if_de.c revision 4796
1/*-
2 * Copyright (c) 1994 Matt Thomas (thomas@lkg.dec.com)
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. The name of the author may not be used to endorse or promote products
11 *    derived from this software withough specific prior written permission
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 *
24 * $Id: if_de.c,v 1.7 1994/11/22 09:47:31 davidg Exp $
25 *
26 */
27
28/*
29 * DEC DC21040 PCI Ethernet Controller
30 *
31 * Written by Matt Thomas
32 * BPF support code stolen directly from if_ec.c
33 *
34 *   This driver supports the DEC DE435 or any other PCI
35 *   board which support DC21040.
36 */
37
38#include "de.h"
39#if NDE > 0
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/mbuf.h>
44#include <sys/protosw.h>
45#include <sys/socket.h>
46#include <sys/ioctl.h>
47#include <sys/errno.h>
48#include <sys/malloc.h>
49
50#include <net/if.h>
51#include <net/if_types.h>
52#include <net/if_dl.h>
53#include <net/route.h>
54
55#include "bpfilter.h"
56#if NBPFILTER > 0
57#include <net/bpf.h>
58#include <net/bpfdesc.h>
59#endif
60
61#ifdef INET
62#include <netinet/in.h>
63#include <netinet/in_systm.h>
64#include <netinet/in_var.h>
65#include <netinet/ip.h>
66#include <netinet/if_ether.h>
67#endif
68
69#ifdef NS
70#include <netns/ns.h>
71#include <netns/ns_if.h>
72#endif
73
74#include <vm/vm.h>
75#include <vm/vm_kern.h>
76#include <vm/vm_param.h>
77
78
79#include <pci.h>
80#if NPCI > 0
81#include <i386/pci/pcireg.h>
82#endif
83#include <i386/isa/icu.h>
84#include <i386/pci/dc21040.h>
85
86/*
87 * This module supports the DEC DC21040 PCI Ethernet Controller.
88 */
89
90typedef struct {
91    unsigned long addr;
92    unsigned long length;
93} tulip_addrvec_t;
94
95typedef struct {
96    tulip_desc_t *ri_first;
97    tulip_desc_t *ri_last;
98    tulip_desc_t *ri_nextin;
99    tulip_desc_t *ri_nextout;
100    int ri_max;
101    int ri_free;
102} tulip_ringinfo_t;
103
104typedef struct {
105    volatile tulip_uint32_t *csr_busmode;		/* CSR0 */
106    volatile tulip_uint32_t *csr_txpoll;		/* CSR1 */
107    volatile tulip_uint32_t *csr_rxpoll;		/* CSR2 */
108    volatile tulip_uint32_t *csr_rxlist;		/* CSR3 */
109    volatile tulip_uint32_t *csr_txlist;		/* CSR4 */
110    volatile tulip_uint32_t *csr_status;		/* CSR5 */
111    volatile tulip_uint32_t *csr_command;		/* CSR6 */
112    volatile tulip_uint32_t *csr_intr;			/* CSR7 */
113    volatile tulip_uint32_t *csr_missed_frame;		/* CSR8 */
114    volatile tulip_sint32_t *csr_enetrom;		/* CSR9 */
115    volatile tulip_uint32_t *csr_reserved;		/* CSR10 */
116    volatile tulip_uint32_t *csr_full_duplex;		/* CSR11 */
117    volatile tulip_uint32_t *csr_sia_status;		/* CSR12 */
118    volatile tulip_uint32_t *csr_sia_connectivity;	/* CSR13 */
119    volatile tulip_uint32_t *csr_sia_tx_rx;		/* CSR14 */
120    volatile tulip_uint32_t *csr_sia_general;		/* CSR15 */
121} tulip_regfile_t;
122
123/*
124 * The DC21040 has a stupid restriction in that the receive
125 * buffers must be longword aligned.  But since Ethernet
126 * headers are not a multiple of longwords in size this forces
127 * the data to non-longword aligned.  Since IP requires the
128 * data to be longword aligned, we need to copy it after it has
129 * been DMA'ed in our memory.
130 *
131 * Since we have to copy it anyways, we might as well as allocate
132 * dedicated receive space for the input.  This allows to use a
133 * small receive buffer size and more ring entries to be able to
134 * better keep with a flood of tiny Ethernet packets.
135 *
136 * The receive space MUST ALWAYS be a multiple of the page size.
137 * And the number of receive descriptors multiplied by the size
138 * of the receive buffers must equal the recevive space.  This
139 * is so that we can manipulate the page tables so that even if a
140 * packet wraps around the end of the receive space, we can
141 * treat it as virtually contiguous.
