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, false);
  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         /*
 175          * We don't use the drm_irq_install() helpers provided by the DRM
 176          * core, so we need to set this manually in order to allow the
 177          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 178          */
 179         drm->irq_enabled = true;
 180
 181         /* syncpoints are used for full 32-bit hardware VBLANK counters */
 182         drm->max_vblank_count = 0xffffffff;
 183         drm->vblank_disable_allowed = true;
 184
 185         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
 186         if (err < 0)
 187                 goto device;
 188
 189         drm_mode_config_reset(drm);
 190
 191         err = tegra_drm_fb_init(drm);
 192         if (err < 0)
 193                 goto vblank;
 194
 195         return 0;
 196
 197 vblank:
 198         drm_vblank_cleanup(drm);
 199 device:
 200         host1x_device_exit(device);
 201 fbdev:
 202         drm_kms_helper_poll_fini(drm);
 203         tegra_drm_fb_free(drm);
 204 config:
 205         drm_mode_config_cleanup(drm);
 206
 207         if (tegra->domain) {
 208                 iommu_domain_free(tegra->domain);
 209                 drm_mm_takedown(&tegra->mm);
 210         }
 211 free:
 212         kfree(tegra);
 213         return err;
 214 }
 215
 216 static int tegra_drm_unload(struct drm_device *drm)
 217 {
 218         struct host1x_device *device = to_host1x_device(drm->dev);
 219         struct tegra_drm *tegra = drm->dev_private;
 220         int err;
 221
 222         drm_kms_helper_poll_fini(drm);
 223         tegra_drm_fb_exit(drm);
 224         drm_mode_config_cleanup(drm);
 225         drm_vblank_cleanup(drm);
 226
 227         err = host1x_device_exit(device);
 228         if (err < 0)
 229                 return err;
 230
 231         if (tegra->domain) {
 232                 iommu_domain_free(tegra->domain);
 233                 drm_mm_takedown(&tegra->mm);
 234         }
 235
 236         kfree(tegra);
 237
 238         return 0;
 239 }
 240
 241 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
 242 {
 243         struct tegra_drm_file *fpriv;
 244
 245         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
 246         if (!fpriv)
 247                 return -ENOMEM;
 248
 249         INIT_LIST_HEAD(&fpriv->contexts);
 250         filp->driver_priv = fpriv;
 251
 252         return 0;
 253 }
 254
 255 static void tegra_drm_context_free(struct tegra_drm_context *context)
 256 {
 257         context->client->ops->close_channel(context);
 258         kfree(context);
 259 }
 260
 261 static void tegra_drm_lastclose(struct drm_device *drm)
 262 {
 263 #ifdef CONFIG_DRM_TEGRA_FBDEV
 264         struct tegra_drm *tegra = drm->dev_private;
 265
 266         tegra_fbdev_restore_mode(tegra->fbdev);
 267 #endif
 268 }
 269
 270 static struct host1x_bo *
 271 host1x_bo_lookup(struct drm_device *drm, struct drm_file *file, u32 handle)
 272 {
 273         struct drm_gem_object *gem;
 274         struct tegra_bo *bo;
 275
 276         gem = drm_gem_object_lookup(drm, file, handle);
 277         if (!gem)
 278                 return NULL;
 279
 280         mutex_lock(&drm->struct_mutex);
 281         drm_gem_object_unreference(gem);
 282         mutex_unlock(&drm->struct_mutex);
 283
 284         bo = to_tegra_bo(gem);
 285         return &bo->base;
 286 }
 287
 288 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
 289                                        struct drm_tegra_reloc __user *src,
 290                                        struct drm_device *drm,
 291                                        struct drm_file *file)
 292 {
 293         u32 cmdbuf, target;
 294         int err;
 295
 296         err = get_user(cmdbuf, &src->cmdbuf.handle);
 297         if (err < 0)
 298                 return err;
 299
 300         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
 301         if (err < 0)
 302                 return err;
 303
 304         err = get_user(target, &src->target.handle);
 305         if (err < 0)
 306                 return err;
 307
