smc83c170.c revision 1.35
1 /* $NetBSD: smc83c170.c,v 1.35 2000/10/15 20:00:50 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 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. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Device driver for the Standard Microsystems Corp. 83C170 42 * Ethernet PCI Integrated Controller (EPIC/100). 43 */ 44 45 #include "opt_inet.h" 46 #include "opt_ns.h" 47 #include "bpfilter.h" 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/callout.h> 52 #include <sys/mbuf.h> 53 #include <sys/malloc.h> 54 #include <sys/kernel.h> 55 #include <sys/socket.h> 56 #include <sys/ioctl.h> 57 #include <sys/errno.h> 58 #include <sys/device.h> 59 60 #include <net/if.h> 61 #include <net/if_dl.h> 62 #include <net/if_media.h> 63 #include <net/if_ether.h> 64 65 #if NBPFILTER > 0 66 #include <net/bpf.h> 67 #endif 68 69 #ifdef INET 70 #include <netinet/in.h> 71 #include <netinet/if_inarp.h> 72 #endif 73 74 #ifdef NS 75 #include <netns/ns.h> 76 #include <netns/ns_if.h> 77 #endif 78 79 #include <machine/bus.h> 80 #include <machine/intr.h> 81 82 #include <dev/mii/miivar.h> 83 84 #include <dev/ic/smc83c170reg.h> 85 #include <dev/ic/smc83c170var.h> 86 87 void epic_start __P((struct ifnet *)); 88 void epic_watchdog __P((struct ifnet *)); 89 int epic_ioctl __P((struct ifnet *, u_long, caddr_t)); 90 int epic_init __P((struct ifnet *)); 91 void epic_stop __P((struct ifnet *, int)); 92 93 void epic_shutdown __P((void *)); 94 95 void epic_reset __P((struct epic_softc *)); 96 void epic_rxdrain __P((struct epic_softc *)); 97 int epic_add_rxbuf __P((struct epic_softc *, int)); 98 void epic_read_eeprom __P((struct epic_softc *, int, int, u_int16_t *)); 99 void epic_set_mchash __P((struct epic_softc *)); 100 void epic_fixup_clock_source __P((struct epic_softc *)); 101 int epic_mii_read __P((struct device *, int, int)); 102 void epic_mii_write __P((struct device *, int, int, int)); 103 int epic_mii_wait __P((struct epic_softc *, u_int32_t)); 104 void epic_tick __P((void *)); 105 106 void epic_statchg __P((struct device *)); 107 int epic_mediachange __P((struct ifnet *)); 108 void epic_mediastatus __P((struct ifnet *, struct ifmediareq *)); 109 110 #define INTMASK (INTSTAT_FATAL_INT | INTSTAT_TXU | \ 111 INTSTAT_TXC | INTSTAT_RXE | INTSTAT_RQE | INTSTAT_RCC) 112 113 int epic_copy_small = 0; 114 115 /* 116 * Attach an EPIC interface to the system. 117 */ 118 void 119 epic_attach(sc) 120 struct epic_softc *sc; 121 { 122 bus_space_tag_t st = sc->sc_st; 123 bus_space_handle_t sh = sc->sc_sh; 124 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 125 int i, rseg, error; 126 bus_dma_segment_t seg; 127 u_int8_t enaddr[ETHER_ADDR_LEN], devname[12 + 1]; 128 u_int16_t myea[ETHER_ADDR_LEN / 2], mydevname[6]; 129 130 callout_init(&sc->sc_mii_callout); 131 132 /* 133 * Allocate the control data structures, and create and load the 134 * DMA map for it. 135 */ 136 if ((error = bus_dmamem_alloc(sc->sc_dmat, 137 sizeof(struct epic_control_data), NBPG, 0, &seg, 1, &rseg, 138 BUS_DMA_NOWAIT)) != 0) { 139 printf("%s: unable to allocate control data, error = %d\n", 140 sc->sc_dev.dv_xname, error); 141 goto fail_0; 142 } 143 144 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 145 sizeof(struct epic_control_data), (caddr_t *)&sc->sc_control_data, 146 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 147 printf("%s: unable to map control data, error = %d\n", 148 sc->sc_dev.dv_xname, error); 149 goto fail_1; 150 } 151 152 if ((error = bus_dmamap_create(sc->sc_dmat, 153 sizeof(struct epic_control_data), 1, 154 sizeof(struct epic_control_data), 0, BUS_DMA_NOWAIT, 155 &sc->sc_cddmamap)) != 0) { 156 printf("%s: unable to create control data DMA map, " 157 "error = %d\n", sc->sc_dev.dv_xname, error); 158 goto fail_2; 159 } 160 161 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 162 sc->sc_control_data, sizeof(struct epic_control_data), NULL, 163 BUS_DMA_NOWAIT)) != 0) { 164 printf("%s: unable to load control data DMA map, error = %d\n", 165 sc->sc_dev.dv_xname, error); 166 goto fail_3; 167 } 168 169 /* 170 * Create the transmit buffer DMA maps. 171 */ 172 for (i = 0; i < EPIC_NTXDESC; i++) { 173 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 174 EPIC_NFRAGS, MCLBYTES, 0, BUS_DMA_NOWAIT, 175 &EPIC_DSTX(sc, i)->ds_dmamap)) != 0) { 176 printf("%s: unable to create tx DMA map %d, " 177 "error = %d\n", sc->sc_dev.dv_xname, i, error); 178 goto fail_4; 179 } 180 } 181 182 /* 183 * Create the recieve buffer DMA maps. 184 */ 185 for (i = 0; i < EPIC_NRXDESC; i++) { 186 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 187 MCLBYTES, 0, BUS_DMA_NOWAIT, 188 &EPIC_DSRX(sc, i)->ds_dmamap)) != 0) { 189 printf("%s: unable to create rx DMA map %d, " 190 "error = %d\n", sc->sc_dev.dv_xname, i, error); 191 goto fail_5; 192 } 193 EPIC_DSRX(sc, i)->ds_mbuf = NULL; 194 } 195 196 197 /* 198 * Bring the chip out of low-power mode and reset it to a known state. 