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am7990.c revision 1.64
      1 /*	$NetBSD: am7990.c,v 1.64 2001/11/13 13:14:34 lukem 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. All advertising materials mentioning features or use of this software
     56  *    must display the following acknowledgement:
     57  *	This product includes software developed by the University of
     58  *	California, Berkeley and its contributors.
     59  * 4. Neither the name of the University nor the names of its contributors
     60  *    may be used to endorse or promote products derived from this software
     61  *    without specific prior written permission.
     62  *
     63  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     64  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     65  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     66  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     67  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     68  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     69  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     70  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     71  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     72  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     73  * SUCH DAMAGE.
     74  *
     75  *	@(#)if_le.c	8.2 (Berkeley) 11/16/93
     76  */
     77 
     78 #include <sys/cdefs.h>
     79 __KERNEL_RCSID(0, "$NetBSD: am7990.c,v 1.64 2001/11/13 13:14:34 lukem Exp $");
     80 
     81 #include "bpfilter.h"
     82 #include "rnd.h"
     83 
     84 #include <sys/param.h>
     85 #include <sys/systm.h>
     86 #include <sys/mbuf.h>
     87 #include <sys/syslog.h>
     88 #include <sys/socket.h>
     89 #include <sys/device.h>
     90 #include <sys/malloc.h>
     91 #include <sys/ioctl.h>
     92 #include <sys/errno.h>
     93 #if NRND > 0
     94 #include <sys/rnd.h>
     95 #endif
     96 
     97 #include <net/if.h>
     98 #include <net/if_dl.h>
     99 #include <net/if_ether.h>
    100 #include <net/if_media.h>
    101 
    102 #if NBPFILTER > 0
    103 #include <net/bpf.h>
    104 #include <net/bpfdesc.h>
    105 #endif
    106 
    107 #include <dev/ic/lancereg.h>
    108 #include <dev/ic/lancevar.h>
    109 #include <dev/ic/am7990reg.h>
    110 #include <dev/ic/am7990var.h>
    111 
    112 void am7990_meminit __P((struct lance_softc *));
    113 void am7990_start __P((struct ifnet *));
    114 
    115 #if defined(_KERNEL_OPT)
    116 #include "opt_ddb.h"
    117 #endif
    118 
    119 #ifdef DDB
    120 #define	integrate
    121 #define hide
    122 #else
    123 #define	integrate	static __inline
    124 #define hide		static
    125 #endif
    126 
    127 integrate void am7990_rint __P((struct lance_softc *));
    128 integrate void am7990_tint __P((struct lance_softc *));
    129 
    130 #ifdef LEDEBUG
    131 void am7990_recv_print __P((struct lance_softc *, int));
    132 void am7990_xmit_print __P((struct lance_softc *, int));
    133 #endif
    134 
    135 #define	ifp	(&sc->sc_ethercom.ec_if)
    136 
    137 void
    138 am7990_config(sc)
    139 	struct am7990_softc *sc;
    140 {
    141 	int mem, i;
    142 
    143 	sc->lsc.sc_meminit = am7990_meminit;
    144 	sc->lsc.sc_start = am7990_start;
    145 
    146 	lance_config(&sc->lsc);
    147 
    148 	mem = 0;
    149 	sc->lsc.sc_initaddr = mem;
    150 	mem += sizeof(struct leinit);
    151 	sc->lsc.sc_rmdaddr = mem;
    152 	mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
    153 	sc->lsc.sc_tmdaddr = mem;
    154 	mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
    155 	for (i = 0; i < sc->lsc.sc_nrbuf; i++, mem += LEBLEN)
    156 		sc->lsc.sc_rbufaddr[i] = mem;
    157 	for (i = 0; i < sc->lsc.sc_ntbuf; i++, mem += LEBLEN)
    158 		sc->lsc.sc_tbufaddr[i] = mem;
    159 #ifdef notyet
    160 	if (mem > ...)
    161 		panic(...);
    162 #endif
    163 }
    164 
    165 /*
    166  * Set up the initialization block and the descriptor rings.
