1707 lines
43 KiB
C
1707 lines
43 KiB
C
/* $NetBSD: if_lmc.c,v 1.20 2003/05/03 18:11:36 wiz Exp $ */
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/*-
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* Copyright (c) 1997-1999 LAN Media Corporation (LMC)
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* All rights reserved. www.lanmedia.com
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*
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* This code is written by Michael Graff <graff@vix.com> for LMC.
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* The code is derived from permitted modifications to software created
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* by Matt Thomas (matt@3am-software.com).
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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. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* 3. All marketing or advertising materials mentioning features or
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* use of this software must display the following acknowledgement:
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* This product includes software developed by LAN Media Corporation
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* and its contributors.
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* 4. Neither the name of LAN Media Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY LAN MEDIA CORPORATION AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1994-1997 Matt Thomas (matt@3am-software.com)
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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
|
||
* 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: if_lmc.c,v 1.20 2003/05/03 18:11:36 wiz Exp $");
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#include <sys/param.h>
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#include <sys/systm.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/malloc.h>
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#include <sys/kernel.h>
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#include <sys/proc.h> /* only for declaration of wakeup() used by vm.h */
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#if defined(__FreeBSD__)
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#include <machine/clock.h>
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#elif defined(__bsdi__) || defined(__NetBSD__)
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#include <sys/device.h>
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#endif
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#if defined(__NetBSD__)
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#include <dev/pci/pcidevs.h>
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#include "rnd.h"
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#if NRND > 0
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#include <sys/rnd.h>
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#endif
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#endif
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/if_dl.h>
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#include <net/netisr.h>
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#include "bpfilter.h"
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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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#if defined(__FreeBSD__)
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#include <net/if_sppp.h>
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#elif defined(__NetBSD__)
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#include <net/if_spppvar.h>
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#endif
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#if defined(__bsdi__)
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#if INET
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#endif
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#include <net/netisr.h>
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#include <net/if.h>
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#include <net/netisr.h>
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#include <net/if_types.h>
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#include <net/if_p2p.h>
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#include <net/if_c_hdlc.h>
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#endif
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#if defined(__NetBSD__)
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#include <uvm/uvm_extern.h>
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#endif
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#if defined(__FreeBSD__)
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <pci.h>
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#if NPCI > 0
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#include <pci/pcivar.h>
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#include <pci/dc21040reg.h>
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#endif
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#endif /* __FreeBSD__ */
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#if defined(__bsdi__)
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#include <vm/vm.h>
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#include <i386/pci/ic/dc21040.h>
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#include <i386/isa/isa.h>
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#include <i386/isa/icu.h>
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#include <i386/isa/dma.h>
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#include <i386/isa/isavar.h>
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#include <i386/pci/pci.h>
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#endif /* __bsdi__ */
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#if defined(__NetBSD__)
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#include <machine/bus.h>
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#if defined(__alpha__)
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#include <machine/intr.h>
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#endif
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/ic/dc21040reg.h>
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#endif /* __NetBSD__ */
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/*
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* Sigh. Every OS puts these in different places.
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*/
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#if defined(__NetBSD__)
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#include <dev/pci/if_lmc_types.h>
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#include <dev/pci/if_lmcioctl.h>
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#include <dev/pci/if_lmcvar.h>
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#elif defined(__FreeBSD__)
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#include "pci/if_lmc_types.h"
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#include "pci/if_lmcioctl.h"
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#include "pci/if_lmcvar.h"
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#else /* BSDI */
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#include "i386/pci/if_lmctypes.h"
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#include "i386/pci/if_lmcioctl.h"
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#include "i386/pci/if_lmcvar.h"
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#endif
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/*
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* This module supports
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* the DEC 21140A pass 2.2 PCI Fast Ethernet Controller.
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*/
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static ifnet_ret_t lmc_ifstart_one(struct ifnet *ifp);
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static ifnet_ret_t lmc_ifstart(struct ifnet *ifp);
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static struct mbuf *lmc_txput(lmc_softc_t * const sc, struct mbuf *m);
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static void lmc_rx_intr(lmc_softc_t * const sc);
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#if defined(__NetBSD__) || defined(__FreeBSD__)
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static void lmc_watchdog(struct ifnet *ifp);
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#endif
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#if defined(__bsdi__)
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static int lmc_watchdog(int);
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#endif
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static void lmc_ifup(lmc_softc_t * const sc);
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static void lmc_ifdown(lmc_softc_t * const sc);
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/*
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* Code the read the SROM and MII bit streams (I2C)
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*/
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static inline void
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lmc_delay_300ns(lmc_softc_t * const sc)
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{
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int idx;
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for (idx = (300 / 33) + 1; idx > 0; idx--)
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(void)LMC_CSR_READ(sc, csr_busmode);
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}
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#define EMIT \
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do { \
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LMC_CSR_WRITE(sc, csr_srom_mii, csr); \
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lmc_delay_300ns(sc); \
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} while (0)
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static inline void
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lmc_srom_idle(lmc_softc_t * const sc)
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{
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unsigned bit, csr;
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csr = SROMSEL ; EMIT;
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csr = SROMSEL | SROMRD; EMIT;
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csr ^= SROMCS; EMIT;
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csr ^= SROMCLKON; EMIT;
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/*
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* Write 25 cycles of 0 which will force the SROM to be idle.
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*/
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for (bit = 3 + SROM_BITWIDTH + 16; bit > 0; bit--) {
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csr ^= SROMCLKOFF; EMIT; /* clock low; data not valid */
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csr ^= SROMCLKON; EMIT; /* clock high; data valid */
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}
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csr ^= SROMCLKOFF; EMIT;
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csr ^= SROMCS; EMIT;
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csr = 0; EMIT;
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}
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static void
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lmc_srom_read(lmc_softc_t * const sc)
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{
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unsigned idx;
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const unsigned bitwidth = SROM_BITWIDTH;
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const unsigned cmdmask = (SROMCMD_RD << bitwidth);
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const unsigned msb = 1 << (bitwidth + 3 - 1);
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unsigned lastidx = (1 << bitwidth) - 1;
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lmc_srom_idle(sc);
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for (idx = 0; idx <= lastidx; idx++) {
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unsigned lastbit, data, bits, bit, csr;
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csr = SROMSEL ; EMIT;
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csr = SROMSEL | SROMRD; EMIT;
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csr ^= SROMCSON; EMIT;
