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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
e5f660eb LZ |
2 | /* |
3 | * osi.c - _OSI implementation | |
4 | * | |
5 | * Copyright (C) 2016 Intel Corporation | |
6 | * Author: Lv Zheng <lv.zheng@intel.com> | |
e5f660eb LZ |
7 | */ |
8 | ||
9 | /* Uncomment next line to get verbose printout */ | |
10 | /* #define DEBUG */ | |
11 | #define pr_fmt(fmt) "ACPI: " fmt | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/acpi.h> | |
16 | #include <linux/dmi.h> | |
630b3aff | 17 | #include <linux/platform_data/x86/apple.h> |
e5f660eb LZ |
18 | |
19 | #include "internal.h" | |
20 | ||
21 | ||
22 | #define OSI_STRING_LENGTH_MAX 64 | |
23 | #define OSI_STRING_ENTRIES_MAX 16 | |
24 | ||
25 | struct acpi_osi_entry { | |
26 | char string[OSI_STRING_LENGTH_MAX]; | |
27 | bool enable; | |
28 | }; | |
29 | ||
30 | static struct acpi_osi_config { | |
31 | u8 default_disabling; | |
32 | unsigned int linux_enable:1; | |
33 | unsigned int linux_dmi:1; | |
34 | unsigned int linux_cmdline:1; | |
35 | unsigned int darwin_enable:1; | |
36 | unsigned int darwin_dmi:1; | |
37 | unsigned int darwin_cmdline:1; | |
38 | } osi_config; | |
39 | ||
40 | static struct acpi_osi_config osi_config; | |
41 | static struct acpi_osi_entry | |
42 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { | |
43 | {"Module Device", true}, | |
44 | {"Processor Device", true}, | |
45 | {"3.0 _SCP Extensions", true}, | |
46 | {"Processor Aggregator Device", true}, | |
47 | }; | |
48 | ||
49 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) | |
50 | { | |
51 | if (!strcmp("Linux", interface)) { | |
52 | pr_notice_once(FW_BUG | |
53 | "BIOS _OSI(Linux) query %s%s\n", | |
54 | osi_config.linux_enable ? "honored" : "ignored", | |
55 | osi_config.linux_cmdline ? " via cmdline" : | |
56 | osi_config.linux_dmi ? " via DMI" : ""); | |
57 | } | |
58 | if (!strcmp("Darwin", interface)) { | |
59 | pr_notice_once( | |
60 | "BIOS _OSI(Darwin) query %s%s\n", | |
61 | osi_config.darwin_enable ? "honored" : "ignored", | |
62 | osi_config.darwin_cmdline ? " via cmdline" : | |
63 | osi_config.darwin_dmi ? " via DMI" : ""); | |
64 | } | |
65 | ||
66 | return supported; | |
67 | } | |
68 | ||
69 | void __init acpi_osi_setup(char *str) | |
70 | { | |
71 | struct acpi_osi_entry *osi; | |
72 | bool enable = true; | |
73 | int i; | |
74 | ||
75 | if (!acpi_gbl_create_osi_method) | |
76 | return; | |
77 | ||
78 | if (str == NULL || *str == '\0') { | |
79 | pr_info("_OSI method disabled\n"); | |
80 | acpi_gbl_create_osi_method = FALSE; | |
81 | return; | |
82 | } | |
83 | ||
84 | if (*str == '!') { | |
85 | str++; | |
86 | if (*str == '\0') { | |
87 | /* Do not override acpi_osi=!* */ | |
88 | if (!osi_config.default_disabling) | |
89 | osi_config.default_disabling = | |
90 | ACPI_DISABLE_ALL_VENDOR_STRINGS; | |
91 | return; | |
92 | } else if (*str == '*') { | |
93 | osi_config.default_disabling = ACPI_DISABLE_ALL_STRINGS; | |
94 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
95 | osi = &osi_setup_entries[i]; | |
96 | osi->enable = false; | |
97 | } | |
98 | return; | |
99 | } else if (*str == '!') { | |
100 | osi_config.default_disabling = 0; | |
101 | return; | |
102 | } | |
103 | enable = false; | |
104 | } | |
105 | ||
106 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
107 | osi = &osi_setup_entries[i]; | |
108 | if (!strcmp(osi->string, str)) { | |
109 | osi->enable = enable; | |
110 | break; | |
111 | } else if (osi->string[0] == '\0') { | |
112 | osi->enable = enable; | |
113 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
114 | break; | |
115 | } | |
116 | } | |
117 | } | |
118 | ||
119 | static void __init __acpi_osi_setup_darwin(bool enable) | |
120 | { | |
121 | osi_config.darwin_enable = !!enable; | |
122 | if (enable) { | |
123 | acpi_osi_setup("!"); | |
124 | acpi_osi_setup("Darwin"); | |
125 | } else { | |
126 | acpi_osi_setup("!!"); | |
127 | acpi_osi_setup("!Darwin"); | |
128 | } | |
129 | } | |
130 | ||
131 | static void __init acpi_osi_setup_darwin(bool enable) | |
132 | { | |
133 | /* Override acpi_osi_dmi_blacklisted() */ | |
134 | osi_config.darwin_dmi = 0; | |
135 | osi_config.darwin_cmdline = 1; | |
