Version:  2.0.40 2.2.26 2.4.37 3.9 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

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 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_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         drm->vblank_disable_allowed = true;
184 
185         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
186         if (err < 0)
187                 goto device;
188 
189         drm_mode_config_reset(drm);
190 
191         err = tegra_drm_fb_init(drm);
192         if (err < 0)
193                 goto vblank;
194 
195         return 0;
196 
197 vblank:
198         drm_vblank_cleanup(drm);
199 device:
200         host1x_device_exit(device);
201 fbdev:
202         drm_kms_helper_poll_fini(drm);
203         tegra_drm_fb_free(drm);
204 config:
205         drm_mode_config_cleanup(drm);
206 
207         if (tegra->domain) {
208                 iommu_domain_free(tegra->domain);
209                 drm_mm_takedown(&tegra->mm);
210         }
211 free:
212         kfree(tegra);
213         return err;
214 }
215 
216 static int tegra_drm_unload(struct drm_device *drm)
217 {
218         struct host1x_device *device = to_host1x_device(drm->dev);
219         struct tegra_drm *tegra = drm->dev_private;
220         int err;
221 
222         drm_kms_helper_poll_fini(drm);
223         tegra_drm_fb_exit(drm);
224         drm_mode_config_cleanup(drm);
225         drm_vblank_cleanup(drm);
226 
227         err = host1x_device_exit(device);
228         if (err < 0)
229                 return err;
230 
231         if (tegra->domain) {
232                 iommu_domain_free(tegra->domain);
233                 drm_mm_takedown(&tegra->mm);
234         }
235 
236         kfree(tegra);
237 
238         return 0;
239 }
240 
241 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
242 {
243         struct tegra_drm_file *fpriv;
244 
245         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
246         if (!fpriv)
247                 return -ENOMEM;
248 
249         INIT_LIST_HEAD(&fpriv->contexts);
250         filp->driver_priv = fpriv;
251 
252         return 0;
253 }
254 
255 static void tegra_drm_context_free(struct tegra_drm_context *context)
256 {
257         context->client->ops->close_channel(context);
258         kfree(context);
259 }
260 
261 static void tegra_drm_lastclose(struct drm_device *drm)
262 {
263 #ifdef CONFIG_DRM_FBDEV_EMULATION
264         struct tegra_drm *tegra = drm->dev_private;
265 
266         tegra_fbdev_restore_mode(tegra->fbdev);
267 #endif
268 }
269 
270 static struct host1x_bo *
271 host1x_bo_lookup(struct drm_device *drm, struct drm_file *file, u32 handle)
272 {
273         struct drm_gem_object *gem;
274         struct tegra_bo *bo;
275 
276         gem = drm_gem_object_lookup(drm, file, handle);
277         if (!gem)
278                 return NULL;
279 
280         drm_gem_object_unreference_unlocked(gem);
281 
282         bo = to_tegra_bo(gem);
283         return &bo->base;
284 }
285 
286 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
287                                        struct drm_tegra_reloc __user *src,
288                                        struct drm_device *drm,
289                                        struct drm_file *file)
290 {
291         u32 cmdbuf, target;
292         int err;
293 
294         err = get_user(cmdbuf, &src->cmdbuf.handle);
295         if (err < 0)
296                 return err;
297 
298         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
299         if (err < 0)
300                 return err;
301 
302         err = get_user(target, &src->target.handle);
303         if (err < 0)
304                 return err;
305 
306         err = get_user(dest->target.offset, &src->target.offset);
307         if (err < 0)
308                 return err;
309 
310         err = get_user(dest->shift, &src->shift);
311         if (err < 0)
312                 return err;
313 
314         dest->cmdbuf.bo = host1x_bo_lookup(drm, file, cmdbuf);
315         if (!dest->cmdbuf.bo)
316                 return -ENOENT;
317 
318         dest->target.bo = host1x_bo_lookup(drm, file, target);
319         if (!dest->target.bo)
320                 return -ENOENT;
321 
322         return 0;
323 }
324 
325 int tegra_drm_submit(struct tegra_drm_context *context,
326                      struct drm_tegra_submit *args, struct drm_device *drm,
327                      struct drm_file *file)
328 {
