am79c950.c revision 1.38.12.2
1 /* $NetBSD: am79c950.c,v 1.38.12.2 2018/07/28 04:37:36 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 David Huang <khym (at) bga.com> 5 * All rights reserved. 6 * 7 * Portions of this code are based on code by Denton Gentry <denny1 (at) home.com>, 8 * Charles M. Hannum, Yanagisawa Takeshi <yanagisw (at) 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 1.38.12.2 2018/07/28 04:37:36 pgoyette 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 53 #include <net/if.h> 54 #include <net/if_dl.h> 55 #include <net/if_ether.h> 56 #include <net/if_media.h> 57 #include <net/bpf.h> 58 59 #ifdef INET 60 #include <netinet/in.h> 61 #include <netinet/if_inarp.h> 62 #include <netinet/in_systm.h> 63 #include <netinet/in_var.h> 64 #include <netinet/ip.h> 65 #endif 66 67 #include <sys/bus.h> 68 69 #include <macppc/dev/am79c950reg.h> 70 #include <macppc/dev/if_mcvar.h> 71 72 hide void mcwatchdog(struct ifnet *); 73 hide int mcinit(struct mc_softc *sc); 74 hide int mcstop(struct mc_softc *sc); 75 hide int mcioctl(struct ifnet *ifp, u_long cmd, void *data); 76 hide void mcstart(struct ifnet *ifp); 77 hide void mcreset(struct mc_softc *sc); 78 79 integrate u_int maceput(struct mc_softc *sc, struct mbuf *m0); 80 integrate void mc_tint(struct mc_softc *sc); 81 integrate void mace_read(struct mc_softc *, uint8_t *, int); 82 integrate struct mbuf *mace_get(struct mc_softc *, uint8_t *, int); 83 static void mace_calcladrf(struct ethercom *ac, u_int8_t *af); 84 static inline u_int16_t ether_cmp(void *, void *); 85 static int mc_mediachange(struct ifnet *); 86 static void mc_mediastatus(struct ifnet *, struct ifmediareq *); 87 88 /* 89 * Compare two Ether/802 addresses for equality, inlined and 90 * unrolled for speed. Use this like memcmp(). 91 * 92 * XXX: Add <machine/inlines.h> for stuff like this? 93 * XXX: or maybe add it to libkern.h instead? 94 * 95 * "I'd love to have an inline assembler version of this." 96 * XXX: Who wanted that? mycroft? I wrote one, but this 97 * version in C is as good as hand-coded assembly. -gwr 98 * 99 * Please do NOT tweak this without looking at the actual 100 * assembly code generated before and after your tweaks! 101 */ 102 static inline u_int16_t 103 ether_cmp(void *one, void *two) 104 { 105 register u_int16_t *a = (u_short *) one; 106 register u_int16_t *b = (u_short *) two; 107 register u_int16_t diff; 108 109 #ifdef m68k 110 /* 111 * The post-increment-pointer form produces the best 112 * machine code for m68k. This was carefully tuned 113 * so it compiles to just 8 short (2-byte) op-codes! 114 */ 115 diff = *a++ - *b++; 116 diff |= *a++ - *b++; 117 diff |= *a++ - *b++; 118 #else 119 /* 120 * Most modern CPUs do better with a single expresion. 121 * Note that short-cut evaluation is NOT helpful here, 122 * because it just makes the code longer, not faster! 123 */ 124 diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]); 125 #endif 126 127 return (diff); 128 } 129 130 #define ETHER_CMP ether_cmp 131 132 /* 133 * Interface exists: make available by filling in network interface 134 * record. System will initialize the interface when it is ready 135 * to accept packets. 