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, false);
  60	drm_atomic_helper_commit_modeset_enables(drm, state);
  61
  62	drm_atomic_helper_wait_for_vblanks(drm, state);
  63
  64	drm_atomic_helper_cleanup_planes(drm, state);
  65	drm_atomic_state_free(state);
  66}
  67
  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_FBDEV_EMULATION
 110	.output_poll_changed = tegra_fb_output_poll_changed,
 111#endif
 112	.atomic_check = drm_atomic_helper_check,
 113	.atomic_commit = tegra_atomic_commit,
 114};
 115
 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_DRIVER("IOMMU aperture initialized (%#llx-%#llx)\n",
 141				 start, end);
 142		drm_mm_init(&tegra->mm, start, end - start + 1);
 143	}
 144
 145	mutex_init(&tegra->clients_lock);
 146	INIT_LIST_HEAD(&tegra->clients);
 147
 148	mutex_init(&tegra->commit.lock);
 149	INIT_WORK(&tegra->commit.work, tegra_atomic_work);
 150
 151	drm->dev_private = tegra;
 152	tegra->drm = drm;
 153
 154	drm_mode_config_init(drm);
 155
 156	drm->mode_config.min_width = 0;
 157	drm->mode_config.min_height = 0;
 158
 159	drm->mode_config.max_width = 4096;
 160	drm->mode_config.max_height = 4096;
 161
 162	drm->mode_config.funcs = &tegra_drm_mode_funcs;
 163
 164	err = tegra_drm_fb_prepare(drm);
 165	if (err < 0)
 166		goto config;
 167
 168	drm_kms_helper_poll_init(drm);
 169
 170	err = host1x_device_init(device);
 171	if (err < 0)
 172		goto fbdev;
 173
 174	/*
 175	 * We don't use the drm_irq_install() helpers provided by the DRM
 176	 * core, so we need to set this manually in order to allow the
 177	 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 178	 */
 179	drm->irq_enabled = true;
 180
 181	/* syncpoints are used for full 32-bit hardware VBLANK counters */
 182	drm->max_vblank_count = 0xffffffff;
 183	drm->vblank_disable_allowed = true;
 184
 185	err = drm_vblank_init(drm, drm->mode_config.num_crtc);
 186	if (err < 0)
 187		goto device;
 188
 189	drm_mode_config_reset(drm);
 190
 191	err = tegra_drm_fb_init(drm);
 192	if (err < 0)
 193		goto vblank;
 194
 195	return 0;
 196
 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_FBDEV_EMULATION
 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	drm_gem_object_unreference_unlocked(gem);
 
 
 281
 282	bo = to_tegra_bo(gem);
 283	return &bo->base;
 284}
 285
 286static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
 287				       struct drm_tegra_reloc __user *src,
 288				       struct drm_device *drm,
 289				       struct drm_file *file)
 290{
 291	u32 cmdbuf, target;
 292	int err;
 293
 294	err = get_user(cmdbuf, &src->cmdbuf.handle);
 295	if (err < 0)
 296		return err;
 297
 298	err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
 299	if (err < 0)
 300		return err;
 301
 302	err = get_user(target, &src->target.handle);
 303	if (err < 0)
 304		return err;
 305
 306	err = get_user(dest->target.offset, &src->target.offset);
 307	if (err < 0)
 308		return err;
 309
 310	err = get_user(dest->shift, &src->shift);
 311	if (err < 0)
 312		return err;
 313
 314	dest->cmdbuf.bo = host1x_bo_lookup(drm, file, cmdbuf);
 315	if (!dest->cmdbuf.bo)
 316		return -ENOENT;
 317
 318	dest->target.bo = host1x_bo_lookup(drm, file, target);
 319	if (!dest->target.bo)
 320		return -ENOENT;
 321
 322	return 0;
 323}
 324
 325int tegra_drm_submit(struct tegra_drm_context *context,
 326		     struct drm_tegra_submit *args, struct drm_device *drm,
 327		     struct drm_file *file)
 328{
 329	unsigned int num_cmdbufs = args->num_cmdbufs;
 330	unsigned int num_relocs = args->num_relocs;
 331	unsigned int num_waitchks = args->num_waitchks;
 332	struct drm_tegra_cmdbuf __user *cmdbufs =
 333		(void __user *)(uintptr_t)args->cmdbufs;
 334	struct drm_tegra_reloc __user *relocs =
 335		(void __user *)(uintptr_t)args->relocs;
 336	struct drm_tegra_waitchk __user *waitchks =
 337		(void __user *)(uintptr_t)args->waitchks;
 338	struct drm_tegra_syncpt syncpt;
 339	struct host1x_job *job;
 340	int err;
 341
 342	/* We don't yet support other than one syncpt_incr struct per submit */
 343	if (args->num_syncpts != 1)
 344		return -EINVAL;
 345
 346	job = host1x_job_alloc(context->channel, args->num_cmdbufs,
 347			       args->num_relocs, args->num_waitchks);
 348	if (!job)
 349		return -ENOMEM;
 350
 351	job->num_relocs = args->num_relocs;
 352	job->num_waitchk = args->num_waitchks;
 353	job->client = (u32)args->context;
 354	job->class = context->client->base.class;
 355	job->serialize = true;
 356
 357	while (num_cmdbufs) {
 358		struct drm_tegra_cmdbuf cmdbuf;
 359		struct host1x_bo *bo;
 360
 361		if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
 362			err = -EFAULT;
 363			goto fail;
 364		}
 365
 366		bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
 367		if (!bo) {
 368			err = -ENOENT;
 369			goto fail;
 370		}
 371
 372		host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
 373		num_cmdbufs--;
 374		cmdbufs++;
 375	}
 376
 377	/* copy and resolve relocations from submit */
 
