Version:  2.0.40 2.2.26 2.4.37 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 4.0

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/drm_atomic.h>
 14 #include <drm/drm_atomic_helper.h>
 15 
 16 #include "drm.h"
 17 #include "gem.h"
 18 
 19 #define DRIVER_NAME "tegra"
 20 #define DRIVER_DESC "NVIDIA Tegra graphics"
 21 #define DRIVER_DATE "20120330"
 22 #define DRIVER_MAJOR 0
 23 #define DRIVER_MINOR 0
 24 #define DRIVER_PATCHLEVEL 0
 25 
 26 struct tegra_drm_file {
 27         struct list_head contexts;
 28 };
 29 
 30 static void tegra_atomic_schedule(struct tegra_drm *tegra,
 31                                   struct drm_atomic_state *state)
 32 {
 33         tegra->commit.state = state;
 34         schedule_work(&tegra->commit.work);
 35 }
 36 
 37 static void tegra_atomic_complete(struct tegra_drm *tegra,
 38                                   struct drm_atomic_state *state)
 39 {
 40         struct drm_device *drm = tegra->drm;
 41 
 42         /*
 43          * Everything below can be run asynchronously without the need to grab
 44          * any modeset locks at all under one condition: It must be guaranteed
 45          * that the asynchronous work has either been cancelled (if the driver
 46          * supports it, which at least requires that the framebuffers get
 47          * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
 48          * before the new state gets committed on the software side with
 49          * drm_atomic_helper_swap_state().
 50          *
 51          * This scheme allows new atomic state updates to be prepared and
 52          * checked in parallel to the asynchronous completion of the previous
 53          * update. Which is important since compositors need to figure out the
 54          * composition of the next frame right after having submitted the
 55          * current layout.
 56          */
 57 
 58         drm_atomic_helper_commit_pre_planes(drm, state);
 59         drm_atomic_helper_commit_planes(drm, state);
 60         drm_atomic_helper_commit_post_planes(drm, state);
 61 
 62         drm_atomic_helper_wait_for_vblanks(drm, state);
 63 
 64         drm_atomic_helper_cleanup_planes(drm, state);
 65         drm_atomic_state_free(state);
 66 }
 67 
 68 static void tegra_atomic_work(struct work_struct *work)
 69 {
 70         struct tegra_drm *tegra = container_of(work, struct tegra_drm,
 71                                                commit.work);
 72 
 73         tegra_atomic_complete(tegra, tegra->commit.state);
 74 }
 75 
 76 static int tegra_atomic_commit(struct drm_device *drm,
 77                                struct drm_atomic_state *state, bool async)
 78 {
 79         struct tegra_drm *tegra = drm->dev_private;
 80         int err;
 81 
 82         err = drm_atomic_helper_prepare_planes(drm, state);
 83         if (err)
 84                 return err;
 85 
 86         /* serialize outstanding asynchronous commits */
 87         mutex_lock(&tegra->commit.lock);
 88         flush_work(&tegra->commit.work);
 89 
 90         /*
 91          * This is the point of no return - everything below never fails except
 92          * when the hw goes bonghits. Which means we can commit the new state on
 93          * the software side now.
