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[unix-history] / sys / i386 / isa / if_we.c
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Tim L. Tucker.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)if_we.c 7.3 (Berkeley) 5/21/91
*
* PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
* -------------------- ----- ----------------------
* CURRENT PATCH LEVEL: 2 00112
* -------------------- ----- ----------------------
*
* 09 Sep 92 Mike Durkin Fix Danpex EW-2016 & other 8013 clones
* enable with "options WECOMPAT"
* 19 Sep 92 Michael Galassi Fixed multiboard routing
* 20 Sep 92 Barry Lustig WD8013 16 bit mode -- enable
* with "options WD8013".
* 14 Mar 93 Marc Frajola BPF packet filter support
* 14 Mar 93 David Greenman Input and other routines re-written
* 14 Mar 93 Rodney W. Grimes Added link level address to we_attach
*/
/*
* Modification history
*
* 8/28/89 - Initial version(if_wd.c), Tim L Tucker
*
* 92.09.19 - Changes to allow multiple we interfaces in one box.
* Allowed interupt handler to look at unit other than 0
* Bdry was static, made it into an array w/ one entry per
* interface. nerd@percival.rain.com (Michael Galassi)
*
* BPF Packet Filter Support added by Marc Frajola, 12/30/92
* Input & other routines re-written by David Greenman, 1/2/93
* BPF trailer support added by David Greenman, 1/7/93
* we_attach enhanced with link level address by Rodney W. Grimes, 1/30/93
*
* $Log: if_we.c,v $
* Revision 1.4 1993/08/24 00:15:31 rgrimes
* Fixed the printf's for ethernet address so that ALL ethernet drivers are
* consistent in the format of this.
*
* Revision 1.3 1993/08/22 22:54:56 ats
* Added a new-line in the output of the ethernet-address that it gets
* on it's line alone ( not mangled with the FPU detection ).
* Commented out a debug printf in if_ec.c ( printf("ecinit") ).
*
* Revision 1.2 1993/07/29 12:07:10 davidg
* Added include of systm.h to get min/max/bcmp etc...
*
* Revision 1.1.1.1 1993/06/12 14:58:01 rgrimes
* Initial import, 0.1 + pk 0.2.4-B1
*
* Revision 1.2 93/02/18 17:21:57 davidg
* Bugs in mbuf cluster allocation fixed
* Problem with nfs wanting mbufs aligned on longword boundries fixed
*
*/
#include "we.h"
#if NWE > 0
/*
* Western Digital 8003 ethernet/starlan adapter
*
* Supports the following interface cards:
* WD8003E, WD8003EBT, WD8003S, WD8003SBT, WD8013EBT
*
* The Western Digital card is one of many AT/MCA ethernet interfaces
* based on the National DS8390 Network Interface chip set.
*/
#include "param.h"
#include "systm.h"
#include "mbuf.h"
#include "socket.h"
#include "ioctl.h"
#include "errno.h"
#include "syslog.h"
#include "net/if.h"
#include "net/if_types.h"
#include "net/if_dl.h"
#include "net/netisr.h"
#ifdef INET
#include "netinet/in.h"
#include "netinet/in_systm.h"
#include "netinet/in_var.h"
#include "netinet/ip.h"
#include "netinet/if_ether.h"
#endif
#ifdef NS
#include "netns/ns.h"
#include "netns/ns_if.h"
#endif
#include "bpfilter.h"
#if NBPFILTER > 0
#include "net/bpf.h"
#include "net/bpfdesc.h"
#endif
#include "i386/isa/isa.h"
#include "i386/isa/if_wereg.h"
#include "i386/isa/isa_device.h"
#include "i386/isa/icu.h"
#include "i386/include/pio.h"
static inline char *we_ring_copy();
/*
* This constant should really be 60 because the we adds 4 bytes of crc.
* However when set to 60 our packets are ignored by deunas , 3coms are
* okay ??????????????????????????????????????????
*/
#define ETHER_MIN_LEN 64
#define ETHER_ADDR_LEN 6
#define ETHER_HDR_SIZE 14
/*
* Ethernet software status per interface.
