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modules: add/correct module versions and depends
[dragonfly.git] / sys / dev / netif / ar / if_ar.c
blob6c6d68580322e38f316b1afd17f6930df37d4abd
1 /*-
2 * Copyright (c) 1995 - 2001 John Hay. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the author nor the names of any co-contributors
13 * may be used to endorse or promote products derived from this software
14 * without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY John Hay ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL John Hay BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: src/sys/dev/ar/if_ar.c,v 1.66 2005/01/06 01:42:28 imp Exp $
29 * $DragonFly: src/sys/dev/netif/ar/if_ar.c,v 1.23 2008/01/06 16:55:50 swildner Exp $
30 */
31
32 /*
33 * Programming assumptions and other issues.
34 *
35 * The descriptors of a DMA channel will fit in a 16K memory window.
36 *
37 * The buffers of a transmit DMA channel will fit in a 16K memory window.
38 *
39 * Only the ISA bus cards with X.21 and V.35 is tested.
40 *
41 * When interface is going up, handshaking is set and it is only cleared
42 * when the interface is down'ed.
43 *
44 * There should be a way to set/reset Raw HDLC/PPP, Loopback, DCE/DTE,
45 * internal/external clock, etc.....
46 */
47
48 #include "opt_netgraph.h"
49
50 #include <sys/param.h>
51 #include <sys/systm.h>
52 #include <sys/kernel.h>
53 #include <sys/malloc.h>
54 #include <sys/mbuf.h>
55 #include <sys/socket.h>
56 #include <sys/sockio.h>
57 #include <sys/module.h>
58 #include <sys/bus.h>
59 #include <sys/serialize.h>
60 #include <sys/rman.h>
61 #include <sys/thread2.h>
62
63 #include <net/if.h>
64 #ifdef NETGRAPH
65 #include <netgraph/ng_message.h>
66 #include <netgraph/netgraph.h>
67 #include <sys/syslog.h>
68 #include <dev/netif/ar/if_ar.h>
69 #else /* NETGRAPH */
70 #include <net/if_arp.h>
71 #include <net/sppp/if_sppp.h>
72 #include <net/bpf.h>
73 #endif /* NETGRAPH */
74
75 #include <machine/md_var.h>
76
77 #include <dev/netif/ic_layer/hd64570.h>
78 #include <dev/netif/ar/if_arregs.h>
79
80 #ifdef TRACE
81 #define TRC(x) x
82 #else
83 #define TRC(x)
84 #endif
85
86 #define TRCL(x) x
87
88 #define PPP_HEADER_LEN 4
89
90 devclass_t ar_devclass;
91
92 struct ar_softc {
93 #ifndef NETGRAPH
94 struct sppp ifsppp;
95 #endif /* NETGRAPH */
96 int unit; /* With regards to all ar devices */
97 int subunit; /* With regards to this card */
98 struct ar_hardc *hc;
99
100 struct buf_block {
101 u_int txdesc; /* On card address */
102 u_int txstart; /* On card address */
103 u_int txend; /* On card address */
104 u_int txtail; /* Index of first unused buffer */
105 u_int txmax; /* number of usable buffers/descriptors */
106 u_int txeda; /* Error descriptor addresses */
107 }block[AR_TX_BLOCKS];
108
109 char xmit_busy; /* Transmitter is busy */
110 char txb_inuse; /* Number of tx blocks currently in use */
111 u_char txb_new; /* Index to where new buffer will be added */
112 u_char txb_next_tx; /* Index to next block ready to tx */
113
114 u_int rxdesc; /* On card address */
115 u_int rxstart; /* On card address */
116 u_int rxend; /* On card address */
117 u_int rxhind; /* Index to the head of the rx buffers. */
118 u_int rxmax; /* number of usable buffers/descriptors */
119
120 int scano;
121 int scachan;
122 sca_regs *sca;
123 #ifdef NETGRAPH
124 int running; /* something is attached so we are running */
125 int dcd; /* do we have dcd? */
126 /* ---netgraph bits --- */
127 char nodename[NG_NODESIZ]; /* store our node name */
128 int datahooks; /* number of data hooks attached */
129 node_p node; /* netgraph node */
130 hook_p hook; /* data hook */
131 hook_p debug_hook;
132 struct ifqueue xmitq_hipri; /* hi-priority transmit queue */
133 struct ifqueue xmitq; /* transmit queue */
134 int flags; /* state */
135 #define SCF_RUNNING 0x01 /* board is active */
136 #define SCF_OACTIVE 0x02 /* output is active */
137 int out_dog; /* watchdog cycles output count-down */
138 struct callout timer; /* watchdog timer */
139 u_long inbytes, outbytes; /* stats */
140 u_long lastinbytes, lastoutbytes; /* a second ago */
141 u_long inrate, outrate; /* highest rate seen */
142 u_long inlast; /* last input N secs ago */
143 u_long out_deficit; /* output since last input */
144 u_long oerrors, ierrors[6];
145 u_long opackets, ipackets;
146 #endif /* NETGRAPH */
147 };
148
149 static int next_ar_unit = 0;
150 static struct lwkt_serialize ar_serializer;
151
152 #ifdef NETGRAPH
153 #define DOG_HOLDOFF 6 /* dog holds off for 6 secs */
154 #define QUITE_A_WHILE 300 /* 5 MINUTES */
155 #define LOTS_OF_PACKETS 100
156 #endif /* NETGRAPH */
157
158 /*
159 * This translate from irq numbers to
160 * the value that the arnet card needs
161 * in the lower part of the AR_INT_SEL
162 * register.
163 */
164 static int irqtable[16] = {
165 0, /* 0 */
166 0, /* 1 */
167 0, /* 2 */
168 1, /* 3 */
169 0, /* 4 */
170 2, /* 5 */
171 0, /* 6 */
172 3, /* 7 */
173 0, /* 8 */
174 0, /* 9 */
175 4, /* 10 */
176 5, /* 11 */
177 6, /* 12 */
178 0, /* 13 */
179 0, /* 14 */
180 7 /* 15 */
181 };
182
183 #ifndef NETGRAPH
184 DECLARE_DUMMY_MODULE(if_ar);
185 MODULE_DEPEND(if_ar, sppp, 1, 1, 1);
186 #else
187 MODULE_DEPEND(ng_sync_ar, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION);
188 #endif
189
190 static void arintr(void *arg);
191 static void ar_xmit(struct ar_softc *sc);
192 #ifndef NETGRAPH
193 static void arstart(struct ifnet *ifp);
194 static int arioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *);
195 static void arwatchdog(struct ifnet *ifp);
196 #else /* NETGRAPH */
197 static void arstart(struct ar_softc *sc);
198 static void arwatchdog(struct ar_softc *sc);
199 #endif /* NETGRAPH */
200 static int ar_packet_avail(struct ar_softc *sc, int *len, u_char *rxstat);
201 static void ar_copy_rxbuf(struct mbuf *m, struct ar_softc *sc, int len);
202 static void ar_eat_packet(struct ar_softc *sc, int single);
203 static void ar_get_packets(struct ar_softc *sc);
204
205 static int ar_read_pim_iface(volatile struct ar_hardc *hc, int channel);
206 static void ar_up(struct ar_softc *sc);
207 static void ar_down(struct ar_softc *sc);
208 static void arc_init(struct ar_hardc *hc);
209 static void ar_init_sca(struct ar_hardc *hc, int scano);
210 static void ar_init_msci(struct ar_softc *sc);
211 static void ar_init_rx_dmac(struct ar_softc *sc);
212 static void ar_init_tx_dmac(struct ar_softc *sc);
213 static void ar_dmac_intr(struct ar_hardc *hc, int scano, u_char isr);
214 static void ar_msci_intr(struct ar_hardc *hc, int scano, u_char isr);
215 static void ar_timer_intr(struct ar_hardc *hc, int scano, u_char isr);
216
217 #ifdef NETGRAPH
218 static void ngar_watchdog_frame(void * arg);
219 static void ngar_init(void* ignored);
220
221 static ng_constructor_t ngar_constructor;
222 static ng_rcvmsg_t ngar_rcvmsg;
223 static ng_shutdown_t ngar_shutdown;
224 static ng_newhook_t ngar_newhook;
225 /*static ng_findhook_t ngar_findhook; */
226 static ng_connect_t ngar_connect;
227 static ng_rcvdata_t ngar_rcvdata;
228 static ng_disconnect_t ngar_disconnect;
229
230 static struct ng_type typestruct = {
231 NG_VERSION,
232 NG_AR_NODE_TYPE,
233 NULL,
234 ngar_constructor,
235 ngar_rcvmsg,
236 ngar_shutdown,
237 ngar_newhook,
238 NULL,
239 ngar_connect,
240 ngar_rcvdata,
241 ngar_rcvdata,
242 ngar_disconnect,
243 NULL
244 };
245
246 static int ngar_done_init = 0;
247 #endif /* NETGRAPH */
248
249 int
250 ar_attach(device_t device)
251 {
252 struct ar_hardc *hc;
253 struct ar_softc *sc;
254 #ifndef NETGRAPH
255 struct ifnet *ifp;
256 char *iface;
257 #endif /* NETGRAPH */
258 int unit;
259 int error;
260
261 hc = (struct ar_hardc *)device_get_softc(device);
262 lwkt_serialize_init(&ar_serializer);
263
264 kprintf("arc%d: %uK RAM, %u ports, rev %u.\n",
265 hc->cunit,
266 hc->memsize/1024,
267 hc->numports,
268 hc->revision);
269
270 arc_init(hc);
271
272 error = BUS_SETUP_INTR(device_get_parent(device), device, hc->res_irq,
273 0, arintr, hc,
274 &hc->intr_cookie, &ar_serializer);
275 if (error)
276 return (1);
277
278 sc = hc->sc;
279
280 for(unit=0;unit<hc->numports;unit+=NCHAN)
281 ar_init_sca(hc, unit / NCHAN);
282
283 /*
284 * Now configure each port on the card.
285 */
286 for(unit=0;unit<hc->numports;sc++,unit++) {
287 sc->hc = hc;
288 sc->subunit = unit;
289 sc->unit = next_ar_unit;
290 next_ar_unit++;
291 sc->scano = unit / NCHAN;
292 sc->scachan = unit%NCHAN;
293
294 ar_init_rx_dmac(sc);
295 ar_init_tx_dmac(sc);
296 ar_init_msci(sc);
297
298 #ifndef NETGRAPH
299 ifp = &sc->ifsppp.pp_if;
300
301 ifp->if_softc = sc;
302 if_initname(ifp, device_get_name(device), sc->unit);
303 ifp->if_mtu = PP_MTU;
304 ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
305 ifp->if_ioctl = arioctl;
306 ifp->if_start = arstart;
307 ifp->if_watchdog = arwatchdog;
308
309 sc->ifsppp.pp_flags = PP_KEEPALIVE;
310
311 switch(hc->interface[unit]) {
312 default: iface = "UNKNOWN"; break;
313 case AR_IFACE_EIA_232: iface = "EIA-232"; break;
314 case AR_IFACE_V_35: iface = "EIA-232 or V.35"; break;
315 case AR_IFACE_EIA_530: iface = "EIA-530"; break;
316 case AR_IFACE_X_21: iface = "X.21"; break;
317 case AR_IFACE_COMBO: iface = "COMBO X.21 / EIA-530"; break;
318 }
319
320 kprintf("ar%d: Adapter %d, port %d, interface %s.\n",
321 sc->unit,
322 hc->cunit,
323 sc->subunit,
324 iface);
325
326 sppp_attach((struct ifnet *)&sc->ifsppp);
327 if_attach(ifp, &ar_serializer);
328
329 bpfattach(ifp, DLT_PPP, PPP_HEADER_LEN);
330 #else /* NETGRAPH */
331 /*
332 * we have found a node, make sure our 'type' is availabe.
