drivers/gpu/drm/amd/amdgpu/amdgpu_job.c - third_party/kernel - Git at Google

 /*
  * Copyright 2015 Advanced Micro Devices, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  *
  */
 #include <linux/kthread.h>
 #include <linux/wait.h>
 #include <linux/sched.h>

 #include <drm/drm_drv.h>

 #include "amdgpu.h"
 #include "amdgpu_trace.h"
 #include "amdgpu_reset.h"

 static enum drm_gpu_sched_stat amdgpu_job_timedout(struct drm_sched_job *s_job)
 {
 	struct amdgpu_ring *ring = to_amdgpu_ring(s_job->sched);
 	struct amdgpu_job *job = to_amdgpu_job(s_job);
 	struct amdgpu_task_info ti;
 	struct amdgpu_device *adev = ring->adev;
 	int idx;
 	int r;

 	if (!drm_dev_enter(adev_to_drm(adev), &idx)) {
 		DRM_INFO("%s - device unplugged skipping recovery on scheduler:%s",
 			 __func__, s_job->sched->name);

 		/* Effectively the job is aborted as the device is gone */
 		return DRM_GPU_SCHED_STAT_ENODEV;
 	}

 	memset(&ti, 0, sizeof(struct amdgpu_task_info));
 	adev->job_hang = true;

 	if (amdgpu_gpu_recovery &&
 	    amdgpu_ring_soft_recovery(ring, job->vmid, s_job->s_fence->parent)) {
 		DRM_ERROR("ring %s timeout, but soft recovered\n",
 			  s_job->sched->name);
 		goto exit;
 	}

 	amdgpu_vm_get_task_info(ring->adev, job->pasid, &ti);
 	DRM_ERROR("ring %s timeout, signaled seq=%u, emitted seq=%u\n",
 		  job->base.sched->name, atomic_read(&ring->fence_drv.last_seq),
 		  ring->fence_drv.sync_seq);
 	DRM_ERROR("Process information: process %s pid %d thread %s pid %d\n",
 		  ti.process_name, ti.tgid, ti.task_name, ti.pid);

 	dma_fence_set_error(&s_job->s_fence->finished, -ETIME);

 	if (amdgpu_device_should_recover_gpu(ring->adev)) {
 		struct amdgpu_reset_context reset_context;
 		memset(&reset_context, 0, sizeof(reset_context));

 		reset_context.method = AMD_RESET_METHOD_NONE;
 		reset_context.reset_req_dev = adev;
 		clear_bit(AMDGPU_NEED_FULL_RESET, &reset_context.flags);

 		r = amdgpu_device_gpu_recover(ring->adev, job, &reset_context);
 		if (r)
 			DRM_ERROR("GPU Recovery Failed: %d\n", r);
 	} else {
 		drm_sched_suspend_timeout(&ring->sched);
 		if (amdgpu_sriov_vf(adev))
 			adev->virt.tdr_debug = true;
 	}

 exit:
 	adev->job_hang = false;
 	drm_dev_exit(idx);
 	return DRM_GPU_SCHED_STAT_NOMINAL;
 }

 int amdgpu_job_alloc(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 		     struct drm_sched_entity *entity, void *owner,
 		     unsigned int num_ibs, struct amdgpu_job **job)
 {
 	if (num_ibs == 0)
 		return -EINVAL;

 	*job = kzalloc(struct_size(*job, ibs, num_ibs), GFP_KERNEL);
 	if (!*job)
 		return -ENOMEM;

 	/*
 	 * Initialize the scheduler to at least some ring so that we always
 	 * have a pointer to adev.
 	 */
 	(*job)->base.sched = &adev->rings[0]->sched;
 	(*job)->vm = vm;

 	amdgpu_sync_create(&(*job)->explicit_sync);
 	(*job)->generation = amdgpu_vm_generation(adev, vm);
 	(*job)->vm_pd_addr = AMDGPU_BO_INVALID_OFFSET;

 	if (!entity)
 		return 0;

 	return drm_sched_job_init(&(*job)->base, entity, owner);
 }

 int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev,
 			     struct drm_sched_entity *entity, void *owner,
 			     size_t size, enum amdgpu_ib_pool_type pool_type,
 			     struct amdgpu_job **job)
 {
 	int r;

 	r = amdgpu_job_alloc(adev, NULL, entity, owner, 1, job);
 	if (r)
 		return r;

