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1.1 nbrk 1: /* $OpenBSD: am7990.c,v 1.41 2006/04/20 20:31:12 miod Exp $ */
2: /* $NetBSD: am7990.c,v 1.22 1996/10/13 01:37:19 christos Exp $ */
3:
4: /*-
5: * Copyright (c) 1995 Charles M. Hannum. All rights reserved.
6: * Copyright (c) 1992, 1993
7: * The Regents of the University of California. All rights reserved.
8: *
9: * This code is derived from software contributed to Berkeley by
10: * Ralph Campbell and Rick Macklem.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: *
36: * @(#)if_le.c 8.2 (Berkeley) 11/16/93
37: */
38:
39: #include "bpfilter.h"
40:
41: #include <sys/param.h>
42: #include <sys/systm.h>
43: #include <sys/mbuf.h>
44: #include <sys/syslog.h>
45: #include <sys/socket.h>
46: #include <sys/device.h>
47: #include <sys/malloc.h>
48: #include <sys/ioctl.h>
49: #include <sys/errno.h>
50:
51: #include <net/if.h>
52: #include <net/if_media.h>
53:
54: #ifdef INET
55: #include <netinet/in.h>
56: #include <netinet/if_ether.h>
57: #include <netinet/in_systm.h>
58: #include <netinet/in_var.h>
59: #include <netinet/ip.h>
60: #endif
61:
62: #if NBPFILTER > 0
63: #include <net/bpf.h>
64: #endif
65:
66: #include <dev/ic/am7990reg.h>
67: #include <dev/ic/am7990var.h>
68:
69: #ifdef LEDEBUG
70: void am7990_recv_print(struct am7990_softc *, int);
71: void am7990_xmit_print(struct am7990_softc *, int);
72: #endif
73:
74: integrate void am7990_rint(struct am7990_softc *);
75: integrate void am7990_tint(struct am7990_softc *);
76:
77: integrate int am7990_put(struct am7990_softc *, int, struct mbuf *);
78: integrate struct mbuf *am7990_get(struct am7990_softc *, int, int);
79: integrate void am7990_read(struct am7990_softc *, int, int);
80:
81: hide void am7990_shutdown(void *);
82:
83: #define ifp (&sc->sc_arpcom.ac_if)
84:
85: #if 0 /* XXX what do we do about this?! --thorpej */
86: static inline u_int16_t ether_cmp(void *, void *);
87:
88: /*
89: * Compare two Ether/802 addresses for equality, inlined and
90: * unrolled for speed. I'd love to have an inline assembler
91: * version of this... XXX: Who wanted that? mycroft?
92: * I wrote one, but the following is just as efficient.
93: * This expands to 10 short m68k instructions! -gwr
94: * Note: use this like bcmp()
95: */
96: static inline u_short
97: ether_cmp(one, two)
98: void *one, *two;
99: {
100: register u_int16_t *a = (u_short *) one;
101: register u_int16_t *b = (u_short *) two;
102: register u_int16_t diff;
103:
104: diff = *a++ - *b++;
105: diff |= *a++ - *b++;
106: diff |= *a++ - *b++;
107:
108: return (diff);
109: }
110:
111: #define ETHER_CMP ether_cmp
112: #endif /* XXX */
113:
114: #ifndef ETHER_CMP
115: #define ETHER_CMP(a, b) bcmp((a), (b), ETHER_ADDR_LEN)
116: #endif
117:
118: /*
119: * am7990 configuration driver. Attachments are provided by
120: * machine-dependent driver front-ends.
121: */
122: struct cfdriver le_cd = {
123: NULL, "le", DV_IFNET
124: };
125:
126: void
127: am7990_config(sc)
128: struct am7990_softc *sc;
129: {
130: int mem;
131:
132: /* Make sure the chip is stopped. */
133: am7990_stop(sc);
134:
135: /* Initialize ifnet structure. */
136: bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ);
137: ifp->if_softc = sc;
138: ifp->if_start = am7990_start;
139: ifp->if_ioctl = am7990_ioctl;
140: ifp->if_watchdog = am7990_watchdog;
141: ifp->if_flags =
142: IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST;
143: #ifdef LANCE_REVC_BUG
144: ifp->if_flags &= ~IFF_MULTICAST;
145: #endif
146: ifp->if_baudrate = IF_Mbps(10);
147: IFQ_SET_READY(&ifp->if_snd);
148:
149: ifp->if_capabilities = IFCAP_VLAN_MTU;
150:
151: /* Attach the interface. */
152: if_attach(ifp);
153: ether_ifattach(ifp);
154:
155: if (sc->sc_memsize > 262144)
156: sc->sc_memsize = 262144;
157:
