1 /* $NetBSD: pdq_ifsubr.c,v 1.38 2001/12/21 23:21:47 matt Exp $ */
2
3 /*-
4 * Copyright (c) 1995, 1996 Matt Thomas <matt@3am-software.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $NetBSD: pdq_ifsubr.c,v 1.12 1997/06/05 01:56:35 thomas Exp$
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 /*
33 * DEC PDQ FDDI Controller; code for BSD derived operating systems
34 *
35 * This module provide bus independent BSD specific O/S functions.
36 * (ie. it provides an ifnet interface to the rest of the system)
37 */
38
39
40 #define PDQ_OSSUPPORT
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/lock.h>
46 #include <sys/mutex.h>
47 #include <sys/malloc.h>
48 #include <sys/socket.h>
49 #include <sys/sockio.h>
50
51 #include <sys/module.h>
52 #include <sys/bus.h>
53
54 #include <machine/bus.h>
55 #include <machine/resource.h>
56 #include <sys/rman.h>
57
58 #include <net/if.h>
59 #include <net/if_var.h>
60 #include <net/if_arp.h>
61 #include <net/if_dl.h>
62 #include <net/if_media.h>
63 #include <net/if_types.h>
64 #include <net/fddi.h>
65
66 #include <net/bpf.h>
67
68 #include <dev/pdq/pdq_freebsd.h>
69 #include <dev/pdq/pdqreg.h>
70
71 devclass_t pdq_devclass;
72
73 static void pdq_watchdog(void *);
74
75 static void
pdq_ifstop(pdq_softc_t * sc)76 pdq_ifstop(pdq_softc_t *sc)
77 {
78
79 PDQ_IFNET(sc)->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
80 sc->sc_pdq->pdq_flags &= ~PDQ_RUNNING;
81 pdq_stop(sc->sc_pdq);
82 callout_stop(&sc->watchdog);
83 }
84
85 static void
pdq_ifinit_locked(pdq_softc_t * sc)86 pdq_ifinit_locked(pdq_softc_t *sc)
87 {
88
89 PDQ_LOCK_ASSERT(sc);
90 if (PDQ_IFNET(sc)->if_flags & IFF_UP) {
91 PDQ_IFNET(sc)->if_drv_flags |= IFF_DRV_RUNNING;
92 if (PDQ_IFNET(sc)->if_flags & IFF_PROMISC) {
93 sc->sc_pdq->pdq_flags |= PDQ_PROMISC;
94 } else {
95 sc->sc_pdq->pdq_flags &= ~PDQ_PROMISC;
96 }
97 if (PDQ_IFNET(sc)->if_flags & IFF_LINK1) {
98 sc->sc_pdq->pdq_flags |= PDQ_PASS_SMT;
99 } else {
100 sc->sc_pdq->pdq_flags &= ~PDQ_PASS_SMT;
101 }
102 sc->sc_pdq->pdq_flags |= PDQ_RUNNING;
103 pdq_run(sc->sc_pdq);
104 callout_reset(&sc->watchdog, hz, pdq_watchdog, sc);
105 } else
106 pdq_ifstop(sc);
107 }
108
109 static void
pdq_ifinit(void * arg)110 pdq_ifinit(void *arg)
111 {
112 pdq_softc_t *sc;
113
114 sc = arg;
115 PDQ_LOCK(sc);
116 pdq_ifinit_locked(sc);
117 PDQ_UNLOCK(sc);
118 }
119
120 static void
pdq_watchdog(void * arg)121 pdq_watchdog(void *arg)
122 {
123 pdq_softc_t *sc;
124 struct ifnet *ifp;
125
126 sc = arg;
127 PDQ_LOCK_ASSERT(sc);
128 callout_reset(&sc->watchdog, hz, pdq_watchdog, sc);
129 if (sc->timer == 0 || --sc->timer > 0)
130 return;
131
132 /*
133 * No progress was made on the transmit queue for PDQ_OS_TX_TRANSMIT
134 * seconds. Remove all queued packets.
