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 1.26 2008/08/22 08:33:59 swildner 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 #include <sys/module.h>
  49 #include <sys/bus.h>
  50 #include <sys/rman.h>
  51 #include <sys/serialize.h>
  52 #include <sys/thread2.h>
  53
  54 #include <net/if.h>
  55 #include <net/ifq_var.h>
  56 #include <net/if.h>
  57 #include <net/if_arp.h>
  58 #include <net/if_media.h>
  59 #include <net/ethernet.h>
  60 #include <net/bpf.h>
  61
  62 #include <netinet/in.h>
  63 #include <netinet/if_ether.h>
  64
  65 #include <machine/clock.h>
  66
  67
  68 #include <bus/isa/isavar.h>
  69 #include <bus/isa/pnpvar.h>
  70
  71 #include "if_exreg.h"
  72 #include "if_exvar.h"
  73
  74 DECLARE_DUMMY_MODULE(if_ex);
  75
  76 #ifdef EXDEBUG
  77 # define Start_End 1
  78 # define Rcvd_Pkts 2
  79 # define Sent_Pkts 4
  80 # define Status    8
  81 static int debug_mask = 0;
  82 static int exintr_count = 0;
  83 # define DODEBUG(level, action) if (level & debug_mask) action
  84 #else
  85 # define DODEBUG(level, action)
  86 #endif
  87
  88 char irq2eemap[] =
  89         { -1, -1, 0, 1, -1, 2, -1, -1, -1, 0, 3, 4, -1, -1, -1, -1 };
  90 u_char ee2irqmap[] =
  91         { 9, 3, 5, 10, 11, 0, 0, 0 };
  92
  93 char plus_irq2eemap[] =
  94         { -1, -1, -1, 0, 1, 2, -1, 3, -1, 4, 5, 6, 7, -1, -1, -1 };
  95 u_char plus_ee2irqmap[] =
  96         { 3, 4, 5, 7, 9, 10, 11, 12 };
  97
  98 /* Network Interface Functions */
  99 static void     ex_init         (void *);
 100 static void     ex_start        (struct ifnet *);
 101 static int      ex_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
 102 static void     ex_watchdog     (struct ifnet *);
 103
 104 /* ifmedia Functions    */
 105 static int      ex_ifmedia_upd  (struct ifnet *);
 106 static void     ex_ifmedia_sts  (struct ifnet *, struct ifmediareq *);
 107
 108 static int      ex_get_media    (u_int32_t iobase);
 109
 110 static void     ex_reset        (struct ex_softc *);
 111
 112 static void     ex_tx_intr      (struct ex_softc *);
 113 static void     ex_rx_intr      (struct ex_softc *);
 114
 115 int
 116 look_for_card (u_int32_t iobase)
 117 {
 118         int count1, count2;
 119
 120         /*
 121          * Check for the i82595 signature, and check that the round robin
 122          * counter actually advances.
 123          */
 124         if (((count1 = inb(iobase + ID_REG)) & Id_Mask) != Id_Sig)
 125                 return(0);
 126         count2 = inb(iobase + ID_REG);
 127         count2 = inb(iobase + ID_REG);
 128         count2 = inb(iobase + ID_REG);
 129
 130         return((count2 & Counter_bits) == ((count1 + 0xc0) & Counter_bits));
 131 }
 132
 133 void
 134 ex_get_address (u_int32_t iobase, u_char *enaddr)
 135 {
 136         u_int16_t       eaddr_tmp;
 137
 138         eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Lo);
 139         enaddr[5] = eaddr_tmp & 0xff;
 140         enaddr[4] = eaddr_tmp >> 8;
 141         eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Mid);
 142         enaddr[3] = eaddr_tmp & 0xff;
 143         enaddr[2] = eaddr_tmp >> 8;
 144         eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Hi);
 145         enaddr[1] = eaddr_tmp & 0xff;
 146         enaddr[0] = eaddr_tmp >> 8;
 147
 148         return;
 149 }
 150
 151 int
 152 ex_card_type (u_char *enaddr)
 153 {
 154         if ((enaddr[0] == 0x00) && (enaddr[1] == 0xA0) && (enaddr[2] == 0xC9))
 155                 return (CARD_TYPE_EX_10_PLUS);
 156
 157         return (CARD_TYPE_EX_10);
 158 }
 159
 160 /*
 161  * Caller is responsible for eventually calling
 162  * ex_release_resources() on failure.
