xref: /original-bsd/sys/hp300/dev/if_le.c (revision 7f22226e)
1 /*
2  * Copyright (c) 1982, 1990 The Regents of the University of California.
3  * All rights reserved.
4  *
5  * %sccs.include.redist.c%
6  *
7  *	@(#)if_le.c	7.2 (Berkeley) 12/16/90
8  */
9 
10 #include "le.h"
11 #if NLE > 0
12 
13 /*
14  * AMD 7990 LANCE
15  *
16  * This driver will generate and accept tailer encapsulated packets even
17  * though it buys us nothing.  The motivation was to avoid incompatibilities
18  * with VAXen, SUNs, and others that handle and benefit from them.
19  * This reasoning is dubious.
20  */
21 #include "sys/param.h"
22 #include "sys/systm.h"
23 #include "sys/mbuf.h"
24 #include "sys/buf.h"
25 #include "sys/protosw.h"
26 #include "sys/socket.h"
27 #include "sys/syslog.h"
28 #include "sys/ioctl.h"
29 #include "sys/errno.h"
30 
31 #include "net/if.h"
32 #include "net/netisr.h"
33 #include "net/route.h"
34 
35 #ifdef INET
36 #include "netinet/in.h"
37 #include "netinet/in_systm.h"
38 #include "netinet/in_var.h"
39 #include "netinet/ip.h"
40 #include "netinet/if_ether.h"
41 #endif
42 
43 #ifdef NS
44 #include "netns/ns.h"
45 #include "netns/ns_if.h"
46 #endif
47 
48 #ifdef RMP
49 #include "netrmp/rmp.h"
50 #include "netrmp/rmp_var.h"
51 #endif
52 
53 #include "../include/cpu.h"
54 #include "../hp300/isr.h"
55 #include "../include/mtpr.h"
56 #include "device.h"
57 #include "if_lereg.h"
58 
59 /* offsets for:	   ID,   REGS,    MEM,  NVRAM */
60 int	lestd[] = { 0, 0x4000, 0x8000, 0xC008 };
61 
62 int	leattach();
63 struct	driver ledriver = {
64 	leattach, "le",
65 };
66 
67 struct	isr le_isr[NLE];
68 int	ledebug = 0;		/* console error messages */
69 
70 int	leintr(), leinit(), leioctl(), lestart(), ether_output();
71 struct	mbuf *leget();
72 extern	struct ifnet loif;
73 
74 /*
75  * Ethernet software status per interface.
76  *
77  * Each interface is referenced by a network interface structure,
78  * le_if, which the routing code uses to locate the interface.
79  * This structure contains the output queue for the interface, its address, ...
80  */
81 struct	le_softc {
82 	struct	arpcom sc_ac;	/* common Ethernet structures */
83 #define	sc_if	sc_ac.ac_if	/* network-visible interface */
84 #define	sc_addr	sc_ac.ac_enaddr	/* hardware Ethernet address */
85 	struct	lereg0 *sc_r0;	/* DIO registers */
86 	struct	lereg1 *sc_r1;	/* LANCE registers */
87 	struct	lereg2 *sc_r2;	/* dual-port RAM */
88 	int	sc_rmd;		/* predicted next rmd to process */
89 	int	sc_runt;
90 	int	sc_jab;
91 	int	sc_merr;
92 	int	sc_babl;
93 	int	sc_cerr;
94 	int	sc_miss;
95 	int	sc_xint;
96 	int	sc_xown;
97 	int	sc_uflo;
98 	int	sc_rxlen;
99 	int	sc_rxoff;
100 	int	sc_txoff;
101 	int	sc_busy;
102 } le_softc[NLE];
103 
104 /* access LANCE registers */
105 #define	LERDWR(cntl, src, dst) \
106 	do { \
107 		(dst) = (src); \
108 	} while (((cntl)->ler0_status & LE_ACK) == 0);
109 
110 /*
111  * Interface exists: make available by filling in network interface
112  * record.  System will initialize the interface when it is ready
113  * to accept packets.