*
* Each interface is referenced by a network interface structure,
* qe_if, which the routing code uses to locate the interface.
* This structure contains the output queue for the interface, its address, ...
*/
struct we_softc {
struct arpcom arpcom; /* Ethernet common part */
u_char we_flags; /* software state */
#define WDF_RUNNING 0x01
#define WDF_TXBUSY 0x02
#if NBPFILTER > 0
#define WDF_ATTACHED 0x80
#endif
u_char we_type; /* interface type code */
u_short we_vector; /* interrupt vector */
short we_io_ctl_addr; /* i/o bus address, control */
short we_io_nic_addr; /* i/o bus address, DS8390 */
caddr_t we_vmem_addr; /* card RAM virtual memory base */
u_long we_vmem_size; /* card RAM bytes */
caddr_t we_vmem_ring; /* receive ring RAM vaddress */
caddr_t we_vmem_end; /* receive ring RAM end */
caddr_t we_bpf; /* Magic Cookie for BPF */
} we_softc[NWE];
int weprobe(), weattach(), weintr(), westart();
int weinit(), ether_output(), weioctl(), wereset(), wewatchdog();
struct isa_driver wedriver = {
weprobe, weattach, "we",
};
static unsigned short wemask[] =
{ IRQ9, IRQ3, IRQ5, IRQ7, IRQ10, IRQ11, IRQ15, IRQ4 };
/*
* Probe the WD8003 to see if its there
*/
weprobe(is)
struct isa_device *is;
{
register int i;
register struct we_softc *sc = &we_softc[is->id_unit];
union we_mem_sel wem;
u_char sum;
#ifdef WD8013 /* 20 Sep 92*/
union we_laar laar;
laar.laar_byte = 0;
#endif /* WD8013*/
wem.ms_byte = 0; /* 20 Sep 92*/
/* reset card to force it into a known state. */
outb(is->id_iobase, 0x80);
DELAY(100);
outb(is->id_iobase, 0x00);
/* wait in the case this card is reading it's EEROM */
DELAY(5000);
#ifdef WD8013 /* 20 Sep 92*/
/* allow the NIC to access the shared RAM 16 bits at a time */
laar.addr_l19 = 1;
laar.lan_16_en = 1;
laar.mem_16_en = 1;
outb(is->id_iobase+5, laar.laar_byte); /* Write a 0xc1 */
#endif /* WD8013*/
/*
* Here we check the card ROM, if the checksum passes, and the
* type code and ethernet address check out, then we know we have
* a wd8003 card.
*
* Autoconfiguration: No warning message is printed on error.
*/
for (sum = 0, i = 0; i < 8; ++i)
sum += inb(is->id_iobase + WD_ROM_OFFSET + i);
if (sum != WD_CHECKSUM) { /* 09 Sep 92*/
#ifdef WECOMPAT
printf( "we%d: probe: checksum failed... installing anyway\n",
is->id_unit);
printf( "we%d: Danpex EW-2016 or other 8013 clone card?\n",
is->id_unit);
#else /* !WECOMPAT*/
return (0);
#endif /* !WECOMPAT*/
}
sc->we_type = inb(is->id_iobase + WD_ROM_OFFSET + 6);
#ifdef nope
if ((sc->we_type & WD_REVMASK) != 2 /* WD8003E or WD8003S */
&& (sc->we_type & WD_REVMASK) != 4 /* WD8003EBT */
&& (sc->we_type & WD_REVMASK) != 6) /* WD8003ELB? */
return (0);
#endif
/*printf("type %x ", sc->we_type);*/
if (sc->we_type & WD_SOFTCONFIG) {
int iv = inb(is->id_iobase + 1) & 4 |
((inb(is->id_iobase+4) & 0x60) >> 5);
/*printf("iv %d ", iv);*/
if (wemask[iv] != is->id_irq)
return(0);
outb(is->id_iobase+4, inb(is->id_iobase+4) | 0x80);
}
/*
* Setup card RAM area and i/o addresses
* Kernel Virtual to segment C0000-DFFFF?????
