drivers/gpu/drm/v3d/v3d_gem.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* Copyright (C) 2014-2018 Broadcom */
   3
   4 #include <linux/device.h>
   5 #include <linux/dma-mapping.h>
   6 #include <linux/io.h>
   7 #include <linux/module.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/reset.h>
  10 #include <linux/sched/signal.h>
  11 #include <linux/uaccess.h>
  12
  13 #include <drm/drm_managed.h>
  14 #include <drm/drm_syncobj.h>
  15 #include <uapi/drm/v3d_drm.h>
  16
  17 #include "v3d_drv.h"
  18 #include "v3d_regs.h"
  19 #include "v3d_trace.h"
  20
  21 static void
  22 v3d_init_core(struct v3d_dev *v3d, int core)
  23 {
  24         /* Set OVRTMUOUT, which means that the texture sampler uniform
  25          * configuration's tmu output type field is used, instead of
  26          * using the hardware default behavior based on the texture
  27          * type.  If you want the default behavior, you can still put
  28          * "2" in the indirect texture state's output_type field.
  29          */
  30         if (v3d->ver < 40)
  31                 V3D_CORE_WRITE(core, V3D_CTL_MISCCFG, V3D_MISCCFG_OVRTMUOUT);
  32
  33         /* Whenever we flush the L2T cache, we always want to flush
  34          * the whole thing.
  35          */
  36         V3D_CORE_WRITE(core, V3D_CTL_L2TFLSTA, 0);
  37         V3D_CORE_WRITE(core, V3D_CTL_L2TFLEND, ~0);
  38 }
  39
  40 /* Sets invariant state for the HW. */
  41 static void
  42 v3d_init_hw_state(struct v3d_dev *v3d)
  43 {
  44         v3d_init_core(v3d, 0);
  45 }
  46
  47 static void
  48 v3d_idle_axi(struct v3d_dev *v3d, int core)
  49 {
  50         V3D_CORE_WRITE(core, V3D_GMP_CFG, V3D_GMP_CFG_STOP_REQ);
  51
  52         if (wait_for((V3D_CORE_READ(core, V3D_GMP_STATUS) &
  53                       (V3D_GMP_STATUS_RD_COUNT_MASK |
  54                        V3D_GMP_STATUS_WR_COUNT_MASK |
  55                        V3D_GMP_STATUS_CFG_BUSY)) == 0, 100)) {
  56                 DRM_ERROR("Failed to wait for safe GMP shutdown\n");
  57         }
  58 }
  59
  60 static void
  61 v3d_idle_gca(struct v3d_dev *v3d)
  62 {
  63         if (v3d->ver >= 41)
  64                 return;
  65
  66         V3D_GCA_WRITE(V3D_GCA_SAFE_SHUTDOWN, V3D_GCA_SAFE_SHUTDOWN_EN);
  67
  68         if (wait_for((V3D_GCA_READ(V3D_GCA_SAFE_SHUTDOWN_ACK) &
  69                       V3D_GCA_SAFE_SHUTDOWN_ACK_ACKED) ==
  70                      V3D_GCA_SAFE_SHUTDOWN_ACK_ACKED, 100)) {
  71                 DRM_ERROR("Failed to wait for safe GCA shutdown\n");
  72         }
  73 }
  74
  75 static void
  76 v3d_reset_by_bridge(struct v3d_dev *v3d)
  77 {
  78         int version = V3D_BRIDGE_READ(V3D_TOP_GR_BRIDGE_REVISION);
  79
  80         if (V3D_GET_FIELD(version, V3D_TOP_GR_BRIDGE_MAJOR) == 2) {
  81                 V3D_BRIDGE_WRITE(V3D_TOP_GR_BRIDGE_SW_INIT_0,
  82                                  V3D_TOP_GR_BRIDGE_SW_INIT_0_V3D_CLK_108_SW_INIT);
  83                 V3D_BRIDGE_WRITE(V3D_TOP_GR_BRIDGE_SW_INIT_0, 0);
  84
  85                 /* GFXH-1383: The SW_INIT may cause a stray write to address 0
  86                  * of the unit, so reset it to its power-on value here.