 	(*job)->num_ibs = 1;
 	r = amdgpu_ib_get(adev, NULL, size, pool_type, &(*job)->ibs[0]);
 	if (r) {
 		if (entity)
 			drm_sched_job_cleanup(&(*job)->base);
 		kfree(*job);
 	}

 	return r;
 }

 void amdgpu_job_set_resources(struct amdgpu_job *job, struct amdgpu_bo *gds,
 			      struct amdgpu_bo *gws, struct amdgpu_bo *oa)
 {
 	if (gds) {
 		job->gds_base = amdgpu_bo_gpu_offset(gds) >> PAGE_SHIFT;
 		job->gds_size = amdgpu_bo_size(gds) >> PAGE_SHIFT;
 	}
 	if (gws) {
 		job->gws_base = amdgpu_bo_gpu_offset(gws) >> PAGE_SHIFT;
 		job->gws_size = amdgpu_bo_size(gws) >> PAGE_SHIFT;
 	}
 	if (oa) {
 		job->oa_base = amdgpu_bo_gpu_offset(oa) >> PAGE_SHIFT;
 		job->oa_size = amdgpu_bo_size(oa) >> PAGE_SHIFT;
 	}
 }

 void amdgpu_job_free_resources(struct amdgpu_job *job)
 {
 	struct dma_fence *f;
 	unsigned i;

 	/* Check if any fences where initialized */
 	if (job->base.s_fence && job->base.s_fence->finished.ops)
 		f = &job->base.s_fence->finished;
 	else if (job->hw_fence.ops)
 		f = &job->hw_fence;
 	else
 		f = NULL;

 	for (i = 0; i < job->num_ibs; ++i)
 		amdgpu_ib_free(NULL, &job->ibs[i], f);
 }

 static void amdgpu_job_free_cb(struct drm_sched_job *s_job)
 {
 	struct amdgpu_job *job = to_amdgpu_job(s_job);

 	drm_sched_job_cleanup(s_job);

 	amdgpu_sync_free(&job->explicit_sync);

 	/* only put the hw fence if has embedded fence */
 	if (!job->hw_fence.ops)
 		kfree(job);
 	else
 		dma_fence_put(&job->hw_fence);
 }

 void amdgpu_job_set_gang_leader(struct amdgpu_job *job,
 				struct amdgpu_job *leader)
 {
 	struct dma_fence *fence = &leader->base.s_fence->scheduled;

 	WARN_ON(job->gang_submit);

 	/*
 	 * Don't add a reference when we are the gang leader to avoid circle
 	 * dependency.
 	 */
 	if (job != leader)
 		dma_fence_get(fence);
 	job->gang_submit = fence;
 }

 void amdgpu_job_free(struct amdgpu_job *job)
 {
 	if (job->base.entity)
 		drm_sched_job_cleanup(&job->base);

 	amdgpu_job_free_resources(job);
 	amdgpu_sync_free(&job->explicit_sync);
 	if (job->gang_submit != &job->base.s_fence->scheduled)
 		dma_fence_put(job->gang_submit);

 	if (!job->hw_fence.ops)
 		kfree(job);
 	else
 		dma_fence_put(&job->hw_fence);
 }

 struct dma_fence *amdgpu_job_submit(struct amdgpu_job *job)
 {
 	struct dma_fence *f;

 	drm_sched_job_arm(&job->base);
 	f = dma_fence_get(&job->base.s_fence->finished);
 	amdgpu_job_free_resources(job);
 	drm_sched_entity_push_job(&job->base);