158: switch (sc->sc_memsize) {
159: case 8192:
160: sc->sc_nrbuf = 4;
161: sc->sc_ntbuf = 1;
162: break;
163: case 16384:
164: sc->sc_nrbuf = 8;
165: sc->sc_ntbuf = 2;
166: break;
167: case 32768:
168: sc->sc_nrbuf = 16;
169: sc->sc_ntbuf = 4;
170: break;
171: case 65536:
172: sc->sc_nrbuf = 32;
173: sc->sc_ntbuf = 8;
174: break;
175: case 131072:
176: sc->sc_nrbuf = 64;
177: sc->sc_ntbuf = 16;
178: break;
179: case 262144:
180: sc->sc_nrbuf = 128;
181: sc->sc_ntbuf = 32;
182: break;
183: default:
184: panic("am7990_config: weird memory size %lu", sc->sc_memsize);
185: }
186:
187: printf(": address %s\n", ether_sprintf(sc->sc_arpcom.ac_enaddr));
188: printf("%s: %d receive buffers, %d transmit buffers\n",
189: sc->sc_dev.dv_xname, sc->sc_nrbuf, sc->sc_ntbuf);
190:
191: sc->sc_sh = shutdownhook_establish(am7990_shutdown, sc);
192: if (sc->sc_sh == NULL)
193: panic("am7990_config: can't establish shutdownhook");
194:
195: mem = 0;
196: sc->sc_initaddr = mem;
197: mem += sizeof(struct leinit);
198: sc->sc_rmdaddr = mem;
199: mem += sizeof(struct lermd) * sc->sc_nrbuf;
200: sc->sc_tmdaddr = mem;
201: mem += sizeof(struct letmd) * sc->sc_ntbuf;
202: sc->sc_rbufaddr = mem;
203: mem += ETHER_MAX_DIX_LEN * sc->sc_nrbuf;
204: sc->sc_tbufaddr = mem;
205: mem += ETHER_MAX_DIX_LEN * sc->sc_ntbuf;
206: #ifdef notyet
207: if (mem > ...)
208: panic(...);
209: #endif
210: }
211:
212: void
213: am7990_reset(sc)
214: struct am7990_softc *sc;
215: {
216: int s;
217:
218: s = splnet();
219: am7990_init(sc);
220: splx(s);
221: }
222:
223: /*
224: * Set up the initialization block and the descriptor rings.
225: */
226: void
227: am7990_meminit(sc)
228: register struct am7990_softc *sc;
229: {
230: u_long a;
231: int bix;
232: struct leinit init;
233: struct lermd rmd;
234: struct letmd tmd;
235:
236: #if NBPFILTER > 0
237: if (ifp->if_flags & IFF_PROMISC)
238: init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
239: else
240: #endif
241: init.init_mode = LE_MODE_NORMAL;
242: init.init_padr[0] =
243: (sc->sc_arpcom.ac_enaddr[1] << 8) | sc->sc_arpcom.ac_enaddr[0];
244: init.init_padr[1] =
245: (sc->sc_arpcom.ac_enaddr[3] << 8) | sc->sc_arpcom.ac_enaddr[2];
246: init.init_padr[2] =
247: (sc->sc_arpcom.ac_enaddr[5] << 8) | sc->sc_arpcom.ac_enaddr[4];
248: am7990_setladrf(&sc->sc_arpcom, init.init_ladrf);
249:
250: sc->sc_last_rd = 0;
251: sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
252:
253: a = sc->sc_addr + LE_RMDADDR(sc, 0);
254: init.init_rdra = a;
255: init.init_rlen = (a >> 16) | ((ffs(sc->sc_nrbuf) - 1) << 13);
256:
257: a = sc->sc_addr + LE_TMDADDR(sc, 0);
258: init.init_tdra = a;
259: init.init_tlen = (a >> 16) | ((ffs(sc->sc_ntbuf) - 1) << 13);
260:
261: (*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
262:
263: /*
264: * Set up receive ring descriptors.
265: */
266: for (bix = 0; bix < sc->sc_nrbuf; bix++) {
267: a = sc->sc_addr + LE_RBUFADDR(sc, bix);
268: rmd.rmd0 = a;
269: rmd.rmd1_hadr = a >> 16;
270: rmd.rmd1_bits = LE_R1_OWN;
271: rmd.rmd2 = -ETHER_MAX_DIX_LEN | LE_XMD2_ONES;
272: rmd.rmd3 = 0;
273: (*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
274: sizeof(rmd));
275: }
276:
277: /*
278: * Set up transmit ring descriptors.
279: */
280: for (bix = 0; bix < sc->sc_ntbuf; bix++) {
281: a = sc->sc_addr + LE_TBUFADDR(sc, bix);
282: tmd.tmd0 = a;
283: tmd.tmd1_hadr = a >> 16;
284: tmd.tmd1_bits = 0;
285: tmd.tmd2 = 0 | LE_XMD2_ONES;
286: tmd.tmd3 = 0;
287: (*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
288: sizeof(tmd));
289: }
290: }
291:
292: void
293: am7990_stop(sc)
294: struct am7990_softc *sc;
295: {
296:
297: (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP);
298: }
299:
300: /*
301: * Initialization of interface; set up initialization block
302: * and transmit/receive descriptor rings.