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csr ^= SROMCLKON; EMIT;
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lastbit = 0;
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for (bits = idx|cmdmask, bit = bitwidth + 3
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; bit > 0
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; bit--, bits <<= 1) {
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const unsigned thisbit = bits & msb;
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csr ^= SROMCLKOFF; EMIT; /* clock L data invalid */
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if (thisbit != lastbit) {
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csr ^= SROMDOUT; EMIT;/* clock L invert data */
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} else {
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EMIT;
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}
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csr ^= SROMCLKON; EMIT; /* clock H data valid */
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lastbit = thisbit;
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}
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csr ^= SROMCLKOFF; EMIT;
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for (data = 0, bits = 0; bits < 16; bits++) {
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data <<= 1;
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csr ^= SROMCLKON; EMIT; /* clock H data valid */
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data |= LMC_CSR_READ(sc, csr_srom_mii) & SROMDIN ? 1 : 0;
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csr ^= SROMCLKOFF; EMIT; /* clock L data invalid */
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}
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sc->lmc_rombuf[idx*2] = data & 0xFF;
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sc->lmc_rombuf[idx*2+1] = data >> 8;
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csr = SROMSEL | SROMRD; EMIT;
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csr = 0; EMIT;
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}
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lmc_srom_idle(sc);
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}
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#define MII_EMIT do { LMC_CSR_WRITE(sc, csr_srom_mii, csr); lmc_delay_300ns(sc); } while (0)
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static inline void
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lmc_mii_writebits(lmc_softc_t * const sc, unsigned data, unsigned bits)
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{
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unsigned msb = 1 << (bits - 1);
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unsigned csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
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unsigned lastbit = (csr & MII_DOUT) ? msb : 0;
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csr |= MII_WR; MII_EMIT; /* clock low; assert write */
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for (; bits > 0; bits--, data <<= 1) {
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const unsigned thisbit = data & msb;
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if (thisbit != lastbit) {
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csr ^= MII_DOUT; MII_EMIT; /* clock low; invert data */
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}
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csr ^= MII_CLKON; MII_EMIT; /* clock high; data valid */
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lastbit = thisbit;
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csr ^= MII_CLKOFF; MII_EMIT; /* clock low; data not valid */
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}
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}
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static void
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lmc_mii_turnaround(lmc_softc_t * const sc, u_int32_t cmd)
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{
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u_int32_t csr;
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csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
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if (cmd == MII_WRCMD) {
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csr |= MII_DOUT; MII_EMIT; /* clock low; change data */
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csr ^= MII_CLKON; MII_EMIT; /* clock high; data valid */
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csr ^= MII_CLKOFF; MII_EMIT; /* clock low; data not valid */
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csr ^= MII_DOUT; MII_EMIT; /* clock low; change data */
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} else {
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csr |= MII_RD; MII_EMIT; /* clock low; switch to read */
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}
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csr ^= MII_CLKON; MII_EMIT; /* clock high; data valid */
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csr ^= MII_CLKOFF; MII_EMIT; /* clock low; data not valid */
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}
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static u_int32_t
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lmc_mii_readbits(lmc_softc_t * const sc)
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{
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u_int32_t data;
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u_int32_t csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
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int idx;
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for (idx = 0, data = 0; idx < 16; idx++) {
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data <<= 1; /* this is NOOP on the first pass through */
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csr ^= MII_CLKON; MII_EMIT; /* clock high; data valid */
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if (LMC_CSR_READ(sc, csr_srom_mii) & MII_DIN)
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data |= 1;
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csr ^= MII_CLKOFF; MII_EMIT; /* clock low; data not valid */
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}
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csr ^= MII_RD; MII_EMIT; /* clock low; turn off read */
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return data;
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}
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u_int32_t
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lmc_mii_readreg(lmc_softc_t * const sc, u_int32_t devaddr, u_int32_t regno)
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{
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u_int32_t csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
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u_int32_t data;
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csr &= ~(MII_RD|MII_CLK); MII_EMIT;
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lmc_mii_writebits(sc, MII_PREAMBLE, 32);
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lmc_mii_writebits(sc, MII_RDCMD, 8);
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lmc_mii_writebits(sc, devaddr, 5);
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lmc_mii_writebits(sc, regno, 5);
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lmc_mii_turnaround(sc, MII_RDCMD);
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data = lmc_mii_readbits(sc);
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return (data);
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}
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void
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lmc_mii_writereg(lmc_softc_t * const sc, u_int32_t devaddr,
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u_int32_t regno, u_int32_t data)
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{
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u_int32_t csr;
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csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
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csr &= ~(MII_RD|MII_CLK); MII_EMIT;
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lmc_mii_writebits(sc, MII_PREAMBLE, 32);
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lmc_mii_writebits(sc, MII_WRCMD, 8);
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lmc_mii_writebits(sc, devaddr, 5);
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||
lmc_mii_writebits(sc, regno, 5);
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||
lmc_mii_turnaround(sc, MII_WRCMD);
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||
lmc_mii_writebits(sc, data, 16);
|
||
}
|
||
|
||
int
|
||
lmc_read_macaddr(lmc_softc_t * const sc)
|
||
{
|
||
lmc_srom_read(sc);
|
||
|
||
memcpy(sc->lmc_enaddr, sc->lmc_rombuf + 20, 6);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Check to make certain there is a signal from the modem, and flicker
|
||
* lights as needed.
|
||
*/
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
static void
|
||
lmc_watchdog(struct ifnet *ifp)
|
||
#endif
|
||
#if defined(__bsdi__)
|
||
static int
|
||
lmc_watchdog(int unit)
|
||
#endif
|
||
{
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
|
||
#endif
|
||
#if defined(__bsdi__)
|
||
lmc_softc_t * const sc = LMC_UNIT_TO_SOFTC(unit);
|
||
struct ifnet *ifp = &sc->lmc_if;
|
||
#endif
|
||
u_int32_t ostatus;
|
||
u_int32_t link_status;
|
||
u_int32_t ticks;
|
||
|
||
/*
|
||
* Make sure the tx jabber and rx watchdog are off,
|
||
* and the transmit and receive processes are running.
|
||
*/
|
||
LMC_CSR_WRITE (sc, csr_15, 0x00000011);
|
||
sc->lmc_cmdmode |= TULIP_CMD_TXRUN | TULIP_CMD_RXRUN;
|
||
LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
|
||
|
||
/* Is the transmit clock still available? */
|
||
ticks = LMC_CSR_READ (sc, csr_gp_timer);
|
||
ticks = 0x0000ffff - (ticks & 0x0000ffff);
|
||
if (ticks == 0)
|
||
{
|
||
/* no clock found ? */
|
||
if (sc->tx_clockState != 0)
|
||
{
|
||
sc->tx_clockState = 0;
|
||
if (sc->lmc_cardtype == LMC_CARDTYPE_SSI)
|
||
lmc_led_on (sc, LMC_MII16_LED3); /* ON red */
|
||
}
|
||
else
|
||
if (sc->tx_clockState == 0)
|
||
{
|
||
sc->tx_clockState = 1;
|
||
if (sc->lmc_cardtype == LMC_CARDTYPE_SSI)
|
||
lmc_led_off (sc, LMC_MII16_LED3); /* OFF red */
|
||
}
|
||
}
|
||
|
||
link_status = sc->lmc_media->get_link_status(sc);
|
||
ostatus = ((sc->lmc_flags & LMC_MODEMOK) == LMC_MODEMOK);
|
||
|
||
/*
|
||
* hardware level link lost, but the interface is marked as up.
|
||
* Mark it as down.
|
||
*/
|
||
if (link_status == LMC_LINK_DOWN && ostatus) {
|
||
printf(LMC_PRINTF_FMT ": physical link down\n",
|
||
LMC_PRINTF_ARGS);
|
||
sc->lmc_flags &= ~LMC_MODEMOK;
|
||
if (sc->lmc_cardtype == LMC_CARDTYPE_DS3 ||
|
||
sc->lmc_cardtype == LMC_CARDTYPE_T1)
|
||
lmc_led_on (sc, LMC_DS3_LED3 | LMC_DS3_LED2);
|
||
/* turn on red LED */
|
||
else {
|
||
lmc_led_off (sc, LMC_MII16_LED1);
|
||
lmc_led_on (sc, LMC_MII16_LED0);
|
||
if (sc->lmc_timing == LMC_CTL_CLOCK_SOURCE_EXT)
|
||
lmc_led_on (sc, LMC_MII16_LED3);
|
||
}
|
||
|
||
}
|
||
|
||
/*
|
||
* hardware link is up, but the interface is marked as down.
|
||
* Bring it back up again.
|
||
*/
|
||
if (link_status != LMC_LINK_DOWN && !ostatus) {
|
||
printf(LMC_PRINTF_FMT ": physical link up\n",
|
||
LMC_PRINTF_ARGS);
|
||
if (sc->lmc_flags & LMC_IFUP) {
|
||
lmc_ifup(sc);
|
||
#if 0 && (defined(__NetBSD__) || defined(__FreeBSD__))
|
||
if (sc->lmc_if.if_flags & IFF_UP) {
|
||
struct sppp *sp = &sc->lmc_sppp;
|
||
|
||
/* re-connect LCP */
|
||
(sp->pp_down)(sp);
|
||
(sp->pp_up)(sp);
|
||
}
|
||
#endif
|
||
}
|
||
sc->lmc_flags |= LMC_MODEMOK;
|
||
if (sc->lmc_cardtype == LMC_CARDTYPE_DS3 ||
|
||
sc->lmc_cardtype == LMC_CARDTYPE_T1)
|
||
{
|
||
sc->lmc_miireg16 |= LMC_DS3_LED3;
|
||
lmc_led_off (sc, LMC_DS3_LED3);
|
||
/* turn off red LED */
|
||
lmc_led_on (sc, LMC_DS3_LED2);
|
||
} else {
|
||
lmc_led_on (sc, LMC_MII16_LED0 | LMC_MII16_LED1
|
||
| LMC_MII16_LED2);
|
||
if (sc->lmc_timing != LMC_CTL_CLOCK_SOURCE_EXT)
|
||
lmc_led_off (sc, LMC_MII16_LED3);
|
||
}
|
||
|
||
return;
|
||
}
|
||
|
||
/* Call media specific watchdog functions */
|
||
sc->lmc_media->watchdog(sc);
|
||
|
||
/*
|
||
* remember the timer value
|
||
*/
|
||
ticks = LMC_CSR_READ(sc, csr_gp_timer);
|
||
LMC_CSR_WRITE(sc, csr_gp_timer, 0xffffffffUL);
|
||
sc->ictl.ticks = 0x0000ffff - (ticks & 0x0000ffff);
|
||
|
||
ifp->if_timer = 1;
|
||
}
|
||
|
||
/*
|
||
* Mark the interface as "up" and enable TX/RX and TX/RX interrupts.
