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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Avionic Design GmbH
4 * Copyright (C) 2012-2016 NVIDIA CORPORATION. All rights reserved.
5 */
6
7#include <linux/bitops.h>
8#include <linux/host1x.h>
9#include <linux/idr.h>
10#include <linux/iommu.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13
14#include <drm/drm_atomic.h>
15#include <drm/drm_atomic_helper.h>
16#include <drm/drm_debugfs.h>
17#include <drm/drm_drv.h>
18#include <drm/drm_fourcc.h>
19#include <drm/drm_ioctl.h>
20#include <drm/drm_prime.h>
21#include <drm/drm_vblank.h>
22
23#include "drm.h"
24#include "gem.h"
25
26#define DRIVER_NAME "tegra"
27#define DRIVER_DESC "NVIDIA Tegra graphics"
28#define DRIVER_DATE "20120330"
29#define DRIVER_MAJOR 0
30#define DRIVER_MINOR 0
31#define DRIVER_PATCHLEVEL 0
32
33#define CARVEOUT_SZ SZ_64M
34#define CDMA_GATHER_FETCHES_MAX_NB 16383
35
36struct tegra_drm_file {
37 struct idr contexts;
38 struct mutex lock;
39};
40
41static int tegra_atomic_check(struct drm_device *drm,
42 struct drm_atomic_state *state)
43{
44 int err;
45
46 err = drm_atomic_helper_check(drm, state);
47 if (err < 0)
48 return err;
49
50 return tegra_display_hub_atomic_check(drm, state);
51}
52
53static const struct drm_mode_config_funcs tegra_drm_mode_config_funcs = {
54 .fb_create = tegra_fb_create,
55#ifdef CONFIG_DRM_FBDEV_EMULATION
56 .output_poll_changed = drm_fb_helper_output_poll_changed,
57#endif
58 .atomic_check = tegra_atomic_check,
59 .atomic_commit = drm_atomic_helper_commit,
60};
61
62static void tegra_atomic_commit_tail(struct drm_atomic_state *old_state)
63{
64 struct drm_device *drm = old_state->dev;
65 struct tegra_drm *tegra = drm->dev_private;
66
67 if (tegra->hub) {
68 drm_atomic_helper_commit_modeset_disables(drm, old_state);
69 tegra_display_hub_atomic_commit(drm, old_state);
70 drm_atomic_helper_commit_planes(drm, old_state, 0);
71 drm_atomic_helper_commit_modeset_enables(drm, old_state);
72 drm_atomic_helper_commit_hw_done(old_state);
73 drm_atomic_helper_wait_for_vblanks(drm, old_state);
74 drm_atomic_helper_cleanup_planes(drm, old_state);
75 } else {
76 drm_atomic_helper_commit_tail_rpm(old_state);
77 }
78}
79
80static const struct drm_mode_config_helper_funcs
81tegra_drm_mode_config_helpers = {
82 .atomic_commit_tail = tegra_atomic_commit_tail,
83};
84
85static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
86{
87 struct tegra_drm_file *fpriv;
88
89 fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
90 if (!fpriv)
91 return -ENOMEM;
92
93 idr_init(&fpriv->contexts);
94 mutex_init(&fpriv->lock);
95 filp->driver_priv = fpriv;
96
97 return 0;
98}
99
100static void tegra_drm_context_free(struct tegra_drm_context *context)
101{
102 context->client->ops->close_channel(context);
103 kfree(context);
104}
105
106static struct host1x_bo *
107host1x_bo_lookup(struct drm_file *file, u32 handle)
108{
109 struct drm_gem_object *gem;
110 struct tegra_bo *bo;
111
112 gem = drm_gem_object_lookup(file, handle);
113 if (!gem)
114 return NULL;
115
116 bo = to_tegra_bo(gem);
117 return &bo->base;
118}
119
120static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
121 struct drm_tegra_reloc __user *src,
122 struct drm_device *drm,
123 struct drm_file *file)
124{
125 u32 cmdbuf, target;
126 int err;
127
128 err = get_user(cmdbuf, &src->cmdbuf.handle);
129 if (err < 0)
130 return err;
131
132 err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
133 if (err < 0)
134 return err;
135
136 err = get_user(target, &src->target.handle);
137 if (err < 0)
138 return err;
139
140 err = get_user(dest->target.offset, &src->target.offset);
141 if (err < 0)
142 return err;
143
144 err = get_user(dest->shift, &src->shift);
145 if (err < 0)
146 return err;
147
148 dest->flags = HOST1X_RELOC_READ | HOST1X_RELOC_WRITE;
149
150 dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf);
151 if (!dest->cmdbuf.bo)
152 return -ENOENT;
153
154 dest->target.bo = host1x_bo_lookup(file, target);
155 if (!dest->target.bo)
156 return -ENOENT;
157
158 return 0;
159}
160
161int tegra_drm_submit(struct tegra_drm_context *context,
162 struct drm_tegra_submit *args, struct drm_device *drm,
163 struct drm_file *file)
164{
165 struct host1x_client *client = &context->client->base;
166 unsigned int num_cmdbufs = args->num_cmdbufs;
167 unsigned int num_relocs = args->num_relocs;
168 struct drm_tegra_cmdbuf __user *user_cmdbufs;
169 struct drm_tegra_reloc __user *user_relocs;
170 struct drm_tegra_syncpt __user *user_syncpt;
171 struct drm_tegra_syncpt syncpt;
172 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
173 struct drm_gem_object **refs;
174 struct host1x_syncpt *sp;
175 struct host1x_job *job;
176 unsigned int num_refs;
177 int err;
178
179 user_cmdbufs = u64_to_user_ptr(args->cmdbufs);
180 user_relocs = u64_to_user_ptr(args->relocs);
181 user_syncpt = u64_to_user_ptr(args->syncpts);
182
183 /* We don't yet support other than one syncpt_incr struct per submit */
184 if (args->num_syncpts != 1)
185 return -EINVAL;
186
187 /* We don't yet support waitchks */
188 if (args->num_waitchks != 0)
189 return -EINVAL;
190
191 job = host1x_job_alloc(context->channel, args->num_cmdbufs,
192 args->num_relocs);
193 if (!job)
194 return -ENOMEM;
195
196 job->num_relocs = args->num_relocs;
197 job->client = client;
198 job->class = client->class;
199 job->serialize = true;
200
201 /*
202 * Track referenced BOs so that they can be unreferenced after the
203 * submission is complete.