    167  */
    168 void
    169 am7990_meminit(sc)
    170 	struct lance_softc *sc;
    171 {
    172 	u_long a;
    173 	int bix;
    174 	struct leinit init;
    175 	struct lermd rmd;
    176 	struct letmd tmd;
    177 	u_int8_t *myaddr;
    178 
    179 #if NBPFILTER > 0
    180 	if (ifp->if_flags & IFF_PROMISC)
    181 		init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
    182 	else
    183 #endif
    184 		init.init_mode = LE_MODE_NORMAL;
    185 	if (sc->sc_initmodemedia == 1)
    186 		init.init_mode |= LE_MODE_PSEL0;
    187 
    188 	/*
    189 	 * Update our private copy of the Ethernet address.
    190 	 * We NEED the copy so we can ensure its alignment!
    191 	 */
    192 	memcpy(sc->sc_enaddr, LLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
    193 	myaddr = sc->sc_enaddr;
    194 
    195 	init.init_padr[0] = (myaddr[1] << 8) | myaddr[0];
    196 	init.init_padr[1] = (myaddr[3] << 8) | myaddr[2];
    197 	init.init_padr[2] = (myaddr[5] << 8) | myaddr[4];
    198 	lance_setladrf(&sc->sc_ethercom, init.init_ladrf);
    199 
    200 	sc->sc_last_rd = 0;
    201 	sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
    202 
    203 	a = sc->sc_addr + LE_RMDADDR(sc, 0);
    204 	init.init_rdra = a;
    205 	init.init_rlen = (a >> 16) | ((ffs(sc->sc_nrbuf) - 1) << 13);
    206 
    207 	a = sc->sc_addr + LE_TMDADDR(sc, 0);
    208 	init.init_tdra = a;
    209 	init.init_tlen = (a >> 16) | ((ffs(sc->sc_ntbuf) - 1) << 13);
    210 
    211 	(*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
    212 
    213 	/*
    214 	 * Set up receive ring descriptors.
    215 	 */
    216 	for (bix = 0; bix < sc->sc_nrbuf; bix++) {
    217 		a = sc->sc_addr + LE_RBUFADDR(sc, bix);
    218 		rmd.rmd0 = a;
    219 		rmd.rmd1_hadr = a >> 16;
    220 		rmd.rmd1_bits = LE_R1_OWN;
    221 		rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
    222 		rmd.rmd3 = 0;
    223 		(*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
    224 		    sizeof(rmd));
    225 	}
    226 
    227 	/*
    228 	 * Set up transmit ring descriptors.
    229 	 */
    230 	for (bix = 0; bix < sc->sc_ntbuf; bix++) {
    231 		a = sc->sc_addr + LE_TBUFADDR(sc, bix);
    232 		tmd.tmd0 = a;
    233 		tmd.tmd1_hadr = a >> 16;
    234 		tmd.tmd1_bits = 0;
    235 		tmd.tmd2 = 0 | LE_XMD2_ONES;
    236 		tmd.tmd3 = 0;
    237 		(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    238 		    sizeof(tmd));
    239 	}
    240 }
    241 
    242 integrate void
    243 am7990_rint(sc)
    244 	struct lance_softc *sc;
    245 {
    246 	int bix;
    247 	int rp;
    248 	struct lermd rmd;
    249 
    250 	bix = sc->sc_last_rd;
    251 
    252 	/* Process all buffers with valid data. */
    253 	for (;;) {
    254 		rp = LE_RMDADDR(sc, bix);
    255 		(*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
    256 
    257 		if (rmd.rmd1_bits & LE_R1_OWN)
    258 			break;
    259 
    260 		if (rmd.rmd1_bits & LE_R1_ERR) {
    261 			if (rmd.rmd1_bits & LE_R1_ENP) {
    262 #ifdef LEDEBUG
    263 				if ((rmd.rmd1_bits & LE_R1_OFLO) == 0) {
    264 					if (rmd.rmd1_bits & LE_R1_FRAM)
    265 						printf("%s: framing error\n",
    266 						    sc->sc_dev.dv_xname);
    267 					if (rmd.rmd1_bits & LE_R1_CRC)
    268 						printf("%s: crc mismatch\n",
    269 						    sc->sc_dev.dv_xname);
    270 				}
    271 #endif
    272 			} else {
    273 				if (rmd.rmd1_bits & LE_R1_OFLO)
    274 					printf("%s: overflow\n",
    275 					    sc->sc_dev.dv_xname);
    276 			}
    277 			if (rmd.rmd1_bits & LE_R1_BUFF)
    278 				printf("%s: receive buffer error\n",
