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drm/msm/hdmi: Enable HPD after HDMI IRQ is set up
[linux/fpc-iii.git] / drivers / gpu / drm / tegra / drm.c
bloba2bd5876c633515950f23be6cdff6f0f49306312
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
31 struct tegra_drm_file {
32 struct idr contexts;
33 struct mutex lock;
34 };
35
36 static 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(drm, state);
42 if (err < 0)
43 return err;
44
45 return tegra_display_hub_atomic_check(drm, state);
46 }
47
48 static const struct drm_mode_config_funcs tegra_drm_mode_config_funcs = {
49 .fb_create = tegra_fb_create,
50 #ifdef CONFIG_DRM_FBDEV_EMULATION
51 .output_poll_changed = drm_fb_helper_output_poll_changed,
52 #endif
53 .atomic_check = tegra_atomic_check,
54 .atomic_commit = drm_atomic_helper_commit,
55 };
56
57 static void tegra_atomic_commit_tail(struct drm_atomic_state *old_state)
58 {
59 struct drm_device *drm = old_state->dev;
60 struct tegra_drm *tegra = drm->dev_private;
61
62 if (tegra->hub) {
63 drm_atomic_helper_commit_modeset_disables(drm, old_state);
64 tegra_display_hub_atomic_commit(drm, old_state);
65 drm_atomic_helper_commit_planes(drm, old_state, 0);
66 drm_atomic_helper_commit_modeset_enables(drm, old_state);
67 drm_atomic_helper_commit_hw_done(old_state);
68 drm_atomic_helper_wait_for_vblanks(drm, old_state);
69 drm_atomic_helper_cleanup_planes(drm, old_state);
70 } else {
71 drm_atomic_helper_commit_tail_rpm(old_state);
72 }
73 }
74
75 static const struct drm_mode_config_helper_funcs
76 tegra_drm_mode_config_helpers = {
77 .atomic_commit_tail = tegra_atomic_commit_tail,
78 };
79
80 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
81 {
82 struct host1x_device *device = to_host1x_device(drm->dev);
83 struct tegra_drm *tegra;
84 int err;
85
86 tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
87 if (!tegra)
88 return -ENOMEM;
89
90 if (iommu_present(&platform_bus_type)) {
91 u64 carveout_start, carveout_end, gem_start, gem_end;
92 struct iommu_domain_geometry *geometry;
93 unsigned long order;
94
95 tegra->domain = iommu_domain_alloc(&platform_bus_type);
96 if (!tegra->domain) {
97 err = -ENOMEM;
98 goto free;
99 }
100
101 err = iova_cache_get();
102 if (err < 0)
103 goto domain;
104
105 geometry = &tegra->domain->geometry;
106 gem_start = geometry->aperture_start;
107 gem_end = geometry->aperture_end - CARVEOUT_SZ;
108 carveout_start = gem_end + 1;
109 carveout_end = geometry->aperture_end;
110
111 order = __ffs(tegra->domain->pgsize_bitmap);
112 init_iova_domain(&tegra->carveout.domain, 1UL << order,
113 carveout_start >> order);
114
115 tegra->carveout.shift = iova_shift(&tegra->carveout.domain);
116 tegra->carveout.limit = carveout_end >> tegra->carveout.shift;
117
118 drm_mm_init(&tegra->mm, gem_start, gem_end - gem_start + 1);
119 mutex_init(&tegra->mm_lock);
120
121 DRM_DEBUG("IOMMU apertures:\n");
122 DRM_DEBUG(" GEM: %#llx-%#llx\n", gem_start, gem_end);
123 DRM_DEBUG(" Carveout: %#llx-%#llx\n", carveout_start,
124 carveout_end);
125 }
126
127 mutex_init(&tegra->clients_lock);
128 INIT_LIST_HEAD(&tegra->clients);
129
130 drm->dev_private = tegra;
131 tegra->drm = drm;
132
133 drm_mode_config_init(drm);
134
135 drm->mode_config.min_width = 0;
136 drm->mode_config.min_height = 0;
137
138 drm->mode_config.max_width = 4096;
139 drm->mode_config.max_height = 4096;
140
141 drm->mode_config.allow_fb_modifiers = true;
142
143 drm->mode_config.normalize_zpos = true;
144
145 drm->mode_config.funcs = &tegra_drm_mode_config_funcs;
146 drm->mode_config.helper_private = &tegra_drm_mode_config_helpers;
147
148 err = tegra_drm_fb_prepare(drm);
149 if (err < 0)
150 goto config;
151
152 drm_kms_helper_poll_init(drm);
153
154 err = host1x_device_init(device);
155 if (err < 0)
156 goto fbdev;
157
158 if (tegra->hub) {
159 err = tegra_display_hub_prepare(tegra->hub);
160 if (err < 0)
161 goto device;
162 }
163
164 /*
165 * We don't use the drm_irq_install() helpers provided by the DRM
166 * core, so we need to set this manually in order to allow the
167 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
168 */
169 drm->irq_enabled = true;
170
171 /* syncpoints are used for full 32-bit hardware VBLANK counters */
172 drm->max_vblank_count = 0xffffffff;
173
174 err = drm_vblank_init(drm, drm->mode_config.num_crtc);
175 if (err < 0)
176 goto hub;
177
178 drm_mode_config_reset(drm);
