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         trace_v3d_reset_end(dev);
 130 }
 131
 132 static void
 133 v3d_flush_l3(struct v3d_dev *v3d)
 134 {
 135         if (v3d->ver < 41) {
 136                 u32 gca_ctrl = V3D_GCA_READ(V3D_GCA_CACHE_CTRL);
 137
 138                 V3D_GCA_WRITE(V3D_GCA_CACHE_CTRL,
 139                               gca_ctrl | V3D_GCA_CACHE_CTRL_FLUSH);
 140
 141                 if (v3d->ver < 33) {
 142                         V3D_GCA_WRITE(V3D_GCA_CACHE_CTRL,
 143                                       gca_ctrl & ~V3D_GCA_CACHE_CTRL_FLUSH);
 144                 }
 145         }
 146 }
 147
 148 /* Invalidates the (read-only) L2C cache.  This was the L2 cache for
 149  * uniforms and instructions on V3D 3.2.
 150  */
 151 static void
 152 v3d_invalidate_l2c(struct v3d_dev *v3d, int core)
 153 {
 154         if (v3d->ver > 32)
 155                 return;
 156
 157         V3D_CORE_WRITE(core, V3D_CTL_L2CACTL,
 158                        V3D_L2CACTL_L2CCLR |
 159                        V3D_L2CACTL_L2CENA);
 160 }
 161
 162 /* Invalidates texture L2 cachelines */
 163 static void
 164 v3d_flush_l2t(struct v3d_dev *v3d, int core)
 165 {
 166         /* While there is a busy bit (V3D_L2TCACTL_L2TFLS), we don't
 167          * need to wait for completion before dispatching the job --
 168          * L2T accesses will be stalled until the flush has completed.
 169          * However, we do need to make sure we don't try to trigger a
 170          * new flush while the L2_CLEAN queue is trying to
 171          * synchronously clean after a job.
 172          */
 173         mutex_lock(&v3d->cache_clean_lock);
 174         V3D_CORE_WRITE(core, V3D_CTL_L2TCACTL,
 175                        V3D_L2TCACTL_L2TFLS |
 176                        V3D_SET_FIELD(V3D_L2TCACTL_FLM_FLUSH, V3D_L2TCACTL_FLM));
 177         mutex_unlock(&v3d->cache_clean_lock);
 178 }
 179
 180 /* Cleans texture L1 and L2 cachelines (writing back dirty data).
 181  *
 182  * For cleaning, which happens from the CACHE_CLEAN queue after CSD has
 183  * executed, we need to make sure that the clean is done before
 184  * signaling job completion.  So, we synchronously wait before
 185  * returning, and we make sure that L2 invalidates don't happen in the
 186  * meantime to confuse our are-we-done checks.
 187  */
 188 void
 189 v3d_clean_caches(struct v3d_dev *v3d)
 190 {
 191         struct drm_device *dev = &v3d->drm;
 192         int core = 0;
 193
 194         trace_v3d_cache_clean_begin(dev);
 195
 196         V3D_CORE_WRITE(core, V3D_CTL_L2TCACTL, V3D_L2TCACTL_TMUWCF);
 197         if (wait_for(!(V3D_CORE_READ(core, V3D_CTL_L2TCACTL) &
 198                        V3D_L2TCACTL_L2TFLS), 100)) {
 199                 DRM_ERROR("Timeout waiting for L1T write combiner flush\n");
 200         }
 201
 202         mutex_lock(&v3d->cache_clean_lock);
 203         V3D_CORE_WRITE(core, V3D_CTL_L2TCACTL,
 204                        V3D_L2TCACTL_L2TFLS |
 205                        V3D_SET_FIELD(V3D_L2TCACTL_FLM_CLEAN, V3D_L2TCACTL_FLM));
 206
 207         if (wait_for(!(V3D_CORE_READ(core, V3D_CTL_L2TCACTL) &
 208                        V3D_L2TCACTL_L2TFLS), 100)) {
 209                 DRM_ERROR("Timeout waiting for L2T clean\n");
 210         }
 211
 212         mutex_unlock(&v3d->cache_clean_lock);
 213
 214         trace_v3d_cache_clean_end(dev);
 215 }
 216
 217 /* Invalidates the slice caches.  These are read-only caches. */
 218 static void
 219 v3d_invalidate_slices(struct v3d_dev *v3d, int core)
 220 {
 221         V3D_CORE_WRITE(core, V3D_CTL_SLCACTL,
 222                        V3D_SET_FIELD(0xf, V3D_SLCACTL_TVCCS) |
 223                        V3D_SET_FIELD(0xf, V3D_SLCACTL_TDCCS) |
 224                        V3D_SET_FIELD(0xf, V3D_SLCACTL_UCC) |
 225                        V3D_SET_FIELD(0xf, V3D_SLCACTL_ICC));
 226 }
 227
 228 void
 229 v3d_invalidate_caches(struct v3d_dev *v3d)
 230 {
 231         /* Invalidate the caches from the outside in.  That way if
 232          * another CL's concurrent use of nearby memory were to pull
 233          * an invalidated cacheline back in, we wouldn't leave stale
 234          * data in the inner cache.
