drivers/gpu/drm/tegra/drm.c

   1 /*
   2  * Copyright (C) 2012 Avionic Design GmbH
   3  * Copyright (C) 2012-2013 NVIDIA CORPORATION.  All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include <linux/host1x.h>
  11 #include <linux/iommu.h>
  12
  13 #include <drm/drm_atomic.h>
  14 #include <drm/drm_atomic_helper.h>
  15
  16 #include "drm.h"
  17 #include "gem.h"
  18
  19 #define DRIVER_NAME "tegra"
  20 #define DRIVER_DESC "NVIDIA Tegra graphics"
  21 #define DRIVER_DATE "20120330"
  22 #define DRIVER_MAJOR 0
  23 #define DRIVER_MINOR 0
  24 #define DRIVER_PATCHLEVEL 0
  25
  26 struct tegra_drm_file {
  27         struct list_head contexts;
  28 };
  29
  30 static void tegra_atomic_schedule(struct tegra_drm *tegra,
  31                                   struct drm_atomic_state *state)
  32 {
  33         tegra->commit.state = state;
  34         schedule_work(&tegra->commit.work);
  35 }
  36
  37 static void tegra_atomic_complete(struct tegra_drm *tegra,
  38                                   struct drm_atomic_state *state)
  39 {
  40         struct drm_device *drm = tegra->drm;
  41
  42         /*
  43          * Everything below can be run asynchronously without the need to grab
  44          * any modeset locks at all under one condition: It must be guaranteed
  45          * that the asynchronous work has either been cancelled (if the driver
  46          * supports it, which at least requires that the framebuffers get
  47          * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
  48          * before the new state gets committed on the software side with
  49          * drm_atomic_helper_swap_state().
  50          *
  51          * This scheme allows new atomic state updates to be prepared and
  52          * checked in parallel to the asynchronous completion of the previous
  53          * update. Which is important since compositors need to figure out the
  54          * composition of the next frame right after having submitted the
  55          * current layout.
  56          */
  57
  58         drm_atomic_helper_commit_modeset_disables(drm, state);
  59         drm_atomic_helper_commit_planes(drm, state);
  60         drm_atomic_helper_commit_modeset_enables(drm, state);
  61
  62         drm_atomic_helper_wait_for_vblanks(drm, state);
  63
  64         drm_atomic_helper_cleanup_planes(drm, state);
  65         drm_atomic_state_free(state);
  66 }
  67
  68 static void tegra_atomic_work(struct work_struct *work)
  69 {
  70         struct tegra_drm *tegra = container_of(work, struct tegra_drm,
  71                                                commit.work);
  72
  73         tegra_atomic_complete(tegra, tegra->commit.state);
  74 }
  75
  76 static int tegra_atomic_commit(struct drm_device *drm,
  77                                struct drm_atomic_state *state, bool async)
  78 {
  79         struct tegra_drm *tegra = drm->dev_private;
  80         int err;
  81
  82         err = drm_atomic_helper_prepare_planes(drm, state);
  83         if (err)
  84                 return err;
  85
  86         /* serialize outstanding asynchronous commits */
  87         mutex_lock(&tegra->commit.lock);
  88         flush_work(&tegra->commit.work);
  89
  90         /*
  91          * This is the point of no return - everything below never fails except
  92          * when the hw goes bonghits. Which means we can commit the new state on
  93          * the software side now.
