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 if (!(bo->flags & ETNA_SUBMIT_BO_WRITE)) { 183 ret = dma_resv_reserve_shared(robj, 1); 184 if (ret) 185 return ret; 186 } 187 188 if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT) 189 continue; 190 191 ret = dma_resv_get_fences(robj, 192 bo->flags & ETNA_SUBMIT_BO_WRITE, 193 &bo->nr_fences, &bo->fences); 194 if (ret) 195 return ret; 196 } 197 198 return ret; 199 } 200 201 static void submit_attach_object_fences(struct etnaviv_gem_submit *submit) 202 { 203 int i; 204 205 for (i = 0; i < submit->nr_bos; i++) { 206 struct drm_gem_object *obj = &submit->bos[i].obj->base; 207 208 if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE) 209 dma_resv_add_excl_fence(obj->resv, 210 submit->out_fence); 211 else 212 dma_resv_add_shared_fence(obj->resv, 213 submit->out_fence); 214 215 submit_unlock_object(submit, i); 216 } 217 } 218 219 static int submit_pin_objects(struct etnaviv_gem_submit *submit) 220 { 221 int i, ret = 0; 222 223 for (i = 0; i < submit->nr_bos; i++) { 224 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj; 225 struct etnaviv_vram_mapping *mapping; 226 227 mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base, 228 submit->mmu_context, 229 submit->bos[i].va); 230 if (IS_ERR(mapping)) { 231 ret = PTR_ERR(mapping); 232 break; 233 } 234 235 if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && 236 submit->bos[i].va != mapping->iova) { 237 etnaviv_gem_mapping_unreference(mapping); 238 return -EINVAL; 239 } 240 241 atomic_inc(&etnaviv_obj->gpu_active); 242 243 submit->bos[i].flags |= BO_PINNED; 244 submit->bos[i].mapping = mapping; 245 } 246 247 return ret; 248 } 249 250 static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx, 251 struct etnaviv_gem_submit_bo **bo) 252 { 253 if (idx >= submit->nr_bos) { 254 DRM_ERROR("invalid buffer index: %u (out of %u)\n", 255 idx, submit->nr_bos); 256 return -EINVAL; 257 } 258 259 *bo = &submit->bos[idx]; 260 261 return 0; 262 } 263 264 /* process the reloc's and patch up the cmdstream as needed: */ 265 static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream, 266 u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs, 267 u32 nr_relocs) 268 { 269 u32 i, last_offset = 0; 270 u32 *ptr = stream; 271 int ret; 272 273 /* Submits using softpin don't blend with relocs */ 274 if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && nr_relocs != 0) 275 return -EINVAL; 276 277 for (i = 0; i < nr_relocs; i++) { 278 const struct drm_etnaviv_gem_submit_reloc *r = relocs + i; 279 struct etnaviv_gem_submit_bo *bo; 280 u32 off; 281 282 if (unlikely(r->flags)) { 283 DRM_ERROR("invalid reloc flags\n"); 284 return -EINVAL; 285 } 286 287 if (r->submit_offset % 4) { 288 DRM_ERROR("non-aligned reloc offset: %u\n", 289 r->submit_offset); 290 return -EINVAL; 291 } 292 293 /* offset in dwords: */ 294 off = r->submit_offset / 4; 295 296 if ((off >= size ) || 297 (off < last_offset)) { 298 DRM_ERROR("invalid offset %u at reloc %u\n", off, i); 299 return -EINVAL; 300 } 301 302 ret = submit_bo(submit, r->reloc_idx, &bo); 303 if (ret) 304 return ret; 305 306 if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) { 307 DRM_ERROR("relocation %u outside object\n", i); 308 return -EINVAL; 309 } 310 311 ptr[off] = bo->mapping->iova + r->reloc_offset; 312 313 last_offset = off; 314 } 315 316 return 0; 317 } 318 319 static int submit_perfmon_validate(struct etnaviv_gem_submit *submit, 320 u32 exec_state, const struct drm_etnaviv_gem_submit_pmr *pmrs) 321 { 322 u32 i; 323 324 for (i = 0; i < submit->nr_pmrs; i++) { 325 const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i; 326 struct etnaviv_gem_submit_bo *bo; 327 int ret; 328 329 ret = submit_bo(submit, r->read_idx, &bo); 330 if (ret) 331 return ret; 332 333 /* at offset 0 a sequence number gets stored used for userspace sync */ 334 if (r->read_offset == 0) { 335 DRM_ERROR("perfmon request: offset is 0"); 336 return -EINVAL; 337 } 338 339 if (r->read_offset >= bo->obj->base.size - sizeof(u32)) { 340 DRM_ERROR("perfmon request: offset %u outside object", i); 341 return -EINVAL; 342 } 343 344 if (r->flags & ~(ETNA_PM_PROCESS_PRE | ETNA_PM_PROCESS_POST)) { 345 DRM_ERROR("perfmon request: flags are not valid"); 346 return -EINVAL; 347 } 348 349 if (etnaviv_pm_req_validate(r, exec_state)) { 350 DRM_ERROR("perfmon request: domain or signal not valid"); 351 return -EINVAL; 352 } 353 354 submit->pmrs[i].flags = r->flags; 355 submit->pmrs[i].domain = r->domain; 356 submit->pmrs[i].signal = r->signal; 357 submit->pmrs[i].sequence = r->sequence; 358 submit->pmrs[i].offset = r->read_offset; 359 submit->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base); 360 } 361 362 return 0; 363 } 364 365 static void submit_cleanup(struct kref *kref) 366 { 367 struct etnaviv_gem_submit *submit = 368 container_of(kref, struct etnaviv_gem_submit, refcount); 369 unsigned i; 370 371 if (submit->runtime_resumed) 372 pm_runtime_put_autosuspend(submit->gpu->dev); 373 374 if (submit->cmdbuf.suballoc) 375 etnaviv_cmdbuf_free(&submit->cmdbuf); 376 377 if (submit->mmu_context) 378 etnaviv_iommu_context_put(submit->mmu_context); 379 380 if (submit->prev_mmu_context) 381 etnaviv_iommu_context_put(submit->prev_mmu_context); 382 383 for (i = 0; i < submit->nr_bos; i++) { 384 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj; 385 386 /* unpin all objects */ 387 if (submit->bos[i].flags & BO_PINNED) { 388 etnaviv_gem_mapping_unreference(submit->bos[i].mapping); 389 atomic_dec(&etnaviv_obj->gpu_active); 390 submit->bos[i].mapping = NULL; 391 submit->bos[i].flags &= ~BO_PINNED; 392 } 393 394 /* if the GPU submit failed, objects might still be locked */ 395 submit_unlock_object(submit, i); 396 drm_gem_object_put(&etnaviv_obj->base); 397 } 398 399 wake_up_all(&submit->gpu->fence_event); 400 401 if (submit->in_fence) 402 dma_fence_put(submit->in_fence); 403 if (submit->out_fence) { 404 /* first remove from IDR, so fence can not be found anymore */ 405 mutex_lock(&submit->gpu->fence_lock); 406 idr_remove(&submit->gpu->fence_idr, submit->out_fence_id); 407 mutex_unlock(&submit->gpu->fence_lock); 408 dma_fence_put(submit->out_fence); 409 } 410 kfree(submit->pmrs); 411 kfree(submit); 412 } 413 414 void etnaviv_submit_put(struct etnaviv_gem_submit *submit) 415 { 416 kref_put(&submit->refcount, submit_cleanup); 417 } 418 419 int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data, 420 struct drm_file *file) 421 { 422 struct etnaviv_file_private *ctx = file->driver_priv; 423 struct etnaviv_drm_private *priv = dev->dev_private; 424 struct drm_etnaviv_gem_submit *args = data; 425 struct drm_etnaviv_gem_submit_reloc *relocs; 426 struct drm_etnaviv_gem_submit_pmr *pmrs; 427 struct drm_etnaviv_gem_submit_bo *bos; 428 struct etnaviv_gem_submit *submit; 429 struct etnaviv_gpu *gpu; 430 struct sync_file *sync_file = NULL; 431 struct ww_acquire_ctx ticket; 432 int out_fence_fd = -1; 433 void *stream; 434 int ret; 435 436 if (args->pipe >= ETNA_MAX_PIPES) 437 return -EINVAL; 438 439 gpu = priv->gpu[args->pipe]; 440 if (!gpu) 441 return -ENXIO; 442 443 if (args->stream_size % 4) { 444 DRM_ERROR("non-aligned cmdstream buffer size: %u\n", 445 args->stream_size); 446 return -EINVAL; 447 } 448 449 if (args->exec_state != ETNA_PIPE_3D && 450 args->exec_state != ETNA_PIPE_2D && 451 args->exec_state != ETNA_PIPE_VG) { 452 DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state); 453 return -EINVAL; 454 } 455 456 if (args->flags & ~ETNA_SUBMIT_FLAGS) { 457 DRM_ERROR("invalid flags: 0x%x\n", args->flags); 458 return -EINVAL; 459 } 460 461 if ((args->flags & ETNA_SUBMIT_SOFTPIN) && 462 priv->mmu_global->version != ETNAVIV_IOMMU_V2) { 463 DRM_ERROR("softpin requested on incompatible MMU\n"); 464 return -EINVAL; 465 } 466 467 if (args->stream_size > SZ_128K || args->nr_relocs > SZ_128K || 468 args->nr_bos > SZ_128K || args->nr_pmrs > 128) { 469 DRM_ERROR("submit arguments out of size limits\n"); 470 return -EINVAL; 471 } 472 473 /* 474 * Copy the command submission and bo array to kernel space in 475 * one go, and do this outside of any locks. 