Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

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_modeset_enables(drm, state);
 60         drm_atomic_helper_commit_planes(drm, state,
 61                                         DRM_PLANE_COMMIT_ACTIVE_ONLY);
 62 
 63         drm_atomic_helper_wait_for_vblanks(drm, state);
 64 
 65         drm_atomic_helper_cleanup_planes(drm, state);
 66         drm_atomic_state_put(state);
 67 }
 68 
 69 static void tegra_atomic_work(struct work_struct *work)
 70 {
 71         struct tegra_drm *tegra = container_of(work, struct tegra_drm,
 72                                                commit.work);
 73 
 74         tegra_atomic_complete(tegra, tegra->commit.state);
 75 }
 76 
 77 static int tegra_atomic_commit(struct drm_device *drm,
 78                                struct drm_atomic_state *state, bool nonblock)
 79 {
 80         struct tegra_drm *tegra = drm->dev_private;
 81         int err;
 82 
 83         err = drm_atomic_helper_prepare_planes(drm, state);
 84         if (err)
 85                 return err;
 86 
 87         /* serialize outstanding nonblocking commits */
 88         mutex_lock(&tegra->commit.lock);
 89         flush_work(&tegra->commit.work);
 90 
 91         /*
 92          * This is the point of no return - everything below never fails except
 93          * when the hw goes bonghits. Which means we can commit the new state on
 94          * the software side now.
 95          */
 96 
 97         drm_atomic_helper_swap_state(state, true);
 98 
 99         drm_atomic_state_get(state);
100         if (nonblock)
101                 tegra_atomic_schedule(tegra, state);
102         else
103                 tegra_atomic_complete(tegra, state);
104 
105         mutex_unlock(&tegra->commit.lock);
106         return 0;
107 }
108 
109 static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
110         .fb_create = tegra_fb_create,
111 #ifdef CONFIG_DRM_FBDEV_EMULATION
112         .output_poll_changed = tegra_fb_output_poll_changed,
113 #endif
114         .atomic_check = drm_atomic_helper_check,
115         .atomic_commit = tegra_atomic_commit,
116 };
117 
118 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
119 {
120         struct host1x_device *device = to_host1x_device(drm->dev);
121         struct tegra_drm *tegra;
122         int err;
123 
124         tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
125         if (!tegra)
126                 return -ENOMEM;
127 
128         if (iommu_present(&platform_bus_type)) {
129                 struct iommu_domain_geometry *geometry;
130                 u64 start, end;
131 
132                 tegra->domain = iommu_domain_alloc(&platform_bus_type);
133                 if (!tegra->domain) {
134                         err = -ENOMEM;
135                         goto free;
136                 }
137 
138                 geometry = &tegra->domain->geometry;
139                 start = geometry->aperture_start;
140                 end = geometry->aperture_end;
141 
142                 DRM_DEBUG_DRIVER("IOMMU aperture initialized (%#llx-%#llx)\n",
143                                  start, end);
144                 drm_mm_init(&tegra->mm, start, end - start + 1);
145         }
146 
147         mutex_init(&tegra->clients_lock);
148         INIT_LIST_HEAD(&tegra->clients);
149 
150         mutex_init(&tegra->commit.lock);
151         INIT_WORK(&tegra->commit.work, tegra_atomic_work);
152 
153         drm->dev_private = tegra;
154         tegra->drm = drm;
155 
156         drm_mode_config_init(drm);
157 
158         drm->mode_config.min_width = 0;
159         drm->mode_config.min_height = 0;
160 
161         drm->mode_config.max_width = 4096;
162         drm->mode_config.max_height = 4096;
163 
164         drm->mode_config.funcs = &tegra_drm_mode_funcs;
165 
166         err = tegra_drm_fb_prepare(drm);
167         if (err < 0)
168                 goto config;
169 
170         drm_kms_helper_poll_init(drm);
171 
172         err = host1x_device_init(device);
173         if (err < 0)
174                 goto fbdev;
175 
176         /*
177          * We don't use the drm_irq_install() helpers provided by the DRM
178          * core, so we need to set this manually in order to allow the
179          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
180          */
181         drm->irq_enabled = true;
182 
183         /* syncpoints are used for full 32-bit hardware VBLANK counters */