142 */
143#define	TULIP_RXBUFSIZE		512
144#define	TULIP_RXDESCS		128
145#define	TULIP_RXSPACE		(TULIP_RXBUFSIZE * TULIP_RXDESCS)
146#define	TULIP_TXDESCS		128
147
148typedef struct {
149    struct arpcom tulip_ac;
150    tulip_regfile_t tulip_csrs;
151    vm_offset_t tulip_rxspace;
152    unsigned tulip_flags;
153#define	TULIP_WANTSETUP		0x01
154#define	TULIP_WANTHASH		0x02
155#define	TULIP_DOINGSETUP	0x04
156#define	TULIP_ALTPHYS		0x08	/* use AUI */
157    unsigned char tulip_rombuf[32];
158    tulip_uint32_t tulip_setupbuf[192/sizeof(tulip_uint32_t)];
159    tulip_uint32_t tulip_setupdata[192/sizeof(tulip_uint32_t)];
160    tulip_uint32_t tulip_intrmask;
161    tulip_uint32_t tulip_cmdmode;
162    tulip_uint32_t tulip_revinfo;
163#if NBPFILTER > 0
164    caddr_t tulip_bpf;			/* BPF context */
165#endif
166    struct ifqueue tulip_txq;
167    tulip_ringinfo_t tulip_rxinfo;
168    tulip_ringinfo_t tulip_txinfo;
169} tulip_softc_t;
170
171#ifndef IFF_ALTPHYS
172#define	IFF_ALTPHYS	IFF_LINK0		/* In case it isn't defined */
173#endif
174typedef enum { TULIP_DC21040, TULIP_DC21140 } tulip_chipid_t;
175const char *tulip_chipdescs[] = {
176    "DC21040 [10Mb/s]",
177    "DC21140 [100Mb/s]",
178};
179
180tulip_softc_t *tulips[NDE];
181tulip_chipid_t tulip_chipids[NDE];
182
183#define	tulip_if	tulip_ac.ac_if
184#define	tulip_unit	tulip_ac.ac_if.if_unit
185#define	tulip_name	tulip_ac.ac_if.if_name
186#define	tulip_hwaddr	tulip_ac.ac_enaddr
187
188#define	TULIP_CRC32_POLY	0xEDB88320UL	/* CRC-32 Poly -- Little Endian */
189#define	TULIP_CHECK_RXCRC	0
190#define	TULIP_MAX_TXSEG		30
191
192#define	TULIP_ADDREQUAL(a1, a2) \
193	(((u_short *)a1)[0] == ((u_short *)a2)[0] \
194	 && ((u_short *)a1)[1] == ((u_short *)a2)[1] \
195	 && ((u_short *)a1)[2] == ((u_short *)a2)[2])
196#define	TULIP_ADDRBRDCST(a1) \
197	(((u_short *)a1)[0] == 0xFFFFU \
198	 && ((u_short *)a1)[1] == 0xFFFFU \
199	 && ((u_short *)a1)[2] == 0xFFFFU)
200
201static void tulip_start(struct ifnet *ifp);
202static void tulip_addr_filter(tulip_softc_t *sc);
203
204#if __FreeBSD__ > 1
205#define	TULIP_IFRESET_ARGS	int unit
206#define	TULIP_RESET(sc)		tulip_reset((sc)->tulip_unit)
207#else
208#define	TULIP_IFRESET_ARGS	int unit, int uban
209#define	TULIP_RESET(sc)		tulip_reset((sc)->tulip_unit, 0)
210#endif
211
212static void
213tulip_reset(
214    TULIP_IFRESET_ARGS)
215{
216    tulip_softc_t *sc = tulips[unit];
217    tulip_ringinfo_t *ri;
218    tulip_desc_t *di;
219    vm_offset_t vmoff;
220
221    *sc->tulip_csrs.csr_busmode = TULIP_BUSMODE_SWRESET;
222    DELAY(10);	/* Wait 10 microsends (actually 50 PCI cycles but at
223		   33MHz that comes to two microseconds but wait a
224		   bit longer anyways) */
225
226    /*
227     * Use the
228     */
229    *sc->tulip_csrs.csr_sia_connectivity = TULIP_SIACONN_RESET;
230    if (sc->tulip_if.if_flags & IFF_ALTPHYS) {
231	if ((sc->tulip_flags & TULIP_ALTPHYS) == 0)
232	    printf("%s%d: enabling Thinwire/AUI port\n",
233		   sc->tulip_if.if_name, sc->tulip_if.if_unit);
234	*sc->tulip_csrs.csr_sia_connectivity = TULIP_SIACONN_AUI;
235	sc->tulip_flags |= TULIP_ALTPHYS;
236    } else {
237	if (sc->tulip_flags & TULIP_ALTPHYS)
238	    printf("%s%d: enabling 10baseT/UTP port\n",
239		   sc->tulip_if.if_name, sc->tulip_if.if_unit);
240	*sc->tulip_csrs.csr_sia_connectivity = TULIP_SIACONN_10BASET;
241	sc->tulip_flags &= ~TULIP_ALTPHYS;
242    }
243    *sc->tulip_csrs.csr_txlist = vtophys(&sc->tulip_txinfo.ri_first[0]);
244    *sc->tulip_csrs.csr_rxlist = vtophys(&sc->tulip_rxinfo.ri_first[0]);
245    *sc->tulip_csrs.csr_intr = 0;
246    *sc->tulip_csrs.csr_busmode = 0x4800;
247
248    sc->tulip_txq.ifq_maxlen = TULIP_TXDESCS;
249    /*
250     * Free all the mbufs that were on the transmit ring.
251     */
252    for (;;) {
253	struct mbuf *m;
254	IF_DEQUEUE(&sc->tulip_txq, m);
255	if (m == NULL)
256	    break;
257	m_freem(m);
258    }
259
260    ri = &sc->tulip_txinfo;
261    ri->ri_nextin = ri->ri_nextout = ri->ri_first;
262    ri->ri_free = ri->ri_max;
263    for (di = ri->ri_first; di < ri->ri_last; di++)
264	di->d_status = 0;
265
266    /*
267     * We need to collect all the mbufs were on the
268     * receive ring before we reinit it either to put
269     * them back on or to know if we have to allocate
270     * more.