  94          */
  95
  96         drm_atomic_helper_swap_state(drm, state);
  97
  98         if (async)
  99                 tegra_atomic_schedule(tegra, state);
 100         else
 101                 tegra_atomic_complete(tegra, state);
 102
 103         mutex_unlock(&tegra->commit.lock);
 104         return 0;
 105 }
 106
 107 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
 108         .fb_create = tegra_fb_create,
 109 #ifdef CONFIG_DRM_TEGRA_FBDEV
 110         .output_poll_changed = tegra_fb_output_poll_changed,
 111 #endif
 112         .atomic_check = drm_atomic_helper_check,
 113         .atomic_commit = tegra_atomic_commit,
 114 };
 115
 116 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
 117 {
 118         struct host1x_device *device = to_host1x_device(drm->dev);
 119         struct tegra_drm *tegra;
 120         int err;
 121
 122         tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
 123         if (!tegra)
 124                 return -ENOMEM;
 125
 126         if (iommu_present(&platform_bus_type)) {
 127                 struct iommu_domain_geometry *geometry;
 128                 u64 start, end;
 129
 130                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
 131                 if (!tegra->domain) {
 132                         err = -ENOMEM;
 133                         goto free;
 134                 }
 135
 136                 geometry = &tegra->domain->geometry;
 137                 start = geometry->aperture_start;
 138                 end = geometry->aperture_end;
 139
 140                 DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
 141                           start, end);
 142                 drm_mm_init(&tegra->mm, start, end - start + 1);
 143         }
 144
 145         mutex_init(&tegra->clients_lock);
 146         INIT_LIST_HEAD(&tegra->clients);
 147
 148         mutex_init(&tegra->commit.lock);
 149         INIT_WORK(&tegra->commit.work, tegra_atomic_work);
 150
 151         drm->dev_private = tegra;
 152         tegra->drm = drm;
 153
 154         drm_mode_config_init(drm);
 155
 156         drm->mode_config.min_width = 0;
 157         drm->mode_config.min_height = 0;
 158
 159         drm->mode_config.max_width = 4096;
 160         drm->mode_config.max_height = 4096;
 161
 162         drm->mode_config.funcs = &tegra_drm_mode_funcs;
 163
 164         err = tegra_drm_fb_prepare(drm);
 165         if (err < 0)
 166                 goto config;
 167
 168         drm_kms_helper_poll_init(drm);
 169
 170         err = host1x_device_init(device);
 171         if (err < 0)
 172                 goto fbdev;
 173
 174         drm_mode_config_reset(drm);
 175
 176         /*
 177          * We don't use the drm_irq_install() helpers provided by the DRM
 178          * core, so we need to set this manually in order to allow the
 179          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 180          */
 181         drm->irq_enabled = true;
 182
 183         /* syncpoints are used for full 32-bit hardware VBLANK counters */
 184         drm->max_vblank_count = 0xffffffff;
 185
 186         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
 187         if (err < 0)
 188                 goto device;
 189
 190         err = tegra_drm_fb_init(drm);
 191         if (err < 0)
 192                 goto vblank;
 193
 194         return 0;
 195
 196 vblank:
 197         drm_vblank_cleanup(drm);
 198 device:
 199         host1x_device_exit(device);
 200 fbdev:
 201         drm_kms_helper_poll_fini(drm);
 202         tegra_drm_fb_free(drm);
 203 config:
 204         drm_mode_config_cleanup(drm);
 205
 206         if (tegra->domain) {
 207                 iommu_domain_free(tegra->domain);
 208                 drm_mm_takedown(&tegra->mm);
 209         }
 210 free:
 211         kfree(tegra);
 212         return err;
 213 }
 214
 215 static int tegra_drm_unload(struct drm_device *drm)
 216 {
 217         struct host1x_device *device = to_host1x_device(drm->dev);
 218         struct tegra_drm *tegra = drm->dev_private;
 219         int err;
 220
 221         drm_kms_helper_poll_fini(drm);
 222         tegra_drm_fb_exit(drm);
 223         drm_mode_config_cleanup(drm);
 224         drm_vblank_cleanup(drm);
 225
 226         err = host1x_device_exit(device);
 227         if (err < 0)
 228                 return err;
 229
 230         if (tegra->domain) {
 231                 iommu_domain_free(tegra->domain);
 232                 drm_mm_takedown(&tegra->mm);
 233         }
 234
 235         kfree(tegra);
 236
 237         return 0;
 238 }
 239
 240 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
 241 {
 242         struct tegra_drm_file *fpriv;
 243
 244         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
 245         if (!fpriv)
 246                 return -ENOMEM;
 247
 248         INIT_LIST_HEAD(&fpriv->contexts);
 249         filp->driver_priv = fpriv;
 250
 251         return 0;
 252 }
 253
 254 static void tegra_drm_context_free(struct tegra_drm_context *context)
 255 {
 256         context->client->ops->close_channel(context);
