vmwgfx_ldu.c 15.4 KB
Newer Older
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
/**************************************************************************
 *
 * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/

#include "vmwgfx_kms.h"

#define vmw_crtc_to_ldu(x) \
	container_of(x, struct vmw_legacy_display_unit, base.crtc)
#define vmw_encoder_to_ldu(x) \
	container_of(x, struct vmw_legacy_display_unit, base.encoder)
#define vmw_connector_to_ldu(x) \
	container_of(x, struct vmw_legacy_display_unit, base.connector)

struct vmw_legacy_display {
	struct list_head active;

	unsigned num_active;
41
	unsigned last_num_active;
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

	struct vmw_framebuffer *fb;
};

/**
 * Display unit using the legacy register interface.
 */
struct vmw_legacy_display_unit {
	struct vmw_display_unit base;

	struct list_head active;
};

static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
{
	list_del_init(&ldu->active);
	vmw_display_unit_cleanup(&ldu->base);
	kfree(ldu);
}


/*
 * Legacy Display Unit CRTC functions
 */

static void vmw_ldu_crtc_save(struct drm_crtc *crtc)
{
}

static void vmw_ldu_crtc_restore(struct drm_crtc *crtc)
{
}

static void vmw_ldu_crtc_gamma_set(struct drm_crtc *crtc,
				   u16 *r, u16 *g, u16 *b,
				   uint32_t size)
{
}

static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
{
	vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
}

static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
{
	struct vmw_legacy_display *lds = dev_priv->ldu_priv;
	struct vmw_legacy_display_unit *entry;
90
91
	struct drm_framebuffer *fb = NULL;
	struct drm_crtc *crtc = NULL;
92
93
	int i = 0;

94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
	/* If there is no display topology the host just assumes
	 * that the guest will set the same layout as the host.
	 */
	if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
		int w = 0, h = 0;
		list_for_each_entry(entry, &lds->active, active) {
			crtc = &entry->base.crtc;
			w = max(w, crtc->x + crtc->mode.hdisplay);
			h = max(h, crtc->y + crtc->mode.vdisplay);
			i++;
		}

		if (crtc == NULL)
			return 0;
		fb = entry->base.crtc.fb;

		vmw_kms_write_svga(dev_priv, w, h, fb->pitch,
				   fb->bits_per_pixel, fb->depth);

		return 0;
	}

	for (i = 0; i < lds->last_num_active; i++) {
117
118
119
120
121
122
123
124
125
		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, 0);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, 0);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, 0);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, 0);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
	}

126
127
128
129
130
131
132
133
	if (!list_empty(&lds->active)) {
		entry = list_entry(lds->active.next, typeof(*entry), active);
		fb = entry->base.crtc.fb;

		vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitch,
				   fb->bits_per_pixel, fb->depth);
	}

134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
	i = 0;
	list_for_each_entry(entry, &lds->active, active) {
		crtc = &entry->base.crtc;

		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);

		i++;
	}

149
150
151
152
153
154
155
	/* Make sure we always show something. */
	vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS, i ? i : 1);

	BUG_ON(i != lds->num_active);

	lds->last_num_active = lds->num_active;

156
157
158
159
160
161
162
163
164
165
	return 0;
}

static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
			      struct vmw_legacy_display_unit *ldu)
{
	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
	if (list_empty(&ldu->active))
		return 0;

166
	/* Must init otherwise list_empty(&ldu->active) will not work. */
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
	list_del_init(&ldu->active);
	if (--(ld->num_active) == 0) {
		BUG_ON(!ld->fb);
		if (ld->fb->unpin)
			ld->fb->unpin(ld->fb);
		ld->fb = NULL;
	}

	return 0;
}

static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
			      struct vmw_legacy_display_unit *ldu,
			      struct vmw_framebuffer *vfb)
{
	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
	struct vmw_legacy_display_unit *entry;
	struct list_head *at;

186
187
188
189
190
191
192
193
194
	BUG_ON(!ld->num_active && ld->fb);
	if (vfb != ld->fb) {
		if (ld->fb && ld->fb->unpin)
			ld->fb->unpin(ld->fb);
		if (vfb->pin)
			vfb->pin(vfb);
		ld->fb = vfb;
	}

195
196
197
198
199
	if (!list_empty(&ldu->active))
		return 0;

	at = &ld->active;
	list_for_each_entry(entry, &ld->active, active) {
200
		if (entry->base.unit > ldu->base.unit)
201
202
203
204
205
206
			break;

		at = &entry->active;
	}

	list_add(&ldu->active, at);
207
208

	ld->num_active++;
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

	return 0;
}

static int vmw_ldu_crtc_set_config(struct drm_mode_set *set)
{
	struct vmw_private *dev_priv;
	struct vmw_legacy_display_unit *ldu;
	struct drm_connector *connector;
	struct drm_display_mode *mode;
	struct drm_encoder *encoder;
	struct vmw_framebuffer *vfb;
	struct drm_framebuffer *fb;
	struct drm_crtc *crtc;

	if (!set)
		return -EINVAL;

	if (!set->crtc)
		return -EINVAL;

