]> Git Repo - linux.git/blob - drivers/gpu/drm/tegra/drm.c
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[linux.git] / drivers / gpu / drm / tegra / drm.c
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 void tegra_atomic_schedule(struct tegra_drm *tegra,
37                                   struct drm_atomic_state *state)
38 {
39         tegra->commit.state = state;
40         schedule_work(&tegra->commit.work);
41 }
42
43 static void tegra_atomic_complete(struct tegra_drm *tegra,
44                                   struct drm_atomic_state *state)
45 {
46         struct drm_device *drm = tegra->drm;
47
48         /*
49          * Everything below can be run asynchronously without the need to grab
50          * any modeset locks at all under one condition: It must be guaranteed
51          * that the asynchronous work has either been cancelled (if the driver
52          * supports it, which at least requires that the framebuffers get
53          * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
54          * before the new state gets committed on the software side with
55          * drm_atomic_helper_swap_state().
56          *
57          * This scheme allows new atomic state updates to be prepared and
58          * checked in parallel to the asynchronous completion of the previous
59          * update. Which is important since compositors need to figure out the
60          * composition of the next frame right after having submitted the
61          * current layout.
62          */
63
64         drm_atomic_helper_commit_modeset_disables(drm, state);
65         drm_atomic_helper_commit_modeset_enables(drm, state);
66         drm_atomic_helper_commit_planes(drm, state,
67                                         DRM_PLANE_COMMIT_ACTIVE_ONLY);
68
69         drm_atomic_helper_wait_for_vblanks(drm, state);
70
71         drm_atomic_helper_cleanup_planes(drm, state);
72         drm_atomic_state_put(state);
73 }
74
75 static void tegra_atomic_work(struct work_struct *work)
76 {
77         struct tegra_drm *tegra = container_of(work, struct tegra_drm,
78                                                commit.work);
79
80         tegra_atomic_complete(tegra, tegra->commit.state);
81 }
82
83 static int tegra_atomic_commit(struct drm_device *drm,
84                                struct drm_atomic_state *state, bool nonblock)
85 {
86         struct tegra_drm *tegra = drm->dev_private;
87         int err;
88
89         err = drm_atomic_helper_prepare_planes(drm, state);
90         if (err)
91                 return err;
92
93         /* serialize outstanding nonblocking commits */
94         mutex_lock(&tegra->commit.lock);
95         flush_work(&tegra->commit.work);
96
97         /*
98          * This is the point of no return - everything below never fails except
99          * when the hw goes bonghits. Which means we can commit the new state on
100          * the software side now.
101          */
102
103         err = drm_atomic_helper_swap_state(state, true);
104         if (err) {
105                 mutex_unlock(&tegra->commit.lock);
106                 drm_atomic_helper_cleanup_planes(drm, state);
107                 return err;
108         }
109
110         drm_atomic_state_get(state);
111         if (nonblock)
112                 tegra_atomic_schedule(tegra, state);
113         else
114                 tegra_atomic_complete(tegra, state);
115
116         mutex_unlock(&tegra->commit.lock);
117         return 0;
118 }
119
120 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
121         .fb_create = tegra_fb_create,
122 #ifdef CONFIG_DRM_FBDEV_EMULATION
123         .output_poll_changed = tegra_fb_output_poll_changed,
124 #endif
125         .atomic_check = drm_atomic_helper_check,
126         .atomic_commit = tegra_atomic_commit,
127 };
128
129 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
130 {
131         struct host1x_device *device = to_host1x_device(drm->dev);
132         struct tegra_drm *tegra;
133         int err;
134
135         tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
136         if (!tegra)
137                 return -ENOMEM;
138
139         if (iommu_present(&platform_bus_type)) {
140                 u64 carveout_start, carveout_end, gem_start, gem_end;
141                 struct iommu_domain_geometry *geometry;
142                 unsigned long order;
143
144                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
145                 if (!tegra->domain) {
146                         err = -ENOMEM;
147                         goto free;
148                 }
149
150                 geometry = &tegra->domain->geometry;
151                 gem_start = geometry->aperture_start;
152                 gem_end = geometry->aperture_end - CARVEOUT_SZ;
153                 carveout_start = gem_end + 1;
154                 carveout_end = geometry->aperture_end;
155
156                 order = __ffs(tegra->domain->pgsize_bitmap);
157                 init_iova_domain(&tegra->carveout.domain, 1UL << order,
158                                  carveout_start >> order);
159
160                 tegra->carveout.shift = iova_shift(&tegra->carveout.domain);
161                 tegra->carveout.limit = carveout_end >> tegra->carveout.shift;
162
163                 drm_mm_init(&tegra->mm, gem_start, gem_end - gem_start + 1);
164                 mutex_init(&tegra->mm_lock);
165
166                 DRM_DEBUG("IOMMU apertures:\n");
167                 DRM_DEBUG("  GEM: %#llx-%#llx\n", gem_start, gem_end);
168                 DRM_DEBUG("  Carveout: %#llx-%#llx\n", carveout_start,
