1080 lines
27 KiB
C
1080 lines
27 KiB
C
/*
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* Copyright (c) 1993 Herb Peyerl <hpeyerl@novatel.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: if_ep.c,v 1.32 1994/04/18 12:40:39 deraadt Exp $
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*/
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#include "bpfilter.h"
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#include <sys/param.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/errno.h>
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#include <sys/syslog.h>
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#include <sys/select.h>
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#include <sys/device.h>
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#include <net/if.h>
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#include <net/netisr.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/netisr.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/if_ether.h>
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#endif
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#ifdef NS
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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#endif
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#if NBPFILTER > 0
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#include <net/bpf.h>
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#include <net/bpfdesc.h>
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#endif
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#include <machine/cpu.h>
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#include <machine/pio.h>
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#include <i386/isa/isavar.h>
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#include <i386/isa/if_epreg.h>
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#include <i386/isa/elink.h>
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#define ETHER_MIN_LEN 64
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#define ETHER_MAX_LEN 1518
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#define ETHER_ADDR_LEN 6
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/*
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* Ethernet software status per interface.
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*/
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struct ep_softc {
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struct device sc_dev;
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struct intrhand sc_ih;
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struct arpcom ep_ac; /* Ethernet common part */
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short ep_iobase; /* i/o bus address */
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char ep_connectors; /* Connectors on this card. */
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#define MAX_MBS 8 /* # of mbufs we keep around */
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struct mbuf *mb[MAX_MBS]; /* spare mbuf storage. */
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int next_mb; /* Which mbuf to use next. */
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int last_mb; /* Last mbuf. */
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int tx_start_thresh; /* Current TX_start_thresh. */
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caddr_t bpf; /* BPF "magic cookie" */
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char bus32bit; /* 32bit access possible */
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};
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static int epprobe();
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static void epattach();
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struct cfdriver epcd = {
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NULL, "ep", epprobe, epattach, DV_IFNET, sizeof(struct ep_softc)
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};
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int epintr __P((struct ep_softc *));
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static void epinit __P((struct ep_softc *));
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static int epioctl __P((struct ifnet *, int, caddr_t));
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static int epstart __P((struct ifnet *));
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static int epwatchdog __P((int));
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static void epreset __P((struct ep_softc *));
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static void epread __P((struct ep_softc *));
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static void epmbuffill __P((struct ep_softc *));
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static void epmbufempty __P((struct ep_softc *));
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static void epstop __P((struct ep_softc *));
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static void epsetfilter __P((struct ep_softc *sc));
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static void epsetlink __P((struct ep_softc *sc));
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static u_short epreadeeprom __P((int id_port, int offset));
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static int epbusyeeprom __P((struct ep_softc *));
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#define MAXEPCARDS 20 /* if you have 21 cards in your machine... you lose */
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static struct epcard {
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u_short port;
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u_short irq;
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char available;
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char bus32bit;
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} epcards[MAXEPCARDS];
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static int nepcards;
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static void
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epaddcard(p, i, mode)
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short p;
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u_short i;
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char mode;
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{
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if (nepcards >= sizeof(epcards)/sizeof(epcards[0]))
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return;
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epcards[nepcards].port = p;
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epcards[nepcards].irq = 1 << ((i == 2) ? 9 : i);
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epcards[nepcards].available = 1;
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epcards[nepcards].bus32bit = mode;
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nepcards++;
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}
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/*
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* 3c579 cards on the EISA bus are probed by their slot number. 3c509
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* cards on the ISA bus are probed in ethernet address order. The probe
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* sequence requires careful orchestration, and we'd like like to allow
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* the irq and base address to be wildcarded. So, we probe all the cards
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* the first time epprobe() is called. On subsequent calls we look for
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* matching cards.