271     */
272    ri = &sc->tulip_rxinfo;
273    ri->ri_nextin = ri->ri_nextout = ri->ri_first;
274    ri->ri_free = ri->ri_max;
275    for (vmoff = vtophys(sc->tulip_rxspace), di = ri->ri_first;
276	    di < ri->ri_last; di++, vmoff += TULIP_RXBUFSIZE) {
277	di->d_status |= TULIP_DSTS_OWNER;
278	di->d_length1 = TULIP_RXBUFSIZE; di->d_addr1 = vmoff;
279	di->d_length2 = 0; di->d_addr2 = 0;
280    }
281
282    sc->tulip_intrmask = TULIP_STS_NORMALINTR|TULIP_STS_RXINTR|TULIP_STS_TXINTR
283	|TULIP_STS_ABNRMLINTR|TULIP_STS_SYSERROR|TULIP_STS_TXSTOPPED
284	    |TULIP_STS_TXBABBLE|TULIP_STS_LINKFAIL|TULIP_STS_RXSTOPPED;
285    sc->tulip_flags &= ~(TULIP_DOINGSETUP|TULIP_WANTSETUP);
286    tulip_addr_filter(sc);
287}
288
289static void
290tulip_init(
291    int unit)
292{
293    tulip_softc_t *sc = tulips[unit];
294
295    if (sc->tulip_if.if_flags & IFF_UP) {
296	sc->tulip_if.if_flags |= IFF_RUNNING;
297	if (sc->tulip_if.if_flags & IFF_PROMISC) {
298	    sc->tulip_cmdmode |= TULIP_CMD_PROMISCUOUS;
299	} else {
300	    sc->tulip_cmdmode &= ~TULIP_CMD_PROMISCUOUS;
301	    if (sc->tulip_if.if_flags & IFF_ALLMULTI) {
302		sc->tulip_cmdmode |= TULIP_CMD_ALLMULTI;
303	    } else {
304		sc->tulip_cmdmode &= ~TULIP_CMD_ALLMULTI;
305	    }
306	}
307	sc->tulip_cmdmode |= TULIP_CMD_TXRUN;
308	if ((sc->tulip_flags & TULIP_WANTSETUP) == 0) {
309	    sc->tulip_cmdmode |= TULIP_CMD_RXRUN;
310	    sc->tulip_intrmask |= TULIP_STS_RXSTOPPED;
311	} else {
312	    sc->tulip_intrmask &= ~TULIP_STS_RXSTOPPED;
313	    tulip_start(&sc->tulip_if);
314	}
315	sc->tulip_cmdmode |= TULIP_CMD_THRSHLD160;
316	*sc->tulip_csrs.csr_intr = sc->tulip_intrmask;
317	*sc->tulip_csrs.csr_command = sc->tulip_cmdmode;
318    } else {
319	TULIP_RESET(sc);
320	sc->tulip_if.if_flags &= ~IFF_RUNNING;
321    }
322}
323
324
325#if TULIP_CHECK_RXCRC
326static unsigned
327tulip_crc32(
328    u_char *addr,
329    int len)
330{
331    unsigned int crc = 0xFFFFFFFF;
332    static unsigned int crctbl[256];
333    int idx;
334    static int done;
335    /*
336     * initialize the multicast address CRC table
337     */
338    for (idx = 0; !done && idx < 256; idx++) {
339	unsigned int tmp = idx;
340	tmp = (tmp >> 1) ^ (tmp & 1 ? TULIP_CRC32_POLY : 0);	/* XOR */
341	tmp = (tmp >> 1) ^ (tmp & 1 ? TULIP_CRC32_POLY : 0);	/* XOR */
342	tmp = (tmp >> 1) ^ (tmp & 1 ? TULIP_CRC32_POLY : 0);	/* XOR */
343	tmp = (tmp >> 1) ^ (tmp & 1 ? TULIP_CRC32_POLY : 0);	/* XOR */
344	tmp = (tmp >> 1) ^ (tmp & 1 ? TULIP_CRC32_POLY : 0);	/* XOR */
345	tmp = (tmp >> 1) ^ (tmp & 1 ? TULIP_CRC32_POLY : 0);	/* XOR */
346	tmp = (tmp >> 1) ^ (tmp & 1 ? TULIP_CRC32_POLY : 0);	/* XOR */
347	tmp = (tmp >> 1) ^ (tmp & 1 ? TULIP_CRC32_POLY : 0);	/* XOR */
348	crctbl[idx] = tmp;
349    }
350    done = 1;
351
352    while (len-- > 0)
353	crc = (crc >> 8) ^ crctbl[*addr++] ^ crctbl[crc & 0xFF];
354
355    return crc;
356}
357#endif
358
359static void
360tulip_rx_intr(
361    tulip_softc_t *sc)
362{
363    tulip_ringinfo_t *ri = &sc->tulip_rxinfo;
364    struct ifnet *ifp = &sc->tulip_if;
365
366    for (;;) {
367	tulip_desc_t *eop;
368	int total_len, ndescs;
369	caddr_t bufaddr = (caddr_t) sc->tulip_rxspace;
370
371	for (ndescs = 1, eop = ri->ri_nextin;; ndescs++) {
372	    if (((volatile tulip_desc_t *) eop)->d_status & TULIP_DSTS_OWNER)
373		return;
374
375	    if (eop->d_status & TULIP_DSTS_RxLASTDESC)
376		break;
377	    if (++eop == ri->ri_last)
378		eop = ri->ri_first;
379	}
380
381	bufaddr += TULIP_RXBUFSIZE * (ri->ri_nextin - ri->ri_first);
382	total_len = ((eop->d_status >> 16) & 0x7FF) - 4;
383
384	if ((eop->d_status & TULIP_DSTS_ERRSUM) == 0) {
385	    struct ether_header eh;
386	    struct mbuf *m;
387
388#if TULIP_CHECK_RXCRC
389	    unsigned crc = tulip_crc32(bufaddr, total_len);
390	    if (~crc != *((unsigned *) &bufaddr[total_len])) {
391		printf("de0: bad rx crc: %08x [rx] != %08x\n",
392		       *((unsigned *) &bufaddr[total_len]), ~crc);
393		goto next;
394	    }
395#endif
396	    eh = *(struct ether_header *) bufaddr;
397#if NBPFILTER > 0
398	    if (sc->tulip_bpf != NULL) {
399		bpf_tap(sc->tulip_bpf, bufaddr, total_len);
400		if (eh.ether_type != ETHERTYPE_IP && eh.ether_type != ETHERTYPE_ARP)
401		    goto next;
402		if ((eh.ether_dhost[0] & 1) == 0 &&
403		    !TULIP_ADDREQUAL(eh.ether_dhost, sc->tulip_ac.ac_enaddr))
404		    goto next;
405	    } else if (!TULIP_ADDREQUAL(eh.ether_dhost, sc->tulip_ac.ac_enaddr)
406		    && !TULIP_ADDRBRDCST(eh.ether_dhost)) {
407		    goto next;
408	    }
409#endif
410	    MGETHDR(m, M_DONTWAIT, MT_DATA);
411	    if (m != NULL) {
412		m->m_pkthdr.rcvif = ifp;
413		total_len -= sizeof(eh);
414		if (total_len > MHLEN) {
415		    MCLGET(m, M_DONTWAIT);
416		    if ((m->m_flags & M_EXT) == 0) {
417			m_freem(m);
418			ifp->if_ierrors++;
419			goto next;
420		    }
421		}
422		bcopy(bufaddr + sizeof(eh), mtod(m, caddr_t), total_len);
423		m->m_len = m->m_pkthdr.len = total_len;
424		ether_input(ifp, &eh, m);
425	    } else {
426		ifp->if_ierrors++;
427	    }
428	} else {
429	    ifp->if_ierrors++;
430	}
431next:
432	ifp->if_ipackets++;
433	while (ndescs-- > 0) {
434	    ri->ri_nextin->d_status |= TULIP_DSTS_OWNER;
435	    if (++ri->ri_nextin == ri->ri_last)
436		ri->ri_nextin = ri->ri_first;
437	}
438    }
439}
440
441static int
442tulip_tx_intr(
443    tulip_softc_t *sc)
444{
445    tulip_ringinfo_t *ri = &sc->tulip_txinfo;
446    struct mbuf *m;
447    int xmits = 0;
448
449    while (ri->ri_free < ri->ri_max) {
450	if (((volatile tulip_desc_t *) ri->ri_nextin)->d_status & TULIP_DSTS_OWNER)
451	    break;
452
453	if (ri->ri_nextin->d_flag & TULIP_DFLAG_TxLASTSEG) {
454	    if (ri->ri_nextin->d_flag & TULIP_DFLAG_TxSETUPPKT) {
455		/*
456		 * We've just finished processing a setup packet.
