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/pm_runtime.h>
  10 #include <linux/reset.h>
  11 #include <linux/sched/signal.h>
  12 #include <linux/uaccess.h>
  13
  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         u32 *handles;
 303         int ret = 0;
 304         int i;
 305
 306         job->bo_count = bo_count;
 307
 308         if (!job->bo_count) {
 309                 /* See comment on bo_index for why we have to check
 310                  * this.
 311                  */
 312                 DRM_DEBUG("Rendering requires BOs\n");
 313                 return -EINVAL;
 314         }
 315
 316         job->bo = kvmalloc_array(job->bo_count,
 317                                  sizeof(struct drm_gem_cma_object *),
 318                                  GFP_KERNEL | __GFP_ZERO);
 319         if (!job->bo) {
 320                 DRM_DEBUG("Failed to allocate validated BO pointers\n");
 321                 return -ENOMEM;
 322         }
 323
 324         handles = kvmalloc_array(job->bo_count, sizeof(u32), GFP_KERNEL);
 325         if (!handles) {
 326                 ret = -ENOMEM;
 327                 DRM_DEBUG("Failed to allocate incoming GEM handles\n");
 328                 goto fail;
 329         }
 330
 331         if (copy_from_user(handles,
 332                            (void __user *)(uintptr_t)bo_handles,
 333                            job->bo_count * sizeof(u32))) {
 334                 ret = -EFAULT;
 335                 DRM_DEBUG("Failed to copy in GEM handles\n");
 336                 goto fail;
 337         }
 338
 339         spin_lock(&file_priv->table_lock);
 340         for (i = 0; i < job->bo_count; i++) {
 341                 struct drm_gem_object *bo = idr_find(&file_priv->object_idr,
 342                                                      handles[i]);
 343                 if (!bo) {
 344                         DRM_DEBUG("Failed to look up GEM BO %d: %d\n",
 345                                   i, handles[i]);
 346                         ret = -ENOENT;
 347                         spin_unlock(&file_priv->table_lock);
 348                         goto fail;
 349                 }
 350                 drm_gem_object_get(bo);
 351                 job->bo[i] = bo;
 352         }
 353         spin_unlock(&file_priv->table_lock);
 354
 355 fail:
 356         kvfree(handles);
 357         return ret;
 358 }
 359
 360 static void
 361 v3d_job_free(struct kref *ref)
 362 {
 363         struct v3d_job *job = container_of(ref, struct v3d_job, refcount);
 364         int i;
 365
 366         for (i = 0; i < job->bo_count; i++) {
 367                 if (job->bo[i])
 368                         drm_gem_object_put(job->bo[i]);
 369         }
 370         kvfree(job->bo);
 371
 372         dma_fence_put(job->irq_fence);
 373         dma_fence_put(job->done_fence);
 374
 375         pm_runtime_mark_last_busy(job->v3d->drm.dev);
 376         pm_runtime_put_autosuspend(job->v3d->drm.dev);
 377
 378         if (job->perfmon)
 379                 v3d_perfmon_put(job->perfmon);
 380
 381         kfree(job);
 382 }
 383
 384 static void
 385 v3d_render_job_free(struct kref *ref)
 386 {
 387         struct v3d_render_job *job = container_of(ref, struct v3d_render_job,
 388                                                   base.refcount);
 389         struct v3d_bo *bo, *save;
 390
 391         list_for_each_entry_safe(bo, save, &job->unref_list, unref_head) {
 392                 drm_gem_object_put(&bo->base.base);
 393         }
 394
 395         v3d_job_free(ref);
 396 }
 397
 398 void v3d_job_cleanup(struct v3d_job *job)
 399 {
 400         if (!job)
 401                 return;
 402
 403         drm_sched_job_cleanup(&job->base);
 404         v3d_job_put(job);
 405 }
 406
 407 void v3d_job_put(struct v3d_job *job)
 408 {
 409         kref_put(&job->refcount, job->free);
 410 }
 411
 412 int
 413 v3d_wait_bo_ioctl(struct drm_device *dev, void *data,
 414                   struct drm_file *file_priv)
 415 {
 416         int ret;
 417         struct drm_v3d_wait_bo *args = data;
 418         ktime_t start = ktime_get();
 419         u64 delta_ns;
 420         unsigned long timeout_jiffies =
 421                 nsecs_to_jiffies_timeout(args->timeout_ns);
 422
 423         if (args->pad != 0)
 424                 return -EINVAL;
 425
 426         ret = drm_gem_dma_resv_wait(file_priv, args->handle,
 427                                     true, timeout_jiffies);
 428
 429         /* Decrement the user's timeout, in case we got interrupted
 430          * such that the ioctl will be restarted.
