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   /* obj lock is held */
  27 #define BO_ACTIVE   0x2000   /* active refcnt is held */
  28 #define BO_PINNED   0x1000   /* obj is pinned and on active list */
  29
  30 static struct msm_gem_submit *submit_create(struct drm_device *dev,
  31                 struct msm_gpu *gpu,
  32                 struct msm_gpu_submitqueue *queue, uint32_t nr_bos,
  33                 uint32_t nr_cmds)
  34 {
  35         struct msm_gem_submit *submit;
  36         uint64_t sz;
  37         int ret;
  38
  39         sz = struct_size(submit, bos, nr_bos) +
  40                         ((u64)nr_cmds * sizeof(submit->cmd[0]));
  41
  42         if (sz > SIZE_MAX)
  43                 return ERR_PTR(-ENOMEM);
  44
  45         submit = kzalloc(sz, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
  46         if (!submit)
  47                 return ERR_PTR(-ENOMEM);
  48
  49         ret = drm_sched_job_init(&submit->base, queue->entity, queue);
  50         if (ret) {
  51                 kfree(submit);
  52                 return ERR_PTR(ret);
  53         }
  54
  55         xa_init_flags(&submit->deps, XA_FLAGS_ALLOC);
  56
  57         kref_init(&submit->ref);
  58         submit->dev = dev;
  59         submit->aspace = queue->ctx->aspace;
  60         submit->gpu = gpu;
  61         submit->cmd = (void *)&submit->bos[nr_bos];
  62         submit->queue = queue;
  63         submit->ring = gpu->rb[queue->ring_nr];
  64         submit->fault_dumped = false;
  65
  66         INIT_LIST_HEAD(&submit->node);
  67
  68         return submit;
  69 }
  70
  71 void __msm_gem_submit_destroy(struct kref *kref)
  72 {
  73         struct msm_gem_submit *submit =
  74                         container_of(kref, struct msm_gem_submit, ref);
  75         unsigned long index;
  76         struct dma_fence *fence;
  77         unsigned i;
  78
  79         if (submit->fence_id) {
  80                 mutex_lock(&submit->queue->lock);
  81                 idr_remove(&submit->queue->fence_idr, submit->fence_id);
  82                 mutex_unlock(&submit->queue->lock);
  83         }
  84
  85         xa_for_each (&submit->deps, index, fence) {
  86                 dma_fence_put(fence);
  87         }
  88
  89         xa_destroy(&submit->deps);
  90
  91         dma_fence_put(submit->user_fence);
  92         dma_fence_put(submit->hw_fence);
  93
  94         put_pid(submit->pid);
  95         msm_submitqueue_put(submit->queue);
  96
  97         for (i = 0; i < submit->nr_cmds; i++)
  98                 kfree(submit->cmd[i].relocs);
  99
 100         kfree(submit);
 101 }
 102
 103 static int submit_lookup_objects(struct msm_gem_submit *submit,
 104                 struct drm_msm_gem_submit *args, struct drm_file *file)
 105 {
 106         unsigned i;
 107         int ret = 0;
 108
 109         for (i = 0; i < args->nr_bos; i++) {
 110                 struct drm_msm_gem_submit_bo submit_bo;
 111                 void __user *userptr =
 112                         u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
 113
 114                 /* make sure we don't have garbage flags, in case we hit
 115                  * error path before flags is initialized:
 116                  */
 117                 submit->bos[i].flags = 0;
 118
 119                 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
 120                         ret = -EFAULT;
 121                         i = 0;
 122                         goto out;
 123                 }
 124
 125 /* at least one of READ and/or WRITE flags should be set: */
 126 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
 127
 128                 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
 129                         !(submit_bo.flags & MANDATORY_FLAGS)) {
 130                         DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
 131                         ret = -EINVAL;
 132                         i = 0;
 133                         goto out;
 134                 }
 135
 136                 submit->bos[i].handle = submit_bo.handle;
 137                 submit->bos[i].flags = submit_bo.flags;
 138                 /* in validate_objects() we figure out if this is true: */
 139                 submit->bos[i].iova  = submit_bo.presumed;
 140         }
 141
 142         spin_lock(&file->table_lock);
 143
 144         for (i = 0; i < args->nr_bos; i++) {
 145                 struct drm_gem_object *obj;
 146
 147                 /* normally use drm_gem_object_lookup(), but for bulk lookup
 148                  * all under single table_lock just hit object_idr directly:
 149                  */
 150                 obj = idr_find(&file->object_idr, submit->bos[i].handle);
 151                 if (!obj) {
 152                         DRM_ERROR("invalid handle %u at index %u\n", submit->bos[i].handle, i);
 153                         ret = -EINVAL;
 154                         goto out_unlock;
 155                 }
 156
 157                 drm_gem_object_get(obj);
 158
 159                 submit->bos[i].obj = to_msm_bo(obj);
 160         }
 161
 162 out_unlock:
 163         spin_unlock(&file->table_lock);
 164
 165 out:
 166         submit->nr_bos = i;
 167
 168         return ret;
 169 }
 170
 171 static int submit_lookup_cmds(struct msm_gem_submit *submit,
