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e5f660eb LZ |
1 | /* |
2 | * osi.c - _OSI implementation | |
3 | * | |
4 | * Copyright (C) 2016 Intel Corporation | |
5 | * Author: Lv Zheng <lv.zheng@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
20 | */ | |
21 | ||
22 | /* Uncomment next line to get verbose printout */ | |
23 | /* #define DEBUG */ | |
24 | #define pr_fmt(fmt) "ACPI: " fmt | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/acpi.h> | |
29 | #include <linux/dmi.h> | |
30 | ||
31 | #include "internal.h" | |
32 | ||
33 | ||
34 | #define OSI_STRING_LENGTH_MAX 64 | |
35 | #define OSI_STRING_ENTRIES_MAX 16 | |
36 | ||
37 | struct acpi_osi_entry { | |
38 | char string[OSI_STRING_LENGTH_MAX]; | |
39 | bool enable; | |
40 | }; | |
41 | ||
42 | static struct acpi_osi_config { | |
43 | u8 default_disabling; | |
44 | unsigned int linux_enable:1; | |
45 | unsigned int linux_dmi:1; | |
46 | unsigned int linux_cmdline:1; | |
47 | unsigned int darwin_enable:1; | |
48 | unsigned int darwin_dmi:1; | |
49 | unsigned int darwin_cmdline:1; | |
50 | } osi_config; | |
51 | ||
52 | static struct acpi_osi_config osi_config; | |
53 | static struct acpi_osi_entry | |
54 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { | |
55 | {"Module Device", true}, | |
56 | {"Processor Device", true}, | |
57 | {"3.0 _SCP Extensions", true}, | |
58 | {"Processor Aggregator Device", true}, | |
59 | }; | |
60 | ||
61 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) | |
62 | { | |
63 | if (!strcmp("Linux", interface)) { | |
64 | pr_notice_once(FW_BUG | |
65 | "BIOS _OSI(Linux) query %s%s\n", | |
66 | osi_config.linux_enable ? "honored" : "ignored", | |
67 | osi_config.linux_cmdline ? " via cmdline" : | |
68 | osi_config.linux_dmi ? " via DMI" : ""); | |
69 | } | |
70 | if (!strcmp("Darwin", interface)) { | |
71 | pr_notice_once( | |
72 | "BIOS _OSI(Darwin) query %s%s\n", | |
73 | osi_config.darwin_enable ? "honored" : "ignored", | |
74 | osi_config.darwin_cmdline ? " via cmdline" : | |
75 | osi_config.darwin_dmi ? " via DMI" : ""); | |
76 | } | |
77 | ||
78 | return supported; | |
79 | } | |
80 | ||
81 | void __init acpi_osi_setup(char *str) | |
82 | { | |
83 | struct acpi_osi_entry *osi; | |
84 | bool enable = true; | |
85 | int i; | |
86 | ||
87 | if (!acpi_gbl_create_osi_method) | |
88 | return; | |
89 | ||
90 | if (str == NULL || *str == '\0') { | |
91 | pr_info("_OSI method disabled\n"); | |
92 | acpi_gbl_create_osi_method = FALSE; | |
93 | return; | |
94 | } | |
95 | ||
96 | if (*str == '!') { | |
97 | str++; | |
98 | if (*str == '\0') { | |
99 | /* Do not override acpi_osi=!* */ | |
100 | if (!osi_config.default_disabling) | |
101 | osi_config.default_disabling = | |
102 | ACPI_DISABLE_ALL_VENDOR_STRINGS; | |
103 | return; | |
104 | } else if (*str == '*') { | |
105 | osi_config.default_disabling = ACPI_DISABLE_ALL_STRINGS; | |
106 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
107 | osi = &osi_setup_entries[i]; | |
108 | osi->enable = false; | |
109 | } | |
110 | return; | |
111 | } else if (*str == '!') { | |
112 | osi_config.default_disabling = 0; | |
113 | return; | |
114 | } | |
115 | enable = false; | |
116 | } | |
117 | ||
118 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
119 | osi = &osi_setup_entries[i]; | |
120 | if (!strcmp(osi->string, str)) { | |
121 | osi->enable = enable; | |
122 | break; | |
123 | } else if (osi->string[0] == '\0') { | |
124 | osi->enable = enable; | |
125 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
126 | break; | |
127 | } | |
128 | } | |
129 | } | |
130 | ||
131 | static void __init __acpi_osi_setup_darwin(bool enable) | |
132 | { | |
133 | osi_config.darwin_enable = !!enable; | |
134 | if (enable) { | |
135 | acpi_osi_setup("!"); | |
136 | acpi_osi_setup("Darwin"); | |
137 | } else { | |
138 | acpi_osi_setup("!!"); | |
139 | acpi_osi_setup("!Darwin"); | |
140 | } | |
141 | } | |
142 | ||
143 | static void __init acpi_osi_setup_darwin(bool enable) | |
144 | { | |
145 | /* Override acpi_osi_dmi_blacklisted() */ | |
146 | osi_config.darwin_dmi = 0; | |
147 | osi_config.darwin_cmdline = 1; | |
148 | __acpi_osi_setup_darwin(enable); | |
149 | } | |
150 | ||
151 | /* | |
152 | * The story of _OSI(Linux) | |
153 | * | |
