/* $OpenBSD: if_ep.c,v 1.9 1996/03/20 01:00:49 mickey Exp $ */ /* $NetBSD: if_ep.c,v 1.86 1995/12/24 02:31:27 mycroft Exp $ */ /* * Copyright (c) 1994 Herb Peyerl * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Herb Peyerl. * 4. The name of Herb Peyerl may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #include "pcmciabus.h" #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif #ifdef NS #include #include #endif #if NBPFILTER > 0 #include #include #endif #include "pci.h" #include #include #include #include #include #include #include #include /* PCI constants */ #define PCI_VENDORID(x) ((x) & 0xFFFF) #define PCI_CHIPID(x) (((x) >> 16) & 0xFFFF) #define PCI_CONN 0x48 /* Connector type */ #define PCI_CBMA 0x10 /* Configuration Base Memory Address */ #define ETHER_MIN_LEN 64 #define ETHER_MAX_LEN 1518 #define ETHER_ADDR_LEN 6 /* * Ethernet software status per interface. */ struct ep_softc { struct device sc_dev; void *sc_ih; struct arpcom sc_arpcom; /* Ethernet common part */ int ep_iobase; /* i/o bus address */ char ep_connectors; /* Connectors on this card. */ #define MAX_MBS 8 /* # of mbufs we keep around */ struct mbuf *mb[MAX_MBS]; /* spare mbuf storage. */ int next_mb; /* Which mbuf to use next. */ int last_mb; /* Last mbuf. */ int tx_start_thresh; /* Current TX_start_thresh. */ int tx_succ_ok; /* # packets sent in sequence */ /* w/o underrun */ u_char bustype; #define EP_BUS_ISA 0x0 #define EP_BUS_PCMCIA 0x1 #define EP_BUS_EISA 0x2 #define EP_BUS_PCI 0x3 #define EP_IS_BUS_32(a) ((a) & 0x2) }; static int epprobe __P((struct device *, void *, void *)); static void epattach __P((struct device *, struct device *, void *)); struct cfdriver epcd = { NULL, "ep", epprobe, epattach, DV_IFNET, sizeof(struct ep_softc) }; int epintr __P((void *)); static void epxstat __P((struct ep_softc *)); static int epstatus __P((struct ep_softc *)); void epinit __P((struct ep_softc *)); int epioctl __P((struct ifnet *, u_long, caddr_t)); void epstart __P((struct ifnet *)); void epwatchdog __P((int)); void epreset __P((struct ep_softc *)); void epread __P((struct ep_softc *)); struct mbuf *epget __P((struct ep_softc *, int)); void epmbuffill __P((struct ep_softc *)); void epmbufempty __P((struct ep_softc *)); void epstop __P((struct ep_softc *)); void epsetfilter __P((struct ep_softc *)); void epsetlink __P((struct ep_softc *)); static void epconfig __P((struct ep_softc *, u_int)); static u_short epreadeeprom __P((int id_port, int offset)); static int epbusyeeprom __P((struct ep_softc *)); #define MAXEPCARDS 20 /* if you have 21 cards in your machine... you lose */ static struct epcard { int iobase; int irq; char available; char bustype; } epcards[MAXEPCARDS]; static int nepcards; static void epaddcard(iobase, irq, bustype) int iobase; int irq; char bustype; { if (nepcards >= MAXEPCARDS) return; epcards[nepcards].iobase = iobase; epcards[nepcards].irq = (irq == 2) ? 9 : irq; epcards[nepcards].available = 1; epcards[nepcards].bustype = bustype; nepcards++; } #if NPCMCIABUS > 0 #include static int ep_probe_pcmcia __P((struct device *, void *, void *, struct pcmcia_link *)); static int epmod __P((struct pcmcia_link *, struct device *, struct pcmcia_conf *, struct cfdata * cf)); static int ep_remove __P((struct pcmcia_link *, struct device *)); /* additional setup needed for pcmcia devices */ static int ep_probe_pcmcia(parent, match, aux, pc_link) struct device *parent; void *match; void *aux; struct pcmcia_link *pc_link; { struct ep_softc *sc = (void *) match; struct cfdata *cf = sc->sc_dev.dv_cfdata; struct isa_attach_args *ia = aux; struct pcmciadevs *dev = pc_link->device; struct ifnet *ifp = &sc->sc_arpcom.ac_if; int