The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/ex/if_ex.c

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    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: releng/5.1/sys/dev/ex/if_ex.c 112801 2003-03-29 15:38:53Z mdodd $
   28  *
   29  * MAINTAINER: Matthew N. Dodd <winter@jurai.net>
   30  *                             <mdodd@FreeBSD.org>
   31  */
   32 
   33 /*
   34  * Intel EtherExpress Pro/10, Pro/10+ Ethernet driver
   35  *
   36  * Revision history:
   37  *
   38  * dd-mmm-yyyy: Multicast support ported from NetBSD's if_iy driver.
   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/if_arp.h>
   58 #include <net/if_dl.h>
   59 #include <net/if_media.h> 
   60 #include <net/ethernet.h>
   61 #include <net/bpf.h>
   62 
   63 #include <netinet/in.h>
   64 #include <netinet/if_ether.h>
   65 
   66 
   67 #include <isa/isavar.h>
   68 #include <isa/pnpvar.h>
   69 
   70 #include <dev/ex/if_exreg.h>
   71 #include <dev/ex/if_exvar.h>
   72 
   73 #ifdef EXDEBUG
   74 # define Start_End 1
   75 # define Rcvd_Pkts 2
   76 # define Sent_Pkts 4
   77 # define Status    8
   78 static int debug_mask = 0;
   79 static int exintr_count = 0;
   80 # define DODEBUG(level, action) if (level & debug_mask) action
   81 #else
   82 # define DODEBUG(level, action)
   83 #endif
   84 
   85 devclass_t ex_devclass;
   86 
   87 char irq2eemap[] =
   88         { -1, -1, 0, 1, -1, 2, -1, -1, -1, 0, 3, 4, -1, -1, -1, -1 };
   89 u_char ee2irqmap[] =
   90         { 9, 3, 5, 10, 11, 0, 0, 0 };
   91                 
   92 char plus_irq2eemap[] =
   93         { -1, -1, -1, 0, 1, 2, -1, 3, -1, 4, 5, 6, 7, -1, -1, -1 };
   94 u_char plus_ee2irqmap[] =
   95         { 3, 4, 5, 7, 9, 10, 11, 12 };
   96 
   97 /* Network Interface Functions */
   98 static void     ex_init         (void *);
   99 static void     ex_start        (struct ifnet *);
  100 static int      ex_ioctl        (struct ifnet *, u_long, caddr_t);
  101 static void     ex_watchdog     (struct ifnet *);
  102 
  103 /* ifmedia Functions    */
  104 static int      ex_ifmedia_upd  (struct ifnet *);
  105 static void     ex_ifmedia_sts  (struct ifnet *, struct ifmediareq *);
  106 
  107 static int      ex_get_media    (u_int32_t iobase);
  108 
  109 static void     ex_reset        (struct ex_softc *);
  110 static void     ex_setmulti     (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(dev, SYS_RES_IOPORT, &sc->ioport_rid,
  171                                         0, ~0, 1, 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(dev, SYS_RES_IRQ, &sc->irq_rid,
  179                                         0, ~0, 1, 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         ifp->if_unit = unit;
  241         ifp->if_name = "ex";
  242         ifp->if_mtu = ETHERMTU;
  243         ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
  244         ifp->if_output = ether_output;
  245         ifp->if_start = ex_start;
  246         ifp->if_ioctl = ex_ioctl;
  247         ifp->if_watchdog = ex_watchdog;
  248         ifp->if_init = ex_init;
  249         ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
  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_add(&sc->ifmedia, IFM_ETHER|IFM_AUTO, 0, NULL);
  262         ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL);
  263         ifmedia_set(&sc->ifmedia, ex_get_media(sc->iobase));
  264 
  265         ifm = &sc->ifmedia;
  266         ifm->ifm_media = ifm->ifm_cur->ifm_media;
  267         ex_ifmedia_upd(ifp);
  268 
  269         /*
  270          * Attach the interface.
