diff options
Diffstat (limited to 'drivers/acpi/blacklist.c')
| -rw-r--r-- | drivers/acpi/blacklist.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c new file mode 100644 index 000000000000..4c010e7f11b8 --- /dev/null +++ b/drivers/acpi/blacklist.c @@ -0,0 +1,169 @@ +/* + * blacklist.c + * + * Check to see if the given machine has a known bad ACPI BIOS + * or if the BIOS is too old. + * + * 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; + acpi_table_type table; + enum acpi_blacklist_predicates oem_revision_predicate; + char *reason; + u32 is_critical_error; +}; + +/* + * 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_DSDT, less_than_or_equal, "Multiple problems", 1}, + /* Sony FX120, FX140, FX150? */ + {"SONY ", "U0 ", 0x20010313, ACPI_DSDT, less_than_or_equal, "ACPI driver problem", 1}, + /* Compaq Presario 800, Insyde BIOS */ + {"INT440", "SYSFexxx", 0x00001001, ACPI_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_DSDT, less_than_or_equal, "Incorrect _ADR", 1}, + {"ASUS\0\0", "P2B-S ", 0, ACPI_DSDT, all_versions, "Bogus PCI routing", 1}, + + {""} +}; + + +#if CONFIG_ACPI_BLACKLIST_YEAR + +static int __init +blacklist_by_year(void) +{ + int year; + char *s = dmi_get_system_info(DMI_BIOS_DATE); + + if (!s) + return 0; + if (!*s) + return 0; + + s = strrchr(s, '/'); + if (!s) + return 0; + + s += 1; + + year = simple_strtoul(s,NULL,0); + + if (year < 100) { /* 2-digit year */ + year += 1900; + if (year < 1996) /* no dates < spec 1.0 */ + year += 100; + } + + 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_early(acpi_blacklist[i].table, &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(); + + return blacklisted; +} + |