 172                 struct drm_msm_gem_submit *args, struct drm_file *file)
 173 {
 174         unsigned i;
 175         size_t sz;
 176         int ret = 0;
 177
 178         for (i = 0; i < args->nr_cmds; i++) {
 179                 struct drm_msm_gem_submit_cmd submit_cmd;
 180                 void __user *userptr =
 181                         u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
 182
 183                 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
 184                 if (ret) {
 185                         ret = -EFAULT;
 186                         goto out;
 187                 }
 188
 189                 /* validate input from userspace: */
 190                 switch (submit_cmd.type) {
 191                 case MSM_SUBMIT_CMD_BUF:
 192                 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
 193                 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 194                         break;
 195                 default:
 196                         DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
 197                         return -EINVAL;
 198                 }
 199
 200                 if (submit_cmd.size % 4) {
 201                         DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
 202                                         submit_cmd.size);
 203                         ret = -EINVAL;
 204                         goto out;
 205                 }
 206
 207                 submit->cmd[i].type = submit_cmd.type;
 208                 submit->cmd[i].size = submit_cmd.size / 4;
 209                 submit->cmd[i].offset = submit_cmd.submit_offset / 4;
 210                 submit->cmd[i].idx  = submit_cmd.submit_idx;
 211                 submit->cmd[i].nr_relocs = submit_cmd.nr_relocs;
 212
 213                 userptr = u64_to_user_ptr(submit_cmd.relocs);
 214
 215                 sz = array_size(submit_cmd.nr_relocs,
 216                                 sizeof(struct drm_msm_gem_submit_reloc));
 217                 /* check for overflow: */
 218                 if (sz == SIZE_MAX) {
 219                         ret = -ENOMEM;
 220                         goto out;
 221                 }
 222                 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL);
 223                 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
 224                 if (ret) {
 225                         ret = -EFAULT;
 226                         goto out;
 227                 }
 228         }
 229
 230 out:
 231         return ret;
 232 }
 233
 234 /* Unwind bo state, according to cleanup_flags.  In the success case, only
 235  * the lock is dropped at the end of the submit (and active/pin ref is dropped
 236  * later when the submit is retired).
 237  */
 238 static void submit_cleanup_bo(struct msm_gem_submit *submit, int i,
 239                 unsigned cleanup_flags)
 240 {
 241         struct drm_gem_object *obj = &submit->bos[i].obj->base;
 242         unsigned flags = submit->bos[i].flags & cleanup_flags;
 243
 244         if (flags & BO_PINNED)
 245                 msm_gem_unpin_iova_locked(obj, submit->aspace);
 246
 247         if (flags & BO_ACTIVE)
 248                 msm_gem_active_put(obj);
 249
 250         if (flags & BO_LOCKED)
 251                 dma_resv_unlock(obj->resv);
 252
 253         submit->bos[i].flags &= ~cleanup_flags;
 254 }
 255
 256 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
 257 {
 258         submit_cleanup_bo(submit, i, BO_PINNED | BO_ACTIVE | BO_LOCKED);
 259
 260         if (!(submit->bos[i].flags & BO_VALID))
 261                 submit->bos[i].iova = 0;
 262 }
 263
 264 /* This is where we make sure all the bo's are reserved and pin'd: */
 265 static int submit_lock_objects(struct msm_gem_submit *submit)
 266 {
 267         int contended, slow_locked = -1, i, ret = 0;
 268
 269 retry:
 270         for (i = 0; i < submit->nr_bos; i++) {
 271                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 272
 273                 if (slow_locked == i)
 274                         slow_locked = -1;
 275
 276                 contended = i;
 277
 278                 if (!(submit->bos[i].flags & BO_LOCKED)) {
 279                         ret = dma_resv_lock_interruptible(msm_obj->base.resv,
 280                                                           &submit->ticket);
 281                         if (ret)
 282                                 goto fail;
 283                         submit->bos[i].flags |= BO_LOCKED;
 284                 }
 285         }
 286
 287         ww_acquire_done(&submit->ticket);
 288
 289         return 0;
 290
 291 fail:
 292         if (ret == -EALREADY) {
 293                 DRM_ERROR("handle %u at index %u already on submit list\n",
 294                                 submit->bos[i].handle, i);
 295                 ret = -EINVAL;
 296         }
 297
 298         for (; i >= 0; i--)
 299                 submit_unlock_unpin_bo(submit, i);
 300
 301         if (slow_locked > 0)
 302                 submit_unlock_unpin_bo(submit, slow_locked);
 303
 304         if (ret == -EDEADLK) {
 305                 struct msm_gem_object *msm_obj = submit->bos[contended].obj;
 306                 /* we lost out in a seqno race, lock and retry.. */
 307                 ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