 308         err = get_user(dest->target.offset, &src->target.offset);
 309         if (err < 0)
 310                 return err;
 311
 312         err = get_user(dest->shift, &src->shift);
 313         if (err < 0)
 314                 return err;
 315
 316         dest->cmdbuf.bo = host1x_bo_lookup(drm, file, cmdbuf);
 317         if (!dest->cmdbuf.bo)
 318                 return -ENOENT;
 319
 320         dest->target.bo = host1x_bo_lookup(drm, file, target);
 321         if (!dest->target.bo)
 322                 return -ENOENT;
 323
 324         return 0;
 325 }
 326
 327 int tegra_drm_submit(struct tegra_drm_context *context,
 328                      struct drm_tegra_submit *args, struct drm_device *drm,
 329                      struct drm_file *file)
 330 {
 331         unsigned int num_cmdbufs = args->num_cmdbufs;
 332         unsigned int num_relocs = args->num_relocs;
 333         unsigned int num_waitchks = args->num_waitchks;
 334         struct drm_tegra_cmdbuf __user *cmdbufs =
 335                 (void __user *)(uintptr_t)args->cmdbufs;
 336         struct drm_tegra_reloc __user *relocs =
 337                 (void __user *)(uintptr_t)args->relocs;
 338         struct drm_tegra_waitchk __user *waitchks =
 339                 (void __user *)(uintptr_t)args->waitchks;
 340         struct drm_tegra_syncpt syncpt;
 341         struct host1x_job *job;
 342         int err;
 343
 344         /* We don't yet support other than one syncpt_incr struct per submit */
 345         if (args->num_syncpts != 1)
 346                 return -EINVAL;
 347
 348         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
 349                                args->num_relocs, args->num_waitchks);
 350         if (!job)
 351                 return -ENOMEM;
 352
 353         job->num_relocs = args->num_relocs;
 354         job->num_waitchk = args->num_waitchks;
 355         job->client = (u32)args->context;
 356         job->class = context->client->base.class;
 357         job->serialize = true;
 358
 359         while (num_cmdbufs) {
 360                 struct drm_tegra_cmdbuf cmdbuf;
 361                 struct host1x_bo *bo;
 362
 363                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
 364                         err = -EFAULT;
 365                         goto fail;
 366                 }
 367
 368                 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
 369                 if (!bo) {
 370                         err = -ENOENT;
 371                         goto fail;
 372                 }
 373
 374                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
 375                 num_cmdbufs--;
 376                 cmdbufs++;
 377         }
 378
 379         /* copy and resolve relocations from submit */
 380         while (num_relocs--) {
 381                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
 382                                                   &relocs[num_relocs], drm,
 383                                                   file);
 384                 if (err < 0)
 385                         goto fail;
 386         }
 387
 388         if (copy_from_user(job->waitchk, waitchks,
 389                            sizeof(*waitchks) * num_waitchks)) {
 390                 err = -EFAULT;
 391                 goto fail;
 392         }
 393
 394         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
 395                            sizeof(syncpt))) {
 396                 err = -EFAULT;
 397                 goto fail;
 398         }
 399
 400         job->is_addr_reg = context->client->ops->is_addr_reg;
 401         job->syncpt_incrs = syncpt.incrs;
 402         job->syncpt_id = syncpt.id;
 403         job->timeout = 10000;
 404
 405         if (args->timeout && args->timeout < 10000)
 406                 job->timeout = args->timeout;
 407
 408         err = host1x_job_pin(job, context->client->base.dev);
 409         if (err)
 410                 goto fail;
 411
 412         err = host1x_job_submit(job);
 413         if (err)
 414                 goto fail_submit;
 415
 416         args->fence = job->syncpt_end;
 417
 418         host1x_job_put(job);