  271          */
  272         ether_ifattach(ifp, sc->arpcom.ac_enaddr);
  273 
  274         device_printf(sc->dev, "Ethernet address %6D\n",
  275                         sc->arpcom.ac_enaddr, ":");
  276 
  277         return(0);
  278 }
  279 
  280 int
  281 ex_detach (device_t dev)
  282 {
  283         struct ex_softc *sc;
  284         struct ifnet    *ifp;
  285 
  286         sc = device_get_softc(dev);
  287         ifp = &sc->arpcom.ac_if;
  288 
  289         ex_stop(sc);
  290 
  291         ifp->if_flags &= ~IFF_RUNNING;
  292         ether_ifdetach(ifp);
  293 
  294         ex_release_resources(dev);
  295 
  296         return (0);
  297 }
  298 
  299 static void
  300 ex_init(void *xsc)
  301 {
  302         struct ex_softc *       sc = (struct ex_softc *) xsc;
  303         struct ifnet *          ifp = &sc->arpcom.ac_if;
  304         int                     s;
  305         int                     i;
  306         register int            iobase = sc->iobase;
  307         unsigned short          temp_reg;
  308 
  309         DODEBUG(Start_End, printf("ex_init%d: start\n", ifp->if_unit););
  310 
  311         if (TAILQ_FIRST(&ifp->if_addrhead) == NULL) {
  312                 return;
  313         }
  314         s = splimp();
  315         ifp->if_timer = 0;
  316 
  317         /*
  318          * Load the ethernet address into the card.
  319          */
  320         outb(iobase + CMD_REG, Bank2_Sel);
  321         temp_reg = inb(iobase + EEPROM_REG);
  322         if (temp_reg & Trnoff_Enable) {
  323                 outb(iobase + EEPROM_REG, temp_reg & ~Trnoff_Enable);
  324         }
  325         for (i = 0; i < ETHER_ADDR_LEN; i++) {
  326                 outb(iobase + I_ADDR_REG0 + i, sc->arpcom.ac_enaddr[i]);
  327         }
  328         /*
  329          * - Setup transmit chaining and discard bad received frames.
  330          * - Match broadcast.
  331          * - Clear test mode.
  332          * - Set receiving mode.
  333          * - Set IRQ number.
  334          */
  335         outb(iobase + REG1, inb(iobase + REG1) | Tx_Chn_Int_Md | Tx_Chn_ErStp | Disc_Bad_Fr);
  336         outb(iobase + REG2, inb(iobase + REG2) | No_SA_Ins | RX_CRC_InMem);
  337         outb(iobase + REG3, inb(iobase + REG3) & 0x3f /* XXX constants. */ );
  338         outb(iobase + CMD_REG, Bank1_Sel);
  339         outb(iobase + INT_NO_REG, (inb(iobase + INT_NO_REG) & 0xf8) | sc->irq2ee[sc->irq_no]);
  340 
  341         /*
  342          * Divide the available memory in the card into rcv and xmt buffers.
  343          * By default, I use the first 3/4 of the memory for the rcv buffer,
  344          * and the remaining 1/4 of the memory for the xmt buffer.
  345          */
  346         sc->rx_mem_size = sc->mem_size * 3 / 4;
  347         sc->tx_mem_size = sc->mem_size - sc->rx_mem_size;
  348         sc->rx_lower_limit = 0x0000;
  349         sc->rx_upper_limit = sc->rx_mem_size - 2;
  350         sc->tx_lower_limit = sc->rx_mem_size;
  351         sc->tx_upper_limit = sc->mem_size - 2;
  352         outb(iobase + RCV_LOWER_LIMIT_REG, sc->rx_lower_limit >> 8);
  353         outb(iobase + RCV_UPPER_LIMIT_REG, sc->rx_upper_limit >> 8);
  354         outb(iobase + XMT_LOWER_LIMIT_REG, sc->tx_lower_limit >> 8);
  355         outb(iobase + XMT_UPPER_LIMIT_REG, sc->tx_upper_limit >> 8);
  356         
  357         /*
  358          * Enable receive and transmit interrupts, and clear any pending int.
  359          */
  360         outb(iobase + REG1, inb(iobase + REG1) | TriST_INT);
  361         outb(iobase + CMD_REG, Bank0_Sel);
  362         outb(iobase + MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
  363         outb(iobase + STATUS_REG, All_Int);
  364 
  365         /*
  366          * Initialize receive and transmit ring buffers.
  367          */
  368         outw(iobase + RCV_BAR, sc->rx_lower_limit);
  369         sc->rx_head = sc->rx_lower_limit;
  370         outw(iobase + RCV_STOP_REG, sc->rx_upper_limit | 0xfe);
  371         outw(iobase + XMT_BAR, sc->tx_lower_limit);
  372         sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
  373 
  374         ifp->if_flags |= IFF_RUNNING;
  375         ifp->if_flags &= ~IFF_OACTIVE;
  376         DODEBUG(Status, printf("OIDLE init\n"););
  377         
  378         ex_setmulti(sc);
  379         
  380         /*
  381          * Final reset of the board, and enable operation.