 163  */
 164 int
 165 ex_alloc_resources (device_t dev)
 166 {
 167         struct ex_softc *       sc = device_get_softc(dev);
 168         int                     error = 0;
 169
 170         sc->ioport = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &sc->ioport_rid,
 171             RF_ACTIVE);
 172         if (!sc->ioport) {
 173                 device_printf(dev, "No I/O space?!\n");
 174                 error = ENOMEM;
 175                 goto bad;
 176         }
 177
 178         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
 179             RF_ACTIVE);
 180
 181         if (!sc->irq) {
 182                 device_printf(dev, "No IRQ?!\n");
 183                 error = ENOMEM;
 184                 goto bad;
 185         }
 186
 187 bad:
 188         return (error);
 189 }
 190
 191 void
 192 ex_release_resources (device_t dev)
 193 {
 194         struct ex_softc *       sc = device_get_softc(dev);
 195
 196         if (sc->ih) {
 197                 bus_teardown_intr(dev, sc->irq, sc->ih);
 198                 sc->ih = NULL;
 199         }
 200
 201         if (sc->ioport) {
 202                 bus_release_resource(dev, SYS_RES_IOPORT,
 203                                         sc->ioport_rid, sc->ioport);
 204                 sc->ioport = NULL;
 205         }
 206
 207         if (sc->irq) {
 208                 bus_release_resource(dev, SYS_RES_IRQ,
 209                                         sc->irq_rid, sc->irq);
 210                 sc->irq = NULL;
 211         }
 212
 213         return;
 214 }
 215
 216 int
 217 ex_attach(device_t dev)
 218 {
 219         struct ex_softc *       sc = device_get_softc(dev);
 220         struct ifnet *          ifp = &sc->arpcom.ac_if;
 221         struct ifmedia *        ifm;
 222         int                     unit = device_get_unit(dev);
 223         u_int16_t               temp;
 224
 225         /* work out which set of irq <-> internal tables to use */
 226         if (ex_card_type(sc->arpcom.ac_enaddr) == CARD_TYPE_EX_10_PLUS) {
 227                 sc->irq2ee = plus_irq2eemap;
 228                 sc->ee2irq = plus_ee2irqmap;
 229         } else {
 230                 sc->irq2ee = irq2eemap;
 231                 sc->ee2irq = ee2irqmap;
 232         }
 233
 234         sc->mem_size = CARD_RAM_SIZE;   /* XXX This should be read from the card itself. */
 235
 236         /*
 237          * Initialize the ifnet structure.
 238          */
 239         ifp->if_softc = sc;
 240         if_initname(ifp, "ex", unit);
 241         ifp->if_mtu = ETHERMTU;
 242         ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST /* XXX not done yet. | IFF_MULTICAST */;
 243         ifp->if_start = ex_start;
 244         ifp->if_ioctl = ex_ioctl;
 245         ifp->if_watchdog = ex_watchdog;
 246         ifp->if_init = ex_init;
 247         ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 248         ifq_set_ready(&ifp->if_snd);
 249
 250         ifmedia_init(&sc->ifmedia, 0, ex_ifmedia_upd, ex_ifmedia_sts);
 251
 252         temp = eeprom_read(sc->iobase, EE_W5);
 253         if (temp & EE_W5_PORT_TPE)
 254                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL);
 255         if (temp & EE_W5_PORT_BNC)
 256                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_2, 0, NULL);
 257         if (temp & EE_W5_PORT_AUI)
 258                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_5, 0, NULL);
 259
 260         ifmedia_set(&sc->ifmedia, ex_get_media(sc->iobase));
 261
 262         ifm = &sc->ifmedia;
 263         ifm->ifm_media = ifm->ifm_cur->ifm_media;
 264         ex_ifmedia_upd(ifp);
 265
 266         /*
 267          * Attach the interface.
