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1/*
2 * Copyright (C) 2012 Avionic Design GmbH
3 * Copyright (C) 2012-2013 NVIDIA CORPORATION. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10#include <linux/host1x.h>
11#include <linux/iommu.h>
12
13#include <drm/drm_atomic.h>
14#include <drm/drm_atomic_helper.h>
15
16#include "drm.h"
17#include "gem.h"
18
19#define DRIVER_NAME "tegra"
20#define DRIVER_DESC "NVIDIA Tegra graphics"
21#define DRIVER_DATE "20120330"
22#define DRIVER_MAJOR 0
23#define DRIVER_MINOR 0
24#define DRIVER_PATCHLEVEL 0
25
26struct tegra_drm_file {
27 struct list_head contexts;
28};
29
30static void tegra_atomic_schedule(struct tegra_drm *tegra,
31 struct drm_atomic_state *state)
32{
33 tegra->commit.state = state;
34 schedule_work(&tegra->commit.work);
35}
36
37static void tegra_atomic_complete(struct tegra_drm *tegra,
38 struct drm_atomic_state *state)
39{
40 struct drm_device *drm = tegra->drm;
41
42 /*
43 * Everything below can be run asynchronously without the need to grab
44 * any modeset locks at all under one condition: It must be guaranteed
45 * that the asynchronous work has either been cancelled (if the driver
46 * supports it, which at least requires that the framebuffers get
47 * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
48 * before the new state gets committed on the software side with
49 * drm_atomic_helper_swap_state().
50 *
51 * This scheme allows new atomic state updates to be prepared and
52 * checked in parallel to the asynchronous completion of the previous
53 * update. Which is important since compositors need to figure out the
54 * composition of the next frame right after having submitted the
55 * current layout.
56 */
57
58 drm_atomic_helper_commit_modeset_disables(drm, state);
59 drm_atomic_helper_commit_planes(drm, state, 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");
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#define CDMA_GATHER_FETCHES_MAX_NB 16383
30
31struct tegra_drm_file {
32 struct idr contexts;
33 struct mutex lock;
34};
35
36static int tegra_atomic_check(struct drm_device *drm,
37 struct drm_atomic_state *state)
38{
39 int err;
40
41 err = drm_atomic_helper_check_modeset(drm, state);
42 if (err < 0)
43 return err;
44
45 err = tegra_display_hub_atomic_check(drm, state);
46 if (err < 0)
47 return err;
48
49 err = drm_atomic_normalize_zpos(drm, state);
50 if (err < 0)
51 return err;
52
53 err = drm_atomic_helper_check_planes(drm, state);
54 if (err < 0)
55 return err;
56
57 if (state->legacy_cursor_update)
58 state->async_update = !drm_atomic_helper_async_check(drm, state);
59
60 return 0;
61}
62
63static const struct drm_mode_config_funcs tegra_drm_mode_config_funcs = {
64 .fb_create = tegra_fb_create,
65#ifdef CONFIG_DRM_FBDEV_EMULATION
66 .output_poll_changed = drm_fb_helper_output_poll_changed,
67#endif
68 .atomic_check = tegra_atomic_check,
69 .atomic_commit = drm_atomic_helper_commit,
70};
71
72static void tegra_atomic_commit_tail(struct drm_atomic_state *old_state)
73{
74 struct drm_device *drm = old_state->dev;
75 struct tegra_drm *tegra = drm->dev_private;
76
77 if (tegra->hub) {
78 drm_atomic_helper_commit_modeset_disables(drm, old_state);
79 tegra_display_hub_atomic_commit(drm, old_state);
80 drm_atomic_helper_commit_planes(drm, old_state, 0);
81 drm_atomic_helper_commit_modeset_enables(drm, old_state);
82 drm_atomic_helper_commit_hw_done(old_state);
83 drm_atomic_helper_wait_for_vblanks(drm, old_state);
84 drm_atomic_helper_cleanup_planes(drm, old_state);
85 } else {
86 drm_atomic_helper_commit_tail_rpm(old_state);
87 }
88}
89
90static const struct drm_mode_config_helper_funcs
91tegra_drm_mode_config_helpers = {
92 .atomic_commit_tail = tegra_atomic_commit_tail,
93};
94
95static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
96{
97 struct host1x_device *device = to_host1x_device(drm->dev);
98 struct tegra_drm *tegra;
99 int err;
100
101 tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
102 if (!tegra)
103 return -ENOMEM;
104
105 if (iommu_present(&platform_bus_type)) {
106 u64 carveout_start, carveout_end, gem_start, gem_end;
107 struct iommu_domain_geometry *geometry;
108 unsigned long order;
109
110 tegra->domain = iommu_domain_alloc(&platform_bus_type);
111 if (!tegra->domain) {
112 err = -ENOMEM;
113 goto free;
114 }
115
116 geometry = &tegra->domain->geometry;
117 gem_start = geometry->aperture_start;
118 gem_end = geometry->aperture_end - CARVEOUT_SZ;
119 carveout_start = gem_end + 1;
120 carveout_end = geometry->aperture_end;
121
122 order = __ffs(tegra->domain->pgsize_bitmap);
123 init_iova_domain(&tegra->carveout.domain, 1UL << order,
