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Commit d4cab38e authored by Gustavo Padovan's avatar Gustavo Padovan Committed by Greg Kroah-Hartman
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staging/android: prepare sync_file for de-staging 

Move its functions and structs to their own file. Also moves function's
docs to the .c file.
Signed-off-by: default avatarGustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d7c3110c
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Showing with 455 additions and 411 deletions
drivers/staging/android/Makefile
View file @ d4cab38e
...@@ -4,5 +4,5 @@ obj-y += ion/ ...@@ -4,5 +4,5 @@ obj-y += ion/
obj-$(CONFIG_ASHMEM) += ashmem.o obj-$(CONFIG_ASHMEM) += ashmem.o
obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER) += lowmemorykiller.o obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER) += lowmemorykiller.o
obj-$(CONFIG_SYNC) += sync.o sync_debug.o obj-$(CONFIG_SYNC) += sync_file.o sync.o sync_debug.o
obj-$(CONFIG_SW_SYNC) += sw_sync.o obj-$(CONFIG_SW_SYNC) += sw_sync.o
drivers/staging/android/sync.c
View file @ d4cab38e
...@@ -16,10 +16,7 @@ ...@@ -16,10 +16,7 @@
#include <linux/debugfs.h> #include <linux/debugfs.h>
#include <linux/export.h> #include <linux/export.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/sched.h> #include <linux/sched.h>
#include <linux/seq_file.h> #include <linux/seq_file.h>
#include <linux/slab.h> #include <linux/slab.h>
...@@ -32,7 +29,6 @@ ...@@ -32,7 +29,6 @@
#include "trace/sync.h" #include "trace/sync.h"
static const struct fence_ops android_fence_ops; static const struct fence_ops android_fence_ops;
static const struct file_operations sync_file_fops;
struct sync_timeline *sync_timeline_create(const struct sync_timeline_ops *ops, struct sync_timeline *sync_timeline_create(const struct sync_timeline_ops *ops,
int size, const char *name) int size, const char *name)
...@@ -136,182 +132,6 @@ struct fence *sync_pt_create(struct sync_timeline *obj, int size) ...@@ -136,182 +132,6 @@ struct fence *sync_pt_create(struct sync_timeline *obj, int size)
} }
EXPORT_SYMBOL(sync_pt_create); EXPORT_SYMBOL(sync_pt_create);
static struct sync_file *sync_file_alloc(int size)
{
struct sync_file *sync_file;
sync_file = kzalloc(size, GFP_KERNEL);
if (!sync_file)
return NULL;
sync_file->file = anon_inode_getfile("sync_file", &sync_file_fops,
sync_file, 0);
if (IS_ERR(sync_file->file))
goto err;
kref_init(&sync_file->kref);
init_waitqueue_head(&sync_file->wq);
return sync_file;
err:
kfree(sync_file);
return NULL;
}
static void fence_check_cb_func(struct fence *f, struct fence_cb *cb)
{
struct sync_file_cb *check;
struct sync_file *sync_file;
check = container_of(cb, struct sync_file_cb, cb);
sync_file = check->sync_file;
if (atomic_dec_and_test(&sync_file->status))
wake_up_all(&sync_file->wq);
}
/**
* sync_fence_create() - creates a sync fence
* @fence: fence to add to the sync_fence
*
* Creates a sync_file containg @fence. Once this is called, the sync_file
* takes ownership of @fence.
*/
struct sync_file *sync_file_create(struct fence *fence)
{
struct sync_file *sync_file;
sync_file = sync_file_alloc(offsetof(struct sync_file, cbs[1]));
if (!sync_file)
return NULL;
sync_file->num_fences = 1;
atomic_set(&sync_file->status, 1);
snprintf(sync_file->name, sizeof(sync_file->name), "%s-%s%d-%d",
fence->ops->get_driver_name(fence),
fence->ops->get_timeline_name(fence), fence->context,
fence->seqno);
sync_file->cbs[0].fence = fence;
sync_file->cbs[0].sync_file = sync_file;
if (fence_add_callback(fence, &sync_file->cbs[0].cb,
fence_check_cb_func))
atomic_dec(&sync_file->status);
sync_file_debug_add(sync_file);
return sync_file;
}
EXPORT_SYMBOL(sync_file_create);
/**
* sync_file_fdget() - get a sync_file from an fd
* @fd: fd referencing a fence
*
* Ensures @fd references a valid sync_file, increments the refcount of the
* backing file. Returns the sync_file or NULL in case of error.
