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gfiber / kernel / bruno / 26022febf8d067e1ad2f46f11ddeb0a09031481a / . / patch / android.patch
blob: 4d8825dcf7b47d222c7f753c8f8d011181164afe [file] [log] [blame]
diff --git a/stblinux-2.6.37/arch/mips/include/asm/io.h b/stblinux-2.6.37/arch/mips/include/asm/io.h
index e1c2e2e..d789366 100644
--- a/stblinux-2.6.37/arch/mips/include/asm/io.h
+++ b/stblinux-2.6.37/arch/mips/include/asm/io.h
@@ -260,6 +260,10 @@ static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size,
#define ioremap_nocache(offset, size) \
__ioremap_mode((offset), (size), _CACHE_UNCACHED)
+#define ioremap_cached(offset, size) \
+ __ioremap_mode((offset), (size), _CACHE_CACHABLE_NONCOHERENT)
+
+
/*
* ioremap_cachable - map bus memory into CPU space
* @offset: bus address of the memory
diff --git a/stblinux-2.6.37/drivers/char/mem.c b/stblinux-2.6.37/drivers/char/mem.c
index 1256454..f408c21 100644
--- a/stblinux-2.6.37/drivers/char/mem.c
+++ b/stblinux-2.6.37/drivers/char/mem.c
@@ -731,7 +731,11 @@ static loff_t memory_lseek(struct file *file, loff_t offset, int orig)
static int open_port(struct inode * inode, struct file * filp)
{
+#if 0
return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
+#else
+ return 0;
+#endif
}
#define zero_lseek null_lseek
diff --git a/stblinux-2.6.37/drivers/input/Kconfig b/stblinux-2.6.37/drivers/input/Kconfig
index 07c2cd4..dd62135 100644
--- a/stblinux-2.6.37/drivers/input/Kconfig
+++ b/stblinux-2.6.37/drivers/input/Kconfig
@@ -161,6 +161,15 @@ config INPUT_APMPOWER
To compile this driver as a module, choose M here: the
module will be called apm-power.
+config INPUT_KEYRESET
+ tristate "Reset key"
+ depends on INPUT
+ ---help---
+ Say Y here if you want to reboot when some keys are pressed;
+
+ To compile this driver as a module, choose M here: the
+ module will be called keyreset.
+
config XEN_KBDDEV_FRONTEND
tristate "Xen virtual keyboard and mouse support"
depends on XEN_FBDEV_FRONTEND
diff --git a/stblinux-2.6.37/drivers/input/Makefile b/stblinux-2.6.37/drivers/input/Makefile
index 7ad212d..3c71257 100644
--- a/stblinux-2.6.37/drivers/input/Makefile
+++ b/stblinux-2.6.37/drivers/input/Makefile
@@ -24,5 +24,6 @@ obj-$(CONFIG_INPUT_TOUCHSCREEN) += touchscreen/
obj-$(CONFIG_INPUT_MISC) += misc/
obj-$(CONFIG_INPUT_APMPOWER) += apm-power.o
+obj-$(CONFIG_INPUT_KEYRESET) += keyreset.o
obj-$(CONFIG_XEN_KBDDEV_FRONTEND) += xen-kbdfront.o
diff --git a/stblinux-2.6.37/drivers/input/keyreset.c b/stblinux-2.6.37/drivers/input/keyreset.c
new file mode 100644
index 0000000..4905692
--- /dev/null
+++ b/stblinux-2.6.37/drivers/input/keyreset.c
@@ -0,0 +1,229 @@
+/* drivers/input/keyreset.c
+ *
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/input.h>
+#include <linux/keyreset.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/sched.h>
+#include <linux/syscalls.h>
+
+
+struct keyreset_state {
+ struct input_handler input_handler;
+ unsigned long keybit[BITS_TO_LONGS(KEY_CNT)];
+ unsigned long upbit[BITS_TO_LONGS(KEY_CNT)];
+ unsigned long key[BITS_TO_LONGS(KEY_CNT)];
+ spinlock_t lock;
+ int key_down_target;
+ int key_down;
+ int key_up;
+ int restart_disabled;
+};
+
+int restart_requested;
+static void deferred_restart(struct work_struct *dummy)
+{
+ restart_requested = 2;
+ sys_sync();
+ restart_requested = 3;
+ kernel_restart(NULL);
+}
+static DECLARE_WORK(restart_work, deferred_restart);
+
+static void keyreset_event(struct input_handle *handle, unsigned int type,
+ unsigned int code, int value)
+{
+ unsigned long flags;
+ struct keyreset_state *state = handle->private;
+
+ if (type != EV_KEY)
+ return;
+
+ if (code >= KEY_MAX)
+ return;
+
+ if (!test_bit(code, state->keybit))
+ return;
+
+ spin_lock_irqsave(&state->lock, flags);
+ if (!test_bit(code, state->key) == !value)
+ goto done;
+ __change_bit(code, state->key);
+ if (test_bit(code, state->upbit)) {
+ if (value) {
+ state->restart_disabled = 1;
+ state->key_up++;
+ } else
+ state->key_up--;
+ } else {
+ if (value)
+ state->key_down++;
+ else
+ state->key_down--;
+ }
+ if (state->key_down == 0 && state->key_up == 0)
+ state->restart_disabled = 0;
+
+ pr_debug("reset key changed %d %d new state %d-%d-%d\n", code, value,
+ state->key_down, state->key_up, state->restart_disabled);
+
+ if (value && !state->restart_disabled &&
+ state->key_down == state->key_down_target) {
+ state->restart_disabled = 1;
+ if (restart_requested)
+ panic("keyboard reset failed, %d", restart_requested);
+ pr_info("keyboard reset\n");
+ schedule_work(&restart_work);
+ restart_requested = 1;
+ }
+done:
+ spin_unlock_irqrestore(&state->lock, flags);
+}
+
+static int keyreset_connect(struct input_handler *handler,
+ struct input_dev *dev,
+ const struct input_device_id *id)
+{
+ int i;
+ int ret;
+ struct input_handle *handle;
+ struct keyreset_state *state =
+ container_of(handler, struct keyreset_state, input_handler);
+
+ for (i = 0; i < KEY_MAX; i++) {
+ if (test_bit(i, state->keybit) && test_bit(i, dev->keybit))
+ break;
+ }
+ if (i == KEY_MAX)
+ return -ENODEV;
+
+ handle = kzalloc(sizeof(*handle), GFP_KERNEL);
+ if (!handle)
+ return -ENOMEM;
+
+ handle->dev = dev;
+ handle->handler = handler;
+ handle->name = "keyreset";
+ handle->private = state;
+
+ ret = input_register_handle(handle);
+ if (ret)
+ goto err_input_register_handle;
+
+ ret = input_open_device(handle);
+ if (ret)
+ goto err_input_open_device;
+
+ pr_info("using input dev %s for key reset\n", dev->name);
+
+ return 0;
+
+err_input_open_device:
+ input_unregister_handle(handle);
+err_input_register_handle:
+ kfree(handle);
+ return ret;
+}
+
+static void keyreset_disconnect(struct input_handle *handle)
+{
+ input_close_device(handle);
+ input_unregister_handle(handle);
+ kfree(handle);
+}
+
+static const struct input_device_id keyreset_ids[] = {
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
+ .evbit = { BIT_MASK(EV_KEY) },
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(input, keyreset_ids);
+
+static int keyreset_probe(struct platform_device *pdev)
+{
+ int ret;
+ int key, *keyp;
+ struct keyreset_state *state;
+ struct keyreset_platform_data *pdata = pdev->dev.platform_data;
+
+ if (!pdata)
+ return -EINVAL;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ spin_lock_init(&state->lock);
+ keyp = pdata->keys_down;
+ while ((key = *keyp++)) {
+ if (key >= KEY_MAX)
+ continue;
+ state->key_down_target++;
+ __set_bit(key, state->keybit);
+ }
+ if (pdata->keys_up) {
+ keyp = pdata->keys_up;
+ while ((key = *keyp++)) {
+ if (key >= KEY_MAX)
+ continue;
+ __set_bit(key, state->keybit);
+ __set_bit(key, state->upbit);
+ }
+ }
+ state->input_handler.event = keyreset_event;
+ state->input_handler.connect = keyreset_connect;
+ state->input_handler.disconnect = keyreset_disconnect;
+ state->input_handler.name = KEYRESET_NAME;
+ state->input_handler.id_table = keyreset_ids;
+ ret = input_register_handler(&state->input_handler);
+ if (ret) {
+ kfree(state);
+ return ret;
+ }
+ platform_set_drvdata(pdev, state);
+ return 0;
+}
+
+int keyreset_remove(struct platform_device *pdev)
+{
+ struct keyreset_state *state = platform_get_drvdata(pdev);
+ input_unregister_handler(&state->input_handler);
+ kfree(state);
+ return 0;
+}
+
+
+struct platform_driver keyreset_driver = {
+ .driver.name = KEYRESET_NAME,
+ .probe = keyreset_probe,
+ .remove = keyreset_remove,
+};
+
+static int __init keyreset_init(void)
+{
+ return platform_driver_register(&keyreset_driver);
+}
+
+static void __exit keyreset_exit(void)
+{
+ return platform_driver_unregister(&keyreset_driver);
+}
+
+module_init(keyreset_init);
+module_exit(keyreset_exit);
diff --git a/stblinux-2.6.37/drivers/input/misc/Kconfig b/stblinux-2.6.37/drivers/input/misc/Kconfig
index b99b8cb..9cbdc0d 100644
--- a/stblinux-2.6.37/drivers/input/misc/Kconfig
+++ b/stblinux-2.6.37/drivers/input/misc/Kconfig
@@ -312,6 +312,11 @@ config INPUT_WINBOND_CIR
To compile this driver as a module, choose M here: the module will be
called winbond_cir.
+config INPUT_GPIO
+ tristate "GPIO driver support"
+ help
+ Say Y here if you want to support gpio based keys, wheels etc...
+
config HP_SDC_RTC
tristate "HP SDC Real Time Clock"
depends on (GSC || HP300) && SERIO
@@ -348,6 +353,17 @@ config INPUT_PWM_BEEPER
To compile this driver as a module, choose M here: the module will be
called pwm-beeper.
+config INPUT_KEYCHORD
+ tristate "Key chord input driver support"
+ help
+ Say Y here if you want to enable the key chord driver
+ accessible at /dev/keychord. This driver can be used
+ for receiving notifications when client specified key
+ combinations are pressed.
+
+ To compile this driver as a module, choose M here: the
+ module will be called keychord.
+
config INPUT_GPIO_ROTARY_ENCODER
tristate "Rotary encoders connected to GPIO pins"
depends on GPIOLIB && GENERIC_GPIO
diff --git a/stblinux-2.6.37/drivers/input/misc/Makefile b/stblinux-2.6.37/drivers/input/misc/Makefile
index 1fe1f6c..5a3d1f8 100644
--- a/stblinux-2.6.37/drivers/input/misc/Makefile
+++ b/stblinux-2.6.37/drivers/input/misc/Makefile
@@ -42,4 +42,6 @@ obj-$(CONFIG_INPUT_WINBOND_CIR) += winbond-cir.o
obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o
obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o
obj-$(CONFIG_INPUT_YEALINK) += yealink.o
+obj-$(CONFIG_INPUT_GPIO) += gpio_event.o gpio_matrix.o gpio_input.o gpio_output.o gpio_axis.o
+obj-$(CONFIG_INPUT_KEYCHORD) += keychord.o
diff --git a/stblinux-2.6.37/drivers/input/misc/gpio_axis.c b/stblinux-2.6.37/drivers/input/misc/gpio_axis.c
new file mode 100644
index 0000000..30b9f56
--- /dev/null
+++ b/stblinux-2.6.37/drivers/input/misc/gpio_axis.c
@@ -0,0 +1,191 @@
+/* drivers/input/misc/gpio_axis.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/gpio.h>
+#include <linux/gpio_event.h>
+#include <linux/interrupt.h>
+
+struct gpio_axis_state {
+ struct gpio_event_input_devs *input_devs;
+ struct gpio_event_axis_info *info;
+ uint32_t pos;
+};
+
+uint16_t gpio_axis_4bit_gray_map_table[] = {
+ [0x0] = 0x0, [0x1] = 0x1, /* 0000 0001 */
+ [0x3] = 0x2, [0x2] = 0x3, /* 0011 0010 */
+ [0x6] = 0x4, [0x7] = 0x5, /* 0110 0111 */
+ [0x5] = 0x6, [0x4] = 0x7, /* 0101 0100 */
+ [0xc] = 0x8, [0xd] = 0x9, /* 1100 1101 */
+ [0xf] = 0xa, [0xe] = 0xb, /* 1111 1110 */
+ [0xa] = 0xc, [0xb] = 0xd, /* 1010 1011 */
+ [0x9] = 0xe, [0x8] = 0xf, /* 1001 1000 */
+};
+uint16_t gpio_axis_4bit_gray_map(struct gpio_event_axis_info *info, uint16_t in)
+{
+ return gpio_axis_4bit_gray_map_table[in];
+}
+
+uint16_t gpio_axis_5bit_singletrack_map_table[] = {
+ [0x10] = 0x00, [0x14] = 0x01, [0x1c] = 0x02, /* 10000 10100 11100 */
+ [0x1e] = 0x03, [0x1a] = 0x04, [0x18] = 0x05, /* 11110 11010 11000 */
+ [0x08] = 0x06, [0x0a] = 0x07, [0x0e] = 0x08, /* 01000 01010 01110 */
+ [0x0f] = 0x09, [0x0d] = 0x0a, [0x0c] = 0x0b, /* 01111 01101 01100 */
+ [0x04] = 0x0c, [0x05] = 0x0d, [0x07] = 0x0e, /* 00100 00101 00111 */
+ [0x17] = 0x0f, [0x16] = 0x10, [0x06] = 0x11, /* 10111 10110 00110 */
+ [0x02] = 0x12, [0x12] = 0x13, [0x13] = 0x14, /* 00010 10010 10011 */
+ [0x1b] = 0x15, [0x0b] = 0x16, [0x03] = 0x17, /* 11011 01011 00011 */
+ [0x01] = 0x18, [0x09] = 0x19, [0x19] = 0x1a, /* 00001 01001 11001 */
+ [0x1d] = 0x1b, [0x15] = 0x1c, [0x11] = 0x1d, /* 11101 10101 10001 */
+};
+uint16_t gpio_axis_5bit_singletrack_map(
+ struct gpio_event_axis_info *info, uint16_t in)
+{
+ return gpio_axis_5bit_singletrack_map_table[in];
+}
+
+static void gpio_event_update_axis(struct gpio_axis_state *as, int report)
+{
+ struct gpio_event_axis_info *ai = as->info;
+ int i;
+ int change;
+ uint16_t state = 0;
+ uint16_t pos;
+ uint16_t old_pos = as->pos;
+ for (i = ai->count - 1; i >= 0; i--)
+ state = (state << 1) | gpio_get_value(ai->gpio[i]);
+ pos = ai->map(ai, state);
+ if (ai->flags & GPIOEAF_PRINT_RAW)
+ pr_info("axis %d-%d raw %x, pos %d -> %d\n",
+ ai->type, ai->code, state, old_pos, pos);
+ if (report && pos != old_pos) {
+ if (ai->type == EV_REL) {
+ change = (ai->decoded_size + pos - old_pos) %
+ ai->decoded_size;
+ if (change > ai->decoded_size / 2)
+ change -= ai->decoded_size;
+ if (change == ai->decoded_size / 2) {
+ if (ai->flags & GPIOEAF_PRINT_EVENT)
+ pr_info("axis %d-%d unknown direction, "
+ "pos %d -> %d\n", ai->type,
+ ai->code, old_pos, pos);
+ change = 0; /* no closest direction */
+ }
+ if (ai->flags & GPIOEAF_PRINT_EVENT)
+ pr_info("axis %d-%d change %d\n",
+ ai->type, ai->code, change);
+ input_report_rel(as->input_devs->dev[ai->dev],
+ ai->code, change);
+ } else {
+ if (ai->flags & GPIOEAF_PRINT_EVENT)
+ pr_info("axis %d-%d now %d\n",
+ ai->type, ai->code, pos);
+ input_event(as->input_devs->dev[ai->dev],
+ ai->type, ai->code, pos);
+ }
+ input_sync(as->input_devs->dev[ai->dev]);
+ }
+ as->pos = pos;
+}
+
+static irqreturn_t gpio_axis_irq_handler(int irq, void *dev_id)
+{
+ struct gpio_axis_state *as = dev_id;
+ gpio_event_update_axis(as, 1);
+ return IRQ_HANDLED;
+}
+
+int gpio_event_axis_func(struct gpio_event_input_devs *input_devs,
+ struct gpio_event_info *info, void **data, int func)
+{
+ int ret;
+ int i;
+ int irq;
+ struct gpio_event_axis_info *ai;
+ struct gpio_axis_state *as;
+
+ ai = container_of(info, struct gpio_event_axis_info, info);
+ if (func == GPIO_EVENT_FUNC_SUSPEND) {
+ for (i = 0; i < ai->count; i++)
+ disable_irq(gpio_to_irq(ai->gpio[i]));
+ return 0;
+ }
+ if (func == GPIO_EVENT_FUNC_RESUME) {
+ for (i = 0; i < ai->count; i++)
+ enable_irq(gpio_to_irq(ai->gpio[i]));
+ return 0;
+ }
+
+ if (func == GPIO_EVENT_FUNC_INIT) {
+ *data = as = kmalloc(sizeof(*as), GFP_KERNEL);
+ if (as == NULL) {
+ ret = -ENOMEM;
+ goto err_alloc_axis_state_failed;
+ }
+ as->input_devs = input_devs;
+ as->info = ai;
+ if (ai->dev >= input_devs->count) {
+ pr_err("gpio_event_axis: bad device index %d >= %d "
+ "for %d:%d\n", ai->dev, input_devs->count,
+ ai->type, ai->code);
+ ret = -EINVAL;
+ goto err_bad_device_index;
+ }
+
+ input_set_capability(input_devs->dev[ai->dev],
+ ai->type, ai->code);
+ if (ai->type == EV_ABS) {
+ input_set_abs_params(input_devs->dev[ai->dev], ai->code,
+ 0, ai->decoded_size - 1, 0, 0);
+ }
+ for (i = 0; i < ai->count; i++) {
+ ret = gpio_request(ai->gpio[i], "gpio_event_axis");
+ if (ret < 0)
+ goto err_request_gpio_failed;
+ ret = gpio_direction_input(ai->gpio[i]);
+ if (ret < 0)
+ goto err_gpio_direction_input_failed;
+ ret = irq = gpio_to_irq(ai->gpio[i]);
+ if (ret < 0)
+ goto err_get_irq_num_failed;
+ ret = request_irq(irq, gpio_axis_irq_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING,
+ "gpio_event_axis", as);
+ if (ret < 0)
+ goto err_request_irq_failed;
+ }
+ gpio_event_update_axis(as, 0);
+ return 0;
+ }
+
+ ret = 0;
+ as = *data;
+ for (i = ai->count - 1; i >= 0; i--) {
+ free_irq(gpio_to_irq(ai->gpio[i]), as);
+err_request_irq_failed:
+err_get_irq_num_failed:
+err_gpio_direction_input_failed:
+ gpio_free(ai->gpio[i]);
+err_request_gpio_failed:
+ ;
+ }
+err_bad_device_index:
+ kfree(as);
+ *data = NULL;
+err_alloc_axis_state_failed:
+ return ret;
+}
diff --git a/stblinux-2.6.37/drivers/leds/ledtrig-sleep.c b/stblinux-2.6.37/drivers/leds/ledtrig-sleep.c
new file mode 100644
index 0000000..f164042
--- /dev/null
+++ b/stblinux-2.6.37/drivers/leds/ledtrig-sleep.c
@@ -0,0 +1,80 @@
+/* drivers/leds/ledtrig-sleep.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/earlysuspend.h>
+#include <linux/leds.h>
+#include <linux/suspend.h>
+
+static int ledtrig_sleep_pm_callback(struct notifier_block *nfb,
+ unsigned long action,
+ void *ignored);
+
+DEFINE_LED_TRIGGER(ledtrig_sleep)
+static struct notifier_block ledtrig_sleep_pm_notifier = {
+ .notifier_call = ledtrig_sleep_pm_callback,
+ .priority = 0,
+};
+
+static void ledtrig_sleep_early_suspend(struct early_suspend *h)
+{
+ led_trigger_event(ledtrig_sleep, LED_FULL);
+}
+
+static void ledtrig_sleep_early_resume(struct early_suspend *h)
+{
+ led_trigger_event(ledtrig_sleep, LED_OFF);
+}
+
+static struct early_suspend ledtrig_sleep_early_suspend_handler = {
+ .suspend = ledtrig_sleep_early_suspend,
+ .resume = ledtrig_sleep_early_resume,
+};
+
+static int ledtrig_sleep_pm_callback(struct notifier_block *nfb,
+ unsigned long action,
+ void *ignored)
+{
+ switch (action) {
+ case PM_HIBERNATION_PREPARE:
+ case PM_SUSPEND_PREPARE:
+ led_trigger_event(ledtrig_sleep, LED_OFF);
+ return NOTIFY_OK;
+ case PM_POST_HIBERNATION:
+ case PM_POST_SUSPEND:
+ led_trigger_event(ledtrig_sleep, LED_FULL);
+ return NOTIFY_OK;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int __init ledtrig_sleep_init(void)
+{
+ led_trigger_register_simple("sleep", &ledtrig_sleep);
+ register_pm_notifier(&ledtrig_sleep_pm_notifier);
+ register_early_suspend(&ledtrig_sleep_early_suspend_handler);
+ return 0;
+}
+
+static void __exit ledtrig_sleep_exit(void)
+{
+ unregister_early_suspend(&ledtrig_sleep_early_suspend_handler);
+ unregister_pm_notifier(&ledtrig_sleep_pm_notifier);
+ led_trigger_unregister_simple(ledtrig_sleep);
+}
+
+module_init(ledtrig_sleep_init);
+module_exit(ledtrig_sleep_exit);
+
diff --git a/stblinux-2.6.37/drivers/media/video/uvc/uvc_driver.c b/stblinux-2.6.37/drivers/media/video/uvc/uvc_driver.c
index a1e9dfb..c921d0f 100644
--- a/stblinux-2.6.37/drivers/media/video/uvc/uvc_driver.c
+++ b/stblinux-2.6.37/drivers/media/video/uvc/uvc_driver.c
@@ -22,7 +22,7 @@
* Huffman tables (DHT marker), you will need to add it back if your JPEG
* codec can't handle MJPEG data.
*/
-
+#include <linux/ctype.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -302,6 +302,10 @@ static int uvc_parse_format(struct uvc_device *dev,
switch (buffer[2]) {
case UVC_VS_FORMAT_UNCOMPRESSED:
case UVC_VS_FORMAT_FRAME_BASED:
+ {
+ const __u8 *guid = &buffer[5];
+ const __u8 uvc_guid_template[16] = UVC_GUID_FORMAT_TEMPLATE;
+
n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
if (buflen < n) {
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
@@ -311,19 +315,40 @@ static int uvc_parse_format(struct uvc_device *dev,
return -EINVAL;
}
- /* Find the format descriptor from its GUID. */
- fmtdesc = uvc_format_by_guid(&buffer[5]);
+ /* Find the format descriptor from its GUID first.
+ * If no known format matches then check if the last 12 bytes
+ * of the GUID match the following UVC format GUID template:
+ * {????????-0000-0010-8000-00AA00389B71}
+ * If they match and the first four bytes are alphanumeric
+ * then use the first four bytes as a FourCC code and create a
+ * custom name based on it.
+ */
+ fmtdesc = uvc_format_by_guid(guid);
if (fmtdesc != NULL) {
strlcpy(format->name, fmtdesc->name,
sizeof format->name);
format->fcc = fmtdesc->fcc;
+ } else if (memcmp(&guid[4], &uvc_guid_template[4], 12) == 0) {
+ uvc_trace(UVC_TRACE_DESCR, "Unknown UVC format found: "
+ UVC_GUID_FORMAT "\n",
+ UVC_GUID_ARGS(guid));
+ i = 0;
+ while(i++ < 4 && isalnum(guid[i]));
+ if (i == 4) {
+ format->fcc = *(__u32 *)guid;
+ snprintf(format->name, sizeof format->name,
+ "Custom (%c%c%c%c)",
+ guid[0], guid[1], guid[2], guid[3]);
+ uvc_trace(UVC_TRACE_DESCR,
+ "Treating unknown UVC format as: %s\n",
+ format->name);
+ }
} else {
- uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
- &buffer[5]);
- snprintf(format->name, sizeof(format->name), "%pUl\n",
- &buffer[5]);
- format->fcc = 0;
+ uvc_printk(KERN_INFO, "Skipping unknown video format: "
+ UVC_GUID_FORMAT "\n",
+ UVC_GUID_ARGS(guid));
+ return -EINVAL;
}
format->bpp = buffer[21];
@@ -335,6 +360,7 @@ static int uvc_parse_format(struct uvc_device *dev,
format->flags = UVC_FMT_FLAG_COMPRESSED;
}
break;
+ }
case UVC_VS_FORMAT_MJPEG:
if (buflen < 11) {
@@ -2263,6 +2289,39 @@ static struct usb_device_id uvc_ids[] = {
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_PROBE_MINMAX
| UVC_QUIRK_IGNORE_SELECTOR_UNIT },
+ /* Logitech Tv Camera */
+ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
+ | USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = 0x046d,
+ .idProduct = 0x080c,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 0,
+ .driver_info = UVC_QUIRK_CUT_EXTRA_EOI },
+ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
+ | USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = 0x046d,
+ .idProduct = 0x0828,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 0,
+ .driver_info = UVC_QUIRK_CUT_EXTRA_EOI },
+ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
+ | USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = 0x046d,
+ .idProduct = 0x0831,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 0,
+ .driver_info = UVC_QUIRK_CUT_EXTRA_EOI },
+ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
+ | USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = 0x046d,
+ .idProduct = 0x0832,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 0,
+ .driver_info = UVC_QUIRK_CUT_EXTRA_EOI },
/* Generic USB Video Class */
{ USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
{}
diff --git a/stblinux-2.6.37/drivers/media/video/uvc/uvc_v4l2.c b/stblinux-2.6.37/drivers/media/video/uvc/uvc_v4l2.c
index 8cf61e8..f5ef56a 100644
--- a/stblinux-2.6.37/drivers/media/video/uvc/uvc_v4l2.c
+++ b/stblinux-2.6.37/drivers/media/video/uvc/uvc_v4l2.c
@@ -1034,6 +1034,37 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
case UVCIOC_CTRL_SET:
return uvc_xu_ctrl_query(chain, arg, 1);
+ case UVCIOC_CTRL_GET_EX:
+ case UVCIOC_CTRL_SET_EX:
+ {
+ struct uvc_xu_control_ex *ctrlex = arg;
+ struct uvc_xu_control ctrl = {
+ .unit = 0,
+ .selector = ctrlex->selector,
+ .size = ctrlex->size,
+ .data = ctrlex->data
+ };
+ struct uvc_entity *entity;
+
+ /* Find the extension unit. */
+ list_for_each_entry(entity, &chain->extensions, chain) {
+ if (memcmp(entity->extension.guidExtensionCode,
+ ctrlex->entity, 16) == 0) {
+ ctrl.unit = entity->id;
+ break;
+ }
+ }
+ if (ctrl.unit == 0) {
+ uvc_trace(UVC_TRACE_CONTROL, "Extension unit "
+ UVC_GUID_FORMAT" not found.\n",
+ UVC_GUID_ARGS(ctrlex->entity));
+ return -EINVAL;
+ }
+
+ return uvc_xu_ctrl_query(chain, &ctrl,
+ cmd == UVCIOC_CTRL_GET_EX ? 0 : 1);
+ }
+
default:
if ((ret = v4l_compat_translate_ioctl(file, cmd, arg,
uvc_v4l2_do_ioctl)) == -ENOIOCTLCMD)
diff --git a/stblinux-2.6.37/drivers/media/video/uvc/uvc_video.c b/stblinux-2.6.37/drivers/media/video/uvc/uvc_video.c
index 5673d67..66d5735 100644
--- a/stblinux-2.6.37/drivers/media/video/uvc/uvc_video.c
+++ b/stblinux-2.6.37/drivers/media/video/uvc/uvc_video.c
@@ -534,6 +534,31 @@ static void uvc_video_decode_end(struct uvc_streaming *stream,
if (stream->dev->quirks & UVC_QUIRK_STREAM_NO_FID)
stream->last_fid ^= UVC_STREAM_FID;
}
+ if ((stream->dev->quirks & UVC_QUIRK_CUT_EXTRA_EOI) &&
+ stream->cur_format->fcc != V4L2_PIX_FMT_YUYV) {
+ struct uvc_video_queue *queue = &stream->queue;
+ __u8 *mem = queue->mem + buf->buf.m.offset;
+ __u8 *cur = mem + buf->buf.bytesused - 1;
+
+ if (buf->buf.bytesused >= 1 && *cur == 0xFF) {
+ /* Cut off trailing 0xFF bytes */
+ uvc_warn_once(stream->dev, UVC_WARN_CUT_EXTRA_EOI,
+ "Cutting off extra 0xFF.\n");
+ buf->buf.bytesused--;
+ }
+ else if (buf->buf.bytesused >= 2) {
+ /* Skip zero bytes at the end but leave at least two bytes */
+ while ((cur > mem + 1) && (*cur == 0))
+ cur--;
+ /* If we encountered a 0xFFD9 marker strip it off (together
+ * with the trailing zeroes. */
+ if (*(cur - 1) == 0xFF && *cur == 0xD9) {
+ uvc_warn_once(stream->dev, UVC_WARN_CUT_EXTRA_EOI,
+ "Cutting off extra EOI.\n");
+ buf->buf.bytesused = (cur - mem) - 1;
+ }
+ }
+ }
}
/* Video payload encoding is handled by uvc_video_encode_header() and
diff --git a/stblinux-2.6.37/drivers/media/video/uvc/uvcvideo.h b/stblinux-2.6.37/drivers/media/video/uvc/uvcvideo.h
index 45f01e7..6659096 100644
--- a/stblinux-2.6.37/drivers/media/video/uvc/uvcvideo.h
+++ b/stblinux-2.6.37/drivers/media/video/uvc/uvcvideo.h
@@ -73,11 +73,20 @@ struct uvc_xu_control {
__u8 __user *data;
};
+struct uvc_xu_control_ex {
+ __u8 entity[16];
+ __u8 selector;
+ __u16 size;
+ __u8 __user *data;
+};
+
#define UVCIOC_CTRL_ADD _IOW('U', 1, struct uvc_xu_control_info)
#define UVCIOC_CTRL_MAP_OLD _IOWR('U', 2, struct uvc_xu_control_mapping_old)
#define UVCIOC_CTRL_MAP _IOWR('U', 2, struct uvc_xu_control_mapping)
#define UVCIOC_CTRL_GET _IOWR('U', 3, struct uvc_xu_control)
#define UVCIOC_CTRL_SET _IOW('U', 4, struct uvc_xu_control)
+#define UVCIOC_CTRL_GET_EX _IOWR('U', 5, struct uvc_xu_control_ex)
+#define UVCIOC_CTRL_SET_EX _IOW('U', 6, struct uvc_xu_control_ex)
#ifdef __KERNEL__
@@ -122,6 +131,23 @@ struct uvc_xu_control {
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
+#define UVC_GUID_LOGITECH_DEV_INFO \
+ {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
+ 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1e}
+#define UVC_GUID_LOGITECH_USER_HW \
+ {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
+ 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1f}
+#define UVC_GUID_LOGITECH_VIDEO \
+ {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
+ 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x50}
+#define UVC_GUID_LOGITECH_MOTOR \
+ {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
+ 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x56}
+
+#define UVC_GUID_FORMAT_TEMPLATE \
+ { '?', '?', '?', '?', 0x00, 0x00, 0x10, 0x00, \
+ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+
#define UVC_GUID_FORMAT_MJPEG \
{ 'M', 'J', 'P', 'G', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
@@ -185,6 +211,7 @@ struct uvc_xu_control {
#define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
#define UVC_QUIRK_PROBE_DEF 0x00000100
#define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
+#define UVC_QUIRK_CUT_EXTRA_EOI 0x00000200
/* Format flags */
#define UVC_FMT_FLAG_COMPRESSED 0x00000001
@@ -412,6 +439,7 @@ struct uvc_video_chain {
struct list_head entities; /* All entities */
struct uvc_entity *processing; /* Processing unit */
struct uvc_entity *selector; /* Selector unit */
+ struct list_head extensions;
struct mutex ctrl_mutex; /* Protects ctrl.info */
};
@@ -532,6 +560,7 @@ struct uvc_driver {
#define UVC_WARN_MINMAX 0
#define UVC_WARN_PROBE_DEF 1
+#define UVC_WARN_CUT_EXTRA_EOI 2
extern unsigned int uvc_clock_param;
extern unsigned int uvc_no_drop_param;
@@ -553,6 +582,16 @@ extern unsigned int uvc_timeout_param;
#define uvc_printk(level, msg...) \
printk(level "uvcvideo: " msg)
+#define UVC_GUID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \
+ "%02x%02x%02x%02x%02x%02x"
+#define UVC_GUID_ARGS(guid) \
+ (guid)[3], (guid)[2], (guid)[1], (guid)[0], \
+ (guid)[5], (guid)[4], \
+ (guid)[7], (guid)[6], \
+ (guid)[8], (guid)[9], \
+ (guid)[10], (guid)[11], (guid)[12], \
+ (guid)[13], (guid)[14], (guid)[15]
+
/* --------------------------------------------------------------------------
* Internal functions.
*/
diff --git a/stblinux-2.6.37/drivers/misc/Kconfig b/stblinux-2.6.37/drivers/misc/Kconfig
index 4d073f1..73fc71c 100644
--- a/stblinux-2.6.37/drivers/misc/Kconfig
+++ b/stblinux-2.6.37/drivers/misc/Kconfig
@@ -53,6 +53,14 @@ config AD525X_DPOT_SPI
To compile this driver as a module, choose M here: the
module will be called ad525x_dpot-spi.
+config ANDROID_PMEM
+ bool "Android pmem allocator"
+ default y
+
+config ANDROID_PMEM_RUA
+ tristate "Android rua pmem allocator"
+ default n
+
config ATMEL_PWM
tristate "Atmel AT32/AT91 PWM support"
depends on AVR32 || ARCH_AT91SAM9263 || ARCH_AT91SAM9RL || ARCH_AT91CAP9
@@ -208,6 +216,13 @@ config ENCLOSURE_SERVICES
driver (SCSI/ATA) which supports enclosures
or a SCSI enclosure device (SES) to use these services.
+config KERNEL_DEBUGGER_CORE
+ bool "Kernel Debugger Core"
+ default n
+ ---help---
+ Generic kernel debugging command processor used by low level
+ (interrupt context) platform-specific debuggers.
+
config SGI_XP
tristate "Support communication between SGI SSIs"
depends on NET
@@ -312,6 +327,17 @@ config ISL29003
This driver can also be built as a module. If so, the module
will be called isl29003.
+config UID_STAT
+ bool "UID based statistics tracking exported to /proc/uid_stat"
+ default n
+
+config WL127X_RFKILL
+ tristate "Bluetooth power control driver for TI wl127x"
+ depends on RFKILL
+ default n
+ ---help---
+ Creates an rfkill entry in sysfs for power control of Bluetooth
+ TI wl127x chips.
config ISL29020
tristate "Intersil ISL29020 ambient light sensor"
diff --git a/stblinux-2.6.37/drivers/misc/Makefile b/stblinux-2.6.37/drivers/misc/Makefile
index 98009cc..11d7ff5 100644
--- a/stblinux-2.6.37/drivers/misc/Makefile
+++ b/stblinux-2.6.37/drivers/misc/Makefile
@@ -15,11 +15,14 @@ obj-$(CONFIG_LKDTM) += lkdtm.o
obj-$(CONFIG_TIFM_CORE) += tifm_core.o
obj-$(CONFIG_TIFM_7XX1) += tifm_7xx1.o
obj-$(CONFIG_PHANTOM) += phantom.o
+obj-$(CONFIG_ANDROID_PMEM) += pmem.o
+obj-$(CONFIG_ANDROID_PMEM_RUA) += pmem_rua.o
obj-$(CONFIG_SENSORS_BH1780) += bh1780gli.o
obj-$(CONFIG_SENSORS_BH1770) += bh1770glc.o
obj-$(CONFIG_SENSORS_APDS990X) += apds990x.o
obj-$(CONFIG_SGI_IOC4) += ioc4.o
obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
+obj-$(CONFIG_KERNEL_DEBUGGER_CORE) += kernel_debugger.o
obj-$(CONFIG_KGDB_TESTS) += kgdbts.o
obj-$(CONFIG_SGI_XP) += sgi-xp/
obj-$(CONFIG_SGI_GRU) += sgi-gru/
@@ -28,6 +31,7 @@ obj-$(CONFIG_HP_ILO) += hpilo.o
obj-$(CONFIG_APDS9802ALS) += apds9802als.o
obj-$(CONFIG_ISL29003) += isl29003.o
obj-$(CONFIG_ISL29020) += isl29020.o
+obj-$(CONFIG_UID_STAT) += uid_stat.o
obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o
obj-$(CONFIG_EP93XX_PWM) += ep93xx_pwm.o
obj-$(CONFIG_DS1682) += ds1682.o
@@ -37,6 +41,7 @@ obj-$(CONFIG_IWMC3200TOP) += iwmc3200top/
obj-$(CONFIG_HMC6352) += hmc6352.o
obj-y += eeprom/
obj-y += cb710/
+obj-$(CONFIG_WL127X_RFKILL) += wl127x-rfkill.o
obj-$(CONFIG_VMWARE_BALLOON) += vmw_balloon.o
obj-$(CONFIG_ARM_CHARLCD) += arm-charlcd.o
obj-$(CONFIG_PCH_PHUB) += pch_phub.o
diff --git a/stblinux-2.6.37/drivers/misc/kernel_debugger.c b/stblinux-2.6.37/drivers/misc/kernel_debugger.c
new file mode 100644
index 0000000..f10eaa4
--- /dev/null
+++ b/stblinux-2.6.37/drivers/misc/kernel_debugger.c
@@ -0,0 +1,79 @@
+/* drivers/android/kernel_debugger.c
+ *
+ * Guts of the kernel debugger.
+ * Needs something to actually push commands to it.
+ *
+ * Copyright (C) 2007-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/ctype.h>
+#include <linux/device.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/sysrq.h>
+#include <linux/kernel_debugger.h>
+
+#define dprintf(fmt...) (ctxt->printf(ctxt->cookie, fmt))
+
+static void do_ps(struct kdbg_ctxt *ctxt)
+{
+ struct task_struct *g, *p;
+ unsigned state;
+ static const char stat_nam[] = "RSDTtZX";
+
+ dprintf("pid ppid prio task pc\n");
+ read_lock(&tasklist_lock);
+ do_each_thread(g, p) {
+ state = p->state ? __ffs(p->state) + 1 : 0;
+ dprintf("%5d %5d %4d ", p->pid, p->parent->pid, p->prio);
+ dprintf("%-13.13s %c", p->comm,
+ state >= sizeof(stat_nam) ? '?' : stat_nam[state]);
+ if (state == TASK_RUNNING)
+ dprintf(" running\n");
+ else
+ dprintf(" %08lx\n", thread_saved_pc(p));
+ } while_each_thread(g, p);
+ read_unlock(&tasklist_lock);
+}
+
+int log_buf_copy(char *dest, int idx, int len);
+extern int do_syslog(int type, char __user *bug, int count);
+static void do_sysrq(struct kdbg_ctxt *ctxt, char rq)
+{
+ char buf[128];
+ int ret;
+ int idx = 0;
+ do_syslog(5 /* clear */, NULL, 0);
+ __handle_sysrq(rq, NULL, 0);
+ while (1) {
+ ret = log_buf_copy(buf, idx, sizeof(buf) - 1);
+ if (ret <= 0)
+ break;
+ buf[ret] = 0;
+ dprintf("%s", buf);
+ idx += ret;
+ }
+}
+
+int kernel_debugger(struct kdbg_ctxt *ctxt, char *cmd)
+{
+ if (!strcmp(cmd, "ps"))
+ do_ps(ctxt);
+ if (!strcmp(cmd, "sysrq"))
+ do_sysrq(ctxt, 'h');
+ if (!strncmp(cmd, "sysrq ", 6))
+ do_sysrq(ctxt, cmd[6]);
+
+ return 0;
+}
+
diff --git a/stblinux-2.6.37/drivers/misc/pmem.c b/stblinux-2.6.37/drivers/misc/pmem.c
new file mode 100644
index 0000000..c265788
--- /dev/null
+++ b/stblinux-2.6.37/drivers/misc/pmem.c
@@ -0,0 +1,1346 @@
+/* drivers/android/pmem.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/miscdevice.h>
+#include <linux/platform_device.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/mm.h>
+#include <linux/list.h>
+#include <linux/debugfs.h>
+#include <linux/android_pmem.h>
+#include <linux/mempolicy.h>
+#include <linux/sched.h>
+#include <linux/semaphore.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/cacheflush.h>
+
+#define PMEM_MAX_DEVICES 10
+#define PMEM_MAX_ORDER 128
+#define PMEM_MIN_ALLOC PAGE_SIZE
+
+#define PMEM_DEBUG 1
+
+/* indicates that a refernce to this file has been taken via get_pmem_file,
+ * the file should not be released until put_pmem_file is called */
+#define PMEM_FLAGS_BUSY 0x1
+/* indicates that this is a suballocation of a larger master range */
+#define PMEM_FLAGS_CONNECTED 0x1 << 1
+/* indicates this is a master and not a sub allocation and that it is mmaped */
+#define PMEM_FLAGS_MASTERMAP 0x1 << 2
+/* submap and unsubmap flags indicate:
+ * 00: subregion has never been mmaped
+ * 10: subregion has been mmaped, reference to the mm was taken
+ * 11: subretion has ben released, refernece to the mm still held
+ * 01: subretion has been released, reference to the mm has been released
+ */
+#define PMEM_FLAGS_SUBMAP 0x1 << 3
+#define PMEM_FLAGS_UNSUBMAP 0x1 << 4
+
+
+struct pmem_data {
+ /* in alloc mode: an index into the bitmap
+ * in no_alloc mode: the size of the allocation */
+ int index;
+ /* see flags above for descriptions */
+ unsigned int flags;
+ /* protects this data field, if the mm_mmap sem will be held at the
+ * same time as this sem, the mm sem must be taken first (as this is
+ * the order for vma_open and vma_close ops */
+ struct rw_semaphore sem;
+ /* info about the mmaping process */
+ struct vm_area_struct *vma;
+ /* task struct of the mapping process */
+ struct task_struct *task;
+ /* process id of teh mapping process */
+ pid_t pid;
+ /* file descriptor of the master */
+ int master_fd;
+ /* file struct of the master */
+ struct file *master_file;
+ /* a list of currently available regions if this is a suballocation */
+ struct list_head region_list;
+ /* a linked list of data so we can access them for debugging */
+ struct list_head list;
+#if PMEM_DEBUG
+ int ref;
+#endif
+};
+
+struct pmem_bits {
+ unsigned allocated:1; /* 1 if allocated, 0 if free */
+ unsigned order:7; /* size of the region in pmem space */
+};
+
+struct pmem_region_node {
+ struct pmem_region region;
+ struct list_head list;
+};
+
+#define PMEM_DEBUG_MSGS 0
+#if PMEM_DEBUG_MSGS
+#define DLOG(fmt,args...) \
+ do { printk(KERN_INFO "[%s:%s:%d] "fmt, __FILE__, __func__, __LINE__, \
+ ##args); } \
+ while (0)
+#else
+#define DLOG(x...) do {} while (0)
+#endif
+
+struct pmem_info {
+ struct miscdevice dev;
+ /* physical start address of the remaped pmem space */
+ unsigned long base;
+ /* vitual start address of the remaped pmem space */
+ unsigned char __iomem *vbase;
+ /* total size of the pmem space */
+ unsigned long size;
+ /* number of entries in the pmem space */
+ unsigned long num_entries;
+ /* pfn of the garbage page in memory */
+ unsigned long garbage_pfn;
+ /* index of the garbage page in the pmem space */
+ int garbage_index;
+ /* the bitmap for the region indicating which entries are allocated
+ * and which are free */
+ struct pmem_bits *bitmap;
+ /* indicates the region should not be managed with an allocator */
+ unsigned no_allocator;
+ /* indicates maps of this region should be cached, if a mix of
+ * cached and uncached is desired, set this and open the device with
+ * O_SYNC to get an uncached region */
+ unsigned cached;
+ unsigned buffered;
+ /* in no_allocator mode the first mapper gets the whole space and sets
+ * this flag */
+ unsigned allocated;
+ /* for debugging, creates a list of pmem file structs, the
+ * data_list_sem should be taken before pmem_data->sem if both are
+ * needed */
+ struct semaphore data_list_sem;
+ struct list_head data_list;
+ /* pmem_sem protects the bitmap array
+ * a write lock should be held when modifying entries in bitmap
+ * a read lock should be held when reading data from bits or
+ * dereferencing a pointer into bitmap
+ *
+ * pmem_data->sem protects the pmem data of a particular file
+ * Many of the function that require the pmem_data->sem have a non-
+ * locking version for when the caller is already holding that sem.