*/
sc->we_io_ctl_addr = is->id_iobase;
sc->we_io_nic_addr = sc->we_io_ctl_addr + WD_NIC_OFFSET;
sc->we_vector = is->id_irq;
sc->we_vmem_addr = (caddr_t)is->id_maddr;
sc->we_vmem_size = is->id_msize;
sc->we_vmem_ring = sc->we_vmem_addr + (WD_PAGE_SIZE * WD_TXBUF_SIZE);
sc->we_vmem_end = sc->we_vmem_addr + is->id_msize;
/*
* Save board ROM station address
*/
for (i = 0; i < ETHER_ADDR_LEN; ++i)
sc->arpcom.ac_enaddr[i] = inb(sc->we_io_ctl_addr + WD_ROM_OFFSET + i);
/*
* Mapin interface memory, setup memory select register
*/
wem.ms_addr = kvtop(sc->we_vmem_addr) >> 13;
wem.ms_enable = 1;
wem.ms_reset = 0;
outb(sc->we_io_ctl_addr, wem.ms_byte);
/*
* clear interface memory, then sum to make sure its valid
*/
for (i = 0; i < sc->we_vmem_size; ++i)
sc->we_vmem_addr[i] = 0x0;
for (sum = 0, i = 0; i < sc->we_vmem_size; ++i)
sum += sc->we_vmem_addr[i];
if (sum != 0x0) {
printf("we%d: wd8003 dual port RAM address error\n", is->id_unit);
return (0);
}
return (WD_IO_PORTS);
}
/*
* Interface exists: make available by filling in network interface
* record. System will initialize the interface when it is ready
* to accept packets.
*/
weattach(is)
struct isa_device *is;
{
register struct we_softc *sc = &we_softc[is->id_unit];
register struct ifnet *ifp = &sc->arpcom.ac_if;
union we_command wecmd;
struct ifaddr *ifa;
struct sockaddr_dl *sdl;
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
wecmd.cs_stp = 1;
wecmd.cs_sta = 0;
wecmd.cs_ps = 0;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
/*
* Initialize ifnet structure
*/
ifp->if_unit = is->id_unit;
ifp->if_name = "we" ;
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS ;
ifp->if_init = weinit;
ifp->if_output = ether_output;
ifp->if_start = westart;
ifp->if_ioctl = weioctl;
ifp->if_reset = wereset;
ifp->if_watchdog = wewatchdog;
if_attach(ifp);
/* Search down the ifa address list looking for the AF_LINK type entry */
ifa = ifp->if_addrlist;
while ((ifa != 0) &&
(ifa->ifa_addr != 0) &&
(ifa->ifa_addr->sa_family != AF_LINK))
{
ifa = ifa->ifa_next;
}
/* If we find an AF_LINK type entry, we well fill in the hardware addr */
if ((ifa != 0) &&
(ifa->ifa_addr != 0))
{
/* Fill in the link level address for this interface */
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
sdl->sdl_type = IFT_ETHER;
sdl->sdl_alen = ETHER_ADDR_LEN;
sdl->sdl_slen = 0;
bcopy(sc->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN);
}
#if NBPFILTER > 0
sc->we_flags &= ~WDF_ATTACHED; /* Make sure BPF attach flag clear */
#endif
/*
* Banner...
*/
printf("we%d: %s address %s\n",
is->id_unit,
(sc->we_type & WD_ETHERNET) ? "ethernet" : "starlan",
ether_sprintf(sc->arpcom.ac_enaddr));
}
/*
* Reset of interface.
*/
wereset(unit, uban)
int unit, uban;
{
if (unit >= NWE)
return;
printf("we%d: reset\n", unit);
/* we_softc[unit].we_flags &= ~WDF_RUNNING; */
weinit(unit);
}
/*
* Take interface offline.
