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drm/syncobj: use the timeline point in drm_syncobj_find_fence v4 

Implement finding the right timeline point in drm_syncobj_find_fence.

v2: return -EINVAL when the point is not submitted yet.
v3: fix reference counting bug, add flags handling as well
v4: add timeout for find fence

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Link: https://patchwork.freedesktop.org/patch/295786/?series=58813&rev=1
hifive-unleashed-5.2
Christian König 2019-04-01 17:50:59 +08:00 committed by Christian König
parent 27b575a9aa
commit bc9c80fe01
1 changed files with 47 additions and 3 deletions
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50
drivers/gpu/drm/drm_syncobj.c
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@ -214,6 +214,8 @@ static void drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)
dma_fence_put(fence);
}
/* 5s default for wait submission */
#define DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT 5000000000ULL
/**
* drm_syncobj_find_fence - lookup and reference the fence in a sync object
* @file_private: drm file private pointer
@ -234,16 +236,58 @@ int drm_syncobj_find_fence(struct drm_file *file_private,
struct dma_fence **fence)
{
struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);
int ret = 0;
struct syncobj_wait_entry wait;
u64 timeout = nsecs_to_jiffies64(DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT);
int ret;
if (!syncobj)
return -ENOENT;
*fence = drm_syncobj_fence_get(syncobj);
if (!*fence) {
drm_syncobj_put(syncobj);
if (*fence) {
ret = dma_fence_chain_find_seqno(fence, point);
if (!ret)
return 0;
dma_fence_put(*fence);
} else {
ret = -EINVAL;
}
drm_syncobj_put(syncobj);
if (!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT))
return ret;
memset(&wait, 0, sizeof(wait));
wait.task = current;
wait.point = point;
drm_syncobj_fence_add_wait(syncobj, &wait);
do {
set_current_state(TASK_INTERRUPTIBLE);
if (wait.fence) {
ret = 0;
break;
}
if (timeout == 0) {
ret = -ETIME;
break;
}
if (signal_pending(current)) {
ret = -ERESTARTSYS;
break;
}
timeout = schedule_timeout(timeout);
} while (1);
__set_current_state(TASK_RUNNING);
*fence = wait.fence;
if (wait.node.next)
drm_syncobj_remove_wait(syncobj, &wait);
return ret;
}
EXPORT_SYMBOL(drm_syncobj_find_fence);