1
2
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4
5
6
7#include <linux/bitops.h>
8#include <linux/host1x.h>
9#include <linux/idr.h>
10#include <linux/iommu.h>
11
12#include <drm/drm_atomic.h>
13#include <drm/drm_atomic_helper.h>
14
15#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
16#include <asm/dma-iommu.h>
17#endif
18
19#include "drm.h"
20#include "gem.h"
21
22#define DRIVER_NAME "tegra"
23#define DRIVER_DESC "NVIDIA Tegra graphics"
24#define DRIVER_DATE "20120330"
25#define DRIVER_MAJOR 0
26#define DRIVER_MINOR 0
27#define DRIVER_PATCHLEVEL 0
28
29#define CARVEOUT_SZ SZ_64M
30#define CDMA_GATHER_FETCHES_MAX_NB 16383
31
32struct tegra_drm_file {
33 struct idr contexts;
34 struct mutex lock;
35};
36
37static int tegra_atomic_check(struct drm_device *drm,
38 struct drm_atomic_state *state)
39{
40 int err;
41
42 err = drm_atomic_helper_check(drm, state);
43 if (err < 0)
44 return err;
45
46 return tegra_display_hub_atomic_check(drm, state);
47}
48
49static const struct drm_mode_config_funcs tegra_drm_mode_config_funcs = {
50 .fb_create = tegra_fb_create,
51#ifdef CONFIG_DRM_FBDEV_EMULATION
52 .output_poll_changed = drm_fb_helper_output_poll_changed,
53#endif
54 .atomic_check = tegra_atomic_check,
55 .atomic_commit = drm_atomic_helper_commit,
56};
57
58static void tegra_atomic_commit_tail(struct drm_atomic_state *old_state)
59{
60 struct drm_device *drm = old_state->dev;
61 struct tegra_drm *tegra = drm->dev_private;
62
63 if (tegra->hub) {
64 drm_atomic_helper_commit_modeset_disables(drm, old_state);
65 tegra_display_hub_atomic_commit(drm, old_state);
66 drm_atomic_helper_commit_planes(drm, old_state, 0);
67 drm_atomic_helper_commit_modeset_enables(drm, old_state);
68 drm_atomic_helper_commit_hw_done(old_state);
69 drm_atomic_helper_wait_for_vblanks(drm, old_state);
70 drm_atomic_helper_cleanup_planes(drm, old_state);
71 } else {
72 drm_atomic_helper_commit_tail_rpm(old_state);
73 }
74}
75
76static const struct drm_mode_config_helper_funcs
77tegra_drm_mode_config_helpers = {
78 .atomic_commit_tail = tegra_atomic_commit_tail,
79};
80
81static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
82{
83 struct host1x_device *device = to_host1x_device(drm->dev);
84 struct tegra_drm *tegra;
85 int err;
86
87 tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
88 if (!tegra)
89 return -ENOMEM;
90
91 if (iommu_present(&platform_bus_type)) {
92 tegra->domain = iommu_domain_alloc(&platform_bus_type);
93 if (!tegra->domain) {
94 err = -ENOMEM;
95 goto free;
96 }
97
98 err = iova_cache_get();
99 if (err < 0)
100 goto domain;
101 }
102
103 mutex_init(&tegra->clients_lock);
104 INIT_LIST_HEAD(&tegra->clients);
105
106 drm->dev_private = tegra;
107 tegra->drm = drm;
108
109 drm_mode_config_init(drm);
110
111 drm->mode_config.min_width = 0;
112 drm->mode_config.min_height = 0;
113
114 drm->mode_config.max_width = 4096;
115 drm->mode_config.max_height = 4096;
116
117 drm->mode_config.allow_fb_modifiers = true;
118
119 drm->mode_config.normalize_zpos = true;
120
121 drm->mode_config.funcs = &tegra_drm_mode_config_funcs;
122 drm->mode_config.helper_private = &tegra_drm_mode_config_helpers;
123
124 err = tegra_drm_fb_prepare(drm);
125 if (err < 0)
126 goto config;
127
128 drm_kms_helper_poll_init(drm);
129
130 err = host1x_device_init(device);
131 if (err < 0)
132 goto fbdev;
133
134 if (tegra->domain) {
135 u64 carveout_start, carveout_end, gem_start, gem_end;
136 u64 dma_mask = dma_get_mask(&device->dev);
137 dma_addr_t start, end;
138 unsigned long order;
139
140 start = tegra->domain->geometry.aperture_start & dma_mask;
141 end = tegra->domain->geometry.aperture_end & dma_mask;
142
143 gem_start = start;
144 gem_end = end - CARVEOUT_SZ;
145 carveout_start = gem_end + 1;
146 carveout_end = end;
147
148 order = __ffs(tegra->domain->pgsize_bitmap);
149 init_iova_domain(&tegra->carveout.domain, 1UL << order,
150 carveout_start >> order);
