0,0 → 1,1049 |
#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 <linux/efi.h> |
#include <linux/bootmem.h> |
#include <linux/random.h> |
#include <asm/dmi.h> |
#include <asm/unaligned.h> |
|
struct kobject *dmi_kobj; |
EXPORT_SYMBOL_GPL(dmi_kobj); |
|
/* |
* 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 = dmi_early_remap(dmi_base, orig_dmi_len); |
if (buf == NULL) |
return -1; |
|
dmi_decode_table(buf, decode, NULL); |
|
add_device_randomness(buf, dmi_len); |
|
dmi_early_unmap(buf, orig_dmi_len); |
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_pciaddr(int instance, int segment, int bus, |
int devfn, const char *name, int type) |
{ |
struct dmi_dev_onboard *dev; |
|
/* Ignore invalid values */ |
if (type == DMI_DEV_TYPE_DEV_SLOT && |
segment == 0xFFFF && bus == 0xFF && devfn == 0xFF) |
return; |
|
dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); |
if (!dev) |
return; |
|
dev->instance = instance; |
dev->segment = segment; |
dev->bus = bus; |
dev->devfn = devfn; |
|
strcpy((char *)&dev[1], name); |
dev->dev.type = type; |
dev->dev.name = (char *)&dev[1]; |
dev->dev.device_data = dev; |
|
list_add(&dev->dev.list, &dmi_devices); |
} |
|
static void __init dmi_save_extended_devices(const struct dmi_header *dm) |
{ |
const char *name; |
const u8 *d = (u8 *)dm; |
|
/* Skip disabled device */ |
if ((d[0x5] & 0x80) == 0) |
return; |
|
name = dmi_string_nosave(dm, d[0x4]); |
dmi_save_dev_pciaddr(d[0x6], *(u16 *)(d + 0x7), d[0x9], d[0xA], name, |
DMI_DEV_TYPE_DEV_ONBOARD); |
dmi_save_one_device(d[0x5] & 0x7f, name); |
} |
|
static void __init dmi_save_system_slot(const struct dmi_header *dm) |
{ |
const u8 *d = (u8 *)dm; |
|
/* Need SMBIOS 2.6+ structure */ |
if (dm->length < 0x11) |
return; |
dmi_save_dev_pciaddr(*(u16 *)(d + 0x9), *(u16 *)(d + 0xD), d[0xF], |
d[0x10], dmi_string_nosave(dm, d[0x4]), |
DMI_DEV_TYPE_DEV_SLOT); |
} |
|
static void __init count_mem_devices(const struct dmi_header *dm, void *v) |
{ |
if (dm->type != DMI_ENTRY_MEM_DEVICE) |
return; |
dmi_memdev_nr++; |
} |
|
static void __init save_mem_devices(const struct dmi_header *dm, void *v) |
{ |
const char *d = (const char *)dm; |
static int nr; |
|
if (dm->type != DMI_ENTRY_MEM_DEVICE) |
return; |
if (nr >= dmi_memdev_nr) { |
pr_warn(FW_BUG "Too many DIMM entries in SMBIOS table\n"); |
return; |
} |
dmi_memdev[nr].handle = get_unaligned(&dm->handle); |
dmi_memdev[nr].device = dmi_string(dm, d[0x10]); |
dmi_memdev[nr].bank = dmi_string(dm, d[0x11]); |
nr++; |
} |
|
void __init dmi_memdev_walk(void) |
{ |
if (!dmi_available) |
return; |
|
if (dmi_walk_early(count_mem_devices) == 0 && dmi_memdev_nr) { |
dmi_memdev = dmi_alloc(sizeof(*dmi_memdev) * dmi_memdev_nr); |
if (dmi_memdev) |
dmi_walk_early(save_mem_devices); |
} |
} |
|
/* |
* 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 9: /* System Slots */ |
dmi_save_system_slot(dm); |
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]; |
|
if (efi_enabled(EFI_CONFIG_TABLES)) { |
/* |
* According to the DMTF SMBIOS reference spec v3.0.0, it is |
* allowed to define both the 64-bit entry point (smbios3) and |
* the 32-bit entry point (smbios), in which case they should |
* either both point to the same SMBIOS structure table, or the |
* table pointed to by the 64-bit entry point should contain a |
* superset of the table contents pointed to by the 32-bit entry |
* point (section 5.2) |
* This implies that the 64-bit entry point should have |
* precedence if it is defined and supported by the OS. If we |
* have the 64-bit entry point, but fail to decode it, fall |
* back to the legacy one (if available) |
*/ |
if (efi.smbios3 != EFI_INVALID_TABLE_ADDR) { |
p = dmi_early_remap(efi.smbios3, 32); |
if (p == NULL) |
goto error; |
memcpy_fromio(buf, p, 32); |
dmi_early_unmap(p, 32); |
|
if (!dmi_smbios3_present(buf)) { |