  87                  */
  88                 V3D_WRITE(V3D_HUB_AXICFG, V3D_HUB_AXICFG_MAX_LEN_MASK);
  89         } else {
  90                 WARN_ON_ONCE(V3D_GET_FIELD(version,
  91                                            V3D_TOP_GR_BRIDGE_MAJOR) != 7);
  92                 V3D_BRIDGE_WRITE(V3D_TOP_GR_BRIDGE_SW_INIT_1,
  93                                  V3D_TOP_GR_BRIDGE_SW_INIT_1_V3D_CLK_108_SW_INIT);
  94                 V3D_BRIDGE_WRITE(V3D_TOP_GR_BRIDGE_SW_INIT_1, 0);
  95         }
  96 }
  97
  98 static void
  99 v3d_reset_v3d(struct v3d_dev *v3d)
 100 {
 101         if (v3d->reset)
 102                 reset_control_reset(v3d->reset);
 103         else
 104                 v3d_reset_by_bridge(v3d);
 105
 106         v3d_init_hw_state(v3d);
 107 }
 108
 109 void
 110 v3d_reset(struct v3d_dev *v3d)
 111 {
 112         struct drm_device *dev = &v3d->drm;
 113
 114         DRM_DEV_ERROR(dev->dev, "Resetting GPU for hang.\n");
 115         DRM_DEV_ERROR(dev->dev, "V3D_ERR_STAT: 0x%08x\n",
 116                       V3D_CORE_READ(0, V3D_ERR_STAT));
 117         trace_v3d_reset_begin(dev);
 118
 119         /* XXX: only needed for safe powerdown, not reset. */
 120         if (false)
 121                 v3d_idle_axi(v3d, 0);
 122
 123         v3d_idle_gca(v3d);
 124         v3d_reset_v3d(v3d);
 125
 126         v3d_mmu_set_page_table(v3d);
 127         v3d_irq_reset(v3d);
 128
 129         v3d_perfmon_stop(v3d, v3d->active_perfmon, false);
 130
 131         trace_v3d_reset_end(dev);
 132 }
 133
 134 static void
 135 v3d_flush_l3(struct v3d_dev *v3d)
 136 {
 137         if (v3d->ver < 41) {
 138                 u32 gca_ctrl = V3D_GCA_READ(V3D_GCA_CACHE_CTRL);
 139
 140                 V3D_GCA_WRITE(V3D_GCA_CACHE_CTRL,
 141                               gca_ctrl | V3D_GCA_CACHE_CTRL_FLUSH);
 142
 143                 if (v3d->ver < 33) {
 144                         V3D_GCA_WRITE(V3D_GCA_CACHE_CTRL,
 145                                       gca_ctrl & ~V3D_GCA_CACHE_CTRL_FLUSH);
 146                 }
 147         }
 148 }
 149
 150 /* Invalidates the (read-only) L2C cache.  This was the L2 cache for
 151  * uniforms and instructions on V3D 3.2.
 152  */
 153 static void
 154 v3d_invalidate_l2c(struct v3d_dev *v3d, int core)
 155 {
 156         if (v3d->ver > 32)
 157                 return;
 158
 159         V3D_CORE_WRITE(core, V3D_CTL_L2CACTL,
 160                        V3D_L2CACTL_L2CCLR |
 161                        V3D_L2CACTL_L2CENA);
 162 }
 163
 164 /* Invalidates texture L2 cachelines */
 165 static void
 166 v3d_flush_l2t(struct v3d_dev *v3d, int core)
 167 {
 168         /* While there is a busy bit (V3D_L2TCACTL_L2TFLS), we don't
 169          * need to wait for completion before dispatching the job --
 170          * L2T accesses will be stalled until the flush has completed.
 171          * However, we do need to make sure we don't try to trigger a
 172          * new flush while the L2_CLEAN queue is trying to
 173          * synchronously clean after a job.
 174          */
 175         mutex_lock(&v3d->cache_clean_lock);
 176         V3D_CORE_WRITE(core, V3D_CTL_L2TCACTL,
 177                        V3D_L2TCACTL_L2TFLS |
 178                        V3D_SET_FIELD(V3D_L2TCACTL_FLM_FLUSH, V3D_L2TCACTL_FLM));
 179         mutex_unlock(&v3d->cache_clean_lock);
 180 }
 181
 182 /* Cleans texture L1 and L2 cachelines (writing back dirty data).
 183  *
 184  * For cleaning, which happens from the CACHE_CLEAN queue after CSD has
 185  * executed, we need to make sure that the clean is done before
 186  * signaling job completion.  So, we synchronously wait before
 187  * returning, and we make sure that L2 invalidates don't happen in the
 188  * meantime to confuse our are-we-done checks.
 189  */
 190 void
 191 v3d_clean_caches(struct v3d_dev *v3d)
 192 {
 193         struct drm_device *dev = &v3d->drm;
 194         int core = 0;
 195
 196         trace_v3d_cache_clean_begin(dev);
 197
 198         V3D_CORE_WRITE(core, V3D_CTL_L2TCACTL, V3D_L2TCACTL_TMUWCF);
 199         if (wait_for(!(V3D_CORE_READ(core, V3D_CTL_L2TCACTL) &
 200                        V3D_L2TCACTL_TMUWCF), 100)) {
 201                 DRM_ERROR("Timeout waiting for TMU write combiner flush\n");
 202         }
 203
 204         mutex_lock(&v3d->cache_clean_lock);
 205         V3D_CORE_WRITE(core, V3D_CTL_L2TCACTL,
 206                        V3D_L2TCACTL_L2TFLS |
 207                        V3D_SET_FIELD(V3D_L2TCACTL_FLM_CLEAN, V3D_L2TCACTL_FLM));
 208
 209         if (wait_for(!(V3D_CORE_READ(core, V3D_CTL_L2TCACTL) &
 210                        V3D_L2TCACTL_L2TFLS), 100)) {
 211                 DRM_ERROR("Timeout waiting for L2T clean\n");
 212         }
 213
 214         mutex_unlock(&v3d->cache_clean_lock);
 215
 216         trace_v3d_cache_clean_end(dev);
 217 }
 218
 219 /* Invalidates the slice caches.  These are read-only caches. */
 220 static void
 221 v3d_invalidate_slices(struct v3d_dev *v3d, int core)
 222 {
 223         V3D_CORE_WRITE(core, V3D_CTL_SLCACTL,
 224                        V3D_SET_FIELD(0xf, V3D_SLCACTL_TVCCS) |
 225                        V3D_SET_FIELD(0xf, V3D_SLCACTL_TDCCS) |
 226                        V3D_SET_FIELD(0xf, V3D_SLCACTL_UCC) |
 227                        V3D_SET_FIELD(0xf, V3D_SLCACTL_ICC));
 228 }
 229
 230 void
 231 v3d_invalidate_caches(struct v3d_dev *v3d)
 232 {
 233         /* Invalidate the caches from the outside in.  That way if
 234          * another CL's concurrent use of nearby memory were to pull
 235          * an invalidated cacheline back in, we wouldn't leave stale
 236          * data in the inner cache.