204 */
205 num_refs = num_cmdbufs + num_relocs * 2;
206
207 refs = kmalloc_array(num_refs, sizeof(*refs), GFP_KERNEL);
208 if (!refs) {
209 err = -ENOMEM;
210 goto put;
211 }
212
213 /* reuse as an iterator later */
214 num_refs = 0;
215
216 while (num_cmdbufs) {
217 struct drm_tegra_cmdbuf cmdbuf;
218 struct host1x_bo *bo;
219 struct tegra_bo *obj;
220 u64 offset;
221
222 if (copy_from_user(&cmdbuf, user_cmdbufs, sizeof(cmdbuf))) {
223 err = -EFAULT;
224 goto fail;
225 }
226
227 /*
228 * The maximum number of CDMA gather fetches is 16383, a higher
229 * value means the words count is malformed.
230 */
231 if (cmdbuf.words > CDMA_GATHER_FETCHES_MAX_NB) {
232 err = -EINVAL;
233 goto fail;
234 }
235
236 bo = host1x_bo_lookup(file, cmdbuf.handle);
237 if (!bo) {
238 err = -ENOENT;
239 goto fail;
240 }
241
242 offset = (u64)cmdbuf.offset + (u64)cmdbuf.words * sizeof(u32);
243 obj = host1x_to_tegra_bo(bo);
244 refs[num_refs++] = &obj->gem;
245
246 /*
247 * Gather buffer base address must be 4-bytes aligned,
248 * unaligned offset is malformed and cause commands stream
249 * corruption on the buffer address relocation.
250 */
251 if (offset & 3 || offset > obj->gem.size) {
252 err = -EINVAL;
253 goto fail;
254 }
255
256 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
257 num_cmdbufs--;
258 user_cmdbufs++;
259 }
260
261 /* copy and resolve relocations from submit */
262 while (num_relocs--) {
263 struct host1x_reloc *reloc;
264 struct tegra_bo *obj;
265
266 err = host1x_reloc_copy_from_user(&job->relocs[num_relocs],
267 &user_relocs[num_relocs], drm,
268 file);
269 if (err < 0)
270 goto fail;
271
272 reloc = &job->relocs[num_relocs];
273 obj = host1x_to_tegra_bo(reloc->cmdbuf.bo);
274 refs[num_refs++] = &obj->gem;
275
276 /*
277 * The unaligned cmdbuf offset will cause an unaligned write
278 * during of the relocations patching, corrupting the commands
279 * stream.
280 */
281 if (reloc->cmdbuf.offset & 3 ||
282 reloc->cmdbuf.offset >= obj->gem.size) {
283 err = -EINVAL;
284 goto fail;
285 }
286
287 obj = host1x_to_tegra_bo(reloc->target.bo);
288 refs[num_refs++] = &obj->gem;
289
290 if (reloc->target.offset >= obj->gem.size) {
291 err = -EINVAL;
292 goto fail;
293 }
294 }
295
296 if (copy_from_user(&syncpt, user_syncpt, sizeof(syncpt))) {
297 err = -EFAULT;
298 goto fail;
299 }
300
301 /* check whether syncpoint ID is valid */
302 sp = host1x_syncpt_get(host1x, syncpt.id);
303 if (!sp) {
304 err = -ENOENT;
305 goto fail;
306 }
307
308 job->is_addr_reg = context->client->ops->is_addr_reg;
309 job->is_valid_class = context->client->ops->is_valid_class;
310 job->syncpt_incrs = syncpt.incrs;
311 job->syncpt_id = syncpt.id;
312 job->timeout = 10000;
313
314 if (args->timeout && args->timeout < 10000)
315 job->timeout = args->timeout;
316
317 err = host1x_job_pin(job, context->client->base.dev);
318 if (err)
319 goto fail;
320
321 err = host1x_job_submit(job);
322 if (err) {
323 host1x_job_unpin(job);
324 goto fail;
325 }
326
327 args->fence = job->syncpt_end;
328
329fail:
330 while (num_refs--)
331 drm_gem_object_put(refs[num_refs]);
332
333 kfree(refs);
334
335put:
336 host1x_job_put(job);
337 return err;
338}
339
340
341#ifdef CONFIG_DRM_TEGRA_STAGING
342static int tegra_gem_create(struct drm_device *drm, void *data,
343 struct drm_file *file)
344{
345 struct drm_tegra_gem_create *args = data;
346 struct tegra_bo *bo;
347
348 bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
349 &args->handle);
350 if (IS_ERR(bo))
351 return PTR_ERR(bo);
352
353 return 0;
354}
355
356static int tegra_gem_mmap(struct drm_device *drm, void *data,
357 struct drm_file *file)
358{
359 struct drm_tegra_gem_mmap *args = data;
360 struct drm_gem_object *gem;
361 struct tegra_bo *bo;
362
363 gem = drm_gem_object_lookup(file, args->handle);
364 if (!gem)
365 return -EINVAL;
366
367 bo = to_tegra_bo(gem);
368
369 args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
370
371 drm_gem_object_put(gem);
372
373 return 0;
374}
375
376static int tegra_syncpt_read(struct drm_device *drm, void *data,
377 struct drm_file *file)
378{
379 struct host1x *host = dev_get_drvdata(drm->dev->parent);
380 struct drm_tegra_syncpt_read *args = data;
381 struct host1x_syncpt *sp;
382
383 sp = host1x_syncpt_get(host, args->id);
384 if (!sp)
385 return -EINVAL;
386
387 args->value = host1x_syncpt_read_min(sp);
388 return 0;
389}
390
391static int tegra_syncpt_incr(struct drm_device *drm, void *data,
392 struct drm_file *file)
393{
