From: Joonyoung Shim Date: Tue, 29 Jan 2013 08:00:09 +0000 (+0900) Subject: misc: add global lock driver for TIZEN X-Git-Tag: submit/tizen/20150416.081342~76 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=08537baa787bf9ec37f69511061344b5c35e8dc5;p=platform%2Fkernel%2Flinux-exynos.git misc: add global lock driver for TIZEN This is the driver for tizen global lock feature for TIZEN specific and will be removed if dma fence feature is enabled. Signed-off-by: Joonyoung Shim --- diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 006242c8bca0..112bc8459887 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -506,6 +506,11 @@ config SRAM the genalloc API. It is supposed to be used for small on-chip SRAM areas found on many SoCs. +config TIZEN_GLOBAL_LOCK + bool "Tizen Global Lock" + help + This supports global lock feature for Tizen. + config VEXPRESS_SYSCFG bool "Versatile Express System Configuration driver" depends on VEXPRESS_CONFIG diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 7d5c4cd118c4..c63202d10b83 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_INTEL_MEI) += mei/ obj-$(CONFIG_VMWARE_VMCI) += vmw_vmci/ obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lattice-ecp3-config.o obj-$(CONFIG_SRAM) += sram.o +obj-$(CONFIG_TIZEN_GLOBAL_LOCK) += tizen_global_lock.o obj-y += mic/ obj-$(CONFIG_GENWQE) += genwqe/ obj-$(CONFIG_ECHO) += echo/ diff --git a/drivers/misc/tizen_global_lock.c b/drivers/misc/tizen_global_lock.c new file mode 100644 index 000000000000..95cd0400c698 --- /dev/null +++ b/drivers/misc/tizen_global_lock.c @@ -0,0 +1,840 @@ +/* + * Copyright (C) 2013 Samsung Electronics Co.Ltd + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "tizen_global_lock.h" + +#define TGL_WARN(x, y...) pr_warn("(%d,%d)(%s):%d " x "\n", \ + current->tgid, current->pid, \ + __func__, __LINE__, ##y) +#define TGL_INFO(x, y...) pr_info(x, ##y) +#define TGL_LOG(x, y...) +#define TGL_DEBUG(x, y...) + +static struct tgl_global { + int major; + struct class *class; + struct device *device; + void *locks; /* global lock table */ + int refcnt; /* ref count of tgl_global */ + struct mutex mutex; +} tgl_global; + +struct tgl_session_data { + void *inited_locks; /* per session initialized locks */ + void *locked_locks; /* per session locked locks */ +}; + +struct tgl_lock { + unsigned int key; /* key of this lock */ + unsigned int timeout_ms; /* timeout in ms */ + unsigned int refcnt; /* ref count */ + wait_queue_head_t waiting_queue; /* waiting queue */ + struct list_head waiting_list; /* waiting list */ + struct mutex waiting_list_mutex; + unsigned int locked; /* flag if is locked */ + unsigned int owner; /* session data */ + + struct mutex data_mutex; + unsigned int user_data1; + unsigned int user_data2; + + pid_t owner_pid; + pid_t owner_tid; +}; + +#define TGL_HASH_BITS 4 +#define TGL_HASH_ENTRIES (1 << TGL_HASH_BITS) + +struct tgl_hash_head { + struct hlist_head head; /* hash_head */ + struct mutex mutex; +}; + +struct tgl_hash_node { + unsigned int key; /* must be same as lock->key */ + struct tgl_lock *lock; /* lock object */ + struct hlist_node