1 /* $FreeBSD: src/sys/dev/snc/dp83932.c,v 1.1.2.2 2003/02/11 08:52:00 nyan Exp $ */
2 /* $DragonFly: src/sys/dev/netif/snc/Attic/dp83932.c,v 1.16 2005/06/20 15:10:41 joerg Exp $ */
3 /* $NecBSD: dp83932.c,v 1.5 1999/07/29 05:08:44 kmatsuda Exp $ */
4 /* $NetBSD: if_snc.c,v 1.18 1998/04/25 21:27:40 scottr Exp $ */
7 * Copyright (c) 1997, 1998, 1999
8 * Kouichi Matsuda. All rights reserved.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by Kouichi Matsuda for
22 * 4. The name of the author may not be used to endorse or promote products
23 * derived from this software without specific prior written permission
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 * Modified for FreeBSD(98) 4.0 from NetBSD/pc98 1.4.2 by Motomichi Matsuzaki.
42 * Modified for NetBSD/pc98 1.2G from NetBSD/mac68k 1.2G by Kouichi Matsuda.
43 * Make adapted for NEC PC-9801-83, 84, PC-9801-103, 104, PC-9801N-25 and
44 * PC-9801N-J02, J02R, which uses National Semiconductor DP83934AVQB as
45 * Ethernet Controller and National Semiconductor NS46C46 as
46 * (64 * 16 bits) Microwire Serial EEPROM.
50 * National Semiconductor DP8393X SONIC Driver
51 * Copyright (c) 1991 Algorithmics Ltd (http://www.algor.co.uk)
52 * You may use, copy, and modify this program so long as you retain the
55 * This driver has been substantially modified since Algorithmics donated
58 * Denton Gentry <denny1@home.com>
60 * Yanagisawa Takeshi <yanagisw@aa.ap.titech.ac.jp>
61 * did the work to get this running on the Macintosh.
66 #include <sys/param.h>
67 #include <sys/systm.h>
68 #include <sys/sockio.h>
70 #include <sys/protosw.h>
71 #include <sys/socket.h>
72 #include <sys/syslog.h>
73 #include <sys/errno.h>
74 #include <sys/thread2.h>
79 #include <net/ethernet.h>
81 #include <net/ifq_var.h>
82 #include <net/if_arp.h>
83 #include <net/if_dl.h>
84 #include <net/if_types.h>
85 #include <net/if_media.h>
88 #include <netinet/in.h>
89 #include <netinet/in_systm.h>
90 #include <netinet/in_var.h>
91 #include <netinet/ip.h>
95 #include <net/bpfdesc.h>
98 #include <machine/bus.h>
99 #include "dp83932reg.h"
100 #include "dp83932var.h"
102 hide void sncwatchdog (struct ifnet *);
103 hide void sncinit (void *);
104 hide int sncstop (struct snc_softc *sc);
105 hide int sncioctl (struct ifnet *ifp, u_long cmd, caddr_t data,
107 hide void sncstart (struct ifnet *ifp);
108 hide void sncreset (struct snc_softc *sc);
110 hide void caminitialise (struct snc_softc *);
111 hide void camentry (struct snc_softc *, int, u_char *ea);
112 hide void camprogram (struct snc_softc *);
113 hide void initialise_tda (struct snc_softc *);
114 hide void initialise_rda (struct snc_softc *);
115 hide void initialise_rra (struct snc_softc *);
117 hide void camdump (struct snc_softc *sc);
120 hide void sonictxint (struct snc_softc *);
121 hide void sonicrxint (struct snc_softc *);
123 hide u_int sonicput (struct snc_softc *sc, struct mbuf *m0,
125 hide int sonic_read (struct snc_softc *, u_int32_t, int);
126 hide struct mbuf *sonic_get (struct snc_softc *,
129 int snc_enable (struct snc_softc *);
130 void snc_disable (struct snc_softc *);