135 */
136 ifp = PDQ_IFNET(sc);
137 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
138 for (;;) {
139 struct mbuf *m;
140 IFQ_DEQUEUE(&ifp->if_snd, m);
141 if (m == NULL)
142 return;
143 PDQ_OS_DATABUF_FREE(PDQ_OS_IFP_TO_SOFTC(ifp)->sc_pdq, m);
144 }
145 }
146
147 static void
pdq_ifstart_locked(struct ifnet * ifp)148 pdq_ifstart_locked(struct ifnet *ifp)
149 {
150 pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
151 struct mbuf *m;
152 int tx = 0;
153
154 PDQ_LOCK_ASSERT(sc);
155 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
156 return;
157
158 if (sc->timer == 0)
159 sc->timer = PDQ_OS_TX_TIMEOUT;
160
161 if ((sc->sc_pdq->pdq_flags & PDQ_TXOK) == 0) {
162 PDQ_IFNET(sc)->if_drv_flags |= IFF_DRV_OACTIVE;
163 return;
164 }
165 sc->sc_flags |= PDQIF_DOWNCALL;
166 for (;; tx = 1) {
167 IF_DEQUEUE(&ifp->if_snd, m);
168 if (m == NULL)
169 break;
170 #if defined(PDQ_BUS_DMA) && !defined(PDQ_BUS_DMA_NOTX)
171 if ((m->m_flags & M_HASTXDMAMAP) == 0) {
172 bus_dmamap_t map;
173 if (PDQ_OS_HDR_OFFSET != PDQ_RX_FC_OFFSET) {
174 m->m_data[0] = PDQ_FDDI_PH0;
175 m->m_data[1] = PDQ_FDDI_PH1;
176 m->m_data[2] = PDQ_FDDI_PH2;
177 }
178 if (!bus_dmamap_create(sc->sc_dmatag, m->m_pkthdr.len, 255,
179 m->m_pkthdr.len, 0, BUS_DMA_NOWAIT, &map)) {
180 if (!bus_dmamap_load_mbuf(sc->sc_dmatag, map, m,
181 BUS_DMA_WRITE|BUS_DMA_NOWAIT)) {
182 bus_dmamap_sync(sc->sc_dmatag, map, 0, m->m_pkthdr.len,
183 BUS_DMASYNC_PREWRITE);
184 M_SETCTX(m, map);
185 m->m_flags |= M_HASTXDMAMAP;
186 }
187 }
188 if ((m->m_flags & M_HASTXDMAMAP) == 0)
189 break;
190 }
191 #else
192 if (PDQ_OS_HDR_OFFSET != PDQ_RX_FC_OFFSET) {
193 m->m_data[0] = PDQ_FDDI_PH0;
194 m->m_data[1] = PDQ_FDDI_PH1;
195 m->m_data[2] = PDQ_FDDI_PH2;
196 }
197 #endif
198
199 if (pdq_queue_transmit_data(sc->sc_pdq, m) == PDQ_FALSE)
200 break;
201 }
202 if (m != NULL) {
203 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
204 IF_PREPEND(&ifp->if_snd, m);
205 }
206 if (tx)
207 PDQ_DO_TYPE2_PRODUCER(sc->sc_pdq);
208 sc->sc_flags &= ~PDQIF_DOWNCALL;
209 }
210
211 static void
pdq_ifstart(struct ifnet * ifp)212 pdq_ifstart(struct ifnet *ifp)
213 {
214 pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
215
216 PDQ_LOCK(sc);
217 pdq_ifstart_locked(ifp);
218 PDQ_UNLOCK(sc);
219 }
220
221 void
pdq_os_receive_pdu(pdq_t * pdq,struct mbuf * m,size_t pktlen,int drop)222 pdq_os_receive_pdu(
223 pdq_t *pdq,
224 struct mbuf *m,
225 size_t pktlen,
226 int drop)
227 {
228 pdq_softc_t *sc = pdq->pdq_os_ctx;
229 struct ifnet *ifp = PDQ_IFNET(sc);
230 struct fddi_header *fh;
231
232 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
233 #if defined(PDQ_BUS_DMA)
234 {
235 /*
236 * Even though the first mbuf start at the first fddi header octet,
237 * the dmamap starts PDQ_OS_HDR_OFFSET octets earlier. Any additional
238 * mbufs will start normally.