179
180 err = tegra_drm_fb_init(drm);
181 if (err < 0)
182 goto hub;
183
184 return 0;
185
186 hub:
187 if (tegra->hub)
188 tegra_display_hub_cleanup(tegra->hub);
189 device:
190 host1x_device_exit(device);
191 fbdev:
192 drm_kms_helper_poll_fini(drm);
193 tegra_drm_fb_free(drm);
194 config:
195 drm_mode_config_cleanup(drm);
196
197 if (tegra->domain) {
198 mutex_destroy(&tegra->mm_lock);
199 drm_mm_takedown(&tegra->mm);
200 put_iova_domain(&tegra->carveout.domain);
201 iova_cache_put();
202 }
203 domain:
204 if (tegra->domain)
205 iommu_domain_free(tegra->domain);
206 free:
207 kfree(tegra);
208 return err;
209 }
210
211 static void tegra_drm_unload(struct drm_device *drm)
212 {
213 struct host1x_device *device = to_host1x_device(drm->dev);
214 struct tegra_drm *tegra = drm->dev_private;
215 int err;
216
217 drm_kms_helper_poll_fini(drm);
218 tegra_drm_fb_exit(drm);
219 drm_atomic_helper_shutdown(drm);
220 drm_mode_config_cleanup(drm);
221
222 err = host1x_device_exit(device);
223 if (err < 0)
224 return;
225
226 if (tegra->domain) {
227 mutex_destroy(&tegra->mm_lock);
228 drm_mm_takedown(&tegra->mm);
229 put_iova_domain(&tegra->carveout.domain);
230 iova_cache_put();
231 iommu_domain_free(tegra->domain);
232 }
233
234 kfree(tegra);
235 }
236
237 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
238 {
239 struct tegra_drm_file *fpriv;
240
241 fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
242 if (!fpriv)
243 return -ENOMEM;
244
245 idr_init(&fpriv->contexts);
246 mutex_init(&fpriv->lock);
247 filp->driver_priv = fpriv;
248
249 return 0;
250 }
251
252 static void tegra_drm_context_free(struct tegra_drm_context *context)
253 {
254 context->client->ops->close_channel(context);
255 kfree(context);
256 }
257
258 static struct host1x_bo *
259 host1x_bo_lookup(struct drm_file *file, u32 handle)
260 {
261 struct drm_gem_object *gem;
262 struct tegra_bo *bo;
263
264 gem = drm_gem_object_lookup(file, handle);
265 if (!gem)
266 return NULL;
267
268 bo = to_tegra_bo(gem);
269 return &bo->base;
270 }
271
272 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
273 struct drm_tegra_reloc __user *src,
274 struct drm_device *drm,
275 struct drm_file *file)
276 {
277 u32 cmdbuf, target;
278 int err;
279
280 err = get_user(cmdbuf, &src->cmdbuf.handle);
281 if (err < 0)
282 return err;
283
284 err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
285 if (err < 0)
286 return err;
287
288 err = get_user(target, &src->target.handle);
289 if (err < 0)
290 return err;
291
292 err = get_user(dest->target.offset, &src->target.offset);
293 if (err < 0)
294 return err;
295
296 err = get_user(dest->shift, &src->shift);
297 if (err < 0)
298 return err;
299
300 dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf);
301 if (!dest->cmdbuf.bo)
302 return -ENOENT;
303
304 dest->target.bo = host1x_bo_lookup(file, target);
305 if (!dest->target.bo)
306 return -ENOENT;
307
308 return 0;
309 }
310
311 int tegra_drm_submit(struct tegra_drm_context *context,
312 struct drm_tegra_submit *args, struct drm_device *drm,
313 struct drm_file *file)
314 {
315 struct host1x_client *client = &context->client->base;
316 unsigned int num_cmdbufs = args->num_cmdbufs;
317 unsigned int num_relocs = args->num_relocs;
318 struct drm_tegra_cmdbuf __user *user_cmdbufs;
319 struct drm_tegra_reloc __user *user_relocs;
320 struct drm_tegra_syncpt __user *user_syncpt;
321 struct drm_tegra_syncpt syncpt;
322 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
323 struct drm_gem_object **refs;
324 struct host1x_syncpt *sp;
325 struct host1x_job *job;
326 unsigned int num_refs;
327 int err;
328
329 user_cmdbufs = u64_to_user_ptr(args->cmdbufs);
330 user_relocs = u64_to_user_ptr(args->relocs);
331 user_syncpt = u64_to_user_ptr(args->syncpts);
332
333 /* We don't yet support other than one syncpt_incr struct per submit */
334 if (args->num_syncpts != 1)
335 return -EINVAL;
336
337 /* We don't yet support waitchks */
338 if (args->num_waitchks != 0)
339 return -EINVAL;
340
341 job = host1x_job_alloc(context->channel, args->num_cmdbufs,
342 args->num_relocs);
343 if (!job)
344 return -ENOMEM;
345
346 job->num_relocs = args->num_relocs;
347 job->client = client;
348 job->class = client->class;
349 job->serialize = true;
350
351 /*
352 * Track referenced BOs so that they can be unreferenced after the
353 * submission is complete.
