sys/dev/netif/ex/if_ex.c

   1 /*
   2  * Copyright (c) 1996, Javier Martín Rueda (jmrueda@diatel.upm.es)
   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 unmodified, this list of conditions, and the following
  10  *    disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  * $FreeBSD: src/sys/dev/ex/if_ex.c,v 1.26.2.3 2001/03/05 05:33:20 imp Exp $
  28  * $DragonFly: src/sys/dev/netif/ex/if_ex.c,v 1.17 2005/05/27 15:36:09 joerg Exp $
  29  *
  30  * MAINTAINER: Matthew N. Dodd <winter@jurai.net>
  31  *                             <mdodd@FreeBSD.org>
  32  */
  33
  34 /*
  35  * Intel EtherExpress Pro/10, Pro/10+ Ethernet driver
  36  *
  37  * Revision history:
  38  *
  39  * 30-Oct-1996: first beta version. Inet and BPF supported, but no multicast.
  40  */
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/sockio.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/socket.h>
  48
  49 #include <sys/module.h>
  50 #include <sys/bus.h>
  51
  52 #include <machine/bus.h>
  53 #include <machine/resource.h>
  54 #include <sys/rman.h>
  55
  56 #include <net/if.h>
  57 #include <net/ifq_var.h>
  58 #include <net/if.h>
  59 #include <net/if_arp.h>
  60 #include <net/if_media.h>
  61 #include <net/ethernet.h>
  62 #include <net/bpf.h>
  63
  64 #include <netinet/in.h>
  65 #include <netinet/if_ether.h>
  66 #include <machine/clock.h>
  67
  68
  69 #include <bus/isa/isavar.h>
  70 #include <bus/isa/pnpvar.h>
  71
  72 #include "if_exreg.h"
  73 #include "if_exvar.h"
  74
  75 DECLARE_DUMMY_MODULE(if_ex);
  76
  77 #ifdef EXDEBUG
  78 # define Start_End 1
  79 # define Rcvd_Pkts 2
  80 # define Sent_Pkts 4
  81 # define Status    8
  82 static int debug_mask = 0;
  83 static int exintr_count = 0;
  84 # define DODEBUG(level, action) if (level & debug_mask) action
  85 #else
  86 # define DODEBUG(level, action)
  87 #endif
  88
  89 char irq2eemap[] =
  90         { -1, -1, 0, 1, -1, 2, -1, -1, -1, 0, 3, 4, -1, -1, -1, -1 };
  91 u_char ee2irqmap[] =
  92         { 9, 3, 5, 10, 11, 0, 0, 0 };
  93
  94 char plus_irq2eemap[] =
  95         { -1, -1, -1, 0, 1, 2, -1, 3, -1, 4, 5, 6, 7, -1, -1, -1 };
  96 u_char plus_ee2irqmap[] =
  97         { 3, 4, 5, 7, 9, 10, 11, 12 };
  98
  99 /* Network Interface Functions */
 100 static void     ex_init         (void *);
 101 static void     ex_start        (struct ifnet *);
 102 static int      ex_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
 103 static void     ex_watchdog     (struct ifnet *);
 104
 105 /* ifmedia Functions    */
 106 static int      ex_ifmedia_upd  (struct ifnet *);
 107 static void     ex_ifmedia_sts  (struct ifnet *, struct ifmediareq *);
 108
 109 static int      ex_get_media    (u_int32_t iobase);
 110
 111 static void     ex_reset        (struct ex_softc *);
 112
 113 static void     ex_tx_intr      (struct ex_softc *);
 114 static void     ex_rx_intr      (struct ex_softc *);
 115
 116 int
 117 look_for_card (u_int32_t iobase)
 118 {
 119         int count1, count2;
 120
 121         /*
 122          * Check for the i82595 signature, and check that the round robin
 123          * counter actually advances.
