Version:  2.0.40 2.2.26 2.4.37 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7

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_modeset_disables(drm, state);
 59         drm_atomic_helper_commit_planes(drm, state, false);
 60         drm_atomic_helper_commit_modeset_enables(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 nonblock)
 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 nonblocking 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 (nonblock)
 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_FBDEV_EMULATION
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                 struct iommu_domain_geometry *geometry;
128                 u64 start, end;
129 
130                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
131                 if (!tegra->domain) {
132                         err = -ENOMEM;
133                         goto free;
134                 }
135 
136                 geometry = &tegra->domain->geometry;
137                 start = geometry->aperture_start;
138                 end = geometry->aperture_end;
139 
140                 DRM_DEBUG_DRIVER("IOMMU aperture initialized (%#llx-%#llx)\n",
141                                  start, end);
142                 drm_mm_init(&tegra->mm, start, end - start + 1);
143         }
144 
145         mutex_init(&tegra->clients_lock);
146         INIT_LIST_HEAD(&tegra->clients);
147 
148         mutex_init(&tegra->commit.lock);
149         INIT_WORK(&tegra->commit.work, tegra_atomic_work);
150 
151         drm->dev_private = tegra;
152         tegra->drm = drm;
153 
154         drm_mode_config_init(drm);
155 
156         drm->mode_config.min_width = 0;
157         drm->mode_config.min_height = 0;
158 
159         drm->mode_config.max_width = 4096;
160         drm->mode_config.max_height = 4096;
161 
162         drm->mode_config.funcs = &tegra_drm_mode_funcs;
163 
164         err = tegra_drm_fb_prepare(drm);
165         if (err < 0)
166                 goto config;
167 
168         drm_kms_helper_poll_init(drm);
169 
170         err = host1x_device_init(device);
171         if (err < 0)
172                 goto fbdev;
173 
174         /*
175          * We don't use the drm_irq_install() helpers provided by the DRM
176          * core, so we need to set this manually in order to allow the
177          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
178          */
179         drm->irq_enabled = true;
180 
181         /* syncpoints are used for full 32-bit hardware VBLANK counters */
182         drm->max_vblank_count = 0xffffffff;
183 
184         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
185         if (err < 0)
186                 goto device;
187 
188         drm_mode_config_reset(drm);
189 
190         err = tegra_drm_fb_init(drm);
191         if (err < 0)
192                 goto vblank;
193 
194         return 0;
195 
196 vblank:
197         drm_vblank_cleanup(drm);
198 device:
199         host1x_device_exit(device);
200 fbdev:
201         drm_kms_helper_poll_fini(drm);
202         tegra_drm_fb_free(drm);
203 config:
204         drm_mode_config_cleanup(drm);
205 
206         if (tegra->domain) {
207                 iommu_domain_free(tegra->domain);
208                 drm_mm_takedown(&tegra->mm);
209         }
210 free:
211         kfree(tegra);
212         return err;
213 }
214 
215 static int tegra_drm_unload(struct drm_device *drm)
216 {
217         struct host1x_device *device = to_host1x_device(drm->dev);
218         struct tegra_drm *tegra = drm->dev_private;
219         int err;
220 
221         drm_kms_helper_poll_fini(drm);
222         tegra_drm_fb_exit(drm);
223         drm_mode_config_cleanup(drm);
224         drm_vblank_cleanup(drm);
225 
226         err = host1x_device_exit(device);
227         if (err < 0)
228                 return err;
229 
230         if (tegra->domain) {
231                 iommu_domain_free(tegra->domain);
232                 drm_mm_takedown(&tegra->mm);
233         }
234 
235         kfree(tegra);
236 
237         return 0;
238 }
239 
240 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
241 {
242         struct tegra_drm_file *fpriv;
243 
244         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
245         if (!fpriv)
246                 return -ENOMEM;
247 
248         INIT_LIST_HEAD(&fpriv->contexts);
249         filp->driver_priv = fpriv;
250 
251         return 0;
252 }
253 
254 static void tegra_drm_context_free(struct tegra_drm_context *context)
255 {
256         context->client->ops->close_channel(context);
257         kfree(context);
258 }
259 
260 static void tegra_drm_lastclose(struct drm_device *drm)
261 {
262 #ifdef CONFIG_DRM_FBDEV_EMULATION
263         struct tegra_drm *tegra = drm->dev_private;
264 
265         tegra_fbdev_restore_mode(tegra->fbdev);