169                           carveout_end);
170         }
171
172         mutex_init(&tegra->clients_lock);
173         INIT_LIST_HEAD(&tegra->clients);
174
175         mutex_init(&tegra->commit.lock);
176         INIT_WORK(&tegra->commit.work, tegra_atomic_work);
177
178         drm->dev_private = tegra;
179         tegra->drm = drm;
180
181         drm_mode_config_init(drm);
182
183         drm->mode_config.min_width = 0;
184         drm->mode_config.min_height = 0;
185
186         drm->mode_config.max_width = 4096;
187         drm->mode_config.max_height = 4096;
188
189         drm->mode_config.allow_fb_modifiers = true;
190
191         drm->mode_config.funcs = &tegra_drm_mode_funcs;
192
193         err = tegra_drm_fb_prepare(drm);
194         if (err < 0)
195                 goto config;
196
197         drm_kms_helper_poll_init(drm);
198
199         err = host1x_device_init(device);
200         if (err < 0)
201                 goto fbdev;
202
203         /*
204          * We don't use the drm_irq_install() helpers provided by the DRM
205          * core, so we need to set this manually in order to allow the
206          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
207          */
208         drm->irq_enabled = true;
209
210         /* syncpoints are used for full 32-bit hardware VBLANK counters */
211         drm->max_vblank_count = 0xffffffff;
212
213         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
214         if (err < 0)
215                 goto device;
216
217         drm_mode_config_reset(drm);
218
219         err = tegra_drm_fb_init(drm);
220         if (err < 0)
221                 goto device;
222
223         return 0;
224
225 device:
226         host1x_device_exit(device);
227 fbdev:
228         drm_kms_helper_poll_fini(drm);
229         tegra_drm_fb_free(drm);
230 config:
231         drm_mode_config_cleanup(drm);
232
233         if (tegra->domain) {
234                 iommu_domain_free(tegra->domain);
235                 drm_mm_takedown(&tegra->mm);
236                 mutex_destroy(&tegra->mm_lock);
237                 put_iova_domain(&tegra->carveout.domain);
238         }
239 free:
240         kfree(tegra);
241         return err;
242 }
243
244 static void tegra_drm_unload(struct drm_device *drm)
245 {
246         struct host1x_device *device = to_host1x_device(drm->dev);
247         struct tegra_drm *tegra = drm->dev_private;
248         int err;
249
250         drm_kms_helper_poll_fini(drm);
251         tegra_drm_fb_exit(drm);
252         drm_mode_config_cleanup(drm);
253
254         err = host1x_device_exit(device);
255         if (err < 0)
256                 return;
257
258         if (tegra->domain) {
259                 iommu_domain_free(tegra->domain);
260                 drm_mm_takedown(&tegra->mm);
261                 mutex_destroy(&tegra->mm_lock);
262                 put_iova_domain(&tegra->carveout.domain);
263         }
264
265         kfree(tegra);
266 }
267
268 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
269 {
270         struct tegra_drm_file *fpriv;
271
272         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
273         if (!fpriv)
274                 return -ENOMEM;
275
276         idr_init(&fpriv->contexts);
277         mutex_init(&fpriv->lock);
278         filp->driver_priv = fpriv;
279
280         return 0;
281 }
282
283 static void tegra_drm_context_free(struct tegra_drm_context *context)
284 {
285         context->client->ops->close_channel(context);
286         kfree(context);
287 }
288
289 static void tegra_drm_lastclose(struct drm_device *drm)
290 {
291 #ifdef CONFIG_DRM_FBDEV_EMULATION
292         struct tegra_drm *tegra = drm->dev_private;
293
294         tegra_fbdev_restore_mode(tegra->fbdev);
295 #endif
296 }
297
298 static struct host1x_bo *
299 host1x_bo_lookup(struct drm_file *file, u32 handle)
300 {
301         struct drm_gem_object *gem;
302         struct tegra_bo *bo;
303
304         gem = drm_gem_object_lookup(file, handle);
305         if (!gem)
306                 return NULL;
307
308         bo = to_tegra_bo(gem);
309         return &bo->base;
310 }
311
312 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
313                                        struct drm_tegra_reloc __user *src,
314                                        struct drm_device *drm,
315                                        struct drm_file *file)
316 {
317         u32 cmdbuf, target;
318         int err;
319
320         err = get_user(cmdbuf, &src->cmdbuf.handle);
321         if (err < 0)
322                 return err;
323
324         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
325         if (err < 0)
326                 return err;
327
328         err = get_user(target, &src->target.handle);
329         if (err < 0)
330                 return err;
331
332         err = get_user(dest->target.offset, &src->target.offset);
333         if (err < 0)
334                 return err;
335
336         err = get_user(dest->shift, &src->shift);
337         if (err < 0)
338                 return err;
339
340         dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf);
341         if (!dest->cmdbuf.bo)
342                 return -ENOENT;
343
344         dest->target.bo = host1x_bo_lookup(file, target);
345         if (!dest->target.bo)
346                 return -ENOENT;
347
348         return 0;
349 }
350
351 static int host1x_waitchk_copy_from_user(struct host1x_waitchk *dest,
352                                          struct drm_tegra_waitchk __user *src,
353                                          struct drm_file *file)
354 {
355         u32 cmdbuf;