 	return f;
 }

 int amdgpu_job_submit_direct(struct amdgpu_job *job, struct amdgpu_ring *ring,
 			     struct dma_fence **fence)
 {
 	int r;

 	job->base.sched = &ring->sched;
 	r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs, job, fence);

 	if (r)
 		return r;

 	amdgpu_job_free(job);
 	return 0;
 }

 static struct dma_fence *
 amdgpu_job_prepare_job(struct drm_sched_job *sched_job,
 		      struct drm_sched_entity *s_entity)
 {
 	struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched);
 	struct amdgpu_job *job = to_amdgpu_job(sched_job);
 	struct dma_fence *fence = NULL;
 	int r;

 	r = drm_sched_entity_error(s_entity);
 	if (r)
 		goto error;

 	if (!fence && job->gang_submit)
 		fence = amdgpu_device_switch_gang(ring->adev, job->gang_submit);

 	while (!fence && job->vm && !job->vmid) {
 		r = amdgpu_vmid_grab(job->vm, ring, job, &fence);
 		if (r) {
 			DRM_ERROR("Error getting VM ID (%d)\n", r);
 			goto error;
 		}
 	}

 	return fence;

 error:
 	dma_fence_set_error(&job->base.s_fence->finished, r);
 	return NULL;
 }

 static struct dma_fence *amdgpu_job_run(struct drm_sched_job *sched_job)
 {
 	struct amdgpu_ring *ring = to_amdgpu_ring(sched_job->sched);
 	struct amdgpu_device *adev = ring->adev;
 	struct dma_fence *fence = NULL, *finished;
 	struct amdgpu_job *job;
 	int r = 0;

 	job = to_amdgpu_job(sched_job);
 	finished = &job->base.s_fence->finished;

 	trace_amdgpu_sched_run_job(job);

 	/* Skip job if VRAM is lost and never resubmit gangs */
 	if (job->generation != amdgpu_vm_generation(adev, job->vm) ||
 	    (job->job_run_counter && job->gang_submit))
 		dma_fence_set_error(finished, -ECANCELED);

 	if (finished->error < 0) {
 		dev_dbg(adev->dev, "Skip scheduling IBs in ring(%s)",
 			ring->name);
 	} else {
 		r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs, job,
 				       &fence);
 		if (r)
 			dev_err(adev->dev,
 				"Error scheduling IBs (%d) in ring(%s)", r,
 				ring->name);
 	}

 	job->job_run_counter++;
 	amdgpu_job_free_resources(job);

 	fence = r ? ERR_PTR(r) : fence;
 	return fence;
 }

 #define to_drm_sched_job(sched_job)		\
 		container_of((sched_job), struct drm_sched_job, queue_node)

 void amdgpu_job_stop_all_jobs_on_sched(struct drm_gpu_scheduler *sched)
 {
 	struct drm_sched_job *s_job;
 	struct drm_sched_entity *s_entity = NULL;
 	int i;

 	/* Signal all jobs not yet scheduled */
 	for (i = DRM_SCHED_PRIORITY_COUNT - 1; i >= DRM_SCHED_PRIORITY_MIN; i--) {
 		struct drm_sched_rq *rq = &sched->sched_rq[i];
 		spin_lock(&rq->lock);
 		list_for_each_entry(s_entity, &rq->entities, list) {
 			while ((s_job = to_drm_sched_job(spsc_queue_pop(&s_entity->job_queue)))) {
 				struct drm_sched_fence *s_fence = s_job->s_fence;

 				dma_fence_signal(&s_fence->scheduled);
 				dma_fence_set_error(&s_fence->finished, -EHWPOISON);
 				dma_fence_signal(&s_fence->finished);
 			}
 		}
 		spin_unlock(&rq->lock);
 	}

