xref: /linux/drivers/gpu/drm/tegra/drm.c (revision 32786fdc9506aeba98278c1844d4bfb766863832)
1 /*
2  * Copyright (C) 2012 Avionic Design GmbH
3  * Copyright (C) 2012-2013 NVIDIA CORPORATION.  All rights reserved.
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  */
9 
10 #include <linux/host1x.h>
11 #include <linux/iommu.h>
12 
13 #include <drm/drm_atomic.h>
14 #include <drm/drm_atomic_helper.h>
15 
16 #include "drm.h"
17 #include "gem.h"
18 
19 #define DRIVER_NAME "tegra"
20 #define DRIVER_DESC "NVIDIA Tegra graphics"
21 #define DRIVER_DATE "20120330"
22 #define DRIVER_MAJOR 0
23 #define DRIVER_MINOR 0
24 #define DRIVER_PATCHLEVEL 0
25 
26 struct tegra_drm_file {
27 	struct list_head contexts;
28 };
29 
30 static void tegra_atomic_schedule(struct tegra_drm *tegra,
31 				  struct drm_atomic_state *state)
32 {
33 	tegra->commit.state = state;
34 	schedule_work(&tegra->commit.work);
35 }
36 
37 static void tegra_atomic_complete(struct tegra_drm *tegra,
38 				  struct drm_atomic_state *state)
39 {
40 	struct drm_device *drm = tegra->drm;
41 
42 	/*
43 	 * Everything below can be run asynchronously without the need to grab
44 	 * any modeset locks at all under one condition: It must be guaranteed
45 	 * that the asynchronous work has either been cancelled (if the driver
46 	 * supports it, which at least requires that the framebuffers get
47 	 * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
48 	 * before the new state gets committed on the software side with
49 	 * drm_atomic_helper_swap_state().
50 	 *
51 	 * This scheme allows new atomic state updates to be prepared and
52 	 * checked in parallel to the asynchronous completion of the previous
53 	 * update. Which is important since compositors need to figure out the
54 	 * composition of the next frame right after having submitted the
55 	 * current layout.
56 	 */
57 
58 	drm_atomic_helper_commit_modeset_disables(drm, state);
59 	drm_atomic_helper_commit_modeset_enables(drm, state);
60 	drm_atomic_helper_commit_planes(drm, state,
61 					DRM_PLANE_COMMIT_ACTIVE_ONLY);
62 
63 	drm_atomic_helper_wait_for_vblanks(drm, state);
64 
65 	drm_atomic_helper_cleanup_planes(drm, state);
66 	drm_atomic_state_put(state);
67 }
68 
69 static void tegra_atomic_work(struct work_struct *work)
70 {
71 	struct tegra_drm *tegra = container_of(work, struct tegra_drm,
72 					       commit.work);
73 
74 	tegra_atomic_complete(tegra, tegra->commit.state);
75 }
76 
77 static int tegra_atomic_commit(struct drm_device *drm,
78 			       struct drm_atomic_state *state, bool nonblock)
79 {
80 	struct tegra_drm *tegra = drm->dev_private;
81 	int err;
82 
83 	err = drm_atomic_helper_prepare_planes(drm, state);
84 	if (err)
85 		return err;
86 
87 	/* serialize outstanding nonblocking commits */
88 	mutex_lock(&tegra->commit.lock);
89 	flush_work(&tegra->commit.work);
90 
91 	/*
92 	 * This is the point of no return - everything below never fails except
93 	 * when the hw goes bonghits. Which means we can commit the new state on
94 	 * the software side now.
