forked from KolibriOS/kolibrios
687 lines
18 KiB
C
687 lines
18 KiB
C
#include <linux/types.h>
|
|
#include <linux/string.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/dmi.h>
|
|
#include <asm/unaligned.h>
|
|
#include <syscall.h>
|
|
struct kobject *dmi_kobj;
|
|
|
|
static void *dmi_alloc(unsigned len)
|
|
{
|
|
return __builtin_malloc(len);
|
|
};
|
|
|
|
/*
|
|
* DMI stands for "Desktop Management Interface". It is part
|
|
* of and an antecedent to, SMBIOS, which stands for System
|
|
* Management BIOS. See further: http://www.dmtf.org/standards
|
|
*/
|
|
static const char dmi_empty_string[] = " ";
|
|
|
|
static u32 dmi_ver __initdata;
|
|
static u32 dmi_len;
|
|
static u16 dmi_num;
|
|
static u8 smbios_entry_point[32];
|
|
static int smbios_entry_point_size;
|
|
|
|
/*
|
|
* Catch too early calls to dmi_check_system():
|
|
*/
|
|
static int dmi_initialized;
|
|
|
|
/* DMI system identification string used during boot */
|
|
static char dmi_ids_string[128] __initdata;
|
|
|
|
static struct dmi_memdev_info {
|
|
const char *device;
|
|
const char *bank;
|
|
u16 handle;
|
|
} *dmi_memdev;
|
|
static int dmi_memdev_nr;
|
|
|
|
static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s)
|
|
{
|
|
const u8 *bp = ((u8 *) dm) + dm->length;
|
|
|
|
if (s) {
|
|
s--;
|
|
while (s > 0 && *bp) {
|
|
bp += strlen(bp) + 1;
|
|
s--;
|
|
}
|
|
|
|
if (*bp != 0) {
|
|
size_t len = strlen(bp)+1;
|
|
size_t cmp_len = len > 8 ? 8 : len;
|
|
|
|
if (!memcmp(bp, dmi_empty_string, cmp_len))
|
|
return dmi_empty_string;
|
|
return bp;
|
|
}
|
|
}
|
|
|
|
return "";
|
|
}
|
|
|
|
static const char * __init dmi_string(const struct dmi_header *dm, u8 s)
|
|
{
|
|
const char *bp = dmi_string_nosave(dm, s);
|
|
char *str;
|
|
size_t len;
|
|
|
|
if (bp == dmi_empty_string)
|
|
return dmi_empty_string;
|
|
|
|
len = strlen(bp) + 1;
|
|
str = dmi_alloc(len);
|
|
if (str != NULL)
|
|
strcpy(str, bp);
|
|
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* We have to be cautious here. We have seen BIOSes with DMI pointers
|
|
* pointing to completely the wrong place for example
|
|
*/
|
|
static void dmi_decode_table(u8 *buf,
|
|
void (*decode)(const struct dmi_header *, void *),
|
|
void *private_data)
|
|
{
|
|
u8 *data = buf;
|
|
int i = 0;
|
|
|
|
/*
|
|
* Stop when we have seen all the items the table claimed to have
|
|
* (SMBIOS < 3.0 only) OR we reach an end-of-table marker (SMBIOS
|
|
* >= 3.0 only) OR we run off the end of the table (should never
|
|
* happen but sometimes does on bogus implementations.)
|
|
*/
|
|
while ((!dmi_num || i < dmi_num) &&
|
|
(data - buf + sizeof(struct dmi_header)) <= dmi_len) {
|
|
const struct dmi_header *dm = (const struct dmi_header *)data;
|
|
|
|
/*
|
|
* We want to know the total length (formatted area and
|
|
* strings) before decoding to make sure we won't run off the
|
|
* table in dmi_decode or dmi_string
|
|
*/
|
|
data += dm->length;
|
|
while ((data - buf < dmi_len - 1) && (data[0] || data[1]))
|
|
data++;
|
|
if (data - buf < dmi_len - 1)
|
|
decode(dm, private_data);
|
|
|
|
data += 2;
|
|
i++;
|
|
|
|
/*
|
|
* 7.45 End-of-Table (Type 127) [SMBIOS reference spec v3.0.0]
|
|
* For tables behind a 64-bit entry point, we have no item
|
|
* count and no exact table length, so stop on end-of-table
|
|
* marker. For tables behind a 32-bit entry point, we have
|
|
* seen OEM structures behind the end-of-table marker on
|
|
* some systems, so don't trust it.