node; /* hash node */ +}; + +static const char tgl_dev_name[] = "tgl"; + +/* find the tgl_lock object with key in the hash table */ +static struct tgl_hash_node *tgl_hash_get_node(struct tgl_hash_head *hash, + unsigned int key) +{ + struct tgl_hash_head *hash_head = &hash[hash_32(key, TGL_HASH_BITS)]; + struct tgl_hash_node *hash_node = NULL; + struct tgl_hash_node *found = NULL; + + struct hlist_head *head = &hash_head->head; + + TGL_LOG("key %d", key); + + mutex_lock(&hash_head->mutex); + hlist_for_each_entry(hash_node, head, node) { + if (hash_node->key == key) { + found = hash_node; + break; + } + } + mutex_unlock(&hash_head->mutex); + + TGL_LOG("hash_node: %p", hash_node); + + return found; +} + +/* insert the hash entry */ +static struct tgl_hash_node *tgl_hash_insert_node(struct tgl_hash_head *hash, + unsigned int key) +{ + struct tgl_hash_head *hash_head = &hash[hash_32(key, TGL_HASH_BITS)]; + struct tgl_hash_node *hash_node; + struct hlist_head *head = &hash_head->head; + + TGL_LOG("key %d", key); + + hash_node = kzalloc(sizeof(struct tgl_hash_node), GFP_KERNEL); + if (hash_node == NULL) + return NULL; + + INIT_HLIST_NODE(&hash_node->node); + mutex_lock(&hash_head->mutex); + hlist_add_head(&hash_node->node, head); + mutex_unlock(&hash_head->mutex); + + hash_node->key = key; + + TGL_LOG(); + + return hash_node; +} + +/* remove the hash entry */ +static int tgl_hash_remove_node(struct tgl_hash_head *hash, unsigned int key) +{ + struct tgl_hash_head *hash_head = &hash[hash_32(key, TGL_HASH_BITS)]; + struct tgl_hash_node *hash_node; + struct hlist_head *head = &hash_head->head; + int err = -ENOENT; + + TGL_LOG("key %d", key); + + mutex_lock(&hash_head->mutex); + hlist_for_each_entry(hash_node, head, node) { + if (hash_node->key == key) { + hlist_del(&hash_node->node); + kfree(hash_node); + err = 0; + break; + } + } + mutex_unlock(&hash_head->mutex); + + TGL_LOG(); + + return err; +} + +static int tgl_hash_cleanup_nodes(struct tgl_hash_head *hash, + int (*lock_cleanup_func)(struct tgl_lock *)) +{ + struct tgl_hash_node *hash_node; + struct hlist_head *head; + int i; + int err = 0; + + TGL_LOG(); + + for (i = 0; i < TGL_HASH_ENTRIES; i++) { + head = &hash[i].head; + mutex_lock(&hash->mutex); + while (!hlist_empty(head)) { + hash_node = hlist_entry(head->first, + struct tgl_hash_node, node); + if (lock_cleanup_func(hash_node->lock) < 0) + err = -EBADRQC; + hlist_del(&hash_node->node); + kfree(hash_node); + } + mutex_unlock(&hash->mutex); + } + + TGL_LOG(); + + return err; +} + +/* allocate the hash table */ +static struct tgl_hash_head *tgl_hash_create_table(void) +{ + struct tgl_hash_head *hash; + int i; + + TGL_LOG(); + + hash = kzalloc(sizeof(*hash) * TGL_HASH_ENTRIES, GFP_KERNEL); + if (hash == NULL) + return NULL; + + for (i = 0; i < TGL_HASH_ENTRIES; i++) { + INIT_HLIST_HEAD(&hash[i].head); + mutex_init(&hash[i].mutex); + } + + TGL_LOG(); + + return hash; +} + +/* release the hash table */ +static void tgl_hash_destroy_table(struct tgl_hash_head *hash) +{ + TGL_LOG(); + + kfree(hash); + + TGL_LOG(); +} + +static struct tgl_lock *tgl_get_lock(void *locks, unsigned int key) +{ + struct tgl_hash_node *hash_node; + + hash_node = tgl_hash_get_node((struct tgl_hash_head *)locks, key); + if (hash_node == NULL) + return NULL; + + return hash_node->lock; +} + +static int tgl_insert_lock(void *locks, struct tgl_lock *lock) +{ + struct tgl_hash_node *hash_node; + + hash_node = tgl_hash_insert_node((struct tgl_hash_head *)locks, + lock->key); + if (hash_node == NULL) + return -ENOMEM; + hash_node->lock = lock; + + return 0; +} + +static int tgl_remove_lock(void *locks, unsigned int key) +{ + return tgl_hash_remove_node((struct tgl_hash_head *)locks, key); +} + +static int tgl_cleanup_locks(void *locks, + int (*lock_cleanup_func)(struct tgl_lock *)) +{ + return tgl_hash_cleanup_nodes((struct tgl_hash_head *)locks, + lock_cleanup_func); +} + +static void *tgl_create_locks(void) +{ + return (void *)tgl_hash_create_table(); +} + +static void tgl_destroy_locks(void *locks) +{ + tgl_hash_destroy_table((struct tgl_hash_head *)locks); +} + +static int tgl_lock_lock(struct tgl_session_data *session_data, + unsigned int key) +{ + struct tgl_lock *lock; + struct list_head waiting_entry; + unsigned long jiffies; + long ret; + + TGL_LOG("key: %d", key); + + mutex_lock(&tgl_global.mutex); + lock = tgl_get_lock(tgl_global.locks, key); + if (lock == NULL) { + if (tgl_get_lock(session_data->inited_locks, key)) + tgl_remove_lock(session_data->inited_locks, key); + + if (tgl_get_lock(session_data->locked_locks, key)) + tgl_remove_lock(session_data->locked_locks, key); + mutex_unlock(&tgl_global.mutex); + TGL_WARN("lock is not in the global locks"); + return -ENOENT; + } + + lock = tgl_get_lock(session_data->inited_locks, key); + if (lock == NULL) { + mutex_unlock(&tgl_global.mutex); + TGL_WARN("lock is not in the inited locks"); + return -ENOENT; + } + mutex_unlock(&tgl_global.mutex); + + INIT_LIST_HEAD(&waiting_entry); + mutex_lock(&lock->data_mutex); + lock->refcnt++; + mutex_unlock(&lock->data_mutex); + mutex_lock(&lock->waiting_list_mutex); + list_add_tail(&waiting_entry, &lock->waiting_list); + mutex_unlock(&lock->waiting_list_mutex); + + jiffies = msecs_to_jiffies(lock->timeout_ms); + + TGL_LOG(); + + ret = wait_event_timeout(lock->waiting_queue, + ((lock->locked == 0) + && lock->waiting_list.next == &waiting_entry), + jiffies); + if (ret == 0) { + TGL_WARN("timed out, key: %d, owner(%d, %d)", + key, lock->owner_pid, lock->owner_tid); + mutex_lock(&lock->data_mutex); + lock->refcnt--; + mutex_unlock(&lock->data_mutex); + mutex_lock(&lock->waiting_list_mutex); + list_del(&waiting_entry); + mutex_unlock(&lock->waiting_list_mutex); + return -ETIMEDOUT; + } + + TGL_LOG(); + + mutex_lock(&lock->data_mutex); + lock->owner = (unsigned int)session_data; + lock->locked = 1; + lock->owner_pid = current->tgid; + lock->owner_tid = current->pid; + mutex_unlock(&lock->data_mutex); + + mutex_lock(&lock->waiting_list_mutex); + list_del(&waiting_entry); + mutex_unlock(&lock->waiting_list_mutex); + + /* add to the locked lock */ + tgl_insert_lock(session_data->locked_locks, lock); + + TGL_LOG(); + + return 0; +} + +static int _tgl_unlock_lock(struct