199 */ 200 bus_space_write_4(st, sh, EPIC_GENCTL, 0); 201 epic_reset(sc); 202 203 /* 204 * Read the Ethernet address from the EEPROM. 205 */ 206 epic_read_eeprom(sc, 0, (sizeof(myea) / sizeof(myea[0])), myea); 207 for (i = 0; i < sizeof(myea)/ sizeof(myea[0]); i++) { 208 enaddr[i * 2] = myea[i] & 0xff; 209 enaddr[i * 2 + 1] = myea[i] >> 8; 210 } 211 212 /* 213 * ...and the device name. 214 */ 215 epic_read_eeprom(sc, 0x2c, (sizeof(mydevname) / sizeof(mydevname[0])), 216 mydevname); 217 for (i = 0; i < sizeof(mydevname) / sizeof(mydevname[0]); i++) { 218 devname[i * 2] = mydevname[i] & 0xff; 219 devname[i * 2 + 1] = mydevname[i] >> 8; 220 } 221 222 devname[sizeof(mydevname)] = '\0'; 223 for (i = sizeof(mydevname) - 1; i >= 0; i--) { 224 if (devname[i] == ' ') 225 devname[i] = '\0'; 226 else 227 break; 228 } 229 230 printf("%s: %s, Ethernet address %s\n", sc->sc_dev.dv_xname, 231 devname, ether_sprintf(enaddr)); 232 233 /* 234 * Initialize our media structures and probe the MII. 235 */ 236 sc->sc_mii.mii_ifp = ifp; 237 sc->sc_mii.mii_readreg = epic_mii_read; 238 sc->sc_mii.mii_writereg = epic_mii_write; 239 sc->sc_mii.mii_statchg = epic_statchg; 240 ifmedia_init(&sc->sc_mii.mii_media, 0, epic_mediachange, 241 epic_mediastatus); 242 mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff, MII_PHY_ANY, 243 MII_OFFSET_ANY, 0); 244 if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) { 245 ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL); 246 ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE); 247 } else 248 ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO); 249 250 strcpy(ifp->if_xname, sc->sc_dev.dv_xname); 251 ifp->if_softc = sc; 252 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 253 ifp->if_ioctl = epic_ioctl; 254 ifp->if_start = epic_start; 255 ifp->if_watchdog = epic_watchdog; 256 ifp->if_init = epic_init; 257 ifp->if_stop = epic_stop; 258 259 /* 260 * Attach the interface. 261 */ 262 if_attach(ifp); 263 ether_ifattach(ifp, enaddr); 264 #if NBPFILTER > 0 265 bpfattach(&sc->sc_ethercom.ec_if.if_bpf, ifp, DLT_EN10MB, 266 sizeof(struct ether_header)); 267 #endif 268 269 /* 270 * Make sure the interface is shutdown during reboot. 271 */ 272 sc->sc_sdhook = shutdownhook_establish(epic_shutdown, sc); 273 if (sc->sc_sdhook == NULL) 274 printf("%s: WARNING: unable to establish shutdown hook\n", 275 sc->sc_dev.dv_xname); 276 return; 277 278 /* 279 * Free any resources we've allocated during the failed attach 280 * attempt. Do this in reverse order and fall through. 281 */ 282 fail_5: 283 for (i = 0; i < EPIC_NRXDESC; i++) { 284 if (EPIC_DSRX(sc, i)->ds_dmamap != NULL) 285 bus_dmamap_destroy(sc->sc_dmat, 286 EPIC_DSRX(sc, i)->ds_dmamap); 287 } 288 fail_4: 289 for (i = 0; i < EPIC_NTXDESC; i++) { 290 if (EPIC_DSTX(sc, i)->ds_dmamap != NULL) 291 bus_dmamap_destroy(sc->sc_dmat, 292 EPIC_DSTX(sc, i)->ds_dmamap); 293 } 294 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 295 fail_3: 296 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 297 fail_2: 298 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 299 sizeof(struct epic_control_data)); 300 fail_1: 301 bus_dmamem_free(sc->sc_dmat, &seg, rseg); 302 fail_0: 303 return; 304 } 305 306 /* 307 * Shutdown hook. Make sure the interface is stopped at reboot. 308 */ 309 void 310 epic_shutdown(arg) 311 void *arg; 312 { 313 struct epic_softc *sc = arg; 314 315 epic_stop(&sc->sc_ethercom.ec_if, 1); 316 } 317 318 /* 319 * Start packet transmission on the interface. 320 * [ifnet interface function] 321 */ 322 void 323 epic_start(ifp) 324 struct ifnet *ifp; 325 { 326 struct epic_softc *sc = ifp->if_softc; 327 struct mbuf *m0, *m; 328 struct epic_txdesc *txd; 329 struct epic_descsoft *ds; 330 struct epic_fraglist *fr; 331 bus_dmamap_t dmamap; 332 int error, firsttx, nexttx, opending, seg; 333 334 /* 335 * Remember the previous txpending and the first transmit 336 * descriptor we use. 337 */ 338 opending = sc->sc_txpending; 339 firsttx = EPIC_NEXTTX(sc->sc_txlast); 340 341 /* 342 * Loop through the send queue, setting up transmit descriptors 343 * until we drain the queue, or use up all available transmit 344 * descriptors. 345 */ 346 while (sc->sc_txpending < EPIC_NTXDESC) { 347 /* 348 * Grab a packet off the queue. 349 */ 350 IF_DEQUEUE(&ifp->if_snd, m0); 351 if (m0 == NULL) 352 break; 353 354 /* 355 * Get the last and next available transmit descriptor. 