132 int snc_mediachange (struct ifnet *);
133 void snc_mediastatus (struct ifnet *, struct ifmediareq *);
137 struct cfdriver snc_cd = {
138 NULL, "snc", DV_IFNET
147 #define assert(e) ((void)0)
148 #define _assert(e) ((void)0)
150 #define _assert(e) assert(e)
152 #define assert(e) ((e) ? (void)0 : __assert("snc ", __FILE__, __LINE__, #e))
154 #define assert(e) ((e) ? (void)0 : __assert("snc "__FILE__, __LINE__, "e"))
159 #define SNC_SHOWTXHDR 0x01 /* show tx ether_header */
160 #define SNC_SHOWRXHDR 0x02 /* show rx ether_header */
161 #define SNC_SHOWCAMENT 0x04 /* show CAM entry */
162 #endif /* SNCDEBUG */
167 sncconfig(sc, media, nmedia, defmedia, eaddr)
168 struct snc_softc *sc;
169 int *media, nmedia, defmedia;
172 struct ifnet *ifp = &sc->sc_if;
176 if ((sncdebug & SNC_SHOWCAMENT) != 0) {
182 device_printf(sc->sc_dev,
183 "buffers: rra=0x%x cda=0x%x rda=0x%x tda=0x%x\n",
184 sc->v_rra[0], sc->v_cda,
185 sc->v_rda, sc->mtda[0].mtd_vtxp);
189 if_initname(ifp, "snc", device_get_unit(sc->sc_dev));
190 ifp->if_ioctl = sncioctl;
191 ifp->if_start = sncstart;
193 IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
194 ifp->if_watchdog = sncwatchdog;
195 ifp->if_init = sncinit;
196 ifp->if_mtu = ETHERMTU;
197 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
198 ifq_set_ready(&ifp->if_snd);
200 /* Initialize media goo. */
201 ifmedia_init(&sc->sc_media, 0, snc_mediachange,
204 for (i = 0; i < nmedia; i++)
205 ifmedia_add(&sc->sc_media, media[i], 0, NULL);
206 ifmedia_set(&sc->sc_media, defmedia);
208 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL);
209 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL);
212 ether_ifattach(ifp, eaddr);
215 rnd_attach_source(&sc->rnd_source, device_get_nameunit(sc->sc_dev),
225 sncstop((struct snc_softc *)arg);
229 * Media change callback.
235 struct snc_softc *sc = ifp->if_softc;
237 if (sc->sc_mediachange)
238 return ((*sc->sc_mediachange)(sc));
243 * Media status callback.
246 snc_mediastatus(ifp, ifmr)
248 struct ifmediareq *ifmr;
250 struct snc_softc *sc = ifp->if_softc;
252 if (sc->sc_enabled == 0) {
253 ifmr->ifm_active = IFM_ETHER | IFM_NONE;
254 ifmr->ifm_status = 0;
258 if (sc->sc_mediastatus)
259 (*sc->sc_mediastatus)(sc, ifmr);
264 sncioctl(ifp, cmd, data, cr)
271 struct snc_softc *sc = ifp->if_softc;
278 if ((ifp->if_flags & IFF_UP) == 0 &&
279 (ifp->if_flags & IFF_RUNNING) != 0) {
281 * If interface is marked down and it is running,
285 ifp->if_flags &= ~IFF_RUNNING;
287 } else if ((ifp->if_flags & IFF_UP) != 0 &&
288 (ifp->if_flags & IFF_RUNNING) == 0) {
290 * If interface is marked up and it is stopped,
293 if ((err = snc_enable(sc)) != 0)
296 } else if (sc->sc_enabled) {
298 * reset the interface to pick up any other changes
301 temp = ifp->if_flags & IFF_UP;
303 ifp->if_flags |= temp;
310 if (sc->sc_enabled == 0) {
314 temp = ifp->if_flags & IFF_UP;
316 ifp->if_flags |= temp;
321 ifr = (struct ifreq *) data;
322 err = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
325 err = ether_ioctl(ifp, cmd, data);
335 * Encapsulate a packet of type family for the local net.