 237          */
 238         v3d_flush_l3(v3d);
 239         v3d_invalidate_l2c(v3d, 0);
 240         v3d_flush_l2t(v3d, 0);
 241         v3d_invalidate_slices(v3d, 0);
 242 }
 243
 244 /* Takes the reservation lock on all the BOs being referenced, so that
 245  * at queue submit time we can update the reservations.
 246  *
 247  * We don't lock the RCL the tile alloc/state BOs, or overflow memory
 248  * (all of which are on exec->unref_list).  They're entirely private
 249  * to v3d, so we don't attach dma-buf fences to them.
 250  */
 251 static int
 252 v3d_lock_bo_reservations(struct v3d_job *job,
 253                          struct ww_acquire_ctx *acquire_ctx)
 254 {
 255         int i, ret;
 256
 257         ret = drm_gem_lock_reservations(job->bo, job->bo_count, acquire_ctx);
 258         if (ret)
 259                 return ret;
 260
 261         for (i = 0; i < job->bo_count; i++) {
 262                 ret = dma_resv_reserve_fences(job->bo[i]->resv, 1);
 263                 if (ret)
 264                         goto fail;
 265
 266                 ret = drm_sched_job_add_implicit_dependencies(&job->base,
 267                                                               job->bo[i], true);
 268                 if (ret)
 269                         goto fail;
 270         }
 271
 272         return 0;
 273
 274 fail:
 275         drm_gem_unlock_reservations(job->bo, job->bo_count, acquire_ctx);
 276         return ret;
 277 }
 278
 279 /**
 280  * v3d_lookup_bos() - Sets up job->bo[] with the GEM objects
 281  * referenced by the job.
 282  * @dev: DRM device
 283  * @file_priv: DRM file for this fd
 284  * @job: V3D job being set up
 285  * @bo_handles: GEM handles
 286  * @bo_count: Number of GEM handles passed in
 287  *
 288  * The command validator needs to reference BOs by their index within
 289  * the submitted job's BO list.  This does the validation of the job's
 290  * BO list and reference counting for the lifetime of the job.
 291  *
 292  * Note that this function doesn't need to unreference the BOs on
 293  * failure, because that will happen at v3d_exec_cleanup() time.
 294  */
 295 static int
 296 v3d_lookup_bos(struct drm_device *dev,
 297                struct drm_file *file_priv,
 298                struct v3d_job *job,
 299                u64 bo_handles,
 300                u32 bo_count)
 301 {
 302         job->bo_count = bo_count;
 303
 304         if (!job->bo_count) {
 305                 /* See comment on bo_index for why we have to check
 306                  * this.
 307                  */
 308                 DRM_DEBUG("Rendering requires BOs\n");
 309                 return -EINVAL;
 310         }
 311
 312         return drm_gem_objects_lookup(file_priv,
 313                                       (void __user *)(uintptr_t)bo_handles,
 314                                       job->bo_count, &job->bo);
 315 }
 316
 317 static void
 318 v3d_job_free(struct kref *ref)
 319 {
 320         struct v3d_job *job = container_of(ref, struct v3d_job, refcount);
 321         int i;
 322
 323         if (job->bo) {
 324                 for (i = 0; i < job->bo_count; i++)
 325                         drm_gem_object_put(job->bo[i]);
 326                 kvfree(job->bo);
 327         }
 328
 329         dma_fence_put(job->irq_fence);
 330         dma_fence_put(job->done_fence);
 331
 332         if (job->perfmon)
 333                 v3d_perfmon_put(job->perfmon);
 334
 335         kfree(job);
 336 }
 337
 338 static void
 339 v3d_render_job_free(struct kref *ref)
 340 {
 341         struct v3d_render_job *job = container_of(ref, struct v3d_render_job,
 342                                                   base.refcount);
 343         struct v3d_bo *bo, *save;
 344
 345         list_for_each_entry_safe(bo, save, &job->unref_list, unref_head) {
 346                 drm_gem_object_put(&bo->base.base);
 347         }
 348
 349         v3d_job_free(ref);
 350 }
 351
 352 void v3d_job_cleanup(struct v3d_job *job)
 353 {
 354         if (!job)
 355                 return;
 356
 357         drm_sched_job_cleanup(&job->base);
 358         v3d_job_put(job);
 359 }
 360
 361 void v3d_job_put(struct v3d_job *job)
 362 {
 363         kref_put(&job->refcount, job->free);
 364 }
 365
 366 int
 367 v3d_wait_bo_ioctl(struct drm_device *dev, void *data,
 368                   struct drm_file *file_priv)
 369 {
 370         int ret;
 371         struct drm_v3d_wait_bo *args = data;
 372         ktime_t start = ktime_get();
 373         u64 delta_ns;
 374         unsigned long timeout_jiffies =
 375                 nsecs_to_jiffies_timeout(args->timeout_ns);
 376
 377         if (args->pad != 0)
 378                 return -EINVAL;
 379
 380         ret = drm_gem_dma_resv_wait(file_priv, args->handle,
 381                                     true, timeout_jiffies);
 382
 383         /* Decrement the user's timeout, in case we got interrupted
 384          * such that the ioctl will be restarted.
