/* * Copyright (c) 1995 - 2001 John Hay. 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 author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY John Hay ``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 John Hay 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. * * $FreeBSD$ */ /* * Programming assumptions and other issues. * * The descriptors of a DMA channel will fit in a 16K memory window. * * The buffers of a transmit DMA channel will fit in a 16K memory window. * * Only the ISA bus cards with X.21 and V.35 is tested. * * When interface is going up, handshaking is set and it is only cleared * when the interface is down'ed. * * There should be a way to set/reset Raw HDLC/PPP, Loopback, DCE/DTE, * internal/external clock, etc..... * */ #include "opt_netgraph.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef NETGRAPH #include #include #include #include #else /* NETGRAPH */ #include #include #endif /* NETGRAPH */ #include #include #include #ifdef TRACE #define TRC(x) x #else #define TRC(x) #endif #define TRCL(x) x #define PPP_HEADER_LEN 4 struct ar_softc { #ifndef NETGRAPH struct sppp ifsppp; #endif /* NETGRAPH */ int unit; /* With regards to all ar devices */ int subunit; /* With regards to this card */ struct ar_hardc *hc; struct buf_block { u_int txdesc; /* On card address */ u_int txstart; /* On card address */ u_int txend; /* On card address */ u_int txtail; /* Index of first unused buffer */ u_int txmax; /* number of usable buffers/descriptors */ u_int txeda; /* Error descriptor addresses */ }block[AR_TX_BLOCKS]; char xmit_busy; /* Transmitter is busy */ char txb_inuse; /* Number of tx blocks currently in use */ u_char txb_new; /* Index to where new buffer will be added */ u_char txb_next_tx; /* Index to next block ready to tx */ u_int rxdesc; /* On card address */ u_int rxstart; /* On card address */ u_int rxend; /* On card address */ u_int rxhind; /* Index to the head of the rx buffers. */ u_int rxmax; /* number of usable buffers/descriptors */ int scano; int scachan; sca_regs *sca; #ifdef NETGRAPH int running; /* something is attached so we are running */ int dcd; /* do we have dcd? */ /* ---netgraph bits --- */ char nodename[NG_NODELEN + 1]; /* store our node name */ int datahooks; /* number of data hooks attached */ node_p node; /* netgraph node */ hook_p hook; /* data hook */ hook_p debug_hook; struct ifqueue xmitq_hipri; /* hi-priority transmit queue */ struct ifqueue xmitq; /* transmit queue */ int flags; /* state */ #define SCF_RUNNING 0x01 /* board is active */ #define SCF_OACTIVE 0x02 /* output is active */ int out_dog; /* watchdog cycles output count-down */ struct callout_handle handle; /* timeout(9) handle */ u_long inbytes, outbytes; /* stats */ u_long lastinbytes, lastoutbytes; /* a second ago */ u_long inrate, outrate; /* highest rate seen */ u_long inlast; /* last input N secs ago */ u_long out_deficit; /* output since last input */ u_long oerrors, ierrors[6]; u_long opackets, ipackets; #endif /* NETGRAPH */ }; static int next_ar_unit = 0; #ifdef NETGRAPH #define DOG_HOLDOFF 6 /* dog holds off for 6 secs */ #define QUITE_A_WHILE 300 /* 5 MINUTES */ #define LOTS_OF_PACKETS 100 #endif /* NETGRAPH */ /* * This translate from irq numbers to * the value that the arnet card needs * in the lower part of the AR_INT_SEL * register. */ static int irqtable[16] = { 0, /* 0 */ 0, /* 1 */ 0, /* 2 */ 1, /* 3 */ 0, /* 4 */ 2, /* 5 */ 0, /* 6 */ 3, /* 7 */ 0, /* 8 */ 0, /* 9 */ 4, /* 10 */ 5, /* 11 */ 6, /* 12 */ 0, /* 13 */ 0, /* 14 */ 7 /* 15 */ }; #ifndef NETGRAPH MODULE_DEPEND(if_ar, sppp, 1, 1, 1); #else MODULE_DEPEND(ng_sync_ar, netgraph, 1, 1, 1); #endif static void arintr(void *arg); static void ar_xmit(struct ar_softc *sc); #ifndef NETGRAPH static void arstart(struct ifnet *ifp); static int arioctl(struct ifnet *ifp, u_long cmd, caddr_t data); static void arwatchdog(struct ifnet *ifp); #else /* NETGRAPH */ static void arstart(struct ar_softc *sc); static void arwatchdog(struct ar_softc *sc); #endif /* NETGRAPH */ static int ar_packet_avail(struct ar_softc *sc, int *len, u_char *rxstat); static void ar_copy_rxbuf(struct mbuf *m, struct ar_softc *sc, int len); static void ar_eat_packet(struct ar_softc *sc, int single); static void ar_get_packets(struct ar_softc *sc); static int ar_read_pim_iface(volatile struct ar_hardc *hc, int channel); static void ar_up(struct ar_softc *sc); static void ar_down(struct ar_softc *sc); static void arc_init(struct ar_hardc *hc); static void ar_init_sca(struct ar_hardc *hc, int scano); static void ar_init_msci(struct ar_softc *sc); static void ar_init_rx_dmac(struct ar_softc *sc); static void ar_init_tx_dmac(struct ar_softc *sc); static void ar_dmac_intr(struct ar_hardc *hc, int scano, u_char isr); static void ar_msci_intr(struct ar_hardc *hc, int scano, u_char isr); static void ar_timer_intr(struct ar_hardc *hc, int scano, u_char isr); #ifdef NETGRAPH static void ngar_watchdog_frame(void * arg); static void ngar_init(void* ignored); static ng_constructor_t ngar_constructor; static ng_rcvmsg_t ngar_rcvmsg; static ng_shutdown_t ngar_shutdown; static ng_newhook_t ngar_newhook; /*static ng_findhook_t ngar_findhook; */ static ng_connect_t ngar_connect; static ng_rcvdata_t ngar_rcvdata; static ng_disconnect_t ngar_disconnect; static struct ng_type typestruct = { NG_ABI_VERSION, NG_AR_NODE_TYPE, NULL, ngar_constructor, ngar_rcvmsg, ngar_shutdown, ngar_newhook, NULL, ngar_connect, ngar_rcvdata, ngar_disconnect, NULL }; static int ngar_done_init = 0; #endif /* NETGRAPH */ int ar_attach(device_t device) { struct ar_hardc *hc; struct ar_softc *sc; #ifndef NETGRAPH struct ifnet *ifp; char *iface; #endif /* NETGRAPH */ int unit; hc = (struct ar_hardc *)device_get_softc(device); printf("arc%d: %uK RAM, %u ports, rev %u.