333 */
334 if (ngar_done_init == 0) ngar_init(NULL);
335 if (ng_make_node_common(&typestruct, &sc->node) != 0)
336 return (1);
337 ksprintf(sc->nodename, "%s%d", NG_AR_NODE_TYPE, sc->unit);
338 if (ng_name_node(sc->node, sc->nodename)) {
339 NG_NODE_UNREF(sc->node); /* drop it again */
340 return (1);
341 }
342 NG_NODE_SET_PRIVATE(sc->node, sc);
343 callout_init(&sc->timer);
344 sc->xmitq.ifq_maxlen = IFQ_MAXLEN;
345 sc->xmitq_hipri.ifq_maxlen = IFQ_MAXLEN;
346 sc->running = 0;
347 #endif /* NETGRAPH */
348 }
349
350 if(hc->bustype == AR_BUS_ISA)
351 ARC_SET_OFF(hc);
352
353 return (0);
354 }
355
356 int
357 ar_detach(device_t device)
358 {
359 device_t parent = device_get_parent(device);
360 struct ar_hardc *hc = device_get_softc(device);
361 int error;
362
363 lwkt_serialize_enter(&ar_serializer);
364
365 if (hc->intr_cookie != NULL) {
366 if (BUS_TEARDOWN_INTR(parent, device,
367 hc->res_irq, hc->intr_cookie) != 0) {
368 kprintf("intr teardown failed.. continuing\n");
369 }
370 hc->intr_cookie = NULL;
371 }
372
373 /*
374 * deallocate any system resources we may have
375 * allocated on behalf of this driver.
376 */
377 FREE(hc->sc, M_DEVBUF);
378 hc->sc = NULL;
379 hc->mem_start = NULL;
380 error = ar_deallocate_resources(device);
381 lwkt_serialize_exit(&ar_serializer);
382
383 return (error);
384 }
385
386 int
387 ar_allocate_ioport(device_t device, int rid, u_long size)
388 {
389 struct ar_hardc *hc = device_get_softc(device);
390
391 hc->rid_ioport = rid;
392 hc->res_ioport = bus_alloc_resource(device, SYS_RES_IOPORT,
393 &hc->rid_ioport, 0ul, ~0ul, size, RF_ACTIVE);
394 if (hc->res_ioport == NULL) {
395 goto errexit;
396 }
397 hc->bt = rman_get_bustag(hc->res_ioport);
398 hc->bh = rman_get_bushandle(hc->res_ioport);
399
400 return (0);
401
402 errexit:
403 ar_deallocate_resources(device);
404 return (ENXIO);
405 }
406
407 int
408 ar_allocate_irq(device_t device, int rid, u_long size)
409 {
410 struct ar_hardc *hc = device_get_softc(device);
411
412 hc->rid_irq = rid;
413 hc->res_irq = bus_alloc_resource_any(device, SYS_RES_IRQ,
414 &hc->rid_irq, RF_SHAREABLE|RF_ACTIVE);
415 if (hc->res_irq == NULL) {
416 goto errexit;
417 }
418 return (0);
419
420 errexit:
421 ar_deallocate_resources(device);
422 return (ENXIO);
423 }
424
425 int
426 ar_allocate_memory(device_t device, int rid, u_long size)
427 {
428 struct ar_hardc *hc = device_get_softc(device);
429
430 hc->rid_memory = rid;
431 hc->res_memory = bus_alloc_resource(device, SYS_RES_MEMORY,
432 &hc->rid_memory, 0ul, ~0ul, size, RF_ACTIVE);
433 if (hc->res_memory == NULL) {
434 goto errexit;
435 }
436 return (0);
437
438 errexit:
439 ar_deallocate_resources(device);
440 return (ENXIO);
441 }
442
443 int
444 ar_allocate_plx_memory(device_t device, int rid, u_long size)
445 {
446 struct ar_hardc *hc = device_get_softc(device);
447
448 hc->rid_plx_memory = rid;
449 hc->res_plx_memory = bus_alloc_resource(device, SYS_RES_MEMORY,
450 &hc->rid_plx_memory, 0ul, ~0ul, size, RF_ACTIVE);
451 if (hc->res_plx_memory == NULL) {
452 goto errexit;
453 }
454 return (0);
455
456 errexit:
457 ar_deallocate_resources(device);
458 return (ENXIO);
459 }
460
461 int
462 ar_deallocate_resources(device_t device)
463 {
464 struct ar_hardc *hc = device_get_softc(device);
465
466 if (hc->res_irq != 0) {
467 bus_deactivate_resource(device, SYS_RES_IRQ,
468 hc->rid_irq, hc->res_irq);
469 bus_release_resource(device, SYS_RES_IRQ,
470 hc->rid_irq, hc->res_irq);
471 hc->res_irq = 0;
472 }
473 if (hc->res_ioport != 0) {
474 bus_deactivate_resource(device, SYS_RES_IOPORT,
475 hc->rid_ioport, hc->res_ioport);
476 bus_release_resource(device, SYS_RES_IOPORT,
477 hc->rid_ioport, hc->res_ioport);
478 hc->res_ioport = 0;
479 }
480 if (hc->res_memory != 0) {
481 bus_deactivate_resource(device, SYS_RES_MEMORY,
482 hc->rid_memory, hc->res_memory);
483 bus_release_resource(device, SYS_RES_MEMORY,
484 hc->rid_memory, hc->res_memory);
485 hc->res_memory = 0;
486 }
487 if (hc->res_plx_memory != 0) {
488 bus_deactivate_resource(device, SYS_RES_MEMORY,
489 hc->rid_plx_memory, hc->res_plx_memory);
490 bus_release_resource(device, SYS_RES_MEMORY,
491 hc->rid_plx_memory, hc->res_plx_memory);
492 hc->res_plx_memory = 0;
493 }
494 return (0);
495 }
496
497 /*
498 * First figure out which SCA gave the interrupt.
499 * Process it.
500 * See if there is other interrupts pending.
501 * Repeat until there is no more interrupts.
502 */
503 static void
504 arintr(void *arg)
505 {
506 struct ar_hardc *hc = (struct ar_hardc *)arg;
507 sca_regs *sca;
508 u_char isr0, isr1, isr2, arisr;
509 int scano;
510
511 /* XXX Use the PCI interrupt score board register later */
512 if(hc->bustype == AR_BUS_PCI)
513 arisr = hc->orbase[AR_ISTAT * 4];
514 else
515 arisr = ar_inb(hc, AR_ISTAT);
516
517 while(arisr & AR_BD_INT) {
518 TRC(kprintf("arisr = %x\n", arisr));
519 if(arisr & AR_INT_0)
520 scano = 0;
521 else if(arisr & AR_INT_1)
522 scano = 1;
523 else {
524 /* XXX Oops this shouldn't happen. */
525 kprintf("arc%d: Interrupted with no interrupt.\n",
526 hc->cunit);
527 return;
528 }
529 sca = hc->sca[scano];
530
531 if(hc->bustype == AR_BUS_ISA)
532 ARC_SET_SCA(hc, scano);
533
534 isr0 = sca->isr0;
535 isr1 = sca->isr1;
536 isr2 = sca->isr2;
537
538 TRC(kprintf("arc%d: ARINTR isr0 %x, isr1 %x, isr2 %x\n",
539 hc->cunit,
540 isr0,
541 isr1,
542 isr2));
543 if(isr0)
544 ar_msci_intr(hc, scano, isr0);
545
546 if(isr1)
547 ar_dmac_intr(hc, scano, isr1);
548
549 if(isr2)
550 ar_timer_intr(hc, scano, isr2);
551
552 /*
553 * Proccess the second sca's interrupt if available.
554 * Else see if there are any new interrupts.
555 */
556 if((arisr & AR_INT_0) && (arisr & AR_INT_1))
557 arisr &= ~AR_INT_0;
558 else {
559 if(hc->bustype == AR_BUS_PCI)
560 arisr = hc->orbase[AR_ISTAT * 4];
561 else
562 arisr = ar_inb(hc, AR_ISTAT);
563 }
564 }
565
566 if(hc->bustype == AR_BUS_ISA)
567 ARC_SET_OFF(hc);
568 }
569
570
571 /*
572 * This will only start the transmitter. It is assumed that the data
573 * is already there. It is normally called from arstart() or ar_dmac_intr().
574 *
575 */
576 static void
577 ar_xmit(struct ar_softc *sc)
578 {
579 #ifndef NETGRAPH
580 struct ifnet *ifp;
581 #endif /* NETGRAPH */
582 dmac_channel *dmac;
583
584 #ifndef NETGRAPH
585 ifp = &sc->ifsppp.pp_if;
586 #endif /* NETGRAPH */
587 dmac = &sc->sca->dmac[DMAC_TXCH(sc->scachan)];
588
589 if(sc->hc->bustype == AR_BUS_ISA)
590 ARC_SET_SCA(sc->hc, sc->scano);
591 dmac->cda = (u_short)(sc->block[sc->txb_next_tx].txdesc & 0xffff);
592
593 dmac->eda = (u_short)(sc->block[sc->txb_next_tx].txeda & 0xffff);
594 dmac->dsr = SCA_DSR_DE;
595
596 sc->xmit_busy = 1;
597
598 sc->txb_next_tx++;
599 if(sc->txb_next_tx == AR_TX_BLOCKS)
600 sc->txb_next_tx = 0;
601
602 #ifndef NETGRAPH
603 ifp->if_timer = 2; /* Value in seconds. */
604 #else /* NETGRAPH */
605 sc->out_dog = DOG_HOLDOFF; /* give ourself some breathing space*/
606 #endif /* NETGRAPH */
607 if(sc->hc->bustype == AR_BUS_ISA)
608 ARC_SET_OFF(sc->hc);
609 }
610
611 /*
612 * This function will be called from the upper level when a user add a
613 * packet to be send, and from the interrupt handler after a finished
614 * transmit.
615 *
616 * This function only place the data in the oncard buffers. It does not
617 * start the transmition. ar_xmit() does that.
