Linux-libre 4.3.2-gnu

4 files changed, 680 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/scheduler/gpu_sched_trace.h b/drivers/gpu/drm/amd/scheduler/gpu_sched_trace.h
new file mode 100644
index 000000000..144f50acc
--- /dev/null
+++ b/drivers/gpu/drm/amd/scheduler/gpu_sched_trace.h
@@ -0,0 +1,41 @@
+#if !defined(_GPU_SCHED_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _GPU_SCHED_TRACE_H_
+
+#include <linux/stringify.h>
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+#include <drm/drmP.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM gpu_sched
+#define TRACE_INCLUDE_FILE gpu_sched_trace
+
+TRACE_EVENT(amd_sched_job,
+	    TP_PROTO(struct amd_sched_job *sched_job),
+	    TP_ARGS(sched_job),
+	    TP_STRUCT__entry(
+			     __field(struct amd_sched_entity *, entity)
+			     __field(const char *, name)
+			     __field(u32, job_count)
+			     __field(int, hw_job_count)
+			     ),
+
+	    TP_fast_assign(
+			   __entry->entity = sched_job->s_entity;
+			   __entry->name = sched_job->sched->name;
+			   __entry->job_count = kfifo_len(
+				   &sched_job->s_entity->job_queue) / sizeof(sched_job);
+			   __entry->hw_job_count = atomic_read(
+				   &sched_job->sched->hw_rq_count);
+			   ),
+	    TP_printk("entity=%p, ring=%s, job count:%u, hw job count:%d",
+		      __entry->entity, __entry->name, __entry->job_count,
+		      __entry->hw_job_count)
+);
+#endif
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#include <trace/define_trace.h>
diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
new file mode 100644
index 000000000..3697eeeec
--- /dev/null
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
@@ -0,0 +1,425 @@
+/*
+ * 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/drmP.h>
+#include "gpu_scheduler.h"
+
+#define CREATE_TRACE_POINTS
+#include "gpu_sched_trace.h"
+
+static struct amd_sched_job *
+amd_sched_entity_pop_job(struct amd_sched_entity *entity);
+static void amd_sched_wakeup(struct amd_gpu_scheduler *sched);
+
+/* 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)
+{
+	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)
+{
+	spin_lock(&rq->lock);
+	list_del_init(&entity->list);
+	if (rq->current_entity == entity)
+		rq->current_entity = NULL;
+	spin_unlock(&rq->lock);
+}
+
+/**
+ * Select next job from a specified run queue with round robin policy.
+ * Return NULL if nothing available.
+ */
+static struct amd_sched_job *
+amd_sched_rq_select_job(struct amd_sched_rq *rq)
+{
+	struct amd_sched_entity *entity;
+	struct amd_sched_job *sched_job;
+
+	spin_lock(&rq->lock);
+
+	entity = rq->current_entity;
+	if (entity) {
+		list_for_each_entry_continue(entity, &rq->entities, list) {
+			sched_job = amd_sched_entity_pop_job(entity);
+			if (sched_job) {
+				rq->current_entity = entity;
+				spin_unlock(&rq->lock);
+				return sched_job;
+			}
+		}
+	}
+
+	list_for_each_entry(entity, &rq->entities, list) {
+
+		sched_job = amd_sched_entity_pop_job(entity);
+		if (sched_job) {
+			rq->current_entity = entity;
+			spin_unlock(&rq->lock);
+			return sched_job;
+		}
+
+		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)
+{
+	int r;
