2 * Copyright 2015 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
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
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
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
;
34 * A scheduler entity is a wrapper around a job queue or a group
35 * of other entities. Entities take turns emitting jobs from their
36 * job queues to corresponding hardware ring based on scheduling
39 struct amd_sched_entity
{
40 struct list_head list
;
41 struct amd_sched_rq
*rq
;
42 struct amd_gpu_scheduler
*sched
;
44 spinlock_t queue_lock
;
45 struct kfifo job_queue
;
48 uint64_t fence_context
;
50 struct fence
*dependency
;
55 * Run queue is a set of entities scheduling command submissions for
56 * one specific ring. It implements the scheduling policy that selects
57 * the next entity to emit commands from.
61 struct list_head entities
;
62 struct amd_sched_entity
*current_entity
;
65 struct amd_sched_fence
{
68 struct amd_gpu_scheduler
*sched
;
71 struct delayed_work dwork
;
72 struct list_head list
;
75 struct amd_sched_job
{
76 struct amd_gpu_scheduler
*sched
;
77 struct amd_sched_entity
*s_entity
;
78 struct amd_sched_fence
*s_fence
;
82 extern const struct fence_ops amd_sched_fence_ops
;
83 static inline struct amd_sched_fence
*to_amd_sched_fence(struct fence
*f
)
85 struct amd_sched_fence
*__f
= container_of(f
, struct amd_sched_fence
, base
);
87 if (__f
->base
.ops
== &amd_sched_fence_ops
)
94 * Define the backend operations called by the scheduler,
95 * these functions should be implemented in driver side
97 struct amd_sched_backend_ops
{
98 struct fence
*(*dependency
)(struct amd_sched_job
*sched_job
);
99 struct fence
*(*run_job
)(struct amd_sched_job
*sched_job
);
103 * One scheduler is implemented for each hardware ring
105 struct amd_gpu_scheduler
{
106 struct amd_sched_backend_ops
*ops
;
107 uint32_t hw_submission_limit
;
110 struct amd_sched_rq sched_rq
;
111 struct amd_sched_rq kernel_rq
;
112 wait_queue_head_t wake_up_worker
;
113 wait_queue_head_t job_scheduled
;
114 atomic_t hw_rq_count
;
115 struct list_head fence_list
;
116 spinlock_t fence_list_lock
;
117 struct task_struct
*thread
;
120 int amd_sched_init(struct amd_gpu_scheduler
*sched
,
121 struct amd_sched_backend_ops
*ops
,
122 uint32_t hw_submission
, long timeout
, const char *name
);
123 void amd_sched_fini(struct amd_gpu_scheduler
*sched
);
125 int amd_sched_entity_init(struct amd_gpu_scheduler
*sched
,
126 struct amd_sched_entity
*entity
,
127 struct amd_sched_rq
*rq
,
129 void amd_sched_entity_fini(struct amd_gpu_scheduler
*sched
,
130 struct amd_sched_entity
*entity
);
131 int amd_sched_entity_push_job(struct amd_sched_job
*sched_job
);
133 struct amd_sched_fence
*amd_sched_fence_create(
134 struct amd_sched_entity
*s_entity
, void *owner
);
135 void amd_sched_fence_signal(struct amd_sched_fence
*fence
);