136 */ 137 int 138 mcsetup(struct mc_softc *sc, u_int8_t *lladdr) 139 { 140 struct ifnet *ifp = &sc->sc_if; 141 142 /* reset the chip and disable all interrupts */ 143 NIC_PUT(sc, MACE_BIUCC, SWRST); 144 DELAY(100); 145 NIC_PUT(sc, MACE_IMR, ~0); 146 147 memcpy(sc->sc_enaddr, lladdr, ETHER_ADDR_LEN); 148 printf(": address %s\n", ether_sprintf(lladdr)); 149 150 memcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ); 151 ifp->if_softc = sc; 152 ifp->if_ioctl = mcioctl; 153 ifp->if_start = mcstart; 154 ifp->if_flags = 155 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 156 ifp->if_watchdog = mcwatchdog; 157 158 /* initialize ifmedia structures */ 159 ifmedia_init(&sc->sc_media, 0, mc_mediachange, mc_mediastatus); 160 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 161 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 162 163 if_attach(ifp); 164 if_deferred_start_init(ifp, NULL); 165 ether_ifattach(ifp, lladdr); 166 167 return (0); 168 } 169 170 hide int 171 mcioctl(struct ifnet *ifp, u_long cmd, void *data) 172 { 173 struct mc_softc *sc = ifp->if_softc; 174 struct ifaddr *ifa; 175 struct ifreq *ifr; 176 177 int s = splnet(), err = 0; 178 179 switch (cmd) { 180 181 case SIOCINITIFADDR: 182 ifa = (struct ifaddr *)data; 183 ifp->if_flags |= IFF_UP; 184 mcinit(sc); 185 switch (ifa->ifa_addr->sa_family) { 186 #ifdef INET 187 case AF_INET: 188 arp_ifinit(ifp, ifa); 189 break; 190 #endif 191 default: 192 break; 193 } 194 break; 195 196 case SIOCSIFFLAGS: 197 if ((err = ifioctl_common(ifp, cmd, data)) != 0) 198 break; 199 /* XXX see the comment in ed_ioctl() about code re-use */ 200 if ((ifp->if_flags & IFF_UP) == 0 && 201 (ifp->if_flags & IFF_RUNNING) != 0) { 202 /* 203 * If interface is marked down and it is running, 204 * then stop it. 205 */ 206 mcstop(sc); 207 ifp->if_flags &= ~IFF_RUNNING; 208 } else if ((ifp->if_flags & IFF_UP) != 0 && 209 (ifp->if_flags & IFF_RUNNING) == 0) { 210 /* 211 * If interface is marked up and it is stopped, 212 * then start it. 213 */ 214 (void)mcinit(sc); 215 } else { 216 /* 217 * reset the interface to pick up any other changes 218 * in flags 219 */ 220 mcreset(sc); 221 mcstart(ifp); 222 } 223 break; 224 225 case SIOCADDMULTI: 226 case SIOCDELMULTI: 227 if ((err = ether_ioctl(ifp, cmd, data)) == ENETRESET) { 228 /* 229 * Multicast list has changed; set the hardware 230 * filter accordingly. But remember UP flag! 231 */ 232 if (ifp->if_flags & IFF_RUNNING) 233 mcreset(sc); 234 err = 0; 235 } 236 break; 237 238 case SIOCGIFMEDIA: 239 case SIOCSIFMEDIA: 240 ifr = (struct ifreq *) data; 241 err = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 242 break; 243 244 default: 245 err = ether_ioctl(ifp, cmd, data); 246 break; 247 } 248 splx(s); 249 return (err); 250 } 251 252 /* 253 * Encapsulate a packet of type family for the local net. 254 */ 255 hide void 256 mcstart(struct ifnet *ifp) 257 { 258 struct mc_softc *sc = ifp->if_softc; 259 struct mbuf *m; 260 261 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 262 return; 263 264 while (1) { 265 if (ifp->if_flags & IFF_OACTIVE) 266 return; 267 268 IF_DEQUEUE(&ifp->if_snd, m); 269 if (m == 0) 270 return; 271 272 /* 273 * If bpf is listening on this interface, let it 274 * see the packet before we commit it to the wire. 275 */ 276 bpf_mtap(ifp, m, BPF_D_OUT); 277 278 /* 279 * Copy the mbuf chain into the transmit buffer. 280 */ 281 ifp->if_flags |= IFF_OACTIVE; 282 maceput(sc, m); 283 284 ifp->if_opackets++; /* # of pkts */ 285 } 286 } 287 288 /* 289 * reset and restart the MACE. Called in case of fatal 290 * hardware/software errors. 