266 #endif
267 }
268 
269 static struct host1x_bo *
270 host1x_bo_lookup(struct drm_file *file, u32 handle)
271 {
272         struct drm_gem_object *gem;
273         struct tegra_bo *bo;
274 
275         gem = drm_gem_object_lookup(file, handle);
276         if (!gem)
277                 return NULL;
278 
279         drm_gem_object_unreference_unlocked(gem);
280 
281         bo = to_tegra_bo(gem);
282         return &bo->base;
283 }
284 
285 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
286                                        struct drm_tegra_reloc __user *src,
287                                        struct drm_device *drm,
288                                        struct drm_file *file)
289 {
290         u32 cmdbuf, target;
291         int err;
292 
293         err = get_user(cmdbuf, &src->cmdbuf.handle);
294         if (err < 0)
295                 return err;
296 
297         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
298         if (err < 0)
299                 return err;
300 
301         err = get_user(target, &src->target.handle);
302         if (err < 0)
303                 return err;
304 
305         err = get_user(dest->target.offset, &src->target.offset);
306         if (err < 0)
307                 return err;
308 
309         err = get_user(dest->shift, &src->shift);
310         if (err < 0)
311                 return err;
312 
313         dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf);
314         if (!dest->cmdbuf.bo)
315                 return -ENOENT;
316 
317         dest->target.bo = host1x_bo_lookup(file, target);
318         if (!dest->target.bo)
319                 return -ENOENT;
320 
321         return 0;
322 }
323 
324 int tegra_drm_submit(struct tegra_drm_context *context,
325                      struct drm_tegra_submit *args, struct drm_device *drm,
326                      struct drm_file *file)
327 {
328         unsigned int num_cmdbufs = args->num_cmdbufs;
329         unsigned int num_relocs = args->num_relocs;
330         unsigned int num_waitchks = args->num_waitchks;
331         struct drm_tegra_cmdbuf __user *cmdbufs =
332                 (void __user *)(uintptr_t)args->cmdbufs;
333         struct drm_tegra_reloc __user *relocs =
334                 (void __user *)(uintptr_t)args->relocs;
335         struct drm_tegra_waitchk __user *waitchks =
336                 (void __user *)(uintptr_t)args->waitchks;
337         struct drm_tegra_syncpt syncpt;
338         struct host1x_job *job;
339         int err;
340 
341         /* We don't yet support other than one syncpt_incr struct per submit */
342         if (args->num_syncpts != 1)
343                 return -EINVAL;
344 
345         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
346                                args->num_relocs, args->num_waitchks);
347         if (!job)
348                 return -ENOMEM;
349 
350         job->num_relocs = args->num_relocs;
351         job->num_waitchk = args->num_waitchks;
352         job->client = (u32)args->context;
353         job->class = context->client->base.class;
354         job->serialize = true;
355 
356         while (num_cmdbufs) {
357                 struct drm_tegra_cmdbuf cmdbuf;
358                 struct host1x_bo *bo;
359 
360                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
361                         err = -EFAULT;
362                         goto fail;
363                 }
364 
365                 bo = host1x_bo_lookup(file, cmdbuf.handle);
366                 if (!bo) {
367                         err = -ENOENT;
368                         goto fail;
369                 }
370 
371                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
372                 num_cmdbufs--;
373                 cmdbufs++;
374         }
375 
376         /* copy and resolve relocations from submit */
377         while (num_relocs--) {
378                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
379                                                   &relocs[num_relocs], drm,
380                                                   file);
381                 if (err < 0)
382                         goto fail;
383         }
384 
385         if (copy_from_user(job->waitchk, waitchks,
386                            sizeof(*waitchks) * num_waitchks)) {
387                 err = -EFAULT;
388                 goto fail;
389         }
390 
391         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
392                            sizeof(syncpt))) {
393                 err = -EFAULT;
394                 goto fail;
395         }
396 
397         job->is_addr_reg = context->client->ops->is_addr_reg;
398         job->syncpt_incrs = syncpt.incrs;
399         job->syncpt_id = syncpt.id;
400         job->timeout = 10000;
401 
