summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/host1x/drm/drm.c
blob: e184b00faacdfe3688dd262a1bbac8f4346a6643 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
/*
 * Copyright (C) 2012 Avionic Design GmbH
 * Copyright (C) 2012-2013 NVIDIA CORPORATION.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>

#include <linux/dma-mapping.h>
#include <asm/dma-iommu.h>

#include <drm/drm.h>
#include <drm/drmP.h>

#include "host1x_client.h"
#include "dev.h"
#include "drm.h"
#include "gem.h"
#include "syncpt.h"

#define DRIVER_NAME "tegra"
#define DRIVER_DESC "NVIDIA Tegra graphics"
#define DRIVER_DATE "20120330"
#define DRIVER_MAJOR 0
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 0

struct host1x_drm_client {
	struct host1x_client *client;
	struct device_node *np;
	struct list_head list;
};

static int host1x_add_drm_client(struct host1x_drm *host1x,
				 struct device_node *np)
{
	struct host1x_drm_client *client;

	client = kzalloc(sizeof(*client), GFP_KERNEL);
	if (!client)
		return -ENOMEM;

	INIT_LIST_HEAD(&client->list);
	client->np = of_node_get(np);

	list_add_tail(&client->list, &host1x->drm_clients);

	return 0;
}

static int host1x_activate_drm_client(struct host1x_drm *host1x,
				      struct host1x_drm_client *drm,
				      struct host1x_client *client)
{
	mutex_lock(&host1x->drm_clients_lock);
	list_del_init(&drm->list);
	list_add_tail(&drm->list, &host1x->drm_active);
	drm->client = client;
	mutex_unlock(&host1x->drm_clients_lock);

	return 0;
}

static int host1x_remove_drm_client(struct host1x_drm *host1x,
				    struct host1x_drm_client *client)
{
	mutex_lock(&host1x->drm_clients_lock);
	list_del_init(&client->list);
	mutex_unlock(&host1x->drm_clients_lock);

	of_node_put(client->np);
	kfree(client);

	return 0;
}

static int host1x_parse_dt(struct host1x_drm *host1x)
{
	static const char * const compat[] = {
		"nvidia,tegra20-dc",
		"nvidia,tegra20-hdmi",
		"nvidia,tegra20-gr2d",
		"nvidia,tegra30-dc",
		"nvidia,tegra30-hdmi",
		"nvidia,tegra30-gr2d",
	};
	unsigned int i;
	int err;

	for (i = 0; i < ARRAY_SIZE(compat); i++) {
		struct device_node *np;

		for_each_child_of_node(host1x->dev->of_node, np) {
			if (of_device_is_compatible(np, compat[i]) &&
			    of_device_is_available(np)) {
				err = host1x_add_drm_client(host1x, np);
				if (err < 0)
					return err;
			}
		}
	}

	return 0;
}

int host1x_drm_alloc(struct platform_device *pdev)
{
	struct host1x_drm *host1x;
	int err;

	host1x = devm_kzalloc(&pdev->dev, sizeof(*host1x), GFP_KERNEL);
	if (!host1x)
		return -ENOMEM;

	mutex_init(&host1x->drm_clients_lock);
	INIT_LIST_HEAD(&host1x->drm_clients);
	INIT_LIST_HEAD(&host1x->drm_active);
	mutex_init(&host1x->clients_lock);
	INIT_LIST_HEAD(&host1x->clients);
	host1x->dev = &pdev->dev;

	err = host1x_parse_dt(host1x);
	if (err < 0) {
		dev_err(&pdev->dev, "failed to parse DT: %d\n", err);
		return err;
	}

	host1x_set_drm_data(&pdev->dev, host1x);

	return 0;
}

int host1x_drm_init(struct host1x_drm *host1x, struct drm_device *drm)
{
	struct host1x_client *client;

	mutex_lock(&host1x->clients_lock);

	list_for_each_entry(client, &host1x->clients, list) {
		if (client->ops && client->ops->drm_init) {
			int err = client->ops->drm_init(client, drm);
			if (err < 0) {
				dev_err(host1x->dev,
					"DRM setup failed for %s: %d\n",
					dev_name(client->dev), err);
				mutex_unlock(&host1x->clients_lock);
				return err;
			}
		}
	}

	mutex_unlock(&host1x->clients_lock);