 308                                                        &submit->ticket);
 309                 if (!ret) {
 310                         submit->bos[contended].flags |= BO_LOCKED;
 311                         slow_locked = contended;
 312                         goto retry;
 313                 }
 314
 315                 /* Not expecting -EALREADY here, if the bo was already
 316                  * locked, we should have gotten -EALREADY already from
 317                  * the dma_resv_lock_interruptable() call.
 318                  */
 319                 WARN_ON_ONCE(ret == -EALREADY);
 320         }
 321
 322         return ret;
 323 }
 324
 325 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
 326 {
 327         int i, ret = 0;
 328
 329         for (i = 0; i < submit->nr_bos; i++) {
 330                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 331                 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
 332
 333                 if (!write) {
 334                         /* NOTE: _reserve_shared() must happen before
 335                          * _add_shared_fence(), which makes this a slightly
 336                          * strange place to call it.  OTOH this is a
 337                          * convenient can-fail point to hook it in.
 338                          */
 339                         ret = dma_resv_reserve_shared(obj->resv, 1);
 340                         if (ret)
 341                                 return ret;
 342                 }
 343
 344                 if (no_implicit)
 345                         continue;
 346
 347                 ret = drm_gem_fence_array_add_implicit(&submit->deps, obj,
 348                         write);
 349                 if (ret)
 350                         break;
 351         }
 352
 353         return ret;
 354 }
 355
 356 static int submit_pin_objects(struct msm_gem_submit *submit)
 357 {
 358         int i, ret = 0;
 359
 360         submit->valid = true;
 361
 362         /*
 363          * Increment active_count first, so if under memory pressure, we
 364          * don't inadvertently evict a bo needed by the submit in order
 365          * to pin an earlier bo in the same submit.
 366          */
 367         for (i = 0; i < submit->nr_bos; i++) {
 368                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 369
 370                 msm_gem_active_get(obj, submit->gpu);
 371                 submit->bos[i].flags |= BO_ACTIVE;
 372         }
 373
 374         for (i = 0; i < submit->nr_bos; i++) {
 375                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 376                 uint64_t iova;
 377
 378                 /* if locking succeeded, pin bo: */
 379                 ret = msm_gem_get_and_pin_iova_locked(obj,
 380                                 submit->aspace, &iova);
 381
 382                 if (ret)
 383                         break;
 384
 385                 submit->bos[i].flags |= BO_PINNED;
 386
 387                 if (iova == submit->bos[i].iova) {
 388                         submit->bos[i].flags |= BO_VALID;
 389                 } else {
 390                         submit->bos[i].iova = iova;
 391                         /* iova changed, so address in cmdstream is not valid: */
 392                         submit->bos[i].flags &= ~BO_VALID;
 393                         submit->valid = false;
 394                 }
 395         }
 396
 397         return ret;
 398 }
 399
 400 static void submit_attach_object_fences(struct msm_gem_submit *submit)
 401 {
 402         int i;
 403
 404         for (i = 0; i < submit->nr_bos; i++) {
 405                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 406
 407                 if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
 408                         dma_resv_add_excl_fence(obj->resv, submit->user_fence);
 409                 else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
 410                         dma_resv_add_shared_fence(obj->resv, submit->user_fence);
 411         }
 412 }
 413
 414 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
 415                 struct msm_gem_object **obj, uint64_t *iova, bool *valid)
 416 {
 417         if (idx >= submit->nr_bos) {
 418                 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
 419                                 idx, submit->nr_bos);
 420                 return -EINVAL;
 421         }
 422
 423         if (obj)
 424                 *obj = submit->bos[idx].obj;
 425         if (iova)
 426                 *iova = submit->bos[idx].iova;
 427         if (valid)
 428                 *valid = !!(submit->bos[idx].flags & BO_VALID);
 429
 430         return 0;
 431 }
 432
 433 /* process the reloc's and patch up the cmdstream as needed: */
 434 static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
 435                 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs)
 436 {
 437         uint32_t i, last_offset = 0;
 438         uint32_t *ptr;
 439         int ret = 0;
 440
 441         if (!nr_relocs)
 442                 return 0;
 443
 444         if (offset % 4) {
 445                 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
 446                 return -EINVAL;
 447         }
 448
 449         /* For now, just map the entire thing.  Eventually we probably
 450          * to do it page-by-page, w/ kmap() if not vmap()d..
