drivers/gpu/drm/msm/msm_gem_submit.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2013 Red Hat
   4  * Author: Rob Clark <[email protected]>
   5  */
   6
   7 #include <linux/file.h>
   8 #include <linux/sync_file.h>
   9 #include <linux/uaccess.h>
  10
  11 #include <drm/drm_drv.h>
  12 #include <drm/drm_file.h>
  13 #include <drm/drm_syncobj.h>
  14
  15 #include "msm_drv.h"
  16 #include "msm_gpu.h"
  17 #include "msm_gem.h"
  18 #include "msm_gpu_trace.h"
  19
  20 /*
  21  * Cmdstream submission:
  22  */
  23
  24 /* make sure these don't conflict w/ MSM_SUBMIT_BO_x */
  25 #define BO_VALID    0x8000   /* is current addr in cmdstream correct/valid? */
  26 #define BO_LOCKED   0x4000
  27 #define BO_PINNED   0x2000
  28
  29 static struct msm_gem_submit *submit_create(struct drm_device *dev,
  30                 struct msm_gpu *gpu,
  31                 struct msm_gpu_submitqueue *queue, uint32_t nr_bos,
  32                 uint32_t nr_cmds)
  33 {
  34         struct msm_gem_submit *submit;
  35         uint64_t sz = struct_size(submit, bos, nr_bos) +
  36                                   ((u64)nr_cmds * sizeof(submit->cmd[0]));
  37
  38         if (sz > SIZE_MAX)
  39                 return NULL;
  40
  41         submit = kmalloc(sz, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
  42         if (!submit)
  43                 return NULL;
  44
  45         kref_init(&submit->ref);
  46         submit->dev = dev;
  47         submit->aspace = queue->ctx->aspace;
  48         submit->gpu = gpu;
  49         submit->fence = NULL;
  50         submit->cmd = (void *)&submit->bos[nr_bos];
  51         submit->queue = queue;
  52         submit->ring = gpu->rb[queue->prio];
  53
  54         /* initially, until copy_from_user() and bo lookup succeeds: */
  55         submit->nr_bos = 0;
  56         submit->nr_cmds = 0;
  57
  58         INIT_LIST_HEAD(&submit->node);
  59         INIT_LIST_HEAD(&submit->bo_list);
  60
  61         return submit;
  62 }
  63
  64 void __msm_gem_submit_destroy(struct kref *kref)
  65 {
  66         struct msm_gem_submit *submit =
  67                         container_of(kref, struct msm_gem_submit, ref);
  68         unsigned i;
  69
  70         dma_fence_put(submit->fence);
  71         put_pid(submit->pid);
  72         msm_submitqueue_put(submit->queue);
  73
  74         for (i = 0; i < submit->nr_cmds; i++)
  75                 kfree(submit->cmd[i].relocs);
  76
  77         kfree(submit);
  78 }
  79
  80 static int submit_lookup_objects(struct msm_gem_submit *submit,
  81                 struct drm_msm_gem_submit *args, struct drm_file *file)
  82 {
  83         unsigned i;
  84         int ret = 0;
  85
  86         for (i = 0; i < args->nr_bos; i++) {
  87                 struct drm_msm_gem_submit_bo submit_bo;
  88                 void __user *userptr =
  89                         u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
  90
  91                 /* make sure we don't have garbage flags, in case we hit
  92                  * error path before flags is initialized:
  93                  */
  94                 submit->bos[i].flags = 0;
  95
  96                 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
  97                         ret = -EFAULT;
  98                         i = 0;
  99                         goto out;
 100                 }
 101
 102 /* at least one of READ and/or WRITE flags should be set: */
 103 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
 104
 105                 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
 106                         !(submit_bo.flags & MANDATORY_FLAGS)) {
 107                         DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
 108                         ret = -EINVAL;
 109                         i = 0;
 110                         goto out;
 111                 }
 112
 113                 submit->bos[i].handle = submit_bo.handle;
 114                 submit->bos[i].flags = submit_bo.flags;
 115                 /* in validate_objects() we figure out if this is true: */
 116                 submit->bos[i].iova  = submit_bo.presumed;
 117         }
 118
 119         spin_lock(&file->table_lock);
 120
 121         for (i = 0; i < args->nr_bos; i++) {
 122                 struct drm_gem_object *obj;
 123                 struct msm_gem_object *msm_obj;
 124
 125                 /* normally use drm_gem_object_lookup(), but for bulk lookup
 126                  * all under single table_lock just hit object_idr directly:
 127                  */
 128                 obj = idr_find(&file->object_idr, submit->bos[i].handle);
 129                 if (!obj) {
 130                         DRM_ERROR("invalid handle %u at index %u\n", submit->bos[i].handle, i);
