2 * Copyright (c) 1994-2000
3 * Paul Richards. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * verbatim and that no modifications are made prior to this
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name Paul Richards may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY PAUL RICHARDS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL PAUL RICHARDS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * $FreeBSD: src/sys/dev/lnc/if_lnc.c,v 1.89 2001/07/04 13:00:19 nyan Exp $
31 * $DragonFly: src/sys/dev/netif/lnc/Attic/if_lnc.c,v 1.17 2005/02/19 00:16:54 joerg Exp $
40 * Check all the XXX comments -- some of them are just things I've left
41 * unfinished rather than "difficult" problems that were hacked around.
45 * Check how all the arpcom flags get set and used.
47 * Re-inline and re-static all routines after debugging.
49 * Remember to assign iobase in SHMEM probe routines.
51 * Replace all occurences of LANCE-controller-card etc in prints by the name
52 * strings of the appropriate type -- nifty window dressing
54 * Add DEPCA support -- mostly done.
60 /* Some defines that should really be in generic locations */
62 #define MULTICAST_FILTER_LEN 8
64 #include <sys/param.h>
65 #include <sys/systm.h>
67 #include <sys/kernel.h>
68 #include <sys/malloc.h>
70 #include <sys/module.h>
71 #include <sys/socket.h>
72 #include <sys/sockio.h>
73 #include <sys/syslog.h>
75 #include <machine/bus.h>
76 #include <machine/resource.h>
79 #include <net/ethernet.h>
81 #include <net/ifq_var.h>
82 #include <net/if_dl.h>
83 #include <net/if_types.h>
85 #include <netinet/in.h>
86 #include <netinet/if_ether.h>
90 #include <machine/md_var.h>
92 #include <dev/netif/lnc/if_lncvar.h>
93 #include <dev/netif/lnc/if_lncreg.h>
95 DECLARE_DUMMY_MODULE(if_lnc);
97 devclass_t lnc_devclass;
99 static char const * const nic_ident[] = {
104 "CNET98S", /* PC-98 */
107 static char const * const ic_ident[] = {
122 static void lnc_setladrf(struct lnc_softc *sc);
123 static void lnc_reset(struct lnc_softc *sc);
124 static void lnc_free_mbufs(struct lnc_softc *sc);
125 static __inline int alloc_mbuf_cluster(struct lnc_softc *sc,
126 struct host_ring_entry *desc);
127 static __inline struct mbuf *chain_mbufs(struct lnc_softc *sc,
130 static __inline struct mbuf *mbuf_packet(struct lnc_softc *sc,
133 static void lnc_rint(struct lnc_softc *sc);
134 static void lnc_tint(struct lnc_softc *sc);
136 static void lnc_init(void *);
137 static __inline int mbuf_to_buffer(struct mbuf *m, char *buffer);
138 static __inline struct mbuf *chain_to_cluster(struct mbuf *m);
139 static void lnc_start(struct ifnet *ifp);
140 static int lnc_ioctl(struct ifnet *ifp, u_long command, caddr_t data,
142 static void lnc_watchdog(struct ifnet *ifp);
144 void lnc_dump_state(struct lnc_softc *sc);
145 void mbuf_dump_chain(struct mbuf *m);
149 read_csr(struct lnc_softc *sc, u_short port)
151 lnc_outw(sc->rap, port);
152 return (lnc_inw(sc->rdp));
156 write_csr(struct lnc_softc *sc, u_short port, u_short val)
158 lnc_outw(sc->rap, port);
159 lnc_outw(sc->rdp, val);
163 write_bcr(struct lnc_softc *sc, u_short port, u_short val)
165 lnc_outw(sc->rap, port);
166 lnc_outw(sc->bdp, val);
169 static __inline u_short
170 read_bcr(struct lnc_softc *sc, u_short port)
172 lnc_outw(sc->rap, port);
173 return (lnc_inw(sc->bdp));
177 lance_probe(struct lnc_softc *sc)
179 write_csr(sc, CSR0, STOP);
181 if ((lnc_inw(sc->rdp) & STOP) && ! (read_csr(sc, CSR3))) {
183 * Check to see if it's a C-LANCE. For the LANCE the INEA bit
184 * cannot be set while the STOP bit is. This restriction is
185 * removed for the C-LANCE.
187 write_csr(sc, CSR0, INEA);
188 if (read_csr(sc, CSR0) & INEA)
196 static __inline u_long
197 ether_crc(const u_char *ether_addr)
199 #define POLYNOMIAL 0xEDB88320UL
201 u_int crc = 0xFFFFFFFFUL;
203 for (i = 0; i < ETHER_ADDR_LEN; i++) {
204 addr = *ether_addr++;
205 for (j = 0; j < MULTICAST_FILTER_LEN; j++) {
206 crc = (crc >> 1) ^ (((crc ^ addr) & 1) ? POLYNOMIAL : 0);
215 lnc_release_resources(device_t dev)
217 lnc_softc_t *sc = device_get_softc(dev);
220 bus_teardown_intr(dev, sc->irqres, sc->intrhand);
221 bus_release_resource(dev, SYS_RES_IRQ, sc->irqrid, sc->irqres);
225 bus_release_resource(dev, SYS_RES_IOPORT,
226 sc->portrid, sc->portres);
228 bus_release_resource(dev, SYS_RES_DRQ, sc->drqrid, sc->drqres);
232 bus_dmamap_unload(sc->dmat, sc->dmamap);
233 bus_dmamem_free(sc->dmat, sc->recv_ring, sc->dmamap);
235 bus_dma_tag_destroy(sc->dmat);
240 * Set up the logical address filter for multicast packets
243 lnc_setladrf(struct lnc_softc *sc)
245 struct ifnet *ifp = &sc->arpcom.ac_if;
246 struct ifmultiaddr *ifma;
250 if (sc->flags & IFF_ALLMULTI) {
251 for (i=0; i < MULTICAST_FILTER_LEN; i++)
252 sc->init_block->ladrf[i] = 0xFF;
257 * For each multicast address, calculate a crc for that address and
258 * then use the high order 6 bits of the crc as a hash code where
259 * bits 3-5 select the byte of the address filter and bits 0-2 select
260 * the bit within that byte.
