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 <robdclark@gmail.com>
   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         submit->fault_dumped = false;
  54
  55         /* initially, until copy_from_user() and bo lookup succeeds: */
  56         submit->nr_bos = 0;
  57         submit->nr_cmds = 0;
  58
  59         INIT_LIST_HEAD(&submit->node);
  60         INIT_LIST_HEAD(&submit->bo_list);
  61
  62         return submit;
  63 }
  64
  65 void __msm_gem_submit_destroy(struct kref *kref)
  66 {
  67         struct msm_gem_submit *submit =
  68                         container_of(kref, struct msm_gem_submit, ref);
  69         unsigned i;
  70
  71         dma_fence_put(submit->fence);
  72         put_pid(submit->pid);
  73         msm_submitqueue_put(submit->queue);
  74
  75         for (i = 0; i < submit->nr_cmds; i++)
  76                 kfree(submit->cmd[i].relocs);
  77
  78         kfree(submit);
  79 }
  80
  81 static int submit_lookup_objects(struct msm_gem_submit *submit,
  82                 struct drm_msm_gem_submit *args, struct drm_file *file)
  83 {
  84         unsigned i;
  85         int ret = 0;
  86
  87         for (i = 0; i < args->nr_bos; i++) {
  88                 struct drm_msm_gem_submit_bo submit_bo;
  89                 void __user *userptr =
  90                         u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
  91
  92                 /* make sure we don't have garbage flags, in case we hit
  93                  * error path before flags is initialized:
  94                  */
  95                 submit->bos[i].flags = 0;
  96
  97                 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
  98                         ret = -EFAULT;
  99                         i = 0;
 100                         goto out;
 101                 }
 102
 103 /* at least one of READ and/or WRITE flags should be set: */
 104 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
 105
 106                 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
 107                         !(submit_bo.flags & MANDATORY_FLAGS)) {
 108                         DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
 109                         ret = -EINVAL;
 110                         i = 0;
 111                         goto out;
 112                 }
 113
 114                 submit->bos[i].handle = submit_bo.handle;
 115                 submit->bos[i].flags = submit_bo.flags;
 116                 /* in validate_objects() we figure out if this is true: */
 117                 submit->bos[i].iova  = submit_bo.presumed;
 118         }
 119
 120         spin_lock(&file->table_lock);
 121
 122         for (i = 0; i < args->nr_bos; i++) {
 123                 struct drm_gem_object *obj;
 124                 struct msm_gem_object *msm_obj;
 125
 126                 /* normally use drm_gem_object_lookup(), but for bulk lookup
 127                  * all under single table_lock just hit object_idr directly:
 128                  */
 129                 obj = idr_find(&file->object_idr, submit->bos[i].handle);
 130                 if (!obj) {
 131                         DRM_ERROR("invalid handle %u at index %u\n", submit->bos[i].handle, i);
 132                         ret = -EINVAL;
 133                         goto out_unlock;
 134                 }
 135
 136                 msm_obj = to_msm_bo(obj);
 137
 138                 if (!list_empty(&msm_obj->submit_entry)) {
 139                         DRM_ERROR("handle %u at index %u already on submit list\n",
 140                                         submit->bos[i].handle, i);
 141                         ret = -EINVAL;
 142                         goto out_unlock;
 143                 }
 144
 145                 drm_gem_object_get(obj);
 146
 147                 submit->bos[i].obj = msm_obj;
 148
 149                 list_add_tail(&msm_obj->submit_entry, &submit->bo_list);
 150         }
 151
 152 out_unlock:
 153         spin_unlock(&file->table_lock);
 154
 155 out:
 156         submit->nr_bos = i;
 157
 158         return ret;
 159 }
 160
 161 static int submit_lookup_cmds(struct msm_gem_submit *submit,
 162                 struct drm_msm_gem_submit *args, struct drm_file *file)
 163 {
 164         unsigned i, sz;
 165         int ret = 0;
 166
 167         for (i = 0; i < args->nr_cmds; i++) {
 168                 struct drm_msm_gem_submit_cmd submit_cmd;
 169                 void __user *userptr =
 170                         u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
 171
 172                 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
 173                 if (ret) {
 174                         ret = -EFAULT;
 175                         goto out;
 176                 }
 177
 178                 /* validate input from userspace: */
 179                 switch (submit_cmd.type) {
