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