 	/* Signal all jobs already scheduled to HW */
 	list_for_each_entry(s_job, &sched->pending_list, list) {
 		struct drm_sched_fence *s_fence = s_job->s_fence;

 		dma_fence_set_error(&s_fence->finished, -EHWPOISON);
 		dma_fence_signal(&s_fence->finished);
 	}
 }

 const struct drm_sched_backend_ops amdgpu_sched_ops = {
 	.prepare_job = amdgpu_job_prepare_job,
 	.run_job = amdgpu_job_run,
 	.timedout_job = amdgpu_job_timedout,
 	.free_job = amdgpu_job_free_cb
 };
	/*
	* Copyright 2015 Advanced Micro Devices, Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	*
	*/
	#include <linux/kthread.h>
	#include <linux/wait.h>
	#include <linux/sched.h>

	#include <drm/drm_drv.h>

	#include "amdgpu.h"
	#include "amdgpu_trace.h"
	#include "amdgpu_reset.h"

	static enum drm_gpu_sched_stat amdgpu_job_timedout(struct drm_sched_job *s_job)
	{
	struct amdgpu_ring *ring = to_amdgpu_ring(s_job->sched);
	struct amdgpu_job *job = to_amdgpu_job(s_job);
	struct amdgpu_task_info ti;
	struct amdgpu_device *adev = ring->adev;
	int idx;
	int r;

	if (!drm_dev_enter(adev_to_drm(adev), &idx)) {
	DRM_INFO("%s - device unplugged skipping recovery on scheduler:%s",
	__func__, s_job->sched->name);

	/* Effectively the job is aborted as the device is gone */
	return DRM_GPU_SCHED_STAT_ENODEV;
	}

	memset(&ti, 0, sizeof(struct amdgpu_task_info));
	adev->job_hang = true;

	if (amdgpu_gpu_recovery &&
	amdgpu_ring_soft_recovery(ring, job->vmid, s_job->s_fence->parent)) {
	DRM_ERROR("ring %s timeout, but soft recovered\n",
	s_job->sched->name);
	goto exit;
	}

	amdgpu_vm_get_task_info(ring->adev, job->pasid, &ti);
	DRM_ERROR("ring %s timeout, signaled seq=%u, emitted seq=%u\n",
	job->base.sched->name, atomic_read(&ring->fence_drv.last_seq),
	ring->fence_drv.sync_seq);
	DRM_ERROR("Process information: process %s pid %d thread %s pid %d\n",
	ti.process_name, ti.tgid, ti.task_name, ti.pid);

	dma_fence_set_error(&s_job->s_fence->finished, -ETIME);

	if (amdgpu_device_should_recover_gpu(ring->adev)) {
	struct amdgpu_reset_context reset_context;
	memset(&reset_context, 0, sizeof(reset_context));

	reset_context.method = AMD_RESET_METHOD_NONE;
	reset_context.reset_req_dev = adev;
	clear_bit(AMDGPU_NEED_FULL_RESET, &reset_context.flags);

	r = amdgpu_device_gpu_recover(ring->adev, job, &reset_context);
	if (r)
	DRM_ERROR("GPU Recovery Failed: %d\n", r);
	} else {
	drm_sched_suspend_timeout(&ring->sched);
	if (amdgpu_sriov_vf(adev))
	adev->virt.tdr_debug = true;
	}

	exit:
	adev->job_hang = false;
	drm_dev_exit(idx);
	return DRM_GPU_SCHED_STAT_NOMINAL;
	}

	int amdgpu_job_alloc(struct amdgpu_device adev, struct amdgpu_vm vm,
	struct drm_sched_entity entity, void owner,
	unsigned int num_ibs, struct amdgpu_job **job)
	{
	if (num_ibs == 0)
	return -EINVAL;

	job = kzalloc(struct_size(job, ibs, num_ibs), GFP_KERNEL);
	if (!*job)
	return -ENOMEM;