303: */
304: void
305: am7990_init(sc)
306: register struct am7990_softc *sc;
307: {
308: register int timo;
309: u_long a;
310:
311: (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP);
312: DELAY(100);
313:
314: /* Newer LANCE chips have a reset register */
315: if (sc->sc_hwreset)
316: (*sc->sc_hwreset)(sc);
317:
318: /* Set the correct byte swapping mode, etc. */
319: (*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3);
320:
321: /* Set up LANCE init block. */
322: am7990_meminit(sc);
323:
324: /* Give LANCE the physical address of its init block. */
325: a = sc->sc_addr + LE_INITADDR(sc);
326: (*sc->sc_wrcsr)(sc, LE_CSR1, a);
327: (*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16);
328:
329: /* Try to initialize the LANCE. */
330: DELAY(100);
331: (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT);
332:
333: /* Wait for initialization to finish. */
334: for (timo = 100000; timo; timo--)
335: if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON)
336: break;
337:
338: if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) {
339: /* Start the LANCE. */
340: (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT |
341: LE_C0_IDON);
342: ifp->if_flags |= IFF_RUNNING;
343: ifp->if_flags &= ~IFF_OACTIVE;
344: ifp->if_timer = 0;
345: am7990_start(ifp);
346: } else
347: printf("%s: controller failed to initialize\n", sc->sc_dev.dv_xname);
348: if (sc->sc_hwinit)
349: (*sc->sc_hwinit)(sc);
350: }
351:
352: /*
353: * Routine to copy from mbuf chain to transmit buffer in
354: * network buffer memory.
355: */
356: integrate int
357: am7990_put(sc, boff, m)
358: struct am7990_softc *sc;
359: int boff;
360: register struct mbuf *m;
361: {
362: register struct mbuf *n;
363: register int len, tlen = 0;
364:
365: for (; m; m = n) {
366: len = m->m_len;
367: if (len == 0) {
368: MFREE(m, n);
369: continue;
370: }
371: (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len);
372: boff += len;
373: tlen += len;
374: MFREE(m, n);
375: }
376: if (tlen < LEMINSIZE) {
377: (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen);
378: tlen = LEMINSIZE;
379: }
380: return (tlen);
381: }
382:
383: /*
384: * Pull data off an interface.
385: * Len is length of data, with local net header stripped.
386: * We copy the data into mbufs. When full cluster sized units are present
387: * we copy into clusters.
388: */
389: integrate struct mbuf *
390: am7990_get(sc, boff, totlen)
391: struct am7990_softc *sc;
392: int boff, totlen;
393: {
394: register struct mbuf *m;
395: struct mbuf *top, **mp;
396: int len, pad;
397:
398: MGETHDR(m, M_DONTWAIT, MT_DATA);
399: if (m == 0)
400: return (0);
401: m->m_pkthdr.rcvif = ifp;
402: m->m_pkthdr.len = totlen;
403: pad = ALIGN(sizeof(struct ether_header)) - sizeof(struct ether_header);
404: m->m_data += pad;
405: len = MHLEN - pad;
406: top = 0;
407: mp = ⊤
408:
409: while (totlen > 0) {
410: if (top) {
411: MGET(m, M_DONTWAIT, MT_DATA);
412: if (m == 0) {
413: m_freem(top);
414: return 0;
415: }
416: len = MLEN;
417: }
418: if (totlen >= MINCLSIZE) {
419: MCLGET(m, M_DONTWAIT);
420: if (m->m_flags & M_EXT) {
421: len = MCLBYTES;
422: if (!top) {
423: m->m_data += pad;
424: len -= pad;
425: }
426: }
427: }
428: m->m_len = len = min(totlen, len);
429: (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len);
430: boff += len;
431: totlen -= len;
432: *mp = m;
433: mp = &m->m_next;
434: }
435:
436: return (top);
437: }
438:
439: /*
440: * Pass a packet to the higher levels.
441: */
442: integrate void
443: am7990_read(sc, boff, len)
444: register struct am7990_softc *sc;
445: int boff, len;
446: {
447: struct mbuf *m;
448: #ifdef LANCE_REVC_BUG
449: struct ether_header *eh;
450: #endif
451:
452: if (len <= sizeof(struct ether_header) ||
453: len > ETHERMTU + ETHER_VLAN_ENCAP_LEN + sizeof(struct ether_header)) {
454: #ifdef LEDEBUG
455: printf("%s: invalid packet size %d; dropping\n",
456: sc->sc_dev.dv_xname, len);
457: #endif
458: ifp->if_ierrors++;
459: return;
460: }
461:
462: /* Pull packet off interface. */
463: m = am7990_get(sc, boff, len);
464: if (m == 0) {
465: ifp->if_ierrors++;
466: return;
467: }
468:
469: ifp->if_ipackets++;
470:
471: #if NBPFILTER > 0
472: /*
473: * Check if there's a BPF listener on this interface.
474: * If so, hand off the raw packet to BPF.
475: */
476: if (ifp->if_bpf)
477: bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_IN);
478: #endif
479:
480: #ifdef LANCE_REVC_BUG
481: /*
482: * The old LANCE (Rev. C) chips have a bug which causes
483: * garbage to be inserted in front of the received packet.
484: * The work-around is to ignore packets with an invalid
485: * destination address (garbage will usually not match).
486: * Of course, this precludes multicast support...