 
 
 
 
 378	while (num_relocs--) {
 379		err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
 380						  &relocs[num_relocs], drm,
 381						  file);
 382		if (err < 0)
 
 
 
 
 
 
 
 383			goto fail;
 
 384	}
 385
 386	if (copy_from_user(job->waitchk, waitchks,
 387			   sizeof(*waitchks) * num_waitchks)) {
 388		err = -EFAULT;
 389		goto fail;
 390	}
 391
 392	if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
 393			   sizeof(syncpt))) {
 394		err = -EFAULT;
 395		goto fail;
 396	}
 397
 398	job->is_addr_reg = context->client->ops->is_addr_reg;
 399	job->syncpt_incrs = syncpt.incrs;
 400	job->syncpt_id = syncpt.id;
 401	job->timeout = 10000;
 402
 403	if (args->timeout && args->timeout < 10000)
 404		job->timeout = args->timeout;
 405
 406	err = host1x_job_pin(job, context->client->base.dev);
 407	if (err)
 408		goto fail;
 409
 410	err = host1x_job_submit(job);
 411	if (err)
 412		goto fail_submit;
 413
 414	args->fence = job->syncpt_end;
 415
 416	host1x_job_put(job);
 417	return 0;
 418
 419fail_submit:
 420	host1x_job_unpin(job);
 421fail:
 422	host1x_job_put(job);
 423	return err;
 424}
 425
 426
 427#ifdef CONFIG_DRM_TEGRA_STAGING
 428static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
 429{
 430	return (struct tegra_drm_context *)(uintptr_t)context;
 431}
 432
 433static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
 434					struct tegra_drm_context *context)
 435{
 436	struct tegra_drm_context *ctx;
 437
 438	list_for_each_entry(ctx, &file->contexts, list)
 439		if (ctx == context)
 440			return true;
 441
 442	return false;
 443}
 444
 445static int tegra_gem_create(struct drm_device *drm, void *data,
 446			    struct drm_file *file)
 447{
 448	struct drm_tegra_gem_create *args = data;
 449	struct tegra_bo *bo;
 450
 451	bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
 452					 &args->handle);
 453	if (IS_ERR(bo))
 454		return PTR_ERR(bo);
 455
 456	return 0;
 457}
 458
 459static int tegra_gem_mmap(struct drm_device *drm, void *data,
 460			  struct drm_file *file)
 461{
 462	struct drm_tegra_gem_mmap *args = data;
 463	struct drm_gem_object *gem;
 464	struct tegra_bo *bo;
 465
 466	gem = drm_gem_object_lookup(drm, file, args->handle);
 467	if (!gem)
 468		return -EINVAL;
 469
 470	bo = to_tegra_bo(gem);
 471
 472	args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
 473
 474	drm_gem_object_unreference_unlocked(gem);
 475
 476	return 0;
 477}
 478
 479static int tegra_syncpt_read(struct drm_device *drm, void *data,
 480			     struct drm_file *file)
 481{
 482	struct host1x *host = dev_get_drvdata(drm->dev->parent);
 483	struct drm_tegra_syncpt_read *args = data;
 484	struct host1x_syncpt *sp;
 485
 486	sp = host1x_syncpt_get(host, args->id);
 487	if (!sp)
 488		return -EINVAL;
 489
 490	args->value = host1x_syncpt_read_min(sp);
 491	return 0;
 492}
 493
 494static int tegra_syncpt_incr(struct drm_device *drm, void *data,
 495			     struct drm_file *file)
 496{
 497	struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 498	struct drm_tegra_syncpt_incr *args = data;
 499	struct host1x_syncpt *sp;
 500
 501	sp = host1x_syncpt_get(host1x, args->id);
 502	if (!sp)
 503		return -EINVAL;
 504
 505	return host1x_syncpt_incr(sp);
 506}
 507
 508static int tegra_syncpt_wait(struct drm_device *drm, void *data,
 509			     struct drm_file *file)
 510{
 511	struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 512	struct drm_tegra_syncpt_wait *args = data;
 513	struct host1x_syncpt *sp;
 514
 515	sp = host1x_syncpt_get(host1x, args->id);
 516	if (!sp)
 517		return -EINVAL;
 518
 519	return host1x_syncpt_wait(sp, args->thresh, args->timeout,
 520				  &args->value);
 521}
 522
 523static int tegra_open_channel(struct drm_device *drm, void *data,
 524			      struct drm_file *file)
 525{
 526	struct tegra_drm_file *fpriv = file->driver_priv;
 527	struct tegra_drm *tegra = drm->dev_private;
 528	struct drm_tegra_open_channel *args = data;
 529	struct tegra_drm_context *context;
