sys/dev/netif/ep/if_ep.c

   1 /*
   2  * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Herb Peyerl.
  16  * 4. The name of Herb Peyerl may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  *      if_ep.c,v 1.19 1995/01/24 20:53:45 davidg Exp
  31  */
  32
  33 /*
  34  *      Modified from the FreeBSD 1.1.5.1 version by:
  35  *                      Andres Vega Garcia
  36  *                      INRIA - Sophia Antipolis, France
  37  *                      avega@sophia.inria.fr
  38  */
  39
  40 /*
  41  * $FreeBSD: src/sys/dev/ep/if_ep.c,v 1.95.2.3 2002/03/06 07:26:35 imp Exp $
  42  * $DragonFly: src/sys/dev/netif/ep/if_ep.c,v 1.25 2006/10/25 20:55:56 dillon Exp $
  43  *
  44  *  Promiscuous mode added and interrupt logic slightly changed
  45  *  to reduce the number of adapter failures. Transceiver select
  46  *  logic changed to use value from EEPROM. Autoconfiguration
  47  *  features added.
  48  *  Done by:
  49  *          Serge Babkin
  50  *          Chelindbank (Chelyabinsk, Russia)
  51  *          babkin@hq.icb.chel.su
  52  */
  53
  54 /*
  55  * Pccard support for 3C589 by:
  56  *              HAMADA Naoki
  57  *              nao@tom-yam.or.jp
  58  */
  59
  60 /*
  61  * MAINTAINER: Matthew N. Dodd <winter@jurai.net>
  62  *                             <mdodd@FreeBSD.org>
  63  */
  64
  65 #include <sys/param.h>
  66 #include <sys/kernel.h>
  67 #include <sys/systm.h>
  68 #include <sys/malloc.h>
  69 #include <sys/mbuf.h>
  70 #include <sys/socket.h>
  71 #include <sys/sockio.h>
  72 #include <sys/module.h>
  73 #include <sys/bus.h>
  74 #include <sys/rman.h>
  75 #include <sys/thread2.h>
  76
  77 #include <net/if.h>
  78 #include <net/ifq_var.h>
  79 #include <net/if_arp.h>
  80 #include <net/if_media.h>
  81 #include <net/ethernet.h>
  82 #include <net/bpf.h>
  83
  84 #include <netinet/in.h>
  85 #include <netinet/if_ether.h>
  86
  87 #include <machine/clock.h>
  88
  89 #include "if_epreg.h"
  90 #include "if_epvar.h"
  91 #include "../elink_layer/elink.h"
  92
  93 /* Exported variables */
  94 devclass_t ep_devclass;
  95
  96 #if 0
  97 static char *   ep_conn_type[] = {"UTP", "AUI", "???", "BNC"};
  98 static int      if_media2ep_media[] = { 0, 0, 0, UTP, BNC, AUI };
  99 #endif
 100
 101 static int      ep_media2if_media[] =
 102         { IFM_10_T, IFM_10_5, IFM_NONE, IFM_10_2, IFM_NONE };
 103
 104 /* if functions */
 105 static void     ep_if_init      (void *);
 106 static int      ep_if_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
 107 static void     ep_if_start     (struct ifnet *);
 108 static void     ep_if_watchdog  (struct ifnet *);
 109
 110 /* if_media functions */
 111 static int      ep_ifmedia_upd  (struct ifnet *);
 112 static void     ep_ifmedia_sts  (struct ifnet *, struct ifmediareq *);
 113
 114 static void     epstop          (struct ep_softc *);
 115 static void     epread          (struct ep_softc *);
 116 static int      eeprom_rdy      (struct ep_softc *);
 117
 118 DECLARE_DUMMY_MODULE(if_ep);
 119
 120 #define EP_FTST(sc, f)  (sc->stat &   (f))
 121 #define EP_FSET(sc, f)  (sc->stat |=  (f))
 122 #define EP_FRST(sc, f)  (sc->stat &= ~(f))
 123
 124 static int
 125 eeprom_rdy(struct ep_softc *sc)
 126 {
 127     int i;
 128
 129     for (i = 0; is_eeprom_busy(BASE) && i < MAX_EEPROMBUSY; i++) {
