root/dev/ic/am7990.c

DEFINITIONS

1. ether_cmp
2. am7990_config
3. am7990_reset
4. am7990_meminit
5. am7990_stop
6. am7990_init
7. am7990_put
8. am7990_get
9. am7990_read
10. am7990_rint
11. am7990_tint
12. am7990_intr
13. am7990_watchdog
14. am7990_start
15. am7990_ioctl
16. am7990_shutdown
17. am7990_recv_print
18. am7990_xmit_print
19. am7990_setladrf
20. am7990_copytobuf_contig
21. am7990_copyfrombuf_contig
22. am7990_zerobuf_contig
23. am7990_copytobuf_gap2
24. am7990_copyfrombuf_gap2
25. am7990_zerobuf_gap2
26. am7990_copytobuf_gap16
27. am7990_copyfrombuf_gap16
28. am7990_zerobuf_gap16

    1 /*      $OpenBSD: am7990.c,v 1.41 2006/04/20 20:31:12 miod Exp $        */
    2 /*      $NetBSD: am7990.c,v 1.22 1996/10/13 01:37:19 christos Exp $     */
    4 /*-
    5  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
    6  * Copyright (c) 1992, 1993
    7  *      The Regents of the University of California.  All rights reserved.
    8  *
    9  * This code is derived from software contributed to Berkeley by
   10  * Ralph Campbell and Rick Macklem.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      @(#)if_le.c     8.2 (Berkeley) 11/16/93
   37  */
   39 #include "bpfilter.h"
   41 #include <sys/param.h>
   42 #include <sys/systm.h>
   43 #include <sys/mbuf.h> 
   44 #include <sys/syslog.h>
   45 #include <sys/socket.h>
   46 #include <sys/device.h>
   47 #include <sys/malloc.h>
   48 #include <sys/ioctl.h>
   49 #include <sys/errno.h>
   51 #include <net/if.h>
   52 #include <net/if_media.h>
   54 #ifdef INET
   55 #include <netinet/in.h>
   56 #include <netinet/if_ether.h>
   57 #include <netinet/in_systm.h>
   58 #include <netinet/in_var.h>
   59 #include <netinet/ip.h>
   60 #endif
   62 #if NBPFILTER > 0
   63 #include <net/bpf.h>
   64 #endif
   66 #include <dev/ic/am7990reg.h>
   67 #include <dev/ic/am7990var.h>
   69 #ifdef LEDEBUG
   70 void am7990_recv_print(struct am7990_softc *, int);
   71 void am7990_xmit_print(struct am7990_softc *, int);
   72 #endif
integrate void am7990_rint(struct am7990_softc *);
integrate void am7990_tint(struct am7990_softc *);
integrate int am7990_put(struct am7990_softc *, int, struct mbuf *);
integrate struct mbuf *am7990_get(struct am7990_softc *, int, int);
integrate void am7990_read(struct am7990_softc *, int, int); 
hide void am7990_shutdown(void *);
   83 #define ifp     (&sc->sc_arpcom.ac_if)
   85 #if 0   /* XXX what do we do about this?!  --thorpej */
   86 static inline u_int16_t ether_cmp(void *, void *);
   88 /*
   89  * Compare two Ether/802 addresses for equality, inlined and
   90  * unrolled for speed.  I'd love to have an inline assembler
   91  * version of this...   XXX: Who wanted that? mycroft?
   92  * I wrote one, but the following is just as efficient.
   93  * This expands to 10 short m68k instructions! -gwr
   94  * Note: use this like bcmp()
   95  */
   96 static inline u_short
ether_cmp(one, two)
   98         void *one, *two;
   99 {
  100         register u_int16_t *a = (u_short *) one;
  101         register u_int16_t *b = (u_short *) two;
  102         register u_int16_t diff;
diff  = *a++ - *b++;
diff |= *a++ - *b++;
diff |= *a++ - *b++;
  108         return (diff);
  109 }
  111 #define ETHER_CMP       ether_cmp
  112 #endif /* XXX */
  114 #ifndef ETHER_CMP
  115 #define ETHER_CMP(a, b) bcmp((a), (b), ETHER_ADDR_LEN)
  116 #endif
  118 /*
  119  * am7990 configuration driver.  Attachments are provided by
  120  * machine-dependent driver front-ends.
