linux/drivers/gpu/drm/tegra/drm.c
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   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
  26struct tegra_drm_file {
  27        struct list_head contexts;
  28};
  29
  30static 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
  37static void tegra_atomic_complete(struct tegra_drm *tegra,
  38                                  struct drm_atomic_state *state)
  39{
  40        struct drm_device *drm = tegra->drm;
  41
  42        /*
  43         * Everything below can be run asynchronously without the need to grab
  44         * any modeset locks at all under one condition: It must be guaranteed
  45         * that the asynchronous work has either been cancelled (if the driver
  46         * supports it, which at least requires that the framebuffers get
  47         * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
  48         * before the new state gets committed on the software side with
  49         * drm_atomic_helper_swap_state().
  50         *
  51         * This scheme allows new atomic state updates to be prepared and
  52         * checked in parallel to the asynchronous completion of the previous
  53         * update. Which is important since compositors need to figure out the
  54         * composition of the next frame right after having submitted the
  55         * current layout.
  56         */
  57
  58        drm_atomic_helper_commit_modeset_disables(drm, state);
  59        drm_atomic_helper_commit_planes(drm, state);
  60        drm_atomic_helper_commit_modeset_enables(drm, state);
  61
  62        drm_atomic_helper_wait_for_vblanks(drm, state);
  63
  64        drm_atomic_helper_cleanup_planes(drm, state);
  65        drm_atomic_state_free(state);
  66}
  67
  68static 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
  76static 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
 107static 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
 116static 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
 197vblank:
 198        drm_vblank_cleanup(drm);
 199device:
 200        host1x_device_exit(device);
 201fbdev:
 202        drm_kms_helper_poll_fini(drm);
 203        tegra_drm_fb_free(drm);
 204config:
 205        drm_mode_config_cleanup(drm);
 206
 207        if (tegra->domain) {
 208                iommu_domain_free(tegra->domain);
 209                drm_mm_takedown(&tegra->mm);
 210        }
 211free:
 212        kfree(tegra);
 213        return err;
 214}
 215
 216static 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
 241static 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
 255static void tegra_drm_context_free(struct tegra_drm_context *context)
 256{
 257        context->client->ops->close_channel(context);
 258        kfree(context);
 259}
 260
 261static 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
 270static struct host1x_bo *
 271host1x_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
 288static 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
 327int 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
 421fail_submit:
 422        host1x_job_unpin(job);
 423fail:
 424        host1x_job_put(job);
 425        return err;
 426}
 427
 428
 429#ifdef CONFIG_DRM_TEGRA_STAGING
 430static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
 431{
 432        return (struct tegra_drm_context *)(uintptr_t)context;
 433}
 434
 435static 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
 447static 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
 461static 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
 481static 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
 496static 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
 510static 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
 525static 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
 555static 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
 573static 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
 595static 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
 610static 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
 638static 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
 691static 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
 731static 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
 756static 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
 779static 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, DRM_UNLOCKED),
 782        DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
 783        DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
 784        DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
 785        DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
 786        DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
 787        DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
 788        DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
 789        DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
 790        DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, DRM_UNLOCKED),
 791        DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, DRM_UNLOCKED),
 792        DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, DRM_UNLOCKED),
 793        DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, DRM_UNLOCKED),
 794        DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, DRM_UNLOCKED),
 795#endif
 796};
 797
 798static 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
 812static 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