*/
static struct sync_file *sync_file_fdget(int fd)
{
struct file *file = fget(fd);
if (!file)
return NULL;
if (file->f_op != &sync_file_fops)
goto err;
return file->private_data;
err:
fput(file);
return NULL;
}
static void sync_file_add_pt(struct sync_file *sync_file, int *i,
struct fence *fence)
{
sync_file->cbs[*i].fence = fence;
sync_file->cbs[*i].sync_file = sync_file;
if (!fence_add_callback(fence, &sync_file->cbs[*i].cb,
fence_check_cb_func)) {
fence_get(fence);
(*i)++;
}
}
/**
* sync_file_merge() - merge two sync_files
* @name: name of new fence
* @a: sync_file a
* @b: sync_file b
*
* Creates a new sync_file which contains copies of all the fences in both
* @a and @b. @a and @b remain valid, independent sync_file. Returns the
* new merged sync_file or NULL in case of error.
*/
static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
struct sync_file *b)
{
int num_fences = a->num_fences + b->num_fences;
struct sync_file *sync_file;
int i, i_a, i_b;
unsigned long size = offsetof(struct sync_file, cbs[num_fences]);
sync_file = sync_file_alloc(size);
if (!sync_file)
return NULL;
atomic_set(&sync_file->status, num_fences);
/*
* Assume sync_file a and b are both ordered and have no
* duplicates with the same context.
*
* If a sync_file can only be created with sync_file_merge
* and sync_file_create, this is a reasonable assumption.
*/
for (i = i_a = i_b = 0; i_a < a->num_fences && i_b < b->num_fences; ) {
struct fence *pt_a = a->cbs[i_a].fence;
struct fence *pt_b = b->cbs[i_b].fence;
if (pt_a->context < pt_b->context) {
sync_file_add_pt(sync_file, &i, pt_a);
i_a++;
} else if (pt_a->context > pt_b->context) {
sync_file_add_pt(sync_file, &i, pt_b);
i_b++;
} else {
if (pt_a->seqno - pt_b->seqno <= INT_MAX)
sync_file_add_pt(sync_file, &i, pt_a);
else
sync_file_add_pt(sync_file, &i, pt_b);
i_a++;
i_b++;
}
}
for (; i_a < a->num_fences; i_a++)
sync_file_add_pt(sync_file, &i, a->cbs[i_a].fence);
for (; i_b < b->num_fences; i_b++)
sync_file_add_pt(sync_file, &i, b->cbs[i_b].fence);
if (num_fences > i)
atomic_sub(num_fences - i, &sync_file->status);
sync_file->num_fences = i;
strlcpy(sync_file->name, name, sizeof(sync_file->name));
sync_file_debug_add(sync_file);
return sync_file;
}
static const char *android_fence_get_driver_name(struct fence *fence) static const char *android_fence_get_driver_name(struct fence *fence)
{ {
struct sync_timeline *parent = fence_parent(fence); struct sync_timeline *parent = fence_parent(fence);
...@@ -399,197 +219,3 @@ static const struct fence_ops android_fence_ops = { ...@@ -399,197 +219,3 @@ static const struct fence_ops android_fence_ops = {
.fence_value_str = android_fence_value_str, .fence_value_str = android_fence_value_str,
.timeline_value_str = android_fence_timeline_value_str, .timeline_value_str = android_fence_timeline_value_str,
}; };
static void sync_file_free(struct kref *kref)
{
struct sync_file *sync_file = container_of(kref, struct sync_file,
kref);
int i;
for (i = 0; i < sync_file->num_fences; ++i) {
fence_remove_callback(sync_file->cbs[i].fence,
&sync_file->cbs[i].cb);
fence_put(sync_file->cbs[i].fence);
}
kfree(sync_file);
}
static int sync_file_release(struct inode *inode, struct file *file)
{
struct sync_file *sync_file = file->private_data;
sync_file_debug_remove(sync_file);
kref_put(&sync_file->kref, sync_file_free);
return 0;
}
static unsigned int sync_file_poll(struct file *file, poll_table *wait)
{
struct sync_file *sync_file = file->private_data;
int status;
poll_wait(file, &sync_file->wq, wait);
status = atomic_read(&sync_file->status);
if (!status)
return POLLIN;
if (status < 0)
return POLLERR;
return 0;
}
static long sync_file_ioctl_merge(struct sync_file *sync_file,
unsigned long arg)
{