 419         return 0;
 420
 421 fail_submit:
 422         host1x_job_unpin(job);
 423 fail:
 424         host1x_job_put(job);
 425         return err;
 426 }
 427
 428
 429 #ifdef CONFIG_DRM_TEGRA_STAGING
 430 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
 431 {
 432         return (struct tegra_drm_context *)(uintptr_t)context;
 433 }
 434
 435 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
 436                                         struct tegra_drm_context *context)
 437 {
 438         struct tegra_drm_context *ctx;
 439
 440         list_for_each_entry(ctx, &file->contexts, list)
 441                 if (ctx == context)
 442                         return true;
 443
 444         return false;
 445 }
 446
 447 static int tegra_gem_create(struct drm_device *drm, void *data,
 448                             struct drm_file *file)
 449 {
 450         struct drm_tegra_gem_create *args = data;
 451         struct tegra_bo *bo;
 452
 453         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
 454                                          &args->handle);
 455         if (IS_ERR(bo))
 456                 return PTR_ERR(bo);
 457
 458         return 0;
 459 }
 460
 461 static int tegra_gem_mmap(struct drm_device *drm, void *data,
 462                           struct drm_file *file)
 463 {
 464         struct drm_tegra_gem_mmap *args = data;
 465         struct drm_gem_object *gem;
 466         struct tegra_bo *bo;
 467
 468         gem = drm_gem_object_lookup(drm, file, args->handle);
 469         if (!gem)
 470                 return -EINVAL;
 471
 472         bo = to_tegra_bo(gem);
 473
 474         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
 475
 476         drm_gem_object_unreference(gem);
 477
 478         return 0;
 479 }
 480
 481 static int tegra_syncpt_read(struct drm_device *drm, void *data,
 482                              struct drm_file *file)
 483 {
 484         struct host1x *host = dev_get_drvdata(drm->dev->parent);
 485         struct drm_tegra_syncpt_read *args = data;
 486         struct host1x_syncpt *sp;
 487
 488         sp = host1x_syncpt_get(host, args->id);
 489         if (!sp)
 490                 return -EINVAL;
 491
 492         args->value = host1x_syncpt_read_min(sp);
 493         return 0;
 494 }
 495
 496 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
 497                              struct drm_file *file)
 498 {
 499         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 500         struct drm_tegra_syncpt_incr *args = data;
 501         struct host1x_syncpt *sp;
 502
 503         sp = host1x_syncpt_get(host1x, args->id);
 504         if (!sp)
 505                 return -EINVAL;
 506
 507         return host1x_syncpt_incr(sp);
 508 }
 509
 510 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
 511                              struct drm_file *file)
 512 {
 513         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 514         struct drm_tegra_syncpt_wait *args = data;
 515         struct host1x_syncpt *sp;
 516
 517         sp = host1x_syncpt_get(host1x, args->id);
 518         if (!sp)
 519                 return -EINVAL;
 520
 521         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
 522                                   &args->value);
 523 }
 524
 525 static int tegra_open_channel(struct drm_device *drm, void *data,
 526                               struct drm_file *file)
 527 {
 528         struct tegra_drm_file *fpriv = file->driver_priv;
 529         struct tegra_drm *tegra = drm->dev_private;
 530         struct drm_tegra_open_channel *args = data;
 531         struct tegra_drm_context *context;
 532         struct tegra_drm_client *client;
 533         int err = -ENODEV;
 534
 535         context = kzalloc(sizeof(*context), GFP_KERNEL);
 536         if (!context)
 537                 return -ENOMEM;
 538
 539         list_for_each_entry(client, &tegra->clients, list)
 540                 if (client->base.class == args->client) {
 541                         err = client->ops->open_channel(client, context);
 542                         if (err)
 543                                 break;
 544
