diff options
Diffstat (limited to 'drivers/base/sync.c')
| -rw-r--r-- | drivers/base/sync.c | 1016 |
1 files changed, 0 insertions, 1016 deletions
diff --git a/drivers/base/sync.c b/drivers/base/sync.c deleted file mode 100644 index cefd6b9f4832..000000000000 --- a/drivers/base/sync.c +++ /dev/null @@ -1,1016 +0,0 @@ -/* - * drivers/base/sync.c - * - * Copyright (C) 2012 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/debugfs.h> -#include <linux/export.h> -#include <linux/file.h> -#include <linux/fs.h> -#include <linux/kernel.h> -#include <linux/poll.h> -#include <linux/sched.h> -#include <linux/seq_file.h> -#include <linux/slab.h> -#include <linux/sync.h> -#include <linux/uaccess.h> - -#include <linux/anon_inodes.h> - -#define CREATE_TRACE_POINTS -#include <trace/events/sync.h> - -static void sync_fence_signal_pt(struct sync_pt *pt); -static int _sync_pt_has_signaled(struct sync_pt *pt); -static void sync_fence_free(struct kref *kref); -static void sync_dump(void); - -static LIST_HEAD(sync_timeline_list_head); -static DEFINE_SPINLOCK(sync_timeline_list_lock); - -static LIST_HEAD(sync_fence_list_head); -static DEFINE_SPINLOCK(sync_fence_list_lock); - -struct sync_timeline *sync_timeline_create(const struct sync_timeline_ops *ops, - int size, const char *name) -{ - struct sync_timeline *obj; - unsigned long flags; - - if (size < sizeof(struct sync_timeline)) - return NULL; - - obj = kzalloc(size, GFP_KERNEL); - if (obj == NULL) - return NULL; - - kref_init(&obj->kref); - obj->ops = ops; - strlcpy(obj->name, name, sizeof(obj->name)); - - INIT_LIST_HEAD(&obj->child_list_head); - spin_lock_init(&obj->child_list_lock); - - INIT_LIST_HEAD(&obj->active_list_head); - spin_lock_init(&obj->active_list_lock); - - spin_lock_irqsave(&sync_timeline_list_lock, flags); - list_add_tail(&obj->sync_timeline_list, &sync_timeline_list_head); - spin_unlock_irqrestore(&sync_timeline_list_lock, flags); - - return obj; -} -EXPORT_SYMBOL(sync_timeline_create); - -static void sync_timeline_free(struct kref *kref) -{ - struct sync_timeline *obj = - container_of(kref, struct sync_timeline, kref); - unsigned long flags; - - if (obj->ops->release_obj) - obj->ops->release_obj(obj); - - spin_lock_irqsave(&sync_timeline_list_lock, flags); - list_del(&obj->sync_timeline_list); - spin_unlock_irqrestore(&sync_timeline_list_lock, flags); - - kfree(obj); -} - -void sync_timeline_destroy(struct sync_timeline *obj) -{ - obj->destroyed = true; - - /* - * If this is not the last reference, signal any children - * that their parent is going away. - */ - - if (!kref_put(&obj->kref, sync_timeline_free)) - sync_timeline_signal(obj); -} -EXPORT_SYMBOL(sync_timeline_destroy); - -static void sync_timeline_add_pt(struct sync_timeline *obj, struct sync_pt *pt) -{ - unsigned long flags; - - pt->parent = obj; - - spin_lock_irqsave(&obj->child_list_lock, flags); - list_add_tail(&pt->child_list, &obj->child_list_head); - spin_unlock_irqrestore(&obj->child_list_lock, flags); -} - -static void sync_timeline_remove_pt(struct sync_pt *pt) -{ - struct sync_timeline *obj = pt->parent; - unsigned long flags; - - spin_lock_irqsave(&obj->active_list_lock, flags); - if (!list_empty(&pt->active_list)) - list_del_init(&pt->active_list); - spin_unlock_irqrestore(&obj->active_list_lock, flags); - - spin_lock_irqsave(&obj->child_list_lock, flags); - if (!list_empty(&pt->child_list)) { - list_del_init(&pt->child_list); - } - spin_unlock_irqrestore(&obj->child_list_lock, flags); -} - -void sync_timeline_signal(struct sync_timeline *obj) -{ - unsigned long flags; - LIST_HEAD(signaled_pts); - struct list_head *pos, *n; - - trace_sync_timeline(obj); - - spin_lock_irqsave(&obj->active_list_lock, flags); - - list_for_each_safe(pos, n, &obj->active_list_head) { - struct sync_pt *pt = - container_of(pos, struct sync_pt, active_list); - - if (_sync_pt_has_signaled(pt)) { - list_del_init(pos); - list_add(&pt->signaled_list, &signaled_pts); - kref_get(&pt->fence->kref); - } - } - - spin_unlock_irqrestore(&obj->active_list_lock, flags); - - list_for_each_safe(pos, n, &signaled_pts) { - struct sync_pt *pt = - container_of(pos, struct sync_pt, signaled_list); - - list_del_init(pos); - sync_fence_signal_pt(pt); - kref_put(&pt->fence->kref, sync_fence_free); - } -} -EXPORT_SYMBOL(sync_timeline_signal); - -struct sync_pt *sync_pt_create(struct sync_timeline *parent, int size) -{ - struct sync_pt *pt; - - if (size < sizeof(struct sync_pt)) - return NULL; - - pt = kzalloc(size, GFP_KERNEL); - if (pt == NULL) - return NULL; - - INIT_LIST_HEAD(&pt->active_list); - kref_get(&parent->kref); - sync_timeline_add_pt(parent, pt); - - return pt; -} -EXPORT_SYMBOL(sync_pt_create); - -void sync_pt_free(struct sync_pt *pt) -{ - if (pt->parent->ops->free_pt) - pt->parent->ops->free_pt(pt); - - sync_timeline_remove_pt(pt); - - kref_put(&pt->parent->kref, sync_timeline_free); - - kfree(pt); -} -EXPORT_SYMBOL(sync_pt_free); - -/* call with pt->parent->active_list_lock held */ -static int _sync_pt_has_signaled(struct sync_pt *pt) -{ - int old_status = pt->status; - - if (!pt->status) - pt->status = pt->parent->ops->has_signaled(pt); - - if (!pt->status && pt->parent->destroyed) - pt->status = -ENOENT; - - if (pt->status != old_status) - pt->timestamp = ktime_get(); - - return pt->status; -} - -static struct sync_pt *sync_pt_dup(struct sync_pt *pt) -{ - return pt->parent->ops->dup(pt); -} - -/* Adds a sync pt to the active queue. Called when added to a fence */ -static void sync_pt_activate(struct sync_pt *pt) -{ - struct sync_timeline *obj = pt->parent; - unsigned long flags; - int err; - - spin_lock_irqsave(&obj->active_list_lock, flags); - - err = _sync_pt_has_signaled(pt); - if (err != 0) - goto out; - - list_add_tail(&pt->active_list, &obj->active_list_head); - -out: - spin_unlock_irqrestore(&obj->active_list_lock, flags); -} - -static int sync_fence_release(struct inode *inode, struct file *file); -static unsigned int sync_fence_poll(struct file *file, poll_table *wait); -static long sync_fence_ioctl(struct file *file, unsigned int cmd, - unsigned long arg); - - -static const struct file_operations sync_fence_fops = { - .release = sync_fence_release, - .poll = sync_fence_poll, - .unlocked_ioctl = sync_fence_ioctl, - .compat_ioctl = sync_fence_ioctl, -}; - -static struct sync_fence *sync_fence_alloc(const char *name) -{ - struct sync_fence *fence; - unsigned long flags; - - fence = kzalloc(sizeof(struct sync_fence), GFP_KERNEL); - if (fence == NULL) - return NULL; - - fence->file = anon_inode_getfile("sync_fence", &sync_fence_fops, - fence, 0); - if (fence->file == NULL) - goto