 124          */
 125         if (((count1 = inb(iobase + ID_REG)) & Id_Mask) != Id_Sig)
 126                 return(0);
 127         count2 = inb(iobase + ID_REG);
 128         count2 = inb(iobase + ID_REG);
 129         count2 = inb(iobase + ID_REG);
 130
 131         return((count2 & Counter_bits) == ((count1 + 0xc0) & Counter_bits));
 132 }
 133
 134 void
 135 ex_get_address (u_int32_t iobase, u_char *enaddr)
 136 {
 137         u_int16_t       eaddr_tmp;
 138
 139         eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Lo);
 140         enaddr[5] = eaddr_tmp & 0xff;
 141         enaddr[4] = eaddr_tmp >> 8;
 142         eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Mid);
 143         enaddr[3] = eaddr_tmp & 0xff;
 144         enaddr[2] = eaddr_tmp >> 8;
 145         eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Hi);
 146         enaddr[1] = eaddr_tmp & 0xff;
 147         enaddr[0] = eaddr_tmp >> 8;
 148
 149         return;
 150 }
 151
 152 int
 153 ex_card_type (u_char *enaddr)
 154 {
 155         if ((enaddr[0] == 0x00) && (enaddr[1] == 0xA0) && (enaddr[2] == 0xC9))
 156                 return (CARD_TYPE_EX_10_PLUS);
 157
 158         return (CARD_TYPE_EX_10);
 159 }
 160
 161 /*
 162  * Caller is responsible for eventually calling
 163  * ex_release_resources() on failure.
 164  */
 165 int
 166 ex_alloc_resources (device_t dev)
 167 {
 168         struct ex_softc *       sc = device_get_softc(dev);
 169         int                     error = 0;
 170
 171         sc->ioport = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &sc->ioport_rid,
 172             RF_ACTIVE);
 173         if (!sc->ioport) {
 174                 device_printf(dev, "No I/O space?!\n");
 175                 error = ENOMEM;
 176                 goto bad;
 177         }
 178
 179         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
 180             RF_ACTIVE);
 181
 182         if (!sc->irq) {
 183                 device_printf(dev, "No IRQ?!\n");
 184                 error = ENOMEM;
 185                 goto bad;
 186         }
 187
 188 bad:
 189         return (error);
 190 }
 191
 192 void
 193 ex_release_resources (device_t dev)
 194 {
 195         struct ex_softc *       sc = device_get_softc(dev);
 196
 197         if (sc->ih) {
 198                 bus_teardown_intr(dev, sc->irq, sc->ih);
 199                 sc->ih = NULL;
 200         }
 201
 202         if (sc->ioport) {
 203                 bus_release_resource(dev, SYS_RES_IOPORT,
 204                                         sc->ioport_rid, sc->ioport);
 205                 sc->ioport = NULL;
 206         }
 207
 208         if (sc->irq) {
 209                 bus_release_resource(dev, SYS_RES_IRQ,
 210                                         sc->irq_rid, sc->irq);
 211                 sc->irq = NULL;
 212         }
 213
 214         return;
 215 }
 216
 217 int
 218 ex_attach(device_t dev)
 219 {
 220         struct ex_softc *       sc = device_get_softc(dev);
 221         struct ifnet *          ifp = &sc->arpcom.ac_if;
 222         struct ifmedia *        ifm;
 223         int                     unit = device_get_unit(dev);
 224         u_int16_t               temp;
 225
 226         /* work out which set of irq <-> internal tables to use */
 227         if (ex_card_type(sc->arpcom.ac_enaddr) == CARD_TYPE_EX_10_PLUS) {
 228                 sc->irq2ee = plus_irq2eemap;
 229                 sc->ee2irq = plus_ee2irqmap;
 230         } else {
 231                 sc->irq2ee = irq2eemap;
 232                 sc->ee2irq = ee2irqmap;
 233         }
 234
 235         sc->mem_size = CARD_RAM_SIZE;   /* XXX This should be read from the card itself. */
 236
 237         /*
 238          * Initialize the ifnet structure.
 239          */
 240         ifp->if_softc = sc;
 241         if_initname(ifp, "ex", unit);
 242         ifp->if_mtu = ETHERMTU;
 243         ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST /* XXX not done yet. | IFF_MULTICAST */;
 244         ifp->if_start = ex_start;
 245         ifp->if_ioctl = ex_ioctl;
 246         ifp->if_watchdog = ex_watchdog;
 247         ifp->if_init = ex_init;
 248         ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 249         ifq_set_ready(&ifp->if_snd);
 250
 251         ifmedia_init(&sc->ifmedia, 0, ex_ifmedia_upd, ex_ifmedia_sts);
 252
 253         temp = eeprom_read(sc->iobase, EE_W5);
 254         if (temp & EE_W5_PORT_TPE)
 255                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL);
 256         if (temp & EE_W5_PORT_BNC)
 257                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_2, 0, NULL);
 258         if (temp & EE_W5_PORT_AUI)
 259                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_5, 0, NULL);
 260
 261         ifmedia_set(&sc->ifmedia, ex_get_media(sc->iobase));
 262
 263         ifm = &sc->ifmedia;
 264         ifm->ifm_media = ifm->ifm_cur->ifm_media;
 265         ex_ifmedia_upd(ifp);
 266
 267         /*
 268          * Attach the interface.