151
152 tegra->carveout.shift = iova_shift(&tegra->carveout.domain);
153 tegra->carveout.limit = carveout_end >> tegra->carveout.shift;
154
155 drm_mm_init(&tegra->mm, gem_start, gem_end - gem_start + 1);
156 mutex_init(&tegra->mm_lock);
157
158 DRM_DEBUG("IOMMU apertures:\n");
159 DRM_DEBUG(" GEM: %#llx-%#llx\n", gem_start, gem_end);
160 DRM_DEBUG(" Carveout: %#llx-%#llx\n", carveout_start,
161 carveout_end);
162 }
163
164 if (tegra->hub) {
165 err = tegra_display_hub_prepare(tegra->hub);
166 if (err < 0)
167 goto device;
168 }
169
170
171
172
173
174
175 drm->irq_enabled = true;
176
177
178 drm->max_vblank_count = 0xffffffff;
179
180 err = drm_vblank_init(drm, drm->mode_config.num_crtc);
181 if (err < 0)
182 goto hub;
183
184 drm_mode_config_reset(drm);
185
186 err = tegra_drm_fb_init(drm);
187 if (err < 0)
188 goto hub;
189
190 return 0;
191
192hub:
193 if (tegra->hub)
194 tegra_display_hub_cleanup(tegra->hub);
195device:
196 host1x_device_exit(device);
197fbdev:
198 drm_kms_helper_poll_fini(drm);
199 tegra_drm_fb_free(drm);
200config:
201 drm_mode_config_cleanup(drm);
202
203 if (tegra->domain) {
204 mutex_destroy(&tegra->mm_lock);
205 drm_mm_takedown(&tegra->mm);
206 put_iova_domain(&tegra->carveout.domain);
207 iova_cache_put();
208 }
209domain:
210 if (tegra->domain)
211 iommu_domain_free(tegra->domain);
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 mutex_destroy(&tegra->mm_lock);
234 drm_mm_takedown(&tegra->mm);
235 put_iova_domain(&tegra->carveout.domain);
236 iova_cache_put();
237 iommu_domain_free(tegra->domain);
238 }
239
240 kfree(tegra);
241}
242
243static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
244{
245 struct tegra_drm_file *fpriv;
246
247 fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
248 if (!fpriv)
249 return -ENOMEM;
250
251 idr_init(&fpriv->contexts);
252 mutex_init(&fpriv->lock);
253 filp->driver_priv = fpriv;
254
255 return 0;
256}
257
258static void tegra_drm_context_free(struct tegra_drm_context *context)
259{
260 context->client->ops->close_channel(context);
261 kfree(context);
262}
263
264static struct host1x_bo *
265host1x_bo_lookup(struct drm_file *file, u32 handle)
266{
267 struct drm_gem_object *gem;
268 struct tegra_bo *bo;
269
270 gem = drm_gem_object_lookup(file, handle);
271 if (!gem)
272 return NULL;
273
274 bo = to_tegra_bo(gem);
275 return &bo->base;
276}
277
278static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
279 struct drm_tegra_reloc __user *src,
280 struct drm_device *drm,
281 struct drm_file *file)
282{
283 u32 cmdbuf, target;
284 int err;
285
286 err = get_user(cmdbuf, &src->cmdbuf.handle);
287 if (err < 0)
288 return err;
289
290 err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
291 if (err < 0)
292 return err;
293
294 err = get_user(target, &src->target.handle);
295 if (err < 0)
296 return err;
297
298 err = get_user(dest->target.offset, &src->target.offset);
299 if (err < 0)
300 return err;
301
302 err = get_user(dest->shift, &src->shift);
303 if (err < 0)
304 return err;
305
306 dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf);
307 if (!dest->cmdbuf.bo)
308 return -ENOENT;
309
310 dest->target.bo = host1x_bo_lookup(file, target);
311 if (!dest->target.bo)
312 return -ENOENT;
313
314 return 0;
315}
316
317int tegra_drm_submit(struct tegra_drm_context *context,
318 struct drm_tegra_submit *args, struct drm_device *drm,
319 struct drm_file *file)
320{
321 struct host1x_client *client = &context->client->base;
322 unsigned int num_cmdbufs = args->num_cmdbufs;
323 unsigned int num_relocs = args->num_relocs;
324 struct drm_tegra_cmdbuf __user *user_cmdbufs;
325 struct drm_tegra_reloc __user *user_relocs;
326 struct drm_tegra_syncpt __user *user_syncpt;
327 struct drm_tegra_syncpt syncpt;
328 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
329 struct drm_gem_object **refs;
330 struct host1x_syncpt *sp;