i; extern int ifqmaxlen; short addr[3]; outw(ia->ia_iobase + EP_COMMAND, WINDOW_SELECT | 0); outw(ia->ia_iobase + EP_W0_CONFIG_CTRL, ENABLE_DRQ_IRQ); outw(ia->ia_iobase + EP_W0_RESOURCE_CFG, 0x3f00); /* * ok til here. Now try to figure out which link we have. * try coax first... */ sc->bustype = EP_BUS_PCMCIA; #ifdef EP_COAX_DEFAULT outw(ia->ia_iobase + EP_W0_ADDRESS_CFG, 0xC000); #else /* COAX as default is reportet to be a problem */ outw(ia->ia_iobase + EP_W0_ADDRESS_CFG, 0x0000); #endif ifp->if_snd.ifq_maxlen = ifqmaxlen; epaddcard(ia->ia_iobase, ia->ia_irq, 0); for (i = 0; i < nepcards; i++) { if (epcards[i].available == 0) continue; if (ia->ia_iobase != IOBASEUNK && ia->ia_iobase != epcards[i].iobase) continue; if (ia->ia_irq != IRQUNK && ia->ia_irq != epcards[i].irq) continue; goto good; } return 0; good: epcards[i].available = 0; ia->ia_iobase = epcards[i].iobase; ia->ia_irq = epcards[i].irq; ia->ia_iosize = 0x10; ia->ia_msize = 0; return 1; } /* modify config entry */ static int epmod(pc_link, self, pc_cf, cf) struct pcmcia_link *pc_link; struct device *self; struct pcmcia_conf *pc_cf; struct cfdata *cf; { int err; struct pcmciadevs *dev = pc_link->device; struct ep_softc *sc = (void *) self; if ((err = pc_link->adapter->bus_link->bus_config(pc_link, self, pc_cf, cf)) != 0) { printf("bus_config failed %d\n", err); return err; } if (pc_cf->io[0].len > 0x10) pc_cf->io[0].len = 0x10; #if 0 pc_cf->cfgtype = DOSRESET; #endif pc_cf->cfgtype = 1; return 0; } static int ep_remove(pc_link, self) struct pcmcia_link *pc_link; struct device *self; { struct ep_softc *sc = (void *) self; struct ifnet *ifp = &sc->sc_arpcom.ac_if; if_down(ifp); epstop(sc); ifp->if_flags &= ~(IFF_RUNNING | IFF_UP); return pc_link->adapter->bus_link->bus_unconfig(pc_link); } static struct pcmcia_3com { struct pcmcia_device pcd; } pcmcia_3com = { "PCMCIA 3COM 3C589", epmod, ep_probe_pcmcia, NULL, ep_remove }; struct pcmciadevs pcmcia_ep_devs[] = { { "ep", 0, "3Com Corporation", "3C589", #if 0 "TP/BNC LAN Card Ver. 1a", "000001", #else NULL, NULL, #endif (void *) -1, (void *) &pcmcia_3com }, #if 0 { "ep", 0, "3Com Corporation", "3C589", "TP/BNC LAN Card Ver. 2a", "000002", (void *) -1, (void *) &pcmcia_3com }, #endif { NULL } }; #endif /* * 3c579 cards on the EISA bus are probed by their slot number. 3c509 * cards on the ISA bus are probed in ethernet address order. The probe * sequence requires careful orchestration, and we'd like like to allow * the irq and base address to be wildcarded. So, we probe all the cards * the first time epprobe() is called. On subsequent calls we look for * matching cards. */ int epprobe(parent, match, aux) struct device *parent; void *match, *aux; { struct ep_softc *sc = match; struct isa_attach_args *ia = aux; static int probed; int slot, iobase, i; u_short vendor, model; int k, k2; #if NPCI > 0 extern struct cfdriver pcicd; if (parent->dv_cfdata->cf_driver == &pcicd) { struct pci_attach_args *pa = (struct pci_attach_args *) aux; if (PCI_VENDORID(pa->pa_id) != PCI_VENDOR_3COM || (PCI_CHIPID(pa->pa_id) != PCI_PRODUCT_3COM_3C590 && PCI_CHIPID(pa->pa_id) != PCI_PRODUCT_3COM_3C595)) return 0; if (nepcards >= MAXEPCARDS) return 0; epcards[nepcards++].available = 0; return 1; } #endif if (!probed) { probed = 1; /* find all EISA cards */ for (slot = 1; slot < 16; slot++) { iobase = 0x1000 * slot; vendor = htons(inw(iobase + EISA_VENDOR)); if (vendor != MFG_ID) continue; model = htons(inw(iobase + EISA_MODEL)); if ((model & 0xfff0) != PROD_ID) { #ifndef trusted printf("epprobe: ignoring model %04x\n", model); #endif continue; } outb(iobase + EISA_CONTROL, EISA_ENABLE | EISA_RESET); delay(10); outb(iobase + EISA_CONTROL, EISA_ENABLE); /* Wait for reset? */ delay(1000); k = inw(iobase + EP_W0_ADDRESS_CFG); k = (k & 0x1f) * 0x10 + 0x200; k2 = inw(iobase + EP_W0_RESOURCE_CFG); k2 >>= 12; epaddcard(iobase, k2, EP_BUS_EISA); } for (slot = 0; slot < 10; slot++) { elink_reset(); elink_idseq(ELINK_509_POLY); /* Untag all the adapters so they will talk to us. */ if (slot == 0) outb(ELINK_ID_PORT, TAG_ADAPTER + 0); vendor = htons(epreadeeprom(ELINK_ID_PORT, EEPROM_MFG_ID)); if (vendor != MFG_ID) continue; model = htons(epreadeeprom(ELINK_ID_PORT, EEPROM_PROD_ID)); if ((model & 0xfff0) != PROD_ID) { #ifndef trusted printf("epprobe: ignoring model %04x\n", model); #endif continue; } k = epreadeeprom(ELINK_ID_PORT, EEPROM_ADDR_CFG); k = (k & 0x1f) * 0x10 + 0x200; k2 = epreadeeprom(ELINK_ID_PORT, EEPROM_RESOURCE_CFG); k2 >>= 12; epaddcard(k, k2, EP_BUS_ISA); /* so card will not respond to contention again */ outb(ELINK_ID_PORT, TAG_ADAPTER + 1); /* * XXX: this should probably not be done here * because it enables the drq/irq lines from * the board. Perhaps it should be done after * we have checked for irq/drq collisions? */ outb(ELINK_ID_PORT, ACTIVATE_ADAPTER_TO_CONFIG); } /* XXX should we sort by ethernet address? */ } for (i = 0; i < nepcards; i++) { if (epcards[i].available == 0) continue; if (ia->ia_iobase != IOBASEUNK && ia->ia_iobase != epcards[i].iobase) continue; if (ia->ia_irq != IRQUNK && ia->ia_irq != epcards[i].irq) continue; goto good; } return 0; good: epcards[i].available = 0; sc->bustype = epcards[i].bustype; ia->ia_iobase = epcards[i].iobase; ia->ia_irq = epcards[i].irq; ia->ia_iosize = 0x10; ia->ia_msize = 0; return 1; } static void epconfig(sc, conn) struct ep_softc *sc; u_int conn; { u_short i; struct ifnet *ifp = &sc->sc_arpcom.ac_if; sc->ep_connectors = 0; printf(": "); if (conn & IS_AUI) { printf("aui"); sc->ep_connectors |= AUI; } if (conn & IS_BNC) { if (sc->ep_connectors) printf("/"); printf("bnc"); sc->ep_connectors |= BNC; } if (conn & IS_UTP) { if (sc->ep_connectors) printf("/"); printf("utp"); sc->ep_connectors |= UTP; } if (!sc->ep_connectors) printf("no connectors!"); /* * Read the station address from the eeprom */ for (i = 0; i < 3; i++) { u_short x; if (epbusyeeprom(sc)) return; outw(BASE + EP_W0_EEPROM_COMMAND, READ_EEPROM | i); if (epbusyeeprom(sc)) return; x = inw(BASE + EP_W0_EEPROM_DATA); sc->sc_arpcom.ac_enaddr[(i << 1)] = x >> 8; sc->sc_arpcom.ac_enaddr[(i << 1) + 1] = x; } printf(" address %s\n", ether_sprintf(sc->sc_arpcom.ac_enaddr)); ifp->if_unit = sc->sc_dev.dv_unit; ifp->if_name = epcd.cd_name; ifp->if_start = epstart; ifp->if_ioctl = epioctl; ifp->if_watchdog = epwatchdog; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; if_attach(ifp); ether_ifattach(ifp); #if NBPFILTER > 0 bpfattach(&sc->sc_arpcom.ac_if.if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif sc->tx_start_thresh = 20; /* probably a good starting point. */ } static void epattach(parent, self, aux) struct device *parent, *self; void *aux; { struct ep_softc *sc = (void *)self; u_short conn = 0; #if NPCI > 0 extern struct cfdriver pcicd; if (parent->dv_cfdata->cf_driver == &pcicd) { struct pci_attach_args *pa = aux; int iobase; u_short i; if (pci_map_io(pa->pa_tag, PCI_CBMA, &iobase)) { printf("%s: couldn't map io\n", sc->sc_dev.dv_xname); return; } sc->bustype = EP_BUS_PCI; sc->ep_iobase = iobase; /* & 0xfffffff0 */ i = pci_conf_read(pa->pa_tag, PCI_CONN); /* * Bits 13,12,9 of the isa adapter are the same as bits * 5,4,3 of the pci adapter */ if (i & IS_PCI_AUI) conn |= IS_AUI; if (i & IS_PCI_BNC) conn |= IS_BNC; if (i & IS_PCI_UTP) conn |= IS_UTP; GO_WINDOW(0); } else #endif { struct isa_attach_args *ia = aux; sc->ep_iobase = ia->ia_iobase; GO_WINDOW(0); conn = inw(ia->ia_iobase + EP_W0_CONFIG_CTRL); } epconfig(sc, conn); #if NPCI > 0 if (parent->dv_cfdata->cf_driver == &pcicd) { struct pci_attach_args *pa = aux; pci_conf_write(pa->pa_tag, PCI_COMMAND_STATUS_REG, pci_conf_read(pa->pa_tag, PCI_COMMAND_STATUS_REG) | PCI_COMMAND_MASTER_ENABLE); sc->sc_ih = pci_map_int(pa->pa_tag, IPL_NET, epintr, sc, sc->sc_dev.dv_xname); if (sc->sc_ih == NULL) { printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname); return; } epstop(sc); } else #endif { struct isa_attach_args *ia = aux; sc->sc_ih = isa_intr_establish(ia->ia_irq, IST_EDGE, IPL_NET, epintr, sc, sc->sc_dev.dv_xname); } } /* * The order in here seems important. Otherwise we may not receive * interrupts. ?! */ void epinit(sc) register struct ep_softc *sc; { register struct ifnet *ifp = &sc->sc_arpcom.ac_if; int i; while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS) ; if (sc->bustype != EP_BUS_PCI) { GO_WINDOW(0); outw(BASE + EP_W0_CONFIG_CTRL, 0); outw(BASE + EP_W0_CONFIG_CTRL, ENABLE_DRQ_IRQ); } if (sc->bustype == EP_BUS_PCMCIA) { #ifdef EP_COAX_DEFAULT outw(BASE + EP_W0_ADDRESS_CFG,3<<14); #else outw(BASE + EP_W0_ADDRESS_CFG,0<<14); #endif outw(BASE + EP_W0_RESOURCE_CFG, 0x3f00); } GO_WINDOW(2); for (i = 0; i < 6; i++) /* Reload the ether_addr. */ outb(BASE + EP_W2_ADDR_0 + i, sc->sc_arpcom.ac_enaddr[i]); outw(BASE + EP_COMMAND, RX_RESET); outw(BASE + EP_COMMAND, TX_RESET); GO_WINDOW(1); /* Window 1 is operating window */ for (i = 0; i < 31; i++) inb(BASE + EP_W1_TX_STATUS); outw(BASE + EP_COMMAND, SET_RD_0_MASK | S_CARD_FAILURE | S_RX_COMPLETE | S_TX_COMPLETE | S_TX_AVAIL); outw(BASE + EP_COMMAND, SET_INTR_MASK | S_CARD_FAILURE | S_RX_COMPLETE | S_TX_COMPLETE | S_TX_AVAIL); /* * Attempt to get rid of any stray interrupts that occured during * configuration. On the i386 this isn't possible because one may * already be queued. However, a single stray interrupt is * unimportant. */ outw(BASE + EP_COMMAND, ACK_INTR | 0xff); epsetfilter(sc); epsetlink(sc); outw(BASE + EP_COMMAND, RX_ENABLE); outw(BASE + EP_COMMAND, TX_ENABLE); epmbuffill(sc); /* Interface is now `running', with no output active. */ ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; /* Attempt to start output, if any. */ epstart(ifp); } void epsetfilter(sc) register struct ep_softc *sc; { register struct ifnet *ifp = &sc->sc_arpcom.ac_if; GO_WINDOW(1); /* Window 1 is operating window */ outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL | FIL_BRDCST | ((ifp->if_flags & IFF_MULTICAST) ? FIL_MULTICAST : 0 ) | ((ifp->if_flags & IFF_PROMISC) ? FIL_PROMISC : 0 )); } void epsetlink(sc) register struct ep_softc *sc; { register struct ifnet *ifp = &sc->sc_arpcom.ac_if; /* * you can `ifconfig (link0|-link0) ep0' to get the following * behaviour: * -link0 disable AUI/UTP. enable BNC. * link0 disable BNC. enable AUI. * link1 if the card has a UTP connector, and link0 is * set too, then you get the UTP port. */ GO_WINDOW(4); outw(BASE + EP_W4_MEDIA_TYPE, DISABLE_UTP); if (!(ifp->if_flags & IFF_LINK0) && (sc->ep_connectors & BNC)) { if (sc->bustype == EP_BUS_PCMCIA) { GO_WINDOW(0); outw(BASE + EP_W0_ADDRESS_CFG,3<<14); GO_WINDOW(1); } outw(BASE + EP_COMMAND, START_TRANSCEIVER); delay(1000); } if (ifp->if_flags & IFF_LINK0) { outw(BASE + EP_COMMAND, STOP_TRANSCEIVER); delay(1000); if ((ifp->if_flags & IFF_LINK1) && (sc->ep_connectors & UTP)) { if (sc->bustype == EP_BUS_PCMCIA) { GO_WINDOW(0); outw(BASE + EP_W0_ADDRESS_CFG,0<<14); GO_WINDOW(4); } outw(BASE + EP_W4_MEDIA_TYPE, ENABLE_UTP); } } GO_WINDOW(1); } /* * Start outputting on the interface. * Always called as splnet(). */ void epstart(ifp) struct ifnet *ifp; { register struct ep_softc *sc = epcd.cd_devs[ifp->if_unit]; struct mbuf *m, *m0; int sh, len, pad; /* Don't transmit if interface is busy or not running */ if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) return; startagain: /* Sneak a peek at the next packet */ m0 = ifp->if_snd.ifq_head; if (m0 == 0) return; /* We need to use m->m_pkthdr.len, so require the header */ if ((m0->m_flags & M_PKTHDR) == 0) panic("epstart: no header mbuf"); len = m0->m_pkthdr.len; pad = (4 - len) & 3; /* * The 3c509 automatically pads short packets to minimum ethernet * length, but we drop packets that are too large. Perhaps we should * truncate them instead? */ if (len + pad > ETHER_MAX_LEN) { /* packet is obviously too large: toss it */ ++ifp->if_oerrors; IF_DEQUEUE(&ifp->if_snd, m0); m_freem(m0); goto readcheck; } if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) { outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4)); /* not enough room in FIFO */ ifp->if_flags |= IFF_OACTIVE; return; } else { outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | 2044); } IF_DEQUEUE(&ifp->if_snd, m0); if (m0 == 0) /* not really needed */ return; outw(BASE + EP_COMMAND, SET_TX_START_THRESH | (len / 4 + sc->tx_start_thresh)); #if NBPFILTER > 0 if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m0); #endif /* * Do the output at splhigh() so that an interrupt from another device * won't cause a FIFO underrun. */ sh = splhigh(); outw(BASE + EP_W1_TX_PIO_WR_1, len); outw(BASE + EP_W1_TX_PIO_WR_1, 0xffff); /* Second dword meaningless */ if (EP_IS_BUS_32(sc->bustype)) { for (m = m0; m; ) { if (m->m_len > 3) outsl(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 4); if (m->m_len & 3) outsb(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t) + (m->m_len & ~3), m->m_len & 3); MFREE(m, m0); m = m0; } } else { for (m = m0; m; ) { if (m->m_len > 1) outsw(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 2); if (m->m_len & 1) outb(BASE + EP_W1_TX_PIO_WR_1, *(mtod(m, caddr_t) + m->m_len - 1)); MFREE(m, m0); m = m0; } } while (pad--) outb(BASE + EP_W1_TX_PIO_WR_1, 0); splx(sh); ++ifp->if_opackets; readcheck: if ((inw(BASE + EP_W1_RX_STATUS) & ERR_INCOMPLETE) == 0) { /* We received a complete packet. */ u_short status = inw(BASE + EP_STATUS); if ((status & S_INTR_LATCH) == 0) { /* * No interrupt, read the packet and continue * Is this supposed to happen? Is my motherboard * completely busted? */ epread(sc); } else /* Got an interrupt, return so that it gets serviced. */ return; } else { /* Check if we are stuck and reset [see XXX comment] */ if (epstatus(sc)) { if (ifp->if_flags & IFF_DEBUG) printf("%s: adapter reset\n", sc->sc_dev.dv_xname); epreset(sc); } } goto startagain; } /* * XXX: The 3c509 card can get in a mode where both the fifo status bit * FIFOS_RX_OVERRUN and the status bit ERR_INCOMPLETE are set * We detect this situation and we reset the adapter. * It happens at times when there is a lot of broadcast traffic * on the cable (once in a blue moon). */ static int epstatus(sc) register struct ep_softc *sc; { u_short fifost; /* * Check the FIFO status and act accordingly */ GO_WINDOW(4); fifost = inw(BASE + EP_W4_FIFO_DIAG); GO_WINDOW(1); if (fifost & FIFOS_RX_UNDERRUN) { if (sc->sc_arpcom.ac_if.if_flags & IFF_DEBUG) printf("%s: RX underrun\n", sc->sc_dev.dv_xname); epreset(sc); return 0; } if (fifost & FIFOS_RX_STATUS_OVERRUN) { if (sc->sc_arpcom.ac_if.if_flags & IFF_DEBUG) printf("%s: RX Status overrun\n", sc->sc_dev.dv_xname); return 1; } if (fifost & FIFOS_RX_OVERRUN) { if (sc->sc_arpcom.ac_if.if_flags & IFF_DEBUG) printf("%s: RX overrun\n", sc->sc_dev.dv_xname); return 1; } if (fifost & FIFOS_TX_OVERRUN) { if (sc->sc_arpcom.ac_if.if_flags & IFF_DEBUG) printf("%s: TX overrun\n", sc->sc_dev.dv_xname); epreset(sc); return 0; } return 0; } static void eptxstat(sc) register struct ep_softc *sc; { int i; /* * We need to read+write TX_STATUS until we get a 0 status * in order to turn off the interrupt flag. */ while ((i = inb(BASE + EP_W1_TX_STATUS)) & TXS_COMPLETE) { outb(BASE + EP_W1_TX_STATUS, 0x0); if (i & TXS_JABBER) { ++sc->sc_arpcom.ac_if.if_oerrors; if (sc->sc_arpcom.ac_if.if_flags & IFF_DEBUG) printf("%s: jabber (%x)\n", sc->sc_dev.dv_xname, i); epreset(sc); } else if (i & TXS_UNDERRUN) { ++sc->sc_arpcom.ac_if.if_oerrors; if (sc->sc_arpcom.ac_if.if_flags & IFF_DEBUG) printf("%s: fifo underrun (%x) @%d\n", sc->sc_dev.dv_xname, i, sc->tx_start_thresh); if (sc->tx_succ_ok < 100) sc->tx_start_thresh = min(ETHER_MAX_LEN, sc->tx_start_thresh + 20); sc->tx_succ_ok = 0; epreset(sc); } else if (i & TXS_MAX_COLLISION) { ++sc->sc_arpcom.ac_if.if_collisions; outw(BASE + EP_COMMAND, TX_ENABLE); sc->sc_arpcom.ac_if.if_flags &= ~IFF_OACTIVE; } else sc->tx_succ_ok = (sc->tx_succ_ok+1) & 127; } } int epintr(arg) void *arg; { register struct ep_softc *sc = arg; struct ifnet *ifp = &sc->sc_arpcom.ac_if; u_short status; int ret = 0; for (;;) { outw(BASE + EP_COMMAND, C_INTR_LATCH); status = inw(BASE + EP_STATUS); if ((status & (S_TX_COMPLETE | S_TX_AVAIL | S_RX_COMPLETE | S_CARD_FAILURE)) == 0) break; ret = 1; /* * Acknowledge any interrupts. It's important that we do this * first, since there would otherwise be a race condition. * Due to the i386 interrupt queueing, we may get spurious * interrupts occasionally. */ outw(BASE + EP_COMMAND, ACK_INTR | status); if (status & S_RX_COMPLETE) epread(sc); if (status & S_TX_AVAIL) { sc->sc_arpcom.ac_if.if_flags &= ~IFF_OACTIVE; epstart(&sc->sc_arpcom.ac_if); } if (status & S_CARD_FAILURE) { printf("%s: adapter failure (%x)\n", sc->sc_dev.dv_xname, status); epreset(sc); return (1); } if (status & S_TX_COMPLETE) { eptxstat(sc); epstart(ifp); } } /* no more interrupts */ return (ret); } void epread(sc) register struct ep_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; struct mbuf *m; struct ether_header *eh; int len; len = inw(BASE + EP_W1_RX_STATUS); again: if (ifp->if_flags & IFF_DEBUG) { int err = len & ERR_MASK; char *s = NULL; if (len & ERR_INCOMPLETE) s = "incomplete packet"; else if (err == ERR_OVERRUN) s = "packet overrun"; else if (err == ERR_RUNT) s = "runt packet"; else if (err == ERR_ALIGNMENT) s = "bad alignment"; else if (err == ERR_CRC) s = "bad crc"; else if (err == ERR_OVERSIZE) s = "oversized packet"; else if (err == ERR_DRIBBLE) s = "dribble bits"; if (s) printf("%s: %s\n", sc->sc_dev.dv_xname, s); } if (len & ERR_INCOMPLETE) return; if (len & ERR_RX) { ++ifp->if_ierrors; goto abort; } len &= RX_BYTES_MASK; /* Lower 11 bits = RX bytes. */ /* Pull packet off interface. */ m = epget(sc, len); if (m == 0) { ifp->if_ierrors++; goto abort; } ++ifp->if_ipackets; /* We assume the header fit entirely in one mbuf. */ eh = mtod(m, struct ether_header *); #if NBPFILTER > 0 /* * Check if there's a BPF listener on this interface. * If so, hand off the raw packet to BPF. */ if (ifp->if_bpf) { bpf_mtap(ifp->if_bpf, m); /* * Note that the interface cannot be in promiscuous mode if * there are no BPF listeners. And if we are in promiscuous * mode, we have to check if this packet is really ours. */ if ((ifp->if_flags & IFF_PROMISC) && (eh->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */ bcmp(eh->ether_dhost, sc->sc_arpcom.ac_enaddr, sizeof(eh->ether_dhost)) != 0) { m_freem(m); return; } } #endif /* We assume the header fit entirely in one mbuf. */ m_adj(m, sizeof(struct