drivers/gpu/drm/tegra/drm.c

   1 /*
   2  * Copyright (C) 2012 Avionic Design GmbH
   3  * Copyright (C) 2012-2016 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/bitops.h>
  11 #include <linux/host1x.h>
  12 #include <linux/idr.h>
  13 #include <linux/iommu.h>
  14
  15 #include <drm/drm_atomic.h>
  16 #include <drm/drm_atomic_helper.h>
  17
  18 #include "drm.h"
  19 #include "gem.h"
  20
  21 #define DRIVER_NAME "tegra"
  22 #define DRIVER_DESC "NVIDIA Tegra graphics"
  23 #define DRIVER_DATE "20120330"
  24 #define DRIVER_MAJOR 0
  25 #define DRIVER_MINOR 0
  26 #define DRIVER_PATCHLEVEL 0
  27
  28 #define CARVEOUT_SZ SZ_64M
  29
  30 struct tegra_drm_file {
  31         struct idr contexts;
  32         struct mutex lock;
  33 };
  34
  35 static void tegra_atomic_schedule(struct tegra_drm *tegra,
  36                                   struct drm_atomic_state *state)
  37 {
  38         tegra->commit.state = state;
  39         schedule_work(&tegra->commit.work);
  40 }
  41
  42 static void tegra_atomic_complete(struct tegra_drm *tegra,
  43                                   struct drm_atomic_state *state)
  44 {
  45         struct drm_device *drm = tegra->drm;
  46
  47         /*
  48          * Everything below can be run asynchronously without the need to grab
  49          * any modeset locks at all under one condition: It must be guaranteed
  50          * that the asynchronous work has either been cancelled (if the driver
  51          * supports it, which at least requires that the framebuffers get
  52          * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
  53          * before the new state gets committed on the software side with
  54          * drm_atomic_helper_swap_state().
  55          *
  56          * This scheme allows new atomic state updates to be prepared and
  57          * checked in parallel to the asynchronous completion of the previous
  58          * update. Which is important since compositors need to figure out the
  59          * composition of the next frame right after having submitted the
  60          * current layout.
  61          */
  62
  63         drm_atomic_helper_commit_modeset_disables(drm, state);
  64         drm_atomic_helper_commit_modeset_enables(drm, state);
  65         drm_atomic_helper_commit_planes(drm, state,
  66                                         DRM_PLANE_COMMIT_ACTIVE_ONLY);
  67
  68         drm_atomic_helper_wait_for_vblanks(drm, state);
  69
  70         drm_atomic_helper_cleanup_planes(drm, state);
  71         drm_atomic_state_put(state);
  72 }
  73
  74 static void tegra_atomic_work(struct work_struct *work)
  75 {
  76         struct tegra_drm *tegra = container_of(work, struct tegra_drm,
  77                                                commit.work);
  78
  79         tegra_atomic_complete(tegra, tegra->commit.state);
  80 }
  81
  82 static int tegra_atomic_commit(struct drm_device *drm,
  83                                struct drm_atomic_state *state, bool nonblock)
  84 {
  85         struct tegra_drm *tegra = drm->dev_private;
  86         int err;
  87
  88         err = drm_atomic_helper_prepare_planes(drm, state);
  89         if (err)
  90                 return err;
  91
  92         /* serialize outstanding nonblocking commits */
  93         mutex_lock(&tegra->commit.lock);
  94         flush_work(&tegra->commit.work);
  95
  96         /*
  97          * This is the point of no return - everything below never fails except
  98          * when the hw goes bonghits. Which means we can commit the new state on
  99          * the software side now.