\n", hc->cunit, hc->memsize/1024, hc->numports, hc->revision); arc_init(hc); if(BUS_SETUP_INTR(device_get_parent(device), device, hc->res_irq, INTR_TYPE_NET, arintr, hc, &hc->intr_cookie) != 0) return (1); sc = hc->sc; for(unit=0;unitnumports;unit+=NCHAN) ar_init_sca(hc, unit / NCHAN); /* * Now configure each port on the card. */ for(unit=0;unitnumports;sc++,unit++) { sc->hc = hc; sc->subunit = unit; sc->unit = next_ar_unit; next_ar_unit++; sc->scano = unit / NCHAN; sc->scachan = unit%NCHAN; ar_init_rx_dmac(sc); ar_init_tx_dmac(sc); ar_init_msci(sc); #ifndef NETGRAPH ifp = &sc->ifsppp.pp_if; ifp->if_softc = sc; ifp->if_unit = sc->unit; ifp->if_name = "ar"; ifp->if_mtu = PP_MTU; ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST; ifp->if_ioctl = arioctl; ifp->if_start = arstart; ifp->if_watchdog = arwatchdog; sc->ifsppp.pp_flags = PP_KEEPALIVE; switch(hc->interface[unit]) { default: iface = "UNKNOWN"; break; case AR_IFACE_EIA_232: iface = "EIA-232"; break; case AR_IFACE_V_35: iface = "EIA-232 or V.35"; break; case AR_IFACE_EIA_530: iface = "EIA-530"; break; case AR_IFACE_X_21: iface = "X.21"; break; case AR_IFACE_COMBO: iface = "COMBO X.21 / EIA-530"; break; } printf("ar%d: Adapter %d, port %d, interface %s.\n", sc->unit, hc->cunit, sc->subunit, iface); sppp_attach((struct ifnet *)&sc->ifsppp); if_attach(ifp); bpfattach(ifp, DLT_PPP, PPP_HEADER_LEN); #else /* NETGRAPH */ /* * we have found a node, make sure our 'type' is availabe. */ if (ngar_done_init == 0) ngar_init(NULL); if (ng_make_node_common(&typestruct, &sc->node) != 0) return (1); sprintf(sc->nodename, "%s%d", NG_AR_NODE_TYPE, sc->unit); if (ng_name_node(sc->node, sc->nodename)) { NG_NODE_UNREF(sc->node); /* drop it again */ return (1); } NG_NODE_SET_PRIVATE(sc->node, sc); callout_handle_init(&sc->handle); sc->xmitq.ifq_maxlen = IFQ_MAXLEN; sc->xmitq_hipri.ifq_maxlen = IFQ_MAXLEN; mtx_init(&sc->xmitq.ifq_mtx, "ar_xmitq", NULL, MTX_DEF); mtx_init(&sc->xmitq_hipri.ifq_mtx, "ar_xmitq_hipri", NULL, MTX_DEF); sc->running = 0; #endif /* NETGRAPH */ } if(hc->bustype == AR_BUS_ISA) ARC_SET_OFF(hc->iobase); return (0); } int ar_detach(device_t device) { device_t parent = device_get_parent(device); struct ar_hardc *hc = device_get_softc(device); if (hc->intr_cookie != NULL) { if (BUS_TEARDOWN_INTR(parent, device, hc->res_irq, hc->intr_cookie) != 0) { printf("intr teardown failed.. continuing\n"); } hc->intr_cookie = NULL; } /* * deallocate any system resources we may have * allocated on behalf of this driver. */ FREE(hc->sc, M_DEVBUF); hc->sc = NULL; hc->mem_start = NULL; return (ar_deallocate_resources(device)); } int ar_allocate_ioport(device_t device, int rid, u_long size) { struct ar_hardc *hc = device_get_softc(device); hc->rid_ioport = rid; hc->res_ioport = bus_alloc_resource(device, SYS_RES_IOPORT, &hc->rid_ioport, 0ul, ~0ul, size, RF_ACTIVE); if (hc->res_ioport == NULL) { goto errexit; } return (0); errexit: ar_deallocate_resources(device); return (ENXIO); } int ar_allocate_irq(device_t device, int rid, u_long size) { struct ar_hardc *hc = device_get_softc(device); hc->rid_irq = rid; hc->res_irq = bus_alloc_resource(device, SYS_RES_IRQ, &hc->rid_irq, 0ul, ~0ul, 1, RF_SHAREABLE|RF_ACTIVE); if (hc->res_irq == NULL) { goto errexit; } return (0); errexit: ar_deallocate_resources(device); return (ENXIO); } int ar_allocate_memory(device_t device, int rid, u_long size) { struct ar_hardc *hc = device_get_softc(device); hc->rid_memory = rid; hc->res_memory = bus_alloc_resource(device, SYS_RES_MEMORY, &hc->rid_memory, 0ul, ~0ul, size, RF_ACTIVE); if (hc->res_memory == NULL) { goto errexit; } return (0); errexit: ar_deallocate_resources(device); return (ENXIO); } int ar_allocate_plx_memory(device_t device, int rid, u_long size) { struct ar_hardc *hc = device_get_softc(device); hc->rid_plx_memory = rid; hc->res_plx_memory = bus_alloc_resource(device, SYS_RES_MEMORY, &hc->rid_plx_memory, 0ul, ~0ul, size, RF_ACTIVE); if (hc->res_plx_memory == NULL) { goto errexit; } return (0); errexit: ar_deallocate_resources(device); return (ENXIO); } int ar_deallocate_resources(device_t device) { struct ar_hardc *hc = device_get_softc(device); if (hc->res_irq != 0) { bus_deactivate_resource(device, SYS_RES_IRQ, hc->rid_irq, hc->res_irq); bus_release_resource(device, SYS_RES_IRQ, hc->rid_irq, hc->res_irq); hc->res_irq = 0; } if (hc->res_ioport != 0) { bus_deactivate_resource(device, SYS_RES_IOPORT, hc->rid_ioport, hc->res_ioport); bus_release_resource(device, SYS_RES_IOPORT, hc->rid_ioport, hc->res_ioport); hc->res_ioport = 0; } if (hc->res_memory != 0) { bus_deactivate_resource(device, SYS_RES_MEMORY, hc->rid_memory, hc->res_memory); bus_release_resource(device, SYS_RES_MEMORY, hc->rid_memory, hc->res_memory); hc->res_memory = 0; } if (hc->res_plx_memory != 0) { bus_deactivate_resource(device, SYS_RES_MEMORY, hc->rid_plx_memory, hc->res_plx_memory); bus_release_resource(device, SYS_RES_MEMORY, hc->rid_plx_memory, hc->res_plx_memory); hc->res_plx_memory = 0; } return (0); } /* * First figure out which SCA gave the interrupt. * Process it. * See if there is other interrupts pending. * Repeat until there is no more interrupts. */ static void arintr(void *arg) { struct ar_hardc *hc = (struct ar_hardc *)arg; sca_regs *sca; u_char isr0, isr1, isr2, arisr; int scano; /* XXX Use the PCI interrupt score board register later */ if(hc->bustype == AR_BUS_PCI) arisr = hc->orbase[AR_ISTAT * 4]; else arisr = inb(hc->iobase + AR_ISTAT); while(arisr & AR_BD_INT) { TRC(printf("arisr = %x\n", arisr)); if(arisr & AR_INT_0) scano = 0; else if(arisr & AR_INT_1) scano = 1; else { /* XXX Oops this shouldn't happen. */ printf("arc%d: Interrupted with no interrupt.\n", hc->cunit); return; } sca = hc->sca[scano]; if(hc->bustype == AR_BUS_ISA) ARC_SET_SCA(hc->iobase, scano); isr0 = sca->isr0; isr1 = sca->isr1; isr2 = sca->isr2; TRC(printf("arc%d: ARINTR isr0 %x, isr1 %x, isr2 %x\n", hc->cunit, isr0, isr1, isr2)); if(isr0) ar_msci_intr(hc, scano, isr0); if(isr1) ar_dmac_intr(hc, scano, isr1); if(isr2) ar_timer_intr(hc, scano, isr2); /* * Proccess the second sca's interrupt if available. * Else see if there are any new interrupts. */ if((arisr & AR_INT_0) && (arisr & AR_INT_1)) arisr &= ~AR_INT_0; else { if(hc->bustype == AR_BUS_PCI) arisr = hc->orbase[AR_ISTAT * 4]; else arisr = inb(hc->iobase + AR_ISTAT); } } if(hc->bustype == AR_BUS_ISA) ARC_SET_OFF(hc->iobase); } /* * This will only start the transmitter. It is assumed that the data * is already there. It is normally called from arstart() or ar_dmac_intr(). * */ static void ar_xmit(struct ar_softc *sc) { #ifndef NETGRAPH struct ifnet *ifp; #endif /* NETGRAPH */ dmac_channel *dmac; #ifndef NETGRAPH ifp = &sc->ifsppp.pp_if; #endif /* NETGRAPH */ dmac = &sc->sca->dmac[DMAC_TXCH(sc->scachan)]; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); dmac->cda = (u_short)(sc->block[sc->txb_next_tx].txdesc & 0xffff); dmac->eda = (u_short)(sc->block[sc->txb_next_tx].txeda & 0xffff); dmac->dsr = SCA_DSR_DE; sc->xmit_busy = 1; sc->txb_next_tx++; if(sc->txb_next_tx == AR_TX_BLOCKS) sc->txb_next_tx = 0; #ifndef NETGRAPH ifp->if_timer = 2; /* Value in seconds. */ #else /* NETGRAPH */ sc->out_dog = DOG_HOLDOFF; /* give ourself some breathing space*/ #endif /* NETGRAPH */ if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_OFF(sc->hc->iobase); } /* * This function will be called from the upper level when a user add a * packet to be send, and from the interrupt handler after a finished * transmit. * * NOTE: it should run at spl_imp(). * * This function only place the data in the oncard buffers. It does not * start the transmition. ar_xmit() does that. * * Transmitter idle state is indicated by the IFF_OACTIVE flag. The function * that clears that should ensure that the transmitter and its DMA is * in a "good" idle state. */ #ifndef NETGRAPH static void arstart(struct ifnet *ifp) { struct ar_softc *sc = ifp->if_softc; #else /* NETGRAPH */ static void arstart(struct ar_softc *sc) { #endif /* NETGRAPH */ int i, len, tlen; struct mbuf *mtx; u_char *txdata; sca_descriptor *txdesc; struct buf_block *blkp; #ifndef NETGRAPH if(!(ifp->if_flags & IFF_RUNNING)) return; #else /* NETGRAPH */ /* XXX */ #endif /* NETGRAPH */ top_arstart: /* * See if we have space for more packets. */ if(sc->txb_inuse == AR_TX_BLOCKS) { #ifndef NETGRAPH ifp->if_flags |= IFF_OACTIVE; /* yes, mark active */ #else /* NETGRAPH */ /*XXX*/ /*ifp->if_flags |= IFF_OACTIVE;*/ /* yes, mark active */ #endif /* NETGRAPH */ return; } #ifndef NETGRAPH mtx = sppp_dequeue(ifp); #else /* NETGRAPH */ IF_DEQUEUE(&sc->xmitq_hipri, mtx); if (mtx == NULL) { IF_DEQUEUE(&sc->xmitq, mtx); } #endif /* NETGRAPH */ if(!mtx) return; /* * It is OK to set the memory window outside the loop because * all tx buffers and descriptors are assumed to be in the same * 16K window. */ if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_MEM(sc->hc->iobase, sc->block[0].txdesc); /* * We stay in this loop until there is nothing in the * TX queue left or the tx buffer is full. */ i = 0; blkp = &sc->block[sc->txb_new]; txdesc = (sca_descriptor *) (sc->hc->mem_start + (blkp->txdesc & sc->hc->winmsk)); txdata = (u_char *)(sc->hc->mem_start + (blkp->txstart & sc->hc->winmsk)); for(;;) { len = mtx->m_pkthdr.len; TRC(printf("ar%d: ARstart len %u\n", sc->unit, len)); /* * We can do this because the tx buffers don't wrap. */ m_copydata(mtx, 0, len, txdata); tlen = len; while(tlen > AR_BUF_SIZ) { txdesc->stat = 0; txdesc->len = AR_BUF_SIZ; tlen -= AR_BUF_SIZ; txdesc++; txdata += AR_BUF_SIZ; i++; } /* XXX Move into the loop? */ txdesc->stat = SCA_DESC_EOM; txdesc->len = tlen; txdesc++; txdata += AR_BUF_SIZ; i++; #ifndef NETGRAPH if(ifp->if_bpf) bpf_mtap(ifp, mtx); m_freem(mtx); ++sc->ifsppp.pp_if.if_opackets; #else /* NETGRAPH */ m_freem(mtx); sc->outbytes += len; ++sc->opackets; #endif /* NETGRAPH */ /* * Check if we have space for another mbuf. * XXX This is hardcoded. A packet won't be larger * than 3 buffers (3 x 512). */ if((i + 3) >= blkp->txmax) break; #ifndef NETGRAPH mtx = sppp_dequeue(ifp); #else /* NETGRAPH */ IF_DEQUEUE(&sc->xmitq_hipri, mtx); if (mtx == NULL) { IF_DEQUEUE(&sc->xmitq, mtx); } #endif /* NETGRAPH */ if(!mtx) break; } blkp->txtail = i; /* * Mark the last descriptor, so that the SCA know where * to stop. */ txdesc--; txdesc->stat |= SCA_DESC_EOT; txdesc = (sca_descriptor *)blkp->txdesc; blkp->txeda = (u_short)((u_int)&txdesc[i]); #if 0 printf("ARstart: %p desc->cp %x\n", &txdesc->cp, txdesc->cp); printf("ARstart: %p desc->bp %x\n", &txdesc->bp, txdesc->bp); printf("ARstart: %p desc->bpb %x\n", &txdesc->bpb, txdesc->bpb); printf("ARstart: %p desc->len %x\n", &txdesc->len, txdesc->len); printf("ARstart: %p desc->stat %x\n", &txdesc->stat, txdesc->stat); #endif sc->txb_inuse++; sc->txb_new++; if(sc->txb_new == AR_TX_BLOCKS) sc->txb_new = 0; if(sc->xmit_busy == 0) ar_xmit(sc); if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_OFF(sc->hc->iobase); goto top_arstart; } #ifndef NETGRAPH static int arioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { int s, error; int was_up, should_be_up; struct ar_softc *sc = ifp->if_softc; TRC(if_printf(ifp, "arioctl.\n");) was_up = ifp->if_flags & IFF_RUNNING; error = sppp_ioctl(ifp, cmd, data); TRC(if_printf(ifp, "ioctl: ifsppp.pp_flags = %x, if_flags %x.\n", ((struct sppp *)ifp)->pp_flags, ifp->if_flags);) if(error) return (error); if((cmd != SIOCSIFFLAGS) && cmd != (SIOCSIFADDR)) return (0); TRC(if_printf(ifp, "arioctl %s.\n", (cmd == SIOCSIFFLAGS) ? "SIOCSIFFLAGS" : "SIOCSIFADDR");) s = splimp(); should_be_up = ifp->if_flags & IFF_RUNNING; if(!was_up && should_be_up) { /* Interface should be up -- start it. */ ar_up(sc); arstart(ifp); /* XXX Maybe clear the IFF_UP flag so that the link * will only go up after sppp lcp and ipcp negotiation. */ } else if(was_up && !should_be_up) { /* Interface should be down -- stop it. */ ar_down(sc); sppp_flush(ifp); } splx(s); return (0); } #endif /* NETGRAPH */ /* * This is to catch lost tx interrupts. */ static void #ifndef NETGRAPH arwatchdog(struct ifnet *ifp) { struct ar_softc *sc = ifp->if_softc; #else /* NETGRAPH */ arwatchdog(struct ar_softc *sc) { #endif /* NETGRAPH */ msci_channel *msci = &sc->sca->msci[sc->scachan]; #ifndef NETGRAPH if(!(ifp->if_flags & IFF_RUNNING)) return; #endif /* NETGRAPH */ if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); /* XXX if(sc->ifsppp.pp_if.if_flags & IFF_DEBUG) */ printf("ar%d: transmit failed, " "ST0 %x, ST1 %x, ST3 %x, DSR %x.