| /* |
| * zcrypt 2.1.0 |
| * |
| * Copyright IBM Corp. 2001, 2012 |
| * Author(s): Robert Burroughs |
| * Eric Rossman (edrossma@us.ibm.com) |
| * Cornelia Huck <cornelia.huck@de.ibm.com> |
| * |
| * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com) |
| * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com> |
| * Ralph Wuerthner <rwuerthn@de.ibm.com> |
| * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com> |
| * |
| * 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/miscdevice.h> |
| #include <linux/fs.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <linux/compat.h> |
| #include <linux/slab.h> |
| #include <linux/atomic.h> |
| #include <asm/uaccess.h> |
| #include <linux/hw_random.h> |
| #include <linux/debugfs.h> |
| #include <asm/debug.h> |
| |
| #include "zcrypt_debug.h" |
| #include "zcrypt_api.h" |
| |
| #include "zcrypt_msgtype6.h" |
| |
| /* |
| * Module description. |
| */ |
| MODULE_AUTHOR("IBM Corporation"); |
| MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \ |
| "Copyright IBM Corp. 2001, 2012"); |
| MODULE_LICENSE("GPL"); |
| |
| static DEFINE_SPINLOCK(zcrypt_device_lock); |
| static LIST_HEAD(zcrypt_device_list); |
| static int zcrypt_device_count = 0; |
| static atomic_t zcrypt_open_count = ATOMIC_INIT(0); |
| static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0); |
| |
| atomic_t zcrypt_rescan_req = ATOMIC_INIT(0); |
| EXPORT_SYMBOL(zcrypt_rescan_req); |
| |
| static int zcrypt_rng_device_add(void); |
| static void zcrypt_rng_device_remove(void); |
| |
| static DEFINE_SPINLOCK(zcrypt_ops_list_lock); |
| static LIST_HEAD(zcrypt_ops_list); |
| |
| static debug_info_t *zcrypt_dbf_common; |
| static debug_info_t *zcrypt_dbf_devices; |
| static struct dentry *debugfs_root; |
| |
| /* |
| * Device attributes common for all crypto devices. |
| */ |
| static ssize_t zcrypt_type_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct zcrypt_device *zdev = to_ap_dev(dev)->private; |
| return snprintf(buf, PAGE_SIZE, "%s\n", zdev->type_string); |
| } |
| |
| static DEVICE_ATTR(type, 0444, zcrypt_type_show, NULL); |
| |
| static ssize_t zcrypt_online_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct zcrypt_device *zdev = to_ap_dev(dev)->private; |
| return snprintf(buf, PAGE_SIZE, "%d\n", zdev->online); |
| } |
| |
| static ssize_t zcrypt_online_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct zcrypt_device *zdev = to_ap_dev(dev)->private; |
| int online; |
| |
| if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1) |
| return -EINVAL; |
| zdev->online = online; |
| ZCRYPT_DBF_DEV(DBF_INFO, zdev, "dev%04xo%dman", zdev->ap_dev->qid, |
| zdev->online); |
| if (!online) |
| ap_flush_queue(zdev->ap_dev); |
| return count; |
| } |
| |
| static DEVICE_ATTR(online, 0644, zcrypt_online_show, zcrypt_online_store); |
| |
| static struct attribute * zcrypt_device_attrs[] = { |
| &dev_attr_type.attr, |
| &dev_attr_online.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group zcrypt_device_attr_group = { |
| .attrs = zcrypt_device_attrs, |
| }; |
| |
| /** |
| * Process a rescan of the transport layer. |
| * |
| * Returns 1, if the rescan has been processed, otherwise 0. |
| */ |
| static inline int zcrypt_process_rescan(void) |
| { |
| if (atomic_read(&zcrypt_rescan_req)) { |
| atomic_set(&zcrypt_rescan_req, 0); |
| atomic_inc(&zcrypt_rescan_count); |
| ap_bus_force_rescan(); |
| ZCRYPT_DBF_COMMON(DBF_INFO, "rescan%07d", |
| atomic_inc_return(&zcrypt_rescan_count)); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /** |
| * __zcrypt_increase_preference(): Increase preference of a crypto device. |
| * @zdev: Pointer the crypto device |
| * |
| * Move the device towards the head of the device list. |
| * Need to be called while holding the zcrypt device list lock. |
| * Note: cards with speed_rating of 0 are kept at the end of the list. |
| */ |
| static void __zcrypt_increase_preference(struct zcrypt_device *zdev) |
| { |
| struct zcrypt_device *tmp; |
| struct list_head *l; |
| |
| if (zdev->speed_rating == 0) |
| return; |
| for (l = zdev->list.prev; l != &zcrypt_device_list; l = l->prev) { |
| tmp = list_entry(l, struct zcrypt_device, list); |
| if ((tmp->request_count + 1) * tmp->speed_rating <= |
| (zdev->request_count + 1) * zdev->speed_rating && |
| tmp->speed_rating != 0) |
| break; |
| } |
| if (l == zdev->list.prev) |
| return; |
| /* Move zdev behind l */ |
| list_move(&zdev->list, l); |
| } |
| |
| /** |
| * __zcrypt_decrease_preference(): Decrease preference of a crypto device. |
| * @zdev: Pointer to a crypto device. |
| * |
| * Move the device towards the tail of the device list. |
| * Need to be called while holding the zcrypt device list lock. |
| * Note: cards with speed_rating of 0 are kept at the end of the list. |
| */ |
| static void __zcrypt_decrease_preference(struct zcrypt_device *zdev) |
| { |
| struct zcrypt_device *tmp; |
| struct list_head *l; |
| |
| if (zdev->speed_rating == 0) |
| return; |
| for (l = zdev->list.next; l != &zcrypt_device_list; l = l->next) { |
| tmp = list_entry(l, struct zcrypt_device, list); |
| if ((tmp->request_count + 1) * tmp->speed_rating > |