239 */
240 int offset = PDQ_OS_HDR_OFFSET;
241 struct mbuf *m0;
242 for (m0 = m; m0 != NULL; m0 = m0->m_next, offset = 0) {
243 pdq_os_databuf_sync(sc, m0, offset, m0->m_len, BUS_DMASYNC_POSTREAD);
244 bus_dmamap_unload(sc->sc_dmatag, M_GETCTX(m0, bus_dmamap_t));
245 bus_dmamap_destroy(sc->sc_dmatag, M_GETCTX(m0, bus_dmamap_t));
246 m0->m_flags &= ~M_HASRXDMAMAP;
247 M_SETCTX(m0, NULL);
248 }
249 }
250 #endif
251 m->m_pkthdr.len = pktlen;
252 fh = mtod(m, struct fddi_header *);
253 if (drop || (fh->fddi_fc & (FDDIFC_L|FDDIFC_F)) != FDDIFC_LLC_ASYNC) {
254 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
255 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
256 PDQ_OS_DATABUF_FREE(pdq, m);
257 return;
258 }
259
260 m->m_pkthdr.rcvif = ifp;
261 PDQ_UNLOCK(sc);
262 (*ifp->if_input)(ifp, m);
263 PDQ_LOCK(sc);
264 }
265
266 void
pdq_os_restart_transmitter(pdq_t * pdq)267 pdq_os_restart_transmitter(
268 pdq_t *pdq)
269 {
270 pdq_softc_t *sc = pdq->pdq_os_ctx;
271 PDQ_IFNET(sc)->if_drv_flags &= ~IFF_DRV_OACTIVE;
272 if (IFQ_IS_EMPTY(&PDQ_IFNET(sc)->if_snd) == 0) {
273 sc->timer = PDQ_OS_TX_TIMEOUT;
274 if ((sc->sc_flags & PDQIF_DOWNCALL) == 0)
275 pdq_ifstart_locked(PDQ_IFNET(sc));
276 } else {
277 sc->timer = 0;
278 }
279 }
280
281 void
pdq_os_transmit_done(pdq_t * pdq,struct mbuf * m)282 pdq_os_transmit_done(
283 pdq_t *pdq,
284 struct mbuf *m)
285 {
286 pdq_softc_t *sc = pdq->pdq_os_ctx;
287 #if defined(NBPFILTER) && NBPFILTER > 0
288 if (PQD_IFNET(sc)->if_bpf != NULL)
289 PDQ_BPF_MTAP(sc, m);
290 #endif
291 PDQ_OS_DATABUF_FREE(pdq, m);
292 if_inc_counter(PDQ_IFNET(sc), IFCOUNTER_OPACKETS, 1);
293 }
294
295 void
pdq_os_addr_fill(pdq_t * pdq,pdq_lanaddr_t * addr,size_t num_addrs)296 pdq_os_addr_fill(
297 pdq_t *pdq,
298 pdq_lanaddr_t *addr,
299 size_t num_addrs)
300 {
301 pdq_softc_t *sc = pdq->pdq_os_ctx;
302 struct ifnet *ifp;
303 struct ifmultiaddr *ifma;
304
305 ifp = sc->ifp;
306
307 /*
308 * ADDR_FILTER_SET is always issued before FILTER_SET so
309 * we can play with PDQ_ALLMULTI and not worry about
310 * queueing a FILTER_SET ourselves.
