if_ec.c revision 1.20
1 /* $NetBSD: if_ec.c,v 1.20 2012/02/02 19:43:00 tls Exp $ */ 2 3 /* 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matthew Fredette. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * 3Com 3C400 device driver 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: if_ec.c,v 1.20 2012/02/02 19:43:00 tls Exp $"); 38 39 #include "opt_inet.h" 40 #include "opt_ns.h" 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/errno.h> 45 #include <sys/ioctl.h> 46 #include <sys/mbuf.h> 47 #include <sys/socket.h> 48 #include <sys/syslog.h> 49 #include <sys/device.h> 50 #include <sys/endian.h> 51 #include <sys/rnd.h> 52 53 #include <net/if.h> 54 #include <net/if_dl.h> 55 #include <net/if_types.h> 56 57 #include <net/if_ether.h> 58 #include <net/if_media.h> 59 60 #ifdef INET 61 #include <netinet/in.h> 62 #include <netinet/in_systm.h> 63 #include <netinet/in_var.h> 64 #include <netinet/ip.h> 65 #include <netinet/if_inarp.h> 66 #endif 67 68 #ifdef NS 69 #include <netns/ns.h> 70 #include <netns/ns_if.h> 71 #endif 72 73 #include <net/bpf.h> 74 #include <net/bpfdesc.h> 75 76 #include <machine/cpu.h> 77 #include <machine/autoconf.h> 78 #include <machine/idprom.h> 79 #include <machine/bus.h> 80 #include <machine/intr.h> 81 82 #include <sun2/dev/if_ecreg.h> 83 84 /* 85 * Interface softc. 86 */ 87 struct ec_softc { 88 device_t sc_dev; 89 void *sc_ih; 90 91 struct ethercom sc_ethercom; /* ethernet common */ 92 struct ifmedia sc_media; /* our supported media */ 93 94 bus_space_tag_t sc_iot; /* bus space tag */ 95 bus_space_handle_t sc_ioh; /* bus space handle */ 96 97 u_char sc_jammed; /* nonzero if the net is jammed */ 98 u_char sc_colliding; /* nonzero if the net is colliding */ 99 uint32_t sc_backoff_seed; /* seed for the backoff PRNG */ 100 101 krndsource_t rnd_source; 102 }; 103 104 /* Macros to read and write the CSR. */ 105 #define ECREG_CSR_RD bus_space_read_2(sc->sc_iot, sc->sc_ioh, ECREG_CSR) 106 #define ECREG_CSR_WR(val) bus_space_write_2(sc->sc_iot, sc->sc_ioh, ECREG_CSR, val) 107 108 /* After this many collisions, the packet is dropped. */ 109 #define EC_COLLISIONS_JAMMED 16 110 111 /* 112 * Various constants used in the backoff pseudorandom 113 * number generator. 114 */ 115 #define EC_BACKOFF_PRNG_COLL_MAX 10 116 #define EC_BACKOFF_PRNG_MUL 1103515245 117 #define EC_BACKOFF_PRNG_ADD 12345 118 #define EC_BACKOFF_PRNG_MASK 0x7fffffff 119 120 /* 121 * Prototypes 122 */ 123 int ec_intr(void *); 124 void ec_reset(struct ifnet *); 125 int ec_init(struct ifnet *); 126 int ec_ioctl(struct ifnet *, u_long, void *); 127 void ec_watchdog(struct ifnet *); 128 void ec_start(struct ifnet *); 129 130 void ec_recv(struct ec_softc *, int); 131 void ec_coll(struct ec_softc *); 132 void ec_copyin(struct ec_softc *, void *, int, size_t); 133 void ec_copyout(struct ec_softc *, const void *, int, size_t); 134 135 int ec_mediachange(struct ifnet *); 136 void ec_mediastatus(struct ifnet *, struct ifmediareq *); 137 138 int ec_match(device_t, cfdata_t, void *); 139 void ec_attach(device_t, device_t, void *); 140 141 CFATTACH_DECL_NEW(ec, sizeof(struct ec_softc), 142 ec_match, ec_attach, NULL, NULL); 143 144 /* 145 * Copy board memory to kernel. 146 */ 147 void 148 ec_copyin(struct ec_softc *sc, void *p, int offset, size_t size) 149 { 150 151 bus_space_copyin(sc->sc_iot, sc->sc_ioh, offset, p, size); 152 } 153 154 /* 155 * Copy from kernel space to board memory. 