+ *
+ * IF YOU TAKE BOTH LOCKS TAKE THEM IN THIS ORDER:
+ * down(pmem_data->sem) => down(bitmap_sem)
+ */
+ struct rw_semaphore bitmap_sem;
+
+ long (*ioctl)(struct file *, unsigned int, unsigned long);
+ int (*release)(struct inode *, struct file *);
+};
+
+static struct pmem_info pmem[PMEM_MAX_DEVICES];
+static int id_count;
+
+#define PMEM_IS_FREE(id, index) !(pmem[id].bitmap[index].allocated)
+#define PMEM_ORDER(id, index) pmem[id].bitmap[index].order
+#define PMEM_BUDDY_INDEX(id, index) (index ^ (1 << PMEM_ORDER(id, index)))
+#define PMEM_NEXT_INDEX(id, index) (index + (1 << PMEM_ORDER(id, index)))
+#define PMEM_OFFSET(index) (index * PMEM_MIN_ALLOC)
+#define PMEM_START_ADDR(id, index) (PMEM_OFFSET(index) + pmem[id].base)
+#define PMEM_LEN(id, index) ((1 << PMEM_ORDER(id, index)) * PMEM_MIN_ALLOC)
+#define PMEM_END_ADDR(id, index) (PMEM_START_ADDR(id, index) + \
+ PMEM_LEN(id, index))
+#define PMEM_START_VADDR(id, index) (PMEM_OFFSET(id, index) + pmem[id].vbase)
+#define PMEM_END_VADDR(id, index) (PMEM_START_VADDR(id, index) + \
+ PMEM_LEN(id, index))
+#define PMEM_REVOKED(data) (data->flags & PMEM_FLAGS_REVOKED)
+#define PMEM_IS_PAGE_ALIGNED(addr) (!((addr) & (~PAGE_MASK)))
+#define PMEM_IS_SUBMAP(data) ((data->flags & PMEM_FLAGS_SUBMAP) && \
+ (!(data->flags & PMEM_FLAGS_UNSUBMAP)))
+
+static int pmem_release(struct inode *, struct file *);
+static int pmem_mmap(struct file *, struct vm_area_struct *);
+static int pmem_open(struct inode *, struct file *);
+static long pmem_ioctl(struct file *, unsigned int, unsigned long);
+
+struct file_operations pmem_fops = {
+ .release = pmem_release,
+ .mmap = pmem_mmap,
+ .open = pmem_open,
+ .unlocked_ioctl = pmem_ioctl,
+};
+
+static int get_id(struct file *file)
+{
+ return MINOR(file->f_dentry->d_inode->i_rdev);
+}
+
+static int is_pmem_file(struct file *file)
+{
+ int id;
+
+ if (unlikely(!file || !file->f_dentry || !file->f_dentry->d_inode))
+ return 0;
+ id = get_id(file);
+ if (unlikely(id >= PMEM_MAX_DEVICES))
+ return 0;
+ if (unlikely(file->f_dentry->d_inode->i_rdev !=
+ MKDEV(MISC_MAJOR, pmem[id].dev.minor)))
+ return 0;
+ return 1;
+}
+
+static int has_allocation(struct file *file)
+{
+ struct pmem_data *data;
+ /* check is_pmem_file first if not accessed via pmem_file_ops */
+
+ if (unlikely(!file->private_data))
+ return 0;
+ data = (struct pmem_data *)file->private_data;
+ if (unlikely(data->index < 0))
+ return 0;
+ return 1;
+}
+
+static int is_master_owner(struct file *file)
+{
+ struct file *master_file;
+ struct pmem_data *data;
+ int put_needed, ret = 0;
+
+ if (!is_pmem_file(file) || !has_allocation(file))
+ return 0;
+ data = (struct pmem_data *)file->private_data;
+ if (PMEM_FLAGS_MASTERMAP & data->flags)
+ return 1;
+ master_file = fget_light(data->master_fd, &put_needed);
+ if (master_file && data->master_file == master_file)
+ ret = 1;
+ fput_light(master_file, put_needed);
+ return ret;
+}
+
+static int pmem_free(int id, int index)
+{
+ /* caller should hold the write lock on pmem_sem! */
+ int buddy, curr = index;
+ DLOG("index %d\n", index);
+
+ if (pmem[id].no_allocator) {
+ pmem[id].allocated = 0;
+ return 0;
+ }
+ /* clean up the bitmap, merging any buddies */
+ pmem[id].bitmap[curr].allocated = 0;
+ /* find a slots buddy Buddy# = Slot# ^ (1 << order)
+ * if the buddy is also free merge them
+ * repeat until the buddy is not free or end of the bitmap is reached
+ */
+ do {
+ buddy = PMEM_BUDDY_INDEX(id, curr);
+ if (PMEM_IS_FREE(id, buddy) &&
+ PMEM_ORDER(id, buddy) == PMEM_ORDER(id, curr)) {
+ PMEM_ORDER(id, buddy)++;
+ PMEM_ORDER(id, curr)++;
+ curr = min(buddy, curr);
+ } else {
+ break;
+ }
+ } while (curr < pmem[id].num_entries);
+
+ return 0;
+}
+
+static void pmem_revoke(struct file *file, struct pmem_data *data);
+
+static int pmem_release(struct inode *inode, struct file *file)
+{
+ struct pmem_data *data = (struct pmem_data *)file->private_data;
+ struct pmem_region_node *region_node;
+ struct list_head *elt, *elt2;
+ int id = get_id(file), ret = 0;
+
+
+ down(&pmem[id].data_list_sem);
+ /* if this file is a master, revoke all the memory in the connected
+ * files */
+ if (PMEM_FLAGS_MASTERMAP & data->flags) {
+ struct pmem_data *sub_data;
+ list_for_each(elt, &pmem[id].data_list) {
+ sub_data = list_entry(elt, struct pmem_data, list);
+ down_read(&sub_data->sem);
+ if (PMEM_IS_SUBMAP(sub_data) &&
+ file == sub_data->master_file) {
+ up_read(&sub_data->sem);
+ pmem_revoke(file, sub_data);
+ } else
+ up_read(&sub_data->sem);
+ }
+ }
+ list_del(&data->list);
+ up(&pmem[id].data_list_sem);
+
+
+ down_write(&data->sem);
+
+ /* if its not a conencted file and it has an allocation, free it */
+ if (!(PMEM_FLAGS_CONNECTED & data->flags) && has_allocation(file)) {
+ down_write(&pmem[id].bitmap_sem);
+ ret = pmem_free(id, data->index);
+ up_write(&pmem[id].bitmap_sem);
+ }
+
+ /* if this file is a submap (mapped, connected file), downref the
+ * task struct */
+ if (PMEM_FLAGS_SUBMAP & data->flags)
+ if (data->task) {
+ put_task_struct(data->task);
+ data->task = NULL;
+ }
+
+ file->private_data = NULL;
+
+ list_for_each_safe(elt, elt2, &data->region_list) {
+ region_node = list_entry(elt, struct pmem_region_node, list);
+ list_del(elt);
+ kfree(region_node);
+ }
+ BUG_ON(!list_empty(&data->region_list));
+
+ up_write(&data->sem);
+ kfree(data);
+ if (pmem[id].release)
+ ret = pmem[id].release(inode, file);
+
+ return ret;
+}
+
+static int pmem_open(struct inode *inode, struct file *file)
+{
+ struct pmem_data *data;
+ int id = get_id(file);
+ int ret = 0;
+
+ DLOG("current %u file %p(%d)\n", current->pid, file, file_count(file));
+ /* setup file->private_data to indicate its unmapped */
+ /* you can only open a pmem device one time */
+ if (file->private_data != NULL)
+ return -1;
+ data = kmalloc(sizeof(struct pmem_data), GFP_KERNEL);
+ if (!data) {
+ printk("pmem: unable to allocate memory for pmem metadata.");
+ return -1;
+ }
+ data->flags = 0;
+ data->index = -1;
+ data->task = NULL;
+ data->vma = NULL;
+ data->pid = 0;
+ data->master_file = NULL;
+#if PMEM_DEBUG
+ data->ref = 0;
+#endif
+ INIT_LIST_HEAD(&data->region_list);
+ init_rwsem(&data->sem);
+
+ file->private_data = data;
+ INIT_LIST_HEAD(&data->list);
+
+ down(&pmem[id].data_list_sem);
+ list_add(&data->list, &pmem[id].data_list);
+ up(&pmem[id].data_list_sem);
+ return ret;
+}
+
+static unsigned long pmem_order(unsigned long len)
+{
+ int i;
+
+ len = (len + PMEM_MIN_ALLOC - 1)/PMEM_MIN_ALLOC;
+ len--;
+ for (i = 0; i < sizeof(len)*8; i++)
+ if (len >> i == 0)
+ break;
+ return i;
+}
+
+static int pmem_allocate(int id, unsigned long len)
+{
+ /* caller should hold the write lock on pmem_sem! */
+ /* return the corresponding pdata[] entry */
+ int curr = 0;
+ int end = pmem[id].num_entries;
+ int best_fit = -1;
+ unsigned long order = pmem_order(len);
+
+ if (pmem[id].no_allocator) {
+ DLOG("no allocator");
+ if ((len > pmem[id].size) || pmem[id].allocated)
+ return -1;
+ pmem[id].allocated = 1;
+ return len;
+ }
+
+ if (order > PMEM_MAX_ORDER)
+ return -1;
+ DLOG("order %lx\n", order);
+
+ /* look through the bitmap:
+ * if you find a free slot of the correct order use it
+ * otherwise, use the best fit (smallest with size > order) slot
+ */
+ while (curr < end) {
+ if (PMEM_IS_FREE(id, curr)) {
+ if (PMEM_ORDER(id, curr) == (unsigned char)order) {
+ /* set the not free bit and clear others */
+ best_fit = curr;
+ break;
+ }
+ if (PMEM_ORDER(id, curr) > (unsigned char)order &&
+ (best_fit < 0 ||
+ PMEM_ORDER(id, curr) < PMEM_ORDER(id, best_fit)))
+ best_fit = curr;
+ }
+ curr = PMEM_NEXT_INDEX(id, curr);
+ }
+
+ /* if best_fit < 0, there are no suitable slots,
+ * return an error
+ */
+ if (best_fit < 0) {
+ printk("pmem: no space left to allocate!\n");
+ return -1;
+ }
+
+ /* now partition the best fit:
+ * split the slot into 2 buddies of order - 1
+ * repeat until the slot is of the correct order
+ */
+ while (PMEM_ORDER(id, best_fit) > (unsigned char)order) {
+ int buddy;
+ PMEM_ORDER(id, best_fit) -= 1;
+ buddy = PMEM_BUDDY_INDEX(id, best_fit);
+ PMEM_ORDER(id, buddy) = PMEM_ORDER(id, best_fit);
+ }
+ pmem[id].bitmap[best_fit].allocated = 1;
+ return best_fit;
+}
+
+static pgprot_t phys_mem_access_prot(struct file *file, pgprot_t vma_prot)
+{
+ int id = get_id(file);
+#ifdef pgprot_noncached
+ if (pmem[id].cached == 0 || file->f_flags & O_SYNC)
+ return pgprot_noncached(vma_prot);
+#endif
+#ifdef pgprot_ext_buffered
+ else if (pmem[id].buffered)
+ return pgprot_ext_buffered(vma_prot);
+#endif
+ return vma_prot;
+}
+
+static unsigned long pmem_start_addr(int id, struct pmem_data *data)
+{
+ if (pmem[id].no_allocator)
+ return PMEM_START_ADDR(id, 0);
+ else
+ return PMEM_START_ADDR(id, data->index);
+
+}
+
+static void *pmem_start_vaddr(int id, struct pmem_data *data)
+{
+ return pmem_start_addr(id, data) - pmem[id].base + pmem[id].vbase;
+}
+
+static unsigned long pmem_len(int id, struct pmem_data *data)
+{
+ if (pmem[id].no_allocator)
+ return data->index;
+ else
+ return PMEM_LEN(id, data->index);
+}
+
+static int pmem_map_garbage(int id, struct vm_area_struct *vma,
+ struct pmem_data *data, unsigned long offset,
+ unsigned long len)
+{
+ int i, garbage_pages = len >> PAGE_SHIFT;
+
+ vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP | VM_SHARED | VM_WRITE;
+ for (i = 0; i < garbage_pages; i++) {
+ if (vm_insert_pfn(vma, vma->vm_start + offset + (i * PAGE_SIZE),
+ pmem[id].garbage_pfn))
+ return -EAGAIN;
+ }
+ return 0;
+}
+
+static int pmem_unmap_pfn_range(int id, struct vm_area_struct *vma,
+ struct pmem_data *data, unsigned long offset,
+ unsigned long len)
+{
+ int garbage_pages;
+ DLOG("unmap offset %lx len %lx\n", offset, len);
+
+ BUG_ON(!PMEM_IS_PAGE_ALIGNED(len));
+
+ garbage_pages = len >> PAGE_SHIFT;
+ zap_page_range(vma, vma->vm_start + offset, len, NULL);
+ pmem_map_garbage(id, vma, data, offset, len);
+ return 0;
+}
+
+static int pmem_map_pfn_range(int id, struct vm_area_struct *vma,
+ struct pmem_data *data, unsigned long offset,
+ unsigned long len)
+{
+ DLOG("map offset %lx len %lx\n", offset, len);
+ BUG_ON(!PMEM_IS_PAGE_ALIGNED(vma->vm_start));
+ BUG_ON(!PMEM_IS_PAGE_ALIGNED(vma->vm_end));
+ BUG_ON(!PMEM_IS_PAGE_ALIGNED(len));
+ BUG_ON(!PMEM_IS_PAGE_ALIGNED(offset));
+
+ if (io_remap_pfn_range(vma, vma->vm_start + offset,
+ (pmem_start_addr(id, data) + offset) >> PAGE_SHIFT,
+ len, vma->vm_page_prot)) {
+ return -EAGAIN;
+ }
+ return 0;
+}
+
+static int pmem_remap_pfn_range(int id, struct vm_area_struct *vma,
+ struct pmem_data *data, unsigned long offset,
+ unsigned long len)
+{
+ /* hold the mm semp for the vma you are modifying when you call this */
+ BUG_ON(!vma);
+ zap_page_range(vma, vma->vm_start + offset, len, NULL);
+ return pmem_map_pfn_range(id, vma, data, offset, len);
+}
+
+static void pmem_vma_open(struct vm_area_struct *vma)
+{
+ struct file *file = vma->vm_file;
+ struct pmem_data *data = file->private_data;
+ int id = get_id(file);
+ /* this should never be called as we don't support copying pmem
+ * ranges via fork */
+ BUG_ON(!has_allocation(file));
+ down_write(&data->sem);
+ /* remap the garbage pages, forkers don't get access to the data */
+ pmem_unmap_pfn_range(id, vma, data, 0, vma->vm_start - vma->vm_end);
+ up_write(&data->sem);
+}
+
+static void pmem_vma_close(struct vm_area_struct *vma)
+{
+ struct file *file = vma->vm_file;
+ struct pmem_data *data = file->private_data;
+
+ DLOG("current %u ppid %u file %p count %d\n", current->pid,
+ current->parent->pid, file, file_count(file));
+ if (unlikely(!is_pmem_file(file) || !has_allocation(file))) {
+ printk(KERN_WARNING "pmem: something is very wrong, you are "
+ "closing a vm backing an allocation that doesn't "
+ "exist!\n");
+ return;
+ }
+ down_write(&data->sem);
+ if (data->vma == vma) {
+ data->vma = NULL;
+ if ((data->flags & PMEM_FLAGS_CONNECTED) &&
+ (data->flags & PMEM_FLAGS_SUBMAP))
+ data->flags |= PMEM_FLAGS_UNSUBMAP;
+ }
+ /* the kernel is going to free this vma now anyway */
+ up_write(&data->sem);
+}
+
+static struct vm_operations_struct vm_ops = {
+ .open = pmem_vma_open,
+ .close = pmem_vma_close,
+};
+
+static int pmem_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct pmem_data *data;
+ int index;
+ unsigned long vma_size = vma->vm_end - vma->vm_start;
+ int ret = 0, id = get_id(file);
+
+ if (vma->vm_pgoff || !PMEM_IS_PAGE_ALIGNED(vma_size)) {
+#if PMEM_DEBUG
+ printk(KERN_ERR "pmem: mmaps must be at offset zero, aligned"
+ " and a multiple of pages_size.\n");
+#endif
+ return -EINVAL;
+ }
+
+ data = (struct pmem_data *)file->private_data;
+ down_write(&data->sem);
+ /* check this file isn't already mmaped, for submaps check this file
+ * has never been mmaped */
+ if ((data->flags & PMEM_FLAGS_MASTERMAP) ||
+ (data->flags & PMEM_FLAGS_SUBMAP) ||
+ (data->flags & PMEM_FLAGS_UNSUBMAP)) {
+#if PMEM_DEBUG
+ printk(KERN_ERR "pmem: you can only mmap a pmem file once, "
+ "this file is already mmaped. %x\n", data->flags);
+#endif
+ ret = -EINVAL;
+ goto error;
+ }
+ /* if file->private_data == unalloced, alloc*/
+ if (data && data->index == -1) {
+ down_write(&pmem[id].bitmap_sem);
+ index = pmem_allocate(id, vma->vm_end - vma->vm_start);
+ up_write(&pmem[id].bitmap_sem);
+ data->index = index;
+ }
+ /* either no space was available or an error occured */
+ if (!has_allocation(file)) {
+ ret = -EINVAL;
+ printk("pmem: could not find allocation for map.\n");
+ goto error;
+ }
+
+ if (pmem_len(id, data) < vma_size) {
+#if PMEM_DEBUG
+ printk(KERN_WARNING "pmem: mmap size [%lu] does not match"
+ "size of backing region [%lu].\n", vma_size,
+ pmem_len(id, data));
+#endif
+ ret = -EINVAL;
+ goto error;
+ }
+
+ vma->vm_pgoff = pmem_start_addr(id, data) >> PAGE_SHIFT;
+ vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_page_prot);
+
+ if (data->flags & PMEM_FLAGS_CONNECTED) {
+ struct pmem_region_node *region_node;
+ struct list_head *elt;
+ if (pmem_map_garbage(id, vma, data, 0, vma_size)) {
+ printk("pmem: mmap failed in kernel!\n");
+ ret = -EAGAIN;
+ goto error;
+ }
+ list_for_each(elt, &data->region_list) {
+ region_node = list_entry(elt, struct pmem_region_node,
+ list);
+ DLOG("remapping file: %p %lx %lx\n", file,
+ region_node->region.offset,
+ region_node->region.len);
+ if (pmem_remap_pfn_range(id, vma, data,
+ region_node->region.offset,
+ region_node->region.len)) {
+ ret = -EAGAIN;
+ goto error;
+ }
+ }
+ data->flags |= PMEM_FLAGS_SUBMAP;
+ get_task_struct(current->group_leader);
+ data->task = current->group_leader;
+ data->vma = vma;
+#if PMEM_DEBUG
+ data->pid = current->pid;
+#endif
+ DLOG("submmapped file %p vma %p pid %u\n", file, vma,
+ current->pid);
+ } else {
+ if (pmem_map_pfn_range(id, vma, data, 0, vma_size)) {
+ printk(KERN_INFO "pmem: mmap failed in kernel!\n");
+ ret = -EAGAIN;
+ goto error;
+ }
+ data->flags |= PMEM_FLAGS_MASTERMAP;
+ data->pid = current->pid;
+ }
+ vma->vm_ops = &vm_ops;
+error:
+ up_write(&data->sem);
+ return ret;
+}
+
+/* the following are the api for accessing pmem regions by other drivers
+ * from inside the kernel */
+int get_pmem_user_addr(struct file *file, unsigned long *start,
+ unsigned long *len)
+{
+ struct pmem_data *data;
+ if (!is_pmem_file(file) || !has_allocation(file)) {
+#if PMEM_DEBUG
+ printk(KERN_INFO "pmem: requested pmem data from invalid"
+ "file.\n");
+#endif
+ return -1;
+ }
+ data = (struct pmem_data *)file->private_data;
+ down_read(&data->sem);
+ if (data->vma) {
+ *start = data->vma->vm_start;
+ *len = data->vma->vm_end - data->vma->vm_start;
+ } else {
+ *start = 0;
+ *len = 0;
+ }
+ up_read(&data->sem);
+ return 0;
+}
+
+int get_pmem_addr(struct file *file, unsigned long *start,
+ unsigned long *vstart, unsigned long *len)
+{
+ struct pmem_data *data;
+ int id;
+
+ if (!is_pmem_file(file) || !has_allocation(file)) {
+ return -1;
+ }
+
+ data = (struct pmem_data *)file->private_data;
+ if (data->index == -1) {
+#if PMEM_DEBUG
+ printk(KERN_INFO "pmem: requested pmem data from file with no "
+ "allocation.\n");
+ return -1;
+#endif
+ }
+ id = get_id(file);
+
+ down_read(&data->sem);
+ *start = pmem_start_addr(id, data);
+ *len = pmem_len(id, data);
+ *vstart = (unsigned long)pmem_start_vaddr(id, data);
+ up_read(&data->sem);
+#if PMEM_DEBUG
+ down_write(&data->sem);
+ data->ref++;
+ up_write(&data->sem);
+#endif
+ return 0;
+}
+
+int get_pmem_file(int fd, unsigned long *start, unsigned long *vstart,
+ unsigned long *len, struct file **filp)
+{
+ struct file *file;
+
+ file = fget(fd);
+ if (unlikely(file == NULL)) {
+ printk(KERN_INFO "pmem: requested data from file descriptor "
+ "that doesn't exist.");
+ return -1;
+ }
+
+ if (get_pmem_addr(file, start, vstart, len))
+ goto end;
+
+ if (filp)
+ *filp = file;
+ return 0;
+end:
+ fput(file);
+ return -1;
+}
+
+EXPORT_SYMBOL(get_pmem_file);
+
+void put_pmem_file(struct file *file)
+{
+ struct pmem_data *data;
+ int id;
+
+ if (!is_pmem_file(file))
+ return;
+ id = get_id(file);
+ data = (struct pmem_data *)file->private_data;
+#if PMEM_DEBUG
+ down_write(&data->sem);
+ if (data->ref == 0) {
+ printk("pmem: pmem_put > pmem_get %s (pid %d)\n",
+ pmem[id].dev.name, data->pid);
+ BUG();
+ }
+ data->ref--;
+ up_write(&data->sem);
+#endif
+ fput(file);
+}
+
+void flush_pmem_file(struct file *file, unsigned long offset, unsigned long len)
+{
+ struct pmem_data *data;
+ int id;
+ void *vaddr;
+ struct pmem_region_node *region_node;
+ struct list_head *elt;
+ void *flush_start, *flush_end;
+
+ if (!is_pmem_file(file) || !has_allocation(file)) {
+ return;
+ }
+
+ id = get_id(file);
+ data = (struct pmem_data *)file->private_data;
+ if (!pmem[id].cached)
+ return;
+
+ down_read(&data->sem);
+ vaddr = pmem_start_vaddr(id, data);
+ /* if this isn't a submmapped file, flush the whole thing */
+ if (unlikely(!(data->flags & PMEM_FLAGS_CONNECTED))) {
+#if 0
+ dmac_flush_range(vaddr, vaddr + pmem_len(id, data));
+#else
+ dma_cache_wback_inv((u32)vaddr, pmem_len(id, data));
+#endif
+ goto end;
+ }
+ /* otherwise, flush the region of the file we are drawing */
+ list_for_each(elt, &data->region_list) {
+ region_node = list_entry(elt, struct pmem_region_node, list);
+ if ((offset >= region_node->region.offset) &&
+ ((offset + len) <= (region_node->region.offset +
+ region_node->region.len))) {
+ flush_start = vaddr + region_node->region.offset;
+ flush_end = flush_start + region_node->region.len;
+#if 0
+ dmac_flush_range(flush_start, flush_end);
+#else
+ dma_cache_wback_inv((u32)flush_start, region_node->region.len);
+#endif
+ break;
+ }
+ }
+end:
+ up_read(&data->sem);
+}
+
+static int pmem_connect(unsigned long connect, struct file *file)
+{
+ struct pmem_data *data = (struct pmem_data *)file->private_data;
+ struct pmem_data *src_data;
+ struct file *src_file;
+ int ret = 0, put_needed;
+
+ down_write(&data->sem);
+ /* retrieve the src file and check it is a pmem file with an alloc */
+ src_file = fget_light(connect, &put_needed);
+ DLOG("connect %p to %p\n", file, src_file);
+ if (!src_file) {
+ printk("pmem: src file not found!\n");
+ ret = -EINVAL;
+ goto err_no_file;
+ }
+ if (unlikely(!is_pmem_file(src_file) || !has_allocation(src_file))) {
+ printk(KERN_INFO "pmem: src file is not a pmem file or has no "
+ "alloc!\n");
+ ret = -EINVAL;
+ goto err_bad_file;
+ }
+ src_data = (struct pmem_data *)src_file->private_data;
+
+ if (has_allocation(file) && (data->index != src_data->index)) {
+ printk("pmem: file is already mapped but doesn't match this"
+ " src_file!\n");
+ ret = -EINVAL;
+ goto err_bad_file;
+ }
+ data->index = src_data->index;
+ data->flags |= PMEM_FLAGS_CONNECTED;
+ data->master_fd = connect;
+ data->master_file = src_file;
+
+err_bad_file:
+ fput_light(src_file, put_needed);
+err_no_file:
+ up_write(&data->sem);
+ return ret;
+}
+
+static void pmem_unlock_data_and_mm(struct pmem_data *data,
+ struct mm_struct *mm)
+{
+ up_write(&data->sem);
+ if (mm != NULL) {
+ up_write(&mm->mmap_sem);
+ mmput(mm);
+ }
+}
+
+static int pmem_lock_data_and_mm(struct file *file, struct pmem_data *data,
+ struct mm_struct **locked_mm)
+{
+ int ret = 0;
+ struct mm_struct *mm = NULL;
+ *locked_mm = NULL;
+lock_mm:
+ down_read(&data->sem);
+ if (PMEM_IS_SUBMAP(data)) {
+ mm = get_task_mm(data->task);
+ if (!mm) {
+#if PMEM_DEBUG
+ printk("pmem: can't remap task is gone!\n");
+#endif
+ up_read(&data->sem);
+ return -1;
+ }
+ }
+ up_read(&data->sem);
+
+ if (mm)
+ down_write(&mm->mmap_sem);
+
+ down_write(&data->sem);
+ /* check that the file didn't get mmaped before we could take the
+ * data sem, this should be safe b/c you can only submap each file
+ * once */
+ if (PMEM_IS_SUBMAP(data) && !mm) {
+ pmem_unlock_data_and_mm(data, mm);
+ up_write(&data->sem);
+ goto lock_mm;
+ }
+ /* now check that vma.mm is still there, it could have been
+ * deleted by vma_close before we could get the data->sem */
+ if ((data->flags & PMEM_FLAGS_UNSUBMAP) && (mm != NULL)) {
+ /* might as well release this */
+ if (data->flags & PMEM_FLAGS_SUBMAP) {
+ put_task_struct(data->task);
+ data->task = NULL;
+ /* lower the submap flag to show the mm is gone */
+ data->flags &= ~(PMEM_FLAGS_SUBMAP);
+ }
+ pmem_unlock_data_and_mm(data, mm);
+ return -1;
+ }
+ *locked_mm = mm;
+ return ret;
+}
+
+int pmem_remap(struct pmem_region *region, struct file *file,
+ unsigned operation)
+{
+ int ret;
+ struct pmem_region_node *region_node;
+ struct mm_struct *mm = NULL;
+ struct list_head *elt, *elt2;
+ int id = get_id(file);
+ struct pmem_data *data = (struct pmem_data *)file->private_data;
+
+ /* pmem region must be aligned on a page boundry */
+ if (unlikely(!PMEM_IS_PAGE_ALIGNED(region->offset) ||
+ !PMEM_IS_PAGE_ALIGNED(region->len))) {
+#if PMEM_DEBUG
+ printk("pmem: request for unaligned pmem suballocation "
+ "%lx %lx\n", region->offset, region->len);
+#endif
+ return -EINVAL;
+ }
+
+ /* if userspace requests a region of len 0, there's nothing to do */
+ if (region->len == 0)
+ return 0;
+
+ /* lock the mm and data */
+ ret = pmem_lock_data_and_mm(file, data, &mm);
+ if (ret)
+ return 0;
+
+ /* only the owner of the master file can remap the client fds
+ * that back in it */
+ if (!is_master_owner(file)) {
+#if PMEM_DEBUG
+ printk("pmem: remap requested from non-master process\n");
+#endif
+ ret = -EINVAL;
+ goto err;
+ }
+
+ /* check that the requested range is within the src allocation */
+ if (unlikely((region->offset > pmem_len(id, data)) ||
+ (region->len > pmem_len(id, data)) ||
+ (region->offset + region->len > pmem_len(id, data)))) {
+#if PMEM_DEBUG
+ printk(KERN_INFO "pmem: suballoc doesn't fit in src_file!\n");
+#endif
+ ret = -EINVAL;
+ goto err;
+ }
+
+ if (operation == PMEM_MAP) {
+ region_node = kmalloc(sizeof(struct pmem_region_node),
+ GFP_KERNEL);
+ if (!region_node) {
+ ret = -ENOMEM;
+#if PMEM_DEBUG
+ printk(KERN_INFO "No space to allocate metadata!");
+#endif
+ goto err;
+ }
+ region_node->region = *region;
+ list_add(&region_node->list, &data->region_list);
+ } else if (operation == PMEM_UNMAP) {
+ int found = 0;
+ list_for_each_safe(elt, elt2, &data->region_list) {
+ region_node = list_entry(elt, struct pmem_region_node,
+ list);
+ if (region->len == 0 ||
+ (region_node->region.offset == region->offset &&
+ region_node->region.len == region->len)) {
+ list_del(elt);
+ kfree(region_node);
+ found = 1;
+ }
+ }
+ if (!found) {
+#if PMEM_DEBUG
+ printk("pmem: Unmap region does not map any mapped "
+ "region!");
+#endif
+ ret = -EINVAL;
+ goto err;
+ }
+ }
+
+ if (data->vma && PMEM_IS_SUBMAP(data)) {
+ if (operation == PMEM_MAP)
+ ret = pmem_remap_pfn_range(id, data->vma, data,
+ region->offset, region->len);
+ else if (operation == PMEM_UNMAP)
+ ret = pmem_unmap_pfn_range(id, data->vma, data,
+ region->offset, region->len);
+ }
+
+err:
+ pmem_unlock_data_and_mm(data, mm);
+ return ret;
+}
+
+static void pmem_revoke(struct file *file, struct pmem_data *data)
+{
+ struct pmem_region_node *region_node;
+ struct list_head *elt, *elt2;
+ struct mm_struct *mm = NULL;
+ int id = get_id(file);
+ int ret = 0;
+
+ data->master_file = NULL;
+ ret = pmem_lock_data_and_mm(file, data, &mm);
+ /* if lock_data_and_mm fails either the task that mapped the fd, or
+ * the vma that mapped it have already gone away, nothing more
+ * needs to be done */
+ if (ret)
+ return;
+ /* unmap everything */
+ /* delete the regions and region list nothing is mapped any more */
+ if (data->vma)
+ list_for_each_safe(elt, elt2, &data->region_list) {
+ region_node = list_entry(elt, struct pmem_region_node,
+ list);
+ pmem_unmap_pfn_range(id, data->vma, data,
+ region_node->region.offset,
+ region_node->region.len);
+ list_del(elt);
+ kfree(region_node);
+ }
+ /* delete the master file */
+ pmem_unlock_data_and_mm(data, mm);
+}
+
+static void pmem_get_size(struct pmem_region *region, struct file *file)
+{
+ struct pmem_data *data = (struct pmem_data *)file->private_data;
+ int id = get_id(file);
+
+ if (!has_allocation(file)) {
+ region->offset = 0;
+ region->len = 0;
+ return;
+ } else {
+ region->offset = pmem_start_addr(id, data);
+ region->len = pmem_len(id, data);
+ }
+ DLOG("offset %lx len %lx\n", region->offset, region->len);
+}
+
+
+static long pmem_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct pmem_data *data;
+ int id = get_id(file);
+
+ switch (cmd) {
+ case PMEM_GET_PHYS:
+ {
+ struct pmem_region region;
+ DLOG("get_phys\n");
+ if (!has_allocation(file)) {
+ region.offset = 0;
+ region.len = 0;
+ } else {
+ data = (struct pmem_data *)file->private_data;
+ region.offset = pmem_start_addr(id, data);
+ region.len = pmem_len(id, data);
+ }
+ /* printk(KERN_INFO "pmem: request for physical address of pmem region "
+ "from process %d.\n", current->pid); */
+ if (copy_to_user((void __user *)arg, &region,
+ sizeof(struct pmem_region)))
+ return -EFAULT;
+ break;
+ }
+ case PMEM_MAP:
+ {
+ struct pmem_region region;
+ if (copy_from_user(&region, (void __user *)arg,
+ sizeof(struct pmem_region)))
+ return -EFAULT;
+ data = (struct pmem_data *)file->private_data;
+ return pmem_remap(&region, file, PMEM_MAP);
+ }
+ break;
+ case PMEM_UNMAP:
+ {
+ struct pmem_region region;
+ if (copy_from_user(&region, (void __user *)arg,
+ sizeof(struct pmem_region)))
+ return -EFAULT;
+ data = (struct pmem_data *)file->private_data;
+ return pmem_remap(&region, file, PMEM_UNMAP);
+ break;
+ }
+ case PMEM_GET_SIZE:
+ {
+ struct pmem_region region;
+ DLOG("get_size\n");
+ pmem_get_size(&region, file);
+ if (copy_to_user((void __user *)arg, &region,
+ sizeof(struct pmem_region)))
+ return -EFAULT;
+ break;
+ }
+ case PMEM_GET_TOTAL_SIZE:
+ {
+ struct pmem_region region;
+ DLOG("get total size\n");
+ region.offset = 0;
+ get_id(file);
+ region.len = pmem[id].size;
+ if (copy_to_user((void __user *)arg, &region,
+ sizeof(struct pmem_region)))
+ return -EFAULT;
+ break;
+ }
+ case PMEM_ALLOCATE:
+ {
+ if (has_allocation(file))
+ return -EINVAL;
+ data = (struct pmem_data *)file->private_data;
+ data->index = pmem_allocate(id, arg);
+ break;
+ }
+ case PMEM_CONNECT:
+ DLOG("connect\n");
+ return pmem_connect(arg, file);
+ break;
+ default:
+ if (pmem[id].ioctl)
+ return pmem[id].ioctl(file, cmd, arg);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+#if PMEM_DEBUG
+static ssize_t debug_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+static ssize_t debug_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct list_head *elt, *elt2;
+ struct pmem_data *data;
+ struct pmem_region_node *region_node;
+ int id = (int)file->private_data;
+ const int debug_bufmax = 4096;
+ static char buffer[4096];
+ int n = 0;
+
+ DLOG("debug open\n");
+ n = scnprintf(buffer, debug_bufmax,
+ "pid #: mapped regions (offset, len) (offset,len)...\n");
+
+ down(&pmem[id].data_list_sem);
+ list_for_each(elt, &pmem[id].data_list) {
+ data = list_entry(elt, struct pmem_data, list);
+ down_read(&data->sem);
+ n += scnprintf(buffer + n, debug_bufmax - n, "pid %u:",
+ data->pid);
+ list_for_each(elt2, &data->region_list) {
+ region_node = list_entry(elt2, struct pmem_region_node,
+ list);
+ n += scnprintf(buffer + n, debug_bufmax - n,
+ "(%lx,%lx) ",
+ region_node->region.offset,
+ region_node->region.len);
+ }
+ n += scnprintf(buffer + n, debug_bufmax - n, "\n");
+ up_read(&data->sem);
+ }
+ up(&pmem[id].data_list_sem);
+
+ n++;
+ buffer[n] = 0;
+ return simple_read_from_buffer(buf, count, ppos, buffer, n);
+}
+
+static struct file_operations debug_fops = {
+ .read = debug_read,
+ .open = debug_open,
+};
+#endif
+
+#if 0
+static struct miscdevice pmem_dev = {
+ .name = "pmem",
+ .fops = &pmem_fops,
+};
+#endif
+
+int pmem_setup(struct android_pmem_platform_data *pdata,
+ long (*ioctl)(struct file *, unsigned int, unsigned long),
+ int (*release)(struct inode *, struct file *))
+{
+ int err = 0;
+ int i, index = 0;
+ int id = id_count;
+ id_count++;
+
+ pmem[id].no_allocator = pdata->no_allocator;
+ pmem[id].cached = pdata->cached;
+ pmem[id].buffered = pdata->buffered;
+ pmem[id].base = pdata->start;
+ pmem[id].size = pdata->size;
+ pmem[id].ioctl = ioctl;
+ pmem[id].release = release;
+ init_rwsem(&pmem[id].bitmap_sem);
+ sema_init(&pmem[id].data_list_sem, 0);
+ INIT_LIST_HEAD(&pmem[id].data_list);
+ pmem[id].dev.name = pdata->name;
+ pmem[id].dev.minor = id;
+ pmem[id].dev.fops = &pmem_fops;
+ printk(KERN_INFO "%s: %d init\n", pdata->name, pdata->cached);
+
+ err = misc_register(&pmem[id].dev);
+ if (err) {
+ printk(KERN_ALERT "Unable to register pmem driver!\n");
+ goto err_cant_register_device;
+ }
+ pmem[id].num_entries = pmem[id].size / PMEM_MIN_ALLOC;
+
+ pmem[id].bitmap = kmalloc(pmem[id].num_entries *
+ sizeof(struct pmem_bits), GFP_KERNEL);
+ if (!pmem[id].bitmap)
+ goto err_no_mem_for_metadata;
+
+ memset(pmem[id].bitmap, 0, sizeof(struct pmem_bits) *
+ pmem[id].num_entries);
+
+ for (i = sizeof(pmem[id].num_entries) * 8 - 1; i >= 0; i--) {
+ if ((pmem[id].num_entries) & 1<<i) {
+ PMEM_ORDER(id, index) = i;
+ index = PMEM_NEXT_INDEX(id, index);
+ }
+ }
+
+ if (pmem[id].cached)
+ pmem[id].vbase = ioremap_cached(pmem[id].base,
+ pmem[id].size);
+#ifdef ioremap_ext_buffered
+ else if (pmem[id].buffered)
+ pmem[id].vbase = ioremap_ext_buffered(pmem[id].base,
+ pmem[id].size);
+#endif
+ else
+ pmem[id].vbase = ioremap(pmem[id].base, pmem[id].size);
+
+ if (pmem[id].vbase == 0)
+ goto error_cant_remap;
+
+ pmem[id].garbage_pfn = page_to_pfn(alloc_page(GFP_KERNEL));
+ if (pmem[id].no_allocator)
+ pmem[id].allocated = 0;
+
+#if PMEM_DEBUG
+ debugfs_create_file(pdata->name, S_IFREG | S_IRUGO, NULL, (void *)id,
+ &debug_fops);
+#endif
+ return 0;
+error_cant_remap:
+ kfree(pmem[id].bitmap);
+err_no_mem_for_metadata:
+ misc_deregister(&pmem[id].dev);
+err_cant_register_device:
+ return -1;
+}
+
+static int pmem_probe(struct platform_device *pdev)
+{
+ struct android_pmem_platform_data *pdata;
+
+ if (!pdev || !pdev->dev.platform_data) {
+ printk(KERN_ALERT "Unable to probe pmem!\n");
+ return -1;
+ }
+ pdata = pdev->dev.platform_data;
+ return pmem_setup(pdata, NULL, NULL);
+}
+
+
+static int pmem_remove(struct platform_device *pdev)
+{
+ int id = pdev->id;
+ __free_page(pfn_to_page(pmem[id].garbage_pfn));
+ misc_deregister(&pmem[id].dev);
+ return 0;
+}
+
+static struct platform_driver pmem_driver = {
+ .probe = pmem_probe,
+ .remove = pmem_remove,
+ .driver = { .name = "android_pmem" }
+};
+
+
+static int __init pmem_init(void)
+{
+ return platform_driver_register(&pmem_driver);
+}
+
+static void __exit pmem_exit(void)
+{
+ platform_driver_unregister(&pmem_driver);
+}
+
+module_init(pmem_init);
+module_exit(pmem_exit);
+
diff --git a/stblinux-2.6.37/drivers/misc/pmem_rua.c b/stblinux-2.6.37/drivers/misc/pmem_rua.c
new file mode 100644
index 0000000..4078910
--- /dev/null
+++ b/stblinux-2.6.37/drivers/misc/pmem_rua.c
@@ -0,0 +1,85 @@
+/* drivers/android/pmem.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/miscdevice.h>
+#include <linux/platform_device.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/mm.h>
+#include <linux/list.h>
+#include <linux/debugfs.h>
+#include <linux/android_pmem.h>
+#include <linux/mempolicy.h>
+#include <linux/sched.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/cacheflush.h>
+
+MODULE_DESCRIPTION("SMP86xx RUA PMEM Device");
+MODULE_AUTHOR("Benoit Goby <benoit_goby@sdesigns.com>");
+MODULE_LICENSE("GPL");
+
+static unsigned int address = 0;
+MODULE_PARM_DESC(address, "Buffer Address");
+module_param(address, int, 0);
+
+static unsigned int size = 0;
+MODULE_PARM_DESC(size, "Buffer Size");
+module_param(size, int, 0);
+
+static struct android_pmem_platform_data android_pmem_pdata = {
+ .name = "pmem",
+ .start = 0,
+ .size = 0,
+ .no_allocator = 1,
+ .cached = 0,
+};
+
+static struct platform_device android_pmem_device = {
+ .name = "android_pmem",
+ .id = 0,
+ .dev = { .platform_data = &android_pmem_pdata },
+};
+
+static struct platform_device *devices[] __initdata = {
+ &android_pmem_device,
+};
+
+static int __init pmem_rua_init(void)
+{
+ if (!size) {
+ printk(KERN_INFO "size can't be null\n");
+ }
+
+ if (!address) {
+ printk(KERN_INFO "address can't be null\n");
+ }
+
+ android_pmem_pdata.start = address & (1-PAGE_SIZE);
+ android_pmem_pdata.size = size - PAGE_SIZE;
+
+ platform_add_devices(devices, ARRAY_SIZE(devices));
+ printk(KERN_INFO "pmem_rua_init start %08lx size %08lx\n", android_pmem_pdata.start, android_pmem_pdata.size);
+ return 0;
+}
+
+static void __exit pmem_rua_exit(void)
+{
+ printk(KERN_INFO "pmem_rua_exit\n");
+}
+
+module_init(pmem_rua_init);
+module_exit(pmem_rua_exit);
+
diff --git a/stblinux-2.6.37/drivers/misc/uid_stat.c b/stblinux-2.6.37/drivers/misc/uid_stat.c
new file mode 100644
index 0000000..43a548b
--- /dev/null
+++ b/stblinux-2.6.37/drivers/misc/uid_stat.c
@@ -0,0 +1,153 @@
+/* drivers/misc/uid_stat.c
+ *
+ * Copyright (C) 2008 - 2009 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <asm/atomic.h>
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/proc_fs.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/stat.h>
+#include <linux/uid_stat.h>
+
+static DEFINE_SPINLOCK(uid_lock);
+static LIST_HEAD(uid_list);
+static struct proc_dir_entry *parent;
+
+struct uid_stat {
+ struct list_head link;
+ uid_t uid;
+ atomic_t tcp_rcv;
+ atomic_t tcp_snd;
+};
+
+static struct uid_stat *find_uid_stat(uid_t uid) {
+ unsigned long flags;
+ struct uid_stat *entry;
+
+ spin_lock_irqsave(&uid_lock, flags);
+ list_for_each_entry(entry, &uid_list, link) {
+ if (entry->uid == uid) {
+ spin_unlock_irqrestore(&uid_lock, flags);
+ return entry;
+ }
+ }
+ spin_unlock_irqrestore(&uid_lock, flags);
+ return NULL;
+}
+
+static int tcp_snd_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len;
+ unsigned int bytes;
+ char *p = page;
+ struct uid_stat *uid_entry = (struct uid_stat *) data;
+ if (!data)
+ return 0;
+
+ bytes = (unsigned int) (atomic_read(&uid_entry->tcp_snd) + INT_MIN);
+ p += sprintf(p, "%u\n", bytes);
+ len = (p - page) - off;
+ *eof = (len <= count) ? 1 : 0;
+ *start = page + off;
+ return len;
+}
+
+static int tcp_rcv_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len;
+ unsigned int bytes;
+ char *p = page;
+ struct uid_stat *uid_entry = (struct uid_stat *) data;
+ if (!data)
+ return 0;
+
+ bytes = (unsigned int) (atomic_read(&uid_entry->tcp_rcv) + INT_MIN);
+ p += sprintf(p, "%u\n", bytes);
+ len = (p - page) - off;
+ *eof = (len <= count) ? 1 : 0;
+ *start = page + off;
+ return len;
+}
+
+/* Create a new entry for tracking the specified uid. */
+static struct uid_stat *create_stat(uid_t uid) {
+ unsigned long flags;
+ char uid_s[32];
+ struct uid_stat *new_uid;
+ struct proc_dir_entry *entry;
+
+ /* Create the uid stat struct and append it to the list. */
+ if ((new_uid = kmalloc(sizeof(struct uid_stat), GFP_KERNEL)) == NULL)
+ return NULL;
+
+ new_uid->uid = uid;
+ /* Counters start at INT_MIN, so we can track 4GB of network traffic. */
+ atomic_set(&new_uid->tcp_rcv, INT_MIN);
+ atomic_set(&new_uid->tcp_snd, INT_MIN);
+
+ spin_lock_irqsave(&uid_lock, flags);
+ list_add_tail(&new_uid->link, &uid_list);
+ spin_unlock_irqrestore(&uid_lock, flags);
+
+ sprintf(uid_s, "%d", uid);
+ entry = proc_mkdir(uid_s, parent);
+
+ /* Keep reference to uid_stat so we know what uid to read stats from. */
+ create_proc_read_entry("tcp_snd", S_IRUGO, entry , tcp_snd_read_proc,
+ (void *) new_uid);
+
+ create_proc_read_entry("tcp_rcv", S_IRUGO, entry, tcp_rcv_read_proc,
+ (void *) new_uid);
+
+ return new_uid;
+}
+
+int update_tcp_snd(uid_t uid, int size) {
+ struct uid_stat *entry;
+ if ((entry = find_uid_stat(uid)) == NULL &&
+ ((entry = create_stat(uid)) == NULL)) {
+ return -1;
+ }
+ atomic_add(size, &entry->tcp_snd);
+ return 0;
+}
+
+int update_tcp_rcv(uid_t uid, int size) {
+ struct uid_stat *entry;
+ if ((entry = find_uid_stat(uid)) == NULL &&
+ ((entry = create_stat(uid)) == NULL)) {
+ return -1;
+ }
+ atomic_add(size, &entry->tcp_rcv);
+ return 0;
+}
+
+static int __init uid_stat_init(void)
+{
+ parent = proc_mkdir("uid_stat", NULL);
+ if (!parent) {
+ pr_err("uid_stat: failed to create proc entry\n");
+ return -1;
+ }
+ return 0;
+}
+
+__initcall(uid_stat_init);
diff --git a/stblinux-2.6.37/drivers/misc/wl127x-rfkill.c b/stblinux-2.6.37/drivers/misc/wl127x-rfkill.c
new file mode 100644
index 0000000..f5b9515
--- /dev/null
+++ b/stblinux-2.6.37/drivers/misc/wl127x-rfkill.c
@@ -0,0 +1,121 @@
+/*
+ * Bluetooth TI wl127x rfkill power control via GPIO
+ *
+ * Copyright (C) 2009 Motorola, Inc.
+ * Copyright (C) 2008 Texas Instruments
+ * Initial code: Pavan Savoy <pavan.savoy@gmail.com> (wl127x_power.c)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/rfkill.h>
+#include <linux/platform_device.h>
+#include <linux/wl127x-rfkill.h>
+
+static int wl127x_rfkill_set_power(void *data, enum rfkill_state state)
+{
+ int nshutdown_gpio = (int) data;
+
+ switch (state) {
+ case RFKILL_STATE_UNBLOCKED:
+ gpio_set_value(nshutdown_gpio, 1);
+ break;
+ case RFKILL_STATE_SOFT_BLOCKED:
+ gpio_set_value(nshutdown_gpio, 0);
+ break;
+ default:
+ printk(KERN_ERR "invalid bluetooth rfkill state %d\n", state);
+ }
+ return 0;
+}
+
+static int wl127x_rfkill_probe(struct platform_device *pdev)
+{
+ int rc = 0;
+ struct wl127x_rfkill_platform_data *pdata = pdev->dev.platform_data;
+ enum rfkill_state default_state = RFKILL_STATE_SOFT_BLOCKED; /* off */
+
+ rc = gpio_request(pdata->nshutdown_gpio, "wl127x_nshutdown_gpio");
+ if (unlikely(rc))
+ return rc;
+
+ rc = gpio_direction_output(pdata->nshutdown_gpio, 0);
+ if (unlikely(rc))
+ return rc;
+
+ rfkill_set_default(RFKILL_TYPE_BLUETOOTH, default_state);
+ wl127x_rfkill_set_power(NULL, default_state);
+
+ pdata->rfkill = rfkill_allocate(&pdev->dev, RFKILL_TYPE_BLUETOOTH);
+ if (unlikely(!pdata->rfkill))
+ return -ENOMEM;
+
+ pdata->rfkill->name = "wl127x";
+ pdata->rfkill->state = default_state;
+ /* userspace cannot take exclusive control */
+ pdata->rfkill->user_claim_unsupported = 1;
+ pdata->rfkill->user_claim = 0;
+ pdata->rfkill->data = (void *) pdata->nshutdown_gpio;
+ pdata->rfkill->toggle_radio = wl127x_rfkill_set_power;
+
+ rc = rfkill_register(pdata->rfkill);
+
+ if (unlikely(rc))
+ rfkill_free(pdata->rfkill);
+
+ return 0;
+}
+
+static int wl127x_rfkill_remove(struct platform_device *pdev)
+{
+ struct wl127x_rfkill_platform_data *pdata = pdev->dev.platform_data;
+
+ rfkill_unregister(pdata->rfkill);
+ rfkill_free(pdata->rfkill);
+ gpio_free(pdata->nshutdown_gpio);
+
+ return 0;
+}
+
+static struct platform_driver wl127x_rfkill_platform_driver = {
+ .probe = wl127x_rfkill_probe,
+ .remove = wl127x_rfkill_remove,
+ .driver = {
+ .name = "wl127x-rfkill",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init wl127x_rfkill_init(void)
+{
+ return platform_driver_register(&wl127x_rfkill_platform_driver);
+}
+
+static void __exit wl127x_rfkill_exit(void)
+{
+ platform_driver_unregister(&wl127x_rfkill_platform_driver);
+}
+
+module_init(wl127x_rfkill_init);
+module_exit(wl127x_rfkill_exit);
+
+MODULE_ALIAS("platform:wl127x");
+MODULE_DESCRIPTION("wl127x-rfkill");
+MODULE_AUTHOR("Motorola");
+MODULE_LICENSE("GPL");
diff --git a/stblinux-2.6.37/drivers/rtc/alarm.c b/stblinux-2.6.37/drivers/rtc/alarm.c
new file mode 100644
index 0000000..9f6134b
--- /dev/null
+++ b/stblinux-2.6.37/drivers/rtc/alarm.c
@@ -0,0 +1,567 @@
+/* drivers/rtc/alarm.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <asm/mach/time.h>
+#include <linux/android_alarm.h>
+#include <linux/device.h>
+#include <linux/miscdevice.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/spinlock.h>
+#include <linux/sysdev.h>
+#include <linux/wakelock.h>
+
+#define ANDROID_ALARM_PRINT_ERRORS (1U << 0)
+#define ANDROID_ALARM_PRINT_INIT_STATUS (1U << 1)
+#define ANDROID_ALARM_PRINT_INFO (1U << 2)
+#define ANDROID_ALARM_PRINT_IO (1U << 3)
+#define ANDROID_ALARM_PRINT_INT (1U << 4)
+#define ANDROID_ALARM_PRINT_FLOW (1U << 5)
+
+#if 0
+#define ANDROID_ALARM_DPRINTF_MASK (~0)
+#define ANDROID_ALARM_DPRINTF(debug_level_mask, args...) \
+ do { \
+ if (ANDROID_ALARM_DPRINTF_MASK & debug_level_mask) { \
+ printk(args); \
+ } \
+ } while (0)
+#else
+#define ANDROID_ALARM_DPRINTF(args...)
+#endif
+
+#define ANDROID_ALARM_WAKEUP_MASK ( \
+ ANDROID_ALARM_RTC_WAKEUP_MASK | \
+ ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK)
+
+/* support old usespace code */
+#define ANDROID_ALARM_SET_OLD _IOW('a', 2, time_t) /* set alarm */
+#define ANDROID_ALARM_SET_AND_WAIT_OLD _IOW('a', 3, time_t)
+
+static struct rtc_device *alarm_rtc_dev;
+static int alarm_opened;
+static DEFINE_SPINLOCK(alarm_slock);
+static DEFINE_MUTEX(alarm_setrtc_mutex);
+static struct wake_lock alarm_wake_lock;
+static struct wake_lock alarm_rtc_wake_lock;
+static DECLARE_WAIT_QUEUE_HEAD(alarm_wait_queue);
+static uint32_t alarm_pending;
+static uint32_t alarm_enabled;
+static uint32_t wait_pending;
+static struct platform_device *alarm_platform_dev;
+static struct hrtimer alarm_timer[ANDROID_ALARM_TYPE_COUNT];
+static struct timespec alarm_time[ANDROID_ALARM_TYPE_COUNT];
+static struct timespec elapsed_rtc_delta;
+
+static void alarm_start_hrtimer(enum android_alarm_type alarm_type)
+{
+ struct timespec hr_alarm_time;
+ if (!(alarm_enabled & (1U << alarm_type)))
+ return;
+ hr_alarm_time = alarm_time[alarm_type];
+ if (alarm_type == ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP ||
+ alarm_type == ANDROID_ALARM_ELAPSED_REALTIME)
+ set_normalized_timespec(&hr_alarm_time,
+ hr_alarm_time.tv_sec + elapsed_rtc_delta.tv_sec,
+ hr_alarm_time.tv_nsec + elapsed_rtc_delta.tv_nsec);
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_FLOW,
+ "alarm start hrtimer %d at %ld.%09ld\n",
+ alarm_type, hr_alarm_time.tv_sec, hr_alarm_time.tv_nsec);
+ hrtimer_start(&alarm_timer[alarm_type],
+ timespec_to_ktime(hr_alarm_time), HRTIMER_MODE_ABS);
+}
+
+static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int rv = 0;
+ unsigned long flags;
+ int i;
+ struct timespec new_alarm_time;
+ struct timespec new_rtc_time;
+ struct timespec tmp_time;
+ struct rtc_time rtc_new_rtc_time;
+ enum android_alarm_type alarm_type = ANDROID_ALARM_IOCTL_TO_TYPE(cmd);
+ uint32_t alarm_type_mask = 1U << alarm_type;
+
+ if (alarm_type >= ANDROID_ALARM_TYPE_COUNT)
+ return -EINVAL;
+
+ if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_GET_TIME(0)) {
+ if ((file->f_flags & O_ACCMODE) == O_RDONLY)
+ return -EPERM;
+ if (file->private_data == NULL &&
+ cmd != ANDROID_ALARM_SET_RTC) {
+ spin_lock_irqsave(&alarm_slock, flags);
+ if (alarm_opened) {
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ return -EBUSY;
+ }
+ alarm_opened = 1;
+ file->private_data = (void *)1;
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ }
+ }
+
+ switch (ANDROID_ALARM_BASE_CMD(cmd)) {
+ case ANDROID_ALARM_CLEAR(0):
+ spin_lock_irqsave(&alarm_slock, flags);
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO,
+ "alarm %d clear\n", alarm_type);
+ hrtimer_try_to_cancel(&alarm_timer[alarm_type]);
+ if (alarm_pending) {
+ alarm_pending &= ~alarm_type_mask;
+ if (!alarm_pending && !wait_pending)
+ wake_unlock(&alarm_wake_lock);
+ }
+ alarm_enabled &= ~alarm_type_mask;
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ break;
+
+ case ANDROID_ALARM_SET_OLD:
+ case ANDROID_ALARM_SET_AND_WAIT_OLD:
+ if (get_user(new_alarm_time.tv_sec, (int __user *)arg)) {
+ rv = -EFAULT;
+ goto err1;
+ }
+ new_alarm_time.tv_nsec = 0;
+ goto from_old_alarm_set;
+
+ case ANDROID_ALARM_SET_AND_WAIT(0):
+ case ANDROID_ALARM_SET(0):
+ if (copy_from_user(&new_alarm_time, (void __user *)arg,
+ sizeof(new_alarm_time))) {
+ rv = -EFAULT;
+ goto err1;
+ }
+from_old_alarm_set:
+ spin_lock_irqsave(&alarm_slock, flags);
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO,
+ "alarm %d set %ld.%09ld\n", alarm_type,
+ new_alarm_time.tv_sec, new_alarm_time.tv_nsec);
+ alarm_time[alarm_type] = new_alarm_time;
+ alarm_enabled |= alarm_type_mask;
+ alarm_start_hrtimer(alarm_type);
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_SET_AND_WAIT(0)
+ && cmd != ANDROID_ALARM_SET_AND_WAIT_OLD)
+ break;
+ /* fall though */
+ case ANDROID_ALARM_WAIT:
+ spin_lock_irqsave(&alarm_slock, flags);
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO, "alarm wait\n");
+ if (!alarm_pending && wait_pending) {
+ wake_unlock(&alarm_wake_lock);
+ wait_pending = 0;
+ }
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ rv = wait_event_interruptible(alarm_wait_queue, alarm_pending);
+ if (rv)
+ goto err1;
+ spin_lock_irqsave(&alarm_slock, flags);
+ rv = alarm_pending;
+ wait_pending = 1;
+ alarm_pending = 0;
+ if (rv & ANDROID_ALARM_WAKEUP_MASK)
+ wake_unlock(&alarm_rtc_wake_lock);
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ break;
+ case ANDROID_ALARM_SET_RTC:
+ if (copy_from_user(&new_rtc_time, (void __user *)arg,
+ sizeof(new_rtc_time))) {
+ rv = -EFAULT;
+ goto err1;
+ }
+ rtc_time_to_tm(new_rtc_time.tv_sec, &rtc_new_rtc_time);
+
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO,
+ "set rtc %ld %ld - rtc %02d:%02d:%02d %02d/%02d/%04d\n",
+ new_rtc_time.tv_sec, new_rtc_time.tv_nsec,
+ rtc_new_rtc_time.tm_hour, rtc_new_rtc_time.tm_min,
+ rtc_new_rtc_time.tm_sec, rtc_new_rtc_time.tm_mon + 1,
+ rtc_new_rtc_time.tm_mday,
+ rtc_new_rtc_time.tm_year + 1900);
+
+ mutex_lock(&alarm_setrtc_mutex);
+ spin_lock_irqsave(&alarm_slock, flags);
+ for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++)
+ hrtimer_try_to_cancel(&alarm_timer[i]);
+ getnstimeofday(&tmp_time);
+ elapsed_rtc_delta = timespec_sub(elapsed_rtc_delta,
+ timespec_sub(tmp_time, new_rtc_time));
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ rv = do_settimeofday(&new_rtc_time);
+ spin_lock_irqsave(&alarm_slock, flags);
+ for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++)
+ alarm_start_hrtimer(i);
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ if (rv < 0) {
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_ERRORS,
+ "Failed to set time\n");
+ mutex_unlock(&alarm_setrtc_mutex);
+ goto err1;
+ }
+ rv = rtc_set_time(alarm_rtc_dev, &rtc_new_rtc_time);
+ spin_lock_irqsave(&alarm_slock, flags);
+ alarm_pending |= ANDROID_ALARM_TIME_CHANGE_MASK;
+ wake_up(&alarm_wait_queue);
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ mutex_unlock(&alarm_setrtc_mutex);
+ if (rv < 0) {
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_ERRORS,
+ "Failed to set RTC, time will be lost on reboot\n");
+ goto err1;
+ }
+ break;
+ case ANDROID_ALARM_GET_TIME(0):
+ mutex_lock(&alarm_setrtc_mutex);
+ spin_lock_irqsave(&alarm_slock, flags);
+ if (alarm_type != ANDROID_ALARM_SYSTEMTIME) {
+ getnstimeofday(&tmp_time);
+ if (alarm_type >= ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP)
+ tmp_time = timespec_sub(tmp_time,
+ elapsed_rtc_delta);
+ } else
+ ktime_get_ts(&tmp_time);
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ mutex_unlock(&alarm_setrtc_mutex);
+ if (copy_to_user((void __user *)arg, &tmp_time,
+ sizeof(tmp_time))) {
+ rv = -EFAULT;
+ goto err1;
+ }
+ break;
+
+ default:
+ rv = -EINVAL;
+ goto err1;
+ }
+err1:
+ return rv;
+}
+
+static int alarm_open(struct inode *inode, struct file *file)
+{
+ file->private_data = NULL;
+ return 0;
+}
+
+static int alarm_release(struct inode *inode, struct file *file)
+{
+ int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&alarm_slock, flags);
+ if (file->private_data != 0) {
+ for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) {
+ uint32_t alarm_type_mask = 1U << i;
+ if (alarm_enabled & alarm_type_mask) {
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
+ "alarm_release: clear alarm, "
+ "pending %d\n",
+ !!(alarm_pending & alarm_type_mask));
+ alarm_enabled &= ~alarm_type_mask;
+ }
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ hrtimer_cancel(&alarm_timer[i]);
+ spin_lock_irqsave(&alarm_slock, flags);
+ }
+ if (alarm_pending | wait_pending) {
+ if (alarm_pending)
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
+ "alarm_release: clear pending alarms "
+ "%x\n", alarm_pending);
+ wake_unlock(&alarm_wake_lock);
+ wait_pending = 0;
+ alarm_pending = 0;
+ }
+ alarm_opened = 0;
+ }
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ return 0;
+}
+
+static enum hrtimer_restart alarm_timer_triggered(struct hrtimer *timer)
+{
+ unsigned long flags;
+ enum android_alarm_type alarm_type = (timer - alarm_timer);
+ uint32_t alarm_type_mask = 1U << alarm_type;
+
+
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INT,
+ "alarm_timer_triggered type %d\n", alarm_type);
+ spin_lock_irqsave(&alarm_slock, flags);
+ if (alarm_enabled & alarm_type_mask) {
+ wake_lock_timeout(&alarm_wake_lock, 5 * HZ);
+ alarm_enabled &= ~alarm_type_mask;
+ alarm_pending |= alarm_type_mask;
+ wake_up(&alarm_wait_queue);
+ }
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ return HRTIMER_NORESTART;
+}
+
+static void alarm_triggered_func(void *p)
+{
+ struct rtc_device *rtc = alarm_rtc_dev;
+ if (!(rtc->irq_data & RTC_AF))
+ return;
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INT, "rtc alarm triggered\n");
+ wake_lock_timeout(&alarm_rtc_wake_lock, 1 * HZ);
+}
+
+int alarm_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ int err = 0;
+ unsigned long flags;
+ struct rtc_wkalrm rtc_alarm;
+ struct rtc_time rtc_current_rtc_time;
+ unsigned long rtc_current_time;
+ unsigned long rtc_alarm_time;
+ struct timespec rtc_current_timespec;
+ struct timespec rtc_delta;
+ struct timespec elapsed_realtime_alarm_time;
+
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_FLOW,
+ "alarm_suspend(%p, %d)\n", pdev, state.event);
+ spin_lock_irqsave(&alarm_slock, flags);
+ if (alarm_pending && !wake_lock_active(&alarm_wake_lock)) {
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
+ "alarm pending\n");
+ err = -EBUSY;
+ goto err1;
+ }
+ if (alarm_enabled & ANDROID_ALARM_WAKEUP_MASK) {
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ if (alarm_enabled & ANDROID_ALARM_RTC_WAKEUP_MASK)
+ hrtimer_cancel(&alarm_timer[ANDROID_ALARM_RTC_WAKEUP]);
+ if (alarm_enabled & ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK)
+ hrtimer_cancel(&alarm_timer[
+ ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP]);
+
+ rtc_read_time(alarm_rtc_dev, &rtc_current_rtc_time);
+ rtc_current_timespec.tv_nsec = 0;
+ rtc_tm_to_time(&rtc_current_rtc_time,
+ &rtc_current_timespec.tv_sec);
+ save_time_delta(&rtc_delta, &rtc_current_timespec);
+ set_normalized_timespec(&elapsed_realtime_alarm_time,
+ alarm_time[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP]
+ .tv_sec + elapsed_rtc_delta.tv_sec,
+ alarm_time[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP]
+ .tv_nsec + elapsed_rtc_delta.tv_nsec);
+ if ((alarm_enabled & ANDROID_ALARM_RTC_WAKEUP_MASK) &&
+ (!(alarm_enabled &
+ ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK) ||
+ timespec_compare(&alarm_time[ANDROID_ALARM_RTC_WAKEUP],
+ &elapsed_realtime_alarm_time) < 0))
+ rtc_alarm_time = timespec_sub(
+ alarm_time[ANDROID_ALARM_RTC_WAKEUP],
+ rtc_delta).tv_sec;
+ else
+ rtc_alarm_time = timespec_sub(
+ elapsed_realtime_alarm_time, rtc_delta).tv_sec;
+ rtc_time_to_tm(rtc_alarm_time, &rtc_alarm.time);
+ rtc_alarm.enabled = 1;
+ rtc_set_alarm(alarm_rtc_dev, &rtc_alarm);
+ rtc_read_time(alarm_rtc_dev, &rtc_current_rtc_time);
+ rtc_tm_to_time(&rtc_current_rtc_time, &rtc_current_time);
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
+ "rtc alarm set at %ld, now %ld, rtc delta %ld.%09ld\n",
+ rtc_alarm_time, rtc_current_time,
+ rtc_delta.tv_sec, rtc_delta.tv_nsec);
+ if (rtc_current_time + 1 >= rtc_alarm_time) {
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
+ "alarm about to go off\n");
+ memset(&rtc_alarm, 0, sizeof(rtc_alarm));
+ rtc_alarm.enabled = 0;
+ rtc_set_alarm(alarm_rtc_dev, &rtc_alarm);
+
+ spin_lock_irqsave(&alarm_slock, flags);
+ wake_lock_timeout(&alarm_rtc_wake_lock, 2 * HZ);
+ alarm_start_hrtimer(ANDROID_ALARM_RTC_WAKEUP);
+ alarm_start_hrtimer(
+ ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP);
+ err = -EBUSY;
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ }
+ } else {
+err1:
+ spin_unlock_irqrestore(&alarm_slock, flags);
+ }
+ return err;
+}
+
+int alarm_resume(struct platform_device *pdev)
+{
+ struct rtc_wkalrm alarm;
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_FLOW,
+ "alarm_resume(%p)\n", pdev);
+ if (alarm_enabled & ANDROID_ALARM_WAKEUP_MASK) {
+ memset(&alarm, 0, sizeof(alarm));
+ alarm.enabled = 0;
+ rtc_set_alarm(alarm_rtc_dev, &alarm);
+ alarm_start_hrtimer(ANDROID_ALARM_RTC_WAKEUP);
+ alarm_start_hrtimer(ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP);
+ }
+ return 0;
+}
+
+static struct rtc_task alarm_rtc_task = {
+ .func = alarm_triggered_func
+};
+
+static struct file_operations alarm_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = alarm_ioctl,
+ .open = alarm_open,
+ .release = alarm_release,
+};
+
+static struct miscdevice alarm_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "alarm",
+ .fops = &alarm_fops,
+};
+
+static int rtc_alarm_add_device(struct device *dev,
+ struct class_interface *class_intf)
+{
+ int err;
+ struct rtc_device *rtc = to_rtc_device(dev);
+
+ mutex_lock(&alarm_setrtc_mutex);
+
+ if (alarm_rtc_dev) {
+ err = -EBUSY;
+ goto err1;
+ }
+
+ err = misc_register(&alarm_device);
+ if (err)
+ goto err1;
+ alarm_platform_dev =
+ platform_device_register_simple("alarm", -1, NULL, 0);
+ if (IS_ERR(alarm_platform_dev)) {
+ err = PTR_ERR(alarm_platform_dev);
+ goto err2;
+ }
+ err = rtc_irq_register(rtc, &alarm_rtc_task);
+ if (err)
+ goto err3;
+ alarm_rtc_dev = rtc;
+ mutex_unlock(&alarm_setrtc_mutex);
+
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO, "alarm: parent %p\n",
+ alarm_platform_dev->dev.power.pm_parent);
+ return 0;
+
+err3:
+ platform_device_unregister(alarm_platform_dev);
+err2:
+ misc_deregister(&alarm_device);
+err1:
+ mutex_unlock(&alarm_setrtc_mutex);
+ return err;
+}
+
+static void rtc_alarm_remove_device(struct device *dev,
+ struct class_interface *class_intf)
+{
+ if (dev == &alarm_rtc_dev->dev) {
+ rtc_irq_unregister(alarm_rtc_dev, &alarm_rtc_task);
+ platform_device_unregister(alarm_platform_dev);
+ misc_deregister(&alarm_device);
+ alarm_rtc_dev = NULL;
+ }
+}
+
+static struct class_interface rtc_alarm_interface = {
+ .add_dev = &rtc_alarm_add_device,
+ .remove_dev = &rtc_alarm_remove_device,
+};
+
+static struct platform_driver alarm_driver = {
+ .suspend = alarm_suspend,
+ .resume = alarm_resume,
+ .driver = {
+ .name = "alarm"
+ }
+};
+
+static int __init alarm_late_init(void)
+{
+ unsigned long flags;
+ struct timespec system_time;
+
+ /* this needs to run after the rtc is read at boot */
+ spin_lock_irqsave(&alarm_slock, flags);
+ /* We read the current rtc and system time so we can later calulate
+ * elasped realtime to be (boot_systemtime + rtc - boot_rtc) ==
+ * (rtc - (boot_rtc - boot_systemtime))
+ */
+ getnstimeofday(&elapsed_rtc_delta);
+ ktime_get_ts(&system_time);
+ elapsed_rtc_delta = timespec_sub(elapsed_rtc_delta, system_time);
+ spin_unlock_irqrestore(&alarm_slock, flags);
+
+ ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
+ "alarm_late_init: rtc to elapsed realtime delta %ld.%09ld\n",
+ elapsed_rtc_delta.tv_sec, elapsed_rtc_delta.tv_nsec);
+ return 0;
+}
+
+static int __init alarm_init(void)
+{
+ int err;
+ int i;
+
+ for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) {
+ hrtimer_init(&alarm_timer[i], CLOCK_REALTIME, HRTIMER_MODE_ABS);
+ alarm_timer[i].function = alarm_timer_triggered;
+ }
+ hrtimer_init(&alarm_timer[ANDROID_ALARM_SYSTEMTIME],
+ CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ alarm_timer[ANDROID_ALARM_SYSTEMTIME].function = alarm_timer_triggered;
+ err = platform_driver_register(&alarm_driver);
+ if (err < 0)
+ goto err1;
+ wake_lock_init(&alarm_wake_lock, WAKE_LOCK_SUSPEND, "alarm");
+ wake_lock_init(&alarm_rtc_wake_lock, WAKE_LOCK_SUSPEND, "alarm_rtc");
+ rtc_alarm_interface.class = rtc_class;
+ err = class_interface_register(&rtc_alarm_interface);
+ if (err < 0)
+ goto err2;
+
+ return 0;
+
+err2:
+ wake_lock_destroy(&alarm_rtc_wake_lock);
+ wake_lock_destroy(&alarm_wake_lock);
+ platform_driver_unregister(&alarm_driver);
+err1:
+ return err;
+}
+
+static void __exit alarm_exit(void)
+{
+ class_interface_unregister(&rtc_alarm_interface);
+ wake_lock_destroy(&alarm_rtc_wake_lock);
+ wake_lock_destroy(&alarm_wake_lock);
+ platform_driver_unregister(&alarm_driver);
+}
+
+late_initcall(alarm_late_init);
+module_init(alarm_init);
+module_exit(alarm_exit);
+
diff --git a/stblinux-2.6.37/drivers/staging/Kconfig b/stblinux-2.6.37/drivers/staging/Kconfig
index 5eafdf4..310c88a 100644
--- a/stblinux-2.6.37/drivers/staging/Kconfig
+++ b/stblinux-2.6.37/drivers/staging/Kconfig
@@ -1,6 +1,6 @@
menuconfig STAGING
bool "Staging drivers"
- default n
+ default y
---help---
This option allows you to select a number of drivers that are
not of the "normal" Linux kernel quality level. These drivers
@@ -22,11 +22,10 @@ menuconfig STAGING
If in doubt, say N here.