394 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
395 struct drm_tegra_syncpt_incr *args = data;
396 struct host1x_syncpt *sp;
397
398 sp = host1x_syncpt_get(host1x, args->id);
399 if (!sp)
400 return -EINVAL;
401
402 return host1x_syncpt_incr(sp);
403}
404
405static int tegra_syncpt_wait(struct drm_device *drm, void *data,
406 struct drm_file *file)
407{
408 struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
409 struct drm_tegra_syncpt_wait *args = data;
410 struct host1x_syncpt *sp;
411
412 sp = host1x_syncpt_get(host1x, args->id);
413 if (!sp)
414 return -EINVAL;
415
416 return host1x_syncpt_wait(sp, args->thresh,
417 msecs_to_jiffies(args->timeout),
418 &args->value);
419}
420
421static int tegra_client_open(struct tegra_drm_file *fpriv,
422 struct tegra_drm_client *client,
423 struct tegra_drm_context *context)
424{
425 int err;
426
427 err = client->ops->open_channel(client, context);
428 if (err < 0)
429 return err;
430
431 err = idr_alloc(&fpriv->contexts, context, 1, 0, GFP_KERNEL);
432 if (err < 0) {
433 client->ops->close_channel(context);
434 return err;
435 }
436
437 context->client = client;
438 context->id = err;
439
440 return 0;
441}
442
443static int tegra_open_channel(struct drm_device *drm, void *data,
444 struct drm_file *file)
445{
446 struct tegra_drm_file *fpriv = file->driver_priv;
447 struct tegra_drm *tegra = drm->dev_private;
448 struct drm_tegra_open_channel *args = data;
449 struct tegra_drm_context *context;
450 struct tegra_drm_client *client;
451 int err = -ENODEV;
452
453 context = kzalloc(sizeof(*context), GFP_KERNEL);
454 if (!context)
455 return -ENOMEM;
456
457 mutex_lock(&fpriv->lock);
458
459 list_for_each_entry(client, &tegra->clients, list)
460 if (client->base.class == args->client) {
461 err = tegra_client_open(fpriv, client, context);
462 if (err < 0)
463 break;
464
465 args->context = context->id;
466 break;
467 }
468
469 if (err < 0)
470 kfree(context);
471
472 mutex_unlock(&fpriv->lock);
473 return err;
474}
475
476static int tegra_close_channel(struct drm_device *drm, void *data,
477 struct drm_file *file)
478{
479 struct tegra_drm_file *fpriv = file->driver_priv;
480 struct drm_tegra_close_channel *args = data;
481 struct tegra_drm_context *context;
482 int err = 0;
483
484 mutex_lock(&fpriv->lock);
485
486 context = idr_find(&fpriv->contexts, args->context);
487 if (!context) {
488 err = -EINVAL;
489 goto unlock;
490 }
491
492 idr_remove(&fpriv->contexts, context->id);
493 tegra_drm_context_free(context);
494
495unlock:
496 mutex_unlock(&fpriv->lock);
497 return err;
498}
499
500static int tegra_get_syncpt(struct drm_device *drm, void *data,
501 struct drm_file *file)
502{
503 struct tegra_drm_file *fpriv = file->driver_priv;
504 struct drm_tegra_get_syncpt *args = data;
505 struct tegra_drm_context *context;
506 struct host1x_syncpt *syncpt;
507 int err = 0;
508
509 mutex_lock(&fpriv->lock);
510
511 context = idr_find(&fpriv->contexts, args->context);
512 if (!context) {
513 err = -ENODEV;
514 goto unlock;
515 }
516
517 if (args->index >= context->client->base.num_syncpts) {
518 err = -EINVAL;
519 goto unlock;
520 }
521
522 syncpt = context->client->base.syncpts[args->index];
523 args->id = host1x_syncpt_id(syncpt);
524
525unlock:
526 mutex_unlock(&fpriv->lock);
527 return err;
528}
529
530static int tegra_submit(struct drm_device *drm, void *data,
531 struct drm_file *file)
532{
533 struct tegra_drm_file *fpriv = file->driver_priv;
534 struct drm_tegra_submit *args = data;
535 struct tegra_drm_context *context;
536 int err;
537
538 mutex_lock(&fpriv->lock);
539
540 context = idr_find(&fpriv->contexts, args->context);
541 if (!context) {
542 err = -ENODEV;
543 goto unlock;
544 }
545
546 err = context->client->ops->submit(context, args, drm, file);
547
548unlock:
549 mutex_unlock(&fpriv->lock);
550 return err;
551}
552
553static int tegra_get_syncpt_base(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_get_syncpt_base *args = data;
558 struct tegra_drm_context *context;
559 struct host1x_syncpt_base *base;
560 struct host1x_syncpt *syncpt;
561 int err = 0;
562
563 mutex_lock(&fpriv->lock);
564
565 context = idr_find(&fpriv->contexts, args->context);
566 if (!context) {
567 err = -ENODEV;
568 goto unlock;
569 }
570
571 if (args->syncpt >= context->client->base.num_syncpts) {
572 err = -EINVAL;
573 goto unlock;
574 }
575
576 syncpt = context->client->base.syncpts[args->syncpt];
577
578 base = host1x_syncpt_get_base(syncpt);