331 struct host1x_job *job;
332 unsigned int num_refs;
333 int err;
334
335 user_cmdbufs = u64_to_user_ptr(args->cmdbufs);
336 user_relocs = u64_to_user_ptr(args->relocs);
337 user_syncpt = u64_to_user_ptr(args->syncpts);
338
339
340 if (args->num_syncpts != 1)
341 return -EINVAL;
342
343
344 if (args->num_waitchks != 0)
345 return -EINVAL;
346
347 job = host1x_job_alloc(context->channel, args->num_cmdbufs,
348 args->num_relocs);
349 if (!job)
350 return -ENOMEM;
351
352 job->num_relocs = args->num_relocs;
353 job->client = client;
354 job->class = client->class;
355 job->serialize = true;
356
357
358
359
360
361 num_refs = num_cmdbufs + num_relocs * 2;
362
363 refs = kmalloc_array(num_refs, sizeof(*refs), GFP_KERNEL);
364 if (!refs) {
365 err = -ENOMEM;
366 goto put;
367 }
368
369
370 num_refs = 0;
371
372 while (num_cmdbufs) {
373 struct drm_tegra_cmdbuf cmdbuf;
374 struct host1x_bo *bo;
375 struct tegra_bo *obj;
376 u64 offset;
377
378 if (copy_from_user(&cmdbuf, user_cmdbufs, sizeof(cmdbuf))) {
379 err = -EFAULT;
380 goto fail;
381 }
382
383
384
385
386
387 if (cmdbuf.words > CDMA_GATHER_FETCHES_MAX_NB) {
388 err = -EINVAL;
389 goto fail;
390 }
391
392 bo = host1x_bo_lookup(file, cmdbuf.handle);
393 if (!bo) {
394 err = -ENOENT;
395 goto fail;
396 }
397
398 offset = (u64)cmdbuf.offset + (u64)cmdbuf.words * sizeof(u32);
399 obj = host1x_to_tegra_bo(bo);
400 refs[num_refs++] = &obj->gem;
401
402
403
404
405
406
407 if (offset & 3 || offset > obj->gem.size) {
408 err = -EINVAL;
409 goto fail;
410 }
411
412 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
413 num_cmdbufs--;
414 user_cmdbufs++;
415 }
416
417
418 while (num_relocs--) {
419 struct host1x_reloc *reloc;
420 struct tegra_bo *obj;
421
422 err = host1x_reloc_copy_from_user(&job->relocs[num_relocs],
423 &user_relocs[num_relocs], drm,
424 file);
425 if (err < 0)
426 goto fail;
427
428 reloc = &job->relocs[num_relocs];
429 obj = host1x_to_tegra_bo(reloc->cmdbuf.bo);
430 refs[num_refs++] = &obj->gem;
431
432
433
434
435
436
437 if (reloc->cmdbuf.offset & 3 ||
438 reloc->cmdbuf.offset >= obj->gem.size) {
439 err = -EINVAL;
440 goto fail;
441 }
442
443 obj = host1x_to_tegra_bo(reloc->target.bo);
444 refs[num_refs++] = &obj->gem;
445
446 if (reloc->target.offset >= obj->gem.size) {
447 err = -EINVAL;
448 goto fail;
449 }
450 }
451
452 if (copy_from_user(&syncpt, user_syncpt, sizeof(syncpt))) {
453 err = -EFAULT;
454 goto fail;
455 }
456
457
458 sp = host1x_syncpt_get(host1x, syncpt.id);
459 if (!sp) {
460 err = -ENOENT;
461 goto fail;
462 }
463
464 job->is_addr_reg = context->client->ops->is_addr_reg;
465 job->is_valid_class = context->client->ops->is_valid_class;
466 job->syncpt_incrs = syncpt.incrs;
467 job->syncpt_id = syncpt.id;
468 job->timeout = 10000;
469
470 if (args->timeout && args->timeout < 10000)
471 job->timeout = args->timeout;
472
473 err = host1x_job_pin(job, context->client->base.dev);
474 if (err)
475 goto fail;
476
477 err = host1x_job_submit(job);
478 if (err) {
479 host1x_job_unpin(job);
480 goto fail;
481 }
482
483 args->fence = job->syncpt_end;
484
485fail:
486 while (num_refs--)
487 drm_gem_object_put_unlocked(refs[num_refs]);
488
489 kfree(refs);
490
491put:
492 host1x_job_put(job);
493 return err;
494}
495
496
497#ifdef CONFIG_DRM_TEGRA_STAGING
498static int tegra_gem_create(struct drm_device *drm, void *data,
499 struct drm_file *file)
500{
501 struct drm_tegra_gem_create *args = data;
502 struct tegra_bo *bo;
503
504 bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
505 &args->handle);
506 if (IS_ERR(bo))
507 return PTR_ERR(bo);
508
509 return 0;
510}
511
512static int tegra_gem_mmap(struct drm_device *drm, void *data,
513 struct drm_file *file)
514{
515 struct drm_tegra_gem_mmap *args = data;
516 struct drm_gem_object *gem;
517 struct tegra_bo *bo;
518
519 gem = drm_gem_object_lookup(file, args->handle);
520 if (!gem)
521 return -EINVAL;
522
