Version:  2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19

Linux/drivers/gpu/drm/tegra/drm.c

  1 /*
  2  * Copyright (C) 2012 Avionic Design GmbH
  3  * Copyright (C) 2012-2013 NVIDIA CORPORATION.  All rights reserved.
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License version 2 as
  7  * published by the Free Software Foundation.
  8  */
  9 
 10 #include <linux/host1x.h>
 11 #include <linux/iommu.h>
 12 
 13 #include "drm.h"
 14 #include "gem.h"
 15 
 16 #define DRIVER_NAME "tegra"
 17 #define DRIVER_DESC "NVIDIA Tegra graphics"
 18 #define DRIVER_DATE "20120330"
 19 #define DRIVER_MAJOR 0
 20 #define DRIVER_MINOR 0
 21 #define DRIVER_PATCHLEVEL 0
 22 
 23 struct tegra_drm_file {
 24         struct list_head contexts;
 25 };
 26 
 27 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
 28 {
 29         struct host1x_device *device = to_host1x_device(drm->dev);
 30         struct tegra_drm *tegra;
 31         int err;
 32 
 33         tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
 34         if (!tegra)
 35                 return -ENOMEM;
 36 
 37         if (iommu_present(&platform_bus_type)) {
 38                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
 39                 if (IS_ERR(tegra->domain)) {
 40                         err = PTR_ERR(tegra->domain);
 41                         goto free;
 42                 }
 43 
 44                 DRM_DEBUG("IOMMU context initialized\n");
 45                 drm_mm_init(&tegra->mm, 0, SZ_2G);
 46         }
 47 
 48         mutex_init(&tegra->clients_lock);
 49         INIT_LIST_HEAD(&tegra->clients);
 50         drm->dev_private = tegra;
 51         tegra->drm = drm;
 52 
 53         drm_mode_config_init(drm);
 54 
 55         err = tegra_drm_fb_prepare(drm);
 56         if (err < 0)
 57                 goto config;
 58 
 59         drm_kms_helper_poll_init(drm);
 60 
 61         err = host1x_device_init(device);
 62         if (err < 0)
 63                 goto fbdev;
 64 
 65         /*
 66          * We don't use the drm_irq_install() helpers provided by the DRM
 67          * core, so we need to set this manually in order to allow the
 68          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
 69          */
 70         drm->irq_enabled = true;
 71 
 72         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
 73         if (err < 0)
 74                 goto device;
 75 
 76         err = tegra_drm_fb_init(drm);
 77         if (err < 0)
 78                 goto vblank;
 79 
 80         return 0;
 81 
 82 vblank:
 83         drm_vblank_cleanup(drm);
 84 device:
 85         host1x_device_exit(device);
 86 fbdev:
 87         drm_kms_helper_poll_fini(drm);
 88         tegra_drm_fb_free(drm);
 89 config:
 90         drm_mode_config_cleanup(drm);
 91 
 92         if (tegra->domain) {
 93                 iommu_domain_free(tegra->domain);
 94                 drm_mm_takedown(&tegra->mm);
 95         }
 96 free:
 97         kfree(tegra);
 98         return err;
 99 }
100 
101 static int tegra_drm_unload(struct drm_device *drm)
102 {
103         struct host1x_device *device = to_host1x_device(drm->dev);
104         struct tegra_drm *tegra = drm->dev_private;
105         int err;
106 
107         drm_kms_helper_poll_fini(drm);
108         tegra_drm_fb_exit(drm);
109         drm_vblank_cleanup(drm);
110         drm_mode_config_cleanup(drm);
111 
112         err = host1x_device_exit(device);
113         if (err < 0)
114                 return err;
115 
116         if (tegra->domain) {
117                 iommu_domain_free(tegra->domain);
118                 drm_mm_takedown(&tegra->mm);
119         }
120 
121         kfree(tegra);
122 
123         return 0;
124 }
125 
126 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
127 {
128         struct tegra_drm_file *fpriv;
129 
130         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
131         if (!fpriv)
132                 return -ENOMEM;
133 
134         INIT_LIST_HEAD(&fpriv->contexts);
135         filp->driver_priv = fpriv;
136 
137         return 0;
138 }
139 
140 static void tegra_drm_context_free(struct tegra_drm_context *context)
141 {
142         context->client->ops->close_channel(context);
143         kfree(context);
144 }
145 
146 static void tegra_drm_lastclose(struct drm_device *drm)
147 {
148 #ifdef CONFIG_DRM_TEGRA_FBDEV
149         struct tegra_drm *tegra = drm->dev_private;
150 
151         tegra_fbdev_restore_mode(tegra->fbdev);
152 #endif
153 }
154 
155 static struct host1x_bo *
156 host1x_bo_lookup(struct drm_device *drm, struct drm_file *file, u32 handle)
157 {
158         struct drm_gem_object *gem;
159         struct tegra_bo *bo;
160 