487: */
488: eh = mtod(m, struct ether_header *);
489: if (ETHER_CMP(eh->ether_dhost, sc->sc_arpcom.ac_enaddr) &&
490: ETHER_CMP(eh->ether_dhost, etherbroadcastaddr)) {
491: m_freem(m);
492: return;
493: }
494: #endif
495:
496: /* Pass the packet up. */
497: ether_input_mbuf(ifp, m);
498: }
499:
500: integrate void
501: am7990_rint(sc)
502: struct am7990_softc *sc;
503: {
504: register int bix;
505: int rp;
506: struct lermd rmd;
507:
508: bix = sc->sc_last_rd;
509:
510: /* Process all buffers with valid data. */
511: for (;;) {
512: rp = LE_RMDADDR(sc, bix);
513: (*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
514:
515: if (rmd.rmd1_bits & LE_R1_OWN)
516: break;
517:
518: if (rmd.rmd1_bits & LE_R1_ERR) {
519: if (rmd.rmd1_bits & LE_R1_ENP) {
520: #ifdef LEDEBUG
521: if ((rmd.rmd1_bits & LE_R1_OFLO) == 0) {
522: if (rmd.rmd1_bits & LE_R1_FRAM)
523: printf("%s: framing error\n",
524: sc->sc_dev.dv_xname);
525: if (rmd.rmd1_bits & LE_R1_CRC)
526: printf("%s: crc mismatch\n",
527: sc->sc_dev.dv_xname);
528: }
529: #endif
530: } else {
531: if (rmd.rmd1_bits & LE_R1_OFLO)
532: printf("%s: overflow\n",
533: sc->sc_dev.dv_xname);
534: }
535: if (rmd.rmd1_bits & LE_R1_BUFF)
536: printf("%s: receive buffer error\n",
537: sc->sc_dev.dv_xname);
538: ifp->if_ierrors++;
539: } else if ((rmd.rmd1_bits & (LE_R1_STP | LE_R1_ENP)) !=
540: (LE_R1_STP | LE_R1_ENP)) {
541: printf("%s: dropping chained buffer\n",
542: sc->sc_dev.dv_xname);
543: ifp->if_ierrors++;
544: } else {
545: #ifdef LEDEBUG1
546: if (sc->sc_debug)
547: am7990_recv_print(sc, sc->sc_last_rd);
548: #endif
549: am7990_read(sc, LE_RBUFADDR(sc, bix),
550: (int)rmd.rmd3 - 4);
551: }
552:
553: rmd.rmd1_bits = LE_R1_OWN;
554: rmd.rmd2 = -ETHER_MAX_DIX_LEN | LE_XMD2_ONES;
555: rmd.rmd3 = 0;
556: (*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
557:
558: #ifdef LEDEBUG1
559: if (sc->sc_debug)
560: printf("sc->sc_last_rd = %x, rmd: "
561: "ladr %04x, hadr %02x, flags %02x, "
562: "bcnt %04x, mcnt %04x\n",
563: sc->sc_last_rd,
564: rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits,
565: rmd.rmd2, rmd.rmd3);
566: #endif
567:
568: if (++bix == sc->sc_nrbuf)
569: bix = 0;
570: }
571:
572: sc->sc_last_rd = bix;
573: }
574:
575: integrate void
576: am7990_tint(sc)
577: register struct am7990_softc *sc;
578: {
579: register int bix;
580: struct letmd tmd;
581:
582: bix = sc->sc_first_td;
583:
584: for (;;) {
585: if (sc->sc_no_td <= 0)
586: break;
587:
588: (*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
589: sizeof(tmd));
590:
591: #ifdef LEDEBUG
592: if (sc->sc_debug)
593: printf("trans tmd: "
594: "ladr %04x, hadr %02x, flags %02x, "
595: "bcnt %04x, mcnt %04x\n",
596: tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits,
597: tmd.tmd2, tmd.tmd3);
598: #endif
599:
600: if (tmd.tmd1_bits & LE_T1_OWN)
601: break;
602:
603: ifp->if_flags &= ~IFF_OACTIVE;
604:
605: if (tmd.tmd1_bits & LE_T1_ERR) {
606: if (tmd.tmd3 & LE_T3_BUFF)
607: printf("%s: transmit buffer error\n",
608: sc->sc_dev.dv_xname);
609: else if (tmd.tmd3 & LE_T3_UFLO)
610: printf("%s: underflow\n", sc->sc_dev.dv_xname);
611: if (tmd.tmd3 & (LE_T3_BUFF | LE_T3_UFLO)) {
612: am7990_reset(sc);
613: return;
614: }
615: if (tmd.tmd3 & LE_T3_LCAR) {
616: if (sc->sc_nocarrier)
617: (*sc->sc_nocarrier)(sc);
618: }
619: if (tmd.tmd3 & LE_T3_LCOL)
620: ifp->if_collisions++;
621: if (tmd.tmd3 & LE_T3_RTRY) {
622: printf("%s: excessive collisions, tdr %d\n",
623: sc->sc_dev.dv_xname,
624: tmd.tmd3 & LE_T3_TDR_MASK);
625: ifp->if_collisions += 16;
626: }
627: ifp->if_oerrors++;
628: } else {
629: if (tmd.tmd1_bits & LE_T1_ONE)
630: ifp->if_collisions++;
631: else if (tmd.tmd1_bits & LE_T1_MORE)
632: /* Real number is unknown. */
633: ifp->if_collisions += 2;
634: ifp->if_opackets++;
635: }
636:
637: if (++bix == sc->sc_ntbuf)
638: bix = 0;
639:
640: --sc->sc_no_td;
641: }
642:
643: sc->sc_first_td = bix;
644:
645: am7990_start(ifp);
646:
647: if (sc->sc_no_td == 0)
648: ifp->if_timer = 0;
649: }
650:
651: /*
652: * Controller interrupt.
