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Diffstat (limited to 'recipes/net-tools/files/mii-diag.c')
-rw-r--r-- | recipes/net-tools/files/mii-diag.c | 650 |
1 files changed, 650 insertions, 0 deletions
diff --git a/recipes/net-tools/files/mii-diag.c b/recipes/net-tools/files/mii-diag.c new file mode 100644 index 0000000000..17d8bef63b --- /dev/null +++ b/recipes/net-tools/files/mii-diag.c @@ -0,0 +1,650 @@ +/* Mode: C; + * mii-diag.c: Examine and set the MII registers of a network interfaces. + + Usage: mii-diag [-vw] interface. + + This program reads and writes the Media Independent Interface (MII) + management registers on network transceivers. The registers control + and report network link settings and errors. Examples are link speed, + duplex, capabilities advertised to the link partner, status LED + indications and link error counters. + + Notes: + The compile-command is at the end of this source file. + This program works with drivers that implement MII ioctl() calls. + + Written/copyright 1997-2003 by Donald Becker <becker@scyld.com> + + This program is free software; you can redistribute it + and/or modify it under the terms of the GNU General Public + License as published by the Free Software Foundation. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 914 Bay Ridge Road, Suite 220 + Annapolis MD 21403 + + References + http://scyld.com/expert/mii-status.html + http://scyld.com/expert/NWay.html + http://www.national.com/pf/DP/DP83840.html +*/ + +static char version[] = +"mii-diag.c:v2.11 3/21/2005 Donald Becker (becker@scyld.com)\n" +" http://www.scyld.com/diag/index.html\n"; + +static const char usage_msg[] = +"Usage: %s [--help] [-aDfrRvVw] [-AF <speed+duplex>] [--watch] <interface>.\n"; +static const char long_usage_msg[] = +"Usage: %s [-aDfrRvVw] [-AF <speed+duplex>] [--watch] <interface>.\n\ +\n\ + This program configures and monitors the transceiver management registers\n\ + for network interfaces. It uses the Media Independent Interface (MII)\n\ + standard with additional Linux-specific controls to communicate with the\n\ + underlying device driver. The MII registers control and report network\n\ + link settings and errors. Examples are link speed, duplex, capabilities\n\ + advertised to the link partner, status LED indications and link error\n\ + counters.\n\ +\n\ + The common usage is\n\ + mii-diag eth0\n\ +\n\ + The default interface is \"eth0\".\n\ + Frequently used options are\n\ + -A --advertise <speed|setting>\n\ + -F --fixed-speed <speed>\n\ + Speed is one of: 100baseT4, 100baseTx, 100baseTx-FD, 100baseTx-HD,\n\ + 10baseT, 10baseT-FD, 10baseT-HD\n\ + -s --status Return exit status 2 if there is no link beat.\n\ +\n\ + Less frequently used options are\n\ + -a --all-interfaces Show the status all interfaces\n\ + (Not recommended with options that change settings.)\n\ + -D --debug\n\ + -g --read-parameters Get driver-specific parameters.\n\ + -G --set-parameters PARMS Set driver-specific parameters.\n\ + Parameters are comma separated, missing parameters retain\n\ + their previous values.\n\ + -M --msg-level LEVEL Set the driver message bit map.\n\ + -p --phy ADDR Set the PHY (MII address) to report.\n\ + -r --restart Restart the link autonegotiation.\n\ + -R --reset Reset the transceiver.\n\ + -v --verbose Report each action taken.\n\ + -V --version Emit version information.