1 files changed, 259 insertions, 0 deletions
diff --git a/roms/ipxe/src/interface/smbios/smbios_settings.c b/roms/ipxe/src/interface/smbios/smbios_settings.c
new file mode 100644
index 000000000..2d571f2e4
--- /dev/null
+++ b/roms/ipxe/src/interface/smbios/smbios_settings.c
@@ -0,0 +1,259 @@
+/*
+ * 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,
+};