 269          */
 270         ether_ifattach(ifp, sc->arpcom.ac_enaddr);
 271
 272         return(0);
 273 }
 274
 275 static void
 276 ex_init(void *xsc)
 277 {
 278         struct ex_softc *       sc = (struct ex_softc *) xsc;
 279         struct ifnet *          ifp = &sc->arpcom.ac_if;
 280         int                     s;
 281         int                     i;
 282         int                     iobase = sc->iobase;
 283         unsigned short          temp_reg;
 284
 285         DODEBUG(Start_End, printf("ex_init%d: start\n", ifp->if_dunit););
 286
 287         if (TAILQ_FIRST(&ifp->if_addrhead) == NULL) {
 288                 return;
 289         }
 290         s = splimp();
 291         ifp->if_timer = 0;
 292
 293         /*
 294          * Load the ethernet address into the card.
 295          */
 296         outb(iobase + CMD_REG, Bank2_Sel);
 297         temp_reg = inb(iobase + EEPROM_REG);
 298         if (temp_reg & Trnoff_Enable) {
 299                 outb(iobase + EEPROM_REG, temp_reg & ~Trnoff_Enable);
 300         }
 301         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 302                 outb(iobase + I_ADDR_REG0 + i, sc->arpcom.ac_enaddr[i]);
 303         }
 304         /*
 305          * - Setup transmit chaining and discard bad received frames.
 306          * - Match broadcast.
 307          * - Clear test mode.
 308          * - Set receiving mode.
 309          * - Set IRQ number.
 310          */
 311         outb(iobase + REG1, inb(iobase + REG1) | Tx_Chn_Int_Md | Tx_Chn_ErStp | Disc_Bad_Fr);
 312         outb(iobase + REG2, inb(iobase + REG2) | No_SA_Ins | RX_CRC_InMem);
 313         outb(iobase + REG3, inb(iobase + REG3) & 0x3f /* XXX constants. */ );
 314         outb(iobase + CMD_REG, Bank1_Sel);
 315         outb(iobase + INT_NO_REG, (inb(iobase + INT_NO_REG) & 0xf8) | sc->irq2ee[sc->irq_no]);
 316
 317         /*
 318          * Divide the available memory in the card into rcv and xmt buffers.
 319          * By default, I use the first 3/4 of the memory for the rcv buffer,
 320          * and the remaining 1/4 of the memory for the xmt buffer.
 321          */
 322         sc->rx_mem_size = sc->mem_size * 3 / 4;
 323         sc->tx_mem_size = sc->mem_size - sc->rx_mem_size;
 324         sc->rx_lower_limit = 0x0000;
 325         sc->rx_upper_limit = sc->rx_mem_size - 2;
 326         sc->tx_lower_limit = sc->rx_mem_size;
 327         sc->tx_upper_limit = sc->mem_size - 2;
 328         outb(iobase + RCV_LOWER_LIMIT_REG, sc->rx_lower_limit >> 8);
 329         outb(iobase + RCV_UPPER_LIMIT_REG, sc->rx_upper_limit >> 8);
 330         outb(iobase + XMT_LOWER_LIMIT_REG, sc->tx_lower_limit >> 8);
 331         outb(iobase + XMT_UPPER_LIMIT_REG, sc->tx_upper_limit >> 8);
 332
 333         /*
 334          * Enable receive and transmit interrupts, and clear any pending int.
 335          */
 336         outb(iobase + REG1, inb(iobase + REG1) | TriST_INT);
 337         outb(iobase + CMD_REG, Bank0_Sel);
 338         outb(iobase + MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
 339         outb(iobase + STATUS_REG, All_Int);
 340
 341         /*
 342          * Initialize receive and transmit ring buffers.
 343          */
 344         outw(iobase + RCV_BAR, sc->rx_lower_limit);
 345         sc->rx_head = sc->rx_lower_limit;
 346         outw(iobase + RCV_STOP_REG, sc->rx_upper_limit | 0xfe);
 347         outw(iobase + XMT_BAR, sc->tx_lower_limit);
 348         sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
 349
 350         ifp->if_flags |= IFF_RUNNING;
 351         ifp->if_flags &= ~IFF_OACTIVE;
 352         DODEBUG(Status, printf("OIDLE init\n"););
 353
 354         /*
 355          * Final reset of the board, and enable operation.