95 	 */
96 
97 	drm_atomic_helper_swap_state(state, true);
98 
99 	drm_atomic_state_get(state);
100 	if (nonblock)
101 		tegra_atomic_schedule(tegra, state);
102 	else
103 		tegra_atomic_complete(tegra, state);
104 
105 	mutex_unlock(&tegra->commit.lock);
106 	return 0;
107 }
108 
109 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
110 	.fb_create = tegra_fb_create,
111 #ifdef CONFIG_DRM_FBDEV_EMULATION
112 	.output_poll_changed = tegra_fb_output_poll_changed,
113 #endif
114 	.atomic_check = drm_atomic_helper_check,
115 	.atomic_commit = tegra_atomic_commit,
116 };
117 
118 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
119 {
120 	struct host1x_device *device = to_host1x_device(drm->dev);
121 	struct tegra_drm *tegra;
122 	int err;
123 
124 	tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
125 	if (!tegra)
126 		return -ENOMEM;
127 
128 	if (iommu_present(&platform_bus_type)) {
129 		struct iommu_domain_geometry *geometry;
130 		u64 start, end;
131 
132 		tegra->domain = iommu_domain_alloc(&platform_bus_type);
133 		if (!tegra->domain) {
134 			err = -ENOMEM;
135 			goto free;
136 		}
137 
138 		geometry = &tegra->domain->geometry;
139 		start = geometry->aperture_start;
140 		end = geometry->aperture_end;
141 
142 		DRM_DEBUG_DRIVER("IOMMU aperture initialized (%#llx-%#llx)\n",
143 				 start, end);
144 		drm_mm_init(&tegra->mm, start, end - start + 1);
145 	}
146 
147 	mutex_init(&tegra->clients_lock);
148 	INIT_LIST_HEAD(&tegra->clients);
149 
150 	mutex_init(&tegra->commit.lock);
151 	INIT_WORK(&tegra->commit.work, tegra_atomic_work);
152 
153 	drm->dev_private = tegra;
154 	tegra->drm = drm;
155 
156 	drm_mode_config_init(drm);
157 
158 	drm->mode_config.min_width = 0;
159 	drm->mode_config.min_height = 0;
160 
161 	drm->mode_config.max_width = 4096;
162 	drm->mode_config.max_height = 4096;
163 
164 	drm->mode_config.funcs = &tegra_drm_mode_funcs;
165 
166 	err = tegra_drm_fb_prepare(drm);
167 	if (err < 0)
168 		goto config;
169 
170 	drm_kms_helper_poll_init(drm);
171 
172 	err = host1x_device_init(device);
173 	if (err < 0)
174 		goto fbdev;
175 
176 	/*
177 	 * We don't use the drm_irq_install() helpers provided by the DRM
178 	 * core, so we need to set this manually in order to allow the
179 	 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
180 	 */
181 	drm->irq_enabled = true;
182 
183 	/* syncpoints are used for full 32-bit hardware VBLANK counters */
184 	drm->max_vblank_count = 0xffffffff;
185 
186 	err = drm_vblank_init(drm, drm->mode_config.num_crtc);
187 	if (err < 0)
188 		goto device;
189 
190 	drm_mode_config_reset(drm);
191 
192 	err = tegra_drm_fb_init(drm);
193 	if (err < 0)
194 		goto vblank;
195 
196 	return 0;
197 
198 vblank:
199 	drm_vblank_cleanup(drm);
200 device:
201 	host1x_device_exit(device);
202 fbdev:
203 	drm_kms_helper_poll_fini(drm);
204 	tegra_drm_fb_free(drm);
205 config:
206 	drm_mode_config_cleanup(drm);
207 
208 	if (tegra->domain) {
209 		iommu_domain_free(tegra->domain);
210 		drm_mm_takedown(&tegra->mm);
211 	}
212 free:
213 	kfree(tegra);
214 	return err;
215 }
216 
217 static int tegra_drm_unload(struct drm_device *drm)
218 {
219 	struct host1x_device *device = to_host1x_device(drm->dev);
220 	struct tegra_drm *tegra = drm->dev_private;
221 	int err;
222 
223 	drm_kms_helper_poll_fini(drm);
224 	tegra_drm_fb_exit(drm);
225 	drm_mode_config_cleanup(drm);
226 	drm_vblank_cleanup(drm);
227 
228 	err = host1x_device_exit(device);
229 	if (err < 0)
230 		return err;
231 
232 	if (tegra->domain) {
233 		iommu_domain_free(tegra->domain);
234 		drm_mm_takedown(&tegra->mm);
235 	}
236 
237 	kfree(tegra);
238 
239 	return 0;
240 }
241 
242 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
243 {
244 	struct tegra_drm_file *fpriv;
245 
246 	fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
247 	if (!fpriv)
248 		return -ENOMEM;
249 
250 	INIT_LIST_HEAD(&fpriv->contexts);
251 	filp->driver_priv = fpriv;
252 
253 	return 0;
254 }
255 
