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                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
 128                 if (!tegra->domain) {
 129                         err = -ENOMEM;
 130                         goto free;
 131                 }
 132
 133                 DRM_DEBUG("IOMMU context initialized\n");
 134                 drm_mm_init(&tegra->mm, 0, SZ_2G);
 135         }
 136
 137         mutex_init(&tegra->clients_lock);
 138         INIT_LIST_HEAD(&tegra->clients);
 139
 140         mutex_init(&tegra->commit.lock);
 141         INIT_WORK(&tegra->commit.work, tegra_atomic_work);
 142
 143         drm->dev_private = tegra;
 144         tegra->drm = drm;
 145
 146         drm_mode_config_init(drm);
 147
 148         drm->mode_config.min_width = 0;
 149         drm->mode_config.min_height = 0;
 150
 151         drm->mode_config.max_width = 4096;
 152         drm->mode_config.max_height = 4096;
 153
 154         drm->mode_config.funcs = &tegra_drm_mode_funcs;
 155
 156         err = tegra_drm_fb_prepare(drm);
 157         if (err < 0)
 158                 goto config;
 159
 160         drm_kms_helper_poll_init(drm);
 161
 162         err = host1x_device_init(device);
 163         if (err < 0)
 164                 goto fbdev;
 165
 166         drm_mode_config_reset(drm);
 167
 168         /*
 169          * We don't use the drm_irq_install() helpers provided by the DRM
 170          * core, so we need to set this manually in order to allow the
 171          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 172          */
 173         drm->irq_enabled = true;
 174
 175         /* syncpoints are used for full 32-bit hardware VBLANK counters */
 176         drm->vblank_disable_immediate = true;
 177         drm->max_vblank_count = 0xffffffff;
 178
 179         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
 180         if (err < 0)
 181                 goto device;
 182
 183         err = tegra_drm_fb_init(drm);
 184         if (err < 0)
 185                 goto vblank;
 186
 187         return 0;
 188
 189 vblank:
 190         drm_vblank_cleanup(drm);
 191 device:
 192         host1x_device_exit(device);
 193 fbdev:
 194         drm_kms_helper_poll_fini(drm);
 195         tegra_drm_fb_free(drm);
 196 config:
 197         drm_mode_config_cleanup(drm);
 198
 199         if (tegra->domain) {
 200                 iommu_domain_free(tegra->domain);
 201                 drm_mm_takedown(&tegra->mm);
 202         }
 203 free:
 204         kfree(tegra);
 205         return err;
 206 }
 207
 208 static int tegra_drm_unload(struct drm_device *drm)
 209 {
 210         struct host1x_device *device = to_host1x_device(drm->dev);
 211         struct tegra_drm *tegra = drm->dev_private;
 212         int err;
 213
 214         drm_kms_helper_poll_fini(drm);
 215         tegra_drm_fb_exit(drm);
 216         drm_mode_config_cleanup(drm);
 217         drm_vblank_cleanup(drm);
 218
 219         err = host1x_device_exit(device);
 220         if (err < 0)
 221                 return err;
 222
 223         if (tegra->domain) {
 224                 iommu_domain_free(tegra->domain);
 225                 drm_mm_takedown(&tegra->mm);
 226         }
 227
 228         kfree(tegra);
 229
 230         return 0;
 231 }
 232
 233 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
 234 {
 235         struct tegra_drm_file *fpriv;
 236
 237         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
 238         if (!fpriv)
 239                 return -ENOMEM;
 240
 241         INIT_LIST_HEAD(&fpriv->contexts);
 242         filp->driver_priv = fpriv;
 243
 244         return 0;
 245 }
 246
 247 static void tegra_drm_context_free(struct tegra_drm_context *context)
 248 {
 249         context->client->ops->close_channel(context);
 250         kfree(context);
 251 }
 252
 253 static void tegra_drm_lastclose(struct drm_device *drm)
 254 {
 255 #ifdef CONFIG_DRM_TEGRA_FBDEV
 256         struct tegra_drm *tegra = drm->dev_private;
 257
 258         tegra_fbdev_restore_mode(tegra->fbdev);
 259 #endif
 260 }
 261
 262 static struct host1x_bo *
 263 host1x_bo_lookup(struct drm_device *drm, struct drm_file *file, u32 handle)
 264 {
 265         struct drm_gem_object *gem;
 266         struct tegra_bo *bo;