457		 * Mark that we can finished it.  If there's not
458		 * another pending, startup the TULIP receiver.
459		 * Make sure we ack the RXSTOPPED so we won't get
460		 * an abormal interrupt indication.
461		 */
462		sc->tulip_flags &= ~TULIP_DOINGSETUP;
463		if ((sc->tulip_flags & TULIP_WANTSETUP) == 0) {
464		    sc->tulip_cmdmode |= TULIP_CMD_RXRUN;
465		    sc->tulip_intrmask |= TULIP_STS_RXSTOPPED;
466		    *sc->tulip_csrs.csr_status = TULIP_STS_RXSTOPPED;
467		    *sc->tulip_csrs.csr_command = sc->tulip_cmdmode;
468		    *sc->tulip_csrs.csr_intr = sc->tulip_intrmask;
469		}
470	   } else {
471		IF_DEQUEUE(&sc->tulip_txq, m);
472		m_freem(m);
473		sc->tulip_if.if_collisions +=
474		    (ri->ri_nextin->d_status & TULIP_DSTS_TxCOLLMASK)
475			>> TULIP_DSTS_V_TxCOLLCNT;
476		if (ri->ri_nextin->d_status & TULIP_DSTS_ERRSUM)
477		    sc->tulip_if.if_oerrors++;
478		xmits++;
479	    }
480	}
481
482	if (++ri->ri_nextin == ri->ri_last)
483	    ri->ri_nextin = ri->ri_first;
484	ri->ri_free++;
485	sc->tulip_if.if_flags &= ~IFF_OACTIVE;
486    }
487    sc->tulip_if.if_opackets += xmits;
488    return xmits;
489}
490
491static int
492tulip_txsegment(
493    tulip_softc_t *sc,
494    struct mbuf *m,
495    tulip_addrvec_t *avp,
496    size_t maxseg)
497{
498    int segcnt;
499
500    for (segcnt = 0; m; m = m->m_next) {
501	int len = m->m_len;
502	caddr_t addr = mtod(m, caddr_t);
503	unsigned clsize = CLBYTES - (((u_long) addr) & (CLBYTES-1));
504
505	while (len > 0) {
506	    unsigned slen = min(len, clsize);
507	    if (segcnt < maxseg) {
508		avp->addr = vtophys(addr);
509		avp->length = slen;
510	    }
511	    len -= slen;
512	    addr += slen;
513	    clsize = CLBYTES;
514	    avp++;
515	    segcnt++;
516	}
517    }
518    if (segcnt >= maxseg) {
519	printf("%s%d: tulip_txsegment: extremely fragmented packet encountered (%d segments)\n",
520	       sc->tulip_name, sc->tulip_unit, segcnt);
521	return -1;
522    }
523    avp->addr = 0;
524    avp->length = 0;
525    return segcnt;
526}
527
528static void
529tulip_start(
530    struct ifnet *ifp)
531{
532    tulip_softc_t *sc = (tulip_softc_t *) ifp;
533    struct ifqueue *ifq = &ifp->if_snd;
534    tulip_ringinfo_t *ri = &sc->tulip_txinfo;
535    tulip_desc_t *sop, *eop;
536    struct mbuf *m;
537    tulip_addrvec_t addrvec[TULIP_MAX_TXSEG+1], *avp;
538    int segcnt;
539    tulip_uint32_t d_status;
540
541    if ((ifp->if_flags & IFF_RUNNING) == 0)
542	return;
543
544    for (;;) {
545	if (sc->tulip_flags & TULIP_WANTSETUP) {
546	    if ((sc->tulip_flags & TULIP_DOINGSETUP) || ri->ri_free == 1) {
547		ifp->if_flags |= IFF_OACTIVE;
548		return;
549	    }
550	    bcopy(sc->tulip_setupdata, sc->tulip_setupbuf,
551		   sizeof(sc->tulip_setupbuf));
552	    sc->tulip_flags &= ~TULIP_WANTSETUP;
553	    sc->tulip_flags |= TULIP_DOINGSETUP;
554	    ri->ri_free--;
555	    ri->ri_nextout->d_flag &= TULIP_DFLAG_ENDRING|TULIP_DFLAG_CHAIN;
556	    ri->ri_nextout->d_flag |= TULIP_DFLAG_TxFIRSTSEG|TULIP_DFLAG_TxLASTSEG
557		    |TULIP_DFLAG_TxSETUPPKT|TULIP_DFLAG_TxWANTINTR;
558	    if (sc->tulip_flags & TULIP_WANTHASH)
559		ri->ri_nextout->d_flag |= TULIP_DFLAG_TxHASHFILT;
560	    ri->ri_nextout->d_length1 = sizeof(sc->tulip_setupbuf);
561	    ri->ri_nextout->d_addr1 = vtophys(sc->tulip_setupbuf);
562	    ri->ri_nextout->d_length2 = 0;
563	    ri->ri_nextout->d_addr2 = 0;
564	    ri->ri_nextout->d_status = TULIP_DSTS_OWNER;
565	    *sc->tulip_csrs.csr_txpoll = 1;
566	    /*
567	     * Advance the ring for the next transmit packet.
568	     */
569	    if (++ri->ri_nextout == ri->ri_last)
570		ri->ri_nextout = ri->ri_first;
571	}
572
573	IF_DEQUEUE(ifq, m);
574	if (m == NULL)
575	    break;
576
577	/*
578	 * First find out how many and which different pages
579	 * the mbuf data occupies.  Then check to see if we
580	 * have enough descriptor space in our transmit ring
581	 * to actually send it.
