[PATCH 3/7] sync_file: split out fence_file base class from sync_file.
Dave Airlie
airlied at gmail.com
Thu Apr 13 01:41:40 UTC 2017
From: Dave Airlie <airlied at redhat.com>
This just splits out a common base object to be shared
between sync_file and sem_files.
Signed-off-by: Dave Airlie <airlied at redhat.com>
---
drivers/dma-buf/sync_file.c | 49 +++++++++++++++++++++++++++-----------------
drivers/gpu/drm/drm_atomic.c | 4 ++--
include/linux/sync_file.h | 17 ++++++++++-----
3 files changed, 44 insertions(+), 26 deletions(-)
diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c
index 9b7ad7e..2342d8b 100644
--- a/drivers/dma-buf/sync_file.c
+++ b/drivers/dma-buf/sync_file.c
@@ -28,17 +28,28 @@
static const struct file_operations sync_file_fops;
+static int fence_file_init(struct fence_file *fence_file,
+ const struct file_operations *fops)
+{
+ fence_file->file = anon_inode_getfile("fence_file", fops,
+ fence_file, 0);
+ if (IS_ERR(fence_file->file))
+ return PTR_ERR(fence_file->file);
+ return 0;
+}
+
static struct sync_file *sync_file_alloc(void)
{
struct sync_file *sync_file;
+ int ret;
sync_file = kzalloc(sizeof(*sync_file), 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))
+ ret = fence_file_init(&sync_file->base,
+ &sync_file_fops);
+ if (ret)
goto err;
init_waitqueue_head(&sync_file->wq);
@@ -67,7 +78,7 @@ static void fence_check_cb_func(struct dma_fence *f, struct dma_fence_cb *cb)
*
* Creates a sync_file containg @fence. This function acquires and additional
* reference of @fence for the newly-created &sync_file, if it succeeds. The
- * sync_file can be released with fput(sync_file->file). Returns the
+ * sync_file can be released with fput(sync_file->base.file). Returns the
* sync_file or NULL in case of error.
*/
struct sync_file *sync_file_create(struct dma_fence *fence)
@@ -78,7 +89,7 @@ struct sync_file *sync_file_create(struct dma_fence *fence)
if (!sync_file)
return NULL;
- RCU_INIT_POINTER(sync_file->fence, dma_fence_get(fence));
+ RCU_INIT_POINTER(sync_file->base.fence, dma_fence_get(fence));
snprintf(sync_file->name, sizeof(sync_file->name), "%s-%s%llu-%d",
fence->ops->get_driver_name(fence),
@@ -122,8 +133,8 @@ struct dma_fence *sync_file_get_fence(int fd)
if (!sync_file)
return NULL;
- fence = dma_fence_get(rcu_dereference_protected(sync_file->fence, 1));
- fput(sync_file->file);
+ fence = dma_fence_get(rcu_dereference_protected(sync_file->base.fence, 1));
+ fput(sync_file->base.file);
return fence;
}
@@ -141,7 +152,7 @@ static int sync_file_set_fence(struct sync_file *sync_file,
* we own the reference of the dma_fence_array creation.