356         int err;
357
358         err = get_user(cmdbuf, &src->handle);
359         if (err < 0)
360                 return err;
361
362         err = get_user(dest->offset, &src->offset);
363         if (err < 0)
364                 return err;
365
366         err = get_user(dest->syncpt_id, &src->syncpt);
367         if (err < 0)
368                 return err;
369
370         err = get_user(dest->thresh, &src->thresh);
371         if (err < 0)
372                 return err;
373
374         dest->bo = host1x_bo_lookup(file, cmdbuf);
375         if (!dest->bo)
376                 return -ENOENT;
377
378         return 0;
379 }
380
381 int tegra_drm_submit(struct tegra_drm_context *context,
382                      struct drm_tegra_submit *args, struct drm_device *drm,
383                      struct drm_file *file)
384 {
385         unsigned int num_cmdbufs = args->num_cmdbufs;
386         unsigned int num_relocs = args->num_relocs;
387         unsigned int num_waitchks = args->num_waitchks;
388         struct drm_tegra_cmdbuf __user *user_cmdbufs;
389         struct drm_tegra_reloc __user *user_relocs;
390         struct drm_tegra_waitchk __user *user_waitchks;
391         struct drm_tegra_syncpt __user *user_syncpt;
392         struct drm_tegra_syncpt syncpt;
393         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
394         struct drm_gem_object **refs;
395         struct host1x_syncpt *sp;
396         struct host1x_job *job;
397         unsigned int num_refs;
398         int err;
399
400         user_cmdbufs = u64_to_user_ptr(args->cmdbufs);
401         user_relocs = u64_to_user_ptr(args->relocs);
402         user_waitchks = u64_to_user_ptr(args->waitchks);
403         user_syncpt = u64_to_user_ptr(args->syncpts);
404
405         /* We don't yet support other than one syncpt_incr struct per submit */
406         if (args->num_syncpts != 1)
407                 return -EINVAL;
408
409         /* We don't yet support waitchks */
410         if (args->num_waitchks != 0)
411                 return -EINVAL;
412
413         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
414                                args->num_relocs, args->num_waitchks);
415         if (!job)
416                 return -ENOMEM;
417
418         job->num_relocs = args->num_relocs;
419         job->num_waitchk = args->num_waitchks;
420         job->client = (u32)args->context;
421         job->class = context->client->base.class;
422         job->serialize = true;
423
424         /*
425          * Track referenced BOs so that they can be unreferenced after the
426          * submission is complete.
427          */
428         num_refs = num_cmdbufs + num_relocs * 2 + num_waitchks;
429
430         refs = kmalloc_array(num_refs, sizeof(*refs), GFP_KERNEL);
431         if (!refs) {
432                 err = -ENOMEM;
433                 goto put;
434         }
435
436         /* reuse as an iterator later */
437         num_refs = 0;
438
439         while (num_cmdbufs) {
440                 struct drm_tegra_cmdbuf cmdbuf;
441                 struct host1x_bo *bo;
442                 struct tegra_bo *obj;
443                 u64 offset;
444
445                 if (copy_from_user(&cmdbuf, user_cmdbufs, sizeof(cmdbuf))) {
446                         err = -EFAULT;
447                         goto fail;
448                 }
449
450                 /*
451                  * The maximum number of CDMA gather fetches is 16383, a higher
452                  * value means the words count is malformed.
453                  */
454                 if (cmdbuf.words > CDMA_GATHER_FETCHES_MAX_NB) {
455                         err = -EINVAL;
456                         goto fail;
457                 }
458
459                 bo = host1x_bo_lookup(file, cmdbuf.handle);
460                 if (!bo) {
461                         err = -ENOENT;
462                         goto fail;
463                 }
464
465                 offset = (u64)cmdbuf.offset + (u64)cmdbuf.words * sizeof(u32);
466                 obj = host1x_to_tegra_bo(bo);
467                 refs[num_refs++] = &obj->gem;
468
469                 /*
470                  * Gather buffer base address must be 4-bytes aligned,
471                  * unaligned offset is malformed and cause commands stream
472                  * corruption on the buffer address relocation.
473                  */
474                 if (offset & 3 || offset >= obj->gem.size) {
475                         err = -EINVAL;
476                         goto fail;
477                 }
478
479                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
480                 num_cmdbufs--;
481                 user_cmdbufs++;
482         }
483
484         /* copy and resolve relocations from submit */
485         while (num_relocs--) {
486                 struct host1x_reloc *reloc;
487                 struct tegra_bo *obj;
488
489                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
490                                                   &user_relocs[num_relocs], drm,
491                                                   file);
492                 if (err < 0)
493                         goto fail;
494
495                 reloc = &job->relocarray[num_relocs];
496                 obj = host1x_to_tegra_bo(reloc->cmdbuf.bo);
497                 refs[num_refs++] = &obj->gem;
498
499                 /*
500                  * The unaligned cmdbuf offset will cause an unaligned write
501                  * during of the relocations patching, corrupting the commands
502                  * stream.