    279 				    sc->sc_dev.dv_xname);
    280 			ifp->if_ierrors++;
    281 		} else if ((rmd.rmd1_bits & (LE_R1_STP | LE_R1_ENP)) !=
    282 		    (LE_R1_STP | LE_R1_ENP)) {
    283 			printf("%s: dropping chained buffer\n",
    284 			    sc->sc_dev.dv_xname);
    285 			ifp->if_ierrors++;
    286 		} else {
    287 #ifdef LEDEBUG
    288 			if (sc->sc_debug > 1)
    289 				am7990_recv_print(sc, sc->sc_last_rd);
    290 #endif
    291 			lance_read(sc, LE_RBUFADDR(sc, bix),
    292 				   (int)rmd.rmd3 - 4);
    293 		}
    294 
    295 		rmd.rmd1_bits = LE_R1_OWN;
    296 		rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
    297 		rmd.rmd3 = 0;
    298 		(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
    299 
    300 #ifdef LEDEBUG
    301 		if (sc->sc_debug)
    302 			printf("sc->sc_last_rd = %x, rmd: "
    303 			       "ladr %04x, hadr %02x, flags %02x, "
    304 			       "bcnt %04x, mcnt %04x\n",
    305 				sc->sc_last_rd,
    306 				rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits,
    307 				rmd.rmd2, rmd.rmd3);
    308 #endif
    309 
    310 		if (++bix == sc->sc_nrbuf)
    311 			bix = 0;
    312 	}
    313 
    314 	sc->sc_last_rd = bix;
    315 }
    316 
    317 integrate void
    318 am7990_tint(sc)
    319 	struct lance_softc *sc;
    320 {
    321 	int bix;
    322 	struct letmd tmd;
    323 
    324 	bix = sc->sc_first_td;
    325 
    326 	for (;;) {
    327 		if (sc->sc_no_td <= 0)
    328 			break;
    329 
    330 		(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    331 		    sizeof(tmd));
    332 
    333 #ifdef LEDEBUG
    334 		if (sc->sc_debug)
    335 			printf("trans tmd: "
    336 			    "ladr %04x, hadr %02x, flags %02x, "
    337 			    "bcnt %04x, mcnt %04x\n",
    338 			    tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits,
    339 			    tmd.tmd2, tmd.tmd3);
    340 #endif
    341 
    342 		if (tmd.tmd1_bits & LE_T1_OWN)
    343 			break;
    344 
    345 		ifp->if_flags &= ~IFF_OACTIVE;
    346 
    347 		if (tmd.tmd1_bits & LE_T1_ERR) {
    348 			if (tmd.tmd3 & LE_T3_BUFF)
    349 				printf("%s: transmit buffer error\n",
    350 				    sc->sc_dev.dv_xname);
    351 			else if (tmd.tmd3 & LE_T3_UFLO)
    352 				printf("%s: underflow\n", sc->sc_dev.dv_xname);
    353 			if (tmd.tmd3 & (LE_T3_BUFF | LE_T3_UFLO)) {
    354 				lance_reset(sc);
    355 				return;
    356 			}
    357 			if (tmd.tmd3 & LE_T3_LCAR) {
    358 				sc->sc_havecarrier = 0;
    359 				if (sc->sc_nocarrier)
    360 					(*sc->sc_nocarrier)(sc);
    361 				else
    362 					printf("%s: lost carrier\n",
    363 					    sc->sc_dev.dv_xname);
    364 			}
    365 			if (tmd.tmd3 & LE_T3_LCOL)
    366 				ifp->if_collisions++;
    367 			if (tmd.tmd3 & LE_T3_RTRY) {
    368 #ifdef LEDEBUG
    369 				printf("%s: excessive collisions, tdr %d\n",
    370 				    sc->sc_dev.dv_xname,
    371 				    tmd.tmd3 & LE_T3_TDR_MASK);
    372 #endif
    373 				ifp->if_collisions += 16;
    374 			}
    375 			ifp->if_oerrors++;
    376 		} else {
    377 			if (tmd.tmd1_bits & LE_T1_ONE)
    378 				ifp->if_collisions++;
    379 			else if (tmd.tmd1_bits & LE_T1_MORE)
    380 				/* Real number is unknown. */
    381 				ifp->if_collisions += 2;
    382 			ifp->if_opackets++;
    383 		}
    384 
    385 		if (++bix == sc->sc_ntbuf)
    386 			bix = 0;
    387 
    388 		--sc->sc_no_td;
    389 	}
    390 
    391 	sc->sc_first_td = bix;
    392 
    393 	am7990_start(ifp);
    394 
    395 	if (sc->sc_no_td == 0)
    396 		ifp->if_timer = 0;
    397 }
    398 
    399 /*
    400  * Controller interrupt.
