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 */ 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 */ 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 */ 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 */ 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); 167 168 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 }; 183 184 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 */ 231 232 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. */ 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 return 0; 251 } 252 253 device_initcall(net_olddevs_init); 254