diff options
author | fjoe <fjoe@FreeBSD.org> | 2002-01-08 20:03:13 +0000 |
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committer | fjoe <fjoe@FreeBSD.org> | 2002-01-08 20:03:13 +0000 |
commit | 2053aff54edfb4c3ac126a8b88700dbc70a7969f (patch) | |
tree | bb285377f57f0c2656c28eaca30fbc3434b7cb8a /sys/dev/cm/smc90cx6.c | |
parent | 849d50be93de0733f49a8209a1729f2787710113 (diff) | |
download | FreeBSD-src-2053aff54edfb4c3ac126a8b88700dbc70a7969f.zip FreeBSD-src-2053aff54edfb4c3ac126a8b88700dbc70a7969f.tar.gz |
- generic Arcnet framework
- device driver for SMC COM90cx6 Arcnet network adapters
Obtained from: NetBSD
Diffstat (limited to 'sys/dev/cm/smc90cx6.c')
-rw-r--r-- | sys/dev/cm/smc90cx6.c | 1071 |
1 files changed, 1071 insertions, 0 deletions
diff --git a/sys/dev/cm/smc90cx6.c b/sys/dev/cm/smc90cx6.c new file mode 100644 index 0000000..a5dfb9c --- /dev/null +++ b/sys/dev/cm/smc90cx6.c @@ -0,0 +1,1071 @@ +/* $NetBSD: smc90cx6.c,v 1.38 2001/07/07 15:57:53 thorpej Exp $ */ +/* $FreeBSD$ */ + +/*- + * Copyright (c) 1994, 1995, 1998 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Ignatios Souvatzis. + * + * 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 the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. + */ + +/* + * Chip core driver for the SMC90c26 / SMC90c56 (and SMC90c66 in '56 + * compatibility mode) boards + */ + +/* #define CMSOFTCOPY */ +#define CMRETRANSMIT /**/ +#undef CM_DEBUG + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/sockio.h> +#include <sys/mbuf.h> +#include <sys/module.h> +#include <sys/kernel.h> +#include <sys/socket.h> +#include <sys/syslog.h> +#include <sys/bus.h> + +#include <machine/bus.h> +#include <sys/rman.h> +#include <machine/resource.h> + +#if __FreeBSD_version < 500000 +#include <machine/clock.h> +#endif + +#include <net/if.h> +#include <net/if_dl.h> +#include <net/if_types.h> +#include <net/if_arc.h> +#include <net/bpf.h> + +#if 0 +#if NBPFILTER > 0 +#include <net/bpfdesc.h> +#endif +#endif + +#include <dev/cm/smc90cx6reg.h> +#include <dev/cm/smc90cx6var.h> + +MODULE_DEPEND(if_cm, arcnet, 1, 1, 1); + +/* these should be elsewhere */ + +#define ARC_MIN_LEN 1 +#define ARC_MIN_FORBID_LEN 254 +#define ARC_MAX_FORBID_LEN 256 +#define ARC_MAX_LEN 508 +#define ARC_ADDR_LEN 1 + +/* for watchdog timer. This should be more than enough. */ +#define ARCTIMEOUT (5*IFNET_SLOWHZ) + +/* short notation */ + +#define GETREG(off) \ + bus_space_read_1(rman_get_bustag((sc)->port_res), \ + rman_get_bushandle((sc)->port_res), \ + (off)) +#define PUTREG(off, value) \ + bus_space_write_1(rman_get_bustag((sc)->port_res), \ + rman_get_bushandle((sc)->port_res), \ + (off), (value)) +#define GETMEM(off) \ + bus_space_read_1(rman_get_bustag((sc)->mem_res), \ + rman_get_bushandle((sc)->mem_res), \ + (off)) +#define PUTMEM(off, value) \ + bus_space_write_1(rman_get_bustag((sc)->mem_res), \ + rman_get_bushandle((sc)->mem_res), \ + (off), (value)) + +devclass_t cm_devclass; + +/* + * This currently uses 2 bufs for tx, 2 for rx + * + * New rx protocol: + * + * rx has a fillcount variable. If fillcount > (NRXBUF-1), + * rx can be switched off from rx hard int. + * Else rx is restarted on the other receiver. + * rx soft int counts down. if it is == (NRXBUF-1), it restarts + * the receiver. + * To ensure packet ordering (we need that for 1201 later), we have a counter + * which is incremented modulo 256 on each receive and a per buffer + * variable, which is set to the counter on filling. The soft int can + * compare both values to determine the older packet. + * + * Transmit direction: + * + * cm_start checks tx_fillcount + * case 2: return + * + * else fill tx_act ^ 1 && inc tx_fillcount + * + * check tx_fillcount again. + * case 2: set IFF_OACTIVE to stop arc_output from filling us. + * case 1: start tx + * + * tint clears IFF_OCATIVE, decrements and checks tx_fillcount + * case 1: start tx on tx_act ^ 1, softcall cm_start + * case 0: softcall cm_start + * + * #define fill(i) get mbuf && copy mbuf to chip(i) + */ + +void cm_init __P((void *)); +void cm_reset __P((struct cm_softc *)); +void cm_start __P((struct ifnet *)); +int cm_ioctl __P((struct ifnet *, unsigned long, caddr_t)); +void cm_watchdog __P((struct ifnet *)); +void cm_srint __P((void *vsc)); +static void cm_tint __P((struct cm_softc *, int)); +void cm_reconwatch(void *); + +int +cm_probe(dev) + device_t dev; +{ + int error; + struct cm_softc *sc = device_get_softc(dev); + + error = cm_alloc_port(dev, 0, CM_IO_PORTS); + if (error) + return error; + + if (GETREG(CMSTAT) == 0xff) + return ENXIO; + + error = cm_alloc_memory(dev, 0, 0x800); + if (error) + return error; + + return 0; +} + +/* + * Allocate a port resource with the given resource id. + */ +int +cm_alloc_port(dev, rid, size) + device_t dev; + int rid; + int size; +{ + struct cm_softc *sc = device_get_softc(dev); + struct resource *res; + + res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, + 0ul, ~0ul, size, RF_ACTIVE); + if (res) { + sc->port_rid = rid; + sc->port_res = res; + sc->port_used = size; + return (0); + } else { + return (ENOENT); + } +} + +/* + * Allocate a memory resource with the given resource id. + */ +int +cm_alloc_memory(dev, rid, size) + device_t dev; + int rid; + int size; +{ + struct cm_softc *sc = device_get_softc(dev); + struct resource *res; + + res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, + 0ul, ~0ul, size, RF_ACTIVE); + if (res) { + sc->mem_rid = rid; + sc->mem_res = res; + sc->mem_used = size; + return (0); + } else { + return (ENOENT); + } +} + +/* + * Allocate an irq resource with the given resource id. + */ +int +cm_alloc_irq(dev, rid) + device_t dev; + int rid; +{ + struct cm_softc *sc = device_get_softc(dev); + struct resource *res; + + res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, + 0ul, ~0ul, 1, RF_ACTIVE); + if (res) { + sc->irq_rid = rid; + sc->irq_res = res; + return (0); + } else { + return (ENOENT); + } +} + +/* + * Release all resources + */ +void +cm_release_resources(dev) + device_t dev; +{ + struct cm_softc *sc = device_get_softc(dev); + + if (sc->port_res) { + bus_deactivate_resource(dev, SYS_RES_IOPORT, + sc->port_rid, sc->port_res); + bus_release_resource(dev, SYS_RES_IOPORT, + sc->port_rid, sc->port_res); + sc->port_res = 0; + } + if (sc->mem_res) { + bus_deactivate_resource(dev, SYS_RES_MEMORY, + sc->mem_rid, sc->mem_res); + bus_release_resource(dev, SYS_RES_MEMORY, + sc->mem_rid, sc->mem_res); + sc->mem_res = 0; + } + if (sc->irq_res) { + bus_deactivate_resource(dev, SYS_RES_IRQ, + sc->irq_rid, sc->irq_res); + bus_release_resource(dev, SYS_RES_IRQ, + sc->irq_rid, sc->irq_res); + sc->irq_res = 0; + } +} + +int +cm_attach(sc, unit) + struct cm_softc *sc; + int unit; +{ + struct ifnet *ifp = &sc->sc_arccom.ac_if; + int s; + u_int8_t linkaddress; + + s = splhigh(); + + /* + * read the arcnet address from the board + */ + + GETREG(CMRESET); + do { + DELAY(200); + } while (!