-if STAGING
config STAGING_EXCLUDE_BUILD
bool "Exclude Staging drivers from being built" if STAGING
- default y
+ default n
---help---
Are you sure you really want to build the staging drivers?
They taint your kernel, don't live up to the normal Linux
@@ -39,7 +38,6 @@ config STAGING_EXCLUDE_BUILD
when selecting 'make allyesconfg' and 'make allmodconfig' so
don't be all that put off, your dog will be just fine.
-if !STAGING_EXCLUDE_BUILD
source "drivers/staging/et131x/Kconfig"
@@ -87,6 +85,8 @@ source "drivers/staging/rtl8712/Kconfig"
source "drivers/staging/frontier/Kconfig"
+source "drivers/staging/android/Kconfig"
+
source "drivers/staging/pohmelfs/Kconfig"
source "drivers/staging/autofs/Kconfig"
@@ -175,5 +175,3 @@ source "drivers/staging/intel_sst/Kconfig"
source "drivers/staging/speakup/Kconfig"
-endif # !STAGING_EXCLUDE_BUILD
-endif # STAGING
diff --git a/stblinux-2.6.37/drivers/staging/Makefile b/stblinux-2.6.37/drivers/staging/Makefile
index a97a955..3181b14 100644
--- a/stblinux-2.6.37/drivers/staging/Makefile
+++ b/stblinux-2.6.37/drivers/staging/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_RTL8192E) += rtl8192e/
obj-$(CONFIG_R8712U) += rtl8712/
obj-$(CONFIG_SPECTRA) += spectra/
obj-$(CONFIG_TRANZPORT) += frontier/
+obj-$(CONFIG_ANDROID) += android/
obj-$(CONFIG_POHMELFS) += pohmelfs/
obj-$(CONFIG_AUTOFS_FS) += autofs/
obj-$(CONFIG_IDE_PHISON) += phison/
diff --git a/stblinux-2.6.37/drivers/staging/android/Kconfig b/stblinux-2.6.37/drivers/staging/android/Kconfig
new file mode 100644
index 0000000..0d87eb0
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/Kconfig
@@ -0,0 +1,91 @@
+menu "Android"
+
+config ANDROID
+ bool "Android Drivers"
+ default Y
+ ---help---
+ Enable support for various drivers needed on the Android platform
+
+config ANDROID_BINDER_IPC
+ bool "Android Binder IPC Driver"
+ default Y
+
+config ANDROID_LOGGER
+ tristate "Android log driver"
+ default Y
+
+config ANDROID_RAM_CONSOLE
+ bool "Android RAM buffer console"
+ default Y
+
+config ANDROID_RAM_CONSOLE_ENABLE_VERBOSE
+ bool "Enable verbose console messages on Android RAM console"
+ default y
+ depends on ANDROID_RAM_CONSOLE
+
+menuconfig ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+ bool "Android RAM Console Enable error correction"
+ default n
+ depends on ANDROID_RAM_CONSOLE
+ depends on !ANDROID_RAM_CONSOLE_EARLY_INIT
+ select REED_SOLOMON
+ select REED_SOLOMON_ENC8
+ select REED_SOLOMON_DEC8
+
+if ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+
+config ANDROID_RAM_CONSOLE_ERROR_CORRECTION_DATA_SIZE
+ int "Android RAM Console Data data size"
+ default 128
+ help
+ Must be a power of 2.
+
+config ANDROID_RAM_CONSOLE_ERROR_CORRECTION_ECC_SIZE
+ int "Android RAM Console ECC size"
+ default 16
+
+config ANDROID_RAM_CONSOLE_ERROR_CORRECTION_SYMBOL_SIZE
+ int "Android RAM Console Symbol size"
+ default 8
+
+config ANDROID_RAM_CONSOLE_ERROR_CORRECTION_POLYNOMIAL
+ hex "Android RAM Console Polynomial"
+ default 0x19 if (ANDROID_RAM_CONSOLE_ERROR_CORRECTION_SYMBOL_SIZE = 4)
+ default 0x29 if (ANDROID_RAM_CONSOLE_ERROR_CORRECTION_SYMBOL_SIZE = 5)
+ default 0x61 if (ANDROID_RAM_CONSOLE_ERROR_CORRECTION_SYMBOL_SIZE = 6)
+ default 0x89 if (ANDROID_RAM_CONSOLE_ERROR_CORRECTION_SYMBOL_SIZE = 7)
+ default 0x11d if (ANDROID_RAM_CONSOLE_ERROR_CORRECTION_SYMBOL_SIZE = 8)
+
+endif # ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+
+config ANDROID_RAM_CONSOLE_EARLY_INIT
+ bool "Start Android RAM console early"
+ default n
+ depends on ANDROID_RAM_CONSOLE
+
+config ANDROID_RAM_CONSOLE_EARLY_ADDR
+ hex "Android RAM console virtual address"
+ default 0
+ depends on ANDROID_RAM_CONSOLE_EARLY_INIT
+
+config ANDROID_RAM_CONSOLE_EARLY_SIZE
+ hex "Android RAM console buffer size"
+ default 0
+ depends on ANDROID_RAM_CONSOLE_EARLY_INIT
+
+config ANDROID_TIMED_OUTPUT
+ bool "Timed output class driver"
+ default y
+
+config ANDROID_TIMED_GPIO
+ tristate "Android timed gpio driver"
+ depends on GENERIC_GPIO && ANDROID_TIMED_OUTPUT
+ default n
+
+config ANDROID_LOW_MEMORY_KILLER
+ bool "Android Low Memory Killer"
+ default N
+ ---help---
+ Register processes to be killed when memory is low
+
+endmenu
diff --git a/stblinux-2.6.37/drivers/staging/android/Makefile b/stblinux-2.6.37/drivers/staging/android/Makefile
new file mode 100644
index 0000000..8e057e6
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/Makefile
@@ -0,0 +1,6 @@
+obj-$(CONFIG_ANDROID_BINDER_IPC) += binder.o
+obj-$(CONFIG_ANDROID_LOGGER) += logger.o
+obj-$(CONFIG_ANDROID_RAM_CONSOLE) += ram_console.o
+obj-$(CONFIG_ANDROID_TIMED_OUTPUT) += timed_output.o
+obj-$(CONFIG_ANDROID_TIMED_GPIO) += timed_gpio.o
+obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER) += lowmemorykiller.o
diff --git a/stblinux-2.6.37/drivers/staging/android/TODO b/stblinux-2.6.37/drivers/staging/android/TODO
new file mode 100644
index 0000000..e59c5be
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/TODO
@@ -0,0 +1,10 @@
+TODO:
+ - checkpatch.pl cleanups
+ - sparse fixes
+ - rename files to be not so "generic"
+ - make sure things build as modules properly
+ - add proper arch dependancies as needed
+ - audit userspace interfaces to make sure they are sane
+
+Please send patches to Greg Kroah-Hartman <greg@kroah.com> and Cc:
+Brian Swetland <swetland@google.com>
diff --git a/stblinux-2.6.37/drivers/staging/android/binder.c b/stblinux-2.6.37/drivers/staging/android/binder.c
new file mode 100644
index 0000000..17d89a8
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/binder.c
@@ -0,0 +1,3730 @@
+/* binder.c
+ *
+ * Android IPC Subsystem
+ *
+ * Copyright (C) 2007-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <asm/cacheflush.h>
+#include <linux/fdtable.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/miscdevice.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/nsproxy.h>
+#include <linux/poll.h>
+#include <linux/proc_fs.h>
+#include <linux/rbtree.h>
+#include <linux/sched.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+#include "binder.h"
+
+static DEFINE_MUTEX(binder_lock);
+static HLIST_HEAD(binder_procs);
+static struct binder_node *binder_context_mgr_node;
+static uid_t binder_context_mgr_uid = -1;
+static int binder_last_id;
+static struct proc_dir_entry *binder_proc_dir_entry_root;
+static struct proc_dir_entry *binder_proc_dir_entry_proc;
+static struct hlist_head binder_dead_nodes;
+static HLIST_HEAD(binder_deferred_list);
+static DEFINE_MUTEX(binder_deferred_lock);
+
+static int binder_read_proc_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data);
+
+/* This is only defined in include/asm-arm/sizes.h */
+#ifndef SZ_1K
+#define SZ_1K 0x400
+#endif
+
+#ifndef SZ_4M
+#define SZ_4M 0x400000
+#endif
+
+#define FORBIDDEN_MMAP_FLAGS (VM_WRITE)
+
+#define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64)
+
+enum {
+ BINDER_DEBUG_USER_ERROR = 1U << 0,
+ BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1,
+ BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2,
+ BINDER_DEBUG_OPEN_CLOSE = 1U << 3,
+ BINDER_DEBUG_DEAD_BINDER = 1U << 4,
+ BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5,
+ BINDER_DEBUG_READ_WRITE = 1U << 6,
+ BINDER_DEBUG_USER_REFS = 1U << 7,
+ BINDER_DEBUG_THREADS = 1U << 8,
+ BINDER_DEBUG_TRANSACTION = 1U << 9,
+ BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10,
+ BINDER_DEBUG_FREE_BUFFER = 1U << 11,
+ BINDER_DEBUG_INTERNAL_REFS = 1U << 12,
+ BINDER_DEBUG_BUFFER_ALLOC = 1U << 13,
+ BINDER_DEBUG_PRIORITY_CAP = 1U << 14,
+ BINDER_DEBUG_BUFFER_ALLOC_ASYNC = 1U << 15,
+};
+static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
+ BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
+module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO);
+
+static int binder_debug_no_lock;
+module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO);
+
+static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
+static int binder_stop_on_user_error;
+
+static int binder_set_stop_on_user_error(const char *val,
+ struct kernel_param *kp)
+{
+ int ret;
+ ret = param_set_int(val, kp);
+ if (binder_stop_on_user_error < 2)
+ wake_up(&binder_user_error_wait);
+ return ret;
+}
+module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
+ param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO);
+
+#define binder_user_error(x...) \
+ do { \
+ if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \
+ printk(KERN_INFO x); \
+ if (binder_stop_on_user_error) \
+ binder_stop_on_user_error = 2; \
+ } while (0)
+
+enum {
+ BINDER_STAT_PROC,
+ BINDER_STAT_THREAD,
+ BINDER_STAT_NODE,
+ BINDER_STAT_REF,
+ BINDER_STAT_DEATH,
+ BINDER_STAT_TRANSACTION,
+ BINDER_STAT_TRANSACTION_COMPLETE,
+ BINDER_STAT_COUNT
+};
+
+struct binder_stats {
+ int br[_IOC_NR(BR_FAILED_REPLY) + 1];
+ int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1];
+ int obj_created[BINDER_STAT_COUNT];
+ int obj_deleted[BINDER_STAT_COUNT];
+};
+
+static struct binder_stats binder_stats;
+
+struct binder_transaction_log_entry {
+ int debug_id;
+ int call_type;
+ int from_proc;
+ int from_thread;
+ int target_handle;
+ int to_proc;
+ int to_thread;
+ int to_node;
+ int data_size;
+ int offsets_size;
+};
+struct binder_transaction_log {
+ int next;
+ int full;
+ struct binder_transaction_log_entry entry[32];
+};
+struct binder_transaction_log binder_transaction_log;
+struct binder_transaction_log binder_transaction_log_failed;
+
+static struct binder_transaction_log_entry *binder_transaction_log_add(
+ struct binder_transaction_log *log)
+{
+ struct binder_transaction_log_entry *e;
+ e = &log->entry[log->next];
+ memset(e, 0, sizeof(*e));
+ log->next++;
+ if (log->next == ARRAY_SIZE(log->entry)) {
+ log->next = 0;
+ log->full = 1;
+ }
+ return e;
+}
+
+struct binder_work {
+ struct list_head entry;
+ enum {
+ BINDER_WORK_TRANSACTION = 1,
+ BINDER_WORK_TRANSACTION_COMPLETE,
+ BINDER_WORK_NODE,
+ BINDER_WORK_DEAD_BINDER,
+ BINDER_WORK_DEAD_BINDER_AND_CLEAR,
+ BINDER_WORK_CLEAR_DEATH_NOTIFICATION,
+ } type;
+};
+
+struct binder_node {
+ int debug_id;
+ struct binder_work work;
+ union {
+ struct rb_node rb_node;
+ struct hlist_node dead_node;
+ };
+ struct binder_proc *proc;
+ struct hlist_head refs;
+ int internal_strong_refs;
+ int local_weak_refs;
+ int local_strong_refs;
+ void __user *ptr;
+ void __user *cookie;
+ unsigned has_strong_ref:1;
+ unsigned pending_strong_ref:1;
+ unsigned has_weak_ref:1;
+ unsigned pending_weak_ref:1;
+ unsigned has_async_transaction:1;
+ unsigned accept_fds:1;
+ unsigned min_priority:8;
+ struct list_head async_todo;
+};
+
+struct binder_ref_death {
+ struct binder_work work;
+ void __user *cookie;
+};
+
+struct binder_ref {
+ /* Lookups needed: */
+ /* node + proc => ref (transaction) */
+ /* desc + proc => ref (transaction, inc/dec ref) */
+ /* node => refs + procs (proc exit) */
+ int debug_id;
+ struct rb_node rb_node_desc;
+ struct rb_node rb_node_node;
+ struct hlist_node node_entry;
+ struct binder_proc *proc;
+ struct binder_node *node;
+ uint32_t desc;
+ int strong;
+ int weak;
+ struct binder_ref_death *death;
+};
+
+struct binder_buffer {
+ struct list_head entry; /* free and allocated entries by addesss */
+ struct rb_node rb_node; /* free entry by size or allocated entry */
+ /* by address */
+ unsigned free:1;
+ unsigned allow_user_free:1;
+ unsigned async_transaction:1;
+ unsigned debug_id:29;
+
+ struct binder_transaction *transaction;
+
+ struct binder_node *target_node;
+ size_t data_size;
+ size_t offsets_size;
+ uint8_t data[0];
+};
+
+enum {
+ BINDER_DEFERRED_PUT_FILES = 0x01,
+ BINDER_DEFERRED_FLUSH = 0x02,
+ BINDER_DEFERRED_RELEASE = 0x04,
+};
+
+struct binder_proc {
+ struct hlist_node proc_node;
+ struct rb_root threads;
+ struct rb_root nodes;
+ struct rb_root refs_by_desc;
+ struct rb_root refs_by_node;
+ int pid;
+ struct vm_area_struct *vma;
+ struct task_struct *tsk;
+ struct files_struct *files;
+ struct hlist_node deferred_work_node;
+ int deferred_work;
+ void *buffer;
+ ptrdiff_t user_buffer_offset;
+
+ struct list_head buffers;
+ struct rb_root free_buffers;
+ struct rb_root allocated_buffers;
+ size_t free_async_space;
+
+ struct page **pages;
+ size_t buffer_size;
+ uint32_t buffer_free;
+ struct list_head todo;
+ wait_queue_head_t wait;
+ struct binder_stats stats;
+ struct list_head delivered_death;
+ int max_threads;
+ int requested_threads;
+ int requested_threads_started;
+ int ready_threads;
+ long default_priority;
+};
+
+enum {
+ BINDER_LOOPER_STATE_REGISTERED = 0x01,
+ BINDER_LOOPER_STATE_ENTERED = 0x02,
+ BINDER_LOOPER_STATE_EXITED = 0x04,
+ BINDER_LOOPER_STATE_INVALID = 0x08,
+ BINDER_LOOPER_STATE_WAITING = 0x10,
+ BINDER_LOOPER_STATE_NEED_RETURN = 0x20
+};
+
+struct binder_thread {
+ struct binder_proc *proc;
+ struct rb_node rb_node;
+ int pid;
+ int looper;
+ struct binder_transaction *transaction_stack;
+ struct list_head todo;
+ uint32_t return_error; /* Write failed, return error code in read buf */
+ uint32_t return_error2; /* Write failed, return error code in read */
+ /* buffer. Used when sending a reply to a dead process that */
+ /* we are also waiting on */
+ wait_queue_head_t wait;
+ struct binder_stats stats;
+};
+
+struct binder_transaction {
+ int debug_id;
+ struct binder_work work;
+ struct binder_thread *from;
+ struct binder_transaction *from_parent;
+ struct binder_proc *to_proc;
+ struct binder_thread *to_thread;
+ struct binder_transaction *to_parent;
+ unsigned need_reply:1;
+ /* unsigned is_dead:1; */ /* not used at the moment */
+
+ struct binder_buffer *buffer;
+ unsigned int code;
+ unsigned int flags;
+ long priority;
+ long saved_priority;
+ uid_t sender_euid;
+};
+
+static void binder_defer_work(struct binder_proc *proc, int defer);
+
+/*
+ * copied from get_unused_fd_flags
+ */
+int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
+{
+ struct files_struct *files = proc->files;
+ int fd, error;
+ struct fdtable *fdt;
+ unsigned long rlim_cur;
+ unsigned long irqs;
+
+ if (files == NULL)
+ return -ESRCH;
+
+ error = -EMFILE;
+ spin_lock(&files->file_lock);
+
+repeat:
+ fdt = files_fdtable(files);
+ fd = find_next_zero_bit(fdt->open_fds->fds_bits, fdt->max_fds,
+ files->next_fd);
+
+ /*
+ * N.B. For clone tasks sharing a files structure, this test
+ * will limit the total number of files that can be opened.
+ */
+ rlim_cur = 0;
+ if (lock_task_sighand(proc->tsk, &irqs)) {
+ rlim_cur = proc->tsk->signal->rlim[RLIMIT_NOFILE].rlim_cur;
+ unlock_task_sighand(proc->tsk, &irqs);
+ }
+ if (fd >= rlim_cur)
+ goto out;
+
+ /* Do we need to expand the fd array or fd set? */
+ error = expand_files(files, fd);
+ if (error < 0)
+ goto out;
+
+ if (error) {
+ /*
+ * If we needed to expand the fs array we
+ * might have blocked - try again.
+ */
+ error = -EMFILE;
+ goto repeat;
+ }
+
+ FD_SET(fd, fdt->open_fds);
+ if (flags & O_CLOEXEC)
+ FD_SET(fd, fdt->close_on_exec);
+ else
+ FD_CLR(fd, fdt->close_on_exec);
+ files->next_fd = fd + 1;
+#if 1
+ /* Sanity check */
+ if (fdt->fd[fd] != NULL) {
+ printk(KERN_WARNING "get_unused_fd: slot %d not NULL!\n", fd);
+ fdt->fd[fd] = NULL;
+ }
+#endif
+ error = fd;
+
+out:
+ spin_unlock(&files->file_lock);
+ return error;
+}
+
+/*
+ * copied from fd_install
+ */
+static void task_fd_install(
+ struct binder_proc *proc, unsigned int fd, struct file *file)
+{
+ struct files_struct *files = proc->files;
+ struct fdtable *fdt;
+
+ if (files == NULL)
+ return;
+
+ spin_lock(&files->file_lock);
+ fdt = files_fdtable(files);
+ BUG_ON(fdt->fd[fd] != NULL);
+ rcu_assign_pointer(fdt->fd[fd], file);
+ spin_unlock(&files->file_lock);
+}
+
+/*
+ * copied from __put_unused_fd in open.c
+ */
+static void __put_unused_fd(struct files_struct *files, unsigned int fd)
+{
+ struct fdtable *fdt = files_fdtable(files);
+ __FD_CLR(fd, fdt->open_fds);
+ if (fd < files->next_fd)
+ files->next_fd = fd;
+}
+
+/*
+ * copied from sys_close
+ */
+static long task_close_fd(struct binder_proc *proc, unsigned int fd)
+{
+ struct file *filp;
+ struct files_struct *files = proc->files;
+ struct fdtable *fdt;
+ int retval;
+
+ if (files == NULL)
+ return -ESRCH;
+
+ spin_lock(&files->file_lock);
+ fdt = files_fdtable(files);
+ if (fd >= fdt->max_fds)
+ goto out_unlock;
+ filp = fdt->fd[fd];
+ if (!filp)
+ goto out_unlock;
+ rcu_assign_pointer(fdt->fd[fd], NULL);
+ FD_CLR(fd, fdt->close_on_exec);
+ __put_unused_fd(files, fd);
+ spin_unlock(&files->file_lock);
+ retval = filp_close(filp, files);
+
+ /* can't restart close syscall because file table entry was cleared */
+ if (unlikely(retval == -ERESTARTSYS ||
+ retval == -ERESTARTNOINTR ||
+ retval == -ERESTARTNOHAND ||
+ retval == -ERESTART_RESTARTBLOCK))
+ retval = -EINTR;
+
+ return retval;
+
+out_unlock:
+ spin_unlock(&files->file_lock);
+ return -EBADF;
+}
+
+static void binder_set_nice(long nice)
+{
+ long min_nice;
+ if (can_nice(current, nice)) {
+ set_user_nice(current, nice);
+ return;
+ }
+ min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur;
+ if (binder_debug_mask & BINDER_DEBUG_PRIORITY_CAP)
+ printk(KERN_INFO "binder: %d: nice value %ld not allowed use "
+ "%ld instead\n", current->pid, nice, min_nice);
+ set_user_nice(current, min_nice);
+ if (min_nice < 20)
+ return;
+ binder_user_error("binder: %d RLIMIT_NICE not set\n", current->pid);
+}
+
+static size_t binder_buffer_size(struct binder_proc *proc,
+ struct binder_buffer *buffer)
+{
+ if (list_is_last(&buffer->entry, &proc->buffers))
+ return proc->buffer + proc->buffer_size - (void *)buffer->data;
+ else
+ return (size_t)list_entry(buffer->entry.next,
+ struct binder_buffer, entry) - (size_t)buffer->data;
+}
+
+static void binder_insert_free_buffer(struct binder_proc *proc,
+ struct binder_buffer *new_buffer)
+{
+ struct rb_node **p = &proc->free_buffers.rb_node;
+ struct rb_node *parent = NULL;
+ struct binder_buffer *buffer;
+ size_t buffer_size;
+ size_t new_buffer_size;
+
+ BUG_ON(!new_buffer->free);
+
+ new_buffer_size = binder_buffer_size(proc, new_buffer);
+
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+ printk(KERN_INFO "binder: %d: add free buffer, size %zd, "
+ "at %p\n", proc->pid, new_buffer_size, new_buffer);
+
+ while (*p) {
+ parent = *p;
+ buffer = rb_entry(parent, struct binder_buffer, rb_node);
+ BUG_ON(!buffer->free);
+
+ buffer_size = binder_buffer_size(proc, buffer);
+
+ if (new_buffer_size < buffer_size)
+ p = &parent->rb_left;
+ else
+ p = &parent->rb_right;
+ }
+ rb_link_node(&new_buffer->rb_node, parent, p);
+ rb_insert_color(&new_buffer->rb_node, &proc->free_buffers);
+}
+
+static void binder_insert_allocated_buffer(struct binder_proc *proc,
+ struct binder_buffer *new_buffer)
+{
+ struct rb_node **p = &proc->allocated_buffers.rb_node;
+ struct rb_node *parent = NULL;
+ struct binder_buffer *buffer;
+
+ BUG_ON(new_buffer->free);
+
+ while (*p) {
+ parent = *p;
+ buffer = rb_entry(parent, struct binder_buffer, rb_node);
+ BUG_ON(buffer->free);
+
+ if (new_buffer < buffer)
+ p = &parent->rb_left;
+ else if (new_buffer > buffer)
+ p = &parent->rb_right;
+ else
+ BUG();
+ }
+ rb_link_node(&new_buffer->rb_node, parent, p);
+ rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers);
+}
+
+static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc,
+ void __user *user_ptr)
+{
+ struct rb_node *n = proc->allocated_buffers.rb_node;
+ struct binder_buffer *buffer;
+ struct binder_buffer *kern_ptr;
+
+ kern_ptr = user_ptr - proc->user_buffer_offset
+ - offsetof(struct binder_buffer, data);
+
+ while (n) {
+ buffer = rb_entry(n, struct binder_buffer, rb_node);
+ BUG_ON(buffer->free);
+
+ if (kern_ptr < buffer)
+ n = n->rb_left;
+ else if (kern_ptr > buffer)
+ n = n->rb_right;
+ else
+ return buffer;
+ }
+ return NULL;
+}
+
+static int binder_update_page_range(struct binder_proc *proc, int allocate,
+ void *start, void *end,
+ struct vm_area_struct *vma)
+{
+ void *page_addr;
+ unsigned long user_page_addr;
+ struct vm_struct tmp_area;
+ struct page **page;
+ struct mm_struct *mm;
+
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+ printk(KERN_INFO "binder: %d: %s pages %p-%p\n",
+ proc->pid, allocate ? "allocate" : "free", start, end);
+
+ if (end <= start)
+ return 0;
+
+ if (vma)
+ mm = NULL;
+ else
+ mm = get_task_mm(proc->tsk);
+
+ if (mm) {
+ down_write(&mm->mmap_sem);
+ vma = proc->vma;
+ }
+
+ if (allocate == 0)
+ goto free_range;
+
+ if (vma == NULL) {
+ printk(KERN_ERR "binder: %d: binder_alloc_buf failed to "
+ "map pages in userspace, no vma\n", proc->pid);
+ goto err_no_vma;
+ }
+
+ for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
+ int ret;
+ struct page **page_array_ptr;
+ page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
+
+ BUG_ON(*page);
+ *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ if (*page == NULL) {
+ printk(KERN_ERR "binder: %d: binder_alloc_buf failed "
+ "for page at %p\n", proc->pid, page_addr);
+ goto err_alloc_page_failed;
+ }
+ tmp_area.addr = page_addr;
+ tmp_area.size = PAGE_SIZE + PAGE_SIZE /* guard page? */;
+ page_array_ptr = page;
+ ret = map_vm_area(&tmp_area, PAGE_KERNEL, &page_array_ptr);
+ if (ret) {
+ printk(KERN_ERR "binder: %d: binder_alloc_buf failed "
+ "to map page at %p in kernel\n",
+ proc->pid, page_addr);
+ goto err_map_kernel_failed;
+ }
+ user_page_addr =
+ (uintptr_t)page_addr + proc->user_buffer_offset;
+ ret = vm_insert_page(vma, user_page_addr, page[0]);
+ if (ret) {
+ printk(KERN_ERR "binder: %d: binder_alloc_buf failed "
+ "to map page at %lx in userspace\n",
+ proc->pid, user_page_addr);
+ goto err_vm_insert_page_failed;
+ }
+ /* vm_insert_page does not seem to increment the refcount */
+ }
+ if (mm) {
+ up_write(&mm->mmap_sem);
+ mmput(mm);
+ }
+ return 0;
+
+free_range:
+ for (page_addr = end - PAGE_SIZE; page_addr >= start;
+ page_addr -= PAGE_SIZE) {
+ page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
+ if (vma)
+ zap_page_range(vma, (uintptr_t)page_addr +
+ proc->user_buffer_offset, PAGE_SIZE, NULL);
+err_vm_insert_page_failed:
+ unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
+err_map_kernel_failed:
+ __free_page(*page);
+ *page = NULL;
+err_alloc_page_failed:
+ ;
+ }
+err_no_vma:
+ if (mm) {
+ up_write(&mm->mmap_sem);
+ mmput(mm);
+ }
+ return -ENOMEM;
+}
+
+static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
+ size_t data_size,
+ size_t offsets_size, int is_async)
+{
+ struct rb_node *n = proc->free_buffers.rb_node;
+ struct binder_buffer *buffer;
+ size_t buffer_size;
+ struct rb_node *best_fit = NULL;
+ void *has_page_addr;
+ void *end_page_addr;
+ size_t size;
+
+ if (proc->vma == NULL) {
+ printk(KERN_ERR "binder: %d: binder_alloc_buf, no vma\n",
+ proc->pid);
+ return NULL;
+ }
+
+ size = ALIGN(data_size, sizeof(void *)) +
+ ALIGN(offsets_size, sizeof(void *));
+
+ if (size < data_size || size < offsets_size) {
+ binder_user_error("binder: %d: got transaction with invalid "
+ "size %zd-%zd\n", proc->pid, data_size, offsets_size);
+ return NULL;
+ }
+
+ if (is_async &&
+ proc->free_async_space < size + sizeof(struct binder_buffer)) {
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+ printk(KERN_ERR
+ "binder: %d: binder_alloc_buf size %zd failed, "
+ "no async space left\n", proc->pid, size);
+ return NULL;
+ }
+
+ while (n) {
+ buffer = rb_entry(n, struct binder_buffer, rb_node);
+ BUG_ON(!buffer->free);
+ buffer_size = binder_buffer_size(proc, buffer);
+
+ if (size < buffer_size) {
+ best_fit = n;
+ n = n->rb_left;
+ } else if (size > buffer_size)
+ n = n->rb_right;
+ else {
+ best_fit = n;
+ break;
+ }
+ }
+ if (best_fit == NULL) {
+ printk(KERN_ERR "binder: %d: binder_alloc_buf size %zd failed, "
+ "no address space\n", proc->pid, size);
+ return NULL;
+ }
+ if (n == NULL) {
+ buffer = rb_entry(best_fit, struct binder_buffer, rb_node);
+ buffer_size = binder_buffer_size(proc, buffer);
+ }
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+ printk(KERN_INFO "binder: %d: binder_alloc_buf size %zd got buff"
+ "er %p size %zd\n", proc->pid, size, buffer, buffer_size);
+
+ has_page_addr =
+ (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK);
+ if (n == NULL) {
+ if (size + sizeof(struct binder_buffer) + 4 >= buffer_size)
+ buffer_size = size; /* no room for other buffers */
+ else
+ buffer_size = size + sizeof(struct binder_buffer);
+ }
+ end_page_addr =
+ (void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size);
+ if (end_page_addr > has_page_addr)
+ end_page_addr = has_page_addr;
+ if (binder_update_page_range(proc, 1,
+ (void *)PAGE_ALIGN((uintptr_t)buffer->data), end_page_addr, NULL))
+ return NULL;
+
+ rb_erase(best_fit, &proc->free_buffers);
+ buffer->free = 0;
+ binder_insert_allocated_buffer(proc, buffer);
+ if (buffer_size != size) {
+ struct binder_buffer *new_buffer = (void *)buffer->data + size;
+ list_add(&new_buffer->entry, &buffer->entry);
+ new_buffer->free = 1;
+ binder_insert_free_buffer(proc, new_buffer);
+ }
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+ printk(KERN_INFO "binder: %d: binder_alloc_buf size %zd got "
+ "%p\n", proc->pid, size, buffer);
+ buffer->data_size = data_size;
+ buffer->offsets_size = offsets_size;
+ buffer->async_transaction = is_async;
+ if (is_async) {
+ proc->free_async_space -= size + sizeof(struct binder_buffer);
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC_ASYNC)
+ printk(KERN_INFO "binder: %d: binder_alloc_buf size %zd "
+ "async free %zd\n", proc->pid, size,
+ proc->free_async_space);
+ }
+
+ return buffer;
+}
+
+static void *buffer_start_page(struct binder_buffer *buffer)
+{
+ return (void *)((uintptr_t)buffer & PAGE_MASK);
+}
+
+static void *buffer_end_page(struct binder_buffer *buffer)
+{
+ return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK);
+}
+
+static void binder_delete_free_buffer(struct binder_proc *proc,
+ struct binder_buffer *buffer)
+{
+ struct binder_buffer *prev, *next = NULL;
+ int free_page_end = 1;
+ int free_page_start = 1;
+
+ BUG_ON(proc->buffers.next == &buffer->entry);
+ prev = list_entry(buffer->entry.prev, struct binder_buffer, entry);
+ BUG_ON(!prev->free);
+ if (buffer_end_page(prev) == buffer_start_page(buffer)) {
+ free_page_start = 0;
+ if (buffer_end_page(prev) == buffer_end_page(buffer))
+ free_page_end = 0;
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+ printk(KERN_INFO "binder: %d: merge free, buffer %p "
+ "share page with %p\n", proc->pid, buffer, prev);
+ }
+
+ if (!list_is_last(&buffer->entry, &proc->buffers)) {
+ next = list_entry(buffer->entry.next,
+ struct binder_buffer, entry);
+ if (buffer_start_page(next) == buffer_end_page(buffer)) {
+ free_page_end = 0;
+ if (buffer_start_page(next) ==
+ buffer_start_page(buffer))
+ free_page_start = 0;
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+ printk(KERN_INFO "binder: %d: merge free, "
+ "buffer %p share page with %p\n",
+ proc->pid, buffer, prev);
+ }
+ }
+ list_del(&buffer->entry);
+ if (free_page_start || free_page_end) {
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+ printk(KERN_INFO "binder: %d: merge free, buffer %p do "
+ "not share page%s%s with with %p or %p\n",
+ proc->pid, buffer, free_page_start ? "" : " end",
+ free_page_end ? "" : " start", prev, next);
+ binder_update_page_range(proc, 0, free_page_start ?
+ buffer_start_page(buffer) : buffer_end_page(buffer),
+ (free_page_end ? buffer_end_page(buffer) :
+ buffer_start_page(buffer)) + PAGE_SIZE, NULL);
+ }
+}
+
+static void binder_free_buf(struct binder_proc *proc,
+ struct binder_buffer *buffer)
+{
+ size_t size, buffer_size;
+
+ buffer_size = binder_buffer_size(proc, buffer);
+
+ size = ALIGN(buffer->data_size, sizeof(void *)) +
+ ALIGN(buffer->offsets_size, sizeof(void *));
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+ printk(KERN_INFO "binder: %d: binder_free_buf %p size %zd buffer"
+ "_size %zd\n", proc->pid, buffer, size, buffer_size);
+
+ BUG_ON(buffer->free);
+ BUG_ON(size > buffer_size);
+ BUG_ON(buffer->transaction != NULL);
+ BUG_ON((void *)buffer < proc->buffer);
+ BUG_ON((void *)buffer > proc->buffer + proc->buffer_size);
+
+ if (buffer->async_transaction) {
+ proc->free_async_space += size + sizeof(struct binder_buffer);
+ if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC_ASYNC)
+ printk(KERN_INFO "binder: %d: binder_free_buf size %zd "
+ "async free %zd\n", proc->pid, size,
+ proc->free_async_space);
+ }
+
+ binder_update_page_range(proc, 0,
+ (void *)PAGE_ALIGN((uintptr_t)buffer->data),
+ (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK),
+ NULL);
+ rb_erase(&buffer->rb_node, &proc->allocated_buffers);
+ buffer->free = 1;
+ if (!list_is_last(&buffer->entry, &proc->buffers)) {
+ struct binder_buffer *next = list_entry(buffer->entry.next,
+ struct binder_buffer, entry);
+ if (next->free) {
+ rb_erase(&next->rb_node, &proc->free_buffers);
+ binder_delete_free_buffer(proc, next);
+ }
+ }
+ if (proc->buffers.next != &buffer->entry) {
+ struct binder_buffer *prev = list_entry(buffer->entry.prev,
+ struct binder_buffer, entry);
+ if (prev->free) {
+ binder_delete_free_buffer(proc, buffer);
+ rb_erase(&prev->rb_node, &proc->free_buffers);
+ buffer = prev;
+ }
+ }
+ binder_insert_free_buffer(proc, buffer);
+}
+
+static struct binder_node *binder_get_node(struct binder_proc *proc,
+ void __user *ptr)
+{
+ struct rb_node *n = proc->nodes.rb_node;
+ struct binder_node *node;
+
+ while (n) {
+ node = rb_entry(n, struct binder_node, rb_node);
+
+ if (ptr < node->ptr)
+ n = n->rb_left;
+ else if (ptr > node->ptr)
+ n = n->rb_right;
+ else
+ return node;
+ }
+ return NULL;
+}
+
+static struct binder_node *binder_new_node(struct binder_proc *proc,
+ void __user *ptr,
+ void __user *cookie)
+{
+ struct rb_node **p = &proc->nodes.rb_node;
+ struct rb_node *parent = NULL;
+ struct binder_node *node;
+
+ while (*p) {
+ parent = *p;
+ node = rb_entry(parent, struct binder_node, rb_node);
+
+ if (ptr < node->ptr)
+ p = &(*p)->rb_left;
+ else if (ptr > node->ptr)
+ p = &(*p)->rb_right;
+ else
+ return NULL;
+ }
+
+ node = kzalloc(sizeof(*node), GFP_KERNEL);
+ if (node == NULL)
+ return NULL;
+ binder_stats.obj_created[BINDER_STAT_NODE]++;
+ rb_link_node(&node->rb_node, parent, p);
+ rb_insert_color(&node->rb_node, &proc->nodes);
+ node->debug_id = ++binder_last_id;
+ node->proc = proc;
+ node->ptr = ptr;
+ node->cookie = cookie;
+ node->work.type = BINDER_WORK_NODE;
+ INIT_LIST_HEAD(&node->work.entry);
+ INIT_LIST_HEAD(&node->async_todo);
+ if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+ printk(KERN_INFO "binder: %d:%d node %d u%p c%p created\n",
+ proc->pid, current->pid, node->debug_id,
+ node->ptr, node->cookie);
+ return node;
+}
+
+static int binder_inc_node(struct binder_node *node, int strong, int internal,
+ struct list_head *target_list)
+{
+ if (strong) {
+ if (internal) {
+ if (target_list == NULL &&
+ node->internal_strong_refs == 0 &&
+ !(node == binder_context_mgr_node &&
+ node->has_strong_ref)) {
+ printk(KERN_ERR "binder: invalid inc strong "
+ "node for %d\n", node->debug_id);
+ return -EINVAL;
+ }
+ node->internal_strong_refs++;
+ } else
+ node->local_strong_refs++;
+ if (!node->has_strong_ref && target_list) {
+ list_del_init(&node->work.entry);
+ list_add_tail(&node->work.entry, target_list);
+ }
+ } else {
+ if (!internal)
+ node->local_weak_refs++;
+ if (!node->has_weak_ref && list_empty(&node->work.entry)) {
+ if (target_list == NULL) {
+ printk(KERN_ERR "binder: invalid inc weak node "
+ "for %d\n", node->debug_id);
+ return -EINVAL;
+ }
+ list_add_tail(&node->work.entry, target_list);
+ }
+ }
+ return 0;
+}
+
+static int binder_dec_node(struct binder_node *node, int strong, int internal)
+{
+ if (strong) {
+ if (internal)
+ node->internal_strong_refs--;
+ else
+ node->local_strong_refs--;
+ if (node->local_strong_refs || node->internal_strong_refs)
+ return 0;
+ } else {
+ if (!internal)
+ node->local_weak_refs--;
+ if (node->local_weak_refs || !hlist_empty(&node->refs))
+ return 0;
+ }
+ if (node->proc && (node->has_strong_ref || node->has_weak_ref)) {
+ if (list_empty(&node->work.entry)) {
+ list_add_tail(&node->work.entry, &node->proc->todo);
+ wake_up_interruptible(&node->proc->wait);
+ }
+ } else {
+ if (hlist_empty(&node->refs) && !node->local_strong_refs &&
+ !node->local_weak_refs) {
+ list_del_init(&node->work.entry);
+ if (node->proc) {
+ rb_erase(&node->rb_node, &node->proc->nodes);
+ if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+ printk(KERN_INFO "binder: refless node %d deleted\n", node->debug_id);
+ } else {
+ hlist_del(&node->dead_node);
+ if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+ printk(KERN_INFO "binder: dead node %d deleted\n", node->debug_id);
+ }
+ kfree(node);
+ binder_stats.obj_deleted[BINDER_STAT_NODE]++;
+ }
+ }
+
+ return 0;
+}
+
+
+static struct binder_ref *binder_get_ref(struct binder_proc *proc,
+ uint32_t desc)
+{
+ struct rb_node *n = proc->refs_by_desc.rb_node;
+ struct binder_ref *ref;
+
+ while (n) {
+ ref = rb_entry(n, struct binder_ref, rb_node_desc);
+
+ if (desc < ref->desc)
+ n = n->rb_left;
+ else if (desc > ref->desc)
+ n = n->rb_right;
+ else
+ return ref;
+ }
+ return NULL;
+}
+
+static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc,
+ struct binder_node *node)
+{
+ struct rb_node *n;
+ struct rb_node **p = &proc->refs_by_node.rb_node;
+ struct rb_node *parent = NULL;
+ struct binder_ref *ref, *new_ref;
+
+ while (*p) {
+ parent = *p;
+ ref = rb_entry(parent, struct binder_ref, rb_node_node);
+
+ if (node < ref->node)
+ p = &(*p)->rb_left;
+ else if (node > ref->node)
+ p = &(*p)->rb_right;
+ else
+ return ref;
+ }
+ new_ref = kzalloc(sizeof(*ref), GFP_KERNEL);
+ if (new_ref == NULL)
+ return NULL;
+ binder_stats.obj_created[BINDER_STAT_REF]++;
+ new_ref->debug_id = ++binder_last_id;
+ new_ref->proc = proc;
+ new_ref->node = node;
+ rb_link_node(&new_ref->rb_node_node, parent, p);
+ rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node);
+
+ new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1;
+ for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
+ ref = rb_entry(n, struct binder_ref, rb_node_desc);
+ if (ref->desc > new_ref->desc)
+ break;
+ new_ref->desc = ref->desc + 1;
+ }
+
+ p = &proc->refs_by_desc.rb_node;
+ while (*p) {
+ parent = *p;
+ ref = rb_entry(parent, struct binder_ref, rb_node_desc);
+
+ if (new_ref->desc < ref->desc)
+ p = &(*p)->rb_left;
+ else if (new_ref->desc > ref->desc)
+ p = &(*p)->rb_right;
+ else
+ BUG();
+ }
+ rb_link_node(&new_ref->rb_node_desc, parent, p);
+ rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc);
+ if (node) {
+ hlist_add_head(&new_ref->node_entry, &node->refs);
+ if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+ printk(KERN_INFO "binder: %d new ref %d desc %d for "
+ "node %d\n", proc->pid, new_ref->debug_id,
+ new_ref->desc, node->debug_id);
+ } else {
+ if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+ printk(KERN_INFO "binder: %d new ref %d desc %d for "
+ "dead node\n", proc->pid, new_ref->debug_id,
+ new_ref->desc);
+ }
+ return new_ref;
+}
+
+static void binder_delete_ref(struct binder_ref *ref)
+{
+ if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+ printk(KERN_INFO "binder: %d delete ref %d desc %d for "
+ "node %d\n", ref->proc->pid, ref->debug_id,
+ ref->desc, ref->node->debug_id);
+ rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc);
+ rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node);
+ if (ref->strong)
+ binder_dec_node(ref->node, 1, 1);
+ hlist_del(&ref->node_entry);
+ binder_dec_node(ref->node, 0, 1);
+ if (ref->death) {
+ if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+ printk(KERN_INFO "binder: %d delete ref %d desc %d "
+ "has death notification\n", ref->proc->pid,
+ ref->debug_id, ref->desc);
+ list_del(&ref->death->work.entry);
+ kfree(ref->death);
+ binder_stats.obj_deleted[BINDER_STAT_DEATH]++;
+ }
+ kfree(ref);
+ binder_stats.obj_deleted[BINDER_STAT_REF]++;
+}
+
+static int binder_inc_ref(struct binder_ref *ref, int strong,
+ struct list_head *target_list)
+{
+ int ret;
+ if (strong) {
+ if (ref->strong == 0) {
+ ret = binder_inc_node(ref->node, 1, 1, target_list);
+ if (ret)
+ return ret;
+ }
+ ref->strong++;
+ } else {
+ if (ref->weak == 0) {
+ ret = binder_inc_node(ref->node, 0, 1, target_list);
+ if (ret)
+ return ret;
+ }
+ ref->weak++;
+ }
+ return 0;
+}
+
+
+static int binder_dec_ref(struct binder_ref *ref, int strong)
+{
+ if (strong) {
+ if (ref->strong == 0) {
+ binder_user_error("binder: %d invalid dec strong, "
+ "ref %d desc %d s %d w %d\n",
+ ref->proc->pid, ref->debug_id,
+ ref->desc, ref->strong, ref->weak);
+ return -EINVAL;
+ }
+ ref->strong--;
+ if (ref->strong == 0) {
+ int ret;
+ ret = binder_dec_node(ref->node, strong, 1);
+ if (ret)
+ return ret;
+ }
+ } else {
+ if (ref->weak == 0) {
+ binder_user_error("binder: %d invalid dec weak, "
+ "ref %d desc %d s %d w %d\n",
+ ref->proc->pid, ref->debug_id,
+ ref->desc, ref->strong, ref->weak);
+ return -EINVAL;
+ }
+ ref->weak--;
+ }
+ if (ref->strong == 0 && ref->weak == 0)
+ binder_delete_ref(ref);
+ return 0;
+}
+
+static void binder_pop_transaction(struct binder_thread *target_thread,
+ struct binder_transaction *t)
+{
+ if (target_thread) {
+ BUG_ON(target_thread->transaction_stack != t);
+ BUG_ON(target_thread->transaction_stack->from != target_thread);
+ target_thread->transaction_stack =
+ target_thread->transaction_stack->from_parent;
+ t->from = NULL;
+ }
+ t->need_reply = 0;
+ if (t->buffer)
+ t->buffer->transaction = NULL;
+ kfree(t);
+ binder_stats.obj_deleted[BINDER_STAT_TRANSACTION]++;
+}
+
+static void binder_send_failed_reply(struct binder_transaction *t,
+ uint32_t error_code)
+{
+ struct binder_thread *target_thread;
+ BUG_ON(t->flags & TF_ONE_WAY);
+ while (1) {
+ target_thread = t->from;
+ if (target_thread) {
+ if (target_thread->return_error != BR_OK &&
+ target_thread->return_error2 == BR_OK) {
+ target_thread->return_error2 =
+ target_thread->return_error;
+ target_thread->return_error = BR_OK;
+ }
+ if (target_thread->return_error == BR_OK) {
+ if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION)
+ printk(KERN_INFO "binder: send failed reply for transaction %d to %d:%d\n",
+ t->debug_id, target_thread->proc->pid, target_thread->pid);
+
+ binder_pop_transaction(target_thread, t);
+ target_thread->return_error = error_code;
+ wake_up_interruptible(&target_thread->wait);
+ } else {
+ printk(KERN_ERR "binder: reply failed, target "
+ "thread, %d:%d, has error code %d "
+ "already\n", target_thread->proc->pid,
+ target_thread->pid,
+ target_thread->return_error);
+ }
+ return;
+ } else {
+ struct binder_transaction *next = t->from_parent;
+
+ if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION)
+ printk(KERN_INFO "binder: send failed reply "
+ "for transaction %d, target dead\n",
+ t->debug_id);
+
+ binder_pop_transaction(target_thread, t);
+ if (next == NULL) {
+ if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+ printk(KERN_INFO "binder: reply failed,"
+ " no target thread at root\n");
+ return;
+ }
+ t = next;
+ if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+ printk(KERN_INFO "binder: reply failed, no targ"
+ "et thread -- retry %d\n", t->debug_id);
+ }
+ }
+}
+
+static void binder_transaction_buffer_release(struct binder_proc *proc,
+ struct binder_buffer *buffer,
+ size_t *failed_at);
+
+static void binder_transaction(struct binder_proc *proc,
+ struct binder_thread *thread,
+ struct binder_transaction_data *tr, int reply)
+{
+ struct binder_transaction *t;
+ struct binder_work *tcomplete;
+ size_t *offp, *off_end;
+ struct binder_proc *target_proc;
+ struct binder_thread *target_thread = NULL;
+ struct binder_node *target_node = NULL;
+ struct list_head *target_list;
+ wait_queue_head_t *target_wait;
+ struct binder_transaction *in_reply_to = NULL;
+ struct binder_transaction_log_entry *e;
+ uint32_t return_error;
+
+ e = binder_transaction_log_add(&binder_transaction_log);
+ e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY);
+ e->from_proc = proc->pid;
+ e->from_thread = thread->pid;
+ e->target_handle = tr->target.handle;
+ e->data_size = tr->data_size;
+ e->offsets_size = tr->offsets_size;
+
+ if (reply) {
+ in_reply_to = thread->transaction_stack;
+ if (in_reply_to == NULL) {
+ binder_user_error("binder: %d:%d got reply transaction "
+ "with no transaction stack\n",
+ proc->pid, thread->pid);
+ return_error = BR_FAILED_REPLY;
+ goto err_empty_call_stack;
+ }
+ binder_set_nice(in_reply_to->saved_priority);
+ if (in_reply_to->to_thread != thread) {
+ binder_user_error("binder: %d:%d got reply transaction "
+ "with bad transaction stack,"
+ " transaction %d has target %d:%d\n",
+ proc->pid, thread->pid, in_reply_to->debug_id,
+ in_reply_to->to_proc ?
+ in_reply_to->to_proc->pid : 0,
+ in_reply_to->to_thread ?
+ in_reply_to->to_thread->pid : 0);
+ return_error = BR_FAILED_REPLY;
+ in_reply_to = NULL;
+ goto err_bad_call_stack;
+ }
+ thread->transaction_stack = in_reply_to->to_parent;
+ target_thread = in_reply_to->from;
+ if (target_thread == NULL) {
+ return_error = BR_DEAD_REPLY;
+ goto err_dead_binder;
+ }
+ if (target_thread->transaction_stack != in_reply_to) {
+ binder_user_error("binder: %d:%d got reply transaction "
+ "with bad target transaction stack %d, "
+ "expected %d\n",
+ proc->pid, thread->pid,
+ target_thread->transaction_stack ?
+ target_thread->transaction_stack->debug_id : 0,
+ in_reply_to->debug_id);
+ return_error = BR_FAILED_REPLY;
+ in_reply_to = NULL;
+ target_thread = NULL;
+ goto err_dead_binder;
+ }
+ target_proc = target_thread->proc;
+ } else {
+ if (tr->target.handle) {
+ struct binder_ref *ref;
+ ref = binder_get_ref(proc, tr->target.handle);
+ if (ref == NULL) {
+ binder_user_error("binder: %d:%d got "
+ "transaction to invalid handle\n",
+ proc->pid, thread->pid);
+ return_error = BR_FAILED_REPLY;
+ goto err_invalid_target_handle;
+ }
+ target_node = ref->node;
+ } else {
+ target_node = binder_context_mgr_node;
+ if (target_node == NULL) {
+ return_error = BR_DEAD_REPLY;
+ goto err_no_context_mgr_node;
+ }
+ }
+ e->to_node = target_node->debug_id;
+ target_proc = target_node->proc;
+ if (target_proc == NULL) {
+ return_error = BR_DEAD_REPLY;
+ goto err_dead_binder;
+ }
+ if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) {
+ struct binder_transaction *tmp;
+ tmp = thread->transaction_stack;
+ if (tmp->to_thread != thread) {
+ binder_user_error("binder: %d:%d got new "
+ "transaction with bad transaction stack"
+ ", transaction %d has target %d:%d\n",
+ proc->pid, thread->pid, tmp->debug_id,
+ tmp->to_proc ? tmp->to_proc->pid : 0,
+ tmp->to_thread ?
