drm: move amd_gpu_scheduler into common location

This moves and renames the AMDGPU scheduler to a common location in DRM
in order to facilitate re-use by other drivers. This is mostly a straight
forward rename with no code changes.

One notable exception is the function to_drm_sched_fence(), which is no
longer a inline header function to avoid the need to export the
drm_sched_fence_ops_scheduled and drm_sched_fence_ops_finished structures.

Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 0 insertions, 744 deletions

diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
deleted file mode 100644
index dcb987e6d94a..000000000000
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
+++ /dev/null
@@ -1,744 +0,0 @@
-/*
- * 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 <uapi/linux/sched/types.h>
-#include <drm/drmP.h>
-#include "gpu_scheduler.h"
-
-#include "spsc_queue.h"
-
-#define CREATE_TRACE_POINTS
-#include "gpu_sched_trace.h"
-
-#define to_amd_sched_job(sched_job)		\
-		container_of((sched_job), struct amd_sched_job, queue_node)
-
-static bool amd_sched_entity_is_ready(struct amd_sched_entity *entity);
-static void amd_sched_wakeup(struct amd_gpu_scheduler *sched);
-static void amd_sched_process_job(struct dma_fence *f, struct dma_fence_cb *cb);
-
-/* Initialize a given run queue struct */
-static void amd_sched_rq_init(struct amd_sched_rq *rq)
-{
-	spin_lock_init(&rq->lock);
-	INIT_LIST_HEAD(&rq->entities);
-	rq->current_entity = NULL;
-}
-
-static void amd_sched_rq_add_entity(struct amd_sched_rq *rq,
-				    struct amd_sched_entity *entity)
-{
-	if (!list_empty(&entity->list))
-		return;
-	spin_lock(&rq->lock);
-	list_add_tail(&entity->list, &rq->entities);
-	spin_unlock(&rq->lock);
-}
-
-static void amd_sched_rq_remove_entity(struct amd_sched_rq *rq,
-				       struct amd_sched_entity *entity)
-{
-	if (list_empty(&entity->list))
-		return;
-	spin_lock(&rq->lock);
-	list_del_init(&entity->list);
-	if (rq->current_entity == entity)
-		rq->current_entity = NULL;
-	spin_unlock(&rq->lock);
-}
-
-/**
- * Select an entity which could provide a job to run
- *
- * @rq		The run queue to check.
- *
- * Try to find a ready entity, returns NULL if none found.
- */
-static struct amd_sched_entity *
-amd_sched_rq_select_entity(struct amd_sched_rq *rq)
-{
-	struct amd_sched_entity *entity;
-
-	spin_lock(&rq->lock);
-
-	entity = rq->current_entity;
-	if (entity) {
-		list_for_each_entry_continue(entity, &rq->entities, list) {
-			if (amd_sched_entity_is_ready(entity)) {
-				rq->current_entity = entity;
-				spin_unlock(&rq->lock);
-				return entity;
-			}
-		}
-	}
-
-	list_for_each_entry(entity, &rq->entities, list) {
-
-		if (amd_sched_entity_is_ready(entity)) {
-			rq->current_entity = entity;
-			spin_unlock(&rq->lock);
-			return entity;
-		}
-
-		if (entity == rq->current_entity)
-			break;
-	}
-
-	spin_unlock(&rq->lock);
-
-	return NULL;
-}
-
-/**
- * Init a context entity used by scheduler when submit to HW ring.
