drivers/gpu/drm/amd/amdgpu/amdgpu_job.c - linux/torvalds/linux - 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 "amdgpu.h"
 #include "amdgpu_trace.h"

 static void 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;

 	memset(&ti, 0, sizeof(struct amdgpu_task_info));

 	if (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);
 		return;
 	}

 	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);

 	if (amdgpu_device_should_recover_gpu(ring->adev))
 		amdgpu_device_gpu_recover(ring->adev, job);
 	else
 		drm_sched_suspend_timeout(&ring->sched);
 }

 int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
 		     struct amdgpu_job **job, struct amdgpu_vm *vm)
 {
 	size_t size = sizeof(struct amdgpu_job);

 	if (num_ibs == 0)
 		return -EINVAL;

 	size += sizeof(struct amdgpu_ib) * num_ibs;

 	*job = kzalloc(size, 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;
 	(*job)->ibs = (void *)&(*job)[1];
 	(*job)->num_ibs = num_ibs;

 	amdgpu_sync_create(&(*job)->sync);
 	amdgpu_sync_create(&(*job)->sched_sync);
 	(*job)->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
 	(*job)->vm_pd_addr = AMDGPU_BO_INVALID_OFFSET;

 	return 0;
 }

 int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev, unsigned size,
 			     struct amdgpu_job **job)
 {
 	int r;

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

 	r = amdgpu_ib_get(adev, NULL, size, &(*job)->ibs[0]);
 	if (r)
 		kfree(*job);

 	return r;
 }

 void amdgpu_job_free_resources(struct amdgpu_job *job)
 {
 	struct amdgpu_ring *ring = to_amdgpu_ring(job->base.sched);
 	struct dma_fence *f;
 	unsigned i;

 	/* use sched fence if available */
 	f = job->base.s_fence ? &job->base.s_fence->finished : job->fence;

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

 static void amdgpu_job_free_cb(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);

 	drm_sched_job_cleanup(s_job);

 	amdgpu_ring_priority_put(ring, s_job->s_priority);
 	dma_fence_put(job->fence);
 	amdgpu_sync_free(&job->sync);
 	amdgpu_sync_free(&job->sched_sync);
 	kfree(job);
 }

 void amdgpu_job_free(struct amdgpu_job *job)
 {
 	amdgpu_job_free_resources(job);

 	dma_fence_put(job->fence);
 	amdgpu_sync_free(&job->sync);
 	amdgpu_sync_free(&job->sched_sync);
 	kfree(job);
 }

 int amdgpu_job_submit(struct amdgpu_job *job, struct drm_sched_entity *entity,
 		      void *owner, struct dma_fence **f)
 {
 	enum drm_sched_priority priority;
 	struct amdgpu_ring *ring;
 	int r;

 	if (!f)
 		return -EINVAL;

 	r = drm_sched_job_init(&job->base, entity, owner);
 	if (r)
 		return r;

 	job->owner = owner;
 	*f = dma_fence_get(&job->base.s_fence->finished);
 	amdgpu_job_free_resources(job);
 	priority = job->base.s_priority;
 	drm_sched_entity_push_job(&job->base, entity);

 	ring = to_amdgpu_ring(entity->rq->sched);
 	amdgpu_ring_priority_get(ring, priority);

 	return 0;
 }

 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, NULL, fence);
 	job->fence = dma_fence_get(*fence);
 	if (r)
 		return r;

 	amdgpu_job_free(job);
 	return 0;
 }

 static struct dma_fence *amdgpu_job_dependency(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 amdgpu_vm *vm = job->vm;
 	struct dma_fence *fence;
 	bool explicit = false;
 	int r;

 	fence = amdgpu_sync_get_fence(&job->sync, &explicit);
 	if (fence && explicit) {
 		if (drm_sched_dependency_optimized(fence, s_entity)) {
 			r = amdgpu_sync_fence(ring->adev, &job->sched_sync,
 					      fence, false);
 			if (r)
 				DRM_ERROR("Error adding fence (%d)\n", r);
 		}
 	}

 	while (fence == NULL && vm && !job->vmid) {
 		r = amdgpu_vmid_grab(vm, ring, &job->sync,
 				     &job->base.s_fence->finished,
 				     job);
 		if (r)
 			DRM_ERROR("Error getting VM ID (%d)\n", r);

 		fence = amdgpu_sync_get_fence(&job->sync, NULL);
 	}

 	return fence;
 }

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

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

 	BUG_ON(amdgpu_sync_peek_fence(&job->sync, NULL));

 	trace_amdgpu_sched_run_job(job);

 	if (job->vram_lost_counter != atomic_read(&ring->adev->vram_lost_counter))
 		dma_fence_set_error(finished, -ECANCELED);/* skip IB as well if VRAM lost */

 	if (finished->error < 0) {
 		DRM_INFO("Skip scheduling IBs!\n");
 	} else {
 		r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs, job,
 				       &fence);
 		if (r)
 			DRM_ERROR("Error scheduling IBs (%d)\n", r);
 	}
 	/* if gpu reset, hw fence will be replaced here */
 	dma_fence_put(job->fence);
 	job->fence = dma_fence_get(fence);