161         gem = drm_gem_object_lookup(drm, file, handle);
162         if (!gem)
163                 return NULL;
164 
165         mutex_lock(&drm->struct_mutex);
166         drm_gem_object_unreference(gem);
167         mutex_unlock(&drm->struct_mutex);
168 
169         bo = to_tegra_bo(gem);
170         return &bo->base;
171 }
172 
173 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
174                                        struct drm_tegra_reloc __user *src,
175                                        struct drm_device *drm,
176                                        struct drm_file *file)
177 {
178         u32 cmdbuf, target;
179         int err;
180 
181         err = get_user(cmdbuf, &src->cmdbuf.handle);
182         if (err < 0)
183                 return err;
184 
185         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
186         if (err < 0)
187                 return err;
188 
189         err = get_user(target, &src->target.handle);
190         if (err < 0)
191                 return err;
192 
193         err = get_user(dest->target.offset, &src->cmdbuf.offset);
194         if (err < 0)
195                 return err;
196 
197         err = get_user(dest->shift, &src->shift);
198         if (err < 0)
199                 return err;
200 
201         dest->cmdbuf.bo = host1x_bo_lookup(drm, file, cmdbuf);
202         if (!dest->cmdbuf.bo)
203                 return -ENOENT;
204 
205         dest->target.bo = host1x_bo_lookup(drm, file, target);
206         if (!dest->target.bo)
207                 return -ENOENT;
208 
209         return 0;
210 }
211 
212 int tegra_drm_submit(struct tegra_drm_context *context,
213                      struct drm_tegra_submit *args, struct drm_device *drm,
214                      struct drm_file *file)
215 {
216         unsigned int num_cmdbufs = args->num_cmdbufs;
217         unsigned int num_relocs = args->num_relocs;
218         unsigned int num_waitchks = args->num_waitchks;
219         struct drm_tegra_cmdbuf __user *cmdbufs =
220                 (void __user *)(uintptr_t)args->cmdbufs;
221         struct drm_tegra_reloc __user *relocs =
222                 (void __user *)(uintptr_t)args->relocs;
223         struct drm_tegra_waitchk __user *waitchks =
224                 (void __user *)(uintptr_t)args->waitchks;
225         struct drm_tegra_syncpt syncpt;
226         struct host1x_job *job;
227         int err;
228 
229         /* We don't yet support other than one syncpt_incr struct per submit */
230         if (args->num_syncpts != 1)
231                 return -EINVAL;
232 
233         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
234                                args->num_relocs, args->num_waitchks);
235         if (!job)
236                 return -ENOMEM;
237 
238         job->num_relocs = args->num_relocs;
239         job->num_waitchk = args->num_waitchks;
240         job->client = (u32)args->context;
241         job->class = context->client->base.class;
242         job->serialize = true;
243 
244         while (num_cmdbufs) {
245                 struct drm_tegra_cmdbuf cmdbuf;
246                 struct host1x_bo *bo;
247 
248                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
249                         err = -EFAULT;
250                         goto fail;
251                 }
252 
253                 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
254                 if (!bo) {
255                         err = -ENOENT;
256                         goto fail;
257                 }
258 
259                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
260                 num_cmdbufs--;
261                 cmdbufs++;
262         }
263 
264         /* copy and resolve relocations from submit */
265         while (num_relocs--) {
266                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
267                                                   &relocs[num_relocs], drm,
268                                                   file);
269                 if (err < 0)
270                         goto fail;
271         }
272 
273         if (copy_from_user(job->waitchk, waitchks,
274                            sizeof(*waitchks) * num_waitchks)) {
275                 err = -EFAULT;
276                 goto fail;
277         }
278 
279         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
280                            sizeof(syncpt))) {
281                 err = -EFAULT;
282                 goto fail;
283         }
284 
285         job->is_addr_reg = context->client->ops->is_addr_reg;
286         job->syncpt_incrs = syncpt.incrs;
287         job->syncpt_id = syncpt.id;
288         job->timeout = 10000;
289 