int fd = get_unused_fd_flags(O_CLOEXEC);
int err;
struct sync_file *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;
}
if (data.flags || data.pad) {
err = -EINVAL;
goto err_put_fd;
}
fence2 = sync_file_fdget(data.fd2);
if (!fence2) {
err = -ENOENT;
goto err_put_fd;
}
data.name[sizeof(data.name) - 1] = '\0';
fence3 = sync_file_merge(data.name, sync_file, fence2);
if (!fence3) {
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;
}
fd_install(fd, fence3->file);
fput(fence2->file);
return 0;
err_put_fence3:
fput(fence3->file);
err_put_fence2:
fput(fence2->file);
err_put_fd:
put_unused_fd(fd);
return err;
}
static void sync_fill_fence_info(struct fence *fence,
struct sync_fence_info *info)
{
strlcpy(info->obj_name, fence->ops->get_timeline_name(fence),
sizeof(info->obj_name));
strlcpy(info->driver_name, fence->ops->get_driver_name(fence),
sizeof(info->driver_name));
if (fence_is_signaled(fence))
info->status = fence->status >= 0 ? 1 : fence->status;
else
info->status = 0;
info->timestamp_ns = ktime_to_ns(fence->timestamp);
}
static long sync_file_ioctl_fence_info(struct sync_file *sync_file,
unsigned long arg)
{
struct sync_file_info info;
struct sync_fence_info *fence_info = NULL;
__u32 size;
int ret, i;
if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
return -EFAULT;
if (info.flags || info.pad)
return -EINVAL;
/*
* Passing num_fences = 0 means that userspace doesn't want to
* retrieve any sync_fence_info. If num_fences = 0 we skip filling
* sync_fence_info and return the actual number of fences on
* info->num_fences.
*/
if (!info.num_fences)
goto no_fences;
if (info.num_fences < sync_file->num_fences)
return -EINVAL;
size = sync_file->num_fences * sizeof(*fence_info);
fence_info = kzalloc(size, GFP_KERNEL);
if (!fence_info)
return -ENOMEM;
for (i = 0; i < sync_file->num_fences; ++i)
sync_fill_fence_info(sync_file->cbs[i].fence, &fence_info[i]);
if (copy_to_user(u64_to_user_ptr(info.sync_fence_info), fence_info,
size)) {
ret = -EFAULT;
goto out;
}
no_fences:
strlcpy(info.name, sync_file->name, sizeof(info.name));
info.status = atomic_read(&sync_file->status);
if (info.status >= 0)
info.status = !info.status;
info.num_fences = sync_file->num_fences;
if (copy_to_user((void __user *)arg, &info, sizeof(info)))
ret = -EFAULT;
else
ret = 0;
out:
kfree(fence_info);
return ret;
}
static long sync_file_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct sync_file *sync_file = file->private_data;
switch (cmd) {
case SYNC_IOC_MERGE:
return sync_file_ioctl_merge(sync_file, arg);
case SYNC_IOC_FILE_INFO:
return sync_file_ioctl_fence_info(sync_file, arg);
default:
return -ENOTTY;
}
}
static const struct file_operations sync_file_fops = {
.release = sync_file_release,
.poll = sync_file_poll,
.unlocked_ioctl = sync_file_ioctl,
.compat_ioctl = sync_file_ioctl,
};
drivers/staging/android/sync.h
View file @ d4cab38e
...@@ -20,10 +20,10 @@ ...@@ -20,10 +20,10 @@
#include <linux/spinlock.h> #include <linux/spinlock.h>
#include <linux/fence.h> #include <linux/fence.h>
#include "uapi/sync.h" #include "sync_file.h"
#include "uapi/sync_file.h"
struct sync_timeline; struct sync_timeline;
struct sync_file;
/** /**
* struct sync_timeline_ops - sync object implementation ops * struct sync_timeline_ops - sync object implementation ops
...@@ -86,38 +86,6 @@ static inline struct sync_timeline *fence_parent(struct fence *fence) ...@@ -86,38 +86,6 @@ static inline struct sync_timeline *fence_parent(struct fence *fence)
child_list_lock); child_list_lock);
} }
struct sync_file_cb {
struct fence_cb cb;
struct fence *fence;
struct sync_file *sync_file;
};
/**
* struct sync_file - sync file to export to the userspace
* @file: file representing this fence
* @kref: reference count on fence.
