Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/bfe/if_bfe.c
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1 /* 2 * Copyright (c) 2003 Stuart Walsh<stu@ipng.org.uk> 3 * and Duncan Barclay<dmlb@dmlb.org> 4 */ 5 6 /* 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS 'AS IS' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD: releng/5.2/sys/dev/bfe/if_bfe.c 122689 2003-11-14 19:00:32Z sam $"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/sockio.h> 36 #include <sys/mbuf.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 #include <sys/socket.h> 40 #include <sys/queue.h> 41 42 #include <net/if.h> 43 #include <net/if_arp.h> 44 #include <net/ethernet.h> 45 #include <net/if_dl.h> 46 #include <net/if_media.h> 47 48 #include <net/bpf.h> 49 50 #include <net/if_types.h> 51 #include <net/if_vlan_var.h> 52 53 #include <netinet/in_systm.h> 54 #include <netinet/in.h> 55 #include <netinet/ip.h> 56 57 #include <machine/clock.h> /* for DELAY */ 58 #include <machine/bus_memio.h> 59 #include <machine/bus.h> 60 #include <machine/resource.h> 61 #include <sys/bus.h> 62 #include <sys/rman.h> 63 64 #include <dev/mii/mii.h> 65 #include <dev/mii/miivar.h> 66 #include "miidevs.h" 67 68 #include <dev/pci/pcireg.h> 69 #include <dev/pci/pcivar.h> 70 71 #include <dev/bfe/if_bfereg.h> 72 73 MODULE_DEPEND(bfe, pci, 1, 1, 1); 74 MODULE_DEPEND(bfe, ether, 1, 1, 1); 75 MODULE_DEPEND(bfe, miibus, 1, 1, 1); 76 77 /* "controller miibus0" required. See GENERIC if you get errors here. */ 78 #include "miibus_if.h" 79 80 #define BFE_DEVDESC_MAX 64 /* Maximum device description length */ 81 82 static struct bfe_type bfe_devs[] = { 83 { BCOM_VENDORID, BCOM_DEVICEID_BCM4401, 84 "Broadcom BCM4401 Fast Ethernet" }, 85 { 0, 0, NULL } 86 }; 87 88 static int bfe_probe (device_t); 89 static int bfe_attach (device_t); 90 static int bfe_detach (device_t); 91 static void bfe_release_resources (struct bfe_softc *); 92 static void bfe_intr (void *); 93 static void bfe_start (struct ifnet *); 94 static int bfe_ioctl (struct ifnet *, u_long, caddr_t); 95 static void bfe_init (void *); 96 static void bfe_stop (struct bfe_softc *); 97 static void bfe_watchdog (struct ifnet *); 98 static void bfe_shutdown (device_t); 99 static void bfe_tick (void *); 100 static void bfe_txeof (struct bfe_softc *); 101 static void bfe_rxeof (struct bfe_softc *); 102 static void bfe_set_rx_mode (struct bfe_softc *); 103 static int bfe_list_rx_init (struct bfe_softc *); 104 static int bfe_list_newbuf (struct bfe_softc *, int, struct mbuf*); 105 static void bfe_rx_ring_free (struct bfe_softc *); 106 107 static void bfe_pci_setup (struct bfe_softc *, u_int32_t); 108 static int bfe_ifmedia_upd (struct ifnet *); 109 static void bfe_ifmedia_sts (struct ifnet *, struct ifmediareq *); 110 static int bfe_miibus_readreg (device_t, int, int); 111 static int bfe_miibus_writereg (device_t, int, int, int); 112 static void bfe_miibus_statchg (device_t); 113 static int bfe_wait_bit (struct bfe_softc *, u_int32_t, u_int32_t, 114 u_long, const int); 115 static void bfe_get_config (struct bfe_softc *sc); 116 static void bfe_read_eeprom (struct bfe_softc *, u_int8_t *); 117 static void bfe_stats_update (struct bfe_softc *); 118 static void bfe_clear_stats (struct bfe_softc *); 119 static int bfe_readphy (struct bfe_softc *, u_int32_t, u_int32_t*); 120 static int bfe_writephy (struct bfe_softc *, u_int32_t, u_int32_t); 121 static int bfe_resetphy (struct bfe_softc *); 122 static int bfe_setupphy (struct bfe_softc *); 123 static void bfe_chip_reset (struct bfe_softc *); 124 static void bfe_chip_halt (struct bfe_softc *); 125 static void bfe_core_reset (struct bfe_softc *); 126 static void bfe_core_disable (struct bfe_softc *); 127 static int bfe_dma_alloc (device_t); 128 static void bfe_dma_map_desc (void *, bus_dma_segment_t *, int, int); 129 static void bfe_dma_map (void *, bus_dma_segment_t *, int, int); 130 static void bfe_cam_write (struct bfe_softc *, u_char *, int); 131 132 static device_method_t bfe_methods[] = { 133 /* Device interface */ 134 DEVMETHOD(device_probe, bfe_probe), 135 DEVMETHOD(device_attach, bfe_attach), 136 DEVMETHOD(device_detach, bfe_detach), 137 DEVMETHOD(device_shutdown, bfe_shutdown), 138 139 /* bus interface */ 140 DEVMETHOD(bus_print_child, bus_generic_print_child), 141 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 142 143 /* MII interface */ 144 DEVMETHOD(miibus_readreg, bfe_miibus_readreg), 145 DEVMETHOD(miibus_writereg, bfe_miibus_writereg), 146 DEVMETHOD(miibus_statchg, bfe_miibus_statchg), 147 148 { 0, 0 } 149 }; 150 151 static driver_t bfe_driver = { 152 "bfe", 153 bfe_methods, 154 sizeof(struct bfe_softc) 155 }; 156 157 static devclass_t bfe_devclass; 158 159 DRIVER_MODULE(bfe, pci, bfe_driver, bfe_devclass, 0, 0); 160 DRIVER_MODULE(miibus, bfe, miibus_driver, miibus_devclass, 0, 0); 161 162 /* 163 * Probe for a Broadcom 4401 chip. 164 */ 165 static int 166 bfe_probe(device_t dev) 167 { 168 struct bfe_type *t; 169 struct bfe_softc *sc; 170 171 t = bfe_devs; 172 173 sc = device_get_softc(dev); 174 bzero(sc, sizeof(struct bfe_softc)); 175 sc->bfe_unit = device_get_unit(dev); 176 sc->bfe_dev = dev; 177 178 while(t->bfe_name != NULL) { 179 if ((pci_get_vendor(dev) == t->bfe_vid) && 180 (pci_get_device(dev) == t->bfe_did)) { 181 device_set_desc_copy(dev, t->bfe_name); 182 return(0); 183 } 184 t++; 185 } 186 187 return(ENXIO); 188 } 189 190 static int 191 bfe_dma_alloc(device_t dev) 192 { 193 struct bfe_softc *sc; 194 int error, i; 195 196 sc = device_get_softc(dev); 197 198 /* parent tag */ 199 error = bus_dma_tag_create(NULL, /* parent */ 200 PAGE_SIZE, 0, /* alignment, boundary */ 201 BUS_SPACE_MAXADDR, /* lowaddr */ 202 BUS_SPACE_MAXADDR_32BIT, /* highaddr */ 203 NULL, NULL, /* filter, filterarg */ 204 MAXBSIZE, /* maxsize */ 205 BUS_SPACE_UNRESTRICTED, /* num of segments */ 206 BUS_SPACE_MAXSIZE_32BIT, /* max segment size */ 207 BUS_DMA_ALLOCNOW, /* flags */ 208 NULL, NULL, /* lockfunc, lockarg */ 209 &sc->bfe_parent_tag); 210 211 /* tag for TX ring */ 212 error = bus_dma_tag_create(sc->bfe_parent_tag, BFE_TX_LIST_SIZE, 213 BFE_TX_LIST_SIZE, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, 214 NULL, NULL, BFE_TX_LIST_SIZE, 1, BUS_SPACE_MAXSIZE_32BIT, 215 0, NULL, NULL, &sc->bfe_tx_tag); 216 217 if (error) { 218 device_printf(dev, "could not allocate dma tag\n"); 219 return(ENOMEM); 220 } 221 222 /* tag for RX ring */ 223 error = bus_dma_tag_create(sc->bfe_parent_tag, BFE_RX_LIST_SIZE, 224 BFE_RX_LIST_SIZE, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, 225 NULL, NULL, BFE_RX_LIST_SIZE, 1, BUS_SPACE_MAXSIZE_32BIT, 226 0, NULL, NULL, &sc->bfe_rx_tag); 227 228 if (error) { 229 device_printf(dev, "could not allocate dma tag\n"); 230 return(ENOMEM); 231 } 232 233 /* tag for mbufs */ 234 error = bus_dma_tag_create(sc->bfe_parent_tag, ETHER_ALIGN, 0, 235 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 236 1, BUS_SPACE_MAXSIZE_32BIT, 0, NULL, NULL, &sc->bfe_tag); 237 238 if (error) { 239 device_printf(dev, "could not allocate dma tag\n"); 240 return(ENOMEM); 241 } 242 243 /* pre allocate dmamaps for RX list */ 244 for (i = 0; i < BFE_RX_LIST_CNT; i++) { 245 error = bus_dmamap_create(sc->bfe_tag, 0, &sc->bfe_rx_ring[i].bfe_map); 246 if (error) { 247 device_printf(dev, "cannot create DMA map for RX\n"); 248 return(ENOMEM); 249 } 250 } 251 252 /* pre allocate dmamaps for TX list */ 253 for (i = 0; i < BFE_TX_LIST_CNT; i++) { 254 error = bus_dmamap_create(sc->bfe_tag, 0, &sc->bfe_tx_ring[i].bfe_map); 255 if (error) { 256 device_printf(dev, "cannot create DMA map for TX\n"); 257 return(ENOMEM); 258 } 259 } 260 261 /* Alloc dma for rx ring */ 262 error = bus_dmamem_alloc(sc->bfe_rx_tag, (void *)&sc->bfe_rx_list, 263 BUS_DMA_NOWAIT, &sc->bfe_rx_map); 264 265 if(error) 266 return(ENOMEM); 267 268 bzero(sc->bfe_rx_list, BFE_RX_LIST_SIZE); 269 error = bus_dmamap_load(sc->bfe_rx_tag, sc->bfe_rx_map, 270 sc->bfe_rx_list, sizeof(struct bfe_desc), 271 bfe_dma_map, &sc->bfe_rx_dma, 0); 272 273 if(error) 274 return(ENOMEM); 275 276 bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map, BUS_DMASYNC_PREREAD); 277 278 error = bus_dmamem_alloc(sc->bfe_tx_tag, (void *)&sc->bfe_tx_list, 279 BUS_DMA_NOWAIT, &sc->bfe_tx_map); 280 if (error) 281 return(ENOMEM); 282 283 284 error = bus_dmamap_load(sc->bfe_tx_tag, sc->bfe_tx_map, 285 sc->bfe_tx_list, sizeof(struct bfe_desc), 286 bfe_dma_map, &sc->bfe_tx_dma, 0); 287 if(error) 288 return(ENOMEM); 289 290 bzero(sc->bfe_tx_list, BFE_TX_LIST_SIZE); 291 bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map, BUS_DMASYNC_PREREAD); 292 293 return(0); 294 } 295 296 static int 297 bfe_attach(device_t dev) 298 { 299 struct ifnet *ifp; 300 struct bfe_softc *sc; 301 int unit, error = 0, rid; 302 303 sc = device_get_softc(dev); 304 mtx_init(&sc->bfe_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 305 MTX_DEF | MTX_RECURSE); 306 307 unit = device_get_unit(dev); 308 sc->bfe_dev = dev; 309 sc->bfe_unit = unit; 310 311 /* 312 * Handle power management nonsense. 313 */ 314 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 315 u_int32_t membase, irq; 316 317 /* Save important PCI config data. */ 318 membase = pci_read_config(dev, BFE_PCI_MEMLO, 4); 319 irq = pci_read_config(dev, BFE_PCI_INTLINE, 4); 320 321 /* Reset the power state. */ 322 printf("bfe%d: chip is is in D%d power mode -- setting to D0\n", 323 sc->bfe_unit, pci_get_powerstate(dev)); 324 325 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 326 327 /* Restore PCI config data. */ 328 pci_write_config(dev, BFE_PCI_MEMLO, membase, 4); 329 pci_write_config(dev, BFE_PCI_INTLINE, irq, 4); 330 } 331 332 /* 333 * Map control/status registers. 