tgl_lock *lock) +{ + TGL_LOG(); + + if (lock == NULL) { + TGL_WARN("lock == NULL"); + return -EBADRQC; + } + mutex_lock(&lock->data_mutex); + + if (lock->locked == 0) { + mutex_unlock(&lock->data_mutex); + TGL_WARN("tried to unlock not-locked lock"); + return -EBADRQC; + } + + lock->owner = 0; + lock->locked = 0; + lock->owner_pid = 0; + lock->owner_tid = 0; + lock->refcnt--; + + if (waitqueue_active(&lock->waiting_queue)) + wake_up(&lock->waiting_queue); + + mutex_unlock(&lock->data_mutex); + + TGL_LOG(); + + return 0; +} + +static int tgl_unlock_lock(struct tgl_session_data *session_data, + unsigned int key) +{ + struct tgl_lock *lock; + int err; + + TGL_LOG("key: %d", key); + + mutex_lock(&tgl_global.mutex); + lock = tgl_get_lock(tgl_global.locks, key); + if (lock == NULL) { + if (tgl_get_lock(session_data->inited_locks, key)) + tgl_remove_lock(session_data->inited_locks, key); + + if (tgl_get_lock(session_data->locked_locks, key)) + tgl_remove_lock(session_data->locked_locks, key); + mutex_unlock(&tgl_global.mutex); + TGL_WARN("lock is not in the global locks"); + return -ENOENT; + } + + lock = tgl_get_lock(session_data->inited_locks, key); + if (lock == NULL) { + mutex_unlock(&tgl_global.mutex); + TGL_WARN("lock is not in the inited locks"); + return -ENOENT; + } + mutex_unlock(&tgl_global.mutex); + + mutex_lock(&lock->data_mutex); + if (lock->owner != (unsigned int)session_data) { + mutex_unlock(&lock->data_mutex); + TGL_WARN("tried to unlock not-owned lock by calling session"); + return -EBADRQC; + } + mutex_unlock(&lock->data_mutex); + tgl_remove_lock(session_data->locked_locks, key); + err = _tgl_unlock_lock(lock); + if (err < 0) + TGL_WARN("_tgl_unlock_lock() failed"); + + if (err < 0) + TGL_WARN("tgl_remove_lock() failed"); + + TGL_LOG(); + + return err; +} + +static int tgl_init_lock(struct tgl_session_data *session_data, + struct tgl_attribute *attr) +{ + struct tgl_lock *lock; + int err; + + TGL_LOG("key: %d", attr->key); + + mutex_lock(&tgl_global.mutex); + + lock = tgl_get_lock(tgl_global.locks, attr->key); + if (lock == NULL) { + /* + * allocate and add to the global table if this is the first + * initialization + */ + lock = kzalloc(sizeof(struct tgl_lock), GFP_KERNEL); + if (lock == NULL) { + err = -ENOMEM; + goto out_unlock; + } + + lock->key = attr->key; + + err = tgl_insert_lock(tgl_global.locks, lock); + if (err < 0) + goto out_unlock; + + /* default timeout value is 16ms */ + lock->timeout_ms = attr->timeout_ms ? attr->timeout_ms : 16; + + init_waitqueue_head(&lock->waiting_queue); + INIT_LIST_HEAD(&lock->waiting_list); + mutex_init(&lock->waiting_list_mutex); + mutex_init(&lock->data_mutex); + } + mutex_lock(&lock->data_mutex); + lock->refcnt++; + mutex_unlock(&lock->data_mutex); + + /* add to the inited locks */ + err = tgl_insert_lock(session_data->inited_locks, lock); + +out_unlock: + + mutex_unlock(&tgl_global.mutex); + + TGL_LOG(); + + return err; +} + +static int _tgl_destroy_lock(struct tgl_lock *lock) +{ + int err; + + TGL_LOG(); + + if (lock == NULL) { + TGL_WARN("lock == NULL"); + return -EBADRQC; + } + + mutex_lock(&lock->data_mutex); + lock->refcnt--; + if (lock->refcnt == 0) { + mutex_unlock(&lock->data_mutex); + err = tgl_remove_lock(tgl_global.locks, lock->key); + if (err < 0) + return err; + + kfree(lock); + } else + mutex_unlock(&lock->data_mutex); + + TGL_LOG(); + + return 0; +} + +static int tgl_destroy_lock(struct tgl_session_data *session_data, + unsigned int key) +{ + struct tgl_lock *lock; + + int err; + + TGL_LOG(); + + mutex_lock(&tgl_global.mutex); + + lock = tgl_get_lock(tgl_global.locks, key); + if (lock == NULL) { + TGL_WARN("lock is not in the global locks"); + err = -ENOENT; + goto out_unlock; + } + if (!tgl_get_lock(session_data->inited_locks, key)) { + TGL_WARN("lock is not in the inited locks"); + err = -ENOENT; + goto out_unlock; + } + + /* check if lock is still locked */ + if (tgl_get_lock(session_data->locked_locks, key)) { + TGL_WARN("destroy failed. lock is still locked"); + err = -EBUSY; + goto out_unlock; + } + + err = _tgl_destroy_lock(lock); + if (err < 0) + goto out_unlock; + + /* remove from the inited lock */ + err = tgl_remove_lock(session_data->inited_locks, key); + if (err < 0) + goto out_unlock; + +out_unlock: + mutex_unlock(&tgl_global.mutex); + + TGL_LOG(); + + return err; +} + +static int tgl_set_data(struct tgl_session_data *session_data, + struct tgl_user_data *user_data) +{ + struct tgl_lock *lock; + unsigned int key = user_data->key; + + TGL_LOG("key: %d", key); + + mutex_lock(&tgl_global.mutex); + + lock = tgl_get_lock(tgl_global.locks, key); + if (lock == NULL) { + TGL_WARN("lock is not in the inited locks"); + mutex_unlock(&tgl_global.mutex); + return -ENOENT; + } + mutex_lock(&lock->data_mutex); + lock->user_data1 = user_data->data1; + lock->user_data2 = user_data->data2; + user_data->locked = lock->locked; + mutex_unlock(&lock->data_mutex); + mutex_unlock(&tgl_global.mutex); + + TGL_LOG(); + + return 0; +} + +static int tgl_get_data(struct tgl_session_data *session_data, + struct tgl_user_data *user_data) +{ + struct tgl_lock *lock; + unsigned int key = user_data->key; + + TGL_LOG("key: %d", key); + mutex_lock(&tgl_global.mutex); + + lock = tgl_get_lock(tgl_global.locks, key); + if (lock == NULL) { + TGL_WARN("lock is not in the inited locks"); + mutex_unlock(&tgl_global.mutex); + return -ENOENT; + } + mutex_lock(&lock->data_mutex); + user_data->data1 = lock->user_data1; + user_data->data2 = lock->user_data2; + user_data->locked = lock->locked; + mutex_unlock(&lock->data_mutex); + mutex_unlock(&tgl_global.mutex); + + TGL_LOG(); + + return 0; +} + +static void tgl_dump_locks(void) +{ + int i; + + TGL_INFO("TIZEN_GLOBAL_LOCK DUMP START\n"); + + mutex_lock(&tgl_global.mutex); + for (i = 0; i < TGL_HASH_ENTRIES; i++) { + struct tgl_hash_head *shead; + struct tgl_hash_node *snode; + struct hlist_head *hhead; + + shead = &((struct tgl_hash_head *)tgl_global.locks)[i]; + if (!shead) + continue; + mutex_lock(&shead->mutex); + hhead = &shead->head; + hlist_for_each_entry(snode, hhead, node) { + struct tgl_lock *lock = snode->lock; + + mutex_lock(&lock->data_mutex); + TGL_INFO("lock key: %d, refcnt: %d, pid: %d, tid: %d\n", + lock->key, lock->refcnt, + lock->owner_pid, lock->owner_tid); + mutex_unlock(&lock->data_mutex); + } + mutex_unlock(&shead->mutex); + } + mutex_unlock(&tgl_global.mutex); + + TGL_INFO("TIZEN_GLOBAL_LOCK DUMP END\n"); +} + +static long tgl_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + struct tgl_session_data *session_data = file->private_data; + int err = 0; + + TGL_LOG(); + + switch (cmd) { + case TGL_IOC_INIT_LOCK: + /* destroy lock with attribute */ + err = tgl_init_lock(session_data, (struct tgl_attribute *)arg); + break; + case TGL_IOC_DESTROY_LOCK: + /* destroy lock with id(=arg) */ + err = tgl_destroy_lock(session_data, (unsigned int)arg); + break; + case TGL_IOC_LOCK_LOCK: + /* lock lock with id(=arg) */ + err = tgl_lock_lock(session_data, (unsigned int)arg); + break; + case TGL_IOC_UNLOCK_LOCK: + /* unlock lock with id(=arg) */ + err = tgl_unlock_lock(session_data, (unsigned int)arg); + break; + case TGL_IOC_SET_DATA: + err = tgl_set_data(session_data, (struct tgl_user_data *)arg); + break; + case TGL_IOC_GET_DATA: + err = tgl_get_data(session_data, (struct tgl_user_data *)arg); + break; + case TGL_IOC_DUMP_LOCKS: + tgl_dump_locks(); + break; + default: + TGL_WARN("unknown type of ioctl command"); + break; + } + + TGL_LOG(); + + return err; +} + +static int tgl_open(struct inode *inode, struct file *file) +{ + struct tgl_session_data *session_data; + + TGL_LOG(); + + /* init per thread data using file->private_data*/ + session_data = kzalloc(sizeof(struct tgl_session_data), GFP_KERNEL); + if (session_data == NULL) + goto err_session_data; + + session_data->inited_locks = tgl_create_locks(); + if (session_data->inited_locks == NULL) + goto err_inited_locks; + + session_data->locked_locks = tgl_create_locks(); + if (session_data->locked_locks == NULL) + goto err_locked_locks; + + file->private_data = (void *)session_data; + + tgl_global.refcnt++; + + TGL_LOG(); + + return 0; + +err_locked_locks: + tgl_destroy_locks(session_data->inited_locks); +err_inited_locks: + kfree(session_data); +err_session_data: + TGL_WARN(); + return -ENOMEM; +} + +static int tgl_release(struct inode *inode, struct file *file) +{ + struct tgl_session_data *session_data = file->private_data; + + TGL_LOG(); + + mutex_lock(&tgl_global.mutex); + + /* clean up the locked locks */ + if (tgl_cleanup_locks(session_data->locked_locks, _tgl_unlock_lock)) + TGL_WARN("clean-up locked locks failed"); + + /* clean up the inited locks */ + if (tgl_cleanup_locks(session_data->inited_locks, _tgl_destroy_lock)) + TGL_WARN("clean-up inited locks failed"); + + /* clean up per thread data */ + file->private_data = NULL; + + tgl_destroy_locks(session_data->locked_locks); + tgl_destroy_locks(session_data->inited_locks); + + kfree(session_data); + + mutex_unlock(&tgl_global.mutex); + tgl_global.refcnt--; + if (tgl_global.refcnt == 0) { + /* destroy global lock table */ + tgl_destroy_locks(tgl_global.locks); + + device_destroy(tgl_global.class, MKDEV(tgl_global.major, 0)); + class_destroy(tgl_global.class); + unregister_chrdev(tgl_global.major, tgl_dev_name); + } + + TGL_LOG(); + + return 