 130         DELAY(100);
 131     }
 132     if (i >= MAX_EEPROMBUSY) {
 133         if_printf(&sc->arpcom.ac_if, "eeprom failed to come ready.\n");
 134         return (0);
 135     }
 136     return (1);
 137 }
 138
 139 /*
 140  * get_e: gets a 16 bits word from the EEPROM. we must have set the window
 141  * before
 142  */
 143 u_int16_t
 144 get_e(struct ep_softc *sc, int offset)
 145 {
 146     if (!eeprom_rdy(sc))
 147         return (0);
 148     outw(BASE + EP_W0_EEPROM_COMMAND, (EEPROM_CMD_RD << sc->epb.cmd_off) | offset);
 149     if (!eeprom_rdy(sc))
 150         return (0);
 151     return (inw(BASE + EP_W0_EEPROM_DATA));
 152 }
 153
 154 void
 155 ep_get_macaddr(struct ep_softc *sc, uint8_t *addr)
 156 {
 157         int                     i;
 158         u_int16_t *             macaddr = (u_int16_t *)addr;
 159
 160         GO_WINDOW(0);
 161         for(i = EEPROM_NODE_ADDR_0; i <= EEPROM_NODE_ADDR_2; i++) {
 162                 macaddr[i] = htons(get_e(sc, i));
 163         }
 164
 165         return;
 166 }
 167
 168 int
 169 ep_alloc(device_t dev)
 170 {
 171         struct ep_softc *       sc = device_get_softc(dev);
 172         int                     rid;
 173         int                     error = 0;
 174
 175         rid = 0;
 176         sc->iobase = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
 177             RF_ACTIVE);
 178         if (!sc->iobase) {
 179                 device_printf(dev, "No I/O space?!\n");
 180                 error = ENXIO;
 181                 goto bad;
 182         }
 183
 184         rid = 0;
 185         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
 186         if (!sc->irq) {
 187                 device_printf(dev, "No irq?!\n");
 188                 error = ENXIO;
 189                 goto bad;
 190         }
 191
 192         if_initname(&sc->arpcom.ac_if,
 193                     device_get_name(dev), device_get_unit(dev));
 194         sc->stat = 0;   /* 16 bit access */
 195
 196         sc->ep_io_addr = rman_get_start(sc->iobase);
 197
 198         sc->ep_btag = rman_get_bustag(sc->iobase);
 199         sc->ep_bhandle = rman_get_bushandle(sc->iobase);
 200
 201         sc->ep_connectors = 0;
 202         sc->ep_connector = 0;
 203
 204         GO_WINDOW(0);
 205         sc->epb.cmd_off = 0;
 206         sc->epb.prod_id = get_e(sc, EEPROM_PROD_ID);
 207         sc->epb.res_cfg = get_e(sc, EEPROM_RESOURCE_CFG);
 208
 209 bad:
 210         return (error);
 211 }
 212
 213 void
 214 ep_get_media(struct ep_softc *sc)
 215 {
 216         u_int16_t               config;
 217
 218         GO_WINDOW(0);
 219         config = inw(BASE + EP_W0_CONFIG_CTRL);
 220         if (config & IS_AUI)
 221                 sc->ep_connectors |= AUI;
 222         if (config & IS_BNC)
 223                 sc->ep_connectors |= BNC;
 224         if (config & IS_UTP)
 225                 sc->ep_connectors |= UTP;
 226
 227         if (!(sc->ep_connectors & 7)) {
 228                 if (bootverbose)
 229                         if_printf(&sc->arpcom.ac_if, "no connectors!\n");
 230         }
 231
 232         /*
 233          * This works for most of the cards so we'll do it here.
 234          * The cards that require something different can override
 235          * this later on.