 545                         list_add(&context->list, &fpriv->contexts);
 546                         args->context = (uintptr_t)context;
 547                         context->client = client;
 548                         return 0;
 549                 }
 550
 551         kfree(context);
 552         return err;
 553 }
 554
 555 static int tegra_close_channel(struct drm_device *drm, void *data,
 556                                struct drm_file *file)
 557 {
 558         struct tegra_drm_file *fpriv = file->driver_priv;
 559         struct drm_tegra_close_channel *args = data;
 560         struct tegra_drm_context *context;
 561
 562         context = tegra_drm_get_context(args->context);
 563
 564         if (!tegra_drm_file_owns_context(fpriv, context))
 565                 return -EINVAL;
 566
 567         list_del(&context->list);
 568         tegra_drm_context_free(context);
 569
 570         return 0;
 571 }
 572
 573 static int tegra_get_syncpt(struct drm_device *drm, void *data,
 574                             struct drm_file *file)
 575 {
 576         struct tegra_drm_file *fpriv = file->driver_priv;
 577         struct drm_tegra_get_syncpt *args = data;
 578         struct tegra_drm_context *context;
 579         struct host1x_syncpt *syncpt;
 580
 581         context = tegra_drm_get_context(args->context);
 582
 583         if (!tegra_drm_file_owns_context(fpriv, context))
 584                 return -ENODEV;
 585
 586         if (args->index >= context->client->base.num_syncpts)
 587                 return -EINVAL;
 588
 589         syncpt = context->client->base.syncpts[args->index];
 590         args->id = host1x_syncpt_id(syncpt);
 591
 592         return 0;
 593 }
 594
 595 static int tegra_submit(struct drm_device *drm, void *data,
 596                         struct drm_file *file)
 597 {
 598         struct tegra_drm_file *fpriv = file->driver_priv;
 599         struct drm_tegra_submit *args = data;
 600         struct tegra_drm_context *context;
 601
 602         context = tegra_drm_get_context(args->context);
 603
 604         if (!tegra_drm_file_owns_context(fpriv, context))
 605                 return -ENODEV;
 606
 607         return context->client->ops->submit(context, args, drm, file);
 608 }
 609
 610 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
 611                                  struct drm_file *file)
 612 {
 613         struct tegra_drm_file *fpriv = file->driver_priv;
 614         struct drm_tegra_get_syncpt_base *args = data;
 615         struct tegra_drm_context *context;
 616         struct host1x_syncpt_base *base;
 617         struct host1x_syncpt *syncpt;
 618
 619         context = tegra_drm_get_context(args->context);
 620
 621         if (!tegra_drm_file_owns_context(fpriv, context))
 622                 return -ENODEV;
 623
 624         if (args->syncpt >= context->client->base.num_syncpts)
 625                 return -EINVAL;
 626
 627         syncpt = context->client->base.syncpts[args->syncpt];
 628
 629         base = host1x_syncpt_get_base(syncpt);
 630         if (!base)
 631                 return -ENXIO;
 632
 633         args->id = host1x_syncpt_base_id(base);
 634
 635         return 0;
 636 }
 637
 638 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
 639                                 struct drm_file *file)
 640 {
 641         struct drm_tegra_gem_set_tiling *args = data;
 642         enum tegra_bo_tiling_mode mode;
 643         struct drm_gem_object *gem;
 644         unsigned long value = 0;
 645         struct tegra_bo *bo;
 646
 647         switch (args->mode) {
 648         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
 649                 mode = TEGRA_BO_TILING_MODE_PITCH;
 650
 651                 if (args->value != 0)
 652                         return -EINVAL;
 653
 654                 break;
 655
 656         case DRM_TEGRA_GEM_TILING_MODE_TILED:
 657                 mode = TEGRA_BO_TILING_MODE_TILED;
 658
 659                 if (args->value != 0)
 660                         return -EINVAL;
 661
 662                 break;
 663
 664         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
