if_ec.c revision 1.7
1 /* $NetBSD: if_ec.c,v 1.7 2003/01/20 15:03:03 bouyer 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * 3Com 3C400 device driver 41 */ 42 43 #include "opt_inet.h" 44 #include "opt_ns.h" 45 #include "bpfilter.h" 46 #include "rnd.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/errno.h> 51 #include <sys/ioctl.h> 52 #include <sys/mbuf.h> 53 #include <sys/socket.h> 54 #include <sys/syslog.h> 55 #include <sys/device.h> 56 #include <sys/endian.h> 57 #if NRND > 0 58 #include <sys/rnd.h> 59 #endif 60 61 #include <net/if.h> 62 #include <net/if_dl.h> 63 #include <net/if_types.h> 64 65 #include <net/if_ether.h> 66 #include <net/if_media.h> 67 68 #ifdef INET 69 #include <netinet/in.h> 70 #include <netinet/in_systm.h> 71 #include <netinet/in_var.h> 72 #include <netinet/ip.h> 73 #include <netinet/if_inarp.h> 74 #endif 75 76 #ifdef NS 77 #include <netns/ns.h> 78 #include <netns/ns_if.h> 79 #endif 80 81 #if NBPFILTER > 0 82 #include <net/bpf.h> 83 #include <net/bpfdesc.h> 84 #endif 85 86 #include <machine/cpu.h> 87 #include <machine/autoconf.h> 88 #include <machine/idprom.h> 89 #include <machine/bus.h> 90 #include <machine/intr.h> 91 92 #include <sun2/dev/if_ecreg.h> 93 94 /* 95 * Interface softc. 96 */ 97 struct ec_softc { 98 struct device sc_dev; 99 void *sc_ih; 100 101 struct ethercom sc_ethercom; /* ethernet common */ 102 struct ifmedia sc_media; /* our supported media */ 103 104 bus_space_tag_t sc_iot; /* bus space tag */ 105 bus_space_handle_t sc_ioh; /* bus space handle */ 106 107 u_char sc_jammed; /* nonzero if the net is jammed */ 108 u_char sc_colliding; /* nonzero if the net is colliding */ 109 u_int32_t sc_backoff_seed; /* seed for the backoff PRNG */ 110 111 #if NRND > 0 112 rndsource_element_t rnd_source; 113 #endif 114 }; 115 116 /* Macros to read and write the CSR. */ 117 #define ECREG_CSR_RD bus_space_read_2(sc->sc_iot, sc->sc_ioh, ECREG_CSR) 118 #define ECREG_CSR_WR(val) bus_space_write_2(sc->sc_iot, sc->sc_ioh, ECREG_CSR, val) 119 120 /* After this many collisions, the packet is dropped. */ 121 #define EC_COLLISIONS_JAMMED 16 122 123 /* 124 * Various constants used in the backoff pseudorandom 125 * number generator. 126 */ 127 #define EC_BACKOFF_PRNG_COLL_MAX 10 128 #define EC_BACKOFF_PRNG_MUL 1103515245 129 #define EC_BACKOFF_PRNG_ADD 12345 130 #define EC_BACKOFF_PRNG_MASK 0x7fffffff 131 132 /* 133 * Prototypes 134 */ 135 int ec_intr __P((void *)); 136 void ec_reset __P((struct ifnet *)); 137 int ec_init __P((struct ifnet *)); 138 int ec_ioctl __P((struct ifnet *, u_long, caddr_t)); 139 void ec_watchdog __P((struct ifnet *)); 140 void ec_start __P((struct ifnet *)); 141 142 void ec_recv __P((struct ec_softc *, int)); 143 void ec_coll __P((struct ec_softc *)); 144 void ec_copyin __P((struct ec_softc *, void *, int, size_t)); 145 void ec_copyout __P((struct ec_softc *, const void *, int, size_t)); 146 147 int ec_mediachange __P((struct ifnet *)); 148 void ec_mediastatus __P((struct ifnet *, struct ifmediareq *)); 149 150 int ec_match __P((struct device *, struct cfdata *, void *)); 151 void ec_attach __P((struct device *, struct device *, void *)); 152 153 CFATTACH_DECL(ec, sizeof(struct ec_softc), 154 ec_match, ec_attach, NULL, NULL); 155 156 /* 157 * Copy board memory to kernel. 