1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2015 Etnaviv Project 4 */ 5 6 #include <drm/drm_file.h> 7 #include <linux/dma-fence-array.h> 8 #include <linux/file.h> 9 #include <linux/pm_runtime.h> 10 #include <linux/dma-resv.h> 11 #include <linux/sync_file.h> 12 #include <linux/uaccess.h> 13 #include <linux/vmalloc.h> 14 15 #include "etnaviv_cmdbuf.h" 16 #include "etnaviv_drv.h" 17 #include "etnaviv_gpu.h" 18 #include "etnaviv_gem.h" 19 #include "etnaviv_perfmon.h" 20 #include "etnaviv_sched.h" 21 22 /* 23 * Cmdstream submission: 24 */ 25 26 #define BO_INVALID_FLAGS ~(ETNA_SUBMIT_BO_READ | ETNA_SUBMIT_BO_WRITE) 27 /* make sure these don't conflict w/ ETNAVIV_SUBMIT_BO_x */ 28 #define BO_LOCKED 0x4000 29 #define BO_PINNED 0x2000 30 31 static struct etnaviv_gem_submit *submit_create(struct drm_device *dev, 32 struct etnaviv_gpu *gpu, size_t nr_bos, size_t nr_pmrs) 33 { 34 struct etnaviv_gem_submit *submit; 35 size_t sz = size_vstruct(nr_bos, sizeof(submit->bos[0]), sizeof(*submit)); 36 37 submit = kzalloc(sz, GFP_KERNEL); 38 if (!submit) 39 return NULL; 40 41 submit->pmrs = kcalloc(nr_pmrs, sizeof(struct etnaviv_perfmon_request), 42 GFP_KERNEL); 43 if (!submit->pmrs) { 44 kfree(submit); 45 return NULL; 46 } 47 submit->nr_pmrs = nr_pmrs; 48 49 submit->gpu = gpu; 50 kref_init(&submit->refcount); 51 52 return submit; 53 } 54 55 static int submit_lookup_objects(struct etnaviv_gem_submit *submit, 56 struct drm_file *file, struct drm_etnaviv_gem_submit_bo *submit_bos, 57 unsigned nr_bos) 58 { 59 struct drm_etnaviv_gem_submit_bo *bo; 60 unsigned i; 61 int ret = 0; 62 63 spin_lock(&file->table_lock); 64 65 for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) { 66 struct drm_gem_object *obj; 67 68 if (bo->flags & BO_INVALID_FLAGS) { 69 DRM_ERROR("invalid flags: %x\n", bo->flags); 70 ret = -EINVAL; 71 goto out_unlock; 72 } 73 74 submit->bos[i].flags = bo->flags; 75 if (submit->flags & ETNA_SUBMIT_SOFTPIN) { 76 if (bo->presumed < ETNAVIV_SOFTPIN_START_ADDRESS) { 77 DRM_ERROR("invalid softpin address\n"); 78 ret = -EINVAL; 79 goto out_unlock; 80 } 81 submit->bos[i].va = bo->presumed; 82 } 83 84 /* normally use drm_gem_object_lookup(), but for bulk lookup 85 * all under single table_lock just hit object_idr directly: 86 */ 87 obj = idr_find(&file->object_idr, bo->handle); 88 if (!obj) { 89 DRM_ERROR("invalid handle %u at index %u\n", 90 bo->handle, i); 91 ret = -EINVAL; 92 goto out_unlock; 93 } 94 95 /* 96 * Take a refcount on the object. The file table lock 97 * prevents the object_idr's refcount on this being dropped. 98 */ 99 drm_gem_object_get(obj); 100 101 submit->bos[i].obj = to_etnaviv_bo(obj); 102 } 103 104 out_unlock: 105 submit->nr_bos = i; 106 spin_unlock(&file->table_lock); 107 108 return ret; 109 } 110 111 static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i) 112 { 113 if (submit->bos[i].flags & BO_LOCKED) { 114 struct drm_gem_object *obj = &submit->bos[i].obj->base; 115 116 dma_resv_unlock(obj->resv); 117 submit->bos[i].flags &= ~BO_LOCKED; 118 } 119 } 120 121 static int submit_lock_objects(struct etnaviv_gem_submit *submit, 122 struct ww_acquire_ctx *ticket) 123 { 124 int contended, slow_locked = -1, i, ret = 0; 125 126 retry: 127 for (i = 0; i < submit->nr_bos; i++) { 128 struct drm_gem_object *obj = &submit->bos[i].obj->base; 129 130 if (slow_locked == i) 131 slow_locked = -1; 132 133 contended = i; 134 135 if (!