154 | * From pre-history through Linux-2.6.22, Linux responded TRUE upon a BIOS | |
155 | * OSI(Linux) query. | |
156 | * | |
157 | * Unfortunately, reference BIOS writers got wind of this and put | |
158 | * OSI(Linux) in their example code, quickly exposing this string as | |
159 | * ill-conceived and opening the door to an un-bounded number of BIOS | |
160 | * incompatibilities. | |
161 | * | |
162 | * For example, OSI(Linux) was used on resume to re-POST a video card on | |
163 | * one system, because Linux at that time could not do a speedy restore in | |
164 | * its native driver. But then upon gaining quick native restore | |
165 | * capability, Linux has no way to tell the BIOS to skip the time-consuming | |
166 | * POST -- putting Linux at a permanent performance disadvantage. On | |
167 | * another system, the BIOS writer used OSI(Linux) to infer native OS | |
168 | * support for IPMI! On other systems, OSI(Linux) simply got in the way of | |
169 | * Linux claiming to be compatible with other operating systems, exposing | |
170 | * BIOS issues such as skipped device initialization. | |
171 | * | |
172 | * So "Linux" turned out to be a really poor chose of OSI string, and from | |
173 | * Linux-2.6.23 onward we respond FALSE. | |
174 | * | |
175 | * BIOS writers should NOT query _OSI(Linux) on future systems. Linux will | |
176 | * complain on the console when it sees it, and return FALSE. To get Linux | |
177 | * to return TRUE for your system will require a kernel source update to | |
178 | * add a DMI entry, or boot with "acpi_osi=Linux" | |
179 | */ | |
180 | static void __init __acpi_osi_setup_linux(bool enable) | |
181 | { | |
182 | osi_config.linux_enable = !!enable; | |
183 | if (enable) | |
184 | acpi_osi_setup("Linux"); | |
185 | else | |
186 | acpi_osi_setup("!Linux"); | |
187 | } | |
188 | ||
189 | static void __init acpi_osi_setup_linux(bool enable) | |
190 | { | |
191 | /* Override acpi_osi_dmi_blacklisted() */ | |
192 | osi_config.linux_dmi = 0; | |
193 | osi_config.linux_cmdline = 1; | |
194 | __acpi_osi_setup_linux(enable); | |
195 | } | |
196 | ||
197 | /* | |
198 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI | |
199 | * | |
200 | * empty string disables _OSI | |
201 | * string starting with '!' disables that string | |
202 | * otherwise string is added to list, augmenting built-in strings | |
203 | */ | |
204 | static void __init acpi_osi_setup_late(void) | |
205 | { | |
206 | struct acpi_osi_entry *osi; | |
207 | char *str; | |
208 | int i; | |
209 | acpi_status status; | |
210 | ||
211 | if (osi_config.default_disabling) { | |
212 | status = acpi_update_interfaces(osi_config.default_disabling); | |
213 | if (ACPI_SUCCESS(status)) | |
214 | pr_info("Disabled all _OSI OS vendors%s\n", | |
215 | osi_config.default_disabling == | |
216 | ACPI_DISABLE_ALL_STRINGS ? | |
217 | " and feature groups" : ""); | |
218 | } | |
219 | ||
220 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
221 | osi = &osi_setup_entries[i]; | |
222 | str = osi->string; | |
223 | if (*str == '\0') | |
224 | break; | |
225 | if (osi->enable) { | |
226 | status = acpi_install_interface(str); | |
227 | if (ACPI_SUCCESS(status)) | |
228 | pr_info("Added _OSI(%s)\n", str); | |
229 | } else { | |
230 | status = acpi_remove_interface(str); | |
231 | if (ACPI_SUCCESS(status)) | |
232 | pr_info("Deleted _OSI(%s)\n", str); | |
233 | } | |
234 | } | |
235 | } | |
236 | ||
237 | static int __init osi_setup(char *str) | |
238 | { | |
239 | if (str && !strcmp("Linux", str)) | |
240 | acpi_osi_setup_linux(true); | |
241 | else if (str && !strcmp("!Linux", str)) | |
242 | acpi_osi_setup_linux(false); | |
243 | else if (str && !strcmp("Darwin", str)) | |
244 | acpi_osi_setup_darwin(true); | |
245 | else if (str && !strcmp("!Darwin", str)) | |
246 | acpi_osi_setup_darwin(false); | |
247 | else | |
248 | acpi_osi_setup(str); | |
249 | ||
250 | return 1; | |
251 | } | |
252 | __setup("acpi_osi=", osi_setup); | |
253 | ||
254 | bool acpi_osi_is_win8(void) | |
255 | { | |
256 | return acpi_gbl_osi_data >= ACPI_OSI_WIN_8; | |
257 | } | |
258 | EXPORT_SYMBOL(acpi_osi_is_win8); | |
259 | ||
260 | static void __init acpi_osi_dmi_darwin(bool enable, | |
261 | const struct dmi_system_id *d) | |
262 | { | |
