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Revert "drm/etnaviv: export client GPU usage statistics via fdinfo"
[tomoyo/tomoyo-test1.git] / drivers / gpu / drm / etnaviv / etnaviv_drv.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2015-2018 Etnaviv Project
4  */
5
6 #include <linux/component.h>
7 #include <linux/dma-mapping.h>
8 #include <linux/module.h>
9 #include <linux/of_platform.h>
10 #include <linux/uaccess.h>
11
12 #include <drm/drm_debugfs.h>
13 #include <drm/drm_drv.h>
14 #include <drm/drm_file.h>
15 #include <drm/drm_ioctl.h>
16 #include <drm/drm_of.h>
17 #include <drm/drm_prime.h>
18
19 #include "etnaviv_cmdbuf.h"
20 #include "etnaviv_drv.h"
21 #include "etnaviv_gpu.h"
22 #include "etnaviv_gem.h"
23 #include "etnaviv_mmu.h"
24 #include "etnaviv_perfmon.h"
25
26 /*
27  * DRM operations:
28  */
29
30
31 static void load_gpu(struct drm_device *dev)
32 {
33         struct etnaviv_drm_private *priv = dev->dev_private;
34         unsigned int i;
35
36         for (i = 0; i < ETNA_MAX_PIPES; i++) {
37                 struct etnaviv_gpu *g = priv->gpu[i];
38
39                 if (g) {
40                         int ret;
41
42                         ret = etnaviv_gpu_init(g);
43                         if (ret)
44                                 priv->gpu[i] = NULL;
45                 }
46         }
47 }
48
49 static int etnaviv_open(struct drm_device *dev, struct drm_file *file)
50 {
51         struct etnaviv_drm_private *priv = dev->dev_private;
52         struct etnaviv_file_private *ctx;
53         int ret, i;
54
55         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
56         if (!ctx)
57                 return -ENOMEM;
58
59         ret = xa_alloc_cyclic(&priv->active_contexts, &ctx->id, ctx,
60                               xa_limit_32b, &priv->next_context_id, GFP_KERNEL);
61         if (ret < 0)
62                 goto out_free;
63
64         ctx->mmu = etnaviv_iommu_context_init(priv->mmu_global,
65                                               priv->cmdbuf_suballoc);
66         if (!ctx->mmu) {
67                 ret = -ENOMEM;
68                 goto out_free;
69         }
70
71         for (i = 0; i < ETNA_MAX_PIPES; i++) {
72                 struct etnaviv_gpu *gpu = priv->gpu[i];
73                 struct drm_gpu_scheduler *sched;
74
75                 if (gpu) {
76                         sched = &gpu->sched;
77                         drm_sched_entity_init(&ctx->sched_entity[i],
78                                               DRM_SCHED_PRIORITY_NORMAL, &sched,
79                                               1, NULL);
80                         }
81         }
82
83         file->driver_priv = ctx;
84
85         return 0;
86
87 out_free:
88         kfree(ctx);
89         return ret;
90 }
91
92 static void etnaviv_postclose(struct drm_device *dev, struct drm_file *file)
93 {
94         struct etnaviv_drm_private *priv = dev->dev_private;
95         struct etnaviv_file_private *ctx = file->driver_priv;
96         unsigned int i;
97
98         for (i = 0; i < ETNA_MAX_PIPES; i++) {
99                 struct etnaviv_gpu *gpu = priv->gpu[i];
100
101                 if (gpu)
102                         drm_sched_entity_destroy(&ctx->sched_entity[i]);
103         }
104
105         etnaviv_iommu_context_put(ctx->mmu);
106
107         xa_erase(&priv->active_contexts, ctx->id);
108
109         kfree(ctx);
110 }
111
112 /*
113  * DRM debugfs:
114  */
115
116 #ifdef CONFIG_DEBUG_FS
117 static int etnaviv_gem_show(struct drm_device *dev, struct seq_file *m)
118 {
119         struct etnaviv_drm_private *priv = dev->dev_private;
120
121         etnaviv_gem_describe_objects(priv, m);
122
123         return 0;
124 }
125
126 static int etnaviv_mm_show(struct drm_device *dev, struct seq_file *m)
127 {
128         struct drm_printer p = drm_seq_file_printer(m);
129
130         read_lock(&dev->vma_offset_manager->vm_lock);
131         drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
132         read_unlock(&dev->vma_offset_manager->vm_lock);
133
134         return 0;
135 }
136
137 static int etnaviv_mmu_show(struct etnaviv_gpu *gpu, struct seq_file *m)
138 {
139         struct drm_printer p = drm_seq_file_printer(m);
140         struct etnaviv_iommu_context *mmu_context;
141
142         seq_printf(m, "Active Objects (%s):\n", dev_name(gpu->dev));
143
144         /*
145          * Lock the GPU to avoid a MMU context switch just now and elevate
146          * the refcount of the current context to avoid it disappearing from
147          * under our feet.