290         if (args->timeout && args->timeout < 10000)
291                 job->timeout = args->timeout;
292 
293         err = host1x_job_pin(job, context->client->base.dev);
294         if (err)
295                 goto fail;
296 
297         err = host1x_job_submit(job);
298         if (err)
299                 goto fail_submit;
300 
301         args->fence = job->syncpt_end;
302 
303         host1x_job_put(job);
304         return 0;
305 
306 fail_submit:
307         host1x_job_unpin(job);
308 fail:
309         host1x_job_put(job);
310         return err;
311 }
312 
313 
314 #ifdef CONFIG_DRM_TEGRA_STAGING
315 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
316 {
317         return (struct tegra_drm_context *)(uintptr_t)context;
318 }
319 
320 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
321                                         struct tegra_drm_context *context)
322 {
323         struct tegra_drm_context *ctx;
324 
325         list_for_each_entry(ctx, &file->contexts, list)
326                 if (ctx == context)
327                         return true;
328 
329         return false;
330 }
331 
332 static int tegra_gem_create(struct drm_device *drm, void *data,
333                             struct drm_file *file)
334 {
335         struct drm_tegra_gem_create *args = data;
336         struct tegra_bo *bo;
337 
338         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
339                                          &args->handle);
340         if (IS_ERR(bo))
341                 return PTR_ERR(bo);
342 
343         return 0;
344 }
345 
346 static int tegra_gem_mmap(struct drm_device *drm, void *data,
347                           struct drm_file *file)
348 {
349         struct drm_tegra_gem_mmap *args = data;
350         struct drm_gem_object *gem;
351         struct tegra_bo *bo;
352 
353         gem = drm_gem_object_lookup(drm, file, args->handle);
354         if (!gem)
355                 return -EINVAL;
356 
357         bo = to_tegra_bo(gem);
358 
359         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
360 
361         drm_gem_object_unreference(gem);
362 
363         return 0;
364 }
365 
366 static int tegra_syncpt_read(struct drm_device *drm, void *data,
367                              struct drm_file *file)
368 {
369         struct host1x *host = dev_get_drvdata(drm->dev->parent);
370         struct drm_tegra_syncpt_read *args = data;
371         struct host1x_syncpt *sp;
372 
373         sp = host1x_syncpt_get(host, args->id);
374         if (!sp)
375                 return -EINVAL;
376 
377         args->value = host1x_syncpt_read_min(sp);
378         return 0;
379 }
380 
381 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
382                              struct drm_file *file)
383 {
384         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
385         struct drm_tegra_syncpt_incr *args = data;
386         struct host1x_syncpt *sp;
387 
388         sp = host1x_syncpt_get(host1x, args->id);
389         if (!sp)
390                 return -EINVAL;
391 
392         return host1x_syncpt_incr(sp);
393 }
394 
395 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
396                              struct drm_file *file)
397 {
398         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
399         struct drm_tegra_syncpt_wait *args = data;
400         struct host1x_syncpt *sp;
401 
402         sp = host1x_syncpt_get(host1x, args->id);
403         if (!sp)
404                 return -EINVAL;
405 
406         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
407                                   &args->value);
408 }
409 
410 static int tegra_open_channel(struct drm_device *drm, void *data,
411                               struct drm_file *file)
412 {
413         struct tegra_drm_file *fpriv = file->driver_priv;
414         struct tegra_drm *tegra = drm->dev_private;
415         struct drm_tegra_open_channel *args = data;
416         struct tegra_drm_context *context;
417         struct tegra_drm_client *client;
418         int err = -ENODEV;
419 
420         context = kzalloc(sizeof(*context), GFP_KERNEL);
421         if (!context)
422                 return -ENOMEM;
423 
424         list_for_each_entry(client, &tegra->clients, list)
425                 if (client->base.class == args->client) {
426                         err = client->ops->open_channel(client, context);
427                         if (err)
428                                 break;
429 
430                         list_add(&context->list, &fpriv->contexts);
431                         args->context = (uintptr_t)context;
432                         context->client = client;
433                         return 0;