158 */ 159 void 160 ec_copyin(sc, p, offset, size) 161 struct ec_softc *sc; 162 void *p; 163 int offset; 164 size_t size; 165 { 166 bus_space_copyin(sc->sc_iot, sc->sc_ioh, offset, p, size); 167 } 168 169 /* 170 * Copy from kernel space to board memory. 171 */ 172 void 173 ec_copyout(sc, p, offset, size) 174 struct ec_softc *sc; 175 const void *p; 176 int offset; 177 size_t size; 178 { 179 bus_space_copyout(sc->sc_iot, sc->sc_ioh, offset, p, size); 180 } 181 182 int 183 ec_match(parent, match, aux) 184 struct device *parent; 185 struct cfdata *match; 186 void *aux; 187 { 188 struct mbmem_attach_args *mbma = aux; 189 bus_space_handle_t bh; 190 int matched; 191 192 /* No default Multibus address. */ 193 if (mbma->mbma_paddr == -1) 194 return (0); 195 196 /* Make sure there is something there... */ 197 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, ECREG_BANK_SZ, 198 0, &bh)) 199 return (0); 200 matched = (bus_space_peek_2(mbma->mbma_bustag, bh, 0, NULL) == 0); 201 bus_space_unmap(mbma->mbma_bustag, bh, ECREG_BANK_SZ); 202 if (!matched) 203 return (0); 204 205 /* Default interrupt priority. */ 206 if (mbma->mbma_pri == -1) 207 mbma->mbma_pri = 3; 208 209 return (1); 210 } 211 212 void 213 ec_attach(parent, self, aux) 214 struct device *parent, *self; 215 void *aux; 216 { 217 struct ec_softc *sc = (void *) self; 218 struct mbmem_attach_args *mbma = aux; 219 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 220 u_int8_t myaddr[ETHER_ADDR_LEN]; 221 222 printf("\n"); 223 224 /* Map in the board control regs. */ 225 sc->sc_iot = mbma->mbma_bustag; 226 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, ECREG_BANK_SZ, 227 0, &sc->sc_ioh)) 228 panic("ec_attach: can't map regs"); 229 230 /* Reset the board. */ 231 ECREG_CSR_WR(EC_CSR_RESET); 232 delay(160); 233 234 /* 235 * Copy out the board ROM Ethernet address, 236 * and use the non-vendor-ID part to seed 237 * our backoff pseudorandom number generator. 238 */ 239 bus_space_read_region_1(sc->sc_iot, sc->sc_ioh, ECREG_AROM, myaddr, ETHER_ADDR_LEN); 240 sc->sc_backoff_seed = (myaddr[3] << 16) | (myaddr[4] << 8) | (myaddr[5]) | 1; 241 242 /* Initialize ifnet structure. */ 243 bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 244 ifp->if_softc = sc; 245 ifp->if_start = ec_start; 246 ifp->if_ioctl = ec_ioctl; 247 ifp->if_init = ec_init; 248 ifp->if_watchdog = ec_watchdog; 249 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS; 250 IFQ_SET_READY(&ifp->if_snd); 251 252 /* Initialize ifmedia structures. */ 253 ifmedia_init(&sc->sc_media, 0, ec_mediachange, ec_mediastatus); 254 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 