 131                         ret = -EINVAL;
 132                         goto out_unlock;
 133                 }
 134
 135                 msm_obj = to_msm_bo(obj);
 136
 137                 if (!list_empty(&msm_obj->submit_entry)) {
 138                         DRM_ERROR("handle %u at index %u already on submit list\n",
 139                                         submit->bos[i].handle, i);
 140                         ret = -EINVAL;
 141                         goto out_unlock;
 142                 }
 143
 144                 drm_gem_object_get(obj);
 145
 146                 submit->bos[i].obj = msm_obj;
 147
 148                 list_add_tail(&msm_obj->submit_entry, &submit->bo_list);
 149         }
 150
 151 out_unlock:
 152         spin_unlock(&file->table_lock);
 153
 154 out:
 155         submit->nr_bos = i;
 156
 157         return ret;
 158 }
 159
 160 static int submit_lookup_cmds(struct msm_gem_submit *submit,
 161                 struct drm_msm_gem_submit *args, struct drm_file *file)
 162 {
 163         unsigned i, sz;
 164         int ret = 0;
 165
 166         for (i = 0; i < args->nr_cmds; i++) {
 167                 struct drm_msm_gem_submit_cmd submit_cmd;
 168                 void __user *userptr =
 169                         u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
 170
 171                 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
 172                 if (ret) {
 173                         ret = -EFAULT;
 174                         goto out;
 175                 }
 176
 177                 /* validate input from userspace: */
 178                 switch (submit_cmd.type) {
 179                 case MSM_SUBMIT_CMD_BUF:
 180                 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
 181                 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 182                         break;
 183                 default:
 184                         DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
 185                         return -EINVAL;
 186                 }
 187
 188                 if (submit_cmd.size % 4) {
 189                         DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
 190                                         submit_cmd.size);
 191                         ret = -EINVAL;
 192                         goto out;
 193                 }
 194
 195                 submit->cmd[i].type = submit_cmd.type;
 196                 submit->cmd[i].size = submit_cmd.size / 4;
 197                 submit->cmd[i].offset = submit_cmd.submit_offset / 4;
 198                 submit->cmd[i].idx  = submit_cmd.submit_idx;
 199                 submit->cmd[i].nr_relocs = submit_cmd.nr_relocs;
 200
 201                 sz = array_size(submit_cmd.nr_relocs,
 202                                 sizeof(struct drm_msm_gem_submit_reloc));
 203                 /* check for overflow: */
 204                 if (sz == SIZE_MAX) {
 205                         ret = -ENOMEM;
 206                         goto out;
 207                 }
 208                 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL);
 209                 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
 210                 if (ret) {
 211                         ret = -EFAULT;
 212                         goto out;
 213                 }
 214         }
 215
 216 out:
 217         return ret;
 218 }
 219
 220 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit,
 221                 int i, bool backoff)
 222 {
 223         struct msm_gem_object *msm_obj = submit->bos[i].obj;
 224
 225         if (submit->bos[i].flags & BO_PINNED)
 226                 msm_gem_unpin_iova_locked(&msm_obj->base, submit->aspace);
 227
 228         if (submit->bos[i].flags & BO_LOCKED)
 229                 dma_resv_unlock(msm_obj->base.resv);
 230
 231         if (backoff && !(submit->bos[i].flags & BO_VALID))
 232                 submit->bos[i].iova = 0;
 233
 234         submit->bos[i].flags &= ~(BO_LOCKED | BO_PINNED);
 235 }
 236
 237 /* This is where we make sure all the bo's are reserved and pin'd: */
 238 static int submit_lock_objects(struct msm_gem_submit *submit)
 239 {
 240         int contended, slow_locked = -1, i, ret = 0;
 241
 242 retry:
 243         for (i = 0; i < submit->nr_bos; i++) {
 244                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 245
 246                 if (slow_locked == i)
 247                         slow_locked = -1;
 248
 249                 contended = i;
 250
 251                 if (!(submit->bos[i].flags & BO_LOCKED)) {
 252                         ret = dma_resv_lock_interruptible(msm_obj->base.resv,
 253                                                           &submit->ticket);
 254                         if (ret)
 255                                 goto fail;