184         drm->max_vblank_count = 0xffffffff;
185 
186         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
187         if (err < 0)
188                 goto device;
189 
190         drm_mode_config_reset(drm);
191 
192         err = tegra_drm_fb_init(drm);
193         if (err < 0)
194                 goto vblank;
195 
196         return 0;
197 
198 vblank:
199         drm_vblank_cleanup(drm);
200 device:
201         host1x_device_exit(device);
202 fbdev:
203         drm_kms_helper_poll_fini(drm);
204         tegra_drm_fb_free(drm);
205 config:
206         drm_mode_config_cleanup(drm);
207 
208         if (tegra->domain) {
209                 iommu_domain_free(tegra->domain);
210                 drm_mm_takedown(&tegra->mm);
211         }
212 free:
213         kfree(tegra);
214         return err;
215 }
216 
217 static int tegra_drm_unload(struct drm_device *drm)
218 {
219         struct host1x_device *device = to_host1x_device(drm->dev);
220         struct tegra_drm *tegra = drm->dev_private;
221         int err;
222 
223         drm_kms_helper_poll_fini(drm);
224         tegra_drm_fb_exit(drm);
225         drm_mode_config_cleanup(drm);
226         drm_vblank_cleanup(drm);
227 
228         err = host1x_device_exit(device);
229         if (err < 0)
230                 return err;
231 
232         if (tegra->domain) {
233                 iommu_domain_free(tegra->domain);
234                 drm_mm_takedown(&tegra->mm);
235         }
236 
237         kfree(tegra);
238 
239         return 0;
240 }
241 
242 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
243 {
244         struct tegra_drm_file *fpriv;
245 
246         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
247         if (!fpriv)
248                 return -ENOMEM;
249 
250         INIT_LIST_HEAD(&fpriv->contexts);
251         filp->driver_priv = fpriv;
252 
253         return 0;
254 }
255 
256 static void tegra_drm_context_free(struct tegra_drm_context *context)
257 {
258         context->client->ops->close_channel(context);
259         kfree(context);
260 }
261 
262 static void tegra_drm_lastclose(struct drm_device *drm)
263 {
264 #ifdef CONFIG_DRM_FBDEV_EMULATION
265         struct tegra_drm *tegra = drm->dev_private;
266 
267         tegra_fbdev_restore_mode(tegra->fbdev);
268 #endif
269 }
270 
271 static struct host1x_bo *
272 host1x_bo_lookup(struct drm_file *file, u32 handle)
273 {
274         struct drm_gem_object *gem;
275         struct tegra_bo *bo;
276 
277         gem = drm_gem_object_lookup(file, handle);
278         if (!gem)
279                 return NULL;
280 
281         drm_gem_object_unreference_unlocked(gem);
282 
283         bo = to_tegra_bo(gem);
284         return &bo->base;
285 }
286 
287 static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
288                                        struct drm_tegra_reloc __user *src,
289                                        struct drm_device *drm,
290                                        struct drm_file *file)
291 {
292         u32 cmdbuf, target;
293         int err;
294 
295         err = get_user(cmdbuf, &src->cmdbuf.handle);
296         if (err < 0)
297                 return err;
298 
299         err = get_user(dest->cmdbuf.offset, &src->cmdbuf.offset);
300         if (err < 0)
301                 return err;
302 
303         err = get_user(target, &src->target.handle);
304         if (err < 0)
305                 return err;
306 
307         err = get_user(dest->target.offset, &src->target.offset);
308         if (err < 0)
309                 return err;
310 
311         err = get_user(dest->shift, &src->shift);
312         if (err < 0)
313                 return err;
314 
315         dest->cmdbuf.bo = host1x_bo_lookup(file, cmdbuf);
316         if (!dest->cmdbuf.bo)
317                 return -ENOENT;
318 
319         dest->target.bo = host1x_bo_lookup(file, target);
320         if (!dest->target.bo)
321                 return -ENOENT;
322 
323         return 0;
324 }
325 
326 int tegra_drm_submit(struct tegra_drm_context *context,
327                      struct drm_tegra_submit *args, struct drm_device *drm,
328                      struct drm_file *file)
329 {
330         unsigned int num_cmdbufs = args->num_cmdbufs;
331         unsigned int num_relocs = args->num_relocs;
332         unsigned int num_waitchks = args->num_waitchks;
333         struct drm_tegra_cmdbuf __user *cmdbufs =
334                 (void __user *)(uintptr_t)args->cmdbufs;
