1/* $NetBSD: smc90cx6.c,v 1.38 2001/07/07 15:57:53 thorpej Exp $ */
2
3#include <sys/cdefs.h>
|
4__FBSDID("$FreeBSD: head/sys/dev/cm/smc90cx6.c 257176 2013-10-26 17:58:36Z glebius $");
|
| 4__FBSDID("$FreeBSD: head/sys/dev/cm/smc90cx6.c 271849 2014-09-19 03:51:26Z glebius $"); |
5
6/*-
7 * Copyright (c) 1994, 1995, 1998 The NetBSD Foundation, Inc.
8 * All rights reserved.
9 *
10 * This code is derived from software contributed to The NetBSD Foundation
11 * by Ignatios Souvatzis.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 */
34
35/*
36 * Chip core driver for the SMC90c26 / SMC90c56 (and SMC90c66 in '56
37 * compatibility mode) boards
38 */
39
40/* #define CMSOFTCOPY */
41#define CMRETRANSMIT /**/
42/* #define CM_DEBUG */
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/sockio.h>
47#include <sys/mbuf.h>
48#include <sys/module.h>
49#include <sys/kernel.h>
50#include <sys/socket.h>
51#include <sys/syslog.h>
52#include <sys/bus.h>
53
54#include <machine/bus.h>
55#include <sys/rman.h>
56#include <machine/resource.h>
57
58#include <net/if.h>
59#include <net/if_var.h>
60#include <net/if_dl.h>
61#include <net/if_types.h>
62#include <net/if_arc.h>
63
64#include <dev/cm/smc90cx6reg.h>
65#include <dev/cm/smc90cx6var.h>
66
67MODULE_DEPEND(if_cm, arcnet, 1, 1, 1);
68
69/* these should be elsewhere */
70
71#define ARC_MIN_LEN 1
72#define ARC_MIN_FORBID_LEN 254
73#define ARC_MAX_FORBID_LEN 256
74#define ARC_MAX_LEN 508
75#define ARC_ADDR_LEN 1
76
77/* for watchdog timer. This should be more than enough. */
78#define ARCTIMEOUT (5*IFNET_SLOWHZ)
79
80devclass_t cm_devclass;
81
82/*
83 * This currently uses 2 bufs for tx, 2 for rx
84 *
85 * New rx protocol:
86 *
87 * rx has a fillcount variable. If fillcount > (NRXBUF-1),
88 * rx can be switched off from rx hard int.
89 * Else rx is restarted on the other receiver.
90 * rx soft int counts down. if it is == (NRXBUF-1), it restarts
91 * the receiver.
92 * To ensure packet ordering (we need that for 1201 later), we have a counter
93 * which is incremented modulo 256 on each receive and a per buffer
94 * variable, which is set to the counter on filling. The soft int can
95 * compare both values to determine the older packet.
96 *
97 * Transmit direction:
98 *
99 * cm_start checks tx_fillcount
100 * case 2: return
101 *
102 * else fill tx_act ^ 1 && inc tx_fillcount
103 *
104 * check tx_fillcount again.
105 * case 2: set IFF_DRV_OACTIVE to stop arc_output from filling us.