(GETREG(CMSTAT) & CM_POR)); + + linkaddress = GETMEM(CMMACOFF); + + /* clear the int mask... */ + + sc->sc_intmask = 0; + PUTREG(CMSTAT, 0); + + PUTREG(CMCMD, CM_CONF(CONF_LONG)); + PUTREG(CMCMD, CM_CLR(CLR_POR|CLR_RECONFIG)); + sc->sc_recontime = sc->sc_reconcount = 0; + + /* and reenable kernel int level */ + splx(s); + + /* + * set interface to stopped condition (reset) + */ + cm_stop(sc); + + if (!ifp->if_name) { + ifp->if_softc = sc; + ifp->if_unit = unit; + ifp->if_name = "cm"; + ifp->if_output = arc_output; + ifp->if_start = cm_start; + ifp->if_ioctl = cm_ioctl; + ifp->if_watchdog = cm_watchdog; + ifp->if_init = cm_init; + /* XXX IFQ_SET_READY(&ifp->if_snd); */ + ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; + ifp->if_timer = 0; + ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; + + arc_ifattach(ifp, linkaddress); + +#ifdef CMSOFTCOPY + sc->sc_rxcookie = softintr_establish(IPL_SOFTNET, cm_srint, sc); + sc->sc_txcookie = softintr_establish(IPL_SOFTNET, + (void (*) __P((void *)))cm_start, ifp); +#endif + +#if __FreeBSD_version < 500000 + callout_init(&sc->sc_recon_ch); +#else + callout_init(&sc->sc_recon_ch, 0); +#endif + } + + printf("%s%d: link addr 0x%02x(%d)\n", + ifp->if_name, ifp->if_unit, linkaddress, linkaddress); + return 0; +} + +/* + * Initialize device + * + */ +void +cm_init(xsc) + void *xsc; +{ + struct cm_softc *sc = (struct cm_softc *)xsc; + struct ifnet *ifp; + int s; + + ifp = &sc->sc_arccom.ac_if; + + if ((ifp->if_flags & IFF_RUNNING) == 0) { + s = splimp(); + ifp->if_flags |= IFF_RUNNING; + cm_reset(sc); + cm_start(ifp); + splx(s); + } +} + +/* + * Reset the interface... + * + * this assumes that it is called inside a critical section... + * + */ +void +cm_reset(sc) + struct cm_softc *sc; +{ + struct ifnet *ifp; + int linkaddress; + + ifp = &sc->sc_arccom.ac_if; + +#ifdef CM_DEBUG + printf("%s%d: reset\n", ifp->if_name, ifp->if_unit); +#endif + /* stop and restart hardware */ + + GETREG(CMRESET); + do { + DELAY(200); + } while (!(GETREG(CMSTAT) & CM_POR)); + + linkaddress = GETMEM(CMMACOFF); + +#if defined(CM_DEBUG) && (CM_DEBUG > 2) + printf("%s%d: reset: card reset, link addr = 0x%02x (%d)\n", + ifp->if_name, ifp->if_unit, linkaddress, linkaddress); +#endif + + /* tell the routing level about the (possibly changed) link address */ + arc_storelladdr(ifp, linkaddress); + arc_frag_init(ifp); + + /* POR is NMI, but we need it below: */ + sc->sc_intmask = CM_RECON|CM_POR; + PUTREG(CMSTAT, sc->sc_intmask); + PUTREG(CMCMD, CM_CONF(CONF_LONG)); + +#ifdef CM_DEBUG + printf("%s%d: reset: chip configured, status=0x%02x\n", + ifp->if_name, ifp->if_unit, GETREG(CMSTAT)); +#endif + PUTREG(CMCMD, CM_CLR(CLR_POR|CLR_RECONFIG)); + +#ifdef CM_DEBUG + printf("%s%d: reset: bits cleared, status=0x%02x\n", + ifp->if_name, ifp->if_unit, GETREG(CMSTAT)); +#endif + + sc->sc_reconcount_excessive = ARC_EXCESSIVE_RECONS; + + /* start receiver */ + + sc->sc_intmask |= CM_RI; + sc->sc_rx_fillcount = 0; + sc->sc_rx_act = 2; + + PUTREG(CMCMD, CM_RXBC(2)); + PUTREG(CMSTAT, sc->sc_intmask); + +#ifdef CM_DEBUG + printf("%s%d: reset: started