 180                 case MSM_SUBMIT_CMD_BUF:
 181                 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
 182                 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 183                         break;
 184                 default:
 185                         DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
 186                         return -EINVAL;
 187                 }
 188
 189                 if (submit_cmd.size % 4) {
 190                         DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
 191                                         submit_cmd.size);
 192                         ret = -EINVAL;
 193                         goto out;
 194                 }
 195
 196                 submit->cmd[i].type = submit_cmd.type;
 197                 submit->cmd[i].size = submit_cmd.size / 4;
 198                 submit->cmd[i].offset = submit_cmd.submit_offset / 4;
 199                 submit->cmd[i].idx  = submit_cmd.submit_idx;
 200                 submit->cmd[i].nr_relocs = submit_cmd.nr_relocs;
 201
 202                 userptr = u64_to_user_ptr(submit_cmd.relocs);
 203
 204                 sz = array_size(submit_cmd.nr_relocs,
 205                                 sizeof(struct drm_msm_gem_submit_reloc));
 206                 /* check for overflow: */
 207                 if (sz == SIZE_MAX) {
 208                         ret = -ENOMEM;
 209                         goto out;
 210                 }
 211                 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL);
 212                 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
 213                 if (ret) {
 214                         ret = -EFAULT;
 215                         goto out;
 216                 }
 217         }
 218
 219 out:
 220         return ret;
 221 }
 222
 223 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit,
 224                 int i, bool backoff)
 225 {
 226         struct msm_gem_object *msm_obj = submit->bos[i].obj;
 227
 228         if (submit->bos[i].flags & BO_PINNED)
 229                 msm_gem_unpin_iova_locked(&msm_obj->base, submit->aspace);
 230
 231         if (submit->bos[i].flags & BO_LOCKED)
 232                 dma_resv_unlock(msm_obj->base.resv);
 233
 234         if (backoff && !(submit->bos[i].flags & BO_VALID))
 235                 submit->bos[i].iova = 0;
 236
 237         submit->bos[i].flags &= ~(BO_LOCKED | BO_PINNED);
 238 }
 239
 240 /* This is where we make sure all the bo's are reserved and pin'd: */
 241 static int submit_lock_objects(struct msm_gem_submit *submit)
 242 {
 243         int contended, slow_locked = -1, i, ret = 0;
 244
 245 retry:
 246         for (i = 0; i < submit->nr_bos; i++) {
 247                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 248
 249                 if (slow_locked == i)
 250                         slow_locked = -1;
 251
 252                 contended = i;
 253
 254                 if (!(submit->bos[i].flags & BO_LOCKED)) {
 255                         ret = dma_resv_lock_interruptible(msm_obj->base.resv,
 256                                                           &submit->ticket);
 257                         if (ret)
 258                                 goto fail;
 259                         submit->bos[i].flags |= BO_LOCKED;
 260                 }
 261         }
 262
 263         ww_acquire_done(&submit->ticket);
 264
 265         return 0;
 266
 267 fail:
 268         for (; i >= 0; i--)
 269                 submit_unlock_unpin_bo(submit, i, true);
 270
 271         if (slow_locked > 0)
 272                 submit_unlock_unpin_bo(submit, slow_locked, true);
 273
 274         if (ret == -EDEADLK) {
 275                 struct msm_gem_object *msm_obj = submit->bos[contended].obj;
 276                 /* we lost out in a seqno race, lock and retry.. */
 277                 ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
 278                                                        &submit->ticket);
 279                 if (!ret) {
 280                         submit->bos[contended].flags |= BO_LOCKED;
 281                         slow_locked = contended;
 282                         goto retry;
 283                 }
 284         }
 285
 286         return ret;
 287 }
 288
 289 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
 290 {
 291         int i, ret = 0;
 292
 293         for (i = 0; i < submit->nr_bos; i++) {
 294                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 295                 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
 296
 297                 if (!write) {
 298                         /* NOTE: _reserve_shared() must happen before
 299                          * _add_shared_fence(), which makes this a slightly
 300                          * strange place to call it.  OTOH this is a
 301                          * convenient can-fail point to hook it in.