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*/
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int
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epprobe(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct ep_softc *sc = (void *)self;
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struct isa_attach_args *ia = aux;
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static int firsttime;
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int slot, port, i;
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u_short k, k2;
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if (firsttime==0) {
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firsttime = 1;
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/* find all EISA cards */
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for (slot = 1; slot < 8; slot++) {
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port = 0x1000 * slot;
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outw(port + EP_COMMAND, GLOBAL_RESET);
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delay(1000);
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if (inw(port + EP_W0_MFG_ID) != MFG_ID)
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continue;
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k = inw(port + EP_W0_PRODUCT_ID);
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if ((k & 0xf0ff) != (PROD_ID & 0xf0ff))
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continue;
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k = inw(port + EP_W0_ADDRESS_CFG);
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k = (k & 0x1f) * 0x10 + 0x200;
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k2 = inw(port + EP_W0_RESOURCE_CFG);
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k2 >>= 12;
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epaddcard(port, k2, 0);
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}
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/* find all isa cards */
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outw(BASE + EP_COMMAND, GLOBAL_RESET);
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delay(1000);
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elink_reset(); /* global reset to ELINK_ID_PORT */
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delay(1000);
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for (slot = 0; slot < 10; slot++) {
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outb(ELINK_ID_PORT, 0x00);
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elink_idseq(ELINK_509_POLY);
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delay(1000);
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k = epreadeeprom(ELINK_ID_PORT, EEPROM_MFG_ID);
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if (k == 0xff)
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continue; /* no more isa cards */
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if (k != MFG_ID)
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continue;
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k = epreadeeprom(ELINK_ID_PORT, EEPROM_PROD_ID);
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if ((k & 0xf0ff) != (PROD_ID & 0xf0ff))
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continue;
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k = epreadeeprom(ELINK_ID_PORT, EEPROM_ADDR_CFG);
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k = (k & 0x1f) * 0x10 + 0x200;
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k2 = epreadeeprom(ELINK_ID_PORT, EEPROM_RESOURCE_CFG);
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k2 >>= 12;
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epaddcard(k, k2, 0);
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/* so card will not respond to contention again */
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outb(ELINK_ID_PORT, TAG_ADAPTER_0 + 1);
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/*
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* XXX: this should probably not be done here
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* because it enables the drq/irq lines from
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* the board. Perhaps it should be done after
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* we have checked for irq/drq collisions?
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*/
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outb(ELINK_ID_PORT, ACTIVATE_ADAPTER_TO_CONFIG);
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}
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/* XXX should we sort by ethernet address? */
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}
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/*
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* a very specific search order:
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* exact port & irq
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* exact port, wildcard irq
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* wildcard port, exact irq
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* wildcard port & irq
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* else fail..
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*/
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if (ia->ia_iobase != (u_short)-1 && ia->ia_irq != (u_short)-1) {
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for (i = 0; i<nepcards; i++) {
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if (epcards[i].available == 0)
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continue;
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if (ia->ia_iobase == epcards[i].port &&
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ia->ia_irq == epcards[i].irq)
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goto good;
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}
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}
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if (ia->ia_iobase != (u_short)-1 && ia->ia_irq == (u_short)-1) {
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for (i = 0; i<nepcards; i++) {
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if (epcards[i].available == 0)
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continue;
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if (ia->ia_iobase == epcards[i].port)
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goto good;
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}
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}
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if (ia->ia_iobase == (u_short)-1 && ia->ia_irq != (u_short)-1) {
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for (i = 0; i<nepcards; i++) {
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if (epcards[i].available == 0)
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continue;
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if (ia->ia_irq == epcards[i].irq)
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goto good;
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}
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}
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for (i = 0; i<nepcards; i++)
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if (epcards[i].available != 0) {
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goto good;
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}
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return 0;
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good:
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epcards[i].available = 0;
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sc->bus32bit = epcards[i].bus32bit;
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ia->ia_iobase = epcards[i].port;
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ia->ia_irq = epcards[i].irq;
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ia->ia_iosize = 0x10;
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ia->ia_msize = 0;
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return 1;
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}
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static void
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epattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct ep_softc *sc = (void *)self;
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struct isa_attach_args *ia = aux;