106 * case 1: start tx
107 *
108 * tint clears IFF_OACTIVE, decrements and checks tx_fillcount
109 * case 1: start tx on tx_act ^ 1, softcall cm_start
110 * case 0: softcall cm_start
111 *
112 * #define fill(i) get mbuf && copy mbuf to chip(i)
113 */
114
115void cm_init(void *);
116static void cm_init_locked(struct cm_softc *);
117static void cm_reset_locked(struct cm_softc *);
118void cm_start(struct ifnet *);
119void cm_start_locked(struct ifnet *);
120int cm_ioctl(struct ifnet *, unsigned long, caddr_t);
121void cm_watchdog(void *);
122void cm_srint_locked(void *vsc);
123static void cm_tint_locked(struct cm_softc *, int);
124void cm_reconwatch_locked(void *);
125
126/*
127 * Release all resources
128 */
129void
130cm_release_resources(dev)
131 device_t dev;
132{
133 struct cm_softc *sc = device_get_softc(dev);
134
135 if (sc->port_res != NULL) {
136 bus_release_resource(dev, SYS_RES_IOPORT,
137 0, sc->port_res);
138 sc->port_res = NULL;
139 }
140 if (sc->mem_res != NULL) {
141 bus_release_resource(dev, SYS_RES_MEMORY,
142 0, sc->mem_res);
143 sc->mem_res = NULL;
144 }
145 if (sc->irq_res != NULL) {
146 bus_release_resource(dev, SYS_RES_IRQ,
147 0, sc->irq_res);
148 sc->irq_res = NULL;
149 }
150}
151
152int
153cm_attach(dev)
154 device_t dev;
155{
156 struct cm_softc *sc = device_get_softc(dev);
157 struct ifnet *ifp;
158 u_int8_t linkaddress;
159
160 ifp = sc->sc_ifp = if_alloc(IFT_ARCNET);
161 if (ifp == NULL)
162 return (ENOSPC);
163
164 /*
165 * read the arcnet address from the board
166 */
167 GETREG(CMRESET);
168 do {
169 DELAY(200);
170 } while (!(GETREG(CMSTAT) & CM_POR));
171 linkaddress = GETMEM(CMMACOFF);
172
173 /* clear the int mask... */
174 sc->sc_intmask = 0;
175 PUTREG(CMSTAT, 0);
176
177 PUTREG(CMCMD, CM_CONF(CONF_LONG));
178 PUTREG(CMCMD, CM_CLR(CLR_POR|CLR_RECONFIG));
179 sc->sc_recontime = sc->sc_reconcount = 0;
180
181 /*
182 * set interface to stopped condition (reset)
183 */
184 cm_stop_locked(sc);
185
186 ifp->if_softc = sc;
187 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
188 ifp->if_output = arc_output;
189 ifp->if_start = cm_start;
190 ifp->if_ioctl = cm_ioctl;
191 ifp->if_init = cm_init;
192 /* XXX IFQ_SET_READY(&ifp->if_snd); */
193 ifp->if_snd.ifq_maxlen = ifqmaxlen;
194 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
195
196 arc_ifattach(ifp, linkaddress);
197
198#ifdef CMSOFTCOPY
199 sc->sc_rxcookie = softintr_establish(IPL_SOFTNET, cm_srint, sc);
200 sc->sc_txcookie = softintr_establish(IPL_SOFTNET,
201 (void (*)(void *))cm_start, ifp);
202#endif
203
204 callout_init_mtx(&sc->sc_recon_ch, &sc->sc_mtx, 0);
205 callout_init_mtx(&sc->sc_watchdog_timer, &sc->sc_mtx, 0);
206
207 if_printf(ifp, "link addr 0x%02x (%d)\n", linkaddress, linkaddress);
208 return 0;
209}
210
211/*
212 * Initialize device
213 *
214 */
215void
216cm_init(xsc)
217 void *xsc;
218{
219 struct cm_softc *sc = (struct cm_softc *)xsc;
220
221 CM_LOCK(sc);
222 cm_init_locked(sc);
223 CM_UNLOCK(sc);
224}
225
226static void
227cm_init_locked(struct cm_softc *sc)
228{
229 struct ifnet *ifp = sc->sc_ifp;
230
231 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
232 ifp->if_drv_flags |= IFF_DRV_RUNNING;
233 cm_reset_locked(sc);
234 }
235}
236
237/*
238 * Reset the interface...
