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) {
165 device_printf(sc->sc_dev, "address %6D\n", myea, ":");
168 device_printf(sc->sc_dev,
169 "buffers: rra=0x%x cda=0x%x rda=0x%x tda=0x%x\n",
170 sc->v_rra[0], sc->v_cda,
171 sc->v_rda, sc->mtda[0].mtd_vtxp);
175 ifp->if_unit = device_get_unit(sc->sc_dev);
176 ifp->if_name = "snc";
177 ifp->if_ioctl = sncioctl;
178 ifp->if_output = ether_output;
179 ifp->if_start = sncstart;
181 IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
182 ifp->if_watchdog = sncwatchdog;
183 ifp->if_init = sncinit;
184 ifp->if_mtu = ETHERMTU;
185 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
186 bcopy(myea, sc->sc_ethercom.ac_enaddr, ETHER_ADDR_LEN);
188 /* Initialize media goo. */
189 ifmedia_init(&sc->sc_media, 0, snc_mediachange,
192 for (i = 0; i < nmedia; i++)
193 ifmedia_add(&sc->sc_media, media[i], 0, NULL);
194 ifmedia_set(&sc->sc_media, defmedia);
196 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL);
197 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL);
200 ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
203 rnd_attach_source(&sc->rnd_source, device_get_nameunit(sc->sc_dev),
213 sncstop((struct snc_softc *)arg);
217 * Media change callback.
223 struct snc_softc *sc = ifp->if_softc;
225 if (sc->sc_mediachange)
226 return ((*sc->sc_mediachange)(sc));
231 * Media status callback.
234 snc_mediastatus(ifp, ifmr)
236 struct ifmediareq *ifmr;
238 struct snc_softc *sc = ifp->if_softc;
240 if (sc->sc_enabled == 0) {
241 ifmr->ifm_active = IFM_ETHER | IFM_NONE;
242 ifmr->ifm_status = 0;
246 if (sc->sc_mediastatus)
247 (*sc->sc_mediastatus)(sc, ifmr);
252 sncioctl(ifp, cmd, data)
258 struct snc_softc *sc = ifp->if_softc;
259 int s = splnet(), err = 0;
267 err = ether_ioctl(ifp, cmd, data);
271 if ((ifp->if_flags & IFF_UP) == 0 &&
272 (ifp->if_flags & IFF_RUNNING) != 0) {
274 * If interface is marked down and it is running,
278 ifp->if_flags &= ~IFF_RUNNING;
280 } else if ((ifp->if_flags & IFF_UP) != 0 &&
281 (ifp->if_flags & IFF_RUNNING) == 0) {
283 * If interface is marked up and it is stopped,
286 if ((err = snc_enable(sc)) != 0)
289 } else if (sc->sc_enabled) {
291 * reset the interface to pick up any other changes
294 temp = ifp->if_flags & IFF_UP;
296 ifp->if_flags |= temp;
303 if (sc->sc_enabled == 0) {
307 temp = ifp->if_flags & IFF_UP;
309 ifp->if_flags |= temp;
314 ifr = (struct ifreq *) data;
315 err = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
325 * Encapsulate a packet of type family for the local net.
331 struct snc_softc *sc = ifp->if_softc;
335 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
339 /* Check for room in the xmit buffer. */
340 if ((mtd_next = (sc->mtd_free + 1)) == NTDA)
343 if (mtd_next == sc->mtd_hw) {
344 ifp->if_flags |= IFF_OACTIVE;
348 IF_DEQUEUE(&ifp->if_snd, m);
352 /* We need the header for m_pkthdr.len. */
353 if ((m->m_flags & M_PKTHDR) == 0)
354 panic("%s: sncstart: no header mbuf",
355 device_get_nameunit(sc->sc_dev));
358 * If bpf is listening on this interface, let it
359 * see the packet before we commit it to the wire.
365 * If there is nothing in the o/p queue, and there is room in
366 * the Tx ring, then send the packet directly. Otherwise append
367 * it to the o/p queue.