*/
westop(unit)
int unit;
{
register struct we_softc *sc = &we_softc[unit];
union we_command wecmd;
int s;
/*
* Shutdown DS8390
*/
s = splimp();
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
wecmd.cs_stp = 1;
wecmd.cs_sta = 0;
wecmd.cs_ps = 0;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
(void) splx(s);
}
wewatchdog(unit) {
weintr(unit);
/*log(LOG_WARNING,"we%d: soft reset\n", unit);
westop(unit);
weinit(unit);*/
}
static Bdry[NWE]; /* 19 Sep 92*/
/*
* Initialization of interface (really just DS8390).
*/
weinit(unit)
int unit;
{
register struct we_softc *sc = &we_softc[unit];
register struct ifnet *ifp = &sc->arpcom.ac_if;
union we_command wecmd;
int i, s;
#if NBPFILTER > 0
if ((sc->we_flags & WDF_ATTACHED) == 0) {
bpfattach(&sc->we_bpf, ifp, DLT_EN10MB,
sizeof(struct ether_header));
sc->we_flags |= WDF_ATTACHED;
}
#endif
/* address not known */
if (ifp->if_addrlist == (struct ifaddr *)0)
return;
/* already running */
/*if (ifp->if_flags & IFF_RUNNING) return; */
/*
* Initialize DS8390 in order given in NSC NIC manual.
* this is stock code...please see the National manual for details.
*/
s = splhigh();
Bdry[unit] = 0; /* 19 Sep 92*/
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
wecmd.cs_stp = 1;
wecmd.cs_sta = 0;
wecmd.cs_ps = 0;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
#ifdef WD8013 /* 20 Sep 92*/
/* enable 16 bit access if 8013 card */
outb(sc->we_io_nic_addr + WD_P0_DCR, WD_D_CONFIG16);
#else /* !WD8013*/
outb(sc->we_io_nic_addr + WD_P0_DCR, WD_D_CONFIG);
#endif /* !WD8013*/
outb(sc->we_io_nic_addr + WD_P0_RBCR0, 0);
outb(sc->we_io_nic_addr + WD_P0_RBCR1, 0);
outb(sc->we_io_nic_addr + WD_P0_RCR, WD_R_MON);
outb(sc->we_io_nic_addr + WD_P0_TCR, WD_T_CONFIG);
outb(sc->we_io_nic_addr + WD_P0_TPSR, 0);
outb(sc->we_io_nic_addr + WD_P0_PSTART, WD_TXBUF_SIZE);
outb(sc->we_io_nic_addr + WD_P0_PSTOP,
sc->we_vmem_size / WD_PAGE_SIZE);
outb(sc->we_io_nic_addr + WD_P0_BNRY, WD_TXBUF_SIZE);
outb(sc->we_io_nic_addr + WD_P0_ISR, 0xff);
outb(sc->we_io_nic_addr + WD_P0_IMR, WD_I_CONFIG);
wecmd.cs_ps = 1;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
for (i = 0; i < ETHER_ADDR_LEN; ++i)
outb(sc->we_io_nic_addr + WD_P1_PAR0 + i, sc->arpcom.ac_enaddr[i]);
for (i = 0; i < ETHER_ADDR_LEN; ++i) /* == broadcast addr */
outb(sc->we_io_nic_addr + WD_P1_MAR0 + i, 0xff);
outb(sc->we_io_nic_addr + WD_P1_CURR, WD_TXBUF_SIZE);
wecmd.cs_ps = 0;
wecmd.cs_stp = 0;
wecmd.cs_sta = 1;
wecmd.cs_rd = 0x4;
outb(sc->we_io_nic_addr + WD_P1_COMMAND, wecmd.cs_byte);
#if NBPFILTER > 0
if (sc->arpcom.ac_if.if_flags & IFF_PROMISC) {
outb(sc->we_io_nic_addr + WD_P0_RCR,
WD_R_PRO | WD_R_SEP | WD_R_AR | WD_R_CONFIG);
} else
#endif
outb(sc->we_io_nic_addr + WD_P0_RCR, WD_R_CONFIG);
/*
* Take the interface out of reset, program the vector,
* enable interrupts, and tell the world we are up.
*/
ifp->if_flags |= IFF_RUNNING;
sc->we_flags &= ~WDF_TXBUSY;
(void) splx(s);
westart(ifp);
}
/*
* Start output on interface.