579 if (!base) {
580 err = -ENXIO;
581 goto unlock;
582 }
583
584 args->id = host1x_syncpt_base_id(base);
585
586unlock:
587 mutex_unlock(&fpriv->lock);
588 return err;
589}
590
591static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
592 struct drm_file *file)
593{
594 struct drm_tegra_gem_set_tiling *args = data;
595 enum tegra_bo_tiling_mode mode;
596 struct drm_gem_object *gem;
597 unsigned long value = 0;
598 struct tegra_bo *bo;
599
600 switch (args->mode) {
601 case DRM_TEGRA_GEM_TILING_MODE_PITCH:
602 mode = TEGRA_BO_TILING_MODE_PITCH;
603
604 if (args->value != 0)
605 return -EINVAL;
606
607 break;
608
609 case DRM_TEGRA_GEM_TILING_MODE_TILED:
610 mode = TEGRA_BO_TILING_MODE_TILED;
611
612 if (args->value != 0)
613 return -EINVAL;
614
615 break;
616
617 case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
618 mode = TEGRA_BO_TILING_MODE_BLOCK;
619
620 if (args->value > 5)
621 return -EINVAL;
622
623 value = args->value;
624 break;
625
626 default:
627 return -EINVAL;
628 }
629
630 gem = drm_gem_object_lookup(file, args->handle);
631 if (!gem)
632 return -ENOENT;
633
634 bo = to_tegra_bo(gem);
635
636 bo->tiling.mode = mode;
637 bo->tiling.value = value;
638
639 drm_gem_object_put(gem);
640
641 return 0;
642}
643
644static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
645 struct drm_file *file)
646{
647 struct drm_tegra_gem_get_tiling *args = data;
648 struct drm_gem_object *gem;
649 struct tegra_bo *bo;
650 int err = 0;
651
652 gem = drm_gem_object_lookup(file, args->handle);
653 if (!gem)
654 return -ENOENT;
655
656 bo = to_tegra_bo(gem);
657
658 switch (bo->tiling.mode) {
659 case TEGRA_BO_TILING_MODE_PITCH:
660 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
661 args->value = 0;
662 break;
663
664 case TEGRA_BO_TILING_MODE_TILED:
665 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
666 args->value = 0;
667 break;
668
669 case TEGRA_BO_TILING_MODE_BLOCK:
670 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
671 args->value = bo->tiling.value;
672 break;
673
674 default:
675 err = -EINVAL;
676 break;
677 }
678
679 drm_gem_object_put(gem);
680
681 return err;
682}
683
684static int tegra_gem_set_flags(struct drm_device *drm, void *data,
685 struct drm_file *file)
686{
687 struct drm_tegra_gem_set_flags *args = data;
688 struct drm_gem_object *gem;
689 struct tegra_bo *bo;
690
691 if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
692 return -EINVAL;
693
694 gem = drm_gem_object_lookup(file, args->handle);
695 if (!gem)
696 return -ENOENT;
697
698 bo = to_tegra_bo(gem);
699 bo->flags = 0;
700
701 if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
702 bo->flags |= TEGRA_BO_BOTTOM_UP;
703
704 drm_gem_object_put(gem);
705
706 return 0;
707}
708
709static int tegra_gem_get_flags(struct drm_device *drm, void *data,
710 struct drm_file *file)
711{
712 struct drm_tegra_gem_get_flags *args = data;
713 struct drm_gem_object *gem;
714 struct tegra_bo *bo;
715
716 gem = drm_gem_object_lookup(file, args->handle);
717 if (!gem)
718 return -ENOENT;
719
720 bo = to_tegra_bo(gem);
721 args->flags = 0;
722
723 if (bo->flags & TEGRA_BO_BOTTOM_UP)
724 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
725
726 drm_gem_object_put(gem);
727
728 return 0;
729}
730#endif
731
732static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
733#ifdef CONFIG_DRM_TEGRA_STAGING
734 DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create,
735 DRM_RENDER_ALLOW),
736 DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap,
737 DRM_RENDER_ALLOW),
738 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read,
739 DRM_RENDER_ALLOW),
740 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr,
741 DRM_RENDER_ALLOW),
742 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait,
743 DRM_RENDER_ALLOW),
744 DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel,
745 DRM_RENDER_ALLOW),
746 DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel,
747 DRM_RENDER_ALLOW),
748 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt,
749 DRM_RENDER_ALLOW),
750 DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit,
751 DRM_RENDER_ALLOW),
752 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base,
753 DRM_RENDER_ALLOW),
754 DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling,
755 DRM_RENDER_ALLOW),
756 DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling,
757 DRM_RENDER_ALLOW),
758 DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags,
759 DRM_RENDER_ALLOW),