 100          */
 101
 102         drm_atomic_helper_swap_state(state, true);
 103
 104         drm_atomic_state_get(state);
 105         if (nonblock)
 106                 tegra_atomic_schedule(tegra, state);
 107         else
 108                 tegra_atomic_complete(tegra, state);
 109
 110         mutex_unlock(&tegra->commit.lock);
 111         return 0;
 112 }
 113
 114 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
 115         .fb_create = tegra_fb_create,
 116 #ifdef CONFIG_DRM_FBDEV_EMULATION
 117         .output_poll_changed = tegra_fb_output_poll_changed,
 118 #endif
 119         .atomic_check = drm_atomic_helper_check,
 120         .atomic_commit = tegra_atomic_commit,
 121 };
 122
 123 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
 124 {
 125         struct host1x_device *device = to_host1x_device(drm->dev);
 126         struct tegra_drm *tegra;
 127         int err;
 128
 129         tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
 130         if (!tegra)
 131                 return -ENOMEM;
 132
 133         if (iommu_present(&platform_bus_type)) {
 134                 u64 carveout_start, carveout_end, gem_start, gem_end;
 135                 struct iommu_domain_geometry *geometry;
 136                 unsigned long order;
 137
 138                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
 139                 if (!tegra->domain) {
 140                         err = -ENOMEM;
 141                         goto free;
 142                 }
 143
 144                 geometry = &tegra->domain->geometry;
 145                 gem_start = geometry->aperture_start;
 146                 gem_end = geometry->aperture_end - CARVEOUT_SZ;
 147                 carveout_start = gem_end + 1;
 148                 carveout_end = geometry->aperture_end;
 149
 150                 order = __ffs(tegra->domain->pgsize_bitmap);
 151                 init_iova_domain(&tegra->carveout.domain, 1UL << order,
 152                                  carveout_start >> order,
 153                                  carveout_end >> order);
 154
 155                 tegra->carveout.shift = iova_shift(&tegra->carveout.domain);
 156                 tegra->carveout.limit = carveout_end >> tegra->carveout.shift;
 157
 158                 drm_mm_init(&tegra->mm, gem_start, gem_end - gem_start + 1);
 159                 mutex_init(&tegra->mm_lock);
 160
 161                 DRM_DEBUG("IOMMU apertures:\n");
 162                 DRM_DEBUG("  GEM: %#llx-%#llx\n", gem_start, gem_end);
 163                 DRM_DEBUG("  Carveout: %#llx-%#llx\n", carveout_start,
 164                           carveout_end);
 165         }
 166
 167         mutex_init(&tegra->clients_lock);
 168         INIT_LIST_HEAD(&tegra->clients);
 169
 170         mutex_init(&tegra->commit.lock);
 171         INIT_WORK(&tegra->commit.work, tegra_atomic_work);
 172
 173         drm->dev_private = tegra;
 174         tegra->drm = drm;
 175
 176         drm_mode_config_init(drm);
 177
 178         drm->mode_config.min_width = 0;
 179         drm->mode_config.min_height = 0;
 180
 181         drm->mode_config.max_width = 4096;
 182         drm->mode_config.max_height = 4096;
 183
 184         drm->mode_config.allow_fb_modifiers = true;
 185
 186         drm->mode_config.funcs = &tegra_drm_mode_funcs;
 187
 188         err = tegra_drm_fb_prepare(drm);
 189         if (err < 0)
 190                 goto config;
 191
 192         drm_kms_helper_poll_init(drm);
 193
 194         err = host1x_device_init(device);
 195         if (err < 0)
 196                 goto fbdev;
 197
 198         /*
 199          * We don't use the drm_irq_install() helpers provided by the DRM
 200          * core, so we need to set this manually in order to allow the
 201          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 202          */
 203         drm->irq_enabled = true;
 204
 205         /* syncpoints are used for full 32-bit hardware VBLANK counters */
 206         drm->max_vblank_count = 0xffffffff;
 207
 208         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
 209         if (err < 0)
 210                 goto device;
 211
 212         drm_mode_config_reset(drm);
 213
 214         err = tegra_drm_fb_init(drm);
 215         if (err < 0)
 216                 goto vblank;
 217
 218         return 0;
 219
 220 vblank:
 221         drm_vblank_cleanup(drm);
 222 device:
 223         host1x_device_exit(device);
 224 fbdev:
 225         drm_kms_helper_poll_fini(drm);
 226         tegra_drm_fb_free(drm);
 227 config:
 228         drm_mode_config_cleanup(drm);
 229
 230         if (tegra->domain) {
 231                 iommu_domain_free(tegra->domain);
 232                 drm_mm_takedown(&tegra->mm);
 233                 mutex_destroy(&tegra->mm_lock);
 234                 put_iova_domain(&tegra->carveout.domain);
 235         }
 236 free:
 237         kfree(tegra);
 238         return err;
 239 }
 240
 241 static void tegra_drm_unload(struct drm_device *drm)
 242 {
 243         struct host1x_device *device = to_host1x_device(drm->dev);
 244         struct tegra_drm *tegra = drm->dev_private;
 245         int err;
 246
 247         drm_kms_helper_poll_fini(drm);
 248         tegra_drm_fb_exit(drm);
 249         drm_mode_config_cleanup(drm);
 250         drm_vblank_cleanup(drm);
 251
 252         err = host1x_device_exit(device);
 253         if (err < 0)
 254                 return;
 255
