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- /*
- * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * 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 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., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- * You can also choose to distribute this program under the terms of
- * the Unmodified Binary Distribution Licence (as given in the file
- * COPYING.UBDL), provided that you have satisfied its requirements.
- */
-
- FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
- #include <stdint.h>
- #include <string.h>
- #include <errno.h>
- #include <ipxe/settings.h>
- #include <ipxe/init.h>
- #include <ipxe/uuid.h>
- #include <ipxe/smbios.h>
-
- /** SMBIOS settings scope */
- static const struct settings_scope smbios_settings_scope;
-
- /**
- * Construct SMBIOS raw-data tag
- *
- * @v _type SMBIOS structure type number
- * @v _structure SMBIOS structure data type
- * @v _field Field within SMBIOS structure data type
- * @ret tag SMBIOS setting tag
- */
- #define SMBIOS_RAW_TAG( _type, _structure, _field ) \
- ( ( (_type) << 16 ) | \
- ( offsetof ( _structure, _field ) << 8 ) | \
- ( sizeof ( ( ( _structure * ) 0 )->_field ) ) )
-
- /**
- * Construct SMBIOS string tag
- *
- * @v _type SMBIOS structure type number
- * @v _structure SMBIOS structure data type
- * @v _field Field within SMBIOS structure data type
- * @ret tag SMBIOS setting tag
- */
- #define SMBIOS_STRING_TAG( _type, _structure, _field ) \
- ( ( (_type) << 16 ) | \
- ( offsetof ( _structure, _field ) << 8 ) )
-
- /**
- * Check applicability of SMBIOS setting
- *
- * @v settings Settings block
- * @v setting Setting
- * @ret applies Setting applies within this settings block
- */
- static int smbios_applies ( struct settings *settings __unused,
- const struct setting *setting ) {
-
- return ( setting->scope == &smbios_settings_scope );
- }
-
- /**
- * Fetch value of SMBIOS setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v data Buffer to fill with setting data
- * @v len Length of buffer
- * @ret len Length of setting data, or negative error
- */
- static int smbios_fetch ( struct settings *settings __unused,
- struct setting *setting,
- void *data, size_t len ) {
- struct smbios_structure structure;
- unsigned int tag_instance;
- unsigned int tag_type;
- unsigned int tag_offset;
- unsigned int tag_len;
- int rc;
-
- /* Split tag into instance, type, offset and length */
- tag_instance = ( ( setting->tag >> 24 ) & 0xff );
- tag_type = ( ( setting->tag >> 16 ) & 0xff );
- tag_offset = ( ( setting->tag >> 8 ) & 0xff );
- tag_len = ( setting->tag & 0xff );
-
- /* Find SMBIOS structure */
- if ( ( rc = find_smbios_structure ( tag_type, tag_instance,
- &structure ) ) != 0 )
- return rc;
-
- {
- uint8_t buf[structure.header.len];
- const void *raw;
- union uuid uuid;
- unsigned int index;
-
- /* Read SMBIOS structure */
- if ( ( rc = read_smbios_structure ( &structure, buf,
- sizeof ( buf ) ) ) != 0 )
- return rc;
-
- /* A <length> of zero indicates that the byte at
- * <offset> contains a string index. An <offset> of
- * zero indicates that the <length> contains a literal
- * string index.
- */
- if ( ( tag_len == 0 ) || ( tag_offset == 0 ) ) {
- index = ( ( tag_offset == 0 ) ?
- tag_len : buf[tag_offset] );
- if ( ( rc = read_smbios_string ( &structure, index,
- data, len ) ) < 0 ) {
- return rc;
- }
- if ( ! setting->type )
- setting->type = &setting_type_string;
- return rc;
- }
-
- /* Mangle UUIDs if necessary. iPXE treats UUIDs as
- * being in network byte order (big-endian). SMBIOS
- * specification version 2.6 states that UUIDs are
- * stored with little-endian values in the first three
- * fields; earlier versions did not specify an
- * endianness. dmidecode assumes that the byte order
- * is little-endian if and only if the SMBIOS version
- * is 2.6 or higher; we match this behaviour.