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struct ifnet *ifp = &sc->ep_ac.ac_if;
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struct ifaddr *ifa;
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struct sockaddr_dl *sdl;
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u_short i;
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printf(": ");
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sc->ep_iobase = ia->ia_iobase;
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sc->ep_connectors = 0;
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i = inw(ia->ia_iobase + EP_W0_CONFIG_CTRL);
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if (i & IS_AUI) {
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printf("aui");
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sc->ep_connectors |= AUI;
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}
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if (i & IS_BNC) {
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if (sc->ep_connectors)
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printf("/");
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printf("bnc");
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sc->ep_connectors |= BNC;
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}
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if (i & IS_UTP) {
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if (sc->ep_connectors)
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printf("/");
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printf("utp");
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sc->ep_connectors |= UTP;
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}
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if (!sc->ep_connectors)
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printf("no connectors!");
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/*
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* Read the station address from the eeprom
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*/
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for (i = 0; i < 3; i++) {
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u_short *p;
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GO_WINDOW(0);
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if (epbusyeeprom(sc))
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return;
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outw(BASE + EP_W0_EEPROM_COMMAND, READ_EEPROM | i);
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if (epbusyeeprom(sc))
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return;
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p = (u_short *) & sc->ep_ac.ac_enaddr[i * 2];
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*p = htons(inw(BASE + EP_W0_EEPROM_DATA));
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GO_WINDOW(2);
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outw(BASE + EP_W2_ADDR_0 + (i * 2), ntohs(*p));
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}
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printf(" address %s\n", ether_sprintf(sc->ep_ac.ac_enaddr));
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ifp->if_unit = sc->sc_dev.dv_unit;
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ifp->if_name = epcd.cd_name;
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ifp->if_mtu = ETHERMTU;
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ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS |
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IFF_MULTICAST;
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ifp->if_output = ether_output;
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ifp->if_start = epstart;
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ifp->if_ioctl = epioctl;
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ifp->if_watchdog = epwatchdog;
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if_attach(ifp);
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/*
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* Search down the ifa address list looking for the AF_LINK type entry
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* and initialize it.
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*/
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ifa = ifp->if_addrlist;
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while (ifa && ifa->ifa_addr) {
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if (ifa->ifa_addr->sa_family == AF_LINK) {
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/*
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* Fill in the link-level address for this interface.
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*/
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sdl = (struct sockaddr_dl *) ifa->ifa_addr;
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sdl->sdl_type = IFT_ETHER;
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sdl->sdl_alen = ETHER_ADDR_LEN;
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sdl->sdl_slen = 0;
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bcopy(sc->ep_ac.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN);
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break;
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} else
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ifa = ifa->ifa_next;
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}
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#if NBPFILTER > 0
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bpfattach(&sc->bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
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#endif
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sc->sc_ih.ih_fun = epintr;
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sc->sc_ih.ih_arg = sc;
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sc->sc_ih.ih_level = IPL_NET;
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intr_establish(ia->ia_irq, &sc->sc_ih);
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}
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/*
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* The order in here seems important. Otherwise we may not receive
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* interrupts. ?!
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*/
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static void
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epinit(sc)
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register struct ep_softc *sc;
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{
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register struct ifnet *ifp = &sc->ep_ac.ac_if;
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int s, i;
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if (ifp->if_addrlist == 0)
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return;
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s = splimp();
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while (inb(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS)
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;
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GO_WINDOW(0);
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outw(BASE + EP_W0_CONFIG_CTRL, 0); /* Disable the card */
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outw(BASE + EP_W0_CONFIG_CTRL, ENABLE_DRQ_IRQ); /* Enable the card */
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GO_WINDOW(2);
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for (i = 0; i < 6; i++) /* Reload the ether_addr. */
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outb(BASE + EP_W2_ADDR_0 + i, sc->ep_ac.ac_enaddr[i]);
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outw(BASE + EP_COMMAND, RX_RESET);
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outw(BASE + EP_COMMAND, TX_RESET);
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GO_WINDOW(1); /* Window 1 is operating window */
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for (i = 0; i < 31; i++)
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inb(BASE + EP_W1_TX_STATUS);
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/*
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* attemp to get rid of stray interrupts. on the i386 this isn't
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* totally possible since they may queue.