 356          */
 357         outb(iobase + CMD_REG, Sel_Reset_CMD);
 358         DELAY(2);
 359         outb(iobase + CMD_REG, Rcv_Enable_CMD);
 360
 361         ex_start(ifp);
 362         splx(s);
 363
 364         DODEBUG(Start_End, printf("ex_init%d: finish\n", ifp->if_dunit););
 365 }
 366
 367
 368 static void
 369 ex_start(struct ifnet *ifp)
 370 {
 371         struct ex_softc *       sc = ifp->if_softc;
 372         int                     iobase = sc->iobase;
 373         int                     i, s, len, data_len, avail, dest, next;
 374         unsigned char           tmp16[2];
 375         struct mbuf *           opkt;
 376         struct mbuf *           m;
 377
 378         DODEBUG(Start_End, printf("ex_start%d: start\n", unit););
 379
 380         s = splimp();
 381
 382         /*
 383          * Main loop: send outgoing packets to network card until there are no
 384          * more packets left, or the card cannot accept any more yet.
 385          */
 386         while ((ifp->if_flags & IFF_OACTIVE) == 0) {
 387                 opkt = ifq_poll(&ifp->if_snd);
 388                 if (opkt == NULL)
 389                         break;
 390
 391                 /*
 392                  * Ensure there is enough free transmit buffer space for
 393                  * this packet, including its header. Note: the header
 394                  * cannot wrap around the end of the transmit buffer and
 395                  * must be kept together, so we allow space for twice the
 396                  * length of the header, just in case.
 397                  */
 398
 399                 for (len = 0, m = opkt; m != NULL; m = m->m_next) {
 400                         len += m->m_len;
 401                 }
 402
 403                 data_len = len;
 404
 405                 DODEBUG(Sent_Pkts, printf("1. Sending packet with %d data bytes. ", data_len););
 406
 407                 if (len & 1) {
 408                         len += XMT_HEADER_LEN + 1;
 409                 } else {
 410                         len += XMT_HEADER_LEN;
 411                 }
 412
 413                 if ((i = sc->tx_tail - sc->tx_head) >= 0) {
 414                         avail = sc->tx_mem_size - i;
 415                 } else {
 416                         avail = -i;
 417                 }
 418
 419                 DODEBUG(Sent_Pkts, printf("i=%d, avail=%d\n", i, avail););
 420
 421                 if (avail >= len + XMT_HEADER_LEN) {
 422                         opkt = ifq_dequeue(&ifp->if_snd);
 423
 424 #ifdef EX_PSA_INTR
 425                         /*
 426                          * Disable rx and tx interrupts, to avoid corruption
 427                          * of the host address register by interrupt service
 428                          * routines.
 429                          * XXX Is this necessary with splimp() enabled?
 430                          */
 431                         outb(iobase + MASK_REG, All_Int);
 432 #endif
 433
 434                         /*
 435                          * Compute the start and end addresses of this
 436                          * frame in the tx buffer.
 437                          */
 438                         dest = sc->tx_tail;
 439                         next = dest + len;
 440
 441                         if (next > sc->tx_upper_limit) {
 442                                 if ((sc->tx_upper_limit + 2 - sc->tx_tail) <=
 443                                     XMT_HEADER_LEN) {
 444                                         dest = sc->tx_lower_limit;
 445                                         next = dest + len;
 446                                 } else {
 447                                         next = sc->tx_lower_limit +
 448                                                 next - sc->tx_upper_limit - 2;
 449                                 }
 450                         }
 451
 452                         /*
 453                          * Build the packet frame in the card's ring buffer.
 454                          */
 455                         DODEBUG(Sent_Pkts, printf("2. dest=%d, next=%d. ", dest, next););
 456
 457                         outw(iobase + HOST_ADDR_REG, dest);
 458                         outw(iobase + IO_PORT_REG, Transmit_CMD);
 459                         outw(iobase + IO_PORT_REG, 0);
 460                         outw(iobase + IO_PORT_REG, next);
 461                         outw(iobase + IO_PORT_REG, data_len);
 462
 463                         /*
 464                          * Output the packet data to the card. Ensure all
 465                          * transfers are 16-bit wide, even if individual
 466                          * mbufs have odd length.