  121  */
  122 struct cfdriver le_cd = {
NULL, "le", DV_IFNET
  124 };
  126 void
am7990_config(sc)
  128         struct am7990_softc *sc;
  129 {
  130         int mem;
  132         /* Make sure the chip is stopped. */
am7990_stop(sc);
  135         /* Initialize ifnet structure. */
bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ);
ifp->if_softc = sc;
ifp->if_start = am7990_start;
ifp->if_ioctl = am7990_ioctl;
ifp->if_watchdog = am7990_watchdog;
ifp->if_flags =
IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST;
  143 #ifdef LANCE_REVC_BUG
ifp->if_flags &= ~IFF_MULTICAST;
  145 #endif
ifp->if_baudrate = IF_Mbps(10);
IFQ_SET_READY(&ifp->if_snd);
ifp->if_capabilities = IFCAP_VLAN_MTU;
  151         /* Attach the interface. */
if_attach(ifp);
ether_ifattach(ifp);
  155         if (sc->sc_memsize > 262144)
sc->sc_memsize = 262144;
  158         switch (sc->sc_memsize) {
  159         case 8192:
sc->sc_nrbuf = 4;
sc->sc_ntbuf = 1;
  162                 break;
  163         case 16384:
sc->sc_nrbuf = 8;
sc->sc_ntbuf = 2;
  166                 break;
  167         case 32768:
sc->sc_nrbuf = 16;
sc->sc_ntbuf = 4;
  170                 break;
  171         case 65536:
sc->sc_nrbuf = 32;
sc->sc_ntbuf = 8;
  174                 break;
  175         case 131072:
sc->sc_nrbuf = 64;
sc->sc_ntbuf = 16;
  178                 break;
  179         case 262144:
sc->sc_nrbuf = 128;
sc->sc_ntbuf = 32;
  182                 break;
  183         default:
panic("am7990_config: weird memory size %lu", sc->sc_memsize);
  185         }
printf(": address %s\n", ether_sprintf(sc->sc_arpcom.ac_enaddr));
printf("%s: %d receive buffers, %d transmit buffers\n",
sc->sc_dev.dv_xname, sc->sc_nrbuf, sc->sc_ntbuf);
sc->sc_sh = shutdownhook_establish(am7990_shutdown, sc);
  192         if (sc->sc_sh == NULL)
panic("am7990_config: can't establish shutdownhook");
mem = 0;
sc->sc_initaddr = mem;
mem += sizeof(struct leinit);
sc->sc_rmdaddr = mem;
mem += sizeof(struct lermd) * sc->sc_nrbuf;
sc->sc_tmdaddr = mem;
mem += sizeof(struct letmd) * sc->sc_ntbuf;
sc->sc_rbufaddr = mem;
mem += ETHER_MAX_DIX_LEN * sc->sc_nrbuf;
sc->sc_tbufaddr = mem;
mem += ETHER_MAX_DIX_LEN * sc->sc_ntbuf;
  206 #ifdef notyet
  207         if (mem > ...)
panic(...);
  209 #endif
  210 }
  212 void
am7990_reset(sc)
  214         struct am7990_softc *sc;
  215 {
  216         int s;
s = splnet();
am7990_init(sc);
splx(s);
  221 }
  223 /*
  224  * Set up the initialization block and the descriptor rings.
  225  */
  226 void
am7990_meminit(sc)
  228         register struct am7990_softc *sc;
  229 {
u_long a;
  231         int bix;
  232         struct leinit init;
  233         struct lermd rmd;
  234         struct letmd tmd;
  236 #if NBPFILTER > 0
  237         if (ifp->if_flags & IFF_PROMISC)
init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
  239         else
  240 #endif
init.init_mode = LE_MODE_NORMAL;
init.init_padr[0] =
  243             (sc->sc_arpcom.ac_enaddr[1] << 8) | sc->sc_arpcom.ac_enaddr[0];
init.init_padr[1] =
  245             (sc->sc_arpcom.ac_enaddr[3] << 8) | sc->sc_arpcom.ac_enaddr[2];
init.init_padr[2] =
  247             (sc->sc_arpcom.ac_enaddr[5] << 8) | sc->sc_arpcom.ac_enaddr[4];
am7990_setladrf(&sc->sc_arpcom, init.init_ladrf);
sc->sc_last_rd = 0;
sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
a = sc->sc_addr + LE_RMDADDR(sc, 0);
init.init_rdra = a;
init.init_rlen = (a >> 16) | ((ffs(sc->sc_nrbuf) - 1) << 13);
a = sc->sc_addr + LE_TMDADDR(sc, 0);
init.init_tdra = a;
init.init_tlen = (a >> 16) | ((ffs(sc->sc_ntbuf) - 1) << 13);
  261         (*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
  263         /*
  264          * Set up receive ring descriptors.
  265          */
  266         for (bix = 0; bix < sc->sc_nrbuf; bix++) {
a = sc->sc_addr + LE_RBUFADDR(sc, bix);
rmd.rmd0 = a;
rmd.rmd1_hadr = a >> 16;
rmd.rmd1_bits = LE_R1_OWN;
rmd.rmd2 = -ETHER_MAX_DIX_LEN | LE_XMD2_ONES;
rmd.rmd3 = 0;
  273                 (*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
  274                     sizeof(rmd));
  275         }
  277         /*
  278          * Set up transmit ring descriptors.
  279          */
  280         for (bix = 0; bix < sc->sc_ntbuf; bix++) {
a = sc->sc_addr + LE_TBUFADDR(sc, bix);
tmd.tmd0 = a;
tmd.tmd1_hadr = a >> 16;
tmd.tmd1_bits = 0;
tmd.tmd2 = 0 | LE_XMD2_ONES;
tmd.tmd3 = 0;
  287                 (*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
  288                     sizeof(tmd));
  289         }
  290 }
  292 void
am7990_stop(sc)
  294         struct am7990_softc *sc;
  295 {
  297         (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP);
  298 }
  300 /*
  301  * Initialization of interface; set up initialization block
  302  * and transmit/receive descriptor rings.
