2 /* $NecBSD: dp83932.c,v 1.5 1999/07/29 05:08:44 kmatsuda Exp $ */
3 /* $NetBSD: if_snc.c,v 1.18 1998/04/25 21:27:40 scottr Exp $ */
6 * Copyright (c) 1997, 1998, 1999
7 * Kouichi Matsuda. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Kouichi Matsuda for
21 * 4. The name of the author may not be used to endorse or promote products
22 * derived from this software without specific prior written permission
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * Modified for FreeBSD(98) 4.0 from NetBSD/pc98 1.4.2 by Motomichi Matsuzaki.
41 * Modified for NetBSD/pc98 1.2G from NetBSD/mac68k 1.2G by Kouichi Matsuda.
42 * Make adapted for NEC PC-9801-83, 84, PC-9801-103, 104, PC-9801N-25 and
43 * PC-9801N-J02, J02R, which uses National Semiconductor DP83934AVQB as
44 * Ethernet Controller and National Semiconductor NS46C46 as
45 * (64 * 16 bits) Microwire Serial EEPROM.
49 * National Semiconductor DP8393X SONIC Driver
50 * Copyright (c) 1991 Algorithmics Ltd (http://www.algor.co.uk)
51 * You may use, copy, and modify this program so long as you retain the
54 * This driver has been substantially modified since Algorithmics donated
57 * Denton Gentry <denny1@home.com>
59 * Yanagisawa Takeshi <yanagisw@aa.ap.titech.ac.jp>
60 * did the work to get this running on the Macintosh.
65 #include <sys/param.h>
66 #include <sys/systm.h>
67 #include <sys/sockio.h>
69 #include <sys/protosw.h>
70 #include <sys/socket.h>
71 #include <sys/syslog.h>
72 #include <sys/errno.h>
77 #include <net/ethernet.h>
79 #include <net/if_arp.h>
80 #include <net/if_dl.h>
81 #include <net/if_media.h>
86 #include <machine/bus.h>
87 #include <dev/snc/dp83932reg.h>
88 #include <dev/snc/dp83932var.h>
90 hide void sncwatchdog(struct ifnet *);
91 hide void sncinit(void *);
92 hide int sncstop(struct snc_softc *sc);
93 hide int sncioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
94 hide void sncstart(struct ifnet *ifp);
95 hide void sncreset(struct snc_softc *sc);
97 hide void caminitialise(struct snc_softc *);
98 hide void camentry(struct snc_softc *, int, u_char *ea);
99 hide void camprogram(struct snc_softc *);
100 hide void initialise_tda(struct snc_softc *);
101 hide void initialise_rda(struct snc_softc *);
102 hide void initialise_rra(struct snc_softc *);
104 hide void camdump(struct snc_softc *sc);
107 hide void sonictxint(struct snc_softc *);
108 hide void sonicrxint(struct snc_softc *);
110 hide u_int sonicput(struct snc_softc *sc, struct mbuf *m0, int mtd_next);
111 hide int sonic_read(struct snc_softc *, u_int32_t, int);
112 hide struct mbuf *sonic_get(struct snc_softc *, u_int32_t, int);
114 int snc_enable(struct snc_softc *);
115 void snc_disable(struct snc_softc *);
117 int snc_mediachange(struct ifnet *);
118 void snc_mediastatus(struct ifnet *, struct ifmediareq *);
122 struct cfdriver snc_cd = {
123 NULL, "snc", DV_IFNET
132 #define assert(e) ((void)0)
133 #define _assert(e) ((void)0)
135 #define _assert(e) assert(e)
137 #define assert(e) ((e) ? (void)0 : __assert("snc ", __FILE__, __LINE__, #e))
139 #define assert(e) ((e) ? (void)0 : __assert("snc "__FILE__, __LINE__, "e"))
144 #define SNC_SHOWTXHDR 0x01 /* show tx ether_header */