329         unsigned int num_cmdbufs = args->num_cmdbufs;
330         unsigned int num_relocs = args->num_relocs;
331         unsigned int num_waitchks = args->num_waitchks;
332         struct drm_tegra_cmdbuf __user *cmdbufs =
333                 (void __user *)(uintptr_t)args->cmdbufs;
334         struct drm_tegra_reloc __user *relocs =
335                 (void __user *)(uintptr_t)args->relocs;
336         struct drm_tegra_waitchk __user *waitchks =
337                 (void __user *)(uintptr_t)args->waitchks;
338         struct drm_tegra_syncpt syncpt;
339         struct host1x_job *job;
340         int err;
341 
342         /* We don't yet support other than one syncpt_incr struct per submit */
343         if (args->num_syncpts != 1)
344                 return -EINVAL;
345 
346         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
347                                args->num_relocs, args->num_waitchks);
348         if (!job)
349                 return -ENOMEM;
350 
351         job->num_relocs = args->num_relocs;
352         job->num_waitchk = args->num_waitchks;
353         job->client = (u32)args->context;
354         job->class = context->client->base.class;
355         job->serialize = true;
356 
357         while (num_cmdbufs) {
358                 struct drm_tegra_cmdbuf cmdbuf;
359                 struct host1x_bo *bo;
360 
361                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
362                         err = -EFAULT;
363                         goto fail;
364                 }
365 
366                 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
367                 if (!bo) {
368                         err = -ENOENT;
369                         goto fail;
370                 }
371 
372                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
373                 num_cmdbufs--;
374                 cmdbufs++;
375         }
376 
377         /* copy and resolve relocations from submit */
378         while (num_relocs--) {
379                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
380                                                   &relocs[num_relocs], drm,
381                                                   file);
382                 if (err < 0)
383                         goto fail;
384         }
385 
386         if (copy_from_user(job->waitchk, waitchks,
387                            sizeof(*waitchks) * num_waitchks)) {
388                 err = -EFAULT;
389                 goto fail;
390         }
391 
392         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
393                            sizeof(syncpt))) {
394                 err = -EFAULT;
395                 goto fail;
396         }
397 
398         job->is_addr_reg = context->client->ops->is_addr_reg;
399         job->syncpt_incrs = syncpt.incrs;
400         job->syncpt_id = syncpt.id;
401         job->timeout = 10000;
402 
403         if (args->timeout && args->timeout < 10000)
404                 job->timeout = args->timeout;
405 
406         err = host1x_job_pin(job, context->client->base.dev);
407         if (err)
408                 goto fail;
409 
410         err = host1x_job_submit(job);
411         if (err)
412                 goto fail_submit;
413 
414         args->fence = job->syncpt_end;
415 
416         host1x_job_put(job);
417         return 0;
418 
419 fail_submit:
420         host1x_job_unpin(job);
421 fail:
422         host1x_job_put(job);
423         return err;
424 }
425 
426 
427 #ifdef CONFIG_DRM_TEGRA_STAGING
428 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
429 {
430         return (struct tegra_drm_context *)(uintptr_t)context;
431 }
432 
433 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
434                                         struct tegra_drm_context *context)
435 {
436         struct tegra_drm_context *ctx;
437 
438         list_for_each_entry(ctx, &file->contexts, list)
439                 if (ctx == context)
440                         return true;
441 
442         return false;
443 }
444 
445 static int tegra_gem_create(struct drm_device *drm, void *data,
446                             struct drm_file *file)
447 {
448         struct drm_tegra_gem_create *args = data;
449         struct tegra_bo *bo;
450 
451         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
452                                          &args->handle);
453         if (IS_ERR(bo))
454                 return PTR_ERR(bo);
455 
456         return 0;
457 }
458 