 385          */
 386         delta_ns = ktime_to_ns(ktime_sub(ktime_get(), start));
 387         if (delta_ns < args->timeout_ns)
 388                 args->timeout_ns -= delta_ns;
 389         else
 390                 args->timeout_ns = 0;
 391
 392         /* Asked to wait beyond the jiffie/scheduler precision? */
 393         if (ret == -ETIME && args->timeout_ns)
 394                 ret = -EAGAIN;
 395
 396         return ret;
 397 }
 398
 399 static int
 400 v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,
 401              void **container, size_t size, void (*free)(struct kref *ref),
 402              u32 in_sync, struct v3d_submit_ext *se, enum v3d_queue queue)
 403 {
 404         struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 405         struct v3d_job *job;
 406         bool has_multisync = se && (se->flags & DRM_V3D_EXT_ID_MULTI_SYNC);
 407         int ret, i;
 408
 409         *container = kcalloc(1, size, GFP_KERNEL);
 410         if (!*container) {
 411                 DRM_ERROR("Cannot allocate memory for v3d job.");
 412                 return -ENOMEM;
 413         }
 414
 415         job = *container;
 416         job->v3d = v3d;
 417         job->free = free;
 418
 419         ret = drm_sched_job_init(&job->base, &v3d_priv->sched_entity[queue],
 420                                  v3d_priv);
 421         if (ret)
 422                 goto fail;
 423
 424         if (has_multisync) {
 425                 if (se->in_sync_count && se->wait_stage == queue) {
 426                         struct drm_v3d_sem __user *handle = u64_to_user_ptr(se->in_syncs);
 427
 428                         for (i = 0; i < se->in_sync_count; i++) {
 429                                 struct drm_v3d_sem in;
 430
 431                                 if (copy_from_user(&in, handle++, sizeof(in))) {
 432                                         ret = -EFAULT;
 433                                         DRM_DEBUG("Failed to copy wait dep handle.\n");
 434                                         goto fail_deps;
 435                                 }
 436                                 ret = drm_sched_job_add_syncobj_dependency(&job->base, file_priv, in.handle, 0);
 437
 438                                 // TODO: Investigate why this was filtered out for the IOCTL.
 439                                 if (ret && ret != -ENOENT)
 440                                         goto fail_deps;
 441                         }
 442                 }
 443         } else {
 444                 ret = drm_sched_job_add_syncobj_dependency(&job->base, file_priv, in_sync, 0);
 445
 446                 // TODO: Investigate why this was filtered out for the IOCTL.
 447                 if (ret && ret != -ENOENT)
 448                         goto fail_deps;
 449         }
 450
 451         kref_init(&job->refcount);
 452
 453         return 0;
 454
 455 fail_deps:
 456         drm_sched_job_cleanup(&job->base);
 457 fail:
 458         kfree(*container);
 459         *container = NULL;
 460
 461         return ret;
 462 }
 463
 464 static void
 465 v3d_push_job(struct v3d_job *job)
 466 {
 467         drm_sched_job_arm(&job->base);
 468
 469         job->done_fence = dma_fence_get(&job->base.s_fence->finished);
 470
 471         /* put by scheduler job completion */
 472         kref_get(&job->refcount);
 473
 474         drm_sched_entity_push_job(&job->base);
 475 }
 476
 477 static void
 478 v3d_attach_fences_and_unlock_reservation(struct drm_file *file_priv,
 479                                          struct v3d_job *job,
 480                                          struct ww_acquire_ctx *acquire_ctx,
 481                                          u32 out_sync,
 482                                          struct v3d_submit_ext *se,
 483                                          struct dma_fence *done_fence)
 484 {
 485         struct drm_syncobj *sync_out;
 486         bool has_multisync = se && (se->flags & DRM_V3D_EXT_ID_MULTI_SYNC);
 487         int i;
 488
 489         for (i = 0; i < job->bo_count; i++) {
 490                 /* XXX: Use shared fences for read-only objects. */
 491                 dma_resv_add_fence(job->bo[i]->resv, job->done_fence,
 492                                    DMA_RESV_USAGE_WRITE);
 493         }
 494
 495         drm_gem_unlock_reservations(job->bo, job->bo_count, acquire_ctx);
 496
 497         /* Update the return sync object for the job */
 498         /* If it only supports a single signal semaphore*/
 499         if (!has_multisync) {
 500                 sync_out = drm_syncobj_find(file_priv, out_sync);
 501                 if (sync_out) {
 502                         drm_syncobj_replace_fence(sync_out, done_fence);
 503                         drm_syncobj_put(sync_out);
 504                 }
 505                 return;
 506         }
 507
 508         /* If multiple semaphores extension is supported */
 509         if (se->out_sync_count) {
 510                 for (i = 0; i < se->out_sync_count; i++) {
 511                         drm_syncobj_replace_fence(se->out_syncs[i].syncobj,
 512                                                   done_fence);