|
||
* This also does a full software reset.
|
||
*/
|
||
static void
|
||
lmc_ifup(lmc_softc_t * const sc)
|
||
{
|
||
sc->lmc_if.if_timer = 0;
|
||
|
||
lmc_dec_reset(sc);
|
||
lmc_reset(sc);
|
||
|
||
sc->lmc_media->set_link_status(sc, LMC_LINK_UP);
|
||
sc->lmc_media->set_status(sc, NULL);
|
||
|
||
sc->lmc_flags |= LMC_IFUP;
|
||
|
||
/*
|
||
* for DS3 & DS1 adapters light the green light, led2
|
||
*/
|
||
if (sc->lmc_cardtype == LMC_CARDTYPE_DS3 ||
|
||
sc->lmc_cardtype == LMC_CARDTYPE_T1)
|
||
lmc_led_on (sc, LMC_MII16_LED2);
|
||
else
|
||
lmc_led_on (sc, LMC_MII16_LED0 | LMC_MII16_LED2);
|
||
|
||
/*
|
||
* select what interrupts we want to get
|
||
*/
|
||
sc->lmc_intrmask |= (TULIP_STS_NORMALINTR
|
||
| TULIP_STS_RXINTR
|
||
| TULIP_STS_RXNOBUF
|
||
| TULIP_STS_TXINTR
|
||
| TULIP_STS_ABNRMLINTR
|
||
| TULIP_STS_SYSERROR
|
||
| TULIP_STS_TXSTOPPED
|
||
| TULIP_STS_TXUNDERFLOW
|
||
| TULIP_STS_RXSTOPPED
|
||
);
|
||
LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask);
|
||
|
||
sc->lmc_cmdmode |= TULIP_CMD_TXRUN;
|
||
sc->lmc_cmdmode |= TULIP_CMD_RXRUN;
|
||
LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
|
||
|
||
sc->lmc_if.if_timer = 1;
|
||
}
|
||
|
||
/*
|
||
* Mark the interface as "down" and disable TX/RX and TX/RX interrupts.
|
||
* This is done by performing a full reset on the interface.
|
||
*/
|
||
static void
|
||
lmc_ifdown(lmc_softc_t * const sc)
|
||
{
|
||
|
||
#if 0 && (defined(__NetBSD__) || defined(__FreeBSD__))
|
||
if (sc->lmc_if.if_flags & IFF_UP) {
|
||
struct sppp *sp = &sc->lmc_sppp;
|
||
|
||
/* disconnect LCP */
|
||
(sp->pp_down)(sp);
|
||
}
|
||
#endif
|
||
|
||
sc->lmc_if.if_timer = 0;
|
||
sc->lmc_flags &= ~LMC_IFUP;
|
||
|
||
sc->lmc_media->set_link_status(sc, LMC_LINK_DOWN);
|
||
lmc_led_off(sc, LMC_MII16_LED_ALL);
|
||
|
||
lmc_dec_reset(sc);
|
||
lmc_reset(sc);
|
||
sc->lmc_media->set_status(sc, NULL);
|
||
}
|
||
|
||
static void
|
||
lmc_rx_intr(lmc_softc_t * const sc)
|
||
{
|
||
lmc_ringinfo_t * const ri = &sc->lmc_rxinfo;
|
||
struct ifnet * const ifp = &sc->lmc_if;
|
||
u_int32_t status;
|
||
int fillok = 1;
|
||
|
||
sc->lmc_rxtick++;
|
||
|
||
for (;;) {
|
||
lmc_desc_t *eop = ri->ri_nextin;
|
||
int total_len = 0, last_offset = 0;
|
||
struct mbuf *ms = NULL, *me = NULL;
|
||
int accept = 0;
|
||
#if defined(LMC_BUS_DMA) && !defined(LMC_BUS_DMA_NORX)
|
||
bus_dmamap_t map;
|
||
int error;
|
||
#endif
|
||
|
||
if (fillok && sc->lmc_rxq.ifq_len < LMC_RXQ_TARGET)
|
||
goto queue_mbuf;
|
||
|
||
/*
|
||
* If the TULIP has no descriptors, there can't be any receive
|
||
* descriptors to process.
|
||
*/
|
||
if (eop == ri->ri_nextout)
|
||
break;
|
||
|
||
/*
|
||
* 90% of the packets will fit in one descriptor. So we
|
||
* optimize for that case.
|
||
*/
|
||
LMC_RXDESC_POSTSYNC(sc, eop, sizeof(*eop));
|
||
status = le32toh(((volatile lmc_desc_t *) eop)->d_status);
|
||
if ((status &
|
||
(TULIP_DSTS_OWNER|TULIP_DSTS_RxFIRSTDESC|TULIP_DSTS_RxLASTDESC)) ==
|
||
(TULIP_DSTS_RxFIRSTDESC|TULIP_DSTS_RxLASTDESC)) {
|
||
IF_DEQUEUE(&sc->lmc_rxq, ms);
|
||
me = ms;
|
||
} else {
|
||
/*
|
||
* If still owned by the TULIP, don't touch it.
|
||
*/
|
||
if (status & TULIP_DSTS_OWNER)
|
||
break;
|
||
|
||
/*
|
||
* It is possible (though improbable unless the
|
||
* BIG_PACKET support is enabled or MCLBYTES < 1518)
|
||
* for a received packet to cross more than one
|
||
* receive descriptor.
|
||
*/
|
||
while ((status & TULIP_DSTS_RxLASTDESC) == 0) {
|
||
if (++eop == ri->ri_last)
|
||
eop = ri->ri_first;
|
||
LMC_RXDESC_POSTSYNC(sc, eop, sizeof(*eop));
|
||
status = le32toh(((volatile lmc_desc_t *)
|
||
eop)->d_status);
|
||
if (eop == ri->ri_nextout ||
|
||
(status & TULIP_DSTS_OWNER)) {
|
||
return;
|
||
}
|
||
total_len++;
|
||
}
|
||
|
||
/*
|
||
* Dequeue the first buffer for the start of the
|
||
* packet. Hopefully this will be the only one we
|
||
* need to dequeue. However, if the packet consumed
|
||
* multiple descriptors, then we need to dequeue
|
||
* those buffers and chain to the starting mbuf.
|
||
* All buffers but the last buffer have the same
|
||
* length so we can set that now. (we add to
|
||
* last_offset instead of multiplying since we
|
||
* normally won't go into the loop and thereby
|
||
* saving a ourselves from doing a multiplication
|
||
* by 0 in the normal case).
|
||
*/
|
||
IF_DEQUEUE(&sc->lmc_rxq, ms);
|
||
for (me = ms; total_len > 0; total_len--) {
|
||
#if defined(LMC_BUS_DMA) && !defined(LMC_BUS_DMA_NORX)
|
||
map = M_GETCTX(me, bus_dmamap_t);
|
||
LMC_RXMAP_POSTSYNC(sc, map);
|
||
bus_dmamap_unload(sc->lmc_dmatag, map);
|
||
sc->lmc_rxmaps[sc->lmc_rxmaps_free++] = map;
|
||
#if defined(DIAGNOSTIC)
|
||
M_SETCTX(me, NULL);
|
||
#endif
|
||
#endif /* LMC_BUS_DMA */
|
||
me->m_len = LMC_RX_BUFLEN;
|
||
last_offset += LMC_RX_BUFLEN;
|
||
IF_DEQUEUE(&sc->lmc_rxq, me->m_next);
|
||
me = me->m_next;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Now get the size of received packet (minus the CRC).