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*/
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outw(BASE + EP_COMMAND, ACK_INTR | 0xff);
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outw(BASE + EP_COMMAND, SET_RD_0_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
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S_TX_COMPLETE | S_TX_AVAIL);
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outw(BASE + EP_COMMAND, SET_INTR_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
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S_TX_COMPLETE | S_TX_AVAIL);
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epsetfilter(sc);
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epsetlink(sc);
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outw(BASE + EP_COMMAND, RX_ENABLE);
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outw(BASE + EP_COMMAND, TX_ENABLE);
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ifp->if_flags |= IFF_RUNNING;
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ifp->if_flags &= ~IFF_OACTIVE; /* just in case */
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sc->tx_start_thresh = 20; /* probably a good starting point. */
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/* Store up a bunch of mbuf's for use later. (MAX_MBS). */
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epmbuffill(sc);
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epstart(ifp);
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splx(s);
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}
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static void
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epsetfilter(sc)
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register struct ep_softc *sc;
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{
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register struct ifnet *ifp = &sc->ep_ac.ac_if;
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GO_WINDOW(1); /* Window 1 is operating window */
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outw(BASE + EP_COMMAND, SET_RX_FILTER |
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FIL_INDIVIDUAL | FIL_BRDCST |
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((ifp->if_flags & IFF_MULTICAST) ? FIL_MULTICAST : 0 ) |
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((ifp->if_flags & IFF_PROMISC) ? FIL_PROMISC : 0 ));
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}
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static void
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epsetlink(sc)
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register struct ep_softc *sc;
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{
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register struct ifnet *ifp = &sc->ep_ac.ac_if;
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/*
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* you can `ifconfig (link0|-link0) ep0' to get the following
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* behaviour:
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* -link0 disable AUI/UTP. enable BNC.
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* link0 disable BNC. enable AUI.
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* link1 if the card has a UTP connector, and link0 is
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* set too, then you get the UTP port.
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*/
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GO_WINDOW(4);
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outw(BASE + EP_W4_MEDIA_TYPE, DISABLE_UTP);
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GO_WINDOW(1);
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if (!(ifp->if_flags & IFF_LINK0) && (sc->ep_connectors & BNC)) {
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outw(BASE + EP_COMMAND, START_TRANSCEIVER);
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delay(1000);
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}
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if (ifp->if_flags & IFF_LINK0) {
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outw(BASE + EP_COMMAND, STOP_TRANSCEIVER);
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delay(1000);
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if((ifp->if_flags & IFF_LINK1) && (sc->ep_connectors & UTP)) {
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GO_WINDOW(4);
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outw(BASE + EP_W4_MEDIA_TYPE, ENABLE_UTP);
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GO_WINDOW(1);
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}
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}
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}
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static const char padmap[] = {0, 3, 2, 1};
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static int
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epstart(ifp)
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struct ifnet *ifp;
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{
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register struct ep_softc *sc = epcd.cd_devs[ifp->if_unit];
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struct mbuf *m, *top;
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int s, len, pad;
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s = splimp();
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if (sc->ep_ac.ac_if.if_flags & IFF_OACTIVE) {
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splx(s);
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return (0);
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}
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startagain:
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/* Sneak a peek at the next packet */
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m = sc->ep_ac.ac_if.if_snd.ifq_head;
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if (m == 0) {
|
|
splx(s);
|
|
return (0);
|
|
}
|
|
#if 0
|
|
len = m->m_pkthdr.len;
|
|
#else
|
|
for (len = 0, top = m; m; m = m->m_next)
|
|
len += m->m_len;
|
|
#endif
|
|
|
|
pad = padmap[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 */
|
|
+sc->ep_ac.ac_if.if_oerrors;
|
|
IF_DEQUEUE(&sc->ep_ac.ac_if.if_snd, m);
|
|
m_freem(m);
|
|
goto readcheck;
|
|
}
|
|
|
|
if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) {
|
|
/* no room in FIFO */
|
|
outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4));
|
|
sc->ep_ac.ac_if.if_flags |= IFF_OACTIVE;
|
|
splx(s);
|
|
return (0);
|
|
}
|
|
IF_DEQUEUE(&sc->ep_ac.ac_if.if_snd, m);
|
|
if (m == 0) { /* not really needed */
|
|
splx(s);
|
|
return (0);
|
|
}
|
|
outw(BASE + EP_COMMAND, SET_TX_START_THRESH |
|
|
(len / 4 + sc->tx_start_thresh));
|
|
|
|
outw(BASE + EP_W1_TX_PIO_WR_1, len);
|
|
outw(BASE + EP_W1_TX_PIO_WR_1, 0xffff); /* Second dword meaningless */
|
|
|
|
for (top = m; m != 0; m = m->m_next) {
|
|
if (sc->bus32bit) {
|
|
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/4,
|
|
m->m_len & 3);
|
|
} else {
|
|
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));
|
|
}
|
|
}
|
|
while (pad--)
|
|
outb(BASE + EP_W1_TX_PIO_WR_1, 0); /* Padding */
|
|
|
|
#if NBPFILTER > 0
|
|
if (sc->bpf) {
|
|
u_short etype;
|
|
int off, datasize, resid;
|
|
struct ether_header *eh;
|
|
struct trailer_header {
|
|
u_short ether_type;
|
|
u_short ether_residual;
|
|
} trailer_header;
|
|
char ether_packet[ETHER_MAX_LEN];
|
|
char *ep;
|
|
|
|
ep = ether_packet;
|
|
|
|
/*
|
|
* We handle trailers below:
|
|
* Copy ether header first, then residual data,
|
|
* then data. Put all this in a temporary buffer
|
|
* 'ether_packet' and send off to bpf. Since the
|
|
* system has generated this packet, we assume
|
|
* that all of the offsets in the packet are
|
|
* correct; if they're not, the system will almost
|
|
* certainly crash in m_copydata.
