The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: 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  *
   28  * MAINTAINER: Matthew N. Dodd <winter@jurai.net>
   29  *                             <mdodd@FreeBSD.org>
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: releng/11.2/sys/dev/ex/if_ex.c 331722 2018-03-29 02:50:57Z eadler $");
   34 
   35 /*
   36  * Intel EtherExpress Pro/10, Pro/10+ Ethernet driver
   37  *
   38  * Revision history:
   39  *
   40  * dd-mmm-yyyy: Multicast support ported from NetBSD's if_iy driver.
   41  * 30-Oct-1996: first beta version. Inet and BPF supported, but no multicast.
   42  */
   43 
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/kernel.h>
   47 #include <sys/sockio.h>
   48 #include <sys/mbuf.h>
   49 #include <sys/socket.h>
   50 
   51 #include <sys/module.h>
   52 #include <sys/bus.h>
   53 
   54 #include <machine/bus.h>
   55 #include <machine/resource.h>
   56 #include <sys/rman.h>
   57 
   58 #include <net/if.h>
   59 #include <net/if_var.h>
   60 #include <net/if_arp.h>
   61 #include <net/if_dl.h>
   62 #include <net/if_media.h> 
   63 #include <net/if_types.h> 
   64 #include <net/ethernet.h>
   65 #include <net/bpf.h>
   66 
   67 #include <netinet/in.h>
   68 #include <netinet/if_ether.h>
   69 
   70 
   71 #include <isa/isavar.h>
   72 #include <isa/pnpvar.h>
   73 
   74 #include <dev/ex/if_exreg.h>
   75 #include <dev/ex/if_exvar.h>
   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 # define DODEBUG(level, action) if (level & debug_mask) action
   84 #else
   85 # define DODEBUG(level, action)
   86 #endif
   87 
   88 devclass_t ex_devclass;
   89 
   90 char irq2eemap[] =
   91         { -1, -1, 0, 1, -1, 2, -1, -1, -1, 0, 3, 4, -1, -1, -1, -1 };
   92 u_char ee2irqmap[] =
   93         { 9, 3, 5, 10, 11, 0, 0, 0 };
   94                 
   95 char plus_irq2eemap[] =
   96         { -1, -1, -1, 0, 1, 2, -1, 3, -1, 4, 5, 6, 7, -1, -1, -1 };
   97 u_char plus_ee2irqmap[] =
   98         { 3, 4, 5, 7, 9, 10, 11, 12 };
   99 
  100 /* Network Interface Functions */
  101 static void     ex_init(void *);
  102 static void     ex_init_locked(struct ex_softc *);
  103 static void     ex_start(struct ifnet *);
  104 static void     ex_start_locked(struct ifnet *);
  105 static int      ex_ioctl(struct ifnet *, u_long, caddr_t);
  106 static void     ex_watchdog(void *);
  107 
  108 /* ifmedia Functions    */
  109 static int      ex_ifmedia_upd(struct ifnet *);
  110 static void     ex_ifmedia_sts(struct ifnet *, struct ifmediareq *);
  111 
  112 static int      ex_get_media(struct ex_softc *);
  113 
  114 static void     ex_reset(struct ex_softc *);
  115 static void     ex_setmulti(struct ex_softc *);
  116 
  117 static void     ex_tx_intr(struct ex_softc *);
  118 static void     ex_rx_intr(struct ex_softc *);
  119 
  120 void
  121 ex_get_address(struct ex_softc *sc, u_char *enaddr)
  122 {
  123         uint16_t        eaddr_tmp;
  124 
  125         eaddr_tmp = ex_eeprom_read(sc, EE_Eth_Addr_Lo);
  126         enaddr[5] = eaddr_tmp & 0xff;
  127         enaddr[4] = eaddr_tmp >> 8;
  128         eaddr_tmp = ex_eeprom_read(sc, EE_Eth_Addr_Mid);
  129         enaddr[3] = eaddr_tmp & 0xff;
  130         enaddr[2] = eaddr_tmp >> 8;
  131         eaddr_tmp = ex_eeprom_read(sc, EE_Eth_Addr_Hi);
  132         enaddr[1] = eaddr_tmp & 0xff;
  133         enaddr[0] = eaddr_tmp >> 8;
  134         
  135         return;
  136 }
  137 
  138 int
  139 ex_card_type(u_char *enaddr)
  140 {
  141         if ((enaddr[0] == 0x00) && (enaddr[1] == 0xA0) && (enaddr[2] == 0xC9))
  142                 return (CARD_TYPE_EX_10_PLUS);
  143 
  144         return (CARD_TYPE_EX_10);
  145 }
  146 
  147 /*
  148  * Caller is responsible for eventually calling
  149  * ex_release_resources() on failure.