	return 0;
}

int host1x_drm_exit(struct host1x_drm *host1x)
{
	struct platform_device *pdev = to_platform_device(host1x->dev);
	struct host1x_client *client;

	if (!host1x->drm)
		return 0;

	mutex_lock(&host1x->clients_lock);

	list_for_each_entry_reverse(client, &host1x->clients, list) {
		if (client->ops && client->ops->drm_exit) {
			int err = client->ops->drm_exit(client);
			if (err < 0) {
				dev_err(host1x->dev,
					"DRM cleanup failed for %s: %d\n",
					dev_name(client->dev), err);
				mutex_unlock(&host1x->clients_lock);
				return err;
			}
		}
	}

	mutex_unlock(&host1x->clients_lock);

	drm_platform_exit(&tegra_drm_driver, pdev);
	host1x->drm = NULL;

	return 0;
}

int host1x_register_client(struct host1x_drm *host1x,
			   struct host1x_client *client)
{
	struct host1x_drm_client *drm, *tmp;
	int err;

	mutex_lock(&host1x->clients_lock);
	list_add_tail(&client->list, &host1x->clients);
	mutex_unlock(&host1x->clients_lock);

	list_for_each_entry_safe(drm, tmp, &host1x->drm_clients, list)
		if (drm->np == client->dev->of_node)
			host1x_activate_drm_client(host1x, drm, client);

	if (list_empty(&host1x->drm_clients)) {
		struct platform_device *pdev = to_platform_device(host1x->dev);

		err = drm_platform_init(&tegra_drm_driver, pdev);
		if (err < 0) {
			dev_err(host1x->dev, "drm_platform_init(): %d\n", err);
			return err;
		}
	}

	return 0;
}

int host1x_unregister_client(struct host1x_drm *host1x,
			     struct host1x_client *client)
{
	struct host1x_drm_client *drm, *tmp;
	int err;

	list_for_each_entry_safe(drm, tmp, &host1x->drm_active, list) {
		if (drm->client == client) {
			err = host1x_drm_exit(host1x);
			if (err < 0) {
				dev_err(host1x->dev, "host1x_drm_exit(): %d\n",
					err);
				return err;
			}

			host1x_remove_drm_client(host1x, drm);
			break;
		}
	}

	mutex_lock(&host1x->clients_lock);
	list_del_init(&client->list);
	mutex_unlock(&host1x->clients_lock);

	return 0;
}

static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
{
	struct host1x_drm *host1x;
	int err;

	host1x = host1x_get_drm_data(drm->dev);
	drm->dev_private = host1x;
	host1x->drm = drm;

	drm_mode_config_init(drm);

	err = host1x_drm_init(host1x, drm);
	if (err < 0)
		return err;

	/*
	 * We don't use the drm_irq_install() helpers provided by the DRM
	 * core, so we need to set this manually in order to allow the
	 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
	 */
	drm->irq_enabled = 1;

	err = drm_vblank_init(drm, drm->mode_config.num_crtc);
	if (err < 0)
		return err;

	err = tegra_drm_fb_init(drm);
	if (err < 0)
		return err;

	drm_kms_helper_poll_init(drm);

	return 0;
}

static int tegra_drm_unload(struct drm_device *drm)
{
	drm_kms_helper_poll_fini(drm);
	tegra_drm_fb_exit(drm);

	drm_mode_config_cleanup(drm);

	return 0;
}

static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
{
	struct host1x_drm_file *fpriv;

	fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
	if (!fpriv)
		return -ENOMEM;

	INIT_LIST_HEAD(&fpriv->contexts);
	filp->driver_priv = fpriv;

	return 0;
}

static void host1x_drm_context_free(struct host1x_drm_context *context)
{
	context->client->ops->close_channel(context);
	kfree(context);
}

static void tegra_drm_lastclose(struct drm_device *drm)
{
	struct host1x_drm *host1x = drm->dev_private;

	tegra_fbdev_restore_mode(host1x->fbdev);
}

#ifdef CONFIG_DRM_TEGRA_STAGING
static bool host1x_drm_file_owns_context(struct host1x_drm_file *file,
					 struct host1x_drm_context *context)
{
	struct host1x_drm_context *ctx;

	list_for_each_entry(ctx, &file->contexts, list)
		if (ctx == context)
			return true;