145 #define SNC_SHOWRXHDR 0x02 /* show rx ether_header */
146 #define SNC_SHOWCAMENT 0x04 /* show CAM entry */
147 #endif /* SNCDEBUG */
152 sncconfig(sc, media, nmedia, defmedia, myea)
153 struct snc_softc *sc;
154 int *media, nmedia, defmedia;
157 struct ifnet *ifp = &sc->sc_if;
161 if ((sncdebug & SNC_SHOWCAMENT) != 0) {
167 device_printf(sc->sc_dev,
168 "buffers: rra=0x%x cda=0x%x rda=0x%x tda=0x%x\n",
169 sc->v_rra[0], sc->v_cda,
170 sc->v_rda, sc->mtda[0].mtd_vtxp);
174 if_initname(ifp, device_get_name(sc->sc_dev),
175 device_get_unit(sc->sc_dev));
176 ifp->if_ioctl = sncioctl;
177 ifp->if_start = sncstart;
179 IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST | IFF_NEEDSGIANT;
180 ifp->if_watchdog = sncwatchdog;
181 ifp->if_init = sncinit;
182 ifp->if_mtu = ETHERMTU;
183 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
184 bcopy(myea, sc->sc_ethercom.ac_enaddr, ETHER_ADDR_LEN);
186 /* Initialize media goo. */
187 ifmedia_init(&sc->sc_media, 0, snc_mediachange,
190 for (i = 0; i < nmedia; i++)
191 ifmedia_add(&sc->sc_media, media[i], 0, NULL);
192 ifmedia_set(&sc->sc_media, defmedia);
194 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL);
195 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL);
198 ether_ifattach(ifp, myea);
201 rnd_attach_source(&sc->rnd_source, device_get_nameunit(sc->sc_dev),
211 sncstop((struct snc_softc *)arg);
215 * Media change callback.
221 struct snc_softc *sc = ifp->if_softc;
223 if (sc->sc_mediachange)
224 return ((*sc->sc_mediachange)(sc));
229 * Media status callback.
232 snc_mediastatus(ifp, ifmr)
234 struct ifmediareq *ifmr;
236 struct snc_softc *sc = ifp->if_softc;
238 if (sc->sc_enabled == 0) {
239 ifmr->ifm_active = IFM_ETHER | IFM_NONE;
240 ifmr->ifm_status = 0;
244 if (sc->sc_mediastatus)
245 (*sc->sc_mediastatus)(sc, ifmr);
250 sncioctl(ifp, cmd, data)
256 struct snc_softc *sc = ifp->if_softc;
257 int s = splhardnet(), err = 0;
263 if ((ifp->if_flags & IFF_UP) == 0 &&
264 (ifp->if_flags & IFF_RUNNING) != 0) {
266 * If interface is marked down and it is running,
270 ifp->if_flags &= ~IFF_RUNNING;
272 } else if ((ifp->if_flags & IFF_UP) != 0 &&
273 (ifp->if_flags & IFF_RUNNING) == 0) {
275 * If interface is marked up and it is stopped,
278 if ((err = snc_enable(sc)) != 0)
281 } else if (sc->sc_enabled) {
283 * reset the interface to pick up any other changes
286 temp = ifp->if_flags & IFF_UP;
288 ifp->if_flags |= temp;
295 if (sc->sc_enabled == 0) {
299 temp = ifp->if_flags & IFF_UP;
301 ifp->if_flags |= temp;
306 ifr = (struct ifreq *) data;
307 err = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
310 err = ether_ioctl(ifp, cmd, data);
318 * Encapsulate a packet of type family for the local net.
324 struct snc_softc *sc = ifp->if_softc;
328 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
332 /* Check for room in the xmit buffer. */
333 if ((mtd_next = (sc->mtd_free + 1)) == NTDA)
336 if (mtd_next == sc->mtd_hw) {
337 ifp->if_flags |= IFF_OACTIVE;
341 IF_DEQUEUE(&ifp->if_snd, m);
345 /* We need the header for m_pkthdr.len. */
349 * If bpf is listening on this interface, let it
350 * see the packet before we commit it to the wire.