263 bzero(sc->init_block->ladrf, MULTICAST_FILTER_LEN);
264 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
265 if (ifma->ifma_addr->sa_family != AF_LINK)
268 index = ether_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr))
270 sc->init_block->ladrf[index >> 3] |= 1 << (index & 7);
275 lnc_stop(struct lnc_softc *sc)
277 write_csr(sc, CSR0, STOP);
281 lnc_reset(struct lnc_softc *sc)
287 lnc_free_mbufs(struct lnc_softc *sc)
292 * We rely on other routines to keep the buff.mbuf field valid. If
293 * it's not NULL then we assume it points to an allocated mbuf.
296 for (i = 0; i < NDESC(sc->nrdre); i++)
297 if ((sc->recv_ring + i)->buff.mbuf)
298 m_free((sc->recv_ring + i)->buff.mbuf);
300 for (i = 0; i < NDESC(sc->ntdre); i++)
301 if ((sc->trans_ring + i)->buff.mbuf)
302 m_free((sc->trans_ring + i)->buff.mbuf);
309 alloc_mbuf_cluster(struct lnc_softc *sc, struct host_ring_entry *desc)
311 struct mds *md = desc->md;
315 /* Try and get cluster off local cache */
316 if (sc->mbuf_count) {
319 sc->mbufs = m->m_next;
320 /* XXX m->m_data = m->m_ext.ext_buf;*/
322 MGET(m, MB_DONTWAIT, MT_DATA);
325 MCLGET(m, MB_DONTWAIT);
326 if (!m->m_ext.ext_buf) {
333 addr = kvtop(m->m_data);
335 md->md1= ((addr >> 16) & 0xff) | OWN;
336 md->md2 = -(short)(MCLBYTES - sizeof(struct pkthdr));
341 static __inline struct mbuf *
342 chain_mbufs(struct lnc_softc *sc, int start_of_packet, int pkt_len)
344 struct mbuf *head, *m;
345 struct host_ring_entry *desc;
348 * Turn head into a pkthdr mbuf --
349 * assumes a pkthdr type mbuf was
350 * allocated to the descriptor
354 desc = sc->recv_ring + start_of_packet;
356 head = desc->buff.mbuf;
357 head->m_flags |= M_PKTHDR;
358 bzero(&head->m_pkthdr, sizeof(head->m_pkthdr));
363 m->m_len = min((MCLBYTES - sizeof(struct pkthdr)), pkt_len);
365 if (alloc_mbuf_cluster(sc, desc))
366 return((struct mbuf *)NULL);
367 INC_MD_PTR(start_of_packet, sc->nrdre)
368 desc = sc->recv_ring + start_of_packet;
369 m->m_next = desc->buff.mbuf;
370 } while (start_of_packet != sc->recv_next);
376 static __inline struct mbuf *
377 mbuf_packet(struct lnc_softc *sc, int start_of_packet, int pkt_len)
380 struct host_ring_entry *start;
381 struct mbuf *head,*m,*m_prev;
382 char *data,*mbuf_data;
386 /* Get a pkthdr mbuf for the start of packet */
387 MGETHDR(head, MB_DONTWAIT, MT_DATA);
389 LNCSTATS(drop_packet)
395 start = sc->recv_ring + start_of_packet;
396 /*blen = -(start->md->md2);*/
397 blen = RECVBUFSIZE; /* XXX More PCnet-32 crap */
398 data = start->buff.data;
399 mbuf_data = m->m_data;
401 while (start_of_packet != sc->recv_next) {
403 * If the data left fits in a single buffer then set
404 * blen to the size of the data left.
410 * amount is least of data in current ring buffer and
411 * amount of space left in current mbuf.
413 amount = min(blen, M_TRAILINGSPACE(m));
415 /* mbuf must be empty */
417 MGET(m, MB_DONTWAIT, MT_DATA);
422 if (pkt_len >= MINCLSIZE)
423 MCLGET(m, MB_DONTWAIT);
426 amount = min(blen, M_TRAILINGSPACE(m));
427 mbuf_data = m->m_data;
429 bcopy(data, mbuf_data, amount);
437 start->md->md1 &= HADR;
438 start->md->md1 |= OWN;
439 start->md->md2 = -RECVBUFSIZE; /* XXX - shouldn't be necessary */
440 INC_MD_PTR(start_of_packet, sc->nrdre)
441 start = sc->recv_ring + start_of_packet;
442 data = start->buff.data;
443 /*blen = -(start->md->md2);*/
444 blen = RECVBUFSIZE; /* XXX More PCnet-32 crap */
452 lnc_rint(struct lnc_softc *sc)
454 struct ifnet *ifp = &sc->arpcom.ac_if;
455 struct host_ring_entry *next, *start;
458 struct ether_header *eh;
464 * The LANCE will issue a RINT interrupt when the ownership of the
465 * last buffer of a receive packet has been relinquished by the LANCE.
466 * Therefore, it can be assumed that a complete packet can be found
467 * before hitting buffers that are still owned by the LANCE, if not
468 * then there is a bug in the driver that is causing the descriptors
469 * to get out of sync.
