Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/netif/bfe/if_bfe.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* 2 * Copyright (c) 2003 Stuart Walsh<stu@ipng.org.uk> 3 * and Duncan Barclay<dmlb@dmlb.org> 4 * Modifications for FreeBSD-stable by Edwin Groothuis 5 * <edwin at mavetju.org 6 * < http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>> 7 */ 8 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 AUTHOR AND CONTRIBUTORS 'AS IS' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: src/sys/dev/bfe/if_bfe.c 1.4.4.7 2004/03/02 08:41:33 julian Exp v 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/sockio.h> 37 #include <sys/mbuf.h> 38 #include <sys/malloc.h> 39 #include <sys/interrupt.h> 40 #include <sys/kernel.h> 41 #include <sys/socket.h> 42 #include <sys/queue.h> 43 #include <sys/bus.h> 44 #include <sys/rman.h> 45 #include <sys/thread2.h> 46 47 #include <net/if.h> 48 #include <net/ifq_var.h> 49 #include <net/if_arp.h> 50 #include <net/ethernet.h> 51 #include <net/if_dl.h> 52 #include <net/if_media.h> 53 54 #include <net/bpf.h> 55 56 #include <net/if_types.h> 57 #include <net/vlan/if_vlan_var.h> 58 59 #include <netinet/in_systm.h> 60 #include <netinet/in.h> 61 #include <netinet/ip.h> 62 63 #include <bus/pci/pcireg.h> 64 #include <bus/pci/pcivar.h> 65 #include "pcidevs.h" 66 67 #include <dev/netif/mii_layer/mii.h> 68 #include <dev/netif/mii_layer/miivar.h> 69 70 #include <dev/netif/bfe/if_bfereg.h> 71 72 MODULE_DEPEND(bfe, pci, 1, 1, 1); 73 MODULE_DEPEND(bfe, miibus, 1, 1, 1); 74 75 /* "controller miibus0" required. See GENERIC if you get errors here. */ 76 #include "miibus_if.h" 77 78 #define BFE_DEVDESC_MAX 64 /* Maximum device description length */ 79 80 static struct bfe_type bfe_devs[] = { 81 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4401, 82 "Broadcom BCM4401 Fast Ethernet" }, 83 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4401B0, 84 "Broadcom BCM4401-B0 Fast Ethernet" }, 85 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4402, 86 "Broadcom BCM4402 Fast Ethernet" }, 87 { 0, 0, NULL } 88 }; 89 90 static int bfe_probe(device_t); 91 static int bfe_attach(device_t); 92 static int bfe_detach(device_t); 93 static void bfe_intr(void *); 94 static void bfe_start(struct ifnet *, struct ifaltq_subque *); 95 static int bfe_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *); 96 static void bfe_init(void *); 97 static void bfe_stop(struct bfe_softc *); 98 static void bfe_watchdog(struct ifnet *); 99 static void bfe_shutdown(device_t); 100 static void bfe_tick(void *); 101 static void bfe_txeof(struct bfe_softc *); 102 static void bfe_rxeof(struct bfe_softc *); 103 static void bfe_set_rx_mode(struct bfe_softc *); 104 static int bfe_list_rx_init(struct bfe_softc *); 105 static int bfe_newbuf(struct bfe_softc *, int, int); 106 static void bfe_setup_rxdesc(struct bfe_softc *, int); 107 static void bfe_rx_ring_free(struct bfe_softc *); 108 109 static void bfe_pci_setup(struct bfe_softc *, uint32_t); 110 static int bfe_ifmedia_upd(struct ifnet *); 111 static void bfe_ifmedia_sts(struct ifnet *, struct ifmediareq *); 112 static int bfe_miibus_readreg(device_t, int, int); 113 static int bfe_miibus_writereg(device_t, int, int, int); 114 static int bfe_wait_bit(struct bfe_softc *, uint32_t, uint32_t, 115 u_long, const int); 116 static void bfe_get_config(struct bfe_softc *sc); 117 static void bfe_read_eeprom(struct bfe_softc *, uint8_t *); 118 static void bfe_stats_update(struct bfe_softc *); 119 static void bfe_clear_stats (struct bfe_softc *); 120 static int bfe_readphy(struct bfe_softc *, uint32_t, uint32_t*); 121 static int bfe_writephy(struct bfe_softc *, uint32_t, uint32_t); 122 static int bfe_resetphy(struct bfe_softc *); 123 static int bfe_setupphy(struct bfe_softc *); 124 static void bfe_chip_reset(struct bfe_softc *); 125 static void bfe_chip_halt(struct bfe_softc *); 126 static void bfe_core_reset(struct bfe_softc *); 127 static void bfe_core_disable(struct bfe_softc *); 128 static int bfe_dma_alloc(device_t); 129 static void bfe_dma_free(struct bfe_softc *); 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), 146 147 DEVMETHOD_END 148 }; 149 150 static driver_t bfe_driver = { 151 "bfe", 152 bfe_methods, 153 sizeof(struct bfe_softc) 154 }; 155 156 static devclass_t bfe_devclass; 157 158 DRIVER_MODULE(bfe, pci, bfe_driver, bfe_devclass, NULL, NULL); 159 DRIVER_MODULE(miibus, bfe, miibus_driver, miibus_devclass, NULL, NULL); 160 161 /* 162 * Probe for a Broadcom 4401 chip. 163 */ 164 static int 165 bfe_probe(device_t dev) 166 { 167 struct bfe_type *t; 168 uint16_t vendor, product; 169 170 vendor = pci_get_vendor(dev); 171 product = pci_get_device(dev); 172 173 for (t = bfe_devs; t->bfe_name != NULL; t++) { 174 if (vendor == t->bfe_vid && product == t->bfe_did) { 175 device_set_desc(dev, t->bfe_name); 176 return(0); 177 } 178 } 179 180 return(ENXIO); 181 } 182 183 static int 184 bfe_dma_alloc(device_t dev) 185 { 186 struct bfe_softc *sc = device_get_softc(dev); 187 bus_dmamem_t dmem; 188 int error, i, tx_pos = 0, rx_pos = 0; 189 190 /* 191 * Parent tag. Apparently the chip cannot handle any DMA address 192 * greater than BFE_BUS_SPACE_MAXADDR (1GB). 