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
  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                 userptr = u64_to_user_ptr(submit_cmd.relocs);
 202
 203                 sz = array_size(submit_cmd.nr_relocs,
 204                                 sizeof(struct drm_msm_gem_submit_reloc));
 205                 /* check for overflow: */
 206                 if (sz == SIZE_MAX) {
 207                         ret = -ENOMEM;
 208                         goto out;
 209                 }
 210                 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL);
 211                 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
 212                 if (ret) {
 213                         ret = -EFAULT;
 214                         goto out;
 215                 }
 216         }
 217
 218 out:
 219         return ret;
 220 }
 221
 222 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit,
 223                 int i, bool backoff)
 224 {
 225         struct msm_gem_object *msm_obj = submit->bos[i].obj;
 226
 227         if (submit->bos[i].flags & BO_PINNED)
 228                 msm_gem_unpin_iova_locked(&msm_obj->base, submit->aspace);
 229
 230         if (submit->bos[i].flags & BO_LOCKED)
 231                 dma_resv_unlock(msm_obj->base.resv);
 232
 233         if (backoff && !(submit->bos[i].flags & BO_VALID))
 234                 submit->bos[i].iova = 0;
 235
 236         submit->bos[i].flags &= ~(BO_LOCKED | BO_PINNED);
 237 }
 238
 239 /* This is where we make sure all the bo's are reserved and pin'd: */
 240 static int submit_lock_objects(struct msm_gem_submit *submit)
 241 {
 242         int contended, slow_locked = -1, i, ret = 0;
 243
 244 retry:
 245         for (i = 0; i < submit->nr_bos; i++) {
 246                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 247
 248                 if (slow_locked == i)
 249                         slow_locked = -1;
 250
 251                 contended = i;
 252
 253                 if (!(submit->bos[i].flags & BO_LOCKED)) {
 254                         ret = dma_resv_lock_interruptible(msm_obj->base.resv,
 255                                                           &submit->ticket);
 256                         if (ret)
 257                                 goto fail;
 258                         submit->bos[i].flags |= BO_LOCKED;
 259                 }
 260         }
 261
 262         ww_acquire_done(&submit->ticket);
 263
 264         return 0;
 265
 266 fail:
 267         for (; i >= 0; i--)
 268                 submit_unlock_unpin_bo(submit, i, true);
 269
 270         if (slow_locked > 0)
 271                 submit_unlock_unpin_bo(submit, slow_locked, true);
 272
 273         if (ret == -EDEADLK) {
 274                 struct msm_gem_object *msm_obj = submit->bos[contended].obj;
 275                 /* we lost out in a seqno race, lock and retry.. */
 276                 ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
 277                                                        &submit->ticket);
 278                 if (!ret) {
 279                         submit->bos[contended].flags |= BO_LOCKED;
 280                         slow_locked = contended;
 281                         goto retry;
 282                 }
 283         }
 284
 285         return ret;
 286 }
 287
 288 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
 289 {
 290         int i, ret = 0;
 291
 292         for (i = 0; i < submit->nr_bos; i++) {
 293                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 294                 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
 295
 296                 if (!write) {
 297                         /* NOTE: _reserve_shared() must happen before
 298                          * _add_shared_fence(), which makes this a slightly
 299                          * strange place to call it.  OTOH this is a
 300                          * convenient can-fail point to hook it in.
