drivers/acpi/blacklist.c

   1 /*
   2  *  blacklist.c
   3  *
   4  *  Check to see if the given machine has a known bad ACPI BIOS
   5  *  or if the BIOS is too old.
   6  *
   7  *  Copyright (C) 2004 Len Brown <len.brown@intel.com>
   8  *  Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
   9  *
  10  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or (at
  15  *  your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful, but
  18  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  *  General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License along
  23  *  with this program; if not, write to the Free Software Foundation, Inc.,
  24  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  25  *
  26  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  27  */
  28
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/acpi.h>
  34 #include <acpi/acpi_bus.h>
  35 #include <linux/dmi.h>
  36
  37 enum acpi_blacklist_predicates
  38 {
  39         all_versions,
  40         less_than_or_equal,
  41         equal,
  42         greater_than_or_equal,
  43 };
  44
  45 struct acpi_blacklist_item
  46 {
  47         char            oem_id[7];
  48         char            oem_table_id[9];
  49         u32             oem_revision;
  50         acpi_table_type table;
  51         enum acpi_blacklist_predicates oem_revision_predicate;
  52         char            *reason;
  53         u32             is_critical_error;
  54 };
  55
  56 /*
  57  * POLICY: If *anything* doesn't work, put it on the blacklist.
  58  *         If they are critical errors, mark it critical, and abort driver load.
  59  */
  60 static struct acpi_blacklist_item acpi_blacklist[] __initdata =
  61 {
  62         /* Compaq Presario 1700 */
  63         {"PTLTD ", "  DSDT  ", 0x06040000, ACPI_DSDT, less_than_or_equal, "Multiple problems", 1},
  64         /* Sony FX120, FX140, FX150? */
  65         {"SONY  ", "U0      ", 0x20010313, ACPI_DSDT, less_than_or_equal, "ACPI driver problem", 1},
  66         /* Compaq Presario 800, Insyde BIOS */
  67         {"INT440", "SYSFexxx", 0x00001001, ACPI_DSDT, less_than_or_equal, "Does not use _REG to protect EC OpRegions", 1},
  68         /* IBM 600E - _ADR should return 7, but it returns 1 */
  69         {"IBM   ", "TP600E  ", 0x00000105, ACPI_DSDT, less_than_or_equal, "Incorrect _ADR", 1},
  70         {"ASUS\0\0", "P2B-S   ", 0, ACPI_DSDT, all_versions, "Bogus PCI routing", 1},
  71
  72         {""}
  73 };
  74
  75
  76 #if     CONFIG_ACPI_BLACKLIST_YEAR
  77
  78 static int __init
  79 blacklist_by_year(void)
  80 {
  81         int year;
  82         char *s = dmi_get_system_info(DMI_BIOS_DATE);
  83
  84         if (!s)
  85                 return 0;
  86         if (!*s)
  87                 return 0;
  88
  89         s = strrchr(s, '/');
  90         if (!s)
  91                 return 0;
  92
  93         s += 1;
  94
  95         year = simple_strtoul(s,NULL,0);
  96
  97         if (year < 100) {               /* 2-digit year */
  98                 year += 1900;
  99                 if (year < 1996)        /* no dates < spec 1.0 */
 100                         year += 100;
 101         }
 102
 103         if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
 104                 printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
 105                         "acpi=force is required to enable ACPI\n",
 106                         year, CONFIG_ACPI_BLACKLIST_YEAR);
 107                 return 1;
 108         }
 109         return 0;
 110 }
 111 #else
 112 static inline int blacklist_by_year(void) { return 0; }
 113 #endif
 114
 115 int __init
 116 acpi_blacklisted(void)
 117 {
 118         int i = 0;
 119         int blacklisted = 0;
 120         struct acpi_table_header *table_header;
 121
 122         while (acpi_blacklist[i].oem_id[0] != '\0')
 123         {
 124                 if (acpi_get_table_header_early(acpi_blacklist[i].table, &table_header)) {
 125                         i++;
 126                         continue;
 127                 }
 128
 129                 if (strncmp(acpi_blacklist[i].oem_id, table_header->oem_id, 6)) {
 130                         i++;
 131                         continue;
 132                 }
 133
 134                 if (strncmp(acpi_blacklist[i].oem_table_id, table_header->oem_table_id, 8)) {
 135                         i++;
 136                         continue;
 137                 }
 138
 139                 if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
 140                     || (acpi_blacklist[i].oem_revision_predicate == less_than_or_equal
 141                         && table_header->oem_revision <= acpi_blacklist[i].oem_revision)
 142                     || (acpi_blacklist[i].oem_revision_predicate == greater_than_or_equal
 143                         && table_header->oem_revision >= acpi_blacklist[i].oem_revision)
 144                     || (acpi_blacklist[i].oem_revision_predicate == equal
 145                         && table_header->oem_revision == acpi_blacklist[i].oem_revision)) {
 146
 147                         printk(KERN_ERR PREFIX "Vendor \"%6.6s\" System \"%8.8s\" "
 148                                 "Revision 0x%x has a known ACPI BIOS problem.\n",
 149                                 acpi_blacklist[i].oem_id,
 150                                 acpi_blacklist[i].oem_table_id,
 151                                 acpi_blacklist[i].oem_revision);
 152
 153                         printk(KERN_ERR PREFIX "Reason: %s. This is a %s error\n",
 154                                 acpi_blacklist[i].reason,
 155                                 (acpi_blacklist[i].is_critical_error ? "non-recoverable" : "recoverable"));
 156
 157                         blacklisted = acpi_blacklist[i].is_critical_error;
 158                         break;
 159                 }
 160                 else {
 161                         i++;
 162                 }
 163         }
 164
 165         blacklisted += blacklist_by_year();
 166
 167         return blacklisted;
 168 }
 169