 467                          */
 468
 469                         for (m = opkt, i = 0; m != NULL; m = m->m_next) {
 470                                 DODEBUG(Sent_Pkts, printf("[%d]", m->m_len););
 471                                 if (i) {
 472                                         tmp16[1] = *(mtod(m, caddr_t));
 473                                         outsw(iobase + IO_PORT_REG, tmp16, 1);
 474                                 }
 475                                 outsw(iobase + IO_PORT_REG,
 476                                       mtod(m, caddr_t) + i, (m->m_len - i) / 2);
 477
 478                                 if ((i = (m->m_len - i) & 1) != 0) {
 479                                         tmp16[0] = *(mtod(m, caddr_t) +
 480                                                    m->m_len - 1);
 481                                 }
 482                         }
 483                         if (i) {
 484                                 outsw(iobase + IO_PORT_REG, tmp16, 1);
 485                         }
 486
 487                         /*
 488                          * If there were other frames chained, update the
 489                          * chain in the last one.
 490                          */
 491                         if (sc->tx_head != sc->tx_tail) {
 492                                 if (sc->tx_tail != dest) {
 493                                         outw(iobase + HOST_ADDR_REG,
 494                                              sc->tx_last + XMT_Chain_Point);
 495                                         outw(iobase + IO_PORT_REG, dest);
 496                                 }
 497                                 outw(iobase + HOST_ADDR_REG,
 498                                      sc->tx_last + XMT_Byte_Count);
 499                                 i = inw(iobase + IO_PORT_REG);
 500                                 outw(iobase + HOST_ADDR_REG,
 501                                      sc->tx_last + XMT_Byte_Count);
 502                                 outw(iobase + IO_PORT_REG, i | Ch_bit);
 503                         }
 504
 505                         /*
 506                          * Resume normal operation of the card:
 507                          * - Make a dummy read to flush the DRAM write
 508                          *   pipeline.
 509                          * - Enable receive and transmit interrupts.
 510                          * - Send Transmit or Resume_XMT command, as
 511                          *   appropriate.
 512                          */
 513                         inw(iobase + IO_PORT_REG);
 514 #ifdef EX_PSA_INTR
 515                         outb(iobase + MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
 516 #endif
 517                         if (sc->tx_head == sc->tx_tail) {
 518                                 outw(iobase + XMT_BAR, dest);
 519                                 outb(iobase + CMD_REG, Transmit_CMD);
 520                                 sc->tx_head = dest;
 521                                 DODEBUG(Sent_Pkts, printf("Transmit\n"););
 522                         } else {
 523                                 outb(iobase + CMD_REG, Resume_XMT_List_CMD);
 524                                 DODEBUG(Sent_Pkts, printf("Resume\n"););
 525                         }
 526
 527                         sc->tx_last = dest;
 528                         sc->tx_tail = next;
 529
 530                         BPF_MTAP(ifp, opkt);
 531
 532                         ifp->if_timer = 2;
 533                         ifp->if_opackets++;
 534                         m_freem(opkt);
 535                 } else {
 536                         ifp->if_flags |= IFF_OACTIVE;
 537                         DODEBUG(Status, printf("OACTIVE start\n"););
 538                 }
 539         }
 540
 541         splx(s);
 542
 543         DODEBUG(Start_End, printf("ex_start%d: finish\n", unit););
 544 }
 545
 546 void
 547 ex_stop(struct ex_softc *sc)
 548 {
 549         int iobase = sc->iobase;
 550
 551         DODEBUG(Start_End, printf("ex_stop%d: start\n", unit););
 552
 553         /*
 554          * Disable card operation:
 555          * - Disable the interrupt line.
 556          * - Flush transmission and disable reception.
 557          * - Mask and clear all interrupts.
 558          * - Reset the 82595.