 267
 268         gem = drm_gem_object_lookup(drm, file, handle);
 269         if (!gem)
 270                 return NULL;
 271
 272         mutex_lock(&drm->struct_mutex);
 273         drm_gem_object_unreference(gem);
 274         mutex_unlock(&drm->struct_mutex);
 275
 276         bo = to_tegra_bo(gem);
 277         return &bo->base;
 278 }
 279
 280 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
 281                                        struct drm_tegra_reloc __user *src,
 282                                        struct drm_device *drm,
 283                                        struct drm_file *file)
 284 {
 285         u32 cmdbuf, target;
 286         int err;
 287
 288         err = get_user(cmdbuf, &src->cmdbuf.handle);
 289         if (err < 0)
 290                 return err;
 291
 292         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
 293         if (err < 0)
 294                 return err;
 295
 296         err = get_user(target, &src->target.handle);
 297         if (err < 0)
 298                 return err;
 299
 300         err = get_user(dest->target.offset, &src->target.offset);
 301         if (err < 0)
 302                 return err;
 303
 304         err = get_user(dest->shift, &src->shift);
 305         if (err < 0)
 306                 return err;
 307
 308         dest->cmdbuf.bo = host1x_bo_lookup(drm, file, cmdbuf);
 309         if (!dest->cmdbuf.bo)
 310                 return -ENOENT;
 311
 312         dest->target.bo = host1x_bo_lookup(drm, file, target);
 313         if (!dest->target.bo)
 314                 return -ENOENT;
 315
 316         return 0;
 317 }
 318
 319 int tegra_drm_submit(struct tegra_drm_context *context,
 320                      struct drm_tegra_submit *args, struct drm_device *drm,
 321                      struct drm_file *file)
 322 {
 323         unsigned int num_cmdbufs = args->num_cmdbufs;
 324         unsigned int num_relocs = args->num_relocs;
 325         unsigned int num_waitchks = args->num_waitchks;
 326         struct drm_tegra_cmdbuf __user *cmdbufs =
 327                 (void __user *)(uintptr_t)args->cmdbufs;
 328         struct drm_tegra_reloc __user *relocs =
 329                 (void __user *)(uintptr_t)args->relocs;
 330         struct drm_tegra_waitchk __user *waitchks =
 331                 (void __user *)(uintptr_t)args->waitchks;
 332         struct drm_tegra_syncpt syncpt;
 333         struct host1x_job *job;
 334         int err;
 335
 336         /* We don't yet support other than one syncpt_incr struct per submit */
 337         if (args->num_syncpts != 1)
 338                 return -EINVAL;
 339
 340         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
 341                                args->num_relocs, args->num_waitchks);
 342         if (!job)
 343                 return -ENOMEM;
 344
 345         job->num_relocs = args->num_relocs;
 346         job->num_waitchk = args->num_waitchks;
 347         job->client = (u32)args->context;
 348         job->class = context->client->base.class;
 349         job->serialize = true;
 350
 351         while (num_cmdbufs) {
 352                 struct drm_tegra_cmdbuf cmdbuf;
 353                 struct host1x_bo *bo;
 354
 355                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
 356                         err = -EFAULT;
 357                         goto fail;
 358                 }
 359
 360                 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
 361                 if (!bo) {
 362                         err = -ENOENT;
 363                         goto fail;
 364                 }
 365
 366                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
 367                 num_cmdbufs--;
 368                 cmdbufs++;
 369         }
 370
 371         /* copy and resolve relocations from submit */
 372         while (num_relocs--) {
 373                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
 374                                                   &relocs[num_relocs], drm,
 375                                                   file);
 376                 if (err < 0)
 377                         goto fail;
 378         }
 379
 380         if (copy_from_user(job->waitchk, waitchks,