 236          */
 237         sc->ep_connector = inw(BASE + EP_W0_ADDRESS_CFG) >> ACF_CONNECTOR_BITS;
 238
 239         return;
 240 }
 241
 242 void
 243 ep_free(device_t dev)
 244 {
 245         struct ep_softc *       sc = device_get_softc(dev);
 246
 247         if (sc->iobase)
 248                 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->iobase);
 249         if (sc->irq)
 250                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq);
 251
 252         return;
 253 }
 254
 255 int
 256 ep_attach(struct ep_softc *sc)
 257 {
 258         struct ifnet *          ifp = NULL;
 259         struct ifmedia *        ifm = NULL;
 260         u_short *               p;
 261         uint8_t                 ether_addr[ETHER_ADDR_LEN];
 262         int                     i;
 263
 264         sc->gone = 0;
 265
 266         ep_get_macaddr(sc, ether_addr);
 267
 268         /*
 269          * Setup the station address
 270          */
 271         p = (u_short*)ether_addr;
 272         GO_WINDOW(2);
 273         for (i = 0; i < 3; i++) {
 274                 outw(BASE + EP_W2_ADDR_0 + (i * 2), ntohs(p[i]));
 275         }
 276
 277         ifp = &sc->arpcom.ac_if;
 278
 279         ifp->if_softc = sc;
 280         ifp->if_mtu = ETHERMTU;
 281         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
 282         ifp->if_start = ep_if_start;
 283         ifp->if_ioctl = ep_if_ioctl;
 284         ifp->if_watchdog = ep_if_watchdog;
 285         ifp->if_init = ep_if_init;
 286         ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 287         ifq_set_ready(&ifp->if_snd);
 288
 289         if (!sc->epb.mii_trans) {
 290                 ifmedia_init(&sc->ifmedia, 0, ep_ifmedia_upd, ep_ifmedia_sts);
 291
 292                 if (sc->ep_connectors & AUI)
 293                         ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_5, 0, NULL);
 294                 if (sc->ep_connectors & UTP)
 295                         ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL);
 296                 if (sc->ep_connectors & BNC)
 297                         ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_2, 0, NULL);
 298                 if (!sc->ep_connectors)
 299                         ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL);
 300
 301                 ifmedia_set(&sc->ifmedia, IFM_ETHER|ep_media2if_media[sc->ep_connector]);
 302
 303                 ifm = &sc->ifmedia;
 304                 ifm->ifm_media = ifm->ifm_cur->ifm_media;
 305                 ep_ifmedia_upd(ifp);
 306         }
 307
 308         ether_ifattach(ifp, ether_addr, NULL);
 309
 310 #ifdef EP_LOCAL_STATS
 311         sc->rx_no_first = sc->rx_no_mbuf = sc->rx_bpf_disc =
 312                 sc->rx_overrunf = sc->rx_overrunl = sc->tx_underrun = 0;
 313 #endif
 314         EP_FSET(sc, F_RX_FIRST);
 315         sc->top = sc->mcur = 0;
 316
 317         return 0;
 318 }
 319
 320 /*
 321  * The order in here seems important. Otherwise we may not receive
 322  * interrupts. ?!
 323  */
 324 static void
 325 ep_if_init(void *xsc)
 326 {
 327     struct ep_softc *sc = xsc;
 328     struct ifnet *ifp = &sc->arpcom.ac_if;
 329     int i;
 330
 331     if (sc->gone)
 332         return;
 333
 334     crit_enter();
 335
 336     while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
 337
 338     GO_WINDOW(0);
