Version:  2.0.40 2.2.26 2.4.37 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 4.1 4.2 4.3 4.4

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_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                 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("IOMMU context initialized (aperture: %#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_TEGRA_FBDEV
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         mutex_lock(&drm->struct_mutex);
281         drm_gem_object_unreference(gem);
282         mutex_unlock(&drm->struct_mutex);
283 
284         bo = to_tegra_bo(gem);
285         return &bo->base;
286 }
287 
288 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
289                                        struct drm_tegra_reloc __user *src,
290                                        struct drm_device *drm,
291                                        struct drm_file *file)
292 {
293         u32 cmdbuf, target;
294         int err;
295 
296         err = get_user(cmdbuf, &src->cmdbuf.handle);
297         if (err < 0)
298                 return err;
299 
300         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
301         if (err < 0)
302                 return err;
303 
304         err = get_user(target, &src->target.handle);
305         if (err < 0)
306                 return err;
307 
308         err = get_user(dest->target.offset, &src->target.offset);
309         if (err < 0)
310                 return err;
311 
312         err = get_user(dest->shift, &src->shift);
313         if (err < 0)
314                 return err;
315 
316         dest->cmdbuf.bo = host1x_bo_lookup(drm, file, cmdbuf);
317         if (!dest->cmdbuf.bo)
318                 return -ENOENT;
319 
320         dest->target.bo = host1x_bo_lookup(drm, file, target);
321         if (!dest->target.bo)
322                 return -ENOENT;
323 
324         return 0;
325 }
326 
327 int tegra_drm_submit(struct tegra_drm_context *context,
328                      struct drm_tegra_submit *args, struct drm_device *drm,
329                      struct drm_file *file)
330 {
331         unsigned int num_cmdbufs = args->num_cmdbufs;
332         unsigned int num_relocs = args->num_relocs;
333         unsigned int num_waitchks = args->num_waitchks;
334         struct drm_tegra_cmdbuf __user *cmdbufs =
335                 (void __user *)(uintptr_t)args->cmdbufs;
336         struct drm_tegra_reloc __user *relocs =
337                 (void __user *)(uintptr_t)args->relocs;
338         struct drm_tegra_waitchk __user *waitchks =
339                 (void __user *)(uintptr_t)args->waitchks;
340         struct drm_tegra_syncpt syncpt;
341         struct host1x_job *job;
342         int err;
343 
344         /* We don't yet support other than one syncpt_incr struct per submit */
345         if (args->num_syncpts != 1)
346                 return -EINVAL;
347 
348         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
349                                args->num_relocs, args->num_waitchks);
350         if (!job)
351                 return -ENOMEM;
352 
353         job->num_relocs = args->num_relocs;
354         job->num_waitchk = args->num_waitchks;
355         job->client = (u32)args->context;
356         job->class = context->client->base.class;
357         job->serialize = true;
358 
359         while (num_cmdbufs) {
360                 struct drm_tegra_cmdbuf cmdbuf;
361                 struct host1x_bo *bo;
362 
363                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
364                         err = -EFAULT;
365                         goto fail;
366                 }
367 
368                 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
369                 if (!bo) {
370                         err = -ENOENT;
371                         goto fail;
372                 }
373 
374                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
375                 num_cmdbufs--;
376                 cmdbufs++;
377         }
378 
379         /* copy and resolve relocations from submit */
380         while (num_relocs--) {
381                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
382                                                   &relocs[num_relocs], drm,
383                                                   file);
384                 if (err < 0)
385                         goto fail;
386         }
387 
388         if (copy_from_user(job->waitchk, waitchks,
389                            sizeof(*waitchks) * num_waitchks)) {
390                 err = -EFAULT;
391                 goto fail;
392         }
393 
394         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
395                            sizeof(syncpt))) {
396                 err = -EFAULT;
397                 goto fail;
398         }
399 
400         job->is_addr_reg = context->client->ops->is_addr_reg;
401         job->syncpt_incrs = syncpt.incrs;
402         job->syncpt_id = syncpt.id;
403         job->timeout = 10000;