653: */
654: int
655: am7990_intr(arg)
656: register void *arg;
657: {
658: register struct am7990_softc *sc = arg;
659: register u_int16_t isr;
660:
661: isr = (*sc->sc_rdcsr)(sc, LE_CSR0);
662: #ifdef LEDEBUG
663: if (sc->sc_debug){
664: printf("%s: am7990_intr entering with isr=%04x\n",
665: sc->sc_dev.dv_xname, isr);
666: printf(" isr: 0x%b\n", isr, LE_C0_BITS);
667: }
668: #endif
669: if ((isr & LE_C0_INTR) == 0)
670: return (0);
671:
672: /*
673: * After receiving an interrupt, we need to toggle the interrupt
674: * enable bit in order to keep receiving them (some chips works
675: * without this, some do not)
676: */
677: (*sc->sc_wrcsr)(sc, LE_CSR0, isr & ~LE_C0_INEA);
678: (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA);
679:
680: if (isr & LE_C0_ERR) {
681: if (isr & LE_C0_BABL) {
682: #ifdef LEDEBUG
683: printf("%s: babble\n", sc->sc_dev.dv_xname);
684: #endif
685: ifp->if_oerrors++;
686: }
687: #if 0
688: if (isr & LE_C0_CERR) {
689: printf("%s: collision error\n", sc->sc_dev.dv_xname);
690: ifp->if_collisions++;
691: }
692: #endif
693: if (isr & LE_C0_MISS) {
694: #ifdef LEDEBUG
695: printf("%s: missed packet\n", sc->sc_dev.dv_xname);
696: #endif
697: ifp->if_ierrors++;
698: }
699: if (isr & LE_C0_MERR) {
700: printf("%s: memory error\n", sc->sc_dev.dv_xname);
701: am7990_reset(sc);
702: return (1);
703: }
704: }
705:
706: if ((isr & LE_C0_RXON) == 0) {
707: printf("%s: receiver disabled\n", sc->sc_dev.dv_xname);
708: ifp->if_ierrors++;
709: am7990_reset(sc);
710: return (1);
711: }
712: if ((isr & LE_C0_TXON) == 0) {
713: printf("%s: transmitter disabled\n", sc->sc_dev.dv_xname);
714: ifp->if_oerrors++;
715: am7990_reset(sc);
716: return (1);
717: }
718:
719: if (isr & LE_C0_RINT)
720: am7990_rint(sc);
721: if (isr & LE_C0_TINT)
722: am7990_tint(sc);
723:
724: return (1);
725: }
726:
727: #undef ifp
728:
729: void
730: am7990_watchdog(ifp)
731: struct ifnet *ifp;
732: {
733: struct am7990_softc *sc = ifp->if_softc;
734:
735: log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname);
736: ++ifp->if_oerrors;
737:
738: am7990_reset(sc);
739: }
740:
741: /*
742: * Setup output on interface.
743: * Get another datagram to send off of the interface queue, and map it to the
744: * interface before starting the output.
745: * Called only at splnet or interrupt level.
746: */
747: void
748: am7990_start(ifp)
749: register struct ifnet *ifp;
750: {
751: register struct am7990_softc *sc = ifp->if_softc;
752: register int bix;
753: register struct mbuf *m;
754: struct letmd tmd;
755: int rp;
756: int len;
757:
758: if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
759: return;
760:
761: bix = sc->sc_last_td;
762:
763: for (;;) {
764: rp = LE_TMDADDR(sc, bix);
765: (*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
766:
767: if (tmd.tmd1_bits & LE_T1_OWN) {
768: ifp->if_flags |= IFF_OACTIVE;
769: printf("missing buffer, no_td = %d, last_td = %d\n",
770: sc->sc_no_td, sc->sc_last_td);
771: }
772:
773: IFQ_DEQUEUE(&ifp->if_snd, m);
774: if (m == 0)
775: break;
776:
777: #if NBPFILTER > 0
778: /*
779: * If BPF is listening on this interface, let it see the packet
780: * before we commit it to the wire.
781: */
782: if (ifp->if_bpf)
783: bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT);
784: #endif
785:
786: /*
787: * Copy the mbuf chain into the transmit buffer.