 339     outw(BASE + EP_COMMAND, STOP_TRANSCEIVER);
 340     GO_WINDOW(4);
 341     outw(BASE + EP_W4_MEDIA_TYPE, DISABLE_UTP);
 342     GO_WINDOW(0);
 343
 344     /* Disable the card */
 345     outw(BASE + EP_W0_CONFIG_CTRL, 0);
 346
 347     /* Enable the card */
 348     outw(BASE + EP_W0_CONFIG_CTRL, ENABLE_DRQ_IRQ);
 349
 350     GO_WINDOW(2);
 351
 352     /* Reload the ether_addr. */
 353     for (i = 0; i < 6; i++)
 354         outb(BASE + EP_W2_ADDR_0 + i, sc->arpcom.ac_enaddr[i]);
 355
 356     outw(BASE + EP_COMMAND, RX_RESET);
 357     outw(BASE + EP_COMMAND, TX_RESET);
 358     while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
 359
 360     /* Window 1 is operating window */
 361     GO_WINDOW(1);
 362     for (i = 0; i < 31; i++)
 363         inb(BASE + EP_W1_TX_STATUS);
 364
 365     /* get rid of stray intr's */
 366     outw(BASE + EP_COMMAND, ACK_INTR | 0xff);
 367
 368     outw(BASE + EP_COMMAND, SET_RD_0_MASK | S_5_INTS);
 369
 370     outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS);
 371
 372     if (ifp->if_flags & IFF_PROMISC)
 373         outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |
 374          FIL_GROUP | FIL_BRDCST | FIL_ALL);
 375     else
 376         outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |
 377          FIL_GROUP | FIL_BRDCST);
 378
 379     if (!sc->epb.mii_trans) {
 380         ep_ifmedia_upd(ifp);
 381     }
 382
 383     outw(BASE + EP_COMMAND, RX_ENABLE);
 384     outw(BASE + EP_COMMAND, TX_ENABLE);
 385
 386     ifp->if_flags |= IFF_RUNNING;
 387     ifp->if_flags &= ~IFF_OACTIVE;      /* just in case */
 388
 389 #ifdef EP_LOCAL_STATS
 390     sc->rx_no_first = sc->rx_no_mbuf =
 391         sc->rx_overrunf = sc->rx_overrunl = sc->tx_underrun = 0;
 392 #endif
 393     EP_FSET(sc, F_RX_FIRST);
 394     if (sc->top) {
 395         m_freem(sc->top);
 396         sc->top = sc->mcur = 0;
 397     }
 398     outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH);
 399     outw(BASE + EP_COMMAND, SET_TX_START_THRESH | 16);
 400
 401     /*
 402      * Store up a bunch of mbuf's for use later. (MAX_MBS). First we free up
 403      * any that we had in case we're being called from intr or somewhere
 404      * else.
 405      */
 406
 407     GO_WINDOW(1);
 408     ep_if_start(ifp);
 409
 410     crit_exit();
 411 }
 412
 413 static const char padmap[] = {0, 3, 2, 1};
 414
 415 static void
 416 ep_if_start(struct ifnet *ifp)
 417 {
 418     struct ep_softc *sc = ifp->if_softc;
 419     u_int len;
 420     struct mbuf *m;
 421     struct mbuf *top;
 422     int pad;
 423
 424     if (sc->gone) {
 425         return;
 426     }
 427
 428     while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
 429     if (ifp->if_flags & IFF_OACTIVE) {
 430         return;
 431     }
 432
 433     crit_enter();
 434
 435 startagain:
 436     /* Sneak a peek at the next packet */
 437     m = ifq_poll(&ifp->if_snd);
 438     if (m == NULL) {
 439         crit_exit();
 440         return;
 441     }
 442
 443     for (len = 0, top = m; m; m = m->m_next)
 444         len += m->m_len;
 445     m = top;
 446
 447     pad = padmap[len & 3];
 448
 449     /*
 450      * The 3c509 automatically pads short packets to minimum ethernet length,
 451      * but we drop packets that are too large. Perhaps we should truncate
 452      * them instead?
