Commit 96e7ebb2 authored by Matthew Brost's avatar Matthew Brost
Browse files

drm/xe: Add xe_exec_queue_last_fence_test_dep 



Helpful to determine if a bind can immediately use CPU or needs to be
deferred a drm scheduler job.

v7:
 - Better wording in kernel doc (Matthew Auld)

Signed-off-by: default avatarMatthew Brost <matthew.brost@intel.com>
Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240704041652.272920-4-matthew.brost@intel.com
parent 2e524668

drivers/gpu/drm/xe/xe_exec_queue.c

+23 −0
Original line number Diff line number Diff line
@@ -906,3 +906,26 @@ void xe_exec_queue_last_fence_set(struct xe_exec_queue *q, struct xe_vm *vm, 
	xe_exec_queue_last_fence_put(q, vm);

	q->last_fence = dma_fence_get(fence);

}



/**

 * xe_exec_queue_last_fence_test_dep - Test last fence dependency of queue

 * @q: The exec queue

 * @vm: The VM the engine does a bind or exec for

 *

 * Returns:

 * -ETIME if there exists an unsignalled last fence dependency, zero otherwise.

 */

int xe_exec_queue_last_fence_test_dep(struct xe_exec_queue *q, struct xe_vm *vm)

{

	struct dma_fence *fence;

	int err = 0;



	fence = xe_exec_queue_last_fence_get(q, vm);

	if (fence) {

		err = test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags) ?

			0 : -ETIME;

		dma_fence_put(fence);

	}



	return err;

}

drivers/gpu/drm/xe/xe_exec_queue.h

+2 −0
Original line number Diff line number Diff line
@@ -75,6 +75,8 @@ struct dma_fence *xe_exec_queue_last_fence_get(struct xe_exec_queue *e, 
					       struct xe_vm *vm);

void xe_exec_queue_last_fence_set(struct xe_exec_queue *e, struct xe_vm *vm,

				  struct dma_fence *fence);

int xe_exec_queue_last_fence_test_dep(struct xe_exec_queue *q,

				      struct xe_vm *vm);

void xe_exec_queue_update_run_ticks(struct xe_exec_queue *q);



#endif