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sys/dev/ic/dp83932.c
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1 /* $NetBSD: dp83932.c,v 1.35 2010/11/13 13:52:00 uebayasi 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 Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Device driver for the National Semiconductor DP83932 34 * Systems-Oriented Network Interface Controller (SONIC). 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: dp83932.c,v 1.35 2010/11/13 13:52:00 uebayasi Exp $"); 39 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/mbuf.h> 44 #include <sys/malloc.h> 45 #include <sys/kernel.h> 46 #include <sys/socket.h> 47 #include <sys/ioctl.h> 48 #include <sys/errno.h> 49 #include <sys/device.h> 50 51 #include <net/if.h> 52 #include <net/if_dl.h> 53 #include <net/if_ether.h> 54 55 #include <net/bpf.h> 56 57 #include <sys/bus.h> 58 #include <sys/intr.h> 59 60 #include <dev/ic/dp83932reg.h> 61 #include <dev/ic/dp83932var.h> 62 63 static void sonic_start(struct ifnet *); 64 static void sonic_watchdog(struct ifnet *); 65 static int sonic_ioctl(struct ifnet *, u_long, void *); 66 static int sonic_init(struct ifnet *); 67 static void sonic_stop(struct ifnet *, int); 68 69 static bool sonic_shutdown(device_t, int); 70 71 static void sonic_reset(struct sonic_softc *); 72 static void sonic_rxdrain(struct sonic_softc *); 73 static int sonic_add_rxbuf(struct sonic_softc *, int); 74 static void sonic_set_filter(struct sonic_softc *); 75 76 static uint16_t sonic_txintr(struct sonic_softc *); 77 static void sonic_rxintr(struct sonic_softc *); 78 79 int sonic_copy_small = 0; 80 81 #define ETHER_PAD_LEN (ETHER_MIN_LEN - ETHER_CRC_LEN) 82 83 /* 84 * sonic_attach: 85 * 86 * Attach a SONIC interface to the system. 87 */ 88 void 89 sonic_attach(struct sonic_softc *sc, const uint8_t *enaddr) 90 { 91 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 92 int i, rseg, error; 93 bus_dma_segment_t seg; 94 size_t cdatasize; 95 uint8_t *nullbuf; 96 97 /* 98 * Allocate the control data structures, and create and load the 99 * DMA map for it. 100 */ 101 if (sc->sc_32bit) 102 cdatasize = sizeof(struct sonic_control_data32); 103 else 104 cdatasize = sizeof(struct sonic_control_data16); 105 106 if ((error = bus_dmamem_alloc(sc->sc_dmat, cdatasize + ETHER_PAD_LEN, 107 PAGE_SIZE, (64 * 1024), &seg, 1, &rseg, 108 BUS_DMA_NOWAIT)) != 0) { 109 aprint_error_dev(sc->sc_dev, 110 "unable to allocate control data, error = %d\n", error); 111 goto fail_0; 112 } 113 114 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 115 cdatasize + ETHER_PAD_LEN, (void **) &sc->sc_cdata16, 116 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 117 aprint_error_dev(sc->sc_dev, 118 "unable to map control data, error = %d\n", error); 119 goto fail_1; 120 } 121 nullbuf = (uint8_t *)sc->sc_cdata16 + cdatasize; 122 memset(nullbuf, 0, ETHER_PAD_LEN); 123 124 if ((error = bus_dmamap_create(sc->sc_dmat, 125 cdatasize, 1, cdatasize, 0, BUS_DMA_NOWAIT, 126 &sc->sc_cddmamap)) != 0) { 127 aprint_error_dev(sc->sc_dev, 128 "unable to create control data DMA map, error = %d\n", 129 error); 130 goto fail_2; 131 } 132 133 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 134 sc->sc_cdata16, cdatasize, NULL, BUS_DMA_NOWAIT)) != 0) { 135 aprint_error_dev(sc->sc_dev, 136 "unable to load control data DMA map, error = %d\n", error); 137 goto fail_3; 138 } 139 140 /* 141 * Create the transmit buffer DMA maps. 142 */ 143 for (i = 0; i < SONIC_NTXDESC; i++) { 144 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 145 SONIC_NTXFRAGS, MCLBYTES, 0, BUS_DMA_NOWAIT, 146 &sc->sc_txsoft[i].ds_dmamap)) != 0) { 147 aprint_error_dev(sc->sc_dev, 148 "unable to create tx DMA map %d, error = %d\n", 149 i, error); 150 goto fail_4; 151 } 152 } 153 154 /* 155 * Create the receive buffer DMA maps. 156 */ 157 for (i = 0; i < SONIC_NRXDESC; i++) { 158 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 159 MCLBYTES, 0, BUS_DMA_NOWAIT, 160 &sc->sc_rxsoft[i].ds_dmamap)) != 0) { 161 aprint_error_dev(sc->sc_dev, 162 "unable to create rx DMA map %d, error = %d\n", 163 i, error); 164 goto fail_5; 165 } 166 sc->sc_rxsoft[i].ds_mbuf = NULL; 167 } 168 169 /* 170 * create and map the pad buffer 171 */ 172 if ((error = bus_dmamap_create(sc->sc_dmat, ETHER_PAD_LEN, 1, 173 ETHER_PAD_LEN, 0, BUS_DMA_NOWAIT, &sc->sc_nulldmamap)) != 0) { 174 aprint_error_dev(sc->sc_dev, 175 "unable to create pad buffer DMA map, error = %d\n", error); 176 goto fail_5; 177 } 178 179 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_nulldmamap, 180 nullbuf, ETHER_PAD_LEN, NULL, BUS_DMA_NOWAIT)) != 0) { 181 aprint_error_dev(sc->sc_dev, 182 "unable to load pad buffer DMA map, error = %d\n", error); 183 goto fail_6; 184 } 185 bus_dmamap_sync(sc->sc_dmat, sc->sc_nulldmamap, 0, ETHER_PAD_LEN, 186 BUS_DMASYNC_PREWRITE); 187 188 /* 189 * Reset the chip to a known state. 