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 #include "amdgpu_trace.h" 30 31 static void amdgpu_job_timedout(struct drm_sched_job *s_job) 32 { 33 struct amdgpu_ring *ring = to_amdgpu_ring(s_job->sched); 34 struct amdgpu_job *job = to_amdgpu_job(s_job); 35 36 DRM_ERROR("ring %s timeout, signaled seq=%u, emitted seq=%u\n", 37 job->base.sched->name, atomic_read(&ring->fence_drv.last_seq), 38 ring->fence_drv.sync_seq); 39 40 amdgpu_device_gpu_recover(ring->adev, job, false); 41 } 42 43 int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs, 44 struct amdgpu_job **job, struct amdgpu_vm *vm) 45 { 46 size_t size = sizeof(struct amdgpu_job); 47 48 if (num_ibs == 0) 49 return -EINVAL; 50 51 size += sizeof(struct amdgpu_ib) * num_ibs; 52 53 *job = kzalloc(size, GFP_KERNEL); 54 if (!*job) 55 return -ENOMEM; 56 57 /* 58 * Initialize the scheduler to at least some ring so that we always 59 * have a pointer to adev. 60 */ 61 (*job)->base.sched = &adev->rings[0]->sched; 62 (*job)->vm = vm; 63 (*job)->ibs = (void *)&(*job)[1]; 64 (*job)->num_ibs = num_ibs; 65 66 amdgpu_sync_create(&(*job)->sync); 67 amdgpu_sync_create(&(*job)->sched_sync); 68 (*job)->vram_lost_counter = atomic_read(&adev->vram_lost_counter); 69 (*job)->vm_pd_addr = AMDGPU_BO_INVALID_OFFSET; 70 71 return 0; 72 } 73 74 int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev, unsigned size, 75 struct amdgpu_job **job) 76 { 77 int r; 78 79 r = amdgpu_job_alloc(adev, 1, job, NULL); 80 if (r) 81 return r; 82 83 r = amdgpu_ib_get(adev, NULL, size, &(*job)->ibs[0]); 84 if (r) 85 kfree(*job); 86 else 87 (*job)->vm_pd_addr = adev->gart.table_addr; 88 89 return r; 90 } 91 92 void amdgpu_job_free_resources(struct amdgpu_job *job) 93 { 94 struct amdgpu_ring *ring = to_amdgpu_ring(job->base.sched); 95 struct dma_fence *f; 96 unsigned i; 97 98 /* use sched fence if available */ 99 f = job->base.s_fence ? &job->base.s_fence->finished : job->fence; 100 101 for (i = 0; i < job->num_ibs; ++i) 102 amdgpu_ib_free(ring->adev, &job->ibs[i], f); 103 } 104 105 static void amdgpu_job_free_cb(struct drm_sched_job *s_job) 106 { 107 struct amdgpu_ring *ring = to_amdgpu_ring(s_job->sched); 108 struct amdgpu_job *job = to_amdgpu_job(s_job); 109 110 amdgpu_ring_priority_put(ring, s_job->s_priority); 111 dma_fence_put(job->fence); 112 amdgpu_sync_free(&job->sync); 113 amdgpu_sync_free(&job->sched_sync); 114 kfree(job); 115 } 116 117 void amdgpu_job_free(struct amdgpu_job *job) 118 { 119 amdgpu_job_free_resources(job); 120 121 dma_fence_put(job->fence); 122 amdgpu_sync_free(&job->sync); 123 amdgpu_sync_free(&job->sched_sync); 124 kfree(job); 125 } 126 127 int amdgpu_job_submit(struct amdgpu_job *job, struct drm_sched_entity *entity, 128 void *owner, struct dma_fence **f) 129 { 130 enum drm_sched_priority priority; 131 struct amdgpu_ring *ring; 132 int r; 133 134 if (!f) 135 return -EINVAL; 136 137 r = drm_sched_job_init(&job->base, entity, owner); 138 if (r) 139 return r; 140 141 job->owner = owner; 142 *f = dma_fence_get(&job->base.s_fence->finished); 143 amdgpu_job_free_resources(job); 144 priority = job->base.s_priority; 145 drm_sched_entity_push_job(&job->base, entity); 146 147 ring = to_amdgpu_ring(entity->rq->sched); 148 amdgpu_ring_priority_get(ring, priority); 149 150 return 0; 151 } 152 153 int amdgpu_job_submit_direct(struct amdgpu_job *job, struct amdgpu_ring *ring, 154 struct dma_fence **fence) 155 { 156 int r; 157 158 job->base.sched = &ring->sched; 159 r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs, NULL, fence); 160 job->fence = dma_fence_get(*fence); 161 if (r) 162 return r; 163 164 amdgpu_job_free(job); 165 return 0; 166 } 167 168 static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job, 169 struct drm_sched_entity *s_entity) 170 { 171 struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched); 172 struct amdgpu_job *job = to_amdgpu_job(sched_job); 173 struct amdgpu_vm *vm = job->vm; 174 struct dma_fence *fence; 175 bool explicit = false; 176 int r; 177 178 fence = amdgpu_sync_get_fence(&job->sync, &explicit); 179 if (fence && explicit) { 180 if (drm_sched_dependency_optimized(fence, s_entity)) { 181 r = amdgpu_sync_fence(ring->adev, &job->sched_sync, 182 fence, false); 183 if (r) 184 DRM_ERROR("Error adding fence (%d)\n", r); 185 } 186 } 187 188 while (fence == NULL && vm && !job->vmid) { 189 r = amdgpu_vmid_grab(vm, ring, &job->sync, 190 &job->base.s_fence->finished, 191 job); 192 if (r) 193 DRM_ERROR("Error getting VM ID (%d)\n", r); 194 195 fence = amdgpu_sync_get_fence(&job->sync, NULL); 196 } 197 198 return fence; 199 } 200 201 static struct dma_fence *amdgpu_job_run(struct drm_sched_job *sched_job) 202 { 203 struct amdgpu_ring *ring = to_amdgpu_ring(sched_job->sched); 204 struct dma_fence *fence = NULL, *finished; 205 struct amdgpu_job *job; 206 int r = 0; 207 208 job = to_amdgpu_job(sched_job); 209 finished = &job->base.s_fence->finished; 210 211 BUG_ON(amdgpu_sync_peek_fence(&job->sync, NULL)); 212 213 trace_amdgpu_sched_run_job(job); 214 215 if (job->vram_lost_counter != atomic_read(&ring->adev->vram_lost_counter)) 216 dma_fence_set_error(finished, -ECANCELED);/* skip IB as well if VRAM lost */ 217 218 if (finished->error < 0) { 219 DRM_INFO("Skip scheduling IBs!\n"); 220 } else { 221 r = amdgpu_ib_schedule(ring, job->num_ibs, job->ibs, job, 222 &fence); 223 if (r) 224 DRM_ERROR("Error scheduling IBs (%d)\n", r); 225 } 226 /* if gpu reset, hw fence will be replaced here */ 227 dma_fence_put(job->fence); 228 job->fence = dma_fence_get(fence); 229 230 amdgpu_job_free_resources(job); 231 232 fence = r ? ERR_PTR(r) : fence; 233 return fence; 234 } 235 236 const struct drm_sched_backend_ops amdgpu_sched_ops = { 237 .dependency = amdgpu_job_dependency, 238 .run_job = amdgpu_job_run, 239 .timedout_job = amdgpu_job_timedout, 240 .free_job = amdgpu_job_free_cb 241 }; 242