114  */
115 leattach(hd)
116 	struct hp_device *hd;
117 {
118 	register struct lereg0 *ler0;
119 	register struct lereg2 *ler2;
120 	struct lereg2 *lemem = 0;
121 	struct le_softc *le = &le_softc[hd->hp_unit];
122 	struct ifnet *ifp = &le->sc_if;
123 	char *cp;
124 	int i;
125 
126 	ler0 = le->sc_r0 = (struct lereg0 *)(lestd[0] + (int)hd->hp_addr);
127 	le->sc_r1 = (struct lereg1 *)(lestd[1] + (int)hd->hp_addr);
128 	ler2 = le->sc_r2 = (struct lereg2 *)(lestd[2] + (int)hd->hp_addr);
129 	if (ler0->ler0_id != LEID)
130 		return(0);
131 	le_isr[hd->hp_unit].isr_intr = leintr;
132 	hd->hp_ipl = le_isr[hd->hp_unit].isr_ipl = LE_IPL(ler0->ler0_status);
133 	le_isr[hd->hp_unit].isr_arg = hd->hp_unit;
134 	ler0->ler0_id = 0xFF;
135 	DELAY(100);
136 
137 	/*
138 	 * Read the ethernet address off the board, one nibble at a time.
139 	 */
140 	cp = (char *)(lestd[3] + (int)hd->hp_addr);
141 	for (i = 0; i < sizeof(le->sc_addr); i++) {
142 		le->sc_addr[i] = (*++cp & 0xF) << 4;
143 		cp++;
144 		le->sc_addr[i] |= *++cp & 0xF;
145 		cp++;
146 	}
147 	printf("le%d: hardware address %s\n", hd->hp_unit,
148 		ether_sprintf(le->sc_addr));
149 
150 	/*
151 	 * Setup for transmit/receive
152 	 */
153 	ler2->ler2_mode = LE_MODE;
154 	ler2->ler2_padr[0] = le->sc_addr[1];
155 	ler2->ler2_padr[1] = le->sc_addr[0];
156 	ler2->ler2_padr[2] = le->sc_addr[3];
157 	ler2->ler2_padr[3] = le->sc_addr[2];
158 	ler2->ler2_padr[4] = le->sc_addr[5];
159 	ler2->ler2_padr[5] = le->sc_addr[4];
160 #ifdef RMP
161 	/*
162 	 * Set up logical addr filter to accept multicast 9:0:9:0:0:4
163 	 * This should be an ioctl() to the driver.  (XXX)
164 	 */
165 	ler2->ler2_ladrf0 = 0x00100000;
166 	ler2->ler2_ladrf1 = 0x0;
167 #else
168 	ler2->ler2_ladrf0 = 0;
169 	ler2->ler2_ladrf1 = 0;
170 #endif
171 	ler2->ler2_rlen = LE_RLEN;
172 	ler2->ler2_rdra = (int)lemem->ler2_rmd;
173 	ler2->ler2_tlen = LE_TLEN;
174 	ler2->ler2_tdra = (int)lemem->ler2_tmd;
175 	isrlink(&le_isr[hd->hp_unit]);
176 	ler0->ler0_status = LE_IE;
177 
178 	ifp->if_unit = hd->hp_unit;
179 	ifp->if_name = "le";
180 	ifp->if_mtu = ETHERMTU;
181 	ifp->if_init = leinit;
182 	ifp->if_ioctl = leioctl;
183 	ifp->if_output = ether_output;
184 	ifp->if_start = lestart;
185 	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
186 	if_attach(ifp);
187 	return (1);
188 }
189 
190 ledrinit(ler2)
191 	register struct lereg2 *ler2;
192 {
193 	register struct lereg2 *lemem = 0;
194 	register int i;
195 
196 	for (i = 0; i < LERBUF; i++) {
197 		ler2->ler2_rmd[i].rmd0 = (int)lemem->ler2_rbuf[i];
198 		ler2->ler2_rmd[i].rmd1 = LE_OWN;
199 		ler2->ler2_rmd[i].rmd2 = -LEMTU;
200 		ler2->ler2_rmd[i].rmd3 = 0;
201 	}
202 	for (i = 0; i < LETBUF; i++) {
203 		ler2->ler2_tmd[i].tmd0 = (int)lemem->ler2_tbuf[i];
204 		ler2->ler2_tmd[i].tmd1 = 0;
205 		ler2->ler2_tmd[i].tmd2 = 0;
206 		ler2->ler2_tmd[i].tmd3 = 0;
207 	}
208 }
209 
210 lereset(unit)
211 	register int unit;
212 {
213 	register struct le_softc *le = &le_softc[unit];
214 	register struct lereg0 *ler0 = le->sc_r0;
215 	register struct lereg1 *ler1 = le->sc_r1;
216 	register struct lereg2 *lemem = 0;
217 	register int timo = 100000;
218 	register int stat;
219 
220 #ifdef lint
221 	stat = unit;
222 #endif
223 	LERDWR(ler0, LE_CSR0, ler1->ler1_rap);
224 	LERDWR(ler0, LE_STOP, ler1->ler1_rdp);
225 	ledrinit(le->sc_r2);