- *
- * @sched	The pointer to the scheduler
- * @entity	The pointer to a valid amd_sched_entity
- * @rq		The run queue this entity belongs
- * @kernel	If this is an entity for the kernel
- * @jobs	The max number of jobs in the job queue
- *
- * return 0 if succeed. negative error code on failure
-*/
-int amd_sched_entity_init(struct amd_gpu_scheduler *sched,
-			  struct amd_sched_entity *entity,
-			  struct amd_sched_rq *rq,
-			  uint32_t jobs, atomic_t *guilty)
-{
-	if (!(sched && entity && rq))
-		return -EINVAL;
-
-	memset(entity, 0, sizeof(struct amd_sched_entity));
-	INIT_LIST_HEAD(&entity->list);
-	entity->rq = rq;
-	entity->sched = sched;
-	entity->guilty = guilty;
-
-	spin_lock_init(&entity->rq_lock);
-	spin_lock_init(&entity->queue_lock);
-	spsc_queue_init(&entity->job_queue);
-
-	atomic_set(&entity->fence_seq, 0);
-	entity->fence_context = dma_fence_context_alloc(2);
-
-	return 0;
-}
-
-/**
- * Query if entity is initialized
- *
- * @sched       Pointer to scheduler instance
- * @entity	The pointer to a valid scheduler entity
- *
- * return true if entity is initialized, false otherwise
-*/
-static bool amd_sched_entity_is_initialized(struct amd_gpu_scheduler *sched,
-					    struct amd_sched_entity *entity)
-{
-	return entity->sched == sched &&
-		entity->rq != NULL;
-}
-
-/**
- * Check if entity is idle
- *
- * @entity	The pointer to a valid scheduler entity
- *
- * Return true if entity don't has any unscheduled jobs.
- */
-static bool amd_sched_entity_is_idle(struct amd_sched_entity *entity)
-{
-	rmb();
-	if (spsc_queue_peek(&entity->job_queue) == NULL)
-		return true;
-
-	return false;
-}
-
-/**
- * Check if entity is ready
- *
- * @entity	The pointer to a valid scheduler entity
- *
- * Return true if entity could provide a job.
- */
-static bool amd_sched_entity_is_ready(struct amd_sched_entity *entity)
-{
-	if (spsc_queue_peek(&entity->job_queue) == NULL)
-		return false;
-
-	if (READ_ONCE(entity->dependency))
-		return false;
-
-	return true;
-}
-
-/**
- * Destroy a context entity
- *
- * @sched       Pointer to scheduler instance
- * @entity	The pointer to a valid scheduler entity
- *
- * Cleanup and free the allocated resources.
- */
-void amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
-			   struct amd_sched_entity *entity)
-{
-	int r;
-
-	if (!amd_sched_entity_is_initialized(sched, entity))
-		return;
-	/**
-	 * The client will not queue more IBs during this fini, consume existing
-	 * queued IBs or discard them on SIGKILL
-	*/
-	if ((current->flags & PF_SIGNALED) && current->exit_code == SIGKILL)
-		r = -ERESTARTSYS;
-	else
-		r = wait_event_killable(sched->job_scheduled,
-					amd_sched_entity_is_idle(entity));
-	amd_sched_entity_set_rq(entity, NULL);
-	if (r) {
-		struct amd_sched_job *job;
-
-		/* Park the kernel for a moment to make sure it isn't processing
-		 * our enity.
-		 */
-		kthread_park(sched->thread);
-		kthread_unpark(sched->thread);
-		if (entity->dependency) {
-			dma_fence_remove_callback(entity->dependency,
-						  &entity->cb);
-			dma_fence_put(entity->dependency);
-			entity->dependency = NULL;
-		}
-
-		while ((job = to_amd_sched_job(spsc_queue_pop(&entity->job_queue)))) {
-			struct amd_sched_fence *s_fence = job->s_fence;
-			amd_sched_fence_scheduled(s_fence);
-			dma_fence_set_error(&s_fence->finished, -ESRCH);