136 | __acpi_osi_setup_darwin(enable); | |
137 | } | |
138 | ||
139 | /* | |
140 | * The story of _OSI(Linux) | |
141 | * | |
142 | * From pre-history through Linux-2.6.22, Linux responded TRUE upon a BIOS | |
143 | * OSI(Linux) query. | |
144 | * | |
145 | * Unfortunately, reference BIOS writers got wind of this and put | |
146 | * OSI(Linux) in their example code, quickly exposing this string as | |
147 | * ill-conceived and opening the door to an un-bounded number of BIOS | |
148 | * incompatibilities. | |
149 | * | |
150 | * For example, OSI(Linux) was used on resume to re-POST a video card on | |
151 | * one system, because Linux at that time could not do a speedy restore in | |
152 | * its native driver. But then upon gaining quick native restore | |
153 | * capability, Linux has no way to tell the BIOS to skip the time-consuming | |
154 | * POST -- putting Linux at a permanent performance disadvantage. On | |
155 | * another system, the BIOS writer used OSI(Linux) to infer native OS | |
156 | * support for IPMI! On other systems, OSI(Linux) simply got in the way of | |
157 | * Linux claiming to be compatible with other operating systems, exposing | |
158 | * BIOS issues such as skipped device initialization. | |
159 | * | |
160 | * So "Linux" turned out to be a really poor chose of OSI string, and from | |
161 | * Linux-2.6.23 onward we respond FALSE. | |
162 | * | |
163 | * BIOS writers should NOT query _OSI(Linux) on future systems. Linux will | |
164 | * complain on the console when it sees it, and return FALSE. To get Linux | |
165 | * to return TRUE for your system will require a kernel source update to | |
166 | * add a DMI entry, or boot with "acpi_osi=Linux" | |
167 | */ | |
168 | static void __init __acpi_osi_setup_linux(bool enable) | |
169 | { | |
170 | osi_config.linux_enable = !!enable; | |
171 | if (enable) | |
172 | acpi_osi_setup("Linux"); | |
173 | else | |
174 | acpi_osi_setup("!Linux"); | |
175 | } | |
176 | ||
177 | static void __init acpi_osi_setup_linux(bool enable) | |
178 | { | |
179 | /* Override acpi_osi_dmi_blacklisted() */ | |
180 | osi_config.linux_dmi = 0; | |
181 | osi_config.linux_cmdline = 1; | |
182 | __acpi_osi_setup_linux(enable); | |
183 | } | |
184 | ||
185 | /* | |
186 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI | |
187 | * | |
188 | * empty string disables _OSI | |
189 | * string starting with '!' disables that string | |
190 | * otherwise string is added to list, augmenting built-in strings | |
191 | */ | |
192 | static void __init acpi_osi_setup_late(void) | |
193 | { | |
194 | struct acpi_osi_entry *osi; | |
195 | char *str; | |
196 | int i; | |
197 | acpi_status status; | |
198 | ||
199 | if (osi_config.default_disabling) { | |
200 | status = acpi_update_interfaces(osi_config.default_disabling); | |
201 | if (ACPI_SUCCESS(status)) | |
202 | pr_info("Disabled all _OSI OS vendors%s\n", | |
203 | osi_config.default_disabling == | |
204 | ACPI_DISABLE_ALL_STRINGS ? | |
205 | " and feature groups" : ""); | |
206 | } | |
207 | ||
208 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
209 | osi = &osi_setup_entries[i]; | |
210 | str = osi->string; | |
211 | if (*str == '\0') | |
212 | break; | |
213 | if (osi->enable) { | |
214 | status = acpi_install_interface(str); | |
215 | if (ACPI_SUCCESS(status)) | |
216 | pr_info("Added _OSI(%s)\n", str); | |
217 | } else { | |
218 | status = acpi_remove_interface(str); | |
219 | if (ACPI_SUCCESS(status)) | |
220 | pr_info("Deleted _OSI(%s)\n", str); | |
221 | } | |
222 | } | |
223 | } | |
224 | ||
225 | static int __init osi_setup(char *str) | |
226 | { | |
227 | if (str && !strcmp("Linux", str)) | |
228 | acpi_osi_setup_linux(true); | |
229 | else if (str && !strcmp("!Linux", str)) | |
230 | acpi_osi_setup_linux(false); | |
231 | else if (str && !strcmp("Darwin", str)) | |
232 | acpi_osi_setup_darwin(true); | |
233 | else if (str && !strcmp("!Darwin", str)) | |
234 | acpi_osi_setup_darwin(false); | |
235 | else | |
236 | acpi_osi_setup(str); | |
237 | ||
238 | return 1; | |
239 | } | |
240 | __setup("acpi_osi=", osi_setup); | |
241 | ||
242 | bool acpi_osi_is_win8(void) | |
243 | { | |
