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- /*
- * Copyright (c) 1989 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Excelan Inc.
- *
- * 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_ex.c 7.5 (Berkeley) 12/16/90
- */
-
- #include "ex.h"
-
- #if NEX > 0
-
- /*
- * Excelan EXOS 202(VME) & 203(QBUS) Link Level Ethernet Interface Drivers
- */
- #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/vmmac.h"
- #include "sys/ioctl.h"
- #include "sys/errno.h"
- #include "sys/vmparam.h"
- #include "sys/syslog.h"
- #include "sys/uio.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[];
- #endif
-
- #include "../include/cpu.h"
- #include "../include/pte.h"
- #include "../include/mtpr.h"
-
- #include "../vba/vbavar.h"
- #include "if_exreg.h"
- #include "if_vba.h"
-
-
- #define NH2X 32 /* Host to eXcelan request buffers */
-
- #define NX2H 16 /* eXcelan to Host reply buffers */
- #define NREC 16 /* Number of RECeive buffers */
- #define NTRB 4 /* Number of TRansmit Buffers */
- #define NVBI (NREC + NTRB)
-
- #define EXWATCHINTVL 10 /* call exwatch every x secs */
-
- int exprobe(), exslave(), exattach(), exintr(), exstart();
- struct vba_device *exinfo[NEX];
-
- long exstd[] = { 0 };
-
-
- struct vba_driver exdriver =
- { exprobe, 0, exattach, exstart, exstd, "ex", exinfo };
- int exinit(),ether_output(),exioctl(),exreset(),exwatch();
- struct ex_msg *exgetcbuf();
- int ex_ncall = 0; /* counts calls to exprobe */
- u_long busoff;
-
- /*
- * Ethernet software status per interface.
- *
- * Each interface is referenced by a network interface structure, xs_if, which
- * the routing code uses to locate the interface. This structure contains the
- * output queue for the interface, its address, ... NOTE: To configure multiple
- * controllers, the sizeof this structure must be a multiple of 16 (xs_h2xhdr).
- */
- struct ex_softc {
- struct arpcom xs_ac; /* Ethernet common part */
- #define xs_if xs_ac.ac_if /* network-visible interface */
- #define xs_addr xs_ac.ac_enaddr /* hardware Ethernet address */
- int xs_flags; /* private flags */
- #define EX_XPENDING 1 /* xmit rqst pending on EXOS */
- #define EX_STATPENDING (1<<1) /* stats rqst pending on EXOS */
- #define EX_RUNNING (1<<2) /* board is running */
- #define EX_SETADDR (1<<3) /* physaddr has been changed */
- int xs_cvec; /* probe stores cvec here */
- short xs_enetunit; /* unit number for enet filtering */
- short xs_enetinit; /* enet inetrface is initialized */
- struct ex_msg *xs_h2xnext; /* host pointer to request queue */
- struct ex_msg *xs_x2hnext; /* host pointer to reply queue */
- u_long xs_qbaddr; /* map info for structs below */
- struct ex_shm {
- /* the following structures are always mapped in */
- u_short sm_h2xhdr; /* EXOS's request queue header */
- u_short sm_x2hhdr; /* EXOS's reply queue header */
- struct ex_msg sm_h2xent[NH2X];/* request msg buffers */
- struct ex_msg sm_x2hent[NX2H];/* reply msg buffers */
- struct ex_conf sm_cm; /* configuration message */
- struct ex_stat sm_xsa; /* EXOS writes stats here */
- /* end mapped area */
- } *xs_shm; /* host pointer to shared area */
- #define xs_h2xhdr xs_shm->sm_h2xhdr
- #define xs_x2hhdr xs_shm->sm_x2hhdr