receiver, status=0x%02x\n", + ifp->if_name, ifp->if_unit, GETREG(CMSTAT)); +#endif + + /* and init transmitter status */ + sc->sc_tx_act = 0; + sc->sc_tx_fillcount = 0; + + ifp->if_flags |= IFF_RUNNING; + ifp->if_flags &= ~IFF_OACTIVE; + + cm_start(ifp); +} + +/* + * Take interface offline + */ +void +cm_stop(sc) + struct cm_softc *sc; +{ + /* Stop the interrupts */ + PUTREG(CMSTAT, 0); + + /* Stop the interface */ + GETREG(CMRESET); + + /* Stop watchdog timer */ + sc->sc_arccom.ac_if.if_timer = 0; +} + +/* + * Start output on interface. Get another datagram to send + * off the interface queue, and copy it to the + * interface becore starting the output + * + * this assumes that it is called inside a critical section... + * XXX hm... does it still? + * + */ +void +cm_start(ifp) + struct ifnet *ifp; +{ + struct cm_softc *sc = ifp->if_softc; + struct mbuf *m,*mp; + + int cm_ram_ptr; + int len, tlen, offset, s, buffer; +#ifdef CMTIMINGS + u_long copystart, lencopy, perbyte; +#endif + +#if defined(CM_DEBUG) && (CM_DEBUG > 3) + printf("%s%d: start(%p)\n", ifp->if_name, ifp->if_unit, ifp); +#endif + + if ((ifp->if_flags & IFF_RUNNING) == 0) + return; + + s = splimp(); + + if (sc->sc_tx_fillcount >= 2) { + splx(s); + return; + } + + m = arc_frag_next(ifp); + buffer = sc->sc_tx_act ^ 1; + + splx(s); + + if (m == 0) + return; + + /* + * If bpf is listening on this interface, let it + * see the packet before we commit it to the wire + * + * (can't give the copy in A2060 card RAM to bpf, because + * that RAM is just accessed as on every other byte) + */ + if (ifp->if_bpf) + bpf_mtap(ifp, m); + +#ifdef CM_DEBUG + if (m->m_len < ARC_HDRLEN) + m = m_pullup(m, ARC_HDRLEN);/* gcc does structure padding */ + printf("%s%d: start: filling %d from %d to %d type %d\n", + ifp->if_name, ifp->if_unit, buffer, mtod(m, u_char *)[0], + mtod(m, u_char *)[1], mtod(m, u_char *)[2]); +#else + if (m->m_len < 2) + m = m_pullup(m, 2); +#endif + cm_ram_ptr = buffer*512; + + if (m == 0) + return; + + /* write the addresses to RAM and throw them away */ + + /* + * Hardware does this: Yet Another Microsecond Saved. + * (btw, timing code says usually 2 microseconds) + * PUTMEM(cm_ram_ptr + 0, mtod(m, u_char *)[0]); + */ + + PUTMEM(cm_ram_ptr + 1, mtod(m, u_char *)[1]); + m_adj(m, 2); + + /* get total length left at this point */ + tlen = m->m_pkthdr.len; + if (tlen < ARC_MIN_FORBID_LEN) { + offset = 256 - tlen; + PUTMEM(cm_ram_ptr + 2, offset); + } else { + PUTMEM(cm_ram_ptr + 2, 0); + if (tlen <= ARC_MAX_FORBID_LEN) + offset = 255; /* !!! */ + else { + if (tlen > ARC_MAX_LEN) + tlen = ARC_MAX_LEN; + offset = 512 - tlen; + } + PUTMEM(cm_ram_ptr + 3, offset); + + } + cm_ram_ptr += offset; + + /* lets loop through the mbuf chain */ + + for (mp = m; mp; mp = mp->m_next) { + if ((len = mp->m_len)) { /* YAMS */ + bus_space_write_region_1( + rman_get_bustag(sc->mem_res), + rman_get_bushandle(sc->mem_res), + cm_ram_ptr, mtod(mp, caddr_t), len); + + cm_ram_ptr += len; + } + } + + sc->sc_broadcast[buffer] = (m->m_flags & M_BCAST) != 0; + sc->sc_retransmits[buffer] = (m->m_flags & M_BCAST) ? 