355 * If there is nothing in the o/p queue, and there is room in
356 * the Tx ring, then send the packet directly. Otherwise append
357 * it to the o/p queue.
359 if ((sonicput(sc, m, mtd_next)) == 0) {
360 IF_PREPEND(&ifp->if_snd, m);
364 sc->mtd_prev = sc->mtd_free;
365 sc->mtd_free = mtd_next;
367 ifp->if_opackets++; /* # of pkts */
369 /* Jump back for possibly more punishment. */
374 * reset and restart the SONIC. Called in case of fatal
375 * hardware/software errors.
379 struct snc_softc *sc;
389 struct snc_softc *sc = xsc;
393 if (sc->sc_if.if_flags & IFF_RUNNING)
394 /* already running */
399 NIC_PUT(sc, SNCR_CR, CR_RST); /* DCR only accessable in reset mode! */
402 NIC_PUT(sc, SNCR_DCR, (sc->sncr_dcr |
403 (sc->bitmode ? DCR_DW32 : DCR_DW16)));
404 NIC_PUT(sc, SNCR_DCR2, sc->sncr_dcr2);
406 s_rcr = RCR_BRD | RCR_LBNONE;
407 if (sc->sc_if.if_flags & IFF_PROMISC)
409 if (sc->sc_if.if_flags & IFF_ALLMULTI)
411 NIC_PUT(sc, SNCR_RCR, s_rcr);
413 NIC_PUT(sc, SNCR_IMR, (IMR_PRXEN | IMR_PTXEN | IMR_TXEREN | IMR_LCDEN));
415 /* clear pending interrupts */
416 NIC_PUT(sc, SNCR_ISR, ISR_ALL);
418 /* clear tally counters */
419 NIC_PUT(sc, SNCR_CRCT, -1);
420 NIC_PUT(sc, SNCR_FAET, -1);
421 NIC_PUT(sc, SNCR_MPT, -1);
427 /* enable the chip */
428 NIC_PUT(sc, SNCR_CR, 0);
431 /* program the CAM */
434 /* get it to read resource descriptors */
435 NIC_PUT(sc, SNCR_CR, CR_RRRA);
437 while ((NIC_GET(sc, SNCR_CR)) & CR_RRRA)
441 NIC_PUT(sc, SNCR_CR, CR_RXEN);
444 /* flag interface as "running" */
445 sc->sc_if.if_flags |= IFF_RUNNING;
446 sc->sc_if.if_flags &= ~IFF_OACTIVE;
453 * close down an interface and free its buffers
454 * Called on final close of device, or if sncinit() fails
459 struct snc_softc *sc;
462 int s = splhardnet();
464 /* stick chip in reset */
465 NIC_PUT(sc, SNCR_CR, CR_RST);
468 /* free all receive buffers (currently static so nothing to do) */
470 /* free all pending transmit mbufs */
471 while (sc->mtd_hw != sc->mtd_free) {
472 mtd = &sc->mtda[sc->mtd_hw];
474 m_freem(mtd->mtd_mbuf);
475 if (++sc->mtd_hw == NTDA) sc->mtd_hw = 0;
478 sc->sc_if.if_timer = 0;
479 sc->sc_if.if_flags &= ~(IFF_RUNNING | IFF_UP);
486 * Called if any Tx packets remain unsent after 5 seconds,
487 * In all cases we just reset the chip, and any retransmission
488 * will be handled by higher level protocol timeouts.