334 */ 335 pci_enable_busmaster(dev); 336 337 rid = BFE_PCI_MEMLO; 338 sc->bfe_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 1, 339 RF_ACTIVE); 340 if (sc->bfe_res == NULL) { 341 printf ("bfe%d: couldn't map memory\n", unit); 342 error = ENXIO; 343 goto fail; 344 } 345 346 sc->bfe_btag = rman_get_bustag(sc->bfe_res); 347 sc->bfe_bhandle = rman_get_bushandle(sc->bfe_res); 348 sc->bfe_vhandle = (vm_offset_t)rman_get_virtual(sc->bfe_res); 349 350 /* Allocate interrupt */ 351 rid = 0; 352 353 sc->bfe_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, 354 RF_SHAREABLE | RF_ACTIVE); 355 if (sc->bfe_irq == NULL) { 356 printf("bfe%d: couldn't map interrupt\n", unit); 357 error = ENXIO; 358 goto fail; 359 } 360 361 if (bfe_dma_alloc(dev)) { 362 printf("bfe%d: failed to allocate DMA resources\n", sc->bfe_unit); 363 bfe_release_resources(sc); 364 error = ENXIO; 365 goto fail; 366 } 367 368 /* Set up ifnet structure */ 369 ifp = &sc->arpcom.ac_if; 370 ifp->if_softc = sc; 371 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 372 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 373 ifp->if_ioctl = bfe_ioctl; 374 ifp->if_output = ether_output; 375 ifp->if_start = bfe_start; 376 ifp->if_watchdog = bfe_watchdog; 377 ifp->if_init = bfe_init; 378 ifp->if_mtu = ETHERMTU; 379 ifp->if_baudrate = 10000000; 380 ifp->if_snd.ifq_maxlen = BFE_TX_QLEN; 381 382 bfe_get_config(sc); 383 384 printf("bfe%d: Ethernet address: %6D\n", unit, sc->arpcom.ac_enaddr, ":"); 385 386 /* Reset the chip and turn on the PHY */ 387 bfe_chip_reset(sc); 388 389 if (mii_phy_probe(dev, &sc->bfe_miibus, 390 bfe_ifmedia_upd, bfe_ifmedia_sts)) { 391 printf("bfe%d: MII without any PHY!\n", sc->bfe_unit); 392 error = ENXIO; 393 goto fail; 394 } 395 396 ether_ifattach(ifp, sc->arpcom.ac_enaddr); 397 callout_handle_init(&sc->bfe_stat_ch); 398 399 /* 400 * Hook interrupt last to avoid having to lock softc 401 */ 402 error = bus_setup_intr(dev, sc->bfe_irq, INTR_TYPE_NET, 403 bfe_intr, sc, &sc->bfe_intrhand); 404 405 if (error) { 406 bfe_release_resources(sc); 407 printf("bfe%d: couldn't set up irq\n", unit); 408 goto fail; 409 } 410 fail: 411 if(error) 412 bfe_release_resources(sc); 413 return(error); 414 } 415 416 static int 417 bfe_detach(device_t dev) 418 { 419 struct bfe_softc *sc; 420 struct ifnet *ifp; 421 422 sc = device_get_softc(dev); 423 424 KASSERT(mtx_initialized(&sc->bfe_mtx), ("bfe mutex not initialized")); 425 BFE_LOCK(scp); 426 427 ifp = &sc->arpcom.ac_if; 428 429 if (device_is_attached(dev)) { 430 bfe_stop(sc); 431 ether_ifdetach(ifp); 432 } 433 434 bfe_chip_reset(sc); 435 436 bus_generic_detach(dev); 437 if(sc->bfe_miibus != NULL) 438 device_delete_child(dev, sc->bfe_miibus); 439 440 bfe_release_resources(sc); 441 BFE_UNLOCK(sc); 442 mtx_destroy(&sc->bfe_mtx); 443 444 return(0); 445 } 446 447 /* 448 * Stop all chip I/O so that the kernel's probe routines don't 449 * get confused by errant DMAs when rebooting. 450 */ 451 static void 452 bfe_shutdown(device_t dev) 453 { 454 struct bfe_softc *sc; 455 456 sc = device_get_softc(dev); 457 BFE_LOCK(sc); 458 bfe_stop(sc); 459 460 BFE_UNLOCK(sc); 461 return; 462 } 463 464 static int 465 bfe_miibus_readreg(device_t dev, int phy, int reg) 466 { 467 struct bfe_softc *sc; 468 u_int32_t ret; 469 470 sc = device_get_softc(dev); 471 if(phy != sc->bfe_phyaddr) 472 return(0); 473 bfe_readphy(sc, reg, &ret); 474 475 return(ret); 476 } 477 478 static int 479 bfe_miibus_writereg(device_t dev, int phy, int reg, int val) 480 { 481 struct bfe_softc *sc; 482 483 sc = device_get_softc(dev); 484 if(phy != sc->bfe_phyaddr) 485 return(0); 486 bfe_writephy(sc, reg, val); 487 488 return(0); 489 } 490 491 static void 492 bfe_miibus_statchg(device_t dev) 493 { 494 return; 495 } 496 497 static void 498 bfe_tx_ring_free(struct bfe_softc *sc) 499 { 500 int i; 501 502 for(i = 0; i < BFE_TX_LIST_CNT; i++) { 503 if(sc->bfe_tx_ring[i].bfe_mbuf != NULL) { 504 m_freem(sc->bfe_tx_ring[i].bfe_mbuf); 505 sc->bfe_tx_ring[i].bfe_mbuf = NULL; 506 bus_dmamap_unload(sc->bfe_tag, 507 sc->bfe_tx_ring[i].bfe_map); 508 bus_dmamap_destroy(sc->bfe_tag, 509 sc->bfe_tx_ring[i].bfe_map); 510 } 511 } 512 bzero(sc->bfe_tx_list, BFE_TX_LIST_SIZE); 513 bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map, BUS_DMASYNC_PREREAD); 514 } 515 516 static void 517 bfe_rx_ring_free(struct bfe_softc *sc) 518 { 519 int i; 520 521 for (i = 0; i < BFE_RX_LIST_CNT; i++) { 522 if (sc->bfe_rx_ring[i].bfe_mbuf != NULL) { 523 m_freem(sc->bfe_rx_ring[i].bfe_mbuf); 524 sc->bfe_rx_ring[i].bfe_mbuf = NULL; 525 bus_dmamap_unload(sc->bfe_tag, 526 sc->bfe_rx_ring[i].bfe_map); 527 bus_dmamap_destroy(sc->bfe_tag, 528 sc->bfe_rx_ring[i].bfe_map); 529 } 530 } 531 bzero(sc->bfe_rx_list, BFE_RX_LIST_SIZE); 532 bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map, BUS_DMASYNC_PREREAD); 533 } 534 535 536 static int 537 bfe_list_rx_init(struct bfe_softc *sc) 538 { 539 int i; 540 541 for(i = 0; i < BFE_RX_LIST_CNT; i++) { 542 if(bfe_list_newbuf(sc, i, NULL) == ENOBUFS) 543 return ENOBUFS; 544 } 545 546 bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map, BUS_DMASYNC_PREREAD); 547 CSR_WRITE_4(sc, BFE_DMARX_PTR, (i * sizeof(struct bfe_desc))); 548 549 sc->bfe_rx_cons = 0; 550 551 return(0); 552 } 553 554 static int 555 bfe_list_newbuf(struct bfe_softc *sc, int c, struct mbuf *m) 556 { 557 struct bfe_rxheader *rx_header; 558 struct bfe_desc *d; 559 struct bfe_data *r; 560 u_int32_t ctrl; 561 562 if ((c < 0) || (c >= BFE_RX_LIST_CNT)) 563 return(EINVAL); 564 565 if(m == NULL) { 566 m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 567 if(m == NULL) 568 return(ENOBUFS); 569 m->m_len = m->m_pkthdr.len = MCLBYTES; 570 } 571 else 572 m->m_data = m->m_ext.ext_buf; 573 574 rx_header = mtod(m, struct bfe_rxheader *); 575 rx_header->len = 0; 576 rx_header->flags = 0; 577 578 /* Map the mbuf into DMA */ 579 sc->bfe_rx_cnt = c; 580 d = &sc->bfe_rx_list[c]; 581 r = &sc->bfe_rx_ring[c]; 582 bus_dmamap_load(sc->bfe_tag, r->bfe_map, mtod(m, void *), 583 MCLBYTES, bfe_dma_map_desc, d, 0); 584 bus_dmamap_sync(sc->bfe_tag, r->bfe_map, BUS_DMASYNC_PREWRITE); 585 586 ctrl = ETHER_MAX_LEN + 32; 587 588 if(c == BFE_RX_LIST_CNT - 1) 589 ctrl |= BFE_DESC_EOT; 590 591 d->bfe_ctrl = ctrl; 592 r->bfe_mbuf = m; 593 bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map, BUS_DMASYNC_PREREAD); 594 return(0); 595 } 596 597 static void 598 bfe_get_config(struct bfe_softc *sc) 599 { 600 u_int8_t eeprom[128]; 601 602 bfe_read_eeprom(sc, eeprom); 603 604 sc->arpcom.ac_enaddr[0] = eeprom[79]; 605 sc->arpcom.ac_enaddr[1] = eeprom[78]; 606 sc->arpcom.ac_enaddr[2] = eeprom[81]; 607 sc->arpcom.ac_enaddr[3] = eeprom[80]; 608 sc->arpcom.ac_enaddr[4] = eeprom[83]; 609 sc->arpcom.ac_enaddr[5] = eeprom[82]; 610 611 sc->bfe_phyaddr = eeprom[90] & 0x1f; 612 sc->bfe_mdc_port = (eeprom[90] >> 14) & 0x1; 613 614 sc->bfe_core_unit = 0; 615 sc->bfe_dma_offset = BFE_PCI_DMA; 616 } 617 618 static void 619 bfe_pci_setup(struct bfe_softc *sc, u_int32_t cores) 620 { 621 u_int32_t bar_orig, pci_rev, val; 622 623 bar_orig = pci_read_config(sc->bfe_dev, BFE_BAR0_WIN, 4); 624 pci_write_config(sc->bfe_dev, BFE_BAR0_WIN, BFE_REG_PCI, 4); 625 pci_rev = CSR_READ_4(sc, BFE_SBIDHIGH) & BFE_RC_MASK; 626 627 val = CSR_READ_4(sc, BFE_SBINTVEC); 628 val |= cores; 629 CSR_WRITE_4(sc, BFE_SBINTVEC, val); 630 631 val = CSR_READ_4(sc, BFE_SSB_PCI_TRANS_2); 632 val |= BFE_SSB_PCI_PREF | BFE_SSB_PCI_BURST; 633 CSR_WRITE_4(sc, BFE_SSB_PCI_TRANS_2, val); 634 635 pci_write_config(sc->bfe_dev, BFE_BAR0_WIN, bar_orig, 4); 636 } 637 638 static void 639 bfe_clear_stats(struct bfe_softc *sc) 640 { 641 u_long reg; 642 643 BFE_LOCK(sc); 644 645 CSR_WRITE_4(sc, BFE_MIB_CTRL, BFE_MIB_CLR_ON_READ); 646 for (reg = BFE_TX_GOOD_O; reg <= BFE_TX_PAUSE; reg += 4) 647 CSR_READ_4(sc, reg); 648 for (reg = BFE_RX_GOOD_O; reg <= BFE_RX_NPAUSE; reg += 4) 649 CSR_READ_4(sc, reg); 650 651 BFE_UNLOCK(sc); 652 } 653 654 static int 655 bfe_resetphy(struct bfe_softc *sc) 656 { 657 u_int32_t val; 658 659 BFE_LOCK(sc); 660 bfe_writephy(sc, 0, BMCR_RESET); 661 DELAY(100); 662 bfe_readphy(sc, 0, &val); 663 if (val & BMCR_RESET) { 664 printf("bfe%d: PHY Reset would not complete.\n", sc->bfe_unit); 665 BFE_UNLOCK(sc); 666 return ENXIO; 667 } 668 BFE_UNLOCK(sc); 669 return 0; 670 } 671 672 static void 673 bfe_chip_halt(struct bfe_softc *sc) 674 { 675 BFE_LOCK(sc); 676 /* disable interrupts - not that it actually does..*/ 677 CSR_WRITE_4(sc, BFE_IMASK, 0); 678 CSR_READ_4(sc, BFE_IMASK); 679 680 CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE); 681 bfe_wait_bit(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE, 200, 1); 682 683 CSR_WRITE_4(sc, BFE_DMARX_CTRL, 0); 684 CSR_WRITE_4(sc, BFE_DMATX_CTRL, 0); 685 DELAY(10); 686 687 BFE_UNLOCK(sc); 688 } 689 690 static void 691 bfe_chip_reset(struct bfe_softc *sc) 692 { 693 u_int32_t val; 694 695 BFE_LOCK(sc); 696 697 /* Set the interrupt vector for the enet core */ 698 bfe_pci_setup(sc, BFE_INTVEC_ENET0); 699 700 /* is core up? */ 701 val = CSR_READ_4(sc, BFE_SBTMSLOW) & (BFE_RESET | BFE_REJECT | BFE_CLOCK); 702 if (val == BFE_CLOCK) { 703 /* It is, so shut it down */ 704 CSR_WRITE_4(sc, BFE_RCV_LAZY, 0); 705 CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE); 706 bfe_wait_bit(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE, 100, 1); 707 CSR_WRITE_4(sc, BFE_DMATX_CTRL, 0); 708 sc->bfe_tx_cnt = sc->bfe_tx_prod = sc->bfe_tx_cons = 0; 709 if (CSR_READ_4(sc, BFE_DMARX_STAT) & BFE_STAT_EMASK) 710 bfe_wait_bit(sc, BFE_DMARX_STAT, BFE_STAT_SIDLE, 100, 0); 711 CSR_WRITE_4(sc, BFE_DMARX_CTRL, 0); 712 sc->bfe_rx_prod = sc->bfe_rx_cons = 0; 713 } 714 715 bfe_core_reset(sc); 716 bfe_clear_stats(sc); 717 718 /* 719 * We want the phy registers to be accessible even when 720 * the driver is "downed" so initialize MDC preamble, frequency, 721 * and whether internal or external phy here. 722 */ 723 724 /* 4402 has 62.5Mhz SB clock and internal phy */ 725 CSR_WRITE_4(sc, BFE_MDIO_CTRL, 0x8d); 726 727 /* Internal or external PHY? */ 728 val = CSR_READ_4(sc, BFE_DEVCTRL); 729 if(!