* @name: name of sync_file. Useful for debugging
* @sync_file_list: membership in global file list
* @num_fences number of sync_pts in the fence
* @wq: wait queue for fence signaling
* @status: 0: signaled, >0:active, <0: error
* @cbs: sync_pts callback information
*/
struct sync_file {
struct file *file;
struct kref kref;
char name[32];
#ifdef CONFIG_DEBUG_FS
struct list_head sync_file_list;
#endif
int num_fences;
wait_queue_head_t wq;
atomic_t status;
struct sync_file_cb cbs[];
};
/* /*
* API for sync_timeline implementers * API for sync_timeline implementers
*/ */
...@@ -167,8 +135,6 @@ void sync_timeline_signal(struct sync_timeline *obj); ...@@ -167,8 +135,6 @@ void sync_timeline_signal(struct sync_timeline *obj);
*/ */
struct fence *sync_pt_create(struct sync_timeline *parent, int size); struct fence *sync_pt_create(struct sync_timeline *parent, int size);
struct sync_file *sync_file_create(struct fence *fence);
#ifdef CONFIG_DEBUG_FS #ifdef CONFIG_DEBUG_FS
void sync_timeline_debug_add(struct sync_timeline *obj); void sync_timeline_debug_add(struct sync_timeline *obj);
......
drivers/staging/android/sync_debug.c
View file @ d4cab38e
...@@ -26,6 +26,7 @@ ...@@ -26,6 +26,7 @@
#include <linux/uaccess.h> #include <linux/uaccess.h>
#include <linux/anon_inodes.h> #include <linux/anon_inodes.h>
#include <linux/time64.h> #include <linux/time64.h>
#include "sync_file.h"
#include "sw_sync.h" #include "sw_sync.h"
#ifdef CONFIG_DEBUG_FS #ifdef CONFIG_DEBUG_FS
......
drivers/staging/android/sync_file.c 0 → 100644
View file @ d4cab38e
/*
* drivers/dma-buf/sync_file.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/export.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/anon_inodes.h>
#include "sync_file.h"
#include "uapi/sync_file.h"
static const struct file_operations sync_file_fops;
static struct sync_file *sync_file_alloc(int size)
{
struct sync_file *sync_file;
sync_file = kzalloc(size, GFP_KERNEL);
if (!sync_file)
return NULL;
sync_file->file = anon_inode_getfile("sync_file", &sync_file_fops,
sync_file, 0);
if (IS_ERR(sync_file->file))
goto err;
kref_init(&sync_file->kref);
init_waitqueue_head(&sync_file->wq);
return sync_file;
err:
kfree(sync_file);
return NULL;
}
static void fence_check_cb_func(struct fence *f, struct fence_cb *cb)
{
struct sync_file_cb *check;
struct sync_file *sync_file;
check = container_of(cb, struct sync_file_cb, cb);
sync_file = check->sync_file;
if (atomic_dec_and_test(&sync_file->status))
wake_up_all(&sync_file->wq);
}
/**
* sync_fence_create() - creates a sync fence
* @fence: fence to add to the sync_fence
*
* Creates a sync_file containg @fence. Once this is called, the sync_file
* takes ownership of @fence.
*/
struct sync_file *sync_file_create(struct fence *fence)
{
struct sync_file *sync_file;
sync_file = sync_file_alloc(offsetof(struct sync_file, cbs[1]));
if (!sync_file)
return NULL;
sync_file->num_fences = 1;
atomic_set(&sync_file->status, 1);
snprintf(sync_file->name, sizeof(sync_file->name), "%s-%s%d-%d",
fence->ops->get_driver_name(fence),
fence->ops->get_timeline_name(fence), fence->context,
fence->seqno);
sync_file->cbs[0].fence = fence;
sync_file->cbs[0].sync_file = sync_file;
if (fence_add_callback(fence, &sync_file->cbs[0].cb,
fence_check_cb_func))
atomic_dec(&sync_file->status);
return sync_file;
}
EXPORT_SYMBOL(sync_file_create);
/**
* sync_file_fdget() - get a sync_file from an fd
* @fd: fd referencing a fence
*
* Ensures @fd references a valid sync_file, increments the refcount of the
* backing file. Returns the sync_file or NULL in case of error.