434                 }
435 
436         kfree(context);
437         return err;
438 }
439 
440 static int tegra_close_channel(struct drm_device *drm, void *data,
441                                struct drm_file *file)
442 {
443         struct tegra_drm_file *fpriv = file->driver_priv;
444         struct drm_tegra_close_channel *args = data;
445         struct tegra_drm_context *context;
446 
447         context = tegra_drm_get_context(args->context);
448 
449         if (!tegra_drm_file_owns_context(fpriv, context))
450                 return -EINVAL;
451 
452         list_del(&context->list);
453         tegra_drm_context_free(context);
454 
455         return 0;
456 }
457 
458 static int tegra_get_syncpt(struct drm_device *drm, void *data,
459                             struct drm_file *file)
460 {
461         struct tegra_drm_file *fpriv = file->driver_priv;
462         struct drm_tegra_get_syncpt *args = data;
463         struct tegra_drm_context *context;
464         struct host1x_syncpt *syncpt;
465 
466         context = tegra_drm_get_context(args->context);
467 
468         if (!tegra_drm_file_owns_context(fpriv, context))
469                 return -ENODEV;
470 
471         if (args->index >= context->client->base.num_syncpts)
472                 return -EINVAL;
473 
474         syncpt = context->client->base.syncpts[args->index];
475         args->id = host1x_syncpt_id(syncpt);
476 
477         return 0;
478 }
479 
480 static int tegra_submit(struct drm_device *drm, void *data,
481                         struct drm_file *file)
482 {
483         struct tegra_drm_file *fpriv = file->driver_priv;
484         struct drm_tegra_submit *args = data;
485         struct tegra_drm_context *context;
486 
487         context = tegra_drm_get_context(args->context);
488 
489         if (!tegra_drm_file_owns_context(fpriv, context))
490                 return -ENODEV;
491 
492         return context->client->ops->submit(context, args, drm, file);
493 }
494 
495 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
496                                  struct drm_file *file)
497 {
498         struct tegra_drm_file *fpriv = file->driver_priv;
499         struct drm_tegra_get_syncpt_base *args = data;
500         struct tegra_drm_context *context;
501         struct host1x_syncpt_base *base;
502         struct host1x_syncpt *syncpt;
503 
504         context = tegra_drm_get_context(args->context);
505 
506         if (!tegra_drm_file_owns_context(fpriv, context))
507                 return -ENODEV;
508 
509         if (args->syncpt >= context->client->base.num_syncpts)
510                 return -EINVAL;
511 
512         syncpt = context->client->base.syncpts[args->syncpt];
513 
514         base = host1x_syncpt_get_base(syncpt);
515         if (!base)
516                 return -ENXIO;
517 
518         args->id = host1x_syncpt_base_id(base);
519 
520         return 0;
521 }
522 
523 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
524                                 struct drm_file *file)
525 {
526         struct drm_tegra_gem_set_tiling *args = data;
527         enum tegra_bo_tiling_mode mode;
528         struct drm_gem_object *gem;
529         unsigned long value = 0;
530         struct tegra_bo *bo;
531 
532         switch (args->mode) {
533         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
534                 mode = TEGRA_BO_TILING_MODE_PITCH;
535 
536                 if (args->value != 0)
537                         return -EINVAL;
538 
539                 break;
540 
541         case DRM_TEGRA_GEM_TILING_MODE_TILED:
542                 mode = TEGRA_BO_TILING_MODE_TILED;
543 
544                 if (args->value != 0)
545                         return -EINVAL;
546 
547                 break;
548 
549         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
550                 mode = TEGRA_BO_TILING_MODE_BLOCK;
551 
552                 if (args->value > 5)
553                         return -EINVAL;
554 
555                 value = args->value;
556                 break;
557 
558         default:
559                 return -EINVAL;
560         }
561 
562         gem = drm_gem_object_lookup(drm, file, args->handle);
563         if (!gem)
564                 return -ENOENT;
565 
566         bo = to_tegra_bo(gem);
567 
568         bo->tiling.mode = mode;
569         bo->tiling.value = value;
570 
571         drm_gem_object_unreference(gem);
572 
573         return 0;
574 }
575 
576 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
577                                 struct drm_file *file)
578 {
579         struct drm_tegra_gem_get_tiling *args = data;
580         struct drm_gem_object *gem;
581         struct tegra_bo *bo;