ether_header)); ether_input(ifp, eh, m); /* * In periods of high traffic we can actually receive enough * packets so that the fifo overrun bit will be set at this point, * even though we just read a packet. In this case we * are not going to receive any more interrupts. We check for * this condition and read again until the fifo is not full. * We could simplify this test by not using epstatus(), but * rechecking the RX_STATUS register directly. This test could * result in unnecessary looping in cases where there is a new * packet but the fifo is not full, but it will not fix the * stuck behavior. * * Even with this improvement, we still get packet overrun errors * which are hurting performance. Maybe when I get some more time * I'll modify epread() so that it can handle RX_EARLY interrupts. */ if (epstatus(sc)) { len = inw(BASE + EP_W1_RX_STATUS); /* Check if we are stuck and reset [see XXX comment] */ if (len & ERR_INCOMPLETE) { if (ifp->if_flags & IFF_DEBUG) printf("%s: adapter reset\n", sc->sc_dev.dv_xname); epreset(sc); return; } goto again; } return; abort: outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK); while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS) ; } struct mbuf * epget(sc, totlen) struct ep_softc *sc; int totlen; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; struct mbuf *top, **mp, *m; int len; int sh; m = sc->mb[sc->next_mb]; sc->mb[sc->next_mb] = 0; if (m == 0) { MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == 0) return 0; } else { /* If the queue is no longer full, refill. */ if (sc->last_mb == sc->next_mb) timeout(epmbuffill, sc, 1); /* Convert one of our saved mbuf's. */ sc->next_mb = (sc->next_mb + 1) % MAX_MBS; m->m_data = m->m_pktdat; m->m_flags = M_PKTHDR; } m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = totlen; len = MHLEN; top = 0; mp = ⊤ /* * We read the packet at splhigh() so that an interrupt from another * device doesn't cause the card's buffer to overflow while we're * reading it. We may still lose packets at other times. */ sh = splhigh(); while (totlen > 0) { if (top) { m = sc->mb[sc->next_mb]; sc->mb[sc->next_mb] = 0; if (m == 0) { MGET(m, M_DONTWAIT, MT_DATA); if (m == 0) { splx(sh); m_freem(top); return 0; } } else { sc->next_mb = (sc->next_mb + 1) % MAX_MBS; } len = MLEN; } if (totlen >= MINCLSIZE) { MCLGET(m, M_DONTWAIT); if (m->m_flags & M_EXT) len = MCLBYTES; } len = min(totlen, len); if (EP_IS_BUS_32(sc->bustype)) { if (len > 3) { len &= ~3; insl(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t), len / 4); } else insb(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t), len); } else { if (len > 1) { len &= ~1; insw(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t), len / 2); } else *(mtod(m, caddr_t)) = inb(BASE + EP_W1_RX_PIO_RD_1); } m->m_len = len; totlen -= len; *mp = m; mp = &m->m_next; } outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK); while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS) ; splx(sh); return top; } int epioctl(ifp, cmd, data) register struct ifnet *ifp; u_long cmd; caddr_t data; { struct ep_softc *sc = epcd.cd_devs[ifp->if_unit]; struct ifaddr *ifa = (struct ifaddr *)data; struct ifreq *ifr = (struct ifreq *)data; int s, error = 0; s = splnet(); switch (cmd) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: epinit(sc); arp_ifinit(&sc->sc_arpcom, ifa); break; #endif #ifdef NS case AF_NS: { register struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; if (ns_nullhost(*ina)) ina->x_host = *(union ns_host *)(sc->sc_arpcom.ac_enaddr); else bcopy(ina->x_host.c_host, sc->sc_arpcom.ac_enaddr, sizeof(sc->sc_arpcom.ac_enaddr)); /* Set new address. */ epinit(sc); break; } #endif