drivers/acpi/osi.c

   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 #include <linux/platform_data/x86/apple.h>
  31
  32 #include "internal.h"
  33
  34
  35 #define OSI_STRING_LENGTH_MAX   64
  36 #define OSI_STRING_ENTRIES_MAX  16
  37
  38 struct acpi_osi_entry {
  39         char string[OSI_STRING_LENGTH_MAX];
  40         bool enable;
  41 };
  42
  43 static struct acpi_osi_config {
  44         u8              default_disabling;
  45         unsigned int    linux_enable:1;
  46         unsigned int    linux_dmi:1;
  47         unsigned int    linux_cmdline:1;
  48         unsigned int    darwin_enable:1;
  49         unsigned int    darwin_dmi:1;
  50         unsigned int    darwin_cmdline:1;
  51 } osi_config;
  52
  53 static struct acpi_osi_config osi_config;
  54 static struct acpi_osi_entry
  55 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
  56         {"Module Device", true},
  57         {"Processor Device", true},
  58         {"3.0 _SCP Extensions", true},
  59         {"Processor Aggregator Device", true},
  60         /*
  61          * Linux-Dell-Video is used by BIOS to disable RTD3 for NVidia graphics
  62          * cards as RTD3 is not supported by drivers now.  Systems with NVidia
  63          * cards will hang without RTD3 disabled.
  64          *
  65          * Once NVidia drivers officially support RTD3, this _OSI strings can
  66          * be removed if both new and old graphics cards are supported.
  67          */
  68         {"Linux-Dell-Video", true},
  69         /*
  70          * Linux-Lenovo-NV-HDMI-Audio is used by BIOS to power on NVidia's HDMI
  71          * audio device which is turned off for power-saving in Windows OS.
  72          * This power management feature observed on some Lenovo Thinkpad
  73          * systems which will not be able to output audio via HDMI without
  74          * a BIOS workaround.
  75          */
  76         {"Linux-Lenovo-NV-HDMI-Audio", true},
  77         /*
  78          * Linux-HPI-Hybrid-Graphics is used by BIOS to enable dGPU to
  79          * output video directly to external monitors on HP Inc. mobile
  80          * workstations as Nvidia and AMD VGA drivers provide limited
  81          * hybrid graphics supports.
  82          */
  83         {"Linux-HPI-Hybrid-Graphics", true},
  84 };
  85
  86 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
  87 {
  88         if (!strcmp("Linux", interface)) {
  89                 pr_notice_once(FW_BUG
  90                         "BIOS _OSI(Linux) query %s%s\n",
  91                         osi_config.linux_enable ? "honored" : "ignored",
  92                         osi_config.linux_cmdline ? " via cmdline" :
  93                         osi_config.linux_dmi ? " via DMI" : "");
  94         }
  95         if (!strcmp("Darwin", interface)) {
  96                 pr_notice_once(
  97                         "BIOS _OSI(Darwin) query %s%s\n",
  98                         osi_config.darwin_enable ? "honored" : "ignored",
  99                         osi_config.darwin_cmdline ? " via cmdline" :
 100                         osi_config.darwin_dmi ? " via DMI" : "");
 101         }
 102
 103         return supported;
 104 }
 105
 106 void __init acpi_osi_setup(char *str)
 107 {
 108         struct acpi_osi_entry *osi;
 109         bool enable = true;
 110         int i;
 111
 112         if (!acpi_gbl_create_osi_method)
 113                 return;
 114
 115         if (str == NULL || *str == '\0') {
 116                 pr_info("_OSI method disabled\n");
 117                 acpi_gbl_create_osi_method = FALSE;
 118                 return;
 119         }
 120
 121         if (*str == '!') {
 122                 str++;
 123                 if (*str == '\0') {
 124                         /* Do not override acpi_osi=!* */
 125                         if (!osi_config.default_disabling)
 126                                 osi_config.default_disabling =
 127                                         ACPI_DISABLE_ALL_VENDOR_STRINGS;
 128                         return;
 129                 } else if (*str == '*') {
 130                         osi_config.default_disabling = ACPI_DISABLE_ALL_STRINGS;
 131                         for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