 453      */
 454     if (len + pad > ETHER_MAX_LEN) {
 455         /* packet is obviously too large: toss it */
 456         ++ifp->if_oerrors;
 457         ifq_dequeue(&ifp->if_snd, m);
 458         m_freem(m);
 459         goto readcheck;
 460     }
 461     if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) {
 462         /* no room in FIFO */
 463         outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4));
 464         /* make sure */
 465         if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) {
 466             ifp->if_flags |= IFF_OACTIVE;
 467             crit_exit();
 468             return;
 469         }
 470     } else {
 471         outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | EP_THRESH_DISABLE);
 472     }
 473
 474     ifq_dequeue(&ifp->if_snd, m);
 475
 476     outw(BASE + EP_W1_TX_PIO_WR_1, len);
 477     outw(BASE + EP_W1_TX_PIO_WR_1, 0x0);        /* Second dword meaningless */
 478
 479     if (EP_FTST(sc, F_ACCESS_32_BITS)) {
 480         for (top = m; m != 0; m = m->m_next) {
 481             outsl(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t),
 482                   m->m_len / 4);
 483             if (m->m_len & 3)
 484                 outsb(BASE + EP_W1_TX_PIO_WR_1,
 485                       mtod(m, caddr_t) + (m->m_len & (~3)),
 486                       m->m_len & 3);
 487         }
 488     } else {
 489         for (top = m; m != 0; m = m->m_next) {
 490             outsw(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 2);
 491             if (m->m_len & 1)
 492                 outb(BASE + EP_W1_TX_PIO_WR_1,
 493                      *(mtod(m, caddr_t) + m->m_len - 1));
 494         }
 495     }
 496
 497     while (pad--)
 498         outb(BASE + EP_W1_TX_PIO_WR_1, 0);      /* Padding */
 499
 500     BPF_MTAP(ifp, top);
 501
 502     ifp->if_timer = 2;
 503     ifp->if_opackets++;
 504     m_freem(top);
 505
 506     /*
 507      * Is another packet coming in? We don't want to overflow the tiny RX
 508      * fifo.
 509      */
 510 readcheck:
 511     if (inw(BASE + EP_W1_RX_STATUS) & RX_BYTES_MASK) {
 512         /*
 513          * we check if we have packets left, in that case we prepare to come
 514          * back later
 515          */
 516         if (!ifq_is_empty(&ifp->if_snd))
 517             outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | 8);
 518
 519         crit_exit();
 520         return;
 521     }
 522     goto startagain;
 523 }
 524
 525 void
 526 ep_intr(void *arg)
 527 {
 528     struct ep_softc *sc = arg;
 529     struct ifnet *ifp = &sc->arpcom.ac_if;
 530     int status;
 531
 532      /*
 533       * quick fix: Try to detect an interrupt when the card goes away.
 534       */
 535     if (sc->gone || inw(BASE + EP_STATUS) == 0xffff) {
 536             return;
 537     }
 538
 539     outw(BASE + EP_COMMAND, SET_INTR_MASK); /* disable all Ints */
 540
 541 rescan:
 542
 543     while ((status = inw(BASE + EP_STATUS)) & S_5_INTS) {
 544
 545         /* first acknowledge all interrupt sources */
 546         outw(BASE + EP_COMMAND, ACK_INTR | (status & S_MASK));
 547
 548         if (status & (S_RX_COMPLETE | S_RX_EARLY))
 549             epread(sc);
 550         if (status & S_TX_AVAIL) {
 551             /* we need ACK */
 552             ifp->if_timer = 0;
 553             ifp->if_flags &= ~IFF_OACTIVE;
 554             GO_WINDOW(1);
 555             inw(BASE + EP_W1_FREE_TX);
 556             ep_if_start(ifp);
 557         }
 558         if (status & S_CARD_FAILURE) {
 559             ifp->if_timer = 0;
 560 #ifdef EP_LOCAL_STATS
 561             printf("\n");
 562             if_printf(ifp, "\n\tStatus: %x\n", status);
 563             GO_WINDOW(4);
 564             printf("\tFIFO Diagnostic: %x\n", inw(BASE + EP_W4_FIFO_DIAG));
 565             printf("\tStat: %x\n", sc->stat);
 566             printf("\tIpackets=%d, Opackets=%d\n",
 567                 ifp->if_ipackets, ifp->if_opackets);
 568             printf("\tNOF=%d, NOMB=%d, RXOF=%d, RXOL=%d, TXU=%d\n",
 569                    sc->rx_no_first, sc->rx_no_mbuf, sc->rx_overrunf,
 570                    sc->rx_overrunl, sc->tx_underrun);
 571 #else
 572
 573 #ifdef DIAGNOSTIC
 574             if_printf(ifp, "Status: %x (input buffer overflow)\n", status);
 575 #else
 576             ++ifp->if_ierrors;
 577 #endif
 578
 579 #endif
 580             ep_if_init(sc);
 581             return;
 582         }
 583         if (status & S_TX_COMPLETE) {
 584             ifp->if_timer = 0;
 585             /* we  need ACK. we do it at the end */
 586             /*
 587              * We need to read TX_STATUS until we get a 0 status in order to
 588              * turn off the interrupt flag.