|
|
*/
|
|
if (!dmi_num && dm->type == DMI_ENTRY_END_OF_TABLE)
|
|
break;
|
|
}
|
|
|
|
/* Trim DMI table length if needed */
|
|
if (dmi_len > data - buf)
|
|
dmi_len = data - buf;
|
|
}
|
|
|
|
static phys_addr_t dmi_base;
|
|
|
|
static int __init dmi_walk_early(void (*decode)(const struct dmi_header *,
|
|
void *))
|
|
{
|
|
u8 *buf;
|
|
u32 orig_dmi_len = dmi_len;
|
|
|
|
buf = (u8*)MapIoMem(dmi_base, dmi_len, PG_SW);
|
|
if (buf == NULL)
|
|
return -1;
|
|
|
|
dmi_decode_table(buf, decode, NULL);
|
|
|
|
FreeKernelSpace(buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init dmi_checksum(const u8 *buf, u8 len)
|
|
{
|
|
u8 sum = 0;
|
|
int a;
|
|
|
|
for (a = 0; a < len; a++)
|
|
sum += buf[a];
|
|
|
|
return sum == 0;
|
|
}
|
|
|
|
static const char *dmi_ident[DMI_STRING_MAX];
|
|
static LIST_HEAD(dmi_devices);
|
|
int dmi_available;
|
|
|
|
/*
|
|
* Save a DMI string
|
|
*/
|
|
static void __init dmi_save_ident(const struct dmi_header *dm, int slot,
|
|
int string)
|
|
{
|
|
const char *d = (const char *) dm;
|
|
const char *p;
|
|
|
|
if (dmi_ident[slot])
|
|
return;
|
|
|
|
p = dmi_string(dm, d[string]);
|
|
if (p == NULL)
|
|
return;
|
|
|
|
dmi_ident[slot] = p;
|
|
}
|
|
|
|
static void __init dmi_save_uuid(const struct dmi_header *dm, int slot,
|
|
int index)
|
|
{
|
|
const u8 *d = (u8 *) dm + index;
|
|
char *s;
|
|
int is_ff = 1, is_00 = 1, i;
|
|
|
|
if (dmi_ident[slot])
|
|
return;
|
|
|
|
for (i = 0; i < 16 && (is_ff || is_00); i++) {
|
|
if (d[i] != 0x00)
|
|
is_00 = 0;
|
|
if (d[i] != 0xFF)
|
|
is_ff = 0;
|
|
}
|
|
|
|
if (is_ff || is_00)
|
|
return;
|
|
|
|
s = dmi_alloc(16*2+4+1);
|
|
if (!s)
|
|
return;
|
|
|
|
/*
|
|
* As of version 2.6 of the SMBIOS specification, the first 3 fields of
|
|
* the UUID are supposed to be little-endian encoded. The specification
|
|
* says that this is the defacto standard.