\n\ + -w --watch Continuously monitor the transceiver and report changes.\n\ +\n\ + This command returns success (zero) if the interface information can be\n\ + read. If the --status option is passed, a zero return means that the\n\ + interface has link beat.\n\ +"; + +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <ctype.h> +#include <string.h> +#include <errno.h> +#include <fcntl.h> +#include <getopt.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/ioctl.h> +#include <net/if.h> +#ifdef use_linux_libc5 +#include <linux/if_arp.h> +#include <linux/if_ether.h> +#endif + +typedef u_int32_t u32; +typedef u_int16_t u16; +typedef u_int8_t u8; + +#if defined(SIOCGPARAMS) && SIOCGPARAMS != SIOCDEVPRIVATE+3 +#error Changed definition for SIOCGPARAMS +#else +#define SIOCGPARAMS (SIOCDEVPRIVATE+3) /* Read operational parameters. */ +#define SIOCSPARAMS (SIOCDEVPRIVATE+4) /* Set operational parameters. */ +#endif + +const char shortopts[] = "aA:C:DfF:gG:hmM:p:rRsvVw?"; +struct option longopts[] = { + /* { name has_arg *flag val } */ + {"all-interfaces", 0, 0, 'a'}, /* Show all interfaces. */ + {"advertise", 1, 0, 'A'}, /* Change the capabilities advertised. */ + {"BMCR", 1, 0, 'C'}, /* Set the control register. */ + {"debug", 0, 0, 'D'}, /* Increase the debug level. */ + {"force", 0, 0, 'f'}, /* Force the operation. */ + {"fixed-speed", 1, 0, 'F'}, /* Fixed speed name. */ + {"read-parameters", 0, 0, 'g'}, /* Show general settings values. */ + {"set-parameters", 1, 0, 'G'}, /* Write general settings values. */ + {"help", 0, 0, 'h'}, /* Print a long usage message. */ + {"monitor", 0, 0, 'm'}, /* Monitor status register. */ + {"msg-level", 1, 0, 'M'}, /* Set the driver message level. */ + {"phy", 1, 0, 'p'}, /* Set the PHY (MII address) to report. */ + {"restart", 0, 0, 'r'}, /* Restart the link negotiation */ + {"reset", 0, 0, 'R'}, /* Reset the transceiver. */ + {"status", 0, 0, 's'}, /* Non-zero exit status w/ no link beat. */ + {"verbose", 0, 0, 'v'}, /* Report each action taken. */ + {"version", 0, 0, 'V'}, /* Emit version information. */ + {"watch", 0, 0, 'w'}, /* Constantly monitor the port. */ + {"error", 0, 0, '?'}, /* Return the error message. */ + { 0, 0, 0, 0 } +}; + +/* Usually in libmii.c, but trivial substitions are below. */ +extern int show_mii_details(long ioaddr, int phy_id); +extern void monitor_mii(long ioaddr, int phy_id); +int show_mii_details(long ioaddr, int phy_id) __attribute__((weak)); +void monitor_mii(long ioaddr, int phy_id) __attribute__((weak)); + + +/* Command-line flags. */ +unsigned int opt_a = 0, /* Show-all-interfaces flag. */ + opt_f = 0, /* Force the operation. */ + opt_g = 0, + opt_G = 0, + verbose = 0, /* Verbose flag. */ + debug = 0, + opt_version = 0, + opt_restart = 0, + opt_reset = 0, + opt_status = 0, + opt_watch = 0; +static int msg_level = -1; +static int set_BMCR = -1; +static int nway_advertise = 0; +static int fixed_speed = -1; +static int override_phy = -1; +char *opt_G_string = NULL; + +/* Internal values. */ +int new_ioctl_nums; +int skfd = -1; /* AF_INET socket for ioctl() calls. */ +struct ifreq ifr; + +int do_one_xcvr(int skfd); +int show_basic_mii(long ioaddr, int phy_id); +int mdio_read(int skfd, int phy_id, int location); +void mdio_write(int skfd, int phy_id, int location, int value); +static int parse_advertise(const char *capabilities); +static void monitor_status(long ioaddr, int phy_id); + + +int +main(int argc, char **argv) +{ + int c, errflag = 0; + char **spp, *ifname; + char *progname = rindex(argv[0], '/') ? rindex(argv[0], '/')+1 : argv[0]; + + while ((c = getopt_long(argc, argv, shortopts, longopts, 0)) != EOF) + switch (c) { + case 'a': opt_a++; break; + case 'A': nway_advertise |= parse_advertise(optarg); + if (nway_advertise == -1) errflag++; + break; + case 'C': set_BMCR = strtoul(optarg, NULL, 16); break; + case 'D': debug++; break; + case 'f': opt_f++; break; + case 'F': fixed_speed = parse_advertise(optarg); + if (fixed_speed == -1) errflag++; + break; + case 'g': opt_g++; break; + case 'G': opt_G++; opt_G_string = strdup(optarg); break; + case 'm': opt_watch++; opt_status++; break; + case 'M': msg_level = strtoul(optarg, NULL, 0); break; + case 'h': fprintf(stderr, long_usage_msg, progname); return 0; + case 'p': override_phy = atoi(optarg); break; + case 'r': opt_restart++; break; + case 'R': opt_reset++; break; + case 's': opt_status++; break; + case 'v': verbose++; break; + case 'V': opt_version++; break; + case 'w': opt_watch++; break; + case '?': errflag++; break; + } + if (errflag) { + fprintf(stderr, usage_msg, progname); + return 2; + } + + if (verbose || opt_version) + printf(version); + + /* Open a basic socket. */ + if ((skfd = socket(AF_INET, SOCK_DGRAM,0)) < 0) { + perror("socket"); + return 1; + } + + if (debug) + fprintf(stderr, "DEBUG: argc=%d, optind=%d and argv[optind] is %s.\n", + argc, optind, argv[optind]); + + /* No remaining args means show all interfaces. */ + if (optind == argc) { + ifname = "eth0"; + fprintf(stderr, "Using the default interface 'eth0'.\n"); + } else { + /* Copy the interface name. */ + spp = argv + optind; + ifname = *spp++; + } + + if (ifname == NULL) { + ifname = "eth0"; + fprintf(stderr, "Using the default interface 'eth0'.\n"); + } + + /* Verify that the interface supports the ioctl(), and if + it is using the new or old SIOCGMIIPHY value (grrr...). + */ + { + u16 *data = (u16 *)(&ifr.ifr_data); + + strncpy(ifr.ifr_name, ifname, IFNAMSIZ); + data[0] = 0; + + if (ioctl(skfd, 0x8947, &ifr) >= 0) { + new_ioctl_nums = 1; + } else if (ioctl(skfd, SIOCDEVPRIVATE, &ifr) >= 0) { + new_ioctl_nums = 0; + } else { + fprintf(stderr, "SIOCGMIIPHY on %s failed: %s\n", ifname, + strerror(errno)); + (void) close(skfd); + return 1; + } + if (verbose) + printf(" Using the %s SIOCGMIIPHY value on PHY %d " + "(BMCR 0x%4.4x).\n", + new_ioctl_nums ? "new" : "old", data[0], data[3]); + } + + do_one_xcvr(skfd); + + (void) close(skfd); + return 0; +} + +int do_one_xcvr(int skfd) +{ + u16 *data = (u16 *)(&ifr.ifr_data); + u32 *data32 = (u32 *)(&ifr.ifr_data); + unsigned phy_id = data[0]; + + if (override_phy >= 0) { + printf("Using the specified MII PHY index %d.\n", override_phy); + phy_id = override_phy; + } + + if (opt_g || opt_G || msg_level >= 0) { + if (ioctl(skfd, SIOCGPARAMS, &ifr) < 0) { + fprintf(stderr, "SIOCGPARAMS on %s failed: %s\n", ifr.ifr_name, + strerror(errno)); + return -1; + } + } + if (opt_g) { + int i; + printf("Driver general parameter settings:"); + for (i = 0; i*sizeof(u32) < sizeof(ifr.ifr_ifru); i++) { + printf(" %d", data32[i]); + } + printf(".\n"); + } + if (opt_G) { + /* Set up to four arbitrary driver parameters from the -G parameter. + The format is comma separated integers, with a missing element + retaining the previous value. + */ + char *str = opt_G_string; + int i; + for (i = 0; str && i < 4; i++) { + char *endstr; + u32 newval = strtol(str, &endstr, 0); + if (debug) + printf(" parse string '%s' value %d end '%s'.