494 struct snc_softc *sc = ifp->if_softc;
498 if (sc->mtd_hw != sc->mtd_free) {
499 /* something still pending for transmit */
500 mtd = &sc->mtda[sc->mtd_hw];
501 if (SRO(sc, mtd->mtd_vtxp, TXP_STATUS) == 0)
502 log(LOG_ERR, "%s: Tx - timeout\n",
503 device_get_nameunit(sc->sc_dev));
505 log(LOG_ERR, "%s: Tx - lost interrupt\n",
506 device_get_nameunit(sc->sc_dev));
507 temp = ifp->if_flags & IFF_UP;
509 ifp->if_flags |= temp;
514 * stuff packet into sonic (at splnet)
517 sonicput(sc, m0, mtd_next)
518 struct snc_softc *sc;
529 #ifdef whyonearthwouldyoudothis
530 if (NIC_GET(sc, SNCR_CR) & CR_TXP)
534 /* grab the replacement mtd */
535 mtdp = &sc->mtda[sc->mtd_free];
537 buff = mtdp->mtd_vbuf;
539 /* this packet goes to mtdnext fill in the TDA */
541 txp = mtdp->mtd_vtxp;
543 /* Write to the config word. Every (NTDA/2)+1 packets we set an intr */
544 if (sc->mtd_pint == 0) {
545 sc->mtd_pint = NTDA/2;
546 SWO(sc, txp, TXP_CONFIG, TCR_PINT);
549 SWO(sc, txp, TXP_CONFIG, 0);
552 for (m = m0; m; m = m->m_next) {
555 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), buff, len);
558 if (totlen >= TXBSIZE) {
559 panic("%s: sonicput: packet overflow",
560 device_get_nameunit(sc->sc_dev));
563 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRLO,
564 LOWER(mtdp->mtd_vbuf));
565 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRHI,
566 UPPER(mtdp->mtd_vbuf));
568 if (totlen < ETHERMIN + sizeof(struct ether_header)) {
569 int pad = ETHERMIN + sizeof(struct ether_header) - totlen;
570 (*sc->sc_zerobuf)(sc, mtdp->mtd_vbuf + totlen, pad);
571 totlen = ETHERMIN + sizeof(struct ether_header);
574 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FSIZE,
576 SWO(sc, txp, TXP_FRAGCNT, 1);
577 SWO(sc, txp, TXP_PKTSIZE, totlen);
579 /* link onto the next mtd that will be used */
580 SWO(sc, txp, TXP_FRAGOFF + (1 * TXP_FRAGSIZE) + TXP_FPTRLO,
581 LOWER(sc->mtda[mtd_next].mtd_vtxp) | EOL);
584 * The previous txp.tlink currently contains a pointer to
585 * our txp | EOL. Want to clear the EOL, so write our
586 * pointer to the previous txp.
588 SWO(sc, sc->mtda[sc->mtd_prev].mtd_vtxp, sc->mtd_tlinko,
589 LOWER(mtdp->mtd_vtxp));
591 /* make sure chip is running */
593 NIC_PUT(sc, SNCR_CR, CR_TXP);
595 sc->sc_if.if_timer = 5; /* 5 seconds to watch for failing to transmit */
601 * These are called from sonicioctl() when /etc/ifconfig is run to set
602 * the address or switch the i/f on.
