Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

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);
 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                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
128                 if (!tegra->domain) {
129                         err = -ENOMEM;
130                         goto free;
131                 }
132 
133                 DRM_DEBUG("IOMMU context initialized\n");
134                 drm_mm_init(&tegra->mm, 0, SZ_2G);
135         }
136 
137         mutex_init(&tegra->clients_lock);
138         INIT_LIST_HEAD(&tegra->clients);
139 
140         mutex_init(&tegra->commit.lock);
141         INIT_WORK(&tegra->commit.work, tegra_atomic_work);
142 
143         drm->dev_private = tegra;
144         tegra->drm = drm;
145 
146         drm_mode_config_init(drm);
147 
148         drm->mode_config.min_width = 0;
149         drm->mode_config.min_height = 0;
150 
151         drm->mode_config.max_width = 4096;
152         drm->mode_config.max_height = 4096;
153 
154         drm->mode_config.funcs = &tegra_drm_mode_funcs;
155 
156         err = tegra_drm_fb_prepare(drm);
157         if (err < 0)
158                 goto config;
159 
160         drm_kms_helper_poll_init(drm);
161 
162         err = host1x_device_init(device);
163         if (err < 0)
164                 goto fbdev;
165 
166         drm_mode_config_reset(drm);
167 
168         /*
169          * We don't use the drm_irq_install() helpers provided by the DRM
170          * core, so we need to set this manually in order to allow the
171          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
172          */
173         drm->irq_enabled = true;
174 
175         /* syncpoints are used for full 32-bit hardware VBLANK counters */
176         drm->max_vblank_count = 0xffffffff;
177 
178         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
179         if (err < 0)
180                 goto device;
181 
182         err = tegra_drm_fb_init(drm);
183         if (err < 0)
184                 goto vblank;
185 
186         return 0;
187 
188 vblank:
189         drm_vblank_cleanup(drm);
190 device:
191         host1x_device_exit(device);
192 fbdev:
193         drm_kms_helper_poll_fini(drm);
194         tegra_drm_fb_free(drm);
195 config:
196         drm_mode_config_cleanup(drm);
197 
198         if (tegra->domain) {
199                 iommu_domain_free(tegra->domain);
200                 drm_mm_takedown(&tegra->mm);
201         }
202 free:
203         kfree(tegra);
204         return err;
205 }
206 
207 static int tegra_drm_unload(struct drm_device *drm)
208 {
209         struct host1x_device *device = to_host1x_device(drm->dev);
210         struct tegra_drm *tegra = drm->dev_private;
211         int err;
212 
213         drm_kms_helper_poll_fini(drm);
214         tegra_drm_fb_exit(drm);
215         drm_mode_config_cleanup(drm);
216         drm_vblank_cleanup(drm);
217 
218         err = host1x_device_exit(device);
219         if (err < 0)
220                 return err;
221 
222         if (tegra->domain) {
223                 iommu_domain_free(tegra->domain);
224                 drm_mm_takedown(&tegra->mm);
225         }
226 
227         kfree(tegra);
228 
229         return 0;
230 }
231 
232 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
233 {
234         struct tegra_drm_file *fpriv;
235 
236         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
237         if (!fpriv)
238                 return -ENOMEM;
239 
240         INIT_LIST_HEAD(&fpriv->contexts);
241         filp->driver_priv = fpriv;
242 
243         return 0;
244 }
245 
246 static void tegra_drm_context_free(struct tegra_drm_context *context)
247 {
248         context->client->ops->close_channel(context);
249         kfree(context);
250 }
251 
252 static void tegra_drm_lastclose(struct drm_device *drm)
253 {
254 #ifdef CONFIG_DRM_TEGRA_FBDEV
255         struct tegra_drm *tegra = drm->dev_private;
256 
257         tegra_fbdev_restore_mode(tegra->fbdev);
258 #endif
259 }
260 
261 static struct host1x_bo *
262 host1x_bo_lookup(struct drm_device *drm, struct drm_file *file, u32 handle)
263 {
264         struct drm_gem_object *gem;
265         struct tegra_bo *bo;
266 
267         gem = drm_gem_object_lookup(drm, file, handle);
268         if (!gem)
269                 return NULL;
270 
271         mutex_lock(&drm->struct_mutex);
272         drm_gem_object_unreference(gem);
273         mutex_unlock(&drm->struct_mutex);
274 
275         bo = to_tegra_bo(gem);
276         return &bo->base;
277 }
278 
279 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
280                                        struct drm_tegra_reloc __user *src,
281                                        struct drm_device *drm,