err; - - kref_init(&fence->kref); - strlcpy(fence->name, name, sizeof(fence->name)); - - INIT_LIST_HEAD(&fence->pt_list_head); - INIT_LIST_HEAD(&fence->waiter_list_head); - spin_lock_init(&fence->waiter_list_lock); - - init_waitqueue_head(&fence->wq); - - spin_lock_irqsave(&sync_fence_list_lock, flags); - list_add_tail(&fence->sync_fence_list, &sync_fence_list_head); - spin_unlock_irqrestore(&sync_fence_list_lock, flags); - - return fence; - -err: - kfree(fence); - return NULL; -} - -/* TODO: implement a create which takes more that one sync_pt */ -struct sync_fence *sync_fence_create(const char *name, struct sync_pt *pt) -{ - struct sync_fence *fence; - - if (pt->fence) - return NULL; - - fence = sync_fence_alloc(name); - if (fence == NULL) - return NULL; - - pt->fence = fence; - list_add(&pt->pt_list, &fence->pt_list_head); - sync_pt_activate(pt); - - /* - * signal the fence in case pt was activated before - * sync_pt_activate(pt) was called - */ - sync_fence_signal_pt(pt); - - return fence; -} -EXPORT_SYMBOL(sync_fence_create); - -static int sync_fence_copy_pts(struct sync_fence *dst, struct sync_fence *src) -{ - struct list_head *pos; - - list_for_each(pos, &src->pt_list_head) { - struct sync_pt *orig_pt = - container_of(pos, struct sync_pt, pt_list); - struct sync_pt *new_pt = sync_pt_dup(orig_pt); - - if (new_pt == NULL) - return -ENOMEM; - - new_pt->fence = dst; - list_add(&new_pt->pt_list, &dst->pt_list_head); - } - - return 0; -} - -static int sync_fence_merge_pts(struct sync_fence *dst, struct sync_fence *src) -{ - struct list_head *src_pos, *dst_pos, *n; - - list_for_each(src_pos, &src->pt_list_head) { - struct sync_pt *src_pt = - container_of(src_pos, struct sync_pt, pt_list); - bool collapsed = false; - - list_for_each_safe(dst_pos, n, &dst->pt_list_head) { - struct sync_pt *dst_pt = - container_of(dst_pos, struct sync_pt, pt_list); - /* collapse two sync_pts on the same timeline - * to a single sync_pt that will signal at - * the later of the two - */ - if (dst_pt->parent == src_pt->parent) { - if (dst_pt->parent->ops->compare(dst_pt, src_pt) == -1) { - struct sync_pt *new_pt = - sync_pt_dup(src_pt); - if (new_pt == NULL) - return -ENOMEM; - - new_pt->fence = dst; - list_replace(&dst_pt->pt_list, - &new_pt->pt_list); - sync_pt_free(dst_pt); - } - collapsed = true; - break; - } - } - - if (!collapsed) { - struct sync_pt *new_pt = sync_pt_dup(src_pt); - - if (new_pt == NULL) - return -ENOMEM; - - new_pt->fence = dst; - list_add(&new_pt->pt_list, &dst->pt_list_head); - } - } - - return 0; -} - -static void sync_fence_detach_pts(struct sync_fence *fence) -{ - struct list_head *pos, *n; - - list_for_each_safe(pos, n, &fence->pt_list_head) { - struct sync_pt *pt = container_of(pos, struct sync_pt, pt_list); - sync_timeline_remove_pt(pt); - } -} - -static void sync_fence_free_pts(struct sync_fence *fence) -{ - struct list_head *pos, *n; - - list_for_each_safe(pos, n, &fence->pt_list_head) { - struct sync_pt *pt = container_of(pos, struct sync_pt, pt_list); - sync_pt_free(pt); - } -} - -struct sync_fence *sync_fence_fdget(int fd) -{ - struct file *file = fget(fd); - - if (file == NULL) - return NULL; - - if (file->f_op != &sync_fence_fops) - goto err; - - return file->private_data; - -err: - fput(file); - return NULL; -} -EXPORT_SYMBOL(sync_fence_fdget); - -void sync_fence_put(struct sync_fence *fence) -{ - fput(fence->file); -} -EXPORT_SYMBOL(sync_fence_put); - -void sync_fence_install(struct sync_fence *fence, int fd) -{ - fd_install(fd, fence->file); -} -EXPORT_SYMBOL(sync_fence_install); - -static int sync_fence_get_status(struct sync_fence *fence) -{ - struct list_head *pos; - int status = 1; - - list_for_each(pos, &fence->pt_list_head) { - struct sync_pt *pt = container_of(pos, struct sync_pt, pt_list); - int pt_status = pt->status; - - if (pt_status < 0) { - status = pt_status; - break; - } else if (status == 1) { - status = pt_status; - } - } - - return status; -} - -struct sync_fence *sync_fence_merge(const char *name, - struct sync_fence *a, struct sync_fence *b) -{ - struct sync_fence *fence; - struct list_head *pos; - int err; - - fence = sync_fence_alloc(name); - if (fence == NULL) - return NULL; - - err = sync_fence_copy_pts(fence, a); - if (err < 0) - goto err; - - err = sync_fence_merge_pts(fence, b); - if (err < 0) - goto err; - - list_for_each(pos, &fence->pt_list_head) { - struct sync_pt *pt = - container_of(pos, struct sync_pt, pt_list); - sync_pt_activate(pt); - } - - /* - * signal the fence in case one of it's pts were activated before - * they were activated - */ - sync_fence_signal_pt(list_first_entry(&fence->pt_list_head, - struct sync_pt, - pt_list)); - - return fence; -err: - sync_fence_free_pts(fence); - kfree(fence); - return NULL; -} -EXPORT_SYMBOL(sync_fence_merge); - -static void sync_fence_signal_pt(struct sync_pt *pt) -{ - LIST_HEAD(signaled_waiters); - struct sync_fence *fence = pt->fence; - struct list_head *pos; - struct list_head *n; - unsigned long flags; - int status; - - status = sync_fence_get_status(fence); - - spin_lock_irqsave(&fence->waiter_list_lock, flags); - /* - * this should protect against two threads racing on the signaled - * false -> true transition - */ - if (status && !fence->status) { - list_for_each_safe(pos, n, &fence->waiter_list_head) - list_move(pos, &signaled_waiters); - - fence->status = status; - } else { - status = 0; - } - spin_unlock_irqrestore(&fence->waiter_list_lock, flags); - - if (status) { - list_for_each_safe(pos, n, &signaled_waiters) { - struct sync_fence_waiter *waiter = - container_of(pos, struct sync_fence_waiter, - waiter_list); - - list_del(pos); - waiter->callback(fence, waiter); - } - wake_up(&fence->wq); - } -} - -int sync_fence_wait_async(struct sync_fence *fence, - struct sync_fence_waiter *waiter) -{ - unsigned long flags; - int err = 0; - - spin_lock_irqsave(&fence->waiter_list_lock, flags); - - if (fence->status) { - err = fence->status; - goto out; - } - - list_add_tail(&waiter->waiter_list, &fence->waiter_list_head); -out: - spin_unlock_irqrestore(&fence->waiter_list_lock, flags); - - return err; -} -EXPORT_SYMBOL(sync_fence_wait_async); - -int sync_fence_cancel_async(struct sync_fence *fence, - struct sync_fence_waiter *waiter) -{ - struct list_head *pos; - struct list_head *n; - unsigned long flags; - int ret = -ENOENT; - - spin_lock_irqsave(&fence->waiter_list_lock, flags); - /* - * Make sure waiter is still in waiter_list because it is possible for - * the waiter to be removed from the list while the callback is still - * pending. - */ - list_for_each_safe(pos, n, &fence->waiter_list_head) { - struct sync_fence_waiter *list_waiter = - container_of(pos, struct sync_fence_waiter, - waiter_list); - if (list_waiter == waiter) { - list_del(pos); - ret = 0; - break; - } - } - spin_unlock_irqrestore(&fence->waiter_list_lock, flags); - return ret; -} -EXPORT_SYMBOL(sync_fence_cancel_async); - -static bool sync_fence_check(struct sync_fence *fence) -{ - /* - * Make sure that reads to fence->status are ordered with the - * wait queue event triggering - */ - smp_rmb(); - return fence->status != 0; -} - -int sync_fence_wait(struct sync_fence *fence, long timeout) -{ - int err = 0; - struct sync_pt *pt; - - trace_sync_wait(fence, 1); - list_for_each_entry(pt, &fence->pt_list_head, pt_list) - trace_sync_pt(pt); - - if (timeout > 0) { - timeout = msecs_to_jiffies(timeout); - err = wait_event_interruptible_timeout(fence->wq, - sync_fence_check(fence), - timeout); - } else if (timeout < 0) { - err = wait_event_interruptible(fence->wq, - sync_fence_check(fence)); - } - trace_sync_wait(fence, 0); - - if (err < 0) - return err; - - if (fence->status < 0) { - pr_info("fence error %d on [%p]\n", fence->status, fence); - sync_dump(); - return fence->status; - } - - if (fence->status == 0) { - if (timeout > 0) { - pr_info("fence timeout on [%p] after %dms\n", fence, - jiffies_to_msecs(timeout)); - sync_dump(); - } - return -ETIME; - } - - return 0; -} -EXPORT_SYMBOL(sync_fence_wait); - -static void sync_fence_free(struct kref *kref) -{ - struct sync_fence *fence = container_of(kref, struct sync_fence, kref); - - sync_fence_free_pts(fence); - - kfree(fence); -} - -static int sync_fence_release(struct inode *inode, struct file *file) -{ - struct sync_fence *fence = file->private_data; - unsigned long flags; - - /* - * We need to remove all ways to access this fence before droping - * our ref. - * - * start with its membership in the global fence list - */ - spin_lock_irqsave(&sync_fence_list_lock, flags); - list_del(&fence->sync_fence_list); - spin_unlock_irqrestore(&sync_fence_list_lock, flags); - - /* - * remove its pts from their parents so that sync_timeline_signal() - * can't reference the fence. - */ - sync_fence_detach_pts(fence); - - kref_put(&fence->kref, sync_fence_free); - - return 0; -} - -static unsigned int sync_fence_poll(struct file *file, poll_table *wait) -{ - struct sync_fence *fence = file->private_data; - - poll_wait(file, &fence->wq, wait); - - /* - * Make sure that reads to fence->status are ordered with the - * wait queue event triggering - */ - smp_rmb(); - - if (fence->status == 1) - return POLLIN; - else if (fence->status < 0) - return POLLERR; - else - return 0; -} - -static long sync_fence_ioctl_wait(struct sync_fence *fence, unsigned long arg) -{ - __s32 value; - - if (copy_from_user(&value, (void __user *)arg, sizeof(value))) - return -EFAULT; - - return sync_fence_wait(fence, value); -} - -static long sync_fence_ioctl_merge(struct sync_fence *fence, unsigned long arg) -{ - int fd = get_unused_fd(); - int err; - struct sync_fence *fence2, *fence3; - struct sync_merge_data data; - - if (fd < 0) - return fd; - - if (copy_from_user(&data, (void __user *)arg, sizeof(data))) { - err = -EFAULT; - goto err_put_fd; - } - - fence2 = sync_fence_fdget(data.fd2); - if (fence2 == NULL) { - err = -ENOENT; - goto err_put_fd; - } - - data.name[sizeof(data.name) - 1] = '\0'; - fence3 = sync_fence_merge(data.name, fence, fence2); - if (fence3 == NULL) { - err = -ENOMEM; - goto