1 : 5; + + /* actually transmit the packet */ + s = splimp(); + + if (++sc->sc_tx_fillcount > 1) { + /* + * We are filled up to the rim. No more bufs for the moment, + * please. + */ + ifp->if_flags |= IFF_OACTIVE; + } else { +#ifdef CM_DEBUG + printf("%s%d: start: starting transmitter on buffer %d\n", + ifp->if_name, ifp->if_unit, buffer); +#endif + /* Transmitter was off, start it */ + sc->sc_tx_act = buffer; + + /* + * We still can accept another buf, so don't: + * ifp->if_flags |= IFF_OACTIVE; + */ + sc->sc_intmask |= CM_TA; + PUTREG(CMCMD, CM_TX(buffer)); + PUTREG(CMSTAT, sc->sc_intmask); + + sc->sc_arccom.ac_if.if_timer = ARCTIMEOUT; + } + splx(s); + m_freem(m); + + /* + * After 10 times reading the docs, I realized + * that in the case the receiver NAKs the buffer request, + * the hardware retries till shutdown. + * This is integrated now in the code above. + */ + + return; +} + +/* + * Arcnet interface receiver soft interrupt: + * get the stuff out of any filled buffer we find. + */ +void +cm_srint(vsc) + void *vsc; +{ + struct cm_softc *sc = (struct cm_softc *)vsc; + int buffer, len, offset, s, type; + int cm_ram_ptr; + struct mbuf *m; + struct arc_header *ah; + struct ifnet *ifp; + + ifp = &sc->sc_arccom.ac_if; + + s = splimp(); + buffer = sc->sc_rx_act ^ 1; + splx(s); + + /* Allocate header mbuf */ + MGETHDR(m, M_DONTWAIT, MT_DATA); + + if (m == 0) { + /* + * in case s.th. goes wrong with mem, drop it + * to make sure the receiver can be started again + * count it as input error (we dont have any other + * detectable) + */ + ifp->if_ierrors++; + goto cleanup; + } + + m->m_pkthdr.rcvif = ifp; + + /* + * Align so that IP packet will be longword aligned. Here we + * assume that m_data of new packet is longword aligned. + * When implementing PHDS, we might have to change it to 2, + * (2*sizeof(ulong) - CM_HDRNEWLEN)), packet type dependent. + */ + + cm_ram_ptr = buffer*512; + offset = GETMEM(cm_ram_ptr + 2); + if (offset) + len = 256 - offset; + else { + offset = GETMEM(cm_ram_ptr + 3); + len = 512 - offset; + } + + /* + * first +2 bytes for align fixup below + * second +2 bytes are for src/dst addresses + */ + if ((len + 2 + 2) > MHLEN) { + /* attach an mbuf cluster */ + MCLGET(m, M_DONTWAIT); + + /* Insist on getting a cluster */ + if ((m->m_flags & M_EXT) == 0) { + ifp->if_ierrors++; + goto cleanup; + } + } + + if (m == 0) { + ifp->if_ierrors++; + goto cleanup; + } + + type = GETMEM(cm_ram_ptr + offset); + m->m_data += 1 + arc_isphds(type); + /* mbuf filled with ARCnet addresses */ + m->m_pkthdr.len = m->m_len = len + 2; + + ah = mtod(m, struct arc_header *); + ah->arc_shost = GETMEM(cm_ram_ptr + 0); + ah->arc_dhost = GETMEM(cm_ram_ptr + 1); + + bus_space_read_region_1( + rman_get_bustag(sc->mem_res), rman_get_bushandle(sc->mem_res), + cm_ram_ptr + offset, mtod(m, u_char *) + 2, len); + + arc_input(ifp, m); + + m = NULL; + ifp->if_ipackets++; + +cleanup: + + if (m != NULL) + m_freem(m); + + /* mark buffer as invalid by source id 0 */ + PUTMEM(buffer << 9, 0); + s = splimp(); + + if (--sc->sc_rx_fillcount == 2 - 1) { + + /* was off, restart it on buffer just emptied */ + sc->sc_rx_act = buffer; + sc->sc_intmask |= CM_RI; + + /* this also clears the RI flag interupt: */ + PUTREG(CMCMD, CM_RXBC(buffer)); + PUTREG(CMSTAT, sc->sc_intmask); + +#ifdef CM_DEBUG + printf("%s%d: srint: restarted rx on buf %d\n", + ifp->if_name, ifp->if_unit, buffer); +#endif + } + splx(s); +} + +__inline static void +cm_tint(sc, isr) + struct cm_softc *sc; + int isr; +{ + struct ifnet *ifp; + + int buffer; +#ifdef CMTIMINGS + int clknow; +#endif + + ifp = &(sc->sc_arccom.ac_if); + buffer = sc->sc_tx_act; + + /* + * retransmit code: + * Normal situtations first for fast path: + * If acknowledgement received ok or broadcast, we're ok. + * else if + */ + + if (isr & CM_TMA || sc->sc_broadcast[buffer]) + sc->sc_arccom.ac_if.if_opackets++; +#ifdef CMRETRANSMIT + else if (ifp->if_flags & IFF_LINK2 && ifp->if_timer > 0 + && --sc->sc_retransmits[buffer] > 0) { + /* retransmit same buffer */ + PUTREG(CMCMD, CM_TX(buffer)); + return; + } +#endif + else + ifp->if_oerrors++; + + + /* We know we can accept another buffer at this point. */ + ifp->if_flags &= ~IFF_OACTIVE; + + if (--sc->sc_tx_fillcount > 0) { + + /* + * start tx on other buffer. + * This also clears the int flag + */ + buffer ^= 1; + sc->sc_tx_act = buffer; + + /* + * already given: + * sc->sc_intmask |= CM_TA; + * PUTREG(CMSTAT, sc->sc_intmask); + */ + PUTREG(CMCMD, CM_TX(buffer)); + /* init watchdog timer */ + ifp->if_timer = ARCTIMEOUT; + +#if defined(CM_DEBUG) && (CM_DEBUG > 1) + printf("%s%d: tint: starting tx on buffer %d, status 0x%02x\n", + ifp->if_name, ifp->if_unit, buffer, GETREG(CMSTAT)); +#endif + } else { + /* have to disable TX interrupt */ + sc->sc_intmask &= ~CM_TA; + PUTREG(CMSTAT, sc->sc_intmask); + /* ... and watchdog timer */ + ifp->if_timer = 0; + +#ifdef CM_DEBUG + printf("%s%d: tint: no more buffers to send, status 0x%02x\n", + ifp->if_name, ifp->if_unit, GETREG(CMSTAT)); +#endif + } + + /* XXXX TODO */ +#ifdef CMSOFTCOPY + /* schedule soft int to fill a new buffer for us */ + softintr_schedule(sc->sc_txcookie); +#else + /* call it directly */ + cm_start(ifp); +#endif +} + +/* + * Our interrupt routine + */ +void +cmintr(arg) + void *arg; +{ + struct cm_softc *sc = arg; + struct ifnet *ifp = &sc->sc_arccom.ac_if; + + u_char isr, maskedisr; + int buffer; + u_long newsec; + + isr = GETREG(CMSTAT); + maskedisr = isr & sc->sc_intmask; + if (!maskedisr) + return; + do { + +#if defined(CM_DEBUG) && (CM_DEBUG>1) + printf("%s%d: intr: status 0x%02x, intmask 0x%02x\n", + ifp->if_name, ifp->if_unit, isr, sc->sc_intmask); +#endif + + if (maskedisr & CM_POR) { + /* + * XXX We should never see this. Don't bother to store + * the address. + * sc->sc_arccom.ac_anaddr = GETMEM(CMMACOFF); + */ + PUTREG(CMCMD, CM_CLR(CLR_POR)); + log(LOG_WARNING, + "%s%d: intr: got spurious power on reset int\n", + ifp->if_name, ifp->if_unit); + } + + if (maskedisr & CM_RECON) { + /* + * we dont need to: + * PUTREG(CMCMD, CM_CONF(CONF_LONG)); + */ + PUTREG(CMCMD, CM_CLR(CLR_RECONFIG)); + sc->sc_arccom.ac_if.if_collisions++; + + /* + * If less than 2 seconds per reconfig: + * If ARC_EXCESSIVE_RECONFIGS + * since last burst, complain and set treshold for + * warnings to ARC_EXCESSIVE_RECONS_REWARN. + * + * This allows for, e.g., new stations on the cable, or + * cable switching as long as it is over after + * (normally) 16 seconds. + * + * XXX TODO: check timeout bits in status word and + * double time if necessary. + */ + + callout_stop(&sc->sc_recon_ch); + newsec = time_second; + if ((newsec - sc->sc_recontime <= 2) && + (++sc->sc_reconcount == ARC_EXCESSIVE_RECONS)) { + log(LOG_WARNING, + "%s%d: excessive token losses, " + "cable problem?