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78dda2ae0c
driver seems relatively functional, but could use some souping up, particularly in the performance area. This has both NetBSD and FreeBSD attachment code and a fair amount of effort has been put into making it easy to port to different *BSD platforms. The basic design is a one tfd per mbuf transmit (with no transmit related interrupts- tfds are gc'd as needed). The receive ring uses a 2K buffer per rfd with a +2 byte adjust for the ethernet header (so the payload is aligned). There's support that *almost* works for doing large packets- the rfd chaining code works, but there's some problem with getting good checksums at the IP reassembly level (ditto for doing short tfd's too). The chip has support for TCP checksums insertion for transmit and TCP checksum calculation on receive (for both you have to do some appropriate backoff && twiddling), but this isn't in place. This is nearly entirely reverse engineered from the released Intel driver, so there's a lot of "We have to do this but do not know why" stuff. There is somebody who has the chip specs who works in FreeBSD but they're being a bit standoffish about even sharing hints which is somewhat annoying. It's also apparent that all I had to work with were the first rev boards. This driver has been lightly tested on intel && alpha, but only point-to-point. There may be some issues with switches- use of boot time environment variables that override EEPROM settings (e.g., 'set wx_ilos=1' which inverts the sense of optical signal loss) may help with this. I had this out for review for three weeks, and nobody said anything negative or positive, ergo, this checkin has no 'reviewed by' field which I would have preferred.
317 lines
8.8 KiB
C
317 lines
8.8 KiB
C
/*
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* Copyright (c) 1999, Traakan Software
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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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* $FreeBSD$
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*/
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/*
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* Softc definitions for the Intel Gigabit Ethernet driver.
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*
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* Guidance and inspiration from David Greenman's
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* if_fxp driver gratefully acknowledged here.
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*/
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/*
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* Platform specific defines and inline functions go here.
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* Look further below for more generic structures.
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*/
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#if defined(__NetBSD__)
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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/protosw.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>
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#include <sys/device.h>
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#include <net/if.h>
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#if defined(SIOCSIFMEDIA)
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#include <net/if_media.h>
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#endif
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#include <net/if_types.h>
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#include <net/if_dl.h>
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#include <net/route.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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#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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#endif
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#ifdef NS
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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#endif
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/vm_kern.h>
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#include <net/if_ether.h>
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#if defined(INET)
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#include <netinet/if_inarp.h>
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#endif
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcidevs.h>
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#include <dev/pci/if_wxreg.h>
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struct wxmdvar {
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struct device dev; /* generic device structures */
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void * ih; /* interrupt handler cookie */
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struct ethercom ethercom; /* ethernet common part */
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pci_chipset_tag_t pci_pc;
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pcitag_t pci_tag;
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u_int8_t enaddr[6]; /* our mac address */
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u_int32_t cmdw;
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bus_space_tag_t st; /* bus space tag */
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bus_space_handle_t sh; /* bus space handle */
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struct ifmedia ifm;
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struct wx_softc * next;
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};
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#define wx_dev w.dev
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#define wx_enaddr w.enaddr
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#define wx_cmdw w.cmdw
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#define wx_media w.ifm
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#define wx_next w.next
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#define wx_if w.ethercom.ec_if
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#define wx_name w.dev.dv_xname
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#define IOCTL_CMD_TYPE u_long
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#define WXMALLOC(len) malloc(len, M_DEVBUF, M_NOWAIT)
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#define WXFREE(ptr) free(ptr, M_DEVBUF)
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#define SOFTC_IFP(ifp) ifp->if_softc
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#define WX_BPFTAP_ARG(ifp) (ifp)->if_bpf
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#define TIMEOUT(sc, func, arg, time) timeout(func, arg, time)
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#define VTIMEOUT(sc, func, arg, time) timeout(func, arg, time)
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#define UNTIMEOUT(f, arg, sc) untimeout(f, arg)
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#define INLINE inline
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#define vm_offset_t vaddr_t
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#ifndef IFM_1000_SX
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#define IFM_1000_SX IFM_1000_FX
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#endif
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#define READ_CSR _read_csr
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#define WRITE_CSR _write_csr
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#elif defined(__FreeBSD__)
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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/protosw.h>
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#include <sys/socket.h>
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#include <sys/malloc.h>
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#include <sys/kernel.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_media.h>
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#ifdef NS
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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#endif
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#include <net/bpf.h>
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#include <sys/sockio.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <net/ethernet.h>
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#include <net/if_arp.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/clock.h>
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#include <pci/pcivar.h>
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#include <pci/pcireg.h>
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#include <pci/if_wxreg.h>
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#include "opt_bdg.h"
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#ifdef BRIDGE
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#include <net/if_types.h>
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#include <net/bridge.h>
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#endif
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struct wxmdvar {
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struct device * dev; /* backpointer to device */
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struct arpcom arpcom; /* per-interface network data */
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struct resource * mem; /* resource descriptor for registers */
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struct resource * irq; /* resource descriptor for interrupt */
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void * ih; /* interrupt handler cookie */
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u_int16_t cmdw;
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struct callout_handle sch; /* handle for timeouts */
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char name[8];
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bus_space_tag_t st; /* bus space tag */
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bus_space_handle_t sh; /* bus space handle */
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struct ifmedia ifm;
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struct wx_softc * next;
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};
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#define wx_dev w.dev
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#define wx_enaddr w.arpcom.ac_enaddr
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#define wx_cmdw w.cmdw
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#define wx_media w.ifm
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#define wx_next w.next
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#define wx_if w.arpcom.ac_if
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#define wx_name w.name
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#define IOCTL_CMD_TYPE u_long
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#define WXMALLOC(len) malloc(len, M_DEVBUF, M_NOWAIT)
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#define WXFREE(ptr) free(ptr, M_DEVBUF)
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#define SOFTC_IFP(ifp) ifp->if_softc
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#define WX_BPFTAP_ARG(ifp) ifp
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#define VTIMEOUT(sc, func, arg, time) (void) timeout(func, arg, time)
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#define TIMEOUT(sc, func, arg, time) (sc)->w.sch = timeout(func, arg, time)
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#define UNTIMEOUT(f, arg, sc) untimeout(f, arg, (sc)->w.sch)
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#define INLINE __inline
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#define READ_CSR(sc, reg) \
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bus_space_read_4((sc)->w.st, (sc)->w.sh, (reg))
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#define WRITE_CSR(sc, reg, val) \
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bus_space_write_4((sc)->w.st, (sc)->w.sh, (reg), (val))
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#endif
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/*
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* Transmit soft descriptor, used to manage packets as they come in.