\n", sc->unit, msci->st0, msci->st1, msci->st3, sc->sca->dmac[DMAC_TXCH(sc->scachan)].dsr); if(msci->st1 & SCA_ST1_UDRN) { msci->cmd = SCA_CMD_TXABORT; msci->cmd = SCA_CMD_TXENABLE; msci->st1 = SCA_ST1_UDRN; } sc->xmit_busy = 0; #ifndef NETGRAPH ifp->if_flags &= ~IFF_OACTIVE; #else /* NETGRAPH */ /* XXX ifp->if_flags &= ~IFF_OACTIVE; */ #endif /* NETGRAPH */ if(sc->txb_inuse && --sc->txb_inuse) ar_xmit(sc); #ifndef NETGRAPH arstart(ifp); #else /* NETGRAPH */ arstart(sc); #endif /* NETGRAPH */ } static void ar_up(struct ar_softc *sc) { sca_regs *sca; msci_channel *msci; sca = sc->sca; msci = &sca->msci[sc->scachan]; TRC(printf("ar%d: sca %p, msci %p, ch %d\n", sc->unit, sca, msci, sc->scachan)); /* * Enable transmitter and receiver. * Raise DTR and RTS. * Enable interrupts. */ if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); /* XXX * What about using AUTO mode in msci->md0 ??? * And what about CTS/DCD etc... ? */ if(sc->hc->handshake & AR_SHSK_RTS) msci->ctl &= ~SCA_CTL_RTS; if(sc->hc->handshake & AR_SHSK_DTR) { sc->hc->txc_dtr[sc->scano] &= sc->scachan ? ~AR_TXC_DTR_DTR1 : ~AR_TXC_DTR_DTR0; if(sc->hc->bustype == AR_BUS_PCI) sc->hc->orbase[sc->hc->txc_dtr_off[sc->scano]] = sc->hc->txc_dtr[sc->scano]; else outb(sc->hc->iobase + sc->hc->txc_dtr_off[sc->scano], sc->hc->txc_dtr[sc->scano]); } if(sc->scachan == 0) { sca->ier0 |= 0x0F; sca->ier1 |= 0x0F; } else { sca->ier0 |= 0xF0; sca->ier1 |= 0xF0; } msci->cmd = SCA_CMD_RXENABLE; if(sc->hc->bustype == AR_BUS_ISA) inb(sc->hc->iobase + AR_ID_5); /* XXX slow it down a bit. */ msci->cmd = SCA_CMD_TXENABLE; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_OFF(sc->hc->iobase); #ifdef NETGRAPH untimeout(ngar_watchdog_frame, sc, sc->handle); sc->handle = timeout(ngar_watchdog_frame, sc, hz); sc->running = 1; #endif /* NETGRAPH */ } static void ar_down(struct ar_softc *sc) { sca_regs *sca; msci_channel *msci; sca = sc->sca; msci = &sca->msci[sc->scachan]; #ifdef NETGRAPH untimeout(ngar_watchdog_frame, sc, sc->handle); sc->running = 0; #endif /* NETGRAPH */ /* * Disable transmitter and receiver. * Lower DTR and RTS. * Disable interrupts. */ if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); msci->cmd = SCA_CMD_RXDISABLE; if(sc->hc->bustype == AR_BUS_ISA) inb(sc->hc->iobase + AR_ID_5); /* XXX slow it down a bit. */ msci->cmd = SCA_CMD_TXDISABLE; if(sc->hc->handshake & AR_SHSK_RTS) msci->ctl |= SCA_CTL_RTS; if(sc->hc->handshake & AR_SHSK_DTR) { sc->hc->txc_dtr[sc->scano] |= sc->scachan ? AR_TXC_DTR_DTR1 : AR_TXC_DTR_DTR0; if(sc->hc->bustype == AR_BUS_PCI) sc->hc->orbase[sc->hc->txc_dtr_off[sc->scano]] = sc->hc->txc_dtr[sc->scano]; else outb(sc->hc->iobase + sc->hc->txc_dtr_off[sc->scano], sc->hc->txc_dtr[sc->scano]); } if(sc->scachan == 0) { sca->ier0 &= ~0x0F; sca->ier1 &= ~0x0F; } else { sca->ier0 &= ~0xF0; sca->ier1 &= ~0xF0; } if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_OFF(sc->hc->iobase); } static int ar_read_pim_iface(volatile struct ar_hardc *hc, int channel) { int ctype, i, val, x; volatile u_char *pimctrl; ctype = 0; val = 0; pimctrl = hc->orbase + AR_PIMCTRL; /* Reset the PIM */ *pimctrl = 0x00; *pimctrl = AR_PIM_STROBE; /* Check if there is a PIM */ *pimctrl = 0x00; *pimctrl = AR_PIM_READ; x = *pimctrl; TRC(printf("x = %x", x)); if(x & AR_PIM_DATA) { printf("No PIM installed\n"); return (AR_IFACE_UNKNOWN); } x = (x >> 1) & 0x01; val |= x << 0; /* Now read the next 15 bits */ for(i = 1; i < 16; i++) { *pimctrl = AR_PIM_READ; *pimctrl = AR_PIM_READ | AR_PIM_STROBE; x = *pimctrl; TRC(printf(" %x ", x)); x = (x >> 1) & 0x01; val |= x << i; if(i == 8 && (val & 0x000f) == 0x0004) { int ii; /* Start bit */ *pimctrl = AR_PIM_A2D_DOUT | AR_PIM_A2D_STROBE; *pimctrl = AR_PIM_A2D_DOUT; /* Mode bit */ *pimctrl = AR_PIM_A2D_DOUT | AR_PIM_A2D_STROBE; *pimctrl = AR_PIM_A2D_DOUT; /* Sign bit */ *pimctrl = AR_PIM_A2D_DOUT | AR_PIM_A2D_STROBE; *pimctrl = AR_PIM_A2D_DOUT; /* Select channel */ *pimctrl = AR_PIM_A2D_STROBE | ((channel & 2) << 2); *pimctrl = ((channel & 2) << 2); *pimctrl = AR_PIM_A2D_STROBE | ((channel & 1) << 3); *pimctrl = ((channel & 1) << 3); *pimctrl = AR_PIM_A2D_STROBE; x = *pimctrl; if(x & AR_PIM_DATA) printf("\nOops A2D start bit not zero (%X)\n", x); for(ii = 7; ii >= 0; ii--) { *pimctrl = 0x00; *pimctrl = AR_PIM_A2D_STROBE; x = *pimctrl; if(x & AR_PIM_DATA) ctype |= 1 << ii; } } } TRC(printf("\nPIM val %x, ctype %x, %d\n", val, ctype, ctype)); *pimctrl = AR_PIM_MODEG; *pimctrl = AR_PIM_MODEG | AR_PIM_AUTO_LED; if(ctype > 255) return (AR_IFACE_UNKNOWN); if(ctype > 239) return (AR_IFACE_V_35); if(ctype > 207) return (AR_IFACE_EIA_232); if(ctype > 178) return (AR_IFACE_X_21); if(ctype > 150) return (AR_IFACE_EIA_530); if(ctype > 25) return (AR_IFACE_UNKNOWN); if(ctype > 7) return (AR_IFACE_LOOPBACK); return (AR_IFACE_UNKNOWN); } /* * Initialize the card, allocate memory for the ar_softc structures * and fill in the pointers. */ static void arc_init(struct ar_hardc *hc) { struct ar_softc *sc; int x; u_int chanmem; u_int bufmem; u_int next; u_int descneeded; u_char isr, mar; MALLOC(sc, struct ar_softc *, hc->numports * sizeof(struct ar_softc), M_DEVBUF, M_WAITOK | M_ZERO); if (sc == NULL) return; hc->sc = sc; hc->txc_dtr[0] = AR_TXC_DTR_NOTRESET | AR_TXC_DTR_DTR0 | AR_TXC_DTR_DTR1; hc->txc_dtr[1] = AR_TXC_DTR_DTR0 | AR_TXC_DTR_DTR1; hc->txc_dtr_off[0] = AR_TXC_DTR0; hc->txc_dtr_off[1] = AR_TXC_DTR2; if(hc->bustype == AR_BUS_PCI) { hc->txc_dtr_off[0] *= 4; hc->txc_dtr_off[1] *= 4; } /* * reset the card and wait at least 1uS. */ if(hc->bustype == AR_BUS_PCI) hc->orbase[AR_TXC_DTR0 * 4] = ~AR_TXC_DTR_NOTRESET & hc->txc_dtr[0]; else outb(hc->iobase + AR_TXC_DTR0, ~AR_TXC_DTR_NOTRESET & hc->txc_dtr[0]); DELAY(2); if(hc->bustype == AR_BUS_PCI) hc->orbase[AR_TXC_DTR0 * 4] = hc->txc_dtr[0]; else outb(hc->iobase + AR_TXC_DTR0, hc->txc_dtr[0]); if(hc->bustype == AR_BUS_ISA) { /* * Configure the card. * Mem address, irq, */ mar = kvtop(hc->mem_start) >> 16; isr = irqtable[hc->isa_irq] << 1; if(isr == 0) printf("ar%d: Warning illegal interrupt %d\n", hc->cunit, hc->isa_irq); isr = isr | ((kvtop(hc->mem_start) & 0xc000) >> 10); hc->sca[0] = (sca_regs *)hc->mem_start; hc->sca[1] = (sca_regs *)hc->mem_start; outb(hc->iobase + AR_MEM_SEL, mar); outb(hc->iobase + AR_INT_SEL, isr | AR_INTS_CEN); } if(hc->bustype == AR_BUS_PCI && hc->interface[0] == AR_IFACE_PIM) for(x = 0; x < hc->numports; x++) hc->interface[x] = ar_read_pim_iface(hc, x); /* * Set the TX clock direction and enable TX. */ for(x=0;xnumports;x++) { switch(hc->interface[x]) { case AR_IFACE_V_35: hc->txc_dtr[x / NCHAN] |= (x % NCHAN == 0) ? AR_TXC_DTR_TX0 : AR_TXC_DTR_TX1; hc->txc_dtr[x / NCHAN] |= (x % NCHAN == 0) ? AR_TXC_DTR_TXCS0 : AR_TXC_DTR_TXCS1; break; case AR_IFACE_EIA_530: case AR_IFACE_COMBO: case AR_IFACE_X_21: hc->txc_dtr[x / NCHAN] |= (x % NCHAN == 0) ? AR_TXC_DTR_TX0 : AR_TXC_DTR_TX1; break; } } if(hc->bustype == AR_BUS_PCI) hc->orbase[AR_TXC_DTR0 * 4] = hc->txc_dtr[0]; else outb(hc->iobase + AR_TXC_DTR0, hc->txc_dtr[0]); if(hc->numports > NCHAN) { if(hc->bustype == AR_BUS_PCI) hc->orbase[AR_TXC_DTR2 * 4] = hc->txc_dtr[1]; else outb(hc->iobase + AR_TXC_DTR2, hc->txc_dtr[1]); } chanmem = hc->memsize / hc->numports; next = 0; for(x=0;xnumports;x++, sc++) { int blk; sc->sca = hc->sca[x / NCHAN]; for(blk = 0; blk < AR_TX_BLOCKS; blk++) { sc->block[blk].txdesc = next; bufmem = (16 * 1024) / AR_TX_BLOCKS; descneeded = bufmem / AR_BUF_SIZ; sc->block[blk].txstart = sc->block[blk].txdesc + ((((descneeded * sizeof(sca_descriptor)) / AR_BUF_SIZ) + 1) * AR_BUF_SIZ); sc->block[blk].txend = next + bufmem; sc->block[blk].txmax = (sc->block[blk].txend - sc->block[blk].txstart) / AR_BUF_SIZ; next += bufmem; TRC(printf("ar%d: blk %d: txdesc %x, txstart %x, " "txend %x, txmax %d\n", x, blk, sc->block[blk].txdesc, sc->block[blk].txstart, sc->block[blk].txend, sc->block[blk].txmax)); } sc->rxdesc = next; bufmem = chanmem - (bufmem * AR_TX_BLOCKS); descneeded = bufmem / AR_BUF_SIZ; sc->rxstart = sc->rxdesc + ((((descneeded * sizeof(sca_descriptor)) / AR_BUF_SIZ) + 1) * AR_BUF_SIZ); sc->rxend = next + bufmem; sc->rxmax = (sc->rxend - sc->rxstart) / AR_BUF_SIZ; next += bufmem; TRC(printf("ar%d: rxdesc %x, rxstart %x, " "rxend %x, rxmax %d\n", x, sc->rxdesc, sc->rxstart, sc->rxend, sc->rxmax)); } if(hc->bustype == AR_BUS_PCI) hc->orbase[AR_PIMCTRL] = AR_PIM_MODEG | AR_PIM_AUTO_LED; } /* * The things done here are channel independent. * * Configure the sca waitstates. * Configure the global interrupt registers. * Enable master dma enable. */ static void ar_init_sca(struct ar_hardc *hc, int scano) { sca_regs *sca; sca = hc->sca[scano]; if(hc->bustype == AR_BUS_ISA) ARC_SET_SCA(hc->iobase, scano); /* * Do the wait registers. * Set everything to 0 wait states. */ sca->pabr0 = 0; sca->pabr1 = 0; sca->wcrl = 0; sca->wcrm = 0; sca->wcrh = 0; /* * Configure the interrupt registers. * Most are cleared until the interface is configured. */ sca->ier0 = 0x00; /* MSCI interrupts... Not used with dma. */ sca->ier1 = 0x00; /* DMAC interrupts */ sca->ier2 = 0x00; /* TIMER interrupts... Not used yet. */ sca->itcr = 0x00; /* Use ivr and no intr ack */ sca->ivr = 0x40; /* Fill in the interrupt vector. */ sca->imvr = 0x40; /* * Configure the timers. * XXX Later */ /* * Set the DMA channel priority to rotate between * all four channels. * * Enable all dma channels. */ if(hc->bustype == AR_BUS_PCI) { u_char *t; /* * Stupid problem with the PCI interface chip that break * things. * XXX */ t = (u_char *)sca; t[AR_PCI_SCA_PCR] = SCA_PCR_PR2; t[AR_PCI_SCA_DMER] = SCA_DMER_EN; } else { sca->pcr = SCA_PCR_PR2; sca->dmer = SCA_DMER_EN; } } /* * Configure the msci * * NOTE: The serial port configuration is hardcoded at the moment. */ static void ar_init_msci(struct ar_softc *sc) { msci_channel *msci; msci = &sc->sca->msci[sc->scachan]; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); msci->cmd = SCA_CMD_RESET; msci->md0 = SCA_MD0_CRC_1 | SCA_MD0_CRC_CCITT | SCA_MD0_CRC_ENABLE | SCA_MD0_MODE_HDLC; msci->md1 = SCA_MD1_NOADDRCHK; msci->md2 = SCA_MD2_DUPLEX | SCA_MD2_NRZ; /* * Acording to the manual I should give a reset after changing the * mode registers. */ msci->cmd = SCA_CMD_RXRESET; msci->ctl = SCA_CTL_IDLPAT | SCA_CTL_UDRNC | SCA_CTL_RTS; /* * For now all interfaces are programmed to use the RX clock for * the TX clock. */ switch(sc->hc->interface[sc->subunit]) { case AR_IFACE_V_35: msci->rxs = SCA_RXS_CLK_RXC0 | SCA_RXS_DIV1; msci->txs = SCA_TXS_CLK_TXC | SCA_TXS_DIV1; break; case AR_IFACE_X_21: case AR_IFACE_EIA_530: case AR_IFACE_COMBO: msci->rxs = SCA_RXS_CLK_RXC0 | SCA_RXS_DIV1; msci->txs = SCA_TXS_CLK_RX | SCA_TXS_DIV1; } msci->tmc = 153; /* This give 64k for loopback */ /* XXX * Disable all interrupts for now. I think if you are using * the dmac you don't use these interrupts. */ msci->ie0 = 0; msci->ie1 = 0x0C; /* XXX CTS and DCD (DSR on 570I) level change. */ msci->ie2 = 0; msci->fie = 0; msci->sa0 = 0; msci->sa1 = 0; msci->idl = 0x7E; /* XXX This is what cisco does. */ /* * This is what the ARNET diags use. */ msci->rrc = 0x0E; msci->trc0 = 0x12; msci->trc1 = 0x1F; } /* * Configure the rx dma controller. */ static void ar_init_rx_dmac(struct ar_softc *sc) { dmac_channel *dmac; sca_descriptor *rxd; u_int rxbuf; u_int rxda; u_int rxda_d; int x = 0; dmac = &sc->sca->dmac[DMAC_RXCH(sc->scachan)]; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_MEM(sc->hc->iobase, sc->rxdesc); rxd = (sca_descriptor *)(sc->hc->mem_start + (sc->rxdesc&sc->hc->winmsk)); rxda_d = (u_int)sc->hc->mem_start - (sc->rxdesc & ~sc->hc->winmsk); for(rxbuf=sc->rxstart;rxbufrxend;rxbuf += AR_BUF_SIZ, rxd++) { rxda = (u_int)&rxd[1] - rxda_d; rxd->cp = (u_short)(rxda & 0xfffful); x++; if(x < 6) TRC(printf("Descrp %p, data pt %x, data %x, ", rxd, rxda, rxbuf)); rxd->bp = (u_short)(rxbuf & 0xfffful); rxd->bpb = (u_char)((rxbuf >> 16) & 0xff); rxd->len = 0; rxd->stat = 0xff; /* The sca write here when it is finished. */ if(x < 6) TRC(printf("bpb %x, bp %x.\n", rxd->bpb, rxd->bp)); } rxd--; rxd->cp = (u_short)(sc->rxdesc & 0xfffful); sc->rxhind = 0; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); dmac->dsr = 0; /* Disable DMA transfer */ dmac->dcr = SCA_DCR_ABRT; /* XXX maybe also SCA_DMR_CNTE */ dmac->dmr = SCA_DMR_TMOD | SCA_DMR_NF; dmac->bfl = AR_BUF_SIZ; dmac->cda = (u_short)(sc->rxdesc & 0xffff); dmac->sarb = (u_char)((sc->rxdesc >> 16) & 0xff); rxd = (sca_descriptor *)sc->rxstart; dmac->eda = (u_short)((u_int)&rxd[sc->rxmax - 1] & 0xffff); dmac->dir = 0xF0; dmac->dsr = SCA_DSR_DE; } /* * Configure the TX DMA descriptors. * Initialize the needed values and chain the descriptors. */ static void ar_init_tx_dmac(struct ar_softc *sc) { dmac_channel *dmac; struct buf_block *blkp; int blk; sca_descriptor *txd; u_int txbuf; u_int txda; u_int txda_d; dmac = &sc->sca->dmac[DMAC_TXCH(sc->scachan)]; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_MEM(sc->hc->iobase, sc->block[0].txdesc); for(blk = 0; blk < AR_TX_BLOCKS; blk++) { blkp = &sc->block[blk]; txd = (sca_descriptor *)(sc->hc->mem_start + (blkp->txdesc&sc->hc->winmsk)); txda_d = (u_int)sc->hc->mem_start - (blkp->txdesc & ~sc->hc->winmsk); txbuf=blkp->txstart; for(;txbuftxend;txbuf += AR_BUF_SIZ, txd++) { txda = (u_int)&txd[1] - txda_d; txd->cp = (u_short)(txda & 0xfffful); txd->bp = (u_short)(txbuf & 0xfffful); txd->bpb = (u_char)((txbuf >> 16) & 0xff); TRC(printf("ar%d: txbuf %x, bpb %x, bp %x\n", sc->unit, txbuf, txd->bpb, txd->bp)); txd->len = 0; txd->stat = 0; } txd--; txd->cp = (u_short)(blkp->txdesc & 0xfffful); blkp->txtail = (u_int)txd - (u_int)sc->hc->mem_start; TRC(printf("TX Descriptors start %x, end %x.