|
||
*/
|
||
total_len = ((status >> 16) & 0x7FFF);
|
||
if (sc->ictl.crc_length == 16)
|
||
total_len -= 2;
|
||
else
|
||
total_len -= 4;
|
||
|
||
if ((sc->lmc_flags & LMC_RXIGNORE) == 0
|
||
&& ((status & LMC_DSTS_ERRSUM) == 0
|
||
#ifdef BIG_PACKET
|
||
|| (total_len <= sc->lmc_if.if_mtu + PPP_HEADER_LEN
|
||
&& (status & TULIP_DSTS_RxOVERFLOW) == 0)
|
||
#endif
|
||
)) {
|
||
|
||
#if defined(LMC_BUS_DMA) && !defined(LMC_BUS_DMA_NORX)
|
||
map = M_GETCTX(me, bus_dmamap_t);
|
||
bus_dmamap_sync(sc->lmc_dmatag, map, 0, me->m_len,
|
||
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
|
||
bus_dmamap_unload(sc->lmc_dmatag, map);
|
||
sc->lmc_rxmaps[sc->lmc_rxmaps_free++] = map;
|
||
#if defined(DIAGNOSTIC)
|
||
M_SETCTX(me, NULL);
|
||
#endif
|
||
#endif /* LMC_BUS_DMA */
|
||
|
||
me->m_len = total_len - last_offset;
|
||
#if NBPFILTER > 0
|
||
if (sc->lmc_bpf != NULL) {
|
||
if (me == ms)
|
||
LMC_BPF_TAP(sc, mtod(ms, caddr_t), total_len);
|
||
else
|
||
LMC_BPF_MTAP(sc, ms);
|
||
}
|
||
#endif
|
||
sc->lmc_flags |= LMC_RXACT;
|
||
accept = 1;
|
||
} else {
|
||
ifp->if_ierrors++;
|
||
if (status & TULIP_DSTS_RxOVERFLOW) {
|
||
sc->lmc_dot3stats.dot3StatsInternalMacReceiveErrors++;
|
||
}
|
||
#if defined(LMC_BUS_DMA) && !defined(LMC_BUS_DMA_NORX)
|
||
map = M_GETCTX(me, bus_dmamap_t);
|
||
bus_dmamap_unload(sc->lmc_dmatag, map);
|
||
sc->lmc_rxmaps[sc->lmc_rxmaps_free++] = map;
|
||
#if defined(DIAGNOSTIC)
|
||
M_SETCTX(me, NULL);
|
||
#endif
|
||
#endif /* LMC_BUS_DMA */
|
||
}
|
||
|
||
ifp->if_ipackets++;
|
||
if (++eop == ri->ri_last)
|
||
eop = ri->ri_first;
|
||
ri->ri_nextin = eop;
|
||
|
||
queue_mbuf:
|
||
/*
|
||
* Either we are priming the TULIP with mbufs (m == NULL)
|
||
* or we are about to accept an mbuf for the upper layers
|
||
* so we need to allocate an mbuf to replace it. If we
|
||
* can't replace it, send up it anyways. This may cause
|
||
* us to drop packets in the future but that's better than
|
||
* being caught in livelock.
|
||
*
|
||
* Note that if this packet crossed multiple descriptors
|
||
* we don't even try to reallocate all the mbufs here.
|
||
* Instead we rely on the test of the beginning of
|
||
* the loop to refill for the extra consumed mbufs.
|
||
*/
|
||
if (accept || ms == NULL) {
|
||
struct mbuf *m0;
|
||
MGETHDR(m0, M_DONTWAIT, MT_DATA);
|
||
if (m0 != NULL) {
|
||
MCLGET(m0, M_DONTWAIT);
|
||
if ((m0->m_flags & M_EXT) == 0) {
|
||
m_freem(m0);
|
||
m0 = NULL;
|
||
}
|
||
}
|
||
if (accept) {
|
||
ms->m_pkthdr.len = total_len;
|
||
ms->m_pkthdr.rcvif = ifp;
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
sppp_input(ifp, ms);
|
||
#endif
|
||
#if defined(__bsdi__)
|
||
sc->lmc_p2pcom.p2p_input(&sc->lmc_p2pcom, ms);
|
||
#endif
|
||
}
|
||
ms = m0;
|
||
}
|
||
if (ms == NULL) {
|
||
/*
|
||
* Couldn't allocate a new buffer. Don't bother
|
||
* trying to replenish the receive queue.
|
||
*/
|
||
fillok = 0;
|
||
sc->lmc_flags |= LMC_RXBUFSLOW;
|
||
continue;
|
||
}
|
||
/*
|
||
* Now give the buffer(s) to the TULIP and save in our
|
||
* receive queue.
|
||
*/
|
||
do {
|
||
u_int32_t ctl;
|
||
#if defined(LMC_BUS_DMA) && !defined(LMC_BUS_DMA_NORX)
|
||
lmc_desc_t * const nextout = ri->ri_nextout;
|
||
|
||
if (sc->lmc_rxmaps_free > 0) {
|
||
map = sc->lmc_rxmaps[--sc->lmc_rxmaps_free];
|
||
} else {
|
||
m_freem(ms);
|
||
sc->lmc_flags |= LMC_RXBUFSLOW;
|
||
#if defined(LMC_DEBUG)
|
||
sc->lmc_dbg.dbg_rxlowbufs++;
|
||
#endif
|
||
break;
|
||
}
|
||
M_SETCTX(ms, map);
|
||
error = bus_dmamap_load(sc->lmc_dmatag, map,
|
||
mtod(ms, void *), LMC_RX_BUFLEN,
|
||
NULL, BUS_DMA_NOWAIT);
|
||
if (error) {
|
||
printf(LMC_PRINTF_FMT
|
||
": unable to load rx map, "
|
||
"error = %d\n",
|
||
LMC_PRINTF_ARGS, error);
|
||
panic("lmc_rx_intr"); /* XXX */
|
||
}
|
||
|
||
ctl = le32toh(nextout->d_ctl);
|
||
/* For some weird reason we lose TULIP_DFLAG_ENDRING */
|
||
if ((nextout+1) == ri->ri_last)
|
||
ctl = LMC_CTL(LMC_CTL_FLGS(ctl)|
|
||
TULIP_DFLAG_ENDRING, 0, 0);
|
||
nextout->d_addr1 = htole32(map->dm_segs[0].ds_addr);
|
||
if (map->dm_nsegs == 2) {
|
||
nextout->d_addr2 = htole32(map->dm_segs[1].ds_addr);
|
||
nextout->d_ctl =
|
||
htole32(LMC_CTL(LMC_CTL_FLGS(ctl),
|
||
map->dm_segs[0].ds_len,
|
||
map->dm_segs[1].ds_len));
|
||
} else {
|
||
nextout->d_addr2 = 0;
|
||
nextout->d_ctl =
|
||
htole32(LMC_CTL(LMC_CTL_FLGS(ctl),
|
||
map->dm_segs[0].ds_len, 0));
|
||
}
|
||
LMC_RXDESC_POSTSYNC(sc, nextout, sizeof(*nextout));
|
||
#else /* LMC_BUS_DMA */
|
||
ctl = le32toh(ri->ri_nextout->d_ctl);
|
||
ri->ri_nextout->d_addr1 = htole32(LMC_KVATOPHYS(sc,
|
||
mtod(ms, caddr_t)));
|
||
ri->ri_nextout->d_ctl = htole32(LMC_CTL(LMC_CTL_FLGS(ctl),
|
||
LMC_RX_BUFLEN, 0));
|
||
#endif /* LMC_BUS_DMA */
|
||
ri->ri_nextout->d_status = htole32(TULIP_DSTS_OWNER);
|
||
LMC_RXDESC_POSTSYNC(sc, nextout, sizeof(u_int32_t));
|
||
if (++ri->ri_nextout == ri->ri_last)
|
||
ri->ri_nextout = ri->ri_first;
|
||
me = ms->m_next;
|
||
ms->m_next = NULL;
|
||
IF_ENQUEUE(&sc->lmc_rxq, ms);
|
||
} while ((ms = me) != NULL);
|
||
|
||
if (sc->lmc_rxq.ifq_len >= LMC_RXQ_TARGET)
|
||
sc->lmc_flags &= ~LMC_RXBUFSLOW;
|
||
}
|
||
}
|
||
|
||
static int
|
||
lmc_tx_intr(lmc_softc_t * const sc)
|
||
{
|
||
lmc_ringinfo_t * const ri = &sc->lmc_txinfo;
|
||
struct mbuf *m;
|
||
int xmits = 0;
|
||
int descs = 0;
|
||
u_int32_t d_status;
|
||
|
||
sc->lmc_txtick++;
|
||
|
||
while (ri->ri_free < ri->ri_max) {
|
||
u_int32_t flag;
|
||
|
||
LMC_TXDESC_POSTSYNC(sc, ri->ri_nextin, sizeof(*ri->ri_nextin));
|
||
d_status = le32toh(((volatile lmc_desc_t *) ri->ri_nextin)->d_status);
|
||
if (d_status & TULIP_DSTS_OWNER)
|
||
break;
|
||
|
||
flag = LMC_CTL_FLGS(le32toh(ri->ri_nextin->d_ctl));
|
||
if (flag & TULIP_DFLAG_TxLASTSEG) {
|
||
IF_DEQUEUE(&sc->lmc_txq, m);
|
||
if (m != NULL) {
|
||
#if defined(LMC_BUS_DMA) && !defined(LMC_BUS_DMA_NOTX)
|
||
bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t);
|
||
LMC_TXMAP_POSTSYNC(sc, map);
|
||
sc->lmc_txmaps[sc->lmc_txmaps_free++] = map;
|
||
#endif /* LMC_BUS_DMA */
|
||
#if NBPFILTER > 0
|
||
if (sc->lmc_bpf != NULL)
|
||
LMC_BPF_MTAP(sc, m);
|
||
#endif
|
||
m_freem(m);
|
||
#if defined(LMC_DEBUG)
|
||
} else {
|
||
printf(LMC_PRINTF_FMT ": tx_intr: failed to dequeue mbuf?!?\n", LMC_PRINTF_ARGS);
|
||
#endif
|
||
}
|
||
xmits++;
|
||
if (d_status & LMC_DSTS_ERRSUM) {
|
||
sc->lmc_if.if_oerrors++;
|
||
if (d_status & TULIP_DSTS_TxUNDERFLOW) {
|
||
sc->lmc_dot3stats.dot3StatsInternalTransmitUnderflows++;
|
||
}
|
||
} else {
|
||
if (d_status & TULIP_DSTS_TxDEFERRED) {
|
||
sc->lmc_dot3stats.dot3StatsDeferredTransmissions++;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (++ri->ri_nextin == ri->ri_last)
|
||
ri->ri_nextin = ri->ri_first;
|
||
|
||
ri->ri_free++;
|
||
descs++;
|
||
sc->lmc_if.if_flags &= ~IFF_OACTIVE;
|
||
}
|
||
/*
|
||
* If nothing left to transmit, disable the timer.
