1 /* $NetBSD: am79c950.c,v 1.49 2020/02/04 13:47:34 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 David Huang <khym@bga.com> 5 * All rights reserved. 6 * 7 * Portions of this code are based on code by Denton Gentry <denny1@home.com>, 8 * Charles M. Hannum, Yanagisawa Takeshi <yanagisw@aa.ap.titech.ac.jp>, and 9 * Jason R. Thorpe. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 */ 31 32 /* 33 * Driver for the AMD Am79C940 (MACE) ethernet chip, used for onboard 34 * ethernet on the Centris/Quadra 660av and Quadra 840av. 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: am79c950.c,v 1.49 2020/02/04 13:47:34 martin Exp $"); 39 40 #include "opt_inet.h" 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/mbuf.h> 45 #include <sys/buf.h> 46 #include <sys/protosw.h> 47 #include <sys/socket.h> 48 #include <sys/syslog.h> 49 #include <sys/ioctl.h> 50 #include <sys/errno.h> 51 #include <sys/device.h> 52 #include <sys/bus.h> 53 54 #include <net/if.h> 55 #include <net/if_dl.h> 56 #include <net/if_ether.h> 57 #include <net/if_media.h> 58 #include <net/bpf.h> 59 60 #ifdef INET 61 #include <netinet/in.h> 62 #include <netinet/if_inarp.h> 63 #include <netinet/in_systm.h> 64 #include <netinet/in_var.h> 65 #include <netinet/ip.h> 66 #endif 67 68 #include <macppc/dev/am79c950reg.h> 69 #include <macppc/dev/if_mcvar.h> 70 71 hide void mcwatchdog(struct ifnet *); 72 hide int mcinit(struct mc_softc *); 73 hide int mcstop(struct mc_softc *); 74 hide int mcioctl(struct ifnet *, u_long, void *); 75 hide void mcstart(struct ifnet *); 76 hide void mcreset(struct mc_softc *); 77 78 integrate u_int maceput(struct mc_softc *, struct mbuf *); 79 integrate void mc_tint(struct mc_softc *); 80 integrate void mace_read(struct mc_softc *, uint8_t *, int); 81 integrate struct mbuf *mace_get(struct mc_softc *, uint8_t *, int); 82 static void mace_calcladrf(struct ethercom *, uint8_t *); 83 static inline uint16_t ether_cmp(void *, void *); 84 static int mc_mediachange(struct ifnet *); 85 static void mc_mediastatus(struct ifnet *, struct ifmediareq *); 86 87 /* 88 * Compare two Ether/802 addresses for equality, inlined and 89 * unrolled for speed. Use this like memcmp(). 90 * 91 * XXX: Add <machine/inlines.h> for stuff like this? 92 * XXX: or maybe add it to libkern.h instead? 93 * 94 * "I'd love to have an inline assembler version of this." 95 * XXX: Who wanted that? mycroft? I wrote one, but this 96 * version in C is as good as hand-coded assembly. -gwr 97 * 98 * Please do NOT tweak this without looking at the actual 99 * assembly code generated before and after your tweaks! 100 */ 101 static inline uint16_t 102 ether_cmp(void *one, void *two) 103 { 104 register uint16_t *a = (u_short *) one; 105 register uint16_t *b = (u_short *) two; 106 register uint16_t diff; 107 108 #ifdef m68k 109 /* 110 * The post-increment-pointer form produces the best 111 * machine code for m68k. This was carefully tuned 112 * so it compiles to just 8 short (2-byte) op-codes! 