 665                 mode = TEGRA_BO_TILING_MODE_BLOCK;
 666
 667                 if (args->value > 5)
 668                         return -EINVAL;
 669
 670                 value = args->value;
 671                 break;
 672
 673         default:
 674                 return -EINVAL;
 675         }
 676
 677         gem = drm_gem_object_lookup(drm, file, args->handle);
 678         if (!gem)
 679                 return -ENOENT;
 680
 681         bo = to_tegra_bo(gem);
 682
 683         bo->tiling.mode = mode;
 684         bo->tiling.value = value;
 685
 686         drm_gem_object_unreference(gem);
 687
 688         return 0;
 689 }
 690
 691 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
 692                                 struct drm_file *file)
 693 {
 694         struct drm_tegra_gem_get_tiling *args = data;
 695         struct drm_gem_object *gem;
 696         struct tegra_bo *bo;
 697         int err = 0;
 698
 699         gem = drm_gem_object_lookup(drm, file, args->handle);
 700         if (!gem)
 701                 return -ENOENT;
 702
 703         bo = to_tegra_bo(gem);
 704
 705         switch (bo->tiling.mode) {
 706         case TEGRA_BO_TILING_MODE_PITCH:
 707                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
 708                 args->value = 0;
 709                 break;
 710
 711         case TEGRA_BO_TILING_MODE_TILED:
 712                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
 713                 args->value = 0;
 714                 break;
 715
 716         case TEGRA_BO_TILING_MODE_BLOCK:
 717                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
 718                 args->value = bo->tiling.value;
 719                 break;
 720
 721         default:
 722                 err = -EINVAL;
 723                 break;
 724         }
 725
 726         drm_gem_object_unreference(gem);
 727
 728         return err;
 729 }
 730
 731 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
 732                                struct drm_file *file)
 733 {
 734         struct drm_tegra_gem_set_flags *args = data;
 735         struct drm_gem_object *gem;
 736         struct tegra_bo *bo;
 737
 738         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
 739                 return -EINVAL;
 740
 741         gem = drm_gem_object_lookup(drm, file, args->handle);
 742         if (!gem)
 743                 return -ENOENT;
 744
 745         bo = to_tegra_bo(gem);
 746         bo->flags = 0;
 747
 748         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
 749                 bo->flags |= TEGRA_BO_BOTTOM_UP;
 750
 751         drm_gem_object_unreference(gem);
 752
 753         return 0;
 754 }
 755
 756 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
 757                                struct drm_file *file)
 758 {
 759         struct drm_tegra_gem_get_flags *args = data;
 760         struct drm_gem_object *gem;
 761         struct tegra_bo *bo;
 762
 763         gem = drm_gem_object_lookup(drm, file, args->handle);
 764         if (!gem)
 765                 return -ENOENT;
 766
 767         bo = to_tegra_bo(gem);
 768         args->flags = 0;
 769
 770         if (bo->flags & TEGRA_BO_BOTTOM_UP)
 771                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
 772
 773         drm_gem_object_unreference(gem);
 774
 775         return 0;
 776 }
 777 #endif
 778
 779 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
 780 #ifdef CONFIG_DRM_TEGRA_STAGING
 781         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, 0),
 782         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, 0),
 783         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, 0),
 784         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, 0),
 785         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, 0),
 786         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, 0),
 787         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, 0),
 788         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, 0),
 789         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, 0),
 790         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, 0),