354 */
355 num_refs = num_cmdbufs + num_relocs * 2;
356
357 refs = kmalloc_array(num_refs, sizeof(*refs), GFP_KERNEL);
358 if (!refs) {
359 err = -ENOMEM;
360 goto put;
361 }
362
363 /* reuse as an iterator later */
364 num_refs = 0;
365
366 while (num_cmdbufs) {
367 struct drm_tegra_cmdbuf cmdbuf;
368 struct host1x_bo *bo;
369 struct tegra_bo *obj;
370 u64 offset;
371
372 if (copy_from_user(&cmdbuf, user_cmdbufs, sizeof(cmdbuf))) {
373 err = -EFAULT;
374 goto fail;
375 }
376
377 /*
378 * The maximum number of CDMA gather fetches is 16383, a higher
379 * value means the words count is malformed.
380 */
381 if (cmdbuf.words > CDMA_GATHER_FETCHES_MAX_NB) {
382 err = -EINVAL;
383 goto fail;
384 }
385
386 bo = host1x_bo_lookup(file, cmdbuf.handle);
387 if (!bo) {
388 err = -ENOENT;
389 goto fail;
390 }
391
392 offset = (u64)cmdbuf.offset + (u64)cmdbuf.words * sizeof(u32);
393 obj = host1x_to_tegra_bo(bo);
394 refs[num_refs++] = &obj->gem;
395
396 /*
397 * Gather buffer base address must be 4-bytes aligned,
398 * unaligned offset is malformed and cause commands stream
399 * corruption on the buffer address relocation.
400 */
401 if (offset & 3 || offset > obj->gem.size) {
402 err = -EINVAL;
403 goto fail;
404 }
405
406 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
407 num_cmdbufs--;
408 user_cmdbufs++;
409 }
410
411 /* copy and resolve relocations from submit */
412 while (num_relocs--) {
413 struct host1x_reloc *reloc;
414 struct tegra_bo *obj;
415
416 err = host1x_reloc_copy_from_user(&job->relocs[num_relocs],
417 &user_relocs[num_relocs], drm,
418 file);
419 if (err < 0)
420 goto fail;
421
422 reloc = &job->relocs[num_relocs];
423 obj = host1x_to_tegra_bo(reloc->cmdbuf.bo);
424 refs[num_refs++] = &obj->gem;
425
426 /*
427 * The unaligned cmdbuf offset will cause an unaligned write
428 * during of the relocations patching, corrupting the commands
429 * stream.
430 */
431 if (reloc->cmdbuf.offset & 3 ||
432 reloc->cmdbuf.offset >= obj->gem.size) {
433 err = -EINVAL;
434 goto fail;
435 }
436
437 obj = host1x_to_tegra_bo(reloc->target.bo);
438 refs[num_refs++] = &obj->gem;
439
440 if (reloc->target.offset >= obj->gem.size) {
441 err = -EINVAL;
442 goto fail;
443 }
444 }
445
446 if (copy_from_user(&syncpt, user_syncpt, sizeof(syncpt))) {
447 err = -EFAULT;
448 goto fail;
449 }
450
451 /* check whether syncpoint ID is valid */
452 sp = host1x_syncpt_get(host1x, syncpt.id);
453 if (!sp) {
454 err = -ENOENT;
455 goto fail;
456 }
457
458 job->is_addr_reg = context->client->ops->is_addr_reg;
459 job->is_valid_class = context->client->ops->is_valid_class;
460 job->syncpt_incrs = syncpt.incrs;
461 job->syncpt_id = syncpt.id;
462 job->timeout = 10000;
463
464 if (args->timeout && args->timeout < 10000)
465 job->timeout = args->timeout;
466
467 err = host1x_job_pin(job, context->client->base.dev);
468 if (err)
469 goto fail;
470
471 err = host1x_job_submit(job);
472 if (err) {
473 host1x_job_unpin(job);
474 goto fail;
475 }
476
477 args->fence = job->syncpt_end;
478
479 fail:
480 while (num_refs--)
481 drm_gem_object_put_unlocked(refs[num_refs]);
482
483 kfree(refs);
484
485 put:
486 host1x_job_put(job);
487 return err;
488 }
489
490
491 #ifdef CONFIG_DRM_TEGRA_STAGING
492 static int tegra_gem_create(struct drm_device *drm, void *data,
493 struct drm_file *file)
494 {
495 struct drm_tegra_gem_create *args = data;
496 struct tegra_bo *bo;
497
498 bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
499 &args->handle);
500 if (IS_ERR(bo))
501 return PTR_ERR(bo);
502
503 return 0;
504 }
505
506 static int tegra_gem_mmap(struct drm_device *drm, void *data,
507 struct drm_file *file)
508 {
509 struct drm_tegra_gem_mmap *args = data;
510 struct drm_gem_object *gem;
511 struct tegra_bo *bo;
512
513 gem = drm_gem_object_lookup(file, args->handle);
514 if (!gem)
515 return -EINVAL;
516
517 bo = to_tegra_bo(gem);
518
519 args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
520
521 drm_gem_object_put_unlocked(gem);
522
523 return 0;
524 }
525
526 static int tegra_syncpt_read(struct drm_device *drm, void *data,
527 struct drm_file *file)
528 {
529 struct host1x *host = dev_get_drvdata(drm->dev->parent);
530 struct drm_tegra_syncpt_read *args = data;
