Commit 63eac9ba authored by Len Brown's avatar Len Brown

Pull dmi-2.6.24 into release branch

parents 3645ca83 a1bd4e35
This diff is collapsed.
......@@ -77,11 +77,55 @@ static struct workqueue_struct *kacpi_notify_wq;
#define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
static char osi_additional_string[OSI_STRING_LENGTH_MAX];
static int osi_linux; /* disable _OSI(Linux) by default */
/*
* "Ode to _OSI(Linux)"
*
* osi_linux -- Control response to BIOS _OSI(Linux) query.
*
* As Linux evolves, the features that it supports change.
* So an OSI string such as "Linux" is not specific enough
* to be useful across multiple versions of Linux. It
* doesn't identify any particular feature, interface,
* or even any particular version of Linux...
*
* Unfortunately, Linux-2.6.22 and earlier responded "yes"
* to a BIOS _OSI(Linux) query. When
* a reference mobile BIOS started using it, its use
* started to spread to many vendor platforms.
* As it is not supportable, we need to halt that spread.
*
* Today, most BIOS references to _OSI(Linux) are noise --
* they have no functional effect and are just dead code
* carried over from the reference BIOS.
*
* The next most common case is that _OSI(Linux) harms Linux,
* usually by causing the BIOS to follow paths that are
* not tested during Windows validation.
*
* Finally, there is a short list of platforms
* where OSI(Linux) benefits Linux.
*
* In Linux-2.6.23, OSI(Linux) is first disabled by default.
* DMI is used to disable the dmesg warning about OSI(Linux)
* on platforms where it is known to have no effect.
* But a dmesg warning remains for systems where
* we do not know if OSI(Linux) is good or bad for the system.
* DMI is also used to enable OSI(Linux) for the machines
* that are known to need it.
*
* BIOS writers should NOT query _OSI(Linux) on future systems.
* It will be ignored by default, and to get Linux to
* not ignore it will require a kernel source update to
* add a DMI entry, or a boot-time "acpi_osi=Linux" invocation.
*/
#define OSI_LINUX_ENABLE 0
#ifdef CONFIG_DMI
static struct __initdata dmi_system_id acpi_osl_dmi_table[];
#endif
struct osi_linux {
unsigned int enable:1;
unsigned int dmi:1;
unsigned int cmdline:1;
unsigned int known:1;
} osi_linux = { OSI_LINUX_ENABLE, 0, 0, 0};
static void __init acpi_request_region (struct acpi_generic_address *addr,
unsigned int length, char *desc)
......@@ -133,7 +177,6 @@ device_initcall(acpi_reserve_resources);
acpi_status __init acpi_os_initialize(void)
{
dmi_check_system(acpi_osl_dmi_table);
return AE_OK;
}
......@@ -964,13 +1007,37 @@ static int __init acpi_os_name_setup(char *str)
__setup("acpi_os_name=", acpi_os_name_setup);
static void enable_osi_linux(int enable) {
static void __init set_osi_linux(unsigned int enable)
{
if (osi_linux.enable != enable) {
osi_linux.enable = enable;
printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n",
enable ? "Add": "Delet");
}
return;
}
if (osi_linux != enable)
printk(KERN_INFO PREFIX "%sabled _OSI(Linux)\n",
enable ? "En": "Dis");
static void __init acpi_cmdline_osi_linux(unsigned int enable)
{
osi_linux.cmdline = 1; /* cmdline set the default */
set_osi_linux(enable);
return;
}
void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
{
osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
if (enable == -1)
return;
osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */
set_osi_linux(enable);
osi_linux = enable;
return;
}
......@@ -987,12 +1054,12 @@ static int __init acpi_osi_setup(char *str)
printk(KERN_INFO PREFIX "_OSI method disabled\n");
acpi_gbl_create_osi_method = FALSE;
} else if (!strcmp("!Linux", str)) {
enable_osi_linux(0);
acpi_cmdline_osi_linux(0); /* !enable */
} else if (*str == '!') {
if (acpi_osi_invalidate(++str) == AE_OK)
printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
} else if (!strcmp("Linux", str)) {
enable_osi_linux(1);
acpi_cmdline_osi_linux(1); /* enable */
} else if (*osi_additional_string == '\0') {
strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX);
printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
......@@ -1141,6 +1208,34 @@ acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
return (AE_OK);
}
/**
* acpi_dmi_dump - dump DMI slots needed for blacklist entry