291 */ 292 hide void 293 mcreset(struct mc_softc *sc) 294 { 295 mcstop(sc); 296 mcinit(sc); 297 } 298 299 hide int 300 mcinit(struct mc_softc *sc) 301 { 302 int s; 303 u_int8_t maccc, ladrf[8]; 304 305 if (sc->sc_if.if_flags & IFF_RUNNING) 306 /* already running */ 307 return (0); 308 309 s = splnet(); 310 311 NIC_PUT(sc, MACE_BIUCC, sc->sc_biucc); 312 NIC_PUT(sc, MACE_FIFOCC, sc->sc_fifocc); 313 NIC_PUT(sc, MACE_IMR, ~0); /* disable all interrupts */ 314 NIC_PUT(sc, MACE_PLSCC, sc->sc_plscc); 315 316 NIC_PUT(sc, MACE_UTR, RTRD); /* disable reserved test registers */ 317 318 /* set MAC address */ 319 NIC_PUT(sc, MACE_IAC, ADDRCHG); 320 while (NIC_GET(sc, MACE_IAC) & ADDRCHG) 321 ; 322 NIC_PUT(sc, MACE_IAC, PHYADDR); 323 bus_space_write_multi_1(sc->sc_regt, sc->sc_regh, MACE_REG(MACE_PADR), 324 sc->sc_enaddr, ETHER_ADDR_LEN); 325 326 /* set logical address filter */ 327 mace_calcladrf(&sc->sc_ethercom, ladrf); 328 329 NIC_PUT(sc, MACE_IAC, ADDRCHG); 330 while (NIC_GET(sc, MACE_IAC) & ADDRCHG) 331 ; 332 NIC_PUT(sc, MACE_IAC, LOGADDR); 333 bus_space_write_multi_1(sc->sc_regt, sc->sc_regh, MACE_REG(MACE_LADRF), 334 ladrf, 8); 335 336 NIC_PUT(sc, MACE_XMTFC, APADXMT); 337 /* 338 * No need to autostrip padding on receive... Ethernet frames 339 * don't have a length field, unlike 802.3 frames, so the MACE 340 * can't figure out the length of the packet anyways. 341 */ 342 NIC_PUT(sc, MACE_RCVFC, 0); 343 344 maccc = ENXMT | ENRCV; 345 if (sc->sc_if.if_flags & IFF_PROMISC) 346 maccc |= PROM; 347 348 NIC_PUT(sc, MACE_MACCC, maccc); 349 350 if (sc->sc_bus_init) 351 (*sc->sc_bus_init)(sc); 352 353 /* 354 * Enable all interrupts except receive, since we use the DMA 355 * completion interrupt for that. 356 */ 357 NIC_PUT(sc, MACE_IMR, RCVINTM); 358 359 /* flag interface as "running" */ 360 sc->sc_if.if_flags |= IFF_RUNNING; 361 sc->sc_if.if_flags &= ~IFF_OACTIVE; 362 363 splx(s); 364 return (0); 365 } 366 367 /* 368 * close down an interface and free its buffers 369 * Called on final close of device, or if mcinit() fails 370 * part way through. 371 */ 372 hide int 373 mcstop(struct mc_softc *sc) 374 { 375 int s = splnet(); 376 377 NIC_PUT(sc, MACE_BIUCC, SWRST); 378 DELAY(100); 379 380 sc->sc_if.if_timer = 0; 381 sc->sc_if.if_flags &= ~IFF_RUNNING; 382 383 splx(s); 384 return (0); 385 } 386 387 /* 388 * Called if any Tx packets remain unsent after 5 seconds, 389 * In all cases we just reset the chip, and any retransmission 390 * will be handled by higher level protocol timeouts. 391 */ 392 hide void 393 mcwatchdog(struct ifnet *ifp) 394 { 395 struct mc_softc *sc = ifp->if_softc; 396 397 printf("mcwatchdog: resetting chip\n"); 398 mcreset(sc); 399 } 400 401 /* 402 * stuff packet into MACE (at splnet) 403 */ 404 integrate u_int 405 maceput(struct mc_softc *sc, struct mbuf *m) 406 { 407 struct mbuf *n; 408 u_int len, totlen = 0; 409 u_char *buff; 410 411 buff = sc->sc_txbuf; 412 413 for (; m; m = n) { 414 u_char *data = mtod(m, u_char *); 415 len = m->m_len; 416 totlen += len; 417 memcpy(buff, data, len); 418 buff += len; 419 n = m_free(m); 420 } 421 422 if (totlen > PAGE_SIZE) 423 panic("%s: maceput: packet overflow", device_xname(sc->sc_dev)); 424 425 #if 0 426 if (totlen < ETHERMIN + sizeof(struct ether_header)) { 427 int pad = ETHERMIN + sizeof(struct ether_header) - totlen; 428 memset(sc->sc_txbuf + totlen, 0, pad); 429 totlen = ETHERMIN + sizeof(struct ether_header); 430 } 431 #endif 432 433 (*sc->sc_putpacket)(sc, totlen); 434 435 sc->sc_if.if_timer = 5; /* 