+ tmp->to_thread->pid : 0);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_call_stack;
+ }
+ while (tmp) {
+ if (tmp->from && tmp->from->proc == target_proc)
+ target_thread = tmp->from;
+ tmp = tmp->from_parent;
+ }
+ }
+ }
+ if (target_thread) {
+ e->to_thread = target_thread->pid;
+ target_list = &target_thread->todo;
+ target_wait = &target_thread->wait;
+ } else {
+ target_list = &target_proc->todo;
+ target_wait = &target_proc->wait;
+ }
+ e->to_proc = target_proc->pid;
+
+ /* TODO: reuse incoming transaction for reply */
+ t = kzalloc(sizeof(*t), GFP_KERNEL);
+ if (t == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_alloc_t_failed;
+ }
+ binder_stats.obj_created[BINDER_STAT_TRANSACTION]++;
+
+ tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL);
+ if (tcomplete == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_alloc_tcomplete_failed;
+ }
+ binder_stats.obj_created[BINDER_STAT_TRANSACTION_COMPLETE]++;
+
+ t->debug_id = ++binder_last_id;
+ e->debug_id = t->debug_id;
+
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) {
+ if (reply)
+ printk(KERN_INFO "binder: %d:%d BC_REPLY %d -> %d:%d, "
+ "data %p-%p size %zd-%zd\n",
+ proc->pid, thread->pid, t->debug_id,
+ target_proc->pid, target_thread->pid,
+ tr->data.ptr.buffer, tr->data.ptr.offsets,
+ tr->data_size, tr->offsets_size);
+ else
+ printk(KERN_INFO "binder: %d:%d BC_TRANSACTION %d -> "
+ "%d - node %d, data %p-%p size %zd-%zd\n",
+ proc->pid, thread->pid, t->debug_id,
+ target_proc->pid, target_node->debug_id,
+ tr->data.ptr.buffer, tr->data.ptr.offsets,
+ tr->data_size, tr->offsets_size);
+ }
+
+ if (!reply && !(tr->flags & TF_ONE_WAY))
+ t->from = thread;
+ else
+ t->from = NULL;
+ t->sender_euid = proc->tsk->cred->euid;
+ t->to_proc = target_proc;
+ t->to_thread = target_thread;
+ t->code = tr->code;
+ t->flags = tr->flags;
+ t->priority = task_nice(current);
+ t->buffer = binder_alloc_buf(target_proc, tr->data_size,
+ tr->offsets_size, !reply && (t->flags & TF_ONE_WAY));
+ if (t->buffer == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_alloc_buf_failed;
+ }
+ t->buffer->allow_user_free = 0;
+ t->buffer->debug_id = t->debug_id;
+ t->buffer->transaction = t;
+ t->buffer->target_node = target_node;
+ if (target_node)
+ binder_inc_node(target_node, 1, 0, NULL);
+
+ offp = (size_t *)(t->buffer->data + ALIGN(tr->data_size, sizeof(void *)));
+
+ if (copy_from_user(t->buffer->data, tr->data.ptr.buffer, tr->data_size)) {
+ binder_user_error("binder: %d:%d got transaction with invalid "
+ "data ptr\n", proc->pid, thread->pid);
+ return_error = BR_FAILED_REPLY;
+ goto err_copy_data_failed;
+ }
+ if (copy_from_user(offp, tr->data.ptr.offsets, tr->offsets_size)) {
+ binder_user_error("binder: %d:%d got transaction with invalid "
+ "offsets ptr\n", proc->pid, thread->pid);
+ return_error = BR_FAILED_REPLY;
+ goto err_copy_data_failed;
+ }
+ if (!IS_ALIGNED(tr->offsets_size, sizeof(size_t))) {
+ binder_user_error("binder: %d:%d got transaction with "
+ "invalid offsets size, %zd\n",
+ proc->pid, thread->pid, tr->offsets_size);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_offset;
+ }
+ off_end = (void *)offp + tr->offsets_size;
+ for (; offp < off_end; offp++) {
+ struct flat_binder_object *fp;
+ if (*offp > t->buffer->data_size - sizeof(*fp) ||
+ t->buffer->data_size < sizeof(*fp) ||
+ !IS_ALIGNED(*offp, sizeof(void *))) {
+ binder_user_error("binder: %d:%d got transaction with "
+ "invalid offset, %zd\n",
+ proc->pid, thread->pid, *offp);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_offset;
+ }
+ fp = (struct flat_binder_object *)(t->buffer->data + *offp);
+ switch (fp->type) {
+ case BINDER_TYPE_BINDER:
+ case BINDER_TYPE_WEAK_BINDER: {
+ struct binder_ref *ref;
+ struct binder_node *node = binder_get_node(proc, fp->binder);
+ if (node == NULL) {
+ node = binder_new_node(proc, fp->binder, fp->cookie);
+ if (node == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_new_node_failed;
+ }
+ node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
+ node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
+ }
+ if (fp->cookie != node->cookie) {
+ binder_user_error("binder: %d:%d sending u%p "
+ "node %d, cookie mismatch %p != %p\n",
+ proc->pid, thread->pid,
+ fp->binder, node->debug_id,
+ fp->cookie, node->cookie);
+ goto err_binder_get_ref_for_node_failed;
+ }
+ ref = binder_get_ref_for_node(target_proc, node);
+ if (ref == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_get_ref_for_node_failed;
+ }
+ if (fp->type == BINDER_TYPE_BINDER)
+ fp->type = BINDER_TYPE_HANDLE;
+ else
+ fp->type = BINDER_TYPE_WEAK_HANDLE;
+ fp->handle = ref->desc;
+ binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE, &thread->todo);
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+ printk(KERN_INFO " node %d u%p -> ref %d desc %d\n",
+ node->debug_id, node->ptr, ref->debug_id, ref->desc);
+ } break;
+ case BINDER_TYPE_HANDLE:
+ case BINDER_TYPE_WEAK_HANDLE: {
+ struct binder_ref *ref = binder_get_ref(proc, fp->handle);
+ if (ref == NULL) {
+ binder_user_error("binder: %d:%d got "
+ "transaction with invalid "
+ "handle, %ld\n", proc->pid,
+ thread->pid, fp->handle);
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_get_ref_failed;
+ }
+ if (ref->node->proc == target_proc) {
+ if (fp->type == BINDER_TYPE_HANDLE)
+ fp->type = BINDER_TYPE_BINDER;
+ else
+ fp->type = BINDER_TYPE_WEAK_BINDER;
+ fp->binder = ref->node->ptr;
+ fp->cookie = ref->node->cookie;
+ binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL);
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+ printk(KERN_INFO " ref %d desc %d -> node %d u%p\n",
+ ref->debug_id, ref->desc, ref->node->debug_id, ref->node->ptr);
+ } else {
+ struct binder_ref *new_ref;
+ new_ref = binder_get_ref_for_node(target_proc, ref->node);
+ if (new_ref == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_get_ref_for_node_failed;
+ }
+ fp->handle = new_ref->desc;
+ binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL);
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+ printk(KERN_INFO " ref %d desc %d -> ref %d desc %d (node %d)\n",
+ ref->debug_id, ref->desc, new_ref->debug_id, new_ref->desc, ref->node->debug_id);
+ }
+ } break;
+
+ case BINDER_TYPE_FD: {
+ int target_fd;
+ struct file *file;
+
+ if (reply) {
+ if (!(in_reply_to->flags & TF_ACCEPT_FDS)) {
+ binder_user_error("binder: %d:%d got reply with fd, %ld, but target does not allow fds\n",
+ proc->pid, thread->pid, fp->handle);
+ return_error = BR_FAILED_REPLY;
+ goto err_fd_not_allowed;
+ }
+ } else if (!target_node->accept_fds) {
+ binder_user_error("binder: %d:%d got transaction with fd, %ld, but target does not allow fds\n",
+ proc->pid, thread->pid, fp->handle);
+ return_error = BR_FAILED_REPLY;
+ goto err_fd_not_allowed;
+ }
+
+ file = fget(fp->handle);
+ if (file == NULL) {
+ binder_user_error("binder: %d:%d got transaction with invalid fd, %ld\n",
+ proc->pid, thread->pid, fp->handle);
+ return_error = BR_FAILED_REPLY;
+ goto err_fget_failed;
+ }
+ target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC);
+ if (target_fd < 0) {
+ fput(file);
+ return_error = BR_FAILED_REPLY;
+ goto err_get_unused_fd_failed;
+ }
+ task_fd_install(target_proc, target_fd, file);
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+ printk(KERN_INFO " fd %ld -> %d\n", fp->handle, target_fd);
+ /* TODO: fput? */
+ fp->handle = target_fd;
+ } break;
+
+ default:
+ binder_user_error("binder: %d:%d got transactio"
+ "n with invalid object type, %lx\n",
+ proc->pid, thread->pid, fp->type);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_object_type;
+ }
+ }
+ if (reply) {
+ BUG_ON(t->buffer->async_transaction != 0);
+ binder_pop_transaction(target_thread, in_reply_to);
+ } else if (!(t->flags & TF_ONE_WAY)) {
+ BUG_ON(t->buffer->async_transaction != 0);
+ t->need_reply = 1;
+ t->from_parent = thread->transaction_stack;
+ thread->transaction_stack = t;
+ } else {
+ BUG_ON(target_node == NULL);
+ BUG_ON(t->buffer->async_transaction != 1);
+ if (target_node->has_async_transaction) {
+ target_list = &target_node->async_todo;
+ target_wait = NULL;
+ } else
+ target_node->has_async_transaction = 1;
+ }
+ t->work.type = BINDER_WORK_TRANSACTION;
+ list_add_tail(&t->work.entry, target_list);
+ tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE;
+ list_add_tail(&tcomplete->entry, &thread->todo);
+ if (target_wait)
+ wake_up_interruptible(target_wait);
+ return;
+
+err_get_unused_fd_failed:
+err_fget_failed:
+err_fd_not_allowed:
+err_binder_get_ref_for_node_failed:
+err_binder_get_ref_failed:
+err_binder_new_node_failed:
+err_bad_object_type:
+err_bad_offset:
+err_copy_data_failed:
+ binder_transaction_buffer_release(target_proc, t->buffer, offp);
+ t->buffer->transaction = NULL;
+ binder_free_buf(target_proc, t->buffer);
+err_binder_alloc_buf_failed:
+ kfree(tcomplete);
+ binder_stats.obj_deleted[BINDER_STAT_TRANSACTION_COMPLETE]++;
+err_alloc_tcomplete_failed:
+ kfree(t);
+ binder_stats.obj_deleted[BINDER_STAT_TRANSACTION]++;
+err_alloc_t_failed:
+err_bad_call_stack:
+err_empty_call_stack:
+err_dead_binder:
+err_invalid_target_handle:
+err_no_context_mgr_node:
+ if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION)
+ printk(KERN_INFO "binder: %d:%d transaction failed %d, size"
+ "%zd-%zd\n",
+ proc->pid, thread->pid, return_error,
+ tr->data_size, tr->offsets_size);
+
+ {
+ struct binder_transaction_log_entry *fe;
+ fe = binder_transaction_log_add(&binder_transaction_log_failed);
+ *fe = *e;
+ }
+
+ BUG_ON(thread->return_error != BR_OK);
+ if (in_reply_to) {
+ thread->return_error = BR_TRANSACTION_COMPLETE;
+ binder_send_failed_reply(in_reply_to, return_error);
+ } else
+ thread->return_error = return_error;
+}
+
+static void binder_transaction_buffer_release(struct binder_proc *proc,
+ struct binder_buffer *buffer,
+ size_t *failed_at)
+{
+ size_t *offp, *off_end;
+ int debug_id = buffer->debug_id;
+
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+ printk(KERN_INFO "binder: %d buffer release %d, size %zd-%zd, failed at %p\n",
+ proc->pid, buffer->debug_id,
+ buffer->data_size, buffer->offsets_size, failed_at);
+
+ if (buffer->target_node)
+ binder_dec_node(buffer->target_node, 1, 0);
+
+ offp = (size_t *)(buffer->data + ALIGN(buffer->data_size, sizeof(void *)));
+ if (failed_at)
+ off_end = failed_at;
+ else
+ off_end = (void *)offp + buffer->offsets_size;
+ for (; offp < off_end; offp++) {
+ struct flat_binder_object *fp;
+ if (*offp > buffer->data_size - sizeof(*fp) ||
+ buffer->data_size < sizeof(*fp) ||
+ !IS_ALIGNED(*offp, sizeof(void *))) {
+ printk(KERN_ERR "binder: transaction release %d bad"
+ "offset %zd, size %zd\n", debug_id, *offp, buffer->data_size);
+ continue;
+ }
+ fp = (struct flat_binder_object *)(buffer->data + *offp);
+ switch (fp->type) {
+ case BINDER_TYPE_BINDER:
+ case BINDER_TYPE_WEAK_BINDER: {
+ struct binder_node *node = binder_get_node(proc, fp->binder);
+ if (node == NULL) {
+ printk(KERN_ERR "binder: transaction release %d bad node %p\n", debug_id, fp->binder);
+ break;
+ }
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+ printk(KERN_INFO " node %d u%p\n",
+ node->debug_id, node->ptr);
+ binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0);
+ } break;
+ case BINDER_TYPE_HANDLE:
+ case BINDER_TYPE_WEAK_HANDLE: {
+ struct binder_ref *ref = binder_get_ref(proc, fp->handle);
+ if (ref == NULL) {
+ printk(KERN_ERR "binder: transaction release %d bad handle %ld\n", debug_id, fp->handle);
+ break;
+ }
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+ printk(KERN_INFO " ref %d desc %d (node %d)\n",
+ ref->debug_id, ref->desc, ref->node->debug_id);
+ binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE);
+ } break;
+
+ case BINDER_TYPE_FD:
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+ printk(KERN_INFO " fd %ld\n", fp->handle);
+ if (failed_at)
+ task_close_fd(proc, fp->handle);
+ break;
+
+ default:
+ printk(KERN_ERR "binder: transaction release %d bad object type %lx\n", debug_id, fp->type);
+ break;
+ }
+ }
+}
+
+int binder_thread_write(struct binder_proc *proc, struct binder_thread *thread,
+ void __user *buffer, int size, signed long *consumed)
+{
+ uint32_t cmd;
+ void __user *ptr = buffer + *consumed;
+ void __user *end = buffer + size;
+
+ while (ptr < end && thread->return_error == BR_OK) {
+ if (get_user(cmd, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) {
+ binder_stats.bc[_IOC_NR(cmd)]++;
+ proc->stats.bc[_IOC_NR(cmd)]++;
+ thread->stats.bc[_IOC_NR(cmd)]++;
+ }
+ switch (cmd) {
+ case BC_INCREFS:
+ case BC_ACQUIRE:
+ case BC_RELEASE:
+ case BC_DECREFS: {
+ uint32_t target;
+ struct binder_ref *ref;
+ const char *debug_string;
+
+ if (get_user(target, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (target == 0 && binder_context_mgr_node &&
+ (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) {
+ ref = binder_get_ref_for_node(proc,
+ binder_context_mgr_node);
+ if (ref->desc != target) {
+ binder_user_error("binder: %d:"
+ "%d tried to acquire "
+ "reference to desc 0, "
+ "got %d instead\n",
+ proc->pid, thread->pid,
+ ref->desc);
+ }
+ } else
+ ref = binder_get_ref(proc, target);
+ if (ref == NULL) {
+ binder_user_error("binder: %d:%d refcou"
+ "nt change on invalid ref %d\n",
+ proc->pid, thread->pid, target);
+ break;
+ }
+ switch (cmd) {
+ case BC_INCREFS:
+ debug_string = "IncRefs";
+ binder_inc_ref(ref, 0, NULL);
+ break;
+ case BC_ACQUIRE:
+ debug_string = "Acquire";
+ binder_inc_ref(ref, 1, NULL);
+ break;
+ case BC_RELEASE:
+ debug_string = "Release";
+ binder_dec_ref(ref, 1);
+ break;
+ case BC_DECREFS:
+ default:
+ debug_string = "DecRefs";
+ binder_dec_ref(ref, 0);
+ break;
+ }
+ if (binder_debug_mask & BINDER_DEBUG_USER_REFS)
+ printk(KERN_INFO "binder: %d:%d %s ref %d desc %d s %d w %d for node %d\n",
+ proc->pid, thread->pid, debug_string, ref->debug_id, ref->desc, ref->strong, ref->weak, ref->node->debug_id);
+ break;
+ }
+ case BC_INCREFS_DONE:
+ case BC_ACQUIRE_DONE: {
+ void __user *node_ptr;
+ void *cookie;
+ struct binder_node *node;
+
+ if (get_user(node_ptr, (void * __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(void *);
+ if (get_user(cookie, (void * __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(void *);
+ node = binder_get_node(proc, node_ptr);
+ if (node == NULL) {
+ binder_user_error("binder: %d:%d "
+ "%s u%p no match\n",
+ proc->pid, thread->pid,
+ cmd == BC_INCREFS_DONE ?
+ "BC_INCREFS_DONE" :
+ "BC_ACQUIRE_DONE",
+ node_ptr);
+ break;
+ }
+ if (cookie != node->cookie) {
+ binder_user_error("binder: %d:%d %s u%p node %d"
+ " cookie mismatch %p != %p\n",
+ proc->pid, thread->pid,
+ cmd == BC_INCREFS_DONE ?
+ "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
+ node_ptr, node->debug_id,
+ cookie, node->cookie);
+ break;
+ }
+ if (cmd == BC_ACQUIRE_DONE) {
+ if (node->pending_strong_ref == 0) {
+ binder_user_error("binder: %d:%d "
+ "BC_ACQUIRE_DONE node %d has "
+ "no pending acquire request\n",
+ proc->pid, thread->pid,
+ node->debug_id);
+ break;
+ }
+ node->pending_strong_ref = 0;
+ } else {
+ if (node->pending_weak_ref == 0) {
+ binder_user_error("binder: %d:%d "
+ "BC_INCREFS_DONE node %d has "
+ "no pending increfs request\n",
+ proc->pid, thread->pid,
+ node->debug_id);
+ break;
+ }
+ node->pending_weak_ref = 0;
+ }
+ binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0);
+ if (binder_debug_mask & BINDER_DEBUG_USER_REFS)
+ printk(KERN_INFO "binder: %d:%d %s node %d ls %d lw %d\n",
+ proc->pid, thread->pid, cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", node->debug_id, node->local_strong_refs, node->local_weak_refs);
+ break;
+ }
+ case BC_ATTEMPT_ACQUIRE:
+ printk(KERN_ERR "binder: BC_ATTEMPT_ACQUIRE not supported\n");
+ return -EINVAL;
+ case BC_ACQUIRE_RESULT:
+ printk(KERN_ERR "binder: BC_ACQUIRE_RESULT not supported\n");
+ return -EINVAL;
+
+ case BC_FREE_BUFFER: {
+ void __user *data_ptr;
+ struct binder_buffer *buffer;
+
+ if (get_user(data_ptr, (void * __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(void *);
+
+ buffer = binder_buffer_lookup(proc, data_ptr);
+ if (buffer == NULL) {
+ binder_user_error("binder: %d:%d "
+ "BC_FREE_BUFFER u%p no match\n",
+ proc->pid, thread->pid, data_ptr);
+ break;
+ }
+ if (!buffer->allow_user_free) {
+ binder_user_error("binder: %d:%d "
+ "BC_FREE_BUFFER u%p matched "
+ "unreturned buffer\n",
+ proc->pid, thread->pid, data_ptr);
+ break;
+ }
+ if (binder_debug_mask & BINDER_DEBUG_FREE_BUFFER)
+ printk(KERN_INFO "binder: %d:%d BC_FREE_BUFFER u%p found buffer %d for %s transaction\n",
+ proc->pid, thread->pid, data_ptr, buffer->debug_id,
+ buffer->transaction ? "active" : "finished");
+
+ if (buffer->transaction) {
+ buffer->transaction->buffer = NULL;
+ buffer->transaction = NULL;
+ }
+ if (buffer->async_transaction && buffer->target_node) {
+ BUG_ON(!buffer->target_node->has_async_transaction);
+ if (list_empty(&buffer->target_node->async_todo))
+ buffer->target_node->has_async_transaction = 0;
+ else
+ list_move_tail(buffer->target_node->async_todo.next, &thread->todo);
+ }
+ binder_transaction_buffer_release(proc, buffer, NULL);
+ binder_free_buf(proc, buffer);
+ break;
+ }
+
+ case BC_TRANSACTION:
+ case BC_REPLY: {
+ struct binder_transaction_data tr;
+
+ if (copy_from_user(&tr, ptr, sizeof(tr)))
+ return -EFAULT;
+ ptr += sizeof(tr);
+ binder_transaction(proc, thread, &tr, cmd == BC_REPLY);
+ break;
+ }
+
+ case BC_REGISTER_LOOPER:
+ if (binder_debug_mask & BINDER_DEBUG_THREADS)
+ printk(KERN_INFO "binder: %d:%d BC_REGISTER_LOOPER\n",
+ proc->pid, thread->pid);
+ if (thread->looper & BINDER_LOOPER_STATE_ENTERED) {
+ thread->looper |= BINDER_LOOPER_STATE_INVALID;
+ binder_user_error("binder: %d:%d ERROR:"
+ " BC_REGISTER_LOOPER called "
+ "after BC_ENTER_LOOPER\n",
+ proc->pid, thread->pid);
+ } else if (proc->requested_threads == 0) {
+ thread->looper |= BINDER_LOOPER_STATE_INVALID;
+ binder_user_error("binder: %d:%d ERROR:"
+ " BC_REGISTER_LOOPER called "
+ "without request\n",
+ proc->pid, thread->pid);
+ } else {
+ proc->requested_threads--;
+ proc->requested_threads_started++;
+ }
+ thread->looper |= BINDER_LOOPER_STATE_REGISTERED;
+ break;
+ case BC_ENTER_LOOPER:
+ if (binder_debug_mask & BINDER_DEBUG_THREADS)
+ printk(KERN_INFO "binder: %d:%d BC_ENTER_LOOPER\n",
+ proc->pid, thread->pid);
+ if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) {
+ thread->looper |= BINDER_LOOPER_STATE_INVALID;
+ binder_user_error("binder: %d:%d ERROR:"
+ " BC_ENTER_LOOPER called after "
+ "BC_REGISTER_LOOPER\n",
+ proc->pid, thread->pid);
+ }
+ thread->looper |= BINDER_LOOPER_STATE_ENTERED;
+ break;
+ case BC_EXIT_LOOPER:
+ if (binder_debug_mask & BINDER_DEBUG_THREADS)
+ printk(KERN_INFO "binder: %d:%d BC_EXIT_LOOPER\n",
+ proc->pid, thread->pid);
+ thread->looper |= BINDER_LOOPER_STATE_EXITED;
+ break;
+
+ case BC_REQUEST_DEATH_NOTIFICATION:
+ case BC_CLEAR_DEATH_NOTIFICATION: {
+ uint32_t target;
+ void __user *cookie;
+ struct binder_ref *ref;
+ struct binder_ref_death *death;
+
+ if (get_user(target, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (get_user(cookie, (void __user * __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(void *);
+ ref = binder_get_ref(proc, target);
+ if (ref == NULL) {
+ binder_user_error("binder: %d:%d %s "
+ "invalid ref %d\n",
+ proc->pid, thread->pid,
+ cmd == BC_REQUEST_DEATH_NOTIFICATION ?
+ "BC_REQUEST_DEATH_NOTIFICATION" :
+ "BC_CLEAR_DEATH_NOTIFICATION",
+ target);
+ break;
+ }
+
+ if (binder_debug_mask & BINDER_DEBUG_DEATH_NOTIFICATION)
+ printk(KERN_INFO "binder: %d:%d %s %p ref %d desc %d s %d w %d for node %d\n",
+ proc->pid, thread->pid,
+ cmd == BC_REQUEST_DEATH_NOTIFICATION ?
+ "BC_REQUEST_DEATH_NOTIFICATION" :
+ "BC_CLEAR_DEATH_NOTIFICATION",
+ cookie, ref->debug_id, ref->desc,
+ ref->strong, ref->weak, ref->node->debug_id);
+
+ if (cmd == BC_REQUEST_DEATH_NOTIFICATION) {
+ if (ref->death) {
+ binder_user_error("binder: %d:%"
+ "d BC_REQUEST_DEATH_NOTI"
+ "FICATION death notific"
+ "ation already set\n",
+ proc->pid, thread->pid);
+ break;
+ }
+ death = kzalloc(sizeof(*death), GFP_KERNEL);
+ if (death == NULL) {
+ thread->return_error = BR_ERROR;
+ if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION)
+ printk(KERN_INFO "binder: %d:%d "
+ "BC_REQUEST_DEATH_NOTIFICATION failed\n",
+ proc->pid, thread->pid);
+ break;
+ }
+ binder_stats.obj_created[BINDER_STAT_DEATH]++;
+ INIT_LIST_HEAD(&death->work.entry);
+ death->cookie = cookie;
+ ref->death = death;
+ if (ref->node->proc == NULL) {
+ ref->death->work.type = BINDER_WORK_DEAD_BINDER;
+ if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
+ list_add_tail(&ref->death->work.entry, &thread->todo);
+ } else {
+ list_add_tail(&ref->death->work.entry, &proc->todo);
+ wake_up_interruptible(&proc->wait);
+ }
+ }
+ } else {
+ if (ref->death == NULL) {
+ binder_user_error("binder: %d:%"
+ "d BC_CLEAR_DEATH_NOTIFI"
+ "CATION death notificat"
+ "ion not active\n",
+ proc->pid, thread->pid);
+ break;
+ }
+ death = ref->death;
+ if (death->cookie != cookie) {
+ binder_user_error("binder: %d:%"
+ "d BC_CLEAR_DEATH_NOTIFI"
+ "CATION death notificat"
+ "ion cookie mismatch "
+ "%p != %p\n",
+ proc->pid, thread->pid,
+ death->cookie, cookie);
+ break;
+ }
+ ref->death = NULL;
+ if (list_empty(&death->work.entry)) {
+ death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
+ if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
+ list_add_tail(&death->work.entry, &thread->todo);
+ } else {
+ list_add_tail(&death->work.entry, &proc->todo);
+ wake_up_interruptible(&proc->wait);
+ }
+ } else {
+ BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER);
+ death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR;
+ }
+ }
+ } break;
+ case BC_DEAD_BINDER_DONE: {
+ struct binder_work *w;
+ void __user *cookie;
+ struct binder_ref_death *death = NULL;
+ if (get_user(cookie, (void __user * __user *)ptr))
+ return -EFAULT;
+
+ ptr += sizeof(void *);
+ list_for_each_entry(w, &proc->delivered_death, entry) {
+ struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work);
+ if (tmp_death->cookie == cookie) {
+ death = tmp_death;
+ break;
+ }
+ }
+ if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+ printk(KERN_INFO "binder: %d:%d BC_DEAD_BINDER_DONE %p found %p\n",
+ proc->pid, thread->pid, cookie, death);
+ if (death == NULL) {
+ binder_user_error("binder: %d:%d BC_DEAD"
+ "_BINDER_DONE %p not found\n",
+ proc->pid, thread->pid, cookie);
+ break;
+ }
+
+ list_del_init(&death->work.entry);
+ if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) {
+ death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
+ if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
+ list_add_tail(&death->work.entry, &thread->todo);
+ } else {
+ list_add_tail(&death->work.entry, &proc->todo);
+ wake_up_interruptible(&proc->wait);
+ }
+ }
+ } break;
+
+ default:
+ printk(KERN_ERR "binder: %d:%d unknown command %d\n",
+ proc->pid, thread->pid, cmd);
+ return -EINVAL;
+ }
+ *consumed = ptr - buffer;
+ }
+ return 0;
+}
+
+void binder_stat_br(struct binder_proc *proc, struct binder_thread *thread,
+ uint32_t cmd)
+{
+ if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) {
+ binder_stats.br[_IOC_NR(cmd)]++;
+ proc->stats.br[_IOC_NR(cmd)]++;
+ thread->stats.br[_IOC_NR(cmd)]++;
+ }
+}
+
+static int binder_has_proc_work(struct binder_proc *proc,
+ struct binder_thread *thread)
+{
+ return !list_empty(&proc->todo) ||
+ (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
+}
+
+static int binder_has_thread_work(struct binder_thread *thread)
+{
+ return !list_empty(&thread->todo) || thread->return_error != BR_OK ||
+ (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
+}
+
+static int binder_thread_read(struct binder_proc *proc,
+ struct binder_thread *thread,
+ void __user *buffer, int size,
+ signed long *consumed, int non_block)
+{
+ void __user *ptr = buffer + *consumed;
+ void __user *end = buffer + size;
+
+ int ret = 0;
+ int wait_for_proc_work;
+
+ if (*consumed == 0) {
+ if (put_user(BR_NOOP, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ }
+
+retry:
+ wait_for_proc_work = thread->transaction_stack == NULL &&
+ list_empty(&thread->todo);
+
+ if (thread->return_error != BR_OK && ptr < end) {
+ if (thread->return_error2 != BR_OK) {
+ if (put_user(thread->return_error2, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (ptr == end)
+ goto done;
+ thread->return_error2 = BR_OK;
+ }
+ if (put_user(thread->return_error, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ thread->return_error = BR_OK;
+ goto done;
+ }
+
+
+ thread->looper |= BINDER_LOOPER_STATE_WAITING;
+ if (wait_for_proc_work)
+ proc->ready_threads++;
+ mutex_unlock(&binder_lock);
+ if (wait_for_proc_work) {
+ if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
+ BINDER_LOOPER_STATE_ENTERED))) {
+ binder_user_error("binder: %d:%d ERROR: Thread waiting "
+ "for process work before calling BC_REGISTER_"
+ "LOOPER or BC_ENTER_LOOPER (state %x)\n",
+ proc->pid, thread->pid, thread->looper);
+ wait_event_interruptible(binder_user_error_wait,
+ binder_stop_on_user_error < 2);
+ }
+ binder_set_nice(proc->default_priority);
+ if (non_block) {
+ if (!binder_has_proc_work(proc, thread))
+ ret = -EAGAIN;
+ } else
+ ret = wait_event_interruptible_exclusive(proc->wait, binder_has_proc_work(proc, thread));
+ } else {
+ if (non_block) {
+ if (!binder_has_thread_work(thread))
+ ret = -EAGAIN;
+ } else
+ ret = wait_event_interruptible(thread->wait, binder_has_thread_work(thread));
+ }
+ mutex_lock(&binder_lock);
+ if (wait_for_proc_work)
+ proc->ready_threads--;
+ thread->looper &= ~BINDER_LOOPER_STATE_WAITING;
+
+ if (ret)
+ return ret;
+
+ while (1) {
+ uint32_t cmd;
+ struct binder_transaction_data tr;
+ struct binder_work *w;
+ struct binder_transaction *t = NULL;
+
+ if (!list_empty(&thread->todo))
+ w = list_first_entry(&thread->todo, struct binder_work, entry);
+ else if (!list_empty(&proc->todo) && wait_for_proc_work)
+ w = list_first_entry(&proc->todo, struct binder_work, entry);
+ else {
+ if (ptr - buffer == 4 && !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN)) /* no data added */
+ goto retry;
+ break;
+ }
+
+ if (end - ptr < sizeof(tr) + 4)
+ break;
+
+ switch (w->type) {
+ case BINDER_WORK_TRANSACTION: {
+ t = container_of(w, struct binder_transaction, work);
+ } break;
+ case BINDER_WORK_TRANSACTION_COMPLETE: {
+ cmd = BR_TRANSACTION_COMPLETE;
+ if (put_user(cmd, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+
+ binder_stat_br(proc, thread, cmd);
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION_COMPLETE)
+ printk(KERN_INFO "binder: %d:%d BR_TRANSACTION_COMPLETE\n",
+ proc->pid, thread->pid);
+
+ list_del(&w->entry);
+ kfree(w);
+ binder_stats.obj_deleted[BINDER_STAT_TRANSACTION_COMPLETE]++;
+ } break;
+ case BINDER_WORK_NODE: {
+ struct binder_node *node = container_of(w, struct binder_node, work);
+ uint32_t cmd = BR_NOOP;
+ const char *cmd_name;
+ int strong = node->internal_strong_refs || node->local_strong_refs;
+ int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong;
+ if (weak && !node->has_weak_ref) {
+ cmd = BR_INCREFS;
+ cmd_name = "BR_INCREFS";
+ node->has_weak_ref = 1;
+ node->pending_weak_ref = 1;
+ node->local_weak_refs++;
+ } else if (strong && !node->has_strong_ref) {
+ cmd = BR_ACQUIRE;
+ cmd_name = "BR_ACQUIRE";
+ node->has_strong_ref = 1;
+ node->pending_strong_ref = 1;
+ node->local_strong_refs++;
+ } else if (!strong && node->has_strong_ref) {
+ cmd = BR_RELEASE;
+ cmd_name = "BR_RELEASE";
+ node->has_strong_ref = 0;
+ } else if (!weak && node->has_weak_ref) {
+ cmd = BR_DECREFS;
+ cmd_name = "BR_DECREFS";
+ node->has_weak_ref = 0;
+ }
+ if (cmd != BR_NOOP) {
+ if (put_user(cmd, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (put_user(node->ptr, (void * __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(void *);
+ if (put_user(node->cookie, (void * __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(void *);
+
+ binder_stat_br(proc, thread, cmd);
+ if (binder_debug_mask & BINDER_DEBUG_USER_REFS)
+ printk(KERN_INFO "binder: %d:%d %s %d u%p c%p\n",
+ proc->pid, thread->pid, cmd_name, node->debug_id, node->ptr, node->cookie);
+ } else {
+ list_del_init(&w->entry);
+ if (!weak && !strong) {
+ if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+ printk(KERN_INFO "binder: %d:%d node %d u%p c%p deleted\n",
+ proc->pid, thread->pid, node->debug_id, node->ptr, node->cookie);
+ rb_erase(&node->rb_node, &proc->nodes);
+ kfree(node);
+ binder_stats.obj_deleted[BINDER_STAT_NODE]++;
+ } else {
+ if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+ printk(KERN_INFO "binder: %d:%d node %d u%p c%p state unchanged\n",
+ proc->pid, thread->pid, node->debug_id, node->ptr, node->cookie);
+ }
+ }
+ } break;
+ case BINDER_WORK_DEAD_BINDER:
+ case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
+ case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
+ struct binder_ref_death *death;
+ uint32_t cmd;
+
+ death = container_of(w, struct binder_ref_death, work);
+ if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION)
+ cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE;
+ else
+ cmd = BR_DEAD_BINDER;
+ if (put_user(cmd, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (put_user(death->cookie, (void * __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(void *);
+ if (binder_debug_mask & BINDER_DEBUG_DEATH_NOTIFICATION)
+ printk(KERN_INFO "binder: %d:%d %s %p\n",
+ proc->pid, thread->pid,
+ cmd == BR_DEAD_BINDER ?
+ "BR_DEAD_BINDER" :
+ "BR_CLEAR_DEATH_NOTIFICATION_DONE",
+ death->cookie);
+
+ if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) {
+ list_del(&w->entry);
+ kfree(death);
+ binder_stats.obj_deleted[BINDER_STAT_DEATH]++;
+ } else
+ list_move(&w->entry, &proc->delivered_death);
+ if (cmd == BR_DEAD_BINDER)
+ goto done; /* DEAD_BINDER notifications can cause transactions */
+ } break;
+ }
+
+ if (!t)
+ continue;
+
+ BUG_ON(t->buffer == NULL);
+ if (t->buffer->target_node) {
+ struct binder_node *target_node = t->buffer->target_node;
+ tr.target.ptr = target_node->ptr;
+ tr.cookie = target_node->cookie;
+ t->saved_priority = task_nice(current);
+ if (t->priority < target_node->min_priority &&
+ !(t->flags & TF_ONE_WAY))
+ binder_set_nice(t->priority);
+ else if (!(t->flags & TF_ONE_WAY) ||
+ t->saved_priority > target_node->min_priority)
+ binder_set_nice(target_node->min_priority);
+ cmd = BR_TRANSACTION;
+ } else {
+ tr.target.ptr = NULL;
+ tr.cookie = NULL;
+ cmd = BR_REPLY;
+ }
+ tr.code = t->code;
+ tr.flags = t->flags;
+ tr.sender_euid = t->sender_euid;
+
+ if (t->from) {
+ struct task_struct *sender = t->from->proc->tsk;
+ tr.sender_pid = task_tgid_nr_ns(sender,
+ current->nsproxy->pid_ns);
+ } else {
+ tr.sender_pid = 0;
+ }
+
+ tr.data_size = t->buffer->data_size;
+ tr.offsets_size = t->buffer->offsets_size;
+ tr.data.ptr.buffer = (void *)t->buffer->data +
+ proc->user_buffer_offset;
+ tr.data.ptr.offsets = tr.data.ptr.buffer +
+ ALIGN(t->buffer->data_size,
+ sizeof(void *));
+
+ if (put_user(cmd, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (copy_to_user(ptr, &tr, sizeof(tr)))
+ return -EFAULT;
+ ptr += sizeof(tr);
+
+ binder_stat_br(proc, thread, cmd);
+ if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+ printk(KERN_INFO "binder: %d:%d %s %d %d:%d, cmd %d"
+ "size %zd-%zd ptr %p-%p\n",
+ proc->pid, thread->pid,
+ (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" :
+ "BR_REPLY",
+ t->debug_id, t->from ? t->from->proc->pid : 0,
+ t->from ? t->from->pid : 0, cmd,
+ t->buffer->data_size, t->buffer->offsets_size,
+ tr.data.ptr.buffer, tr.data.ptr.offsets);
+
+ list_del(&t->work.entry);
+ t->buffer->allow_user_free = 1;
+ if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) {
+ t->to_parent = thread->transaction_stack;
+ t->to_thread = thread;
+ thread->transaction_stack = t;
+ } else {
+ t->buffer->transaction = NULL;
+ kfree(t);
+ binder_stats.obj_deleted[BINDER_STAT_TRANSACTION]++;
+ }
+ break;
+ }
+
+done:
+
+ *consumed = ptr - buffer;
+ if (proc->requested_threads + proc->ready_threads == 0 &&
+ proc->requested_threads_started < proc->max_threads &&
+ (thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
+ BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */
+ /*spawn a new thread if we leave this out */) {
+ proc->requested_threads++;
+ if (binder_debug_mask & BINDER_DEBUG_THREADS)
+ printk(KERN_INFO "binder: %d:%d BR_SPAWN_LOOPER\n",
+ proc->pid, thread->pid);
+ if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static void binder_release_work(struct list_head *list)
+{
+ struct binder_work *w;
+ while (!list_empty(list)) {
+ w = list_first_entry(list, struct binder_work, entry);
+ list_del_init(&w->entry);
+ switch (w->type) {
+ case BINDER_WORK_TRANSACTION: {
+ struct binder_transaction *t;
+
+ t = container_of(w, struct binder_transaction, work);
+ if (t->buffer->target_node && !(t->flags & TF_ONE_WAY))
+ binder_send_failed_reply(t, BR_DEAD_REPLY);
+ } break;
+ case BINDER_WORK_TRANSACTION_COMPLETE: {
+ kfree(w);
+ binder_stats.obj_deleted[BINDER_STAT_TRANSACTION_COMPLETE]++;
+ } break;
+ default:
+ break;
+ }
+ }
+
+}
+
+static struct binder_thread *binder_get_thread(struct binder_proc *proc)
+{
+ struct binder_thread *thread = NULL;
+ struct rb_node *parent = NULL;
+ struct rb_node **p = &proc->threads.rb_node;
+
+ while (*p) {
+ parent = *p;
+ thread = rb_entry(parent, struct binder_thread, rb_node);
+
+ if (current->pid < thread->pid)
+ p = &(*p)->rb_left;
+ else if (current->pid > thread->pid)
+ p = &(*p)->rb_right;
+ else
+ break;
+ }
+ if (*p == NULL) {
+ thread = kzalloc(sizeof(*thread), GFP_KERNEL);
+ if (thread == NULL)
+ return NULL;
+ binder_stats.obj_created[BINDER_STAT_THREAD]++;
+ thread->proc = proc;
+ thread->pid = current->pid;
+ init_waitqueue_head(&thread->wait);
+ INIT_LIST_HEAD(&thread->todo);
+ rb_link_node(&thread->rb_node, parent, p);
+ rb_insert_color(&thread->rb_node, &proc->threads);
+ thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
+ thread->return_error = BR_OK;
+ thread->return_error2 = BR_OK;
+ }
+ return thread;
+}
+
+static int binder_free_thread(struct binder_proc *proc,
+ struct binder_thread *thread)
+{
+ struct binder_transaction *t;
+ struct binder_transaction *send_reply = NULL;
+ int active_transactions = 0;
+
+ rb_erase(&thread->rb_node, &proc->threads);
+ t = thread->transaction_stack;
+ if (t && t->to_thread == thread)
+ send_reply = t;
+ while (t) {
+ active_transactions++;
+ if (binder_debug_mask & BINDER_DEBUG_DEAD_TRANSACTION)
+ printk(KERN_INFO "binder: release %d:%d transaction %d "
+ "%s, still active\n", proc->pid, thread->pid,
+ t->debug_id,
+ (t->to_thread == thread) ? "in" : "out");
+ if (t->to_thread == thread) {
+ t->to_proc = NULL;
+ t->to_thread = NULL;
+ if (t->buffer) {
+ t->buffer->transaction = NULL;
+ t->buffer = NULL;
+ }
+ t = t->to_parent;
+ } else if (t->from == thread) {
+ t->from = NULL;
+ t = t->from_parent;
+ } else
+ BUG();
+ }
+ if (send_reply)
+ binder_send_failed_reply(send_reply, BR_DEAD_REPLY);
+ binder_release_work(&thread->todo);
+ kfree(thread);
+ binder_stats.obj_deleted[BINDER_STAT_THREAD]++;
+ return active_transactions;
+}
+
+static unsigned int binder_poll(struct file *filp,
+ struct poll_table_struct *wait)
+{
+ struct binder_proc *proc = filp->private_data;
+ struct binder_thread *thread = NULL;
+ int wait_for_proc_work;
+
+ mutex_lock(&binder_lock);
+ thread = binder_get_thread(proc);
+
+ wait_for_proc_work = thread->transaction_stack == NULL &&
+ list_empty(&thread->todo) && thread->return_error == BR_OK;
+ mutex_unlock(&binder_lock);
+
+ if (wait_for_proc_work) {
+ if (binder_has_proc_work(proc, thread))
+ return POLLIN;
+ poll_wait(filp, &proc->wait, wait);
+ if (binder_has_proc_work(proc, thread))
+ return POLLIN;
+ } else {
+ if (binder_has_thread_work(thread))
+ return POLLIN;
+ poll_wait(filp, &thread->wait, wait);
+ if (binder_has_thread_work(thread))
+ return POLLIN;
+ }
+ return 0;
+}
+
+static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ int ret;
+ struct binder_proc *proc = filp->private_data;
+ struct binder_thread *thread;
+ unsigned int size = _IOC_SIZE(cmd);
+ void __user *ubuf = (void __user *)arg;
+
+ /*printk(KERN_INFO "binder_ioctl: %d:%d %x %lx\n", proc->pid, current->pid, cmd, arg);*/
+
+ ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
+ if (ret)
+ return ret;
+
+ mutex_lock(&binder_lock);
+ thread = binder_get_thread(proc);
+ if (thread == NULL) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ switch (cmd) {
+ case BINDER_WRITE_READ: {
+ struct binder_write_read bwr;
+ if (size != sizeof(struct binder_write_read)) {
+ ret = -EINVAL;
+ goto err;
+ }
+ if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
+ ret = -EFAULT;
+ goto err;
+ }
+ if (binder_debug_mask & BINDER_DEBUG_READ_WRITE)
+ printk(KERN_INFO "binder: %d:%d write %ld at %08lx, read %ld at %08lx\n",
+ proc->pid, thread->pid, bwr.write_size, bwr.write_buffer, bwr.read_size, bwr.read_buffer);
+ if (bwr.write_size > 0) {
+ ret = binder_thread_write(proc, thread, (void __user *)bwr.write_buffer, bwr.write_size, &bwr.write_consumed);
+ if (ret < 0) {
+ bwr.read_consumed = 0;
+ if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
+ ret = -EFAULT;
+ goto err;
+ }
+ }
+ if (bwr.read_size > 0) {
+ ret = binder_thread_read(proc, thread, (void __user *)bwr.read_buffer, bwr.read_size, &bwr.read_consumed, filp->f_flags & O_NONBLOCK);
+ if (!list_empty(&proc->todo))
+ wake_up_interruptible(&proc->wait);
+ if (ret < 0) {
+ if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
+ ret = -EFAULT;
+ goto err;
+ }
+ }
+ if (binder_debug_mask & BINDER_DEBUG_READ_WRITE)
+ printk(KERN_INFO "binder: %d:%d wrote %ld of %ld, read return %ld of %ld\n",
+ proc->pid, thread->pid, bwr.write_consumed, bwr.write_size, bwr.read_consumed, bwr.read_size);
+ if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
+ ret = -EFAULT;
+ goto err;
+ }
+ break;
+ }
+ case BINDER_SET_MAX_THREADS:
+ if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) {
+ ret = -EINVAL;
+ goto err;
+ }
+ break;
+ case BINDER_SET_CONTEXT_MGR:
+ if (binder_context_mgr_node != NULL) {
+ printk(KERN_ERR "binder: BINDER_SET_CONTEXT_MGR already set\n");
+ ret = -EBUSY;
+ goto err;
+ }
+ if (binder_context_mgr_uid != -1) {
+ if (binder_context_mgr_uid != current->cred->euid) {
+ printk(KERN_ERR "binder: BINDER_SET_"
+ "CONTEXT_MGR bad uid %d != %d\n",
+ current->cred->euid,
+ binder_context_mgr_uid);
+ ret = -EPERM;
+ goto err;
+ }
+ } else
+ binder_context_mgr_uid = current->cred->euid;
+ binder_context_mgr_node = binder_new_node(proc, NULL, NULL);
+ if (binder_context_mgr_node == NULL) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ binder_context_mgr_node->local_weak_refs++;
+ binder_context_mgr_node->local_strong_refs++;
+ binder_context_mgr_node->has_strong_ref = 1;
+ binder_context_mgr_node->has_weak_ref = 1;
+ break;
+ case BINDER_THREAD_EXIT:
+ if (binder_debug_mask & BINDER_DEBUG_THREADS)
+ printk(KERN_INFO "binder: %d:%d exit\n",
+ proc->pid, thread->pid);
+ binder_free_thread(proc, thread);
+ thread = NULL;
+ break;
+ case BINDER_VERSION:
+ if (size != sizeof(struct binder_version)) {
+ ret = -EINVAL;
+ goto err;
+ }
+ if (put_user(BINDER_CURRENT_PROTOCOL_VERSION, &((struct binder_version *)ubuf)->protocol_version)) {
+ ret = -EINVAL;
+ goto err;
+ }
+ break;
+ default:
+ ret = -EINVAL;
+ goto err;
+ }
+ ret = 0;
+err:
+ if (thread)
+ thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN;
+ mutex_unlock(&binder_lock);
+ wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
+ if (ret && ret != -ERESTARTSYS)
+ printk(KERN_INFO "binder: %d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret);
+ return ret;
+}
+
+static void binder_vma_open(struct vm_area_struct *vma)
+{
+ struct binder_proc *proc = vma->vm_private_data;
+ if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+ printk(KERN_INFO
+ "binder: %d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
+ proc->pid, vma->vm_start, vma->vm_end,
+ (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
+ (unsigned long)pgprot_val(vma->vm_page_prot));
+ dump_stack();
+}
+
+static void binder_vma_close(struct vm_area_struct *vma)
+{
+ struct binder_proc *proc = vma->vm_private_data;
+ if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+ printk(KERN_INFO
+ "binder: %d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
+ proc->pid, vma->vm_start, vma->vm_end,
+ (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
+ (unsigned long)pgprot_val(vma->vm_page_prot));
+ proc->vma = NULL;
+ binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES);
+}
+
+static struct vm_operations_struct binder_vm_ops = {
+ .open = binder_vma_open,
+ .close = binder_vma_close,
+};
+
+static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+ int ret;
+ struct vm_struct *area;
+ struct binder_proc *proc = filp->private_data;
+ const char *failure_string;
+ struct binder_buffer *buffer;
+
+ if ((vma->vm_end - vma->vm_start) > SZ_4M)
+ vma->vm_end = vma->vm_start + SZ_4M;
+
+ if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+ printk(KERN_INFO
+ "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n",
+ proc->pid, vma->vm_start, vma->vm_end,
+ (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
+ (unsigned long)pgprot_val(vma->vm_page_prot));
+
+ if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) {
+ ret = -EPERM;
+ failure_string = "bad vm_flags";
+ goto err_bad_arg;
+ }
+ vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE;
+
+ if (proc->buffer) {
+ ret = -EBUSY;
+ failure_string = "already mapped";
+ goto err_already_mapped;
+ }
+
+ area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP);
+ if (area == NULL) {
+ ret = -ENOMEM;
+ failure_string = "get_vm_area";
+ goto err_get_vm_area_failed;
+ }
+ proc->buffer = area->addr;
+ proc->user_buffer_offset = vma->vm_start - (uintptr_t)proc->buffer;
+
+#ifdef CONFIG_CPU_CACHE_VIPT
+ if (cache_is_vipt_aliasing()) {
+ while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) {
+ printk(KERN_INFO "binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer);
+ vma->vm_start += PAGE_SIZE;
+ }
+ }
+#endif
+ proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL);
+ if (proc->pages == NULL) {
+ ret = -ENOMEM;
+ failure_string = "alloc page array";
+ goto err_alloc_pages_failed;
+ }
+ proc->buffer_size = vma->vm_end - vma->vm_start;
+
+ vma->vm_ops = &binder_vm_ops;
+ vma->vm_private_data = proc;
+
+ if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) {
+ ret = -ENOMEM;
+ failure_string = "alloc small buf";
+ goto err_alloc_small_buf_failed;
+ }
+ buffer = proc->buffer;
+ INIT_LIST_HEAD(&proc->buffers);
+ list_add(&buffer->entry, &proc->buffers);
+ buffer->free = 1;
+ binder_insert_free_buffer(proc, buffer);
+ proc->free_async_space = proc->buffer_size / 2;
+ barrier();
+ proc->files = get_files_struct(current);
+ proc->vma = vma;
+
+ /*printk(KERN_INFO "binder_mmap: %d %lx-%lx maps %p\n",
+ proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/
+ return 0;
+
+err_alloc_small_buf_failed:
+ kfree(proc->pages);
+ proc->pages = NULL;
+err_alloc_pages_failed:
+ vfree(proc->buffer);
+ proc->buffer = NULL;
+err_get_vm_area_failed:
+err_already_mapped:
+err_bad_arg:
+ printk(KERN_ERR "binder_mmap: %d %lx-%lx %s failed %d\n",
+ proc->pid, vma->vm_start, vma->vm_end, failure_string, ret);
+ return ret;
+}
+
+static int binder_open(struct inode *nodp, struct file *filp)
+{
+ struct binder_proc *proc;
+
+ if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+ printk(KERN_INFO "binder_open: %d:%d\n",
+ current->group_leader->pid, current->pid);
+
+ proc = kzalloc(sizeof(*proc), GFP_KERNEL);
+ if (proc == NULL)
+ return -ENOMEM;
+ get_task_struct(current);
+ proc->tsk = current;
+ INIT_LIST_HEAD(&proc->todo);
+ init_waitqueue_head(&proc->wait);
+ proc->default_priority = task_nice(current);
+ mutex_lock(&binder_lock);
+ binder_stats.obj_created[BINDER_STAT_PROC]++;
+ hlist_add_head(&proc->proc_node, &binder_procs);
+ proc->pid = current->group_leader->pid;
+ INIT_LIST_HEAD(&proc->delivered_death);
+ filp->private_data = proc;
+ mutex_unlock(&binder_lock);
+
+ if (binder_proc_dir_entry_proc) {
+ char strbuf[11];
+ snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
+ remove_proc_entry(strbuf, binder_proc_dir_entry_proc);
+ create_proc_read_entry(strbuf, S_IRUGO,
+ binder_proc_dir_entry_proc,
+ binder_read_proc_proc, proc);
+ }
+
+ return 0;
+}
+
+static int binder_flush(struct file *filp, fl_owner_t id)
+{
+ struct binder_proc *proc = filp->private_data;
+
+ binder_defer_work(proc, BINDER_DEFERRED_FLUSH);
+
+ return 0;
+}
+
+static void binder_deferred_flush(struct binder_proc *proc)
+{
+ struct rb_node *n;
+ int wake_count = 0;
+ for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) {
+ struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node);
+ thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
+ if (thread->looper & BINDER_LOOPER_STATE_WAITING) {
+ wake_up_interruptible(&thread->wait);
+ wake_count++;
+ }
+ }
+ wake_up_interruptible_all(&proc->wait);
+
+ if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+ printk(KERN_INFO "binder_flush: %d woke %d threads\n", proc->pid, wake_count);
+}
+
+static int binder_release(struct inode *nodp, struct file *filp)
+{
+ struct binder_proc *proc = filp->private_data;
+ if (binder_proc_dir_entry_proc) {
+ char strbuf[11];
+ snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
+ remove_proc_entry(strbuf, binder_proc_dir_entry_proc);
+ }
+
+ binder_defer_work(proc, BINDER_DEFERRED_RELEASE);
+
+ return 0;
+}
+
+static void binder_deferred_release(struct binder_proc *proc)
+{
+ struct hlist_node *pos;
+ struct binder_transaction *t;
+ struct rb_node *n;
+ int threads, nodes, incoming_refs, outgoing_refs, buffers, active_transactions, page_count;
+
+ BUG_ON(proc->vma);
+ BUG_ON(proc->files);
+
+ hlist_del(&proc->proc_node);
+ if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) {
+ if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+ printk(KERN_INFO "binder_release: %d context_mgr_node gone\n", proc->pid);
+ binder_context_mgr_node = NULL;
+ }
+
+ threads = 0;
+ active_transactions = 0;
+ while ((n = rb_first(&proc->threads))) {
+ struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node);
+ threads++;
+ active_transactions += binder_free_thread(proc, thread);
+ }
+ nodes = 0;
+ incoming_refs = 0;
+ while ((n = rb_first(&proc->nodes))) {
+ struct binder_node *node = rb_entry(n, struct binder_node, rb_node);
+
+ nodes++;
+ rb_erase(&node->rb_node, &proc->nodes);
+ list_del_init(&node->work.entry);
+ if (hlist_empty(&node->refs)) {
+ kfree(node);
+ binder_stats.obj_deleted[BINDER_STAT_NODE]++;
+ } else {
+ struct binder_ref *ref;
+ int death = 0;
+
+ node->proc = NULL;
+ node->local_strong_refs = 0;
+ node->local_weak_refs = 0;
+ hlist_add_head(&node->dead_node, &binder_dead_nodes);
+
+ hlist_for_each_entry(ref, pos, &node->refs, node_entry) {
+ incoming_refs++;
+ if (ref->death) {
+ death++;
+ if (list_empty(&ref->death->work.entry)) {
+ ref->death->work.type = BINDER_WORK_DEAD_BINDER;
+ list_add_tail(&ref->death->work.entry, &ref->proc->todo);
+ wake_up_interruptible(&ref->proc->wait);
+ } else
+ BUG();
+ }
+ }
+ if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+ printk(KERN_INFO "binder: node %d now dead, "
+ "refs %d, death %d\n", node->debug_id,
+ incoming_refs, death);
+ }
+ }
+ outgoing_refs = 0;
+ while ((n = rb_first(&proc->refs_by_desc))) {
+ struct binder_ref *ref = rb_entry(n, struct binder_ref,
+ rb_node_desc);
+ outgoing_refs++;
+ binder_delete_ref(ref);
+ }
+ binder_release_work(&proc->todo);
+ buffers = 0;
+
+ while ((n = rb_first(&proc->allocated_buffers))) {
+ struct binder_buffer *buffer = rb_entry(n, struct binder_buffer,
+ rb_node);
+ t = buffer->transaction;
+ if (t) {
+ t->buffer = NULL;
+ buffer->transaction = NULL;
+ printk(KERN_ERR "binder: release proc %d, "
+ "transaction %d, not freed\n",
+ proc->pid, t->debug_id);
+ /*BUG();*/
+ }
+ binder_free_buf(proc, buffer);
+ buffers++;
+ }
+
+ binder_stats.obj_deleted[BINDER_STAT_PROC]++;
+
+ page_count = 0;
+ if (proc->pages) {
+ int i;
+ for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) {
+ if (proc->pages[i]) {
+ if (binder_debug_mask &
+ BINDER_DEBUG_BUFFER_ALLOC)
+ printk(KERN_INFO
+ "binder_release: %d: "
+ "page %d at %p not freed\n",
+ proc->pid, i,
