summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/osi.c
blob: b2a16ed7e81a97da10129fcaea23ce93a4926f3c (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
/*
 *  osi.c - _OSI implementation
 *
 *  Copyright (C) 2016 Intel Corporation
 *    Author: Lv Zheng <lv.zheng@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

/* Uncomment next line to get verbose printout */
/* #define DEBUG */
#define pr_fmt(fmt) "ACPI: " fmt

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/platform_data/x86/apple.h>

#include "internal.h"


#define OSI_STRING_LENGTH_MAX	64
#define OSI_STRING_ENTRIES_MAX	16

struct acpi_osi_entry {
	char string[OSI_STRING_LENGTH_MAX];
	bool enable;
};

static struct acpi_osi_config {
	u8		default_disabling;
	unsigned int	linux_enable:1;
	unsigned int	linux_dmi:1;
	unsigned int	linux_cmdline:1;
	unsigned int	darwin_enable:1;
	unsigned int	darwin_dmi:1;
	unsigned int	darwin_cmdline:1;
} osi_config;

static struct acpi_osi_config osi_config;
static struct acpi_osi_entry
osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
	{"Module Device", true},
	{"Processor Device", true},
	{"3.0 _SCP Extensions", true},
	{"Processor Aggregator Device", true},
	/*
	 * Linux-Dell-Video is used by BIOS to disable RTD3 for NVidia graphics
	 * cards as RTD3 is not supported by drivers now.  Systems with NVidia
	 * cards will hang without RTD3 disabled.
	 *
	 * Once NVidia drivers officially support RTD3, this _OSI strings can
	 * be removed if both new and old graphics cards are supported.
	 */
	{"Linux-Dell-Video", true},
	/*
	 * Linux-Lenovo-NV-HDMI-Audio is used by BIOS to power on NVidia's HDMI
	 * audio device which is turned off for power-saving in Windows OS.
	 * This power management feature observed on some Lenovo Thinkpad
	 * systems which will not be able to output audio via HDMI without
	 * a BIOS workaround.
	 */
	{"Linux-Lenovo-NV-HDMI-Audio", true},
};

static u32 acpi_osi_handler(acpi_string interface, u32 supported)
{
	if (!strcmp("Linux", interface)) {
		pr_notice_once(FW_BUG
			"BIOS _OSI(Linux) query %s%s\n",
			osi_config.linux_enable ? "honored" : "ignored",
			osi_config.linux_cmdline ? " via cmdline" :
			osi_config.linux_dmi ? " via DMI" : "");
	}
	if (!strcmp("Darwin", interface)) {
		pr_notice_once(
			"BIOS _OSI(Darwin) query %s%s\n",
			osi_config.darwin_enable ? "honored" : "ignored",
			osi_config.darwin_cmdline ? " via cmdline" :
			osi_config.darwin_dmi ? " via DMI" : "");
	}

	return supported;
}

void __init acpi_osi_setup(char *str)
{
	struct acpi_osi_entry *osi;
	bool enable = true;
	int i;

	if (!acpi_gbl_create_osi_method)
		return;

	if (str == NULL || *str == '\0') {
		pr_info("_OSI method disabled\n");
		acpi_gbl_create_osi_method = FALSE;
		return;
	}

	if (*str == '!') {
		str++;
		if (*str == '\0') {
			/* Do not override acpi_osi=!* */
			if (!osi_config.default_disabling)
				osi_config.default_disabling =
					ACPI_DISABLE_ALL_VENDOR_STRINGS;
			return;
		} else if (*str == '*') {
			osi_config.default_disabling = ACPI_DISABLE_ALL_STRINGS;
			for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
				osi = &osi_setup_entries[i];
				osi->enable = false;
			}
			return;
		} else if (*str == '!') {
			osi_config.default_disabling = 0;
			return;
		}
		enable = false;
	}

	for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
		osi = &osi_setup_entries[i];
		if (!strcmp(osi->string, str)) {
			osi->enable = enable;
			break;
		} else if (osi->string[0] == '\0') {
			osi->enable = enable;
			strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
			break;
		}
	}
}

static void __init __acpi_osi_setup_darwin(bool enable)
{
	osi_config.darwin_enable = !!enable;
	if (enable) {
		acpi_osi_setup("!");
		acpi_osi_setup("Darwin");
	} else {
		acpi_osi_setup("!!");
		acpi_osi_setup("!Darwin");
	}
}

static void __init acpi_osi_setup_darwin(bool enable)
{
	/* Override acpi_osi_dmi_blacklisted() */
	osi_config.darwin_dmi = 0;
	osi_config.darwin_cmdline = 1;
	__acpi_osi_setup_darwin(enable);
}