err_put_fence2; - } - - data.fence = fd; - if (copy_to_user((void __user *)arg, &data, sizeof(data))) { - err = -EFAULT; - goto err_put_fence3; - } - - sync_fence_install(fence3, fd); - sync_fence_put(fence2); - return 0; - -err_put_fence3: - sync_fence_put(fence3); - -err_put_fence2: - sync_fence_put(fence2); - -err_put_fd: - put_unused_fd(fd); - return err; -} - -static int sync_fill_pt_info(struct sync_pt *pt, void *data, int size) -{ - struct sync_pt_info *info = data; - int ret; - - if (size < sizeof(struct sync_pt_info)) - return -ENOMEM; - - info->len = sizeof(struct sync_pt_info); - - if (pt->parent->ops->fill_driver_data) { - ret = pt->parent->ops->fill_driver_data(pt, info->driver_data, - size - sizeof(*info)); - if (ret < 0) - return ret; - - info->len += ret; - } - - strlcpy(info->obj_name, pt->parent->name, sizeof(info->obj_name)); - strlcpy(info->driver_name, pt->parent->ops->driver_name, - sizeof(info->driver_name)); - info->status = pt->status; - info->timestamp_ns = ktime_to_ns(pt->timestamp); - - return info->len; -} - -static long sync_fence_ioctl_fence_info(struct sync_fence *fence, - unsigned long arg) -{ - struct sync_fence_info_data *data; - struct list_head *pos; - __u32 size; - __u32 len = 0; - int ret; - - if (copy_from_user(&size, (void __user *)arg, sizeof(size))) - return -EFAULT; - - if (size < sizeof(struct sync_fence_info_data)) - return -EINVAL; - - if (size > 4096) - size = 4096; - - data = kzalloc(size, GFP_KERNEL); - if (data == NULL) - return -ENOMEM; - - strlcpy(data->name, fence->name, sizeof(data->name)); - data->status = fence->status; - len = sizeof(struct sync_fence_info_data); - - list_for_each(pos, &fence->pt_list_head) { - struct sync_pt *pt = - container_of(pos, struct sync_pt, pt_list); - - ret = sync_fill_pt_info(pt, (u8 *)data + len, size - len); - - if (ret < 0) - goto out; - - len += ret; - } - - data->len = len; - - if (copy_to_user((void __user *)arg, data, len)) - ret = -EFAULT; - else - ret = 0; - -out: - kfree(data); - - return ret; -} - -static long sync_fence_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - struct sync_fence *fence = file->private_data; - switch (cmd) { - case SYNC_IOC_WAIT: - return sync_fence_ioctl_wait(fence, arg); - - case SYNC_IOC_MERGE: - return sync_fence_ioctl_merge(fence, arg); - - case SYNC_IOC_FENCE_INFO: - return sync_fence_ioctl_fence_info(fence, arg); - - default: - return -ENOTTY; - } -} - -#ifdef CONFIG_DEBUG_FS -static const char *sync_status_str(int status) -{ - if (status > 0) - return "signaled"; - else if (status == 0) - return "active"; - else - return "error"; -} - -static void sync_print_pt(struct seq_file *s, struct sync_pt *pt, bool fence) -{ - int status = pt->status; - seq_printf(s, " %s%spt %s", - fence ? pt->parent->name : "", - fence ? "_" : "", - sync_status_str(status)); - if (pt->status) { - struct timeval tv = ktime_to_timeval(pt->timestamp); - seq_printf(s, "@%ld.