582         int err = 0;
583 
584         gem = drm_gem_object_lookup(drm, file, args->handle);
585         if (!gem)
586                 return -ENOENT;
587 
588         bo = to_tegra_bo(gem);
589 
590         switch (bo->tiling.mode) {
591         case TEGRA_BO_TILING_MODE_PITCH:
592                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
593                 args->value = 0;
594                 break;
595 
596         case TEGRA_BO_TILING_MODE_TILED:
597                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
598                 args->value = 0;
599                 break;
600 
601         case TEGRA_BO_TILING_MODE_BLOCK:
602                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
603                 args->value = bo->tiling.value;
604                 break;
605 
606         default:
607                 err = -EINVAL;
608                 break;
609         }
610 
611         drm_gem_object_unreference(gem);
612 
613         return err;
614 }
615 
616 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
617                                struct drm_file *file)
618 {
619         struct drm_tegra_gem_set_flags *args = data;
620         struct drm_gem_object *gem;
621         struct tegra_bo *bo;
622 
623         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
624                 return -EINVAL;
625 
626         gem = drm_gem_object_lookup(drm, file, args->handle);
627         if (!gem)
628                 return -ENOENT;
629 
630         bo = to_tegra_bo(gem);
631         bo->flags = 0;
632 
633         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
634                 bo->flags |= TEGRA_BO_BOTTOM_UP;
635 
636         drm_gem_object_unreference(gem);
637 
638         return 0;
639 }
640 
641 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
642                                struct drm_file *file)
643 {
644         struct drm_tegra_gem_get_flags *args = data;
645         struct drm_gem_object *gem;
646         struct tegra_bo *bo;
647 
648         gem = drm_gem_object_lookup(drm, file, args->handle);
649         if (!gem)
650                 return -ENOENT;
651 
652         bo = to_tegra_bo(gem);
653         args->flags = 0;
654 
655         if (bo->flags & TEGRA_BO_BOTTOM_UP)
656                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
657 
658         drm_gem_object_unreference(gem);
659 
660         return 0;
661 }
662 #endif
663 
664 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
665 #ifdef CONFIG_DRM_TEGRA_STAGING
666         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED),
667         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
668         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
669         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
670         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
671         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
672         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
673         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
674         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
675         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, DRM_UNLOCKED),
676         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, DRM_UNLOCKED),
677         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, DRM_UNLOCKED),
678         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, DRM_UNLOCKED),
679         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, DRM_UNLOCKED),
680 #endif
681 };
682 
683 static const struct file_operations tegra_drm_fops = {
684         .owner = THIS_MODULE,
685         .open = drm_open,
686         .release = drm_release,
687         .unlocked_ioctl = drm_ioctl,
688         .mmap = tegra_drm_mmap,
689         .poll = drm_poll,
690         .read = drm_read,
691 #ifdef CONFIG_COMPAT
692         .compat_ioctl = drm_compat_ioctl,
693 #endif
694         .llseek = noop_llseek,
695 };
696 
697 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
698                                              unsigned int pipe)
699 {
700         struct drm_crtc *crtc;
701 
702         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
703                 if (pipe == drm_crtc_index(crtc))
704                         return crtc;
705         }
706 
707         return NULL;
708 }
709 
710 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm, int pipe)
711 {
712         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
713 
714         if (!crtc)
715                 return 0;
716 
717         /* TODO: implement real hardware counter using syncpoints */
718         return drm_crtc_vblank_count(crtc);
719 }