  150  */
  151 int
  152 ex_alloc_resources(device_t dev)
  153 {
  154         struct ex_softc *       sc = device_get_softc(dev);
  155         int                     error = 0;
  156 
  157         sc->ioport = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
  158                                             &sc->ioport_rid, RF_ACTIVE);
  159         if (!sc->ioport) {
  160                 device_printf(dev, "No I/O space?!\n");
  161                 error = ENOMEM;
  162                 goto bad;
  163         }
  164 
  165         sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
  166                                         RF_ACTIVE);
  167 
  168         if (!sc->irq) {
  169                 device_printf(dev, "No IRQ?!\n");
  170                 error = ENOMEM;
  171                 goto bad;
  172         }
  173 
  174 bad:
  175         return (error);
  176 }
  177 
  178 void
  179 ex_release_resources(device_t dev)
  180 {
  181         struct ex_softc *       sc = device_get_softc(dev);
  182 
  183         if (sc->ih) {
  184                 bus_teardown_intr(dev, sc->irq, sc->ih);
  185                 sc->ih = NULL;
  186         }
  187 
  188         if (sc->ioport) {
  189                 bus_release_resource(dev, SYS_RES_IOPORT,
  190                                         sc->ioport_rid, sc->ioport);
  191                 sc->ioport = NULL;
  192         }
  193 
  194         if (sc->irq) {
  195                 bus_release_resource(dev, SYS_RES_IRQ,
  196                                         sc->irq_rid, sc->irq);
  197                 sc->irq = NULL;
  198         }
  199 
  200         if (sc->ifp)
  201                 if_free(sc->ifp);
  202 
  203         return;
  204 }
  205 
  206 int
  207 ex_attach(device_t dev)
  208 {
  209         struct ex_softc *       sc = device_get_softc(dev);
  210         struct ifnet *          ifp;
  211         struct ifmedia *        ifm;
  212         int                     error;
  213         uint16_t                temp;
  214 
  215         ifp = sc->ifp = if_alloc(IFT_ETHER);
  216         if (ifp == NULL) {
  217                 device_printf(dev, "can not if_alloc()\n");
  218                 return (ENOSPC);
  219         }
  220         /* work out which set of irq <-> internal tables to use */
  221         if (ex_card_type(sc->enaddr) == CARD_TYPE_EX_10_PLUS) {
  222                 sc->irq2ee = plus_irq2eemap;
  223                 sc->ee2irq = plus_ee2irqmap;
  224         } else {
  225                 sc->irq2ee = irq2eemap;
  226                 sc->ee2irq = ee2irqmap;
  227         }
  228 
  229         sc->mem_size = CARD_RAM_SIZE;   /* XXX This should be read from the card itself. */
  230 
  231         /*
  232          * Initialize the ifnet structure.
  233          */
  234         ifp->if_softc = sc;
  235         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
  236         ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
  237         ifp->if_start = ex_start;
  238         ifp->if_ioctl = ex_ioctl;
  239         ifp->if_init = ex_init;
  240         IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
  241 
  242         ifmedia_init(&sc->ifmedia, 0, ex_ifmedia_upd, ex_ifmedia_sts);
  243         mtx_init(&sc->lock, device_get_nameunit(dev), MTX_NETWORK_LOCK,
  244             MTX_DEF);
  245         callout_init_mtx(&sc->timer, &sc->lock, 0);
  246 
  247         temp = ex_eeprom_read(sc, EE_W5);
  248         if (temp & EE_W5_PORT_TPE)
  249                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL);
  250         if (temp & EE_W5_PORT_BNC)
  251                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_2, 0, NULL);
  252         if (temp & EE_W5_PORT_AUI)
  253                 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_5, 0, NULL);
  254 
  255         ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_AUTO, 0, NULL);
  256         ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL);
  257         ifmedia_set(&sc->ifmedia, ex_get_media(sc));
  258 
  259         ifm = &sc->ifmedia;
  260         ifm->ifm_media = ifm->ifm_cur->ifm_media;       
  261         ex_ifmedia_upd(ifp);
  262 
  263         /*
  264          * Attach the interface.
  265          */
  266         ether_ifattach(ifp, sc->enaddr);
  267 
  268         error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE,
  269                                 NULL, ex_intr, (void *)sc, &sc->ih);
  270         if (error) {
  271                 device_printf(dev, "bus_setup_intr() failed!\n");
  272                 ether_ifdetach(ifp);
  273                 mtx_destroy(&sc->lock);
  274                 return (error);
  275         }
  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->ifp;
  288 
  289         EX_LOCK(sc);
  290         ex_stop(sc);
  291         EX_UNLOCK(sc);
  292 
  293         ether_ifdetach(ifp);
  294         callout_drain(&sc->timer);
  295 
  296         ex_release_resources(dev);
  297         mtx_destroy(&sc->lock);
  298 
  299         return (0);
  300 }
  301 
  302 static void
  303 ex_init(void *xsc)
  304 {
  305         struct ex_softc *       sc = (struct ex_softc *) xsc;
  306 
  307         EX_LOCK(sc);
  308         ex_init_locked(sc);
  309         EX_UNLOCK(sc);
  310 }
  311 
  312 static void
  313 ex_init_locked(struct ex_softc *sc)
  314 {
  315         struct ifnet *          ifp = sc->ifp;
  316         int                     i;
  317         unsigned short          temp_reg;
  318 
  319         DODEBUG(Start_End, printf("%s: ex_init: start\n", ifp->if_xname););
  320 
  321         sc->tx_timeout = 0;
  322 
  323         /*
  324          * Load the ethernet address into the card.
  325          */
  326         CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
  327         temp_reg = CSR_READ_1(sc, EEPROM_REG);
  328         if (temp_reg & Trnoff_Enable)
  329                 CSR_WRITE_1(sc, EEPROM_REG, temp_reg & ~Trnoff_Enable);
  330         for (i = 0; i < ETHER_ADDR_LEN; i++)
  331                 CSR_WRITE_1(sc, I_ADDR_REG0 + i, IF_LLADDR(sc->ifp)[i]);
  332 
  333         /*
  334          * - Setup transmit chaining and discard bad received frames.