 530	struct tegra_drm_client *client;
 531	int err = -ENODEV;
 532
 533	context = kzalloc(sizeof(*context), GFP_KERNEL);
 534	if (!context)
 535		return -ENOMEM;
 536
 537	list_for_each_entry(client, &tegra->clients, list)
 538		if (client->base.class == args->client) {
 539			err = client->ops->open_channel(client, context);
 540			if (err)
 541				break;
 542
 543			list_add(&context->list, &fpriv->contexts);
 544			args->context = (uintptr_t)context;
 545			context->client = client;
 546			return 0;
 547		}
 548
 549	kfree(context);
 550	return err;
 551}
 552
 553static int tegra_close_channel(struct drm_device *drm, void *data,
 554			       struct drm_file *file)
 555{
 556	struct tegra_drm_file *fpriv = file->driver_priv;
 557	struct drm_tegra_close_channel *args = data;
 558	struct tegra_drm_context *context;
 559
 560	context = tegra_drm_get_context(args->context);
 561
 562	if (!tegra_drm_file_owns_context(fpriv, context))
 563		return -EINVAL;
 564
 565	list_del(&context->list);
 566	tegra_drm_context_free(context);
 567
 568	return 0;
 569}
 570
 571static int tegra_get_syncpt(struct drm_device *drm, void *data,
 572			    struct drm_file *file)
 573{
 574	struct tegra_drm_file *fpriv = file->driver_priv;
 575	struct drm_tegra_get_syncpt *args = data;
 576	struct tegra_drm_context *context;
 577	struct host1x_syncpt *syncpt;
 578
 579	context = tegra_drm_get_context(args->context);
 580
 581	if (!tegra_drm_file_owns_context(fpriv, context))
 582		return -ENODEV;
 583
 584	if (args->index >= context->client->base.num_syncpts)
 585		return -EINVAL;
 586
 587	syncpt = context->client->base.syncpts[args->index];
 588	args->id = host1x_syncpt_id(syncpt);
 589
 590	return 0;
 591}
 592
 593static int tegra_submit(struct drm_device *drm, void *data,
 594			struct drm_file *file)
 595{
 596	struct tegra_drm_file *fpriv = file->driver_priv;
 597	struct drm_tegra_submit *args = data;
 598	struct tegra_drm_context *context;
 599
 600	context = tegra_drm_get_context(args->context);
 601
 602	if (!tegra_drm_file_owns_context(fpriv, context))
 603		return -ENODEV;
 604
 605	return context->client->ops->submit(context, args, drm, file);
 606}
 607
 608static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
 609				 struct drm_file *file)
 610{
 611	struct tegra_drm_file *fpriv = file->driver_priv;
 612	struct drm_tegra_get_syncpt_base *args = data;
 613	struct tegra_drm_context *context;
 614	struct host1x_syncpt_base *base;
 615	struct host1x_syncpt *syncpt;
 616
 617	context = tegra_drm_get_context(args->context);
 618
 619	if (!tegra_drm_file_owns_context(fpriv, context))
 620		return -ENODEV;
 621
 622	if (args->syncpt >= context->client->base.num_syncpts)
 623		return -EINVAL;
 624
 625	syncpt = context->client->base.syncpts[args->syncpt];
 626
 627	base = host1x_syncpt_get_base(syncpt);
 628	if (!base)
 629		return -ENXIO;
 630
 631	args->id = host1x_syncpt_base_id(base);
 632
 633	return 0;
 634}
 635
 636static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
 637				struct drm_file *file)
 638{
 639	struct drm_tegra_gem_set_tiling *args = data;
 640	enum tegra_bo_tiling_mode mode;
 641	struct drm_gem_object *gem;
 642	unsigned long value = 0;
 643	struct tegra_bo *bo;
 644
 645	switch (args->mode) {
 646	case DRM_TEGRA_GEM_TILING_MODE_PITCH:
 647		mode = TEGRA_BO_TILING_MODE_PITCH;
 648
 649		if (args->value != 0)
 650			return -EINVAL;
 651
 652		break;
 653
 654	case DRM_TEGRA_GEM_TILING_MODE_TILED:
 655		mode = TEGRA_BO_TILING_MODE_TILED;
 656
 657		if (args->value != 0)
 658			return -EINVAL;
 659
 660		break;
 661
 662	case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
 663		mode = TEGRA_BO_TILING_MODE_BLOCK;
 664
 665		if (args->value > 5)
 666			return -EINVAL;
 667
 668		value = args->value;
 669		break;
 670
 671	default:
 672		return -EINVAL;
 673	}
 674
 675	gem = drm_gem_object_lookup(drm, file, args->handle);
 676	if (!gem)
 677		return -ENOENT;
 678
 679	bo = to_tegra_bo(gem);
 680