 94          */
 95 
 96         drm_atomic_helper_swap_state(drm, state);
 97 
 98         if (async)
 99                 tegra_atomic_schedule(tegra, state);
100         else
101                 tegra_atomic_complete(tegra, state);
102 
103         mutex_unlock(&tegra->commit.lock);
104         return 0;
105 }
106 
107 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
108         .fb_create = tegra_fb_create,
109 #ifdef CONFIG_DRM_TEGRA_FBDEV
110         .output_poll_changed = tegra_fb_output_poll_changed,
111 #endif
112         .atomic_check = drm_atomic_helper_check,
113         .atomic_commit = tegra_atomic_commit,
114 };
115 
116 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
117 {
118         struct host1x_device *device = to_host1x_device(drm->dev);
119         struct tegra_drm *tegra;
120         int err;
121 
122         tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
123         if (!tegra)
124                 return -ENOMEM;
125 
126         if (iommu_present(&platform_bus_type)) {
127                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
128                 if (!tegra->domain) {
129                         err = -ENOMEM;
130                         goto free;
131                 }
132 
133                 DRM_DEBUG("IOMMU context initialized\n");
134                 drm_mm_init(&tegra->mm, 0, SZ_2G);
135         }
136 
137         mutex_init(&tegra->clients_lock);
138         INIT_LIST_HEAD(&tegra->clients);
139 
140         mutex_init(&tegra->commit.lock);
141         INIT_WORK(&tegra->commit.work, tegra_atomic_work);
142 
143         drm->dev_private = tegra;
144         tegra->drm = drm;
145 
146         drm_mode_config_init(drm);
147 
148         drm->mode_config.min_width = 0;
149         drm->mode_config.min_height = 0;
150 
151         drm->mode_config.max_width = 4096;
152         drm->mode_config.max_height = 4096;
153 
154         drm->mode_config.funcs = &tegra_drm_mode_funcs;
155 
156         err = tegra_drm_fb_prepare(drm);
157         if (err < 0)
158                 goto config;
159 
160         drm_kms_helper_poll_init(drm);
161 
162         err = host1x_device_init(device);
163         if (err < 0)
164                 goto fbdev;
165 
166         drm_mode_config_reset(drm);
167 
168         /*
169          * We don't use the drm_irq_install() helpers provided by the DRM
170          * core, so we need to set this manually in order to allow the
171          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
172          */
173         drm->irq_enabled = true;
174 
175         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
176         if (err < 0)
177                 goto device;
178 
179         err = tegra_drm_fb_init(drm);
180         if (err < 0)
181                 goto vblank;
182 
183         return 0;
184 
185 vblank:
186         drm_vblank_cleanup(drm);
187 device:
188         host1x_device_exit(device);
189 fbdev:
190         drm_kms_helper_poll_fini(drm);
191         tegra_drm_fb_free(drm);
192 config:
193         drm_mode_config_cleanup(drm);
194 
195         if (tegra->domain) {
196                 iommu_domain_free(tegra->domain);
197                 drm_mm_takedown(&tegra->mm);
198         }
199 free:
200         kfree(tegra);
201         return err;
202 }
203 
204 static int tegra_drm_unload(struct drm_device *drm)
205 {
206         struct host1x_device *device = to_host1x_device(drm->dev);
207         struct tegra_drm *tegra = drm->dev_private;
208         int err;
209 
210         drm_kms_helper_poll_fini(drm);
211         tegra_drm_fb_exit(drm);
212         drm_mode_config_cleanup(drm);
213         drm_vblank_cleanup(drm);
214 
215         err = host1x_device_exit(device);
216         if (err < 0)
217                 return err;
218 
219         if (tegra->domain) {
220                 iommu_domain_free(tegra->domain);
221                 drm_mm_takedown(&tegra->mm);
222         }
223 
224         kfree(tegra);
225 
226         return 0;
227 }
228 
229 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
230 {
231         struct tegra_drm_file *fpriv;
232 
233         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
234         if (!fpriv)
235                 return -ENOMEM;
236 
237         INIT_LIST_HEAD(&fpriv->contexts);
238         filp->driver_priv = fpriv;
239 
240         return 0;
241 }
242 
243 static void tegra_drm_context_free(struct tegra_drm_context *context)
244 {
245         context->client->ops->close_channel(context);
246         kfree(context);
247 }
248 
249 static void tegra_drm_lastclose(struct drm_device *drm)
250 {
251 #ifdef CONFIG_DRM_TEGRA_FBDEV
252         struct tegra_drm *tegra = drm->dev_private;
253 
254         tegra_fbdev_restore_mode(tegra->fbdev);
255 #endif
256 }
257 
258 static struct host1x_bo *
259 host1x_bo_lookup(struct drm_device *drm, struct drm_file *file, u32 handle)