356 */ 357 nexttx = EPIC_NEXTTX(sc->sc_txlast); 358 txd = EPIC_CDTX(sc, nexttx); 359 fr = EPIC_CDFL(sc, nexttx); 360 ds = EPIC_DSTX(sc, nexttx); 361 dmamap = ds->ds_dmamap; 362 363 /* 364 * Load the DMA map. If this fails, the packet either 365 * didn't fit in the alloted number of frags, or we were 366 * short on resources. In this case, we'll copy and try 367 * again. 368 */ 369 if (bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 370 BUS_DMA_NOWAIT) != 0) { 371 MGETHDR(m, M_DONTWAIT, MT_DATA); 372 if (m == NULL) { 373 printf("%s: unable to allocate Tx mbuf\n", 374 sc->sc_dev.dv_xname); 375 IF_PREPEND(&ifp->if_snd, m0); 376 break; 377 } 378 if (m0->m_pkthdr.len > MHLEN) { 379 MCLGET(m, M_DONTWAIT); 380 if ((m->m_flags & M_EXT) == 0) { 381 printf("%s: unable to allocate Tx " 382 "cluster\n", sc->sc_dev.dv_xname); 383 m_freem(m); 384 IF_PREPEND(&ifp->if_snd, m0); 385 break; 386 } 387 } 388 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t)); 389 m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len; 390 m_freem(m0); 391 m0 = m; 392 error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, 393 m0, BUS_DMA_NOWAIT); 394 if (error) { 395 printf("%s: unable to load Tx buffer, " 396 "error = %d\n", sc->sc_dev.dv_xname, error); 397 IF_PREPEND(&ifp->if_snd, m0); 398 break; 399 } 400 } 401 402 /* Initialize the fraglist. */ 403 fr->ef_nfrags = dmamap->dm_nsegs; 404 for (seg = 0; seg < dmamap->dm_nsegs; seg++) { 405 fr->ef_frags[seg].ef_addr = 406 dmamap->dm_segs[seg].ds_addr; 407 fr->ef_frags[seg].ef_length = 408 dmamap->dm_segs[seg].ds_len; 409 } 410 411 EPIC_CDFLSYNC(sc, nexttx, BUS_DMASYNC_PREWRITE); 412 413 /* Sync the DMA map. */ 414 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize, 415 BUS_DMASYNC_PREWRITE); 416 417 /* 418 * Store a pointer to the packet so we can free it later. 419 */ 420 ds->ds_mbuf = m0; 421 422 /* 423 * Fill in the transmit descriptor. The EPIC doesn't 424 * auto-pad, so we have to do this ourselves. 425 */ 426 txd->et_control = ET_TXCTL_LASTDESC | ET_TXCTL_FRAGLIST; 427 txd->et_txlength = max(m0->m_pkthdr.len, 428 ETHER_MIN_LEN - ETHER_CRC_LEN); 429 430 /* 431 * If this is the first descriptor we're enqueueing, 432 * don't give it to the EPIC yet. That could cause 433 * a race condition. We'll do it below. 434 */ 435 if (nexttx == firsttx) 436 txd->et_txstatus = 0; 437 else 438 txd->et_txstatus = ET_TXSTAT_OWNER; 439 440 EPIC_CDTXSYNC(sc, nexttx, 441 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 442 443 /* Advance the tx pointer. */ 444 sc->sc_txpending++; 445 sc->sc_txlast = nexttx; 446 447 #if NBPFILTER > 0 448 /* 449 * Pass the packet to any BPF listeners. 450 */ 451 if (ifp->if_bpf) 452 bpf_mtap(ifp->if_bpf, m0); 453 #endif 454 } 455 456 if (sc->sc_txpending == EPIC_NTXDESC) { 457 /* No more slots left; notify upper layer. */ 458 ifp->if_flags |= IFF_OACTIVE; 459 } 460 461 if (sc->sc_txpending != opending) { 462 /* 463 * We enqueued packets. If the transmitter was idle, 464 * reset the txdirty pointer. 465 */ 466 if (opending == 0) 467 sc->sc_txdirty = firsttx; 468 469 /* 470 * Cause a transmit interrupt to happen on the 471 * last packet we enqueued. 472 */ 473 EPIC_CDTX(sc, sc->sc_txlast)->et_control |= ET_TXCTL_IAF; 474 EPIC_CDTXSYNC(sc, sc->sc_txlast, 475 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 476 477 /* 478 * The entire packet chain is set up. Give the 479 * first descriptor to the EPIC now. 480 */ 481 EPIC_CDTX(sc, firsttx)->et_txstatus = ET_TXSTAT_OWNER; 482 EPIC_CDTXSYNC(sc, firsttx, 483 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 484 485 /* Start the transmitter. */ 486 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_COMMAND, 487 COMMAND_TXQUEUED); 488 489 /* Set a watchdog timer in case the chip flakes out. */ 490 ifp->if_timer = 5; 491 } 492 } 493 494 /* 495 * Watchdog timer handler. 496 * [ifnet interface function] 497 */ 498 void 499 epic_watchdog(ifp) 500 struct ifnet *ifp; 501 { 502 struct epic_softc *sc = ifp->if_softc; 503 504 printf("%s: device timeout\n", sc->sc_dev.dv_xname); 505 ifp->if_oerrors++; 506 507 (void) epic_init(ifp); 508 } 509 510 /* 511 * Handle control requests from the operator. 