226 	le->sc_rmd = 0;
227 	LERDWR(ler0, LE_CSR1, ler1->ler1_rap);
228 	LERDWR(ler0, (int)&lemem->ler2_mode, ler1->ler1_rdp);
229 	LERDWR(ler0, LE_CSR2, ler1->ler1_rap);
230 	LERDWR(ler0, 0, ler1->ler1_rdp);
231 	LERDWR(ler0, LE_CSR0, ler1->ler1_rap);
232 	LERDWR(ler0, LE_INIT, ler1->ler1_rdp);
233 	do {
234 		if (--timo == 0) {
235 			printf("le%d: init timeout, stat = 0x%x\n",
236 			       unit, stat);
237 			break;
238 		}
239 		LERDWR(ler0, ler1->ler1_rdp, stat);
240 	} while ((stat & LE_IDON) == 0);
241 	LERDWR(ler0, LE_STOP, ler1->ler1_rdp);
242 	LERDWR(ler0, LE_CSR3, ler1->ler1_rap);
243 	LERDWR(ler0, LE_BSWP, ler1->ler1_rdp);
244 	LERDWR(ler0, LE_CSR0, ler1->ler1_rap);
245 	LERDWR(ler0, LE_STRT | LE_INEA, ler1->ler1_rdp);
246 	le->sc_if.if_flags &= ~IFF_OACTIVE;
247 }
248 
249 /*
250  * Initialization of interface
251  */
252 leinit(unit)
253 	int unit;
254 {
255 	struct le_softc *le = &le_softc[unit];
256 	register struct ifnet *ifp = &le->sc_if;
257 	int s;
258 
259 	/* not yet, if address still unknown */
260 	if (ifp->if_addrlist == (struct ifaddr *)0)
261 		return;
262 	if ((ifp->if_flags & IFF_RUNNING) == 0) {
263 		s = splimp();
264 		ifp->if_flags |= IFF_RUNNING;
265 		lereset(unit);
266 	        (void) lestart(ifp);
267 		splx(s);
268 	}
269 }
270 
271 /*
272  * Start output on interface.  Get another datagram to send
273  * off of the interface queue, and copy it to the interface
274  * before starting the output.
275  */
276 lestart(ifp)
277 	struct ifnet *ifp;
278 {
279 	register struct le_softc *le = &le_softc[ifp->if_unit];
280 	register struct letmd *tmd;
281 	register struct mbuf *m;
282 	int len;
283 
284 	if ((le->sc_if.if_flags & IFF_RUNNING) == 0)
285 		return (0);
286 	IF_DEQUEUE(&le->sc_if.if_snd, m);
287 	if (m == 0)
288 		return (0);
289 	len = leput(le->sc_r2->ler2_tbuf[0], m);
290 	tmd = le->sc_r2->ler2_tmd;
291 	tmd->tmd3 = 0;
292 	tmd->tmd2 = -len;
293 	tmd->tmd1 = LE_OWN | LE_STP | LE_ENP;
294 	le->sc_if.if_flags |= IFF_OACTIVE;
295 	return (0);
296 }
297 
298 leintr(unit)
299 	register int unit;
300 {
301 	register struct le_softc *le = &le_softc[unit];
302 	register struct lereg0 *ler0 = le->sc_r0;
303 	register struct lereg1 *ler1;
304 	register int stat;
305 
306 	if ((ler0->ler0_status & LE_IR) == 0)
307 		return(0);
308 	if (ler0->ler0_status & LE_JAB) {
309 		le->sc_jab++;
310 		lereset(unit);
311 		return(1);
312 	}
313 	ler1 = le->sc_r1;
314 	LERDWR(ler0, ler1->ler1_rdp, stat);
315 	if (stat & LE_SERR) {
316 		leerror(unit, stat);
317 		if (stat & LE_MERR) {
318 			le->sc_merr++;
319 			lereset(unit);
320 			return(1);
321 		}
322 		if (stat & LE_BABL)
323 			le->sc_babl++;
324 		if (stat & LE_CERR)
325 			le->sc_cerr++;
326 		if (stat & LE_MISS)
327 			le->sc_miss++;
328 		LERDWR(ler0, LE_BABL|LE_CERR|LE_MISS|LE_INEA, ler1->ler1_rdp);
329 	}
330 	if ((stat & LE_RXON) == 0) {
331 		le->sc_rxoff++;
332 		lereset(unit);
333 		return(1);
334 	}
335 	if ((stat & LE_TXON) == 0) {
336 		le->sc_txoff++;
337 		lereset(unit);
338 		return(1);
339 	}
340 	if (stat & LE_RINT) {
341 		/* interrupt is cleared in lerint */
342 		lerint(unit);
343 	}
344 	if (stat & LE_TINT) {
345 		LERDWR(ler0, LE_TINT|LE_INEA, ler1->ler1_rdp);
346 		lexint(unit);
347 	}
348 	return(1);
349 }
350 
351 /*
352  * Ethernet interface transmitter interrupt.