113 */ 114 diff = *a++ - *b++; 115 diff |= *a++ - *b++; 116 diff |= *a++ - *b++; 117 #else 118 /* 119 * Most modern CPUs do better with a single expression. 120 * Note that short-cut evaluation is NOT helpful here, 121 * because it just makes the code longer, not faster! 122 */ 123 diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]); 124 #endif 125 126 return diff; 127 } 128 129 #define ETHER_CMP ether_cmp 130 131 /* 132 * Interface exists: make available by filling in network interface 133 * record. System will initialize the interface when it is ready 134 * to accept packets. 135 */ 136 int 137 mcsetup(struct mc_softc *sc, uint8_t *lladdr) 138 { 139 struct ifnet *ifp = &sc->sc_if; 140 141 /* Reset the chip and disable all interrupts */ 142 NIC_PUT(sc, MACE_BIUCC, SWRST); 143 DELAY(100); 144 NIC_PUT(sc, MACE_IMR, ~0); 145 146 memcpy(sc->sc_enaddr, lladdr, ETHER_ADDR_LEN); 147 printf(": address %s\n", ether_sprintf(lladdr)); 148 149 memcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ); 150 ifp->if_softc = sc; 151 ifp->if_ioctl = mcioctl; 152 ifp->if_start = mcstart; 153 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 154 ifp->if_watchdog = mcwatchdog; 155 156 /* Initialize ifmedia structures */ 157 sc->sc_ethercom.ec_ifmedia = &sc->sc_media; 158 ifmedia_init(&sc->sc_media, 0, mc_mediachange, mc_mediastatus); 159 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_MANUAL, 0, NULL); 160 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_MANUAL); 161 162 if_attach(ifp); 163 if_deferred_start_init(ifp, NULL); 164 ether_ifattach(ifp, lladdr); 165 166 return 0; 167 } 168 169 hide int 170 mcioctl(struct ifnet *ifp, u_long cmd, void *data) 171 { 172 struct mc_softc *sc = ifp->if_softc; 173 struct ifaddr *ifa; 174 175 int s = splnet(), err = 0; 176 177 switch (cmd) { 178 179 case SIOCINITIFADDR: 180 ifa = (struct ifaddr *)data; 181 ifp->if_flags |= IFF_UP; 182 mcinit(sc); 183 switch (ifa->ifa_addr->sa_family) { 184 #ifdef INET 185 case AF_INET: 186 arp_ifinit(ifp, ifa); 187 break; 188 #endif 189 default: 190 break; 191 } 192 break; 193 194 case SIOCSIFFLAGS: 195 if ((err = ifioctl_common(ifp, cmd, data)) != 0) 196 break; 197 /* XXX see the comment in ed_ioctl() about code re-use */ 198 if ((ifp->if_flags & IFF_UP) == 0 && 199 (ifp->if_flags & IFF_RUNNING) != 0) { 200 /* 201 * If interface is marked down and it is running, 202 * then stop it. 203 */ 204 mcstop(sc); 205 ifp->if_flags &= ~IFF_RUNNING; 206 } else if ((ifp->if_flags & IFF_UP) != 0 && 207 (ifp->if_flags & IFF_RUNNING) == 0) { 208 /* 209 * If interface is marked up and it is stopped, 210 * then start it. 211 */ 212 (void)mcinit(sc); 213 } else { 214 /* 215 * Reset the interface to pick up any other changes 216 * in flags 217 */ 218 mcreset(sc); 219 mcstart(ifp); 220 } 221 break; 222 223 case SIOCADDMULTI: 224 case SIOCDELMULTI: 225 if ((err = ether_ioctl(ifp, cmd, data)) == ENETRESET) { 