 302                          */
 303                         ret = dma_resv_reserve_shared(msm_obj->base.resv,
 304                                                                 1);
 305                         if (ret)
 306                                 return ret;
 307                 }
 308
 309                 if (no_implicit)
 310                         continue;
 311
 312                 ret = msm_gem_sync_object(&msm_obj->base, submit->ring->fctx,
 313                         write);
 314                 if (ret)
 315                         break;
 316         }
 317
 318         return ret;
 319 }
 320
 321 static int submit_pin_objects(struct msm_gem_submit *submit)
 322 {
 323         int i, ret = 0;
 324
 325         submit->valid = true;
 326
 327         for (i = 0; i < submit->nr_bos; i++) {
 328                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 329                 uint64_t iova;
 330
 331                 /* if locking succeeded, pin bo: */
 332                 ret = msm_gem_get_and_pin_iova_locked(&msm_obj->base,
 333                                 submit->aspace, &iova);
 334
 335                 if (ret)
 336                         break;
 337
 338                 submit->bos[i].flags |= BO_PINNED;
 339
 340                 if (iova == submit->bos[i].iova) {
 341                         submit->bos[i].flags |= BO_VALID;
 342                 } else {
 343                         submit->bos[i].iova = iova;
 344                         /* iova changed, so address in cmdstream is not valid: */
 345                         submit->bos[i].flags &= ~BO_VALID;
 346                         submit->valid = false;
 347                 }
 348         }
 349
 350         return ret;
 351 }
 352
 353 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
 354                 struct msm_gem_object **obj, uint64_t *iova, bool *valid)
 355 {
 356         if (idx >= submit->nr_bos) {
 357                 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
 358                                 idx, submit->nr_bos);
 359                 return -EINVAL;
 360         }
 361
 362         if (obj)
 363                 *obj = submit->bos[idx].obj;
 364         if (iova)
 365                 *iova = submit->bos[idx].iova;
 366         if (valid)
 367                 *valid = !!(submit->bos[idx].flags & BO_VALID);
 368
 369         return 0;
 370 }
 371
 372 /* process the reloc's and patch up the cmdstream as needed: */
 373 static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
 374                 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs)
 375 {
 376         uint32_t i, last_offset = 0;
 377         uint32_t *ptr;
 378         int ret = 0;
 379
 380         if (!nr_relocs)
 381                 return 0;
 382
 383         if (offset % 4) {
 384                 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
 385                 return -EINVAL;
 386         }
 387
 388         /* For now, just map the entire thing.  Eventually we probably
 389          * to do it page-by-page, w/ kmap() if not vmap()d..
 390          */
 391         ptr = msm_gem_get_vaddr_locked(&obj->base);
 392
 393         if (IS_ERR(ptr)) {
 394                 ret = PTR_ERR(ptr);
 395                 DBG("failed to map: %d", ret);
 396                 return ret;
 397         }
 398
 399         for (i = 0; i < nr_relocs; i++) {
 400                 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i];
 401                 uint32_t off;
 402                 uint64_t iova;
 403                 bool valid;
 404
 405                 if (submit_reloc.submit_offset % 4) {
 406                         DRM_ERROR("non-aligned reloc offset: %u\n",
 407                                         submit_reloc.submit_offset);
 408                         ret = -EINVAL;
 409                         goto out;
 410                 }
 411
 412                 /* offset in dwords: */
 413                 off = submit_reloc.submit_offset / 4;
 414
 415                 if ((off >= (obj->base.size / 4)) ||
 416                                 (off < last_offset)) {
 417                         DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
 418                         ret = -EINVAL;
 419                         goto out;
 420                 }
 421
 422                 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
 423                 if (ret)
 424                         goto out;
 425
 426                 if (valid)
 427                         continue;
 428
 429                 iova += submit_reloc.reloc_offset;
 430
 431                 if (submit_reloc.shift < 0)
 432                         iova >>= -submit_reloc.shift;
 433                 else
 434                         iova <<= submit_reloc.shift;
 435
 436                 ptr[off] = iova | submit_reloc.or;
 437
 438                 last_offset = off;
 439         }
 440
 441 out:
 442         msm_gem_put_vaddr_locked(&obj->base);
 443
 444         return ret;
 445 }
 446
 447 static void submit_cleanup(struct msm_gem_submit *submit)
 448 {
 449         unsigned i;
 450
 451         for (i = 0; i < submit->nr_bos; i++) {
 452                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 453                 submit_unlock_unpin_bo(submit, i, false);
 454                 list_del_init(&msm_obj->submit_entry);
 455                 drm_gem_object_put_locked(&msm_obj->base);
 456         }
 457 }
 458
 459
 460 struct msm_submit_post_dep {
 461         struct drm_syncobj *syncobj;
 462         uint64_t point;
 463         struct dma_fence_chain *chain;
 464 };
 465
 466 static struct drm_syncobj **msm_wait_deps(struct drm_device *dev,
 467                                           struct drm_file *file,
 468                                           uint64_t in_syncobjs_addr,
 469                                           uint32_t nr_in_syncobjs,
 470                                           size_t syncobj_stride,