 431          */
 432         delta_ns = ktime_to_ns(ktime_sub(ktime_get(), start));
 433         if (delta_ns < args->timeout_ns)
 434                 args->timeout_ns -= delta_ns;
 435         else
 436                 args->timeout_ns = 0;
 437
 438         /* Asked to wait beyond the jiffie/scheduler precision? */
 439         if (ret == -ETIME && args->timeout_ns)
 440                 ret = -EAGAIN;
 441
 442         return ret;
 443 }
 444
 445 static int
 446 v3d_job_add_deps(struct drm_file *file_priv, struct v3d_job *job,
 447                  u32 in_sync, u32 point)
 448 {
 449         struct dma_fence *in_fence = NULL;
 450         int ret;
 451
 452         ret = drm_syncobj_find_fence(file_priv, in_sync, point, 0, &in_fence);
 453         if (ret == -EINVAL)
 454                 return ret;
 455
 456         return drm_sched_job_add_dependency(&job->base, in_fence);
 457 }
 458
 459 static int
 460 v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,
 461              void **container, size_t size, void (*free)(struct kref *ref),
 462              u32 in_sync, struct v3d_submit_ext *se, enum v3d_queue queue)
 463 {
 464         struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 465         struct v3d_job *job;
 466         bool has_multisync = se && (se->flags & DRM_V3D_EXT_ID_MULTI_SYNC);
 467         int ret, i;
 468
 469         *container = kcalloc(1, size, GFP_KERNEL);
 470         if (!*container) {
 471                 DRM_ERROR("Cannot allocate memory for v3d job.");
 472                 return -ENOMEM;
 473         }
 474
 475         job = *container;
 476         job->v3d = v3d;
 477         job->free = free;
 478
 479         ret = pm_runtime_get_sync(v3d->drm.dev);
 480         if (ret < 0)
 481                 goto fail;
 482
 483         ret = drm_sched_job_init(&job->base, &v3d_priv->sched_entity[queue],
 484                                  v3d_priv);
 485         if (ret)
 486                 goto fail_job;
 487
 488         if (has_multisync) {
 489                 if (se->in_sync_count && se->wait_stage == queue) {
 490                         struct drm_v3d_sem __user *handle = u64_to_user_ptr(se->in_syncs);
 491
 492                         for (i = 0; i < se->in_sync_count; i++) {
 493                                 struct drm_v3d_sem in;
 494
 495                                 if (copy_from_user(&in, handle++, sizeof(in))) {
 496                                         ret = -EFAULT;
 497                                         DRM_DEBUG("Failed to copy wait dep handle.\n");
 498                                         goto fail_deps;
 499                                 }
 500                                 ret = v3d_job_add_deps(file_priv, job, in.handle, 0);
 501                                 if (ret)
 502                                         goto fail_deps;
 503                         }
 504                 }
 505         } else {
 506                 ret = v3d_job_add_deps(file_priv, job, in_sync, 0);
 507                 if (ret)
 508                         goto fail_deps;
 509         }
 510
 511         kref_init(&job->refcount);
 512
 513         return 0;
 514
 515 fail_deps:
 516         drm_sched_job_cleanup(&job->base);
 517 fail_job:
 518         pm_runtime_put_autosuspend(v3d->drm.dev);
 519 fail:
 520         kfree(*container);
 521         *container = NULL;
 522
 523         return ret;
 524 }
 525
 526 static void
 527 v3d_push_job(struct v3d_job *job)
 528 {
 529         drm_sched_job_arm(&job->base);
 530
 531         job->done_fence = dma_fence_get(&job->base.s_fence->finished);
 532
 533         /* put by scheduler job completion */
 534         kref_get(&job->refcount);
 535
 536         drm_sched_entity_push_job(&job->base);
 537 }
 538
 539 static void
 540 v3d_attach_fences_and_unlock_reservation(struct drm_file *file_priv,
 541                                          struct v3d_job *job,