193 */ 194 error = bus_dma_tag_create(NULL, /* parent */ 195 1, 0, /* alignment, boundary */ 196 BFE_BUS_SPACE_MAXADDR, /* lowaddr */ 197 BUS_SPACE_MAXADDR, /* highaddr */ 198 NULL, NULL, /* filter, filterarg */ 199 BUS_SPACE_MAXSIZE_32BIT, /* maxsize */ 200 0, /* num of segments */ 201 BUS_SPACE_MAXSIZE_32BIT, /* max segment size */ 202 0, /* flags */ 203 &sc->bfe_parent_tag); 204 if (error) { 205 device_printf(dev, "could not allocate parent dma tag\n"); 206 return(error); 207 } 208 209 /* Allocate TX ring */ 210 error = bus_dmamem_coherent(sc->bfe_parent_tag, PAGE_SIZE, 0, 211 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, 212 BFE_TX_LIST_SIZE, 213 BUS_DMA_WAITOK | BUS_DMA_ZERO, &dmem); 214 if (error) { 215 device_printf(dev, "could not allocate TX list\n"); 216 return(error); 217 } 218 sc->bfe_tx_tag = dmem.dmem_tag; 219 sc->bfe_tx_map = dmem.dmem_map; 220 sc->bfe_tx_list = dmem.dmem_addr; 221 sc->bfe_tx_dma = dmem.dmem_busaddr; 222 223 /* Allocate RX ring */ 224 error = bus_dmamem_coherent(sc->bfe_parent_tag, PAGE_SIZE, 0, 225 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, 226 BFE_RX_LIST_SIZE, 227 BUS_DMA_WAITOK | BUS_DMA_ZERO, &dmem); 228 if (error) { 229 device_printf(dev, "could not allocate RX list\n"); 230 return(error); 231 } 232 sc->bfe_rx_tag = dmem.dmem_tag; 233 sc->bfe_rx_map = dmem.dmem_map; 234 sc->bfe_rx_list = dmem.dmem_addr; 235 sc->bfe_rx_dma = dmem.dmem_busaddr; 236 237 /* Tag for RX mbufs */ 238 error = bus_dma_tag_create(sc->bfe_parent_tag, 1, 0, 239 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, 240 NULL, NULL, 241 MCLBYTES, 1, MCLBYTES, 242 BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK, 243 &sc->bfe_rxbuf_tag); 244 if (error) { 245 device_printf(dev, "could not allocate dma tag for RX mbufs\n"); 246 return(error); 247 } 248 249 error = bus_dmamap_create(sc->bfe_rxbuf_tag, BUS_DMA_WAITOK, 250 &sc->bfe_rx_tmpmap); 251 if (error) { 252 device_printf(dev, "could not create RX mbuf tmp map\n"); 253 bus_dma_tag_destroy(sc->bfe_rxbuf_tag); 254 sc->bfe_rxbuf_tag = NULL; 255 return error; 256 } 257 258 /* Allocate dma maps for RX list */ 259 for (i = 0; i < BFE_RX_LIST_CNT; i++) { 260 error = bus_dmamap_create(sc->bfe_rxbuf_tag, BUS_DMA_WAITOK, 261 &sc->bfe_rx_ring[i].bfe_map); 262 if (error) { 263 rx_pos = i; 264 device_printf(dev, "cannot create DMA map for RX\n"); 265 goto ring_fail; 266 } 267 } 268 rx_pos = BFE_RX_LIST_CNT; 269 270 /* Tag for TX mbufs */ 271 error = bus_dma_tag_create(sc->bfe_parent_tag, 1, 0, 272 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, 273 NULL, NULL, 274 MCLBYTES, BFE_MAXSEGS, MCLBYTES, 275 BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK, 276 &sc->bfe_txbuf_tag); 277 if (error) { 278 device_printf(dev, "could not allocate dma tag for TX mbufs\n"); 279 return(error); 280 } 281 282 /* Allocate dmamaps for TX list */ 283 for (i = 0; i < BFE_TX_LIST_CNT; i++) { 284 error = bus_dmamap_create(sc->bfe_txbuf_tag, BUS_DMA_WAITOK, 285 &sc->bfe_tx_ring[i].bfe_map); 286 if (error) { 287 tx_pos = i; 288 device_printf(dev, "cannot create DMA map for TX\n"); 289 goto ring_fail; 290 } 291 } 292 293 return(0); 294 295 ring_fail: 296 if (sc->bfe_rxbuf_tag != NULL) { 297 for (i = 0; i < rx_pos; ++i) { 298 bus_dmamap_destroy(sc->bfe_rxbuf_tag, 299 sc->bfe_rx_ring[i].bfe_map); 300 } 301 bus_dmamap_destroy(sc->bfe_rxbuf_tag, sc->bfe_rx_tmpmap); 302 bus_dma_tag_destroy(sc->bfe_rxbuf_tag); 303 sc->bfe_rxbuf_tag = NULL; 304 } 305 306 if (sc->bfe_txbuf_tag != NULL) { 307 for (i = 0; i < tx_pos; ++i) { 308 bus_dmamap_destroy(sc->bfe_txbuf_tag, 309 sc->bfe_tx_ring[i].bfe_map); 310 } 311 bus_dma_tag_destroy(sc->bfe_txbuf_tag); 312 sc->bfe_txbuf_tag = NULL; 313 } 314 return error; 315 } 316 317 static int 318 bfe_attach(device_t dev) 319 { 320 struct ifnet *ifp; 321 struct bfe_softc *sc; 322 int error = 0, rid; 323 324 sc = device_get_softc(dev); 325 326 sc->bfe_dev = dev; 327 callout_init(&sc->bfe_stat_timer); 328 329 #ifndef BURN_BRIDGES 330 /* 331 * Handle power management nonsense. 332 */ 333 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 334 uint32_t membase, irq; 335 336 /* Save important PCI config data. */ 337 membase = pci_read_config(dev, BFE_PCI_MEMLO, 4); 338 irq = pci_read_config(dev, BFE_PCI_INTLINE, 4); 339 340 /* Reset the power state. */ 341 device_printf(dev, "chip is in D%d power mode" 342 " -- setting to D0\n", pci_get_powerstate(dev)); 343 344 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 345 346 /* Restore PCI config data. */ 347 pci_write_config(dev, BFE_PCI_MEMLO, membase, 4); 348 pci_write_config(dev, BFE_PCI_INTLINE, irq, 4); 349 } 350 #endif /* !BURN_BRIDGE */ 351 352 /* 353 * Map control/status registers. 