- #define xs_h2xent xs_shm->sm_h2xent
- #define xs_x2hent xs_shm->sm_x2hent
- #define xs_cm xs_shm->sm_cm
- #define xs_xsa xs_shm->sm_xsa
- #define BUSADDR(x) (0x3D000000 | (((u_long)kvtophys(x))&0xFFFFFF))
- #define P_BUSADDR(x) (0x3D000000 | (((u_long)kvtophys(x))&0xFFFFF0))
- #define INCORE_BASE(p) (((u_long)(p)->xs_shm) & 0xFFFFFFF0)
- /* we will arrange that the shared memory begins on a 16 byte boundary */
- #define RVAL_OFF(n) (((char *)&(((struct ex_shm *)0)->n))-(char *)0)
- #define LVAL_OFF(n) (((char *)(((struct ex_shm *)0)->n))-(char *)0)
- #define H2XHDR_OFFSET RVAL_OFF(sm_h2xhdr)
- #define X2HHDR_OFFSET RVAL_OFF(sm_x2hhdr)
- #define H2XENT_OFFSET LVAL_OFF(sm_h2xent)
- #define X2HENT_OFFSET LVAL_OFF(sm_x2hent)
- #define CM_OFFSET RVAL_OFF(sm_cm)
- #define SA_OFFSET RVAL_OFF(sm_xsa)
- struct ifvba xs_vbinfo[NVBI];/* Bus Resources (low core) */
- struct ifvba *xs_pkblist; /* free list of above */
- #define GetPkBuf(b, v) ((v = (b)->mb_pkb = xs->xs_pkblist),\
- (xs->xs_pkblist = (struct ifvba *)(v)->iff_mbuf))
- #define FreePkBuf(v) (((v)->iff_mbuf = (struct mbuf *)xs->xs_pkblist),\
- (xs->xs_pkblist = v))
- char xs_nrec; /* number of pending receive buffers */
- char xs_ntrb; /* number of pending transmit buffers */
- } ex_softc[NEX];
-
- int ex_padcheck = sizeof (struct ex_softc);
-
- exprobe(reg, vi)
- caddr_t reg;
- struct vba_device *vi;
- {
- register br, cvec; /* r12, r11 value-result */
- register struct exdevice *exaddr = (struct exdevice *)reg;
- int i;
-
- if (badaddr((caddr_t)exaddr, 2))
- return 0;
- /*
- * Reset EXOS and run self-test (should complete within 2 seconds).
- */
- movow(&exaddr->ex_porta, EX_RESET);
- for (i = 1000000; i; i--) {
- uncache(&(exaddr->ex_portb));
- if (exaddr->ex_portb & EX_TESTOK)
- break;
- }
- if ((exaddr->ex_portb & EX_TESTOK) == 0)
- return 0;
- br = 0x15;
- cvec = --vi->ui_hd->vh_lastiv;
- ex_softc[vi->ui_unit].xs_cvec = cvec;
- ex_ncall++;
- return (sizeof(struct exdevice));
- }
-
- /*
- * Interface exists: make available by filling in network interface record.
- * System will initialize the interface when it is ready to accept packets.
- * A NET_ADDRS command is done to get the ethernet address.
- */
- exattach(ui)
- register struct vba_device *ui;
- {
- register struct ex_softc *xs = &ex_softc[ui->ui_unit];
- register struct ifnet *ifp = &xs->xs_if;
- register struct exdevice *exaddr = (struct exdevice *)ui->ui_addr;
- register struct ex_msg *bp;
-
- ifp->if_unit = ui->ui_unit;
- ifp->if_name = "ex";
- ifp->if_mtu = ETHERMTU;
- ifp->if_init = exinit;
- ifp->if_ioctl = exioctl;
- ifp->if_output = ether_output;
- ifp->if_reset = exreset;
- ifp->if_start = exstart;
- ifp->if_flags = IFF_BROADCAST;
-
- /*
- * Note: extra memory gets returned by if_vbareserve()
- * first, so, being page alligned, it is also 16-byte alligned.
- */
- if (if_vbareserve(xs->xs_vbinfo, NVBI, EXMAXRBUF,
- (caddr_t *)&xs->xs_shm, sizeof(*xs->xs_shm)) == 0)
- return;
- /*
- * Temporarily map queues in order to configure EXOS
- */
- xs->xs_qbaddr = INCORE_BASE(xs);
- exconfig(ui, 0); /* without interrupts */
- if (xs->xs_cm.cm_cc)
- return; /* bad conf */
- /*
- * Get Ethernet address.
