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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2017 Etnaviv Project
4 */
5
6#include <linux/moduleparam.h>
7
8#include "etnaviv_drv.h"
9#include "etnaviv_dump.h"
10#include "etnaviv_gem.h"
11#include "etnaviv_gpu.h"
12#include "etnaviv_sched.h"
13#include "state.xml.h"
14
15static int etnaviv_job_hang_limit = 0;
16module_param_named(job_hang_limit, etnaviv_job_hang_limit, int , 0444);
17static int etnaviv_hw_jobs_limit = 4;
18module_param_named(hw_job_limit, etnaviv_hw_jobs_limit, int , 0444);
19
20static struct dma_fence *
21etnaviv_sched_dependency(struct drm_sched_job *sched_job,
22 struct drm_sched_entity *entity)
23{
24 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
25 struct dma_fence *fence;
26 int i;
27
28 if (unlikely(submit->in_fence)) {
29 fence = submit->in_fence;
30 submit->in_fence = NULL;
31
32 if (!dma_fence_is_signaled(fence))
33 return fence;
34
35 dma_fence_put(fence);
36 }
37
38 for (i = 0; i < submit->nr_bos; i++) {
39 struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
40 int j;
41
42 if (bo->excl) {
43 fence = bo->excl;
44 bo->excl = NULL;
45
46 if (!dma_fence_is_signaled(fence))
47 return fence;
48
49 dma_fence_put(fence);
50 }
51
52 for (j = 0; j < bo->nr_shared; j++) {
53 if (!bo->shared[j])
54 continue;
55
56 fence = bo->shared[j];
57 bo->shared[j] = NULL;
58
59 if (!dma_fence_is_signaled(fence))
60 return fence;
61
62 dma_fence_put(fence);
63 }
64 kfree(bo->shared);
65 bo->nr_shared = 0;
66 bo->shared = NULL;
67 }
68
69 return NULL;
70}
71
72static struct dma_fence *etnaviv_sched_run_job(struct drm_sched_job *sched_job)
73{
74 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
75 struct dma_fence *fence = NULL;
76
77 if (likely(!sched_job->s_fence->finished.error))
78 fence = etnaviv_gpu_submit(submit);
79 else
80 dev_dbg(submit->gpu->dev, "skipping bad job\n");
81
82 return fence;
83}
84
85static void etnaviv_sched_timedout_job(struct drm_sched_job *sched_job)
86{
87 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
88 struct etnaviv_gpu *gpu = submit->gpu;
89 u32 dma_addr;
90 int change;
91
92 /*
93 * If the GPU managed to complete this jobs fence, the timout is
94 * spurious. Bail out.
95 */
96 if (dma_fence_is_signaled(submit->out_fence))
97 return;
98
99 /*
100 * If the GPU is still making forward progress on the front-end (which
101 * should never loop) we shift out the timeout to give it a chance to
102 * finish the job.
103 */
104 dma_addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
105 change = dma_addr - gpu->hangcheck_dma_addr;
106 if (change < 0 || change > 16) {
107 gpu->hangcheck_dma_addr = dma_addr;
108 return;
109 }
110
111 /* block scheduler */
112 drm_sched_stop(&gpu->sched, sched_job);
113
114 if(sched_job)
115 drm_sched_increase_karma(sched_job);
116
117 /* get the GPU back into the init state */
118 etnaviv_core_dump(submit);
119 etnaviv_gpu_recover_hang(gpu);
120
121 drm_sched_resubmit_jobs(&gpu->sched);
122
123 /* restart scheduler after GPU is usable again */
124 drm_sched_start(&gpu->sched, true);
125}
126
127static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)
128{
129 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
130
131 drm_sched_job_cleanup(sched_job);
132
133 etnaviv_submit_put(submit);
134}
135
136static const struct drm_sched_backend_ops etnaviv_sched_ops = {
137 .dependency = etnaviv_sched_dependency,
138 .run_job = etnaviv_sched_run_job,
139 .timedout_job = etnaviv_sched_timedout_job,
140 .free_job = etnaviv_sched_free_job,
141};
142
143int etnaviv_sched_push_job(struct drm_sched_entity *sched_entity,
144 struct etnaviv_gem_submit *submit)
145{
146 int ret = 0;
147
148 /*
149 * Hold the fence lock across the whole operation to avoid jobs being
150 * pushed out of order with regard to their sched fence seqnos as
151 * allocated in drm_sched_job_init.
