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NetBSD/sys/arch/vax/if/if_qe.c

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/* $NetBSD: if_qe.c,v 1.10 1996/02/02 18:59:20 mycroft Exp $ */
/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Digital Equipment Corp.
*
* 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_qe.c 7.20 (Berkeley) 3/28/91
*/
/* from @(#)if_qe.c 1.15 (ULTRIX) 4/16/86 */
/****************************************************************
* *
* Licensed from Digital Equipment Corporation *
* Copyright (c) *
* Digital Equipment Corporation *
* Maynard, Massachusetts *
* 1985, 1986 *
* All rights reserved. *
* *
* The Information in this software is subject to change *
* without notice and should not be construed as a commitment *
* by Digital Equipment Corporation. Digital makes no *
* representations about the suitability of this software for *
* any purpose. It is supplied "As Is" without expressed or *
* implied warranty. *
* *
* If the Regents of the University of California or its *
* licensees modify the software in a manner creating *
* derivative copyright rights, appropriate copyright *
* legends may be placed on the derivative work in addition *
* to that set forth above. *
* *
****************************************************************/
/* ---------------------------------------------------------------------
* Modification History
*
* 15-Apr-86 -- afd
* Rename "unused_multi" to "qunused_multi" for extending Generic
* kernel to MicroVAXen.
*
* 18-mar-86 -- jaw br/cvec changed to NOT use registers.
*
* 12 March 86 -- Jeff Chase
* Modified to handle the new MCLGET macro
* Changed if_qe_data.c to use more receive buffers
* Added a flag to poke with adb to log qe_restarts on console
*
* 19 Oct 85 -- rjl
* Changed the watch dog timer from 30 seconds to 3. VMS is using
* less than 1 second in their's. Also turned the printf into an
* mprintf.
*
* 09/16/85 -- Larry Cohen
* Add 43bsd alpha tape changes for subnet routing
*
* 1 Aug 85 -- rjl
* Panic on a non-existent memory interrupt and the case where a packet
* was chained. The first should never happen because non-existant
* memory interrupts cause a bus reset. The second should never happen
* because we hang 2k input buffers on the device.
*
* 1 Aug 85 -- rich
* Fixed the broadcast loopback code to handle Clusters without
* wedging the system.
*
* 27 Feb. 85 -- ejf
* Return default hardware address on ioctl request.
*
* 12 Feb. 85 -- ejf
* Added internal extended loopback capability.
*
* 27 Dec. 84 -- rjl
* Fixed bug that caused every other transmit descriptor to be used
* instead of every descriptor.
*
* 21 Dec. 84 -- rjl
* Added watchdog timer to mask hardware bug that causes device lockup.
*
* 18 Dec. 84 -- rjl
* Reworked driver to use q-bus mapping routines. MicroVAX-I now does
* copying instead of m-buf shuffleing.
* A number of deficencies in the hardware/firmware were compensated
* for. See comments in qestart and qerint.
*
* 14 Nov. 84 -- jf
* Added usage counts for multicast addresses.
* Updated general protocol support to allow access to the Ethernet
* header.
*
* 04 Oct. 84 -- jf
* Added support for new ioctls to add and delete multicast addresses
* and set the physical address.
* Add support for general protocols.
*
* 14 Aug. 84 -- rjl
* Integrated Shannon changes. (allow arp above 1024 and ? )
*
* 13 Feb. 84 -- rjl
*
* Initial version of driver. derived from IL driver.