618 *
619 * Transmitter idle state is indicated by the IFF_OACTIVE flag. The function
620 * that clears that should ensure that the transmitter and its DMA is
621 * in a "good" idle state.
622 */
623 #ifndef NETGRAPH
624 static void
625 arstart(struct ifnet *ifp)
626 {
627 struct ar_softc *sc = ifp->if_softc;
628 #else /* NETGRAPH */
629 static void
630 arstart(struct ar_softc *sc)
631 {
632 #endif /* NETGRAPH */
633 int i, len, tlen;
634 struct mbuf *mtx;
635 u_char *txdata;
636 sca_descriptor *txdesc;
637 struct buf_block *blkp;
638
639 #ifndef NETGRAPH
640 if(!(ifp->if_flags & IFF_RUNNING))
641 return;
642 #else /* NETGRAPH */
643 /* XXX */
644 #endif /* NETGRAPH */
645
646 top_arstart:
647
648 /*
649 * See if we have space for more packets.
650 */
651 if(sc->txb_inuse == AR_TX_BLOCKS) {
652 #ifndef NETGRAPH
653 ifp->if_flags |= IFF_OACTIVE; /* yes, mark active */
654 #else /* NETGRAPH */
655 /*XXX*/ /*ifp->if_flags |= IFF_OACTIVE;*/ /* yes, mark active */
656 #endif /* NETGRAPH */
657 return;
658 }
659
660 #ifndef NETGRAPH
661 mtx = sppp_dequeue(ifp);
662 #else /* NETGRAPH */
663 IF_DEQUEUE(&sc->xmitq_hipri, mtx);
664 if (mtx == NULL) {
665 IF_DEQUEUE(&sc->xmitq, mtx);
666 }
667 #endif /* NETGRAPH */
668 if(!mtx)
669 return;
670
671 /*
672 * It is OK to set the memory window outside the loop because
673 * all tx buffers and descriptors are assumed to be in the same
674 * 16K window.
675 */
676 if(sc->hc->bustype == AR_BUS_ISA)
677 ARC_SET_MEM(sc->hc, sc->block[0].txdesc);
678
679 /*
680 * We stay in this loop until there is nothing in the
681 * TX queue left or the tx buffer is full.
682 */
683 i = 0;
684 blkp = &sc->block[sc->txb_new];
685 txdesc = (sca_descriptor *)
686 (sc->hc->mem_start + (blkp->txdesc & sc->hc->winmsk));
687 txdata = (u_char *)(sc->hc->mem_start + (blkp->txstart & sc->hc->winmsk));
688 for(;;) {
689 len = mtx->m_pkthdr.len;
690
691 TRC(kprintf("ar%d: ARstart len %u\n", sc->unit, len));
692
693 /*
694 * We can do this because the tx buffers don't wrap.
695 */
696 m_copydata(mtx, 0, len, txdata);
697 tlen = len;
698 while(tlen > AR_BUF_SIZ) {
699 txdesc->stat = 0;
700 txdesc->len = AR_BUF_SIZ;
701 tlen -= AR_BUF_SIZ;
702 txdesc++;
703 txdata += AR_BUF_SIZ;
704 i++;
705 }
706 /* XXX Move into the loop? */
707 txdesc->stat = SCA_DESC_EOM;
708 txdesc->len = tlen;
709 txdesc++;
710 txdata += AR_BUF_SIZ;
711 i++;
712
713 #ifndef NETGRAPH
714 BPF_MTAP(ifp, mtx);
715 m_freem(mtx);
716 ++sc->ifsppp.pp_if.if_opackets;
717 #else /* NETGRAPH */
718 m_freem(mtx);
719 sc->outbytes += len;
720 ++sc->opackets;
721 #endif /* NETGRAPH */
722
723 /*
724 * Check if we have space for another mbuf.
725 * XXX This is hardcoded. A packet won't be larger
726 * than 3 buffers (3 x 512).
727 */
728 if((i + 3) >= blkp->txmax)
729 break;
730
731 #ifndef NETGRAPH
732 mtx = sppp_dequeue(ifp);
733 #else /* NETGRAPH */
734 IF_DEQUEUE(&sc->xmitq_hipri, mtx);
735 if (mtx == NULL) {
736 IF_DEQUEUE(&sc->xmitq, mtx);
737 }
738 #endif /* NETGRAPH */
739 if(!mtx)
740 break;
741 }
742
743 blkp->txtail = i;
744
745 /*
746 * Mark the last descriptor, so that the SCA know where
747 * to stop.
748 */
749 txdesc--;
750 txdesc->stat |= SCA_DESC_EOT;
751
752 txdesc = (sca_descriptor *)blkp->txdesc;
753 blkp->txeda = (u_short)((u_int)&txdesc[i]);
754
755 #if 0
756 kprintf("ARstart: %p desc->cp %x\n", &txdesc->cp, txdesc->cp);
757 kprintf("ARstart: %p desc->bp %x\n", &txdesc->bp, txdesc->bp);
758 kprintf("ARstart: %p desc->bpb %x\n", &txdesc->bpb, txdesc->bpb);
759 kprintf("ARstart: %p desc->len %x\n", &txdesc->len, txdesc->len);
760 kprintf("ARstart: %p desc->stat %x\n", &txdesc->stat, txdesc->stat);
761 #endif
762
763 sc->txb_inuse++;
764 sc->txb_new++;
765 if(sc->txb_new == AR_TX_BLOCKS)
766 sc->txb_new = 0;
767
768 if(sc->xmit_busy == 0)
769 ar_xmit(sc);
770
771 if(sc->hc->bustype == AR_BUS_ISA)
772 ARC_SET_OFF(sc->hc);
773
774 goto top_arstart;
775 }
776
777 #ifndef NETGRAPH
778 static int
779 arioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
780 {
781 int error;
782 int was_up, should_be_up;
783 struct ar_softc *sc = ifp->if_softc;
784
785 TRC(if_printf(ifp, "arioctl.\n");)
786
787 was_up = ifp->if_flags & IFF_RUNNING;
788
789 error = sppp_ioctl(ifp, cmd, data);
790 TRC(if_printf(ifp, "ioctl: ifsppp.pp_flags = %x, if_flags %x.\n",
791 ((struct sppp *)ifp)->pp_flags, ifp->if_flags);)
792 if(error)
793 return (error);
794
795 if((cmd != SIOCSIFFLAGS) && cmd != (SIOCSIFADDR))
796 return (0);
797
798 TRC(if_printf(ifp, "arioctl %s.\n",
799 (cmd == SIOCSIFFLAGS) ? "SIOCSIFFLAGS" : "SIOCSIFADDR");)
800
801 should_be_up = ifp->if_flags & IFF_RUNNING;
802
803 if(!was_up && should_be_up) {
804 /* Interface should be up -- start it. */
805 ar_up(sc);
806 arstart(ifp);
807 /* XXX Maybe clear the IFF_UP flag so that the link
808 * will only go up after sppp lcp and ipcp negotiation.
809 */
810 } else if(was_up && !should_be_up) {
811 /* Interface should be down -- stop it. */
812 ar_down(sc);
813 sppp_flush(ifp);
814 }
815 return (0);
816 }
817 #endif /* NETGRAPH */
818
819 /*
820 * This is to catch lost tx interrupts.
821 */
822 static void
823 #ifndef NETGRAPH
824 arwatchdog(struct ifnet *ifp)
825 {
826 struct ar_softc *sc = ifp->if_softc;
827 #else /* NETGRAPH */
828 arwatchdog(struct ar_softc *sc)
829 {
830 #endif /* NETGRAPH */
831 msci_channel *msci = &sc->sca->msci[sc->scachan];
832
833 #ifndef NETGRAPH
834 if(!(ifp->if_flags & IFF_RUNNING))
835 return;
836 #endif /* NETGRAPH */
837
838 if(sc->hc->bustype == AR_BUS_ISA)
839 ARC_SET_SCA(sc->hc, sc->scano);
840
841 /* XXX if(sc->ifsppp.pp_if.if_flags & IFF_DEBUG) */
842 kprintf("ar%d: transmit failed, "
843 "ST0 %x, ST1 %x, ST3 %x, DSR %x.\n",
844 sc->unit,
845 msci->st0,
846 msci->st1,
847 msci->st3,
848 sc->sca->dmac[DMAC_TXCH(sc->scachan)].dsr);
849
850 if(msci->st1 & SCA_ST1_UDRN) {
851 msci->cmd = SCA_CMD_TXABORT;
852 msci->cmd = SCA_CMD_TXENABLE;
853 msci->st1 = SCA_ST1_UDRN;
854 }
855
856 sc->xmit_busy = 0;
857 #ifndef NETGRAPH
858 ifp->if_flags &= ~IFF_OACTIVE;
859 #else /* NETGRAPH */
860 /* XXX ifp->if_flags &= ~IFF_OACTIVE; */
861 #endif /* NETGRAPH */
862
863 if(sc->txb_inuse && --sc->txb_inuse)
864 ar_xmit(sc);
865
866 #ifndef NETGRAPH
867 arstart(ifp);
868 #else /* NETGRAPH */
869 arstart(sc);
870 #endif /* NETGRAPH */
871 }
872
873 static void
874 ar_up(struct ar_softc *sc)
875 {
876 sca_regs *sca;
877 msci_channel *msci;
878
879 sca = sc->sca;
880 msci = &sca->msci[sc->scachan];
881
882 TRC(kprintf("ar%d: sca %p, msci %p, ch %d\n",
883 sc->unit, sca, msci, sc->scachan));
884
885 /*
886 * Enable transmitter and receiver.
887 * Raise DTR and RTS.
888 * Enable interrupts.
889 */
890 if(sc->hc->bustype == AR_BUS_ISA)
891 ARC_SET_SCA(sc->hc, sc->scano);
892
893 /* XXX
894 * What about using AUTO mode in msci->md0 ???
895 * And what about CTS/DCD etc... ?
896 */
897 if(sc->hc->handshake & AR_SHSK_RTS)
898 msci->ctl &= ~SCA_CTL_RTS;
899 if(sc->hc->handshake & AR_SHSK_DTR) {
900 sc->hc->txc_dtr[sc->scano] &= sc->scachan ?