256 static void tegra_drm_context_free(struct tegra_drm_context *context)
257 {
258 	context->client->ops->close_channel(context);
259 	kfree(context);
260 }
261 
262 static void tegra_drm_lastclose(struct drm_device *drm)
263 {
264 #ifdef CONFIG_DRM_FBDEV_EMULATION
265 	struct tegra_drm *tegra = drm->dev_private;
266 
267 	tegra_fbdev_restore_mode(tegra->fbdev);
268 #endif
269 }
270 
271 static struct host1x_bo *
272 host1x_bo_lookup(struct drm_file *file, u32 handle)
273 {
274 	struct drm_gem_object *gem;
275 	struct tegra_bo *bo;
276 
277 	gem = drm_gem_object_lookup(file, handle);
278 	if (!gem)
279 		return NULL;
280 
281 	drm_gem_object_unreference_unlocked(gem);
282 
283 	bo = to_tegra_bo(gem);
284 	return &bo->base;
285 }
286 
287 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
288 				       struct drm_tegra_reloc __user *src,
289 				       struct drm_device *drm,
290 				       struct drm_file *file)
291 {
292 	u32 cmdbuf, target;
293 	int err;
294 
295 	err = get_user(cmdbuf, &src->cmdbuf.handle);
296 	if (err < 0)
297 		return err;
298 
299 	err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
300 	if (err < 0)
301 		return err;
302 
303 	err = get_user(target, &src->target.handle);
304 	if (err < 0)
305 		return err;
306 
307 	err = get_user(dest->target.offset, &src->target.offset);
308 	if (err < 0)
309 		return err;
310 
311 	err = get_user(dest->shift, &src->shift);
312 	if (err < 0)
313 		return err;
314 
315 	dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf);
316 	if (!dest->cmdbuf.bo)
317 		return -ENOENT;
318 
319 	dest->target.bo = host1x_bo_lookup(file, target);
320 	if (!dest->target.bo)
321 		return -ENOENT;
322 
323 	return 0;
324 }
325 
326 int tegra_drm_submit(struct tegra_drm_context *context,
327 		     struct drm_tegra_submit *args, struct drm_device *drm,
328 		     struct drm_file *file)
329 {
330 	unsigned int num_cmdbufs = args->num_cmdbufs;
331 	unsigned int num_relocs = args->num_relocs;
332 	unsigned int num_waitchks = args->num_waitchks;
333 	struct drm_tegra_cmdbuf __user *cmdbufs =
334 		(void __user *)(uintptr_t)args->cmdbufs;
335 	struct drm_tegra_reloc __user *relocs =
336 		(void __user *)(uintptr_t)args->relocs;
337 	struct drm_tegra_waitchk __user *waitchks =
338 		(void __user *)(uintptr_t)args->waitchks;
339 	struct drm_tegra_syncpt syncpt;
340 	struct host1x_job *job;
341 	int err;
342 
343 	/* We don't yet support other than one syncpt_incr struct per submit */
344 	if (args->num_syncpts != 1)
345 		return -EINVAL;
346 
347 	job = host1x_job_alloc(context->channel, args->num_cmdbufs,
348 			       args->num_relocs, args->num_waitchks);
349 	if (!job)
350 		return -ENOMEM;
351 
352 	job->num_relocs = args->num_relocs;
353 	job->num_waitchk = args->num_waitchks;
354 	job->client = (u32)args->context;
355 	job->class = context->client->base.class;
356 	job->serialize = true;
357 
358 	while (num_cmdbufs) {
359 		struct drm_tegra_cmdbuf cmdbuf;
360 		struct host1x_bo *bo;
361 
362 		if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
363 			err = -EFAULT;
364 			goto fail;
365 		}
366 
367 		bo = host1x_bo_lookup(file, cmdbuf.handle);
368 		if (!bo) {
369 			err = -ENOENT;
370 			goto fail;
371 		}
372 
373 		host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
374 		num_cmdbufs--;
375 		cmdbufs++;
376 	}
377 
378 	/* copy and resolve relocations from submit */
379 	while (num_relocs--) {
380 		err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
381 						  &relocs[num_relocs], drm,
382 						  file);
383 		if (err < 0)
384 			goto fail;
385 	}
386 
387 	if (copy_from_user(job->waitchk, waitchks,
388 			   sizeof(*waitchks) * num_waitchks)) {
389 		err = -EFAULT;
390 		goto fail;
391 	}
392 
393 	if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
394 			   sizeof(syncpt))) {
395 		err = -EFAULT;
396 		goto fail;
397 	}
398 
399 	job->is_addr_reg = context->client->ops->is_addr_reg;
400 	job->syncpt_incrs = syncpt.incrs;
401 	job->syncpt_id = syncpt.id;
402 	job->timeout = 10000;
