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