901 ~AR_TXC_DTR_DTR1 : ~AR_TXC_DTR_DTR0;
902 if(sc->hc->bustype == AR_BUS_PCI)
903 sc->hc->orbase[sc->hc->txc_dtr_off[sc->scano]] =
904 sc->hc->txc_dtr[sc->scano];
905 else
906 ar_outb(sc->hc, sc->hc->txc_dtr_off[sc->scano],
907 sc->hc->txc_dtr[sc->scano]);
908 }
909
910 if(sc->scachan == 0) {
911 sca->ier0 |= 0x0F;
912 sca->ier1 |= 0x0F;
913 } else {
914 sca->ier0 |= 0xF0;
915 sca->ier1 |= 0xF0;
916 }
917
918 msci->cmd = SCA_CMD_RXENABLE;
919 if(sc->hc->bustype == AR_BUS_ISA)
920 ar_inb(sc->hc, AR_ID_5); /* XXX slow it down a bit. */
921 msci->cmd = SCA_CMD_TXENABLE;
922
923 if(sc->hc->bustype == AR_BUS_ISA)
924 ARC_SET_OFF(sc->hc);
925 #ifdef NETGRAPH
926 callout_reset(&sc->timer, hz, ngar_watchdog_frame, sc);
927 sc->running = 1;
928 #endif /* NETGRAPH */
929 }
930
931 static void
932 ar_down(struct ar_softc *sc)
933 {
934 sca_regs *sca;
935 msci_channel *msci;
936
937 sca = sc->sca;
938 msci = &sca->msci[sc->scachan];
939
940 #ifdef NETGRAPH
941 callout_stop(&sc->timer);
942 sc->running = 0;
943 #endif /* NETGRAPH */
944 /*
945 * Disable transmitter and receiver.
946 * Lower DTR and RTS.
947 * Disable interrupts.
948 */
949 if(sc->hc->bustype == AR_BUS_ISA)
950 ARC_SET_SCA(sc->hc, sc->scano);
951 msci->cmd = SCA_CMD_RXDISABLE;
952 if(sc->hc->bustype == AR_BUS_ISA)
953 ar_inb(sc->hc, AR_ID_5); /* XXX slow it down a bit. */
954 msci->cmd = SCA_CMD_TXDISABLE;
955
956 if(sc->hc->handshake & AR_SHSK_RTS)
957 msci->ctl |= SCA_CTL_RTS;
958 if(sc->hc->handshake & AR_SHSK_DTR) {
959 sc->hc->txc_dtr[sc->scano] |= sc->scachan ?
960 AR_TXC_DTR_DTR1 : AR_TXC_DTR_DTR0;
961 if(sc->hc->bustype == AR_BUS_PCI)
962 sc->hc->orbase[sc->hc->txc_dtr_off[sc->scano]] =
963 sc->hc->txc_dtr[sc->scano];
964 else
965 ar_outb(sc->hc, sc->hc->txc_dtr_off[sc->scano],
966 sc->hc->txc_dtr[sc->scano]);
967 }
968
969 if(sc->scachan == 0) {
970 sca->ier0 &= ~0x0F;
971 sca->ier1 &= ~0x0F;
972 } else {
973 sca->ier0 &= ~0xF0;
974 sca->ier1 &= ~0xF0;
975 }
976
977 if(sc->hc->bustype == AR_BUS_ISA)
978 ARC_SET_OFF(sc->hc);
979 }
980
981 static int
982 ar_read_pim_iface(volatile struct ar_hardc *hc, int channel)
983 {
984 int ctype, i, val, x;
985 volatile u_char *pimctrl;
986
987 ctype = 0;
988 val = 0;
989
990 pimctrl = hc->orbase + AR_PIMCTRL;
991
992 /* Reset the PIM */
993 *pimctrl = 0x00;
994 *pimctrl = AR_PIM_STROBE;
995
996 /* Check if there is a PIM */
997 *pimctrl = 0x00;
998 *pimctrl = AR_PIM_READ;
999 x = *pimctrl;
1000 TRC(kprintf("x = %x", x));
1001 if(x & AR_PIM_DATA) {
1002 kprintf("No PIM installed\n");
1003 return (AR_IFACE_UNKNOWN);
1004 }
1005
1006 x = (x >> 1) & 0x01;
1007 val |= x << 0;
1008
1009 /* Now read the next 15 bits */
1010 for(i = 1; i < 16; i++) {
1011 *pimctrl = AR_PIM_READ;
1012 *pimctrl = AR_PIM_READ | AR_PIM_STROBE;
1013 x = *pimctrl;
1014 TRC(kprintf(" %x ", x));
1015 x = (x >> 1) & 0x01;
1016 val |= x << i;
1017 if(i == 8 && (val & 0x000f) == 0x0004) {
1018 int ii;
1019
1020 /* Start bit */
1021 *pimctrl = AR_PIM_A2D_DOUT | AR_PIM_A2D_STROBE;
1022 *pimctrl = AR_PIM_A2D_DOUT;
1023
1024 /* Mode bit */
1025 *pimctrl = AR_PIM_A2D_DOUT | AR_PIM_A2D_STROBE;
1026 *pimctrl = AR_PIM_A2D_DOUT;
1027
1028 /* Sign bit */
1029 *pimctrl = AR_PIM_A2D_DOUT | AR_PIM_A2D_STROBE;
1030 *pimctrl = AR_PIM_A2D_DOUT;
1031
1032 /* Select channel */
1033 *pimctrl = AR_PIM_A2D_STROBE | ((channel & 2) << 2);
1034 *pimctrl = ((channel & 2) << 2);
1035 *pimctrl = AR_PIM_A2D_STROBE | ((channel & 1) << 3);
1036 *pimctrl = ((channel & 1) << 3);
1037
1038 *pimctrl = AR_PIM_A2D_STROBE;
1039
1040 x = *pimctrl;
1041 if(x & AR_PIM_DATA)
1042 kprintf("\nOops A2D start bit not zero (%X)\n", x);
1043
1044 for(ii = 7; ii >= 0; ii--) {
1045 *pimctrl = 0x00;
1046 *pimctrl = AR_PIM_A2D_STROBE;
1047 x = *pimctrl;
1048 if(x & AR_PIM_DATA)
1049 ctype |= 1 << ii;
1050 }
1051 }
1052 }
1053 TRC(kprintf("\nPIM val %x, ctype %x, %d\n", val, ctype, ctype));
1054 *pimctrl = AR_PIM_MODEG;
1055 *pimctrl = AR_PIM_MODEG | AR_PIM_AUTO_LED;
1056 if(ctype > 255)
1057 return (AR_IFACE_UNKNOWN);
1058 if(ctype > 239)
1059 return (AR_IFACE_V_35);
1060 if(ctype > 207)
1061 return (AR_IFACE_EIA_232);
1062 if(ctype > 178)
1063 return (AR_IFACE_X_21);
1064 if(ctype > 150)
1065 return (AR_IFACE_EIA_530);
1066 if(ctype > 25)
1067 return (AR_IFACE_UNKNOWN);
1068 if(ctype > 7)
1069 return (AR_IFACE_LOOPBACK);
1070 return (AR_IFACE_UNKNOWN);
1071 }
1072
1073 /*
1074 * Initialize the card, allocate memory for the ar_softc structures
1075 * and fill in the pointers.
1076 */
1077 static void
1078 arc_init(struct ar_hardc *hc)
1079 {
1080 struct ar_softc *sc;
1081 int x;
1082 u_int chanmem;
1083 u_int bufmem;
1084 u_int next;
1085 u_int descneeded;
1086 u_char isr, mar;
1087 u_long memst;
1088
1089 MALLOC(sc, struct ar_softc *, hc->numports * sizeof(struct ar_softc),
1090 M_DEVBUF, M_WAITOK | M_ZERO);
1091 hc->sc = sc;
1092
1093 hc->txc_dtr[0] = AR_TXC_DTR_NOTRESET |
1094 AR_TXC_DTR_DTR0 | AR_TXC_DTR_DTR1;
1095 hc->txc_dtr[1] = AR_TXC_DTR_DTR0 | AR_TXC_DTR_DTR1;
1096 hc->txc_dtr_off[0] = AR_TXC_DTR0;
1097 hc->txc_dtr_off[1] = AR_TXC_DTR2;
1098 if(hc->bustype == AR_BUS_PCI) {
1099 hc->txc_dtr_off[0] *= 4;
1100 hc->txc_dtr_off[1] *= 4;
1101 }
1102
1103 /*
1104 * reset the card and wait at least 1uS.
1105 */
1106 if(hc->bustype == AR_BUS_PCI)
1107 hc->orbase[AR_TXC_DTR0 * 4] = ~AR_TXC_DTR_NOTRESET &
1108 hc->txc_dtr[0];
1109 else
1110 ar_outb(hc, AR_TXC_DTR0, ~AR_TXC_DTR_NOTRESET &
1111 hc->txc_dtr[0]);
1112 DELAY(2);
1113 if(hc->bustype == AR_BUS_PCI)
1114 hc->orbase[AR_TXC_DTR0 * 4] = hc->txc_dtr[0];
1115 else
1116 ar_outb(hc, AR_TXC_DTR0, hc->txc_dtr[0]);
1117
1118 if(hc->bustype == AR_BUS_ISA) {
1119 /*
1120 * Configure the card.
1121 * Mem address, irq,
1122 */
1123 memst = rman_get_start(hc->res_memory);
1124 mar = memst >> 16;
1125 isr = irqtable[hc->isa_irq] << 1;
1126 if(isr == 0)
1127 kprintf("ar%d: Warning illegal interrupt %d\n",
1128 hc->cunit, hc->isa_irq);
1129 isr = isr | ((memst & 0xc000) >> 10);
1130
1131 hc->sca[0] = (sca_regs *)hc->mem_start;
1132 hc->sca[1] = (sca_regs *)hc->mem_start;
1133
1134 ar_outb(hc, AR_MEM_SEL, mar);
1135 ar_outb(hc, AR_INT_SEL, isr | AR_INTS_CEN);
1136 }
1137
1138 if(hc->bustype == AR_BUS_PCI && hc->interface[0] == AR_IFACE_PIM)
1139 for(x = 0; x < hc->numports; x++)
1140 hc->interface[x] = ar_read_pim_iface(hc, x);
1141
1142 /*
1143 * Set the TX clock direction and enable TX.
1144 */
1145 for(x=0;x<hc->numports;x++) {
1146 switch(hc->interface[x]) {
1147 case AR_IFACE_V_35:
1148 hc->txc_dtr[x / NCHAN] |= (x % NCHAN == 0) ?
1149 AR_TXC_DTR_TX0 : AR_TXC_DTR_TX1;
1150 hc->txc_dtr[x / NCHAN] |= (x % NCHAN == 0) ?
1151 AR_TXC_DTR_TXCS0 : AR_TXC_DTR_TXCS1;
1152 break;
1153 case AR_IFACE_EIA_530:
1154 case AR_IFACE_COMBO:
1155 case AR_IFACE_X_21:
1156 hc->txc_dtr[x / NCHAN] |= (x % NCHAN == 0) ?