  382          */
  383         outb(iobase + CMD_REG, Sel_Reset_CMD);
  384         DELAY(2);
  385         outb(iobase + CMD_REG, Rcv_Enable_CMD);
  386 
  387         ex_start(ifp);
  388         splx(s);
  389 
  390         DODEBUG(Start_End, printf("ex_init%d: finish\n", ifp->if_unit););
  391 }
  392 
  393 
  394 static void
  395 ex_start(struct ifnet *ifp)
  396 {
  397         struct ex_softc *       sc = ifp->if_softc;
  398         int                     iobase = sc->iobase;
  399         int                     i, s, len, data_len, avail, dest, next;
  400         unsigned char           tmp16[2];
  401         struct mbuf *           opkt;
  402         struct mbuf *           m;
  403 
  404         DODEBUG(Start_End, printf("ex_start%d: start\n", unit););
  405 
  406         s = splimp();
  407 
  408         /*
  409          * Main loop: send outgoing packets to network card until there are no
  410          * more packets left, or the card cannot accept any more yet.
  411          */
  412         while (((opkt = ifp->if_snd.ifq_head) != NULL) &&
  413                !(ifp->if_flags & IFF_OACTIVE)) {
  414 
  415                 /*
  416                  * Ensure there is enough free transmit buffer space for
  417                  * this packet, including its header. Note: the header
  418                  * cannot wrap around the end of the transmit buffer and
  419                  * must be kept together, so we allow space for twice the
  420                  * length of the header, just in case.
  421                  */
  422 
  423                 for (len = 0, m = opkt; m != NULL; m = m->m_next) {
  424                         len += m->m_len;
  425                 }
  426 
  427                 data_len = len;
  428 
  429                 DODEBUG(Sent_Pkts, printf("1. Sending packet with %d data bytes. ", data_len););
  430 
  431                 if (len & 1) {
  432                         len += XMT_HEADER_LEN + 1;
  433                 } else {
  434                         len += XMT_HEADER_LEN;
  435                 }
  436 
  437                 if ((i = sc->tx_tail - sc->tx_head) >= 0) {
  438                         avail = sc->tx_mem_size - i;
  439                 } else {
  440                         avail = -i;
  441                 }
  442 
  443                 DODEBUG(Sent_Pkts, printf("i=%d, avail=%d\n", i, avail););
  444 
  445                 if (avail >= len + XMT_HEADER_LEN) {
  446                         IF_DEQUEUE(&ifp->if_snd, opkt);
  447 
  448 #ifdef EX_PSA_INTR      
  449                         /*
  450                          * Disable rx and tx interrupts, to avoid corruption
  451                          * of the host address register by interrupt service
  452                          * routines.
  453                          * XXX Is this necessary with splimp() enabled?
  454                          */
  455                         outb(iobase + MASK_REG, All_Int);
  456 #endif
  457 
  458                         /*
  459                          * Compute the start and end addresses of this
  460                          * frame in the tx buffer.
  461                          */
  462                         dest = sc->tx_tail;
  463                         next = dest + len;
  464 
  465                         if (next > sc->tx_upper_limit) {
  466                                 if ((sc->tx_upper_limit + 2 - sc->tx_tail) <=
  467                                     XMT_HEADER_LEN) {
  468                                         dest = sc->tx_lower_limit;
  469                                         next = dest + len;
  470                                 } else {
  471                                         next = sc->tx_lower_limit +
  472                                                 next - sc->tx_upper_limit - 2;
  473                                 }
  474                         }
  475 
  476                         /*
  477                          * Build the packet frame in the card's ring buffer.
  478                          */
  479                         DODEBUG(Sent_Pkts, printf("2. dest=%d, next=%d. ", dest, next););
  480 
  481                         outw(iobase + HOST_ADDR_REG, dest);
  482                         outw(iobase + IO_PORT_REG, Transmit_CMD);
  483                         outw(iobase + IO_PORT_REG, 0);
  484                         outw(iobase + IO_PORT_REG, next);
  485                         outw(iobase + IO_PORT_REG, data_len);
  486 
  487                         /*
  488                          * Output the packet data to the card. Ensure all
  489                          * transfers are 16-bit wide, even if individual
  490                          * mbufs have odd length.
  491                          */
  492 
  493                         for (m = opkt, i = 0; m != NULL; m = m->m_next) {
  494                                 DODEBUG(Sent_Pkts, printf("[%d]", m->m_len););
  495                                 if (i) {
  496                                         tmp16[1] = *(mtod(m, caddr_t));
  497                                         outsw(iobase + IO_PORT_REG, tmp16, 1);
  498                                 }
  499                                 outsw(iobase + IO_PORT_REG,
  500                                       mtod(m, caddr_t) + i, (m->m_len - i) / 2);
  501 
  502                                 if ((i = (m->m_len - i) & 1) != 0) {
  503                                         tmp16[0] = *(mtod(m, caddr_t) +
  504                                                    m->m_len - 1);
  505                                 }
  506                         }
  507                         if (i) {
  508                                 outsw(iobase + IO_PORT_REG, tmp16, 1);
  509                         }
  510         
  511                         /*
  512                          * If there were other frames chained, update the
  513                          * chain in the last one.