582	 */
583	segcnt = tulip_txsegment(sc, m, addrvec,
584				 min(ri->ri_max - 1, TULIP_MAX_TXSEG));
585	if (segcnt < 0) {
586	    struct mbuf *m0;
587	    MGETHDR(m0, M_DONTWAIT, MT_DATA);
588	    if (m0 != NULL) {
589		if (m->m_pkthdr.len > MHLEN) {
590		    MCLGET(m0, M_DONTWAIT);
591		    if ((m0->m_flags & M_EXT) == 0) {
592			m_freem(m);
593			continue;
594		    }
595		}
596		m_copydata(m, 0, m0->m_pkthdr.len, mtod(m0, caddr_t));
597		m0->m_pkthdr.len = m0->m_len = m->m_pkthdr.len;
598		m_freem(m);
599		IF_PREPEND(ifq, m0);
600		continue;
601	    } else {
602		m_freem(m);
603		continue;
604	    }
605	}
606	if (ri->ri_free - 2 <= (segcnt + 1) >> 1)
607	    break;
608
609	ri->ri_free -= (segcnt + 1) >> 1;
610	/*
611	 * Now we fill in our transmit descriptors.  This is
612	 * a bit reminiscent of going on the Ark two by two
613	 * since each descriptor for the TULIP can describe
614	 * two buffers.  So we advance through the address
615	 * vector two entries at a time to to fill each
616	 * descriptor.  Clear the first and last segment bits
617	 * in each descriptor (actually just clear everything
618	 * but the end-of-ring or chain bits) to make sure
619	 * we don't get messed up by previously sent packets.
620	 */
621	sop = ri->ri_nextout;
622	d_status = 0;
623	avp = addrvec;
624	do {
625	    eop = ri->ri_nextout;
626	    eop->d_flag &= TULIP_DFLAG_ENDRING|TULIP_DFLAG_CHAIN;
627	    eop->d_status = d_status;
628	    eop->d_addr1 = avp->addr; eop->d_length1 = avp->length; avp++;
629	    eop->d_addr2 = avp->addr; eop->d_length2 = avp->length; avp++;
630	    d_status = TULIP_DSTS_OWNER;
631	    if (++ri->ri_nextout == ri->ri_last)
632		ri->ri_nextout = ri->ri_first;
633	} while ((segcnt -= 2) > 0);
634#if NBPFILTER > 0
635	    if (sc->tulip_bpf != NULL)
636		bpf_mtap(sc->tulip_bpf, m);
637#endif
638	/*
639	 * The descriptors have been filled in.  Mark the first
640	 * and last segments, indicate we want a transmit complete
641	 * interrupt, give the descriptors to the TULIP, and tell
642	 * it to transmit!
643	 */
644
645	IF_ENQUEUE(&sc->tulip_txq, m);
646	eop->d_flag |= TULIP_DFLAG_TxLASTSEG|TULIP_DFLAG_TxWANTINTR;
647	sop->d_flag |= TULIP_DFLAG_TxFIRSTSEG;
648	sop->d_status = TULIP_DSTS_OWNER;
649
650	*sc->tulip_csrs.csr_txpoll = 1;
651    }
652    if (m != NULL) {
653	ifp->if_flags |= IFF_OACTIVE;
654	IF_PREPEND(ifq, m);
655    }
656}
657
658static int
659tulip_intr(
660    tulip_softc_t *sc)
661{
662    tulip_uint32_t csr;
663
664    while ((csr = *sc->tulip_csrs.csr_status) & (TULIP_STS_NORMALINTR|TULIP_STS_ABNRMLINTR)) {
665	*sc->tulip_csrs.csr_status = csr & sc->tulip_intrmask;
666
667	if (csr & TULIP_STS_SYSERROR) {
668	    if ((csr & TULIP_STS_ERRORMASK) == TULIP_STS_ERR_PARITY) {
669		TULIP_RESET(sc);
670		tulip_init(sc->tulip_unit);
671		return 1;
672	    }
673	}
674	if (csr & TULIP_STS_ABNRMLINTR) {
675	    printf("%s%d: abnormal interrupt: 0x%05x [0x%05x]\n",
676		   sc->tulip_name, sc->tulip_unit, csr, csr & sc->tulip_intrmask);
677	    *sc->tulip_csrs.csr_command = sc->tulip_cmdmode;
678	}
679	if (csr & TULIP_STS_RXINTR)
680	    tulip_rx_intr(sc);
681	if (sc->tulip_txinfo.ri_free < sc->tulip_txinfo.ri_max) {
682	    tulip_tx_intr(sc);
683	    tulip_start(&sc->tulip_if);
684	}
685    }
686    return 1;
687}
688
689/*
690 *  This is the standard method of reading the DEC Address ROMS.
691 */
692static int
693tulip_read_macaddr(
694    tulip_softc_t *sc)
695{
696    int cksum, rom_cksum, idx;
697    tulip_sint32_t csr;
698    unsigned char tmpbuf[8];
699    static u_char testpat[] = { 0xFF, 0, 0x55, 0xAA, 0xFF, 0, 0x55, 0xAA };
700
701    *sc->tulip_csrs.csr_enetrom = 1;
702    for (idx = 0; idx < 32; idx++) {
703	int cnt = 0;
704	while ((csr = *sc->tulip_csrs.csr_enetrom) < 0 && cnt < 10000)
705	    cnt++;
706	sc->tulip_rombuf[idx] = csr & 0xFF;
707    }
708
709    if (bcmp(&sc->tulip_rombuf[0], &sc->tulip_rombuf[16], 8) != 0) {
710	/*
711	 * Some folks don't use the standard ethernet rom format
712	 * but instead just put the address in the first 6 bytes
713	 * of the rom and let the rest be all 0xffs.  (Can we say
714	 * ZNYX???)
715	 */
716	for (idx = 6; idx < 32; idx++) {
717	    if (sc->tulip_rombuf[idx] != 0xFF)
718		return -4;
719	}
720	/*
721	 * Make sure the address is not multicast or locally assigned
722	 * that the OUI is not 00-00-00.