|
|
* We make no assumptions about how the data is
|
|
* arranged in the mbuf chain (i.e. how much
|
|
* data is in each mbuf, if mbuf clusters are
|
|
* used, etc.), which is why we use m_copydata
|
|
* to get the ether header rather than assume
|
|
* that this is located in the first mbuf.
|
|
*/
|
|
/* copy ether header */
|
|
m_copydata(top, 0, sizeof(struct ether_header), ep);
|
|
eh = (struct ether_header *) ep;
|
|
ep += sizeof(struct ether_header);
|
|
etype = ntohs(eh->ether_type);
|
|
if (etype >= ETHERTYPE_TRAIL &&
|
|
etype < ETHERTYPE_TRAIL + ETHERTYPE_NTRAILER) {
|
|
datasize = ((etype - ETHERTYPE_TRAIL) << 9);
|
|
off = datasize + sizeof(struct ether_header);
|
|
|
|
/* copy trailer_header into a data structure */
|
|
m_copydata(top, off, sizeof(struct trailer_header),
|
|
&trailer_header.ether_type);
|
|
|
|
/* copy residual data */
|
|
resid = trailer_header.ether_residual -
|
|
sizeof(struct trailer_header);
|
|
resid = ntohs(resid);
|
|
m_copydata(top, off + sizeof(struct trailer_header),
|
|
resid, ep);
|
|
ep += resid;
|
|
|
|
/* copy data */
|
|
m_copydata(top, sizeof(struct ether_header),
|
|
datasize, ep);
|
|
ep += datasize;
|
|
|
|
/* restore original ether packet type */
|
|
eh->ether_type = trailer_header.ether_type;
|
|
|
|
bpf_tap(sc->bpf, ether_packet, ep - ether_packet);
|
|
} else
|
|
bpf_mtap(sc->bpf, top);
|
|
}
|
|
#endif
|
|
|
|
m_freem(top);
|
|
++sc->ep_ac.ac_if.if_opackets;
|
|
|
|
/*
|
|
* Is another packet coming in? We don't want to overflow the
|
|
* tiny RX fifo.
|
|
*/
|
|
readcheck:
|
|
if (inw(BASE + EP_W1_RX_STATUS) & RX_BYTES_MASK) {
|
|
splx(s);
|
|
return (0);
|
|
}
|
|
goto startagain;
|
|
}
|
|
|
|
int
|
|
epintr(sc)
|
|
register struct ep_softc *sc;
|
|
{
|
|
int status, i;
|
|
struct ifnet *ifp = &sc->ep_ac.ac_if;
|
|
|
|
status = 0;
|
|
status = inw(BASE + EP_STATUS) &
|
|
(S_TX_COMPLETE | S_TX_AVAIL | S_RX_COMPLETE | S_CARD_FAILURE);
|
|
if (status == 0) {
|
|
/* No interrupts. */
|
|
outw(BASE + EP_COMMAND, C_INTR_LATCH);
|
|
return (0);
|
|
}
|
|
loop:
|
|
/* important that we do this first. */
|
|
outw(BASE + EP_COMMAND, ACK_INTR | status);
|
|
|
|
if (status & S_RX_COMPLETE) {
|
|
status &= ~S_RX_COMPLETE;
|
|
epread(sc);
|
|
}
|
|
if (status & S_TX_AVAIL) {
|
|
status &= ~S_TX_AVAIL;
|
|
inw(BASE + EP_W1_FREE_TX);
|
|
sc->ep_ac.ac_if.if_flags &= ~IFF_OACTIVE;
|
|
epstart(&sc->ep_ac.ac_if);
|
|
}
|
|
if (status & S_CARD_FAILURE) {
|
|
printf("%s: reset (status: %x)\n", sc->sc_dev.dv_xname, status);
|
|
outw(BASE + EP_COMMAND, C_INTR_LATCH);
|
