/* $OpenBSD: if_de.c,v 1.20 2008/08/14 11:41:30 martin Exp $ */ /* $NetBSD: if_de.c,v 1.27 1997/04/19 15:02:29 ragge Exp $ */ /* * Copyright (c) 1982, 1986, 1989 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)if_de.c 7.12 (Berkeley) 12/16/90 */ /* * DEC DEUNA interface * * Lou Salkind * New York University * * TODO: * timeout routine (get statistics) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif #include #include #include #include #include #include #define NXMT 3 /* number of transmit buffers */ #define NRCV 7 /* number of receive buffers (must be > 1) */ int dedebug = 0; /* * Ethernet software status per interface. * * Each interface is referenced by a network interface structure, * ds_if, which the routing code uses to locate the interface. * This structure contains the output queue for the interface, its address, ... * We also have, for each interface, a UBA interface structure, which * contains information about the UNIBUS resources held by the interface: * map registers, buffered data paths, etc. Information is cached in this * structure for use by the if_uba.c routines in running the interface * efficiently. */ struct de_softc { struct device ds_dev; /* Configuration common part */ struct arpcom ds_ac; /* Ethernet common part */ struct dedevice *ds_vaddr; /* Virtual address of this interface */ #define ds_if ds_ac.ac_if /* network-visible interface */ int ds_flags; #define DSF_RUNNING 2 /* board is enabled */ #define DSF_SETADDR 4 /* physical address is changed */ int ds_ubaddr; /* map info for incore structs */ struct ifubinfo ds_deuba; /* unibus resource structure */ struct ifrw ds_ifr[NRCV]; /* unibus receive maps */ struct ifxmt ds_ifw[NXMT]; /* unibus xmt maps */ /* the following structures are always mapped in */ struct de_pcbb ds_pcbb; /* port control block */ struct de_ring ds_xrent[NXMT]; /* transmit ring entries */ struct de_ring ds_rrent[NRCV]; /* receive ring entries */ struct de_udbbuf ds_udbbuf; /* UNIBUS data buffer */ /* end mapped area */ #define INCORE_BASE(p) ((char *)&(p)->ds_pcbb) #define RVAL_OFF(s,n) ((char *)&(s)->n - INCORE_BASE(s)) #define LVAL_OFF(s,n) ((char *)(s)->n - INCORE_BASE(s)) #define PCBB_OFFSET(s) RVAL_OFF(s,ds_pcbb) #define XRENT_OFFSET(s) LVAL_OFF(s,ds_xrent) #define RRENT_OFFSET(s) LVAL_OFF(s,ds_rrent) #define UDBBUF_OFFSET(s) RVAL_OFF(s,ds_udbbuf) #define INCORE_SIZE(s) RVAL_OFF(s, ds_xindex) int ds_xindex; /* UNA index into transmit chain */ int ds_rindex; /* UNA index into receive chain */ int ds_xfree; /* index for next transmit buffer */ int ds_nxmit; /* # of transmits in progress */ }; int dematch(struct device *, void *, void *); void deattach(struct device *, struct device *, void *); int dewait(struct de_softc *, char *); void deinit(struct de_softc *); int deioctl(struct ifnet *, u_long, caddr_t); void dereset(int); void destart(struct ifnet *); void deread(struct de_softc *, struct ifrw *, int); void derecv(int); void de_setaddr(u_char *, struct de_softc *); void deintr(int); struct cfdriver de_cd = { NULL, "de", DV_IFNET }; struct cfattach de_ca = { sizeof(struct de_softc), dematch, deattach }; /* * Interface exists: make available by filling in network interface * record. System will initialize the interface when it is