609 struct snc_softc *sc;
611 u_int32_t v_cda = sc->v_cda;
615 for (i = 0; i < MAXCAM; i++) {
616 camoffset = i * CDA_CAMDESC;
617 SWO(sc, v_cda, (camoffset + CDA_CAMEP), i);
618 SWO(sc, v_cda, (camoffset + CDA_CAMAP2), 0);
619 SWO(sc, v_cda, (camoffset + CDA_CAMAP1), 0);
620 SWO(sc, v_cda, (camoffset + CDA_CAMAP0), 0);
622 SWO(sc, v_cda, CDA_ENABLE, 0);
625 if ((sncdebug & SNC_SHOWCAMENT) != 0) {
632 camentry(sc, entry, ea)
635 struct snc_softc *sc;
637 u_int32_t v_cda = sc->v_cda;
638 int camoffset = entry * CDA_CAMDESC;
640 SWO(sc, v_cda, camoffset + CDA_CAMEP, entry);
641 SWO(sc, v_cda, camoffset + CDA_CAMAP2, (ea[5] << 8) | ea[4]);
642 SWO(sc, v_cda, camoffset + CDA_CAMAP1, (ea[3] << 8) | ea[2]);
643 SWO(sc, v_cda, camoffset + CDA_CAMAP0, (ea[1] << 8) | ea[0]);
644 SWO(sc, v_cda, CDA_ENABLE,
645 (SRO(sc, v_cda, CDA_ENABLE) | (1 << entry)));
650 struct snc_softc *sc;
652 struct ifmultiaddr *ifma;
661 /* Always load our own address first. */
662 camentry (sc, mcount, sc->sc_ethercom.ac_enaddr);
665 /* Assume we won't need allmulti bit. */
666 ifp->if_flags &= ~IFF_ALLMULTI;
668 /* Loop through multicast addresses */
669 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
670 if (ifma->ifma_addr->sa_family != AF_LINK)
672 if (mcount == MAXCAM) {
673 ifp->if_flags |= IFF_ALLMULTI;
677 /* program the CAM with the specified entry */
679 LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
683 NIC_PUT(sc, SNCR_CDP, LOWER(sc->v_cda));
684 NIC_PUT(sc, SNCR_CDC, MAXCAM);
685 NIC_PUT(sc, SNCR_CR, CR_LCAM);
689 while ((NIC_GET(sc, SNCR_CR) & CR_LCAM) && timeout--)
693 panic("%s: CAM initialisation failed\n",
694 device_get_nameunit(sc->sc_dev));
697 while (((NIC_GET(sc, SNCR_ISR) & ISR_LCD) == 0) && timeout--)
700 if (NIC_GET(sc, SNCR_ISR) & ISR_LCD)
701 NIC_PUT(sc, SNCR_ISR, ISR_LCD);
703 device_printf(sc->sc_dev,
704 "CAM initialisation without interrupt\n");
710 struct snc_softc *sc;
714 printf("CAM entries:\n");
715 NIC_PUT(sc, SNCR_CR, CR_RST);
718 for (i = 0; i < 16; i++) {
719 u_short ap2, ap1, ap0;
720 NIC_PUT(sc, SNCR_CEP, i);
722 ap2 = NIC_GET(sc, SNCR_CAP2);
723 ap1 = NIC_GET(sc, SNCR_CAP1);
724 ap0 = NIC_GET(sc, SNCR_CAP0);
725 printf("%d: ap2=0x%x ap1=0x%x ap0=0x%x\n", i, ap2, ap1, ap0);
727 printf("CAM enable 0x%x\n", NIC_GET(sc, SNCR_CEP));
729 NIC_PUT(sc, SNCR_CR, 0);
736 struct snc_softc *sc;
741 for (i = 0; i < NTDA; i++) {