341 struct snc_softc *sc = ifp->if_softc;
345 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
349 /* Check for room in the xmit buffer. */
350 if ((mtd_next = (sc->mtd_free + 1)) == NTDA)
353 if (mtd_next == sc->mtd_hw) {
354 ifp->if_flags |= IFF_OACTIVE;
358 m = ifq_poll(&ifp->if_snd);
362 /* We need the header for m_pkthdr.len. */
363 if ((m->m_flags & M_PKTHDR) == 0)
364 panic("%s: sncstart: no header mbuf",
365 device_get_nameunit(sc->sc_dev));
368 * If there is nothing in the o/p queue, and there is room in
369 * the Tx ring, then send the packet directly. Otherwise append
370 * it to the o/p queue.
372 if ((sonicput(sc, m, mtd_next)) == 0)
374 m = ifq_dequeue(&ifp->if_snd);
378 sc->mtd_prev = sc->mtd_free;
379 sc->mtd_free = mtd_next;
381 ifp->if_opackets++; /* # of pkts */
383 /* Jump back for possibly more punishment. */
388 * reset and restart the SONIC. Called in case of fatal
389 * hardware/software errors.
393 struct snc_softc *sc;
403 struct snc_softc *sc = xsc;
406 if (sc->sc_if.if_flags & IFF_RUNNING)
407 /* already running */
412 NIC_PUT(sc, SNCR_CR, CR_RST); /* DCR only accessable in reset mode! */
415 NIC_PUT(sc, SNCR_DCR, (sc->sncr_dcr |
416 (sc->bitmode ? DCR_DW32 : DCR_DW16)));
417 NIC_PUT(sc, SNCR_DCR2, sc->sncr_dcr2);
419 s_rcr = RCR_BRD | RCR_LBNONE;
420 if (sc->sc_if.if_flags & IFF_PROMISC)
422 if (sc->sc_if.if_flags & IFF_ALLMULTI)
424 NIC_PUT(sc, SNCR_RCR, s_rcr);
426 NIC_PUT(sc, SNCR_IMR, (IMR_PRXEN | IMR_PTXEN | IMR_TXEREN | IMR_LCDEN));
428 /* clear pending interrupts */
429 NIC_PUT(sc, SNCR_ISR, ISR_ALL);
431 /* clear tally counters */
432 NIC_PUT(sc, SNCR_CRCT, -1);
433 NIC_PUT(sc, SNCR_FAET, -1);
434 NIC_PUT(sc, SNCR_MPT, -1);
440 /* enable the chip */
441 NIC_PUT(sc, SNCR_CR, 0);
444 /* program the CAM */
447 /* get it to read resource descriptors */
448 NIC_PUT(sc, SNCR_CR, CR_RRRA);
450 while ((NIC_GET(sc, SNCR_CR)) & CR_RRRA)
454 NIC_PUT(sc, SNCR_CR, CR_RXEN);
457 /* flag interface as "running" */
458 sc->sc_if.if_flags |= IFF_RUNNING;
459 sc->sc_if.if_flags &= ~IFF_OACTIVE;
465 * close down an interface and free its buffers
466 * Called on final close of device, or if sncinit() fails
471 struct snc_softc *sc;
477 /* stick chip in reset */
478 NIC_PUT(sc, SNCR_CR, CR_RST);
481 /* free all receive buffers (currently static so nothing to do) */
483 /* free all pending transmit mbufs */
484 while (sc->mtd_hw != sc->mtd_free) {
485 mtd = &sc->mtda[sc->mtd_hw];
487 m_freem(mtd->mtd_mbuf);
488 if (++sc->mtd_hw == NTDA) sc->mtd_hw = 0;
491 sc->sc_if.if_timer = 0;
492 sc->sc_if.if_flags &= ~(IFF_RUNNING | IFF_UP);
500 * Called if any Tx packets remain unsent after 5 seconds,
501 * In all cases we just reset the chip, and any retransmission
502 * will be handled by higher level protocol timeouts.