(val & BFE_IPP)) 730 CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_EPSEL); 731 else if(CSR_READ_4(sc, BFE_DEVCTRL) & BFE_EPR) { 732 BFE_AND(sc, BFE_DEVCTRL, ~BFE_EPR); 733 DELAY(100); 734 } 735 736 BFE_OR(sc, BFE_MAC_CTRL, BFE_CTRL_CRC32_ENAB); 737 CSR_WRITE_4(sc, BFE_RCV_LAZY, ((1 << BFE_LAZY_FC_SHIFT) & 738 BFE_LAZY_FC_MASK)); 739 740 /* 741 * We don't want lazy interrupts, so just send them at the end of a frame, 742 * please 743 */ 744 BFE_OR(sc, BFE_RCV_LAZY, 0); 745 746 /* Set max lengths, accounting for VLAN tags */ 747 CSR_WRITE_4(sc, BFE_RXMAXLEN, ETHER_MAX_LEN+32); 748 CSR_WRITE_4(sc, BFE_TXMAXLEN, ETHER_MAX_LEN+32); 749 750 /* Set watermark XXX - magic */ 751 CSR_WRITE_4(sc, BFE_TX_WMARK, 56); 752 753 /* 754 * Initialise DMA channels - not forgetting dma addresses need to be added 755 * to BFE_PCI_DMA 756 */ 757 CSR_WRITE_4(sc, BFE_DMATX_CTRL, BFE_TX_CTRL_ENABLE); 758 CSR_WRITE_4(sc, BFE_DMATX_ADDR, sc->bfe_tx_dma + BFE_PCI_DMA); 759 760 CSR_WRITE_4(sc, BFE_DMARX_CTRL, (BFE_RX_OFFSET << BFE_RX_CTRL_ROSHIFT) | 761 BFE_RX_CTRL_ENABLE); 762 CSR_WRITE_4(sc, BFE_DMARX_ADDR, sc->bfe_rx_dma + BFE_PCI_DMA); 763 764 bfe_resetphy(sc); 765 bfe_setupphy(sc); 766 767 BFE_UNLOCK(sc); 768 } 769 770 static void 771 bfe_core_disable(struct bfe_softc *sc) 772 { 773 if((CSR_READ_4(sc, BFE_SBTMSLOW)) & BFE_RESET) 774 return; 775 776 /* 777 * Set reject, wait for it set, then wait for the core to stop being busy 778 * Then set reset and reject and enable the clocks 779 */ 780 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_REJECT | BFE_CLOCK)); 781 bfe_wait_bit(sc, BFE_SBTMSLOW, BFE_REJECT, 1000, 0); 782 bfe_wait_bit(sc, BFE_SBTMSHIGH, BFE_BUSY, 1000, 1); 783 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_FGC | BFE_CLOCK | BFE_REJECT | 784 BFE_RESET)); 785 CSR_READ_4(sc, BFE_SBTMSLOW); 786 DELAY(10); 787 /* Leave reset and reject set */ 788 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_REJECT | BFE_RESET)); 789 DELAY(10); 790 } 791 792 static void 793 bfe_core_reset(struct bfe_softc *sc) 794 { 795 u_int32_t val; 796 797 /* Disable the core */ 798 bfe_core_disable(sc); 799 800 /* and bring it back up */ 801 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_RESET | BFE_CLOCK | BFE_FGC)); 802 CSR_READ_4(sc, BFE_SBTMSLOW); 803 DELAY(10); 804 805 /* Chip bug, clear SERR, IB and TO if they are set. */ 806 if (CSR_READ_4(sc, BFE_SBTMSHIGH) & BFE_SERR) 807 CSR_WRITE_4(sc, BFE_SBTMSHIGH, 0); 808 val = CSR_READ_4(sc, BFE_SBIMSTATE); 809 if (val & (BFE_IBE | BFE_TO)) 810 CSR_WRITE_4(sc, BFE_SBIMSTATE, val & ~(BFE_IBE | BFE_TO)); 811 812 /* Clear reset and allow it to move through the core */ 813 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_CLOCK | BFE_FGC)); 814 CSR_READ_4(sc, BFE_SBTMSLOW); 815 DELAY(10); 816 817 /* Leave the clock set */ 818 CSR_WRITE_4(sc, BFE_SBTMSLOW, BFE_CLOCK); 819 CSR_READ_4(sc, BFE_SBTMSLOW); 820 DELAY(10); 821 } 822 823 static void 824 bfe_cam_write(struct bfe_softc *sc, u_char *data, int index) 825 { 826 u_int32_t val; 827 828 val = ((u_int32_t) data[2]) << 24; 829 val |= ((u_int32_t) data[3]) << 16; 830 val |= ((u_int32_t) data[4]) << 8; 831 val |= ((u_int32_t) data[5]); 832 CSR_WRITE_4(sc, BFE_CAM_DATA_LO, val); 833 val = (BFE_CAM_HI_VALID | 834 (((u_int32_t) data[0]) << 8) | 835 (((u_int32_t) data[1]))); 836 CSR_WRITE_4(sc, BFE_CAM_DATA_HI, val); 837 CSR_WRITE_4(sc, BFE_CAM_CTRL, (BFE_CAM_WRITE | 838 (index << BFE_CAM_INDEX_SHIFT))); 839 bfe_wait_bit(sc, BFE_CAM_CTRL, BFE_CAM_BUSY, 10000, 1); 840 } 841 842 static void 843 bfe_set_rx_mode(struct bfe_softc *sc) 844 { 845 struct ifnet *ifp = &sc->arpcom.ac_if; 846 struct ifmultiaddr *ifma; 847 u_int32_t val; 848 int i = 0; 849 850 val = CSR_READ_4(sc, BFE_RXCONF); 851 852 if (ifp->if_flags & IFF_PROMISC) 853 val |= BFE_RXCONF_PROMISC; 854 else 855 val &= ~BFE_RXCONF_PROMISC; 856 857 if (ifp->if_flags & IFF_BROADCAST) 858 val &= ~BFE_RXCONF_DBCAST; 859 else 860 val |= BFE_RXCONF_DBCAST; 861 862 863 CSR_WRITE_4(sc, BFE_CAM_CTRL, 0); 864 bfe_cam_write(sc, sc->arpcom.ac_enaddr, i++); 865 866 if (ifp->if_flags & IFF_ALLMULTI) 867 val |= BFE_RXCONF_ALLMULTI; 868 else { 869 val &= ~BFE_RXCONF_ALLMULTI; 870 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 871 if (ifma->ifma_addr->sa_family != AF_LINK) 872 continue; 873 bfe_cam_write(sc, LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 874 i++); 875 } 876 } 877 878 CSR_WRITE_4(sc, BFE_RXCONF, val); 879 BFE_OR(sc, BFE_CAM_CTRL, BFE_CAM_ENABLE); 880 } 881 882 static void 883 bfe_dma_map(void *arg, bus_dma_segment_t *segs, int nseg, int error) 884 { 885 u_int32_t *ptr; 886 887 ptr = arg; 888 *ptr = segs->ds_addr; 889 } 890 891 static void 892 bfe_dma_map_desc(void *arg, bus_dma_segment_t *segs, int nseg, int error) 893 { 894 struct bfe_desc *d; 895 896 d = arg; 897 /* The chip needs all addresses to be added to BFE_PCI_DMA */ 898 d->bfe_addr = segs->ds_addr + BFE_PCI_DMA; 899 } 900 901 static void 902 bfe_release_resources(struct bfe_softc *sc) 903 { 904 device_t dev; 905 int i; 906 907 dev = sc->bfe_dev; 908 909 if (sc->bfe_vpd_prodname != NULL) 910 free(sc->bfe_vpd_prodname, M_DEVBUF); 911 912 if (sc->bfe_vpd_readonly != NULL) 913 free(sc->bfe_vpd_readonly, M_DEVBUF); 914 915 if (sc->bfe_intrhand != NULL) 916 bus_teardown_intr(dev, sc->bfe_irq, sc->bfe_intrhand); 917 918 if (sc->bfe_irq != NULL) 919 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->bfe_irq); 920 921 if (sc->bfe_res != NULL) 922 bus_release_resource(dev, SYS_RES_MEMORY, 0x10, sc->bfe_res); 923 924 if(sc->bfe_tx_tag != NULL) { 925 bus_dmamap_unload(sc->bfe_tx_tag, sc->bfe_tx_map); 926 bus_dmamem_free(sc->bfe_tx_tag, sc->bfe_tx_list, sc->bfe_tx_map); 927 bus_dma_tag_destroy(sc->bfe_tx_tag); 928 sc->bfe_tx_tag = NULL; 929 } 930 931 if(sc->bfe_rx_tag != NULL) { 932 