1 /* 2 * Copyright 2008 Advanced Micro Devices, Inc. 3 * Copyright 2008 Red Hat Inc. 4 * Copyright 2009 Jerome Glisse. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Dave Airlie 25 * Alex Deucher 26 * Jerome Glisse 27 * Christian König 28 */ 29 #include <linux/seq_file.h> 30 #include <linux/slab.h> 31 #include <drm/drmP.h> 32 #include <drm/amdgpu_drm.h> 33 #include "amdgpu.h" 34 #include "atom.h" 35 36 #define AMDGPU_IB_TEST_TIMEOUT msecs_to_jiffies(1000) 37 38 /* 39 * IB 40 * IBs (Indirect Buffers) and areas of GPU accessible memory where 41 * commands are stored. You can put a pointer to the IB in the 42 * command ring and the hw will fetch the commands from the IB 43 * and execute them. Generally userspace acceleration drivers 44 * produce command buffers which are send to the kernel and 45 * put in IBs for execution by the requested ring. 46 */ 47 static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev); 48 49 /** 50 * amdgpu_ib_get - request an IB (Indirect Buffer) 51 * 52 * @ring: ring index the IB is associated with 53 * @size: requested IB size 54 * @ib: IB object returned 55 * 56 * Request an IB (all asics). IBs are allocated using the 57 * suballocator. 58 * Returns 0 on success, error on failure. 59 */ 60 int amdgpu_ib_get(struct amdgpu_device *adev, struct amdgpu_vm *vm, 61 unsigned size, struct amdgpu_ib *ib) 62 { 63 int r; 64 65 if (size) { 66 r = amdgpu_sa_bo_new(&adev->ring_tmp_bo, 67 &ib->sa_bo, size, 256); 68 if (r) { 69 dev_err(adev->dev, "failed to get a new IB (%d)\n", r); 70 return r; 71 } 72 73 ib->ptr = amdgpu_sa_bo_cpu_addr(ib->sa_bo); 74 75 if (!vm) 76 ib->gpu_addr = amdgpu_sa_bo_gpu_addr(ib->sa_bo); 77 } 78 79 return 0; 80 } 81 82 /** 83 * amdgpu_ib_free - free an IB (Indirect Buffer) 84 * 85 * @adev: amdgpu_device pointer 86 * @ib: IB object to free 87 * @f: the fence SA bo need wait on for the ib alloation 88 * 89 * Free an IB (all asics). 90 */ 91 void amdgpu_ib_free(struct amdgpu_device *adev, struct amdgpu_ib *ib, 92 struct dma_fence *f) 93 { 94 amdgpu_sa_bo_free(adev, &ib->sa_bo, f); 95 } 96 97 /** 98 * amdgpu_ib_schedule - schedule an IB (Indirect Buffer) on the ring 99 * 100 * @adev: amdgpu_device pointer 101 * @num_ibs: number of IBs to schedule 102 * @ibs: IB objects to schedule 103 * @f: fence created during this submission 104 * 105 * Schedule an IB on the associated ring (all asics). 106 * Returns 0 on success, error on failure. 107 * 108 * On SI, there are two parallel engines fed from the primary ring, 109 * the CE (Constant Engine) and the DE (Drawing Engine). Since 110 * resource descriptors have moved to memory, the CE allows you to 111 * prime the caches while the DE is updating register state so that 112 * the resource descriptors will be already in cache when the draw is 113 * processed. To accomplish this, the userspace driver submits two 114 * IBs, one for the CE and one for the DE. If there is a CE IB (called 115 * a CONST_IB), it will be put on the ring prior to the DE IB. Prior 116 * to SI there was just a DE IB. 117 */ 118 int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs, 119 struct amdgpu_ib *ibs, struct amdgpu_job *job, 120 struct dma_fence **f) 121 { 122 struct amdgpu_device *adev = ring->adev; 123 struct amdgpu_ib *ib = &ibs[0]; 124 struct