    401  */
    402 int
    403 am7990_intr(arg)
    404 	void *arg;
    405 {
    406 	struct lance_softc *sc = arg;
    407 	u_int16_t isr;
    408 
    409 	isr = (*sc->sc_rdcsr)(sc, LE_CSR0) | sc->sc_saved_csr0;
    410 	sc->sc_saved_csr0 = 0;
    411 #if defined(LEDEBUG) && LEDEBUG > 1
    412 	if (sc->sc_debug)
    413 		printf("%s: am7990_intr entering with isr=%04x\n",
    414 		    sc->sc_dev.dv_xname, isr);
    415 #endif
    416 	if ((isr & LE_C0_INTR) == 0)
    417 		return (0);
    418 
    419 #ifdef __vax__
    420 	/*
    421 	 * DEC needs this write order to the registers, don't know
    422 	 * the results on other arch's.  Ragge 991029
    423 	 */
    424 	isr &= ~LE_C0_INEA;
    425 	(*sc->sc_wrcsr)(sc, LE_CSR0, isr);
    426 	(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA);
    427 #else
    428 	(*sc->sc_wrcsr)(sc, LE_CSR0,
    429 	    isr & (LE_C0_INEA | LE_C0_BABL | LE_C0_MISS | LE_C0_MERR |
    430 		   LE_C0_RINT | LE_C0_TINT | LE_C0_IDON));
    431 #endif
    432 	if (isr & LE_C0_ERR) {
    433 		if (isr & LE_C0_BABL) {
    434 #ifdef LEDEBUG
    435 			printf("%s: babble\n", sc->sc_dev.dv_xname);
    436 #endif
    437 			ifp->if_oerrors++;
    438 		}
    439 #if 0
    440 		if (isr & LE_C0_CERR) {
    441 			printf("%s: collision error\n", sc->sc_dev.dv_xname);
    442 			ifp->if_collisions++;
    443 		}
    444 #endif
    445 		if (isr & LE_C0_MISS) {
    446 #ifdef LEDEBUG
    447 			printf("%s: missed packet\n", sc->sc_dev.dv_xname);
    448 #endif
    449 			ifp->if_ierrors++;
    450 		}
    451 		if (isr & LE_C0_MERR) {
    452 			printf("%s: memory error\n", sc->sc_dev.dv_xname);
    453 			lance_reset(sc);
    454 			return (1);
    455 		}
    456 	}
    457 
    458 	if ((isr & LE_C0_RXON) == 0) {
    459 		printf("%s: receiver disabled\n", sc->sc_dev.dv_xname);
    460 		ifp->if_ierrors++;
    461 		lance_reset(sc);
    462 		return (1);
    463 	}
    464 	if ((isr & LE_C0_TXON) == 0) {
    465 		printf("%s: transmitter disabled\n", sc->sc_dev.dv_xname);
    466 		ifp->if_oerrors++;
    467 		lance_reset(sc);
    468 		return (1);
    469 	}
    470 
    471 	/*
    472 	 * Pretend we have carrier; if we don't this will be cleared
    473 	 * shortly.
    474 	 */
    475 	sc->sc_havecarrier = 1;
    476 
    477 	if (isr & LE_C0_RINT)
    478 		am7990_rint(sc);
    479 	if (isr & LE_C0_TINT)
    480 		am7990_tint(sc);
    481 
    482 #if NRND > 0
    483 	rnd_add_uint32(&sc->rnd_source, isr);
    484 #endif
    485 
    486 	return (1);
    487 }
    488 
    489 #undef ifp
    490 
    491 /*
    492  * Setup output on interface.
    493  * Get another datagram to send off of the interface queue, and map it to the
    494  * interface before starting the output.
    495  * Called only at splnet or interrupt level.