124 carveout_start >> order);
125
126 tegra->carveout.shift = iova_shift(&tegra->carveout.domain);
127 tegra->carveout.limit = carveout_end >> tegra->carveout.shift;
128
129 drm_mm_init(&tegra->mm, gem_start, gem_end - gem_start + 1);
130 mutex_init(&tegra->mm_lock);
131
132 DRM_DEBUG("IOMMU apertures:\n");
133 DRM_DEBUG(" GEM: %#llx-%#llx\n", gem_start, gem_end);
134 DRM_DEBUG(" Carveout: %#llx-%#llx\n", carveout_start,
135 carveout_end);
136 }
137
138 mutex_init(&tegra->clients_lock);
139 INIT_LIST_HEAD(&tegra->clients);
140
141 drm->dev_private = tegra;
142 tegra->drm = drm;
143
144 drm_mode_config_init(drm);
145
146 drm->mode_config.min_width = 0;
147 drm->mode_config.min_height = 0;
148
149 drm->mode_config.max_width = 4096;
150 drm->mode_config.max_height = 4096;
151
152 drm->mode_config.allow_fb_modifiers = true;
153
154 drm->mode_config.funcs = &tegra_drm_mode_config_funcs;
155 drm->mode_config.helper_private = &tegra_drm_mode_config_helpers;
156
157 err = tegra_drm_fb_prepare(drm);
158 if (err < 0)
159 goto config;
160
161 drm_kms_helper_poll_init(drm);
162
163 err = host1x_device_init(device);
164 if (err < 0)
165 goto fbdev;
166
167 if (tegra->hub) {
168 err = tegra_display_hub_prepare(tegra->hub);
169 if (err < 0)
170 goto device;
171 }
172
173 /*
174 * We don't use the drm_irq_install() helpers provided by the DRM
175 * core, so we need to set this manually in order to allow the
176 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
177 */
178 drm->irq_enabled = true;
179
180 /* syncpoints are used for full 32-bit hardware VBLANK counters */
181 drm->max_vblank_count = 0xffffffff;
182
183 err = drm_vblank_init(drm, drm->mode_config.num_crtc);
184 if (err < 0)
185 goto hub;
186
187 drm_mode_config_reset(drm);
188
189 err = tegra_drm_fb_init(drm);
190 if (err < 0)
191 goto hub;
192
193 return 0;
194
195hub:
196 if (tegra->hub)
197 tegra_display_hub_cleanup(tegra->hub);
198device:
199 host1x_device_exit(device);
200fbdev:
201 drm_kms_helper_poll_fini(drm);
202 tegra_drm_fb_free(drm);
203config:
204 drm_mode_config_cleanup(drm);
205
206 if (tegra->domain) {
207 iommu_domain_free(tegra->domain);
208 drm_mm_takedown(&tegra->mm);
209 mutex_destroy(&tegra->mm_lock);
210 put_iova_domain(&tegra->carveout.domain);
211 }
212free:
213 kfree(tegra);
214 return err;
215}
216
217static void 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_atomic_helper_shutdown(drm);
226 drm_mode_config_cleanup(drm);
227
228 err = host1x_device_exit(device);
229 if (err < 0)
230 return;
231
232 if (tegra->domain) {
233 iommu_domain_free(tegra->domain);
234 drm_mm_takedown(&tegra->mm);
235 mutex_destroy(&tegra->mm_lock);
236 put_iova_domain(&tegra->carveout.domain);
237 }
238
239 kfree(tegra);
240}
241
242static 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 idr_init(&fpriv->contexts);
251 mutex_init(&fpriv->lock);
252 filp->driver_priv = fpriv;
253
254 return 0;
255}
256
257static void tegra_drm_context_free(struct tegra_drm_context *context)
258{
259 context->client->ops->close_channel(context);
260 kfree(context);
261}
262
263static struct host1x_bo *
264host1x_bo_lookup(struct drm_file *file, u32 handle)
265{
266 struct drm_gem_object *gem;
267 struct tegra_bo *bo;
268
269 gem = drm_gem_object_lookup(file, handle);
270 if (!gem)
271 return NULL;
272
273 bo = to_tegra_bo(gem);
274 return &bo->base;
275}
276
277static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
278 struct drm_tegra_reloc __user *src,
279 struct drm_device *drm,
280 struct drm_file *file)
281{
282 u32 cmdbuf, target;
283 int err;
284
285 err = get_user(cmdbuf, &src->cmdbuf.handle);
286 if (err < 0)
287 return err;
288
289 err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
290 if (err < 0)
291 return err;
292
293 err = get_user(target, &src->target.handle);
294 if (err < 0)
295 return err;
296
297 err = get_user(dest->target.offset, &src->target.offset);
298 if (err < 0)
299 return err;
300
301 err = get_user(dest->shift, &src->shift);
302 if (err < 0)
303 return err;
304
305 dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf);
306 if (!dest->cmdbuf.bo)
307 return -ENOENT;
308
309 dest->target.bo = host1x_bo_lookup(file, target);
310 if (!dest->target.bo)
311 return -ENOENT;
312
313 return 0;
314}
315
316static int host1x_waitchk_copy_from_user(struct host1x_waitchk *dest,
317 struct drm_tegra_waitchk __user *src,
318 struct drm_file *file)
319{
320 u32 cmdbuf;
321 int err;
322
323 err = get_user(cmdbuf, &src->handle);
324 if (err < 0)
325 return err;
326
327 err = get_user(dest->offset, &src->offset);
328 if (err < 0)
329 return err;
330