|
|
*/
|
|
if (dmi_ver >= 0x020600)
|
|
sprintf(s, "%pUL", d);
|
|
else
|
|
sprintf(s, "%pUB", d);
|
|
|
|
dmi_ident[slot] = s;
|
|
}
|
|
|
|
static void __init dmi_save_type(const struct dmi_header *dm, int slot,
|
|
int index)
|
|
{
|
|
const u8 *d = (u8 *) dm + index;
|
|
char *s;
|
|
|
|
if (dmi_ident[slot])
|
|
return;
|
|
|
|
s = dmi_alloc(4);
|
|
if (!s)
|
|
return;
|
|
|
|
sprintf(s, "%u", *d & 0x7F);
|
|
dmi_ident[slot] = s;
|
|
}
|
|
|
|
static void __init dmi_save_one_device(int type, const char *name)
|
|
{
|
|
struct dmi_device *dev;
|
|
|
|
/* No duplicate device */
|
|
if (dmi_find_device(type, name, NULL))
|
|
return;
|
|
|
|
dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1);
|
|
if (!dev)
|
|
return;
|
|
|
|
dev->type = type;
|
|
strcpy((char *)(dev + 1), name);
|
|
dev->name = (char *)(dev + 1);
|
|
dev->device_data = NULL;
|
|
list_add(&dev->list, &dmi_devices);
|
|
}
|
|
|
|
static void __init dmi_save_devices(const struct dmi_header *dm)
|
|
{
|
|
int i, count = (dm->length - sizeof(struct dmi_header)) / 2;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
const char *d = (char *)(dm + 1) + (i * 2);
|
|
|
|
/* Skip disabled device */
|
|
if ((*d & 0x80) == 0)
|
|
continue;
|
|
|
|
dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1)));
|
|
}
|
|
}
|
|
|
|
static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm)
|
|
{
|
|
int i, count = *(u8 *)(dm + 1);
|
|
struct dmi_device *dev;
|
|
|
|
for (i = 1; i <= count; i++) {
|
|
const char *devname = dmi_string(dm, i);
|
|
|
|
if (devname == dmi_empty_string)
|
|
continue;
|
|
|
|
dev = dmi_alloc(sizeof(*dev));
|
|
if (!dev)
|
|
break;
|
|
|
|
dev->type = DMI_DEV_TYPE_OEM_STRING;
|
|
dev->name = devname;
|
|
dev->device_data = NULL;
|
|
|
|
list_add(&dev->list, &dmi_devices);
|
|
}
|
|
}
|
|
|
|
static void __init dmi_save_ipmi_device(const struct dmi_header *dm)
|
|
{
|
|
struct dmi_device *dev;
|
|
void *data;
|
|
|
|
data = dmi_alloc(dm->length);
|
|
if (data == NULL)
|
|
return;
|
|
|
|
memcpy(data, dm, dm->length);
|
|
|
|
dev = dmi_alloc(sizeof(*dev));
|
|
if (!dev)
|
|
return;
|
|
|
|
dev->type = DMI_DEV_TYPE_IPMI;
|
|
dev->name = "IPMI controller";
|
|
dev->device_data = data;
|
|
|
|
list_add_tail(&dev->list, &dmi_devices);
|
|
}
|
|
|
|
static void __init dmi_save_dev_onboard(int instance, int segment, int bus,
|
|
int devfn, const char *name)
|
|
{
|
|
struct dmi_dev_onboard *onboard_dev;
|
|
|
|
onboard_dev = dmi_alloc(sizeof(*onboard_dev) + strlen(name) + 1);
|
|
if (!onboard_dev)
|
|
return;
|
|
|
|
onboard_dev->instance = instance;
|
|
onboard_dev->segment = segment;
|
|
onboard_dev->bus = bus;
|
|
onboard_dev->devfn = devfn;
|
|
|
|
strcpy((char *)&onboard_dev[1], name);
|
|
onboard_dev->dev.type = DMI_DEV_TYPE_DEV_ONBOARD;
|
|
onboard_dev->dev.name = (char *)&onboard_dev[1];
|
|
onboard_dev->dev.device_data = onboard_dev;
|
|
|
|
list_add(&onboard_dev->dev.list, &dmi_devices);
|
|
}
|
|
|
|
static void __init dmi_save_extended_devices(const struct dmi_header *dm)
|
|
{
|
|
const u8 *d = (u8 *) dm + 5;
|
|
|
|
/* Skip disabled device */
|
|
if ((*d & 0x80) == 0)
|
|
return;
|
|
|
|
dmi_save_dev_onboard(*(d+1), *(u16 *)(d+2), *(d+4), *(d+5),
|
|
dmi_string_nosave(dm, *(d-1)));
|
|
dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1)));
|
|
}
|
|
|
|
static void __init count_mem_devices(const struct dmi_header *dm, void *v)
|
|
{
|
|
if (dm->type != DMI_ENTRY_MEM_DEVICE)
|
|
return;
|
|
dmi_memdev_nr++;
|
|
}
|
|
|
|
/*
|
|
* Process a DMI table entry. Right now all we care about are the BIOS
|
|
* and machine entries. For 2.5 we should pull the smbus controller info
|
|
* out of here.