/*
 * The story of _OSI(Linux)
 *
 * From pre-history through Linux-2.6.22, Linux responded TRUE upon a BIOS
 * OSI(Linux) query.
 *
 * Unfortunately, reference BIOS writers got wind of this and put
 * OSI(Linux) in their example code, quickly exposing this string as
 * ill-conceived and opening the door to an un-bounded number of BIOS
 * incompatibilities.
 *
 * For example, OSI(Linux) was used on resume to re-POST a video card on
 * one system, because Linux at that time could not do a speedy restore in
 * its native driver. But then upon gaining quick native restore
 * capability, Linux has no way to tell the BIOS to skip the time-consuming
 * POST -- putting Linux at a permanent performance disadvantage. On
 * another system, the BIOS writer used OSI(Linux) to infer native OS
 * support for IPMI!  On other systems, OSI(Linux) simply got in the way of
 * Linux claiming to be compatible with other operating systems, exposing
 * BIOS issues such as skipped device initialization.
 *
 * So "Linux" turned out to be a really poor chose of OSI string, and from
 * Linux-2.6.23 onward we respond FALSE.
 *
 * BIOS writers should NOT query _OSI(Linux) on future systems. Linux will
 * complain on the console when it sees it, and return FALSE. To get Linux
 * to return TRUE for your system  will require a kernel source update to
 * add a DMI entry, or boot with "acpi_osi=Linux"
 */
static void __init __acpi_osi_setup_linux(bool enable)
{
	osi_config.linux_enable = !!enable;
	if (enable)
		acpi_osi_setup("Linux");
	else
		acpi_osi_setup("!Linux");
}

static void __init acpi_osi_setup_linux(bool enable)
{
	/* Override acpi_osi_dmi_blacklisted() */
	osi_config.linux_dmi = 0;
	osi_config.linux_cmdline = 1;
	__acpi_osi_setup_linux(enable);
}

/*
 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
 *
 * empty string disables _OSI
 * string starting with '!' disables that string
 * otherwise string is added to list, augmenting built-in strings
 */
static void __init acpi_osi_setup_late(void)
{
	struct acpi_osi_entry *osi;
	char *str;
	int i;
	acpi_status status;

	if (osi_config.default_disabling) {
		status = acpi_update_interfaces(osi_config.default_disabling);
		if (ACPI_SUCCESS(status))
			pr_info("Disabled all _OSI OS vendors%s\n",
				osi_config.default_disabling ==
				ACPI_DISABLE_ALL_STRINGS ?
				" and feature groups" : "");
	}

	for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
		osi = &osi_setup_entries[i];
		str = osi->string;
		if (*str == '\0')
			break;
		if (osi->enable) {
			status = acpi_install_interface(str);
			if (ACPI_SUCCESS(status))
				pr_info("Added _OSI(%s)\n", str);
		} else {
			status = acpi_remove_interface(str);
			if (ACPI_SUCCESS(status))
				pr_info("Deleted _OSI(%s)\n", str);
		}
	}
}

static int __init osi_setup(char *str)
{
	if (str && !strcmp("Linux", str))
		acpi_osi_setup_linux(true);
	else if (str && !strcmp("!Linux", str))
		acpi_osi_setup_linux(false);
	else if (str && !strcmp("Darwin", str))
		acpi_osi_setup_darwin(true);
	else if (str && !strcmp("!Darwin", str))
		acpi_osi_setup_darwin(false);
	else
		acpi_osi_setup(str);

	return 1;
}
__setup("acpi_osi=", osi_setup);

bool acpi_osi_is_win8(void)
{
	return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
}
EXPORT_SYMBOL(acpi_osi_is_win8);

static void __init acpi_osi_dmi_darwin(void)
{
	pr_notice("DMI detected to setup _OSI(\"Darwin\"): Apple hardware\n");
	osi_config.darwin_dmi = 1;
	__acpi_osi_setup_darwin(true);
}

static void __init acpi_osi_dmi_linux(bool enable,
				      const struct dmi_system_id *d)
{
	pr_notice("DMI detected to setup _OSI(\"Linux\"): %s\n", d->ident);
	osi_config.linux_dmi = 1;
	__acpi_osi_setup_linux(enable);
}

static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
{
	acpi_osi_dmi_linux(true, d);

	return 0;
}

static int __init dmi_disable_osi_vista(const struct dmi_system_id *d)
{
	pr_notice("DMI detected: %s\n", d->ident);
	acpi_osi_setup("!Windows 2006");
	acpi_osi_setup("!Windows 2006 SP1");
	acpi_osi_setup("!Windows 2006 SP2");

	return 0;
}

static int __init dmi_disable_osi_win7(const struct dmi_system_id *d)
{
	pr_notice("DMI detected: %s\n", d->ident);
	acpi_osi_setup("!Windows 2009");