 825static u32 tegra_drm_get_vblank_counter(struct drm_device *drm, int pipe)
 826{
 827        struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 828        struct tegra_dc *dc = to_tegra_dc(crtc);
 829
 830        if (!crtc)
 831                return 0;
 832
 833        return tegra_dc_get_vblank_counter(dc);
 834}
 835
 836static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
 837{
 838        struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 839        struct tegra_dc *dc = to_tegra_dc(crtc);
 840
 841        if (!crtc)
 842                return -ENODEV;
 843
 844        tegra_dc_enable_vblank(dc);
 845
 846        return 0;
 847}
 848
 849static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
 850{
 851        struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 852        struct tegra_dc *dc = to_tegra_dc(crtc);
 853
 854        if (crtc)
 855                tegra_dc_disable_vblank(dc);
 856}
 857
 858static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
 859{
 860        struct tegra_drm_file *fpriv = file->driver_priv;
 861        struct tegra_drm_context *context, *tmp;
 862        struct drm_crtc *crtc;
 863
 864        list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 865                tegra_dc_cancel_page_flip(crtc, file);
 866
 867        list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
 868                tegra_drm_context_free(context);
 869
 870        kfree(fpriv);
 871}
 872
 873#ifdef CONFIG_DEBUG_FS
 874static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
 875{
 876        struct drm_info_node *node = (struct drm_info_node *)s->private;
 877        struct drm_device *drm = node->minor->dev;
 878        struct drm_framebuffer *fb;
 879
 880        mutex_lock(&drm->mode_config.fb_lock);
 881
 882        list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
 883                seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
 884                           fb->base.id, fb->width, fb->height, fb->depth,
 885                           fb->bits_per_pixel,
 886                           atomic_read(&fb->refcount.refcount));
 887        }
 888
 889        mutex_unlock(&drm->mode_config.fb_lock);
 890
 891        return 0;
 892}
 893
 894static int tegra_debugfs_iova(struct seq_file *s, void *data)
 895{
 896        struct drm_info_node *node = (struct drm_info_node *)s->private;
 897        struct drm_device *drm = node->minor->dev;
 898        struct tegra_drm *tegra = drm->dev_private;
 899
 900        return drm_mm_dump_table(s, &tegra->mm);
 901}
 902
 903static struct drm_info_list tegra_debugfs_list[] = {
 904        { "framebuffers", tegra_debugfs_framebuffers, 0 },
 905        { "iova", tegra_debugfs_iova, 0 },
 906};
 907
 908static int tegra_debugfs_init(struct drm_minor *minor)
 909{
 910        return drm_debugfs_create_files(tegra_debugfs_list,
 911                                        ARRAY_SIZE(tegra_debugfs_list),
 912                                        minor->debugfs_root, minor);
 913}
 914
 915static void tegra_debugfs_cleanup(struct drm_minor *minor)
 916{
 917        drm_debugfs_remove_files(tegra_debugfs_list,
 918                                 ARRAY_SIZE(tegra_debugfs_list), minor);
 919}
 920#endif
 921
 922static struct drm_driver tegra_drm_driver = {
 923        .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 924        .load = tegra_drm_load,
 925        .unload = tegra_drm_unload,
 926        .open = tegra_drm_open,
 927        .preclose = tegra_drm_preclose,
 928        .lastclose = tegra_drm_lastclose,
 929
 930        .get_vblank_counter = tegra_drm_get_vblank_counter,
 931        .enable_vblank = tegra_drm_enable_vblank,
 932        .disable_vblank = tegra_drm_disable_vblank,
 933
 934#if defined(CONFIG_DEBUG_FS)
 935        .debugfs_init = tegra_debugfs_init,
 936        .debugfs_cleanup = tegra_debugfs_cleanup,
 937#endif
 938
 939        .gem_free_object = tegra_bo_free_object,
 940        .gem_vm_ops = &tegra_bo_vm_ops,
 941
 942        .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 943        .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 944        .gem_prime_export = tegra_gem_prime_export,
 945        .gem_prime_import = tegra_gem_prime_import,
 946
 947        .dumb_create = tegra_bo_dumb_create,
 948        .dumb_map_offset = tegra_bo_dumb_map_offset,
 949        .dumb_destroy = drm_gem_dumb_destroy,
 950
 951        .ioctls = tegra_drm_ioctls,
 952        .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
 953        .fops = &tegra_drm_fops,
 954
 955        .name = DRIVER_NAME,
 956        .desc = DRIVER_DESC,
 957        .date = DRIVER_DATE,
 958        .major = DRIVER_MAJOR,
 959        .minor = DRIVER_MINOR,
 960        .patchlevel = DRIVER_PATCHLEVEL,
 961};
 962
 963int tegra_drm_register_client(struct tegra_drm *tegra,
 964                              struct tegra_drm_client *client)
 965{
 966        mutex_lock(&tegra->clients_lock);
 967        list_add_tail(&client->list, &tegra->clients);
 968        mutex_unlock(&tegra->clients_lock);
 969
 970        return 0;
 971}
 972
 973int tegra_drm_unregister_client(struct tegra_drm *tegra,
 974                                struct tegra_drm_client *client)
 975{
 976        mutex_lock(&tegra->clients_lock);
 977        list_del_init(&client->list);
 978        mutex_unlock(&tegra->clients_lock);
 979
 980        return 0;
 981}
 982
 983static int host1x_drm_probe(struct host1x_device *dev)
 984{