459 static int tegra_gem_mmap(struct drm_device *drm, void *data,
460                           struct drm_file *file)
461 {
462         struct drm_tegra_gem_mmap *args = data;
463         struct drm_gem_object *gem;
464         struct tegra_bo *bo;
465 
466         gem = drm_gem_object_lookup(drm, file, args->handle);
467         if (!gem)
468                 return -EINVAL;
469 
470         bo = to_tegra_bo(gem);
471 
472         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
473 
474         drm_gem_object_unreference_unlocked(gem);
475 
476         return 0;
477 }
478 
479 static int tegra_syncpt_read(struct drm_device *drm, void *data,
480                              struct drm_file *file)
481 {
482         struct host1x *host = dev_get_drvdata(drm->dev->parent);
483         struct drm_tegra_syncpt_read *args = data;
484         struct host1x_syncpt *sp;
485 
486         sp = host1x_syncpt_get(host, args->id);
487         if (!sp)
488                 return -EINVAL;
489 
490         args->value = host1x_syncpt_read_min(sp);
491         return 0;
492 }
493 
494 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
495                              struct drm_file *file)
496 {
497         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
498         struct drm_tegra_syncpt_incr *args = data;
499         struct host1x_syncpt *sp;
500 
501         sp = host1x_syncpt_get(host1x, args->id);
502         if (!sp)
503                 return -EINVAL;
504 
505         return host1x_syncpt_incr(sp);
506 }
507 
508 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
509                              struct drm_file *file)
510 {
511         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
512         struct drm_tegra_syncpt_wait *args = data;
513         struct host1x_syncpt *sp;
514 
515         sp = host1x_syncpt_get(host1x, args->id);
516         if (!sp)
517                 return -EINVAL;
518 
519         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
520                                   &args->value);
521 }
522 
523 static int tegra_open_channel(struct drm_device *drm, void *data,
524                               struct drm_file *file)
525 {
526         struct tegra_drm_file *fpriv = file->driver_priv;
527         struct tegra_drm *tegra = drm->dev_private;
528         struct drm_tegra_open_channel *args = data;
529         struct tegra_drm_context *context;
530         struct tegra_drm_client *client;
531         int err = -ENODEV;
532 
533         context = kzalloc(sizeof(*context), GFP_KERNEL);
534         if (!context)
535                 return -ENOMEM;
536 
537         list_for_each_entry(client, &tegra->clients, list)
538                 if (client->base.class == args->client) {
539                         err = client->ops->open_channel(client, context);
540                         if (err)
541                                 break;
542 
543                         list_add(&context->list, &fpriv->contexts);
544                         args->context = (uintptr_t)context;
545                         context->client = client;
546                         return 0;
547                 }
548 
549         kfree(context);
550         return err;
551 }
552 
553 static int tegra_close_channel(struct drm_device *drm, void *data,
554                                struct drm_file *file)
555 {
556         struct tegra_drm_file *fpriv = file->driver_priv;
557         struct drm_tegra_close_channel *args = data;
558         struct tegra_drm_context *context;
559 
560         context = tegra_drm_get_context(args->context);
561 
562         if (!tegra_drm_file_owns_context(fpriv, context))
563                 return -EINVAL;
564 
565         list_del(&context->list);
566         tegra_drm_context_free(context);
567 
568         return 0;
569 }
570 
571 static int tegra_get_syncpt(struct drm_device *drm, void *data,
572                             struct drm_file *file)
573 {
574         struct tegra_drm_file *fpriv = file->driver_priv;
575         struct drm_tegra_get_syncpt *args = data;
576         struct tegra_drm_context *context;
577         struct host1x_syncpt *syncpt;
578 
579         context = tegra_drm_get_context(args->context);
580 
581         if (!tegra_drm_file_owns_context(fpriv, context))
582                 return -ENODEV;
583 
584         if (args->index >= context->client->base.num_syncpts)
585                 return -EINVAL;
586 
587         syncpt = context->client->base.syncpts[args->index];