 268          */
 269         ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
 270
 271         return(0);
 272 }
 273
 274 static void
 275 ex_init(void *xsc)
 276 {
 277         struct ex_softc *       sc = (struct ex_softc *) xsc;
 278         struct ifnet *          ifp = &sc->arpcom.ac_if;
 279         int                     i;
 280         int                     iobase = sc->iobase;
 281         unsigned short          temp_reg;
 282
 283         DODEBUG(Start_End, kprintf("ex_init%d: start\n", ifp->if_dunit););
 284
 285         ifp->if_timer = 0;
 286
 287         /*
 288          * Load the ethernet address into the card.
 289          */
 290         outb(iobase + CMD_REG, Bank2_Sel);
 291         temp_reg = inb(iobase + EEPROM_REG);
 292         if (temp_reg & Trnoff_Enable) {
 293                 outb(iobase + EEPROM_REG, temp_reg & ~Trnoff_Enable);
 294         }
 295         for (i = 0; i < ETHER_ADDR_LEN; i++) {
 296                 outb(iobase + I_ADDR_REG0 + i, sc->arpcom.ac_enaddr[i]);
 297         }
 298         /*
 299          * - Setup transmit chaining and discard bad received frames.
 300          * - Match broadcast.
 301          * - Clear test mode.
 302          * - Set receiving mode.
 303          * - Set IRQ number.
 304          */
 305         outb(iobase + REG1, inb(iobase + REG1) | Tx_Chn_Int_Md | Tx_Chn_ErStp | Disc_Bad_Fr);
 306         outb(iobase + REG2, inb(iobase + REG2) | No_SA_Ins | RX_CRC_InMem);
 307         outb(iobase + REG3, inb(iobase + REG3) & 0x3f /* XXX constants. */ );
 308         outb(iobase + CMD_REG, Bank1_Sel);
 309         outb(iobase + INT_NO_REG, (inb(iobase + INT_NO_REG) & 0xf8) | sc->irq2ee[sc->irq_no]);
 310
 311         /*
 312          * Divide the available memory in the card into rcv and xmt buffers.
 313          * By default, I use the first 3/4 of the memory for the rcv buffer,
 314          * and the remaining 1/4 of the memory for the xmt buffer.
 315          */
 316         sc->rx_mem_size = sc->mem_size * 3 / 4;
 317         sc->tx_mem_size = sc->mem_size - sc->rx_mem_size;
 318         sc->rx_lower_limit = 0x0000;
 319         sc->rx_upper_limit = sc->rx_mem_size - 2;
 320         sc->tx_lower_limit = sc->rx_mem_size;
 321         sc->tx_upper_limit = sc->mem_size - 2;
 322         outb(iobase + RCV_LOWER_LIMIT_REG, sc->rx_lower_limit >> 8);
 323         outb(iobase + RCV_UPPER_LIMIT_REG, sc->rx_upper_limit >> 8);
 324         outb(iobase + XMT_LOWER_LIMIT_REG, sc->tx_lower_limit >> 8);
 325         outb(iobase + XMT_UPPER_LIMIT_REG, sc->tx_upper_limit >> 8);
 326
 327         /*
 328          * Enable receive and transmit interrupts, and clear any pending int.
 329          */
 330         outb(iobase + REG1, inb(iobase + REG1) | TriST_INT);
 331         outb(iobase + CMD_REG, Bank0_Sel);
 332         outb(iobase + MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
 333         outb(iobase + STATUS_REG, All_Int);
 334
 335         /*
 336          * Initialize receive and transmit ring buffers.
 337          */
 338         outw(iobase + RCV_BAR, sc->rx_lower_limit);
 339         sc->rx_head = sc->rx_lower_limit;
 340         outw(iobase + RCV_STOP_REG, sc->rx_upper_limit | 0xfe);
 341         outw(iobase + XMT_BAR, sc->tx_lower_limit);
 342         sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
 343
 344         ifp->if_flags |= IFF_RUNNING;
 345         ifp->if_flags &= ~IFF_OACTIVE;
 346         DODEBUG(Status, kprintf("OIDLE init\n"););
 347
 348         /*
 349          * Final reset of the board, and enable operation.