239 *
240 * Assumes that it is called with sc_mtx held
241 */
242void
243cm_reset_locked(sc)
244 struct cm_softc *sc;
245{
246 struct ifnet *ifp;
247 int linkaddress;
248
249 ifp = sc->sc_ifp;
250
251#ifdef CM_DEBUG
252 if_printf(ifp, "reset\n");
253#endif
254 /* stop and restart hardware */
255
256 GETREG(CMRESET);
257 do {
258 DELAY(200);
259 } while (!(GETREG(CMSTAT) & CM_POR));
260
261 linkaddress = GETMEM(CMMACOFF);
262
263#if defined(CM_DEBUG) && (CM_DEBUG > 2)
264 if_printf(ifp, "reset: card reset, link addr = 0x%02x (%d)\n",
265 linkaddress, linkaddress);
266#endif
267
268 /* tell the routing level about the (possibly changed) link address */
269 arc_storelladdr(ifp, linkaddress);
270 arc_frag_init(ifp);
271
272 /* POR is NMI, but we need it below: */
273 sc->sc_intmask = CM_RECON|CM_POR;
274 PUTREG(CMSTAT, sc->sc_intmask);
275 PUTREG(CMCMD, CM_CONF(CONF_LONG));
276
277#ifdef CM_DEBUG
278 if_printf(ifp, "reset: chip configured, status=0x%02x\n",
279 GETREG(CMSTAT));
280#endif
281 PUTREG(CMCMD, CM_CLR(CLR_POR|CLR_RECONFIG));
282
283#ifdef CM_DEBUG
284 if_printf(ifp, "reset: bits cleared, status=0x%02x\n",
285 GETREG(CMSTAT));
286#endif
287
288 sc->sc_reconcount_excessive = ARC_EXCESSIVE_RECONS;
289
290 /* start receiver */
291
292 sc->sc_intmask |= CM_RI;
293 sc->sc_rx_fillcount = 0;
294 sc->sc_rx_act = 2;
295
296 PUTREG(CMCMD, CM_RXBC(2));
297 PUTREG(CMSTAT, sc->sc_intmask);
298
299#ifdef CM_DEBUG
300 if_printf(ifp, "reset: started receiver, status=0x%02x\n",
301 GETREG(CMSTAT));
302#endif
303
304 /* and init transmitter status */
305 sc->sc_tx_act = 0;
306 sc->sc_tx_fillcount = 0;
307
308 ifp->if_drv_flags |= IFF_DRV_RUNNING;
309 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
310
311 callout_reset(&sc->sc_watchdog_timer, hz, cm_watchdog, sc);
312 cm_start_locked(ifp);
313}
314
315/*
316 * Take interface offline
317 */
318void
319cm_stop_locked(sc)
320 struct cm_softc *sc;
321{
322 /* Stop the interrupts */
323 PUTREG(CMSTAT, 0);
324
325 /* Stop the interface */
326 GETREG(CMRESET);
327
328 /* Stop watchdog timer */
329 callout_stop(&sc->sc_watchdog_timer);
330 sc->sc_timer = 0;
331}
332
333void
334cm_start(struct ifnet *ifp)
335{
336 struct cm_softc *sc = ifp->if_softc;
337
338 CM_LOCK(sc);
339 cm_start_locked(ifp);
340 CM_UNLOCK(sc);
341}
342
343/*
344 * Start output on interface. Get another datagram to send
345 * off the interface queue, and copy it to the
346 * interface becore starting the output
347 *
348 * Assumes that sc_mtx is held
349 */
350void
351cm_start_locked(ifp)
352 struct ifnet *ifp;
353{
354 struct cm_softc *sc = ifp->if_softc;
355 struct mbuf *m, *mp;
356
357 int cm_ram_ptr;
358 int len, tlen, offset, buffer;
359#ifdef CMTIMINGS
360 u_long copystart, lencopy, perbyte;
361#endif
362
363#if defined(CM_DEBUG) && (CM_DEBUG > 3)
364 if_printf(ifp, "start(%p)\n", ifp);
365#endif
366
367 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
368 return;
369
370 if (sc->sc_tx_fillcount >= 2)
371 return;
372
373 m = arc_frag_next(ifp);
374 buffer = sc->sc_tx_act ^ 1;
375
376 if (m == 0)
377 return;
378
379#ifdef CM_DEBUG
380 if (m->m_len < ARC_HDRLEN)
381 m = m_pullup(m, ARC_HDRLEN);/* gcc does structure padding */
382 if_printf(ifp, "start: filling %d from %d to %d type %d\n",
383 buffer, mtod(m, u_char *)[0],
384 mtod(m, u_char *)[1], mtod(m, u_char *)[2]);
385#else
386 if (m->m_len < 2)
387 m = m_pullup(m, 2);
388#endif
389 cm_ram_ptr = buffer * 512;
390
391 if (m == 0)
392 return;
393
394 /* write the addresses to RAM and throw them away */
395
396 /*
397 * Hardware does this: Yet Another Microsecond Saved.