0; +} + +static const struct file_operations tgl_ops = { + .owner = THIS_MODULE, + .open = tgl_open, + .release = tgl_release, + .unlocked_ioctl = tgl_ioctl, +}; + +static int __init tgl_init(void) +{ + int err; + + TGL_LOG(); + + memset(&tgl_global, 0, sizeof(struct tgl_global)); + + tgl_global.major = TGL_MAJOR; + err = register_chrdev(tgl_global.major, tgl_dev_name, &tgl_ops); + if (err < 0) + goto err_register_chrdev; + + tgl_global.class = class_create(THIS_MODULE, tgl_dev_name); + if (IS_ERR(tgl_global.class)) { + err = PTR_ERR(tgl_global.class); + goto err_class_create; + } + + tgl_global.device = device_create(tgl_global.class, NULL, + MKDEV(tgl_global.major, 0), NULL, tgl_dev_name); + if (IS_ERR(tgl_global.device)) { + err = PTR_ERR(tgl_global.device); + goto err_device_create; + } + + /* create the global lock table */ + tgl_global.locks = tgl_create_locks(); + if (tgl_global.locks == NULL) { + err = -ENOMEM; + goto err_create_locks; + } + + mutex_init(&tgl_global.mutex); + + tgl_global.refcnt++; + + TGL_LOG(); + + return 0; + +err_create_locks: +err_device_create: + class_unregister(tgl_global.class); +err_class_create: + unregister_chrdev(tgl_global.major, tgl_dev_name); +err_register_chrdev: + TGL_WARN(); + return err; +} + +void tgl_exit(void) +{ + TGL_LOG(); + + tgl_global.refcnt--; + if (tgl_global.refcnt == 0) { + mutex_destroy(&tgl_global.mutex); + + /* destroy global lock table */ + tgl_destroy_locks(tgl_global.locks); + + device_destroy(tgl_global.class, MKDEV(tgl_global.major, 0)); + class_destroy(tgl_global.class); + unregister_chrdev(tgl_global.major, tgl_dev_name); + } + + TGL_LOG(); +} + +module_init(tgl_init); +module_exit(tgl_exit); + +MODULE_LICENSE("GPL"); diff --git a/drivers/misc/tizen_global_lock.h b/drivers/misc/tizen_global_lock.h new file mode 100644 index 000000000000..38eb5fcd0c08 --- /dev/null +++ b/drivers/misc/tizen_global_lock.h @@ -0,0 +1,53 @@ +/* + * Copyright (C) 2013 Samsung Electronics Co.Ltd + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __TIZEN_GLOBAL_LOCK_H__ +#define __TIZEN_GLOBAL_LOCK_H__ + +#include + +#define TGL_IOC_BASE 0x32 +#define TGL_MAJOR 224 + +struct tgl_attribute { + unsigned int key; + unsigned int timeout_ms; +}; + +struct tgl_user_data { + unsigned int key; + unsigned int data1; + unsigned int data2; + unsigned int locked; +}; + +enum tgl_ioctls { + TGL_INIT_LOCK = 1, + TGL_DESTROY_LOCK, + TGL_LOCK_LOCK, + TGL_UNLOCK_LOCK, + TGL_SET_DATA, + TGL_GET_DATA, + TGL_DUMP_LOCKS, +}; + +#define TGL_IOC_INIT_LOCK _IOW(TGL_IOC_BASE, TGL_INIT_LOCK, \ + struct tgl_attribute *) +#define TGL_IOC_DESTROY_LOCK _IOW(TGL_IOC_BASE, TGL_DESTROY_LOCK, \ + unsigned int) +#define TGL_IOC_LOCK_LOCK _IOW(TGL_IOC_BASE, TGL_LOCK_LOCK, \ + unsigned int) +#define TGL_IOC_UNLOCK_LOCK _IOW(TGL_IOC_BASE, TGL_UNLOCK_LOCK, \ + unsigned int) +#define TGL_IOC_SET_DATA _IOW(TGL_IOC_BASE, TGL_SET_DATA, \ + struct tgl_user_data *) +#define TGL_IOC_GET_DATA _IOW(TGL_IOC_BASE, TGL_GET_DATA, \ + struct tgl_user_data *) +#define TGL_IOC_DUMP_LOCKS _IOW(TGL_IOC_BASE, TGL_DUMP_LOCKS, void *) + +#endif /* __TIZEN_GLOBAL_LOCK_H__ */