 301                          */
 302                         ret = dma_resv_reserve_shared(msm_obj->base.resv,
 303                                                                 1);
 304                         if (ret)
 305                                 return ret;
 306                 }
 307
 308                 if (no_implicit)
 309                         continue;
 310
 311                 ret = msm_gem_sync_object(&msm_obj->base, submit->ring->fctx,
 312                         write);
 313                 if (ret)
 314                         break;
 315         }
 316
 317         return ret;
 318 }
 319
 320 static int submit_pin_objects(struct msm_gem_submit *submit)
 321 {
 322         int i, ret = 0;
 323
 324         submit->valid = true;
 325
 326         for (i = 0; i < submit->nr_bos; i++) {
 327                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 328                 uint64_t iova;
 329
 330                 /* if locking succeeded, pin bo: */
 331                 ret = msm_gem_get_and_pin_iova_locked(&msm_obj->base,
 332                                 submit->aspace, &iova);
 333
 334                 if (ret)
 335                         break;
 336
 337                 submit->bos[i].flags |= BO_PINNED;
 338
 339                 if (iova == submit->bos[i].iova) {
 340                         submit->bos[i].flags |= BO_VALID;
 341                 } else {
 342                         submit->bos[i].iova = iova;
 343                         /* iova changed, so address in cmdstream is not valid: */
 344                         submit->bos[i].flags &= ~BO_VALID;
 345                         submit->valid = false;
 346                 }
 347         }
 348
 349         return ret;
 350 }
 351
 352 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
 353                 struct msm_gem_object **obj, uint64_t *iova, bool *valid)
 354 {
 355         if (idx >= submit->nr_bos) {
 356                 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
 357                                 idx, submit->nr_bos);
 358                 return -EINVAL;
 359         }
 360
 361         if (obj)
 362                 *obj = submit->bos[idx].obj;
 363         if (iova)
 364                 *iova = submit->bos[idx].iova;
 365         if (valid)
 366                 *valid = !!(submit->bos[idx].flags & BO_VALID);
 367
 368         return 0;
 369 }
 370
 371 /* process the reloc's and patch up the cmdstream as needed: */
 372 static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
 373                 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs)
 374 {
 375         uint32_t i, last_offset = 0;
 376         uint32_t *ptr;
 377         int ret = 0;
 378
 379         if (!nr_relocs)
 380                 return 0;
 381
 382         if (offset % 4) {
 383                 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
 384                 return -EINVAL;
 385         }
 386
 387         /* For now, just map the entire thing.  Eventually we probably
 388          * to do it page-by-page, w/ kmap() if not vmap()d..
 389          */
 390         ptr = msm_gem_get_vaddr_locked(&obj->base);
 391
 392         if (IS_ERR(ptr)) {
 393                 ret = PTR_ERR(ptr);
 394                 DBG("failed to map: %d", ret);
 395                 return ret;
 396         }
 397
 398         for (i = 0; i < nr_relocs; i++) {
 399                 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i];
 400                 uint32_t off;
 401                 uint64_t iova;
 402                 bool valid;
 403
 404                 if (submit_reloc.submit_offset % 4) {
 405                         DRM_ERROR("non-aligned reloc offset: %u\n",
 406                                         submit_reloc.submit_offset);
 407                         ret = -EINVAL;
 408                         goto out;
 409                 }
 410
 411                 /* offset in dwords: */
 412                 off = submit_reloc.submit_offset / 4;
 413
 414                 if ((off >= (obj->base.size / 4)) ||
 415                                 (off < last_offset)) {
 416                         DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
 417                         ret = -EINVAL;
 418                         goto out;
 419                 }
 420
 421                 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
 422                 if (ret)
 423                         goto out;
 424
 425                 if (valid)
 426                         continue;
 427
 428                 iova += submit_reloc.reloc_offset;
 429
 430                 if (submit_reloc.shift < 0)
 431                         iova >>= -submit_reloc.shift;
 432                 else
 433                         iova <<= submit_reloc.shift;
 434
 435                 ptr[off] = iova | submit_reloc.or;
 436
 437                 last_offset = off;
 438         }
 439
 440 out:
 441         msm_gem_put_vaddr_locked(&obj->base);
 442
 443         return ret;
 444 }
 445
 446 static void submit_cleanup(struct msm_gem_submit *submit)
 447 {
 448         unsigned i;
 449
 450         for (i = 0; i < submit->nr_bos; i++) {
 451                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 452                 submit_unlock_unpin_bo(submit, i, false);
 453                 list_del_init(&msm_obj->submit_entry);
 454                 drm_gem_object_put_locked(&msm_obj->base);
 455         }
 456 }
 457
 458
 459 struct msm_submit_post_dep {
 460         struct drm_syncobj *syncobj;
 461         uint64_t point;
 462         struct dma_fence_chain *chain;
 463 };
 464
 465 static struct drm_syncobj **msm_wait_deps(struct drm_device *dev,
 466                                           struct drm_file *file,
 467                                           uint64_t in_syncobjs_addr,
 468                                           uint32_t nr_in_syncobjs,
 469                                           size_t syncobj_stride,