    496  */
    497 void
    498 am7990_start(ifp)
    499 	struct ifnet *ifp;
    500 {
    501 	struct lance_softc *sc = ifp->if_softc;
    502 	int bix;
    503 	struct mbuf *m;
    504 	struct letmd tmd;
    505 	int rp;
    506 	int len;
    507 
    508 	if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
    509 		return;
    510 
    511 	bix = sc->sc_last_td;
    512 
    513 	for (;;) {
    514 		rp = LE_TMDADDR(sc, bix);
    515 		(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
    516 
    517 		if (tmd.tmd1_bits & LE_T1_OWN) {
    518 			ifp->if_flags |= IFF_OACTIVE;
    519 			printf("missing buffer, no_td = %d, last_td = %d\n",
    520 			    sc->sc_no_td, sc->sc_last_td);
    521 		}
    522 
    523 		IFQ_DEQUEUE(&ifp->if_snd, m);
    524 		if (m == 0)
    525 			break;
    526 
    527 #if NBPFILTER > 0
    528 		/*
    529 		 * If BPF is listening on this interface, let it see the packet
    530 		 * before we commit it to the wire.
    531 		 */
    532 		if (ifp->if_bpf)
    533 			bpf_mtap(ifp->if_bpf, m);
    534 #endif
    535 
    536 		/*
    537 		 * Copy the mbuf chain into the transmit buffer.
    538 		 */
    539 		len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
    540 
    541 #ifdef LEDEBUG
    542 		if (len > ETHERMTU + sizeof(struct ether_header))
    543 			printf("packet length %d\n", len);
    544 #endif
    545 
    546 		ifp->if_timer = 5;
    547 
    548 		/*
    549 		 * Init transmit registers, and set transmit start flag.
    550 		 */
    551 		tmd.tmd1_bits = LE_T1_OWN | LE_T1_STP | LE_T1_ENP;
    552 		tmd.tmd2 = -len | LE_XMD2_ONES;
    553 		tmd.tmd3 = 0;
    554 
    555 		(*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
    556 
    557 #ifdef LEDEBUG
    558 		if (sc->sc_debug > 1)
    559 			am7990_xmit_print(sc, sc->sc_last_td);
    560 #endif
    561 
    562 		(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
    563 
    564 		if (++bix == sc->sc_ntbuf)
    565 			bix = 0;
    566 
    567 		if (++sc->sc_no_td == sc->sc_ntbuf) {
    568 			ifp->if_flags |= IFF_OACTIVE;
    569 			break;
    570 		}
    571 
    572 	}
    573 
    574 	sc->sc_last_td = bix;
    575 }
    576 
    577 #ifdef LEDEBUG
    578 void
    579 am7990_recv_print(sc, no)
    580 	struct lance_softc *sc;
    581 	int no;
    582 {
    583 	struct lermd rmd;
    584 	u_int16_t len;
    585 	struct ether_header eh;
    586 
    587 	(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
    588 	len = rmd.rmd3;
    589 	printf("%s: receive buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
    590 	    len);
    591 	printf("%s: status %04x\n", sc->sc_dev.dv_xname,
    592 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    593 	printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
    594 	    sc->sc_dev.dv_xname,
    595 	    rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3);
    596 	if (len >= sizeof(eh)) {
    597 		(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
    598 		printf("%s: dst %s", sc->sc_dev.dv_xname,
    599 			ether_sprintf(eh.ether_dhost));
    600 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    601 			ntohs(eh.ether_type));
    602 	}
    603 }
    604 
    605 void
    606 am7990_xmit_print(sc, no)
    607 	struct lance_softc *sc;
    608 	int no;
    609 {
    610 	struct letmd tmd;
    611 	u_int16_t len;
    612 	struct ether_header eh;
    613 
    614 	(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
    615 	len = -tmd.tmd2;
    616 	printf("%s: transmit buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
    617 	    len);
    618 	printf("%s: status %04x\n", sc->sc_dev.dv_xname,
    619 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    620 	printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
    621 	    sc->sc_dev.dv_xname,
    622 	    tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits, tmd.tmd2, tmd.tmd3);
    623 	if (len >= sizeof(eh)) {
    624 		(*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
    625 		printf("%s: dst %s", sc->sc_dev.dv_xname,
    626 			ether_sprintf(eh.ether_dhost));
    627 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    628 		    ntohs(eh.ether_type));
    629 	}
    630 }
    631 #endif /* LEDEBUG */
    632