| (zdev->request_count + 1) * zdev->speed_rating || |
| tmp->speed_rating == 0) |
| break; |
| } |
| if (l == zdev->list.next) |
| return; |
| /* Move zdev before l */ |
| list_move_tail(&zdev->list, l); |
| } |
| |
| static void zcrypt_device_release(struct kref *kref) |
| { |
| struct zcrypt_device *zdev = |
| container_of(kref, struct zcrypt_device, refcount); |
| zcrypt_device_free(zdev); |
| } |
| |
| void zcrypt_device_get(struct zcrypt_device *zdev) |
| { |
| kref_get(&zdev->refcount); |
| } |
| EXPORT_SYMBOL(zcrypt_device_get); |
| |
| int zcrypt_device_put(struct zcrypt_device *zdev) |
| { |
| return kref_put(&zdev->refcount, zcrypt_device_release); |
| } |
| EXPORT_SYMBOL(zcrypt_device_put); |
| |
| struct zcrypt_device *zcrypt_device_alloc(size_t max_response_size) |
| { |
| struct zcrypt_device *zdev; |
| |
| zdev = kzalloc(sizeof(struct zcrypt_device), GFP_KERNEL); |
| if (!zdev) |
| return NULL; |
| zdev->reply.message = kmalloc(max_response_size, GFP_KERNEL); |
| if (!zdev->reply.message) |
| goto out_free; |
| zdev->reply.length = max_response_size; |
| spin_lock_init(&zdev->lock); |
| INIT_LIST_HEAD(&zdev->list); |
| zdev->dbf_area = zcrypt_dbf_devices; |
| return zdev; |
| |
| out_free: |
| kfree(zdev); |
| return NULL; |
| } |
| EXPORT_SYMBOL(zcrypt_device_alloc); |
| |
| void zcrypt_device_free(struct zcrypt_device *zdev) |
| { |
| kfree(zdev->reply.message); |
| kfree(zdev); |
| } |
| EXPORT_SYMBOL(zcrypt_device_free); |
| |
| /** |
| * zcrypt_device_register() - Register a crypto device. |
| * @zdev: Pointer to a crypto device |
| * |
| * Register a crypto device. Returns 0 if successful. |
| */ |
| int zcrypt_device_register(struct zcrypt_device *zdev) |
| { |
| int rc; |
| |
| if (!zdev->ops) |
| return -ENODEV; |
| rc = sysfs_create_group(&zdev->ap_dev->device.kobj, |
| &zcrypt_device_attr_group); |
| if (rc) |
| goto out; |
| get_device(&zdev->ap_dev->device); |
| kref_init(&zdev->refcount); |
| spin_lock_bh(&zcrypt_device_lock); |
| zdev->online = 1; /* New devices are online by default. */ |
| ZCRYPT_DBF_DEV(DBF_INFO, zdev, "dev%04xo%dreg", zdev->ap_dev->qid, |
| zdev->online); |
| list_add_tail(&zdev->list, &zcrypt_device_list); |
| __zcrypt_increase_preference(zdev); |
| zcrypt_device_count++; |
| spin_unlock_bh(&zcrypt_device_lock); |
| if (zdev->ops->rng) { |
| rc = zcrypt_rng_device_add(); |
| if (rc) |
| goto out_unregister; |
| } |
| return 0; |
| |
| out_unregister: |
| spin_lock_bh(&zcrypt_device_lock); |
| zcrypt_device_count--; |
| list_del_init(&zdev->list); |
| spin_unlock_bh(&zcrypt_device_lock); |
| sysfs_remove_group(&zdev->ap_dev->device.kobj, |
| &zcrypt_device_attr_group); |
| put_device(&zdev->ap_dev->device); |
| zcrypt_device_put(zdev); |
| out: |
| return rc; |
| } |
| EXPORT_SYMBOL(zcrypt_device_register); |
| |
| /** |
| * zcrypt_device_unregister(): Unregister a crypto device. |
| * @zdev: Pointer to crypto device |
| * |
| * Unregister a crypto device. |
| */ |
| void zcrypt_device_unregister(struct zcrypt_device *zdev) |
| { |
| if (zdev->ops->rng) |
| zcrypt_rng_device_remove(); |
| spin_lock_bh(&zcrypt_device_lock); |
| zcrypt_device_count--; |
| list_del_init(&zdev->list); |
| spin_unlock_bh(&zcrypt_device_lock); |
| sysfs_remove_group(&zdev->ap_dev->device.kobj, |
| &zcrypt_device_attr_group); |
| put_device(&zdev->ap_dev->device); |
| zcrypt_device_put(zdev); |
| } |
| EXPORT_SYMBOL(zcrypt_device_unregister); |
| |
| void zcrypt_msgtype_register(struct zcrypt_ops *zops) |
| { |
| if (zops->owner) { |
| spin_lock_bh(&zcrypt_ops_list_lock); |
| list_add_tail(&zops->list, &zcrypt_ops_list); |
| spin_unlock_bh(&zcrypt_ops_list_lock); |
| } |
| } |
| EXPORT_SYMBOL(zcrypt_msgtype_register); |
| |
| void zcrypt_msgtype_unregister(struct zcrypt_ops *zops) |
| { |
| spin_lock_bh(&zcrypt_ops_list_lock); |
| list_del_init(&zops->list); |
| spin_unlock_bh(&zcrypt_ops_list_lock); |
| } |
| EXPORT_SYMBOL(zcrypt_msgtype_unregister); |
| |
| static inline |
| struct zcrypt_ops *__ops_lookup(unsigned char *name, int variant) |
| { |
| struct zcrypt_ops *zops; |
| int found = 0; |
| |
| spin_lock_bh(&zcrypt_ops_list_lock); |
| list_for_each_entry(zops, &zcrypt_ops_list, list) { |
| if ((zops->variant == variant) && |
| (!strncmp(zops->owner->name, name, MODULE_NAME_LEN))) { |
| found = 1; |
| break; |
| } |
| } |
| spin_unlock_bh(&zcrypt_ops_list_lock); |
| |
| if (!found) |
| return NULL; |
| return zops; |
| } |
| |
| struct zcrypt_ops *zcrypt_msgtype_request(unsigned char *name, int variant) |
| { |
| struct zcrypt_ops *zops = NULL; |
| |
| zops = __ops_lookup(name, variant); |
| if (!zops) { |
| request_module(name); |
| zops = __ops_lookup(name, variant); |
| } |
| if ((!zops) || (!try_module_get(zops->owner))) |
| return NULL; |
| return zops; |
| } |
| EXPORT_SYMBOL(zcrypt_msgtype_request); |
| |
| void zcrypt_msgtype_release(struct zcrypt_ops *zops) |
| { |
| if (zops) |
| module_put(zops->owner); |
| } |
| EXPORT_SYMBOL(zcrypt_msgtype_release); |
| |
| /** |
| * zcrypt_read (): Not supported beyond zcrypt 1.3.1. |
| * |
| * This function is not supported beyond zcrypt 1.3.1. |
| */ |
| static ssize_t zcrypt_read(struct file *filp, char __user *buf, |