 256         if (tegra->domain) {
 257                 iommu_domain_free(tegra->domain);
 258                 drm_mm_takedown(&tegra->mm);
 259                 mutex_destroy(&tegra->mm_lock);
 260                 put_iova_domain(&tegra->carveout.domain);
 261         }
 262
 263         kfree(tegra);
 264 }
 265
 266 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
 267 {
 268         struct tegra_drm_file *fpriv;
 269
 270         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
 271         if (!fpriv)
 272                 return -ENOMEM;
 273
 274         idr_init(&fpriv->contexts);
 275         mutex_init(&fpriv->lock);
 276         filp->driver_priv = fpriv;
 277
 278         return 0;
 279 }
 280
 281 static void tegra_drm_context_free(struct tegra_drm_context *context)
 282 {
 283         context->client->ops->close_channel(context);
 284         kfree(context);
 285 }
 286
 287 static void tegra_drm_lastclose(struct drm_device *drm)
 288 {
 289 #ifdef CONFIG_DRM_FBDEV_EMULATION
 290         struct tegra_drm *tegra = drm->dev_private;
 291
 292         tegra_fbdev_restore_mode(tegra->fbdev);
 293 #endif
 294 }
 295
 296 static struct host1x_bo *
 297 host1x_bo_lookup(struct drm_file *file, u32 handle)
 298 {
 299         struct drm_gem_object *gem;
 300         struct tegra_bo *bo;
 301
 302         gem = drm_gem_object_lookup(file, handle);
 303         if (!gem)
 304                 return NULL;
 305
 306         drm_gem_object_unreference_unlocked(gem);
 307
 308         bo = to_tegra_bo(gem);
 309         return &bo->base;
 310 }
 311
 312 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
 313                                        struct drm_tegra_reloc __user *src,
 314                                        struct drm_device *drm,
 315                                        struct drm_file *file)
 316 {
 317         u32 cmdbuf, target;
 318         int err;
 319
 320         err = get_user(cmdbuf, &src->cmdbuf.handle);
 321         if (err < 0)
 322                 return err;
 323
 324         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
 325         if (err < 0)
 326                 return err;
 327
 328         err = get_user(target, &src->target.handle);
 329         if (err < 0)
 330                 return err;
 331
 332         err = get_user(dest->target.offset, &src->target.offset);
 333         if (err < 0)
 334                 return err;
 335
 336         err = get_user(dest->shift, &src->shift);
 337         if (err < 0)
 338                 return err;
 339
 340         dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf);
 341         if (!dest->cmdbuf.bo)
 342                 return -ENOENT;
 343
 344         dest->target.bo = host1x_bo_lookup(file, target);
 345         if (!dest->target.bo)
 346                 return -ENOENT;
 347
 348         return 0;
 349 }
 350
 351 int tegra_drm_submit(struct tegra_drm_context *context,
 352                      struct drm_tegra_submit *args, struct drm_device *drm,
 353                      struct drm_file *file)
 354 {
 355         unsigned int num_cmdbufs = args->num_cmdbufs;
 356         unsigned int num_relocs = args->num_relocs;
 357         unsigned int num_waitchks = args->num_waitchks;
 358         struct drm_tegra_cmdbuf __user *cmdbufs =
 359                 (void __user *)(uintptr_t)args->cmdbufs;
 360         struct drm_tegra_reloc __user *relocs =
 361                 (void __user *)(uintptr_t)args->relocs;
 362         struct drm_tegra_waitchk __user *waitchks =
 363                 (void __user *)(uintptr_t)args->waitchks;
 364         struct drm_tegra_syncpt syncpt;
 365         struct host1x_job *job;
 366         int err;
 367
 368         /* We don't yet support other than one syncpt_incr struct per submit */
 369         if (args->num_syncpts != 1)
 370                 return -EINVAL;
 371
 372         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
 373                                args->num_relocs, args->num_waitchks);
 374         if (!job)
 375                 return -ENOMEM;
 376
 377         job->num_relocs = args->num_relocs;
 378         job->num_waitchk = args->num_waitchks;
 379         job->client = (u32)args->context;
 380         job->class = context->client->base.class;
 381         job->serialize = true;
 382
 383         while (num_cmdbufs) {
 384                 struct drm_tegra_cmdbuf cmdbuf;
 385                 struct host1x_bo *bo;
 386
 387                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
 388                         err = -EFAULT;
 389                         goto fail;
 390                 }
 391
 392                 bo = host1x_bo_lookup(file, cmdbuf.handle);
 393                 if (!bo) {
 394                         err = -ENOENT;
 395                         goto fail;
 396                 }
 397
 398                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
 399                 num_cmdbufs--;
 400                 cmdbufs++;
 401         }
 402
 403         /* copy and resolve relocations from submit */
 404         while (num_relocs--) {
 405                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
 406                                                   &relocs[num_relocs], drm,
 407                                                   file);
 408                 if (err < 0)
 409                         goto fail;
 410         }
 411
