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_modeset_enables(drm, state);
  60         drm_atomic_helper_commit_planes(drm, state,
  61                                         DRM_PLANE_COMMIT_ACTIVE_ONLY);
  62
  63         drm_atomic_helper_wait_for_vblanks(drm, state);
  64
  65         drm_atomic_helper_cleanup_planes(drm, state);
  66         drm_atomic_state_put(state);
  67 }
  68
  69 static void tegra_atomic_work(struct work_struct *work)
  70 {
  71         struct tegra_drm *tegra = container_of(work, struct tegra_drm,
  72                                                commit.work);
  73
  74         tegra_atomic_complete(tegra, tegra->commit.state);
  75 }
  76
  77 static int tegra_atomic_commit(struct drm_device *drm,
  78                                struct drm_atomic_state *state, bool nonblock)
  79 {
  80         struct tegra_drm *tegra = drm->dev_private;
  81         int err;
  82
  83         err = drm_atomic_helper_prepare_planes(drm, state);
  84         if (err)
  85                 return err;
  86
  87         /* serialize outstanding nonblocking commits */
  88         mutex_lock(&tegra->commit.lock);
  89         flush_work(&tegra->commit.work);
  90
  91         /*
  92          * This is the point of no return - everything below never fails except
  93          * when the hw goes bonghits. Which means we can commit the new state on
  94          * the software side now.
  95          */
  96
  97         drm_atomic_helper_swap_state(state, true);
  98
  99         drm_atomic_state_get(state);
 100         if (nonblock)
 101                 tegra_atomic_schedule(tegra, state);
 102         else
 103                 tegra_atomic_complete(tegra, state);
 104
 105         mutex_unlock(&tegra->commit.lock);
 106         return 0;
 107 }
 108
 109 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
 110         .fb_create = tegra_fb_create,
 111 #ifdef CONFIG_DRM_FBDEV_EMULATION
 112         .output_poll_changed = tegra_fb_output_poll_changed,
 113 #endif
 114         .atomic_check = drm_atomic_helper_check,
 115         .atomic_commit = tegra_atomic_commit,
 116 };
 117
 118 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
 119 {
 120         struct host1x_device *device = to_host1x_device(drm->dev);
 121         struct tegra_drm *tegra;
 122         int err;
 123
 124         tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
 125         if (!tegra)
 126                 return -ENOMEM;
 127
 128         if (iommu_present(&platform_bus_type)) {
 129                 struct iommu_domain_geometry *geometry;
 130                 u64 start, end;
 131
 132                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
 133                 if (!tegra->domain) {
 134                         err = -ENOMEM;
 135                         goto free;
 136                 }
 137
 138                 geometry = &tegra->domain->geometry;
 139                 start = geometry->aperture_start;
 140                 end = geometry->aperture_end;
 141
 142                 DRM_DEBUG_DRIVER("IOMMU aperture initialized (%#llx-%#llx)\n",
 143                                  start, end);
 144                 drm_mm_init(&tegra->mm, start, end - start + 1);
 145                 mutex_init(&tegra->mm_lock);
 146         }
 147
 148         mutex_init(&tegra->clients_lock);
 149         INIT_LIST_HEAD(&tegra->clients);
 150
 151         mutex_init(&tegra->commit.lock);
 152         INIT_WORK(&tegra->commit.work, tegra_atomic_work);
 153
 154         drm->dev_private = tegra;
 155         tegra->drm = drm;
 156
 157         drm_mode_config_init(drm);
 158
 159         drm->mode_config.min_width = 0;
 160         drm->mode_config.min_height = 0;
 161
 162         drm->mode_config.max_width = 4096;
 163         drm->mode_config.max_height = 4096;
 164
 165         drm->mode_config.funcs = &tegra_drm_mode_funcs;
 166
 167         err = tegra_drm_fb_prepare(drm);
 168         if (err < 0)
 169                 goto config;
 170
 171         drm_kms_helper_poll_init(drm);
 172
 173         err = host1x_device_init(device);
 174         if (err < 0)
 175                 goto fbdev;
 176
 177         /*
 178          * We don't use the drm_irq_install() helpers provided by the DRM
 179          * core, so we need to set this manually in order to allow the
 180          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 181          */
 182         drm->irq_enabled = true;
 183
 184         /* syncpoints are used for full 32-bit hardware VBLANK counters */
 185         drm->max_vblank_count = 0xffffffff;
 186