(submit->bos[i].flags & BO_LOCKED)) { 136 ret = dma_resv_lock_interruptible(obj->resv, ticket); 137 if (ret == -EALREADY) 138 DRM_ERROR("BO at index %u already on submit list\n", 139 i); 140 if (ret) 141 goto fail; 142 submit->bos[i].flags |= BO_LOCKED; 143 } 144 } 145 146 ww_acquire_done(ticket); 147 148 return 0; 149 150 fail: 151 for (; i >= 0; i--) 152 submit_unlock_object(submit, i); 153 154 if (slow_locked > 0) 155 submit_unlock_object(submit, slow_locked); 156 157 if (ret == -EDEADLK) { 158 struct drm_gem_object *obj; 159 160 obj = &submit->bos[contended].obj->base; 161 162 /* we lost out in a seqno race, lock and retry.. */ 163 ret = dma_resv_lock_slow_interruptible(obj->resv, ticket); 164 if (!ret) { 165 submit->bos[contended].flags |= BO_LOCKED; 166 slow_locked = contended; 167 goto retry; 168 } 169 } 170 171 return ret; 172 } 173 174 static int submit_fence_sync(struct etnaviv_gem_submit *submit) 175 { 176 int i, ret = 0; 177 178 for (i = 0; i < submit->nr_bos; i++) { 179 struct etnaviv_gem_submit_bo *bo = &submit->bos[i]; 180 struct dma_resv *robj = bo->obj->base.resv; 181 182 ret = dma_resv_reserve_fences(robj, 1); 183 if (ret) 184 return ret; 185 186 if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT) 187 continue; 188 189 ret = drm_sched_job_add_implicit_dependencies(&submit->sched_job, 190 &bo->obj->base, 191 bo->flags & ETNA_SUBMIT_BO_WRITE); 192 if (ret) 193 return ret; 194 } 195 196 return ret; 197 } 198 199 static void submit_attach_object_fences(struct etnaviv_gem_submit *submit) 200 { 201 int i; 202 203 for (i = 0; i < submit->nr_bos; i++) { 204 struct drm_gem_object *obj = &submit->bos[i].obj->base; 205 bool write = submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE; 206 207 dma_resv_add_fence(obj->resv, submit->out_fence, write ? 208 DMA_RESV_USAGE_WRITE : DMA_RESV_USAGE_READ); 209 submit_unlock_object(submit, i); 210 } 211 } 212 213 static int submit_pin_objects(struct etnaviv_gem_submit *submit) 214 { 215 int i, ret = 0; 216 217 for (i = 0; i < submit->nr_bos; i++) { 218 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj; 219 struct etnaviv_vram_mapping *mapping; 220 221 mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base, 222 submit->mmu_context, 223 submit->bos[i].va); 224 if (IS_ERR(mapping)) { 225 ret = PTR_ERR(mapping); 226 break; 227 } 228 229 if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && 230 submit->bos[i].va != mapping->iova) { 231 etnaviv_gem_mapping_unreference(mapping); 232 return -EINVAL; 233 } 234 235 atomic_inc(&etnaviv_obj->gpu_active); 236 237 submit->bos[i].flags |= BO_PINNED; 238 submit->bos[i].mapping = mapping; 239 } 240 241 return ret; 242 } 243 244 static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx, 245 struct etnaviv_gem_submit_bo **bo) 246 { 247 if (idx >= submit->nr_bos) { 248 DRM_ERROR("invalid buffer index: %u (out of %u)\n", 249 idx, submit->nr_bos); 250 return -EINVAL; 251 } 252 253 *bo = &submit->bos[idx]; 254 255 return 0; 256 } 257 258 /* process the reloc's and patch up the cmdstream as needed: */ 259 static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream, 260 u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs, 261 u32 nr_relocs) 262 { 263 u32 i, last_offset = 0; 264 u32 *ptr = stream; 265 int ret; 266 267 /* Submits using softpin don't blend with