%06ld", tv.tv_sec, tv.tv_usec); - } - - if (pt->parent->ops->timeline_value_str && - pt->parent->ops->pt_value_str) { - char value[64]; - pt->parent->ops->pt_value_str(pt, value, sizeof(value)); - seq_printf(s, ": %s", value); - if (fence) { - pt->parent->ops->timeline_value_str(pt->parent, value, - sizeof(value)); - seq_printf(s, " / %s", value); - } - } else if (pt->parent->ops->print_pt) { - seq_printf(s, ": "); - pt->parent->ops->print_pt(s, pt); - } - - seq_printf(s, "\n"); -} - -static void sync_print_obj(struct seq_file *s, struct sync_timeline *obj) -{ - struct list_head *pos; - unsigned long flags; - - seq_printf(s, "%s %s", obj->name, obj->ops->driver_name); - - if (obj->ops->timeline_value_str) { - char value[64]; - obj->ops->timeline_value_str(obj, value, sizeof(value)); - seq_printf(s, ": %s", value); - } else if (obj->ops->print_obj) { - seq_printf(s, ": "); - obj->ops->print_obj(s, obj); - } - - seq_printf(s, "\n"); - - spin_lock_irqsave(&obj->child_list_lock, flags); - list_for_each(pos, &obj->child_list_head) { - struct sync_pt *pt = - container_of(pos, struct sync_pt, child_list); - sync_print_pt(s, pt, false); - } - spin_unlock_irqrestore(&obj->child_list_lock, flags); -} - -static void sync_print_fence(struct seq_file *s, struct sync_fence *fence) -{ - struct list_head *pos; - unsigned long flags; - - seq_printf(s, "[%p] %s: %s\n", fence, fence->name, - sync_status_str(fence->status)); - - list_for_each(pos, &fence->pt_list_head) { - struct sync_pt *pt = - container_of(pos, struct sync_pt, pt_list); - sync_print_pt(s, pt, true); - } - - spin_lock_irqsave(&fence->waiter_list_lock, flags); - list_for_each(pos, &fence->waiter_list_head) { - struct sync_fence_waiter *waiter = - container_of(pos, struct sync_fence_waiter, - waiter_list); - - seq_printf(s, "waiter %pF\n", waiter->callback); - } - spin_unlock_irqrestore(&fence->waiter_list_lock, flags); -} - -static int sync_debugfs_show(struct seq_file *s, void *unused) -{ - unsigned long flags; - struct list_head *pos; - - seq_printf(s, "objs:\n--------------\n"); - - spin_lock_irqsave(&sync_timeline_list_lock, flags); - list_for_each(pos, &sync_timeline_list_head) { - struct sync_timeline *obj = - container_of(pos, struct sync_timeline, - sync_timeline_list); - - sync_print_obj(s, obj); - seq_printf(s, "\n"); - } - spin_unlock_irqrestore(&sync_timeline_list_lock, flags); - - seq_printf(s, "fences:\n--------------\n"); - - spin_lock_irqsave(&sync_fence_list_lock, flags); - list_for_each(pos, &sync_fence_list_head) { - struct sync_fence *fence = - container_of(pos, struct sync_fence, sync_fence_list); - - sync_print_fence(s, fence); - seq_printf(s, "\n"); - } - spin_unlock_irqrestore(&sync_fence_list_lock, flags); - return 0; -} - -static int sync_debugfs_open(struct inode *inode, struct file *file) -{ - return single_open(file, sync_debugfs_show, inode->i_private); -} - -static const struct file_operations sync_debugfs_fops = { - .open = sync_debugfs_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static __init int sync_debugfs_init(void) -{ - debugfs_create_file("sync", S_IRUGO, NULL, NULL, &sync_debugfs_fops); - return 0; -} -late_initcall(sync_debugfs_init); - -#define DUMP_CHUNK 256 -static char sync_dump_buf[64 * 1024]; -void sync_dump(void) -{ - struct seq_file s = { - .buf = sync_dump_buf, - .size = sizeof(sync_dump_buf) - 1, - }; - int i; - - sync_debugfs_show(&s, NULL); - - for (i = 0; i < s.count; i += DUMP_CHUNK) { - if ((s.count - i) > DUMP_CHUNK) { - char c = s.buf[i + DUMP_CHUNK]; - s.buf[i + DUMP_CHUNK] = 0; - pr_cont("%s", s.buf + i); - s.buf[i + DUMP_CHUNK] = c; - } else { - s.buf[s.count] = 0; - pr_cont("%s", s.buf + i); - } - } -} -#else -static void sync_dump(void) -{ -} -#endif |