 235          */
 236         v3d_flush_l3(v3d);
 237         v3d_invalidate_l2c(v3d, 0);
 238         v3d_flush_l2t(v3d, 0);
 239         v3d_invalidate_slices(v3d, 0);
 240 }
 241
 242 /* Takes the reservation lock on all the BOs being referenced, so that
 243  * at queue submit time we can update the reservations.
 244  *
 245  * We don't lock the RCL the tile alloc/state BOs, or overflow memory
 246  * (all of which are on exec->unref_list).  They're entirely private
 247  * to v3d, so we don't attach dma-buf fences to them.
 248  */
 249 static int
 250 v3d_lock_bo_reservations(struct v3d_job *job,
 251                          struct ww_acquire_ctx *acquire_ctx)
 252 {
 253         int i, ret;
 254
 255         ret = drm_gem_lock_reservations(job->bo, job->bo_count, acquire_ctx);
 256         if (ret)
 257                 return ret;
 258
 259         for (i = 0; i < job->bo_count; i++) {
 260                 ret = drm_gem_fence_array_add_implicit(&job->deps,
 261                                                        job->bo[i], true);
 262                 if (ret) {
 263                         drm_gem_unlock_reservations(job->bo, job->bo_count,
 264                                                     acquire_ctx);
 265                         return ret;
 266                 }
 267         }
 268
 269         return 0;
 270 }
 271
 272 /**
 273  * v3d_lookup_bos() - Sets up job->bo[] with the GEM objects
 274  * referenced by the job.
 275  * @dev: DRM device
 276  * @file_priv: DRM file for this fd
 277  * @job: V3D job being set up
 278  *
 279  * The command validator needs to reference BOs by their index within
 280  * the submitted job's BO list.  This does the validation of the job's
 281  * BO list and reference counting for the lifetime of the job.
 282  *
 283  * Note that this function doesn't need to unreference the BOs on
 284  * failure, because that will happen at v3d_exec_cleanup() time.
 285  */
 286 static int
 287 v3d_lookup_bos(struct drm_device *dev,
 288                struct drm_file *file_priv,
 289                struct v3d_job *job,
 290                u64 bo_handles,
 291                u32 bo_count)
 292 {
 293         u32 *handles;
 294         int ret = 0;
 295         int i;
 296
 297         job->bo_count = bo_count;
 298
 299         if (!job->bo_count) {
 300                 /* See comment on bo_index for why we have to check
 301                  * this.