523 bo = to_tegra_bo(gem);
524
525 args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
526
527 drm_gem_object_put_unlocked(gem);
528
529 return 0;
530}
531
532static int tegra_syncpt_read(struct drm_device *drm, void *data,
533 struct drm_file *file)
534{
535 struct host1x *host = dev_get_drvdata(drm->dev->parent);
536 struct drm_tegra_syncpt_read *args = data;
537 struct host1x_syncpt *sp;
538
539 sp = host1x_syncpt_get(host, args->id);
540 if (!sp)
541 return -EINVAL;
542
543 args->value = host1x_syncpt_read_min(sp);
544 return 0;
545}
546
547static int tegra_syncpt_incr(struct drm_device *drm, void *data,
548 struct drm_file *file)
549{
550 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
551 struct drm_tegra_syncpt_incr *args = data;
552 struct host1x_syncpt *sp;
553
554 sp = host1x_syncpt_get(host1x, args->id);
555 if (!sp)
556 return -EINVAL;
557
558 return host1x_syncpt_incr(sp);
559}
560
561static int tegra_syncpt_wait(struct drm_device *drm, void *data,
562 struct drm_file *file)
563{
564 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
565 struct drm_tegra_syncpt_wait *args = data;
566 struct host1x_syncpt *sp;
567
568 sp = host1x_syncpt_get(host1x, args->id);
569 if (!sp)
570 return -EINVAL;
571
572 return host1x_syncpt_wait(sp, args->thresh,
573 msecs_to_jiffies(args->timeout),
574 &args->value);
575}
576
577static int tegra_client_open(struct tegra_drm_file *fpriv,
578 struct tegra_drm_client *client,
579 struct tegra_drm_context *context)
580{
581 int err;
582
583 err = client->ops->open_channel(client, context);
584 if (err < 0)
585 return err;
586
587 err = idr_alloc(&fpriv->contexts, context, 1, 0, GFP_KERNEL);
588 if (err < 0) {
589 client->ops->close_channel(context);
590 return err;
591 }
592
593 context->client = client;
594 context->id = err;
595
596 return 0;
597}
598
599static int tegra_open_channel(struct drm_device *drm, void *data,
600 struct drm_file *file)
601{
602 struct tegra_drm_file *fpriv = file->driver_priv;
603 struct tegra_drm *tegra = drm->dev_private;
604 struct drm_tegra_open_channel *args = data;
605 struct tegra_drm_context *context;
606 struct tegra_drm_client *client;
607 int err = -ENODEV;
608
609 context = kzalloc(sizeof(*context), GFP_KERNEL);
610 if (!context)
611 return -ENOMEM;
612
613 mutex_lock(&fpriv->lock);
614
615 list_for_each_entry(client, &tegra->clients, list)
616 if (client->base.class == args->client) {
617 err = tegra_client_open(fpriv, client, context);
618 if (err < 0)
619 break;
620
621 args->context = context->id;
622 break;
623 }
624
625 if (err < 0)
626 kfree(context);
627
628 mutex_unlock(&fpriv->lock);
629 return err;
630}
631
632static int tegra_close_channel(struct drm_device *drm, void *data,
633 struct drm_file *file)
634{
635 struct tegra_drm_file *fpriv = file->driver_priv;
636 struct drm_tegra_close_channel *args = data;
637 struct tegra_drm_context *context;
638 int err = 0;
639
640 mutex_lock(&fpriv->lock);
641
642 context = idr_find(&fpriv->contexts, args->context);
643 if (!context) {
644 err = -EINVAL;
645 goto unlock;
646 }
647
648 idr_remove(&fpriv->contexts, context->id);
649 tegra_drm_context_free(context);
650
651unlock:
652 mutex_unlock(&fpriv->lock);
653 return err;
654}
655
656static int tegra_get_syncpt(struct drm_device *drm, void *data,
657 struct drm_file *file)
658{
659 struct tegra_drm_file *fpriv = file->driver_priv;
660 struct drm_tegra_get_syncpt *args = data;
661 struct tegra_drm_context *context;
662 struct host1x_syncpt *syncpt;
663 int err = 0;
664
665 mutex_lock(&fpriv->lock);
666
667 context = idr_find(&fpriv->contexts, args->context);
668 if (!context) {
669 err = -ENODEV;
670 goto unlock;
671 }
672
673 if (args->index >= context->client->base.num_syncpts) {
674 err = -EINVAL;
675 goto unlock;
676 }
677
678 syncpt = context->client->base.syncpts[args->index];
679 args->id = host1x_syncpt_id(syncpt);
680