788: */
789: len = am7990_put(sc, LE_TBUFADDR(sc, bix), m);
790:
791: #ifdef LEDEBUG
792: if (len > ETHERMTU + sizeof(struct ether_header))
793: printf("packet length %d\n", len);
794: #endif
795:
796: ifp->if_timer = 5;
797:
798: /*
799: * Init transmit registers, and set transmit start flag.
800: */
801: tmd.tmd1_bits = LE_T1_OWN | LE_T1_STP | LE_T1_ENP;
802: tmd.tmd2 = -len | LE_XMD2_ONES;
803: tmd.tmd3 = 0;
804:
805: (*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
806:
807: #ifdef LEDEBUG
808: if (sc->sc_debug)
809: am7990_xmit_print(sc, sc->sc_last_td);
810: #endif
811:
812: (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
813:
814: if (++bix == sc->sc_ntbuf)
815: bix = 0;
816:
817: if (++sc->sc_no_td == sc->sc_ntbuf) {
818: #ifdef LEDEBUG
819: printf("\nequal!\n");
820: #endif
821: ifp->if_flags |= IFF_OACTIVE;
822: break;
823: }
824:
825: }
826:
827: sc->sc_last_td = bix;
828: }
829:
830: /*
831: * Process an ioctl request.
832: */
833: int
834: am7990_ioctl(ifp, cmd, data)
835: register struct ifnet *ifp;
836: u_long cmd;
837: caddr_t data;
838: {
839: register struct am7990_softc *sc = ifp->if_softc;
840: struct ifaddr *ifa = (struct ifaddr *)data;
841: struct ifreq *ifr = (struct ifreq *)data;
842: int s, error = 0;
843:
844: s = splnet();
845:
846: if ((error = ether_ioctl(ifp, &sc->sc_arpcom, cmd, data)) > 0) {
847: splx(s);
848: return error;
849: }
850:
851: switch (cmd) {
852:
853: case SIOCSIFADDR:
854: ifp->if_flags |= IFF_UP;
855:
856: switch (ifa->ifa_addr->sa_family) {
857: #ifdef INET
858: case AF_INET:
859: am7990_init(sc);
860: arp_ifinit(&sc->sc_arpcom, ifa);
861: break;
862: #endif
863: default:
864: am7990_init(sc);
865: break;
866: }
867: break;
868:
869: case SIOCSIFFLAGS:
870: if ((ifp->if_flags & IFF_UP) == 0 &&
871: (ifp->if_flags & IFF_RUNNING) != 0) {
872: /*
873: * If interface is marked down and it is running, then
874: * stop it.
875: */
876: am7990_stop(sc);
877: ifp->if_flags &= ~IFF_RUNNING;
878: } else if ((ifp->if_flags & IFF_UP) != 0 &&
879: (ifp->if_flags & IFF_RUNNING) == 0) {
880: /*
881: * If interface is marked up and it is stopped, then
882: * start it.
883: */
884: am7990_init(sc);
885: } else {
886: /*
887: * Reset the interface to pick up changes in any other
888: * flags that affect hardware registers.
889: */
890: /*am7990_stop(sc);*/
891: am7990_init(sc);
892: }
893: #ifdef LEDEBUG
894: if (ifp->if_flags & IFF_DEBUG)
895: sc->sc_debug = 1;
896: else
897: sc->sc_debug = 0;
898: #endif
899: break;
900:
901: case SIOCADDMULTI:
902: case SIOCDELMULTI:
903: error = (cmd == SIOCADDMULTI) ?
904: ether_addmulti(ifr, &sc->sc_arpcom) :
905: ether_delmulti(ifr, &sc->sc_arpcom);
906:
907: if (error == ENETRESET) {
908: /*
909: * Multicast list has changed; set the hardware filter
910: * accordingly.
911: */
912: if (ifp->if_flags & IFF_RUNNING)
913: am7990_reset(sc);
914: error = 0;
915: }
916: break;
917:
918: case SIOCGIFMEDIA:
919: case SIOCSIFMEDIA:
920: if (sc->sc_hasifmedia)
921: error = ifmedia_ioctl(ifp, ifr, &sc->sc_ifmedia, cmd);
922: else
923: error = EINVAL;
924: break;
925:
926: default:
927: error = EINVAL;
928: break;
929: }
930:
931: splx(s);
932: return (error);
933: }
934:
935: hide void
936: am7990_shutdown(arg)
937: void *arg;
938: {
939:
940: am7990_stop((struct am7990_softc *)arg);
941: }
942:
943: #ifdef LEDEBUG
944: void
945: am7990_recv_print(sc, no)
946: struct am7990_softc *sc;
947: int no;
948: {
949: struct lermd rmd;
950: u_int16_t len;
951: struct ether_header eh;
952:
953: (*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
954: len = rmd.rmd3;
955: printf("%s: receive buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
956: len);
957: printf("%s: status %04x\n", sc->sc_dev.dv_xname,
958: (*sc->sc_rdcsr)(sc, LE_CSR0));
959: printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
960: sc->sc_dev.dv_xname,
961: rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3);
962: if (len >= sizeof(eh)) {
963: (*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
964: printf("%s: dst %s", sc->sc_dev.dv_xname,
965: ether_sprintf(eh.ether_dhost));
966: printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
967: ntohs(eh.ether_type));
968: }
969: }
970:
971: void
972: am7990_xmit_print(sc, no)
973: struct am7990_softc *sc;
974: int no;
975: {
976: struct letmd tmd;
977: u_int16_t len;
978: struct ether_header eh;
979:
980: (*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
981: len = -tmd.tmd2;
982: printf("%s: transmit buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
983: len);
984: printf("%s: status %04x\n", sc->sc_dev.dv_xname,
985: (*sc->sc_rdcsr)(sc, LE_CSR0));
986: printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
987: sc->sc_dev.dv_xname,
988: tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits, tmd.tmd2, tmd.tmd3);
989: if (len >= sizeof(eh)) {
990: (*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
991: printf("%s: dst %s", sc->sc_dev.dv_xname,
992: ether_sprintf(eh.ether_dhost));
993: printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
994: ntohs(eh.ether_type));
995: }
996: }
997: #endif /* LEDEBUG */
998:
999: /*
1000: * Set up the logical address filter.