503                  */
504                 if (reloc->cmdbuf.offset & 3 ||
505                     reloc->cmdbuf.offset >= obj->gem.size) {
506                         err = -EINVAL;
507                         goto fail;
508                 }
509
510                 obj = host1x_to_tegra_bo(reloc->target.bo);
511                 refs[num_refs++] = &obj->gem;
512
513                 if (reloc->target.offset >= obj->gem.size) {
514                         err = -EINVAL;
515                         goto fail;
516                 }
517         }
518
519         /* copy and resolve waitchks from submit */
520         while (num_waitchks--) {
521                 struct host1x_waitchk *wait = &job->waitchk[num_waitchks];
522                 struct tegra_bo *obj;
523
524                 err = host1x_waitchk_copy_from_user(
525                         wait, &user_waitchks[num_waitchks], file);
526                 if (err < 0)
527                         goto fail;
528
529                 obj = host1x_to_tegra_bo(wait->bo);
530                 refs[num_refs++] = &obj->gem;
531
532                 /*
533                  * The unaligned offset will cause an unaligned write during
534                  * of the waitchks patching, corrupting the commands stream.
535                  */
536                 if (wait->offset & 3 ||
537                     wait->offset >= obj->gem.size) {
538                         err = -EINVAL;
539                         goto fail;
540                 }
541         }
542
543         if (copy_from_user(&syncpt, user_syncpt, sizeof(syncpt))) {
544                 err = -EFAULT;
545                 goto fail;
546         }
547
548         /* check whether syncpoint ID is valid */
549         sp = host1x_syncpt_get(host1x, syncpt.id);
550         if (!sp) {
551                 err = -ENOENT;
552                 goto fail;
553         }
554
555         job->is_addr_reg = context->client->ops->is_addr_reg;
556         job->is_valid_class = context->client->ops->is_valid_class;
557         job->syncpt_incrs = syncpt.incrs;
558         job->syncpt_id = syncpt.id;
559         job->timeout = 10000;
560
561         if (args->timeout && args->timeout < 10000)
562                 job->timeout = args->timeout;
563
564         err = host1x_job_pin(job, context->client->base.dev);
565         if (err)
566                 goto fail;
567
568         err = host1x_job_submit(job);
569         if (err) {
570                 host1x_job_unpin(job);
571                 goto fail;
572         }
573
574         args->fence = job->syncpt_end;
575
576 fail:
577         while (num_refs--)
578                 drm_gem_object_put_unlocked(refs[num_refs]);
579
580         kfree(refs);
581
582 put:
583         host1x_job_put(job);
584         return err;
585 }
586
587
588 #ifdef CONFIG_DRM_TEGRA_STAGING
589 static int tegra_gem_create(struct drm_device *drm, void *data,
590                             struct drm_file *file)
591 {
592         struct drm_tegra_gem_create *args = data;
593         struct tegra_bo *bo;
594
595         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
596                                          &args->handle);
597         if (IS_ERR(bo))
598                 return PTR_ERR(bo);
599
600         return 0;
601 }
602
603 static int tegra_gem_mmap(struct drm_device *drm, void *data,
604                           struct drm_file *file)
605 {
606         struct drm_tegra_gem_mmap *args = data;
607         struct drm_gem_object *gem;
608         struct tegra_bo *bo;
609
610         gem = drm_gem_object_lookup(file, args->handle);
611         if (!gem)
612                 return -EINVAL;
613
614         bo = to_tegra_bo(gem);
615
616         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
617
618         drm_gem_object_put_unlocked(gem);
619
620         return 0;
621 }
622
623 static int tegra_syncpt_read(struct drm_device *drm, void *data,
624                              struct drm_file *file)
625 {
626         struct host1x *host = dev_get_drvdata(drm->dev->parent);
627         struct drm_tegra_syncpt_read *args = data;
628         struct host1x_syncpt *sp;
629
630         sp = host1x_syncpt_get(host, args->id);
631         if (!sp)
632                 return -EINVAL;
633
634         args->value = host1x_syncpt_read_min(sp);
635         return 0;
636 }
637
638 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
639                              struct drm_file *file)
640 {
641         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
642         struct drm_tegra_syncpt_incr *args = data;
643         struct host1x_syncpt *sp;
644
645         sp = host1x_syncpt_get(host1x, args->id);
646         if (!sp)
647                 return -EINVAL;
648
649         return host1x_syncpt_incr(sp);
650 }
651
652 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
653                              struct drm_file *file)
654 {
655         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
656         struct drm_tegra_syncpt_wait *args = data;
657         struct host1x_syncpt *sp;
658
659         sp = host1x_syncpt_get(host1x, args->id);
660         if (!sp)
661                 return -EINVAL;
662
663         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
664                                   &args->value);
665 }
666
667 static int tegra_client_open(struct tegra_drm_file *fpriv,
668                              struct tegra_drm_client *client,
669                              struct tegra_drm_context *context)
670 {
671         int err;
672
673         err = client->ops->open_channel(client, context);
674         if (err < 0)
675                 return err;
676
677         err = idr_alloc(&fpriv->contexts, context, 1, 0, GFP_KERNEL);
