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