  303  */
  304 void
am7990_init(sc)
  306         register struct am7990_softc *sc;
  307 {
  308         register int timo;
u_long a;
  311         (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP);
DELAY(100);
  314         /* Newer LANCE chips have a reset register */
  315         if (sc->sc_hwreset)
  316                 (*sc->sc_hwreset)(sc);
  318         /* Set the correct byte swapping mode, etc. */
  319         (*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3);
  321         /* Set up LANCE init block. */
am7990_meminit(sc);
  324         /* Give LANCE the physical address of its init block. */
a = sc->sc_addr + LE_INITADDR(sc);
  326         (*sc->sc_wrcsr)(sc, LE_CSR1, a);
  327         (*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16);
  329         /* Try to initialize the LANCE. */
DELAY(100);
  331         (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT);
  333         /* Wait for initialization to finish. */
  334         for (timo = 100000; timo; timo--)
  335                 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON)
  336                         break;
  338         if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) {
  339                 /* Start the LANCE. */
  340                 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT |
LE_C0_IDON);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
am7990_start(ifp);
  346         } else
printf("%s: controller failed to initialize\n", sc->sc_dev.dv_xname);
  348         if (sc->sc_hwinit)
  349                 (*sc->sc_hwinit)(sc);
  350 }
  352 /*
  353  * Routine to copy from mbuf chain to transmit buffer in
  354  * network buffer memory.
  355  */
integrate int
am7990_put(sc, boff, m)
  358         struct am7990_softc *sc;
  359         int boff;
  360         register struct mbuf *m;
  361 {
  362         register struct mbuf *n;
  363         register int len, tlen = 0;
  365         for (; m; m = n) {
len = m->m_len;
  367                 if (len == 0) {
MFREE(m, n);
  369                         continue;
  370                 }
  371                 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len);
boff += len;
tlen += len;
MFREE(m, n);
  375         }
  376         if (tlen < LEMINSIZE) {
  377                 (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen);
tlen = LEMINSIZE;
  379         }
  380         return (tlen);
  381 }
  383 /*
  384  * Pull data off an interface.
  385  * Len is length of data, with local net header stripped.
  386  * We copy the data into mbufs.  When full cluster sized units are present
  387  * we copy into clusters.
  388  */
integrate struct mbuf *
am7990_get(sc, boff, totlen)
  391         struct am7990_softc *sc;
  392         int boff, totlen;
  393 {
  394         register struct mbuf *m;
  395         struct mbuf *top, **mp;
  396         int len, pad;
MGETHDR(m, M_DONTWAIT, MT_DATA);
  399         if (m == 0)
  400                 return (0);
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = totlen;
pad = ALIGN(sizeof(struct ether_header)) - sizeof(struct ether_header);
m->m_data += pad;
len = MHLEN - pad;
top = 0;
mp = &top;
  409         while (totlen > 0) {
  410                 if (top) {
MGET(m, M_DONTWAIT, MT_DATA);
  412                         if (m == 0) {
m_freem(top);
  414                                 return 0;
  415                         }
len = MLEN;
  417                 }
  418                 if (totlen >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
  420                         if (m->m_flags & M_EXT) {
len = MCLBYTES;
  422                                 if (!top) {
m->m_data += pad;
len -= pad;
  425                                 }
  426                         }
  427                 }
m->m_len = len = min(totlen, len);
  429                 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len);
boff += len;
totlen -= len;
  432                 *mp = m;
mp = &m->m_next;
  434         }
  436         return (top);
  437 }
  439 /*
  440  * Pass a packet to the higher levels.
  441  */
integrate void
am7990_read(sc, boff, len)
  444         register struct am7990_softc *sc;
  445         int boff, len;
  446 {
  447         struct mbuf *m;
  448 #ifdef LANCE_REVC_BUG
  449         struct ether_header *eh;
  450 #endif
  452         if (len <= sizeof(struct ether_header) ||
len > ETHERMTU + ETHER_VLAN_ENCAP_LEN + sizeof(struct ether_header)) {
  454 #ifdef LEDEBUG
printf("%s: invalid packet size %d; dropping\n",
sc->sc_dev.dv_xname, len);
  457 #endif
ifp->if_ierrors++;
  459                 return;
  460         }
  462         /* Pull packet off interface. */
m = am7990_get(sc, boff, len);
  464         if (m == 0) {
ifp->if_ierrors++;
  466                 return;
  467         }
ifp->if_ipackets++;
  471 #if NBPFILTER > 0
  472         /*
  473          * Check if there's a BPF listener on this interface.
  474          * If so, hand off the raw packet to BPF.
  475          */
  476         if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_IN);
  478 #endif
  480 #ifdef LANCE_REVC_BUG
  481         /*
  482          * The old LANCE (Rev. C) chips have a bug which causes
  483          * garbage to be inserted in front of the received packet.