311 */
312
313 pdq->pdq_flags &= ~PDQ_ALLMULTI;
314 #if defined(IFF_ALLMULTI)
315 PDQ_IFNET(sc)->if_flags &= ~IFF_ALLMULTI;
316 #endif
317
318 if_maddr_rlock(PDQ_IFNET(sc));
319 for (ifma = TAILQ_FIRST(&PDQ_IFNET(sc)->if_multiaddrs); ifma && num_addrs > 0;
320 ifma = TAILQ_NEXT(ifma, ifma_link)) {
321 char *mcaddr;
322 if (ifma->ifma_addr->sa_family != AF_LINK)
323 continue;
324 mcaddr = LLADDR((struct sockaddr_dl *)ifma->ifma_addr);
325 ((u_short *) addr->lanaddr_bytes)[0] = ((u_short *) mcaddr)[0];
326 ((u_short *) addr->lanaddr_bytes)[1] = ((u_short *) mcaddr)[1];
327 ((u_short *) addr->lanaddr_bytes)[2] = ((u_short *) mcaddr)[2];
328 addr++;
329 num_addrs--;
330 }
331 if_maddr_runlock(PDQ_IFNET(sc));
332 /*
333 * If not all the address fit into the CAM, turn on all-multicast mode.
334 */
335 if (ifma != NULL) {
336 pdq->pdq_flags |= PDQ_ALLMULTI;
337 #if defined(IFF_ALLMULTI)
338 PDQ_IFNET(sc)->if_flags |= IFF_ALLMULTI;
339 #endif
340 }
341 }
342
343 #if defined(IFM_FDDI)
344 static int
pdq_ifmedia_change(struct ifnet * ifp)345 pdq_ifmedia_change(
346 struct ifnet *ifp)
347 {
348 pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
349
350 PDQ_LOCK(sc);
351 if (sc->sc_ifmedia.ifm_media & IFM_FDX) {
352 if ((sc->sc_pdq->pdq_flags & PDQ_WANT_FDX) == 0) {
353 sc->sc_pdq->pdq_flags |= PDQ_WANT_FDX;
354 if (sc->sc_pdq->pdq_flags & PDQ_RUNNING)
355 pdq_run(sc->sc_pdq);
356 }
357 } else if (sc->sc_pdq->pdq_flags & PDQ_WANT_FDX) {
358 sc->sc_pdq->pdq_flags &= ~PDQ_WANT_FDX;
359 if (sc->sc_pdq->pdq_flags & PDQ_RUNNING)
360 pdq_run(sc->sc_pdq);
361 }
362 PDQ_UNLOCK(sc);
363
364 return 0;
365 }
366
367 static void
pdq_ifmedia_status(struct ifnet * ifp,struct ifmediareq * ifmr)368 pdq_ifmedia_status(
369 struct ifnet *ifp,
370 struct ifmediareq *ifmr)
371 {
372 pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
373
374 PDQ_LOCK(sc);
375 ifmr->ifm_status = IFM_AVALID;
376 if (sc->sc_pdq->pdq_flags & PDQ_IS_ONRING)
377 ifmr->ifm_status |= IFM_ACTIVE;
378
379 ifmr->ifm_active = (ifmr->ifm_current & ~IFM_FDX);
380 if (sc->sc_pdq->pdq_flags & PDQ_IS_FDX)
381 ifmr->ifm_active |= IFM_FDX;
382 PDQ_UNLOCK(sc);
383 }
384
385 void
pdq_os_update_status(pdq_t * pdq,const void * arg)386 pdq_os_update_status(
387 pdq_t *pdq,
388 const void *arg)
389 {
390 pdq_softc_t * const sc = pdq->pdq_os_ctx;
391 const pdq_response_status_chars_get_t *rsp = arg;
392 int media = 0;
393
394 switch (rsp->status_chars_get.pmd_type[0]) {
395 case PDQ_PMD_TYPE_ANSI_MUTLI_MODE: media = IFM_FDDI_MMF; break;
396 case PDQ_PMD_TYPE_ANSI_SINGLE_MODE_TYPE_1: media = IFM_FDDI_SMF; break;