+
+	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;
+
+	spin_lock_init(&entity->queue_lock);
+	r = kfifo_alloc(&entity->job_queue, jobs * sizeof(void *), GFP_KERNEL);
+	if (r)
+		return r;
+
+	atomic_set(&entity->fence_seq, 0);
+	entity->fence_context = fence_context_alloc(1);
+
+	/* Add the entity to the run queue */
+	amd_sched_rq_add_entity(rq, entity);
+
+	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 (kfifo_is_empty(&entity->job_queue))
+		return true;
+
+	return false;
+}
+
+/**
+ * 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)
+{
+	struct amd_sched_rq *rq = entity->rq;
+
+	if (!amd_sched_entity_is_initialized(sched, entity))
+		return;
+
+	/**
+	 * The client will not queue more IBs during this fini, consume existing
+	 * queued IBs
+	*/
+	wait_event(sched->job_scheduled, amd_sched_entity_is_idle(entity));
+
+	amd_sched_rq_remove_entity(rq, entity);
+	kfifo_free(&entity->job_queue);
+}
+
+static void amd_sched_entity_wakeup(struct fence *f, struct fence_cb *cb)
+{
+	struct amd_sched_entity *entity =
+		container_of(cb, struct amd_sched_entity, cb);
+	entity->dependency = NULL;
+	fence_put(f);
+	amd_sched_wakeup(entity->sched);
+}
+
+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;
+
+	if (ACCESS_ONCE(entity->dependency))
+		return NULL;
+
+	if (!kfifo_out_peek(&entity->job_queue, &sched_job, sizeof(sched_job)))
+		return NULL;
+
+	while ((entity->dependency = sched->ops->dependency(sched_job))) {
+
+		if (fence_add_callback(entity->dependency, &entity->cb,
+				       amd_sched_entity_wakeup))
+			fence_put(entity->dependency);
+		else
+			return NULL;
+	}
+
+	return sched_job;
+}
+
+/**
+ * Helper to submit a job to the job queue
+ *
+ * @sched_job		The pointer to job required to submit
+ *
+ * Returns true if we could submit the job.
+ */
+static bool amd_sched_entity_in(struct amd_sched_job *sched_job)
+{
+	struct amd_sched_entity *entity = sched_job->s_entity;
+	bool added, first = false;
+
+	spin_lock(&entity->queue_lock);
+	added = kfifo_in(&entity->job_queue, &sched_job,
+			sizeof(sched_job)) == sizeof(sched_job);
+
+	if (added && kfifo_len(&entity->job_queue) == sizeof(sched_job))
+		first = true;
+
+	spin_unlock(&entity->queue_lock);
+
+	/* first job wakes up scheduler */
+	if (first)
+		amd_sched_wakeup(sched_job->sched);
+
+	return added;
+}
+
+/**
+ * Submit a job to the job queue
+ *
+ * @sched_job		The pointer to job required to submit
+ *
+ * Returns 0 for success, negative error code otherwise.
+ */
+int amd_sched_entity_push_job(struct amd_sched_job *sched_job)
+{
+	struct amd_sched_entity *entity = sched_job->s_entity;
+	struct amd_sched_fence *fence = amd_sched_fence_create(
+		entity, sched_job->owner);
+
+	if (!fence)
+		return -ENOMEM;
+
+	fence_get(&fence->base);
+	sched_job->s_fence = fence;
+
+	wait_event(entity->sched->job_scheduled,
+		   amd_sched_entity_in(sched_job));
+	trace_amd_sched_job(sched_job);
+	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 to run
+*/
+static struct amd_sched_job *
+amd_sched_select_job(struct amd_gpu_scheduler *sched)
+{
+	struct amd_sched_job *sched_job;
+
+	if (!amd_sched_ready(sched))