354 */ 355 pci_enable_busmaster(dev); 356 357 rid = BFE_PCI_MEMLO; 358 sc->bfe_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 359 RF_ACTIVE); 360 if (sc->bfe_res == NULL) { 361 device_printf(dev, "couldn't map memory\n"); 362 return ENXIO; 363 } 364 365 sc->bfe_btag = rman_get_bustag(sc->bfe_res); 366 sc->bfe_bhandle = rman_get_bushandle(sc->bfe_res); 367 368 /* Allocate interrupt */ 369 rid = 0; 370 371 sc->bfe_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 372 RF_SHAREABLE | RF_ACTIVE); 373 if (sc->bfe_irq == NULL) { 374 device_printf(dev, "couldn't map interrupt\n"); 375 error = ENXIO; 376 goto fail; 377 } 378 379 error = bfe_dma_alloc(dev); 380 if (error != 0) { 381 device_printf(dev, "failed to allocate DMA resources\n"); 382 goto fail; 383 } 384 385 /* Set up ifnet structure */ 386 ifp = &sc->arpcom.ac_if; 387 ifp->if_softc = sc; 388 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 389 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 390 ifp->if_ioctl = bfe_ioctl; 391 ifp->if_start = bfe_start; 392 ifp->if_watchdog = bfe_watchdog; 393 ifp->if_init = bfe_init; 394 ifp->if_mtu = ETHERMTU; 395 ifp->if_baudrate = 100000000; 396 ifp->if_capabilities |= IFCAP_VLAN_MTU; 397 ifp->if_capenable |= IFCAP_VLAN_MTU; 398 ifp->if_hdrlen = sizeof(struct ether_vlan_header); 399 ifq_set_maxlen(&ifp->if_snd, BFE_TX_QLEN); 400 ifq_set_ready(&ifp->if_snd); 401 402 bfe_get_config(sc); 403 404 /* Reset the chip and turn on the PHY */ 405 bfe_chip_reset(sc); 406 407 if (mii_phy_probe(dev, &sc->bfe_miibus, 408 bfe_ifmedia_upd, bfe_ifmedia_sts)) { 409 device_printf(dev, "MII without any PHY!\n"); 410 error = ENXIO; 411 goto fail; 412 } 413 414 ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL); 415 416 ifq_set_cpuid(&ifp->if_snd, rman_get_cpuid(sc->bfe_irq)); 417 418 /* 419 * Hook interrupt last to avoid having to lock softc 420 */ 421 error = bus_setup_intr(dev, sc->bfe_irq, INTR_MPSAFE, 422 bfe_intr, sc, &sc->bfe_intrhand, 423 sc->arpcom.ac_if.if_serializer); 424 425 if (error) { 426 ether_ifdetach(ifp); 427 device_printf(dev, "couldn't set up irq\n"); 428 goto fail; 429 } 430 return 0; 431 fail: 432 bfe_detach(dev); 433 return(error); 434 } 435 436 static int 437 bfe_detach(device_t dev) 438 { 439 struct bfe_softc *sc = device_get_softc(dev); 440 struct ifnet *ifp = &sc->arpcom.ac_if; 441 442 if (device_is_attached(dev)) { 443 lwkt_serialize_enter(ifp->if_serializer); 444 bfe_stop(sc); 445 bfe_chip_reset(sc); 446 bus_teardown_intr(dev, sc->bfe_irq, sc->bfe_intrhand); 447 lwkt_serialize_exit(ifp->if_serializer); 448 449 ether_ifdetach(ifp); 450 } 451 if (sc->bfe_miibus != NULL) 452 device_delete_child(dev, sc->bfe_miibus); 453 bus_generic_detach(dev); 454 455 if (sc->bfe_irq != NULL) 456 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->bfe_irq); 457 458 if (sc->bfe_res != NULL) { 459 bus_release_resource(dev, SYS_RES_MEMORY, BFE_PCI_MEMLO, 460 sc->bfe_res); 461 } 462 bfe_dma_free(sc); 463 464 return(0); 465 } 466 467 /* 468 * Stop all chip I/O so that the kernel's probe routines don't 469 * get confused by errant DMAs when rebooting. 470 */ 471 static void 472 bfe_shutdown(device_t dev) 473 { 474 struct bfe_softc *sc = device_get_softc(dev); 475 struct ifnet *ifp = &sc->arpcom.ac_if; 476 477 lwkt_serialize_enter(ifp->if_serializer); 478 bfe_stop(sc); 479 lwkt_serialize_exit(ifp->if_serializer); 480 } 481 482 static int 483 bfe_miibus_readreg(device_t dev, int phy, int reg) 484 { 485 struct bfe_softc *sc; 486 uint32_t ret; 487 488 sc = device_get_softc(dev); 489 if (phy != sc->bfe_phyaddr) 490 return(0); 491 bfe_readphy(sc, reg, &ret); 492 493 return(ret); 494 } 495 496 static int 497 bfe_miibus_writereg(device_t dev, int phy, int reg, int val) 498 { 499 struct bfe_softc *sc; 500 501 sc = device_get_softc(dev); 502 if (phy != sc->bfe_phyaddr) 503 return(0); 504 bfe_writephy(sc, reg, val); 505 506 return(0); 507 } 508 509 static void 510 bfe_tx_ring_free(struct bfe_softc *sc) 511 { 512 int i; 513 514 for (i = 0; i < BFE_TX_LIST_CNT; i++) { 515 if (sc->bfe_tx_ring[i].bfe_mbuf != NULL) { 516 bus_dmamap_unload(sc->bfe_txbuf_tag, 517 sc->bfe_tx_ring[i].bfe_map); 518 m_freem(sc->bfe_tx_ring[i].bfe_mbuf); 519 sc->bfe_tx_ring[i].bfe_mbuf = NULL; 520 } 521 } 522 bzero(sc->bfe_tx_list, BFE_TX_LIST_SIZE); 523 } 524 525 static void 526 bfe_rx_ring_free(struct bfe_softc *sc) 527 { 528 int i; 529 530 for (i = 0; i < BFE_RX_LIST_CNT; i++) { 531 if (sc->bfe_rx_ring[i].bfe_mbuf != NULL) { 532 bus_dmamap_unload(sc->bfe_rxbuf_tag, 533 sc->bfe_rx_ring[i].bfe_map); 534 m_freem(sc->bfe_rx_ring[i].bfe_mbuf); 535 sc->bfe_rx_ring[i].bfe_mbuf = NULL; 536 } 537 } 538 bzero(sc->bfe_rx_list, BFE_RX_LIST_SIZE); 539 } 540 541 static int 542 bfe_list_rx_init(struct bfe_softc *sc) 543 { 544 int i, error; 545 546 for (i = 0; i < BFE_RX_LIST_CNT; i++) { 547 error = bfe_newbuf(sc, i, 1); 548 if (error) 549 return(error); 550 } 551 552 CSR_WRITE_4(sc, BFE_DMARX_PTR, (i * sizeof(struct bfe_desc))); 553 554 sc->bfe_rx_cons = 0; 555 556 return(0); 557 } 558 559 static int 560 bfe_newbuf(struct bfe_softc *sc, int c, int init) 561 { 562 struct bfe_data *r; 563 bus_dmamap_t map; 564 bus_dma_segment_t seg; 565 struct mbuf *m; 566 int error, nsegs; 567 568 m = m_getcl(init ? MB_WAIT : MB_DONTWAIT, MT_DATA, M_PKTHDR); 569 if (m == NULL) 570 return ENOBUFS; 571 m->m_len = m->m_pkthdr.len = MCLBYTES; 572 573 error = bus_dmamap_load_mbuf_segment(sc->bfe_rxbuf_tag, 574 