 589              */
 590             while ((status = inb(BASE + EP_W1_TX_STATUS)) & TXS_COMPLETE) {
 591                 if (status & TXS_SUCCES_INTR_REQ);
 592                 else if (status & (TXS_UNDERRUN | TXS_JABBER | TXS_MAX_COLLISION)) {
 593                     outw(BASE + EP_COMMAND, TX_RESET);
 594                     if (status & TXS_UNDERRUN) {
 595 #ifdef EP_LOCAL_STATS
 596                         sc->tx_underrun++;
 597 #endif
 598                     } else {
 599                         if (status & TXS_JABBER);
 600                         else    /* TXS_MAX_COLLISION - we shouldn't get here */
 601                             ++ifp->if_collisions;
 602                     }
 603                     ++ifp->if_oerrors;
 604                     outw(BASE + EP_COMMAND, TX_ENABLE);
 605                     /*
 606                      * To have a tx_avail_int but giving the chance to the
 607                      * Reception
 608                      */
 609                     if (!ifq_is_empty(&ifp->if_snd))
 610                         outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | 8);
 611                 }
 612                 outb(BASE + EP_W1_TX_STATUS, 0x0);      /* pops up the next
 613                                                          * status */
 614             }                   /* while */
 615             ifp->if_flags &= ~IFF_OACTIVE;
 616             GO_WINDOW(1);
 617             inw(BASE + EP_W1_FREE_TX);
 618             ep_if_start(ifp);
 619         }                       /* end TX_COMPLETE */
 620     }
 621
 622     outw(BASE + EP_COMMAND, C_INTR_LATCH);      /* ACK int Latch */
 623
 624     if ((status = inw(BASE + EP_STATUS)) & S_5_INTS)
 625         goto rescan;
 626
 627     /* re-enable Ints */
 628     outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS);
 629 }
 630
 631 static void
 632 epread(struct ep_softc *sc)
 633 {
 634     struct mbuf *top, *mcur, *m;
 635     struct ifnet *ifp;
 636     int lenthisone;
 637
 638     short rx_fifo2, status;
 639     short rx_fifo;
 640
 641     ifp = &sc->arpcom.ac_if;
 642     status = inw(BASE + EP_W1_RX_STATUS);
 643
 644 read_again:
 645
 646     if (status & ERR_RX) {
 647         ++ifp->if_ierrors;
 648         if (status & ERR_RX_OVERRUN) {
 649             /*
 650              * we can think the rx latency is actually greather than we
 651              * expect
 652              */
 653 #ifdef EP_LOCAL_STATS
 654             if (EP_FTST(sc, F_RX_FIRST))
 655                 sc->rx_overrunf++;
 656             else
 657                 sc->rx_overrunl++;
 658 #endif
 659         }
 660         goto out;
 661     }
 662     rx_fifo = rx_fifo2 = status & RX_BYTES_MASK;
 663
 664     if (EP_FTST(sc, F_RX_FIRST)) {
 665         m = m_getl(rx_fifo, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL);
 666         if (!m)
 667             goto out;
 668         sc->top = sc->mcur = top = m;
 669 #define EROUND  ((sizeof(struct ether_header) + 3) & ~3)
 670 #define EOFF    (EROUND - sizeof(struct ether_header))
 671         top->m_data += EOFF;
 672
 673         /* Read what should be the header. */
 674         insw(BASE + EP_W1_RX_PIO_RD_1,
 675              mtod(top, caddr_t), sizeof(struct ether_header) / 2);
 676         top->m_len = sizeof(struct ether_header);
 677         rx_fifo -= sizeof(struct ether_header);
 678         sc->cur_len = rx_fifo2;
 679     } else {
 680         /* come here if we didn't have a complete packet last time */
 681         top = sc->top;
 682         m = sc->mcur;
 683         sc->cur_len += rx_fifo2;
 684     }
 685
 686     /* Reads what is left in the RX FIFO */
 687     while (rx_fifo > 0) {
 688         lenthisone = min(rx_fifo, M_TRAILINGSPACE(m));
 689         if (lenthisone == 0) {  /* no room in this one */
 690             mcur = m;
 691             m = m_getl(rx_fifo, MB_DONTWAIT, MT_DATA, 0, NULL);