335         struct drm_tegra_reloc __user *relocs =
336                 (void __user *)(uintptr_t)args->relocs;
337         struct drm_tegra_waitchk __user *waitchks =
338                 (void __user *)(uintptr_t)args->waitchks;
339         struct drm_tegra_syncpt syncpt;
340         struct host1x_job *job;
341         int err;
342 
343         /* We don't yet support other than one syncpt_incr struct per submit */
344         if (args->num_syncpts != 1)
345                 return -EINVAL;
346 
347         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
348                                args->num_relocs, args->num_waitchks);
349         if (!job)
350                 return -ENOMEM;
351 
352         job->num_relocs = args->num_relocs;
353         job->num_waitchk = args->num_waitchks;
354         job->client = (u32)args->context;
355         job->class = context->client->base.class;
356         job->serialize = true;
357 
358         while (num_cmdbufs) {
359                 struct drm_tegra_cmdbuf cmdbuf;
360                 struct host1x_bo *bo;
361 
362                 if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) {
363                         err = -EFAULT;
364                         goto fail;
365                 }
366 
367                 bo = host1x_bo_lookup(file, cmdbuf.handle);
368                 if (!bo) {
369                         err = -ENOENT;
370                         goto fail;
371                 }
372 
373                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
374                 num_cmdbufs--;
375                 cmdbufs++;
376         }
377 
378         /* copy and resolve relocations from submit */
379         while (num_relocs--) {
380                 err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs],
381                                                   &relocs[num_relocs], drm,
382                                                   file);
383                 if (err < 0)
384                         goto fail;
385         }
386 
387         if (copy_from_user(job->waitchk, waitchks,
388                            sizeof(*waitchks) * num_waitchks)) {
389                 err = -EFAULT;
390                 goto fail;
391         }
392 
393         if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
394                            sizeof(syncpt))) {
395                 err = -EFAULT;
396                 goto fail;
397         }
398 
399         job->is_addr_reg = context->client->ops->is_addr_reg;
400         job->syncpt_incrs = syncpt.incrs;
401         job->syncpt_id = syncpt.id;
402         job->timeout = 10000;
403 
404         if (args->timeout && args->timeout < 10000)
405                 job->timeout = args->timeout;
406 
407         err = host1x_job_pin(job, context->client->base.dev);
408         if (err)
409                 goto fail;
410 
411         err = host1x_job_submit(job);
412         if (err)
413                 goto fail_submit;
414 
415         args->fence = job->syncpt_end;
416 
417         host1x_job_put(job);
418         return 0;
419 
420 fail_submit:
421         host1x_job_unpin(job);
422 fail:
423         host1x_job_put(job);
424         return err;
425 }
426 
427 
428 #ifdef CONFIG_DRM_TEGRA_STAGING
429 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
430 {
431         return (struct tegra_drm_context *)(uintptr_t)context;
432 }
433 
434 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
435                                         struct tegra_drm_context *context)
436 {
437         struct tegra_drm_context *ctx;
438 
439         list_for_each_entry(ctx, &file->contexts, list)
440                 if (ctx == context)
441                         return true;
442 
443         return false;
444 }
445 
446 static int tegra_gem_create(struct drm_device *drm, void *data,
447                             struct drm_file *file)
448 {
449         struct drm_tegra_gem_create *args = data;
450         struct tegra_bo *bo;
451 
452         bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
453                                          &args->handle);
454         if (IS_ERR(bo))
455                 return PTR_ERR(bo);
456 
457         return 0;
458 }
459 
460 static int tegra_gem_mmap(struct drm_device *drm, void *data,
461                           struct drm_file *file)
462 {
463         struct drm_tegra_gem_mmap *args = data;
464         struct drm_gem_object *gem;
465         struct tegra_bo *bo;