512 * [ifnet interface function] 513 */ 514 int 515 epic_ioctl(ifp, cmd, data) 516 struct ifnet *ifp; 517 u_long cmd; 518 caddr_t data; 519 { 520 struct epic_softc *sc = ifp->if_softc; 521 struct ifreq *ifr = (struct ifreq *)data; 522 int s, error; 523 524 s = splnet(); 525 526 switch (cmd) { 527 case SIOCSIFMEDIA: 528 case SIOCGIFMEDIA: 529 error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii.mii_media, cmd); 530 break; 531 532 default: 533 error = ether_ioctl(ifp, cmd, data); 534 if (error == ENETRESET) { 535 /* 536 * Multicast list has changed; set the hardware filter 537 * accordingly. Update our idea of the current media; 538 * epic_set_mchash() needs to know what it is. 539 */ 540 mii_pollstat(&sc->sc_mii); 541 epic_set_mchash(sc); 542 error = 0; 543 } 544 break; 545 } 546 547 splx(s); 548 return (error); 549 } 550 551 /* 552 * Interrupt handler. 553 */ 554 int 555 epic_intr(arg) 556 void *arg; 557 { 558 struct epic_softc *sc = arg; 559 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 560 struct epic_rxdesc *rxd; 561 struct epic_txdesc *txd; 562 struct epic_descsoft *ds; 563 struct mbuf *m; 564 u_int32_t intstat; 565 int i, len, claimed = 0; 566 567 top: 568 /* 569 * Get the interrupt status from the EPIC. 570 */ 571 intstat = bus_space_read_4(sc->sc_st, sc->sc_sh, EPIC_INTSTAT); 572 if ((intstat & INTSTAT_INT_ACTV) == 0) 573 return (claimed); 574 575 claimed = 1; 576 577 /* 578 * Acknowledge the interrupt. 579 */ 580 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_INTSTAT, 581 intstat & INTMASK); 582 583 /* 584 * Check for receive interrupts. 585 */ 586 if (intstat & (INTSTAT_RCC | INTSTAT_RXE | INTSTAT_RQE)) { 587 for (i = sc->sc_rxptr;; i = EPIC_NEXTRX(i)) { 588 rxd = EPIC_CDRX(sc, i); 589 ds = EPIC_DSRX(sc, i); 590 591 EPIC_CDRXSYNC(sc, i, 592 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 593 594 if (rxd->er_rxstatus & ER_RXSTAT_OWNER) { 595 /* 596 * We have processed all of the 597 * receive buffers. 598 */ 599 break; 600 } 601 602 /* 603 * Make sure the packet arrived intact. If an error 604 * occurred, update stats and reset the descriptor. 605 * The buffer will be reused the next time the 606 * descriptor comes up in the ring. 607 */ 608 if ((rxd->er_rxstatus & ER_RXSTAT_PKTINTACT) == 0) { 609 if (rxd->er_rxstatus & ER_RXSTAT_CRCERROR) 610 printf("%s: CRC error\n", 611 sc->sc_dev.dv_xname); 612 if (rxd->er_rxstatus & ER_RXSTAT_ALIGNERROR) 613 printf("%s: alignment error\n", 614 sc->sc_dev.dv_xname); 615 ifp->if_ierrors++; 616 EPIC_INIT_RXDESC(sc, i); 617 continue; 618 } 619 620 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 0, 621 ds->ds_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 622 623 /* 624 * The EPIC includes the CRC with every packet. 625 */ 626 len = rxd->er_rxlength; 627 628 if (len < sizeof(struct ether_header)) { 629 /* 630 * Runt packet; drop it now. 631 */ 632 ifp->if_ierrors++; 633 EPIC_INIT_RXDESC(sc, i); 634 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 0, 635 ds->ds_dmamap->dm_mapsize, 636 BUS_DMASYNC_PREREAD); 637 continue; 638 } 639 640 /* 641 * If the packet is small enough to fit in a 642 * single header mbuf, allocate one and copy 643 * the data into it. This greatly reduces 644 * memory consumption when we receive lots 645 * of small packets. 646 * 647 * Otherwise, we add a new buffer to the receive 648 * chain. If this fails, we drop the packet and 649 * recycle the old buffer. 650 */ 651 if (epic_copy_small != 0 && len <= MHLEN) { 652 MGETHDR(m, M_DONTWAIT, MT_DATA); 653 if (m == NULL) 654 goto dropit; 655 memcpy(mtod(m, caddr_t), 656 mtod(ds->ds_mbuf, caddr_t), len); 657 EPIC_INIT_RXDESC(sc, i); 658 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 0, 659 ds->ds_dmamap->dm_mapsize, 660 BUS_DMASYNC_PREREAD); 661 } else { 662 m = ds->ds_mbuf; 663 if (epic_add_rxbuf(sc, i) != 0) { 664 dropit: 665 ifp->if_ierrors++; 666 EPIC_INIT_RXDESC(sc, i); 667 bus_dmamap_sync(sc->sc_dmat, 668 ds->ds_dmamap, 0, 669 ds->ds_dmamap->dm_mapsize, 670 BUS_DMASYNC_PREREAD); 671 continue; 672 } 673 } 674 675 m->m_flags |= M_HASFCS; 676 m->m_pkthdr.rcvif = ifp; 677 m->m_pkthdr.len = m->m_len = len; 678 679 #if NBPFILTER > 0 680 /* 681 * Pass this up to any BPF listeners, but only 682 * pass it up the stack if its for us. 683 */ 684 if (ifp->if_bpf) 685 bpf_mtap(ifp->if_bpf, m); 686 #endif 687 688 /* Pass it on. */ 689 (*ifp->if_input)(ifp, m); 690 ifp->if_ipackets++; 691 } 692 693 /* Update the recieve pointer. */ 694 sc->sc_rxptr = i; 695 696 /* 697 * Check for receive queue underflow. 698 */ 699 if (intstat & INTSTAT_RQE) { 700 printf("%s: receiver queue empty\n", 701 sc->sc_dev.dv_xname); 702 /* 703 * Ring is already built; just restart the 704 * receiver. 705 */ 706 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_PRCDAR, 707 EPIC_CDRXADDR(sc, sc->sc_rxptr)); 708 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_COMMAND, 709 COMMAND_RXQUEUED | COMMAND_START_RX); 710 } 711 } 712 713 /* 714 * Check for transmission complete interrupts. 