- */
- if ((bp = exgetcbuf(xs, LLNET_ADDRS)) == (struct ex_msg *)0)
- panic("exattach");
- bp->mb_na.na_mask = READ_OBJ;
- bp->mb_na.na_slot = PHYSSLOT;
- bp->mb_status |= MH_EXOS;
- movow(&exaddr->ex_portb, EX_NTRUPT);
- bp = xs->xs_x2hnext;
- while ((bp->mb_status & MH_OWNER) == MH_EXOS);/* poll for reply */
- printf("ex%d: HW %c.%c NX %c.%c, hardware address %s\n",
- ui->ui_unit, xs->xs_cm.cm_vc[2], xs->xs_cm.cm_vc[3],
- xs->xs_cm.cm_vc[0], xs->xs_cm.cm_vc[1],
- ether_sprintf(bp->mb_na.na_addrs));
- bcopy((caddr_t)bp->mb_na.na_addrs, (caddr_t)xs->xs_addr,
- sizeof(xs->xs_addr));
- if_attach(ifp);
- }
-
- /*
- * Reset of interface after BUS reset.
- * If interface is on specified vba, reset its state.
- */
- exreset(unit)
- int unit;
- {
- register struct vba_device *ui;
-
- if (unit >= NEX || (ui = exinfo[unit]) == 0 || ui->ui_alive == 0)
- return;
- printf(" ex%d", unit);
- ex_softc[unit].xs_if.if_flags &= ~IFF_RUNNING;
- ex_softc[unit].xs_flags &= ~EX_RUNNING;
-
- exinit(unit);
- }
-
- /*
- * Initialization of interface; clear recorded pending operations, and
- * reinitialize BUS usage. Called at boot time, and at ifconfig time via
- * exioctl, with interrupts disabled.
- */
- exinit(unit)
- int unit;
- {
- register struct ex_softc *xs = &ex_softc[unit];
- register struct vba_device *ui = exinfo[unit];
- register struct exdevice *exaddr = (struct exdevice *)ui->ui_addr;
- register struct ifnet *ifp = &xs->xs_if;
- register struct sockaddr_in *sin;
- register struct ex_msg *bp;
- int s;
-
- /* not yet, if address still unknown */
- if (ifp->if_addrlist == (struct ifaddr *)0)
- return;
- if (xs->xs_flags & EX_RUNNING)
- return;
-
- xs->xs_qbaddr = INCORE_BASE(xs);
- exconfig(ui, 4); /* with vectored interrupts*/
-
- /*
- * Put EXOS on the Ethernet, using NET_MODE command
- */
- if ((bp = exgetcbuf(xs, LLNET_MODE)) == (struct ex_msg *)0)
- panic("exinit");
- bp->mb_nm.nm_mask = WRITE_OBJ;
- bp->mb_nm.nm_optn = 0;
- bp->mb_nm.nm_mode = MODE_PERF;
- bp->mb_status |= MH_EXOS;
- movow(&exaddr->ex_portb, EX_NTRUPT);
- bp = xs->xs_x2hnext;
- while ((bp->mb_status & MH_OWNER) == MH_EXOS) /* poll for reply */
- ;
- bp->mb_length = MBDATALEN;
- bp->mb_status |= MH_EXOS; /* free up buffer */
- movow(&exaddr->ex_portb, EX_NTRUPT);
- xs->xs_x2hnext = xs->xs_x2hnext->mb_next;
-
- ifp->if_watchdog = exwatch;
- ifp->if_timer = EXWATCHINTVL;
- s = splimp(); /* are interrupts disabled here, anyway? */
- exhangrcv(unit);
- xs->xs_if.if_flags |= IFF_RUNNING;
- xs->xs_flags |= EX_RUNNING;
- if (xs->xs_flags & EX_SETADDR)
- ex_setaddr((u_char *)0, unit);
- #ifdef ISO
- ex_setmulti(all_es_snpa, unit, 1);
- ex_setmulti(all_is_snpa, unit, 2);
- #endif
- exstart(&ex_softc[unit].xs_if); /* start transmits */
- splx(s); /* are interrupts disabled here, anyway? */
- }
-
- /*
- * Reset, test, and configure EXOS. It is called by exinit, and exattach.
- * Returns 0 if successful, 1 if self-test failed.