 350          */
 351         outb(iobase + CMD_REG, Sel_Reset_CMD);
 352         DELAY(2);
 353         outb(iobase + CMD_REG, Rcv_Enable_CMD);
 354
 355         if (!ifq_is_empty(&ifp->if_snd))
 356                 if_devstart(ifp);
 357
 358         DODEBUG(Start_End, kprintf("ex_init%d: finish\n", ifp->if_dunit););
 359 }
 360
 361
 362 static void
 363 ex_start(struct ifnet *ifp)
 364 {
 365         struct ex_softc *       sc = ifp->if_softc;
 366         int                     iobase = sc->iobase;
 367         int                     i, len, data_len, avail, dest, next;
 368         unsigned char           tmp16[2];
 369         struct mbuf *           opkt;
 370         struct mbuf *           m;
 371
 372         DODEBUG(Start_End, kprintf("ex_start%d: start\n", unit););
 373
 374         /*
 375          * Main loop: send outgoing packets to network card until there are no
 376          * more packets left, or the card cannot accept any more yet.
 377          */
 378         while ((ifp->if_flags & IFF_OACTIVE) == 0) {
 379                 opkt = ifq_dequeue(&ifp->if_snd, NULL);
 380                 if (opkt == NULL)
 381                         break;
 382
 383                 /*
 384                  * Ensure there is enough free transmit buffer space for
 385                  * this packet, including its header. Note: the header
 386                  * cannot wrap around the end of the transmit buffer and
 387                  * must be kept together, so we allow space for twice the
 388                  * length of the header, just in case.
 389                  */
 390
 391                 for (len = 0, m = opkt; m != NULL; m = m->m_next) {
 392                         len += m->m_len;
 393                 }
 394
 395                 data_len = len;
 396
 397                 DODEBUG(Sent_Pkts, kprintf("1. Sending packet with %d data bytes. ", data_len););
 398
 399                 if (len & 1) {
 400                         len += XMT_HEADER_LEN + 1;
 401                 } else {
 402                         len += XMT_HEADER_LEN;
 403                 }
 404
 405                 if ((i = sc->tx_tail - sc->tx_head) >= 0) {
 406                         avail = sc->tx_mem_size - i;
 407                 } else {
 408                         avail = -i;
 409                 }
 410
 411                 DODEBUG(Sent_Pkts, kprintf("i=%d, avail=%d\n", i, avail););
 412
 413                 if (avail >= len + XMT_HEADER_LEN) {
 414 #ifdef EX_PSA_INTR
 415                         /*
 416                          * Disable rx and tx interrupts, to avoid corruption
 417                          * of the host address register by interrupt service
 418                          * routines.
 419                          * XXX Is this necessary with splimp() enabled?
 420                          */
 421                         outb(iobase + MASK_REG, All_Int);
 422 #endif
 423
 424                         /*
 425                          * Compute the start and end addresses of this
 426                          * frame in the tx buffer.
 427                          */
 428                         dest = sc->tx_tail;
 429                         next = dest + len;
 430
 431                         if (next > sc->tx_upper_limit) {
 432                                 if ((sc->tx_upper_limit + 2 - sc->tx_tail) <=
 433                                     XMT_HEADER_LEN) {
 434                                         dest = sc->tx_lower_limit;
 435                                         next = dest + len;
 436                                 } else {
 437                                         next = sc->tx_lower_limit +
 438                                                 next - sc->tx_upper_limit - 2;
 439                                 }
 440                         }
 441
 442                         /*
 443                          * Build the packet frame in the card's ring buffer.
 444                          */
 445                         DODEBUG(Sent_Pkts, kprintf("2. dest=%d, next=%d. ", dest, next););
 446
 447                         outw(iobase + HOST_ADDR_REG, dest);
 448                         outw(iobase + IO_PORT_REG, Transmit_CMD);
 449                         outw(iobase + IO_PORT_REG, 0);
 450                         outw(iobase + IO_PORT_REG, next);
 451                         outw(iobase + IO_PORT_REG, data_len);
 452
 453                         /*
 454                          * Output the packet data to the card. Ensure all
 455                          * transfers are 16-bit wide, even if individual
 456                          * mbufs have odd length.
