smbios_settings.c File Reference

#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>

Go to the source code of this file.

Defines
#define	SMBIOS_TAG_MAGIC   0x5B
	SMBIOS settings tag magic number.
#define	SMBIOS_EMPTY_TAG   ( SMBIOS_TAG_MAGIC << 24 )
	Construct SMBIOS empty tag.
#define	SMBIOS_RAW_TAG(_type, _structure, _field)
	Construct SMBIOS raw-data tag.
#define	SMBIOS_STRING_TAG(_type, _structure, _field)
	Construct SMBIOS string tag.
Functions
	FILE_LICENCE (GPL2_OR_LATER)
static int	smbios_fetch (struct settings *settings __unused, struct setting *setting, void *data, size_t len)
	Fetch value of SMBIOS setting.
static void	smbios_init (void)
	Initialise SMBIOS settings.
struct init_fn smbios_init_fn	__init_fn (INIT_NORMAL)
	SMBIOS settings initialiser.
Variables
static struct settings_operations	smbios_settings_operations
	SMBIOS settings operations.
static struct settings	smbios_settings
	SMBIOS settings.
struct setting uuid_setting	__setting
	UUID setting obtained via SMBIOS.

---

Define Documentation

#define SMBIOS_TAG_MAGIC   0x5B

SMBIOS settings tag magic number.

Definition at line 30 of file smbios_settings.c.

Referenced by smbios_fetch().

#define SMBIOS_EMPTY_TAG   ( SMBIOS_TAG_MAGIC << 24 )

Construct SMBIOS empty tag.

Return values:

tag

SMBIOS setting tag

Definition at line 37 of file smbios_settings.c.

#define SMBIOS_RAW_TAG	(	_type,
		_structure,
		_field		)

Value:

( ( SMBIOS_TAG_MAGIC << 24 ) |                          \
          ( (_type) << 16 ) |                                   \
          ( offsetof ( _structure, _field ) << 8 ) |            \
          ( sizeof ( ( ( _structure * ) 0 )->_field ) ) )

Construct SMBIOS raw-data tag.

Parameters:

	_type	SMBIOS structure type number
	_structure	SMBIOS structure data type
	_field	Field within SMBIOS structure data type

Return values:

tag

SMBIOS setting tag

Definition at line 47 of file smbios_settings.c.

#define SMBIOS_STRING_TAG	(	_type,
		_structure,
		_field		)

Value:

( ( SMBIOS_TAG_MAGIC << 24 ) |                          \
          ( (_type) << 16 ) |                                   \
          ( offsetof ( _structure, _field ) << 8 ) )

Construct SMBIOS string tag.

Parameters:

	_type	SMBIOS structure type number
	_structure	SMBIOS structure data type
	_field	Field within SMBIOS structure data type

Return values:

tag

SMBIOS setting tag

Definition at line 61 of file smbios_settings.c.

---

Function Documentation

FILE_LICENCE

(

GPL2_OR_LATER

)

static int smbios_fetch	(	struct settings *settings	__unused,
		struct setting *	setting,
		void *	data,
		size_t	len
	)			[static]

Fetch value of SMBIOS setting.

Parameters:

	settings	Settings block, or NULL to search all blocks
	setting	Setting to fetch
	data	Buffer to fill with setting data
	len	Length of buffer

Return values:

len

Length of setting data, or negative error

Definition at line 75 of file smbios_settings.c.

References ENOENT, find_smbios_structure(), smbios_structure::header, smbios_header::len, memcpy, read_smbios_string(), read_smbios_structure(), SMBIOS_TAG_MAGIC, and setting::tag.

                                                   {
        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;
                }
        }
}

static void smbios_init

(

void

)

[static]

Initialise SMBIOS settings.

Definition at line 136 of file smbios_settings.c.

References DBG, NULL, register_settings(), and strerror().

                                 {
        int rc;

        if ( ( rc = register_settings ( &smbios_settings, NULL ) ) != 0 ) {
                DBG ( "SMBIOS could not register settings: %s\n",
                      strerror ( rc ) );
                return;
        }
}

struct init_fn smbios_init_fn __init_fn

(

INIT_NORMAL

)

[read]

SMBIOS settings initialiser.

---

Variable Documentation

struct settings_operations smbios_settings_operations [static]

Initial value:

 {
        .fetch = smbios_fetch,
}

SMBIOS settings operations.

Definition at line 121 of file smbios_settings.c.

struct settings smbios_settings [static]

Initial value:

 {
        .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,
}

SMBIOS settings.

Definition at line 126 of file smbios_settings.c.