1157 AR_TXC_DTR_TX0 : AR_TXC_DTR_TX1;
1158 break;
1159 }
1160 }
1161
1162 if(hc->bustype == AR_BUS_PCI)
1163 hc->orbase[AR_TXC_DTR0 * 4] = hc->txc_dtr[0];
1164 else
1165 ar_outb(hc, AR_TXC_DTR0, hc->txc_dtr[0]);
1166 if(hc->numports > NCHAN) {
1167 if(hc->bustype == AR_BUS_PCI)
1168 hc->orbase[AR_TXC_DTR2 * 4] = hc->txc_dtr[1];
1169 else
1170 ar_outb(hc, AR_TXC_DTR2, hc->txc_dtr[1]);
1171 }
1172
1173 chanmem = hc->memsize / hc->numports;
1174 next = 0;
1175
1176 for(x=0;x<hc->numports;x++, sc++) {
1177 int blk;
1178
1179 sc->sca = hc->sca[x / NCHAN];
1180
1181 for(blk = 0; blk < AR_TX_BLOCKS; blk++) {
1182 sc->block[blk].txdesc = next;
1183 bufmem = (16 * 1024) / AR_TX_BLOCKS;
1184 descneeded = bufmem / AR_BUF_SIZ;
1185 sc->block[blk].txstart = sc->block[blk].txdesc +
1186 ((((descneeded * sizeof(sca_descriptor)) /
1187 AR_BUF_SIZ) + 1) * AR_BUF_SIZ);
1188 sc->block[blk].txend = next + bufmem;
1189 sc->block[blk].txmax =
1190 (sc->block[blk].txend - sc->block[blk].txstart)
1191 / AR_BUF_SIZ;
1192 next += bufmem;
1193
1194 TRC(kprintf("ar%d: blk %d: txdesc %x, txstart %x, "
1195 "txend %x, txmax %d\n",
1196 x,
1197 blk,
1198 sc->block[blk].txdesc,
1199 sc->block[blk].txstart,
1200 sc->block[blk].txend,
1201 sc->block[blk].txmax));
1202 }
1203
1204 sc->rxdesc = next;
1205 bufmem = chanmem - (bufmem * AR_TX_BLOCKS);
1206 descneeded = bufmem / AR_BUF_SIZ;
1207 sc->rxstart = sc->rxdesc +
1208 ((((descneeded * sizeof(sca_descriptor)) /
1209 AR_BUF_SIZ) + 1) * AR_BUF_SIZ);
1210 sc->rxend = next + bufmem;
1211 sc->rxmax = (sc->rxend - sc->rxstart) / AR_BUF_SIZ;
1212 next += bufmem;
1213 TRC(kprintf("ar%d: rxdesc %x, rxstart %x, "
1214 "rxend %x, rxmax %d\n",
1215 x, sc->rxdesc, sc->rxstart, sc->rxend, sc->rxmax));
1216 }
1217
1218 if(hc->bustype == AR_BUS_PCI)
1219 hc->orbase[AR_PIMCTRL] = AR_PIM_MODEG | AR_PIM_AUTO_LED;
1220 }
1221
1222
1223 /*
1224 * The things done here are channel independent.
1225 *
1226 * Configure the sca waitstates.
1227 * Configure the global interrupt registers.
1228 * Enable master dma enable.
1229 */
1230 static void
1231 ar_init_sca(struct ar_hardc *hc, int scano)
1232 {
1233 sca_regs *sca;
1234
1235 sca = hc->sca[scano];
1236 if(hc->bustype == AR_BUS_ISA)
1237 ARC_SET_SCA(hc, scano);
1238
1239 /*
1240 * Do the wait registers.
1241 * Set everything to 0 wait states.
1242 */
1243 sca->pabr0 = 0;
1244 sca->pabr1 = 0;
1245 sca->wcrl = 0;
1246 sca->wcrm = 0;
1247 sca->wcrh = 0;
1248
1249 /*
1250 * Configure the interrupt registers.
1251 * Most are cleared until the interface is configured.
1252 */
1253 sca->ier0 = 0x00; /* MSCI interrupts... Not used with dma. */
1254 sca->ier1 = 0x00; /* DMAC interrupts */
1255 sca->ier2 = 0x00; /* TIMER interrupts... Not used yet. */
1256 sca->itcr = 0x00; /* Use ivr and no intr ack */
1257 sca->ivr = 0x40; /* Fill in the interrupt vector. */
1258 sca->imvr = 0x40;
1259
1260 /*
1261 * Configure the timers.
1262 * XXX Later
1263 */
1264
1265
1266 /*
1267 * Set the DMA channel priority to rotate between
1268 * all four channels.
1269 *
1270 * Enable all dma channels.
1271 */
1272 if(hc->bustype == AR_BUS_PCI) {
1273 u_char *t;
1274
1275 /*
1276 * Stupid problem with the PCI interface chip that break
1277 * things.
1278 * XXX
1279 */
1280 t = (u_char *)sca;
1281 t[AR_PCI_SCA_PCR] = SCA_PCR_PR2;
1282 t[AR_PCI_SCA_DMER] = SCA_DMER_EN;
1283 } else {
1284 sca->pcr = SCA_PCR_PR2;
1285 sca->dmer = SCA_DMER_EN;
1286 }
1287 }
1288
1289
1290 /*
1291 * Configure the msci
1292 *
1293 * NOTE: The serial port configuration is hardcoded at the moment.
1294 */
1295 static void
1296 ar_init_msci(struct ar_softc *sc)
1297 {
1298 msci_channel *msci;
1299
1300 msci = &sc->sca->msci[sc->scachan];
1301
1302 if(sc->hc->bustype == AR_BUS_ISA)
1303 ARC_SET_SCA(sc->hc, sc->scano);
1304
1305 msci->cmd = SCA_CMD_RESET;
1306
1307 msci->md0 = SCA_MD0_CRC_1 |
1308 SCA_MD0_CRC_CCITT |
1309 SCA_MD0_CRC_ENABLE |
1310 SCA_MD0_MODE_HDLC;
1311 msci->md1 = SCA_MD1_NOADDRCHK;
1312 msci->md2 = SCA_MD2_DUPLEX | SCA_MD2_NRZ;
1313
1314 /*
1315 * Acording to the manual I should give a reset after changing the
1316 * mode registers.
1317 */
1318 msci->cmd = SCA_CMD_RXRESET;
1319 msci->ctl = SCA_CTL_IDLPAT | SCA_CTL_UDRNC | SCA_CTL_RTS;
1320
1321 /*
1322 * For now all interfaces are programmed to use the RX clock for
1323 * the TX clock.
1324 */
1325 switch(sc->hc->interface[sc->subunit]) {
1326 case AR_IFACE_V_35:
1327 msci->rxs = SCA_RXS_CLK_RXC0 | SCA_RXS_DIV1;
1328 msci->txs = SCA_TXS_CLK_TXC | SCA_TXS_DIV1;
1329 break;
1330 case AR_IFACE_X_21:
1331 case AR_IFACE_EIA_530:
1332 case AR_IFACE_COMBO:
1333 msci->rxs = SCA_RXS_CLK_RXC0 | SCA_RXS_DIV1;
1334 msci->txs = SCA_TXS_CLK_RX | SCA_TXS_DIV1;
1335 }
1336
1337 msci->tmc = 153; /* This give 64k for loopback */
1338
1339 /* XXX
1340 * Disable all interrupts for now. I think if you are using
1341 * the dmac you don't use these interrupts.
1342 */
1343 msci->ie0 = 0;
1344 msci->ie1 = 0x0C; /* XXX CTS and DCD (DSR on 570I) level change. */
1345 msci->ie2 = 0;
1346 msci->fie = 0;
1347
1348 msci->sa0 = 0;
1349 msci->sa1 = 0;
1350
1351 msci->idl = 0x7E; /* XXX This is what cisco does. */
1352
1353 /*
1354 * This is what the ARNET diags use.
1355 */
1356 msci->rrc = 0x0E;
1357 msci->trc0 = 0x12;
1358 msci->trc1 = 0x1F;
1359 }
1360
1361 /*
1362 * Configure the rx dma controller.
1363 */
1364 static void
1365 ar_init_rx_dmac(struct ar_softc *sc)
1366 {
1367 dmac_channel *dmac;
1368 sca_descriptor *rxd;
1369 u_int rxbuf;
1370 u_int rxda;
1371 u_int rxda_d;
1372 int x = 0;
1373
1374 dmac = &sc->sca->dmac[DMAC_RXCH(sc->scachan)];
1375
1376 if(sc->hc->bustype == AR_BUS_ISA)
1377 ARC_SET_MEM(sc->hc, sc->rxdesc);
1378
1379 rxd = (sca_descriptor *)(sc->hc->mem_start + (sc->rxdesc&sc->hc->winmsk));
1380 rxda_d = (u_int)sc->hc->mem_start - (sc->rxdesc & ~sc->hc->winmsk);
1381
1382 for(rxbuf=sc->rxstart;rxbuf<sc->rxend;rxbuf += AR_BUF_SIZ, rxd++) {
1383 rxda = (u_int)&rxd[1] - rxda_d;
1384 rxd->cp = (u_short)(rxda & 0xfffful);
1385
1386 x++;
1387 if(x < 6)
1388 TRC(kprintf("Descrp %p, data pt %x, data %x, ",
1389 rxd, rxda, rxbuf));
1390
1391 rxd->bp = (u_short)(rxbuf & 0xfffful);
1392 rxd->bpb = (u_char)((rxbuf >> 16) & 0xff);
1393 rxd->len = 0;
1394 rxd->stat = 0xff; /* The sca write here when it is finished. */
1395
1396 if(x < 6)
1397 TRC(kprintf("bpb %x, bp %x.\n", rxd->bpb, rxd->bp));
1398 }
1399 rxd--;
1400 rxd->cp = (u_short)(sc->rxdesc & 0xfffful);
1401
1402 sc->rxhind = 0;
1403
1404 if(sc->hc->bustype == AR_BUS_ISA)
1405 ARC_SET_SCA(sc->hc, sc->scano);
1406
1407 dmac->dsr = 0; /* Disable DMA transfer */
1408 dmac->dcr = SCA_DCR_ABRT;
1409
1410 /* XXX maybe also SCA_DMR_CNTE */
1411 dmac->dmr = SCA_DMR_TMOD | SCA_DMR_NF;
1412 dmac->bfl = AR_BUF_SIZ;
1413
1414 dmac->cda = (u_short)(sc->rxdesc & 0xffff);
1415 dmac->sarb = (u_char)((sc->rxdesc >> 16) & 0xff);
1416
1417 rxd = (sca_descriptor *)sc->rxstart;
1418 dmac->eda = (u_short)((u_int)&rxd[sc->rxmax - 1] & 0xffff);
1419
1420 dmac->dir = 0xF0;
1421
1422 dmac->dsr = SCA_DSR_DE;
1423 }
1424
1425 /*
1426 * Configure the TX DMA descriptors.
1427 * Initialize the needed values and chain the descriptors.