282                                        struct drm_file *file)
283 {
284         u32 cmdbuf, target;
285         int err;
286 
287         err = get_user(cmdbuf, &src->cmdbuf.handle);
288         if (err < 0)
289                 return err;
290 
291         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
292         if (err < 0)
293                 return err;
294 
295         err = get_user(target, &src->target.handle);
296         if (err < 0)
297                 return err;
298 
299         err = get_user(dest->target.offset, &src->target.offset);
300         if (err < 0)
301                 return err;
302 
303         err = get_user(dest->shift, &src->shift);
304         if (err < 0)
305                 return err;
306 
307         dest->cmdbuf.bo = host1x_bo_lookup(drm, file, cmdbuf);
308         if (!dest->cmdbuf.bo)
309                 return -ENOENT;
310 
311         dest->target.bo = host1x_bo_lookup(drm, file, target);
312         if (!dest->target.bo)
313                 return -ENOENT;
314 
315         return 0;
316 }
317 
318 int tegra_drm_submit(struct tegra_drm_context *context,
319                      struct drm_tegra_submit *args, struct drm_device *drm,
320                      struct drm_file *file)
321 {
322         unsigned int num_cmdbufs = args->num_cmdbufs;
323         unsigned int num_relocs = args->num_relocs;
324         unsigned int num_waitchks = args->num_waitchks;
325         struct drm_tegra_cmdbuf __user *cmdbufs =
326                 (void __user *)(uintptr_t)args->cmdbufs;
327         struct drm_tegra_reloc __user *relocs =
328                 (void __user *)(uintptr_t)args->relocs;
329         struct drm_tegra_waitchk __user *waitchks =
330                 (void __user *)(uintptr_t)args->waitchks;
331         struct drm_tegra_syncpt syncpt;
332         struct host1x_job *job;
333         int err;
334 
335         /* We don't yet support other than one syncpt_incr struct per submit */
336         if (args->num_syncpts != 1)
337                 return -EINVAL;
338 
339         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
340                                args->num_relocs, args->num_waitchks);
341         if (!job)
342                 return -ENOMEM;
343 
344         job->num_relocs = args->num_relocs;
345         job->num_waitchk = args->num_waitchks;
346         job->client = (u32)args->context;
347         job->class = context->client->base.class;
348         job->serialize = true;
349 
350         while (num_cmdbufs) {
351                 struct drm_tegra_cmdbuf cmdbuf;
352                 struct host1x_bo *bo;
353 
354                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
355                         err = -EFAULT;
356                         goto fail;
357                 }
358 
359                 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
360                 if (!bo) {
361                         err = -ENOENT;
362                         goto fail;
363                 }
364 
365                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
366                 num_cmdbufs--;
367                 cmdbufs++;
368         }
369 
370         /* copy and resolve relocations from submit */
371         while (num_relocs--) {
372                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
373                                                   &relocs[num_relocs], drm,
374                                                   file);
375                 if (err < 0)
376                         goto fail;
377         }
378 
379         if (copy_from_user(job->waitchk, waitchks,
380                            sizeof(*waitchks) * num_waitchks)) {
381                 err = -EFAULT;
382                 goto fail;
383         }
384 
385         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
386                            sizeof(syncpt))) {
387                 err = -EFAULT;
388                 goto fail;
389         }
390 
391         job->is_addr_reg = context->client->ops->is_addr_reg;
392         job->syncpt_incrs = syncpt.incrs;
393         job->syncpt_id = syncpt.id;
394         job->timeout = 10000;
395 
396         if (args->timeout && args->timeout < 10000)
397                 job->timeout = args->timeout;
398 
399         err = host1x_job_pin(job, context->client->base.dev);
400         if (err)
401                 goto fail;
402 
403         err = host1x_job_submit(job);
404         if (err)
405                 goto fail_submit;
406 
407         args->fence = job->syncpt_end;
408 
409         host1x_job_put(job);
410         return 0;
411 
412 fail_submit:
413         host1x_job_unpin(job);
414 fail:
415         host1x_job_put(job);
416         return err;
417 }
418 
419 
420 #ifdef CONFIG_DRM_TEGRA_STAGING
421 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
422 {