	/*
	* Initialize the scheduler to at least some ring so that we always
	* have a pointer to adev.
	*/
	(*job)->base.sched = &adev->rings[0]->sched;
	(*job)->vm = vm;

	amdgpu_sync_create(&(*job)->explicit_sync);
	(*job)->generation = amdgpu_vm_generation(adev, vm);
	(*job)->vm_pd_addr = AMDGPU_BO_INVALID_OFFSET;

	if (!entity)
	return 0;

	return drm_sched_job_init(&(*job)->base, entity, owner);
	}

	int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev,
	struct drm_sched_entity entity, void owner,
	size_t size, enum amdgpu_ib_pool_type pool_type,
	struct amdgpu_job **job)
	{
	int r;

	r = amdgpu_job_alloc(adev, NULL, entity, owner, 1, job);
	if (r)
	return r;

	(*job)->num_ibs = 1;
	r = amdgpu_ib_get(adev, NULL, size, pool_type, &(*job)->ibs[0]);
	if (r) {
	if (entity)
	drm_sched_job_cleanup(&(*job)->base);
	kfree(*job);
	}

	return r;
	}

	void amdgpu_job_set_resources(struct amdgpu_job job, struct amdgpu_bo gds,
	struct amdgpu_bo gws, struct amdgpu_bo oa)
	{
	if (gds) {
	job->gds_base = amdgpu_bo_gpu_offset(gds) >> PAGE_SHIFT;
	job->gds_size = amdgpu_bo_size(gds) >> PAGE_SHIFT;
	}
	if (gws) {
	job->gws_base = amdgpu_bo_gpu_offset(gws) >> PAGE_SHIFT;
	job->gws_size = amdgpu_bo_size(gws) >> PAGE_SHIFT;
	}
	if (oa) {
	job->oa_base = amdgpu_bo_gpu_offset(oa) >> PAGE_SHIFT;
	job->oa_size = amdgpu_bo_size(oa) >> PAGE_SHIFT;
	}
	}

	void amdgpu_job_free_resources(struct amdgpu_job *job)
	{
	struct dma_fence *f;
	unsigned i;

	/* Check if any fences where initialized */
	if (job->base.s_fence && job->base.s_fence->finished.ops)
	f = &job->base.s_fence->finished;
	else if (job->hw_fence.ops)
	f = &job->hw_fence;
	else
	f = NULL;

	for (i = 0; i < job->num_ibs; ++i)
	amdgpu_ib_free(NULL, &job->ibs[i], f);
	}

	static void amdgpu_job_free_cb(struct drm_sched_job *s_job)
	{
	struct amdgpu_job *job = to_amdgpu_job(s_job);

	drm_sched_job_cleanup(s_job);

	amdgpu_sync_free(&job->explicit_sync);

	/* only put the hw fence if has embedded fence */
	if (!job->hw_fence.ops)
	kfree(job);
	else
	dma_fence_put(&job->hw_fence);
	}

	void amdgpu_job_set_gang_leader(struct amdgpu_job *job,
	struct amdgpu_job *leader)
	{
	struct dma_fence *fence = &leader->base.s_fence->scheduled;

	WARN_ON(job->gang_submit);

	/*
	* Don't add a reference when we are the gang leader to avoid circle
	* dependency.
	*/
	if (job != leader)
	dma_fence_get(fence);
	job->gang_submit = fence;
	}

	void amdgpu_job_free(struct amdgpu_job *job)
	{
	if (job->base.entity)
	drm_sched_job_cleanup(&job->base);

	amdgpu_job_free_resources(job);
	amdgpu_sync_free(&job->explicit_sync);
	if (job->gang_submit != &job->base.s_fence->scheduled)
	dma_fence_put(job->gang_submit);

	if (!job->hw_fence.ops)
	kfree(job);
	else
	dma_fence_put(&job->hw_fence);
	}

	struct dma_fence amdgpu_job_submit(struct amdgpu_job job)
	{
	struct dma_fence *f;

	drm_sched_job_arm(&job->base);
	f = dma_fence_get(&job->base.s_fence->finished);
	amdgpu_job_free_resources(job);
	drm_sched_entity_push_job(&job->base);

	return f;
	}

	int amdgpu_job_submit_direct(struct amdgpu_job job, struct amdgpu_ring ring,
	struct dma_fence **fence)
	{
	int r;