 542                                          struct ww_acquire_ctx *acquire_ctx,
 543                                          u32 out_sync,
 544                                          struct v3d_submit_ext *se,
 545                                          struct dma_fence *done_fence)
 546 {
 547         struct drm_syncobj *sync_out;
 548         bool has_multisync = se && (se->flags & DRM_V3D_EXT_ID_MULTI_SYNC);
 549         int i;
 550
 551         for (i = 0; i < job->bo_count; i++) {
 552                 /* XXX: Use shared fences for read-only objects. */
 553                 dma_resv_add_fence(job->bo[i]->resv, job->done_fence,
 554                                    DMA_RESV_USAGE_WRITE);
 555         }
 556
 557         drm_gem_unlock_reservations(job->bo, job->bo_count, acquire_ctx);
 558
 559         /* Update the return sync object for the job */
 560         /* If it only supports a single signal semaphore*/
 561         if (!has_multisync) {
 562                 sync_out = drm_syncobj_find(file_priv, out_sync);
 563                 if (sync_out) {
 564                         drm_syncobj_replace_fence(sync_out, done_fence);
 565                         drm_syncobj_put(sync_out);
 566                 }
 567                 return;
 568         }
 569
 570         /* If multiple semaphores extension is supported */
 571         if (se->out_sync_count) {
 572                 for (i = 0; i < se->out_sync_count; i++) {
 573                         drm_syncobj_replace_fence(se->out_syncs[i].syncobj,
 574                                                   done_fence);
 575                         drm_syncobj_put(se->out_syncs[i].syncobj);
 576                 }
 577                 kvfree(se->out_syncs);
 578         }
 579 }
 580
 581 static void
 582 v3d_put_multisync_post_deps(struct v3d_submit_ext *se)
 583 {
 584         unsigned int i;
 585
 586         if (!(se && se->out_sync_count))
 587                 return;
 588
 589         for (i = 0; i < se->out_sync_count; i++)
 590                 drm_syncobj_put(se->out_syncs[i].syncobj);
 591         kvfree(se->out_syncs);
 592 }
 593
 594 static int
 595 v3d_get_multisync_post_deps(struct drm_file *file_priv,
 596                             struct v3d_submit_ext *se,
 597                             u32 count, u64 handles)
 598 {
 599         struct drm_v3d_sem __user *post_deps;
 600         int i, ret;
 601
 602         if (!count)
 603                 return 0;
 604
 605         se->out_syncs = (struct v3d_submit_outsync *)
 606                         kvmalloc_array(count,
 607                                        sizeof(struct v3d_submit_outsync),
 608                                        GFP_KERNEL);
 609         if (!se->out_syncs)
 610                 return -ENOMEM;
 611
 612         post_deps = u64_to_user_ptr(handles);
 613
 614         for (i = 0; i < count; i++) {
 615                 struct drm_v3d_sem out;
 616
 617                 if (copy_from_user(&out, post_deps++, sizeof(out))) {
 618                         ret = -EFAULT;
 619                         DRM_DEBUG("Failed to copy post dep handles\n");
 620                         goto fail;
 621                 }
 622
 623                 se->out_syncs[i].syncobj = drm_syncobj_find(file_priv,
 624                                                             out.handle);
 625                 if (!se->out_syncs[i].syncobj) {
 626                         ret = -EINVAL;
 627                         goto fail;
 628                 }
 629         }
 630         se->out_sync_count = count;
 631
 632         return 0;
 633
 634 fail:
 635         for (i--; i >= 0; i--)
 636                 drm_syncobj_put(se->out_syncs[i].syncobj);
 637         kvfree(se->out_syncs);
 638
 639         return ret;
 640 }
 641
 642 /* Get data for multiple binary semaphores synchronization. Parse syncobj
 643  * to be signaled when job completes (out_sync).