466 
467         gem = drm_gem_object_lookup(file, args->handle);
468         if (!gem)
469                 return -EINVAL;
470 
471         bo = to_tegra_bo(gem);
472 
473         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
474 
475         drm_gem_object_unreference_unlocked(gem);
476 
477         return 0;
478 }
479 
480 static int tegra_syncpt_read(struct drm_device *drm, void *data,
481                              struct drm_file *file)
482 {
483         struct host1x *host = dev_get_drvdata(drm->dev->parent);
484         struct drm_tegra_syncpt_read *args = data;
485         struct host1x_syncpt *sp;
486 
487         sp = host1x_syncpt_get(host, args->id);
488         if (!sp)
489                 return -EINVAL;
490 
491         args->value = host1x_syncpt_read_min(sp);
492         return 0;
493 }
494 
495 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
496                              struct drm_file *file)
497 {
498         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
499         struct drm_tegra_syncpt_incr *args = data;
500         struct host1x_syncpt *sp;
501 
502         sp = host1x_syncpt_get(host1x, args->id);
503         if (!sp)
504                 return -EINVAL;
505 
506         return host1x_syncpt_incr(sp);
507 }
508 
509 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
510                              struct drm_file *file)
511 {
512         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
513         struct drm_tegra_syncpt_wait *args = data;
514         struct host1x_syncpt *sp;
515 
516         sp = host1x_syncpt_get(host1x, args->id);
517         if (!sp)
518                 return -EINVAL;
519 
520         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
521                                   &args->value);
522 }
523 
524 static int tegra_open_channel(struct drm_device *drm, void *data,
525                               struct drm_file *file)
526 {
527         struct tegra_drm_file *fpriv = file->driver_priv;
528         struct tegra_drm *tegra = drm->dev_private;
529         struct drm_tegra_open_channel *args = data;
530         struct tegra_drm_context *context;
531         struct tegra_drm_client *client;
532         int err = -ENODEV;
533 
534         context = kzalloc(sizeof(*context), GFP_KERNEL);
535         if (!context)
536                 return -ENOMEM;
537 
538         list_for_each_entry(client, &tegra->clients, list)
539                 if (client->base.class == args->client) {
540                         err = client->ops->open_channel(client, context);
541                         if (err)
542                                 break;
543 
544                         list_add(&context->list, &fpriv->contexts);
545                         args->context = (uintptr_t)context;
546                         context->client = client;
547                         return 0;
548                 }
549 
550         kfree(context);
551         return err;
552 }
553 
554 static int tegra_close_channel(struct drm_device *drm, void *data,
555                                struct drm_file *file)
556 {
557         struct tegra_drm_file *fpriv = file->driver_priv;
558         struct drm_tegra_close_channel *args = data;
559         struct tegra_drm_context *context;
560 
561         context = tegra_drm_get_context(args->context);
562 
563         if (!tegra_drm_file_owns_context(fpriv, context))
564                 return -EINVAL;
565 
566         list_del(&context->list);
567         tegra_drm_context_free(context);
568 
569         return 0;
570 }
571 
572 static int tegra_get_syncpt(struct drm_device *drm, void *data,
573                             struct drm_file *file)
574 {
575         struct tegra_drm_file *fpriv = file->driver_priv;
576         struct drm_tegra_get_syncpt *args = data;
577         struct tegra_drm_context *context;
578         struct host1x_syncpt *syncpt;
579 
580         context = tegra_drm_get_context(args->context);
581 
582         if (!tegra_drm_file_owns_context(fpriv, context))
583                 return -ENODEV;
584 
585         if (args->index >= context->client->base.num_syncpts)
586                 return -EINVAL;
587 
588         syncpt = context->client->base.syncpts[args->index];
589         args->id = host1x_syncpt_id(syncpt);
590 
591         return 0;
592 }
593 
594 static int tegra_submit(struct drm_device *drm, void *data,
595                         struct drm_file *file)
596 {