402         if (args->timeout && args->timeout < 10000)
403                 job->timeout = args->timeout;
404 
405         err = host1x_job_pin(job, context->client->base.dev);
406         if (err)
407                 goto fail;
408 
409         err = host1x_job_submit(job);
410         if (err)
411                 goto fail_submit;
412 
413         args->fence = job->syncpt_end;
414 
415         host1x_job_put(job);
416         return 0;
417 
418 fail_submit:
419         host1x_job_unpin(job);
420 fail:
421         host1x_job_put(job);
422         return err;
423 }
424 
425 
426 #ifdef CONFIG_DRM_TEGRA_STAGING
427 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
428 {
429         return (struct tegra_drm_context *)(uintptr_t)context;
430 }
431 
432 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
433                                         struct tegra_drm_context *context)
434 {
435         struct tegra_drm_context *ctx;
436 
437         list_for_each_entry(ctx, &file->contexts, list)
438                 if (ctx == context)
439                         return true;
440 
441         return false;
442 }
443 
444 static int tegra_gem_create(struct drm_device *drm, void *data,
445                             struct drm_file *file)
446 {
447         struct drm_tegra_gem_create *args = data;
448         struct tegra_bo *bo;
449 
450         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
451                                          &args->handle);
452         if (IS_ERR(bo))
453                 return PTR_ERR(bo);
454 
455         return 0;
456 }
457 
458 static int tegra_gem_mmap(struct drm_device *drm, void *data,
459                           struct drm_file *file)
460 {
461         struct drm_tegra_gem_mmap *args = data;
462         struct drm_gem_object *gem;
463         struct tegra_bo *bo;
464 
465         gem = drm_gem_object_lookup(file, args->handle);
466         if (!gem)
467                 return -EINVAL;
468 
469         bo = to_tegra_bo(gem);
470 
471         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
472 
473         drm_gem_object_unreference_unlocked(gem);
474 
475         return 0;
476 }
477 
478 static int tegra_syncpt_read(struct drm_device *drm, void *data,
479                              struct drm_file *file)
480 {
481         struct host1x *host = dev_get_drvdata(drm->dev->parent);
482         struct drm_tegra_syncpt_read *args = data;
483         struct host1x_syncpt *sp;
484 
485         sp = host1x_syncpt_get(host, args->id);
486         if (!sp)
487                 return -EINVAL;
488 
489         args->value = host1x_syncpt_read_min(sp);
490         return 0;
491 }
492 
493 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
494                              struct drm_file *file)
495 {
496         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
497         struct drm_tegra_syncpt_incr *args = data;
498         struct host1x_syncpt *sp;
499 
500         sp = host1x_syncpt_get(host1x, args->id);
501         if (!sp)
502                 return -EINVAL;
503 
504         return host1x_syncpt_incr(sp);
505 }
506 
507 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
508                              struct drm_file *file)
509 {
510         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
511         struct drm_tegra_syncpt_wait *args = data;
512         struct host1x_syncpt *sp;
513 
514         sp = host1x_syncpt_get(host1x, args->id);
515         if (!sp)
516                 return -EINVAL;
517 
518         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
519                                   &args->value);
520 }
521 
522 static int tegra_open_channel(struct drm_device *drm, void *data,
523                               struct drm_file *file)
524 {
525         struct tegra_drm_file *fpriv = file->driver_priv;
526         struct tegra_drm *tegra = drm->dev_private;
527         struct drm_tegra_open_channel *args = data;
528         struct tegra_drm_context *context;
529         struct tegra_drm_client *client;
530         int err = -ENODEV;
531 
532         context = kzalloc(sizeof(*context), GFP_KERNEL);
533         if (!context)
534                 return -ENOMEM;
535 
536         list_for_each_entry(client, &tegra->clients, list)
537                 if (client->base.class == args->client) {
538                         err = client->ops->open_channel(client, context);
539                         if (err)
540                                 break;
541 
542                         list_add(&context->list, &fpriv->contexts);
543                         args->context = (uintptr_t)context;
544                         context->client = client;
545                         return 0;
546                 }
547 
548         kfree(context);
549         return err;
550 }
551 