720 
721 static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
722 {
723         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
724         struct tegra_dc *dc = to_tegra_dc(crtc);
725 
726         if (!crtc)
727                 return -ENODEV;
728 
729         tegra_dc_enable_vblank(dc);
730 
731         return 0;
732 }
733 
734 static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
735 {
736         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
737         struct tegra_dc *dc = to_tegra_dc(crtc);
738 
739         if (crtc)
740                 tegra_dc_disable_vblank(dc);
741 }
742 
743 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
744 {
745         struct tegra_drm_file *fpriv = file->driver_priv;
746         struct tegra_drm_context *context, *tmp;
747         struct drm_crtc *crtc;
748 
749         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
750                 tegra_dc_cancel_page_flip(crtc, file);
751 
752         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
753                 tegra_drm_context_free(context);
754 
755         kfree(fpriv);
756 }
757 
758 #ifdef CONFIG_DEBUG_FS
759 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
760 {
761         struct drm_info_node *node = (struct drm_info_node *)s->private;
762         struct drm_device *drm = node->minor->dev;
763         struct drm_framebuffer *fb;
764 
765         mutex_lock(&drm->mode_config.fb_lock);
766 
767         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
768                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
769                            fb->base.id, fb->width, fb->height, fb->depth,
770                            fb->bits_per_pixel,
771                            atomic_read(&fb->refcount.refcount));
772         }
773 
774         mutex_unlock(&drm->mode_config.fb_lock);
775 
776         return 0;
777 }
778 
779 static struct drm_info_list tegra_debugfs_list[] = {
780         { "framebuffers", tegra_debugfs_framebuffers, 0 },
781 };
782 
783 static int tegra_debugfs_init(struct drm_minor *minor)
784 {
785         return drm_debugfs_create_files(tegra_debugfs_list,
786                                         ARRAY_SIZE(tegra_debugfs_list),
787                                         minor->debugfs_root, minor);
788 }
789 
790 static void tegra_debugfs_cleanup(struct drm_minor *minor)
791 {
792         drm_debugfs_remove_files(tegra_debugfs_list,
793                                  ARRAY_SIZE(tegra_debugfs_list), minor);
794 }
795 #endif
796 
797 static struct drm_driver tegra_drm_driver = {
798         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
799         .load = tegra_drm_load,
800         .unload = tegra_drm_unload,
801         .open = tegra_drm_open,
802         .preclose = tegra_drm_preclose,
803         .lastclose = tegra_drm_lastclose,
804 
805         .get_vblank_counter = tegra_drm_get_vblank_counter,
806         .enable_vblank = tegra_drm_enable_vblank,
807         .disable_vblank = tegra_drm_disable_vblank,
808 
809 #if defined(CONFIG_DEBUG_FS)
810         .debugfs_init = tegra_debugfs_init,
811         .debugfs_cleanup = tegra_debugfs_cleanup,
812 #endif
813 
814         .gem_free_object = tegra_bo_free_object,
815         .gem_vm_ops = &tegra_bo_vm_ops,
816 
817         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
818         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
819         .gem_prime_export = tegra_gem_prime_export,
820         .gem_prime_import = tegra_gem_prime_import,
821 
822         .dumb_create = tegra_bo_dumb_create,
823         .dumb_map_offset = tegra_bo_dumb_map_offset,
824         .dumb_destroy = drm_gem_dumb_destroy,
825 
826         .ioctls = tegra_drm_ioctls,
827         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
828         .fops = &tegra_drm_fops,
829 
830         .name = DRIVER_NAME,
831         .desc = DRIVER_DESC,
832         .date = DRIVER_DATE,
833         .major = DRIVER_MAJOR,
834         .minor = DRIVER_MINOR,
835         .patchlevel = DRIVER_PATCHLEVEL,
836 };
837 
838 int tegra_drm_register_client(struct tegra_drm *tegra,
839                               struct tegra_drm_client *client)
840 {
841         mutex_lock(&tegra->clients_lock);
842         list_add_tail(&client->list, &tegra->clients);
843         mutex_unlock(&tegra->clients_lock);
844 
845         return 0;
846 }
847 
848 int tegra_drm_unregister_client(struct tegra_drm *tegra,
849                                 struct tegra_drm_client *client)
850 {
851         mutex_lock(&tegra->clients_lock);
852         list_del_init(&client->list);
853         mutex_unlock(&tegra->clients_lock);
854 
855         return 0;
856 }
857 
