diff options
Diffstat (limited to 'contrib/syslinux-4.02/gpxe/src/interface/smbios/smbios_settings.c')
-rw-r--r-- | contrib/syslinux-4.02/gpxe/src/interface/smbios/smbios_settings.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/interface/smbios/smbios_settings.c b/contrib/syslinux-4.02/gpxe/src/interface/smbios/smbios_settings.c new file mode 100644 index 0000000..1c96564 --- /dev/null +++ b/contrib/syslinux-4.02/gpxe/src/interface/smbios/smbios_settings.c @@ -0,0 +1,194 @@ +/* + * 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. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <stdint.h> +#include <string.h> +#include <errno.h> +#include <gpxe/settings.h> +#include <gpxe/init.h> +#include <gpxe/uuid.h> +#include <gpxe/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 ) ) + +/** + * 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 = { + .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, + }, + { + .name = "asset", + .description = "Asset tag", + .tag = SMBIOS_STRING_TAG ( SMBIOS_TYPE_ENCLOSURE_INFORMATION, + struct smbios_enclosure_information, + asset_tag ), + .type = &setting_type_string, + }, +}; |