 471                                           struct msm_ringbuffer *ring)
 472 {
 473         struct drm_syncobj **syncobjs = NULL;
 474         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 475         int ret = 0;
 476         uint32_t i, j;
 477
 478         syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
 479                            GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 480         if (!syncobjs)
 481                 return ERR_PTR(-ENOMEM);
 482
 483         for (i = 0; i < nr_in_syncobjs; ++i) {
 484                 uint64_t address = in_syncobjs_addr + i * syncobj_stride;
 485                 struct dma_fence *fence;
 486
 487                 if (copy_from_user(&syncobj_desc,
 488                                    u64_to_user_ptr(address),
 489                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 490                         ret = -EFAULT;
 491                         break;
 492                 }
 493
 494                 if (syncobj_desc.point &&
 495                     !drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) {
 496                         ret = -EOPNOTSUPP;
 497                         break;
 498                 }
 499
 500                 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
 501                         ret = -EINVAL;
 502                         break;
 503                 }
 504
 505                 ret = drm_syncobj_find_fence(file, syncobj_desc.handle,
 506                                              syncobj_desc.point, 0, &fence);
 507                 if (ret)
 508                         break;
 509
 510                 if (!dma_fence_match_context(fence, ring->fctx->context))
 511                         ret = dma_fence_wait(fence, true);
 512
 513                 dma_fence_put(fence);
 514                 if (ret)
 515                         break;
 516
 517                 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
 518                         syncobjs[i] =
 519                                 drm_syncobj_find(file, syncobj_desc.handle);
 520                         if (!syncobjs[i]) {
 521                                 ret = -EINVAL;
 522                                 break;
 523                         }
 524                 }
 525         }
 526
 527         if (ret) {
 528                 for (j = 0; j <= i; ++j) {
 529                         if (syncobjs[j])
 530                                 drm_syncobj_put(syncobjs[j]);
 531                 }
 532                 kfree(syncobjs);
 533                 return ERR_PTR(ret);
 534         }
 535         return syncobjs;
 536 }
 537
 538 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
 539                                uint32_t nr_syncobjs)
 540 {
 541         uint32_t i;
 542
 543         for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
 544                 if (syncobjs[i])
 545                         drm_syncobj_replace_fence(syncobjs[i], NULL);
 546         }
 547 }
 548
 549 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
 550                                                        struct drm_file *file,
 551                                                        uint64_t syncobjs_addr,
 552                                                        uint32_t nr_syncobjs,
 553                                                        size_t syncobj_stride)
 554 {
 555         struct msm_submit_post_dep *post_deps;
 556         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 557         int ret = 0;
 558         uint32_t i, j;
 559
 560         post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps),
 561                                   GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 562         if (!post_deps)
 563                 return ERR_PTR(-ENOMEM);
 564
 565         for (i = 0; i < nr_syncobjs; ++i) {
 566                 uint64_t address = syncobjs_addr + i * syncobj_stride;
 567
 568                 if (copy_from_user(&syncobj_desc,
 569                                    u64_to_user_ptr(address),
 570                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 571                         ret = -EFAULT;
 572                         break;
 573                 }
 574
 575                 post_deps[i].point = syncobj_desc.point;
 576                 post_deps[i].chain = NULL;
 577
 578                 if (syncobj_desc.flags) {
 579                         ret = -EINVAL;
 580                         break;
 581                 }
 582
 583                 if (syncobj_desc.point) {
 584                         if (!drm_core_check_feature(dev,
 585                                                     DRIVER_SYNCOBJ_TIMELINE)) {
 586                                 ret = -EOPNOTSUPP;
 587                                 break;
 588                         }
 589
 590                         post_deps[i].chain = dma_fence_chain_alloc();
 591                         if (!post_deps[i].chain) {
 592                                 ret = -ENOMEM;
 593                                 break;
 594                         }
 595                 }
 596
 597                 post_deps[i].syncobj =
 598                         drm_syncobj_find(file, syncobj_desc.handle);
 599                 if (!post_deps[i].syncobj) {
 600                         ret = -EINVAL;
 601                         break;
 602                 }
 603         }
 604
 605         if (ret) {
 606                 for (j = 0; j <= i; ++j) {
 607                         dma_fence_chain_free(post_deps[j].chain);
 608                         if (post_deps[j].syncobj)
 609                                 drm_syncobj_put(post_deps[j].syncobj);
 610                 }
 611
 612                 kfree(post_deps);
 613                 return ERR_PTR(ret);
 614         }
 615
 616         return post_deps;
 617 }
 618
 619 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