  514                          */
  515                         if (sc->tx_head != sc->tx_tail) {
  516                                 if (sc->tx_tail != dest) {
  517                                         outw(iobase + HOST_ADDR_REG,
  518                                              sc->tx_last + XMT_Chain_Point);
  519                                         outw(iobase + IO_PORT_REG, dest);
  520                                 }
  521                                 outw(iobase + HOST_ADDR_REG,
  522                                      sc->tx_last + XMT_Byte_Count);
  523                                 i = inw(iobase + IO_PORT_REG);
  524                                 outw(iobase + HOST_ADDR_REG,
  525                                      sc->tx_last + XMT_Byte_Count);
  526                                 outw(iobase + IO_PORT_REG, i | Ch_bit);
  527                         }
  528         
  529                         /*
  530                          * Resume normal operation of the card:
  531                          * - Make a dummy read to flush the DRAM write
  532                          *   pipeline.
  533                          * - Enable receive and transmit interrupts.
  534                          * - Send Transmit or Resume_XMT command, as
  535                          *   appropriate.
  536                          */
  537                         inw(iobase + IO_PORT_REG);
  538 #ifdef EX_PSA_INTR
  539                         outb(iobase + MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
  540 #endif
  541                         if (sc->tx_head == sc->tx_tail) {
  542                                 outw(iobase + XMT_BAR, dest);
  543                                 outb(iobase + CMD_REG, Transmit_CMD);
  544                                 sc->tx_head = dest;
  545                                 DODEBUG(Sent_Pkts, printf("Transmit\n"););
  546                         } else {
  547                                 outb(iobase + CMD_REG, Resume_XMT_List_CMD);
  548                                 DODEBUG(Sent_Pkts, printf("Resume\n"););
  549                         }
  550         
  551                         sc->tx_last = dest;
  552                         sc->tx_tail = next;
  553          
  554                         BPF_MTAP(ifp, opkt);
  555 
  556                         ifp->if_timer = 2;
  557                         ifp->if_opackets++;
  558                         m_freem(opkt);
  559                 } else {
  560                         ifp->if_flags |= IFF_OACTIVE;
  561                         DODEBUG(Status, printf("OACTIVE start\n"););
  562                 }
  563         }
  564 
  565         splx(s);
  566 
  567         DODEBUG(Start_End, printf("ex_start%d: finish\n", unit););
  568 }
  569 
  570 void
  571 ex_stop(struct ex_softc *sc)
  572 {
  573         int iobase = sc->iobase;
  574 
  575         DODEBUG(Start_End, printf("ex_stop%d: start\n", unit););
  576 
  577         /*
  578          * Disable card operation:
  579          * - Disable the interrupt line.
  580          * - Flush transmission and disable reception.
  581          * - Mask and clear all interrupts.
  582          * - Reset the 82595.
  583          */
  584         outb(iobase + CMD_REG, Bank1_Sel);
  585         outb(iobase + REG1, inb(iobase + REG1) & ~TriST_INT);
  586         outb(iobase + CMD_REG, Bank0_Sel);
  587         outb(iobase + CMD_REG, Rcv_Stop);
  588         sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
  589         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. */
  590         outb(iobase + MASK_REG, All_Int);
  591         outb(iobase + STATUS_REG, All_Int);
  592         outb(iobase + CMD_REG, Reset_CMD);
  593         DELAY(200);
  594 
  595         DODEBUG(Start_End, printf("ex_stop%d: finish\n", unit););
  596 
  597         return;
  598 }
  599 
  600 void
  601 ex_intr(void *arg)
  602 {
  603         struct ex_softc *       sc = (struct ex_softc *)arg;
  604         struct ifnet *  ifp = &sc->arpcom.ac_if;
  605         int                     iobase = sc->iobase;
  606         int                     int_status, send_pkts;
  607 
  608         DODEBUG(Start_End, printf("ex_intr%d: start\n", unit););
  609 
  610 #ifdef EXDEBUG
  611         if (++exintr_count != 1)
  612                 printf("WARNING: nested interrupt (%d). Mail the author.\n", exintr_count);
  613 #endif
  614 
  615         send_pkts = 0;
  616         while ((int_status = inb(iobase + STATUS_REG)) & (Tx_Int | Rx_Int)) {
  617                 if (int_status & Rx_Int) {
  618                         outb(iobase + STATUS_REG, Rx_Int);
  619 
  620                         ex_rx_intr(sc);
  621                 } else if (int_status & Tx_Int) {
  622                         outb(iobase + STATUS_REG, Tx_Int);
  623 
  624                         ex_tx_intr(sc);
  625                         send_pkts = 1;
  626                 }
  627         }
  628 
  629         /*
  630          * If any packet has been transmitted, and there are queued packets to
  631          * be sent, attempt to send more packets to the network card.
