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