148          */
149         mutex_lock(&gpu->lock);
150         mmu_context = gpu->mmu_context;
151         if (mmu_context)
152                 etnaviv_iommu_context_get(mmu_context);
153         mutex_unlock(&gpu->lock);
154
155         if (!mmu_context)
156                 return 0;
157
158         mutex_lock(&mmu_context->lock);
159         drm_mm_print(&mmu_context->mm, &p);
160         mutex_unlock(&mmu_context->lock);
161
162         etnaviv_iommu_context_put(mmu_context);
163
164         return 0;
165 }
166
167 static void etnaviv_buffer_dump(struct etnaviv_gpu *gpu, struct seq_file *m)
168 {
169         struct etnaviv_cmdbuf *buf = &gpu->buffer;
170         u32 size = buf->size;
171         u32 *ptr = buf->vaddr;
172         u32 i;
173
174         seq_printf(m, "virt %p - phys 0x%llx - free 0x%08x\n",
175                         buf->vaddr, (u64)etnaviv_cmdbuf_get_pa(buf),
176                         size - buf->user_size);
177
178         for (i = 0; i < size / 4; i++) {
179                 if (i && !(i % 4))
180                         seq_puts(m, "\n");
181                 if (i % 4 == 0)
182                         seq_printf(m, "\t0x%p: ", ptr + i);
183                 seq_printf(m, "%08x ", *(ptr + i));
184         }
185         seq_puts(m, "\n");
186 }
187
188 static int etnaviv_ring_show(struct etnaviv_gpu *gpu, struct seq_file *m)
189 {
190         seq_printf(m, "Ring Buffer (%s): ", dev_name(gpu->dev));
191
192         mutex_lock(&gpu->lock);
193         etnaviv_buffer_dump(gpu, m);
194         mutex_unlock(&gpu->lock);
195
196         return 0;
197 }
198
199 static int show_unlocked(struct seq_file *m, void *arg)
200 {
201         struct drm_info_node *node = (struct drm_info_node *) m->private;
202         struct drm_device *dev = node->minor->dev;
203         int (*show)(struct drm_device *dev, struct seq_file *m) =
204                         node->info_ent->data;
205
206         return show(dev, m);
207 }
208
209 static int show_each_gpu(struct seq_file *m, void *arg)
210 {
211         struct drm_info_node *node = (struct drm_info_node *) m->private;
212         struct drm_device *dev = node->minor->dev;
213         struct etnaviv_drm_private *priv = dev->dev_private;
214         struct etnaviv_gpu *gpu;
215         int (*show)(struct etnaviv_gpu *gpu, struct seq_file *m) =
216                         node->info_ent->data;
217         unsigned int i;
218         int ret = 0;
219
220         for (i = 0; i < ETNA_MAX_PIPES; i++) {
221                 gpu = priv->gpu[i];
222                 if (!gpu)
223                         continue;
224
225                 ret = show(gpu, m);
226                 if (ret < 0)
227                         break;
228         }
229
230         return ret;
231 }
232
233 static struct drm_info_list etnaviv_debugfs_list[] = {
234                 {"gpu", show_each_gpu, 0, etnaviv_gpu_debugfs},
235                 {"gem", show_unlocked, 0, etnaviv_gem_show},
236                 { "mm", show_unlocked, 0, etnaviv_mm_show },
237                 {"mmu", show_each_gpu, 0, etnaviv_mmu_show},
238                 {"ring", show_each_gpu, 0, etnaviv_ring_show},
239 };
240
241 static void etnaviv_debugfs_init(struct drm_minor *minor)
242 {
243         drm_debugfs_create_files(etnaviv_debugfs_list,
244                                  ARRAY_SIZE(etnaviv_debugfs_list),
245                                  minor->debugfs_root, minor);
246 }
247 #endif
248
249 /*
250  * DRM ioctls:
251  */
252
253 static int etnaviv_ioctl_get_param(struct drm_device *dev, void *data,
254                 struct drm_file *file)
255 {
256         struct etnaviv_drm_private *priv = dev->dev_private;
257         struct drm_etnaviv_param *args = data;
258         struct etnaviv_gpu *gpu;
259
260         if (args->pipe >= ETNA_MAX_PIPES)
261                 return -EINVAL;
262
263         gpu = priv->gpu[args->pipe];
264         if (!gpu)
265                 return -ENXIO;
266
267         return etnaviv_gpu_get_param(gpu, args->param, &args->value);
268 }
269