226 /* 227 * Multicast list has changed; set the hardware 228 * filter accordingly. But remember UP flag! 229 */ 230 if (ifp->if_flags & IFF_RUNNING) 231 mcreset(sc); 232 err = 0; 233 } 234 break; 235 236 default: 237 err = ether_ioctl(ifp, cmd, data); 238 break; 239 } 240 splx(s); 241 return err; 242 } 243 244 /* 245 * Encapsulate a packet of type family for the local net. 246 */ 247 hide void 248 mcstart(struct ifnet *ifp) 249 { 250 struct mc_softc *sc = ifp->if_softc; 251 struct mbuf *m; 252 253 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 254 return; 255 256 while (1) { 257 if (ifp->if_flags & IFF_OACTIVE) 258 return; 259 260 IF_DEQUEUE(&ifp->if_snd, m); 261 if (m == 0) 262 return; 263 264 /* 265 * If bpf is listening on this interface, let it 266 * see the packet before we commit it to the wire. 267 */ 268 bpf_mtap(ifp, m, BPF_D_OUT); 269 270 /* Copy the mbuf chain into the transmit buffer. */ 271 ifp->if_flags |= IFF_OACTIVE; 272 maceput(sc, m); 273 274 if_statinc(ifp, if_opackets); /* # of pkts */ 275 } 276 } 277 278 /* 279 * Reset and restart the MACE. Called in case of fatal 280 * hardware/software errors. 281 */ 282 hide void 283 mcreset(struct mc_softc *sc) 284 { 285 mcstop(sc); 286 mcinit(sc); 287 } 288 289 hide int 290 mcinit(struct mc_softc *sc) 291 { 292 int s; 293 uint8_t maccc, ladrf[8]; 294 295 if (sc->sc_if.if_flags & IFF_RUNNING) 296 /* already running */ 297 return 0; 298 299 s = splnet(); 300 301 NIC_PUT(sc, MACE_BIUCC, sc->sc_biucc); 302 NIC_PUT(sc, MACE_FIFOCC, sc->sc_fifocc); 303 NIC_PUT(sc, MACE_IMR, ~0); /* Disable all interrupts */ 304 NIC_PUT(sc, MACE_PLSCC, sc->sc_plscc); 305 306 NIC_PUT(sc, MACE_UTR, RTRD); /* Disable reserved test registers */ 307 308 /* Set MAC address */ 309 NIC_PUT(sc, MACE_IAC, ADDRCHG); 310 while (NIC_GET(sc, MACE_IAC) & ADDRCHG) 311 ; 312 NIC_PUT(sc, MACE_IAC, PHYADDR); 313 bus_space_write_multi_1(sc->sc_regt, sc->sc_regh, MACE_REG(MACE_PADR), 314 sc->sc_enaddr, ETHER_ADDR_LEN); 315 316 /* Set logical address filter */ 317 mace_calcladrf(&sc->sc_ethercom, ladrf); 318 319 NIC_PUT(sc, MACE_IAC, ADDRCHG); 320 while (NIC_GET(sc, MACE_IAC) & ADDRCHG) 321 ; 322 NIC_PUT(sc, MACE_IAC, LOGADDR); 323 bus_space_write_multi_1(sc->sc_regt, sc->sc_regh, MACE_REG(MACE_LADRF), 324 ladrf, 8); 325 326 NIC_PUT(sc, MACE_XMTFC, APADXMT); 327 /* 328 * No need to autostrip padding on receive... Ethernet frames 329 * don't have a length field, unlike 802.3 frames, so the MACE 330 * can't figure out the length of the packet anyways. 331 */ 332 NIC_PUT(sc, MACE_RCVFC, 0); 333 334 maccc = ENXMT | ENRCV; 335 if (sc->sc_if.if_flags & IFF_PROMISC) 336 maccc |= PROM; 337 338 NIC_PUT(sc, MACE_MACCC, maccc); 339 340 if (sc->sc_bus_init) 341 (*sc->sc_bus_init)(sc); 342 343 /* 344 * Enable all interrupts except receive, since we use the DMA 345 * completion interrupt for that. 346 */ 347 NIC_PUT(sc, MACE_IMR, RCVINTM); 348 349 /* Flag interface as "running" */ 350 sc->sc_if.if_flags |= IFF_RUNNING; 351 sc->sc_if.if_flags &= ~IFF_OACTIVE; 352 353 splx(s); 354 return 0; 355 } 356 357 /* 358 * Close down an interface and free its buffers 359 * Called on final close of device, or if mcinit() fails part way through. 