	return false;
}

static int tegra_gem_create(struct drm_device *drm, void *data,
			    struct drm_file *file)
{
	struct drm_tegra_gem_create *args = data;
	struct tegra_bo *bo;

	bo = tegra_bo_create_with_handle(file, drm, args->size,
					 &args->handle);
	if (IS_ERR(bo))
		return PTR_ERR(bo);

	return 0;
}

static int tegra_gem_mmap(struct drm_device *drm, void *data,
			  struct drm_file *file)
{
	struct drm_tegra_gem_mmap *args = data;
	struct drm_gem_object *gem;
	struct tegra_bo *bo;

	gem = drm_gem_object_lookup(drm, file, args->handle);
	if (!gem)
		return -EINVAL;

	bo = to_tegra_bo(gem);

	args->offset = tegra_bo_get_mmap_offset(bo);

	drm_gem_object_unreference(gem);

	return 0;
}

static int tegra_syncpt_read(struct drm_device *drm, void *data,
			     struct drm_file *file)
{
	struct drm_tegra_syncpt_read *args = data;
	struct host1x *host = dev_get_drvdata(drm->dev);
	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);

	if (!sp)
		return -EINVAL;

	args->value = host1x_syncpt_read_min(sp);
	return 0;
}

static int tegra_syncpt_incr(struct drm_device *drm, void *data,
			     struct drm_file *file)
{
	struct drm_tegra_syncpt_incr *args = data;
	struct host1x *host = dev_get_drvdata(drm->dev);
	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);

	if (!sp)
		return -EINVAL;

	return host1x_syncpt_incr(sp);
}

static int tegra_syncpt_wait(struct drm_device *drm, void *data,
			     struct drm_file *file)
{
	struct drm_tegra_syncpt_wait *args = data;
	struct host1x *host = dev_get_drvdata(drm->dev);
	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);

	if (!sp)
		return -EINVAL;

	return host1x_syncpt_wait(sp, args->thresh, args->timeout,
				  &args->value);
}

static int tegra_open_channel(struct drm_device *drm, void *data,
			      struct drm_file *file)
{
	struct drm_tegra_open_channel *args = data;
	struct host1x_client *client;
	struct host1x_drm_context *context;
	struct host1x_drm_file *fpriv = file->driver_priv;
	struct host1x_drm *host1x = drm->dev_private;
	int err = -ENODEV;

	context = kzalloc(sizeof(*context), GFP_KERNEL);
	if (!context)
		return -ENOMEM;

	list_for_each_entry(client, &host1x->clients, list)
		if (client->class == args->client) {
			err = client->ops->open_channel(client, context);
			if (err)
				break;

			context->client = client;
			list_add(&context->list, &fpriv->contexts);
			args->context = (uintptr_t)context;
			return 0;
		}

	kfree(context);
	return err;
}

static int tegra_close_channel(struct drm_device *drm, void *data,
			       struct drm_file *file)
{
	struct drm_tegra_close_channel *args = data;
	struct host1x_drm_file *fpriv = file->driver_priv;
	struct host1x_drm_context *context =
		(struct host1x_drm_context *)(uintptr_t)args->context;

	if (!host1x_drm_file_owns_context(fpriv, context))
		return -EINVAL;

	list_del(&context->list);
	host1x_drm_context_free(context);

	return 0;
}

static int tegra_get_syncpt(struct drm_device *drm, void *data,
			    struct drm_file *file)
{
	struct drm_tegra_get_syncpt *args = data;
	struct host1x_drm_file *fpriv = file->driver_priv;
	struct host1x_drm_context *context =
		(struct host1x_drm_context *)(uintptr_t)args->context;
	struct host1x_syncpt *syncpt;

	if (!host1x_drm_file_owns_context(fpriv, context))
		return -ENODEV;

	if (args->index >= context->client->num_syncpts)
		return -EINVAL;

	syncpt = context->client->syncpts[args->index];
	args->id = host1x_syncpt_id(syncpt);

	return 0;
}

static int tegra_submit(struct drm_device *drm, void *data,
			struct drm_file *file)
{
	struct drm_tegra_submit *args = data;
	struct host1x_drm_file *fpriv = file->driver_priv;
	struct host1x_drm_context *context =
		(struct host1x_drm_context *)(uintptr_t)args->context;