+		return NULL;
+
+	/* Kernel run queue has higher priority than normal run queue*/
+	sched_job = amd_sched_rq_select_job(&sched->kernel_rq);
+	if (sched_job == NULL)
+		sched_job = amd_sched_rq_select_job(&sched->sched_rq);
+
+	return sched_job;
+}
+
+static void amd_sched_process_job(struct fence *f, struct 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;
+
+	atomic_dec(&sched->hw_rq_count);
+	amd_sched_fence_signal(s_fence);
+	fence_put(&s_fence->base);
+	wake_up_interruptible(&sched->wake_up_worker);
+}
+
+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, count;
+
+	sched_setscheduler(current, SCHED_FIFO, &sparam);
+
+	while (!kthread_should_stop()) {
+		struct amd_sched_entity *entity;
+		struct amd_sched_fence *s_fence;
+		struct amd_sched_job *sched_job;
+		struct fence *fence;
+
+		wait_event_interruptible(sched->wake_up_worker,
+			kthread_should_stop() ||
+			(sched_job = amd_sched_select_job(sched)));
+
+		if (!sched_job)
+			continue;
+
+		entity = sched_job->s_entity;
+		s_fence = sched_job->s_fence;
+		atomic_inc(&sched->hw_rq_count);
+		fence = sched->ops->run_job(sched_job);
+		if (fence) {
+			r = 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);
+			fence_put(fence);
+		} else {
+			DRM_ERROR("Failed to run job!\n");
+			amd_sched_process_job(NULL, &s_fence->cb);
+		}
+
+		count = kfifo_out(&entity->job_queue, &sched_job,
+				sizeof(sched_job));
+		WARN_ON(count != sizeof(sched_job));
+		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,
+		   struct amd_sched_backend_ops *ops,
+		   unsigned hw_submission, const char *name)
+{
+	sched->ops = ops;
+	sched->hw_submission_limit = hw_submission;
+	sched->name = name;
+	amd_sched_rq_init(&sched->sched_rq);
+	amd_sched_rq_init(&sched->kernel_rq);
+
+	init_waitqueue_head(&sched->wake_up_worker);
+	init_waitqueue_head(&sched->job_scheduled);
+	atomic_set(&sched->hw_rq_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)
+{
+	kthread_stop(sched->thread);
+}
diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
new file mode 100644
index 000000000..80b64dc22
--- /dev/null
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
@@ -0,0 +1,133 @@
+/*
+ * 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.
+ *
+ */
+
+#ifndef _GPU_SCHEDULER_H_
+#define _GPU_SCHEDULER_H_
+
+#include <linux/kfifo.h>
+#include <linux/fence.h>
+
+struct amd_gpu_scheduler;
+struct amd_sched_rq;
+
+/**
+ * A scheduler entity is a wrapper around a job queue or a group
+ * of other entities. Entities take turns emitting jobs from their 
+ * job queues to corresponding hardware ring based on scheduling
+ * policy.
+*/
+struct amd_sched_entity {
+	struct list_head		list;
+	struct amd_sched_rq		*rq;
+	struct amd_gpu_scheduler	*sched;
+
+	spinlock_t			queue_lock;
+	struct kfifo                    job_queue;
+
+	atomic_t			fence_seq;
+	uint64_t                        fence_context;
+
+	struct fence			*dependency;
+	struct fence_cb			cb;
+};
+
+/**
+ * Run queue is a set of entities scheduling command submissions for
+ * one specific ring. It implements the scheduling policy that selects
+ * the next entity to emit commands from.