255 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 256 257 /* Now we can attach the interface. */ 258 if_attach(ifp); 259 idprom_etheraddr(myaddr); 260 ether_ifattach(ifp, myaddr); 261 printf("%s: address %s\n", self->dv_xname, ether_sprintf(myaddr)); 262 263 bus_intr_establish(mbma->mbma_bustag, mbma->mbma_pri, IPL_NET, 0, 264 ec_intr, sc); 265 266 #if NRND > 0 267 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 268 RND_TYPE_NET, 0); 269 #endif 270 } 271 272 /* 273 * Reset interface. 274 */ 275 void 276 ec_reset(ifp) 277 struct ifnet *ifp; 278 { 279 int s; 280 281 s = splnet(); 282 ec_init(ifp); 283 splx(s); 284 } 285 286 287 /* 288 * Initialize interface. 289 */ 290 int 291 ec_init(ifp) 292 struct ifnet *ifp; 293 { 294 struct ec_softc *sc = ifp->if_softc; 295 296 /* Reset the board. */ 297 ECREG_CSR_WR(EC_CSR_RESET); 298 delay(160); 299 300 /* Set the Ethernet address. */ 301 bus_space_write_region_1(sc->sc_iot, sc->sc_ioh, ECREG_ARAM, LLADDR(sc->sc_ethercom.ec_if.if_sadl), ETHER_ADDR_LEN); 302 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_INTPA) | EC_CSR_AMSW); 303 ECREG_CSR_WR(ECREG_CSR_RD & 0); 304 305 /* Enable interrupts. */ 306 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_INTPA) | EC_CSR_BBSW | EC_CSR_ABSW | EC_CSR_BINT | EC_CSR_AINT | (ifp->if_flags & IFF_PROMISC ? EC_CSR_PROMISC : EC_CSR_PA)); 307 308 /* Set flags appropriately. */ 309 ifp->if_flags |= IFF_RUNNING; 310 ifp->if_flags &= ~IFF_OACTIVE; 311 312 /* Start output. */ 313 ec_start(ifp); 314 315 return (0); 316 } 317 318 /* 319 * Start output on interface. 320 */ 321 void 322 ec_start(ifp) 323 struct ifnet *ifp; 324 { 325 struct ec_softc *sc = ifp->if_softc; 326 struct mbuf *m, *m0; 327 int s; 328 u_int count, realcount; 329 bus_size_t off; 330 331 s = splnet(); 332 333 /* Don't do anything if output is active. */ 334 if ((ifp->if_flags & IFF_OACTIVE) != 0) { 335 splx(s); 336 return; 337 } 338 /* Don't do anything if the output queue is empty. */ 339 IFQ_DEQUEUE(&ifp->if_snd, m0); 340 if (m0 == NULL) { 341 splx(s); 342 return; 343 } 344 345 #if NBPFILTER > 0 346 /* The BPF tap. */ 347 if (ifp->if_bpf) 348 bpf_mtap(ifp->if_bpf, m0); 349 #endif 350 351 /* Size the packet. */ 352 for (count = EC_BUF_SZ, m = m0; m != NULL; m = m->m_next) 353 count -= m->m_len; 354 355 /* Copy the packet into the xmit buffer. */ 356 realcount = MIN(count, EC_PKT_MAXTDOFF); 357 bus_space_write_2(sc->sc_iot, sc->sc_ioh, ECREG_TBUF, realcount); 358 for (off = realcount, m = m0; m != 0; off += m->m_len, m = m->m_next) 359 ec_copyout(sc, mtod(m, u_int8_t *), ECREG_TBUF + off, m->m_len); 360 m_freem(m0); 361 #if 0 362 bus_space_set_region_1(sc->sc_iot, sc->sc_ioh, ECREG_TBUF + off, 0, 363 count - realcount); 364 #endif 365 w16zero((u_int8_t *)(ECREG_TBUF + off), count - realcount); 366 367 /* Enable the transmitter. */ 368 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_PA) | EC_CSR_TBSW | EC_CSR_TINT | EC_CSR_JINT); 369 ifp->if_flags |= IFF_OACTIVE; 370 371 /* Done. */ 372 splx(s); 373 } 374 375 /* 376 * Controller interrupt. 