 513                         drm_syncobj_put(se->out_syncs[i].syncobj);
 514                 }
 515                 kvfree(se->out_syncs);
 516         }
 517 }
 518
 519 static void
 520 v3d_put_multisync_post_deps(struct v3d_submit_ext *se)
 521 {
 522         unsigned int i;
 523
 524         if (!(se && se->out_sync_count))
 525                 return;
 526
 527         for (i = 0; i < se->out_sync_count; i++)
 528                 drm_syncobj_put(se->out_syncs[i].syncobj);
 529         kvfree(se->out_syncs);
 530 }
 531
 532 static int
 533 v3d_get_multisync_post_deps(struct drm_file *file_priv,
 534                             struct v3d_submit_ext *se,
 535                             u32 count, u64 handles)
 536 {
 537         struct drm_v3d_sem __user *post_deps;
 538         int i, ret;
 539
 540         if (!count)
 541                 return 0;
 542
 543         se->out_syncs = (struct v3d_submit_outsync *)
 544                         kvmalloc_array(count,
 545                                        sizeof(struct v3d_submit_outsync),
 546                                        GFP_KERNEL);
 547         if (!se->out_syncs)
 548                 return -ENOMEM;
 549
 550         post_deps = u64_to_user_ptr(handles);
 551
 552         for (i = 0; i < count; i++) {
 553                 struct drm_v3d_sem out;
 554
 555                 if (copy_from_user(&out, post_deps++, sizeof(out))) {
 556                         ret = -EFAULT;
 557                         DRM_DEBUG("Failed to copy post dep handles\n");
 558                         goto fail;
 559                 }
 560
 561                 se->out_syncs[i].syncobj = drm_syncobj_find(file_priv,
 562                                                             out.handle);
 563                 if (!se->out_syncs[i].syncobj) {
 564                         ret = -EINVAL;
 565                         goto fail;
 566                 }
 567         }
 568         se->out_sync_count = count;
 569
 570         return 0;
 571
 572 fail:
 573         for (i--; i >= 0; i--)
 574                 drm_syncobj_put(se->out_syncs[i].syncobj);
 575         kvfree(se->out_syncs);
 576
 577         return ret;
 578 }
 579
 580 /* Get data for multiple binary semaphores synchronization. Parse syncobj
 581  * to be signaled when job completes (out_sync).
 582  */
 583 static int
 584 v3d_get_multisync_submit_deps(struct drm_file *file_priv,
 585                               struct drm_v3d_extension __user *ext,
 586                               void *data)
 587 {
 588         struct drm_v3d_multi_sync multisync;
 589         struct v3d_submit_ext *se = data;
 590         int ret;
 591
 592         if (copy_from_user(&multisync, ext, sizeof(multisync)))
 593                 return -EFAULT;
 594
 595         if (multisync.pad)
 596                 return -EINVAL;
 597
 598         ret = v3d_get_multisync_post_deps(file_priv, data, multisync.out_sync_count,
 599                                           multisync.out_syncs);
 600         if (ret)
 601                 return ret;
 602
 603         se->in_sync_count = multisync.in_sync_count;
 604         se->in_syncs = multisync.in_syncs;
 605         se->flags |= DRM_V3D_EXT_ID_MULTI_SYNC;
 606         se->wait_stage = multisync.wait_stage;
 607
 608         return 0;
 609 }
 610
 611 /* Whenever userspace sets ioctl extensions, v3d_get_extensions parses data
 612  * according to the extension id (name).
 613  */
 614 static int
 615 v3d_get_extensions(struct drm_file *file_priv,
 616                    u64 ext_handles,
 617                    void *data)
 618 {
 619         struct drm_v3d_extension __user *user_ext;
 620         int ret;
 621
 622         user_ext = u64_to_user_ptr(ext_handles);
 623         while (user_ext) {
 624                 struct drm_v3d_extension ext;
 625
 626                 if (copy_from_user(&ext, user_ext, sizeof(ext))) {
 627                         DRM_DEBUG("Failed to copy submit extension\n");
 628                         return -EFAULT;
 629                 }
 630
 631                 switch (ext.id) {
 632                 case DRM_V3D_EXT_ID_MULTI_SYNC:
 633                         ret = v3d_get_multisync_submit_deps(file_priv, user_ext, data);
 634                         if (ret)
 635                                 return ret;
 636                         break;
 637                 default:
 638                         DRM_DEBUG_DRIVER("Unknown extension id: %d\n", ext.id);
 639                         return -EINVAL;
 640                 }
 641
 642                 user_ext = u64_to_user_ptr(ext.next);
 643         }
 644
 645         return 0;
 646 }
 647
 648 /**
 649  * v3d_submit_cl_ioctl() - Submits a job (frame) to the V3D.
 650  * @dev: DRM device
 651  * @data: ioctl argument
 652  * @file_priv: DRM file for this fd
 653  *
 654  * This is the main entrypoint for userspace to submit a 3D frame to
 655  * the GPU.  Userspace provides the binner command list (if
 656  * applicable), and the kernel sets up the render command list to draw
 657  * to the framebuffer described in the ioctl, using the command lists
 658  * that the 3D engine's binner will produce.