190 */ 191 sonic_reset(sc); 192 193 aprint_normal_dev(sc->sc_dev, "Ethernet address %s\n", 194 ether_sprintf(enaddr)); 195 196 strlcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ); 197 ifp->if_softc = sc; 198 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 199 ifp->if_ioctl = sonic_ioctl; 200 ifp->if_start = sonic_start; 201 ifp->if_watchdog = sonic_watchdog; 202 ifp->if_init = sonic_init; 203 ifp->if_stop = sonic_stop; 204 IFQ_SET_READY(&ifp->if_snd); 205 206 /* 207 * We can support 802.1Q VLAN-sized frames. 208 */ 209 sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; 210 211 /* 212 * Attach the interface. 213 */ 214 if_attach(ifp); 215 ether_ifattach(ifp, enaddr); 216 217 /* 218 * Make sure the interface is shutdown during reboot. 219 */ 220 if (pmf_device_register1(sc->sc_dev, NULL, NULL, sonic_shutdown)) 221 pmf_class_network_register(sc->sc_dev, ifp); 222 else 223 aprint_error_dev(sc->sc_dev, 224 "couldn't establish power handler\n"); 225 226 return; 227 228 /* 229 * Free any resources we've allocated during the failed attach 230 * attempt. Do this in reverse order and fall through. 231 */ 232 fail_6: 233 bus_dmamap_destroy(sc->sc_dmat, sc->sc_nulldmamap); 234 fail_5: 235 for (i = 0; i < SONIC_NRXDESC; i++) { 236 if (sc->sc_rxsoft[i].ds_dmamap != NULL) 237 bus_dmamap_destroy(sc->sc_dmat, 238 sc->sc_rxsoft[i].ds_dmamap); 239 } 240 fail_4: 241 for (i = 0; i < SONIC_NTXDESC; i++) { 242 if (sc->sc_txsoft[i].ds_dmamap != NULL) 243 bus_dmamap_destroy(sc->sc_dmat, 244 sc->sc_txsoft[i].ds_dmamap); 245 } 246 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 247 fail_3: 248 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 249 fail_2: 250 bus_dmamem_unmap(sc->sc_dmat, (void *)sc->sc_cdata16, cdatasize); 251 fail_1: 252 bus_dmamem_free(sc->sc_dmat, &seg, rseg); 253 fail_0: 254 return; 255 } 256 257 /* 258 * sonic_shutdown: 259 * 260 * Make sure the interface is stopped at reboot. 261 */ 262 bool 263 sonic_shutdown(device_t self, int howto) 264 { 265 struct sonic_softc *sc = device_private(self); 266 267 sonic_stop(&sc->sc_ethercom.ec_if, 1); 268 269 return true; 270 } 271 272 /* 273 * sonic_start: [ifnet interface function] 274 * 275 * Start packet transmission on the interface. 276 */ 277 void 278 sonic_start(struct ifnet *ifp) 279 { 280 struct sonic_softc *sc = ifp->if_softc; 281 struct mbuf *m0, *m; 282 struct sonic_tda16 *tda16; 283 struct sonic_tda32 *tda32; 284 struct sonic_descsoft *ds; 285 bus_dmamap_t dmamap; 286 int error, olasttx, nexttx, opending, totlen, olseg; 287 int seg = 0; /* XXX: gcc */ 288 289 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 290 return; 291 292 /* 293 * Remember the previous txpending and the current "last txdesc 294 * used" index. 295 */ 296 opending = sc->sc_txpending; 297 olasttx = sc->sc_txlast; 298 299 /* 300 * Loop through the send queue, setting up transmit descriptors 301 * until we drain the queue, or use up all available transmit 302 * descriptors. Leave one at the end for sanity's sake. 303 */ 304 while (sc->sc_txpending < (SONIC_NTXDESC - 1)) { 305 /* 306 * Grab a packet off the queue. 307 */ 308 IFQ_POLL(&ifp->if_snd, m0); 309 if (m0 == NULL) 310 break; 311 m = NULL; 312 313 /* 314 * Get the next available transmit descriptor. 315 */ 316 nexttx = SONIC_NEXTTX(sc->sc_txlast); 317 ds = &sc->sc_txsoft[nexttx]; 318 dmamap = ds->ds_dmamap; 319 320 /* 321 * Load the DMA map. If this fails, the packet either 322 * didn't fit in the allotted number of frags, or we were 323 * short on resources. In this case, we'll copy and try 324 * again. 