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*/
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typedef struct rxpkt {
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struct mbuf *dptr; /* pointer to receive frame */
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u_int32_t dma_addr; /* dma address */
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} rxpkt_t;
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/*
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* Transmit soft descriptor, used to manage packets as they are transmitted.
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*/
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typedef struct txpkt {
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struct txpkt *next; /* next in a chain */
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struct mbuf *dptr; /* pointer to mbuf being sent */
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u_int32_t sidx; /* start index */
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u_int32_t eidx; /* end index */
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} txpkt_t;
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typedef struct wx_softc {
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/*
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* OS dependent storage... must be first...
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*/
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struct wxmdvar w;
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/*
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* misc goodies
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*/
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u_int32_t : 18,
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wx_no_flow : 1,
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wx_ilos : 1,
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wx_no_ilos : 1,
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wx_debug : 1,
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linkup : 1,
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all_mcasts : 1,
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revision : 8; /* chip revision */
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u_int16_t wx_cfg1;
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u_int16_t wx_txint_delay;
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u_int32_t wx_ienable; /* current ienable to use */
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u_int32_t wx_dcr; /* dcr used */
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u_int32_t wx_icr; /* last icr */
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/*
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* Statistics, soft && hard
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*/
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u_int32_t wx_intr;
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u_int32_t wx_linkintr;
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u_int32_t wx_rxintr;
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u_int32_t wx_xmitgc;
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u_int32_t wx_xmitpullup;
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u_int32_t wx_xmitcluster;
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u_int32_t wx_xmitputback;
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u_int32_t wx_xmitwanted;
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u_int32_t wx_xmitblocked;
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u_int32_t wx_xmitblocked1;
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u_int32_t wx_xmitrunt;
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u_int32_t wx_rxnobuf;
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/*
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* Soft copies of multicast addresses. We're only
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* using (right now) the rest of the receive address
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* registers- not the hashed multicast table.
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*/
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u_int8_t wx_mcaddr[WX_RAL_TAB_SIZE-1][6];
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u_int8_t wx_nmca; /* # active multicast addrs */
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/*
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* Receive Management
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* We have software and shared memory rings in a buddy store format.
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*/
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wxrd_t *rdescriptors; /* receive descriptor ring */
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rxpkt_t *rbase; /* base of soft rdesc list */
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u_int16_t rnxt; /* next descriptor to check */
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u_int16_t _pad;
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/*
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* Transmit Management
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* We have software and shared memory rings in a buddy store format.
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*/
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txpkt_t *tbase; /* base of soft soft management */
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txpkt_t *tbsyf, *tbsyl; /* linked busy list */
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wxtd_t *tdescriptors; /* transmit descriptor ring */
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u_int16_t tnxtfree; /* next free index (circular) */
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u_int16_t tactive; /* # active */
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} wx_softc_t;
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/*
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* We offset the the receive frame header by two bytes so that the actual
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* payload is 32 bit aligned. On platforms that require strict structure
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* alignment, this means that the ethernet frame header may have to be shifted
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* to align it at interrupt time, but because it's such a small amount
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* (fourteen bytes) and processors have gotten pretty fast, that's okay.
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* It may even turn out on some platforms that this doesn't have to happen.
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*/
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#define WX_RX_OFFSET_VALUE 2
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/*
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* Tunable Parameters.
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*
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* Descriptor lengths must be in multiples of 8.
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*/
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#define WX_MAX_TDESC 256 /* number of transmit descriptors */
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#define T_NXT_IDX(x) ((x + 1) & (WX_MAX_TDESC - 1))
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#define WX_MAX_RDESC 64 /* number of receive descriptors */
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#define R_NXT_IDX(x) ((x + 1) & (WX_MAX_RDESC - 1))
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