- */
- exconfig(ui, itype)
- struct vba_device *ui;
- int itype;
- {
- register int unit = ui->ui_unit;
- register struct ex_softc *xs = &ex_softc[unit];
- register struct exdevice *exaddr = (struct exdevice *) ui->ui_addr;
- register struct ex_conf *cm = &xs->xs_cm;
- register struct ex_msg *bp;
- register struct ifvba *pkb;
- int i;
- u_long shiftreg;
- static u_char cmaddr[8] = {0xFF, 0xFF, 0, 0};
-
- xs->xs_flags = 0;
- /*
- * Reset EXOS, wait for self-test to complete
- */
- movow(&exaddr->ex_porta, EX_RESET);
- do {
- uncache(&exaddr->ex_portb);
- } while ((exaddr->ex_portb & EX_TESTOK) == 0) ;
- /*
- * Set up configuration message.
- */
- cm->cm_1rsrv = 1;
- cm->cm_cc = 0xFF;
- cm->cm_opmode = 0; /* link-level controller mode */
- cm->cm_dfo = 0x0101; /* enable host data order conversion */
- cm->cm_dcn1 = 1;
- cm->cm_2rsrv[0] = cm->cm_2rsrv[1] = 0;
- cm->cm_ham = 3; /* absolute address mode */
- cm->cm_3rsrv = 0;
- cm->cm_mapsiz = 0;
- cm->cm_byteptrn[0] = 0x01; /* EXOS deduces data order of host */
- cm->cm_byteptrn[1] = 0x03; /* by looking at this pattern */
- cm->cm_byteptrn[2] = 0x07;
- cm->cm_byteptrn[3] = 0x0F;
- cm->cm_wordptrn[0] = 0x0103;
- cm->cm_wordptrn[1] = 0x070F;
- cm->cm_lwordptrn = 0x0103070F;
- for (i=0; i<20; i++) cm->cm_rsrvd[i] = 0;
- cm->cm_mba = 0xFFFFFFFF;
- cm->cm_nproc = 0xFF;
- cm->cm_nmbox = 0xFF;
- cm->cm_nmcast = 0xFF;
- cm->cm_nhost = 1;
- cm->cm_h2xba = P_BUSADDR(xs->xs_qbaddr);
- cm->cm_h2xhdr = H2XHDR_OFFSET;
- cm->cm_h2xtyp = 0; /* should never wait for rqst buffer */
- cm->cm_x2hba = cm->cm_h2xba;
- cm->cm_x2hhdr = X2HHDR_OFFSET;
- cm->cm_x2htyp = itype; /* 0 for none, 4 for vectored */
- cm->cm_x2haddr = xs->xs_cvec; /* ivec allocated in exprobe */
- /*
- * Set up message queues and headers.
- * First the request queue
- */
- for (bp = &xs->xs_h2xent[0]; bp < &xs->xs_h2xent[NH2X]; bp++) {
- bp->mb_link = (u_short)((char *)(bp+1)-INCORE_BASE(xs));
- bp->mb_rsrv = 0;
- bp->mb_length = MBDATALEN;
- bp->mb_status = MH_HOST;
- bp->mb_next = bp+1;
- }
- xs->xs_h2xhdr = xs->xs_h2xent[NH2X-1].mb_link = (u_short)H2XENT_OFFSET;
- xs->xs_h2xnext = xs->xs_h2xent[NH2X-1].mb_next = xs->xs_h2xent;
-
- /* Now the reply queue. */
- for (bp = &xs->xs_x2hent[0]; bp < &xs->xs_x2hent[NX2H]; bp++) {
- bp->mb_link = (u_short)((char *)(bp+1)-INCORE_BASE(xs));
- bp->mb_rsrv = 0;
- bp->mb_length = MBDATALEN;
- bp->mb_status = MH_EXOS;
- bp->mb_next = bp+1;
- }
- xs->xs_x2hhdr = xs->xs_x2hent[NX2H-1].mb_link = (u_short)X2HENT_OFFSET;
- xs->xs_x2hnext = xs->xs_x2hent[NX2H-1].mb_next = xs->xs_x2hent;
- xs->xs_nrec = 0;
- xs->xs_ntrb = 0;
- xs->xs_pkblist = xs->xs_vbinfo + NVBI - 1;
- for (pkb = xs->xs_pkblist; pkb > xs->xs_vbinfo; pkb--)
- pkb->iff_mbuf = (struct mbuf *)(pkb - 1);
- xs->xs_vbinfo[0].iff_mbuf = 0;
-
- /*
- * Write config msg address to EXOS and wait for configuration to
- * complete (guaranteed response within 2 seconds).
