59562606b9
to TAILQs. Fix places which referenced these for no good reason that I can see (the references remain, but were fixed to compile again; they are still questionable).
1861 lines
48 KiB
C
1861 lines
48 KiB
C
/*-
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* Copyright (c) 1995, 1996
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* Paul Richards. 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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* verbatim and that no modifications are made prior to this
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* point in the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Paul Richards.
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* 4. The name Paul Richards 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 PAUL RICHARDS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL PAUL RICHARDS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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#define LNC_MULTICAST
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#define DIAGNOSTIC
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#define DEBUG
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*
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* TODO ----
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*
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* This driver will need bounce buffer support when dma'ing to mbufs above the
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* 16Mb mark.
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*
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* Check all the XXX comments -- some of them are just things I've left
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* unfinished rather than "difficult" problems that were hacked around.
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*
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* Check log settings.
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*
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* Check how all the arpcom flags get set and used.
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*
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* Re-inline and re-static all routines after debugging.
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*
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* Remember to assign iobase in SHMEM probe routines.
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*
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* Replace all occurences of LANCE-controller-card etc in prints by the name
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* strings of the appropriate type -- nifty window dressing
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*
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* Add DEPCA support -- mostly done.
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*
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*/
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#include "pci.h"
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#include "lnc.h"
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#if NLNC > 0
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#include "bpfilter.h"
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/* Some defines that should really be in generic locations */
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#define FCS_LEN 4
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#define MULTICAST_FILTER_LEN 8
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/errno.h>
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#include <sys/ioccom.h>
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#include <sys/sockio.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/syslog.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_types.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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#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/md_var.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/if_lnc.h>
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struct lnc_softc {
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struct arpcom arpcom; /* see ../../netinet/if_ether.h */
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struct nic_info nic; /* NIC specific info */
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int nrdre;
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struct host_ring_entry *recv_ring; /* start of alloc'd mem */
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int recv_next;
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int ntdre;
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struct host_ring_entry *trans_ring;
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int trans_next;
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struct init_block *init_block; /* Initialisation block */
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int pending_transmits; /* No. of transmit descriptors in use */
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int next_to_send;
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struct mbuf *mbufs;
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int mbuf_count;
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int initialised;
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int rap;
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int rdp;
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#ifdef DEBUG
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int lnc_debug;
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#endif
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LNCSTATS_STRUCT
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};
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static struct lnc_softc lnc_softc[NLNC];
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static char const * const nic_ident[] = {
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"Unknown",
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"BICC",
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"NE2100",
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"DEPCA",
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};
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static char const * const ic_ident[] = {
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"Unknown",
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"LANCE",
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"C-LANCE",
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"PCnet-ISA",
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"PCnet-ISA+",
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"PCnet-32 VL-Bus",
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"PCnet-PCI", /* "can't happen" */
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};
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#ifdef LNC_MULTICAST
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static void lnc_setladrf __P((struct lnc_softc *sc));
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#endif
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static void lnc_stop __P((struct lnc_softc *sc));
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static void lnc_reset __P((struct lnc_softc *sc));
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static void lnc_free_mbufs __P((struct lnc_softc *sc));
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static int alloc_mbuf_cluster __P((struct lnc_softc *sc, struct host_ring_entry *desc));
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static struct mbuf *chain_mbufs __P((struct lnc_softc *sc, int start_of_packet, int pkt_len));
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static struct mbuf *mbuf_packet __P((struct lnc_softc *sc, int start_of_packet, int pkt_len));
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static void lnc_rint __P((struct lnc_softc *sc));
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static void lnc_tint __P((struct lnc_softc *sc));
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static int lnc_probe __P((struct isa_device *isa_dev));
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static int ne2100_probe __P((struct lnc_softc *sc, unsigned iobase));
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static int bicc_probe __P((struct lnc_softc *sc, unsigned iobase));
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static int dec_macaddr_extract __P((u_char ring[], struct lnc_softc *sc));
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static int depca_probe __P((struct lnc_softc *sc, unsigned iobase));
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static int lance_probe __P((struct lnc_softc *sc));
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static int pcnet_probe __P((struct lnc_softc *sc));
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static int lnc_attach_sc __P((struct lnc_softc *sc, int unit));
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static int lnc_attach __P((struct isa_device *isa_dev));
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static void lnc_init __P((struct lnc_softc *sc));
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static int mbuf_to_buffer __P((struct mbuf *m, char *buffer));
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static struct mbuf *chain_to_cluster __P((struct mbuf *m));
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static void lnc_start __P((struct ifnet *ifp));
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static int lnc_ioctl __P((struct ifnet *ifp, int command, caddr_t data));
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static void lnc_watchdog __P((struct ifnet *ifp));
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#ifdef DEBUG
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static void lnc_dump_state __P((struct lnc_softc *sc));
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static void mbuf_dump_chain __P((struct mbuf *m));
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#endif
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#if NPCI > 0
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void *lnc_attach_ne2100_pci __P((int unit, unsigned iobase));
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#endif
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void lncintr_sc __P((struct lnc_softc *sc));
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struct isa_driver lncdriver = {lnc_probe, lnc_attach, "lnc"};
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static inline void
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write_csr(struct lnc_softc *sc, u_short port, u_short val)
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{
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outw(sc->rap, port);
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outw(sc->rdp, val);
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}
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static inline u_short
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read_csr(struct lnc_softc *sc, u_short port)
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{
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outw(sc->rap, port);
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return (inw(sc->rdp));
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}
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#ifdef LNC_MULTICAST
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static inline u_long
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ether_crc(u_char *ether_addr)
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{
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#define POLYNOMIAL 0x04c11db6
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u_long crc = 0xffffffffL;
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int i, j, carry;
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u_char b;
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for (i = ETHER_ADDR_LEN; --i >= 0;) {
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b = *ether_addr++;
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for (j = 8; --j >= 0;) {
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carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
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crc <<= 1;
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b >>= 1;
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if (carry)
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crc = ((crc ^ POLYNOMIAL) | carry);
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}
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}
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return crc;
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#undef POLYNOMIAL
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}
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/*
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* Set up the logical address filter for multicast packets
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*/
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static void
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lnc_setladrf(struct lnc_softc *sc)
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{
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struct ifnet *ifp = &sc->arpcom.ac_if;
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struct ether_multistep step;
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struct ether_multi *enm;
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u_long index;
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int i;
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/* If promiscuous mode is set then all packets are accepted anyway */
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if (ifp->if_flags & IFF_PROMISC) {
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ifp->if_flags |= IFF_ALLMULTI;
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for (i = 0; i < MULTICAST_FILTER_LEN; i++)
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sc->init_block->ladrf[i] = 0xff;
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return;
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}
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/*
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* For each multicast address, calculate a crc for that address and
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* then use the high order 6 bits of the crc as a hash code where
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* bits 3-5 select the byte of the address filter and bits 0-2 select
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* the bit within that byte.
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*/
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bzero(sc->init_block->ladrf, MULTICAST_FILTER_LEN);
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ETHER_FIRST_MULTI(step, &sc->arpcom, enm);
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while (enm != NULL) {
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if (bcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN) != 0) {
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/*
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* A range of multicast addresses should be accepted but
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* but for now just accept all multicasts. Only currently
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* used by multicast routing where the range would require
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* all bits to be set anyway.
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*/
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ifp->if_flags |= IFF_ALLMULTI;
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for (i = 0; i < MULTICAST_FILTER_LEN; i++)
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sc->init_block->ladrf[i] = 0xff;
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return;
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}
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index = ether_crc(enm->enm_addrlo) >> 26;
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sc->init_block->ladrf[index >> 3] |= 1 << (index & 7);
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ETHER_NEXT_MULTI(step, enm);
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}
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}
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#endif /* LNC_MULTICAST */
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static void
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lnc_stop(struct lnc_softc *sc)
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{
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write_csr(sc, CSR0, STOP);
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}
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static void
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lnc_reset(struct lnc_softc *sc)
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{
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lnc_init(sc);
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}
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static void
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lnc_free_mbufs(struct lnc_softc *sc)
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{
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int i;
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/*
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* We rely on other routines to keep the buff.mbuf field valid. If
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* it's not NULL then we assume it points to an allocated mbuf.