331 err = get_user(dest->syncpt_id, &src->syncpt);
332 if (err < 0)
333 return err;
334
335 err = get_user(dest->thresh, &src->thresh);
336 if (err < 0)
337 return err;
338
339 dest->bo = host1x_bo_lookup(file, cmdbuf);
340 if (!dest->bo)
341 return -ENOENT;
342
343 return 0;
344}
345
346int tegra_drm_submit(struct tegra_drm_context *context,
347 struct drm_tegra_submit *args, struct drm_device *drm,
348 struct drm_file *file)
349{
350 unsigned int num_cmdbufs = args->num_cmdbufs;
351 unsigned int num_relocs = args->num_relocs;
352 unsigned int num_waitchks = args->num_waitchks;
353 struct drm_tegra_cmdbuf __user *user_cmdbufs;
354 struct drm_tegra_reloc __user *user_relocs;
355 struct drm_tegra_waitchk __user *user_waitchks;
356 struct drm_tegra_syncpt __user *user_syncpt;
357 struct drm_tegra_syncpt syncpt;
358 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
359 struct drm_gem_object **refs;
360 struct host1x_syncpt *sp;
361 struct host1x_job *job;
362 unsigned int num_refs;
363 int err;
364
365 user_cmdbufs = u64_to_user_ptr(args->cmdbufs);
366 user_relocs = u64_to_user_ptr(args->relocs);
367 user_waitchks = u64_to_user_ptr(args->waitchks);
368 user_syncpt = u64_to_user_ptr(args->syncpts);
369
370 /* We don't yet support other than one syncpt_incr struct per submit */
371 if (args->num_syncpts != 1)
372 return -EINVAL;
373
374 /* We don't yet support waitchks */
375 if (args->num_waitchks != 0)
376 return -EINVAL;
377
378 job = host1x_job_alloc(context->channel, args->num_cmdbufs,
379 args->num_relocs, args->num_waitchks);
380 if (!job)
381 return -ENOMEM;
382
383 job->num_relocs = args->num_relocs;
384 job->num_waitchk = args->num_waitchks;
385 job->client = (u32)args->context;
386 job->class = context->client->base.class;
387 job->serialize = true;
388
389 /*
390 * Track referenced BOs so that they can be unreferenced after the
391 * submission is complete.
392 */
393 num_refs = num_cmdbufs + num_relocs * 2 + num_waitchks;
394
395 refs = kmalloc_array(num_refs, sizeof(*refs), GFP_KERNEL);
396 if (!refs) {
397 err = -ENOMEM;
398 goto put;
399 }
400
401 /* reuse as an iterator later */
402 num_refs = 0;
403
404 while (num_cmdbufs) {
405 struct drm_tegra_cmdbuf cmdbuf;
406 struct host1x_bo *bo;
407 struct tegra_bo *obj;
408 u64 offset;
409
410 if (copy_from_user(&cmdbuf, user_cmdbufs, sizeof(cmdbuf))) {
411 err = -EFAULT;
412 goto fail;
413 }
414
415 /*
416 * The maximum number of CDMA gather fetches is 16383, a higher
417 * value means the words count is malformed.
418 */
419 if (cmdbuf.words > CDMA_GATHER_FETCHES_MAX_NB) {
420 err = -EINVAL;
421 goto fail;
422 }
423
424 bo = host1x_bo_lookup(file, cmdbuf.handle);
425 if (!bo) {
426 err = -ENOENT;
427 goto fail;
428 }
429
430 offset = (u64)cmdbuf.offset + (u64)cmdbuf.words * sizeof(u32);
431 obj = host1x_to_tegra_bo(bo);
432 refs[num_refs++] = &obj->gem;
433
434 /*
435 * Gather buffer base address must be 4-bytes aligned,
436 * unaligned offset is malformed and cause commands stream
437 * corruption on the buffer address relocation.
438 */
439 if (offset & 3 || offset >= obj->gem.size) {
440 err = -EINVAL;
441 goto fail;
442 }
443
444 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
445 num_cmdbufs--;
446 user_cmdbufs++;
447 }
448
449 /* copy and resolve relocations from submit */
450 while (num_relocs--) {
451 struct host1x_reloc *reloc;
452 struct tegra_bo *obj;
453
454 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
455 &user_relocs[num_relocs], drm,
456 file);
457 if (err < 0)
458 goto fail;
459
460 reloc = &job->relocarray[num_relocs];
461 obj = host1x_to_tegra_bo(reloc->cmdbuf.bo);
462 refs[num_refs++] = &obj->gem;
463
464 /*
465 * The unaligned cmdbuf offset will cause an unaligned write
466 * during of the relocations patching, corrupting the commands
467 * stream.
468 */
469 if (reloc->cmdbuf.offset & 3 ||
470 reloc->cmdbuf.offset >= obj->gem.size) {
471 err = -EINVAL;
472 goto fail;
473 }
474
475 obj = host1x_to_tegra_bo(reloc->target.bo);
476 refs[num_refs++] = &obj->gem;
477
478 if (reloc->target.offset >= obj->gem.size) {
479 err = -EINVAL;
480 goto fail;
481 }
482 }
483
484 /* copy and resolve waitchks from submit */
485 while (num_waitchks--) {
486 struct host1x_waitchk *wait = &job->waitchk[num_waitchks];
487 struct tegra_bo *obj;
488
489 err = host1x_waitchk_copy_from_user(
490 wait, &user_waitchks[num_waitchks], file);
491 if (err < 0)
492 goto fail;
493
494 obj = host1x_to_tegra_bo(wait->bo);
495 refs[num_refs++] = &obj->gem;
496
497 /*
498 * The unaligned offset will cause an unaligned write during
499 * of the waitchks patching, corrupting the commands stream.