597         struct tegra_drm_file *fpriv = file->driver_priv;
598         struct drm_tegra_submit *args = data;
599         struct tegra_drm_context *context;
600 
601         context = tegra_drm_get_context(args->context);
602 
603         if (!tegra_drm_file_owns_context(fpriv, context))
604                 return -ENODEV;
605 
606         return context->client->ops->submit(context, args, drm, file);
607 }
608 
609 static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
610                                  struct drm_file *file)
611 {
612         struct tegra_drm_file *fpriv = file->driver_priv;
613         struct drm_tegra_get_syncpt_base *args = data;
614         struct tegra_drm_context *context;
615         struct host1x_syncpt_base *base;
616         struct host1x_syncpt *syncpt;
617 
618         context = tegra_drm_get_context(args->context);
619 
620         if (!tegra_drm_file_owns_context(fpriv, context))
621                 return -ENODEV;
622 
623         if (args->syncpt >= context->client->base.num_syncpts)
624                 return -EINVAL;
625 
626         syncpt = context->client->base.syncpts[args->syncpt];
627 
628         base = host1x_syncpt_get_base(syncpt);
629         if (!base)
630                 return -ENXIO;
631 
632         args->id = host1x_syncpt_base_id(base);
633 
634         return 0;
635 }
636 
637 static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
638                                 struct drm_file *file)
639 {
640         struct drm_tegra_gem_set_tiling *args = data;
641         enum tegra_bo_tiling_mode mode;
642         struct drm_gem_object *gem;
643         unsigned long value = 0;
644         struct tegra_bo *bo;
645 
646         switch (args->mode) {
647         case DRM_TEGRA_GEM_TILING_MODE_PITCH:
648                 mode = TEGRA_BO_TILING_MODE_PITCH;
649 
650                 if (args->value != 0)
651                         return -EINVAL;
652 
653                 break;
654 
655         case DRM_TEGRA_GEM_TILING_MODE_TILED:
656                 mode = TEGRA_BO_TILING_MODE_TILED;
657 
658                 if (args->value != 0)
659                         return -EINVAL;
660 
661                 break;
662 
663         case DRM_TEGRA_GEM_TILING_MODE_BLOCK:
664                 mode = TEGRA_BO_TILING_MODE_BLOCK;
665 
666                 if (args->value > 5)
667                         return -EINVAL;
668 
669                 value = args->value;
670                 break;
671 
672         default:
673                 return -EINVAL;
674         }
675 
676         gem = drm_gem_object_lookup(file, args->handle);
677         if (!gem)
678                 return -ENOENT;
679 
680         bo = to_tegra_bo(gem);
681 
682         bo->tiling.mode = mode;
683         bo->tiling.value = value;
684 
685         drm_gem_object_unreference_unlocked(gem);
686 
687         return 0;
688 }
689 
690 static int tegra_gem_get_tiling(struct drm_device *drm, void *data,
691                                 struct drm_file *file)
692 {
693         struct drm_tegra_gem_get_tiling *args = data;
694         struct drm_gem_object *gem;
695         struct tegra_bo *bo;
696         int err = 0;
697 
698         gem = drm_gem_object_lookup(file, args->handle);
699         if (!gem)
700                 return -ENOENT;
701 
702         bo = to_tegra_bo(gem);
703 
704         switch (bo->tiling.mode) {
705         case TEGRA_BO_TILING_MODE_PITCH:
706                 args->mode = DRM_TEGRA_GEM_TILING_MODE_PITCH;
707                 args->value = 0;
708                 break;
709 
710         case TEGRA_BO_TILING_MODE_TILED:
711                 args->mode = DRM_TEGRA_GEM_TILING_MODE_TILED;
712                 args->value = 0;
713                 break;
714 
715         case TEGRA_BO_TILING_MODE_BLOCK:
716                 args->mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK;
717                 args->value = bo->tiling.value;
718                 break;
719 
720         default:
721                 err = -EINVAL;
722                 break;
723         }
724 
725         drm_gem_object_unreference_unlocked(gem);
726 
727         return err;
728 }
729 
730 static int tegra_gem_set_flags(struct drm_device *drm, void *data,
731                                struct drm_file *file)
732 {
733         struct drm_tegra_gem_set_flags *args = data;
734         struct drm_gem_object *gem;
735         struct tegra_bo *bo;
736 
737         if (args->flags & ~DRM_TEGRA_GEM_FLAGS)