 457                          */
 458
 459                         for (m = opkt, i = 0; m != NULL; m = m->m_next) {
 460                                 DODEBUG(Sent_Pkts, kprintf("[%d]", m->m_len););
 461                                 if (i) {
 462                                         tmp16[1] = *(mtod(m, caddr_t));
 463                                         outsw(iobase + IO_PORT_REG, tmp16, 1);
 464                                 }
 465                                 outsw(iobase + IO_PORT_REG,
 466                                       mtod(m, caddr_t) + i, (m->m_len - i) / 2);
 467
 468                                 if ((i = (m->m_len - i) & 1) != 0) {
 469                                         tmp16[0] = *(mtod(m, caddr_t) +
 470                                                    m->m_len - 1);
 471                                 }
 472                         }
 473                         if (i) {
 474                                 outsw(iobase + IO_PORT_REG, tmp16, 1);
 475                         }
 476
 477                         /*
 478                          * If there were other frames chained, update the
 479                          * chain in the last one.
 480                          */
 481                         if (sc->tx_head != sc->tx_tail) {
 482                                 if (sc->tx_tail != dest) {
 483                                         outw(iobase + HOST_ADDR_REG,
 484                                              sc->tx_last + XMT_Chain_Point);
 485                                         outw(iobase + IO_PORT_REG, dest);
 486                                 }
 487                                 outw(iobase + HOST_ADDR_REG,
 488                                      sc->tx_last + XMT_Byte_Count);
 489                                 i = inw(iobase + IO_PORT_REG);
 490                                 outw(iobase + HOST_ADDR_REG,
 491                                      sc->tx_last + XMT_Byte_Count);
 492                                 outw(iobase + IO_PORT_REG, i | Ch_bit);
 493                         }
 494
 495                         /*
 496                          * Resume normal operation of the card:
 497                          * - Make a dummy read to flush the DRAM write
 498                          *   pipeline.
 499                          * - Enable receive and transmit interrupts.
 500                          * - Send Transmit or Resume_XMT command, as
 501                          *   appropriate.
 502                          */
 503                         inw(iobase + IO_PORT_REG);
 504 #ifdef EX_PSA_INTR
 505                         outb(iobase + MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
 506 #endif
 507                         if (sc->tx_head == sc->tx_tail) {
 508                                 outw(iobase + XMT_BAR, dest);
 509                                 outb(iobase + CMD_REG, Transmit_CMD);
 510                                 sc->tx_head = dest;
 511                                 DODEBUG(Sent_Pkts, kprintf("Transmit\n"););
 512                         } else {
 513                                 outb(iobase + CMD_REG, Resume_XMT_List_CMD);
 514                                 DODEBUG(Sent_Pkts, kprintf("Resume\n"););
 515                         }
 516
 517                         sc->tx_last = dest;
 518                         sc->tx_tail = next;
 519
 520                         BPF_MTAP(ifp, opkt);
 521
 522                         ifp->if_timer = 2;
 523                         ifp->if_opackets++;
 524                         m_freem(opkt);
 525                 } else {
 526                         ifp->if_flags |= IFF_OACTIVE;
 527                         ifq_prepend(&ifp->if_snd, opkt);
 528                         DODEBUG(Status, kprintf("OACTIVE start\n"););
 529                 }
 530         }
 531         DODEBUG(Start_End, kprintf("ex_start%d: finish\n", unit););
 532 }
 533
 534 void
 535 ex_stop(struct ex_softc *sc)
 536 {
 537         int iobase = sc->iobase;
 538
 539         DODEBUG(Start_End, kprintf("ex_stop%d: start\n", unit););
 540
 541         /*
 542          * Disable card operation:
 543          * - Disable the interrupt line.
 544          * - Flush transmission and disable reception.
 545          * - Mask and clear all interrupts.
 546          * - Reset the 82595.