\n", + ifp->if_name, ifp->if_unit); + } + sc->sc_recontime = newsec; + callout_reset(&sc->sc_recon_ch, 15 * hz, + cm_reconwatch, (void *)sc); + } + + if (maskedisr & CM_RI) { +#if defined(CM_DEBUG) && (CM_DEBUG > 1) + printf("%s%d: intr: hard rint, act %d\n", + ifp->if_name, ifp->if_unit, sc->sc_rx_act); +#endif + + buffer = sc->sc_rx_act; + /* look if buffer is marked invalid: */ + if (GETMEM(buffer*512) == 0) { + /* + * invalid marked buffer (or illegally + * configured sender) + */ + log(LOG_WARNING, + "%s%d: spurious RX interupt or sender 0 " + " (ignored)\n", ifp->if_name, ifp->if_unit); + /* + * restart receiver on same buffer. + * XXX maybe better reset interface? + */ + PUTREG(CMCMD, CM_RXBC(buffer)); + } else { + if (++sc->sc_rx_fillcount > 1) { + sc->sc_intmask &= ~CM_RI; + PUTREG(CMSTAT, sc->sc_intmask); + } else { + buffer ^= 1; + sc->sc_rx_act = buffer; + + /* + * Start receiver on other receive + * buffer. This also clears the RI + * interupt flag. + */ + PUTREG(CMCMD, CM_RXBC(buffer)); + /* in RX intr, so mask is ok for RX */ + +#ifdef CM_DEBUG + printf("%s%d: strt rx for buf %d, " + "stat 0x%02x\n", + ifp->if_name, ifp->if_unit, + sc->sc_rx_act, GETREG(CMSTAT)); +#endif + } + +#ifdef CMSOFTCOPY + /* + * this one starts a soft int to copy out + * of the hw + */ + softintr_schedule(sc->sc_rxcookie); +#else + /* this one does the copy here */ + cm_srint(sc); +#endif + } + } + if (maskedisr & CM_TA) { + cm_tint(sc, isr); + } + isr = GETREG(CMSTAT); + maskedisr = isr & sc->sc_intmask; + } while (maskedisr); +#if defined(CM_DEBUG) && (CM_DEBUG>1) + printf("%s%d: intr (exit): status 0x%02x, intmask 0x%02x\n", + ifp->if_name, ifp->if_unit, isr, sc->sc_intmask); +#endif +} + +void +cm_reconwatch(arg) + void *arg; +{ + struct cm_softc *sc = arg; + struct ifnet *ifp = &sc->sc_arccom.ac_if; + + if (sc->sc_reconcount >= ARC_EXCESSIVE_RECONS) { + sc->sc_reconcount = 0; + log(LOG_WARNING, "%s%d: token valid again.\n", + ifp->if_name, ifp->if_unit); + } + sc->sc_reconcount = 0; +} + + +/* + * Process an ioctl request. + * This code needs some work - it looks pretty ugly. + */ +int +cm_ioctl(ifp, command, data) + struct ifnet *ifp; + u_long command; + caddr_t data; +{ + struct cm_softc *sc; + struct ifaddr *ifa; + struct ifreq *ifr; + int s, error; + + error = 0; + sc = ifp->if_softc; + ifa = (struct ifaddr *)data; + ifr = (struct ifreq *)data; + s = splimp(); + +#if defined(CM_DEBUG) && (CM_DEBUG > 2) + printf("%s%d: ioctl() called, cmd = 0x%lx\n", + ifp->if_name, ifp->if_unit, command); +#endif + + switch (command) { + case SIOCSIFADDR: + case SIOCADDMULTI: + case SIOCDELMULTI: + case SIOCSIFMTU: + error = arc_ioctl(ifp, command, data); + 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. + */ + cm_stop(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. + */ + cm_init(sc); + } + break; + + default: + error = EINVAL; + break; + } + + splx(s); + return (error); +} + +/* + * watchdog routine for transmitter. + * + * We need this, because else a receiver whose hardware is alive, but whose + * software has not enabled the Receiver, would make our hardware wait forever + * Discovered this after 20 times reading the docs. + * + * Only thing we do is disable transmitter. We'll get an transmit timeout, + * and the int handler will have to decide not to retransmit (in case + * retransmission is implemented). + * + * This one assumes being called inside splimp() + */ + +void +cm_watchdog(ifp) + struct ifnet *ifp; +{ + struct cm_softc *sc = ifp->if_softc; + + PUTREG(CMCMD, CM_TXDIS); + return; +} |