552 static int tegra_close_channel(struct drm_device *drm, void *data,
553                                struct drm_file *file)
554 {
555         struct tegra_drm_file *fpriv = file->driver_priv;
556         struct drm_tegra_close_channel *args = data;
557         struct tegra_drm_context *context;
558 
559         context = tegra_drm_get_context(args->context);
560 
561         if (!tegra_drm_file_owns_context(fpriv, context))
562                 return -EINVAL;
563 
564         list_del(&context->list);
565         tegra_drm_context_free(context);
566 
567         return 0;
568 }
569 
570 static int tegra_get_syncpt(struct drm_device *drm, void *data,
571                             struct drm_file *file)
572 {
573         struct tegra_drm_file *fpriv = file->driver_priv;
574         struct drm_tegra_get_syncpt *args = data;
575         struct tegra_drm_context *context;
576         struct host1x_syncpt *syncpt;
577 
578         context = tegra_drm_get_context(args->context);
579 
580         if (!tegra_drm_file_owns_context(fpriv, context))
581                 return -ENODEV;
582 
583         if (args->index >= context->client->base.num_syncpts)
584                 return -EINVAL;
585 
586         syncpt = context->client->base.syncpts[args->index];
587         args->id = host1x_syncpt_id(syncpt);
588 
589         return 0;
590 }
591 
592 static int tegra_submit(struct drm_device *drm, void *data,
593                         struct drm_file *file)
594 {
595         struct tegra_drm_file *fpriv = file->driver_priv;
596         struct drm_tegra_submit *args = data;
597         struct tegra_drm_context *context;
598 
599         context = tegra_drm_get_context(args->context);
600 
601         if (!tegra_drm_file_owns_context(fpriv, context))
602                 return -ENODEV;
603 
604         return context->client->ops->submit(context, args, drm, file);
605 }
606 
607 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
608                                  struct drm_file *file)
609 {
610         struct tegra_drm_file *fpriv = file->driver_priv;
611         struct drm_tegra_get_syncpt_base *args = data;
612         struct tegra_drm_context *context;
613         struct host1x_syncpt_base *base;
614         struct host1x_syncpt *syncpt;
615 
616         context = tegra_drm_get_context(args->context);
617 
618         if (!tegra_drm_file_owns_context(fpriv, context))
619                 return -ENODEV;
620 
621         if (args->syncpt >= context->client->base.num_syncpts)
622                 return -EINVAL;
623 
624         syncpt = context->client->base.syncpts[args->syncpt];
625 
626         base = host1x_syncpt_get_base(syncpt);
627         if (!base)
628                 return -ENXIO;
629 
630         args->id = host1x_syncpt_base_id(base);
631 
632         return 0;
633 }
634 
635 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
636                                 struct drm_file *file)
637 {
638         struct drm_tegra_gem_set_tiling *args = data;
639         enum tegra_bo_tiling_mode mode;
640         struct drm_gem_object *gem;
641         unsigned long value = 0;
642         struct tegra_bo *bo;
643 
644         switch (args->mode) {
645         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
646                 mode = TEGRA_BO_TILING_MODE_PITCH;
647 
648                 if (args->value != 0)
649                         return -EINVAL;
650 
651                 break;
652 
653         case DRM_TEGRA_GEM_TILING_MODE_TILED:
654                 mode = TEGRA_BO_TILING_MODE_TILED;
655 
656                 if (args->value != 0)
657                         return -EINVAL;
658 
659                 break;
660 
661         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
662                 mode = TEGRA_BO_TILING_MODE_BLOCK;
663 
664                 if (args->value > 5)
665                         return -EINVAL;
666 
667                 value = args->value;
668                 break;
669 
670         default:
671                 return -EINVAL;
672         }
673 
674         gem = drm_gem_object_lookup(file, args->handle);
675         if (!gem)
676                 return -ENOENT;
677 
678         bo = to_tegra_bo(gem);
679 
680         bo->tiling.mode = mode;
681         bo->tiling.value = value;
682 
683         drm_gem_object_unreference_unlocked(gem);
684 
685         return 0;
686 }
687 
688 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
689                                 struct drm_file *file)
690 {
691         struct drm_tegra_gem_get_tiling *args = data;
692         struct drm_gem_object *gem;
693         struct tegra_bo *bo;
694         int err = 0;
695 
696         gem = drm_gem_object_lookup(file, args->handle);
697         if (!gem)
698                 return -ENOENT;
699 
700         bo = to_tegra_bo(gem);
701 