|
epreset(sc);
|
|
return (1);
|
|
}
|
|
if (status & S_TX_COMPLETE) {
|
|
status &= ~S_TX_COMPLETE;
|
|
/*
|
|
* We need to read 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) {
|
|
outw(BASE + EP_W1_TX_STATUS, 0x0);
|
|
if (i & (TXS_MAX_COLLISION | TXS_JABBER | TXS_UNDERRUN)) {
|
|
if (i & TXS_MAX_COLLISION)
|
|
++sc->ep_ac.ac_if.if_collisions;
|
|
if (i & (TXS_JABBER | TXS_UNDERRUN)) {
|
|
outw(BASE + EP_COMMAND, TX_RESET);
|
|
if (i & TXS_UNDERRUN) {
|
|
if (sc->tx_start_thresh < ETHER_MAX_LEN) {
|
|
sc->tx_start_thresh += 20;
|
|
outw(BASE + EP_COMMAND,
|
|
SET_TX_START_THRESH |
|
|
sc->tx_start_thresh);
|
|
}
|
|
}
|
|
}
|
|
outw(BASE + EP_COMMAND, TX_ENABLE);
|
|
++sc->ep_ac.ac_if.if_oerrors;
|
|
}
|
|
}
|
|
epstart(ifp);
|
|
}
|
|
status = inw(BASE + EP_STATUS) &
|
|
(S_TX_COMPLETE | S_TX_AVAIL | S_RX_COMPLETE | S_CARD_FAILURE);
|
|
if (status == 0) {
|
|
/* No interrupts. */
|
|
outw(BASE + EP_COMMAND, C_INTR_LATCH);
|
|
return (1);
|
|
}
|
|
goto loop;
|
|
}
|
|
|
|
static void
|
|
epread(sc)
|
|
register struct ep_softc *sc;
|
|
{
|
|
struct ether_header *eh;
|
|
struct mbuf *mcur, *m, *m0, *top;
|
|
int totlen, lenthisone;
|
|
int save_totlen, off;
|
|
u_short etype;
|
|
|
|
totlen = inw(BASE + EP_W1_RX_STATUS);
|
|
off = 0;
|
|
top = 0;
|
|
|
|
if (totlen & ERR_RX) {
|
|
++sc->ep_ac.ac_if.if_ierrors;
|
|
goto out;
|
|
}
|
|
save_totlen = totlen &= RX_BYTES_MASK; /* Lower 11 bits = RX bytes. */
|
|
|
|
m = sc->mb[sc->next_mb];
|
|
sc->mb[sc->next_mb] = 0;
|
|
|
|
if (m == 0) {
|
|
MGETHDR(m, M_DONTWAIT, MT_DATA);
|
|
if (m == 0)
|
|
goto out;
|
|
} else { /* 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;
|
|
}
|
|
|
|
top = m0 = m; /* We assign top so we can "goto out" */
|
|
#define EROUND ((sizeof(struct ether_header) + 3) & ~3)
|
|
#define EOFF (EROUND - sizeof(struct ether_header))
|
|
m0->m_data += EOFF;
|
|
/* Read what should be the header. */
|
|
insw(BASE + EP_W1_RX_PIO_RD_1,
|
|
mtod(m0, caddr_t), sizeof(struct ether_header) / 2);
|
|
m->m_len = sizeof(struct ether_header);
|
|
totlen -= sizeof(struct ether_header);
|
|
/*
|
|
* mostly deal with trailer here. (untested)
|
|
* We do this in a couple of parts. First we check for a trailer, if
|
|
* we have one we convert the mbuf back to a regular mbuf and set the offset and
|
|
* subtract sizeof(struct ether_header) from the pktlen.
|
|
* After we've read the packet off the interface (all except for the trailer
|
|
* header, we then get a header mbuf, read the trailer into it, and fix up
|
|
* the mbuf pointer chain.
