1/*-
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2 * Copyright (c) 2001 Jonathan Lemon <jlemon@freebsd.org>
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2 * Copyright (c) 1995, David Greenman
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3 * Copyright (c) 2001 Jonathan Lemon <jlemon@freebsd.org> |
4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice unmodified, this list of conditions, and the following 11 * 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 *
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28 * $FreeBSD: head/sys/dev/fxp/if_fxp.c 74180 2001-03-12 21:42:45Z jlemon $
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28 * $FreeBSD: head/sys/dev/fxp/if_fxp.c 74259 2001-03-14 19:50:35Z jlemon $ |
29 */ 30 31/* 32 * Intel EtherExpress Pro/100B PCI Fast Ethernet driver 33 */ 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/mbuf.h> 38#include <sys/malloc.h> 39 /* #include <sys/mutex.h> */ 40#include <sys/kernel.h> 41#include <sys/socket.h> 42 43#include <net/if.h> 44#include <net/if_dl.h> 45#include <net/if_media.h> 46 47#ifdef NS 48#include <netns/ns.h> 49#include <netns/ns_if.h> 50#endif 51 52#include <net/bpf.h> 53#include <sys/sockio.h> 54#include <sys/bus.h> 55#include <machine/bus.h> 56#include <sys/rman.h> 57#include <machine/resource.h> 58 59#include <net/ethernet.h> 60#include <net/if_arp.h> 61 62#include <vm/vm.h> /* for vtophys */ 63#include <vm/pmap.h> /* for vtophys */ 64#include <machine/clock.h> /* for DELAY */ 65 66#include <pci/pcivar.h> 67#include <pci/pcireg.h> /* for PCIM_CMD_xxx */ 68 69#include <dev/mii/mii.h> 70#include <dev/mii/miivar.h> 71 72#include <dev/fxp/if_fxpreg.h> 73#include <dev/fxp/if_fxpvar.h> 74 75MODULE_DEPEND(fxp, miibus, 1, 1, 1); 76#include "miibus_if.h" 77 78/* 79 * NOTE! On the Alpha, we have an alignment constraint. The 80 * card DMAs the packet immediately following the RFA. However, 81 * the first thing in the packet is a 14-byte Ethernet header. 82 * This means that the packet is misaligned. To compensate, 83 * we actually offset the RFA 2 bytes into the cluster. This 84 * alignes the packet after the Ethernet header at a 32-bit 85 * boundary. HOWEVER! This means that the RFA is misaligned! 86 */ 87#define RFA_ALIGNMENT_FUDGE 2 88 89/* 90 * Set initial transmit threshold at 64 (512 bytes). This is 91 * increased by 64 (512 bytes) at a time, to maximum of 192 92 * (1536 bytes), if an underrun occurs. 93 */ 94static int tx_threshold = 64; 95 96/* 97 * The configuration byte map has several undefined fields which 98 * must be one or must be zero. Set up a template for these bits 99 * only, (assuming a 82557 chip) leaving the actual configuration 100 * to fxp_init. 101 * 102 * See struct fxp_cb_config for the bit definitions. 103 */ 104static u_char fxp_cb_config_template[] = { 105 0x0, 0x0, /* cb_status */ 106 0x0, 0x0, /* cb_command */ 107 0x0, 0x0, 0x0, 0x0, /* link_addr */ 108 0x0, /* 0 */ 109 0x0, /* 1 */ 110 0x0, /* 2 */ 111 0x0, /* 3 */ 112 0x0, /* 4 */ 113 0x0, /* 5 */ 114 0x32, /* 6 */ 115 0x0, /* 7 */ 116 0x0, /* 8 */ 117 0x0, /* 9 */ 118 0x6, /* 10 */ 119 0x0, /* 11 */ 120 0x0, /* 12 */ 121 0x0, /* 13 */ 122 0xf2, /* 14 */ 123 0x48, /* 15 */ 124 0x0, /* 16 */ 125 0x40, /* 17 */ 126 0xf0, /* 18 */ 127 0x0, /* 19 */ 128 0x3f, /* 20 */ 129 0x5 /* 21 */ 130}; 131 132struct fxp_ident { 133 u_int16_t devid; 134 char *name; 135}; 136 137/* 138 * Claim various Intel PCI device identifiers for this driver. The 139 * sub-vendor and sub-device field are extensively used to identify 140 * particular variants, but we don't currently differentiate between 141 * them. 142 */ 143static struct fxp_ident fxp_ident_table[] = { 144 { 0x1229, "Intel Pro 10/100B/100+ Ethernet" }, 145 { 0x2449, "Intel Pro/100 