403 
404 	if (args->timeout && args->timeout < 10000)
405 		job->timeout = args->timeout;
406 
407 	err = host1x_job_pin(job, context->client->base.dev);
408 	if (err)
409 		goto fail;
410 
411 	err = host1x_job_submit(job);
412 	if (err)
413 		goto fail_submit;
414 
415 	args->fence = job->syncpt_end;
416 
417 	host1x_job_put(job);
418 	return 0;
419 
420 fail_submit:
421 	host1x_job_unpin(job);
422 fail:
423 	host1x_job_put(job);
424 	return err;
425 }
426 
427 
428 #ifdef CONFIG_DRM_TEGRA_STAGING
429 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
430 {
431 	return (struct tegra_drm_context *)(uintptr_t)context;
432 }
433 
434 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
435 					struct tegra_drm_context *context)
436 {
437 	struct tegra_drm_context *ctx;
438 
439 	list_for_each_entry(ctx, &file->contexts, list)
440 		if (ctx == context)
441 			return true;
442 
443 	return false;
444 }
445 
446 static int tegra_gem_create(struct drm_device *drm, void *data,
447 			    struct drm_file *file)
448 {
449 	struct drm_tegra_gem_create *args = data;
450 	struct tegra_bo *bo;
451 
452 	bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
453 					 &args->handle);
454 	if (IS_ERR(bo))
455 		return PTR_ERR(bo);
456 
457 	return 0;
458 }
459 
460 static int tegra_gem_mmap(struct drm_device *drm, void *data,
461 			  struct drm_file *file)
462 {
463 	struct drm_tegra_gem_mmap *args = data;
464 	struct drm_gem_object *gem;
465 	struct tegra_bo *bo;
466 
467 	gem = drm_gem_object_lookup(file, args->handle);
468 	if (!gem)
469 		return -EINVAL;
470 
471 	bo = to_tegra_bo(gem);
472 
473 	args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
474 
475 	drm_gem_object_unreference_unlocked(gem);
476 
477 	return 0;
478 }
479 
480 static int tegra_syncpt_read(struct drm_device *drm, void *data,
481 			     struct drm_file *file)
482 {
483 	struct host1x *host = dev_get_drvdata(drm->dev->parent);
484 	struct drm_tegra_syncpt_read *args = data;
485 	struct host1x_syncpt *sp;
486 
487 	sp = host1x_syncpt_get(host, args->id);
488 	if (!sp)
489 		return -EINVAL;
490 
491 	args->value = host1x_syncpt_read_min(sp);
492 	return 0;
493 }
494 
495 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
496 			     struct drm_file *file)
497 {
498 	struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
499 	struct drm_tegra_syncpt_incr *args = data;
500 	struct host1x_syncpt *sp;
501 
502 	sp = host1x_syncpt_get(host1x, args->id);
503 	if (!sp)
504 		return -EINVAL;
505 
506 	return host1x_syncpt_incr(sp);
507 }
508 
509 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
510 			     struct drm_file *file)
511 {
512 	struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
513 	struct drm_tegra_syncpt_wait *args = data;
514 	struct host1x_syncpt *sp;
515 
516 	sp = host1x_syncpt_get(host1x, args->id);
517 	if (!sp)
518 		return -EINVAL;
519 
520 	return host1x_syncpt_wait(sp, args->thresh, args->timeout,
521 				  &args->value);
522 }
523 
524 static int tegra_open_channel(struct drm_device *drm, void *data,
525 			      struct drm_file *file)
526 {
527 	struct tegra_drm_file *fpriv = file->driver_priv;
528 	struct tegra_drm *tegra = drm->dev_private;
529 	struct drm_tegra_open_channel *args = data;
530 	struct tegra_drm_context *context;
531 	struct tegra_drm_client *client;
532 	int err = -ENODEV;
533 
534 	context = kzalloc(sizeof(*context), GFP_KERNEL);
535 	if (!context)
536 		return -ENOMEM;
537 
538 	list_for_each_entry(client, &tegra->clients, list)
539 		if (client->base.class == args->client) {
540 			err = client->ops->open_channel(client, context);
541 			if (err)
542 				break;
543 
544 			list_add(&context->list, &fpriv->contexts);
545 			args->context = (uintptr_t)context;
546 			context->client = client;
547 			return 0;
548 		}
549 
550 	kfree(context);
551 	return err;
552 }
553 
554 static int tegra_close_channel(struct drm_device *drm, void *data,
555 			       struct drm_file *file)
556 {