  335          * - Match broadcast.
  336          * - Clear test mode.
  337          * - Set receiving mode.
  338          */
  339         CSR_WRITE_1(sc, REG1, CSR_READ_1(sc, REG1) | Tx_Chn_Int_Md | Tx_Chn_ErStp | Disc_Bad_Fr);
  340         CSR_WRITE_1(sc, REG2, CSR_READ_1(sc, REG2) | No_SA_Ins | RX_CRC_InMem);
  341         CSR_WRITE_1(sc, REG3, CSR_READ_1(sc, REG3) & 0x3f /* XXX constants. */ );
  342         /*
  343          * - Set IRQ number, if this part has it.  ISA devices have this,
  344          * while PC Card devices don't seem to.  Either way, we have to
  345          * switch to Bank1 as the rest of this code relies on that.
  346          */
  347         CSR_WRITE_1(sc, CMD_REG, Bank1_Sel);
  348         if (sc->flags & HAS_INT_NO_REG)
  349                 CSR_WRITE_1(sc, INT_NO_REG,
  350                     (CSR_READ_1(sc, INT_NO_REG) & 0xf8) |
  351                     sc->irq2ee[sc->irq_no]);
  352 
  353         /*
  354          * Divide the available memory in the card into rcv and xmt buffers.
  355          * By default, I use the first 3/4 of the memory for the rcv buffer,
  356          * and the remaining 1/4 of the memory for the xmt buffer.
  357          */
  358         sc->rx_mem_size = sc->mem_size * 3 / 4;
  359         sc->tx_mem_size = sc->mem_size - sc->rx_mem_size;
  360         sc->rx_lower_limit = 0x0000;
  361         sc->rx_upper_limit = sc->rx_mem_size - 2;
  362         sc->tx_lower_limit = sc->rx_mem_size;
  363         sc->tx_upper_limit = sc->mem_size - 2;
  364         CSR_WRITE_1(sc, RCV_LOWER_LIMIT_REG, sc->rx_lower_limit >> 8);
  365         CSR_WRITE_1(sc, RCV_UPPER_LIMIT_REG, sc->rx_upper_limit >> 8);
  366         CSR_WRITE_1(sc, XMT_LOWER_LIMIT_REG, sc->tx_lower_limit >> 8);
  367         CSR_WRITE_1(sc, XMT_UPPER_LIMIT_REG, sc->tx_upper_limit >> 8);
  368         
  369         /*
  370          * Enable receive and transmit interrupts, and clear any pending int.
  371          */
  372         CSR_WRITE_1(sc, REG1, CSR_READ_1(sc, REG1) | TriST_INT);
  373         CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
  374         CSR_WRITE_1(sc, MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
  375         CSR_WRITE_1(sc, STATUS_REG, All_Int);
  376 
  377         /*
  378          * Initialize receive and transmit ring buffers.
  379          */
  380         CSR_WRITE_2(sc, RCV_BAR, sc->rx_lower_limit);
  381         sc->rx_head = sc->rx_lower_limit;
  382         CSR_WRITE_2(sc, RCV_STOP_REG, sc->rx_upper_limit | 0xfe);
  383         CSR_WRITE_2(sc, XMT_BAR, sc->tx_lower_limit);
  384         sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
  385 
  386         ifp->if_drv_flags |= IFF_DRV_RUNNING;
  387         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
  388         DODEBUG(Status, printf("OIDLE init\n"););
  389         callout_reset(&sc->timer, hz, ex_watchdog, sc);
  390         
  391         ex_setmulti(sc);
  392         
  393         /*
  394          * Final reset of the board, and enable operation.
  395          */
  396         CSR_WRITE_1(sc, CMD_REG, Sel_Reset_CMD);
  397         DELAY(2);
  398         CSR_WRITE_1(sc, CMD_REG, Rcv_Enable_CMD);
  399 
  400         ex_start_locked(ifp);
  401 
  402         DODEBUG(Start_End, printf("%s: ex_init: finish\n", ifp->if_xname););
  403 }
  404 
  405 static void
  406 ex_start(struct ifnet *ifp)
  407 {
  408         struct ex_softc *       sc = ifp->if_softc;
  409 
  410         EX_LOCK(sc);
  411         ex_start_locked(ifp);
  412         EX_UNLOCK(sc);
  413 }
  414 
  415 static void
  416 ex_start_locked(struct ifnet *ifp)
  417 {
  418         struct ex_softc *       sc = ifp->if_softc;
  419         int                     i, len, data_len, avail, dest, next;
  420         unsigned char           tmp16[2];
  421         struct mbuf *           opkt;
  422         struct mbuf *           m;
  423 
  424         DODEBUG(Start_End, printf("ex_start%d: start\n", unit););
  425 
  426         /*
  427          * Main loop: send outgoing packets to network card until there are no
  428          * more packets left, or the card cannot accept any more yet.
  429          */
  430         while (((opkt = ifp->if_snd.ifq_head) != NULL) &&
  431                !(ifp->if_drv_flags & IFF_DRV_OACTIVE)) {
  432 
  433                 /*
  434                  * Ensure there is enough free transmit buffer space for
  435                  * this packet, including its header. Note: the header
  436                  * cannot wrap around the end of the transmit buffer and
  437                  * must be kept together, so we allow space for twice the
  438                  * length of the header, just in case.