353  * Start another output if more data to send.
354  */
355 lexint(unit)
356 	register int unit;
357 {
358 	register struct le_softc *le = &le_softc[unit];
359 	register struct letmd *tmd = le->sc_r2->ler2_tmd;
360 
361 	if ((le->sc_if.if_flags & IFF_OACTIVE) == 0) {
362 		le->sc_xint++;
363 		return;
364 	}
365 	if (tmd->tmd1 & LE_OWN) {
366 		le->sc_xown++;
367 		return;
368 	}
369 	if (tmd->tmd1 & LE_ERR) {
370 err:
371 		lexerror(unit);
372 		le->sc_if.if_oerrors++;
373 		if (tmd->tmd3 & (LE_TBUFF|LE_UFLO)) {
374 			le->sc_uflo++;
375 			lereset(unit);
376 		}
377 		else if (tmd->tmd3 & LE_LCOL)
378 			le->sc_if.if_collisions++;
379 		else if (tmd->tmd3 & LE_RTRY)
380 			le->sc_if.if_collisions += 16;
381 	}
382 	else if (tmd->tmd3 & LE_TBUFF)
383 		/* XXX documentation says BUFF not included in ERR */
384 		goto err;
385 	else if (tmd->tmd1 & LE_ONE)
386 		le->sc_if.if_collisions++;
387 	else if (tmd->tmd1 & LE_MORE)
388 		/* what is the real number? */
389 		le->sc_if.if_collisions += 2;
390 	else
391 		le->sc_if.if_opackets++;
392 	le->sc_if.if_flags &= ~IFF_OACTIVE;
393 	(void) lestart(&le->sc_if);
394 }
395 
396 #define	LENEXTRMP \
397 	if (++bix == LERBUF) bix = 0, rmd = le->sc_r2->ler2_rmd; else ++rmd
398 
399 /*
400  * Ethernet interface receiver interrupt.
401  * If input error just drop packet.
402  * Decapsulate packet based on type and pass to type specific
403  * higher-level input routine.
404  */
405 lerint(unit)
406 	int unit;
407 {
408 	register struct le_softc *le = &le_softc[unit];
409 	register int bix = le->sc_rmd;
410 	register struct lermd *rmd = &le->sc_r2->ler2_rmd[bix];
411 
412 	/*
413 	 * Out of sync with hardware, should never happen?
414 	 */
415 	if (rmd->rmd1 & LE_OWN) {
416 		LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp);
417 		return;
418 	}
419 
420 	/*
421 	 * Process all buffers with valid data
422 	 */
423 	while ((rmd->rmd1 & LE_OWN) == 0) {
424 		int len = rmd->rmd3;
425 
426 		/* Clear interrupt to avoid race condition */
427 		LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp);
428 
429 		if (rmd->rmd1 & LE_ERR) {
430 			le->sc_rmd = bix;
431 			lererror(unit, "bad packet");
432 			le->sc_if.if_ierrors++;
433 		} else if ((rmd->rmd1 & (LE_STP|LE_ENP)) != (LE_STP|LE_ENP)) {
434 			/*
435 			 * Find the end of the packet so we can see how long
436 			 * it was.  We still throw it away.
437 			 */
438 			do {
439 				LERDWR(le->sc_r0, LE_RINT|LE_INEA,
440 				       le->sc_r1->ler1_rdp);
441 				rmd->rmd3 = 0;
442 				rmd->rmd1 = LE_OWN;
443 				LENEXTRMP;
444 			} while (!(rmd->rmd1 & (LE_OWN|LE_ERR|LE_STP|LE_ENP)));
445 			le->sc_rmd = bix;
446 			lererror(unit, "chained buffer");
447 			le->sc_rxlen++;
448 			/*
449 			 * If search terminated without successful completion
450 			 * we reset the hardware (conservative).