+ proc->buffer + i * PAGE_SIZE);
+ __free_page(proc->pages[i]);
+ page_count++;
+ }
+ }
+ kfree(proc->pages);
+ vfree(proc->buffer);
+ }
+
+ put_task_struct(proc->tsk);
+
+ if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+ printk(KERN_INFO
+ "binder_release: %d threads %d, nodes %d (ref %d), "
+ "refs %d, active transactions %d, buffers %d, "
+ "pages %d\n",
+ proc->pid, threads, nodes, incoming_refs, outgoing_refs,
+ active_transactions, buffers, page_count);
+
+ kfree(proc);
+}
+
+static void binder_deferred_func(struct work_struct *work)
+{
+ struct binder_proc *proc;
+ struct files_struct *files;
+
+ int defer;
+ do {
+ mutex_lock(&binder_lock);
+ mutex_lock(&binder_deferred_lock);
+ if (!hlist_empty(&binder_deferred_list)) {
+ proc = hlist_entry(binder_deferred_list.first,
+ struct binder_proc, deferred_work_node);
+ hlist_del_init(&proc->deferred_work_node);
+ defer = proc->deferred_work;
+ proc->deferred_work = 0;
+ } else {
+ proc = NULL;
+ defer = 0;
+ }
+ mutex_unlock(&binder_deferred_lock);
+
+ files = NULL;
+ if (defer & BINDER_DEFERRED_PUT_FILES) {
+ files = proc->files;
+ if (files)
+ proc->files = NULL;
+ }
+
+ if (defer & BINDER_DEFERRED_FLUSH)
+ binder_deferred_flush(proc);
+
+ if (defer & BINDER_DEFERRED_RELEASE)
+ binder_deferred_release(proc); /* frees proc */
+
+ mutex_unlock(&binder_lock);
+ if (files)
+ put_files_struct(files);
+ } while (proc);
+}
+static DECLARE_WORK(binder_deferred_work, binder_deferred_func);
+
+static void binder_defer_work(struct binder_proc *proc, int defer)
+{
+ mutex_lock(&binder_deferred_lock);
+ proc->deferred_work |= defer;
+ if (hlist_unhashed(&proc->deferred_work_node)) {
+ hlist_add_head(&proc->deferred_work_node,
+ &binder_deferred_list);
+ schedule_work(&binder_deferred_work);
+ }
+ mutex_unlock(&binder_deferred_lock);
+}
+
+static char *print_binder_transaction(char *buf, char *end, const char *prefix,
+ struct binder_transaction *t)
+{
+ buf += snprintf(buf, end - buf,
+ "%s %d: %p from %d:%d to %d:%d code %x "
+ "flags %x pri %ld r%d",
+ prefix, t->debug_id, t,
+ t->from ? t->from->proc->pid : 0,
+ t->from ? t->from->pid : 0,
+ t->to_proc ? t->to_proc->pid : 0,
+ t->to_thread ? t->to_thread->pid : 0,
+ t->code, t->flags, t->priority, t->need_reply);
+ if (buf >= end)
+ return buf;
+ if (t->buffer == NULL) {
+ buf += snprintf(buf, end - buf, " buffer free\n");
+ return buf;
+ }
+ if (t->buffer->target_node) {
+ buf += snprintf(buf, end - buf, " node %d",
+ t->buffer->target_node->debug_id);
+ if (buf >= end)
+ return buf;
+ }
+ buf += snprintf(buf, end - buf, " size %zd:%zd data %p\n",
+ t->buffer->data_size, t->buffer->offsets_size,
+ t->buffer->data);
+ return buf;
+}
+
+static char *print_binder_buffer(char *buf, char *end, const char *prefix,
+ struct binder_buffer *buffer)
+{
+ buf += snprintf(buf, end - buf, "%s %d: %p size %zd:%zd %s\n",
+ prefix, buffer->debug_id, buffer->data,
+ buffer->data_size, buffer->offsets_size,
+ buffer->transaction ? "active" : "delivered");
+ return buf;
+}
+
+static char *print_binder_work(char *buf, char *end, const char *prefix,
+ const char *transaction_prefix,
+ struct binder_work *w)
+{
+ struct binder_node *node;
+ struct binder_transaction *t;
+
+ switch (w->type) {
+ case BINDER_WORK_TRANSACTION:
+ t = container_of(w, struct binder_transaction, work);
+ buf = print_binder_transaction(buf, end, transaction_prefix, t);
+ break;
+ case BINDER_WORK_TRANSACTION_COMPLETE:
+ buf += snprintf(buf, end - buf,
+ "%stransaction complete\n", prefix);
+ break;
+ case BINDER_WORK_NODE:
+ node = container_of(w, struct binder_node, work);
+ buf += snprintf(buf, end - buf, "%snode work %d: u%p c%p\n",
+ prefix, node->debug_id, node->ptr,
+ node->cookie);
+ break;
+ case BINDER_WORK_DEAD_BINDER:
+ buf += snprintf(buf, end - buf, "%shas dead binder\n", prefix);
+ break;
+ case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
+ buf += snprintf(buf, end - buf,
+ "%shas cleared dead binder\n", prefix);
+ break;
+ case BINDER_WORK_CLEAR_DEATH_NOTIFICATION:
+ buf += snprintf(buf, end - buf,
+ "%shas cleared death notification\n", prefix);
+ break;
+ default:
+ buf += snprintf(buf, end - buf, "%sunknown work: type %d\n",
+ prefix, w->type);
+ break;
+ }
+ return buf;
+}
+
+static char *print_binder_thread(char *buf, char *end,
+ struct binder_thread *thread,
+ int print_always)
+{
+ struct binder_transaction *t;
+ struct binder_work *w;
+ char *start_buf = buf;
+ char *header_buf;
+
+ buf += snprintf(buf, end - buf, " thread %d: l %02x\n",
+ thread->pid, thread->looper);
+ header_buf = buf;
+ t = thread->transaction_stack;
+ while (t) {
+ if (buf >= end)
+ break;
+ if (t->from == thread) {
+ buf = print_binder_transaction(buf, end,
+ " outgoing transaction", t);
+ t = t->from_parent;
+ } else if (t->to_thread == thread) {
+ buf = print_binder_transaction(buf, end,
+ " incoming transaction", t);
+ t = t->to_parent;
+ } else {
+ buf = print_binder_transaction(buf, end,
+ " bad transaction", t);
+ t = NULL;
+ }
+ }
+ list_for_each_entry(w, &thread->todo, entry) {
+ if (buf >= end)
+ break;
+ buf = print_binder_work(buf, end, " ",
+ " pending transaction", w);
+ }
+ if (!print_always && buf == header_buf)
+ buf = start_buf;
+ return buf;
+}
+
+static char *print_binder_node(char *buf, char *end, struct binder_node *node)
+{
+ struct binder_ref *ref;
+ struct hlist_node *pos;
+ struct binder_work *w;
+ int count;
+
+ count = 0;
+ hlist_for_each_entry(ref, pos, &node->refs, node_entry)
+ count++;
+
+ buf += snprintf(buf, end - buf,
+ " node %d: u%p c%p hs %d hw %d ls %d lw %d "
+ "is %d iw %d",
+ node->debug_id, node->ptr, node->cookie,
+ node->has_strong_ref, node->has_weak_ref,
+ node->local_strong_refs, node->local_weak_refs,
+ node->internal_strong_refs, count);
+ if (buf >= end)
+ return buf;
+ if (count) {
+ buf += snprintf(buf, end - buf, " proc");
+ if (buf >= end)
+ return buf;
+ hlist_for_each_entry(ref, pos, &node->refs, node_entry) {
+ buf += snprintf(buf, end - buf, " %d", ref->proc->pid);
+ if (buf >= end)
+ return buf;
+ }
+ }
+ buf += snprintf(buf, end - buf, "\n");
+ list_for_each_entry(w, &node->async_todo, entry) {
+ if (buf >= end)
+ break;
+ buf = print_binder_work(buf, end, " ",
+ " pending async transaction", w);
+ }
+ return buf;
+}
+
+static char *print_binder_ref(char *buf, char *end, struct binder_ref *ref)
+{
+ buf += snprintf(buf, end - buf,
+ " ref %d: desc %d %snode %d s %d w %d d %p\n",
+ ref->debug_id, ref->desc,
+ ref->node->proc ? "" : "dead ", ref->node->debug_id,
+ ref->strong, ref->weak, ref->death);
+ return buf;
+}
+
+static char *print_binder_proc(char *buf, char *end,
+ struct binder_proc *proc, int print_all)
+{
+ struct binder_work *w;
+ struct rb_node *n;
+ char *start_buf = buf;
+ char *header_buf;
+
+ buf += snprintf(buf, end - buf, "proc %d\n", proc->pid);
+ header_buf = buf;
+
+ for (n = rb_first(&proc->threads);
+ n != NULL && buf < end;
+ n = rb_next(n))
+ buf = print_binder_thread(buf, end,
+ rb_entry(n, struct binder_thread,
+ rb_node), print_all);
+ for (n = rb_first(&proc->nodes);
+ n != NULL && buf < end;
+ n = rb_next(n)) {
+ struct binder_node *node = rb_entry(n, struct binder_node,
+ rb_node);
+ if (print_all || node->has_async_transaction)
+ buf = print_binder_node(buf, end, node);
+ }
+ if (print_all) {
+ for (n = rb_first(&proc->refs_by_desc);
+ n != NULL && buf < end;
+ n = rb_next(n))
+ buf = print_binder_ref(buf, end,
+ rb_entry(n, struct binder_ref,
+ rb_node_desc));
+ }
+ for (n = rb_first(&proc->allocated_buffers);
+ n != NULL && buf < end;
+ n = rb_next(n))
+ buf = print_binder_buffer(buf, end, " buffer",
+ rb_entry(n, struct binder_buffer,
+ rb_node));
+ list_for_each_entry(w, &proc->todo, entry) {
+ if (buf >= end)
+ break;
+ buf = print_binder_work(buf, end, " ",
+ " pending transaction", w);
+ }
+ list_for_each_entry(w, &proc->delivered_death, entry) {
+ if (buf >= end)
+ break;
+ buf += snprintf(buf, end - buf,
+ " has delivered dead binder\n");
+ break;
+ }
+ if (!print_all && buf == header_buf)
+ buf = start_buf;
+ return buf;
+}
+
+static const char *binder_return_strings[] = {
+ "BR_ERROR",
+ "BR_OK",
+ "BR_TRANSACTION",
+ "BR_REPLY",
+ "BR_ACQUIRE_RESULT",
+ "BR_DEAD_REPLY",
+ "BR_TRANSACTION_COMPLETE",
+ "BR_INCREFS",
+ "BR_ACQUIRE",
+ "BR_RELEASE",
+ "BR_DECREFS",
+ "BR_ATTEMPT_ACQUIRE",
+ "BR_NOOP",
+ "BR_SPAWN_LOOPER",
+ "BR_FINISHED",
+ "BR_DEAD_BINDER",
+ "BR_CLEAR_DEATH_NOTIFICATION_DONE",
+ "BR_FAILED_REPLY"
+};
+
+static const char *binder_command_strings[] = {
+ "BC_TRANSACTION",
+ "BC_REPLY",
+ "BC_ACQUIRE_RESULT",
+ "BC_FREE_BUFFER",
+ "BC_INCREFS",
+ "BC_ACQUIRE",
+ "BC_RELEASE",
+ "BC_DECREFS",
+ "BC_INCREFS_DONE",
+ "BC_ACQUIRE_DONE",
+ "BC_ATTEMPT_ACQUIRE",
+ "BC_REGISTER_LOOPER",
+ "BC_ENTER_LOOPER",
+ "BC_EXIT_LOOPER",
+ "BC_REQUEST_DEATH_NOTIFICATION",
+ "BC_CLEAR_DEATH_NOTIFICATION",
+ "BC_DEAD_BINDER_DONE"
+};
+
+static const char *binder_objstat_strings[] = {
+ "proc",
+ "thread",
+ "node",
+ "ref",
+ "death",
+ "transaction",
+ "transaction_complete"
+};
+
+static char *print_binder_stats(char *buf, char *end, const char *prefix,
+ struct binder_stats *stats)
+{
+ int i;
+
+ BUILD_BUG_ON(ARRAY_SIZE(stats->bc) !=
+ ARRAY_SIZE(binder_command_strings));
+ for (i = 0; i < ARRAY_SIZE(stats->bc); i++) {
+ if (stats->bc[i])
+ buf += snprintf(buf, end - buf, "%s%s: %d\n", prefix,
+ binder_command_strings[i],
+ stats->bc[i]);
+ if (buf >= end)
+ return buf;
+ }
+
+ BUILD_BUG_ON(ARRAY_SIZE(stats->br) !=
+ ARRAY_SIZE(binder_return_strings));
+ for (i = 0; i < ARRAY_SIZE(stats->br); i++) {
+ if (stats->br[i])
+ buf += snprintf(buf, end - buf, "%s%s: %d\n", prefix,
+ binder_return_strings[i], stats->br[i]);
+ if (buf >= end)
+ return buf;
+ }
+
+ BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
+ ARRAY_SIZE(binder_objstat_strings));
+ BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
+ ARRAY_SIZE(stats->obj_deleted));
+ for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) {
+ if (stats->obj_created[i] || stats->obj_deleted[i])
+ buf += snprintf(buf, end - buf,
+ "%s%s: active %d total %d\n", prefix,
+ binder_objstat_strings[i],
+ stats->obj_created[i] -
+ stats->obj_deleted[i],
+ stats->obj_created[i]);
+ if (buf >= end)
+ return buf;
+ }
+ return buf;
+}
+
+static char *print_binder_proc_stats(char *buf, char *end,
+ struct binder_proc *proc)
+{
+ struct binder_work *w;
+ struct rb_node *n;
+ int count, strong, weak;
+
+ buf += snprintf(buf, end - buf, "proc %d\n", proc->pid);
+ if (buf >= end)
+ return buf;
+ count = 0;
+ for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
+ count++;
+ buf += snprintf(buf, end - buf, " threads: %d\n", count);
+ if (buf >= end)
+ return buf;
+ buf += snprintf(buf, end - buf, " requested threads: %d+%d/%d\n"
+ " ready threads %d\n"
+ " free async space %zd\n", proc->requested_threads,
+ proc->requested_threads_started, proc->max_threads,
+ proc->ready_threads, proc->free_async_space);
+ if (buf >= end)
+ return buf;
+ count = 0;
+ for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n))
+ count++;
+ buf += snprintf(buf, end - buf, " nodes: %d\n", count);
+ if (buf >= end)
+ return buf;
+ count = 0;
+ strong = 0;
+ weak = 0;
+ for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
+ struct binder_ref *ref = rb_entry(n, struct binder_ref,
+ rb_node_desc);
+ count++;
+ strong += ref->strong;
+ weak += ref->weak;
+ }
+ buf += snprintf(buf, end - buf, " refs: %d s %d w %d\n",
+ count, strong, weak);
+ if (buf >= end)
+ return buf;
+
+ count = 0;
+ for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
+ count++;
+ buf += snprintf(buf, end - buf, " buffers: %d\n", count);
+ if (buf >= end)
+ return buf;
+
+ count = 0;
+ list_for_each_entry(w, &proc->todo, entry) {
+ switch (w->type) {
+ case BINDER_WORK_TRANSACTION:
+ count++;
+ break;
+ default:
+ break;
+ }
+ }
+ buf += snprintf(buf, end - buf, " pending transactions: %d\n", count);
+ if (buf >= end)
+ return buf;
+
+ buf = print_binder_stats(buf, end, " ", &proc->stats);
+
+ return buf;
+}
+
+
+static int binder_read_proc_state(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct binder_proc *proc;
+ struct hlist_node *pos;
+ struct binder_node *node;
+ int len = 0;
+ char *buf = page;
+ char *end = page + PAGE_SIZE;
+ int do_lock = !binder_debug_no_lock;
+
+ if (off)
+ return 0;
+
+ if (do_lock)
+ mutex_lock(&binder_lock);
+
+ buf += snprintf(buf, end - buf, "binder state:\n");
+
+ if (!hlist_empty(&binder_dead_nodes))
+ buf += snprintf(buf, end - buf, "dead nodes:\n");
+ hlist_for_each_entry(node, pos, &binder_dead_nodes, dead_node) {
+ if (buf >= end)
+ break;
+ buf = print_binder_node(buf, end, node);
+ }
+
+ hlist_for_each_entry(proc, pos, &binder_procs, proc_node) {
+ if (buf >= end)
+ break;
+ buf = print_binder_proc(buf, end, proc, 1);
+ }
+ if (do_lock)
+ mutex_unlock(&binder_lock);
+ if (buf > page + PAGE_SIZE)
+ buf = page + PAGE_SIZE;
+
+ *start = page + off;
+
+ len = buf - page;
+ if (len > off)
+ len -= off;
+ else
+ len = 0;
+
+ return len < count ? len : count;
+}
+
+static int binder_read_proc_stats(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct binder_proc *proc;
+ struct hlist_node *pos;
+ int len = 0;
+ char *p = page;
+ int do_lock = !binder_debug_no_lock;
+
+ if (off)
+ return 0;
+
+ if (do_lock)
+ mutex_lock(&binder_lock);
+
+ p += snprintf(p, PAGE_SIZE, "binder stats:\n");
+
+ p = print_binder_stats(p, page + PAGE_SIZE, "", &binder_stats);
+
+ hlist_for_each_entry(proc, pos, &binder_procs, proc_node) {
+ if (p >= page + PAGE_SIZE)
+ break;
+ p = print_binder_proc_stats(p, page + PAGE_SIZE, proc);
+ }
+ if (do_lock)
+ mutex_unlock(&binder_lock);
+ if (p > page + PAGE_SIZE)
+ p = page + PAGE_SIZE;
+
+ *start = page + off;
+
+ len = p - page;
+ if (len > off)
+ len -= off;
+ else
+ len = 0;
+
+ return len < count ? len : count;
+}
+
+static int binder_read_proc_transactions(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct binder_proc *proc;
+ struct hlist_node *pos;
+ int len = 0;
+ char *buf = page;
+ char *end = page + PAGE_SIZE;
+ int do_lock = !binder_debug_no_lock;
+
+ if (off)
+ return 0;
+
+ if (do_lock)
+ mutex_lock(&binder_lock);
+
+ buf += snprintf(buf, end - buf, "binder transactions:\n");
+ hlist_for_each_entry(proc, pos, &binder_procs, proc_node) {
+ if (buf >= end)
+ break;
+ buf = print_binder_proc(buf, end, proc, 0);
+ }
+ if (do_lock)
+ mutex_unlock(&binder_lock);
+ if (buf > page + PAGE_SIZE)
+ buf = page + PAGE_SIZE;
+
+ *start = page + off;
+
+ len = buf - page;
+ if (len > off)
+ len -= off;
+ else
+ len = 0;
+
+ return len < count ? len : count;
+}
+
+static int binder_read_proc_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct binder_proc *proc = data;
+ int len = 0;
+ char *p = page;
+ int do_lock = !binder_debug_no_lock;
+
+ if (off)
+ return 0;
+
+ if (do_lock)
+ mutex_lock(&binder_lock);
+ p += snprintf(p, PAGE_SIZE, "binder proc state:\n");
+ p = print_binder_proc(p, page + PAGE_SIZE, proc, 1);
+ if (do_lock)
+ mutex_unlock(&binder_lock);
+
+ if (p > page + PAGE_SIZE)
+ p = page + PAGE_SIZE;
+ *start = page + off;
+
+ len = p - page;
+ if (len > off)
+ len -= off;
+ else
+ len = 0;
+
+ return len < count ? len : count;
+}
+
+static char *print_binder_transaction_log_entry(char *buf, char *end,
+ struct binder_transaction_log_entry *e)
+{
+ buf += snprintf(buf, end - buf,
+ "%d: %s from %d:%d to %d:%d node %d handle %d "
+ "size %d:%d\n",
+ e->debug_id, (e->call_type == 2) ? "reply" :
+ ((e->call_type == 1) ? "async" : "call "), e->from_proc,
+ e->from_thread, e->to_proc, e->to_thread, e->to_node,
+ e->target_handle, e->data_size, e->offsets_size);
+ return buf;
+}
+
+static int binder_read_proc_transaction_log(
+ char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ struct binder_transaction_log *log = data;
+ int len = 0;
+ int i;
+ char *buf = page;
+ char *end = page + PAGE_SIZE;
+
+ if (off)
+ return 0;
+
+ if (log->full) {
+ for (i = log->next; i < ARRAY_SIZE(log->entry); i++) {
+ if (buf >= end)
+ break;
+ buf = print_binder_transaction_log_entry(buf, end,
+ &log->entry[i]);
+ }
+ }
+ for (i = 0; i < log->next; i++) {
+ if (buf >= end)
+ break;
+ buf = print_binder_transaction_log_entry(buf, end,
+ &log->entry[i]);
+ }
+
+ *start = page + off;
+
+ len = buf - page;
+ if (len > off)
+ len -= off;
+ else
+ len = 0;
+
+ return len < count ? len : count;
+}
+
+static const struct file_operations binder_fops = {
+ .owner = THIS_MODULE,
+ .poll = binder_poll,
+ .unlocked_ioctl = binder_ioctl,
+ .mmap = binder_mmap,
+ .open = binder_open,
+ .flush = binder_flush,
+ .release = binder_release,
+};
+
+static struct miscdevice binder_miscdev = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "binder",
+ .fops = &binder_fops
+};
+
+static int __init binder_init(void)
+{
+ int ret;
+
+ binder_proc_dir_entry_root = proc_mkdir("binder", NULL);
+ if (binder_proc_dir_entry_root)
+ binder_proc_dir_entry_proc = proc_mkdir("proc",
+ binder_proc_dir_entry_root);
+ ret = misc_register(&binder_miscdev);
+ if (binder_proc_dir_entry_root) {
+ create_proc_read_entry("state",
+ S_IRUGO,
+ binder_proc_dir_entry_root,
+ binder_read_proc_state,
+ NULL);
+ create_proc_read_entry("stats",
+ S_IRUGO,
+ binder_proc_dir_entry_root,
+ binder_read_proc_stats,
+ NULL);
+ create_proc_read_entry("transactions",
+ S_IRUGO,
+ binder_proc_dir_entry_root,
+ binder_read_proc_transactions,
+ NULL);
+ create_proc_read_entry("transaction_log",
+ S_IRUGO,
+ binder_proc_dir_entry_root,
+ binder_read_proc_transaction_log,
+ &binder_transaction_log);
+ create_proc_read_entry("failed_transaction_log",
+ S_IRUGO,
+ binder_proc_dir_entry_root,
+ binder_read_proc_transaction_log,
+ &binder_transaction_log_failed);
+ }
+ return ret;
+}
+
+device_initcall(binder_init);
+
+MODULE_LICENSE("GPL v2");
diff --git a/stblinux-2.6.37/drivers/staging/android/binder.h b/stblinux-2.6.37/drivers/staging/android/binder.h
new file mode 100644
index 0000000..863ae1a
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/binder.h
@@ -0,0 +1,330 @@
+/*
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * Based on, but no longer compatible with, the original
+ * OpenBinder.org binder driver interface, which is:
+ *
+ * Copyright (c) 2005 Palmsource, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _LINUX_BINDER_H
+#define _LINUX_BINDER_H
+
+#include <linux/ioctl.h>
+
+#define B_PACK_CHARS(c1, c2, c3, c4) \
+ ((((c1)<<24)) | (((c2)<<16)) | (((c3)<<8)) | (c4))
+#define B_TYPE_LARGE 0x85
+
+enum {
+ BINDER_TYPE_BINDER = B_PACK_CHARS('s', 'b', '*', B_TYPE_LARGE),
+ BINDER_TYPE_WEAK_BINDER = B_PACK_CHARS('w', 'b', '*', B_TYPE_LARGE),
+ BINDER_TYPE_HANDLE = B_PACK_CHARS('s', 'h', '*', B_TYPE_LARGE),
+ BINDER_TYPE_WEAK_HANDLE = B_PACK_CHARS('w', 'h', '*', B_TYPE_LARGE),
+ BINDER_TYPE_FD = B_PACK_CHARS('f', 'd', '*', B_TYPE_LARGE),
+};
+
+enum {
+ FLAT_BINDER_FLAG_PRIORITY_MASK = 0xff,
+ FLAT_BINDER_FLAG_ACCEPTS_FDS = 0x100,
+};
+
+/*
+ * This is the flattened representation of a Binder object for transfer
+ * between processes. The 'offsets' supplied as part of a binder transaction
+ * contains offsets into the data where these structures occur. The Binder
+ * driver takes care of re-writing the structure type and data as it moves
+ * between processes.
+ */
+struct flat_binder_object {
+ /* 8 bytes for large_flat_header. */
+ unsigned long type;
+ unsigned long flags;
+
+ /* 8 bytes of data. */
+ union {
+ void *binder; /* local object */
+ signed long handle; /* remote object */
+ };
+
+ /* extra data associated with local object */
+ void *cookie;
+};
+
+/*
+ * On 64-bit platforms where user code may run in 32-bits the driver must
+ * translate the buffer (and local binder) addresses apropriately.
+ */
+
+struct binder_write_read {
+ signed long write_size; /* bytes to write */
+ signed long write_consumed; /* bytes consumed by driver */
+ unsigned long write_buffer;
+ signed long read_size; /* bytes to read */
+ signed long read_consumed; /* bytes consumed by driver */
+ unsigned long read_buffer;
+};
+
+/* Use with BINDER_VERSION, driver fills in fields. */
+struct binder_version {
+ /* driver protocol version -- increment with incompatible change */
+ signed long protocol_version;
+};
+
+/* This is the current protocol version. */
+#define BINDER_CURRENT_PROTOCOL_VERSION 7
+
+#define BINDER_WRITE_READ _IOWR('b', 1, struct binder_write_read)
+#define BINDER_SET_IDLE_TIMEOUT _IOW('b', 3, int64_t)
+#define BINDER_SET_MAX_THREADS _IOW('b', 5, size_t)
+#define BINDER_SET_IDLE_PRIORITY _IOW('b', 6, int)
+#define BINDER_SET_CONTEXT_MGR _IOW('b', 7, int)
+#define BINDER_THREAD_EXIT _IOW('b', 8, int)
+#define BINDER_VERSION _IOWR('b', 9, struct binder_version)
+
+/*
+ * NOTE: Two special error codes you should check for when calling
+ * in to the driver are:
+ *
+ * EINTR -- The operation has been interupted. This should be
+ * handled by retrying the ioctl() until a different error code
+ * is returned.
+ *
+ * ECONNREFUSED -- The driver is no longer accepting operations
+ * from your process. That is, the process is being destroyed.
+ * You should handle this by exiting from your process. Note
+ * that once this error code is returned, all further calls to
+ * the driver from any thread will return this same code.
+ */
+
+enum transaction_flags {
+ TF_ONE_WAY = 0x01, /* this is a one-way call: async, no return */
+ TF_ROOT_OBJECT = 0x04, /* contents are the component's root object */
+ TF_STATUS_CODE = 0x08, /* contents are a 32-bit status code */
+ TF_ACCEPT_FDS = 0x10, /* allow replies with file descriptors */
+};
+
+struct binder_transaction_data {
+ /* The first two are only used for bcTRANSACTION and brTRANSACTION,
+ * identifying the target and contents of the transaction.
+ */
+ union {
+ size_t handle; /* target descriptor of command transaction */
+ void *ptr; /* target descriptor of return transaction */
+ } target;
+ void *cookie; /* target object cookie */
+ unsigned int code; /* transaction command */
+
+ /* General information about the transaction. */
+ unsigned int flags;
+ pid_t sender_pid;
+ uid_t sender_euid;
+ size_t data_size; /* number of bytes of data */
+ size_t offsets_size; /* number of bytes of offsets */
+
+ /* If this transaction is inline, the data immediately
+ * follows here; otherwise, it ends with a pointer to
+ * the data buffer.
+ */
+ union {
+ struct {
+ /* transaction data */
+ const void *buffer;
+ /* offsets from buffer to flat_binder_object structs */
+ const void *offsets;
+ } ptr;
+ uint8_t buf[8];
+ } data;
+};
+
+struct binder_ptr_cookie {
+ void *ptr;
+ void *cookie;
+};
+
+struct binder_pri_desc {
+ int priority;
+ int desc;
+};
+
+struct binder_pri_ptr_cookie {
+ int priority;
+ void *ptr;
+ void *cookie;
+};
+
+enum BinderDriverReturnProtocol {
+ BR_ERROR = _IOR('r', 0, int),
+ /*
+ * int: error code
+ */
+
+ BR_OK = _IO('r', 1),
+ /* No parameters! */
+
+ BR_TRANSACTION = _IOR('r', 2, struct binder_transaction_data),
+ BR_REPLY = _IOR('r', 3, struct binder_transaction_data),
+ /*
+ * binder_transaction_data: the received command.
+ */
+
+ BR_ACQUIRE_RESULT = _IOR('r', 4, int),
+ /*
+ * not currently supported
+ * int: 0 if the last bcATTEMPT_ACQUIRE was not successful.
+ * Else the remote object has acquired a primary reference.
+ */
+
+ BR_DEAD_REPLY = _IO('r', 5),
+ /*
+ * The target of the last transaction (either a bcTRANSACTION or
+ * a bcATTEMPT_ACQUIRE) is no longer with us. No parameters.
+ */
+
+ BR_TRANSACTION_COMPLETE = _IO('r', 6),
+ /*
+ * No parameters... always refers to the last transaction requested
+ * (including replies). Note that this will be sent even for
+ * asynchronous transactions.
+ */
+
+ BR_INCREFS = _IOR('r', 7, struct binder_ptr_cookie),
+ BR_ACQUIRE = _IOR('r', 8, struct binder_ptr_cookie),
+ BR_RELEASE = _IOR('r', 9, struct binder_ptr_cookie),
+ BR_DECREFS = _IOR('r', 10, struct binder_ptr_cookie),
+ /*
+ * void *: ptr to binder
+ * void *: cookie for binder
+ */
+
+ BR_ATTEMPT_ACQUIRE = _IOR('r', 11, struct binder_pri_ptr_cookie),
+ /*
+ * not currently supported
+ * int: priority
+ * void *: ptr to binder
+ * void *: cookie for binder
+ */
+
+ BR_NOOP = _IO('r', 12),
+ /*
+ * No parameters. Do nothing and examine the next command. It exists
+ * primarily so that we can replace it with a BR_SPAWN_LOOPER command.
+ */
+
+ BR_SPAWN_LOOPER = _IO('r', 13),
+ /*
+ * No parameters. The driver has determined that a process has no
+ * threads waiting to service incomming transactions. When a process
+ * receives this command, it must spawn a new service thread and
+ * register it via bcENTER_LOOPER.
+ */
+
+ BR_FINISHED = _IO('r', 14),
+ /*
+ * not currently supported
+ * stop threadpool thread
+ */
+
+ BR_DEAD_BINDER = _IOR('r', 15, void *),
+ /*
+ * void *: cookie
+ */
+ BR_CLEAR_DEATH_NOTIFICATION_DONE = _IOR('r', 16, void *),
+ /*
+ * void *: cookie
+ */
+
+ BR_FAILED_REPLY = _IO('r', 17),
+ /*
+ * The the last transaction (either a bcTRANSACTION or
+ * a bcATTEMPT_ACQUIRE) failed (e.g. out of memory). No parameters.
+ */
+};
+
+enum BinderDriverCommandProtocol {
+ BC_TRANSACTION = _IOW('c', 0, struct binder_transaction_data),
+ BC_REPLY = _IOW('c', 1, struct binder_transaction_data),
+ /*
+ * binder_transaction_data: the sent command.
+ */
+
+ BC_ACQUIRE_RESULT = _IOW('c', 2, int),
+ /*
+ * not currently supported
+ * int: 0 if the last BR_ATTEMPT_ACQUIRE was not successful.
+ * Else you have acquired a primary reference on the object.
+ */
+
+ BC_FREE_BUFFER = _IOW('c', 3, int),
+ /*
+ * void *: ptr to transaction data received on a read
+ */
+
+ BC_INCREFS = _IOW('c', 4, int),
+ BC_ACQUIRE = _IOW('c', 5, int),
+ BC_RELEASE = _IOW('c', 6, int),
+ BC_DECREFS = _IOW('c', 7, int),
+ /*
+ * int: descriptor
+ */
+
+ BC_INCREFS_DONE = _IOW('c', 8, struct binder_ptr_cookie),
+ BC_ACQUIRE_DONE = _IOW('c', 9, struct binder_ptr_cookie),
+ /*
+ * void *: ptr to binder
+ * void *: cookie for binder
+ */
+
+ BC_ATTEMPT_ACQUIRE = _IOW('c', 10, struct binder_pri_desc),
+ /*
+ * not currently supported
+ * int: priority
+ * int: descriptor
+ */
+
+ BC_REGISTER_LOOPER = _IO('c', 11),
+ /*
+ * No parameters.
+ * Register a spawned looper thread with the device.
+ */
+
+ BC_ENTER_LOOPER = _IO('c', 12),
+ BC_EXIT_LOOPER = _IO('c', 13),
+ /*
+ * No parameters.
+ * These two commands are sent as an application-level thread
+ * enters and exits the binder loop, respectively. They are
+ * used so the binder can have an accurate count of the number
+ * of looping threads it has available.
+ */
+
+ BC_REQUEST_DEATH_NOTIFICATION = _IOW('c', 14, struct binder_ptr_cookie),
+ /*
+ * void *: ptr to binder
+ * void *: cookie
+ */
+
+ BC_CLEAR_DEATH_NOTIFICATION = _IOW('c', 15, struct binder_ptr_cookie),
+ /*
+ * void *: ptr to binder
+ * void *: cookie
+ */
+
+ BC_DEAD_BINDER_DONE = _IOW('c', 16, void *),
+ /*
+ * void *: cookie
+ */
+};
+
+#endif /* _LINUX_BINDER_H */
+
diff --git a/stblinux-2.6.37/drivers/staging/android/logger.c b/stblinux-2.6.37/drivers/staging/android/logger.c
new file mode 100644
index 0000000..7d8e7d8
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/logger.c
@@ -0,0 +1,609 @@
+/*
+ * drivers/misc/logger.c
+ *
+ * A Logging Subsystem
+ *
+ * Copyright (C) 2007-2008 Google, Inc.
+ *
+ * Robert Love <rlove@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/uaccess.h>
+#include <linux/poll.h>
+#include <linux/time.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include "logger.h"
+
+#include <asm/ioctls.h>
+
+/*
+ * struct logger_log - represents a specific log, such as 'main' or 'radio'
+ *
+ * This structure lives from module insertion until module removal, so it does
+ * not need additional reference counting. The structure is protected by the
+ * mutex 'mutex'.
+ */
+struct logger_log {
+ unsigned char *buffer;/* the ring buffer itself */
+ struct miscdevice misc; /* misc device representing the log */
+ wait_queue_head_t wq; /* wait queue for readers */
+ struct list_head readers; /* this log's readers */
+ struct mutex mutex; /* mutex protecting buffer */
+ size_t w_off; /* current write head offset */
+ size_t head; /* new readers start here */
+ size_t size; /* size of the log */
+};
+
+/*
+ * struct logger_reader - a logging device open for reading
+ *
+ * This object lives from open to release, so we don't need additional
+ * reference counting. The structure is protected by log->mutex.
+ */
+struct logger_reader {
+ struct logger_log *log; /* associated log */
+ struct list_head list; /* entry in logger_log's list */
+ size_t r_off; /* current read head offset */
+};
+
+/* logger_offset - returns index 'n' into the log via (optimized) modulus */
+#define logger_offset(n) ((n) & (log->size - 1))
+
+/*
+ * file_get_log - Given a file structure, return the associated log
+ *
+ * This isn't aesthetic. We have several goals:
+ *
+ * 1) Need to quickly obtain the associated log during an I/O operation
+ * 2) Readers need to maintain state (logger_reader)
+ * 3) Writers need to be very fast (open() should be a near no-op)
+ *
+ * In the reader case, we can trivially go file->logger_reader->logger_log.
+ * For a writer, we don't want to maintain a logger_reader, so we just go
+ * file->logger_log. Thus what file->private_data points at depends on whether
+ * or not the file was opened for reading. This function hides that dirtiness.
+ */
+static inline struct logger_log *file_get_log(struct file *file)
+{
+ if (file->f_mode & FMODE_READ) {
+ struct logger_reader *reader = file->private_data;
+ return reader->log;
+ } else
+ return file->private_data;
+}
+
+/*
+ * get_entry_len - Grabs the length of the payload of the next entry starting
+ * from 'off'.
+ *
+ * Caller needs to hold log->mutex.
+ */
+static __u32 get_entry_len(struct logger_log *log, size_t off)
+{
+ __u16 val;
+
+ switch (log->size - off) {
+ case 1:
+ memcpy(&val, log->buffer + off, 1);
+ memcpy(((char *) &val) + 1, log->buffer, 1);
+ break;
+ default:
+ memcpy(&val, log->buffer + off, 2);
+ }
+
+ return sizeof(struct logger_entry) + val;
+}
+
+/*
+ * do_read_log_to_user - reads exactly 'count' bytes from 'log' into the
+ * user-space buffer 'buf'. Returns 'count' on success.
+ *
+ * Caller must hold log->mutex.
+ */
+static ssize_t do_read_log_to_user(struct logger_log *log,
+ struct logger_reader *reader,
+ char __user *buf,
+ size_t count)
+{
+ size_t len;
+
+ /*
+ * We read from the log in two disjoint operations. First, we read from
+ * the current read head offset up to 'count' bytes or to the end of
+ * the log, whichever comes first.
+ */
+ len = min(count, log->size - reader->r_off);
+ if (copy_to_user(buf, log->buffer + reader->r_off, len))
+ return -EFAULT;
+
+ /*
+ * Second, we read any remaining bytes, starting back at the head of
+ * the log.
+ */
+ if (count != len)
+ if (copy_to_user(buf + len, log->buffer, count - len))
+ return -EFAULT;
+
+ reader->r_off = logger_offset(reader->r_off + count);
+
+ return count;
+}
+
+/*
+ * logger_read - our log's read() method
+ *
+ * Behavior:
+ *
+ * - O_NONBLOCK works
+ * - If there are no log entries to read, blocks until log is written to
+ * - Atomically reads exactly one log entry
+ *
+ * Optimal read size is LOGGER_ENTRY_MAX_LEN. Will set errno to EINVAL if read
+ * buffer is insufficient to hold next entry.
+ */
+static ssize_t logger_read(struct file *file, char __user *buf,
+ size_t count, loff_t *pos)
+{
+ struct logger_reader *reader = file->private_data;
+ struct logger_log *log = reader->log;
+ ssize_t ret;
+ DEFINE_WAIT(wait);
+
+start:
+ while (1) {
+ prepare_to_wait(&log->wq, &wait, TASK_INTERRUPTIBLE);
+
+ mutex_lock(&log->mutex);
+ ret = (log->w_off == reader->r_off);
+ mutex_unlock(&log->mutex);
+ if (!ret)
+ break;
+
+ if (file->f_flags & O_NONBLOCK) {
+ ret = -EAGAIN;
+ break;
+ }
+
+ if (signal_pending(current)) {
+ ret = -EINTR;
+ break;
+ }
+
+ schedule();
+ }
+
+ finish_wait(&log->wq, &wait);
+ if (ret)
+ return ret;
+
+ mutex_lock(&log->mutex);
+
+ /* is there still something to read or did we race? */
+ if (unlikely(log->w_off == reader->r_off)) {
+ mutex_unlock(&log->mutex);
+ goto start;
+ }
+
+ /* get the size of the next entry */
+ ret = get_entry_len(log, reader->r_off);
+ if (count < ret) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* get exactly one entry from the log */
+ ret = do_read_log_to_user(log, reader, buf, ret);
+
+out:
+ mutex_unlock(&log->mutex);
+
+ return ret;
+}
+
+/*
+ * get_next_entry - return the offset of the first valid entry at least 'len'
+ * bytes after 'off'.
+ *
+ * Caller must hold log->mutex.
+ */
+static size_t get_next_entry(struct logger_log *log, size_t off, size_t len)
+{
+ size_t count = 0;
+
+ do {
+ size_t nr = get_entry_len(log, off);
+ off = logger_offset(off + nr);
+ count += nr;
+ } while (count < len);
+
+ return off;
+}
+
+/*
+ * clock_interval - is a < c < b in mod-space? Put another way, does the line
+ * from a to b cross c?
+ */
+static inline int clock_interval(size_t a, size_t b, size_t c)
+{
+ if (b < a) {
+ if (a < c || b >= c)
+ return 1;
+ } else {
+ if (a < c && b >= c)
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * fix_up_readers - walk the list of all readers and "fix up" any who were
+ * lapped by the writer; also do the same for the default "start head".
+ * We do this by "pulling forward" the readers and start head to the first
+ * entry after the new write head.
+ *
+ * The caller needs to hold log->mutex.
+ */
+static void fix_up_readers(struct logger_log *log, size_t len)
+{
+ size_t old = log->w_off;
+ size_t new = logger_offset(old + len);
+ struct logger_reader *reader;
+
+ if (clock_interval(old, new, log->head))
+ log->head = get_next_entry(log, log->head, len);
+
+ list_for_each_entry(reader, &log->readers, list)
+ if (clock_interval(old, new, reader->r_off))
+ reader->r_off = get_next_entry(log, reader->r_off, len);
+}
+
+/*
+ * do_write_log - writes 'len' bytes from 'buf' to 'log'
+ *
+ * The caller needs to hold log->mutex.
+ */
+static void do_write_log(struct logger_log *log, const void *buf, size_t count)
+{
+ size_t len;
+
+ len = min(count, log->size - log->w_off);
+ memcpy(log->buffer + log->w_off, buf, len);
+
+ if (count != len)
+ memcpy(log->buffer, buf + len, count - len);
+
+ log->w_off = logger_offset(log->w_off + count);
+
+}
+
+/*
+ * do_write_log_user - writes 'len' bytes from the user-space buffer 'buf' to
+ * the log 'log'
+ *
+ * The caller needs to hold log->mutex.
+ *
+ * Returns 'count' on success, negative error code on failure.
+ */
+static ssize_t do_write_log_from_user(struct logger_log *log,
+ const void __user *buf, size_t count)
+{
+ size_t len;
+
+ len = min(count, log->size - log->w_off);
+ if (len && copy_from_user(log->buffer + log->w_off, buf, len))
+ return -EFAULT;
+
+ if (count != len)
+ if (copy_from_user(log->buffer, buf + len, count - len))
+ return -EFAULT;
+
+ log->w_off = logger_offset(log->w_off + count);
+
+ return count;
+}
+
+/*
+ * logger_aio_write - our write method, implementing support for write(),
+ * writev(), and aio_write(). Writes are our fast path, and we try to optimize
+ * them above all else.
+ */
+ssize_t logger_aio_write(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t ppos)
+{
+ struct logger_log *log = file_get_log(iocb->ki_filp);
+ size_t orig = log->w_off;
+ struct logger_entry header;
+ struct timespec now;
+ ssize_t ret = 0;
+
+ now = current_kernel_time();
+
+ header.pid = current->tgid;
+ header.tid = current->pid;
+ header.sec = now.tv_sec;
+ header.nsec = now.tv_nsec;
+ header.len = min_t(size_t, iocb->ki_left, LOGGER_ENTRY_MAX_PAYLOAD);
+
+ /* null writes succeed, return zero */
+ if (unlikely(!header.len))
+ return 0;
+
+ mutex_lock(&log->mutex);
+
+ /*
+ * Fix up any readers, pulling them forward to the first readable
+ * entry after (what will be) the new write offset. We do this now
+ * because if we partially fail, we can end up with clobbered log
+ * entries that encroach on readable buffer.
+ */
+ fix_up_readers(log, sizeof(struct logger_entry) + header.len);
+
+ do_write_log(log, &header, sizeof(struct logger_entry));
+
+ while (nr_segs-- > 0) {
+ size_t len;
+ ssize_t nr;
+
+ /* figure out how much of this vector we can keep */
+ len = min_t(size_t, iov->iov_len, header.len - ret);
+
+ /* write out this segment's payload */
+ nr = do_write_log_from_user(log, iov->iov_base, len);
+ if (unlikely(nr < 0)) {
+ log->w_off = orig;
+ mutex_unlock(&log->mutex);
+ return nr;
+ }
+
+ iov++;
+ ret += nr;
+ }
+
+ mutex_unlock(&log->mutex);
+
+ /* wake up any blocked readers */
+ wake_up_interruptible(&log->wq);
+
+ return ret;
+}
+
+static struct logger_log *get_log_from_minor(int);
+
+/*
+ * logger_open - the log's open() file operation
+ *
+ * Note how near a no-op this is in the write-only case. Keep it that way!
+ */
+static int logger_open(struct inode *inode, struct file *file)
+{
+ struct logger_log *log;
+ int ret;
+
+ ret = nonseekable_open(inode, file);
+ if (ret)
+ return ret;
+
+ log = get_log_from_minor(MINOR(inode->i_rdev));
+ if (!log)
+ return -ENODEV;
+
+ if (file->f_mode & FMODE_READ) {
+ struct logger_reader *reader;
+
+ reader = kmalloc(sizeof(struct logger_reader), GFP_KERNEL);
+ if (!reader)
+ return -ENOMEM;
+
+ reader->log = log;
+ INIT_LIST_HEAD(&reader->list);
+
+ mutex_lock(&log->mutex);
+ reader->r_off = log->head;
+ list_add_tail(&reader->list, &log->readers);
+ mutex_unlock(&log->mutex);
+
+ file->private_data = reader;
+ } else
+ file->private_data = log;
+
+ return 0;
+}
+
+/*
+ * logger_release - the log's release file operation
+ *
+ * Note this is a total no-op in the write-only case. Keep it that way!
+ */
+static int logger_release(struct inode *ignored, struct file *file)
+{
+ if (file->f_mode & FMODE_READ) {
+ struct logger_reader *reader = file->private_data;
+ list_del(&reader->list);
+ kfree(reader);
+ }
+
+ return 0;
+}
+
+/*
+ * logger_poll - the log's poll file operation, for poll/select/epoll
+ *
+ * Note we always return POLLOUT, because you can always write() to the log.
+ * Note also that, strictly speaking, a return value of POLLIN does not
+ * guarantee that the log is readable without blocking, as there is a small
+ * chance that the writer can lap the reader in the interim between poll()
+ * returning and the read() request.
+ */
+static unsigned int logger_poll(struct file *file, poll_table *wait)
+{
+ struct logger_reader *reader;
+ struct logger_log *log;
+ unsigned int ret = POLLOUT | POLLWRNORM;
+
+ if (!(file->f_mode & FMODE_READ))
+ return ret;
+
+ reader = file->private_data;
+ log = reader->log;
+
+ poll_wait(file, &log->wq, wait);
+
+ mutex_lock(&log->mutex);
+ if (log->w_off != reader->r_off)
+ ret |= POLLIN | POLLRDNORM;
+ mutex_unlock(&log->mutex);
+
+ return ret;
+}
+
+static long logger_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct logger_log *log = file_get_log(file);
+ struct logger_reader *reader;
+ long ret = -ENOTTY;
+
+ mutex_lock(&log->mutex);
+
+ switch (cmd) {
+ case LOGGER_GET_LOG_BUF_SIZE:
+ ret = log->size;
+ break;
+ case LOGGER_GET_LOG_LEN:
+ if (!(file->f_mode & FMODE_READ)) {
+ ret = -EBADF;
+ break;
+ }
+ reader = file->private_data;
+ if (log->w_off >= reader->r_off)
+ ret = log->w_off - reader->r_off;
+ else
+ ret = (log->size - reader->r_off) + log->w_off;
+ break;
+ case LOGGER_GET_NEXT_ENTRY_LEN:
+ if (!(file->f_mode & FMODE_READ)) {
+ ret = -EBADF;
+ break;
+ }
+ reader = file->private_data;
+ if (log->w_off != reader->r_off)
+ ret = get_entry_len(log, reader->r_off);
+ else
+ ret = 0;
+ break;
+ case LOGGER_FLUSH_LOG:
+ if (!(file->f_mode & FMODE_WRITE)) {
+ ret = -EBADF;
+ break;
+ }
+ list_for_each_entry(reader, &log->readers, list)
+ reader->r_off = log->w_off;
+ log->head = log->w_off;
+ ret = 0;
+ break;
+ }
+
+ mutex_unlock(&log->mutex);
+
+ return ret;
+}
+
+static const struct file_operations logger_fops = {
+ .owner = THIS_MODULE,
+ .read = logger_read,
+ .aio_write = logger_aio_write,
+ .poll = logger_poll,
+ .unlocked_ioctl = logger_ioctl,
+ .compat_ioctl = logger_ioctl,
+ .open = logger_open,
+ .release = logger_release,
+};
+
+/*
+ * Defines a log structure with name 'NAME' and a size of 'SIZE' bytes, which
+ * must be a power of two, greater than LOGGER_ENTRY_MAX_LEN, and less than
+ * LONG_MAX minus LOGGER_ENTRY_MAX_LEN.
+ */
+#define DEFINE_LOGGER_DEVICE(VAR, NAME, SIZE) \
+static unsigned char _buf_ ## VAR[SIZE]; \
+static struct logger_log VAR = { \
+ .buffer = _buf_ ## VAR, \
+ .misc = { \
+ .minor = MISC_DYNAMIC_MINOR, \
+ .name = NAME, \
+ .fops = &logger_fops, \
+ .parent = NULL, \
+ }, \
+ .wq = __WAIT_QUEUE_HEAD_INITIALIZER(VAR .wq), \
+ .readers = LIST_HEAD_INIT(VAR .readers), \
+ .mutex = __MUTEX_INITIALIZER(VAR .mutex), \
+ .w_off = 0, \
+ .head = 0, \
+ .size = SIZE, \
+};
+
+DEFINE_LOGGER_DEVICE(log_main, LOGGER_LOG_MAIN, 64*1024)
+DEFINE_LOGGER_DEVICE(log_events, LOGGER_LOG_EVENTS, 256*1024)
+DEFINE_LOGGER_DEVICE(log_radio, LOGGER_LOG_RADIO, 64*1024)
+
+static struct logger_log *get_log_from_minor(int minor)
+{
+ if (log_main.misc.minor == minor)
+ return &log_main;
+ if (log_events.misc.minor == minor)
+ return &log_events;
+ if (log_radio.misc.minor == minor)
+ return &log_radio;
+ return NULL;
+}
+
+static int __init init_log(struct logger_log *log)
+{
+ int ret;
+
+ ret = misc_register(&log->misc);
+ if (unlikely(ret)) {
+ printk(KERN_ERR "logger: failed to register misc "
+ "device for log '%s'!\n", log->misc.name);
+ return ret;
+ }
+
+ printk(KERN_INFO "logger: created %luK log '%s'\n",
+ (unsigned long) log->size >> 10, log->misc.name);
+
+ return 0;
+}
+
+static int __init logger_init(void)
+{
+ int ret;
+
+ ret = init_log(&log_main);
+ if (unlikely(ret))
+ goto out;
+
+ ret = init_log(&log_events);
+ if (unlikely(ret))
+ goto out;
+
+ ret = init_log(&log_radio);
+ if (unlikely(ret))
+ goto out;
+
+out:
+ return ret;
+}
+device_initcall(logger_init);
diff --git a/stblinux-2.6.37/drivers/staging/android/logger.h b/stblinux-2.6.37/drivers/staging/android/logger.h
new file mode 100644
index 0000000..a562434
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/logger.h
@@ -0,0 +1,48 @@
+/* include/linux/logger.h
+ *
+ * Copyright (C) 2007-2008 Google, Inc.
+ * Author: Robert Love <rlove@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _LINUX_LOGGER_H
+#define _LINUX_LOGGER_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+struct logger_entry {
+ __u16 len; /* length of the payload */
+ __u16 __pad; /* no matter what, we get 2 bytes of padding */
+ __s32 pid; /* generating process's pid */
+ __s32 tid; /* generating process's tid */
+ __s32 sec; /* seconds since Epoch */
+ __s32 nsec; /* nanoseconds */
+ char msg[0]; /* the entry's payload */
+};
+
+#define LOGGER_LOG_RADIO "log_radio" /* radio-related messages */
+#define LOGGER_LOG_EVENTS "log_events" /* system/hardware events */
+#define LOGGER_LOG_MAIN "log_main" /* everything else */
+
+#define LOGGER_ENTRY_MAX_LEN (4*1024)
+#define LOGGER_ENTRY_MAX_PAYLOAD \
+ (LOGGER_ENTRY_MAX_LEN - sizeof(struct logger_entry))
+
+#define __LOGGERIO 0xAE
+
+#define LOGGER_GET_LOG_BUF_SIZE _IO(__LOGGERIO, 1) /* size of log */
+#define LOGGER_GET_LOG_LEN _IO(__LOGGERIO, 2) /* used log len */
+#define LOGGER_GET_NEXT_ENTRY_LEN _IO(__LOGGERIO, 3) /* next entry len */
+#define LOGGER_FLUSH_LOG _IO(__LOGGERIO, 4) /* flush log */
+
+#endif /* _LINUX_LOGGER_H */
diff --git a/stblinux-2.6.37/drivers/staging/android/lowmemorykiller.c b/stblinux-2.6.37/drivers/staging/android/lowmemorykiller.c
new file mode 100644
index 0000000..f934393
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/lowmemorykiller.c
@@ -0,0 +1,158 @@
+/* drivers/misc/lowmemorykiller.c
+ *
+ * Copyright (C) 2007-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/oom.h>
+#include <linux/sched.h>
+
+static int lowmem_shrink(int nr_to_scan, gfp_t gfp_mask);
+
+static struct shrinker lowmem_shrinker = {
+ .shrink = lowmem_shrink,
+ .seeks = DEFAULT_SEEKS * 16
+};
+static uint32_t lowmem_debug_level = 2;
+static int lowmem_adj[6] = {
+ 0,
+ 1,
+ 6,
+ 12,
+};
+static int lowmem_adj_size = 4;
+static size_t lowmem_minfree[6] = {
+ 3 * 512, /* 6MB */
+ 2 * 1024, /* 8MB */
+ 4 * 1024, /* 16MB */
+ 16 * 1024, /* 64MB */
+};
+static int lowmem_minfree_size = 4;
+
+#define lowmem_print(level, x...) \
+ do { \
+ if (lowmem_debug_level >= (level)) \
+ printk(x); \
+ } while (0)
+
+module_param_named(cost, lowmem_shrinker.seeks, int, S_IRUGO | S_IWUSR);
+module_param_array_named(adj, lowmem_adj, int, &lowmem_adj_size,
+ S_IRUGO | S_IWUSR);
+module_param_array_named(minfree, lowmem_minfree, uint, &lowmem_minfree_size,
+ S_IRUGO | S_IWUSR);
+module_param_named(debug_level, lowmem_debug_level, uint, S_IRUGO | S_IWUSR);
+
+static int lowmem_shrink(int nr_to_scan, gfp_t gfp_mask)
+{
+ struct task_struct *p;
+ struct task_struct *selected = NULL;
+ int rem = 0;
+ int tasksize;
+ int i;
+ int min_adj = OOM_ADJUST_MAX + 1;
+ int selected_tasksize = 0;
+ int selected_oom_adj;
+ int array_size = ARRAY_SIZE(lowmem_adj);
+ int other_free = global_page_state(NR_FREE_PAGES);
+ int other_file = global_page_state(NR_FILE_PAGES);
+
+ if (lowmem_adj_size < array_size)
+ array_size = lowmem_adj_size;
+ if (lowmem_minfree_size < array_size)
+ array_size = lowmem_minfree_size;
+ for (i = 0; i < array_size; i++) {
+ if (other_free < lowmem_minfree[i] &&
+ other_file < lowmem_minfree[i]) {
+ min_adj = lowmem_adj[i];
+ break;
+ }
+ }
+ if (nr_to_scan > 0)
+ lowmem_print(3, "lowmem_shrink %d, %x, ofree %d %d, ma %d\n",
+ nr_to_scan, gfp_mask, other_free, other_file,
+ min_adj);
+ rem = global_page_state(NR_ACTIVE_ANON) +
+ global_page_state(NR_ACTIVE_FILE) +
+ global_page_state(NR_INACTIVE_ANON) +
+ global_page_state(NR_INACTIVE_FILE);
+ if (nr_to_scan <= 0 || min_adj == OOM_ADJUST_MAX + 1) {
+ lowmem_print(5, "lowmem_shrink %d, %x, return %d\n",
+ nr_to_scan, gfp_mask, rem);
+ return rem;
+ }
+ selected_oom_adj = min_adj;
+
+ read_lock(&tasklist_lock);
+ for_each_process(p) {
+ struct mm_struct *mm;
+ int oom_adj;
+
+ task_lock(p);
+ mm = p->mm;
+ if (!mm) {
+ task_unlock(p);
+ continue;
+ }
+ oom_adj = mm->oom_adj;
+ if (oom_adj < min_adj) {
+ task_unlock(p);
+ continue;
+ }
+ tasksize = get_mm_rss(mm);
+ task_unlock(p);
+ if (tasksize <= 0)
+ continue;
+ if (selected) {
+ if (oom_adj < selected_oom_adj)
+ continue;
+ if (oom_adj == selected_oom_adj &&
+ tasksize <= selected_tasksize)
+ continue;
+ }
+ selected = p;
+ selected_tasksize = tasksize;
+ selected_oom_adj = oom_adj;
+ lowmem_print(2, "select %d (%s), adj %d, size %d, to kill\n",
+ p->pid, p->comm, oom_adj, tasksize);
+ }
+ if (selected) {
+ lowmem_print(1, "send sigkill to %d (%s), adj %d, size %d\n",
+ selected->pid, selected->comm,
+ selected_oom_adj, selected_tasksize);
+ force_sig(SIGKILL, selected);
+ rem -= selected_tasksize;
+ }
+ lowmem_print(4, "lowmem_shrink %d, %x, return %d\n",
+ nr_to_scan, gfp_mask, rem);
+ read_unlock(&tasklist_lock);
+ return rem;
+}
+
+static int __init lowmem_init(void)
+{
+ register_shrinker(&lowmem_shrinker);
+ return 0;
+}
+
+static void __exit lowmem_exit(void)
+{
+ unregister_shrinker(&lowmem_shrinker);
+}
+
+module_init(lowmem_init);
+module_exit(lowmem_exit);
+
+MODULE_LICENSE("GPL");
+
diff --git a/stblinux-2.6.37/drivers/staging/android/lowmemorykiller.txt b/stblinux-2.6.37/drivers/staging/android/lowmemorykiller.txt
new file mode 100644
index 0000000..bd5c0c0
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/lowmemorykiller.txt
@@ -0,0 +1,16 @@
+The lowmemorykiller driver lets user-space specify a set of memory thresholds
+where processes with a range of oom_adj values will get killed. Specify the
+minimum oom_adj values in /sys/module/lowmemorykiller/parameters/adj and the
+number of free pages in /sys/module/lowmemorykiller/parameters/minfree. Both
+files take a comma separated list of numbers in ascending order.
+
+For example, write "0,8" to /sys/module/lowmemorykiller/parameters/adj and
+"1024,4096" to /sys/module/lowmemorykiller/parameters/minfree to kill processes
+with a oom_adj value of 8 or higher when the free memory drops below 4096 pages
+and kill processes with a oom_adj value of 0 or higher when the free memory
+drops below 1024 pages.
+
+The driver considers memory used for caches to be free, but if a large
+percentage of the cached memory is locked this can be very inaccurate
+and processes may not get killed until the normal oom killer is triggered.
