summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/blacklist.c
blob: 018fc16c44ce26fa7e962b56651e0d2b57901d86 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/*
 *  blacklist.c
 *
 *  Check to see if the given machine has a known bad ACPI BIOS
 *  or if the BIOS is too old.
 *  Check given machine against acpi_osi_dmi_table[].
 *
 *  Copyright (C) 2004 Len Brown <len.brown@intel.com>
 *  Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <acpi/acpi_bus.h>
#include <linux/dmi.h>

enum acpi_blacklist_predicates {
	all_versions,
	less_than_or_equal,
	equal,
	greater_than_or_equal,
};

struct acpi_blacklist_item {
	char oem_id[7];
	char oem_table_id[9];
	u32 oem_revision;
	char *table;
	enum acpi_blacklist_predicates oem_revision_predicate;
	char *reason;
	u32 is_critical_error;
};

static struct dmi_system_id acpi_osi_dmi_table[] __initdata;

/*
 * POLICY: If *anything* doesn't work, put it on the blacklist.
 *	   If they are critical errors, mark it critical, and abort driver load.
 */
static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
	/* Compaq Presario 1700 */
	{"PTLTD ", "  DSDT  ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
	 "Multiple problems", 1},
	/* Sony FX120, FX140, FX150? */
	{"SONY  ", "U0      ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
	 "ACPI driver problem", 1},
	/* Compaq Presario 800, Insyde BIOS */
	{"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
	 "Does not use _REG to protect EC OpRegions", 1},
	/* IBM 600E - _ADR should return 7, but it returns 1 */
	{"IBM   ", "TP600E  ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
	 "Incorrect _ADR", 1},
	{"ASUS\0\0", "P2B-S   ", 0, ACPI_SIG_DSDT, all_versions,
	 "Bogus PCI routing", 1},

	{""}
};

#if	CONFIG_ACPI_BLACKLIST_YEAR

static int __init blacklist_by_year(void)
{
	int year = dmi_get_year(DMI_BIOS_DATE);
	/* Doesn't exist? Likely an old system */
	if (year == -1) {
		printk(KERN_ERR PREFIX "no DMI BIOS year, "
			"acpi=force is required to enable ACPI\n" );
		return 1;
	}
	/* 0? Likely a buggy new BIOS */
	if (year == 0) {
		printk(KERN_ERR PREFIX "DMI BIOS year==0, "
			"assuming ACPI-capable machine\n" );
		return 0;
	}
	if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
		printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
		       "acpi=force is required to enable ACPI\n",
		       year, CONFIG_ACPI_BLACKLIST_YEAR);
		return 1;
	}
	return 0;
}
#else
static inline int blacklist_by_year(void)
{
	return 0;
}
#endif

int __init acpi_blacklisted(void)
{
	int i = 0;
	int blacklisted = 0;
	struct acpi_table_header table_header;

	while (acpi_blacklist[i].oem_id[0] != '\0') {
		if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
			i++;
			continue;
		}

		if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) {
			i++;
			continue;
		}

		if (strncmp
		    (acpi_blacklist[i].oem_table_id, table_header.oem_table_id,
		     8)) {
			i++;
			continue;
		}

		if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
		    || (acpi_blacklist[i].oem_revision_predicate ==
			less_than_or_equal
			&& table_header.oem_revision <=
			acpi_blacklist[i].oem_revision)
		    || (acpi_blacklist[i].oem_revision_predicate ==
			greater_than_or_equal
			&& table_header.oem_revision >=
			acpi_blacklist[i].oem_revision)
		    || (acpi_blacklist[i].oem_revision_predicate == equal
			&& table_header.oem_revision ==
			acpi_blacklist[i].oem_revision)) {

			printk(KERN_ERR PREFIX
			       "Vendor \"%6.6s\" System \"%8.8s\" "
			       "Revision 0x%x has a known ACPI BIOS problem.\n",
			       acpi_blacklist[i].oem_id,
			       acpi_blacklist[i].oem_table_id,
			       acpi_blacklist[i].oem_revision);

			printk(KERN_ERR PREFIX
			       "Reason: %s. This is a %s error\n",
			       acpi_blacklist[i].reason,
			       (acpi_blacklist[i].
				is_critical_error ? "non-recoverable" :
				"recoverable"));

			blacklisted = acpi_blacklist[i].is_critical_error;
			break;
		} else {
			i++;
		}
	}

	blacklisted += blacklist_by_year();

	dmi_check_system(acpi_osi_dmi_table);

	return blacklisted;
}
#ifdef CONFIG_DMI
static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
	{}
};

#endif /* CONFIG_DMI */