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drm/syncobj: remove drm_syncobj_cb and cleanup

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This completes "drm/syncobj: Drop add/remove_callback from driver
interface" and cleans up the implementation a bit.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Link: https://patchwork.freedesktop.org/patch/266255/
This commit is contained in:
Christian König 2018-12-11 18:34:41 +08:00 committed by Christian König
parent 3415701a5e
commit 61a98b1b9a
2 changed files with 31 additions and 83 deletions
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93
drivers/gpu/drm/drm_syncobj.c
View File

@ -56,6 +56,16 @@
#include "drm_internal.h"
#include <drm/drm_syncobj.h>
struct syncobj_wait_entry {
struct list_head node;
struct task_struct *task;
struct dma_fence *fence;
struct dma_fence_cb fence_cb;
};
static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
struct syncobj_wait_entry *wait);
/**
* drm_syncobj_find - lookup and reference a sync object.
* @file_private: drm file private pointer
@ -82,58 +92,33 @@ struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
}
EXPORT_SYMBOL(drm_syncobj_find);
static void drm_syncobj_add_callback_locked(struct drm_syncobj *syncobj,
struct drm_syncobj_cb *cb,
drm_syncobj_func_t func)
static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj,
struct syncobj_wait_entry *wait)
{
cb->func = func;
list_add_tail(&cb->node, &syncobj->cb_list);
}
static int drm_syncobj_fence_get_or_add_callback(struct drm_syncobj *syncobj,
struct dma_fence **fence,
struct drm_syncobj_cb *cb,
drm_syncobj_func_t func)
{
int ret;
*fence = drm_syncobj_fence_get(syncobj);
if (*fence)
return 1;
if (wait->fence)
return;
spin_lock(&syncobj->lock);
/* We've already tried once to get a fence and failed. Now that we
* have the lock, try one more time just to be sure we don't add a
* callback when a fence has already been set.
*/
if (syncobj->fence) {
*fence = dma_fence_get(rcu_dereference_protected(syncobj->fence,
lockdep_is_held(&syncobj->lock)));
ret = 1;
} else {
*fence = NULL;
drm_syncobj_add_callback_locked(syncobj, cb, func);
ret = 0;
}
spin_unlock(&syncobj->lock);
return ret;
}
void drm_syncobj_add_callback(struct drm_syncobj *syncobj,
struct drm_syncobj_cb *cb,
drm_syncobj_func_t func)
{
spin_lock(&syncobj->lock);
drm_syncobj_add_callback_locked(syncobj, cb, func);
if (syncobj->fence)
wait->fence = dma_fence_get(
rcu_dereference_protected(syncobj->fence, 1));
else
list_add_tail(&wait->node, &syncobj->cb_list);
spin_unlock(&syncobj->lock);
}
void drm_syncobj_remove_callback(struct drm_syncobj *syncobj,
struct drm_syncobj_cb *cb)
static void drm_syncobj_remove_wait(struct drm_syncobj *syncobj,
struct syncobj_wait_entry *wait)
{
if (!wait->node.next)
return;
spin_lock(&syncobj->lock);
list_del_init(&cb->node);
list_del_init(&wait->node);
spin_unlock(&syncobj->lock);
}
@ -148,7 +133,7 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
struct dma_fence *fence)
{
struct dma_fence *old_fence;
struct drm_syncobj_cb *cur, *tmp;
struct syncobj_wait_entry *cur, *tmp;
if (fence)
dma_fence_get(fence);
@ -162,7 +147,7 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
if (fence != old_fence) {
list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) {
list_del_init(&cur->node);
cur->func(syncobj, cur);
syncobj_wait_syncobj_func(syncobj, cur);
}
}
@ -608,13 +593,6 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
&args->handle);
}
struct syncobj_wait_entry {
struct task_struct *task;
struct dma_fence *fence;
struct dma_fence_cb fence_cb;
struct drm_syncobj_cb syncobj_cb;
};
static void syncobj_wait_fence_func(struct dma_fence *fence,
struct dma_fence_cb *cb)
{
@ -625,11 +603,8 @@ static void syncobj_wait_fence_func(struct dma_fence *fence,
}
static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
struct drm_syncobj_cb *cb)
struct syncobj_wait_entry *wait)
{
struct syncobj_wait_entry *wait =
container_of(cb, struct syncobj_wait_entry, syncobj_cb);
/* This happens inside the syncobj lock */
wait->fence = dma_fence_get(rcu_dereference_protected(syncobj->fence,
lockdep_is_held(&syncobj->lock)));
@ -688,12 +663,8 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
*/
if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
for (i = 0; i < count; ++i) {
drm_syncobj_fence_get_or_add_callback(syncobjs[i],
&entries[i].fence,
&entries[i].syncobj_cb,
syncobj_wait_syncobj_func);
}
for (i = 0; i < count; ++i)
drm_syncobj_fence_add_wait(syncobjs[i], &entries[i]);
}
do {
@ -742,9 +713,7 @@ done_waiting:
cleanup_entries:
for (i = 0; i < count; ++i) {
if (entries[i].syncobj_cb.func)
drm_syncobj_remove_callback(syncobjs[i],
&entries[i].syncobj_cb);
drm_syncobj_remove_wait(syncobjs[i], &entries[i]);
if (entries[i].fence_cb.func)
dma_fence_remove_callback(entries[i].fence,
&entries[i].fence_cb);

21
include/drm/drm_syncobj.h
View File

@ -28,8 +28,6 @@
#include "linux/dma-fence.h"
struct drm_syncobj_cb;
/**
* struct drm_syncobj - sync object.
*
@ -62,25 +60,6 @@ struct drm_syncobj {
struct file *file;
};
typedef void (*drm_syncobj_func_t)(struct drm_syncobj *syncobj,
struct drm_syncobj_cb *cb);
/**
* struct drm_syncobj_cb - callback for drm_syncobj_add_callback
* @node: used by drm_syncob_add_callback to append this struct to
* &drm_syncobj.cb_list
* @func: drm_syncobj_func_t to call
*
* This struct will be initialized by drm_syncobj_add_callback, additional
* data can be passed along by embedding drm_syncobj_cb in another struct.
* The callback will get called the next time drm_syncobj_replace_fence is
* called.
*/
struct drm_syncobj_cb {
struct list_head node;
drm_syncobj_func_t func;
};
void drm_syncobj_free(struct kref *kref);
/**