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
;
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
);