-			amd_sched_fence_finished(s_fence);
-			WARN_ON(s_fence->parent);
-			dma_fence_put(&s_fence->finished);
-			sched->ops->free_job(job);
-		}
-	}
-}
-
-static void amd_sched_entity_wakeup(struct dma_fence *f, struct dma_fence_cb *cb)
-{
-	struct amd_sched_entity *entity =
-		container_of(cb, struct amd_sched_entity, cb);
-	entity->dependency = NULL;
-	dma_fence_put(f);
-	amd_sched_wakeup(entity->sched);
-}
-
-static void amd_sched_entity_clear_dep(struct dma_fence *f, struct dma_fence_cb *cb)
-{
-	struct amd_sched_entity *entity =
-		container_of(cb, struct amd_sched_entity, cb);
-	entity->dependency = NULL;
-	dma_fence_put(f);
-}
-
-void amd_sched_entity_set_rq(struct amd_sched_entity *entity,
-			     struct amd_sched_rq *rq)
-{
-	if (entity->rq == rq)
-		return;
-
-	spin_lock(&entity->rq_lock);
-
-	if (entity->rq)
-		amd_sched_rq_remove_entity(entity->rq, entity);
-
-	entity->rq = rq;
-	if (rq)
-		amd_sched_rq_add_entity(rq, entity);
-
-	spin_unlock(&entity->rq_lock);
-}
-
-bool amd_sched_dependency_optimized(struct dma_fence* fence,
-				    struct amd_sched_entity *entity)
-{
-	struct amd_gpu_scheduler *sched = entity->sched;
-	struct amd_sched_fence *s_fence;
-
-	if (!fence || dma_fence_is_signaled(fence))
-		return false;
-	if (fence->context == entity->fence_context)
-		return true;
-	s_fence = to_amd_sched_fence(fence);
-	if (s_fence && s_fence->sched == sched)
-		return true;
-
-	return false;
-}
-
-static bool amd_sched_entity_add_dependency_cb(struct amd_sched_entity *entity)
-{
-	struct amd_gpu_scheduler *sched = entity->sched;
-	struct dma_fence * fence = entity->dependency;
-	struct amd_sched_fence *s_fence;
-
-	if (fence->context == entity->fence_context) {
-		/* We can ignore fences from ourself */
-		dma_fence_put(entity->dependency);
-		return false;
-	}
-
-	s_fence = to_amd_sched_fence(fence);
-	if (s_fence && s_fence->sched == sched) {
-
-		/*
-		 * Fence is from the same scheduler, only need to wait for
-		 * it to be scheduled
-		 */
-		fence = dma_fence_get(&s_fence->scheduled);
-		dma_fence_put(entity->dependency);
-		entity->dependency = fence;
-		if (!dma_fence_add_callback(fence, &entity->cb,
-					    amd_sched_entity_clear_dep))
-			return true;
-
-		/* Ignore it when it is already scheduled */
-		dma_fence_put(fence);
-		return false;
-	}
-
-	if (!dma_fence_add_callback(entity->dependency, &entity->cb,
-				    amd_sched_entity_wakeup))
-		return true;
-
-	dma_fence_put(entity->dependency);
-	return false;
-}
-
-static struct amd_sched_job *
-amd_sched_entity_pop_job(struct amd_sched_entity *entity)
-{
-	struct amd_gpu_scheduler *sched = entity->sched;
-	struct amd_sched_job *sched_job = to_amd_sched_job(
-						spsc_queue_peek(&entity->job_queue));
-
-	if (!sched_job)
-		return NULL;
-
-	while ((entity->dependency = sched->ops->dependency(sched_job, entity)))
-		if (amd_sched_entity_add_dependency_cb(entity))
-			return NULL;
-
-	/* skip jobs from entity that marked guilty */
-	if (entity->guilty && atomic_read(entity->guilty))
-		dma_fence_set_error(&sched_job->s_fence->finished, -ECANCELED);
-
-	spsc_queue_pop(&entity->job_queue);
-	return sched_job;
-}
-
-/**
- * Submit a job to the job queue
- *
- * @sched_job		The pointer to job required to submit
- *
- * Returns 0 for success, negative error code otherwise.