723	 */
724	if ((sc->tulip_rombuf[0] & 3) != 0)
725	    return -4;
726	if (sc->tulip_rombuf[0] == 0 && sc->tulip_rombuf[1] == 0
727		&& sc->tulip_rombuf[2] == 0)
728	    return -4;
729	bcopy(sc->tulip_rombuf, sc->tulip_hwaddr, 6);
730	return 0;
731    }
732    if (bcmp(&sc->tulip_rombuf[24], testpat, 8) != 0)
733	return -3;
734
735    tmpbuf[0] = sc->tulip_rombuf[15]; tmpbuf[1] = sc->tulip_rombuf[14];
736    tmpbuf[2] = sc->tulip_rombuf[13]; tmpbuf[3] = sc->tulip_rombuf[12];
737    tmpbuf[4] = sc->tulip_rombuf[11]; tmpbuf[5] = sc->tulip_rombuf[10];
738    tmpbuf[6] = sc->tulip_rombuf[9];  tmpbuf[7] = sc->tulip_rombuf[8];
739    if (bcmp(&sc->tulip_rombuf[0], tmpbuf, 8) != 0)
740	return -2;
741
742    bcopy(sc->tulip_rombuf, sc->tulip_hwaddr, 6);
743
744    cksum = *(u_short *) &sc->tulip_hwaddr[0];
745    cksum *= 2;
746    if (cksum > 65535) cksum -= 65535;
747    cksum += *(u_short *) &sc->tulip_hwaddr[2];
748    if (cksum > 65535) cksum -= 65535;
749    cksum *= 2;
750    if (cksum > 65535) cksum -= 65535;
751    cksum += *(u_short *) &sc->tulip_hwaddr[4];
752    if (cksum >= 65535) cksum -= 65535;
753
754    rom_cksum = *(u_short *) &sc->tulip_rombuf[6];
755
756    if (cksum != rom_cksum)
757	return -1;
758    return 0;
759}
760
761static unsigned
762tulip_mchash(
763    unsigned char *mca)
764{
765    u_int idx, bit, data, crc = 0xFFFFFFFFUL;
766
767#ifdef __alpha
768    for (data = *(__unaligned u_long *) mca, bit = 0; bit < 48; bit++, data >>=
7691)
770        crc = (crc >> 1) ^ (((crc ^ data) & 1) ? TULIP_CRC32_POLY : 0);
771#else
772    for (idx = 0; idx < 6; idx++)
773        for (data = *mca++, bit = 0; bit < 8; bit++, data >>= 1)
774            crc = (crc >> 1) ^ (((crc ^ data) & 1) ? TULIP_CRC32_POLY : 0);
775#endif
776    return crc & 0x1FF;
777}
778
779static void
780tulip_addr_filter(
781    tulip_softc_t *sc)
782{
783    tulip_uint32_t *sp = sc->tulip_setupdata;
784    struct ether_multistep step;
785    struct ether_multi *enm;
786    int i;
787
788    sc->tulip_flags &= ~TULIP_WANTHASH;
789    sc->tulip_flags |= TULIP_WANTSETUP;
790    sc->tulip_cmdmode &= ~TULIP_CMD_RXRUN;
791    sc->tulip_intrmask &= ~TULIP_STS_RXSTOPPED;
792    if (sc->tulip_ac.ac_multicnt > 14) {
793	unsigned hash;
794	/*
795	 * If we have more than 14 multicasts, we have
796	 * go into hash perfect mode (512 bit multicast
797	 * hash and one perfect hardware).
798	 */
799
800	bzero(sc->tulip_setupdata, sizeof(sc->tulip_setupdata));
801	hash = tulip_mchash(etherbroadcastaddr);
802	sp[hash >> 4] |= 1 << (hash & 0xF);
803	ETHER_FIRST_MULTI(step, &sc->tulip_ac, enm);
804	while (enm != NULL) {
805	    hash = tulip_mchash(enm->enm_addrlo);
806	    sp[hash >> 4] |= 1 << (hash & 0xF);
807	    ETHER_NEXT_MULTI(step, enm);
808	}
809	sc->tulip_cmdmode |= TULIP_WANTHASH;
810	sp[40] = ((u_short *) sc->tulip_ac.ac_enaddr)[0];
811	sp[41] = ((u_short *) sc->tulip_ac.ac_enaddr)[1];
812	sp[42] = ((u_short *) sc->tulip_ac.ac_enaddr)[2];
813    } else {
814	/*
815	 * Else can get perfect filtering for 16 addresses.
816	 */
817	i = 0;
818	ETHER_FIRST_MULTI(step, &sc->tulip_ac, enm);
819	for (; enm != NULL; i++) {
820	    *sp++ = ((u_short *) enm->enm_addrlo)[0];
821	    *sp++ = ((u_short *) enm->enm_addrlo)[1];
822	    *sp++ = ((u_short *) enm->enm_addrlo)[2];
823	    ETHER_NEXT_MULTI(step, enm);
824	}
825	/*
826	 * If an IP address is enabled, turn on broadcast
827	 */
828	if (sc->tulip_ac.ac_ipaddr.s_addr != 0) {
829	    i++;
830	    *sp++ = 0xFFFF;
831	    *sp++ = 0xFFFF;
832	    *sp++ = 0xFFFF;
833	}
834	/*
835	 * Pad the rest with our hardware address
836	 */
837	for (; i < 16; i++) {
838	    *sp++ = ((u_short *) sc->tulip_ac.ac_enaddr)[0];
839	    *sp++ = ((u_short *) sc->tulip_ac.ac_enaddr)[1];
840	    *sp++ = ((u_short *) sc->tulip_ac.ac_enaddr)[2];
841	}
842    }
843}
844
845static int
846tulip_ioctl(
847    struct ifnet *ifp,
848    int cmd,
849    caddr_t data)
850{
851    tulip_softc_t *sc = tulips[ifp->if_unit];
852    struct ifaddr *ifa = (struct ifaddr *)data;
853    struct ifreq *ifr = (struct ifreq *) data;
854    int s, error = 0;
855
856    s = splimp();
857
858    switch (cmd) {
859	case SIOCSIFADDR: {
860
861	    ifp->if_flags |= IFF_UP;
862	    switch(ifa->ifa_addr->sa_family) {
863#ifdef INET
864		case AF_INET: {
865		    ((struct arpcom *)ifp)->ac_ipaddr = IA_SIN(ifa)->sin_addr;
866		    tulip_addr_filter(sc);	/* reset multicast filtering */
867		    (*ifp->if_init)(ifp->if_unit);
868		    arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr);
869		    break;
870		}
871#endif /* INET */
872
873#ifdef NS
874		/* This magic copied from if_is.c; I don't use XNS,
875		 * so I have no way of telling if this actually
876		 * works or not.