702         switch (bo->tiling.mode) {
703         case TEGRA_BO_TILING_MODE_PITCH:
704                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
705                 args->value = 0;
706                 break;
707 
708         case TEGRA_BO_TILING_MODE_TILED:
709                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
710                 args->value = 0;
711                 break;
712 
713         case TEGRA_BO_TILING_MODE_BLOCK:
714                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
715                 args->value = bo->tiling.value;
716                 break;
717 
718         default:
719                 err = -EINVAL;
720                 break;
721         }
722 
723         drm_gem_object_unreference_unlocked(gem);
724 
725         return err;
726 }
727 
728 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
729                                struct drm_file *file)
730 {
731         struct drm_tegra_gem_set_flags *args = data;
732         struct drm_gem_object *gem;
733         struct tegra_bo *bo;
734 
735         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
736                 return -EINVAL;
737 
738         gem = drm_gem_object_lookup(file, args->handle);
739         if (!gem)
740                 return -ENOENT;
741 
742         bo = to_tegra_bo(gem);
743         bo->flags = 0;
744 
745         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
746                 bo->flags |= TEGRA_BO_BOTTOM_UP;
747 
748         drm_gem_object_unreference_unlocked(gem);
749 
750         return 0;
751 }
752 
753 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
754                                struct drm_file *file)
755 {
756         struct drm_tegra_gem_get_flags *args = data;
757         struct drm_gem_object *gem;
758         struct tegra_bo *bo;
759 
760         gem = drm_gem_object_lookup(file, args->handle);
761         if (!gem)
762                 return -ENOENT;
763 
764         bo = to_tegra_bo(gem);
765         args->flags = 0;
766 
767         if (bo->flags & TEGRA_BO_BOTTOM_UP)
768                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
769 
770         drm_gem_object_unreference_unlocked(gem);
771 
772         return 0;
773 }
774 #endif
775 
776 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
777 #ifdef CONFIG_DRM_TEGRA_STAGING
778         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, 0),
779         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, 0),
780         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, 0),
781         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, 0),
782         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, 0),
783         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, 0),
784         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, 0),
785         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, 0),
786         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, 0),
787         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, 0),
788         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, 0),
789         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, 0),
790         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, 0),
791         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, 0),
792 #endif
793 };
794 
795 static const struct file_operations tegra_drm_fops = {
796         .owner = THIS_MODULE,
797         .open = drm_open,
798         .release = drm_release,
799         .unlocked_ioctl = drm_ioctl,
800         .mmap = tegra_drm_mmap,
801         .poll = drm_poll,
802         .read = drm_read,
803 #ifdef CONFIG_COMPAT
804         .compat_ioctl = drm_compat_ioctl,
805 #endif
806         .llseek = noop_llseek,
807 };
808 
809 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
810                                              unsigned int pipe)
811 {
812         struct drm_crtc *crtc;
813 
814         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
815                 if (pipe == drm_crtc_index(crtc))
816                         return crtc;
817         }
818 
819         return NULL;
820 }
821 
822 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm,
823                                         unsigned int pipe)
824 {
825         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
826         struct tegra_dc *dc = to_tegra_dc(crtc);
827 
828         if (!crtc)
829                 return 0;
830 
831         return tegra_dc_get_vblank_counter(dc);
832 }
833 
834 static int tegra_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
835 {
836         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
837         struct tegra_dc *dc = to_tegra_dc(crtc);
838 
839         if (!crtc)
840                 return -ENODEV;
841 