+
diff --git a/stblinux-2.6.37/drivers/staging/android/ram_console.c b/stblinux-2.6.37/drivers/staging/android/ram_console.c
new file mode 100644
index 0000000..8f18a59
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/ram_console.c
@@ -0,0 +1,410 @@
+/* drivers/android/ram_console.c
+ *
+ * Copyright (C) 2007-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/proc_fs.h>
+#include <linux/string.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+#include <linux/rslib.h>
+#endif
+
+struct ram_console_buffer {
+ uint32_t sig;
+ uint32_t start;
+ uint32_t size;
+ uint8_t data[0];
+};
+
+#define RAM_CONSOLE_SIG (0x43474244) /* DBGC */
+
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_EARLY_INIT
+static char __initdata
+ ram_console_old_log_init_buffer[CONFIG_ANDROID_RAM_CONSOLE_EARLY_SIZE];
+#endif
+static char *ram_console_old_log;
+static size_t ram_console_old_log_size;
+
+static struct ram_console_buffer *ram_console_buffer;
+static size_t ram_console_buffer_size;
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+static char *ram_console_par_buffer;
+static struct rs_control *ram_console_rs_decoder;
+static int ram_console_corrected_bytes;
+static int ram_console_bad_blocks;
+#define ECC_BLOCK_SIZE CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION_DATA_SIZE
+#define ECC_SIZE CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION_ECC_SIZE
+#define ECC_SYMSIZE CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION_SYMBOL_SIZE
+#define ECC_POLY CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION_POLYNOMIAL
+#endif
+
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+static void ram_console_encode_rs8(uint8_t *data, size_t len, uint8_t *ecc)
+{
+ int i;
+ uint16_t par[ECC_SIZE];
+ /* Initialize the parity buffer */
+ memset(par, 0, sizeof(par));
+ encode_rs8(ram_console_rs_decoder, data, len, par, 0);
+ for (i = 0; i < ECC_SIZE; i++)
+ ecc[i] = par[i];
+}
+
+static int ram_console_decode_rs8(void *data, size_t len, uint8_t *ecc)
+{
+ int i;
+ uint16_t par[ECC_SIZE];
+ for (i = 0; i < ECC_SIZE; i++)
+ par[i] = ecc[i];
+ return decode_rs8(ram_console_rs_decoder, data, par, len,
+ NULL, 0, NULL, 0, NULL);
+}
+#endif
+
+static void ram_console_update(const char *s, unsigned int count)
+{
+ struct ram_console_buffer *buffer = ram_console_buffer;
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+ uint8_t *buffer_end = buffer->data + ram_console_buffer_size;
+ uint8_t *block;
+ uint8_t *par;
+ int size = ECC_BLOCK_SIZE;
+#endif
+ memcpy(buffer->data + buffer->start, s, count);
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+ block = buffer->data + (buffer->start & ~(ECC_BLOCK_SIZE - 1));
+ par = ram_console_par_buffer +
+ (buffer->start / ECC_BLOCK_SIZE) * ECC_SIZE;
+ do {
+ if (block + ECC_BLOCK_SIZE > buffer_end)
+ size = buffer_end - block;
+ ram_console_encode_rs8(block, size, par);
+ block += ECC_BLOCK_SIZE;
+ par += ECC_SIZE;
+ } while (block < buffer->data + buffer->start + count);
+#endif
+}
+
+static void ram_console_update_header(void)
+{
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+ struct ram_console_buffer *buffer = ram_console_buffer;
+ uint8_t *par;
+ par = ram_console_par_buffer +
+ DIV_ROUND_UP(ram_console_buffer_size, ECC_BLOCK_SIZE) * ECC_SIZE;
+ ram_console_encode_rs8((uint8_t *)buffer, sizeof(*buffer), par);
+#endif
+}
+
+static void
+ram_console_write(struct console *console, const char *s, unsigned int count)
+{
+ int rem;
+ struct ram_console_buffer *buffer = ram_console_buffer;
+
+ if (count > ram_console_buffer_size) {
+ s += count - ram_console_buffer_size;
+ count = ram_console_buffer_size;
+ }
+ rem = ram_console_buffer_size - buffer->start;
+ if (rem < count) {
+ ram_console_update(s, rem);
+ s += rem;
+ count -= rem;
+ buffer->start = 0;
+ buffer->size = ram_console_buffer_size;
+ }
+ ram_console_update(s, count);
+
+ buffer->start += count;
+ if (buffer->size < ram_console_buffer_size)
+ buffer->size += count;
+ ram_console_update_header();
+}
+
+static struct console ram_console = {
+ .name = "ram",
+ .write = ram_console_write,
+ .flags = CON_PRINTBUFFER | CON_ENABLED,
+ .index = -1,
+};
+
+static void __init
+ram_console_save_old(struct ram_console_buffer *buffer, char *dest)
+{
+ size_t old_log_size = buffer->size;
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+ uint8_t *block;
+ uint8_t *par;
+ char strbuf[80];
+ int strbuf_len;
+
+ block = buffer->data;
+ par = ram_console_par_buffer;
+ while (block < buffer->data + buffer->size) {
+ int numerr;
+ int size = ECC_BLOCK_SIZE;
+ if (block + size > buffer->data + ram_console_buffer_size)
+ size = buffer->data + ram_console_buffer_size - block;
+ numerr = ram_console_decode_rs8(block, size, par);
+ if (numerr > 0) {
+#if 0
+ printk(KERN_INFO "ram_console: error in block %p, %d\n",
+ block, numerr);
+#endif
+ ram_console_corrected_bytes += numerr;
+ } else if (numerr < 0) {
+#if 0
+ printk(KERN_INFO "ram_console: uncorrectable error in "
+ "block %p\n", block);
+#endif
+ ram_console_bad_blocks++;
+ }
+ block += ECC_BLOCK_SIZE;
+ par += ECC_SIZE;
+ }
+ if (ram_console_corrected_bytes || ram_console_bad_blocks)
+ strbuf_len = snprintf(strbuf, sizeof(strbuf),
+ "\n%d Corrected bytes, %d unrecoverable blocks\n",
+ ram_console_corrected_bytes, ram_console_bad_blocks);
+ else
+ strbuf_len = snprintf(strbuf, sizeof(strbuf),
+ "\nNo errors detected\n");
+ if (strbuf_len >= sizeof(strbuf))
+ strbuf_len = sizeof(strbuf) - 1;
+ old_log_size += strbuf_len;
+#endif
+
+ if (dest == NULL) {
+ dest = kmalloc(old_log_size, GFP_KERNEL);
+ if (dest == NULL) {
+ printk(KERN_ERR
+ "ram_console: failed to allocate buffer\n");
+ return;
+ }
+ }
+
+ ram_console_old_log = dest;
+ ram_console_old_log_size = old_log_size;
+ memcpy(ram_console_old_log,
+ &buffer->data[buffer->start], buffer->size - buffer->start);
+ memcpy(ram_console_old_log + buffer->size - buffer->start,
+ &buffer->data[0], buffer->start);
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+ memcpy(ram_console_old_log + old_log_size - strbuf_len,
+ strbuf, strbuf_len);
+#endif
+}
+
+static int __init ram_console_init(struct ram_console_buffer *buffer,
+ size_t buffer_size, char *old_buf)
+{
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+ int numerr;
+ uint8_t *par;
+#endif
+ ram_console_buffer = buffer;
+ ram_console_buffer_size =
+ buffer_size - sizeof(struct ram_console_buffer);
+
+ if (ram_console_buffer_size > buffer_size) {
+ pr_err("ram_console: buffer %p, invalid size %zu, "
+ "datasize %zu\n", buffer, buffer_size,
+ ram_console_buffer_size);
+ return 0;
+ }
+
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
+ ram_console_buffer_size -= (DIV_ROUND_UP(ram_console_buffer_size,
+ ECC_BLOCK_SIZE) + 1) * ECC_SIZE;
+
+ if (ram_console_buffer_size > buffer_size) {
+ pr_err("ram_console: buffer %p, invalid size %zu, "
+ "non-ecc datasize %zu\n",
+ buffer, buffer_size, ram_console_buffer_size);
+ return 0;
+ }
+
+ ram_console_par_buffer = buffer->data + ram_console_buffer_size;
+
+
+ /* first consecutive root is 0
+ * primitive element to generate roots = 1
+ */
+ ram_console_rs_decoder = init_rs(ECC_SYMSIZE, ECC_POLY, 0, 1, ECC_SIZE);
+ if (ram_console_rs_decoder == NULL) {
+ printk(KERN_INFO "ram_console: init_rs failed\n");
+ return 0;
+ }
+
+ ram_console_corrected_bytes = 0;
+ ram_console_bad_blocks = 0;
+
+ par = ram_console_par_buffer +
+ DIV_ROUND_UP(ram_console_buffer_size, ECC_BLOCK_SIZE) * ECC_SIZE;
+
+ numerr = ram_console_decode_rs8(buffer, sizeof(*buffer), par);
+ if (numerr > 0) {
+ printk(KERN_INFO "ram_console: error in header, %d\n", numerr);
+ ram_console_corrected_bytes += numerr;
+ } else if (numerr < 0) {
+ printk(KERN_INFO
+ "ram_console: uncorrectable error in header\n");
+ ram_console_bad_blocks++;
+ }
+#endif
+
+ if (buffer->sig == RAM_CONSOLE_SIG) {
+ if (buffer->size > ram_console_buffer_size
+ || buffer->start > buffer->size)
+ printk(KERN_INFO "ram_console: found existing invalid "
+ "buffer, size %d, start %d\n",
+ buffer->size, buffer->start);
+ else {
+ printk(KERN_INFO "ram_console: found existing buffer, "
+ "size %d, start %d\n",
+ buffer->size, buffer->start);
+ ram_console_save_old(buffer, old_buf);
+ }
+ } else {
+ printk(KERN_INFO "ram_console: no valid data in buffer "
+ "(sig = 0x%08x)\n", buffer->sig);
+ }
+
+ buffer->sig = RAM_CONSOLE_SIG;
+ buffer->start = 0;
+ buffer->size = 0;
+
+ register_console(&ram_console);
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_ENABLE_VERBOSE
+ console_verbose();
+#endif
+ return 0;
+}
+
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_EARLY_INIT
+static int __init ram_console_early_init(void)
+{
+ return ram_console_init((struct ram_console_buffer *)
+ CONFIG_ANDROID_RAM_CONSOLE_EARLY_ADDR,
+ CONFIG_ANDROID_RAM_CONSOLE_EARLY_SIZE,
+ ram_console_old_log_init_buffer);
+}
+#else
+static int ram_console_driver_probe(struct platform_device *pdev)
+{
+ struct resource *res = pdev->resource;
+ size_t start;
+ size_t buffer_size;
+ void *buffer;
+
+ if (res == NULL || pdev->num_resources != 1 ||
+ !(res->flags & IORESOURCE_MEM)) {
+ printk(KERN_ERR "ram_console: invalid resource, %p %d flags "
+ "%lx\n", res, pdev->num_resources, res ? res->flags : 0);
+ return -ENXIO;
+ }
+ buffer_size = res->end - res->start + 1;
+ start = res->start;
+ printk(KERN_INFO "ram_console: got buffer at %zx, size %zx\n",
+ start, buffer_size);
+ buffer = ioremap(res->start, buffer_size);
+ if (buffer == NULL) {
+ printk(KERN_ERR "ram_console: failed to map memory\n");
+ return -ENOMEM;
+ }
+
+ return ram_console_init(buffer, buffer_size, NULL/* allocate */);
+}
+
+static struct platform_driver ram_console_driver = {
+ .probe = ram_console_driver_probe,
+ .driver = {
+ .name = "ram_console",
+ },
+};
+
+static int __init ram_console_module_init(void)
+{
+ int err;
+ err = platform_driver_register(&ram_console_driver);
+ return err;
+}
+#endif
+
+static ssize_t ram_console_read_old(struct file *file, char __user *buf,
+ size_t len, loff_t *offset)
+{
+ loff_t pos = *offset;
+ ssize_t count;
+
+ if (pos >= ram_console_old_log_size)
+ return 0;
+
+ count = min(len, (size_t)(ram_console_old_log_size - pos));
+ if (copy_to_user(buf, ram_console_old_log + pos, count))
+ return -EFAULT;
+
+ *offset += count;
+ return count;
+}
+
+static const struct file_operations ram_console_file_ops = {
+ .owner = THIS_MODULE,
+ .read = ram_console_read_old,
+};
+
+static int __init ram_console_late_init(void)
+{
+ struct proc_dir_entry *entry;
+
+ if (ram_console_old_log == NULL)
+ return 0;
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_EARLY_INIT
+ ram_console_old_log = kmalloc(ram_console_old_log_size, GFP_KERNEL);
+ if (ram_console_old_log == NULL) {
+ printk(KERN_ERR
+ "ram_console: failed to allocate buffer for old log\n");
+ ram_console_old_log_size = 0;
+ return 0;
+ }
+ memcpy(ram_console_old_log,
+ ram_console_old_log_init_buffer, ram_console_old_log_size);
+#endif
+ entry = create_proc_entry("last_kmsg", S_IFREG | S_IRUGO, NULL);
+ if (!entry) {
+ printk(KERN_ERR "ram_console: failed to create proc entry\n");
+ kfree(ram_console_old_log);
+ ram_console_old_log = NULL;
+ return 0;
+ }
+
+ entry->proc_fops = &ram_console_file_ops;
+ entry->size = ram_console_old_log_size;
+ return 0;
+}
+
+#ifdef CONFIG_ANDROID_RAM_CONSOLE_EARLY_INIT
+console_initcall(ram_console_early_init);
+#else
+module_init(ram_console_module_init);
+#endif
+late_initcall(ram_console_late_init);
+
diff --git a/stblinux-2.6.37/drivers/staging/android/timed_gpio.c b/stblinux-2.6.37/drivers/staging/android/timed_gpio.c
new file mode 100644
index 0000000..be7cdaa
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/timed_gpio.c
@@ -0,0 +1,166 @@
+/* drivers/misc/timed_gpio.c
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/hrtimer.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+
+#include "timed_output.h"
+#include "timed_gpio.h"
+
+
+struct timed_gpio_data {
+ struct timed_output_dev dev;
+ struct hrtimer timer;
+ spinlock_t lock;
+ unsigned gpio;
+ int max_timeout;
+ u8 active_low;
+};
+
+static enum hrtimer_restart gpio_timer_func(struct hrtimer *timer)
+{
+ struct timed_gpio_data *data =
+ container_of(timer, struct timed_gpio_data, timer);
+
+ gpio_direction_output(data->gpio, data->active_low ? 1 : 0);
+ return HRTIMER_NORESTART;
+}
+
+static int gpio_get_time(struct timed_output_dev *dev)
+{
+ struct timed_gpio_data *data =
+ container_of(dev, struct timed_gpio_data, dev);
+
+ if (hrtimer_active(&data->timer)) {
+ ktime_t r = hrtimer_get_remaining(&data->timer);
+ struct timeval t = ktime_to_timeval(r);
+ return t.tv_sec * 1000 + t.tv_usec / 1000;
+ } else
+ return 0;
+}
+
+static void gpio_enable(struct timed_output_dev *dev, int value)
+{
+ struct timed_gpio_data *data =
+ container_of(dev, struct timed_gpio_data, dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&data->lock, flags);
+
+ /* cancel previous timer and set GPIO according to value */
+ hrtimer_cancel(&data->timer);
+ gpio_direction_output(data->gpio, data->active_low ? !value : !!value);
+
+ if (value > 0) {
+ if (value > data->max_timeout)
+ value = data->max_timeout;
+
+ hrtimer_start(&data->timer,
+ ktime_set(value / 1000, (value % 1000) * 1000000),
+ HRTIMER_MODE_REL);
+ }
+
+ spin_unlock_irqrestore(&data->lock, flags);
+}
+
+static int timed_gpio_probe(struct platform_device *pdev)
+{
+ struct timed_gpio_platform_data *pdata = pdev->dev.platform_data;
+ struct timed_gpio *cur_gpio;
+ struct timed_gpio_data *gpio_data, *gpio_dat;
+ int i, j, ret = 0;
+
+ if (!pdata)
+ return -EBUSY;
+
+ gpio_data = kzalloc(sizeof(struct timed_gpio_data) * pdata->num_gpios,
+ GFP_KERNEL);
+ if (!gpio_data)
+ return -ENOMEM;
+
+ for (i = 0; i < pdata->num_gpios; i++) {
+ cur_gpio = &pdata->gpios[i];
+ gpio_dat = &gpio_data[i];
+
+ hrtimer_init(&gpio_dat->timer, CLOCK_MONOTONIC,
+ HRTIMER_MODE_REL);
+ gpio_dat->timer.function = gpio_timer_func;
+ spin_lock_init(&gpio_dat->lock);
+
+ gpio_dat->dev.name = cur_gpio->name;
+ gpio_dat->dev.get_time = gpio_get_time;
+ gpio_dat->dev.enable = gpio_enable;
+ ret = timed_output_dev_register(&gpio_dat->dev);
+ if (ret < 0) {
+ for (j = 0; j < i; j++)
+ timed_output_dev_unregister(&gpio_data[i].dev);
+ kfree(gpio_data);
+ return ret;
+ }
+
+ gpio_dat->gpio = cur_gpio->gpio;
+ gpio_dat->max_timeout = cur_gpio->max_timeout;
+ gpio_dat->active_low = cur_gpio->active_low;
+ gpio_direction_output(gpio_dat->gpio, gpio_dat->active_low);
+ }
+
+ platform_set_drvdata(pdev, gpio_data);
+
+ return 0;
+}
+
+static int timed_gpio_remove(struct platform_device *pdev)
+{
+ struct timed_gpio_platform_data *pdata = pdev->dev.platform_data;
+ struct timed_gpio_data *gpio_data = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < pdata->num_gpios; i++)
+ timed_output_dev_unregister(&gpio_data[i].dev);
+
+ kfree(gpio_data);
+
+ return 0;
+}
+
+static struct platform_driver timed_gpio_driver = {
+ .probe = timed_gpio_probe,
+ .remove = timed_gpio_remove,
+ .driver = {
+ .name = TIMED_GPIO_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init timed_gpio_init(void)
+{
+ return platform_driver_register(&timed_gpio_driver);
+}
+
+static void __exit timed_gpio_exit(void)
+{
+ platform_driver_unregister(&timed_gpio_driver);
+}
+
+module_init(timed_gpio_init);
+module_exit(timed_gpio_exit);
+
+MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>");
+MODULE_DESCRIPTION("timed gpio driver");
+MODULE_LICENSE("GPL");
diff --git a/stblinux-2.6.37/drivers/staging/android/timed_gpio.h b/stblinux-2.6.37/drivers/staging/android/timed_gpio.h
new file mode 100644
index 0000000..a0e15f8
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/timed_gpio.h
@@ -0,0 +1,33 @@
+/* include/linux/timed_gpio.h
+ *
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+*/
+
+#ifndef _LINUX_TIMED_GPIO_H
+#define _LINUX_TIMED_GPIO_H
+
+#define TIMED_GPIO_NAME "timed-gpio"
+
+struct timed_gpio {
+ const char *name;
+ unsigned gpio;
+ int max_timeout;
+ u8 active_low;
+};
+
+struct timed_gpio_platform_data {
+ int num_gpios;
+ struct timed_gpio *gpios;
+};
+
+#endif
diff --git a/stblinux-2.6.37/drivers/staging/android/timed_output.c b/stblinux-2.6.37/drivers/staging/android/timed_output.c
new file mode 100644
index 0000000..62e7918
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/timed_output.c
@@ -0,0 +1,121 @@
+/* drivers/misc/timed_output.c
+ *
+ * Copyright (C) 2009 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/err.h>
+
+#include "timed_output.h"
+
+static struct class *timed_output_class;
+static atomic_t device_count;
+
+static ssize_t enable_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct timed_output_dev *tdev = dev_get_drvdata(dev);
+ int remaining = tdev->get_time(tdev);
+
+ return sprintf(buf, "%d\n", remaining);
+}
+
+static ssize_t enable_store(
+ struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct timed_output_dev *tdev = dev_get_drvdata(dev);
+ int value;
+
+ sscanf(buf, "%d", &value);
+ tdev->enable(tdev, value);
+
+ return size;
+}
+
+static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, enable_show, enable_store);
+
+static int create_timed_output_class(void)
+{
+ if (!timed_output_class) {
+ timed_output_class = class_create(THIS_MODULE, "timed_output");
+ if (IS_ERR(timed_output_class))
+ return PTR_ERR(timed_output_class);
+ atomic_set(&device_count, 0);
+ }
+
+ return 0;
+}
+
+int timed_output_dev_register(struct timed_output_dev *tdev)
+{
+ int ret;
+
+ if (!tdev || !tdev->name || !tdev->enable || !tdev->get_time)
+ return -EINVAL;
+
+ ret = create_timed_output_class();
+ if (ret < 0)
+ return ret;
+
+ tdev->index = atomic_inc_return(&device_count);
+ tdev->dev = device_create(timed_output_class, NULL,
+ MKDEV(0, tdev->index), NULL, tdev->name);
+ if (IS_ERR(tdev->dev))
+ return PTR_ERR(tdev->dev);
+
+ ret = device_create_file(tdev->dev, &dev_attr_enable);
+ if (ret < 0)
+ goto err_create_file;
+
+ dev_set_drvdata(tdev->dev, tdev);
+ tdev->state = 0;
+ return 0;
+
+err_create_file:
+ device_destroy(timed_output_class, MKDEV(0, tdev->index));
+ printk(KERN_ERR "timed_output: Failed to register driver %s\n",
+ tdev->name);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(timed_output_dev_register);
+
+void timed_output_dev_unregister(struct timed_output_dev *tdev)
+{
+ device_remove_file(tdev->dev, &dev_attr_enable);
+ device_destroy(timed_output_class, MKDEV(0, tdev->index));
+ dev_set_drvdata(tdev->dev, NULL);
+}
+EXPORT_SYMBOL_GPL(timed_output_dev_unregister);
+
+static int __init timed_output_init(void)
+{
+ return create_timed_output_class();
+}
+
+static void __exit timed_output_exit(void)
+{
+ class_destroy(timed_output_class);
+}
+
+module_init(timed_output_init);
+module_exit(timed_output_exit);
+
+MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>");
+MODULE_DESCRIPTION("timed output class driver");
+MODULE_LICENSE("GPL");
diff --git a/stblinux-2.6.37/drivers/staging/android/timed_output.h b/stblinux-2.6.37/drivers/staging/android/timed_output.h
new file mode 100644
index 0000000..ec907ab
--- /dev/null
+++ b/stblinux-2.6.37/drivers/staging/android/timed_output.h
@@ -0,0 +1,37 @@
+/* include/linux/timed_output.h
+ *
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+*/
+
+#ifndef _LINUX_TIMED_OUTPUT_H
+#define _LINUX_TIMED_OUTPUT_H
+
+struct timed_output_dev {
+ const char *name;
+
+ /* enable the output and set the timer */
+ void (*enable)(struct timed_output_dev *sdev, int timeout);
+
+ /* returns the current number of milliseconds remaining on the timer */
+ int (*get_time)(struct timed_output_dev *sdev);
+
+ /* private data */
+ struct device *dev;
+ int index;
+ int state;
+};
+
+extern int timed_output_dev_register(struct timed_output_dev *dev);
+extern void timed_output_dev_unregister(struct timed_output_dev *dev);
+
+#endif
diff --git a/stblinux-2.6.37/drivers/switch/Kconfig b/stblinux-2.6.37/drivers/switch/Kconfig
new file mode 100644
index 0000000..5238591
--- /dev/null
+++ b/stblinux-2.6.37/drivers/switch/Kconfig
@@ -0,0 +1,15 @@
+menuconfig SWITCH
+ tristate "Switch class support"
+ help
+ Say Y here to enable switch class support. This allows
+ monitoring switches by userspace via sysfs and uevent.
+
+if SWITCH
+
+config SWITCH_GPIO
+ tristate "GPIO Swith support"
+ depends on GENERIC_GPIO
+ help
+ Say Y here to enable GPIO based switch support.
+
+endif # SWITCH
diff --git a/stblinux-2.6.37/drivers/switch/Makefile b/stblinux-2.6.37/drivers/switch/Makefile
new file mode 100644
index 0000000..f7606ed
--- /dev/null
+++ b/stblinux-2.6.37/drivers/switch/Makefile
@@ -0,0 +1,4 @@
+# Switch Class Driver
+obj-$(CONFIG_SWITCH) += switch_class.o
+obj-$(CONFIG_SWITCH_GPIO) += switch_gpio.o
+
diff --git a/stblinux-2.6.37/drivers/switch/switch_class.c b/stblinux-2.6.37/drivers/switch/switch_class.c
new file mode 100644
index 0000000..e05fc25
--- /dev/null
+++ b/stblinux-2.6.37/drivers/switch/switch_class.c
@@ -0,0 +1,174 @@
+/*
+ * drivers/switch/switch_class.c
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+*/
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/err.h>
+#include <linux/switch.h>
+
+struct class *switch_class;
+static atomic_t device_count;
+
+static ssize_t state_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct switch_dev *sdev = (struct switch_dev *)
+ dev_get_drvdata(dev);
+
+ if (sdev->print_state) {
+ int ret = sdev->print_state(sdev, buf);
+ if (ret >= 0)
+ return ret;
+ }
+ return sprintf(buf, "%d\n", sdev->state);
+}
+
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct switch_dev *sdev = (struct switch_dev *)
+ dev_get_drvdata(dev);
+
+ if (sdev->print_name) {
+ int ret = sdev->print_name(sdev, buf);
+ if (ret >= 0)
+ return ret;
+ }
+ return sprintf(buf, "%s\n", sdev->name);
+}
+
+static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, state_show, NULL);
+static DEVICE_ATTR(name, S_IRUGO | S_IWUSR, name_show, NULL);
+
+void switch_set_state(struct switch_dev *sdev, int state)
+{
+ char name_buf[120];
+ char state_buf[120];
+ char *prop_buf;
+ char *envp[3];
+ int env_offset = 0;
+ int length;
+
+ if (sdev->state != state) {
+ sdev->state = state;
+
+ prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
+ if (prop_buf) {
+ length = name_show(sdev->dev, NULL, prop_buf);
+ if (length > 0) {
+ if (prop_buf[length - 1] == '\n')
+ prop_buf[length - 1] = 0;
+ snprintf(name_buf, sizeof(name_buf),
+ "SWITCH_NAME=%s", prop_buf);
+ envp[env_offset++] = name_buf;
+ }
+ length = state_show(sdev->dev, NULL, prop_buf);
+ if (length > 0) {
+ if (prop_buf[length - 1] == '\n')
+ prop_buf[length - 1] = 0;
+ snprintf(state_buf, sizeof(state_buf),
+ "SWITCH_STATE=%s", prop_buf);
+ envp[env_offset++] = state_buf;
+ }
+ envp[env_offset] = NULL;
+ kobject_uevent_env(&sdev->dev->kobj, KOBJ_CHANGE, envp);
+ free_page((unsigned long)prop_buf);
+ } else {
+ printk(KERN_ERR "out of memory in switch_set_state\n");
+ kobject_uevent(&sdev->dev->kobj, KOBJ_CHANGE);
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(switch_set_state);
+
+static int create_switch_class(void)
+{
+ if (!switch_class) {
+ switch_class = class_create(THIS_MODULE, "switch");
+ if (IS_ERR(switch_class))
+ return PTR_ERR(switch_class);
+ atomic_set(&device_count, 0);
+ }
+
+ return 0;
+}
+
+int switch_dev_register(struct switch_dev *sdev)
+{
+ int ret;
+
+ if (!switch_class) {
+ ret = create_switch_class();
+ if (ret < 0)
+ return ret;
+ }
+
+ sdev->index = atomic_inc_return(&device_count);
+ sdev->dev = device_create(switch_class, NULL,
+ MKDEV(0, sdev->index), NULL, sdev->name);
+ if (IS_ERR(sdev->dev))
+ return PTR_ERR(sdev->dev);
+
+ ret = device_create_file(sdev->dev, &dev_attr_state);
+ if (ret < 0)
+ goto err_create_file_1;
+ ret = device_create_file(sdev->dev, &dev_attr_name);
+ if (ret < 0)
+ goto err_create_file_2;
+
+ dev_set_drvdata(sdev->dev, sdev);
+ sdev->state = 0;
+ return 0;
+
+err_create_file_2:
+ device_remove_file(sdev->dev, &dev_attr_state);
+err_create_file_1:
+ device_destroy(switch_class, MKDEV(0, sdev->index));
+ printk(KERN_ERR "switch: Failed to register driver %s\n", sdev->name);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(switch_dev_register);
+
+void switch_dev_unregister(struct switch_dev *sdev)
+{
+ device_remove_file(sdev->dev, &dev_attr_name);
+ device_remove_file(sdev->dev, &dev_attr_state);
+ device_destroy(switch_class, MKDEV(0, sdev->index));
+ dev_set_drvdata(sdev->dev, NULL);
+}
+EXPORT_SYMBOL_GPL(switch_dev_unregister);
+
+static int __init switch_class_init(void)
+{
+ return create_switch_class();
+}
+
+static void __exit switch_class_exit(void)
+{
+ class_destroy(switch_class);
+}
+
+module_init(switch_class_init);
+module_exit(switch_class_exit);
+
+MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>");
+MODULE_DESCRIPTION("Switch class driver");
+MODULE_LICENSE("GPL");
diff --git a/stblinux-2.6.37/drivers/switch/switch_gpio.c b/stblinux-2.6.37/drivers/switch/switch_gpio.c
new file mode 100644
index 0000000..b5f98ca
--- /dev/null
+++ b/stblinux-2.6.37/drivers/switch/switch_gpio.c
@@ -0,0 +1,171 @@
+/*
+ * drivers/switch/switch_gpio.c
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/switch.h>
+#include <linux/workqueue.h>
+#include <linux/gpio.h>
+
+struct gpio_switch_data {
+ struct switch_dev sdev;
+ unsigned gpio;
+ const char *name_on;
+ const char *name_off;
+ const char *state_on;
+ const char *state_off;
+ int irq;
+ struct work_struct work;
+};
+
+static void gpio_switch_work(struct work_struct *work)
+{
+ int state;
+ struct gpio_switch_data *data =
+ container_of(work, struct gpio_switch_data, work);
+
+ state = gpio_get_value(data->gpio);
+ switch_set_state(&data->sdev, state);
+}
+
+static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
+{
+ struct gpio_switch_data *switch_data =
+ (struct gpio_switch_data *)dev_id;
+
+ schedule_work(&switch_data->work);
+ return IRQ_HANDLED;
+}
+
+static ssize_t switch_gpio_print_state(struct switch_dev *sdev, char *buf)
+{
+ struct gpio_switch_data *switch_data =
+ container_of(sdev, struct gpio_switch_data, sdev);
+ const char *state;
+ if (switch_get_state(sdev))
+ state = switch_data->state_on;
+ else
+ state = switch_data->state_off;
+
+ if (state)
+ return sprintf(buf, "%s\n", state);
+ return -1;
+}
+
+static int gpio_switch_probe(struct platform_device *pdev)
+{
+ struct gpio_switch_platform_data *pdata = pdev->dev.platform_data;
+ struct gpio_switch_data *switch_data;
+ int ret = 0;
+
+ if (!pdata)
+ return -EBUSY;
+
+ switch_data = kzalloc(sizeof(struct gpio_switch_data), GFP_KERNEL);
+ if (!switch_data)
+ return -ENOMEM;
+
+ switch_data->sdev.name = pdata->name;
+ switch_data->gpio = pdata->gpio;
+ switch_data->name_on = pdata->name_on;
+ switch_data->name_off = pdata->name_off;
+ switch_data->state_on = pdata->state_on;
+ switch_data->state_off = pdata->state_off;
+ switch_data->sdev.print_state = switch_gpio_print_state;
+
+ ret = switch_dev_register(&switch_data->sdev);
+ if (ret < 0)
+ goto err_switch_dev_register;
+
+ ret = gpio_request(switch_data->gpio, pdev->name);
+ if (ret < 0)
+ goto err_request_gpio;
+
+ ret = gpio_direction_input(switch_data->gpio);
+ if (ret < 0)
+ goto err_set_gpio_input;
+
+ INIT_WORK(&switch_data->work, gpio_switch_work);
+
+ switch_data->irq = gpio_to_irq(switch_data->gpio);
+ if (switch_data->irq < 0) {
+ ret = switch_data->irq;
+ goto err_detect_irq_num_failed;
+ }
+
+ ret = request_irq(switch_data->irq, gpio_irq_handler,
+ IRQF_TRIGGER_LOW, pdev->name, switch_data);
+ if (ret < 0)
+ goto err_request_irq;
+
+ /* Perform initial detection */
+ gpio_switch_work(&switch_data->work);
+
+ return 0;
+
+err_request_irq:
+err_detect_irq_num_failed:
+err_set_gpio_input:
+ gpio_free(switch_data->gpio);
+err_request_gpio:
+ switch_dev_unregister(&switch_data->sdev);
+err_switch_dev_register:
+ kfree(switch_data);
+
+ return ret;
+}
+
+static int __devexit gpio_switch_remove(struct platform_device *pdev)
+{
+ struct gpio_switch_data *switch_data = platform_get_drvdata(pdev);
+
+ cancel_work_sync(&switch_data->work);
+ gpio_free(switch_data->gpio);
+ switch_dev_unregister(&switch_data->sdev);
+ kfree(switch_data);
+
+ return 0;
+}
+
+static struct platform_driver gpio_switch_driver = {
+ .probe = gpio_switch_probe,
+ .remove = __devexit_p(gpio_switch_remove),
+ .driver = {
+ .name = "switch-gpio",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init gpio_switch_init(void)
+{
+ return platform_driver_register(&gpio_switch_driver);
+}
+
+static void __exit gpio_switch_exit(void)
+{
+ platform_driver_unregister(&gpio_switch_driver);
+}
+
+module_init(gpio_switch_init);
+module_exit(gpio_switch_exit);
+
+MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>");
+MODULE_DESCRIPTION("GPIO Switch driver");
+MODULE_LICENSE("GPL");
diff --git a/stblinux-2.6.37/drivers/usb/gadget/Kconfig b/stblinux-2.6.37/drivers/usb/gadget/Kconfig
index 607d0db..4409f5a 100644
--- a/stblinux-2.6.37/drivers/usb/gadget/Kconfig
+++ b/stblinux-2.6.37/drivers/usb/gadget/Kconfig
@@ -827,6 +827,14 @@ config USB_G_PRINTER
For more information, see Documentation/usb/gadget_printer.txt
which includes sample code for accessing the device file.
+config USB_ANDROID
+ tristate "Android Gadget"
+ help
+ The Android gadget provides mass storage and adb transport.
+
+ Say "y" to link the driver statically, or "m" to build a
+ dynamically linked module called "g_android".
+
config USB_CDC_COMPOSITE
tristate "CDC Composite Device (Ethernet and ACM)"
depends on NET
diff --git a/stblinux-2.6.37/drivers/usb/gadget/Makefile b/stblinux-2.6.37/drivers/usb/gadget/Makefile
index 5780db4..789cd11 100644
--- a/stblinux-2.6.37/drivers/usb/gadget/Makefile
+++ b/stblinux-2.6.37/drivers/usb/gadget/Makefile
@@ -43,6 +43,7 @@ g_hid-y := hid.o
g_dbgp-y := dbgp.o
g_nokia-y := nokia.o
g_webcam-y := webcam.o
+g_android-y := android.o f_adb.o f_mass_storage.o
obj-$(CONFIG_USB_ZERO) += g_zero.o
obj-$(CONFIG_USB_AUDIO) += g_audio.o
@@ -60,3 +61,5 @@ obj-$(CONFIG_USB_G_DBGP) += g_dbgp.o
obj-$(CONFIG_USB_G_MULTI) += g_multi.o
obj-$(CONFIG_USB_G_NOKIA) += g_nokia.o
obj-$(CONFIG_USB_G_WEBCAM) += g_webcam.o
+obj-$(CONFIG_USB_ANDROID) += g_android.o
+
diff --git a/stblinux-2.6.37/drivers/usb/gadget/android.c b/stblinux-2.6.37/drivers/usb/gadget/android.c
new file mode 100644
index 0000000..2c175b0
--- /dev/null
+++ b/stblinux-2.6.37/drivers/usb/gadget/android.c
@@ -0,0 +1,354 @@
+/*
+ * Gadget Driver for Android
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+/* #define DEBUG */
+/* #define VERBOSE_DEBUG */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/utsname.h>
+#include <linux/miscdevice.h>
+#include <linux/platform_device.h>
+
+#include <linux/usb/android.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/composite.h>
+#include <linux/usb/gadget.h>
+
+#include "f_mass_storage.h"
+#include "f_adb.h"
+
+#include "gadget_chips.h"
+
+/*
+ * Kbuild is not very cooperative with respect to linking separately
+ * compiled library objects into one module. So for now we won't use
+ * separate compilation ... ensuring init/exit sections work to shrink
+ * the runtime footprint, and giving us at least some parts of what
+ * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
+ */
+#include "usbstring.c"
+#include "config.c"
+#include "epautoconf.c"
+#include "composite.c"
+
+MODULE_AUTHOR("Mike Lockwood");
+MODULE_DESCRIPTION("Android Composite USB Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0");
+
+static const char longname[] = "Gadget Android";
+
+/* Default vendor and product IDs, overridden by platform data */
+#define VENDOR_ID 0x18D1
+#define PRODUCT_ID 0x0001
+#define ADB_PRODUCT_ID 0x0002
+
+struct android_dev {
+ struct usb_composite_dev *cdev;
+
+ int product_id;
+ int adb_product_id;
+ int version;
+
+ int adb_enabled;
+ int nluns;
+};
+
+static atomic_t adb_enable_excl;
+static struct android_dev *_android_dev;
+
+/* string IDs are assigned dynamically */
+
+#define STRING_MANUFACTURER_IDX 0
+#define STRING_PRODUCT_IDX 1
+#define STRING_SERIAL_IDX 2
+
+/* String Table */
+static struct usb_string strings_dev[] = {
+ /* These dummy values should be overridden by platform data */
+ [STRING_MANUFACTURER_IDX].s = "Android",
+ [STRING_PRODUCT_IDX].s = "Android",
+ [STRING_SERIAL_IDX].s = "0123456789ABCDEF",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings stringtab_dev = {
+ .language = 0x0409, /* en-us */
+ .strings = strings_dev,
+};
+
+static struct usb_gadget_strings *dev_strings[] = {
+ &stringtab_dev,
+ NULL,
+};
+
+static struct usb_device_descriptor device_desc = {
+ .bLength = sizeof(device_desc),
+ .bDescriptorType = USB_DT_DEVICE,
+ .bcdUSB = __constant_cpu_to_le16(0x0200),
+ .bDeviceClass = USB_CLASS_PER_INTERFACE,
+ .idVendor = __constant_cpu_to_le16(VENDOR_ID),
+ .idProduct = __constant_cpu_to_le16(PRODUCT_ID),
+ .bcdDevice = __constant_cpu_to_le16(0xffff),
+ .bNumConfigurations = 1,
+};
+
+void android_usb_set_connected(int connected)
+{
+ if (_android_dev && _android_dev->cdev && _android_dev->cdev->gadget) {
+ if (connected)
+ usb_gadget_connect(_android_dev->cdev->gadget);
+ else
+ usb_gadget_disconnect(_android_dev->cdev->gadget);
+ }
+}
+
+static int __init android_bind_config(struct usb_configuration *c)
+{
+ struct android_dev *dev = _android_dev;
+ int ret;
+ printk(KERN_DEBUG "android_bind_config\n");
+
+ ret = mass_storage_function_add(dev->cdev, c, dev->nluns);
+ if (ret)
+ return ret;
+ return adb_function_add(dev->cdev, c);
+}
+
+static struct usb_configuration android_config_driver = {
+ .label = "android",
+ .bind = android_bind_config,
+ .bConfigurationValue = 1,
+ .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
+ .bMaxPower = 0xFA, /* 500ma */
+};
+
+static int __init android_bind(struct usb_composite_dev *cdev)
+{
+ struct android_dev *dev = _android_dev;
+ struct usb_gadget *gadget = cdev->gadget;
+ int gcnum;
+ int id;
+ int ret;
+
+ printk(KERN_INFO "android_bind\n");
+
+ /* Allocate string descriptor numbers ... note that string
+ * contents can be overridden by the composite_dev glue.
+ */
+ id = usb_string_id(cdev);
+ if (id < 0)
+ return id;
+ strings_dev[STRING_MANUFACTURER_IDX].id = id;
+ device_desc.iManufacturer = id;
+
+ id = usb_string_id(cdev);
+ if (id < 0)
+ return id;
+ strings_dev[STRING_PRODUCT_IDX].id = id;
+ device_desc.iProduct = id;
+
+ id = usb_string_id(cdev);
+ if (id < 0)
+ return id;
+ strings_dev[STRING_SERIAL_IDX].id = id;
+ device_desc.iSerialNumber = id;
+
+ if (gadget->ops->wakeup)
+ android_config_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+
+ /* register our configuration */
+ ret = usb_add_config(cdev, &android_config_driver);
+ if (ret) {
+ printk(KERN_ERR "usb_add_config failed\n");
+ return ret;
+ }
+
+ gcnum = usb_gadget_controller_number(gadget);
+ if (gcnum >= 0)
+ device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
+ else {
+ /* gadget zero is so simple (for now, no altsettings) that
+ * it SHOULD NOT have problems with bulk-capable hardware.
+ * so just warn about unrcognized controllers -- don't panic.
+ *
+ * things like configuration and altsetting numbering
+ * can need hardware-specific attention though.
+ */
+ pr_warning("%s: controller '%s' not recognized\n",
+ longname, gadget->name);
+ device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
+ }
+
+ usb_gadget_set_selfpowered(gadget);
+ dev->cdev = cdev;
+
+ return 0;
+}
+
+static struct usb_composite_driver android_usb_driver = {
+ .name = "android_usb",
+ .dev = &device_desc,
+ .strings = dev_strings,
+ .bind = android_bind,
+};
+
+static void enable_adb(struct android_dev *dev, int enable)
+{
+ if (enable != dev->adb_enabled) {
+ dev->adb_enabled = enable;
+ adb_function_enable(enable);
+
+ /* set product ID to the appropriate value */
+ if (enable)
+ device_desc.idProduct =
+ __constant_cpu_to_le16(dev->adb_product_id);
+ else
+ device_desc.idProduct =
+ __constant_cpu_to_le16(dev->product_id);
+ if (dev->cdev)
+ dev->cdev->desc.idProduct = device_desc.idProduct;
+
+ /* force reenumeration */
+ if (dev->cdev && dev->cdev->gadget &&
+ dev->cdev->gadget->speed != USB_SPEED_UNKNOWN) {
+ usb_gadget_disconnect(dev->cdev->gadget);
+ msleep(10);
+ usb_gadget_connect(dev->cdev->gadget);
+ }
+ }
+}
+
+static int adb_enable_open(struct inode *ip, struct file *fp)
+{
+ if (atomic_inc_return(&adb_enable_excl) != 1) {
+ atomic_dec(&adb_enable_excl);
+ return -EBUSY;
+ }
+
+ printk(KERN_INFO "enabling adb\n");
+ enable_adb(_android_dev, 1);
+
+ return 0;
+}
+
+static int adb_enable_release(struct inode *ip, struct file *fp)
+{
+ printk(KERN_INFO "disabling adb\n");
+ enable_adb(_android_dev, 0);
+ atomic_dec(&adb_enable_excl);
+ return 0;
+}
+
+static const struct file_operations adb_enable_fops = {
+ .owner = THIS_MODULE,
+ .open = adb_enable_open,
+ .release = adb_enable_release,
+};
+
+static struct miscdevice adb_enable_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "android_adb_enable",
+ .fops = &adb_enable_fops,
+};
+
+static int __init android_probe(struct platform_device *pdev)
+{
+ struct android_usb_platform_data *pdata = pdev->dev.platform_data;
+ struct android_dev *dev = _android_dev;
+
+ printk(KERN_INFO "android_probe pdata: %p\n", pdata);
+
+ if (pdata) {
+ if (pdata->vendor_id)
+ device_desc.idVendor =
+ __constant_cpu_to_le16(pdata->vendor_id);
+ if (pdata->product_id) {
+ dev->product_id = pdata->product_id;
+ device_desc.idProduct =
+ __constant_cpu_to_le16(pdata->product_id);
+ }
+ if (pdata->adb_product_id)
+ dev->adb_product_id = pdata->adb_product_id;
+ if (pdata->version)
+ dev->version = pdata->version;
+
+ if (pdata->product_name)
+ strings_dev[STRING_PRODUCT_IDX].s = pdata->product_name;
+ if (pdata->manufacturer_name)
+ strings_dev[STRING_MANUFACTURER_IDX].s =
+ pdata->manufacturer_name;
+ if (pdata->serial_number)
+ strings_dev[STRING_SERIAL_IDX].s = pdata->serial_number;
+ dev->nluns = pdata->nluns;
+ }
+
+ return 0;
+}
+
+static struct platform_driver android_platform_driver = {
+ .driver = { .name = "android_usb", },
+ .probe = android_probe,
+};
+
+static int __init init(void)
+{
+ struct android_dev *dev;
+ int ret;
+
+ printk(KERN_INFO "android init\n");
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ /* set default values, which should be overridden by platform data */
+ dev->product_id = PRODUCT_ID;
+ dev->adb_product_id = ADB_PRODUCT_ID;
+ _android_dev = dev;
+
+ ret = platform_driver_register(&android_platform_driver);
+ if (ret)
+ return ret;
+ ret = misc_register(&adb_enable_device);
+ if (ret) {
+ platform_driver_unregister(&android_platform_driver);
+ return ret;
+ }
+ ret = usb_composite_register(&android_usb_driver);
+ if (ret) {
+ misc_deregister(&adb_enable_device);
+ platform_driver_unregister(&android_platform_driver);
+ }
+ return ret;
+}
+module_init(init);
+
+static void __exit cleanup(void)
+{
+ usb_composite_unregister(&android_usb_driver);
+ misc_deregister(&adb_enable_device);
+ platform_driver_unregister(&android_platform_driver);
+ kfree(_android_dev);
+ _android_dev = NULL;
+}
+module_exit(cleanup);
diff --git a/stblinux-2.6.37/drivers/usb/gadget/f_adb.c b/stblinux-2.6.37/drivers/usb/gadget/f_adb.c
new file mode 100644
index 0000000..6ca5327
--- /dev/null
+++ b/stblinux-2.6.37/drivers/usb/gadget/f_adb.c
@@ -0,0 +1,668 @@
+/*
+ * Gadget Driver for Android ADB
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+/* #define DEBUG */
+/* #define VERBOSE_DEBUG */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/miscdevice.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/composite.h>
+#include <linux/usb/gadget.h>
+
+#include "f_adb.h"
+
+#define BULK_BUFFER_SIZE 4096
+
+/* number of rx and tx requests to allocate */
+#define RX_REQ_MAX 4
+#define TX_REQ_MAX 4
+
+static const char shortname[] = "android_adb";
+
+struct adb_dev {
+ struct usb_function function;
+ struct usb_composite_dev *cdev;
+ spinlock_t lock;
+
+ struct usb_ep *ep_in;
+ struct usb_ep *ep_out;
+
+ int online;
+ int error;
+
+ atomic_t read_excl;
+ atomic_t write_excl;
+ atomic_t open_excl;
+
+ struct list_head tx_idle;
+ struct list_head rx_idle;
+ struct list_head rx_done;
+
+ wait_queue_head_t read_wq;
+ wait_queue_head_t write_wq;
+
+ /* the request we're currently reading from */
+ struct usb_request *read_req;
+ unsigned char *read_buf;
+ unsigned read_count;
+};
+
+static struct usb_interface_descriptor adb_interface_desc = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = 0xFF,
+ .bInterfaceSubClass = 0x42,
+ .bInterfaceProtocol = 1,
+};
+
+static struct usb_endpoint_descriptor adb_highspeed_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = __constant_cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor adb_highspeed_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = __constant_cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor adb_fullspeed_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor adb_fullspeed_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *fs_adb_descs[] = {
+ (struct usb_descriptor_header *) &adb_interface_desc,
+ (struct usb_descriptor_header *) &adb_fullspeed_in_desc,
+ (struct usb_descriptor_header *) &adb_fullspeed_out_desc,
+ NULL,
+};
+
+static struct usb_descriptor_header *hs_adb_descs[] = {
+ (struct usb_descriptor_header *) &adb_interface_desc,
+ (struct usb_descriptor_header *) &adb_highspeed_in_desc,
+ (struct usb_descriptor_header *) &adb_highspeed_out_desc,
+ NULL,
+};
+
+/* used when adb function is disabled */
+static struct usb_descriptor_header *null_adb_descs[] = {
+ NULL,
+};
+
+
+/* temporary variable used between adb_open() and adb_gadget_bind() */
+static struct adb_dev *_adb_dev;
+
+static inline struct adb_dev *func_to_dev(struct usb_function *f)
+{
+ return container_of(f, struct adb_dev, function);
+}
+
+
+static struct usb_request *adb_request_new(struct usb_ep *ep, int buffer_size)
+{
+ struct usb_request *req = usb_ep_alloc_request(ep, GFP_KERNEL);
+ if (!req)
+ return NULL;
+
+ /* now allocate buffers for the requests */
+ req->buf = kmalloc(buffer_size, GFP_KERNEL);
+ if (!req->buf) {
+ usb_ep_free_request(ep, req);
+ return NULL;
+ }
+
+ return req;
+}
+
+static void adb_request_free(struct usb_request *req, struct usb_ep *ep)
+{
+ if (req) {
+ kfree(req->buf);
+ usb_ep_free_request(ep, req);
+ }
+}
+
+static inline int _lock(atomic_t *excl)
+{
+ if (atomic_inc_return(excl) == 1) {
+ return 0;
+ } else {
+ atomic_dec(excl);
+ return -1;
+ }
+}
+
+static inline void _unlock(atomic_t *excl)
+{
+ atomic_dec(excl);
+}
+
+/* add a request to the tail of a list */
+void req_put(struct adb_dev *dev, struct list_head *head,
+ struct usb_request *req)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ list_add_tail(&req->list, head);
+ spin_unlock_irqrestore(&dev->lock, flags);
+}
+
+/* remove a request from the head of a list */
+struct usb_request *req_get(struct adb_dev *dev, struct list_head *head)
+{
+ unsigned long flags;
+ struct usb_request *req;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (list_empty(head)) {
+ req = 0;
+ } else {
+ req = list_first_entry(head, struct usb_request, list);
+ list_del(&req->list);
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return req;
+}
+
+static void adb_complete_in(struct usb_ep *ep, struct usb_request *req)
+{
+ struct adb_dev *dev = _adb_dev;
+
+ if (req->status != 0)
+ dev->error = 1;
+
+ req_put(dev, &dev->tx_idle, req);
+
+ wake_up(&dev->write_wq);
+}
+
+static void adb_complete_out(struct usb_ep *ep, struct usb_request *req)
+{
+ struct adb_dev *dev = _adb_dev;
+
+ if (req->status != 0) {
+ dev->error = 1;
+ req_put(dev, &dev->rx_idle, req);
+ } else {
+ req_put(dev, &dev->rx_done, req);
+ }
+
+ wake_up(&dev->read_wq);
+}
+
+static int __init create_bulk_endpoints(struct adb_dev *dev,
+ struct usb_endpoint_descriptor *in_desc,
+ struct usb_endpoint_descriptor *out_desc)
+{
+ struct usb_composite_dev *cdev = dev->cdev;
+ struct usb_request *req;
+ struct usb_ep *ep;
+ int i;
+
+ DBG(cdev, "create_bulk_endpoints dev: %p\n", dev);
+
+ ep = usb_ep_autoconfig(cdev->gadget, in_desc);
+ if (!ep) {
+ DBG(cdev, "usb_ep_autoconfig for ep_in failed\n");
+ return -ENODEV;
+ }
+ DBG(cdev, "usb_ep_autoconfig for ep_in got %s\n", ep->name);
+ dev->ep_in = ep;
+
+ ep = usb_ep_autoconfig(cdev->gadget, out_desc);
+ if (!ep) {
+ DBG(cdev, "usb_ep_autoconfig for ep_out failed\n");
+ return -ENODEV;
+ }
+ DBG(cdev, "usb_ep_autoconfig for adb ep_out got %s\n", ep->name);
+ dev->ep_out = ep;
+
+ /* now allocate requests for our endpoints */
+ for (i = 0; i < RX_REQ_MAX; i++) {
+ req = adb_request_new(dev->ep_out, BULK_BUFFER_SIZE);
+ if (!req)
+ goto fail;
+ req->complete = adb_complete_out;
+ req_put(dev, &dev->rx_idle, req);
+ }
+
+ for (i = 0; i < TX_REQ_MAX; i++) {
+ req = adb_request_new(dev->ep_in, BULK_BUFFER_SIZE);
+ if (!req)
+ goto fail;
+ req->complete = adb_complete_in;
+ req_put(dev, &dev->tx_idle, req);
+ }
+
+ return 0;
+
+fail:
+ printk(KERN_ERR "adb_bind() could not allocate requests\n");
+ return -1;
+}
+
+static ssize_t adb_read(struct file *fp, char __user *buf,
+ size_t count, loff_t *pos)
+{
+ struct adb_dev *dev = fp->private_data;
+ struct usb_composite_dev *cdev = dev->cdev;
+ struct usb_request *req;
+ int r = count, xfer;
+ int ret;
+
+ DBG(cdev, "adb_read(%d)\n", count);
+
+ if (_lock(&dev->read_excl))
+ return -EBUSY;
+
+ /* we will block until we're online */
+ while (!(dev->online || dev->error)) {
+ DBG(cdev, "adb_read: waiting for online state\n");
+ ret = wait_event_interruptible(dev->read_wq,
+ (dev->online || dev->error));
+ if (ret < 0) {
+ _unlock(&dev->read_excl);
+ return ret;
+ }
+ }
+
+ while (count > 0) {
+ if (dev->error) {
+ DBG(cdev, "adb_read dev->error\n");
+ r = -EIO;
+ break;
+ }
+
+ /* if we have idle read requests, get them queued */
+ while ((req = req_get(dev, &dev->rx_idle))) {
+requeue_req:
+ req->length = BULK_BUFFER_SIZE;
+ ret = usb_ep_queue(dev->ep_out, req, GFP_ATOMIC);
+
+ if (ret < 0) {
+ r = -EIO;
+ dev->error = 1;
+ req_put(dev, &dev->rx_idle, req);
+ goto fail;
+ } else {
+ DBG(cdev, "rx %p queue\n", req);
+ }
+ }
+
+ /* if we have data pending, give it to userspace */
+ if (dev->read_count > 0) {
+ if (dev->read_count < count)
+ xfer = dev->read_count;
+ else
+ xfer = count;
+
+ if (copy_to_user(buf, dev->read_buf, xfer)) {
+ r = -EFAULT;
+ break;
+ }
+ dev->read_buf += xfer;
+ dev->read_count -= xfer;
+ buf += xfer;
+ count -= xfer;
+
+ /* if we've emptied the buffer, release the request */
+ if (dev->read_count == 0) {
+ req_put(dev, &dev->rx_idle, dev->read_req);
+ dev->read_req = 0;
+ }
+ continue;
+ }
+
+ /* wait for a request to complete */
+ req = 0;
+ ret = wait_event_interruptible(dev->read_wq,
+ ((req = req_get(dev, &dev->rx_done)) || dev->error));
+ if (req != 0) {
+ /* if we got a 0-len one we need to put it back into
+ ** service. if we made it the current read req we'd
+ ** be stuck forever
+ */
+ if (req->actual == 0)
+ goto requeue_req;
+
+ dev->read_req = req;
+ dev->read_count = req->actual;
+ dev->read_buf = req->buf;
+ DBG(cdev, "rx %p %d\n", req, req->actual);
+ }
+
+ if (ret < 0) {
+ r = ret;
+ break;
+ }
+ }
+
+fail:
+ _unlock(&dev->read_excl);
+ DBG(cdev, "adb_read returning %d\n", r);
+ return r;
+}
+
+static ssize_t adb_write(struct file *fp, const char __user *buf,
+ size_t count, loff_t *pos)
+{
+ struct adb_dev *dev = fp->private_data;
+ struct usb_composite_dev *cdev = dev->cdev;
+ struct usb_request *req = 0;
+ int r = count, xfer;
+ int ret;
+
+ DBG(cdev, "adb_write(%d)\n", count);
+
+ if (_lock(&dev->write_excl))
+ return -EBUSY;
+
+ while (count > 0) {
+ if (dev->error) {
+ DBG(cdev, "adb_write dev->error\n");
+ r = -EIO;
+ break;
+ }
+
+ /* get an idle tx request to use */
+ req = 0;
+ ret = wait_event_interruptible(dev->write_wq,
+ ((req = req_get(dev, &dev->tx_idle)) || dev->error));
+
+ if (ret < 0) {
+ r = ret;
+ break;
+ }
+
+ if (req != 0) {
+ if (count > BULK_BUFFER_SIZE)
+ xfer = BULK_BUFFER_SIZE;
+ else
+ xfer = count;
+ if (copy_from_user(req->buf, buf, xfer)) {
+ r = -EFAULT;
+ break;
+ }
+
+ req->length = xfer;
+ ret = usb_ep_queue(dev->ep_in, req, GFP_ATOMIC);
+ if (ret < 0) {
+ DBG(cdev, "adb_write: xfer error %d\n", ret);
+ dev->error = 1;
+ r = -EIO;
+ break;
+ }
+
+ buf += xfer;
+ count -= xfer;
+
+ /* zero this so we don't try to free it on error exit */
+ req = 0;
+ }
+ }
+
+ if (req)
+ req_put(dev, &dev->tx_idle, req);
+
+ _unlock(&dev->write_excl);
+ DBG(cdev, "adb_write returning %d\n", r);
+ return r;
+}
+
+static int adb_open(struct inode *ip, struct file *fp)
+{
+ printk(KERN_INFO "adb_open\n");
+ if (_lock(&_adb_dev->open_excl))
+ return -EBUSY;
+
+ fp->private_data = _adb_dev;
+
+ /* clear the error latch */
+ _adb_dev->error = 0;
+
+ return 0;
+}
+
+static int adb_release(struct inode *ip, struct file *fp)
+{
+ printk(KERN_INFO "adb_release\n");
+ _unlock(&_adb_dev->open_excl);
+ return 0;
+}
+
+/* file operations for ADB device /dev/android_adb */
+static struct file_operations adb_fops = {
+ .owner = THIS_MODULE,
+ .read = adb_read,
+ .write = adb_write,
+ .open = adb_open,
+ .release = adb_release,
+};
+
+static struct miscdevice adb_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = shortname,
+ .fops = &adb_fops,
+};
+
+static int __init
+adb_function_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct adb_dev *dev = func_to_dev(f);
+ int id;
+ int ret;
+
+ dev->cdev = cdev;
+ DBG(cdev, "adb_function_bind dev: %p\n", dev);
+
+ /* allocate interface ID(s) */
+ id = usb_interface_id(c, f);
+ if (id < 0)
+ return id;
+ adb_interface_desc.bInterfaceNumber = id;
+
+ /* allocate endpoints */
+ ret = create_bulk_endpoints(dev, &adb_fullspeed_in_desc,
+ &adb_fullspeed_out_desc);
+ if (ret)
+ return ret;
+
+ /* support high speed hardware */
+ if (gadget_is_dualspeed(c->cdev->gadget)) {
+ adb_highspeed_in_desc.bEndpointAddress =
+ adb_fullspeed_in_desc.bEndpointAddress;
+ adb_highspeed_out_desc.bEndpointAddress =
+ adb_fullspeed_out_desc.bEndpointAddress;
+ }
+
+ DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+ f->name, dev->ep_in->name, dev->ep_out->name);
+ return 0;
+}
+
+static void
+adb_function_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct adb_dev *dev = func_to_dev(f);
+ struct usb_request *req;
+
+ spin_lock_irq(&dev->lock);
+
+ while ((req = req_get(dev, &dev->rx_idle)))
+ adb_request_free(req, dev->ep_out);
+ while ((req = req_get(dev, &dev->tx_idle)))
+ adb_request_free(req, dev->ep_in);
+
+ dev->online = 0;
+ dev->error = 1;
+ spin_unlock_irq(&dev->lock);
+
+ misc_deregister(&adb_device);
+ kfree(_adb_dev);
+ _adb_dev = NULL;
+}
+
+static int adb_function_set_alt(struct usb_function *f,
+ unsigned intf, unsigned alt)
+{
+ struct adb_dev *dev = func_to_dev(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
+ int ret;
+
+ DBG(cdev, "adb_function_set_alt intf: %d alt: %d\n", intf, alt);
+ ret = usb_ep_enable(dev->ep_in,
+ ep_choose(cdev->gadget,
+ &adb_highspeed_in_desc,
+ &adb_fullspeed_in_desc));
+ if (ret)
+ return ret;
+ ret = usb_ep_enable(dev->ep_out,
+ ep_choose(cdev->gadget,
+ &adb_highspeed_out_desc,
+ &adb_fullspeed_out_desc));
+ if (ret) {
+ usb_ep_disable(dev->ep_in);
+ return ret;
+ }
+ dev->online = 1;
+
+ /* readers may be blocked waiting for us to go online */
+ wake_up(&dev->read_wq);
+ return 0;
+}
+
+static void adb_function_disable(struct usb_function *f)
+{
+ struct adb_dev *dev = func_to_dev(f);
+ struct usb_composite_dev *cdev = dev->cdev;
+
+ DBG(cdev, "adb_function_disable\n");
+ dev->online = 0;
+ dev->error = 1;
+ usb_ep_disable(dev->ep_in);
+ usb_ep_disable(dev->ep_out);
+
+ /* readers may be blocked waiting for us to go online */
+ wake_up(&dev->read_wq);
+
+ VDBG(cdev, "%s disabled\n", dev->function.name);
+}
+
+int __init adb_function_add(struct usb_composite_dev *cdev,
+ struct usb_configuration *c)
+{
+ struct adb_dev *dev;
+ int ret;
+
+ printk(KERN_INFO "adb_function_add\n");
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ spin_lock_init(&dev->lock);
+
+ init_waitqueue_head(&dev->read_wq);
+ init_waitqueue_head(&dev->write_wq);
+
+ atomic_set(&dev->open_excl, 0);
+ atomic_set(&dev->read_excl, 0);
+ atomic_set(&dev->write_excl, 0);
+
+ INIT_LIST_HEAD(&dev->rx_idle);
+ INIT_LIST_HEAD(&dev->rx_done);
+ INIT_LIST_HEAD(&dev->tx_idle);
+
+ dev->cdev = cdev;
+ dev->function.name = "adb";
+ dev->function.descriptors = null_adb_descs;
+ dev->function.hs_descriptors = null_adb_descs;
+ dev->function.bind = adb_function_bind;
+ dev->function.unbind = adb_function_unbind;
+ dev->function.set_alt = adb_function_set_alt;
+ dev->function.disable = adb_function_disable;
+
+ /* _adb_dev must be set before calling usb_gadget_register_driver */
+ _adb_dev = dev;
+
+ ret = misc_register(&adb_device);
+ if (ret)
+ goto err1;
+ ret = usb_add_function(c, &dev->function);
+ if (ret)
+ goto err2;
+
+ return 0;
+
+err2:
+ misc_deregister(&adb_device);
+err1:
+ kfree(dev);
+ printk(KERN_ERR "adb gadget driver failed to initialize\n");
+ return ret;
+}
+
+void adb_function_enable(int enable)
+{
+ struct adb_dev *dev = _adb_dev;
+
+ if (dev) {
+ DBG(dev->cdev, "adb_function_enable(%s)\n",
+ enable ? "true" : "false");
+
+ if (enable) {
+ dev->function.descriptors = fs_adb_descs;
+ dev->function.hs_descriptors = hs_adb_descs;
+ } else {
+ dev->function.descriptors = null_adb_descs;
+ dev->function.hs_descriptors = null_adb_descs;
+ }
+ }
+}
+
diff --git a/stblinux-2.6.37/drivers/usb/gadget/f_adb.h b/stblinux-2.6.37/drivers/usb/gadget/f_adb.h
new file mode 100644
index 0000000..4854ff6
--- /dev/null
+++ b/stblinux-2.6.37/drivers/usb/gadget/f_adb.h
@@ -0,0 +1,25 @@
+/*
+ * Gadget Driver for Android ADB
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __F_ADB_H
+#define __F_ADB_H
+
+int adb_function_add(struct usb_composite_dev *cdev,
+ struct usb_configuration *c);
+void adb_function_enable(int enable);
+
+#endif /* __F_ADB_H */
diff --git a/stblinux-2.6.37/drivers/usb/gadget/f_mass_storage.h b/stblinux-2.6.37/drivers/usb/gadget/f_mass_storage.h
new file mode 100644
index 0000000..8e63ac0
--- /dev/null
+++ b/stblinux-2.6.37/drivers/usb/gadget/f_mass_storage.h
@@ -0,0 +1,52 @@
+/*
+ * drivers/usb/gadget/f_mass_storage.h
+ *
+ * Function Driver for USB Mass Storage
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * Based heavily on the file_storage gadget driver in
+ * drivers/usb/gadget/file_storage.c and licensed under the same terms:
+ *
+ * Copyright (C) 2003-2007 Alan Stern
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __F_MASS_STORAGE_H
+#define __F_MASS_STORAGE_H
+
+int mass_storage_function_add(struct usb_composite_dev *cdev,
+ struct usb_configuration *c, int nluns);
+
+#endif /* __F_MASS_STORAGE_H */
diff --git a/stblinux-2.6.37/include/linux/android_aid.h b/stblinux-2.6.37/include/linux/android_aid.h
new file mode 100644
index 0000000..7f16a14
--- /dev/null
+++ b/stblinux-2.6.37/include/linux/android_aid.h
@@ -0,0 +1,26 @@
+/* include/linux/android_aid.h
+ *
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _LINUX_ANDROID_AID_H
+#define _LINUX_ANDROID_AID_H
+
+/* AIDs that the kernel treats differently */
+#define AID_NET_BT_ADMIN 3001
+#define AID_NET_BT 3002
+#define AID_INET 3003
+#define AID_NET_RAW 3004
+#define AID_NET_ADMIN 3005
+
+#endif
diff --git a/stblinux-2.6.37/include/linux/android_alarm.h b/stblinux-2.6.37/include/linux/android_alarm.h
new file mode 100644
index 0000000..d0cafd6
--- /dev/null
+++ b/stblinux-2.6.37/include/linux/android_alarm.h
@@ -0,0 +1,62 @@
+/* include/linux/android_alarm.h
+ *
+ * Copyright (C) 2006-2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _LINUX_ANDROID_ALARM_H
+#define _LINUX_ANDROID_ALARM_H
+
+#include <linux/ioctl.h>
+#include <linux/time.h>
+
+enum android_alarm_type {
+ /* return code bit numbers or set alarm arg */
+ ANDROID_ALARM_RTC_WAKEUP,
+ ANDROID_ALARM_RTC,
+ ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
+ ANDROID_ALARM_ELAPSED_REALTIME,
+ ANDROID_ALARM_SYSTEMTIME,
+
+ ANDROID_ALARM_TYPE_COUNT,
+
+ /* return code bit numbers */
+ /* ANDROID_ALARM_TIME_CHANGE = 16 */
+};
+
+enum android_alarm_return_flags {
+ ANDROID_ALARM_RTC_WAKEUP_MASK = 1U << ANDROID_ALARM_RTC_WAKEUP,
+ ANDROID_ALARM_RTC_MASK = 1U << ANDROID_ALARM_RTC,
+ ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK =
+ 1U << ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
+ ANDROID_ALARM_ELAPSED_REALTIME_MASK =
+ 1U << ANDROID_ALARM_ELAPSED_REALTIME,
+ ANDROID_ALARM_SYSTEMTIME_MASK = 1U << ANDROID_ALARM_SYSTEMTIME,
+ ANDROID_ALARM_TIME_CHANGE_MASK = 1U << 16
+};
+
+/* Disable alarm */
+#define ANDROID_ALARM_CLEAR(type) _IO('a', 0 | ((type) << 4))
+
+/* Ack last alarm and wait for next */
+#define ANDROID_ALARM_WAIT _IO('a', 1)
+
+#define ALARM_IOW(c, type, size) _IOW('a', (c) | ((type) << 4), size)
+/* Set alarm */
+#define ANDROID_ALARM_SET(type) ALARM_IOW(2, type, struct timespec)
+#define ANDROID_ALARM_SET_AND_WAIT(type) ALARM_IOW(3, type, struct timespec)
+#define ANDROID_ALARM_GET_TIME(type) ALARM_IOW(4, type, struct timespec)
+#define ANDROID_ALARM_SET_RTC _IOW('a', 5, struct timespec)
+#define ANDROID_ALARM_BASE_CMD(cmd) (cmd & ~(_IOC(0, 0, 0xf0, 0)))
+#define ANDROID_ALARM_IOCTL_TO_TYPE(cmd) (_IOC_NR(cmd) >> 4)
+
+#endif
diff --git a/stblinux-2.6.37/include/linux/android_pmem.h b/stblinux-2.6.37/include/linux/android_pmem.h
new file mode 100644
index 0000000..d845483
--- /dev/null
+++ b/stblinux-2.6.37/include/linux/android_pmem.h
@@ -0,0 +1,80 @@
+/* include/linux/android_pmem.h
+ *
+ * Copyright (C) 2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _ANDROID_PMEM_H_
+#define _ANDROID_PMEM_H_
+
+#define PMEM_IOCTL_MAGIC 'p'
+#define PMEM_GET_PHYS _IOW(PMEM_IOCTL_MAGIC, 1, unsigned int)
+#define PMEM_MAP _IOW(PMEM_IOCTL_MAGIC, 2, unsigned int)
+#define PMEM_GET_SIZE _IOW(PMEM_IOCTL_MAGIC, 3, unsigned int)
+#define PMEM_UNMAP _IOW(PMEM_IOCTL_MAGIC, 4, unsigned int)
+/* This ioctl will allocate pmem space, backing the file, it will fail
+ * if the file already has an allocation, pass it the len as the argument
+ * to the ioctl */
+#define PMEM_ALLOCATE _IOW(PMEM_IOCTL_MAGIC, 5, unsigned int)
+/* This will connect a one pmem file to another, pass the file that is already
+ * backed in memory as the argument to the ioctl
+ */
+#define PMEM_CONNECT _IOW(PMEM_IOCTL_MAGIC, 6, unsigned int)
+/* Returns the total size of the pmem region it is sent to as a pmem_region
+ * struct (with offset set to 0).