 187         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
 188         if (err < 0)
 189                 goto device;
 190
 191         drm_mode_config_reset(drm);
 192
 193         err = tegra_drm_fb_init(drm);
 194         if (err < 0)
 195                 goto vblank;
 196
 197         return 0;
 198
 199 vblank:
 200         drm_vblank_cleanup(drm);
 201 device:
 202         host1x_device_exit(device);
 203 fbdev:
 204         drm_kms_helper_poll_fini(drm);
 205         tegra_drm_fb_free(drm);
 206 config:
 207         drm_mode_config_cleanup(drm);
 208
 209         if (tegra->domain) {
 210                 iommu_domain_free(tegra->domain);
 211                 drm_mm_takedown(&tegra->mm);
 212                 mutex_destroy(&tegra->mm_lock);
 213         }
 214 free:
 215         kfree(tegra);
 216         return err;
 217 }
 218
 219 static void tegra_drm_unload(struct drm_device *drm)
 220 {
 221         struct host1x_device *device = to_host1x_device(drm->dev);
 222         struct tegra_drm *tegra = drm->dev_private;
 223         int err;
 224
 225         drm_kms_helper_poll_fini(drm);
 226         tegra_drm_fb_exit(drm);
 227         drm_mode_config_cleanup(drm);
 228         drm_vblank_cleanup(drm);
 229
 230         err = host1x_device_exit(device);
 231         if (err < 0)
 232                 return;
 233
 234         if (tegra->domain) {
 235                 iommu_domain_free(tegra->domain);
 236                 drm_mm_takedown(&tegra->mm);
 237                 mutex_destroy(&tegra->mm_lock);
 238         }
 239
 240         kfree(tegra);
 241 }
 242
 243 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
 244 {
 245         struct tegra_drm_file *fpriv;
 246
 247         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
 248         if (!fpriv)
 249                 return -ENOMEM;
 250
 251         INIT_LIST_HEAD(&fpriv->contexts);
 252         filp->driver_priv = fpriv;
 253
 254         return 0;
 255 }
 256
 257 static void tegra_drm_context_free(struct tegra_drm_context *context)
 258 {
 259         context->client->ops->close_channel(context);
 260         kfree(context);
 261 }
 262
 263 static void tegra_drm_lastclose(struct drm_device *drm)
 264 {
 265 #ifdef CONFIG_DRM_FBDEV_EMULATION
 266         struct tegra_drm *tegra = drm->dev_private;
 267
 268         tegra_fbdev_restore_mode(tegra->fbdev);
 269 #endif
 270 }
 271
 272 static struct host1x_bo *
 273 host1x_bo_lookup(struct drm_file *file, u32 handle)
 274 {
 275         struct drm_gem_object *gem;
 276         struct tegra_bo *bo;
 277
 278         gem = drm_gem_object_lookup(file, handle);
 279         if (!gem)
 280                 return NULL;
 281
 282         drm_gem_object_unreference_unlocked(gem);
 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(file, cmdbuf);
 317         if (!dest->cmdbuf.bo)
 318                 return -ENOENT;
 319
 320         dest->target.bo = host1x_bo_lookup(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(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(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_unlocked(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(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_unlocked(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(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_unlocked(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(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_unlocked(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(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_unlocked(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         .compat_ioctl = drm_compat_ioctl,
 807         .llseek = noop_llseek,
 808 };
 809
 810 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm,
 811                                         unsigned int pipe)
 812 {
 813         struct drm_crtc *crtc = drm_crtc_from_index(drm, pipe);
 814         struct tegra_dc *dc = to_tegra_dc(crtc);
 815
 816         if (!crtc)
 817                 return 0;
 818
 819         return tegra_dc_get_vblank_counter(dc);
 820 }
 821
 822 static int tegra_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
 823 {
 824         struct drm_crtc *crtc = drm_crtc_from_index(drm, pipe);
 825         struct tegra_dc *dc = to_tegra_dc(crtc);
 826
 827         if (!crtc)
 828                 return -ENODEV;
 829
 830         tegra_dc_enable_vblank(dc);
 831
 832         return 0;
 833 }
 834
 835 static void tegra_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
 836 {
 837         struct drm_crtc *crtc = drm_crtc_from_index(drm, pipe);