|
||
* Else if progress, reset the timer back to 2 ticks.
|
||
*/
|
||
sc->lmc_if.if_opackets += xmits;
|
||
|
||
return descs;
|
||
}
|
||
|
||
static void
|
||
lmc_print_abnormal_interrupt (lmc_softc_t * const sc, u_int32_t csr)
|
||
{
|
||
printf(LMC_PRINTF_FMT ": Abnormal interrupt\n", LMC_PRINTF_ARGS);
|
||
}
|
||
|
||
static void
|
||
lmc_intr_handler(lmc_softc_t * const sc, int *progress_p)
|
||
{
|
||
u_int32_t csr;
|
||
|
||
while ((csr = LMC_CSR_READ(sc, csr_status)) & sc->lmc_intrmask) {
|
||
|
||
#if defined(__NetBSD__)
|
||
#if NRND > 0
|
||
rnd_add_uint32(&sc->lmc_rndsource, csr);
|
||
#endif
|
||
#endif
|
||
|
||
*progress_p = 1;
|
||
LMC_CSR_WRITE(sc, csr_status, csr);
|
||
|
||
if (csr & TULIP_STS_SYSERROR) {
|
||
sc->lmc_last_system_error = (csr & TULIP_STS_ERRORMASK) >> TULIP_STS_ERR_SHIFT;
|
||
if (sc->lmc_flags & LMC_NOMESSAGES) {
|
||
sc->lmc_flags |= LMC_SYSTEMERROR;
|
||
} else {
|
||
printf(LMC_PRINTF_FMT ": system error: %s\n",
|
||
LMC_PRINTF_ARGS,
|
||
lmc_system_errors[sc->lmc_last_system_error]);
|
||
}
|
||
sc->lmc_flags |= LMC_NEEDRESET;
|
||
sc->lmc_system_errors++;
|
||
break;
|
||
}
|
||
if (csr & (TULIP_STS_RXINTR | TULIP_STS_RXNOBUF)) {
|
||
u_int32_t misses = LMC_CSR_READ(sc, csr_missed_frames);
|
||
if (csr & TULIP_STS_RXNOBUF)
|
||
sc->lmc_dot3stats.dot3StatsMissedFrames += misses & 0xFFFF;
|
||
/*
|
||
* Pass 2.[012] of the 21140A-A[CDE] may hang and/or corrupt data
|
||
* on receive overflows.
|
||
*/
|
||
if ((misses & 0x0FFE0000) && (sc->lmc_features & LMC_HAVE_RXBADOVRFLW)) {
|
||
sc->lmc_dot3stats.dot3StatsInternalMacReceiveErrors++;
|
||
/*
|
||
* Stop the receiver process and spin until it's stopped.
|
||
* Tell rx_intr to drop the packets it dequeues.
|
||
*/
|
||
LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode & ~TULIP_CMD_RXRUN);
|
||
while ((LMC_CSR_READ(sc, csr_status) & TULIP_STS_RXSTOPPED) == 0)
|
||
;
|
||
LMC_CSR_WRITE(sc, csr_status, TULIP_STS_RXSTOPPED);
|
||
sc->lmc_flags |= LMC_RXIGNORE;
|
||
}
|
||
lmc_rx_intr(sc);
|
||
if (sc->lmc_flags & LMC_RXIGNORE) {
|
||
/*
|
||
* Restart the receiver.
|
||
*/
|
||
sc->lmc_flags &= ~LMC_RXIGNORE;
|
||
LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
|
||
}
|
||
}
|
||
if (csr & TULIP_STS_ABNRMLINTR) {
|
||
u_int32_t tmp = csr & sc->lmc_intrmask
|
||
& ~(TULIP_STS_NORMALINTR|TULIP_STS_ABNRMLINTR);
|
||
if (csr & TULIP_STS_TXUNDERFLOW) {
|
||
if ((sc->lmc_cmdmode & TULIP_CMD_THRESHOLDCTL) != TULIP_CMD_THRSHLD160) {
|
||
sc->lmc_cmdmode += TULIP_CMD_THRSHLD96;
|
||
sc->lmc_flags |= LMC_NEWTXTHRESH;
|
||
} else if (sc->lmc_features & LMC_HAVE_STOREFWD) {
|
||
sc->lmc_cmdmode |= TULIP_CMD_STOREFWD;
|
||
sc->lmc_flags |= LMC_NEWTXTHRESH;
|
||
}
|
||
}
|
||
if (sc->lmc_flags & LMC_NOMESSAGES) {
|
||
sc->lmc_statusbits |= tmp;
|
||
} else {
|
||
lmc_print_abnormal_interrupt(sc, tmp);
|
||
sc->lmc_flags |= LMC_NOMESSAGES;
|
||
}
|
||
LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
|
||
}
|
||
|
||
if (csr & TULIP_STS_TXINTR)
|
||
lmc_tx_intr(sc);
|
||
|
||
if (sc->lmc_flags & LMC_WANTTXSTART)
|
||
lmc_ifstart(&sc->lmc_if);
|
||
}
|
||
}
|
||
|
||
lmc_intrfunc_t
|
||
lmc_intr_normal(void *arg)
|
||
{
|
||
lmc_softc_t * sc = (lmc_softc_t *) arg;
|
||
int progress = 0;
|
||
|
||
lmc_intr_handler(sc, &progress);
|
||
|
||
#if !defined(LMC_VOID_INTRFUNC)
|
||
return progress;
|
||
#endif
|
||
}
|
||
|
||
static struct mbuf *
|
||
lmc_mbuf_compress(struct mbuf *m)
|
||
{
|
||
struct mbuf *m0;
|
||
#if MCLBYTES >= LMC_MTU + PPP_HEADER_LEN && !defined(BIG_PACKET)
|
||
MGETHDR(m0, M_DONTWAIT, MT_DATA);
|
||
if (m0 != NULL) {
|
||
if (m->m_pkthdr.len > MHLEN) {
|
||
MCLGET(m0, M_DONTWAIT);
|
||
if ((m0->m_flags & M_EXT) == 0) {
|
||
m_freem(m);
|
||
m_freem(m0);
|
||
return NULL;
|
||
}
|
||
}
|
||
m_copydata(m, 0, m->m_pkthdr.len, mtod(m0, caddr_t));
|
||
m0->m_pkthdr.len = m0->m_len = m->m_pkthdr.len;
|
||
}
|
||
#else
|
||
int mlen = MHLEN;
|
||
int len = m->m_pkthdr.len;
|
||
struct mbuf **mp = &m0;
|
||
|
||
while (len > 0) {
|
||
if (mlen == MHLEN) {
|
||
MGETHDR(*mp, M_DONTWAIT, MT_DATA);
|
||
} else {
|
||
MGET(*mp, M_DONTWAIT, MT_DATA);
|
||
}
|
||
if (*mp == NULL) {
|
||
m_freem(m0);
|
||
m0 = NULL;
|
||
break;
|
||
}
|
||
if (len > MLEN) {
|
||
MCLGET(*mp, M_DONTWAIT);
|
||
if (((*mp)->m_flags & M_EXT) == 0) {
|
||
m_freem(m0);
|
||
m0 = NULL;
|
||
break;
|
||
}
|
||
(*mp)->m_len = (len <= MCLBYTES ? len : MCLBYTES);
|
||
} else {
|
||
(*mp)->m_len = (len <= mlen ? len : mlen);
|
||
}
|
||
m_copydata(m, m->m_pkthdr.len - len,
|
||
(*mp)->m_len, mtod((*mp), caddr_t));
|
||
len -= (*mp)->m_len;
|
||
mp = &(*mp)->m_next;
|
||
mlen = MLEN;
|
||
}
|
||
#endif
|
||
m_freem(m);
|
||
return m0;
|
||
}
|
||
|
||
/*
|
||
* queue the mbuf handed to us for the interface. If we cannot
|
||
* queue it, return the mbuf. Return NULL if the mbuf was queued.