397 case PDQ_PMD_TYPE_ANSI_SIGNLE_MODE_TYPE_2: media = IFM_FDDI_SMF; break;
398 case PDQ_PMD_TYPE_UNSHIELDED_TWISTED_PAIR: media = IFM_FDDI_UTP; break;
399 default: media |= IFM_MANUAL;
400 }
401
402 if (rsp->status_chars_get.station_type == PDQ_STATION_TYPE_DAS)
403 media |= IFM_FDDI_DA;
404
405 sc->sc_ifmedia.ifm_media = media | IFM_FDDI;
406 }
407 #endif /* defined(IFM_FDDI) */
408
409 static int
pdq_ifioctl(struct ifnet * ifp,u_long cmd,caddr_t data)410 pdq_ifioctl(
411 struct ifnet *ifp,
412 u_long cmd,
413 caddr_t data)
414 {
415 pdq_softc_t *sc = PDQ_OS_IFP_TO_SOFTC(ifp);
416 int error = 0;
417
418 switch (cmd) {
419 case SIOCSIFFLAGS: {
420 pdq_ifinit(sc);
421 break;
422 }
423
424 case SIOCADDMULTI:
425 case SIOCDELMULTI: {
426 PDQ_LOCK(sc);
427 if (PDQ_IFNET(sc)->if_drv_flags & IFF_DRV_RUNNING) {
428 pdq_run(sc->sc_pdq);
429 error = 0;
430 }
431 PDQ_UNLOCK(sc);
432 break;
433 }
434
435 #if defined(IFM_FDDI) && defined(SIOCSIFMEDIA)
436 case SIOCSIFMEDIA:
437 case SIOCGIFMEDIA: {
438 struct ifreq *ifr = (struct ifreq *)data;
439 error = ifmedia_ioctl(ifp, ifr, &sc->sc_ifmedia, cmd);
440 break;
441 }
442 #endif
443
444 default: {
445 error = fddi_ioctl(ifp, cmd, data);
446 break;
447 }
448 }
449
450 return error;
451 }
452
453 #ifndef IFF_NOTRAILERS
454 #define IFF_NOTRAILERS 0
455 #endif
456
457 int
pdq_ifattach(pdq_softc_t * sc,const pdq_uint8_t * llc,pdq_type_t type)458 pdq_ifattach(pdq_softc_t *sc, const pdq_uint8_t *llc, pdq_type_t type)
459 {
460 struct ifnet *ifp;
461
462 ifp = PDQ_IFNET(sc) = if_alloc(IFT_FDDI);
463 if (ifp == NULL) {
464 device_printf(sc->dev, "can not if_alloc()\n");
465 return (ENOSPC);
466 }
467
468 mtx_init(&sc->mtx, device_get_nameunit(sc->dev), MTX_NETWORK_LOCK,
469 MTX_DEF);
470 callout_init_mtx(&sc->watchdog, &sc->mtx, 0);
471
472 if_initname(ifp, device_get_name(sc->dev), device_get_unit(sc->dev));
473 ifp->if_softc = sc;
474 ifp->if_init = pdq_ifinit;
475 ifp->if_snd.ifq_maxlen = ifqmaxlen;
476 ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_NOTRAILERS|IFF_MULTICAST;
477
478 ifp->if_ioctl = pdq_ifioctl;
479 ifp->if_start = pdq_ifstart;
480
481 #if defined(IFM_FDDI)
482 {
483 const int media = sc->sc_ifmedia.ifm_media;
484 ifmedia_init(&sc->sc_ifmedia, IFM_FDX,
485 pdq_ifmedia_change, pdq_ifmedia_status);
486 ifmedia_add(&sc->sc_ifmedia, media, 0, 0);
487 ifmedia_set(&sc->sc_ifmedia, media);
488 }
489 #endif
490
491 sc->sc_pdq = pdq_initialize(sc->mem_bst, sc->mem_bsh, ifp->if_xname, -1,
492 sc, type);
493 if (sc->sc_pdq == NULL) {