 838         struct tegra_dc *dc = to_tegra_dc(crtc);
 839
 840         if (crtc)
 841                 tegra_dc_disable_vblank(dc);
 842 }
 843
 844 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
 845 {
 846         struct tegra_drm_file *fpriv = file->driver_priv;
 847         struct tegra_drm_context *context, *tmp;
 848
 849         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
 850                 tegra_drm_context_free(context);
 851
 852         kfree(fpriv);
 853 }
 854
 855 #ifdef CONFIG_DEBUG_FS
 856 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
 857 {
 858         struct drm_info_node *node = (struct drm_info_node *)s->private;
 859         struct drm_device *drm = node->minor->dev;
 860         struct drm_framebuffer *fb;
 861
 862         mutex_lock(&drm->mode_config.fb_lock);
 863
 864         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
 865                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
 866                            fb->base.id, fb->width, fb->height,
 867                            fb->format->depth,
 868                            fb->format->cpp[0] * 8,
 869                            drm_framebuffer_read_refcount(fb));
 870         }
 871
 872         mutex_unlock(&drm->mode_config.fb_lock);
 873
 874         return 0;
 875 }
 876
 877 static int tegra_debugfs_iova(struct seq_file *s, void *data)
 878 {
 879         struct drm_info_node *node = (struct drm_info_node *)s->private;
 880         struct drm_device *drm = node->minor->dev;
 881         struct tegra_drm *tegra = drm->dev_private;
 882         struct drm_printer p = drm_seq_file_printer(s);
 883
 884         mutex_lock(&tegra->mm_lock);
 885         drm_mm_print(&tegra->mm, &p);
 886         mutex_unlock(&tegra->mm_lock);
 887
 888         return 0;
 889 }
 890
 891 static struct drm_info_list tegra_debugfs_list[] = {
 892         { "framebuffers", tegra_debugfs_framebuffers, 0 },
 893         { "iova", tegra_debugfs_iova, 0 },
 894 };
 895
 896 static int tegra_debugfs_init(struct drm_minor *minor)
 897 {
 898         return drm_debugfs_create_files(tegra_debugfs_list,
 899                                         ARRAY_SIZE(tegra_debugfs_list),
 900                                         minor->debugfs_root, minor);
 901 }
 902 #endif
 903
 904 static struct drm_driver tegra_drm_driver = {
 905         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
 906                            DRIVER_ATOMIC,
 907         .load = tegra_drm_load,
 908         .unload = tegra_drm_unload,
 909         .open = tegra_drm_open,
 910         .preclose = tegra_drm_preclose,
 911         .lastclose = tegra_drm_lastclose,
 912
 913         .get_vblank_counter = tegra_drm_get_vblank_counter,
 914         .enable_vblank = tegra_drm_enable_vblank,
 915         .disable_vblank = tegra_drm_disable_vblank,
 916
 917 #if defined(CONFIG_DEBUG_FS)
 918         .debugfs_init = tegra_debugfs_init,
 919 #endif
 920
 921         .gem_free_object_unlocked = tegra_bo_free_object,
 922         .gem_vm_ops = &tegra_bo_vm_ops,
 923
 924         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 925         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 926         .gem_prime_export = tegra_gem_prime_export,
 927         .gem_prime_import = tegra_gem_prime_import,
 928
 929         .dumb_create = tegra_bo_dumb_create,
 930         .dumb_map_offset = tegra_bo_dumb_map_offset,
 931         .dumb_destroy = drm_gem_dumb_destroy,
 932
 933         .ioctls = tegra_drm_ioctls,
 934         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
 935         .fops = &tegra_drm_fops,
 936
 937         .name = DRIVER_NAME,
 938         .desc = DRIVER_DESC,
 939         .date = DRIVER_DATE,
 940         .major = DRIVER_MAJOR,
 941         .minor = DRIVER_MINOR,
 942         .patchlevel = DRIVER_PATCHLEVEL,
 943 };
 944
 945 int tegra_drm_register_client(struct tegra_drm *tegra,
 946                               struct tegra_drm_client *client)
 947 {
 948         mutex_lock(&tegra->clients_lock);
 949         list_add_tail(&client->list, &tegra->clients);
 950         mutex_unlock(&tegra->clients_lock);
 951
 952         return 0;
 953 }
 954
 955 int tegra_drm_unregister_client(struct tegra_drm *tegra,
 956                                 struct tegra_drm_client *client)
 957 {
 958         mutex_lock(&tegra->clients_lock);
 959         list_del_init(&client->list);
 960         mutex_unlock(&tegra->clients_lock);
 961
 962         return 0;
 963 }
 964
 965 static int host1x_drm_probe(struct host1x_device *dev)