508 struct snc_softc *sc = ifp->if_softc;
512 if (sc->mtd_hw != sc->mtd_free) {
513 /* something still pending for transmit */
514 mtd = &sc->mtda[sc->mtd_hw];
515 if (SRO(sc, mtd->mtd_vtxp, TXP_STATUS) == 0)
516 log(LOG_ERR, "%s: Tx - timeout\n",
517 device_get_nameunit(sc->sc_dev));
519 log(LOG_ERR, "%s: Tx - lost interrupt\n",
520 device_get_nameunit(sc->sc_dev));
521 temp = ifp->if_flags & IFF_UP;
523 ifp->if_flags |= temp;
528 * stuff packet into sonic (at splnet)
531 sonicput(sc, m0, mtd_next)
532 struct snc_softc *sc;
543 #ifdef whyonearthwouldyoudothis
544 if (NIC_GET(sc, SNCR_CR) & CR_TXP)
548 /* grab the replacement mtd */
549 mtdp = &sc->mtda[sc->mtd_free];
551 buff = mtdp->mtd_vbuf;
553 /* this packet goes to mtdnext fill in the TDA */
555 txp = mtdp->mtd_vtxp;
557 /* Write to the config word. Every (NTDA/2)+1 packets we set an intr */
558 if (sc->mtd_pint == 0) {
559 sc->mtd_pint = NTDA/2;
560 SWO(sc, txp, TXP_CONFIG, TCR_PINT);
563 SWO(sc, txp, TXP_CONFIG, 0);
566 for (m = m0; m; m = m->m_next) {
569 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), buff, len);
572 if (totlen >= TXBSIZE) {
573 panic("%s: sonicput: packet overflow",
574 device_get_nameunit(sc->sc_dev));
577 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRLO,
578 LOWER(mtdp->mtd_vbuf));
579 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRHI,
580 UPPER(mtdp->mtd_vbuf));
582 if (totlen < ETHERMIN + sizeof(struct ether_header)) {
583 int pad = ETHERMIN + sizeof(struct ether_header) - totlen;
584 (*sc->sc_zerobuf)(sc, mtdp->mtd_vbuf + totlen, pad);
585 totlen = ETHERMIN + sizeof(struct ether_header);
588 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FSIZE,
590 SWO(sc, txp, TXP_FRAGCNT, 1);
591 SWO(sc, txp, TXP_PKTSIZE, totlen);
593 /* link onto the next mtd that will be used */
594 SWO(sc, txp, TXP_FRAGOFF + (1 * TXP_FRAGSIZE) + TXP_FPTRLO,
595 LOWER(sc->mtda[mtd_next].mtd_vtxp) | EOL);
598 * The previous txp.tlink currently contains a pointer to
599 * our txp | EOL. Want to clear the EOL, so write our
600 * pointer to the previous txp.
602 SWO(sc, sc->mtda[sc->mtd_prev].mtd_vtxp, sc->mtd_tlinko,
603 LOWER(mtdp->mtd_vtxp));
605 /* make sure chip is running */
607 NIC_PUT(sc, SNCR_CR, CR_TXP);
609 sc->sc_if.if_timer = 5; /* 5 seconds to watch for failing to transmit */
615 * These are called from sonicioctl() when /etc/ifconfig is run to set
616 * the address or switch the i/f on.