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*/
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for (i = 0; i < NDESC(sc->nrdre); i++)
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if ((sc->recv_ring + i)->buff.mbuf)
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m_free((sc->recv_ring + i)->buff.mbuf);
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for (i = 0; i < NDESC(sc->ntdre); i++)
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if ((sc->trans_ring + i)->buff.mbuf)
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m_free((sc->trans_ring + i)->buff.mbuf);
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if (sc->mbuf_count)
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m_freem(sc->mbufs);
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}
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static inline int
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alloc_mbuf_cluster(struct lnc_softc *sc, struct host_ring_entry *desc)
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{
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register struct mds *md = desc->md;
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struct mbuf *m=0;
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int addr;
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/* Try and get cluster off local cache */
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if (sc->mbuf_count) {
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sc->mbuf_count--;
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m = sc->mbufs;
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sc->mbufs = m->m_next;
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/* XXX m->m_data = m->m_ext.ext_buf;*/
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} else {
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MGET(m, M_DONTWAIT, MT_DATA);
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if (!m)
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return(1);
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MCLGET(m, M_DONTWAIT);
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if (!m->m_ext.ext_buf) {
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m_free(m);
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return(1);
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}
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}
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desc->buff.mbuf = m;
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addr = kvtop(m->m_data);
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md->md0 = addr;
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md->md1= ((addr >> 16) & 0xff) | OWN;
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md->md2 = -(short)(MCLBYTES - sizeof(struct pkthdr));
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md->md3 = 0;
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return(0);
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}
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static inline struct mbuf *
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chain_mbufs(struct lnc_softc *sc, int start_of_packet, int pkt_len)
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{
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struct mbuf *head, *m;
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struct host_ring_entry *desc;
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|
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/*
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* Turn head into a pkthdr mbuf --
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* assumes a pkthdr type mbuf was
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* allocated to the descriptor
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* originally.
|
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*/
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desc = sc->recv_ring + start_of_packet;
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head = desc->buff.mbuf;
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head->m_flags |= M_PKTHDR;
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m = head;
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do {
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m = desc->buff.mbuf;
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m->m_len = min((MCLBYTES - sizeof(struct pkthdr)), pkt_len);
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pkt_len -= m->m_len;
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if (alloc_mbuf_cluster(sc, desc))
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return((struct mbuf *)NULL);
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INC_MD_PTR(start_of_packet, sc->nrdre)
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desc = sc->recv_ring + start_of_packet;
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m->m_next = desc->buff.mbuf;
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} while (start_of_packet != sc->recv_next);
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m->m_next = 0;
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return(head);
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}
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|
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static inline struct mbuf *
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mbuf_packet(struct lnc_softc *sc, int start_of_packet, int pkt_len)
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{
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struct host_ring_entry *start;
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struct mbuf *head,*m,*m_prev;
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char *data,*mbuf_data;
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short blen;
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int amount;
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|
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/* Get a pkthdr mbuf for the start of packet */
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MGETHDR(head, M_DONTWAIT, MT_DATA);
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if (!head) {
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LNCSTATS(drop_packet)
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return(0);
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}
|
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|
|
m = head;
|
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m->m_len = 0;
|
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start = sc->recv_ring + start_of_packet;
|
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/*blen = -(start->md->md2);*/
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blen = RECVBUFSIZE; /* XXX More PCnet-32 crap */
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|
data = start->buff.data;
|
|
mbuf_data = m->m_data;
|
|
|
|
while (start_of_packet != sc->recv_next) {
|
|
/*
|
|
* If the data left fits in a single buffer then set
|
|
* blen to the size of the data left.
|
|
*/
|
|
if (pkt_len < blen)
|
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blen = pkt_len;
|
|
|
|
/*
|
|
* amount is least of data in current ring buffer and
|
|
* amount of space left in current mbuf.
|
|
*/
|
|
amount = min(blen, M_TRAILINGSPACE(m));
|
|
if (amount == 0) {
|
|
/* mbuf must be empty */
|
|
m_prev = m;
|
|
MGET(m, M_DONTWAIT, MT_DATA);
|
|
if (!m) {
|
|
m_freem(head);
|
|
return(0);
|
|
}
|
|
if (pkt_len >= MINCLSIZE)
|
|
MCLGET(m, M_DONTWAIT);
|
|
m->m_len = 0;
|
|
m_prev->m_next = m;
|
|
amount = min(blen, M_TRAILINGSPACE(m));
|
|
mbuf_data = m->m_data;
|
|
}
|
|
bcopy(data, mbuf_data, amount);
|
|
blen -= amount;
|
|
pkt_len -= amount;
|
|
m->m_len += amount;
|
|
data += amount;
|
|
mbuf_data += amount;
|
|
|
|
if (blen == 0) {
|
|
start->md->md1 &= HADR;
|
|
start->md->md1 |= OWN;
|
|
start->md->md2 = -RECVBUFSIZE; /* XXX - shouldn't be necessary */
|
|
INC_MD_PTR(start_of_packet, sc->nrdre)
|
|
start = sc->recv_ring + start_of_packet;
|
|
data = start->buff.data;
|
|
/*blen = -(start->md->md2);*/
|
|
blen = RECVBUFSIZE; /* XXX More PCnet-32 crap */
|
|
}
|
|
}
|
|
return(head);
|
|
}
|
|
|
|
|
|
static inline void
|
|
lnc_rint(struct lnc_softc *sc)
|
|
{
|
|
struct host_ring_entry *next, *start;
|
|
int start_of_packet;
|
|
struct mbuf *head;
|
|
struct ether_header *eh;
|
|
int lookahead;
|
|
int flags;
|
|
int pkt_len;
|
|
|
|
/*
|
|
* The LANCE will issue a RINT interrupt when the ownership of the
|
|
* last buffer of a receive packet has been relinquished by the LANCE.
|
|
* Therefore, it can be assumed that a complete packet can be found
|
|
* before hitting buffers that are still owned by the LANCE, if not
|
|
* then there is a bug in the driver that is causing the descriptors
|
|
* to get out of sync.
|
|
*/
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if ((sc->recv_ring + sc->recv_next)->md->md1 & OWN) {
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
log(LOG_ERR, "lnc%d: Receive interrupt with buffer still owned by controller -- Resetting\n", unit);
|
|
lnc_reset(sc);
|
|
return;
|
|
}
|
|
if (!((sc->recv_ring + sc->recv_next)->md->md1 & STP)) {
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
log(LOG_ERR, "lnc%d: Receive interrupt but not start of packet -- Resetting\n", unit);
|
|
lnc_reset(sc);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
lookahead = 0;
|
|
next = sc->recv_ring + sc->recv_next;
|
|
while ((flags = next->md->md1) & STP) {
|
|
|
|
/* Make a note of the start of the packet */
|
|
start_of_packet = sc->recv_next;
|
|
|
|
/*
|
|
* Find the end of the packet. Even if not data chaining,
|
|
* jabber packets can overrun into a second descriptor.
|
|
* If there is no error, then the ENP flag is set in the last
|
|
* descriptor of the packet. If there is an error then the ERR
|
|
* flag will be set in the descriptor where the error occured.
|
|
* Therefore, to find the last buffer of a packet we search for
|
|
* either ERR or ENP.
|
|
*/
|
|
|
|
if (!(flags & (ENP | MDERR))) {
|
|
do {
|
|
INC_MD_PTR(sc->recv_next, sc->nrdre)
|
|
next = sc->recv_ring + sc->recv_next;
|
|
flags = next->md->md1;
|
|
} while (!(flags & (STP | OWN | ENP | MDERR)));
|
|
|
|
if (flags & STP) {
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
log(LOG_ERR, "lnc%d: Start of packet found before end of previous in receive ring -- Resetting\n", unit);
|
|
lnc_reset(sc);
|
|
return;
|
|
}
|
|
if (flags & OWN) {
|
|
if (lookahead) {
|
|
/*
|
|
* Looked ahead into a packet still
|
|
* being received
|
|
*/
|
|
sc->recv_next = start_of_packet;
|
|
break;
|
|
} else {
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
log(LOG_ERR, "lnc%d: End of received packet not found-- Resetting\n", unit);
|
|
lnc_reset(sc);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
pkt_len = (next->md->md3 & MCNT) - FCS_LEN;
|
|
|
|
/* Move pointer onto start of next packet */
|
|
INC_MD_PTR(sc->recv_next, sc->nrdre)
|
|
next = sc->recv_ring + sc->recv_next;
|
|
|
|
if (flags & MDERR) {
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
if (flags & RBUFF) {
|
|
LNCSTATS(rbuff)
|
|
log(LOG_ERR, "lnc%d: Receive buffer error\n", unit);
|
|
}
|
|
if (flags & OFLO) {
|
|
/* OFLO only valid if ENP is not set */
|
|
if (!(flags & ENP)) {
|
|
LNCSTATS(oflo)
|
|
log(LOG_ERR, "lnc%d: Receive overflow error \n", unit);
|
|
}
|
|
} else if (flags & ENP) {
|
|
/*
|
|
* FRAM and CRC are valid only if ENP
|
|
* is set and OFLO is not.