  484          * The work-around is to ignore packets with an invalid
  485          * destination address (garbage will usually not match).
  486          * Of course, this precludes multicast support...
  487          */
eh = mtod(m, struct ether_header *);
  489         if (ETHER_CMP(eh->ether_dhost, sc->sc_arpcom.ac_enaddr) &&
ETHER_CMP(eh->ether_dhost, etherbroadcastaddr)) {
m_freem(m);
  492                 return;
  493         }
  494 #endif
  496         /* Pass the packet up. */
ether_input_mbuf(ifp, m);
  498 }
integrate void
am7990_rint(sc)
  502         struct am7990_softc *sc;
  503 {
  504         register int bix;
  505         int rp;
  506         struct lermd rmd;
bix = sc->sc_last_rd;
  510         /* Process all buffers with valid data. */
  511         for (;;) {
rp = LE_RMDADDR(sc, bix);
  513                 (*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
  515                 if (rmd.rmd1_bits & LE_R1_OWN)
  516                         break;
  518                 if (rmd.rmd1_bits & LE_R1_ERR) {
  519                         if (rmd.rmd1_bits & LE_R1_ENP) {
  520 #ifdef LEDEBUG
  521                                 if ((rmd.rmd1_bits & LE_R1_OFLO) == 0) {
  522                                         if (rmd.rmd1_bits & LE_R1_FRAM)
printf("%s: framing error\n",
sc->sc_dev.dv_xname);
  525                                         if (rmd.rmd1_bits & LE_R1_CRC)
printf("%s: crc mismatch\n",
sc->sc_dev.dv_xname);
  528                                 }
  529 #endif
  530                         } else {
  531                                 if (rmd.rmd1_bits & LE_R1_OFLO)
printf("%s: overflow\n",
sc->sc_dev.dv_xname);
  534                         }
  535                         if (rmd.rmd1_bits & LE_R1_BUFF)
printf("%s: receive buffer error\n",
sc->sc_dev.dv_xname);
ifp->if_ierrors++;
  539                 } else if ((rmd.rmd1_bits & (LE_R1_STP | LE_R1_ENP)) !=
  540                     (LE_R1_STP | LE_R1_ENP)) {
printf("%s: dropping chained buffer\n",
sc->sc_dev.dv_xname);
ifp->if_ierrors++;
  544                 } else {
  545 #ifdef LEDEBUG1
  546                         if (sc->sc_debug)
am7990_recv_print(sc, sc->sc_last_rd);
  548 #endif
am7990_read(sc, LE_RBUFADDR(sc, bix),
  550                             (int)rmd.rmd3 - 4);
  551                 }
rmd.rmd1_bits = LE_R1_OWN;
rmd.rmd2 = -ETHER_MAX_DIX_LEN | LE_XMD2_ONES;
rmd.rmd3 = 0;
  556                 (*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
  558 #ifdef LEDEBUG1
  559                 if (sc->sc_debug)
printf("sc->sc_last_rd = %x, rmd: "
  561                                "ladr %04x, hadr %02x, flags %02x, "
  562                                "bcnt %04x, mcnt %04x\n",
sc->sc_last_rd,
rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits,
rmd.rmd2, rmd.rmd3);
  566 #endif
  568                 if (++bix == sc->sc_nrbuf)
bix = 0;
  570         }
sc->sc_last_rd = bix;
  573 }
integrate void
am7990_tint(sc)
  577         register struct am7990_softc *sc;
  578 {
  579         register int bix;
  580         struct letmd tmd;
bix = sc->sc_first_td;
  584         for (;;) {
  585                 if (sc->sc_no_td <= 0)
  586                         break;
  588                 (*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
  589                     sizeof(tmd));
  591 #ifdef LEDEBUG
  592                 if (sc->sc_debug)
printf("trans tmd: "
  594                             "ladr %04x, hadr %02x, flags %02x, "
  595                             "bcnt %04x, mcnt %04x\n",
tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits,
tmd.tmd2, tmd.tmd3);
  598 #endif
  600                 if (tmd.tmd1_bits & LE_T1_OWN)
  601                         break;
ifp->if_flags &= ~IFF_OACTIVE;
  605                 if (tmd.tmd1_bits & LE_T1_ERR) {
  606                         if (tmd.tmd3 & LE_T3_BUFF)
printf("%s: transmit buffer error\n",
sc->sc_dev.dv_xname);
  609                         else if (tmd.tmd3 & LE_T3_UFLO)
printf("%s: underflow\n", sc->sc_dev.dv_xname);
  611                         if (tmd.tmd3 & (LE_T3_BUFF | LE_T3_UFLO)) {
am7990_reset(sc);
  613                                 return;
  614                         }
  615                         if (tmd.tmd3 & LE_T3_LCAR) {
  616                                 if (sc->sc_nocarrier)
  617                                         (*sc->sc_nocarrier)(sc);
  618                         }
  619                         if (tmd.tmd3 & LE_T3_LCOL)
ifp->if_collisions++;
  621                         if (tmd.tmd3 & LE_T3_RTRY) {
printf("%s: excessive collisions, tdr %d\n",
sc->sc_dev.dv_xname,
tmd.tmd3 & LE_T3_TDR_MASK);
ifp->if_collisions += 16;
  626                         }
ifp->if_oerrors++;
  628                 } else {
  629                         if (tmd.tmd1_bits & LE_T1_ONE)
ifp->if_collisions++;
  631                         else if (tmd.tmd1_bits & LE_T1_MORE)
  632                                 /* Real number is unknown. */
ifp->if_collisions += 2;
ifp->if_opackets++;
  635                 }
  637                 if (++bix == sc->sc_ntbuf)
bix = 0;
  640                 --sc->sc_no_td;
  641         }
sc->sc_first_td = bix;
am7990_start(ifp);
  647         if (sc->sc_no_td == 0)
ifp->if_timer = 0;
  649 }
  651 /*
  652  * Controller interrupt.