738                 return -EINVAL;
739 
740         gem = drm_gem_object_lookup(file, args->handle);
741         if (!gem)
742                 return -ENOENT;
743 
744         bo = to_tegra_bo(gem);
745         bo->flags = 0;
746 
747         if (args->flags & DRM_TEGRA_GEM_BOTTOM_UP)
748                 bo->flags |= TEGRA_BO_BOTTOM_UP;
749 
750         drm_gem_object_unreference_unlocked(gem);
751 
752         return 0;
753 }
754 
755 static int tegra_gem_get_flags(struct drm_device *drm, void *data,
756                                struct drm_file *file)
757 {
758         struct drm_tegra_gem_get_flags *args = data;
759         struct drm_gem_object *gem;
760         struct tegra_bo *bo;
761 
762         gem = drm_gem_object_lookup(file, args->handle);
763         if (!gem)
764                 return -ENOENT;
765 
766         bo = to_tegra_bo(gem);
767         args->flags = 0;
768 
769         if (bo->flags & TEGRA_BO_BOTTOM_UP)
770                 args->flags |= DRM_TEGRA_GEM_BOTTOM_UP;
771 
772         drm_gem_object_unreference_unlocked(gem);
773 
774         return 0;
775 }
776 #endif
777 
778 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
779 #ifdef CONFIG_DRM_TEGRA_STAGING
780         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, 0),
781         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, 0),
782         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, 0),
783         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, 0),
784         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, 0),
785         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, 0),
786         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, 0),
787         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, 0),
788         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, 0),
789         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, 0),
790         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_TILING, tegra_gem_set_tiling, 0),
791         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_TILING, tegra_gem_get_tiling, 0),
792         DRM_IOCTL_DEF_DRV(TEGRA_GEM_SET_FLAGS, tegra_gem_set_flags, 0),
793         DRM_IOCTL_DEF_DRV(TEGRA_GEM_GET_FLAGS, tegra_gem_get_flags, 0),
794 #endif
795 };
796 
797 static const struct file_operations tegra_drm_fops = {
798         .owner = THIS_MODULE,
799         .open = drm_open,
800         .release = drm_release,
801         .unlocked_ioctl = drm_ioctl,
802         .mmap = tegra_drm_mmap,
803         .poll = drm_poll,
804         .read = drm_read,
805         .compat_ioctl = drm_compat_ioctl,
806         .llseek = noop_llseek,
807 };
808 
809 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm,
810                                              unsigned int pipe)
811 {
812         struct drm_crtc *crtc;
813 
814         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
815                 if (pipe == drm_crtc_index(crtc))
816                         return crtc;
817         }
818 
819         return NULL;
820 }
821 
822 static u32 tegra_drm_get_vblank_counter(struct drm_device *drm,
823                                         unsigned int pipe)
824 {
825         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
826         struct tegra_dc *dc = to_tegra_dc(crtc);
827 
828         if (!crtc)
829                 return 0;
830 
831         return tegra_dc_get_vblank_counter(dc);
832 }
833 
834 static int tegra_drm_enable_vblank(struct drm_device *drm, unsigned int pipe)
835 {
836         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
837         struct tegra_dc *dc = to_tegra_dc(crtc);
838 
839         if (!crtc)
840                 return -ENODEV;
841 
842         tegra_dc_enable_vblank(dc);
843 
844         return 0;
845 }
846 
847 static void tegra_drm_disable_vblank(struct drm_device *drm, unsigned int pipe)
848 {
849         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
850         struct tegra_dc *dc = to_tegra_dc(crtc);
851 
852         if (crtc)
853                 tegra_dc_disable_vblank(dc);
854 }
855 
856 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
857 {
858         struct tegra_drm_file *fpriv = file->driver_priv;
859         struct tegra_drm_context *context, *tmp;
860 
861         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
862                 tegra_drm_context_free(context);
863 
864         kfree(fpriv);
865 }
866 
867 #ifdef CONFIG_DEBUG_FS