325 */ 326 if ((error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 327 BUS_DMA_WRITE|BUS_DMA_NOWAIT)) != 0 || 328 (m0->m_pkthdr.len < ETHER_PAD_LEN && 329 dmamap->dm_nsegs == SONIC_NTXFRAGS)) { 330 if (error == 0) 331 bus_dmamap_unload(sc->sc_dmat, dmamap); 332 MGETHDR(m, M_DONTWAIT, MT_DATA); 333 if (m == NULL) { 334 printf("%s: unable to allocate Tx mbuf\n", 335 device_xname(sc->sc_dev)); 336 break; 337 } 338 if (m0->m_pkthdr.len > MHLEN) { 339 MCLGET(m, M_DONTWAIT); 340 if ((m->m_flags & M_EXT) == 0) { 341 printf("%s: unable to allocate Tx " 342 "cluster\n", 343 device_xname(sc->sc_dev)); 344 m_freem(m); 345 break; 346 } 347 } 348 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, void *)); 349 m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len; 350 error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, 351 m, BUS_DMA_WRITE|BUS_DMA_NOWAIT); 352 if (error) { 353 printf("%s: unable to load Tx buffer, " 354 "error = %d\n", device_xname(sc->sc_dev), 355 error); 356 m_freem(m); 357 break; 358 } 359 } 360 IFQ_DEQUEUE(&ifp->if_snd, m0); 361 if (m != NULL) { 362 m_freem(m0); 363 m0 = m; 364 } 365 366 /* 367 * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET. 368 */ 369 370 /* Sync the DMA map. */ 371 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize, 372 BUS_DMASYNC_PREWRITE); 373 374 /* 375 * Store a pointer to the packet so we can free it later. 376 */ 377 ds->ds_mbuf = m0; 378 379 /* 380 * Initialize the transmit descriptor. 381 */ 382 totlen = 0; 383 if (sc->sc_32bit) { 384 tda32 = &sc->sc_tda32[nexttx]; 385 for (seg = 0; seg < dmamap->dm_nsegs; seg++) { 386 tda32->tda_frags[seg].frag_ptr1 = 387 htosonic32(sc, 388 (dmamap->dm_segs[seg].ds_addr >> 16) & 389 0xffff); 390 tda32->tda_frags[seg].frag_ptr0 = 391 htosonic32(sc, 392 dmamap->dm_segs[seg].ds_addr & 0xffff); 393 tda32->tda_frags[seg].frag_size = 394 htosonic32(sc, dmamap->dm_segs[seg].ds_len); 395 totlen += dmamap->dm_segs[seg].ds_len; 396 } 397 if (totlen < ETHER_PAD_LEN) { 398 tda32->tda_frags[seg].frag_ptr1 = 399 htosonic32(sc, 400 (sc->sc_nulldma >> 16) & 0xffff); 401 tda32->tda_frags[seg].frag_ptr0 = 402 htosonic32(sc, sc->sc_nulldma & 0xffff); 403 tda32->tda_frags[seg].frag_size = 404 htosonic32(sc, ETHER_PAD_LEN - totlen); 405 totlen = ETHER_PAD_LEN; 406 seg++; 407 } 408 409 tda32->tda_status = 0; 410 tda32->tda_pktconfig = 0; 411 tda32->tda_pktsize = htosonic32(sc, totlen); 412 tda32->tda_fragcnt = htosonic32(sc, seg); 413 414 /* Link it up. */ 415 tda32->tda_frags[seg].frag_ptr0 = 416 htosonic32(sc, SONIC_CDTXADDR32(sc, 417 SONIC_NEXTTX(nexttx)) & 0xffff); 418 419 /* Sync the Tx descriptor. */ 420 SONIC_CDTXSYNC32(sc, nexttx, 421 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 422 } else { 423 tda16 = &sc->sc_tda16[nexttx]; 424 for (seg = 0; seg < dmamap->dm_nsegs; seg++) { 425 tda16->tda_frags[seg].frag_ptr1 = 426 htosonic16(sc, 427 (dmamap->dm_segs[seg].ds_addr >> 16) & 428 0xffff); 429 tda16->tda_frags[seg].frag_ptr0 = 430 htosonic16(sc, 431 dmamap->dm_segs[seg].ds_addr & 0xffff); 432 tda16->tda_frags[seg].frag_size = 433 htosonic16(sc, dmamap->dm_segs[seg].ds_len); 434 totlen += dmamap->dm_segs[seg].ds_len; 435 } 436 if (totlen < ETHER_PAD_LEN) { 437 tda16->tda_frags[seg].frag_ptr1 = 438 htosonic16(sc, 439 (sc->sc_nulldma >> 16) & 0xffff); 440 tda16->tda_frags[seg].frag_ptr0 = 441 htosonic16(sc, sc->sc_nulldma & 0xffff); 442 tda16->tda_frags[seg].frag_size = 443 htosonic16(sc, ETHER_PAD_LEN - totlen); 444 totlen = ETHER_PAD_LEN; 445 seg++; 446 } 447 448 tda16->tda_status = 0; 449 tda16->tda_pktconfig = 0; 450 tda16->tda_pktsize = htosonic16(sc, totlen); 451 tda16->tda_fragcnt = htosonic16(sc, seg); 452 453 /* Link it up. */ 454 tda16->tda_frags[seg].frag_ptr0 = 455 htosonic16(sc, SONIC_CDTXADDR16(sc, 456 SONIC_NEXTTX(nexttx)) & 0xffff); 457 458 /* Sync the Tx descriptor. */ 459 SONIC_CDTXSYNC16(sc, nexttx, 460 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 461 } 462 463 /* Advance the Tx pointer. */ 464 sc->sc_txpending++; 465 sc->sc_txlast = nexttx; 466 467 /* 468 * Pass the packet to any BPF listeners. 469 */ 470 bpf_mtap(ifp, m0); 471 } 472 473 if (sc->sc_txpending == (SONIC_NTXDESC - 1)) { 474 /* No more slots left; notify upper layer. */ 475 ifp->if_flags |= IFF_OACTIVE; 476 } 477 478 if (sc->sc_txpending != opending) { 479 /* 480 * We enqueued packets. If the transmitter was idle, 481 * reset the txdirty pointer. 