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Commit 96169f4e authored by Rob Clark's avatar Rob Clark
Browse files

drm/msm: dump submits which triggered gpu hang 



Note we need to move update_fences() to after msm_rd_dump_submit(),
otherwise the bo's referenced by the submit may no longer be valid.

Signed-off-by: default avatarRob Clark <robdclark@gmail.com>
parent 544a32db

drivers/gpu/drm/msm/msm_gpu.c

+27 −20
Original line number Diff line number Diff line
@@ -257,34 +257,16 @@ static void recover_worker(struct work_struct *work) 
{

	struct msm_gpu *gpu = container_of(work, struct msm_gpu, recover_work);

	struct drm_device *dev = gpu->dev;

	struct msm_drm_private *priv = dev->dev_private;

	struct msm_gem_submit *submit;

	struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu);

	uint64_t fence;

	int i;



	/* Update all the rings with the latest and greatest fence */

	for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) {

		struct msm_ringbuffer *ring = gpu->rb[i];



		fence = ring->memptrs->fence;



		/*

		 * For the current (faulting?) ring/submit advance the fence by

		 * one more to clear the faulting submit

		 */

		if (ring == cur_ring)

			fence = fence + 1;



		update_fences(gpu, ring, fence);

	}



	mutex_lock(&dev->struct_mutex);





	dev_err(dev->dev, "%s: hangcheck recover!\n", gpu->name);

	fence = cur_ring->memptrs->fence + 1;



	submit = find_submit(cur_ring, fence);

	submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1);

	if (submit) {

		struct task_struct *task;
@@ -309,9 +291,34 @@ static void recover_worker(struct work_struct *work) 


			dev_err(dev->dev, "%s: offending task: %s (%s)\n",

				gpu->name, task->comm, cmd);



			msm_rd_dump_submit(priv->hangrd, submit,

				"offending task: %s (%s)", task->comm, cmd);

		} else {

			msm_rd_dump_submit(priv->hangrd, submit, NULL);

		}

		rcu_read_unlock();

	}





	/*

	 * Update all the rings with the latest and greatest fence.. this

	 * needs to happen after msm_rd_dump_submit() to ensure that the

	 * bo's referenced by the offending submit are still around.

	 */

	for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) {

		struct msm_ringbuffer *ring = gpu->rb[i];



		uint32_t fence = ring->memptrs->fence;



		/*

		 * For the current (faulting?) ring/submit advance the fence by

		 * one more to clear the faulting submit

		 */

		if (ring == cur_ring)

			fence++;



		update_fences(gpu, ring, fence);

	}



	if (msm_gpu_active(gpu)) {