5 seconds to watch for failing to transmit */ 436 return (totlen); 437 } 438 439 int 440 mcintr(void *arg) 441 { 442 struct mc_softc *sc = arg; 443 u_int8_t ir; 444 445 ir = NIC_GET(sc, MACE_IR) & ~NIC_GET(sc, MACE_IMR); 446 if (ir == 0) 447 return 0; 448 449 if (ir & JAB) { 450 #ifdef MCDEBUG 451 printf("%s: jabber error\n", device_xname(sc->sc_dev)); 452 #endif 453 sc->sc_if.if_oerrors++; 454 } 455 456 if (ir & BABL) { 457 #ifdef MCDEBUG 458 printf("%s: babble\n", device_xname(sc->sc_dev)); 459 #endif 460 sc->sc_if.if_oerrors++; 461 } 462 463 if (ir & CERR) { 464 printf("%s: collision error\n", device_xname(sc->sc_dev)); 465 sc->sc_if.if_collisions++; 466 } 467 468 /* 469 * Pretend we have carrier; if we don't this will be cleared 470 * shortly. 471 */ 472 sc->sc_havecarrier = 1; 473 474 if (ir & XMTINT) 475 mc_tint(sc); 476 477 if (ir & RCVINT) 478 mc_rint(sc); 479 480 return 1; 481 } 482 483 integrate void 484 mc_tint(struct mc_softc *sc) 485 { 486 u_int8_t xmtfs; 487 488 (void)NIC_GET(sc, MACE_XMTRC); 489 xmtfs = NIC_GET(sc, MACE_XMTFS); 490 491 if ((xmtfs & XMTSV) == 0) 492 return; 493 494 if (xmtfs & UFLO) { 495 printf("%s: underflow\n", device_xname(sc->sc_dev)); 496 mcreset(sc); 497 return; 498 } 499 500 if (xmtfs & LCOL) { 501 printf("%s: late collision\n", device_xname(sc->sc_dev)); 502 sc->sc_if.if_oerrors++; 503 sc->sc_if.if_collisions++; 504 } 505 506 if (xmtfs & MORE) 507 /* Real number is unknown. */ 508 sc->sc_if.if_collisions += 2; 509 else if (xmtfs & ONE) 510 sc->sc_if.if_collisions++; 511 else if (xmtfs & RTRY) { 512 sc->sc_if.if_collisions += 16; 513 sc->sc_if.if_oerrors++; 514 } 515 516 if (xmtfs & LCAR) { 517 sc->sc_havecarrier = 0; 518 printf("%s: lost carrier\n", device_xname(sc->sc_dev)); 519 sc->sc_if.if_oerrors++; 520 } 521 522 sc->sc_if.if_flags &= ~IFF_OACTIVE; 523 sc->sc_if.if_timer = 0; 524 if_schedule_deferred_start(&sc->sc_if); 525 } 526 527 void 528 mc_rint(struct mc_softc *sc) 529 { 530 #define rxf sc->sc_rxframe 531 u_int len; 532 533 len = (rxf.rx_rcvcnt | ((rxf.rx_rcvsts & 0xf) << 8)) - 4; 534 535 #ifdef MCDEBUG 536 if (rxf.rx_rcvsts & 0xf0) 537 printf("%s: rcvcnt %02x rcvsts %02x rntpc 0x%02x rcvcc 0x%02x\n", 538 device_xname(sc->sc_dev), rxf.rx_rcvcnt, rxf.rx_rcvsts, 539 rxf.rx_rntpc, rxf.rx_rcvcc); 540 #endif 541 542 if (rxf.rx_rcvsts & OFLO) { 543 printf("%s: receive FIFO overflow\n", device_xname(sc->sc_dev)); 544 sc->sc_if.if_ierrors++; 545 return; 546 } 547 548 if (rxf.rx_rcvsts & CLSN) 549 sc->sc_if.if_collisions++; 550 551 if (rxf.rx_rcvsts & FRAM) { 552 #ifdef MCDEBUG 553 printf("%s: framing error\n", device_xname(sc->sc_dev)); 554 #endif 555 sc->sc_if.if_ierrors++; 556 return; 557 } 558 559 if (rxf.rx_rcvsts & FCS) { 560 #ifdef MCDEBUG 561 printf("%s: frame control checksum error\n", device_xname(sc->sc_dev)); 562 #endif 563 sc->sc_if.if_ierrors++; 564 return; 565 } 566 567 mace_read(sc, rxf.rx_frame, len); 568 #undef rxf 569 } 570 571 integrate void 572 mace_read(struct mc_softc *sc, uint8_t *pkt, int len) 573 { 574 struct ifnet *ifp = &sc->sc_if; 575 struct mbuf *m; 576 577 if (len <= sizeof(struct ether_header) || 578 len > ETHERMTU + sizeof(struct ether_header)) { 579 #ifdef MCDEBUG 580 printf("%s: invalid packet size %d; dropping\n", 581 device_xname(sc->sc_dev), len); 582 #endif 583 ifp->if_ierrors++; 584 return; 585 } 586 587 m = mace_get(sc, pkt, len); 588 if (m == NULL) { 589 ifp->if_ierrors++; 590 return; 591 } 592 593 /* Pass the packet up. */ 594 if_percpuq_enqueue(ifp->if_percpuq, m); 595 } 596 597 /* 598 * Pull data off an interface. 