relocs */ 268 if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && nr_relocs != 0) 269 return -EINVAL; 270 271 for (i = 0; i < nr_relocs; i++) { 272 const struct drm_etnaviv_gem_submit_reloc *r = relocs + i; 273 struct etnaviv_gem_submit_bo *bo; 274 u32 off; 275 276 if (unlikely(r->flags)) { 277 DRM_ERROR("invalid reloc flags\n"); 278 return -EINVAL; 279 } 280 281 if (r->submit_offset % 4) { 282 DRM_ERROR("non-aligned reloc offset: %u\n", 283 r->submit_offset); 284 return -EINVAL; 285 } 286 287 /* offset in dwords: */ 288 off = r->submit_offset / 4; 289 290 if ((off >= size ) || 291 (off < last_offset)) { 292 DRM_ERROR("invalid offset %u at reloc %u\n", off, i); 293 return -EINVAL; 294 } 295 296 ret = submit_bo(submit, r->reloc_idx, &bo); 297 if (ret) 298 return ret; 299 300 if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) { 301 DRM_ERROR("relocation %u outside object\n", i); 302 return -EINVAL; 303 } 304 305 ptr[off] = bo->mapping->iova + r->reloc_offset; 306 307 last_offset = off; 308 } 309 310 return 0; 311 } 312 313 static int submit_perfmon_validate(struct etnaviv_gem_submit *submit, 314 u32 exec_state, const struct drm_etnaviv_gem_submit_pmr *pmrs) 315 { 316 u32 i; 317 318 for (i = 0; i < submit->nr_pmrs; i++) { 319 const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i; 320 struct etnaviv_gem_submit_bo *bo; 321 int ret; 322 323 ret = submit_bo(submit, r->read_idx, &bo); 324 if (ret) 325 return ret; 326 327 /* at offset 0 a sequence number gets stored used for userspace sync */ 328 if (r->read_offset == 0) { 329 DRM_ERROR("perfmon request: offset is 0"); 330 return -EINVAL; 331 } 332 333 if (r->read_offset >= bo->obj->base.size - sizeof(u32)) { 334 DRM_ERROR("perfmon request: offset %u outside object", i); 335 return -EINVAL; 336 } 337 338 if (r->flags & ~(ETNA_PM_PROCESS_PRE | ETNA_PM_PROCESS_POST)) { 339 DRM_ERROR("perfmon request: flags are not valid"); 340 return -EINVAL; 341 } 342 343 if (etnaviv_pm_req_validate(r, exec_state)) { 344 DRM_ERROR("perfmon request: domain or signal not valid"); 345 return -EINVAL; 346 } 347 348 submit->pmrs[i].flags = r->flags; 349 submit->pmrs[i].domain = r->domain; 350 submit->pmrs[i].signal = r->signal; 351 submit->pmrs[i].sequence = r->sequence; 352 submit->pmrs[i].offset = r->read_offset; 353 submit->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base); 354 } 355 356 return 0; 357 } 358 359 static void submit_cleanup(struct kref *kref) 360 { 361 struct etnaviv_gem_submit *submit = 362 container_of(kref, struct etnaviv_gem_submit, refcount); 363 unsigned i; 364 365 if (submit->cmdbuf.suballoc) 366 etnaviv_cmdbuf_free(&submit->cmdbuf); 367 368 if (submit->mmu_context) 369 etnaviv_iommu_context_put(submit->mmu_context); 370 371 if (submit->prev_mmu_context) 372 etnaviv_iommu_context_put(submit->prev_mmu_context); 373 374 for (i = 0; i < submit->nr_bos; i++) { 375 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj; 376 377 /* unpin all objects */ 378 if (submit->bos[i].flags & BO_PINNED) { 379 etnaviv_gem_mapping_unreference(submit->bos[i].mapping); 380 atomic_dec(&etnaviv_obj->gpu_active); 381 submit->bos[i].mapping = NULL; 382 submit->bos[i].flags &= ~BO_PINNED; 383 } 384 385 /* if the GPU submit failed, objects might still be locked */ 386 submit_unlock_object(submit, i); 387 drm_gem_object_put(&etnaviv_obj->base); 388 } 389 390 wake_up_all(&submit->gpu->fence_event); 391 392 if (submit->out_fence) { 393 /* 394 * Remove from user fence array before dropping the reference, 395 * so fence can not be found in lookup anymore. 