531 struct host1x_syncpt *sp;
532
533 sp = host1x_syncpt_get(host, args->id);
534 if (!sp)
535 return -EINVAL;
536
537 args->value = host1x_syncpt_read_min(sp);
538 return 0;
539 }
540
541 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
542 struct drm_file *file)
543 {
544 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
545 struct drm_tegra_syncpt_incr *args = data;
546 struct host1x_syncpt *sp;
547
548 sp = host1x_syncpt_get(host1x, args->id);
549 if (!sp)
550 return -EINVAL;
551
552 return host1x_syncpt_incr(sp);
553 }
554
555 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
556 struct drm_file *file)
557 {
558 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
559 struct drm_tegra_syncpt_wait *args = data;
560 struct host1x_syncpt *sp;
561
562 sp = host1x_syncpt_get(host1x, args->id);
563 if (!sp)
564 return -EINVAL;
565
566 return host1x_syncpt_wait(sp, args->thresh,
567 msecs_to_jiffies(args->timeout),
568 &args->value);
569 }
570
571 static int tegra_client_open(struct tegra_drm_file *fpriv,
572 struct tegra_drm_client *client,
573 struct tegra_drm_context *context)
574 {
575 int err;
576
577 err = client->ops->open_channel(client, context);
578 if (err < 0)
579 return err;
580
581 err = idr_alloc(&fpriv->contexts, context, 1, 0, GFP_KERNEL);
582 if (err < 0) {
583 client->ops->close_channel(context);
584 return err;
585 }
586
587 context->client = client;
588 context->id = err;
589
590 return 0;
591 }
592
593 static int tegra_open_channel(struct drm_device *drm, void *data,
594 struct drm_file *file)
595 {
596 struct tegra_drm_file *fpriv = file->driver_priv;
597 struct tegra_drm *tegra = drm->dev_private;
598 struct drm_tegra_open_channel *args = data;
599 struct tegra_drm_context *context;
600 struct tegra_drm_client *client;
601 int err = -ENODEV;
602
603 context = kzalloc(sizeof(*context), GFP_KERNEL);
604 if (!context)
605 return -ENOMEM;
606
607 mutex_lock(&fpriv->lock);
608
609 list_for_each_entry(client, &tegra->clients, list)
610 if (client->base.class == args->client) {
611 err = tegra_client_open(fpriv, client, context);
612 if (err < 0)
613 break;
614
615 args->context = context->id;
616 break;
617 }
618
619 if (err < 0)
620 kfree(context);
621
622 mutex_unlock(&fpriv->lock);
623 return err;
624 }
625
626 static int tegra_close_channel(struct drm_device *drm, void *data,
627 struct drm_file *file)
628 {
629 struct tegra_drm_file *fpriv = file->driver_priv;
630 struct drm_tegra_close_channel *args = data;
631 struct tegra_drm_context *context;
632 int err = 0;
633
634 mutex_lock(&fpriv->lock);
635
636 context = idr_find(&fpriv->contexts, args->context);
637 if (!context) {
638 err = -EINVAL;
639 goto unlock;
640 }
641
642 idr_remove(&fpriv->contexts, context->id);
643 tegra_drm_context_free(context);
644
645 unlock:
646 mutex_unlock(&fpriv->lock);
647 return err;
648 }
649
650 static int tegra_get_syncpt(struct drm_device *drm, void *data,
651 struct drm_file *file)
652 {
653 struct tegra_drm_file *fpriv = file->driver_priv;
654 struct drm_tegra_get_syncpt *args = data;
655 struct tegra_drm_context *context;
656 struct host1x_syncpt *syncpt;
657 int err = 0;
658
659 mutex_lock(&fpriv->lock);
660
661 context = idr_find(&fpriv->contexts, args->context);
662 if (!context) {
663 err = -ENODEV;
664 goto unlock;
665 }
666
667 if (args->index >= context->client->base.num_syncpts) {
668 err = -EINVAL;
669 goto unlock;
670 }
671
672 syncpt = context->client->base.syncpts[args->index];
673 args->id = host1x_syncpt_id(syncpt);
674
675 unlock:
676 mutex_unlock(&fpriv->lock);
677 return err;
678 }
679
680 static int tegra_submit(struct drm_device *drm, void *data,
681 struct drm_file *file)
682 {
683 struct tegra_drm_file *fpriv = file->driver_priv;
684 struct drm_tegra_submit *args = data;
685 struct tegra_drm_context *context;
686 int err;
687
688 mutex_lock(&fpriv->lock);
689
690 context = idr_find(&fpriv->contexts, args->context);
691 if (!context) {
692 err = -ENODEV;
693 goto unlock;
694 }
695
696 err = context->client->ops->submit(context, args, drm, file);
697
698 unlock:
699 mutex_unlock(&fpriv->lock);
700 return err;
701 }
702
703 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
704 struct drm_file *file)