 451          */
 452         ptr = msm_gem_get_vaddr_locked(&obj->base);
 453
 454         if (IS_ERR(ptr)) {
 455                 ret = PTR_ERR(ptr);
 456                 DBG("failed to map: %d", ret);
 457                 return ret;
 458         }
 459
 460         for (i = 0; i < nr_relocs; i++) {
 461                 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i];
 462                 uint32_t off;
 463                 uint64_t iova;
 464                 bool valid;
 465
 466                 if (submit_reloc.submit_offset % 4) {
 467                         DRM_ERROR("non-aligned reloc offset: %u\n",
 468                                         submit_reloc.submit_offset);
 469                         ret = -EINVAL;
 470                         goto out;
 471                 }
 472
 473                 /* offset in dwords: */
 474                 off = submit_reloc.submit_offset / 4;
 475
 476                 if ((off >= (obj->base.size / 4)) ||
 477                                 (off < last_offset)) {
 478                         DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
 479                         ret = -EINVAL;
 480                         goto out;
 481                 }
 482
 483                 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
 484                 if (ret)
 485                         goto out;
 486
 487                 if (valid)
 488                         continue;
 489
 490                 iova += submit_reloc.reloc_offset;
 491
 492                 if (submit_reloc.shift < 0)
 493                         iova >>= -submit_reloc.shift;
 494                 else
 495                         iova <<= submit_reloc.shift;
 496
 497                 ptr[off] = iova | submit_reloc.or;
 498
 499                 last_offset = off;
 500         }
 501
 502 out:
 503         msm_gem_put_vaddr_locked(&obj->base);
 504
 505         return ret;
 506 }
 507
 508 /* Cleanup submit at end of ioctl.  In the error case, this also drops
 509  * references, unpins, and drops active refcnt.  In the non-error case,
 510  * this is done when the submit is retired.
 511  */
 512 static void submit_cleanup(struct msm_gem_submit *submit, bool error)
 513 {
 514         unsigned cleanup_flags = BO_LOCKED;
 515         unsigned i;
 516
 517         if (error)
 518                 cleanup_flags |= BO_PINNED | BO_ACTIVE;
 519
 520         for (i = 0; i < submit->nr_bos; i++) {
 521                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 522                 submit_cleanup_bo(submit, i, cleanup_flags);
 523                 if (error)
 524                         drm_gem_object_put(&msm_obj->base);
 525         }
 526 }
 527
 528 void msm_submit_retire(struct msm_gem_submit *submit)
 529 {
 530         int i;
 531
 532         for (i = 0; i < submit->nr_bos; i++) {
 533                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 534
 535                 msm_gem_lock(obj);
 536                 submit_cleanup_bo(submit, i, BO_PINNED | BO_ACTIVE);
 537                 msm_gem_unlock(obj);
 538                 drm_gem_object_put(obj);
 539         }
 540 }
 541
 542 struct msm_submit_post_dep {
 543         struct drm_syncobj *syncobj;
 544         uint64_t point;
 545         struct dma_fence_chain *chain;
 546 };
 547
 548 static struct drm_syncobj **msm_parse_deps(struct msm_gem_submit *submit,
 549                                            struct drm_file *file,
 550                                            uint64_t in_syncobjs_addr,
 551                                            uint32_t nr_in_syncobjs,
 552                                            size_t syncobj_stride,
 553                                            struct msm_ringbuffer *ring)
 554 {
 555         struct drm_syncobj **syncobjs = NULL;
 556         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 557         int ret = 0;
 558         uint32_t i, j;
 559
 560         syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
 561                            GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 562         if (!syncobjs)
 563                 return ERR_PTR(-ENOMEM);
 564
 565         for (i = 0; i < nr_in_syncobjs; ++i) {
 566                 uint64_t address = in_syncobjs_addr + i * syncobj_stride;
 567                 struct dma_fence *fence;
 568
 569                 if (copy_from_user(&syncobj_desc,
 570                                    u64_to_user_ptr(address),
 571                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 572                         ret = -EFAULT;
 573                         break;
 574                 }
 575
 576                 if (syncobj_desc.point &&
 577                     !drm_core_check_feature(submit->dev, DRIVER_SYNCOBJ_TIMELINE)) {
 578                         ret = -EOPNOTSUPP;