  439                  */
  440 
  441                 for (len = 0, m = opkt; m != NULL; m = m->m_next) {
  442                         len += m->m_len;
  443                 }
  444 
  445                 data_len = len;
  446 
  447                 DODEBUG(Sent_Pkts, printf("1. Sending packet with %d data bytes. ", data_len););
  448 
  449                 if (len & 1) {
  450                         len += XMT_HEADER_LEN + 1;
  451                 } else {
  452                         len += XMT_HEADER_LEN;
  453                 }
  454 
  455                 if ((i = sc->tx_tail - sc->tx_head) >= 0) {
  456                         avail = sc->tx_mem_size - i;
  457                 } else {
  458                         avail = -i;
  459                 }
  460 
  461                 DODEBUG(Sent_Pkts, printf("i=%d, avail=%d\n", i, avail););
  462 
  463                 if (avail >= len + XMT_HEADER_LEN) {
  464                         IF_DEQUEUE(&ifp->if_snd, opkt);
  465 
  466 #ifdef EX_PSA_INTR      
  467                         /*
  468                          * Disable rx and tx interrupts, to avoid corruption
  469                          * of the host address register by interrupt service
  470                          * routines.
  471                          * XXX Is this necessary with splimp() enabled?
  472                          */
  473                         CSR_WRITE_1(sc, MASK_REG, All_Int);
  474 #endif
  475 
  476                         /*
  477                          * Compute the start and end addresses of this
  478                          * frame in the tx buffer.
  479                          */
  480                         dest = sc->tx_tail;
  481                         next = dest + len;
  482 
  483                         if (next > sc->tx_upper_limit) {
  484                                 if ((sc->tx_upper_limit + 2 - sc->tx_tail) <=
  485                                     XMT_HEADER_LEN) {
  486                                         dest = sc->tx_lower_limit;
  487                                         next = dest + len;
  488                                 } else {
  489                                         next = sc->tx_lower_limit +
  490                                                 next - sc->tx_upper_limit - 2;
  491                                 }
  492                         }
  493 
  494                         /*
  495                          * Build the packet frame in the card's ring buffer.
  496                          */
  497                         DODEBUG(Sent_Pkts, printf("2. dest=%d, next=%d. ", dest, next););
  498 
  499                         CSR_WRITE_2(sc, HOST_ADDR_REG, dest);
  500                         CSR_WRITE_2(sc, IO_PORT_REG, Transmit_CMD);
  501                         CSR_WRITE_2(sc, IO_PORT_REG, 0);
  502                         CSR_WRITE_2(sc, IO_PORT_REG, next);
  503                         CSR_WRITE_2(sc, IO_PORT_REG, data_len);
  504 
  505                         /*
  506                          * Output the packet data to the card. Ensure all
  507                          * transfers are 16-bit wide, even if individual
  508                          * mbufs have odd length.
  509                          */
  510                         for (m = opkt, i = 0; m != NULL; m = m->m_next) {
  511                                 DODEBUG(Sent_Pkts, printf("[%d]", m->m_len););
  512                                 if (i) {
  513                                         tmp16[1] = *(mtod(m, caddr_t));
  514                                         CSR_WRITE_MULTI_2(sc, IO_PORT_REG,
  515                                             (uint16_t *) tmp16, 1);
  516                                 }
  517                                 CSR_WRITE_MULTI_2(sc, IO_PORT_REG,
  518                                     (uint16_t *) (mtod(m, caddr_t) + i),
  519                                     (m->m_len - i) / 2);
  520                                 if ((i = (m->m_len - i) & 1) != 0) {
  521                                         tmp16[0] = *(mtod(m, caddr_t) +
  522                                                    m->m_len - 1);
  523                                 }
  524                         }
  525                         if (i)
  526                                 CSR_WRITE_MULTI_2(sc, IO_PORT_REG, 
  527                                     (uint16_t *) tmp16, 1);
  528                         /*
  529                          * If there were other frames chained, update the
  530                          * chain in the last one.
  531                          */
  532                         if (sc->tx_head != sc->tx_tail) {
  533                                 if (sc->tx_tail != dest) {
  534                                         CSR_WRITE_2(sc, HOST_ADDR_REG,
  535                                              sc->tx_last + XMT_Chain_Point);
  536                                         CSR_WRITE_2(sc, IO_PORT_REG, dest);
  537                                 }
  538                                 CSR_WRITE_2(sc, HOST_ADDR_REG,
  539                                      sc->tx_last + XMT_Byte_Count);
  540                                 i = CSR_READ_2(sc, IO_PORT_REG);
  541                                 CSR_WRITE_2(sc, HOST_ADDR_REG,
  542                                      sc->tx_last + XMT_Byte_Count);
  543                                 CSR_WRITE_2(sc, IO_PORT_REG, i | Ch_bit);
  544                         }
  545         
  546                         /*
  547                          * Resume normal operation of the card:
  548                          * - Make a dummy read to flush the DRAM write
  549                          *   pipeline.
  550                          * - Enable receive and transmit interrupts.
  551                          * - Send Transmit or Resume_XMT command, as
  552                          *   appropriate.