482 */ 483 if (opending == 0) 484 sc->sc_txdirty = SONIC_NEXTTX(olasttx); 485 486 /* 487 * Stop the SONIC on the last packet we've set up, 488 * and clear end-of-list on the descriptor previous 489 * to our new chain. 490 * 491 * NOTE: our `seg' variable should still be valid! 492 */ 493 if (sc->sc_32bit) { 494 olseg = 495 sonic32toh(sc, sc->sc_tda32[olasttx].tda_fragcnt); 496 sc->sc_tda32[sc->sc_txlast].tda_frags[seg].frag_ptr0 |= 497 htosonic32(sc, TDA_LINK_EOL); 498 SONIC_CDTXSYNC32(sc, sc->sc_txlast, 499 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 500 sc->sc_tda32[olasttx].tda_frags[olseg].frag_ptr0 &= 501 htosonic32(sc, ~TDA_LINK_EOL); 502 SONIC_CDTXSYNC32(sc, olasttx, 503 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 504 } else { 505 olseg = 506 sonic16toh(sc, sc->sc_tda16[olasttx].tda_fragcnt); 507 sc->sc_tda16[sc->sc_txlast].tda_frags[seg].frag_ptr0 |= 508 htosonic16(sc, TDA_LINK_EOL); 509 SONIC_CDTXSYNC16(sc, sc->sc_txlast, 510 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 511 sc->sc_tda16[olasttx].tda_frags[olseg].frag_ptr0 &= 512 htosonic16(sc, ~TDA_LINK_EOL); 513 SONIC_CDTXSYNC16(sc, olasttx, 514 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 515 } 516 517 /* Start the transmitter. */ 518 CSR_WRITE(sc, SONIC_CR, CR_TXP); 519 520 /* Set a watchdog timer in case the chip flakes out. */ 521 ifp->if_timer = 5; 522 } 523 } 524 525 /* 526 * sonic_watchdog: [ifnet interface function] 527 * 528 * Watchdog timer handler. 529 */ 530 void 531 sonic_watchdog(struct ifnet *ifp) 532 { 533 struct sonic_softc *sc = ifp->if_softc; 534 535 printf("%s: device timeout\n", device_xname(sc->sc_dev)); 536 ifp->if_oerrors++; 537 538 (void)sonic_init(ifp); 539 } 540 541 /* 542 * sonic_ioctl: [ifnet interface function] 543 * 544 * Handle control requests from the operator. 545 */ 546 int 547 sonic_ioctl(struct ifnet *ifp, u_long cmd, void *data) 548 { 549 int s, error; 550 551 s = splnet(); 552 553 error = ether_ioctl(ifp, cmd, data); 554 if (error == ENETRESET) { 555 /* 556 * Multicast list has changed; set the hardware 557 * filter accordingly. 558 */ 559 if (ifp->if_flags & IFF_RUNNING) 560 (void)sonic_init(ifp); 561 error = 0; 562 } 563 564 splx(s); 565 return error; 566 } 567 568 /* 569 * sonic_intr: 570 * 571 * Interrupt service routine. 572 */ 573 int 574 sonic_intr(void *arg) 575 { 576 struct sonic_softc *sc = arg; 577 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 578 uint16_t isr; 579 int handled = 0, wantinit; 580 581 for (wantinit = 0; wantinit == 0;) { 582 isr = CSR_READ(sc, SONIC_ISR) & sc->sc_imr; 583 if (isr == 0) 584 break; 585 CSR_WRITE(sc, SONIC_ISR, isr); /* ACK */ 586 587 handled = 1; 588 589 if (isr & IMR_PRX) 590 sonic_rxintr(sc); 591 592 if (isr & (IMR_PTX|IMR_TXER)) { 593 if (sonic_txintr(sc) & TCR_FU) { 594 printf("%s: transmit FIFO underrun\n", 595 device_xname(sc->sc_dev)); 596 wantinit = 1; 597 } 598 } 599 600 if (isr & (IMR_RFO|IMR_RBA|IMR_RBE|IMR_RDE)) { 601 #define PRINTERR(bit, str) \ 602 if (isr & (bit)) \ 603 printf("%s: %s\n",device_xname(sc->sc_dev), str) 604 PRINTERR(IMR_RFO, "receive FIFO overrun"); 605 PRINTERR(IMR_RBA, "receive buffer exceeded"); 606 PRINTERR(IMR_RBE, "receive buffers exhausted"); 607 PRINTERR(IMR_RDE, "receive descriptors exhausted"); 608 wantinit = 1; 609 } 610 } 611 612 if (handled) { 613 if (wantinit) 614 (void)sonic_init(ifp); 615 sonic_start(ifp); 616 } 617 618 return handled; 619 } 620 621 /* 622 * sonic_txintr: 623 * 624 * Helper; handle transmit complete interrupts. 625 */ 626 uint16_t 627 sonic_txintr(struct sonic_softc *sc) 628 { 629 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 630 struct sonic_descsoft *ds; 631 struct sonic_tda32 *tda32; 632 struct sonic_tda16 *tda16; 633 uint16_t status, totstat = 0; 634 int i; 635 636 ifp->if_flags &= ~IFF_OACTIVE; 637 638 for (i = sc->sc_txdirty; sc->sc_txpending != 0; 639 i = SONIC_NEXTTX(i), sc->sc_txpending--) { 640 ds = &sc->sc_txsoft[i]; 641 642 if (sc->sc_32bit) { 643 SONIC_CDTXSYNC32(sc, i, 644 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 645 tda32 = &sc->sc_tda32[i]; 646 status = sonic32toh(sc, tda32->tda_status); 647 SONIC_CDTXSYNC32(sc, i, BUS_DMASYNC_PREREAD); 