 644  */
 645 static int
 646 v3d_get_multisync_submit_deps(struct drm_file *file_priv,
 647                               struct drm_v3d_extension __user *ext,
 648                               void *data)
 649 {
 650         struct drm_v3d_multi_sync multisync;
 651         struct v3d_submit_ext *se = data;
 652         int ret;
 653
 654         if (copy_from_user(&multisync, ext, sizeof(multisync)))
 655                 return -EFAULT;
 656
 657         if (multisync.pad)
 658                 return -EINVAL;
 659
 660         ret = v3d_get_multisync_post_deps(file_priv, data, multisync.out_sync_count,
 661                                           multisync.out_syncs);
 662         if (ret)
 663                 return ret;
 664
 665         se->in_sync_count = multisync.in_sync_count;
 666         se->in_syncs = multisync.in_syncs;
 667         se->flags |= DRM_V3D_EXT_ID_MULTI_SYNC;
 668         se->wait_stage = multisync.wait_stage;
 669
 670         return 0;
 671 }
 672
 673 /* Whenever userspace sets ioctl extensions, v3d_get_extensions parses data
 674  * according to the extension id (name).
 675  */
 676 static int
 677 v3d_get_extensions(struct drm_file *file_priv,
 678                    u64 ext_handles,
 679                    void *data)
 680 {
 681         struct drm_v3d_extension __user *user_ext;
 682         int ret;
 683
 684         user_ext = u64_to_user_ptr(ext_handles);
 685         while (user_ext) {
 686                 struct drm_v3d_extension ext;
 687
 688                 if (copy_from_user(&ext, user_ext, sizeof(ext))) {
 689                         DRM_DEBUG("Failed to copy submit extension\n");
 690                         return -EFAULT;
 691                 }
 692
 693                 switch (ext.id) {
 694                 case DRM_V3D_EXT_ID_MULTI_SYNC:
 695                         ret = v3d_get_multisync_submit_deps(file_priv, user_ext, data);
 696                         if (ret)
 697                                 return ret;
 698                         break;
 699                 default:
 700                         DRM_DEBUG_DRIVER("Unknown extension id: %d\n", ext.id);
 701                         return -EINVAL;
 702                 }
 703
 704                 user_ext = u64_to_user_ptr(ext.next);
 705         }
 706
 707         return 0;
 708 }
 709
 710 /**
 711  * v3d_submit_cl_ioctl() - Submits a job (frame) to the V3D.
 712  * @dev: DRM device
 713  * @data: ioctl argument
 714  * @file_priv: DRM file for this fd
 715  *
 716  * This is the main entrypoint for userspace to submit a 3D frame to
 717  * the GPU.  Userspace provides the binner command list (if
 718  * applicable), and the kernel sets up the render command list to draw
 719  * to the framebuffer described in the ioctl, using the command lists
 720  * that the 3D engine's binner will produce.
