1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
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.
6 *
7 * Holds initial configuration information for devices.
8 *
9 * Version: @(#)Space.c 1.0.7 08/12/93
10 *
11 * Authors: Ross Biro
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 * Donald J. Becker, <becker@scyld.com>
14 *
15 * Changelog:
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.
25 */
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>
32
33 /*
34 * This structure holds boot-time configured netdevice settings. They
35 * are then used in the device probing.
36 */
37 struct netdev_boot_setup {
38 char name[IFNAMSIZ];
39 struct ifmap map;
40 };
41 #define NETDEV_BOOT_SETUP_MAX 8
42
43
44 /******************************************************************************
45 *
46 * Device Boot-time Settings Routines
47 *
48 ******************************************************************************/
49
50 /* Boot time configuration table */
51 static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX];
52
53 /**
54 * netdev_boot_setup_add - add new setup entry
55 * @name: name of the device
56 * @map: configured settings for the device
57 *
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
60 * all netdevices.
61 */
netdev_boot_setup_add(char * name,struct ifmap * map)62 static int netdev_boot_setup_add(char *name, struct ifmap *map)
63 {
64 struct netdev_boot_setup *s;
65 int i;
66
67 s = dev_boot_setup;
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 strscpy(s[i].name, name, IFNAMSIZ);
72 memcpy(&s[i].map, map, sizeof(s[i].map));
73 break;
74 }
75 }
76
77 return i >= NETDEV_BOOT_SETUP_MAX ? 0 : 1;
78 }
79
80 /**
81 * netdev_boot_setup_check - check boot time settings
82 * @dev: the netdevice
83 *
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.
88 */
netdev_boot_setup_check(struct net_device * dev)89 int netdev_boot_setup_check(struct net_device *dev)
90 {
91 struct netdev_boot_setup *s = dev_boot_setup;
92 int i;
93
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;
101 return 1;
102 }
103 }
104 return 0;
105 }
106 EXPORT_SYMBOL(netdev_boot_setup_check);
107
108 /**
109 * netdev_boot_base - get address from boot time settings
110 * @prefix: prefix for network device
111 * @unit: id for network device
112 *
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.
117 */
netdev_boot_base(const char * prefix,int unit)118 static unsigned long netdev_boot_base(const char *prefix, int unit)
119 {
120 const struct netdev_boot_setup *s = dev_boot_setup;
121 char name[IFNAMSIZ];
122 int i;
123
124 sprintf(name, "%s%d", prefix, unit);
125
126 /*
127 * If device already registered then return base of 1
128 * to indicate not to probe for this interface
129 */
130 if (__dev_get_by_name(&init_net, name))
131 return 1;
132
133 for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++)
134 if (!strcmp(name, s[i].name))
135 return s[i].map.base_addr;
136 return 0;
137 }
138
139 /*
140 * Saves at boot time configured settings for any netdevice.
141 */
netdev_boot_setup(char * str)142 static int __init netdev_boot_setup(char *str)
143 {
144 int ints[5];
145 struct ifmap map;
146
147 str = get_options(str, ARRAY_SIZE(ints), ints);
148 if (!str || !*str)
149 return 0;
150
151 /* Save settings */
152 memset(&map, 0, sizeof(map));
153 if (ints[0] > 0)
154 map.irq = ints[1];
155 if (ints[0] > 1)
156 map.base_addr = ints[2];
157 if (ints[0] > 2)
158 map.mem_start = ints[3];
159 if (ints[0] > 3)
160 map.mem_end = ints[4];
161
162 /* Add new entry to the list */
163 return netdev_boot_setup_add(str, &map);
164 }
165
166 __setup("netdev=", netdev_boot_setup);
167
ether_boot_setup(char * str)168 static int __init ether_boot_setup(char *str)
169 {
170 return netdev_boot_setup(str);
171 }
172 __setup("ether=", ether_boot_setup);
173
174
175 /* A unified ethernet device probe. This is the easiest way to have every
176 * ethernet adaptor have the name "eth[0123...]".
177 */
178
179 struct devprobe2 {
180 struct net_device *(*probe)(int unit);
181 int status; /* non-zero if autoprobe has failed */
182 };
183
probe_list2(int unit,struct devprobe2 * p,int autoprobe)184 static int __init probe_list2(int unit, struct devprobe2 *p, int autoprobe)
185 {
186 struct net_device *dev;
187
188 for (; p->probe; p++) {
189 if (autoprobe && p->status)
190 continue;
191 dev = p->probe(unit);
192 if (!IS_ERR(dev))
193 return 0;
194 if (autoprobe)
195 p->status = PTR_ERR(dev);
196 }
197 return -ENODEV;
198 }
199
200 /* ISA probes that touch addresses < 0x400 (including those that also
201 * look for EISA/PCI cards in addition to ISA cards).
202 */
203 static struct devprobe2 isa_probes[] __initdata = {
204 #ifdef CONFIG_3C515
205 {tc515_probe, 0},
206 #endif
207 #ifdef CONFIG_ULTRA
208 {ultra_probe, 0},
209 #endif
210 #ifdef CONFIG_WD80x3
211 {wd_probe, 0},
212 #endif
213 #if defined(CONFIG_NE2000) /* ISA (use ne2k-pci for PCI cards) */
214 {ne_probe, 0},
215 #endif
216 #ifdef CONFIG_LANCE /* ISA/VLB (use pcnet32 for PCI cards) */
217 {lance_probe, 0},
218 #endif
219 #ifdef CONFIG_SMC9194
220 {smc_init, 0},
221 #endif
222 #ifdef CONFIG_CS89x0_ISA
223 {cs89x0_probe, 0},
224 #endif
225 {NULL, 0},
226 };
227
228 /* Unified ethernet device probe, segmented per architecture and
229 * per bus interface. This drives the legacy devices only for now.
230 */
231
ethif_probe2(int unit)232 static void __init ethif_probe2(int unit)
233 {
234 unsigned long base_addr = netdev_boot_base("eth", unit);
235
236 if (base_addr == 1)
237 return;
238
239 probe_list2(unit, isa_probes, base_addr == 0);
240 }
241
242 /* Statically configured drivers -- order matters here. */
net_olddevs_init(void)243 static int __init net_olddevs_init(void)
244 {
245 int num;
246
247 for (num = 0; num < 8; ++num)
248 ethif_probe2(num);
249
250 #ifdef CONFIG_COPS
251 cops_probe(0);
252 cops_probe(1);
253 cops_probe(2);
254 #endif
255
256 return 0;
257 }
258
259 device_initcall(net_olddevs_init);
260