705 {
706 struct tegra_drm_file *fpriv = file->driver_priv;
707 struct drm_tegra_get_syncpt_base *args = data;
708 struct tegra_drm_context *context;
709 struct host1x_syncpt_base *base;
710 struct host1x_syncpt *syncpt;
711 int err = 0;
712
713 mutex_lock(&fpriv->lock);
714
715 context = idr_find(&fpriv->contexts, args->context);
716 if (!context) {
717 err = -ENODEV;
718 goto unlock;
719 }
720
721 if (args->syncpt >= context->client->base.num_syncpts) {
722 err = -EINVAL;
723 goto unlock;
724 }
725
726 syncpt = context->client->base.syncpts[args->syncpt];
727
728 base = host1x_syncpt_get_base(syncpt);
729 if (!base) {
730 err = -ENXIO;
731 goto unlock;
732 }
733
734 args->id = host1x_syncpt_base_id(base);
735
736 unlock:
737 mutex_unlock(&fpriv->lock);
738 return err;
739 }
740
741 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
742 struct drm_file *file)
743 {
744 struct drm_tegra_gem_set_tiling *args = data;
745 enum tegra_bo_tiling_mode mode;
746 struct drm_gem_object *gem;
747 unsigned long value = 0;
748 struct tegra_bo *bo;
749
750 switch (args->mode) {
751 case DRM_TEGRA_GEM_TILING_MODE_PITCH:
752 mode = TEGRA_BO_TILING_MODE_PITCH;
753
754 if (args->value != 0)
755 return -EINVAL;
756
757 break;
758
759 case DRM_TEGRA_GEM_TILING_MODE_TILED:
760 mode = TEGRA_BO_TILING_MODE_TILED;
761
762 if (args->value != 0)
763 return -EINVAL;
764
765 break;
766
767 case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
768 mode = TEGRA_BO_TILING_MODE_BLOCK;
769
770 if (args->value > 5)
771 return -EINVAL;
772
773 value = args->value;
774 break;
775
776 default:
777 return -EINVAL;
778 }
779
780 gem = drm_gem_object_lookup(file, args->handle);
781 if (!gem)
782 return -ENOENT;
783
784 bo = to_tegra_bo(gem);
785
786 bo->tiling.mode = mode;
787 bo->tiling.value = value;
788
789 drm_gem_object_put_unlocked(gem);
790
791 return 0;
792 }
793
794 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
795 struct drm_file *file)
796 {
797 struct drm_tegra_gem_get_tiling *args = data;
798 struct drm_gem_object *gem;
799 struct tegra_bo *bo;
800 int err = 0;
801
802 gem = drm_gem_object_lookup(file, args->handle);
803 if (!gem)
804 return -ENOENT;
805
806 bo = to_tegra_bo(gem);
807
808 switch (bo->tiling.mode) {
809 case TEGRA_BO_TILING_MODE_PITCH:
810 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
811 args->value = 0;
812 break;
813
814 case TEGRA_BO_TILING_MODE_TILED:
815 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
816 args->value = 0;
817 break;
818
819 case TEGRA_BO_TILING_MODE_BLOCK:
820 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
821 args->value = bo->tiling.value;
822 break;
823
824 default:
825 err = -EINVAL;
826 break;
827 }
828
829 drm_gem_object_put_unlocked(gem);
830
831 return err;
832 }
833
834 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
835 struct drm_file *file)
836 {
837 struct drm_tegra_gem_set_flags *args = data;
838 struct drm_gem_object *gem;
839 struct tegra_bo *bo;
840
841 if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
842 return -EINVAL;
843
844 gem = drm_gem_object_lookup(file, args->handle);
845 if (!gem)
846 return -ENOENT;
847
848 bo = to_tegra_bo(gem);
849 bo->flags = 0;
850
851 if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
852 bo->flags |= TEGRA_BO_BOTTOM_UP;
853
854 drm_gem_object_put_unlocked(gem);
855
856 return 0;
857 }
858
859 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
860 struct drm_file *file)
861 {
862 struct drm_tegra_gem_get_flags *args = data;
863 struct drm_gem_object *gem;
864 struct tegra_bo *bo;
865
866 gem = drm_gem_object_lookup(file, args->handle);
867 if (!gem)
868 return -ENOENT;
869
870 bo = to_tegra_bo(gem);
871 args->flags = 0;
872
873 if (bo->flags & TEGRA_BO_BOTTOM_UP)
874 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
875
876 drm_gem_object_put_unlocked(gem);
877
878 return 0;
879 }
880 #endif
881
882 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
883 #ifdef CONFIG_DRM_TEGRA_STAGING
884 DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create,
885 DRM_UNLOCKED | DRM_RENDER_ALLOW),
886 DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap,
887 DRM_UNLOCKED | DRM_RENDER_ALLOW),
