/*
* 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.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <string.h>
#include <errno.h>
#include <byteswap.h>
#include <ipxe/dhcp.h>
#include <ipxe/dhcpopts.h>
#include <ipxe/settings.h>
#include <ipxe/device.h>
#include <ipxe/netdevice.h>
/** @file
*
* Network device configuration settings
*
*/
/** Network device named settings */
struct setting mac_setting __setting ( SETTING_NETDEV ) = {
.name = "mac",
.description = "MAC address",
.type = &setting_type_hex,
};
struct setting busid_setting __setting ( SETTING_NETDEV ) = {
.name = "busid",
.description = "Bus ID",
.type = &setting_type_hex,
};
struct setting chip_setting __setting ( SETTING_NETDEV ) = {
.name = "chip",
.description = "Chip",
.type = &setting_type_string,
};
/**
* Store MAC address setting
*
* @v netdev Network device
* @v data Setting data, or NULL to clear setting
* @v len Length of setting data
* @ret rc Return status code
*/
static int netdev_store_mac ( struct net_device *netdev,
const void *data, size_t len ) {
if ( len != netdev->ll_protocol->ll_addr_len )
return -EINVAL;
memcpy ( netdev->ll_addr, data, len );
return 0;
}
/**
* Fetch MAC address setting
*
* @v netdev Network device
* @v data Buffer to fill with setting data
* @v len Length of buffer
* @ret len Length of setting data, or negative error
*/
static int netdev_fetch_mac ( struct net_device *netdev, void *data,
size_t len ) {
if ( len > netdev->ll_protocol->ll_addr_len )
len = netdev->ll_protocol->ll_addr_len;
memcpy ( data, netdev->ll_addr, len );
return netdev->ll_protocol->ll_addr_len;
}
/**
* Fetch bus ID setting
*
* @v netdev Network device
* @v data Buffer to fill with setting data
* @v len Length of buffer
* @ret len Length of setting data, or negative error
*/
static int netdev_fetch_busid ( struct net_device *netdev, void *data,
size_t len ) {
struct device_description *desc = &netdev->dev->desc;
struct dhcp_netdev_desc dhcp_desc;
dhcp_desc.type = desc->bus_type;
dhcp_desc.vendor = htons ( desc->vendor );
dhcp_desc.device = htons ( desc->device );
if ( len > sizeof ( dhcp_desc ) )
len = sizeof ( dhcp_desc );
memcpy ( data, &dhcp_desc, len );
return sizeof ( dhcp_desc );
}
/**
* Fetch chip setting
*
* @v netdev Network device
* @v data Buffer to fill with setting data
* @v len Length of buffer
* @ret len Length of setting data, or negative error
*/
static int netdev_fetch_chip ( struct net_device *netdev, void *data,
size_t len ) {
const char *chip = netdev->dev->driver_name;
strncpy ( data, chip, len );
return strlen ( chip );
}
/** A network device setting operation */
struct netdev_setting_operation {
/** Setting */
struct setting *setting;
/** Store setting (or NULL if not supported)
*
* @v netdev Network device
* @v data Setting data, or NULL to clear setting
* @v len Length of setting data
* @ret rc Return status code
*/
int ( * store ) ( struct net_device *netdev, const void *data,
size_t len );
/** Fetch setting
*
* @v netdev Network device
* @v data Buffer to fill with setting data
* @v len Length of buffer
* @ret len Length of setting data, or negative error
*/
int ( * fetch ) ( struct net_device *netdev, void *data, size_t len );
};
/** Network device settings */
static struct netdev_setting_operation netdev_setting_operations[] = {
{ &mac_setting, netdev_store_mac, netdev_fetch_mac },
{ &busid_setting, NULL, netdev_fetch_busid },
{ &chip_setting, NULL, netdev_fetch_chip },
};
/**
* Store value of network device 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 netdev_store ( struct settings *settings, struct setting *setting,
const void *data, size_t len ) {
struct net_device *netdev = container_of ( settings, struct net_device,
settings.settings );
struct netdev_setting_operation *op;
unsigned int i;
/* Handle network device-specific settings */
for ( i = 0 ; i < ( sizeof ( netdev_setting_operations ) /
sizeof ( netdev_setting_operations[0] ) ) ; i++ ) {
op = &netdev_setting_operations[i];
if ( setting_cmp ( setting, op->setting ) == 0 ) {
if ( op->store ) {
return op->store ( netdev, data, len );
} else {
return -ENOTSUP;
}
}
}
return generic_settings_store ( settings, setting, data, len );
}
/**
* Fetch value of network device setting
*
* @v settings Settings block
* @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 netdev_fetch ( struct settings *settings, struct setting *setting,
void *data, size_t len ) {
struct net_device *netdev = container_of ( settings, struct net_device,
settings.settings );
struct netdev_setting_operation *op;
unsigned int i;
/* Handle network device-specific settings */
for ( i = 0 ; i < ( sizeof ( netdev_setting_operations ) /
sizeof ( netdev_setting_operations[0] ) ) ; i++ ) {
op = &netdev_setting_operations[i];
if ( setting_cmp ( setting, op->setting ) == 0 )
return op->fetch ( netdev, data, len );
}
return generic_settings_fetch ( settings, setting, data, len );
}
/**
* Clear network device settings
*
* @v settings Settings block
*/
static void netdev_clear ( struct settings *settings ) {
generic_settings_clear ( settings );
}
/** Network device configuration settings operations */
struct settings_operations netdev_settings_operations = {
.store = netdev_store,
.fetch = netdev_fetch,
.clear = netdev_clear,
};