*/
static struct sync_file *sync_file_fdget(int fd)
{
struct file *file = fget(fd);
if (!file)
return NULL;
if (file->f_op != &sync_file_fops)
goto err;
return file->private_data;
err:
fput(file);
return NULL;
}
static void sync_file_add_pt(struct sync_file *sync_file, int *i,
struct fence *fence)
{
sync_file->cbs[*i].fence = fence;
sync_file->cbs[*i].sync_file = sync_file;
if (!fence_add_callback(fence, &sync_file->cbs[*i].cb,
fence_check_cb_func)) {
fence_get(fence);
(*i)++;
}
}
/**
* sync_file_merge() - merge two sync_files
* @name: name of new fence
* @a: sync_file a
* @b: sync_file b
*
* Creates a new sync_file which contains copies of all the fences in both
* @a and @b. @a and @b remain valid, independent sync_file. Returns the
* new merged sync_file or NULL in case of error.
*/
static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
struct sync_file *b)
{
int num_fences = a->num_fences + b->num_fences;
struct sync_file *sync_file;
int i, i_a, i_b;
unsigned long size = offsetof(struct sync_file, cbs[num_fences]);
sync_file = sync_file_alloc(size);
if (!sync_file)
return NULL;
atomic_set(&sync_file->status, num_fences);
/*
* Assume sync_file a and b are both ordered and have no
* duplicates with the same context.
*
* If a sync_file can only be created with sync_file_merge
* and sync_file_create, this is a reasonable assumption.
*/
for (i = i_a = i_b = 0; i_a < a->num_fences && i_b < b->num_fences; ) {
struct fence *pt_a = a->cbs[i_a].fence;
struct fence *pt_b = b->cbs[i_b].fence;
if (pt_a->context < pt_b->context) {
sync_file_add_pt(sync_file, &i, pt_a);
i_a++;
} else if (pt_a->context > pt_b->context) {
sync_file_add_pt(sync_file, &i, pt_b);
i_b++;
} else {
if (pt_a->seqno - pt_b->seqno <= INT_MAX)
sync_file_add_pt(sync_file, &i, pt_a);
else
sync_file_add_pt(sync_file, &i, pt_b);
i_a++;
i_b++;
}
}
for (; i_a < a->num_fences; i_a++)
sync_file_add_pt(sync_file, &i, a->cbs[i_a].fence);
for (; i_b < b->num_fences; i_b++)
sync_file_add_pt(sync_file, &i, b->cbs[i_b].fence);
if (num_fences > i)
atomic_sub(num_fences - i, &sync_file->status);
sync_file->num_fences = i;
strlcpy(sync_file->name, name, sizeof(sync_file->name));
return sync_file;
}
static void sync_file_free(struct kref *kref)
{
struct sync_file *sync_file = container_of(kref, struct sync_file,
kref);
int i;
for (i = 0; i < sync_file->num_fences; ++i) {
fence_remove_callback(sync_file->cbs[i].fence,
&sync_file->cbs[i].cb);
fence_put(sync_file->cbs[i].fence);
}
kfree(sync_file);
}
static int sync_file_release(struct inode *inode, struct file *file)
{
struct sync_file *sync_file = file->private_data;
kref_put(&sync_file->kref, sync_file_free);
return 0;
}
static unsigned int sync_file_poll(struct file *file, poll_table *wait)
{
struct sync_file *sync_file = file->private_data;
int status;
poll_wait(file, &sync_file->wq, wait);
status = atomic_read(&sync_file->status);
if (!status)
return POLLIN;
if (status < 0)
return POLLERR;
return 0;
}
static long sync_file_ioctl_merge(struct sync_file *sync_file,
unsigned long arg)
{
int fd = get_unused_fd_flags(O_CLOEXEC);
int err;
struct sync_file *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;
}
if (data.flags || data.pad) {
err = -EINVAL;
goto err_put_fd;
}
fence2 = sync_file_fdget(data.fd2);
if (!fence2) {
err = -ENOENT;
goto err_put_fd;
}
data.name[sizeof(data.name) - 1] = '\0';
fence3 = sync_file_merge(data.name, sync_file, fence2);
if (!fence3) {
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;
}
fd_install(fd, fence3->file);
fput(fence2->file);