+ */
+#define PMEM_GET_TOTAL_SIZE _IOW(PMEM_IOCTL_MAGIC, 7, unsigned int)
+/* Revokes gpu registers and resets the gpu. Pass a pointer to the
+ * start of the mapped gpu regs (the vaddr returned by mmap) as the argument.
+ */
+#define HW3D_REVOKE_GPU _IOW(PMEM_IOCTL_MAGIC, 8, unsigned int)
+#define HW3D_GRANT_GPU _IOW(PMEM_IOCTL_MAGIC, 9, unsigned int)
+#define HW3D_WAIT_FOR_INTERRUPT _IOW(PMEM_IOCTL_MAGIC, 10, unsigned int)
+
+int get_pmem_file(int fd, unsigned long *start, unsigned long *vstart,
+ unsigned long *end, struct file **filp);
+int get_pmem_user_addr(struct file *file, unsigned long *start,
+ unsigned long *end);
+void put_pmem_file(struct file* file);
+void flush_pmem_file(struct file *file, unsigned long start, unsigned long len);
+
+struct android_pmem_platform_data
+{
+ const char* name;
+ /* starting physical address of memory region */
+ unsigned long start;
+ /* size of memory region */
+ unsigned long size;
+ /* set to indicate the region should not be managed with an allocator */
+ unsigned no_allocator;
+ /* set to indicate maps of this region should be cached, if a mix of
+ * cached and uncached is desired, set this and open the device with
+ * O_SYNC to get an uncached region */
+ unsigned cached;
+ /* The MSM7k has bits to enable a write buffer in the bus controller*/
+ unsigned buffered;
+};
+
+struct pmem_region {
+ unsigned long offset;
+ unsigned long len;
+};
+
+int pmem_setup(struct android_pmem_platform_data *pdata,
+ long (*ioctl)(struct file *, unsigned int, unsigned long),
+ int (*release)(struct inode *, struct file *));
+
+int pmem_remap(struct pmem_region *region, struct file *file,
+ unsigned operation);
+
+#endif //_ANDROID_PPP_H_
+
diff --git a/stblinux-2.6.37/include/linux/ashmem.h b/stblinux-2.6.37/include/linux/ashmem.h
new file mode 100644
index 0000000..1976b10
--- /dev/null
+++ b/stblinux-2.6.37/include/linux/ashmem.h
@@ -0,0 +1,48 @@
+/*
+ * include/linux/ashmem.h
+ *
+ * Copyright 2008 Google Inc.
+ * Author: Robert Love
+ *
+ * This file is dual licensed. It may be redistributed and/or modified
+ * under the terms of the Apache 2.0 License OR version 2 of the GNU
+ * General Public License.
+ */
+
+#ifndef _LINUX_ASHMEM_H
+#define _LINUX_ASHMEM_H
+
+#include <linux/limits.h>
+#include <linux/ioctl.h>
+
+#define ASHMEM_NAME_LEN 256
+
+#define ASHMEM_NAME_DEF "dev/ashmem"
+
+/* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
+#define ASHMEM_NOT_PURGED 0
+#define ASHMEM_WAS_PURGED 1
+
+/* Return values from ASHMEM_GET_PIN_STATUS: Is the mapping pinned? */
+#define ASHMEM_IS_UNPINNED 0
+#define ASHMEM_IS_PINNED 1
+
+struct ashmem_pin {
+ __u32 offset; /* offset into region, in bytes, page-aligned */
+ __u32 len; /* length forward from offset, in bytes, page-aligned */
+};
+
+#define __ASHMEMIOC 0x77
+
+#define ASHMEM_SET_NAME _IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN])
+#define ASHMEM_GET_NAME _IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN])
+#define ASHMEM_SET_SIZE _IOW(__ASHMEMIOC, 3, size_t)
+#define ASHMEM_GET_SIZE _IO(__ASHMEMIOC, 4)
+#define ASHMEM_SET_PROT_MASK _IOW(__ASHMEMIOC, 5, unsigned long)
+#define ASHMEM_GET_PROT_MASK _IO(__ASHMEMIOC, 6)
+#define ASHMEM_PIN _IOW(__ASHMEMIOC, 7, struct ashmem_pin)
+#define ASHMEM_UNPIN _IOW(__ASHMEMIOC, 8, struct ashmem_pin)
+#define ASHMEM_GET_PIN_STATUS _IO(__ASHMEMIOC, 9)
+#define ASHMEM_PURGE_ALL_CACHES _IO(__ASHMEMIOC, 10)
+
+#endif /* _LINUX_ASHMEM_H */
diff --git a/stblinux-2.6.37/include/linux/mm.h b/stblinux-2.6.37/include/linux/mm.h
index 721f451..b90daa9 100644
--- a/stblinux-2.6.37/include/linux/mm.h
+++ b/stblinux-2.6.37/include/linux/mm.h
@@ -746,6 +746,7 @@ extern void show_free_areas(void);
int shmem_lock(struct file *file, int lock, struct user_struct *user);
struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags);
+void shmem_set_file(struct vm_area_struct *vma, struct file *file);
int shmem_zero_setup(struct vm_area_struct *);
#ifndef CONFIG_MMU
diff --git a/stblinux-2.6.37/include/linux/switch.h b/stblinux-2.6.37/include/linux/switch.h
new file mode 100644
index 0000000..3e4c748
--- /dev/null
+++ b/stblinux-2.6.37/include/linux/switch.h
@@ -0,0 +1,53 @@
+/*
+ * Switch class driver
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+*/
+
+#ifndef __LINUX_SWITCH_H__
+#define __LINUX_SWITCH_H__
+
+struct switch_dev {
+ const char *name;
+ struct device *dev;
+ int index;
+ int state;
+
+ ssize_t (*print_name)(struct switch_dev *sdev, char *buf);
+ ssize_t (*print_state)(struct switch_dev *sdev, char *buf);
+};
+
+struct gpio_switch_platform_data {
+ const char *name;
+ unsigned gpio;
+
+ /* if NULL, switch_dev.name will be printed */
+ const char *name_on;
+ const char *name_off;
+ /* if NULL, "0" or "1" will be printed */
+ const char *state_on;
+ const char *state_off;
+};
+
+extern int switch_dev_register(struct switch_dev *sdev);
+extern void switch_dev_unregister(struct switch_dev *sdev);
+
+static inline int switch_get_state(struct switch_dev *sdev)
+{
+ return sdev->state;
+}
+
+extern void switch_set_state(struct switch_dev *sdev, int state);
+
+#endif /* __LINUX_SWITCH_H__ */
diff --git a/stblinux-2.6.37/include/linux/usb/android.h b/stblinux-2.6.37/include/linux/usb/android.h
new file mode 100644
index 0000000..bf9dfe7
--- /dev/null
+++ b/stblinux-2.6.37/include/linux/usb/android.h
@@ -0,0 +1,42 @@
+/*
+ * Platform data for Android USB
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#ifndef __LINUX_USB_ANDROID_H
+#define __LINUX_USB_ANDROID_H
+
+struct android_usb_platform_data {
+ /* USB device descriptor fields */
+ __u16 vendor_id;
+
+ /* Default product ID. */
+ __u16 product_id;
+
+ /* Product ID when adb is enabled. */
+ __u16 adb_product_id;
+
+ __u16 version;
+
+ char *product_name;
+ char *manufacturer_name;
+ char *serial_number;
+
+ /* number of LUNS for mass storage function */
+ int nluns;
+};
+
+extern void android_usb_set_connected(int on);
+
+#endif /* __LINUX_USB_ANDROID_H */
diff --git a/stblinux-2.6.37/init/Kconfig b/stblinux-2.6.37/init/Kconfig
index c972899..5569886 100644
--- a/stblinux-2.6.37/init/Kconfig
+++ b/stblinux-2.6.37/init/Kconfig
@@ -1009,6 +1009,15 @@ config AIO
This option enables POSIX asynchronous I/O which may by used
by some high performance threaded applications. Disabling
this option saves about 7k.
+
+config ASHMEM
+ bool "Enable the Anonymous Shared Memory Subsystem"
+ default n
+ depends on SHMEM || TINY_SHMEM
+ help
+ The ashmem subsystem is a new shared memory allocator, similar to
+ POSIX SHM but with different behavior and sporting a simpler
+ file-based API.
config HAVE_PERF_EVENTS
bool
diff --git a/stblinux-2.6.37/kernel/power/Kconfig b/stblinux-2.6.37/kernel/power/Kconfig
index a5aff3e..36bca6f 100644
--- a/stblinux-2.6.37/kernel/power/Kconfig
+++ b/stblinux-2.6.37/kernel/power/Kconfig
@@ -248,6 +248,73 @@ config PM_OPS
config ARCH_HAS_OPP
bool
+
+config HAS_WAKELOCK
+ bool
+
+config HAS_EARLYSUSPEND
+ bool
+
+config WAKELOCK
+ bool "Wake lock"
+ depends on PM && RTC_CLASS
+ default n
+ select HAS_WAKELOCK
+ ---help---
+ Enable wakelocks. When user space request a sleep state the
+ sleep request will be delayed until no wake locks are held.
+
+config WAKELOCK_STAT
+ bool "Wake lock stats"
+ depends on WAKELOCK
+ default y
+ ---help---
+ Report wake lock stats in /proc/wakelocks
+
+config USER_WAKELOCK
+ bool "Userspace wake locks"
+ depends on WAKELOCK
+ default y
+ ---help---
+ User-space wake lock api. Write "lockname" or "lockname timeout"
+ to /sys/power/wake_lock lock and if needed create a wake lock.
+ Write "lockname" to /sys/power/wake_unlock to unlock a user wake
+ lock.
+
+config EARLYSUSPEND
+ bool "Early suspend"
+ depends on WAKELOCK
+ default y
+ select HAS_EARLYSUSPEND
+ ---help---
+ Call early suspend handlers when the user requested sleep state
+ changes.
+
+choice
+ prompt "User-space screen access"
+ default FB_EARLYSUSPEND if !FRAMEBUFFER_CONSOLE
+ default CONSOLE_EARLYSUSPEND
+ depends on HAS_EARLYSUSPEND
+
+ config NO_USER_SPACE_SCREEN_ACCESS_CONTROL
+ bool "None"
+
+ config CONSOLE_EARLYSUSPEND
+ bool "Console switch on early-suspend"
+ depends on HAS_EARLYSUSPEND && VT
+ ---help---
+ Register early suspend handler to perform a console switch to
+ when user-space should stop drawing to the screen and a switch
+ back when it should resume.
+
+ config FB_EARLYSUSPEND
+ bool "Sysfs interface"
+ depends on HAS_EARLYSUSPEND
+ ---help---
+ Register early suspend handler that notifies and waits for
+ user-space through sysfs when user-space should stop drawing
+ to the screen and notifies user-space when it should resume.
+endchoice
config PM_OPP
bool "Operating Performance Point (OPP) Layer library"
diff --git a/stblinux-2.6.37/kernel/power/Makefile b/stblinux-2.6.37/kernel/power/Makefile
index f9063c6..c292957 100644
--- a/stblinux-2.6.37/kernel/power/Makefile
+++ b/stblinux-2.6.37/kernel/power/Makefile
@@ -6,6 +6,12 @@ endif
obj-$(CONFIG_PM) += main.o
obj-$(CONFIG_PM_SLEEP) += console.o
obj-$(CONFIG_FREEZER) += process.o
+obj-$(CONFIG_WAKELOCK) += wakelock.o
+obj-$(CONFIG_USER_WAKELOCK) += userwakelock.o
+obj-$(CONFIG_EARLYSUSPEND) += earlysuspend.o
+obj-$(CONFIG_CONSOLE_EARLYSUSPEND) += consoleearlysuspend.o
+obj-$(CONFIG_FB_EARLYSUSPEND) += fbearlysuspend.o
+obj-$(CONFIG_HIBERNATION) += swsusp.o disk.o snapshot.o swap.o user.o
obj-$(CONFIG_SUSPEND) += suspend.o
obj-$(CONFIG_PM_TEST_SUSPEND) += suspend_test.o
obj-$(CONFIG_HIBERNATION) += hibernate.o snapshot.o swap.o user.o \
diff --git a/stblinux-2.6.37/kernel/power/consoleearlysuspend.c b/stblinux-2.6.37/kernel/power/consoleearlysuspend.c
new file mode 100644
index 0000000..a8befb4
--- /dev/null
+++ b/stblinux-2.6.37/kernel/power/consoleearlysuspend.c
@@ -0,0 +1,78 @@
+/* kernel/power/consoleearlysuspend.c
+ *
+ * Copyright (C) 2005-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/console.h>
+#include <linux/earlysuspend.h>
+#include <linux/kbd_kern.h>
+#include <linux/module.h>
+#include <linux/vt_kern.h>
+#include <linux/wait.h>
+
+#define EARLY_SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
+
+static int orig_fgconsole;
+static void console_early_suspend(struct early_suspend *h)
+{
+ acquire_console_sem();
+ orig_fgconsole = fg_console;
+ if (vc_allocate(EARLY_SUSPEND_CONSOLE))
+ goto err;
+ if (set_console(EARLY_SUSPEND_CONSOLE))
+ goto err;
+ release_console_sem();
+
+ if (vt_waitactive(EARLY_SUSPEND_CONSOLE))
+ pr_warning("console_early_suspend: Can't switch VCs.\n");
+ return;
+err:
+ pr_warning("console_early_suspend: Can't set console\n");
+ release_console_sem();
+}
+
+static void console_late_resume(struct early_suspend *h)
+{
+ int ret;
+ acquire_console_sem();
+ ret = set_console(orig_fgconsole);
+ release_console_sem();
+ if (ret) {
+ pr_warning("console_late_resume: Can't set console.\n");
+ return;
+ }
+
+ if (vt_waitactive(orig_fgconsole))
+ pr_warning("console_late_resume: Can't switch VCs.\n");
+}
+
+static struct early_suspend console_early_suspend_desc = {
+ .level = EARLY_SUSPEND_LEVEL_STOP_DRAWING,
+ .suspend = console_early_suspend,
+ .resume = console_late_resume,
+};
+
+static int __init console_early_suspend_init(void)
+{
+ register_early_suspend(&console_early_suspend_desc);
+ return 0;
+}
+
+static void __exit console_early_suspend_exit(void)
+{
+ unregister_early_suspend(&console_early_suspend_desc);
+}
+
+module_init(console_early_suspend_init);
+module_exit(console_early_suspend_exit);
+
diff --git a/stblinux-2.6.37/kernel/power/disk.c b/stblinux-2.6.37/kernel/power/disk.c
new file mode 100644
index 0000000..4a4a206
--- /dev/null
+++ b/stblinux-2.6.37/kernel/power/disk.c
@@ -0,0 +1,926 @@
+/*
+ * kernel/power/disk.c - Suspend-to-disk support.
+ *
+ * Copyright (c) 2003 Patrick Mochel
+ * Copyright (c) 2003 Open Source Development Lab
+ * Copyright (c) 2004 Pavel Machek <pavel@suse.cz>
+ *
+ * This file is released under the GPLv2.
+ *
+ */
+
+#include <linux/suspend.h>
+#include <linux/syscalls.h>
+#include <linux/reboot.h>
+#include <linux/string.h>
+#include <linux/device.h>
+#include <linux/kmod.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/mount.h>
+#include <linux/pm.h>
+#include <linux/console.h>
+#include <linux/cpu.h>
+#include <linux/freezer.h>
+
+#include "power.h"
+
+
+static int noresume = 0;
+static char resume_file[256] = CONFIG_PM_STD_PARTITION;
+dev_t swsusp_resume_device;
+sector_t swsusp_resume_block;
+
+enum {
+ HIBERNATION_INVALID,
+ HIBERNATION_PLATFORM,
+ HIBERNATION_TEST,
+ HIBERNATION_TESTPROC,
+ HIBERNATION_SHUTDOWN,
+ HIBERNATION_REBOOT,
+ /* keep last */
+ __HIBERNATION_AFTER_LAST
+};
+#define HIBERNATION_MAX (__HIBERNATION_AFTER_LAST-1)
+#define HIBERNATION_FIRST (HIBERNATION_INVALID + 1)
+
+static int hibernation_mode = HIBERNATION_SHUTDOWN;
+
+static struct platform_hibernation_ops *hibernation_ops;
+
+/**
+ * hibernation_set_ops - set the global hibernate operations
+ * @ops: the hibernation operations to use in subsequent hibernation transitions
+ */
+
+void hibernation_set_ops(struct platform_hibernation_ops *ops)
+{
+ if (ops && !(ops->begin && ops->end && ops->pre_snapshot
+ && ops->prepare && ops->finish && ops->enter && ops->pre_restore
+ && ops->restore_cleanup)) {
+ WARN_ON(1);
+ return;
+ }
+ mutex_lock(&pm_mutex);
+ hibernation_ops = ops;
+ if (ops)
+ hibernation_mode = HIBERNATION_PLATFORM;
+ else if (hibernation_mode == HIBERNATION_PLATFORM)
+ hibernation_mode = HIBERNATION_SHUTDOWN;
+
+ mutex_unlock(&pm_mutex);
+}
+
+static bool entering_platform_hibernation;
+
+bool system_entering_hibernation(void)
+{
+ return entering_platform_hibernation;
+}
+EXPORT_SYMBOL(system_entering_hibernation);
+
+#ifdef CONFIG_PM_DEBUG
+static void hibernation_debug_sleep(void)
+{
+ printk(KERN_INFO "hibernation debug: Waiting for 5 seconds.\n");
+ mdelay(5000);
+}
+
+static int hibernation_testmode(int mode)
+{
+ if (hibernation_mode == mode) {
+ hibernation_debug_sleep();
+ return 1;
+ }
+ return 0;
+}
+
+static int hibernation_test(int level)
+{
+ if (pm_test_level == level) {
+ hibernation_debug_sleep();
+ return 1;
+ }
+ return 0;
+}
+#else /* !CONFIG_PM_DEBUG */
+static int hibernation_testmode(int mode) { return 0; }
+static int hibernation_test(int level) { return 0; }
+#endif /* !CONFIG_PM_DEBUG */
+
+/**
+ * platform_begin - tell the platform driver that we're starting
+ * hibernation
+ */
+
+static int platform_begin(int platform_mode)
+{
+ return (platform_mode && hibernation_ops) ?
+ hibernation_ops->begin() : 0;
+}
+
+/**
+ * platform_end - tell the platform driver that we've entered the
+ * working state
+ */
+
+static void platform_end(int platform_mode)
+{
+ if (platform_mode && hibernation_ops)
+ hibernation_ops->end();
+}
+
+/**
+ * platform_pre_snapshot - prepare the machine for hibernation using the
+ * platform driver if so configured and return an error code if it fails
+ */
+
+static int platform_pre_snapshot(int platform_mode)
+{
+ return (platform_mode && hibernation_ops) ?
+ hibernation_ops->pre_snapshot() : 0;
+}
+
+/**
+ * platform_leave - prepare the machine for switching to the normal mode
+ * of operation using the platform driver (called with interrupts disabled)
+ */
+
+static void platform_leave(int platform_mode)
+{
+ if (platform_mode && hibernation_ops)
+ hibernation_ops->leave();
+}
+
+/**
+ * platform_finish - switch the machine to the normal mode of operation
+ * using the platform driver (must be called after platform_prepare())
+ */
+
+static void platform_finish(int platform_mode)
+{
+ if (platform_mode && hibernation_ops)
+ hibernation_ops->finish();
+}
+
+/**
+ * platform_pre_restore - prepare the platform for the restoration from a
+ * hibernation image. If the restore fails after this function has been
+ * called, platform_restore_cleanup() must be called.
+ */
+
+static int platform_pre_restore(int platform_mode)
+{
+ return (platform_mode && hibernation_ops) ?
+ hibernation_ops->pre_restore() : 0;
+}
+
+/**
+ * platform_restore_cleanup - switch the platform to the normal mode of
+ * operation after a failing restore. If platform_pre_restore() has been
+ * called before the failing restore, this function must be called too,
+ * regardless of the result of platform_pre_restore().
+ */
+
+static void platform_restore_cleanup(int platform_mode)
+{
+ if (platform_mode && hibernation_ops)
+ hibernation_ops->restore_cleanup();
+}
+
+/**
+ * platform_recover - recover the platform from a failure to suspend
+ * devices.
+ */
+
+static void platform_recover(int platform_mode)
+{
+ if (platform_mode && hibernation_ops && hibernation_ops->recover)
+ hibernation_ops->recover();
+}
+
+/**
+ * create_image - freeze devices that need to be frozen with interrupts
+ * off, create the hibernation image and thaw those devices. Control
+ * reappears in this routine after a restore.
+ */
+
+static int create_image(int platform_mode)
+{
+ int error;
+
+ error = arch_prepare_suspend();
+ if (error)
+ return error;
+
+ device_pm_lock();
+ local_irq_disable();
+ /* At this point, device_suspend() has been called, but *not*
+ * device_power_down(). We *must* call device_power_down() now.
+ * Otherwise, drivers for some devices (e.g. interrupt controllers)
+ * become desynchronized with the actual state of the hardware
+ * at resume time, and evil weirdness ensues.
+ */
+ error = device_power_down(PMSG_FREEZE);
+ if (error) {
+ printk(KERN_ERR "PM: Some devices failed to power down, "
+ "aborting hibernation\n");
+ goto Enable_irqs;
+ }
+ sysdev_suspend(PMSG_FREEZE);
+ if (error) {
+ printk(KERN_ERR "PM: Some devices failed to power down, "
+ "aborting hibernation\n");
+ goto Power_up_devices;
+ }
+
+ if (hibernation_test(TEST_CORE))
+ goto Power_up;
+
+ in_suspend = 1;
+ save_processor_state();
+ error = swsusp_arch_suspend();
+ if (error)
+ printk(KERN_ERR "PM: Error %d creating hibernation image\n",
+ error);
+ /* Restore control flow magically appears here */
+ restore_processor_state();
+ if (!in_suspend)
+ platform_leave(platform_mode);
+ Power_up:
+ sysdev_resume();
+ /* NOTE: device_power_up() is just a resume() for devices
+ * that suspended with irqs off ... no overall powerup.
+ */
+ Power_up_devices:
+ device_power_up(in_suspend ?
+ (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
+ Enable_irqs:
+ local_irq_enable();
+ device_pm_unlock();
+ return error;
+}
+
+/**
+ * hibernation_snapshot - quiesce devices and create the hibernation
+ * snapshot image.
+ * @platform_mode - if set, use the platform driver, if available, to
+ * prepare the platform frimware for the power transition.
+ *
+ * Must be called with pm_mutex held
+ */
+
+int hibernation_snapshot(int platform_mode)
+{
+ int error;
+
+ error = platform_begin(platform_mode);
+ if (error)
+ return error;
+
+ /* Free memory before shutting down devices. */
+ error = swsusp_shrink_memory();
+ if (error)
+ goto Close;
+
+ suspend_console();
+ error = device_suspend(PMSG_FREEZE);
+ if (error)
+ goto Recover_platform;
+
+ if (hibernation_test(TEST_DEVICES))
+ goto Recover_platform;
+
+ error = platform_pre_snapshot(platform_mode);
+ if (error || hibernation_test(TEST_PLATFORM))
+ goto Finish;
+
+ error = disable_nonboot_cpus();
+ if (!error) {
+ if (hibernation_test(TEST_CPUS))
+ goto Enable_cpus;
+
+ if (hibernation_testmode(HIBERNATION_TEST))
+ goto Enable_cpus;
+
+ error = create_image(platform_mode);
+ /* Control returns here after successful restore */
+ }
+ Enable_cpus:
+ enable_nonboot_cpus();
+ Finish:
+ platform_finish(platform_mode);
+ Resume_devices:
+ device_resume(in_suspend ?
+ (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
+ resume_console();
+ Close:
+ platform_end(platform_mode);
+ return error;
+
+ Recover_platform:
+ platform_recover(platform_mode);
+ goto Resume_devices;
+}
+
+/**
+ * resume_target_kernel - prepare devices that need to be suspended with
+ * interrupts off, restore the contents of highmem that have not been
+ * restored yet from the image and run the low level code that will restore
+ * the remaining contents of memory and switch to the just restored target
+ * kernel.
+ */
+
+static int resume_target_kernel(void)
+{
+ int error;
+
+ device_pm_lock();
+ local_irq_disable();
+ error = device_power_down(PMSG_QUIESCE);
+ if (error) {
+ printk(KERN_ERR "PM: Some devices failed to power down, "
+ "aborting resume\n");
+ goto Enable_irqs;
+ }
+ sysdev_suspend(PMSG_QUIESCE);
+ /* We'll ignore saved state, but this gets preempt count (etc) right */
+ save_processor_state();
+ error = restore_highmem();
+ if (!error) {
+ error = swsusp_arch_resume();
+ /*
+ * The code below is only ever reached in case of a failure.
+ * Otherwise execution continues at place where
+ * swsusp_arch_suspend() was called
+ */
+ BUG_ON(!error);
+ /* This call to restore_highmem() undos the previous one */
+ restore_highmem();
+ }
+ /*
+ * The only reason why swsusp_arch_resume() can fail is memory being
+ * very tight, so we have to free it as soon as we can to avoid
+ * subsequent failures
+ */
+ swsusp_free();
+ restore_processor_state();
+ touch_softlockup_watchdog();
+ sysdev_resume();
+ device_power_up(PMSG_RECOVER);
+ Enable_irqs:
+ local_irq_enable();
+ device_pm_unlock();
+ return error;
+}
+
+/**
+ * hibernation_restore - quiesce devices and restore the hibernation
+ * snapshot image. If successful, control returns in hibernation_snaphot()
+ * @platform_mode - if set, use the platform driver, if available, to
+ * prepare the platform frimware for the transition.
+ *
+ * Must be called with pm_mutex held
+ */
+
+int hibernation_restore(int platform_mode)
+{
+ int error;
+
+ pm_prepare_console();
+ suspend_console();
+ error = device_suspend(PMSG_QUIESCE);
+ if (error)
+ goto Finish;
+
+ error = platform_pre_restore(platform_mode);
+ if (!error) {
+ error = disable_nonboot_cpus();
+ if (!error)
+ error = resume_target_kernel();
+ enable_nonboot_cpus();
+ }
+ platform_restore_cleanup(platform_mode);
+ device_resume(PMSG_RECOVER);
+ Finish:
+ resume_console();
+ pm_restore_console();
+ return error;
+}
+
+/**
+ * hibernation_platform_enter - enter the hibernation state using the
+ * platform driver (if available)
+ */
+
+int hibernation_platform_enter(void)
+{
+ int error;
+
+ if (!hibernation_ops)
+ return -ENOSYS;
+
+ /*
+ * We have cancelled the power transition by running
+ * hibernation_ops->finish() before saving the image, so we should let
+ * the firmware know that we're going to enter the sleep state after all
+ */
+ error = hibernation_ops->begin();
+ if (error)
+ goto Close;
+
+ entering_platform_hibernation = true;
+ suspend_console();
+ error = device_suspend(PMSG_HIBERNATE);
+ if (error) {
+ if (hibernation_ops->recover)
+ hibernation_ops->recover();
+ goto Resume_devices;
+ }
+
+ error = hibernation_ops->prepare();
+ if (error)
+ goto Resume_devices;
+
+ error = disable_nonboot_cpus();
+ if (error)
+ goto Finish;
+
+ device_pm_lock();
+ local_irq_disable();
+ error = device_power_down(PMSG_HIBERNATE);
+ if (!error) {
+ sysdev_suspend(PMSG_HIBERNATE);
+ hibernation_ops->enter();
+ /* We should never get here */
+ while (1);
+ }
+ local_irq_enable();
+ device_pm_unlock();
+
+ /*
+ * We don't need to reenable the nonboot CPUs or resume consoles, since
+ * the system is going to be halted anyway.
+ */
+ Finish:
+ hibernation_ops->finish();
+ Resume_devices:
+ entering_platform_hibernation = false;
+ device_resume(PMSG_RESTORE);
+ resume_console();
+ Close:
+ hibernation_ops->end();
+ return error;
+}
+
+/**
+ * power_down - Shut the machine down for hibernation.
+ *
+ * Use the platform driver, if configured so; otherwise try
+ * to power off or reboot.
+ */
+
+static void power_down(void)
+{
+ switch (hibernation_mode) {
+ case HIBERNATION_TEST:
+ case HIBERNATION_TESTPROC:
+ break;
+ case HIBERNATION_REBOOT:
+ kernel_restart(NULL);
+ break;
+ case HIBERNATION_PLATFORM:
+ hibernation_platform_enter();
+ case HIBERNATION_SHUTDOWN:
+ kernel_power_off();
+ break;
+ }
+ kernel_halt();
+ /*
+ * Valid image is on the disk, if we continue we risk serious data
+ * corruption after resume.
+ */
+ printk(KERN_CRIT "PM: Please power down manually\n");
+ while(1);
+}
+
+static int prepare_processes(void)
+{
+ int error = 0;
+
+ if (freeze_processes()) {
+ error = -EBUSY;
+ thaw_processes();
+ }
+ return error;
+}
+
+/**
+ * hibernate - The granpappy of the built-in hibernation management
+ */
+
+int hibernate(void)
+{
+ int error;
+
+ mutex_lock(&pm_mutex);
+ /* The snapshot device should not be opened while we're running */
+ if (!atomic_add_unless(&snapshot_device_available, -1, 0)) {
+ error = -EBUSY;
+ goto Unlock;
+ }
+
+ pm_prepare_console();
+ error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
+ if (error)
+ goto Exit;
+
+ error = usermodehelper_disable();
+ if (error)
+ goto Exit;
+
+ /* Allocate memory management structures */
+ error = create_basic_memory_bitmaps();
+ if (error)
+ goto Exit;
+
+ printk(KERN_INFO "PM: Syncing filesystems ... ");
+ sys_sync();
+ printk("done.\n");
+
+ error = prepare_processes();
+ if (error)
+ goto Finish;
+
+ if (hibernation_test(TEST_FREEZER))
+ goto Thaw;
+
+ if (hibernation_testmode(HIBERNATION_TESTPROC))
+ goto Thaw;
+
+ error = hibernation_snapshot(hibernation_mode == HIBERNATION_PLATFORM);
+ if (in_suspend && !error) {
+ unsigned int flags = 0;
+
+ if (hibernation_mode == HIBERNATION_PLATFORM)
+ flags |= SF_PLATFORM_MODE;
+ pr_debug("PM: writing image.\n");
+ error = swsusp_write(flags);
+ swsusp_free();
+ if (!error)
+ power_down();
+ } else {
+ pr_debug("PM: Image restored successfully.\n");
+ swsusp_free();
+ }
+ Thaw:
+ thaw_processes();
+ Finish:
+ free_basic_memory_bitmaps();
+ usermodehelper_enable();
+ Exit:
+ pm_notifier_call_chain(PM_POST_HIBERNATION);
+ pm_restore_console();
+ atomic_inc(&snapshot_device_available);
+ Unlock:
+ mutex_unlock(&pm_mutex);
+ return error;
+}
+
+
+/**
+ * software_resume - Resume from a saved image.
+ *
+ * Called as a late_initcall (so all devices are discovered and
+ * initialized), we call swsusp to see if we have a saved image or not.
+ * If so, we quiesce devices, the restore the saved image. We will
+ * return above (in hibernate() ) if everything goes well.
+ * Otherwise, we fail gracefully and return to the normally
+ * scheduled program.
+ *
+ */
+
+static int software_resume(void)
+{
+ int error;
+ unsigned int flags;
+
+ /*
+ * If the user said "noresume".. bail out early.
+ */
+ if (noresume)
+ return 0;
+
+ /*
+ * name_to_dev_t() below takes a sysfs buffer mutex when sysfs
+ * is configured into the kernel. Since the regular hibernate
+ * trigger path is via sysfs which takes a buffer mutex before
+ * calling hibernate functions (which take pm_mutex) this can
+ * cause lockdep to complain about a possible ABBA deadlock
+ * which cannot happen since we're in the boot code here and
+ * sysfs can't be invoked yet. Therefore, we use a subclass
+ * here to avoid lockdep complaining.
+ */
+ mutex_lock_nested(&pm_mutex, SINGLE_DEPTH_NESTING);
+ if (!swsusp_resume_device) {
+ if (!strlen(resume_file)) {
+ mutex_unlock(&pm_mutex);
+ return -ENOENT;
+ }
+ /*
+ * Some device discovery might still be in progress; we need
+ * to wait for this to finish.
+ */
+ wait_for_device_probe();
+ swsusp_resume_device = name_to_dev_t(resume_file);
+ pr_debug("PM: Resume from partition %s\n", resume_file);
+ } else {
+ pr_debug("PM: Resume from partition %d:%d\n",
+ MAJOR(swsusp_resume_device),
+ MINOR(swsusp_resume_device));
+ }
+
+ if (noresume) {
+ /**
+ * FIXME: If noresume is specified, we need to find the
+ * partition and reset it back to normal swap space.
+ */
+ mutex_unlock(&pm_mutex);
+ return 0;
+ }
+
+ pr_debug("PM: Checking hibernation image.\n");
+ error = swsusp_check();
+ if (error)
+ goto Unlock;
+
+ /* The snapshot device should not be opened while we're running */
+ if (!atomic_add_unless(&snapshot_device_available, -1, 0)) {
+ error = -EBUSY;
+ goto Unlock;
+ }
+
+ pm_prepare_console();
+ error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
+ if (error)
+ goto Finish;
+
+ error = usermodehelper_disable();
+ if (error)
+ goto Finish;
+
+ error = create_basic_memory_bitmaps();
+ if (error)
+ goto Finish;
+
+ pr_debug("PM: Preparing processes for restore.\n");
+ error = prepare_processes();
+ if (error) {
+ swsusp_close(FMODE_READ);
+ goto Done;
+ }
+
+ pr_debug("PM: Reading hibernation image.\n");
+
+ error = swsusp_read(&flags);
+ if (!error)
+ hibernation_restore(flags & SF_PLATFORM_MODE);
+
+ printk(KERN_ERR "PM: Restore failed, recovering.\n");
+ swsusp_free();
+ thaw_processes();
+ Done:
+ free_basic_memory_bitmaps();
+ usermodehelper_enable();
+ Finish:
+ pm_notifier_call_chain(PM_POST_RESTORE);
+ pm_restore_console();
+ atomic_inc(&snapshot_device_available);
+ /* For success case, the suspend path will release the lock */
+ Unlock:
+ mutex_unlock(&pm_mutex);
+ pr_debug("PM: Resume from disk failed.\n");
+ return error;
+}
+
+late_initcall(software_resume);
+
+
+static const char * const hibernation_modes[] = {
+ [HIBERNATION_PLATFORM] = "platform",
+ [HIBERNATION_SHUTDOWN] = "shutdown",
+ [HIBERNATION_REBOOT] = "reboot",
+ [HIBERNATION_TEST] = "test",
+ [HIBERNATION_TESTPROC] = "testproc",
+};
+
+/**
+ * disk - Control hibernation mode
+ *
+ * Suspend-to-disk can be handled in several ways. We have a few options
+ * for putting the system to sleep - using the platform driver (e.g. ACPI
+ * or other hibernation_ops), powering off the system or rebooting the
+ * system (for testing) as well as the two test modes.
+ *
+ * The system can support 'platform', and that is known a priori (and
+ * encoded by the presence of hibernation_ops). However, the user may
+ * choose 'shutdown' or 'reboot' as alternatives, as well as one fo the
+ * test modes, 'test' or 'testproc'.
+ *
+ * show() will display what the mode is currently set to.
+ * store() will accept one of
+ *
+ * 'platform'
+ * 'shutdown'
+ * 'reboot'
+ * 'test'
+ * 'testproc'
+ *
+ * It will only change to 'platform' if the system
+ * supports it (as determined by having hibernation_ops).
