2 * Copyright 2015 Advanced Micro Devices, Inc.
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5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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24 #ifndef _GPU_SCHEDULER_H_
25 #define _GPU_SCHEDULER_H_
27 #include <linux/kfifo.h>
28 #include <linux/fence.h>
30 struct amd_gpu_scheduler;
33 extern struct kmem_cache *sched_fence_slab;
34 extern atomic_t sched_fence_slab_ref;
37 * A scheduler entity is a wrapper around a job queue or a group
38 * of other entities. Entities take turns emitting jobs from their
39 * job queues to corresponding hardware ring based on scheduling
42 struct amd_sched_entity {
43 struct list_head list;
44 struct amd_sched_rq *rq;
45 struct amd_gpu_scheduler *sched;
47 spinlock_t queue_lock;
48 struct kfifo job_queue;
51 uint64_t fence_context;
53 struct fence *dependency;
58 * Run queue is a set of entities scheduling command submissions for
59 * one specific ring. It implements the scheduling policy that selects
60 * the next entity to emit commands from.
64 struct list_head entities;
65 struct amd_sched_entity *current_entity;
68 struct amd_sched_fence {
71 struct amd_gpu_scheduler *sched;
74 struct delayed_work dwork;
75 struct list_head list;
78 struct amd_sched_job {
79 struct amd_gpu_scheduler *sched;
80 struct amd_sched_entity *s_entity;
81 struct amd_sched_fence *s_fence;
84 extern const struct fence_ops amd_sched_fence_ops;
85 static inline struct amd_sched_fence *to_amd_sched_fence(struct fence *f)
87 struct amd_sched_fence *__f = container_of(f, struct amd_sched_fence, base);
89 if (__f->base.ops == &amd_sched_fence_ops)
96 * Define the backend operations called by the scheduler,
97 * these functions should be implemented in driver side
99 struct amd_sched_backend_ops {
100 struct fence *(*dependency)(struct amd_sched_job *sched_job);
101 struct fence *(*run_job)(struct amd_sched_job *sched_job);
105 * One scheduler is implemented for each hardware ring
107 struct amd_gpu_scheduler {
108 struct amd_sched_backend_ops *ops;
109 uint32_t hw_submission_limit;
112 struct amd_sched_rq sched_rq;
113 struct amd_sched_rq kernel_rq;
114 wait_queue_head_t wake_up_worker;
115 wait_queue_head_t job_scheduled;
116 atomic_t hw_rq_count;
117 struct list_head fence_list;
118 spinlock_t fence_list_lock;
119 struct task_struct *thread;
122 int amd_sched_init(struct amd_gpu_scheduler *sched,
123 struct amd_sched_backend_ops *ops,
124 uint32_t hw_submission, long timeout, const char *name);
125 void amd_sched_fini(struct amd_gpu_scheduler *sched);
127 int amd_sched_entity_init(struct amd_gpu_scheduler *sched,
128 struct amd_sched_entity *entity,
129 struct amd_sched_rq *rq,
131 void amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
132 struct amd_sched_entity *entity);
133 void amd_sched_entity_push_job(struct amd_sched_job *sched_job);
135 struct amd_sched_fence *amd_sched_fence_create(
136 struct amd_sched_entity *s_entity, void *owner);
137 void amd_sched_fence_signal(struct amd_sched_fence *fence);