dma_fence *tmp = NULL; 125 bool skip_preamble, need_ctx_switch; 126 unsigned patch_offset = ~0; 127 struct amdgpu_vm *vm; 128 uint64_t fence_ctx; 129 uint32_t status = 0, alloc_size; 130 131 unsigned i; 132 int r = 0; 133 bool need_pipe_sync = false; 134 135 if (num_ibs == 0) 136 return -EINVAL; 137 138 /* ring tests don't use a job */ 139 if (job) { 140 vm = job->vm; 141 fence_ctx = job->fence_ctx; 142 } else { 143 vm = NULL; 144 fence_ctx = 0; 145 } 146 147 if (!ring->ready) { 148 dev_err(adev->dev, "couldn't schedule ib on ring <%s>\n", ring->name); 149 return -EINVAL; 150 } 151 152 if (vm && !job->vm_id) { 153 dev_err(adev->dev, "VM IB without ID\n"); 154 return -EINVAL; 155 } 156 157 alloc_size = ring->funcs->emit_frame_size + num_ibs * 158 ring->funcs->emit_ib_size; 159 160 r = amdgpu_ring_alloc(ring, alloc_size); 161 if (r) { 162 dev_err(adev->dev, "scheduling IB failed (%d).\n", r); 163 return r; 164 } 165 166 if (ring->funcs->emit_pipeline_sync && job && 167 ((tmp = amdgpu_sync_get_fence(&job->sched_sync)) || 168 amdgpu_vm_need_pipeline_sync(ring, job))) { 169 need_pipe_sync = true; 170 dma_fence_put(tmp); 171 } 172 173 if (ring->funcs->insert_start) 174 ring->funcs->insert_start(ring); 175 176 if (job) { 177 r = amdgpu_vm_flush(ring, job, need_pipe_sync); 178 if (r) { 179 amdgpu_ring_undo(ring); 180 return r; 181 } 182 } 183 184 if (ring->funcs->init_cond_exec) 185 patch_offset = amdgpu_ring_init_cond_exec(ring); 186 187 if (ring->funcs->emit_hdp_flush 188 #ifdef CONFIG_X86_64 189 && !(adev->flags & AMD_IS_APU) 190 #endif 191 ) 192 amdgpu_ring_emit_hdp_flush(ring); 193 194 skip_preamble = ring->current_ctx == fence_ctx; 195 need_ctx_switch = ring->current_ctx != fence_ctx; 196 if (job && ring->funcs->emit_cntxcntl) { 197 if (need_ctx_switch) 198 status |= AMDGPU_HAVE_CTX_SWITCH; 199 status |= job->preamble_status; 200 201 amdgpu_ring_emit_cntxcntl(ring, status); 202 } 203 204 for (i = 0; i < num_ibs; ++i) { 205 ib = &ibs[i]; 206 207 /* drop preamble IBs if we don't have a context switch */ 208 if ((ib->flags & AMDGPU_IB_FLAG_PREAMBLE) && 209 skip_preamble && 210 !(status & AMDGPU_PREAMBLE_IB_PRESENT_FIRST) && 211 !amdgpu_sriov_vf(adev)) /* for SRIOV preemption, Preamble CE ib must be inserted anyway */ 212 continue; 213 214 amdgpu_ring_emit_ib(ring, ib, job ? job->vm_id : 0, 215 need_ctx_switch); 216 need_ctx_switch = false; 217 } 218 219 if (ring->funcs->emit_tmz) 220 amdgpu_ring_emit_tmz(ring, false); 221 222 if (ring->funcs->emit_hdp_invalidate 223 #ifdef CONFIG_X86_64 224 && !(adev->flags & AMD_IS_APU) 225 #endif 226 ) 227 amdgpu_ring_emit_hdp_invalidate(ring); 228 229 r = amdgpu_fence_emit(ring, f); 230 if (r) { 231 dev_err(adev->dev, "failed to emit fence (%d)\n", r); 232 if (job && job->vm_id) 233 amdgpu_vm_reset_id(adev, ring->funcs->vmhub, 234 job->vm_id); 235 amdgpu_ring_undo(ring); 236 return r; 237 } 238 239 if (ring->funcs->insert_end) 240 ring->funcs->insert_end(ring); 241 242 /* wrap the last IB with fence */ 243 if (job && job->uf_addr) { 244 amdgpu_ring_emit_fence(ring, job->uf_addr, job->uf_sequence, 245 AMDGPU_FENCE_FLAG_64BIT); 246 } 247 248 if (patch_offset != ~0 && ring->funcs->patch_cond_exec) 249 amdgpu_ring_patch_cond_exec(ring, patch_offset); 250 251 ring->current_ctx = fence_ctx; 252 if (vm && ring->funcs->emit_switch_buffer) 253 amdgpu_ring_emit_switch_buffer(ring); 254 amdgpu_ring_commit(ring); 255 return 0; 256 } 257 258 /** 259 * amdgpu_ib_pool_init - Init the IB (Indirect Buffer) pool 260 * 261 * @adev: amdgpu_device pointer 262 * 263 * Initialize the suballocator to manage a pool of memory 264 * for use as IBs (all asics). 