678         if (err < 0) {
679                 client->ops->close_channel(context);
680                 return err;
681         }
682
683         context->client = client;
684         context->id = err;
685
686         return 0;
687 }
688
689 static int tegra_open_channel(struct drm_device *drm, void *data,
690                               struct drm_file *file)
691 {
692         struct tegra_drm_file *fpriv = file->driver_priv;
693         struct tegra_drm *tegra = drm->dev_private;
694         struct drm_tegra_open_channel *args = data;
695         struct tegra_drm_context *context;
696         struct tegra_drm_client *client;
697         int err = -ENODEV;
698
699         context = kzalloc(sizeof(*context), GFP_KERNEL);
700         if (!context)
701                 return -ENOMEM;
702
703         mutex_lock(&fpriv->lock);
704
705         list_for_each_entry(client, &tegra->clients, list)
706                 if (client->base.class == args->client) {
707                         err = tegra_client_open(fpriv, client, context);
708                         if (err < 0)
709                                 break;
710
711                         args->context = context->id;
712                         break;
713                 }
714
715         if (err < 0)
716                 kfree(context);
717
718         mutex_unlock(&fpriv->lock);
719         return err;
720 }
721
722 static int tegra_close_channel(struct drm_device *drm, void *data,
723                                struct drm_file *file)
724 {
725         struct tegra_drm_file *fpriv = file->driver_priv;
726         struct drm_tegra_close_channel *args = data;
727         struct tegra_drm_context *context;
728         int err = 0;
729
730         mutex_lock(&fpriv->lock);
731
732         context = idr_find(&fpriv->contexts, args->context);
733         if (!context) {
734                 err = -EINVAL;
735                 goto unlock;
736         }
737
738         idr_remove(&fpriv->contexts, context->id);
739         tegra_drm_context_free(context);
740
741 unlock:
742         mutex_unlock(&fpriv->lock);
743         return err;
744 }
745
746 static int tegra_get_syncpt(struct drm_device *drm, void *data,
747                             struct drm_file *file)
748 {
749         struct tegra_drm_file *fpriv = file->driver_priv;
750         struct drm_tegra_get_syncpt *args = data;
751         struct tegra_drm_context *context;
752         struct host1x_syncpt *syncpt;
753         int err = 0;
754
755         mutex_lock(&fpriv->lock);
756
757         context = idr_find(&fpriv->contexts, args->context);
758         if (!context) {
759                 err = -ENODEV;
760                 goto unlock;
761         }
762
763         if (args->index >= context->client->base.num_syncpts) {
764                 err = -EINVAL;
765                 goto unlock;
766         }
767
768         syncpt = context->client->base.syncpts[args->index];
769         args->id = host1x_syncpt_id(syncpt);
770
771 unlock:
772         mutex_unlock(&fpriv->lock);
773         return err;
774 }
775
776 static int tegra_submit(struct drm_device *drm, void *data,
777                         struct drm_file *file)
778 {
779         struct tegra_drm_file *fpriv = file->driver_priv;
780         struct drm_tegra_submit *args = data;
781         struct tegra_drm_context *context;
782         int err;
783
784         mutex_lock(&fpriv->lock);
785
786         context = idr_find(&fpriv->contexts, args->context);
787         if (!context) {
788                 err = -ENODEV;
789                 goto unlock;
790         }
791
792         err = context->client->ops->submit(context, args, drm, file);
793
794 unlock:
795         mutex_unlock(&fpriv->lock);
796         return err;
797 }
798
799 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
800                                  struct drm_file *file)
801 {
802         struct tegra_drm_file *fpriv = file->driver_priv;
803         struct drm_tegra_get_syncpt_base *args = data;
804         struct tegra_drm_context *context;
805         struct host1x_syncpt_base *base;
806         struct host1x_syncpt *syncpt;
807         int err = 0;
808
809         mutex_lock(&fpriv->lock);
810
811         context = idr_find(&fpriv->contexts, args->context);
812         if (!context) {
813                 err = -ENODEV;
814                 goto unlock;
815         }
816
817         if (args->syncpt >= context->client->base.num_syncpts) {
818                 err = -EINVAL;
819                 goto unlock;
820         }
821
822         syncpt = context->client->base.syncpts[args->syncpt];
823
824         base = host1x_syncpt_get_base(syncpt);
825         if (!base) {
826                 err = -ENXIO;
827                 goto unlock;
828         }
829
830         args->id = host1x_syncpt_base_id(base);
831
832 unlock:
833         mutex_unlock(&fpriv->lock);
834         return err;
835 }
836
837 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
838                                 struct drm_file *file)
839 {
840         struct drm_tegra_gem_set_tiling *args = data;
841         enum tegra_bo_tiling_mode mode;
842         struct drm_gem_object *gem;
843         unsigned long value = 0;
844         struct tegra_bo *bo;
845
846         switch (args->mode) {
847         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
848                 mode = TEGRA_BO_TILING_MODE_PITCH;
849
850                 if (args->value != 0)
851                         return -EINVAL;
852
853                 break;
854
855         case DRM_TEGRA_GEM_TILING_MODE_TILED:
856                 mode = TEGRA_BO_TILING_MODE_TILED;
857
858                 if (args->value != 0)
859                         return -EINVAL;
860
861                 break;
862