423         return (struct tegra_drm_context *)(uintptr_t)context;
424 }
425 
426 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
427                                         struct tegra_drm_context *context)
428 {
429         struct tegra_drm_context *ctx;
430 
431         list_for_each_entry(ctx, &file->contexts, list)
432                 if (ctx == context)
433                         return true;
434 
435         return false;
436 }
437 
438 static int tegra_gem_create(struct drm_device *drm, void *data,
439                             struct drm_file *file)
440 {
441         struct drm_tegra_gem_create *args = data;
442         struct tegra_bo *bo;
443 
444         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
445                                          &args->handle);
446         if (IS_ERR(bo))
447                 return PTR_ERR(bo);
448 
449         return 0;
450 }
451 
452 static int tegra_gem_mmap(struct drm_device *drm, void *data,
453                           struct drm_file *file)
454 {
455         struct drm_tegra_gem_mmap *args = data;
456         struct drm_gem_object *gem;
457         struct tegra_bo *bo;
458 
459         gem = drm_gem_object_lookup(drm, file, args->handle);
460         if (!gem)
461                 return -EINVAL;
462 
463         bo = to_tegra_bo(gem);
464 
465         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
466 
467         drm_gem_object_unreference(gem);
468 
469         return 0;
470 }
471 
472 static int tegra_syncpt_read(struct drm_device *drm, void *data,
473                              struct drm_file *file)
474 {
475         struct host1x *host = dev_get_drvdata(drm->dev->parent);
476         struct drm_tegra_syncpt_read *args = data;
477         struct host1x_syncpt *sp;
478 
479         sp = host1x_syncpt_get(host, args->id);
480         if (!sp)
481                 return -EINVAL;
482 
483         args->value = host1x_syncpt_read_min(sp);
484         return 0;
485 }
486 
487 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
488                              struct drm_file *file)
489 {
490         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
491         struct drm_tegra_syncpt_incr *args = data;
492         struct host1x_syncpt *sp;
493 
494         sp = host1x_syncpt_get(host1x, args->id);
495         if (!sp)
496                 return -EINVAL;
497 
498         return host1x_syncpt_incr(sp);
499 }
500 
501 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
502                              struct drm_file *file)
503 {
504         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
505         struct drm_tegra_syncpt_wait *args = data;
506         struct host1x_syncpt *sp;
507 
508         sp = host1x_syncpt_get(host1x, args->id);
509         if (!sp)
510                 return -EINVAL;
511 
512         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
513                                   &args->value);
514 }
515 
516 static int tegra_open_channel(struct drm_device *drm, void *data,
517                               struct drm_file *file)
518 {
519         struct tegra_drm_file *fpriv = file->driver_priv;
520         struct tegra_drm *tegra = drm->dev_private;
521         struct drm_tegra_open_channel *args = data;
522         struct tegra_drm_context *context;
523         struct tegra_drm_client *client;
524         int err = -ENODEV;
525 
526         context = kzalloc(sizeof(*context), GFP_KERNEL);
527         if (!context)
528                 return -ENOMEM;
529 
530         list_for_each_entry(client, &tegra->clients, list)
531                 if (client->base.class == args->client) {
532                         err = client->ops->open_channel(client, context);
533                         if (err)
534                                 break;
535 
536                         list_add(&context->list, &fpriv->contexts);
537                         args->context = (uintptr_t)context;
538                         context->client = client;
539                         return 0;
540                 }
541 
542         kfree(context);
543         return err;
544 }
545 
546 static int tegra_close_channel(struct drm_device *drm, void *data,
547                                struct drm_file *file)
548 {
549         struct tegra_drm_file *fpriv = file->driver_priv;
550         struct drm_tegra_close_channel *args = data;
551         struct tegra_drm_context *context;
552 
553         context = tegra_drm_get_context(args->context);
554 
555         if (!tegra_drm_file_owns_context(fpriv, context))
556                 return -EINVAL;
557 
558         list_del(&context->list);
559         tegra_drm_context_free(context);
560 
561         return 0;
562 }
563 
564 static int tegra_get_syncpt(struct drm_device *drm, void *data,