\n", + str, newval, endstr); + if (str == endstr) { + if (endstr[0] == ',') /* No parameter */ + str = endstr+1; + else { + fprintf(stderr, "Invalid driver parameter '%s'.\n", str); + str = index(str, ','); + } + } else if (endstr[0] == ',') { + data32[i] = newval; + str = endstr + 1; + } else if (endstr[0] == 0) { + data32[i] = newval; + break; + } + } + printf("Setting new driver general parameters:"); + for (i = 0; i*sizeof(u32) < sizeof(ifr.ifr_ifru); i++) { + printf(" %d", data32[i]); + } + printf(".\n"); + if (ioctl(skfd, SIOCSPARAMS, &ifr) < 0) { + fprintf(stderr, "SIOCSPARAMS on %s failed: %s\n", ifr.ifr_name, + strerror(errno)); + return -1; + } + } + if (msg_level >= 0) { + data32[0] = msg_level; + if (ioctl(skfd, SIOCSPARAMS, &ifr) < 0) { + fprintf(stderr, "SIOCSPARAMS on %s failed: %s\n", ifr.ifr_name, + strerror(errno)); + return -1; + } + } + + if (opt_reset) { + printf("Resetting the transceiver...\n"); + mdio_write(skfd, phy_id, 0, 0x8000); + } + /* Note: PHY addresses > 32 are pseudo-MII devices, usually built-in. */ + if (phy_id < 64 && nway_advertise > 0) { + printf(" Setting the media capability advertisement register of " + "PHY #%d to 0x%4.4x.\n", phy_id, nway_advertise | 1); + mdio_write(skfd, phy_id, 4, nway_advertise | 1); + mdio_write(skfd, phy_id, 0, 0x1000); + } + + if (opt_restart) { + printf("Restarting negotiation...\n"); + mdio_write(skfd, phy_id, 0, 0x0000); + mdio_write(skfd, phy_id, 0, 0x1200); + } + /* To force 100baseTx-HD do mdio_write(skfd, phy_id, 0, 0x2000); */ + if (fixed_speed >= 0) { + int reg0_val = 0; + if (fixed_speed & 0x0180) /* 100mpbs */ + reg0_val |= 0x2000; + if ((fixed_speed & 0x0140) && /* A full duplex type and */ + ! (fixed_speed & 0x0820)) /* no half duplex types. */ + reg0_val |= 0x0100; + printf("Setting the speed to \"fixed\", Control register %4.4x.\n", + reg0_val); + mdio_write(skfd, phy_id, 0, reg0_val); + } + if (set_BMCR >= 0) { + printf("Setting the Basic Mode Control Register to 0x%4.4x.\n", + set_BMCR); + mdio_write(skfd, phy_id, 0, set_BMCR); + } + + if (opt_watch && opt_status) + monitor_status(skfd, phy_id); + + show_basic_mii(skfd, phy_id); +#ifdef LIBMII + if (verbose) + show_mii_details(skfd, phy_id); +#else + if (verbose || debug) { + int mii_reg, mii_val; + printf(" MII PHY #%d transceiver registers:", phy_id); + for (mii_reg = 0; mii_reg < 32; mii_reg++) { + mii_val = mdio_read(skfd, phy_id, mii_reg); + printf("%s %4.4x", (mii_reg % 8) == 0 ? "\n " : "", + mii_val); + } + printf("\n"); + } +#endif + + if (opt_watch) + monitor_mii(skfd, phy_id); + if (opt_status && + (mdio_read(skfd, phy_id, 1) & 0x0004) == 0) + exit(2); + return 0; +} + +int mdio_read(int skfd, int phy_id, int location) +{ + u16 *data = (u16 *)(&ifr.ifr_data); + + data[0] = phy_id; + data[1] = location; + + if (ioctl(skfd, new_ioctl_nums ? 0x8948 : SIOCDEVPRIVATE+1, &ifr) < 0) { + fprintf(stderr, "SIOCGMIIREG on %s failed: %s\n", ifr.ifr_name, + strerror(errno)); + return -1; + } + return data[3]; +} + +void mdio_write(int skfd, int phy_id, int location, int value) +{ + u16 *data = (u16 *)(&ifr.ifr_data); + + data[0] = phy_id; + data[1] = location; + data[2] = value; + + if (ioctl(skfd, new_ioctl_nums ? 