623 struct snc_softc *sc;
625 u_int32_t v_cda = sc->v_cda;
629 for (i = 0; i < MAXCAM; i++) {
630 camoffset = i * CDA_CAMDESC;
631 SWO(sc, v_cda, (camoffset + CDA_CAMEP), i);
632 SWO(sc, v_cda, (camoffset + CDA_CAMAP2), 0);
633 SWO(sc, v_cda, (camoffset + CDA_CAMAP1), 0);
634 SWO(sc, v_cda, (camoffset + CDA_CAMAP0), 0);
636 SWO(sc, v_cda, CDA_ENABLE, 0);
639 if ((sncdebug & SNC_SHOWCAMENT) != 0) {
646 camentry(sc, entry, ea)
649 struct snc_softc *sc;
651 u_int32_t v_cda = sc->v_cda;
652 int camoffset = entry * CDA_CAMDESC;
654 SWO(sc, v_cda, camoffset + CDA_CAMEP, entry);
655 SWO(sc, v_cda, camoffset + CDA_CAMAP2, (ea[5] << 8) | ea[4]);
656 SWO(sc, v_cda, camoffset + CDA_CAMAP1, (ea[3] << 8) | ea[2]);
657 SWO(sc, v_cda, camoffset + CDA_CAMAP0, (ea[1] << 8) | ea[0]);
658 SWO(sc, v_cda, CDA_ENABLE,
659 (SRO(sc, v_cda, CDA_ENABLE) | (1 << entry)));
664 struct snc_softc *sc;
666 struct ifmultiaddr *ifma;
675 /* Always load our own address first. */
676 camentry (sc, mcount, sc->sc_ethercom.ac_enaddr);
679 /* Assume we won't need allmulti bit. */
680 ifp->if_flags &= ~IFF_ALLMULTI;
682 /* Loop through multicast addresses */
683 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
684 if (ifma->ifma_addr->sa_family != AF_LINK)
686 if (mcount == MAXCAM) {
687 ifp->if_flags |= IFF_ALLMULTI;
691 /* program the CAM with the specified entry */
693 LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
697 NIC_PUT(sc, SNCR_CDP, LOWER(sc->v_cda));
698 NIC_PUT(sc, SNCR_CDC, MAXCAM);
699 NIC_PUT(sc, SNCR_CR, CR_LCAM);
703 while ((NIC_GET(sc, SNCR_CR) & CR_LCAM) && timeout--)
707 panic("%s: CAM initialisation failed\n",
708 device_get_nameunit(sc->sc_dev));
711 while (((NIC_GET(sc, SNCR_ISR) & ISR_LCD) == 0) && timeout--)
714 if (NIC_GET(sc, SNCR_ISR) & ISR_LCD)
715 NIC_PUT(sc, SNCR_ISR, ISR_LCD);
717 device_printf(sc->sc_dev,
718 "CAM initialisation without interrupt\n");
724 struct snc_softc *sc;
728 printf("CAM entries:\n");
729 NIC_PUT(sc, SNCR_CR, CR_RST);
732 for (i = 0; i < 16; i++) {
733 ushort ap2, ap1, ap0;
734 NIC_PUT(sc, SNCR_CEP, i);
736 ap2 = NIC_GET(sc, SNCR_CAP2);
737 ap1 = NIC_GET(sc, SNCR_CAP1);
738 ap0 = NIC_GET(sc, SNCR_CAP0);
739 printf("%d: ap2=0x%x ap1=0x%x ap0=0x%x\n", i, ap2, ap1, ap0);
741 printf("CAM enable 0x%x\n", NIC_GET(sc, SNCR_CEP));
743 NIC_PUT(sc, SNCR_CR, 0);
750 struct snc_softc *sc;
755 for (i = 0; i < NTDA; i++) {