 659  */
 660 int
 661 v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 662                     struct drm_file *file_priv)
 663 {
 664         struct v3d_dev *v3d = to_v3d_dev(dev);
 665         struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 666         struct drm_v3d_submit_cl *args = data;
 667         struct v3d_submit_ext se = {0};
 668         struct v3d_bin_job *bin = NULL;
 669         struct v3d_render_job *render = NULL;
 670         struct v3d_job *clean_job = NULL;
 671         struct v3d_job *last_job;
 672         struct ww_acquire_ctx acquire_ctx;
 673         int ret = 0;
 674
 675         trace_v3d_submit_cl_ioctl(&v3d->drm, args->rcl_start, args->rcl_end);
 676
 677         if (args->pad)
 678                 return -EINVAL;
 679
 680         if (args->flags &&
 681             args->flags & ~(DRM_V3D_SUBMIT_CL_FLUSH_CACHE |
 682                             DRM_V3D_SUBMIT_EXTENSION)) {
 683                 DRM_INFO("invalid flags: %d\n", args->flags);
 684                 return -EINVAL;
 685         }
 686
 687         if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
 688                 ret = v3d_get_extensions(file_priv, args->extensions, &se);
 689                 if (ret) {
 690                         DRM_DEBUG("Failed to get extensions.\n");
 691                         return ret;
 692                 }
 693         }
 694
 695         ret = v3d_job_init(v3d, file_priv, (void *)&render, sizeof(*render),
 696                            v3d_render_job_free, args->in_sync_rcl, &se, V3D_RENDER);
 697         if (ret)
 698                 goto fail;
 699
 700         render->start = args->rcl_start;
 701         render->end = args->rcl_end;
 702         INIT_LIST_HEAD(&render->unref_list);
 703
 704         if (args->bcl_start != args->bcl_end) {
 705                 ret = v3d_job_init(v3d, file_priv, (void *)&bin, sizeof(*bin),
 706                                    v3d_job_free, args->in_sync_bcl, &se, V3D_BIN);
 707                 if (ret)
 708                         goto fail;
 709
 710                 bin->start = args->bcl_start;
 711                 bin->end = args->bcl_end;
 712                 bin->qma = args->qma;
 713                 bin->qms = args->qms;
 714                 bin->qts = args->qts;
 715                 bin->render = render;
 716         }
 717
 718         if (args->flags & DRM_V3D_SUBMIT_CL_FLUSH_CACHE) {
 719                 ret = v3d_job_init(v3d, file_priv, (void *)&clean_job, sizeof(*clean_job),
 720                                    v3d_job_free, 0, NULL, V3D_CACHE_CLEAN);
 721                 if (ret)
 722                         goto fail;
 723
 724                 last_job = clean_job;
 725         } else {
 726                 last_job = &render->base;
 727         }
 728
 729         ret = v3d_lookup_bos(dev, file_priv, last_job,
 730                              args->bo_handles, args->bo_handle_count);
 731         if (ret)
 732                 goto fail;
 733
 734         ret = v3d_lock_bo_reservations(last_job, &acquire_ctx);
 735         if (ret)
 736                 goto fail;
 737
 738         if (args->perfmon_id) {
 739                 render->base.perfmon = v3d_perfmon_find(v3d_priv,
 740                                                         args->perfmon_id);
 741
 742                 if (!render->base.perfmon) {
 743                         ret = -ENOENT;
 744                         goto fail_perfmon;
 745                 }
 746         }
 747
 748         mutex_lock(&v3d->sched_lock);
 749         if (bin) {
 750                 bin->base.perfmon = render->base.perfmon;
 751                 v3d_perfmon_get(bin->base.perfmon);
 752                 v3d_push_job(&bin->base);
 753
 754                 ret = drm_sched_job_add_dependency(&render->base.base,
 755                                                    dma_fence_get(bin->base.done_fence));
 756                 if (ret)
 757                         goto fail_unreserve;
 758         }
 759
 760         v3d_push_job(&render->base);
 761
 762         if (clean_job) {
 763                 struct dma_fence *render_fence =
 764                         dma_fence_get(render->base.done_fence);
 765                 ret = drm_sched_job_add_dependency(&clean_job->base,
 766                                                    render_fence);
 767                 if (ret)
 768                         goto fail_unreserve;
 769                 clean_job->perfmon = render->base.perfmon;
 770                 v3d_perfmon_get(clean_job->perfmon);
 771                 v3d_push_job(clean_job);
 772         }
 773
 774         mutex_unlock(&v3d->sched_lock);
 775
 776         v3d_attach_fences_and_unlock_reservation(file_priv,
 777                                                  last_job,
 778                                                  &acquire_ctx,
 779                                                  args->out_sync,
 780                                                  &se,
 781                                                  last_job->done_fence);
 782
 783         if (bin)
 784                 v3d_job_put(&bin->base);
 785         v3d_job_put(&render->base);
 786         if (clean_job)
 787                 v3d_job_put(clean_job);
 788
 789         return 0;
 790
 791 fail_unreserve:
 792         mutex_unlock(&v3d->sched_lock);
 793 fail_perfmon:
 794         drm_gem_unlock_reservations(last_job->bo,
 795                                     last_job->bo_count, &acquire_ctx);
 796 fail:
 797         v3d_job_cleanup((void *)bin);
 798         v3d_job_cleanup((void *)render);
 799         v3d_job_cleanup(clean_job);
 800         v3d_put_multisync_post_deps(&se);
 801
 802         return ret;
 803 }
 804
 805 /**
 806  * v3d_submit_tfu_ioctl() - Submits a TFU (texture formatting) job to the V3D.