 681	bo->tiling.mode = mode;
 682	bo->tiling.value = value;
 683
 684	drm_gem_object_unreference_unlocked(gem);
 685
 686	return 0;
 687}
 688
 689static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
 690				struct drm_file *file)
 691{
 692	struct drm_tegra_gem_get_tiling *args = data;
 693	struct drm_gem_object *gem;
 694	struct tegra_bo *bo;
 695	int err = 0;
 696
 697	gem = drm_gem_object_lookup(drm, file, args->handle);
 698	if (!gem)
 699		return -ENOENT;
 700
 701	bo = to_tegra_bo(gem);
 702
 703	switch (bo->tiling.mode) {
 704	case TEGRA_BO_TILING_MODE_PITCH:
 705		args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
 706		args->value = 0;
 707		break;
 708
 709	case TEGRA_BO_TILING_MODE_TILED:
 710		args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
 711		args->value = 0;
 712		break;
 713
 714	case TEGRA_BO_TILING_MODE_BLOCK:
 715		args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
 716		args->value = bo->tiling.value;
 717		break;
 718
 719	default:
 720		err = -EINVAL;
 721		break;
 722	}
 723
 724	drm_gem_object_unreference_unlocked(gem);
 725
 726	return err;
 727}
 728
 729static int tegra_gem_set_flags(struct drm_device *drm, void *data,
 730			       struct drm_file *file)
 731{
 732	struct drm_tegra_gem_set_flags *args = data;
 733	struct drm_gem_object *gem;
 734	struct tegra_bo *bo;
 735
 736	if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
 737		return -EINVAL;
 738
 739	gem = drm_gem_object_lookup(drm, file, args->handle);
 740	if (!gem)
 741		return -ENOENT;
 742
 743	bo = to_tegra_bo(gem);
 744	bo->flags = 0;
 745
 746	if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
 747		bo->flags |= TEGRA_BO_BOTTOM_UP;
 748
 749	drm_gem_object_unreference_unlocked(gem);
 750
 751	return 0;
 752}
 753
 754static int tegra_gem_get_flags(struct drm_device *drm, void *data,
 755			       struct drm_file *file)
 756{
 757	struct drm_tegra_gem_get_flags *args = data;
 758	struct drm_gem_object *gem;
 759	struct tegra_bo *bo;
 760
 761	gem = drm_gem_object_lookup(drm, file, args->handle);
 762	if (!gem)
 763		return -ENOENT;
 764
 765	bo = to_tegra_bo(gem);
 766	args->flags = 0;
 767
 768	if (bo->flags & TEGRA_BO_BOTTOM_UP)
 769		args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
 770
 771	drm_gem_object_unreference_unlocked(gem);
 772
 773	return 0;
 774}
 775#endif
 776
 777static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
 778#ifdef CONFIG_DRM_TEGRA_STAGING
 779	DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, 0),
 780	DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, 0),
 781	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, 0),
 782	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, 0),
 783	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, 0),
 784	DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, 0),
 785	DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, 0),
 786	DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, 0),
 787	DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, 0),
 788	DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, 0),
 789	DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, 0),
 790	DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, 0),
 791	DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, 0),
 792	DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, 0),
 793#endif
 794};
 795
 796static const struct file_operations tegra_drm_fops = {
 797	.owner = THIS_MODULE,
 798	.open = drm_open,
 799	.release = drm_release,
 800	.unlocked_ioctl = drm_ioctl,
 801	.mmap = tegra_drm_mmap,
 802	.poll = drm_poll,
 803	.read = drm_read,
 804#ifdef CONFIG_COMPAT
 805	.compat_ioctl = drm_compat_ioctl,
 806#endif
 807	.llseek = noop_llseek,
 808};
 809
 810static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
 811					     unsigned int pipe)
 812{
 813	struct drm_crtc *crtc;
 814
 815	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
 816		if (pipe == drm_crtc_index(crtc))
 