761 sc->mtd_prev = NTDA - 1;
763 sc->mtd_tlinko = TXP_FRAGOFF + 1*TXP_FRAGSIZE + TXP_FPTRLO;
764 sc->mtd_pint = NTDA/2;
766 NIC_PUT(sc, SNCR_UTDA, UPPER(sc->mtda[0].mtd_vtxp));
767 NIC_PUT(sc, SNCR_CTDA, LOWER(sc->mtda[0].mtd_vtxp));
772 struct snc_softc *sc;
775 u_int32_t vv_rda = 0;
778 /* link the RDA's together into a circular list */
779 for (i = 0; i < (sc->sc_nrda - 1); i++) {
780 v_rda = sc->v_rda + (i * RXPKT_SIZE(sc));
781 vv_rda = sc->v_rda + ((i+1) * RXPKT_SIZE(sc));
782 SWO(sc, v_rda, RXPKT_RLINK, LOWER(vv_rda));
783 SWO(sc, v_rda, RXPKT_INUSE, 1);
785 v_rda = sc->v_rda + ((sc->sc_nrda - 1) * RXPKT_SIZE(sc));
786 SWO(sc, v_rda, RXPKT_RLINK, LOWER(sc->v_rda) | EOL);
787 SWO(sc, v_rda, RXPKT_INUSE, 1);
789 /* mark end of receive descriptor list */
790 sc->sc_rdamark = sc->sc_nrda - 1;
794 NIC_PUT(sc, SNCR_URDA, UPPER(sc->v_rda));
795 NIC_PUT(sc, SNCR_CRDA, LOWER(sc->v_rda));
801 struct snc_softc *sc;
805 int bitmode = sc->bitmode;
808 NIC_PUT(sc, SNCR_EOBC, RBASIZE(sc) / 2 - 2);
810 NIC_PUT(sc, SNCR_EOBC, RBASIZE(sc) / 2 - 1);
812 NIC_PUT(sc, SNCR_URRA, UPPER(sc->v_rra[0]));
813 NIC_PUT(sc, SNCR_RSA, LOWER(sc->v_rra[0]));
814 /* rea must point just past the end of the rra space */
815 NIC_PUT(sc, SNCR_REA, LOWER(sc->v_rea));
816 NIC_PUT(sc, SNCR_RRP, LOWER(sc->v_rra[0]));
817 NIC_PUT(sc, SNCR_RSC, 0);
819 /* fill up SOME of the rra with buffers */
820 for (i = 0; i < NRBA; i++) {
821 v = SONIC_GETDMA(sc->rbuf[i]);
822 SWO(sc, sc->v_rra[i], RXRSRC_PTRHI, UPPER(v));
823 SWO(sc, sc->v_rra[i], RXRSRC_PTRLO, LOWER(v));
824 SWO(sc, sc->v_rra[i], RXRSRC_WCHI, UPPER(NBPG/2));
825 SWO(sc, sc->v_rra[i], RXRSRC_WCLO, LOWER(NBPG/2));
827 sc->sc_rramark = NRBA;
828 NIC_PUT(sc, SNCR_RWP, LOWER(sc->v_rra[sc->sc_rramark]));
836 struct snc_softc *sc = (struct snc_softc *)arg;
839 if (sc->sc_enabled == 0)
842 while ((isr = (NIC_GET(sc, SNCR_ISR) & ISR_ALL)) != 0) {
843 /* scrub the interrupts that we are going to service */
844 NIC_PUT(sc, SNCR_ISR, isr);
847 if (isr & (ISR_BR | ISR_LCD | ISR_TC))
848 device_printf(sc->sc_dev,
849 "unexpected interrupt status 0x%x\n",
852 if (isr & (ISR_TXDN | ISR_TXER | ISR_PINT))
858 if (isr & (ISR_HBL | ISR_RDE | ISR_RBE | ISR_RBAE | ISR_RFO)) {
861 * The repeater is not providing a heartbeat.
862 * In itself this isn't harmful, lots of the
863 * cheap repeater hubs don't supply a heartbeat.