dmi_available = 1; |
goto out; |
} |
} |
if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
goto error; |
|
/* This is called as a core_initcall() because it isn't |
* needed during early boot. This also means we can |
* iounmap the space when we're done with it. |
*/ |
p = dmi_early_remap(efi.smbios, 32); |
if (p == NULL) |
goto error; |
memcpy_fromio(buf, p, 32); |
dmi_early_unmap(p, 32); |
|
if (!dmi_present(buf)) { |
dmi_available = 1; |
goto out; |
} |
} else if (IS_ENABLED(CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK)) { |
p = dmi_early_remap(0xF0000, 0x10000); |
if (p == NULL) |
goto error; |
|
/* |
* 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_fromio(buf + 16, q, 16); |
if (!dmi_smbios3_present(buf) || !dmi_present(buf)) { |
dmi_available = 1; |
dmi_early_unmap(p, 0x10000); |
goto out; |
} |
memcpy(buf, buf + 16, 16); |
} |
dmi_early_unmap(p, 0x10000); |
} |
error: |
pr_info("DMI not present or invalid.\n"); |
out: |
dmi_initialized = 1; |
} |
|
static ssize_t raw_table_read(struct file *file, struct kobject *kobj, |
struct bin_attribute *attr, char *buf, |
loff_t pos, size_t count) |
{ |
memcpy(buf, attr->private + pos, count); |
return count; |
} |
|
static BIN_ATTR(smbios_entry_point, S_IRUSR, raw_table_read, NULL, 0); |
static BIN_ATTR(DMI, S_IRUSR, raw_table_read, NULL, 0); |
|
static int __init dmi_init(void) |
{ |
struct kobject *tables_kobj; |
u8 *dmi_table; |
int ret = -ENOMEM; |
|
if (!dmi_available) { |
ret = -ENODATA; |
goto err; |
} |
|
/* |
* Set up dmi directory at /sys/firmware/dmi. This entry should stay |
* even after farther error, as it can be used by other modules like |
* dmi-sysfs. |
*/ |
dmi_kobj = kobject_create_and_add("dmi", firmware_kobj); |
if (!dmi_kobj) |
goto err; |
|
tables_kobj = kobject_create_and_add("tables", dmi_kobj); |
if (!tables_kobj) |
goto err; |
|
dmi_table = dmi_remap(dmi_base, dmi_len); |
if (!dmi_table) |
goto err_tables; |
|
bin_attr_smbios_entry_point.size = smbios_entry_point_size; |
bin_attr_smbios_entry_point.private = smbios_entry_point; |
ret = sysfs_create_bin_file(tables_kobj, &bin_attr_smbios_entry_point); |
if (ret) |
goto err_unmap; |
|
bin_attr_DMI.size = dmi_len; |
bin_attr_DMI.private = dmi_table; |
ret = sysfs_create_bin_file(tables_kobj, &bin_attr_DMI); |
if (!ret) |
return 0; |
|
sysfs_remove_bin_file(tables_kobj, |
&bin_attr_smbios_entry_point); |
err_unmap: |
dmi_unmap(dmi_table); |
err_tables: |
kobject_del(tables_kobj); |
kobject_put(tables_kobj); |
err: |
pr_err("dmi: Firmware registration failed.\n"); |
|
return ret; |
} |
subsys_initcall(dmi_init); |
|
/** |
* dmi_set_dump_stack_arch_desc - set arch description for dump_stack() |
* |
* Invoke dump_stack_set_arch_desc() with DMI system information so that |
* DMI identifiers are printed out on task dumps. Arch boot code should |
* call this function after dmi_scan_machine() if it wants to print out DMI |
* identifiers on task dumps. |
*/ |
void __init dmi_set_dump_stack_arch_desc(void) |
{ |
dump_stack_set_arch_desc("%s", dmi_ids_string); |
} |
|
/** |
* 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_first_match - find dmi_system_id structure matching 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 until the first match is found. Return the |
* pointer to the matching entry or NULL if there's no match. |
*/ |
const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) |
{ |
const struct dmi_system_id *d; |
|
for (d = list; !dmi_is_end_of_table(d); d++) |
if (dmi_matches(d)) |
return d; |
|
return NULL; |
} |
EXPORT_SYMBOL(dmi_first_match); |
|
/** |
* 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_name_in_serial - Check if string is in the DMI product serial information |
* @str: string to check for |
*/ |
int dmi_name_in_serial(const char *str) |
{ |
int f = DMI_PRODUCT_SERIAL; |