sc->bfe_rx_tmpmap, m, 575 &seg, 1, &nsegs, BUS_DMA_NOWAIT); 576 if (error) { 577 m_freem(m); 578 if (init) 579 if_printf(&sc->arpcom.ac_if, "can't load RX mbuf\n"); 580 return error; 581 } 582 583 KKASSERT(c >= 0 && c < BFE_RX_LIST_CNT); 584 r = &sc->bfe_rx_ring[c]; 585 586 if (r->bfe_mbuf != NULL) 587 bus_dmamap_unload(sc->bfe_rxbuf_tag, r->bfe_map); 588 589 map = r->bfe_map; 590 r->bfe_map = sc->bfe_rx_tmpmap; 591 sc->bfe_rx_tmpmap = map; 592 593 r->bfe_mbuf = m; 594 r->bfe_paddr = seg.ds_addr; 595 596 bfe_setup_rxdesc(sc, c); 597 return 0; 598 } 599 600 static void 601 bfe_setup_rxdesc(struct bfe_softc *sc, int c) 602 { 603 struct bfe_rxheader *rx_header; 604 struct mbuf *m; 605 struct bfe_desc *d; 606 struct bfe_data *r; 607 uint32_t ctrl; 608 609 KKASSERT(c >= 0 && c < BFE_RX_LIST_CNT); 610 r = &sc->bfe_rx_ring[c]; 611 d = &sc->bfe_rx_list[c]; 612 613 KKASSERT(r->bfe_mbuf != NULL && r->bfe_paddr != 0); 614 615 m = r->bfe_mbuf; 616 rx_header = mtod(m, struct bfe_rxheader *); 617 rx_header->len = 0; 618 rx_header->flags = 0; 619 bus_dmamap_sync(sc->bfe_rxbuf_tag, r->bfe_map, BUS_DMASYNC_PREWRITE); 620 621 ctrl = ETHER_MAX_LEN + 32; 622 if (c == BFE_RX_LIST_CNT - 1) 623 ctrl |= BFE_DESC_EOT; 624 625 d->bfe_addr = r->bfe_paddr + BFE_PCI_DMA; 626 d->bfe_ctrl = ctrl; 627 } 628 629 static void 630 bfe_get_config(struct bfe_softc *sc) 631 { 632 uint8_t eeprom[128]; 633 634 bfe_read_eeprom(sc, eeprom); 635 636 sc->arpcom.ac_enaddr[0] = eeprom[79]; 637 sc->arpcom.ac_enaddr[1] = eeprom[78]; 638 sc->arpcom.ac_enaddr[2] = eeprom[81]; 639 sc->arpcom.ac_enaddr[3] = eeprom[80]; 640 sc->arpcom.ac_enaddr[4] = eeprom[83]; 641 sc->arpcom.ac_enaddr[5] = eeprom[82]; 642 643 sc->bfe_phyaddr = eeprom[90] & 0x1f; 644 sc->bfe_mdc_port = (eeprom[90] >> 14) & 0x1; 645 646 sc->bfe_core_unit = 0; 647 sc->bfe_dma_offset = BFE_PCI_DMA; 648 } 649 650 static void 651 bfe_pci_setup(struct bfe_softc *sc, uint32_t cores) 652 { 653 uint32_t bar_orig, val; 654 655 bar_orig = pci_read_config(sc->bfe_dev, BFE_BAR0_WIN, 4); 656 pci_write_config(sc->bfe_dev, BFE_BAR0_WIN, BFE_REG_PCI, 4); 657 658 val = CSR_READ_4(sc, BFE_SBINTVEC); 659 val |= cores; 660 CSR_WRITE_4(sc, BFE_SBINTVEC, val); 661 662 val = CSR_READ_4(sc, BFE_SSB_PCI_TRANS_2); 663 val |= BFE_SSB_PCI_PREF | BFE_SSB_PCI_BURST; 664 CSR_WRITE_4(sc, BFE_SSB_PCI_TRANS_2, val); 665 666 pci_write_config(sc->bfe_dev, BFE_BAR0_WIN, bar_orig, 4); 667 } 668 669 static void 670 bfe_clear_stats(struct bfe_softc *sc) 671 { 672 u_long reg; 673 674 CSR_WRITE_4(sc, BFE_MIB_CTRL, BFE_MIB_CLR_ON_READ); 675 for (reg = BFE_TX_GOOD_O; reg <= BFE_TX_PAUSE; reg += 4) 676 CSR_READ_4(sc, reg); 677 for (reg = BFE_RX_GOOD_O; reg <= BFE_RX_NPAUSE; reg += 4) 678 CSR_READ_4(sc, reg); 679 } 680 681 static int 682 bfe_resetphy(struct bfe_softc *sc) 683 { 684 uint32_t val; 685 686 bfe_writephy(sc, 0, BMCR_RESET); 687 DELAY(100); 688 bfe_readphy(sc, 0, &val); 689 if (val & BMCR_RESET) { 690 if_printf(&sc->arpcom.ac_if, 691 "PHY Reset would not complete.\n"); 692 return(ENXIO); 693 } 694 return(0); 695 } 696 697 static void 698 bfe_chip_halt(struct bfe_softc *sc) 699 { 700 /* disable interrupts - not that it actually does..*/ 701 CSR_WRITE_4(sc, BFE_IMASK, 0); 702 CSR_READ_4(sc, BFE_IMASK); 703 704 CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE); 705 bfe_wait_bit(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE, 200, 1); 706 707 CSR_WRITE_4(sc, BFE_DMARX_CTRL, 0); 708 CSR_WRITE_4(sc, BFE_DMATX_CTRL, 0); 709 DELAY(10); 710 } 711 712 static void 713 bfe_chip_reset(struct bfe_softc *sc) 714 { 715 uint32_t val; 716 717 /* Set the interrupt vector for the enet core */ 718 bfe_pci_setup(sc, BFE_INTVEC_ENET0); 719 720 /* is core up? */ 721 val = CSR_READ_4(sc, BFE_SBTMSLOW) & (BFE_RESET | BFE_REJECT | BFE_CLOCK); 722 if (val == BFE_CLOCK) { 723 /* It is, so shut it down */ 724 CSR_WRITE_4(sc, BFE_RCV_LAZY, 0); 725 CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE); 726 bfe_wait_bit(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE, 100, 1); 727 CSR_WRITE_4(sc, BFE_DMATX_CTRL, 0); 728 sc->bfe_tx_cnt = sc->bfe_tx_prod = sc->bfe_tx_cons = 0; 729 if (CSR_READ_4(sc, BFE_DMARX_STAT) & BFE_STAT_EMASK) 730 bfe_wait_bit(sc, BFE_DMARX_STAT, BFE_STAT_SIDLE, 100, 0); 731 CSR_WRITE_4(sc, BFE_DMARX_CTRL, 0); 732 sc->bfe_rx_cons = 0; 733 } 734 735 bfe_core_reset(sc); 736 bfe_clear_stats(sc); 737 738 /* 739 * We want the phy registers to be accessible even when 740 * the driver is "downed" so initialize MDC preamble, frequency, 741 * and whether internal or external phy here. 742 */ 743 744 /* 4402 has 62.5Mhz SB clock and internal phy */ 745 CSR_WRITE_4(sc, BFE_MDIO_CTRL, 0x8d); 746 747 /* Internal or external PHY? */ 748 val = CSR_READ_4(sc, BFE_DEVCTRL); 749 if (!