*
* ---------------------------------------------------------------------
*/
/*
* Digital Q-BUS to NI Adapter
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/buf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <net/if.h>
#include <net/netisr.h>
#include <net/route.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
#ifdef ISO
#include <netiso/iso.h>
#include <netiso/iso_var.h>
extern char all_es_snpa[], all_is_snpa[], all_l1is_snpa[], all_l2is_snpa[];
#endif
#include <machine/pte.h>
#include <machine/cpu.h>
#include <machine/mtpr.h>
#include <vax/if/if_qereg.h>
#include <vax/if/if_uba.h>
#include <vax/uba/ubareg.h>
#include <vax/uba/ubavar.h>
#define NRCV 15 /* Receive descriptors */
#define NXMT 5 /* Transmit descriptors */
#define NTOT (NXMT + NRCV)
#define QETIMEOUT 2 /* transmit timeout, must be > 1 */
#define QESLOWTIMEOUT 40 /* timeout when no xmits in progress */
#define MINDATA 60
void qetimeout(int);
/*
* 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 qe_softc {
struct device qe_device; /* Configuration common part */
struct arpcom qe_ac; /* Ethernet common part */
#define qe_if qe_ac.ac_if /* network-visible interface */
#define qe_addr qe_ac.ac_enaddr /* hardware Ethernet address */
struct ifubinfo qe_uba; /* Q-bus resources */
struct ifrw qe_ifr[NRCV]; /* for receive buffers; */
struct ifxmt qe_ifw[NXMT]; /* for xmit buffers; */
struct qedevice *qe_vaddr;
int qe_flags; /* software state */
#define QEF_RUNNING 0x01
#define QEF_SETADDR 0x02
#define QEF_FASTTIMEO 0x04
int setupaddr; /* mapping info for setup pkts */
int ipl; /* interrupt priority */
struct qe_ring *rringaddr; /* mapping info for rings */
struct qe_ring *tringaddr; /* "" */
struct qe_ring rring[NRCV+1]; /* Receive ring descriptors */
struct qe_ring tring[NXMT+1]; /* Xmit ring descriptors */
u_char setup_pkt[16][8]; /* Setup packet */
int rindex; /* Receive index */
int tindex; /* Transmit index */
int otindex; /* Old transmit index */
int qe_intvec; /* Interrupt vector */
struct qedevice *addr; /* device addr */
int setupqueued; /* setup packet queued */
int nxmit; /* Transmits in progress */
int qe_restarts; /* timeouts */
};
int qematch __P((struct device *, void *, void *));
void qeattach __P((struct device *, struct device *, void *));
int qereset __P((int));
void qeinit __P((int));
void qestart __P((struct ifnet *));
void qeintr __P((int));
void qetint __P((int));
void qerint __P((int));
int qeioctl __P((struct ifnet *, u_long, caddr_t));
void qe_setaddr __P((u_char *, int));
void qeinitdesc __P((struct qe_ring *, caddr_t, int));
void qesetup __P((struct qe_softc *));
void qeread __P((struct qe_softc *, struct ifrw *, int));
void qetimeout __P((int));
void qerestart __P((struct qe_softc *));
struct cfdriver qecd =
{ 0, "qe", qematch, qeattach, DV_IFNET, sizeof(struct qe_softc) };
#define QEUNIT(x) minor(x)
/*
* The deqna shouldn't receive more than ETHERMTU + sizeof(struct ether_header)
* but will actually take in up to 2048 bytes. To guard against the receiver
* chaining buffers (which we aren't prepared to handle) we allocate 2kb
* size buffers.
*/
#define MAXPACKETSIZE 2048 /* Should really be ETHERMTU */
/*
* Probe the QNA to see if it's there
*/
int
qematch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct qe_softc *sc = match;
struct uba_attach_args *ua = aux;
struct uba_softc *ubasc = (struct uba_softc *)parent;
struct qe_ring *rp;
struct qe_ring *prp; /* physical rp */
volatile struct qedevice *addr = (struct qedevice *)ua->ua_addr;
int i;
/*
* The QNA interrupts on i/o operations. To do an I/O operation
* we have to setup the interface by transmitting a setup packet.
*/
addr->qe_csr = QE_RESET;
addr->qe_csr &= ~QE_RESET;
addr->qe_vector = (ubasc->uh_lastiv -= 4);
/*
* Map the communications area and the setup packet.
*/
sc->setupaddr =
uballoc(0, (caddr_t)sc->setup_pkt, sizeof(sc->setup_pkt), 0);
sc->rringaddr = (struct qe_ring *) uballoc(0, (caddr_t)sc->rring,
sizeof(struct qe_ring) * (NTOT+2), 0);
prp = (struct qe_ring *)UBAI_ADDR((int)sc->rringaddr);
/*
* The QNA will loop the setup packet back to the receive ring
* for verification, therefore we initialize the first
* receive & transmit ring descriptors and link the setup packet
* to them.