557 	struct tegra_drm_file *fpriv = file->driver_priv;
558 	struct drm_tegra_close_channel *args = data;
559 	struct tegra_drm_context *context;
560 
561 	context = tegra_drm_get_context(args->context);
562 
563 	if (!tegra_drm_file_owns_context(fpriv, context))
564 		return -EINVAL;
565 
566 	list_del(&context->list);
567 	tegra_drm_context_free(context);
568 
569 	return 0;
570 }
571 
572 static int tegra_get_syncpt(struct drm_device *drm, void *data,
573 			    struct drm_file *file)
574 {
575 	struct tegra_drm_file *fpriv = file->driver_priv;
576 	struct drm_tegra_get_syncpt *args = data;
577 	struct tegra_drm_context *context;
578 	struct host1x_syncpt *syncpt;
579 
580 	context = tegra_drm_get_context(args->context);
581 
582 	if (!tegra_drm_file_owns_context(fpriv, context))
583 		return -ENODEV;
584 
585 	if (args->index >= context->client->base.num_syncpts)
586 		return -EINVAL;
587 
588 	syncpt = context->client->base.syncpts[args->index];
589 	args->id = host1x_syncpt_id(syncpt);
590 
591 	return 0;
592 }
593 
594 static int tegra_submit(struct drm_device *drm, void *data,
595 			struct drm_file *file)
596 {
597 	struct tegra_drm_file *fpriv = file->driver_priv;
598 	struct drm_tegra_submit *args = data;
599 	struct tegra_drm_context *context;
600 
601 	context = tegra_drm_get_context(args->context);
602 
603 	if (!tegra_drm_file_owns_context(fpriv, context))
604 		return -ENODEV;
605 
606 	return context->client->ops->submit(context, args, drm, file);
607 }
608 
609 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
610 				 struct drm_file *file)
611 {
612 	struct tegra_drm_file *fpriv = file->driver_priv;
613 	struct drm_tegra_get_syncpt_base *args = data;
614 	struct tegra_drm_context *context;
615 	struct host1x_syncpt_base *base;
616 	struct host1x_syncpt *syncpt;
617 
618 	context = tegra_drm_get_context(args->context);
619 
620 	if (!tegra_drm_file_owns_context(fpriv, context))
621 		return -ENODEV;
622 
623 	if (args->syncpt >= context->client->base.num_syncpts)
624 		return -EINVAL;
625 
626 	syncpt = context->client->base.syncpts[args->syncpt];
627 
628 	base = host1x_syncpt_get_base(syncpt);
629 	if (!base)
630 		return -ENXIO;
631 
632 	args->id = host1x_syncpt_base_id(base);
633 
634 	return 0;
635 }
636 
637 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
638 				struct drm_file *file)
639 {
640 	struct drm_tegra_gem_set_tiling *args = data;
641 	enum tegra_bo_tiling_mode mode;
642 	struct drm_gem_object *gem;
643 	unsigned long value = 0;
644 	struct tegra_bo *bo;
645 
646 	switch (args->mode) {
647 	case DRM_TEGRA_GEM_TILING_MODE_PITCH:
648 		mode = TEGRA_BO_TILING_MODE_PITCH;
649 
650 		if (args->value != 0)
651 			return -EINVAL;
652 
653 		break;
654 
655 	case DRM_TEGRA_GEM_TILING_MODE_TILED:
656 		mode = TEGRA_BO_TILING_MODE_TILED;
657 
658 		if (args->value != 0)
659 			return -EINVAL;
660 
661 		break;
662 
663 	case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
664 		mode = TEGRA_BO_TILING_MODE_BLOCK;
665 
666 		if (args->value > 5)
667 			return -EINVAL;
668 
669 		value = args->value;
670 		break;
671 
672 	default:
673 		return -EINVAL;
674 	}
675 
676 	gem = drm_gem_object_lookup(file, args->handle);
677 	if (!gem)
678 		return -ENOENT;
679 
680 	bo = to_tegra_bo(gem);
681 
682 	bo->tiling.mode = mode;
683 	bo->tiling.value = value;
684 
685 	drm_gem_object_unreference_unlocked(gem);
686 
687 	return 0;
688 }
689 
690 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
691 				struct drm_file *file)
692 {
693 	struct drm_tegra_gem_get_tiling *args = data;
694 	struct drm_gem_object *gem;
695 	struct tegra_bo *bo;
696 	int err = 0;
697 
698 	gem = drm_gem_object_lookup(file, args->handle);
699 	if (!gem)
700 		return -ENOENT;
701 
702 	bo = to_tegra_bo(gem);
703 
704 	switch (bo->tiling.mode) {
705 	case TEGRA_BO_TILING_MODE_PITCH:
706 		args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
707 		args->value = 0;
708 		break;
709 
710 	case TEGRA_BO_TILING_MODE_TILED:
711 		args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
712 		args->value = 0;
713 		break;
714 
715 	case TEGRA_BO_TILING_MODE_BLOCK:
716 		args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
717 		args->value = bo->tiling.value;
718 		break;
719 
720 	default:
721 		err = -EINVAL;
722 		break;
723 	}
724 
725 	drm_gem_object_unreference_unlocked(gem);
726 
727 	return err;
728 }
729 
730 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
731 			       struct drm_file *file)
732 {
733 	struct drm_tegra_gem_set_flags *args = data;
734 	struct drm_gem_object *gem;
735 	struct tegra_bo *bo;
736 
737 	if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
738 		return -EINVAL;
739 
740 	gem = drm_gem_object_lookup(file, args->handle);
741 	if (!gem)
742 		return -ENOENT;
743 
744 	bo = to_tegra_bo(gem);
745 	bo->flags = 0;
746 
747 	if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
748 		bo->flags |= TEGRA_BO_BOTTOM_UP;
749 
750 	drm_gem_object_unreference_unlocked(gem);
751 
752 	return 0;
753 }
754 
755 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
756 			       struct drm_file *file)
757 {
758 	struct drm_tegra_gem_get_flags *args = data;
759 	struct drm_gem_object *gem;
760 	struct tegra_bo *bo;
761 
762 	gem = drm_gem_object_lookup(file, args->handle);
763 	if (!gem)
764 		return -ENOENT;
765 
766 	bo = to_tegra_bo(gem);
767 	args->flags = 0;
768 
769 	if (bo->flags & TEGRA_BO_BOTTOM_UP)
770 		args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
771 
772 	drm_gem_object_unreference_unlocked(gem);
773 
774 	return 0;
775 }
776 #endif
777 
778 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
779 #ifdef CONFIG_DRM_TEGRA_STAGING
780 	DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, 0),
781 	DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, 0),
782 	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, 0),
783 	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, 0),
784 	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, 0),
785 	DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, 0),
786 	DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, 0),
787 	DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, 0),
788 	DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, 0),
789 	DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, 0),
790 	DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, 0),
791 	DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, 0),
792 	DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, 0),
793 	DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, 0),
794 #endif
795 };
796 
797 static const struct file_operations tegra_drm_fops = {
798 	.owner = THIS_MODULE,
799 	.open = drm_open,
800 	.release = drm_release,
801 	.unlocked_ioctl = drm_ioctl,
802 	.mmap = tegra_drm_mmap,
803 	.poll = drm_poll,
804 	.read = drm_read,
805 	.compat_ioctl = drm_compat_ioctl,
806 	.llseek = noop_llseek,
807 };
808 
809 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
810 					     unsigned int pipe)
811 {
812 	struct drm_crtc *crtc;
813 
814 	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
815 		if (pipe == drm_crtc_index(crtc))
816 			return crtc;
817 	}
818 
819 	return NULL;
820 }
821 
822 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm,
823 					unsigned int pipe)
824 {
825 	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
826 	struct tegra_dc *dc = to_tegra_dc(crtc);
827 
828 	if (!crtc)
829 		return 0;
830 
831 	return tegra_dc_get_vblank_counter(dc);
832 }
833 
834 static int tegra_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
835 {
836 	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
837 	struct tegra_dc *dc = to_tegra_dc(crtc);
838 
839 	if (!crtc)
840 		return -ENODEV;
841 
842 	tegra_dc_enable_vblank(dc);
843 
844 	return 0;
845 }
846 
847 static void tegra_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
848 {
849 	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
850 	struct tegra_dc *dc = to_tegra_dc(crtc);