- */
- shiftreg = P_BUSADDR(xs->xs_qbaddr) + CM_OFFSET;
- for (i = 4; i < 8; i++) {
- cmaddr[i] = (u_char)(shiftreg & 0xFF);
- shiftreg >>= 8;
- }
- for (i = 0; i < 8; i++) {
- do {
- uncache(&exaddr->ex_portb);
- } while (exaddr->ex_portb & EX_UNREADY) ;
- DELAY(500);
- movow(&exaddr->ex_portb, cmaddr[i]);
- }
- for (i = 500000; i; --i) {
- DELAY(10);
- uncache(&cm->cm_cc);
- if (cm->cm_cc != 0xFF)
- break;
- }
- if (cm->cm_cc)
- printf("ex%d: configuration failed; cc=%x\n", unit, cm->cm_cc);
- }
-
- /*
- * Start or re-start output on interface. Get another datagram to send off of
- * the interface queue, and map it to the interface before starting the output.
- * This routine is called by exinit(), exoutput(), and excdint(). In all cases,
- * interrupts by EXOS are disabled.
- */
- exstart(ifp)
- struct ifnet *ifp;
- {
- int unit = ifp->if_unit;
- struct vba_device *ui = exinfo[unit];
- register struct ex_softc *xs = &ex_softc[unit];
- struct exdevice *exaddr = (struct exdevice *)ui->ui_addr;
- register struct ex_msg *bp;
- register struct mbuf *m;
- int len;
- register struct ifvba *pkb;
- struct mbuf *m0 = 0;
- register int nb = 0, tlen = 0;
- union l_util {
- u_long l;
- struct i86_long i;
- } l_util;
-
- if (xs->xs_ntrb >= NTRB)
- return;
- if (xs->xs_pkblist == 0) {
- printf("ex%d: vbinfo exhausted, would panic", unit);
- return;
- }
- IF_DEQUEUE(&xs->xs_if.if_snd, m);
- if (m == 0)
- return;
- /*
- * Get a transmit request.
- */
- if ((bp = exgetcbuf(xs, LLRTRANSMIT)) == (struct ex_msg *)0) {
- m_freem(m);
- printf("exstart: no command buffers\n");
- return;
- }
- xs->xs_ntrb++;
- GetPkBuf(bp, pkb);
- pkb->iff_mbuf = m; /* save mbuf pointer to free when done */
- /*
- * point directly to the first group of mbufs to be transmitted. The
- * hardware can only support NFRAGMENTS descriptors.
- */
- while (m && ((nb < NFRAGMENTS-1) || (m->m_next == 0)) ) {
- l_util.l = BUSADDR(mtod(m, caddr_t));
- bp->mb_et.et_blks[nb].bb_len = (u_short)m->m_len;
- bp->mb_et.et_blks[nb].bb_addr = l_util.i;
- if (l_util.l + m->m_len > BUSADDR(VB_MAXADDR24)) {
- /* Here, the phys memory for the mbuf is out
- of range for the vmebus to talk to it */
- if (m == pkb->iff_mbuf)
- pkb->iff_mbuf = 0;
- break;
- }
- tlen += m->m_len;
- m0 = m;
- m = m->m_next;
- nb++;
- }
-
- /* 0 end of chain pointed to by iff_mbuf, to be freed when xmit done */
- if (m0)
- m0->m_next = 0;
-
- /*
- * if not all of the descriptors would fit then merge remaining data
- * into the transmit buffer, and point to it. Note: the mbufs are freed
- * during the merge, they do not have to be freed when we get the
- * transmit interrupt.
- */
- if (m) {
- if (m == pkb->iff_mbuf) {
- printf("ex%d: exstart insanity\n", unit);
- pkb->iff_mbuf = 0;
- }
- len = if_vbaput(pkb->iff_buffer, m, 0);
- l_util.l = BUSADDR(pkb->iff_buffer);
- bp->mb_et.et_blks[nb].bb_len = (u_short)len;
- bp->mb_et.et_blks[nb].bb_addr = l_util.i;
- tlen += len;
- nb++;
- }
-
- /*
- * If the total length of the packet is too small,
- * pad the last fragment. (May run into very obscure problems)
- */
- if (tlen < sizeof(struct ether_header) + ETHERMIN) {
- len = (ETHERMIN + sizeof(struct ether_header)) - tlen;
- bp->mb_et.et_blks[nb-1].bb_len += (u_short)len;
- tlen += len;
- #ifdef notdef
- if (l_util.l + m->m_len > BUSADDR(VB_MAXADDR24)) {
- must copy last frag into private buffer
- }
- #endif
- }
-
- /* set number of fragments in descriptor */
- bp->mb_et.et_nblock = nb;
- bp->mb_status |= MH_EXOS;
- movow(&exaddr->ex_portb, EX_NTRUPT);
- }
-
- /*
- * interrupt service routine.