360 */ 361 hide int 362 mcstop(struct mc_softc *sc) 363 { 364 int s = splnet(); 365 366 NIC_PUT(sc, MACE_BIUCC, SWRST); 367 DELAY(100); 368 369 sc->sc_if.if_timer = 0; 370 sc->sc_if.if_flags &= ~IFF_RUNNING; 371 372 splx(s); 373 return 0; 374 } 375 376 /* 377 * Called if any Tx packets remain unsent after 5 seconds, 378 * In all cases we just reset the chip, and any retransmission 379 * will be handled by higher level protocol timeouts. 380 */ 381 hide void 382 mcwatchdog(struct ifnet *ifp) 383 { 384 struct mc_softc *sc = ifp->if_softc; 385 386 printf("mcwatchdog: resetting chip\n"); 387 mcreset(sc); 388 } 389 390 /* 391 * Stuff packet into MACE (at splnet) 392 */ 393 integrate u_int 394 maceput(struct mc_softc *sc, struct mbuf *m) 395 { 396 struct mbuf *n; 397 u_int len, totlen = 0; 398 u_char *buff; 399 400 buff = sc->sc_txbuf; 401 402 for (; m; m = n) { 403 u_char *data = mtod(m, u_char *); 404 len = m->m_len; 405 totlen += len; 406 memcpy(buff, data, len); 407 buff += len; 408 n = m_free(m); 409 } 410 411 if (totlen > PAGE_SIZE) 412 panic("%s: maceput: packet overflow", device_xname(sc->sc_dev)); 413 414 #if 0 415 if (totlen < ETHERMIN + sizeof(struct ether_header)) { 416 int pad = ETHERMIN + sizeof(struct ether_header) - totlen; 417 memset(sc->sc_txbuf + totlen, 0, pad); 418 totlen = ETHERMIN + sizeof(struct ether_header); 419 } 420 #endif 421 422 (*sc->sc_putpacket)(sc, totlen); 423 424 sc->sc_if.if_timer = 5; /* 5 seconds to watch for failing to transmit */ 425 return totlen; 426 } 427 428 int 429 mcintr(void *arg) 430 { 431 struct mc_softc *sc = arg; 432 uint8_t ir; 433 434 ir = NIC_GET(sc, MACE_IR) & ~NIC_GET(sc, MACE_IMR); 435 if (ir == 0) 436 return 0; 437 438 if (ir & JAB) { 439 #ifdef MCDEBUG 440 printf("%s: jabber error\n", device_xname(sc->sc_dev)); 441 #endif 442 if_statinc(&sc->sc_if, if_oerrors); 443 } 444 445 if (ir & BABL) { 446 #ifdef MCDEBUG 447 printf("%s: babble\n", device_xname(sc->sc_dev)); 448 #endif 449 if_statinc(&sc->sc_if, if_oerrors); 450 } 451 452 if (ir & CERR) { 453 printf("%s: collision error\n", device_xname(sc->sc_dev)); 454 if_statinc(&sc->sc_if, if_collisions); 455 } 456 457 /* 458 * Pretend we have carrier; if we don't this will be cleared 459 * shortly. 460 */ 461 sc->sc_havecarrier = 1; 462 463 if (ir & XMTINT) 464 mc_tint(sc); 465 466 if (ir & RCVINT) 467 mc_rint(sc); 468 469 return 1; 470 } 471 472 integrate void 473 mc_tint(struct mc_softc *sc) 474 { 475 uint8_t xmtfs; 476 477 (void)NIC_GET(sc, MACE_XMTRC); 478 xmtfs = NIC_GET(sc, MACE_XMTFS); 479 480 if ((xmtfs & XMTSV) == 0) 481 return; 482 483 if (xmtfs & UFLO) { 484 printf("%s: underflow\n", device_xname(sc->sc_dev)); 485 mcreset(sc); 