 
 817			return crtc;
 818	}
 819
 820	return NULL;
 821}
 822
 823static u32 tegra_drm_get_vblank_counter(struct drm_device *drm,
 824					unsigned int pipe)
 825{
 826	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 827	struct tegra_dc *dc = to_tegra_dc(crtc);
 828
 829	if (!crtc)
 830		return 0;
 831
 832	return tegra_dc_get_vblank_counter(dc);
 833}
 834
 835static int tegra_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
 836{
 837	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 838	struct tegra_dc *dc = to_tegra_dc(crtc);
 839
 840	if (!crtc)
 841		return -ENODEV;
 842
 843	tegra_dc_enable_vblank(dc);
 844
 845	return 0;
 846}
 847
 848static void tegra_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
 849{
 850	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 851	struct tegra_dc *dc = to_tegra_dc(crtc);
 852
 853	if (crtc)
 854		tegra_dc_disable_vblank(dc);
 855}
 856
 857static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
 858{
 859	struct tegra_drm_file *fpriv = file->driver_priv;
 860	struct tegra_drm_context *context, *tmp;
 
 
 
 
 861
 862	list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
 863		tegra_drm_context_free(context);
 864
 865	kfree(fpriv);
 866}
 867
 868#ifdef CONFIG_DEBUG_FS
 869static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
 870{
 871	struct drm_info_node *node = (struct drm_info_node *)s->private;
 872	struct drm_device *drm = node->minor->dev;
 873	struct drm_framebuffer *fb;
 874
 875	mutex_lock(&drm->mode_config.fb_lock);
 876
 877	list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
 878		seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
 879			   fb->base.id, fb->width, fb->height, fb->depth,
 880			   fb->bits_per_pixel,
 881			   atomic_read(&fb->refcount.refcount));
 882	}
 883
 884	mutex_unlock(&drm->mode_config.fb_lock);
 885
 886	return 0;
 887}
 888
 889static int tegra_debugfs_iova(struct seq_file *s, void *data)
 890{
 891	struct drm_info_node *node = (struct drm_info_node *)s->private;
 892	struct drm_device *drm = node->minor->dev;
 893	struct tegra_drm *tegra = drm->dev_private;
 894
 895	return drm_mm_dump_table(s, &tegra->mm);
 896}
 897
 898static struct drm_info_list tegra_debugfs_list[] = {
 899	{ "framebuffers", tegra_debugfs_framebuffers, 0 },
 900	{ "iova", tegra_debugfs_iova, 0 },
 901};
 902
 903static int tegra_debugfs_init(struct drm_minor *minor)
 904{
 905	return drm_debugfs_create_files(tegra_debugfs_list,
 906					ARRAY_SIZE(tegra_debugfs_list),
 907					minor->debugfs_root, minor);
 908}
 909
 910static void tegra_debugfs_cleanup(struct drm_minor *minor)
 911{
 912	drm_debugfs_remove_files(tegra_debugfs_list,
 913				 ARRAY_SIZE(tegra_debugfs_list), minor);
 914}
 915#endif
 916
 917static struct drm_driver tegra_drm_driver = {
 918	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
 919			   DRIVER_ATOMIC,
 920	.load = tegra_drm_load,