715 */ 716 if (intstat & (INTSTAT_TXC | INTSTAT_TXU)) { 717 ifp->if_flags &= ~IFF_OACTIVE; 718 for (i = sc->sc_txdirty; sc->sc_txpending != 0; 719 i = EPIC_NEXTTX(i), sc->sc_txpending--) { 720 txd = EPIC_CDTX(sc, i); 721 ds = EPIC_DSTX(sc, i); 722 723 EPIC_CDTXSYNC(sc, i, 724 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 725 726 if (txd->et_txstatus & ET_TXSTAT_OWNER) 727 break; 728 729 EPIC_CDFLSYNC(sc, i, BUS_DMASYNC_POSTWRITE); 730 731 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 732 0, ds->ds_dmamap->dm_mapsize, 733 BUS_DMASYNC_POSTWRITE); 734 bus_dmamap_unload(sc->sc_dmat, ds->ds_dmamap); 735 m_freem(ds->ds_mbuf); 736 ds->ds_mbuf = NULL; 737 738 /* 739 * Check for errors and collisions. 740 */ 741 if ((txd->et_txstatus & ET_TXSTAT_PACKETTX) == 0) 742 ifp->if_oerrors++; 743 else 744 ifp->if_opackets++; 745 ifp->if_collisions += 746 TXSTAT_COLLISIONS(txd->et_txstatus); 747 if (txd->et_txstatus & ET_TXSTAT_CARSENSELOST) 748 printf("%s: lost carrier\n", 749 sc->sc_dev.dv_xname); 750 } 751 752 /* Update the dirty transmit buffer pointer. */ 753 sc->sc_txdirty = i; 754 755 /* 756 * Cancel the watchdog timer if there are no pending 757 * transmissions. 758 */ 759 if (sc->sc_txpending == 0) 760 ifp->if_timer = 0; 761 762 /* 763 * Kick the transmitter after a DMA underrun. 764 */ 765 if (intstat & INTSTAT_TXU) { 766 printf("%s: transmit underrun\n", sc->sc_dev.dv_xname); 767 bus_space_write_4(sc->sc_st, sc->sc_sh, 768 EPIC_COMMAND, COMMAND_TXUGO); 769 if (sc->sc_txpending) 770 bus_space_write_4(sc->sc_st, sc->sc_sh, 771 EPIC_COMMAND, COMMAND_TXQUEUED); 772 } 773 774 /* 775 * Try to get more packets going. 776 */ 777 epic_start(ifp); 778 } 779 780 /* 781 * Check for fatal interrupts. 782 */ 783 if (intstat & INTSTAT_FATAL_INT) { 784 if (intstat & INTSTAT_PTA) 785 printf("%s: PCI target abort error\n", 786 sc->sc_dev.dv_xname); 787 else if (intstat & INTSTAT_PMA) 788 printf("%s: PCI master abort error\n", 789 sc->sc_dev.dv_xname); 790 else if (intstat & INTSTAT_APE) 791 printf("%s: PCI address parity error\n", 792 sc->sc_dev.dv_xname); 793 else if (intstat & INTSTAT_DPE) 794 printf("%s: PCI data parity error\n", 795 sc->sc_dev.dv_xname); 796 else 797 printf("%s: unknown fatal error\n", 798 sc->sc_dev.dv_xname); 799 (void) epic_init(ifp); 800 } 801 802 /* 803 * Check for more interrupts. 804 */ 805 goto top; 806 } 807 808 /* 809 * One second timer, used to tick the MII. 810 */ 811 void 812 epic_tick(arg) 813 void *arg; 814 { 815 struct epic_softc *sc = arg; 816 int s; 817 818 s = splnet(); 819 mii_tick(&sc->sc_mii); 820 splx(s); 821 822 callout_reset(&sc->sc_mii_callout, hz, epic_tick, sc); 823 } 824 825 /* 826 * Fixup the clock source on the EPIC. 827 */ 828 void 829 epic_fixup_clock_source(sc) 830 struct epic_softc *sc; 831 { 832 int i; 833 834 /* 835 * According to SMC Application Note 7-15, the EPIC's clock 836 * source is incorrect following a reset. This manifests itself 837 * as failure to recognize when host software has written to 838 * a register on the EPIC. The appnote recommends issuing at 839 * least 16 consecutive writes to the CLOCK TEST bit to correctly 840 * configure the clock source. 841 */ 842 for (i = 0; i < 16; i++) 843 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_TEST, 844 TEST_CLOCKTEST); 845 } 846 847 /* 848 * Perform a soft reset on the EPIC. 849 */ 850 void 851 epic_reset(sc) 852 struct epic_softc *sc; 853 { 854 855 epic_fixup_clock_source(sc); 856 857 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_GENCTL, 0); 858 delay(100); 859 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_GENCTL, GENCTL_SOFTRESET); 860 delay(100); 861 862 epic_fixup_clock_source(sc); 863 } 864 865 /* 866 * Initialize the interface. Must be called at splnet(). 867 */ 868 int 869 epic_init(ifp) 870 struct ifnet *ifp; 871 { 872 struct epic_softc *sc = ifp->if_softc; 873 bus_space_tag_t st = sc->sc_st; 874 bus_space_handle_t sh = sc->sc_sh; 875 u_int8_t *enaddr = LLADDR(ifp->if_sadl); 876 struct epic_txdesc *txd; 877 struct epic_descsoft *ds; 878 u_int32_t genctl, reg0; 879 int i, error = 0; 880 881 /* 882 * Cancel any pending I/O. 883 */ 884 epic_stop(ifp, 0); 885 886 /* 887 * Reset the EPIC to a known state. 888 */ 889 epic_reset(sc); 890 891 /* 892 * Magical mystery initialization. 