888 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read,
889 DRM_UNLOCKED | DRM_RENDER_ALLOW),
890 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr,
891 DRM_UNLOCKED | DRM_RENDER_ALLOW),
892 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait,
893 DRM_UNLOCKED | DRM_RENDER_ALLOW),
894 DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel,
895 DRM_UNLOCKED | DRM_RENDER_ALLOW),
896 DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel,
897 DRM_UNLOCKED | DRM_RENDER_ALLOW),
898 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt,
899 DRM_UNLOCKED | DRM_RENDER_ALLOW),
900 DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit,
901 DRM_UNLOCKED | DRM_RENDER_ALLOW),
902 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base,
903 DRM_UNLOCKED | DRM_RENDER_ALLOW),
904 DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling,
905 DRM_UNLOCKED | DRM_RENDER_ALLOW),
906 DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling,
907 DRM_UNLOCKED | DRM_RENDER_ALLOW),
908 DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags,
909 DRM_UNLOCKED | DRM_RENDER_ALLOW),
910 DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags,
911 DRM_UNLOCKED | DRM_RENDER_ALLOW),
912 #endif
913 };
914
915 static const struct file_operations tegra_drm_fops = {
916 .owner = THIS_MODULE,
917 .open = drm_open,
918 .release = drm_release,
919 .unlocked_ioctl = drm_ioctl,
920 .mmap = tegra_drm_mmap,
921 .poll = drm_poll,
922 .read = drm_read,
923 .compat_ioctl = drm_compat_ioctl,
924 .llseek = noop_llseek,
925 };
926
927 static int tegra_drm_context_cleanup(int id, void *p, void *data)
928 {
929 struct tegra_drm_context *context = p;
930
931 tegra_drm_context_free(context);
932
933 return 0;
934 }
935
936 static void tegra_drm_postclose(struct drm_device *drm, struct drm_file *file)
937 {
938 struct tegra_drm_file *fpriv = file->driver_priv;
939
940 mutex_lock(&fpriv->lock);
941 idr_for_each(&fpriv->contexts, tegra_drm_context_cleanup, NULL);
942 mutex_unlock(&fpriv->lock);
943
944 idr_destroy(&fpriv->contexts);
945 mutex_destroy(&fpriv->lock);
946 kfree(fpriv);
947 }
948
949 #ifdef CONFIG_DEBUG_FS
950 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
951 {
952 struct drm_info_node *node = (struct drm_info_node *)s->private;
953 struct drm_device *drm = node->minor->dev;
954 struct drm_framebuffer *fb;
955
956 mutex_lock(&drm->mode_config.fb_lock);
957
958 list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
959 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
960 fb->base.id, fb->width, fb->height,
961 fb->format->depth,
962 fb->format->cpp[0] * 8,
963 drm_framebuffer_read_refcount(fb));
964 }
965
966 mutex_unlock(&drm->mode_config.fb_lock);
967
968 return 0;
969 }
970
971 static int tegra_debugfs_iova(struct seq_file *s, void *data)
972 {
973 struct drm_info_node *node = (struct drm_info_node *)s->private;
974 struct drm_device *drm = node->minor->dev;
975 struct tegra_drm *tegra = drm->dev_private;
976 struct drm_printer p = drm_seq_file_printer(s);
977
978 if (tegra->domain) {
979 mutex_lock(&tegra->mm_lock);
980 drm_mm_print(&tegra->mm, &p);
981 mutex_unlock(&tegra->mm_lock);
982 }
983
984 return 0;
985 }
986
987 static struct drm_info_list tegra_debugfs_list[] = {
988 { "framebuffers", tegra_debugfs_framebuffers, 0 },
989 { "iova", tegra_debugfs_iova, 0 },
990 };
991
992 static int tegra_debugfs_init(struct drm_minor *minor)
993 {
994 return drm_debugfs_create_files(tegra_debugfs_list,
995 ARRAY_SIZE(tegra_debugfs_list),
996 minor->debugfs_root, minor);
997 }
998 #endif
999
1000 static struct drm_driver tegra_drm_driver = {
1001 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
1002 DRIVER_ATOMIC | DRIVER_RENDER,
1003 .load = tegra_drm_load,
1004 .unload = tegra_drm_unload,
1005 .open = tegra_drm_open,
1006 .postclose = tegra_drm_postclose,
1007 .lastclose = drm_fb_helper_lastclose,
1008
1009 #if defined(CONFIG_DEBUG_FS)
1010 .debugfs_init = tegra_debugfs_init,
1011 #endif
1012
1013 .gem_free_object_unlocked = tegra_bo_free_object,
1014 .gem_vm_ops = &tegra_bo_vm_ops,
1015
1016 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
1017 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
1018 .gem_prime_export = tegra_gem_prime_export,