 302                  */
 303                 DRM_DEBUG("Rendering requires BOs\n");
 304                 return -EINVAL;
 305         }
 306
 307         job->bo = kvmalloc_array(job->bo_count,
 308                                  sizeof(struct drm_gem_cma_object *),
 309                                  GFP_KERNEL | __GFP_ZERO);
 310         if (!job->bo) {
 311                 DRM_DEBUG("Failed to allocate validated BO pointers\n");
 312                 return -ENOMEM;
 313         }
 314
 315         handles = kvmalloc_array(job->bo_count, sizeof(u32), GFP_KERNEL);
 316         if (!handles) {
 317                 ret = -ENOMEM;
 318                 DRM_DEBUG("Failed to allocate incoming GEM handles\n");
 319                 goto fail;
 320         }
 321
 322         if (copy_from_user(handles,
 323                            (void __user *)(uintptr_t)bo_handles,
 324                            job->bo_count * sizeof(u32))) {
 325                 ret = -EFAULT;
 326                 DRM_DEBUG("Failed to copy in GEM handles\n");
 327                 goto fail;
 328         }
 329
 330         spin_lock(&file_priv->table_lock);
 331         for (i = 0; i < job->bo_count; i++) {
 332                 struct drm_gem_object *bo = idr_find(&file_priv->object_idr,
 333                                                      handles[i]);
 334                 if (!bo) {
 335                         DRM_DEBUG("Failed to look up GEM BO %d: %d\n",
 336                                   i, handles[i]);
 337                         ret = -ENOENT;
 338                         spin_unlock(&file_priv->table_lock);
 339                         goto fail;
 340                 }
 341                 drm_gem_object_get(bo);
 342                 job->bo[i] = bo;
 343         }
 344         spin_unlock(&file_priv->table_lock);
 345
 346 fail:
 347         kvfree(handles);
 348         return ret;
 349 }
 350
 351 static void
 352 v3d_job_free(struct kref *ref)
 353 {
 354         struct v3d_job *job = container_of(ref, struct v3d_job, refcount);
 355         unsigned long index;
 356         struct dma_fence *fence;
 357         int i;
 358
 359         for (i = 0; i < job->bo_count; i++) {
 360                 if (job->bo[i])
 361                         drm_gem_object_put(job->bo[i]);
 362         }
 363         kvfree(job->bo);
 364
 365         xa_for_each(&job->deps, index, fence) {
 366                 dma_fence_put(fence);
 367         }
 368         xa_destroy(&job->deps);
 369
 370         dma_fence_put(job->irq_fence);
 371         dma_fence_put(job->done_fence);
 372
 373         pm_runtime_mark_last_busy(job->v3d->drm.dev);
 374         pm_runtime_put_autosuspend(job->v3d->drm.dev);
 375
 376         kfree(job);
 377 }
 378
 379 static void
 380 v3d_render_job_free(struct kref *ref)
 381 {
 382         struct v3d_render_job *job = container_of(ref, struct v3d_render_job,
 383                                                   base.refcount);
 384         struct v3d_bo *bo, *save;
 385
 386         list_for_each_entry_safe(bo, save, &job->unref_list, unref_head) {
 387                 drm_gem_object_put(&bo->base.base);
 388         }
 389
 390         v3d_job_free(ref);
 391 }
 392
 393 void v3d_job_put(struct v3d_job *job)
 394 {
 395         kref_put(&job->refcount, job->free);
 396 }
 397
 398 int
 399 v3d_wait_bo_ioctl(struct drm_device *dev, void *data,
 400                   struct drm_file *file_priv)
 401 {
 402         int ret;
 403         struct drm_v3d_wait_bo *args = data;
 404         ktime_t start = ktime_get();
 405         u64 delta_ns;
 406         unsigned long timeout_jiffies =
 407                 nsecs_to_jiffies_timeout(args->timeout_ns);
 408
 409         if (args->pad != 0)
 410                 return -EINVAL;
 411
 412         ret = drm_gem_dma_resv_wait(file_priv, args->handle,
 413                                               true, timeout_jiffies);
 414
 415         /* Decrement the user's timeout, in case we got interrupted
 416          * such that the ioctl will be restarted.
 417          */
 418         delta_ns = ktime_to_ns(ktime_sub(ktime_get(), start));
 419         if (delta_ns < args->timeout_ns)
 420                 args->timeout_ns -= delta_ns;
 421         else
 422                 args->timeout_ns = 0;
 423
 424         /* Asked to wait beyond the jiffie/scheduler precision? */
 425         if (ret == -ETIME && args->timeout_ns)
 426                 ret = -EAGAIN;
 427
 428         return ret;
 429 }
 430
 431 static int