 412         if (copy_from_user(job->waitchk, waitchks,
 413                            sizeof(*waitchks) * num_waitchks)) {
 414                 err = -EFAULT;
 415                 goto fail;
 416         }
 417
 418         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
 419                            sizeof(syncpt))) {
 420                 err = -EFAULT;
 421                 goto fail;
 422         }
 423
 424         job->is_addr_reg = context->client->ops->is_addr_reg;
 425         job->syncpt_incrs = syncpt.incrs;
 426         job->syncpt_id = syncpt.id;
 427         job->timeout = 10000;
 428
 429         if (args->timeout && args->timeout < 10000)
 430                 job->timeout = args->timeout;
 431
 432         err = host1x_job_pin(job, context->client->base.dev);
 433         if (err)
 434                 goto fail;
 435
 436         err = host1x_job_submit(job);
 437         if (err)
 438                 goto fail_submit;
 439
 440         args->fence = job->syncpt_end;
 441
 442         host1x_job_put(job);
 443         return 0;
 444
 445 fail_submit:
 446         host1x_job_unpin(job);
 447 fail:
 448         host1x_job_put(job);
 449         return err;
 450 }
 451
 452
 453 #ifdef CONFIG_DRM_TEGRA_STAGING
 454 static int tegra_gem_create(struct drm_device *drm, void *data,
 455                             struct drm_file *file)
 456 {
 457         struct drm_tegra_gem_create *args = data;
 458         struct tegra_bo *bo;
 459
 460         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
 461                                          &args->handle);
 462         if (IS_ERR(bo))
 463                 return PTR_ERR(bo);
 464
 465         return 0;
 466 }
 467
 468 static int tegra_gem_mmap(struct drm_device *drm, void *data,
 469                           struct drm_file *file)
 470 {
 471         struct drm_tegra_gem_mmap *args = data;
 472         struct drm_gem_object *gem;
 473         struct tegra_bo *bo;
 474
 475         gem = drm_gem_object_lookup(file, args->handle);
 476         if (!gem)
 477                 return -EINVAL;
 478
 479         bo = to_tegra_bo(gem);
 480
 481         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
 482
 483         drm_gem_object_unreference_unlocked(gem);
 484
 485         return 0;
 486 }
 487
 488 static int tegra_syncpt_read(struct drm_device *drm, void *data,
 489                              struct drm_file *file)
 490 {
 491         struct host1x *host = dev_get_drvdata(drm->dev->parent);
 492         struct drm_tegra_syncpt_read *args = data;
 493         struct host1x_syncpt *sp;
 494
 495         sp = host1x_syncpt_get(host, args->id);
 496         if (!sp)
 497                 return -EINVAL;
 498
 499         args->value = host1x_syncpt_read_min(sp);
 500         return 0;
 501 }
 502
 503 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
 504                              struct drm_file *file)
 505 {
 506         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 507         struct drm_tegra_syncpt_incr *args = data;
 508         struct host1x_syncpt *sp;
 509
 510         sp = host1x_syncpt_get(host1x, args->id);
 511         if (!sp)
 512                 return -EINVAL;
 513
 514         return host1x_syncpt_incr(sp);
 515 }
 516
 517 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
 518                              struct drm_file *file)
 519 {
 520         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 521         struct drm_tegra_syncpt_wait *args = data;
 522         struct host1x_syncpt *sp;
 523
 524         sp = host1x_syncpt_get(host1x, args->id);
 525         if (!sp)
 526                 return -EINVAL;
 527
 528         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
 529                                   &args->value);
 530 }
 531
 532 static int tegra_client_open(struct tegra_drm_file *fpriv,
 533                              struct tegra_drm_client *client,
 534                              struct tegra_drm_context *context)
 535 {
 536         int err;
 537
 538         err = client->ops->open_channel(client, context);
 539         if (err < 0)
 540                 return err;
 541
 542         err = idr_alloc(&fpriv->contexts, context, 0, 0, GFP_KERNEL);
 543         if (err < 0) {
 544                 client->ops->close_channel(context);
 545                 return err;
 546         }
 547
 548         context->client = client;
 549         context->id = err;
 550
 551         return 0;
 552 }
 553
 554 static int tegra_open_channel(struct drm_device *drm, void *data,
 555                               struct drm_file *file)
 556 {
 557         struct tegra_drm_file *fpriv = file->driver_priv;
 558         struct tegra_drm *tegra = drm->dev_private;
 559         struct drm_tegra_open_channel *args = data;
 560         struct tegra_drm_context *context;
 561         struct tegra_drm_client *client;
 562         int err = -ENODEV;
 563
 564         context = kzalloc(sizeof(*context), GFP_KERNEL);
 565         if (!context)
 566                 return -ENOMEM;
 567
 568         mutex_lock(&fpriv->lock);
 569
 570         list_for_each_entry(client, &tegra->clients, list)
 571                 if (client->base.class == args->client) {
 572                         err = tegra_client_open(fpriv, client, context);
 573                         if (err < 0)
 574                                 break;
 575
 576                         args->context = context->id;