 579                         break;
 580                 }
 581
 582                 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
 583                         ret = -EINVAL;
 584                         break;
 585                 }
 586
 587                 ret = drm_syncobj_find_fence(file, syncobj_desc.handle,
 588                                              syncobj_desc.point, 0, &fence);
 589                 if (ret)
 590                         break;
 591
 592                 ret = drm_gem_fence_array_add(&submit->deps, fence);
 593                 if (ret)
 594                         break;
 595
 596                 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
 597                         syncobjs[i] =
 598                                 drm_syncobj_find(file, syncobj_desc.handle);
 599                         if (!syncobjs[i]) {
 600                                 ret = -EINVAL;
 601                                 break;
 602                         }
 603                 }
 604         }
 605
 606         if (ret) {
 607                 for (j = 0; j <= i; ++j) {
 608                         if (syncobjs[j])
 609                                 drm_syncobj_put(syncobjs[j]);
 610                 }
 611                 kfree(syncobjs);
 612                 return ERR_PTR(ret);
 613         }
 614         return syncobjs;
 615 }
 616
 617 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
 618                                uint32_t nr_syncobjs)
 619 {
 620         uint32_t i;
 621
 622         for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
 623                 if (syncobjs[i])
 624                         drm_syncobj_replace_fence(syncobjs[i], NULL);
 625         }
 626 }
 627
 628 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
 629                                                        struct drm_file *file,
 630                                                        uint64_t syncobjs_addr,
 631                                                        uint32_t nr_syncobjs,
 632                                                        size_t syncobj_stride)
 633 {
 634         struct msm_submit_post_dep *post_deps;
 635         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 636         int ret = 0;
 637         uint32_t i, j;
 638
 639         post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps),
 640                                   GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 641         if (!post_deps)
 642                 return ERR_PTR(-ENOMEM);
 643
 644         for (i = 0; i < nr_syncobjs; ++i) {
 645                 uint64_t address = syncobjs_addr + i * syncobj_stride;
 646
 647                 if (copy_from_user(&syncobj_desc,
 648                                    u64_to_user_ptr(address),
 649                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 650                         ret = -EFAULT;
 651                         break;
 652                 }
 653
 654                 post_deps[i].point = syncobj_desc.point;
 655                 post_deps[i].chain = NULL;
 656
 657                 if (syncobj_desc.flags) {
 658                         ret = -EINVAL;
 659                         break;
 660                 }
 661
 662                 if (syncobj_desc.point) {
 663                         if (!drm_core_check_feature(dev,
 664                                                     DRIVER_SYNCOBJ_TIMELINE)) {
 665                                 ret = -EOPNOTSUPP;
 666                                 break;
 667                         }
 668
 669                         post_deps[i].chain = dma_fence_chain_alloc();
 670                         if (!post_deps[i].chain) {
 671                                 ret = -ENOMEM;
 672                                 break;
 673                         }
 674                 }
 675
 676                 post_deps[i].syncobj =
 677                         drm_syncobj_find(file, syncobj_desc.handle);
 678                 if (!post_deps[i].syncobj) {
 679                         ret = -EINVAL;
 680                         break;
 681                 }
 682         }
 683
 684         if (ret) {
 685                 for (j = 0; j <= i; ++j) {
 686                         dma_fence_chain_free(post_deps[j].chain);
 687                         if (post_deps[j].syncobj)
 688                                 drm_syncobj_put(post_deps[j].syncobj);
 689                 }
 690
 691                 kfree(post_deps);
 692                 return ERR_PTR(ret);
 693         }
 694
 695         return post_deps;
 696 }
 697
 698 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
 699                                   uint32_t count, struct dma_fence *fence)
 700 {
 701         uint32_t i;
 702