263 | pr_notice("DMI detected to setup _OSI(\"Darwin\"): %s\n", d->ident); | |
264 | osi_config.darwin_dmi = 1; | |
265 | __acpi_osi_setup_darwin(enable); | |
266 | } | |
267 | ||
268 | void __init acpi_osi_dmi_linux(bool enable, const struct dmi_system_id *d) | |
269 | { | |
270 | pr_notice("DMI detected to setup _OSI(\"Linux\"): %s\n", d->ident); | |
271 | osi_config.linux_dmi = 1; | |
272 | __acpi_osi_setup_linux(enable); | |
273 | } | |
274 | ||
275 | static int __init dmi_enable_osi_darwin(const struct dmi_system_id *d) | |
276 | { | |
277 | acpi_osi_dmi_darwin(true, d); | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | static int __init dmi_enable_osi_linux(const struct dmi_system_id *d) | |
283 | { | |
284 | acpi_osi_dmi_linux(true, d); | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | static int __init dmi_disable_osi_vista(const struct dmi_system_id *d) | |
290 | { | |
291 | pr_notice("DMI detected: %s\n", d->ident); | |
292 | acpi_osi_setup("!Windows 2006"); | |
293 | acpi_osi_setup("!Windows 2006 SP1"); | |
294 | acpi_osi_setup("!Windows 2006 SP2"); | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | static int __init dmi_disable_osi_win7(const struct dmi_system_id *d) | |
300 | { | |
301 | pr_notice("DMI detected: %s\n", d->ident); | |
302 | acpi_osi_setup("!Windows 2009"); | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | static int __init dmi_disable_osi_win8(const struct dmi_system_id *d) | |
308 | { | |
309 | pr_notice("DMI detected: %s\n", d->ident); | |
310 | acpi_osi_setup("!Windows 2012"); | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | /* | |
316 | * Linux default _OSI response behavior is determined by this DMI table. | |
317 | * | |
318 | * Note that _OSI("Linux")/_OSI("Darwin") determined here can be overridden | |
319 | * by acpi_osi=!Linux/acpi_osi=!Darwin command line options. | |
320 | */ | |
321 | static struct dmi_system_id acpi_osi_dmi_table[] __initdata = { | |
322 | { | |
323 | .callback = dmi_disable_osi_vista, | |
324 | .ident = "Fujitsu Siemens", | |
325 | .matches = { | |
326 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
327 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"), | |
328 | }, | |
329 | }, | |
330 | { | |
331 | /* | |
332 | * There have a NVIF method in MSI GX723 DSDT need call by Nvidia | |
333 | * driver (e.g. nouveau) when user press brightness hotkey. | |
334 | * Currently, nouveau driver didn't do the job and it causes there | |
335 | * have a infinite while loop in DSDT when user press hotkey. | |
336 | * We add MSI GX723's dmi information to this table for workaround | |
337 | * this issue. | |
338 | * Will remove MSI GX723 from the table after nouveau grows support. | |
339 | */ | |
340 | .callback = dmi_disable_osi_vista, | |
341 | .ident = "MSI GX723", | |
342 | .matches = { | |
343 | DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"), | |
344 | DMI_MATCH(DMI_PRODUCT_NAME, "GX723"), | |
345 | }, | |
346 | }, | |
347 | { | |
348 | .callback = dmi_disable_osi_vista, | |
349 | .ident = "Sony VGN-NS10J_S", | |
350 | .matches = { | |
351 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
352 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"), | |
353 | }, | |
354 | }, | |
355 | { | |
356 | .callback = dmi_disable_osi_vista, | |
357 | .ident = "Sony VGN-SR290J", | |
358 | .matches = { | |
359 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
360 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR290J"), | |
361 | }, | |
362 | }, | |
363 | { | |
364 | .callback = dmi_disable_osi_vista, | |
365 | .ident = "VGN-NS50B_L", | |
366 | .matches = { | |
367 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
368 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS50B_L"), | |
369 | }, | |
370 | }, | |
371 | { | |
372 | .callback = dmi_disable_osi_vista, | |
373 | .ident = "VGN-SR19XN", | |
374 | .matches = { | |
375 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
376 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR19XN"), | |
377 | }, | |
378 | }, | |
379 | { | |
380 | .callback = dmi_disable_osi_vista, | |
381 | .ident = "Toshiba Satellite L355", | |
382 | .matches = { | |
383 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
384 | DMI_MATCH(DMI_PRODUCT_VERSION, "Satellite L355"), | |
385 | }, | |