 	amdgpu_job_free_resources(job);
 	return fence;
 }

 const struct drm_sched_backend_ops amdgpu_sched_ops = {
 	.dependency = amdgpu_job_dependency,
 	.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 "amdgpu.h"
	#include "amdgpu_trace.h"

	static void 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;

	memset(&ti, 0, sizeof(struct amdgpu_task_info));

	if (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);
	return;
	}

	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);

	if (amdgpu_device_should_recover_gpu(ring->adev))
	amdgpu_device_gpu_recover(ring->adev, job);
	else
	drm_sched_suspend_timeout(&ring->sched);
	}

	int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
	struct amdgpu_job *job, struct amdgpu_vm vm)
	{
	size_t size = sizeof(struct amdgpu_job);

	if (num_ibs == 0)
	return -EINVAL;

	size += sizeof(struct amdgpu_ib) * num_ibs;

	*job = kzalloc(size, 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;
	(job)->ibs = (void )&(*job)[1];
	(*job)->num_ibs = num_ibs;

	amdgpu_sync_create(&(*job)->sync);
	amdgpu_sync_create(&(*job)->sched_sync);
	(*job)->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
	(*job)->vm_pd_addr = AMDGPU_BO_INVALID_OFFSET;

	return 0;
	}

	int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev, unsigned size,
	struct amdgpu_job **job)
	{
	int r;

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

	r = amdgpu_ib_get(adev, NULL, size, &(*job)->ibs[0]);
	if (r)
	kfree(*job);

	return r;
	}

	void amdgpu_job_free_resources(struct amdgpu_job *job)
	{
	struct amdgpu_ring *ring = to_amdgpu_ring(job->base.sched);
	struct dma_fence *f;
	unsigned i;

	/* use sched fence if available */
	f = job->base.s_fence ? &job->base.s_fence->finished : job->fence;

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

	static void amdgpu_job_free_cb(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);

	drm_sched_job_cleanup(s_job);

	amdgpu_ring_priority_put(ring, s_job->s_priority);
	dma_fence_put(job->fence);
	amdgpu_sync_free(&job->sync);
	amdgpu_sync_free(&job->sched_sync);
	kfree(job);
	}

	void amdgpu_job_free(struct amdgpu_job *job)
	{
	amdgpu_job_free_resources(job);

	dma_fence_put(job->fence);
	amdgpu_sync_free(&job->sync);
	amdgpu_sync_free(&job->sched_sync);
	kfree(job);
	}

	int amdgpu_job_submit(struct amdgpu_job job, struct drm_sched_entity entity,
	void owner, struct dma_fence *f)
	{
	enum drm_sched_priority priority;
	struct amdgpu_ring *ring;
	int r;

	if (!f)
	return -EINVAL;

	r = drm_sched_job_init(&job->base, entity, owner);
	if (r)
	return r;

	job->owner = owner;
	*f = dma_fence_get(&job->base.s_fence->finished);
	amdgpu_job_free_resources(job);
	priority = job->base.s_priority;
	drm_sched_entity_push_job(&job->base, entity);

	ring = to_amdgpu_ring(entity->rq->sched);
	amdgpu_ring_priority_get(ring, priority);

	return 0;
	}

	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, NULL, fence);
	job->fence = dma_fence_get(*fence);
	if (r)
	return r;

	amdgpu_job_free(job);
	return 0;
	}

	static struct dma_fence amdgpu_job_dependency(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 amdgpu_vm *vm = job->vm;
	struct dma_fence *fence;
	bool explicit = false;
	int r;

	fence = amdgpu_sync_get_fence(&job->sync, &explicit);
	if (fence && explicit) {
	if (drm_sched_dependency_optimized(fence, s_entity)) {
	r = amdgpu_sync_fence(ring->adev, &job->sched_sync,
	fence, false);
	if (r)
	DRM_ERROR("Error adding fence (%d)\n", r);
	}
	}

	while (fence == NULL && vm && !job->vmid) {
	r = amdgpu_vmid_grab(vm, ring, &job->sync,
	&job->base.s_fence->finished,
	job);
	if (r)
	DRM_ERROR("Error getting VM ID (%d)\n", r);

	fence = amdgpu_sync_get_fence(&job->sync, NULL);
	}

	return fence;
	}

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

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

	BUG_ON(amdgpu_sync_peek_fence(&job->sync, NULL));

	trace_amdgpu_sched_run_job(job);

	if (job->vram_lost_counter != atomic_read(&ring->adev->vram_lost_counter))
	dma_fence_set_error(finished, -ECANCELED);/* skip IB as well if VRAM lost */

	if (finished->error < 0) {
	DRM_INFO("Skip scheduling IBs!\n");
	} else {
	r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs, job,
	&fence);
	if (r)
	DRM_ERROR("Error scheduling IBs (%d)\n", r);
	}
	/* if gpu reset, hw fence will be replaced here */
	dma_fence_put(job->fence);
	job->fence = dma_fence_get(fence);

	amdgpu_job_free_resources(job);
	return fence;
	}

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