648 } else { 649 SONIC_CDTXSYNC16(sc, i, 650 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 651 tda16 = &sc->sc_tda16[i]; 652 status = sonic16toh(sc, tda16->tda_status); 653 SONIC_CDTXSYNC16(sc, i, BUS_DMASYNC_PREREAD); 654 } 655 656 if ((status & ~(TCR_EXDIS|TCR_CRCI|TCR_POWC|TCR_PINT)) == 0) 657 break; 658 659 totstat |= status; 660 661 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 0, 662 ds->ds_dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE); 663 bus_dmamap_unload(sc->sc_dmat, ds->ds_dmamap); 664 m_freem(ds->ds_mbuf); 665 ds->ds_mbuf = NULL; 666 667 /* 668 * Check for errors and collisions. 669 */ 670 if (status & TCR_PTX) 671 ifp->if_opackets++; 672 else 673 ifp->if_oerrors++; 674 ifp->if_collisions += TDA_STATUS_NCOL(status); 675 } 676 677 /* Update the dirty transmit buffer pointer. */ 678 sc->sc_txdirty = i; 679 680 /* 681 * Cancel the watchdog timer if there are no pending 682 * transmissions. 683 */ 684 if (sc->sc_txpending == 0) 685 ifp->if_timer = 0; 686 687 return totstat; 688 } 689 690 /* 691 * sonic_rxintr: 692 * 693 * Helper; handle receive interrupts. 694 */ 695 void 696 sonic_rxintr(struct sonic_softc *sc) 697 { 698 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 699 struct sonic_descsoft *ds; 700 struct sonic_rda32 *rda32; 701 struct sonic_rda16 *rda16; 702 struct mbuf *m; 703 int i, len; 704 uint16_t status, bytecount, ptr0, ptr1, seqno; 705 706 for (i = sc->sc_rxptr;; i = SONIC_NEXTRX(i)) { 707 ds = &sc->sc_rxsoft[i]; 708 709 if (sc->sc_32bit) { 710 SONIC_CDRXSYNC32(sc, i, 711 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 712 rda32 = &sc->sc_rda32[i]; 713 SONIC_CDRXSYNC32(sc, i, BUS_DMASYNC_PREREAD); 714 if (rda32->rda_inuse != 0) 715 break; 716 status = sonic32toh(sc, rda32->rda_status); 717 bytecount = sonic32toh(sc, rda32->rda_bytecount); 718 ptr0 = sonic32toh(sc, rda32->rda_pkt_ptr0); 719 ptr1 = sonic32toh(sc, rda32->rda_pkt_ptr1); 720 seqno = sonic32toh(sc, rda32->rda_seqno); 721 } else { 722 SONIC_CDRXSYNC16(sc, i, 723 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 724 rda16 = &sc->sc_rda16[i]; 725 SONIC_CDRXSYNC16(sc, i, BUS_DMASYNC_PREREAD); 726 if (rda16->rda_inuse != 0) 727 break; 728 status = sonic16toh(sc, rda16->rda_status); 729 bytecount = sonic16toh(sc, rda16->rda_bytecount); 730 ptr0 = sonic16toh(sc, rda16->rda_pkt_ptr0); 731 ptr1 = sonic16toh(sc, rda16->rda_pkt_ptr1); 732 seqno = sonic16toh(sc, rda16->rda_seqno); 733 } 734 735 /* 736 * Make absolutely sure this is the only packet 737 * in this receive buffer. Our entire Rx buffer 738 * management scheme depends on this, and if the 739 * SONIC didn't follow our rule, it means we've 740 * misconfigured it. 741 */ 742 KASSERT(status & RCR_LPKT); 743 744 /* 745 * Make sure the packet arrived OK. If an error occurred, 746 * update stats and reset the descriptor. The buffer will 747 * be reused the next time the descriptor comes up in the 748 * ring. 749 */ 750 if ((status & RCR_PRX) == 0) { 751 if (status & RCR_FAER) 752 printf("%s: Rx frame alignment error\n", 753 device_xname(sc->sc_dev)); 754 else if (status & RCR_CRCR) 755 printf("%s: Rx CRC error\n", 756 device_xname(sc->sc_dev)); 757 ifp->if_ierrors++; 758 SONIC_INIT_RXDESC(sc, i); 759 continue; 760 } 761 762 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 0, 763 ds->ds_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 764 765 /* 766 * The SONIC includes the CRC with every packet. 767 */ 768 len = bytecount - ETHER_CRC_LEN; 769 770 /* 771 * Ok, if the chip is in 32-bit mode, then receive 772 * buffers must be aligned to 32-bit boundaries, 773 * which means the payload is misaligned. In this 774 * case, we must allocate a new mbuf, and copy the 775 * packet into it, scooted forward 2 bytes to ensure 776 * proper alignment. 777 * 778 * Note, in 16-bit mode, we can configure the SONIC 779 * to do what we want, and we have. 780 */ 781 #ifndef __NO_STRICT_ALIGNMENT 782 if (sc->sc_32bit) { 783 MGETHDR(m, M_DONTWAIT, MT_DATA); 784 if (m == NULL) 785 goto dropit; 786 if (len > (MHLEN - 2)) { 787 MCLGET(m, M_DONTWAIT); 788 if ((m->m_flags & M_EXT) == 0) 789 goto dropit; 790 } 791 m->m_data += 2; 792 /* 793 * Note that we use a cluster for incoming frames, 794 * so the buffer is virtually contiguous. 