From 8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Tue, 15 Dec 2015 14:52:16 -0300
Subject: Linux-libre 4.3.2-gnu
---
drivers/gpu/drm/amd/scheduler/gpu_sched_trace.h | 41 +++
drivers/gpu/drm/amd/scheduler/gpu_scheduler.c | 425 ++++++++++++++++++++++++
drivers/gpu/drm/amd/scheduler/gpu_scheduler.h | 133 ++++++++
drivers/gpu/drm/amd/scheduler/sched_fence.c | 81 +++++
4 files changed, 680 insertions(+)
create mode 100644 drivers/gpu/drm/amd/scheduler/gpu_sched_trace.h
create mode 100644 drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
create mode 100644 drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
create mode 100644 drivers/gpu/drm/amd/scheduler/sched_fence.c
(limited to 'drivers/gpu/drm/amd/scheduler')
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,
+};
--
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