473 if ((sc->recv_ring + sc->recv_next)->md->md1 & OWN) {
474 int unit = ifp->if_dunit;
475 log(LOG_ERR, "lnc%d: Receive interrupt with buffer still owned by controller -- Resetting\n", unit);
479 if (!((sc->recv_ring + sc->recv_next)->md->md1 & STP)) {
480 int unit = ifp->if_dunit;
481 log(LOG_ERR, "lnc%d: Receive interrupt but not start of packet -- Resetting\n", unit);
488 next = sc->recv_ring + sc->recv_next;
489 while ((flags = next->md->md1) & STP) {
491 /* Make a note of the start of the packet */
492 start_of_packet = sc->recv_next;
495 * Find the end of the packet. Even if not data chaining,
496 * jabber packets can overrun into a second descriptor.
497 * If there is no error, then the ENP flag is set in the last
498 * descriptor of the packet. If there is an error then the ERR
499 * flag will be set in the descriptor where the error occured.
500 * Therefore, to find the last buffer of a packet we search for
504 if (!(flags & (ENP | MDERR))) {
506 INC_MD_PTR(sc->recv_next, sc->nrdre)
507 next = sc->recv_ring + sc->recv_next;
508 flags = next->md->md1;
509 } while (!(flags & (STP | OWN | ENP | MDERR)));
512 int unit = ifp->if_dunit;
513 log(LOG_ERR, "lnc%d: Start of packet found before end of previous in receive ring -- Resetting\n", unit);
520 * Looked ahead into a packet still
523 sc->recv_next = start_of_packet;
526 int unit = ifp->if_dunit;
527 log(LOG_ERR, "lnc%d: End of received packet not found-- Resetting\n", unit);
534 pkt_len = (next->md->md3 & MCNT) - FCS_LEN;
536 /* Move pointer onto start of next packet */
537 INC_MD_PTR(sc->recv_next, sc->nrdre)
538 next = sc->recv_ring + sc->recv_next;
541 int unit = ifp->if_dunit;
544 log(LOG_ERR, "lnc%d: Receive buffer error\n", unit);
547 /* OFLO only valid if ENP is not set */
548 if (!(flags & ENP)) {
550 log(LOG_ERR, "lnc%d: Receive overflow error \n", unit);
552 } else if (flags & ENP) {
553 if ((ifp->if_flags & IFF_PROMISC)==0) {
555 * FRAM and CRC are valid only if ENP
556 * is set and OFLO is not.
560 log(LOG_ERR, "lnc%d: Framing error\n", unit);
562 * FRAM is only set if there's a CRC
563 * error so avoid multiple messages
565 } else if (flags & CRC) {
567 log(LOG_ERR, "lnc%d: Receive CRC error\n", unit);
575 while (start_of_packet != sc->recv_next) {
576 start = sc->recv_ring + start_of_packet;
577 start->md->md2 = -RECVBUFSIZE; /* XXX - shouldn't be necessary */
578 start->md->md1 &= HADR;
579 start->md->md1 |= OWN;
580 INC_MD_PTR(start_of_packet, sc->nrdre)
582 } else { /* Valid packet */
587 if (sc->nic.mem_mode == DMA_MBUF)
588 head = chain_mbufs(sc, start_of_packet, pkt_len);
590 head = mbuf_packet(sc, start_of_packet, pkt_len);
594 * First mbuf in packet holds the
595 * ethernet and packet headers
597 head->m_pkthdr.rcvif = ifp;
598 head->m_pkthdr.len = pkt_len ;
599 eh = mtod(head, struct ether_header *);
602 * vmware ethernet hardware emulation loops
603 * packets back to itself, violates IFF_SIMPLEX.
604 * drop it if it is from myself.
606 if (bcmp(eh->ether_shost,
607 sc->arpcom.ac_enaddr, ETHER_ADDR_LEN) == 0) {
610 (ifp->if_input)(ifp, head);
613 int unit = ifp->if_dunit;
614 log(LOG_ERR,"lnc%d: Packet dropped, no mbufs\n",unit);
615 LNCSTATS(drop_packet)
623 * At this point all completely received packets have been processed
624 * so clear RINT since any packets that have arrived while we were in
625 * here have been dealt with.
628 lnc_outw(sc->rdp, RINT | INEA);
632 lnc_tint(struct lnc_softc *sc)
634 struct host_ring_entry *next, *start;
639 * If the driver is reset in this routine then we return immediately to
640 * the interrupt driver routine. Any interrupts that have occured
641 * since the reset will be dealt with there. sc->trans_next
642 * should point to the start of the first packet that was awaiting
643 * transmission after the last transmit interrupt was dealt with. The
644 * LANCE should have relinquished ownership of that descriptor before
645 * the interrupt. Therefore, sc->trans_next should point to a
646 * descriptor with STP set and OWN cleared. If not then the driver's
647 * pointers are out of sync with the LANCE, which signifies a bug in
648 * the driver. Therefore, the following two checks are really
649 * diagnostic, since if the driver is working correctly they should
654 if ((sc->trans_ring + sc->trans_next)->md->md1 & OWN) {
655 int unit = sc->arpcom.ac_if.if_dunit;
656 log(LOG_ERR, "lnc%d: Transmit interrupt with buffer still owned by controller -- Resetting\n", unit);
664 * The LANCE will write the status information for the packet it just
665 * tried to transmit in one of two places. If the packet was
666 * transmitted successfully then the status will be written into the
667 * last descriptor of the packet. If the transmit failed then the
668 * status will be written into the descriptor that was being accessed
669 * when the error occured and all subsequent descriptors in that
670 * packet will have been relinquished by the LANCE.
672 * At this point we know that sc->trans_next points to the start
673 * of a packet that the LANCE has just finished trying to transmit.
674 * We now search for a buffer with either ENP or ERR set.