- */
- raw = &buf[tag_offset];
- if ( ( setting->type == &setting_type_uuid ) &&
- ( tag_len == sizeof ( uuid ) ) &&
- ( smbios_version() >= SMBIOS_VERSION ( 2, 6 ) ) ) {
- DBG ( "SMBIOS detected mangled UUID\n" );
- memcpy ( &uuid, &buf[tag_offset], sizeof ( uuid ) );
- uuid_mangle ( &uuid );
- raw = &uuid;
- }
-
- /* Return data */
- if ( len > tag_len )
- len = tag_len;
- memcpy ( data, raw, len );
- if ( ! setting->type )
- setting->type = &setting_type_hex;
- return tag_len;
- }
- }
-
- /** SMBIOS settings operations */
- static struct settings_operations smbios_settings_operations = {
- .applies = smbios_applies,
- .fetch = smbios_fetch,
- };
-
- /** SMBIOS settings */
- static struct settings smbios_settings = {
- .refcnt = NULL,
- .siblings = LIST_HEAD_INIT ( smbios_settings.siblings ),
- .children = LIST_HEAD_INIT ( smbios_settings.children ),
- .op = &smbios_settings_operations,
- .default_scope = &smbios_settings_scope,
- };
-
- /** Initialise SMBIOS settings */
- static void smbios_init ( void ) {
- int rc;
-
- if ( ( rc = register_settings ( &smbios_settings, NULL,
- "smbios" ) ) != 0 ) {
- DBG ( "SMBIOS could not register settings: %s\n",
- strerror ( rc ) );
- return;
- }
- }
-
- /** SMBIOS settings initialiser */
- struct init_fn smbios_init_fn __init_fn ( INIT_NORMAL ) = {
- .initialise = smbios_init,
- };
-
- /** UUID setting obtained via SMBIOS */
- const struct setting uuid_setting __setting ( SETTING_HOST, uuid ) = {
- .name = "uuid",
- .description = "UUID",
- .tag = SMBIOS_RAW_TAG ( SMBIOS_TYPE_SYSTEM_INFORMATION,
- struct smbios_system_information, uuid ),
- .type = &setting_type_uuid,
- .scope = &smbios_settings_scope,
- };
-
- /** Manufacturer name setting */
- const struct setting manufacturer_setting __setting ( SETTING_HOST_EXTRA,
- manufacturer ) = {
- .name = "manufacturer",
- .description = "Manufacturer",
- .tag = SMBIOS_STRING_TAG ( SMBIOS_TYPE_SYSTEM_INFORMATION,
- struct smbios_system_information,
- manufacturer ),
- .type = &setting_type_string,
- .scope = &smbios_settings_scope,
- };
-
- /** Product name setting */
- const struct setting product_setting __setting ( SETTING_HOST_EXTRA, product )={
- .name = "product",
- .description = "Product name",
- .tag = SMBIOS_STRING_TAG ( SMBIOS_TYPE_SYSTEM_INFORMATION,
- struct smbios_system_information,
- product ),
- .type = &setting_type_string,
- .scope = &smbios_settings_scope,
- };
-
- /** Serial number setting */
- const struct setting serial_setting __setting ( SETTING_HOST_EXTRA, serial ) = {
- .name = "serial",
- .description = "Serial number",
- .tag = SMBIOS_STRING_TAG ( SMBIOS_TYPE_SYSTEM_INFORMATION,
- struct smbios_system_information,
- serial ),
- .type = &setting_type_string,
- .scope = &smbios_settings_scope,
- };
-
- /** Asset tag setting */
- const struct setting asset_setting __setting ( SETTING_HOST_EXTRA, asset ) = {
- .name = "asset",
- .description = "Asset tag",
- .tag = SMBIOS_STRING_TAG ( SMBIOS_TYPE_ENCLOSURE_INFORMATION,
- struct smbios_enclosure_information,
- asset_tag ),
- .type = &setting_type_string,
- .scope = &smbios_settings_scope,
- };
-
- /** Board serial number setting (may differ from chassis serial number) */
- const struct setting board_serial_setting __setting ( SETTING_HOST_EXTRA,
- board_serial ) = {
- .name = "board-serial",
- .description = "Base board serial",
- .tag = SMBIOS_STRING_TAG ( SMBIOS_TYPE_BASE_BOARD_INFORMATION,
- struct smbios_base_board_information,
- serial ),
- .type = &setting_type_string,
- .scope = &smbios_settings_scope,
- };
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