 547          */
 548         outb(iobase + CMD_REG, Bank1_Sel);
 549         outb(iobase + REG1, inb(iobase + REG1) & ~TriST_INT);
 550         outb(iobase + CMD_REG, Bank0_Sel);
 551         outb(iobase + CMD_REG, Rcv_Stop);
 552         sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
 553         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. */
 554         outb(iobase + MASK_REG, All_Int);
 555         outb(iobase + STATUS_REG, All_Int);
 556         outb(iobase + CMD_REG, Reset_CMD);
 557         DELAY(200);
 558
 559         DODEBUG(Start_End, kprintf("ex_stop%d: finish\n", unit););
 560
 561         return;
 562 }
 563
 564 void
 565 ex_intr(void *arg)
 566 {
 567         struct ex_softc *       sc = (struct ex_softc *)arg;
 568         struct ifnet *  ifp = &sc->arpcom.ac_if;
 569         int                     iobase = sc->iobase;
 570         int                     int_status, send_pkts;
 571
 572         DODEBUG(Start_End, kprintf("ex_intr%d: start\n", unit););
 573
 574 #ifdef EXDEBUG
 575         if (++exintr_count != 1)
 576                 kprintf("WARNING: nested interrupt (%d). Mail the author.\n", exintr_count);
 577 #endif
 578
 579         send_pkts = 0;
 580         while ((int_status = inb(iobase + STATUS_REG)) & (Tx_Int | Rx_Int)) {
 581                 if (int_status & Rx_Int) {
 582                         outb(iobase + STATUS_REG, Rx_Int);
 583
 584                         ex_rx_intr(sc);
 585                 } else if (int_status & Tx_Int) {
 586                         outb(iobase + STATUS_REG, Tx_Int);
 587
 588                         ex_tx_intr(sc);
 589                         send_pkts = 1;
 590                 }
 591         }
 592
 593         /*
 594          * If any packet has been transmitted, and there are queued packets to
 595          * be sent, attempt to send more packets to the network card.
 596          */
 597
 598         if (send_pkts && !ifq_is_empty(&ifp->if_snd))
 599                 if_devstart(ifp);
 600
 601 #ifdef EXDEBUG
 602         exintr_count--;
 603 #endif
 604
 605         DODEBUG(Start_End, kprintf("ex_intr%d: finish\n", unit););
 606
 607         return;
 608 }
 609
 610 static void
 611 ex_tx_intr(struct ex_softc *sc)
 612 {
 613         struct ifnet *  ifp = &sc->arpcom.ac_if;
 614         int             iobase = sc->iobase;
 615         int             tx_status;
 616
 617         DODEBUG(Start_End, kprintf("ex_tx_intr%d: start\n", unit););
 618
 619         /*
 620          * - Cancel the watchdog.
 621          * For all packets transmitted since last transmit interrupt:
 622          * - Advance chain pointer to next queued packet.
 623          * - Update statistics.
 624          */
 625
 626         ifp->if_timer = 0;
 627
 628         while (sc->tx_head != sc->tx_tail) {
 629                 outw(iobase + HOST_ADDR_REG, sc->tx_head);
 630
 631                 if (! inw(iobase + IO_PORT_REG) & Done_bit)
 632                         break;
 633
 634                 tx_status = inw(iobase + IO_PORT_REG);
 635                 sc->tx_head = inw(iobase + IO_PORT_REG);
 636
 637                 if (tx_status & TX_OK_bit) {
 638                         ifp->if_opackets++;
 639                 } else {
 640                         ifp->if_oerrors++;
 641                 }
 642
 643                 ifp->if_collisions += tx_status & No_Collisions_bits;
 644         }
 645
 646         /*
 647          * The card should be ready to accept more packets now.
 648          */
 649
 650         ifp->if_flags &= ~IFF_OACTIVE;
 651
 652         DODEBUG(Status, kprintf("OIDLE tx_intr\n"););
 653         DODEBUG(Start_End, kprintf("ex_tx_intr%d: finish\n", unit););
 654
 655         return;
 656 }
 657
 658 static void
 659 ex_rx_intr(struct ex_softc *sc)
 660 {
 661         struct ifnet *          ifp = &sc->arpcom.ac_if;
 662         int                     iobase = sc->iobase;
 663         int                     rx_status;
 664         int                     pkt_len;
 665         struct mbuf *           m;
 666         struct mbuf *           ipkt;
 667
 668         DODEBUG(Start_End, kprintf("ex_rx_intr%d: start\n", unit););
 669
 670         /*
 671          * For all packets received since last receive interrupt:
 672          * - If packet ok, read it into a new mbuf and queue it to interface,
 673          *   updating statistics.
 674          * - If packet bad, just discard it, and update statistics.
 675          * Finally, advance receive stop limit in card's memory to new location.