500 */
501 if (wait->offset & 3 ||
502 wait->offset >= obj->gem.size) {
503 err = -EINVAL;
504 goto fail;
505 }
506 }
507
508 if (copy_from_user(&syncpt, user_syncpt, sizeof(syncpt))) {
509 err = -EFAULT;
510 goto fail;
511 }
512
513 /* check whether syncpoint ID is valid */
514 sp = host1x_syncpt_get(host1x, syncpt.id);
515 if (!sp) {
516 err = -ENOENT;
517 goto fail;
518 }
519
520 job->is_addr_reg = context->client->ops->is_addr_reg;
521 job->is_valid_class = context->client->ops->is_valid_class;
522 job->syncpt_incrs = syncpt.incrs;
523 job->syncpt_id = syncpt.id;
524 job->timeout = 10000;
525
526 if (args->timeout && args->timeout < 10000)
527 job->timeout = args->timeout;
528
529 err = host1x_job_pin(job, context->client->base.dev);
530 if (err)
531 goto fail;
532
533 err = host1x_job_submit(job);
534 if (err) {
535 host1x_job_unpin(job);
536 goto fail;
537 }
538
539 args->fence = job->syncpt_end;
540
541fail:
542 while (num_refs--)
543 drm_gem_object_put_unlocked(refs[num_refs]);
544
545 kfree(refs);
546
547put:
548 host1x_job_put(job);
549 return err;
550}
551
552
553#ifdef CONFIG_DRM_TEGRA_STAGING
554static int tegra_gem_create(struct drm_device *drm, void *data,
555 struct drm_file *file)
556{
557 struct drm_tegra_gem_create *args = data;
558 struct tegra_bo *bo;
559
560 bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
561 &args->handle);
562 if (IS_ERR(bo))
563 return PTR_ERR(bo);
564
565 return 0;
566}
567
568static int tegra_gem_mmap(struct drm_device *drm, void *data,
569 struct drm_file *file)
570{
571 struct drm_tegra_gem_mmap *args = data;
572 struct drm_gem_object *gem;
573 struct tegra_bo *bo;
574
575 gem = drm_gem_object_lookup(file, args->handle);
576 if (!gem)
577 return -EINVAL;
578
579 bo = to_tegra_bo(gem);
580
581 args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
582
583 drm_gem_object_put_unlocked(gem);
584
585 return 0;
586}
587
588static int tegra_syncpt_read(struct drm_device *drm, void *data,
589 struct drm_file *file)
590{
591 struct host1x *host = dev_get_drvdata(drm->dev->parent);
592 struct drm_tegra_syncpt_read *args = data;
593 struct host1x_syncpt *sp;
594
595 sp = host1x_syncpt_get(host, args->id);
596 if (!sp)
597 return -EINVAL;
598
599 args->value = host1x_syncpt_read_min(sp);
600 return 0;
601}
602
603static int tegra_syncpt_incr(struct drm_device *drm, void *data,
604 struct drm_file *file)
605{
606 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
607 struct drm_tegra_syncpt_incr *args = data;
608 struct host1x_syncpt *sp;
609
610 sp = host1x_syncpt_get(host1x, args->id);
611 if (!sp)
612 return -EINVAL;
613
614 return host1x_syncpt_incr(sp);
615}
616
617static int tegra_syncpt_wait(struct drm_device *drm, void *data,
618 struct drm_file *file)
619{
620 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
621 struct drm_tegra_syncpt_wait *args = data;
622 struct host1x_syncpt *sp;
623
624 sp = host1x_syncpt_get(host1x, args->id);
625 if (!sp)
626 return -EINVAL;
627
628 return host1x_syncpt_wait(sp, args->thresh,
629 msecs_to_jiffies(args->timeout),
630 &args->value);
631}
632
633static int tegra_client_open(struct tegra_drm_file *fpriv,
634 struct tegra_drm_client *client,
635 struct tegra_drm_context *context)
636{
637 int err;
638
639 err = client->ops->open_channel(client, context);
640 if (err < 0)
641 return err;
642
643 err = idr_alloc(&fpriv->contexts, context, 1, 0, GFP_KERNEL);
644 if (err < 0) {
645 client->ops->close_channel(context);
646 return err;
647 }
648
649 context->client = client;
650 context->id = err;
651
652 return 0;
653}
654
655static int tegra_open_channel(struct drm_device *drm, void *data,
656 struct drm_file *file)
657{
658 struct tegra_drm_file *fpriv = file->driver_priv;
659 struct tegra_drm *tegra = drm->dev_private;
660 struct drm_tegra_open_channel *args = data;
661 struct tegra_drm_context *context;
662 struct tegra_drm_client *client;
663 int err = -ENODEV;
664
665 context = kzalloc(sizeof(*context), GFP_KERNEL);
666 if (!context)
667 return -ENOMEM;
668
669 mutex_lock(&fpriv->lock);
670
671 list_for_each_entry(client, &tegra->clients, list)
672 if (client->base.class == args->client) {