 807  * @dev: DRM device
 808  * @data: ioctl argument
 809  * @file_priv: DRM file for this fd
 810  *
 811  * Userspace provides the register setup for the TFU, which we don't
 812  * need to validate since the TFU is behind the MMU.
 813  */
 814 int
 815 v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
 816                      struct drm_file *file_priv)
 817 {
 818         struct v3d_dev *v3d = to_v3d_dev(dev);
 819         struct drm_v3d_submit_tfu *args = data;
 820         struct v3d_submit_ext se = {0};
 821         struct v3d_tfu_job *job = NULL;
 822         struct ww_acquire_ctx acquire_ctx;
 823         int ret = 0;
 824
 825         trace_v3d_submit_tfu_ioctl(&v3d->drm, args->iia);
 826
 827         if (args->flags && !(args->flags & DRM_V3D_SUBMIT_EXTENSION)) {
 828                 DRM_DEBUG("invalid flags: %d\n", args->flags);
 829                 return -EINVAL;
 830         }
 831
 832         if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
 833                 ret = v3d_get_extensions(file_priv, args->extensions, &se);
 834                 if (ret) {
 835                         DRM_DEBUG("Failed to get extensions.\n");
 836                         return ret;
 837                 }
 838         }
 839
 840         ret = v3d_job_init(v3d, file_priv, (void *)&job, sizeof(*job),
 841                            v3d_job_free, args->in_sync, &se, V3D_TFU);
 842         if (ret)
 843                 goto fail;
 844
 845         job->base.bo = kcalloc(ARRAY_SIZE(args->bo_handles),
 846                                sizeof(*job->base.bo), GFP_KERNEL);
 847         if (!job->base.bo) {
 848                 ret = -ENOMEM;
 849                 goto fail;
 850         }
 851
 852         job->args = *args;
 853
 854         for (job->base.bo_count = 0;
 855              job->base.bo_count < ARRAY_SIZE(args->bo_handles);
 856              job->base.bo_count++) {
 857                 struct drm_gem_object *bo;
 858
 859                 if (!args->bo_handles[job->base.bo_count])
 860                         break;
 861
 862                 bo = drm_gem_object_lookup(file_priv, args->bo_handles[job->base.bo_count]);
 863                 if (!bo) {
 864                         DRM_DEBUG("Failed to look up GEM BO %d: %d\n",
 865                                   job->base.bo_count,
 866                                   args->bo_handles[job->base.bo_count]);
 867                         ret = -ENOENT;
 868                         goto fail;
 869                 }
 870                 job->base.bo[job->base.bo_count] = bo;
 871         }
 872
 873         ret = v3d_lock_bo_reservations(&job->base, &acquire_ctx);
 874         if (ret)
 875                 goto fail;
 876
 877         mutex_lock(&v3d->sched_lock);
 878         v3d_push_job(&job->base);
 879         mutex_unlock(&v3d->sched_lock);
 880
 881         v3d_attach_fences_and_unlock_reservation(file_priv,
 882                                                  &job->base, &acquire_ctx,
 883                                                  args->out_sync,
 884                                                  &se,
 885                                                  job->base.done_fence);
 886
 887         v3d_job_put(&job->base);
 888
 889         return 0;
 890
 891 fail:
 892         v3d_job_cleanup((void *)job);
 893         v3d_put_multisync_post_deps(&se);
 894
 895         return ret;
 896 }
 897
 898 /**
 899  * v3d_submit_csd_ioctl() - Submits a CSD (texture formatting) job to the V3D.
 900  * @dev: DRM device
 901  * @data: ioctl argument
 902  * @file_priv: DRM file for this fd
 903  *
 904  * Userspace provides the register setup for the CSD, which we don't
 905  * need to validate since the CSD is behind the MMU.