\n", blkp->txdesc, blkp->txtail)); } if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); dmac->dsr = 0; /* Disable DMA */ dmac->dcr = SCA_DCR_ABRT; dmac->dmr = SCA_DMR_TMOD | SCA_DMR_NF; dmac->dir = SCA_DIR_EOT | SCA_DIR_BOF | SCA_DIR_COF; dmac->sarb = (u_char)((sc->block[0].txdesc >> 16) & 0xff); } /* * Look through the descriptors to see if there is a complete packet * available. Stop if we get to where the sca is busy. * * Return the length and status of the packet. * Return nonzero if there is a packet available. * * NOTE: * It seems that we get the interrupt a bit early. The updateing of * descriptor values is not always completed when this is called. */ static int ar_packet_avail(struct ar_softc *sc, int *len, u_char *rxstat) { dmac_channel *dmac; sca_descriptor *rxdesc; sca_descriptor *endp; sca_descriptor *cda; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); dmac = &sc->sca->dmac[DMAC_RXCH(sc->scachan)]; cda = (sca_descriptor *)(sc->hc->mem_start + ((((u_int)dmac->sarb << 16) + dmac->cda) & sc->hc->winmsk)); if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_MEM(sc->hc->iobase, sc->rxdesc); rxdesc = (sca_descriptor *) (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk)); endp = rxdesc; rxdesc = &rxdesc[sc->rxhind]; endp = &endp[sc->rxmax]; *len = 0; while(rxdesc != cda) { *len += rxdesc->len; if(rxdesc->stat & SCA_DESC_EOM) { *rxstat = rxdesc->stat; TRC(printf("ar%d: PKT AVAIL len %d, %x.\n", sc->unit, *len, *rxstat)); return (1); } rxdesc++; if(rxdesc == endp) rxdesc = (sca_descriptor *) (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk)); } *len = 0; *rxstat = 0; return (0); } /* * Copy a packet from the on card memory into a provided mbuf. * Take into account that buffers wrap and that a packet may * be larger than a buffer. */ static void ar_copy_rxbuf(struct mbuf *m, struct ar_softc *sc, int len) { sca_descriptor *rxdesc; u_int rxdata; u_int rxmax; u_int off = 0; u_int tlen; rxdata = sc->rxstart + (sc->rxhind * AR_BUF_SIZ); rxmax = sc->rxstart + (sc->rxmax * AR_BUF_SIZ); rxdesc = (sca_descriptor *) (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk)); rxdesc = &rxdesc[sc->rxhind]; while(len) { tlen = (len < AR_BUF_SIZ) ? len : AR_BUF_SIZ; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_MEM(sc->hc->iobase, rxdata); bcopy(sc->hc->mem_start + (rxdata & sc->hc->winmsk), mtod(m, caddr_t) + off, tlen); off += tlen; len -= tlen; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_MEM(sc->hc->iobase, sc->rxdesc); rxdesc->len = 0; rxdesc->stat = 0xff; rxdata += AR_BUF_SIZ; rxdesc++; if(rxdata == rxmax) { rxdata = sc->rxstart; rxdesc = (sca_descriptor *) (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk)); } } } /* * If single is set, just eat a packet. Otherwise eat everything up to * where cda points. Update pointers to point to the next packet. */ static void ar_eat_packet(struct ar_softc *sc, int single) { dmac_channel *dmac; sca_descriptor *rxdesc; sca_descriptor *endp; sca_descriptor *cda; int loopcnt = 0; u_char stat; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); dmac = &sc->sca->dmac[DMAC_RXCH(sc->scachan)]; cda = (sca_descriptor *)(sc->hc->mem_start + ((((u_int)dmac->sarb << 16) + dmac->cda) & sc->hc->winmsk)); /* * Loop until desc->stat == (0xff || EOM) * Clear the status and length in the descriptor. * Increment the descriptor. */ if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_MEM(sc->hc->iobase, sc->rxdesc); rxdesc = (sca_descriptor *) (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk)); endp = rxdesc; rxdesc = &rxdesc[sc->rxhind]; endp = &endp[sc->rxmax]; while(rxdesc != cda) { loopcnt++; if(loopcnt > sc->rxmax) { printf("ar%d: eat pkt %d loop, cda %p, " "rxdesc %p, stat %x.\n", sc->unit, loopcnt, (void *)cda, (void *)rxdesc, rxdesc->stat); break; } stat = rxdesc->stat; rxdesc->len = 0; rxdesc->stat = 0xff; rxdesc++; sc->rxhind++; if(rxdesc == endp) { rxdesc = (sca_descriptor *) (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk)); sc->rxhind = 0; } if(single && (stat == SCA_DESC_EOM)) break; } /* * Update the eda to the previous descriptor. */ if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); rxdesc = (sca_descriptor *)sc->rxdesc; rxdesc = &rxdesc[(sc->rxhind + sc->rxmax - 2 ) % sc->rxmax]; sc->sca->dmac[DMAC_RXCH(sc->scachan)].eda = (u_short)((u_int)rxdesc & 0xffff); } /* * While there is packets available in the rx buffer, read them out * into mbufs and ship them off. */ static void ar_get_packets(struct ar_softc *sc) { sca_descriptor *rxdesc; struct mbuf *m = NULL; int i; int len; u_char rxstat; #ifdef NETGRAPH int error; #endif while(ar_packet_avail(sc, &len, &rxstat)) { TRC(printf("apa: len %d, rxstat %x\n", len, rxstat)); if(((rxstat & SCA_DESC_ERRORS) == 0) && (len < MCLBYTES)) { MGETHDR(m, M_DONTWAIT, MT_DATA); if(m == NULL) { /* eat packet if get mbuf fail!! */ ar_eat_packet(sc, 1); continue; } #ifndef NETGRAPH m->m_pkthdr.rcvif = &sc->ifsppp.pp_if; #else /* NETGRAPH */ m->m_pkthdr.rcvif = NULL; sc->inbytes += len; sc->inlast = 0; #endif /* NETGRAPH */ m->m_pkthdr.len = m->m_len = len; if(len > MHLEN) { MCLGET(m, M_DONTWAIT); if((m->m_flags & M_EXT) == 0) { m_freem(m); ar_eat_packet(sc, 1); continue; } } ar_copy_rxbuf(m, sc, len); #ifndef NETGRAPH if(sc->ifsppp.pp_if.if_bpf) bpf_mtap(&sc->ifsppp.pp_if, m); sppp_input(&sc->ifsppp.pp_if, m); sc->ifsppp.pp_if.if_ipackets++; #else /* NETGRAPH */ NG_SEND_DATA_ONLY(error, sc->hook, m); sc->ipackets++; #endif /* NETGRAPH */ /* * Update the eda to the previous descriptor. */ i = (len + AR_BUF_SIZ - 1) / AR_BUF_SIZ; sc->rxhind = (sc->rxhind + i) % sc->rxmax; if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); rxdesc = (sca_descriptor *)sc->rxdesc; rxdesc = &rxdesc[(sc->rxhind + sc->rxmax - 2 ) % sc->rxmax]; sc->sca->dmac[DMAC_RXCH(sc->scachan)].eda = (u_short)((u_int)rxdesc & 0xffff); } else { int tries = 5; while((rxstat == 0xff) && --tries) ar_packet_avail(sc, &len, &rxstat); /* * It look like we get an interrupt early * sometimes and then the status is not * filled in yet. */ if(tries && (tries != 5)) continue; ar_eat_packet(sc, 1); #ifndef NETGRAPH sc->ifsppp.pp_if.if_ierrors++; #else /* NETGRAPH */ sc->ierrors[0]++; #endif /* NETGRAPH */ if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_SCA(sc->hc->iobase, sc->scano); TRCL(printf("ar%d: Receive error chan %d, " "stat %x, msci st3 %x," "rxhind %d, cda %x, eda %x.