260 {
261         struct drm_gem_object *gem;
262         struct tegra_bo *bo;
263 
264         gem = drm_gem_object_lookup(drm, file, handle);
265         if (!gem)
266                 return NULL;
267 
268         mutex_lock(&drm->struct_mutex);
269         drm_gem_object_unreference(gem);
270         mutex_unlock(&drm->struct_mutex);
271 
272         bo = to_tegra_bo(gem);
273         return &bo->base;
274 }
275 
276 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
277                                        struct drm_tegra_reloc __user *src,
278                                        struct drm_device *drm,
279                                        struct drm_file *file)
280 {
281         u32 cmdbuf, target;
282         int err;
283 
284         err = get_user(cmdbuf, &src->cmdbuf.handle);
285         if (err < 0)
286                 return err;
287 
288         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
289         if (err < 0)
290                 return err;
291 
292         err = get_user(target, &src->target.handle);
293         if (err < 0)
294                 return err;
295 
296         err = get_user(dest->target.offset, &src->target.offset);
297         if (err < 0)
298                 return err;
299 
300         err = get_user(dest->shift, &src->shift);
301         if (err < 0)
302                 return err;
303 
304         dest->cmdbuf.bo = host1x_bo_lookup(drm, file, cmdbuf);
305         if (!dest->cmdbuf.bo)
306                 return -ENOENT;
307 
308         dest->target.bo = host1x_bo_lookup(drm, file, target);
309         if (!dest->target.bo)
310                 return -ENOENT;
311 
312         return 0;
313 }
314 
315 int tegra_drm_submit(struct tegra_drm_context *context,
316                      struct drm_tegra_submit *args, struct drm_device *drm,
317                      struct drm_file *file)
318 {
319         unsigned int num_cmdbufs = args->num_cmdbufs;
320         unsigned int num_relocs = args->num_relocs;
321         unsigned int num_waitchks = args->num_waitchks;
322         struct drm_tegra_cmdbuf __user *cmdbufs =
323                 (void __user *)(uintptr_t)args->cmdbufs;
324         struct drm_tegra_reloc __user *relocs =
325                 (void __user *)(uintptr_t)args->relocs;
326         struct drm_tegra_waitchk __user *waitchks =
327                 (void __user *)(uintptr_t)args->waitchks;
328         struct drm_tegra_syncpt syncpt;
329         struct host1x_job *job;
330         int err;
331 
332         /* We don't yet support other than one syncpt_incr struct per submit */
333         if (args->num_syncpts != 1)
334                 return -EINVAL;
335 
336         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
337                                args->num_relocs, args->num_waitchks);
338         if (!job)
339                 return -ENOMEM;
340 
341         job->num_relocs = args->num_relocs;
342         job->num_waitchk = args->num_waitchks;
343         job->client = (u32)args->context;
344         job->class = context->client->base.class;
345         job->serialize = true;
346 
347         while (num_cmdbufs) {
348                 struct drm_tegra_cmdbuf cmdbuf;
349                 struct host1x_bo *bo;
350 
351                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
352                         err = -EFAULT;
353                         goto fail;
354                 }
355 
356                 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
357                 if (!bo) {
358                         err = -ENOENT;
359                         goto fail;
360                 }
361 
362                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
363                 num_cmdbufs--;
364                 cmdbufs++;
365         }
366 
367         /* copy and resolve relocations from submit */
368         while (num_relocs--) {
369                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
370                                                   &relocs[num_relocs], drm,
371                                                   file);
372                 if (err < 0)
373                         goto fail;
374         }
375 
376         if (copy_from_user(job->waitchk, waitchks,
377                            sizeof(*waitchks) * num_waitchks)) {
378                 err = -EFAULT;
379                 goto fail;
380         }
381 
382         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
383                            sizeof(syncpt))) {
384                 err = -EFAULT;
385                 goto fail;
386         }
387 
388         job->is_addr_reg = context->client->ops->is_addr_reg;
389         job->syncpt_incrs = syncpt.incrs;
390         job->syncpt_id = syncpt.id;
391         job->timeout = 10000;
392 
393         if (args->timeout && args->timeout < 10000)