404 
405         if (args->timeout && args->timeout < 10000)
406                 job->timeout = args->timeout;
407 
408         err = host1x_job_pin(job, context->client->base.dev);
409         if (err)
410                 goto fail;
411 
412         err = host1x_job_submit(job);
413         if (err)
414                 goto fail_submit;
415 
416         args->fence = job->syncpt_end;
417 
418         host1x_job_put(job);
419         return 0;
420 
421 fail_submit:
422         host1x_job_unpin(job);
423 fail:
424         host1x_job_put(job);
425         return err;
426 }
427 
428 
429 #ifdef CONFIG_DRM_TEGRA_STAGING
430 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
431 {
432         return (struct tegra_drm_context *)(uintptr_t)context;
433 }
434 
435 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
436                                         struct tegra_drm_context *context)
437 {
438         struct tegra_drm_context *ctx;
439 
440         list_for_each_entry(ctx, &file->contexts, list)
441                 if (ctx == context)
442                         return true;
443 
444         return false;
445 }
446 
447 static int tegra_gem_create(struct drm_device *drm, void *data,
448                             struct drm_file *file)
449 {
450         struct drm_tegra_gem_create *args = data;
451         struct tegra_bo *bo;
452 
453         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
454                                          &args->handle);
455         if (IS_ERR(bo))
456                 return PTR_ERR(bo);
457 
458         return 0;
459 }
460 
461 static int tegra_gem_mmap(struct drm_device *drm, void *data,
462                           struct drm_file *file)
463 {
464         struct drm_tegra_gem_mmap *args = data;
465         struct drm_gem_object *gem;
466         struct tegra_bo *bo;
467 
468         gem = drm_gem_object_lookup(drm, file, args->handle);
469         if (!gem)
470                 return -EINVAL;
471 
472         bo = to_tegra_bo(gem);
473 
474         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
475 
476         drm_gem_object_unreference(gem);
477 
478         return 0;
479 }
480 
481 static int tegra_syncpt_read(struct drm_device *drm, void *data,
482                              struct drm_file *file)
483 {
484         struct host1x *host = dev_get_drvdata(drm->dev->parent);
485         struct drm_tegra_syncpt_read *args = data;
486         struct host1x_syncpt *sp;
487 
488         sp = host1x_syncpt_get(host, args->id);
489         if (!sp)
490                 return -EINVAL;
491 
492         args->value = host1x_syncpt_read_min(sp);
493         return 0;
494 }
495 
496 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
497                              struct drm_file *file)
498 {
499         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
500         struct drm_tegra_syncpt_incr *args = data;
501         struct host1x_syncpt *sp;
502 
503         sp = host1x_syncpt_get(host1x, args->id);
504         if (!sp)
505                 return -EINVAL;
506 
507         return host1x_syncpt_incr(sp);
508 }
509 
510 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
511                              struct drm_file *file)
512 {
513         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
514         struct drm_tegra_syncpt_wait *args = data;
515         struct host1x_syncpt *sp;
516 
517         sp = host1x_syncpt_get(host1x, args->id);
518         if (!sp)
519                 return -EINVAL;
520 
521         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
522                                   &args->value);
523 }
524 
525 static int tegra_open_channel(struct drm_device *drm, void *data,
526                               struct drm_file *file)
527 {
528         struct tegra_drm_file *fpriv = file->driver_priv;
529         struct tegra_drm *tegra = drm->dev_private;
530         struct drm_tegra_open_channel *args = data;
531         struct tegra_drm_context *context;
532         struct tegra_drm_client *client;
533         int err = -ENODEV;
534 
535         context = kzalloc(sizeof(*context), GFP_KERNEL);
536         if (!context)
537                 return -ENOMEM;
538 
539         list_for_each_entry(client, &tegra->clients, list)
540                 if (client->base.class == args->client) {
541                         err = client->ops->open_channel(client, context);
542                         if (err)
543                                 break;
544 
545                         list_add(&context->list, &fpriv->contexts);
546                         args->context = (uintptr_t)context;
547                         context->client = client;
548                         return 0;
549                 }
550 
551         kfree(context);
552         return err;
553 }
554 
555 static int tegra_close_channel(struct drm_device *drm, void *data,
556                                struct drm_file *file)
557 {
558         struct tegra_drm_file *fpriv = file->driver_priv;