494 device_printf(sc->dev, "Initialization failed.\n");
495 return (ENXIO);
496 }
497
498 fddi_ifattach(ifp, llc, FDDI_BPF_SUPPORTED);
499 return (0);
500 }
501
502 void
pdq_ifdetach(pdq_softc_t * sc)503 pdq_ifdetach (pdq_softc_t *sc)
504 {
505 struct ifnet *ifp;
506
507 ifp = sc->ifp;
508
509 fddi_ifdetach(ifp, FDDI_BPF_SUPPORTED);
510 PDQ_LOCK(sc);
511 pdq_ifstop(sc);
512 PDQ_UNLOCK(sc);
513 callout_drain(&sc->watchdog);
514 pdq_free(sc->dev);
515
516 return;
517 }
518
519 void
pdq_free(device_t dev)520 pdq_free (device_t dev)
521 {
522 pdq_softc_t *sc;
523
524 sc = device_get_softc(dev);
525
526 if (sc->io)
527 bus_release_resource(dev, sc->io_type, sc->io_rid, sc->io);
528 if (sc->mem)
529 bus_release_resource(dev, sc->mem_type, sc->mem_rid, sc->mem);
530 if (sc->irq_ih)
531 bus_teardown_intr(dev, sc->irq, sc->irq_ih);
532 if (sc->irq)
533 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq);
534 if (sc->ifp)
535 if_free(sc->ifp);
536
537 /*
538 * Destroy the mutex.
539 */
540 if (mtx_initialized(&sc->mtx) != 0) {
541 mtx_destroy(&sc->mtx);
542 }
543
544 return;
545 }
546
547 #if defined(PDQ_BUS_DMA)
548 int
pdq_os_memalloc_contig(pdq_t * pdq)549 pdq_os_memalloc_contig(
550 pdq_t *pdq)
551 {
552 pdq_softc_t * const sc = pdq->pdq_os_ctx;
553 bus_dma_segment_t db_segs[1], ui_segs[1], cb_segs[1];
554 int db_nsegs = 0, ui_nsegs = 0;
555 int steps = 0;
556 int not_ok;
557
558 not_ok = bus_dmamem_alloc(sc->sc_dmatag,
559 sizeof(*pdq->pdq_dbp), sizeof(*pdq->pdq_dbp),
560 sizeof(*pdq->pdq_dbp), db_segs, 1, &db_nsegs,
561 BUS_DMA_NOWAIT);
562 if (!not_ok) {
563 steps = 1;
564 not_ok = bus_dmamem_map(sc->sc_dmatag, db_segs, db_nsegs,
565 sizeof(*pdq->pdq_dbp), (caddr_t *) &pdq->pdq_dbp,
566 BUS_DMA_NOWAIT);
567 }
568 if (!not_ok) {
569 steps = 2;
570 not_ok = bus_dmamap_create(sc->sc_dmatag, db_segs[0].ds_len, 1,
571 0x2000, 0, BUS_DMA_NOWAIT, &sc->sc_dbmap);
572 }
573 if (!not_ok) {
574 steps = 3;
575 not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_dbmap,
576 pdq->pdq_dbp, sizeof(*pdq->pdq_dbp),
577 NULL, BUS_DMA_NOWAIT);
578 }
579 if (!not_ok) {
580 steps = 4;
581 pdq->pdq_pa_descriptor_block = sc->sc_dbmap->dm_segs[0].ds_addr;
582 not_ok = bus_dmamem_alloc(sc->sc_dmatag,
583 PDQ_OS_PAGESIZE, PDQ_OS_PAGESIZE, PDQ_OS_PAGESIZE,
584 ui_segs, 1, &ui_nsegs, BUS_DMA_NOWAIT);
585 }
586 if (!not_ok) {
587 steps = 5;
588 not_ok = bus_dmamem_map(sc->sc_dmatag, ui_segs, ui_nsegs,
589 PDQ_OS_PAGESIZE,
590 (caddr_t *) &pdq->pdq_unsolicited_info.ui_events,
591 BUS_DMA_NOWAIT);
592 }
593 if (!not_ok) {
