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am7990.c revision 1.65
      1 /*	$NetBSD: am7990.c,v 1.65 2003/08/07 16:30:58 agc Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
      9  * Simulation Facility, NASA Ames Research Center.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the NetBSD
     22  *	Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 /*-
     41  * Copyright (c) 1992, 1993
     42  *	The Regents of the University of California.  All rights reserved.
     43  *
     44  * This code is derived from software contributed to Berkeley by
     45  * Ralph Campbell and Rick Macklem.
     46  *
     47  * Redistribution and use in source and binary forms, with or without
     48  * modification, are permitted provided that the following conditions
     49  * are met:
     50  * 1. Redistributions of source code must retain the above copyright
     51  *    notice, this list of conditions and the following disclaimer.
     52  * 2. Redistributions in binary form must reproduce the above copyright
     53  *    notice, this list of conditions and the following disclaimer in the
     54  *    documentation and/or other materials provided with the distribution.
     55  * 3. Neither the name of the University nor the names of its contributors
     56  *    may be used to endorse or promote products derived from this software
     57  *    without specific prior written permission.
     58  *
     59  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     69  * SUCH DAMAGE.
     70  *
     71  *	@(#)if_le.c	8.2 (Berkeley) 11/16/93
     72  */
     73 
     74 #include <sys/cdefs.h>
     75 __KERNEL_RCSID(0, "$NetBSD: am7990.c,v 1.65 2003/08/07 16:30:58 agc Exp $");
     76 
     77 #include "bpfilter.h"
     78 #include "rnd.h"
     79 
     80 #include <sys/param.h>
     81 #include <sys/systm.h>
     82 #include <sys/mbuf.h>
     83 #include <sys/syslog.h>
     84 #include <sys/socket.h>
     85 #include <sys/device.h>
     86 #include <sys/malloc.h>
     87 #include <sys/ioctl.h>
     88 #include <sys/errno.h>
     89 #if NRND > 0
     90 #include <sys/rnd.h>
     91 #endif
     92 
     93 #include <net/if.h>
     94 #include <net/if_dl.h>
     95 #include <net/if_ether.h>
     96 #include <net/if_media.h>
     97 
     98 #if NBPFILTER > 0
     99 #include <net/bpf.h>
    100 #include <net/bpfdesc.h>
    101 #endif
    102 
    103 #include <dev/ic/lancereg.h>
    104 #include <dev/ic/lancevar.h>
    105 #include <dev/ic/am7990reg.h>
    106 #include <dev/ic/am7990var.h>
    107 
    108 void am7990_meminit __P((struct lance_softc *));
    109 void am7990_start __P((struct ifnet *));
    110 
    111 #if defined(_KERNEL_OPT)
    112 #include "opt_ddb.h"
    113 #endif
    114 
    115 #ifdef DDB
    116 #define	integrate
    117 #define hide
    118 #else
    119 #define	integrate	static __inline
    120 #define hide		static
    121 #endif
    122 
    123 integrate void am7990_rint __P((struct lance_softc *));
    124 integrate void am7990_tint __P((struct lance_softc *));
    125 
    126 #ifdef LEDEBUG
    127 void am7990_recv_print __P((struct lance_softc *, int));
    128 void am7990_xmit_print __P((struct lance_softc *, int));
    129 #endif
    130 
    131 #define	ifp	(&sc->sc_ethercom.ec_if)
    132 
    133 void
    134 am7990_config(sc)
    135 	struct am7990_softc *sc;
    136 {
    137 	int mem, i;
    138 
    139 	sc->lsc.sc_meminit = am7990_meminit;
    140 	sc->lsc.sc_start = am7990_start;
    141 
    142 	lance_config(&sc->lsc);
    143 
    144 	mem = 0;
    145 	sc->lsc.sc_initaddr = mem;
    146 	mem += sizeof(struct leinit);
    147 	sc->lsc.sc_rmdaddr = mem;
    148 	mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
    149 	sc->lsc.sc_tmdaddr = mem;
    150 	mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
    151 	for (i = 0; i < sc->lsc.sc_nrbuf; i++, mem += LEBLEN)
    152 		sc->lsc.sc_rbufaddr[i] = mem;
    153 	for (i = 0; i < sc->lsc.sc_ntbuf; i++, mem += LEBLEN)
    154 		sc->lsc.sc_tbufaddr[i] = mem;
    155 #ifdef notyet
    156 	if (mem > ...)