270 static int etnaviv_ioctl_gem_new(struct drm_device *dev, void *data,
271                 struct drm_file *file)
272 {
273         struct drm_etnaviv_gem_new *args = data;
274
275         if (args->flags & ~(ETNA_BO_CACHED | ETNA_BO_WC | ETNA_BO_UNCACHED |
276                             ETNA_BO_FORCE_MMU))
277                 return -EINVAL;
278
279         return etnaviv_gem_new_handle(dev, file, args->size,
280                         args->flags, &args->handle);
281 }
282
283 static int etnaviv_ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
284                 struct drm_file *file)
285 {
286         struct drm_etnaviv_gem_cpu_prep *args = data;
287         struct drm_gem_object *obj;
288         int ret;
289
290         if (args->op & ~(ETNA_PREP_READ | ETNA_PREP_WRITE | ETNA_PREP_NOSYNC))
291                 return -EINVAL;
292
293         obj = drm_gem_object_lookup(file, args->handle);
294         if (!obj)
295                 return -ENOENT;
296
297         ret = etnaviv_gem_cpu_prep(obj, args->op, &args->timeout);
298
299         drm_gem_object_put(obj);
300
301         return ret;
302 }
303
304 static int etnaviv_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
305                 struct drm_file *file)
306 {
307         struct drm_etnaviv_gem_cpu_fini *args = data;
308         struct drm_gem_object *obj;
309         int ret;
310
311         if (args->flags)
312                 return -EINVAL;
313
314         obj = drm_gem_object_lookup(file, args->handle);
315         if (!obj)
316                 return -ENOENT;
317
318         ret = etnaviv_gem_cpu_fini(obj);
319
320         drm_gem_object_put(obj);
321
322         return ret;
323 }
324
325 static int etnaviv_ioctl_gem_info(struct drm_device *dev, void *data,
326                 struct drm_file *file)
327 {
328         struct drm_etnaviv_gem_info *args = data;
329         struct drm_gem_object *obj;
330         int ret;
331
332         if (args->pad)
333                 return -EINVAL;
334
335         obj = drm_gem_object_lookup(file, args->handle);
336         if (!obj)
337                 return -ENOENT;
338
339         ret = etnaviv_gem_mmap_offset(obj, &args->offset);
340         drm_gem_object_put(obj);
341
342         return ret;
343 }
344
345 static int etnaviv_ioctl_wait_fence(struct drm_device *dev, void *data,
346                 struct drm_file *file)
347 {
348         struct drm_etnaviv_wait_fence *args = data;
349         struct etnaviv_drm_private *priv = dev->dev_private;
350         struct drm_etnaviv_timespec *timeout = &args->timeout;
351         struct etnaviv_gpu *gpu;
352
353         if (args->flags & ~(ETNA_WAIT_NONBLOCK))
354                 return -EINVAL;
355
356         if (args->pipe >= ETNA_MAX_PIPES)
357                 return -EINVAL;
358
359         gpu = priv->gpu[args->pipe];
360         if (!gpu)
361                 return -ENXIO;
362
363         if (args->flags & ETNA_WAIT_NONBLOCK)
364                 timeout = NULL;
365
366         return etnaviv_gpu_wait_fence_interruptible(gpu, args->fence,
367                                                     timeout);
368 }
369
370 static int etnaviv_ioctl_gem_userptr(struct drm_device *dev, void *data,
371         struct drm_file *file)
372 {
373         struct drm_etnaviv_gem_userptr *args = data;
374
375         if (args->flags & ~(ETNA_USERPTR_READ|ETNA_USERPTR_WRITE) ||
376             args->flags == 0)
377                 return -EINVAL;
378
379         if (offset_in_page(args->user_ptr | args->user_size) ||
380             (uintptr_t)args->user_ptr != args->user_ptr ||
381             (u32)args->user_size != args->user_size ||
382             args->user_ptr & ~PAGE_MASK)
383                 return -EINVAL;
384
385         if (!access_ok((void __user *)(unsigned long)args->user_ptr,
386                        args->user_size))
387                 return -EFAULT;
388
389         return etnaviv_gem_new_userptr(dev, file, args->user_ptr,
390                                        args->user_size, args->flags,
391                                        &args->handle);