681unlock:
682 mutex_unlock(&fpriv->lock);
683 return err;
684}
685
686static int tegra_submit(struct drm_device *drm, void *data,
687 struct drm_file *file)
688{
689 struct tegra_drm_file *fpriv = file->driver_priv;
690 struct drm_tegra_submit *args = data;
691 struct tegra_drm_context *context;
692 int err;
693
694 mutex_lock(&fpriv->lock);
695
696 context = idr_find(&fpriv->contexts, args->context);
697 if (!context) {
698 err = -ENODEV;
699 goto unlock;
700 }
701
702 err = context->client->ops->submit(context, args, drm, file);
703
704unlock:
705 mutex_unlock(&fpriv->lock);
706 return err;
707}
708
709static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
710 struct drm_file *file)
711{
712 struct tegra_drm_file *fpriv = file->driver_priv;
713 struct drm_tegra_get_syncpt_base *args = data;
714 struct tegra_drm_context *context;
715 struct host1x_syncpt_base *base;
716 struct host1x_syncpt *syncpt;
717 int err = 0;
718
719 mutex_lock(&fpriv->lock);
720
721 context = idr_find(&fpriv->contexts, args->context);
722 if (!context) {
723 err = -ENODEV;
724 goto unlock;
725 }
726
727 if (args->syncpt >= context->client->base.num_syncpts) {
728 err = -EINVAL;
729 goto unlock;
730 }
731
732 syncpt = context->client->base.syncpts[args->syncpt];
733
734 base = host1x_syncpt_get_base(syncpt);
735 if (!base) {
736 err = -ENXIO;
737 goto unlock;
738 }
739
740 args->id = host1x_syncpt_base_id(base);
741
742unlock:
743 mutex_unlock(&fpriv->lock);
744 return err;
745}
746
747static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
748 struct drm_file *file)
749{
750 struct drm_tegra_gem_set_tiling *args = data;
751 enum tegra_bo_tiling_mode mode;
752 struct drm_gem_object *gem;
753 unsigned long value = 0;
754 struct tegra_bo *bo;
755
756 switch (args->mode) {
757 case DRM_TEGRA_GEM_TILING_MODE_PITCH:
758 mode = TEGRA_BO_TILING_MODE_PITCH;
759
760 if (args->value != 0)
761 return -EINVAL;
762
763 break;
764
765 case DRM_TEGRA_GEM_TILING_MODE_TILED:
766 mode = TEGRA_BO_TILING_MODE_TILED;
767
768 if (args->value != 0)
769 return -EINVAL;
770
771 break;
772
773 case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
774 mode = TEGRA_BO_TILING_MODE_BLOCK;
775
776 if (args->value > 5)
777 return -EINVAL;
778
779 value = args->value;
780 break;
781
782 default:
783 return -EINVAL;
784 }
785
786 gem = drm_gem_object_lookup(file, args->handle);
787 if (!gem)
788 return -ENOENT;
789
790 bo = to_tegra_bo(gem);
791
792 bo->tiling.mode = mode;
793 bo->tiling.value = value;
794
795 drm_gem_object_put_unlocked(gem);
796
797 return 0;
798}
799
800static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
801 struct drm_file *file)
802{
803 struct drm_tegra_gem_get_tiling *args = data;
804 struct drm_gem_object *gem;
805 struct tegra_bo *bo;
806 int err = 0;
807
808 gem = drm_gem_object_lookup(file, args->handle);
809 if (!gem)
810 return -ENOENT;
811
812 bo = to_tegra_bo(gem);
813
814 switch (bo->tiling.mode) {
815 case TEGRA_BO_TILING_MODE_PITCH:
816 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
817 args->value = 0;
818 break;
819
820 case TEGRA_BO_TILING_MODE_TILED:
821 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
822 args->value = 0;
823 break;
824
825 case TEGRA_BO_TILING_MODE_BLOCK:
826 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
827 args->value = bo->tiling.value;
828 break;
829
830 default:
831 err = -EINVAL;
832 break;
833 }
834
835 drm_gem_object_put_unlocked(gem);
836
837 return err;
838}
839
840static int tegra_gem_set_flags(struct drm_device *drm, void *data,
841 struct drm_file *file)
842{
843 struct drm_tegra_gem_set_flags *args = data;
844 struct drm_gem_object *gem;
845 struct tegra_bo *bo;
846
847 if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
848 return -EINVAL;
849
850 gem = drm_gem_object_lookup(file, args->handle);
851 if (!gem)
852 return -ENOENT;
853
854 bo = to_tegra_bo(gem);