 256                         submit->bos[i].flags |= BO_LOCKED;
 257                 }
 258         }
 259
 260         ww_acquire_done(&submit->ticket);
 261
 262         return 0;
 263
 264 fail:
 265         for (; i >= 0; i--)
 266                 submit_unlock_unpin_bo(submit, i, true);
 267
 268         if (slow_locked > 0)
 269                 submit_unlock_unpin_bo(submit, slow_locked, true);
 270
 271         if (ret == -EDEADLK) {
 272                 struct msm_gem_object *msm_obj = submit->bos[contended].obj;
 273                 /* we lost out in a seqno race, lock and retry.. */
 274                 ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
 275                                                        &submit->ticket);
 276                 if (!ret) {
 277                         submit->bos[contended].flags |= BO_LOCKED;
 278                         slow_locked = contended;
 279                         goto retry;
 280                 }
 281         }
 282
 283         return ret;
 284 }
 285
 286 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
 287 {
 288         int i, ret = 0;
 289
 290         for (i = 0; i < submit->nr_bos; i++) {
 291                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 292                 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
 293
 294                 if (!write) {
 295                         /* NOTE: _reserve_shared() must happen before
 296                          * _add_shared_fence(), which makes this a slightly
 297                          * strange place to call it.  OTOH this is a
 298                          * convenient can-fail point to hook it in.
 299                          */
 300                         ret = dma_resv_reserve_shared(msm_obj->base.resv,
 301                                                                 1);
 302                         if (ret)
 303                                 return ret;
 304                 }
 305
 306                 if (no_implicit)
 307                         continue;
 308
 309                 ret = msm_gem_sync_object(&msm_obj->base, submit->ring->fctx,
 310                         write);
 311                 if (ret)
 312                         break;
 313         }
 314
 315         return ret;
 316 }
 317
 318 static int submit_pin_objects(struct msm_gem_submit *submit)
 319 {
 320         int i, ret = 0;
 321
 322         submit->valid = true;
 323
 324         for (i = 0; i < submit->nr_bos; i++) {
 325                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 326                 uint64_t iova;
 327
 328                 /* if locking succeeded, pin bo: */
 329                 ret = msm_gem_get_and_pin_iova_locked(&msm_obj->base,
 330                                 submit->aspace, &iova);
 331
 332                 if (ret)
 333                         break;
 334
 335                 submit->bos[i].flags |= BO_PINNED;
 336
 337                 if (iova == submit->bos[i].iova) {
 338                         submit->bos[i].flags |= BO_VALID;
 339                 } else {
 340                         submit->bos[i].iova = iova;
 341                         /* iova changed, so address in cmdstream is not valid: */
 342                         submit->bos[i].flags &= ~BO_VALID;
 343                         submit->valid = false;
 344                 }
 345         }
 346
 347         return ret;
 348 }
 349
 350 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
 351                 struct msm_gem_object **obj, uint64_t *iova, bool *valid)
 352 {
 353         if (idx >= submit->nr_bos) {
 354                 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
 355                                 idx, submit->nr_bos);
 356                 return -EINVAL;
 357         }
 358
 359         if (obj)
 360                 *obj = submit->bos[idx].obj;
 361         if (iova)
 362                 *iova = submit->bos[idx].iova;
 363         if (valid)
 364                 *valid = !!(submit->bos[idx].flags & BO_VALID);
 365
 366         return 0;
 367 }
 368
 369 /* process the reloc's and patch up the cmdstream as needed: */
 370 static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
 371                 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs)
 372 {
 373         uint32_t i, last_offset = 0;
 374         uint32_t *ptr;
 375         int ret = 0;
 376
 377         if (!nr_relocs)
 378                 return 0;
 379
 380         if (offset % 4) {
 381                 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
 382                 return -EINVAL;
 383         }
 384
 385         /* For now, just map the entire thing.  Eventually we probably
 386          * to do it page-by-page, w/ kmap() if not vmap()d..