| size_t count, loff_t *f_pos) |
| { |
| return -EPERM; |
| } |
| |
| /** |
| * zcrypt_write(): Not allowed. |
| * |
| * Write is is not allowed |
| */ |
| static ssize_t zcrypt_write(struct file *filp, const char __user *buf, |
| size_t count, loff_t *f_pos) |
| { |
| return -EPERM; |
| } |
| |
| /** |
| * zcrypt_open(): Count number of users. |
| * |
| * Device open function to count number of users. |
| */ |
| static int zcrypt_open(struct inode *inode, struct file *filp) |
| { |
| atomic_inc(&zcrypt_open_count); |
| return nonseekable_open(inode, filp); |
| } |
| |
| /** |
| * zcrypt_release(): Count number of users. |
| * |
| * Device close function to count number of users. |
| */ |
| static int zcrypt_release(struct inode *inode, struct file *filp) |
| { |
| atomic_dec(&zcrypt_open_count); |
| return 0; |
| } |
| |
| /* |
| * zcrypt ioctls. |
| */ |
| static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex) |
| { |
| struct zcrypt_device *zdev; |
| int rc; |
| |
| if (mex->outputdatalength < mex->inputdatalength) |
| return -EINVAL; |
| /* |
| * As long as outputdatalength is big enough, we can set the |
| * outputdatalength equal to the inputdatalength, since that is the |
| * number of bytes we will copy in any case |
| */ |
| mex->outputdatalength = mex->inputdatalength; |
| |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) { |
| if (!zdev->online || |
| !zdev->ops->rsa_modexpo || |
| zdev->min_mod_size > mex->inputdatalength || |
| zdev->max_mod_size < mex->inputdatalength) |
| continue; |
| zcrypt_device_get(zdev); |
| get_device(&zdev->ap_dev->device); |
| zdev->request_count++; |
| __zcrypt_decrease_preference(zdev); |
| if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
| spin_unlock_bh(&zcrypt_device_lock); |
| rc = zdev->ops->rsa_modexpo(zdev, mex); |
| spin_lock_bh(&zcrypt_device_lock); |
| module_put(zdev->ap_dev->drv->driver.owner); |
| } |
| else |
| rc = -EAGAIN; |
| zdev->request_count--; |
| __zcrypt_increase_preference(zdev); |
| put_device(&zdev->ap_dev->device); |
| zcrypt_device_put(zdev); |
| spin_unlock_bh(&zcrypt_device_lock); |
| return rc; |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| return -ENODEV; |
| } |
| |
| static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt) |
| { |
| struct zcrypt_device *zdev; |
| unsigned long long z1, z2, z3; |
| int rc, copied; |
| |
| if (crt->outputdatalength < crt->inputdatalength || |
| (crt->inputdatalength & 1)) |
| return -EINVAL; |
| /* |
| * As long as outputdatalength is big enough, we can set the |
| * outputdatalength equal to the inputdatalength, since that is the |
| * number of bytes we will copy in any case |
| */ |
| crt->outputdatalength = crt->inputdatalength; |
| |
| copied = 0; |
| restart: |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) { |
| if (!zdev->online || |
| !zdev->ops->rsa_modexpo_crt || |
| zdev->min_mod_size > crt->inputdatalength || |
| zdev->max_mod_size < crt->inputdatalength) |
| continue; |
| if (zdev->short_crt && crt->inputdatalength > 240) { |
| /* |
| * Check inputdata for leading zeros for cards |
| * that can't handle np_prime, bp_key, or |
| * u_mult_inv > 128 bytes. |
| */ |
| if (copied == 0) { |
| unsigned int len; |
| spin_unlock_bh(&zcrypt_device_lock); |
| /* len is max 256 / 2 - 120 = 8 |
| * For bigger device just assume len of leading |
| * 0s is 8 as stated in the requirements for |
| * ica_rsa_modexpo_crt struct in zcrypt.h. |
| */ |
| if (crt->inputdatalength <= 256) |
| len = crt->inputdatalength / 2 - 120; |
| else |
| len = 8; |
| if (len > sizeof(z1)) |
| return -EFAULT; |
| z1 = z2 = z3 = 0; |
| if (copy_from_user(&z1, crt->np_prime, len) || |
| copy_from_user(&z2, crt->bp_key, len) || |
| copy_from_user(&z3, crt->u_mult_inv, len)) |
| return -EFAULT; |
| z1 = z2 = z3 = 0; |
| copied = 1; |
| /* |
| * We have to restart device lookup - |
| * the device list may have changed by now. |
| */ |
| goto restart; |
| } |
| if (z1 != 0ULL || z2 != 0ULL || z3 != 0ULL) |
| /* The device can't handle this request. */ |
| continue; |
| } |
| zcrypt_device_get(zdev); |
| get_device(&zdev->ap_dev->device); |
| zdev->request_count++; |
| __zcrypt_decrease_preference(zdev); |
| if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
| spin_unlock_bh(&zcrypt_device_lock); |
| rc = zdev->ops->rsa_modexpo_crt(zdev, crt); |
| spin_lock_bh(&zcrypt_device_lock); |
| module_put(zdev->ap_dev->drv->driver.owner); |
| } |
| else |
| rc = -EAGAIN; |
| zdev->request_count--; |
| __zcrypt_increase_preference(zdev); |
| put_device(&zdev->ap_dev->device); |
| zcrypt_device_put(zdev); |
| spin_unlock_bh(&zcrypt_device_lock); |
| return rc; |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| return -ENODEV; |
| } |
| |
| static long zcrypt_send_cprb(struct ica_xcRB *xcRB) |
| { |
| struct zcrypt_device *zdev; |
| int rc; |
| |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) { |
| if (!zdev->online || !zdev->ops->send_cprb || |
| (zdev->ops->variant == MSGTYPE06_VARIANT_EP11) || |
| (xcRB->user_defined != AUTOSELECT && |
| AP_QID_DEVICE(zdev->ap_dev->qid) != xcRB->user_defined)) |
| continue; |