\n", sc->unit, sc->scachan, rxstat, sc->sca->msci[sc->scachan].st3, sc->rxhind, sc->sca->dmac[ DMAC_RXCH(sc->scachan)].cda, sc->sca->dmac[ DMAC_RXCH(sc->scachan)].eda)); } } } /* * All DMA interrupts come here. * * Each channel has two interrupts. * Interrupt A for errors and Interrupt B for normal stuff like end * of transmit or receive dmas. */ static void ar_dmac_intr(struct ar_hardc *hc, int scano, u_char isr1) { u_char dsr; u_char dotxstart = isr1; int mch; struct ar_softc *sc; sca_regs *sca; dmac_channel *dmac; sca = hc->sca[scano]; mch = 0; /* * Shortcut if there is no interrupts for dma channel 0 or 1 */ if((isr1 & 0x0F) == 0) { mch = 1; isr1 >>= 4; } do { sc = &hc->sc[mch + (NCHAN * scano)]; /* * Transmit channel */ if(isr1 & 0x0C) { dmac = &sca->dmac[DMAC_TXCH(mch)]; if(hc->bustype == AR_BUS_ISA) ARC_SET_SCA(hc->iobase, scano); dsr = dmac->dsr; dmac->dsr = dsr; /* Counter overflow */ if(dsr & SCA_DSR_COF) { printf("ar%d: TX DMA Counter overflow, " "txpacket no %lu.\n", sc->unit, #ifndef NETGRAPH sc->ifsppp.pp_if.if_opackets); sc->ifsppp.pp_if.if_oerrors++; #else /* NETGRAPH */ sc->opackets); sc->oerrors++; #endif /* NETGRAPH */ } /* Buffer overflow */ if(dsr & SCA_DSR_BOF) { printf("ar%d: TX DMA Buffer overflow, " "txpacket no %lu, dsr %02x, " "cda %04x, eda %04x.\n", sc->unit, #ifndef NETGRAPH sc->ifsppp.pp_if.if_opackets, #else /* NETGRAPH */ sc->opackets, #endif /* NETGRAPH */ dsr, dmac->cda, dmac->eda); #ifndef NETGRAPH sc->ifsppp.pp_if.if_oerrors++; #else /* NETGRAPH */ sc->oerrors++; #endif /* NETGRAPH */ } /* End of Transfer */ if(dsr & SCA_DSR_EOT) { /* * This should be the most common case. * * Clear the IFF_OACTIVE flag. * * Call arstart to start a new transmit if * there is data to transmit. */ sc->xmit_busy = 0; #ifndef NETGRAPH sc->ifsppp.pp_if.if_flags &= ~IFF_OACTIVE; sc->ifsppp.pp_if.if_timer = 0; #else /* NETGRAPH */ /* XXX c->ifsppp.pp_if.if_flags &= ~IFF_OACTIVE; */ sc->out_dog = 0; /* XXX */ #endif /* NETGRAPH */ if(sc->txb_inuse && --sc->txb_inuse) ar_xmit(sc); } } /* * Receive channel */ if(isr1 & 0x03) { dmac = &sca->dmac[DMAC_RXCH(mch)]; if(hc->bustype == AR_BUS_ISA) ARC_SET_SCA(hc->iobase, scano); dsr = dmac->dsr; dmac->dsr = dsr; TRC(printf("AR: RX DSR %x\n", dsr)); /* End of frame */ if(dsr & SCA_DSR_EOM) { TRC(int tt = sc->ifsppp.pp_if.if_ipackets;) TRC(int ind = sc->rxhind;) ar_get_packets(sc); #ifndef NETGRAPH #define IPACKETS sc->ifsppp.pp_if.if_ipackets #else /* NETGRAPH */ #define IPACKETS sc->ipackets #endif /* NETGRAPH */ TRC(if(tt == IPACKETS) { sca_descriptor *rxdesc; int i; if(hc->bustype == AR_BUS_ISA) ARC_SET_SCA(hc->iobase, scano); printf("AR: RXINTR isr1 %x, dsr %x, " "no data %d pkts, orxhind %d.\n", dotxstart, dsr, tt, ind); printf("AR: rxdesc %x, rxstart %x, " "rxend %x, rxhind %d, " "rxmax %d.\n", sc->rxdesc, sc->rxstart, sc->rxend, sc->rxhind, sc->rxmax); printf("AR: cda %x, eda %x.\n", dmac->cda, dmac->eda); if(sc->hc->bustype == AR_BUS_ISA) ARC_SET_MEM(sc->hc->iobase, sc->rxdesc); rxdesc = (sca_descriptor *) (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk)); rxdesc = &rxdesc[sc->rxhind]; for(i=0;i<3;i++,rxdesc++) printf("AR: rxdesc->stat %x, " "len %d.\n", rxdesc->stat, rxdesc->len); }) } /* Counter overflow */ if(dsr & SCA_DSR_COF) { printf("ar%d: RX DMA Counter overflow, " "rxpkts %lu.\n", sc->unit, #ifndef NETGRAPH sc->ifsppp.pp_if.if_ipackets); sc->ifsppp.pp_if.if_ierrors++; #else /* NETGRAPH */ sc->ipackets); sc->ierrors[1]++; #endif /* NETGRAPH */ } /* Buffer overflow */ if(dsr & SCA_DSR_BOF) { if(hc->bustype == AR_BUS_ISA) ARC_SET_SCA(hc->iobase, scano); printf("ar%d: RX DMA Buffer overflow, " "rxpkts %lu, rxind %d, " "cda %x, eda %x, dsr %x.\n", sc->unit, #ifndef NETGRAPH sc->ifsppp.pp_if.if_ipackets, #else /* NETGRAPH */ sc->ipackets, #endif /* NETGRAPH */ sc->rxhind, dmac->cda, dmac->eda, dsr); /* * Make sure we eat as many as possible. * Then get the system running again. */ ar_eat_packet(sc, 0); #ifndef NETGRAPH sc->ifsppp.pp_if.if_ierrors++; #else /* NETGRAPH */ sc->ierrors[2]++; #endif /* NETGRAPH */ if(hc->bustype == AR_BUS_ISA) ARC_SET_SCA(hc->iobase, scano); sca->msci[mch].cmd = SCA_CMD_RXMSGREJ; dmac->dsr = SCA_DSR_DE; TRC(printf("ar%d: RX DMA Buffer overflow, " "rxpkts %lu, rxind %d, " "cda %x, eda %x, dsr %x. After\n", sc->unit, sc->ifsppp.pp_if.if_ipackets, sc->rxhind, dmac->cda, dmac->eda, dmac->dsr);) } /* End of Transfer */ if(dsr & SCA_DSR_EOT) { /* * If this happen, it means that we are * receiving faster than what the processor * can handle. * * XXX We should enable the dma again. */ printf("ar%d: RX End of transfer, rxpkts %lu.\n", sc->unit, #ifndef NETGRAPH sc->ifsppp.pp_if.if_ipackets); sc->ifsppp.pp_if.if_ierrors++; #else /* NETGRAPH */ sc->ipackets); sc->ierrors[3]++; #endif /* NETGRAPH */ } } isr1 >>= 4; mch++; }while((mchsc[mch + (NCHAN * scano)]; #ifndef NETGRAPH arstart(&sc->ifsppp.pp_if); #else /* NETGRAPH */ arstart(sc); #endif /* NETGRAPH */ } dotxstart >>= 4; } } static void ar_msci_intr(struct ar_hardc *hc, int scano, u_char isr0) { printf("arc%d: ARINTR: MSCI\n", hc->cunit); } static void ar_timer_intr(struct ar_hardc *hc, int scano, u_char isr2) { printf("arc%d: ARINTR: TIMER\n", hc->cunit); } #ifdef NETGRAPH /***************************************** * Device timeout/watchdog routine. * called once per second. * checks to see that if activity was expected, that it hapenned. * At present we only look to see if expected output was completed. */ static void ngar_watchdog_frame(void * arg) { struct ar_softc * sc = arg; int s; int speed; if(sc->running == 0) return; /* if we are not running let timeouts die */ /* * calculate the apparent throughputs * XXX a real hack */ s = splimp(); speed = sc->inbytes - sc->lastinbytes; sc->lastinbytes = sc->inbytes; if ( sc->inrate < speed ) sc->inrate = speed; speed = sc->outbytes - sc->lastoutbytes; sc->lastoutbytes = sc->outbytes; if ( sc->outrate < speed ) sc->outrate = speed; sc->inlast++; splx(s); if ((sc->inlast > QUITE_A_WHILE) && (sc->out_deficit > LOTS_OF_PACKETS)) { log(LOG_ERR, "ar%d: No response from remote end\n", sc->unit); s = splimp(); ar_down(sc); ar_up(sc); sc->inlast = sc->out_deficit = 0; splx(s); } else if ( sc->xmit_busy ) { /* no TX -> no TX timeouts */ if (sc->out_dog == 0) { log(LOG_ERR, "ar%d: Transmit failure.. no clock?