(val & BFE_IPP)) 750 CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_EPSEL); 751 else if (CSR_READ_4(sc, BFE_DEVCTRL) & BFE_EPR) { 752 BFE_AND(sc, BFE_DEVCTRL, ~BFE_EPR); 753 DELAY(100); 754 } 755 756 /* Enable CRC32 generation and set proper LED modes */ 757 BFE_OR(sc, BFE_MAC_CTRL, BFE_CTRL_CRC32_ENAB | BFE_CTRL_LED); 758 759 /* Reset or clear powerdown control bit */ 760 BFE_AND(sc, BFE_MAC_CTRL, ~BFE_CTRL_PDOWN); 761 762 CSR_WRITE_4(sc, BFE_RCV_LAZY, ((1 << BFE_LAZY_FC_SHIFT) & 763 BFE_LAZY_FC_MASK)); 764 765 /* 766 * We don't want lazy interrupts, so just send them at the end of a 767 * frame, please 768 */ 769 BFE_OR(sc, BFE_RCV_LAZY, 0); 770 771 /* Set max lengths, accounting for VLAN tags */ 772 CSR_WRITE_4(sc, BFE_RXMAXLEN, ETHER_MAX_LEN+32); 773 CSR_WRITE_4(sc, BFE_TXMAXLEN, ETHER_MAX_LEN+32); 774 775 /* Set watermark XXX - magic */ 776 CSR_WRITE_4(sc, BFE_TX_WMARK, 56); 777 778 /* 779 * Initialise DMA channels - not forgetting dma addresses need to be 780 * added to BFE_PCI_DMA 781 */ 782 CSR_WRITE_4(sc, BFE_DMATX_CTRL, BFE_TX_CTRL_ENABLE); 783 CSR_WRITE_4(sc, BFE_DMATX_ADDR, sc->bfe_tx_dma + BFE_PCI_DMA); 784 785 CSR_WRITE_4(sc, BFE_DMARX_CTRL, (BFE_RX_OFFSET << BFE_RX_CTRL_ROSHIFT) | 786 BFE_RX_CTRL_ENABLE); 787 CSR_WRITE_4(sc, BFE_DMARX_ADDR, sc->bfe_rx_dma + BFE_PCI_DMA); 788 789 bfe_resetphy(sc); 790 bfe_setupphy(sc); 791 } 792 793 static void 794 bfe_core_disable(struct bfe_softc *sc) 795 { 796 if ((CSR_READ_4(sc, BFE_SBTMSLOW)) & BFE_RESET) 797 return; 798 799 /* 800 * Set reject, wait for it set, then wait for the core to stop being busy 801 * Then set reset and reject and enable the clocks 802 */ 803 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_REJECT | BFE_CLOCK)); 804 bfe_wait_bit(sc, BFE_SBTMSLOW, BFE_REJECT, 1000, 0); 805 bfe_wait_bit(sc, BFE_SBTMSHIGH, BFE_BUSY, 1000, 1); 806 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_FGC | BFE_CLOCK | BFE_REJECT | 807 BFE_RESET)); 808 CSR_READ_4(sc, BFE_SBTMSLOW); 809 DELAY(10); 810 /* Leave reset and reject set */ 811 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_REJECT | BFE_RESET)); 812 DELAY(10); 813 } 814 815 static void 816 bfe_core_reset(struct bfe_softc *sc) 817 { 818 uint32_t val; 819 820 /* Disable the core */ 821 bfe_core_disable(sc); 822 823 /* and bring it back up */ 824 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_RESET | BFE_CLOCK | BFE_FGC)); 825 CSR_READ_4(sc, BFE_SBTMSLOW); 826 DELAY(10); 827 828 /* Chip bug, clear SERR, IB and TO if they are set. */ 829 if (CSR_READ_4(sc, BFE_SBTMSHIGH) & BFE_SERR) 830 CSR_WRITE_4(sc, BFE_SBTMSHIGH, 0); 831 val = CSR_READ_4(sc, BFE_SBIMSTATE); 832 if (val & (BFE_IBE | BFE_TO)) 833 CSR_WRITE_4(sc, BFE_SBIMSTATE, val & ~(BFE_IBE | BFE_TO)); 834 835 /* Clear reset and allow it to move through the core */ 836 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_CLOCK | BFE_FGC)); 837 CSR_READ_4(sc, BFE_SBTMSLOW); 838 DELAY(10); 839 840 /* Leave the clock set */ 841 CSR_WRITE_4(sc, BFE_SBTMSLOW, BFE_CLOCK); 842 CSR_READ_4(sc, BFE_SBTMSLOW); 843 DELAY(10); 844 } 845 846 static void 847 bfe_cam_write(struct bfe_softc *sc, u_char *data, int index) 848 { 849 uint32_t val; 850 851 val = ((uint32_t) data[2]) << 24; 852 val |= ((uint32_t) data[3]) << 16; 853 val |= ((uint32_t) data[4]) << 8; 854 val |= ((uint32_t) data[5]); 855 CSR_WRITE_4(sc, BFE_CAM_DATA_LO, val); 856 val = (BFE_CAM_HI_VALID | 857 (((uint32_t) data[0]) << 8) | 858 (((uint32_t) data[1]))); 859 CSR_WRITE_4(sc, BFE_CAM_DATA_HI, val); 860 CSR_WRITE_4(sc, BFE_CAM_CTRL, (BFE_CAM_WRITE | 861 ((uint32_t)index << BFE_CAM_INDEX_SHIFT))); 862 bfe_wait_bit(sc, BFE_CAM_CTRL, BFE_CAM_BUSY, 10000, 1); 863 } 864 865 static void 866 bfe_set_rx_mode(struct bfe_softc *sc) 867 { 868 struct ifnet *ifp = &sc->arpcom.ac_if; 869 struct ifmultiaddr *ifma; 870 uint32_t val; 871 int i = 0; 872 873 val = CSR_READ_4(sc, BFE_RXCONF); 874 875 if (ifp->if_flags & IFF_PROMISC) 876 val |= BFE_RXCONF_PROMISC; 877 else 878 val &= ~BFE_RXCONF_PROMISC; 879 880 if (ifp->if_flags & IFF_BROADCAST) 881 val &= ~BFE_RXCONF_DBCAST; 882 else 883 val |= BFE_RXCONF_DBCAST; 884 885 886 CSR_WRITE_4(sc, BFE_CAM_CTRL, 0); 887 bfe_cam_write(sc, sc->arpcom.ac_enaddr, i++); 888 889 if (ifp->if_flags & IFF_ALLMULTI) { 890 val |= BFE_RXCONF_ALLMULTI; 891 } else { 892 val &= ~BFE_RXCONF_ALLMULTI; 893 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 894 if (ifma->ifma_addr->sa_family != AF_LINK) 895 continue; 896 bfe_cam_write(sc, 897 LLADDR((struct sockaddr_dl *)ifma->ifma_addr), i++); 898 } 899 } 900 901 CSR_WRITE_4(sc, BFE_RXCONF, val); 902 BFE_OR(sc, BFE_CAM_CTRL, BFE_CAM_ENABLE); 903 } 904 905 static void 906 bfe_dma_free(struct bfe_softc *sc) 907 { 908 int i; 909 910 if (sc->bfe_tx_tag != NULL) { 911 bus_dmamap_unload(sc->bfe_tx_tag, sc->bfe_tx_map); 912 if (sc->bfe_tx_list != NULL) { 913 bus_dmamem_free(sc->bfe_tx_tag, sc->bfe_tx_list, 914 sc->bfe_tx_map); 915 sc->bfe_tx_list = NULL; 916 } 917 bus_dma_tag_destroy(sc->bfe_tx_tag); 918 sc->bfe_tx_tag = NULL; 919 } 920 921 if (sc->bfe_rx_tag != NULL) { 922 bus_dmamap_unload(sc->bfe_rx_tag, sc->bfe_rx_map); 923 if (sc->bfe_rx_list != NULL) { 924 bus_dmamem_free(sc->bfe_rx_tag, sc->bfe_rx_list, 925 sc->bfe_rx_map); 926 sc->bfe_rx_list = NULL; 927 } 928 bus_dma_tag_destroy(sc->bfe_rx_tag); 929 sc->bfe_rx_tag = NULL; 930 } 931 932 if (sc->bfe_txbuf_tag != NULL) { 933 for (i = 0; i < BFE_TX_LIST_CNT; i++) { 934 bus_dmamap_destroy(sc->bfe_txbuf_tag, 935 sc->bfe_tx_ring[i].bfe_map); 