588         args->id = host1x_syncpt_id(syncpt);
589 
590         return 0;
591 }
592 
593 static int tegra_submit(struct drm_device *drm, void *data,
594                         struct drm_file *file)
595 {
596         struct tegra_drm_file *fpriv = file->driver_priv;
597         struct drm_tegra_submit *args = data;
598         struct tegra_drm_context *context;
599 
600         context = tegra_drm_get_context(args->context);
601 
602         if (!tegra_drm_file_owns_context(fpriv, context))
603                 return -ENODEV;
604 
605         return context->client->ops->submit(context, args, drm, file);
606 }
607 
608 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
609                                  struct drm_file *file)
610 {
611         struct tegra_drm_file *fpriv = file->driver_priv;
612         struct drm_tegra_get_syncpt_base *args = data;
613         struct tegra_drm_context *context;
614         struct host1x_syncpt_base *base;
615         struct host1x_syncpt *syncpt;
616 
617         context = tegra_drm_get_context(args->context);
618 
619         if (!tegra_drm_file_owns_context(fpriv, context))
620                 return -ENODEV;
621 
622         if (args->syncpt >= context->client->base.num_syncpts)
623                 return -EINVAL;
624 
625         syncpt = context->client->base.syncpts[args->syncpt];
626 
627         base = host1x_syncpt_get_base(syncpt);
628         if (!base)
629                 return -ENXIO;
630 
631         args->id = host1x_syncpt_base_id(base);
632 
633         return 0;
634 }
635 
636 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
637                                 struct drm_file *file)
638 {
639         struct drm_tegra_gem_set_tiling *args = data;
640         enum tegra_bo_tiling_mode mode;
641         struct drm_gem_object *gem;
642         unsigned long value = 0;
643         struct tegra_bo *bo;
644 
645         switch (args->mode) {
646         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
647                 mode = TEGRA_BO_TILING_MODE_PITCH;
648 
649                 if (args->value != 0)
650                         return -EINVAL;
651 
652                 break;
653 
654         case DRM_TEGRA_GEM_TILING_MODE_TILED:
655                 mode = TEGRA_BO_TILING_MODE_TILED;
656 
657                 if (args->value != 0)
658                         return -EINVAL;
659 
660                 break;
661 
662         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
663                 mode = TEGRA_BO_TILING_MODE_BLOCK;
664 
665                 if (args->value > 5)
666                         return -EINVAL;
667 
668                 value = args->value;
669                 break;
670 
671         default:
672                 return -EINVAL;
673         }
674 
675         gem = drm_gem_object_lookup(drm, file, args->handle);
676         if (!gem)
677                 return -ENOENT;
678 
679         bo = to_tegra_bo(gem);
680 
681         bo->tiling.mode = mode;
682         bo->tiling.value = value;
683 
684         drm_gem_object_unreference_unlocked(gem);
685 
686         return 0;
687 }
688 
689 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
690                                 struct drm_file *file)
691 {
692         struct drm_tegra_gem_get_tiling *args = data;
693         struct drm_gem_object *gem;
694         struct tegra_bo *bo;
695         int err = 0;
696 
697         gem = drm_gem_object_lookup(drm, file, args->handle);
698         if (!gem)
699                 return -ENOENT;
700 
701         bo = to_tegra_bo(gem);
702 
703         switch (bo->tiling.mode) {
704         case TEGRA_BO_TILING_MODE_PITCH:
705                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
706                 args->value = 0;
707                 break;
708 
709         case TEGRA_BO_TILING_MODE_TILED:
710                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
711                 args->value = 0;
712                 break;
713 
714         case TEGRA_BO_TILING_MODE_BLOCK:
715                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
716                 args->value = bo->tiling.value;
717                 break;
718 
719         default:
720                 err = -EINVAL;
721                 break;
722         }
723 
724         drm_gem_object_unreference_unlocked(gem);
725 
726         return err;
727 }
728 
729 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