893 */ 894 bus_space_write_4(st, sh, EPIC_TXTEST, 0); 895 896 /* 897 * Initialize the EPIC genctl register: 898 * 899 * - 64 byte receive FIFO threshold 900 * - automatic advance to next receive frame 901 */ 902 genctl = GENCTL_RX_FIFO_THRESH0 | GENCTL_ONECOPY; 903 #if BYTE_ORDER == BIG_ENDIAN 904 genctl |= GENCTL_BIG_ENDIAN; 905 #endif 906 bus_space_write_4(st, sh, EPIC_GENCTL, genctl); 907 908 /* 909 * Reset the MII bus and PHY. 910 */ 911 reg0 = bus_space_read_4(st, sh, EPIC_NVCTL); 912 bus_space_write_4(st, sh, EPIC_NVCTL, reg0 | NVCTL_GPIO1 | NVCTL_GPOE1); 913 bus_space_write_4(st, sh, EPIC_MIICFG, MIICFG_ENASER); 914 bus_space_write_4(st, sh, EPIC_GENCTL, genctl | GENCTL_RESET_PHY); 915 delay(100); 916 bus_space_write_4(st, sh, EPIC_GENCTL, genctl); 917 delay(100); 918 bus_space_write_4(st, sh, EPIC_NVCTL, reg0); 919 920 /* 921 * Initialize Ethernet address. 922 */ 923 reg0 = enaddr[1] << 8 | enaddr[0]; 924 bus_space_write_4(st, sh, EPIC_LAN0, reg0); 925 reg0 = enaddr[3] << 8 | enaddr[2]; 926 bus_space_write_4(st, sh, EPIC_LAN1, reg0); 927 reg0 = enaddr[5] << 8 | enaddr[4]; 928 bus_space_write_4(st, sh, EPIC_LAN2, reg0); 929 930 /* 931 * Initialize receive control. Remember the external buffer 932 * size setting. 933 */ 934 reg0 = bus_space_read_4(st, sh, EPIC_RXCON) & 935 (RXCON_EXTBUFSIZESEL1 | RXCON_EXTBUFSIZESEL0); 936 reg0 |= (RXCON_RXMULTICAST | RXCON_RXBROADCAST); 937 if (ifp->if_flags & IFF_PROMISC) 938 reg0 |= RXCON_PROMISCMODE; 939 bus_space_write_4(st, sh, EPIC_RXCON, reg0); 940 941 /* Set the current media. */ 942 mii_mediachg(&sc->sc_mii); 943 944 /* Set up the multicast hash table. */ 945 epic_set_mchash(sc); 946 947 /* 948 * Initialize the transmit descriptor ring. txlast is initialized 949 * to the end of the list so that it will wrap around to the first 950 * descriptor when the first packet is transmitted. 951 */ 952 for (i = 0; i < EPIC_NTXDESC; i++) { 953 txd = EPIC_CDTX(sc, i); 954 memset(txd, 0, sizeof(struct epic_txdesc)); 955 txd->et_bufaddr = EPIC_CDFLADDR(sc, i); 956 txd->et_nextdesc = EPIC_CDTXADDR(sc, EPIC_NEXTTX(i)); 957 EPIC_CDTXSYNC(sc, i, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 958 } 959 sc->sc_txpending = 0; 960 sc->sc_txdirty = 0; 961 sc->sc_txlast = EPIC_NTXDESC - 1; 962 963 /* 964 * Initialize the receive descriptor ring. 965 */ 966 for (i = 0; i < EPIC_NRXDESC; i++) { 967 ds = EPIC_DSRX(sc, i); 968 if (ds->ds_mbuf == NULL) { 969 if ((error = epic_add_rxbuf(sc, i)) != 0) { 970 printf("%s: unable to allocate or map rx " 971 "buffer %d error = %d\n", 972 sc->sc_dev.dv_xname, i, error); 973 /* 974 * XXX Should attempt to run with fewer receive 975 * XXX buffers instead of just failing. 976 */ 977 epic_rxdrain(sc); 978 goto out; 979 } 980 } 981 } 982 sc->sc_rxptr = 0; 983 984 /* 985 * Initialize the interrupt mask and enable interrupts. 986 */ 987 bus_space_write_4(st, sh, EPIC_INTMASK, INTMASK); 988 bus_space_write_4(st, sh, EPIC_GENCTL, genctl | GENCTL_INTENA); 989 990 /* 991 * Give the transmit and receive rings to the EPIC. 992 */ 993 bus_space_write_4(st, sh, EPIC_PTCDAR, 994 EPIC_CDTXADDR(sc, EPIC_NEXTTX(sc->sc_txlast))); 995 bus_space_write_4(st, sh, EPIC_PRCDAR, 996 EPIC_CDRXADDR(sc, sc->sc_rxptr)); 997 998 /* 999 * Set the EPIC in motion. 1000 */ 1001 bus_space_write_4(st, sh, EPIC_COMMAND, 1002 COMMAND_RXQUEUED | COMMAND_START_RX); 1003 1004 /* 1005 * ...all done! 1006 */ 1007 ifp->if_flags |= IFF_RUNNING; 1008 ifp->if_flags &= ~IFF_OACTIVE; 1009 1010 /* 1011 * Start the one second clock. 1012 */ 1013 callout_reset(&sc->sc_mii_callout, hz, epic_tick, sc); 1014 1015 /* 1016 * Attempt to start output on the interface. 1017 */ 1018 epic_start(ifp); 1019 1020 out: 1021 if (error) 1022 printf("%s: interface not running\n", sc->sc_dev.dv_xname); 1023 return (error); 1024 } 1025 1026 /* 1027 * Drain the receive queue. 1028 */ 1029 void 1030 epic_rxdrain(sc) 1031 struct epic_softc *sc; 1032 { 1033 struct epic_descsoft *ds; 1034 int i; 1035 1036 for (i = 0; i < EPIC_NRXDESC; i++) { 1037 ds = EPIC_DSRX(sc, i); 1038 if (ds->ds_mbuf != NULL) { 1039 bus_dmamap_unload(sc->sc_dmat, ds->ds_dmamap); 1040 m_freem(ds->ds_mbuf); 1041 ds->ds_mbuf = NULL; 1042 } 1043 } 1044 } 1045 1046 /* 1047 * Stop transmission on the interface. 1048 */ 1049 void 1050 epic_stop(ifp, disable) 1051 struct ifnet *ifp; 1052 int disable; 1053 { 1054 struct epic_softc *sc = ifp->if_softc; 1055 bus_space_tag_t st = sc->sc_st; 1056 bus_space_handle_t sh = sc->sc_sh; 1057 struct epic_descsoft *ds; 1058 u_int32_t reg; 1059 int i; 1060 1061 /* 1062 * Stop the one second clock. 1063 */ 1064 callout_stop(&sc->sc_mii_callout); 1065 1066 /* Down the MII. */ 1067 mii_down(&sc->sc_mii); 1068 1069 /* Paranoia... */ 1070 epic_fixup_clock_source(sc); 1071 1072 /* 1073 * Disable interrupts. 1074 */ 1075 reg = bus_space_read_4(st, sh, EPIC_GENCTL); 1076 bus_space_write_4(st, sh, EPIC_GENCTL, reg & ~GENCTL_INTENA); 1077 bus_space_write_4(st, sh, EPIC_INTMASK, 0); 1078 1079 /* 1080 * Stop the DMA engine and take the receiver off-line. 1081 */ 1082 bus_space_write_4(st, sh, EPIC_COMMAND, COMMAND_STOP_RDMA | 1083 COMMAND_STOP_TDMA | COMMAND_STOP_RX); 1084 1085 /* 1086 * Release any queued transmit buffers. 