 559          */
 560         outb(iobase + CMD_REG, Bank1_Sel);
 561         outb(iobase + REG1, inb(iobase + REG1) & ~TriST_INT);
 562         outb(iobase + CMD_REG, Bank0_Sel);
 563         outb(iobase + CMD_REG, Rcv_Stop);
 564         sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
 565         sc->tx_last = 0; /* XXX I think these two lines are not necessary, because ex_init will always be called again to reinit the interface. */
 566         outb(iobase + MASK_REG, All_Int);
 567         outb(iobase + STATUS_REG, All_Int);
 568         outb(iobase + CMD_REG, Reset_CMD);
 569         DELAY(200);
 570
 571         DODEBUG(Start_End, printf("ex_stop%d: finish\n", unit););
 572
 573         return;
 574 }
 575
 576 void
 577 ex_intr(void *arg)
 578 {
 579         struct ex_softc *       sc = (struct ex_softc *)arg;
 580         struct ifnet *  ifp = &sc->arpcom.ac_if;
 581         int                     iobase = sc->iobase;
 582         int                     int_status, send_pkts;
 583
 584         DODEBUG(Start_End, printf("ex_intr%d: start\n", unit););
 585
 586 #ifdef EXDEBUG
 587         if (++exintr_count != 1)
 588                 printf("WARNING: nested interrupt (%d). Mail the author.\n", exintr_count);
 589 #endif
 590
 591         send_pkts = 0;
 592         while ((int_status = inb(iobase + STATUS_REG)) & (Tx_Int | Rx_Int)) {
 593                 if (int_status & Rx_Int) {
 594                         outb(iobase + STATUS_REG, Rx_Int);
 595
 596                         ex_rx_intr(sc);
 597                 } else if (int_status & Tx_Int) {
 598                         outb(iobase + STATUS_REG, Tx_Int);
 599
 600                         ex_tx_intr(sc);
 601                         send_pkts = 1;
 602                 }
 603         }
 604
 605         /*
 606          * If any packet has been transmitted, and there are queued packets to
 607          * be sent, attempt to send more packets to the network card.
 608          */
 609
 610         if (send_pkts && !ifq_is_empty(&ifp->if_snd))
 611                 ex_start(ifp);
 612
 613 #ifdef EXDEBUG
 614         exintr_count--;
 615 #endif
 616
 617         DODEBUG(Start_End, printf("ex_intr%d: finish\n", unit););
 618
 619         return;
 620 }
 621
 622 static void
 623 ex_tx_intr(struct ex_softc *sc)
 624 {
 625         struct ifnet *  ifp = &sc->arpcom.ac_if;
 626         int             iobase = sc->iobase;
 627         int             tx_status;
 628
 629         DODEBUG(Start_End, printf("ex_tx_intr%d: start\n", unit););
 630
 631         /*
 632          * - Cancel the watchdog.
 633          * For all packets transmitted since last transmit interrupt:
 634          * - Advance chain pointer to next queued packet.
 635          * - Update statistics.
 636          */
 637
 638         ifp->if_timer = 0;
 639
 640         while (sc->tx_head != sc->tx_tail) {
 641                 outw(iobase + HOST_ADDR_REG, sc->tx_head);
 642
 643                 if (! inw(iobase + IO_PORT_REG) & Done_bit)
 644                         break;
 645
 646                 tx_status = inw(iobase + IO_PORT_REG);
 647                 sc->tx_head = inw(iobase + IO_PORT_REG);
 648
 649                 if (tx_status & TX_OK_bit) {
 650                         ifp->if_opackets++;
 651                 } else {
 652                         ifp->if_oerrors++;
 653                 }
 654
 655                 ifp->if_collisions += tx_status & No_Collisions_bits;
 656         }
 657
 658         /*
 659          * The card should be ready to accept more packets now.
 660          */
 661
 662         ifp->if_flags &= ~IFF_OACTIVE;
 663
 664         DODEBUG(Status, printf("OIDLE tx_intr\n"););
 665         DODEBUG(Start_End, printf("ex_tx_intr%d: finish\n", unit););
 666
 667         return;
 668 }
 669
 670 static void
 671 ex_rx_intr(struct ex_softc *sc)
 672 {
 673         struct ifnet *          ifp = &sc->arpcom.ac_if;
 674         int                     iobase = sc->iobase;
 675         int                     rx_status;
 676         int                     pkt_len;
 677         int                     QQQ;
 678         struct mbuf *           m;
 679         struct mbuf *           ipkt;
 680
 681         DODEBUG(Start_End, printf("ex_rx_intr%d: start\n", unit););
 682
 683         /*
 684          * For all packets received since last receive interrupt:
 685          * - If packet ok, read it into a new mbuf and queue it to interface,
 686          *   updating statistics.
 687          * - If packet bad, just discard it, and update statistics.
 688          * Finally, advance receive stop limit in card's memory to new location.