 432 v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,
 433              struct v3d_job *job, void (*free)(struct kref *ref),
 434              u32 in_sync)
 435 {
 436         struct dma_fence *in_fence = NULL;
 437         int ret;
 438
 439         job->v3d = v3d;
 440         job->free = free;
 441
 442         ret = pm_runtime_get_sync(v3d->drm.dev);
 443         if (ret < 0)
 444                 return ret;
 445
 446         xa_init_flags(&job->deps, XA_FLAGS_ALLOC);
 447
 448         ret = drm_syncobj_find_fence(file_priv, in_sync, 0, 0, &in_fence);
 449         if (ret == -EINVAL)
 450                 goto fail;
 451
 452         ret = drm_gem_fence_array_add(&job->deps, in_fence);
 453         if (ret)
 454                 goto fail;
 455
 456         kref_init(&job->refcount);
 457
 458         return 0;
 459 fail:
 460         xa_destroy(&job->deps);
 461         pm_runtime_put_autosuspend(v3d->drm.dev);
 462         return ret;
 463 }
 464
 465 static int
 466 v3d_push_job(struct v3d_file_priv *v3d_priv,
 467              struct v3d_job *job, enum v3d_queue queue)
 468 {
 469         int ret;
 470
 471         ret = drm_sched_job_init(&job->base, &v3d_priv->sched_entity[queue],
 472                                  v3d_priv);
 473         if (ret)
 474                 return ret;
 475
 476         job->done_fence = dma_fence_get(&job->base.s_fence->finished);
 477
 478         /* put by scheduler job completion */
 479         kref_get(&job->refcount);
 480
 481         drm_sched_entity_push_job(&job->base, &v3d_priv->sched_entity[queue]);
 482
 483         return 0;
 484 }
 485
 486 static void
 487 v3d_attach_fences_and_unlock_reservation(struct drm_file *file_priv,
 488                                          struct v3d_job *job,
 489                                          struct ww_acquire_ctx *acquire_ctx,
 490                                          u32 out_sync,
 491                                          struct dma_fence *done_fence)
 492 {
 493         struct drm_syncobj *sync_out;
 494         int i;
 495
 496         for (i = 0; i < job->bo_count; i++) {
 497                 /* XXX: Use shared fences for read-only objects. */
 498                 dma_resv_add_excl_fence(job->bo[i]->resv,
 499                                                   job->done_fence);
 500         }
 501
 502         drm_gem_unlock_reservations(job->bo, job->bo_count, acquire_ctx);
 503
 504         /* Update the return sync object for the job */
 505         sync_out = drm_syncobj_find(file_priv, out_sync);
 506         if (sync_out) {
 507                 drm_syncobj_replace_fence(sync_out, done_fence);
 508                 drm_syncobj_put(sync_out);
 509         }
 510 }
 511
 512 /**
 513  * v3d_submit_cl_ioctl() - Submits a job (frame) to the V3D.
 514  * @dev: DRM device
 515  * @data: ioctl argument
 516  * @file_priv: DRM file for this fd
 517  *
 518  * This is the main entrypoint for userspace to submit a 3D frame to
 519  * the GPU.  Userspace provides the binner command list (if
 520  * applicable), and the kernel sets up the render command list to draw
 521  * to the framebuffer described in the ioctl, using the command lists
 522  * that the 3D engine's binner will produce.
 523  */
 524 int
 525 v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 526                     struct drm_file *file_priv)
 527 {
 528         struct v3d_dev *v3d = to_v3d_dev(dev);
 529         struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 530         struct drm_v3d_submit_cl *args = data;
 531         struct v3d_bin_job *bin = NULL;
 532         struct v3d_render_job *render;
 533         struct v3d_job *clean_job = NULL;
 534         struct v3d_job *last_job;
 535         struct ww_acquire_ctx acquire_ctx;
 536         int ret = 0;
 537
 538         trace_v3d_submit_cl_ioctl(&v3d->drm, args->rcl_start, args->rcl_end);
 539
 540         if (args->flags != 0 &&
 541             args->flags != DRM_V3D_SUBMIT_CL_FLUSH_CACHE) {
 542                 DRM_INFO("invalid flags: %d\n", args->flags);
 543                 return -EINVAL;
 544         }
 545
 546         render = kcalloc(1, sizeof(*render), GFP_KERNEL);
 547         if (!render)
 548                 return -ENOMEM;
 549
 550         render->start = args->rcl_start;
 551         render->end = args->rcl_end;
 552         INIT_LIST_HEAD(&render->unref_list);
 553
 554         ret = v3d_job_init(v3d, file_priv, &render->base,
 555                            v3d_render_job_free, args->in_sync_rcl);