 692             if (!m)
 693                 goto out;
 694             m->m_len = 0;
 695             mcur->m_next = m;
 696             lenthisone = min(rx_fifo, M_TRAILINGSPACE(m));
 697         }
 698         if (EP_FTST(sc, F_ACCESS_32_BITS)) { /* default for EISA configured cards*/
 699             insl(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len,
 700                  lenthisone / 4);
 701             m->m_len += (lenthisone & ~3);
 702             if (lenthisone & 3)
 703                 insb(BASE + EP_W1_RX_PIO_RD_1,
 704                      mtod(m, caddr_t) + m->m_len,
 705                      lenthisone & 3);
 706             m->m_len += (lenthisone & 3);
 707         } else {
 708             insw(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len,
 709                  lenthisone / 2);
 710             m->m_len += lenthisone;
 711             if (lenthisone & 1)
 712                 *(mtod(m, caddr_t) + m->m_len - 1) = inb(BASE + EP_W1_RX_PIO_RD_1);
 713         }
 714         rx_fifo -= lenthisone;
 715     }
 716
 717     if (status & ERR_RX_INCOMPLETE) {   /* we haven't received the complete
 718                                          * packet */
 719         sc->mcur = m;
 720 #ifdef EP_LOCAL_STATS
 721         sc->rx_no_first++;      /* to know how often we come here */
 722 #endif
 723         EP_FRST(sc, F_RX_FIRST);
 724         if (!((status = inw(BASE + EP_W1_RX_STATUS)) & ERR_RX_INCOMPLETE)) {
 725             /* we see if by now, the packet has completly arrived */
 726             goto read_again;
 727         }
 728         outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | RX_NEXT_EARLY_THRESH);
 729         return;
 730     }
 731     outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
 732     ++ifp->if_ipackets;
 733     EP_FSET(sc, F_RX_FIRST);
 734     top->m_pkthdr.rcvif = &sc->arpcom.ac_if;
 735     top->m_pkthdr.len = sc->cur_len;
 736
 737     ifp->if_input(ifp, top);
 738     sc->top = 0;
 739     while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
 740     outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH);
 741     return;
 742
 743 out:
 744     outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
 745     if (sc->top) {
 746         m_freem(sc->top);
 747         sc->top = 0;
 748 #ifdef EP_LOCAL_STATS
 749         sc->rx_no_mbuf++;
 750 #endif
 751     }
 752     EP_FSET(sc, F_RX_FIRST);
 753     while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
 754     outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH);
 755 }
 756
 757 static int
 758 ep_ifmedia_upd(struct ifnet *ifp)
 759 {
 760         struct ep_softc *       sc = ifp->if_softc;
 761         int                     i = 0, j;
 762
 763         GO_WINDOW(0);
 764         outw(BASE + EP_COMMAND, STOP_TRANSCEIVER);
 765         GO_WINDOW(4);
 766         outw(BASE + EP_W4_MEDIA_TYPE, DISABLE_UTP);
 767         GO_WINDOW(0);
 768
 769         switch (IFM_SUBTYPE(sc->ifmedia.ifm_media)) {
 770                 case IFM_10_T:
 771                         if (sc->ep_connectors & UTP) {
 772                                 i = ACF_CONNECTOR_UTP;
 773                                 GO_WINDOW(4);
 774                                 outw(BASE + EP_W4_MEDIA_TYPE, ENABLE_UTP);
 775                         }
 776                         break;
 777                 case IFM_10_2:
 778                         if (sc->ep_connectors & BNC) {
 779                                 i = ACF_CONNECTOR_BNC;
 780                                 outw(BASE + EP_COMMAND, START_TRANSCEIVER);
 781                                 DELAY(DELAY_MULTIPLE * 1000);
 782                         }
 783                         break;
 784                 case IFM_10_5:
 785                         if (sc->ep_connectors & AUI)
 786                                 i = ACF_CONNECTOR_AUI;
 787                         break;