673 err = tegra_client_open(fpriv, client, context);
674 if (err < 0)
675 break;
676
677 args->context = context->id;
678 break;
679 }
680
681 if (err < 0)
682 kfree(context);
683
684 mutex_unlock(&fpriv->lock);
685 return err;
686}
687
688static int tegra_close_channel(struct drm_device *drm, void *data,
689 struct drm_file *file)
690{
691 struct tegra_drm_file *fpriv = file->driver_priv;
692 struct drm_tegra_close_channel *args = data;
693 struct tegra_drm_context *context;
694 int err = 0;
695
696 mutex_lock(&fpriv->lock);
697
698 context = idr_find(&fpriv->contexts, args->context);
699 if (!context) {
700 err = -EINVAL;
701 goto unlock;
702 }
703
704 idr_remove(&fpriv->contexts, context->id);
705 tegra_drm_context_free(context);
706
707unlock:
708 mutex_unlock(&fpriv->lock);
709 return err;
710}
711
712static int tegra_get_syncpt(struct drm_device *drm, void *data,
713 struct drm_file *file)
714{
715 struct tegra_drm_file *fpriv = file->driver_priv;
716 struct drm_tegra_get_syncpt *args = data;
717 struct tegra_drm_context *context;
718 struct host1x_syncpt *syncpt;
719 int err = 0;
720
721 mutex_lock(&fpriv->lock);
722
723 context = idr_find(&fpriv->contexts, args->context);
724 if (!context) {
725 err = -ENODEV;
726 goto unlock;
727 }
728
729 if (args->index >= context->client->base.num_syncpts) {
730 err = -EINVAL;
731 goto unlock;
732 }
733
734 syncpt = context->client->base.syncpts[args->index];
735 args->id = host1x_syncpt_id(syncpt);
736
737unlock:
738 mutex_unlock(&fpriv->lock);
739 return err;
740}
741
742static int tegra_submit(struct drm_device *drm, void *data,
743 struct drm_file *file)
744{
745 struct tegra_drm_file *fpriv = file->driver_priv;
746 struct drm_tegra_submit *args = data;
747 struct tegra_drm_context *context;
748 int err;
749
750 mutex_lock(&fpriv->lock);
751
752 context = idr_find(&fpriv->contexts, args->context);
753 if (!context) {
754 err = -ENODEV;
755 goto unlock;
756 }
757
758 err = context->client->ops->submit(context, args, drm, file);
759
760unlock:
761 mutex_unlock(&fpriv->lock);
762 return err;
763}
764
765static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
766 struct drm_file *file)
767{
768 struct tegra_drm_file *fpriv = file->driver_priv;
769 struct drm_tegra_get_syncpt_base *args = data;
770 struct tegra_drm_context *context;
771 struct host1x_syncpt_base *base;
772 struct host1x_syncpt *syncpt;
773 int err = 0;
774
775 mutex_lock(&fpriv->lock);
776
777 context = idr_find(&fpriv->contexts, args->context);
778 if (!context) {
779 err = -ENODEV;
780 goto unlock;
781 }
782
783 if (args->syncpt >= context->client->base.num_syncpts) {
784 err = -EINVAL;
785 goto unlock;
786 }
787
788 syncpt = context->client->base.syncpts[args->syncpt];
789
790 base = host1x_syncpt_get_base(syncpt);
791 if (!base) {
792 err = -ENXIO;
793 goto unlock;
794 }
795
796 args->id = host1x_syncpt_base_id(base);
797
798unlock:
799 mutex_unlock(&fpriv->lock);
800 return err;
801}
802
803static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
804 struct drm_file *file)
805{
806 struct drm_tegra_gem_set_tiling *args = data;
807 enum tegra_bo_tiling_mode mode;
808 struct drm_gem_object *gem;
809 unsigned long value = 0;
810 struct tegra_bo *bo;
811
812 switch (args->mode) {
813 case DRM_TEGRA_GEM_TILING_MODE_PITCH:
814 mode = TEGRA_BO_TILING_MODE_PITCH;
815
816 if (args->value != 0)
817 return -EINVAL;
818
819 break;
820
821 case DRM_TEGRA_GEM_TILING_MODE_TILED:
822 mode = TEGRA_BO_TILING_MODE_TILED;
823
824 if (args->value != 0)
825 return -EINVAL;
826
827 break;
828
829 case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
830 mode = TEGRA_BO_TILING_MODE_BLOCK;
831
832 if (args->value > 5)
833 return -EINVAL;
834
835 value = args->value;
836 break;
837
838 default:
839 return -EINVAL;
840 }
841
842 gem = drm_gem_object_lookup(file, args->handle);
843 if (!gem)
844 return -ENOENT;
845
846 bo = to_tegra_bo(gem);
847
848 bo->tiling.mode = mode;
849 bo->tiling.value = value;
850
851 drm_gem_object_put_unlocked(gem);
852
853 return 0;
854}
855
856static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
857 struct drm_file *file)