 676          */
 677
 678         outw(iobase + HOST_ADDR_REG, sc->rx_head);
 679
 680         while (inw(iobase + IO_PORT_REG) == RCV_Done) {
 681
 682                 rx_status = inw(iobase + IO_PORT_REG);
 683                 sc->rx_head = inw(iobase + IO_PORT_REG);
 684                 pkt_len = inw(iobase + IO_PORT_REG);
 685
 686                 if (rx_status & RCV_OK_bit) {
 687                         MGETHDR(m, MB_DONTWAIT, MT_DATA);
 688                         ipkt = m;
 689                         if (ipkt == NULL) {
 690                                 ifp->if_iqdrops++;
 691                         } else {
 692                                 ipkt->m_pkthdr.rcvif = ifp;
 693                                 ipkt->m_pkthdr.len = pkt_len;
 694                                 ipkt->m_len = MHLEN;
 695
 696                                 while (pkt_len > 0) {
 697                                         if (pkt_len > MINCLSIZE) {
 698                                                 MCLGET(m, MB_DONTWAIT);
 699                                                 if (m->m_flags & M_EXT) {
 700                                                         m->m_len = MCLBYTES;
 701                                                 } else {
 702                                                         m_freem(ipkt);
 703                                                         ifp->if_iqdrops++;
 704                                                         goto rx_another;
 705                                                 }
 706                                         }
 707                                         m->m_len = min(m->m_len, pkt_len);
 708
 709           /*
 710            * NOTE: I'm assuming that all mbufs allocated are of even length,
 711            * except for the last one in an odd-length packet.
 712            */
 713
 714                                         insw(iobase + IO_PORT_REG,
 715                                              mtod(m, caddr_t), m->m_len / 2);
 716
 717                                         if (m->m_len & 1) {
 718                                                 *(mtod(m, caddr_t) + m->m_len - 1) = inb(iobase + IO_PORT_REG);
 719                                         }
 720                                         pkt_len -= m->m_len;
 721
 722                                         if (pkt_len > 0) {
 723                                                 MGET(m->m_next, MB_DONTWAIT, MT_DATA);
 724                                                 if (m->m_next == NULL) {
 725                                                         m_freem(ipkt);
 726                                                         ifp->if_iqdrops++;
 727                                                         goto rx_another;
 728                                                 }
 729                                                 m = m->m_next;
 730                                                 m->m_len = MLEN;
 731                                         }
 732                                 }
 733                                 ifp->if_input(ifp, ipkt);
 734                                 ifp->if_ipackets++;
 735                         }
 736                 } else {
 737                         ifp->if_ierrors++;
 738                 }
 739                 outw(iobase + HOST_ADDR_REG, sc->rx_head);
 740 rx_another: ;
 741         }
 742
 743         if (sc->rx_head < sc->rx_lower_limit + 2)
 744                 outw(iobase + RCV_STOP_REG, sc->rx_upper_limit);
 745         else
 746                 outw(iobase + RCV_STOP_REG, sc->rx_head - 2);
 747
 748         DODEBUG(Start_End, kprintf("ex_rx_intr%d: finish\n", unit););
 749
 750         return;
 751 }
 752
 753
 754 static int
 755 ex_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
 756 {
 757         struct ex_softc *       sc = ifp->if_softc;
 758         struct ifreq *          ifr = (struct ifreq *)data;
 759         int                     error = 0;
 760
 761         DODEBUG(Start_End, kprintf("ex_ioctl%d: start ", ifp->if_dunit););
 762
 763         switch(cmd) {
 764                 case SIOCSIFFLAGS:
 765                         DODEBUG(Start_End, kprintf("SIOCSIFFLAGS"););
 766                         if ((ifp->if_flags & IFF_UP) == 0 &&
 767                             (ifp->if_flags & IFF_RUNNING)) {
 768