 257         kfree(context);
 258 }
 259
 260 static void tegra_drm_lastclose(struct drm_device *drm)
 261 {
 262 #ifdef CONFIG_DRM_TEGRA_FBDEV
 263         struct tegra_drm *tegra = drm->dev_private;
 264
 265         tegra_fbdev_restore_mode(tegra->fbdev);
 266 #endif
 267 }
 268
 269 static struct host1x_bo *
 270 host1x_bo_lookup(struct drm_device *drm, struct drm_file *file, u32 handle)
 271 {
 272         struct drm_gem_object *gem;
 273         struct tegra_bo *bo;
 274
 275         gem = drm_gem_object_lookup(drm, file, handle);
 276         if (!gem)
 277                 return NULL;
 278
 279         mutex_lock(&drm->struct_mutex);
 280         drm_gem_object_unreference(gem);
 281         mutex_unlock(&drm->struct_mutex);
 282
 283         bo = to_tegra_bo(gem);
 284         return &bo->base;
 285 }
 286
 287 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
 288                                        struct drm_tegra_reloc __user *src,
 289                                        struct drm_device *drm,
 290                                        struct drm_file *file)
 291 {
 292         u32 cmdbuf, target;
 293         int err;
 294
 295         err = get_user(cmdbuf, &src->cmdbuf.handle);
 296         if (err < 0)
 297                 return err;
 298
 299         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
 300         if (err < 0)
 301                 return err;
 302
 303         err = get_user(target, &src->target.handle);
 304         if (err < 0)
 305                 return err;
 306
 307         err = get_user(dest->target.offset, &src->target.offset);
 308         if (err < 0)
 309                 return err;
 310
 311         err = get_user(dest->shift, &src->shift);
 312         if (err < 0)
 313                 return err;
 314
 315         dest->cmdbuf.bo = host1x_bo_lookup(drm, file, cmdbuf);
 316         if (!dest->cmdbuf.bo)
 317                 return -ENOENT;
 318
 319         dest->target.bo = host1x_bo_lookup(drm, file, target);
 320         if (!dest->target.bo)
 321                 return -ENOENT;
 322
 323         return 0;
 324 }
 325
 326 int tegra_drm_submit(struct tegra_drm_context *context,
 327                      struct drm_tegra_submit *args, struct drm_device *drm,
 328                      struct drm_file *file)
 329 {
 330         unsigned int num_cmdbufs = args->num_cmdbufs;
 331         unsigned int num_relocs = args->num_relocs;
 332         unsigned int num_waitchks = args->num_waitchks;
 333         struct drm_tegra_cmdbuf __user *cmdbufs =
 334                 (void __user *)(uintptr_t)args->cmdbufs;
 335         struct drm_tegra_reloc __user *relocs =
 336                 (void __user *)(uintptr_t)args->relocs;
 337         struct drm_tegra_waitchk __user *waitchks =
 338                 (void __user *)(uintptr_t)args->waitchks;
 339         struct drm_tegra_syncpt syncpt;
 340         struct host1x_job *job;
 341         int err;
 342
 343         /* We don't yet support other than one syncpt_incr struct per submit */
 344         if (args->num_syncpts != 1)
 345                 return -EINVAL;
 346
 347         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
 348                                args->num_relocs, args->num_waitchks);
 349         if (!job)
 350                 return -ENOMEM;
 351
 352         job->num_relocs = args->num_relocs;
 353         job->num_waitchk = args->num_waitchks;
 354         job->client = (u32)args->context;
 355         job->class = context->client->base.class;
 356         job->serialize = true;
 357
 358         while (num_cmdbufs) {
 359                 struct drm_tegra_cmdbuf cmdbuf;
 360                 struct host1x_bo *bo;
 361
 362                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
 363                         err = -EFAULT;
 364                         goto fail;
 365                 }
 366
 367                 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
 368                 if (!bo) {
 369                         err = -ENOENT;
 370                         goto fail;
 371                 }
 372
 373                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
 374                 num_cmdbufs--;
 375                 cmdbufs++;
 376         }
 377
 378         /* copy and resolve relocations from submit */
 379         while (num_relocs--) {
 380                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
 381                                                   &relocs[num_relocs], drm,
 382                                                   file);
 383                 if (err < 0)
 384                         goto fail;
 385         }
 386
 387         if (copy_from_user(job->waitchk, waitchks,
 388                            sizeof(*waitchks) * num_waitchks)) {
 389                 err = -EFAULT;
 390                 goto fail;
 391         }
 392
 393         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
 394                            sizeof(syncpt))) {
 395                 err = -EFAULT;