*/
qeinitdesc(sc->tring, (caddr_t)UBAI_ADDR(sc->setupaddr),
sizeof(sc->setup_pkt));
qeinitdesc(sc->rring, (caddr_t)UBAI_ADDR(sc->setupaddr),
sizeof(sc->setup_pkt));
rp = (struct qe_ring *)sc->tring;
rp->qe_setup = 1;
rp->qe_eomsg = 1;
rp->qe_flag = rp->qe_status1 = QE_NOTYET;
rp->qe_valid = 1;
rp = (struct qe_ring *)sc->rring;
rp->qe_flag = rp->qe_status1 = QE_NOTYET;
rp->qe_valid = 1;
/*
* Get the addr off of the interface and place it into the setup
* packet. This code looks strange due to the fact that the address
* is placed in the setup packet in col. major order.
*/
for (i = 0; i < 6; i++)
sc->setup_pkt[i][1] = addr->qe_sta_addr[i];
qesetup(sc);
/*
* Start the interface and wait for the packet.
*/
addr->qe_csr = QE_INT_ENABLE | QE_XMIT_INT | QE_RCV_INT;
addr->qe_rcvlist_lo = (short)((int)prp);
addr->qe_rcvlist_hi = (short)((int)prp >> 16);
prp += NRCV+1;
addr->qe_xmtlist_lo = (short)((int)prp);
addr->qe_xmtlist_hi = (short)((int)prp >> 16);
DELAY(10000);
/*
* All done with the bus resources.
*/
ubarelse(0, &sc->setupaddr);
ubarelse(0, (int *)&sc->rringaddr);
sc->ipl = 0x15;
ua->ua_ivec = qeintr;
ua->ua_iarg = sc->qe_device.dv_unit;
return 1;
}
/*
* Interface exists: make available by filling in network interface
* record. System will initialize the interface when it is ready
* to accept packets.
*/
void
qeattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct uba_attach_args *ua = aux;
struct qe_softc *sc = (struct qe_softc *)self;
struct ifnet *ifp = (struct ifnet *)&sc->qe_if;
struct qedevice *addr =(struct qedevice *)ua->ua_addr;
int i;
printf("\n");
sc->qe_vaddr = addr;
ifp->if_unit = sc->qe_device.dv_unit;
ifp->if_name = "qe";
/*
* The Deqna is cable of transmitting broadcasts, but
* doesn't listen to its own.
*/
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS;
/*
* Read the address from the prom and save it.
*/
for (i = 0; i < 6; i++)
sc->setup_pkt[i][1] = sc->qe_addr[i] =
addr->qe_sta_addr[i] & 0xff;
addr->qe_vector |= 1;
printf("qe%d: %s, hardware address %s\n", sc->qe_device.dv_unit,
addr->qe_vector&01 ? "delqa":"deqna",
ether_sprintf(sc->qe_addr));
addr->qe_vector &= ~1;
/*
* Save the vector for initialization at reset time.
*/
sc->qe_intvec = addr->qe_vector;
ifp->if_start = qestart;
ifp->if_ioctl = qeioctl;
ifp->if_reset = qereset;
ifp->if_watchdog = qetimeout;
sc->qe_uba.iff_flags = UBA_CANTWAIT;
if_attach(ifp);
ether_ifattach(ifp);
}
/*
* Reset of interface after UNIBUS reset.
* If interface is on specified uba, reset its state.
*/
qereset(unit)
int unit;
{
register struct uba_device *ui;
panic("qereset");
#ifdef notyet
if (unit >= NQE || (ui = qeinfo[unit]) == 0 || ui->ui_alive == 0 ||
ui->ui_ubanum != uban)
return;
printf(" qe%d", unit);
qe_softc[unit].qe_if.if_flags &= ~IFF_RUNNING;
qeinit(unit);
#endif
}
/*
* Initialization of interface.