| zcrypt_device_get(zdev); |
| get_device(&zdev->ap_dev->device); |
| zdev->request_count++; |
| __zcrypt_decrease_preference(zdev); |
| if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
| spin_unlock_bh(&zcrypt_device_lock); |
| rc = zdev->ops->send_cprb(zdev, xcRB); |
| spin_lock_bh(&zcrypt_device_lock); |
| module_put(zdev->ap_dev->drv->driver.owner); |
| } |
| else |
| rc = -EAGAIN; |
| zdev->request_count--; |
| __zcrypt_increase_preference(zdev); |
| put_device(&zdev->ap_dev->device); |
| zcrypt_device_put(zdev); |
| spin_unlock_bh(&zcrypt_device_lock); |
| return rc; |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| return -ENODEV; |
| } |
| |
| struct ep11_target_dev_list { |
| unsigned short targets_num; |
| struct ep11_target_dev *targets; |
| }; |
| |
| static bool is_desired_ep11dev(unsigned int dev_qid, |
| struct ep11_target_dev_list dev_list) |
| { |
| int n; |
| |
| for (n = 0; n < dev_list.targets_num; n++, dev_list.targets++) { |
| if ((AP_QID_DEVICE(dev_qid) == dev_list.targets->ap_id) && |
| (AP_QID_QUEUE(dev_qid) == dev_list.targets->dom_id)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb) |
| { |
| struct zcrypt_device *zdev; |
| bool autoselect = false; |
| int rc; |
| struct ep11_target_dev_list ep11_dev_list = { |
| .targets_num = 0x00, |
| .targets = NULL, |
| }; |
| |
| ep11_dev_list.targets_num = (unsigned short) xcrb->targets_num; |
| |
| /* empty list indicates autoselect (all available targets) */ |
| if (ep11_dev_list.targets_num == 0) |
| autoselect = true; |
| else { |
| ep11_dev_list.targets = kcalloc((unsigned short) |
| xcrb->targets_num, |
| sizeof(struct ep11_target_dev), |
| GFP_KERNEL); |
| if (!ep11_dev_list.targets) |
| return -ENOMEM; |
| |
| if (copy_from_user(ep11_dev_list.targets, |
| (struct ep11_target_dev *)xcrb->targets, |
| xcrb->targets_num * |
| sizeof(struct ep11_target_dev))) |
| return -EFAULT; |
| } |
| |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) { |
| /* check if device is eligible */ |
| if (!zdev->online || |
| zdev->ops->variant != MSGTYPE06_VARIANT_EP11) |
| continue; |
| |
| /* check if device is selected as valid target */ |
| if (!is_desired_ep11dev(zdev->ap_dev->qid, ep11_dev_list) && |
| !autoselect) |
| continue; |
| |
| zcrypt_device_get(zdev); |
| get_device(&zdev->ap_dev->device); |
| zdev->request_count++; |
| __zcrypt_decrease_preference(zdev); |
| if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
| spin_unlock_bh(&zcrypt_device_lock); |
| rc = zdev->ops->send_ep11_cprb(zdev, xcrb); |
| spin_lock_bh(&zcrypt_device_lock); |
| module_put(zdev->ap_dev->drv->driver.owner); |
| } else { |
| rc = -EAGAIN; |
| } |
| zdev->request_count--; |
| __zcrypt_increase_preference(zdev); |
| put_device(&zdev->ap_dev->device); |
| zcrypt_device_put(zdev); |
| spin_unlock_bh(&zcrypt_device_lock); |
| return rc; |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| return -ENODEV; |
| } |
| |
| static long zcrypt_rng(char *buffer) |
| { |
| struct zcrypt_device *zdev; |
| int rc; |
| |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) { |
| if (!zdev->online || !zdev->ops->rng) |
| continue; |
| zcrypt_device_get(zdev); |
| get_device(&zdev->ap_dev->device); |
| zdev->request_count++; |
| __zcrypt_decrease_preference(zdev); |
| if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
| spin_unlock_bh(&zcrypt_device_lock); |
| rc = zdev->ops->rng(zdev, buffer); |
| spin_lock_bh(&zcrypt_device_lock); |
| module_put(zdev->ap_dev->drv->driver.owner); |
| } else |
| rc = -EAGAIN; |
| zdev->request_count--; |
| __zcrypt_increase_preference(zdev); |
| put_device(&zdev->ap_dev->device); |
| zcrypt_device_put(zdev); |
| spin_unlock_bh(&zcrypt_device_lock); |
| return rc; |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| return -ENODEV; |
| } |
| |
| static void zcrypt_status_mask(char status[AP_DEVICES]) |
| { |
| struct zcrypt_device *zdev; |
| |
| memset(status, 0, sizeof(char) * AP_DEVICES); |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) |
| status[AP_QID_DEVICE(zdev->ap_dev->qid)] = |
| zdev->online ? zdev->user_space_type : 0x0d; |
| spin_unlock_bh(&zcrypt_device_lock); |
| } |
| |
| static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES]) |
| { |
| struct zcrypt_device *zdev; |
| |
| memset(qdepth, 0, sizeof(char) * AP_DEVICES); |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) { |
| spin_lock(&zdev->ap_dev->lock); |
| qdepth[AP_QID_DEVICE(zdev->ap_dev->qid)] = |
| zdev->ap_dev->pendingq_count + |
| zdev->ap_dev->requestq_count; |
| spin_unlock(&zdev->ap_dev->lock); |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| } |
| |
| static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES]) |
| { |
| struct zcrypt_device *zdev; |
| |
| memset(reqcnt, 0, sizeof(int) * AP_DEVICES); |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) { |
| spin_lock(&zdev->ap_dev->lock); |
| reqcnt[AP_QID_DEVICE(zdev->ap_dev->qid)] = |
| zdev->ap_dev->total_request_count; |
| spin_unlock(&zdev->ap_dev->lock); |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| } |
| |
| static int zcrypt_pendingq_count(void) |
| { |
| struct zcrypt_device *zdev; |