 396                 goto fail;
 397         }
 398
 399         job->is_addr_reg = context->client->ops->is_addr_reg;
 400         job->syncpt_incrs = syncpt.incrs;
 401         job->syncpt_id = syncpt.id;
 402         job->timeout = 10000;
 403
 404         if (args->timeout && args->timeout < 10000)
 405                 job->timeout = args->timeout;
 406
 407         err = host1x_job_pin(job, context->client->base.dev);
 408         if (err)
 409                 goto fail;
 410
 411         err = host1x_job_submit(job);
 412         if (err)
 413                 goto fail_submit;
 414
 415         args->fence = job->syncpt_end;
 416
 417         host1x_job_put(job);
 418         return 0;
 419
 420 fail_submit:
 421         host1x_job_unpin(job);
 422 fail:
 423         host1x_job_put(job);
 424         return err;
 425 }
 426
 427
 428 #ifdef CONFIG_DRM_TEGRA_STAGING
 429 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
 430 {
 431         return (struct tegra_drm_context *)(uintptr_t)context;
 432 }
 433
 434 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
 435                                         struct tegra_drm_context *context)
 436 {
 437         struct tegra_drm_context *ctx;
 438
 439         list_for_each_entry(ctx, &file->contexts, list)
 440                 if (ctx == context)
 441                         return true;
 442
 443         return false;
 444 }
 445
 446 static int tegra_gem_create(struct drm_device *drm, void *data,
 447                             struct drm_file *file)
 448 {
 449         struct drm_tegra_gem_create *args = data;
 450         struct tegra_bo *bo;
 451
 452         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
 453                                          &args->handle);
 454         if (IS_ERR(bo))
 455                 return PTR_ERR(bo);
 456
 457         return 0;
 458 }
 459
 460 static int tegra_gem_mmap(struct drm_device *drm, void *data,
 461                           struct drm_file *file)
 462 {
 463         struct drm_tegra_gem_mmap *args = data;
 464         struct drm_gem_object *gem;
 465         struct tegra_bo *bo;
 466
 467         gem = drm_gem_object_lookup(drm, file, args->handle);
 468         if (!gem)
 469                 return -EINVAL;
 470
 471         bo = to_tegra_bo(gem);
 472
 473         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
 474
 475         drm_gem_object_unreference(gem);
 476
 477         return 0;
 478 }
 479
 480 static int tegra_syncpt_read(struct drm_device *drm, void *data,
 481                              struct drm_file *file)
 482 {
 483         struct host1x *host = dev_get_drvdata(drm->dev->parent);
 484         struct drm_tegra_syncpt_read *args = data;
 485         struct host1x_syncpt *sp;
 486
 487         sp = host1x_syncpt_get(host, args->id);
 488         if (!sp)
 489                 return -EINVAL;
 490
 491         args->value = host1x_syncpt_read_min(sp);
 492         return 0;
 493 }
 494
 495 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
 496                              struct drm_file *file)
 497 {
 498         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 499         struct drm_tegra_syncpt_incr *args = data;
 500         struct host1x_syncpt *sp;
 501
 502         sp = host1x_syncpt_get(host1x, args->id);
 503         if (!sp)
 504                 return -EINVAL;
 505
 506         return host1x_syncpt_incr(sp);
 507 }
 508
 509 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
 510                              struct drm_file *file)
 511 {
 512         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 513         struct drm_tegra_syncpt_wait *args = data;
 514         struct host1x_syncpt *sp;
 515
 516         sp = host1x_syncpt_get(host1x, args->id);
 517         if (!sp)
 518                 return -EINVAL;
 519
 520         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
 521                                   &args->value);
 522 }
 523
 524 static int tegra_open_channel(struct drm_device *drm, void *data,
 525                               struct drm_file *file)
 526 {
 527         struct tegra_drm_file *fpriv = file->driver_priv;
 528         struct tegra_drm *tegra = drm->dev_private;
 529         struct drm_tegra_open_channel *args = data;
 530         struct tegra_drm_context *context;
 531         struct tegra_drm_client *client;
 532         int err = -ENODEV;
 533
 534         context = kzalloc(sizeof(*context), GFP_KERNEL);
 535         if (!context)
 536                 return -ENOMEM;
 537
 538         list_for_each_entry(client, &tegra->clients, list)
 539                 if (client->base.class == args->client) {
 540                         err = client->ops->open_channel(client, context);
 541                         if (err)
 542                                 break;
 543
 544                         list_add(&context->list, &fpriv->contexts);
 545                         args->context = (uintptr_t)context;
 546                         context->client = client;
 547                         return 0;