\n", sc->unit); s = splimp(); arwatchdog(sc); #if 0 ar_down(sc); ar_up(sc); #endif splx(s); sc->inlast = sc->out_deficit = 0; } else { sc->out_dog--; } } sc->handle = timeout(ngar_watchdog_frame, sc, hz); } /*********************************************************************** * This section contains the methods for the Netgraph interface ***********************************************************************/ /* * It is not possible or allowable to create a node of this type. * If the hardware exists, it will already have created it. */ static int ngar_constructor(node_p node) { return (EINVAL); } /* * give our ok for a hook to be added... * If we are not running this should kick the device into life. * The hook's private info points to our stash of info about that * channel. */ static int ngar_newhook(node_p node, hook_p hook, const char *name) { struct ar_softc * sc = NG_NODE_PRIVATE(node); /* * check if it's our friend the debug hook */ if (strcmp(name, NG_AR_HOOK_DEBUG) == 0) { NG_HOOK_SET_PRIVATE(hook, NULL); /* paranoid */ sc->debug_hook = hook; return (0); } /* * Check for raw mode hook. */ if (strcmp(name, NG_AR_HOOK_RAW) != 0) { return (EINVAL); } NG_HOOK_SET_PRIVATE(hook, sc); sc->hook = hook; sc->datahooks++; ar_up(sc); return (0); } /* * incoming messages. * Just respond to the generic TEXT_STATUS message */ static int ngar_rcvmsg(node_p node, item_p item, hook_p lasthook) { struct ar_softc * sc; struct ng_mesg *resp = NULL; int error = 0; struct ng_mesg *msg; NGI_GET_MSG(item, msg); sc = NG_NODE_PRIVATE(node); switch (msg->header.typecookie) { case NG_AR_COOKIE: error = EINVAL; break; case NGM_GENERIC_COOKIE: switch(msg->header.cmd) { case NGM_TEXT_STATUS: { char *arg; int pos = 0; int resplen = sizeof(struct ng_mesg) + 512; NG_MKRESPONSE(resp, msg, resplen, M_NOWAIT); if (resp == NULL) { error = ENOMEM; break; } arg = (resp)->data; pos = sprintf(arg, "%ld bytes in, %ld bytes out\n" "highest rate seen: %ld B/S in, %ld B/S out\n", sc->inbytes, sc->outbytes, sc->inrate, sc->outrate); pos += sprintf(arg + pos, "%ld output errors\n", sc->oerrors); pos += sprintf(arg + pos, "ierrors = %ld, %ld, %ld, %ld\n", sc->ierrors[0], sc->ierrors[1], sc->ierrors[2], sc->ierrors[3]); resp->header.arglen = pos + 1; break; } default: error = EINVAL; break; } break; default: error = EINVAL; break; } /* Take care of synchronous response, if any */ NG_RESPOND_MSG(error, node, item, resp); NG_FREE_MSG(msg); return (error); } /* * get data from another node and transmit it to the correct channel */ static int ngar_rcvdata(hook_p hook, item_p item) { int s; int error = 0; struct ar_softc * sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); struct ifqueue *xmitq_p; struct mbuf *m; meta_p meta; NGI_GET_M(item, m); NGI_GET_META(item, meta); NG_FREE_ITEM(item); /* * data doesn't come in from just anywhere (e.g control hook) */ if ( NG_HOOK_PRIVATE(hook) == NULL) { error = ENETDOWN; goto bad; } /* * Now queue the data for when it can be sent */ if (meta && meta->priority > 0) { xmitq_p = (&sc->xmitq_hipri); } else { xmitq_p = (&sc->xmitq); } s = splimp(); IF_LOCK(xmitq_p); if (_IF_QFULL(xmitq_p)) { _IF_DROP(xmitq_p); IF_UNLOCK(xmitq_p); splx(s); error = ENOBUFS; goto bad; } _IF_ENQUEUE(xmitq_p, m); IF_UNLOCK(xmitq_p); arstart(sc); splx(s); return (0); bad: /* * It was an error case. * check if we need to free the mbuf, and then return the error */ NG_FREE_M(m); NG_FREE_META(meta); return (error); } /* * do local shutdown processing.. * this node will refuse to go away, unless the hardware says to.. * don't unref the node, or remove our name. just clear our links up. */ static int ngar_shutdown(node_p node) { struct ar_softc * sc = NG_NODE_PRIVATE(node); ar_down(sc); NG_NODE_UNREF(node); /* XXX need to drain the output queues! */ /* The node is dead, long live the node! */ /* stolen from the attach routine */ if (ng_make_node_common(&typestruct, &sc->node) != 0) return (0); sprintf(sc->nodename, "%s%d", NG_AR_NODE_TYPE, sc->unit); if (ng_name_node(sc->node, sc->nodename)) { sc->node = NULL; printf("node naming failed\n"); NG_NODE_UNREF(sc->node); /* node dissappears */ return (0); } NG_NODE_SET_PRIVATE(sc->node, sc); sc->running = 0; return (0); } /* already linked */ static int ngar_connect(hook_p hook) { /* probably not at splnet, force outward queueing */ NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook)); /* be really amiable and just say "YUP that's OK by me! " */ return (0); } /* * notify on hook disconnection (destruction) * * Invalidate the private data associated with this dlci. * For this type, removal of the last link resets tries to destroy the node. * As the device still exists, the shutdown method will not actually * destroy the node, but reset the device and leave it 'fresh' :) * * The node removal code will remove all references except that owned by the * driver. */ static int ngar_disconnect(hook_p hook) { struct ar_softc * sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); int s; /* * If it's the data hook, then free resources etc. */ if (NG_HOOK_PRIVATE(hook)) { s = splimp(); sc->datahooks--; if (sc->datahooks == 0) ar_down(sc); splx(s); } else { sc->debug_hook = NULL; } return (0); } /* * called during bootup * or LKM loading to put this type into the list of known modules */ static void ngar_init(void *ignored) { if (ng_newtype(&typestruct)) printf("ngar install failed\n"); ngar_done_init = 1; } #endif /* NETGRAPH */ /* ********************************* END ************************************ */