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| ******************************************************************************/ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/capability.h> |
| #include <linux/kernel.h> |
| #include <linux/platform_device.h> |
| #include <linux/netdevice.h> |
| |
| #include "tpm_common.h" |
| #include "tpm_header.h" |
| |
| static ssize_t tpm_sysfs_trace_help(char *buf) |
| { |
| int off = 0; |
| #ifdef CONFIG_MV_TPM_SYSFS_HELP |
| off += sprintf(buf + off, "cat help - show this help\n"); |
| off += sprintf(buf + off, "cat trace - show TPM Trace configuration\n"); |
| off += sprintf(buf + off, |
| "echo level > trace_level - " |
| "Set TPM Global Trace level (0-none, 1-debug, 2-info, 3-warn, 4-err, 5-fatal)\n"); |
| off += sprintf(buf + off, |
| "echo mod en > trace_module - Trace en/dis TPM module" |
| "(0-db, 1-pnc_logic, 2-init, 5-proc_logic, 6-cli, 7-pnc_hw, 9-mod)\n"); |
| #else |
| printk(KERN_WARNING "%s: sysfs help is not compiled (CONFIG_MV_TPM_SYSFS_HELP)\n", __func__); |
| #endif |
| return off; |
| } |
| |
| static ssize_t tpm_sysfs_trace_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| int off = 0; |
| const char *name = attr->attr.name; |
| |
| if (!capable(CAP_NET_ADMIN)) |
| return -EPERM; |
| |
| if (!strcmp(name, "trace")) |
| off = tpm_trace_status_print(); |
| else |
| off = tpm_sysfs_trace_help(buf); |
| |
| return off; |
| } |
| |
| static ssize_t tpm_sysfs_trace_1_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) |
| { |
| const char *name = attr->attr.name; |
| unsigned int v; |
| /*unsigned long flags;*/ |
| |
| if (!capable(CAP_NET_ADMIN)) |
| return -EPERM; |
| |
| /* Read input */ |
| v = 0; |
| |
| sscanf(buf, "%x", &v); |
| |
| /*raw_local_irq_save(flags);*/ |
| |
| if (!strcmp(name, "trace_level")) |
| tpm_trace_set(v); |
| else |
| printk(KERN_INFO "%s: illegal operation <%s>\n", __func__, attr->attr.name); |
| |
| /*raw_local_irq_restore(flags);*/ |
| |
| return len; |
| } |
| |
| static ssize_t tpm_sysfs_trace_2_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) |
| { |
| const char *name = attr->attr.name; |
| unsigned int p, v; |
| /*unsigned long flags;*/ |
| |
| if (!capable(CAP_NET_ADMIN)) |
| return -EPERM; |
| |
| /* Read input */ |
| v = 0; |
| sscanf(buf, "%d %x", &p, &v); |
| |
| /*raw_local_irq_save(flags);*/ |
| |
| if (!strcmp(name, "trace_module")) |
| tpm_trace_module_set(p, v); |
| else |
| printk(KERN_INFO "%s: illegal operation <%s>\n", __func__, attr->attr.name); |
| |
| /*raw_local_irq_restore(flags);*/ |
| |
| return len; |
| } |
| |
| static DEVICE_ATTR(trace_level, S_IWUSR, tpm_sysfs_trace_show, tpm_sysfs_trace_1_store); |
| static DEVICE_ATTR(trace_module, S_IWUSR, tpm_sysfs_trace_show, tpm_sysfs_trace_2_store); |
| static DEVICE_ATTR(trace, S_IRUSR, tpm_sysfs_trace_show, NULL); |
| #ifdef CONFIG_MV_TPM_SYSFS_HELP |
| static DEVICE_ATTR(help, S_IRUSR, tpm_sysfs_trace_show, NULL); |
| #endif |
| static struct attribute *tpm_trace_attrs[] = { |
| &dev_attr_trace_level.attr, |
| &dev_attr_trace_module.attr, |
| &dev_attr_trace.attr, |
| #ifdef CONFIG_MV_TPM_SYSFS_HELP |
| &dev_attr_help.attr, |
| #endif |
| NULL |
| }; |
| |
| static struct attribute_group tpm_trace_group = { |
| .name = "trace", |
| .attrs = tpm_trace_attrs, |
| }; |
| |
| int tpm_sysfs_trace_init(void) |
| { |
| int err; |
| struct device *pd; |
| |
| pd = bus_find_device_by_name(&platform_bus_type, NULL, "tpm"); |
| if (!pd) { |
| platform_device_register_simple("tpm", -1, NULL, 0); |
| pd = bus_find_device_by_name(&platform_bus_type, NULL, "tpm"); |
| } |
| |
| if (!pd) { |
| printk(KERN_ERR "%s: cannot find tpm device\n", __func__); |
| pd = &platform_bus; |
| } |
| |
| err = sysfs_create_group(&pd->kobj, &tpm_trace_group); |
| if (err) { |
| printk(KERN_INFO "sysfs group failed %d\n", err); |
| goto out; |
| } |
| out: |
| return err; |
| } |
| |
| /*module_init(xxx); */ |
| |
| MODULE_AUTHOR("Yuval Caduri"); |
| MODULE_DESCRIPTION("sysfs for TPM Trace"); |
| MODULE_LICENSE("GPL"); |