398 * (btw, timing code says usually 2 microseconds)
399 * PUTMEM(cm_ram_ptr + 0, mtod(m, u_char *)[0]);
400 */
401
402 PUTMEM(cm_ram_ptr + 1, mtod(m, u_char *)[1]);
403 m_adj(m, 2);
404
405 /* get total length left at this point */
406 tlen = m->m_pkthdr.len;
407 if (tlen < ARC_MIN_FORBID_LEN) {
408 offset = 256 - tlen;
409 PUTMEM(cm_ram_ptr + 2, offset);
410 } else {
411 PUTMEM(cm_ram_ptr + 2, 0);
412 if (tlen <= ARC_MAX_FORBID_LEN)
413 offset = 255; /* !!! */
414 else {
415 if (tlen > ARC_MAX_LEN)
416 tlen = ARC_MAX_LEN;
417 offset = 512 - tlen;
418 }
419 PUTMEM(cm_ram_ptr + 3, offset);
420
421 }
422 cm_ram_ptr += offset;
423
424 /* lets loop through the mbuf chain */
425
426 for (mp = m; mp; mp = mp->m_next) {
427 if ((len = mp->m_len)) { /* YAMS */
428 bus_space_write_region_1(
429 rman_get_bustag(sc->mem_res),
430 rman_get_bushandle(sc->mem_res),
431 cm_ram_ptr, mtod(mp, caddr_t), len);
432
433 cm_ram_ptr += len;
434 }
435 }
436
437 sc->sc_broadcast[buffer] = (m->m_flags & M_BCAST) != 0;
438 sc->sc_retransmits[buffer] = (m->m_flags & M_BCAST) ? 1 : 5;
439
440 if (++sc->sc_tx_fillcount > 1) {
441 /*
442 * We are filled up to the rim. No more bufs for the moment,
443 * please.
444 */
445 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
446 } else {
447#ifdef CM_DEBUG
448 if_printf(ifp, "start: starting transmitter on buffer %d\n",
449 buffer);
450#endif
451 /* Transmitter was off, start it */
452 sc->sc_tx_act = buffer;
453
454 /*
455 * We still can accept another buf, so don't:
456 * ifp->if_drv_flags |= IFF_DRV_OACTIVE;
457 */
458 sc->sc_intmask |= CM_TA;
459 PUTREG(CMCMD, CM_TX(buffer));
460 PUTREG(CMSTAT, sc->sc_intmask);
461
462 sc->sc_timer = ARCTIMEOUT;
463 }
464 m_freem(m);
465
466 /*
467 * After 10 times reading the docs, I realized
468 * that in the case the receiver NAKs the buffer request,
469 * the hardware retries till shutdown.
470 * This is integrated now in the code above.
471 */
472}
473
474#ifdef CMSOFTCOPY
475void
476cm_srint(void *vsc)
477{
478 struct cm_softc *sc = (struct cm_softc *)vsc;
479
480 CM_LOCK(sc);
481 cm_srint_locked(vsc);
482 CM_UNLOCK(sc);
483}
484#endif
485
486/*
487 * Arcnet interface receiver soft interrupt:
488 * get the stuff out of any filled buffer we find.
489 */
490void
491cm_srint_locked(vsc)
492 void *vsc;
493{
494 struct cm_softc *sc = (struct cm_softc *)vsc;
495 int buffer, len, offset, type;
496 int cm_ram_ptr;
497 struct mbuf *m;
498 struct arc_header *ah;
499 struct ifnet *ifp;
500
501 ifp = sc->sc_ifp;
502
503 buffer = sc->sc_rx_act ^ 1;
504
505 /* Allocate header mbuf */
506 MGETHDR(m, M_NOWAIT, MT_DATA);
507
508 if (m == 0) {
509 /*
510 * in case s.th. goes wrong with mem, drop it
511 * to make sure the receiver can be started again
512 * count it as input error (we dont have any other
513 * detectable)
514 */
|
515 ifp->if_ierrors++;
|
| 515 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); |
516 goto cleanup;
517 }
518
519 m->m_pkthdr.rcvif = ifp;
520
521 /*
522 * Align so that IP packet will be longword aligned. Here we
523 * assume that m_data of new packet is longword aligned.
524 * When implementing PHDS, we might have to change it to 2,
525 * (2*sizeof(ulong) - CM_HDRNEWLEN)), packet type dependent.