760 DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags,
761 DRM_RENDER_ALLOW),
762#endif
763};
764
765static const struct file_operations tegra_drm_fops = {
766 .owner = THIS_MODULE,
767 .open = drm_open,
768 .release = drm_release,
769 .unlocked_ioctl = drm_ioctl,
770 .mmap = tegra_drm_mmap,
771 .poll = drm_poll,
772 .read = drm_read,
773 .compat_ioctl = drm_compat_ioctl,
774 .llseek = noop_llseek,
775};
776
777static int tegra_drm_context_cleanup(int id, void *p, void *data)
778{
779 struct tegra_drm_context *context = p;
780
781 tegra_drm_context_free(context);
782
783 return 0;
784}
785
786static void tegra_drm_postclose(struct drm_device *drm, struct drm_file *file)
787{
788 struct tegra_drm_file *fpriv = file->driver_priv;
789
790 mutex_lock(&fpriv->lock);
791 idr_for_each(&fpriv->contexts, tegra_drm_context_cleanup, NULL);
792 mutex_unlock(&fpriv->lock);
793
794 idr_destroy(&fpriv->contexts);
795 mutex_destroy(&fpriv->lock);
796 kfree(fpriv);
797}
798
799#ifdef CONFIG_DEBUG_FS
800static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
801{
802 struct drm_info_node *node = (struct drm_info_node *)s->private;
803 struct drm_device *drm = node->minor->dev;
804 struct drm_framebuffer *fb;
805
806 mutex_lock(&drm->mode_config.fb_lock);
807
808 list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
809 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
810 fb->base.id, fb->width, fb->height,
811 fb->format->depth,
812 fb->format->cpp[0] * 8,
813 drm_framebuffer_read_refcount(fb));
814 }
815
816 mutex_unlock(&drm->mode_config.fb_lock);
817
818 return 0;
819}
820
821static int tegra_debugfs_iova(struct seq_file *s, void *data)
822{
823 struct drm_info_node *node = (struct drm_info_node *)s->private;
824 struct drm_device *drm = node->minor->dev;
825 struct tegra_drm *tegra = drm->dev_private;
826 struct drm_printer p = drm_seq_file_printer(s);
827
828 if (tegra->domain) {
829 mutex_lock(&tegra->mm_lock);
830 drm_mm_print(&tegra->mm, &p);
831 mutex_unlock(&tegra->mm_lock);
832 }
833
834 return 0;
835}
836
837static struct drm_info_list tegra_debugfs_list[] = {
838 { "framebuffers", tegra_debugfs_framebuffers, 0 },
839 { "iova", tegra_debugfs_iova, 0 },
840};
841
842static void tegra_debugfs_init(struct drm_minor *minor)
843{
844 drm_debugfs_create_files(tegra_debugfs_list,
845 ARRAY_SIZE(tegra_debugfs_list),
846 minor->debugfs_root, minor);
847}
848#endif
849
850static struct drm_driver tegra_drm_driver = {
851 .driver_features = DRIVER_MODESET | DRIVER_GEM |
852 DRIVER_ATOMIC | DRIVER_RENDER,
853 .open = tegra_drm_open,
854 .postclose = tegra_drm_postclose,
855 .lastclose = drm_fb_helper_lastclose,
856
857#if defined(CONFIG_DEBUG_FS)
858 .debugfs_init = tegra_debugfs_init,
859#endif
860
861 .gem_free_object_unlocked = tegra_bo_free_object,
862 .gem_vm_ops = &tegra_bo_vm_ops,
863
864 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
865 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
866 .gem_prime_export = tegra_gem_prime_export,
867 .gem_prime_import = tegra_gem_prime_import,
868
869 .dumb_create = tegra_bo_dumb_create,
870
871 .ioctls = tegra_drm_ioctls,
872 .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
873 .fops = &tegra_drm_fops,
874
875 .name = DRIVER_NAME,
876 .desc = DRIVER_DESC,
877 .date = DRIVER_DATE,
878 .major = DRIVER_MAJOR,
879 .minor = DRIVER_MINOR,
880 .patchlevel = DRIVER_PATCHLEVEL,
881};
882
883int tegra_drm_register_client(struct tegra_drm *tegra,
884 struct tegra_drm_client *client)
885{
886 mutex_lock(&tegra->clients_lock);
887 list_add_tail(&client->list, &tegra->clients);
888 client->drm = tegra;
889 mutex_unlock(&tegra->clients_lock);
890
891 return 0;
892}
893
894int tegra_drm_unregister_client(struct tegra_drm *tegra,
895 struct tegra_drm_client *client)
896{
897 mutex_lock(&tegra->clients_lock);
898 list_del_init(&client->list);
899 client->drm = NULL;
900 mutex_unlock(&tegra->clients_lock);
901
902 return 0;
903}
904
905int host1x_client_iommu_attach(struct host1x_client *client)
906{
907 struct iommu_domain *domain = iommu_get_domain_for_dev(client->dev);
908 struct drm_device *drm = dev_get_drvdata(client->host);
909 struct tegra_drm *tegra = drm->dev_private;
910 struct iommu_group *group = NULL;
911 int err;
912
913 /*
914 * If the host1x client is already attached to an IOMMU domain that is
915 * not the shared IOMMU domain, don't try to attach it to a different
916 * domain. This allows using the IOMMU-backed DMA API.