 721  */
 722 int
 723 v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 724                     struct drm_file *file_priv)
 725 {
 726         struct v3d_dev *v3d = to_v3d_dev(dev);
 727         struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 728         struct drm_v3d_submit_cl *args = data;
 729         struct v3d_submit_ext se = {0};
 730         struct v3d_bin_job *bin = NULL;
 731         struct v3d_render_job *render = NULL;
 732         struct v3d_job *clean_job = NULL;
 733         struct v3d_job *last_job;
 734         struct ww_acquire_ctx acquire_ctx;
 735         int ret = 0;
 736
 737         trace_v3d_submit_cl_ioctl(&v3d->drm, args->rcl_start, args->rcl_end);
 738
 739         if (args->pad)
 740                 return -EINVAL;
 741
 742         if (args->flags &&
 743             args->flags & ~(DRM_V3D_SUBMIT_CL_FLUSH_CACHE |
 744                             DRM_V3D_SUBMIT_EXTENSION)) {
 745                 DRM_INFO("invalid flags: %d\n", args->flags);
 746                 return -EINVAL;
 747         }
 748
 749         if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
 750                 ret = v3d_get_extensions(file_priv, args->extensions, &se);
 751                 if (ret) {
 752                         DRM_DEBUG("Failed to get extensions.\n");
 753                         return ret;
 754                 }
 755         }
 756
 757         ret = v3d_job_init(v3d, file_priv, (void *)&render, sizeof(*render),
 758                            v3d_render_job_free, args->in_sync_rcl, &se, V3D_RENDER);
 759         if (ret)
 760                 goto fail;
 761
 762         render->start = args->rcl_start;
 763         render->end = args->rcl_end;
 764         INIT_LIST_HEAD(&render->unref_list);
 765
 766         if (args->bcl_start != args->bcl_end) {
 767                 ret = v3d_job_init(v3d, file_priv, (void *)&bin, sizeof(*bin),
 768                                    v3d_job_free, args->in_sync_bcl, &se, V3D_BIN);
 769                 if (ret)
 770                         goto fail;
 771
 772                 bin->start = args->bcl_start;
 773                 bin->end = args->bcl_end;
 774                 bin->qma = args->qma;
 775                 bin->qms = args->qms;
 776                 bin->qts = args->qts;
 777                 bin->render = render;
 778         }
 779
 780         if (args->flags & DRM_V3D_SUBMIT_CL_FLUSH_CACHE) {
 781                 ret = v3d_job_init(v3d, file_priv, (void *)&clean_job, sizeof(*clean_job),
 782                                    v3d_job_free, 0, NULL, V3D_CACHE_CLEAN);
 783                 if (ret)
 784                         goto fail;
 785
 786                 last_job = clean_job;
 787         } else {
 788                 last_job = &render->base;
 789         }
 790
 791         ret = v3d_lookup_bos(dev, file_priv, last_job,
 792                              args->bo_handles, args->bo_handle_count);
 793         if (ret)
 794                 goto fail;
 795
 796         ret = v3d_lock_bo_reservations(last_job, &acquire_ctx);
 797         if (ret)
 798                 goto fail;
 799
 800         if (args->perfmon_id) {
 801                 render->base.perfmon = v3d_perfmon_find(v3d_priv,
 802                                                         args->perfmon_id);
 803
 804                 if (!render->base.perfmon) {
 805                         ret = -ENOENT;
 806                         goto fail_perfmon;
 807                 }
 808         }
 809
 810         mutex_lock(&v3d->sched_lock);
 811         if (bin) {
 812                 bin->base.perfmon = render->base.perfmon;
 813                 v3d_perfmon_get(bin->base.perfmon);
 814                 v3d_push_job(&bin->base);
 815
 816                 ret = drm_sched_job_add_dependency(&render->base.base,
 817                                                    dma_fence_get(bin->base.done_fence));
 818                 if (ret)
 819                         goto fail_unreserve;