599 * Len is length of data, with local net header stripped. 600 * We copy the data into mbufs. When full cluster sized units are present 601 * we copy into clusters. 602 */ 603 integrate struct mbuf * 604 mace_get(struct mc_softc *sc, uint8_t *pkt, int totlen) 605 { 606 register struct mbuf *m; 607 struct mbuf *top, **mp; 608 int len; 609 610 MGETHDR(m, M_DONTWAIT, MT_DATA); 611 if (m == 0) 612 return (0); 613 m_set_rcvif(m, &sc->sc_if); 614 m->m_pkthdr.len = totlen; 615 len = MHLEN; 616 top = 0; 617 mp = ⊤ 618 619 while (totlen > 0) { 620 if (top) { 621 MGET(m, M_DONTWAIT, MT_DATA); 622 if (m == 0) { 623 m_freem(top); 624 return 0; 625 } 626 len = MLEN; 627 } 628 if (totlen >= MINCLSIZE) { 629 MCLGET(m, M_DONTWAIT); 630 if ((m->m_flags & M_EXT) == 0) { 631 m_free(m); 632 m_freem(top); 633 return 0; 634 } 635 len = MCLBYTES; 636 } 637 m->m_len = len = min(totlen, len); 638 memcpy(mtod(m, void *), pkt, len); 639 pkt += len; 640 totlen -= len; 641 *mp = m; 642 mp = &m->m_next; 643 } 644 645 return (top); 646 } 647 648 /* 649 * Go through the list of multicast addresses and calculate the logical 650 * address filter. 651 */ 652 void 653 mace_calcladrf(struct ethercom *ac, u_int8_t *af) 654 { 655 struct ifnet *ifp = &ac->ec_if; 656 struct ether_multi *enm; 657 register u_char *cp, c; 658 register u_int32_t crc; 659 register int i, len; 660 struct ether_multistep step; 661 662 /* 663 * Set up multicast address filter by passing all multicast addresses 664 * through a crc generator, and then using the high order 6 bits as an 665 * index into the 64 bit logical address filter. The high order bit 666 * selects the word, while the rest of the bits select the bit within 667 * the word. 668 */ 669 670 *((u_int32_t *)af) = *((u_int32_t *)af + 1) = 0; 671 672 ETHER_FIRST_MULTI(step, ac, enm); 673 while (enm != NULL) { 674 if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) { 675 /* 676 * We must listen to a range of multicast addresses. 677 * For now, just accept all multicasts, rather than 678 * trying to set only those filter bits needed to match 679 * the range. (At this time, the only use of address 680 * ranges is for IP multicast routing, for which the 681 * range is big enough to require all bits set.) 682 */ 683 goto allmulti; 684 } 685 686 cp = enm->enm_addrlo; 687 crc = 0xffffffff; 688 for (len = sizeof(enm->enm_addrlo); --len >= 0;) { 689 c = *cp++; 690 for (i = 8; --i >= 0;) { 691 if ((crc & 0x01) ^ (c & 0x01)) { 692 crc >>= 1; 693 crc ^= 0xedb88320; 694 } else 695 crc >>= 1; 696 c >>= 1; 697 } 698 } 699 /* Just want the 6 most significant bits. */ 700 crc >>= 26; 701 702 /* Set the corresponding bit in the filter. */ 703 af[crc >> 3] |= 1 << (crc & 7); 704 705 ETHER_NEXT_MULTI(step, enm); 706 } 707 ifp->if_flags &= ~IFF_ALLMULTI; 708 return; 709 710 allmulti: 711 ifp->if_flags |= IFF_ALLMULTI; 712 *((u_int32_t *)af) = *((u_int32_t *)af + 1) = 0xffffffff; 713 } 714 715 int 716 mc_mediachange(struct ifnet *ifp) 717 { 718 return EINVAL; 719 } 720 721 void 722 mc_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 723 { 724 struct mc_softc *sc = ifp->if_softc; 725 726 if ((ifp->if_flags & IFF_UP) == 0) 727 return; 728 729 if (sc->sc_havecarrier) 730 ifmr->ifm_status |= IFM_ACTIVE; 731 } 732
Indexes created Mon Oct 20 11:09:49 GMT 2025