559         struct drm_tegra_close_channel *args = data;
560         struct tegra_drm_context *context;
561 
562         context = tegra_drm_get_context(args->context);
563 
564         if (!tegra_drm_file_owns_context(fpriv, context))
565                 return -EINVAL;
566 
567         list_del(&context->list);
568         tegra_drm_context_free(context);
569 
570         return 0;
571 }
572 
573 static int tegra_get_syncpt(struct drm_device *drm, void *data,
574                             struct drm_file *file)
575 {
576         struct tegra_drm_file *fpriv = file->driver_priv;
577         struct drm_tegra_get_syncpt *args = data;
578         struct tegra_drm_context *context;
579         struct host1x_syncpt *syncpt;
580 
581         context = tegra_drm_get_context(args->context);
582 
583         if (!tegra_drm_file_owns_context(fpriv, context))
584                 return -ENODEV;
585 
586         if (args->index >= context->client->base.num_syncpts)
587                 return -EINVAL;
588 
589         syncpt = context->client->base.syncpts[args->index];
590         args->id = host1x_syncpt_id(syncpt);
591 
592         return 0;
593 }
594 
595 static int tegra_submit(struct drm_device *drm, void *data,
596                         struct drm_file *file)
597 {
598         struct tegra_drm_file *fpriv = file->driver_priv;
599         struct drm_tegra_submit *args = data;
600         struct tegra_drm_context *context;
601 
602         context = tegra_drm_get_context(args->context);
603 
604         if (!tegra_drm_file_owns_context(fpriv, context))
605                 return -ENODEV;
606 
607         return context->client->ops->submit(context, args, drm, file);
608 }
609 
610 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
611                                  struct drm_file *file)
612 {
613         struct tegra_drm_file *fpriv = file->driver_priv;
614         struct drm_tegra_get_syncpt_base *args = data;
615         struct tegra_drm_context *context;
616         struct host1x_syncpt_base *base;
617         struct host1x_syncpt *syncpt;
618 
619         context = tegra_drm_get_context(args->context);
620 
621         if (!tegra_drm_file_owns_context(fpriv, context))
622                 return -ENODEV;
623 
624         if (args->syncpt >= context->client->base.num_syncpts)
625                 return -EINVAL;
626 
627         syncpt = context->client->base.syncpts[args->syncpt];
628 
629         base = host1x_syncpt_get_base(syncpt);
630         if (!base)
631                 return -ENXIO;
632 
633         args->id = host1x_syncpt_base_id(base);
634 
635         return 0;
636 }
637 
638 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
639                                 struct drm_file *file)
640 {
641         struct drm_tegra_gem_set_tiling *args = data;
642         enum tegra_bo_tiling_mode mode;
643         struct drm_gem_object *gem;
644         unsigned long value = 0;
645         struct tegra_bo *bo;
646 
647         switch (args->mode) {
648         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
649                 mode = TEGRA_BO_TILING_MODE_PITCH;
650 
651                 if (args->value != 0)
652                         return -EINVAL;
653 
654                 break;
655 
656         case DRM_TEGRA_GEM_TILING_MODE_TILED:
657                 mode = TEGRA_BO_TILING_MODE_TILED;
658 
659                 if (args->value != 0)
660                         return -EINVAL;
661 
662                 break;
663 
664         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
665                 mode = TEGRA_BO_TILING_MODE_BLOCK;
666 
667                 if (args->value > 5)
668                         return -EINVAL;
669 
670                 value = args->value;
671                 break;
672 
673         default:
674                 return -EINVAL;
675         }
676 
677         gem = drm_gem_object_lookup(drm, file, args->handle);
678         if (!gem)
679                 return -ENOENT;
680 
681         bo = to_tegra_bo(gem);
682 
683         bo->tiling.mode = mode;
684         bo->tiling.value = value;
685 
686         drm_gem_object_unreference(gem);
687 
688         return 0;
689 }
690 
691 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
692                                 struct drm_file *file)
693 {
694         struct drm_tegra_gem_get_tiling *args = data;
695         struct drm_gem_object *gem;
696         struct tegra_bo *bo;
697         int err = 0;
698 
699         gem = drm_gem_object_lookup(drm, file, args->handle);
700         if (!gem)
701                 return -ENOENT;
702 
703         bo = to_tegra_bo(gem);
704 
705         switch (bo->tiling.mode) {
706         case TEGRA_BO_TILING_MODE_PITCH:
707                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
708                 args->value = 0;
709                 break;
710 
711         case TEGRA_BO_TILING_MODE_TILED:
712                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