526 */
527
528 cm_ram_ptr = buffer * 512;
529 offset = GETMEM(cm_ram_ptr + 2);
530 if (offset)
531 len = 256 - offset;
532 else {
533 offset = GETMEM(cm_ram_ptr + 3);
534 len = 512 - offset;
535 }
536
537 /*
538 * first +2 bytes for align fixup below
539 * second +2 bytes are for src/dst addresses
540 */
541 if ((len + 2 + 2) > MHLEN) {
542 /* attach an mbuf cluster */
543 MCLGET(m, M_NOWAIT);
544
545 /* Insist on getting a cluster */
546 if ((m->m_flags & M_EXT) == 0) {
|
547 ifp->if_ierrors++;
|
| 547 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); |
548 goto cleanup;
549 }
550 }
551
552 if (m == 0) {
|
553 ifp->if_ierrors++;
|
| 553 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); |
554 goto cleanup;
555 }
556
557 type = GETMEM(cm_ram_ptr + offset);
558 m->m_data += 1 + arc_isphds(type);
559 /* mbuf filled with ARCnet addresses */
560 m->m_pkthdr.len = m->m_len = len + 2;
561
562 ah = mtod(m, struct arc_header *);
563 ah->arc_shost = GETMEM(cm_ram_ptr + 0);
564 ah->arc_dhost = GETMEM(cm_ram_ptr + 1);
565
566 bus_space_read_region_1(
567 rman_get_bustag(sc->mem_res), rman_get_bushandle(sc->mem_res),
568 cm_ram_ptr + offset, mtod(m, u_char *) + 2, len);
569
570 CM_UNLOCK(sc);
571 arc_input(ifp, m);
572 CM_LOCK(sc);
573
574 m = NULL;
|
575 ifp->if_ipackets++;
|
| 575 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); |
576
577cleanup:
578
579 if (m != NULL)
580 m_freem(m);
581
582 /* mark buffer as invalid by source id 0 */
583 PUTMEM(buffer << 9, 0);
584 if (--sc->sc_rx_fillcount == 2 - 1) {
585
586 /* was off, restart it on buffer just emptied */
587 sc->sc_rx_act = buffer;
588 sc->sc_intmask |= CM_RI;
589
590 /* this also clears the RI flag interrupt: */
591 PUTREG(CMCMD, CM_RXBC(buffer));
592 PUTREG(CMSTAT, sc->sc_intmask);
593
594#ifdef CM_DEBUG
595 if_printf(ifp, "srint: restarted rx on buf %d\n", buffer);
596#endif
597 }
598}
599
600static inline void
601cm_tint_locked(sc, isr)
602 struct cm_softc *sc;
603 int isr;
604{
605 struct ifnet *ifp;
606
607 int buffer;
608#ifdef CMTIMINGS
609 int clknow;
610#endif
611
612 ifp = sc->sc_ifp;
613 buffer = sc->sc_tx_act;
614
615 /*
616 * retransmit code:
617 * Normal situtations first for fast path:
618 * If acknowledgement received ok or broadcast, we're ok.
619 * else if
620 */
621
622 if (isr & CM_TMA || sc->sc_broadcast[buffer])
|
623 ifp->if_opackets++;
|
| 623 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); |
624#ifdef CMRETRANSMIT
625 else if (ifp->if_flags & IFF_LINK2 && sc->sc_timer > 0
626 && --sc->sc_retransmits[buffer] > 0) {
627 /* retransmit same buffer */
628 PUTREG(CMCMD, CM_TX(buffer));
629 return;
630 }
631#endif
632 else
|
633 ifp->if_oerrors++;
|
| 633 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); |
634
635
636 /* We know we can accept another buffer at this point. */
637 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
638
639 if (--sc->sc_tx_fillcount > 0) {
640
641 /*
642 * start tx on other buffer.