392 }
393
394 static int etnaviv_ioctl_gem_wait(struct drm_device *dev, void *data,
395         struct drm_file *file)
396 {
397         struct etnaviv_drm_private *priv = dev->dev_private;
398         struct drm_etnaviv_gem_wait *args = data;
399         struct drm_etnaviv_timespec *timeout = &args->timeout;
400         struct drm_gem_object *obj;
401         struct etnaviv_gpu *gpu;
402         int ret;
403
404         if (args->flags & ~(ETNA_WAIT_NONBLOCK))
405                 return -EINVAL;
406
407         if (args->pipe >= ETNA_MAX_PIPES)
408                 return -EINVAL;
409
410         gpu = priv->gpu[args->pipe];
411         if (!gpu)
412                 return -ENXIO;
413
414         obj = drm_gem_object_lookup(file, args->handle);
415         if (!obj)
416                 return -ENOENT;
417
418         if (args->flags & ETNA_WAIT_NONBLOCK)
419                 timeout = NULL;
420
421         ret = etnaviv_gem_wait_bo(gpu, obj, timeout);
422
423         drm_gem_object_put(obj);
424
425         return ret;
426 }
427
428 static int etnaviv_ioctl_pm_query_dom(struct drm_device *dev, void *data,
429         struct drm_file *file)
430 {
431         struct etnaviv_drm_private *priv = dev->dev_private;
432         struct drm_etnaviv_pm_domain *args = data;
433         struct etnaviv_gpu *gpu;
434
435         if (args->pipe >= ETNA_MAX_PIPES)
436                 return -EINVAL;
437
438         gpu = priv->gpu[args->pipe];
439         if (!gpu)
440                 return -ENXIO;
441
442         return etnaviv_pm_query_dom(gpu, args);
443 }
444
445 static int etnaviv_ioctl_pm_query_sig(struct drm_device *dev, void *data,
446         struct drm_file *file)
447 {
448         struct etnaviv_drm_private *priv = dev->dev_private;
449         struct drm_etnaviv_pm_signal *args = data;
450         struct etnaviv_gpu *gpu;
451
452         if (args->pipe >= ETNA_MAX_PIPES)
453                 return -EINVAL;
454
455         gpu = priv->gpu[args->pipe];
456         if (!gpu)
457                 return -ENXIO;
458
459         return etnaviv_pm_query_sig(gpu, args);
460 }
461
462 static const struct drm_ioctl_desc etnaviv_ioctls[] = {
463 #define ETNA_IOCTL(n, func, flags) \
464         DRM_IOCTL_DEF_DRV(ETNAVIV_##n, etnaviv_ioctl_##func, flags)
465         ETNA_IOCTL(GET_PARAM,    get_param,    DRM_RENDER_ALLOW),
466         ETNA_IOCTL(GEM_NEW,      gem_new,      DRM_RENDER_ALLOW),
467         ETNA_IOCTL(GEM_INFO,     gem_info,     DRM_RENDER_ALLOW),
468         ETNA_IOCTL(GEM_CPU_PREP, gem_cpu_prep, DRM_RENDER_ALLOW),
469         ETNA_IOCTL(GEM_CPU_FINI, gem_cpu_fini, DRM_RENDER_ALLOW),
470         ETNA_IOCTL(GEM_SUBMIT,   gem_submit,   DRM_RENDER_ALLOW),
471         ETNA_IOCTL(WAIT_FENCE,   wait_fence,   DRM_RENDER_ALLOW),
472         ETNA_IOCTL(GEM_USERPTR,  gem_userptr,  DRM_RENDER_ALLOW),
473         ETNA_IOCTL(GEM_WAIT,     gem_wait,     DRM_RENDER_ALLOW),
474         ETNA_IOCTL(PM_QUERY_DOM, pm_query_dom, DRM_RENDER_ALLOW),
475         ETNA_IOCTL(PM_QUERY_SIG, pm_query_sig, DRM_RENDER_ALLOW),
476 };
477
478 DEFINE_DRM_GEM_FOPS(fops);
479
480 static const struct drm_driver etnaviv_drm_driver = {
481         .driver_features    = DRIVER_GEM | DRIVER_RENDER,
482         .open               = etnaviv_open,
483         .postclose           = etnaviv_postclose,
484         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
485         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
486         .gem_prime_import_sg_table = etnaviv_gem_prime_import_sg_table,
487         .gem_prime_mmap     = drm_gem_prime_mmap,
488 #ifdef CONFIG_DEBUG_FS
489         .debugfs_init       = etnaviv_debugfs_init,
490 #endif
491         .ioctls             = etnaviv_ioctls,
492         .num_ioctls         = DRM_ETNAVIV_NUM_IOCTLS,
493         .fops               = &fops,
494         .name               = "etnaviv",
495         .desc               = "etnaviv DRM",
496         .date               = "20151214",
497         .major              = 1,
498         .minor              = 3,