1428 */
1429 static void
1430 ar_init_tx_dmac(struct ar_softc *sc)
1431 {
1432 dmac_channel *dmac;
1433 struct buf_block *blkp;
1434 int blk;
1435 sca_descriptor *txd;
1436 u_int txbuf;
1437 u_int txda;
1438 u_int txda_d;
1439
1440 dmac = &sc->sca->dmac[DMAC_TXCH(sc->scachan)];
1441
1442 if(sc->hc->bustype == AR_BUS_ISA)
1443 ARC_SET_MEM(sc->hc, sc->block[0].txdesc);
1444
1445 for(blk = 0; blk < AR_TX_BLOCKS; blk++) {
1446 blkp = &sc->block[blk];
1447 txd = (sca_descriptor *)(sc->hc->mem_start +
1448 (blkp->txdesc&sc->hc->winmsk));
1449 txda_d = (u_int)sc->hc->mem_start -
1450 (blkp->txdesc & ~sc->hc->winmsk);
1451
1452 txbuf=blkp->txstart;
1453 for(;txbuf<blkp->txend;txbuf += AR_BUF_SIZ, txd++) {
1454 txda = (u_int)&txd[1] - txda_d;
1455 txd->cp = (u_short)(txda & 0xfffful);
1456
1457 txd->bp = (u_short)(txbuf & 0xfffful);
1458 txd->bpb = (u_char)((txbuf >> 16) & 0xff);
1459 TRC(kprintf("ar%d: txbuf %x, bpb %x, bp %x\n",
1460 sc->unit, txbuf, txd->bpb, txd->bp));
1461 txd->len = 0;
1462 txd->stat = 0;
1463 }
1464 txd--;
1465 txd->cp = (u_short)(blkp->txdesc & 0xfffful);
1466
1467 blkp->txtail = (u_int)txd - (u_int)sc->hc->mem_start;
1468 TRC(kprintf("TX Descriptors start %x, end %x.\n",
1469 blkp->txdesc,
1470 blkp->txtail));
1471 }
1472
1473 if(sc->hc->bustype == AR_BUS_ISA)
1474 ARC_SET_SCA(sc->hc, sc->scano);
1475
1476 dmac->dsr = 0; /* Disable DMA */
1477 dmac->dcr = SCA_DCR_ABRT;
1478 dmac->dmr = SCA_DMR_TMOD | SCA_DMR_NF;
1479 dmac->dir = SCA_DIR_EOT | SCA_DIR_BOF | SCA_DIR_COF;
1480
1481 dmac->sarb = (u_char)((sc->block[0].txdesc >> 16) & 0xff);
1482 }
1483
1484
1485 /*
1486 * Look through the descriptors to see if there is a complete packet
1487 * available. Stop if we get to where the sca is busy.
1488 *
1489 * Return the length and status of the packet.
1490 * Return nonzero if there is a packet available.
1491 *
1492 * NOTE:
1493 * It seems that we get the interrupt a bit early. The updateing of
1494 * descriptor values is not always completed when this is called.
1495 */
1496 static int
1497 ar_packet_avail(struct ar_softc *sc,
1498 int *len,
1499 u_char *rxstat)
1500 {
1501 dmac_channel *dmac;
1502 sca_descriptor *rxdesc;
1503 sca_descriptor *endp;
1504 sca_descriptor *cda;
1505
1506 if(sc->hc->bustype == AR_BUS_ISA)
1507 ARC_SET_SCA(sc->hc, sc->scano);
1508 dmac = &sc->sca->dmac[DMAC_RXCH(sc->scachan)];
1509 cda = (sca_descriptor *)(sc->hc->mem_start +
1510 ((((u_int)dmac->sarb << 16) + dmac->cda) & sc->hc->winmsk));
1511
1512 if(sc->hc->bustype == AR_BUS_ISA)
1513 ARC_SET_MEM(sc->hc, sc->rxdesc);
1514 rxdesc = (sca_descriptor *)
1515 (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
1516 endp = rxdesc;
1517 rxdesc = &rxdesc[sc->rxhind];
1518 endp = &endp[sc->rxmax];
1519
1520 *len = 0;
1521
1522 while(rxdesc != cda) {
1523 *len += rxdesc->len;
1524
1525 if(rxdesc->stat & SCA_DESC_EOM) {
1526 *rxstat = rxdesc->stat;
1527 TRC(kprintf("ar%d: PKT AVAIL len %d, %x.\n",
1528 sc->unit, *len, *rxstat));
1529 return (1);
1530 }
1531
1532 rxdesc++;
1533 if(rxdesc == endp)
1534 rxdesc = (sca_descriptor *)
1535 (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
1536 }
1537
1538 *len = 0;
1539 *rxstat = 0;
1540 return (0);
1541 }
1542
1543
1544 /*
1545 * Copy a packet from the on card memory into a provided mbuf.
1546 * Take into account that buffers wrap and that a packet may
1547 * be larger than a buffer.
1548 */
1549 static void
1550 ar_copy_rxbuf(struct mbuf *m,
1551 struct ar_softc *sc,
1552 int len)
1553 {
1554 sca_descriptor *rxdesc;
1555 u_int rxdata;
1556 u_int rxmax;
1557 u_int off = 0;
1558 u_int tlen;
1559
1560 rxdata = sc->rxstart + (sc->rxhind * AR_BUF_SIZ);
1561 rxmax = sc->rxstart + (sc->rxmax * AR_BUF_SIZ);
1562
1563 rxdesc = (sca_descriptor *)
1564 (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
1565 rxdesc = &rxdesc[sc->rxhind];
1566
1567 while(len) {
1568 tlen = (len < AR_BUF_SIZ) ? len : AR_BUF_SIZ;
1569 if(sc->hc->bustype == AR_BUS_ISA)
1570 ARC_SET_MEM(sc->hc, rxdata);
1571 bcopy(sc->hc->mem_start + (rxdata & sc->hc->winmsk),
1572 mtod(m, caddr_t) + off,
1573 tlen);
1574
1575 off += tlen;
1576 len -= tlen;
1577
1578 if(sc->hc->bustype == AR_BUS_ISA)
1579 ARC_SET_MEM(sc->hc, sc->rxdesc);
1580 rxdesc->len = 0;
1581 rxdesc->stat = 0xff;
1582
1583 rxdata += AR_BUF_SIZ;
1584 rxdesc++;
1585 if(rxdata == rxmax) {
1586 rxdata = sc->rxstart;
1587 rxdesc = (sca_descriptor *)
1588 (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
1589 }
1590 }
1591 }
1592
1593 /*
1594 * If single is set, just eat a packet. Otherwise eat everything up to
1595 * where cda points. Update pointers to point to the next packet.
1596 */
1597 static void
1598 ar_eat_packet(struct ar_softc *sc, int single)
1599 {
1600 dmac_channel *dmac;
1601 sca_descriptor *rxdesc;
1602 sca_descriptor *endp;
1603 sca_descriptor *cda;
1604 int loopcnt = 0;
1605 u_char stat;
1606
1607 if(sc->hc->bustype == AR_BUS_ISA)
1608 ARC_SET_SCA(sc->hc, sc->scano);
1609 dmac = &sc->sca->dmac[DMAC_RXCH(sc->scachan)];
1610 cda = (sca_descriptor *)(sc->hc->mem_start +
1611 ((((u_int)dmac->sarb << 16) + dmac->cda) & sc->hc->winmsk));
1612
1613 /*
1614 * Loop until desc->stat == (0xff || EOM)
1615 * Clear the status and length in the descriptor.
1616 * Increment the descriptor.
1617 */
1618 if(sc->hc->bustype == AR_BUS_ISA)
1619 ARC_SET_MEM(sc->hc, sc->rxdesc);
1620 rxdesc = (sca_descriptor *)
1621 (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
1622 endp = rxdesc;
1623 rxdesc = &rxdesc[sc->rxhind];
1624 endp = &endp[sc->rxmax];
1625
1626 while(rxdesc != cda) {
1627 loopcnt++;
1628 if(loopcnt > sc->rxmax) {
1629 kprintf("ar%d: eat pkt %d loop, cda %p, "
1630 "rxdesc %p, stat %x.\n",
1631 sc->unit,
1632 loopcnt,
1633 (void *)cda,
1634 (void *)rxdesc,
1635 rxdesc->stat);
1636 break;
1637 }
1638
1639 stat = rxdesc->stat;
1640
1641 rxdesc->len = 0;
1642 rxdesc->stat = 0xff;
1643
1644 rxdesc++;
1645 sc->rxhind++;
1646 if(rxdesc == endp) {
1647 rxdesc = (sca_descriptor *)
1648 (sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
1649 sc->rxhind = 0;
1650 }
1651
1652 if(single && (stat == SCA_DESC_EOM))
1653 break;
1654 }
1655
1656 /*
1657 * Update the eda to the previous descriptor.
1658 */
1659 if(sc->hc->bustype == AR_BUS_ISA)
1660 ARC_SET_SCA(sc->hc, sc->scano);
1661
1662 rxdesc = (sca_descriptor *)sc->rxdesc;
1663 rxdesc = &rxdesc[(sc->rxhind + sc->rxmax - 2 ) % sc->rxmax];
1664
1665 sc->sca->dmac[DMAC_RXCH(sc->scachan)].eda =
1666 (u_short)((u_int)rxdesc & 0xffff);
1667 }
1668
1669
1670 /*
1671 * While there is packets available in the rx buffer, read them out
1672 * into mbufs and ship them off.
1673 */
1674 static void
1675 ar_get_packets(struct ar_softc *sc)
1676 {
1677 sca_descriptor *rxdesc;
1678 struct mbuf *m = NULL;
1679 int i;
1680 int len;
1681 u_char rxstat;
1682 #ifdef NETGRAPH
1683 int error;
1684 #endif
1685
1686 while(ar_packet_avail(sc, &len, &rxstat)) {
1687 TRC(kprintf("apa: len %d, rxstat %x\n", len, rxstat));
1688 if(((rxstat & SCA_DESC_ERRORS) == 0) && (len < MCLBYTES)) {
1689 m = m_getl(len, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL);
1690 if(m == NULL) {
1691 /* eat packet if get mbuf fail!! */
1692 ar_eat_packet(sc, 1);
1693 continue;
1694 }
1695 #ifdef NETGRAPH
1696 m->m_pkthdr.rcvif = NULL;
1697 sc->inbytes += len;
1698 sc->inlast = 0;
1699 #else
1700 m->m_pkthdr.rcvif = &sc->ifsppp.pp_if;
1701 #endif
1702 m->m_pkthdr.len = m->m_len = len;
1703 ar_copy_rxbuf(m, sc, len);
1704 #ifdef NETGRAPH
1705 NG_SEND_DATA_ONLY(error, sc->hook, m);
1706 sc->ipackets++;
1707 #else
1708 BPF_MTAP(&sc->ifsppp.pp_if, m);
1709 sppp_input(&sc->ifsppp.pp_if, m);
1710 sc->ifsppp.pp_if.if_ipackets++;
1711 #endif
1712 /*
1713 * Update the eda to the previous descriptor.