 820         }
 821
 822         v3d_push_job(&render->base);
 823
 824         if (clean_job) {
 825                 struct dma_fence *render_fence =
 826                         dma_fence_get(render->base.done_fence);
 827                 ret = drm_sched_job_add_dependency(&clean_job->base,
 828                                                    render_fence);
 829                 if (ret)
 830                         goto fail_unreserve;
 831                 clean_job->perfmon = render->base.perfmon;
 832                 v3d_perfmon_get(clean_job->perfmon);
 833                 v3d_push_job(clean_job);
 834         }
 835
 836         mutex_unlock(&v3d->sched_lock);
 837
 838         v3d_attach_fences_and_unlock_reservation(file_priv,
 839                                                  last_job,
 840                                                  &acquire_ctx,
 841                                                  args->out_sync,
 842                                                  &se,
 843                                                  last_job->done_fence);
 844
 845         if (bin)
 846                 v3d_job_put(&bin->base);
 847         v3d_job_put(&render->base);
 848         if (clean_job)
 849                 v3d_job_put(clean_job);
 850
 851         return 0;
 852
 853 fail_unreserve:
 854         mutex_unlock(&v3d->sched_lock);
 855 fail_perfmon:
 856         drm_gem_unlock_reservations(last_job->bo,
 857                                     last_job->bo_count, &acquire_ctx);
 858 fail:
 859         v3d_job_cleanup((void *)bin);
 860         v3d_job_cleanup((void *)render);
 861         v3d_job_cleanup(clean_job);
 862         v3d_put_multisync_post_deps(&se);
 863
 864         return ret;
 865 }
 866
 867 /**
 868  * v3d_submit_tfu_ioctl() - Submits a TFU (texture formatting) job to the V3D.
 869  * @dev: DRM device
 870  * @data: ioctl argument
 871  * @file_priv: DRM file for this fd
 872  *
 873  * Userspace provides the register setup for the TFU, which we don't
 874  * need to validate since the TFU is behind the MMU.
 875  */
 876 int
 877 v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
 878                      struct drm_file *file_priv)
 879 {
 880         struct v3d_dev *v3d = to_v3d_dev(dev);
 881         struct drm_v3d_submit_tfu *args = data;
 882         struct v3d_submit_ext se = {0};
 883         struct v3d_tfu_job *job = NULL;
 884         struct ww_acquire_ctx acquire_ctx;
 885         int ret = 0;
 886
 887         trace_v3d_submit_tfu_ioctl(&v3d->drm, args->iia);
 888
 889         if (args->flags && !(args->flags & DRM_V3D_SUBMIT_EXTENSION)) {
 890                 DRM_DEBUG("invalid flags: %d\n", args->flags);
 891                 return -EINVAL;
 892         }
 893
 894         if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
 895                 ret = v3d_get_extensions(file_priv, args->extensions, &se);
 896                 if (ret) {
 897                         DRM_DEBUG("Failed to get extensions.\n");
 898                         return ret;
 899                 }
 900         }
 901
 902         ret = v3d_job_init(v3d, file_priv, (void *)&job, sizeof(*job),
 903                            v3d_job_free, args->in_sync, &se, V3D_TFU);
 904         if (ret)
 905                 goto fail;
 906
 907         job->base.bo = kcalloc(ARRAY_SIZE(args->bo_handles),
 908                                sizeof(*job->base.bo), GFP_KERNEL);
 909         if (!job->base.bo) {
 910                 ret = -ENOMEM;
 911                 goto fail;
 912         }
 913
 914         job->args = *args;
 915
 916         spin_lock(&file_priv->table_lock);
 917         for (job->base.bo_count = 0;
 918              job->base.bo_count < ARRAY_SIZE(args->bo_handles);
 919              job->base.bo_count++) {
 920                 struct drm_gem_object *bo;
 921
 922                 if (!args->bo_handles[job->base.bo_count])
 923                         break;
 924