680 start_of_packet = sc->trans_next;
681 next = sc->trans_ring + sc->trans_next;
684 if (!(next->md->md1 & STP)) {
685 int unit = sc->arpcom.ac_if.if_dunit;
686 log(LOG_ERR, "lnc%d: Transmit interrupt but not start of packet -- Resetting\n", unit);
693 * Find end of packet.
696 if (!(next->md->md1 & (ENP | MDERR))) {
698 INC_MD_PTR(sc->trans_next, sc->ntdre)
699 next = sc->trans_ring + sc->trans_next;
700 } while (!(next->md->md1 & (STP | OWN | ENP | MDERR)));
702 if (next->md->md1 & STP) {
703 int unit = sc->arpcom.ac_if.if_dunit;
704 log(LOG_ERR, "lnc%d: Start of packet found before end of previous in transmit ring -- Resetting\n", unit);
708 if (next->md->md1 & OWN) {
711 * Looked ahead into a packet still
714 sc->trans_next = start_of_packet;
717 int unit = sc->arpcom.ac_if.if_dunit;
718 log(LOG_ERR, "lnc%d: End of transmitted packet not found -- Resetting\n", unit);
725 * Check for ERR first since other flags are irrelevant if an
728 if (next->md->md1 & MDERR) {
730 int unit = sc->arpcom.ac_if.if_dunit;
733 sc->arpcom.ac_if.if_oerrors++;
735 if (next->md->md3 & LCOL) {
737 log(LOG_ERR, "lnc%d: Transmit late collision -- Net error?\n", unit);
738 sc->arpcom.ac_if.if_collisions++;
740 * Clear TBUFF since it's not valid when LCOL
743 next->md->md3 &= ~TBUFF;
745 if (next->md->md3 & LCAR) {
747 log(LOG_ERR, "lnc%d: Loss of carrier during transmit -- Net error?\n", unit);
749 if (next->md->md3 & RTRY) {
751 log(LOG_ERR, "lnc%d: Transmit of packet failed after 16 attempts -- TDR = %d\n", unit, ((sc->trans_ring + sc->trans_next)->md->md3 & TDR));
752 sc->arpcom.ac_if.if_collisions += 16;
754 * Clear TBUFF since it's not valid when RTRY
757 next->md->md3 &= ~TBUFF;
760 * TBUFF is only valid if neither LCOL nor RTRY are set.
761 * We need to check UFLO after LCOL and RTRY so that we
762 * know whether or not TBUFF is valid. If either are
763 * set then TBUFF will have been cleared above. A
764 * UFLO error will turn off the transmitter so we
769 if (next->md->md3 & UFLO) {
772 * If an UFLO has occured it's possibly due
775 if (next->md->md3 & TBUFF) {
777 log(LOG_ERR, "lnc%d: Transmit buffer error -- Resetting\n", unit);
779 log(LOG_ERR, "lnc%d: Transmit underflow error -- Resetting\n", unit);
784 INC_MD_PTR(sc->trans_next, sc->ntdre)
785 next = sc->trans_ring + sc->trans_next;
786 } while (!(next->md->md1 & STP) && (sc->trans_next != sc->next_to_send));
790 * Since we check for ERR first then if we get here
791 * the packet was transmitted correctly. There may
792 * still have been non-fatal errors though.
793 * Don't bother checking for DEF, waste of time.
796 sc->arpcom.ac_if.if_opackets++;
798 if (next->md->md1 & MORE) {
800 sc->arpcom.ac_if.if_collisions += 2;
804 * ONE is invalid if LCOL is set. If LCOL was set then
805 * ERR would have also been set and we would have
806 * returned from lnc_tint above. Therefore we can
807 * assume if we arrive here that ONE is valid.
811 if (next->md->md1 & ONE) {
813 sc->arpcom.ac_if.if_collisions++;
815 INC_MD_PTR(sc->trans_next, sc->ntdre)
816 next = sc->trans_ring + sc->trans_next;
820 * Clear descriptors and free any mbufs.
824 start = sc->trans_ring + start_of_packet;
825 start->md->md1 &= HADR;
826 if (sc->nic.mem_mode == DMA_MBUF) {
827 /* Cache clusters on a local queue */
828 if ((start->buff.mbuf->m_flags & M_EXT) && (sc->mbuf_count < MBUF_CACHE_LIMIT)) {
829 if (sc->mbuf_count) {
830 start->buff.mbuf->m_next = sc->mbufs;
831 sc->mbufs = start->buff.mbuf;
833 sc->mbufs = start->buff.mbuf;
835 start->buff.mbuf = 0;
837 m_free(start->buff.mbuf);
838 start->buff.mbuf = NULL;
841 sc->pending_transmits--;
842 INC_MD_PTR(start_of_packet, sc->ntdre)
843 }while (start_of_packet != sc->trans_next);
846 * There's now at least one free descriptor
847 * in the ring so indicate that we can accept
848 * more packets again.
851 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
855 } while (sc->pending_transmits && !(next->md->md1 & OWN));
858 * Clear TINT since we've dealt with all
859 * the completed transmissions.