369 if ((sonicput(sc, m, mtd_next)) == 0) {
370 IF_PREPEND(&ifp->if_snd, m);
374 sc->mtd_prev = sc->mtd_free;
375 sc->mtd_free = mtd_next;
377 ifp->if_opackets++; /* # of pkts */
379 /* Jump back for possibly more punishment. */
384 * reset and restart the SONIC. Called in case of fatal
385 * hardware/software errors.
389 struct snc_softc *sc;
399 struct snc_softc *sc = xsc;
403 if (sc->sc_if.if_flags & IFF_RUNNING)
404 /* already running */
409 NIC_PUT(sc, SNCR_CR, CR_RST); /* DCR only accessable in reset mode! */
412 NIC_PUT(sc, SNCR_DCR, (sc->sncr_dcr |
413 (sc->bitmode ? DCR_DW32 : DCR_DW16)));
414 NIC_PUT(sc, SNCR_DCR2, sc->sncr_dcr2);
416 s_rcr = RCR_BRD | RCR_LBNONE;
417 if (sc->sc_if.if_flags & IFF_PROMISC)
419 if (sc->sc_if.if_flags & IFF_ALLMULTI)
421 NIC_PUT(sc, SNCR_RCR, s_rcr);
423 NIC_PUT(sc, SNCR_IMR, (IMR_PRXEN | IMR_PTXEN | IMR_TXEREN | IMR_LCDEN));
425 /* clear pending interrupts */
426 NIC_PUT(sc, SNCR_ISR, ISR_ALL);
428 /* clear tally counters */
429 NIC_PUT(sc, SNCR_CRCT, -1);
430 NIC_PUT(sc, SNCR_FAET, -1);
431 NIC_PUT(sc, SNCR_MPT, -1);
437 /* enable the chip */
438 NIC_PUT(sc, SNCR_CR, 0);
441 /* program the CAM */
444 /* get it to read resource descriptors */
445 NIC_PUT(sc, SNCR_CR, CR_RRRA);
447 while ((NIC_GET(sc, SNCR_CR)) & CR_RRRA)
451 NIC_PUT(sc, SNCR_CR, CR_RXEN);
454 /* flag interface as "running" */
455 sc->sc_if.if_flags |= IFF_RUNNING;
456 sc->sc_if.if_flags &= ~IFF_OACTIVE;
463 * close down an interface and free its buffers
464 * Called on final close of device, or if sncinit() fails
469 struct snc_softc *sc;
474 /* stick chip in reset */
475 NIC_PUT(sc, SNCR_CR, CR_RST);
478 /* free all receive buffers (currently static so nothing to do) */
480 /* free all pending transmit mbufs */
481 while (sc->mtd_hw != sc->mtd_free) {
482 mtd = &sc->mtda[sc->mtd_hw];
484 m_freem(mtd->mtd_mbuf);
485 if (++sc->mtd_hw == NTDA) sc->mtd_hw = 0;
488 sc->sc_if.if_timer = 0;
489 sc->sc_if.if_flags &= ~(IFF_RUNNING | IFF_UP);
496 * Called if any Tx packets remain unsent after 5 seconds,
497 * In all cases we just reset the chip, and any retransmission
498 * will be handled by higher level protocol timeouts.