 381                            sizeof(*waitchks) * num_waitchks)) {
 382                 err = -EFAULT;
 383                 goto fail;
 384         }
 385
 386         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
 387                            sizeof(syncpt))) {
 388                 err = -EFAULT;
 389                 goto fail;
 390         }
 391
 392         job->is_addr_reg = context->client->ops->is_addr_reg;
 393         job->syncpt_incrs = syncpt.incrs;
 394         job->syncpt_id = syncpt.id;
 395         job->timeout = 10000;
 396
 397         if (args->timeout && args->timeout < 10000)
 398                 job->timeout = args->timeout;
 399
 400         err = host1x_job_pin(job, context->client->base.dev);
 401         if (err)
 402                 goto fail;
 403
 404         err = host1x_job_submit(job);
 405         if (err)
 406                 goto fail_submit;
 407
 408         args->fence = job->syncpt_end;
 409
 410         host1x_job_put(job);
 411         return 0;
 412
 413 fail_submit:
 414         host1x_job_unpin(job);
 415 fail:
 416         host1x_job_put(job);
 417         return err;
 418 }
 419
 420
 421 #ifdef CONFIG_DRM_TEGRA_STAGING
 422 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
 423 {
 424         return (struct tegra_drm_context *)(uintptr_t)context;
 425 }
 426
 427 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
 428                                         struct tegra_drm_context *context)
 429 {
 430         struct tegra_drm_context *ctx;
 431
 432         list_for_each_entry(ctx, &file->contexts, list)
 433                 if (ctx == context)
 434                         return true;
 435
 436         return false;
 437 }
 438
 439 static int tegra_gem_create(struct drm_device *drm, void *data,
 440                             struct drm_file *file)
 441 {
 442         struct drm_tegra_gem_create *args = data;
 443         struct tegra_bo *bo;
 444
 445         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
 446                                          &args->handle);
 447         if (IS_ERR(bo))
 448                 return PTR_ERR(bo);
 449
 450         return 0;
 451 }
 452
 453 static int tegra_gem_mmap(struct drm_device *drm, void *data,
 454                           struct drm_file *file)
 455 {
 456         struct drm_tegra_gem_mmap *args = data;
 457         struct drm_gem_object *gem;
 458         struct tegra_bo *bo;
 459
 460         gem = drm_gem_object_lookup(drm, file, args->handle);
 461         if (!gem)
 462                 return -EINVAL;
 463
 464         bo = to_tegra_bo(gem);
 465
 466         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
 467
 468         drm_gem_object_unreference(gem);
 469
 470         return 0;
 471 }
 472
 473 static int tegra_syncpt_read(struct drm_device *drm, void *data,
 474                              struct drm_file *file)
 475 {
 476         struct host1x *host = dev_get_drvdata(drm->dev->parent);
 477         struct drm_tegra_syncpt_read *args = data;
 478         struct host1x_syncpt *sp;
 479
 480         sp = host1x_syncpt_get(host, args->id);
 481         if (!sp)
 482                 return -EINVAL;
 483
 484         args->value = host1x_syncpt_read_min(sp);
 485         return 0;
 486 }
 487
 488 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
 489                              struct drm_file *file)
 490 {
 491         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 492         struct drm_tegra_syncpt_incr *args = data;
 493         struct host1x_syncpt *sp;
 494
 495         sp = host1x_syncpt_get(host1x, args->id);
 496         if (!sp)
 497                 return -EINVAL;
 498
 499         return host1x_syncpt_incr(sp);
 500 }
 501
 502 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
 503                              struct drm_file *file)
 504 {
 505         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 506         struct drm_tegra_syncpt_wait *args = data;
 507         struct host1x_syncpt *sp;
 508
 509         sp = host1x_syncpt_get(host1x, args->id);
 510         if (!sp)
 511                 return -EINVAL;
 512
 513         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
 514                                   &args->value);
 515 }
 516