864 * So ignore the lack of heartbeat. Its only
865 * if we can't detect a carrier that we have a
870 device_printf(sc->sc_dev,
871 "receive descriptors exhausted\n");
873 device_printf(sc->sc_dev,
874 "receive buffers exhausted\n");
876 device_printf(sc->sc_dev,
877 "receive buffer area exhausted\n");
879 device_printf(sc->sc_dev,
880 "receive FIFO overrun\n");
882 if (isr & (ISR_CRC | ISR_FAE | ISR_MP)) {
892 sncstart(&sc->sc_if);
896 rnd_add_uint32(&sc->rnd_source, isr);
903 * Transmit interrupt routine
907 struct snc_softc *sc;
911 unsigned short txp_status;
913 struct ifnet *ifp = &sc->sc_if;
917 if (mtd_hw == sc->mtd_free)
920 while (mtd_hw != sc->mtd_free) {
921 mtd = &sc->mtda[mtd_hw];
925 if (SRO(sc, txp, TXP_STATUS) == 0) {
926 break; /* it hasn't really gone yet */
930 if ((sncdebug & SNC_SHOWTXHDR) != 0)
932 struct ether_header eh;
934 (*sc->sc_copyfrombuf)(sc, &eh, mtd->mtd_vbuf, sizeof(eh));
935 device_printf(sc->sc_dev,
936 "xmit status=0x%x len=%d type=0x%x from %6D",
937 SRO(sc, txp, TXP_STATUS),
938 SRO(sc, txp, TXP_PKTSIZE),
939 htons(eh.ether_type),
940 eh.ether_shost, ":");
941 printf(" (to %6D)\n", eh.ether_dhost, ":");
943 #endif /* SNCDEBUG */
945 ifp->if_flags &= ~IFF_OACTIVE;
947 if (mtd->mtd_mbuf != 0) {
948 m_freem(mtd->mtd_mbuf);
951 if (++mtd_hw == NTDA) mtd_hw = 0;
953 txp_status = SRO(sc, txp, TXP_STATUS);
955 ifp->if_collisions += (txp_status & TCR_EXC) ? 16 :
956 ((txp_status & TCR_NC) >> 12);
958 if ((txp_status & TCR_PTX) == 0) {
960 device_printf(sc->sc_dev, "Tx packet status=0x%x\n",
963 /* XXX - DG This looks bogus */
964 if (mtd_hw != sc->mtd_free) {
965 printf("resubmitting remaining packets\n");
966 mtd = &sc->mtda[mtd_hw];
967 NIC_PUT(sc, SNCR_CTDA, LOWER(mtd->mtd_vtxp));
968 NIC_PUT(sc, SNCR_CR, CR_TXP);
980 * Receive interrupt routine
984 struct snc_softc *sc;
993 rda = sc->v_rda + (sc->sc_rxmark * RXPKT_SIZE(sc));
995 while (SRO(sc, rda, RXPKT_INUSE) == 0) {
996 u_int status = SRO(sc, rda, RXPKT_STATUS);
998 orra = RBASEQ(SRO(sc, rda, RXPKT_SEQNO)) & RRAMASK;
999 rxpkt_ptr = SRO(sc, rda, RXPKT_PTRLO);
1001 * Do not trunc ether_header length.
1002 * Our sonic_read() and sonic_get() require it.
1004 len = SRO(sc, rda, RXPKT_BYTEC) - FCSSIZE;
1005 if (status & RCR_PRX) {
1006 /* XXX: Does PGOFSET require? */
1008 sc->rbuf[orra & RBAMASK] + (rxpkt_ptr & PGOFSET);
1009 if (sonic_read(sc, pkt, len))
1010 sc->sc_if.if_ipackets++;
1012 sc->sc_if.if_ierrors++;
1014 sc->sc_if.if_ierrors++;
1017 * give receive buffer area back to chip.
1019 * If this was the last packet in the RRA, give the RRA to
1021 * If sonic read didnt copy it out then we would have to
1023 * (dont bother add it back in again straight away)
1025 * Really, we're doing v_rra[rramark] = v_rra[orra] but
1026 * we have to use the macros because SONIC might be in
1027 * 16 or 32 bit mode.
