]> Git Repo - linux.git/blob - drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c
drm/amdgpu: add backend implementation of gpu scheduler (v2)
[linux.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_sched.c
1 /*
2  * Copyright 2015 Advanced Micro Devices, Inc.
3  *
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:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
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.
21  *
22  *
23  */
24 #include <linux/kthread.h>
25 #include <linux/wait.h>
26 #include <linux/sched.h>
27 #include <drm/drmP.h>
28 #include "amdgpu.h"
29
30 static int amdgpu_sched_prepare_job(struct amd_gpu_scheduler *sched,
31                                     struct amd_context_entity *c_entity,
32                                     void *job)
33 {
34         int r = 0;
35         struct amdgpu_cs_parser *sched_job = (struct amdgpu_cs_parser *)job;
36         if (sched_job->prepare_job)
37                 r = sched_job->prepare_job(sched_job);
38         if (r) {
39                 DRM_ERROR("Prepare job error\n");
40                 schedule_work(&sched_job->job_work);
41         }
42         return r;
43 }
44
45 static void amdgpu_sched_run_job(struct amd_gpu_scheduler *sched,
46                                  struct amd_context_entity *c_entity,
47                                  void *job)
48 {
49         int r = 0;
50         struct amdgpu_cs_parser *sched_job = (struct amdgpu_cs_parser *)job;
51
52         mutex_lock(&sched_job->job_lock);
53         r = amdgpu_ib_schedule(sched_job->adev,
54                                sched_job->num_ibs,
55                                sched_job->ibs,
56                                sched_job->filp);
57         if (r)
58                 goto err;
59
60         if (sched_job->run_job) {
61                 r = sched_job->run_job(sched_job);
62                 if (r)
63                         goto err;
64         }
65         mutex_unlock(&sched_job->job_lock);
66         return;
67 err:
68         DRM_ERROR("Run job error\n");
69         mutex_unlock(&sched_job->job_lock);
70         schedule_work(&sched_job->job_work);
71 }
72
73 static void amdgpu_sched_process_job(struct amd_gpu_scheduler *sched, void *job)
74 {
75         struct amdgpu_cs_parser *sched_job = NULL;
76         struct amdgpu_fence *fence = NULL;
77         struct amdgpu_ring *ring = NULL;
78         struct amdgpu_device *adev = NULL;
79         struct amd_context_entity *c_entity = NULL;
80
81         if (!job)
82                 return;
83         sched_job = (struct amdgpu_cs_parser *)job;
84         fence = sched_job->ibs[sched_job->num_ibs - 1].fence;
85         if (!fence)
86                 return;
87         ring = fence->ring;
88         adev = ring->adev;
89
90         if (sched_job->ctx) {
91                 c_entity = &sched_job->ctx->rings[ring->idx].c_entity;
92                 atomic64_set(&c_entity->last_signaled_v_seq,
93                              sched_job->uf.sequence);
94         }
95
96         /* wake up users waiting for time stamp */
97         wake_up_all(&c_entity->wait_queue);
98
99         schedule_work(&sched_job->job_work);
100 }
101
102 struct amd_sched_backend_ops amdgpu_sched_ops = {
103         .prepare_job = amdgpu_sched_prepare_job,
104         .run_job = amdgpu_sched_run_job,
105         .process_job = amdgpu_sched_process_job
106 };
107
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