565                             struct drm_file *file)
566 {
567         struct tegra_drm_file *fpriv = file->driver_priv;
568         struct drm_tegra_get_syncpt *args = data;
569         struct tegra_drm_context *context;
570         struct host1x_syncpt *syncpt;
571 
572         context = tegra_drm_get_context(args->context);
573 
574         if (!tegra_drm_file_owns_context(fpriv, context))
575                 return -ENODEV;
576 
577         if (args->index >= context->client->base.num_syncpts)
578                 return -EINVAL;
579 
580         syncpt = context->client->base.syncpts[args->index];
581         args->id = host1x_syncpt_id(syncpt);
582 
583         return 0;
584 }
585 
586 static int tegra_submit(struct drm_device *drm, void *data,
587                         struct drm_file *file)
588 {
589         struct tegra_drm_file *fpriv = file->driver_priv;
590         struct drm_tegra_submit *args = data;
591         struct tegra_drm_context *context;
592 
593         context = tegra_drm_get_context(args->context);
594 
595         if (!tegra_drm_file_owns_context(fpriv, context))
596                 return -ENODEV;
597 
598         return context->client->ops->submit(context, args, drm, file);
599 }
600 
601 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
602                                  struct drm_file *file)
603 {
604         struct tegra_drm_file *fpriv = file->driver_priv;
605         struct drm_tegra_get_syncpt_base *args = data;
606         struct tegra_drm_context *context;
607         struct host1x_syncpt_base *base;
608         struct host1x_syncpt *syncpt;
609 
610         context = tegra_drm_get_context(args->context);
611 
612         if (!tegra_drm_file_owns_context(fpriv, context))
613                 return -ENODEV;
614 
615         if (args->syncpt >= context->client->base.num_syncpts)
616                 return -EINVAL;
617 
618         syncpt = context->client->base.syncpts[args->syncpt];
619 
620         base = host1x_syncpt_get_base(syncpt);
621         if (!base)
622                 return -ENXIO;
623 
624         args->id = host1x_syncpt_base_id(base);
625 
626         return 0;
627 }
628 
629 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
630                                 struct drm_file *file)
631 {
632         struct drm_tegra_gem_set_tiling *args = data;
633         enum tegra_bo_tiling_mode mode;
634         struct drm_gem_object *gem;
635         unsigned long value = 0;
636         struct tegra_bo *bo;
637 
638         switch (args->mode) {
639         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
640                 mode = TEGRA_BO_TILING_MODE_PITCH;
641 
642                 if (args->value != 0)
643                         return -EINVAL;
644 
645                 break;
646 
647         case DRM_TEGRA_GEM_TILING_MODE_TILED:
648                 mode = TEGRA_BO_TILING_MODE_TILED;
649 
650                 if (args->value != 0)
651                         return -EINVAL;
652 
653                 break;
654 
655         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
656                 mode = TEGRA_BO_TILING_MODE_BLOCK;
657 
658                 if (args->value > 5)
659                         return -EINVAL;
660 
661                 value = args->value;
662                 break;
663 
664         default:
665                 return -EINVAL;
666         }
667 
668         gem = drm_gem_object_lookup(drm, file, args->handle);
669         if (!gem)
670                 return -ENOENT;
671 
672         bo = to_tegra_bo(gem);
673 
674         bo->tiling.mode = mode;
675         bo->tiling.value = value;
676 
677         drm_gem_object_unreference(gem);
678 
679         return 0;
680 }
681 
682 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
683                                 struct drm_file *file)
684 {
685         struct drm_tegra_gem_get_tiling *args = data;
686         struct drm_gem_object *gem;
687         struct tegra_bo *bo;
688         int err = 0;
689 
690         gem = drm_gem_object_lookup(drm, file, args->handle);
691         if (!gem)
692                 return -ENOENT;
693 
694         bo = to_tegra_bo(gem);
695 
696         switch (bo->tiling.mode) {
697         case TEGRA_BO_TILING_MODE_PITCH:
698                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
699                 args->value = 0;
700                 break;
701 
702         case TEGRA_BO_TILING_MODE_TILED:
703                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
704                 args->value = 0;
705                 break;
706 
707         case TEGRA_BO_TILING_MODE_BLOCK:
708                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
709                 args->value = bo->tiling.value;
710                 break;
711 
712         default:
713                 err = -EINVAL;