 132                                 osi = &osi_setup_entries[i];
 133                                 osi->enable = false;
 134                         }
 135                         return;
 136                 } else if (*str == '!') {
 137                         osi_config.default_disabling = 0;
 138                         return;
 139                 }
 140                 enable = false;
 141         }
 142
 143         for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
 144                 osi = &osi_setup_entries[i];
 145                 if (!strcmp(osi->string, str)) {
 146                         osi->enable = enable;
 147                         break;
 148                 } else if (osi->string[0] == '\0') {
 149                         osi->enable = enable;
 150                         strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
 151                         break;
 152                 }
 153         }
 154 }
 155
 156 static void __init __acpi_osi_setup_darwin(bool enable)
 157 {
 158         osi_config.darwin_enable = !!enable;
 159         if (enable) {
 160                 acpi_osi_setup("!");
 161                 acpi_osi_setup("Darwin");
 162         } else {
 163                 acpi_osi_setup("!!");
 164                 acpi_osi_setup("!Darwin");
 165         }
 166 }
 167
 168 static void __init acpi_osi_setup_darwin(bool enable)
 169 {
 170         /* Override acpi_osi_dmi_blacklisted() */
 171         osi_config.darwin_dmi = 0;
 172         osi_config.darwin_cmdline = 1;
 173         __acpi_osi_setup_darwin(enable);
 174 }
 175
 176 /*
 177  * The story of _OSI(Linux)
 178  *
 179  * From pre-history through Linux-2.6.22, Linux responded TRUE upon a BIOS
 180  * OSI(Linux) query.
 181  *
 182  * Unfortunately, reference BIOS writers got wind of this and put
 183  * OSI(Linux) in their example code, quickly exposing this string as
 184  * ill-conceived and opening the door to an un-bounded number of BIOS
 185  * incompatibilities.
 186  *
 187  * For example, OSI(Linux) was used on resume to re-POST a video card on
 188  * one system, because Linux at that time could not do a speedy restore in
 189  * its native driver. But then upon gaining quick native restore
 190  * capability, Linux has no way to tell the BIOS to skip the time-consuming
 191  * POST -- putting Linux at a permanent performance disadvantage. On
 192  * another system, the BIOS writer used OSI(Linux) to infer native OS
 193  * support for IPMI!  On other systems, OSI(Linux) simply got in the way of
 194  * Linux claiming to be compatible with other operating systems, exposing
 195  * BIOS issues such as skipped device initialization.
 196  *
 197  * So "Linux" turned out to be a really poor chose of OSI string, and from
 198  * Linux-2.6.23 onward we respond FALSE.
 199  *
 200  * BIOS writers should NOT query _OSI(Linux) on future systems. Linux will
 201  * complain on the console when it sees it, and return FALSE. To get Linux
 202  * to return TRUE for your system  will require a kernel source update to
 203  * add a DMI entry, or boot with "acpi_osi=Linux"
 204  */
 205 static void __init __acpi_osi_setup_linux(bool enable)
 206 {
 207         osi_config.linux_enable = !!enable;
 208         if (enable)
 209                 acpi_osi_setup("Linux");
 210         else
 211                 acpi_osi_setup("!Linux");
 212 }
 213
 214 static void __init acpi_osi_setup_linux(bool enable)
 215 {
 216         /* Override acpi_osi_dmi_blacklisted() */
 217         osi_config.linux_dmi = 0;
 218         osi_config.linux_cmdline = 1;
 219         __acpi_osi_setup_linux(enable);
 220 }
 221
 222 /*
 223  * Modify the list of "OS Interfaces" reported to BIOS via _OSI
 224  *
 225  * empty string disables _OSI
 226  * string starting with '!' disables that string
 227  * otherwise string is added to list, augmenting built-in strings
 228  */
 229 static void __init acpi_osi_setup_late(void)
 230 {
 231         struct acpi_osi_entry *osi;
 232         char *str;
 233         int i;
 234         acpi_status status;
 235
 236         if (osi_config.default_disabling) {
 237                 status = acpi_update_interfaces(osi_config.default_disabling);
 238                 if (ACPI_SUCCESS(status))