| int pendingq_count = 0; |
| |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) { |
| spin_lock(&zdev->ap_dev->lock); |
| pendingq_count += zdev->ap_dev->pendingq_count; |
| spin_unlock(&zdev->ap_dev->lock); |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| return pendingq_count; |
| } |
| |
| static int zcrypt_requestq_count(void) |
| { |
| struct zcrypt_device *zdev; |
| int requestq_count = 0; |
| |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) { |
| spin_lock(&zdev->ap_dev->lock); |
| requestq_count += zdev->ap_dev->requestq_count; |
| spin_unlock(&zdev->ap_dev->lock); |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| return requestq_count; |
| } |
| |
| static int zcrypt_count_type(int type) |
| { |
| struct zcrypt_device *zdev; |
| int device_count = 0; |
| |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) |
| if (zdev->user_space_type == type) |
| device_count++; |
| spin_unlock_bh(&zcrypt_device_lock); |
| return device_count; |
| } |
| |
| /** |
| * zcrypt_ica_status(): Old, depracted combi status call. |
| * |
| * Old, deprecated combi status call. |
| */ |
| static long zcrypt_ica_status(struct file *filp, unsigned long arg) |
| { |
| struct ica_z90_status *pstat; |
| int ret; |
| |
| pstat = kzalloc(sizeof(*pstat), GFP_KERNEL); |
| if (!pstat) |
| return -ENOMEM; |
| pstat->totalcount = zcrypt_device_count; |
| pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA); |
| pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC); |
| pstat->requestqWaitCount = zcrypt_requestq_count(); |
| pstat->pendingqWaitCount = zcrypt_pendingq_count(); |
| pstat->totalOpenCount = atomic_read(&zcrypt_open_count); |
| pstat->cryptoDomain = ap_domain_index; |
| zcrypt_status_mask(pstat->status); |
| zcrypt_qdepth_mask(pstat->qdepth); |
| ret = 0; |
| if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat))) |
| ret = -EFAULT; |
| kfree(pstat); |
| return ret; |
| } |
| |
| static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| int rc; |
| |
| switch (cmd) { |
| case ICARSAMODEXPO: { |
| struct ica_rsa_modexpo __user *umex = (void __user *) arg; |
| struct ica_rsa_modexpo mex; |
| if (copy_from_user(&mex, umex, sizeof(mex))) |
| return -EFAULT; |
| do { |
| rc = zcrypt_rsa_modexpo(&mex); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_modexpo(&mex); |
| } while (rc == -EAGAIN); |
| if (rc) |
| return rc; |
| return put_user(mex.outputdatalength, &umex->outputdatalength); |
| } |
| case ICARSACRT: { |
| struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg; |
| struct ica_rsa_modexpo_crt crt; |
| if (copy_from_user(&crt, ucrt, sizeof(crt))) |
| return -EFAULT; |
| do { |
| rc = zcrypt_rsa_crt(&crt); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_crt(&crt); |
| } while (rc == -EAGAIN); |
| if (rc) |
| return rc; |
| return put_user(crt.outputdatalength, &ucrt->outputdatalength); |
| } |
| case ZSECSENDCPRB: { |
| struct ica_xcRB __user *uxcRB = (void __user *) arg; |
| struct ica_xcRB xcRB; |
| if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB))) |
| return -EFAULT; |
| do { |
| rc = zcrypt_send_cprb(&xcRB); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_send_cprb(&xcRB); |
| } while (rc == -EAGAIN); |
| if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB))) |
| return -EFAULT; |
| return rc; |
| } |
| case ZSENDEP11CPRB: { |
| struct ep11_urb __user *uxcrb = (void __user *)arg; |
| struct ep11_urb xcrb; |
| if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb))) |
| return -EFAULT; |
| do { |
| rc = zcrypt_send_ep11_cprb(&xcrb); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_send_ep11_cprb(&xcrb); |
| } while (rc == -EAGAIN); |
| if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb))) |
| return -EFAULT; |
| return rc; |
| } |
| case Z90STAT_STATUS_MASK: { |
| char status[AP_DEVICES]; |
| zcrypt_status_mask(status); |
| if (copy_to_user((char __user *) arg, status, |
| sizeof(char) * AP_DEVICES)) |
| return -EFAULT; |
| return 0; |
| } |
| case Z90STAT_QDEPTH_MASK: { |
| char qdepth[AP_DEVICES]; |
| zcrypt_qdepth_mask(qdepth); |
| if (copy_to_user((char __user *) arg, qdepth, |
| sizeof(char) * AP_DEVICES)) |
| return -EFAULT; |
| return 0; |
| } |
| case Z90STAT_PERDEV_REQCNT: { |
| int reqcnt[AP_DEVICES]; |
| zcrypt_perdev_reqcnt(reqcnt); |
| if (copy_to_user((int __user *) arg, reqcnt, |
| sizeof(int) * AP_DEVICES)) |
| return -EFAULT; |
| return 0; |
| } |
| case Z90STAT_REQUESTQ_COUNT: |
| return put_user(zcrypt_requestq_count(), (int __user *) arg); |
| case Z90STAT_PENDINGQ_COUNT: |
| return put_user(zcrypt_pendingq_count(), (int __user *) arg); |
| case Z90STAT_TOTALOPEN_COUNT: |
| return put_user(atomic_read(&zcrypt_open_count), |
| (int __user *) arg); |
| case Z90STAT_DOMAIN_INDEX: |
| return put_user(ap_domain_index, (int __user *) arg); |
| /* |
| * Deprecated ioctls. Don't add another device count ioctl, |
| * you can count them yourself in the user space with the |
| * output of the Z90STAT_STATUS_MASK ioctl. |
| */ |
| case ICAZ90STATUS: |
| return zcrypt_ica_status(filp, arg); |
| case Z90STAT_TOTALCOUNT: |
| return put_user(zcrypt_device_count, (int __user *) arg); |