 387          */
 388         ptr = msm_gem_get_vaddr_locked(&obj->base);
 389
 390         if (IS_ERR(ptr)) {
 391                 ret = PTR_ERR(ptr);
 392                 DBG("failed to map: %d", ret);
 393                 return ret;
 394         }
 395
 396         for (i = 0; i < nr_relocs; i++) {
 397                 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i];
 398                 uint32_t off;
 399                 uint64_t iova;
 400                 bool valid;
 401
 402                 if (submit_reloc.submit_offset % 4) {
 403                         DRM_ERROR("non-aligned reloc offset: %u\n",
 404                                         submit_reloc.submit_offset);
 405                         ret = -EINVAL;
 406                         goto out;
 407                 }
 408
 409                 /* offset in dwords: */
 410                 off = submit_reloc.submit_offset / 4;
 411
 412                 if ((off >= (obj->base.size / 4)) ||
 413                                 (off < last_offset)) {
 414                         DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
 415                         ret = -EINVAL;
 416                         goto out;
 417                 }
 418
 419                 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
 420                 if (ret)
 421                         goto out;
 422
 423                 if (valid)
 424                         continue;
 425
 426                 iova += submit_reloc.reloc_offset;
 427
 428                 if (submit_reloc.shift < 0)
 429                         iova >>= -submit_reloc.shift;
 430                 else
 431                         iova <<= submit_reloc.shift;
 432
 433                 ptr[off] = iova | submit_reloc.or;
 434
 435                 last_offset = off;
 436         }
 437
 438 out:
 439         msm_gem_put_vaddr_locked(&obj->base);
 440
 441         return ret;
 442 }
 443
 444 static void submit_cleanup(struct msm_gem_submit *submit)
 445 {
 446         unsigned i;
 447
 448         for (i = 0; i < submit->nr_bos; i++) {
 449                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 450                 submit_unlock_unpin_bo(submit, i, false);
 451                 list_del_init(&msm_obj->submit_entry);
 452                 drm_gem_object_put_locked(&msm_obj->base);
 453         }
 454 }
 455
 456
 457 struct msm_submit_post_dep {
 458         struct drm_syncobj *syncobj;
 459         uint64_t point;
 460         struct dma_fence_chain *chain;
 461 };
 462
 463 static struct drm_syncobj **msm_wait_deps(struct drm_device *dev,
 464                                           struct drm_file *file,
 465                                           uint64_t in_syncobjs_addr,
 466                                           uint32_t nr_in_syncobjs,
 467                                           size_t syncobj_stride,
 468                                           struct msm_ringbuffer *ring)
 469 {
 470         struct drm_syncobj **syncobjs = NULL;
 471         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 472         int ret = 0;
 473         uint32_t i, j;
 474
 475         syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
 476                            GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 477         if (!syncobjs)
 478                 return ERR_PTR(-ENOMEM);
 479
 480         for (i = 0; i < nr_in_syncobjs; ++i) {
 481                 uint64_t address = in_syncobjs_addr + i * syncobj_stride;
 482                 struct dma_fence *fence;
 483
 484                 if (copy_from_user(&syncobj_desc,
 485                                    u64_to_user_ptr(address),
 486                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 487                         ret = -EFAULT;
 488                         break;
 489                 }
 490
 491                 if (syncobj_desc.point &&
 492                     !drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) {
 493                         ret = -EOPNOTSUPP;
 494                         break;
 495                 }
 496
 497                 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
 498                         ret = -EINVAL;
 499                         break;
 500                 }
 501
 502                 ret = drm_syncobj_find_fence(file, syncobj_desc.handle,
 503                                              syncobj_desc.point, 0, &fence);
 504                 if (ret)
 505                         break;
 506
 507                 if (!dma_fence_match_context(fence, ring->fctx->context))
 508                         ret = dma_fence_wait(fence, true);
 509
 510                 dma_fence_put(fence);
 511                 if (ret)
 512                         break;
 513
 514                 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
 515                         syncobjs[i] =
 516                                 drm_syncobj_find(file, syncobj_desc.handle);