868 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
869 {
870         struct drm_info_node *node = (struct drm_info_node *)s->private;
871         struct drm_device *drm = node->minor->dev;
872         struct drm_framebuffer *fb;
873 
874         mutex_lock(&drm->mode_config.fb_lock);
875 
876         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
877                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
878                            fb->base.id, fb->width, fb->height, fb->depth,
879                            fb->bits_per_pixel,
880                            drm_framebuffer_read_refcount(fb));
881         }
882 
883         mutex_unlock(&drm->mode_config.fb_lock);
884 
885         return 0;
886 }
887 
888 static int tegra_debugfs_iova(struct seq_file *s, void *data)
889 {
890         struct drm_info_node *node = (struct drm_info_node *)s->private;
891         struct drm_device *drm = node->minor->dev;
892         struct tegra_drm *tegra = drm->dev_private;
893 
894         return drm_mm_dump_table(s, &tegra->mm);
895 }
896 
897 static struct drm_info_list tegra_debugfs_list[] = {
898         { "framebuffers", tegra_debugfs_framebuffers, 0 },
899         { "iova", tegra_debugfs_iova, 0 },
900 };
901 
902 static int tegra_debugfs_init(struct drm_minor *minor)
903 {
904         return drm_debugfs_create_files(tegra_debugfs_list,
905                                         ARRAY_SIZE(tegra_debugfs_list),
906                                         minor->debugfs_root, minor);
907 }
908 
909 static void tegra_debugfs_cleanup(struct drm_minor *minor)
910 {
911         drm_debugfs_remove_files(tegra_debugfs_list,
912                                  ARRAY_SIZE(tegra_debugfs_list), minor);
913 }
914 #endif
915 
916 static struct drm_driver tegra_drm_driver = {
917         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
918                            DRIVER_ATOMIC,
919         .load = tegra_drm_load,
920         .unload = tegra_drm_unload,
921         .open = tegra_drm_open,
922         .preclose = tegra_drm_preclose,
923         .lastclose = tegra_drm_lastclose,
924 
925         .get_vblank_counter = tegra_drm_get_vblank_counter,
926         .enable_vblank = tegra_drm_enable_vblank,
927         .disable_vblank = tegra_drm_disable_vblank,
928 
929 #if defined(CONFIG_DEBUG_FS)
930         .debugfs_init = tegra_debugfs_init,
931         .debugfs_cleanup = tegra_debugfs_cleanup,
932 #endif
933 
934         .gem_free_object_unlocked = tegra_bo_free_object,
935         .gem_vm_ops = &tegra_bo_vm_ops,
936 
937         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
938         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
939         .gem_prime_export = tegra_gem_prime_export,
940         .gem_prime_import = tegra_gem_prime_import,
941 
942         .dumb_create = tegra_bo_dumb_create,
943         .dumb_map_offset = tegra_bo_dumb_map_offset,
944         .dumb_destroy = drm_gem_dumb_destroy,
945 
946         .ioctls = tegra_drm_ioctls,
947         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
948         .fops = &tegra_drm_fops,
949 
950         .name = DRIVER_NAME,
951         .desc = DRIVER_DESC,
952         .date = DRIVER_DATE,
953         .major = DRIVER_MAJOR,
954         .minor = DRIVER_MINOR,
955         .patchlevel = DRIVER_PATCHLEVEL,
956 };
957 
958 int tegra_drm_register_client(struct tegra_drm *tegra,
959                               struct tegra_drm_client *client)
960 {
961         mutex_lock(&tegra->clients_lock);
962         list_add_tail(&client->list, &tegra->clients);
963         mutex_unlock(&tegra->clients_lock);
964 
965         return 0;
966 }
967 
968 int tegra_drm_unregister_client(struct tegra_drm *tegra,
969                                 struct tegra_drm_client *client)
970 {
971         mutex_lock(&tegra->clients_lock);
972         list_del_init(&client->list);
973         mutex_unlock(&tegra->clients_lock);
974 
975         return 0;
976 }
977 
978 static int host1x_drm_probe(struct host1x_device *dev)
979 {
980         struct drm_driver *driver = &tegra_drm_driver;
981         struct drm_device *drm;
982         int err;
983 
984         drm = drm_dev_alloc(driver, &dev->dev);
985         if (IS_ERR(drm))
986                 return PTR_ERR(drm);
987 
988         dev_set_drvdata(&dev->dev, drm);
989 
990         err = drm_dev_register(drm, 0);
991         if (err < 0)
992                 goto unref;
993 