714                 break;
715         }
716 
717         drm_gem_object_unreference(gem);
718 
719         return err;
720 }
721 
722 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
723                                struct drm_file *file)
724 {
725         struct drm_tegra_gem_set_flags *args = data;
726         struct drm_gem_object *gem;
727         struct tegra_bo *bo;
728 
729         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
730                 return -EINVAL;
731 
732         gem = drm_gem_object_lookup(drm, file, args->handle);
733         if (!gem)
734                 return -ENOENT;
735 
736         bo = to_tegra_bo(gem);
737         bo->flags = 0;
738 
739         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
740                 bo->flags |= TEGRA_BO_BOTTOM_UP;
741 
742         drm_gem_object_unreference(gem);
743 
744         return 0;
745 }
746 
747 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
748                                struct drm_file *file)
749 {
750         struct drm_tegra_gem_get_flags *args = data;
751         struct drm_gem_object *gem;
752         struct tegra_bo *bo;
753 
754         gem = drm_gem_object_lookup(drm, file, args->handle);
755         if (!gem)
756                 return -ENOENT;
757 
758         bo = to_tegra_bo(gem);
759         args->flags = 0;
760 
761         if (bo->flags & TEGRA_BO_BOTTOM_UP)
762                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
763 
764         drm_gem_object_unreference(gem);
765 
766         return 0;
767 }
768 #endif
769 
770 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
771 #ifdef CONFIG_DRM_TEGRA_STAGING
772         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED),
773         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
774         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
775         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
776         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
777         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
778         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
779         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
780         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
781         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, DRM_UNLOCKED),
782         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, DRM_UNLOCKED),
783         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, DRM_UNLOCKED),
784         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, DRM_UNLOCKED),
785         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, DRM_UNLOCKED),
786 #endif
787 };
788 
789 static const struct file_operations tegra_drm_fops = {
790         .owner = THIS_MODULE,
791         .open = drm_open,
792         .release = drm_release,
793         .unlocked_ioctl = drm_ioctl,
794         .mmap = tegra_drm_mmap,
795         .poll = drm_poll,
796         .read = drm_read,
797 #ifdef CONFIG_COMPAT
798         .compat_ioctl = drm_compat_ioctl,
799 #endif
800         .llseek = noop_llseek,
801 };
802 
803 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
804                                              unsigned int pipe)
805 {
806         struct drm_crtc *crtc;
807 
808         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
809                 if (pipe == drm_crtc_index(crtc))
810                         return crtc;
811         }
812 
813         return NULL;
814 }
815 
816 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm, int pipe)
817 {
818         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
819         struct tegra_dc *dc = to_tegra_dc(crtc);
820 
821         if (!crtc)
822                 return 0;
823 
824         return tegra_dc_get_vblank_counter(dc);
825 }
826 
827 static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
828 {
829         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
830         struct tegra_dc *dc = to_tegra_dc(crtc);
831 
832         if (!crtc)
833                 return -ENODEV;
834 
835         tegra_dc_enable_vblank(dc);
836 
837         return 0;
838 }
839 
840 static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
841 {
842         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
843         struct tegra_dc *dc = to_tegra_dc(crtc);
844 
845         if (crtc)
846                 tegra_dc_disable_vblank(dc);
847 }
848 
849 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
850 {
851         struct tegra_drm_file *fpriv = file->driver_priv;
852         struct tegra_drm_context *context, *tmp;
853         struct drm_crtc *crtc;
854 
855         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
856                 tegra_dc_cancel_page_flip(crtc, file);
857 