936 } 937 bus_dma_tag_destroy(sc->bfe_txbuf_tag); 938 sc->bfe_txbuf_tag = NULL; 939 } 940 941 if (sc->bfe_rxbuf_tag != NULL) { 942 for (i = 0; i < BFE_RX_LIST_CNT; i++) { 943 bus_dmamap_destroy(sc->bfe_rxbuf_tag, 944 sc->bfe_rx_ring[i].bfe_map); 945 } 946 bus_dmamap_destroy(sc->bfe_rxbuf_tag, sc->bfe_rx_tmpmap); 947 bus_dma_tag_destroy(sc->bfe_rxbuf_tag); 948 sc->bfe_rxbuf_tag = NULL; 949 } 950 951 if (sc->bfe_parent_tag != NULL) { 952 bus_dma_tag_destroy(sc->bfe_parent_tag); 953 sc->bfe_parent_tag = NULL; 954 } 955 } 956 957 static void 958 bfe_read_eeprom(struct bfe_softc *sc, uint8_t *data) 959 { 960 long i; 961 uint16_t *ptr = (uint16_t *)data; 962 963 for (i = 0; i < 128; i += 2) 964 ptr[i/2] = CSR_READ_4(sc, 4096 + i); 965 } 966 967 static int 968 bfe_wait_bit(struct bfe_softc *sc, uint32_t reg, uint32_t bit, 969 u_long timeout, const int clear) 970 { 971 u_long i; 972 973 for (i = 0; i < timeout; i++) { 974 uint32_t val = CSR_READ_4(sc, reg); 975 976 if (clear && !(val & bit)) 977 break; 978 if (!clear && (val & bit)) 979 break; 980 DELAY(10); 981 } 982 if (i == timeout) { 983 if_printf(&sc->arpcom.ac_if, 984 "BUG! Timeout waiting for bit %08x of register " 985 "%x to %s.\n", bit, reg, 986 (clear ? "clear" : "set")); 987 return -1; 988 } 989 return 0; 990 } 991 992 static int 993 bfe_readphy(struct bfe_softc *sc, uint32_t reg, uint32_t *val) 994 { 995 int err; 996 997 /* Clear MII ISR */ 998 CSR_WRITE_4(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII); 999 CSR_WRITE_4(sc, BFE_MDIO_DATA, (BFE_MDIO_SB_START | 1000 (BFE_MDIO_OP_READ << BFE_MDIO_OP_SHIFT) | 1001 (sc->bfe_phyaddr << BFE_MDIO_PMD_SHIFT) | 1002 (reg << BFE_MDIO_RA_SHIFT) | 1003 (BFE_MDIO_TA_VALID << BFE_MDIO_TA_SHIFT))); 1004 err = bfe_wait_bit(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII, 100, 0); 1005 *val = CSR_READ_4(sc, BFE_MDIO_DATA) & BFE_MDIO_DATA_DATA; 1006 return(err); 1007 } 1008 1009 static int 1010 bfe_writephy(struct bfe_softc *sc, uint32_t reg, uint32_t val) 1011 { 1012 int status; 1013 1014 CSR_WRITE_4(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII); 1015 CSR_WRITE_4(sc, BFE_MDIO_DATA, (BFE_MDIO_SB_START | 1016 (BFE_MDIO_OP_WRITE << BFE_MDIO_OP_SHIFT) | 1017 (sc->bfe_phyaddr << BFE_MDIO_PMD_SHIFT) | 1018 (reg << BFE_MDIO_RA_SHIFT) | 1019 (BFE_MDIO_TA_VALID << BFE_MDIO_TA_SHIFT) | 1020 (val & BFE_MDIO_DATA_DATA))); 1021 status = bfe_wait_bit(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII, 100, 0); 1022 1023 return status; 1024 } 1025 1026 /* 1027 * XXX - I think this is handled by the PHY driver, but it can't hurt to do it 1028 * twice 1029 */ 1030 static int 1031 bfe_setupphy(struct bfe_softc *sc) 1032 { 1033 uint32_t val; 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 return(0); 1045 } 1046 1047 static void 1048 bfe_stats_update(struct bfe_softc *sc) 1049 { 1050 u_long reg; 1051 uint32_t *val; 1052 1053 val = &sc->bfe_hwstats.tx_good_octets; 1054 for (reg = BFE_TX_GOOD_O; reg <= BFE_TX_PAUSE; reg += 4) 1055 *val++ += CSR_READ_4(sc, reg); 1056 val = &sc->bfe_hwstats.rx_good_octets; 1057 for (reg = BFE_RX_GOOD_O; reg <= BFE_RX_NPAUSE; reg += 4) 1058 *val++ += CSR_READ_4(sc, reg); 1059 } 1060 1061 static void 1062 bfe_txeof(struct bfe_softc *sc) 1063 { 1064 struct ifnet *ifp = &sc->arpcom.ac_if; 1065 uint32_t i, chipidx; 1066 1067 chipidx = CSR_READ_4(sc, BFE_DMATX_STAT) & BFE_STAT_CDMASK; 1068 chipidx /= sizeof(struct bfe_desc); 1069 1070 i = sc->bfe_tx_cons; 1071 1072 /* Go through the mbufs and free those that have been transmitted */ 1073 while (i != chipidx) { 1074 struct bfe_data *r = &sc->bfe_tx_ring[i]; 1075 1076 if (r->bfe_mbuf != NULL) { 1077 IFNET_STAT_INC(ifp, opackets, 1); 1078 bus_dmamap_unload(sc->bfe_txbuf_tag, r->bfe_map); 1079 m_freem(r->bfe_mbuf); 1080 r->bfe_mbuf = NULL; 1081 } 1082 1083 KKASSERT(sc->bfe_tx_cnt > 0); 1084 sc->bfe_tx_cnt--; 1085 BFE_INC(i, BFE_TX_LIST_CNT); 1086 } 1087 1088 if (i != sc->bfe_tx_cons) { 1089 sc->bfe_tx_cons = i; 1090 1091 if (sc->bfe_tx_cnt + BFE_SPARE_TXDESC < BFE_TX_LIST_CNT) 1092 ifq_clr_oactive(&ifp->if_snd); 1093 } 1094 if (sc->bfe_tx_cnt == 0) 1095 ifp->if_timer = 0; 1096 } 1097 1098 /* Pass a received packet up the stack */ 1099 static void 1100 bfe_rxeof(struct bfe_softc *sc) 1101 { 1102 struct ifnet *ifp = &sc->arpcom.ac_if; 1103 struct mbuf *m; 1104 struct bfe_rxheader *rxheader; 1105 struct bfe_data *r; 1106 uint32_t cons, status, current, len, flags; 1107 1108 cons = sc->bfe_rx_cons; 1109 status = CSR_READ_4(sc, BFE_DMARX_STAT); 1110 current = (status & BFE_STAT_CDMASK) / sizeof(struct bfe_desc); 1111 1112 while (current != cons) { 1113 r = &sc->bfe_rx_ring[cons]; 1114 bus_dmamap_sync(sc->bfe_rxbuf_tag, r->bfe_map, 1115 BUS_DMASYNC_POSTREAD); 1116 1117 KKASSERT(r->bfe_mbuf != NULL); 1118 m = r->bfe_mbuf; 1119 rxheader = mtod(m, struct bfe_rxheader*); 1120 len = rxheader->len - ETHER_CRC_LEN; 1121 flags = rxheader->flags; 1122 1123 /* flag an error and try again */ 1124 if (len > ETHER_MAX_LEN + 32 || (flags & BFE_RX_FLAG_ERRORS)) { 1125 IFNET_STAT_INC(ifp, ierrors, 1); 1126 if (flags & BFE_RX_FLAG_SERR) 1127 IFNET_STAT_INC(ifp, collisions, 