bus_dmamap_unload(sc->bfe_rx_tag, sc->bfe_rx_map); 933 bus_dmamem_free(sc->bfe_rx_tag, sc->bfe_rx_list, sc->bfe_rx_map); 934 bus_dma_tag_destroy(sc->bfe_rx_tag); 935 sc->bfe_rx_tag = NULL; 936 } 937 938 if(sc->bfe_tag != NULL) { 939 for(i = 0; i < BFE_TX_LIST_CNT; i++) { 940 bus_dmamap_destroy(sc->bfe_tag, sc->bfe_tx_ring[i].bfe_map); 941 } 942 bus_dma_tag_destroy(sc->bfe_tag); 943 sc->bfe_tag = NULL; 944 } 945 946 if(sc->bfe_parent_tag != NULL) 947 bus_dma_tag_destroy(sc->bfe_parent_tag); 948 949 return; 950 } 951 952 static void 953 bfe_read_eeprom(struct bfe_softc *sc, u_int8_t *data) 954 { 955 long i; 956 u_int16_t *ptr = (u_int16_t *)data; 957 958 for(i = 0; i < 128; i += 2) 959 ptr[i/2] = CSR_READ_4(sc, 4096 + i); 960 } 961 962 static int 963 bfe_wait_bit(struct bfe_softc *sc, u_int32_t reg, u_int32_t bit, 964 u_long timeout, const int clear) 965 { 966 u_long i; 967 968 for (i = 0; i < timeout; i++) { 969 u_int32_t val = CSR_READ_4(sc, reg); 970 971 if (clear && !(val & bit)) 972 break; 973 if (!clear && (val & bit)) 974 break; 975 DELAY(10); 976 } 977 if (i == timeout) { 978 printf("bfe%d: BUG! Timeout waiting for bit %08x of register " 979 "%x to %s.\n", sc->bfe_unit, bit, reg, 980 (clear ? "clear" : "set")); 981 return -1; 982 } 983 return 0; 984 } 985 986 static int 987 bfe_readphy(struct bfe_softc *sc, u_int32_t reg, u_int32_t *val) 988 { 989 int err; 990 991 BFE_LOCK(sc); 992 /* Clear MII ISR */ 993 CSR_WRITE_4(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII); 994 CSR_WRITE_4(sc, BFE_MDIO_DATA, (BFE_MDIO_SB_START | 995 (BFE_MDIO_OP_READ << BFE_MDIO_OP_SHIFT) | 996 (sc->bfe_phyaddr << BFE_MDIO_PMD_SHIFT) | 997 (reg << BFE_MDIO_RA_SHIFT) | 998 (BFE_MDIO_TA_VALID << BFE_MDIO_TA_SHIFT))); 999 err = bfe_wait_bit(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII, 100, 0); 1000 *val = CSR_READ_4(sc, BFE_MDIO_DATA) & BFE_MDIO_DATA_DATA; 1001 1002 BFE_UNLOCK(sc); 1003 return err; 1004 } 1005 1006 static int 1007 bfe_writephy(struct bfe_softc *sc, u_int32_t reg, u_int32_t val) 1008 { 1009 int status; 1010 1011 BFE_LOCK(sc); 1012 CSR_WRITE_4(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII); 1013 CSR_WRITE_4(sc, BFE_MDIO_DATA, (BFE_MDIO_SB_START | 1014 (BFE_MDIO_OP_WRITE << BFE_MDIO_OP_SHIFT) | 1015 (sc->bfe_phyaddr << BFE_MDIO_PMD_SHIFT) | 1016 (reg << BFE_MDIO_RA_SHIFT) | 1017 (BFE_MDIO_TA_VALID << BFE_MDIO_TA_SHIFT) | 1018 (val & BFE_MDIO_DATA_DATA))); 1019 status = bfe_wait_bit(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII, 100, 0); 1020 BFE_UNLOCK(sc); 1021 1022 return status; 1023 } 1024 1025 /* 1026 * XXX - I think this is handled by the PHY driver, but it can't hurt to do it 1027 * twice 1028 */ 1029 static int 1030 bfe_setupphy(struct bfe_softc *sc) 1031 { 1032 u_int32_t val; 1033 BFE_LOCK(sc); 1034 1035 /* Enable activity LED */ 1036 bfe_readphy(sc, 26, &val); 1037 bfe_writephy(sc, 26, val & 0x7fff); 1038 bfe_readphy(sc, 26, &val); 1039 1040 /* Enable traffic meter LED mode */ 1041 bfe_readphy(sc, 27, &val); 1042 bfe_writephy(sc, 27, val | (1 << 6)); 1043 1044 BFE_UNLOCK(sc); 1045 return 0; 1046 } 1047 1048 static void 1049 bfe_stats_update(struct bfe_softc *sc) 1050 { 1051 u_long reg; 1052 u_int32_t *val; 1053 1054 val = &sc->bfe_hwstats.tx_good_octets; 1055 for (reg = BFE_TX_GOOD_O; reg <= BFE_TX_PAUSE; reg += 4) { 1056 *val++ += CSR_READ_4(sc, reg); 1057 } 1058 val = &sc->bfe_hwstats.rx_good_octets; 1059 for (reg = BFE_RX_GOOD_O; reg <= BFE_RX_NPAUSE; reg += 4) { 1060 *val++ += CSR_READ_4(sc, reg); 1061 } 1062 } 1063 1064 static void 1065 bfe_txeof(struct bfe_softc *sc) 1066 { 1067 struct ifnet *ifp; 1068 int i, chipidx; 1069 1070 BFE_LOCK(sc); 1071 1072 ifp = &sc->arpcom.ac_if; 1073 1074 chipidx = CSR_READ_4(sc, BFE_DMATX_STAT) & BFE_STAT_CDMASK; 1075 chipidx /= sizeof(struct bfe_desc); 1076 1077 i = sc->bfe_tx_cons; 1078 /* Go through the mbufs and free those that have been transmitted */ 1079 while(i != chipidx) { 1080 struct bfe_data *r = &sc->bfe_tx_ring[i]; 1081 if(r->bfe_mbuf != NULL) { 1082 ifp->if_opackets++; 1083 m_freem(r->bfe_mbuf); 1084 r->bfe_mbuf = NULL; 1085 bus_dmamap_unload(sc->bfe_tag, r->bfe_map); 1086 } 1087 sc->bfe_tx_cnt--; 1088 BFE_INC(i, BFE_TX_LIST_CNT); 1089 } 1090 1091 if(i != sc->bfe_tx_cons) { 1092 /* we freed up some mbufs */ 1093 sc->bfe_tx_cons = i; 1094 ifp->if_flags &= ~IFF_OACTIVE; 1095 } 1096 if(sc->bfe_tx_cnt == 0) 1097 ifp->if_timer = 0; 1098 else 1099 ifp->if_timer = 5; 1100 1101 BFE_UNLOCK(sc); 1102 } 1103 1104 /* Pass a received packet up the stack */ 1105 static void 1106 bfe_rxeof(struct bfe_softc *sc) 1107 { 1108 struct mbuf *m; 1109 struct ifnet *ifp; 1110 struct bfe_rxheader *rxheader; 1111 struct bfe_data *r; 1112 int cons; 1113 u_int32_t status, current, len, flags; 1114 1115 BFE_LOCK(sc); 1116 cons = sc->bfe_rx_cons; 1117 status = CSR_READ_4(sc, BFE_DMARX_STAT); 1118 current = (status & BFE_STAT_CDMASK) / sizeof(struct bfe_desc); 1119 1120 ifp = &sc->arpcom.ac_if; 1121 1122 while(current != cons) { 1123 r = &sc->bfe_rx_ring[cons]; 1124 m = r->bfe_mbuf; 1125 rxheader = mtod(m, struct bfe_rxheader*); 1126 bus_dmamap_sync(sc->bfe_tag, r->bfe_map, BUS_DMASYNC_POSTWRITE); 