244 | return acpi_gbl_osi_data >= ACPI_OSI_WIN_8; | |
245 | } | |
246 | EXPORT_SYMBOL(acpi_osi_is_win8); | |
247 | ||
630b3aff | 248 | static void __init acpi_osi_dmi_darwin(void) |
e5f660eb | 249 | { |
630b3aff | 250 | pr_notice("DMI detected to setup _OSI(\"Darwin\"): Apple hardware\n"); |
e5f660eb | 251 | osi_config.darwin_dmi = 1; |
630b3aff | 252 | __acpi_osi_setup_darwin(true); |
e5f660eb LZ |
253 | } |
254 | ||
5438bc57 CIK |
255 | static void __init acpi_osi_dmi_linux(bool enable, |
256 | const struct dmi_system_id *d) | |
e5f660eb LZ |
257 | { |
258 | pr_notice("DMI detected to setup _OSI(\"Linux\"): %s\n", d->ident); | |
259 | osi_config.linux_dmi = 1; | |
260 | __acpi_osi_setup_linux(enable); | |
261 | } | |
262 | ||
e5f660eb LZ |
263 | static int __init dmi_enable_osi_linux(const struct dmi_system_id *d) |
264 | { | |
265 | acpi_osi_dmi_linux(true, d); | |
266 | ||
267 | return 0; | |
268 | } | |
269 | ||
270 | static int __init dmi_disable_osi_vista(const struct dmi_system_id *d) | |
271 | { | |
272 | pr_notice("DMI detected: %s\n", d->ident); | |
273 | acpi_osi_setup("!Windows 2006"); | |
274 | acpi_osi_setup("!Windows 2006 SP1"); | |
275 | acpi_osi_setup("!Windows 2006 SP2"); | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | static int __init dmi_disable_osi_win7(const struct dmi_system_id *d) | |
281 | { | |
282 | pr_notice("DMI detected: %s\n", d->ident); | |
283 | acpi_osi_setup("!Windows 2009"); | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | static int __init dmi_disable_osi_win8(const struct dmi_system_id *d) | |
289 | { | |
290 | pr_notice("DMI detected: %s\n", d->ident); | |
291 | acpi_osi_setup("!Windows 2012"); | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | /* | |
297 | * Linux default _OSI response behavior is determined by this DMI table. | |
298 | * | |
299 | * Note that _OSI("Linux")/_OSI("Darwin") determined here can be overridden | |
300 | * by acpi_osi=!Linux/acpi_osi=!Darwin command line options. | |
301 | */ | |
6faadbbb | 302 | static const struct dmi_system_id acpi_osi_dmi_table[] __initconst = { |
e5f660eb LZ |
303 | { |
304 | .callback = dmi_disable_osi_vista, | |
305 | .ident = "Fujitsu Siemens", | |
306 | .matches = { | |
307 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
308 | DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"), | |
309 | }, | |
310 | }, | |
311 | { | |
312 | /* | |
313 | * There have a NVIF method in MSI GX723 DSDT need call by Nvidia | |
314 | * driver (e.g. nouveau) when user press brightness hotkey. | |
315 | * Currently, nouveau driver didn't do the job and it causes there | |
316 | * have a infinite while loop in DSDT when user press hotkey. | |
317 | * We add MSI GX723's dmi information to this table for workaround | |
318 | * this issue. | |
319 | * Will remove MSI GX723 from the table after nouveau grows support. | |
320 | */ | |
321 | .callback = dmi_disable_osi_vista, | |
322 | .ident = "MSI GX723", | |
323 | .matches = { | |
324 | DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"), | |
325 | DMI_MATCH(DMI_PRODUCT_NAME, "GX723"), | |
326 | }, | |
327 | }, | |
328 | { | |
329 | .callback = dmi_disable_osi_vista, | |
330 | .ident = "Sony VGN-NS10J_S", | |
331 | .matches = { | |
332 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
333 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"), | |
334 | }, | |
335 | }, | |
336 | { | |
337 | .callback = dmi_disable_osi_vista, | |
338 | .ident = "Sony VGN-SR290J", | |
339 | .matches = { | |
340 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
341 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR290J"), | |
342 | }, | |
343 | }, | |
344 | { | |
345 | .callback = dmi_disable_osi_vista, | |
346 | .ident = "VGN-NS50B_L", | |
347 | .matches = { | |
348 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
349 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS50B_L"), | |
350 | }, | |
351 | }, | |
352 | { | |
353 | .callback = dmi_disable_osi_vista, | |
354 | .ident = "VGN-SR19XN", | |
355 | .matches = { | |
356 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
357 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR19XN"), | |
358 | }, | |
359 | }, | |
360 | { | |