377 */ 378 int 379 ec_intr(arg) 380 void *arg; 381 { 382 struct ec_softc *sc = arg; 383 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 384 int recv_first; 385 int recv_second; 386 int retval; 387 struct mbuf *m0; 388 389 retval = 0; 390 391 /* Check for received packet(s). */ 392 recv_first = recv_second = 0; 393 switch (ECREG_CSR_RD & (EC_CSR_BBSW | EC_CSR_ABSW | EC_CSR_RBBA)) { 394 395 case (EC_CSR_BBSW | EC_CSR_ABSW): 396 case (EC_CSR_BBSW | EC_CSR_ABSW | EC_CSR_RBBA): 397 /* Neither buffer is full. Is this a transmit interrupt? 398 * Acknowledge the interrupt ourselves. */ 399 ECREG_CSR_WR(ECREG_CSR_RD & (EC_CSR_TINT | EC_CSR_JINT | EC_CSR_PAMASK)); 400 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_INTPA) | EC_CSR_BINT | EC_CSR_AINT); 401 break; 402 403 case EC_CSR_BBSW: 404 case (EC_CSR_BBSW | EC_CSR_RBBA): 405 /* Only the A buffer is full. */ 406 recv_first = EC_CSR_AINT; 407 break; 408 409 case EC_CSR_ABSW: 410 case (EC_CSR_ABSW | EC_CSR_RBBA): 411 /* Only the B buffer is full. */ 412 recv_first = EC_CSR_BINT; 413 break; 414 415 case 0: 416 /* Both the A buffer and the B buffer are full, and the A 417 * buffer is older than the B buffer. */ 418 recv_first = EC_CSR_AINT; 419 recv_second = EC_CSR_BINT; 420 break; 421 422 case EC_CSR_RBBA: 423 /* Both the A buffer and the B buffer are full, and the B 424 * buffer is older than the A buffer. */ 425 recv_first = EC_CSR_BINT; 426 recv_second = EC_CSR_AINT; 427 break; 428 } 429 430 /* Receive packets. */ 431 if (recv_first) { 432 433 /* Acknowledge the interrupt. */ 434 ECREG_CSR_WR(ECREG_CSR_RD & ((EC_CSR_BINT | EC_CSR_AINT | EC_CSR_TINT | EC_CSR_JINT | EC_CSR_PAMASK) ^ (recv_first | recv_second))); 435 436 /* Receive a packet. */ 437 ec_recv(sc, recv_first); 438 439 /* Receive a packet. */ 440 if (recv_second) 441 ec_recv(sc, recv_second); 442 443 retval++; 444 } 445 /* Check for a transmitted packet. */ 446 if (ifp->if_flags & IFF_OACTIVE) { 447 448 /* If we got a collision. */ 449 if (ECREG_CSR_RD & EC_CSR_JAM) { 450 ECREG_CSR_WR(ECREG_CSR_RD & (EC_CSR_BINT | EC_CSR_AINT | EC_CSR_PAMASK)); 451 sc->sc_ethercom.ec_if.if_collisions++; 452 retval++; 453 ec_coll(sc); 454 455 } 456 /* If we transmitted a packet. */ 457 else if ((ECREG_CSR_RD & EC_CSR_TBSW) == 0) { 458 ECREG_CSR_WR(ECREG_CSR_RD & (EC_CSR_BINT | EC_CSR_AINT | EC_CSR_PAMASK)); 459 retval++; 460 sc->sc_ethercom.ec_if.if_opackets++; 461 sc->sc_jammed = 0; 462 ifp->if_flags &= ~IFF_OACTIVE; 463 IFQ_POLL(&ifp->if_snd, m0); 464 if (m0 != NULL) 465 ec_start(ifp); 466 } 467 } else { 468 469 /* Make sure we disable transmitter interrupts. */ 470 ECREG_CSR_WR(ECREG_CSR_RD & (EC_CSR_BINT | EC_CSR_AINT | EC_CSR_PAMASK)); 471 } 472 473 return retval; 474 } 475 476 /* 477 * Read in a packet from the board. 