855 bo->flags = 0;
856
857 if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
858 bo->flags |= TEGRA_BO_BOTTOM_UP;
859
860 drm_gem_object_put_unlocked(gem);
861
862 return 0;
863}
864
865static int tegra_gem_get_flags(struct drm_device *drm, void *data,
866 struct drm_file *file)
867{
868 struct drm_tegra_gem_get_flags *args = data;
869 struct drm_gem_object *gem;
870 struct tegra_bo *bo;
871
872 gem = drm_gem_object_lookup(file, args->handle);
873 if (!gem)
874 return -ENOENT;
875
876 bo = to_tegra_bo(gem);
877 args->flags = 0;
878
879 if (bo->flags & TEGRA_BO_BOTTOM_UP)
880 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
881
882 drm_gem_object_put_unlocked(gem);
883
884 return 0;
885}
886#endif
887
888static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
889#ifdef CONFIG_DRM_TEGRA_STAGING
890 DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create,
891 DRM_UNLOCKED | DRM_RENDER_ALLOW),
892 DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap,
893 DRM_UNLOCKED | DRM_RENDER_ALLOW),
894 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read,
895 DRM_UNLOCKED | DRM_RENDER_ALLOW),
896 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr,
897 DRM_UNLOCKED | DRM_RENDER_ALLOW),
898 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait,
899 DRM_UNLOCKED | DRM_RENDER_ALLOW),
900 DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel,
901 DRM_UNLOCKED | DRM_RENDER_ALLOW),
902 DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel,
903 DRM_UNLOCKED | DRM_RENDER_ALLOW),
904 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt,
905 DRM_UNLOCKED | DRM_RENDER_ALLOW),
906 DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit,
907 DRM_UNLOCKED | DRM_RENDER_ALLOW),
908 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base,
909 DRM_UNLOCKED | DRM_RENDER_ALLOW),
910 DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling,
911 DRM_UNLOCKED | DRM_RENDER_ALLOW),
912 DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling,
913 DRM_UNLOCKED | DRM_RENDER_ALLOW),
914 DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags,
915 DRM_UNLOCKED | DRM_RENDER_ALLOW),
916 DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags,
917 DRM_UNLOCKED | DRM_RENDER_ALLOW),
918#endif
919};
920
921static const struct file_operations tegra_drm_fops = {
922 .owner = THIS_MODULE,
923 .open = drm_open,
924 .release = drm_release,
925 .unlocked_ioctl = drm_ioctl,
926 .mmap = tegra_drm_mmap,
927 .poll = drm_poll,
928 .read = drm_read,
929 .compat_ioctl = drm_compat_ioctl,
930 .llseek = noop_llseek,
931};
932
933static int tegra_drm_context_cleanup(int id, void *p, void *data)
934{
935 struct tegra_drm_context *context = p;
936
937 tegra_drm_context_free(context);
938
939 return 0;
940}
941
942static void tegra_drm_postclose(struct drm_device *drm, struct drm_file *file)
943{
944 struct tegra_drm_file *fpriv = file->driver_priv;
945
946 mutex_lock(&fpriv->lock);
947 idr_for_each(&fpriv->contexts, tegra_drm_context_cleanup, NULL);
948 mutex_unlock(&fpriv->lock);
949
950 idr_destroy(&fpriv->contexts);
951 mutex_destroy(&fpriv->lock);
952 kfree(fpriv);
953}
954
955#ifdef CONFIG_DEBUG_FS
956static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
957{
958 struct drm_info_node *node = (struct drm_info_node *)s->private;
959 struct drm_device *drm = node->minor->dev;
960 struct drm_framebuffer *fb;
961
962 mutex_lock(&drm->mode_config.fb_lock);
963
964 list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
965 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
966 fb->base.id, fb->width, fb->height,
967 fb->format->depth,
968 fb->format->cpp[0] * 8,
969 drm_framebuffer_read_refcount(fb));
970 }
971
972 mutex_unlock(&drm->mode_config.fb_lock);
973
974 return 0;
975}
976
977static int tegra_debugfs_iova(struct seq_file *s, void *data)
978{
979 struct drm_info_node *node = (struct drm_info_node *)s->private;