	/* get the ldu */
	crtc = set->crtc;
	ldu = vmw_crtc_to_ldu(crtc);
	vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
	dev_priv = vmw_priv(crtc->dev);

	if (set->num_connectors > 1) {
		DRM_ERROR("to many connectors\n");
		return -EINVAL;
	}

	if (set->num_connectors == 1 &&
	    set->connectors[0] != &ldu->base.connector) {
		DRM_ERROR("connector doesn't match %p %p\n",
			set->connectors[0], &ldu->base.connector);
		return -EINVAL;
	}

	/* ldu only supports one fb active at the time */
	if (dev_priv->ldu_priv->fb && vfb &&
250
251
	    !(dev_priv->ldu_priv->num_active == 1 &&
	      !list_empty(&ldu->active)) &&
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
	    dev_priv->ldu_priv->fb != vfb) {
		DRM_ERROR("Multiple framebuffers not supported\n");
		return -EINVAL;
	}

	/* since they always map one to one these are safe */
	connector = &ldu->base.connector;
	encoder = &ldu->base.encoder;

	/* should we turn the crtc off? */
	if (set->num_connectors == 0 || !set->mode || !set->fb) {

		connector->encoder = NULL;
		encoder->crtc = NULL;
		crtc->fb = NULL;

		vmw_ldu_del_active(dev_priv, ldu);

		vmw_ldu_commit_list(dev_priv);

		return 0;
	}


	/* we now know we want to set a mode */
	mode = set->mode;
	fb = set->fb;

	if (set->x + mode->hdisplay > fb->width ||
	    set->y + mode->vdisplay > fb->height) {
		DRM_ERROR("set outside of framebuffer\n");
		return -EINVAL;
	}

	vmw_fb_off(dev_priv);

	crtc->fb = fb;
	encoder->crtc = crtc;
	connector->encoder = encoder;
	crtc->x = set->x;
	crtc->y = set->y;
	crtc->mode = *mode;

	vmw_ldu_add_active(dev_priv, ldu, vfb);

	vmw_ldu_commit_list(dev_priv);

	return 0;
}

static struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
	.save = vmw_ldu_crtc_save,
	.restore = vmw_ldu_crtc_restore,
	.cursor_set = vmw_du_crtc_cursor_set,
	.cursor_move = vmw_du_crtc_cursor_move,
	.gamma_set = vmw_ldu_crtc_gamma_set,
	.destroy = vmw_ldu_crtc_destroy,
	.set_config = vmw_ldu_crtc_set_config,
};

/*
 * Legacy Display Unit encoder functions
 */

static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
{
	vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
}

static struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
	.destroy = vmw_ldu_encoder_destroy,
};

/*
 * Legacy Display Unit connector functions
 */

static void vmw_ldu_connector_dpms(struct drm_connector *connector, int mode)
{
}

static void vmw_ldu_connector_save(struct drm_connector *connector)
{
}

static void vmw_ldu_connector_restore(struct drm_connector *connector)
{
}

static enum drm_connector_status
	vmw_ldu_connector_detect(struct drm_connector *connector)
{
	/* XXX vmwctrl should control connection status */
	if (vmw_connector_to_ldu(connector)->base.unit == 0)
		return connector_status_connected;
	return connector_status_disconnected;
}

static struct drm_display_mode vmw_ldu_connector_builtin[] = {
	/* 640x480@60Hz */
	{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
		   752, 800, 0, 480, 489, 492, 525, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
	/* 800x600@60Hz */
	{ DRM_MODE("800x600",
		   DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
		   40000, 800, 840, 968, 1056, 0, 600, 601, 605, 628,
		   0, DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1024x768@60Hz */
	{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
		   1184, 1344, 0, 768, 771, 777, 806, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
	/* 1152x864@75Hz */
	{ DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
		   1344, 1600, 0, 864, 865, 868, 900, 0,
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1280x768@60Hz */
	{ DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 79500, 1280, 1344,
		   1472, 1664, 0, 768, 771, 778, 798, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1280x800@60Hz */
	{ DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 83500, 1280, 1352,
		   1480, 1680, 0, 800, 803, 809, 831, 0,
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
	/* 1280x960@60Hz */
	{ DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1376,
		   1488, 1800, 0, 960, 961, 964, 1000, 0,
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1280x1024@60Hz */
	{ DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1328,
		   1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1360x768@60Hz */
	{ DRM_MODE("1360x768", DRM_MODE_TYPE_DRIVER, 85500, 1360, 1424,
		   1536, 1792, 0, 768, 771, 777, 795, 0,
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1440x1050@60Hz */
	{ DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 121750, 1400, 1488,
		   1632, 1864, 0, 1050, 1053, 1057, 1089, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1440x900@60Hz */
	{ DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 106500, 1440, 1520,
		   1672, 1904, 0, 900, 903, 909, 934, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1600x1200@60Hz */
	{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 162000, 1600, 1664,
		   1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1680x1050@60Hz */
	{ DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 146250, 1680, 1784,
		   1960, 2240, 0, 1050, 1053, 1059, 1089, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1792x1344@60Hz */
	{ DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 204750, 1792, 1920,
		   2120, 2448, 0, 1344, 1345, 1348, 1394, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1853x1392@60Hz */
	{ DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 218250, 1856, 1952,
		   2176, 2528, 0, 1392, 1393, 1396, 1439, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1920x1200@60Hz */
	{ DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 193250, 1920, 2056,
		   2256, 2592, 0, 1200, 1203, 1209, 1245, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 1920x1440@60Hz */
	{ DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 234000, 1920, 2048,
		   2256, 2600, 0, 1440, 1441, 1444, 1500, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* 2560x1600@60Hz */
	{ DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 348500, 2560, 2752,
		   3032, 3504, 0, 1600, 1603, 1609, 1658, 0,
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
	/* Terminate */
	{ DRM_MODE("", 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0) },
};