 925                 bo = idr_find(&file_priv->object_idr,
 926                               args->bo_handles[job->base.bo_count]);
 927                 if (!bo) {
 928                         DRM_DEBUG("Failed to look up GEM BO %d: %d\n",
 929                                   job->base.bo_count,
 930                                   args->bo_handles[job->base.bo_count]);
 931                         ret = -ENOENT;
 932                         spin_unlock(&file_priv->table_lock);
 933                         goto fail;
 934                 }
 935                 drm_gem_object_get(bo);
 936                 job->base.bo[job->base.bo_count] = bo;
 937         }
 938         spin_unlock(&file_priv->table_lock);
 939
 940         ret = v3d_lock_bo_reservations(&job->base, &acquire_ctx);
 941         if (ret)
 942                 goto fail;
 943
 944         mutex_lock(&v3d->sched_lock);
 945         v3d_push_job(&job->base);
 946         mutex_unlock(&v3d->sched_lock);
 947
 948         v3d_attach_fences_and_unlock_reservation(file_priv,
 949                                                  &job->base, &acquire_ctx,
 950                                                  args->out_sync,
 951                                                  &se,
 952                                                  job->base.done_fence);
 953
 954         v3d_job_put(&job->base);
 955
 956         return 0;
 957
 958 fail:
 959         v3d_job_cleanup((void *)job);
 960         v3d_put_multisync_post_deps(&se);
 961
 962         return ret;
 963 }
 964
 965 /**
 966  * v3d_submit_csd_ioctl() - Submits a CSD (texture formatting) job to the V3D.
 967  * @dev: DRM device
 968  * @data: ioctl argument
 969  * @file_priv: DRM file for this fd
 970  *
 971  * Userspace provides the register setup for the CSD, which we don't
 972  * need to validate since the CSD is behind the MMU.
 973  */
 974 int
 975 v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
 976                      struct drm_file *file_priv)
 977 {
 978         struct v3d_dev *v3d = to_v3d_dev(dev);
 979         struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 980         struct drm_v3d_submit_csd *args = data;
 981         struct v3d_submit_ext se = {0};
 982         struct v3d_csd_job *job = NULL;
 983         struct v3d_job *clean_job = NULL;
 984         struct ww_acquire_ctx acquire_ctx;
 985         int ret;
 986
 987         trace_v3d_submit_csd_ioctl(&v3d->drm, args->cfg[5], args->cfg[6]);
 988
 989         if (args->pad)
 990                 return -EINVAL;
 991
 992         if (!v3d_has_csd(v3d)) {
 993                 DRM_DEBUG("Attempting CSD submit on non-CSD hardware\n");
 994                 return -EINVAL;
 995         }
 996
 997         if (args->flags && !(args->flags & DRM_V3D_SUBMIT_EXTENSION)) {
 998                 DRM_INFO("invalid flags: %d\n", args->flags);
 999                 return -EINVAL;
1000         }
1001
1002         if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
1003                 ret = v3d_get_extensions(file_priv, args->extensions, &se);
1004                 if (ret) {
1005                         DRM_DEBUG("Failed to get extensions.\n");
1006                         return ret;
1007                 }
1008         }
1009
1010         ret = v3d_job_init(v3d, file_priv, (void *)&job, sizeof(*job),
1011                            v3d_job_free, args->in_sync, &se, V3D_CSD);
1012         if (ret)
1013                 goto fail;
1014
1015         ret = v3d_job_init(v3d, file_priv, (void *)&clean_job, sizeof(*clean_job),
1016                            v3d_job_free, 0, NULL, V3D_CACHE_CLEAN);
1017         if (ret)
1018                 goto fail;
1019
1020         job->args = *args;
1021
1022         ret = v3d_lookup_bos(dev, file_priv, clean_job,
1023                              args->bo_handles, args->bo_handle_count);
1024         if (ret)
1025                 goto fail;
1026
1027         ret = v3d_lock_bo_reservations(clean_job, &acquire_ctx);