851 
852 	if (crtc)
853 		tegra_dc_disable_vblank(dc);
854 }
855 
856 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
857 {
858 	struct tegra_drm_file *fpriv = file->driver_priv;
859 	struct tegra_drm_context *context, *tmp;
860 
861 	list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
862 		tegra_drm_context_free(context);
863 
864 	kfree(fpriv);
865 }
866 
867 #ifdef CONFIG_DEBUG_FS
868 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
869 {
870 	struct drm_info_node *node = (struct drm_info_node *)s->private;
871 	struct drm_device *drm = node->minor->dev;
872 	struct drm_framebuffer *fb;
873 
874 	mutex_lock(&drm->mode_config.fb_lock);
875 
876 	list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
877 		seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
878 			   fb->base.id, fb->width, fb->height, fb->depth,
879 			   fb->bits_per_pixel,
880 			   drm_framebuffer_read_refcount(fb));
881 	}
882 
883 	mutex_unlock(&drm->mode_config.fb_lock);
884 
885 	return 0;
886 }
887 
888 static int tegra_debugfs_iova(struct seq_file *s, void *data)
889 {
890 	struct drm_info_node *node = (struct drm_info_node *)s->private;
891 	struct drm_device *drm = node->minor->dev;
892 	struct tegra_drm *tegra = drm->dev_private;
893 
894 	return drm_mm_dump_table(s, &tegra->mm);
895 }
896 
897 static struct drm_info_list tegra_debugfs_list[] = {
898 	{ "framebuffers", tegra_debugfs_framebuffers, 0 },
899 	{ "iova", tegra_debugfs_iova, 0 },
900 };
901 
902 static int tegra_debugfs_init(struct drm_minor *minor)
903 {
904 	return drm_debugfs_create_files(tegra_debugfs_list,
905 					ARRAY_SIZE(tegra_debugfs_list),
906 					minor->debugfs_root, minor);
907 }
908 
909 static void tegra_debugfs_cleanup(struct drm_minor *minor)
910 {
911 	drm_debugfs_remove_files(tegra_debugfs_list,
912 				 ARRAY_SIZE(tegra_debugfs_list), minor);
913 }
914 #endif
915 
916 static struct drm_driver tegra_drm_driver = {
917 	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
918 			   DRIVER_ATOMIC,
919 	.load = tegra_drm_load,
920 	.unload = tegra_drm_unload,
921 	.open = tegra_drm_open,
922 	.preclose = tegra_drm_preclose,
923 	.lastclose = tegra_drm_lastclose,
924 
925 	.get_vblank_counter = tegra_drm_get_vblank_counter,
926 	.enable_vblank = tegra_drm_enable_vblank,
927 	.disable_vblank = tegra_drm_disable_vblank,
928 
929 #if defined(CONFIG_DEBUG_FS)
930 	.debugfs_init = tegra_debugfs_init,
931 	.debugfs_cleanup = tegra_debugfs_cleanup,
932 #endif
933 
934 	.gem_free_object_unlocked = tegra_bo_free_object,
935 	.gem_vm_ops = &tegra_bo_vm_ops,
936 
937 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
938 	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
939 	.gem_prime_export = tegra_gem_prime_export,
940 	.gem_prime_import = tegra_gem_prime_import,
941 
942 	.dumb_create = tegra_bo_dumb_create,
943 	.dumb_map_offset = tegra_bo_dumb_map_offset,
944 	.dumb_destroy = drm_gem_dumb_destroy,
945 
946 	.ioctls = tegra_drm_ioctls,
947 	.num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
948 	.fops = &tegra_drm_fops,
949 
950 	.name = DRIVER_NAME,
951 	.desc = DRIVER_DESC,
952 	.date = DRIVER_DATE,
953 	.major = DRIVER_MAJOR,
954 	.minor = DRIVER_MINOR,
955 	.patchlevel = DRIVER_PATCHLEVEL,
956 };
957 
958 int tegra_drm_register_client(struct tegra_drm *tegra,
959 			      struct tegra_drm_client *client)
960 {
961 	mutex_lock(&tegra->clients_lock);
962 	list_add_tail(&client->list, &tegra->clients);
963 	mutex_unlock(&tegra->clients_lock);
964 
965 	return 0;
966 }
967 
968 int tegra_drm_unregister_client(struct tegra_drm *tegra,
969 				struct tegra_drm_client *client)
970 {
971 	mutex_lock(&tegra->clients_lock);
972 	list_del_init(&client->list);
973 	mutex_unlock(&tegra->clients_lock);
974 
975 	return 0;
976 }
977 
978 static int host1x_drm_probe(struct host1x_device *dev)
979 {
980 	struct drm_driver *driver = &tegra_drm_driver;
981 	struct drm_device *drm;
982 	int err;
983 
984 	drm = drm_dev_alloc(driver, &dev->dev);