|
|
*/
|
|
eh = mtod(m, struct ether_header *);
|
|
etype = ntohs((u_short) eh->ether_type);
|
|
if (etype >= ETHERTYPE_TRAIL &&
|
|
etype < ETHERTYPE_TRAIL + ETHERTYPE_NTRAILER) {
|
|
m->m_data = m->m_dat; /* Convert back to regular mbuf. */
|
|
m->m_flags = 0; /* This sucks but non-trailers are the norm */
|
|
off = (etype - ETHERTYPE_TRAIL) * 512;
|
|
if (off >= ETHERMTU) {
|
|
m_freem(m);
|
|
return; /* sanity */
|
|
}
|
|
totlen -= sizeof(struct ether_header); /* We don't read the trailer */
|
|
m->m_data += 2 * sizeof(u_short); /* Get rid of type & len */
|
|
}
|
|
while (totlen > 0) {
|
|
lenthisone = min(totlen, M_TRAILINGSPACE(m));
|
|
if (lenthisone == 0) { /* no room in this one */
|
|
mcur = m;
|
|
m = sc->mb[sc->next_mb];
|
|
sc->mb[sc->next_mb] = 0;
|
|
if (!m) {
|
|
MGET(m, M_DONTWAIT, MT_DATA);
|
|
if (m == 0)
|
|
goto out;
|
|
} else {
|
|
timeout(epmbuffill, sc, 1);
|
|
sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
|
|
}
|
|
if (totlen >= MINCLSIZE)
|
|
MCLGET(m, M_DONTWAIT);
|
|
m->m_len = 0;
|
|
mcur->m_next = m;
|
|
lenthisone = min(totlen, M_TRAILINGSPACE(m));
|
|
}
|
|
if (sc->bus32bit) {
|
|
insl(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len,
|
|
lenthisone / 4);
|
|
m->m_len += (lenthisone & ~3);
|
|
if (lenthisone & 3)
|
|
insb(BASE + EP_W1_RX_PIO_RD_1,
|
|
mtod(m, caddr_t) + m->m_len,
|
|
lenthisone & 3);
|
|
m->m_len += (lenthisone & 3);
|
|
} else {
|
|
insw(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len,
|
|
lenthisone / 2);
|
|
m->m_len += lenthisone;
|
|
if (lenthisone & 1)
|
|
*(mtod(m, caddr_t) + m->m_len - 1) = inb(BASE + EP_W1_RX_PIO_RD_1);
|
|
}
|
|
totlen -= lenthisone;
|
|
}
|
|
if (off) {
|
|
top = sc->mb[sc->next_mb];
|
|
sc->mb[sc->next_mb] = 0;
|
|
if (top == 0) {
|
|
MGETHDR(top, M_DONTWAIT, MT_DATA);
|
|
if (top == 0)
|
|
goto out;
|
|
} else { /* Convert one of our saved mbuf's */
|
|
sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
|
|
top->m_data = top->m_pktdat;
|
|
top->m_flags = M_PKTHDR;
|
|
}
|
|
insw(BASE + EP_W1_RX_PIO_RD_1, mtod(top, caddr_t),
|
|
sizeof(struct ether_header));
|
|
top->m_next = m0;
|
|
top->m_len = sizeof(struct ether_header);
|
|
/* XXX Accomodate for type and len from beginning of trailer */
|
|
top->m_pkthdr.len = save_totlen - (2 * sizeof(u_short));
|
|
} else {
|
|
top = m0;
|
|
top->m_pkthdr.len = save_totlen;
|
|
}
|
|
|
|
top->m_pkthdr.rcvif = &sc->ep_ac.ac_if;
|
|
outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
|
|
while (inb(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS)
|
|
;
|
|
++sc->ep_ac.ac_if.if_ipackets;
|
|
#if NBPFILTER > 0
|
|
if (sc->bpf) {
|
|
bpf_mtap(sc->bpf, top);
|
|
|
|
/*
|
|
* 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 ((sc->ep_ac.ac_if.if_flags & IFF_PROMISC) &&
|
|
(eh->ether_dhost[0] & 1) == 0 &&
|
|
bcmp(eh->ether_dhost, sc->ep_ac.ac_enaddr,
|
|
sizeof(eh->ether_dhost)) != 0 &&
|
|
bcmp(eh->ether_dhost, etherbroadcastaddr,
|
|
sizeof(eh->ether_dhost)) != 0) {
|
|
m_freem(top);
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
m_adj(top, sizeof(struct ether_header));
|
|
ether_input(&sc->ep_ac.ac_if, eh, top);
|
|
return;
|
|
|
|
out: outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
|
|
while (inb(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS)
|
|
;
|
|
if (top)
|
|
m_freem(top);
|
|
}
|
|
|
|
|
|
/*
|
|
* Look familiar?