152 */
153 mutex_lock(&submit->gpu->fence_lock);
154
155 ret = drm_sched_job_init(&submit->sched_job, sched_entity,
156 submit->ctx);
157 if (ret)
158 goto out_unlock;
159
160 submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
161 submit->out_fence_id = idr_alloc_cyclic(&submit->gpu->fence_idr,
162 submit->out_fence, 0,
163 INT_MAX, GFP_KERNEL);
164 if (submit->out_fence_id < 0) {
165 drm_sched_job_cleanup(&submit->sched_job);
166 ret = -ENOMEM;
167 goto out_unlock;
168 }
169
170 /* the scheduler holds on to the job now */
171 kref_get(&submit->refcount);
172
173 drm_sched_entity_push_job(&submit->sched_job, sched_entity);
174
175out_unlock:
176 mutex_unlock(&submit->gpu->fence_lock);
177
178 return ret;
179}
180
181int etnaviv_sched_init(struct etnaviv_gpu *gpu)
182{
183 int ret;
184
185 ret = drm_sched_init(&gpu->sched, &etnaviv_sched_ops,
186 etnaviv_hw_jobs_limit, etnaviv_job_hang_limit,
187 msecs_to_jiffies(500), dev_name(gpu->dev));
188 if (ret)
189 return ret;
190
191 return 0;
192}
193
194void etnaviv_sched_fini(struct etnaviv_gpu *gpu)
195{
196 drm_sched_fini(&gpu->sched);
197}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2017 Etnaviv Project
4 */
5
6#include <linux/moduleparam.h>
7
8#include "etnaviv_drv.h"
9#include "etnaviv_dump.h"
10#include "etnaviv_gem.h"
11#include "etnaviv_gpu.h"
12#include "etnaviv_sched.h"
13#include "state.xml.h"
14#include "state_hi.xml.h"
15
16static int etnaviv_job_hang_limit = 0;
17module_param_named(job_hang_limit, etnaviv_job_hang_limit, int , 0444);
18static int etnaviv_hw_jobs_limit = 4;
19module_param_named(hw_job_limit, etnaviv_hw_jobs_limit, int , 0444);
20
21static struct dma_fence *etnaviv_sched_run_job(struct drm_sched_job *sched_job)
22{
23 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
24 struct dma_fence *fence = NULL;
25
26 if (likely(!sched_job->s_fence->finished.error))
27 fence = etnaviv_gpu_submit(submit);
28 else
29 dev_dbg(submit->gpu->dev, "skipping bad job\n");
30
31 return fence;
32}
33
34static enum drm_gpu_sched_stat etnaviv_sched_timedout_job(struct drm_sched_job
35 *sched_job)
36{
37 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
38 struct etnaviv_gpu *gpu = submit->gpu;
39 u32 dma_addr, primid = 0;
40 int change;
41
42 /*
43 * If the GPU managed to complete this jobs fence, the timout is
44 * spurious. Bail out.
45 */
46 if (dma_fence_is_signaled(submit->out_fence))
47 goto out_no_timeout;
48
49 /*
50 * If the GPU is still making forward progress on the front-end (which
51 * should never loop) we shift out the timeout to give it a chance to
52 * finish the job.