|
|
*/
|
|
if (flags & FRAM) {
|
|
LNCSTATS(fram)
|
|
log(LOG_ERR, "lnc%d: Framming error\n", unit);
|
|
/*
|
|
* FRAM is only set if there's a CRC
|
|
* error so avoid multiple messages
|
|
*/
|
|
} else if (flags & CRC) {
|
|
LNCSTATS(crc)
|
|
log(LOG_ERR, "lnc%d: Receive CRC error\n", unit);
|
|
}
|
|
}
|
|
|
|
/* Drop packet */
|
|
LNCSTATS(rerr)
|
|
sc->arpcom.ac_if.if_ierrors++;
|
|
while (start_of_packet != sc->recv_next) {
|
|
start = sc->recv_ring + start_of_packet;
|
|
start->md->md2 = -RECVBUFSIZE; /* XXX - shouldn't be necessary */
|
|
start->md->md1 &= HADR;
|
|
start->md->md1 |= OWN;
|
|
INC_MD_PTR(start_of_packet, sc->nrdre)
|
|
}
|
|
} else { /* Valid packet */
|
|
|
|
sc->arpcom.ac_if.if_ipackets++;
|
|
|
|
|
|
if (sc->nic.mem_mode == DMA_MBUF)
|
|
head = chain_mbufs(sc, start_of_packet, pkt_len);
|
|
else
|
|
head = mbuf_packet(sc, start_of_packet, pkt_len);
|
|
|
|
if (head) {
|
|
/*
|
|
* First mbuf in packet holds the
|
|
* ethernet and packet headers
|
|
*/
|
|
head->m_pkthdr.rcvif = &sc->arpcom.ac_if;
|
|
head->m_pkthdr.len = pkt_len - sizeof *eh;
|
|
|
|
/*
|
|
* BPF expects the ether header to be in the first
|
|
* mbuf of the chain so point eh at the right place
|
|
* but don't increment the mbuf pointers before
|
|
* the bpf tap.
|
|
*/
|
|
|
|
eh = (struct ether_header *) head->m_data;
|
|
|
|
#if NBPFILTER > 0
|
|
if (sc->arpcom.ac_if.if_bpf)
|
|
bpf_mtap(&sc->arpcom.ac_if, head);
|
|
|
|
/* Check this packet is really for us */
|
|
|
|
if ((sc->arpcom.ac_if.if_flags & IFF_PROMISC) &&
|
|
!(eh->ether_dhost[0] & 1) && /* Broadcast and multicast */
|
|
(bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr,
|
|
sizeof(eh->ether_dhost))))
|
|
m_freem(head);
|
|
else
|
|
#endif
|
|
{
|
|
/* Skip over the ether header */
|
|
head->m_data += sizeof *eh;
|
|
head->m_len -= sizeof *eh;
|
|
|
|
ether_input(&sc->arpcom.ac_if, eh, head);
|
|
}
|
|
|
|
} else {
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
log(LOG_ERR,"lnc%d: Packet dropped, no mbufs\n",unit);
|
|
LNCSTATS(drop_packet)
|
|
}
|
|
}
|
|
|
|
lookahead++;
|
|
}
|
|
|
|
/*
|
|
* At this point all completely received packets have been processed
|
|
* so clear RINT since any packets that have arrived while we were in
|
|
* here have been dealt with.
|
|
*/
|
|
|
|
outw(sc->rdp, RINT | INEA);
|
|
}
|
|
|
|
static inline void
|
|
lnc_tint(struct lnc_softc *sc)
|
|
{
|
|
struct host_ring_entry *next, *start;
|
|
int start_of_packet;
|
|
int lookahead;
|
|
|
|
/*
|
|
* If the driver is reset in this routine then we return immediately to
|
|
* the interrupt driver routine. Any interrupts that have occured
|
|
* since the reset will be dealt with there. sc->trans_next
|
|
* should point to the start of the first packet that was awaiting
|
|
* transmission after the last transmit interrupt was dealt with. The
|
|
* LANCE should have relinquished ownership of that descriptor before
|
|
* the interrupt. Therefore, sc->trans_next should point to a
|
|
* descriptor with STP set and OWN cleared. If not then the driver's
|
|
* pointers are out of sync with the LANCE, which signifies a bug in
|
|
* the driver. Therefore, the following two checks are really
|
|
* diagnostic, since if the driver is working correctly they should
|
|
* never happen.
|
|
*/
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if ((sc->trans_ring + sc->trans_next)->md->md1 & OWN) {
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
log(LOG_ERR, "lnc%d: Transmit interrupt with buffer still owned by controller -- Resetting\n", unit);
|
|
lnc_reset(sc);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* The LANCE will write the status information for the packet it just
|
|
* tried to transmit in one of two places. If the packet was
|
|
* transmitted successfully then the status will be written into the
|
|
* last descriptor of the packet. If the transmit failed then the
|
|
* status will be written into the descriptor that was being accessed
|
|
* when the error occured and all subsequent descriptors in that
|
|
* packet will have been relinquished by the LANCE.
|
|
*
|
|
* At this point we know that sc->trans_next points to the start
|
|
* of a packet that the LANCE has just finished trying to transmit.
|
|
* We now search for a buffer with either ENP or ERR set.
|
|
*/
|
|
|
|
lookahead = 0;
|
|
|
|
do {
|
|
start_of_packet = sc->trans_next;
|
|
next = sc->trans_ring + sc->trans_next;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (!(next->md->md1 & STP)) {
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
log(LOG_ERR, "lnc%d: Transmit interrupt but not start of packet -- Resetting\n", unit);
|
|
lnc_reset(sc);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Find end of packet.
|
|
*/
|
|
|
|
if (!(next->md->md1 & (ENP | MDERR))) {
|
|
do {
|
|
INC_MD_PTR(sc->trans_next, sc->ntdre)
|
|
next = sc->trans_ring + sc->trans_next;
|
|
} while (!(next->md->md1 & (STP | OWN | ENP | MDERR)));
|
|
|
|
if (next->md->md1 & STP) {
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
log(LOG_ERR, "lnc%d: Start of packet found before end of previous in transmit ring -- Resetting\n", unit);
|
|
lnc_reset(sc);
|
|
return;
|
|
}
|
|
if (next->md->md1 & OWN) {
|
|
if (lookahead) {
|
|
/*
|
|
* Looked ahead into a packet still
|
|
* being transmitted
|
|
*/
|
|
sc->trans_next = start_of_packet;
|
|
break;
|
|
} else {
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
log(LOG_ERR, "lnc%d: End of transmitted packet not found -- Resetting\n", unit);
|
|
lnc_reset(sc);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* Check for ERR first since other flags are irrelevant if an
|
|
* error occurred.
|
|
*/
|
|
if (next->md->md1 & MDERR) {
|
|
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
|
|
LNCSTATS(terr)
|
|
sc->arpcom.ac_if.if_oerrors++;
|
|
|
|
if (next->md->md3 & LCOL) {
|
|
LNCSTATS(lcol)
|
|
log(LOG_ERR, "lnc%d: Transmit late collision -- Net error?\n", unit);
|
|
sc->arpcom.ac_if.if_collisions++;
|
|
/*
|
|
* Clear TBUFF since it's not valid when LCOL
|
|
* set
|
|
*/
|
|
next->md->md3 &= ~TBUFF;
|
|
}
|
|
if (next->md->md3 & LCAR) {
|
|
LNCSTATS(lcar)
|
|
log(LOG_ERR, "lnc%d: Loss of carrier during transmit -- Net error?\n", unit);
|
|
}
|
|
if (next->md->md3 & RTRY) {
|
|
LNCSTATS(rtry)
|
|
log(LOG_ERR, "lnc%d: Transmit of packet failed after 16 attempts -- TDR = %d\n", unit, ((sc->trans_ring + sc->trans_next)->md->md3 & TDR));
|
|
sc->arpcom.ac_if.if_collisions += 16;
|
|
/*
|
|
* Clear TBUFF since it's not valid when RTRY
|
|
* set
|
|
*/
|
|
next->md->md3 &= ~TBUFF;
|
|
}
|
|
/*
|
|
* TBUFF is only valid if neither LCOL nor RTRY are set.
|
|
* We need to check UFLO after LCOL and RTRY so that we
|
|
* know whether or not TBUFF is valid. If either are
|
|
* set then TBUFF will have been cleared above. A
|
|
* UFLO error will turn off the transmitter so we
|
|
* have to reset.