747 sc->mtd_prev = NTDA - 1;
749 sc->mtd_tlinko = TXP_FRAGOFF + 1*TXP_FRAGSIZE + TXP_FPTRLO;
750 sc->mtd_pint = NTDA/2;
752 NIC_PUT(sc, SNCR_UTDA, UPPER(sc->mtda[0].mtd_vtxp));
753 NIC_PUT(sc, SNCR_CTDA, LOWER(sc->mtda[0].mtd_vtxp));
758 struct snc_softc *sc;
761 u_int32_t vv_rda = 0;
764 /* link the RDA's together into a circular list */
765 for (i = 0; i < (sc->sc_nrda - 1); i++) {
766 v_rda = sc->v_rda + (i * RXPKT_SIZE(sc));
767 vv_rda = sc->v_rda + ((i+1) * RXPKT_SIZE(sc));
768 SWO(sc, v_rda, RXPKT_RLINK, LOWER(vv_rda));
769 SWO(sc, v_rda, RXPKT_INUSE, 1);
771 v_rda = sc->v_rda + ((sc->sc_nrda - 1) * RXPKT_SIZE(sc));
772 SWO(sc, v_rda, RXPKT_RLINK, LOWER(sc->v_rda) | EOL);
773 SWO(sc, v_rda, RXPKT_INUSE, 1);
775 /* mark end of receive descriptor list */
776 sc->sc_rdamark = sc->sc_nrda - 1;
780 NIC_PUT(sc, SNCR_URDA, UPPER(sc->v_rda));
781 NIC_PUT(sc, SNCR_CRDA, LOWER(sc->v_rda));
787 struct snc_softc *sc;
791 int bitmode = sc->bitmode;
794 NIC_PUT(sc, SNCR_EOBC, RBASIZE(sc) / 2 - 2);
796 NIC_PUT(sc, SNCR_EOBC, RBASIZE(sc) / 2 - 1);
798 NIC_PUT(sc, SNCR_URRA, UPPER(sc->v_rra[0]));
799 NIC_PUT(sc, SNCR_RSA, LOWER(sc->v_rra[0]));
800 /* rea must point just past the end of the rra space */
801 NIC_PUT(sc, SNCR_REA, LOWER(sc->v_rea));
802 NIC_PUT(sc, SNCR_RRP, LOWER(sc->v_rra[0]));
803 NIC_PUT(sc, SNCR_RSC, 0);
805 /* fill up SOME of the rra with buffers */
806 for (i = 0; i < NRBA; i++) {
807 v = SONIC_GETDMA(sc->rbuf[i]);
808 SWO(sc, sc->v_rra[i], RXRSRC_PTRHI, UPPER(v));
809 SWO(sc, sc->v_rra[i], RXRSRC_PTRLO, LOWER(v));
810 SWO(sc, sc->v_rra[i], RXRSRC_WCHI, UPPER(NBPG/2));
811 SWO(sc, sc->v_rra[i], RXRSRC_WCLO, LOWER(NBPG/2));
813 sc->sc_rramark = NRBA;
814 NIC_PUT(sc, SNCR_RWP, LOWER(sc->v_rra[sc->sc_rramark]));
822 struct snc_softc *sc = (struct snc_softc *)arg;
825 if (sc->sc_enabled == 0)
828 while ((isr = (NIC_GET(sc, SNCR_ISR) & ISR_ALL)) != 0) {
829 /* scrub the interrupts that we are going to service */
830 NIC_PUT(sc, SNCR_ISR, isr);
833 if (isr & (ISR_BR | ISR_LCD | ISR_TC))
834 device_printf(sc->sc_dev,
835 "unexpected interrupt status 0x%x\n",
838 if (isr & (ISR_TXDN | ISR_TXER | ISR_PINT))
844 if (isr & (ISR_HBL | ISR_RDE | ISR_RBE | ISR_RBAE | ISR_RFO)) {
847 * The repeater is not providing a heartbeat.
848 * In itself this isn't harmful, lots of the
849 * cheap repeater hubs don't supply a heartbeat.