1001: */
1002: void
1003: am7990_setladrf(ac, af)
1004: struct arpcom *ac;
1005: u_int16_t *af;
1006: {
1007: struct ifnet *ifp = &ac->ac_if;
1008: struct ether_multi *enm;
1009: register u_int32_t crc;
1010: struct ether_multistep step;
1011:
1012: /*
1013: * Set up multicast address filter by passing all multicast addresses
1014: * through a crc generator, and then using the high order 6 bits as an
1015: * index into the 64 bit logical address filter. The high order bit
1016: * selects the word, while the rest of the bits select the bit within
1017: * the word.
1018: */
1019:
1020: if (ifp->if_flags & IFF_PROMISC)
1021: goto allmulti;
1022:
1023: af[0] = af[1] = af[2] = af[3] = 0x0000;
1024: ETHER_FIRST_MULTI(step, ac, enm);
1025: while (enm != NULL) {
1026: if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) {
1027: /*
1028: * We must listen to a range of multicast addresses.
1029: * For now, just accept all multicasts, rather than
1030: * trying to set only those filter bits needed to match
1031: * the range. (At this time, the only use of address
1032: * ranges is for IP multicast routing, for which the
1033: * range is big enough to require all bits set.)
1034: */
1035: goto allmulti;
1036: }
1037:
1038: crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN) >> 26;
1039:
1040: /* Set the corresponding bit in the filter. */
1041: af[crc >> 4] |= 1 << (crc & 0xf);
1042:
1043: ETHER_NEXT_MULTI(step, enm);
1044: }
1045: ifp->if_flags &= ~IFF_ALLMULTI;
1046: return;
1047:
1048: allmulti:
1049: ifp->if_flags |= IFF_ALLMULTI;
1050: af[0] = af[1] = af[2] = af[3] = 0xffff;
1051: }
1052:
1053:
1054: /*
1055: * Routines for accessing the transmit and receive buffers.
1056: * The various CPU and adapter configurations supported by this
1057: * driver require three different access methods for buffers
1058: * and descriptors:
1059: * (1) contig (contiguous data; no padding),
1060: * (2) gap2 (two bytes of data followed by two bytes of padding),
1061: * (3) gap16 (16 bytes of data followed by 16 bytes of padding).
1062: */
1063:
1064: /*
1065: * contig: contiguous data with no padding.
1066: *
1067: * Buffers may have any alignment.
1068: */
1069:
1070: void
1071: am7990_copytobuf_contig(sc, from, boff, len)
1072: struct am7990_softc *sc;
1073: void *from;
1074: int boff, len;
1075: {
1076: volatile caddr_t buf = sc->sc_mem;
1077:
1078: /*
1079: * Just call bcopy() to do the work.
1080: */
1081: bcopy(from, buf + boff, len);
1082: }
1083:
1084: void
1085: am7990_copyfrombuf_contig(sc, to, boff, len)
1086: struct am7990_softc *sc;
1087: void *to;
1088: int boff, len;
1089: {
1090: volatile caddr_t buf = sc->sc_mem;
1091:
1092: /*
1093: * Just call bcopy() to do the work.
1094: */
1095: bcopy(buf + boff, to, len);
1096: }
1097:
1098: void
1099: am7990_zerobuf_contig(sc, boff, len)
1100: struct am7990_softc *sc;
1101: int boff, len;
1102: {
1103: volatile caddr_t buf = sc->sc_mem;
1104:
1105: /*
1106: * Just let bzero() do the work
1107: */
1108: bzero(buf + boff, len);
1109: }
1110:
1111: #if 0
1112: /*
1113: * Examples only; duplicate these and tweak (if necessary) in
1114: * machine-specific front-ends.
1115: */
1116:
1117: /*
1118: * gap2: two bytes of data followed by two bytes of pad.
1119: *
1120: * Buffers must be 4-byte aligned. The code doesn't worry about
1121: * doing an extra byte.