    157 		panic(...);
    158 #endif
    159 }
    160 
    161 /*
    162  * Set up the initialization block and the descriptor rings.
    163  */
    164 void
    165 am7990_meminit(sc)
    166 	struct lance_softc *sc;
    167 {
    168 	u_long a;
    169 	int bix;
    170 	struct leinit init;
    171 	struct lermd rmd;
    172 	struct letmd tmd;
    173 	u_int8_t *myaddr;
    174 
    175 #if NBPFILTER > 0
    176 	if (ifp->if_flags & IFF_PROMISC)
    177 		init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
    178 	else
    179 #endif
    180 		init.init_mode = LE_MODE_NORMAL;
    181 	if (sc->sc_initmodemedia == 1)
    182 		init.init_mode |= LE_MODE_PSEL0;
    183 
    184 	/*
    185 	 * Update our private copy of the Ethernet address.
    186 	 * We NEED the copy so we can ensure its alignment!
    187 	 */
    188 	memcpy(sc->sc_enaddr, LLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
    189 	myaddr = sc->sc_enaddr;
    190 
    191 	init.init_padr[0] = (myaddr[1] << 8) | myaddr[0];
    192 	init.init_padr[1] = (myaddr[3] << 8) | myaddr[2];
    193 	init.init_padr[2] = (myaddr[5] << 8) | myaddr[4];
    194 	lance_setladrf(&sc->sc_ethercom, init.init_ladrf);
    195 
    196 	sc->sc_last_rd = 0;
    197 	sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
    198 
    199 	a = sc->sc_addr + LE_RMDADDR(sc, 0);
    200 	init.init_rdra = a;
    201 	init.init_rlen = (a >> 16) | ((ffs(sc->sc_nrbuf) - 1) << 13);
    202 
    203 	a = sc->sc_addr + LE_TMDADDR(sc, 0);
    204 	init.init_tdra = a;
    205 	init.init_tlen = (a >> 16) | ((ffs(sc->sc_ntbuf) - 1) << 13);
    206 
    207 	(*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
    208 
    209 	/*
    210 	 * Set up receive ring descriptors.
    211 	 */
    212 	for (bix = 0; bix < sc->sc_nrbuf; bix++) {
    213 		a = sc->sc_addr + LE_RBUFADDR(sc, bix);
    214 		rmd.rmd0 = a;
    215 		rmd.rmd1_hadr = a >> 16;
    216 		rmd.rmd1_bits = LE_R1_OWN;
    217 		rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
    218 		rmd.rmd3 = 0;
    219 		(*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
    220 		    sizeof(rmd));
    221 	}
    222 
    223 	/*
    224 	 * Set up transmit ring descriptors.
    225 	 */
    226 	for (bix = 0; bix < sc->sc_ntbuf; bix++) {
    227 		a = sc->sc_addr + LE_TBUFADDR(sc, bix);
    228 		tmd.tmd0 = a;
    229 		tmd.tmd1_hadr = a >> 16;
    230 		tmd.tmd1_bits = 0;
    231 		tmd.tmd2 = 0 | LE_XMD2_ONES;
    232 		tmd.tmd3 = 0;
    233 		(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    234 		    sizeof(tmd));
    235 	}
    236 }
    237 
    238 integrate void
    239 am7990_rint(sc)
    240 	struct lance_softc *sc;
    241 {
    242 	int bix;
    243 	int rp;
    244 	struct lermd rmd;
    245 
    246 	bix = sc->sc_last_rd;
    247 
    248 	/* Process all buffers with valid data. */
    249 	for (;;) {
    250 		rp = LE_RMDADDR(sc, bix);
    251 		(*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
    252 
    253 		if (rmd.rmd1_bits & LE_R1_OWN)
    254 			break;
    255 
    256 		if (rmd.rmd1_bits & LE_R1_ERR) {
    257 			if (rmd.rmd1_bits & LE_R1_ENP) {
    258 #ifdef LEDEBUG
    259 				if ((rmd.rmd1_bits & LE_R1_OFLO) == 0) {
    260 					if (rmd.rmd1_bits & LE_R1_FRAM)
    261 						printf("%s: framing error\n",
    262 						    sc->sc_dev.dv_xname);
    263 					if (rmd.rmd1_bits & LE_R1_CRC)
    264 						printf("%s: crc mismatch\n",
    265 						    sc->sc_dev.dv_xname);
    266 				}
    267 #endif
    268 			} else {
    269 				if (rmd.rmd1_bits & LE_R1_OFLO)
    270 					printf("%s: overflow\n",
    271 					    sc->sc_dev.dv_xname);
    272 			}