863         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
864                 mode = TEGRA_BO_TILING_MODE_BLOCK;
865
866                 if (args->value > 5)
867                         return -EINVAL;
868
869                 value = args->value;
870                 break;
871
872         default:
873                 return -EINVAL;
874         }
875
876         gem = drm_gem_object_lookup(file, args->handle);
877         if (!gem)
878                 return -ENOENT;
879
880         bo = to_tegra_bo(gem);
881
882         bo->tiling.mode = mode;
883         bo->tiling.value = value;
884
885         drm_gem_object_put_unlocked(gem);
886
887         return 0;
888 }
889
890 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
891                                 struct drm_file *file)
892 {
893         struct drm_tegra_gem_get_tiling *args = data;
894         struct drm_gem_object *gem;
895         struct tegra_bo *bo;
896         int err = 0;
897
898         gem = drm_gem_object_lookup(file, args->handle);
899         if (!gem)
900                 return -ENOENT;
901
902         bo = to_tegra_bo(gem);
903
904         switch (bo->tiling.mode) {
905         case TEGRA_BO_TILING_MODE_PITCH:
906                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
907                 args->value = 0;
908                 break;
909
910         case TEGRA_BO_TILING_MODE_TILED:
911                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
912                 args->value = 0;
913                 break;
914
915         case TEGRA_BO_TILING_MODE_BLOCK:
916                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
917                 args->value = bo->tiling.value;
918                 break;
919
920         default:
921                 err = -EINVAL;
922                 break;
923         }
924
925         drm_gem_object_put_unlocked(gem);
926
927         return err;
928 }
929
930 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
931                                struct drm_file *file)
932 {
933         struct drm_tegra_gem_set_flags *args = data;
934         struct drm_gem_object *gem;
935         struct tegra_bo *bo;
936
937         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
938                 return -EINVAL;
939
940         gem = drm_gem_object_lookup(file, args->handle);
941         if (!gem)
942                 return -ENOENT;
943
944         bo = to_tegra_bo(gem);
945         bo->flags = 0;
946
947         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
948                 bo->flags |= TEGRA_BO_BOTTOM_UP;
949
950         drm_gem_object_put_unlocked(gem);
951
952         return 0;
953 }
954
955 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
956                                struct drm_file *file)
957 {
958         struct drm_tegra_gem_get_flags *args = data;
959         struct drm_gem_object *gem;
960         struct tegra_bo *bo;
961
962         gem = drm_gem_object_lookup(file, args->handle);
963         if (!gem)
964                 return -ENOENT;
965
966         bo = to_tegra_bo(gem);
967         args->flags = 0;
968
969         if (bo->flags & TEGRA_BO_BOTTOM_UP)
970                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
971
972         drm_gem_object_put_unlocked(gem);
973
974         return 0;
975 }
976 #endif
977
978 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
979 #ifdef CONFIG_DRM_TEGRA_STAGING
980         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create,
981                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
982         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap,
983                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
984         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read,
985                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
986         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr,
987                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
988         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait,
989                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
990         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel,
991                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
992         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel,
993                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
994         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt,
995                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
996         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit,
997                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
998         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base,
999                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
1000         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling,
1001                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
1002         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling,
1003                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
1004         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags,
1005                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
1006         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags,
1007                           DRM_UNLOCKED | DRM_RENDER_ALLOW),
1008 #endif
1009 };
1010
1011 static const struct file_operations tegra_drm_fops = {
1012         .owner = THIS_MODULE,
1013         .open = drm_open,
1014         .release = drm_release,
1015         .unlocked_ioctl = drm_ioctl,
1016         .mmap = tegra_drm_mmap,
1017         .poll = drm_poll,
1018         .read = drm_read,