  553                          */
  554                         CSR_READ_2(sc, IO_PORT_REG);
  555 #ifdef EX_PSA_INTR
  556                         CSR_WRITE_1(sc, MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
  557 #endif
  558                         if (sc->tx_head == sc->tx_tail) {
  559                                 CSR_WRITE_2(sc, XMT_BAR, dest);
  560                                 CSR_WRITE_1(sc, CMD_REG, Transmit_CMD);
  561                                 sc->tx_head = dest;
  562                                 DODEBUG(Sent_Pkts, printf("Transmit\n"););
  563                         } else {
  564                                 CSR_WRITE_1(sc, CMD_REG, Resume_XMT_List_CMD);
  565                                 DODEBUG(Sent_Pkts, printf("Resume\n"););
  566                         }
  567         
  568                         sc->tx_last = dest;
  569                         sc->tx_tail = next;
  570          
  571                         BPF_MTAP(ifp, opkt);
  572 
  573                         sc->tx_timeout = 2;
  574                         if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
  575                         m_freem(opkt);
  576                 } else {
  577                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
  578                         DODEBUG(Status, printf("OACTIVE start\n"););
  579                 }
  580         }
  581 
  582         DODEBUG(Start_End, printf("ex_start%d: finish\n", unit););
  583 }
  584 
  585 void
  586 ex_stop(struct ex_softc *sc)
  587 {
  588         
  589         DODEBUG(Start_End, printf("ex_stop%d: start\n", unit););
  590 
  591         EX_ASSERT_LOCKED(sc);
  592         /*
  593          * Disable card operation:
  594          * - Disable the interrupt line.
  595          * - Flush transmission and disable reception.
  596          * - Mask and clear all interrupts.
  597          * - Reset the 82595.
  598          */
  599         CSR_WRITE_1(sc, CMD_REG, Bank1_Sel);
  600         CSR_WRITE_1(sc, REG1, CSR_READ_1(sc, REG1) & ~TriST_INT);
  601         CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
  602         CSR_WRITE_1(sc, CMD_REG, Rcv_Stop);
  603         sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
  604         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. */
  605         CSR_WRITE_1(sc, MASK_REG, All_Int);
  606         CSR_WRITE_1(sc, STATUS_REG, All_Int);
  607         CSR_WRITE_1(sc, CMD_REG, Reset_CMD);
  608         DELAY(200);
  609         sc->ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
  610         sc->tx_timeout = 0;
  611         callout_stop(&sc->timer);
  612 
  613         DODEBUG(Start_End, printf("ex_stop%d: finish\n", unit););
  614 
  615         return;
  616 }
  617 
  618 void
  619 ex_intr(void *arg)
  620 {
  621         struct ex_softc *sc = (struct ex_softc *)arg;
  622         struct ifnet    *ifp = sc->ifp;
  623         int             int_status, send_pkts;
  624         int             loops = 100;
  625 
  626         DODEBUG(Start_End, printf("ex_intr%d: start\n", unit););
  627 
  628         EX_LOCK(sc);
  629         send_pkts = 0;
  630         while (loops-- > 0 &&
  631             (int_status = CSR_READ_1(sc, STATUS_REG)) & (Tx_Int | Rx_Int)) {
  632                 /* don't loop forever */
  633                 if (int_status == 0xff)
  634                         break;
  635                 if (int_status & Rx_Int) {
  636                         CSR_WRITE_1(sc, STATUS_REG, Rx_Int);
  637                         ex_rx_intr(sc);
  638                 } else if (int_status & Tx_Int) {
  639                         CSR_WRITE_1(sc, STATUS_REG, Tx_Int);
  640                         ex_tx_intr(sc);
  641                         send_pkts = 1;
  642                 }
  643         }
  644         if (loops == 0)
  645                 printf("100 loops are not enough\n");
  646 
  647         /*
  648          * If any packet has been transmitted, and there are queued packets to
  649          * be sent, attempt to send more packets to the network card.
  650          */
  651         if (send_pkts && (ifp->if_snd.ifq_head != NULL))
  652                 ex_start_locked(ifp);
  653         EX_UNLOCK(sc);
  654 
  655         DODEBUG(Start_End, printf("ex_intr%d: finish\n", unit););
  656 
  657         return;
  658 }
  659 
  660 static void
  661 ex_tx_intr(struct ex_softc *sc)
  662 {
  663         struct ifnet *  ifp = sc->ifp;
  664         int             tx_status;
  665 
  666         DODEBUG(Start_End, printf("ex_tx_intr%d: start\n", unit););
  667 
  668         /*
  669          * - Cancel the watchdog.
  670          * For all packets transmitted since last transmit interrupt:
  671          * - Advance chain pointer to next queued packet.
  672          * - Update statistics.
  673          */
  674 
  675         sc->tx_timeout = 0;
  676 
  677         while (sc->tx_head != sc->tx_tail) {
  678                 CSR_WRITE_2(sc, HOST_ADDR_REG, sc->tx_head);
  679 
  680                 if (!(CSR_READ_2(sc, IO_PORT_REG) & Done_bit))
  681                         break;
  682 
  683                 tx_status = CSR_READ_2(sc, IO_PORT_REG);
  684                 sc->tx_head = CSR_READ_2(sc, IO_PORT_REG);
  685 
  686                 if (tx_status & TX_OK_bit) {
  687                         if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
  688                 } else {
  689                         if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
  690                 }
  691 
  692                 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, tx_status & No_Collisions_bits);
  693         }
  694 
  695         /*
  696          * The card should be ready to accept more packets now.