850 * So ignore the lack of heartbeat. Its only
851 * if we can't detect a carrier that we have a
856 device_printf(sc->sc_dev,
857 "receive descriptors exhausted\n");
859 device_printf(sc->sc_dev,
860 "receive buffers exhausted\n");
862 device_printf(sc->sc_dev,
863 "receive buffer area exhausted\n");
865 device_printf(sc->sc_dev,
866 "receive FIFO overrun\n");
868 if (isr & (ISR_CRC | ISR_FAE | ISR_MP)) {
878 sncstart(&sc->sc_if);
882 rnd_add_uint32(&sc->rnd_source, isr);
889 * Transmit interrupt routine
893 struct snc_softc *sc;
897 unsigned short txp_status;
899 struct ifnet *ifp = &sc->sc_if;
903 if (mtd_hw == sc->mtd_free)
906 while (mtd_hw != sc->mtd_free) {
907 mtd = &sc->mtda[mtd_hw];
911 if (SRO(sc, txp, TXP_STATUS) == 0) {
912 break; /* it hasn't really gone yet */
916 if ((sncdebug & SNC_SHOWTXHDR) != 0)
918 struct ether_header eh;
920 (*sc->sc_copyfrombuf)(sc, &eh, mtd->mtd_vbuf, sizeof(eh));
921 device_printf(sc->sc_dev,
922 "xmit status=0x%x len=%d type=0x%x from %6D",
923 SRO(sc, txp, TXP_STATUS),
924 SRO(sc, txp, TXP_PKTSIZE),
925 htons(eh.ether_type),
926 eh.ether_shost, ":");
927 printf(" (to %6D)\n", eh.ether_dhost, ":");
929 #endif /* SNCDEBUG */
931 ifp->if_flags &= ~IFF_OACTIVE;
933 if (mtd->mtd_mbuf != 0) {
934 m_freem(mtd->mtd_mbuf);
937 if (++mtd_hw == NTDA) mtd_hw = 0;
939 txp_status = SRO(sc, txp, TXP_STATUS);
941 ifp->if_collisions += (txp_status & TCR_EXC) ? 16 :
942 ((txp_status & TCR_NC) >> 12);
944 if ((txp_status & TCR_PTX) == 0) {
946 device_printf(sc->sc_dev, "Tx packet status=0x%x\n",
949 /* XXX - DG This looks bogus */
950 if (mtd_hw != sc->mtd_free) {
951 printf("resubmitting remaining packets\n");
952 mtd = &sc->mtda[mtd_hw];
953 NIC_PUT(sc, SNCR_CTDA, LOWER(mtd->mtd_vtxp));
954 NIC_PUT(sc, SNCR_CR, CR_TXP);
966 * Receive interrupt routine
970 struct snc_softc *sc;
979 rda = sc->v_rda + (sc->sc_rxmark * RXPKT_SIZE(sc));
981 while (SRO(sc, rda, RXPKT_INUSE) == 0) {
982 u_int status = SRO(sc, rda, RXPKT_STATUS);
984 orra = RBASEQ(SRO(sc, rda, RXPKT_SEQNO)) & RRAMASK;
985 rxpkt_ptr = SRO(sc, rda, RXPKT_PTRLO);
987 * Do not trunc ether_header length.
988 * Our sonic_read() and sonic_get() require it.
990 len = SRO(sc, rda, RXPKT_BYTEC) - FCSSIZE;
991 if (status & RCR_PRX) {
992 /* XXX: Does PGOFSET require? */
994 sc->rbuf[orra & RBAMASK] + (rxpkt_ptr & PGOFSET);
995 if (sonic_read(sc, pkt, len))
996 sc->sc_if.if_ipackets++;
998 sc->sc_if.if_ierrors++;
1000 sc->sc_if.if_ierrors++;
1003 * give receive buffer area back to chip.
1005 * If this was the last packet in the RRA, give the RRA to
1007 * If sonic read didnt copy it out then we would have to
1009 * (dont bother add it back in again straight away)
1011 * Really, we're doing v_rra[rramark] = v_rra[orra] but
1012 * we have to use the macros because SONIC might be in
1013 * 16 or 32 bit mode.