858{
859 struct drm_tegra_gem_get_tiling *args = data;
860 struct drm_gem_object *gem;
861 struct tegra_bo *bo;
862 int err = 0;
863
864 gem = drm_gem_object_lookup(file, args->handle);
865 if (!gem)
866 return -ENOENT;
867
868 bo = to_tegra_bo(gem);
869
870 switch (bo->tiling.mode) {
871 case TEGRA_BO_TILING_MODE_PITCH:
872 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
873 args->value = 0;
874 break;
875
876 case TEGRA_BO_TILING_MODE_TILED:
877 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
878 args->value = 0;
879 break;
880
881 case TEGRA_BO_TILING_MODE_BLOCK:
882 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
883 args->value = bo->tiling.value;
884 break;
885
886 default:
887 err = -EINVAL;
888 break;
889 }
890
891 drm_gem_object_put_unlocked(gem);
892
893 return err;
894}
895
896static int tegra_gem_set_flags(struct drm_device *drm, void *data,
897 struct drm_file *file)
898{
899 struct drm_tegra_gem_set_flags *args = data;
900 struct drm_gem_object *gem;
901 struct tegra_bo *bo;
902
903 if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
904 return -EINVAL;
905
906 gem = drm_gem_object_lookup(file, args->handle);
907 if (!gem)
908 return -ENOENT;
909
910 bo = to_tegra_bo(gem);
911 bo->flags = 0;
912
913 if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
914 bo->flags |= TEGRA_BO_BOTTOM_UP;
915
916 drm_gem_object_put_unlocked(gem);
917
918 return 0;
919}
920
921static int tegra_gem_get_flags(struct drm_device *drm, void *data,
922 struct drm_file *file)
923{
924 struct drm_tegra_gem_get_flags *args = data;
925 struct drm_gem_object *gem;
926 struct tegra_bo *bo;
927
928 gem = drm_gem_object_lookup(file, args->handle);
929 if (!gem)
930 return -ENOENT;
931
932 bo = to_tegra_bo(gem);
933 args->flags = 0;
934
935 if (bo->flags & TEGRA_BO_BOTTOM_UP)
936 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
937
938 drm_gem_object_put_unlocked(gem);
939
940 return 0;
941}
942#endif
943
944static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
945#ifdef CONFIG_DRM_TEGRA_STAGING
946 DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create,
947 DRM_UNLOCKED | DRM_RENDER_ALLOW),
948 DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap,
949 DRM_UNLOCKED | DRM_RENDER_ALLOW),
950 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read,
951 DRM_UNLOCKED | DRM_RENDER_ALLOW),
952 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr,
953 DRM_UNLOCKED | DRM_RENDER_ALLOW),
954 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait,
955 DRM_UNLOCKED | DRM_RENDER_ALLOW),
956 DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel,
957 DRM_UNLOCKED | DRM_RENDER_ALLOW),
958 DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel,
959 DRM_UNLOCKED | DRM_RENDER_ALLOW),
960 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt,
961 DRM_UNLOCKED | DRM_RENDER_ALLOW),
962 DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit,
963 DRM_UNLOCKED | DRM_RENDER_ALLOW),
964 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base,
965 DRM_UNLOCKED | DRM_RENDER_ALLOW),
966 DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling,
967 DRM_UNLOCKED | DRM_RENDER_ALLOW),
968 DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling,
969 DRM_UNLOCKED | DRM_RENDER_ALLOW),
970 DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags,
971 DRM_UNLOCKED | DRM_RENDER_ALLOW),
972 DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags,
973 DRM_UNLOCKED | DRM_RENDER_ALLOW),
974#endif
975};
976
977static const struct file_operations tegra_drm_fops = {
978 .owner = THIS_MODULE,
979 .open = drm_open,
980 .release = drm_release,
981 .unlocked_ioctl = drm_ioctl,
982 .mmap = tegra_drm_mmap,
983 .poll = drm_poll,
984 .read = drm_read,
985 .compat_ioctl = drm_compat_ioctl,
986 .llseek = noop_llseek,
987};
988
989static int tegra_drm_context_cleanup(int id, void *p, void *data)
990{
991 struct tegra_drm_context *context = p;
992
993 tegra_drm_context_free(context);
994
995 return 0;
996}
997
998static void tegra_drm_postclose(struct drm_device *drm, struct drm_file *file)
999{
1000 struct tegra_drm_file *fpriv = file->driver_priv;
1001
1002 mutex_lock(&fpriv->lock);