862 lnc_outw(sc->rdp, TINT | INEA);
866 lnc_attach_common(device_t dev)
868 lnc_softc_t *sc = device_get_softc(dev);
869 struct ifnet *ifp = &sc->arpcom.ac_if;
873 switch (sc->nic.ident) {
883 /* Set default mode */
884 sc->nic.mode = NORMAL;
886 /* Fill in arpcom structure entries */
889 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
890 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
892 ifp->if_start = lnc_start;
893 ifp->if_ioctl = lnc_ioctl;
894 ifp->if_watchdog = lnc_watchdog;
895 ifp->if_init = lnc_init;
896 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
897 ifq_set_ready(&ifp->if_snd);
899 /* Extract MAC address from PROM */
900 for (i = 0; i < ETHER_ADDR_LEN; i++)
901 sc->arpcom.ac_enaddr[i] = lnc_inb(i * skip);
904 * XXX -- should check return status of if_attach
907 ether_ifattach(&sc->arpcom.ac_if, sc->arpcom.ac_enaddr);
909 if (sc->nic.ic == LANCE || sc->nic.ic == C_LANCE)
910 if_printf(ifp, "%s (%s)", nic_ident[sc->nic.ident],
911 ic_ident[sc->nic.ic]);
913 if_printf(ifp, "%s\n", ic_ident[sc->nic.ic]);
922 struct lnc_softc *sc = xsc;
926 /* Check that interface has valid address */
928 if (TAILQ_EMPTY(&sc->arpcom.ac_if.if_addrhead)) { /* XXX unlikely */
929 printf("XXX no address?\n");
933 /* Shut down interface */
937 sc->arpcom.ac_if.if_flags |= IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; /* XXX??? */
940 * This sets up the memory area for the controller. Memory is set up for
941 * the initialisation block (12 words of contiguous memory starting
942 * on a word boundary),the transmit and receive ring structures (each
943 * entry is 4 words long and must start on a quadword boundary) and
946 * The alignment tests are particularly paranoid.
950 sc->trans_ring = sc->recv_ring + NDESC(sc->nrdre);
953 if (sc->nic.mem_mode == SHMEM)
954 lnc_mem = (char *) sc->nic.iobase;
956 lnc_mem = (char *) (sc->trans_ring + NDESC(sc->ntdre));
958 lnc_mem = (char *)(((int)lnc_mem + 1) & ~1);
959 sc->init_block = (struct init_block *) ((int) lnc_mem & ~1);
960 lnc_mem = (char *) (sc->init_block + 1);
961 lnc_mem = (char *)(((int)lnc_mem + 7) & ~7);
963 /* Initialise pointers to descriptor entries */
964 for (i = 0; i < NDESC(sc->nrdre); i++) {
965 (sc->recv_ring + i)->md = (struct mds *) lnc_mem;
966 lnc_mem += sizeof(struct mds);
968 for (i = 0; i < NDESC(sc->ntdre); i++) {
969 (sc->trans_ring + i)->md = (struct mds *) lnc_mem;
970 lnc_mem += sizeof(struct mds);
973 /* Initialise the remaining ring entries */
975 if (sc->nic.mem_mode == DMA_MBUF) {
980 /* Free previously allocated mbufs */
981 if (sc->flags & LNC_INITIALISED)
985 for (i = 0; i < NDESC(sc->nrdre); i++) {
986 if (alloc_mbuf_cluster(sc, sc->recv_ring+i)) {
987 log(LOG_ERR, "Initialisation failed -- no mbufs\n");
993 for (i = 0; i < NDESC(sc->ntdre); i++) {
994 (sc->trans_ring + i)->buff.mbuf = 0;
995 (sc->trans_ring + i)->md->md0 = 0;
996 (sc->trans_ring + i)->md->md1 = 0;
997 (sc->trans_ring + i)->md->md2 = 0;
998 (sc->trans_ring + i)->md->md3 = 0;
1001 for (i = 0; i < NDESC(sc->nrdre); i++) {
1002 (sc->recv_ring + i)->md->md0 = kvtop(lnc_mem);
1003 (sc->recv_ring + i)->md->md1 = ((kvtop(lnc_mem) >> 16) & 0xff) | OWN;
1004 (sc->recv_ring + i)->md->md2 = -RECVBUFSIZE;
1005 (sc->recv_ring + i)->md->md3 = 0;
1006 (sc->recv_ring + i)->buff.data = lnc_mem;
1007 lnc_mem += RECVBUFSIZE;
1009 for (i = 0; i < NDESC(sc->ntdre); i++) {
1010 (sc->trans_ring + i)->md->md0 = kvtop(lnc_mem);
1011 (sc->trans_ring + i)->md->md1 = ((kvtop(lnc_mem) >> 16) & 0xff);
1012 (sc->trans_ring + i)->md->md2 = 0;
1013 (sc->trans_ring + i)->md->md3 = 0;
1014 (sc->trans_ring + i)->buff.data = lnc_mem;
1015 lnc_mem += TRANSBUFSIZE;
1019 sc->next_to_send = 0;
1021 /* Set up initialisation block */
1023 sc->init_block->mode = sc->nic.mode;
1025 for (i = 0; i < ETHER_ADDR_LEN; i++)
1026 sc->init_block->padr[i] = sc->arpcom.ac_enaddr[i];
1030 sc->init_block->rdra = kvtop(sc->recv_ring->md);
1031 sc->init_block->rlen = ((kvtop(sc->recv_ring->md) >> 16) & 0xff) | (sc->nrdre << 13);
1032 sc->init_block->tdra = kvtop(sc->trans_ring->md);
1033 sc->init_block->tlen = ((kvtop(sc->trans_ring->md) >> 16) & 0xff) | (sc->ntdre << 13);
1036 /* Set flags to show that the memory area is valid */
1037 sc->flags |= LNC_INITIALISED;
1039 sc->pending_transmits = 0;
1041 /* Give the LANCE the physical address of the initialisation block */
1043 if (sc->nic.ic == PCnet_Home) {
1045 /* Set PHY_SEL to HomeRun */
1046 media = read_bcr(sc, BCR49);
1049 write_bcr(sc, BCR49, media);
1052 write_csr(sc, CSR1, kvtop(sc->init_block));
1053 write_csr(sc, CSR2, (kvtop(sc->init_block) >> 16) & 0xff);
1056 * Depending on which controller this is, CSR3 has different meanings.