985 	if (IS_ERR(drm))
986 		return PTR_ERR(drm);
987 
988 	dev_set_drvdata(&dev->dev, drm);
989 
990 	err = drm_dev_register(drm, 0);
991 	if (err < 0)
992 		goto unref;
993 
994 	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
995 		 driver->major, driver->minor, driver->patchlevel,
996 		 driver->date, drm->primary->index);
997 
998 	return 0;
999 
1000 unref:
1001 	drm_dev_unref(drm);
1002 	return err;
1003 }
1004 
1005 static int host1x_drm_remove(struct host1x_device *dev)
1006 {
1007 	struct drm_device *drm = dev_get_drvdata(&dev->dev);
1008 
1009 	drm_dev_unregister(drm);
1010 	drm_dev_unref(drm);
1011 
1012 	return 0;
1013 }
1014 
1015 #ifdef CONFIG_PM_SLEEP
1016 static int host1x_drm_suspend(struct device *dev)
1017 {
1018 	struct drm_device *drm = dev_get_drvdata(dev);
1019 	struct tegra_drm *tegra = drm->dev_private;
1020 
1021 	drm_kms_helper_poll_disable(drm);
1022 	tegra_drm_fb_suspend(drm);
1023 
1024 	tegra->state = drm_atomic_helper_suspend(drm);
1025 	if (IS_ERR(tegra->state)) {
1026 		tegra_drm_fb_resume(drm);
1027 		drm_kms_helper_poll_enable(drm);
1028 		return PTR_ERR(tegra->state);
1029 	}
1030 
1031 	return 0;
1032 }
1033 
1034 static int host1x_drm_resume(struct device *dev)
1035 {
1036 	struct drm_device *drm = dev_get_drvdata(dev);
1037 	struct tegra_drm *tegra = drm->dev_private;
1038 
1039 	drm_atomic_helper_resume(drm, tegra->state);
1040 	tegra_drm_fb_resume(drm);
1041 	drm_kms_helper_poll_enable(drm);
1042 
1043 	return 0;
1044 }
1045 #endif
1046 
1047 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1048 			 host1x_drm_resume);
1049 
1050 static const struct of_device_id host1x_drm_subdevs[] = {
1051 	{ .compatible = "nvidia,tegra20-dc", },
1052 	{ .compatible = "nvidia,tegra20-hdmi", },
1053 	{ .compatible = "nvidia,tegra20-gr2d", },
1054 	{ .compatible = "nvidia,tegra20-gr3d", },
1055 	{ .compatible = "nvidia,tegra30-dc", },
1056 	{ .compatible = "nvidia,tegra30-hdmi", },
1057 	{ .compatible = "nvidia,tegra30-gr2d", },
1058 	{ .compatible = "nvidia,tegra30-gr3d", },
1059 	{ .compatible = "nvidia,tegra114-dsi", },
1060 	{ .compatible = "nvidia,tegra114-hdmi", },
1061 	{ .compatible = "nvidia,tegra114-gr3d", },
1062 	{ .compatible = "nvidia,tegra124-dc", },
1063 	{ .compatible = "nvidia,tegra124-sor", },
1064 	{ .compatible = "nvidia,tegra124-hdmi", },
1065 	{ .compatible = "nvidia,tegra124-dsi", },
1066 	{ .compatible = "nvidia,tegra132-dsi", },
1067 	{ .compatible = "nvidia,tegra210-dc", },
1068 	{ .compatible = "nvidia,tegra210-dsi", },
1069 	{ .compatible = "nvidia,tegra210-sor", },
1070 	{ .compatible = "nvidia,tegra210-sor1", },
1071 	{ /* sentinel */ }
1072 };
1073 
1074 static struct host1x_driver host1x_drm_driver = {
1075 	.driver = {
1076 		.name = "drm",
1077 		.pm = &host1x_drm_pm_ops,
1078 	},
1079 	.probe = host1x_drm_probe,
1080 	.remove = host1x_drm_remove,
1081 	.subdevs = host1x_drm_subdevs,
1082 };
1083 
1084 static struct platform_driver * const drivers[] = {
1085 	&tegra_dc_driver,
1086 	&tegra_hdmi_driver,
1087 	&tegra_dsi_driver,
1088 	&tegra_dpaux_driver,
1089 	&tegra_sor_driver,
1090 	&tegra_gr2d_driver,
1091 	&tegra_gr3d_driver,
1092 };
1093 
1094 static int __init host1x_drm_init(void)
1095 {
1096 	int err;
1097 
1098 	err = host1x_driver_register(&host1x_drm_driver);
1099 	if (err < 0)
1100 		return err;
1101 
1102 	err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1103 	if (err < 0)
1104 		goto unregister_host1x;
1105 
1106 	return 0;
1107 
1108 unregister_host1x:
1109 	host1x_driver_unregister(&host1x_drm_driver);
1110 	return err;
1111 }
1112 module_init(host1x_drm_init);
1113 
1114 static void __exit host1x_drm_exit(void)
1115 {
1116 	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1117 	host1x_driver_unregister(&host1x_drm_driver);
1118 }
1119 module_exit(host1x_drm_exit);
1120 
1121 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1122 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1123 MODULE_LICENSE("GPL v2");
1124