 689          */
 690
 691         outw(iobase + HOST_ADDR_REG, sc->rx_head);
 692
 693         while (inw(iobase + IO_PORT_REG) == RCV_Done) {
 694
 695                 rx_status = inw(iobase + IO_PORT_REG);
 696                 sc->rx_head = inw(iobase + IO_PORT_REG);
 697                 QQQ = pkt_len = inw(iobase + IO_PORT_REG);
 698
 699                 if (rx_status & RCV_OK_bit) {
 700                         MGETHDR(m, MB_DONTWAIT, MT_DATA);
 701                         ipkt = m;
 702                         if (ipkt == NULL) {
 703                                 ifp->if_iqdrops++;
 704                         } else {
 705                                 ipkt->m_pkthdr.rcvif = ifp;
 706                                 ipkt->m_pkthdr.len = pkt_len;
 707                                 ipkt->m_len = MHLEN;
 708
 709                                 while (pkt_len > 0) {
 710                                         if (pkt_len > MINCLSIZE) {
 711                                                 MCLGET(m, MB_DONTWAIT);
 712                                                 if (m->m_flags & M_EXT) {
 713                                                         m->m_len = MCLBYTES;
 714                                                 } else {
 715                                                         m_freem(ipkt);
 716                                                         ifp->if_iqdrops++;
 717                                                         goto rx_another;
 718                                                 }
 719                                         }
 720                                         m->m_len = min(m->m_len, pkt_len);
 721
 722           /*
 723            * NOTE: I'm assuming that all mbufs allocated are of even length,
 724            * except for the last one in an odd-length packet.
 725            */
 726
 727                                         insw(iobase + IO_PORT_REG,
 728                                              mtod(m, caddr_t), m->m_len / 2);
 729
 730                                         if (m->m_len & 1) {
 731                                                 *(mtod(m, caddr_t) + m->m_len - 1) = inb(iobase + IO_PORT_REG);
 732                                         }
 733                                         pkt_len -= m->m_len;
 734
 735                                         if (pkt_len > 0) {
 736                                                 MGET(m->m_next, MB_DONTWAIT, MT_DATA);
 737                                                 if (m->m_next == NULL) {
 738                                                         m_freem(ipkt);
 739                                                         ifp->if_iqdrops++;
 740                                                         goto rx_another;
 741                                                 }
 742                                                 m = m->m_next;
 743                                                 m->m_len = MLEN;
 744                                         }
 745                                 }
 746                                 (*ifp->if_input)(ifp, ipkt);
 747                                 ifp->if_ipackets++;
 748                         }
 749                 } else {
 750                         ifp->if_ierrors++;
 751                 }
 752                 outw(iobase + HOST_ADDR_REG, sc->rx_head);
 753 rx_another: ;
 754         }
 755
 756         if (sc->rx_head < sc->rx_lower_limit + 2)
 757                 outw(iobase + RCV_STOP_REG, sc->rx_upper_limit);
 758         else
 759                 outw(iobase + RCV_STOP_REG, sc->rx_head - 2);
 760
 761         DODEBUG(Start_End, printf("ex_rx_intr%d: finish\n", unit););
 762
 763         return;
 764 }
 765
 766
 767 static int
 768 ex_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
 769 {
 770         struct ex_softc *       sc = ifp->if_softc;
 771         struct ifreq *          ifr = (struct ifreq *)data;
 772         int                     s;
 773         int                     error = 0;
 774
 775         DODEBUG(Start_End, printf("ex_ioctl%d: start ", ifp->if_dunit););
 776
 777         s = splimp();
 778
 779         switch(cmd) {
 780                 case SIOCSIFFLAGS:
 781                         DODEBUG(Start_End, printf("SIOCSIFFLAGS"););
 782                         if ((ifp->if_flags & IFF_UP) == 0 &&
 783                             (ifp->if_flags & IFF_RUNNING)) {
 784
 785                                 ifp->if_flags &= ~IFF_RUNNING;