156 */ 157 void 158 ec_copyout(struct ec_softc *sc, const void *p, int offset, size_t size) 159 { 160 161 bus_space_copyout(sc->sc_iot, sc->sc_ioh, offset, p, size); 162 } 163 164 int 165 ec_match(device_t parent, cfdata_t cf, void *aux) 166 { 167 struct mbmem_attach_args *mbma = aux; 168 bus_space_handle_t bh; 169 bool matched; 170 171 /* No default Multibus address. */ 172 if (mbma->mbma_paddr == -1) 173 return 0; 174 175 /* Make sure there is something there... */ 176 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, ECREG_BANK_SZ, 177 0, &bh)) 178 return 0; 179 matched = (bus_space_peek_2(mbma->mbma_bustag, bh, 0, NULL) == 0); 180 bus_space_unmap(mbma->mbma_bustag, bh, ECREG_BANK_SZ); 181 if (!matched) 182 return 0; 183 184 /* Default interrupt priority. */ 185 if (mbma->mbma_pri == -1) 186 mbma->mbma_pri = 3; 187 188 return 1; 189 } 190 191 void 192 ec_attach(device_t parent, device_t self, void *aux) 193 { 194 struct ec_softc *sc = device_private(self); 195 struct mbmem_attach_args *mbma = aux; 196 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 197 uint8_t myaddr[ETHER_ADDR_LEN]; 198 199 sc->sc_dev = self; 200 201 aprint_normal("\n"); 202 203 /* Map in the board control regs. */ 204 sc->sc_iot = mbma->mbma_bustag; 205 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, ECREG_BANK_SZ, 206 0, &sc->sc_ioh)) 207 panic("%s: can't map regs", __func__); 208 209 /* Reset the board. */ 210 ECREG_CSR_WR(EC_CSR_RESET); 211 delay(160); 212 213 /* 214 * Copy out the board ROM Ethernet address, 215 * and use the non-vendor-ID part to seed 216 * our backoff pseudorandom number generator. 217 */ 218 bus_space_read_region_1(sc->sc_iot, sc->sc_ioh, 219 ECREG_AROM, myaddr, ETHER_ADDR_LEN); 220 sc->sc_backoff_seed = 221 (myaddr[3] << 16) | (myaddr[4] << 8) | (myaddr[5]) | 1; 222 223 /* Initialize ifnet structure. */ 224 strcpy(ifp->if_xname, device_xname(self)); 225 ifp->if_softc = sc; 226 ifp->if_start = ec_start; 227 ifp->if_ioctl = ec_ioctl; 228 ifp->if_init = ec_init; 229 ifp->if_watchdog = ec_watchdog; 230 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS; 231 IFQ_SET_READY(&ifp->if_snd); 232 233 /* Initialize ifmedia structures. */ 234 ifmedia_init(&sc->sc_media, 0, ec_mediachange, ec_mediastatus); 235 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 236 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 237 238 /* Now we can attach the interface. */ 239 if_attach(ifp); 240 idprom_etheraddr(myaddr); 241 ether_ifattach(ifp, myaddr); 242 aprint_normal_dev(self, "address %s\n", ether_sprintf(myaddr)); 243 244 bus_intr_establish(mbma->mbma_bustag, mbma->mbma_pri, IPL_NET, 0, 245 ec_intr, sc); 246 247 rnd_attach_source(&sc->rnd_source, device_xname(self), 248 RND_TYPE_NET, 0); 249 } 250 251 /* 252 * Reset interface. 253 */ 254 void 255 ec_reset(struct ifnet *ifp) 256 { 257 int s; 258 259 s = splnet(); 260 ec_init(ifp); 261 splx(s); 262 } 263 264 265 /* 266 * Initialize interface. 