- */
-void amd_sched_entity_push_job(struct amd_sched_job *sched_job,
-			       struct amd_sched_entity *entity)
-{
-	struct amd_gpu_scheduler *sched = sched_job->sched;
-	bool first = false;
-
-	trace_amd_sched_job(sched_job, entity);
-
-	spin_lock(&entity->queue_lock);
-	first = spsc_queue_push(&entity->job_queue, &sched_job->queue_node);
-
-	spin_unlock(&entity->queue_lock);
-
-	/* first job wakes up scheduler */
-	if (first) {
-		/* Add the entity to the run queue */
-		spin_lock(&entity->rq_lock);
-		amd_sched_rq_add_entity(entity->rq, entity);
-		spin_unlock(&entity->rq_lock);
-		amd_sched_wakeup(sched);
-	}
-}
-
-/* job_finish is called after hw fence signaled
- */
-static void amd_sched_job_finish(struct work_struct *work)
-{
-	struct amd_sched_job *s_job = container_of(work, struct amd_sched_job,
-						   finish_work);
-	struct amd_gpu_scheduler *sched = s_job->sched;
-
-	/* remove job from ring_mirror_list */
-	spin_lock(&sched->job_list_lock);
-	list_del_init(&s_job->node);
-	if (sched->timeout != MAX_SCHEDULE_TIMEOUT) {
-		struct amd_sched_job *next;
-
-		spin_unlock(&sched->job_list_lock);
-		cancel_delayed_work_sync(&s_job->work_tdr);
-		spin_lock(&sched->job_list_lock);
-
-		/* queue TDR for next job */
-		next = list_first_entry_or_null(&sched->ring_mirror_list,
-						struct amd_sched_job, node);
-
-		if (next)
-			schedule_delayed_work(&next->work_tdr, sched->timeout);
-	}
-	spin_unlock(&sched->job_list_lock);
-	dma_fence_put(&s_job->s_fence->finished);
-	sched->ops->free_job(s_job);
-}
-
-static void amd_sched_job_finish_cb(struct dma_fence *f,
-				    struct dma_fence_cb *cb)
-{
-	struct amd_sched_job *job = container_of(cb, struct amd_sched_job,
-						 finish_cb);
-	schedule_work(&job->finish_work);
-}
-
-static void amd_sched_job_begin(struct amd_sched_job *s_job)
-{
-	struct amd_gpu_scheduler *sched = s_job->sched;
-
-	dma_fence_add_callback(&s_job->s_fence->finished, &s_job->finish_cb,
-			       amd_sched_job_finish_cb);
-
-	spin_lock(&sched->job_list_lock);
-	list_add_tail(&s_job->node, &sched->ring_mirror_list);
-	if (sched->timeout != MAX_SCHEDULE_TIMEOUT &&
-	    list_first_entry_or_null(&sched->ring_mirror_list,
-				     struct amd_sched_job, node) == s_job)
-		schedule_delayed_work(&s_job->work_tdr, sched->timeout);
-	spin_unlock(&sched->job_list_lock);
-}
-
-static void amd_sched_job_timedout(struct work_struct *work)
-{
-	struct amd_sched_job *job = container_of(work, struct amd_sched_job,
-						 work_tdr.work);
-
-	job->sched->ops->timedout_job(job);
-}
-
-void amd_sched_hw_job_reset(struct amd_gpu_scheduler *sched, struct amd_sched_job *bad)
-{
-	struct amd_sched_job *s_job;
-	struct amd_sched_entity *entity, *tmp;
-	int i;;
-
-	spin_lock(&sched->job_list_lock);
-	list_for_each_entry_reverse(s_job, &sched->ring_mirror_list, node) {
-		if (s_job->s_fence->parent &&
-		    dma_fence_remove_callback(s_job->s_fence->parent,
-					      &s_job->s_fence->cb)) {
-			dma_fence_put(s_job->s_fence->parent);
-			s_job->s_fence->parent = NULL;
-			atomic_dec(&sched->hw_rq_count);
-		}
-	}
-	spin_unlock(&sched->job_list_lock);
-
-	if (bad && bad->s_priority != AMD_SCHED_PRIORITY_KERNEL) {
-		atomic_inc(&bad->karma);
-		/* don't increase @bad's karma if it's from KERNEL RQ,
-		 * becuase sometimes GPU hang would cause kernel jobs (like VM updating jobs)
-		 * corrupt but keep in mind that kernel jobs always considered good.