1127 len = rxheader->len; 1128 r->bfe_mbuf = NULL; 1129 1130 bus_dmamap_unload(sc->bfe_tag, r->bfe_map); 1131 flags = rxheader->flags; 1132 1133 len -= ETHER_CRC_LEN; 1134 1135 /* flag an error and try again */ 1136 if ((len > ETHER_MAX_LEN+32) || (flags & BFE_RX_FLAG_ERRORS)) { 1137 ifp->if_ierrors++; 1138 if (flags & BFE_RX_FLAG_SERR) 1139 ifp->if_collisions++; 1140 bfe_list_newbuf(sc, cons, m); 1141 continue; 1142 } 1143 1144 /* Go past the rx header */ 1145 if (bfe_list_newbuf(sc, cons, NULL) == 0) { 1146 m_adj(m, BFE_RX_OFFSET); 1147 m->m_len = m->m_pkthdr.len = len; 1148 } else { 1149 bfe_list_newbuf(sc, cons, m); 1150 ifp->if_ierrors++; 1151 continue; 1152 } 1153 1154 ifp->if_ipackets++; 1155 m->m_pkthdr.rcvif = ifp; 1156 BFE_UNLOCK(sc); 1157 (*ifp->if_input)(ifp, m); 1158 BFE_LOCK(sc); 1159 1160 BFE_INC(cons, BFE_RX_LIST_CNT); 1161 } 1162 sc->bfe_rx_cons = cons; 1163 BFE_UNLOCK(sc); 1164 } 1165 1166 static void 1167 bfe_intr(void *xsc) 1168 { 1169 struct bfe_softc *sc = xsc; 1170 struct ifnet *ifp; 1171 u_int32_t istat, imask, flag; 1172 1173 ifp = &sc->arpcom.ac_if; 1174 1175 BFE_LOCK(sc); 1176 1177 istat = CSR_READ_4(sc, BFE_ISTAT); 1178 imask = CSR_READ_4(sc, BFE_IMASK); 1179 1180 /* 1181 * Defer unsolicited interrupts - This is necessary because setting the 1182 * chips interrupt mask register to 0 doesn't actually stop the 1183 * interrupts 1184 */ 1185 istat &= imask; 1186 CSR_WRITE_4(sc, BFE_ISTAT, istat); 1187 CSR_READ_4(sc, BFE_ISTAT); 1188 1189 /* not expecting this interrupt, disregard it */ 1190 if(istat == 0) { 1191 BFE_UNLOCK(sc); 1192 return; 1193 } 1194 1195 if(istat & BFE_ISTAT_ERRORS) { 1196 flag = CSR_READ_4(sc, BFE_DMATX_STAT); 1197 if(flag & BFE_STAT_EMASK) 1198 ifp->if_oerrors++; 1199 1200 flag = CSR_READ_4(sc, BFE_DMARX_STAT); 1201 if(flag & BFE_RX_FLAG_ERRORS) 1202 ifp->if_ierrors++; 1203 1204 ifp->if_flags &= ~IFF_RUNNING; 1205 bfe_init(sc); 1206 } 1207 1208 /* A packet was received */ 1209 if(istat & BFE_ISTAT_RX) 1210 bfe_rxeof(sc); 1211 1212 /* A packet was sent */ 1213 if(istat & BFE_ISTAT_TX) 1214 bfe_txeof(sc); 1215 1216 /* We have packets pending, fire them out */ 1217 if (ifp->if_flags & IFF_RUNNING && ifp->if_snd.ifq_head != NULL) 1218 bfe_start(ifp); 1219 1220 BFE_UNLOCK(sc); 1221 } 1222 1223 static int 1224 bfe_encap(struct bfe_softc *sc, struct mbuf *m_head, u_int32_t *txidx) 1225 { 1226 struct bfe_desc *d = NULL; 1227 struct bfe_data *r = NULL; 1228 struct mbuf *m; 1229 u_int32_t frag, cur, cnt = 0; 1230 int chainlen = 0; 1231 1232 if(BFE_TX_LIST_CNT - sc->bfe_tx_cnt < 2) 1233 return(ENOBUFS); 1234 1235 /* 1236 * Count the number of frags in this chain to see if 1237 * we need to m_defrag. Since the descriptor list is shared 1238 * by all packets, we'll m_defrag long chains so that they 1239 * do not use up the entire list, even if they would fit. 1240 */ 1241 for(m = m_head; m != NULL; m = m->m_next) 1242 chainlen++; 1243 1244 1245 if ((chainlen > BFE_TX_LIST_CNT / 4) || 1246 ((BFE_TX_LIST_CNT - (chainlen + sc->bfe_tx_cnt)) < 2)) { 1247 m = m_defrag(m_head, M_DONTWAIT); 1248 if (m == NULL) 1249 return(ENOBUFS); 1250 m_head = m; 1251 } 1252 1253 /* 1254 * Start packing the mbufs in this chain into 1255 * the fragment pointers. Stop when we run out 1256 * of fragments or hit the end of the mbuf chain. 1257 */ 1258 m = m_head; 1259 cur = frag = *txidx; 1260 cnt = 0; 1261 1262 for(m = m_head; m != NULL; m = m->m_next) { 1263 if(m->m_len != 0) { 1264 if((BFE_TX_LIST_CNT - (sc->bfe_tx_cnt + cnt)) < 2) 1265 return(ENOBUFS); 1266 1267 d = &sc->bfe_tx_list[cur]; 1268 r = &sc->bfe_tx_ring[cur]; 1269 d->bfe_ctrl = BFE_DESC_LEN & m->m_len; 1270 /* always intterupt on completion */ 1271 d->bfe_ctrl |= BFE_DESC_IOC; 1272 if(cnt == 0) 1273 /* Set start of frame */ 1274 d->bfe_ctrl |= BFE_DESC_SOF; 1275 if(cur == BFE_TX_LIST_CNT - 1) 1276 /* Tell the chip to wrap to the start of the descriptor list */ 1277 d->bfe_ctrl |= BFE_DESC_EOT; 1278 1279 bus_dmamap_load(sc->bfe_tag, r->bfe_map, mtod(m, void*), m->m_len, 1280 bfe_dma_map_desc, d, 0); 1281 bus_dmamap_sync(sc->bfe_tag, r->bfe_map, BUS_DMASYNC_PREREAD); 1282 1283 frag = cur; 1284 BFE_INC(cur, BFE_TX_LIST_CNT); 1285 cnt++; 1286 } 1287 } 1288 1289 if (m != NULL) 1290 return(ENOBUFS); 1291 1292 sc->bfe_tx_list[frag].bfe_ctrl |= BFE_DESC_EOF; 1293 sc->bfe_tx_ring[frag].bfe_mbuf = m_head; 1294 bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map, BUS_DMASYNC_PREREAD); 1295 1296 *txidx = cur; 1297 sc->bfe_tx_cnt += cnt; 1298 return (0); 1299 } 1300 1301 /* 1302 * Set up to transmit a packet 1303 */ 1304 static void 1305 bfe_start(struct ifnet *ifp) 1306 { 1307 struct bfe_softc *sc; 1308 struct mbuf *m_head = NULL; 1309 int idx; 1310 1311 sc = ifp->if_softc; 1312 idx = sc->bfe_tx_prod; 1313 1314 BFE_LOCK(sc); 1315 1316 /* 1317 * not much point trying to send if the link is down or we have nothing to 1318 * send 1319 */ 1320 if (!sc->bfe_link && ifp->if_snd.ifq_len < 10) { 1321 BFE_UNLOCK(sc); 1322 return; 1323 } 1324 1325 if (ifp->if_flags & IFF_OACTIVE) { 1326 BFE_UNLOCK(sc); 1327 return; 1328 } 1329 1330 