 239                         pr_info("Disabled all _OSI OS vendors%s\n",
 240                                 osi_config.default_disabling ==
 241                                 ACPI_DISABLE_ALL_STRINGS ?
 242                                 " and feature groups" : "");
 243         }
 244
 245         for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
 246                 osi = &osi_setup_entries[i];
 247                 str = osi->string;
 248                 if (*str == '\0')
 249                         break;
 250                 if (osi->enable) {
 251                         status = acpi_install_interface(str);
 252                         if (ACPI_SUCCESS(status))
 253                                 pr_info("Added _OSI(%s)\n", str);
 254                 } else {
 255                         status = acpi_remove_interface(str);
 256                         if (ACPI_SUCCESS(status))
 257                                 pr_info("Deleted _OSI(%s)\n", str);
 258                 }
 259         }
 260 }
 261
 262 static int __init osi_setup(char *str)
 263 {
 264         if (str && !strcmp("Linux", str))
 265                 acpi_osi_setup_linux(true);
 266         else if (str && !strcmp("!Linux", str))
 267                 acpi_osi_setup_linux(false);
 268         else if (str && !strcmp("Darwin", str))
 269                 acpi_osi_setup_darwin(true);
 270         else if (str && !strcmp("!Darwin", str))
 271                 acpi_osi_setup_darwin(false);
 272         else
 273                 acpi_osi_setup(str);
 274
 275         return 1;
 276 }
 277 __setup("acpi_osi=", osi_setup);
 278
 279 bool acpi_osi_is_win8(void)
 280 {
 281         return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
 282 }
 283 EXPORT_SYMBOL(acpi_osi_is_win8);
 284
 285 static void __init acpi_osi_dmi_darwin(void)
 286 {
 287         pr_notice("DMI detected to setup _OSI(\"Darwin\"): Apple hardware\n");
 288         osi_config.darwin_dmi = 1;
 289         __acpi_osi_setup_darwin(true);
 290 }
 291
 292 static void __init acpi_osi_dmi_linux(bool enable,
 293                                       const struct dmi_system_id *d)
 294 {
 295         pr_notice("DMI detected to setup _OSI(\"Linux\"): %s\n", d->ident);
 296         osi_config.linux_dmi = 1;
 297         __acpi_osi_setup_linux(enable);
 298 }
 299
 300 static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
 301 {
 302         acpi_osi_dmi_linux(true, d);
 303
 304         return 0;
 305 }
 306
 307 static int __init dmi_disable_osi_vista(const struct dmi_system_id *d)
 308 {
 309         pr_notice("DMI detected: %s\n", d->ident);
 310         acpi_osi_setup("!Windows 2006");
 311         acpi_osi_setup("!Windows 2006 SP1");
 312         acpi_osi_setup("!Windows 2006 SP2");
 313
 314         return 0;
 315 }
 316
 317 static int __init dmi_disable_osi_win7(const struct dmi_system_id *d)
 318 {
 319         pr_notice("DMI detected: %s\n", d->ident);
 320         acpi_osi_setup("!Windows 2009");
 321
 322         return 0;
 323 }
 324
 325 static int __init dmi_disable_osi_win8(const struct dmi_system_id *d)
 326 {
 327         pr_notice("DMI detected: %s\n", d->ident);
 328         acpi_osi_setup("!Windows 2012");
 329
 330         return 0;
 331 }
 332
 333 /*
 334  * Linux default _OSI response behavior is determined by this DMI table.
 335  *
 336  * Note that _OSI("Linux")/_OSI("Darwin") determined here can be overridden
 337  * by acpi_osi=!Linux/acpi_osi=!Darwin command line options.
 338  */
 339 static const struct dmi_system_id acpi_osi_dmi_table[] __initconst = {
 340         {
 341         .callback = dmi_disable_osi_vista,
 342         .ident = "Fujitsu Siemens",
 343         .matches = {
 344                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 345                      DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
 346                 },
 347         },
 348         {
 349         /*
 350          * There have a NVIF method in MSI GX723 DSDT need call by Nvidia
 351          * driver (e.g. nouveau) when user press brightness hotkey.
 352          * Currently, nouveau driver didn't do the job and it causes there
 353          * have a infinite while loop in DSDT when user press hotkey.
 354          * We add MSI GX723's dmi information to this table for workaround
 355          * this issue.
 356          * Will remove MSI GX723 from the table after nouveau grows support.