 769                                 ifp->if_flags &= ~IFF_RUNNING;
 770                                 ex_stop(sc);
 771                         } else {
 772                                 ex_init(sc);
 773                         }
 774                         break;
 775 #ifdef NODEF
 776                 case SIOCGHWADDR:
 777                         DODEBUG(Start_End, kprintf("SIOCGHWADDR"););
 778                         bcopy((caddr_t)sc->sc_addr, (caddr_t)&ifr->ifr_data,
 779                               sizeof(sc->sc_addr));
 780                         break;
 781 #endif
 782                 case SIOCADDMULTI:
 783                         DODEBUG(Start_End, kprintf("SIOCADDMULTI"););
 784                 case SIOCDELMULTI:
 785                         DODEBUG(Start_End, kprintf("SIOCDELMULTI"););
 786                         /* XXX Support not done yet. */
 787                         error = EINVAL;
 788                         break;
 789                 case SIOCSIFMEDIA:
 790                 case SIOCGIFMEDIA:
 791                         error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, cmd);
 792                         break;
 793                 default:
 794                         DODEBUG(Start_End, kprintf("unknown"););
 795                         error = ether_ioctl(ifp, cmd, data);
 796                         break;
 797         }
 798
 799         DODEBUG(Start_End, kprintf("\nex_ioctl%d: finish\n", ifp->if_dunit););
 800
 801         return(error);
 802 }
 803
 804
 805 static void
 806 ex_reset(struct ex_softc *sc)
 807 {
 808         DODEBUG(Start_End, kprintf("ex_reset%d: start\n", unit););
 809
 810         ex_stop(sc);
 811         ex_init(sc);
 812
 813         DODEBUG(Start_End, kprintf("ex_reset%d: finish\n", unit););
 814 }
 815
 816 static void
 817 ex_watchdog(struct ifnet *ifp)
 818 {
 819         struct ex_softc *       sc = ifp->if_softc;
 820
 821         DODEBUG(Start_End, kprintf("ex_watchdog%d: start\n", ifp->if_dunit););
 822
 823         ifp->if_flags &= ~IFF_OACTIVE;
 824
 825         DODEBUG(Status, kprintf("OIDLE watchdog\n"););
 826
 827         ifp->if_oerrors++;
 828         ex_reset(sc);
 829         if_devstart(ifp);
 830
 831         DODEBUG(Start_End, kprintf("ex_watchdog%d: finish\n", ifp->if_dunit););
 832
 833         return;
 834 }
 835
 836 static int
 837 ex_get_media (u_int32_t iobase)
 838 {
 839         int     tmp;
 840
 841         outb(iobase + CMD_REG, Bank2_Sel);
 842         tmp = inb(iobase + REG3);
 843         outb(iobase + CMD_REG, Bank0_Sel);
 844
 845         if (tmp & TPE_bit)
 846                 return(IFM_ETHER|IFM_10_T);
 847         if (tmp & BNC_bit)
 848                 return(IFM_ETHER|IFM_10_2);
 849
 850         return (IFM_ETHER|IFM_10_5);
 851 }
 852
 853 static int
 854 ex_ifmedia_upd (struct ifnet *ifp)
 855 {
 856
 857         return (0);
 858 }
 859
 860 static void
 861 ex_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
 862 {
 863         struct ex_softc *       sc = ifp->if_softc;
 864
 865         ifmr->ifm_active = ex_get_media(sc->iobase);
 866
 867         return;
 868 }
 869
 870 u_short
 871 eeprom_read(u_int32_t iobase, int location)
 872 {
 873         int i;
 874         u_short data = 0;
 875         int ee_addr;
 876         int read_cmd = location | EE_READ_CMD;
 877         short ctrl_val = EECS;
 878
 879         ee_addr = iobase + EEPROM_REG;
 880         outb(iobase + CMD_REG, Bank2_Sel);
 881         outb(ee_addr, EECS);
 882         for (i = 8; i >= 0; i--) {
 883                 short outval = (read_cmd & (1 << i)) ? ctrl_val | EEDI : ctrl_val;
 884                 outb(ee_addr, outval);
 885                 outb(ee_addr, outval | EESK);
 886                 DELAY(3);
 887                 outb(ee_addr, outval);
 888                 DELAY(2);
 889         }
 890         outb(ee_addr, ctrl_val);
 891
 892         for (i = 16; i > 0; i--) {
 893                 outb(ee_addr, ctrl_val | EESK);
 894                 DELAY(3);
 895                 data = (data << 1) | ((inb(ee_addr) & EEDO) ? 1 : 0);
 896                 outb(ee_addr, ctrl_val);
 897                 DELAY(2);
 898         }
 899
 900         ctrl_val &= ~EECS;
 901         outb(ee_addr, ctrl_val | EESK);
 902         DELAY(3);
 903         outb(ee_addr, ctrl_val);
 904         DELAY(2);
 905         outb(iobase + CMD_REG, Bank0_Sel);
 906         return(data);
 907 }