 788                 default:
 789                         i = sc->ep_connector;
 790                         if_printf(ifp, "strange connector type in EEPROM: "
 791                                   "assuming AUI\n");
 792                         break;
 793         }
 794
 795         GO_WINDOW(0);
 796         j = inw(BASE + EP_W0_ADDRESS_CFG) & 0x3fff;
 797         outw(BASE + EP_W0_ADDRESS_CFG, j | (i << ACF_CONNECTOR_BITS));
 798
 799         return (0);
 800 }
 801
 802 static void
 803 ep_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
 804 {
 805         struct ep_softc *       sc = ifp->if_softc;
 806
 807         ifmr->ifm_active = sc->ifmedia.ifm_media;
 808
 809         return;
 810 }
 811
 812 static int
 813 ep_if_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
 814 {
 815         struct ep_softc *       sc = ifp->if_softc;
 816         struct ifreq *          ifr = (struct ifreq *)data;
 817         int error = 0;
 818
 819         crit_enter();
 820
 821         switch (cmd) {
 822         case SIOCSIFFLAGS:
 823                 if (((ifp->if_flags & IFF_UP) == 0) &&
 824                     (ifp->if_flags & IFF_RUNNING)) {
 825                         ifp->if_flags &= ~IFF_RUNNING;
 826                         epstop(sc);
 827                 } else {
 828                         /* reinitialize card on any parameter change */
 829                         ep_if_init(sc);
 830                 }
 831                 break;
 832 #ifdef notdef
 833         case SIOCGHWADDR:
 834                 bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data,
 835                       sizeof(sc->sc_addr));
 836                 break;
 837 #endif
 838         case SIOCADDMULTI:
 839         case SIOCDELMULTI:
 840                 /*
 841                  * The Etherlink III has no programmable multicast
 842                  * filter.  We always initialize the card to be
 843                  * promiscuous to multicast, since we're always a
 844                  * member of the ALL-SYSTEMS group, so there's no
 845                  * need to process SIOC*MULTI requests.
 846                  */
 847                 error = 0;
 848                 break;
 849         case SIOCSIFMEDIA:
 850         case SIOCGIFMEDIA:
 851                 if (!sc->epb.mii_trans) {
 852                         error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, cmd);
 853                 } else {
 854                         error = EINVAL;
 855                 }
 856                 break;
 857         default:
 858                 error = ether_ioctl(ifp, cmd, data);
 859                 break;
 860         }
 861
 862         crit_exit();
 863
 864         return (error);
 865 }
 866
 867 static void
 868 ep_if_watchdog(struct ifnet *ifp)
 869 {
 870     struct ep_softc *sc = ifp->if_softc;
 871
 872     /*
 873     if_printf(ifp, "watchdog\n");
 874
 875     log(LOG_ERR, "%s: watchdog\n", ifp->if_xname);
 876     ifp->if_oerrors++;
 877     */
 878
 879     if (sc->gone) {
 880         return;
 881     }
 882
 883     ifp->if_flags &= ~IFF_OACTIVE;
 884     ep_if_start(ifp);
 885     ep_intr(ifp->if_softc);
 886 }
 887
 888 static void
 889 epstop(struct ep_softc *sc)
 890 {
 891     if (sc->gone) {
 892         return;
 893     }
 894
 895     outw(BASE + EP_COMMAND, RX_DISABLE);
 896     outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
 897     while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
 898     outw(BASE + EP_COMMAND, TX_DISABLE);
 899     outw(BASE + EP_COMMAND, STOP_TRANSCEIVER);
 900     outw(BASE + EP_COMMAND, RX_RESET);
 901     outw(BASE + EP_COMMAND, TX_RESET);
 902     while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
 903     outw(BASE + EP_COMMAND, C_INTR_LATCH);
 904     outw(BASE + EP_COMMAND, SET_RD_0_MASK);
 905     outw(BASE + EP_COMMAND, SET_INTR_MASK);
 906     outw(BASE + EP_COMMAND, SET_RX_FILTER);
 907 }