267 */ 268 int 269 ec_init(struct ifnet *ifp) 270 { 271 struct ec_softc *sc = ifp->if_softc; 272 273 /* Reset the board. */ 274 ECREG_CSR_WR(EC_CSR_RESET); 275 delay(160); 276 277 /* Set the Ethernet address. */ 278 bus_space_write_region_1(sc->sc_iot, sc->sc_ioh, 279 ECREG_ARAM, CLLADDR(sc->sc_ethercom.ec_if.if_sadl), ETHER_ADDR_LEN); 280 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_INTPA) | EC_CSR_AMSW); 281 ECREG_CSR_WR(ECREG_CSR_RD & 0); 282 283 /* Enable interrupts. */ 284 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_INTPA) | 285 EC_CSR_BBSW | EC_CSR_ABSW | EC_CSR_BINT | EC_CSR_AINT | 286 (ifp->if_flags & IFF_PROMISC ? EC_CSR_PROMISC : EC_CSR_PA)); 287 288 /* Set flags appropriately. */ 289 ifp->if_flags |= IFF_RUNNING; 290 ifp->if_flags &= ~IFF_OACTIVE; 291 292 /* Start output. */ 293 ec_start(ifp); 294 295 return 0; 296 } 297 298 /* 299 * Start output on interface. 300 */ 301 void 302 ec_start(struct ifnet *ifp) 303 { 304 struct ec_softc *sc = ifp->if_softc; 305 struct mbuf *m, *m0; 306 int s; 307 u_int count, realcount; 308 bus_size_t off; 309 static uint8_t padding[ETHER_MIN_LEN - ETHER_CRC_LEN] = {0}; 310 311 s = splnet(); 312 313 /* Don't do anything if output is active. */ 314 if ((ifp->if_flags & IFF_OACTIVE) != 0) { 315 splx(s); 316 return; 317 } 318 /* Don't do anything if the output queue is empty. */ 319 IFQ_DEQUEUE(&ifp->if_snd, m0); 320 if (m0 == NULL) { 321 splx(s); 322 return; 323 } 324 325 /* The BPF tap. */ 326 bpf_mtap(ifp, m0); 327 328 /* Size the packet. */ 329 count = EC_BUF_SZ - m0->m_pkthdr.len; 330 331 /* Copy the packet into the xmit buffer. */ 332 realcount = MIN(count, EC_PKT_MAXTDOFF); 333 bus_space_write_2(sc->sc_iot, sc->sc_ioh, ECREG_TBUF, realcount); 334 for (off = realcount, m = m0; m != 0; off += m->m_len, m = m->m_next) 335 ec_copyout(sc, mtod(m, uint8_t *), ECREG_TBUF + off, m->m_len); 336 m_freem(m0); 337 if (count - realcount) 338 ec_copyout(sc, padding, ECREG_TBUF + off, count - realcount); 339 340 /* Enable the transmitter. */ 341 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_PA) | 342 EC_CSR_TBSW | EC_CSR_TINT | EC_CSR_JINT); 343 ifp->if_flags |= IFF_OACTIVE; 344 345 /* Done. */ 346 splx(s); 347 } 348 349 /* 350 * Controller interrupt. 351 */ 352 int 353 ec_intr(void *arg) 354 { 355 struct ec_softc *sc = arg; 356 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 357 int recv_first; 358 int recv_second; 359 int retval; 360 struct mbuf *m0; 361 362 retval = 0; 363 364 /* Check for received packet(s). */ 365 recv_first = recv_second = 0; 366 switch (ECREG_CSR_RD & (EC_CSR_BBSW | EC_CSR_ABSW | EC_CSR_RBBA)) { 367 368 case (EC_CSR_BBSW | EC_CSR_ABSW): 369 case (EC_CSR_BBSW | EC_CSR_ABSW | EC_CSR_RBBA): 370 /* Neither buffer is full. Is this a transmit interrupt? 371 * Acknowledge the interrupt ourselves. */ 372 ECREG_CSR_WR(ECREG_CSR_RD & 373 (EC_CSR_TINT | EC_CSR_JINT | EC_CSR_PAMASK)); 374 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_INTPA) | 375 EC_CSR_BINT | EC_CSR_AINT); 376 break; 377 378 case EC_CSR_BBSW: 379 case (EC_CSR_BBSW | EC_CSR_RBBA): 380 /* Only the A buffer is full. */ 381 recv_first = EC_CSR_AINT; 382 break; 383 384 case EC_CSR_ABSW: 385 case (EC_CSR_ABSW | EC_CSR_RBBA): 386 /* Only the B buffer is full. */ 387 recv_first = EC_CSR_BINT; 388 break; 389 390 case 0: 391 /* Both the A buffer and the B buffer are full, and the A 392 * buffer is older than the B buffer. */ 393 recv_first = EC_CSR_AINT; 394 recv_second = EC_CSR_BINT; 395 break; 396 397 case EC_CSR_RBBA: 398 /* Both the A buffer and the B buffer are full, and the B 399 * buffer is older than the A buffer. */ 400 recv_first = EC_CSR_BINT; 401 recv_second = EC_CSR_AINT; 402 break; 403 } 404 405 /* Receive packets. */ 406 if (recv_first) { 407 408 /* Acknowledge the interrupt. */ 409 ECREG_CSR_WR(ECREG_CSR_RD & 410 ((EC_CSR_BINT | EC_CSR_AINT | EC_CSR_TINT | EC_CSR_JINT | 411 EC_CSR_PAMASK) ^ (recv_first | recv_second))); 412 413 /* Receive a packet. */ 414 ec_recv(sc, recv_first); 415 416 /* Receive a packet. */ 417 if (recv_second) 418 ec_recv(sc, recv_second); 419 420 retval++; 421 } 422 /* Check for a transmitted packet. */ 423 if (ifp->if_flags & IFF_OACTIVE) { 424 425 /* If we got a collision. */ 426 if (ECREG_CSR_RD & EC_CSR_JAM) { 427 ECREG_CSR_WR(ECREG_CSR_RD & 428 (EC_CSR_BINT | EC_CSR_AINT | EC_CSR_PAMASK)); 429 sc->sc_ethercom.ec_if.if_collisions++; 430 retval++; 431 ec_coll(sc); 432 433 } 434 /* If we transmitted a packet. */ 435 else if ((ECREG_CSR_RD & EC_CSR_TBSW) == 0) { 436 ECREG_CSR_WR(ECREG_CSR_RD & 437 (EC_CSR_BINT | EC_CSR_AINT | EC_CSR_PAMASK)); 438 retval++; 439 sc->sc_ethercom.ec_if.if_opackets++; 440 sc->sc_jammed = 0; 441 ifp->if_flags &= ~IFF_OACTIVE; 442 IFQ_POLL(&ifp->if_snd, m0); 443 if (m0 != NULL) 444 ec_start(ifp); 445 } 446 } else { 447 448 /* Make sure we disable transmitter interrupts. */ 449 ECREG_CSR_WR(ECREG_CSR_RD & 450 (EC_CSR_BINT | EC_CSR_AINT | EC_CSR_PAMASK)); 451 } 452 453 return retval; 454 } 455 456 /* 457 * Read in a packet from the board. 458 */ 459 void 460 ec_recv(struct ec_softc *sc, int intbit) 461 { 462 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 463 struct mbuf *m0, *m, *newm; 464 bus_size_t buf; 465 uint16_t status; 466 uint16_t doff; 467 int length, total_length; 468 469 buf = EC_CSR_INT_BUF(intbit); 470 471 /* Read in the packet status. */ 472 status = bus_space_read_2(sc->sc_iot, sc->sc_ioh, buf); 473 doff = status & EC_PKT_DOFF; 474 475 for (total_length = -1, m0 = NULL;;) { 476 477 /* Check for an error. */ 478 if (status & (EC_PKT_FCSERR | EC_PKT_RGERR | EC_PKT_FRERR) || 479 doff < EC_PKT_MINRDOFF || 480 doff > EC_PKT_MAXRDOFF) { 481 printf("%s: garbled packet, status 0x%04x; dropping\n", 482 device_xname(sc->sc_dev), (unsigned int)status); 483 break; 484 } 485 486 /* Adjust for the header. */ 487 total_length = doff - EC_PKT_RDOFF; 488 buf += EC_PKT_RDOFF; 489 490 /* XXX - sometimes the card reports a large data offset. */ 491 if (total_length > (ETHER_MAX_LEN - ETHER_CRC_LEN)) { 492 #ifdef DEBUG 493 printf("%s: fixing too-large length of %d\n", 494 device_xname(sc->sc_dev), total_length); 495 #endif 496 total_length = (ETHER_MAX_LEN - ETHER_CRC_LEN); 497 } 498 499 MGETHDR(m0, M_DONTWAIT, MT_DATA); 500 if (m0 == NULL) 501 break; 502 m0->m_pkthdr.rcvif = ifp; 503 m0->m_pkthdr.len = total_length; 504 length = MHLEN; 505 m = m0; 506 507 while (total_length > 0) { 508 if (total_length >= MINCLSIZE) { 509 MCLGET(m, M_DONTWAIT); 510 if ((m->m_flags & M_EXT) == 0) 511 break; 512 length = MCLBYTES; 513 } 514 m->m_len = length = min(total_length, length); 515 ec_copyin(sc, mtod(m, uint8_t *), buf, length); 516 total_length -= length; 517 buf += length; 518 519 if (total_length > 0) { 520 MGET(newm, M_DONTWAIT, MT_DATA); 521 if (newm == NULL) 522 break; 523 length = MLEN; 524 m = m->m_next = newm; 525 } 526 } 527 break; 528 } 529 530 if (total_length == 0) { 531 ifp->if_ipackets++; 532 533 /* 534 * Check if there's a BPF listener on this interface. 