 517 static int tegra_open_channel(struct drm_device *drm, void *data,
 518                               struct drm_file *file)
 519 {
 520         struct tegra_drm_file *fpriv = file->driver_priv;
 521         struct tegra_drm *tegra = drm->dev_private;
 522         struct drm_tegra_open_channel *args = data;
 523         struct tegra_drm_context *context;
 524         struct tegra_drm_client *client;
 525         int err = -ENODEV;
 526
 527         context = kzalloc(sizeof(*context), GFP_KERNEL);
 528         if (!context)
 529                 return -ENOMEM;
 530
 531         list_for_each_entry(client, &tegra->clients, list)
 532                 if (client->base.class == args->client) {
 533                         err = client->ops->open_channel(client, context);
 534                         if (err)
 535                                 break;
 536
 537                         list_add(&context->list, &fpriv->contexts);
 538                         args->context = (uintptr_t)context;
 539                         context->client = client;
 540                         return 0;
 541                 }
 542
 543         kfree(context);
 544         return err;
 545 }
 546
 547 static int tegra_close_channel(struct drm_device *drm, void *data,
 548                                struct drm_file *file)
 549 {
 550         struct tegra_drm_file *fpriv = file->driver_priv;
 551         struct drm_tegra_close_channel *args = data;
 552         struct tegra_drm_context *context;
 553
 554         context = tegra_drm_get_context(args->context);
 555
 556         if (!tegra_drm_file_owns_context(fpriv, context))
 557                 return -EINVAL;
 558
 559         list_del(&context->list);
 560         tegra_drm_context_free(context);
 561
 562         return 0;
 563 }
 564
 565 static int tegra_get_syncpt(struct drm_device *drm, void *data,
 566                             struct drm_file *file)
 567 {
 568         struct tegra_drm_file *fpriv = file->driver_priv;
 569         struct drm_tegra_get_syncpt *args = data;
 570         struct tegra_drm_context *context;
 571         struct host1x_syncpt *syncpt;
 572
 573         context = tegra_drm_get_context(args->context);
 574
 575         if (!tegra_drm_file_owns_context(fpriv, context))
 576                 return -ENODEV;
 577
 578         if (args->index >= context->client->base.num_syncpts)
 579                 return -EINVAL;
 580
 581         syncpt = context->client->base.syncpts[args->index];
 582         args->id = host1x_syncpt_id(syncpt);
 583
 584         return 0;
 585 }
 586
 587 static int tegra_submit(struct drm_device *drm, void *data,
 588                         struct drm_file *file)
 589 {
 590         struct tegra_drm_file *fpriv = file->driver_priv;
 591         struct drm_tegra_submit *args = data;
 592         struct tegra_drm_context *context;
 593
 594         context = tegra_drm_get_context(args->context);
 595
 596         if (!tegra_drm_file_owns_context(fpriv, context))
 597                 return -ENODEV;
 598
 599         return context->client->ops->submit(context, args, drm, file);
 600 }
 601
 602 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
 603                                  struct drm_file *file)
 604 {
 605         struct tegra_drm_file *fpriv = file->driver_priv;
 606         struct drm_tegra_get_syncpt_base *args = data;
 607         struct tegra_drm_context *context;
 608         struct host1x_syncpt_base *base;
 609         struct host1x_syncpt *syncpt;
 610
 611         context = tegra_drm_get_context(args->context);
 612
 613         if (!tegra_drm_file_owns_context(fpriv, context))
 614                 return -ENODEV;
 615
 616         if (args->syncpt >= context->client->base.num_syncpts)
 617                 return -EINVAL;
 618
 619         syncpt = context->client->base.syncpts[args->syncpt];
 620
 621         base = host1x_syncpt_get_base(syncpt);
 622         if (!base)
 623                 return -ENXIO;
 624
 625         args->id = host1x_syncpt_base_id(base);
 626
 627         return 0;
 628 }
 629
 630 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
 631                                 struct drm_file *file)
 632 {
 633         struct drm_tegra_gem_set_tiling *args = data;