    273 			if (rmd.rmd1_bits & LE_R1_BUFF)
    274 				printf("%s: receive buffer error\n",
    275 				    sc->sc_dev.dv_xname);
    276 			ifp->if_ierrors++;
    277 		} else if ((rmd.rmd1_bits & (LE_R1_STP | LE_R1_ENP)) !=
    278 		    (LE_R1_STP | LE_R1_ENP)) {
    279 			printf("%s: dropping chained buffer\n",
    280 			    sc->sc_dev.dv_xname);
    281 			ifp->if_ierrors++;
    282 		} else {
    283 #ifdef LEDEBUG
    284 			if (sc->sc_debug > 1)
    285 				am7990_recv_print(sc, sc->sc_last_rd);
    286 #endif
    287 			lance_read(sc, LE_RBUFADDR(sc, bix),
    288 				   (int)rmd.rmd3 - 4);
    289 		}
    290 
    291 		rmd.rmd1_bits = LE_R1_OWN;
    292 		rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
    293 		rmd.rmd3 = 0;
    294 		(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
    295 
    296 #ifdef LEDEBUG
    297 		if (sc->sc_debug)
    298 			printf("sc->sc_last_rd = %x, rmd: "
    299 			       "ladr %04x, hadr %02x, flags %02x, "
    300 			       "bcnt %04x, mcnt %04x\n",
    301 				sc->sc_last_rd,
    302 				rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits,
    303 				rmd.rmd2, rmd.rmd3);
    304 #endif
    305 
    306 		if (++bix == sc->sc_nrbuf)
    307 			bix = 0;
    308 	}
    309 
    310 	sc->sc_last_rd = bix;
    311 }
    312 
    313 integrate void
    314 am7990_tint(sc)
    315 	struct lance_softc *sc;
    316 {
    317 	int bix;
    318 	struct letmd tmd;
    319 
    320 	bix = sc->sc_first_td;
    321 
    322 	for (;;) {
    323 		if (sc->sc_no_td <= 0)
    324 			break;
    325 
    326 		(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    327 		    sizeof(tmd));
    328 
    329 #ifdef LEDEBUG
    330 		if (sc->sc_debug)
    331 			printf("trans tmd: "
    332 			    "ladr %04x, hadr %02x, flags %02x, "
    333 			    "bcnt %04x, mcnt %04x\n",
    334 			    tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits,
    335 			    tmd.tmd2, tmd.tmd3);
    336 #endif
    337 
    338 		if (tmd.tmd1_bits & LE_T1_OWN)
    339 			break;
    340 
    341 		ifp->if_flags &= ~IFF_OACTIVE;
    342 
    343 		if (tmd.tmd1_bits & LE_T1_ERR) {
    344 			if (tmd.tmd3 & LE_T3_BUFF)
    345 				printf("%s: transmit buffer error\n",
    346 				    sc->sc_dev.dv_xname);
    347 			else if (tmd.tmd3 & LE_T3_UFLO)
    348 				printf("%s: underflow\n", sc->sc_dev.dv_xname);
    349 			if (tmd.tmd3 & (LE_T3_BUFF | LE_T3_UFLO)) {
    350 				lance_reset(sc);
    351 				return;
    352 			}
    353 			if (tmd.tmd3 & LE_T3_LCAR) {
    354 				sc->sc_havecarrier = 0;
    355 				if (sc->sc_nocarrier)
    356 					(*sc->sc_nocarrier)(sc);
    357 				else
    358 					printf("%s: lost carrier\n",
    359 					    sc->sc_dev.dv_xname);
    360 			}
    361 			if (tmd.tmd3 & LE_T3_LCOL)
    362 				ifp->if_collisions++;
    363 			if (tmd.tmd3 & LE_T3_RTRY) {
    364 #ifdef LEDEBUG
    365 				printf("%s: excessive collisions, tdr %d\n",
    366 				    sc->sc_dev.dv_xname,
    367 				    tmd.tmd3 & LE_T3_TDR_MASK);
    368 #endif
    369 				ifp->if_collisions += 16;
    370 			}
    371 			ifp->if_oerrors++;
    372 		} else {
    373 			if (tmd.tmd1_bits & LE_T1_ONE)
    374 				ifp->if_collisions++;
    375 			else if (tmd.tmd1_bits & LE_T1_MORE)
    376 				/* Real number is unknown. */
    377 				ifp->if_collisions += 2;
    378 			ifp->if_opackets++;
    379 		}
    380 
    381 		if (++bix == sc->sc_ntbuf)
    382 			bix = 0;
    383 
    384 		--sc->sc_no_td;
    385 	}
    386 
    387 	sc->sc_first_td = bix;
    388 
    389 	am7990_start(ifp);
    390 
    391 	if (sc->sc_no_td == 0)
    392 		ifp->if_timer = 0;
    393 }
    394 
    395 /*
    396  * Controller interrupt.