 620                                   uint32_t count, struct dma_fence *fence)
 621 {
 622         uint32_t i;
 623
 624         for (i = 0; post_deps && i < count; ++i) {
 625                 if (post_deps[i].chain) {
 626                         drm_syncobj_add_point(post_deps[i].syncobj,
 627                                               post_deps[i].chain,
 628                                               fence, post_deps[i].point);
 629                         post_deps[i].chain = NULL;
 630                 } else {
 631                         drm_syncobj_replace_fence(post_deps[i].syncobj,
 632                                                   fence);
 633                 }
 634         }
 635 }
 636
 637 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 638                 struct drm_file *file)
 639 {
 640         static atomic_t ident = ATOMIC_INIT(0);
 641         struct msm_drm_private *priv = dev->dev_private;
 642         struct drm_msm_gem_submit *args = data;
 643         struct msm_file_private *ctx = file->driver_priv;
 644         struct msm_gem_submit *submit;
 645         struct msm_gpu *gpu = priv->gpu;
 646         struct sync_file *sync_file = NULL;
 647         struct msm_gpu_submitqueue *queue;
 648         struct msm_ringbuffer *ring;
 649         struct msm_submit_post_dep *post_deps = NULL;
 650         struct drm_syncobj **syncobjs_to_reset = NULL;
 651         int out_fence_fd = -1;
 652         struct pid *pid = get_pid(task_pid(current));
 653         bool has_ww_ticket = false;
 654         unsigned i;
 655         int ret, submitid;
 656         if (!gpu)
 657                 return -ENXIO;
 658
 659         if (args->pad)
 660                 return -EINVAL;
 661
 662         /* for now, we just have 3d pipe.. eventually this would need to
 663          * be more clever to dispatch to appropriate gpu module:
 664          */
 665         if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
 666                 return -EINVAL;
 667
 668         if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
 669                 return -EINVAL;
 670
 671         if (args->flags & MSM_SUBMIT_SUDO) {
 672                 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
 673                     !capable(CAP_SYS_RAWIO))
 674                         return -EINVAL;
 675         }
 676
 677         queue = msm_submitqueue_get(ctx, args->queueid);
 678         if (!queue)
 679                 return -ENOENT;
 680
 681         /* Get a unique identifier for the submission for logging purposes */
 682         submitid = atomic_inc_return(&ident) - 1;
 683
 684         ring = gpu->rb[queue->prio];
 685         trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid,
 686                 args->nr_bos, args->nr_cmds);
 687
 688         if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
 689                 struct dma_fence *in_fence;
 690
 691                 in_fence = sync_file_get_fence(args->fence_fd);
 692
 693                 if (!in_fence)
 694                         return -EINVAL;
 695
 696                 /*
 697                  * Wait if the fence is from a foreign context, or if the fence
 698                  * array contains any fence from a foreign context.
 699                  */
 700                 ret = 0;
 701                 if (!dma_fence_match_context(in_fence, ring->fctx->context))
 702                         ret = dma_fence_wait(in_fence, true);
 703
 704                 dma_fence_put(in_fence);
 705                 if (ret)
 706                         return ret;
 707         }
 708
 709         if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
 710                 syncobjs_to_reset = msm_wait_deps(dev, file,
 711                                                   args->in_syncobjs,
 712                                                   args->nr_in_syncobjs,
 713                                                   args->syncobj_stride, ring);
 714                 if (IS_ERR(syncobjs_to_reset))
 715                         return PTR_ERR(syncobjs_to_reset);
 716         }
 717
 718         if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
 719                 post_deps = msm_parse_post_deps(dev, file,
 720                                                 args->out_syncobjs,
 721                                                 args->nr_out_syncobjs,
 722                                                 args->syncobj_stride);
 723                 if (IS_ERR(post_deps)) {
 724                         ret = PTR_ERR(post_deps);
 725                         goto out_post_unlock;
 726                 }
 727         }
 728
 729         ret = mutex_lock_interruptible(&dev->struct_mutex);
 730         if (ret)
 731                 goto out_post_unlock;
 732
 733         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 734                 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
 735                 if (out_fence_fd < 0) {
 736                         ret = out_fence_fd;
 737                         goto out_unlock;
 738                 }
 739         }
 740
 741         submit = submit_create(dev, gpu, queue, args->nr_bos,
 742                 args->nr_cmds);
 743         if (!submit) {
 744                 ret = -ENOMEM;
 745                 goto out_unlock;
 746         }
 747
 748         submit->pid = pid;
 749         submit->ident = submitid;
 750
 751         if (args->flags & MSM_SUBMIT_SUDO)
 752                 submit->in_rb = true;
 753
 754         ret = submit_lookup_objects(submit, args, file);
 755         if (ret)
 756                 goto out_pre_pm;
 757
 758         ret = submit_lookup_cmds(submit, args, file);
 759         if (ret)
 760                 goto out_pre_pm;
 761
 762         /*
 763          * Thanks to dev_pm_opp opp_table_lock interactions with mm->mmap_sem
 764          * in the resume path, we need to to rpm get before we lock objs.