1003 idr_for_each(&fpriv->contexts, tegra_drm_context_cleanup, NULL);
1004 mutex_unlock(&fpriv->lock);
1005
1006 idr_destroy(&fpriv->contexts);
1007 mutex_destroy(&fpriv->lock);
1008 kfree(fpriv);
1009}
1010
1011#ifdef CONFIG_DEBUG_FS
1012static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
1013{
1014 struct drm_info_node *node = (struct drm_info_node *)s->private;
1015 struct drm_device *drm = node->minor->dev;
1016 struct drm_framebuffer *fb;
1017
1018 mutex_lock(&drm->mode_config.fb_lock);
1019
1020 list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
1021 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
1022 fb->base.id, fb->width, fb->height,
1023 fb->format->depth,
1024 fb->format->cpp[0] * 8,
1025 drm_framebuffer_read_refcount(fb));
1026 }
1027
1028 mutex_unlock(&drm->mode_config.fb_lock);
1029
1030 return 0;
1031}
1032
1033static int tegra_debugfs_iova(struct seq_file *s, void *data)
1034{
1035 struct drm_info_node *node = (struct drm_info_node *)s->private;
1036 struct drm_device *drm = node->minor->dev;
1037 struct tegra_drm *tegra = drm->dev_private;
1038 struct drm_printer p = drm_seq_file_printer(s);
1039
1040 if (tegra->domain) {
1041 mutex_lock(&tegra->mm_lock);
1042 drm_mm_print(&tegra->mm, &p);
1043 mutex_unlock(&tegra->mm_lock);
1044 }
1045
1046 return 0;
1047}
1048
1049static struct drm_info_list tegra_debugfs_list[] = {
1050 { "framebuffers", tegra_debugfs_framebuffers, 0 },
1051 { "iova", tegra_debugfs_iova, 0 },
1052};
1053
1054static int tegra_debugfs_init(struct drm_minor *minor)
1055{
1056 return drm_debugfs_create_files(tegra_debugfs_list,
1057 ARRAY_SIZE(tegra_debugfs_list),
1058 minor->debugfs_root, minor);
1059}
1060#endif
1061
1062static struct drm_driver tegra_drm_driver = {
1063 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
1064 DRIVER_ATOMIC | DRIVER_RENDER,
1065 .load = tegra_drm_load,
1066 .unload = tegra_drm_unload,
1067 .open = tegra_drm_open,
1068 .postclose = tegra_drm_postclose,
1069 .lastclose = drm_fb_helper_lastclose,
1070
1071#if defined(CONFIG_DEBUG_FS)
1072 .debugfs_init = tegra_debugfs_init,
1073#endif
1074
1075 .gem_free_object_unlocked = tegra_bo_free_object,
1076 .gem_vm_ops = &tegra_bo_vm_ops,
1077
1078 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
1079 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
1080 .gem_prime_export = tegra_gem_prime_export,
1081 .gem_prime_import = tegra_gem_prime_import,
1082
1083 .dumb_create = tegra_bo_dumb_create,
1084
1085 .ioctls = tegra_drm_ioctls,
1086 .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
1087 .fops = &tegra_drm_fops,
1088
1089 .name = DRIVER_NAME,
1090 .desc = DRIVER_DESC,
1091 .date = DRIVER_DATE,
1092 .major = DRIVER_MAJOR,
1093 .minor = DRIVER_MINOR,
1094 .patchlevel = DRIVER_PATCHLEVEL,
1095};
1096
1097int tegra_drm_register_client(struct tegra_drm *tegra,
1098 struct tegra_drm_client *client)
1099{
1100 mutex_lock(&tegra->clients_lock);
1101 list_add_tail(&client->list, &tegra->clients);
1102 mutex_unlock(&tegra->clients_lock);
1103
1104 return 0;
1105}
1106
1107int tegra_drm_unregister_client(struct tegra_drm *tegra,
1108 struct tegra_drm_client *client)
1109{
1110 mutex_lock(&tegra->clients_lock);
1111 list_del_init(&client->list);
1112 mutex_unlock(&tegra->clients_lock);
1113
1114 return 0;
1115}
1116
1117void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *dma)
1118{
1119 struct iova *alloc;
1120 void *virt;
1121 gfp_t gfp;
1122 int err;
1123
1124 if (tegra->domain)
1125 size = iova_align(&tegra->carveout.domain, size);
1126 else
1127 size = PAGE_ALIGN(size);
1128
1129 gfp = GFP_KERNEL | __GFP_ZERO;
1130 if (!tegra->domain) {
1131 /*
1132 * Many units only support 32-bit addresses, even on 64-bit
1133 * SoCs. If there is no IOMMU to translate into a 32-bit IO
1134 * virtual address space, force allocations to be in the
1135 * lower 32-bit range.
1136 */
1137 gfp |= GFP_DMA;
1138 }
1139
1140 virt = (void *)__get_free_pages(gfp, get_order(size));
1141 if (!virt)
1142 return ERR_PTR(-ENOMEM);
1143
1144 if (!tegra->domain) {
1145 /*
1146 * If IOMMU is disabled, devices address physical memory
1147 * directly.