*
* Returns 0 on success
*/
int acpi_dmi_dump(void)
{
if (!dmi_available)
return -1;
printk(KERN_NOTICE PREFIX "DMI System Vendor: %s\n",
dmi_get_slot(DMI_SYS_VENDOR));
printk(KERN_NOTICE PREFIX "DMI Product Name: %s\n",
dmi_get_slot(DMI_PRODUCT_NAME));
printk(KERN_NOTICE PREFIX "DMI Product Version: %s\n",
dmi_get_slot(DMI_PRODUCT_VERSION));
printk(KERN_NOTICE PREFIX "DMI Board Name: %s\n",
dmi_get_slot(DMI_BOARD_NAME));
printk(KERN_NOTICE PREFIX "DMI BIOS Vendor: %s\n",
dmi_get_slot(DMI_BIOS_VENDOR));
printk(KERN_NOTICE PREFIX "DMI BIOS Date: %s\n",
dmi_get_slot(DMI_BIOS_DATE));
return 0;
}
/******************************************************************************
*
* FUNCTION: acpi_os_validate_interface
......@@ -1160,13 +1255,29 @@ acpi_os_validate_interface (char *interface)
if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
return AE_OK;
if (!strcmp("Linux", interface)) {
printk(KERN_WARNING PREFIX
"System BIOS is requesting _OSI(Linux)\n");
printk(KERN_WARNING PREFIX
"If \"acpi_osi=Linux\" works better,\n"
"Please send dmidecode "
"to linux-acpi@vger.kernel.org\n");
if(osi_linux)
printk(KERN_NOTICE PREFIX
"BIOS _OSI(Linux) query %s%s\n",
osi_linux.enable ? "honored" : "ignored",
osi_linux.cmdline ? " via cmdline" :
osi_linux.dmi ? " via DMI" : "");
if (!osi_linux.dmi) {
if (acpi_dmi_dump())
printk(KERN_NOTICE PREFIX
"[please extract dmidecode output]\n");
printk(KERN_NOTICE PREFIX
"Please send DMI info above to "
"linux-acpi@vger.kernel.org\n");
}
if (!osi_linux.known && !osi_linux.cmdline) {
printk(KERN_NOTICE PREFIX
"If \"acpi_osi=%sLinux\" works better, "
"please notify linux-acpi@vger.kernel.org\n",
osi_linux.enable ? "!" : "");
}
if (osi_linux.enable)
return AE_OK;
}
return AE_SUPPORT;
......@@ -1198,28 +1309,4 @@ acpi_os_validate_address (
return AE_OK;
}
#ifdef CONFIG_DMI
static int dmi_osi_linux(const struct dmi_system_id *d)
{
printk(KERN_NOTICE "%s detected: enabling _OSI(Linux)\n", d->ident);
enable_osi_linux(1);
return 0;
}
static struct dmi_system_id acpi_osl_dmi_table[] __initdata = {
/*
* Boxes that need _OSI(Linux)
*/
{
.callback = dmi_osi_linux,
.ident = "Intel Napa CRB",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Intel Corporation"),
DMI_MATCH(DMI_BOARD_NAME, "MPAD-MSAE Customer Reference Boards"),
},
},
{}
};
#endif /* CONFIG_DMI */
#endif
......@@ -173,8 +173,6 @@ static struct device *dmi_dev;
if (dmi_get_system_info(_field)) \
sys_dmi_attributes[i++] = &sys_dmi_##_name##_attr.dev_attr.attr;
extern int dmi_available;
/* In a separate function to keep gcc 3.2 happy - do NOT merge this in
dmi_id_init! */
static void __init dmi_id_init_attr_table(void)
......
......@@ -470,3 +470,11 @@ int dmi_get_year(int field)
return year;
}
/**
* dmi_get_slot - return dmi_ident[slot]
* @slot: index into dmi_ident[]
*/
char *dmi_get_slot(int slot)
{
return(dmi_ident[slot]);
}
......@@ -40,6 +40,7 @@
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_numa.h>
#include <asm/acpi.h>
#include <linux/dmi.h>
#ifdef CONFIG_ACPI
......@@ -192,7 +193,9 @@ extern int ec_transaction(u8 command,
#endif /*CONFIG_ACPI_EC*/
extern int acpi_blacklisted(void);
extern void acpi_bios_year(char *s);
#ifdef CONFIG_DMI
extern void acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d);
#endif
#ifdef CONFIG_ACPI_NUMA
int acpi_get_pxm(acpi_handle handle);
......@@ -226,5 +229,5 @@ static inline int acpi_boot_table_init(void)
return 0;
}
#endif /* CONFIG_ACPI */
#endif /* !CONFIG_ACPI */
#endif /*_LINUX_ACPI_H*/
......@@ -78,6 +78,8 @@ extern const struct dmi_device * dmi_find_device(int type, const char *name,
extern void dmi_scan_machine(void);
extern int dmi_get_year(int field);
extern int dmi_name_in_vendors(const char *str);
extern int dmi_available;
extern char *dmi_get_slot(int slot);
#else
......@@ -87,6 +89,8 @@ static inline const struct dmi_device * dmi_find_device(int type, const char *na
const struct dmi_device *from) { return NULL; }
static inline int dmi_get_year(int year) { return 0; }
static inline int dmi_name_in_vendors(const char *s) { return 0; }
#define dmi_available 0
static inline char *dmi_get_slot(int slot) { return NULL; }
#endif
......
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