	if (!host1x_drm_file_owns_context(fpriv, context))
		return -ENODEV;

	return context->client->ops->submit(context, args, drm, file);
}
#endif

static struct drm_ioctl_desc tegra_drm_ioctls[] = {
#ifdef CONFIG_DRM_TEGRA_STAGING
	DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED | DRM_AUTH),
	DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
#endif
};

static const struct file_operations tegra_drm_fops = {
	.owner = THIS_MODULE,
	.open = drm_open,
	.release = drm_release,
	.unlocked_ioctl = drm_ioctl,
	.mmap = tegra_drm_mmap,
	.poll = drm_poll,
	.fasync = drm_fasync,
	.read = drm_read,
#ifdef CONFIG_COMPAT
	.compat_ioctl = drm_compat_ioctl,
#endif
	.llseek = noop_llseek,
};

static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm, int pipe)
{
	struct drm_crtc *crtc;

	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
		struct tegra_dc *dc = to_tegra_dc(crtc);

		if (dc->pipe == pipe)
			return crtc;
	}

	return NULL;
}

static u32 tegra_drm_get_vblank_counter(struct drm_device *dev, int crtc)
{
	/* TODO: implement real hardware counter using syncpoints */
	return drm_vblank_count(dev, crtc);
}

static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
{
	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
	struct tegra_dc *dc = to_tegra_dc(crtc);

	if (!crtc)
		return -ENODEV;

	tegra_dc_enable_vblank(dc);

	return 0;
}

static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
{
	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
	struct tegra_dc *dc = to_tegra_dc(crtc);

	if (crtc)
		tegra_dc_disable_vblank(dc);
}

static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
{
	struct host1x_drm_file *fpriv = file->driver_priv;
	struct host1x_drm_context *context, *tmp;
	struct drm_crtc *crtc;

	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
		tegra_dc_cancel_page_flip(crtc, file);

	list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
		host1x_drm_context_free(context);

	kfree(fpriv);
}

#ifdef CONFIG_DEBUG_FS
static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *)s->private;
	struct drm_device *drm = node->minor->dev;
	struct drm_framebuffer *fb;

	mutex_lock(&drm->mode_config.fb_lock);

	list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
		seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
			   fb->base.id, fb->width, fb->height, fb->depth,
			   fb->bits_per_pixel,
			   atomic_read(&fb->refcount.refcount));
	}

	mutex_unlock(&drm->mode_config.fb_lock);

	return 0;
}

static struct drm_info_list tegra_debugfs_list[] = {
	{ "framebuffers", tegra_debugfs_framebuffers, 0 },
};

static int tegra_debugfs_init(struct drm_minor *minor)
{
	return drm_debugfs_create_files(tegra_debugfs_list,
					ARRAY_SIZE(tegra_debugfs_list),
					minor->debugfs_root, minor);
}

static void tegra_debugfs_cleanup(struct drm_minor *minor)
{
	drm_debugfs_remove_files(tegra_debugfs_list,
				 ARRAY_SIZE(tegra_debugfs_list), minor);
}
#endif

struct drm_driver tegra_drm_driver = {
	.driver_features = DRIVER_MODESET | DRIVER_GEM,
	.load = tegra_drm_load,
	.unload = tegra_drm_unload,
	.open = tegra_drm_open,
	.preclose = tegra_drm_preclose,
	.lastclose = tegra_drm_lastclose,

	.get_vblank_counter = tegra_drm_get_vblank_counter,
	.enable_vblank = tegra_drm_enable_vblank,
	.disable_vblank = tegra_drm_disable_vblank,

#if defined(CONFIG_DEBUG_FS)
	.debugfs_init = tegra_debugfs_init,
	.debugfs_cleanup = tegra_debugfs_cleanup,
#endif

	.gem_free_object = tegra_bo_free_object,
	.gem_vm_ops = &tegra_bo_vm_ops,
	.dumb_create = tegra_bo_dumb_create,
	.dumb_map_offset = tegra_bo_dumb_map_offset,
	.dumb_destroy = tegra_bo_dumb_destroy,

	.ioctls = tegra_drm_ioctls,
	.num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
	.fops = &tegra_drm_fops,

	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
	.patchlevel = DRIVER_PATCHLEVEL,
};
OpenPOWER on IntegriCloud