858         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
859                 tegra_drm_context_free(context);
860 
861         kfree(fpriv);
862 }
863 
864 #ifdef CONFIG_DEBUG_FS
865 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
866 {
867         struct drm_info_node *node = (struct drm_info_node *)s->private;
868         struct drm_device *drm = node->minor->dev;
869         struct drm_framebuffer *fb;
870 
871         mutex_lock(&drm->mode_config.fb_lock);
872 
873         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
874                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
875                            fb->base.id, fb->width, fb->height, fb->depth,
876                            fb->bits_per_pixel,
877                            atomic_read(&fb->refcount.refcount));
878         }
879 
880         mutex_unlock(&drm->mode_config.fb_lock);
881 
882         return 0;
883 }
884 
885 static int tegra_debugfs_iova(struct seq_file *s, void *data)
886 {
887         struct drm_info_node *node = (struct drm_info_node *)s->private;
888         struct drm_device *drm = node->minor->dev;
889         struct tegra_drm *tegra = drm->dev_private;
890 
891         return drm_mm_dump_table(s, &tegra->mm);
892 }
893 
894 static struct drm_info_list tegra_debugfs_list[] = {
895         { "framebuffers", tegra_debugfs_framebuffers, 0 },
896         { "iova", tegra_debugfs_iova, 0 },
897 };
898 
899 static int tegra_debugfs_init(struct drm_minor *minor)
900 {
901         return drm_debugfs_create_files(tegra_debugfs_list,
902                                         ARRAY_SIZE(tegra_debugfs_list),
903                                         minor->debugfs_root, minor);
904 }
905 
906 static void tegra_debugfs_cleanup(struct drm_minor *minor)
907 {
908         drm_debugfs_remove_files(tegra_debugfs_list,
909                                  ARRAY_SIZE(tegra_debugfs_list), minor);
910 }
911 #endif
912 
913 static struct drm_driver tegra_drm_driver = {
914         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
915         .load = tegra_drm_load,
916         .unload = tegra_drm_unload,
917         .open = tegra_drm_open,
918         .preclose = tegra_drm_preclose,
919         .lastclose = tegra_drm_lastclose,
920 
921         .get_vblank_counter = tegra_drm_get_vblank_counter,
922         .enable_vblank = tegra_drm_enable_vblank,
923         .disable_vblank = tegra_drm_disable_vblank,
924 
925 #if defined(CONFIG_DEBUG_FS)
926         .debugfs_init = tegra_debugfs_init,
927         .debugfs_cleanup = tegra_debugfs_cleanup,
928 #endif
929 
930         .gem_free_object = tegra_bo_free_object,
931         .gem_vm_ops = &tegra_bo_vm_ops,
932 
933         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
934         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
935         .gem_prime_export = tegra_gem_prime_export,
936         .gem_prime_import = tegra_gem_prime_import,
937 
938         .dumb_create = tegra_bo_dumb_create,
939         .dumb_map_offset = tegra_bo_dumb_map_offset,
940         .dumb_destroy = drm_gem_dumb_destroy,
941 
942         .ioctls = tegra_drm_ioctls,
943         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
944         .fops = &tegra_drm_fops,
945 
946         .name = DRIVER_NAME,
947         .desc = DRIVER_DESC,
948         .date = DRIVER_DATE,
949         .major = DRIVER_MAJOR,
950         .minor = DRIVER_MINOR,
951         .patchlevel = DRIVER_PATCHLEVEL,
952 };
953 
954 int tegra_drm_register_client(struct tegra_drm *tegra,
955                               struct tegra_drm_client *client)
956 {
957         mutex_lock(&tegra->clients_lock);
958         list_add_tail(&client->list, &tegra->clients);
959         mutex_unlock(&tegra->clients_lock);
960 
961         return 0;
962 }
963 
964 int tegra_drm_unregister_client(struct tegra_drm *tegra,
965                                 struct tegra_drm_client *client)
966 {
967         mutex_lock(&tegra->clients_lock);
968         list_del_init(&client->list);
969         mutex_unlock(&tegra->clients_lock);
970 
971         return 0;
972 }
973 
974 static int host1x_drm_probe(struct host1x_device *dev)
975 {
976         struct drm_driver *driver = &tegra_drm_driver;
977         struct drm_device *drm;
978         int err;
979 
980         drm = drm_dev_alloc(driver, &dev->dev);
981         if (!drm)
982                 return -ENOMEM;
983 
984         drm_dev_set_unique(drm, dev_name(&dev->dev));
985         dev_set_drvdata(&dev->dev, drm);
986 
987         err = drm_dev_register(drm, 0);
988         if (err < 0)
989                 goto unref;
990 
991         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
992                  driver->major, driver->minor, driver->patchlevel,
993                  driver->date, drm->primary->index);
994 