 577                         break;
 578                 }
 579
 580         if (err < 0)
 581                 kfree(context);
 582
 583         mutex_unlock(&fpriv->lock);
 584         return err;
 585 }
 586
 587 static int tegra_close_channel(struct drm_device *drm, void *data,
 588                                struct drm_file *file)
 589 {
 590         struct tegra_drm_file *fpriv = file->driver_priv;
 591         struct drm_tegra_close_channel *args = data;
 592         struct tegra_drm_context *context;
 593         int err = 0;
 594
 595         mutex_lock(&fpriv->lock);
 596
 597         context = idr_find(&fpriv->contexts, args->context);
 598         if (!context) {
 599                 err = -EINVAL;
 600                 goto unlock;
 601         }
 602
 603         idr_remove(&fpriv->contexts, context->id);
 604         tegra_drm_context_free(context);
 605
 606 unlock:
 607         mutex_unlock(&fpriv->lock);
 608         return err;
 609 }
 610
 611 static int tegra_get_syncpt(struct drm_device *drm, void *data,
 612                             struct drm_file *file)
 613 {
 614         struct tegra_drm_file *fpriv = file->driver_priv;
 615         struct drm_tegra_get_syncpt *args = data;
 616         struct tegra_drm_context *context;
 617         struct host1x_syncpt *syncpt;
 618         int err = 0;
 619
 620         mutex_lock(&fpriv->lock);
 621
 622         context = idr_find(&fpriv->contexts, args->context);
 623         if (!context) {
 624                 err = -ENODEV;
 625                 goto unlock;
 626         }
 627
 628         if (args->index >= context->client->base.num_syncpts) {
 629                 err = -EINVAL;
 630                 goto unlock;
 631         }
 632
 633         syncpt = context->client->base.syncpts[args->index];
 634         args->id = host1x_syncpt_id(syncpt);
 635
 636 unlock:
 637         mutex_unlock(&fpriv->lock);
 638         return err;
 639 }
 640
 641 static int tegra_submit(struct drm_device *drm, void *data,
 642                         struct drm_file *file)
 643 {
 644         struct tegra_drm_file *fpriv = file->driver_priv;
 645         struct drm_tegra_submit *args = data;
 646         struct tegra_drm_context *context;
 647         int err;
 648
 649         mutex_lock(&fpriv->lock);
 650
 651         context = idr_find(&fpriv->contexts, args->context);
 652         if (!context) {
 653                 err = -ENODEV;
 654                 goto unlock;
 655         }
 656
 657         err = context->client->ops->submit(context, args, drm, file);
 658
 659 unlock:
 660         mutex_unlock(&fpriv->lock);
 661         return err;
 662 }
 663
 664 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
 665                                  struct drm_file *file)
 666 {
 667         struct tegra_drm_file *fpriv = file->driver_priv;
 668         struct drm_tegra_get_syncpt_base *args = data;
 669         struct tegra_drm_context *context;
 670         struct host1x_syncpt_base *base;
 671         struct host1x_syncpt *syncpt;
 672         int err = 0;
 673
 674         mutex_lock(&fpriv->lock);
 675
 676         context = idr_find(&fpriv->contexts, args->context);
 677         if (!context) {
 678                 err = -ENODEV;
 679                 goto unlock;
 680         }
 681
 682         if (args->syncpt >= context->client->base.num_syncpts) {
 683                 err = -EINVAL;
 684                 goto unlock;
 685         }
 686
 687         syncpt = context->client->base.syncpts[args->syncpt];
 688
 689         base = host1x_syncpt_get_base(syncpt);
 690         if (!base) {
 691                 err = -ENXIO;
 692                 goto unlock;
 693         }
 694
 695         args->id = host1x_syncpt_base_id(base);
 696
 697 unlock:
 698         mutex_unlock(&fpriv->lock);
 699         return err;
 700 }
 701
 702 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
 703                                 struct drm_file *file)
 704 {
 705         struct drm_tegra_gem_set_tiling *args = data;
 706         enum tegra_bo_tiling_mode mode;
 707         struct drm_gem_object *gem;
 708         unsigned long value = 0;
 709         struct tegra_bo *bo;
 710
 711         switch (args->mode) {
 712         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
 713                 mode = TEGRA_BO_TILING_MODE_PITCH;
 714
 715                 if (args->value != 0)
 716                         return -EINVAL;
 717
 718                 break;
 719
 720         case DRM_TEGRA_GEM_TILING_MODE_TILED:
 721                 mode = TEGRA_BO_TILING_MODE_TILED;
 722
 723                 if (args->value != 0)
 724                         return -EINVAL;
 725
 726                 break;
 727
 728         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
 729                 mode = TEGRA_BO_TILING_MODE_BLOCK;
 730
 731                 if (args->value > 5)
 732                         return -EINVAL;
 733
 734                 value = args->value;
 735                 break;
 736
 737         default:
 738                 return -EINVAL;
 739         }
 740
 741         gem = drm_gem_object_lookup(file, args->handle);
 742         if (!gem)
 743                 return -ENOENT;
 744
 745         bo = to_tegra_bo(gem);
 746
 747         bo->tiling.mode = mode;
 748         bo->tiling.value = value;
 749
 750         drm_gem_object_unreference_unlocked(gem);
 751
 752         return 0;