 791         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, 0),
 792         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, 0),
 793         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, 0),
 794         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, 0),
 795 #endif
 796 };
 797
 798 static const struct file_operations tegra_drm_fops = {
 799         .owner = THIS_MODULE,
 800         .open = drm_open,
 801         .release = drm_release,
 802         .unlocked_ioctl = drm_ioctl,
 803         .mmap = tegra_drm_mmap,
 804         .poll = drm_poll,
 805         .read = drm_read,
 806 #ifdef CONFIG_COMPAT
 807         .compat_ioctl = drm_compat_ioctl,
 808 #endif
 809         .llseek = noop_llseek,
 810 };
 811
 812 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
 813                                              unsigned int pipe)
 814 {
 815         struct drm_crtc *crtc;
 816
 817         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
 818                 if (pipe == drm_crtc_index(crtc))
 819                         return crtc;
 820         }
 821
 822         return NULL;
 823 }
 824
 825 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm,
 826                                         unsigned int pipe)
 827 {
 828         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 829         struct tegra_dc *dc = to_tegra_dc(crtc);
 830
 831         if (!crtc)
 832                 return 0;
 833
 834         return tegra_dc_get_vblank_counter(dc);
 835 }
 836
 837 static int tegra_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
 838 {
 839         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 840         struct tegra_dc *dc = to_tegra_dc(crtc);
 841
 842         if (!crtc)
 843                 return -ENODEV;
 844
 845         tegra_dc_enable_vblank(dc);
 846
 847         return 0;
 848 }
 849
 850 static void tegra_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
 851 {
 852         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 853         struct tegra_dc *dc = to_tegra_dc(crtc);
 854
 855         if (crtc)
 856                 tegra_dc_disable_vblank(dc);
 857 }
 858
 859 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
 860 {
 861         struct tegra_drm_file *fpriv = file->driver_priv;
 862         struct tegra_drm_context *context, *tmp;
 863         struct drm_crtc *crtc;
 864
 865         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 866                 tegra_dc_cancel_page_flip(crtc, file);
 867
 868         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
 869                 tegra_drm_context_free(context);
 870
 871         kfree(fpriv);
 872 }
 873
 874 #ifdef CONFIG_DEBUG_FS
 875 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
 876 {
 877         struct drm_info_node *node = (struct drm_info_node *)s->private;
 878         struct drm_device *drm = node->minor->dev;
 879         struct drm_framebuffer *fb;
 880
 881         mutex_lock(&drm->mode_config.fb_lock);
 882
 883         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
 884                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
 885                            fb->base.id, fb->width, fb->height, fb->depth,
 886                            fb->bits_per_pixel,
 887                            atomic_read(&fb->refcount.refcount));
 888         }
 889
 890         mutex_unlock(&drm->mode_config.fb_lock);
 891
 892         return 0;
 893 }
 894
 895 static int tegra_debugfs_iova(struct seq_file *s, void *data)
 896 {
 897         struct drm_info_node *node = (struct drm_info_node *)s->private;
 898         struct drm_device *drm = node->minor->dev;
 899         struct tegra_drm *tegra = drm->dev_private;
 900
 901         return drm_mm_dump_table(s, &tegra->mm);
 902 }
 903
 904 static struct drm_info_list tegra_debugfs_list[] = {
 905         { "framebuffers", tegra_debugfs_framebuffers, 0 },
 906         { "iova", tegra_debugfs_iova, 0 },
 907 };
 908
 909 static int tegra_debugfs_init(struct drm_minor *minor)
 910 {
 911         return drm_debugfs_create_files(tegra_debugfs_list,