504 struct snc_softc *sc = ifp->if_softc;
508 if (sc->mtd_hw != sc->mtd_free) {
509 /* something still pending for transmit */
510 mtd = &sc->mtda[sc->mtd_hw];
511 if (SRO(sc, mtd->mtd_vtxp, TXP_STATUS) == 0)
512 log(LOG_ERR, "%s: Tx - timeout\n",
513 device_get_nameunit(sc->sc_dev));
515 log(LOG_ERR, "%s: Tx - lost interrupt\n",
516 device_get_nameunit(sc->sc_dev));
517 temp = ifp->if_flags & IFF_UP;
519 ifp->if_flags |= temp;
524 * stuff packet into sonic (at splnet)
527 sonicput(sc, m0, mtd_next)
528 struct snc_softc *sc;
539 #ifdef whyonearthwouldyoudothis
540 if (NIC_GET(sc, SNCR_CR) & CR_TXP)
544 /* grab the replacement mtd */
545 mtdp = &sc->mtda[sc->mtd_free];
547 buff = mtdp->mtd_vbuf;
549 /* this packet goes to mtdnext fill in the TDA */
551 txp = mtdp->mtd_vtxp;
553 /* Write to the config word. Every (NTDA/2)+1 packets we set an intr */
554 if (sc->mtd_pint == 0) {
555 sc->mtd_pint = NTDA/2;
556 SWO(sc, txp, TXP_CONFIG, TCR_PINT);
559 SWO(sc, txp, TXP_CONFIG, 0);
562 for (m = m0; m; m = m->m_next) {
565 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), buff, len);
568 if (totlen >= TXBSIZE) {
569 panic("%s: sonicput: packet overflow",
570 device_get_nameunit(sc->sc_dev));
573 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRLO,
574 LOWER(mtdp->mtd_vbuf));
575 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRHI,
576 UPPER(mtdp->mtd_vbuf));
578 if (totlen < ETHERMIN + sizeof(struct ether_header)) {
579 int pad = ETHERMIN + sizeof(struct ether_header) - totlen;
580 (*sc->sc_zerobuf)(sc, mtdp->mtd_vbuf + totlen, pad);
581 totlen = ETHERMIN + sizeof(struct ether_header);
584 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FSIZE,
586 SWO(sc, txp, TXP_FRAGCNT, 1);
587 SWO(sc, txp, TXP_PKTSIZE, totlen);
589 /* link onto the next mtd that will be used */
590 SWO(sc, txp, TXP_FRAGOFF + (1 * TXP_FRAGSIZE) + TXP_FPTRLO,
591 LOWER(sc->mtda[mtd_next].mtd_vtxp) | EOL);
594 * The previous txp.tlink currently contains a pointer to
595 * our txp | EOL. Want to clear the EOL, so write our
596 * pointer to the previous txp.
598 SWO(sc, sc->mtda[sc->mtd_prev].mtd_vtxp, sc->mtd_tlinko,
599 LOWER(mtdp->mtd_vtxp));
601 /* make sure chip is running */
603 NIC_PUT(sc, SNCR_CR, CR_TXP);
605 sc->sc_if.if_timer = 5; /* 5 seconds to watch for failing to transmit */
611 * These are called from sonicioctl() when /etc/ifconfig is run to set
612 * the address or switch the i/f on.
619 struct snc_softc *sc;
621 u_int32_t v_cda = sc->v_cda;
625 for (i = 0; i < MAXCAM; i++) {