995         return 0;
996 
997 unref:
998         drm_dev_unref(drm);
999         return err;
1000 }
1001 
1002 static int host1x_drm_remove(struct host1x_device *dev)
1003 {
1004         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1005 
1006         drm_dev_unregister(drm);
1007         drm_dev_unref(drm);
1008 
1009         return 0;
1010 }
1011 
1012 #ifdef CONFIG_PM_SLEEP
1013 static int host1x_drm_suspend(struct device *dev)
1014 {
1015         struct drm_device *drm = dev_get_drvdata(dev);
1016 
1017         drm_kms_helper_poll_disable(drm);
1018 
1019         return 0;
1020 }
1021 
1022 static int host1x_drm_resume(struct device *dev)
1023 {
1024         struct drm_device *drm = dev_get_drvdata(dev);
1025 
1026         drm_kms_helper_poll_enable(drm);
1027 
1028         return 0;
1029 }
1030 #endif
1031 
1032 static const struct dev_pm_ops host1x_drm_pm_ops = {
1033         SET_SYSTEM_SLEEP_PM_OPS(host1x_drm_suspend, host1x_drm_resume)
1034 };
1035 
1036 static const struct of_device_id host1x_drm_subdevs[] = {
1037         { .compatible = "nvidia,tegra20-dc", },
1038         { .compatible = "nvidia,tegra20-hdmi", },
1039         { .compatible = "nvidia,tegra20-gr2d", },
1040         { .compatible = "nvidia,tegra20-gr3d", },
1041         { .compatible = "nvidia,tegra30-dc", },
1042         { .compatible = "nvidia,tegra30-hdmi", },
1043         { .compatible = "nvidia,tegra30-gr2d", },
1044         { .compatible = "nvidia,tegra30-gr3d", },
1045         { .compatible = "nvidia,tegra114-dsi", },
1046         { .compatible = "nvidia,tegra114-hdmi", },
1047         { .compatible = "nvidia,tegra114-gr3d", },
1048         { .compatible = "nvidia,tegra124-dc", },
1049         { .compatible = "nvidia,tegra124-sor", },
1050         { .compatible = "nvidia,tegra124-hdmi", },
1051         { /* sentinel */ }
1052 };
1053 
1054 static struct host1x_driver host1x_drm_driver = {
1055         .driver = {
1056                 .name = "drm",
1057                 .pm = &host1x_drm_pm_ops,
1058         },
1059         .probe = host1x_drm_probe,
1060         .remove = host1x_drm_remove,
1061         .subdevs = host1x_drm_subdevs,
1062 };
1063 
1064 static int __init host1x_drm_init(void)
1065 {
1066         int err;
1067 
1068         err = host1x_driver_register(&host1x_drm_driver);
1069         if (err < 0)
1070                 return err;
1071 
1072         err = platform_driver_register(&tegra_dc_driver);
1073         if (err < 0)
1074                 goto unregister_host1x;
1075 
1076         err = platform_driver_register(&tegra_dsi_driver);
1077         if (err < 0)
1078                 goto unregister_dc;
1079 
1080         err = platform_driver_register(&tegra_sor_driver);
1081         if (err < 0)
1082                 goto unregister_dsi;
1083 
1084         err = platform_driver_register(&tegra_hdmi_driver);
1085         if (err < 0)
1086                 goto unregister_sor;
1087 
1088         err = platform_driver_register(&tegra_dpaux_driver);
1089         if (err < 0)
1090                 goto unregister_hdmi;
1091 
1092         err = platform_driver_register(&tegra_gr2d_driver);
1093         if (err < 0)
1094                 goto unregister_dpaux;
1095 
1096         err = platform_driver_register(&tegra_gr3d_driver);
1097         if (err < 0)
1098                 goto unregister_gr2d;
1099 
1100         return 0;
1101 
1102 unregister_gr2d:
1103         platform_driver_unregister(&tegra_gr2d_driver);
1104 unregister_dpaux:
1105         platform_driver_unregister(&tegra_dpaux_driver);
1106 unregister_hdmi:
1107         platform_driver_unregister(&tegra_hdmi_driver);
1108 unregister_sor:
1109         platform_driver_unregister(&tegra_sor_driver);
1110 unregister_dsi:
1111         platform_driver_unregister(&tegra_dsi_driver);
1112 unregister_dc:
1113         platform_driver_unregister(&tegra_dc_driver);
1114 unregister_host1x:
1115         host1x_driver_unregister(&host1x_drm_driver);
1116         return err;
1117 }
1118 module_init(host1x_drm_init);
1119 
1120 static void __exit host1x_drm_exit(void)
1121 {
1122         platform_driver_unregister(&tegra_gr3d_driver);
1123         platform_driver_unregister(&tegra_gr2d_driver);
1124         platform_driver_unregister(&tegra_dpaux_driver);
1125         platform_driver_unregister(&tegra_hdmi_driver);
1126         platform_driver_unregister(&tegra_sor_driver);
1127         platform_driver_unregister(&tegra_dsi_driver);
1128         platform_driver_unregister(&tegra_dc_driver);
1129         host1x_driver_unregister(&host1x_drm_driver);
1130 }
1131 module_exit(host1x_drm_exit);
1132 
1133 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1134 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1135 MODULE_LICENSE("GPL v2");
1136 

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