451 			 */
452 			if ((rmd->rmd1 & (LE_OWN|LE_ERR|LE_STP|LE_ENP)) !=
453 			    LE_ENP) {
454 				lereset(unit);
455 				return;
456 			}
457 		} else
458 			leread(unit, le->sc_r2->ler2_rbuf[bix], len);
459 		rmd->rmd3 = 0;
460 		rmd->rmd1 = LE_OWN;
461 		LENEXTRMP;
462 	}
463 	le->sc_rmd = bix;
464 }
465 
466 leread(unit, buf, len)
467 	int unit;
468 	char *buf;
469 	int len;
470 {
471 	register struct le_softc *le = &le_softc[unit];
472 	register struct ether_header *et;
473     	struct mbuf *m;
474 	int off, resid;
475 
476 	le->sc_if.if_ipackets++;
477 	et = (struct ether_header *)buf;
478 	et->ether_type = ntohs((u_short)et->ether_type);
479 	/* adjust input length to account for header and CRC */
480 	len = len - sizeof(struct ether_header) - 4;
481 
482 #ifdef RMP
483 	/*  (XXX)
484 	 *
485 	 *  If Ethernet Type field is < MaxPacketSize, we probably have
486 	 *  a IEEE802 packet here.  Make sure that the size is at least
487 	 *  that of the HP LLC.  Also do sanity checks on length of LLC
488 	 *  (old Ethernet Type field) and packet length.
489 	 *
490 	 *  Provided the above checks succeed, change `len' to reflect
491 	 *  the length of the LLC (i.e. et->ether_type) and change the
492 	 *  type field to ETHERTYPE_IEEE so we can switch() on it later.
493 	 *  Yes, this is a hack and will eventually be done "right".
494 	 */
495 	if (et->ether_type <= IEEE802LEN_MAX && len >= sizeof(struct hp_llc) &&
496 	    len >= et->ether_type && len >= IEEE802LEN_MIN) {
497 		len = et->ether_type;
498 		et->ether_type = ETHERTYPE_IEEE;	/* hack! */
499 	}
500 #endif
501 
502 #define	ledataaddr(et, off, type)	((type)(((caddr_t)((et)+1)+(off))))
503 	if (et->ether_type >= ETHERTYPE_TRAIL &&
504 	    et->ether_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
505 		off = (et->ether_type - ETHERTYPE_TRAIL) * 512;
506 		if (off >= ETHERMTU)
507 			return;		/* sanity */
508 		et->ether_type = ntohs(*ledataaddr(et, off, u_short *));
509 		resid = ntohs(*(ledataaddr(et, off+2, u_short *)));
510 		if (off + resid > len)
511 			return;		/* sanity */
512 		len = off + resid;
513 	} else
514 		off = 0;
515 
516 	if (len <= 0) {
517 		if (ledebug)
518 			log(LOG_WARNING,
519 			    "le%d: ierror(runt packet): from %s: len=%d\n",
520 			    unit, ether_sprintf(et->ether_shost), len);
521 		le->sc_runt++;
522 		le->sc_if.if_ierrors++;
523 		return;
524 	}
525 
526 	/*
527 	 * Pull packet off interface.  Off is nonzero if packet
528 	 * has trailing header; leget will then force this header
529 	 * information to be at the front, but we still have to drop
530 	 * the type and length which are at the front of any trailer data.
531 	 */
532 	m = leget(buf, len, off, &le->sc_if);
533 	if (m == 0)
534 		return;
535 #ifdef RMP
536 	/*
537 	 * (XXX)
538 	 * This needs to be integrated with the ISO stuff in ether_input()
539 	 */
540 	if (et->ether_type == ETHERTYPE_IEEE) {
541 		/*
542 		 *  Snag the Logical Link Control header (IEEE 802.2).
543 		 */
544 		struct hp_llc *llc = &(mtod(m, struct rmp_packet *)->hp_llc);
545 
546 		/*
547 		 *  If the DSAP (and HP's extended DXSAP) indicate this
548 		 *  is an RMP packet, hand it to the raw input routine.