1019         .compat_ioctl = drm_compat_ioctl,
1020         .llseek = noop_llseek,
1021 };
1022
1023 static int tegra_drm_context_cleanup(int id, void *p, void *data)
1024 {
1025         struct tegra_drm_context *context = p;
1026
1027         tegra_drm_context_free(context);
1028
1029         return 0;
1030 }
1031
1032 static void tegra_drm_postclose(struct drm_device *drm, struct drm_file *file)
1033 {
1034         struct tegra_drm_file *fpriv = file->driver_priv;
1035
1036         mutex_lock(&fpriv->lock);
1037         idr_for_each(&fpriv->contexts, tegra_drm_context_cleanup, NULL);
1038         mutex_unlock(&fpriv->lock);
1039
1040         idr_destroy(&fpriv->contexts);
1041         mutex_destroy(&fpriv->lock);
1042         kfree(fpriv);
1043 }
1044
1045 #ifdef CONFIG_DEBUG_FS
1046 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
1047 {
1048         struct drm_info_node *node = (struct drm_info_node *)s->private;
1049         struct drm_device *drm = node->minor->dev;
1050         struct drm_framebuffer *fb;
1051
1052         mutex_lock(&drm->mode_config.fb_lock);
1053
1054         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
1055                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
1056                            fb->base.id, fb->width, fb->height,
1057                            fb->format->depth,
1058                            fb->format->cpp[0] * 8,
1059                            drm_framebuffer_read_refcount(fb));
1060         }
1061
1062         mutex_unlock(&drm->mode_config.fb_lock);
1063
1064         return 0;
1065 }
1066
1067 static int tegra_debugfs_iova(struct seq_file *s, void *data)
1068 {
1069         struct drm_info_node *node = (struct drm_info_node *)s->private;
1070         struct drm_device *drm = node->minor->dev;
1071         struct tegra_drm *tegra = drm->dev_private;
1072         struct drm_printer p = drm_seq_file_printer(s);
1073
1074         if (tegra->domain) {
1075                 mutex_lock(&tegra->mm_lock);
1076                 drm_mm_print(&tegra->mm, &p);
1077                 mutex_unlock(&tegra->mm_lock);
1078         }
1079
1080         return 0;
1081 }
1082
1083 static struct drm_info_list tegra_debugfs_list[] = {
1084         { "framebuffers", tegra_debugfs_framebuffers, 0 },
1085         { "iova", tegra_debugfs_iova, 0 },
1086 };
1087
1088 static int tegra_debugfs_init(struct drm_minor *minor)
1089 {
1090         return drm_debugfs_create_files(tegra_debugfs_list,
1091                                         ARRAY_SIZE(tegra_debugfs_list),
1092                                         minor->debugfs_root, minor);
1093 }
1094 #endif
1095
1096 static struct drm_driver tegra_drm_driver = {
1097         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
1098                            DRIVER_ATOMIC | DRIVER_RENDER,
1099         .load = tegra_drm_load,
1100         .unload = tegra_drm_unload,
1101         .open = tegra_drm_open,
1102         .postclose = tegra_drm_postclose,
1103         .lastclose = tegra_drm_lastclose,
1104
1105 #if defined(CONFIG_DEBUG_FS)
1106         .debugfs_init = tegra_debugfs_init,
1107 #endif
1108
1109         .gem_free_object_unlocked = tegra_bo_free_object,
1110         .gem_vm_ops = &tegra_bo_vm_ops,
1111
1112         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
1113         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
1114         .gem_prime_export = tegra_gem_prime_export,
1115         .gem_prime_import = tegra_gem_prime_import,
1116
1117         .dumb_create = tegra_bo_dumb_create,
1118
1119         .ioctls = tegra_drm_ioctls,
1120         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
1121         .fops = &tegra_drm_fops,
1122
1123         .name = DRIVER_NAME,
1124         .desc = DRIVER_DESC,
1125         .date = DRIVER_DATE,
1126         .major = DRIVER_MAJOR,
1127         .minor = DRIVER_MINOR,
1128         .patchlevel = DRIVER_PATCHLEVEL,
1129 };
1130
1131 int tegra_drm_register_client(struct tegra_drm *tegra,
1132                               struct tegra_drm_client *client)
1133 {
1134         mutex_lock(&tegra->clients_lock);
1135         list_add_tail(&client->list, &tegra->clients);
1136         mutex_unlock(&tegra->clients_lock);
1137
1138         return 0;
1139 }
1140
1141 int tegra_drm_unregister_client(struct tegra_drm *tegra,
1142                                 struct tegra_drm_client *client)
1143 {
1144         mutex_lock(&tegra->clients_lock);
1145         list_del_init(&client->list);
1146         mutex_unlock(&tegra->clients_lock);
1147
1148         return 0;
1149 }
1150
1151 void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size,
1152                               dma_addr_t *dma)
1153 {
1154         struct iova *alloc;
1155         void *virt;
1156         gfp_t gfp;
1157         int err;
1158
1159         if (tegra->domain)
1160                 size = iova_align(&tegra->carveout.domain, size);
1161         else
1162                 size = PAGE_ALIGN(size);
1163
1164         gfp = GFP_KERNEL | __GFP_ZERO;
1165         if (!tegra->domain) {
1166                 /*
1167                  * Many units only support 32-bit addresses, even on 64-bit
1168                  * SoCs. If there is no IOMMU to translate into a 32-bit IO
1169                  * virtual address space, force allocations to be in the
1170                  * lower 32-bit range.
1171                  */
1172                 gfp |= GFP_DMA;
1173         }
1174
1175         virt = (void *)__get_free_pages(gfp, get_order(size));
1176         if (!virt)
1177                 return ERR_PTR(-ENOMEM);
1178
1179         if (!tegra->domain) {
1180                 /*
1181                  * If IOMMU is disabled, devices address physical memory
1182                  * directly.