*/
void
qeinit(unit)
int unit;
{
struct qe_softc *sc = (struct qe_softc *)qecd.cd_devs[unit];
struct qedevice *addr = sc->qe_vaddr;
struct ifnet *ifp = (struct ifnet *)&sc->qe_if;
int i;
int s;
/* address not known */
if (ifp->if_addrlist.tqh_first == (struct ifaddr *)0)
return;
if (sc->qe_flags & QEF_RUNNING)
return;
if ((ifp->if_flags & IFF_RUNNING) == 0) {
/*
* map the communications area onto the device
*/
i = uballoc(0, (caddr_t)sc->rring,
sizeof(struct qe_ring) * (NTOT+2), 0);
if (i == 0)
goto fail;
sc->rringaddr = (struct qe_ring *)UBAI_ADDR(i);
sc->tringaddr = sc->rringaddr + NRCV + 1;
i = uballoc(0, (caddr_t)sc->setup_pkt,
sizeof(sc->setup_pkt), 0);
if (i == 0)
goto fail;
sc->setupaddr = UBAI_ADDR(i);
/*
* init buffers and maps
*/
if (if_ubaminit(&sc->qe_uba, sc->qe_device.dv_parent->dv_unit,
sizeof (struct ether_header), (int)btoc(MAXPACKETSIZE),
sc->qe_ifr, NRCV, sc->qe_ifw, NXMT) == 0) {
fail:
printf("qe%d: can't allocate uba resources\n", unit);
sc->qe_if.if_flags &= ~IFF_UP;
return;
}
}
/*
* Init the buffer descriptors and indexes for each of the lists and
* loop them back to form a ring.
*/
for (i = 0; i < NRCV; i++) {
qeinitdesc( &sc->rring[i],
(caddr_t)UBAI_ADDR(sc->qe_ifr[i].ifrw_info), MAXPACKETSIZE);
sc->rring[i].qe_flag = sc->rring[i].qe_status1 = QE_NOTYET;
sc->rring[i].qe_valid = 1;
}
qeinitdesc(&sc->rring[i], (caddr_t)NULL, 0);
sc->rring[i].qe_addr_lo = (short)((int)sc->rringaddr);
sc->rring[i].qe_addr_hi = (short)((int)sc->rringaddr >> 16);
sc->rring[i].qe_chain = 1;
sc->rring[i].qe_flag = sc->rring[i].qe_status1 = QE_NOTYET;
sc->rring[i].qe_valid = 1;
for( i = 0 ; i <= NXMT ; i++ )
qeinitdesc(&sc->tring[i], (caddr_t)NULL, 0);
i--;
sc->tring[i].qe_addr_lo = (short)((int)sc->tringaddr);
sc->tring[i].qe_addr_hi = (short)((int)sc->tringaddr >> 16);
sc->tring[i].qe_chain = 1;
sc->tring[i].qe_flag = sc->tring[i].qe_status1 = QE_NOTYET;
sc->tring[i].qe_valid = 1;
sc->nxmit = sc->otindex = sc->tindex = sc->rindex = 0;
/*
* Take the interface out of reset, program the vector,
* enable interrupts, and tell the world we are up.
*/
s = splnet();
addr->qe_vector = sc->qe_intvec;
sc->addr = addr;
addr->qe_csr = QE_RCV_ENABLE | QE_INT_ENABLE | QE_XMIT_INT |
QE_RCV_INT | QE_ILOOP;
addr->qe_rcvlist_lo = (short)((int)sc->rringaddr);
addr->qe_rcvlist_hi = (short)((int)sc->rringaddr >> 16);
ifp->if_flags |= IFF_UP | IFF_RUNNING;
sc->qe_flags |= QEF_RUNNING;
qesetup( sc );
qestart( ifp );
sc->qe_if.if_timer = QESLOWTIMEOUT; /* Start watchdog */
splx( s );
}
/*
* Start output on interface.
*
*/
void
qestart(ifp)
struct ifnet *ifp;
{
int unit = ifp->if_unit;
register struct qe_softc *sc = qecd.cd_devs[ifp->if_unit];
volatile struct qedevice *addr = sc->qe_vaddr;
register struct qe_ring *rp;
register index;
struct mbuf *m;
int buf_addr, len, s;
s = splnet();
/*
* The deqna doesn't look at anything but the valid bit
* to determine if it should transmit this packet. If you have
* a ring and fill it the device will loop indefinately on the
* packet and continue to flood the net with packets until you
* break the ring. For this reason we never queue more than n-1
* packets in the transmit ring.
*
* The microcoders should have obeyed their own defination of the
* flag and status words, but instead we have to compensate.
*/
for( index = sc->tindex;
sc->tring[index].qe_valid == 0 && sc->nxmit < (NXMT-1) ;
sc->tindex = index = ++index % NXMT){
rp = &sc->tring[index];
if( sc->setupqueued ) {
buf_addr = sc->setupaddr;
len = 128;
rp->qe_setup = 1;
sc->setupqueued = 0;
} else {
IF_DEQUEUE(&sc->qe_if.if_snd, m);
if (m == 0) {
splx(s);
return;
}
buf_addr = sc->qe_ifw[index].ifw_info;
len = if_ubaput(&sc->qe_uba, &sc->qe_ifw[index], m);
}
if( len < MINDATA )
len = MINDATA;
/*
* Does buffer end on odd byte ?