 906  */
 907 int
 908 v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
 909                      struct drm_file *file_priv)
 910 {
 911         struct v3d_dev *v3d = to_v3d_dev(dev);
 912         struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 913         struct drm_v3d_submit_csd *args = data;
 914         struct v3d_submit_ext se = {0};
 915         struct v3d_csd_job *job = NULL;
 916         struct v3d_job *clean_job = NULL;
 917         struct ww_acquire_ctx acquire_ctx;
 918         int ret;
 919
 920         trace_v3d_submit_csd_ioctl(&v3d->drm, args->cfg[5], args->cfg[6]);
 921
 922         if (args->pad)
 923                 return -EINVAL;
 924
 925         if (!v3d_has_csd(v3d)) {
 926                 DRM_DEBUG("Attempting CSD submit on non-CSD hardware\n");
 927                 return -EINVAL;
 928         }
 929
 930         if (args->flags && !(args->flags & DRM_V3D_SUBMIT_EXTENSION)) {
 931                 DRM_INFO("invalid flags: %d\n", args->flags);
 932                 return -EINVAL;
 933         }
 934
 935         if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
 936                 ret = v3d_get_extensions(file_priv, args->extensions, &se);
 937                 if (ret) {
 938                         DRM_DEBUG("Failed to get extensions.\n");
 939                         return ret;
 940                 }
 941         }
 942
 943         ret = v3d_job_init(v3d, file_priv, (void *)&job, sizeof(*job),
 944                            v3d_job_free, args->in_sync, &se, V3D_CSD);
 945         if (ret)
 946                 goto fail;
 947
 948         ret = v3d_job_init(v3d, file_priv, (void *)&clean_job, sizeof(*clean_job),
 949                            v3d_job_free, 0, NULL, V3D_CACHE_CLEAN);
 950         if (ret)
 951                 goto fail;
 952
 953         job->args = *args;
 954
 955         ret = v3d_lookup_bos(dev, file_priv, clean_job,
 956                              args->bo_handles, args->bo_handle_count);
 957         if (ret)
 958                 goto fail;
 959
 960         ret = v3d_lock_bo_reservations(clean_job, &acquire_ctx);
 961         if (ret)
 962                 goto fail;
 963
 964         if (args->perfmon_id) {
 965                 job->base.perfmon = v3d_perfmon_find(v3d_priv,
 966                                                      args->perfmon_id);
 967                 if (!job->base.perfmon) {
 968                         ret = -ENOENT;
 969                         goto fail_perfmon;
 970                 }
 971         }
 972
 973         mutex_lock(&v3d->sched_lock);
 974         v3d_push_job(&job->base);
 975
 976         ret = drm_sched_job_add_dependency(&clean_job->base,
 977                                            dma_fence_get(job->base.done_fence));
 978         if (ret)
 979                 goto fail_unreserve;
 980
 981         v3d_push_job(clean_job);
 982         mutex_unlock(&v3d->sched_lock);
 983
 984         v3d_attach_fences_and_unlock_reservation(file_priv,
 985                                                  clean_job,
 986                                                  &acquire_ctx,
 987                                                  args->out_sync,
 988                                                  &se,
 989                                                  clean_job->done_fence);
 990
 991         v3d_job_put(&job->base);
 992         v3d_job_put(clean_job);
 993
 994         return 0;
 995
 996 fail_unreserve:
 997         mutex_unlock(&v3d->sched_lock);
 998 fail_perfmon:
 999         drm_gem_unlock_reservations(clean_job->bo, clean_job->bo_count,
1000                                     &acquire_ctx);
1001 fail:
1002         v3d_job_cleanup((void *)job);
1003         v3d_job_cleanup(clean_job);
1004         v3d_put_multisync_post_deps(&se);
1005
1006         return ret;
1007 }
1008
1009 int
1010 v3d_gem_init(struct drm_device *dev)
1011 {
1012         struct v3d_dev *v3d = to_v3d_dev(dev);
1013         u32 pt_size = 4096 * 1024;
1014         int ret, i;
1015
1016         for (i = 0; i < V3D_MAX_QUEUES; i++)
1017                 v3d->queue[i].fence_context = dma_fence_context_alloc(1);
1018
1019         spin_lock_init(&v3d->mm_lock);
1020         spin_lock_init(&v3d->job_lock);
1021         ret = drmm_mutex_init(dev, &v3d->bo_lock);
1022         if (ret)
1023                 return ret;
1024         ret = drmm_mutex_init(dev, &v3d->reset_lock);
1025         if (ret)
1026                 return ret;
1027         ret = drmm_mutex_init(dev, &v3d->sched_lock);
1028         if (ret)
1029                 return ret;
1030         ret = drmm_mutex_init(dev, &v3d->cache_clean_lock);
1031         if (ret)
1032                 return ret;
1033
1034         /* Note: We don't allocate address 0.  Various bits of HW
1035          * treat 0 as special, such as the occlusion query counters
1036          * where 0 means "disabled".
1037          */
1038         drm_mm_init(&v3d->mm, 1, pt_size / sizeof(u32) - 1);
1039
1040         v3d->pt = dma_alloc_wc(v3d->drm.dev, pt_size,
1041                                &v3d->pt_paddr,
1042                                GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO);
1043         if (!v3d->pt) {
1044                 drm_mm_takedown(&v3d->mm);
1045                 dev_err(v3d->drm.dev,
1046                         "Failed to allocate page tables. Please ensure you have DMA enabled.\n");
1047                 return -ENOMEM;
1048         }
1049
1050         v3d_init_hw_state(v3d);
1051         v3d_mmu_set_page_table(v3d);
1052
1053         ret = v3d_sched_init(v3d);
1054         if (ret) {
1055                 drm_mm_takedown(&v3d->mm);
1056                 dma_free_coherent(v3d->drm.dev, 4096 * 1024, (void *)v3d->pt,
1057                                   v3d->pt_paddr);
1058         }
1059
1060         return 0;
1061 }
1062
1063 void
1064 v3d_gem_destroy(struct drm_device *dev)
1065 {
1066         struct v3d_dev *v3d = to_v3d_dev(dev);
1067
1068         v3d_sched_fini(v3d);
1069
1070         /* Waiting for jobs to finish would need to be done before
1071          * unregistering V3D.
1072          */
1073         WARN_ON(v3d->bin_job);
1074         WARN_ON(v3d->render_job);
1075
1076         drm_mm_takedown(&v3d->mm);
1077
1078         dma_free_coherent(v3d->drm.dev, 4096 * 1024, (void *)v3d->pt,
1079                           v3d->pt_paddr);
1080 }