265 * Returns 0 on success, error on failure. 266 */ 267 int amdgpu_ib_pool_init(struct amdgpu_device *adev) 268 { 269 int r; 270 271 if (adev->ib_pool_ready) { 272 return 0; 273 } 274 r = amdgpu_sa_bo_manager_init(adev, &adev->ring_tmp_bo, 275 AMDGPU_IB_POOL_SIZE*64*1024, 276 AMDGPU_GPU_PAGE_SIZE, 277 AMDGPU_GEM_DOMAIN_GTT); 278 if (r) { 279 return r; 280 } 281 282 r = amdgpu_sa_bo_manager_start(adev, &adev->ring_tmp_bo); 283 if (r) { 284 return r; 285 } 286 287 adev->ib_pool_ready = true; 288 if (amdgpu_debugfs_sa_init(adev)) { 289 dev_err(adev->dev, "failed to register debugfs file for SA\n"); 290 } 291 return 0; 292 } 293 294 /** 295 * amdgpu_ib_pool_fini - Free the IB (Indirect Buffer) pool 296 * 297 * @adev: amdgpu_device pointer 298 * 299 * Tear down the suballocator managing the pool of memory 300 * for use as IBs (all asics). 301 */ 302 void amdgpu_ib_pool_fini(struct amdgpu_device *adev) 303 { 304 if (adev->ib_pool_ready) { 305 amdgpu_sa_bo_manager_suspend(adev, &adev->ring_tmp_bo); 306 amdgpu_sa_bo_manager_fini(adev, &adev->ring_tmp_bo); 307 adev->ib_pool_ready = false; 308 } 309 } 310 311 /** 312 * amdgpu_ib_ring_tests - test IBs on the rings 313 * 314 * @adev: amdgpu_device pointer 315 * 316 * Test an IB (Indirect Buffer) on each ring. 317 * If the test fails, disable the ring. 318 * Returns 0 on success, error if the primary GFX ring 319 * IB test fails. 320 */ 321 int amdgpu_ib_ring_tests(struct amdgpu_device *adev) 322 { 323 unsigned i; 324 int r, ret = 0; 325 326 for (i = 0; i < AMDGPU_MAX_RINGS; ++i) { 327 struct amdgpu_ring *ring = adev->rings[i]; 328 329 if (!ring || !ring->ready) 330 continue; 331 332 r = amdgpu_ring_test_ib(ring, AMDGPU_IB_TEST_TIMEOUT); 333 if (r) { 334 ring->ready = false; 335 336 if (ring == &adev->gfx.gfx_ring[0]) { 337 /* oh, oh, that's really bad */ 338 DRM_ERROR("amdgpu: failed testing IB on GFX ring (%d).\n", r); 339 adev->accel_working = false; 340 return r; 341 342 } else { 343 /* still not good, but we can live with it */ 344 DRM_ERROR("amdgpu: failed testing IB on ring %d (%d).\n", i, r); 345 ret = r; 346 } 347 } 348 } 349 return ret; 350 } 351 352 /* 353 * Debugfs info 354 */ 355 #if defined(CONFIG_DEBUG_FS) 356 357 static int amdgpu_debugfs_sa_info(struct seq_file *m, void *data) 358 { 359 struct drm_info_node *node = (struct drm_info_node *) m->private; 360 struct drm_device *dev = node->minor->dev; 361 struct amdgpu_device *adev = dev->dev_private; 362 363 amdgpu_sa_bo_dump_debug_info(&adev->ring_tmp_bo, m); 364 365 return 0; 366 367 } 368 369 static const struct drm_info_list amdgpu_debugfs_sa_list[] = { 370 {"amdgpu_sa_info", &amdgpu_debugfs_sa_info, 0, NULL}, 371 }; 372 373 #endif 374 375 static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev) 376 { 377 #if defined(CONFIG_DEBUG_FS) 378 return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_sa_list, 1); 379 #else 380 return 0; 381 #endif 382 } 383