-		 */
-		for (i = AMD_SCHED_PRIORITY_MIN; i < AMD_SCHED_PRIORITY_KERNEL; i++ ) {
-			struct amd_sched_rq *rq = &sched->sched_rq[i];
-
-			spin_lock(&rq->lock);
-			list_for_each_entry_safe(entity, tmp, &rq->entities, list) {
-				if (bad->s_fence->scheduled.context == entity->fence_context) {
-				    if (atomic_read(&bad->karma) > bad->sched->hang_limit)
-						if (entity->guilty)
-							atomic_set(entity->guilty, 1);
-					break;
-				}
-			}
-			spin_unlock(&rq->lock);
-			if (&entity->list != &rq->entities)
-				break;
-		}
-	}
-}
-
-void amd_sched_job_kickout(struct amd_sched_job *s_job)
-{
-	struct amd_gpu_scheduler *sched = s_job->sched;
-
-	spin_lock(&sched->job_list_lock);
-	list_del_init(&s_job->node);
-	spin_unlock(&sched->job_list_lock);
-}
-
-void amd_sched_job_recovery(struct amd_gpu_scheduler *sched)
-{
-	struct amd_sched_job *s_job, *tmp;
-	bool found_guilty = false;
-	int r;
-
-	spin_lock(&sched->job_list_lock);
-	s_job = list_first_entry_or_null(&sched->ring_mirror_list,
-					 struct amd_sched_job, node);
-	if (s_job && sched->timeout != MAX_SCHEDULE_TIMEOUT)
-		schedule_delayed_work(&s_job->work_tdr, sched->timeout);
-
-	list_for_each_entry_safe(s_job, tmp, &sched->ring_mirror_list, node) {
-		struct amd_sched_fence *s_fence = s_job->s_fence;
-		struct dma_fence *fence;
-		uint64_t guilty_context;
-
-		if (!found_guilty && atomic_read(&s_job->karma) > sched->hang_limit) {
-			found_guilty = true;
-			guilty_context = s_job->s_fence->scheduled.context;
-		}
-
-		if (found_guilty && s_job->s_fence->scheduled.context == guilty_context)
-			dma_fence_set_error(&s_fence->finished, -ECANCELED);
-
-		spin_unlock(&sched->job_list_lock);
-		fence = sched->ops->run_job(s_job);
-		atomic_inc(&sched->hw_rq_count);
-		if (fence) {
-			s_fence->parent = dma_fence_get(fence);
-			r = dma_fence_add_callback(fence, &s_fence->cb,
-						   amd_sched_process_job);
-			if (r == -ENOENT)
-				amd_sched_process_job(fence, &s_fence->cb);
-			else if (r)
-				DRM_ERROR("fence add callback failed (%d)\n",
-					  r);
-			dma_fence_put(fence);
-		} else {
-			amd_sched_process_job(NULL, &s_fence->cb);
-		}
-		spin_lock(&sched->job_list_lock);
-	}
-	spin_unlock(&sched->job_list_lock);
-}
-
-/* init a sched_job with basic field */
-int amd_sched_job_init(struct amd_sched_job *job,
-		       struct amd_gpu_scheduler *sched,
-		       struct amd_sched_entity *entity,
-		       void *owner)
-{
-	job->sched = sched;
-	job->s_priority = entity->rq - sched->sched_rq;
-	job->s_fence = amd_sched_fence_create(entity, owner);
-	if (!job->s_fence)
-		return -ENOMEM;
-	job->id = atomic64_inc_return(&sched->job_id_count);
-
-	INIT_WORK(&job->finish_work, amd_sched_job_finish);
-	INIT_LIST_HEAD(&job->node);
-	INIT_DELAYED_WORK(&job->work_tdr, amd_sched_job_timedout);
-
-	return 0;
-}
-
-/**
- * Return ture if we can push more jobs to the hw.
- */
-static bool amd_sched_ready(struct amd_gpu_scheduler *sched)
-{
-	return atomic_read(&sched->hw_rq_count) <
-		sched->hw_submission_limit;
-}
-
-/**
- * Wake up the scheduler when it is ready
- */
-static void amd_sched_wakeup(struct amd_gpu_scheduler *sched)
-{
-	if (amd_sched_ready(sched))
-		wake_up_interruptible(&sched->wake_up_worker);
-}
-
-/**
- * Select next entity to process
-*/
-static struct amd_sched_entity *
-amd_sched_select_entity(struct amd_gpu_scheduler *sched)
-{
-	struct amd_sched_entity *entity;
-	int i;
-
-	if (!amd_sched_ready(sched))
-		return NULL;
-
-	/* Kernel run queue has higher priority than normal run queue*/
-	for (i = AMD_SCHED_PRIORITY_MAX - 1; i >= AMD_SCHED_PRIORITY_MIN; i--) {