1714 */
1715 i = (len + AR_BUF_SIZ - 1) / AR_BUF_SIZ;
1716 sc->rxhind = (sc->rxhind + i) % sc->rxmax;
1717
1718 if(sc->hc->bustype == AR_BUS_ISA)
1719 ARC_SET_SCA(sc->hc, sc->scano);
1720
1721 rxdesc = (sca_descriptor *)sc->rxdesc;
1722 rxdesc =
1723 &rxdesc[(sc->rxhind + sc->rxmax - 2 ) % sc->rxmax];
1724
1725 sc->sca->dmac[DMAC_RXCH(sc->scachan)].eda =
1726 (u_short)((u_int)rxdesc & 0xffff);
1727 } else {
1728 int tries = 5;
1729
1730 while((rxstat == 0xff) && --tries)
1731 ar_packet_avail(sc, &len, &rxstat);
1732
1733 /*
1734 * It look like we get an interrupt early
1735 * sometimes and then the status is not
1736 * filled in yet.
1737 */
1738 if(tries && (tries != 5))
1739 continue;
1740
1741 ar_eat_packet(sc, 1);
1742
1743 #ifndef NETGRAPH
1744 sc->ifsppp.pp_if.if_ierrors++;
1745 #else /* NETGRAPH */
1746 sc->ierrors[0]++;
1747 #endif /* NETGRAPH */
1748
1749 if(sc->hc->bustype == AR_BUS_ISA)
1750 ARC_SET_SCA(sc->hc, sc->scano);
1751
1752 TRCL(kprintf("ar%d: Receive error chan %d, "
1753 "stat %x, msci st3 %x,"
1754 "rxhind %d, cda %x, eda %x.\n",
1755 sc->unit,
1756 sc->scachan,
1757 rxstat,
1758 sc->sca->msci[sc->scachan].st3,
1759 sc->rxhind,
1760 sc->sca->dmac[
1761 DMAC_RXCH(sc->scachan)].cda,
1762 sc->sca->dmac[
1763 DMAC_RXCH(sc->scachan)].eda));
1764 }
1765 }
1766 }
1767
1768
1769 /*
1770 * All DMA interrupts come here.
1771 *
1772 * Each channel has two interrupts.
1773 * Interrupt A for errors and Interrupt B for normal stuff like end
1774 * of transmit or receive dmas.
1775 */
1776 static void
1777 ar_dmac_intr(struct ar_hardc *hc, int scano, u_char isr1)
1778 {
1779 u_char dsr;
1780 u_char dotxstart = isr1;
1781 int mch;
1782 struct ar_softc *sc;
1783 sca_regs *sca;
1784 dmac_channel *dmac;
1785
1786 sca = hc->sca[scano];
1787 mch = 0;
1788 /*
1789 * Shortcut if there is no interrupts for dma channel 0 or 1
1790 */
1791 if((isr1 & 0x0F) == 0) {
1792 mch = 1;
1793 isr1 >>= 4;
1794 }
1795
1796 do {
1797 sc = &hc->sc[mch + (NCHAN * scano)];
1798
1799 /*
1800 * Transmit channel
1801 */
1802 if(isr1 & 0x0C) {
1803 dmac = &sca->dmac[DMAC_TXCH(mch)];
1804
1805 if(hc->bustype == AR_BUS_ISA)
1806 ARC_SET_SCA(hc, scano);
1807
1808 dsr = dmac->dsr;
1809 dmac->dsr = dsr;
1810
1811 /* Counter overflow */
1812 if(dsr & SCA_DSR_COF) {
1813 kprintf("ar%d: TX DMA Counter overflow, "
1814 "txpacket no %lu.\n",
1815 sc->unit,
1816 #ifndef NETGRAPH
1817 sc->ifsppp.pp_if.if_opackets);
1818 sc->ifsppp.pp_if.if_oerrors++;
1819 #else /* NETGRAPH */
1820 sc->opackets);
1821 sc->oerrors++;
1822 #endif /* NETGRAPH */
1823 }
1824
1825 /* Buffer overflow */
1826 if(dsr & SCA_DSR_BOF) {
1827 kprintf("ar%d: TX DMA Buffer overflow, "
1828 "txpacket no %lu, dsr %02x, "
1829 "cda %04x, eda %04x.\n",
1830 sc->unit,
1831 #ifndef NETGRAPH
1832 sc->ifsppp.pp_if.if_opackets,
1833 #else /* NETGRAPH */
1834 sc->opackets,
1835 #endif /* NETGRAPH */
1836 dsr,
1837 dmac->cda,
1838 dmac->eda);
1839 #ifndef NETGRAPH
1840 sc->ifsppp.pp_if.if_oerrors++;
1841 #else /* NETGRAPH */
1842 sc->oerrors++;
1843 #endif /* NETGRAPH */
1844 }
1845
1846 /* End of Transfer */
1847 if(dsr & SCA_DSR_EOT) {
1848 /*
1849 * This should be the most common case.
1850 *
1851 * Clear the IFF_OACTIVE flag.
1852 *
1853 * Call arstart to start a new transmit if
1854 * there is data to transmit.
1855 */
1856 sc->xmit_busy = 0;
1857 #ifndef NETGRAPH
1858 sc->ifsppp.pp_if.if_flags &= ~IFF_OACTIVE;
1859 sc->ifsppp.pp_if.if_timer = 0;
1860 #else /* NETGRAPH */
1861 /* XXX c->ifsppp.pp_if.if_flags &= ~IFF_OACTIVE; */
1862 sc->out_dog = 0; /* XXX */
1863 #endif /* NETGRAPH */
1864
1865 if(sc->txb_inuse && --sc->txb_inuse)
1866 ar_xmit(sc);
1867 }
1868 }
1869
1870 /*
1871 * Receive channel
1872 */
1873 if(isr1 & 0x03) {
1874 dmac = &sca->dmac[DMAC_RXCH(mch)];
1875
1876 if(hc->bustype == AR_BUS_ISA)
1877 ARC_SET_SCA(hc, scano);
1878
1879 dsr = dmac->dsr;
1880 dmac->dsr = dsr;
1881
1882 TRC(kprintf("AR: RX DSR %x\n", dsr));
1883
1884 /* End of frame */
1885 if(dsr & SCA_DSR_EOM) {
1886 TRC(int tt = sc->ifsppp.pp_if.if_ipackets;)
1887 TRC(int ind = sc->rxhind;)
1888
1889 ar_get_packets(sc);
1890 #ifndef NETGRAPH
1891 #define IPACKETS sc->ifsppp.pp_if.if_ipackets
1892 #else /* NETGRAPH */
1893 #define IPACKETS sc->ipackets
1894 #endif /* NETGRAPH */
1895 TRC(if(tt == IPACKETS) {
1896 sca_descriptor *rxdesc;
1897 int i;
1898
1899 if(hc->bustype == AR_BUS_ISA)
1900 ARC_SET_SCA(hc, scano);
1901 kprintf("AR: RXINTR isr1 %x, dsr %x, "
1902 "no data %d pkts, orxhind %d.\n",
1903 dotxstart,
1904 dsr,
1905 tt,
1906 ind);
1907 kprintf("AR: rxdesc %x, rxstart %x, "
1908 "rxend %x, rxhind %d, "
1909 "rxmax %d.\n",
1910 sc->rxdesc,
1911 sc->rxstart,
1912 sc->rxend,
1913 sc->rxhind,
1914 sc->rxmax);
1915 kprintf("AR: cda %x, eda %x.\n",
1916 dmac->cda,
1917 dmac->eda);
1918
1919 if(sc->hc->bustype == AR_BUS_ISA)
1920 ARC_SET_MEM(sc->hc,
1921 sc->rxdesc);
1922 rxdesc = (sca_descriptor *)
1923 (sc->hc->mem_start +
1924 (sc->rxdesc & sc->hc->winmsk));
1925 rxdesc = &rxdesc[sc->rxhind];
1926 for(i=0;i<3;i++,rxdesc++)
1927 kprintf("AR: rxdesc->stat %x, "
1928 "len %d.\n",
1929 rxdesc->stat,
1930 rxdesc->len);
1931 })
1932 }
1933
1934 /* Counter overflow */
1935 if(dsr & SCA_DSR_COF) {
1936 kprintf("ar%d: RX DMA Counter overflow, "
1937 "rxpkts %lu.\n",
1938 sc->unit,
1939 #ifndef NETGRAPH
1940 sc->ifsppp.pp_if.if_ipackets);
1941 sc->ifsppp.pp_if.if_ierrors++;
1942 #else /* NETGRAPH */
1943 sc->ipackets);
1944 sc->ierrors[1]++;
1945 #endif /* NETGRAPH */
1946 }
1947
1948 /* Buffer overflow */
1949 if(dsr & SCA_DSR_BOF) {
1950 if(hc->bustype == AR_BUS_ISA)
1951 ARC_SET_SCA(hc, scano);
1952 kprintf("ar%d: RX DMA Buffer overflow, "
1953 "rxpkts %lu, rxind %d, "
1954 "cda %x, eda %x, dsr %x.\n",
1955 sc->unit,
1956 #ifndef NETGRAPH
1957 sc->ifsppp.pp_if.if_ipackets,
1958 #else /* NETGRAPH */
1959 sc->ipackets,
1960 #endif /* NETGRAPH */
1961 sc->rxhind,
1962 dmac->cda,
1963 dmac->eda,
1964 dsr);
1965 /*
1966 * Make sure we eat as many as possible.
1967 * Then get the system running again.
1968 */
1969 ar_eat_packet(sc, 0);
1970 #ifndef NETGRAPH
1971 sc->ifsppp.pp_if.if_ierrors++;
1972 #else /* NETGRAPH */
1973 sc->ierrors[2]++;
1974 #endif /* NETGRAPH */
1975 if(hc->bustype == AR_BUS_ISA)
1976 ARC_SET_SCA(hc, scano);
1977 sca->msci[mch].cmd = SCA_CMD_RXMSGREJ;
1978 dmac->dsr = SCA_DSR_DE;
1979
1980 TRC(kprintf("ar%d: RX DMA Buffer overflow, "
1981 "rxpkts %lu, rxind %d, "
1982 "cda %x, eda %x, dsr %x. After\n",
1983 sc->unit,
1984 sc->ifsppp.pp_if.if_ipackets,
1985 sc->rxhind,
1986 dmac->cda,
1987 dmac->eda,
1988 dmac->dsr);)
1989 }
1990
1991 /* End of Transfer */
1992 if(dsr & SCA_DSR_EOT) {
1993 /*
1994 * If this happen, it means that we are
1995 * receiving faster than what the processor
1996 * can handle.
1997 *
1998 * XXX We should enable the dma again.
1999 */
2000 kprintf("ar%d: RX End of transfer, rxpkts %lu.\n",
2001 sc->unit,
2002 #ifndef NETGRAPH
2003 sc->ifsppp.pp_if.if_ipackets);
2004 sc->ifsppp.pp_if.if_ierrors++;
2005 #else /* NETGRAPH */
2006 sc->ipackets);
2007 sc->ierrors[3]++;
2008 #endif /* NETGRAPH */
2009 }
2010 }
2011
2012 isr1 >>= 4;
2013
2014 mch++;
2015 }while((mch<NCHAN) && isr1);
2016
2017 /*
2018 * Now that we have done all the urgent things, see if we
2019 * can fill the transmit buffers.