|
|
*/
|
|
static void __init dmi_decode(const struct dmi_header *dm, void *dummy)
|
|
{
|
|
switch (dm->type) {
|
|
case 0: /* BIOS Information */
|
|
dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
|
|
dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
|
|
dmi_save_ident(dm, DMI_BIOS_DATE, 8);
|
|
break;
|
|
case 1: /* System Information */
|
|
dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
|
|
dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
|
|
dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
|
|
dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
|
|
dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8);
|
|
break;
|
|
case 2: /* Base Board Information */
|
|
dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
|
|
dmi_save_ident(dm, DMI_BOARD_NAME, 5);
|
|
dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
|
|
dmi_save_ident(dm, DMI_BOARD_SERIAL, 7);
|
|
dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8);
|
|
break;
|
|
case 3: /* Chassis Information */
|
|
dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4);
|
|
dmi_save_type(dm, DMI_CHASSIS_TYPE, 5);
|
|
dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6);
|
|
dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7);
|
|
dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8);
|
|
break;
|
|
case 10: /* Onboard Devices Information */
|
|
dmi_save_devices(dm);
|
|
break;
|
|
case 11: /* OEM Strings */
|
|
dmi_save_oem_strings_devices(dm);
|
|
break;
|
|
case 38: /* IPMI Device Information */
|
|
dmi_save_ipmi_device(dm);
|
|
break;
|
|
case 41: /* Onboard Devices Extended Information */
|
|
dmi_save_extended_devices(dm);
|
|
}
|
|
}
|
|
|
|
static int __init print_filtered(char *buf, size_t len, const char *info)
|
|
{
|
|
int c = 0;
|
|
const char *p;
|
|
|
|
if (!info)
|
|
return c;
|
|
|
|
for (p = info; *p; p++)
|
|
if (isprint(*p))
|
|
c += scnprintf(buf + c, len - c, "%c", *p);
|
|
else
|
|
c += scnprintf(buf + c, len - c, "\\x%02x", *p & 0xff);
|
|
return c;
|
|
}
|
|
|
|
static void __init dmi_format_ids(char *buf, size_t len)
|
|
{
|
|
int c = 0;
|
|
const char *board; /* Board Name is optional */
|
|
|
|
c += print_filtered(buf + c, len - c,
|
|
dmi_get_system_info(DMI_SYS_VENDOR));
|
|
c += scnprintf(buf + c, len - c, " ");
|
|
c += print_filtered(buf + c, len - c,
|
|
dmi_get_system_info(DMI_PRODUCT_NAME));
|
|
|
|
board = dmi_get_system_info(DMI_BOARD_NAME);
|
|
if (board) {
|
|
c += scnprintf(buf + c, len - c, "/");
|
|
c += print_filtered(buf + c, len - c, board);
|
|
}
|
|
c += scnprintf(buf + c, len - c, ", BIOS ");
|
|
c += print_filtered(buf + c, len - c,
|
|
dmi_get_system_info(DMI_BIOS_VERSION));
|
|
c += scnprintf(buf + c, len - c, " ");
|
|
c += print_filtered(buf + c, len - c,
|
|
dmi_get_system_info(DMI_BIOS_DATE));
|
|
}
|
|
|
|
/*
|
|
* Check for DMI/SMBIOS headers in the system firmware image. Any
|
|
* SMBIOS header must start 16 bytes before the DMI header, so take a
|
|
* 32 byte buffer and check for DMI at offset 16 and SMBIOS at offset
|
|
* 0. If the DMI header is present, set dmi_ver accordingly (SMBIOS
|
|
* takes precedence) and return 0. Otherwise return 1.