 556         if (ret) {
 557                 kfree(render);
 558                 return ret;
 559         }
 560
 561         if (args->bcl_start != args->bcl_end) {
 562                 bin = kcalloc(1, sizeof(*bin), GFP_KERNEL);
 563                 if (!bin) {
 564                         v3d_job_put(&render->base);
 565                         return -ENOMEM;
 566                 }
 567
 568                 ret = v3d_job_init(v3d, file_priv, &bin->base,
 569                                    v3d_job_free, args->in_sync_bcl);
 570                 if (ret) {
 571                         v3d_job_put(&render->base);
 572                         kfree(bin);
 573                         return ret;
 574                 }
 575
 576                 bin->start = args->bcl_start;
 577                 bin->end = args->bcl_end;
 578                 bin->qma = args->qma;
 579                 bin->qms = args->qms;
 580                 bin->qts = args->qts;
 581                 bin->render = render;
 582         }
 583
 584         if (args->flags & DRM_V3D_SUBMIT_CL_FLUSH_CACHE) {
 585                 clean_job = kcalloc(1, sizeof(*clean_job), GFP_KERNEL);
 586                 if (!clean_job) {
 587                         ret = -ENOMEM;
 588                         goto fail;
 589                 }
 590
 591                 ret = v3d_job_init(v3d, file_priv, clean_job, v3d_job_free, 0);
 592                 if (ret) {
 593                         kfree(clean_job);
 594                         clean_job = NULL;
 595                         goto fail;
 596                 }
 597
 598                 last_job = clean_job;
 599         } else {
 600                 last_job = &render->base;
 601         }
 602
 603         ret = v3d_lookup_bos(dev, file_priv, last_job,
 604                              args->bo_handles, args->bo_handle_count);
 605         if (ret)
 606                 goto fail;
 607
 608         ret = v3d_lock_bo_reservations(last_job, &acquire_ctx);
 609         if (ret)
 610                 goto fail;
 611
 612         mutex_lock(&v3d->sched_lock);
 613         if (bin) {
 614                 ret = v3d_push_job(v3d_priv, &bin->base, V3D_BIN);
 615                 if (ret)
 616                         goto fail_unreserve;
 617
 618                 ret = drm_gem_fence_array_add(&render->base.deps,
 619                                               dma_fence_get(bin->base.done_fence));
 620                 if (ret)
 621                         goto fail_unreserve;
 622         }
 623
 624         ret = v3d_push_job(v3d_priv, &render->base, V3D_RENDER);
 625         if (ret)
 626                 goto fail_unreserve;
 627
 628         if (clean_job) {
 629                 struct dma_fence *render_fence =
 630                         dma_fence_get(render->base.done_fence);
 631                 ret = drm_gem_fence_array_add(&clean_job->deps, render_fence);
 632                 if (ret)
 633                         goto fail_unreserve;
 634                 ret = v3d_push_job(v3d_priv, clean_job, V3D_CACHE_CLEAN);
 635                 if (ret)
 636                         goto fail_unreserve;
 637         }
 638
 639         mutex_unlock(&v3d->sched_lock);
 640
 641         v3d_attach_fences_and_unlock_reservation(file_priv,
 642                                                  last_job,
 643                                                  &acquire_ctx,
 644                                                  args->out_sync,
 645                                                  last_job->done_fence);
 646
 647         if (bin)
 648                 v3d_job_put(&bin->base);
 649         v3d_job_put(&render->base);
 650         if (clean_job)
 651                 v3d_job_put(clean_job);
 652
 653         return 0;
 654
 655 fail_unreserve:
 656         mutex_unlock(&v3d->sched_lock);
 657         drm_gem_unlock_reservations(last_job->bo,
 658                                     last_job->bo_count, &acquire_ctx);
 659 fail:
 660         if (bin)
 661                 v3d_job_put(&bin->base);
 662         v3d_job_put(&render->base);
 663         if (clean_job)
 664                 v3d_job_put(clean_job);
 665
 666         return ret;
 667 }
 668
 669 /**
 670  * v3d_submit_tfu_ioctl() - Submits a TFU (texture formatting) job to the V3D.
 671  * @dev: DRM device
 672  * @data: ioctl argument
 673  * @file_priv: DRM file for this fd
 674  *
 675  * Userspace provides the register setup for the TFU, which we don't
 676  * need to validate since the TFU is behind the MMU.