if (dmi_ident[f] && strstr(dmi_ident[f], str)) |
return 1; |
return 0; |
} |
|
/** |
* dmi_name_in_vendors - Check if string is in the DMI system or board vendor name |
* @str: Case sensitive Name |
*/ |
int dmi_name_in_vendors(const char *str) |
{ |
static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE }; |
int i; |
for (i = 0; fields[i] != DMI_NONE; i++) { |
int f = fields[i]; |
if (dmi_ident[f] && strstr(dmi_ident[f], str)) |
return 1; |
} |
return 0; |
} |
EXPORT_SYMBOL(dmi_name_in_vendors); |
|
/** |
* 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 @type and @name, 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); |
|
/** |
* dmi_get_date - parse a DMI date |
* @field: data index (see enum dmi_field) |
* @yearp: optional out parameter for the year |
* @monthp: optional out parameter for the month |
* @dayp: optional out parameter for the day |
* |
* The date field is assumed to be in the form resembling |
* [mm[/dd]]/yy[yy] and the result is stored in the out |
* parameters any or all of which can be omitted. |
* |
* If the field doesn't exist, all out parameters are set to zero |
* and false is returned. Otherwise, true is returned with any |
* invalid part of date set to zero. |
* |
* On return, year, month and day are guaranteed to be in the |
* range of [0,9999], [0,12] and [0,31] respectively. |
*/ |
bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp) |
{ |
int year = 0, month = 0, day = 0; |
bool exists; |
const char *s, *y; |
char *e; |
|
s = dmi_get_system_info(field); |
exists = s; |
if (!exists) |
goto out; |
|
/* |
* Determine year first. We assume the date string resembles |
* mm/dd/yy[yy] but the original code extracted only the year |
* from the end. Keep the behavior in the spirit of no |
* surprises. |
*/ |
y = strrchr(s, '/'); |
if (!y) |
goto out; |
|
y++; |
year = simple_strtoul(y, &e, 10); |
if (y != e && year < 100) { /* 2-digit year */ |
year += 1900; |
if (year < 1996) /* no dates < spec 1.0 */ |
year += 100; |
} |
if (year > 9999) /* year should fit in %04d */ |
year = 0; |
|
/* parse the mm and dd */ |
month = simple_strtoul(s, &e, 10); |
if (s == e || *e != '/' || !month || month > 12) { |
month = 0; |
goto out; |
} |
|
s = e + 1; |
day = simple_strtoul(s, &e, 10); |
if (s == y || s == e || *e != '/' || day > 31) |
day = 0; |
out: |
if (yearp) |
*yearp = year; |
if (monthp) |
*monthp = month; |
if (dayp) |
*dayp = day; |
return exists; |
} |
EXPORT_SYMBOL(dmi_get_date); |
|
/** |
* dmi_walk - Walk the DMI table and get called back for every record |
* @decode: Callback function |
* @private_data: Private data to be passed to the callback function |
* |
* Returns -1 when the DMI table can't be reached, 0 on success. |
*/ |
int dmi_walk(void (*decode)(const struct dmi_header *, void *), |
void *private_data) |
{ |
u8 *buf; |
|
if (!dmi_available) |
return -1; |
|
buf = dmi_remap(dmi_base, dmi_len); |
if (buf == NULL) |
return -1; |
|
dmi_decode_table(buf, decode, private_data); |
|
dmi_unmap(buf); |
return 0; |
} |
EXPORT_SYMBOL_GPL(dmi_walk); |
|
/** |
* dmi_match - compare a string to the dmi field (if exists) |
* @f: DMI field identifier |
* @str: string to compare the DMI field to |
* |
* Returns true if the requested field equals to the str (including NULL). |
*/ |
bool dmi_match(enum dmi_field f, const char *str) |
{ |
const char *info = dmi_get_system_info(f); |
|
if (info == NULL || str == NULL) |
return info == str; |
|
return !strcmp(info, str); |
} |
EXPORT_SYMBOL_GPL(dmi_match); |
|
void dmi_memdev_name(u16 handle, const char **bank, const char **device) |
{ |
int n; |
|
if (dmi_memdev == NULL) |
return; |
|
for (n = 0; n < dmi_memdev_nr; n++) { |
if (handle == dmi_memdev[n].handle) { |
*bank = dmi_memdev[n].bank; |
*device = dmi_memdev[n].device; |
break; |
} |
} |
} |
EXPORT_SYMBOL_GPL(dmi_memdev_name); |