842         tegra_dc_enable_vblank(dc);
843 
844         return 0;
845 }
846 
847 static void tegra_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
848 {
849         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
850         struct tegra_dc *dc = to_tegra_dc(crtc);
851 
852         if (crtc)
853                 tegra_dc_disable_vblank(dc);
854 }
855 
856 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
857 {
858         struct tegra_drm_file *fpriv = file->driver_priv;
859         struct tegra_drm_context *context, *tmp;
860 
861         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
862                 tegra_drm_context_free(context);
863 
864         kfree(fpriv);
865 }
866 
867 #ifdef CONFIG_DEBUG_FS
868 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
869 {
870         struct drm_info_node *node = (struct drm_info_node *)s->private;
871         struct drm_device *drm = node->minor->dev;
872         struct drm_framebuffer *fb;
873 
874         mutex_lock(&drm->mode_config.fb_lock);
875 
876         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
877                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
878                            fb->base.id, fb->width, fb->height, fb->depth,
879                            fb->bits_per_pixel,
880                            drm_framebuffer_read_refcount(fb));
881         }
882 
883         mutex_unlock(&drm->mode_config.fb_lock);
884 
885         return 0;
886 }
887 
888 static int tegra_debugfs_iova(struct seq_file *s, void *data)
889 {
890         struct drm_info_node *node = (struct drm_info_node *)s->private;
891         struct drm_device *drm = node->minor->dev;
892         struct tegra_drm *tegra = drm->dev_private;
893 
894         return drm_mm_dump_table(s, &tegra->mm);
895 }
896 
897 static struct drm_info_list tegra_debugfs_list[] = {
898         { "framebuffers", tegra_debugfs_framebuffers, 0 },
899         { "iova", tegra_debugfs_iova, 0 },
900 };
901 
902 static int tegra_debugfs_init(struct drm_minor *minor)
903 {
904         return drm_debugfs_create_files(tegra_debugfs_list,
905                                         ARRAY_SIZE(tegra_debugfs_list),
906                                         minor->debugfs_root, minor);
907 }
908 
909 static void tegra_debugfs_cleanup(struct drm_minor *minor)
910 {
911         drm_debugfs_remove_files(tegra_debugfs_list,
912                                  ARRAY_SIZE(tegra_debugfs_list), minor);
913 }
914 #endif
915 
916 static struct drm_driver tegra_drm_driver = {
917         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
918                            DRIVER_ATOMIC,
919         .load = tegra_drm_load,
920         .unload = tegra_drm_unload,
921         .open = tegra_drm_open,
922         .preclose = tegra_drm_preclose,
923         .lastclose = tegra_drm_lastclose,
924 
925         .get_vblank_counter = tegra_drm_get_vblank_counter,
926         .enable_vblank = tegra_drm_enable_vblank,
927         .disable_vblank = tegra_drm_disable_vblank,
928 
929 #if defined(CONFIG_DEBUG_FS)
930         .debugfs_init = tegra_debugfs_init,
931         .debugfs_cleanup = tegra_debugfs_cleanup,
932 #endif
933 
934         .gem_free_object_unlocked = tegra_bo_free_object,
935         .gem_vm_ops = &tegra_bo_vm_ops,
936 
937         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
938         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
939         .gem_prime_export = tegra_gem_prime_export,
940         .gem_prime_import = tegra_gem_prime_import,
941 
942         .dumb_create = tegra_bo_dumb_create,
943         .dumb_map_offset = tegra_bo_dumb_map_offset,
944         .dumb_destroy = drm_gem_dumb_destroy,
945 
946         .ioctls = tegra_drm_ioctls,
947         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
948         .fops = &tegra_drm_fops,
949 
950         .name = DRIVER_NAME,
951         .desc = DRIVER_DESC,
952         .date = DRIVER_DATE,
953         .major = DRIVER_MAJOR,
954         .minor = DRIVER_MINOR,
955         .patchlevel = DRIVER_PATCHLEVEL,
956 };
957 
958 int tegra_drm_register_client(struct tegra_drm *tegra,
959                               struct tegra_drm_client *client)
960 {
961         mutex_lock(&tegra->clients_lock);
962         list_add_tail(&client->list, &tegra->clients);
963         mutex_unlock(&tegra->clients_lock);
964 
965         return 0;
966 }
967 
968 int tegra_drm_unregister_client(struct tegra_drm *tegra,
969                                 struct tegra_drm_client *client)
970 {
971         mutex_lock(&tegra->clients_lock);
972         list_del_init(&client->list);
973         mutex_unlock(&tegra->clients_lock);
974 
975         return 0;
976 }
977 
978 static int host1x_drm_probe(struct host1x_device *dev)
979 {
980         struct drm_driver *driver = &tegra_drm_driver;