 634         enum tegra_bo_tiling_mode mode;
 635         struct drm_gem_object *gem;
 636         unsigned long value = 0;
 637         struct tegra_bo *bo;
 638
 639         switch (args->mode) {
 640         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
 641                 mode = TEGRA_BO_TILING_MODE_PITCH;
 642
 643                 if (args->value != 0)
 644                         return -EINVAL;
 645
 646                 break;
 647
 648         case DRM_TEGRA_GEM_TILING_MODE_TILED:
 649                 mode = TEGRA_BO_TILING_MODE_TILED;
 650
 651                 if (args->value != 0)
 652                         return -EINVAL;
 653
 654                 break;
 655
 656         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
 657                 mode = TEGRA_BO_TILING_MODE_BLOCK;
 658
 659                 if (args->value > 5)
 660                         return -EINVAL;
 661
 662                 value = args->value;
 663                 break;
 664
 665         default:
 666                 return -EINVAL;
 667         }
 668
 669         gem = drm_gem_object_lookup(drm, file, args->handle);
 670         if (!gem)
 671                 return -ENOENT;
 672
 673         bo = to_tegra_bo(gem);
 674
 675         bo->tiling.mode = mode;
 676         bo->tiling.value = value;
 677
 678         drm_gem_object_unreference(gem);
 679
 680         return 0;
 681 }
 682
 683 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
 684                                 struct drm_file *file)
 685 {
 686         struct drm_tegra_gem_get_tiling *args = data;
 687         struct drm_gem_object *gem;
 688         struct tegra_bo *bo;
 689         int err = 0;
 690
 691         gem = drm_gem_object_lookup(drm, file, args->handle);
 692         if (!gem)
 693                 return -ENOENT;
 694
 695         bo = to_tegra_bo(gem);
 696
 697         switch (bo->tiling.mode) {
 698         case TEGRA_BO_TILING_MODE_PITCH:
 699                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
 700                 args->value = 0;
 701                 break;
 702
 703         case TEGRA_BO_TILING_MODE_TILED:
 704                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
 705                 args->value = 0;
 706                 break;
 707
 708         case TEGRA_BO_TILING_MODE_BLOCK:
 709                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
 710                 args->value = bo->tiling.value;
 711                 break;
 712
 713         default:
 714                 err = -EINVAL;
 715                 break;
 716         }
 717
 718         drm_gem_object_unreference(gem);
 719
 720         return err;
 721 }
 722
 723 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
 724                                struct drm_file *file)
 725 {
 726         struct drm_tegra_gem_set_flags *args = data;
 727         struct drm_gem_object *gem;
 728         struct tegra_bo *bo;
 729
 730         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
 731                 return -EINVAL;
 732
 733         gem = drm_gem_object_lookup(drm, file, args->handle);
 734         if (!gem)
 735                 return -ENOENT;
 736
 737         bo = to_tegra_bo(gem);
 738         bo->flags = 0;
 739
 740         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
 741                 bo->flags |= TEGRA_BO_BOTTOM_UP;
 742
 743         drm_gem_object_unreference(gem);
 744
 745         return 0;
 746 }
 747
 748 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
 749                                struct drm_file *file)
 750 {
 751         struct drm_tegra_gem_get_flags *args = data;
 752         struct drm_gem_object *gem;
 753         struct tegra_bo *bo;
 754
 755         gem = drm_gem_object_lookup(drm, file, args->handle);
 756         if (!gem)
 757                 return -ENOENT;
 758
 759         bo = to_tegra_bo(gem);
 760         args->flags = 0;
 761
 762         if (bo->flags & TEGRA_BO_BOTTOM_UP)
 763                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
 764
 765         drm_gem_object_unreference(gem);
 766
 767         return 0;
 768 }
 769 #endif
 770
 771 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
 772 #ifdef CONFIG_DRM_TEGRA_STAGING