1); 1128 1129 bfe_setup_rxdesc(sc, cons); 1130 BFE_INC(cons, BFE_RX_LIST_CNT); 1131 continue; 1132 } 1133 1134 /* Go past the rx header */ 1135 if (bfe_newbuf(sc, cons, 0) != 0) { 1136 bfe_setup_rxdesc(sc, cons); 1137 IFNET_STAT_INC(ifp, ierrors, 1); 1138 BFE_INC(cons, BFE_RX_LIST_CNT); 1139 continue; 1140 } 1141 1142 m_adj(m, BFE_RX_OFFSET); 1143 m->m_len = m->m_pkthdr.len = len; 1144 1145 IFNET_STAT_INC(ifp, ipackets, 1); 1146 m->m_pkthdr.rcvif = ifp; 1147 1148 ifp->if_input(ifp, m); 1149 BFE_INC(cons, BFE_RX_LIST_CNT); 1150 } 1151 1152 sc->bfe_rx_cons = cons; 1153 } 1154 1155 static void 1156 bfe_intr(void *xsc) 1157 { 1158 struct bfe_softc *sc = xsc; 1159 struct ifnet *ifp = &sc->arpcom.ac_if; 1160 uint32_t istat, imask, flag; 1161 1162 istat = CSR_READ_4(sc, BFE_ISTAT); 1163 imask = CSR_READ_4(sc, BFE_IMASK); 1164 1165 /* 1166 * Defer unsolicited interrupts - This is necessary because setting the 1167 * chips interrupt mask register to 0 doesn't actually stop the 1168 * interrupts 1169 */ 1170 istat &= imask; 1171 CSR_WRITE_4(sc, BFE_ISTAT, istat); 1172 CSR_READ_4(sc, BFE_ISTAT); 1173 1174 /* not expecting this interrupt, disregard it */ 1175 if (istat == 0) { 1176 return; 1177 } 1178 1179 if (istat & BFE_ISTAT_ERRORS) { 1180 flag = CSR_READ_4(sc, BFE_DMATX_STAT); 1181 if (flag & BFE_STAT_EMASK) 1182 IFNET_STAT_INC(ifp, oerrors, 1); 1183 1184 flag = CSR_READ_4(sc, BFE_DMARX_STAT); 1185 if (flag & BFE_RX_FLAG_ERRORS) 1186 IFNET_STAT_INC(ifp, ierrors, 1); 1187 1188 ifp->if_flags &= ~IFF_RUNNING; 1189 bfe_init(sc); 1190 } 1191 1192 /* A packet was received */ 1193 if (istat & BFE_ISTAT_RX) 1194 bfe_rxeof(sc); 1195 1196 /* A packet was sent */ 1197 if (istat & BFE_ISTAT_TX) 1198 bfe_txeof(sc); 1199 1200 /* We have packets pending, fire them out */ 1201 if ((ifp->if_flags & IFF_RUNNING) && !ifq_is_empty(&ifp->if_snd)) 1202 if_devstart(ifp); 1203 } 1204 1205 static int 1206 bfe_encap(struct bfe_softc *sc, struct mbuf **m_head, uint32_t *txidx) 1207 { 1208 bus_dma_segment_t segs[BFE_MAXSEGS]; 1209 bus_dmamap_t map; 1210 int i, first_idx, last_idx, cur, error, maxsegs, nsegs; 1211 1212 KKASSERT(sc->bfe_tx_cnt + BFE_SPARE_TXDESC < BFE_TX_LIST_CNT); 1213 maxsegs = BFE_TX_LIST_CNT - sc->bfe_tx_cnt - BFE_SPARE_TXDESC; 1214 if (maxsegs > BFE_MAXSEGS) 1215 maxsegs = BFE_MAXSEGS; 1216 1217 first_idx = *txidx; 1218 map = sc->bfe_tx_ring[first_idx].bfe_map; 1219 1220 error = bus_dmamap_load_mbuf_defrag(sc->bfe_txbuf_tag, map, m_head, 1221 segs, maxsegs, &nsegs, BUS_DMA_NOWAIT); 1222 if (error) 1223 goto fail; 1224 bus_dmamap_sync(sc->bfe_txbuf_tag, map, BUS_DMASYNC_PREWRITE); 1225 1226 last_idx = -1; 1227 cur = first_idx; 1228 for (i = 0; i < nsegs; ++i) { 1229 struct bfe_desc *d; 1230 uint32_t ctrl; 1231 1232 ctrl = BFE_DESC_LEN & segs[i].ds_len; 1233 ctrl |= BFE_DESC_IOC; /* always interrupt */ 1234 if (cur == BFE_TX_LIST_CNT - 1) { 1235 /* 1236 * Tell the chip to wrap to the 1237 * start of the descriptor list. 1238 */ 1239 ctrl |= BFE_DESC_EOT; 1240 } 1241 1242 d = &sc->bfe_tx_list[cur]; 1243 d->bfe_addr = segs[i].ds_addr + BFE_PCI_DMA; 1244 d->bfe_ctrl = ctrl; 1245 1246 last_idx = cur; 1247 BFE_INC(cur, BFE_TX_LIST_CNT); 1248 } 1249 KKASSERT(last_idx >= 0); 1250 1251 /* End of the frame */ 1252 sc->bfe_tx_list[last_idx].bfe_ctrl |= BFE_DESC_EOF; 1253 1254 /* 1255 * Set start of the frame on the first fragment, 1256 * _after_ all of the fragments are setup. 1257 */ 1258 sc->bfe_tx_list[first_idx].bfe_ctrl |= BFE_DESC_SOF; 1259 1260 sc->bfe_tx_ring[first_idx].bfe_map = sc->bfe_tx_ring[last_idx].bfe_map; 1261 sc->bfe_tx_ring[last_idx].bfe_map = map; 1262 sc->bfe_tx_ring[last_idx].bfe_mbuf = *m_head; 1263 1264 *txidx = cur; 1265 sc->bfe_tx_cnt += nsegs; 1266 return 0; 1267 fail: 1268 m_freem(*m_head); 1269 *m_head = NULL; 1270 return error; 1271 } 1272 1273 /* 1274 * Set up to transmit a packet 1275 */ 1276 static void 1277 bfe_start(struct ifnet *ifp, struct ifaltq_subque *ifsq) 1278 { 1279 struct bfe_softc *sc = ifp->if_softc; 1280 struct mbuf *m_head = NULL; 1281 int idx, need_trans; 1282 1283 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq); 1284 ASSERT_SERIALIZED(ifp->if_serializer); 1285 1286 /* 1287 * Not much point trying to send if the link is down 1288 * or we have nothing to send. 1289 */ 1290 if (!sc->bfe_link) { 1291 ifq_purge(&ifp->if_snd); 1292 return; 1293 } 1294 1295 if (ifq_is_oactive(&ifp->if_snd)) 1296 return; 1297 1298 idx = sc->bfe_tx_prod; 1299 1300 need_trans = 0; 1301 while (!ifq_is_empty(&ifp->if_snd)) { 1302 if (sc->bfe_tx_cnt + BFE_SPARE_TXDESC >= BFE_TX_LIST_CNT) { 1303 ifq_set_oactive(&ifp->if_snd); 1304 break; 1305 } 1306 1307 m_head = ifq_dequeue(&ifp->if_snd); 1308 if (m_head == NULL) 1309 break; 1310 1311 /* 1312 * Pack the data into the tx ring. If we don't have 1313 * enough room, let the chip drain the ring. 1314 */ 1315 if (bfe_encap(sc, &m_head, &idx)) { 1316 /* m_head is freed by re_encap(), if we reach here */ 1317 IFNET_STAT_INC(ifp, oerrors, 1); 1318 1319 if (sc->bfe_tx_cnt > 0) { 1320 ifq_set_oactive(&ifp->if_snd); 1321 break; 1322 } else { 1323 /* 1324 * ifq_set_oactive could not be called under 1325 * this situation, since except up/down, 1326 * nothing will call ifq_clr_oactive. 