980 struct drm_device *drm = node->minor->dev;
981 struct tegra_drm *tegra = drm->dev_private;
982 struct drm_printer p = drm_seq_file_printer(s);
983
984 if (tegra->domain) {
985 mutex_lock(&tegra->mm_lock);
986 drm_mm_print(&tegra->mm, &p);
987 mutex_unlock(&tegra->mm_lock);
988 }
989
990 return 0;
991}
992
993static struct drm_info_list tegra_debugfs_list[] = {
994 { "framebuffers", tegra_debugfs_framebuffers, 0 },
995 { "iova", tegra_debugfs_iova, 0 },
996};
997
998static int tegra_debugfs_init(struct drm_minor *minor)
999{
1000 return drm_debugfs_create_files(tegra_debugfs_list,
1001 ARRAY_SIZE(tegra_debugfs_list),
1002 minor->debugfs_root, minor);
1003}
1004#endif
1005
1006static struct drm_driver tegra_drm_driver = {
1007 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
1008 DRIVER_ATOMIC | DRIVER_RENDER,
1009 .load = tegra_drm_load,
1010 .unload = tegra_drm_unload,
1011 .open = tegra_drm_open,
1012 .postclose = tegra_drm_postclose,
1013 .lastclose = drm_fb_helper_lastclose,
1014
1015#if defined(CONFIG_DEBUG_FS)
1016 .debugfs_init = tegra_debugfs_init,
1017#endif
1018
1019 .gem_free_object_unlocked = tegra_bo_free_object,
1020 .gem_vm_ops = &tegra_bo_vm_ops,
1021
1022 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
1023 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
1024 .gem_prime_export = tegra_gem_prime_export,
1025 .gem_prime_import = tegra_gem_prime_import,
1026
1027 .dumb_create = tegra_bo_dumb_create,
1028
1029 .ioctls = tegra_drm_ioctls,
1030 .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
1031 .fops = &tegra_drm_fops,
1032
1033 .name = DRIVER_NAME,
1034 .desc = DRIVER_DESC,
1035 .date = DRIVER_DATE,
1036 .major = DRIVER_MAJOR,
1037 .minor = DRIVER_MINOR,
1038 .patchlevel = DRIVER_PATCHLEVEL,
1039};
1040
1041int tegra_drm_register_client(struct tegra_drm *tegra,
1042 struct tegra_drm_client *client)
1043{
1044 mutex_lock(&tegra->clients_lock);
1045 list_add_tail(&client->list, &tegra->clients);
1046 client->drm = tegra;
1047 mutex_unlock(&tegra->clients_lock);
1048
1049 return 0;
1050}
1051
1052int tegra_drm_unregister_client(struct tegra_drm *tegra,
1053 struct tegra_drm_client *client)
1054{
1055 mutex_lock(&tegra->clients_lock);
1056 list_del_init(&client->list);
1057 client->drm = NULL;
1058 mutex_unlock(&tegra->clients_lock);
1059
1060 return 0;
1061}
1062
1063struct iommu_group *host1x_client_iommu_attach(struct host1x_client *client,
1064 bool shared)
1065{
1066 struct drm_device *drm = dev_get_drvdata(client->parent);
1067 struct tegra_drm *tegra = drm->dev_private;
1068 struct iommu_group *group = NULL;
1069 int err;
1070
1071 if (tegra->domain) {
1072 group = iommu_group_get(client->dev);
1073 if (!group) {
1074 dev_err(client->dev, "failed to get IOMMU group\n");
1075 return ERR_PTR(-ENODEV);
1076 }
1077
1078 if (!shared || (shared && (group != tegra->group))) {
1079#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
1080 if (client->dev->archdata.mapping) {
1081 struct dma_iommu_mapping *mapping =
1082 to_dma_iommu_mapping(client->dev);
1083 arm_iommu_detach_device(client->dev);
1084 arm_iommu_release_mapping(mapping);
1085 }
1086#endif
1087 err = iommu_attach_group(tegra->domain, group);
1088 if (err < 0) {
1089 iommu_group_put(group);
1090 return ERR_PTR(err);
1091 }
1092
1093 if (shared && !tegra->group)
1094 tegra->group = group;
1095 }
1096 }
1097
1098 return group;
1099}
1100
1101void host1x_client_iommu_detach(struct host1x_client *client,
1102 struct iommu_group *group)
1103{
1104 struct drm_device *drm = dev_get_drvdata(client->parent);
1105 struct tegra_drm *tegra = drm->dev_private;
1106
1107 if (group) {
1108 if (group == tegra->group) {
1109 iommu_detach_group(tegra->domain, group);
1110 tegra->group = NULL;
1111 }
1112
1113 iommu_group_put(group);
1114 }
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
1133
1134
1135
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