394                 job->timeout = args->timeout;
395 
396         err = host1x_job_pin(job, context->client->base.dev);
397         if (err)
398                 goto fail;
399 
400         err = host1x_job_submit(job);
401         if (err)
402                 goto fail_submit;
403 
404         args->fence = job->syncpt_end;
405 
406         host1x_job_put(job);
407         return 0;
408 
409 fail_submit:
410         host1x_job_unpin(job);
411 fail:
412         host1x_job_put(job);
413         return err;
414 }
415 
416 
417 #ifdef CONFIG_DRM_TEGRA_STAGING
418 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
419 {
420         return (struct tegra_drm_context *)(uintptr_t)context;
421 }
422 
423 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
424                                         struct tegra_drm_context *context)
425 {
426         struct tegra_drm_context *ctx;
427 
428         list_for_each_entry(ctx, &file->contexts, list)
429                 if (ctx == context)
430                         return true;
431 
432         return false;
433 }
434 
435 static int tegra_gem_create(struct drm_device *drm, void *data,
436                             struct drm_file *file)
437 {
438         struct drm_tegra_gem_create *args = data;
439         struct tegra_bo *bo;
440 
441         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
442                                          &args->handle);
443         if (IS_ERR(bo))
444                 return PTR_ERR(bo);
445 
446         return 0;
447 }
448 
449 static int tegra_gem_mmap(struct drm_device *drm, void *data,
450                           struct drm_file *file)
451 {
452         struct drm_tegra_gem_mmap *args = data;
453         struct drm_gem_object *gem;
454         struct tegra_bo *bo;
455 
456         gem = drm_gem_object_lookup(drm, file, args->handle);
457         if (!gem)
458                 return -EINVAL;
459 
460         bo = to_tegra_bo(gem);
461 
462         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
463 
464         drm_gem_object_unreference(gem);
465 
466         return 0;
467 }
468 
469 static int tegra_syncpt_read(struct drm_device *drm, void *data,
470                              struct drm_file *file)
471 {
472         struct host1x *host = dev_get_drvdata(drm->dev->parent);
473         struct drm_tegra_syncpt_read *args = data;
474         struct host1x_syncpt *sp;
475 
476         sp = host1x_syncpt_get(host, args->id);
477         if (!sp)
478                 return -EINVAL;
479 
480         args->value = host1x_syncpt_read_min(sp);
481         return 0;
482 }
483 
484 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
485                              struct drm_file *file)
486 {
487         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
488         struct drm_tegra_syncpt_incr *args = data;
489         struct host1x_syncpt *sp;
490 
491         sp = host1x_syncpt_get(host1x, args->id);
492         if (!sp)
493                 return -EINVAL;
494 
495         return host1x_syncpt_incr(sp);
496 }
497 
498 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
499                              struct drm_file *file)
500 {
501         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
502         struct drm_tegra_syncpt_wait *args = data;
503         struct host1x_syncpt *sp;
504 
505         sp = host1x_syncpt_get(host1x, args->id);
506         if (!sp)
507                 return -EINVAL;
508 
509         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
510                                   &args->value);
511 }
512 
513 static int tegra_open_channel(struct drm_device *drm, void *data,
514                               struct drm_file *file)
515 {
516         struct tegra_drm_file *fpriv = file->driver_priv;
517         struct tegra_drm *tegra = drm->dev_private;
518         struct drm_tegra_open_channel *args = data;
519         struct tegra_drm_context *context;
520         struct tegra_drm_client *client;
521         int err = -ENODEV;
522 
523         context = kzalloc(sizeof(*context), GFP_KERNEL);
524         if (!context)
525                 return -ENOMEM;
526 
527         list_for_each_entry(client, &tegra->clients, list)
528                 if (client->base.class == args->client) {
529                         err = client->ops->open_channel(client, context);
530                         if (err)
531                                 break;
532 
533                         list_add(&context->list, &fpriv->contexts);
534                         args->context = (uintptr_t)context;
535                         context->client = client;
536                         return 0;
537                 }
538 
539         kfree(context);
540         return err;
541 }
542 
543 static int tegra_close_channel(struct drm_device *drm, void *data,
544                                struct drm_file *file)