  632          */
  633 
  634         if (send_pkts && (ifp->if_snd.ifq_head != NULL)) {
  635                 ex_start(ifp);
  636         }
  637 
  638 #ifdef EXDEBUG
  639         exintr_count--;
  640 #endif
  641 
  642         DODEBUG(Start_End, printf("ex_intr%d: finish\n", unit););
  643 
  644         return;
  645 }
  646 
  647 static void
  648 ex_tx_intr(struct ex_softc *sc)
  649 {
  650         struct ifnet *  ifp = &sc->arpcom.ac_if;
  651         int             iobase = sc->iobase;
  652         int             tx_status;
  653 
  654         DODEBUG(Start_End, printf("ex_tx_intr%d: start\n", unit););
  655 
  656         /*
  657          * - Cancel the watchdog.
  658          * For all packets transmitted since last transmit interrupt:
  659          * - Advance chain pointer to next queued packet.
  660          * - Update statistics.
  661          */
  662 
  663         ifp->if_timer = 0;
  664 
  665         while (sc->tx_head != sc->tx_tail) {
  666                 outw(iobase + HOST_ADDR_REG, sc->tx_head);
  667 
  668                 if (! inw(iobase + IO_PORT_REG) & Done_bit)
  669                         break;
  670 
  671                 tx_status = inw(iobase + IO_PORT_REG);
  672                 sc->tx_head = inw(iobase + IO_PORT_REG);
  673 
  674                 if (tx_status & TX_OK_bit) {
  675                         ifp->if_opackets++;
  676                 } else {
  677                         ifp->if_oerrors++;
  678                 }
  679 
  680                 ifp->if_collisions += tx_status & No_Collisions_bits;
  681         }
  682 
  683         /*
  684          * The card should be ready to accept more packets now.
  685          */
  686 
  687         ifp->if_flags &= ~IFF_OACTIVE;
  688 
  689         DODEBUG(Status, printf("OIDLE tx_intr\n"););
  690         DODEBUG(Start_End, printf("ex_tx_intr%d: finish\n", unit););
  691 
  692         return;
  693 }
  694 
  695 static void
  696 ex_rx_intr(struct ex_softc *sc)
  697 {
  698         struct ifnet *          ifp = &sc->arpcom.ac_if;
  699         int                     iobase = sc->iobase;
  700         int                     rx_status;
  701         int                     pkt_len;
  702         int                     QQQ;
  703         struct mbuf *           m;
  704         struct mbuf *           ipkt;
  705         struct ether_header *   eh;
  706 
  707         DODEBUG(Start_End, printf("ex_rx_intr%d: start\n", unit););
  708 
  709         /*
  710          * For all packets received since last receive interrupt:
  711          * - If packet ok, read it into a new mbuf and queue it to interface,
  712          *   updating statistics.
  713          * - If packet bad, just discard it, and update statistics.
  714          * Finally, advance receive stop limit in card's memory to new location.
  715          */
  716 
  717         outw(iobase + HOST_ADDR_REG, sc->rx_head);
  718 
  719         while (inw(iobase + IO_PORT_REG) == RCV_Done) {
  720 
  721                 rx_status = inw(iobase + IO_PORT_REG);
  722                 sc->rx_head = inw(iobase + IO_PORT_REG);
  723                 QQQ = pkt_len = inw(iobase + IO_PORT_REG);
  724 
  725                 if (rx_status & RCV_OK_bit) {
  726                         MGETHDR(m, M_DONTWAIT, MT_DATA);
  727                         ipkt = m;
  728                         if (ipkt == NULL) {
  729                                 ifp->if_iqdrops++;
  730                         } else {
  731                                 ipkt->m_pkthdr.rcvif = ifp;
  732                                 ipkt->m_pkthdr.len = pkt_len;
  733                                 ipkt->m_len = MHLEN;
  734 
  735                                 while (pkt_len > 0) {
  736                                         if (pkt_len > MINCLSIZE) {
  737                                                 MCLGET(m, M_DONTWAIT);
  738                                                 if (m->m_flags & M_EXT) {
  739                                                         m->m_len = MCLBYTES;
  740                                                 } else {
  741                                                         m_freem(ipkt);
  742                                                         ifp->if_iqdrops++;
  743                                                         goto rx_another;
  744                                                 }
  745                                         }
  746                                         m->m_len = min(m->m_len, pkt_len);
  747 
  748           /*
  749            * NOTE: I'm assuming that all mbufs allocated are of even length,
  750            * except for the last one in an odd-length packet.