1015 if (status & RCR_LPKT) {
1016 u_int32_t tmp1, tmp2;
1018 rramark = sc->sc_rramark;
1019 tmp1 = sc->v_rra[rramark];
1020 tmp2 = sc->v_rra[orra];
1021 SWO(sc, tmp1, RXRSRC_PTRLO,
1022 SRO(sc, tmp2, RXRSRC_PTRLO));
1023 SWO(sc, tmp1, RXRSRC_PTRHI,
1024 SRO(sc, tmp2, RXRSRC_PTRHI));
1025 SWO(sc, tmp1, RXRSRC_WCLO,
1026 SRO(sc, tmp2, RXRSRC_WCLO));
1027 SWO(sc, tmp1, RXRSRC_WCHI,
1028 SRO(sc, tmp2, RXRSRC_WCHI));
1030 /* zap old rra for fun */
1031 SWO(sc, tmp2, RXRSRC_WCHI, 0);
1032 SWO(sc, tmp2, RXRSRC_WCLO, 0);
1034 sc->sc_rramark = (++rramark) & RRAMASK;
1035 NIC_PUT(sc, SNCR_RWP, LOWER(sc->v_rra[rramark]));
1040 * give receive descriptor back to chip simple
1043 rdamark = sc->sc_rdamark;
1044 SWO(sc, rda, RXPKT_INUSE, 1);
1045 SWO(sc, rda, RXPKT_RLINK,
1046 SRO(sc, rda, RXPKT_RLINK) | EOL);
1047 SWO(sc, (sc->v_rda + (rdamark * RXPKT_SIZE(sc))), RXPKT_RLINK,
1048 SRO(sc, (sc->v_rda + (rdamark * RXPKT_SIZE(sc))),
1049 RXPKT_RLINK) & ~EOL);
1050 sc->sc_rdamark = sc->sc_rxmark;
1052 if (++sc->sc_rxmark >= sc->sc_nrda)
1054 rda = sc->v_rda + (sc->sc_rxmark * RXPKT_SIZE(sc));
1059 * sonic_read -- pull packet off interface and forward to
1060 * appropriate protocol handler
1063 sonic_read(sc, pkt, len)
1064 struct snc_softc *sc;
1068 struct ifnet *ifp = &sc->sc_if;
1069 struct ether_header *et;
1072 if (len <= sizeof(struct ether_header) ||
1073 len > ETHERMTU + sizeof(struct ether_header)) {
1074 device_printf(sc->sc_dev,
1075 "invalid packet length %d bytes\n", len);
1079 /* Pull packet off interface. */
1080 m = sonic_get(sc, pkt, len);
1085 /* We assume that the header fit entirely in one mbuf. */
1086 et = mtod(m, struct ether_header *);
1089 if ((sncdebug & SNC_SHOWRXHDR) != 0)
1091 device_printf(sc->sc_dev, "rcvd 0x%x len=%d type=0x%x from %6D",
1092 pkt, len, htons(et->ether_type),
1093 et->ether_shost, ":");
1094 printf(" (to %6D)\n", et->ether_dhost, ":");
1096 #endif /* SNCDEBUG */
1098 /* Pass the packet up. */
1099 (*ifp->if_input)(ifp, m);
1105 * munge the received packet into an mbuf chain
1108 sonic_get(sc, pkt, datalen)
1109 struct snc_softc *sc;
1113 struct mbuf *m, *top, **mp;
1116 * Do not trunc ether_header length.
1117 * Our sonic_read() and sonic_get() require it.
1120 MGETHDR(m, M_DONTWAIT, MT_DATA);
1123 m->m_pkthdr.rcvif = &sc->sc_if;
1124 m->m_pkthdr.len = datalen;
1129 while (datalen > 0) {
1131 MGET(m, M_DONTWAIT, MT_DATA);
1138 if (datalen >= MINCLSIZE) {
1139 MCLGET(m, M_DONTWAIT);
1140 if ((m->m_flags & M_EXT) == 0) {
1141 if (top) m_freem(top);
1150 ALIGN(sizeof(struct ether_header)) -
1151 sizeof(struct ether_header);
1156 m->m_len = len = min(datalen, len);
1158 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), pkt, len);
1168 * Enable power on the interface.
1172 struct snc_softc *sc;
1176 device_printf(sc->sc_dev, "snc_enable()\n");
1177 #endif /* SNCDEBUG */
1179 if (sc->sc_enabled == 0 && sc->sc_enable != NULL) {
1180 if ((*sc->sc_enable)(sc) != 0) {
1181 device_printf(sc->sc_dev, "device enable failed\n");
1191 * Disable power on the interface.
1195 struct snc_softc *sc;
1199 device_printf(sc->sc_dev, "snc_disable()\n");
1200 #endif /* SNCDEBUG */
1202 if (sc->sc_enabled != 0 && sc->sc_disable != NULL) {
1203 (*sc->sc_disable)(sc);