*/
if( len & 1 ) {
len++;
rp->qe_odd_end = 1;
}
rp->qe_buf_len = -(len/2);
buf_addr = UBAI_ADDR(buf_addr);
rp->qe_flag = rp->qe_status1 = QE_NOTYET;
rp->qe_addr_lo = (short)buf_addr;
rp->qe_addr_hi = (short)(buf_addr >> 16);
rp->qe_eomsg = 1;
rp->qe_flag = rp->qe_status1 = QE_NOTYET;
rp->qe_valid = 1;
if (sc->nxmit++ == 0) {
sc->qe_flags |= QEF_FASTTIMEO;
sc->qe_if.if_timer = QETIMEOUT;
}
/*
* See if the xmit list is invalid.
*/
if( addr->qe_csr & QE_XL_INVALID ) {
buf_addr = (int)(sc->tringaddr+index);
addr->qe_xmtlist_lo = (short)buf_addr;
addr->qe_xmtlist_hi = (short)(buf_addr >> 16);
}
}
splx(s);
return;
}
/*
* Ethernet interface interrupt processor
*/
void
qeintr(unit)
int unit;
{
register struct qe_softc *sc;
volatile struct qedevice *addr;
int buf_addr, csr;
sc = qecd.cd_devs[unit];
addr = sc->qe_vaddr;
splx(sc->ipl);
if (!(sc->qe_flags & QEF_FASTTIMEO))
sc->qe_if.if_timer = QESLOWTIMEOUT; /* Restart timer clock */
csr = addr->qe_csr;
addr->qe_csr = QE_RCV_ENABLE | QE_INT_ENABLE |
QE_XMIT_INT | QE_RCV_INT | QE_ILOOP;
if (csr & QE_RCV_INT)
qerint(unit);
if (csr & QE_XMIT_INT)
qetint(unit );
if (csr & QE_NEX_MEM_INT)
printf("qe%d: Nonexistent memory interrupt\n", unit);
if (addr->qe_csr & QE_RL_INVALID && sc->rring[sc->rindex].qe_status1 ==
QE_NOTYET) {
buf_addr = (int)&sc->rringaddr[sc->rindex];
addr->qe_rcvlist_lo = (short)buf_addr;
addr->qe_rcvlist_hi = (short)(buf_addr >> 16);
}
}
/*
* Ethernet interface transmit interrupt.
*/
void
qetint(unit)
int unit;
{
register struct qe_softc *sc = qecd.cd_devs[unit];
register struct qe_ring *rp;
register struct ifxmt *ifxp;
int status1, setupflag;
short len;
while (sc->otindex != sc->tindex && sc->tring[sc->otindex].qe_status1
!= QE_NOTYET && sc->nxmit > 0) {
/*
* Save the status words from the descriptor so that it can
* be released.
*/
rp = &sc->tring[sc->otindex];
status1 = rp->qe_status1;
setupflag = rp->qe_setup;
len = (-rp->qe_buf_len) * 2;
if( rp->qe_odd_end )
len++;
/*
* Init the buffer descriptor
*/
bzero((caddr_t)rp, sizeof(struct qe_ring));
if( --sc->nxmit == 0 ) {
sc->qe_flags &= ~QEF_FASTTIMEO;
sc->qe_if.if_timer = QESLOWTIMEOUT;
}
if( !setupflag ) {
/*
* Do some statistics.
*/
sc->qe_if.if_opackets++;
sc->qe_if.if_collisions += ( status1 & QE_CCNT ) >> 4;
if (status1 & QE_ERROR)
sc->qe_if.if_oerrors++;
ifxp = &sc->qe_ifw[sc->otindex];
if (ifxp->ifw_xtofree) {
m_freem(ifxp->ifw_xtofree);
ifxp->ifw_xtofree = 0;
}
}
sc->otindex = ++sc->otindex % NXMT;
}
qestart(&sc->qe_if);
}
/*
* Ethernet interface receiver interrupt.