|
|
*
|
|
*/
|
|
|
|
if (next->md->md3 & UFLO) {
|
|
LNCSTATS(uflo)
|
|
/*
|
|
* If an UFLO has occured it's possibly due
|
|
* to a TBUFF error
|
|
*/
|
|
if (next->md->md3 & TBUFF) {
|
|
LNCSTATS(tbuff)
|
|
log(LOG_ERR, "lnc%d: Transmit buffer error -- Resetting\n", unit);
|
|
} else
|
|
log(LOG_ERR, "lnc%d: Transmit underflow error -- Resetting\n", unit);
|
|
lnc_reset(sc);
|
|
return;
|
|
}
|
|
do {
|
|
INC_MD_PTR(sc->trans_next, sc->ntdre)
|
|
next = sc->trans_ring + sc->trans_next;
|
|
} while (!(next->md->md1 & STP) && (sc->trans_next != sc->next_to_send));
|
|
|
|
} else {
|
|
/*
|
|
* Since we check for ERR first then if we get here
|
|
* the packet was transmitted correctly. There may
|
|
* still have been non-fatal errors though.
|
|
* Don't bother checking for DEF, waste of time.
|
|
*/
|
|
|
|
sc->arpcom.ac_if.if_opackets++;
|
|
|
|
if (next->md->md1 & MORE) {
|
|
LNCSTATS(more)
|
|
sc->arpcom.ac_if.if_collisions += 2;
|
|
}
|
|
|
|
/*
|
|
* ONE is invalid if LCOL is set. If LCOL was set then
|
|
* ERR would have also been set and we would have
|
|
* returned from lnc_tint above. Therefore we can
|
|
* assume if we arrive here that ONE is valid.
|
|
*
|
|
*/
|
|
|
|
if (next->md->md1 & ONE) {
|
|
LNCSTATS(one)
|
|
sc->arpcom.ac_if.if_collisions++;
|
|
}
|
|
INC_MD_PTR(sc->trans_next, sc->ntdre)
|
|
next = sc->trans_ring + sc->trans_next;
|
|
}
|
|
|
|
/*
|
|
* Clear descriptors and free any mbufs.
|
|
*/
|
|
|
|
do {
|
|
start = sc->trans_ring + start_of_packet;
|
|
start->md->md1 &= HADR;
|
|
if (sc->nic.mem_mode == DMA_MBUF) {
|
|
/* Cache clusters on a local queue */
|
|
if ((start->buff.mbuf->m_flags & M_EXT) && (sc->mbuf_count < MBUF_CACHE_LIMIT)) {
|
|
if (sc->mbuf_count) {
|
|
start->buff.mbuf->m_next = sc->mbufs;
|
|
sc->mbufs = start->buff.mbuf;
|
|
} else
|
|
sc->mbufs = start->buff.mbuf;
|
|
sc->mbuf_count++;
|
|
start->buff.mbuf = 0;
|
|
} else {
|
|
struct mbuf *junk;
|
|
MFREE(start->buff.mbuf, junk);
|
|
start->buff.mbuf = 0;
|
|
}
|
|
}
|
|
sc->pending_transmits--;
|
|
INC_MD_PTR(start_of_packet, sc->ntdre)
|
|
}while (start_of_packet != sc->trans_next);
|
|
|
|
/*
|
|
* There's now at least one free descriptor
|
|
* in the ring so indicate that we can accept
|
|
* more packets again.
|
|
*/
|
|
|
|
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
|
|
|
|
lookahead++;
|
|
|
|
} while (sc->pending_transmits && !(next->md->md1 & OWN));
|
|
|
|
/*
|
|
* Clear TINT since we've dealt with all
|
|
* the completed transmissions.
|
|
*/
|
|
|
|
outw(sc->rdp, TINT | INEA);
|
|
|
|
/* XXX only while doing if_is comparisons */
|
|
if (!(sc->arpcom.ac_if.if_flags & IFF_OACTIVE))
|
|
lnc_start(&sc->arpcom.ac_if);
|
|
|
|
}
|
|
|
|
static int
|
|
lnc_probe(struct isa_device * isa_dev)
|
|
{
|
|
int nports;
|
|
int unit = isa_dev->id_unit;
|
|
struct lnc_softc *sc = &lnc_softc[unit];
|
|
unsigned iobase = isa_dev->id_iobase;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
int vsw;
|
|
vsw = inw(isa_dev->id_iobase + PCNET_VSW);
|
|
printf("Vendor Specific Word = %x\n", vsw);
|
|
#endif
|
|
|
|
nports = bicc_probe(sc, iobase);
|
|
if (nports == 0)
|
|
nports = ne2100_probe(sc, iobase);
|
|
if (nports == 0)
|
|
nports = depca_probe(sc, iobase);
|
|
return (nports);
|
|
}
|
|
|
|
static int
|
|
ne2100_probe(struct lnc_softc *sc, unsigned iobase)
|
|
{
|
|
int i;
|
|
|
|
sc->rap = iobase + PCNET_RAP;
|
|
sc->rdp = iobase + PCNET_RDP;
|
|
|
|
if ((sc->nic.ic = pcnet_probe(sc))) {
|
|
sc->nic.ident = NE2100;
|
|
sc->nic.mem_mode = DMA_FIXED;
|
|
|
|
/* XXX - For now just use the defines */
|
|
sc->nrdre = NRDRE;
|
|
sc->ntdre = NTDRE;
|
|
|
|
/* Extract MAC address from PROM */
|
|
for (i = 0; i < ETHER_ADDR_LEN; i++)
|
|
sc->arpcom.ac_enaddr[i] = inb(iobase + i);
|
|
return (NE2100_IOSIZE);
|
|
} else {
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
static int
|
|
bicc_probe(struct lnc_softc *sc, unsigned iobase)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* There isn't any way to determine if a NIC is a BICC. Basically, if
|
|
* the lance probe succeeds using the i/o addresses of the BICC then
|
|
* we assume it's a BICC.
|
|
*
|
|
*/
|
|
|
|
sc->rap = iobase + BICC_RAP;
|
|
sc->rdp = iobase + BICC_RDP;
|
|
|
|
/* I think all these cards us the Am7990 */
|
|
|
|
if ((sc->nic.ic = lance_probe(sc))) {
|
|
sc->nic.ident = BICC;
|
|
sc->nic.mem_mode = DMA_FIXED;
|
|
|
|
/* XXX - For now just use the defines */
|
|
sc->nrdre = NRDRE;
|
|
sc->ntdre = NTDRE;
|
|
|
|
/* Extract MAC address from PROM */
|
|
for (i = 0; i < ETHER_ADDR_LEN; i++)
|
|
sc->arpcom.ac_enaddr[i] = inb(iobase + (i * 2));
|
|
|
|
return (BICC_IOSIZE);
|
|
} else {
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* I don't have data sheets for the dec cards but it looks like the mac
|
|
* address is contained in a 32 byte ring. Each time you read from the port
|
|
* you get the next byte in the ring. The mac address is stored after a
|
|
* signature so keep searching for the signature first.
|
|
*/
|
|
static int
|
|
dec_macaddr_extract(u_char ring[], struct lnc_softc * sc)
|
|
{
|
|
const unsigned char signature[] = {0xff, 0x00, 0x55, 0xaa, 0xff, 0x00, 0x55, 0xaa};
|
|
|
|
int i, j, rindex;
|
|
|
|
for (i = 0; i < sizeof ring; i++) {
|
|
for (j = 0, rindex = i; j < sizeof signature; j++) {
|
|
if (ring[rindex] != signature[j])
|
|
break;
|
|
if (++rindex > sizeof ring)
|
|
rindex = 0;
|
|
}
|
|
if (j == sizeof signature) {
|
|
for (j = 0, rindex = i; j < ETHER_ADDR_LEN; j++) {
|
|
sc->arpcom.ac_enaddr[j] = ring[rindex];
|
|
if (++rindex > sizeof ring)
|
|
rindex = 0;
|
|
}
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
depca_probe(struct lnc_softc *sc, unsigned iobase)
|
|
{
|
|
int i;
|
|
unsigned char maddr_ring[DEPCA_ADDR_ROM_SIZE];
|
|
|
|
sc->rap = iobase + DEPCA_RAP;
|
|
sc->rdp = iobase + DEPCA_RDP;
|
|
|
|
if ((sc->nic.ic = lance_probe(sc))) {
|
|
sc->nic.ident = DEPCA;
|
|
sc->nic.mem_mode = SHMEM;
|
|
|
|
/* Extract MAC address from PROM */
|
|
for (i = 0; i < DEPCA_ADDR_ROM_SIZE; i++)
|
|
maddr_ring[i] = inb(iobase + DEPCA_ADP);
|
|
if (dec_macaddr_extract(maddr_ring, sc)) {
|
|
return (DEPCA_IOSIZE);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lance_probe(struct lnc_softc *sc)
|
|
{
|
|
write_csr(sc, CSR0, STOP);
|
|
|
|
if ((inw(sc->rdp) & STOP) && !(read_csr(sc, CSR3))) {
|
|
/*
|
|
* Check to see if it's a C-LANCE. For the LANCE the INEA bit
|
|
* cannot be set while the STOP bit is. This restriction is
|
|
* removed for the C-LANCE.