 773         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED),
 774         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
 775         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
 776         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
 777         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
 778         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
 779         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
 780         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
 781         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
 782         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, DRM_UNLOCKED),
 783         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, DRM_UNLOCKED),
 784         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, DRM_UNLOCKED),
 785         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, DRM_UNLOCKED),
 786         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, DRM_UNLOCKED),
 787 #endif
 788 };
 789
 790 static const struct file_operations tegra_drm_fops = {
 791         .owner = THIS_MODULE,
 792         .open = drm_open,
 793         .release = drm_release,
 794         .unlocked_ioctl = drm_ioctl,
 795         .mmap = tegra_drm_mmap,
 796         .poll = drm_poll,
 797         .read = drm_read,
 798 #ifdef CONFIG_COMPAT
 799         .compat_ioctl = drm_compat_ioctl,
 800 #endif
 801         .llseek = noop_llseek,
 802 };
 803
 804 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
 805                                              unsigned int pipe)
 806 {
 807         struct drm_crtc *crtc;
 808
 809         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
 810                 if (pipe == drm_crtc_index(crtc))
 811                         return crtc;
 812         }
 813
 814         return NULL;
 815 }
 816
 817 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm, int pipe)
 818 {
 819         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 820         struct tegra_dc *dc = to_tegra_dc(crtc);
 821
 822         if (!crtc)
 823                 return 0;
 824
 825         return tegra_dc_get_vblank_counter(dc);
 826 }
 827
 828 static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
 829 {
 830         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 831         struct tegra_dc *dc = to_tegra_dc(crtc);
 832
 833         if (!crtc)
 834                 return -ENODEV;
 835
 836         tegra_dc_enable_vblank(dc);
 837
 838         return 0;
 839 }
 840
 841 static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
 842 {
 843         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 844         struct tegra_dc *dc = to_tegra_dc(crtc);
 845
 846         if (crtc)
 847                 tegra_dc_disable_vblank(dc);
 848 }
 849
 850 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
 851 {
 852         struct tegra_drm_file *fpriv = file->driver_priv;
 853         struct tegra_drm_context *context, *tmp;
 854         struct drm_crtc *crtc;
 855
 856         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 857                 tegra_dc_cancel_page_flip(crtc, file);
 858
 859         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
 860                 tegra_drm_context_free(context);
 861
 862         kfree(fpriv);
 863 }
 864
 865 #ifdef CONFIG_DEBUG_FS
 866 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
 867 {
 868         struct drm_info_node *node = (struct drm_info_node *)s->private;
 869         struct drm_device *drm = node->minor->dev;
 870         struct drm_framebuffer *fb;
 871
 872         mutex_lock(&drm->mode_config.fb_lock);
 873
 874         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
 875                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
 876                            fb->base.id, fb->width, fb->height, fb->depth,
 877                            fb->bits_per_pixel,
 878                            atomic_read(&fb->refcount.refcount));
 879         }
 880
 881         mutex_unlock(&drm->mode_config.fb_lock);
 882
 883         return 0;
 884 }
 885
 886 static int tegra_debugfs_iova(struct seq_file *s, void *data)
 887 {
 888         struct drm_info_node *node = (struct drm_info_node *)s->private;