877		 */
878		case AF_NS: {
879		    struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
880		    if (ns_nullhost(*ina)) {
881			ina->x_host = *(union ns_host *)(sc->tulip_ac.ac_enaddr);
882		    } else {
883			ifp->if_flags &= ~IFF_RUNNING;
884			bcopy((caddr_t)ina->x_host.c_host,
885			      (caddr_t)sc->tulip_ac.ac_enaddr,
886			      sizeof sc->tulip_ac.ac_enaddr);
887		    }
888
889		    (*ifp->if_init)(ifp->if_unit);
890		    break;
891		}
892#endif /* NS */
893
894		default: {
895		    (*ifp->if_init)(ifp->if_unit);
896		    break;
897		}
898	    }
899	    break;
900	}
901
902	case SIOCSIFFLAGS: {
903	    /*
904	     * Changing the connection forces a reset.
905	     */
906	    if (sc->tulip_flags & TULIP_ALTPHYS) {
907		if ((ifp->if_flags & IFF_ALTPHYS) == 0)
908		    TULIP_RESET(sc);
909	    } else {
910		if (ifp->if_flags & IFF_ALTPHYS)
911		    TULIP_RESET(sc);
912	    }
913	    (*ifp->if_init)(ifp->if_unit);
914	    break;
915	}
916
917	case SIOCADDMULTI:
918	case SIOCDELMULTI: {
919	    /*
920	     * Update multicast listeners
921	     */
922	    if (cmd == SIOCADDMULTI)
923		error = ether_addmulti(ifr, &sc->tulip_ac);
924	    else
925		error = ether_delmulti(ifr, &sc->tulip_ac);
926
927	    if (error == ENETRESET) {
928		tulip_addr_filter(sc);		/* reset multicast filtering */
929		(*ifp->if_init)(ifp->if_unit);
930		error = 0;
931	    }
932	    break;
933	}
934	case SIOCSIFMTU:
935	    /*
936	     * Set the interface MTU.
937	     */
938	    if (ifr->ifr_mtu > ETHERMTU) {
939		error = EINVAL;
940	    } else {
941		ifp->if_mtu = ifr->ifr_mtu;
942	    }
943	    break;
944
945	default: {
946	    error = EINVAL;
947	    break;
948	}
949    }
950
951    splx(s);
952    return error;
953}
954
955static void
956tulip_attach(
957    tulip_softc_t *sc)
958{
959    struct ifnet *ifp = &sc->tulip_if;
960    int cnt;
961
962    ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST;
963
964    *sc->tulip_csrs.csr_sia_connectivity = 0;
965    *sc->tulip_csrs.csr_sia_connectivity = TULIP_SIACONN_10BASET;
966    for (cnt = 0; cnt < 240000; cnt++) {
967	if ((*sc->tulip_csrs.csr_sia_status & TULIP_SIASTS_LINKFAIL) == 0)
968	    break;
969	DELAY(10);
970    }
971    if (*sc->tulip_csrs.csr_sia_status & TULIP_SIASTS_LINKFAIL) {
972	ifp->if_flags |= IFF_ALTPHYS;
973    } else {
974	sc->tulip_flags |= TULIP_ALTPHYS;
975    }
976    TULIP_RESET(sc);
977
978    ifp->if_init = tulip_init;
979    ifp->if_ioctl = tulip_ioctl;
980    ifp->if_output = ether_output;
981    ifp->if_reset = tulip_reset;
982    ifp->if_start = tulip_start;
983
984    printf("%s%d: %s pass %d.%d ethernet address %s\n",
985	   sc->tulip_name, sc->tulip_unit,
986	   tulip_chipdescs[tulip_chipids[sc->tulip_unit]],
987	   (sc->tulip_revinfo & 0xF0) >> 4,
988	   sc->tulip_revinfo & 0x0F,
989	   ether_sprintf(sc->tulip_hwaddr));
990
991    if_attach(ifp);
992
993#if NBPFILTER > 0
994    bpfattach(&sc->tulip_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
995#endif
996}
997
998static void
999tulip_initcsrs(
1000    tulip_softc_t *sc,
1001    volatile tulip_uint32_t *va_csrs,
1002    size_t csr_size)
1003{
1004    sc->tulip_csrs.csr_busmode		= va_csrs +  0 * csr_size;
1005    sc->tulip_csrs.csr_txpoll		= va_csrs +  1 * csr_size;
1006    sc->tulip_csrs.csr_rxpoll		= va_csrs +  2 * csr_size;
1007    sc->tulip_csrs.csr_rxlist		= va_csrs +  3 * csr_size;
1008    sc->tulip_csrs.csr_txlist		= va_csrs +  4 * csr_size;
1009    sc->tulip_csrs.csr_status		= va_csrs +  5 * csr_size;
1010    sc->tulip_csrs.csr_command		= va_csrs +  6 * csr_size;
1011    sc->tulip_csrs.csr_intr		= va_csrs +  7 * csr_size;
1012    sc->tulip_csrs.csr_missed_frame	= va_csrs +  8 * csr_size;
1013    sc->tulip_csrs.csr_enetrom		= va_csrs +  9 * csr_size;
1014    sc->tulip_csrs.csr_reserved		= va_csrs + 10 * csr_size;
1015    sc->tulip_csrs.csr_full_duplex	= va_csrs + 11 * csr_size;
1016    sc->tulip_csrs.csr_sia_status	= va_csrs + 12 * csr_size;
1017    sc->tulip_csrs.csr_sia_connectivity	= va_csrs + 13 * csr_size;
1018    sc->tulip_csrs.csr_sia_tx_rx 	= va_csrs + 14 * csr_size;
1019    sc->tulip_csrs.csr_sia_general	= va_csrs + 15 * csr_size;
1020}
1021
1022static void
1023tulip_initring(
1024    tulip_softc_t *sc,
1025    tulip_ringinfo_t *ri,
1026    tulip_desc_t *descs,
1027    int ndescs)
1028{
1029    ri->ri_max = ndescs;
1030    ri->ri_first = descs;
1031    ri->ri_last = ri->ri_first + ri->ri_max;
1032    bzero((caddr_t) ri->ri_first, sizeof(ri->ri_first[0]) * ri->ri_max);
1033    ri->ri_last[-1].d_flag = TULIP_DFLAG_ENDRING;
1034}
1035
1036#if NPCI > 0
1037/*
1038 * This is the PCI configuration support.  Since the DC21040 is available
1039 * on both EISA and PCI boards, one must be careful in how defines the
1040 * DC21040 in the config file.