643 * This also clears the int flag
644 */
645 buffer ^= 1;
646 sc->sc_tx_act = buffer;
647
648 /*
649 * already given:
650 * sc->sc_intmask |= CM_TA;
651 * PUTREG(CMSTAT, sc->sc_intmask);
652 */
653 PUTREG(CMCMD, CM_TX(buffer));
654 /* init watchdog timer */
655 sc->sc_timer = ARCTIMEOUT;
656
657#if defined(CM_DEBUG) && (CM_DEBUG > 1)
658 if_printf(ifp,
659 "tint: starting tx on buffer %d, status 0x%02x\n",
660 buffer, GETREG(CMSTAT));
661#endif
662 } else {
663 /* have to disable TX interrupt */
664 sc->sc_intmask &= ~CM_TA;
665 PUTREG(CMSTAT, sc->sc_intmask);
666 /* ... and watchdog timer */
667 sc->sc_timer = 0;
668
669#ifdef CM_DEBUG
670 if_printf(ifp, "tint: no more buffers to send, status 0x%02x\n",
671 GETREG(CMSTAT));
672#endif
673 }
674
675 /* XXXX TODO */
676#ifdef CMSOFTCOPY
677 /* schedule soft int to fill a new buffer for us */
678 softintr_schedule(sc->sc_txcookie);
679#else
680 /* call it directly */
681 cm_start_locked(ifp);
682#endif
683}
684
685/*
686 * Our interrupt routine
687 */
688void
689cmintr(arg)
690 void *arg;
691{
692 struct cm_softc *sc = arg;
693 struct ifnet *ifp = sc->sc_ifp;
694
695 u_char isr, maskedisr;
696 int buffer;
697 u_long newsec;
698
699 CM_LOCK(sc);
700
701 isr = GETREG(CMSTAT);
702 maskedisr = isr & sc->sc_intmask;
703 if (!maskedisr || (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
704 CM_UNLOCK(sc);
705 return;
706 }
707
708 do {
709
710#if defined(CM_DEBUG) && (CM_DEBUG > 1)
711 if_printf(ifp, "intr: status 0x%02x, intmask 0x%02x\n",
712 isr, sc->sc_intmask);
713#endif
714
715 if (maskedisr & CM_POR) {
716 /*
717 * XXX We should never see this. Don't bother to store
718 * the address.
719 * sc->sc_ifp->if_l2com->ac_anaddr = GETMEM(CMMACOFF);
720 */
721 PUTREG(CMCMD, CM_CLR(CLR_POR));
722 log(LOG_WARNING,
723 "%s: intr: got spurious power on reset int\n",
724 ifp->if_xname);
725 }
726
727 if (maskedisr & CM_RECON) {
728 /*
729 * we dont need to:
730 * PUTREG(CMCMD, CM_CONF(CONF_LONG));
731 */
732 PUTREG(CMCMD, CM_CLR(CLR_RECONFIG));
|
733 ifp->if_collisions++;
|
| 733 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1); |
734
735 /*
736 * If less than 2 seconds per reconfig:
737 * If ARC_EXCESSIVE_RECONFIGS
738 * since last burst, complain and set treshold for
739 * warnings to ARC_EXCESSIVE_RECONS_REWARN.
740 *
741 * This allows for, e.g., new stations on the cable, or
742 * cable switching as long as it is over after
743 * (normally) 16 seconds.
744 *
745 * XXX TODO: check timeout bits in status word and
746 * double time if necessary.
747 */
748
749 callout_stop(&sc->sc_recon_ch);
750 newsec = time_second;
751 if ((newsec - sc->sc_recontime <= 2) &&
752 (++sc->sc_reconcount == ARC_EXCESSIVE_RECONS)) {
753 log(LOG_WARNING,
754 "%s: excessive token losses, "
755 "cable problem?\n",
756 ifp->if_xname);
757 }
758 sc->sc_recontime = newsec;
759 callout_reset(&sc->sc_recon_ch, 15 * hz,
760 cm_reconwatch_locked, (void *)sc);
761 }
762
763 if (maskedisr & CM_RI) {
764#if defined(CM_DEBUG) && (CM_DEBUG > 1)
765 if_printf(ifp, "intr: hard rint, act %d\n",
766 sc->sc_rx_act);
767#endif
768
769 buffer = sc->sc_rx_act;
770 /* look if buffer is marked invalid: */
771 if (GETMEM(buffer * 512) == 0) {
772 /*
773 * invalid marked buffer (or illegally
774 * configured sender)
775 */
776 log(LOG_WARNING,
777 "%s: spurious RX interrupt or sender 0 "
778 " (ignored)\n", ifp->if_xname);
779 /*
780 * restart receiver on same buffer.
781 * XXX maybe better reset interface?