 889         struct drm_device *drm = node->minor->dev;
 890         struct tegra_drm *tegra = drm->dev_private;
 891
 892         return drm_mm_dump_table(s, &tegra->mm);
 893 }
 894
 895 static struct drm_info_list tegra_debugfs_list[] = {
 896         { "framebuffers", tegra_debugfs_framebuffers, 0 },
 897         { "iova", tegra_debugfs_iova, 0 },
 898 };
 899
 900 static int tegra_debugfs_init(struct drm_minor *minor)
 901 {
 902         return drm_debugfs_create_files(tegra_debugfs_list,
 903                                         ARRAY_SIZE(tegra_debugfs_list),
 904                                         minor->debugfs_root, minor);
 905 }
 906
 907 static void tegra_debugfs_cleanup(struct drm_minor *minor)
 908 {
 909         drm_debugfs_remove_files(tegra_debugfs_list,
 910                                  ARRAY_SIZE(tegra_debugfs_list), minor);
 911 }
 912 #endif
 913
 914 static struct drm_driver tegra_drm_driver = {
 915         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 916         .load = tegra_drm_load,
 917         .unload = tegra_drm_unload,
 918         .open = tegra_drm_open,
 919         .preclose = tegra_drm_preclose,
 920         .lastclose = tegra_drm_lastclose,
 921
 922         .get_vblank_counter = tegra_drm_get_vblank_counter,
 923         .enable_vblank = tegra_drm_enable_vblank,
 924         .disable_vblank = tegra_drm_disable_vblank,
 925
 926 #if defined(CONFIG_DEBUG_FS)
 927         .debugfs_init = tegra_debugfs_init,
 928         .debugfs_cleanup = tegra_debugfs_cleanup,
 929 #endif
 930
 931         .gem_free_object = tegra_bo_free_object,
 932         .gem_vm_ops = &tegra_bo_vm_ops,
 933
 934         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 935         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 936         .gem_prime_export = tegra_gem_prime_export,
 937         .gem_prime_import = tegra_gem_prime_import,
 938
 939         .dumb_create = tegra_bo_dumb_create,
 940         .dumb_map_offset = tegra_bo_dumb_map_offset,
 941         .dumb_destroy = drm_gem_dumb_destroy,
 942
 943         .ioctls = tegra_drm_ioctls,
 944         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
 945         .fops = &tegra_drm_fops,
 946
 947         .name = DRIVER_NAME,
 948         .desc = DRIVER_DESC,
 949         .date = DRIVER_DATE,
 950         .major = DRIVER_MAJOR,
 951         .minor = DRIVER_MINOR,
 952         .patchlevel = DRIVER_PATCHLEVEL,
 953 };
 954
 955 int tegra_drm_register_client(struct tegra_drm *tegra,
 956                               struct tegra_drm_client *client)
 957 {
 958         mutex_lock(&tegra->clients_lock);
 959         list_add_tail(&client->list, &tegra->clients);
 960         mutex_unlock(&tegra->clients_lock);
 961
 962         return 0;
 963 }
 964
 965 int tegra_drm_unregister_client(struct tegra_drm *tegra,
 966                                 struct tegra_drm_client *client)
 967 {
 968         mutex_lock(&tegra->clients_lock);
 969         list_del_init(&client->list);
 970         mutex_unlock(&tegra->clients_lock);
 971
 972         return 0;
 973 }
 974
 975 static int host1x_drm_probe(struct host1x_device *dev)
 976 {
 977         struct drm_driver *driver = &tegra_drm_driver;
 978         struct drm_device *drm;
 979         int err;
 980
 981         drm = drm_dev_alloc(driver, &dev->dev);
 982         if (!drm)
 983                 return -ENOMEM;
 984
 985         drm_dev_set_unique(drm, dev_name(&dev->dev));
 986         dev_set_drvdata(&dev->dev, drm);
 987
 988         err = drm_dev_register(drm, 0);
 989         if (err < 0)
 990                 goto unref;
 991
 992         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
 993                  driver->major, driver->minor, driver->patchlevel,
 994                  driver->date, drm->primary->index);
 995
 996         return 0;
 997
 998 unref:
 999         drm_dev_unref(drm);
1000         return err;
1001 }
1002
1003 static int host1x_drm_remove(struct host1x_device *dev)
1004 {
1005         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1006
1007         drm_dev_unregister(drm);
1008         drm_dev_unref(drm);
1009
1010         return 0;
1011 }
1012
1013 #ifdef CONFIG_PM_SLEEP
1014 static int host1x_drm_suspend(struct device *dev)
1015 {
