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
135  * handles as well as an array of u64 points and does a host-side wait on all
138  * &DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT also adds the ability to wait for a given
141  * requirement is inherited from the wait-before-signal behavior required by
144  * Alternatively, &DRM_IOCTL_SYNCOBJ_EVENTFD can be used to wait without
146  * integrate the wait in an event loop.
224 				      struct syncobj_wait_entry *wait);
267 				       struct syncobj_wait_entry *wait)  in drm_syncobj_fence_add_wait()  argument
271 	if (wait->fence)  in drm_syncobj_fence_add_wait()
280 	if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {  in drm_syncobj_fence_add_wait()
282 		list_add_tail(&wait->node, &syncobj->cb_list);  in drm_syncobj_fence_add_wait()
284 		wait->fence = dma_fence_get_stub();  in drm_syncobj_fence_add_wait()
286 		wait->fence = fence;  in drm_syncobj_fence_add_wait()
292 				    struct syncobj_wait_entry *wait)  in drm_syncobj_remove_wait()  argument
294 	if (!wait->node.next)  in drm_syncobj_remove_wait()
298 	list_del_init(&wait->node);  in drm_syncobj_remove_wait()
419 /* 5s default for wait submission */
441 	struct syncobj_wait_entry wait;  in drm_syncobj_find_fence()  local
483 	memset(&wait, 0, sizeof(wait));  in drm_syncobj_find_fence()
484 	wait.task = current;  in drm_syncobj_find_fence()
485 	wait.point = point;  in drm_syncobj_find_fence()
486 	drm_syncobj_fence_add_wait(syncobj, &wait);  in drm_syncobj_find_fence()
490 		if (wait.fence) {  in drm_syncobj_find_fence()
508 	*fence = wait.fence;  in drm_syncobj_find_fence()
510 	if (wait.node.next)  in drm_syncobj_find_fence()
511 		drm_syncobj_remove_wait(syncobj, &wait);  in drm_syncobj_find_fence()
1005 	struct syncobj_wait_entry *wait =  in syncobj_wait_fence_func()  local
1008 	wake_up_process(wait->task);  in syncobj_wait_fence_func()
1012 				      struct syncobj_wait_entry *wait)  in syncobj_wait_syncobj_func()  argument
1020 	if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {  in syncobj_wait_syncobj_func()
1024 		wait->fence = dma_fence_get_stub();  in syncobj_wait_syncobj_func()
1026 		wait->fence = fence;  in syncobj_wait_syncobj_func()
1029 	wake_up_process(wait->task);  in syncobj_wait_syncobj_func()
1030 	list_del_init(&wait->node);  in syncobj_wait_syncobj_func()
1115 	 * fallthough and try a 0 timeout wait!  in drm_syncobj_array_wait_timeout()
1229 				  struct drm_syncobj_wait *wait,  in drm_syncobj_array_wait()  argument
1238 		timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec);  in drm_syncobj_array_wait()
1241 							 wait->count_handles,  in drm_syncobj_array_wait()
1242 							 wait->flags,  in drm_syncobj_array_wait()
1247 		wait->first_signaled = first;  in drm_syncobj_array_wait()