*/
westart(ifp)
struct ifnet *ifp;
{
register struct we_softc *sc = &we_softc[ifp->if_unit];
struct mbuf *m0, *m;
register caddr_t buffer;
int len, s;
union we_command wecmd;
/*
* The DS8390 has only one transmit buffer, if it is busy we
* must wait until the transmit interrupt completes.
*/
s = splhigh();
if (sc->we_flags & WDF_TXBUSY) {
(void) splx(s);
return;
}
IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
if (m == 0) {
(void) splx(s);
return;
}
sc->we_flags |= WDF_TXBUSY;
(void) splx(s);
#if NBPFILTER > 0
if (sc->we_bpf) {
u_short etype;
int off, datasize, resid;
struct ether_header *eh;
struct trailer_header {
u_short ether_type;
u_short ether_residual;
} trailer_header;
char ether_packet[ETHERMTU+100];
char *ep;
ep = ether_packet;
/*
* We handle trailers below:
* Copy ether header first, then residual data,
* then data. Put all this in a temporary buffer
* 'ether_packet' and send off to bpf. Since the
* system has generated this packet, we assume
* that all of the offsets in the packet are
* correct; if they're not, the system will almost
* certainly crash in m_copydata.
* We make no assumptions about how the data is
* arranged in the mbuf chain (i.e. how much
* data is in each mbuf, if mbuf clusters are
* used, etc.), which is why we use m_copydata
* to get the ether header rather than assume
* that this is located in the first mbuf.
*/
/* copy ether header */
m_copydata(m, 0, sizeof(struct ether_header), ep);
eh = (struct ether_header *) ep;
ep += sizeof(struct ether_header);
etype = ntohs(eh->ether_type);
if (etype >= ETHERTYPE_TRAIL &&
etype < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
datasize = ((etype - ETHERTYPE_TRAIL) << 9);
off = datasize + sizeof(struct ether_header);
/* copy trailer_header into a data structure */
m_copydata(m, off, sizeof(struct trailer_header),
&trailer_header.ether_type);
/* copy residual data */
m_copydata(m, off+sizeof(struct trailer_header),
resid = ntohs(trailer_header.ether_residual) -
sizeof(struct trailer_header), ep);
ep += resid;
/* copy data */
m_copydata(m, sizeof(struct ether_header), datasize, ep);
ep += datasize;
/* restore original ether packet type */
eh->ether_type = trailer_header.ether_type;
bpf_tap(sc->we_bpf, ether_packet, ep - ether_packet);
} else
bpf_mtap(sc->we_bpf, m);
}
#endif
/*
* Copy the mbuf chain into the transmit buffer
*/
buffer = sc->we_vmem_addr;
len = 0;
for (m0 = m; m != 0; m = m->m_next) {
bcopy(mtod(m, caddr_t), buffer, m->m_len);
buffer += m->m_len;
len += m->m_len;
}
m_freem(m0);
/*
* Init transmit length registers, and set transmit start flag.