917 */
918 if (domain && domain != tegra->domain)
919 return 0;
920
921 if (tegra->domain) {
922 group = iommu_group_get(client->dev);
923 if (!group)
924 return -ENODEV;
925
926 if (domain != tegra->domain) {
927 err = iommu_attach_group(tegra->domain, group);
928 if (err < 0) {
929 iommu_group_put(group);
930 return err;
931 }
932 }
933
934 tegra->use_explicit_iommu = true;
935 }
936
937 client->group = group;
938
939 return 0;
940}
941
942void host1x_client_iommu_detach(struct host1x_client *client)
943{
944 struct drm_device *drm = dev_get_drvdata(client->host);
945 struct tegra_drm *tegra = drm->dev_private;
946 struct iommu_domain *domain;
947
948 if (client->group) {
949 /*
950 * Devices that are part of the same group may no longer be
951 * attached to a domain at this point because their group may
952 * have been detached by an earlier client.
953 */
954 domain = iommu_get_domain_for_dev(client->dev);
955 if (domain)
956 iommu_detach_group(tegra->domain, client->group);
957
958 iommu_group_put(client->group);
959 client->group = NULL;
960 }
961}
962
963void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *dma)
964{
965 struct iova *alloc;
966 void *virt;
967 gfp_t gfp;
968 int err;
969
970 if (tegra->domain)
971 size = iova_align(&tegra->carveout.domain, size);
972 else
973 size = PAGE_ALIGN(size);
974
975 gfp = GFP_KERNEL | __GFP_ZERO;
976 if (!tegra->domain) {
977 /*
978 * Many units only support 32-bit addresses, even on 64-bit
979 * SoCs. If there is no IOMMU to translate into a 32-bit IO
980 * virtual address space, force allocations to be in the
981 * lower 32-bit range.
982 */
983 gfp |= GFP_DMA;
984 }
985
986 virt = (void *)__get_free_pages(gfp, get_order(size));
987 if (!virt)
988 return ERR_PTR(-ENOMEM);
989
990 if (!tegra->domain) {
991 /*
992 * If IOMMU is disabled, devices address physical memory
993 * directly.
994 */
995 *dma = virt_to_phys(virt);
996 return virt;
997 }
998
999 alloc = alloc_iova(&tegra->carveout.domain,
1000 size >> tegra->carveout.shift,
1001 tegra->carveout.limit, true);
1002 if (!alloc) {
1003 err = -EBUSY;
1004 goto free_pages;
1005 }
1006
1007 *dma = iova_dma_addr(&tegra->carveout.domain, alloc);
1008 err = iommu_map(tegra->domain, *dma, virt_to_phys(virt),
1009 size, IOMMU_READ | IOMMU_WRITE);
1010 if (err < 0)
1011 goto free_iova;
1012
1013 return virt;
1014
1015free_iova:
1016 __free_iova(&tegra->carveout.domain, alloc);
1017free_pages:
1018 free_pages((unsigned long)virt, get_order(size));
1019
1020 return ERR_PTR(err);
1021}
1022
1023void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
1024 dma_addr_t dma)
1025{
1026 if (tegra->domain)
1027 size = iova_align(&tegra->carveout.domain, size);
1028 else
1029 size = PAGE_ALIGN(size);
1030
1031 if (tegra->domain) {
1032 iommu_unmap(tegra->domain, dma, size);
1033 free_iova(&tegra->carveout.domain,
1034 iova_pfn(&tegra->carveout.domain, dma));
1035 }
1036
1037 free_pages((unsigned long)virt, get_order(size));
1038}
1039
1040static bool host1x_drm_wants_iommu(struct host1x_device *dev)
1041{
1042 struct host1x *host1x = dev_get_drvdata(dev->dev.parent);
1043 struct iommu_domain *domain;
1044
1045 /*
1046 * If the Tegra DRM clients are backed by an IOMMU, push buffers are
1047 * likely to be allocated beyond the 32-bit boundary if sufficient
1048 * system memory is available. This is problematic on earlier Tegra
1049 * generations where host1x supports a maximum of 32 address bits in
1050 * the GATHER opcode. In this case, unless host1x is behind an IOMMU
1051 * as well it won't be able to process buffers allocated beyond the
1052 * 32-bit boundary.
1053 *
1054 * The DMA API will use bounce buffers in this case, so that could
1055 * perhaps still be made to work, even if less efficient, but there
1056 * is another catch: in order to perform cache maintenance on pages
1057 * allocated for discontiguous buffers we need to map and unmap the
1058 * SG table representing these buffers. This is fine for something
1059 * small like a push buffer, but it exhausts the bounce buffer pool
1060 * (typically on the order of a few MiB) for framebuffers (many MiB
1061 * for any modern resolution).
1062 *
1063 * Work around this by making sure that Tegra DRM clients only use
1064 * an IOMMU if the parent host1x also uses an IOMMU.
1065 *
1066 * Note that there's still a small gap here that we don't cover: if
1067 * the DMA API is backed by an IOMMU there's no way to control which
1068 * device is attached to an IOMMU and which isn't, except via wiring
1069 * up the device tree appropriately. This is considered an problem
1070 * of integration, so care must be taken for the DT to be consistent.
1071 */
1072 domain = iommu_get_domain_for_dev(dev->dev.parent);
1073
1074 /*
1075 * Tegra20 and Tegra30 don't support addressing memory beyond the
1076 * 32-bit boundary, so the regular GATHER opcodes will always be
1077 * sufficient and whether or not the host1x is attached to an IOMMU
1078 * doesn't matter.