  751            */
  752 
  753                                         insw(iobase + IO_PORT_REG,
  754                                              mtod(m, caddr_t), m->m_len / 2);
  755 
  756                                         if (m->m_len & 1) {
  757                                                 *(mtod(m, caddr_t) + m->m_len - 1) = inb(iobase + IO_PORT_REG);
  758                                         }
  759                                         pkt_len -= m->m_len;
  760 
  761                                         if (pkt_len > 0) {
  762                                                 MGET(m->m_next, M_DONTWAIT, MT_DATA);
  763                                                 if (m->m_next == NULL) {
  764                                                         m_freem(ipkt);
  765                                                         ifp->if_iqdrops++;
  766                                                         goto rx_another;
  767                                                 }
  768                                                 m = m->m_next;
  769                                                 m->m_len = MLEN;
  770                                         }
  771                                 }
  772                                 eh = mtod(ipkt, struct ether_header *);
  773 #ifdef EXDEBUG
  774         if (debug_mask & Rcvd_Pkts) {
  775                 if ((eh->ether_dhost[5] != 0xff) || (eh->ether_dhost[0] != 0xff)) {
  776                         printf("Receive packet with %d data bytes: %6D -> ", QQQ, eh->ether_shost, ":");
  777                         printf("%6D\n", eh->ether_dhost, ":");
  778                 } /* QQQ */
  779         }
  780 #endif
  781                                 (*ifp->if_input)(ifp, ipkt);
  782                                 ifp->if_ipackets++;
  783                         }
  784                 } else {
  785                         ifp->if_ierrors++;
  786                 }
  787                 outw(iobase + HOST_ADDR_REG, sc->rx_head);
  788 rx_another: ;
  789         }
  790 
  791         if (sc->rx_head < sc->rx_lower_limit + 2)
  792                 outw(iobase + RCV_STOP_REG, sc->rx_upper_limit);
  793         else
  794                 outw(iobase + RCV_STOP_REG, sc->rx_head - 2);
  795 
  796         DODEBUG(Start_End, printf("ex_rx_intr%d: finish\n", unit););
  797 
  798         return;
  799 }
  800 
  801 
  802 static int
  803 ex_ioctl(register struct ifnet *ifp, u_long cmd, caddr_t data)
  804 {
  805         struct ex_softc *       sc = ifp->if_softc;
  806         struct ifreq *          ifr = (struct ifreq *)data;
  807         int                     s;
  808         int                     error = 0;
  809 
  810         DODEBUG(Start_End, printf("ex_ioctl%d: start ", ifp->if_unit););
  811 
  812         s = splimp();
  813 
  814         switch(cmd) {
  815                 case SIOCSIFADDR:
  816                 case SIOCGIFADDR:
  817                 case SIOCSIFMTU:
  818                         error = ether_ioctl(ifp, cmd, data);
  819                         break;
  820 
  821                 case SIOCSIFFLAGS:
  822                         DODEBUG(Start_End, printf("SIOCSIFFLAGS"););
  823                         if ((ifp->if_flags & IFF_UP) == 0 &&
  824                             (ifp->if_flags & IFF_RUNNING)) {
  825 
  826                                 ifp->if_flags &= ~IFF_RUNNING;
  827                                 ex_stop(sc);
  828                         } else {
  829                                 ex_init(sc);
  830                         }
  831                         break;
  832 #ifdef NODEF
  833                 case SIOCGHWADDR:
  834                         DODEBUG(Start_End, printf("SIOCGHWADDR"););
  835                         bcopy((caddr_t)sc->sc_addr, (caddr_t)&ifr->ifr_data,
  836                               sizeof(sc->sc_addr));
  837                         break;
  838 #endif
  839                 case SIOCADDMULTI:
  840                 case SIOCDELMULTI:
  841                         ex_init(sc);
  842                         error = 0;
  843                         break;
  844                 case SIOCSIFMEDIA:
  845                 case SIOCGIFMEDIA:
  846                         error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, cmd);
  847                         break;
  848                 default:
  849                         DODEBUG(Start_End, printf("unknown"););
  850                         error = EINVAL;
  851         }
  852 
  853         splx(s);
  854 
  855         DODEBUG(Start_End, printf("\nex_ioctl%d: finish\n", ifp->if_unit););
  856 
  857         return(error);
  858 }
  859 
  860 static void
  861 ex_setmulti(struct ex_softc *sc)
  862 {
  863         struct ifnet *ifp;
  864         struct ifmultiaddr *maddr;
  865         u_int16_t *addr;
  866         int iobase = sc->iobase;
  867         int count;
  868         int timeout, status;
  869         
  870         ifp = &sc->arpcom.ac_if;
  871 
  872         count = 0;
  873         TAILQ_FOREACH(maddr, &ifp->if_multiaddrs, ifma_link) {
  874                 if (maddr->ifma_addr->sa_family != AF_LINK)
  875                         continue;
  876                 count++;
  877         }
  878 
  879         if ((ifp->if_flags & IFF_PROMISC) || (ifp->if_flags & IFF_ALLMULTI)
  880                         || count > 63) {
  881                 /* Interface is in promiscuous mode or there are too many
  882                  * multicast addresses for the card to handle */
  883                 outb(iobase + CMD_REG, Bank2_Sel);
  884                 outb(iobase + REG2, inb(iobase + REG2) | Promisc_Mode);
  885                 outb(iobase + REG3, inb(iobase + REG3));
  886                 outb(iobase + CMD_REG, Bank0_Sel);
  887         }
  888         else if ((ifp->if_flags & IFF_MULTICAST) && (count > 0)) {
  889                 /* Program multicast addresses plus our MAC address
  890                  * into the filter */
  891                 outb(iobase + CMD_REG, Bank2_Sel);
  892                 outb(iobase + REG2, inb(iobase + REG2) | Multi_IA);
  893                 outb(iobase + REG3, inb(iobase + REG3));
  894                 outb(iobase + CMD_REG, Bank0_Sel);
  895 
  896                 /* Borrow space from TX buffer; this should be safe
  897                  * as this is only called from ex_init */
  898                 
  899                 outw(iobase + HOST_ADDR_REG, sc->tx_lower_limit);
  900                 outw(iobase + IO_PORT_REG, MC_Setup_CMD);
  901                 outw(iobase + IO_PORT_REG, 0);
  902                 outw(iobase + IO_PORT_REG, 0);
  903                 outw(iobase + IO_PORT_REG, (count + 1) * 6);
  904                 
  905                 TAILQ_FOREACH(maddr, &ifp->if_multiaddrs, ifma_link) {
  906                         if (maddr->ifma_addr->sa_family != AF_LINK)
  907                                 continue;
  908 
  909                         addr = (u_int16_t*)LLADDR((struct sockaddr_dl *)
  910                                         maddr->ifma_addr);
  911                         outw(iobase + IO_PORT_REG, *addr++);
  912                         outw(iobase + IO_PORT_REG, *addr++);
  913                         outw(iobase + IO_PORT_REG, *addr++);
  914                 }
  915 
  916                 /* Program our MAC address as well */
  917                 /* XXX: Is this necessary?  The Linux driver does this
  918                  * but the NetBSD driver does not */
  919                 addr = (u_int16_t*)(&sc->arpcom.ac_enaddr);
  920                 outw(iobase + IO_PORT_REG, *addr++);
  921                 outw(iobase + IO_PORT_REG, *addr++);
  922                 outw(iobase + IO_PORT_REG, *addr++);
  923 
  924                 inw(iobase + IO_PORT_REG);
  925                 outw(iobase + XMT_BAR, sc->tx_lower_limit);
  926                 outb(iobase + CMD_REG, MC_Setup_CMD);
  927 
  928                 sc->tx_head = sc->tx_lower_limit;
  929                 sc->tx_tail = sc->tx_head + XMT_HEADER_LEN + (count + 1) * 6;
  930 
  931                 for (timeout=0; timeout<100; timeout++) {
  932                         DELAY(2);
  933                         if ((inb(iobase + STATUS_REG) & Exec_Int) == 0)
  934                                 continue;
  935 
  936                         status = inb(iobase + CMD_REG);
  937                         outb(iobase + STATUS_REG, Exec_Int);
  938                         break;
