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