545 {
546         struct tegra_drm_file *fpriv = file->driver_priv;
547         struct drm_tegra_close_channel *args = data;
548         struct tegra_drm_context *context;
549 
550         context = tegra_drm_get_context(args->context);
551 
552         if (!tegra_drm_file_owns_context(fpriv, context))
553                 return -EINVAL;
554 
555         list_del(&context->list);
556         tegra_drm_context_free(context);
557 
558         return 0;
559 }
560 
561 static int tegra_get_syncpt(struct drm_device *drm, void *data,
562                             struct drm_file *file)
563 {
564         struct tegra_drm_file *fpriv = file->driver_priv;
565         struct drm_tegra_get_syncpt *args = data;
566         struct tegra_drm_context *context;
567         struct host1x_syncpt *syncpt;
568 
569         context = tegra_drm_get_context(args->context);
570 
571         if (!tegra_drm_file_owns_context(fpriv, context))
572                 return -ENODEV;
573 
574         if (args->index >= context->client->base.num_syncpts)
575                 return -EINVAL;
576 
577         syncpt = context->client->base.syncpts[args->index];
578         args->id = host1x_syncpt_id(syncpt);
579 
580         return 0;
581 }
582 
583 static int tegra_submit(struct drm_device *drm, void *data,
584                         struct drm_file *file)
585 {
586         struct tegra_drm_file *fpriv = file->driver_priv;
587         struct drm_tegra_submit *args = data;
588         struct tegra_drm_context *context;
589 
590         context = tegra_drm_get_context(args->context);
591 
592         if (!tegra_drm_file_owns_context(fpriv, context))
593                 return -ENODEV;
594 
595         return context->client->ops->submit(context, args, drm, file);
596 }
597 
598 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
599                                  struct drm_file *file)
600 {
601         struct tegra_drm_file *fpriv = file->driver_priv;
602         struct drm_tegra_get_syncpt_base *args = data;
603         struct tegra_drm_context *context;
604         struct host1x_syncpt_base *base;
605         struct host1x_syncpt *syncpt;
606 
607         context = tegra_drm_get_context(args->context);
608 
609         if (!tegra_drm_file_owns_context(fpriv, context))
610                 return -ENODEV;
611 
612         if (args->syncpt >= context->client->base.num_syncpts)
613                 return -EINVAL;
614 
615         syncpt = context->client->base.syncpts[args->syncpt];
616 
617         base = host1x_syncpt_get_base(syncpt);
618         if (!base)
619                 return -ENXIO;
620 
621         args->id = host1x_syncpt_base_id(base);
622 
623         return 0;
624 }
625 
626 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
627                                 struct drm_file *file)
628 {
629         struct drm_tegra_gem_set_tiling *args = data;
630         enum tegra_bo_tiling_mode mode;
631         struct drm_gem_object *gem;
632         unsigned long value = 0;
633         struct tegra_bo *bo;
634 
635         switch (args->mode) {
636         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
637                 mode = TEGRA_BO_TILING_MODE_PITCH;
638 
639                 if (args->value != 0)
640                         return -EINVAL;
641 
642                 break;
643 
644         case DRM_TEGRA_GEM_TILING_MODE_TILED:
645                 mode = TEGRA_BO_TILING_MODE_TILED;
646 
647                 if (args->value != 0)
648                         return -EINVAL;
649 
650                 break;
651 
652         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
653                 mode = TEGRA_BO_TILING_MODE_BLOCK;
654 
655                 if (args->value > 5)
656                         return -EINVAL;
657 
658                 value = args->value;
659                 break;
660 
661         default:
662                 return -EINVAL;
663         }
664 
665         gem = drm_gem_object_lookup(drm, file, args->handle);
666         if (!gem)
667                 return -ENOENT;
668 
669         bo = to_tegra_bo(gem);
670 
671         bo->tiling.mode = mode;
672         bo->tiling.value = value;
673 
674         drm_gem_object_unreference(gem);
675 
676         return 0;
677 }
678 
679 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
680                                 struct drm_file *file)
681 {
682         struct drm_tegra_gem_get_tiling *args = data;
683         struct drm_gem_object *gem;
684         struct tegra_bo *bo;
685         int err = 0;
686 
687         gem = drm_gem_object_lookup(drm, file, args->handle);
688         if (!gem)
689                 return -ENOENT;
690 
691         bo = to_tegra_bo(gem);
692 
693         switch (bo->tiling.mode) {
694         case TEGRA_BO_TILING_MODE_PITCH:
695                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