478 */ 479 void 480 ec_recv(sc, intbit) 481 struct ec_softc *sc; 482 int intbit; 483 { 484 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 485 struct mbuf *m0, *m, *newm; 486 bus_size_t buf; 487 u_int16_t status; 488 u_int16_t doff; 489 int length, total_length; 490 491 buf = EC_CSR_INT_BUF(intbit); 492 493 /* Read in the packet status. */ 494 status = bus_space_read_2(sc->sc_iot, sc->sc_ioh, buf); 495 doff = status & EC_PKT_DOFF; 496 497 for (total_length = -1, m0 = 0;;) { 498 499 /* Check for an error. */ 500 if (status & (EC_PKT_FCSERR | EC_PKT_RGERR | EC_PKT_FRERR) || 501 doff < EC_PKT_MINRDOFF || 502 doff > EC_PKT_MAXRDOFF) { 503 printf("%s: garbled packet, status 0x%04x; dropping\n", 504 sc->sc_dev.dv_xname, (unsigned int) status); 505 break; 506 } 507 508 /* Adjust for the header. */ 509 total_length = doff - EC_PKT_RDOFF; 510 buf += EC_PKT_RDOFF; 511 512 /* XXX - sometimes the card reports a large data offset. */ 513 if (total_length > (ETHER_MAX_LEN - ETHER_CRC_LEN)) { 514 #ifdef DEBUG 515 printf("%s: fixing too-large length of %d\n", 516 sc->sc_dev.dv_xname, total_length); 517 #endif 518 total_length = (ETHER_MAX_LEN - ETHER_CRC_LEN); 519 } 520 521 MGETHDR(m0, M_DONTWAIT, MT_DATA); 522 if (m0 == 0) 523 break; 524 m0->m_pkthdr.rcvif = ifp; 525 m0->m_pkthdr.len = total_length; 526 length = MHLEN; 527 m = m0; 528 529 while (total_length > 0) { 530 if (total_length >= MINCLSIZE) { 531 MCLGET(m, M_DONTWAIT); 532 if ((m->m_flags & M_EXT) == 0) 533 break; 534 length = MCLBYTES; 535 } 536 m->m_len = length = min(total_length, length); 537 ec_copyin(sc, mtod(m, u_int8_t *), buf, length); 538 total_length -= length; 539 buf += length; 540 541 if (total_length > 0) { 542 MGET(newm, M_DONTWAIT, MT_DATA); 543 if (newm == 0) 544 break; 545 length = MLEN; 546 m = m->m_next = newm; 547 } 548 } 549 break; 550 } 551 552 if (total_length == 0) { 553 ifp->if_ipackets++; 554 555 #if NBPFILTER > 0 556 /* 557 * Check if there's a BPF listener on this interface. 558 * If so, hand off the raw packet to BPF. 559 */ 560 if (ifp->if_bpf) 561 bpf_mtap(ifp->if_bpf, m0); 562 #endif 563 564 /* Pass the packet up. */ 565 (*ifp->if_input) (ifp, m0); 566 567 } else { 568 /* Something went wrong. */ 569 if (m0) 570 m_freem(m0); 571 ifp->if_ierrors++; 572 } 573 574 /* Give the receive buffer back to the card. */ 575 buf = EC_CSR_INT_BUF(intbit); 576 bus_space_write_2(sc->sc_iot, sc->sc_ioh, buf, 0); 577 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_INTPA) | EC_CSR_INT_BSW(intbit) | intbit); 578 } 579 580 int 581 ec_mediachange(ifp) 582 struct ifnet *ifp; 583 { 584 return (0); 585 } 586 587 void 588 ec_mediastatus(ifp, ifmr) 589 struct ifnet *ifp; 590 struct ifmediareq *ifmr; 591 { 592 if ((ifp->if_flags & IFF_UP) == 0) 593 return; 594 595 ifmr->ifm_status = IFM_AVALID | IFM_ACTIVE; 596 } 597 598 /* 599 * Process an ioctl request. This code needs some work - it looks pretty ugly. 600 */ 601 int 602 ec_ioctl(ifp, cmd, data) 603 struct