-		entity = amd_sched_rq_select_entity(&sched->sched_rq[i]);
-		if (entity)
-			break;
-	}
-
-	return entity;
-}
-
-static void amd_sched_process_job(struct dma_fence *f, struct dma_fence_cb *cb)
-{
-	struct amd_sched_fence *s_fence =
-		container_of(cb, struct amd_sched_fence, cb);
-	struct amd_gpu_scheduler *sched = s_fence->sched;
-
-	dma_fence_get(&s_fence->finished);
-	atomic_dec(&sched->hw_rq_count);
-	amd_sched_fence_finished(s_fence);
-
-	trace_amd_sched_process_job(s_fence);
-	dma_fence_put(&s_fence->finished);
-	wake_up_interruptible(&sched->wake_up_worker);
-}
-
-static bool amd_sched_blocked(struct amd_gpu_scheduler *sched)
-{
-	if (kthread_should_park()) {
-		kthread_parkme();
-		return true;
-	}
-
-	return false;
-}
-
-static int amd_sched_main(void *param)
-{
-	struct sched_param sparam = {.sched_priority = 1};
-	struct amd_gpu_scheduler *sched = (struct amd_gpu_scheduler *)param;
-	int r;
-
-	sched_setscheduler(current, SCHED_FIFO, &sparam);
-
-	while (!kthread_should_stop()) {
-		struct amd_sched_entity *entity = NULL;
-		struct amd_sched_fence *s_fence;
-		struct amd_sched_job *sched_job;
-		struct dma_fence *fence;
-
-		wait_event_interruptible(sched->wake_up_worker,
-					 (!amd_sched_blocked(sched) &&
-					  (entity = amd_sched_select_entity(sched))) ||
-					 kthread_should_stop());
-
-		if (!entity)
-			continue;
-
-		sched_job = amd_sched_entity_pop_job(entity);
-		if (!sched_job)
-			continue;
-
-		s_fence = sched_job->s_fence;
-
-		atomic_inc(&sched->hw_rq_count);
-		amd_sched_job_begin(sched_job);
-
-		fence = sched->ops->run_job(sched_job);
-		amd_sched_fence_scheduled(s_fence);
-
-		if (fence) {
-			s_fence->parent = dma_fence_get(fence);
-			r = dma_fence_add_callback(fence, &s_fence->cb,
-						   amd_sched_process_job);
-			if (r == -ENOENT)
-				amd_sched_process_job(fence, &s_fence->cb);
-			else if (r)
-				DRM_ERROR("fence add callback failed (%d)\n",
-					  r);
-			dma_fence_put(fence);
-		} else {
-			amd_sched_process_job(NULL, &s_fence->cb);
-		}
-
-		wake_up(&sched->job_scheduled);
-	}
-	return 0;
-}
-
-/**
- * Init a gpu scheduler instance
- *
- * @sched		The pointer to the scheduler
- * @ops			The backend operations for this scheduler.
- * @hw_submissions	Number of hw submissions to do.
- * @name		Name used for debugging
- *
- * Return 0 on success, otherwise error code.
-*/
-int amd_sched_init(struct amd_gpu_scheduler *sched,
-		   const struct amd_sched_backend_ops *ops,
-		   unsigned hw_submission,
-		   unsigned hang_limit,
-		   long timeout,
-		   const char *name)
-{
-	int i;
-	sched->ops = ops;
-	sched->hw_submission_limit = hw_submission;
-	sched->name = name;
-	sched->timeout = timeout;
-	sched->hang_limit = hang_limit;
-	for (i = AMD_SCHED_PRIORITY_MIN; i < AMD_SCHED_PRIORITY_MAX; i++)
-		amd_sched_rq_init(&sched->sched_rq[i]);
-
-	init_waitqueue_head(&sched->wake_up_worker);
-	init_waitqueue_head(&sched->job_scheduled);
-	INIT_LIST_HEAD(&sched->ring_mirror_list);
-	spin_lock_init(&sched->job_list_lock);
-	atomic_set(&sched->hw_rq_count, 0);
-	atomic64_set(&sched->job_id_count, 0);
-
-	/* Each scheduler will run on a seperate kernel thread */
-	sched->thread = kthread_run(amd_sched_main, sched, sched->name);
-	if (IS_ERR(sched->thread)) {
-		DRM_ERROR("Failed to create scheduler for %s.\n", name);
-		return PTR_ERR(sched->thread);
-	}
-
-	return 0;
-}
-
-/**
- * Destroy a gpu scheduler
- *
- * @sched	The pointer to the scheduler
- */
-void amd_sched_fini(struct amd_gpu_scheduler *sched)
-{
-	if (sched->thread)
-		kthread_stop(sched->thread);
-}