  697          */
  698 
  699         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
  700 
  701         DODEBUG(Status, printf("OIDLE tx_intr\n"););
  702         DODEBUG(Start_End, printf("ex_tx_intr%d: finish\n", unit););
  703 
  704         return;
  705 }
  706 
  707 static void
  708 ex_rx_intr(struct ex_softc *sc)
  709 {
  710         struct ifnet *          ifp = sc->ifp;
  711         int                     rx_status;
  712         int                     pkt_len;
  713         int                     QQQ;
  714         struct mbuf *           m;
  715         struct mbuf *           ipkt;
  716         struct ether_header *   eh;
  717 
  718         DODEBUG(Start_End, printf("ex_rx_intr%d: start\n", unit););
  719 
  720         /*
  721          * For all packets received since last receive interrupt:
  722          * - If packet ok, read it into a new mbuf and queue it to interface,
  723          *   updating statistics.
  724          * - If packet bad, just discard it, and update statistics.
  725          * Finally, advance receive stop limit in card's memory to new location.
  726          */
  727 
  728         CSR_WRITE_2(sc, HOST_ADDR_REG, sc->rx_head);
  729 
  730         while (CSR_READ_2(sc, IO_PORT_REG) == RCV_Done) {
  731 
  732                 rx_status = CSR_READ_2(sc, IO_PORT_REG);
  733                 sc->rx_head = CSR_READ_2(sc, IO_PORT_REG);
  734                 QQQ = pkt_len = CSR_READ_2(sc, IO_PORT_REG);
  735 
  736                 if (rx_status & RCV_OK_bit) {
  737                         MGETHDR(m, M_NOWAIT, MT_DATA);
  738                         ipkt = m;
  739                         if (ipkt == NULL) {
  740                                 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
  741                         } else {
  742                                 ipkt->m_pkthdr.rcvif = ifp;
  743                                 ipkt->m_pkthdr.len = pkt_len;
  744                                 ipkt->m_len = MHLEN;
  745 
  746                                 while (pkt_len > 0) {
  747                                         if (pkt_len >= MINCLSIZE) {
  748                                                 if (MCLGET(m, M_NOWAIT)) {
  749                                                         m->m_len = MCLBYTES;
  750                                                 } else {
  751                                                         m_freem(ipkt);
  752                                                         if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
  753                                                         goto rx_another;
  754                                                 }
  755                                         }
  756                                         m->m_len = min(m->m_len, pkt_len);
  757 
  758           /*
  759            * NOTE: I'm assuming that all mbufs allocated are of even length,
  760            * except for the last one in an odd-length packet.
  761            */
  762 
  763                                         CSR_READ_MULTI_2(sc, IO_PORT_REG,
  764                                             mtod(m, uint16_t *), m->m_len / 2);
  765 
  766                                         if (m->m_len & 1) {
  767                                                 *(mtod(m, caddr_t) + m->m_len - 1) = CSR_READ_1(sc, IO_PORT_REG);
  768                                         }
  769                                         pkt_len -= m->m_len;
  770 
  771                                         if (pkt_len > 0) {
  772                                                 MGET(m->m_next, M_NOWAIT, MT_DATA);
  773                                                 if (m->m_next == NULL) {
  774                                                         m_freem(ipkt);
  775                                                         if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
  776                                                         goto rx_another;
  777                                                 }
  778                                                 m = m->m_next;
  779                                                 m->m_len = MLEN;
  780                                         }
  781                                 }
  782                                 eh = mtod(ipkt, struct ether_header *);
  783 #ifdef EXDEBUG
  784         if (debug_mask & Rcvd_Pkts) {
  785                 if ((eh->ether_dhost[5] != 0xff) || (eh->ether_dhost[0] != 0xff)) {
  786                         printf("Receive packet with %d data bytes: %6D -> ", QQQ, eh->ether_shost, ":");
  787                         printf("%6D\n", eh->ether_dhost, ":");
  788                 } /* QQQ */
  789         }
  790 #endif
  791                                 EX_UNLOCK(sc);
  792                                 (*ifp->if_input)(ifp, ipkt);
  793                                 EX_LOCK(sc);
  794                                 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
  795                         }
  796                 } else {
  797                         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
  798                 }
  799                 CSR_WRITE_2(sc, HOST_ADDR_REG, sc->rx_head);
  800 rx_another: ;
  801         }
  802 
  803         if (sc->rx_head < sc->rx_lower_limit + 2)
  804                 CSR_WRITE_2(sc, RCV_STOP_REG, sc->rx_upper_limit);