 677  */
 678 int
 679 v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
 680                      struct drm_file *file_priv)
 681 {
 682         struct v3d_dev *v3d = to_v3d_dev(dev);
 683         struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 684         struct drm_v3d_submit_tfu *args = data;
 685         struct v3d_tfu_job *job;
 686         struct ww_acquire_ctx acquire_ctx;
 687         int ret = 0;
 688
 689         trace_v3d_submit_tfu_ioctl(&v3d->drm, args->iia);
 690
 691         job = kcalloc(1, sizeof(*job), GFP_KERNEL);
 692         if (!job)
 693                 return -ENOMEM;
 694
 695         ret = v3d_job_init(v3d, file_priv, &job->base,
 696                            v3d_job_free, args->in_sync);
 697         if (ret) {
 698                 kfree(job);
 699                 return ret;
 700         }
 701
 702         job->base.bo = kcalloc(ARRAY_SIZE(args->bo_handles),
 703                                sizeof(*job->base.bo), GFP_KERNEL);
 704         if (!job->base.bo) {
 705                 v3d_job_put(&job->base);
 706                 return -ENOMEM;
 707         }
 708
 709         job->args = *args;
 710
 711         spin_lock(&file_priv->table_lock);
 712         for (job->base.bo_count = 0;
 713              job->base.bo_count < ARRAY_SIZE(args->bo_handles);
 714              job->base.bo_count++) {
 715                 struct drm_gem_object *bo;
 716
 717                 if (!args->bo_handles[job->base.bo_count])
 718                         break;
 719
 720                 bo = idr_find(&file_priv->object_idr,
 721                               args->bo_handles[job->base.bo_count]);
 722                 if (!bo) {
 723                         DRM_DEBUG("Failed to look up GEM BO %d: %d\n",
 724                                   job->base.bo_count,
 725                                   args->bo_handles[job->base.bo_count]);
 726                         ret = -ENOENT;
 727                         spin_unlock(&file_priv->table_lock);
 728                         goto fail;
 729                 }
 730                 drm_gem_object_get(bo);
 731                 job->base.bo[job->base.bo_count] = bo;
 732         }
 733         spin_unlock(&file_priv->table_lock);
 734
 735         ret = v3d_lock_bo_reservations(&job->base, &acquire_ctx);
 736         if (ret)
 737                 goto fail;
 738
 739         mutex_lock(&v3d->sched_lock);
 740         ret = v3d_push_job(v3d_priv, &job->base, V3D_TFU);
 741         if (ret)
 742                 goto fail_unreserve;
 743         mutex_unlock(&v3d->sched_lock);
 744
 745         v3d_attach_fences_and_unlock_reservation(file_priv,
 746                                                  &job->base, &acquire_ctx,
 747                                                  args->out_sync,
 748                                                  job->base.done_fence);
 749
 750         v3d_job_put(&job->base);
 751
 752         return 0;
 753
 754 fail_unreserve:
 755         mutex_unlock(&v3d->sched_lock);
 756         drm_gem_unlock_reservations(job->base.bo, job->base.bo_count,
 757                                     &acquire_ctx);
 758 fail:
 759         v3d_job_put(&job->base);
 760
 761         return ret;
 762 }
 763
 764 /**
 765  * v3d_submit_csd_ioctl() - Submits a CSD (texture formatting) job to the V3D.
 766  * @dev: DRM device
 767  * @data: ioctl argument
 768  * @file_priv: DRM file for this fd
 769  *
 770  * Userspace provides the register setup for the CSD, which we don't
 771  * need to validate since the CSD is behind the MMU.
 772  */
 773 int
 774 v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
 775                      struct drm_file *file_priv)
 776 {
 777         struct v3d_dev *v3d = to_v3d_dev(dev);
 778         struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
 779         struct drm_v3d_submit_csd *args = data;
 780         struct v3d_csd_job *job;
 781         struct v3d_job *clean_job;
 782         struct ww_acquire_ctx acquire_ctx;
 783         int ret;
 784
 785         trace_v3d_submit_csd_ioctl(&v3d->drm, args->cfg[5], args->cfg[6]);
 786
 787         if (!v3d_has_csd(v3d)) {
 788                 DRM_DEBUG("Attempting CSD submit on non-CSD hardware\n");
 789                 return -EINVAL;
 790         }
 791
 792         job = kcalloc(1, sizeof(*job), GFP_KERNEL);
 793         if (!job)
 794                 return -ENOMEM;
 795
 796         ret = v3d_job_init(v3d, file_priv, &job->base,
 797                            v3d_job_free, args->in_sync);
 798         if (ret) {
