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 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 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 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 91 out_no_timeout: 92 list_add(&sched_job->list, &sched_job->sched->pending_list); 93 return DRM_GPU_SCHED_STAT_NOMINAL; 94 } 95 96 static 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 } 104 105 static 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 }; 110 111 int 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); 138 139 out_unlock: 140 mutex_unlock(&gpu->sched_lock); 141 142 return ret; 143 } 144 145 int 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 } 159 160 void etnaviv_sched_fini(struct etnaviv_gpu *gpu) 161 { 162 drm_sched_fini(&gpu->sched); 163 } 164