713                 args->value = 0;
714                 break;
715 
716         case TEGRA_BO_TILING_MODE_BLOCK:
717                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
718                 args->value = bo->tiling.value;
719                 break;
720 
721         default:
722                 err = -EINVAL;
723                 break;
724         }
725 
726         drm_gem_object_unreference(gem);
727 
728         return err;
729 }
730 
731 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
732                                struct drm_file *file)
733 {
734         struct drm_tegra_gem_set_flags *args = data;
735         struct drm_gem_object *gem;
736         struct tegra_bo *bo;
737 
738         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
739                 return -EINVAL;
740 
741         gem = drm_gem_object_lookup(drm, file, args->handle);
742         if (!gem)
743                 return -ENOENT;
744 
745         bo = to_tegra_bo(gem);
746         bo->flags = 0;
747 
748         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
749                 bo->flags |= TEGRA_BO_BOTTOM_UP;
750 
751         drm_gem_object_unreference(gem);
752 
753         return 0;
754 }
755 
756 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
757                                struct drm_file *file)
758 {
759         struct drm_tegra_gem_get_flags *args = data;
760         struct drm_gem_object *gem;
761         struct tegra_bo *bo;
762 
763         gem = drm_gem_object_lookup(drm, file, args->handle);
764         if (!gem)
765                 return -ENOENT;
766 
767         bo = to_tegra_bo(gem);
768         args->flags = 0;
769 
770         if (bo->flags & TEGRA_BO_BOTTOM_UP)
771                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
772 
773         drm_gem_object_unreference(gem);
774 
775         return 0;
776 }
777 #endif
778 
779 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
780 #ifdef CONFIG_DRM_TEGRA_STAGING
781         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, 0),
782         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, 0),
783         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, 0),
784         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, 0),
785         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, 0),
786         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, 0),
787         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, 0),
788         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, 0),
789         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, 0),
790         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, 0),
791         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, 0),
792         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, 0),
793         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, 0),
794         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, 0),
795 #endif
796 };
797 
798 static const struct file_operations tegra_drm_fops = {
799         .owner = THIS_MODULE,
800         .open = drm_open,
801         .release = drm_release,
802         .unlocked_ioctl = drm_ioctl,
803         .mmap = tegra_drm_mmap,
804         .poll = drm_poll,
805         .read = drm_read,
806 #ifdef CONFIG_COMPAT
807         .compat_ioctl = drm_compat_ioctl,
808 #endif
809         .llseek = noop_llseek,
810 };
811 
812 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
813                                              unsigned int pipe)
814 {
815         struct drm_crtc *crtc;
816 
817         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
818                 if (pipe == drm_crtc_index(crtc))
819                         return crtc;
820         }
821 
822         return NULL;
823 }
824 
825 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm,
826                                         unsigned int pipe)
827 {
828         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
829         struct tegra_dc *dc = to_tegra_dc(crtc);
830 
831         if (!crtc)
832                 return 0;
833 
834         return tegra_dc_get_vblank_counter(dc);
835 }
836 
837 static int tegra_drm_enable_vblank(struct drm_device *drm, unsigned 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                 return -ENODEV;
844 
845         tegra_dc_enable_vblank(dc);
846 
847         return 0;
848 }
849 
850 static void tegra_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
851 {
852         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
853         struct tegra_dc *dc = to_tegra_dc(crtc);
854 
855         if (crtc)
856                 tegra_dc_disable_vblank(dc);
857 }
858 
859 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
860 {
861         struct tegra_drm_file *fpriv = file->driver_priv;
862         struct tegra_drm_context *context, *tmp;
863         struct drm_crtc *crtc;
864 
865         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