 753 }
 754
 755 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
 756                                 struct drm_file *file)
 757 {
 758         struct drm_tegra_gem_get_tiling *args = data;
 759         struct drm_gem_object *gem;
 760         struct tegra_bo *bo;
 761         int err = 0;
 762
 763         gem = drm_gem_object_lookup(file, args->handle);
 764         if (!gem)
 765                 return -ENOENT;
 766
 767         bo = to_tegra_bo(gem);
 768
 769         switch (bo->tiling.mode) {
 770         case TEGRA_BO_TILING_MODE_PITCH:
 771                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
 772                 args->value = 0;
 773                 break;
 774
 775         case TEGRA_BO_TILING_MODE_TILED:
 776                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
 777                 args->value = 0;
 778                 break;
 779
 780         case TEGRA_BO_TILING_MODE_BLOCK:
 781                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
 782                 args->value = bo->tiling.value;
 783                 break;
 784
 785         default:
 786                 err = -EINVAL;
 787                 break;
 788         }
 789
 790         drm_gem_object_unreference_unlocked(gem);
 791
 792         return err;
 793 }
 794
 795 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
 796                                struct drm_file *file)
 797 {
 798         struct drm_tegra_gem_set_flags *args = data;
 799         struct drm_gem_object *gem;
 800         struct tegra_bo *bo;
 801
 802         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
 803                 return -EINVAL;
 804
 805         gem = drm_gem_object_lookup(file, args->handle);
 806         if (!gem)
 807                 return -ENOENT;
 808
 809         bo = to_tegra_bo(gem);
 810         bo->flags = 0;
 811
 812         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
 813                 bo->flags |= TEGRA_BO_BOTTOM_UP;
 814
 815         drm_gem_object_unreference_unlocked(gem);
 816
 817         return 0;
 818 }
 819
 820 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
 821                                struct drm_file *file)
 822 {
 823         struct drm_tegra_gem_get_flags *args = data;
 824         struct drm_gem_object *gem;
 825         struct tegra_bo *bo;
 826
 827         gem = drm_gem_object_lookup(file, args->handle);
 828         if (!gem)
 829                 return -ENOENT;
 830
 831         bo = to_tegra_bo(gem);
 832         args->flags = 0;
 833
 834         if (bo->flags & TEGRA_BO_BOTTOM_UP)
 835                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
 836
 837         drm_gem_object_unreference_unlocked(gem);
 838
 839         return 0;
 840 }
 841 #endif
 842
 843 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
 844 #ifdef CONFIG_DRM_TEGRA_STAGING
 845         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, 0),
 846         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, 0),
 847         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, 0),
 848         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, 0),
 849         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, 0),
 850         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, 0),
 851         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, 0),
 852         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, 0),
 853         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, 0),
 854         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, 0),
 855         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, 0),
 856         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, 0),
 857         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, 0),
 858         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, 0),
 859 #endif
 860 };
 861
 862 static const struct file_operations tegra_drm_fops = {
 863         .owner = THIS_MODULE,
 864         .open = drm_open,
 865         .release = drm_release,
 866         .unlocked_ioctl = drm_ioctl,
 867         .mmap = tegra_drm_mmap,
 868         .poll = drm_poll,
 869         .read = drm_read,
 870         .compat_ioctl = drm_compat_ioctl,
 871         .llseek = noop_llseek,
 872 };
 873
 874 static int tegra_drm_context_cleanup(int id, void *p, void *data)
 875 {
 876         struct tegra_drm_context *context = p;
 877
 878         tegra_drm_context_free(context);
 879
 880         return 0;
 881 }
 882
 883 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
 884 {
 885         struct tegra_drm_file *fpriv = file->driver_priv;
 886
 887         mutex_lock(&fpriv->lock);
 888         idr_for_each(&fpriv->contexts, tegra_drm_context_cleanup, NULL);
 889         mutex_unlock(&fpriv->lock);
 890
 891         idr_destroy(&fpriv->contexts);
 892         mutex_destroy(&fpriv->lock);
 893         kfree(fpriv);
 894 }
 895
 896 #ifdef CONFIG_DEBUG_FS
 897 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
 898 {
 899         struct drm_info_node *node = (struct drm_info_node *)s->private;
 900         struct drm_device *drm = node->minor->dev;
 901         struct drm_framebuffer *fb;
 902
 903         mutex_lock(&drm->mode_config.fb_lock);
 904
 905         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
 906                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