+ */
+
+static ssize_t disk_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ int i;
+ char *start = buf;
+
+ for (i = HIBERNATION_FIRST; i <= HIBERNATION_MAX; i++) {
+ if (!hibernation_modes[i])
+ continue;
+ switch (i) {
+ case HIBERNATION_SHUTDOWN:
+ case HIBERNATION_REBOOT:
+ case HIBERNATION_TEST:
+ case HIBERNATION_TESTPROC:
+ break;
+ case HIBERNATION_PLATFORM:
+ if (hibernation_ops)
+ break;
+ /* not a valid mode, continue with loop */
+ continue;
+ }
+ if (i == hibernation_mode)
+ buf += sprintf(buf, "[%s] ", hibernation_modes[i]);
+ else
+ buf += sprintf(buf, "%s ", hibernation_modes[i]);
+ }
+ buf += sprintf(buf, "\n");
+ return buf-start;
+}
+
+
+static ssize_t disk_store(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t n)
+{
+ int error = 0;
+ int i;
+ int len;
+ char *p;
+ int mode = HIBERNATION_INVALID;
+
+ p = memchr(buf, '\n', n);
+ len = p ? p - buf : n;
+
+ mutex_lock(&pm_mutex);
+ for (i = HIBERNATION_FIRST; i <= HIBERNATION_MAX; i++) {
+ if (len == strlen(hibernation_modes[i])
+ && !strncmp(buf, hibernation_modes[i], len)) {
+ mode = i;
+ break;
+ }
+ }
+ if (mode != HIBERNATION_INVALID) {
+ switch (mode) {
+ case HIBERNATION_SHUTDOWN:
+ case HIBERNATION_REBOOT:
+ case HIBERNATION_TEST:
+ case HIBERNATION_TESTPROC:
+ hibernation_mode = mode;
+ break;
+ case HIBERNATION_PLATFORM:
+ if (hibernation_ops)
+ hibernation_mode = mode;
+ else
+ error = -EINVAL;
+ }
+ } else
+ error = -EINVAL;
+
+ if (!error)
+ pr_debug("PM: Hibernation mode set to '%s'\n",
+ hibernation_modes[mode]);
+ mutex_unlock(&pm_mutex);
+ return error ? error : n;
+}
+
+power_attr(disk);
+
+static ssize_t resume_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf,"%d:%d\n", MAJOR(swsusp_resume_device),
+ MINOR(swsusp_resume_device));
+}
+
+static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t n)
+{
+ unsigned int maj, min;
+ dev_t res;
+ int ret = -EINVAL;
+
+ if (sscanf(buf, "%u:%u", &maj, &min) != 2)
+ goto out;
+
+ res = MKDEV(maj,min);
+ if (maj != MAJOR(res) || min != MINOR(res))
+ goto out;
+
+ mutex_lock(&pm_mutex);
+ swsusp_resume_device = res;
+ mutex_unlock(&pm_mutex);
+ printk(KERN_INFO "PM: Starting manual resume from disk\n");
+ noresume = 0;
+ software_resume();
+ ret = n;
+ out:
+ return ret;
+}
+
+power_attr(resume);
+
+static ssize_t image_size_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%lu\n", image_size);
+}
+
+static ssize_t image_size_store(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t n)
+{
+ unsigned long size;
+
+ if (sscanf(buf, "%lu", &size) == 1) {
+ image_size = size;
+ return n;
+ }
+
+ return -EINVAL;
+}
+
+power_attr(image_size);
+
+static struct attribute * g[] = {
+ &disk_attr.attr,
+ &resume_attr.attr,
+ &image_size_attr.attr,
+ NULL,
+};
+
+
+static struct attribute_group attr_group = {
+ .attrs = g,
+};
+
+
+static int __init pm_disk_init(void)
+{
+ return sysfs_create_group(power_kobj, &attr_group);
+}
+
+core_initcall(pm_disk_init);
+
+
+static int __init resume_setup(char *str)
+{
+ if (noresume)
+ return 1;
+
+ strncpy( resume_file, str, 255 );
+ return 1;
+}
+
+static int __init resume_offset_setup(char *str)
+{
+ unsigned long long offset;
+
+ if (noresume)
+ return 1;
+
+ if (sscanf(str, "%llu", &offset) == 1)
+ swsusp_resume_block = offset;
+
+ return 1;
+}
+
+static int __init noresume_setup(char *str)
+{
+ noresume = 1;
+ return 1;
+}
+
+__setup("noresume", noresume_setup);
+__setup("resume_offset=", resume_offset_setup);
+__setup("resume=", resume_setup);
diff --git a/stblinux-2.6.37/kernel/power/earlysuspend.c b/stblinux-2.6.37/kernel/power/earlysuspend.c
new file mode 100644
index 0000000..84bed51
--- /dev/null
+++ b/stblinux-2.6.37/kernel/power/earlysuspend.c
@@ -0,0 +1,178 @@
+/* kernel/power/earlysuspend.c
+ *
+ * Copyright (C) 2005-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/earlysuspend.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/rtc.h>
+#include <linux/syscalls.h> /* sys_sync */
+#include <linux/wakelock.h>
+#include <linux/workqueue.h>
+
+#include "power.h"
+
+enum {
+ DEBUG_USER_STATE = 1U << 0,
+ DEBUG_SUSPEND = 1U << 2,
+};
+static int debug_mask = DEBUG_USER_STATE;
+module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
+
+static DEFINE_MUTEX(early_suspend_lock);
+static LIST_HEAD(early_suspend_handlers);
+static void early_suspend(struct work_struct *work);
+static void late_resume(struct work_struct *work);
+static DECLARE_WORK(early_suspend_work, early_suspend);
+static DECLARE_WORK(late_resume_work, late_resume);
+static DEFINE_SPINLOCK(state_lock);
+enum {
+ SUSPEND_REQUESTED = 0x1,
+ SUSPENDED = 0x2,
+ SUSPEND_REQUESTED_AND_SUSPENDED = SUSPEND_REQUESTED | SUSPENDED,
+};
+static int state;
+
+void register_early_suspend(struct early_suspend *handler)
+{
+ struct list_head *pos;
+
+ mutex_lock(&early_suspend_lock);
+ list_for_each(pos, &early_suspend_handlers) {
+ struct early_suspend *e;
+ e = list_entry(pos, struct early_suspend, link);
+ if (e->level > handler->level)
+ break;
+ }
+ list_add_tail(&handler->link, pos);
+ if ((state & SUSPENDED) && handler->suspend)
+ handler->suspend(handler);
+ mutex_unlock(&early_suspend_lock);
+}
+EXPORT_SYMBOL(register_early_suspend);
+
+void unregister_early_suspend(struct early_suspend *handler)
+{
+ mutex_lock(&early_suspend_lock);
+ list_del(&handler->link);
+ mutex_unlock(&early_suspend_lock);
+}
+EXPORT_SYMBOL(unregister_early_suspend);
+
+static void early_suspend(struct work_struct *work)
+{
+ struct early_suspend *pos;
+ unsigned long irqflags;
+ int abort = 0;
+
+ mutex_lock(&early_suspend_lock);
+ spin_lock_irqsave(&state_lock, irqflags);
+ if (state == SUSPEND_REQUESTED)
+ state |= SUSPENDED;
+ else
+ abort = 1;
+ spin_unlock_irqrestore(&state_lock, irqflags);
+
+ if (abort) {
+ if (debug_mask & DEBUG_SUSPEND)
+ pr_info("early_suspend: abort, state %d\n", state);
+ mutex_unlock(&early_suspend_lock);
+ goto abort;
+ }
+
+ if (debug_mask & DEBUG_SUSPEND)
+ pr_info("early_suspend: call handlers\n");
+ list_for_each_entry(pos, &early_suspend_handlers, link) {
+ if (pos->suspend != NULL)
+ pos->suspend(pos);
+ }
+ mutex_unlock(&early_suspend_lock);
+
+ if (debug_mask & DEBUG_SUSPEND)
+ pr_info("early_suspend: sync\n");
+
+ sys_sync();
+abort:
+ spin_lock_irqsave(&state_lock, irqflags);
+ if (state == SUSPEND_REQUESTED_AND_SUSPENDED)
+ wake_unlock(&main_wake_lock);
+ spin_unlock_irqrestore(&state_lock, irqflags);
+}
+
+static void late_resume(struct work_struct *work)
+{
+ struct early_suspend *pos;
+ unsigned long irqflags;
+ int abort = 0;
+
+ mutex_lock(&early_suspend_lock);
+ spin_lock_irqsave(&state_lock, irqflags);
+ if (state == SUSPENDED)
+ state &= ~SUSPENDED;
+ else
+ abort = 1;
+ spin_unlock_irqrestore(&state_lock, irqflags);
+
+ if (abort) {
+ if (debug_mask & DEBUG_SUSPEND)
+ pr_info("late_resume: abort, state %d\n", state);
+ goto abort;
+ }
+ if (debug_mask & DEBUG_SUSPEND)
+ pr_info("late_resume: call handlers\n");
+ list_for_each_entry_reverse(pos, &early_suspend_handlers, link)
+ if (pos->resume != NULL)
+ pos->resume(pos);
+ if (debug_mask & DEBUG_SUSPEND)
+ pr_info("late_resume: done\n");
+abort:
+ mutex_unlock(&early_suspend_lock);
+}
+
+void request_suspend_state(suspend_state_t new_state)
+{
+ unsigned long irqflags;
+ int old_sleep;
+
+ spin_lock_irqsave(&state_lock, irqflags);
+ old_sleep = state & SUSPEND_REQUESTED;
+ if (debug_mask & DEBUG_USER_STATE) {
+ struct timespec ts;
+ struct rtc_time tm;
+ getnstimeofday(&ts);
+ rtc_time_to_tm(ts.tv_sec, &tm);
+ pr_info("request_suspend_state: %s (%d->%d) at %lld "
+ "(%d-%02d-%02d %02d:%02d:%02d.%09lu UTC)\n",
+ new_state != PM_SUSPEND_ON ? "sleep" : "wakeup",
+ requested_suspend_state, new_state,
+ ktime_to_ns(ktime_get()),
+ tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec, ts.tv_nsec);
+ }
+ if (!old_sleep && new_state != PM_SUSPEND_ON) {
+ state |= SUSPEND_REQUESTED;
+ queue_work(suspend_work_queue, &early_suspend_work);
+ } else if (old_sleep && new_state == PM_SUSPEND_ON) {
+ state &= ~SUSPEND_REQUESTED;
+ wake_lock(&main_wake_lock);
+ queue_work(suspend_work_queue, &late_resume_work);
+ }
+ requested_suspend_state = new_state;
+ spin_unlock_irqrestore(&state_lock, irqflags);
+}
+
+suspend_state_t get_suspend_state(void)
+{
+ return requested_suspend_state;
+}
diff --git a/stblinux-2.6.37/kernel/power/fbearlysuspend.c b/stblinux-2.6.37/kernel/power/fbearlysuspend.c
new file mode 100644
index 0000000..1513765
--- /dev/null
+++ b/stblinux-2.6.37/kernel/power/fbearlysuspend.c
@@ -0,0 +1,153 @@
+/* kernel/power/fbearlysuspend.c
+ *
+ * Copyright (C) 2005-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/earlysuspend.h>
+#include <linux/module.h>
+#include <linux/wait.h>
+
+#include "power.h"
+
+static wait_queue_head_t fb_state_wq;
+static DEFINE_SPINLOCK(fb_state_lock);
+static enum {
+ FB_STATE_STOPPED_DRAWING,
+ FB_STATE_REQUEST_STOP_DRAWING,
+ FB_STATE_DRAWING_OK,
+} fb_state;
+
+/* tell userspace to stop drawing, wait for it to stop */
+static void stop_drawing_early_suspend(struct early_suspend *h)
+{
+ int ret;
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&fb_state_lock, irq_flags);
+ fb_state = FB_STATE_REQUEST_STOP_DRAWING;
+ spin_unlock_irqrestore(&fb_state_lock, irq_flags);
+
+ wake_up_all(&fb_state_wq);
+ ret = wait_event_timeout(fb_state_wq,
+ fb_state == FB_STATE_STOPPED_DRAWING,
+ HZ);
+ if (unlikely(fb_state != FB_STATE_STOPPED_DRAWING))
+ pr_warning("stop_drawing_early_suspend: timeout waiting for "
+ "userspace to stop drawing\n");
+}
+
+/* tell userspace to start drawing */
+static void start_drawing_late_resume(struct early_suspend *h)
+{
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&fb_state_lock, irq_flags);
+ fb_state = FB_STATE_DRAWING_OK;
+ spin_unlock_irqrestore(&fb_state_lock, irq_flags);
+ wake_up(&fb_state_wq);
+}
+
+static struct early_suspend stop_drawing_early_suspend_desc = {
+ .level = EARLY_SUSPEND_LEVEL_STOP_DRAWING,
+ .suspend = stop_drawing_early_suspend,
+ .resume = start_drawing_late_resume,
+};
+
+static ssize_t wait_for_fb_sleep_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ char *s = buf;
+ int ret;
+
+ ret = wait_event_interruptible(fb_state_wq,
+ fb_state != FB_STATE_DRAWING_OK);
+ if (ret && fb_state == FB_STATE_DRAWING_OK)
+ return ret;
+ else
+ s += sprintf(buf, "sleeping");
+ return s - buf;
+}
+
+static ssize_t wait_for_fb_wake_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ char *s = buf;
+ int ret;
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&fb_state_lock, irq_flags);
+ if (fb_state == FB_STATE_REQUEST_STOP_DRAWING) {
+ fb_state = FB_STATE_STOPPED_DRAWING;
+ wake_up(&fb_state_wq);
+ }
+ spin_unlock_irqrestore(&fb_state_lock, irq_flags);
+
+ ret = wait_event_interruptible(fb_state_wq,
+ fb_state == FB_STATE_DRAWING_OK);
+ if (ret && fb_state != FB_STATE_DRAWING_OK)
+ return ret;
+ else
+ s += sprintf(buf, "awake");
+
+ return s - buf;
+}
+
+#define power_ro_attr(_name) \
+static struct kobj_attribute _name##_attr = { \
+ .attr = { \
+ .name = __stringify(_name), \
+ .mode = 0444, \
+ }, \
+ .show = _name##_show, \
+ .store = NULL, \
+}
+
+power_ro_attr(wait_for_fb_sleep);
+power_ro_attr(wait_for_fb_wake);
+
+static struct attribute *g[] = {
+ &wait_for_fb_sleep_attr.attr,
+ &wait_for_fb_wake_attr.attr,
+ NULL,
+};
+
+static struct attribute_group attr_group = {
+ .attrs = g,
+};
+
+static int __init android_power_init(void)
+{
+ int ret;
+
+ init_waitqueue_head(&fb_state_wq);
+ fb_state = FB_STATE_DRAWING_OK;
+
+ ret = sysfs_create_group(power_kobj, &attr_group);
+ if (ret) {
+ pr_err("android_power_init: sysfs_create_group failed\n");
+ return ret;
+ }
+
+ register_early_suspend(&stop_drawing_early_suspend_desc);
+ return 0;
+}
+
+static void __exit android_power_exit(void)
+{
+ unregister_early_suspend(&stop_drawing_early_suspend_desc);
+ sysfs_remove_group(power_kobj, &attr_group);
+}
+
+module_init(android_power_init);
+module_exit(android_power_exit);
+
diff --git a/stblinux-2.6.37/kernel/power/userwakelock.c b/stblinux-2.6.37/kernel/power/userwakelock.c
new file mode 100644
index 0000000..d7242d9
--- /dev/null
+++ b/stblinux-2.6.37/kernel/power/userwakelock.c
@@ -0,0 +1,218 @@
+/* kernel/power/userwakelock.c
+ *
+ * Copyright (C) 2005-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/ctype.h>
+#include <linux/module.h>
+#include <linux/wakelock.h>
+
+#include "power.h"
+
+enum {
+ DEBUG_FAILURE = BIT(0),
+ DEBUG_ERROR = BIT(1),
+ DEBUG_NEW = BIT(2),
+ DEBUG_ACCESS = BIT(3),
+ DEBUG_LOOKUP = BIT(4),
+};
+static int debug_mask = DEBUG_FAILURE;
+module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
+
+static DEFINE_MUTEX(tree_lock);
+
+struct user_wake_lock {
+ struct rb_node node;
+ struct wake_lock wake_lock;
+ char name[0];
+};
+struct rb_root user_wake_locks;
+
+static struct user_wake_lock *lookup_wake_lock_name(
+ const char *buf, int allocate, long *timeoutptr)
+{
+ struct rb_node **p = &user_wake_locks.rb_node;
+ struct rb_node *parent = NULL;
+ struct user_wake_lock *l;
+ int diff;
+ u64 timeout;
+ int name_len;
+ const char *arg;
+
+ /* Find length of lock name and start of optional timeout string */
+ arg = buf;
+ while (*arg && !isspace(*arg))
+ arg++;
+ name_len = arg - buf;
+ if (!name_len)
+ goto bad_arg;
+ while (isspace(*arg))
+ arg++;
+
+ /* Process timeout string */
+ if (timeoutptr && *arg) {
+ timeout = simple_strtoull(arg, (char **)&arg, 0);
+ while (isspace(*arg))
+ arg++;
+ if (*arg)
+ goto bad_arg;
+ /* convert timeout from nanoseconds to jiffies > 0 */
+ timeout += (NSEC_PER_SEC / HZ) - 1;
+ do_div(timeout, (NSEC_PER_SEC / HZ));
+ if (timeout <= 0)
+ timeout = 1;
+ *timeoutptr = timeout;
+ } else if (*arg)
+ goto bad_arg;
+ else if (timeoutptr)
+ *timeoutptr = 0;
+
+ /* Lookup wake lock in rbtree */
+ while (*p) {
+ parent = *p;
+ l = rb_entry(parent, struct user_wake_lock, node);
+ diff = strncmp(buf, l->name, name_len);
+ if (!diff && l->name[name_len])
+ diff = -1;
+ if (debug_mask & DEBUG_ERROR)
+ pr_info("lookup_wake_lock_name: compare %.*s %s %d\n",
+ name_len, buf, l->name, diff);
+
+ if (diff < 0)
+ p = &(*p)->rb_left;
+ else if (diff > 0)
+ p = &(*p)->rb_right;
+ else
+ return l;
+ }
+
+ /* Allocate and add new wakelock to rbtree */
+ if (!allocate) {
+ if (debug_mask & DEBUG_ERROR)
+ pr_info("lookup_wake_lock_name: %.*s not found\n",
+ name_len, buf);
+ return ERR_PTR(-EINVAL);
+ }
+ l = kzalloc(sizeof(*l) + name_len + 1, GFP_KERNEL);
+ if (l == NULL) {
+ if (debug_mask & DEBUG_FAILURE)
+ pr_err("lookup_wake_lock_name: failed to allocate "
+ "memory for %.*s\n", name_len, buf);
+ return ERR_PTR(-ENOMEM);
+ }
+ memcpy(l->name, buf, name_len);
+ if (debug_mask & DEBUG_NEW)
+ pr_info("lookup_wake_lock_name: new wake lock %s\n", l->name);
+ wake_lock_init(&l->wake_lock, WAKE_LOCK_SUSPEND, l->name);
+ rb_link_node(&l->node, parent, p);
+ rb_insert_color(&l->node, &user_wake_locks);
+ return l;
+
+bad_arg:
+ if (debug_mask & DEBUG_ERROR)
+ pr_info("lookup_wake_lock_name: wake lock, %.*s, bad arg, %s\n",
+ name_len, buf, arg);
+ return ERR_PTR(-EINVAL);
+}
+
+ssize_t wake_lock_show(
+ struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+ char *s = buf;
+ char *end = buf + PAGE_SIZE;
+ struct rb_node *n;
+ struct user_wake_lock *l;
+
+ mutex_lock(&tree_lock);
+
+ for (n = rb_first(&user_wake_locks); n != NULL; n = rb_next(n)) {
+ l = rb_entry(n, struct user_wake_lock, node);
+ if (wake_lock_active(&l->wake_lock))
+ s += scnprintf(s, end - s, "%s ", l->name);
+ }
+ s += scnprintf(s, end - s, "\n");
+
+ mutex_unlock(&tree_lock);
+ return (s - buf);
+}
+
+ssize_t wake_lock_store(
+ struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t n)
+{
+ long timeout;
+ struct user_wake_lock *l;
+
+ mutex_lock(&tree_lock);
+ l = lookup_wake_lock_name(buf, 1, &timeout);
+ if (IS_ERR(l)) {
+ n = PTR_ERR(l);
+ goto bad_name;
+ }
+
+ if (debug_mask & DEBUG_ACCESS)
+ pr_info("wake_lock_store: %s, timeout %ld\n", l->name, timeout);
+
+ if (timeout)
+ wake_lock_timeout(&l->wake_lock, timeout);
+ else
+ wake_lock(&l->wake_lock);
+bad_name:
+ mutex_unlock(&tree_lock);
+ return n;
+}
+
+
+ssize_t wake_unlock_show(
+ struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+ char *s = buf;
+ char *end = buf + PAGE_SIZE;
+ struct rb_node *n;
+ struct user_wake_lock *l;
+
+ mutex_lock(&tree_lock);
+
+ for (n = rb_first(&user_wake_locks); n != NULL; n = rb_next(n)) {
+ l = rb_entry(n, struct user_wake_lock, node);
+ if (!wake_lock_active(&l->wake_lock))
+ s += scnprintf(s, end - s, "%s ", l->name);
+ }
+ s += scnprintf(s, end - s, "\n");
+
+ mutex_unlock(&tree_lock);
+ return (s - buf);
+}
+
+ssize_t wake_unlock_store(
+ struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t n)
+{
+ struct user_wake_lock *l;
+
+ mutex_lock(&tree_lock);
+ l = lookup_wake_lock_name(buf, 0, NULL);
+ if (IS_ERR(l)) {
+ n = PTR_ERR(l);
+ goto not_found;
+ }
+
+ if (debug_mask & DEBUG_ACCESS)
+ pr_info("wake_unlock_store: %s\n", l->name);
+
+ wake_unlock(&l->wake_lock);
+not_found:
+ mutex_unlock(&tree_lock);
+ return n;
+}
+
diff --git a/stblinux-2.6.37/kernel/power/wakelock.c b/stblinux-2.6.37/kernel/power/wakelock.c
new file mode 100644
index 0000000..7833d28
--- /dev/null
+++ b/stblinux-2.6.37/kernel/power/wakelock.c
@@ -0,0 +1,598 @@
+/* kernel/power/wakelock.c
+ *
+ * Copyright (C) 2005-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/suspend.h>
+#include <linux/syscalls.h> /* sys_sync */
+#include <linux/wakelock.h>
+#ifdef CONFIG_WAKELOCK_STAT
+#include <linux/proc_fs.h>
+#endif
+#include "power.h"
+
+enum {
+ DEBUG_EXIT_SUSPEND = 1U << 0,
+ DEBUG_WAKEUP = 1U << 1,
+ DEBUG_SUSPEND = 1U << 2,
+ DEBUG_EXPIRE = 1U << 3,
+ DEBUG_WAKE_LOCK = 1U << 4,
+};
+static int debug_mask = DEBUG_EXIT_SUSPEND | DEBUG_WAKEUP;
+module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
+
+#define WAKE_LOCK_TYPE_MASK (0x0f)
+#define WAKE_LOCK_INITIALIZED (1U << 8)
+#define WAKE_LOCK_ACTIVE (1U << 9)
+#define WAKE_LOCK_AUTO_EXPIRE (1U << 10)
+#define WAKE_LOCK_PREVENTING_SUSPEND (1U << 11)
+
+static DEFINE_SPINLOCK(list_lock);
+static LIST_HEAD(inactive_locks);
+static struct list_head active_wake_locks[WAKE_LOCK_TYPE_COUNT];
+static int current_event_num;
+struct workqueue_struct *suspend_work_queue;
+struct wake_lock main_wake_lock;
+suspend_state_t requested_suspend_state = PM_SUSPEND_MEM;
+static struct wake_lock unknown_wakeup;
+
+#ifdef CONFIG_WAKELOCK_STAT
+static struct wake_lock deleted_wake_locks;
+static ktime_t last_sleep_time_update;
+static int wait_for_wakeup;
+
+int get_expired_time(struct wake_lock *lock, ktime_t *expire_time)
+{
+ struct timespec ts;
+ struct timespec kt;
+ struct timespec tomono;
+ struct timespec delta;
+ unsigned long seq;
+ long timeout;
+
+ if (!(lock->flags & WAKE_LOCK_AUTO_EXPIRE))
+ return 0;
+ do {
+ seq = read_seqbegin(&xtime_lock);
+ timeout = lock->expires - jiffies;
+ if (timeout > 0)
+ return 0;
+ kt = current_kernel_time();
+ tomono = wall_to_monotonic;
+ } while (read_seqretry(&xtime_lock, seq));
+ jiffies_to_timespec(-timeout, &delta);
+ set_normalized_timespec(&ts, kt.tv_sec + tomono.tv_sec - delta.tv_sec,
+ kt.tv_nsec + tomono.tv_nsec - delta.tv_nsec);
+ *expire_time = timespec_to_ktime(ts);
+ return 1;
+}
+
+
+static int print_lock_stat(char *buf, struct wake_lock *lock)
+{
+ int lock_count = lock->stat.count;
+ int expire_count = lock->stat.expire_count;
+ ktime_t active_time = ktime_set(0, 0);
+ ktime_t total_time = lock->stat.total_time;
+ ktime_t max_time = lock->stat.max_time;
+ ktime_t prevent_suspend_time = lock->stat.prevent_suspend_time;
+ if (lock->flags & WAKE_LOCK_ACTIVE) {
+ ktime_t now, add_time;
+ int expired = get_expired_time(lock, &now);
+ if (!expired)
+ now = ktime_get();
+ add_time = ktime_sub(now, lock->stat.last_time);
+ lock_count++;
+ if (!expired)
+ active_time = add_time;
+ else
+ expire_count++;
+ total_time = ktime_add(total_time, add_time);
+ if (lock->flags & WAKE_LOCK_PREVENTING_SUSPEND)
+ prevent_suspend_time = ktime_add(prevent_suspend_time,
+ ktime_sub(now, last_sleep_time_update));
+ if (add_time.tv64 > max_time.tv64)
+ max_time = add_time;
+ }
+
+ return sprintf(buf, "\"%s\"\t%d\t%d\t%d\t%lld\t%lld\t%lld\t%lld\t"
+ "%lld\n", lock->name, lock_count, expire_count,
+ lock->stat.wakeup_count, ktime_to_ns(active_time),
+ ktime_to_ns(total_time),
+ ktime_to_ns(prevent_suspend_time), ktime_to_ns(max_time),
+ ktime_to_ns(lock->stat.last_time));
+}
+
+
+static int wakelocks_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ unsigned long irqflags;
+ struct wake_lock *lock;
+ int len = 0;
+ char *p = page;
+ int type;
+
+ spin_lock_irqsave(&list_lock, irqflags);
+
+ p += sprintf(p, "name\tcount\texpire_count\twake_count\tactive_since"
+ "\ttotal_time\tsleep_time\tmax_time\tlast_change\n");
+ list_for_each_entry(lock, &inactive_locks, link) {
+ p += print_lock_stat(p, lock);
+ }
+ for (type = 0; type < WAKE_LOCK_TYPE_COUNT; type++) {
+ list_for_each_entry(lock, &active_wake_locks[type], link)
+ p += print_lock_stat(p, lock);
+ }
+ spin_unlock_irqrestore(&list_lock, irqflags);
+
+ *start = page + off;
+
+ len = p - page;
+ if (len > off)
+ len -= off;
+ else
+ len = 0;
+
+ return len < count ? len : count;
+}
+
+static void wake_unlock_stat_locked(struct wake_lock *lock, int expired)
+{
+ ktime_t duration;
+ ktime_t now;
+ if (!(lock->flags & WAKE_LOCK_ACTIVE))
+ return;
+ if (get_expired_time(lock, &now))
+ expired = 1;
+ else
+ now = ktime_get();
+ lock->stat.count++;
+ if (expired)
+ lock->stat.expire_count++;
+ duration = ktime_sub(now, lock->stat.last_time);
+ lock->stat.total_time = ktime_add(lock->stat.total_time, duration);
+ if (ktime_to_ns(duration) > ktime_to_ns(lock->stat.max_time))
+ lock->stat.max_time = duration;
+ lock->stat.last_time = ktime_get();
+ if (lock->flags & WAKE_LOCK_PREVENTING_SUSPEND) {
+ duration = ktime_sub(now, last_sleep_time_update);
+ lock->stat.prevent_suspend_time = ktime_add(
+ lock->stat.prevent_suspend_time, duration);
+ lock->flags &= ~WAKE_LOCK_PREVENTING_SUSPEND;
+ }
+}
+
+static void update_sleep_wait_stats_locked(int done)
+{
+ struct wake_lock *lock;
+ ktime_t now, etime, elapsed, add;
+ int expired;
+
+ now = ktime_get();
+ elapsed = ktime_sub(now, last_sleep_time_update);
+ list_for_each_entry(lock, &active_wake_locks[WAKE_LOCK_SUSPEND], link) {
+ expired = get_expired_time(lock, &etime);
+ if (lock->flags & WAKE_LOCK_PREVENTING_SUSPEND) {
+ if (expired)
+ add = ktime_sub(etime, last_sleep_time_update);
+ else
+ add = elapsed;
+ lock->stat.prevent_suspend_time = ktime_add(
+ lock->stat.prevent_suspend_time, add);
+ }
+ if (done || expired)
+ lock->flags &= ~WAKE_LOCK_PREVENTING_SUSPEND;
+ else
+ lock->flags |= WAKE_LOCK_PREVENTING_SUSPEND;
+ }
+ last_sleep_time_update = now;
+}
+#endif
+
+
+static void expire_wake_lock(struct wake_lock *lock)
+{
+#ifdef CONFIG_WAKELOCK_STAT
+ wake_unlock_stat_locked(lock, 1);
+#endif
+ lock->flags &= ~(WAKE_LOCK_ACTIVE | WAKE_LOCK_AUTO_EXPIRE);
+ list_del(&lock->link);
+ list_add(&lock->link, &inactive_locks);
+ if (debug_mask & (DEBUG_WAKE_LOCK | DEBUG_EXPIRE))
+ pr_info("expired wake lock %s\n", lock->name);
+}
+
+static void print_active_locks(int type)
+{
+ unsigned long irqflags;
+ struct wake_lock *lock;
+
+ BUG_ON(type >= WAKE_LOCK_TYPE_COUNT);
+ spin_lock_irqsave(&list_lock, irqflags);
+ list_for_each_entry(lock, &active_wake_locks[type], link) {
+ if (lock->flags & WAKE_LOCK_AUTO_EXPIRE) {
+ long timeout = lock->expires - jiffies;
+ if (timeout <= 0)
+ pr_info("wake lock %s, expired\n", lock->name);
+ else
+ pr_info("active wake lock %s, time left %ld\n",
+ lock->name, timeout);
+ } else
+ pr_info("active wake lock %s\n", lock->name);
+ }
+ spin_unlock_irqrestore(&list_lock, irqflags);
+}
+
+static long has_wake_lock_locked(int type)
+{
+ struct wake_lock *lock, *n;
+ long max_timeout = 0;
+
+ BUG_ON(type >= WAKE_LOCK_TYPE_COUNT);
+ list_for_each_entry_safe(lock, n, &active_wake_locks[type], link) {
+ if (lock->flags & WAKE_LOCK_AUTO_EXPIRE) {
+ long timeout = lock->expires - jiffies;
+ if (timeout <= 0)
+ expire_wake_lock(lock);
+ else if (timeout > max_timeout)
+ max_timeout = timeout;
+ } else
+ return -1;
+ }
+ return max_timeout;
+}
+
+long has_wake_lock(int type)
+{
+ long ret;
+ unsigned long irqflags;
+ spin_lock_irqsave(&list_lock, irqflags);
+ ret = has_wake_lock_locked(type);
+ spin_unlock_irqrestore(&list_lock, irqflags);
+ return ret;
+}
+
+static void suspend(struct work_struct *work)
+{
+ int ret;
+ int entry_event_num;
+
+ if (has_wake_lock(WAKE_LOCK_SUSPEND)) {
+ if (debug_mask & DEBUG_SUSPEND)
+ pr_info("suspend: abort suspend\n");
+ return;
+ }
+
+ entry_event_num = current_event_num;
+ sys_sync();
+ if (debug_mask & DEBUG_SUSPEND)
+ pr_info("suspend: enter suspend\n");
+ ret = pm_suspend(requested_suspend_state);
+ if (debug_mask & DEBUG_EXIT_SUSPEND) {
+ struct timespec ts;
+ struct rtc_time tm;
+ getnstimeofday(&ts);
+ rtc_time_to_tm(ts.tv_sec, &tm);
+ pr_info("suspend: exit suspend, ret = %d "
+ "(%d-%02d-%02d %02d:%02d:%02d.%09lu UTC)\n", ret,
+ tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec, ts.tv_nsec);
+ }
+ if (current_event_num == entry_event_num) {
+ if (debug_mask & DEBUG_SUSPEND)
+ pr_info("suspend: pm_suspend returned with no event\n");
+ wake_lock_timeout(&unknown_wakeup, HZ / 2);
+ }
+}
+static DECLARE_WORK(suspend_work, suspend);
+
+static void expire_wake_locks(unsigned long data)
+{
+ long has_lock;
+ unsigned long irqflags;
+ if (debug_mask & DEBUG_EXPIRE)
+ pr_info("expire_wake_locks: start\n");
+ if (debug_mask & DEBUG_SUSPEND)
+ print_active_locks(WAKE_LOCK_SUSPEND);
+ spin_lock_irqsave(&list_lock, irqflags);
+ has_lock = has_wake_lock_locked(WAKE_LOCK_SUSPEND);
+ if (debug_mask & DEBUG_EXPIRE)
+ pr_info("expire_wake_locks: done, has_lock %ld\n", has_lock);
+ if (has_lock == 0)
+ queue_work(suspend_work_queue, &suspend_work);
+ spin_unlock_irqrestore(&list_lock, irqflags);
+}
+static DEFINE_TIMER(expire_timer, expire_wake_locks, 0, 0);
+
+static int power_suspend_late(struct platform_device *pdev, pm_message_t state)
+{
+ int ret = has_wake_lock(WAKE_LOCK_SUSPEND) ? -EAGAIN : 0;
+#ifdef CONFIG_WAKELOCK_STAT
+ wait_for_wakeup = 1;
+#endif
+ if (debug_mask & DEBUG_SUSPEND)
+ pr_info("power_suspend_late return %d\n", ret);
+ return ret;
+}
+
+static struct platform_driver power_driver = {
+ .driver.name = "power",
+ .suspend_late = power_suspend_late,
+};
+static struct platform_device power_device = {
+ .name = "power",
+};
+
+void wake_lock_init(struct wake_lock *lock, int type, const char *name)
+{
+ unsigned long irqflags = 0;
+
+ if (name)
+ lock->name = name;
+ BUG_ON(!lock->name);
+
+ if (debug_mask & DEBUG_WAKE_LOCK)
+ pr_info("wake_lock_init name=%s\n", lock->name);
+#ifdef CONFIG_WAKELOCK_STAT
+ lock->stat.count = 0;
+ lock->stat.expire_count = 0;
+ lock->stat.wakeup_count = 0;
+ lock->stat.total_time = ktime_set(0, 0);
+ lock->stat.prevent_suspend_time = ktime_set(0, 0);
+ lock->stat.max_time = ktime_set(0, 0);
+ lock->stat.last_time = ktime_set(0, 0);
+#endif
+ lock->flags = (type & WAKE_LOCK_TYPE_MASK) | WAKE_LOCK_INITIALIZED;
+
+ INIT_LIST_HEAD(&lock->link);
+ spin_lock_irqsave(&list_lock, irqflags);
+ list_add(&lock->link, &inactive_locks);
+ spin_unlock_irqrestore(&list_lock, irqflags);
+}
+EXPORT_SYMBOL(wake_lock_init);
+
+void wake_lock_destroy(struct wake_lock *lock)
+{
+ unsigned long irqflags;
+ if (debug_mask & DEBUG_WAKE_LOCK)
+ pr_info("wake_lock_destroy name=%s\n", lock->name);
+ spin_lock_irqsave(&list_lock, irqflags);
+ lock->flags &= ~WAKE_LOCK_INITIALIZED;
+#ifdef CONFIG_WAKELOCK_STAT
+ if (lock->stat.count) {
+ deleted_wake_locks.stat.count += lock->stat.count;
+ deleted_wake_locks.stat.expire_count += lock->stat.expire_count;
+ deleted_wake_locks.stat.total_time =
+ ktime_add(deleted_wake_locks.stat.total_time,
+ lock->stat.total_time);
+ deleted_wake_locks.stat.prevent_suspend_time =
+ ktime_add(deleted_wake_locks.stat.prevent_suspend_time,
+ lock->stat.prevent_suspend_time);
+ deleted_wake_locks.stat.max_time =
+ ktime_add(deleted_wake_locks.stat.max_time,
+ lock->stat.max_time);
+ }
+#endif
+ list_del(&lock->link);
+ spin_unlock_irqrestore(&list_lock, irqflags);
+}
+EXPORT_SYMBOL(wake_lock_destroy);
+
+static void wake_lock_internal(
+ struct wake_lock *lock, long timeout, int has_timeout)
+{
+ int type;
+ unsigned long irqflags;
+ long expire_in;
+
+ spin_lock_irqsave(&list_lock, irqflags);
+ type = lock->flags & WAKE_LOCK_TYPE_MASK;
+ BUG_ON(type >= WAKE_LOCK_TYPE_COUNT);
+ BUG_ON(!(lock->flags & WAKE_LOCK_INITIALIZED));
+#ifdef CONFIG_WAKELOCK_STAT
+ if (type == WAKE_LOCK_SUSPEND && wait_for_wakeup) {
+ if (debug_mask & DEBUG_WAKEUP)
+ pr_info("wakeup wake lock: %s\n", lock->name);
+ wait_for_wakeup = 0;
+ lock->stat.wakeup_count++;
+ }
+ if ((lock->flags & WAKE_LOCK_AUTO_EXPIRE) &&
+ (long)(lock->expires - jiffies) <= 0) {
+ wake_unlock_stat_locked(lock, 0);
+ lock->stat.last_time = ktime_get();
+ }
+#endif
+ if (!(lock->flags & WAKE_LOCK_ACTIVE)) {
+ lock->flags |= WAKE_LOCK_ACTIVE;
+#ifdef CONFIG_WAKELOCK_STAT
+ lock->stat.last_time = ktime_get();
+#endif
+ }
+ list_del(&lock->link);
+ if (has_timeout) {
+ if (debug_mask & DEBUG_WAKE_LOCK)
+ pr_info("wake_lock: %s, type %d, timeout %ld.%03lu\n",
+ lock->name, type, timeout / HZ,
+ (timeout % HZ) * MSEC_PER_SEC / HZ);
+ lock->expires = jiffies + timeout;
+ lock->flags |= WAKE_LOCK_AUTO_EXPIRE;
+ list_add_tail(&lock->link, &active_wake_locks[type]);
+ } else {
+ if (debug_mask & DEBUG_WAKE_LOCK)
+ pr_info("wake_lock: %s, type %d\n", lock->name, type);
+ lock->expires = LONG_MAX;
+ lock->flags &= ~WAKE_LOCK_AUTO_EXPIRE;
+ list_add(&lock->link, &active_wake_locks[type]);
+ }
+ if (type == WAKE_LOCK_SUSPEND) {
+ current_event_num++;
+#ifdef CONFIG_WAKELOCK_STAT
+ if (lock == &main_wake_lock)
+ update_sleep_wait_stats_locked(1);
+ else if (!wake_lock_active(&main_wake_lock))
+ update_sleep_wait_stats_locked(0);
+#endif
+ if (has_timeout)
+ expire_in = has_wake_lock_locked(type);
+ else
+ expire_in = -1;
+ if (expire_in > 0) {
+ if (debug_mask & DEBUG_EXPIRE)
+ pr_info("wake_lock: %s, start expire timer, "
+ "%ld\n", lock->name, expire_in);
+ mod_timer(&expire_timer, jiffies + expire_in);
+ } else {
+ if (del_timer(&expire_timer))
+ if (debug_mask & DEBUG_EXPIRE)
+ pr_info("wake_lock: %s, stop expire timer\n",
+ lock->name);
+ if (expire_in == 0)
+ queue_work(suspend_work_queue, &suspend_work);
+ }
+ }
+ spin_unlock_irqrestore(&list_lock, irqflags);
+}
+
+void wake_lock(struct wake_lock *lock)
+{
+ wake_lock_internal(lock, 0, 0);
+}
+EXPORT_SYMBOL(wake_lock);
+
+void wake_lock_timeout(struct wake_lock *lock, long timeout)
+{
+ wake_lock_internal(lock, timeout, 1);
+}
+EXPORT_SYMBOL(wake_lock_timeout);
+
+void wake_unlock(struct wake_lock *lock)
+{
+ int type;
+ unsigned long irqflags;
+ spin_lock_irqsave(&list_lock, irqflags);
+ type = lock->flags & WAKE_LOCK_TYPE_MASK;
+#ifdef CONFIG_WAKELOCK_STAT
+ wake_unlock_stat_locked(lock, 0);
+#endif
+ if (debug_mask & DEBUG_WAKE_LOCK)
+ pr_info("wake_unlock: %s\n", lock->name);
+ lock->flags &= ~(WAKE_LOCK_ACTIVE | WAKE_LOCK_AUTO_EXPIRE);
+ list_del(&lock->link);
+ list_add(&lock->link, &inactive_locks);
+ if (type == WAKE_LOCK_SUSPEND) {
+ long has_lock = has_wake_lock_locked(type);
+ if (has_lock > 0) {
+ if (debug_mask & DEBUG_EXPIRE)
+ pr_info("wake_unlock: %s, start expire timer, "
+ "%ld\n", lock->name, has_lock);
+ mod_timer(&expire_timer, jiffies + has_lock);
+ } else {
+ if (del_timer(&expire_timer))
+ if (debug_mask & DEBUG_EXPIRE)
+ pr_info("wake_unlock: %s, stop expire "
+ "timer\n", lock->name);
+ if (has_lock == 0)
+ queue_work(suspend_work_queue, &suspend_work);
+ }
+ if (lock == &main_wake_lock) {
+ if (debug_mask & DEBUG_SUSPEND)
+ print_active_locks(WAKE_LOCK_SUSPEND);
+#ifdef CONFIG_WAKELOCK_STAT
+ update_sleep_wait_stats_locked(0);
+#endif
+ }
+ }
+ spin_unlock_irqrestore(&list_lock, irqflags);
+}
+EXPORT_SYMBOL(wake_unlock);
+
+int wake_lock_active(struct wake_lock *lock)
+{
+ return !!(lock->flags & WAKE_LOCK_ACTIVE);
+}
+EXPORT_SYMBOL(wake_lock_active);
+
+static int __init wakelocks_init(void)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(active_wake_locks); i++)
+ INIT_LIST_HEAD(&active_wake_locks[i]);
+
+#ifdef CONFIG_WAKELOCK_STAT
+ wake_lock_init(&deleted_wake_locks, WAKE_LOCK_SUSPEND,
+ "deleted_wake_locks");
+#endif
+ wake_lock_init(&main_wake_lock, WAKE_LOCK_SUSPEND, "main");
+ wake_lock(&main_wake_lock);
+ wake_lock_init(&unknown_wakeup, WAKE_LOCK_SUSPEND, "unknown_wakeups");
+
+ ret = platform_device_register(&power_device);
+ if (ret) {
+ pr_err("wakelocks_init: platform_device_register failed\n");
+ goto err_platform_device_register;
+ }
+ ret = platform_driver_register(&power_driver);
+ if (ret) {
+ pr_err("wakelocks_init: platform_driver_register failed\n");
+ goto err_platform_driver_register;
+ }
+
+ suspend_work_queue = create_singlethread_workqueue("suspend");
+ if (suspend_work_queue == NULL) {
+ ret = -ENOMEM;
+ goto err_suspend_work_queue;
+ }
+
+#ifdef CONFIG_WAKELOCK_STAT
+ create_proc_read_entry("wakelocks", S_IRUGO, NULL,
+ wakelocks_read_proc, NULL);
+#endif
+
+ return 0;
+
+err_suspend_work_queue:
+ platform_driver_unregister(&power_driver);
+err_platform_driver_register:
+ platform_device_unregister(&power_device);
+err_platform_device_register:
+ wake_lock_destroy(&unknown_wakeup);
+ wake_lock_destroy(&main_wake_lock);
+#ifdef CONFIG_WAKELOCK_STAT
+ wake_lock_destroy(&deleted_wake_locks);
+#endif
+ return ret;
+}
+
+static void __exit wakelocks_exit(void)
+{
+#ifdef CONFIG_WAKELOCK_STAT
+ remove_proc_entry("wakelocks", NULL);
+#endif
+ destroy_workqueue(suspend_work_queue);
+ platform_driver_unregister(&power_driver);
+ platform_device_unregister(&power_device);
+ wake_lock_destroy(&unknown_wakeup);
+ wake_lock_destroy(&main_wake_lock);
+#ifdef CONFIG_WAKELOCK_STAT
+ wake_lock_destroy(&deleted_wake_locks);
+#endif
+}
+
+core_initcall(wakelocks_init);
+module_exit(wakelocks_exit);
diff --git a/stblinux-2.6.37/mm/Makefile b/stblinux-2.6.37/mm/Makefile
index f73f75a..cfa5e9a 100644
--- a/stblinux-2.6.37/mm/Makefile
+++ b/stblinux-2.6.37/mm/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_HUGETLBFS) += hugetlb.o
obj-$(CONFIG_NUMA) += mempolicy.o
obj-$(CONFIG_SPARSEMEM) += sparse.o
obj-$(CONFIG_SPARSEMEM_VMEMMAP) += sparse-vmemmap.o
+obj-$(CONFIG_ASHMEM) += ashmem.o
obj-$(CONFIG_SLOB) += slob.o
obj-$(CONFIG_COMPACTION) += compaction.o
obj-$(CONFIG_MMU_NOTIFIER) += mmu_notifier.o
diff --git a/stblinux-2.6.37/mm/ashmem.c b/stblinux-2.6.37/mm/ashmem.c
new file mode 100644
index 0000000..493c7ca
--- /dev/null
+++ b/stblinux-2.6.37/mm/ashmem.c
@@ -0,0 +1,669 @@
+/* mm/ashmem.c
+**
+** Anonymous Shared Memory Subsystem, ashmem
+**
+** Copyright (C) 2008 Google, Inc.
+**
+** Robert Love <rlove@google.com>
+**
+** This software is licensed under the terms of the GNU General Public
+** License version 2, as published by the Free Software Foundation, and
+** may be copied, distributed, and modified under those terms.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+*/
+
+#include <linux/module.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/security.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/uaccess.h>
+#include <linux/personality.h>
+#include <linux/bitops.h>
+#include <linux/mutex.h>
+#include <linux/shmem_fs.h>
+#include <linux/ashmem.h>
+
+#define ASHMEM_NAME_PREFIX "dev/ashmem/"
+#define ASHMEM_NAME_PREFIX_LEN (sizeof(ASHMEM_NAME_PREFIX) - 1)
+#define ASHMEM_FULL_NAME_LEN (ASHMEM_NAME_LEN + ASHMEM_NAME_PREFIX_LEN)
+
+/*
+ * ashmem_area - anonymous shared memory area
+ * Lifecycle: From our parent file's open() until its release()
+ * Locking: Protected by `ashmem_mutex'
+ * Big Note: Mappings do NOT pin this structure; it dies on close()
+ */
+struct ashmem_area {
+ char name[ASHMEM_FULL_NAME_LEN];/* optional name for /proc/pid/maps */
+ struct list_head unpinned_list; /* list of all ashmem areas */
+ struct file *file; /* the shmem-based backing file */
+ size_t size; /* size of the mapping, in bytes */
+ unsigned long prot_mask; /* allowed prot bits, as vm_flags */
+};
+
+/*
+ * ashmem_range - represents an interval of unpinned (evictable) pages
+ * Lifecycle: From unpin to pin
+ * Locking: Protected by `ashmem_mutex'
+ */
+struct ashmem_range {
+ struct list_head lru; /* entry in LRU list */
+ struct list_head unpinned; /* entry in its area's unpinned list */
+ struct ashmem_area *asma; /* associated area */
+ size_t pgstart; /* starting page, inclusive */
+ size_t pgend; /* ending page, inclusive */
+ unsigned int purged; /* ASHMEM_NOT or ASHMEM_WAS_PURGED */
+};
+
+/* LRU list of unpinned pages, protected by ashmem_mutex */
+static LIST_HEAD(ashmem_lru_list);
+
+/* Count of pages on our LRU list, protected by ashmem_mutex */
+static unsigned long lru_count;
+
+/*
+ * ashmem_mutex - protects the list of and each individual ashmem_area
+ *
+ * Lock Ordering: ashmex_mutex -> i_mutex -> i_alloc_sem
+ */
+static DEFINE_MUTEX(ashmem_mutex);
+
+static struct kmem_cache *ashmem_area_cachep __read_mostly;
+static struct kmem_cache *ashmem_range_cachep __read_mostly;
+
+#define range_size(range) \
+ ((range)->pgend - (range)->pgstart + 1)
+
+#define range_on_lru(range) \
+ ((range)->purged == ASHMEM_NOT_PURGED)
+
+#define page_range_subsumes_range(range, start, end) \
+ (((range)->pgstart >= (start)) && ((range)->pgend <= (end)))
+
+#define page_range_subsumed_by_range(range, start, end) \
+ (((range)->pgstart <= (start)) && ((range)->pgend >= (end)))
+
+#define page_in_range(range, page) \
+ (((range)->pgstart <= (page)) && ((range)->pgend >= (page)))
+
+#define page_range_in_range(range, start, end) \
+ (page_in_range(range, start) || page_in_range(range, end) || \
+ page_range_subsumes_range(range, start, end))
+
+#define range_before_page(range, page) \
+ ((range)->pgend < (page))
+
+#define PROT_MASK (PROT_EXEC | PROT_READ | PROT_WRITE)
+
+static inline void lru_add(struct ashmem_range *range)
+{
+ list_add_tail(&range->lru, &ashmem_lru_list);
+ lru_count += range_size(range);
+}
+
+static inline void lru_del(struct ashmem_range *range)
+{
+ list_del(&range->lru);
+ lru_count -= range_size(range);
+}
+
+/*
+ * range_alloc - allocate and initialize a new ashmem_range structure
+ *
+ * 'asma' - associated ashmem_area
+ * 'prev_range' - the previous ashmem_range in the sorted asma->unpinned list
+ * 'purged' - initial purge value (ASMEM_NOT_PURGED or ASHMEM_WAS_PURGED)
+ * 'start' - starting page, inclusive
+ * 'end' - ending page, inclusive
+ *
+ * Caller must hold ashmem_mutex.
+ */
+static int range_alloc(struct ashmem_area *asma,
+ struct ashmem_range *prev_range, unsigned int purged,
+ size_t start, size_t end)
+{
+ struct ashmem_range *range;
+ range = kmem_cache_zalloc(ashmem_range_cachep, GFP_KERNEL);
+ if (unlikely(!range))
+ return -ENOMEM;
+
+ range->asma = asma;
+ range->pgstart = start;
+ range->pgend = end;
+ range->purged = purged;
+
+ list_add_tail(&range->unpinned, &prev_range->unpinned);
+
+ if (range_on_lru(range))
+ lru_add(range);
+
+ return 0;
+}
+
+static void range_del(struct ashmem_range *range)
+{
+ list_del(&range->unpinned);
+ if (range_on_lru(range))
+ lru_del(range);
+ kmem_cache_free(ashmem_range_cachep, range);
+}
+
+/*
+ * range_shrink - shrinks a range
+ *
+ * Caller must hold ashmem_mutex.
+ */
+static inline void range_shrink(struct ashmem_range *range,
+ size_t start, size_t end)
+{
+ size_t pre = range_size(range);
+
+ range->pgstart = start;
+ range->pgend = end;
+
+ if (range_on_lru(range))
+ lru_count -= pre - range_size(range);
+}
+
+static int ashmem_open(struct inode *inode, struct file *file)
+{
+ struct ashmem_area *asma;
+ int ret;
+
+ ret = nonseekable_open(inode, file);
+ if (unlikely(ret))
+ return ret;
+
+ asma = kmem_cache_zalloc(ashmem_area_cachep, GFP_KERNEL);
+ if (unlikely(!asma))
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&asma->unpinned_list);
+ memcpy(asma->name, ASHMEM_NAME_PREFIX, ASHMEM_NAME_PREFIX_LEN);
+ asma->prot_mask = PROT_MASK;
+ file->private_data = asma;
+
+ return 0;
+}
+
+static int ashmem_release(struct inode *ignored, struct file *file)
+{
+ struct ashmem_area *asma = file->private_data;
+ struct ashmem_range *range, *next;
+
+ mutex_lock(&ashmem_mutex);
+ list_for_each_entry_safe(range, next, &asma->unpinned_list, unpinned)
+ range_del(range);
+ mutex_unlock(&ashmem_mutex);
+
+ if (asma->file)
+ fput(asma->file);
+ kmem_cache_free(ashmem_area_cachep, asma);
+
+ return 0;
+}
+
+static int ashmem_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct ashmem_area *asma = file->private_data;
+ int ret = 0;
+
+ mutex_lock(&ashmem_mutex);
+
+ /* user needs to SET_SIZE before mapping */
+ if (unlikely(!asma->size)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* requested protection bits must match our allowed protection mask */
+ if (unlikely((vma->vm_flags & ~asma->prot_mask) & PROT_MASK)) {
+ ret = -EPERM;
+ goto out;
+ }
+
+ if (!asma->file) {
+ char *name = ASHMEM_NAME_DEF;
+ struct file *vmfile;
+
+ if (asma->name[ASHMEM_NAME_PREFIX_LEN] != '\0')
+ name = asma->name;
+
+ /* ... and allocate the backing shmem file */
+ vmfile = shmem_file_setup(name, asma->size, vma->vm_flags);
+ if (unlikely(IS_ERR(vmfile))) {
+ ret = PTR_ERR(vmfile);
+ goto out;
+ }
+ asma->file = vmfile;
+ }
+ get_file(asma->file);
+
+ if (vma->vm_flags & VM_SHARED)
+ shmem_set_file(vma, asma->file);
+ else {
+ if (vma->vm_file)
+ fput(vma->vm_file);
+ vma->vm_file = asma->file;
+ }
+ vma->vm_flags |= VM_CAN_NONLINEAR;
+
+out:
+ mutex_unlock(&ashmem_mutex);
+ return ret;
+}
+
+/*
+ * ashmem_shrink - our cache shrinker, called from mm/vmscan.c :: shrink_slab
+ *
+ * 'nr_to_scan' is the number of objects (pages) to prune, or 0 to query how
+ * many objects (pages) we have in total.
+ *
+ * 'gfp_mask' is the mask of the allocation that got us into this mess.
+ *
+ * Return value is the number of objects (pages) remaining, or -1 if we cannot
+ * proceed without risk of deadlock (due to gfp_mask).
+ *
+ * We approximate LRU via least-recently-unpinned, jettisoning unpinned partial
+ * chunks of ashmem regions LRU-wise one-at-a-time until we hit 'nr_to_scan'
+ * pages freed.
+ */
+static int ashmem_shrink(struct shrinker *pshrinker, int nr_to_scan, gfp_t gfp_mask)
+{
+ struct ashmem_range *range, *next;
+
+ /* We might recurse into filesystem code, so bail out if necessary */
+ if (nr_to_scan && !(gfp_mask & __GFP_FS))
+ return -1;
+ if (!nr_to_scan)
+ return lru_count;
+
+ mutex_lock(&ashmem_mutex);
+ list_for_each_entry_safe(range, next, &ashmem_lru_list, lru) {
+ struct inode *inode = range->asma->file->f_dentry->d_inode;
+ loff_t start = range->pgstart * PAGE_SIZE;
+ loff_t end = (range->pgend + 1) * PAGE_SIZE - 1;
+
+ vmtruncate_range(inode, start, end);
+ range->purged = ASHMEM_WAS_PURGED;
+ lru_del(range);
+
+ nr_to_scan -= range_size(range);
+ if (nr_to_scan <= 0)
+ break;
+ }
+ mutex_unlock(&ashmem_mutex);
+
+ return lru_count;
+}
+
+static struct shrinker ashmem_shrinker = {
+ .shrink = ashmem_shrink,
+ .seeks = DEFAULT_SEEKS * 4,
+};
+
+static int set_prot_mask(struct ashmem_area *asma, unsigned long prot)
+{
+ int ret = 0;
+
+ mutex_lock(&ashmem_mutex);
+
+ /* the user can only remove, not add, protection bits */
+ if (unlikely((asma->prot_mask & prot) != prot)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* does the application expect PROT_READ to imply PROT_EXEC? */
+ if ((prot & PROT_READ) && (current->personality & READ_IMPLIES_EXEC))
+ prot |= PROT_EXEC;
+
+ asma->prot_mask = prot;
+
+out:
+ mutex_unlock(&ashmem_mutex);
+ return ret;
+}
+
+static int set_name(struct ashmem_area *asma, void __user *name)
+{
+ int ret = 0;
+
+ mutex_lock(&ashmem_mutex);
+
+ /* cannot change an existing mapping's name */
+ if (unlikely(asma->file)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (unlikely(copy_from_user(asma->name + ASHMEM_NAME_PREFIX_LEN,
+ name, ASHMEM_NAME_LEN)))
+ ret = -EFAULT;
+ asma->name[ASHMEM_FULL_NAME_LEN-1] = '\0';
+
+out:
+ mutex_unlock(&ashmem_mutex);
+
+ return ret;
+}
+
+static int get_name(struct ashmem_area *asma, void __user *name)
+{
+ int ret = 0;
+
+ mutex_lock(&ashmem_mutex);
+ if (asma->name[ASHMEM_NAME_PREFIX_LEN] != '\0') {
+ size_t len;
+
+ /*
+ * Copying only `len', instead of ASHMEM_NAME_LEN, bytes
+ * prevents us from revealing one user's stack to another.
+ */
+ len = strlen(asma->name + ASHMEM_NAME_PREFIX_LEN) + 1;
+ if (unlikely(copy_to_user(name,
+ asma->name + ASHMEM_NAME_PREFIX_LEN, len)))
+ ret = -EFAULT;
+ } else {
+ if (unlikely(copy_to_user(name, ASHMEM_NAME_DEF,
+ sizeof(ASHMEM_NAME_DEF))))
+ ret = -EFAULT;
+ }
+ mutex_unlock(&ashmem_mutex);
+
+ return ret;
+}
+
+/*
+ * ashmem_pin - pin the given ashmem region, returning whether it was
+ * previously purged (ASHMEM_WAS_PURGED) or not (ASHMEM_NOT_PURGED).
+ *
+ * Caller must hold ashmem_mutex.
+ */
+static int ashmem_pin(struct ashmem_area *asma, size_t pgstart, size_t pgend)
+{
+ struct ashmem_range *range, *next;
+ int ret = ASHMEM_NOT_PURGED;
+
+ list_for_each_entry_safe(range, next, &asma->unpinned_list, unpinned) {
+ /* moved past last applicable page; we can short circuit */
+ if (range_before_page(range, pgstart))
+ break;
+
+ /*
+ * The user can ask us to pin pages that span multiple ranges,
+ * or to pin pages that aren't even unpinned, so this is messy.
+ *
+ * Four cases:
+ * 1. The requested range subsumes an existing range, so we
+ * just remove the entire matching range.
+ * 2. The requested range overlaps the start of an existing
+ * range, so we just update that range.
+ * 3. The requested range overlaps the end of an existing
+ * range, so we just update that range.
+ * 4. The requested range punches a hole in an existing range,
+ * so we have to update one side of the range and then
+ * create a new range for the other side.
+ */
+ if (page_range_in_range(range, pgstart, pgend)) {
+ ret |= range->purged;
+
+ /* Case #1: Easy. Just nuke the whole thing. */
+ if (page_range_subsumes_range(range, pgstart, pgend)) {
+ range_del(range);
+ continue;
+ }
+
+ /* Case #2: We overlap from the start, so adjust it */
+ if (range->pgstart >= pgstart) {
+ range_shrink(range, pgend + 1, range->pgend);
+ continue;
+ }
+
+ /* Case #3: We overlap from the rear, so adjust it */
+ if (range->pgend <= pgend) {
+ range_shrink(range, range->pgstart, pgstart-1);
+ continue;
+ }
+
+ /*
+ * Case #4: We eat a chunk out of the middle. A bit
+ * more complicated, we allocate a new range for the
+ * second half and adjust the first chunk's endpoint.
+ */
+ range_alloc(asma, range, range->purged,
+ pgend + 1, range->pgend);
+ range_shrink(range, range->pgstart, pgstart - 1);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * ashmem_unpin - unpin the given range of pages. Returns zero on success.
+ *
+ * Caller must hold ashmem_mutex.
+ */
+static int ashmem_unpin(struct ashmem_area *asma, size_t pgstart, size_t pgend)
+{
+ struct ashmem_range *range, *next;
+ unsigned int purged = ASHMEM_NOT_PURGED;
+
+restart:
+ list_for_each_entry_safe(range, next, &asma->unpinned_list, unpinned) {
+ /* short circuit: this is our insertion point */
+ if (range_before_page(range, pgstart))
+ break;
+
+ /*
+ * The user can ask us to unpin pages that are already entirely
+ * or partially pinned. We handle those two cases here.
+ */
+ if (page_range_subsumed_by_range(range, pgstart, pgend))
+ return 0;
+ if (page_range_in_range(range, pgstart, pgend)) {
+ pgstart = min_t(size_t, range->pgstart, pgstart),
+ pgend = max_t(size_t, range->pgend, pgend);
+ purged |= range->purged;
+ range_del(range);
+ goto restart;
+ }
+ }
+
+ return range_alloc(asma, range, purged, pgstart, pgend);
+}
+
+/*
+ * ashmem_get_pin_status - Returns ASHMEM_IS_UNPINNED if _any_ pages in the
+ * given interval are unpinned and ASHMEM_IS_PINNED otherwise.
+ *
+ * Caller must hold ashmem_mutex.
+ */
+static int ashmem_get_pin_status(struct ashmem_area *asma, size_t pgstart,
+ size_t pgend)
+{
+ struct ashmem_range *range;
+ int ret = ASHMEM_IS_PINNED;
+
+ list_for_each_entry(range, &asma->unpinned_list, unpinned) {
+ if (range_before_page(range, pgstart))
+ break;
+ if (page_range_in_range(range, pgstart, pgend)) {
+ ret = ASHMEM_IS_UNPINNED;
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static int ashmem_pin_unpin(struct ashmem_area *asma, unsigned long cmd,
+ void __user *p)
+{
+ struct ashmem_pin pin;
+ size_t pgstart, pgend;
+ int ret = -EINVAL;
+
+ if (unlikely(!asma->file))
+ return -EINVAL;
+
+ if (unlikely(copy_from_user(&pin, p, sizeof(pin))))
+ return -EFAULT;
+
+ /* per custom, you can pass zero for len to mean "everything onward" */
+ if (!pin.len)
+ pin.len = PAGE_ALIGN(asma->size) - pin.offset;
+
+ if (unlikely((pin.offset | pin.len) & ~PAGE_MASK))
+ return -EINVAL;
+
+ if (unlikely(((__u32) -1) - pin.offset < pin.len))
+ return -EINVAL;
+
+ if (unlikely(PAGE_ALIGN(asma->size) < pin.offset + pin.len))
+ return -EINVAL;
+
+ pgstart = pin.offset / PAGE_SIZE;
+ pgend = pgstart + (pin.len / PAGE_SIZE) - 1;
+
+ mutex_lock(&ashmem_mutex);
+
+ switch (cmd) {
+ case ASHMEM_PIN:
+ ret = ashmem_pin(asma, pgstart, pgend);
+ break;
+ case ASHMEM_UNPIN:
+ ret = ashmem_unpin(asma, pgstart, pgend);
+ break;
+ case ASHMEM_GET_PIN_STATUS:
+ ret = ashmem_get_pin_status(asma, pgstart, pgend);
+ break;
+ }
+
+ mutex_unlock(&ashmem_mutex);
+
+ return ret;
+}
+
+static long ashmem_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct ashmem_area *asma = file->private_data;
+ long ret = -ENOTTY;
+
+ switch (cmd) {
+ case ASHMEM_SET_NAME:
+ ret = set_name(asma, (void __user *) arg);
+ break;
+ case ASHMEM_GET_NAME:
+ ret = get_name(asma, (void __user *) arg);
+ break;
+ case ASHMEM_SET_SIZE:
+ ret = -EINVAL;
+ if (!asma->file) {
+ ret = 0;
+ asma->size = (size_t) arg;
+ }
+ break;
+ case ASHMEM_GET_SIZE:
+ ret = asma->size;
+ break;
+ case ASHMEM_SET_PROT_MASK:
+ ret = set_prot_mask(asma, arg);
+ break;
+ case ASHMEM_GET_PROT_MASK:
+ ret = asma->prot_mask;
+ break;
+ case ASHMEM_PIN:
+ case ASHMEM_UNPIN:
+ case ASHMEM_GET_PIN_STATUS:
+ ret = ashmem_pin_unpin(asma, cmd, (void __user *) arg);
+ break;
+ case ASHMEM_PURGE_ALL_CACHES:
+ ret = -EPERM;
+ if (capable(CAP_SYS_ADMIN)) {
+ ret = ashmem_shrink(&ashmem_shrinker, 0, GFP_KERNEL);
+ ashmem_shrink(&ashmem_shrinker, ret, GFP_KERNEL);
+ }
+ break;
+ }
+
+ return ret;
+}
+
+static struct file_operations ashmem_fops = {
+ .owner = THIS_MODULE,
+ .open = ashmem_open,
+ .release = ashmem_release,
+ .mmap = ashmem_mmap,
+ .unlocked_ioctl = ashmem_ioctl,
+ .compat_ioctl = ashmem_ioctl,
+};
+
+static struct miscdevice ashmem_misc = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "ashmem",
+ .fops = &ashmem_fops,
+};
+
+static int __init ashmem_init(void)
+{
+ int ret;
+
+ ashmem_area_cachep = kmem_cache_create("ashmem_area_cache",
+ sizeof(struct ashmem_area),
+ 0, 0, NULL);
+ if (unlikely(!ashmem_area_cachep)) {
+ printk(KERN_ERR "ashmem: failed to create slab cache\n");
+ return -ENOMEM;
+ }
+
+ ashmem_range_cachep = kmem_cache_create("ashmem_range_cache",
+ sizeof(struct ashmem_range),
+ 0, 0, NULL);
+ if (unlikely(!ashmem_range_cachep)) {
+ printk(KERN_ERR "ashmem: failed to create slab cache\n");
+ return -ENOMEM;
+ }
+
+ ret = misc_register(&ashmem_misc);
+ if (unlikely(ret)) {
+ printk(KERN_ERR "ashmem: failed to register misc device!\n");
+ return ret;
+ }
+
+ register_shrinker(&ashmem_shrinker);
+
+ printk(KERN_INFO "ashmem: initialized\n");
+
+ return 0;
+}
+
+static void __exit ashmem_exit(void)
+{
+ int ret;
+
+ unregister_shrinker(&ashmem_shrinker);
+
+ ret = misc_deregister(&ashmem_misc);
+ if (unlikely(ret))
+ printk(KERN_ERR "ashmem: failed to unregister misc device!\n");
+
+ kmem_cache_destroy(ashmem_range_cachep);
+ kmem_cache_destroy(ashmem_area_cachep);
+
+ printk(KERN_INFO "ashmem: unloaded\n");
+}
+
+module_init(ashmem_init);
+module_exit(ashmem_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/stblinux-2.6.37/mm/shmem.c b/stblinux-2.6.37/mm/shmem.c
index 47fdeeb..76ebb45 100644
--- a/stblinux-2.6.37/mm/shmem.c
+++ b/stblinux-2.6.37/mm/shmem.c
@@ -2767,6 +2767,14 @@ put_memory:
}
EXPORT_SYMBOL_GPL(shmem_file_setup);
+void shmem_set_file(struct vm_area_struct *vma, struct file *file)
+{
+ if (vma->vm_file)
+ fput(vma->vm_file);
+ vma->vm_file = file;
+ vma->vm_ops = &shmem_vm_ops;
+}
+
/**
* shmem_zero_setup - setup a shared anonymous mapping
* @vma: the vma to be mmapped is prepared by do_mmap_pgoff
diff --git a/stblinux-2.6.37/net/ipv4/sysfs_net_ipv4.c b/stblinux-2.6.37/net/ipv4/sysfs_net_ipv4.c
new file mode 100644
index 0000000..0cbbf10
--- /dev/null
+++ b/stblinux-2.6.37/net/ipv4/sysfs_net_ipv4.c
@@ -0,0 +1,88 @@
+/*
+ * net/ipv4/sysfs_net_ipv4.c
+ *
+ * sysfs-based networking knobs (so we can, unlike with sysctl, control perms)
+ *
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * Robert Love <rlove@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kobject.h>
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/init.h>
+#include <net/tcp.h>
+
+#define CREATE_IPV4_FILE(_name, _var) \
+static ssize_t _name##_show(struct kobject *kobj, \
+ struct kobj_attribute *attr, char *buf) \
+{ \
+ return sprintf(buf, "%d\n", _var); \
+} \
+static ssize_t _name##_store(struct kobject *kobj, \
+ struct kobj_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ int val, ret; \
+ ret = sscanf(buf, "%d", &val); \
+ if (ret != 1) \
+ return -EINVAL; \
+ if (val < 0) \
+ return -EINVAL; \
+ _var = val; \
+ return count; \
+} \
+static struct kobj_attribute _name##_attr = \
+ __ATTR(_name, 0644, _name##_show, _name##_store)
+
+CREATE_IPV4_FILE(tcp_wmem_min, sysctl_tcp_wmem[0]);
+CREATE_IPV4_FILE(tcp_wmem_def, sysctl_tcp_wmem[1]);
+CREATE_IPV4_FILE(tcp_wmem_max, sysctl_tcp_wmem[2]);
+
+CREATE_IPV4_FILE(tcp_rmem_min, sysctl_tcp_rmem[0]);
+CREATE_IPV4_FILE(tcp_rmem_def, sysctl_tcp_rmem[1]);
+CREATE_IPV4_FILE(tcp_rmem_max, sysctl_tcp_rmem[2]);
+
+static struct attribute *ipv4_attrs[] = {
+ &tcp_wmem_min_attr.attr,
+ &tcp_wmem_def_attr.attr,
+ &tcp_wmem_max_attr.attr,
+ &tcp_rmem_min_attr.attr,
+ &tcp_rmem_def_attr.attr,
+ &tcp_rmem_max_attr.attr,
+ NULL
+};
+
+static struct attribute_group ipv4_attr_group = {
+ .attrs = ipv4_attrs,
+};
+
+static __init int sysfs_ipv4_init(void)
+{
+ struct kobject *ipv4_kobject;
+ int ret;
+
+ ipv4_kobject = kobject_create_and_add("ipv4", kernel_kobj);
+ if (!ipv4_kobject)
+ return -ENOMEM;
+
+ ret = sysfs_create_group(ipv4_kobject, &ipv4_attr_group);
+ if (ret) {
+ kobject_put(ipv4_kobject);
+ return ret;
+ }
+
+ return 0;
+}
+
+subsys_initcall(sysfs_ipv4_init);