866                 tegra_dc_cancel_page_flip(crtc, file);
867 
868         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
869                 tegra_drm_context_free(context);
870 
871         kfree(fpriv);
872 }
873 
874 #ifdef CONFIG_DEBUG_FS
875 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
876 {
877         struct drm_info_node *node = (struct drm_info_node *)s->private;
878         struct drm_device *drm = node->minor->dev;
879         struct drm_framebuffer *fb;
880 
881         mutex_lock(&drm->mode_config.fb_lock);
882 
883         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
884                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
885                            fb->base.id, fb->width, fb->height, fb->depth,
886                            fb->bits_per_pixel,
887                            atomic_read(&fb->refcount.refcount));
888         }
889 
890         mutex_unlock(&drm->mode_config.fb_lock);
891 
892         return 0;
893 }
894 
895 static int tegra_debugfs_iova(struct seq_file *s, void *data)
896 {
897         struct drm_info_node *node = (struct drm_info_node *)s->private;
898         struct drm_device *drm = node->minor->dev;
899         struct tegra_drm *tegra = drm->dev_private;
900 
901         return drm_mm_dump_table(s, &tegra->mm);
902 }
903 
904 static struct drm_info_list tegra_debugfs_list[] = {
905         { "framebuffers", tegra_debugfs_framebuffers, 0 },
906         { "iova", tegra_debugfs_iova, 0 },
907 };
908 
909 static int tegra_debugfs_init(struct drm_minor *minor)
910 {
911         return drm_debugfs_create_files(tegra_debugfs_list,
912                                         ARRAY_SIZE(tegra_debugfs_list),
913                                         minor->debugfs_root, minor);
914 }
915 
916 static void tegra_debugfs_cleanup(struct drm_minor *minor)
917 {
918         drm_debugfs_remove_files(tegra_debugfs_list,
919                                  ARRAY_SIZE(tegra_debugfs_list), minor);
920 }
921 #endif
922 
923 static struct drm_driver tegra_drm_driver = {
924         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
925         .load = tegra_drm_load,
926         .unload = tegra_drm_unload,
927         .open = tegra_drm_open,
928         .preclose = tegra_drm_preclose,
929         .lastclose = tegra_drm_lastclose,
930 
931         .get_vblank_counter = tegra_drm_get_vblank_counter,
932         .enable_vblank = tegra_drm_enable_vblank,
933         .disable_vblank = tegra_drm_disable_vblank,
934 
935 #if defined(CONFIG_DEBUG_FS)
936         .debugfs_init = tegra_debugfs_init,
937         .debugfs_cleanup = tegra_debugfs_cleanup,
938 #endif
939 
940         .gem_free_object = tegra_bo_free_object,
941         .gem_vm_ops = &tegra_bo_vm_ops,
942 
943         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
944         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
945         .gem_prime_export = tegra_gem_prime_export,
946         .gem_prime_import = tegra_gem_prime_import,
947 
948         .dumb_create = tegra_bo_dumb_create,
949         .dumb_map_offset = tegra_bo_dumb_map_offset,
950         .dumb_destroy = drm_gem_dumb_destroy,
951 
952         .ioctls = tegra_drm_ioctls,
953         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
954         .fops = &tegra_drm_fops,
955 
956         .name = DRIVER_NAME,
957         .desc = DRIVER_DESC,
958         .date = DRIVER_DATE,
959         .major = DRIVER_MAJOR,
960         .minor = DRIVER_MINOR,
961         .patchlevel = DRIVER_PATCHLEVEL,
962 };
963 
964 int tegra_drm_register_client(struct tegra_drm *tegra,
965                               struct tegra_drm_client *client)
966 {
967         mutex_lock(&tegra->clients_lock);
968         list_add_tail(&client->list, &tegra->clients);
969         mutex_unlock(&tegra->clients_lock);
970 
971         return 0;
972 }
973 
974 int tegra_drm_unregister_client(struct tegra_drm *tegra,
975                                 struct tegra_drm_client *client)
976 {
977         mutex_lock(&tegra->clients_lock);
978         list_del_init(&client->list);
979         mutex_unlock(&tegra->clients_lock);
980 
981         return 0;
982 }
983 
984 static int host1x_drm_probe(struct host1x_device *dev)
985 {
986         struct drm_driver *driver = &tegra_drm_driver;
987         struct drm_device *drm;
988         int err;
989 
990         drm = drm_dev_alloc(driver, &dev->dev);
991         if (!drm)
992                 return -ENOMEM;
993 
994         drm_dev_set_unique(drm, dev_name(&dev->dev));
995         dev_set_drvdata(&dev->dev, drm);
996 
997         err = drm_dev_register(drm, 0);
998         if (err < 0)
999                 goto unref;
1000 
1001         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
1002                  driver->major, driver->minor, driver->patchlevel,
1003                  driver->date, drm->primary->index);
1004 
1005         return 0;
1006 
1007 unref:
1008         drm_dev_unref(drm);
1009         return err;
1010 }
1011 