994         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
995                  driver->major, driver->minor, driver->patchlevel,
996                  driver->date, drm->primary->index);
997 
998         return 0;
999 
1000 unref:
1001         drm_dev_unref(drm);
1002         return err;
1003 }
1004 
1005 static int host1x_drm_remove(struct host1x_device *dev)
1006 {
1007         struct drm_device *drm = dev_get_drvdata(&dev->dev);
1008 
1009         drm_dev_unregister(drm);
1010         drm_dev_unref(drm);
1011 
1012         return 0;
1013 }
1014 
1015 #ifdef CONFIG_PM_SLEEP
1016 static int host1x_drm_suspend(struct device *dev)
1017 {
1018         struct drm_device *drm = dev_get_drvdata(dev);
1019         struct tegra_drm *tegra = drm->dev_private;
1020 
1021         drm_kms_helper_poll_disable(drm);
1022         tegra_drm_fb_suspend(drm);
1023 
1024         tegra->state = drm_atomic_helper_suspend(drm);
1025         if (IS_ERR(tegra->state)) {
1026                 tegra_drm_fb_resume(drm);
1027                 drm_kms_helper_poll_enable(drm);
1028                 return PTR_ERR(tegra->state);
1029         }
1030 
1031         return 0;
1032 }
1033 
1034 static int host1x_drm_resume(struct device *dev)
1035 {
1036         struct drm_device *drm = dev_get_drvdata(dev);
1037         struct tegra_drm *tegra = drm->dev_private;
1038 
1039         drm_atomic_helper_resume(drm, tegra->state);
1040         tegra_drm_fb_resume(drm);
1041         drm_kms_helper_poll_enable(drm);
1042 
1043         return 0;
1044 }
1045 #endif
1046 
1047 static SIMPLE_DEV_PM_OPS(host1x_drm_pm_ops, host1x_drm_suspend,
1048                          host1x_drm_resume);
1049 
1050 static const struct of_device_id host1x_drm_subdevs[] = {
1051         { .compatible = "nvidia,tegra20-dc", },
1052         { .compatible = "nvidia,tegra20-hdmi", },
1053         { .compatible = "nvidia,tegra20-gr2d", },
1054         { .compatible = "nvidia,tegra20-gr3d", },
1055         { .compatible = "nvidia,tegra30-dc", },
1056         { .compatible = "nvidia,tegra30-hdmi", },
1057         { .compatible = "nvidia,tegra30-gr2d", },
1058         { .compatible = "nvidia,tegra30-gr3d", },
1059         { .compatible = "nvidia,tegra114-dsi", },
1060         { .compatible = "nvidia,tegra114-hdmi", },
1061         { .compatible = "nvidia,tegra114-gr3d", },
1062         { .compatible = "nvidia,tegra124-dc", },
1063         { .compatible = "nvidia,tegra124-sor", },
1064         { .compatible = "nvidia,tegra124-hdmi", },
1065         { .compatible = "nvidia,tegra124-dsi", },
1066         { .compatible = "nvidia,tegra132-dsi", },
1067         { .compatible = "nvidia,tegra210-dc", },
1068         { .compatible = "nvidia,tegra210-dsi", },
1069         { .compatible = "nvidia,tegra210-sor", },
1070         { .compatible = "nvidia,tegra210-sor1", },
1071         { /* sentinel */ }
1072 };
1073 
1074 static struct host1x_driver host1x_drm_driver = {
1075         .driver = {
1076                 .name = "drm",
1077                 .pm = &host1x_drm_pm_ops,
1078         },
1079         .probe = host1x_drm_probe,
1080         .remove = host1x_drm_remove,
1081         .subdevs = host1x_drm_subdevs,
1082 };
1083 
1084 static struct platform_driver * const drivers[] = {
1085         &tegra_dc_driver,
1086         &tegra_hdmi_driver,
1087         &tegra_dsi_driver,
1088         &tegra_dpaux_driver,
1089         &tegra_sor_driver,
1090         &tegra_gr2d_driver,
1091         &tegra_gr3d_driver,
1092 };
1093 
1094 static int __init host1x_drm_init(void)
1095 {
1096         int err;
1097 
1098         err = host1x_driver_register(&host1x_drm_driver);
1099         if (err < 0)
1100                 return err;
1101 
1102         err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1103         if (err < 0)
1104                 goto unregister_host1x;
1105 
1106         return 0;
1107 
1108 unregister_host1x:
1109         host1x_driver_unregister(&host1x_drm_driver);
1110         return err;
1111 }
1112 module_init(host1x_drm_init);
1113 
1114 static void __exit host1x_drm_exit(void)
1115 {
1116         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1117         host1x_driver_unregister(&host1x_drm_driver);
1118 }
1119 module_exit(host1x_drm_exit);
1120 
1121 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
1122 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
1123 MODULE_LICENSE("GPL v2");
1124 

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