Lv Zheng | e5f660e | 2016-05-03 16:49:01 +0800 | [diff] [blame] | 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 | } |