/* $NetBSD: if_il.c,v 1.19 2008/04/05 19:16:49 cegger Exp $ */ /* * Copyright (c) 1982, 1986 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_il.c 7.8 (Berkeley) 12/16/90 */ /* * Interlan Ethernet Communications Controller interface */ #include __KERNEL_RCSID(0, "$NetBSD: if_il.c,v 1.19 2008/04/05 19:16:49 cegger Exp $"); #include "opt_inet.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #endif #include #include #include #include #include #include /* * Ethernet software status per interface. * * Each interface is referenced by a network interface structure, * is_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 il_softc { struct device sc_dev; /* Configuration common part */ struct ethercom sc_ec; /* Ethernet common part */ #define sc_if sc_ec.ec_if /* network-visible interface */ struct evcnt sc_cintrcnt; /* Command interrupts */ struct evcnt sc_rintrcnt; /* Receive interrupts */ bus_space_tag_t sc_iot; bus_addr_t sc_ioh; bus_dma_tag_t sc_dmat; struct ubinfo sc_ui; struct ifuba sc_ifuba; /* UNIBUS resources */ int sc_flags; #define ILF_RCVPENDING 0x2 /* start rcv in ilcint */ #define ILF_STATPENDING 0x4 /* stat cmd pending */ #define ILF_RUNNING 0x8 /* board is running */ #define ILF_SETADDR 0x10 /* physical address is changed */ short sc_lastcmd; /* can't read csr, so must save it */ short sc_scaninterval; /* interval of stat collection */ #define ILWATCHINTERVAL 60 /* once every 60 seconds */ union { struct il_stats isu_stats; /* holds on-board statistics */ struct ether_addr isu_maddrs[63]; /* multicast addrs */ } sc_isu; #define sc_stats sc_isu.isu_stats #define sc_maddrs sc_isu.isu_maddrs struct il_stats sc_sum; /* summation over time */ int sc_ubaddr; /* mapping registers of is_stats */ }; static int ilmatch(struct device *, struct cfdata *, void *); static void ilattach(struct device *, struct device *, void *); static void ilcint(void *); static void ilrint(void *); static void ilreset(struct device *); static int ilwait(struct il_softc *, char *); static int ilinit(struct ifnet *); static void ilstart(struct ifnet *); static void ilwatch(struct ifnet *); static void iltotal(struct il_softc *); static void ilstop(struct ifnet *, int); CFATTACH_DECL(il, sizeof(struct il_softc), ilmatch, ilattach, NULL, NULL); #define IL_WCSR(csr, val) \ bus_space_write_2(sc->sc_iot, sc->sc_ioh, csr, val) #define IL_RCSR(csr) \ bus_space_read_2(sc->sc_iot, sc->sc_ioh, csr) #define LOWORD(x) ((int)(x) & 0xffff) #define HIWORD(x) (((int)(x) >> 16) & 0x3) int ilmatch(struct device *parent, struct cfdata *cf, void *aux) { struct uba_attach_args *ua = aux; volatile int i; bus_space_write_2(ua->ua_iot, ua->ua_ioh, IL_CSR, ILC_OFFLINE|IL_CIE); DELAY(100000); i = bus_space_read_2(ua->ua_iot, ua->ua_ioh, IL_CSR); /* clear CDONE */ return 1; } /* * Interface exists: make available by filling in network interface * record. System will initialize the interface when it is ready * to accept packets. A STATUS command is done to get the ethernet * address and other interesting data. */ void ilattach(struct device *parent, struct device *self, void *aux) { struct uba_attach_args *ua = aux; struct il_softc *sc = device_private(self); struct ifnet *ifp = &sc->sc_if; int error; sc->sc_iot = ua->ua_iot; sc->sc_ioh = ua->ua_ioh; sc->sc_dmat = ua->ua_dmat; /* * Map interrupt vectors and reset function. */ uba_intr_establish(ua->ua_icookie, ua->ua_cvec, ilcint, sc, &sc->sc_cintrcnt); evcnt_attach_dynamic(&sc->sc_cintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, device_xname(&sc->sc_dev), "intr"); uba_intr_establish(ua->ua_icookie, ua->ua_cvec-4, ilrint, sc, &sc->sc_rintrcnt); evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, device_xname(&sc->sc_dev), "intr"); uba_reset_establish(ilreset, &sc->sc_dev); /* * Reset the board and map the statistics * buffer onto the Unibus. */ IL_WCSR(IL_CSR, ILC_RESET); (void)ilwait(sc, "reset"); sc->sc_ui.ui_size = sizeof(struct il_stats); sc->sc_ui.ui_vaddr = (void *)&sc->sc_stats; if ((error = uballoc((struct uba_softc *)parent, &sc->sc_ui, 0))) return printf(": failed uballoc, error = %d\n", error); IL_WCSR(IL_BAR, LOWORD(sc->sc_ui.ui_baddr)); IL_WCSR(IL_BCR, sizeof(struct il_stats)); IL_WCSR(IL_CSR, ((sc->sc_ui.ui_baddr >> 2) & IL_EUA)|ILC_STAT); (void)ilwait(sc, "status"); ubfree((struct uba_softc *)parent, &sc->sc_ui); printf("%s: module=%s firmware=%s\n", device_xname(&sc->sc_dev), sc->sc_stats.ils_module, sc->sc_stats.ils_firmware); printf("%s: hardware address %s\n", device_xname(&sc->sc_dev), ether_sprintf(sc->sc_stats.ils_addr)); strlcpy(ifp->if_xname, device_xname(&sc->sc_dev), IFNAMSIZ); ifp->if_softc = sc; ifp->if_flags = IFF_BROADCAST; ifp->if_init = ilinit; ifp->if_stop = ilstop; ifp->if_ioctl = ether_ioctl; ifp->if_start = ilstart; ifp->if_watchdog = ilwatch; IFQ_SET_READY(&ifp->if_snd); if_attach(ifp); ether_ifattach(ifp, sc->sc_stats.ils_addr); } void ilstop(struct ifnet *ifp, int a) { struct il_softc *sc = ifp->if_softc; IL_WCSR(IL_CSR, ILC_RESET); } int ilwait(struct il_softc *sc, char *op) { while ((IL_RCSR(IL_CSR)&IL_CDONE) == 0) ; if (IL_RCSR(IL_CSR)&IL_STATUS) { char bits[64]; aprint_error_dev(&sc->sc_dev, "%s failed, csr=%s\n", op, bitmask_snprintf(IL_RCSR(IL_CSR), IL_BITS, bits, sizeof(bits))); return (-1); } return (0); } /* * Reset of interface after UNIBUS reset. * If interface is on specified uba, reset its state. */ void ilreset(struct device *dev) { struct il_softc *sc = (void *)dev; printf(" %s", device_xname(&sc->sc_dev)); sc->sc_if.if_flags &= ~IFF_RUNNING; sc->sc_flags &= ~ILF_RUNNING; ilinit(&sc->sc_if); } /* * Initialization of interface; clear recorded pending * operations, and reinitialize UNIBUS usage. */ int ilinit(struct ifnet *ifp) { struct il_softc *sc = ifp->if_softc; int s; if (sc->sc_flags & ILF_RUNNING) return 0; if ((ifp->if_flags & IFF_RUNNING) == 0) { if (if_ubainit(&sc->sc_ifuba, (void *)device_parent(&sc->sc_dev), ETHER_MAX_LEN)) { aprint_error_dev(&sc->sc_dev, "can't initialize\n"); sc->sc_if.if_flags &= ~IFF_UP; return 0; } sc->sc_ui.ui_size = sizeof(sc->sc_isu); sc->sc_ui.ui_vaddr = (void *)&sc->sc_isu; uballoc((void *)device_parent(&sc->sc_dev), &sc->sc_ui, 0); } sc->sc_scaninterval = ILWATCHINTERVAL; ifp->if_timer = sc->sc_scaninterval; /* * Turn off source address insertion (it's faster this way), * and set board online. Former doesn't work if board is * already online (happens on ubareset), so we put it offline * first. */ s = splnet(); IL_WCSR(IL_CSR, ILC_RESET); if (ilwait(sc, "hardware diag")) { sc->sc_if.if_flags &= ~IFF_UP; splx(s); return 0; } IL_WCSR(IL_CSR, ILC_CISA); while ((IL_RCSR(IL_CSR) & IL_CDONE) == 0) ; /* * If we must reprogram this board's physical ethernet * address (as for secondary XNS interfaces), we do so * before putting it on line, and starting receive requests. * If you try this on an older 1010 board, it will total * wedge the board. */ if (sc->sc_flags & ILF_SETADDR) { bcopy(CLLADDR(ifp->if_sadl), &sc->sc_isu, ETHER_ADDR_LEN); IL_WCSR(IL_BAR, LOWORD(sc->sc_ui.ui_baddr)); IL_WCSR(IL_BCR, ETHER_ADDR_LEN); IL_WCSR(IL_CSR, ((sc->sc_ui.ui_baddr >> 2) & IL_EUA)|ILC_LDPA); if (ilwait(sc, "setaddr")) return 0; IL_WCSR(IL_BAR, LOWORD(sc->sc_ui.ui_baddr)); IL_WCSR(IL_BCR, sizeof (struct il_stats)); IL_WCSR(IL_CSR, ((sc->sc_ui.ui_baddr >> 2) & IL_EUA)|ILC_STAT); if (ilwait(sc, "verifying setaddr")) return 0; if (memcmp(sc->sc_stats.ils_addr, CLLADDR(ifp->if_sadl), ETHER_ADDR_LEN) != 0) { aprint_error_dev(&sc->sc_dev, "setaddr didn't work\n"); return 0; } } #ifdef MULTICAST if (is->is_if.if_flags & IFF_PROMISC) { addr->il_csr = ILC_PRMSC; if (ilwait(ui, "all multi")) return 0; } else if (is->is_if.if_flags & IFF_ALLMULTI) { too_many_multis: addr->il_csr = ILC_ALLMC; if (ilwait(ui, "all multi")) return 0; else { int i; register struct ether_addr *ep = is->is_maddrs; struct ether_multi *enm; struct ether_multistep step; /* * Step through our list of multicast addresses. If we have * too many multicast addresses, or if we have to listen to * a range of multicast addresses, turn on reception of all * multicasts. */ i = 0; ETHER_FIRST_MULTI(step, &is->is_ac, enm); while (enm != NULL) { if (++i > 63 && k != 0) { break; } *ep++ = *(struct ether_addr *)enm->enm_addrlo; ETHER_NEXT_MULTI(step, enm); } if (i = 0) { /* no multicasts! */ } else if (i <= 63) { addr->il_bar = is->is_ubaddr & 0xffff; addr->il_bcr = i * sizeof (struct ether_addr); addr->il_csr = ((is->is_ubaddr >> 2) & IL_EUA)| LC_LDGRPS; if (ilwait(ui, "load multi")) return; } else { is->is_if.if_flags |= IFF_ALLMULTI; goto too_many_multis; } } #endif /* MULTICAST */ /* * Set board online. * Hang receive buffer and start any pending * writes by faking a transmit complete. * Receive bcr is not a multiple of 8 so buffer * chaining can't happen. */ IL_WCSR(IL_CSR, ILC_ONLINE); while ((IL_RCSR(IL_CSR) & IL_CDONE) == 0) ; IL_WCSR(IL_BAR, LOWORD(sc->sc_ifuba.ifu_r.ifrw_info)); IL_WCSR(IL_BCR, sizeof(struct il_rheader) + ETHERMTU + 6); IL_WCSR(IL_CSR, ((sc->sc_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE); while ((IL_RCSR(IL_CSR) & IL_CDONE) == 0) ; ifp->if_flags |= IFF_RUNNING | IFF_OACTIVE; sc->sc_flags |= ILF_RUNNING; sc->sc_lastcmd = 0; ilcint(sc); splx(s); return 0; } /* * Start output on interface. * Get another datagram to send off of the interface queue, * and map it to the interface before starting the output. */ void ilstart(struct ifnet *ifp) { struct il_softc *sc = ifp->if_softc; int len; struct mbuf *m; short csr; IFQ_DEQUEUE(&ifp->if_snd, m); if (m == 0) { if ((sc->sc_flags & ILF_STATPENDING) == 0) return; IL_WCSR(IL_BAR, LOWORD(sc->sc_ui.ui_baddr)); IL_WCSR(IL_BCR, sizeof (struct il_stats)); csr = ((sc->sc_ui.ui_baddr >> 2) & IL_EUA)|ILC_STAT|IL_RIE|IL_CIE; sc->sc_flags &= ~ILF_STATPENDING; goto startcmd; } len = if_wubaput(&sc->sc_ifuba, m); #ifdef notdef if (sc->sc_ifuba.ifu_flags & UBA_NEEDBDP) UBAPURGE(is->is_ifuba.ifu_uba, is->is_ifuba.ifu_w.ifrw_bdp); #endif IL_WCSR(IL_BAR, LOWORD(sc->sc_ifuba.ifu_w.ifrw_info)); IL_WCSR(IL_BCR, len); csr = ((sc->sc_ifuba.ifu_w.ifrw_info >> 2) & IL_EUA)|ILC_XMIT|IL_CIE|IL_RIE; startcmd: sc->sc_lastcmd = csr & IL_CMD; IL_WCSR(IL_CSR, csr); ifp->if_flags |= IFF_OACTIVE; return; } /* * Command done interrupt. */ void ilcint(void *arg) { struct il_softc *sc = arg; short csr; if ((sc->sc_if.if_flags & IFF_OACTIVE) == 0) { char bits[64]; aprint_error_dev(&sc->sc_dev, "stray