730                                struct drm_file *file)
731 {
732         struct drm_tegra_gem_set_flags *args = data;
733         struct drm_gem_object *gem;
734         struct tegra_bo *bo;
735 
736         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
737                 return -EINVAL;
738 
739         gem = drm_gem_object_lookup(drm, file, args->handle);
740         if (!gem)
741                 return -ENOENT;
742 
743         bo = to_tegra_bo(gem);
744         bo->flags = 0;
745 
746         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
747                 bo->flags |= TEGRA_BO_BOTTOM_UP;
748 
749         drm_gem_object_unreference_unlocked(gem);
750 
751         return 0;
752 }
753 
754 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
755                                struct drm_file *file)
756 {
757         struct drm_tegra_gem_get_flags *args = data;
758         struct drm_gem_object *gem;
759         struct tegra_bo *bo;
760 
761         gem = drm_gem_object_lookup(drm, file, args->handle);
762         if (!gem)
763                 return -ENOENT;
764 
765         bo = to_tegra_bo(gem);
766         args->flags = 0;
767 
768         if (bo->flags & TEGRA_BO_BOTTOM_UP)
769                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
770 
771         drm_gem_object_unreference_unlocked(gem);
772 
773         return 0;
774 }
775 #endif
776 
777 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
778 #ifdef CONFIG_DRM_TEGRA_STAGING
779         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, 0),
780         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, 0),
781         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, 0),
782         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, 0),
783         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, 0),
784         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, 0),
785         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, 0),
786         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, 0),
787         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, 0),
788         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, 0),
789         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, 0),
790         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, 0),
791         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, 0),
792         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, 0),
793 #endif
794 };
795 
796 static const struct file_operations tegra_drm_fops = {
797         .owner = THIS_MODULE,
798         .open = drm_open,
799         .release = drm_release,
800         .unlocked_ioctl = drm_ioctl,
801         .mmap = tegra_drm_mmap,
802         .poll = drm_poll,
803         .read = drm_read,
804 #ifdef CONFIG_COMPAT
805         .compat_ioctl = drm_compat_ioctl,
806 #endif
807         .llseek = noop_llseek,
808 };
809 
810 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
811                                              unsigned int pipe)
812 {
813         struct drm_crtc *crtc;
814 
815         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
816                 if (pipe == drm_crtc_index(crtc))
817                         return crtc;
818         }
819 
820         return NULL;
821 }
822 
823 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm,
824                                         unsigned 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 0;
831 
832         return tegra_dc_get_vblank_counter(dc);
833 }
834 
835 static int tegra_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
836 {
837         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
838         struct tegra_dc *dc = to_tegra_dc(crtc);
839 
840         if (!crtc)
841                 return -ENODEV;
842 
843         tegra_dc_enable_vblank(dc);
844 
845         return 0;
846 }
847 
848 static void tegra_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
849 {
850         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
851         struct tegra_dc *dc = to_tegra_dc(crtc);
852 
853         if (crtc)
854                 tegra_dc_disable_vblank(dc);
855 }
856 
857 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
858 {
859         struct tegra_drm_file *fpriv = file->driver_priv;
860         struct tegra_drm_context *context, *tmp;
861 
862         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
863                 tegra_drm_context_free(context);
864 