795 */ 796 memcpy(mtod(m, void *), mtod(ds->ds_mbuf, void *), 797 len); 798 SONIC_INIT_RXDESC(sc, i); 799 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 0, 800 ds->ds_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 801 } else 802 #endif /* ! __NO_STRICT_ALIGNMENT */ 803 /* 804 * If the packet is small enough to fit in a single 805 * header mbuf, allocate one and copy the data into 806 * it. This greatly reduces memory consumption when 807 * we receive lots of small packets. 808 */ 809 if (sonic_copy_small != 0 && len <= (MHLEN - 2)) { 810 MGETHDR(m, M_DONTWAIT, MT_DATA); 811 if (m == NULL) 812 goto dropit; 813 m->m_data += 2; 814 /* 815 * Note that we use a cluster for incoming frames, 816 * so the buffer is virtually contiguous. 817 */ 818 memcpy(mtod(m, void *), mtod(ds->ds_mbuf, void *), 819 len); 820 SONIC_INIT_RXDESC(sc, i); 821 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 0, 822 ds->ds_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 823 } else { 824 m = ds->ds_mbuf; 825 if (sonic_add_rxbuf(sc, i) != 0) { 826 dropit: 827 ifp->if_ierrors++; 828 SONIC_INIT_RXDESC(sc, i); 829 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 0, 830 ds->ds_dmamap->dm_mapsize, 831 BUS_DMASYNC_PREREAD); 832 continue; 833 } 834 } 835 836 ifp->if_ipackets++; 837 m->m_pkthdr.rcvif = ifp; 838 m->m_pkthdr.len = m->m_len = len; 839 840 /* 841 * Pass this up to any BPF listeners. 842 */ 843 bpf_mtap(ifp, m); 844 845 /* Pass it on. */ 846 (*ifp->if_input)(ifp, m); 847 } 848 849 /* Update the receive pointer. */ 850 sc->sc_rxptr = i; 851 CSR_WRITE(sc, SONIC_RWR, SONIC_CDRRADDR(sc, SONIC_PREVRX(i))); 852 } 853 854 /* 855 * sonic_reset: 856 * 857 * Perform a soft reset on the SONIC. 858 */ 859 void 860 sonic_reset(struct sonic_softc *sc) 861 { 862 863 /* stop TX, RX and timer, and ensure RST is clear */ 864 CSR_WRITE(sc, SONIC_CR, CR_STP | CR_RXDIS | CR_HTX); 865 delay(1000); 866 867 CSR_WRITE(sc, SONIC_CR, CR_RST); 868 delay(1000); 869 870 /* clear all interrupts */ 871 CSR_WRITE(sc, SONIC_IMR, 0); 872 CSR_WRITE(sc, SONIC_ISR, IMR_ALL); 873 874 CSR_WRITE(sc, SONIC_CR, 0); 875 delay(1000); 876 } 877 878 /* 879 * sonic_init: [ifnet interface function] 880 * 881 * Initialize the interface. Must be called at splnet(). 882 */ 883 int 884 sonic_init(struct ifnet *ifp) 885 { 886 struct sonic_softc *sc = ifp->if_softc; 887 struct sonic_descsoft *ds; 888 int i, error = 0; 889 uint16_t reg; 890 891 /* 892 * Cancel any pending I/O. 893 */ 894 sonic_stop(ifp, 0); 895 896 /* 897 * Reset the SONIC to a known state. 898 */ 899 sonic_reset(sc); 900 901 /* 902 * Bring the SONIC into reset state, and program the DCR. 903 * 904 * Note: We don't bother optimizing the transmit and receive 905 * thresholds, here. TFT/RFT values should be set in MD attachments. 906 */ 907 reg = sc->sc_dcr; 908 if (sc->sc_32bit) 909 reg |= DCR_DW; 910 CSR_WRITE(sc, SONIC_CR, CR_RST); 911 CSR_WRITE(sc, SONIC_DCR, reg); 912 CSR_WRITE(sc, SONIC_DCR2, sc->sc_dcr2); 913 CSR_WRITE(sc, SONIC_CR, 0); 914 915 /* 916 * Initialize the transmit descriptors. 917 */ 918 if (sc->sc_32bit) { 919 for (i = 0; i < SONIC_NTXDESC; i++) { 920 memset(&sc->sc_tda32[i], 0, sizeof(struct sonic_tda32)); 921 SONIC_CDTXSYNC32(sc, i, 922 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 923 } 924 } else { 925 for (i = 0; i < SONIC_NTXDESC; i++) { 926 memset(&sc->sc_tda16[i], 0, sizeof(struct sonic_tda16)); 927 SONIC_CDTXSYNC16(sc, i, 928 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 929 } 930 } 931 sc->sc_txpending = 0; 932 sc->sc_txdirty = 0; 933 sc->sc_txlast = SONIC_NTXDESC - 1; 934 935 /* 936 * Initialize the receive descriptor ring. 937 */ 938 for (i = 0; i < SONIC_NRXDESC; i++) { 939 ds = &sc->sc_rxsoft[i]; 940 if (ds->ds_mbuf == NULL) { 941 if ((error = sonic_add_rxbuf(sc, i)) != 0) { 942 printf("%s: unable to allocate or map Rx " 943 "buffer %d, error = %d\n", 944 device_xname(sc->sc_dev), i, error); 945 /* 946 * XXX Should attempt to run with fewer receive 947 * XXX buffers instead of just failing. 