 703         for (i = 0; post_deps && i < count; ++i) {
 704                 if (post_deps[i].chain) {
 705                         drm_syncobj_add_point(post_deps[i].syncobj,
 706                                               post_deps[i].chain,
 707                                               fence, post_deps[i].point);
 708                         post_deps[i].chain = NULL;
 709                 } else {
 710                         drm_syncobj_replace_fence(post_deps[i].syncobj,
 711                                                   fence);
 712                 }
 713         }
 714 }
 715
 716 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 717                 struct drm_file *file)
 718 {
 719         static atomic_t ident = ATOMIC_INIT(0);
 720         struct msm_drm_private *priv = dev->dev_private;
 721         struct drm_msm_gem_submit *args = data;
 722         struct msm_file_private *ctx = file->driver_priv;
 723         struct msm_gem_submit *submit = NULL;
 724         struct msm_gpu *gpu = priv->gpu;
 725         struct msm_gpu_submitqueue *queue;
 726         struct msm_ringbuffer *ring;
 727         struct msm_submit_post_dep *post_deps = NULL;
 728         struct drm_syncobj **syncobjs_to_reset = NULL;
 729         int out_fence_fd = -1;
 730         struct pid *pid = get_pid(task_pid(current));
 731         bool has_ww_ticket = false;
 732         unsigned i;
 733         int ret, submitid;
 734
 735         if (!gpu)
 736                 return -ENXIO;
 737
 738         if (args->pad)
 739                 return -EINVAL;
 740
 741         /* for now, we just have 3d pipe.. eventually this would need to
 742          * be more clever to dispatch to appropriate gpu module:
 743          */
 744         if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
 745                 return -EINVAL;
 746
 747         if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
 748                 return -EINVAL;
 749
 750         if (args->flags & MSM_SUBMIT_SUDO) {
 751                 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
 752                     !capable(CAP_SYS_RAWIO))
 753                         return -EINVAL;
 754         }
 755
 756         queue = msm_submitqueue_get(ctx, args->queueid);
 757         if (!queue)
 758                 return -ENOENT;
 759
 760         /* Get a unique identifier for the submission for logging purposes */
 761         submitid = atomic_inc_return(&ident) - 1;
 762
 763         ring = gpu->rb[queue->ring_nr];
 764         trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid,
 765                 args->nr_bos, args->nr_cmds);
 766
 767         ret = mutex_lock_interruptible(&queue->lock);
 768         if (ret)
 769                 goto out_post_unlock;
 770
 771         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 772                 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
 773                 if (out_fence_fd < 0) {
 774                         ret = out_fence_fd;
 775                         goto out_unlock;
 776                 }
 777         }
 778
 779         submit = submit_create(dev, gpu, queue, args->nr_bos,
 780                 args->nr_cmds);
 781         if (IS_ERR(submit)) {
 782                 ret = PTR_ERR(submit);
 783                 goto out_unlock;
 784         }
 785
 786         submit->pid = pid;
 787         submit->ident = submitid;
 788
 789         if (args->flags & MSM_SUBMIT_SUDO)
 790                 submit->in_rb = true;
 791
 792         if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
 793                 struct dma_fence *in_fence;
 794
 795                 in_fence = sync_file_get_fence(args->fence_fd);
 796
 797                 if (!in_fence) {
 798                         ret = -EINVAL;
 799                         goto out_unlock;
 800                 }
 801
 802                 ret = drm_gem_fence_array_add(&submit->deps, in_fence);
 803                 if (ret)
 804                         goto out_unlock;
 805         }
 806
 807         if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
 808                 syncobjs_to_reset = msm_parse_deps(submit, file,
 809                                                    args->in_syncobjs,
 810                                                    args->nr_in_syncobjs,
 811                                                    args->syncobj_stride, ring);
 812                 if (IS_ERR(syncobjs_to_reset)) {
 813                         ret = PTR_ERR(syncobjs_to_reset);
 814                         goto out_unlock;
 815                 }
 816         }
 817
 818         if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
 819                 post_deps = msm_parse_post_deps(dev, file,
 820                                                 args->out_syncobjs,