858 static int host1x_drm_probe(struct host1x_device *dev)
859 {
860         struct drm_driver *driver = &tegra_drm_driver;
861         struct drm_device *drm;
862         int err;
863 
864         drm = drm_dev_alloc(driver, &dev->dev);
865         if (!drm)
866                 return -ENOMEM;
867 
868         drm_dev_set_unique(drm, dev_name(&dev->dev));
869         dev_set_drvdata(&dev->dev, drm);
870 
871         err = drm_dev_register(drm, 0);
872         if (err < 0)
873                 goto unref;
874 
875         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
876                  driver->major, driver->minor, driver->patchlevel,
877                  driver->date, drm->primary->index);
878 
879         return 0;
880 
881 unref:
882         drm_dev_unref(drm);
883         return err;
884 }
885 
886 static int host1x_drm_remove(struct host1x_device *dev)
887 {
888         struct drm_device *drm = dev_get_drvdata(&dev->dev);
889 
890         drm_dev_unregister(drm);
891         drm_dev_unref(drm);
892 
893         return 0;
894 }
895 
896 static const struct of_device_id host1x_drm_subdevs[] = {
897         { .compatible = "nvidia,tegra20-dc", },
898         { .compatible = "nvidia,tegra20-hdmi", },
899         { .compatible = "nvidia,tegra20-gr2d", },
900         { .compatible = "nvidia,tegra20-gr3d", },
901         { .compatible = "nvidia,tegra30-dc", },
902         { .compatible = "nvidia,tegra30-hdmi", },
903         { .compatible = "nvidia,tegra30-gr2d", },
904         { .compatible = "nvidia,tegra30-gr3d", },
905         { .compatible = "nvidia,tegra114-dsi", },
906         { .compatible = "nvidia,tegra114-hdmi", },
907         { .compatible = "nvidia,tegra114-gr3d", },
908         { .compatible = "nvidia,tegra124-dc", },
909         { .compatible = "nvidia,tegra124-sor", },
910         { .compatible = "nvidia,tegra124-hdmi", },
911         { /* sentinel */ }
912 };
913 
914 static struct host1x_driver host1x_drm_driver = {
915         .name = "drm",
916         .probe = host1x_drm_probe,
917         .remove = host1x_drm_remove,
918         .subdevs = host1x_drm_subdevs,
919 };
920 
921 static int __init host1x_drm_init(void)
922 {
923         int err;
924 
925         err = host1x_driver_register(&host1x_drm_driver);
926         if (err < 0)
927                 return err;
928 
929         err = platform_driver_register(&tegra_dc_driver);
930         if (err < 0)
931                 goto unregister_host1x;
932 
933         err = platform_driver_register(&tegra_dsi_driver);
934         if (err < 0)
935                 goto unregister_dc;
936 
937         err = platform_driver_register(&tegra_sor_driver);
938         if (err < 0)
939                 goto unregister_dsi;
940 
941         err = platform_driver_register(&tegra_hdmi_driver);
942         if (err < 0)
943                 goto unregister_sor;
944 
945         err = platform_driver_register(&tegra_dpaux_driver);
946         if (err < 0)
947                 goto unregister_hdmi;
948 
949         err = platform_driver_register(&tegra_gr2d_driver);
950         if (err < 0)
951                 goto unregister_dpaux;
952 
953         err = platform_driver_register(&tegra_gr3d_driver);
954         if (err < 0)
955                 goto unregister_gr2d;
956 
957         return 0;
958 
959 unregister_gr2d:
960         platform_driver_unregister(&tegra_gr2d_driver);
961 unregister_dpaux:
962         platform_driver_unregister(&tegra_dpaux_driver);
963 unregister_hdmi:
964         platform_driver_unregister(&tegra_hdmi_driver);
965 unregister_sor:
966         platform_driver_unregister(&tegra_sor_driver);
967 unregister_dsi:
968         platform_driver_unregister(&tegra_dsi_driver);
969 unregister_dc:
970         platform_driver_unregister(&tegra_dc_driver);
971 unregister_host1x:
972         host1x_driver_unregister(&host1x_drm_driver);
973         return err;
974 }
975 module_init(host1x_drm_init);
976 
977 static void __exit host1x_drm_exit(void)
978 {
979         platform_driver_unregister(&tegra_gr3d_driver);
980         platform_driver_unregister(&tegra_gr2d_driver);
981         platform_driver_unregister(&tegra_dpaux_driver);
982         platform_driver_unregister(&tegra_hdmi_driver);
983         platform_driver_unregister(&tegra_sor_driver);
984         platform_driver_unregister(&tegra_dsi_driver);
985         platform_driver_unregister(&tegra_dc_driver);
986         host1x_driver_unregister(&host1x_drm_driver);
987 }
988 module_exit(host1x_drm_exit);
989 
990 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
991 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
992 MODULE_LICENSE("GPL v2");
993 

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