+*/
+struct amd_sched_rq {
+	spinlock_t		lock;
+	struct list_head	entities;
+	struct amd_sched_entity	*current_entity;
+};
+
+struct amd_sched_fence {
+	struct fence                    base;
+	struct fence_cb                 cb;
+	struct amd_gpu_scheduler	*sched;
+	spinlock_t			lock;
+	void                            *owner;
+};
+
+struct amd_sched_job {
+	struct amd_gpu_scheduler        *sched;
+	struct amd_sched_entity         *s_entity;
+	struct amd_sched_fence          *s_fence;
+	void		                *owner;
+};
+
+extern const struct fence_ops amd_sched_fence_ops;
+static inline struct amd_sched_fence *to_amd_sched_fence(struct fence *f)
+{
+	struct amd_sched_fence *__f = container_of(f, struct amd_sched_fence, base);
+
+	if (__f->base.ops == &amd_sched_fence_ops)
+		return __f;
+
+	return NULL;
+}
+
+/**
+ * Define the backend operations called by the scheduler,
+ * these functions should be implemented in driver side
+*/
+struct amd_sched_backend_ops {
+	struct fence *(*dependency)(struct amd_sched_job *sched_job);
+	struct fence *(*run_job)(struct amd_sched_job *sched_job);
+};
+
+/**
+ * One scheduler is implemented for each hardware ring
+*/
+struct amd_gpu_scheduler {
+	struct amd_sched_backend_ops	*ops;
+	uint32_t			hw_submission_limit;
+	const char			*name;
+	struct amd_sched_rq		sched_rq;
+	struct amd_sched_rq		kernel_rq;
+	wait_queue_head_t		wake_up_worker;
+	wait_queue_head_t		job_scheduled;
+	atomic_t			hw_rq_count;
+	struct task_struct		*thread;
+};
+
+int amd_sched_init(struct amd_gpu_scheduler *sched,
+		   struct amd_sched_backend_ops *ops,
+		   uint32_t hw_submission, const char *name);
+void amd_sched_fini(struct amd_gpu_scheduler *sched);
+
+int amd_sched_entity_init(struct amd_gpu_scheduler *sched,
+			  struct amd_sched_entity *entity,
+			  struct amd_sched_rq *rq,
+			  uint32_t jobs);
+void amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
+			   struct amd_sched_entity *entity);
+int amd_sched_entity_push_job(struct amd_sched_job *sched_job);
+
+struct amd_sched_fence *amd_sched_fence_create(
+	struct amd_sched_entity *s_entity, void *owner);
+void amd_sched_fence_signal(struct amd_sched_fence *fence);
+
+
+#endif
diff --git a/drivers/gpu/drm/amd/scheduler/sched_fence.c b/drivers/gpu/drm/amd/scheduler/sched_fence.c
new file mode 100644
index 000000000..d80263809
--- /dev/null
+++ b/drivers/gpu/drm/amd/scheduler/sched_fence.c
@@ -0,0 +1,81 @@
+/*
+ * 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/drmP.h>
+#include "gpu_scheduler.h"
+
+struct amd_sched_fence *amd_sched_fence_create(struct amd_sched_entity *s_entity, void *owner)
+{
+	struct amd_sched_fence *fence = NULL;
+	unsigned seq;
+
+	fence = kzalloc(sizeof(struct amd_sched_fence), GFP_KERNEL);
+	if (fence == NULL)
+		return NULL;
+	fence->owner = owner;
+	fence->sched = s_entity->sched;
+	spin_lock_init(&fence->lock);
+
+	seq = atomic_inc_return(&s_entity->fence_seq);
+	fence_init(&fence->base, &amd_sched_fence_ops, &fence->lock,
+		   s_entity->fence_context, seq);
+
+	return fence;
+}
+
+void amd_sched_fence_signal(struct amd_sched_fence *fence)
+{
+	int ret = fence_signal(&fence->base);
+	if (!ret)
+		FENCE_TRACE(&fence->base, "signaled from irq context\n");
+	else
+		FENCE_TRACE(&fence->base, "was already signaled\n");
+}
+
+static const char *amd_sched_fence_get_driver_name(struct fence *fence)
+{
+	return "amd_sched";
+}
+
+static const char *amd_sched_fence_get_timeline_name(struct fence *f)
+{
+	struct amd_sched_fence *fence = to_amd_sched_fence(f);
+	return (const char *)fence->sched->name;
+}
+
+static bool amd_sched_fence_enable_signaling(struct fence *f)
+{
+	return true;
+}
+
+const struct fence_ops amd_sched_fence_ops = {
+	.get_driver_name = amd_sched_fence_get_driver_name,
+	.get_timeline_name = amd_sched_fence_get_timeline_name,
+	.enable_signaling = amd_sched_fence_enable_signaling,
+	.signaled = NULL,
+	.wait = fence_default_wait,
+	.release = NULL,
+};