 907                            fb->base.id, fb->width, fb->height,
 908                            fb->format->depth,
 909                            fb->format->cpp[0] * 8,
 910                            drm_framebuffer_read_refcount(fb));
 911         }
 912
 913         mutex_unlock(&drm->mode_config.fb_lock);
 914
 915         return 0;
 916 }
 917
 918 static int tegra_debugfs_iova(struct seq_file *s, void *data)
 919 {
 920         struct drm_info_node *node = (struct drm_info_node *)s->private;
 921         struct drm_device *drm = node->minor->dev;
 922         struct tegra_drm *tegra = drm->dev_private;
 923         struct drm_printer p = drm_seq_file_printer(s);
 924
 925         mutex_lock(&tegra->mm_lock);
 926         drm_mm_print(&tegra->mm, &p);
 927         mutex_unlock(&tegra->mm_lock);
 928
 929         return 0;
 930 }
 931
 932 static struct drm_info_list tegra_debugfs_list[] = {
 933         { "framebuffers", tegra_debugfs_framebuffers, 0 },
 934         { "iova", tegra_debugfs_iova, 0 },
 935 };
 936
 937 static int tegra_debugfs_init(struct drm_minor *minor)
 938 {
 939         return drm_debugfs_create_files(tegra_debugfs_list,
 940                                         ARRAY_SIZE(tegra_debugfs_list),
 941                                         minor->debugfs_root, minor);
 942 }
 943 #endif
 944
 945 static struct drm_driver tegra_drm_driver = {
 946         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
 947                            DRIVER_ATOMIC,
 948         .load = tegra_drm_load,
 949         .unload = tegra_drm_unload,
 950         .open = tegra_drm_open,
 951         .preclose = tegra_drm_preclose,
 952         .lastclose = tegra_drm_lastclose,
 953
 954 #if defined(CONFIG_DEBUG_FS)
 955         .debugfs_init = tegra_debugfs_init,
 956 #endif
 957
 958         .gem_free_object_unlocked = tegra_bo_free_object,
 959         .gem_vm_ops = &tegra_bo_vm_ops,
 960
 961         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 962         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 963         .gem_prime_export = tegra_gem_prime_export,
 964         .gem_prime_import = tegra_gem_prime_import,
 965
 966         .dumb_create = tegra_bo_dumb_create,
 967         .dumb_map_offset = tegra_bo_dumb_map_offset,
 968         .dumb_destroy = drm_gem_dumb_destroy,
 969
 970         .ioctls = tegra_drm_ioctls,
 971         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
 972         .fops = &tegra_drm_fops,
 973
 974         .name = DRIVER_NAME,
 975         .desc = DRIVER_DESC,
 976         .date = DRIVER_DATE,
 977         .major = DRIVER_MAJOR,
 978         .minor = DRIVER_MINOR,
 979         .patchlevel = DRIVER_PATCHLEVEL,
 980 };
 981
 982 int tegra_drm_register_client(struct tegra_drm *tegra,
 983                               struct tegra_drm_client *client)
 984 {
 985         mutex_lock(&tegra->clients_lock);
 986         list_add_tail(&client->list, &tegra->clients);
 987         mutex_unlock(&tegra->clients_lock);
 988
 989         return 0;
 990 }
 991
 992 int tegra_drm_unregister_client(struct tegra_drm *tegra,
 993                                 struct tegra_drm_client *client)
 994 {
 995         mutex_lock(&tegra->clients_lock);
 996         list_del_init(&client->list);
 997         mutex_unlock(&tegra->clients_lock);
 998
 999         return 0;
1000 }
1001
1002 void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size,
1003                               dma_addr_t *dma)
1004 {
1005         struct iova *alloc;
1006         void *virt;
1007         gfp_t gfp;
1008         int err;
1009
1010         if (tegra->domain)
1011                 size = iova_align(&tegra->carveout.domain, size);
1012         else
1013                 size = PAGE_ALIGN(size);
1014
1015         gfp = GFP_KERNEL | __GFP_ZERO;
1016         if (!tegra->domain) {
1017                 /*
1018                  * Many units only support 32-bit addresses, even on 64-bit
1019                  * SoCs. If there is no IOMMU to translate into a 32-bit IO
1020                  * virtual address space, force allocations to be in the
1021                  * lower 32-bit range.
1022                  */
1023                 gfp |= GFP_DMA;
1024         }
1025
1026         virt = (void *)__get_free_pages(gfp, get_order(size));
1027         if (!virt)
1028                 return ERR_PTR(-ENOMEM);
1029
1030         if (!tegra->domain) {
1031                 /*
1032                  * If IOMMU is disabled, devices address physical memory
1033                  * directly.
1034                  */
1035                 *dma = virt_to_phys(virt);
1036                 return virt;
1037         }
1038
1039         alloc = alloc_iova(&tegra->carveout.domain,
1040                            size >> tegra->carveout.shift,
1041                            tegra->carveout.limit, true);
1042         if (!alloc) {
1043                 err = -EBUSY;
1044                 goto free_pages;
1045         }
1046
1047         *dma = iova_dma_addr(&tegra->carveout.domain, alloc);
1048         err = iommu_map(tegra->domain, *dma, virt_to_phys(virt),
1049                         size, IOMMU_READ | IOMMU_WRITE);
1050         if (err < 0)
1051                 goto free_iova;
1052
1053         return virt;
1054
1055 free_iova:
1056         __free_iova(&tegra->carveout.domain, alloc);
1057 free_pages:
1058         free_pages((unsigned long)virt, get_order(size));
1059