626 camoffset = i * CDA_CAMDESC;
627 SWO(sc, v_cda, (camoffset + CDA_CAMEP), i);
628 SWO(sc, v_cda, (camoffset + CDA_CAMAP2), 0);
629 SWO(sc, v_cda, (camoffset + CDA_CAMAP1), 0);
630 SWO(sc, v_cda, (camoffset + CDA_CAMAP0), 0);
632 SWO(sc, v_cda, CDA_ENABLE, 0);
635 if ((sncdebug & SNC_SHOWCAMENT) != 0) {
642 camentry(sc, entry, ea)
645 struct snc_softc *sc;
647 u_int32_t v_cda = sc->v_cda;
648 int camoffset = entry * CDA_CAMDESC;
650 SWO(sc, v_cda, camoffset + CDA_CAMEP, entry);
651 SWO(sc, v_cda, camoffset + CDA_CAMAP2, (ea[5] << 8) | ea[4]);
652 SWO(sc, v_cda, camoffset + CDA_CAMAP1, (ea[3] << 8) | ea[2]);
653 SWO(sc, v_cda, camoffset + CDA_CAMAP0, (ea[1] << 8) | ea[0]);
654 SWO(sc, v_cda, CDA_ENABLE,
655 (SRO(sc, v_cda, CDA_ENABLE) | (1 << entry)));
660 struct snc_softc *sc;
662 struct ifmultiaddr *ifma;
671 /* Always load our own address first. */
672 camentry (sc, mcount, sc->sc_ethercom.ac_enaddr);
675 /* Assume we won't need allmulti bit. */
676 ifp->if_flags &= ~IFF_ALLMULTI;
678 /* Loop through multicast addresses */
679 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
680 if (ifma->ifma_addr->sa_family != AF_LINK)
682 if (mcount == MAXCAM) {
683 ifp->if_flags |= IFF_ALLMULTI;
687 /* program the CAM with the specified entry */
689 LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
693 NIC_PUT(sc, SNCR_CDP, LOWER(sc->v_cda));
694 NIC_PUT(sc, SNCR_CDC, MAXCAM);
695 NIC_PUT(sc, SNCR_CR, CR_LCAM);
699 while ((NIC_GET(sc, SNCR_CR) & CR_LCAM) && timeout--)
703 panic("%s: CAM initialisation failed\n",
704 device_get_nameunit(sc->sc_dev));
707 while (((NIC_GET(sc, SNCR_ISR) & ISR_LCD) == 0) && timeout--)
710 if (NIC_GET(sc, SNCR_ISR) & ISR_LCD)
711 NIC_PUT(sc, SNCR_ISR, ISR_LCD);
713 device_printf(sc->sc_dev,
714 "CAM initialisation without interrupt\n");
720 struct snc_softc *sc;
724 printf("CAM entries:\n");
725 NIC_PUT(sc, SNCR_CR, CR_RST);
728 for (i = 0; i < 16; i++) {
729 ushort ap2, ap1, ap0;
730 NIC_PUT(sc, SNCR_CEP, i);
732 ap2 = NIC_GET(sc, SNCR_CAP2);
733 ap1 = NIC_GET(sc, SNCR_CAP1);
734 ap0 = NIC_GET(sc, SNCR_CAP0);
735 printf("%d: ap2=0x%x ap1=0x%x ap0=0x%x\n", i, ap2, ap1, ap0);
737 printf("CAM enable 0x%x\n", NIC_GET(sc, SNCR_CEP));
739 NIC_PUT(sc, SNCR_CR, 0);
746 struct snc_softc *sc;
751 for (i = 0; i < NTDA; i++) {
757 sc->mtd_prev = NTDA - 1;
759 sc->mtd_tlinko = TXP_FRAGOFF + 1*TXP_FRAGSIZE + TXP_FPTRLO;
760 sc->mtd_pint = NTDA/2;
762 NIC_PUT(sc, SNCR_UTDA, UPPER(sc->mtda[0].mtd_vtxp));