865         kfree(fpriv);
866 }
867 
868 #ifdef CONFIG_DEBUG_FS
869 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
870 {
871         struct drm_info_node *node = (struct drm_info_node *)s->private;
872         struct drm_device *drm = node->minor->dev;
873         struct drm_framebuffer *fb;
874 
875         mutex_lock(&drm->mode_config.fb_lock);
876 
877         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
878                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
879                            fb->base.id, fb->width, fb->height, fb->depth,
880                            fb->bits_per_pixel,
881                            atomic_read(&fb->refcount.refcount));
882         }
883 
884         mutex_unlock(&drm->mode_config.fb_lock);
885 
886         return 0;
887 }
888 
889 static int tegra_debugfs_iova(struct seq_file *s, void *data)
890 {
891         struct drm_info_node *node = (struct drm_info_node *)s->private;
892         struct drm_device *drm = node->minor->dev;
893         struct tegra_drm *tegra = drm->dev_private;
894 
895         return drm_mm_dump_table(s, &tegra->mm);
896 }
897 
898 static struct drm_info_list tegra_debugfs_list[] = {
899         { "framebuffers", tegra_debugfs_framebuffers, 0 },
900         { "iova", tegra_debugfs_iova, 0 },
901 };
902 
903 static int tegra_debugfs_init(struct drm_minor *minor)
904 {
905         return drm_debugfs_create_files(tegra_debugfs_list,
906                                         ARRAY_SIZE(tegra_debugfs_list),
907                                         minor->debugfs_root, minor);
908 }
909 
910 static void tegra_debugfs_cleanup(struct drm_minor *minor)
911 {
912         drm_debugfs_remove_files(tegra_debugfs_list,
913                                  ARRAY_SIZE(tegra_debugfs_list), minor);
914 }
915 #endif
916 
917 static struct drm_driver tegra_drm_driver = {
918         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
919                            DRIVER_ATOMIC,
920         .load = tegra_drm_load,
921         .unload = tegra_drm_unload,
922         .open = tegra_drm_open,
923         .preclose = tegra_drm_preclose,
924         .lastclose = tegra_drm_lastclose,
925 
926         .get_vblank_counter = tegra_drm_get_vblank_counter,
927         .enable_vblank = tegra_drm_enable_vblank,
928         .disable_vblank = tegra_drm_disable_vblank,
929 
930 #if defined(CONFIG_DEBUG_FS)
931         .debugfs_init = tegra_debugfs_init,
932         .debugfs_cleanup = tegra_debugfs_cleanup,
933 #endif
934 
935         .gem_free_object = tegra_bo_free_object,
936         .gem_vm_ops = &tegra_bo_vm_ops,
937 
938         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
939         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
940         .gem_prime_export = tegra_gem_prime_export,
941         .gem_prime_import = tegra_gem_prime_import,
942 
943         .dumb_create = tegra_bo_dumb_create,
944         .dumb_map_offset = tegra_bo_dumb_map_offset,
945         .dumb_destroy = drm_gem_dumb_destroy,
946 
947         .ioctls = tegra_drm_ioctls,
948         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
949         .fops = &tegra_drm_fops,
950 
951         .name = DRIVER_NAME,
952         .desc = DRIVER_DESC,
953         .date = DRIVER_DATE,
954         .major = DRIVER_MAJOR,
955         .minor = DRIVER_MINOR,
956         .patchlevel = DRIVER_PATCHLEVEL,
957 };
958 
959 int tegra_drm_register_client(struct tegra_drm *tegra,
960                               struct tegra_drm_client *client)
961 {
962         mutex_lock(&tegra->clients_lock);
963         list_add_tail(&client->list, &tegra->clients);
964         mutex_unlock(&tegra->clients_lock);
965 
966         return 0;
967 }
968 
969 int tegra_drm_unregister_client(struct tegra_drm *tegra,
970                                 struct tegra_drm_client *client)
971 {
972         mutex_lock(&tegra->clients_lock);
973         list_del_init(&client->list);
974         mutex_unlock(&tegra->clients_lock);
975 
976         return 0;
977 }
978 
979 static int host1x_drm_probe(struct host1x_device *dev)
980 {
981         struct drm_driver *driver = &tegra_drm_driver;
982         struct drm_device *drm;
983         int err;
984 
985         drm = drm_dev_alloc(driver, &dev->dev);
986         if (!drm)
987                 return -ENOMEM;
988 
989         dev_set_drvdata(&dev->dev, drm);
990 
991         err = drm_dev_register(drm, 0);
992         if (err < 0)
993                 goto unref;