ifnet *ifp; 604 u_long cmd; 605 caddr_t data; 606 { 607 struct ifaddr *ifa = (struct ifaddr *) data; 608 struct ifreq *ifr = (struct ifreq *)data; 609 struct ec_softc *sc = ifp->if_softc; 610 int s, error = 0; 611 612 s = splnet(); 613 614 switch (cmd) { 615 616 case SIOCSIFADDR: 617 ifp->if_flags |= IFF_UP; 618 619 switch (ifa->ifa_addr->sa_family) { 620 #ifdef INET 621 case AF_INET: 622 ec_init(ifp); 623 arp_ifinit(ifp, ifa); 624 break; 625 #endif 626 #ifdef NS 627 /* XXX - This code is probably wrong. */ 628 case AF_NS: 629 { 630 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 631 632 if (ns_nullhost(*ina)) 633 ina->x_host = 634 *(union ns_host *) LLADDR(ifp->if_sadl); 635 else 636 bcopy(ina->x_host.c_host, LLADDR(ifp->if_sadl), 637 ETHER_ADDR_LEN); 638 /* Set new address. */ 639 ec_init(ifp); 640 break; 641 } 642 #endif 643 default: 644 ec_init(ifp); 645 break; 646 } 647 break; 648 649 case SIOCSIFFLAGS: 650 if ((ifp->if_flags & IFF_UP) == 0 && 651 (ifp->if_flags & IFF_RUNNING) != 0) { 652 /* 653 * If interface is marked down and it is running, then 654 * stop it. 655 */ 656 ifp->if_flags &= ~IFF_RUNNING; 657 } else if ((ifp->if_flags & IFF_UP) != 0 && 658 (ifp->if_flags & IFF_RUNNING) == 0) { 659 /* 660 * If interface is marked up and it is stopped, then 661 * start it. 662 */ 663 ec_init(ifp); 664 } else { 665 /* 666 * Some other important flag might have changed, so 667 * reset. 668 */ 669 ec_reset(ifp); 670 } 671 break; 672 673 case SIOCGIFMEDIA: 674 case SIOCSIFMEDIA: 675 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 676 break; 677 678 default: 679 error = EINVAL; 680 break; 681 } 682 683 splx(s); 684 return error; 685 } 686 687 /* 688 * Collision routine. 689 */ 690 void 691 ec_coll(sc) 692 struct ec_softc *sc; 693 { 694 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 695 u_short jams; 696 struct mbuf *m0; 697 698 if ((++sc->sc_colliding) >= EC_COLLISIONS_JAMMED) { 699 sc->sc_ethercom.ec_if.if_oerrors++; 700 if (!sc->sc_jammed) 701 printf("%s: ethernet jammed\n", 702 sc->sc_dev.dv_xname); 703 sc->sc_jammed = 1; 704 sc->sc_colliding = 0; 705 ifp->if_flags &= ~IFF_OACTIVE; 706 IFQ_POLL(&ifp->if_snd, m0); 707 if (m0 != NULL) 708 ec_start(ifp); 709 } else { 710 jams = MAX(sc->sc_colliding, EC_BACKOFF_PRNG_COLL_MAX); 711 sc->sc_backoff_seed = ((sc->sc_backoff_seed * EC_BACKOFF_PRNG_MUL) + EC_BACKOFF_PRNG_ADD) & EC_BACKOFF_PRNG_MASK; 712 bus_space_write_2(sc->sc_iot, sc->sc_ioh, ECREG_BACKOFF, -(((sc->sc_backoff_seed >> 8) & ~(-1 << jams)) + 1)); 713 ECREG_CSR_WR((ECREG_CSR_RD & EC_CSR_INTPA) | EC_CSR_JAM | EC_CSR_TINT | EC_CSR_JINT); 714 } 715 } 716 717 /* 718 * Device timeout routine. 719 */ 720 void 721 ec_watchdog(ifp) 722 struct ifnet *ifp; 723 { 724 struct ec_softc *sc = ifp->if_softc; 725 726 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 727 sc->sc_ethercom.ec_if.if_oerrors++; 728 729 ec_reset(ifp); 730 } 731
Indexes created Tue Sep 30 07:10:03 GMT 2025