|
||
*/
|
||
static struct mbuf *
|
||
lmc_txput(lmc_softc_t * const sc, struct mbuf *m)
|
||
{
|
||
lmc_ringinfo_t * const ri = &sc->lmc_txinfo;
|
||
lmc_desc_t *eop, *nextout;
|
||
int segcnt, free;
|
||
u_int32_t d_status, ctl;
|
||
#if defined(LMC_BUS_DMA) && !defined(LMC_BUS_DMA_NOTX)
|
||
bus_dmamap_t map;
|
||
int error;
|
||
#else
|
||
struct mbuf *m0;
|
||
#endif
|
||
|
||
#if defined(LMC_DEBUG)
|
||
if ((sc->lmc_cmdmode & TULIP_CMD_TXRUN) == 0) {
|
||
printf(LMC_PRINTF_FMT ": txput: tx not running\n",
|
||
LMC_PRINTF_ARGS);
|
||
sc->lmc_flags |= LMC_WANTTXSTART;
|
||
goto finish;
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
* Now we try to fill in our transmit descriptors. This is
|
||
* a bit reminiscent of going on the Ark two by two
|
||
* since each descriptor for the TULIP can describe
|
||
* two buffers. So we advance through packet filling
|
||
* each of the two entries at a time to fill each
|
||
* descriptor. Clear the first and last segment bits
|
||
* in each descriptor (actually just clear everything
|
||
* but the end-of-ring or chain bits) to make sure
|
||
* we don't get messed up by previously sent packets.
|
||
*
|
||
* We may fail to put the entire packet on the ring if
|
||
* there is either not enough ring entries free or if the
|
||
* packet has more than MAX_TXSEG segments. In the former
|
||
* case we will just wait for the ring to empty. In the
|
||
* latter case we have to recopy.
|
||
*/
|
||
#if !defined(LMC_BUS_DMA) || defined(LMC_BUS_DMA_NOTX)
|
||
again:
|
||
m0 = m;
|
||
#endif
|
||
d_status = 0;
|
||
eop = nextout = ri->ri_nextout;
|
||
segcnt = 0;
|
||
free = ri->ri_free;
|
||
#if defined(LMC_BUS_DMA) && !defined(LMC_BUS_DMA_NOTX)
|
||
/*
|
||
* Reclaim some DMA maps from if we are out.
|
||
*/
|
||
if (sc->lmc_txmaps_free == 0) {
|
||
#if defined(LMC_DEBUG)
|
||
sc->lmc_dbg.dbg_no_txmaps++;
|
||
#endif
|
||
free += lmc_tx_intr(sc);
|
||
}
|
||
if (sc->lmc_txmaps_free > 0) {
|
||
map = sc->lmc_txmaps[sc->lmc_txmaps_free-1];
|
||
} else {
|
||
sc->lmc_flags |= LMC_WANTTXSTART;
|
||
#if defined(LMC_DEBUG)
|
||
sc->lmc_dbg.dbg_txput_finishes[1]++;
|
||
#endif
|
||
goto finish;
|
||
}
|
||
error = bus_dmamap_load_mbuf(sc->lmc_dmatag, map, m, BUS_DMA_NOWAIT);
|
||
if (error != 0) {
|
||
if (error == EFBIG) {
|
||
/*
|
||
* The packet exceeds the number of transmit buffer
|
||
* entries that we can use for one packet, so we have
|
||
* to recopy it into one mbuf and then try again.
|
||
*/
|
||
m = lmc_mbuf_compress(m);
|
||
if (m == NULL) {
|
||
#if defined(LMC_DEBUG)
|
||
sc->lmc_dbg.dbg_txput_finishes[2]++;
|
||
#endif
|
||
goto finish;
|
||
}
|
||
error = bus_dmamap_load_mbuf(sc->lmc_dmatag, map, m,
|
||
BUS_DMA_NOWAIT);
|
||
}
|
||
if (error != 0) {
|
||
printf(LMC_PRINTF_FMT ": unable to load tx map, "
|
||
"error = %d\n", LMC_PRINTF_ARGS, error);
|
||
#if defined(LMC_DEBUG)
|
||
sc->lmc_dbg.dbg_txput_finishes[3]++;
|
||
#endif
|
||
goto finish;
|
||
}
|
||
}
|
||
if ((free -= (map->dm_nsegs + 1) / 2) <= 0
|
||
/*
|
||
* See if there's any unclaimed space in the transmit ring.
|
||
*/
|
||
&& (free += lmc_tx_intr(sc)) <= 0) {
|
||
/*
|
||
* There's no more room but since nothing
|
||
* has been committed at this point, just
|
||
* show output is active, put back the
|
||
* mbuf and return.
|
||
*/
|
||
sc->lmc_flags |= LMC_WANTTXSTART;
|
||
#if defined(LMC_DEBUG)
|
||
sc->lmc_dbg.dbg_txput_finishes[4]++;
|
||
#endif
|
||
bus_dmamap_unload(sc->lmc_dmatag, map);
|
||
goto finish;
|
||
}
|
||
for (; map->dm_nsegs - segcnt > 1; segcnt += 2) {
|
||
int flg;
|
||
|
||
eop = nextout;
|
||
flg = LMC_CTL_FLGS(le32toh(eop->d_ctl));
|
||
flg &= TULIP_DFLAG_ENDRING;
|
||
flg |= TULIP_DFLAG_TxNOPADDING;
|
||
if (sc->ictl.crc_length == 16)
|
||
flg |= TULIP_DFLAG_TxHASCRC;
|
||
eop->d_status = htole32(d_status);
|
||
eop->d_addr1 = htole32(map->dm_segs[segcnt].ds_addr);
|
||
eop->d_addr2 = htole32(map->dm_segs[segcnt+1].ds_addr);
|
||
eop->d_ctl = htole32(LMC_CTL(flg,
|
||
map->dm_segs[segcnt].ds_len,
|
||
map->dm_segs[segcnt+1].ds_len));
|
||
d_status = TULIP_DSTS_OWNER;
|
||
if (++nextout == ri->ri_last)
|
||
nextout = ri->ri_first;
|
||
}
|
||
if (segcnt < map->dm_nsegs) {
|
||
int flg;
|
||
|
||
eop = nextout;
|
||
flg = LMC_CTL_FLGS(le32toh(eop->d_ctl));
|
||
flg &= TULIP_DFLAG_ENDRING;
|
||
flg |= TULIP_DFLAG_TxNOPADDING;
|
||
if (sc->ictl.crc_length == 16)
|
||
flg |= TULIP_DFLAG_TxHASCRC;
|
||
eop->d_status = htole32(d_status);
|
||
eop->d_addr1 = htole32(map->dm_segs[segcnt].ds_addr);
|
||
eop->d_addr2 = 0;
|
||
eop->d_ctl = htole32(LMC_CTL(flg,
|
||
map->dm_segs[segcnt].ds_len, 0));
|
||
if (++nextout == ri->ri_last)
|
||
nextout = ri->ri_first;
|
||
}
|
||
LMC_TXMAP_PRESYNC(sc, map);
|
||
M_SETCTX(m, map);
|
||
map = NULL;
|
||
--sc->lmc_txmaps_free; /* commit to using the dmamap */
|
||
|
||
#else /* !LMC_BUS_DMA */
|
||
|
||
do {
|
||
int len = m0->m_len;
|
||
caddr_t addr = mtod(m0, caddr_t);
|
||
unsigned clsize = PAGE_SIZE - (((u_long) addr) & PAGE_MASK);
|
||
|
||
while (len > 0) {
|
||
unsigned slen = min(len, clsize);
|
||
#ifdef BIG_PACKET
|
||
int partial = 0;
|
||
if (slen >= 2048)
|
||
slen = 2040, partial = 1;
|
||
#endif
|
||
segcnt++;
|
||
if (segcnt > LMC_MAX_TXSEG) {
|
||
/*
|
||
* The packet exceeds the number of transmit
|
||
* buffer entries that we can use for one
|
||
* packet, so we have recopy it into one mbuf
|
||
* and then try again.