 548                 }
 549
 550         kfree(context);
 551         return err;
 552 }
 553
 554 static int tegra_close_channel(struct drm_device *drm, void *data,
 555                                struct drm_file *file)
 556 {
 557         struct tegra_drm_file *fpriv = file->driver_priv;
 558         struct drm_tegra_close_channel *args = data;
 559         struct tegra_drm_context *context;
 560
 561         context = tegra_drm_get_context(args->context);
 562
 563         if (!tegra_drm_file_owns_context(fpriv, context))
 564                 return -EINVAL;
 565
 566         list_del(&context->list);
 567         tegra_drm_context_free(context);
 568
 569         return 0;
 570 }
 571
 572 static int tegra_get_syncpt(struct drm_device *drm, void *data,
 573                             struct drm_file *file)
 574 {
 575         struct tegra_drm_file *fpriv = file->driver_priv;
 576         struct drm_tegra_get_syncpt *args = data;
 577         struct tegra_drm_context *context;
 578         struct host1x_syncpt *syncpt;
 579
 580         context = tegra_drm_get_context(args->context);
 581
 582         if (!tegra_drm_file_owns_context(fpriv, context))
 583                 return -ENODEV;
 584
 585         if (args->index >= context->client->base.num_syncpts)
 586                 return -EINVAL;
 587
 588         syncpt = context->client->base.syncpts[args->index];
 589         args->id = host1x_syncpt_id(syncpt);
 590
 591         return 0;
 592 }
 593
 594 static int tegra_submit(struct drm_device *drm, void *data,
 595                         struct drm_file *file)
 596 {
 597         struct tegra_drm_file *fpriv = file->driver_priv;
 598         struct drm_tegra_submit *args = data;
 599         struct tegra_drm_context *context;
 600
 601         context = tegra_drm_get_context(args->context);
 602
 603         if (!tegra_drm_file_owns_context(fpriv, context))
 604                 return -ENODEV;
 605
 606         return context->client->ops->submit(context, args, drm, file);
 607 }
 608
 609 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
 610                                  struct drm_file *file)
 611 {
 612         struct tegra_drm_file *fpriv = file->driver_priv;
 613         struct drm_tegra_get_syncpt_base *args = data;
 614         struct tegra_drm_context *context;
 615         struct host1x_syncpt_base *base;
 616         struct host1x_syncpt *syncpt;
 617
 618         context = tegra_drm_get_context(args->context);
 619
 620         if (!tegra_drm_file_owns_context(fpriv, context))
 621                 return -ENODEV;
 622
 623         if (args->syncpt >= context->client->base.num_syncpts)
 624                 return -EINVAL;
 625
 626         syncpt = context->client->base.syncpts[args->syncpt];
 627
 628         base = host1x_syncpt_get_base(syncpt);
 629         if (!base)
 630                 return -ENXIO;
 631
 632         args->id = host1x_syncpt_base_id(base);
 633
 634         return 0;
 635 }
 636
 637 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
 638                                 struct drm_file *file)
 639 {
 640         struct drm_tegra_gem_set_tiling *args = data;
 641         enum tegra_bo_tiling_mode mode;
 642         struct drm_gem_object *gem;
 643         unsigned long value = 0;
 644         struct tegra_bo *bo;
 645
 646         switch (args->mode) {
 647         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
 648                 mode = TEGRA_BO_TILING_MODE_PITCH;
 649
 650                 if (args->value != 0)
 651                         return -EINVAL;
 652
 653                 break;
 654
 655         case DRM_TEGRA_GEM_TILING_MODE_TILED:
 656                 mode = TEGRA_BO_TILING_MODE_TILED;
 657
 658                 if (args->value != 0)
 659                         return -EINVAL;
 660
 661                 break;
 662
 663         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
 664                 mode = TEGRA_BO_TILING_MODE_BLOCK;
 665
 666                 if (args->value > 5)
 667                         return -EINVAL;
 668
 669                 value = args->value;
 670                 break;
 671
 672         default:
 673                 return -EINVAL;
 674         }
 675
 676         gem = drm_gem_object_lookup(drm, file, args->handle);
 677         if (!gem)
 678                 return -ENOENT;
 679
 680         bo = to_tegra_bo(gem);
 681
 682         bo->tiling.mode = mode;
 683         bo->tiling.value = value;
 684
 685         drm_gem_object_unreference(gem);
 686
 687         return 0;
 688 }
 689
 690 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
 691                                 struct drm_file *file)
 692 {
 693         struct drm_tegra_gem_get_tiling *args = data;
 694         struct drm_gem_object *gem;
 695         struct tegra_bo *bo;
 696         int err = 0;
 697
 698         gem = drm_gem_object_lookup(drm, file, args->handle);
 699         if (!gem)
 700                 return -ENOENT;
 701
 702         bo = to_tegra_bo(gem);
 703
 704         switch (bo->tiling.mode) {