 921	.unload = tegra_drm_unload,
 922	.open = tegra_drm_open,
 923	.preclose = tegra_drm_preclose,
 924	.lastclose = tegra_drm_lastclose,
 925
 926	.get_vblank_counter = tegra_drm_get_vblank_counter,
 927	.enable_vblank = tegra_drm_enable_vblank,
 928	.disable_vblank = tegra_drm_disable_vblank,
 929
 930#if defined(CONFIG_DEBUG_FS)
 931	.debugfs_init = tegra_debugfs_init,
 932	.debugfs_cleanup = tegra_debugfs_cleanup,
 933#endif
 934
 935	.gem_free_object = tegra_bo_free_object,
 936	.gem_vm_ops = &tegra_bo_vm_ops,
 937
 938	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 939	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 940	.gem_prime_export = tegra_gem_prime_export,
 941	.gem_prime_import = tegra_gem_prime_import,
 942
 943	.dumb_create = tegra_bo_dumb_create,
 944	.dumb_map_offset = tegra_bo_dumb_map_offset,
 945	.dumb_destroy = drm_gem_dumb_destroy,
 946
 947	.ioctls = tegra_drm_ioctls,
 948	.num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
 949	.fops = &tegra_drm_fops,
 950
 951	.name = DRIVER_NAME,
 952	.desc = DRIVER_DESC,
 953	.date = DRIVER_DATE,
 954	.major = DRIVER_MAJOR,
 955	.minor = DRIVER_MINOR,
 956	.patchlevel = DRIVER_PATCHLEVEL,
 957};
 958
 959int tegra_drm_register_client(struct tegra_drm *tegra,
 960			      struct tegra_drm_client *client)
 961{
 962	mutex_lock(&tegra->clients_lock);
 963	list_add_tail(&client->list, &tegra->clients);
 964	mutex_unlock(&tegra->clients_lock);
 965
 966	return 0;
 967}
 968
 969int tegra_drm_unregister_client(struct tegra_drm *tegra,
 970				struct tegra_drm_client *client)
 971{
 972	mutex_lock(&tegra->clients_lock);
 973	list_del_init(&client->list);
 974	mutex_unlock(&tegra->clients_lock);
 975
 976	return 0;
 977}
 978
 979static int host1x_drm_probe(struct host1x_device *dev)
 980{
 981	struct drm_driver *driver = &tegra_drm_driver;
 982	struct drm_device *drm;
 983	int err;
 984
 985	drm = drm_dev_alloc(driver, &dev->dev);
 986	if (!drm)
 987		return -ENOMEM;
 988
 989	dev_set_drvdata(&dev->dev, drm);
 990
 991	err = drm_dev_register(drm, 0);
 992	if (err < 0)
 993		goto unref;
 994
 995	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
 996		 driver->major, driver->minor, driver->patchlevel,
 997		 driver->date, drm->primary->index);
 998
 999	return 0;
1000
1001unref:
1002	drm_dev_unref(drm);
1003	return err;
1004}
1005
1006static int host1x_drm_remove(struct host1x_device *dev)
1007{
1008	struct drm_device *drm = dev_get_drvdata(&dev->dev);
1009
1010	drm_dev_unregister(drm);
1011	drm_dev_unref(drm);
1012
1013	return 0;
1014}
1015
1016#ifdef CONFIG_PM_SLEEP
1017static int host1x_drm_suspend(struct device *dev)
1018{
1019	struct drm_device *drm = dev_get_drvdata(dev);
1020	struct tegra_drm *tegra = drm->dev_private;
1021
1022	drm_kms_helper_poll_disable(drm);
1023	tegra_drm_fb_suspend(drm);
1024
1025	tegra->state = drm_atomic_helper_suspend(drm);
1026	if (IS_ERR(tegra->state)) {
1027		tegra_drm_fb_resume(drm);