1019 .gem_prime_import = tegra_gem_prime_import,
1020
1021 .dumb_create = tegra_bo_dumb_create,
1022
1023 .ioctls = tegra_drm_ioctls,
1024 .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
1025 .fops = &tegra_drm_fops,
1026
1027 .name = DRIVER_NAME,
1028 .desc = DRIVER_DESC,
1029 .date = DRIVER_DATE,
1030 .major = DRIVER_MAJOR,
1031 .minor = DRIVER_MINOR,
1032 .patchlevel = DRIVER_PATCHLEVEL,
1033 };
1034
1035 int tegra_drm_register_client(struct tegra_drm *tegra,
1036 struct tegra_drm_client *client)
1037 {
1038 mutex_lock(&tegra->clients_lock);
1039 list_add_tail(&client->list, &tegra->clients);
1040 mutex_unlock(&tegra->clients_lock);
1041
1042 return 0;
1043 }
1044
1045 int tegra_drm_unregister_client(struct tegra_drm *tegra,
1046 struct tegra_drm_client *client)
1047 {
1048 mutex_lock(&tegra->clients_lock);
1049 list_del_init(&client->list);
1050 mutex_unlock(&tegra->clients_lock);
1051
1052 return 0;
1053 }
1054
1055 struct iommu_group *host1x_client_iommu_attach(struct host1x_client *client,
1056 bool shared)
1057 {
1058 struct drm_device *drm = dev_get_drvdata(client->parent);
1059 struct tegra_drm *tegra = drm->dev_private;
1060 struct iommu_group *group = NULL;
1061 int err;
1062
1063 if (tegra->domain) {
1064 group = iommu_group_get(client->dev);
1065 if (!group) {
1066 dev_err(client->dev, "failed to get IOMMU group\n");
1067 return ERR_PTR(-ENODEV);
1068 }
1069
1070 if (!shared || (shared && (group != tegra->group))) {
1071 err = iommu_attach_group(tegra->domain, group);
1072 if (err < 0) {
1073 iommu_group_put(group);
1074 return ERR_PTR(err);
1075 }
1076
1077 if (shared && !tegra->group)
1078 tegra->group = group;
1079 }
1080 }
1081
1082 return group;
1083 }
1084
1085 void host1x_client_iommu_detach(struct host1x_client *client,
1086 struct iommu_group *group)
1087 {
1088 struct drm_device *drm = dev_get_drvdata(client->parent);
1089 struct tegra_drm *tegra = drm->dev_private;
1090
1091 if (group) {
1092 if (group == tegra->group) {
1093 iommu_detach_group(tegra->domain, group);
1094 tegra->group = NULL;
1095 }
1096
1097 iommu_group_put(group);
1098 }
1099 }
1100
1101 void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *dma)
1102 {
1103 struct iova *alloc;
1104 void *virt;
1105 gfp_t gfp;
1106 int err;
1107
1108 if (tegra->domain)
1109 size = iova_align(&tegra->carveout.domain, size);
1110 else
1111 size = PAGE_ALIGN(size);
1112
1113 gfp = GFP_KERNEL | __GFP_ZERO;
1114 if (!tegra->domain) {
1115 /*
1116 * Many units only support 32-bit addresses, even on 64-bit
1117 * SoCs. If there is no IOMMU to translate into a 32-bit IO
1118 * virtual address space, force allocations to be in the
1119 * lower 32-bit range.
1120 */
1121 gfp |= GFP_DMA;
1122 }
1123
1124 virt = (void *)__get_free_pages(gfp, get_order(size));
1125 if (!virt)
1126 return ERR_PTR(-ENOMEM);
1127
1128 if (!tegra->domain) {
1129 /*
1130 * If IOMMU is disabled, devices address physical memory
1131 * directly.
1132 */
1133 *dma = virt_to_phys(virt);
1134 return virt;
1135 }
1136
1137 alloc = alloc_iova(&tegra->carveout.domain,
1138 size >> tegra->carveout.shift,
1139 tegra->carveout.limit, true);
1140 if (!alloc) {
1141 err = -EBUSY;
1142 goto free_pages;
1143 }
1144
1145 *dma = iova_dma_addr(&tegra->carveout.domain, alloc);
1146 err = iommu_map(tegra->domain, *dma, virt_to_phys(virt),
1147 size, IOMMU_READ | IOMMU_WRITE);
1148 if (err < 0)
1149 goto free_iova;
1150
1151 return virt;
1152
1153 free_iova:
1154 __free_iova(&tegra->carveout.domain, alloc);
1155 free_pages:
1156 free_pages((unsigned long)virt, get_order(size));
1157
1158 return ERR_PTR(err);
1159 }
1160
1161 void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
1162 dma_addr_t dma)
1163 {
1164 if (tegra->domain)
1165 size = iova_align(&tegra->carveout.domain, size);
1166 else
1167 size = PAGE_ALIGN(size);
1168
1169 if (tegra->domain) {
1170 iommu_unmap(tegra->domain, dma, size);
1171 free_iova(&tegra->carveout.domain,
1172 iova_pfn(&tegra->carveout.domain, dma));
1173 }
1174
1175 free_pages((unsigned long)virt, get_order(size));
1176 }
1177
1178 static int host1x_drm_probe(struct host1x_device *dev)
1179 {
1180 struct drm_driver *driver = &tegra_drm_driver;
1181 struct drm_device *drm;