*/
if (num_fences == 1) {
- RCU_INIT_POINTER(sync_file->fence, fences[0]);
+ RCU_INIT_POINTER(sync_file->base.fence, fences[0]);
kfree(fences);
} else {
array = dma_fence_array_create(num_fences, fences,
@@ -150,7 +161,7 @@ static int sync_file_set_fence(struct sync_file *sync_file,
if (!array)
return -ENOMEM;
- RCU_INIT_POINTER(sync_file->fence, &array->base);
+ RCU_INIT_POINTER(sync_file->base.fence, &array->base);
}
return 0;
@@ -159,7 +170,7 @@ static int sync_file_set_fence(struct sync_file *sync_file,
static struct dma_fence **get_fences(struct sync_file *sync_file,
int *num_fences)
{
- struct dma_fence *fence = rcu_dereference_protected(sync_file->fence, 1);
+ struct dma_fence *fence = rcu_dereference_protected(sync_file->base.fence, 1);
if (dma_fence_is_array(fence)) {
struct dma_fence_array *array = to_dma_fence_array(fence);
@@ -168,7 +179,7 @@ static struct dma_fence **get_fences(struct sync_file *sync_file,
}
*num_fences = 1;
- return &sync_file->fence;
+ return &sync_file->base.fence;
}
static void add_fence(struct dma_fence **fences,
@@ -271,7 +282,7 @@ static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
return sync_file;
err:
- fput(sync_file->file);
+ fput(sync_file->base.file);
return NULL;
}
@@ -281,7 +292,7 @@ static int sync_file_release(struct inode *inode, struct file *file)
struct sync_file *sync_file = file->private_data;
struct dma_fence *fence;
- fence = rcu_dereference_protected(sync_file->fence, 1);
+ fence = rcu_dereference_protected(sync_file->base.fence, 1);
if (test_bit(POLL_ENABLED, &fence->flags))
dma_fence_remove_callback(fence, &sync_file->cb);
dma_fence_put(fence);
@@ -295,7 +306,7 @@ static unsigned int sync_file_poll(struct file *file, poll_table *wait)
struct sync_file *sync_file = file->private_data;
struct dma_fence *fence;
- fence = rcu_dereference_protected(sync_file->fence, 1);
+ fence = rcu_dereference_protected(sync_file->base.fence, 1);
poll_wait(file, &sync_file->wq, wait);
@@ -348,15 +359,15 @@ static long sync_file_ioctl_merge(struct sync_file *sync_file,
goto err_put_fence3;
}
- fd_install(fd, fence3->file);
- fput(fence2->file);
+ fd_install(fd, fence3->base.file);
+ fput(fence2->base.file);
return 0;
err_put_fence3:
- fput(fence3->file);
+ fput(fence3->base.file);
err_put_fence2:
- fput(fence2->file);
+ fput(fence2->base.file);
err_put_fd:
put_unused_fd(fd);
@@ -420,7 +431,7 @@ static long sync_file_ioctl_fence_info(struct sync_file *sync_file,
no_fences:
strlcpy(info.name, sync_file->name, sizeof(info.name));
- info.status = dma_fence_is_signaled(rcu_dereference_protected(sync_file->fence, 1));
+ info.status = dma_fence_is_signaled(rcu_dereference_protected(sync_file->base.fence, 1));
info.num_fences = num_fences;
if (copy_to_user((void __user *)arg, &info, sizeof(info)))
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index a567310..16053a0 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -2012,7 +2012,7 @@ static void complete_crtc_signaling(struct drm_device *dev,
if (install_fds) {
for (i = 0; i < num_fences; i++)
fd_install(fence_state[i].fd,
- fence_state[i].sync_file->file);
+ fence_state[i].sync_file->base.file);
kfree(fence_state);
return;
@@ -2036,7 +2036,7 @@ static void complete_crtc_signaling(struct drm_device *dev,
for (i = 0; i < num_fences; i++) {
if (fence_state[i].sync_file)
- fput(fence_state[i].sync_file->file);
+ fput(fence_state[i].sync_file->base.file);
if (fence_state[i].fd >= 0)
put_unused_fd(fence_state[i].fd);
diff --git a/include/linux/sync_file.h b/include/linux/sync_file.h
index adbc0b9..b0ae1cf 100644
--- a/include/linux/sync_file.h
+++ b/include/linux/sync_file.h
@@ -21,24 +21,31 @@
#include <linux/dma-fence-array.h>
/**
- * struct sync_file - sync file to export to the userspace
+ * struct fence_file - basic file to fence mapping
* @file: file representing this fence
+ * @fence: fence with the fences in the fence_file
+ */
+struct fence_file {
+ struct file *file;
+ struct dma_fence __rcu *fence;
+};
+
+/**
+ * struct sync_file - sync file to export to the userspace
+ * @base: base fence file
* @name: name of sync_file. Useful for debugging
* @sync_file_list: membership in global file list
* @wq: wait queue for fence signaling
- * @fence: fence with the fences in the sync_file
* @cb: fence callback information
*/
struct sync_file {
- struct file *file;
+ struct fence_file base;
char name[32];
#ifdef CONFIG_DEBUG_FS
struct list_head sync_file_list;
#endif
wait_queue_head_t wq;
-
- struct dma_fence __rcu *fence;
struct dma_fence_cb cb;
};
--
2.9.3
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