| case Z90STAT_PCICACOUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_PCICA), |
| (int __user *) arg); |
| case Z90STAT_PCICCCOUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_PCICC), |
| (int __user *) arg); |
| case Z90STAT_PCIXCCMCL2COUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2), |
| (int __user *) arg); |
| case Z90STAT_PCIXCCMCL3COUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), |
| (int __user *) arg); |
| case Z90STAT_PCIXCCCOUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) + |
| zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), |
| (int __user *) arg); |
| case Z90STAT_CEX2CCOUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_CEX2C), |
| (int __user *) arg); |
| case Z90STAT_CEX2ACOUNT: |
| return put_user(zcrypt_count_type(ZCRYPT_CEX2A), |
| (int __user *) arg); |
| default: |
| /* unknown ioctl number */ |
| return -ENOIOCTLCMD; |
| } |
| } |
| |
| #ifdef CONFIG_COMPAT |
| /* |
| * ioctl32 conversion routines |
| */ |
| struct compat_ica_rsa_modexpo { |
| compat_uptr_t inputdata; |
| unsigned int inputdatalength; |
| compat_uptr_t outputdata; |
| unsigned int outputdatalength; |
| compat_uptr_t b_key; |
| compat_uptr_t n_modulus; |
| }; |
| |
| static long trans_modexpo32(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg); |
| struct compat_ica_rsa_modexpo mex32; |
| struct ica_rsa_modexpo mex64; |
| long rc; |
| |
| if (copy_from_user(&mex32, umex32, sizeof(mex32))) |
| return -EFAULT; |
| mex64.inputdata = compat_ptr(mex32.inputdata); |
| mex64.inputdatalength = mex32.inputdatalength; |
| mex64.outputdata = compat_ptr(mex32.outputdata); |
| mex64.outputdatalength = mex32.outputdatalength; |
| mex64.b_key = compat_ptr(mex32.b_key); |
| mex64.n_modulus = compat_ptr(mex32.n_modulus); |
| do { |
| rc = zcrypt_rsa_modexpo(&mex64); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_modexpo(&mex64); |
| } while (rc == -EAGAIN); |
| if (rc) |
| return rc; |
| return put_user(mex64.outputdatalength, |
| &umex32->outputdatalength); |
| } |
| |
| struct compat_ica_rsa_modexpo_crt { |
| compat_uptr_t inputdata; |
| unsigned int inputdatalength; |
| compat_uptr_t outputdata; |
| unsigned int outputdatalength; |
| compat_uptr_t bp_key; |
| compat_uptr_t bq_key; |
| compat_uptr_t np_prime; |
| compat_uptr_t nq_prime; |
| compat_uptr_t u_mult_inv; |
| }; |
| |
| static long trans_modexpo_crt32(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg); |
| struct compat_ica_rsa_modexpo_crt crt32; |
| struct ica_rsa_modexpo_crt crt64; |
| long rc; |
| |
| if (copy_from_user(&crt32, ucrt32, sizeof(crt32))) |
| return -EFAULT; |
| crt64.inputdata = compat_ptr(crt32.inputdata); |
| crt64.inputdatalength = crt32.inputdatalength; |
| crt64.outputdata= compat_ptr(crt32.outputdata); |
| crt64.outputdatalength = crt32.outputdatalength; |
| crt64.bp_key = compat_ptr(crt32.bp_key); |
| crt64.bq_key = compat_ptr(crt32.bq_key); |
| crt64.np_prime = compat_ptr(crt32.np_prime); |
| crt64.nq_prime = compat_ptr(crt32.nq_prime); |
| crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv); |
| do { |
| rc = zcrypt_rsa_crt(&crt64); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_rsa_crt(&crt64); |
| } while (rc == -EAGAIN); |
| if (rc) |
| return rc; |
| return put_user(crt64.outputdatalength, |
| &ucrt32->outputdatalength); |
| } |
| |
| struct compat_ica_xcRB { |
| unsigned short agent_ID; |
| unsigned int user_defined; |
| unsigned short request_ID; |
| unsigned int request_control_blk_length; |
| unsigned char padding1[16 - sizeof (compat_uptr_t)]; |
| compat_uptr_t request_control_blk_addr; |
| unsigned int request_data_length; |
| char padding2[16 - sizeof (compat_uptr_t)]; |
| compat_uptr_t request_data_address; |
| unsigned int reply_control_blk_length; |
| char padding3[16 - sizeof (compat_uptr_t)]; |
| compat_uptr_t reply_control_blk_addr; |
| unsigned int reply_data_length; |
| char padding4[16 - sizeof (compat_uptr_t)]; |
| compat_uptr_t reply_data_addr; |
| unsigned short priority_window; |
| unsigned int status; |
| } __attribute__((packed)); |
| |
| static long trans_xcRB32(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg); |
| struct compat_ica_xcRB xcRB32; |
| struct ica_xcRB xcRB64; |
| long rc; |
| |
| if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32))) |
| return -EFAULT; |
| xcRB64.agent_ID = xcRB32.agent_ID; |
| xcRB64.user_defined = xcRB32.user_defined; |
| xcRB64.request_ID = xcRB32.request_ID; |
| xcRB64.request_control_blk_length = |
| xcRB32.request_control_blk_length; |
| xcRB64.request_control_blk_addr = |
| compat_ptr(xcRB32.request_control_blk_addr); |
| xcRB64.request_data_length = |
| xcRB32.request_data_length; |
| xcRB64.request_data_address = |
| compat_ptr(xcRB32.request_data_address); |
| xcRB64.reply_control_blk_length = |
| xcRB32.reply_control_blk_length; |
| xcRB64.reply_control_blk_addr = |
| compat_ptr(xcRB32.reply_control_blk_addr); |
| xcRB64.reply_data_length = xcRB32.reply_data_length; |
| xcRB64.reply_data_addr = |
| compat_ptr(xcRB32.reply_data_addr); |
| xcRB64.priority_window = xcRB32.priority_window; |
| xcRB64.status = xcRB32.status; |
| do { |
