1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/*
* 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>
#define AMD_GPU_WAIT_IDLE_TIMEOUT_IN_MS 3000
struct amd_gpu_scheduler;
struct amd_run_queue;
/**
* 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_run_queue *belongto_rq;
};
/**
* 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_run_queue {
struct mutex lock;
atomic_t nr_entity;
struct amd_sched_entity head;
struct amd_sched_entity *current_entity;
/**
* Return 0 means this entity can be scheduled
* Return -1 means this entity cannot be scheduled for reasons,
* i.e, it is the head, or these is no job, etc
*/
int (*check_entity_status)(struct amd_sched_entity *entity);
};
/**
* Context based scheduler entity, there can be multiple entities for
* each context, and one entity per ring
*/
struct amd_context_entity {
struct amd_sched_entity generic_entity;
spinlock_t lock;
/* the virtual_seq is unique per context per ring */
atomic64_t last_queued_v_seq;
atomic64_t last_emitted_v_seq;
/* the job_queue maintains the jobs submitted by clients */
struct kfifo job_queue;
spinlock_t queue_lock;
struct amd_gpu_scheduler *scheduler;
wait_queue_head_t wait_queue;
wait_queue_head_t wait_emit;
bool is_pending;
};
struct amd_sched_job {
struct list_head list;
struct fence_cb cb;
struct amd_gpu_scheduler *sched;
void *job;
};
/**
* Define the backend operations called by the scheduler,
* these functions should be implemented in driver side
*/
struct amd_sched_backend_ops {
int (*prepare_job)(struct amd_gpu_scheduler *sched,
struct amd_context_entity *c_entity,
void *job);
void (*run_job)(struct amd_gpu_scheduler *sched,
struct amd_context_entity *c_entity,
struct amd_sched_job *job);
void (*process_job)(struct amd_gpu_scheduler *sched, void *job);
};
/**
* One scheduler is implemented for each hardware ring
*/
struct amd_gpu_scheduler {
void *device;
struct task_struct *thread;
struct amd_run_queue sched_rq;
struct amd_run_queue kernel_rq;
struct list_head active_hw_rq;
atomic64_t hw_rq_count;
struct amd_sched_backend_ops *ops;
uint32_t ring_id;
uint32_t granularity; /* in ms unit */
uint32_t preemption;
wait_queue_head_t wait_queue;
struct amd_context_entity *current_entity;
struct mutex sched_lock;
spinlock_t queue_lock;
uint32_t hw_submission_limit;
};
struct amd_gpu_scheduler *amd_sched_create(void *device,
struct amd_sched_backend_ops *ops,
uint32_t ring,
uint32_t granularity,
uint32_t preemption,
uint32_t hw_submission);
int amd_sched_destroy(struct amd_gpu_scheduler *sched);
int amd_sched_push_job(struct amd_gpu_scheduler *sched,
struct amd_context_entity *c_entity,
void *job);
int amd_sched_wait_emit(struct amd_context_entity *c_entity,
uint64_t seq,
bool intr,
long timeout);
void amd_sched_process_job(struct amd_sched_job *sched_job);
uint64_t amd_sched_get_handled_seq(struct amd_gpu_scheduler *sched);
int amd_context_entity_fini(struct amd_gpu_scheduler *sched,
struct amd_context_entity *entity);
int amd_context_entity_init(struct amd_gpu_scheduler *sched,
struct amd_context_entity *entity,
struct amd_run_queue *rq,
uint32_t jobs);
void amd_sched_emit(struct amd_context_entity *c_entity, uint64_t seq);
uint64_t amd_sched_next_queued_seq(struct amd_context_entity *c_entity);
#endif
|