 470                                           struct msm_ringbuffer *ring)
 471 {
 472         struct drm_syncobj **syncobjs = NULL;
 473         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 474         int ret = 0;
 475         uint32_t i, j;
 476
 477         syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
 478                            GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 479         if (!syncobjs)
 480                 return ERR_PTR(-ENOMEM);
 481
 482         for (i = 0; i < nr_in_syncobjs; ++i) {
 483                 uint64_t address = in_syncobjs_addr + i * syncobj_stride;
 484                 struct dma_fence *fence;
 485
 486                 if (copy_from_user(&syncobj_desc,
 487                                    u64_to_user_ptr(address),
 488                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 489                         ret = -EFAULT;
 490                         break;
 491                 }
 492
 493                 if (syncobj_desc.point &&
 494                     !drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) {
 495                         ret = -EOPNOTSUPP;
 496                         break;
 497                 }
 498
 499                 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
 500                         ret = -EINVAL;
 501                         break;
 502                 }
 503
 504                 ret = drm_syncobj_find_fence(file, syncobj_desc.handle,
 505                                              syncobj_desc.point, 0, &fence);
 506                 if (ret)
 507                         break;
 508
 509                 if (!dma_fence_match_context(fence, ring->fctx->context))
 510                         ret = dma_fence_wait(fence, true);
 511
 512                 dma_fence_put(fence);
 513                 if (ret)
 514                         break;
 515
 516                 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
 517                         syncobjs[i] =
 518                                 drm_syncobj_find(file, syncobj_desc.handle);
 519                         if (!syncobjs[i]) {
 520                                 ret = -EINVAL;
 521                                 break;
 522                         }
 523                 }
 524         }
 525
 526         if (ret) {
 527                 for (j = 0; j <= i; ++j) {
 528                         if (syncobjs[j])
 529                                 drm_syncobj_put(syncobjs[j]);
 530                 }
 531                 kfree(syncobjs);
 532                 return ERR_PTR(ret);
 533         }
 534         return syncobjs;
 535 }
 536
 537 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
 538                                uint32_t nr_syncobjs)
 539 {
 540         uint32_t i;
 541
 542         for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
 543                 if (syncobjs[i])
 544                         drm_syncobj_replace_fence(syncobjs[i], NULL);
 545         }
 546 }
 547
 548 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
 549                                                        struct drm_file *file,
 550                                                        uint64_t syncobjs_addr,
 551                                                        uint32_t nr_syncobjs,
 552                                                        size_t syncobj_stride)
 553 {
 554         struct msm_submit_post_dep *post_deps;
 555         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 556         int ret = 0;
 557         uint32_t i, j;
 558
 559         post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps),
 560                                   GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 561         if (!post_deps)
 562                 return ERR_PTR(-ENOMEM);
 563
 564         for (i = 0; i < nr_syncobjs; ++i) {
 565                 uint64_t address = syncobjs_addr + i * syncobj_stride;
 566
 567                 if (copy_from_user(&syncobj_desc,
 568                                    u64_to_user_ptr(address),
 569                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 570                         ret = -EFAULT;
 571                         break;
 572                 }
 573
 574                 post_deps[i].point = syncobj_desc.point;
 575                 post_deps[i].chain = NULL;
 576
 577                 if (syncobj_desc.flags) {
 578                         ret = -EINVAL;
 579                         break;
 580                 }
 581
 582                 if (syncobj_desc.point) {
 583                         if (!drm_core_check_feature(dev,
 584                                                     DRIVER_SYNCOBJ_TIMELINE)) {
 585                                 ret = -EOPNOTSUPP;
 586                                 break;
 587                         }
 588
 589                         post_deps[i].chain =
 590                                 kmalloc(sizeof(*post_deps[i].chain),
 591                                         GFP_KERNEL);
 592                         if (!post_deps[i].chain) {
 593                                 ret = -ENOMEM;
 594                                 break;
 595                         }
 596                 }
 597
 598                 post_deps[i].syncobj =
 599                         drm_syncobj_find(file, syncobj_desc.handle);
 600                 if (!post_deps[i].syncobj) {
 601                         ret = -EINVAL;
 602                         break;
 603                 }
 604         }
 605
 606         if (ret) {
 607                 for (j = 0; j <= i; ++j) {
 608                         kfree(post_deps[j].chain);
 609                         if (post_deps[j].syncobj)
 610                                 drm_syncobj_put(post_deps[j].syncobj);
 611                 }
 612
 613                 kfree(post_deps);
 614                 return ERR_PTR(ret);
 615         }
 616
 617         return post_deps;
 618 }
 619