|
|
*/
|
|
static int
|
|
epioctl(ifp, cmd, data)
|
|
register struct ifnet *ifp;
|
|
int cmd;
|
|
caddr_t data;
|
|
{
|
|
register struct ifaddr *ifa = (struct ifaddr *) data;
|
|
struct ep_softc *sc = epcd.cd_devs[ifp->if_unit];
|
|
struct ifreq *ifr = (struct ifreq *) data;
|
|
int error = 0;
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFADDR:
|
|
ifp->if_flags |= IFF_UP;
|
|
switch (ifa->ifa_addr->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
epinit(sc); /* before arpwhohas */
|
|
((struct arpcom *) ifp)->ac_ipaddr = IA_SIN(ifa)->sin_addr;
|
|
arpwhohas((struct arpcom *) ifp, &IA_SIN(ifa)->sin_addr);
|
|
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->ep_ac.ac_enaddr);
|
|
else {
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
bcopy(ina->x_host.c_host,
|
|
sc->ep_ac.ac_enaddr,
|
|
sizeof(sc->ep_ac.ac_enaddr));
|
|
}
|
|
epinit(sc);
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
epinit(sc);
|
|
break;
|
|
}
|
|
break;
|
|
case SIOCSIFFLAGS:
|
|
if ((ifp->if_flags & IFF_UP) == 0 &&
|
|
(ifp->if_flags & IFF_RUNNING) != 0) {
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
epstop(sc);
|
|
epmbufempty(sc);
|
|
break;
|
|
} else if ((ifp->if_flags & IFF_UP) != 0 &&
|
|
(ifp->if_flags & IFF_RUNNING) == 0) {
|
|
epinit(sc);
|
|
} else {
|
|
/*
|
|
* deal with flags changes:
|
|
* IFF_MULTICAST, IFF_PROMISC,
|
|
* IFF_LINK0, IFF_LINK1,
|
|
*/
|
|
epsetfilter(sc);
|
|
epsetlink(sc);
|
|
}
|
|
break;
|
|
#ifdef notdef
|
|
case SIOCGHWADDR:
|
|
bcopy((caddr_t) sc->sc_addr, (caddr_t) &ifr->ifr_data,
|
|
sizeof(sc->sc_addr));
|
|
break;
|
|
#endif
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
epreset(sc)
|
|
struct ep_softc *sc;
|
|
{
|
|
int s = splimp();
|
|
|
|
epstop(sc);
|
|
epinit(sc);
|
|
splx(s);
|
|
}
|
|
|
|
static int
|
|
epwatchdog(unit)
|
|
int unit;
|
|
{
|
|
register struct ep_softc *sc = epcd.cd_devs[unit];
|
|
|
|
log(LOG_ERR, "%s: watchdog\n", sc->sc_dev.dv_xname);
|
|
epreset(sc);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
epstop(sc)
|
|
register struct ep_softc *sc;
|
|
{
|
|
|
|
outw(BASE + EP_COMMAND, RX_DISABLE);
|
|
outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
|
|
while (inb(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);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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: 3c509 in test mode. Erase pencil mark!\n",
|
|
sc->sc_dev.dv_xname);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
epmbuffill(sc)
|
|
struct ep_softc *sc;
|
|
{
|
|
int s, i;
|
|
|
|
s = splimp();
|
|
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;
|
|
splx(s);
|
|
}
|
|
|
|
static void
|
|
epmbufempty(sc)
|
|
struct ep_softc *sc;
|
|
{
|
|
int s, i;
|
|
|
|
s = splimp();
|
|
for (i = 0; i<MAX_MBS; i++) {
|
|
if (sc->mb[i]) {
|
|
m_freem(sc->mb[i]);
|
|
sc->mb[i] = NULL;
|
|
}
|
|
}
|
|
sc->last_mb = sc->next_mb = 0;
|
|
untimeout(epmbuffill, sc);
|
|
splx(s);
|
|
}
|