* If can't determine length from type, then have to drop packet.
* Othewise decapsulate packet based on type and pass to type specific
* higher-level input routine.
*/
void
qerint(unit)
int unit;
{
register struct qe_softc *sc = qecd.cd_devs[unit];
register struct qe_ring *rp;
register int nrcv = 0;
int len, status1, status2;
int bufaddr;
/*
* Traverse the receive ring looking for packets to pass back.
* The search is complete when we find a descriptor not in use.
*
* As in the transmit case the deqna doesn't honor it's own protocols
* so there exists the possibility that the device can beat us around
* the ring. The proper way to guard against this is to insure that
* there is always at least one invalid descriptor. We chose instead
* to make the ring large enough to minimize the problem. With a ring
* size of 4 we haven't been able to see the problem. To be safe we
* doubled that to 8.
*
*/
while (sc->rring[sc->rindex].qe_status1 == QE_NOTYET && nrcv < NRCV) {
/*
* We got an interrupt but did not find an input packet
* where we expected one to be, probably because the ring
* was overrun.
* We search forward to find a valid packet and start
* processing from there. If no valid packet is found it
* means we processed all the packets during a previous
* interrupt and that the QE_RCV_INT bit was set while
* we were processing one of these earlier packets. In
* this case we can safely ignore the interrupt (by dropping
* through the code below).
*/
sc->rindex = (sc->rindex + 1) % NRCV;
nrcv++;
}
if (nrcv && nrcv < NRCV)
log(LOG_ERR, "qe%d: ring overrun, resync'd by skipping %d\n",
unit, nrcv);
for (; sc->rring[sc->rindex].qe_status1 != QE_NOTYET;
sc->rindex = ++sc->rindex % NRCV) {
rp = &sc->rring[sc->rindex];
status1 = rp->qe_status1;
status2 = rp->qe_status2;
bzero((caddr_t)rp, sizeof(struct qe_ring));
if( (status1 & QE_MASK) == QE_MASK )
panic("qe: chained packet");
len = ((status1 & QE_RBL_HI) | (status2 & QE_RBL_LO)) + 60;
sc->qe_if.if_ipackets++;
if (status1 & QE_ERROR) {
if ((status1 & QE_RUNT) == 0)
sc->qe_if.if_ierrors++;
} else {
/*
* We don't process setup packets.
*/
if (!(status1 & QE_ESETUP))
qeread(sc, &sc->qe_ifr[sc->rindex],
len - sizeof(struct ether_header));
}
/*
* Return the buffer to the ring
*/
bufaddr = (int)UBAI_ADDR(sc->qe_ifr[sc->rindex].ifrw_info);
rp->qe_buf_len = -((MAXPACKETSIZE)/2);
rp->qe_addr_lo = (short)bufaddr;
rp->qe_addr_hi = (short)((int)bufaddr >> 16);
rp->qe_flag = rp->qe_status1 = QE_NOTYET;
rp->qe_valid = 1;
}
}
/*
* Process an ioctl request.
*/
int
qeioctl(ifp, cmd, data)
register struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
struct qe_softc *sc = qecd.cd_devs[ifp->if_unit];
struct ifaddr *ifa = (struct ifaddr *)data;
int s = splnet(), error = 0;
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
qeinit(ifp->if_unit);
switch(ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
arp_ifinit(&sc->qe_ac, ifa);
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->qe_addr);
else
qe_setaddr(ina->x_host.c_host, ifp->if_unit);
break;
}
#endif
}
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 &&
sc->qe_flags & QEF_RUNNING) {
sc->qe_vaddr->qe_csr = QE_RESET;
sc->qe_flags &= ~QEF_RUNNING;
} else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) ==
IFF_RUNNING && (sc->qe_flags & QEF_RUNNING) == 0)
qerestart(sc);
break;
default:
error = EINVAL;
}
splx(s);
return (error);
}
/*
* set ethernet address for unit
*/
void
qe_setaddr(physaddr, unit)
u_char *physaddr;
int unit;
{
register struct qe_softc *sc = qecd.cd_devs[unit];
register int i;
for (i = 0; i < 6; i++)
sc->setup_pkt[i][1] = sc->qe_addr[i] = physaddr[i];
sc->qe_flags |= QEF_SETADDR;
if (sc->qe_if.if_flags & IFF_RUNNING)
qesetup(sc);
qeinit(unit);
}
/*
* Initialize a ring descriptor with mbuf allocation side effects
*/
void
qeinitdesc(rp, addr, len)
register struct qe_ring *rp;
caddr_t addr; /* mapped address */
int len;
{
/*
* clear the entire descriptor
*/
bzero((caddr_t)rp, sizeof(struct qe_ring));
if (len) {
rp->qe_buf_len = -(len/2);
rp->qe_addr_lo = (short)((int)addr);
rp->qe_addr_hi = (short)((int)addr >> 16);
}
}
/*
* Build a setup packet - the physical address will already be present
* in first column.