1148 */
1149 *dma = virt_to_phys(virt);
1150 return virt;
1151 }
1152
1153 alloc = alloc_iova(&tegra->carveout.domain,
1154 size >> tegra->carveout.shift,
1155 tegra->carveout.limit, true);
1156 if (!alloc) {
1157 err = -EBUSY;
1158 goto free_pages;
1159 }
1160
1161 *dma = iova_dma_addr(&tegra->carveout.domain, alloc);
1162 err = iommu_map(tegra->domain, *dma, virt_to_phys(virt),
1163 size, IOMMU_READ | IOMMU_WRITE);
1164 if (err < 0)
1165 goto free_iova;
1166
1167 return virt;
1168
1169free_iova:
1170 __free_iova(&tegra->carveout.domain, alloc);
1171free_pages:
1172 free_pages((unsigned long)virt, get_order(size));
1173
1174 return ERR_PTR(err);
1175}
1176
1177void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
1178 dma_addr_t dma)
1179{
1180 if (tegra->domain)
1181 size = iova_align(&tegra->carveout.domain, size);
1182 else
1183 size = PAGE_ALIGN(size);
1184
1185 if (tegra->domain) {
1186 iommu_unmap(tegra->domain, dma, size);
1187 free_iova(&tegra->carveout.domain,
1188 iova_pfn(&tegra->carveout.domain, dma));
1189 }
1190
1191 free_pages((unsigned long)virt, get_order(size));
1192}
1193
1194static int host1x_drm_probe(struct host1x_device *dev)
1195{
1196 struct drm_driver *driver = &tegra_drm_driver;
1197 struct drm_device *drm;
1198 int err;
1199
1200 drm = drm_dev_alloc(driver, &dev->dev);
1201 if (IS_ERR(drm))
1202 return PTR_ERR(drm);
1203
1204 dev_set_drvdata(&dev->dev, drm);
1205
1206 err = drm_dev_register(drm, 0);
1207 if (err < 0)
1208 goto unref;
1209
1210 return 0;
1211
1212unref:
1213 drm_dev_unref(drm);
1214 return err;
1215}
1216
1217static int host1x_drm_remove(struct host1x_device *dev)
1218{
1219 struct drm_device *drm = dev_get_drvdata(&dev->dev);
1220
1221 drm_dev_unregister(drm);
1222 drm_dev_unref(drm);
1223
1224 return 0;
1225}
1226
1227#ifdef CONFIG_PM_SLEEP
1228static int host1x_drm_suspend(struct device *dev)
1229{
1230 struct drm_device *drm = dev_get_drvdata(dev);
1231 struct tegra_drm *tegra = drm->dev_private;
1232
1233 drm_kms_helper_poll_disable(drm);
1234 tegra_drm_fb_suspend(drm);
1235
1236 tegra->state = drm_atomic_helper_suspend(drm);
1237 if (IS_ERR(tegra->state)) {
1238 tegra_drm_fb_resume(drm);
1239 drm_kms_helper_poll_enable(drm);
1240 return PTR_ERR(tegra->state);
1241 }
1242
1243 return 0;
1244}
1245
1246static int host1x_drm_resume(struct device *dev)
1247{
1248 struct drm_device *drm = dev_get_drvdata(dev);
1249 struct tegra_drm *tegra = drm->dev_private;
1250
1251 drm_atomic_helper_resume(drm, tegra->state);
1252 tegra_drm_fb_resume(drm);
1253 drm_kms_helper_poll_enable(drm);
1254
1255 return 0;
1256}
1257#endif
1258
1259static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1260 host1x_drm_resume);
1261
1262static const struct of_device_id host1x_drm_subdevs[] = {
1263 { .compatible = "nvidia,tegra20-dc", },
1264 { .compatible = "nvidia,tegra20-hdmi", },
1265 { .compatible = "nvidia,tegra20-gr2d", },
1266 { .compatible = "nvidia,tegra20-gr3d", },
1267 { .compatible = "nvidia,tegra30-dc", },
1268 { .compatible = "nvidia,tegra30-hdmi", },
1269 { .compatible = "nvidia,tegra30-gr2d", },
1270 { .compatible = "nvidia,tegra30-gr3d", },
1271 { .compatible = "nvidia,tegra114-dsi", },
1272 { .compatible = "nvidia,tegra114-hdmi", },
1273 { .compatible = "nvidia,tegra114-gr3d", },
1274 { .compatible = "nvidia,tegra124-dc", },
1275 { .compatible = "nvidia,tegra124-sor", },
1276 { .compatible = "nvidia,tegra124-hdmi", },
1277 { .compatible = "nvidia,tegra124-dsi", },
1278 { .compatible = "nvidia,tegra124-vic", },
1279 { .compatible = "nvidia,tegra132-dsi", },
1280 { .compatible = "nvidia,tegra210-dc", },
1281 { .compatible = "nvidia,tegra210-dsi", },
1282 { .compatible = "nvidia,tegra210-sor", },
1283 { .compatible = "nvidia,tegra210-sor1", },
1284 { .compatible = "nvidia,tegra210-vic", },
1285 { .compatible = "nvidia,tegra186-display", },
1286 { .compatible = "nvidia,tegra186-dc", },
1287 { .compatible = "nvidia,tegra186-sor", },
1288 { .compatible = "nvidia,tegra186-sor1", },
1289 { .compatible = "nvidia,tegra186-vic", },
1290 { /* sentinel */ }
1291};
1292
1293static struct host1x_driver host1x_drm_driver = {
1294 .driver = {
1295 .name = "drm",
1296 .pm = &host1x_drm_pm_ops,
1297 },
1298 .probe = host1x_drm_probe,
1299 .remove = host1x_drm_remove,
1300 .subdevs = host1x_drm_subdevs,
1301};
1302
1303static struct platform_driver * const drivers[] = {
1304 &tegra_display_hub_driver,
1305 &tegra_dc_driver,
1306 &tegra_hdmi_driver,
1307 &tegra_dsi_driver,
1308 &tegra_dpaux_driver,
1309 &tegra_sor_driver,
1310 &tegra_gr2d_driver,
1311 &tegra_gr3d_driver,
1312 &tegra_vic_driver,
1313};
1314
1315static int __init host1x_drm_init(void)
1316{
1317 int err;
1318
1319 err = host1x_driver_register(&host1x_drm_driver);
1320 if (err < 0)
1321 return err;
1322
1323 err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1324 if (err < 0)
1325 goto unregister_host1x;
1326
1327 return 0;
1328
1329unregister_host1x:
1330 host1x_driver_unregister(&host1x_drm_driver);
1331 return err;
1332}
1333module_init(host1x_drm_init);
1334
1335static void __exit host1x_drm_exit(void)
1336{
1337 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1338 host1x_driver_unregister(&host1x_drm_driver);
1339}
1340module_exit(host1x_drm_exit);
1341
1342MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1343MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1344MODULE_LICENSE("GPL v2");