 517                         if (!syncobjs[i]) {
 518                                 ret = -EINVAL;
 519                                 break;
 520                         }
 521                 }
 522         }
 523
 524         if (ret) {
 525                 for (j = 0; j <= i; ++j) {
 526                         if (syncobjs[j])
 527                                 drm_syncobj_put(syncobjs[j]);
 528                 }
 529                 kfree(syncobjs);
 530                 return ERR_PTR(ret);
 531         }
 532         return syncobjs;
 533 }
 534
 535 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
 536                                uint32_t nr_syncobjs)
 537 {
 538         uint32_t i;
 539
 540         for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
 541                 if (syncobjs[i])
 542                         drm_syncobj_replace_fence(syncobjs[i], NULL);
 543         }
 544 }
 545
 546 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
 547                                                        struct drm_file *file,
 548                                                        uint64_t syncobjs_addr,
 549                                                        uint32_t nr_syncobjs,
 550                                                        size_t syncobj_stride)
 551 {
 552         struct msm_submit_post_dep *post_deps;
 553         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 554         int ret = 0;
 555         uint32_t i, j;
 556
 557         post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps),
 558                                   GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 559         if (!post_deps)
 560                 return ERR_PTR(-ENOMEM);
 561
 562         for (i = 0; i < nr_syncobjs; ++i) {
 563                 uint64_t address = syncobjs_addr + i * syncobj_stride;
 564
 565                 if (copy_from_user(&syncobj_desc,
 566                                    u64_to_user_ptr(address),
 567                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 568                         ret = -EFAULT;
 569                         break;
 570                 }
 571
 572                 post_deps[i].point = syncobj_desc.point;
 573                 post_deps[i].chain = NULL;
 574
 575                 if (syncobj_desc.flags) {
 576                         ret = -EINVAL;
 577                         break;
 578                 }
 579
 580                 if (syncobj_desc.point) {
 581                         if (!drm_core_check_feature(dev,
 582                                                     DRIVER_SYNCOBJ_TIMELINE)) {
 583                                 ret = -EOPNOTSUPP;
 584                                 break;
 585                         }
 586
 587                         post_deps[i].chain =
 588                                 kmalloc(sizeof(*post_deps[i].chain),
 589                                         GFP_KERNEL);
 590                         if (!post_deps[i].chain) {
 591                                 ret = -ENOMEM;
 592                                 break;
 593                         }
 594                 }
 595
 596                 post_deps[i].syncobj =
 597                         drm_syncobj_find(file, syncobj_desc.handle);
 598                 if (!post_deps[i].syncobj) {
 599                         ret = -EINVAL;
 600                         break;
 601                 }
 602         }
 603
 604         if (ret) {
 605                 for (j = 0; j <= i; ++j) {
 606                         kfree(post_deps[j].chain);
 607                         if (post_deps[j].syncobj)
 608                                 drm_syncobj_put(post_deps[j].syncobj);
 609                 }
 610
 611                 kfree(post_deps);
 612                 return ERR_PTR(ret);
 613         }
 614
 615         return post_deps;
 616 }
 617
 618 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
 619                                   uint32_t count, struct dma_fence *fence)
 620 {
 621         uint32_t i;
 622
 623         for (i = 0; post_deps && i < count; ++i) {
 624                 if (post_deps[i].chain) {
 625                         drm_syncobj_add_point(post_deps[i].syncobj,
 626                                               post_deps[i].chain,
 627                                               fence, post_deps[i].point);
 628                         post_deps[i].chain = NULL;
 629                 } else {
 630                         drm_syncobj_replace_fence(post_deps[i].syncobj,
 631                                                   fence);
 632                 }
 633         }
 634 }
 635
 636 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 637                 struct drm_file *file)
 638 {
 639         static atomic_t ident = ATOMIC_INIT(0);
 640         struct msm_drm_private *priv = dev->dev_private;
 641         struct drm_msm_gem_submit *args = data;