696                 args->value = 0;
697                 break;
698 
699         case TEGRA_BO_TILING_MODE_TILED:
700                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
701                 args->value = 0;
702                 break;
703 
704         case TEGRA_BO_TILING_MODE_BLOCK:
705                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
706                 args->value = bo->tiling.value;
707                 break;
708 
709         default:
710                 err = -EINVAL;
711                 break;
712         }
713 
714         drm_gem_object_unreference(gem);
715 
716         return err;
717 }
718 
719 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
720                                struct drm_file *file)
721 {
722         struct drm_tegra_gem_set_flags *args = data;
723         struct drm_gem_object *gem;
724         struct tegra_bo *bo;
725 
726         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
727                 return -EINVAL;
728 
729         gem = drm_gem_object_lookup(drm, file, args->handle);
730         if (!gem)
731                 return -ENOENT;
732 
733         bo = to_tegra_bo(gem);
734         bo->flags = 0;
735 
736         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
737                 bo->flags |= TEGRA_BO_BOTTOM_UP;
738 
739         drm_gem_object_unreference(gem);
740 
741         return 0;
742 }
743 
744 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
745                                struct drm_file *file)
746 {
747         struct drm_tegra_gem_get_flags *args = data;
748         struct drm_gem_object *gem;
749         struct tegra_bo *bo;
750 
751         gem = drm_gem_object_lookup(drm, file, args->handle);
752         if (!gem)
753                 return -ENOENT;
754 
755         bo = to_tegra_bo(gem);
756         args->flags = 0;
757 
758         if (bo->flags & TEGRA_BO_BOTTOM_UP)
759                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
760 
761         drm_gem_object_unreference(gem);
762 
763         return 0;
764 }
765 #endif
766 
767 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
768 #ifdef CONFIG_DRM_TEGRA_STAGING
769         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED),
770         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
771         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
772         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
773         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
774         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
775         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
776         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
777         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
778         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, DRM_UNLOCKED),
779         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, DRM_UNLOCKED),
780         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, DRM_UNLOCKED),
781         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, DRM_UNLOCKED),
782         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, DRM_UNLOCKED),
783 #endif
784 };
785 
786 static const struct file_operations tegra_drm_fops = {
787         .owner = THIS_MODULE,
788         .open = drm_open,
789         .release = drm_release,
790         .unlocked_ioctl = drm_ioctl,
791         .mmap = tegra_drm_mmap,
792         .poll = drm_poll,
793         .read = drm_read,
794 #ifdef CONFIG_COMPAT
795         .compat_ioctl = drm_compat_ioctl,
796 #endif
797         .llseek = noop_llseek,
798 };
799 
800 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
801                                              unsigned int pipe)
802 {
803         struct drm_crtc *crtc;
804 
805         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
806                 if (pipe == drm_crtc_index(crtc))
807                         return crtc;
808         }
809 
810         return NULL;
811 }
812 
813 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm, int pipe)
814 {
815         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
816 
817         if (!crtc)
818                 return 0;
819 
820         /* TODO: implement real hardware counter using syncpoints */
821         return drm_crtc_vblank_count(crtc);
822 }
823 
824 static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
825 {
826         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
827         struct tegra_dc *dc = to_tegra_dc(crtc);
828 
829         if (!crtc)
830                 return -ENODEV;
831 
832         tegra_dc_enable_vblank(dc);
833 
834         return 0;
835 }
836 
837 static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
838 {
839         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
