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
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2017 Etnaviv Project
*/
#include <linux/moduleparam.h>
#include "etnaviv_drv.h"
#include "etnaviv_dump.h"
#include "etnaviv_gem.h"
#include "etnaviv_gpu.h"
#include "etnaviv_sched.h"
#include "state.xml.h"
static int etnaviv_job_hang_limit = 0;
module_param_named(job_hang_limit, etnaviv_job_hang_limit, int , 0444);
static int etnaviv_hw_jobs_limit = 4;
module_param_named(hw_job_limit, etnaviv_hw_jobs_limit, int , 0444);
static struct dma_fence *etnaviv_sched_run_job(struct drm_sched_job *sched_job)
{
struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
struct dma_fence *fence = NULL;
if (likely(!sched_job->s_fence->finished.error))
fence = etnaviv_gpu_submit(submit);
else
dev_dbg(submit->gpu->dev, "skipping bad job\n");
return fence;
}
static enum drm_gpu_sched_stat etnaviv_sched_timedout_job(struct drm_sched_job
*sched_job)
{
struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
struct etnaviv_gpu *gpu = submit->gpu;
u32 dma_addr;
int change;
/* block scheduler */
drm_sched_stop(&gpu->sched, sched_job);
/*
* If the GPU managed to complete this jobs fence, the timout is
* spurious. Bail out.
*/
if (dma_fence_is_signaled(submit->out_fence))
goto out_no_timeout;
/*
* If the GPU is still making forward progress on the front-end (which
* should never loop) we shift out the timeout to give it a chance to
* finish the job.
*/
dma_addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
change = dma_addr - gpu->hangcheck_dma_addr;
if (gpu->state == ETNA_GPU_STATE_RUNNING &&
(gpu->completed_fence != gpu->hangcheck_fence ||
change < 0 || change > 16)) {
gpu->hangcheck_dma_addr = dma_addr;
gpu->hangcheck_fence = gpu->completed_fence;
goto out_no_timeout;
}
if(sched_job)
drm_sched_increase_karma(sched_job);
/* get the GPU back into the init state */
etnaviv_core_dump(submit);
etnaviv_gpu_recover_hang(submit);
drm_sched_resubmit_jobs(&gpu->sched);
drm_sched_start(&gpu->sched, true);
return DRM_GPU_SCHED_STAT_NOMINAL;
out_no_timeout:
/* restart scheduler after GPU is usable again */
drm_sched_start(&gpu->sched, true);
return DRM_GPU_SCHED_STAT_NOMINAL;
}
static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)
{
struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
drm_sched_job_cleanup(sched_job);
etnaviv_submit_put(submit);
}
static const struct drm_sched_backend_ops etnaviv_sched_ops = {
.run_job = etnaviv_sched_run_job,
.timedout_job = etnaviv_sched_timedout_job,
.free_job = etnaviv_sched_free_job,
};
int etnaviv_sched_push_job(struct etnaviv_gem_submit *submit)
{
struct etnaviv_gpu *gpu = submit->gpu;
int ret;
/*
* Hold the sched lock across the whole operation to avoid jobs being
* pushed out of order with regard to their sched fence seqnos as
* allocated in drm_sched_job_arm.
*/
mutex_lock(&gpu->sched_lock);
drm_sched_job_arm(&submit->sched_job);
submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
ret = xa_alloc_cyclic(&gpu->user_fences, &submit->out_fence_id,
submit->out_fence, xa_limit_32b,
&gpu->next_user_fence, GFP_KERNEL);
if (ret < 0) {
drm_sched_job_cleanup(&submit->sched_job);
goto out_unlock;
}
/* the scheduler holds on to the job now */
kref_get(&submit->refcount);
drm_sched_entity_push_job(&submit->sched_job);
out_unlock:
mutex_unlock(&gpu->sched_lock);
return ret;
}
int etnaviv_sched_init(struct etnaviv_gpu *gpu)
{
int ret;
ret = drm_sched_init(&gpu->sched, &etnaviv_sched_ops, NULL,
DRM_SCHED_PRIORITY_COUNT,
etnaviv_hw_jobs_limit, etnaviv_job_hang_limit,
msecs_to_jiffies(500), NULL, NULL,
dev_name(gpu->dev), gpu->dev);
if (ret)
return ret;
return 0;
}
void etnaviv_sched_fini(struct etnaviv_gpu *gpu)
{
drm_sched_fini(&gpu->sched);
}
|