 642         struct msm_file_private *ctx = file->driver_priv;
 643         struct msm_gem_submit *submit;
 644         struct msm_gpu *gpu = priv->gpu;
 645         struct sync_file *sync_file = NULL;
 646         struct msm_gpu_submitqueue *queue;
 647         struct msm_ringbuffer *ring;
 648         struct msm_submit_post_dep *post_deps = NULL;
 649         struct drm_syncobj **syncobjs_to_reset = NULL;
 650         int out_fence_fd = -1;
 651         struct pid *pid = get_pid(task_pid(current));
 652         bool has_ww_ticket = false;
 653         unsigned i;
 654         int ret, submitid;
 655         if (!gpu)
 656                 return -ENXIO;
 657
 658         if (args->pad)
 659                 return -EINVAL;
 660
 661         /* for now, we just have 3d pipe.. eventually this would need to
 662          * be more clever to dispatch to appropriate gpu module:
 663          */
 664         if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
 665                 return -EINVAL;
 666
 667         if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
 668                 return -EINVAL;
 669
 670         if (args->flags & MSM_SUBMIT_SUDO) {
 671                 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
 672                     !capable(CAP_SYS_RAWIO))
 673                         return -EINVAL;
 674         }
 675
 676         queue = msm_submitqueue_get(ctx, args->queueid);
 677         if (!queue)
 678                 return -ENOENT;
 679
 680         /* Get a unique identifier for the submission for logging purposes */
 681         submitid = atomic_inc_return(&ident) - 1;
 682
 683         ring = gpu->rb[queue->prio];
 684         trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid,
 685                 args->nr_bos, args->nr_cmds);
 686
 687         if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
 688                 struct dma_fence *in_fence;
 689
 690                 in_fence = sync_file_get_fence(args->fence_fd);
 691
 692                 if (!in_fence)
 693                         return -EINVAL;
 694
 695                 /*
 696                  * Wait if the fence is from a foreign context, or if the fence
 697                  * array contains any fence from a foreign context.
 698                  */
 699                 ret = 0;
 700                 if (!dma_fence_match_context(in_fence, ring->fctx->context))
 701                         ret = dma_fence_wait(in_fence, true);
 702
 703                 dma_fence_put(in_fence);
 704                 if (ret)
 705                         return ret;
 706         }
 707
 708         if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
 709                 syncobjs_to_reset = msm_wait_deps(dev, file,
 710                                                   args->in_syncobjs,
 711                                                   args->nr_in_syncobjs,
 712                                                   args->syncobj_stride, ring);
 713                 if (IS_ERR(syncobjs_to_reset))
 714                         return PTR_ERR(syncobjs_to_reset);
 715         }
 716
 717         if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
 718                 post_deps = msm_parse_post_deps(dev, file,
 719                                                 args->out_syncobjs,
 720                                                 args->nr_out_syncobjs,
 721                                                 args->syncobj_stride);
 722                 if (IS_ERR(post_deps)) {
 723                         ret = PTR_ERR(post_deps);
 724                         goto out_post_unlock;
 725                 }
 726         }
 727
 728         ret = mutex_lock_interruptible(&dev->struct_mutex);
 729         if (ret)
 730                 goto out_post_unlock;
 731
 732         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 733                 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
 734                 if (out_fence_fd < 0) {
 735                         ret = out_fence_fd;
 736                         goto out_unlock;
 737                 }
 738         }
 739
 740         submit = submit_create(dev, gpu, queue, args->nr_bos,
 741                 args->nr_cmds);
 742         if (!submit) {
 743                 ret = -ENOMEM;
 744                 goto out_unlock;
 745         }
 746
 747         submit->pid = pid;
 748         submit->ident = submitid;
 749
 750         if (args->flags & MSM_SUBMIT_SUDO)
 751                 submit->in_rb = true;
 752
 753         ret = submit_lookup_objects(submit, args, file);
 754         if (ret)
 755                 goto out_pre_pm;
 756
 757         ret = submit_lookup_cmds(submit, args, file);
 758         if (ret)
 759                 goto out_pre_pm;
 760
 761         /*
 762          * Thanks to dev_pm_opp opp_table_lock interactions with mm->mmap_sem
 763          * in the resume path, we need to to rpm get before we lock objs.