763 NIC_PUT(sc, SNCR_CTDA, LOWER(sc->mtda[0].mtd_vtxp));
768 struct snc_softc *sc;
771 u_int32_t vv_rda = 0;
774 /* link the RDA's together into a circular list */
775 for (i = 0; i < (sc->sc_nrda - 1); i++) {
776 v_rda = sc->v_rda + (i * RXPKT_SIZE(sc));
777 vv_rda = sc->v_rda + ((i+1) * RXPKT_SIZE(sc));
778 SWO(sc, v_rda, RXPKT_RLINK, LOWER(vv_rda));
779 SWO(sc, v_rda, RXPKT_INUSE, 1);
781 v_rda = sc->v_rda + ((sc->sc_nrda - 1) * RXPKT_SIZE(sc));
782 SWO(sc, v_rda, RXPKT_RLINK, LOWER(sc->v_rda) | EOL);
783 SWO(sc, v_rda, RXPKT_INUSE, 1);
785 /* mark end of receive descriptor list */
786 sc->sc_rdamark = sc->sc_nrda - 1;
790 NIC_PUT(sc, SNCR_URDA, UPPER(sc->v_rda));
791 NIC_PUT(sc, SNCR_CRDA, LOWER(sc->v_rda));
797 struct snc_softc *sc;
801 int bitmode = sc->bitmode;
804 NIC_PUT(sc, SNCR_EOBC, RBASIZE(sc) / 2 - 2);
806 NIC_PUT(sc, SNCR_EOBC, RBASIZE(sc) / 2 - 1);
808 NIC_PUT(sc, SNCR_URRA, UPPER(sc->v_rra[0]));
809 NIC_PUT(sc, SNCR_RSA, LOWER(sc->v_rra[0]));
810 /* rea must point just past the end of the rra space */
811 NIC_PUT(sc, SNCR_REA, LOWER(sc->v_rea));
812 NIC_PUT(sc, SNCR_RRP, LOWER(sc->v_rra[0]));
813 NIC_PUT(sc, SNCR_RSC, 0);
815 /* fill up SOME of the rra with buffers */
816 for (i = 0; i < NRBA; i++) {
817 v = SONIC_GETDMA(sc->rbuf[i]);
818 SWO(sc, sc->v_rra[i], RXRSRC_PTRHI, UPPER(v));
819 SWO(sc, sc->v_rra[i], RXRSRC_PTRLO, LOWER(v));
820 SWO(sc, sc->v_rra[i], RXRSRC_WCHI, UPPER(NBPG/2));
821 SWO(sc, sc->v_rra[i], RXRSRC_WCLO, LOWER(NBPG/2));
823 sc->sc_rramark = NRBA;
824 NIC_PUT(sc, SNCR_RWP, LOWER(sc->v_rra[sc->sc_rramark]));
832 struct snc_softc *sc = (struct snc_softc *)arg;
835 if (sc->sc_enabled == 0)
838 while ((isr = (NIC_GET(sc, SNCR_ISR) & ISR_ALL)) != 0) {
839 /* scrub the interrupts that we are going to service */
840 NIC_PUT(sc, SNCR_ISR, isr);
843 if (isr & (ISR_BR | ISR_LCD | ISR_TC))
844 device_printf(sc->sc_dev,
845 "unexpected interrupt status 0x%x\n",
848 if (isr & (ISR_TXDN | ISR_TXER | ISR_PINT))
854 if (isr & (ISR_HBL | ISR_RDE | ISR_RBE | ISR_RBAE | ISR_RFO)) {
857 * The repeater is not providing a heartbeat.
858 * In itself this isn't harmful, lots of the
859 * cheap repeater hubs don't supply a heartbeat.
860 * So ignore the lack of heartbeat. Its only
861 * if we can't detect a carrier that we have a
866 device_printf(sc->sc_dev,
867 "receive descriptors exhausted\n");
869 device_printf(sc->sc_dev,
870 "receive buffers exhausted\n");
872 device_printf(sc->sc_dev,
873 "receive buffer area exhausted\n");
875 device_printf(sc->sc_dev,