1147
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_fb_helper_remove_conflicting_framebuffers(NULL, "tegradrmfb", false);
1207 if (err < 0)
1208 goto put;
1209
1210 err = drm_dev_register(drm, 0);
1211 if (err < 0)
1212 goto put;
1213
1214 return 0;
1215
1216put:
1217 drm_dev_put(drm);
1218 return err;
1219}
1220
1221static int host1x_drm_remove(struct host1x_device *dev)
1222{
1223 struct drm_device *drm = dev_get_drvdata(&dev->dev);
1224
1225 drm_dev_unregister(drm);
1226 drm_dev_put(drm);
1227
1228 return 0;
1229}
1230
1231#ifdef CONFIG_PM_SLEEP
1232static int host1x_drm_suspend(struct device *dev)
1233{
1234 struct drm_device *drm = dev_get_drvdata(dev);
1235
1236 return drm_mode_config_helper_suspend(drm);
1237}
1238
1239static int host1x_drm_resume(struct device *dev)
1240{
1241 struct drm_device *drm = dev_get_drvdata(dev);
1242
1243 return drm_mode_config_helper_resume(drm);
1244}
1245#endif
1246
1247static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1248 host1x_drm_resume);
1249
1250static const struct of_device_id host1x_drm_subdevs[] = {
1251 { .compatible = "nvidia,tegra20-dc", },
1252 { .compatible = "nvidia,tegra20-hdmi", },
1253 { .compatible = "nvidia,tegra20-gr2d", },
1254 { .compatible = "nvidia,tegra20-gr3d", },
1255 { .compatible = "nvidia,tegra30-dc", },
1256 { .compatible = "nvidia,tegra30-hdmi", },
1257 { .compatible = "nvidia,tegra30-gr2d", },
1258 { .compatible = "nvidia,tegra30-gr3d", },
1259 { .compatible = "nvidia,tegra114-dsi", },
1260 { .compatible = "nvidia,tegra114-hdmi", },
1261 { .compatible = "nvidia,tegra114-gr3d", },
1262 { .compatible = "nvidia,tegra124-dc", },
1263 { .compatible = "nvidia,tegra124-sor", },
1264 { .compatible = "nvidia,tegra124-hdmi", },
1265 { .compatible = "nvidia,tegra124-dsi", },
1266 { .compatible = "nvidia,tegra124-vic", },
1267 { .compatible = "nvidia,tegra132-dsi", },
1268 { .compatible = "nvidia,tegra210-dc", },
1269 { .compatible = "nvidia,tegra210-dsi", },
1270 { .compatible = "nvidia,tegra210-sor", },
1271 { .compatible = "nvidia,tegra210-sor1", },
1272 { .compatible = "nvidia,tegra210-vic", },
1273 { .compatible = "nvidia,tegra186-display", },
1274 { .compatible = "nvidia,tegra186-dc", },
1275 { .compatible = "nvidia,tegra186-sor", },
1276 { .compatible = "nvidia,tegra186-sor1", },
1277 { .compatible = "nvidia,tegra186-vic", },
1278 { .compatible = "nvidia,tegra194-display", },
1279 { .compatible = "nvidia,tegra194-dc", },
1280 { .compatible = "nvidia,tegra194-sor", },
1281 { .compatible = "nvidia,tegra194-vic", },
1282 { }
1283};
1284
1285static struct host1x_driver host1x_drm_driver = {
1286 .driver = {
1287 .name = "drm",
1288 .pm = &host1x_drm_pm_ops,
1289 },
1290 .probe = host1x_drm_probe,
1291 .remove = host1x_drm_remove,
1292 .subdevs = host1x_drm_subdevs,
1293};
1294
1295static struct platform_driver * const drivers[] = {
1296 &tegra_display_hub_driver,
1297 &tegra_dc_driver,
1298 &tegra_hdmi_driver,
1299 &tegra_dsi_driver,
1300 &tegra_dpaux_driver,
1301 &tegra_sor_driver,
1302 &tegra_gr2d_driver,
1303 &tegra_gr3d_driver,
1304 &tegra_vic_driver,
1305};
1306
1307static int __init host1x_drm_init(void)
1308{
1309 int err;
1310
1311 err = host1x_driver_register(&host1x_drm_driver);
1312 if (err < 0)
1313 return err;
1314
1315 err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1316 if (err < 0)
1317 goto unregister_host1x;
1318
1319 return 0;
1320
1321unregister_host1x:
1322 host1x_driver_unregister(&host1x_drm_driver);
1323 return err;
1324}
1325module_init(host1x_drm_init);
1326
1327static void __exit host1x_drm_exit(void)
1328{
1329 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1330 host1x_driver_unregister(&host1x_drm_driver);
1331}
1332module_exit(host1x_drm_exit);
1333
1334MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1335MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1336MODULE_LICENSE("GPL v2");
1337