xmit interrupt, csr=%s\n", bitmask_snprintf(IL_RCSR(IL_CSR), IL_BITS, bits, sizeof(bits))); return; } csr = IL_RCSR(IL_CSR); /* * Hang receive buffer if it couldn't * be done earlier (in ilrint). */ if (sc->sc_flags & ILF_RCVPENDING) { int s; IL_WCSR(IL_BAR, LOWORD(sc->sc_ifuba.ifu_r.ifrw_info)); IL_WCSR(IL_BCR, sizeof(struct il_rheader) + ETHERMTU + 6); IL_WCSR(IL_CSR, ((sc->sc_ifuba.ifu_r.ifrw_info>>2) & IL_EUA)|ILC_RCV|IL_RIE); s = splhigh(); while ((IL_RCSR(IL_CSR) & IL_CDONE) == 0) ; splx(s); sc->sc_flags &= ~ILF_RCVPENDING; } sc->sc_if.if_flags &= ~IFF_OACTIVE; csr &= IL_STATUS; switch (sc->sc_lastcmd) { case ILC_XMIT: sc->sc_if.if_opackets++; if (csr > ILERR_RETRIES) sc->sc_if.if_oerrors++; break; case ILC_STAT: if (csr == ILERR_SUCCESS) iltotal(sc); break; } if_wubaend(&sc->sc_ifuba); ilstart(&sc->sc_if); } /* * Ethernet interface receiver interrupt. * 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 ilrint(void *arg) { struct il_softc *sc = arg; struct il_rheader *il; struct mbuf *m; int len, s; sc->sc_if.if_ipackets++; #ifdef notyet if (sc->sc_ifuba.ifu_flags & UBA_NEEDBDP) UBAPURGE(is->is_ifuba.ifu_uba, is->is_ifuba.ifu_r.ifrw_bdp); #endif il = (struct il_rheader *)(sc->sc_ifuba.ifu_r.ifrw_addr); len = il->ilr_length - sizeof(struct il_rheader); if ((il->ilr_status&(ILFSTAT_A|ILFSTAT_C)) || len < 46 || len > ETHERMTU) { sc->sc_if.if_ierrors++; #ifdef notdef if (sc->sc_if.if_ierrors % 100 == 0) printf("il%d: += 100 input errors\n", unit); #endif goto setup; } if (len == 0) goto setup; /* * Pull packet off interface. */ m = if_rubaget(&sc->sc_ifuba, &sc->sc_if, len); if (m == NULL) goto setup; /* Shave off status hdr */ m_adj(m, 4); (*sc->sc_if.if_input)(&sc->sc_if, m); setup: /* * Reset for next packet if possible. * If waiting for transmit command completion, set flag * and wait until command completes. */ if (sc->sc_if.if_flags & IFF_OACTIVE) { sc->sc_flags |= ILF_RCVPENDING; return; } IL_WCSR(IL_BAR, LOWORD(sc->sc_ifuba.ifu_r.ifrw_info)); IL_WCSR(IL_BCR, sizeof(struct il_rheader) + ETHERMTU + 6); IL_WCSR(IL_CSR, ((sc->sc_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE); s = splhigh(); while ((IL_RCSR(IL_CSR) & IL_CDONE) == 0) ; splx(s); } /* * Watchdog routine, request statistics from board. */ void ilwatch(struct ifnet *ifp) { struct il_softc *sc = ifp->if_softc; int s; if (sc->sc_flags & ILF_STATPENDING) { ifp->if_timer = sc->sc_scaninterval; return; } s = splnet(); sc->sc_flags |= ILF_STATPENDING; if ((sc->sc_if.if_flags & IFF_OACTIVE) == 0) ilstart(ifp); splx(s); ifp->if_timer = sc->sc_scaninterval; } /* * Total up the on-board statistics. */ void iltotal(struct il_softc *sc) { struct ifnet *ifp = &sc->sc_if; u_short *interval, *sum, *end; interval = &sc->sc_stats.ils_frames; sum = &sc->sc_sum.ils_frames; end = sc->sc_sum.ils_fill2; while (sum < end) *sum++ += *interval++; sc->sc_if.if_collisions = sc->sc_sum.ils_collis; if ((sc->sc_flags & ILF_SETADDR) && (memcmp(sc->sc_stats.ils_addr, CLLADDR(ifp->if_sadl), ETHER_ADDR_LEN) != 0)) { log(LOG_ERR, "%s: physaddr reverted\n", device_xname(&sc->sc_dev)); sc->sc_flags &= ~ILF_RUNNING; ilinit(&sc->sc_if); } } #ifdef notyet /* * set ethernet address for unit */ void il_setaddr(u_char *physaddr, struct il_softc *sc) { if (! (sc->sc_flags & ILF_RUNNING)) return; bcopy((void *)physaddr, (void *)is->is_addr, sizeof is->is_addr); sc->sc_flags &= ~ILF_RUNNING; sc->sc_flags |= ILF_SETADDR; ilinit(&sc->sc_if); } #endif