1122: */
1123:
1124: void
1125: am7990_copytobuf_gap2(sc, fromv, boff, len)
1126: struct am7990_softc *sc;
1127: void *fromv;
1128: int boff;
1129: register int len;
1130: {
1131: volatile caddr_t buf = sc->sc_mem;
1132: register caddr_t from = fromv;
1133: register volatile u_int16_t *bptr;
1134:
1135: if (boff & 0x1) {
1136: /* handle unaligned first byte */
1137: bptr = ((volatile u_int16_t *)buf) + (boff - 1);
1138: *bptr = (*from++ << 8) | (*bptr & 0xff);
1139: bptr += 2;
1140: len--;
1141: } else
1142: bptr = ((volatile u_int16_t *)buf) + boff;
1143: while (len > 1) {
1144: *bptr = (from[1] << 8) | (from[0] & 0xff);
1145: bptr += 2;
1146: from += 2;
1147: len -= 2;
1148: }
1149: if (len == 1)
1150: *bptr = (u_int16_t)*from;
1151: }
1152:
1153: void
1154: am7990_copyfrombuf_gap2(sc, tov, boff, len)
1155: struct am7990_softc *sc;
1156: void *tov;
1157: int boff, len;
1158: {
1159: volatile caddr_t buf = sc->sc_mem;
1160: register caddr_t to = tov;
1161: register volatile u_int16_t *bptr;
1162: register u_int16_t tmp;
1163:
1164: if (boff & 0x1) {
1165: /* handle unaligned first byte */
1166: bptr = ((volatile u_int16_t *)buf) + (boff - 1);
1167: *to++ = (*bptr >> 8) & 0xff;
1168: bptr += 2;
1169: len--;
1170: } else
1171: bptr = ((volatile u_int16_t *)buf) + boff;
1172: while (len > 1) {
1173: tmp = *bptr;
1174: *to++ = tmp & 0xff;
1175: *to++ = (tmp >> 8) & 0xff;
1176: bptr += 2;
1177: len -= 2;
1178: }
1179: if (len == 1)
1180: *to = *bptr & 0xff;
1181: }
1182:
1183: void
1184: am7990_zerobuf_gap2(sc, boff, len)
1185: struct am7990_softc *sc;
1186: int boff, len;
1187: {
1188: volatile caddr_t buf = sc->sc_mem;
1189: register volatile u_int16_t *bptr;
1190:
1191: if ((unsigned)boff & 0x1) {
1192: bptr = ((volatile u_int16_t *)buf) + (boff - 1);
1193: *bptr &= 0xff;
1194: bptr += 2;
1195: len--;
1196: } else
1197: bptr = ((volatile u_int16_t *)buf) + boff;
1198: while (len > 0) {
1199: *bptr = 0;
1200: bptr += 2;
1201: len -= 2;
1202: }
1203: }
1204:
1205: /*
1206: * gap16: 16 bytes of data followed by 16 bytes of pad.
1207: *
1208: * Buffers must be 32-byte aligned.
1209: */
1210:
1211: void
1212: am7990_copytobuf_gap16(sc, fromv, boff, len)
1213: struct am7990_softc *sc;
1214: void *fromv;
1215: int boff;
1216: register int len;
1217: {
1218: volatile caddr_t buf = sc->sc_mem;
1219: register caddr_t from = fromv;
1220: register caddr_t bptr;
1221: register int xfer;
1222:
1223: bptr = buf + ((boff << 1) & ~0x1f);
1224: boff &= 0xf;
1225: xfer = min(len, 16 - boff);
1226: while (len > 0) {
1227: bcopy(from, bptr + boff, xfer);
1228: from += xfer;
1229: bptr += 32;
1230: boff = 0;
1231: len -= xfer;
1232: xfer = min(len, 16);
1233: }
1234: }
1235:
1236: void
1237: am7990_copyfrombuf_gap16(sc, tov, boff, len)
1238: struct am7990_softc *sc;
1239: void *tov;
1240: int boff, len;
1241: {
1242: volatile caddr_t buf = sc->sc_mem;
1243: register caddr_t to = tov;
1244: register caddr_t bptr;
1245: register int xfer;
1246:
1247: bptr = buf + ((boff << 1) & ~0x1f);
1248: boff &= 0xf;
1249: xfer = min(len, 16 - boff);
1250: while (len > 0) {
1251: bcopy(bptr + boff, to, xfer);
1252: to += xfer;
1253: bptr += 32;
1254: boff = 0;
1255: len -= xfer;
1256: xfer = min(len, 16);
1257: }
1258: }
1259:
1260: void
1261: am7990_zerobuf_gap16(sc, boff, len)
1262: struct am7990_softc *sc;
1263: int boff, len;
1264: {
1265: volatile caddr_t buf = sc->sc_mem;
1266: register caddr_t bptr;
1267: register int xfer;
1268:
1269: bptr = buf + ((boff << 1) & ~0x1f);
1270: boff &= 0xf;
1271: xfer = min(len, 16 - boff);
1272: while (len > 0) {
1273: bzero(bptr + boff, xfer);
1274: bptr += 32;
1275: boff = 0;
1276: len -= xfer;
1277: xfer = min(len, 16);
1278: }
1279: }
1280: #endif /* Example only */