1060         return ERR_PTR(err);
1061 }
1062
1063 void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
1064                     dma_addr_t dma)
1065 {
1066         if (tegra->domain)
1067                 size = iova_align(&tegra->carveout.domain, size);
1068         else
1069                 size = PAGE_ALIGN(size);
1070
1071         if (tegra->domain) {
1072                 iommu_unmap(tegra->domain, dma, size);
1073                 free_iova(&tegra->carveout.domain,
1074                           iova_pfn(&tegra->carveout.domain, dma));
1075         }
1076
1077         free_pages((unsigned long)virt, get_order(size));
1078 }
1079
1080 static int host1x_drm_probe(struct host1x_device *dev)
1081 {
1082         struct drm_driver *driver = &tegra_drm_driver;
1083         struct drm_device *drm;
1084         int err;
1085
1086         drm = drm_dev_alloc(driver, &dev->dev);
1087         if (IS_ERR(drm))
1088                 return PTR_ERR(drm);
1089
1090         dev_set_drvdata(&dev->dev, drm);
1091
1092         err = drm_dev_register(drm, 0);
1093         if (err < 0)
1094                 goto unref;
1095
1096         return 0;
1097
1098 unref:
1099         drm_dev_unref(drm);
1100         return err;
1101 }
1102
1103 static int host1x_drm_remove(struct host1x_device *dev)
1104 {
1105         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1106
1107         drm_dev_unregister(drm);
1108         drm_dev_unref(drm);
1109
1110         return 0;
1111 }
1112
1113 #ifdef CONFIG_PM_SLEEP
1114 static int host1x_drm_suspend(struct device *dev)
1115 {
1116         struct drm_device *drm = dev_get_drvdata(dev);
1117         struct tegra_drm *tegra = drm->dev_private;
1118
1119         drm_kms_helper_poll_disable(drm);
1120         tegra_drm_fb_suspend(drm);
1121
1122         tegra->state = drm_atomic_helper_suspend(drm);
1123         if (IS_ERR(tegra->state)) {
1124                 tegra_drm_fb_resume(drm);
1125                 drm_kms_helper_poll_enable(drm);
1126                 return PTR_ERR(tegra->state);
1127         }
1128
1129         return 0;
1130 }
1131
1132 static int host1x_drm_resume(struct device *dev)
1133 {
1134         struct drm_device *drm = dev_get_drvdata(dev);
1135         struct tegra_drm *tegra = drm->dev_private;
1136
1137         drm_atomic_helper_resume(drm, tegra->state);
1138         tegra_drm_fb_resume(drm);
1139         drm_kms_helper_poll_enable(drm);
1140
1141         return 0;
1142 }
1143 #endif
1144
1145 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1146                          host1x_drm_resume);
1147
1148 static const struct of_device_id host1x_drm_subdevs[] = {
1149         { .compatible = "nvidia,tegra20-dc", },
1150         { .compatible = "nvidia,tegra20-hdmi", },
1151         { .compatible = "nvidia,tegra20-gr2d", },
1152         { .compatible = "nvidia,tegra20-gr3d", },
1153         { .compatible = "nvidia,tegra30-dc", },
1154         { .compatible = "nvidia,tegra30-hdmi", },
1155         { .compatible = "nvidia,tegra30-gr2d", },
1156         { .compatible = "nvidia,tegra30-gr3d", },
1157         { .compatible = "nvidia,tegra114-dsi", },
1158         { .compatible = "nvidia,tegra114-hdmi", },
1159         { .compatible = "nvidia,tegra114-gr3d", },
1160         { .compatible = "nvidia,tegra124-dc", },
1161         { .compatible = "nvidia,tegra124-sor", },
1162         { .compatible = "nvidia,tegra124-hdmi", },
1163         { .compatible = "nvidia,tegra124-dsi", },
1164         { .compatible = "nvidia,tegra124-vic", },
1165         { .compatible = "nvidia,tegra132-dsi", },
1166         { .compatible = "nvidia,tegra210-dc", },
1167         { .compatible = "nvidia,tegra210-dsi", },
1168         { .compatible = "nvidia,tegra210-sor", },
1169         { .compatible = "nvidia,tegra210-sor1", },
1170         { .compatible = "nvidia,tegra210-vic", },
1171         { /* sentinel */ }
1172 };
1173
1174 static struct host1x_driver host1x_drm_driver = {
1175         .driver = {
1176                 .name = "drm",
1177                 .pm = &host1x_drm_pm_ops,
1178         },
1179         .probe = host1x_drm_probe,
1180         .remove = host1x_drm_remove,
1181         .subdevs = host1x_drm_subdevs,
1182 };
1183
1184 static struct platform_driver * const drivers[] = {
1185         &tegra_dc_driver,
1186         &tegra_hdmi_driver,
1187         &tegra_dsi_driver,
1188         &tegra_dpaux_driver,
1189         &tegra_sor_driver,
1190         &tegra_gr2d_driver,
1191         &tegra_gr3d_driver,
1192         &tegra_vic_driver,
1193 };
1194
1195 static int __init host1x_drm_init(void)
1196 {
1197         int err;
1198
1199         err = host1x_driver_register(&host1x_drm_driver);
1200         if (err < 0)
1201                 return err;
1202
1203         err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1204         if (err < 0)
1205                 goto unregister_host1x;
1206
1207         return 0;
1208
1209 unregister_host1x:
1210         host1x_driver_unregister(&host1x_drm_driver);
1211         return err;
1212 }
1213 module_init(host1x_drm_init);
1214
1215 static void __exit host1x_drm_exit(void)
1216 {
1217         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1218         host1x_driver_unregister(&host1x_drm_driver);
1219 }
1220 module_exit(host1x_drm_exit);
1221
1222 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1223 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1224 MODULE_LICENSE("GPL v2");