876 "receive FIFO overrun\n");
878 if (isr & (ISR_CRC | ISR_FAE | ISR_MP)) {
888 sncstart(&sc->sc_if);
892 rnd_add_uint32(&sc->rnd_source, isr);
899 * Transmit interrupt routine
903 struct snc_softc *sc;
907 unsigned short txp_status;
909 struct ifnet *ifp = &sc->sc_if;
913 if (mtd_hw == sc->mtd_free)
916 while (mtd_hw != sc->mtd_free) {
917 mtd = &sc->mtda[mtd_hw];
921 if (SRO(sc, txp, TXP_STATUS) == 0) {
922 break; /* it hasn't really gone yet */
926 if ((sncdebug & SNC_SHOWTXHDR) != 0)
928 struct ether_header eh;
930 (*sc->sc_copyfrombuf)(sc, &eh, mtd->mtd_vbuf, sizeof(eh));
931 device_printf(sc->sc_dev,
932 "xmit status=0x%x len=%d type=0x%x from %6D",
933 SRO(sc, txp, TXP_STATUS),
934 SRO(sc, txp, TXP_PKTSIZE),
935 htons(eh.ether_type),
936 eh.ether_shost, ":");
937 printf(" (to %6D)\n", eh.ether_dhost, ":");
939 #endif /* SNCDEBUG */
941 ifp->if_flags &= ~IFF_OACTIVE;
943 if (mtd->mtd_mbuf != 0) {
944 m_freem(mtd->mtd_mbuf);
947 if (++mtd_hw == NTDA) mtd_hw = 0;
949 txp_status = SRO(sc, txp, TXP_STATUS);
951 ifp->if_collisions += (txp_status & TCR_EXC) ? 16 :
952 ((txp_status & TCR_NC) >> 12);
954 if ((txp_status & TCR_PTX) == 0) {
956 device_printf(sc->sc_dev, "Tx packet status=0x%x\n",
959 /* XXX - DG This looks bogus */
960 if (mtd_hw != sc->mtd_free) {
961 printf("resubmitting remaining packets\n");
962 mtd = &sc->mtda[mtd_hw];
963 NIC_PUT(sc, SNCR_CTDA, LOWER(mtd->mtd_vtxp));
964 NIC_PUT(sc, SNCR_CR, CR_TXP);
976 * Receive interrupt routine
980 struct snc_softc *sc;
989 rda = sc->v_rda + (sc->sc_rxmark * RXPKT_SIZE(sc));
991 while (SRO(sc, rda, RXPKT_INUSE) == 0) {
992 u_int status = SRO(sc, rda, RXPKT_STATUS);
994 orra = RBASEQ(SRO(sc, rda, RXPKT_SEQNO)) & RRAMASK;
995 rxpkt_ptr = SRO(sc, rda, RXPKT_PTRLO);
997 * Do not trunc ether_header length.
998 * Our sonic_read() and sonic_get() require it.
1000 len = SRO(sc, rda, RXPKT_BYTEC) - FCSSIZE;
1001 if (status & RCR_PRX) {
1002 /* XXX: Does PGOFSET require? */
1004 sc->rbuf[orra & RBAMASK] + (rxpkt_ptr & PGOFSET);
1005 if (sonic_read(sc, pkt, len))
1006 sc->sc_if.if_ipackets++;
1008 sc->sc_if.if_ierrors++;
1010 sc->sc_if.if_ierrors++;
1013 * give receive buffer area back to chip.
1015 * If this was the last packet in the RRA, give the RRA to
1017 * If sonic read didnt copy it out then we would have to
1019 * (dont bother add it back in again straight away)
1021 * Really, we're doing v_rra[rramark] = v_rra[orra] but
1022 * we have to use the macros because SONIC might be in
1023 * 16 or 32 bit mode.