    397  */
    398 int
    399 am7990_intr(arg)
    400 	void *arg;
    401 {
    402 	struct lance_softc *sc = arg;
    403 	u_int16_t isr;
    404 
    405 	isr = (*sc->sc_rdcsr)(sc, LE_CSR0) | sc->sc_saved_csr0;
    406 	sc->sc_saved_csr0 = 0;
    407 #if defined(LEDEBUG) && LEDEBUG > 1
    408 	if (sc->sc_debug)
    409 		printf("%s: am7990_intr entering with isr=%04x\n",
    410 		    sc->sc_dev.dv_xname, isr);
    411 #endif
    412 	if ((isr & LE_C0_INTR) == 0)
    413 		return (0);
    414 
    415 #ifdef __vax__
    416 	/*
    417 	 * DEC needs this write order to the registers, don't know
    418 	 * the results on other arch's.  Ragge 991029
    419 	 */
    420 	isr &= ~LE_C0_INEA;
    421 	(*sc->sc_wrcsr)(sc, LE_CSR0, isr);
    422 	(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA);
    423 #else
    424 	(*sc->sc_wrcsr)(sc, LE_CSR0,
    425 	    isr & (LE_C0_INEA | LE_C0_BABL | LE_C0_MISS | LE_C0_MERR |
    426 		   LE_C0_RINT | LE_C0_TINT | LE_C0_IDON));
    427 #endif
    428 	if (isr & LE_C0_ERR) {
    429 		if (isr & LE_C0_BABL) {
    430 #ifdef LEDEBUG
    431 			printf("%s: babble\n", sc->sc_dev.dv_xname);
    432 #endif
    433 			ifp->if_oerrors++;
    434 		}
    435 #if 0
    436 		if (isr & LE_C0_CERR) {
    437 			printf("%s: collision error\n", sc->sc_dev.dv_xname);
    438 			ifp->if_collisions++;
    439 		}
    440 #endif
    441 		if (isr & LE_C0_MISS) {
    442 #ifdef LEDEBUG
    443 			printf("%s: missed packet\n", sc->sc_dev.dv_xname);
    444 #endif
    445 			ifp->if_ierrors++;
    446 		}
    447 		if (isr & LE_C0_MERR) {
    448 			printf("%s: memory error\n", sc->sc_dev.dv_xname);
    449 			lance_reset(sc);
    450 			return (1);
    451 		}
    452 	}
    453 
    454 	if ((isr & LE_C0_RXON) == 0) {
    455 		printf("%s: receiver disabled\n", sc->sc_dev.dv_xname);
    456 		ifp->if_ierrors++;
    457 		lance_reset(sc);
    458 		return (1);
    459 	}
    460 	if ((isr & LE_C0_TXON) == 0) {
    461 		printf("%s: transmitter disabled\n", sc->sc_dev.dv_xname);
    462 		ifp->if_oerrors++;
    463 		lance_reset(sc);
    464 		return (1);
    465 	}
    466 
    467 	/*
    468 	 * Pretend we have carrier; if we don't this will be cleared
    469 	 * shortly.
    470 	 */
    471 	sc->sc_havecarrier = 1;
    472 
    473 	if (isr & LE_C0_RINT)
    474 		am7990_rint(sc);
    475 	if (isr & LE_C0_TINT)
    476 		am7990_tint(sc);
    477 
    478 #if NRND > 0
    479 	rnd_add_uint32(&sc->rnd_source, isr);
    480 #endif
    481 
    482 	return (1);
    483 }
    484 
    485 #undef ifp
    486 
    487 /*
    488  * Setup output on interface.
    489  * Get another datagram to send off of the interface queue, and map it to the
    490  * interface before starting the output.
    491  * Called only at splnet or interrupt level.