 821                                                 args->nr_out_syncobjs,
 822                                                 args->syncobj_stride);
 823                 if (IS_ERR(post_deps)) {
 824                         ret = PTR_ERR(post_deps);
 825                         goto out_unlock;
 826                 }
 827         }
 828
 829         ret = submit_lookup_objects(submit, args, file);
 830         if (ret)
 831                 goto out;
 832
 833         ret = submit_lookup_cmds(submit, args, file);
 834         if (ret)
 835                 goto out;
 836
 837         /* copy_*_user while holding a ww ticket upsets lockdep */
 838         ww_acquire_init(&submit->ticket, &reservation_ww_class);
 839         has_ww_ticket = true;
 840         ret = submit_lock_objects(submit);
 841         if (ret)
 842                 goto out;
 843
 844         ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
 845         if (ret)
 846                 goto out;
 847
 848         ret = submit_pin_objects(submit);
 849         if (ret)
 850                 goto out;
 851
 852         for (i = 0; i < args->nr_cmds; i++) {
 853                 struct msm_gem_object *msm_obj;
 854                 uint64_t iova;
 855
 856                 ret = submit_bo(submit, submit->cmd[i].idx,
 857                                 &msm_obj, &iova, NULL);
 858                 if (ret)
 859                         goto out;
 860
 861                 if (!submit->cmd[i].size ||
 862                         ((submit->cmd[i].size + submit->cmd[i].offset) >
 863                                 msm_obj->base.size / 4)) {
 864                         DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4);
 865                         ret = -EINVAL;
 866                         goto out;
 867                 }
 868
 869                 submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4);
 870
 871                 if (submit->valid)
 872                         continue;
 873
 874                 ret = submit_reloc(submit, msm_obj, submit->cmd[i].offset * 4,
 875                                 submit->cmd[i].nr_relocs, submit->cmd[i].relocs);
 876                 if (ret)
 877                         goto out;
 878         }
 879
 880         submit->nr_cmds = i;
 881
 882         submit->user_fence = dma_fence_get(&submit->base.s_fence->finished);
 883
 884         /*
 885          * Allocate an id which can be used by WAIT_FENCE ioctl to map back
 886          * to the underlying fence.
 887          */
 888         submit->fence_id = idr_alloc_cyclic(&queue->fence_idr,
 889                         submit->user_fence, 0, INT_MAX, GFP_KERNEL);
 890         if (submit->fence_id < 0) {
 891                 ret = submit->fence_id = 0;
 892                 submit->fence_id = 0;
 893                 goto out;
 894         }
 895
 896         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 897                 struct sync_file *sync_file = sync_file_create(submit->user_fence);
 898                 if (!sync_file) {
 899                         ret = -ENOMEM;
 900                         goto out;
 901                 }
 902                 fd_install(out_fence_fd, sync_file->file);
 903                 args->fence_fd = out_fence_fd;
 904         }
 905
 906         submit_attach_object_fences(submit);
 907
 908         /* The scheduler owns a ref now: */
 909         msm_gem_submit_get(submit);
 910
 911         drm_sched_entity_push_job(&submit->base, queue->entity);
 912
 913         args->fence = submit->fence_id;
 914
 915         msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
 916         msm_process_post_deps(post_deps, args->nr_out_syncobjs,
 917                               submit->user_fence);
 918
 919
 920 out:
 921         submit_cleanup(submit, !!ret);
 922         if (has_ww_ticket)
 923                 ww_acquire_fini(&submit->ticket);
 924 out_unlock:
 925         if (ret && (out_fence_fd >= 0))
 926                 put_unused_fd(out_fence_fd);
 927         mutex_unlock(&queue->lock);
 928         if (submit)
 929                 msm_gem_submit_put(submit);
 930 out_post_unlock:
 931         if (!IS_ERR_OR_NULL(post_deps)) {
 932                 for (i = 0; i < args->nr_out_syncobjs; ++i) {
 933                         kfree(post_deps[i].chain);
 934                         drm_syncobj_put(post_deps[i].syncobj);
 935                 }
 936                 kfree(post_deps);
 937         }
 938
 939         if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
 940                 for (i = 0; i < args->nr_in_syncobjs; ++i) {
 941                         if (syncobjs_to_reset[i])
 942                                 drm_syncobj_put(syncobjs_to_reset[i]);
 943                 }
 944                 kfree(syncobjs_to_reset);
 945         }
 946
 947         return ret;
 948 }