| rc = zcrypt_send_cprb(&xcRB64); |
| } while (rc == -EAGAIN); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| do { |
| rc = zcrypt_send_cprb(&xcRB64); |
| } while (rc == -EAGAIN); |
| xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length; |
| xcRB32.reply_data_length = xcRB64.reply_data_length; |
| xcRB32.status = xcRB64.status; |
| if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32))) |
| return -EFAULT; |
| return rc; |
| } |
| |
| static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd, |
| unsigned long arg) |
| { |
| if (cmd == ICARSAMODEXPO) |
| return trans_modexpo32(filp, cmd, arg); |
| if (cmd == ICARSACRT) |
| return trans_modexpo_crt32(filp, cmd, arg); |
| if (cmd == ZSECSENDCPRB) |
| return trans_xcRB32(filp, cmd, arg); |
| return zcrypt_unlocked_ioctl(filp, cmd, arg); |
| } |
| #endif |
| |
| /* |
| * Misc device file operations. |
| */ |
| static const struct file_operations zcrypt_fops = { |
| .owner = THIS_MODULE, |
| .read = zcrypt_read, |
| .write = zcrypt_write, |
| .unlocked_ioctl = zcrypt_unlocked_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = zcrypt_compat_ioctl, |
| #endif |
| .open = zcrypt_open, |
| .release = zcrypt_release, |
| .llseek = no_llseek, |
| }; |
| |
| /* |
| * Misc device. |
| */ |
| static struct miscdevice zcrypt_misc_device = { |
| .minor = MISC_DYNAMIC_MINOR, |
| .name = "z90crypt", |
| .fops = &zcrypt_fops, |
| }; |
| |
| /* |
| * Deprecated /proc entry support. |
| */ |
| static struct proc_dir_entry *zcrypt_entry; |
| |
| static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len) |
| { |
| int i; |
| |
| for (i = 0; i < len; i++) |
| seq_printf(m, "%01x", (unsigned int) addr[i]); |
| seq_putc(m, ' '); |
| } |
| |
| static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len) |
| { |
| int inl, c, cx; |
| |
| seq_printf(m, " "); |
| inl = 0; |
| for (c = 0; c < (len / 16); c++) { |
| sprintcl(m, addr+inl, 16); |
| inl += 16; |
| } |
| cx = len%16; |
| if (cx) { |
| sprintcl(m, addr+inl, cx); |
| inl += cx; |
| } |
| seq_putc(m, '\n'); |
| } |
| |
| static void sprinthx(unsigned char *title, struct seq_file *m, |
| unsigned char *addr, unsigned int len) |
| { |
| int inl, r, rx; |
| |
| seq_printf(m, "\n%s\n", title); |
| inl = 0; |
| for (r = 0; r < (len / 64); r++) { |
| sprintrw(m, addr+inl, 64); |
| inl += 64; |
| } |
| rx = len % 64; |
| if (rx) { |
| sprintrw(m, addr+inl, rx); |
| inl += rx; |
| } |
| seq_putc(m, '\n'); |
| } |
| |
| static void sprinthx4(unsigned char *title, struct seq_file *m, |
| unsigned int *array, unsigned int len) |
| { |
| int r; |
| |
| seq_printf(m, "\n%s\n", title); |
| for (r = 0; r < len; r++) { |
| if ((r % 8) == 0) |
| seq_printf(m, " "); |
| seq_printf(m, "%08X ", array[r]); |
| if ((r % 8) == 7) |
| seq_putc(m, '\n'); |
| } |
| seq_putc(m, '\n'); |
| } |
| |
| static int zcrypt_proc_show(struct seq_file *m, void *v) |
| { |
| char workarea[sizeof(int) * AP_DEVICES]; |
| |
| seq_printf(m, "\nzcrypt version: %d.%d.%d\n", |
| ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT); |
| seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index); |
| seq_printf(m, "Total device count: %d\n", zcrypt_device_count); |
| seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA)); |
| seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC)); |
| seq_printf(m, "PCIXCC MCL2 count: %d\n", |
| zcrypt_count_type(ZCRYPT_PCIXCC_MCL2)); |
| seq_printf(m, "PCIXCC MCL3 count: %d\n", |
| zcrypt_count_type(ZCRYPT_PCIXCC_MCL3)); |
| seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C)); |
| seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A)); |
| seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C)); |
| seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A)); |
| seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count()); |
| seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count()); |
| seq_printf(m, "Total open handles: %d\n\n", |
| atomic_read(&zcrypt_open_count)); |
| zcrypt_status_mask(workarea); |
| sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) " |
| "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A", |
| m, workarea, AP_DEVICES); |
| zcrypt_qdepth_mask(workarea); |
| sprinthx("Waiting work element counts", m, workarea, AP_DEVICES); |
| zcrypt_perdev_reqcnt((int *) workarea); |
| sprinthx4("Per-device successfully completed request counts", |
| m, (unsigned int *) workarea, AP_DEVICES); |
| return 0; |
| } |
| |
| static int zcrypt_proc_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, zcrypt_proc_show, NULL); |
| } |
| |
| static void zcrypt_disable_card(int index) |
| { |
| struct zcrypt_device *zdev; |
| |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) |
| if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) { |
| zdev->online = 0; |
| ap_flush_queue(zdev->ap_dev); |
| break; |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| } |
| |
| static void zcrypt_enable_card(int index) |
| { |
| struct zcrypt_device *zdev; |
| |
| spin_lock_bh(&zcrypt_device_lock); |
| list_for_each_entry(zdev, &zcrypt_device_list, list) |
| if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) { |
| zdev->online = 1; |