53 */
54 dma_addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
55 change = dma_addr - gpu->hangcheck_dma_addr;
56 if (submit->exec_state == ETNA_PIPE_3D) {
57 /* guard against concurrent usage from perfmon_sample */
58 mutex_lock(&gpu->lock);
59 gpu_write(gpu, VIVS_MC_PROFILE_CONFIG0,
60 VIVS_MC_PROFILE_CONFIG0_FE_CURRENT_PRIM <<
61 VIVS_MC_PROFILE_CONFIG0_FE__SHIFT);
62 primid = gpu_read(gpu, VIVS_MC_PROFILE_FE_READ);
63 mutex_unlock(&gpu->lock);
64 }
65 if (gpu->state == ETNA_GPU_STATE_RUNNING &&
66 (gpu->completed_fence != gpu->hangcheck_fence ||
67 change < 0 || change > 16 ||
68 (submit->exec_state == ETNA_PIPE_3D &&
69 gpu->hangcheck_primid != primid))) {
70 gpu->hangcheck_dma_addr = dma_addr;
71 gpu->hangcheck_primid = primid;
72 gpu->hangcheck_fence = gpu->completed_fence;
73 goto out_no_timeout;
74 }
75
76 /* block scheduler */
77 drm_sched_stop(&gpu->sched, sched_job);
78
79 if(sched_job)
80 drm_sched_increase_karma(sched_job);
81
82 /* get the GPU back into the init state */
83 etnaviv_core_dump(submit);
84 etnaviv_gpu_recover_hang(submit);
85
86 drm_sched_resubmit_jobs(&gpu->sched);
87
88 drm_sched_start(&gpu->sched, 0);
89 return DRM_GPU_SCHED_STAT_NOMINAL;
90
91out_no_timeout:
92 list_add(&sched_job->list, &sched_job->sched->pending_list);
93 return DRM_GPU_SCHED_STAT_NOMINAL;
94}
95
96static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)
97{
98 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
99
100 drm_sched_job_cleanup(sched_job);
101
102 etnaviv_submit_put(submit);
103}
104
105static const struct drm_sched_backend_ops etnaviv_sched_ops = {
106 .run_job = etnaviv_sched_run_job,
107 .timedout_job = etnaviv_sched_timedout_job,
108 .free_job = etnaviv_sched_free_job,
109};
110
111int etnaviv_sched_push_job(struct etnaviv_gem_submit *submit)
112{
113 struct etnaviv_gpu *gpu = submit->gpu;
114 int ret;
115
116 /*
117 * Hold the sched lock across the whole operation to avoid jobs being
118 * pushed out of order with regard to their sched fence seqnos as
119 * allocated in drm_sched_job_arm.
120 */
121 mutex_lock(&gpu->sched_lock);
122
123 drm_sched_job_arm(&submit->sched_job);
124
125 submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
126 ret = xa_alloc_cyclic(&gpu->user_fences, &submit->out_fence_id,
127 submit->out_fence, xa_limit_32b,
128 &gpu->next_user_fence, GFP_KERNEL);
129 if (ret < 0) {
130 drm_sched_job_cleanup(&submit->sched_job);
131 goto out_unlock;
132 }
133
134 /* the scheduler holds on to the job now */
135 kref_get(&submit->refcount);
136
137 drm_sched_entity_push_job(&submit->sched_job);
138
139out_unlock:
140 mutex_unlock(&gpu->sched_lock);
141
142 return ret;
143}
144
145int etnaviv_sched_init(struct etnaviv_gpu *gpu)
146{
147 int ret;
148
149 ret = drm_sched_init(&gpu->sched, &etnaviv_sched_ops, NULL,
150 DRM_SCHED_PRIORITY_COUNT,
151 etnaviv_hw_jobs_limit, etnaviv_job_hang_limit,
152 msecs_to_jiffies(500), NULL, NULL,
153 dev_name(gpu->dev), gpu->dev);
154 if (ret)
155 return ret;
156
157 return 0;
158}
159
160void etnaviv_sched_fini(struct etnaviv_gpu *gpu)
161{
162 drm_sched_fini(&gpu->sched);
163}