840         struct tegra_dc *dc = to_tegra_dc(crtc);
841 
842         if (crtc)
843                 tegra_dc_disable_vblank(dc);
844 }
845 
846 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
847 {
848         struct tegra_drm_file *fpriv = file->driver_priv;
849         struct tegra_drm_context *context, *tmp;
850         struct drm_crtc *crtc;
851 
852         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
853                 tegra_dc_cancel_page_flip(crtc, file);
854 
855         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
856                 tegra_drm_context_free(context);
857 
858         kfree(fpriv);
859 }
860 
861 #ifdef CONFIG_DEBUG_FS
862 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
863 {
864         struct drm_info_node *node = (struct drm_info_node *)s->private;
865         struct drm_device *drm = node->minor->dev;
866         struct drm_framebuffer *fb;
867 
868         mutex_lock(&drm->mode_config.fb_lock);
869 
870         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
871                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
872                            fb->base.id, fb->width, fb->height, fb->depth,
873                            fb->bits_per_pixel,
874                            atomic_read(&fb->refcount.refcount));
875         }
876 
877         mutex_unlock(&drm->mode_config.fb_lock);
878 
879         return 0;
880 }
881 
882 static struct drm_info_list tegra_debugfs_list[] = {
883         { "framebuffers", tegra_debugfs_framebuffers, 0 },
884 };
885 
886 static int tegra_debugfs_init(struct drm_minor *minor)
887 {
888         return drm_debugfs_create_files(tegra_debugfs_list,
889                                         ARRAY_SIZE(tegra_debugfs_list),
890                                         minor->debugfs_root, minor);
891 }
892 
893 static void tegra_debugfs_cleanup(struct drm_minor *minor)
894 {
895         drm_debugfs_remove_files(tegra_debugfs_list,
896                                  ARRAY_SIZE(tegra_debugfs_list), minor);
897 }
898 #endif
899 
900 static struct drm_driver tegra_drm_driver = {
901         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
902         .load = tegra_drm_load,
903         .unload = tegra_drm_unload,
904         .open = tegra_drm_open,
905         .preclose = tegra_drm_preclose,
906         .lastclose = tegra_drm_lastclose,
907 
908         .get_vblank_counter = tegra_drm_get_vblank_counter,
909         .enable_vblank = tegra_drm_enable_vblank,
910         .disable_vblank = tegra_drm_disable_vblank,
911 
912 #if defined(CONFIG_DEBUG_FS)
913         .debugfs_init = tegra_debugfs_init,
914         .debugfs_cleanup = tegra_debugfs_cleanup,
915 #endif
916 
917         .gem_free_object = tegra_bo_free_object,
918         .gem_vm_ops = &tegra_bo_vm_ops,
919 
920         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
921         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
922         .gem_prime_export = tegra_gem_prime_export,
923         .gem_prime_import = tegra_gem_prime_import,
924 
925         .dumb_create = tegra_bo_dumb_create,
926         .dumb_map_offset = tegra_bo_dumb_map_offset,
927         .dumb_destroy = drm_gem_dumb_destroy,
928 
929         .ioctls = tegra_drm_ioctls,
930         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
931         .fops = &tegra_drm_fops,
932 
933         .name = DRIVER_NAME,
934         .desc = DRIVER_DESC,
935         .date = DRIVER_DATE,
936         .major = DRIVER_MAJOR,
937         .minor = DRIVER_MINOR,
938         .patchlevel = DRIVER_PATCHLEVEL,
939 };
940 
941 int tegra_drm_register_client(struct tegra_drm *tegra,
942                               struct tegra_drm_client *client)
943 {
944         mutex_lock(&tegra->clients_lock);
945         list_add_tail(&client->list, &tegra->clients);
946         mutex_unlock(&tegra->clients_lock);
947 
948         return 0;
949 }
950 
951 int tegra_drm_unregister_client(struct tegra_drm *tegra,
952                                 struct tegra_drm_client *client)
953 {
954         mutex_lock(&tegra->clients_lock);
955         list_del_init(&client->list);
956         mutex_unlock(&tegra->clients_lock);
957 
958         return 0;
959 }
960 
961 static int host1x_drm_probe(struct host1x_device *dev)
962 {
963         struct drm_driver *driver = &tegra_drm_driver;
964         struct drm_device *drm;
965         int err;
966 
967         drm = drm_dev_alloc(driver, &dev->dev);
968         if (!drm)
969                 return -ENOMEM;
970 
971         drm_dev_set_unique(drm, dev_name(&dev->dev));
972         dev_set_drvdata(&dev->dev, drm);
973 
974         err = drm_dev_register(drm, 0);
975         if (err < 0)
976                 goto unref;
977 
978         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
979                  driver->major, driver->minor, driver->patchlevel,