1087 */ 1088 for (i = 0; i < EPIC_NTXDESC; i++) { 1089 ds = EPIC_DSTX(sc, i); 1090 if (ds->ds_mbuf != NULL) { 1091 bus_dmamap_unload(sc->sc_dmat, ds->ds_dmamap); 1092 m_freem(ds->ds_mbuf); 1093 ds->ds_mbuf = NULL; 1094 } 1095 } 1096 1097 if (disable) 1098 epic_rxdrain(sc); 1099 1100 /* 1101 * Mark the interface down and cancel the watchdog timer. 1102 */ 1103 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1104 ifp->if_timer = 0; 1105 } 1106 1107 /* 1108 * Read the EPIC Serial EEPROM. 1109 */ 1110 void 1111 epic_read_eeprom(sc, word, wordcnt, data) 1112 struct epic_softc *sc; 1113 int word, wordcnt; 1114 u_int16_t *data; 1115 { 1116 bus_space_tag_t st = sc->sc_st; 1117 bus_space_handle_t sh = sc->sc_sh; 1118 u_int16_t reg; 1119 int i, x; 1120 1121 #define EEPROM_WAIT_READY(st, sh) \ 1122 while ((bus_space_read_4((st), (sh), EPIC_EECTL) & EECTL_EERDY) == 0) \ 1123 /* nothing */ 1124 1125 /* 1126 * Enable the EEPROM. 1127 */ 1128 bus_space_write_4(st, sh, EPIC_EECTL, EECTL_ENABLE); 1129 EEPROM_WAIT_READY(st, sh); 1130 1131 for (i = 0; i < wordcnt; i++) { 1132 /* Send CHIP SELECT for one clock tick. */ 1133 bus_space_write_4(st, sh, EPIC_EECTL, EECTL_ENABLE|EECTL_EECS); 1134 EEPROM_WAIT_READY(st, sh); 1135 1136 /* Shift in the READ opcode. */ 1137 for (x = 3; x > 0; x--) { 1138 reg = EECTL_ENABLE|EECTL_EECS; 1139 if (EPIC_EEPROM_OPC_READ & (1 << (x - 1))) 1140 reg |= EECTL_EEDI; 1141 bus_space_write_4(st, sh, EPIC_EECTL, reg); 1142 EEPROM_WAIT_READY(st, sh); 1143 bus_space_write_4(st, sh, EPIC_EECTL, reg|EECTL_EESK); 1144 EEPROM_WAIT_READY(st, sh); 1145 bus_space_write_4(st, sh, EPIC_EECTL, reg); 1146 EEPROM_WAIT_READY(st, sh); 1147 } 1148 1149 /* Shift in address. */ 1150 for (x = 6; x > 0; x--) { 1151 reg = EECTL_ENABLE|EECTL_EECS; 1152 if ((word + i) & (1 << (x - 1))) 1153 reg |= EECTL_EEDI; 1154 bus_space_write_4(st, sh, EPIC_EECTL, reg); 1155 EEPROM_WAIT_READY(st, sh); 1156 bus_space_write_4(st, sh, EPIC_EECTL, reg|EECTL_EESK); 1157 EEPROM_WAIT_READY(st, sh); 1158 bus_space_write_4(st, sh, EPIC_EECTL, reg); 1159 EEPROM_WAIT_READY(st, sh); 1160 } 1161 1162 /* Shift out data. */ 1163 reg = EECTL_ENABLE|EECTL_EECS; 1164 data[i] = 0; 1165 for (x = 16; x > 0; x--) { 1166 bus_space_write_4(st, sh, EPIC_EECTL, reg|EECTL_EESK); 1167 EEPROM_WAIT_READY(st, sh); 1168 if (bus_space_read_4(st, sh, EPIC_EECTL) & EECTL_EEDO) 1169 data[i] |= (1 << (x - 1)); 1170 bus_space_write_4(st, sh, EPIC_EECTL, reg); 1171 EEPROM_WAIT_READY(st, sh); 1172 } 1173 1174 /* Clear CHIP SELECT. */ 1175 bus_space_write_4(st, sh, EPIC_EECTL, EECTL_ENABLE); 1176 EEPROM_WAIT_READY(st, sh); 1177 } 1178 1179 /* 1180 * Disable the EEPROM. 1181 */ 1182 bus_space_write_4(st, sh, EPIC_EECTL, 0); 1183 1184 #undef EEPROM_WAIT_READY 1185 } 1186 1187 /* 1188 * Add a receive buffer to the indicated descriptor. 1189 */ 1190 int 1191 epic_add_rxbuf(sc, idx) 1192 struct epic_softc *sc; 1193 int idx; 1194 { 1195 struct epic_descsoft *ds = EPIC_DSRX(sc, idx); 1196 struct mbuf *m; 1197 int error; 1198 1199 MGETHDR(m, M_DONTWAIT, MT_DATA); 1200 if (m == NULL) 1201 return (ENOBUFS); 1202 1203 MCLGET(m, M_DONTWAIT); 1204 if ((m->m_flags & M_EXT) == 0) { 1205 m_freem(m); 1206 return (ENOBUFS); 1207 } 1208 1209 if (ds->ds_mbuf != NULL) 1210 bus_dmamap_unload(sc->sc_dmat, ds->ds_dmamap); 1211 1212 ds->ds_mbuf = m; 1213 1214 error = bus_dmamap_load(sc->sc_dmat, ds->ds_dmamap, 1215 m->m_ext.ext_buf, m->m_ext.ext_size, NULL, BUS_DMA_NOWAIT); 1216 if (error) { 1217 printf("%s: can't load rx DMA map %d, error = %d\n", 1218 sc->sc_dev.dv_xname, idx, error); 1219 panic("epic_add_rxbuf"); /* XXX */ 1220 } 1221 1222 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 0, 1223 ds->ds_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 1224 1225 EPIC_INIT_RXDESC(sc, idx); 1226 1227 return (0); 1228 } 1229 1230 /* 1231 * Set the EPIC multicast hash table. 1232 * 1233 * NOTE: We rely on a recently-updated mii_media_active here! 1234 */ 1235 void 1236 epic_set_mchash(sc) 1237 struct epic_softc *sc; 1238 { 1239 struct ethercom *ec = &sc->sc_ethercom; 1240 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1241 struct ether_multi *enm; 1242 struct ether_multistep step; 1243 u_int32_t hash, mchash[4]; 1244 1245 /* 1246 * Set up the multicast address filter by passing all multicast 1247 * addresses through a CRC generator, and then using the low-order 1248 * 6 bits as an index into the 64 bit multicast hash table (only 1249 * the lower 16 bits of each 32 bit multicast hash register are 1250 * valid). The high order bits select the register, while the 1251 * rest of the bits select the bit within the register. 