1041 */
1042static char* tulip_pci_probe (pcici_t config_id, pcidi_t device_id);
1043static void  tulip_pci_attach(pcici_t config_id, int unit);
1044static u_long tulip_count;
1045
1046struct pci_driver dedevice = {
1047    tulip_pci_probe,
1048    tulip_pci_attach,
1049   &tulip_count,
1050};
1051
1052#define	PCI_CFID	0x00	/* Configuration ID */
1053#define	PCI_CFCS	0x04	/* Configurtion Command/Status */
1054#define	PCI_CFRV	0x08	/* Configuration Revision */
1055#define	PCI_CFLT	0x0c	/* Configuration Latency Timer */
1056#define	PCI_CBIO	0x10	/* Configuration Base IO Address */
1057#define	PCI_CBMA	0x14	/* Configuration Base Memory Address */
1058#define	PCI_CFIT	0x3c	/* Configuration Interrupt */
1059#define	PCI_CFDA	0x40	/* Configuration Driver Area */
1060
1061#define	TULIP_PCI_CSRSIZE	(8 / sizeof(tulip_uint32_t))
1062static char*
1063tulip_pci_probe(
1064    pcici_t config_id,
1065    pcidi_t device_id)
1066{
1067    int idx;
1068    for (idx = 0; idx < NDE; idx++) {
1069	if (tulips[idx] == NULL) {
1070	    if (device_id == 0x00021011ul) {
1071		tulip_chipids[idx] = TULIP_DC21040;
1072		return "Digital DC21040 Ethernet";
1073	    }
1074	    if (device_id == 0x00091011ul) {
1075		tulip_chipids[idx] = TULIP_DC21140;
1076		return "Digital DC21140 Fast Ethernet";
1077	    }
1078	    return NULL;
1079	}
1080    }
1081    return NULL;
1082}
1083
1084static void
1085tulip_pci_attach(
1086    pcici_t config_id,
1087    int unit)
1088{
1089    tulip_softc_t *sc;
1090    int retval, idx;
1091    vm_offset_t va_csrs, pa_csrs;
1092    tulip_desc_t *rxdescs, *txdescs;
1093
1094    sc = (tulip_softc_t *) malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT);
1095    if (sc == NULL)
1096	return;
1097
1098    rxdescs = (tulip_desc_t *)
1099	malloc(sizeof(tulip_desc_t) * TULIP_RXDESCS, M_DEVBUF, M_NOWAIT);
1100    if (rxdescs == NULL) {
1101	free((caddr_t) sc, M_DEVBUF);
1102	return;
1103    }
1104
1105    txdescs = (tulip_desc_t *)
1106	malloc(sizeof(tulip_desc_t) * TULIP_TXDESCS, M_DEVBUF, M_NOWAIT);
1107    if (txdescs == NULL) {
1108	free((caddr_t) rxdescs, M_DEVBUF);
1109	free((caddr_t) sc, M_DEVBUF);
1110	return;
1111    }
1112
1113    bzero(sc, sizeof(sc));				/* Zero out the softc*/
1114    sc->tulip_rxspace = kmem_alloc(kernel_map, TULIP_RXSPACE + NBPG);
1115    /*
1116     * We've allocated an extra page of receive space so we can double map
1117     * the first page of the receive space into the page after the last page
1118     * of the receive space.  This means that even if a receive wraps around
1119     * the end of the receive space, it will still virtually contiguous and
1120     * that greatly simplifies the recevie logic.
1121     */
1122    pmap_enter(pmap_kernel(), sc->tulip_rxspace + TULIP_RXSPACE,
1123	       vtophys(sc->tulip_rxspace), VM_PROT_READ, TRUE);
1124
1125    sc->tulip_unit = unit;
1126    sc->tulip_name = "de";
1127    retval = pci_map_mem(config_id, PCI_CBMA, &va_csrs, &pa_csrs);
1128    if (!retval) {
1129	kmem_free(kernel_map, sc->tulip_rxspace, TULIP_RXSPACE + NBPG);
1130	free((caddr_t) txdescs, M_DEVBUF);
1131	free((caddr_t) rxdescs, M_DEVBUF);
1132	free((caddr_t) sc, M_DEVBUF);
1133	return;
1134    }
1135    tulips[unit] = sc;
1136    tulip_initcsrs(sc, (volatile tulip_uint32_t *) va_csrs, TULIP_PCI_CSRSIZE);
1137    tulip_initring(sc, &sc->tulip_rxinfo, rxdescs, TULIP_RXDESCS);
1138    tulip_initring(sc, &sc->tulip_txinfo, txdescs, TULIP_TXDESCS);
1139    sc->tulip_revinfo = pci_conf_read(config_id, PCI_CFRV);
1140    if ((retval = tulip_read_macaddr(sc)) < 0) {
1141	printf("de%d: can't read ENET ROM (why=%d) (", sc->tulip_unit, retval);
1142	for (idx = 0; idx < 32; idx++)
1143	    printf("%02x", sc->tulip_rombuf[idx]);
1144	printf("\n");
1145	printf("%s%d: %s pass %d.%d ethernet address %s\n",
1146	       sc->tulip_name, sc->tulip_unit,
1147	       tulip_chipdescs[tulip_chipids[sc->tulip_unit]],
1148	       (sc->tulip_revinfo & 0xF0) >> 4, sc->tulip_revinfo & 0x0F,
1149	       "unknown");
1150    } else {
1151	TULIP_RESET(sc);
1152	tulip_attach(sc);
1153	pci_map_int (config_id, tulip_intr, (void*) sc, &net_imask);
1154    }
1155}
1156#endif /* NPCI > 0 */
1157#endif /* NDE > 0 */
1158