782 */
783 PUTREG(CMCMD, CM_RXBC(buffer));
784 } else {
785 if (++sc->sc_rx_fillcount > 1) {
786 sc->sc_intmask &= ~CM_RI;
787 PUTREG(CMSTAT, sc->sc_intmask);
788 } else {
789 buffer ^= 1;
790 sc->sc_rx_act = buffer;
791
792 /*
793 * Start receiver on other receive
794 * buffer. This also clears the RI
795 * interrupt flag.
796 */
797 PUTREG(CMCMD, CM_RXBC(buffer));
798 /* in RX intr, so mask is ok for RX */
799
800#ifdef CM_DEBUG
801 if_printf(ifp, "strt rx for buf %d, "
802 "stat 0x%02x\n",
803 sc->sc_rx_act, GETREG(CMSTAT));
804#endif
805 }
806
807#ifdef CMSOFTCOPY
808 /*
809 * this one starts a soft int to copy out
810 * of the hw
811 */
812 softintr_schedule(sc->sc_rxcookie);
813#else
814 /* this one does the copy here */
815 cm_srint_locked(sc);
816#endif
817 }
818 }
819 if (maskedisr & CM_TA) {
820 cm_tint_locked(sc, isr);
821 }
822 isr = GETREG(CMSTAT);
823 maskedisr = isr & sc->sc_intmask;
824 } while (maskedisr);
825#if defined(CM_DEBUG) && (CM_DEBUG > 1)
826 if_printf(ifp, "intr (exit): status 0x%02x, intmask 0x%02x\n",
827 isr, sc->sc_intmask);
828#endif
829 CM_UNLOCK(sc);
830}
831
832void
833cm_reconwatch_locked(arg)
834 void *arg;
835{
836 struct cm_softc *sc = arg;
837 struct ifnet *ifp = sc->sc_ifp;
838
839 if (sc->sc_reconcount >= ARC_EXCESSIVE_RECONS) {
840 sc->sc_reconcount = 0;
841 log(LOG_WARNING, "%s: token valid again.\n",
842 ifp->if_xname);
843 }
844 sc->sc_reconcount = 0;
845}
846
847
848/*
849 * Process an ioctl request.
850 * This code needs some work - it looks pretty ugly.
851 */
852int
853cm_ioctl(ifp, command, data)
854 struct ifnet *ifp;
855 u_long command;
856 caddr_t data;
857{
858 struct cm_softc *sc;
859 int error;
860
861 error = 0;
862 sc = ifp->if_softc;
863
864#if defined(CM_DEBUG) && (CM_DEBUG > 2)
865 if_printf(ifp, "ioctl() called, cmd = 0x%lx\n", command);
866#endif
867
868 switch (command) {
869 case SIOCSIFADDR:
870 case SIOCGIFADDR:
871 case SIOCADDMULTI:
872 case SIOCDELMULTI:
873 case SIOCSIFMTU:
874 error = arc_ioctl(ifp, command, data);
875 break;
876
877 case SIOCSIFFLAGS:
878 CM_LOCK(sc);
879 if ((ifp->if_flags & IFF_UP) == 0 &&
880 (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
881 /*
882 * If interface is marked down and it is running,
883 * then stop it.
884 */
885 cm_stop_locked(sc);
886 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
887 } else if ((ifp->if_flags & IFF_UP) != 0 &&
888 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
889 /*
890 * If interface is marked up and it is stopped, then
891 * start it.
892 */
893 cm_init_locked(sc);
894 }
895 CM_UNLOCK(sc);
896 break;
897
898 default:
899 error = EINVAL;
900 break;
901 }
902
903 return (error);
904}
905
906/*
907 * watchdog routine for transmitter.
908 *
909 * We need this, because else a receiver whose hardware is alive, but whose
910 * software has not enabled the Receiver, would make our hardware wait forever
911 * Discovered this after 20 times reading the docs.
912 *
913 * Only thing we do is disable transmitter. We'll get a transmit timeout,
914 * and the int handler will have to decide not to retransmit (in case
915 * retransmission is implemented).
916 */
917void
918cm_watchdog(void *arg)
919{
920 struct cm_softc *sc;
921
922 sc = arg;
923 callout_reset(&sc->sc_watchdog_timer, hz, cm_watchdog, sc);
924 if (sc->sc_timer == 0 || --sc->sc_timer > 0)
925 return;
926 PUTREG(CMCMD, CM_TXDIS);
927}
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