260 lines
6.2 KiB
C
260 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Holds initial configuration information for devices.
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*
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* Version: @(#)Space.c 1.0.7 08/12/93
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*
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* Authors: Ross Biro
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Donald J. Becker, <becker@scyld.com>
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*
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* Changelog:
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* Stephen Hemminger (09/2003)
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* - get rid of pre-linked dev list, dynamic device allocation
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* Paul Gortmaker (03/2002)
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* - struct init cleanup, enable multiple ISA autoprobes.
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* Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 09/1999
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* - fix sbni: s/device/net_device/
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* Paul Gortmaker (06/98):
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* - sort probes in a sane way, make sure all (safe) probes
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* get run once & failed autoprobes don't autoprobe again.
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*/
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/netlink.h>
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#include <net/Space.h>
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/*
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* This structure holds boot-time configured netdevice settings. They
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* are then used in the device probing.
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*/
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struct netdev_boot_setup {
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char name[IFNAMSIZ];
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struct ifmap map;
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};
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#define NETDEV_BOOT_SETUP_MAX 8
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/******************************************************************************
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*
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* Device Boot-time Settings Routines
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*
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******************************************************************************/
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/* Boot time configuration table */
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static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX];
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/**
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* netdev_boot_setup_add - add new setup entry
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* @name: name of the device
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* @map: configured settings for the device
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*
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* Adds new setup entry to the dev_boot_setup list. The function
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* returns 0 on error and 1 on success. This is a generic routine to
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* all netdevices.
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*/
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static int netdev_boot_setup_add(char *name, struct ifmap *map)
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{
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struct netdev_boot_setup *s;
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int i;
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s = dev_boot_setup;
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for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
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if (s[i].name[0] == '\0' || s[i].name[0] == ' ') {
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memset(s[i].name, 0, sizeof(s[i].name));
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strlcpy(s[i].name, name, IFNAMSIZ);
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memcpy(&s[i].map, map, sizeof(s[i].map));
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break;
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}
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}
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return i >= NETDEV_BOOT_SETUP_MAX ? 0 : 1;
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}
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/**
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* netdev_boot_setup_check - check boot time settings
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* @dev: the netdevice
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*
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* Check boot time settings for the device.
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* The found settings are set for the device to be used
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* later in the device probing.
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* Returns 0 if no settings found, 1 if they are.
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*/
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int netdev_boot_setup_check(struct net_device *dev)
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{
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struct netdev_boot_setup *s = dev_boot_setup;
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int i;
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for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
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if (s[i].name[0] != '\0' && s[i].name[0] != ' ' &&
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!strcmp(dev->name, s[i].name)) {
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dev->irq = s[i].map.irq;
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dev->base_addr = s[i].map.base_addr;
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dev->mem_start = s[i].map.mem_start;
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dev->mem_end = s[i].map.mem_end;
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return 1;
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}
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}
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return 0;
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}
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EXPORT_SYMBOL(netdev_boot_setup_check);
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/**
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* netdev_boot_base - get address from boot time settings
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* @prefix: prefix for network device
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* @unit: id for network device
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*
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* Check boot time settings for the base address of device.
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* The found settings are set for the device to be used
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* later in the device probing.
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* Returns 0 if no settings found.
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*/
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static unsigned long netdev_boot_base(const char *prefix, int unit)
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{
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const struct netdev_boot_setup *s = dev_boot_setup;
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char name[IFNAMSIZ];
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int i;
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sprintf(name, "%s%d", prefix, unit);
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/*
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* If device already registered then return base of 1
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* to indicate not to probe for this interface
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*/
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if (__dev_get_by_name(&init_net, name))
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return 1;
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for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++)
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if (!strcmp(name, s[i].name))
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return s[i].map.base_addr;
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return 0;
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}
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/*
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* Saves at boot time configured settings for any netdevice.
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*/
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static int __init netdev_boot_setup(char *str)
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{
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int ints[5];
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struct ifmap map;
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str = get_options(str, ARRAY_SIZE(ints), ints);
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if (!str || !*str)
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return 0;
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/* Save settings */
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memset(&map, 0, sizeof(map));
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if (ints[0] > 0)
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map.irq = ints[1];
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if (ints[0] > 1)
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map.base_addr = ints[2];
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if (ints[0] > 2)
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map.mem_start = ints[3];
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if (ints[0] > 3)
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map.mem_end = ints[4];
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/* Add new entry to the list */
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return netdev_boot_setup_add(str, &map);
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}
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__setup("netdev=", netdev_boot_setup);
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static int __init ether_boot_setup(char *str)
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{
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return netdev_boot_setup(str);
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}
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__setup("ether=", ether_boot_setup);
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/* A unified ethernet device probe. This is the easiest way to have every
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* ethernet adaptor have the name "eth[0123...]".
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*/
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struct devprobe2 {
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struct net_device *(*probe)(int unit);
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int status; /* non-zero if autoprobe has failed */
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};
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static int __init probe_list2(int unit, struct devprobe2 *p, int autoprobe)
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{
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struct net_device *dev;
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for (; p->probe; p++) {
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if (autoprobe && p->status)
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continue;
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dev = p->probe(unit);
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if (!IS_ERR(dev))
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return 0;
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if (autoprobe)
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p->status = PTR_ERR(dev);
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}
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return -ENODEV;
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}
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/* ISA probes that touch addresses < 0x400 (including those that also
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* look for EISA/PCI cards in addition to ISA cards).
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*/
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static struct devprobe2 isa_probes[] __initdata = {
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#ifdef CONFIG_3C515
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{tc515_probe, 0},
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#endif
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#ifdef CONFIG_ULTRA
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{ultra_probe, 0},
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#endif
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#ifdef CONFIG_WD80x3
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{wd_probe, 0},
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#endif
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#if defined(CONFIG_NE2000) /* ISA (use ne2k-pci for PCI cards) */
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{ne_probe, 0},
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#endif
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#ifdef CONFIG_LANCE /* ISA/VLB (use pcnet32 for PCI cards) */
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{lance_probe, 0},
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#endif
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#ifdef CONFIG_SMC9194
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{smc_init, 0},
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#endif
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#ifdef CONFIG_CS89x0_ISA
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{cs89x0_probe, 0},
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#endif
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{NULL, 0},
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};
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/* Unified ethernet device probe, segmented per architecture and
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* per bus interface. This drives the legacy devices only for now.
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*/
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static void __init ethif_probe2(int unit)
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{
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unsigned long base_addr = netdev_boot_base("eth", unit);
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if (base_addr == 1)
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return;
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probe_list2(unit, isa_probes, base_addr == 0);
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}
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/* Statically configured drivers -- order matters here. */
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static int __init net_olddevs_init(void)
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{
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int num;
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for (num = 0; num < 8; ++num)
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ethif_probe2(num);
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#ifdef CONFIG_COPS
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cops_probe(0);
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cops_probe(1);
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cops_probe(2);
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#endif
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return 0;
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}
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device_initcall(net_olddevs_init);
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