ready * to accept packets. We get the ethernet address here. */ void deattach(parent, self, aux) struct device *parent, *self; void *aux; { struct uba_attach_args *ua = aux; struct de_softc *ds = (struct de_softc *)self; struct ifnet *ifp = &ds->ds_if; struct dedevice *addr; char *c; int csr1; u_int8_t myaddr[ETHER_ADDR_LEN]; addr = (struct dedevice *)ua->ua_addr; ds->ds_vaddr = addr; bcopy(ds->ds_dev.dv_xname, ifp->if_xname, IFNAMSIZ); ifp->if_softc = ds; ifp->if_flags = IFF_BROADCAST | IFF_NOTRAILERS; /* * What kind of a board is this? * The error bits 4-6 in pcsr1 are a device id as long as * the high byte is zero. */ csr1 = addr->pcsr1; if (csr1 & 0xff60) c = "broken"; else if (csr1 & 0x10) c = "delua"; else c = "deuna"; printf("\n%s: %s\n", ds->ds_dev.dv_xname, c); /* * Reset the board and temporarily map * the pcbb buffer onto the Unibus. */ addr->pcsr0 = 0; /* reset INTE */ DELAY(100); addr->pcsr0 = PCSR0_RSET; (void)dewait(ds, "reset"); ds->ds_ubaddr = uballoc((void *)ds->ds_dev.dv_parent, (char *)&ds->ds_pcbb, sizeof (struct de_pcbb), 0); addr->pcsr2 = ds->ds_ubaddr & 0xffff; addr->pcsr3 = (ds->ds_ubaddr >> 16) & 0x3; addr->pclow = CMD_GETPCBB; (void)dewait(ds, "pcbb"); ds->ds_pcbb.pcbb0 = FC_RDPHYAD; addr->pclow = CMD_GETCMD; (void)dewait(ds, "read addr "); ubarelse((void *)ds->ds_dev.dv_parent, &ds->ds_ubaddr); bcopy((caddr_t)&ds->ds_pcbb.pcbb2, myaddr, sizeof (myaddr)); printf("%s: address %s\n", ds->ds_dev.dv_xname, ether_sprintf(myaddr)); ifp->if_ioctl = deioctl; ifp->if_start = destart; ds->ds_deuba.iff_flags = UBA_CANTWAIT; #ifdef notdef /* CAN WE USE BDP's ??? */ ds->ds_deuba.iff_flags |= UBA_NEEDBDP; #endif if_attach(ifp); ether_ifattach(ifp); } /* * Reset of interface after UNIBUS reset. */ void dereset(unit) int unit; { struct de_softc *sc = de_cd.cd_devs[unit]; volatile struct dedevice *addr = sc->ds_vaddr; printf(" de%d", unit); sc->ds_if.if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); sc->ds_flags &= ~DSF_RUNNING; addr->pcsr0 = PCSR0_RSET; (void)dewait(sc, "reset"); deinit(sc); } /* * Initialization of interface; clear recorded pending * operations, and reinitialize UNIBUS usage. */ void deinit(ds) struct de_softc *ds; { volatile struct dedevice *addr; struct ifnet *ifp = &ds->ds_if; struct ifrw *ifrw; struct ifxmt *ifxp; struct de_ring *rp; int s,incaddr; /* not yet, if address still unknown */ if (TAILQ_EMPTY(&ifp->if_addrlist)) return; if (ds->ds_flags & DSF_RUNNING) return; if ((ifp->if_flags & IFF_RUNNING) == 0) { if (if_ubaminit(&ds->ds_deuba, (void *)ds->ds_dev.dv_parent, sizeof (struct ether_header), (int)vax_atop(ETHERMTU), ds->ds_ifr, NRCV, ds->ds_ifw, NXMT) == 0) { printf("%s: can't initialize\n", ds->ds_dev.dv_xname); ds->ds_if.if_flags &= ~IFF_UP; return; } ds->ds_ubaddr = uballoc((void *)ds->ds_dev.dv_parent, INCORE_BASE(ds), INCORE_SIZE(ds), 0); } addr = ds->ds_vaddr; /* set the pcbb block address */ incaddr = ds->ds_ubaddr + PCBB_OFFSET(ds); addr->pcsr2 = incaddr & 0xffff; addr->pcsr3 = (incaddr >> 16) & 0x3; addr->pclow = 0; /* reset INTE */ DELAY(500); addr->pclow = CMD_GETPCBB; (void)dewait(ds, "pcbb"); /* set the transmit and receive ring header addresses */ incaddr = ds->ds_ubaddr + UDBBUF_OFFSET(ds); ds->ds_pcbb.pcbb0 = FC_WTRING; ds->ds_pcbb.pcbb2 = incaddr & 0xffff; ds->ds_pcbb.pcbb4 = (incaddr >> 16) & 0x3; incaddr = ds->ds_ubaddr + XRENT_OFFSET(ds); ds->ds_udbbuf.b_tdrbl = incaddr & 0xffff; ds->ds_udbbuf.b_tdrbh = (incaddr >> 16) & 0x3; ds->ds_udbbuf.b_telen = sizeof (struct de_ring) / sizeof (short); ds->ds_udbbuf.b_trlen = NXMT; incaddr = ds->ds_ubaddr + RRENT_OFFSET(ds); ds->ds_udbbuf.b_rdrbl = incaddr & 0xffff; ds->ds_udbbuf.b_rdrbh = (incaddr >> 16) & 0x3; ds->ds_udbbuf.b_relen = sizeof (struct de_ring) / sizeof (short); ds->ds_udbbuf.b_rrlen = NRCV; addr->pclow = CMD_GETCMD; (void)dewait(ds, "wtring"); /* initialize the mode - enable hardware padding */ ds->ds_pcbb.pcbb0 = FC_WTMODE; /* let hardware do padding - set MTCH bit on broadcast */ ds->ds_pcbb.pcbb2 = MOD_TPAD|MOD_HDX; addr->pclow = CMD_GETCMD; (void)dewait(ds, "wtmode"); /* set up the receive and transmit ring entries */ ifxp = &ds->ds_ifw[0]; for (rp = &ds->ds_xrent[0]; rp < &ds->ds_xrent[NXMT]; rp++) { rp->r_segbl = ifxp->ifw_info & 0xffff; rp->r_segbh = (ifxp->ifw_info >> 16) & 0x3; rp->r_flags = 0; ifxp++; } ifrw = &ds->ds_ifr[0]; for (rp = &ds->ds_rrent[0]; rp < &ds->ds_rrent[NRCV]; rp++) { rp->r_slen = sizeof (struct de_buf); rp->r_segbl = ifrw->ifrw_info & 0xffff; rp->r_segbh = (ifrw->ifrw_info >> 16) & 0x3; rp->r_flags = RFLG_OWN; /* hang receive */ ifrw++; } /* start up the board (rah rah) */ s = splnet(); ds->ds_rindex = ds->ds_xindex = ds->ds_xfree = ds->ds_nxmit = 0; ds->ds_if.if_flags |= IFF_RUNNING; addr->pclow = PCSR0_INTE; /* avoid interlock */ destart(&ds->ds_if); /* queue output packets */ ds->ds_flags |= DSF_RUNNING; /* need before de_setaddr */ if (ds->ds_flags & DSF_SETADDR) de_setaddr(ds->ds_ac.ac_enaddr, ds); addr->pclow = CMD_START | PCSR0_INTE; splx(s); } /* * Setup output on interface. * Get another datagram to send off of the interface queue, * and map it to the interface before starting the output. * Must be called from ipl >= our interrupt level. */ void destart(ifp) struct ifnet *ifp; { int len; register struct de_softc *ds = ifp->if_softc; volatile struct dedevice *addr = ds->ds_vaddr; register struct de_ring *rp; struct mbuf *m; register int nxmit; /* * the following test is necessary, since * the code is not reentrant and we have * multiple transmission buffers. */ if (ds->ds_if.if_flags & IFF_OACTIVE) return; for (nxmit = ds->ds_nxmit; nxmit < NXMT; nxmit++) { IF_DEQUEUE(&ds->ds_if.if_snd, m); if (m == 0) break; rp = &ds->ds_xrent[ds->ds_xfree]; if (rp->r_flags & XFLG_OWN) panic("deuna xmit in progress"); len = if_ubaput(&ds->ds_deuba, &ds->ds_ifw[ds->ds_xfree], m); if (ds->ds_deuba.iff_flags & UBA_NEEDBDP) { struct uba_softc *uh = (void *)ds->ds_dev.dv_parent; if (uh->uh_ubapurge) (*uh->uh_ubapurge) (uh, ds->ds_ifw[ds->ds_xfree].ifw_bdp); } rp->r_slen = len; rp->r_tdrerr = 0; rp->r_flags = XFLG_STP|XFLG_ENP|XFLG_OWN; ds->ds_xfree++; if (ds->ds_xfree == NXMT) ds->ds_xfree = 0; } if (ds->ds_nxmit != nxmit) { ds->ds_nxmit = nxmit; if (ds->ds_flags & DSF_RUNNING) addr->pclow = PCSR0_INTE|CMD_PDMD; } } /* * Command done interrupt. */ void deintr(unit) int unit; { volatile struct dedevice *addr; register struct de_softc *ds; register struct de_ring *rp; register struct ifxmt *ifxp; short csr0; ds = de_cd.cd_devs[unit]; addr = ds->ds_vaddr; /* save