	return 0;
}

static int __init dmi_disable_osi_win8(const struct dmi_system_id *d)
{
	pr_notice("DMI detected: %s\n", d->ident);
	acpi_osi_setup("!Windows 2012");

	return 0;
}

/*
 * Linux default _OSI response behavior is determined by this DMI table.
 *
 * Note that _OSI("Linux")/_OSI("Darwin") determined here can be overridden
 * by acpi_osi=!Linux/acpi_osi=!Darwin command line options.
 */
static const struct dmi_system_id acpi_osi_dmi_table[] __initconst = {
	{
	.callback = dmi_disable_osi_vista,
	.ident = "Fujitsu Siemens",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
		},
	},
	{
	/*
	 * There have a NVIF method in MSI GX723 DSDT need call by Nvidia
	 * driver (e.g. nouveau) when user press brightness hotkey.
	 * Currently, nouveau driver didn't do the job and it causes there
	 * have a infinite while loop in DSDT when user press hotkey.
	 * We add MSI GX723's dmi information to this table for workaround
	 * this issue.
	 * Will remove MSI GX723 from the table after nouveau grows support.
	 */
	.callback = dmi_disable_osi_vista,
	.ident = "MSI GX723",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "GX723"),
		},
	},
	{
	.callback = dmi_disable_osi_vista,
	.ident = "Sony VGN-NS10J_S",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"),
		},
	},
	{
	.callback = dmi_disable_osi_vista,
	.ident = "Sony VGN-SR290J",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR290J"),
		},
	},
	{
	.callback = dmi_disable_osi_vista,
	.ident = "VGN-NS50B_L",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS50B_L"),
		},
	},
	{
	.callback = dmi_disable_osi_vista,
	.ident = "VGN-SR19XN",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR19XN"),
		},
	},
	{
	.callback = dmi_disable_osi_vista,
	.ident = "Toshiba Satellite L355",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
		     DMI_MATCH(DMI_PRODUCT_VERSION, "Satellite L355"),
		},
	},
	{
	.callback = dmi_disable_osi_win7,
	.ident = "ASUS K50IJ",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
		     DMI_MATCH(DMI_PRODUCT_NAME, "K50IJ"),
		},
	},
	{
	.callback = dmi_disable_osi_vista,
	.ident = "Toshiba P305D",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P305D"),
		},
	},
	{
	.callback = dmi_disable_osi_vista,
	.ident = "Toshiba NB100",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "NB100"),
		},
	},

	/*
	 * The wireless hotkey does not work on those machines when
	 * returning true for _OSI("Windows 2012")
	 */
	{
	.callback = dmi_disable_osi_win8,
	.ident = "Dell Inspiron 7737",
	.matches = {
		    DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
		    DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7737"),
		},
	},
	{
	.callback = dmi_disable_osi_win8,
	.ident = "Dell Inspiron 7537",
	.matches = {
		    DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
		    DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7537"),
		},
	},
	{
	.callback = dmi_disable_osi_win8,
	.ident = "Dell Inspiron 5437",
	.matches = {
		    DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
		    DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5437"),
		},
	},
	{
	.callback = dmi_disable_osi_win8,
	.ident = "Dell Inspiron 3437",
	.matches = {
		    DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
		    DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 3437"),
		},
	},
	{
	.callback = dmi_disable_osi_win8,
	.ident = "Dell Vostro 3446",
	.matches = {
		    DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
		    DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3446"),
		},
	},
	{
	.callback = dmi_disable_osi_win8,
	.ident = "Dell Vostro 3546",
	.matches = {
		    DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
		    DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3546"),
		},
	},

	/*
	 * BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
	 * Linux ignores it, except for the machines enumerated below.
	 */

	/*
	 * Without this this EEEpc exports a non working WMI interface, with
	 * this it exports a working "good old" eeepc_laptop interface, fixing
	 * both brightness control, and rfkill not working.
	 */
	{
	.callback = dmi_enable_osi_linux,
	.ident = "Asus EEE PC 1015PX",
	.matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
		     DMI_MATCH(DMI_PRODUCT_NAME, "1015PX"),
		},
	},
	{}
};

static __init void acpi_osi_dmi_blacklisted(void)
{
	dmi_check_system(acpi_osi_dmi_table);

	/* Enable _OSI("Darwin") for Apple platforms. */
	if (x86_apple_machine)
		acpi_osi_dmi_darwin();
}

int __init early_acpi_osi_init(void)
{
	acpi_osi_dmi_blacklisted();

	return 0;
}

int __init acpi_osi_init(void)
{
	acpi_install_interface_handler(acpi_osi_handler);
	acpi_osi_setup_late();

	return 0;
}
OpenPOWER on IntegriCloud