499 };
500
501 /*
502  * Platform driver:
503  */
504 static int etnaviv_bind(struct device *dev)
505 {
506         struct etnaviv_drm_private *priv;
507         struct drm_device *drm;
508         int ret;
509
510         drm = drm_dev_alloc(&etnaviv_drm_driver, dev);
511         if (IS_ERR(drm))
512                 return PTR_ERR(drm);
513
514         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
515         if (!priv) {
516                 dev_err(dev, "failed to allocate private data\n");
517                 ret = -ENOMEM;
518                 goto out_put;
519         }
520         drm->dev_private = priv;
521
522         dma_set_max_seg_size(dev, SZ_2G);
523
524         xa_init_flags(&priv->active_contexts, XA_FLAGS_ALLOC);
525
526         mutex_init(&priv->gem_lock);
527         INIT_LIST_HEAD(&priv->gem_list);
528         priv->num_gpus = 0;
529         priv->shm_gfp_mask = GFP_HIGHUSER | __GFP_RETRY_MAYFAIL | __GFP_NOWARN;
530
531         priv->cmdbuf_suballoc = etnaviv_cmdbuf_suballoc_new(drm->dev);
532         if (IS_ERR(priv->cmdbuf_suballoc)) {
533                 dev_err(drm->dev, "Failed to create cmdbuf suballocator\n");
534                 ret = PTR_ERR(priv->cmdbuf_suballoc);
535                 goto out_free_priv;
536         }
537
538         dev_set_drvdata(dev, drm);
539
540         ret = component_bind_all(dev, drm);
541         if (ret < 0)
542                 goto out_destroy_suballoc;
543
544         load_gpu(drm);
545
546         ret = drm_dev_register(drm, 0);
547         if (ret)
548                 goto out_unbind;
549
550         return 0;
551
552 out_unbind:
553         component_unbind_all(dev, drm);
554 out_destroy_suballoc:
555         etnaviv_cmdbuf_suballoc_destroy(priv->cmdbuf_suballoc);
556 out_free_priv:
557         kfree(priv);
558 out_put:
559         drm_dev_put(drm);
560
561         return ret;
562 }
563
564 static void etnaviv_unbind(struct device *dev)
565 {
566         struct drm_device *drm = dev_get_drvdata(dev);
567         struct etnaviv_drm_private *priv = drm->dev_private;
568
569         drm_dev_unregister(drm);
570
571         component_unbind_all(dev, drm);
572
573         etnaviv_cmdbuf_suballoc_destroy(priv->cmdbuf_suballoc);
574
575         xa_destroy(&priv->active_contexts);
576
577         drm->dev_private = NULL;
578         kfree(priv);
579
580         drm_dev_put(drm);
581 }
582
583 static const struct component_master_ops etnaviv_master_ops = {
584         .bind = etnaviv_bind,
585         .unbind = etnaviv_unbind,
586 };
587
588 static int etnaviv_pdev_probe(struct platform_device *pdev)
589 {
590         struct device *dev = &pdev->dev;
591         struct device_node *first_node = NULL;
592         struct component_match *match = NULL;
593
594         if (!dev->platform_data) {
595                 struct device_node *core_node;
596
597                 for_each_compatible_node(core_node, NULL, "vivante,gc") {
598                         if (!of_device_is_available(core_node))
599                                 continue;
600
601                         if (!first_node)
602                                 first_node = core_node;
603
604                         drm_of_component_match_add(&pdev->dev, &match,
605                                                    component_compare_of, core_node);
606                 }
607         } else {
608                 char **names = dev->platform_data;
609                 unsigned i;
610
611                 for (i = 0; names[i]; i++)
612                         component_match_add(dev, &match, component_compare_dev_name, names[i]);
613         }
614
615         /*
616          * PTA and MTLB can have 40 bit base addresses, but
617          * unfortunately, an entry in the MTLB can only point to a
618          * 32 bit base address of a STLB. Moreover, to initialize the
619          * MMU we need a command buffer with a 32 bit address because
620          * without an MMU there is only an indentity mapping between
621          * the internal 32 bit addresses and the bus addresses.
