1 /*
2 * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 FILE_LICENCE ( GPL2_OR_LATER );
20
21 #include <string.h>
22 #include <errno.h>
23 #include <byteswap.h>
24 #include <gpxe/dhcp.h>
25 #include <gpxe/settings.h>
26 #include <gpxe/device.h>
27 #include <gpxe/netdevice.h>
28
29 /** @file
30 *
31 * Network device configuration settings
32 *
33 */
34
35 /** Network device named settings */
36 struct setting mac_setting __setting = {
37 .name = "mac",
38 .description = "MAC address",
39 .type = &setting_type_hex,
40 };
41 struct setting busid_setting __setting = {
42 .name = "busid",
43 .description = "Bus ID",
44 .type = &setting_type_hex,
45 };
46
47 /**
48 * Store value of network device setting
49 *
50 * @v settings Settings block
51 * @v setting Setting to store
52 * @v data Setting data, or NULL to clear setting
53 * @v len Length of setting data
54 * @ret rc Return status code
55 */
netdev_store(struct settings * settings,struct setting * setting,const void * data,size_t len)56 static int netdev_store ( struct settings *settings, struct setting *setting,
57 const void *data, size_t len ) {
58 struct net_device *netdev = container_of ( settings, struct net_device,
59 settings.settings );
60
61 if ( setting_cmp ( setting, &mac_setting ) == 0 ) {
62 if ( len != netdev->ll_protocol->ll_addr_len )
63 return -EINVAL;
64 memcpy ( netdev->ll_addr, data, len );
65 return 0;
66 }
67
68 return generic_settings_store ( settings, setting, data, len );
69 }
70
71 /**
72 * Fetch value of network device setting
73 *
74 * @v settings Settings block
75 * @v setting Setting to fetch
76 * @v data Setting data, or NULL to clear setting
77 * @v len Length of setting data
78 * @ret rc Return status code
79 */
netdev_fetch(struct settings * settings,struct setting * setting,void * data,size_t len)80 static int netdev_fetch ( struct settings *settings, struct setting *setting,
81 void *data, size_t len ) {
82 struct net_device *netdev = container_of ( settings, struct net_device,
83 settings.settings );
84 struct device_description *desc = &netdev->dev->desc;
85 struct dhcp_netdev_desc dhcp_desc;
86
87 if ( setting_cmp ( setting, &mac_setting ) == 0 ) {
88 if ( len > netdev->ll_protocol->ll_addr_len )
89 len = netdev->ll_protocol->ll_addr_len;
90 memcpy ( data, netdev->ll_addr, len );
91 return netdev->ll_protocol->ll_addr_len;
92 }
93 if ( setting_cmp ( setting, &busid_setting ) == 0 ) {
94 dhcp_desc.type = desc->bus_type;
95 dhcp_desc.vendor = htons ( desc->vendor );
96 dhcp_desc.device = htons ( desc->device );
97 if ( len > sizeof ( dhcp_desc ) )
98 len = sizeof ( dhcp_desc );
99 memcpy ( data, &dhcp_desc, len );
100 return sizeof ( dhcp_desc );
101 }
102
103 return generic_settings_fetch ( settings, setting, data, len );
104 }
105
106 /**
107 * Clear network device settings
108 *
109 * @v settings Settings block
110 */
netdev_clear(struct settings * settings)111 static void netdev_clear ( struct settings *settings ) {
112 generic_settings_clear ( settings );
113 }
114
115 /** Network device configuration settings operations */
116 struct settings_operations netdev_settings_operations = {
117 .store = netdev_store,
118 .fetch = netdev_fetch,
119 .clear = netdev_clear,
120 };
121