*/
s = splhigh();
len = MAX(len, ETHER_MIN_LEN);
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
wecmd.cs_ps = 0;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
outb(sc->we_io_nic_addr + WD_P0_TBCR0, len & 0xff);
outb(sc->we_io_nic_addr + WD_P0_TBCR1, len >> 8);
wecmd.cs_txp = 1;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
sc->arpcom.ac_if.if_timer = 3;
(void) splx(s);
}
/*
* Ethernet interface interrupt processor
*/
weintr(unit)
int unit;
{
register struct we_softc *sc = &we_softc[unit];
union we_command wecmd;
union we_interrupt weisr;
/* disable onboard interrupts, then get interrupt status */
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
wecmd.cs_ps = 0;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
weisr.is_byte = inb(sc->we_io_nic_addr + WD_P0_ISR);
loop:
outb(sc->we_io_nic_addr + WD_P0_ISR, weisr.is_byte);
/* transmit error */
if (weisr.is_txe) {
/* need to read these registers to clear status */
sc->arpcom.ac_if.if_collisions +=
inb(sc->we_io_nic_addr + WD_P0_TBCR0);
++sc->arpcom.ac_if.if_oerrors;
}
/* receiver error */
if (weisr.is_rxe) {
/* need to read these registers to clear status */
(void) inb(sc->we_io_nic_addr + 0xD);
(void) inb(sc->we_io_nic_addr + 0xE);
(void) inb(sc->we_io_nic_addr + 0xF);
++sc->arpcom.ac_if.if_ierrors;
}
/* normal transmit complete */
if (weisr.is_ptx || weisr.is_txe)
wetint (unit);
/* normal receive notification */
if (weisr.is_prx || weisr.is_rxe)
werint (unit);
/* try to start transmit */
westart(&sc->arpcom.ac_if);
/* re-enable onboard interrupts */
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
wecmd.cs_ps = 0;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
outb(sc->we_io_nic_addr + WD_P0_IMR, 0xff/*WD_I_CONFIG*/);
weisr.is_byte = inb(sc->we_io_nic_addr + WD_P0_ISR);
if (weisr.is_byte) goto loop;
}
/*
* Ethernet interface transmit interrupt.
*/
wetint(unit)
int unit;
{
register struct we_softc *sc = &we_softc[unit];
/*
* Do some statistics (assume page zero of NIC mapped in)
*/
sc->we_flags &= ~WDF_TXBUSY;
sc->arpcom.ac_if.if_timer = 0;
++sc->arpcom.ac_if.if_opackets;
sc->arpcom.ac_if.if_collisions += inb(sc->we_io_nic_addr + WD_P0_TBCR0);
}
/*
* Ethernet interface receiver interrupt.
*/
werint(unit)
int unit;
{
register struct we_softc *sc = &we_softc[unit];
u_char bnry, curr;
long len;
union we_command wecmd;
struct we_ring *wer;
/*
* Traverse the receive ring looking for packets to pass back.
* The search is complete when we find a descriptor not in use.
*/
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
wecmd.cs_ps = 0;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
bnry = inb(sc->we_io_nic_addr + WD_P0_BNRY);
wecmd.cs_ps = 1;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
curr = inb(sc->we_io_nic_addr + WD_P1_CURR);
if(Bdry[unit]) /* 19 Sep 92*/
bnry = Bdry[unit];
while (bnry != curr)
{
/* get pointer to this buffer header structure */
wer = (struct we_ring *)(sc->we_vmem_addr + (bnry << 8));
/* count includes CRC */
len = wer->we_count - 4;
if (len > 30 && len <= ETHERMTU+100)
weread(sc, (caddr_t)(wer + 1), len);
else printf("we%d: reject - bad length %d\n", unit, len);
outofbufs:
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
wecmd.cs_ps = 0;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
/* advance on chip Boundry register */
if((caddr_t) wer + WD_PAGE_SIZE - 1 > sc->we_vmem_end) {
bnry = WD_TXBUF_SIZE;
outb(sc->we_io_nic_addr + WD_P0_BNRY,
sc->we_vmem_size / WD_PAGE_SIZE-1);
} else {
if (len > 30 && len <= ETHERMTU+100)
bnry = wer->we_next_packet;
else bnry = curr;
/* watch out for NIC overflow, reset Boundry if invalid */
if ((bnry - 1) < WD_TXBUF_SIZE) {
outb(sc->we_io_nic_addr + WD_P0_BNRY,
(sc->we_vmem_size / WD_PAGE_SIZE) - 1);
bnry = WD_TXBUF_SIZE;
} else
outb(sc->we_io_nic_addr + WD_P0_BNRY, bnry-1);
}
/* refresh our copy of CURR */
wecmd.cs_ps = 1;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
curr = inb(sc->we_io_nic_addr + WD_P1_CURR);
}
Bdry[unit] = bnry; /* 19 Sep 92*/
}
/*
* Process an ioctl request.