 620 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
 621                                   uint32_t count, struct dma_fence *fence)
 622 {
 623         uint32_t i;
 624
 625         for (i = 0; post_deps && i < count; ++i) {
 626                 if (post_deps[i].chain) {
 627                         drm_syncobj_add_point(post_deps[i].syncobj,
 628                                               post_deps[i].chain,
 629                                               fence, post_deps[i].point);
 630                         post_deps[i].chain = NULL;
 631                 } else {
 632                         drm_syncobj_replace_fence(post_deps[i].syncobj,
 633                                                   fence);
 634                 }
 635         }
 636 }
 637
 638 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 639                 struct drm_file *file)
 640 {
 641         static atomic_t ident = ATOMIC_INIT(0);
 642         struct msm_drm_private *priv = dev->dev_private;
 643         struct drm_msm_gem_submit *args = data;
 644         struct msm_file_private *ctx = file->driver_priv;
 645         struct msm_gem_submit *submit;
 646         struct msm_gpu *gpu = priv->gpu;
 647         struct sync_file *sync_file = NULL;
 648         struct msm_gpu_submitqueue *queue;
 649         struct msm_ringbuffer *ring;
 650         struct msm_submit_post_dep *post_deps = NULL;
 651         struct drm_syncobj **syncobjs_to_reset = NULL;
 652         int out_fence_fd = -1;
 653         struct pid *pid = get_pid(task_pid(current));
 654         bool has_ww_ticket = false;
 655         unsigned i;
 656         int ret, submitid;
 657         if (!gpu)
 658                 return -ENXIO;
 659
 660         if (args->pad)
 661                 return -EINVAL;
 662
 663         /* for now, we just have 3d pipe.. eventually this would need to
 664          * be more clever to dispatch to appropriate gpu module:
 665          */
 666         if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
 667                 return -EINVAL;
 668
 669         if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
 670                 return -EINVAL;
 671
 672         if (args->flags & MSM_SUBMIT_SUDO) {
 673                 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
 674                     !capable(CAP_SYS_RAWIO))
 675                         return -EINVAL;
 676         }
 677
 678         queue = msm_submitqueue_get(ctx, args->queueid);
 679         if (!queue)
 680                 return -ENOENT;
 681
 682         /* Get a unique identifier for the submission for logging purposes */
 683         submitid = atomic_inc_return(&ident) - 1;
 684
 685         ring = gpu->rb[queue->prio];
 686         trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid,
 687                 args->nr_bos, args->nr_cmds);
 688
 689         if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
 690                 struct dma_fence *in_fence;
 691
 692                 in_fence = sync_file_get_fence(args->fence_fd);
 693
 694                 if (!in_fence)
 695                         return -EINVAL;
 696
 697                 /*
 698                  * Wait if the fence is from a foreign context, or if the fence
 699                  * array contains any fence from a foreign context.
 700                  */
 701                 ret = 0;
 702                 if (!dma_fence_match_context(in_fence, ring->fctx->context))
 703                         ret = dma_fence_wait(in_fence, true);
 704
 705                 dma_fence_put(in_fence);
 706                 if (ret)
 707                         return ret;
 708         }
 709
 710         if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
 711                 syncobjs_to_reset = msm_wait_deps(dev, file,
 712                                                   args->in_syncobjs,
 713                                                   args->nr_in_syncobjs,
 714                                                   args->syncobj_stride, ring);
 715                 if (IS_ERR(syncobjs_to_reset))
 716                         return PTR_ERR(syncobjs_to_reset);
 717         }
 718
 719         if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
 720                 post_deps = msm_parse_post_deps(dev, file,
 721                                                 args->out_syncobjs,
 722                                                 args->nr_out_syncobjs,
 723                                                 args->syncobj_stride);
 724                 if (IS_ERR(post_deps)) {
 725                         ret = PTR_ERR(post_deps);
 726                         goto out_post_unlock;
 727                 }
 728         }
 729
 730         ret = mutex_lock_interruptible(&dev->struct_mutex);
 731         if (ret)
 732                 goto out_post_unlock;
 733
 734         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 735                 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
 736                 if (out_fence_fd < 0) {
 737                         ret = out_fence_fd;
 738                         goto out_unlock;
 739                 }
 740         }
 741
 742         submit = submit_create(dev, gpu, queue, args->nr_bos,
 743                 args->nr_cmds);
 744         if (!submit) {
 745                 ret = -ENOMEM;
 746                 goto out_unlock;
 747         }
 748
 749         submit->pid = pid;
 750         submit->ident = submitid;
 751
 752         if (args->flags & MSM_SUBMIT_SUDO)
 753                 submit->in_rb = true;
 754
 755         ret = submit_lookup_objects(submit, args, file);
 756         if (ret)
 757                 goto out_pre_pm;
 758
 759         ret = submit_lookup_cmds(submit, args, file);
 760         if (ret)
 761                 goto out_pre_pm;
 762
 763         /*
 764          * Thanks to dev_pm_opp opp_table_lock interactions with mm->mmap_sem
 765          * in the resume path, we need to to rpm get before we lock objs.