  653  */
  654 int
am7990_intr(arg)
  656         register void *arg;
  657 {
  658         register struct am7990_softc *sc = arg;
  659         register u_int16_t isr;
isr = (*sc->sc_rdcsr)(sc, LE_CSR0);
  662 #ifdef LEDEBUG
  663         if (sc->sc_debug){
printf("%s: am7990_intr entering with isr=%04x\n",
sc->sc_dev.dv_xname, isr);
printf(" isr: 0x%b\n", isr, LE_C0_BITS);
  667         }
  668 #endif
  669         if ((isr & LE_C0_INTR) == 0)
  670                 return (0);
  672         /*
  673          * After receiving an interrupt, we need to toggle the interrupt
  674          * enable bit in order to keep receiving them (some chips works
  675          * without this, some do not)
  676          */
  677         (*sc->sc_wrcsr)(sc, LE_CSR0, isr & ~LE_C0_INEA);
  678         (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA);
  680         if (isr & LE_C0_ERR) {
  681                 if (isr & LE_C0_BABL) {
  682 #ifdef LEDEBUG
printf("%s: babble\n", sc->sc_dev.dv_xname);
  684 #endif
ifp->if_oerrors++;
  686                 }
  687 #if 0
  688                 if (isr & LE_C0_CERR) {
printf("%s: collision error\n", sc->sc_dev.dv_xname);
ifp->if_collisions++;
  691                 }
  692 #endif
  693                 if (isr & LE_C0_MISS) {
  694 #ifdef LEDEBUG
printf("%s: missed packet\n", sc->sc_dev.dv_xname);
  696 #endif
ifp->if_ierrors++;
  698                 }
  699                 if (isr & LE_C0_MERR) {
printf("%s: memory error\n", sc->sc_dev.dv_xname);
am7990_reset(sc);
  702                         return (1);
  703                 }
  704         }
  706         if ((isr & LE_C0_RXON) == 0) {
printf("%s: receiver disabled\n", sc->sc_dev.dv_xname);
ifp->if_ierrors++;
am7990_reset(sc);
  710                 return (1);
  711         }
  712         if ((isr & LE_C0_TXON) == 0) {
printf("%s: transmitter disabled\n", sc->sc_dev.dv_xname);
ifp->if_oerrors++;
am7990_reset(sc);
  716                 return (1);
  717         }
  719         if (isr & LE_C0_RINT)
am7990_rint(sc);
  721         if (isr & LE_C0_TINT)
am7990_tint(sc);
  724         return (1);
  725 }
  727 #undef  ifp
  729 void
am7990_watchdog(ifp)
  731         struct ifnet *ifp;
  732 {
  733         struct am7990_softc *sc = ifp->if_softc;
log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname);
  736         ++ifp->if_oerrors;
am7990_reset(sc);
  739 }
  741 /*
  742  * Setup output on interface.
  743  * Get another datagram to send off of the interface queue, and map it to the
  744  * interface before starting the output.
  745  * Called only at splnet or interrupt level.
  746  */
  747 void
am7990_start(ifp)
  749         register struct ifnet *ifp;
  750 {
  751         register struct am7990_softc *sc = ifp->if_softc;
  752         register int bix;
  753         register struct mbuf *m;
  754         struct letmd tmd;
  755         int rp;
  756         int len;
  758         if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
  759                 return;
bix = sc->sc_last_td;
  763         for (;;) {
rp = LE_TMDADDR(sc, bix);
  765                 (*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
  767                 if (tmd.tmd1_bits & LE_T1_OWN) {
ifp->if_flags |= IFF_OACTIVE;
printf("missing buffer, no_td = %d, last_td = %d\n",
sc->sc_no_td, sc->sc_last_td);
  771                 }
IFQ_DEQUEUE(&ifp->if_snd, m);
  774                 if (m == 0)
  775                         break;
  777 #if NBPFILTER > 0
  778                 /*
  779                  * If BPF is listening on this interface, let it see the packet
  780                  * before we commit it to the wire.