- */
- exintr(unit)
- int unit;
- {
- register struct ex_softc *xs = &ex_softc[unit];
- register struct ex_msg *bp = xs->xs_x2hnext;
- struct vba_device *ui = exinfo[unit];
- struct exdevice *exaddr = (struct exdevice *)ui->ui_addr;
- struct ex_msg *next_bp;
-
- while ((bp->mb_status & MH_OWNER) == MH_HOST) {
- switch (bp->mb_rqst) {
- case LLRECEIVE:
- if (--xs->xs_nrec < 0) {
- printf("ex%d: internal receive check\n", unit);
- xs->xs_nrec = 0;
- }
- exrecv(unit, bp);
- FreePkBuf(bp->mb_pkb);
- bp->mb_pkb = (struct ifvba *)0;
- exhangrcv(unit);
- break;
-
- case LLTRANSMIT:
- case LLRTRANSMIT:
- if (--xs->xs_ntrb < 0) {
- printf("ex%d: internal transmit check\n", unit);
- xs->xs_ntrb = 0;
- }
- xs->xs_if.if_opackets++;
- if (bp->mb_rply == LL_OK || bp->mb_rply == LLXM_NSQE)
- ;
- else if (bp->mb_rply & LLXM_1RTRY)
- xs->xs_if.if_collisions++;
- else if (bp->mb_rply & LLXM_RTRYS)
- xs->xs_if.if_collisions += 2; /* guess */
- else if (bp->mb_rply & LLXM_ERROR)
- if (xs->xs_if.if_oerrors++ % 100 == 0)
- printf("ex%d: 100 transmit errors=%b\n",
- unit, bp->mb_rply, XMIT_BITS);
- if (bp->mb_pkb->iff_mbuf) {
- m_freem(bp->mb_pkb->iff_mbuf);
- bp->mb_pkb->iff_mbuf = (struct mbuf *)0;
- }
- FreePkBuf(bp->mb_pkb);
- bp->mb_pkb = (struct ifvba *)0;
- exstart(&xs->xs_if);
- exhangrcv(unit);
- break;
-
- case LLNET_STSTCS:
- xs->xs_if.if_ierrors += xs->xs_xsa.sa_crc;
- xs->xs_flags &= ~EX_STATPENDING;
- case LLNET_ADDRS:
- case LLNET_RECV:
- if (bp->mb_rply == LL_OK || bp->mb_rply == LLXM_NSQE)
- ;
- else
- printf("ex%d: %s, request 0x%x, reply 0x%x\n",
- unit, "unsucessful stat or address change",
- bp->mb_rqst, bp->mb_rply);
- break;
-
- default:
- printf("ex%d: unknown reply 0x%x", unit, bp->mb_rqst);
- }
- bp->mb_length = MBDATALEN;
- next_bp = bp->mb_next;
- bp->mb_status |= MH_EXOS; /* free up buffer */
- bp = next_bp; /* paranoia about race */
- movow(&exaddr->ex_portb, EX_NTRUPT); /* tell EXOS about it */
- }
- xs->xs_x2hnext = bp;
- }
-
- /*
- * Get a request buffer, fill in standard values, advance pointer.
- */
- struct ex_msg *
- exgetcbuf(xs, req)
- struct ex_softc *xs;
- int req;
- {
- register struct ex_msg *bp;
- struct ifvba *pkb;
- int s = splimp();
-
- bp = xs->xs_h2xnext;
- if ((bp->mb_status & MH_OWNER) == MH_EXOS) {
- splx(s);
- return (struct ex_msg *)0;
- }
- xs->xs_h2xnext = bp->mb_next;
- bp->mb_1rsrv = 0;
- bp->mb_rqst = req;
- bp->mb_length = MBDATALEN;
- bp->mb_pkb = (struct ifvba *)0;
- splx(s);
- return bp;
- }
-
- /*
- * Process Ethernet receive completion: If input error just drop packet,
- * otherwise examine packet to determine type. If can't determine length from
- * type, then have to drop packet, otherwise decapsulate packet based on type
- * and pass to type-specific higher-level input routine.