return 0;
err_put_fence3:
fput(fence3->file);
err_put_fence2:
fput(fence2->file);
err_put_fd:
put_unused_fd(fd);
return err;
}
static void sync_fill_fence_info(struct fence *fence,
struct sync_fence_info *info)
{
strlcpy(info->obj_name, fence->ops->get_timeline_name(fence),
sizeof(info->obj_name));
strlcpy(info->driver_name, fence->ops->get_driver_name(fence),
sizeof(info->driver_name));
if (fence_is_signaled(fence))
info->status = fence->status >= 0 ? 1 : fence->status;
else
info->status = 0;
info->timestamp_ns = ktime_to_ns(fence->timestamp);
}
static long sync_file_ioctl_fence_info(struct sync_file *sync_file,
unsigned long arg)
{
struct sync_file_info info;
struct sync_fence_info *fence_info = NULL;
__u32 size;
int ret, i;
if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
return -EFAULT;
if (info.flags || info.pad)
return -EINVAL;
/*
* Passing num_fences = 0 means that userspace doesn't want to
* retrieve any sync_fence_info. If num_fences = 0 we skip filling
* sync_fence_info and return the actual number of fences on
* info->num_fences.
*/
if (!info.num_fences)
goto no_fences;
if (info.num_fences < sync_file->num_fences)
return -EINVAL;
size = sync_file->num_fences * sizeof(*fence_info);
fence_info = kzalloc(size, GFP_KERNEL);
if (!fence_info)
return -ENOMEM;
for (i = 0; i < sync_file->num_fences; ++i)
sync_fill_fence_info(sync_file->cbs[i].fence, &fence_info[i]);
if (copy_to_user(u64_to_user_ptr(info.sync_fence_info), fence_info,
size)) {
ret = -EFAULT;
goto out;
}
no_fences:
strlcpy(info.name, sync_file->name, sizeof(info.name));
info.status = atomic_read(&sync_file->status);
if (info.status >= 0)
info.status = !info.status;
info.num_fences = sync_file->num_fences;
if (copy_to_user((void __user *)arg, &info, sizeof(info)))
ret = -EFAULT;
else
ret = 0;
out:
kfree(fence_info);
return ret;
}
static long sync_file_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct sync_file *sync_file = file->private_data;
switch (cmd) {
case SYNC_IOC_MERGE:
return sync_file_ioctl_merge(sync_file, arg);
case SYNC_IOC_FILE_INFO:
return sync_file_ioctl_fence_info(sync_file, arg);
default:
return -ENOTTY;
}
}
static const struct file_operations sync_file_fops = {
.release = sync_file_release,
.poll = sync_file_poll,
.unlocked_ioctl = sync_file_ioctl,
.compat_ioctl = sync_file_ioctl,
};
drivers/staging/android/sync_file.h 0 → 100644
View file @ d4cab38e
/*
* include/linux/sync_file.h
*
* Copyright (C) 2012 Google, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef _LINUX_SYNC_FILE_H
#define _LINUX_SYNC_FILE_H
#include <linux/types.h>
#include <linux/kref.h>
#include <linux/ktime.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/fence.h>
struct sync_file_cb {
struct fence_cb cb;
struct fence *fence;
struct sync_file *sync_file;
};
/**
* struct sync_file - sync file to export to the userspace
* @file: file representing this fence
* @kref: reference count on fence.
* @name: name of sync_file. Useful for debugging
* @sync_file_list: membership in global file list
* @num_fences number of sync_pts in the fence
* @wq: wait queue for fence signaling
* @status: 0: signaled, >0:active, <0: error
* @cbs: sync_pts callback information
*/
struct sync_file {
struct file *file;
struct kref kref;
char name[32];
#ifdef CONFIG_DEBUG_FS
struct list_head sync_file_list;
#endif
int num_fences;
wait_queue_head_t wq;
atomic_t status;
struct sync_file_cb cbs[];
};
struct sync_file *sync_file_create(struct fence *fence);
#endif /* _LINUX_SYNC_H */
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