 985        struct drm_driver *driver = &tegra_drm_driver;
 986        struct drm_device *drm;
 987        int err;
 988
 989        drm = drm_dev_alloc(driver, &dev->dev);
 990        if (!drm)
 991                return -ENOMEM;
 992
 993        drm_dev_set_unique(drm, dev_name(&dev->dev));
 994        dev_set_drvdata(&dev->dev, drm);
 995
 996        err = drm_dev_register(drm, 0);
 997        if (err < 0)
 998                goto unref;
 999
1000        DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
1001                 driver->major, driver->minor, driver->patchlevel,
1002                 driver->date, drm->primary->index);
1003
1004        return 0;
1005
1006unref:
1007        drm_dev_unref(drm);
1008        return err;
1009}
1010
1011static int host1x_drm_remove(struct host1x_device *dev)
1012{
1013        struct drm_device *drm = dev_get_drvdata(&dev->dev);
1014
1015        drm_dev_unregister(drm);
1016        drm_dev_unref(drm);
1017
1018        return 0;
1019}
1020
1021#ifdef CONFIG_PM_SLEEP
1022static int host1x_drm_suspend(struct device *dev)
1023{
1024        struct drm_device *drm = dev_get_drvdata(dev);
1025
1026        drm_kms_helper_poll_disable(drm);
1027
1028        return 0;
1029}
1030
1031static int host1x_drm_resume(struct device *dev)
1032{
1033        struct drm_device *drm = dev_get_drvdata(dev);
1034
1035        drm_kms_helper_poll_enable(drm);
1036
1037        return 0;
1038}
1039#endif
1040
1041static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1042                         host1x_drm_resume);
1043
1044static const struct of_device_id host1x_drm_subdevs[] = {
1045        { .compatible = "nvidia,tegra20-dc", },
1046        { .compatible = "nvidia,tegra20-hdmi", },
1047        { .compatible = "nvidia,tegra20-gr2d", },
1048        { .compatible = "nvidia,tegra20-gr3d", },
1049        { .compatible = "nvidia,tegra30-dc", },
1050        { .compatible = "nvidia,tegra30-hdmi", },
1051        { .compatible = "nvidia,tegra30-gr2d", },
1052        { .compatible = "nvidia,tegra30-gr3d", },
1053        { .compatible = "nvidia,tegra114-dsi", },
1054        { .compatible = "nvidia,tegra114-hdmi", },
1055        { .compatible = "nvidia,tegra114-gr3d", },
1056        { .compatible = "nvidia,tegra124-dc", },
1057        { .compatible = "nvidia,tegra124-sor", },
1058        { .compatible = "nvidia,tegra124-hdmi", },
1059        { .compatible = "nvidia,tegra124-dsi", },
1060        { .compatible = "nvidia,tegra132-dsi", },
1061        { .compatible = "nvidia,tegra210-dc", },
1062        { .compatible = "nvidia,tegra210-dsi", },
1063        { .compatible = "nvidia,tegra210-sor", },
1064        { .compatible = "nvidia,tegra210-sor1", },
1065        { /* sentinel */ }
1066};
1067
1068static struct host1x_driver host1x_drm_driver = {
1069        .driver = {
1070                .name = "drm",
1071                .pm = &host1x_drm_pm_ops,
1072        },
1073        .probe = host1x_drm_probe,
1074        .remove = host1x_drm_remove,
1075        .subdevs = host1x_drm_subdevs,
1076};
1077
1078static int __init host1x_drm_init(void)
1079{
1080        int err;
1081
1082        err = host1x_driver_register(&host1x_drm_driver);
1083        if (err < 0)
1084                return err;
1085
1086        err = platform_driver_register(&tegra_dc_driver);
1087        if (err < 0)
1088                goto unregister_host1x;
1089
1090        err = platform_driver_register(&tegra_dsi_driver);
1091        if (err < 0)
1092                goto unregister_dc;
1093
1094        err = platform_driver_register(&tegra_sor_driver);
1095        if (err < 0)
1096                goto unregister_dsi;
1097
1098        err = platform_driver_register(&tegra_hdmi_driver);
1099        if (err < 0)
1100                goto unregister_sor;
1101
1102        err = platform_driver_register(&tegra_dpaux_driver);
1103        if (err < 0)
1104                goto unregister_hdmi;
1105
1106        err = platform_driver_register(&tegra_gr2d_driver);
1107        if (err < 0)
1108                goto unregister_dpaux;
1109
1110        err = platform_driver_register(&tegra_gr3d_driver);
1111        if (err < 0)
1112                goto unregister_gr2d;
1113
1114        return 0;
1115
1116unregister_gr2d:
1117        platform_driver_unregister(&tegra_gr2d_driver);
1118unregister_dpaux:
1119        platform_driver_unregister(&tegra_dpaux_driver);
1120unregister_hdmi:
1121        platform_driver_unregister(&tegra_hdmi_driver);
1122unregister_sor:
1123        platform_driver_unregister(&tegra_sor_driver);
1124unregister_dsi:
1125        platform_driver_unregister(&tegra_dsi_driver);
1126unregister_dc:
1127        platform_driver_unregister(&tegra_dc_driver);
1128unregister_host1x:
1129        host1x_driver_unregister(&host1x_drm_driver);
1130        return err;
1131}
1132module_init(host1x_drm_init);
1133
1134static void __exit host1x_drm_exit(void)
1135{
1136        platform_driver_unregister(&tegra_gr3d_driver);
1137        platform_driver_unregister(&tegra_gr2d_driver);
1138        platform_driver_unregister(&tegra_dpaux_driver);
1139        platform_driver_unregister(&tegra_hdmi_driver);
1140        platform_driver_unregister(&tegra_sor_driver);
1141        platform_driver_unregister(&tegra_dsi_driver);
1142        platform_driver_unregister(&tegra_dc_driver);
1143        host1x_driver_unregister(&host1x_drm_driver);
1144}
1145module_exit(host1x_drm_exit);
1146
1147MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1148MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1149MODULE_LICENSE("GPL v2");
1150