0x8949 : SIOCDEVPRIVATE+2, &ifr) < 0) { + fprintf(stderr, "SIOCSMIIREG on %s failed: %s\n", ifr.ifr_name, + strerror(errno)); + } +} + +/* Parse the command line argument for advertised capabilities. */ +static int parse_advertise(const char *capabilities) +{ + const char *mtypes[] = { + "100baseT4", "100baseTx", "100baseTx-FD", "100baseTx-HD", + "10baseT", "10baseT-FD", "10baseT-HD", 0, + }; + char *endptr; + int cap_map[] = { 0x0200, 0x0180, 0x0100, 0x0080, 0x0060, 0x0040, 0x0020,}; + int i; + if ( ! capabilities) { + fprintf(stderr, "You passed -A 'NULL'. You must provide a media" + " list to advertise!\n"); + return -1; + } + if (debug) + fprintf(stderr, "Advertise string is '%s'.\n", capabilities); + for (i = 0; mtypes[i]; i++) + if (strcasecmp(mtypes[i], capabilities) == 0) + return cap_map[i]; + if ((i = strtol(capabilities, &endptr, 16)) <= 0xffff && endptr[0] == 0) + return i; + fprintf(stderr, "Invalid media advertisement value '%s'.\n" + " Either pass a numeric value or one of the following names:\n", + capabilities); + for (i = 0; mtypes[i]; i++) + fprintf(stderr, " %-14s %3.3x\n", mtypes[i], cap_map[i]); + return -1; +} + +/* Trivial versions if we don't link against libmii.c */ +static const char *media_names[] = { + "10baseT", "10baseT-FD", "100baseTx", "100baseTx-FD", "100baseT4", + "Flow-control", 0, +}; +/* Various non-good bits in the command register. */ +static const char *bmcr_bits[] = { + " Internal Collision-Test enabled!\n", "", /* 0x0080,0x0100 */ + " Restarted auto-negotiation in progress!\n", + " Transceiver isolated from the MII!\n", + " Transceiver powered down!\n", "", "", + " Transceiver in loopback mode!\n", + " Transceiver currently being reset!\n", +}; + +int show_basic_mii(long ioaddr, int phy_id) +{ + int mii_reg, i; + u16 mii_val[32]; + u16 bmcr, bmsr, new_bmsr, nway_advert, lkpar; + + for (mii_reg = 0; mii_reg < 8; mii_reg++) + mii_val[mii_reg] = mdio_read(ioaddr, phy_id, mii_reg); + if ( ! verbose) { + printf("Basic registers of MII PHY #%d: ", phy_id); + for (mii_reg = 0; mii_reg < 8; mii_reg++) + printf(" %4.4x", mii_val[mii_reg]); + printf(".\n"); + } + + if (mii_val[0] == 0xffff || mii_val[1] == 0x0000) { + printf(" No MII transceiver present!.\n"); + if (! opt_f) { + printf(" Use '--force' to view the information anyway.\n"); + return -1; + } + } + /* Descriptive rename. */ + bmcr = mii_val[0]; + bmsr = mii_val[1]; + nway_advert = mii_val[4]; + lkpar = mii_val[5]; + + if (lkpar & 0x4000) { + int negotiated = nway_advert & lkpar & 0x3e0; + int max_capability = 0; + /* Scan for the highest negotiated capability, highest priority + (100baseTx-FDX) to lowest (10baseT-HDX). */ + int media_priority[] = {8, 9, 7, 6, 5}; /* media_names[i-5] */ + printf(" The autonegotiated capability is %4.4x.\n", negotiated); + for (i = 0; media_priority[i]; i++) + if (negotiated & (1 << media_priority[i])) { + max_capability = media_priority[i]; + break; + } + if (max_capability) + printf("The autonegotiated media type is %s.\n", + media_names[max_capability - 5]); + else + printf("No common media type was autonegotiated!\n" + "This is extremely unusual and typically indicates a " + "configuration error.\n" "Perhaps the advertised " + "capability set was intentionally limited.\n"); + } + printf(" Basic mode control register 0x%4.4x:", bmcr); + if (bmcr & 0x1000) + printf(" Auto-negotiation enabled.\n"); + else + printf(" Auto-negotiation disabled, with\n" + " Speed fixed at 10%s mbps, %s-duplex.