flags right away - clear out interrupt bits */ csr0 = addr->pcsr0; addr->pchigh = csr0 >> 8; ds->ds_if.if_flags |= IFF_OACTIVE; /* prevent entering destart */ /* * if receive, put receive buffer on mbuf * and hang the request again */ derecv(unit); /* * Poll transmit ring and check status. * Be careful about loopback requests. * Then free buffer space and check for * more transmit requests. */ for ( ; ds->ds_nxmit > 0; ds->ds_nxmit--) { rp = &ds->ds_xrent[ds->ds_xindex]; if (rp->r_flags & XFLG_OWN) break; ds->ds_if.if_opackets++; ifxp = &ds->ds_ifw[ds->ds_xindex]; /* check for unusual conditions */ if (rp->r_flags & (XFLG_ERRS|XFLG_MTCH|XFLG_ONE|XFLG_MORE)) { if (rp->r_flags & XFLG_ERRS) { /* output error */ ds->ds_if.if_oerrors++; if (dedebug) { printf("de%d: oerror, flags=%b ", unit, rp->r_flags, XFLG_BITS); printf("tdrerr=%b\n", rp->r_tdrerr, XERR_BITS); } } else if (rp->r_flags & XFLG_ONE) { /* one collision */ ds->ds_if.if_collisions++; } else if (rp->r_flags & XFLG_MORE) { /* more than one collision */ ds->ds_if.if_collisions += 2; /* guess */ } else if (rp->r_flags & XFLG_MTCH) { /* received our own packet */ ds->ds_if.if_ipackets++; deread(ds, &ifxp->ifrw, rp->r_slen - sizeof (struct ether_header)); } } if (ifxp->ifw_xtofree) { m_freem(ifxp->ifw_xtofree); ifxp->ifw_xtofree = 0; } /* check if next transmit buffer also finished */ ds->ds_xindex++; if (ds->ds_xindex == NXMT) ds->ds_xindex = 0; } ds->ds_if.if_flags &= ~IFF_OACTIVE; destart(&ds->ds_if); if (csr0 & PCSR0_RCBI) { if (dedebug) log(LOG_WARNING, "de%d: buffer unavailable\n", unit); addr->pclow = PCSR0_INTE|CMD_PDMD; } } /* * Ethernet interface receiver interface. * If input error just drop packet. * Otherwise purge input buffered data path and examine * packet to determine type. If can't determine length * from type, then have to drop packet. Othewise decapsulate * packet based on type and pass to type specific higher-level * input routine. */ void derecv(unit) int unit; { register struct de_softc *ds = de_cd.cd_devs[unit]; register struct de_ring *rp; int len; rp = &ds->ds_rrent[ds->ds_rindex]; while ((rp->r_flags & RFLG_OWN) == 0) { ds->ds_if.if_ipackets++; if (ds->ds_deuba.iff_flags & UBA_NEEDBDP) { struct uba_softc *uh = (void *)ds->ds_dev.dv_parent; if (uh->uh_ubapurge) (*uh->uh_ubapurge) (uh,ds->ds_ifr[ds->ds_rindex].ifrw_bdp); } len = (rp->r_lenerr&RERR_MLEN) - sizeof (struct ether_header) - 4; /* don't forget checksum! */ /* check for errors */ if ((rp->r_flags & (RFLG_ERRS|RFLG_FRAM|RFLG_OFLO|RFLG_CRC)) || (rp->r_flags&(RFLG_STP|RFLG_ENP)) != (RFLG_STP|RFLG_ENP) || (rp->r_lenerr & (RERR_BUFL|RERR_UBTO|RERR_NCHN)) || len < ETHERMIN || len > ETHERMTU) { ds->ds_if.if_ierrors++; if (dedebug) { printf("de%d: ierror, flags=%b ", unit, rp->r_flags, RFLG_BITS); printf("lenerr=%b (len=%d)\n", rp->r_lenerr, RERR_BITS, len); } } else deread(ds, &ds->ds_ifr[ds->ds_rindex], len); /* hang the receive buffer again */ rp->r_lenerr = 0; rp->r_flags = RFLG_OWN; /* check next receive buffer */ ds->ds_rindex++; if (ds->ds_rindex == NRCV) ds->ds_rindex = 0; rp = &ds->ds_rrent[ds->ds_rindex]; } } /* * Pass a packet to the higher levels. * We deal with the trailer protocol here. */ void deread(ds, ifrw, len) register struct de_softc *ds; struct ifrw *ifrw; int len; { struct ether_header *eh; struct mbuf *m; eh = (struct ether_header *)ifrw->ifrw_addr; if (len == 0) return; /* * Pull packet off interface. Off is nonzero if packet * has trailing header; if_ubaget will then force this header * information to be at the front. */ m = if_ubaget(&ds->ds_deuba, ifrw, len, &ds->ds_if); if (m) { /* * XXX not exactly sure what if_ubaget does. Manually * add the ethernet header to the start of the mbuf chain. */ M_PREPEND(m, sizeof(*eh), M_DONTWAIT); if (m) { *mtod(m, struct ether_header *) = *eh; ether_input_mbuf(&ds->ds_if, m); } } } /* * Process an ioctl request. */ int deioctl(ifp, cmd, data) register struct ifnet *ifp; u_long cmd; caddr_t data; { register struct ifaddr *ifa = (struct ifaddr *)data; register struct de_softc *ds = ifp->if_softc; int s = splnet(), error = 0; switch (cmd) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; deinit(ds); switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: arp_ifinit(&ds->ds_ac, ifa); break; #endif } break; case SIOCSIFFLAGS: if ((ifp->if_flags & IFF_UP) == 0 && ds->ds_flags & DSF_RUNNING) { ds->ds_vaddr->pclow = 0; DELAY(5000); ds->ds_vaddr->pclow = PCSR0_RSET; ds->ds_flags &= ~DSF_RUNNING; ds->ds_if.if_flags &= ~IFF_OACTIVE; } else if (ifp->if_flags & IFF_UP && (ds->ds_flags & DSF_RUNNING) == 0) deinit(ds); break; default: error = EINVAL; } splx(s); return (error); } /* * set ethernet address for unit */ void de_setaddr(physaddr, ds) u_char *physaddr; struct de_softc *ds; { volatile struct dedevice *addr= ds->ds_vaddr; if (! (ds->ds_flags & DSF_RUNNING)) return; bcopy((caddr_t) physaddr, (caddr_t) &ds->ds_pcbb.pcbb2, 6); ds->ds_pcbb.pcbb0 = FC_WTPHYAD; addr->pclow = PCSR0_INTE|CMD_GETCMD; if (dewait(ds, "address change") == 0) { ds->ds_flags |= DSF_SETADDR; bcopy((caddr_t) physaddr, ds->ds_ac.ac_enaddr, 6); } } /* * Await completion of the named function * and check for errors. */ int dewait(ds, fn) register struct de_softc *ds; char *fn; { volatile struct dedevice *addr = ds->ds_vaddr; register int csr0; while ((addr->pcsr0 & PCSR0_INTR) == 0) ; csr0 = addr->pcsr0; addr->pchigh = csr0 >> 8; if (csr0 & PCSR0_PCEI) { printf("de%d: %s failed, csr0=%b ", ds->ds_dev.dv_unit, fn, csr0, PCSR0_BITS); printf("csr1=%b\n", addr->pcsr1, PCSR1_BITS); } return (csr0 & PCSR0_PCEI); } int dematch(parent, cf, aux) struct device *parent; void *cf, *aux; { struct uba_attach_args *ua = aux; volatile struct dedevice *addr = (struct dedevice *)ua->ua_addr; int i; /* * Make sure self-test is finished before we screw with the board. * Self-test on a DELUA can take 15 seconds (argh). */ for (i = 0; i < 160 && (addr->pcsr0 & PCSR0_FATI) == 0 && (addr->pcsr1 & PCSR1_STMASK) == STAT_RESET; ++i) DELAY(50000); if (((addr->pcsr0 & PCSR0_FATI) != 0) || (((addr->pcsr1 & PCSR1_STMASK) != STAT_READY) && ((addr->pcsr1 & PCSR1_STMASK) != STAT_RUN))) return(0); addr->pcsr0 = 0; DELAY(5000); addr->pcsr0 = PCSR0_RSET; while ((addr->pcsr0 & PCSR0_INTR) == 0) ; /* make board interrupt by executing a GETPCBB command */ addr->pcsr0 = PCSR0_INTE; addr->pcsr2 = 0; addr->pcsr3 = 0; addr->pcsr0 = PCSR0_INTE|CMD_GETPCBB; DELAY(50000); ua->ua_ivec = deintr; ua->ua_reset = dereset; /* Wish to be called after ubareset */ return 1; }