 966 {
 967         struct drm_driver *driver = &tegra_drm_driver;
 968         struct drm_device *drm;
 969         int err;
 970
 971         drm = drm_dev_alloc(driver, &dev->dev);
 972         if (IS_ERR(drm))
 973                 return PTR_ERR(drm);
 974
 975         dev_set_drvdata(&dev->dev, drm);
 976
 977         err = drm_dev_register(drm, 0);
 978         if (err < 0)
 979                 goto unref;
 980
 981         return 0;
 982
 983 unref:
 984         drm_dev_unref(drm);
 985         return err;
 986 }
 987
 988 static int host1x_drm_remove(struct host1x_device *dev)
 989 {
 990         struct drm_device *drm = dev_get_drvdata(&dev->dev);
 991
 992         drm_dev_unregister(drm);
 993         drm_dev_unref(drm);
 994
 995         return 0;
 996 }
 997
 998 #ifdef CONFIG_PM_SLEEP
 999 static int host1x_drm_suspend(struct device *dev)
1000 {
1001         struct drm_device *drm = dev_get_drvdata(dev);
1002         struct tegra_drm *tegra = drm->dev_private;
1003
1004         drm_kms_helper_poll_disable(drm);
1005         tegra_drm_fb_suspend(drm);
1006
1007         tegra->state = drm_atomic_helper_suspend(drm);
1008         if (IS_ERR(tegra->state)) {
1009                 tegra_drm_fb_resume(drm);
1010                 drm_kms_helper_poll_enable(drm);
1011                 return PTR_ERR(tegra->state);
1012         }
1013
1014         return 0;
1015 }
1016
1017 static int host1x_drm_resume(struct device *dev)
1018 {
1019         struct drm_device *drm = dev_get_drvdata(dev);
1020         struct tegra_drm *tegra = drm->dev_private;
1021
1022         drm_atomic_helper_resume(drm, tegra->state);
1023         tegra_drm_fb_resume(drm);
1024         drm_kms_helper_poll_enable(drm);
1025
1026         return 0;
1027 }
1028 #endif
1029
1030 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1031                          host1x_drm_resume);
1032
1033 static const struct of_device_id host1x_drm_subdevs[] = {
1034         { .compatible = "nvidia,tegra20-dc", },
1035         { .compatible = "nvidia,tegra20-hdmi", },
1036         { .compatible = "nvidia,tegra20-gr2d", },
1037         { .compatible = "nvidia,tegra20-gr3d", },
1038         { .compatible = "nvidia,tegra30-dc", },
1039         { .compatible = "nvidia,tegra30-hdmi", },
1040         { .compatible = "nvidia,tegra30-gr2d", },
1041         { .compatible = "nvidia,tegra30-gr3d", },
1042         { .compatible = "nvidia,tegra114-dsi", },
1043         { .compatible = "nvidia,tegra114-hdmi", },
1044         { .compatible = "nvidia,tegra114-gr3d", },
1045         { .compatible = "nvidia,tegra124-dc", },
1046         { .compatible = "nvidia,tegra124-sor", },
1047         { .compatible = "nvidia,tegra124-hdmi", },
1048         { .compatible = "nvidia,tegra124-dsi", },
1049         { .compatible = "nvidia,tegra132-dsi", },
1050         { .compatible = "nvidia,tegra210-dc", },
1051         { .compatible = "nvidia,tegra210-dsi", },
1052         { .compatible = "nvidia,tegra210-sor", },
1053         { .compatible = "nvidia,tegra210-sor1", },
1054         { /* sentinel */ }
1055 };
1056
1057 static struct host1x_driver host1x_drm_driver = {
1058         .driver = {
1059                 .name = "drm",
1060                 .pm = &host1x_drm_pm_ops,
1061         },
1062         .probe = host1x_drm_probe,
1063         .remove = host1x_drm_remove,
1064         .subdevs = host1x_drm_subdevs,
1065 };
1066
1067 static struct platform_driver * const drivers[] = {
1068         &tegra_dc_driver,
1069         &tegra_hdmi_driver,
1070         &tegra_dsi_driver,
1071         &tegra_dpaux_driver,
1072         &tegra_sor_driver,
1073         &tegra_gr2d_driver,
1074         &tegra_gr3d_driver,
1075 };
1076
1077 static int __init host1x_drm_init(void)
1078 {
1079         int err;
1080
1081         err = host1x_driver_register(&host1x_drm_driver);
1082         if (err < 0)
1083                 return err;
1084
1085         err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1086         if (err < 0)
1087                 goto unregister_host1x;
1088
1089         return 0;
1090
1091 unregister_host1x:
1092         host1x_driver_unregister(&host1x_drm_driver);
1093         return err;
1094 }
1095 module_init(host1x_drm_init);
1096
1097 static void __exit host1x_drm_exit(void)
1098 {
1099         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1100         host1x_driver_unregister(&host1x_drm_driver);
1101 }
1102 module_exit(host1x_drm_exit);
1103
1104 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1105 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1106 MODULE_LICENSE("GPL v2");