\n", + bmcr & 0x2000 ? "0" : "", + bmcr & 0x0100 ? "full":"half"); + for (i = 0; i < 9; i++) + if (bmcr & (0x0080<<i)) + printf(bmcr_bits[i]); + + new_bmsr = mdio_read(ioaddr, phy_id, 1); + if ((bmsr & 0x0016) == 0x0004) + printf( " You have link beat, and everything is working OK.\n"); + else + printf(" Basic mode status register 0x%4.4x ... %4.4x.\n" + " Link status: %sestablished.\n", + bmsr, new_bmsr, + bmsr & 0x0004 ? "" : + (new_bmsr & 0x0004) ? "previously broken, but now re" : "not "); + if (verbose) { + printf(" This transceiver is capable of "); + if (bmsr & 0xF800) { + for (i = 15; i >= 11; i--) + if (bmsr & (1<<i)) + printf(" %s", media_names[i-11]); + } else + printf("<Warning! No media capabilities>"); + printf(".\n"); + printf(" %s to perform Auto-negotiation, negotiation %scomplete.\n", + bmsr & 0x0008 ? "Able" : "Unable", + bmsr & 0x0020 ? "" : "not "); + } + + if (bmsr & 0x0010) + printf(" Remote fault detected!\n"); + if (bmsr & 0x0002) + printf(" *** Link Jabber! ***\n"); + + if (lkpar & 0x4000) { + printf(" Your link partner advertised %4.4x:", + lkpar); + for (i = 5; i >= 0; i--) + if (lkpar & (0x20<<i)) + printf(" %s", media_names[i]); + printf("%s.\n", lkpar & 0x0400 ? ", w/ 802.3X flow control" : ""); + } else if (lkpar & 0x00A0) + printf(" Your link partner is generating %s link beat (no" + " autonegotiation).\n", + lkpar & 0x0080 ? "100baseTx" : "10baseT"); + else if ( ! (bmcr & 0x1000)) + printf(" Link partner information is not exchanged when in" + " fixed speed mode.\n"); + else if ( ! (new_bmsr & 0x004)) + ; /* If no partner, do not report status. */ + else if (lkpar == 0x0001 || lkpar == 0x0000) { + printf(" Your link partner does not do autonegotiation, and this " + "transceiver type\n does not report the sensed link " + "speed.\n"); + } else + printf(" Your link partner is strange, status %4.4x.\n", lkpar); + + printf(" End of basic transceiver information.\n\n"); + return 0; +} + +static void monitor_status(long ioaddr, int phy_id) +{ + unsigned int baseline_1 = 0x55555555; /* Always show initial status. */ + + while (1) { + unsigned int new_1 = mdio_read(ioaddr, phy_id, 1); + if (new_1 != baseline_1) { + printf("%-12s 0x%4.4x 0x%4.4x\n", + new_1 & 0x04 ? (new_1==0xffff ? "unknown" : "up") : + new_1 & 0x20 ? "negotiating" : "down", + new_1, mdio_read(ioaddr, phy_id, 5)); + fflush(stdout); + baseline_1 = new_1; + } + sleep(1); + } +} + +int show_mii_details(long ioaddr, int phy_id) +{ + int mii_reg, mii_val; + printf(" MII PHY #%d transceiver registers:", phy_id); + for (mii_reg = 0; mii_reg < 32; mii_reg++) { + mii_val = mdio_read(skfd, phy_id, mii_reg); + printf("%s %4.4x", (mii_reg % 8) == 0 ? "\n " : "", + mii_val); + } + printf("\nThis version of 'mii-diag' has not been linked with " + "the libmii.c library.\n" + " That library provides extended transceiver status reports.\n"); + return 0; +} + +void monitor_mii(long ioaddr, int phy_id) +{ + fprintf(stderr, "\nThis version of 'mii-diag' has not been linked with " + "the libmii.c library \n" + " required for the media monitor option.\n"); +} + + + +/* + * Local variables: + * version-control: t + * kept-new-versions: 5 + * c-indent-level: 4 + * c-basic-offset: 4 + * tab-width: 4 + * compile-command: "gcc -Wall -Wstrict-prototypes -O mii-diag.c -DLIBMII libmii.c -o mii-diag" + * simple-compile-command: "gcc mii-diag.c -o mii-diag" + * End: + */ |