1182 int err;
1183
1184 drm = drm_dev_alloc(driver, &dev->dev);
1185 if (IS_ERR(drm))
1186 return PTR_ERR(drm);
1187
1188 dev_set_drvdata(&dev->dev, drm);
1189
1190 err = drm_dev_register(drm, 0);
1191 if (err < 0)
1192 goto unref;
1193
1194 return 0;
1195
1196 unref:
1197 drm_dev_unref(drm);
1198 return err;
1199 }
1200
1201 static int host1x_drm_remove(struct host1x_device *dev)
1202 {
1203 struct drm_device *drm = dev_get_drvdata(&dev->dev);
1204
1205 drm_dev_unregister(drm);
1206 drm_dev_unref(drm);
1207
1208 return 0;
1209 }
1210
1211 #ifdef CONFIG_PM_SLEEP
1212 static int host1x_drm_suspend(struct device *dev)
1213 {
1214 struct drm_device *drm = dev_get_drvdata(dev);
1215 struct tegra_drm *tegra = drm->dev_private;
1216
1217 drm_kms_helper_poll_disable(drm);
1218 tegra_drm_fb_suspend(drm);
1219
1220 tegra->state = drm_atomic_helper_suspend(drm);
1221 if (IS_ERR(tegra->state)) {
1222 tegra_drm_fb_resume(drm);
1223 drm_kms_helper_poll_enable(drm);
1224 return PTR_ERR(tegra->state);
1225 }
1226
1227 return 0;
1228 }
1229
1230 static int host1x_drm_resume(struct device *dev)
1231 {
1232 struct drm_device *drm = dev_get_drvdata(dev);
1233 struct tegra_drm *tegra = drm->dev_private;
1234
1235 drm_atomic_helper_resume(drm, tegra->state);
1236 tegra_drm_fb_resume(drm);
1237 drm_kms_helper_poll_enable(drm);
1238
1239 return 0;
1240 }
1241 #endif
1242
1243 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1244 host1x_drm_resume);
1245
1246 static const struct of_device_id host1x_drm_subdevs[] = {
1247 { .compatible = "nvidia,tegra20-dc", },
1248 { .compatible = "nvidia,tegra20-hdmi", },
1249 { .compatible = "nvidia,tegra20-gr2d", },
1250 { .compatible = "nvidia,tegra20-gr3d", },
1251 { .compatible = "nvidia,tegra30-dc", },
1252 { .compatible = "nvidia,tegra30-hdmi", },
1253 { .compatible = "nvidia,tegra30-gr2d", },
1254 { .compatible = "nvidia,tegra30-gr3d", },
1255 { .compatible = "nvidia,tegra114-dsi", },
1256 { .compatible = "nvidia,tegra114-hdmi", },
1257 { .compatible = "nvidia,tegra114-gr3d", },
1258 { .compatible = "nvidia,tegra124-dc", },
1259 { .compatible = "nvidia,tegra124-sor", },
1260 { .compatible = "nvidia,tegra124-hdmi", },
1261 { .compatible = "nvidia,tegra124-dsi", },
1262 { .compatible = "nvidia,tegra124-vic", },
1263 { .compatible = "nvidia,tegra132-dsi", },
1264 { .compatible = "nvidia,tegra210-dc", },
1265 { .compatible = "nvidia,tegra210-dsi", },
1266 { .compatible = "nvidia,tegra210-sor", },
1267 { .compatible = "nvidia,tegra210-sor1", },
1268 { .compatible = "nvidia,tegra210-vic", },
1269 { .compatible = "nvidia,tegra186-display", },
1270 { .compatible = "nvidia,tegra186-dc", },
1271 { .compatible = "nvidia,tegra186-sor", },
1272 { .compatible = "nvidia,tegra186-sor1", },
1273 { .compatible = "nvidia,tegra186-vic", },
1274 { /* sentinel */ }
1275 };
1276
1277 static struct host1x_driver host1x_drm_driver = {
1278 .driver = {
1279 .name = "drm",
1280 .pm = &host1x_drm_pm_ops,
1281 },
1282 .probe = host1x_drm_probe,
1283 .remove = host1x_drm_remove,
1284 .subdevs = host1x_drm_subdevs,
1285 };
1286
1287 static struct platform_driver * const drivers[] = {
1288 &tegra_display_hub_driver,
1289 &tegra_dc_driver,
1290 &tegra_hdmi_driver,
1291 &tegra_dsi_driver,
1292 &tegra_dpaux_driver,
1293 &tegra_sor_driver,
1294 &tegra_gr2d_driver,
1295 &tegra_gr3d_driver,
1296 &tegra_vic_driver,
1297 };
1298
1299 static int __init host1x_drm_init(void)
1300 {
1301 int err;
1302
1303 err = host1x_driver_register(&host1x_drm_driver);
1304 if (err < 0)
1305 return err;
1306
1307 err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1308 if (err < 0)
1309 goto unregister_host1x;
1310
1311 return 0;
1312
1313 unregister_host1x:
1314 host1x_driver_unregister(&host1x_drm_driver);
1315 return err;
1316 }
1317 module_init(host1x_drm_init);
1318
1319 static void __exit host1x_drm_exit(void)
1320 {
1321 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1322 host1x_driver_unregister(&host1x_drm_driver);
1323 }
1324 module_exit(host1x_drm_exit);
1325
1326 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1327 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1328 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support