|
|
*/
|
|
write_csr(sc, CSR0, INEA);
|
|
if (read_csr(sc, CSR0) & INEA)
|
|
return (C_LANCE);
|
|
else
|
|
return (LANCE);
|
|
} else
|
|
return (UNKNOWN);
|
|
}
|
|
|
|
static int
|
|
pcnet_probe(struct lnc_softc *sc)
|
|
{
|
|
u_long chip_id;
|
|
int type;
|
|
|
|
/*
|
|
* The PCnet family don't reset the RAP register on reset so we'll
|
|
* have to write during the probe :-) It does have an ID register
|
|
* though so the probe is just a matter of reading it.
|
|
*/
|
|
|
|
if ((type = lance_probe(sc))) {
|
|
|
|
chip_id = read_csr(sc, CSR89);
|
|
chip_id <<= 16;
|
|
chip_id |= read_csr(sc, CSR88);
|
|
if (chip_id & AMD_MASK) {
|
|
chip_id >>= 12;
|
|
switch (chip_id & PART_MASK) {
|
|
case Am79C960:
|
|
return (PCnet_ISA);
|
|
case Am79C961:
|
|
return (PCnet_ISAplus);
|
|
case Am79C965:
|
|
return (PCnet_32);
|
|
case Am79C970:
|
|
/*
|
|
* do NOT try to ISA attach the PCI version
|
|
*/
|
|
return (0);
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return (type);
|
|
}
|
|
|
|
static int
|
|
lnc_attach_sc(struct lnc_softc *sc, int unit)
|
|
{
|
|
int lnc_mem_size;
|
|
|
|
/*
|
|
* Allocate memory for use by the controller.
|
|
*
|
|
* XXX -- the Am7990 and Am79C960 only have 24 address lines and so can
|
|
* only access the lower 16Mb of physical memory. For the moment we
|
|
* assume that malloc will allocate memory within the lower 16Mb
|
|
* range. This is not a very valid assumption but there's nothing
|
|
* that can be done about it yet. For shared memory NICs this isn't
|
|
* relevant.
|
|
*
|
|
*/
|
|
|
|
lnc_mem_size = ((NDESC(sc->nrdre) + NDESC(sc->ntdre)) *
|
|
sizeof(struct host_ring_entry));
|
|
|
|
if (sc->nic.mem_mode != SHMEM)
|
|
lnc_mem_size += sizeof(struct init_block) + (sizeof(struct mds) *
|
|
(NDESC(sc->nrdre) + NDESC(sc->ntdre))) +
|
|
MEM_SLEW;
|
|
|
|
/* If using DMA to fixed host buffers then allocate memory for them */
|
|
|
|
if (sc->nic.mem_mode == DMA_FIXED)
|
|
lnc_mem_size += (NDESC(sc->nrdre) * RECVBUFSIZE) + (NDESC(sc->ntdre) * TRANSBUFSIZE);
|
|
|
|
sc->recv_ring = malloc(lnc_mem_size, M_DEVBUF, M_NOWAIT);
|
|
|
|
if (!sc->recv_ring) {
|
|
log(LOG_ERR, "lnc%d: Couldn't allocate memory for NIC\n", unit);
|
|
return (0); /* XXX -- attach failed -- not tested in
|
|
* calling routines */
|
|
}
|
|
/*
|
|
* XXX - Shouldn't this be skipped for the EISA and PCI versions ???
|
|
* Print the message but do not return for the PCnet_PCI !
|
|
*/
|
|
if ((sc->nic.mem_mode != SHMEM) && (kvtop(sc->recv_ring) > 0x1000000)) {
|
|
log(LOG_ERR, "lnc%d: Memory allocated above 16Mb limit\n", unit);
|
|
if (sc->nic.ic != PCnet_PCI)
|
|
return (0);
|
|
}
|
|
|
|
/* Set default mode */
|
|
sc->nic.mode = NORMAL;
|
|
|
|
/* Fill in arpcom structure entries */
|
|
|
|
sc->arpcom.ac_if.if_softc = sc;
|
|
sc->arpcom.ac_if.if_name = lncdriver.name;
|
|
sc->arpcom.ac_if.if_unit = unit;
|
|
sc->arpcom.ac_if.if_mtu = ETHERMTU;
|
|
sc->arpcom.ac_if.if_flags = IFF_BROADCAST | IFF_SIMPLEX;
|
|
sc->arpcom.ac_if.if_timer = 0;
|
|
sc->arpcom.ac_if.if_output = ether_output;
|
|
sc->arpcom.ac_if.if_start = lnc_start;
|
|
sc->arpcom.ac_if.if_ioctl = lnc_ioctl;
|
|
sc->arpcom.ac_if.if_watchdog = lnc_watchdog;
|
|
sc->arpcom.ac_if.if_type = IFT_ETHER;
|
|
sc->arpcom.ac_if.if_addrlen = ETHER_ADDR_LEN;
|
|
sc->arpcom.ac_if.if_hdrlen = ETHER_HDR_LEN;
|
|
|
|
/*
|
|
* XXX -- should check return status of if_attach
|
|
*/
|
|
|
|
if_attach(&sc->arpcom.ac_if);
|
|
ether_ifattach(&sc->arpcom.ac_if);
|
|
|
|
printf("lnc%d: ", unit);
|
|
if (sc->nic.ic == LANCE || sc->nic.ic == C_LANCE)
|
|
printf("%s (%s)",
|
|
nic_ident[sc->nic.ident], ic_ident[sc->nic.ic]);
|
|
else
|
|
printf("%s", ic_ident[sc->nic.ic]);
|
|
printf(" address %6D\n", sc->arpcom.ac_enaddr, ":");
|
|
|
|
#if NBPFILTER > 0
|
|
bpfattach(&sc->arpcom.ac_if, DLT_EN10MB, sizeof(struct ether_header));
|
|
#endif
|
|
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
lnc_attach(struct isa_device * isa_dev)
|
|
{
|
|
int unit = isa_dev->id_unit;
|
|
struct lnc_softc *sc = &lnc_softc[unit];
|
|
|
|
int result = lnc_attach_sc (sc, unit);
|
|
if (result == 0)
|
|
return (0);
|
|
/*
|
|
* XXX - is it safe to call isa_dmacascade() after if_attach()
|
|
* and ether_ifattach() have been called in lnc_attach() ???
|
|
*/
|
|
if ((sc->nic.mem_mode != SHMEM) &&
|
|
(sc->nic.ic != PCnet_32) &&
|
|
(sc->nic.ic != PCnet_PCI))
|
|
isa_dmacascade(isa_dev->id_drq);
|
|
|
|
return result;
|
|
}
|
|
|
|
#if NPCI > 0
|
|
void *
|
|
lnc_attach_ne2100_pci(int unit, unsigned iobase)
|
|
{
|
|
struct lnc_softc *sc = malloc(sizeof *sc, M_DEVBUF, M_NOWAIT);
|
|
|
|
if (sc) {
|
|
bzero (sc, sizeof *sc);
|
|
|
|
if ((ne2100_probe(sc, iobase) == 0)
|
|
|| (lnc_attach_sc(sc, unit) == 0)) {
|
|
free(sc, M_DEVBUF);
|
|
sc = NULL;
|
|
}
|
|
}
|
|
return sc;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
lnc_init(struct lnc_softc *sc)
|
|
{
|
|
int s, i;
|
|
char *lnc_mem;
|
|
|
|
/* Check that interface has valid address */
|
|
|
|
if (TAILQ_EMPTY(&sc->arpcom.ac_if.if_addrhead)) /* XXX unlikely */
|
|
return;
|
|
|
|
/* Shut down interface */
|
|
|
|
s = splimp();
|
|
lnc_stop(sc);
|
|
sc->arpcom.ac_if.if_flags |= IFF_BROADCAST | IFF_SIMPLEX; /* XXX??? */
|
|
|
|
/*
|
|
* This sets up the memory area for the controller. Memory is set up for
|
|
* the initialisation block (12 words of contiguous memory starting
|
|
* on a word boundary),the transmit and receive ring structures (each
|
|
* entry is 4 words long and must start on a quadword boundary) and
|
|
* the data buffers.