980                  driver->date, drm->primary->index);
981 
982         return 0;
983 
984 unref:
985         drm_dev_unref(drm);
986         return err;
987 }
988 
989 static int host1x_drm_remove(struct host1x_device *dev)
990 {
991         struct drm_device *drm = dev_get_drvdata(&dev->dev);
992 
993         drm_dev_unregister(drm);
994         drm_dev_unref(drm);
995 
996         return 0;
997 }
998 
999 #ifdef CONFIG_PM_SLEEP
1000 static int host1x_drm_suspend(struct device *dev)
1001 {
1002         struct drm_device *drm = dev_get_drvdata(dev);
1003 
1004         drm_kms_helper_poll_disable(drm);
1005 
1006         return 0;
1007 }
1008 
1009 static int host1x_drm_resume(struct device *dev)
1010 {
1011         struct drm_device *drm = dev_get_drvdata(dev);
1012 
1013         drm_kms_helper_poll_enable(drm);
1014 
1015         return 0;
1016 }
1017 #endif
1018 
1019 static const struct dev_pm_ops host1x_drm_pm_ops = {
1020         SET_SYSTEM_SLEEP_PM_OPS(host1x_drm_suspend, host1x_drm_resume)
1021 };
1022 
1023 static const struct of_device_id host1x_drm_subdevs[] = {
1024         { .compatible = "nvidia,tegra20-dc", },
1025         { .compatible = "nvidia,tegra20-hdmi", },
1026         { .compatible = "nvidia,tegra20-gr2d", },
1027         { .compatible = "nvidia,tegra20-gr3d", },
1028         { .compatible = "nvidia,tegra30-dc", },
1029         { .compatible = "nvidia,tegra30-hdmi", },
1030         { .compatible = "nvidia,tegra30-gr2d", },
1031         { .compatible = "nvidia,tegra30-gr3d", },
1032         { .compatible = "nvidia,tegra114-dsi", },
1033         { .compatible = "nvidia,tegra114-hdmi", },
1034         { .compatible = "nvidia,tegra114-gr3d", },
1035         { .compatible = "nvidia,tegra124-dc", },
1036         { .compatible = "nvidia,tegra124-sor", },
1037         { .compatible = "nvidia,tegra124-hdmi", },
1038         { /* sentinel */ }
1039 };
1040 
1041 static struct host1x_driver host1x_drm_driver = {
1042         .driver = {
1043                 .name = "drm",
1044                 .pm = &host1x_drm_pm_ops,
1045         },
1046         .probe = host1x_drm_probe,
1047         .remove = host1x_drm_remove,
1048         .subdevs = host1x_drm_subdevs,
1049 };
1050 
1051 static int __init host1x_drm_init(void)
1052 {
1053         int err;
1054 
1055         err = host1x_driver_register(&host1x_drm_driver);
1056         if (err < 0)
1057                 return err;
1058 
1059         err = platform_driver_register(&tegra_dc_driver);
1060         if (err < 0)
1061                 goto unregister_host1x;
1062 
1063         err = platform_driver_register(&tegra_dsi_driver);
1064         if (err < 0)
1065                 goto unregister_dc;
1066 
1067         err = platform_driver_register(&tegra_sor_driver);
1068         if (err < 0)
1069                 goto unregister_dsi;
1070 
1071         err = platform_driver_register(&tegra_hdmi_driver);
1072         if (err < 0)
1073                 goto unregister_sor;
1074 
1075         err = platform_driver_register(&tegra_dpaux_driver);
1076         if (err < 0)
1077                 goto unregister_hdmi;
1078 
1079         err = platform_driver_register(&tegra_gr2d_driver);
1080         if (err < 0)
1081                 goto unregister_dpaux;
1082 
1083         err = platform_driver_register(&tegra_gr3d_driver);
1084         if (err < 0)
1085                 goto unregister_gr2d;
1086 
1087         return 0;
1088 
1089 unregister_gr2d:
1090         platform_driver_unregister(&tegra_gr2d_driver);
1091 unregister_dpaux:
1092         platform_driver_unregister(&tegra_dpaux_driver);
1093 unregister_hdmi:
1094         platform_driver_unregister(&tegra_hdmi_driver);
1095 unregister_sor:
1096         platform_driver_unregister(&tegra_sor_driver);
1097 unregister_dsi:
1098         platform_driver_unregister(&tegra_dsi_driver);
1099 unregister_dc:
1100         platform_driver_unregister(&tegra_dc_driver);
1101 unregister_host1x:
1102         host1x_driver_unregister(&host1x_drm_driver);
1103         return err;
1104 }
1105 module_init(host1x_drm_init);
1106 
1107 static void __exit host1x_drm_exit(void)
1108 {
1109         platform_driver_unregister(&tegra_gr3d_driver);
1110         platform_driver_unregister(&tegra_gr2d_driver);
1111         platform_driver_unregister(&tegra_dpaux_driver);
1112         platform_driver_unregister(&tegra_hdmi_driver);
1113         platform_driver_unregister(&tegra_sor_driver);
1114         platform_driver_unregister(&tegra_dsi_driver);
1115         platform_driver_unregister(&tegra_dc_driver);
1116         host1x_driver_unregister(&host1x_drm_driver);
1117 }
1118 module_exit(host1x_drm_exit);
1119 
1120 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1121 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1122 MODULE_LICENSE("GPL v2");
1123 

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