361 | .callback = dmi_disable_osi_vista, | |
362 | .ident = "Toshiba Satellite L355", | |
363 | .matches = { | |
364 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
365 | DMI_MATCH(DMI_PRODUCT_VERSION, "Satellite L355"), | |
366 | }, | |
367 | }, | |
368 | { | |
369 | .callback = dmi_disable_osi_win7, | |
370 | .ident = "ASUS K50IJ", | |
371 | .matches = { | |
372 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
373 | DMI_MATCH(DMI_PRODUCT_NAME, "K50IJ"), | |
374 | }, | |
375 | }, | |
376 | { | |
377 | .callback = dmi_disable_osi_vista, | |
378 | .ident = "Toshiba P305D", | |
379 | .matches = { | |
380 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
381 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P305D"), | |
382 | }, | |
383 | }, | |
384 | { | |
385 | .callback = dmi_disable_osi_vista, | |
386 | .ident = "Toshiba NB100", | |
387 | .matches = { | |
388 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
389 | DMI_MATCH(DMI_PRODUCT_NAME, "NB100"), | |
390 | }, | |
391 | }, | |
392 | ||
393 | /* | |
394 | * The wireless hotkey does not work on those machines when | |
395 | * returning true for _OSI("Windows 2012") | |
396 | */ | |
397 | { | |
398 | .callback = dmi_disable_osi_win8, | |
399 | .ident = "Dell Inspiron 7737", | |
400 | .matches = { | |
401 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
402 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7737"), | |
403 | }, | |
404 | }, | |
405 | { | |
406 | .callback = dmi_disable_osi_win8, | |
407 | .ident = "Dell Inspiron 7537", | |
408 | .matches = { | |
409 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
410 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7537"), | |
411 | }, | |
412 | }, | |
413 | { | |
414 | .callback = dmi_disable_osi_win8, | |
415 | .ident = "Dell Inspiron 5437", | |
416 | .matches = { | |
417 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
418 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5437"), | |
419 | }, | |
420 | }, | |
421 | { | |
422 | .callback = dmi_disable_osi_win8, | |
423 | .ident = "Dell Inspiron 3437", | |
424 | .matches = { | |
425 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
426 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 3437"), | |
427 | }, | |
428 | }, | |
429 | { | |
430 | .callback = dmi_disable_osi_win8, | |
431 | .ident = "Dell Vostro 3446", | |
432 | .matches = { | |
433 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
434 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3446"), | |
435 | }, | |
436 | }, | |
437 | { | |
438 | .callback = dmi_disable_osi_win8, | |
439 | .ident = "Dell Vostro 3546", | |
440 | .matches = { | |
441 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
442 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3546"), | |
443 | }, | |
444 | }, | |
445 | ||
446 | /* | |
447 | * BIOS invocation of _OSI(Linux) is almost always a BIOS bug. | |
448 | * Linux ignores it, except for the machines enumerated below. | |
449 | */ | |
450 | ||
451 | /* | |
b4447c0d C |
452 | * Without this EEEpc exports a non working WMI interface, with |
453 | * this it exports a working "good old" eeepc_laptop interface, | |
454 | * fixing both brightness control, and rfkill not working. | |
e5f660eb LZ |
455 | */ |
456 | { | |
457 | .callback = dmi_enable_osi_linux, | |
458 | .ident = "Asus EEE PC 1015PX", | |
459 | .matches = { | |
460 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."), | |
461 | DMI_MATCH(DMI_PRODUCT_NAME, "1015PX"), | |
462 | }, | |
463 | }, | |
e5f660eb LZ |
464 | {} |
465 | }; | |
466 | ||
467 | static __init void acpi_osi_dmi_blacklisted(void) | |
468 | { | |
469 | dmi_check_system(acpi_osi_dmi_table); | |
630b3aff LW |
470 | |
471 | /* Enable _OSI("Darwin") for Apple platforms. */ | |
472 | if (x86_apple_machine) | |
473 | acpi_osi_dmi_darwin(); | |
e5f660eb LZ |
474 | } |
475 | ||
476 | int __init early_acpi_osi_init(void) | |
477 | { | |
478 | acpi_osi_dmi_blacklisted(); | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
483 | int __init acpi_osi_init(void) | |
484 | { | |
485 | acpi_install_interface_handler(acpi_osi_handler); | |
486 | acpi_osi_setup_late(); | |
487 | ||
488 | return 0; | |
489 | } |