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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/acpi.h>
33#include <acpi/acpi_bus.h>
34#include <linux/dmi.h>
35
Len Brown4be44fc2005-08-05 00:44:28 -040036enum acpi_blacklist_predicates {
37 all_versions,
38 less_than_or_equal,
39 equal,
40 greater_than_or_equal,
Linus Torvalds1da177e2005-04-16 15:20:36 -070041};
42
Len Brown4be44fc2005-08-05 00:44:28 -040043struct acpi_blacklist_item {
44 char oem_id[7];
45 char oem_table_id[9];
46 u32 oem_revision;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +030047 char *table;
Len Brown4be44fc2005-08-05 00:44:28 -040048 enum acpi_blacklist_predicates oem_revision_predicate;
49 char *reason;
50 u32 is_critical_error;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051};
52
53/*
54 * POLICY: If *anything* doesn't work, put it on the blacklist.
55 * If they are critical errors, mark it critical, and abort driver load.
56 */
Len Brown4be44fc2005-08-05 00:44:28 -040057static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 /* Compaq Presario 1700 */
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +030059 {"PTLTD ", " DSDT ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
Len Brown4be44fc2005-08-05 00:44:28 -040060 "Multiple problems", 1},
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 /* Sony FX120, FX140, FX150? */
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +030062 {"SONY ", "U0 ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
Len Brown4be44fc2005-08-05 00:44:28 -040063 "ACPI driver problem", 1},
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 /* Compaq Presario 800, Insyde BIOS */
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +030065 {"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
Len Brown4be44fc2005-08-05 00:44:28 -040066 "Does not use _REG to protect EC OpRegions", 1},
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 /* IBM 600E - _ADR should return 7, but it returns 1 */
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +030068 {"IBM ", "TP600E ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
Len Brown4be44fc2005-08-05 00:44:28 -040069 "Incorrect _ADR", 1},
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +030070 {"ASUS\0\0", "P2B-S ", 0, ACPI_SIG_DSDT, all_versions,
Len Brown4be44fc2005-08-05 00:44:28 -040071 "Bogus PCI routing", 1},
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73 {""}
74};
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#if CONFIG_ACPI_BLACKLIST_YEAR
77
Len Brown4be44fc2005-08-05 00:44:28 -040078static int __init blacklist_by_year(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079{
Andi Kleenf083a322006-03-25 16:30:19 +010080 int year = dmi_get_year(DMI_BIOS_DATE);
81 /* Doesn't exist? Likely an old system */
82 if (year == -1)
83 return 1;
84 /* 0? Likely a buggy new BIOS */
85 if (year == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
Len Brown4be44fc2005-08-05 00:44:28 -040088 printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
89 "acpi=force is required to enable ACPI\n",
90 year, CONFIG_ACPI_BLACKLIST_YEAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 return 1;
92 }
93 return 0;
94}
95#else
Len Brown4be44fc2005-08-05 00:44:28 -040096static inline int blacklist_by_year(void)
97{
98 return 0;
99}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#endif
101
Len Brown4be44fc2005-08-05 00:44:28 -0400102int __init acpi_blacklisted(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103{
104 int i = 0;
105 int blacklisted = 0;
106 struct acpi_table_header *table_header;
107
Len Brown4be44fc2005-08-05 00:44:28 -0400108 while (acpi_blacklist[i].oem_id[0] != '\0') {
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300109 if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 i++;
111 continue;
112 }
113
114 if (strncmp(acpi_blacklist[i].oem_id, table_header->oem_id, 6)) {
115 i++;
116 continue;
117 }
118
Len Brown4be44fc2005-08-05 00:44:28 -0400119 if (strncmp
120 (acpi_blacklist[i].oem_table_id, table_header->oem_table_id,
121 8)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 i++;
123 continue;
124 }
125
126 if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
Len Brown4be44fc2005-08-05 00:44:28 -0400127 || (acpi_blacklist[i].oem_revision_predicate ==
128 less_than_or_equal
129 && table_header->oem_revision <=
130 acpi_blacklist[i].oem_revision)
131 || (acpi_blacklist[i].oem_revision_predicate ==
132 greater_than_or_equal
133 && table_header->oem_revision >=
134 acpi_blacklist[i].oem_revision)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 || (acpi_blacklist[i].oem_revision_predicate == equal
Len Brown4be44fc2005-08-05 00:44:28 -0400136 && table_header->oem_revision ==
137 acpi_blacklist[i].oem_revision)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Len Brown4be44fc2005-08-05 00:44:28 -0400139 printk(KERN_ERR PREFIX
140 "Vendor \"%6.6s\" System \"%8.8s\" "
141 "Revision 0x%x has a known ACPI BIOS problem.\n",
142 acpi_blacklist[i].oem_id,
143 acpi_blacklist[i].oem_table_id,
144 acpi_blacklist[i].oem_revision);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Len Brown4be44fc2005-08-05 00:44:28 -0400146 printk(KERN_ERR PREFIX
147 "Reason: %s. This is a %s error\n",
148 acpi_blacklist[i].reason,
149 (acpi_blacklist[i].
150 is_critical_error ? "non-recoverable" :
151 "recoverable"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
153 blacklisted = acpi_blacklist[i].is_critical_error;
154 break;
Len Brown4be44fc2005-08-05 00:44:28 -0400155 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 i++;
157 }
158 }
159
160 blacklisted += blacklist_by_year();
161
162 return blacklisted;
163}