549 		 */
550 		if (llc->dsap == IEEE_DSAP_HP && llc->dxsap == HPEXT_DXSAP) {
551 			static struct sockproto rmp_sp = {AF_RMP,RMPPROTO_BOOT};
552 			static struct sockaddr rmp_src = {AF_RMP};
553 			static struct sockaddr rmp_dst = {AF_RMP};
554 
555 			bcopy(et->ether_shost, rmp_src.sa_data,
556 			      sizeof(et->ether_shost));
557 			bcopy(et->ether_dhost, rmp_dst.sa_data,
558 			      sizeof(et->ether_dhost));
559 
560 			raw_input(m, &rmp_sp, &rmp_src, &rmp_dst);
561 			return;
562 		}
563 	}
564 #endif
565 	ether_input(&le->sc_if, et, m);
566 }
567 
568 /*
569  * Routine to copy from mbuf chain to transmit
570  * buffer in board local memory.
571  */
572 leput(lebuf, m)
573 	register char *lebuf;
574 	register struct mbuf *m;
575 {
576 	register struct mbuf *mp;
577 	register int len, tlen = 0;
578 
579 	for (mp = m; mp; mp = mp->m_next) {
580 		len = mp->m_len;
581 		if (len == 0)
582 			continue;
583 		tlen += len;
584 		bcopy(mtod(mp, char *), lebuf, len);
585 		lebuf += len;
586 	}
587 	m_freem(m);
588 	if (tlen < LEMINSIZE) {
589 		bzero(lebuf, LEMINSIZE - tlen);
590 		tlen = LEMINSIZE;
591 	}
592 	return(tlen);
593 }
594 
595 /*
596  * Routine to copy from board local memory into mbufs.
597  */
598 struct mbuf *
599 leget(lebuf, totlen, off0, ifp)
600 	char *lebuf;
601 	int totlen, off0;
602 	struct ifnet *ifp;
603 {
604 	register struct mbuf *m;
605 	struct mbuf *top = 0, **mp = &top;
606 	register int off = off0, len;
607 	register char *cp;
608 	char *epkt;
609 
610 	lebuf += sizeof (struct ether_header);
611 	cp = lebuf;
612 	epkt = cp + totlen;
613 	if (off) {
614 		cp += off + 2 * sizeof(u_short);
615 		totlen -= 2 * sizeof(u_short);
616 	}
617 
618 	MGETHDR(m, M_DONTWAIT, MT_DATA);
619 	if (m == 0)
620 		return (0);
621 	m->m_pkthdr.rcvif = ifp;
622 	m->m_pkthdr.len = totlen;
623 	m->m_len = MHLEN;
624 
625 	while (totlen > 0) {
626 		if (top) {
627 			MGET(m, M_DONTWAIT, MT_DATA);
628 			if (m == 0) {
629 				m_freem(top);
630 				return (0);
631 			}
632 			m->m_len = MLEN;
633 		}
634 		len = min(totlen, epkt - cp);
635 		if (len >= MINCLSIZE) {
636 			MCLGET(m, M_DONTWAIT);
637 			if (m->m_flags & M_EXT)
638 				m->m_len = len = min(len, MCLBYTES);
639 			else
640 				len = m->m_len;
641 		} else {
642 			/*
643 			 * Place initial small packet/header at end of mbuf.
644 			 */
645 			if (len < m->m_len) {
646 				if (top == 0 && len + max_linkhdr <= m->m_len)
647 					m->m_data += max_linkhdr;
648 				m->m_len = len;
649 			} else
650 				len = m->m_len;
651 		}
652 		bcopy(cp, mtod(m, caddr_t), (unsigned)len);
653 		cp += len;
654 		*mp = m;
655 		mp = &m->m_next;
656 		totlen -= len;
657 		if (cp == epkt)
658 			cp = lebuf;
659 	}
660 	return (top);
661 }
662 
663 /*
664  * Process an ioctl request.