 912                                         ARRAY_SIZE(tegra_debugfs_list),
 913                                         minor->debugfs_root, minor);
 914 }
 915
 916 static void tegra_debugfs_cleanup(struct drm_minor *minor)
 917 {
 918         drm_debugfs_remove_files(tegra_debugfs_list,
 919                                  ARRAY_SIZE(tegra_debugfs_list), minor);
 920 }
 921 #endif
 922
 923 static struct drm_driver tegra_drm_driver = {
 924         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 925         .load = tegra_drm_load,
 926         .unload = tegra_drm_unload,
 927         .open = tegra_drm_open,
 928         .preclose = tegra_drm_preclose,
 929         .lastclose = tegra_drm_lastclose,
 930
 931         .get_vblank_counter = tegra_drm_get_vblank_counter,
 932         .enable_vblank = tegra_drm_enable_vblank,
 933         .disable_vblank = tegra_drm_disable_vblank,
 934
 935 #if defined(CONFIG_DEBUG_FS)
 936         .debugfs_init = tegra_debugfs_init,
 937         .debugfs_cleanup = tegra_debugfs_cleanup,
 938 #endif
 939
 940         .gem_free_object = tegra_bo_free_object,
 941         .gem_vm_ops = &tegra_bo_vm_ops,
 942
 943         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 944         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 945         .gem_prime_export = tegra_gem_prime_export,
 946         .gem_prime_import = tegra_gem_prime_import,
 947
 948         .dumb_create = tegra_bo_dumb_create,
 949         .dumb_map_offset = tegra_bo_dumb_map_offset,
 950         .dumb_destroy = drm_gem_dumb_destroy,
 951
 952         .ioctls = tegra_drm_ioctls,
 953         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
 954         .fops = &tegra_drm_fops,
 955
 956         .name = DRIVER_NAME,
 957         .desc = DRIVER_DESC,
 958         .date = DRIVER_DATE,
 959         .major = DRIVER_MAJOR,
 960         .minor = DRIVER_MINOR,
 961         .patchlevel = DRIVER_PATCHLEVEL,
 962 };
 963
 964 int tegra_drm_register_client(struct tegra_drm *tegra,
 965                               struct tegra_drm_client *client)
 966 {
 967         mutex_lock(&tegra->clients_lock);
 968         list_add_tail(&client->list, &tegra->clients);
 969         mutex_unlock(&tegra->clients_lock);
 970
 971         return 0;
 972 }
 973
 974 int tegra_drm_unregister_client(struct tegra_drm *tegra,
 975                                 struct tegra_drm_client *client)
 976 {
 977         mutex_lock(&tegra->clients_lock);
 978         list_del_init(&client->list);
 979         mutex_unlock(&tegra->clients_lock);
 980
 981         return 0;
 982 }
 983
 984 static int host1x_drm_probe(struct host1x_device *dev)
 985 {
 986         struct drm_driver *driver = &tegra_drm_driver;
 987         struct drm_device *drm;
 988         int err;
 989
 990         drm = drm_dev_alloc(driver, &dev->dev);
 991         if (!drm)
 992                 return -ENOMEM;
 993
 994         drm_dev_set_unique(drm, dev_name(&dev->dev));
 995         dev_set_drvdata(&dev->dev, drm);
 996
 997         err = drm_dev_register(drm, 0);
 998         if (err < 0)
 999                 goto unref;
1000
1001         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
1002                  driver->major, driver->minor, driver->patchlevel,
1003                  driver->date, drm->primary->index);
1004
1005         return 0;
1006
1007 unref:
1008         drm_dev_unref(drm);
1009         return err;
1010 }
1011
1012 static int host1x_drm_remove(struct host1x_device *dev)
1013 {
1014         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1015
1016         drm_dev_unregister(drm);
1017         drm_dev_unref(drm);
1018
1019         return 0;
1020 }
1021
1022 #ifdef CONFIG_PM_SLEEP
1023 static int host1x_drm_suspend(struct device *dev)
1024 {
1025         struct drm_device *drm = dev_get_drvdata(dev);
1026
1027         drm_kms_helper_poll_disable(drm);
1028
1029         return 0;
1030 }
1031
1032 static int host1x_drm_resume(struct device *dev)
1033 {
1034         struct drm_device *drm = dev_get_drvdata(dev);
1035
1036         drm_kms_helper_poll_enable(drm);
1037
1038         return 0;
1039 }
1040 #endif
1041