|
|
*
|
|
* The alignment tests are particularly paranoid.
|
|
*/
|
|
|
|
|
|
|
|
sc->recv_next = 0;
|
|
sc->trans_ring = sc->recv_ring + NDESC(sc->nrdre);
|
|
sc->trans_next = 0;
|
|
|
|
if (sc->nic.mem_mode == SHMEM)
|
|
lnc_mem = (char *) sc->nic.iobase;
|
|
else
|
|
lnc_mem = (char *) (sc->trans_ring + NDESC(sc->ntdre));
|
|
|
|
lnc_mem = (char *)(((int)lnc_mem + 1) & ~1);
|
|
sc->init_block = (struct init_block *) ((int) lnc_mem & ~1);
|
|
lnc_mem = (char *) (sc->init_block + 1);
|
|
lnc_mem = (char *)(((int)lnc_mem + 7) & ~7);
|
|
|
|
/* Initialise pointers to descriptor entries */
|
|
for (i = 0; i < NDESC(sc->nrdre); i++) {
|
|
(sc->recv_ring + i)->md = (struct mds *) lnc_mem;
|
|
lnc_mem += sizeof(struct mds);
|
|
}
|
|
for (i = 0; i < NDESC(sc->ntdre); i++) {
|
|
(sc->trans_ring + i)->md = (struct mds *) lnc_mem;
|
|
lnc_mem += sizeof(struct mds);
|
|
}
|
|
|
|
/* Initialise the remaining ring entries */
|
|
|
|
if (sc->nic.mem_mode == DMA_MBUF) {
|
|
|
|
sc->mbufs = 0;
|
|
sc->mbuf_count = 0;
|
|
|
|
/* Free previously allocated mbufs */
|
|
if (sc->initialised)
|
|
lnc_free_mbufs(sc);
|
|
|
|
|
|
for (i = 0; i < NDESC(sc->nrdre); i++) {
|
|
if (alloc_mbuf_cluster(sc, sc->recv_ring+i)) {
|
|
log(LOG_ERR, "Initialisation failed -- no mbufs\n");
|
|
splx(s);
|
|
return;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < NDESC(sc->ntdre); i++) {
|
|
(sc->trans_ring + i)->buff.mbuf = 0;
|
|
(sc->trans_ring + i)->md->md0 = 0;
|
|
(sc->trans_ring + i)->md->md1 = 0;
|
|
(sc->trans_ring + i)->md->md2 = 0;
|
|
(sc->trans_ring + i)->md->md3 = 0;
|
|
}
|
|
} else {
|
|
for (i = 0; i < NDESC(sc->nrdre); i++) {
|
|
(sc->recv_ring + i)->md->md0 = kvtop(lnc_mem);
|
|
(sc->recv_ring + i)->md->md1 = ((kvtop(lnc_mem) >> 16) & 0xff) | OWN;
|
|
(sc->recv_ring + i)->md->md2 = -RECVBUFSIZE;
|
|
(sc->recv_ring + i)->md->md3 = 0;
|
|
(sc->recv_ring + i)->buff.data = lnc_mem;
|
|
lnc_mem += RECVBUFSIZE;
|
|
}
|
|
for (i = 0; i < NDESC(sc->ntdre); i++) {
|
|
(sc->trans_ring + i)->md->md0 = kvtop(lnc_mem);
|
|
(sc->trans_ring + i)->md->md1 = ((kvtop(lnc_mem) >> 16) & 0xff);
|
|
(sc->trans_ring + i)->md->md2 = 0;
|
|
(sc->trans_ring + i)->md->md3 = 0;
|
|
(sc->trans_ring + i)->buff.data = lnc_mem;
|
|
lnc_mem += TRANSBUFSIZE;
|
|
}
|
|
}
|
|
|
|
sc->next_to_send = 0;
|
|
|
|
/* Set up initialisation block */
|
|
|
|
sc->init_block->mode = sc->nic.mode;
|
|
|
|
for (i = 0; i < ETHER_ADDR_LEN; i++)
|
|
sc->init_block->padr[i] = sc->arpcom.ac_enaddr[i];
|
|
|
|
#ifdef LNC_MULTICAST
|
|
lnc_setladrf(sc);
|
|
#else
|
|
for (i = 0; i < MULTICAST_FILTER_LEN; i++)
|
|
sc->init_block->ladrf[i] = MULTI_INIT_ADDR;
|
|
#endif
|
|
|
|
sc->init_block->rdra = kvtop(sc->recv_ring->md);
|
|
sc->init_block->rlen = ((kvtop(sc->recv_ring->md) >> 16) & 0xff) | (sc->nrdre << 13);
|
|
sc->init_block->tdra = kvtop(sc->trans_ring->md);
|
|
sc->init_block->tlen = ((kvtop(sc->trans_ring->md) >> 16) & 0xff) | (sc->ntdre << 13);
|
|
|
|
|
|
/* Set initialised to show that the memory area is valid */
|
|
sc->initialised = 1;
|
|
|
|
sc->pending_transmits = 0;
|
|
|
|
/* Give the LANCE the physical address of the initialisation block */
|
|
|
|
write_csr(sc, CSR1, kvtop(sc->init_block));
|
|
write_csr(sc, CSR2, (kvtop(sc->init_block) >> 16) & 0xff);
|
|
|
|
/*
|
|
* Depending on which controller this is, CSR3 has different meanings.
|
|
* For the Am7990 it controls DMA operations, for the Am79C960 it
|
|
* controls interrupt masks and transmitter algorithms. In either
|
|
* case, none of the flags are set.
|
|
*
|
|
*/
|
|
|
|
write_csr(sc, CSR3, 0);
|
|
|
|
/* Let's see if it starts */
|
|
|
|
write_csr(sc, CSR0, INIT);
|
|
for (i = 0; i < 1000; i++)
|
|
if (read_csr(sc, CSR0) & IDON)
|
|
break;
|
|
|
|
/*
|
|
* Now that the initialisation is complete there's no reason to
|
|
* access anything except CSR0, so we leave RAP pointing there
|
|
* so we can just access RDP from now on, saving an outw each
|
|
* time.
|
|
*/
|
|
|
|
if (read_csr(sc, CSR0) & IDON) {
|
|
/*
|
|
* Enable interrupts, start the LANCE, mark the interface as
|
|
* running and transmit any pending packets.
|
|
*/
|
|
write_csr(sc, CSR0, STRT | INEA);
|
|
sc->arpcom.ac_if.if_flags |= IFF_RUNNING;
|
|
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
|
|
lnc_start(&sc->arpcom.ac_if);
|
|
} else
|
|
log(LOG_ERR, "lnc%d: Initialisation failed\n",
|
|
sc->arpcom.ac_if.if_unit);
|
|
|
|
splx(s);
|
|
}
|
|
|
|
/*
|
|
* The interrupt flag (INTR) will be set and provided that the interrupt enable
|
|
* flag (INEA) is also set, the interrupt pin will be driven low when any of
|
|
* the following occur:
|
|
*
|
|
* 1) Completion of the initialisation routine (IDON). 2) The reception of a
|
|
* packet (RINT). 3) The transmission of a packet (TINT). 4) A transmitter
|
|
* timeout error (BABL). 5) A missed packet (MISS). 6) A memory error (MERR).
|
|
*
|
|
* The interrupt flag is cleared when all of the above conditions are cleared.
|
|
*
|
|
* If the driver is reset from this routine then it first checks to see if any
|
|
* interrupts have ocurred since the reset and handles them before returning.
|
|
* This is because the NIC may signify a pending interrupt in CSR0 using the
|
|
* INTR flag even if a hardware interrupt is currently inhibited (at least I
|
|
* think it does from reading the data sheets). We may as well deal with
|
|
* these pending interrupts now rather than get the overhead of another
|
|
* hardware interrupt immediately upon returning from the interrupt handler.
|
|
*
|
|
*/
|
|
|
|
void
|
|
lncintr_sc(struct lnc_softc *sc)
|
|
{
|
|
int unit = sc->arpcom.ac_if.if_unit;
|
|
u_short csr0;
|
|
|
|
/*
|
|
* INEA is the only bit that can be cleared by writing a 0 to it so
|
|
* we have to include it in any writes that clear other flags.
