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#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

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);