1057 * For the Am7990 it controls DMA operations, for the Am79C960 it
1058 * controls interrupt masks and transmitter algorithms. In either
1059 * case, none of the flags are set.
1063 write_csr(sc, CSR3, 0);
1065 /* Let's see if it starts */
1067 printf("Enabling lnc interrupts\n");
1068 sc->arpcom.ac_if.if_timer = 10;
1069 write_csr(sc, CSR0, INIT|INEA);
1073 * Now that the initialisation is complete there's no reason to
1074 * access anything except CSR0, so we leave RAP pointing there
1075 * so we can just access RDP from now on, saving an outw each
1079 write_csr(sc, CSR0, INIT);
1080 for(i=0; i < 1000; i++)
1081 if (read_csr(sc, CSR0) & IDON)
1084 if (read_csr(sc, CSR0) & IDON) {
1086 * Enable interrupts, start the LANCE, mark the interface as
1087 * running and transmit any pending packets.
1089 write_csr(sc, CSR0, STRT | INEA);
1090 sc->arpcom.ac_if.if_flags |= IFF_RUNNING;
1091 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
1092 lnc_start(&sc->arpcom.ac_if);
1094 log(LOG_ERR, "%s: Initialisation failed\n",
1095 sc->arpcom.ac_if.if_xname);
1101 * The interrupt flag (INTR) will be set and provided that the interrupt enable
1102 * flag (INEA) is also set, the interrupt pin will be driven low when any of
1103 * the following occur:
1105 * 1) Completion of the initialisation routine (IDON). 2) The reception of a
1106 * packet (RINT). 3) The transmission of a packet (TINT). 4) A transmitter
1107 * timeout error (BABL). 5) A missed packet (MISS). 6) A memory error (MERR).
1109 * The interrupt flag is cleared when all of the above conditions are cleared.
1111 * If the driver is reset from this routine then it first checks to see if any
1112 * interrupts have ocurred since the reset and handles them before returning.
1113 * This is because the NIC may signify a pending interrupt in CSR0 using the
1114 * INTR flag even if a hardware interrupt is currently inhibited (at least I
1115 * think it does from reading the data sheets). We may as well deal with
1116 * these pending interrupts now rather than get the overhead of another
1117 * hardware interrupt immediately upon returning from the interrupt handler.
1124 lnc_softc_t *sc = arg;
1125 int unit = sc->arpcom.ac_if.if_dunit;
1129 * INEA is the only bit that can be cleared by writing a 0 to it so
1130 * we have to include it in any writes that clear other flags.
1133 while ((csr0 = lnc_inw(sc->rdp)) & INTR) {
1136 * Clear interrupt flags early to avoid race conditions. The
1137 * controller can still set these flags even while we're in
1138 * this interrupt routine. If the flag is still set from the
1139 * event that caused this interrupt any new events will
1143 lnc_outw(sc->rdp, csr0);
1144 /*lnc_outw(sc->rdp, IDON | CERR | BABL | MISS | MERR | RINT | TINT | INEA);*/
1149 sc->arpcom.ac_if.if_timer = 0;
1150 write_csr(sc, CSR0, STRT | INEA);
1151 sc->arpcom.ac_if.if_flags |= IFF_RUNNING;
1152 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
1153 lnc_start(&sc->arpcom.ac_if);
1160 log(LOG_ERR, "lnc%d: Heartbeat error -- SQE test failed\n", unit);
1164 log(LOG_ERR, "lnc%d: Babble error - more than 1519 bytes transmitted\n", unit);
1166 sc->arpcom.ac_if.if_oerrors++;
1169 log(LOG_ERR, "lnc%d: Missed packet -- no receive buffer\n", unit);
1171 sc->arpcom.ac_if.if_ierrors++;
1174 log(LOG_ERR, "lnc%d: Memory error -- Resetting\n", unit);
1186 sc->arpcom.ac_if.if_timer = 0;
1191 * If there's room in the transmit descriptor ring then queue
1192 * some more transmit packets.
1195 if (!(sc->arpcom.ac_if.if_flags & IFF_OACTIVE))
1196 lnc_start(&sc->arpcom.ac_if);
1201 mbuf_to_buffer(struct mbuf *m, char *buffer)
1206 for( ; m; m = m->m_next) {
1207 bcopy(mtod(m, caddr_t), buffer, m->m_len);
1215 static __inline struct mbuf *
1216 chain_to_cluster(struct mbuf *m)
1220 MGET(new, MB_DONTWAIT, MT_DATA);
1222 MCLGET(new, MB_DONTWAIT);
1223 if (new->m_ext.ext_buf) {
1224 new->m_len = mbuf_to_buffer(m, new->m_data);
1234 * IFF_OACTIVE and IFF_RUNNING are checked in ether_output so it's redundant
1235 * to check them again since we wouldn't have got here if they were not
1236 * appropriately set. This is also called from lnc_init and lncintr but the
1237 * flags should be ok at those points too.
1241 lnc_start(struct ifnet *ifp)
1244 struct lnc_softc *sc = ifp->if_softc;
1245 struct host_ring_entry *desc;
1248 struct mbuf *head, *m;
1251 int no_entries_needed;
1254 head = ifq_dequeue(&sc->arpcom.ac_if.if_snd);
1258 if (sc->nic.mem_mode == DMA_MBUF) {
1260 no_entries_needed = 0;
1261 for (m=head; m; m = m->m_next)
1262 no_entries_needed++;
1265 * We try and avoid bcopy as much as possible
1266 * but there are two cases when we use it.
1268 * 1) If there are not enough free entries in the ring
1269 * to hold each mbuf in the chain then compact the
1270 * chain into a single cluster.