 357          */
 358         .callback = dmi_disable_osi_vista,
 359         .ident = "MSI GX723",
 360         .matches = {
 361                      DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
 362                      DMI_MATCH(DMI_PRODUCT_NAME, "GX723"),
 363                 },
 364         },
 365         {
 366         .callback = dmi_disable_osi_vista,
 367         .ident = "Sony VGN-NS10J_S",
 368         .matches = {
 369                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
 370                      DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"),
 371                 },
 372         },
 373         {
 374         .callback = dmi_disable_osi_vista,
 375         .ident = "Sony VGN-SR290J",
 376         .matches = {
 377                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
 378                      DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR290J"),
 379                 },
 380         },
 381         {
 382         .callback = dmi_disable_osi_vista,
 383         .ident = "VGN-NS50B_L",
 384         .matches = {
 385                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
 386                      DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS50B_L"),
 387                 },
 388         },
 389         {
 390         .callback = dmi_disable_osi_vista,
 391         .ident = "VGN-SR19XN",
 392         .matches = {
 393                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
 394                      DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR19XN"),
 395                 },
 396         },
 397         {
 398         .callback = dmi_disable_osi_vista,
 399         .ident = "Toshiba Satellite L355",
 400         .matches = {
 401                      DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 402                      DMI_MATCH(DMI_PRODUCT_VERSION, "Satellite L355"),
 403                 },
 404         },
 405         {
 406         .callback = dmi_disable_osi_win7,
 407         .ident = "ASUS K50IJ",
 408         .matches = {
 409                      DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
 410                      DMI_MATCH(DMI_PRODUCT_NAME, "K50IJ"),
 411                 },
 412         },
 413         {
 414         .callback = dmi_disable_osi_vista,
 415         .ident = "Toshiba P305D",
 416         .matches = {
 417                      DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 418                      DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P305D"),
 419                 },
 420         },
 421         {
 422         .callback = dmi_disable_osi_vista,
 423         .ident = "Toshiba NB100",
 424         .matches = {
 425                      DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 426                      DMI_MATCH(DMI_PRODUCT_NAME, "NB100"),
 427                 },
 428         },
 429
 430         /*
 431          * The wireless hotkey does not work on those machines when
 432          * returning true for _OSI("Windows 2012")
 433          */
 434         {
 435         .callback = dmi_disable_osi_win8,
 436         .ident = "Dell Inspiron 7737",
 437         .matches = {
 438                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 439                     DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7737"),
 440                 },
 441         },
 442         {
 443         .callback = dmi_disable_osi_win8,
 444         .ident = "Dell Inspiron 7537",
 445         .matches = {
 446                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 447                     DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7537"),
 448                 },
 449         },
 450         {
 451         .callback = dmi_disable_osi_win8,
 452         .ident = "Dell Inspiron 5437",
 453         .matches = {
 454                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 455                     DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5437"),
 456                 },
 457         },
 458         {
 459         .callback = dmi_disable_osi_win8,
 460         .ident = "Dell Inspiron 3437",
 461         .matches = {
 462                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 463                     DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 3437"),
 464                 },
 465         },
 466         {
 467         .callback = dmi_disable_osi_win8,
 468         .ident = "Dell Vostro 3446",
 469         .matches = {
 470                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 471                     DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3446"),
 472                 },
 473         },
 474         {
 475         .callback = dmi_disable_osi_win8,
 476         .ident = "Dell Vostro 3546",
 477         .matches = {
 478                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 479                     DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3546"),
 480                 },
 481         },
 482
 483         /*
 484          * BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
 485          * Linux ignores it, except for the machines enumerated below.
 486          */
 487
 488         /*
 489          * Without this this EEEpc exports a non working WMI interface, with
 490          * this it exports a working "good old" eeepc_laptop interface, fixing
 491          * both brightness control, and rfkill not working.
 492          */
 493         {
 494         .callback = dmi_enable_osi_linux,
 495         .ident = "Asus EEE PC 1015PX",
 496         .matches = {
 497                      DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
 498                      DMI_MATCH(DMI_PRODUCT_NAME, "1015PX"),
 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         /* Enable _OSI("Darwin") for Apple platforms. */
 509         if (x86_apple_machine)
 510                 acpi_osi_dmi_darwin();
 511 }
 512
 513 int __init early_acpi_osi_init(void)
 514 {
 515         acpi_osi_dmi_blacklisted();
 516
 517         return 0;
 518 }
 519
 520 int __init acpi_osi_init(void)
 521 {
 522         acpi_install_interface_handler(acpi_osi_handler);
 523         acpi_osi_setup_late();
 524
 525         return 0;
 526 }