486 return; 487 } 488 489 net_stat_ref_t nsr = IF_STAT_GETREF(&sc->sc_if); 490 if (xmtfs & LCOL) { 491 printf("%s: late collision\n", device_xname(sc->sc_dev)); 492 if_statinc_ref(nsr, if_oerrors); 493 if_statinc_ref(nsr, if_collisions); 494 } 495 496 if (xmtfs & MORE) 497 /* Real number is unknown. */ 498 if_statadd_ref(nsr, if_collisions, 2); 499 else if (xmtfs & ONE) 500 if_statinc_ref(nsr, if_collisions); 501 else if (xmtfs & RTRY) { 502 if_statadd_ref(nsr, if_collisions, 16); 503 if_statinc_ref(nsr, if_oerrors); 504 } 505 506 if (xmtfs & LCAR) { 507 sc->sc_havecarrier = 0; 508 printf("%s: lost carrier\n", device_xname(sc->sc_dev)); 509 if_statinc_ref(nsr, if_oerrors); 510 } 511 IF_STAT_PUTREF(&sc->sc_if); 512 513 sc->sc_if.if_flags &= ~IFF_OACTIVE; 514 sc->sc_if.if_timer = 0; 515 if_schedule_deferred_start(&sc->sc_if); 516 } 517 518 void 519 mc_rint(struct mc_softc *sc) 520 { 521 #define rxf sc->sc_rxframe 522 u_int len; 523 524 len = (rxf.rx_rcvcnt | ((rxf.rx_rcvsts & 0xf) << 8)) - 4; 525 526 #ifdef MCDEBUG 527 if (rxf.rx_rcvsts & 0xf0) 528 printf("%s: rcvcnt %02x rcvsts %02x rntpc 0x%02x rcvcc 0x%02x\n", 529 device_xname(sc->sc_dev), rxf.rx_rcvcnt, rxf.rx_rcvsts, 530 rxf.rx_rntpc, rxf.rx_rcvcc); 531 #endif 532 533 if (rxf.rx_rcvsts & OFLO) { 534 printf("%s: receive FIFO overflow\n", device_xname(sc->sc_dev)); 535 if_statinc(&sc->sc_if, if_ierrors); 536 return; 537 } 538 539 if (rxf.rx_rcvsts & CLSN) 540 if_statinc(&sc->sc_if, if_collisions); 541 542 if (rxf.rx_rcvsts & FRAM) { 543 #ifdef MCDEBUG 544 printf("%s: framing error\n", device_xname(sc->sc_dev)); 545 #endif 546 if_statinc(&sc->sc_if, if_ierrors); 547 return; 548 } 549 550 if (rxf.rx_rcvsts & FCS) { 551 #ifdef MCDEBUG 552 printf("%s: frame control checksum error\n", 553 device_xname(sc->sc_dev)); 554 #endif 555 if_statinc(&sc->sc_if, if_ierrors); 556 return; 557 } 558 559 mace_read(sc, rxf.rx_frame, len); 560 #undef rxf 561 } 562 563 integrate void 564 mace_read(struct mc_softc *sc, uint8_t *pkt, int len) 565 { 566 struct ifnet *ifp = &sc->sc_if; 567 struct mbuf *m; 568 569 if (len <= sizeof(struct ether_header) || 570 len > ETHERMTU + sizeof(struct ether_header)) { 571 #ifdef MCDEBUG 572 printf("%s: invalid packet size %d; dropping\n", 573 device_xname(sc->sc_dev), len); 574 #endif 575 if_statinc(ifp, if_ierrors); 576 return; 577 } 578 579 m = mace_get(sc, pkt, len); 580 if (m == NULL) { 581 if_statinc(ifp, if_ierrors); 582 return; 583 } 584 585 /* Pass the packet up. */ 586 if_percpuq_enqueue(ifp->if_percpuq, m); 587 } 588 589 /* 590 * Pull data off an interface. 591 * Len is length of data, with local net header stripped. 592 * We copy the data into mbufs. When full cluster sized units are present 593 * we copy into clusters. 