- */
- exrecv(unit, bp)
- int unit;
- register struct ex_msg *bp;
- {
- register struct ex_softc *xs = &ex_softc[unit];
- register struct ether_header *eh;
- register struct mbuf *m;
- int len, off, resid;
- register struct ifqueue *inq;
- int s;
-
- xs->xs_if.if_ipackets++;
- /* total length - header - crc */
- len = bp->mb_er.er_blks[0].bb_len - sizeof(struct ether_header) - 4;
- if (bp->mb_rply != LL_OK) {
- if (xs->xs_if.if_ierrors++ % 100 == 0)
- printf("ex%d: 100 receive errors=%b\n",
- unit, bp->mb_rply, RECV_BITS);
- return;
- }
- eh = (struct ether_header *)(bp->mb_pkb->iff_buffer);
-
- /*
- * Deal with trailer protocol: if type is PUP trailer get true type from
- * first 16-bit word past data. Remember that type was trailer by
- * setting off.
- */
- eh->ether_type = ntohs((u_short)eh->ether_type);
- #define exdataaddr(eh, off, type) ((type)(((caddr_t)((eh)+1)+(off))))
- if (eh->ether_type >= ETHERTYPE_TRAIL &&
- eh->ether_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
- off = (eh->ether_type - ETHERTYPE_TRAIL) * 512;
- if (off >= ETHERMTU)
- return; /* sanity */
- eh->ether_type = ntohs(*exdataaddr(eh, off, u_short *));
- resid = ntohs(*(exdataaddr(eh, off+2, u_short *)));
- if (off + resid > len)
- return; /* sanity */
- len = off + resid;
- } else
- off = 0;
- if (len == 0)
- return;
- /*
- * Pull packet off interface. Off is nonzero if packet
- * has trailing header; if_vbaget 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_vbaget(bp->mb_pkb->iff_buffer, len, off, &xs->xs_if, 0);
- if (m == 0)
- return;
- ether_input(&xs->xs_if, eh, m);
- return;
- }
-
- /*
- * Hang a receive request. This routine is called by exinit and excdint,
- * with interrupts disabled in both cases.
- */
- exhangrcv(unit)
- int unit;
- {
- register struct ex_softc *xs = &ex_softc[unit];
- register struct ex_msg *bp;
- register struct ifvba *pkb;
- short mustint = 0;
- union l_util {
- u_long l;
- struct i86_long i;
- } l_util;
-
- while (xs->xs_nrec < NREC) {
- if (xs->xs_pkblist == (struct ifvba *)0)
- break;
- if ((bp = exgetcbuf(xs, LLRECEIVE)) == (struct ex_msg *)0) {
- break;
- }
- GetPkBuf(bp, pkb);
- pkb->iff_mbuf = 0;
- xs->xs_nrec += 1;
- bp->mb_er.er_nblock = 1;
- bp->mb_er.er_blks[0].bb_len = EXMAXRBUF;
- l_util.l = BUSADDR(pkb->iff_buffer);
- bp->mb_er.er_blks[0].bb_addr = l_util.i;
- bp->mb_status |= MH_EXOS;
- mustint = 1;
- }
- if (mustint == 0)
- return;
- movow(&((struct exdevice *)exinfo[unit]->ui_addr)->ex_portb, EX_NTRUPT);
- }
-
- /*
- * Ethernet output routine is ether_output().
- */
-
- /*
- * Watchdog routine (currently not used). Might use this to get stats from EXOS.
- */
- exwatch(unit)
- int unit;
- {
- struct exdevice *exaddr = (struct exdevice *)exinfo[unit]->ui_addr;
- register struct ex_softc *xs = &ex_softc[unit];
- register struct ex_msg *bp;
- int s = splimp();
-
- if (xs->xs_flags & EX_STATPENDING)
- goto exspnd;
- if ((bp = exgetcbuf(xs, LLNET_STSTCS)) == (struct ex_msg *)0) {
- splx(s);
- return;
- }
- xs->xs_flags |= EX_STATPENDING;
- bp->mb_ns.ns_mask = READ_OBJ;
- bp->mb_ns.ns_rsrv = 0;
- bp->mb_ns.ns_nobj = 8;
- bp->mb_ns.ns_xobj = 0;
- bp->mb_ns.ns_bufp = P_BUSADDR(xs->xs_qbaddr) + SA_OFFSET;
- bp->mb_status |= MH_EXOS;
- movow(&exaddr->ex_portb, EX_NTRUPT);
- exspnd: splx(s);
- xs->xs_if.if_timer = EXWATCHINTVL;
- }
-
- /*
- * Process an ioctl request.
