254 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * INET An implementation of the TCP/IP protocol suite for the LINUX4 * operating system. INET is implemented using the BSD Socket5 * 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 08/12/9310 *11 * Authors: Ross Biro12 * 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 allocation18 * Paul Gortmaker (03/2002)19 * - struct init cleanup, enable multiple ISA autoprobes.20 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 09/199921 * - fix sbni: s/device/net_device/22 * Paul Gortmaker (06/98):23 * - sort probes in a sane way, make sure all (safe) probes24 * 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. They35 * are then used in the device probing.36 */37struct netdev_boot_setup {38 char name[IFNAMSIZ];39 struct ifmap map;40};41#define NETDEV_BOOT_SETUP_MAX 842 43 44/******************************************************************************45 *46 * Device Boot-time Settings Routines47 *48 ******************************************************************************/49 50/* Boot time configuration table */51static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX];52 53/**54 * netdev_boot_setup_add - add new setup entry55 * @name: name of the device56 * @map: configured settings for the device57 *58 * Adds new setup entry to the dev_boot_setup list. The function59 * returns 0 on error and 1 on success. This is a generic routine to60 * all netdevices.61 */62static 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 settings82 * @dev: the netdevice83 *84 * Check boot time settings for the device.85 * The found settings are set for the device to be used86 * later in the device probing.87 * Returns 0 if no settings found, 1 if they are.88 */89int 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}106EXPORT_SYMBOL(netdev_boot_setup_check);107 108/**109 * netdev_boot_base - get address from boot time settings110 * @prefix: prefix for network device111 * @unit: id for network device112 *113 * Check boot time settings for the base address of device.114 * The found settings are set for the device to be used115 * later in the device probing.116 * Returns 0 if no settings found.117 */118static 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 1128 * to indicate not to probe for this interface129 */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 */142static 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 168static 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 every176 * ethernet adaptor have the name "eth[0123...]".177 */178 179struct devprobe2 {180 struct net_device *(*probe)(int unit);181 int status; /* non-zero if autoprobe has failed */182};183 184static 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 also201 * look for EISA/PCI cards in addition to ISA cards).202 */203static struct devprobe2 isa_probes[] __initdata = {204#ifdef CONFIG_3C515205 {tc515_probe, 0},206#endif207#ifdef CONFIG_ULTRA208 {ultra_probe, 0},209#endif210#ifdef CONFIG_WD80x3211 {wd_probe, 0},212#endif213#if defined(CONFIG_NE2000) /* ISA (use ne2k-pci for PCI cards) */214 {ne_probe, 0},215#endif216#ifdef CONFIG_LANCE /* ISA/VLB (use pcnet32 for PCI cards) */217 {lance_probe, 0},218#endif219#ifdef CONFIG_SMC9194220 {smc_init, 0},221#endif222#ifdef CONFIG_CS89x0_ISA223 {cs89x0_probe, 0},224#endif225 {NULL, 0},226};227 228/* Unified ethernet device probe, segmented per architecture and229 * per bus interface. This drives the legacy devices only for now.230 */231 232static 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. */243static 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 253device_initcall(net_olddevs_init);254