1012 static int host1x_drm_remove(struct host1x_device *dev)
1013 {
1014         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1015 
1016         drm_dev_unregister(drm);
1017         drm_dev_unref(drm);
1018 
1019         return 0;
1020 }
1021 
1022 #ifdef CONFIG_PM_SLEEP
1023 static int host1x_drm_suspend(struct device *dev)
1024 {
1025         struct drm_device *drm = dev_get_drvdata(dev);
1026 
1027         drm_kms_helper_poll_disable(drm);
1028 
1029         return 0;
1030 }
1031 
1032 static int host1x_drm_resume(struct device *dev)
1033 {
1034         struct drm_device *drm = dev_get_drvdata(dev);
1035 
1036         drm_kms_helper_poll_enable(drm);
1037 
1038         return 0;
1039 }
1040 #endif
1041 
1042 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1043                          host1x_drm_resume);
1044 
1045 static const struct of_device_id host1x_drm_subdevs[] = {
1046         { .compatible = "nvidia,tegra20-dc", },
1047         { .compatible = "nvidia,tegra20-hdmi", },
1048         { .compatible = "nvidia,tegra20-gr2d", },
1049         { .compatible = "nvidia,tegra20-gr3d", },
1050         { .compatible = "nvidia,tegra30-dc", },
1051         { .compatible = "nvidia,tegra30-hdmi", },
1052         { .compatible = "nvidia,tegra30-gr2d", },
1053         { .compatible = "nvidia,tegra30-gr3d", },
1054         { .compatible = "nvidia,tegra114-dsi", },
1055         { .compatible = "nvidia,tegra114-hdmi", },
1056         { .compatible = "nvidia,tegra114-gr3d", },
1057         { .compatible = "nvidia,tegra124-dc", },
1058         { .compatible = "nvidia,tegra124-sor", },
1059         { .compatible = "nvidia,tegra124-hdmi", },
1060         { .compatible = "nvidia,tegra124-dsi", },
1061         { .compatible = "nvidia,tegra132-dsi", },
1062         { .compatible = "nvidia,tegra210-dc", },
1063         { .compatible = "nvidia,tegra210-dsi", },
1064         { .compatible = "nvidia,tegra210-sor", },
1065         { .compatible = "nvidia,tegra210-sor1", },
1066         { /* sentinel */ }
1067 };
1068 
1069 static struct host1x_driver host1x_drm_driver = {
1070         .driver = {
1071                 .name = "drm",
1072                 .pm = &host1x_drm_pm_ops,
1073         },
1074         .probe = host1x_drm_probe,
1075         .remove = host1x_drm_remove,
1076         .subdevs = host1x_drm_subdevs,
1077 };
1078 
1079 static int __init host1x_drm_init(void)
1080 {
1081         int err;
1082 
1083         err = host1x_driver_register(&host1x_drm_driver);
1084         if (err < 0)
1085                 return err;
1086 
1087         err = platform_driver_register(&tegra_dc_driver);
1088         if (err < 0)
1089                 goto unregister_host1x;
1090 
1091         err = platform_driver_register(&tegra_dsi_driver);
1092         if (err < 0)
1093                 goto unregister_dc;
1094 
1095         err = platform_driver_register(&tegra_sor_driver);
1096         if (err < 0)
1097                 goto unregister_dsi;
1098 
1099         err = platform_driver_register(&tegra_hdmi_driver);
1100         if (err < 0)
1101                 goto unregister_sor;
1102 
1103         err = platform_driver_register(&tegra_dpaux_driver);
1104         if (err < 0)
1105                 goto unregister_hdmi;
1106 
1107         err = platform_driver_register(&tegra_gr2d_driver);
1108         if (err < 0)
1109                 goto unregister_dpaux;
1110 
1111         err = platform_driver_register(&tegra_gr3d_driver);
1112         if (err < 0)
1113                 goto unregister_gr2d;
1114 
1115         return 0;
1116 
1117 unregister_gr2d:
1118         platform_driver_unregister(&tegra_gr2d_driver);
1119 unregister_dpaux:
1120         platform_driver_unregister(&tegra_dpaux_driver);
1121 unregister_hdmi:
1122         platform_driver_unregister(&tegra_hdmi_driver);
1123 unregister_sor:
1124         platform_driver_unregister(&tegra_sor_driver);
1125 unregister_dsi:
1126         platform_driver_unregister(&tegra_dsi_driver);
1127 unregister_dc:
1128         platform_driver_unregister(&tegra_dc_driver);
1129 unregister_host1x:
1130         host1x_driver_unregister(&host1x_drm_driver);
1131         return err;
1132 }
1133 module_init(host1x_drm_init);
1134 
1135 static void __exit host1x_drm_exit(void)
1136 {
1137         platform_driver_unregister(&tegra_gr3d_driver);
1138         platform_driver_unregister(&tegra_gr2d_driver);
1139         platform_driver_unregister(&tegra_dpaux_driver);
1140         platform_driver_unregister(&tegra_hdmi_driver);
1141         platform_driver_unregister(&tegra_sor_driver);
1142         platform_driver_unregister(&tegra_dsi_driver);
1143         platform_driver_unregister(&tegra_dc_driver);
1144         host1x_driver_unregister(&host1x_drm_driver);
1145 }
1146 module_exit(host1x_drm_exit);
1147 
1148 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1149 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1150 MODULE_LICENSE("GPL v2");
1151 

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