 764          * Which unfortunately might involve powering up the GPU sooner than
 765          * is necessary.  But at least in the explicit fencing case, we will
 766          * have already done all the fence waiting.
 767          */
 768         pm_runtime_get_sync(&gpu->pdev->dev);
 769
 770         /* copy_*_user while holding a ww ticket upsets lockdep */
 771         ww_acquire_init(&submit->ticket, &reservation_ww_class);
 772         has_ww_ticket = true;
 773         ret = submit_lock_objects(submit);
 774         if (ret)
 775                 goto out;
 776
 777         ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
 778         if (ret)
 779                 goto out;
 780
 781         ret = submit_pin_objects(submit);
 782         if (ret)
 783                 goto out;
 784
 785         for (i = 0; i < args->nr_cmds; i++) {
 786                 struct msm_gem_object *msm_obj;
 787                 uint64_t iova;
 788
 789                 ret = submit_bo(submit, submit->cmd[i].idx,
 790                                 &msm_obj, &iova, NULL);
 791                 if (ret)
 792                         goto out;
 793
 794                 if (!submit->cmd[i].size ||
 795                         ((submit->cmd[i].size + submit->cmd[i].offset) >
 796                                 msm_obj->base.size / 4)) {
 797                         DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4);
 798                         ret = -EINVAL;
 799                         goto out;
 800                 }
 801
 802                 submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4);
 803
 804                 if (submit->valid)
 805                         continue;
 806
 807                 ret = submit_reloc(submit, msm_obj, submit->cmd[i].offset * 4,
 808                                 submit->cmd[i].nr_relocs, submit->cmd[i].relocs);
 809                 if (ret)
 810                         goto out;
 811         }
 812
 813         submit->nr_cmds = i;
 814
 815         submit->fence = msm_fence_alloc(ring->fctx);
 816         if (IS_ERR(submit->fence)) {
 817                 ret = PTR_ERR(submit->fence);
 818                 submit->fence = NULL;
 819                 goto out;
 820         }
 821
 822         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 823                 sync_file = sync_file_create(submit->fence);
 824                 if (!sync_file) {
 825                         ret = -ENOMEM;
 826                         goto out;
 827                 }
 828         }
 829
 830         msm_gpu_submit(gpu, submit);
 831
 832         args->fence = submit->fence->seqno;
 833
 834         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 835                 fd_install(out_fence_fd, sync_file->file);
 836                 args->fence_fd = out_fence_fd;
 837         }
 838
 839         msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
 840         msm_process_post_deps(post_deps, args->nr_out_syncobjs,
 841                               submit->fence);
 842
 843
 844 out:
 845         pm_runtime_put(&gpu->pdev->dev);
 846 out_pre_pm:
 847         submit_cleanup(submit);
 848         if (has_ww_ticket)
 849                 ww_acquire_fini(&submit->ticket);
 850         msm_gem_submit_put(submit);
 851 out_unlock:
 852         if (ret && (out_fence_fd >= 0))
 853                 put_unused_fd(out_fence_fd);
 854         mutex_unlock(&dev->struct_mutex);
 855
 856 out_post_unlock:
 857         if (!IS_ERR_OR_NULL(post_deps)) {
 858                 for (i = 0; i < args->nr_out_syncobjs; ++i) {
 859                         kfree(post_deps[i].chain);
 860                         drm_syncobj_put(post_deps[i].syncobj);
 861                 }
 862                 kfree(post_deps);
 863         }
 864
 865         if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
 866                 for (i = 0; i < args->nr_in_syncobjs; ++i) {
 867                         if (syncobjs_to_reset[i])
 868                                 drm_syncobj_put(syncobjs_to_reset[i]);
 869                 }
 870                 kfree(syncobjs_to_reset);
 871         }
 872
 873         return ret;
 874 }