 799                 kfree(job);
 800                 return ret;
 801         }
 802
 803         clean_job = kcalloc(1, sizeof(*clean_job), GFP_KERNEL);
 804         if (!clean_job) {
 805                 v3d_job_put(&job->base);
 806                 kfree(job);
 807                 return -ENOMEM;
 808         }
 809
 810         ret = v3d_job_init(v3d, file_priv, clean_job, v3d_job_free, 0);
 811         if (ret) {
 812                 v3d_job_put(&job->base);
 813                 kfree(clean_job);
 814                 return ret;
 815         }
 816
 817         job->args = *args;
 818
 819         ret = v3d_lookup_bos(dev, file_priv, clean_job,
 820                              args->bo_handles, args->bo_handle_count);
 821         if (ret)
 822                 goto fail;
 823
 824         ret = v3d_lock_bo_reservations(clean_job, &acquire_ctx);
 825         if (ret)
 826                 goto fail;
 827
 828         mutex_lock(&v3d->sched_lock);
 829         ret = v3d_push_job(v3d_priv, &job->base, V3D_CSD);
 830         if (ret)
 831                 goto fail_unreserve;
 832
 833         ret = drm_gem_fence_array_add(&clean_job->deps,
 834                                       dma_fence_get(job->base.done_fence));
 835         if (ret)
 836                 goto fail_unreserve;
 837
 838         ret = v3d_push_job(v3d_priv, clean_job, V3D_CACHE_CLEAN);
 839         if (ret)
 840                 goto fail_unreserve;
 841         mutex_unlock(&v3d->sched_lock);
 842
 843         v3d_attach_fences_and_unlock_reservation(file_priv,
 844                                                  clean_job,
 845                                                  &acquire_ctx,
 846                                                  args->out_sync,
 847                                                  clean_job->done_fence);
 848
 849         v3d_job_put(&job->base);
 850         v3d_job_put(clean_job);
 851
 852         return 0;
 853
 854 fail_unreserve:
 855         mutex_unlock(&v3d->sched_lock);
 856         drm_gem_unlock_reservations(clean_job->bo, clean_job->bo_count,
 857                                     &acquire_ctx);
 858 fail:
 859         v3d_job_put(&job->base);
 860         v3d_job_put(clean_job);
 861
 862         return ret;
 863 }
 864
 865 int
 866 v3d_gem_init(struct drm_device *dev)
 867 {
 868         struct v3d_dev *v3d = to_v3d_dev(dev);
 869         u32 pt_size = 4096 * 1024;
 870         int ret, i;
 871
 872         for (i = 0; i < V3D_MAX_QUEUES; i++)
 873                 v3d->queue[i].fence_context = dma_fence_context_alloc(1);
 874
 875         spin_lock_init(&v3d->mm_lock);
 876         spin_lock_init(&v3d->job_lock);
 877         mutex_init(&v3d->bo_lock);
 878         mutex_init(&v3d->reset_lock);
 879         mutex_init(&v3d->sched_lock);
 880         mutex_init(&v3d->cache_clean_lock);
 881
 882         /* Note: We don't allocate address 0.  Various bits of HW
 883          * treat 0 as special, such as the occlusion query counters
 884          * where 0 means "disabled".
 885          */
 886         drm_mm_init(&v3d->mm, 1, pt_size / sizeof(u32) - 1);
 887
 888         v3d->pt = dma_alloc_wc(v3d->drm.dev, pt_size,
 889                                &v3d->pt_paddr,
 890                                GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO);
 891         if (!v3d->pt) {
 892                 drm_mm_takedown(&v3d->mm);
 893                 dev_err(v3d->drm.dev,
 894                         "Failed to allocate page tables. "
 895                         "Please ensure you have CMA enabled.\n");
 896                 return -ENOMEM;
 897         }
 898
 899         v3d_init_hw_state(v3d);
 900         v3d_mmu_set_page_table(v3d);
 901
 902         ret = v3d_sched_init(v3d);
 903         if (ret) {
 904                 drm_mm_takedown(&v3d->mm);
 905                 dma_free_coherent(v3d->drm.dev, 4096 * 1024, (void *)v3d->pt,
 906                                   v3d->pt_paddr);
 907         }
 908
 909         return 0;
 910 }
 911
 912 void
 913 v3d_gem_destroy(struct drm_device *dev)
 914 {
 915         struct v3d_dev *v3d = to_v3d_dev(dev);
 916
 917         v3d_sched_fini(v3d);
 918
 919         /* Waiting for jobs to finish would need to be done before
 920          * unregistering V3D.
 921          */
 922         WARN_ON(v3d->bin_job);
 923         WARN_ON(v3d->render_job);
 924
 925         drm_mm_takedown(&v3d->mm);
 926
 927         dma_free_coherent(v3d->drm.dev, 4096 * 1024, (void *)v3d->pt,
 928                           v3d->pt_paddr);
 929 }