1025 if (status & RCR_LPKT) {
1026 u_int32_t tmp1, tmp2;
1028 rramark = sc->sc_rramark;
1029 tmp1 = sc->v_rra[rramark];
1030 tmp2 = sc->v_rra[orra];
1031 SWO(sc, tmp1, RXRSRC_PTRLO,
1032 SRO(sc, tmp2, RXRSRC_PTRLO));
1033 SWO(sc, tmp1, RXRSRC_PTRHI,
1034 SRO(sc, tmp2, RXRSRC_PTRHI));
1035 SWO(sc, tmp1, RXRSRC_WCLO,
1036 SRO(sc, tmp2, RXRSRC_WCLO));
1037 SWO(sc, tmp1, RXRSRC_WCHI,
1038 SRO(sc, tmp2, RXRSRC_WCHI));
1040 /* zap old rra for fun */
1041 SWO(sc, tmp2, RXRSRC_WCHI, 0);
1042 SWO(sc, tmp2, RXRSRC_WCLO, 0);
1044 sc->sc_rramark = (++rramark) & RRAMASK;
1045 NIC_PUT(sc, SNCR_RWP, LOWER(sc->v_rra[rramark]));
1050 * give receive descriptor back to chip simple
1053 rdamark = sc->sc_rdamark;
1054 SWO(sc, rda, RXPKT_INUSE, 1);
1055 SWO(sc, rda, RXPKT_RLINK,
1056 SRO(sc, rda, RXPKT_RLINK) | EOL);
1057 SWO(sc, (sc->v_rda + (rdamark * RXPKT_SIZE(sc))), RXPKT_RLINK,
1058 SRO(sc, (sc->v_rda + (rdamark * RXPKT_SIZE(sc))),
1059 RXPKT_RLINK) & ~EOL);
1060 sc->sc_rdamark = sc->sc_rxmark;
1062 if (++sc->sc_rxmark >= sc->sc_nrda)
1064 rda = sc->v_rda + (sc->sc_rxmark * RXPKT_SIZE(sc));
1069 * sonic_read -- pull packet off interface and forward to
1070 * appropriate protocol handler
1073 sonic_read(sc, pkt, len)
1074 struct snc_softc *sc;
1078 struct ifnet *ifp = &sc->sc_if;
1079 struct ether_header *et;
1082 if (len <= sizeof(struct ether_header) ||
1083 len > ETHERMTU + sizeof(struct ether_header)) {
1084 device_printf(sc->sc_dev,
1085 "invalid packet length %d bytes\n", len);
1089 /* Pull packet off interface. */
1090 m = sonic_get(sc, pkt, len);
1095 /* We assume that the header fit entirely in one mbuf. */
1096 et = mtod(m, struct ether_header *);
1099 if ((sncdebug & SNC_SHOWRXHDR) != 0)
1101 device_printf(sc->sc_dev, "rcvd 0x%x len=%d type=0x%x from %6D",
1102 pkt, len, htons(et->ether_type),
1103 et->ether_shost, ":");
1104 printf(" (to %6D)\n", et->ether_dhost, ":");
1106 #endif /* SNCDEBUG */
1108 /* Pass the packet up, with the ether header sort-of removed. */
1109 m_adj(m, sizeof(struct ether_header));
1110 ether_input(ifp, et, m);
1116 * munge the received packet into an mbuf chain
1119 sonic_get(sc, pkt, datalen)
1120 struct snc_softc *sc;
1124 struct mbuf *m, *top, **mp;
1127 * Do not trunc ether_header length.
1128 * Our sonic_read() and sonic_get() require it.
1131 MGETHDR(m, M_DONTWAIT, MT_DATA);
1134 m->m_pkthdr.rcvif = &sc->sc_if;
1135 m->m_pkthdr.len = datalen;
1140 while (datalen > 0) {
1142 MGET(m, M_DONTWAIT, MT_DATA);
1149 if (datalen >= MINCLSIZE) {
1150 MCLGET(m, M_DONTWAIT);
1151 if ((m->m_flags & M_EXT) == 0) {
1152 if (top) m_freem(top);
1161 ALIGN(sizeof(struct ether_header)) -
1162 sizeof(struct ether_header);
1167 m->m_len = len = min(datalen, len);
1169 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), pkt, len);
1179 * Enable power on the interface.
1183 struct snc_softc *sc;
1187 device_printf(sc->sc_dev, "snc_enable()\n");
1188 #endif /* SNCDEBUG */
1190 if (sc->sc_enabled == 0 && sc->sc_enable != NULL) {
1191 if ((*sc->sc_enable)(sc) != 0) {
1192 device_printf(sc->sc_dev, "device enable failed\n");
1202 * Disable power on the interface.
1206 struct snc_softc *sc;
1210 device_printf(sc->sc_dev, "snc_disable()\n");
1211 #endif /* SNCDEBUG */
1213 if (sc->sc_enabled != 0 && sc->sc_disable != NULL) {
1214 (*sc->sc_disable)(sc);