1042 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1043                          host1x_drm_resume);
1044
1045 static const struct of_device_id host1x_drm_subdevs[] = {
1046         { .compatible = "nvidia,tegra20-dc", },
1047         { .compatible = "nvidia,tegra20-hdmi", },
1048         { .compatible = "nvidia,tegra20-gr2d", },
1049         { .compatible = "nvidia,tegra20-gr3d", },
1050         { .compatible = "nvidia,tegra30-dc", },
1051         { .compatible = "nvidia,tegra30-hdmi", },
1052         { .compatible = "nvidia,tegra30-gr2d", },
1053         { .compatible = "nvidia,tegra30-gr3d", },
1054         { .compatible = "nvidia,tegra114-dsi", },
1055         { .compatible = "nvidia,tegra114-hdmi", },
1056         { .compatible = "nvidia,tegra114-gr3d", },
1057         { .compatible = "nvidia,tegra124-dc", },
1058         { .compatible = "nvidia,tegra124-sor", },
1059         { .compatible = "nvidia,tegra124-hdmi", },
1060         { .compatible = "nvidia,tegra124-dsi", },
1061         { .compatible = "nvidia,tegra132-dsi", },
1062         { .compatible = "nvidia,tegra210-dc", },
1063         { .compatible = "nvidia,tegra210-dsi", },
1064         { .compatible = "nvidia,tegra210-sor", },
1065         { .compatible = "nvidia,tegra210-sor1", },
1066         { /* sentinel */ }
1067 };
1068
1069 static struct host1x_driver host1x_drm_driver = {
1070         .driver = {
1071                 .name = "drm",
1072                 .pm = &host1x_drm_pm_ops,
1073         },
1074         .probe = host1x_drm_probe,
1075         .remove = host1x_drm_remove,
1076         .subdevs = host1x_drm_subdevs,
1077 };
1078
1079 static int __init host1x_drm_init(void)
1080 {
1081         int err;
1082
1083         err = host1x_driver_register(&host1x_drm_driver);
1084         if (err < 0)
1085                 return err;
1086
1087         err = platform_driver_register(&tegra_dc_driver);
1088         if (err < 0)
1089                 goto unregister_host1x;
1090
1091         err = platform_driver_register(&tegra_dsi_driver);
1092         if (err < 0)
1093                 goto unregister_dc;
1094
1095         err = platform_driver_register(&tegra_sor_driver);
1096         if (err < 0)
1097                 goto unregister_dsi;
1098
1099         err = platform_driver_register(&tegra_hdmi_driver);
1100         if (err < 0)
1101                 goto unregister_sor;
1102
1103         err = platform_driver_register(&tegra_dpaux_driver);
1104         if (err < 0)
1105                 goto unregister_hdmi;
1106
1107         err = platform_driver_register(&tegra_gr2d_driver);
1108         if (err < 0)
1109                 goto unregister_dpaux;
1110
1111         err = platform_driver_register(&tegra_gr3d_driver);
1112         if (err < 0)
1113                 goto unregister_gr2d;
1114
1115         return 0;
1116
1117 unregister_gr2d:
1118         platform_driver_unregister(&tegra_gr2d_driver);
1119 unregister_dpaux:
1120         platform_driver_unregister(&tegra_dpaux_driver);
1121 unregister_hdmi:
1122         platform_driver_unregister(&tegra_hdmi_driver);
1123 unregister_sor:
1124         platform_driver_unregister(&tegra_sor_driver);
1125 unregister_dsi:
1126         platform_driver_unregister(&tegra_dsi_driver);
1127 unregister_dc:
1128         platform_driver_unregister(&tegra_dc_driver);
1129 unregister_host1x:
1130         host1x_driver_unregister(&host1x_drm_driver);
1131         return err;
1132 }
1133 module_init(host1x_drm_init);
1134
1135 static void __exit host1x_drm_exit(void)
1136 {
1137         platform_driver_unregister(&tegra_gr3d_driver);
1138         platform_driver_unregister(&tegra_gr2d_driver);
1139         platform_driver_unregister(&tegra_dpaux_driver);
1140         platform_driver_unregister(&tegra_hdmi_driver);
1141         platform_driver_unregister(&tegra_sor_driver);
1142         platform_driver_unregister(&tegra_dsi_driver);
1143         platform_driver_unregister(&tegra_dc_driver);
1144         host1x_driver_unregister(&host1x_drm_driver);
1145 }
1146 module_exit(host1x_drm_exit);
1147
1148 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1149 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1150 MODULE_LICENSE("GPL v2");