 786                                 ex_stop(sc);
 787                         } else {
 788                                 ex_init(sc);
 789                         }
 790                         break;
 791 #ifdef NODEF
 792                 case SIOCGHWADDR:
 793                         DODEBUG(Start_End, printf("SIOCGHWADDR"););
 794                         bcopy((caddr_t)sc->sc_addr, (caddr_t)&ifr->ifr_data,
 795                               sizeof(sc->sc_addr));
 796                         break;
 797 #endif
 798                 case SIOCADDMULTI:
 799                         DODEBUG(Start_End, printf("SIOCADDMULTI"););
 800                 case SIOCDELMULTI:
 801                         DODEBUG(Start_End, printf("SIOCDELMULTI"););
 802                         /* XXX Support not done yet. */
 803                         error = EINVAL;
 804                         break;
 805                 case SIOCSIFMEDIA:
 806                 case SIOCGIFMEDIA:
 807                         error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, cmd);
 808                         break;
 809                 default:
 810                         DODEBUG(Start_End, printf("unknown"););
 811                         error = ether_ioctl(ifp, cmd, data);
 812                         break;
 813         }
 814
 815         splx(s);
 816
 817         DODEBUG(Start_End, printf("\nex_ioctl%d: finish\n", ifp->if_dunit););
 818
 819         return(error);
 820 }
 821
 822
 823 static void
 824 ex_reset(struct ex_softc *sc)
 825 {
 826         int s;
 827
 828         DODEBUG(Start_End, printf("ex_reset%d: start\n", unit););
 829
 830         s = splimp();
 831
 832         ex_stop(sc);
 833         ex_init(sc);
 834
 835         splx(s);
 836
 837         DODEBUG(Start_End, printf("ex_reset%d: finish\n", unit););
 838
 839         return;
 840 }
 841
 842 static void
 843 ex_watchdog(struct ifnet *ifp)
 844 {
 845         struct ex_softc *       sc = ifp->if_softc;
 846
 847         DODEBUG(Start_End, printf("ex_watchdog%d: start\n", ifp->if_dunit););
 848
 849         ifp->if_flags &= ~IFF_OACTIVE;
 850
 851         DODEBUG(Status, printf("OIDLE watchdog\n"););
 852
 853         ifp->if_oerrors++;
 854         ex_reset(sc);
 855         ex_start(ifp);
 856
 857         DODEBUG(Start_End, printf("ex_watchdog%d: finish\n", ifp->if_dunit););
 858
 859         return;
 860 }
 861
 862 static int
 863 ex_get_media (u_int32_t iobase)
 864 {
 865         int     tmp;
 866
 867         outb(iobase + CMD_REG, Bank2_Sel);
 868         tmp = inb(iobase + REG3);
 869         outb(iobase + CMD_REG, Bank0_Sel);
 870
 871         if (tmp & TPE_bit)
 872                 return(IFM_ETHER|IFM_10_T);
 873         if (tmp & BNC_bit)
 874                 return(IFM_ETHER|IFM_10_2);
 875
 876         return (IFM_ETHER|IFM_10_5);
 877 }
 878
 879 static int
 880 ex_ifmedia_upd (ifp)
 881         struct ifnet *          ifp;
 882 {
 883
 884         return (0);
 885 }
 886
 887 static void
 888 ex_ifmedia_sts(ifp, ifmr)
 889         struct ifnet *          ifp;
 890         struct ifmediareq *     ifmr;
 891 {
 892         struct ex_softc *       sc = ifp->if_softc;
 893
 894         ifmr->ifm_active = ex_get_media(sc->iobase);
 895
 896         return;
 897 }
 898
 899 u_short
 900 eeprom_read(u_int32_t iobase, int location)
 901 {
 902         int i;
 903         u_short data = 0;
 904         int ee_addr;
 905         int read_cmd = location | EE_READ_CMD;
 906         short ctrl_val = EECS;
 907
 908         ee_addr = iobase + EEPROM_REG;
 909         outb(iobase + CMD_REG, Bank2_Sel);
 910         outb(ee_addr, EECS);
 911         for (i = 8; i >= 0; i--) {
 912                 short outval = (read_cmd & (1 << i)) ? ctrl_val | EEDI : ctrl_val;
 913                 outb(ee_addr, outval);
 914                 outb(ee_addr, outval | EESK);
 915                 DELAY(3);
 916                 outb(ee_addr, outval);
 917                 DELAY(2);
 918         }
 919         outb(ee_addr, ctrl_val);
 920
 921         for (i = 16; i > 0; i--) {
 922                 outb(ee_addr, ctrl_val | EESK);
 923                 DELAY(3);
 924                 data = (data << 1) | ((inb(ee_addr) & EEDO) ? 1 : 0);
 925                 outb(ee_addr, ctrl_val);
 926                 DELAY(2);
 927         }
 928
 929         ctrl_val &= ~EECS;
 930         outb(ee_addr, ctrl_val | EESK);
 931         DELAY(3);
 932         outb(ee_addr, ctrl_val);
 933         DELAY(2);
 934         outb(iobase + CMD_REG, Bank0_Sel);
 935         return(data);
 936 }