 705         case TEGRA_BO_TILING_MODE_PITCH:
 706                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
 707                 args->value = 0;
 708                 break;
 709
 710         case TEGRA_BO_TILING_MODE_TILED:
 711                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
 712                 args->value = 0;
 713                 break;
 714
 715         case TEGRA_BO_TILING_MODE_BLOCK:
 716                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
 717                 args->value = bo->tiling.value;
 718                 break;
 719
 720         default:
 721                 err = -EINVAL;
 722                 break;
 723         }
 724
 725         drm_gem_object_unreference(gem);
 726
 727         return err;
 728 }
 729
 730 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
 731                                struct drm_file *file)
 732 {
 733         struct drm_tegra_gem_set_flags *args = data;
 734         struct drm_gem_object *gem;
 735         struct tegra_bo *bo;
 736
 737         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
 738                 return -EINVAL;
 739
 740         gem = drm_gem_object_lookup(drm, file, args->handle);
 741         if (!gem)
 742                 return -ENOENT;
 743
 744         bo = to_tegra_bo(gem);
 745         bo->flags = 0;
 746
 747         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
 748                 bo->flags |= TEGRA_BO_BOTTOM_UP;
 749
 750         drm_gem_object_unreference(gem);
 751
 752         return 0;
 753 }
 754
 755 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
 756                                struct drm_file *file)
 757 {
 758         struct drm_tegra_gem_get_flags *args = data;
 759         struct drm_gem_object *gem;
 760         struct tegra_bo *bo;
 761
 762         gem = drm_gem_object_lookup(drm, file, args->handle);
 763         if (!gem)
 764                 return -ENOENT;
 765
 766         bo = to_tegra_bo(gem);
 767         args->flags = 0;
 768
 769         if (bo->flags & TEGRA_BO_BOTTOM_UP)
 770                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
 771
 772         drm_gem_object_unreference(gem);
 773
 774         return 0;
 775 }
 776 #endif
 777
 778 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
 779 #ifdef CONFIG_DRM_TEGRA_STAGING
 780         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED),
 781         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
 782         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
 783         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
 784         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
 785         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
 786         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
 787         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
 788         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
 789         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, DRM_UNLOCKED),
 790         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, DRM_UNLOCKED),
 791         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, DRM_UNLOCKED),
 792         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, DRM_UNLOCKED),
 793         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, DRM_UNLOCKED),
 794 #endif
 795 };
 796
 797 static const struct file_operations tegra_drm_fops = {
 798         .owner = THIS_MODULE,
 799         .open = drm_open,
 800         .release = drm_release,
 801         .unlocked_ioctl = drm_ioctl,
 802         .mmap = tegra_drm_mmap,
 803         .poll = drm_poll,
 804         .read = drm_read,
 805 #ifdef CONFIG_COMPAT
 806         .compat_ioctl = drm_compat_ioctl,
 807 #endif
 808         .llseek = noop_llseek,
 809 };
 810
 811 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
 812                                              unsigned int pipe)
 813 {
 814         struct drm_crtc *crtc;
 815
 816         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
 817                 if (pipe == drm_crtc_index(crtc))
 818                         return crtc;
 819         }
 820
 821         return NULL;
 822 }
 823
 824 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm, int pipe)
 825 {
 826         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 827         struct tegra_dc *dc = to_tegra_dc(crtc);
 828
 829         if (!crtc)
 830                 return 0;
 831
 832         return tegra_dc_get_vblank_counter(dc);
 833 }
 834
 835 static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
 836 {
 837         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 838         struct tegra_dc *dc = to_tegra_dc(crtc);
 839
 840         if (!crtc)
 841                 return -ENODEV;
 842
 843         tegra_dc_enable_vblank(dc);
 844
 845         return 0;
 846 }
 847
 848 static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
 849 {
 850         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 851         struct tegra_dc *dc = to_tegra_dc(crtc);