	job->base.sched = &ring->sched;
	r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs, job, fence);

	if (r)
	return r;

	amdgpu_job_free(job);
	return 0;
	}

	static struct dma_fence *
	amdgpu_job_prepare_job(struct drm_sched_job *sched_job,
	struct drm_sched_entity *s_entity)
	{
	struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched);
	struct amdgpu_job *job = to_amdgpu_job(sched_job);
	struct dma_fence *fence = NULL;
	int r;

	r = drm_sched_entity_error(s_entity);
	if (r)
	goto error;

	if (!fence && job->gang_submit)
	fence = amdgpu_device_switch_gang(ring->adev, job->gang_submit);

	while (!fence && job->vm && !job->vmid) {
	r = amdgpu_vmid_grab(job->vm, ring, job, &fence);
	if (r) {
	DRM_ERROR("Error getting VM ID (%d)\n", r);
	goto error;
	}
	}

	return fence;

	error:
	dma_fence_set_error(&job->base.s_fence->finished, r);
	return NULL;
	}

	static struct dma_fence amdgpu_job_run(struct drm_sched_job sched_job)
	{
	struct amdgpu_ring *ring = to_amdgpu_ring(sched_job->sched);
	struct amdgpu_device *adev = ring->adev;
	struct dma_fence fence = NULL, finished;
	struct amdgpu_job *job;
	int r = 0;

	job = to_amdgpu_job(sched_job);
	finished = &job->base.s_fence->finished;

	trace_amdgpu_sched_run_job(job);

	/* Skip job if VRAM is lost and never resubmit gangs */
	if (job->generation != amdgpu_vm_generation(adev, job->vm) \|\|
	(job->job_run_counter && job->gang_submit))
	dma_fence_set_error(finished, -ECANCELED);

	if (finished->error < 0) {
	dev_dbg(adev->dev, "Skip scheduling IBs in ring(%s)",
	ring->name);
	} else {
	r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs, job,
	&fence);
	if (r)
	dev_err(adev->dev,
	"Error scheduling IBs (%d) in ring(%s)", r,
	ring->name);
	}

	job->job_run_counter++;
	amdgpu_job_free_resources(job);

	fence = r ? ERR_PTR(r) : fence;
	return fence;
	}

	#define to_drm_sched_job(sched_job) \
	container_of((sched_job), struct drm_sched_job, queue_node)

	void amdgpu_job_stop_all_jobs_on_sched(struct drm_gpu_scheduler *sched)
	{
	struct drm_sched_job *s_job;
	struct drm_sched_entity *s_entity = NULL;
	int i;

	/* Signal all jobs not yet scheduled */
	for (i = DRM_SCHED_PRIORITY_COUNT - 1; i >= DRM_SCHED_PRIORITY_MIN; i--) {
	struct drm_sched_rq *rq = &sched->sched_rq[i];
	spin_lock(&rq->lock);
	list_for_each_entry(s_entity, &rq->entities, list) {
	while ((s_job = to_drm_sched_job(spsc_queue_pop(&s_entity->job_queue)))) {
	struct drm_sched_fence *s_fence = s_job->s_fence;

	dma_fence_signal(&s_fence->scheduled);
	dma_fence_set_error(&s_fence->finished, -EHWPOISON);
	dma_fence_signal(&s_fence->finished);
	}
	}
	spin_unlock(&rq->lock);
	}

	/* Signal all jobs already scheduled to HW */
	list_for_each_entry(s_job, &sched->pending_list, list) {
	struct drm_sched_fence *s_fence = s_job->s_fence;

	dma_fence_set_error(&s_fence->finished, -EHWPOISON);
	dma_fence_signal(&s_fence->finished);
	}
	}

	const struct drm_sched_backend_ops amdgpu_sched_ops = {
	.prepare_job = amdgpu_job_prepare_job,
	.run_job = amdgpu_job_run,
	.timedout_job = amdgpu_job_timedout,
	.free_job = amdgpu_job_free_cb
	};