    492  */
    493 void
    494 am7990_start(ifp)
    495 	struct ifnet *ifp;
    496 {
    497 	struct lance_softc *sc = ifp->if_softc;
    498 	int bix;
    499 	struct mbuf *m;
    500 	struct letmd tmd;
    501 	int rp;
    502 	int len;
    503 
    504 	if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
    505 		return;
    506 
    507 	bix = sc->sc_last_td;
    508 
    509 	for (;;) {
    510 		rp = LE_TMDADDR(sc, bix);
    511 		(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
    512 
    513 		if (tmd.tmd1_bits & LE_T1_OWN) {
    514 			ifp->if_flags |= IFF_OACTIVE;
    515 			printf("missing buffer, no_td = %d, last_td = %d\n",
    516 			    sc->sc_no_td, sc->sc_last_td);
    517 		}
    518 
    519 		IFQ_DEQUEUE(&ifp->if_snd, m);
    520 		if (m == 0)
    521 			break;
    522 
    523 #if NBPFILTER > 0
    524 		/*
    525 		 * If BPF is listening on this interface, let it see the packet
    526 		 * before we commit it to the wire.
    527 		 */
    528 		if (ifp->if_bpf)
    529 			bpf_mtap(ifp->if_bpf, m);
    530 #endif
    531 
    532 		/*
    533 		 * Copy the mbuf chain into the transmit buffer.
    534 		 */
    535 		len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
    536 
    537 #ifdef LEDEBUG
    538 		if (len > ETHERMTU + sizeof(struct ether_header))
    539 			printf("packet length %d\n", len);
    540 #endif
    541 
    542 		ifp->if_timer = 5;
    543 
    544 		/*
    545 		 * Init transmit registers, and set transmit start flag.
    546 		 */
    547 		tmd.tmd1_bits = LE_T1_OWN | LE_T1_STP | LE_T1_ENP;
    548 		tmd.tmd2 = -len | LE_XMD2_ONES;
    549 		tmd.tmd3 = 0;
    550 
    551 		(*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
    552 
    553 #ifdef LEDEBUG
    554 		if (sc->sc_debug > 1)
    555 			am7990_xmit_print(sc, sc->sc_last_td);
    556 #endif
    557 
    558 		(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
    559 
    560 		if (++bix == sc->sc_ntbuf)
    561 			bix = 0;
    562 
    563 		if (++sc->sc_no_td == sc->sc_ntbuf) {
    564 			ifp->if_flags |= IFF_OACTIVE;
    565 			break;
    566 		}
    567 
    568 	}
    569 
    570 	sc->sc_last_td = bix;
    571 }
    572 
    573 #ifdef LEDEBUG
    574 void
    575 am7990_recv_print(sc, no)
    576 	struct lance_softc *sc;
    577 	int no;
    578 {
    579 	struct lermd rmd;
    580 	u_int16_t len;
    581 	struct ether_header eh;
    582 
    583 	(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
    584 	len = rmd.rmd3;
    585 	printf("%s: receive buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
    586 	    len);
    587 	printf("%s: status %04x\n", sc->sc_dev.dv_xname,
    588 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    589 	printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
    590 	    sc->sc_dev.dv_xname,
    591 	    rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3);
    592 	if (len >= sizeof(eh)) {
    593 		(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
    594 		printf("%s: dst %s", sc->sc_dev.dv_xname,
    595 			ether_sprintf(eh.ether_dhost));
    596 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    597 			ntohs(eh.ether_type));
    598 	}
    599 }
    600 
    601 void
    602 am7990_xmit_print(sc, no)
    603 	struct lance_softc *sc;
    604 	int no;
    605 {
    606 	struct letmd tmd;
    607 	u_int16_t len;
    608 	struct ether_header eh;
    609 
    610 	(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
    611 	len = -tmd.tmd2;
    612 	printf("%s: transmit buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
    613 	    len);
    614 	printf("%s: status %04x\n", sc->sc_dev.dv_xname,
    615 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    616 	printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
    617 	    sc->sc_dev.dv_xname,
    618 	    tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits, tmd.tmd2, tmd.tmd3);
    619 	if (len >= sizeof(eh)) {
    620 		(*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
    621 		printf("%s: dst %s", sc->sc_dev.dv_xname,
    622 			ether_sprintf(eh.ether_dhost));
    623 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    624 		    ntohs(eh.ether_type));
    625 	}
    626 }
    627 #endif /* LEDEBUG */
    628