1252 */ 1253 1254 if (ifp->if_flags & IFF_PROMISC) 1255 goto allmulti; 1256 1257 if (IFM_SUBTYPE(sc->sc_mii.mii_media_active) == IFM_10_T) { 1258 /* XXX hardware bug in 10Mbps mode. */ 1259 goto allmulti; 1260 } 1261 1262 mchash[0] = mchash[1] = mchash[2] = mchash[3] = 0; 1263 1264 ETHER_FIRST_MULTI(step, ec, enm); 1265 while (enm != NULL) { 1266 if (bcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) { 1267 /* 1268 * We must listen to a range of multicast addresses. 1269 * For now, just accept all multicasts, rather than 1270 * trying to set only those filter bits needed to match 1271 * the range. (At this time, the only use of address 1272 * ranges is for IP multicast routing, for which the 1273 * range is big enough to require all bits set.) 1274 */ 1275 goto allmulti; 1276 } 1277 1278 hash = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN) & 0x3f; 1279 1280 /* Set the corresponding bit in the hash table. */ 1281 mchash[hash >> 4] |= 1 << (hash & 0xf); 1282 1283 ETHER_NEXT_MULTI(step, enm); 1284 } 1285 1286 ifp->if_flags &= ~IFF_ALLMULTI; 1287 goto sethash; 1288 1289 allmulti: 1290 ifp->if_flags |= IFF_ALLMULTI; 1291 mchash[0] = mchash[1] = mchash[2] = mchash[3] = 0xffff; 1292 1293 sethash: 1294 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_MC0, mchash[0]); 1295 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_MC1, mchash[1]); 1296 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_MC2, mchash[2]); 1297 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_MC3, mchash[3]); 1298 } 1299 1300 /* 1301 * Wait for the MII to become ready. 1302 */ 1303 int 1304 epic_mii_wait(sc, rw) 1305 struct epic_softc *sc; 1306 u_int32_t rw; 1307 { 1308 int i; 1309 1310 for (i = 0; i < 50; i++) { 1311 if ((bus_space_read_4(sc->sc_st, sc->sc_sh, EPIC_MMCTL) & rw) 1312 == 0) 1313 break; 1314 delay(2); 1315 } 1316 if (i == 50) { 1317 printf("%s: MII timed out\n", sc->sc_dev.dv_xname); 1318 return (1); 1319 } 1320 1321 return (0); 1322 } 1323 1324 /* 1325 * Read from the MII. 1326 */ 1327 int 1328 epic_mii_read(self, phy, reg) 1329 struct device *self; 1330 int phy, reg; 1331 { 1332 struct epic_softc *sc = (struct epic_softc *)self; 1333 1334 if (epic_mii_wait(sc, MMCTL_WRITE)) 1335 return (0); 1336 1337 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_MMCTL, 1338 MMCTL_ARG(phy, reg, MMCTL_READ)); 1339 1340 if (epic_mii_wait(sc, MMCTL_READ)) 1341 return (0); 1342 1343 return (bus_space_read_4(sc->sc_st, sc->sc_sh, EPIC_MMDATA) & 1344 MMDATA_MASK); 1345 } 1346 1347 /* 1348 * Write to the MII. 1349 */ 1350 void 1351 epic_mii_write(self, phy, reg, val) 1352 struct device *self; 1353 int phy, reg, val; 1354 { 1355 struct epic_softc *sc = (struct epic_softc *)self; 1356 1357 if (epic_mii_wait(sc, MMCTL_WRITE)) 1358 return; 1359 1360 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_MMDATA, val); 1361 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_MMCTL, 1362 MMCTL_ARG(phy, reg, MMCTL_WRITE)); 1363 } 1364 1365 /* 1366 * Callback from PHY when media changes. 1367 */ 1368 void 1369 epic_statchg(self) 1370 struct device *self; 1371 { 1372 struct epic_softc *sc = (struct epic_softc *)self; 1373 u_int32_t txcon; 1374 1375 /* 1376 * Update loopback bits in TXCON to reflect duplex mode. 1377 */ 1378 txcon = bus_space_read_4(sc->sc_st, sc->sc_sh, EPIC_TXCON); 1379 if (sc->sc_mii.mii_media_active & IFM_FDX) 1380 txcon |= (TXCON_LOOPBACK_D1|TXCON_LOOPBACK_D2); 1381 else 1382 txcon &= ~(TXCON_LOOPBACK_D1|TXCON_LOOPBACK_D2); 1383 bus_space_write_4(sc->sc_st, sc->sc_sh, EPIC_TXCON, txcon); 1384 1385 /* 1386 * There is a multicast filter bug in 10Mbps mode. Kick the 1387 * multicast filter in case the speed changed. 1388 */ 1389 epic_set_mchash(sc); 1390 } 1391 1392 /* 1393 * Callback from ifmedia to request current media status. 1394 */ 1395 void 1396 epic_mediastatus(ifp, ifmr) 1397 struct ifnet *ifp; 1398 struct ifmediareq *ifmr; 1399 { 1400 struct epic_softc *sc = ifp->if_softc; 1401 1402 mii_pollstat(&sc->sc_mii); 1403 ifmr->ifm_status = sc->sc_mii.mii_media_status; 1404 ifmr->ifm_active = sc->sc_mii.mii_media_active; 1405 } 1406 1407 /* 1408 * Callback from ifmedia to request new media setting. 1409 */ 1410 int 1411 epic_mediachange(ifp) 1412 struct ifnet *ifp; 1413 { 1414 struct epic_softc *sc = ifp->if_softc; 1415 1416 if (ifp->if_flags & IFF_UP) 1417 mii_mediachg(&sc->sc_mii); 1418 return (0); 1419 } 1420
Indexes created Sat Sep 27 22:09:54 GMT 2025