|
|
*/
|
|
static int __init dmi_present(const u8 *buf)
|
|
{
|
|
u32 smbios_ver;
|
|
|
|
if (memcmp(buf, "_SM_", 4) == 0 &&
|
|
buf[5] < 32 && dmi_checksum(buf, buf[5])) {
|
|
smbios_ver = get_unaligned_be16(buf + 6);
|
|
smbios_entry_point_size = buf[5];
|
|
memcpy(smbios_entry_point, buf, smbios_entry_point_size);
|
|
|
|
/* Some BIOS report weird SMBIOS version, fix that up */
|
|
switch (smbios_ver) {
|
|
case 0x021F:
|
|
case 0x0221:
|
|
pr_debug("SMBIOS version fixup(2.%d->2.%d)\n",
|
|
smbios_ver & 0xFF, 3);
|
|
smbios_ver = 0x0203;
|
|
break;
|
|
case 0x0233:
|
|
pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", 51, 6);
|
|
smbios_ver = 0x0206;
|
|
break;
|
|
}
|
|
} else {
|
|
smbios_ver = 0;
|
|
}
|
|
|
|
buf += 16;
|
|
|
|
if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) {
|
|
if (smbios_ver)
|
|
dmi_ver = smbios_ver;
|
|
else
|
|
dmi_ver = (buf[14] & 0xF0) << 4 | (buf[14] & 0x0F);
|
|
dmi_ver <<= 8;
|
|
dmi_num = get_unaligned_le16(buf + 12);
|
|
dmi_len = get_unaligned_le16(buf + 6);
|
|
dmi_base = get_unaligned_le32(buf + 8);
|
|
|
|
if (dmi_walk_early(dmi_decode) == 0) {
|
|
if (smbios_ver) {
|
|
pr_info("SMBIOS %d.%d present.\n",
|
|
dmi_ver >> 16, (dmi_ver >> 8) & 0xFF);
|
|
} else {
|
|
smbios_entry_point_size = 15;
|
|
memcpy(smbios_entry_point, buf,
|
|
smbios_entry_point_size);
|
|
pr_info("Legacy DMI %d.%d present.\n",
|
|
dmi_ver >> 16, (dmi_ver >> 8) & 0xFF);
|
|
}
|
|
dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string));
|
|
printk(KERN_DEBUG "DMI: %s\n", dmi_ids_string);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Check for the SMBIOS 3.0 64-bit entry point signature. Unlike the legacy
|
|
* 32-bit entry point, there is no embedded DMI header (_DMI_) in here.
|
|
*/
|
|
static int __init dmi_smbios3_present(const u8 *buf)
|
|
{
|
|
if (memcmp(buf, "_SM3_", 5) == 0 &&
|
|
buf[6] < 32 && dmi_checksum(buf, buf[6])) {
|
|
dmi_ver = get_unaligned_be32(buf + 6) & 0xFFFFFF;
|
|
dmi_num = 0; /* No longer specified */
|
|
dmi_len = get_unaligned_le32(buf + 12);
|
|
dmi_base = get_unaligned_le64(buf + 16);
|
|
smbios_entry_point_size = buf[6];
|
|
memcpy(smbios_entry_point, buf, smbios_entry_point_size);
|
|
|
|
if (dmi_walk_early(dmi_decode) == 0) {
|
|
pr_info("SMBIOS %d.%d.%d present.\n",
|
|
dmi_ver >> 16, (dmi_ver >> 8) & 0xFF,
|
|
dmi_ver & 0xFF);
|
|
dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string));
|
|
pr_debug("DMI: %s\n", dmi_ids_string);
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
void __init dmi_scan_machine(void)
|
|
{
|
|
char __iomem *p, *q;
|
|
char buf[32];
|
|
|
|
|
|
|
|
p = (char*)0x800F0000;
|
|
|
|
/*
|
|
* Iterate over all possible DMI header addresses q.
|
|
* Maintain the 32 bytes around q in buf. On the
|
|
* first iteration, substitute zero for the
|
|
* out-of-range bytes so there is no chance of falsely
|
|
* detecting an SMBIOS header.