1028         if (ret)
1029                 goto fail;
1030
1031         if (args->perfmon_id) {
1032                 job->base.perfmon = v3d_perfmon_find(v3d_priv,
1033                                                      args->perfmon_id);
1034                 if (!job->base.perfmon) {
1035                         ret = -ENOENT;
1036                         goto fail_perfmon;
1037                 }
1038         }
1039
1040         mutex_lock(&v3d->sched_lock);
1041         v3d_push_job(&job->base);
1042
1043         ret = drm_sched_job_add_dependency(&clean_job->base,
1044                                            dma_fence_get(job->base.done_fence));
1045         if (ret)
1046                 goto fail_unreserve;
1047
1048         v3d_push_job(clean_job);
1049         mutex_unlock(&v3d->sched_lock);
1050
1051         v3d_attach_fences_and_unlock_reservation(file_priv,
1052                                                  clean_job,
1053                                                  &acquire_ctx,
1054                                                  args->out_sync,
1055                                                  &se,
1056                                                  clean_job->done_fence);
1057
1058         v3d_job_put(&job->base);
1059         v3d_job_put(clean_job);
1060
1061         return 0;
1062
1063 fail_unreserve:
1064         mutex_unlock(&v3d->sched_lock);
1065 fail_perfmon:
1066         drm_gem_unlock_reservations(clean_job->bo, clean_job->bo_count,
1067                                     &acquire_ctx);
1068 fail:
1069         v3d_job_cleanup((void *)job);
1070         v3d_job_cleanup(clean_job);
1071         v3d_put_multisync_post_deps(&se);
1072
1073         return ret;
1074 }
1075
1076 int
1077 v3d_gem_init(struct drm_device *dev)
1078 {
1079         struct v3d_dev *v3d = to_v3d_dev(dev);
1080         u32 pt_size = 4096 * 1024;
1081         int ret, i;
1082
1083         for (i = 0; i < V3D_MAX_QUEUES; i++)
1084                 v3d->queue[i].fence_context = dma_fence_context_alloc(1);
1085
1086         spin_lock_init(&v3d->mm_lock);
1087         spin_lock_init(&v3d->job_lock);
1088         mutex_init(&v3d->bo_lock);
1089         mutex_init(&v3d->reset_lock);
1090         mutex_init(&v3d->sched_lock);
1091         mutex_init(&v3d->cache_clean_lock);
1092
1093         /* Note: We don't allocate address 0.  Various bits of HW
1094          * treat 0 as special, such as the occlusion query counters
1095          * where 0 means "disabled".
1096          */
1097         drm_mm_init(&v3d->mm, 1, pt_size / sizeof(u32) - 1);
1098
1099         v3d->pt = dma_alloc_wc(v3d->drm.dev, pt_size,
1100                                &v3d->pt_paddr,
1101                                GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO);
1102         if (!v3d->pt) {
1103                 drm_mm_takedown(&v3d->mm);
1104                 dev_err(v3d->drm.dev,
1105                         "Failed to allocate page tables. Please ensure you have CMA enabled.\n");
1106                 return -ENOMEM;
1107         }
1108
1109         v3d_init_hw_state(v3d);
1110         v3d_mmu_set_page_table(v3d);
1111
1112         ret = v3d_sched_init(v3d);
1113         if (ret) {
1114                 drm_mm_takedown(&v3d->mm);
1115                 dma_free_coherent(v3d->drm.dev, 4096 * 1024, (void *)v3d->pt,
1116                                   v3d->pt_paddr);
1117         }
1118
1119         return 0;
1120 }
1121
1122 void
1123 v3d_gem_destroy(struct drm_device *dev)
1124 {
1125         struct v3d_dev *v3d = to_v3d_dev(dev);
1126
1127         v3d_sched_fini(v3d);
1128
1129         /* Waiting for jobs to finish would need to be done before
1130          * unregistering V3D.
1131          */
1132         WARN_ON(v3d->bin_job);
1133         WARN_ON(v3d->render_job);
1134
1135         drm_mm_takedown(&v3d->mm);
1136
1137         dma_free_coherent(v3d->drm.dev, 4096 * 1024, (void *)v3d->pt,
1138                           v3d->pt_paddr);
1139 }