|
||
*/
|
||
m = lmc_mbuf_compress(m);
|
||
if (m == NULL)
|
||
goto finish;
|
||
goto again;
|
||
}
|
||
if (segcnt & 1) {
|
||
if (--free == 0) {
|
||
/*
|
||
* See if there's any unclaimed space
|
||
* in the transmit ring.
|
||
*/
|
||
if ((free += lmc_tx_intr(sc)) == 0) {
|
||
/*
|
||
* There's no more room but
|
||
* since nothing has been
|
||
* committed at this point,
|
||
* just show output is active,
|
||
* put back the mbuf and
|
||
* return.
|
||
*/
|
||
sc->lmc_flags |= LMC_WANTTXSTART;
|
||
goto finish;
|
||
}
|
||
}
|
||
eop = nextout;
|
||
if (++nextout == ri->ri_last)
|
||
nextout = ri->ri_first;
|
||
eop->d_flag &= TULIP_DFLAG_ENDRING;
|
||
eop->d_flag |= TULIP_DFLAG_TxNOPADDING;
|
||
if (sc->ictl.crc_length == 16)
|
||
eop->d_flag |= TULIP_DFLAG_TxHASCRC;
|
||
eop->d_status = d_status;
|
||
eop->d_addr1 = LMC_KVATOPHYS(sc, addr);
|
||
eop->d_length1 = slen;
|
||
} else {
|
||
/*
|
||
* Fill in second half of descriptor
|
||
*/
|
||
eop->d_addr2 = LMC_KVATOPHYS(sc, addr);
|
||
eop->d_length2 = slen;
|
||
}
|
||
d_status = TULIP_DSTS_OWNER;
|
||
len -= slen;
|
||
addr += slen;
|
||
#ifdef BIG_PACKET
|
||
if (partial)
|
||
continue;
|
||
#endif
|
||
clsize = PAGE_SIZE;
|
||
}
|
||
} while ((m0 = m0->m_next) != NULL);
|
||
#endif /* LMC_BUS_DMA */
|
||
|
||
|
||
/*
|
||
* The descriptors have been filled in. Now get ready
|
||
* to transmit.
|
||
*/
|
||
IF_ENQUEUE(&sc->lmc_txq, m);
|
||
m = NULL;
|
||
|
||
/*
|
||
* Make sure the next descriptor after this packet is owned
|
||
* by us since it may have been set up above if we ran out
|
||
* of room in the ring.
|
||
*/
|
||
nextout->d_status = 0;
|
||
LMC_TXDESC_PRESYNC(sc, nextout, sizeof(u_int32_t));
|
||
|
||
#if !defined(LMC_BUS_DMA) || defined(LMC_BUS_DMA_NOTX)
|
||
/*
|
||
* If we only used the first segment of the last descriptor,
|
||
* make sure the second segment will not be used.
|
||
*/
|
||
if (segcnt & 1) {
|
||
eop->d_addr2 = 0;
|
||
eop->d_length2 = 0;
|
||
}
|
||
#endif /* LMC_BUS_DMA */
|
||
|
||
/*
|
||
* Mark the last and first segments, indicate we want a transmit
|
||
* complete interrupt, and tell it to transmit!
|
||
*/
|
||
ctl = le32toh(eop->d_ctl);
|
||
eop->d_ctl = htole32(LMC_CTL(
|
||
LMC_CTL_FLGS(ctl)|TULIP_DFLAG_TxLASTSEG|TULIP_DFLAG_TxWANTINTR,
|
||
LMC_CTL_LEN1(ctl),
|
||
LMC_CTL_LEN2(ctl)));
|
||
|
||
/*
|
||
* Note that ri->ri_nextout is still the start of the packet
|
||
* and until we set the OWNER bit, we can still back out of
|
||
* everything we have done.
|
||
*/
|
||
ctl = le32toh(ri->ri_nextout->d_ctl);
|
||
ri->ri_nextout->d_ctl = htole32(LMC_CTL(
|
||
LMC_CTL_FLGS(ctl)|TULIP_DFLAG_TxFIRSTSEG,
|
||
LMC_CTL_LEN1(ctl),
|
||
LMC_CTL_LEN2(ctl)));
|
||
#if defined(LMC_BUS_MAP) && !defined(LMC_BUS_DMA_NOTX)
|
||
if (eop < ri->ri_nextout) {
|
||
LMC_TXDESC_PRESYNC(sc, ri->ri_nextout,
|
||
(caddr_t) ri->ri_last - (caddr_t) ri->ri_nextout);
|
||
LMC_TXDESC_PRESYNC(sc, ri->ri_first,
|
||
(caddr_t) (eop + 1) - (caddr_t) ri->ri_first);
|
||
} else {
|
||
LMC_TXDESC_PRESYNC(sc, ri->ri_nextout,
|
||
(caddr_t) (eop + 1) - (caddr_t) ri->ri_nextout);
|
||
}
|
||
#endif
|
||
ri->ri_nextout->d_status = htole32(TULIP_DSTS_OWNER);
|
||
LMC_TXDESC_PRESYNC(sc, ri->ri_nextout, sizeof(u_int32_t));
|
||
|
||
LMC_CSR_WRITE(sc, csr_txpoll, 1);
|
||
|
||
/*
|
||
* This advances the ring for us.
|
||
*/
|
||
ri->ri_nextout = nextout;
|
||
ri->ri_free = free;
|
||
|
||
/*
|
||
* switch back to the single queueing ifstart.
|
||
*/
|
||
sc->lmc_flags &= ~LMC_WANTTXSTART;
|
||
sc->lmc_if.if_start = lmc_ifstart_one;
|
||
|
||
/*
|
||
* If we want a txstart, there must be not enough space in the
|
||
* transmit ring. So we want to enable transmit done interrupts
|
||
* so we can immediately reclaim some space. When the transmit
|
||
* interrupt is posted, the interrupt handler will call tx_intr
|
||
* to reclaim space and then txstart (since WANTTXSTART is set).
|
||
* txstart will move the packet into the transmit ring and clear
|
||
* WANTTXSTART thereby causing TXINTR to be cleared.
|
||
*/
|
||
finish:
|
||
if (sc->lmc_flags & LMC_WANTTXSTART) {
|
||
sc->lmc_if.if_flags |= IFF_OACTIVE;
|
||
sc->lmc_if.if_start = lmc_ifstart;
|
||
}
|
||
|
||
return m;
|
||
}
|
||
|
||
|
||
/*
|
||
* This routine is entered at splnet() (splsoftnet() on NetBSD)
|
||
*/
|
||
static int
|
||
lmc_ifioctl(struct ifnet * ifp, ioctl_cmd_t cmd, caddr_t data)
|
||
{
|
||
lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
lmc_spl_t s;
|
||
#endif
|
||
int error = 0;
|
||
struct ifreq *ifr = (struct ifreq *)data;
|
||
u_int32_t new_state;
|
||
u_int32_t old_state;
|
||
lmc_ctl_t ctl;
|
||
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
s = LMC_RAISESPL();
|
||
#endif
|
||
|
||
switch (cmd) {
|
||
case LMCIOCGINFO:
|
||
error = copyout(&sc->ictl, ifr->ifr_data, sizeof(lmc_ctl_t));
|
||
|
||
goto out;
|
||
break;
|
||
|
||
case LMCIOCSINFO:
|
||
#if 0 /* XXX */
|
||
error = suser(p->p_ucred, &p->p_acflag);
|
||
if (error)
|
||
goto out;
|
||
#endif
|
||
|
||
error = copyin(ifr->ifr_data, &ctl, sizeof(lmc_ctl_t));
|
||
if (error != 0)
|
||
goto out;
|
||
|
||
sc->lmc_media->set_status(sc, &ctl);
|
||
|
||
goto out;
|
||
break;
|
||
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
case SIOCSIFMTU:
|
||
/*
|
||
* Don't allow the MTU to get larger than we can handle
|
||
*/
|
||
if (ifr->ifr_mtu > LMC_MTU) {
|
||
error = EINVAL;
|
||
goto out;
|
||
} else {
|
||
ifp->if_mtu = ifr->ifr_mtu;
|
||
}
|
||
break;
|
||
#endif
|
||
}
|
||
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
/*
|
||
* call the sppp ioctl layer
|
||
*/
|
||
error = sppp_ioctl(ifp, cmd, data);
|
||
if (error != 0)
|
||
goto out;
|
||
#endif
|
||
|
||
#if defined(__bsdi__)
|
||
error = p2p_ioctl(ifp, cmd, data);
|
||
#endif
|
||
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
/*
|
||
* If we are transitioning from up to down or down to up, call
|
||
* our init routine.