  781                  */
  782                 if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT);
  784 #endif
  786                 /*
  787                  * Copy the mbuf chain into the transmit buffer.
  788                  */
len = am7990_put(sc, LE_TBUFADDR(sc, bix), m);
  791 #ifdef LEDEBUG
  792                 if (len > ETHERMTU + sizeof(struct ether_header))
printf("packet length %d\n", len);
  794 #endif
ifp->if_timer = 5;
  798                 /*
  799                  * Init transmit registers, and set transmit start flag.
  800                  */
tmd.tmd1_bits = LE_T1_OWN | LE_T1_STP | LE_T1_ENP;
tmd.tmd2 = -len | LE_XMD2_ONES;
tmd.tmd3 = 0;
  805                 (*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
  807 #ifdef LEDEBUG
  808                 if (sc->sc_debug)
am7990_xmit_print(sc, sc->sc_last_td);
  810 #endif
  812                 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
  814                 if (++bix == sc->sc_ntbuf)
bix = 0;
  817                 if (++sc->sc_no_td == sc->sc_ntbuf) {
  818 #ifdef LEDEBUG
printf("\nequal!\n");
  820 #endif
ifp->if_flags |= IFF_OACTIVE;
  822                         break;
  823                 }
  825         }
sc->sc_last_td = bix;
  828 }
  830 /*
  831  * Process an ioctl request.
  832  */
  833 int
am7990_ioctl(ifp, cmd, data)
  835         register struct ifnet *ifp;
u_long cmd;
caddr_t data;
  838 {
  839         register struct am7990_softc *sc = ifp->if_softc;
  840         struct ifaddr *ifa = (struct ifaddr *)data;
  841         struct ifreq *ifr = (struct ifreq *)data;
  842         int s, error = 0;
s = splnet();
  846         if ((error = ether_ioctl(ifp, &sc->sc_arpcom, cmd, data)) > 0) {
splx(s);
  848                 return error;
  849         }
  851         switch (cmd) {
  853         case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
  856                 switch (ifa->ifa_addr->sa_family) {
  857 #ifdef INET
  858                 case AF_INET:
am7990_init(sc);
arp_ifinit(&sc->sc_arpcom, ifa);
  861                         break;
  862 #endif
  863                 default:
am7990_init(sc);
  865                         break;
  866                 }
  867                 break;
  869         case SIOCSIFFLAGS:
  870                 if ((ifp->if_flags & IFF_UP) == 0 &&
  871                     (ifp->if_flags & IFF_RUNNING) != 0) {
  872                         /*
  873                          * If interface is marked down and it is running, then
  874                          * stop it.
  875                          */
am7990_stop(sc);
ifp->if_flags &= ~IFF_RUNNING;
  878                 } else if ((ifp->if_flags & IFF_UP) != 0 &&
  879                            (ifp->if_flags & IFF_RUNNING) == 0) {
  880                         /*
  881                          * If interface is marked up and it is stopped, then
  882                          * start it.
  883                          */
am7990_init(sc);
  885                 } else {
  886                         /*
  887                          * Reset the interface to pick up changes in any other
  888                          * flags that affect hardware registers.
  889                          */
  890                         /*am7990_stop(sc);*/
am7990_init(sc);
  892                 }
  893 #ifdef LEDEBUG
  894                 if (ifp->if_flags & IFF_DEBUG)
sc->sc_debug = 1;
  896                 else
sc->sc_debug = 0;
  898 #endif
  899                 break;
  901         case SIOCADDMULTI:
  902         case SIOCDELMULTI:
error = (cmd == SIOCADDMULTI) ?
ether_addmulti(ifr, &sc->sc_arpcom) :
ether_delmulti(ifr, &sc->sc_arpcom);
  907                 if (error == ENETRESET) {
  908                         /*
  909                          * Multicast list has changed; set the hardware filter
  910                          * accordingly.