 766          * Which unfortunately might involve powering up the GPU sooner than
 767          * is necessary.  But at least in the explicit fencing case, we will
 768          * have already done all the fence waiting.
 769          */
 770         pm_runtime_get_sync(&gpu->pdev->dev);
 771
 772         /* copy_*_user while holding a ww ticket upsets lockdep */
 773         ww_acquire_init(&submit->ticket, &reservation_ww_class);
 774         has_ww_ticket = true;
 775         ret = submit_lock_objects(submit);
 776         if (ret)
 777                 goto out;
 778
 779         ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
 780         if (ret)
 781                 goto out;
 782
 783         ret = submit_pin_objects(submit);
 784         if (ret)
 785                 goto out;
 786
 787         for (i = 0; i < args->nr_cmds; i++) {
 788                 struct msm_gem_object *msm_obj;
 789                 uint64_t iova;
 790
 791                 ret = submit_bo(submit, submit->cmd[i].idx,
 792                                 &msm_obj, &iova, NULL);
 793                 if (ret)
 794                         goto out;
 795
 796                 if (!submit->cmd[i].size ||
 797                         ((submit->cmd[i].size + submit->cmd[i].offset) >
 798                                 msm_obj->base.size / 4)) {
 799                         DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4);
 800                         ret = -EINVAL;
 801                         goto out;
 802                 }
 803
 804                 submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4);
 805
 806                 if (submit->valid)
 807                         continue;
 808
 809                 ret = submit_reloc(submit, msm_obj, submit->cmd[i].offset * 4,
 810                                 submit->cmd[i].nr_relocs, submit->cmd[i].relocs);
 811                 if (ret)
 812                         goto out;
 813         }
 814
 815         submit->nr_cmds = i;
 816
 817         submit->fence = msm_fence_alloc(ring->fctx);
 818         if (IS_ERR(submit->fence)) {
 819                 ret = PTR_ERR(submit->fence);
 820                 submit->fence = NULL;
 821                 goto out;
 822         }
 823
 824         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 825                 sync_file = sync_file_create(submit->fence);
 826                 if (!sync_file) {
 827                         ret = -ENOMEM;
 828                         goto out;
 829                 }
 830         }
 831
 832         msm_gpu_submit(gpu, submit);
 833
 834         args->fence = submit->fence->seqno;
 835
 836         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 837                 fd_install(out_fence_fd, sync_file->file);
 838                 args->fence_fd = out_fence_fd;
 839         }
 840
 841         msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
 842         msm_process_post_deps(post_deps, args->nr_out_syncobjs,
 843                               submit->fence);
 844
 845
 846 out:
 847         pm_runtime_put(&gpu->pdev->dev);
 848 out_pre_pm:
 849         submit_cleanup(submit);
 850         if (has_ww_ticket)
 851                 ww_acquire_fini(&submit->ticket);
 852         msm_gem_submit_put(submit);
 853 out_unlock:
 854         if (ret && (out_fence_fd >= 0))
 855                 put_unused_fd(out_fence_fd);
 856         mutex_unlock(&dev->struct_mutex);
 857
 858 out_post_unlock:
 859         if (!IS_ERR_OR_NULL(post_deps)) {
 860                 for (i = 0; i < args->nr_out_syncobjs; ++i) {
 861                         kfree(post_deps[i].chain);
 862                         drm_syncobj_put(post_deps[i].syncobj);
 863                 }
 864                 kfree(post_deps);
 865         }
 866
 867         if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
 868                 for (i = 0; i < args->nr_in_syncobjs; ++i) {
 869                         if (syncobjs_to_reset[i])
 870                                 drm_syncobj_put(syncobjs_to_reset[i]);
 871                 }
 872                 kfree(syncobjs_to_reset);
 873         }
 874
 875         return ret;
 876 }