535 * If so, hand off the raw packet to BPF. 536 */ 537 bpf_mtap(ifp, m0); 538 539 /* Pass the packet up. */ 540 (*ifp->if_input)(ifp, m0); 541 542 } else { 543 /* Something went wrong. */ 544 if (m0 != NULL) 545 m_freem(m0); 546 ifp->if_ierrors++; 547 } 548 549 /* Give the receive buffer back to the card. */ 550 buf = EC_CSR_INT_BUF(intbit); 551 bus_space_write_2(sc->sc_iot, sc->sc_ioh, buf, 0); 552 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_INTPA) | 553 EC_CSR_INT_BSW(intbit) | intbit); 554 } 555 556 int 557 ec_mediachange(struct ifnet *ifp) 558 { 559 560 return 0; 561 } 562 563 void 564 ec_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 565 { 566 567 if ((ifp->if_flags & IFF_UP) == 0) 568 return; 569 570 ifmr->ifm_status = IFM_AVALID | IFM_ACTIVE; 571 } 572 573 /* 574 * Process an ioctl request. This code needs some work - it looks pretty ugly. 575 */ 576 int 577 ec_ioctl(struct ifnet *ifp, u_long cmd, void *data) 578 { 579 struct ifaddr *ifa = (struct ifaddr *)data; 580 struct ifreq *ifr = (struct ifreq *)data; 581 struct ec_softc *sc = ifp->if_softc; 582 int s, error = 0; 583 584 s = splnet(); 585 586 switch (cmd) { 587 588 case SIOCINITIFADDR: 589 ifp->if_flags |= IFF_UP; 590 591 switch (ifa->ifa_addr->sa_family) { 592 #ifdef INET 593 case AF_INET: 594 ec_init(ifp); 595 arp_ifinit(ifp, ifa); 596 break; 597 #endif 598 default: 599 ec_init(ifp); 600 break; 601 } 602 break; 603 604 case SIOCSIFFLAGS: 605 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 606 break; 607 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 608 case IFF_RUNNING: 609 /* 610 * If interface is marked down and it is running, then 611 * stop it. 612 */ 613 ifp->if_flags &= ~IFF_RUNNING; 614 break; 615 case IFF_UP: 616 /* 617 * If interface is marked up and it is stopped, then 618 * start it. 619 */ 620 ec_init(ifp); 621 break; 622 default: 623 /* 624 * Some other important flag might have changed, so 625 * reset. 626 */ 627 ec_reset(ifp); 628 break; 629 } 630 break; 631 632 case SIOCGIFMEDIA: 633 case SIOCSIFMEDIA: 634 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 635 break; 636 637 default: 638 error = ether_ioctl(ifp, cmd, data); 639 break; 640 } 641 642 splx(s); 643 return error; 644 } 645 646 /* 647 * Collision routine. 648 */ 649 void 650 ec_coll(struct ec_softc *sc) 651 { 652 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 653 u_short jams; 654 struct mbuf *m0; 655 656 if ((++sc->sc_colliding) >= EC_COLLISIONS_JAMMED) { 657 sc->sc_ethercom.ec_if.if_oerrors++; 658 if (!sc->sc_jammed) 659 printf("%s: ethernet jammed\n", 660 device_xname(sc->sc_dev)); 661 sc->sc_jammed = 1; 662 sc->sc_colliding = 0; 663 ifp->if_flags &= ~IFF_OACTIVE; 664 IFQ_POLL(&ifp->if_snd, m0); 665 if (m0 != NULL) 666 ec_start(ifp); 667 } else { 668 jams = MAX(sc->sc_colliding, EC_BACKOFF_PRNG_COLL_MAX); 669 sc->sc_backoff_seed = 670 ((sc->sc_backoff_seed * EC_BACKOFF_PRNG_MUL) + 671 EC_BACKOFF_PRNG_ADD) & EC_BACKOFF_PRNG_MASK; 672 bus_space_write_2(sc->sc_iot, sc->sc_ioh, ECREG_BACKOFF, 673 -(((sc->sc_backoff_seed >> 8) & ~(-1 << jams)) + 1)); 674 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_INTPA) | 675 EC_CSR_JAM | EC_CSR_TINT | EC_CSR_JINT); 676 } 677 } 678 679 /* 680 * Device timeout routine. 681 */ 682 void 683 ec_watchdog(struct ifnet *ifp) 684 { 685 struct ec_softc *sc = ifp->if_softc; 686 687 log(LOG_ERR, "%s: device timeout\n", device_xname(sc->sc_dev)); 688 sc->sc_ethercom.ec_if.if_oerrors++; 689 690 ec_reset(ifp); 691 } 692
Indexes created Wed Oct 01 13:09:50 GMT 2025