594 steps = 6;
595 not_ok = bus_dmamap_create(sc->sc_dmatag, ui_segs[0].ds_len, 1,
596 PDQ_OS_PAGESIZE, 0, BUS_DMA_NOWAIT,
597 &sc->sc_uimap);
598 }
599 if (!not_ok) {
600 steps = 7;
601 not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_uimap,
602 pdq->pdq_unsolicited_info.ui_events,
603 PDQ_OS_PAGESIZE, NULL, BUS_DMA_NOWAIT);
604 }
605 if (!not_ok) {
606 steps = 8;
607 pdq->pdq_unsolicited_info.ui_pa_bufstart = sc->sc_uimap->dm_segs[0].ds_addr;
608 cb_segs[0] = db_segs[0];
609 cb_segs[0].ds_addr += offsetof(pdq_descriptor_block_t, pdqdb_consumer);
610 cb_segs[0].ds_len = sizeof(pdq_consumer_block_t);
611 not_ok = bus_dmamem_map(sc->sc_dmatag, cb_segs, 1,
612 sizeof(*pdq->pdq_cbp), (caddr_t *) &pdq->pdq_cbp,
613 BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
614 }
615 if (!not_ok) {
616 steps = 9;
617 not_ok = bus_dmamap_create(sc->sc_dmatag, cb_segs[0].ds_len, 1,
618 0x2000, 0, BUS_DMA_NOWAIT, &sc->sc_cbmap);
619 }
620 if (!not_ok) {
621 steps = 10;
622 not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_cbmap,
623 (caddr_t) pdq->pdq_cbp, sizeof(*pdq->pdq_cbp),
624 NULL, BUS_DMA_NOWAIT);
625 }
626 if (!not_ok) {
627 pdq->pdq_pa_consumer_block = sc->sc_cbmap->dm_segs[0].ds_addr;
628 return not_ok;
629 }
630
631 switch (steps) {
632 case 11: {
633 bus_dmamap_unload(sc->sc_dmatag, sc->sc_cbmap);
634 /* FALL THROUGH */
635 }
636 case 10: {
637 bus_dmamap_destroy(sc->sc_dmatag, sc->sc_cbmap);
638 /* FALL THROUGH */
639 }
640 case 9: {
641 bus_dmamem_unmap(sc->sc_dmatag,
642 (caddr_t) pdq->pdq_cbp, sizeof(*pdq->pdq_cbp));
643 /* FALL THROUGH */
644 }
645 case 8: {
646 bus_dmamap_unload(sc->sc_dmatag, sc->sc_uimap);
647 /* FALL THROUGH */
648 }
649 case 7: {
650 bus_dmamap_destroy(sc->sc_dmatag, sc->sc_uimap);
651 /* FALL THROUGH */
652 }
653 case 6: {
654 bus_dmamem_unmap(sc->sc_dmatag,
655 (caddr_t) pdq->pdq_unsolicited_info.ui_events,
656 PDQ_OS_PAGESIZE);
657 /* FALL THROUGH */
658 }
659 case 5: {
660 bus_dmamem_free(sc->sc_dmatag, ui_segs, ui_nsegs);
661 /* FALL THROUGH */
662 }
663 case 4: {
664 bus_dmamap_unload(sc->sc_dmatag, sc->sc_dbmap);
665 /* FALL THROUGH */
666 }
667 case 3: {
668 bus_dmamap_destroy(sc->sc_dmatag, sc->sc_dbmap);
669 /* FALL THROUGH */
670 }
671 case 2: {
672 bus_dmamem_unmap(sc->sc_dmatag,
673 (caddr_t) pdq->pdq_dbp,
674 sizeof(*pdq->pdq_dbp));
675 /* FALL THROUGH */
676 }
677 case 1: {
678 bus_dmamem_free(sc->sc_dmatag, db_segs, db_nsegs);
679 /* FALL THROUGH */
680 }
681 }
682
683 return not_ok;
684 }
685
686 extern void