static int vmw_ldu_connector_fill_modes(struct drm_connector *connector,
					uint32_t max_width, uint32_t max_height)
{
	struct drm_device *dev = connector->dev;
	struct drm_display_mode *mode = NULL;
	int i;

	for (i = 0; vmw_ldu_connector_builtin[i].type != 0; i++) {
		if (vmw_ldu_connector_builtin[i].hdisplay > max_width ||
		    vmw_ldu_connector_builtin[i].vdisplay > max_height)
			continue;

		mode = drm_mode_duplicate(dev, &vmw_ldu_connector_builtin[i]);
		if (!mode)
			return 0;
		mode->vrefresh = drm_mode_vrefresh(mode);

		drm_mode_probed_add(connector, mode);
	}

	drm_mode_connector_list_update(connector);

	return 1;
}

static int vmw_ldu_connector_set_property(struct drm_connector *connector,
					  struct drm_property *property,
					  uint64_t val)
{
	return 0;
}

static void vmw_ldu_connector_destroy(struct drm_connector *connector)
{
	vmw_ldu_destroy(vmw_connector_to_ldu(connector));
}

static struct drm_connector_funcs vmw_legacy_connector_funcs = {
	.dpms = vmw_ldu_connector_dpms,
	.save = vmw_ldu_connector_save,
	.restore = vmw_ldu_connector_restore,
	.detect = vmw_ldu_connector_detect,
	.fill_modes = vmw_ldu_connector_fill_modes,
	.set_property = vmw_ldu_connector_set_property,
	.destroy = vmw_ldu_connector_destroy,
};

static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
{
	struct vmw_legacy_display_unit *ldu;
	struct drm_device *dev = dev_priv->dev;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	struct drm_crtc *crtc;

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

487
	ldu->base.unit = unit;
488
489
490
491
	crtc = &ldu->base.crtc;
	encoder = &ldu->base.encoder;
	connector = &ldu->base.connector;

492
493
	INIT_LIST_HEAD(&ldu->active);

494
495
	drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
			   DRM_MODE_CONNECTOR_LVDS);
496
	connector->status = vmw_ldu_connector_detect(connector);
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

	drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
			 DRM_MODE_ENCODER_LVDS);
	drm_mode_connector_attach_encoder(connector, encoder);
	encoder->possible_crtcs = (1 << unit);
	encoder->possible_clones = 0;

	drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs);

	drm_connector_attach_property(connector,
				      dev->mode_config.dirty_info_property,
				      1);

	return 0;
}

int vmw_kms_init_legacy_display_system(struct vmw_private *dev_priv)
{
	if (dev_priv->ldu_priv) {
		DRM_INFO("ldu system already on\n");
		return -EINVAL;
	}

	dev_priv->ldu_priv = kmalloc(GFP_KERNEL, sizeof(*dev_priv->ldu_priv));

	if (!dev_priv->ldu_priv)
		return -ENOMEM;

	INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
	dev_priv->ldu_priv->num_active = 0;
527
	dev_priv->ldu_priv->last_num_active = 0;
528
529
530
531
532
	dev_priv->ldu_priv->fb = NULL;

	drm_mode_create_dirty_info_property(dev_priv->dev);

	vmw_ldu_init(dev_priv, 0);
533
534
535
536
537
538
539
540
541
542
	/* for old hardware without multimon only enable one display */
	if (dev_priv->capabilities & SVGA_CAP_MULTIMON) {
		vmw_ldu_init(dev_priv, 1);
		vmw_ldu_init(dev_priv, 2);
		vmw_ldu_init(dev_priv, 3);
		vmw_ldu_init(dev_priv, 4);
		vmw_ldu_init(dev_priv, 5);
		vmw_ldu_init(dev_priv, 6);
		vmw_ldu_init(dev_priv, 7);
	}
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557

	return 0;
}

int vmw_kms_close_legacy_display_system(struct vmw_private *dev_priv)
{
	if (!dev_priv->ldu_priv)
		return -ENOSYS;

	BUG_ON(!list_empty(&dev_priv->ldu_priv->active));

	kfree(dev_priv->ldu_priv);

	return 0;
}