|
|
*/
|
|
|
|
while ((csr0 = inw(sc->rdp)) & INTR) {
|
|
|
|
/*
|
|
* Clear interrupt flags early to avoid race conditions. The
|
|
* controller can still set these flags even while we're in
|
|
* this interrupt routine. If the flag is still set from the
|
|
* event that caused this interrupt any new events will
|
|
* be missed.
|
|
*/
|
|
|
|
outw(sc->rdp, IDON | CERR | BABL | MISS | MERR | RINT | TINT | INEA);
|
|
|
|
/* We don't do anything with the IDON flag */
|
|
|
|
if (csr0 & ERR) {
|
|
if (csr0 & CERR) {
|
|
log(LOG_ERR, "lnc%d: Heartbeat error -- SQE test failed\n", unit);
|
|
LNCSTATS(cerr)
|
|
}
|
|
if (csr0 & BABL) {
|
|
log(LOG_ERR, "lnc%d: Babble error - more than 1519 bytes transmitted\n", unit);
|
|
LNCSTATS(babl)
|
|
sc->arpcom.ac_if.if_oerrors++;
|
|
}
|
|
if (csr0 & MISS) {
|
|
log(LOG_ERR, "lnc%d: Missed packet -- no receive buffer\n", unit);
|
|
LNCSTATS(miss)
|
|
sc->arpcom.ac_if.if_ierrors++;
|
|
}
|
|
if (csr0 & MERR) {
|
|
log(LOG_ERR, "lnc%d: Memory error -- Resetting\n", unit);
|
|
LNCSTATS(merr)
|
|
lnc_reset(sc);
|
|
continue;
|
|
}
|
|
}
|
|
if (csr0 & RINT) {
|
|
LNCSTATS(rint)
|
|
lnc_rint(sc);
|
|
}
|
|
if (csr0 & TINT) {
|
|
LNCSTATS(tint)
|
|
sc->arpcom.ac_if.if_timer = 0;
|
|
lnc_tint(sc);
|
|
}
|
|
|
|
/*
|
|
* If there's room in the transmit descriptor ring then queue
|
|
* some more transmit packets.
|
|
*/
|
|
|
|
if (!(sc->arpcom.ac_if.if_flags & IFF_OACTIVE))
|
|
lnc_start(&sc->arpcom.ac_if);
|
|
}
|
|
}
|
|
|
|
void
|
|
lncintr(int unit)
|
|
{
|
|
struct lnc_softc *sc = &lnc_softc[unit];
|
|
lncintr_sc (sc);
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline int
|
|
mbuf_to_buffer(struct mbuf *m, char *buffer)
|
|
{
|
|
|
|
int len=0;
|
|
|
|
for( ; m; m = m->m_next) {
|
|
bcopy(mtod(m, caddr_t), buffer, m->m_len);
|
|
buffer += m->m_len;
|
|
len += m->m_len;
|
|
}
|
|
|
|
return(len);
|
|
}
|
|
|
|
static inline struct mbuf *
|
|
chain_to_cluster(struct mbuf *m)
|
|
{
|
|
struct mbuf *new;
|
|
|
|
MGET(new, M_DONTWAIT, MT_DATA);
|
|
if (new) {
|
|
MCLGET(new, M_DONTWAIT);
|
|
if (new->m_ext.ext_buf) {
|
|
new->m_len = mbuf_to_buffer(m, new->m_data);
|
|
m_freem(m);
|
|
return(new);
|
|
} else
|
|
m_free(new);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* IFF_OACTIVE and IFF_RUNNING are checked in ether_output so it's redundant
|
|
* to check them again since we wouldn't have got here if they were not
|
|
* appropriately set. This is also called from lnc_init and lncintr but the
|
|
* flags should be ok at those points too.
|
|
*/
|
|
|
|
static void
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lnc_start(struct ifnet *ifp)
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{
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struct lnc_softc *sc = ifp->if_softc;
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struct host_ring_entry *desc;
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int tmp;
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int end_of_packet;
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struct mbuf *head, *m;
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int len, chunk;
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int addr;
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int no_entries_needed;
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do {
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IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, head);
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if (!head)
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return;
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if (sc->nic.mem_mode == DMA_MBUF) {
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no_entries_needed = 0;
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for (m=head; m; m = m->m_next)
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no_entries_needed++;
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/*
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* We try and avoid bcopy as much as possible
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* but there are two cases when we use it.
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*
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* 1) If there are not enough free entries in the ring
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* to hold each mbuf in the chain then compact the
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* chain into a single cluster.
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*
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* 2) The Am7990 and Am79C90 must not have less than
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* 100 bytes in the first descriptor of a chained
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* packet so it's necessary to shuffle the mbuf
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* contents to ensure this.
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*/
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if (no_entries_needed > (NDESC(sc->ntdre) - sc->pending_transmits))
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if (!(head = chain_to_cluster(head))) {
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log(LOG_ERR, "lnc%d: Couldn't get mbuf for transmit packet -- Resetting \n ",ifp->if_unit);
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lnc_reset(sc);
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return;
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}
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else if ((sc->nic.ic == LANCE) || (sc->nic.ic == C_LANCE)) {
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if ((head->m_len < 100) && (head->m_next)) {
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len = 100 - head->m_len;
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if (M_TRAILINGSPACE(head) < len) {
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/*
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* Move data to start of data
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* area. We assume the first
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* mbuf has a packet header
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* and is not a cluster.
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*/
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bcopy((caddr_t)head->m_data, (caddr_t)head->m_pktdat, head->m_len);
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head->m_data = head->m_pktdat;
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}
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m = head->m_next;
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while (m && (len > 0)) {
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chunk = min(len, m->m_len);
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bcopy(mtod(m, caddr_t), mtod(head, caddr_t) + head->m_len, chunk);
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len -= chunk;
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head->m_len += chunk;
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m->m_len -= chunk;
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m->m_data += chunk;
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if (m->m_len <= 0) {
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MFREE(m, head->m_next);
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m = head->m_next;
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}
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}
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}
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}
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tmp = sc->next_to_send;
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/*
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* On entering this loop we know that tmp points to a
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* descriptor with a clear OWN bit.
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*/
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desc = sc->trans_ring + tmp;
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len = ETHER_MIN_LEN;
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for (m = head; m; m = m->m_next) {
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desc->buff.mbuf = m;
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addr = kvtop(m->m_data);
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desc->md->md0 = addr;
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desc->md->md1 = ((addr >> 16) & 0xff);
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desc->md->md3 = 0;
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desc->md->md2 = -m->m_len;
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sc->pending_transmits++;
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len -= m->m_len;
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INC_MD_PTR(tmp, sc->ntdre)
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desc = sc->trans_ring + tmp;
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}
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end_of_packet = tmp;
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DEC_MD_PTR(tmp, sc->ntdre)
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desc = sc->trans_ring + tmp;
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desc->md->md1 |= ENP;
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if (len > 0)
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desc->md->md2 -= len;
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/*
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* Set OWN bits in reverse order, otherwise the Lance
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* could start sending the packet before all the
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* buffers have been relinquished by the host.
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*/
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while (tmp != sc->next_to_send) {
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desc->md->md1 |= OWN;
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DEC_MD_PTR(tmp, sc->ntdre)
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desc = sc->trans_ring + tmp;
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}
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sc->next_to_send = end_of_packet;
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desc->md->md1 |= STP | OWN;
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} else {
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sc->pending_transmits++;
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desc = sc->trans_ring + sc->next_to_send;
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len = mbuf_to_buffer(head, desc->buff.data);
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desc->md->md3 = 0;
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desc->md->md2 = -max(len, ETHER_MIN_LEN);
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desc->md->md1 |= OWN | STP | ENP;
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INC_MD_PTR(sc->next_to_send, sc->ntdre)
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}
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/* Force an immediate poll of the transmit ring */
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outw(sc->rdp, TDMD | INEA);
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/*
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* Set a timer so if the buggy Am7990.h shuts
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* down we can wake it up.
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*/
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ifp->if_timer = 2;
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#if NBPFILTER > 0
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if (sc->arpcom.ac_if.if_bpf)
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bpf_mtap(&sc->arpcom.ac_if, head);
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#endif
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if (sc->nic.mem_mode != DMA_MBUF)
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m_freem(head);
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} while (sc->pending_transmits < NDESC(sc->ntdre));
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/*
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* Transmit ring is full so set IFF_OACTIVE
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* since we can't buffer any more packets.
