1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
7 * Holds initial configuration information for devices.
9 * Version: @(#)Space.c 1.0.7 08/12/93
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 * Donald J. Becker, <becker@scyld.com>
16 * Stephen Hemminger (09/2003)
17 * - get rid of pre-linked dev list, dynamic device allocation
18 * Paul Gortmaker (03/2002)
19 * - struct init cleanup, enable multiple ISA autoprobes.
20 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 09/1999
21 * - fix sbni: s/device/net_device/
22 * Paul Gortmaker (06/98):
23 * - sort probes in a sane way, make sure all (safe) probes
24 * get run once & failed autoprobes don't autoprobe again.
26 #include <linux/netdevice.h>
27 #include <linux/etherdevice.h>
28 #include <linux/errno.h>
29 #include <linux/init.h>
30 #include <linux/netlink.h>
31 #include <net/Space.h>
34 * This structure holds boot-time configured netdevice settings. They
35 * are then used in the device probing.
37 struct netdev_boot_setup {
41 #define NETDEV_BOOT_SETUP_MAX 8
44 /******************************************************************************
46 * Device Boot-time Settings Routines
48 ******************************************************************************/
50 /* Boot time configuration table */
51 static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX];
54 * netdev_boot_setup_add - add new setup entry
55 * @name: name of the device
56 * @map: configured settings for the device
58 * Adds new setup entry to the dev_boot_setup list. The function
59 * returns 0 on error and 1 on success. This is a generic routine to
62 static int netdev_boot_setup_add(char *name, struct ifmap *map)
64 struct netdev_boot_setup *s;
68 for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
69 if (s[i].name[0] == '\0' || s[i].name[0] == ' ') {
70 memset(s[i].name, 0, sizeof(s[i].name));
71 strlcpy(s[i].name, name, IFNAMSIZ);
72 memcpy(&s[i].map, map, sizeof(s[i].map));
77 return i >= NETDEV_BOOT_SETUP_MAX ? 0 : 1;
81 * netdev_boot_setup_check - check boot time settings
84 * Check boot time settings for the device.
85 * The found settings are set for the device to be used
86 * later in the device probing.
87 * Returns 0 if no settings found, 1 if they are.
89 int netdev_boot_setup_check(struct net_device *dev)
91 struct netdev_boot_setup *s = dev_boot_setup;
94 for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
95 if (s[i].name[0] != '\0' && s[i].name[0] != ' ' &&
96 !strcmp(dev->name, s[i].name)) {
97 dev->irq = s[i].map.irq;
98 dev->base_addr = s[i].map.base_addr;
99 dev->mem_start = s[i].map.mem_start;
100 dev->mem_end = s[i].map.mem_end;
106 EXPORT_SYMBOL(netdev_boot_setup_check);
109 * netdev_boot_base - get address from boot time settings
110 * @prefix: prefix for network device
111 * @unit: id for network device
113 * Check boot time settings for the base address of device.
114 * The found settings are set for the device to be used
115 * later in the device probing.
116 * Returns 0 if no settings found.
118 static unsigned long netdev_boot_base(const char *prefix, int unit)
120 const struct netdev_boot_setup *s = dev_boot_setup;
124 sprintf(name, "%s%d", prefix, unit);
127 * If device already registered then return base of 1
128 * to indicate not to probe for this interface
130 if (__dev_get_by_name(&init_net, name))
133 for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++)
134 if (!strcmp(name, s[i].name))
135 return s[i].map.base_addr;
140 * Saves at boot time configured settings for any netdevice.
142 static int __init netdev_boot_setup(char *str)
147 str = get_options(str, ARRAY_SIZE(ints), ints);
152 memset(&map, 0, sizeof(map));
156 map.base_addr = ints[2];
158 map.mem_start = ints[3];
160 map.mem_end = ints[4];
162 /* Add new entry to the list */
163 return netdev_boot_setup_add(str, &map);
166 __setup("netdev=", netdev_boot_setup);
168 static int __init ether_boot_setup(char *str)
170 return netdev_boot_setup(str);
172 __setup("ether=", ether_boot_setup);
175 /* A unified ethernet device probe. This is the easiest way to have every
176 * ethernet adaptor have the name "eth[0123...]".
180 struct net_device *(*probe)(int unit);
181 int status; /* non-zero if autoprobe has failed */
184 static int __init probe_list2(int unit, struct devprobe2 *p, int autoprobe)
186 struct net_device *dev;
188 for (; p->probe; p++) {
189 if (autoprobe && p->status)
191 dev = p->probe(unit);
195 p->status = PTR_ERR(dev);
200 /* ISA probes that touch addresses < 0x400 (including those that also
201 * look for EISA/PCI cards in addition to ISA cards).
203 static struct devprobe2 isa_probes[] __initdata = {
213 #if defined(CONFIG_NE2000) /* ISA (use ne2k-pci for PCI cards) */
216 #ifdef CONFIG_LANCE /* ISA/VLB (use pcnet32 for PCI cards) */
219 #ifdef CONFIG_SMC9194
222 #ifdef CONFIG_CS89x0_ISA
231 /* Unified ethernet device probe, segmented per architecture and
232 * per bus interface. This drives the legacy devices only for now.
235 static void __init ethif_probe2(int unit)
237 unsigned long base_addr = netdev_boot_base("eth", unit);
242 probe_list2(unit, isa_probes, base_addr == 0);
245 /* Statically configured drivers -- order matters here. */
246 static int __init net_olddevs_init(void)
250 for (num = 0; num < 8; ++num)
262 device_initcall(net_olddevs_init);