1272 * 2) The Am7990 and Am79C90 must not have less than
1273 * 100 bytes in the first descriptor of a chained
1274 * packet so it's necessary to shuffle the mbuf
1275 * contents to ensure this.
1279 if (no_entries_needed > (NDESC(sc->ntdre) - sc->pending_transmits)) {
1280 if (!(head = chain_to_cluster(head))) {
1281 log(LOG_ERR, "%s: Couldn't get mbuf for transmit packet -- Resetting \n ",ifp->if_xname);
1285 } else if ((sc->nic.ic == LANCE) || (sc->nic.ic == C_LANCE)) {
1286 if ((head->m_len < 100) && (head->m_next)) {
1287 len = 100 - head->m_len;
1288 if (M_TRAILINGSPACE(head) < len) {
1290 * Move data to start of data
1291 * area. We assume the first
1292 * mbuf has a packet header
1293 * and is not a cluster.
1295 bcopy((caddr_t)head->m_data, (caddr_t)head->m_pktdat, head->m_len);
1296 head->m_data = head->m_pktdat;
1299 while (m && (len > 0)) {
1300 chunk = min(len, m->m_len);
1301 bcopy(mtod(m, caddr_t), mtod(head, caddr_t) + head->m_len, chunk);
1303 head->m_len += chunk;
1306 if (m->m_len <= 0) {
1314 tmp = sc->next_to_send;
1317 * On entering this loop we know that tmp points to a
1318 * descriptor with a clear OWN bit.
1321 desc = sc->trans_ring + tmp;
1322 len = ETHER_MIN_LEN;
1323 for (m = head; m; m = m->m_next) {
1324 desc->buff.mbuf = m;
1325 addr = kvtop(m->m_data);
1326 desc->md->md0 = addr;
1327 desc->md->md1 = ((addr >> 16) & 0xff);
1329 desc->md->md2 = -m->m_len;
1330 sc->pending_transmits++;
1333 INC_MD_PTR(tmp, sc->ntdre)
1334 desc = sc->trans_ring + tmp;
1337 end_of_packet = tmp;
1338 DEC_MD_PTR(tmp, sc->ntdre)
1339 desc = sc->trans_ring + tmp;
1340 desc->md->md1 |= ENP;
1343 desc->md->md2 -= len;
1346 * Set OWN bits in reverse order, otherwise the Lance
1347 * could start sending the packet before all the
1348 * buffers have been relinquished by the host.
1351 while (tmp != sc->next_to_send) {
1352 desc->md->md1 |= OWN;
1353 DEC_MD_PTR(tmp, sc->ntdre)
1354 desc = sc->trans_ring + tmp;
1356 sc->next_to_send = end_of_packet;
1357 desc->md->md1 |= STP | OWN;
1359 sc->pending_transmits++;
1360 desc = sc->trans_ring + sc->next_to_send;
1361 len = mbuf_to_buffer(head, desc->buff.data);
1363 desc->md->md2 = -max(len, ETHER_MIN_LEN - ETHER_CRC_LEN);
1364 desc->md->md1 |= OWN | STP | ENP;
1365 INC_MD_PTR(sc->next_to_send, sc->ntdre)
1368 /* Force an immediate poll of the transmit ring */
1369 lnc_outw(sc->rdp, TDMD | INEA);
1372 * Set a timer so if the buggy Am7990.h shuts
1373 * down we can wake it up.
1378 BPF_MTAP(&sc->arpcom.ac_if, head);
1380 if (sc->nic.mem_mode != DMA_MBUF)
1383 } while (sc->pending_transmits < NDESC(sc->ntdre));
1386 * Transmit ring is full so set IFF_OACTIVE
1387 * since we can't buffer any more packets.
1390 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
1391 LNCSTATS(trans_ring_full)
1395 lnc_ioctl(struct ifnet * ifp, u_long command, caddr_t data, struct ucred *cr)
1398 struct lnc_softc *sc = ifp->if_softc;
1407 error = ether_ioctl(ifp, command, data);
1412 if (ifp->if_flags & IFF_DEBUG)
1417 if (ifp->if_flags & IFF_PROMISC) {
1418 if (!(sc->nic.mode & PROM)) {
1419 sc->nic.mode |= PROM;
1422 } else if (sc->nic.mode & PROM) {
1423 sc->nic.mode &= ~PROM;
1427 if ((ifp->if_flags & IFF_ALLMULTI) &&
1428 !(sc->flags & LNC_ALLMULTI)) {
1429 sc->flags |= LNC_ALLMULTI;
1431 } else if (!(ifp->if_flags & IFF_ALLMULTI) &&
1432 (sc->flags & LNC_ALLMULTI)) {
1433 sc->flags &= ~LNC_ALLMULTI;
1437 if ((ifp->if_flags & IFF_UP) == 0 &&
1438 (ifp->if_flags & IFF_RUNNING) != 0) {
1440 * If interface is marked down and it is running,
1444 ifp->if_flags &= ~IFF_RUNNING;
1445 } else if ((ifp->if_flags & IFF_UP) != 0 &&
1446 (ifp->if_flags & IFF_RUNNING) == 0) {
1448 * If interface is marked up and it is stopped, then
1467 lnc_watchdog(struct ifnet *ifp)
1469 log(LOG_ERR, "%s: Device timeout -- Resetting\n", ifp->if_xname);