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*/
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sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
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LNCSTATS(trans_ring_full)
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}
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static int
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lnc_ioctl(struct ifnet * ifp, int command, caddr_t data)
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{
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struct lnc_softc *sc = ifp->if_softc;
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struct ifaddr *ifa = (struct ifaddr *) data;
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struct ifreq *ifr = (struct ifreq *) data;
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int s, error = 0;
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s = splimp();
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switch (command) {
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case SIOCSIFADDR:
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ifp->if_flags |= IFF_UP;
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switch (ifa->ifa_addr->sa_family) {
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#ifdef INET
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case AF_INET:
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lnc_init(sc);
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arp_ifinit((struct arpcom *)ifp, ifa);
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break;
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#endif
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default:
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lnc_init(sc);
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break;
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}
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break;
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case SIOCSIFFLAGS:
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#ifdef DEBUG
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if (ifp->if_flags & IFF_DEBUG)
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sc->lnc_debug = 1;
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else
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sc->lnc_debug = 0;
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#endif
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if (ifp->if_flags & IFF_PROMISC) {
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if (!(sc->nic.mode & PROM)) {
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sc->nic.mode |= PROM;
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lnc_init(sc);
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}
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} else if (sc->nic.mode & PROM) {
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sc->nic.mode &= ~PROM;
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lnc_init(sc);
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}
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if ((ifp->if_flags & IFF_UP) == 0 &&
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(ifp->if_flags & IFF_RUNNING) != 0) {
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/*
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* If interface is marked down and it is running,
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* then stop it.
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*/
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lnc_stop(sc);
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ifp->if_flags &= ~IFF_RUNNING;
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} else if ((ifp->if_flags & IFF_UP) != 0 &&
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(ifp->if_flags & IFF_RUNNING) == 0) {
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/*
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* If interface is marked up and it is stopped, then
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* start it.
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*/
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lnc_init(sc);
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}
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break;
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#ifdef LNC_MULTICAST
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case SIOCADDMULTI:
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case SIOCDELMULTI:
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error = (command == SIOCADDMULTI) ?
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ether_addmulti(ifr, &sc->arpcom) :
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ether_delmulti(ifr, &sc->arpcom);
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if (error == ENETRESET) {
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lnc_setladrf(sc);
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error = 0;
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}
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break;
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#endif
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case SIOCSIFMTU:
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/*
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* Set the interface MTU.
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*/
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if (ifr->ifr_mtu > ETHERMTU) {
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error = EINVAL;
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} else
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ifp->if_mtu = ifr->ifr_mtu;
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break;
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default:
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error = EINVAL;
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}
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(void) splx(s);
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return error;
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}
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static void
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lnc_watchdog(struct ifnet *ifp)
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{
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log(LOG_ERR, "lnc%d: Device timeout -- Resetting\n", ifp->if_unit);
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ifp->if_oerrors++;
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lnc_reset(ifp->if_softc);
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}
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#ifdef DEBUG
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static void
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lnc_dump_state(struct lnc_softc *sc)
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{
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int i;
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printf("\nDriver/NIC [%d] state dump\n", sc->arpcom.ac_if.if_unit);
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printf("Memory access mode: %b\n", sc->nic.mem_mode, MEM_MODES);
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printf("Host memory\n");
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printf("-----------\n");
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printf("Receive ring: base = %x, next = %x\n",
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sc->recv_ring, (sc->recv_ring + sc->recv_next));
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for (i = 0; i < NDESC(sc->nrdre); i++)
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printf("\t%d:%x md = %x buff = %x\n",
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i, sc->recv_ring + i, (sc->recv_ring + i)->md,
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(sc->recv_ring + i)->buff);
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printf("Transmit ring: base = %x, next = %x\n",
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sc->trans_ring, (sc->trans_ring + sc->trans_next));
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for (i = 0; i < NDESC(sc->ntdre); i++)
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printf("\t%d:%x md = %x buff = %x\n",
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i, sc->trans_ring + i, (sc->trans_ring + i)->md,
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(sc->trans_ring + i)->buff);
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printf("Lance memory (may be on host(DMA) or card(SHMEM))\n");
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printf("Init block = %x\n", sc->init_block);
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printf("\tmode = %b rlen:rdra = %x:%x tlen:tdra = %x:%x\n",
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sc->init_block->mode, INIT_MODE, sc->init_block->rlen,
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sc->init_block->rdra, sc->init_block->tlen, sc->init_block->tdra);
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printf("Receive descriptor ring\n");
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for (i = 0; i < NDESC(sc->nrdre); i++)
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printf("\t%d buffer = 0x%x%x, BCNT = %d,\tMCNT = %u,\tflags = %b\n",
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i, ((sc->recv_ring + i)->md->md1 & HADR),
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(sc->recv_ring + i)->md->md0,
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-(short) (sc->recv_ring + i)->md->md2,
|
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(sc->recv_ring + i)->md->md3,
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(((sc->recv_ring + i)->md->md1 & ~HADR) >> 8), RECV_MD1);
|
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printf("Transmit descriptor ring\n");
|
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for (i = 0; i < NDESC(sc->ntdre); i++)
|
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printf("\t%d buffer = 0x%x%x, BCNT = %d,\tflags = %b %b\n",
|
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i, ((sc->trans_ring + i)->md->md1 & HADR),
|
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(sc->trans_ring + i)->md->md0,
|
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-(short) (sc->trans_ring + i)->md->md2,
|
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((sc->trans_ring + i)->md->md1 >> 8), TRANS_MD1,
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((sc->trans_ring + i)->md->md3 >> 10), TRANS_MD3);
|
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printf("\nnext_to_send = %x\n", sc->next_to_send);
|
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printf("\n CSR0 = %b CSR1 = %x CSR2 = %x CSR3 = %x\n\n", read_csr(sc, CSR0), CSR0_FLAGS, read_csr(sc, CSR1), read_csr(sc, CSR2), read_csr(sc, CSR3));
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/* Set RAP back to CSR0 */
|
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outw(sc->rap, CSR0);
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}
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|
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static void
|
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mbuf_dump_chain(struct mbuf * m)
|
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{
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|
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#define MBUF_FLAGS \
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"\20\1M_EXT\2M_PKTHDR\3M_EOR\4UNKNOWN\5M_BCAST\6M_MCAST"
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if (!m)
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log(LOG_DEBUG, "m == NULL\n");
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do {
|
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log(LOG_DEBUG, "m = %x\n", m);
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log(LOG_DEBUG, "m_hdr.mh_next = %x\n", m->m_hdr.mh_next);
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log(LOG_DEBUG, "m_hdr.mh_nextpkt = %x\n", m->m_hdr.mh_nextpkt);
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log(LOG_DEBUG, "m_hdr.mh_len = %d\n", m->m_hdr.mh_len);
|
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log(LOG_DEBUG, "m_hdr.mh_data = %x\n", m->m_hdr.mh_data);
|
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log(LOG_DEBUG, "m_hdr.mh_type = %d\n", m->m_hdr.mh_type);
|
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log(LOG_DEBUG, "m_hdr.mh_flags = %b\n", m->m_hdr.mh_flags, MBUF_FLAGS);
|
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if (!(m->m_hdr.mh_flags & (M_PKTHDR | M_EXT)))
|
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log(LOG_DEBUG, "M_dat.M_databuf = %x\n", m->M_dat.M_databuf);
|
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else {
|
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if (m->m_hdr.mh_flags & M_PKTHDR) {
|
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log(LOG_DEBUG, "M_dat.MH.MH_pkthdr.len = %d\n", m->M_dat.MH.MH_pkthdr.len);
|
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log(LOG_DEBUG, "M_dat.MH.MH_pkthdr.rcvif = %x\n", m->M_dat.MH.MH_pkthdr.rcvif);
|
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if (!(m->m_hdr.mh_flags & M_EXT))
|
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log(LOG_DEBUG, "M_dat.MH.MH_dat.MH_databuf = %x\n", m->M_dat.MH.MH_dat.MH_databuf);
|
|
}
|
|
if (m->m_hdr.mh_flags & M_EXT) {
|
|
log(LOG_DEBUG, "M_dat.MH.MH_dat.MH_ext.ext_buff %x\n", m->M_dat.MH.MH_dat.MH_ext.ext_buf);
|
|
log(LOG_DEBUG, "M_dat.MH.MH_dat.MH_ext.ext_free %x\n", m->M_dat.MH.MH_dat.MH_ext.ext_free);
|
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log(LOG_DEBUG, "M_dat.MH.MH_dat.MH_ext.ext_size %d\n", m->M_dat.MH.MH_dat.MH_ext.ext_size);
|
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}
|
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}
|
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} while (m = m->m_next);
|
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}
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#endif
|
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|
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#endif
|