while(sc->bfe_tx_ring[idx].bfe_mbuf == NULL) { 1331 IF_DEQUEUE(&ifp->if_snd, m_head); 1332 if(m_head == NULL) 1333 break; 1334 1335 /* 1336 * Pack the data into the tx ring. If we dont have enough room, let 1337 * the chip drain the ring 1338 */ 1339 if(bfe_encap(sc, m_head, &idx)) { 1340 IF_PREPEND(&ifp->if_snd, m_head); 1341 ifp->if_flags |= IFF_OACTIVE; 1342 break; 1343 } 1344 1345 /* 1346 * If there's a BPF listener, bounce a copy of this frame 1347 * to him. 1348 */ 1349 BPF_MTAP(ifp, m_head); 1350 } 1351 1352 sc->bfe_tx_prod = idx; 1353 /* Transmit - twice due to apparent hardware bug */ 1354 CSR_WRITE_4(sc, BFE_DMATX_PTR, idx * sizeof(struct bfe_desc)); 1355 CSR_WRITE_4(sc, BFE_DMATX_PTR, idx * sizeof(struct bfe_desc)); 1356 1357 /* 1358 * Set a timeout in case the chip goes out to lunch. 1359 */ 1360 ifp->if_timer = 5; 1361 BFE_UNLOCK(sc); 1362 } 1363 1364 static void 1365 bfe_init(void *xsc) 1366 { 1367 struct bfe_softc *sc = (struct bfe_softc*)xsc; 1368 struct ifnet *ifp = &sc->arpcom.ac_if; 1369 1370 BFE_LOCK(sc); 1371 1372 if (ifp->if_flags & IFF_RUNNING) { 1373 BFE_UNLOCK(sc); 1374 return; 1375 } 1376 1377 bfe_stop(sc); 1378 bfe_chip_reset(sc); 1379 1380 if (bfe_list_rx_init(sc) == ENOBUFS) { 1381 printf("bfe%d: bfe_init failed. Not enough memory for list buffers\n", 1382 sc->bfe_unit); 1383 bfe_stop(sc); 1384 return; 1385 } 1386 1387 bfe_set_rx_mode(sc); 1388 1389 /* Enable the chip and core */ 1390 BFE_OR(sc, BFE_ENET_CTRL, BFE_ENET_ENABLE); 1391 /* Enable interrupts */ 1392 CSR_WRITE_4(sc, BFE_IMASK, BFE_IMASK_DEF); 1393 1394 bfe_ifmedia_upd(ifp); 1395 ifp->if_flags |= IFF_RUNNING; 1396 ifp->if_flags &= ~IFF_OACTIVE; 1397 1398 sc->bfe_stat_ch = timeout(bfe_tick, sc, hz); 1399 BFE_UNLOCK(sc); 1400 } 1401 1402 /* 1403 * Set media options. 1404 */ 1405 static int 1406 bfe_ifmedia_upd(struct ifnet *ifp) 1407 { 1408 struct bfe_softc *sc; 1409 struct mii_data *mii; 1410 1411 sc = ifp->if_softc; 1412 1413 BFE_LOCK(sc); 1414 1415 mii = device_get_softc(sc->bfe_miibus); 1416 sc->bfe_link = 0; 1417 if (mii->mii_instance) { 1418 struct mii_softc *miisc; 1419 for (miisc = LIST_FIRST(&mii->mii_phys); miisc != NULL; 1420 miisc = LIST_NEXT(miisc, mii_list)) 1421 mii_phy_reset(miisc); 1422 } 1423 mii_mediachg(mii); 1424 1425 BFE_UNLOCK(sc); 1426 return(0); 1427 } 1428 1429 /* 1430 * Report current media status. 1431 */ 1432 static void 1433 bfe_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 1434 { 1435 struct bfe_softc *sc = ifp->if_softc; 1436 struct mii_data *mii; 1437 1438 BFE_LOCK(sc); 1439 1440 mii = device_get_softc(sc->bfe_miibus); 1441 mii_pollstat(mii); 1442 ifmr->ifm_active = mii->mii_media_active; 1443 ifmr->ifm_status = mii->mii_media_status; 1444 1445 BFE_UNLOCK(sc); 1446 } 1447 1448 static int 1449 bfe_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 1450 { 1451 struct bfe_softc *sc = ifp->if_softc; 1452 struct ifreq *ifr = (struct ifreq *) data; 1453 struct mii_data *mii; 1454 int error = 0; 1455 1456 BFE_LOCK(sc); 1457 1458 switch(command) { 1459 case SIOCSIFFLAGS: 1460 if(ifp->if_flags & IFF_UP) 1461 if(ifp->if_flags & IFF_RUNNING) 1462 bfe_set_rx_mode(sc); 1463 else 1464 bfe_init(sc); 1465 else if(ifp->if_flags & IFF_RUNNING) 1466 bfe_stop(sc); 1467 break; 1468 case SIOCADDMULTI: 1469 case SIOCDELMULTI: 1470 if(ifp->if_flags & IFF_RUNNING) 1471 bfe_set_rx_mode(sc); 1472 break; 1473 case SIOCGIFMEDIA: 1474 case SIOCSIFMEDIA: 1475 mii = device_get_softc(sc->bfe_miibus); 1476 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 1477 break; 1478 default: 1479 error = ether_ioctl(ifp, command, data); 1480 break; 1481 } 1482 1483 BFE_UNLOCK(sc); 1484 return error; 1485 } 1486 1487 static void 1488 bfe_watchdog(struct ifnet *ifp) 1489 { 1490 struct bfe_softc *sc; 1491 1492 sc = ifp->if_softc; 1493 1494 BFE_LOCK(sc); 1495 1496 printf("bfe%d: watchdog timeout -- resetting\n", sc->bfe_unit); 1497 1498 ifp->if_flags &= ~IFF_RUNNING; 1499 bfe_init(sc); 1500 1501 ifp->if_oerrors++; 1502 1503 BFE_UNLOCK(sc); 1504 } 1505 1506 static void 1507 bfe_tick(void *xsc) 1508 { 1509 struct bfe_softc *sc = xsc; 1510 struct mii_data *mii; 1511 1512 if (sc == NULL) 1513 return; 1514 1515 BFE_LOCK(sc); 1516 1517 mii = device_get_softc(sc->bfe_miibus); 1518 1519 bfe_stats_update(sc); 1520 sc->bfe_stat_ch = timeout(bfe_tick, sc, hz); 1521 1522 if(sc->bfe_link) { 1523 BFE_UNLOCK(sc); 1524 return; 1525 } 1526 1527 mii_tick(mii); 1528 if (!sc->bfe_link && mii->mii_media_status & IFM_ACTIVE && 1529 IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) 1530 sc->bfe_link++; 1531 1532 BFE_UNLOCK(sc); 1533 } 1534 1535 /* 1536 * Stop the adapter and free any mbufs allocated to the 1537 * RX and TX lists. 1538 */ 1539 static void 1540 bfe_stop(struct bfe_softc *sc) 1541 { 1542 struct ifnet *ifp; 1543 1544 BFE_LOCK(sc); 1545 1546 untimeout(bfe_tick, sc, sc->bfe_stat_ch); 1547 1548 ifp = &sc->arpcom.ac_if; 1549 1550 bfe_chip_halt(sc); 1551 bfe_tx_ring_free(sc); 1552 bfe_rx_ring_free(sc); 1553 1554 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1555 1556 BFE_UNLOCK(sc); 1557 }
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