994 
995         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
996                  driver->major, driver->minor, driver->patchlevel,
997                  driver->date, drm->primary->index);
998 
999         return 0;
1000 
1001 unref:
1002         drm_dev_unref(drm);
1003         return err;
1004 }
1005 
1006 static int host1x_drm_remove(struct host1x_device *dev)
1007 {
1008         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1009 
1010         drm_dev_unregister(drm);
1011         drm_dev_unref(drm);
1012 
1013         return 0;
1014 }
1015 
1016 #ifdef CONFIG_PM_SLEEP
1017 static int host1x_drm_suspend(struct device *dev)
1018 {
1019         struct drm_device *drm = dev_get_drvdata(dev);
1020         struct tegra_drm *tegra = drm->dev_private;
1021 
1022         drm_kms_helper_poll_disable(drm);
1023         tegra_drm_fb_suspend(drm);
1024 
1025         tegra->state = drm_atomic_helper_suspend(drm);
1026         if (IS_ERR(tegra->state)) {
1027                 tegra_drm_fb_resume(drm);
1028                 drm_kms_helper_poll_enable(drm);
1029                 return PTR_ERR(tegra->state);
1030         }
1031 
1032         return 0;
1033 }
1034 
1035 static int host1x_drm_resume(struct device *dev)
1036 {
1037         struct drm_device *drm = dev_get_drvdata(dev);
1038         struct tegra_drm *tegra = drm->dev_private;
1039 
1040         drm_atomic_helper_resume(drm, tegra->state);
1041         tegra_drm_fb_resume(drm);
1042         drm_kms_helper_poll_enable(drm);
1043 
1044         return 0;
1045 }
1046 #endif
1047 
1048 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1049                          host1x_drm_resume);
1050 
1051 static const struct of_device_id host1x_drm_subdevs[] = {
1052         { .compatible = "nvidia,tegra20-dc", },
1053         { .compatible = "nvidia,tegra20-hdmi", },
1054         { .compatible = "nvidia,tegra20-gr2d", },
1055         { .compatible = "nvidia,tegra20-gr3d", },
1056         { .compatible = "nvidia,tegra30-dc", },
1057         { .compatible = "nvidia,tegra30-hdmi", },
1058         { .compatible = "nvidia,tegra30-gr2d", },
1059         { .compatible = "nvidia,tegra30-gr3d", },
1060         { .compatible = "nvidia,tegra114-dsi", },
1061         { .compatible = "nvidia,tegra114-hdmi", },
1062         { .compatible = "nvidia,tegra114-gr3d", },
1063         { .compatible = "nvidia,tegra124-dc", },
1064         { .compatible = "nvidia,tegra124-sor", },
1065         { .compatible = "nvidia,tegra124-hdmi", },
1066         { .compatible = "nvidia,tegra124-dsi", },
1067         { .compatible = "nvidia,tegra132-dsi", },
1068         { .compatible = "nvidia,tegra210-dc", },
1069         { .compatible = "nvidia,tegra210-dsi", },
1070         { .compatible = "nvidia,tegra210-sor", },
1071         { .compatible = "nvidia,tegra210-sor1", },
1072         { /* sentinel */ }
1073 };
1074 
1075 static struct host1x_driver host1x_drm_driver = {
1076         .driver = {
1077                 .name = "drm",
1078                 .pm = &host1x_drm_pm_ops,
1079         },
1080         .probe = host1x_drm_probe,
1081         .remove = host1x_drm_remove,
1082         .subdevs = host1x_drm_subdevs,
1083 };
1084 
1085 static struct platform_driver * const drivers[] = {
1086         &tegra_dc_driver,
1087         &tegra_hdmi_driver,
1088         &tegra_dsi_driver,
1089         &tegra_dpaux_driver,
1090         &tegra_sor_driver,
1091         &tegra_gr2d_driver,
1092         &tegra_gr3d_driver,
1093 };
1094 
1095 static int __init host1x_drm_init(void)
1096 {
1097         int err;
1098 
1099         err = host1x_driver_register(&host1x_drm_driver);
1100         if (err < 0)
1101                 return err;
1102 
1103         err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1104         if (err < 0)
1105                 goto unregister_host1x;
1106 
1107         return 0;
1108 
1109 unregister_host1x:
1110         host1x_driver_unregister(&host1x_drm_driver);
1111         return err;
1112 }
1113 module_init(host1x_drm_init);
1114 
1115 static void __exit host1x_drm_exit(void)
1116 {
1117         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1118         host1x_driver_unregister(&host1x_drm_driver);
1119 }
1120 module_exit(host1x_drm_exit);
1121 
1122 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1123 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1124 MODULE_LICENSE("GPL v2");
1125 

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