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1da177e4 LT |
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 |