  911                          */
  912                         if (ifp->if_flags & IFF_RUNNING)
am7990_reset(sc);
error = 0;
  915                 }
  916                 break;
  918         case SIOCGIFMEDIA:
  919         case SIOCSIFMEDIA:
  920                 if (sc->sc_hasifmedia)
error = ifmedia_ioctl(ifp, ifr, &sc->sc_ifmedia, cmd);
  922                 else
error = EINVAL;
  924                 break;
  926         default:
error = EINVAL;
  928                 break;
  929         }
splx(s);
  932         return (error);
  933 }
hide void
am7990_shutdown(arg)
  937         void *arg;
  938 {
am7990_stop((struct am7990_softc *)arg);
  941 }
  943 #ifdef LEDEBUG
  944 void
am7990_recv_print(sc, no)
  946         struct am7990_softc *sc;
  947         int no;
  948 {
  949         struct lermd rmd;
u_int16_t len;
  951         struct ether_header eh;
  953         (*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
len = rmd.rmd3;
printf("%s: receive buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
len);
printf("%s: status %04x\n", sc->sc_dev.dv_xname,
  958             (*sc->sc_rdcsr)(sc, LE_CSR0));
printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
sc->sc_dev.dv_xname,
rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3);
  962         if (len >= sizeof(eh)) {
  963                 (*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
printf("%s: dst %s", sc->sc_dev.dv_xname,
ether_sprintf(eh.ether_dhost));
printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
ntohs(eh.ether_type));
  968         }
  969 }
  971 void
am7990_xmit_print(sc, no)
  973         struct am7990_softc *sc;
  974         int no;
  975 {
  976         struct letmd tmd;
u_int16_t len;
  978         struct ether_header eh;
  980         (*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
len = -tmd.tmd2;
printf("%s: transmit buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
len);
printf("%s: status %04x\n", sc->sc_dev.dv_xname,
  985             (*sc->sc_rdcsr)(sc, LE_CSR0));
printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
sc->sc_dev.dv_xname,
tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits, tmd.tmd2, tmd.tmd3);
  989         if (len >= sizeof(eh)) {
  990                 (*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
printf("%s: dst %s", sc->sc_dev.dv_xname,
ether_sprintf(eh.ether_dhost));
printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
ntohs(eh.ether_type));
  995         }
  996 }
  997 #endif /* LEDEBUG */
  999 /*
 1000  * Set up the logical address filter.
 1001  */
 1002 void
am7990_setladrf(ac, af)
 1004         struct arpcom *ac;
u_int16_t *af;
 1006 {
 1007         struct ifnet *ifp = &ac->ac_if;
 1008         struct ether_multi *enm;
 1009         register u_int32_t crc;
 1010         struct ether_multistep step;
 1012         /*
 1013          * Set up multicast address filter by passing all multicast addresses
 1014          * through a crc generator, and then using the high order 6 bits as an
 1015          * index into the 64 bit logical address filter.  The high order bit
 1016          * selects the word, while the rest of the bits select the bit within
 1017          * the word.
 1018          */
 1020         if (ifp->if_flags & IFF_PROMISC)
 1021                 goto allmulti;
af[0] = af[1] = af[2] = af[3] = 0x0000;
ETHER_FIRST_MULTI(step, ac, enm);
 1025         while (enm != NULL) {
 1026                 if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) {
 1027                         /*
 1028                          * We must listen to a range of multicast addresses.
 1029                          * For now, just accept all multicasts, rather than
 1030                          * trying to set only those filter bits needed to match
 1031                          * the range.  (At this time, the only use of address
 1032                          * ranges is for IP multicast routing, for which the
 1033                          * range is big enough to require all bits set.)
 1034                          */
 1035                         goto allmulti;
 1036                 }
crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN) >> 26;
 1040                 /* Set the corresponding bit in the filter. */
af[crc >> 4] |= 1 << (crc & 0xf);
ETHER_NEXT_MULTI(step, enm);
 1044         }
ifp->if_flags &= ~IFF_ALLMULTI;
 1046         return;
allmulti:
ifp->if_flags |= IFF_ALLMULTI;
af[0] = af[1] = af[2] = af[3] = 0xffff;
 1051 }
 1054 /*
 1055  * Routines for accessing the transmit and receive buffers.
 1056  * The various CPU and adapter configurations supported by this
 1057  * driver require three different access methods for buffers
 1058  * and descriptors:
 1059  *      (1) contig (contiguous data; no padding),
 1060  *      (2) gap2 (two bytes of data followed by two bytes of padding),
 1061  *      (3) gap16 (16 bytes of data followed by 16 bytes of padding).
 1062  */
 1064 /*
 1065  * contig: contiguous data with no padding.
 1066  *
 1067  * Buffers may have any alignment.
 1068  */
 1070 void
am7990_copytobuf_contig(sc, from, boff, len)
 1072         struct am7990_softc *sc;
 1073         void *from;
 1074         int boff, len;
 1075 {
 1076         volatile caddr_t buf = sc->sc_mem;
 1078         /*
 1079          * Just call bcopy() to do the work.
 1080          */
bcopy(from, buf + boff, len);
 1082 }
 1084 void
am7990_copyfrombuf_contig(sc, to, boff, len)
 1086         struct am7990_softc *sc;
 1087         void *to;
 1088         int boff, len;
 1089 {
 1090         volatile caddr_t buf = sc->sc_mem;
 1092         /*
 1093          * Just call bcopy() to do the work.
 1094          */
bcopy(buf + boff, to, len);
 1096 }
 1098 void
am7990_zerobuf_contig(sc, boff, len)
 1100         struct am7990_softc *sc;
 1101         int boff, len;
 1102 {
 1103         volatile caddr_t buf = sc->sc_mem;
 1105         /*
 1106          * Just let bzero() do the work
 1107          */
bzero(buf + boff, len);
 1109 }
 1111 #if 0
 1112 /*
 1113  * Examples only; duplicate these and tweak (if necessary) in
 1114  * machine-specific front-ends.
 1115  */
 1117 /*
 1118  * gap2: two bytes of data followed by two bytes of pad.
 1119  *
 1120  * Buffers must be 4-byte aligned.  The code doesn't worry about
 1121  * doing an extra byte.
