tun: Limit amount of queued packets per device
[linux-2.6] / 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  *  Check given machine against acpi_osi_dmi_table[].
7  *
8  *  Copyright (C) 2004 Len Brown <len.brown@intel.com>
9  *  Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
10  *
11  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12  *
13  *  This program is free software; you can redistribute it and/or modify
14  *  it under the terms of the GNU General Public License as published by
15  *  the Free Software Foundation; either version 2 of the License, or (at
16  *  your option) any later version.
17  *
18  *  This program is distributed in the hope that it will be useful, but
19  *  WITHOUT ANY WARRANTY; without even the implied warranty of
20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
21  *  General Public License for more details.
22  *
23  *  You should have received a copy of the GNU General Public License along
24  *  with this program; if not, write to the Free Software Foundation, Inc.,
25  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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         all_versions,
39         less_than_or_equal,
40         equal,
41         greater_than_or_equal,
42 };
43
44 struct acpi_blacklist_item {
45         char oem_id[7];
46         char oem_table_id[9];
47         u32 oem_revision;
48         char *table;
49         enum acpi_blacklist_predicates oem_revision_predicate;
50         char *reason;
51         u32 is_critical_error;
52 };
53
54 static struct dmi_system_id acpi_osi_dmi_table[] __initdata;
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         /* Compaq Presario 1700 */
62         {"PTLTD ", "  DSDT  ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
63          "Multiple problems", 1},
64         /* Sony FX120, FX140, FX150? */
65         {"SONY  ", "U0      ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
66          "ACPI driver problem", 1},
67         /* Compaq Presario 800, Insyde BIOS */
68         {"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
69          "Does not use _REG to protect EC OpRegions", 1},
70         /* IBM 600E - _ADR should return 7, but it returns 1 */
71         {"IBM   ", "TP600E  ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
72          "Incorrect _ADR", 1},
73
74         {""}
75 };
76
77 #if     CONFIG_ACPI_BLACKLIST_YEAR
78
79 static int __init blacklist_by_year(void)
80 {
81         int year = dmi_get_year(DMI_BIOS_DATE);
82         /* Doesn't exist? Likely an old system */
83         if (year == -1) {
84                 printk(KERN_ERR PREFIX "no DMI BIOS year, "
85                         "acpi=force is required to enable ACPI\n" );
86                 return 1;
87         }
88         /* 0? Likely a buggy new BIOS */
89         if (year == 0) {
90                 printk(KERN_ERR PREFIX "DMI BIOS year==0, "
91                         "assuming ACPI-capable machine\n" );
92                 return 0;
93         }
94         if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
95                 printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
96                        "acpi=force is required to enable ACPI\n",
97                        year, CONFIG_ACPI_BLACKLIST_YEAR);
98                 return 1;
99         }
100         return 0;
101 }
102 #else
103 static inline int blacklist_by_year(void)
104 {
105         return 0;
106 }
107 #endif
108
109 int __init acpi_blacklisted(void)
110 {
111         int i = 0;
112         int blacklisted = 0;
113         struct acpi_table_header table_header;
114
115         while (acpi_blacklist[i].oem_id[0] != '\0') {
116                 if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
117                         i++;
118                         continue;
119                 }
120
121                 if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) {
122                         i++;
123                         continue;
124                 }
125
126                 if (strncmp
127                     (acpi_blacklist[i].oem_table_id, table_header.oem_table_id,
128                      8)) {
129                         i++;
130                         continue;
131                 }
132
133                 if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
134                     || (acpi_blacklist[i].oem_revision_predicate ==
135                         less_than_or_equal
136                         && table_header.oem_revision <=
137                         acpi_blacklist[i].oem_revision)
138                     || (acpi_blacklist[i].oem_revision_predicate ==
139                         greater_than_or_equal
140                         && table_header.oem_revision >=
141                         acpi_blacklist[i].oem_revision)
142                     || (acpi_blacklist[i].oem_revision_predicate == equal
143                         && table_header.oem_revision ==
144                         acpi_blacklist[i].oem_revision)) {
145
146                         printk(KERN_ERR PREFIX
147                                "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
154                                "Reason: %s. This is a %s error\n",
155                                acpi_blacklist[i].reason,
156                                (acpi_blacklist[i].
157                                 is_critical_error ? "non-recoverable" :
158                                 "recoverable"));
159
160                         blacklisted = acpi_blacklist[i].is_critical_error;
161                         break;
162                 } else {
163                         i++;
164                 }
165         }
166
167         blacklisted += blacklist_by_year();
168
169         dmi_check_system(acpi_osi_dmi_table);
170
171         return blacklisted;
172 }
173 #ifdef CONFIG_DMI
174 static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
175 {
176         acpi_dmi_osi_linux(1, d);       /* enable */
177         return 0;
178 }
179 static int __init dmi_disable_osi_vista(const struct dmi_system_id *d)
180 {
181         printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
182         acpi_osi_setup("!Windows 2006");
183         return 0;
184 }
185
186 static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
187         {
188         .callback = dmi_disable_osi_vista,
189         .ident = "Fujitsu Siemens",
190         .matches = {
191                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
192                      DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
193                 },
194         },
195
196         /*
197          * BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
198          * Linux ignores it, except for the machines enumerated below.
199          */
200
201         /*
202          * Lenovo has a mix of systems OSI(Linux) situations
203          * and thus we can not wildcard the vendor.
204          *
205          * _OSI(Linux) helps sound
206          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"),
207          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"),
208          * _OSI(Linux) has Linux specific hooks
209          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
210          * _OSI(Linux) is a NOP:
211          * DMI_MATCH(DMI_PRODUCT_VERSION, "3000 N100"),
212          * DMI_MATCH(DMI_PRODUCT_VERSION, "LENOVO3000 V100"),
213          */
214         {
215         .callback = dmi_enable_osi_linux,
216         .ident = "Lenovo ThinkPad R61",
217         .matches = {
218                      DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
219                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"),
220                 },
221         },
222         {
223         .callback = dmi_enable_osi_linux,
224         .ident = "Lenovo ThinkPad T61",
225         .matches = {
226                      DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
227                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"),
228                 },
229         },
230         {
231         .callback = dmi_enable_osi_linux,
232         .ident = "Lenovo ThinkPad X61",
233         .matches = {
234                      DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
235                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
236                 },
237         },
238         {}
239 };
240
241 #endif /* CONFIG_DMI */