1183                  */
1184                 *dma = virt_to_phys(virt);
1185                 return virt;
1186         }
1187
1188         alloc = alloc_iova(&tegra->carveout.domain,
1189                            size >> tegra->carveout.shift,
1190                            tegra->carveout.limit, true);
1191         if (!alloc) {
1192                 err = -EBUSY;
1193                 goto free_pages;
1194         }
1195
1196         *dma = iova_dma_addr(&tegra->carveout.domain, alloc);
1197         err = iommu_map(tegra->domain, *dma, virt_to_phys(virt),
1198                         size, IOMMU_READ | IOMMU_WRITE);
1199         if (err < 0)
1200                 goto free_iova;
1201
1202         return virt;
1203
1204 free_iova:
1205         __free_iova(&tegra->carveout.domain, alloc);
1206 free_pages:
1207         free_pages((unsigned long)virt, get_order(size));
1208
1209         return ERR_PTR(err);
1210 }
1211
1212 void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
1213                     dma_addr_t dma)
1214 {
1215         if (tegra->domain)
1216                 size = iova_align(&tegra->carveout.domain, size);
1217         else
1218                 size = PAGE_ALIGN(size);
1219
1220         if (tegra->domain) {
1221                 iommu_unmap(tegra->domain, dma, size);
1222                 free_iova(&tegra->carveout.domain,
1223                           iova_pfn(&tegra->carveout.domain, dma));
1224         }
1225
1226         free_pages((unsigned long)virt, get_order(size));
1227 }
1228
1229 static int host1x_drm_probe(struct host1x_device *dev)
1230 {
1231         struct drm_driver *driver = &tegra_drm_driver;
1232         struct drm_device *drm;
1233         int err;
1234
1235         drm = drm_dev_alloc(driver, &dev->dev);
1236         if (IS_ERR(drm))
1237                 return PTR_ERR(drm);
1238
1239         dev_set_drvdata(&dev->dev, drm);
1240
1241         err = drm_dev_register(drm, 0);
1242         if (err < 0)
1243                 goto unref;
1244
1245         return 0;
1246
1247 unref:
1248         drm_dev_unref(drm);
1249         return err;
1250 }
1251
1252 static int host1x_drm_remove(struct host1x_device *dev)
1253 {
1254         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1255
1256         drm_dev_unregister(drm);
1257         drm_dev_unref(drm);
1258
1259         return 0;
1260 }
1261
1262 #ifdef CONFIG_PM_SLEEP
1263 static int host1x_drm_suspend(struct device *dev)
1264 {
1265         struct drm_device *drm = dev_get_drvdata(dev);
1266         struct tegra_drm *tegra = drm->dev_private;
1267
1268         drm_kms_helper_poll_disable(drm);
1269         tegra_drm_fb_suspend(drm);
1270
1271         tegra->state = drm_atomic_helper_suspend(drm);
1272         if (IS_ERR(tegra->state)) {
1273                 tegra_drm_fb_resume(drm);
1274                 drm_kms_helper_poll_enable(drm);
1275                 return PTR_ERR(tegra->state);
1276         }
1277
1278         return 0;
1279 }
1280
1281 static int host1x_drm_resume(struct device *dev)
1282 {
1283         struct drm_device *drm = dev_get_drvdata(dev);
1284         struct tegra_drm *tegra = drm->dev_private;
1285
1286         drm_atomic_helper_resume(drm, tegra->state);
1287         tegra_drm_fb_resume(drm);
1288         drm_kms_helper_poll_enable(drm);
1289
1290         return 0;
1291 }
1292 #endif
1293
1294 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1295                          host1x_drm_resume);
1296
1297 static const struct of_device_id host1x_drm_subdevs[] = {
1298         { .compatible = "nvidia,tegra20-dc", },
1299         { .compatible = "nvidia,tegra20-hdmi", },
1300         { .compatible = "nvidia,tegra20-gr2d", },
1301         { .compatible = "nvidia,tegra20-gr3d", },
1302         { .compatible = "nvidia,tegra30-dc", },
1303         { .compatible = "nvidia,tegra30-hdmi", },
1304         { .compatible = "nvidia,tegra30-gr2d", },
1305         { .compatible = "nvidia,tegra30-gr3d", },
1306         { .compatible = "nvidia,tegra114-dsi", },
1307         { .compatible = "nvidia,tegra114-hdmi", },
1308         { .compatible = "nvidia,tegra114-gr3d", },
1309         { .compatible = "nvidia,tegra124-dc", },
1310         { .compatible = "nvidia,tegra124-sor", },
1311         { .compatible = "nvidia,tegra124-hdmi", },
1312         { .compatible = "nvidia,tegra124-dsi", },
1313         { .compatible = "nvidia,tegra124-vic", },
1314         { .compatible = "nvidia,tegra132-dsi", },
1315         { .compatible = "nvidia,tegra210-dc", },
1316         { .compatible = "nvidia,tegra210-dsi", },
1317         { .compatible = "nvidia,tegra210-sor", },
1318         { .compatible = "nvidia,tegra210-sor1", },
1319         { .compatible = "nvidia,tegra210-vic", },
1320         { .compatible = "nvidia,tegra186-vic", },
1321         { /* sentinel */ }
1322 };
1323
1324 static struct host1x_driver host1x_drm_driver = {
1325         .driver = {
1326                 .name = "drm",
1327                 .pm = &host1x_drm_pm_ops,
1328         },
1329         .probe = host1x_drm_probe,
1330         .remove = host1x_drm_remove,
1331         .subdevs = host1x_drm_subdevs,
1332 };
1333
1334 static struct platform_driver * const drivers[] = {
1335         &tegra_dc_driver,
1336         &tegra_hdmi_driver,
1337         &tegra_dsi_driver,
1338         &tegra_dpaux_driver,
1339         &tegra_sor_driver,
1340         &tegra_gr2d_driver,
1341         &tegra_gr3d_driver,
1342         &tegra_vic_driver,
1343 };
1344
1345 static int __init host1x_drm_init(void)
1346 {
1347         int err;
1348
1349         err = host1x_driver_register(&host1x_drm_driver);
1350         if (err < 0)
1351                 return err;
1352
1353         err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1354         if (err < 0)
1355                 goto unregister_host1x;
1356
1357         return 0;
1358
1359 unregister_host1x:
1360         host1x_driver_unregister(&host1x_drm_driver);
1361         return err;
1362 }
1363 module_init(host1x_drm_init);
1364
1365 static void __exit host1x_drm_exit(void)
1366 {
1367         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1368         host1x_driver_unregister(&host1x_drm_driver);
1369 }
1370 module_exit(host1x_drm_exit);
1371
1372 MODULE_AUTHOR("Thierry Reding <[email protected]>");
1373 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1374 MODULE_LICENSE("GPL v2");
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