1029 if (status & RCR_LPKT) {
1030 u_int32_t tmp1, tmp2;
1032 rramark = sc->sc_rramark;
1033 tmp1 = sc->v_rra[rramark];
1034 tmp2 = sc->v_rra[orra];
1035 SWO(sc, tmp1, RXRSRC_PTRLO,
1036 SRO(sc, tmp2, RXRSRC_PTRLO));
1037 SWO(sc, tmp1, RXRSRC_PTRHI,
1038 SRO(sc, tmp2, RXRSRC_PTRHI));
1039 SWO(sc, tmp1, RXRSRC_WCLO,
1040 SRO(sc, tmp2, RXRSRC_WCLO));
1041 SWO(sc, tmp1, RXRSRC_WCHI,
1042 SRO(sc, tmp2, RXRSRC_WCHI));
1044 /* zap old rra for fun */
1045 SWO(sc, tmp2, RXRSRC_WCHI, 0);
1046 SWO(sc, tmp2, RXRSRC_WCLO, 0);
1048 sc->sc_rramark = (++rramark) & RRAMASK;
1049 NIC_PUT(sc, SNCR_RWP, LOWER(sc->v_rra[rramark]));
1054 * give receive descriptor back to chip simple
1057 rdamark = sc->sc_rdamark;
1058 SWO(sc, rda, RXPKT_INUSE, 1);
1059 SWO(sc, rda, RXPKT_RLINK,
1060 SRO(sc, rda, RXPKT_RLINK) | EOL);
1061 SWO(sc, (sc->v_rda + (rdamark * RXPKT_SIZE(sc))), RXPKT_RLINK,
1062 SRO(sc, (sc->v_rda + (rdamark * RXPKT_SIZE(sc))),
1063 RXPKT_RLINK) & ~EOL);
1064 sc->sc_rdamark = sc->sc_rxmark;
1066 if (++sc->sc_rxmark >= sc->sc_nrda)
1068 rda = sc->v_rda + (sc->sc_rxmark * RXPKT_SIZE(sc));
1073 * sonic_read -- pull packet off interface and forward to
1074 * appropriate protocol handler
1077 sonic_read(sc, pkt, len)
1078 struct snc_softc *sc;
1082 struct ifnet *ifp = &sc->sc_if;
1085 if (len <= sizeof(struct ether_header) ||
1086 len > ETHERMTU + sizeof(struct ether_header)) {
1087 device_printf(sc->sc_dev,
1088 "invalid packet length %d bytes\n", len);
1092 /* Pull packet off interface. */
1093 m = sonic_get(sc, pkt, len);
1098 (*ifp->if_input)(ifp, m);
1104 * munge the received packet into an mbuf chain
1107 sonic_get(sc, pkt, datalen)
1108 struct snc_softc *sc;
1112 struct mbuf *m, *top, **mp;
1115 * Do not trunc ether_header length.
1116 * Our sonic_read() and sonic_get() require it.
1119 MGETHDR(m, MB_DONTWAIT, MT_DATA);
1122 m->m_pkthdr.rcvif = &sc->sc_if;
1123 m->m_pkthdr.len = datalen;
1128 while (datalen > 0) {
1130 MGET(m, MB_DONTWAIT, MT_DATA);
1137 if (datalen >= MINCLSIZE) {
1138 MCLGET(m, MB_DONTWAIT);
1139 if ((m->m_flags & M_EXT) == 0) {
1140 if (top) m_freem(top);
1149 ALIGN(sizeof(struct ether_header)) -
1150 sizeof(struct ether_header);
1155 m->m_len = len = min(datalen, len);
1157 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), pkt, len);
1167 * Enable power on the interface.
1171 struct snc_softc *sc;
1175 device_printf(sc->sc_dev, "snc_enable()\n");
1176 #endif /* SNCDEBUG */
1178 if (sc->sc_enabled == 0 && sc->sc_enable != NULL) {
1179 if ((*sc->sc_enable)(sc) != 0) {
1180 device_printf(sc->sc_dev, "device enable failed\n");
1190 * Disable power on the interface.
1194 struct snc_softc *sc;
1198 device_printf(sc->sc_dev, "snc_disable()\n");
1199 #endif /* SNCDEBUG */
1201 if (sc->sc_enabled != 0 && sc->sc_disable != NULL) {
1202 (*sc->sc_disable)(sc);