594 */ 595 integrate struct mbuf * 596 mace_get(struct mc_softc *sc, uint8_t *pkt, int totlen) 597 { 598 register struct mbuf *m; 599 struct mbuf *top, **mp; 600 int len; 601 602 MGETHDR(m, M_DONTWAIT, MT_DATA); 603 if (m == 0) 604 return 0; 605 m_set_rcvif(m, &sc->sc_if); 606 m->m_pkthdr.len = totlen; 607 len = MHLEN; 608 top = 0; 609 mp = ⊤ 610 611 while (totlen > 0) { 612 if (top) { 613 MGET(m, M_DONTWAIT, MT_DATA); 614 if (m == 0) { 615 m_freem(top); 616 return 0; 617 } 618 len = MLEN; 619 } 620 if (totlen >= MINCLSIZE) { 621 MCLGET(m, M_DONTWAIT); 622 if ((m->m_flags & M_EXT) == 0) { 623 m_free(m); 624 m_freem(top); 625 return 0; 626 } 627 len = MCLBYTES; 628 } 629 m->m_len = len = uimin(totlen, len); 630 memcpy(mtod(m, void *), pkt, len); 631 pkt += len; 632 totlen -= len; 633 *mp = m; 634 mp = &m->m_next; 635 } 636 637 return top; 638 } 639 640 /* 641 * Go through the list of multicast addresses and calculate the logical 642 * address filter. 643 */ 644 void 645 mace_calcladrf(struct ethercom *ec, uint8_t *af) 646 { 647 struct ifnet *ifp = &ec->ec_if; 648 struct ether_multi *enm; 649 register u_char *cp, c; 650 register uint32_t crc; 651 register int i, len; 652 struct ether_multistep step; 653 654 /* 655 * Set up multicast address filter by passing all multicast addresses 656 * through a crc generator, and then using the high order 6 bits as an 657 * index into the 64 bit logical address filter. The high order bit 658 * selects the word, while the rest of the bits select the bit within 659 * the word. 660 */ 661 662 *((uint32_t *)af) = *((uint32_t *)af + 1) = 0; 663 664 ETHER_LOCK(ec); 665 ETHER_FIRST_MULTI(step, ec, enm); 666 while (enm != NULL) { 667 if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) { 668 /* 669 * We must listen to a range of multicast addresses. 670 * For now, just accept all multicasts, rather than 671 * trying to set only those filter bits needed to match 672 * the range. (At this time, the only use of address 673 * ranges is for IP multicast routing, for which the 674 * range is big enough to require all bits set.) 675 */ 676 ETHER_UNLOCK(ec); 677 goto allmulti; 678 } 679 680 cp = enm->enm_addrlo; 681 crc = 0xffffffff; 682 for (len = sizeof(enm->enm_addrlo); --len >= 0;) { 683 c = *cp++; 684 for (i = 8; --i >= 0;) { 685 if ((crc & 0x01) ^ (c & 0x01)) { 686 crc >>= 1; 687 crc ^= 0xedb88320; 688 } else 689 crc >>= 1; 690 c >>= 1; 691 } 692 } 693 /* Just want the 6 most significant bits. */ 694 crc >>= 26; 695 696 /* Set the corresponding bit in the filter. */ 697 af[crc >> 3] |= 1 << (crc & 7); 698 699 ETHER_NEXT_MULTI(step, enm); 700 } 701 ETHER_UNLOCK(ec); 702 ifp->if_flags &= ~IFF_ALLMULTI; 703 return; 704 705 allmulti: 706 ifp->if_flags |= IFF_ALLMULTI; 707 *((uint32_t *)af) = *((uint32_t *)af + 1) = 0xffffffff; 708 } 709 710 int 711 mc_mediachange(struct ifnet *ifp) 712 { 713 return EINVAL; 714 } 715 716 void 717 mc_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 718 { 719 struct mc_softc *sc = ifp->if_softc; 720 721 if ((ifp->if_flags & IFF_UP) == 0) 722 return; 723 724 if (sc->sc_havecarrier) 725 ifmr->ifm_status |= IFM_ACTIVE; 726 } 727