 852
 853         if (crtc)
 854                 tegra_dc_disable_vblank(dc);
 855 }
 856
 857 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
 858 {
 859         struct tegra_drm_file *fpriv = file->driver_priv;
 860         struct tegra_drm_context *context, *tmp;
 861         struct drm_crtc *crtc;
 862
 863         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 864                 tegra_dc_cancel_page_flip(crtc, file);
 865
 866         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
 867                 tegra_drm_context_free(context);
 868
 869         kfree(fpriv);
 870 }
 871
 872 #ifdef CONFIG_DEBUG_FS
 873 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
 874 {
 875         struct drm_info_node *node = (struct drm_info_node *)s->private;
 876         struct drm_device *drm = node->minor->dev;
 877         struct drm_framebuffer *fb;
 878
 879         mutex_lock(&drm->mode_config.fb_lock);
 880
 881         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
 882                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
 883                            fb->base.id, fb->width, fb->height, fb->depth,
 884                            fb->bits_per_pixel,
 885                            atomic_read(&fb->refcount.refcount));
 886         }
 887
 888         mutex_unlock(&drm->mode_config.fb_lock);
 889
 890         return 0;
 891 }
 892
 893 static int tegra_debugfs_iova(struct seq_file *s, void *data)
 894 {
 895         struct drm_info_node *node = (struct drm_info_node *)s->private;
 896         struct drm_device *drm = node->minor->dev;
 897         struct tegra_drm *tegra = drm->dev_private;
 898
 899         return drm_mm_dump_table(s, &tegra->mm);
 900 }
 901
 902 static struct drm_info_list tegra_debugfs_list[] = {
 903         { "framebuffers", tegra_debugfs_framebuffers, 0 },
 904         { "iova", tegra_debugfs_iova, 0 },
 905 };
 906
 907 static int tegra_debugfs_init(struct drm_minor *minor)
 908 {
 909         return drm_debugfs_create_files(tegra_debugfs_list,
 910                                         ARRAY_SIZE(tegra_debugfs_list),
 911                                         minor->debugfs_root, minor);
 912 }
 913
 914 static void tegra_debugfs_cleanup(struct drm_minor *minor)
 915 {
 916         drm_debugfs_remove_files(tegra_debugfs_list,
 917                                  ARRAY_SIZE(tegra_debugfs_list), minor);
 918 }
 919 #endif
 920
 921 static struct drm_driver tegra_drm_driver = {
 922         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 923         .load = tegra_drm_load,
 924         .unload = tegra_drm_unload,
 925         .open = tegra_drm_open,
 926         .preclose = tegra_drm_preclose,
 927         .lastclose = tegra_drm_lastclose,
 928
 929         .get_vblank_counter = tegra_drm_get_vblank_counter,
 930         .enable_vblank = tegra_drm_enable_vblank,
 931         .disable_vblank = tegra_drm_disable_vblank,
 932
 933 #if defined(CONFIG_DEBUG_FS)
 934         .debugfs_init = tegra_debugfs_init,
 935         .debugfs_cleanup = tegra_debugfs_cleanup,
 936 #endif
 937
 938         .gem_free_object = tegra_bo_free_object,
 939         .gem_vm_ops = &tegra_bo_vm_ops,
 940
 941         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 942         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 943         .gem_prime_export = tegra_gem_prime_export,
 944         .gem_prime_import = tegra_gem_prime_import,
 945
 946         .dumb_create = tegra_bo_dumb_create,
 947         .dumb_map_offset = tegra_bo_dumb_map_offset,
 948         .dumb_destroy = drm_gem_dumb_destroy,
 949
 950         .ioctls = tegra_drm_ioctls,
 951         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
 952         .fops = &tegra_drm_fops,
 953
 954         .name = DRIVER_NAME,
 955         .desc = DRIVER_DESC,
 956         .date = DRIVER_DATE,
 957         .major = DRIVER_MAJOR,
 958         .minor = DRIVER_MINOR,
 959         .patchlevel = DRIVER_PATCHLEVEL,
 960 };
 961
 962 int tegra_drm_register_client(struct tegra_drm *tegra,
 963                               struct tegra_drm_client *client)
 964 {
 965         mutex_lock(&tegra->clients_lock);
 966         list_add_tail(&client->list, &tegra->clients);
 967         mutex_unlock(&tegra->clients_lock);
 968
 969         return 0;
 970 }
 971
 972 int tegra_drm_unregister_client(struct tegra_drm *tegra,
 973                                 struct tegra_drm_client *client)
 974 {
 975         mutex_lock(&tegra->clients_lock);
 976         list_del_init(&client->list);
 977         mutex_unlock(&tegra->clients_lock);
 978
 979         return 0;
 980 }
 981
 982 static int host1x_drm_probe(struct host1x_device *dev)
 983 {
 984         struct drm_driver *driver = &tegra_drm_driver;
 985         struct drm_device *drm;
 986         int err;
 987
 988         drm = drm_dev_alloc(driver, &dev->dev);
 989         if (!drm)
 990                 return -ENOMEM;
 991
 992         drm_dev_set_unique(drm, dev_name(&dev->dev));
 993         dev_set_drvdata(&dev->dev, drm);