  805         else
  806                 CSR_WRITE_2(sc, RCV_STOP_REG, sc->rx_head - 2);
  807 
  808         DODEBUG(Start_End, printf("ex_rx_intr%d: finish\n", unit););
  809 
  810         return;
  811 }
  812 
  813 
  814 static int
  815 ex_ioctl(register struct ifnet *ifp, u_long cmd, caddr_t data)
  816 {
  817         struct ex_softc *       sc = ifp->if_softc;
  818         struct ifreq *          ifr = (struct ifreq *)data;
  819         int                     error = 0;
  820 
  821         DODEBUG(Start_End, printf("%s: ex_ioctl: start ", ifp->if_xname););
  822 
  823         switch(cmd) {
  824                 case SIOCSIFADDR:
  825                 case SIOCGIFADDR:
  826                 case SIOCSIFMTU:
  827                         error = ether_ioctl(ifp, cmd, data);
  828                         break;
  829 
  830                 case SIOCSIFFLAGS:
  831                         DODEBUG(Start_End, printf("SIOCSIFFLAGS"););
  832                         EX_LOCK(sc);
  833                         if ((ifp->if_flags & IFF_UP) == 0 &&
  834                             (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
  835                                 ex_stop(sc);
  836                         } else {
  837                                 ex_init_locked(sc);
  838                         }
  839                         EX_UNLOCK(sc);
  840                         break;
  841                 case SIOCADDMULTI:
  842                 case SIOCDELMULTI:
  843                         ex_init(sc);
  844                         error = 0;
  845                         break;
  846                 case SIOCSIFMEDIA:
  847                 case SIOCGIFMEDIA:
  848                         error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, cmd);
  849                         break;
  850                 default:
  851                         DODEBUG(Start_End, printf("unknown"););
  852                         error = EINVAL;
  853         }
  854 
  855         DODEBUG(Start_End, printf("\n%s: ex_ioctl: finish\n", ifp->if_xname););
  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         uint16_t *addr;
  866         int count;
  867         int timeout, status;
  868         
  869         ifp = sc->ifp;
  870 
  871         count = 0;
  872         if_maddr_rlock(ifp);
  873         TAILQ_FOREACH(maddr, &ifp->if_multiaddrs, ifma_link) {
  874                 if (maddr->ifma_addr->sa_family != AF_LINK)
  875                         continue;
  876                 count++;
  877         }
  878         if_maddr_runlock(ifp);
  879 
  880         if ((ifp->if_flags & IFF_PROMISC) || (ifp->if_flags & IFF_ALLMULTI)
  881                         || count > 63) {
  882                 /* Interface is in promiscuous mode or there are too many
  883                  * multicast addresses for the card to handle */
  884                 CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
  885                 CSR_WRITE_1(sc, REG2, CSR_READ_1(sc, REG2) | Promisc_Mode);
  886                 CSR_WRITE_1(sc, REG3, CSR_READ_1(sc, REG3));
  887                 CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
  888         }
  889         else if ((ifp->if_flags & IFF_MULTICAST) && (count > 0)) {
  890                 /* Program multicast addresses plus our MAC address
  891                  * into the filter */
  892                 CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
  893                 CSR_WRITE_1(sc, REG2, CSR_READ_1(sc, REG2) | Multi_IA);
  894                 CSR_WRITE_1(sc, REG3, CSR_READ_1(sc, REG3));
  895                 CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
  896 
  897                 /* Borrow space from TX buffer; this should be safe
  898                  * as this is only called from ex_init */
  899                 
  900                 CSR_WRITE_2(sc, HOST_ADDR_REG, sc->tx_lower_limit);
  901                 CSR_WRITE_2(sc, IO_PORT_REG, MC_Setup_CMD);
  902                 CSR_WRITE_2(sc, IO_PORT_REG, 0);
  903                 CSR_WRITE_2(sc, IO_PORT_REG, 0);
  904                 CSR_WRITE_2(sc, IO_PORT_REG, (count + 1) * 6);
  905 
  906                 if_maddr_rlock(ifp);
  907                 TAILQ_FOREACH(maddr, &ifp->if_multiaddrs, ifma_link) {
  908                         if (maddr->ifma_addr->sa_family != AF_LINK)
  909                                 continue;
  910 
  911                         addr = (uint16_t*)LLADDR((struct sockaddr_dl *)
  912                                         maddr->ifma_addr);
  913                         CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
  914                         CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
  915                         CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
  916                 }
  917                 if_maddr_runlock(ifp);
  918 
  919                 /* Program our MAC address as well */
  920                 /* XXX: Is this necessary?  The Linux driver does this
  921                  * but the NetBSD driver does not */
  922                 addr = (uint16_t*)IF_LLADDR(sc->ifp);
  923                 CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
  924                 CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
  925                 CSR_WRITE_2(sc, IO_PORT_REG, *addr++);
  926 
  927                 CSR_READ_2(sc, IO_PORT_REG);