pdq_os_descriptor_block_sync(pdq_os_ctx_t * sc,size_t offset,size_t length,int ops)687 pdq_os_descriptor_block_sync(
688 pdq_os_ctx_t *sc,
689 size_t offset,
690 size_t length,
691 int ops)
692 {
693 bus_dmamap_sync(sc->sc_dmatag, sc->sc_dbmap, offset, length, ops);
694 }
695
696 extern void
pdq_os_consumer_block_sync(pdq_os_ctx_t * sc,int ops)697 pdq_os_consumer_block_sync(
698 pdq_os_ctx_t *sc,
699 int ops)
700 {
701 bus_dmamap_sync(sc->sc_dmatag, sc->sc_cbmap, 0, sizeof(pdq_consumer_block_t), ops);
702 }
703
704 extern void
pdq_os_unsolicited_event_sync(pdq_os_ctx_t * sc,size_t offset,size_t length,int ops)705 pdq_os_unsolicited_event_sync(
706 pdq_os_ctx_t *sc,
707 size_t offset,
708 size_t length,
709 int ops)
710 {
711 bus_dmamap_sync(sc->sc_dmatag, sc->sc_uimap, offset, length, ops);
712 }
713
714 extern void
pdq_os_databuf_sync(pdq_os_ctx_t * sc,struct mbuf * m,size_t offset,size_t length,int ops)715 pdq_os_databuf_sync(
716 pdq_os_ctx_t *sc,
717 struct mbuf *m,
718 size_t offset,
719 size_t length,
720 int ops)
721 {
722 bus_dmamap_sync(sc->sc_dmatag, M_GETCTX(m, bus_dmamap_t), offset, length, ops);
723 }
724
725 extern void
pdq_os_databuf_free(pdq_os_ctx_t * sc,struct mbuf * m)726 pdq_os_databuf_free(
727 pdq_os_ctx_t *sc,
728 struct mbuf *m)
729 {
730 if (m->m_flags & (M_HASRXDMAMAP|M_HASTXDMAMAP)) {
731 bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t);
732 bus_dmamap_unload(sc->sc_dmatag, map);
733 bus_dmamap_destroy(sc->sc_dmatag, map);
734 m->m_flags &= ~(M_HASRXDMAMAP|M_HASTXDMAMAP);
735 }
736 m_freem(m);
737 }
738
739 extern struct mbuf *
pdq_os_databuf_alloc(pdq_os_ctx_t * sc)740 pdq_os_databuf_alloc(
741 pdq_os_ctx_t *sc)
742 {
743 struct mbuf *m;
744 bus_dmamap_t map;
745
746 MGETHDR(m, M_NOWAIT, MT_DATA);
747 if (m == NULL) {
748 printf("%s: can't alloc small buf\n", sc->sc_dev.dv_xname);
749 return NULL;
750 }
751 if (!(MCLGET(m, M_NOWAIT))) {
752 printf("%s: can't alloc cluster\n", sc->sc_dev.dv_xname);
753 m_free(m);
754 return NULL;
755 }
756 m->m_pkthdr.len = m->m_len = PDQ_OS_DATABUF_SIZE;
757
758 if (bus_dmamap_create(sc->sc_dmatag, PDQ_OS_DATABUF_SIZE,
759 1, PDQ_OS_DATABUF_SIZE, 0, BUS_DMA_NOWAIT, &map)) {
760 printf("%s: can't create dmamap\n", sc->sc_dev.dv_xname);
761 m_free(m);
762 return NULL;
763 }
764 if (bus_dmamap_load_mbuf(sc->sc_dmatag, map, m,
765 BUS_DMA_READ|BUS_DMA_NOWAIT)) {
766 printf("%s: can't load dmamap\n", sc->sc_dev.dv_xname);
767 bus_dmamap_destroy(sc->sc_dmatag, map);
768 m_free(m);
769 return NULL;
770 }
771 m->m_flags |= M_HASRXDMAMAP;
772 M_SETCTX(m, map);
773 return m;
774 }
775 #endif
776