 1122  */
 1124 void
am7990_copytobuf_gap2(sc, fromv, boff, len)
 1126         struct am7990_softc *sc;
 1127         void *fromv;
 1128         int boff;
 1129         register int len;
 1130 {
 1131         volatile caddr_t buf = sc->sc_mem;
 1132         register caddr_t from = fromv;
 1133         register volatile u_int16_t *bptr;
 1135         if (boff & 0x1) {
 1136                 /* handle unaligned first byte */
bptr = ((volatile u_int16_t *)buf) + (boff - 1);
 1138                 *bptr = (*from++ << 8) | (*bptr & 0xff);
bptr += 2;
len--;
 1141         } else
bptr = ((volatile u_int16_t *)buf) + boff;
 1143         while (len > 1) {
 1144                 *bptr = (from[1] << 8) | (from[0] & 0xff);
bptr += 2;
from += 2;
len -= 2;
 1148         }
 1149         if (len == 1)
 1150                 *bptr = (u_int16_t)*from;
 1151 }
 1153 void
am7990_copyfrombuf_gap2(sc, tov, boff, len)
 1155         struct am7990_softc *sc;
 1156         void *tov;
 1157         int boff, len;
 1158 {
 1159         volatile caddr_t buf = sc->sc_mem;
 1160         register caddr_t to = tov;
 1161         register volatile u_int16_t *bptr;
 1162         register u_int16_t tmp;
 1164         if (boff & 0x1) {
 1165                 /* handle unaligned first byte */
bptr = ((volatile u_int16_t *)buf) + (boff - 1);
 1167                 *to++ = (*bptr >> 8) & 0xff;
bptr += 2;
len--;
 1170         } else
bptr = ((volatile u_int16_t *)buf) + boff;
 1172         while (len > 1) {
tmp = *bptr;
 1174                 *to++ = tmp & 0xff;
 1175                 *to++ = (tmp >> 8) & 0xff;
bptr += 2;
len -= 2;
 1178         }
 1179         if (len == 1)
 1180                 *to = *bptr & 0xff;
 1181 }
 1183 void
am7990_zerobuf_gap2(sc, boff, len)
 1185         struct am7990_softc *sc;
 1186         int boff, len;
 1187 {
 1188         volatile caddr_t buf = sc->sc_mem;
 1189         register volatile u_int16_t *bptr;
 1191         if ((unsigned)boff & 0x1) {
bptr = ((volatile u_int16_t *)buf) + (boff - 1);
 1193                 *bptr &= 0xff;
bptr += 2;
len--;
 1196         } else
bptr = ((volatile u_int16_t *)buf) + boff;
 1198         while (len > 0) {
 1199                 *bptr = 0;
bptr += 2;
len -= 2;
 1202         }
 1203 }
 1205 /*
 1206  * gap16: 16 bytes of data followed by 16 bytes of pad.
 1207  *
 1208  * Buffers must be 32-byte aligned.
 1209  */
 1211 void
am7990_copytobuf_gap16(sc, fromv, boff, len)
 1213         struct am7990_softc *sc;
 1214         void *fromv;
 1215         int boff;
 1216         register int len;
 1217 {
 1218         volatile caddr_t buf = sc->sc_mem;
 1219         register caddr_t from = fromv;
 1220         register caddr_t bptr;
 1221         register int xfer;
bptr = buf + ((boff << 1) & ~0x1f);
boff &= 0xf;
xfer = min(len, 16 - boff);
 1226         while (len > 0) {
bcopy(from, bptr + boff, xfer);
from += xfer;
bptr += 32;
boff = 0;
len -= xfer;
xfer = min(len, 16);
 1233         }
 1234 }
 1236 void
am7990_copyfrombuf_gap16(sc, tov, boff, len)
 1238         struct am7990_softc *sc;
 1239         void *tov;
 1240         int boff, len;
 1241 {
 1242         volatile caddr_t buf = sc->sc_mem;
 1243         register caddr_t to = tov;
 1244         register caddr_t bptr;
 1245         register int xfer;
bptr = buf + ((boff << 1) & ~0x1f);
boff &= 0xf;
xfer = min(len, 16 - boff);
 1250         while (len > 0) {
bcopy(bptr + boff, to, xfer);
to += xfer;
bptr += 32;
boff = 0;
len -= xfer;
xfer = min(len, 16);
 1257         }
 1258 }
 1260 void
am7990_zerobuf_gap16(sc, boff, len)
 1262         struct am7990_softc *sc;
 1263         int boff, len;
 1264 {
 1265         volatile caddr_t buf = sc->sc_mem;
 1266         register caddr_t bptr;
 1267         register int xfer;
bptr = buf + ((boff << 1) & ~0x1f);
boff &= 0xf;
xfer = min(len, 16 - boff);
 1272         while (len > 0) {
bzero(bptr + boff, xfer);
bptr += 32;
boff = 0;
len -= xfer;
xfer = min(len, 16);
 1278         }
 1279 }
 1280 #endif /* Example only */