1079 */
1080 if (!domain && host1x_get_dma_mask(host1x) <= DMA_BIT_MASK(32))
1081 return true;
1082
1083 return domain != NULL;
1084}
1085
1086static int host1x_drm_probe(struct host1x_device *dev)
1087{
1088 struct drm_driver *driver = &tegra_drm_driver;
1089 struct tegra_drm *tegra;
1090 struct drm_device *drm;
1091 int err;
1092
1093 drm = drm_dev_alloc(driver, &dev->dev);
1094 if (IS_ERR(drm))
1095 return PTR_ERR(drm);
1096
1097 tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
1098 if (!tegra) {
1099 err = -ENOMEM;
1100 goto put;
1101 }
1102
1103 if (host1x_drm_wants_iommu(dev) && iommu_present(&platform_bus_type)) {
1104 tegra->domain = iommu_domain_alloc(&platform_bus_type);
1105 if (!tegra->domain) {
1106 err = -ENOMEM;
1107 goto free;
1108 }
1109
1110 err = iova_cache_get();
1111 if (err < 0)
1112 goto domain;
1113 }
1114
1115 mutex_init(&tegra->clients_lock);
1116 INIT_LIST_HEAD(&tegra->clients);
1117
1118 dev_set_drvdata(&dev->dev, drm);
1119 drm->dev_private = tegra;
1120 tegra->drm = drm;
1121
1122 drm_mode_config_init(drm);
1123
1124 drm->mode_config.min_width = 0;
1125 drm->mode_config.min_height = 0;
1126
1127 drm->mode_config.max_width = 4096;
1128 drm->mode_config.max_height = 4096;
1129
1130 drm->mode_config.allow_fb_modifiers = true;
1131
1132 drm->mode_config.normalize_zpos = true;
1133
1134 drm->mode_config.funcs = &tegra_drm_mode_config_funcs;
1135 drm->mode_config.helper_private = &tegra_drm_mode_config_helpers;
1136
1137 err = tegra_drm_fb_prepare(drm);
1138 if (err < 0)
1139 goto config;
1140
1141 drm_kms_helper_poll_init(drm);
1142
1143 err = host1x_device_init(dev);
1144 if (err < 0)
1145 goto fbdev;
1146
1147 if (tegra->use_explicit_iommu) {
1148 u64 carveout_start, carveout_end, gem_start, gem_end;
1149 u64 dma_mask = dma_get_mask(&dev->dev);
1150 dma_addr_t start, end;
1151 unsigned long order;
1152
1153 start = tegra->domain->geometry.aperture_start & dma_mask;
1154 end = tegra->domain->geometry.aperture_end & dma_mask;
1155
1156 gem_start = start;
1157 gem_end = end - CARVEOUT_SZ;
1158 carveout_start = gem_end + 1;
1159 carveout_end = end;
1160
1161 order = __ffs(tegra->domain->pgsize_bitmap);
1162 init_iova_domain(&tegra->carveout.domain, 1UL << order,
1163 carveout_start >> order);
1164
1165 tegra->carveout.shift = iova_shift(&tegra->carveout.domain);
1166 tegra->carveout.limit = carveout_end >> tegra->carveout.shift;
1167
1168 drm_mm_init(&tegra->mm, gem_start, gem_end - gem_start + 1);
1169 mutex_init(&tegra->mm_lock);
1170
1171 DRM_DEBUG_DRIVER("IOMMU apertures:\n");
1172 DRM_DEBUG_DRIVER(" GEM: %#llx-%#llx\n", gem_start, gem_end);
1173 DRM_DEBUG_DRIVER(" Carveout: %#llx-%#llx\n", carveout_start,
1174 carveout_end);
1175 } else if (tegra->domain) {
1176 iommu_domain_free(tegra->domain);
1177 tegra->domain = NULL;
1178 iova_cache_put();
1179 }
1180
1181 if (tegra->hub) {
1182 err = tegra_display_hub_prepare(tegra->hub);
1183 if (err < 0)
1184 goto device;
1185 }
1186
1187 /*
1188 * We don't use the drm_irq_install() helpers provided by the DRM
1189 * core, so we need to set this manually in order to allow the
1190 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
1191 */
1192 drm->irq_enabled = true;
1193
1194 /* syncpoints are used for full 32-bit hardware VBLANK counters */
1195 drm->max_vblank_count = 0xffffffff;
1196
1197 err = drm_vblank_init(drm, drm->mode_config.num_crtc);
1198 if (err < 0)
1199 goto hub;
1200
1201 drm_mode_config_reset(drm);
1202
1203 err = drm_fb_helper_remove_conflicting_framebuffers(NULL, "tegradrmfb",
1204 false);
1205 if (err < 0)
1206 goto hub;
1207
1208 err = tegra_drm_fb_init(drm);
1209 if (err < 0)
1210 goto hub;
1211
1212 err = drm_dev_register(drm, 0);
1213 if (err < 0)
1214 goto fb;
1215
1216 return 0;
1217
1218fb:
1219 tegra_drm_fb_exit(drm);
1220hub:
1221 if (tegra->hub)
1222 tegra_display_hub_cleanup(tegra->hub);
1223device:
1224 if (tegra->domain) {
1225 mutex_destroy(&tegra->mm_lock);
1226 drm_mm_takedown(&tegra->mm);
1227 put_iova_domain(&tegra->carveout.domain);
1228 iova_cache_put();
1229 }
1230
1231 host1x_device_exit(dev);
1232fbdev:
1233 drm_kms_helper_poll_fini(drm);
1234 tegra_drm_fb_free(drm);
1235config:
1236 drm_mode_config_cleanup(drm);
1237domain:
1238 if (tegra->domain)
1239 iommu_domain_free(tegra->domain);
1240free:
1241 kfree(tegra);
1242put:
1243 drm_dev_put(drm);
1244 return err;
1245}
1246
1247static int host1x_drm_remove(struct host1x_device *dev)
1248{
1249 struct drm_device *drm = dev_get_drvdata(&dev->dev);
1250 struct tegra_drm *tegra = drm->dev_private;
1251 int err;
1252
1253 drm_dev_unregister(drm);
1254
1255 drm_kms_helper_poll_fini(drm);
1256 tegra_drm_fb_exit(drm);
1257 drm_atomic_helper_shutdown(drm);
1258 drm_mode_config_cleanup(drm);
1259
1260 if (tegra->hub)
1261 tegra_display_hub_cleanup(tegra->hub);
1262
1263 err = host1x_device_exit(dev);
1264 if (err < 0)
1265 dev_err(&dev->dev, "host1x device cleanup failed: %d\n", err);
1266
1267 if (tegra->domain) {
1268 mutex_destroy(&tegra->mm_lock);
1269 drm_mm_takedown(&tegra->mm);
1270 put_iova_domain(&tegra->carveout.domain);
1271 iova_cache_put();
1272 iommu_domain_free(tegra->domain);
1273 }
1274
1275 kfree(tegra);
1276 drm_dev_put(drm);
1277
1278 return 0;
1279}
1280
1281#ifdef CONFIG_PM_SLEEP
1282static int host1x_drm_suspend(struct device *dev)
1283{
1284 struct drm_device *drm = dev_get_drvdata(dev);
1285
1286 return drm_mode_config_helper_suspend(drm);
1287}
1288
1289static int host1x_drm_resume(struct device *dev)
1290{
1291 struct drm_device *drm = dev_get_drvdata(dev);
1292
1293 return drm_mode_config_helper_resume(drm);
1294}
1295#endif
1296
1297static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1298 host1x_drm_resume);
1299
1300static const struct of_device_id host1x_drm_subdevs[] = {
1301 { .compatible = "nvidia,tegra20-dc", },
1302 { .compatible = "nvidia,tegra20-hdmi", },
1303 { .compatible = "nvidia,tegra20-gr2d", },
1304 { .compatible = "nvidia,tegra20-gr3d", },
1305 { .compatible = "nvidia,tegra30-dc", },
1306 { .compatible = "nvidia,tegra30-hdmi", },
1307 { .compatible = "nvidia,tegra30-gr2d", },
1308 { .compatible = "nvidia,tegra30-gr3d", },
1309 { .compatible = "nvidia,tegra114-dsi", },
1310 { .compatible = "nvidia,tegra114-hdmi", },
1311 { .compatible = "nvidia,tegra114-gr3d", },
1312 { .compatible = "nvidia,tegra124-dc", },
1313 { .compatible = "nvidia,tegra124-sor", },
1314 { .compatible = "nvidia,tegra124-hdmi", },
1315 { .compatible = "nvidia,tegra124-dsi", },
1316 { .compatible = "nvidia,tegra124-vic", },
1317 { .compatible = "nvidia,tegra132-dsi", },
1318 { .compatible = "nvidia,tegra210-dc", },
1319 { .compatible = "nvidia,tegra210-dsi", },
1320 { .compatible = "nvidia,tegra210-sor", },
1321 { .compatible = "nvidia,tegra210-sor1", },
1322 { .compatible = "nvidia,tegra210-vic", },
1323 { .compatible = "nvidia,tegra186-display", },
1324 { .compatible = "nvidia,tegra186-dc", },
1325 { .compatible = "nvidia,tegra186-sor", },
1326 { .compatible = "nvidia,tegra186-sor1", },
1327 { .compatible = "nvidia,tegra186-vic", },
1328 { .compatible = "nvidia,tegra194-display", },
1329 { .compatible = "nvidia,tegra194-dc", },
1330 { .compatible = "nvidia,tegra194-sor", },
1331 { .compatible = "nvidia,tegra194-vic", },
1332 { /* sentinel */ }
1333};
1334
1335static struct host1x_driver host1x_drm_driver = {
1336 .driver = {
1337 .name = "drm",
1338 .pm = &host1x_drm_pm_ops,
1339 },
1340 .probe = host1x_drm_probe,
1341 .remove = host1x_drm_remove,
1342 .subdevs = host1x_drm_subdevs,
1343};
1344
1345static struct platform_driver * const drivers[] = {
1346 &tegra_display_hub_driver,
1347 &tegra_dc_driver,
1348 &tegra_hdmi_driver,
1349 &tegra_dsi_driver,
1350 &tegra_dpaux_driver,
1351 &tegra_sor_driver,
1352 &tegra_gr2d_driver,
1353 &tegra_gr3d_driver,
1354 &tegra_vic_driver,
1355};
1356
1357static int __init host1x_drm_init(void)
1358{
1359 int err;
1360
1361 err = host1x_driver_register(&host1x_drm_driver);
1362 if (err < 0)
1363 return err;
1364
1365 err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1366 if (err < 0)
1367 goto unregister_host1x;
1368
1369 return 0;
1370
1371unregister_host1x:
1372 host1x_driver_unregister(&host1x_drm_driver);
1373 return err;
1374}
1375module_init(host1x_drm_init);
1376
1377static void __exit host1x_drm_exit(void)
1378{
1379 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1380 host1x_driver_unregister(&host1x_drm_driver);
1381}
1382module_exit(host1x_drm_exit);
1383
1384MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1385MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1386MODULE_LICENSE("GPL v2");