981         struct drm_device *drm;
982         int err;
983 
984         drm = drm_dev_alloc(driver, &dev->dev);
985         if (!drm)
986                 return -ENOMEM;
987 
988         dev_set_drvdata(&dev->dev, drm);
989 
990         err = drm_dev_register(drm, 0);
991         if (err < 0)
992                 goto unref;
993 
994         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
995                  driver->major, driver->minor, driver->patchlevel,
996                  driver->date, drm->primary->index);
997 
998         return 0;
999 
1000 unref:
1001         drm_dev_unref(drm);
1002         return err;
1003 }
1004 
1005 static int host1x_drm_remove(struct host1x_device *dev)
1006 {
1007         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1008 
1009         drm_dev_unregister(drm);
1010         drm_dev_unref(drm);
1011 
1012         return 0;
1013 }
1014 
1015 #ifdef CONFIG_PM_SLEEP
1016 static int host1x_drm_suspend(struct device *dev)
1017 {
1018         struct drm_device *drm = dev_get_drvdata(dev);
1019         struct tegra_drm *tegra = drm->dev_private;
1020 
1021         drm_kms_helper_poll_disable(drm);
1022         tegra_drm_fb_suspend(drm);
1023 
1024         tegra->state = drm_atomic_helper_suspend(drm);
1025         if (IS_ERR(tegra->state)) {
1026                 tegra_drm_fb_resume(drm);
1027                 drm_kms_helper_poll_enable(drm);
1028                 return PTR_ERR(tegra->state);
1029         }
1030 
1031         return 0;
1032 }
1033 
1034 static int host1x_drm_resume(struct device *dev)
1035 {
1036         struct drm_device *drm = dev_get_drvdata(dev);
1037         struct tegra_drm *tegra = drm->dev_private;
1038 
1039         drm_atomic_helper_resume(drm, tegra->state);
1040         tegra_drm_fb_resume(drm);
1041         drm_kms_helper_poll_enable(drm);
1042 
1043         return 0;
1044 }
1045 #endif
1046 
1047 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1048                          host1x_drm_resume);
1049 
1050 static const struct of_device_id host1x_drm_subdevs[] = {
1051         { .compatible = "nvidia,tegra20-dc", },
1052         { .compatible = "nvidia,tegra20-hdmi", },
1053         { .compatible = "nvidia,tegra20-gr2d", },
1054         { .compatible = "nvidia,tegra20-gr3d", },
1055         { .compatible = "nvidia,tegra30-dc", },
1056         { .compatible = "nvidia,tegra30-hdmi", },
1057         { .compatible = "nvidia,tegra30-gr2d", },
1058         { .compatible = "nvidia,tegra30-gr3d", },
1059         { .compatible = "nvidia,tegra114-dsi", },
1060         { .compatible = "nvidia,tegra114-hdmi", },
1061         { .compatible = "nvidia,tegra114-gr3d", },
1062         { .compatible = "nvidia,tegra124-dc", },
1063         { .compatible = "nvidia,tegra124-sor", },
1064         { .compatible = "nvidia,tegra124-hdmi", },
1065         { .compatible = "nvidia,tegra124-dsi", },
1066         { .compatible = "nvidia,tegra132-dsi", },
1067         { .compatible = "nvidia,tegra210-dc", },
1068         { .compatible = "nvidia,tegra210-dsi", },
1069         { .compatible = "nvidia,tegra210-sor", },
1070         { .compatible = "nvidia,tegra210-sor1", },
1071         { /* sentinel */ }
1072 };
1073 
1074 static struct host1x_driver host1x_drm_driver = {
1075         .driver = {
1076                 .name = "drm",
1077                 .pm = &host1x_drm_pm_ops,
1078         },
1079         .probe = host1x_drm_probe,
1080         .remove = host1x_drm_remove,
1081         .subdevs = host1x_drm_subdevs,
1082 };
1083 
1084 static struct platform_driver * const drivers[] = {
1085         &tegra_dc_driver,
1086         &tegra_hdmi_driver,
1087         &tegra_dsi_driver,
1088         &tegra_dpaux_driver,
1089         &tegra_sor_driver,
1090         &tegra_gr2d_driver,
1091         &tegra_gr3d_driver,
1092 };
1093 
1094 static int __init host1x_drm_init(void)
1095 {
1096         int err;
1097 
1098         err = host1x_driver_register(&host1x_drm_driver);
1099         if (err < 0)
1100                 return err;
1101 
1102         err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1103         if (err < 0)
1104                 goto unregister_host1x;
1105 
1106         return 0;
1107 
1108 unregister_host1x:
1109         host1x_driver_unregister(&host1x_drm_driver);
1110         return err;
1111 }
1112 module_init(host1x_drm_init);
1113 
1114 static void __exit host1x_drm_exit(void)
1115 {
1116         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1117         host1x_driver_unregister(&host1x_drm_driver);
1118 }
1119 module_exit(host1x_drm_exit);
1120 
1121 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1122 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1123 MODULE_LICENSE("GPL v2");
1124 

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