*/
void
qesetup(sc)
struct qe_softc *sc;
{
register i, j;
/*
* Copy the target address to the rest of the entries in this row.
*/
for (j = 0; j < 6; j++)
for (i = 2; i < 8; i++)
sc->setup_pkt[j][i] = sc->setup_pkt[j][1];
/*
* Duplicate the first half.
*/
bcopy((caddr_t)sc->setup_pkt[0], (caddr_t)sc->setup_pkt[8], 64);
/*
* Fill in the broadcast (and ISO multicast) address(es).
*/
for (i = 0; i < 6; i++) {
sc->setup_pkt[i][2] = 0xff;
#ifdef ISO
sc->setup_pkt[i][3] = all_es_snpa[i];
sc->setup_pkt[i][4] = all_is_snpa[i];
sc->setup_pkt[i][5] = all_l1is_snpa[i];
sc->setup_pkt[i][6] = all_l2is_snpa[i];
#endif
}
sc->setupqueued++;
}
/*
* Pass a packet to the higher levels.
* We deal with the trailer protocol here.
*/
void
qeread(sc, ifrw, len)
register struct qe_softc *sc;
struct ifrw *ifrw;
int len;
{
struct ether_header *eh;
struct mbuf *m;
int s;
struct ifqueue *inq;
/*
* Deal with trailer protocol: if type is INET trailer
* get true type from first 16-bit word past data.
* Remember that type was trailer by setting off.
*/
eh = (struct ether_header *)ifrw->ifrw_addr;
if (len == 0)
return;
/*
* Pull packet off interface. Off is nonzero if packet
* has trailing header; qeget will then force this header
* information to be at the front, but we still have to drop
* the type and length which are at the front of any trailer data.
*/
m = if_ubaget(&sc->qe_uba, ifrw, len, &sc->qe_if);
#ifdef notdef
if (m) {
*(((u_long *)m->m_data)+0),
*(((u_long *)m->m_data)+1),
*(((u_long *)m->m_data)+2),
*(((u_long *)m->m_data)+3)
); }
#endif
if (m)
ether_input((struct ifnet *)&sc->qe_if, eh, m);
}
/*
* Watchdog timeout routine. There is a condition in the hardware that
* causes the board to lock up under heavy load. This routine detects
* the hang up and restarts the device.
*/
void
qetimeout(unit)
int unit;
{
register struct qe_softc *sc;
sc = qecd.cd_devs[unit];
#ifdef notdef
log(LOG_ERR, "qe%d: transmit timeout, restarted %d\n",
unit, sc->qe_restarts++);
#endif
qerestart(sc);
}
/*
* Restart for board lockup problem.
*/
void
qerestart(sc)
struct qe_softc *sc;
{
register struct ifnet *ifp = (struct ifnet *)&sc->qe_if;
register struct qedevice *addr = sc->addr;
register struct qe_ring *rp;
register i;
addr->qe_csr = QE_RESET;
addr->qe_csr &= ~QE_RESET;
qesetup(sc);
for (i = 0, rp = sc->tring; i < NXMT; rp++, i++) {
rp->qe_flag = rp->qe_status1 = QE_NOTYET;
rp->qe_valid = 0;
}
sc->nxmit = sc->otindex = sc->tindex = sc->rindex = 0;
addr->qe_csr = QE_RCV_ENABLE | QE_INT_ENABLE | QE_XMIT_INT |
QE_RCV_INT | QE_ILOOP;
addr->qe_rcvlist_lo = (short)((int)sc->rringaddr);
addr->qe_rcvlist_hi = (short)((int)sc->rringaddr >> 16);
sc->qe_flags |= QEF_RUNNING;
qestart(ifp);
}
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