948 */ 949 sonic_rxdrain(sc); 950 goto out; 951 } 952 } else 953 SONIC_INIT_RXDESC(sc, i); 954 } 955 sc->sc_rxptr = 0; 956 957 /* Give the transmit ring to the SONIC. */ 958 CSR_WRITE(sc, SONIC_UTDAR, (SONIC_CDTXADDR(sc, 0) >> 16) & 0xffff); 959 CSR_WRITE(sc, SONIC_CTDAR, SONIC_CDTXADDR(sc, 0) & 0xffff); 960 961 /* Give the receive descriptor ring to the SONIC. */ 962 CSR_WRITE(sc, SONIC_URDAR, (SONIC_CDRXADDR(sc, 0) >> 16) & 0xffff); 963 CSR_WRITE(sc, SONIC_CRDAR, SONIC_CDRXADDR(sc, 0) & 0xffff); 964 965 /* Give the receive buffer ring to the SONIC. */ 966 CSR_WRITE(sc, SONIC_URRAR, (SONIC_CDRRADDR(sc, 0) >> 16) & 0xffff); 967 CSR_WRITE(sc, SONIC_RSAR, SONIC_CDRRADDR(sc, 0) & 0xffff); 968 if (sc->sc_32bit) 969 CSR_WRITE(sc, SONIC_REAR, 970 (SONIC_CDRRADDR(sc, SONIC_NRXDESC - 1) + 971 sizeof(struct sonic_rra32)) & 0xffff); 972 else 973 CSR_WRITE(sc, SONIC_REAR, 974 (SONIC_CDRRADDR(sc, SONIC_NRXDESC - 1) + 975 sizeof(struct sonic_rra16)) & 0xffff); 976 CSR_WRITE(sc, SONIC_RRR, SONIC_CDRRADDR(sc, 0) & 0xffff); 977 CSR_WRITE(sc, SONIC_RWR, SONIC_CDRRADDR(sc, SONIC_NRXDESC - 1)); 978 979 /* 980 * Set the End-Of-Buffer counter such that only one packet 981 * will be placed into each buffer we provide. Note we are 982 * following the recommendation of section 3.4.4 of the manual 983 * here, and have "lengthened" the receive buffers accordingly. 984 */ 985 if (sc->sc_32bit) 986 CSR_WRITE(sc, SONIC_EOBC, (ETHER_MAX_LEN + 2) / 2); 987 else 988 CSR_WRITE(sc, SONIC_EOBC, (ETHER_MAX_LEN / 2)); 989 990 /* Reset the receive sequence counter. */ 991 CSR_WRITE(sc, SONIC_RSC, 0); 992 993 /* Clear the tally registers. */ 994 CSR_WRITE(sc, SONIC_CRCETC, 0xffff); 995 CSR_WRITE(sc, SONIC_FAET, 0xffff); 996 CSR_WRITE(sc, SONIC_MPT, 0xffff); 997 998 /* Set the receive filter. */ 999 sonic_set_filter(sc); 1000 1001 /* 1002 * Set the interrupt mask register. 1003 */ 1004 sc->sc_imr = IMR_RFO | IMR_RBA | IMR_RBE | IMR_RDE | 1005 IMR_TXER | IMR_PTX | IMR_PRX; 1006 CSR_WRITE(sc, SONIC_IMR, sc->sc_imr); 1007 1008 /* 1009 * Start the receive process in motion. Note, we don't 1010 * start the transmit process until we actually try to 1011 * transmit packets. 1012 */ 1013 CSR_WRITE(sc, SONIC_CR, CR_RXEN | CR_RRRA); 1014 1015 /* 1016 * ...all done! 1017 */ 1018 ifp->if_flags |= IFF_RUNNING; 1019 ifp->if_flags &= ~IFF_OACTIVE; 1020 1021 out: 1022 if (error) 1023 printf("%s: interface not running\n", device_xname(sc->sc_dev)); 1024 return error; 1025 } 1026 1027 /* 1028 * sonic_rxdrain: 1029 * 1030 * Drain the receive queue. 1031 */ 1032 void 1033 sonic_rxdrain(struct sonic_softc *sc) 1034 { 1035 struct sonic_descsoft *ds; 1036 int i; 1037 1038 for (i = 0; i < SONIC_NRXDESC; i++) { 1039 ds = &sc->sc_rxsoft[i]; 1040 if (ds->ds_mbuf != NULL) { 1041 bus_dmamap_unload(sc->sc_dmat, ds->ds_dmamap); 1042 m_freem(ds->ds_mbuf); 1043 ds->ds_mbuf = NULL; 1044 } 1045 } 1046 } 1047 1048 /* 1049 * sonic_stop: [ifnet interface function] 1050 * 1051 * Stop transmission on the interface. 1052 */ 1053 void 1054 sonic_stop(struct ifnet *ifp, int disable) 1055 { 1056 struct sonic_softc *sc = ifp->if_softc; 1057 struct sonic_descsoft *ds; 1058 int i; 1059 1060 /* 1061 * Disable interrupts. 1062 */ 1063 CSR_WRITE(sc, SONIC_IMR, 0); 1064 1065 /* 1066 * Stop the transmitter, receiver, and timer. 1067 */ 1068 CSR_WRITE(sc, SONIC_CR, CR_HTX|CR_RXDIS|CR_STP); 1069 for (i = 0; i < 1000; i++) { 1070 if ((CSR_READ(sc, SONIC_CR) & (CR_TXP|CR_RXEN|CR_ST)) == 0) 1071 break; 1072 delay(2); 1073 } 1074 if ((CSR_READ(sc, SONIC_CR) & (CR_TXP|CR_RXEN|CR_ST)) != 0) 1075 printf("%s: SONIC failed to stop\n", device_xname(sc->sc_dev)); 1076 1077 /* 1078 * Release any queued transmit buffers. 1079 */ 1080 for (i = 0; i < SONIC_NTXDESC; i++) { 1081 ds = &sc->sc_txsoft[i]; 1082 if (ds->ds_mbuf != NULL) { 1083 bus_dmamap_unload(sc->sc_dmat, ds->ds_dmamap); 1084 m_freem(ds->ds_mbuf); 1085 ds->ds_mbuf = NULL; 1086 } 1087 } 1088 1089 /* 1090 * Mark the interface down and cancel the watchdog timer. 1091 */ 1092 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1093 ifp->if_timer = 0; 1094 1095 if (disable) 1096 sonic_rxdrain(sc); 1097 } 1098 1099 /* 1100 * sonic_add_rxbuf: 1101 * 1102 * Add a receive buffer to the indicated descriptor. 