 765          * Which unfortunately might involve powering up the GPU sooner than
 766          * is necessary.  But at least in the explicit fencing case, we will
 767          * have already done all the fence waiting.
 768          */
 769         pm_runtime_get_sync(&gpu->pdev->dev);
 770
 771         /* copy_*_user while holding a ww ticket upsets lockdep */
 772         ww_acquire_init(&submit->ticket, &reservation_ww_class);
 773         has_ww_ticket = true;
 774         ret = submit_lock_objects(submit);
 775         if (ret)
 776                 goto out;
 777
 778         ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
 779         if (ret)
 780                 goto out;
 781
 782         ret = submit_pin_objects(submit);
 783         if (ret)
 784                 goto out;
 785
 786         for (i = 0; i < args->nr_cmds; i++) {
 787                 struct msm_gem_object *msm_obj;
 788                 uint64_t iova;
 789
 790                 ret = submit_bo(submit, submit->cmd[i].idx,
 791                                 &msm_obj, &iova, NULL);
 792                 if (ret)
 793                         goto out;
 794
 795                 if (!submit->cmd[i].size ||
 796                         ((submit->cmd[i].size + submit->cmd[i].offset) >
 797                                 msm_obj->base.size / 4)) {
 798                         DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4);
 799                         ret = -EINVAL;
 800                         goto out;
 801                 }
 802
 803                 submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4);
 804
 805                 if (submit->valid)
 806                         continue;
 807
 808                 ret = submit_reloc(submit, msm_obj, submit->cmd[i].offset * 4,
 809                                 submit->cmd[i].nr_relocs, submit->cmd[i].relocs);
 810                 if (ret)
 811                         goto out;
 812         }
 813
 814         submit->nr_cmds = i;
 815
 816         submit->fence = msm_fence_alloc(ring->fctx);
 817         if (IS_ERR(submit->fence)) {
 818                 ret = PTR_ERR(submit->fence);
 819                 submit->fence = NULL;
 820                 goto out;
 821         }
 822
 823         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 824                 sync_file = sync_file_create(submit->fence);
 825                 if (!sync_file) {
 826                         ret = -ENOMEM;
 827                         goto out;
 828                 }
 829         }
 830
 831         msm_gpu_submit(gpu, submit);
 832
 833         args->fence = submit->fence->seqno;
 834
 835         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 836                 fd_install(out_fence_fd, sync_file->file);
 837                 args->fence_fd = out_fence_fd;
 838         }
 839
 840         msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
 841         msm_process_post_deps(post_deps, args->nr_out_syncobjs,
 842                               submit->fence);
 843
 844
 845 out:
 846         pm_runtime_put(&gpu->pdev->dev);
 847 out_pre_pm:
 848         submit_cleanup(submit);
 849         if (has_ww_ticket)
 850                 ww_acquire_fini(&submit->ticket);
 851         msm_gem_submit_put(submit);
 852 out_unlock:
 853         if (ret && (out_fence_fd >= 0))
 854                 put_unused_fd(out_fence_fd);
 855         mutex_unlock(&dev->struct_mutex);
 856
 857 out_post_unlock:
 858         if (!IS_ERR_OR_NULL(post_deps)) {
 859                 for (i = 0; i < args->nr_out_syncobjs; ++i) {
 860                         kfree(post_deps[i].chain);
 861                         drm_syncobj_put(post_deps[i].syncobj);
 862                 }
 863                 kfree(post_deps);
 864         }
 865
 866         if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
 867                 for (i = 0; i < args->nr_in_syncobjs; ++i) {
 868                         if (syncobjs_to_reset[i])
 869                                 drm_syncobj_put(syncobjs_to_reset[i]);
 870                 }
 871                 kfree(syncobjs_to_reset);
 872         }
 873
 874         return ret;
 875 }