396 */ 397 xa_erase(&submit->gpu->user_fences, submit->out_fence_id); 398 dma_fence_put(submit->out_fence); 399 } 400 401 put_pid(submit->pid); 402 403 kfree(submit->pmrs); 404 kfree(submit); 405 } 406 407 void etnaviv_submit_put(struct etnaviv_gem_submit *submit) 408 { 409 kref_put(&submit->refcount, submit_cleanup); 410 } 411 412 int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data, 413 struct drm_file *file) 414 { 415 struct etnaviv_file_private *ctx = file->driver_priv; 416 struct etnaviv_drm_private *priv = dev->dev_private; 417 struct drm_etnaviv_gem_submit *args = data; 418 struct drm_etnaviv_gem_submit_reloc *relocs; 419 struct drm_etnaviv_gem_submit_pmr *pmrs; 420 struct drm_etnaviv_gem_submit_bo *bos; 421 struct etnaviv_gem_submit *submit; 422 struct etnaviv_gpu *gpu; 423 struct sync_file *sync_file = NULL; 424 struct ww_acquire_ctx ticket; 425 int out_fence_fd = -1; 426 struct pid *pid = get_pid(task_pid(current)); 427 void *stream; 428 int ret; 429 430 if (args->pipe >= ETNA_MAX_PIPES) 431 return -EINVAL; 432 433 gpu = priv->gpu[args->pipe]; 434 if (!gpu) 435 return -ENXIO; 436 437 if (args->stream_size % 4) { 438 DRM_ERROR("non-aligned cmdstream buffer size: %u\n", 439 args->stream_size); 440 return -EINVAL; 441 } 442 443 if (args->exec_state != ETNA_PIPE_3D && 444 args->exec_state != ETNA_PIPE_2D && 445 args->exec_state != ETNA_PIPE_VG) { 446 DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state); 447 return -EINVAL; 448 } 449 450 if (args->flags & ~ETNA_SUBMIT_FLAGS) { 451 DRM_ERROR("invalid flags: 0x%x\n", args->flags); 452 return -EINVAL; 453 } 454 455 if ((args->flags & ETNA_SUBMIT_SOFTPIN) && 456 priv->mmu_global->version != ETNAVIV_IOMMU_V2) { 457 DRM_ERROR("softpin requested on incompatible MMU\n"); 458 return -EINVAL; 459 } 460 461 if (args->stream_size > SZ_128K || args->nr_relocs > SZ_128K || 462 args->nr_bos > SZ_128K || args->nr_pmrs > 128) { 463 DRM_ERROR("submit arguments out of size limits\n"); 464 return -EINVAL; 465 } 466 467 /* 468 * Copy the command submission and bo array to kernel space in 469 * one go, and do this outside of any locks. 470 */ 471 bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL); 472 relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL); 473 pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL); 474 stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL); 475 if (!bos || !relocs || !pmrs || !stream) { 476 ret = -ENOMEM; 477 goto err_submit_cmds; 478 } 479 480 ret = copy_from_user(bos, u64_to_user_ptr(args->bos), 481 args->nr_bos * sizeof(*bos)); 482 if (ret) { 483 ret = -EFAULT; 484 goto err_submit_cmds; 485 } 486 487 ret = copy_from_user(relocs, u64_to_user_ptr(args->relocs), 488 args->nr_relocs * sizeof(*relocs)); 489 if (ret) { 490 ret = -EFAULT; 491 goto err_submit_cmds; 492 } 493 494 ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs), 495 args->nr_pmrs * sizeof(*pmrs)); 496 if (ret) { 497 ret = -EFAULT; 498 goto err_submit_cmds; 499 } 500 501 ret = copy_from_user(stream, u64_to_user_ptr(args->stream), 502 args->stream_size); 503 if (ret) { 504 ret = -EFAULT; 505 goto err_submit_cmds; 506 } 507 508 