1103 */ 1104 int 1105 sonic_add_rxbuf(struct sonic_softc *sc, int idx) 1106 { 1107 struct sonic_descsoft *ds = &sc->sc_rxsoft[idx]; 1108 struct mbuf *m; 1109 int error; 1110 1111 MGETHDR(m, M_DONTWAIT, MT_DATA); 1112 if (m == NULL) 1113 return ENOBUFS; 1114 1115 MCLGET(m, M_DONTWAIT); 1116 if ((m->m_flags & M_EXT) == 0) { 1117 m_freem(m); 1118 return ENOBUFS; 1119 } 1120 1121 if (ds->ds_mbuf != NULL) 1122 bus_dmamap_unload(sc->sc_dmat, ds->ds_dmamap); 1123 1124 ds->ds_mbuf = m; 1125 1126 error = bus_dmamap_load(sc->sc_dmat, ds->ds_dmamap, 1127 m->m_ext.ext_buf, m->m_ext.ext_size, NULL, 1128 BUS_DMA_READ|BUS_DMA_NOWAIT); 1129 if (error) { 1130 printf("%s: can't load rx DMA map %d, error = %d\n", 1131 device_xname(sc->sc_dev), idx, error); 1132 panic("sonic_add_rxbuf"); /* XXX */ 1133 } 1134 1135 bus_dmamap_sync(sc->sc_dmat, ds->ds_dmamap, 0, 1136 ds->ds_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 1137 1138 SONIC_INIT_RXDESC(sc, idx); 1139 1140 return 0; 1141 } 1142 1143 static void 1144 sonic_set_camentry(struct sonic_softc *sc, int entry, const uint8_t *enaddr) 1145 { 1146 1147 if (sc->sc_32bit) { 1148 struct sonic_cda32 *cda = &sc->sc_cda32[entry]; 1149 1150 cda->cda_entry = htosonic32(sc, entry); 1151 cda->cda_addr0 = htosonic32(sc, enaddr[0] | (enaddr[1] << 8)); 1152 cda->cda_addr1 = htosonic32(sc, enaddr[2] | (enaddr[3] << 8)); 1153 cda->cda_addr2 = htosonic32(sc, enaddr[4] | (enaddr[5] << 8)); 1154 } else { 1155 struct sonic_cda16 *cda = &sc->sc_cda16[entry]; 1156 1157 cda->cda_entry = htosonic16(sc, entry); 1158 cda->cda_addr0 = htosonic16(sc, enaddr[0] | (enaddr[1] << 8)); 1159 cda->cda_addr1 = htosonic16(sc, enaddr[2] | (enaddr[3] << 8)); 1160 cda->cda_addr2 = htosonic16(sc, enaddr[4] | (enaddr[5] << 8)); 1161 } 1162 } 1163 1164 /* 1165 * sonic_set_filter: 1166 * 1167 * Set the SONIC receive filter. 1168 */ 1169 void 1170 sonic_set_filter(struct sonic_softc *sc) 1171 { 1172 struct ethercom *ec = &sc->sc_ethercom; 1173 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1174 struct ether_multi *enm; 1175 struct ether_multistep step; 1176 int i, entry = 0; 1177 uint16_t camvalid = 0; 1178 uint16_t rcr = 0; 1179 1180 if (ifp->if_flags & IFF_BROADCAST) 1181 rcr |= RCR_BRD; 1182 1183 if (ifp->if_flags & IFF_PROMISC) { 1184 rcr |= RCR_PRO; 1185 goto allmulti; 1186 } 1187 1188 /* Put our station address in the first CAM slot. */ 1189 sonic_set_camentry(sc, entry, CLLADDR(ifp->if_sadl)); 1190 camvalid |= (1U << entry); 1191 entry++; 1192 1193 /* Add the multicast addresses to the CAM. */ 1194 ETHER_FIRST_MULTI(step, ec, enm); 1195 while (enm != NULL) { 1196 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) { 1197 /* 1198 * We must listen to a range of multicast addresses. 1199 * The only way to do this on the SONIC is to enable 1200 * reception of all multicast packets. 1201 */ 1202 goto allmulti; 1203 } 1204 1205 if (entry == SONIC_NCAMENT) { 1206 /* 1207 * Out of CAM slots. Have to enable reception 1208 * of all multicast addresses. 1209 */ 1210 goto allmulti; 1211 } 1212 1213 sonic_set_camentry(sc, entry, enm->enm_addrlo); 1214 camvalid |= (1U << entry); 1215 entry++; 1216 1217 ETHER_NEXT_MULTI(step, enm); 1218 } 1219 1220 ifp->if_flags &= ~IFF_ALLMULTI; 1221 goto setit; 1222 1223 allmulti: 1224 /* Use only the first CAM slot (station address). */ 1225 camvalid = 0x0001; 1226 entry = 1; 1227 rcr |= RCR_AMC; 1228 1229 setit: 1230 /* set mask for the CAM Enable register */ 1231 if (sc->sc_32bit) { 1232 if (entry == SONIC_NCAMENT) 1233 sc->sc_cdaenable32 = htosonic32(sc, camvalid); 1234 else 1235 sc->sc_cda32[entry].cda_entry = 1236 htosonic32(sc, camvalid); 1237 } else { 1238 if (entry == SONIC_NCAMENT) 1239 sc->sc_cdaenable16 = htosonic16(sc, camvalid); 1240 else 1241 sc->sc_cda16[entry].cda_entry = 1242 htosonic16(sc, camvalid); 1243 } 1244 1245 /* Load the CAM. */ 1246 SONIC_CDCAMSYNC(sc, BUS_DMASYNC_PREWRITE); 1247 CSR_WRITE(sc, SONIC_CDP, SONIC_CDCAMADDR(sc) & 0xffff); 1248 CSR_WRITE(sc, SONIC_CDC, entry); 1249 CSR_WRITE(sc, SONIC_CR, CR_LCAM); 1250 for (i = 0; i < 10000; i++) { 1251 if ((CSR_READ(sc, SONIC_CR) & CR_LCAM) == 0) 1252 break; 1253 delay(2); 1254 } 1255 if (CSR_READ(sc, SONIC_CR) & CR_LCAM) 1256 printf("%s: CAM load failed\n", device_xname(sc->sc_dev)); 1257 SONIC_CDCAMSYNC(sc, BUS_DMASYNC_POSTWRITE); 1258 1259 /* Set the receive control register. */ 1260 CSR_WRITE(sc, SONIC_RCR, rcr); 1261 }
Cache object: 0566cda6d3e02b9b87f4a476c243b856
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