default: epinit(sc); break; } break; case SIOCSIFFLAGS: if ((ifp->if_flags & IFF_UP) == 0 && (ifp->if_flags & IFF_RUNNING) != 0) { /* * If interface is marked down and it is running, then * stop it. */ epstop(sc); ifp->if_flags &= ~IFF_RUNNING; } else if ((ifp->if_flags & IFF_UP) != 0 && (ifp->if_flags & IFF_RUNNING) == 0) { /* * If interface is marked up and it is stopped, then * start it. */ epinit(sc); } else { /* * deal with flags changes: * IFF_MULTICAST, IFF_PROMISC, * IFF_LINK0, IFF_LINK1, */ epsetfilter(sc); epsetlink(sc); } break; case SIOCADDMULTI: case SIOCDELMULTI: error = (cmd == SIOCADDMULTI) ? ether_addmulti(ifr, &sc->sc_arpcom) : ether_delmulti(ifr, &sc->sc_arpcom); if (error == ENETRESET) { /* * Multicast list has changed; set the hardware filter * accordingly. */ epreset(sc); error = 0; } break; default: error = EINVAL; break; } splx(s); return (error); } void epreset(sc) struct ep_softc *sc; { int s; s = splnet(); epstop(sc); epinit(sc); splx(s); } void epwatchdog(unit) int unit; { struct ep_softc *sc = epcd.cd_devs[unit]; log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); ++sc->sc_arpcom.ac_if.if_oerrors; epreset(sc); } void epstop(sc) register struct ep_softc *sc; { outw(BASE + EP_COMMAND, RX_DISABLE); outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK); while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS) ; outw(BASE + EP_COMMAND, TX_DISABLE); outw(BASE + EP_COMMAND, STOP_TRANSCEIVER); outw(BASE + EP_COMMAND, RX_RESET); outw(BASE + EP_COMMAND, TX_RESET); outw(BASE + EP_COMMAND, C_INTR_LATCH); outw(BASE + EP_COMMAND, SET_RD_0_MASK); outw(BASE + EP_COMMAND, SET_INTR_MASK); outw(BASE + EP_COMMAND, SET_RX_FILTER); epmbufempty(sc); } /* * We get eeprom data from the id_port given an offset into the * eeprom. Basically; after the ID_sequence is sent to all of * the cards; they enter the ID_CMD state where they will accept * command requests. 0x80-0xbf loads the eeprom data. We then * read the port 16 times and with every read; the cards check * for contention (ie: if one card writes a 0 bit and another * writes a 1 bit then the host sees a 0. At the end of the cycle; * each card compares the data on the bus; if there is a difference * then that card goes into ID_WAIT state again). In the meantime; * one bit of data is returned in the AX register which is conveniently * returned to us by inb(). Hence; we read 16 times getting one * bit of data with each read. */ static u_short epreadeeprom(id_port, offset) int id_port; int offset; { int i, data = 0; outb(id_port, 0x80 + offset); delay(1000); for (i = 0; i < 16; i++) data = (data << 1) | (inw(id_port) & 1); return (data); } static int epbusyeeprom(sc) struct ep_softc *sc; { int i = 100, j; if (sc->bustype == EP_BUS_PCMCIA) { delay(1000); return 0; } while (i--) { j = inw(BASE + EP_W0_EEPROM_COMMAND); if (j & EEPROM_BUSY) delay(100); else break; } if (!i) { printf("\n%s: eeprom failed to come ready\n", sc->sc_dev.dv_xname); return (1); } if (j & EEPROM_TST_MODE) { printf("\n%s: erase pencil mark, or disable plug-n-play mode!\n", sc->sc_dev.dv_xname); return (1); } return (0); } void epmbuffill(sc) struct ep_softc *sc; { int s, i; s = splnet(); i = sc->last_mb; do { if (sc->mb[i] == NULL) MGET(sc->mb[i], M_DONTWAIT, MT_DATA); if (sc->mb[i] == NULL) break; i = (i + 1) % MAX_MBS; } while (i != sc->next_mb); sc->last_mb = i; /* If the queue was not filled, try again. */ if (sc->last_mb != sc->next_mb) timeout(epmbuffill, sc, 1); splx(s); } void epmbufempty(sc) struct ep_softc *sc; { int s, i; s = splnet(); for (i = 0; imb[i]) { m_freem(sc->mb[i]); sc->mb[i] = NULL; } } sc->last_mb = sc->next_mb = 0; untimeout(epmbuffill, sc); splx(s); }