  928                 CSR_WRITE_2(sc, XMT_BAR, sc->tx_lower_limit);
  929                 CSR_WRITE_1(sc, CMD_REG, MC_Setup_CMD);
  930 
  931                 sc->tx_head = sc->tx_lower_limit;
  932                 sc->tx_tail = sc->tx_head + XMT_HEADER_LEN + (count + 1) * 6;
  933 
  934                 for (timeout=0; timeout<100; timeout++) {
  935                         DELAY(2);
  936                         if ((CSR_READ_1(sc, STATUS_REG) & Exec_Int) == 0)
  937                                 continue;
  938 
  939                         status = CSR_READ_1(sc, CMD_REG);
  940                         CSR_WRITE_1(sc, STATUS_REG, Exec_Int);
  941                         break;
  942                 }
  943 
  944                 sc->tx_head = sc->tx_tail;
  945         }
  946         else
  947         {
  948                 /* No multicast or promiscuous mode */
  949                 CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
  950                 CSR_WRITE_1(sc, REG2, CSR_READ_1(sc, REG2) & 0xDE);
  951                         /* ~(Multi_IA | Promisc_Mode) */
  952                 CSR_WRITE_1(sc, REG3, CSR_READ_1(sc, REG3));
  953                 CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
  954         }
  955 }
  956 
  957 static void
  958 ex_reset(struct ex_softc *sc)
  959 {
  960 
  961         DODEBUG(Start_End, printf("ex_reset%d: start\n", unit););
  962 
  963         EX_ASSERT_LOCKED(sc);
  964         ex_stop(sc);
  965         ex_init_locked(sc);
  966 
  967         DODEBUG(Start_End, printf("ex_reset%d: finish\n", unit););
  968 
  969         return;
  970 }
  971 
  972 static void
  973 ex_watchdog(void *arg)
  974 {
  975         struct ex_softc *       sc = arg;
  976         struct ifnet *ifp = sc->ifp;
  977 
  978         if (sc->tx_timeout && --sc->tx_timeout == 0) {
  979                 DODEBUG(Start_End, if_printf(ifp, "ex_watchdog: start\n"););
  980 
  981                 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
  982 
  983                 DODEBUG(Status, printf("OIDLE watchdog\n"););
  984 
  985                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
  986                 ex_reset(sc);
  987                 ex_start_locked(ifp);
  988 
  989                 DODEBUG(Start_End, if_printf(ifp, "ex_watchdog: finish\n"););
  990         }
  991 
  992         callout_reset(&sc->timer, hz, ex_watchdog, sc);
  993 }
  994 
  995 static int
  996 ex_get_media(struct ex_softc *sc)
  997 {
  998         int     current;
  999         int     media;
 1000 
 1001         media = ex_eeprom_read(sc, EE_W5);
 1002 
 1003         CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
 1004         current = CSR_READ_1(sc, REG3);
 1005         CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
 1006 
 1007         if ((current & TPE_bit) && (media & EE_W5_PORT_TPE))
 1008                 return(IFM_ETHER|IFM_10_T);
 1009         if ((current & BNC_bit) && (media & EE_W5_PORT_BNC))
 1010                 return(IFM_ETHER|IFM_10_2);
 1011 
 1012         if (media & EE_W5_PORT_AUI)
 1013                 return (IFM_ETHER|IFM_10_5);
 1014 
 1015         return (IFM_ETHER|IFM_AUTO);
 1016 }
 1017 
 1018 static int
 1019 ex_ifmedia_upd(ifp)
 1020         struct ifnet *          ifp;
 1021 {
 1022         struct ex_softc *       sc = ifp->if_softc;
 1023 
 1024         if (IFM_TYPE(sc->ifmedia.ifm_media) != IFM_ETHER)
 1025                 return EINVAL;
 1026 
 1027         return (0);
 1028 }
 1029 
 1030 static void
 1031 ex_ifmedia_sts(ifp, ifmr)
 1032         struct ifnet *          ifp;
 1033         struct ifmediareq *     ifmr;
 1034 {
 1035         struct ex_softc *       sc = ifp->if_softc;
 1036 
 1037         EX_LOCK(sc);
 1038         ifmr->ifm_active = ex_get_media(sc);
 1039         ifmr->ifm_status = IFM_AVALID | IFM_ACTIVE;
 1040         EX_UNLOCK(sc);
 1041 
 1042         return;
 1043 }
 1044 
 1045 u_short
 1046 ex_eeprom_read(struct ex_softc *sc, int location)
 1047 {
 1048         int i;
 1049         u_short data = 0;
 1050         int read_cmd = location | EE_READ_CMD;
 1051         short ctrl_val = EECS;
 1052 
 1053         CSR_WRITE_1(sc, CMD_REG, Bank2_Sel);
 1054         CSR_WRITE_1(sc, EEPROM_REG, EECS);
 1055         for (i = 8; i >= 0; i--) {
 1056                 short outval = (read_cmd & (1 << i)) ? ctrl_val | EEDI : ctrl_val;
 1057                 CSR_WRITE_1(sc, EEPROM_REG, outval);
 1058                 CSR_WRITE_1(sc, EEPROM_REG, outval | EESK);
 1059                 DELAY(3);
 1060                 CSR_WRITE_1(sc, EEPROM_REG, outval);
 1061                 DELAY(2);
 1062         }
 1063         CSR_WRITE_1(sc, EEPROM_REG, ctrl_val);
 1064 
 1065         for (i = 16; i > 0; i--) {
 1066                 CSR_WRITE_1(sc, EEPROM_REG, ctrl_val | EESK);
 1067                 DELAY(3);
 1068                 data = (data << 1) | 
 1069                     ((CSR_READ_1(sc, EEPROM_REG) & EEDO) ? 1 : 0);
 1070                 CSR_WRITE_1(sc, EEPROM_REG, ctrl_val);
 1071                 DELAY(2);
 1072         }
 1073 
 1074         ctrl_val &= ~EECS;
 1075         CSR_WRITE_1(sc, EEPROM_REG, ctrl_val | EESK);
 1076         DELAY(3);
 1077         CSR_WRITE_1(sc, EEPROM_REG, ctrl_val);
 1078         DELAY(2);
 1079         CSR_WRITE_1(sc, CMD_REG, Bank0_Sel);
 1080         return(data);
 1081 }

Cache object: 188bf828f5dd1d1315c9f23e9c535f71


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