386 | }, | |
387 | { | |
388 | .callback = dmi_disable_osi_win7, | |
389 | .ident = "ASUS K50IJ", | |
390 | .matches = { | |
391 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
392 | DMI_MATCH(DMI_PRODUCT_NAME, "K50IJ"), | |
393 | }, | |
394 | }, | |
395 | { | |
396 | .callback = dmi_disable_osi_vista, | |
397 | .ident = "Toshiba P305D", | |
398 | .matches = { | |
399 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
400 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P305D"), | |
401 | }, | |
402 | }, | |
403 | { | |
404 | .callback = dmi_disable_osi_vista, | |
405 | .ident = "Toshiba NB100", | |
406 | .matches = { | |
407 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
408 | DMI_MATCH(DMI_PRODUCT_NAME, "NB100"), | |
409 | }, | |
410 | }, | |
411 | ||
412 | /* | |
413 | * The wireless hotkey does not work on those machines when | |
414 | * returning true for _OSI("Windows 2012") | |
415 | */ | |
416 | { | |
417 | .callback = dmi_disable_osi_win8, | |
418 | .ident = "Dell Inspiron 7737", | |
419 | .matches = { | |
420 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
421 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7737"), | |
422 | }, | |
423 | }, | |
424 | { | |
425 | .callback = dmi_disable_osi_win8, | |
426 | .ident = "Dell Inspiron 7537", | |
427 | .matches = { | |
428 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
429 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7537"), | |
430 | }, | |
431 | }, | |
432 | { | |
433 | .callback = dmi_disable_osi_win8, | |
434 | .ident = "Dell Inspiron 5437", | |
435 | .matches = { | |
436 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
437 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5437"), | |
438 | }, | |
439 | }, | |
440 | { | |
441 | .callback = dmi_disable_osi_win8, | |
442 | .ident = "Dell Inspiron 3437", | |
443 | .matches = { | |
444 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
445 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 3437"), | |
446 | }, | |
447 | }, | |
448 | { | |
449 | .callback = dmi_disable_osi_win8, | |
450 | .ident = "Dell Vostro 3446", | |
451 | .matches = { | |
452 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
453 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3446"), | |
454 | }, | |
455 | }, | |
456 | { | |
457 | .callback = dmi_disable_osi_win8, | |
458 | .ident = "Dell Vostro 3546", | |
459 | .matches = { | |
460 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
461 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3546"), | |
462 | }, | |
463 | }, | |
464 | ||
465 | /* | |
466 | * BIOS invocation of _OSI(Linux) is almost always a BIOS bug. | |
467 | * Linux ignores it, except for the machines enumerated below. | |
468 | */ | |
469 | ||
470 | /* | |
471 | * Without this this EEEpc exports a non working WMI interface, with | |
472 | * this it exports a working "good old" eeepc_laptop interface, fixing | |
473 | * both brightness control, and rfkill not working. | |
474 | */ | |
475 | { | |
476 | .callback = dmi_enable_osi_linux, | |
477 | .ident = "Asus EEE PC 1015PX", | |
478 | .matches = { | |
479 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."), | |
480 | DMI_MATCH(DMI_PRODUCT_NAME, "1015PX"), | |
481 | }, | |
482 | }, | |
483 | ||
484 | /* | |
485 | * Enable _OSI("Darwin") for all apple platforms. | |
486 | */ | |
487 | { | |
488 | .callback = dmi_enable_osi_darwin, | |
489 | .ident = "Apple hardware", | |
490 | .matches = { | |
491 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
492 | }, | |
493 | }, | |
494 | { | |
495 | .callback = dmi_enable_osi_darwin, | |
496 | .ident = "Apple hardware", | |
497 | .matches = { | |
498 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."), | |
499 | }, | |
500 | }, | |
501 | {} | |
502 | }; | |
503 | ||
504 | static __init void acpi_osi_dmi_blacklisted(void) | |
505 | { | |
506 | dmi_check_system(acpi_osi_dmi_table); | |
507 | } | |
508 | ||
509 | int __init early_acpi_osi_init(void) | |
510 | { | |
511 | acpi_osi_dmi_blacklisted(); | |
512 | ||
513 | return 0; | |
514 | } | |
515 | ||
516 | int __init acpi_osi_init(void) | |
517 | { | |
518 | acpi_install_interface_handler(acpi_osi_handler); | |
519 | acpi_osi_setup_late(); | |
520 | ||
521 | return 0; | |
522 | } |