|
|
*/
|
|
memset(buf, 0, 16);
|
|
for (q = p; q < p + 0x10000; q += 16) {
|
|
memcpy(buf + 16, q, 16);
|
|
if (!dmi_smbios3_present(buf) || !dmi_present(buf)) {
|
|
dmi_available = 1;
|
|
goto out;
|
|
}
|
|
memcpy(buf, buf + 16, 16);
|
|
}
|
|
error:
|
|
pr_info("DMI not present or invalid.\n");
|
|
out:
|
|
dmi_initialized = 1;
|
|
}
|
|
|
|
/**
|
|
/**
|
|
* dmi_matches - check if dmi_system_id structure matches system DMI data
|
|
* @dmi: pointer to the dmi_system_id structure to check
|
|
*/
|
|
static bool dmi_matches(const struct dmi_system_id *dmi)
|
|
{
|
|
int i;
|
|
|
|
WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n");
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) {
|
|
int s = dmi->matches[i].slot;
|
|
if (s == DMI_NONE)
|
|
break;
|
|
if (dmi_ident[s]) {
|
|
if (!dmi->matches[i].exact_match &&
|
|
strstr(dmi_ident[s], dmi->matches[i].substr))
|
|
continue;
|
|
else if (dmi->matches[i].exact_match &&
|
|
!strcmp(dmi_ident[s], dmi->matches[i].substr))
|
|
continue;
|
|
}
|
|
|
|
/* No match */
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* dmi_is_end_of_table - check for end-of-table marker
|
|
* @dmi: pointer to the dmi_system_id structure to check
|
|
*/
|
|
static bool dmi_is_end_of_table(const struct dmi_system_id *dmi)
|
|
{
|
|
return dmi->matches[0].slot == DMI_NONE;
|
|
}
|
|
|
|
/**
|
|
* dmi_check_system - check system DMI data
|
|
* @list: array of dmi_system_id structures to match against
|
|
* All non-null elements of the list must match
|
|
* their slot's (field index's) data (i.e., each
|
|
* list string must be a substring of the specified
|
|
* DMI slot's string data) to be considered a
|
|
* successful match.
|
|
*
|
|
* Walk the blacklist table running matching functions until someone
|
|
* returns non zero or we hit the end. Callback function is called for
|
|
* each successful match. Returns the number of matches.
|
|
*/
|
|
int dmi_check_system(const struct dmi_system_id *list)
|
|
{
|
|
int count = 0;
|
|
const struct dmi_system_id *d;
|
|
|
|
for (d = list; !dmi_is_end_of_table(d); d++)
|
|
if (dmi_matches(d)) {
|
|
count++;
|
|
if (d->callback && d->callback(d))
|
|
break;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
EXPORT_SYMBOL(dmi_check_system);
|
|
|
|
/**
|
|
* dmi_get_system_info - return DMI data value
|
|
* @field: data index (see enum dmi_field)
|
|
*
|
|
* Returns one DMI data value, can be used to perform
|
|
* complex DMI data checks.
|
|
*/
|
|
const char *dmi_get_system_info(int field)
|
|
{
|
|
return dmi_ident[field];
|
|
}
|
|
EXPORT_SYMBOL(dmi_get_system_info);
|
|
/**
|
|
* dmi_find_device - find onboard device by type/name
|
|
* @type: device type or %DMI_DEV_TYPE_ANY to match all device types
|
|
* @name: device name string or %NULL to match all
|
|
* @from: previous device found in search, or %NULL for new search.
|
|
*
|
|
* Iterates through the list of known onboard devices. If a device is
|
|
* found with a matching @vendor and @device, a pointer to its device
|
|
* structure is returned. Otherwise, %NULL is returned.
|
|
* A new search is initiated by passing %NULL as the @from argument.
|
|
* If @from is not %NULL, searches continue from next device.
|
|
*/
|
|
const struct dmi_device *dmi_find_device(int type, const char *name,
|
|
const struct dmi_device *from)
|
|
{
|
|
const struct list_head *head = from ? &from->list : &dmi_devices;
|
|
struct list_head *d;
|
|
|
|
for (d = head->next; d != &dmi_devices; d = d->next) {
|
|
const struct dmi_device *dev =
|
|
list_entry(d, struct dmi_device, list);
|
|
|
|
if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) &&
|
|
((name == NULL) || (strcmp(dev->name, name) == 0)))
|
|
return dev;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(dmi_find_device);
|