| break; |
| } |
| spin_unlock_bh(&zcrypt_device_lock); |
| } |
| |
| static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer, |
| size_t count, loff_t *pos) |
| { |
| unsigned char *lbuf, *ptr; |
| size_t local_count; |
| int j; |
| |
| if (count <= 0) |
| return 0; |
| |
| #define LBUFSIZE 1200UL |
| lbuf = kmalloc(LBUFSIZE, GFP_KERNEL); |
| if (!lbuf) |
| return 0; |
| |
| local_count = min(LBUFSIZE - 1, count); |
| if (copy_from_user(lbuf, buffer, local_count) != 0) { |
| kfree(lbuf); |
| return -EFAULT; |
| } |
| lbuf[local_count] = '\0'; |
| |
| ptr = strstr(lbuf, "Online devices"); |
| if (!ptr) |
| goto out; |
| ptr = strstr(ptr, "\n"); |
| if (!ptr) |
| goto out; |
| ptr++; |
| |
| if (strstr(ptr, "Waiting work element counts") == NULL) |
| goto out; |
| |
| for (j = 0; j < 64 && *ptr; ptr++) { |
| /* |
| * '0' for no device, '1' for PCICA, '2' for PCICC, |
| * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3, |
| * '5' for CEX2C and '6' for CEX2A' |
| * '7' for CEX3C and '8' for CEX3A |
| */ |
| if (*ptr >= '0' && *ptr <= '8') |
| j++; |
| else if (*ptr == 'd' || *ptr == 'D') |
| zcrypt_disable_card(j++); |
| else if (*ptr == 'e' || *ptr == 'E') |
| zcrypt_enable_card(j++); |
| else if (*ptr != ' ' && *ptr != '\t') |
| break; |
| } |
| out: |
| kfree(lbuf); |
| return count; |
| } |
| |
| static const struct file_operations zcrypt_proc_fops = { |
| .owner = THIS_MODULE, |
| .open = zcrypt_proc_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| .write = zcrypt_proc_write, |
| }; |
| |
| static int zcrypt_rng_device_count; |
| static u32 *zcrypt_rng_buffer; |
| static int zcrypt_rng_buffer_index; |
| static DEFINE_MUTEX(zcrypt_rng_mutex); |
| |
| static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data) |
| { |
| int rc; |
| |
| /* |
| * We don't need locking here because the RNG API guarantees serialized |
| * read method calls. |
| */ |
| if (zcrypt_rng_buffer_index == 0) { |
| rc = zcrypt_rng((char *) zcrypt_rng_buffer); |
| /* on failure: retry once again after a requested rescan */ |
| if ((rc == -ENODEV) && (zcrypt_process_rescan())) |
| rc = zcrypt_rng((char *) zcrypt_rng_buffer); |
| if (rc < 0) |
| return -EIO; |
| zcrypt_rng_buffer_index = rc / sizeof *data; |
| } |
| *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index]; |
| return sizeof *data; |
| } |
| |
| static struct hwrng zcrypt_rng_dev = { |
| .name = "zcrypt", |
| .data_read = zcrypt_rng_data_read, |
| }; |
| |
| static int zcrypt_rng_device_add(void) |
| { |
| int rc = 0; |
| |
| mutex_lock(&zcrypt_rng_mutex); |
| if (zcrypt_rng_device_count == 0) { |
| zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL); |
| if (!zcrypt_rng_buffer) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| zcrypt_rng_buffer_index = 0; |
| rc = hwrng_register(&zcrypt_rng_dev); |
| if (rc) |
| goto out_free; |
| zcrypt_rng_device_count = 1; |
| } else |
| zcrypt_rng_device_count++; |
| mutex_unlock(&zcrypt_rng_mutex); |
| return 0; |
| |
| out_free: |
| free_page((unsigned long) zcrypt_rng_buffer); |
| out: |
| mutex_unlock(&zcrypt_rng_mutex); |
| return rc; |
| } |
| |
| static void zcrypt_rng_device_remove(void) |
| { |
| mutex_lock(&zcrypt_rng_mutex); |
| zcrypt_rng_device_count--; |
| if (zcrypt_rng_device_count == 0) { |
| hwrng_unregister(&zcrypt_rng_dev); |
| free_page((unsigned long) zcrypt_rng_buffer); |
| } |
| mutex_unlock(&zcrypt_rng_mutex); |
| } |
| |
| int __init zcrypt_debug_init(void) |
| { |
| debugfs_root = debugfs_create_dir("zcrypt", NULL); |
| |
| zcrypt_dbf_common = debug_register("zcrypt_common", 1, 1, 16); |
| debug_register_view(zcrypt_dbf_common, &debug_hex_ascii_view); |
| debug_set_level(zcrypt_dbf_common, DBF_ERR); |
| |
| zcrypt_dbf_devices = debug_register("zcrypt_devices", 1, 1, 16); |
| debug_register_view(zcrypt_dbf_devices, &debug_hex_ascii_view); |
| debug_set_level(zcrypt_dbf_devices, DBF_ERR); |
| |
| return 0; |
| } |
| |
| void zcrypt_debug_exit(void) |
| { |
| debugfs_remove(debugfs_root); |
| if (zcrypt_dbf_common) |
| debug_unregister(zcrypt_dbf_common); |
| if (zcrypt_dbf_devices) |
| debug_unregister(zcrypt_dbf_devices); |
| } |
| |
| /** |
| * zcrypt_api_init(): Module initialization. |
| * |
| * The module initialization code. |
| */ |
| int __init zcrypt_api_init(void) |
| { |
| int rc; |
| |
| rc = zcrypt_debug_init(); |
| if (rc) |
| goto out; |
| |
| atomic_set(&zcrypt_rescan_req, 0); |
| |
| /* Register the request sprayer. */ |
| rc = misc_register(&zcrypt_misc_device); |
| if (rc < 0) |
| goto out; |
| |
| /* Set up the proc file system */ |
| zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL, &zcrypt_proc_fops); |
| if (!zcrypt_entry) { |
| rc = -ENOMEM; |
| goto out_misc; |
| } |
| |
| return 0; |
| |
| out_misc: |
| misc_deregister(&zcrypt_misc_device); |
| out: |
| return rc; |
| } |
| |
| /** |
| * zcrypt_api_exit(): Module termination. |
| * |
| * The module termination code. |
| */ |
| void zcrypt_api_exit(void) |
| { |
| remove_proc_entry("driver/z90crypt", NULL); |
| misc_deregister(&zcrypt_misc_device); |
| zcrypt_debug_exit(); |
| } |
| |
| module_init(zcrypt_api_init); |
| module_exit(zcrypt_api_exit); |