1028		drm_kms_helper_poll_enable(drm);
1029		return PTR_ERR(tegra->state);
1030	}
1031
1032	return 0;
1033}
1034
1035static int host1x_drm_resume(struct device *dev)
1036{
1037	struct drm_device *drm = dev_get_drvdata(dev);
1038	struct tegra_drm *tegra = drm->dev_private;
1039
1040	drm_atomic_helper_resume(drm, tegra->state);
1041	tegra_drm_fb_resume(drm);
1042	drm_kms_helper_poll_enable(drm);
1043
1044	return 0;
1045}
1046#endif
1047
1048static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1049			 host1x_drm_resume);
1050
1051static const struct of_device_id host1x_drm_subdevs[] = {
1052	{ .compatible = "nvidia,tegra20-dc", },
1053	{ .compatible = "nvidia,tegra20-hdmi", },
1054	{ .compatible = "nvidia,tegra20-gr2d", },
1055	{ .compatible = "nvidia,tegra20-gr3d", },
1056	{ .compatible = "nvidia,tegra30-dc", },
1057	{ .compatible = "nvidia,tegra30-hdmi", },
1058	{ .compatible = "nvidia,tegra30-gr2d", },
1059	{ .compatible = "nvidia,tegra30-gr3d", },
1060	{ .compatible = "nvidia,tegra114-dsi", },
1061	{ .compatible = "nvidia,tegra114-hdmi", },
1062	{ .compatible = "nvidia,tegra114-gr3d", },
1063	{ .compatible = "nvidia,tegra124-dc", },
1064	{ .compatible = "nvidia,tegra124-sor", },
1065	{ .compatible = "nvidia,tegra124-hdmi", },
1066	{ .compatible = "nvidia,tegra124-dsi", },
1067	{ .compatible = "nvidia,tegra132-dsi", },
1068	{ .compatible = "nvidia,tegra210-dc", },
1069	{ .compatible = "nvidia,tegra210-dsi", },
1070	{ .compatible = "nvidia,tegra210-sor", },
1071	{ .compatible = "nvidia,tegra210-sor1", },
1072	{ /* sentinel */ }
1073};
1074
1075static struct host1x_driver host1x_drm_driver = {
1076	.driver = {
1077		.name = "drm",
1078		.pm = &host1x_drm_pm_ops,
1079	},
1080	.probe = host1x_drm_probe,
1081	.remove = host1x_drm_remove,
1082	.subdevs = host1x_drm_subdevs,
1083};
1084
1085static struct platform_driver * const drivers[] = {
1086	&tegra_dc_driver,
1087	&tegra_hdmi_driver,
1088	&tegra_dsi_driver,
1089	&tegra_dpaux_driver,
1090	&tegra_sor_driver,
1091	&tegra_gr2d_driver,
1092	&tegra_gr3d_driver,
1093};
1094
1095static int __init host1x_drm_init(void)
1096{
1097	int err;
1098
1099	err = host1x_driver_register(&host1x_drm_driver);
1100	if (err < 0)
1101		return err;
1102
1103	err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1104	if (err < 0)
1105		goto unregister_host1x;
1106
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1107	return 0;
1108
 
 
 
 
 
 
 
 
 
 
 
 
1109unregister_host1x:
1110	host1x_driver_unregister(&host1x_drm_driver);
1111	return err;
1112}
1113module_init(host1x_drm_init);
1114
1115static void __exit host1x_drm_exit(void)
1116{
1117	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 
 
 
 
 
 
1118	host1x_driver_unregister(&host1x_drm_driver);
1119}
1120module_exit(host1x_drm_exit);
1121
1122MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1123MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1124MODULE_LICENSE("GPL v2");