tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2023 Intel Corporation
4 */
5
6#include "xe_gpu_scheduler.h"
7
8static void xe_sched_process_msg_queue(struct xe_gpu_scheduler *sched)
9{
10 if (!READ_ONCE(sched->base.pause_submit))
11 queue_work(sched->base.submit_wq, &sched->work_process_msg);
12}
13
14static void xe_sched_process_msg_queue_if_ready(struct xe_gpu_scheduler *sched)
15{
16 struct xe_sched_msg *msg;
17
18 xe_sched_msg_lock(sched);
19 msg = list_first_entry_or_null(&sched->msgs, struct xe_sched_msg, link);
20 if (msg)
21 xe_sched_process_msg_queue(sched);
22 xe_sched_msg_unlock(sched);
23}
24
25static struct xe_sched_msg *
26xe_sched_get_msg(struct xe_gpu_scheduler *sched)
27{
28 struct xe_sched_msg *msg;
29
30 xe_sched_msg_lock(sched);
31 msg = list_first_entry_or_null(&sched->msgs,
32 struct xe_sched_msg, link);
33 if (msg)
34 list_del_init(&msg->link);
35 xe_sched_msg_unlock(sched);
36
37 return msg;
38}
39
40static void xe_sched_process_msg_work(struct work_struct *w)
41{
42 struct xe_gpu_scheduler *sched =
43 container_of(w, struct xe_gpu_scheduler, work_process_msg);
44 struct xe_sched_msg *msg;
45
46 if (READ_ONCE(sched->base.pause_submit))
47 return;
48
49 msg = xe_sched_get_msg(sched);
50 if (msg) {
51 sched->ops->process_msg(msg);
52
53 xe_sched_process_msg_queue_if_ready(sched);
54 }
55}
56
57int xe_sched_init(struct xe_gpu_scheduler *sched,
58 const struct drm_sched_backend_ops *ops,
59 const struct xe_sched_backend_ops *xe_ops,
60 struct workqueue_struct *submit_wq,
61 uint32_t hw_submission, unsigned hang_limit,
62 long timeout, struct workqueue_struct *timeout_wq,
63 atomic_t *score, const char *name,
64 struct device *dev)
65{
66 sched->ops = xe_ops;
67 INIT_LIST_HEAD(&sched->msgs);
68 INIT_WORK(&sched->work_process_msg, xe_sched_process_msg_work);
69
70 return drm_sched_init(&sched->base, ops, submit_wq, 1, hw_submission,
71 hang_limit, timeout, timeout_wq, score, name,
72 dev);
73}
74
75void xe_sched_fini(struct xe_gpu_scheduler *sched)
76{
77 xe_sched_submission_stop(sched);
78 drm_sched_fini(&sched->base);
79}
80
81void xe_sched_submission_start(struct xe_gpu_scheduler *sched)
82{
83 drm_sched_wqueue_start(&sched->base);
84 queue_work(sched->base.submit_wq, &sched->work_process_msg);
85}
86
87void xe_sched_submission_stop(struct xe_gpu_scheduler *sched)
88{
89 drm_sched_wqueue_stop(&sched->base);
90 cancel_work_sync(&sched->work_process_msg);
91}
92
93void xe_sched_submission_resume_tdr(struct xe_gpu_scheduler *sched)
94{
95 drm_sched_resume_timeout(&sched->base, sched->base.timeout);
96}
97
98void xe_sched_add_msg(struct xe_gpu_scheduler *sched,
99 struct xe_sched_msg *msg)
100{
101 xe_sched_msg_lock(sched);
102 xe_sched_add_msg_locked(sched, msg);
103 xe_sched_msg_unlock(sched);
104}
105
106void xe_sched_add_msg_locked(struct xe_gpu_scheduler *sched,
107 struct xe_sched_msg *msg)
108{
109 lockdep_assert_held(&sched->base.job_list_lock);
110
111 list_add_tail(&msg->link, &sched->msgs);
112 xe_sched_process_msg_queue(sched);
113}