  939                 }
  940 
  941                 sc->tx_head = sc->tx_tail;
  942         }
  943         else
  944         {
  945                 /* No multicast or promiscuous mode */
  946                 outb(iobase + CMD_REG, Bank2_Sel);
  947                 outb(iobase + REG2, inb(iobase + REG2) & 0xDE);
  948                         /* ~(Multi_IA | Promisc_Mode) */
  949                 outb(iobase + REG3, inb(iobase + REG3));
  950                 outb(iobase + CMD_REG, Bank0_Sel);
  951         }
  952 }
  953 
  954 static void
  955 ex_reset(struct ex_softc *sc)
  956 {
  957         int s;
  958 
  959         DODEBUG(Start_End, printf("ex_reset%d: start\n", unit););
  960   
  961         s = splimp();
  962 
  963         ex_stop(sc);
  964         ex_init(sc);
  965 
  966         splx(s);
  967 
  968         DODEBUG(Start_End, printf("ex_reset%d: finish\n", unit););
  969 
  970         return;
  971 }
  972 
  973 static void
  974 ex_watchdog(struct ifnet *ifp)
  975 {
  976         struct ex_softc *       sc = ifp->if_softc;
  977 
  978         DODEBUG(Start_End, printf("ex_watchdog%d: start\n", ifp->if_unit););
  979 
  980         ifp->if_flags &= ~IFF_OACTIVE;
  981 
  982         DODEBUG(Status, printf("OIDLE watchdog\n"););
  983 
  984         ifp->if_oerrors++;
  985         ex_reset(sc);
  986         ex_start(ifp);
  987 
  988         DODEBUG(Start_End, printf("ex_watchdog%d: finish\n", ifp->if_unit););
  989 
  990         return;
  991 }
  992 
  993 static int
  994 ex_get_media (u_int32_t iobase)
  995 {
  996         int     current;
  997         int     media;
  998 
  999         media = eeprom_read(iobase, EE_W5);
 1000 
 1001         outb(iobase + CMD_REG, Bank2_Sel);
 1002         current = inb(iobase + REG3);
 1003         outb(iobase + CMD_REG, Bank0_Sel);
 1004 
 1005         if ((current & TPE_bit) && (media & EE_W5_PORT_TPE))
 1006                 return(IFM_ETHER|IFM_10_T);
 1007         if ((current & BNC_bit) && (media & EE_W5_PORT_BNC))
 1008                 return(IFM_ETHER|IFM_10_2);
 1009 
 1010         if (media & EE_W5_PORT_AUI)
 1011                 return (IFM_ETHER|IFM_10_5);
 1012 
 1013         return (IFM_ETHER|IFM_AUTO);
 1014 }
 1015 
 1016 static int
 1017 ex_ifmedia_upd (ifp)
 1018         struct ifnet *          ifp;
 1019 {
 1020         struct ex_softc *       sc = ifp->if_softc;
 1021 
 1022         if (IFM_TYPE(sc->ifmedia.ifm_media) != IFM_ETHER)
 1023                 return EINVAL;
 1024 
 1025         return (0);
 1026 }
 1027 
 1028 static void
 1029 ex_ifmedia_sts(ifp, ifmr)
 1030         struct ifnet *          ifp;
 1031         struct ifmediareq *     ifmr;
 1032 {
 1033         struct ex_softc *       sc = ifp->if_softc;
 1034 
 1035         ifmr->ifm_active = ex_get_media(sc->iobase);
 1036         ifmr->ifm_status = IFM_AVALID | IFM_ACTIVE;
 1037 
 1038         return;
 1039 }
 1040 
 1041 u_short
 1042 eeprom_read(u_int32_t iobase, int location)
 1043 {
 1044         int i;
 1045         u_short data = 0;
 1046         int ee_addr;
 1047         int read_cmd = location | EE_READ_CMD;
 1048         short ctrl_val = EECS;
 1049 
 1050         ee_addr = iobase + EEPROM_REG;
 1051         outb(iobase + CMD_REG, Bank2_Sel);
 1052         outb(ee_addr, EECS);
 1053         for (i = 8; i >= 0; i--) {
 1054                 short outval = (read_cmd & (1 << i)) ? ctrl_val | EEDI : ctrl_val;
 1055                 outb(ee_addr, outval);
 1056                 outb(ee_addr, outval | EESK);
 1057                 DELAY(3);
 1058                 outb(ee_addr, outval);
 1059                 DELAY(2);
 1060         }
 1061         outb(ee_addr, ctrl_val);
 1062 
 1063         for (i = 16; i > 0; i--) {
 1064                 outb(ee_addr, ctrl_val | EESK);
 1065                 DELAY(3);
 1066                 data = (data << 1) | ((inb(ee_addr) & EEDO) ? 1 : 0);
 1067                 outb(ee_addr, ctrl_val);
 1068                 DELAY(2);
 1069         }
 1070 
 1071         ctrl_val &= ~EECS;
 1072         outb(ee_addr, ctrl_val | EESK);
 1073         DELAY(3);
 1074         outb(ee_addr, ctrl_val);
 1075         DELAY(2);
 1076         outb(iobase + CMD_REG, Bank0_Sel);
 1077         return(data);
 1078 }

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