|
||
*/
|
||
new_state = ifp->if_flags & IFF_UP;
|
||
old_state = sc->lmc_flags & LMC_IFUP;
|
||
|
||
if (new_state && !old_state)
|
||
lmc_ifup(sc);
|
||
else if (!new_state && old_state)
|
||
lmc_ifdown(sc);
|
||
#endif
|
||
|
||
out:
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
LMC_RESTORESPL(s);
|
||
#endif
|
||
|
||
return error;
|
||
}
|
||
|
||
/*
|
||
* These routines gets called at device spl (from sppp_output).
|
||
*/
|
||
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
static ifnet_ret_t
|
||
lmc_ifstart(struct ifnet * const ifp)
|
||
{
|
||
lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
|
||
struct mbuf *m;
|
||
|
||
if (sc->lmc_flags & LMC_IFUP) {
|
||
while (sppp_isempty(ifp) == 0) {
|
||
m = sppp_dequeue(ifp);
|
||
if (!m)
|
||
break;
|
||
if ((m = lmc_txput(sc, m)) != NULL) {
|
||
IF_PREPEND(&((struct sppp *)ifp)->pp_fastq, m);
|
||
break;
|
||
}
|
||
}
|
||
LMC_CSR_WRITE(sc, csr_txpoll, 1);
|
||
}
|
||
}
|
||
|
||
static ifnet_ret_t
|
||
lmc_ifstart_one(struct ifnet * const ifp)
|
||
{
|
||
lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
|
||
struct mbuf *m;
|
||
|
||
if ((sc->lmc_flags & LMC_IFUP) && (sppp_isempty(ifp) == 0)) {
|
||
m = sppp_dequeue(ifp);
|
||
if (m) {
|
||
if ((m = lmc_txput(sc, m)) != NULL)
|
||
IF_PREPEND(&((struct sppp *)ifp)->pp_fastq, m);
|
||
}
|
||
LMC_CSR_WRITE(sc, csr_txpoll, 1);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
#if defined(__bsdi__)
|
||
static ifnet_ret_t
|
||
lmc_ifstart(struct ifnet * const ifp)
|
||
{
|
||
lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
|
||
struct mbuf *m;
|
||
struct ifqueue *ifq;
|
||
|
||
if ((sc->lmc_flags & LMC_IFUP) == 0)
|
||
return;
|
||
|
||
for (;;) {
|
||
ifq = &sc->lmc_p2pcom.p2p_isnd;
|
||
|
||
m = ifq->ifq_head;
|
||
if (m == NULL) {
|
||
ifq = &sc->lmc_if.if_snd;
|
||
m = ifq->ifq_head;
|
||
}
|
||
if (m == NULL)
|
||
break;
|
||
IF_DEQUEUE(ifq, m);
|
||
|
||
m = lmc_txput(sc, m);
|
||
if (m != NULL) {
|
||
IF_PREPEND(ifq, m);
|
||
break;
|
||
}
|
||
}
|
||
|
||
LMC_CSR_WRITE(sc, csr_txpoll, 1);
|
||
}
|
||
|
||
static ifnet_ret_t
|
||
lmc_ifstart_one(struct ifnet * const ifp)
|
||
{
|
||
lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
|
||
struct mbuf *m;
|
||
struct ifqueue *ifq;
|
||
|
||
if ((sc->lmc_flags & LMC_IFUP) == 0)
|
||
return;
|
||
|
||
ifq = &sc->lmc_p2pcom.p2p_isnd;
|
||
|
||
m = ifq->ifq_head;
|
||
if (m == NULL) {
|
||
ifq = &sc->lmc_if.if_snd;
|
||
m = ifq->ifq_head;
|
||
}
|
||
if (m == NULL)
|
||
return 0;
|
||
IF_DEQUEUE(ifq, m);
|
||
|
||
m = lmc_txput(sc, m);
|
||
if (m != NULL)
|
||
IF_PREPEND(ifq, m);
|
||
|
||
LMC_CSR_WRITE(sc, csr_txpoll, 1);
|
||
}
|
||
#endif
|
||
|
||
#if defined(__bsdi__)
|
||
int
|
||
lmc_getmdm(struct p2pcom *pp, caddr_t b)
|
||
{
|
||
lmc_softc_t *sc = LMC_UNIT_TO_SOFTC(pp->p2p_if.if_unit);
|
||
|
||
if (sc->lmc_media->get_link_status(sc)) {
|
||
*(int *)b = TIOCM_CAR;
|
||
} else {
|
||
*(int *)b = 0;
|
||
}
|
||
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
lmc_mdmctl(struct p2pcom *pp, int flag)
|
||
{
|
||
lmc_softc_t *sc = LMC_UNIT_TO_SOFTC(pp->p2p_if.if_unit);
|
||
|
||
sc->lmc_media->set_link_status(sc, flag);
|
||
|
||
if (flag)
|
||
if ((sc->lmc_flags & LMC_IFUP) == 0)
|
||
lmc_ifup(sc);
|
||
else
|
||
if ((sc->lmc_flags & LMC_IFUP) == LMC_IFUP)
|
||
lmc_ifdown(sc);
|
||
|
||
return (0);
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
* Set up the OS interface magic and attach to the operating system
|
||
* network services.
|
||
*/
|
||
void
|
||
lmc_attach(lmc_softc_t * const sc)
|
||
{
|
||
struct ifnet * const ifp = &sc->lmc_if;
|
||
|
||
ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
|
||
ifp->if_ioctl = lmc_ifioctl;
|
||
ifp->if_start = lmc_ifstart;
|
||
ifp->if_watchdog = lmc_watchdog;
|
||
ifp->if_timer = 1;
|
||
ifp->if_mtu = LMC_MTU;
|
||
|
||
#if defined(__bsdi__)
|
||
ifp->if_type = IFT_NONE;
|
||
ifp->if_unit = (sc->lmc_dev.dv_unit);
|
||
#endif
|
||
|
||
if_attach(ifp);
|
||
|
||
#if defined(__NetBSD__) || defined(__FreeBSD__)
|
||
sc->lmc_sppp.pp_framebytes = 3; /* 1 flag byte, 2 byte FCS */
|
||
sppp_attach((struct ifnet *)&sc->lmc_sppp);
|
||
sc->lmc_sppp.pp_flags = PP_CISCO | PP_KEEPALIVE;
|
||
#endif
|
||
#if defined(__bsdi__)
|
||
sc->lmc_p2pcom.p2p_mdmctl = lmc_mdmctl;
|
||
sc->lmc_p2pcom.p2p_getmdm = lmc_getmdm;
|
||
p2p_attach(&sc->lmc_p2pcom);
|
||
#endif
|
||
|
||
#if NBPFILTER > 0
|
||
LMC_BPF_ATTACH(sc);
|
||
#endif
|
||
|
||
#if defined(__NetBSD__) && NRND > 0
|
||
rnd_attach_source(&sc->lmc_rndsource, sc->lmc_dev.dv_xname,
|
||
RND_TYPE_NET, 0);
|
||
#endif
|
||
|
||
/*
|
||
* turn off those LEDs...
|
||
*/
|
||
sc->lmc_miireg16 |= LMC_MII16_LED_ALL;
|
||
lmc_led_on(sc, LMC_MII16_LED0);
|
||
}
|
||
|
||
void
|
||
lmc_initring(lmc_softc_t * const sc, lmc_ringinfo_t * const ri,
|
||
lmc_desc_t *descs, int ndescs)
|
||
{
|
||
ri->ri_max = ndescs;
|
||
ri->ri_first = descs;
|
||
ri->ri_last = ri->ri_first + ri->ri_max;
|
||
memset((caddr_t) ri->ri_first, 0, sizeof(ri->ri_first[0]) * ri->ri_max);
|
||
ri->ri_last[-1].d_ctl = htole32(LMC_CTL(TULIP_DFLAG_ENDRING, 0, 0));
|
||
}
|