1327 * 1328 * Let's just keep draining the ifq ... 1329 */ 1330 continue; 1331 } 1332 } 1333 need_trans = 1; 1334 1335 /* 1336 * If there's a BPF listener, bounce a copy of this frame 1337 * to him. 1338 */ 1339 BPF_MTAP(ifp, m_head); 1340 } 1341 1342 if (!need_trans) 1343 return; 1344 1345 sc->bfe_tx_prod = idx; 1346 1347 /* Transmit - twice due to apparent hardware bug */ 1348 CSR_WRITE_4(sc, BFE_DMATX_PTR, idx * sizeof(struct bfe_desc)); 1349 CSR_WRITE_4(sc, BFE_DMATX_PTR, idx * sizeof(struct bfe_desc)); 1350 1351 /* 1352 * Set a timeout in case the chip goes out to lunch. 1353 */ 1354 ifp->if_timer = 5; 1355 } 1356 1357 static void 1358 bfe_init(void *xsc) 1359 { 1360 struct bfe_softc *sc = (struct bfe_softc*)xsc; 1361 struct ifnet *ifp = &sc->arpcom.ac_if; 1362 1363 ASSERT_SERIALIZED(ifp->if_serializer); 1364 1365 if (ifp->if_flags & IFF_RUNNING) 1366 return; 1367 1368 bfe_stop(sc); 1369 bfe_chip_reset(sc); 1370 1371 if (bfe_list_rx_init(sc) == ENOBUFS) { 1372 if_printf(ifp, "bfe_init failed. " 1373 " Not enough memory for list buffers\n"); 1374 bfe_stop(sc); 1375 return; 1376 } 1377 1378 bfe_set_rx_mode(sc); 1379 1380 /* Enable the chip and core */ 1381 BFE_OR(sc, BFE_ENET_CTRL, BFE_ENET_ENABLE); 1382 /* Enable interrupts */ 1383 CSR_WRITE_4(sc, BFE_IMASK, BFE_IMASK_DEF); 1384 1385 bfe_ifmedia_upd(ifp); 1386 ifp->if_flags |= IFF_RUNNING; 1387 ifq_clr_oactive(&ifp->if_snd); 1388 1389 callout_reset(&sc->bfe_stat_timer, hz, bfe_tick, sc); 1390 } 1391 1392 /* 1393 * Set media options. 1394 */ 1395 static int 1396 bfe_ifmedia_upd(struct ifnet *ifp) 1397 { 1398 struct bfe_softc *sc = ifp->if_softc; 1399 struct mii_data *mii; 1400 1401 ASSERT_SERIALIZED(ifp->if_serializer); 1402 1403 mii = device_get_softc(sc->bfe_miibus); 1404 sc->bfe_link = 0; 1405 if (mii->mii_instance) { 1406 struct mii_softc *miisc; 1407 for (miisc = LIST_FIRST(&mii->mii_phys); miisc != NULL; 1408 miisc = LIST_NEXT(miisc, mii_list)) 1409 mii_phy_reset(miisc); 1410 } 1411 mii_mediachg(mii); 1412 1413 bfe_setupphy(sc); 1414 1415 return(0); 1416 } 1417 1418 /* 1419 * Report current media status. 1420 */ 1421 static void 1422 bfe_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 1423 { 1424 struct bfe_softc *sc = ifp->if_softc; 1425 struct mii_data *mii; 1426 1427 ASSERT_SERIALIZED(ifp->if_serializer); 1428 1429 mii = device_get_softc(sc->bfe_miibus); 1430 mii_pollstat(mii); 1431 ifmr->ifm_active = mii->mii_media_active; 1432 ifmr->ifm_status = mii->mii_media_status; 1433 } 1434 1435 static int 1436 bfe_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr) 1437 { 1438 struct bfe_softc *sc = ifp->if_softc; 1439 struct ifreq *ifr = (struct ifreq *) data; 1440 struct mii_data *mii; 1441 int error = 0; 1442 1443 ASSERT_SERIALIZED(ifp->if_serializer); 1444 1445 switch (command) { 1446 case SIOCSIFFLAGS: 1447 if (ifp->if_flags & IFF_UP) 1448 if (ifp->if_flags & IFF_RUNNING) 1449 bfe_set_rx_mode(sc); 1450 else 1451 bfe_init(sc); 1452 else if (ifp->if_flags & IFF_RUNNING) 1453 bfe_stop(sc); 1454 break; 1455 case SIOCADDMULTI: 1456 case SIOCDELMULTI: 1457 if (ifp->if_flags & IFF_RUNNING) 1458 bfe_set_rx_mode(sc); 1459 break; 1460 case SIOCGIFMEDIA: 1461 case SIOCSIFMEDIA: 1462 mii = device_get_softc(sc->bfe_miibus); 1463 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, 1464 command); 1465 break; 1466 default: 1467 error = ether_ioctl(ifp, command, data); 1468 break; 1469 } 1470 return error; 1471 } 1472 1473 static void 1474 bfe_watchdog(struct ifnet *ifp) 1475 { 1476 struct bfe_softc *sc = ifp->if_softc; 1477 1478 ASSERT_SERIALIZED(ifp->if_serializer); 1479 1480 if_printf(ifp, "watchdog timeout -- resetting\n"); 1481 1482 ifp->if_flags &= ~IFF_RUNNING; 1483 bfe_init(sc); 1484 1485 IFNET_STAT_INC(ifp, oerrors, 1); 1486 } 1487 1488 static void 1489 bfe_tick(void *xsc) 1490 { 1491 struct bfe_softc *sc = xsc; 1492 struct mii_data *mii; 1493 struct ifnet *ifp = &sc->arpcom.ac_if; 1494 1495 mii = device_get_softc(sc->bfe_miibus); 1496 1497 lwkt_serialize_enter(ifp->if_serializer); 1498 1499 bfe_stats_update(sc); 1500 callout_reset(&sc->bfe_stat_timer, hz, bfe_tick, sc); 1501 1502 if (sc->bfe_link == 0) { 1503 mii_tick(mii); 1504 if (!sc->bfe_link && mii->mii_media_status & IFM_ACTIVE && 1505 IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) { 1506 sc->bfe_link++; 1507 } 1508 if (!sc->bfe_link) 1509 sc->bfe_link++; 1510 } 1511 lwkt_serialize_exit(ifp->if_serializer); 1512 } 1513 1514 /* 1515 * Stop the adapter and free any mbufs allocated to the 1516 * RX and TX lists. 1517 */ 1518 static void 1519 bfe_stop(struct bfe_softc *sc) 1520 { 1521 struct ifnet *ifp = &sc->arpcom.ac_if; 1522 1523 ASSERT_SERIALIZED(ifp->if_serializer); 1524 1525 callout_stop(&sc->bfe_stat_timer); 1526 1527 bfe_chip_halt(sc); 1528 bfe_tx_ring_free(sc); 1529 bfe_rx_ring_free(sc); 1530 1531 ifp->if_flags &= ~IFF_RUNNING; 1532 ifq_clr_oactive(&ifp->if_snd); 1533 }
Cache object: e059cfb80b862fff3301894562f43322
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]