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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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #include <stdint.h>
- #include <string.h>
- #include <errno.h>
- #include <gpxe/settings.h>
- #include <gpxe/init.h>
- #include <gpxe/uuid.h>
- #include <smbios.h>
-
- /** SMBIOS settings tag magic number */
- #define SMBIOS_TAG_MAGIC 0x5B /* "SmBios" */
-
- /**
- * Construct SMBIOS empty tag
- *
- * @ret tag SMBIOS setting tag
- */
- #define SMBIOS_EMPTY_TAG ( SMBIOS_TAG_MAGIC << 24 )
-
- /**
- * 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 ) \
- ( ( SMBIOS_TAG_MAGIC << 24 ) | \
- ( (_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 ) \
- ( ( SMBIOS_TAG_MAGIC << 24 ) | \
- ( (_type) << 16 ) | \
- ( offsetof ( _structure, _field ) << 8 ) )
-
- /**
- * Store value of SMBIOS setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v data Setting data, or NULL to clear setting
- * @v len Length of setting data
- * @ret rc Return status code
- */
- static int smbios_store ( struct settings *settings __unused,
- struct setting *setting __unused,
- const void *data __unused, size_t len __unused ) {
- /* Cannot write data into SMBIOS */
- return -ENOTSUP;
- }
-
- /**
- * 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_magic;
- unsigned int tag_type;
- unsigned int tag_offset;
- unsigned int tag_len;
- int rc;
-
- /* Split tag into type, offset and length */
- tag_magic = ( setting->tag >> 24 );
- tag_type = ( ( setting->tag >> 16 ) & 0xff );
- tag_offset = ( ( setting->tag >> 8 ) & 0xff );
- tag_len = ( setting->tag & 0xff );
- if ( tag_magic != SMBIOS_TAG_MAGIC )
- return -ENOENT;
-
- /* Find SMBIOS structure */
- if ( ( rc = find_smbios_structure ( tag_type, &structure ) ) != 0 )
- return rc;
-
- {
- uint8_t buf[structure.header.len];
-
- /* Read SMBIOS structure */
- if ( ( rc = read_smbios_structure ( &structure, buf,
- sizeof ( buf ) ) ) != 0 )
- return rc;
-
- if ( tag_len == 0 ) {
- /* String */
- return read_smbios_string ( &structure,
- buf[tag_offset],
- data, len );
- } else {
- /* Raw data */
- if ( len > tag_len )
- len = tag_len;
- memcpy ( data, &buf[tag_offset], len );
- return tag_len;
- }
- }
- }
-
- /** SMBIOS settings operations */
- static struct settings_operations smbios_settings_operations = {
- .store = smbios_store,
- .fetch = smbios_fetch,
- };
-
- /** SMBIOS settings */
- static struct settings smbios_settings = {
- .refcnt = NULL,
- .name = "smbios",
- .tag_magic = SMBIOS_EMPTY_TAG,
- .siblings = LIST_HEAD_INIT ( smbios_settings.siblings ),
- .children = LIST_HEAD_INIT ( smbios_settings.children ),
- .op = &smbios_settings_operations,
- };
-
- /** Initialise SMBIOS settings */
- static void smbios_init ( void ) {
- int rc;
-
- if ( ( rc = register_settings ( &smbios_settings, NULL ) ) != 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 */
- struct setting uuid_setting __setting = {
- .name = "uuid",
- .description = "UUID",
- .tag = SMBIOS_RAW_TAG ( SMBIOS_TYPE_SYSTEM_INFORMATION,
- struct smbios_system_information, uuid ),
- .type = &setting_type_uuid,
- };
-
- /** Other SMBIOS named settings */
- struct setting smbios_named_settings[] __setting = {
- {
- .name = "manufacturer",
- .description = "Manufacturer",
- .tag = SMBIOS_STRING_TAG ( SMBIOS_TYPE_SYSTEM_INFORMATION,
- struct smbios_system_information,
- manufacturer ),
- .type = &setting_type_string,
- },
- {
- .name = "product",
- .description = "Product name",
- .tag = SMBIOS_STRING_TAG ( SMBIOS_TYPE_SYSTEM_INFORMATION,
- struct smbios_system_information,
- product ),
- .type = &setting_type_string,
- },
- {
- .name = "serial",
- .description = "Serial number",
- .tag = SMBIOS_STRING_TAG ( SMBIOS_TYPE_SYSTEM_INFORMATION,
- struct smbios_system_information,
- serial ),
- .type = &setting_type_string,
- },
- };
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