if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) { 509 out_fence_fd = get_unused_fd_flags(O_CLOEXEC); 510 if (out_fence_fd < 0) { 511 ret = out_fence_fd; 512 goto err_submit_cmds; 513 } 514 } 515 516 ww_acquire_init(&ticket, &reservation_ww_class); 517 518 submit = submit_create(dev, gpu, args->nr_bos, args->nr_pmrs); 519 if (!submit) { 520 ret = -ENOMEM; 521 goto err_submit_ww_acquire; 522 } 523 524 submit->pid = pid; 525 526 ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &submit->cmdbuf, 527 ALIGN(args->stream_size, 8) + 8); 528 if (ret) 529 goto err_submit_put; 530 531 submit->ctx = file->driver_priv; 532 submit->mmu_context = etnaviv_iommu_context_get(submit->ctx->mmu); 533 submit->exec_state = args->exec_state; 534 submit->flags = args->flags; 535 536 ret = drm_sched_job_init(&submit->sched_job, 537 &ctx->sched_entity[args->pipe], 538 1, submit->ctx); 539 if (ret) 540 goto err_submit_put; 541 542 ret = submit_lookup_objects(submit, file, bos, args->nr_bos); 543 if (ret) 544 goto err_submit_job; 545 546 if ((priv->mmu_global->version != ETNAVIV_IOMMU_V2) && 547 !etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4, 548 relocs, args->nr_relocs)) { 549 ret = -EINVAL; 550 goto err_submit_job; 551 } 552 553 if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) { 554 struct dma_fence *in_fence = sync_file_get_fence(args->fence_fd); 555 if (!in_fence) { 556 ret = -EINVAL; 557 goto err_submit_job; 558 } 559 560 ret = drm_sched_job_add_dependency(&submit->sched_job, 561 in_fence); 562 if (ret) 563 goto err_submit_job; 564 } 565 566 ret = submit_pin_objects(submit); 567 if (ret) 568 goto err_submit_job; 569 570 ret = submit_reloc(submit, stream, args->stream_size / 4, 571 relocs, args->nr_relocs); 572 if (ret) 573 goto err_submit_job; 574 575 ret = submit_perfmon_validate(submit, args->exec_state, pmrs); 576 if (ret) 577 goto err_submit_job; 578 579 memcpy(submit->cmdbuf.vaddr, stream, args->stream_size); 580 581 ret = submit_lock_objects(submit, &ticket); 582 if (ret) 583 goto err_submit_job; 584 585 ret = submit_fence_sync(submit); 586 if (ret) 587 goto err_submit_job; 588 589 ret = etnaviv_sched_push_job(submit); 590 if (ret) 591 goto err_submit_job; 592 593 submit_attach_object_fences(submit); 594 595 if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) { 596 /* 597 * This can be improved: ideally we want to allocate the sync 598 * file before kicking off the GPU job and just attach the 599 * fence to the sync file here, eliminating the ENOMEM 600 * possibility at this stage. 601 */ 602 sync_file = sync_file_create(submit->out_fence); 603 if (!sync_file) { 604 ret = -ENOMEM; 605 /* 606 * When this late error is hit, the submit has already 607 * been handed over to the scheduler. At this point 608 * the sched_job must not be cleaned up. 609 */ 610 goto err_submit_put; 611 } 612 fd_install(out_fence_fd, sync_file->file); 613 } 614 615 args->fence_fd = out_fence_fd; 616 args->fence = submit->out_fence_id; 617 618 err_submit_job: 619 if (ret) 620 drm_sched_job_cleanup(&submit->sched_job); 621 err_submit_put: 622 etnaviv_submit_put(submit); 623 624 err_submit_ww_acquire: 625 ww_acquire_fini(&ticket); 626 627 err_submit_cmds: 628 if (ret && (out_fence_fd >= 0)) 629 put_unused_fd(out_fence_fd); 630 kvfree(stream); 631 kvfree(bos); 632 kvfree(relocs); 633 kvfree(pmrs); 634 635 return ret; 636 } 637