1471 lnc_reset(ifp->if_softc);
1476 lnc_dump_state(struct lnc_softc *sc)
1480 printf("\nDriver/NIC [%d] state dump\n", sc->arpcom.ac_if.if_dunit);
1481 printf("Memory access mode: %b\n", sc->nic.mem_mode, MEM_MODES);
1482 printf("Host memory\n");
1483 printf("-----------\n");
1485 printf("Receive ring: base = %p, next = %p\n",
1486 (void *)sc->recv_ring, (void *)(sc->recv_ring + sc->recv_next));
1487 for (i = 0; i < NDESC(sc->nrdre); i++)
1488 printf("\t%d:%p md = %p buff = %p\n",
1489 i, (void *)(sc->recv_ring + i),
1490 (void *)(sc->recv_ring + i)->md,
1491 (void *)(sc->recv_ring + i)->buff.data);
1493 printf("Transmit ring: base = %p, next = %p\n",
1494 (void *)sc->trans_ring, (void *)(sc->trans_ring + sc->trans_next));
1495 for (i = 0; i < NDESC(sc->ntdre); i++)
1496 printf("\t%d:%p md = %p buff = %p\n",
1497 i, (void *)(sc->trans_ring + i),
1498 (void *)(sc->trans_ring + i)->md,
1499 (void *)(sc->trans_ring + i)->buff.data);
1500 printf("Lance memory (may be on host(DMA) or card(SHMEM))\n");
1501 printf("Init block = %p\n", (void *)sc->init_block);
1502 printf("\tmode = %b rlen:rdra = %x:%x tlen:tdra = %x:%x\n",
1503 sc->init_block->mode, INIT_MODE, sc->init_block->rlen,
1504 sc->init_block->rdra, sc->init_block->tlen, sc->init_block->tdra);
1505 printf("Receive descriptor ring\n");
1506 for (i = 0; i < NDESC(sc->nrdre); i++)
1507 printf("\t%d buffer = 0x%x%x, BCNT = %d,\tMCNT = %u,\tflags = %b\n",
1508 i, ((sc->recv_ring + i)->md->md1 & HADR),
1509 (sc->recv_ring + i)->md->md0,
1510 -(short) (sc->recv_ring + i)->md->md2,
1511 (sc->recv_ring + i)->md->md3,
1512 (((sc->recv_ring + i)->md->md1 & ~HADR) >> 8), RECV_MD1);
1513 printf("Transmit descriptor ring\n");
1514 for (i = 0; i < NDESC(sc->ntdre); i++)
1515 printf("\t%d buffer = 0x%x%x, BCNT = %d,\tflags = %b %b\n",
1516 i, ((sc->trans_ring + i)->md->md1 & HADR),
1517 (sc->trans_ring + i)->md->md0,
1518 -(short) (sc->trans_ring + i)->md->md2,
1519 ((sc->trans_ring + i)->md->md1 >> 8), TRANS_MD1,
1520 ((sc->trans_ring + i)->md->md3 >> 10), TRANS_MD3);
1521 printf("\nnext_to_send = %x\n", sc->next_to_send);
1522 printf("\n CSR0 = %b CSR1 = %x CSR2 = %x CSR3 = %x\n\n",
1523 read_csr(sc, CSR0), CSR0_FLAGS, read_csr(sc, CSR1),
1524 read_csr(sc, CSR2), read_csr(sc, CSR3));
1526 /* Set RAP back to CSR0 */
1527 lnc_outw(sc->rap, CSR0);
1531 mbuf_dump_chain(struct mbuf * m)
1534 #define MBUF_FLAGS \
1535 "\20\1M_EXT\2M_PKTHDR\3M_EOR\4UNKNOWN\5M_BCAST\6M_MCAST"
1538 log(LOG_DEBUG, "m == NULL\n");
1540 log(LOG_DEBUG, "m = %p\n", (void *)m);
1541 log(LOG_DEBUG, "m_hdr.mh_next = %p\n",
1542 (void *)m->m_hdr.mh_next);
1543 log(LOG_DEBUG, "m_hdr.mh_nextpkt = %p\n",
1544 (void *)m->m_hdr.mh_nextpkt);
1545 log(LOG_DEBUG, "m_hdr.mh_len = %d\n", m->m_hdr.mh_len);
1546 log(LOG_DEBUG, "m_hdr.mh_data = %p\n",
1547 (void *)m->m_hdr.mh_data);
1548 log(LOG_DEBUG, "m_hdr.mh_type = %d\n", m->m_hdr.mh_type);
1549 log(LOG_DEBUG, "m_hdr.mh_flags = %b\n", m->m_hdr.mh_flags,
1551 if (!(m->m_hdr.mh_flags & (M_PKTHDR | M_EXT)))
1552 log(LOG_DEBUG, "M_dat.M_databuf = %p\n",
1553 (void *)m->M_dat.M_databuf);
1555 if (m->m_hdr.mh_flags & M_PKTHDR) {
1556 log(LOG_DEBUG, "M_dat.MH.MH_pkthdr.len = %d\n",
1557 m->M_dat.MH.MH_pkthdr.len);
1559 "M_dat.MH.MH_pkthdr.rcvif = %p\n",
1560 (void *)m->M_dat.MH.MH_pkthdr.rcvif);
1561 if (!(m->m_hdr.mh_flags & M_EXT))
1563 "M_dat.MH.MH_dat.MH_databuf = %p\n",
1564 (void *)m->M_dat.MH.MH_dat.MH_databuf);
1566 if (m->m_hdr.mh_flags & M_EXT) {
1568 "M_dat.MH.MH_dat.MH_ext.ext_buff %p\n",
1569 (void *)m->M_dat.MH.MH_dat.MH_ext.ext_buf);
1571 "M_dat.MH.MH_dat.MH_ext.ext_free %p\n",
1572 (void *)m->M_dat.MH.MH_dat.MH_ext.ext_nfree.old);
1574 "M_dat.MH.MH_dat.MH_ext.ext_size %d\n",
1575 m->M_dat.MH.MH_dat.MH_ext.ext_size);
1578 } while ((m = m->m_next) != NULL);