*/
weioctl(ifp, cmd, data)
register struct ifnet *ifp;
int cmd;
caddr_t data;
{
register struct ifaddr *ifa = (struct ifaddr *)data;
struct we_softc *sc = &we_softc[ifp->if_unit];
struct ifreq *ifr = (struct ifreq *)data;
int s = splimp(), error = 0;
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
weinit(ifp->if_unit); /* before arpwhohas */
((struct arpcom *)ifp)->ac_ipaddr =
IA_SIN(ifa)->sin_addr;
arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr);
break;
#endif
#ifdef NS
case AF_NS:
{
register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
if (ns_nullhost(*ina))
ina->x_host =
*(union ns_host *)(sc->arpcom.ac_enaddr);
else {
/*
* The manual says we cant change the address
* while the receiver is armed,
* so reset everything
*/
ifp->if_flags &= ~IFF_RUNNING;
bcopy((caddr_t)ina->x_host.c_host,
(caddr_t)sc->arpcom.ac_enaddr,
sizeof(sc->arpcom.ac_enaddr));
}
weinit(ifp->if_unit); /* does ne_setaddr() */
break;
}
#endif
default:
weinit(ifp->if_unit);
break;
}
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 &&
ifp->if_flags & IFF_RUNNING) {
ifp->if_flags &= ~IFF_RUNNING;
westop(ifp->if_unit);
} else if (ifp->if_flags & IFF_UP &&
(ifp->if_flags & IFF_RUNNING) == 0)
weinit(ifp->if_unit);
#if NBPFILTER > 0
if (sc->arpcom.ac_if.if_flags & IFF_PROMISC) {
outb(sc->we_io_nic_addr + WD_P0_RCR,
WD_R_PRO | WD_R_SEP | WD_R_AR | WD_R_CONFIG);
} else
#endif
outb(sc->we_io_nic_addr + WD_P0_RCR, WD_R_CONFIG);
break;
#ifdef notdef
case SIOCGHWADDR:
bcopy((caddr_t)sc->sc_addr, (caddr_t) &ifr->ifr_data,
sizeof(sc->sc_addr));
break;
#endif
default:
error = EINVAL;
}
splx(s);
return (error);
}
/*
* set ethernet address for unit
*/
wesetaddr(physaddr, unit)
u_char *physaddr;
int unit;
{
register struct we_softc *sc = &we_softc[unit];
register int i;
/*
* Rewrite ethernet address, and then force restart of NIC
*/
for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->arpcom.ac_enaddr[i] = physaddr[i];
sc->we_flags &= ~WDF_RUNNING;
weinit(unit);
}
#define ringoffset(sc, eh, off, type) \
((type)( ((caddr_t)(eh)+(off) >= (sc)->we_vmem_end) ? \
(((caddr_t)(eh)+(off))) - (sc)->we_vmem_end \
+ (sc)->we_vmem_ring: \
((caddr_t)(eh)+(off)) ))
/*
* Pass a packet to the higher levels.
* We deal with the trailer protocol here.
*/
weread(sc, buf, len)
register struct we_softc *sc;
char *buf;
int len;
{
caddr_t we_ring_copy();
struct ether_header *eh;
struct mbuf *m, *head, *we_ring_to_mbuf();
int off, resid;
u_short etype;
struct trailer_header {
u_short trail_type;
u_short trail_residual;
} trailer_header;
++sc->arpcom.ac_if.if_ipackets;
/* Allocate a header mbuf */
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
goto bad;
m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
m->m_pkthdr.len = len;
m->m_len = 0;
head = m;
eh = (struct ether_header *)buf;
#define EROUND ((sizeof(struct ether_header) + 3) & ~3)
#define EOFF (EROUND - sizeof(struct ether_header))
/*
* The following assumes there is room for
* the ether header in the header mbuf
*/
head->m_data += EOFF;
bcopy(buf, mtod(head, caddr_t), sizeof(struct ether_header));
buf += sizeof(struct ether_header);
head->m_len += sizeof(struct ether_header);
len -= sizeof(struct ether_header);
etype = ntohs((u_short)eh->ether_type);
/*
* Deal with trailer protocol:
* If trailer protocol, calculate the datasize as 'off',
* which is also the offset to the trailer header.