1016         struct drm_device *drm = dev_get_drvdata(dev);
1017
1018         drm_kms_helper_poll_disable(drm);
1019
1020         return 0;
1021 }
1022
1023 static int host1x_drm_resume(struct device *dev)
1024 {
1025         struct drm_device *drm = dev_get_drvdata(dev);
1026
1027         drm_kms_helper_poll_enable(drm);
1028
1029         return 0;
1030 }
1031 #endif
1032
1033 static const struct dev_pm_ops host1x_drm_pm_ops = {
1034         SET_SYSTEM_SLEEP_PM_OPS(host1x_drm_suspend, host1x_drm_resume)
1035 };
1036
1037 static const struct of_device_id host1x_drm_subdevs[] = {
1038         { .compatible = "nvidia,tegra20-dc", },
1039         { .compatible = "nvidia,tegra20-hdmi", },
1040         { .compatible = "nvidia,tegra20-gr2d", },
1041         { .compatible = "nvidia,tegra20-gr3d", },
1042         { .compatible = "nvidia,tegra30-dc", },
1043         { .compatible = "nvidia,tegra30-hdmi", },
1044         { .compatible = "nvidia,tegra30-gr2d", },
1045         { .compatible = "nvidia,tegra30-gr3d", },
1046         { .compatible = "nvidia,tegra114-dsi", },
1047         { .compatible = "nvidia,tegra114-hdmi", },
1048         { .compatible = "nvidia,tegra114-gr3d", },
1049         { .compatible = "nvidia,tegra124-dc", },
1050         { .compatible = "nvidia,tegra124-sor", },
1051         { .compatible = "nvidia,tegra124-hdmi", },
1052         { /* sentinel */ }
1053 };
1054
1055 static struct host1x_driver host1x_drm_driver = {
1056         .driver = {
1057                 .name = "drm",
1058                 .pm = &host1x_drm_pm_ops,
1059         },
1060         .probe = host1x_drm_probe,
1061         .remove = host1x_drm_remove,
1062         .subdevs = host1x_drm_subdevs,
1063 };
1064
1065 static int __init host1x_drm_init(void)
1066 {
1067         int err;
1068
1069         err = host1x_driver_register(&host1x_drm_driver);
1070         if (err < 0)
1071                 return err;
1072
1073         err = platform_driver_register(&tegra_dc_driver);
1074         if (err < 0)
1075                 goto unregister_host1x;
1076
1077         err = platform_driver_register(&tegra_dsi_driver);
1078         if (err < 0)
1079                 goto unregister_dc;
1080
1081         err = platform_driver_register(&tegra_sor_driver);
1082         if (err < 0)
1083                 goto unregister_dsi;
1084
1085         err = platform_driver_register(&tegra_hdmi_driver);
1086         if (err < 0)
1087                 goto unregister_sor;
1088
1089         err = platform_driver_register(&tegra_dpaux_driver);
1090         if (err < 0)
1091                 goto unregister_hdmi;
1092
1093         err = platform_driver_register(&tegra_gr2d_driver);
1094         if (err < 0)
1095                 goto unregister_dpaux;
1096
1097         err = platform_driver_register(&tegra_gr3d_driver);
1098         if (err < 0)
1099                 goto unregister_gr2d;
1100
1101         return 0;
1102
1103 unregister_gr2d:
1104         platform_driver_unregister(&tegra_gr2d_driver);
1105 unregister_dpaux:
1106         platform_driver_unregister(&tegra_dpaux_driver);
1107 unregister_hdmi:
1108         platform_driver_unregister(&tegra_hdmi_driver);
1109 unregister_sor:
1110         platform_driver_unregister(&tegra_sor_driver);
1111 unregister_dsi:
1112         platform_driver_unregister(&tegra_dsi_driver);
1113 unregister_dc:
1114         platform_driver_unregister(&tegra_dc_driver);
1115 unregister_host1x:
1116         host1x_driver_unregister(&host1x_drm_driver);
1117         return err;
1118 }
1119 module_init(host1x_drm_init);
1120
1121 static void __exit host1x_drm_exit(void)
1122 {
1123         platform_driver_unregister(&tegra_gr3d_driver);
1124         platform_driver_unregister(&tegra_gr2d_driver);
1125         platform_driver_unregister(&tegra_dpaux_driver);
1126         platform_driver_unregister(&tegra_hdmi_driver);
1127         platform_driver_unregister(&tegra_sor_driver);
1128         platform_driver_unregister(&tegra_dsi_driver);
1129         platform_driver_unregister(&tegra_dc_driver);
1130         host1x_driver_unregister(&host1x_drm_driver);
1131 }
1132 module_exit(host1x_drm_exit);
1133
1134 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1135 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1136 MODULE_LICENSE("GPL v2");