 994
 995         err = drm_dev_register(drm, 0);
 996         if (err < 0)
 997                 goto unref;
 998
 999         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
1000                  driver->major, driver->minor, driver->patchlevel,
1001                  driver->date, drm->primary->index);
1002
1003         return 0;
1004
1005 unref:
1006         drm_dev_unref(drm);
1007         return err;
1008 }
1009
1010 static int host1x_drm_remove(struct host1x_device *dev)
1011 {
1012         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1013
1014         drm_dev_unregister(drm);
1015         drm_dev_unref(drm);
1016
1017         return 0;
1018 }
1019
1020 #ifdef CONFIG_PM_SLEEP
1021 static int host1x_drm_suspend(struct device *dev)
1022 {
1023         struct drm_device *drm = dev_get_drvdata(dev);
1024
1025         drm_kms_helper_poll_disable(drm);
1026
1027         return 0;
1028 }
1029
1030 static int host1x_drm_resume(struct device *dev)
1031 {
1032         struct drm_device *drm = dev_get_drvdata(dev);
1033
1034         drm_kms_helper_poll_enable(drm);
1035
1036         return 0;
1037 }
1038 #endif
1039
1040 static const struct dev_pm_ops host1x_drm_pm_ops = {
1041         SET_SYSTEM_SLEEP_PM_OPS(host1x_drm_suspend, host1x_drm_resume)
1042 };
1043
1044 static const struct of_device_id host1x_drm_subdevs[] = {
1045         { .compatible = "nvidia,tegra20-dc", },
1046         { .compatible = "nvidia,tegra20-hdmi", },
1047         { .compatible = "nvidia,tegra20-gr2d", },
1048         { .compatible = "nvidia,tegra20-gr3d", },
1049         { .compatible = "nvidia,tegra30-dc", },
1050         { .compatible = "nvidia,tegra30-hdmi", },
1051         { .compatible = "nvidia,tegra30-gr2d", },
1052         { .compatible = "nvidia,tegra30-gr3d", },
1053         { .compatible = "nvidia,tegra114-dsi", },
1054         { .compatible = "nvidia,tegra114-hdmi", },
1055         { .compatible = "nvidia,tegra114-gr3d", },
1056         { .compatible = "nvidia,tegra124-dc", },
1057         { .compatible = "nvidia,tegra124-sor", },
1058         { .compatible = "nvidia,tegra124-hdmi", },
1059         { /* sentinel */ }
1060 };
1061
1062 static struct host1x_driver host1x_drm_driver = {
1063         .driver = {
1064                 .name = "drm",
1065                 .pm = &host1x_drm_pm_ops,
1066         },
1067         .probe = host1x_drm_probe,
1068         .remove = host1x_drm_remove,
1069         .subdevs = host1x_drm_subdevs,
1070 };
1071
1072 static int __init host1x_drm_init(void)
1073 {
1074         int err;
1075
1076         err = host1x_driver_register(&host1x_drm_driver);
1077         if (err < 0)
1078                 return err;
1079
1080         err = platform_driver_register(&tegra_dc_driver);
1081         if (err < 0)
1082                 goto unregister_host1x;
1083
1084         err = platform_driver_register(&tegra_dsi_driver);
1085         if (err < 0)
1086                 goto unregister_dc;
1087
1088         err = platform_driver_register(&tegra_sor_driver);
1089         if (err < 0)
1090                 goto unregister_dsi;
1091
1092         err = platform_driver_register(&tegra_hdmi_driver);
1093         if (err < 0)
1094                 goto unregister_sor;
1095
1096         err = platform_driver_register(&tegra_dpaux_driver);
1097         if (err < 0)
1098                 goto unregister_hdmi;
1099
1100         err = platform_driver_register(&tegra_gr2d_driver);
1101         if (err < 0)
1102                 goto unregister_dpaux;
1103
1104         err = platform_driver_register(&tegra_gr3d_driver);
1105         if (err < 0)
1106                 goto unregister_gr2d;
1107
1108         return 0;
1109
1110 unregister_gr2d:
1111         platform_driver_unregister(&tegra_gr2d_driver);
1112 unregister_dpaux:
1113         platform_driver_unregister(&tegra_dpaux_driver);
1114 unregister_hdmi:
1115         platform_driver_unregister(&tegra_hdmi_driver);
1116 unregister_sor:
1117         platform_driver_unregister(&tegra_sor_driver);
1118 unregister_dsi:
1119         platform_driver_unregister(&tegra_dsi_driver);
1120 unregister_dc:
1121         platform_driver_unregister(&tegra_dc_driver);
1122 unregister_host1x:
1123         host1x_driver_unregister(&host1x_drm_driver);
1124         return err;
1125 }
1126 module_init(host1x_drm_init);
1127
1128 static void __exit host1x_drm_exit(void)
1129 {
1130         platform_driver_unregister(&tegra_gr3d_driver);
1131         platform_driver_unregister(&tegra_gr2d_driver);
1132         platform_driver_unregister(&tegra_dpaux_driver);
1133         platform_driver_unregister(&tegra_hdmi_driver);
1134         platform_driver_unregister(&tegra_sor_driver);
1135         platform_driver_unregister(&tegra_dsi_driver);
1136         platform_driver_unregister(&tegra_dc_driver);
1137         host1x_driver_unregister(&host1x_drm_driver);
1138 }
1139 module_exit(host1x_drm_exit);
1140
1141 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1142 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1143 MODULE_LICENSE("GPL v2");