476 */ 477 bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL); 478 relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL); 479 pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL); 480 stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL); 481 if (!bos || !relocs || !pmrs || !stream) { 482 ret = -ENOMEM; 483 goto err_submit_cmds; 484 } 485 486 ret = copy_from_user(bos, u64_to_user_ptr(args->bos), 487 args->nr_bos * sizeof(*bos)); 488 if (ret) { 489 ret = -EFAULT; 490 goto err_submit_cmds; 491 } 492 493 ret = copy_from_user(relocs, u64_to_user_ptr(args->relocs), 494 args->nr_relocs * sizeof(*relocs)); 495 if (ret) { 496 ret = -EFAULT; 497 goto err_submit_cmds; 498 } 499 500 ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs), 501 args->nr_pmrs * sizeof(*pmrs)); 502 if (ret) { 503 ret = -EFAULT; 504 goto err_submit_cmds; 505 } 506 507 ret = copy_from_user(stream, u64_to_user_ptr(args->stream), 508 args->stream_size); 509 if (ret) { 510 ret = -EFAULT; 511 goto err_submit_cmds; 512 } 513 514 if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) { 515 out_fence_fd = get_unused_fd_flags(O_CLOEXEC); 516 if (out_fence_fd < 0) { 517 ret = out_fence_fd; 518 goto err_submit_cmds; 519 } 520 } 521 522 ww_acquire_init(&ticket, &reservation_ww_class); 523 524 submit = submit_create(dev, gpu, args->nr_bos, args->nr_pmrs); 525 if (!submit) { 526 ret = -ENOMEM; 527 goto err_submit_ww_acquire; 528 } 529 530 ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &submit->cmdbuf, 531 ALIGN(args->stream_size, 8) + 8); 532 if (ret) 533 goto err_submit_objects; 534 535 submit->ctx = file->driver_priv; 536 submit->mmu_context = etnaviv_iommu_context_get(submit->ctx->mmu); 537 submit->exec_state = args->exec_state; 538 submit->flags = args->flags; 539 540 ret = submit_lookup_objects(submit, file, bos, args->nr_bos); 541 if (ret) 542 goto err_submit_objects; 543 544 if ((priv->mmu_global->version != ETNAVIV_IOMMU_V2) && 545 !etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4, 546 relocs, args->nr_relocs)) { 547 ret = -EINVAL; 548 goto err_submit_objects; 549 } 550 551 if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) { 552 submit->in_fence = sync_file_get_fence(args->fence_fd); 553 if (!submit->in_fence) { 554 ret = -EINVAL; 555 goto err_submit_objects; 556 } 557 } 558 559 ret = submit_pin_objects(submit); 560 if (ret) 561 goto err_submit_objects; 562 563 ret = submit_reloc(submit, stream, args->stream_size / 4, 564 relocs, args->nr_relocs); 565 if (ret) 566 goto err_submit_objects; 567 568 ret = submit_perfmon_validate(submit, args->exec_state, pmrs); 569 if (ret) 570 goto err_submit_objects; 571 572 memcpy(submit->cmdbuf.vaddr, stream, args->stream_size); 573 574 ret = submit_lock_objects(submit, &ticket); 575 if (ret) 576 goto err_submit_objects; 577 578 ret = submit_fence_sync(submit); 579 if (ret) 580 goto err_submit_objects; 581 582 ret = etnaviv_sched_push_job(&ctx->sched_entity[args->pipe], submit); 583 if (ret) 584 goto err_submit_objects; 585 586 submit_attach_object_fences(submit); 587 588 if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) { 589 /* 590 * This can be improved: ideally we want to allocate the sync 591 * file before kicking off the GPU job and just attach the 592 * fence to the sync file here, eliminating the ENOMEM 593 * possibility at this stage. 594 */ 595 sync_file = sync_file_create(submit->out_fence); 596 if (!sync_file) { 597 ret = -ENOMEM; 598 goto err_submit_objects; 599 } 600 fd_install(out_fence_fd, sync_file->file); 601 } 602 603 args->fence_fd = out_fence_fd; 604 args->fence = submit->out_fence_id; 605 606 err_submit_objects: 607 etnaviv_submit_put(submit); 608 609 err_submit_ww_acquire: 610 ww_acquire_fini(&ticket); 611 612 err_submit_cmds: 613 if (ret && (out_fence_fd >= 0)) 614 put_unused_fd(out_fence_fd); 615 kvfree(stream); 616 kvfree(bos); 617 kvfree(relocs); 618 kvfree(pmrs); 619 620 return ret; 621 } 622