- */
- exioctl(ifp, cmd, data)
- register struct ifnet *ifp;
- int cmd;
- caddr_t data;
- {
- register struct ifaddr *ifa = (struct ifaddr *)data;
- register struct ex_softc *xs = &ex_softc[ifp->if_unit];
- int s = splimp(), error = 0;
-
- switch (cmd) {
-
- case SIOCSIFADDR:
- ifp->if_flags |= IFF_UP;
- exinit(ifp->if_unit);
-
- switch (ifa->ifa_addr->sa_family) {
- #ifdef INET
- case AF_INET:
- ((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 *)(xs->xs_addr);
- else
- ex_setaddr(ina->x_host.c_host,ifp->if_unit);
- break;
- }
- #endif
- }
- break;
-
- case SIOCSIFFLAGS:
- if ((ifp->if_flags & IFF_UP) == 0 &&
- xs->xs_flags & EX_RUNNING) {
- movow(&((struct exdevice *)
- (exinfo[ifp->if_unit]->ui_addr))->ex_porta, EX_RESET);
- xs->xs_flags &= ~EX_RUNNING;
- } else if (ifp->if_flags & IFF_UP &&
- (xs->xs_flags & EX_RUNNING) == 0)
- exinit(ifp->if_unit);
- break;
-
- default:
- error = EINVAL;
- }
- splx(s);
- return (error);
- }
-
- /*
- * set ethernet address for unit
- */
- ex_setaddr(physaddr, unit)
- u_char *physaddr;
- int unit;
- {
- register struct ex_softc *xs = &ex_softc[unit];
-
- if (physaddr) {
- xs->xs_flags |= EX_SETADDR;
- bcopy((caddr_t)physaddr, (caddr_t)xs->xs_addr, 6);
- }
- ex_setmulti((u_char *)xs->xs_addr, unit, PHYSSLOT);
- }
-
- /*
- * Enable multicast reception for unit.
- */
- ex_setmulti(linkaddr, unit, slot)
- u_char *linkaddr;
- int unit, slot;
- {
- register struct ex_softc *xs = &ex_softc[unit];
- struct vba_device *ui = exinfo[unit];
- register struct exdevice *addr= (struct exdevice *)ui->ui_addr;
- register struct ex_msg *bp;
-
- if (!(xs->xs_flags & EX_RUNNING))
- return;
- bp = exgetcbuf(xs, LLNET_ADDRS);
- bp->mb_na.na_mask = READ_OBJ|WRITE_OBJ;
- bp->mb_na.na_slot = slot;
- bcopy((caddr_t)linkaddr, (caddr_t)bp->mb_na.na_addrs, 6);
- bp->mb_status |= MH_EXOS;
- movow(&addr->ex_portb, EX_NTRUPT);
- bp = xs->xs_x2hnext;
- while ((bp->mb_status & MH_OWNER) == MH_EXOS);/* poll for reply */
- #ifdef DEBUG
- log(LOG_DEBUG, "ex%d: %s %s (slot %d)\n", unit,
- (slot == PHYSSLOT ? "reset addr" : "add multicast"
- ether_sprintf(bp->mb_na.na_addrs), slot);
- #endif
- /*
- * Now, re-enable reception on slot.
- */
- bp = exgetcbuf(xs, LLNET_RECV);
- bp->mb_nr.nr_mask = ENABLE_RCV|READ_OBJ|WRITE_OBJ;
- bp->mb_nr.nr_slot = slot;
- bp->mb_status |= MH_EXOS;
- movow(&addr->ex_portb, EX_NTRUPT);
- bp = xs->xs_x2hnext;
- while ((bp->mb_status & MH_OWNER) == MH_EXOS);/* poll for reply */
- ;
- }
- #endif
-