2020 */
2021 for(mch = 0; mch < NCHAN; mch++) {
2022 if(dotxstart & 0x0C) {
2023 sc = &hc->sc[mch + (NCHAN * scano)];
2024 #ifndef NETGRAPH
2025 arstart(&sc->ifsppp.pp_if);
2026 #else /* NETGRAPH */
2027 arstart(sc);
2028 #endif /* NETGRAPH */
2029 }
2030 dotxstart >>= 4;
2031 }
2032 }
2033
2034 static void
2035 ar_msci_intr(struct ar_hardc *hc, int scano, u_char isr0)
2036 {
2037 kprintf("arc%d: ARINTR: MSCI\n", hc->cunit);
2038 }
2039
2040 static void
2041 ar_timer_intr(struct ar_hardc *hc, int scano, u_char isr2)
2042 {
2043 kprintf("arc%d: ARINTR: TIMER\n", hc->cunit);
2044 }
2045
2046
2047 #ifdef NETGRAPH
2048 /*****************************************
2049 * Device timeout/watchdog routine.
2050 * called once per second.
2051 * checks to see that if activity was expected, that it hapenned.
2052 * At present we only look to see if expected output was completed.
2053 */
2054 static void
2055 ngar_watchdog_frame(void * arg)
2056 {
2057 struct ar_softc * sc = arg;
2058 int speed;
2059
2060 if (sc->running == 0) {
2061 return; /* if we are not running let timeouts die */
2062 }
2063
2064 lwkt_serialize_enter(&ar_serializer);
2065
2066 /*
2067 * calculate the apparent throughputs
2068 * XXX a real hack
2069 */
2070 speed = sc->inbytes - sc->lastinbytes;
2071 sc->lastinbytes = sc->inbytes;
2072 if ( sc->inrate < speed )
2073 sc->inrate = speed;
2074 speed = sc->outbytes - sc->lastoutbytes;
2075 sc->lastoutbytes = sc->outbytes;
2076 if ( sc->outrate < speed )
2077 sc->outrate = speed;
2078 sc->inlast++;
2079
2080 if ((sc->inlast > QUITE_A_WHILE)
2081 && (sc->out_deficit > LOTS_OF_PACKETS)) {
2082 log(LOG_ERR, "ar%d: No response from remote end\n", sc->unit);
2083
2084 ar_down(sc);
2085 ar_up(sc);
2086 sc->inlast = sc->out_deficit = 0;
2087 } else if ( sc->xmit_busy ) { /* no TX -> no TX timeouts */
2088 if (sc->out_dog == 0) {
2089 log(LOG_ERR, "ar%d: Transmit failure.. no clock?\n",
2090 sc->unit);
2091
2092 arwatchdog(sc);
2093 #if 0
2094 ar_down(sc);
2095 ar_up(sc);
2096 #endif
2097 sc->inlast = sc->out_deficit = 0;
2098 } else {
2099 sc->out_dog--;
2100 }
2101 }
2102 lwkt_serialize_exit(&ar_serializer);
2103 callout_reset(&sc->timer, hz, ngar_watchdog_frame, sc);
2104 }
2105
2106 /***********************************************************************
2107 * This section contains the methods for the Netgraph interface
2108 ***********************************************************************/
2109 /*
2110 * It is not possible or allowable to create a node of this type.
2111 * If the hardware exists, it will already have created it.
2112 */
2113 static int
2114 ngar_constructor(node_p *nodep)
2115 {
2116 return (EINVAL);
2117 }
2118
2119 /*
2120 * give our ok for a hook to be added...
2121 * If we are not running this should kick the device into life.
2122 * The hook's private info points to our stash of info about that
2123 * channel.
2124 */
2125 static int
2126 ngar_newhook(node_p node, hook_p hook, const char *name)
2127 {
2128 struct ar_softc * sc = NG_NODE_PRIVATE(node);
2129
2130 /*
2131 * check if it's our friend the debug hook
2132 */
2133 if (strcmp(name, NG_AR_HOOK_DEBUG) == 0) {
2134 NG_HOOK_SET_PRIVATE(hook, NULL); /* paranoid */
2135 sc->debug_hook = hook;
2136 return (0);
2137 }
2138
2139 /*
2140 * Check for raw mode hook.
2141 */
2142 if (strcmp(name, NG_AR_HOOK_RAW) != 0) {
2143 return (EINVAL);
2144 }
2145 NG_HOOK_SET_PRIVATE(hook, sc);
2146 sc->hook = hook;
2147 sc->datahooks++;
2148 ar_up(sc);
2149 return (0);
2150 }
2151
2152 /*
2153 * incoming messages.
2154 * Just respond to the generic TEXT_STATUS message
2155 */
2156 static int
2157 ngar_rcvmsg(node_p node, struct ng_mesg *msg, const char *retaddr,
2158 struct ng_mesg **rptr)
2159 {
2160 struct ar_softc *sc;
2161 int error = 0;
2162 struct ng_mesg *resp = NULL;
2163
2164 sc = NG_NODE_PRIVATE(node);
2165 switch (msg->header.typecookie) {
2166 case NG_AR_COOKIE:
2167 error = EINVAL;
2168 break;
2169 case NGM_GENERIC_COOKIE:
2170 switch(msg->header.cmd) {
2171 case NGM_TEXT_STATUS: {
2172 char *arg;
2173 int pos = 0;
2174
2175 int resplen = sizeof(struct ng_mesg) + 512;
2176 NG_MKRESPONSE(resp, msg, resplen, M_INTWAIT);
2177 if (resp == NULL) {
2178 error = ENOMEM;
2179 break;
2180 }
2181 arg = (resp)->data;
2182 pos = ksprintf(arg, "%ld bytes in, %ld bytes out\n"
2183 "highest rate seen: %ld B/S in, %ld B/S out\n",
2184 sc->inbytes, sc->outbytes,
2185 sc->inrate, sc->outrate);
2186 pos += ksprintf(arg + pos,
2187 "%ld output errors\n",
2188 sc->oerrors);
2189 pos += ksprintf(arg + pos,
2190 "ierrors = %ld, %ld, %ld, %ld\n",
2191 sc->ierrors[0],
2192 sc->ierrors[1],
2193 sc->ierrors[2],
2194 sc->ierrors[3]);
2195
2196 (resp)->header.arglen = pos + 1;
2197 break;
2198 }
2199 default:
2200 error = EINVAL;
2201 break;
2202 }
2203 break;
2204 default:
2205 error = EINVAL;
2206 break;
2207 }
2208 /* Take care of synchronous response, if any */
2209 NG_RESPOND_MSG(error, node, retaddr, resp, rptr);
2210 NG_FREE_MSG(msg);
2211 return (error);
2212 }
2213
2214 /*
2215 * get data from another node and transmit it to the correct channel
2216 */
2217 static int
2218 ngar_rcvdata(hook_p hook, struct mbuf *m, meta_p meta)
2219 {
2220 int error = 0;
2221 struct ar_softc * sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
2222 struct ifqueue *xmitq_p;
2223
2224 /*
2225 * data doesn't come in from just anywhere (e.g control hook)
2226 */
2227 if ( NG_HOOK_PRIVATE(hook) == NULL) {
2228 error = ENETDOWN;
2229 goto bad;
2230 }
2231
2232 /*
2233 * Now queue the data for when it can be sent
2234 */
2235 if (meta && meta->priority > 0)
2236 xmitq_p = (&sc->xmitq_hipri);
2237 else
2238 xmitq_p = (&sc->xmitq);
2239
2240 if (IF_QFULL(xmitq_p)) {
2241 IF_DROP(xmitq_p);
2242
2243 error = ENOBUFS;
2244 goto bad;
2245 }
2246 IF_ENQUEUE(xmitq_p, m);
2247 arstart(sc);
2248
2249 return (0);
2250
2251 bad:
2252 /*
2253 * It was an error case.
2254 * check if we need to free the mbuf, and then return the error
2255 */
2256 NG_FREE_DATA(m, meta);
2257 return (error);
2258 }
2259
2260 /*
2261 * do local shutdown processing..
2262 * this node will refuse to go away, unless the hardware says to..
2263 * don't unref the node, or remove our name. just clear our links up.
2264 */
2265 static int
2266 ngar_shutdown(node_p node)
2267 {
2268 struct ar_softc * sc = NG_NODE_PRIVATE(node);
2269
2270 ar_down(sc);
2271 NG_NODE_UNREF(node);
2272 /* XXX need to drain the output queues! */
2273
2274 /* The node is dead, long live the node! */
2275 /* stolen from the attach routine */
2276 if (ng_make_node_common(&typestruct, &sc->node) != 0)
2277 return (0);
2278 ksprintf(sc->nodename, "%s%d", NG_AR_NODE_TYPE, sc->unit);
2279 if (ng_name_node(sc->node, sc->nodename)) {
2280 sc->node = NULL;
2281 kprintf("node naming failed\n");
2282 NG_NODE_UNREF(sc->node); /* node dissappears */
2283 return (0);
2284 }
2285 NG_NODE_SET_PRIVATE(sc->node, sc);
2286 sc->running = 0;
2287 return (0);
2288 }
2289
2290 /* already linked */
2291 static int
2292 ngar_connect(hook_p hook)
2293 {
2294 /* be really amiable and just say "YUP that's OK by me! " */
2295 return (0);
2296 }
2297
2298 /*
2299 * notify on hook disconnection (destruction)
2300 *
2301 * Invalidate the private data associated with this dlci.
2302 * For this type, removal of the last link resets tries to destroy the node.
2303 * As the device still exists, the shutdown method will not actually
2304 * destroy the node, but reset the device and leave it 'fresh' :)
2305 *
2306 * The node removal code will remove all references except that owned by the
2307 * driver.
2308 */
2309 static int
2310 ngar_disconnect(hook_p hook)
2311 {
2312 struct ar_softc * sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
2313
2314 /*
2315 * If it's the data hook, then free resources etc.
2316 */
2317 if (NG_HOOK_PRIVATE(hook)) {
2318 sc->datahooks--;
2319 if (sc->datahooks == 0)
2320 ar_down(sc);
2321 } else {
2322 sc->debug_hook = NULL;
2323 }
2324 return (0);
2325 }
2326
2327 /*
2328 * called during bootup
2329 * or LKM loading to put this type into the list of known modules
2330 */
2331 static void
2332 ngar_init(void *ignored)
2333 {
2334 if (ng_newtype(&typestruct))
2335 kprintf("ngar install failed\n");
2336 ngar_done_init = 1;
2337 }
2338 #endif /* NETGRAPH */
2339
2340 /*
2341 ********************************* END ************************************
2342 */
DragonFly BSD