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
16 static int etnaviv_job_hang_limit = 0;
17 module_param_named(job_hang_limit, etnaviv_job_hang_limit, int , 0444);
18 static int etnaviv_hw_jobs_limit = 4;
19 module_param_named(hw_job_limit, etnaviv_hw_jobs_limit, int , 0444);
20
etnaviv_sched_run_job(struct drm_sched_job * sched_job)21 static 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
etnaviv_sched_timedout_job(struct drm_sched_job * sched_job)34 static 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 drm_gpu_scheduler *sched = sched_job->sched;
39 struct etnaviv_gpu *gpu = submit->gpu;
40 u32 dma_addr, primid = 0;
41 int change;
42
43 /*
44 * If the GPU managed to complete this jobs fence, the timout is
45 * spurious. Bail out.
46 */
47 if (dma_fence_is_signaled(submit->out_fence))
48 goto out_no_timeout;
49
50 /*
51 * If the GPU is still making forward progress on the front-end (which
52 * should never loop) we shift out the timeout to give it a chance to
53 * finish the job.
54 */
55 dma_addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
56 change = dma_addr - gpu->hangcheck_dma_addr;
57 if (submit->exec_state == ETNA_PIPE_3D) {
58 /* guard against concurrent usage from perfmon_sample */
59 mutex_lock(&gpu->lock);
60 gpu_write(gpu, VIVS_MC_PROFILE_CONFIG0,
61 VIVS_MC_PROFILE_CONFIG0_FE_CURRENT_PRIM <<
62 VIVS_MC_PROFILE_CONFIG0_FE__SHIFT);
63 primid = gpu_read(gpu, VIVS_MC_PROFILE_FE_READ);
64 mutex_unlock(&gpu->lock);
65 }
66 if (gpu->state == ETNA_GPU_STATE_RUNNING &&
67 (gpu->completed_fence != gpu->hangcheck_fence ||
68 change < 0 || change > 16 ||
69 (submit->exec_state == ETNA_PIPE_3D &&
70 gpu->hangcheck_primid != primid))) {
71 gpu->hangcheck_dma_addr = dma_addr;
72 gpu->hangcheck_primid = primid;
73 gpu->hangcheck_fence = gpu->completed_fence;
74 goto out_no_timeout;
75 }
76
77 /* block scheduler */
78 drm_sched_stop(&gpu->sched, sched_job);
79
80 if(sched_job)
81 drm_sched_increase_karma(sched_job);
82
83 /* get the GPU back into the init state */
84 etnaviv_core_dump(submit);
85 etnaviv_gpu_recover_hang(submit);
86
87 drm_sched_resubmit_jobs(&gpu->sched);
88
89 drm_sched_start(&gpu->sched, 0);
90 return DRM_GPU_SCHED_STAT_NOMINAL;
91
92 out_no_timeout:
93 spin_lock(&sched->job_list_lock);
94 list_add(&sched_job->list, &sched->pending_list);
95 spin_unlock(&sched->job_list_lock);
96 return DRM_GPU_SCHED_STAT_NOMINAL;
97 }
98
etnaviv_sched_free_job(struct drm_sched_job * sched_job)99 static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)
100 {
101 struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
102
103 drm_sched_job_cleanup(sched_job);
104
105 etnaviv_submit_put(submit);
106 }
107
108 static const struct drm_sched_backend_ops etnaviv_sched_ops = {
109 .run_job = etnaviv_sched_run_job,
110 .timedout_job = etnaviv_sched_timedout_job,
111 .free_job = etnaviv_sched_free_job,
112 };
113
etnaviv_sched_push_job(struct etnaviv_gem_submit * submit)114 int etnaviv_sched_push_job(struct etnaviv_gem_submit *submit)
115 {
116 struct etnaviv_gpu *gpu = submit->gpu;
117 int ret;
118
119 /*
120 * Hold the sched lock across the whole operation to avoid jobs being
121 * pushed out of order with regard to their sched fence seqnos as
122 * allocated in drm_sched_job_arm.
123 */
124 mutex_lock(&gpu->sched_lock);
125
126 drm_sched_job_arm(&submit->sched_job);
127
128 submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
129 ret = xa_alloc_cyclic(&gpu->user_fences, &submit->out_fence_id,
130 submit->out_fence, xa_limit_32b,
131 &gpu->next_user_fence, GFP_KERNEL);
132 if (ret < 0) {
133 drm_sched_job_cleanup(&submit->sched_job);
134 goto out_unlock;
135 }
136
137 /* the scheduler holds on to the job now */
138 kref_get(&submit->refcount);
139
140 drm_sched_entity_push_job(&submit->sched_job);
141
142 out_unlock:
143 mutex_unlock(&gpu->sched_lock);
144
145 return ret;
146 }
147
etnaviv_sched_init(struct etnaviv_gpu * gpu)148 int etnaviv_sched_init(struct etnaviv_gpu *gpu)
149 {
150 const struct drm_sched_init_args args = {
151 .ops = &etnaviv_sched_ops,
152 .num_rqs = DRM_SCHED_PRIORITY_COUNT,
153 .credit_limit = etnaviv_hw_jobs_limit,
154 .hang_limit = etnaviv_job_hang_limit,
155 .timeout = msecs_to_jiffies(500),
156 .name = dev_name(gpu->dev),
157 .dev = gpu->dev,
158 };
159
160 return drm_sched_init(&gpu->sched, &args);
161 }
162
etnaviv_sched_fini(struct etnaviv_gpu * gpu)163 void etnaviv_sched_fini(struct etnaviv_gpu *gpu)
164 {
165 drm_sched_fini(&gpu->sched);
166 }
167