* Set resid to the amount of packet data following the
* trailer header.
* Finally, copy residual data into mbuf chain.
*/
if (etype >= ETHERTYPE_TRAIL &&
etype < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
off = (etype - ETHERTYPE_TRAIL) << 9;
if ((off + sizeof(struct trailer_header)) > len)
goto bad; /* insanity */
eh->ether_type = *ringoffset(sc, buf, off, u_short *);
resid = ntohs(*ringoffset(sc, buf, off+2, u_short *));
if ((off + resid) > len) goto bad; /* insanity */
resid -= sizeof(struct trailer_header);
if (resid < 0) goto bad; /* insanity */
m = we_ring_to_mbuf(sc, ringoffset(sc, buf, off+4, char *), head, resid);
if (m == 0) goto bad;
len = off;
head->m_pkthdr.len -= 4; /* subtract trailer header */
}
/*
* Pull packet off interface. Or if this was a trailer packet,
* the data portion is appended.
*/
m = we_ring_to_mbuf(sc, buf, m, len);
if (m == 0) goto bad;
#if NBPFILTER > 0
/*
* Check if there's a bpf filter listening on this interface.
* If so, hand off the raw packet to bpf.
*/
if (sc->we_bpf) {
bpf_mtap(sc->we_bpf, head);
}
/*
* Note that the interface cannot be in promiscuous mode if
* there are no bpf listeners. And if we are in promiscuous
* mode, we have to check if this packet is really ours.
*
* XXX This test does not support multicasts.
*/
if ((sc->arpcom.ac_if.if_flags & IFF_PROMISC) &&
bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr,
sizeof(eh->ether_dhost)) != 0 &&
bcmp(eh->ether_dhost, etherbroadcastaddr,
sizeof(eh->ether_dhost)) != 0) {
m_freem(head);
return;
}
#endif
/*
* Fix up data start offset in mbuf to point past ether header
*/
m_adj(head, sizeof(struct ether_header));
/*
* silly ether_input routine needs 'type' in host byte order
*/
eh->ether_type = ntohs(eh->ether_type);
ether_input(&sc->arpcom.ac_if, eh, head);
return;
bad: if (head)
m_freem(head);
return;
}
/*
* Supporting routines
*/
/*
* Copy data from receive buffer to end of mbuf chain
* allocate additional mbufs as needed. return pointer
* to last mbuf in chain.
* sc = we info
* src = pointer in we ring buffer
* dst = pointer to last mbuf in mbuf chain to copy to
* amount = amount of data to copy
*/
struct mbuf *
we_ring_to_mbuf(sc,src,dst,total_len)
struct we_softc *sc;
char *src;
struct mbuf *dst;
int total_len;
{
register struct mbuf *m = dst;
while (total_len > 0) {
register int amount = min(total_len, M_TRAILINGSPACE(m));
if (amount == 0) { /* no more data in this mbuf, alloc another */
/*
* if there is enough data for an mbuf cluster, attempt
* to allocate one of those, otherwise, a regular mbuf
* will do.
*/
dst = m;
MGET(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return (0);
if (total_len >= MINCLSIZE)
MCLGET(m, M_DONTWAIT);
m->m_len = 0;
dst->m_next = m;
amount = min(total_len, M_TRAILINGSPACE(m));
}
src = we_ring_copy(sc, src, mtod(m, caddr_t) + m->m_len, amount);
m->m_len += amount;
total_len -= amount;
}
return (m);
}
static inline char *
we_ring_copy(sc,src,dst,amount)
struct we_softc *sc;
char *src;
char *dst;
int amount;
{
int tmp_amount;
/* does copy wrap to lower addr in ring buffer? */
if (src + amount > sc->we_vmem_end) {
tmp_amount = sc->we_vmem_end - src;
bcopy(src,dst,tmp_amount); /* copy amount up to end */
amount -= tmp_amount;
src = sc->we_vmem_ring;
dst += tmp_amount;
}
bcopy(src, dst, amount);
return(src + amount);
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.