622          *
623          * To make things easy, we set the dma_coherent_mask to 32
624          * bit to make sure we are allocating the command buffers and
625          * TLBs in the lower 4 GiB address space.
626          */
627         if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(40)) ||
628             dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32))) {
629                 dev_dbg(&pdev->dev, "No suitable DMA available\n");
630                 return -ENODEV;
631         }
632
633         /*
634          * Apply the same DMA configuration to the virtual etnaviv
635          * device as the GPU we found. This assumes that all Vivante
636          * GPUs in the system share the same DMA constraints.
637          */
638         if (first_node)
639                 of_dma_configure(&pdev->dev, first_node, true);
640
641         return component_master_add_with_match(dev, &etnaviv_master_ops, match);
642 }
643
644 static int etnaviv_pdev_remove(struct platform_device *pdev)
645 {
646         component_master_del(&pdev->dev, &etnaviv_master_ops);
647
648         return 0;
649 }
650
651 static struct platform_driver etnaviv_platform_driver = {
652         .probe      = etnaviv_pdev_probe,
653         .remove     = etnaviv_pdev_remove,
654         .driver     = {
655                 .name   = "etnaviv",
656         },
657 };
658
659 static struct platform_device *etnaviv_drm;
660
661 static int __init etnaviv_init(void)
662 {
663         struct platform_device *pdev;
664         int ret;
665         struct device_node *np;
666
667         etnaviv_validate_init();
668
669         ret = platform_driver_register(&etnaviv_gpu_driver);
670         if (ret != 0)
671                 return ret;
672
673         ret = platform_driver_register(&etnaviv_platform_driver);
674         if (ret != 0)
675                 goto unregister_gpu_driver;
676
677         /*
678          * If the DT contains at least one available GPU device, instantiate
679          * the DRM platform device.
680          */
681         for_each_compatible_node(np, NULL, "vivante,gc") {
682                 if (!of_device_is_available(np))
683                         continue;
684
685                 pdev = platform_device_alloc("etnaviv", PLATFORM_DEVID_NONE);
686                 if (!pdev) {
687                         ret = -ENOMEM;
688                         of_node_put(np);
689                         goto unregister_platform_driver;
690                 }
691
692                 ret = platform_device_add(pdev);
693                 if (ret) {
694                         platform_device_put(pdev);
695                         of_node_put(np);
696                         goto unregister_platform_driver;
697                 }
698
699                 etnaviv_drm = pdev;
700                 of_node_put(np);
701                 break;
702         }
703
704         return 0;
705
706 unregister_platform_driver:
707         platform_driver_unregister(&etnaviv_platform_driver);
708 unregister_gpu_driver:
709         platform_driver_unregister(&etnaviv_gpu_driver);
710         return ret;
711 }
712 module_init(etnaviv_init);
713
714 static void __exit etnaviv_exit(void)
715 {
716         platform_device_unregister(etnaviv_drm);
717         platform_driver_unregister(&etnaviv_platform_driver);
718         platform_driver_unregister(&etnaviv_gpu_driver);
719 }
720 module_exit(etnaviv_exit);
721
722 MODULE_AUTHOR("Christian Gmeiner <christian.gmeiner@gmail.com>");
723 MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
724 MODULE_AUTHOR("Lucas Stach <l.stach@pengutronix.de>");
725 MODULE_DESCRIPTION("etnaviv DRM Driver");
726 MODULE_LICENSE("GPL v2");
727 MODULE_ALIAS("platform:etnaviv");