3  * Parts ported from amdgpu (fence wait code).
44  *  - Wait for a syncobj's fence to appear and be signaled
51  *   - Wait for a given point to appear and/or be signaled
107  * Host-side wait on syncobjs
111  * host-side wait on all of the syncobj fences simultaneously.
112  * If &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL is set, the wait ioctl will wait on
119  * the host-side wait will first wait for the syncobj to receive a non-NULL
120  * fence and then wait on that fence.
124  * to do a host wait in one thread (or process) which waits on GPU work
130  * handles as well as an array of u64 points and does a host-side wait on all
133  * &DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT also adds the ability to wait for a given
136  * requirement is inherited from the wait-before-signal behavior required by
212 				      struct syncobj_wait_entry *wait);
241 				       struct syncobj_wait_entry *wait)  in drm_syncobj_fence_add_wait()  argument
245 	if (wait->fence)  in drm_syncobj_fence_add_wait()
254 	if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {  in drm_syncobj_fence_add_wait()
256 		list_add_tail(&wait->node, &syncobj->cb_list);  in drm_syncobj_fence_add_wait()
258 		wait->fence = dma_fence_get_stub();  in drm_syncobj_fence_add_wait()
260 		wait->fence = fence;  in drm_syncobj_fence_add_wait()
266 				    struct syncobj_wait_entry *wait)  in drm_syncobj_remove_wait()  argument
268 	if (!wait->node.next)  in drm_syncobj_remove_wait()
272 	list_del_init(&wait->node);  in drm_syncobj_remove_wait()
361 /* 5s default for wait submission */
383 	struct syncobj_wait_entry wait;  in drm_syncobj_find_fence()  local
405 	memset(&wait, 0, sizeof(wait));  in drm_syncobj_find_fence()
406 	wait.task = current;  in drm_syncobj_find_fence()
407 	wait.point = point;  in drm_syncobj_find_fence()
408 	drm_syncobj_fence_add_wait(syncobj, &wait);  in drm_syncobj_find_fence()
412 		if (wait.fence) {  in drm_syncobj_find_fence()
430 	*fence = wait.fence;  in drm_syncobj_find_fence()
432 	if (wait.node.next)  in drm_syncobj_find_fence()
433 		drm_syncobj_remove_wait(syncobj, &wait);  in drm_syncobj_find_fence()
903 	struct syncobj_wait_entry *wait =  in syncobj_wait_fence_func()  local
906 	wake_up_process(wait->task);  in syncobj_wait_fence_func()
910 				      struct syncobj_wait_entry *wait)  in syncobj_wait_syncobj_func()  argument
918 	if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {  in syncobj_wait_syncobj_func()
922 		wait->fence = dma_fence_get_stub();  in syncobj_wait_syncobj_func()
924 		wait->fence = fence;  in syncobj_wait_syncobj_func()
927 	wake_up_process(wait->task);  in syncobj_wait_syncobj_func()
928 	list_del_init(&wait->node);  in syncobj_wait_syncobj_func()
1005 	 * fallthough and try a 0 timeout wait!  in drm_syncobj_array_wait_timeout()
1109 				  struct drm_syncobj_wait *wait,  in drm_syncobj_array_wait()  argument
1117 		timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec);  in drm_syncobj_array_wait()
1120 							 wait->count_handles,  in drm_syncobj_array_wait()
1121 							 wait->flags,  in drm_syncobj_array_wait()
1125 		wait->first_signaled = first;  in drm_syncobj_array_wait()