665  */
666 leioctl(ifp, cmd, data)
667 	register struct ifnet *ifp;
668 	int cmd;
669 	caddr_t data;
670 {
671 	register struct ifaddr *ifa = (struct ifaddr *)data;
672 	struct le_softc *le = &le_softc[ifp->if_unit];
673 	struct lereg1 *ler1 = le->sc_r1;
674 	int s = splimp(), error = 0;
675 
676 	switch (cmd) {
677 
678 	case SIOCSIFADDR:
679 		ifp->if_flags |= IFF_UP;
680 		switch (ifa->ifa_addr->sa_family) {
681 #ifdef INET
682 		case AF_INET:
683 			leinit(ifp->if_unit);	/* before arpwhohas */
684 			((struct arpcom *)ifp)->ac_ipaddr =
685 				IA_SIN(ifa)->sin_addr;
686 			arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr);
687 			break;
688 #endif
689 #ifdef NS
690 		case AF_NS:
691 		    {
692 			register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
693 
694 			if (ns_nullhost(*ina))
695 				ina->x_host = *(union ns_host *)(le->sc_addr);
696 			else {
697 				/*
698 				 * The manual says we can't change the address
699 				 * while the receiver is armed,
700 				 * so reset everything
701 				 */
702 				ifp->if_flags &= ~IFF_RUNNING;
703 				bcopy((caddr_t)ina->x_host.c_host,
704 				    (caddr_t)le->sc_addr, sizeof(le->sc_addr));
705 			}
706 			leinit(ifp->if_unit); /* does le_setaddr() */
707 			break;
708 		    }
709 #endif
710 		default:
711 			leinit(ifp->if_unit);
712 			break;
713 		}
714 		break;
715 
716 	case SIOCSIFFLAGS:
717 		if ((ifp->if_flags & IFF_UP) == 0 &&
718 		    ifp->if_flags & IFF_RUNNING) {
719 			LERDWR(le->sc_r0, LE_STOP, ler1->ler1_rdp);
720 			ifp->if_flags &= ~IFF_RUNNING;
721 		} else if (ifp->if_flags & IFF_UP &&
722 		    (ifp->if_flags & IFF_RUNNING) == 0)
723 			leinit(ifp->if_unit);
724 		break;
725 
726 	default:
727 		error = EINVAL;
728 	}
729 	splx(s);
730 	return (error);
731 }
732 
733 leerror(unit, stat)
734 	int unit;
735 	int stat;
736 {
737 	if (!ledebug)
738 		return;
739 
740 	/*
741 	 * Not all transceivers implement heartbeat
742 	 * so we only log CERR once.
743 	 */
744 	if ((stat & LE_CERR) && le_softc[unit].sc_cerr)
745 		return;
746 	log(LOG_WARNING,
747 	    "le%d: error: stat=%b\n", unit,
748 	    stat,
749 	    "\20\20ERR\17BABL\16CERR\15MISS\14MERR\13RINT\12TINT\11IDON\10INTR\07INEA\06RXON\05TXON\04TDMD\03STOP\02STRT\01INIT");
750 }
751 
752 lererror(unit, msg)
753 	int unit;
754 	char *msg;
755 {
756 	register struct le_softc *le = &le_softc[unit];
757 	register struct lermd *rmd;
758 	int len;
759 
760 	if (!ledebug)
761 		return;
762 
763 	rmd = &le->sc_r2->ler2_rmd[le->sc_rmd];
764 	len = rmd->rmd3;
765 	log(LOG_WARNING,
766 	    "le%d: ierror(%s): from %s: buf=%d, len=%d, rmd1=%b\n",
767 	    unit, msg,
768 	    len > 11 ? ether_sprintf(&le->sc_r2->ler2_rbuf[le->sc_rmd][6]) : "unknown",
769 	    le->sc_rmd, len,
770 	    rmd->rmd1,
771 	    "\20\20OWN\17ERR\16FRAM\15OFLO\14CRC\13RBUF\12STP\11ENP");
772 }
773 
774 lexerror(unit)
775 	int unit;
776 {
777 	register struct le_softc *le = &le_softc[unit];
778 	register struct letmd *tmd;
779 	int len;
780 
781 	if (!ledebug)
782 		return;
783 
784 	tmd = le->sc_r2->ler2_tmd;
785 	len = -tmd->tmd2;
786 	log(LOG_WARNING,
787 	    "le%d: oerror: to %s: buf=%d, len=%d, tmd1=%b, tmd3=%b\n",
788 	    unit,
789 	    len > 5 ? ether_sprintf(&le->sc_r2->ler2_tbuf[0][0]) : "unknown",
790 	    0, len,
791 	    tmd->tmd1,
792 	    "\20\20OWN\17ERR\16RES\15MORE\14ONE\13DEF\12STP\11ENP",
793 	    tmd->tmd3,
794 	    "\20\20BUFF\17UFLO\16RES\15LCOL\14LCAR\13RTRY");
795 }
796 #endif
797