Ethernet" }, 146 { 0x1209, "Intel Embedded 10/100 Ethernet" }, 147 { 0x1029, "Intel Pro/100 Ethernet" }, 148 { 0x1030, "Intel Pro/100 Ethernet" }, 149 { 0x1031, "Intel Pro/100 Ethernet" }, 150 { 0x1032, "Intel Pro/100 Ethernet" }, 151 { 0x1033, "Intel Pro/100 Ethernet" }, 152 { 0x1034, "Intel Pro/100 Ethernet" }, 153 { 0x1035, "Intel Pro/100 Ethernet" }, 154 { 0x1036, "Intel Pro/100 Ethernet" }, 155 { 0x1037, "Intel Pro/100 Ethernet" }, 156 { 0x1038, "Intel Pro/100 Ethernet" }, 157 { 0, NULL }, 158}; 159 160static int fxp_probe(device_t dev); 161static int fxp_attach(device_t dev); 162static int fxp_detach(device_t dev); 163static int fxp_shutdown(device_t dev); 164static int fxp_suspend(device_t dev); 165static int fxp_resume(device_t dev); 166 167static void fxp_intr(void *xsc); 168static void fxp_init(void *xsc); 169static void fxp_tick(void *xsc); 170static void fxp_start(struct ifnet *ifp); 171static void fxp_stop(struct fxp_softc *sc); 172static void fxp_release(struct fxp_softc *sc); 173static int fxp_ioctl(struct ifnet *ifp, u_long command, 174 caddr_t data); 175static void fxp_watchdog(struct ifnet *ifp); 176static int fxp_add_rfabuf(struct fxp_softc *sc, struct mbuf *oldm); 177static void fxp_mc_setup(struct fxp_softc *sc); 178static u_int16_t fxp_eeprom_getword(struct fxp_softc *sc, int offset, 179 int autosize); 180static void fxp_autosize_eeprom(struct fxp_softc *sc); 181static void fxp_read_eeprom(struct fxp_softc *sc, u_short *data, 182 int offset, int words); 183static int fxp_ifmedia_upd(struct ifnet *ifp); 184static void fxp_ifmedia_sts(struct ifnet *ifp, 185 struct ifmediareq *ifmr); 186static int fxp_serial_ifmedia_upd(struct ifnet *ifp); 187static void fxp_serial_ifmedia_sts(struct ifnet *ifp, 188 struct ifmediareq *ifmr); 189static volatile int fxp_miibus_readreg(device_t dev, int phy, int reg); 190static void fxp_miibus_writereg(device_t dev, int phy, int reg, 191 int value); 192static __inline void fxp_lwcopy(volatile u_int32_t *src, 193 volatile u_int32_t *dst); 194static __inline void fxp_scb_wait(struct fxp_softc *sc); 195static __inline void fxp_dma_wait(volatile u_int16_t *status, 196 struct fxp_softc *sc); 197 198static device_method_t fxp_methods[] = { 199 /* Device interface */ 200 DEVMETHOD(device_probe, fxp_probe), 201 DEVMETHOD(device_attach, fxp_attach), 202 DEVMETHOD(device_detach, fxp_detach), 203 DEVMETHOD(device_shutdown, fxp_shutdown), 204 DEVMETHOD(device_suspend, fxp_suspend), 205 DEVMETHOD(device_resume, fxp_resume), 206 207 /* MII interface */ 208 DEVMETHOD(miibus_readreg, fxp_miibus_readreg), 209 DEVMETHOD(miibus_writereg, fxp_miibus_writereg), 210 211 { 0, 0 } 212}; 213 214static driver_t fxp_driver = { 215 "fxp", 216 fxp_methods, 217 sizeof(struct fxp_softc), 218}; 219 220static devclass_t fxp_devclass; 221 222DRIVER_MODULE(if_fxp, pci, fxp_driver, fxp_devclass, 0, 0); 223DRIVER_MODULE(if_fxp, cardbus, fxp_driver, fxp_devclass, 0, 0); 224DRIVER_MODULE(miibus, fxp, miibus_driver, miibus_devclass, 0, 0); 225 226/* 227 * Inline function to copy a 16-bit aligned 32-bit quantity. 228 */ 229static __inline void 230fxp_lwcopy(volatile u_int32_t *src, volatile u_int32_t *dst) 231{ 232#ifdef __i386__ 233 *dst = *src; 234#else 235 volatile u_int16_t *a = (volatile u_int16_t *)src; 236 volatile u_int16_t *b = (volatile u_int16_t *)dst; 237 238 b[0] = a[0]; 239 b[1] = a[1]; 240#endif 241} 242 243/* 244 * Wait for the previous command to be accepted (but not necessarily 245 * completed). 246 */ 247static __inline void 248fxp_scb_wait(struct fxp_softc *sc) 249{ 250 int i = 10000; 251 252 while (CSR_READ_1(sc, FXP_CSR_SCB_COMMAND) && --i) 253 DELAY(2); 254 if (i == 0) 255 device_printf(sc->dev, "SCB timeout\n"); 256} 257 258static __inline void 259fxp_dma_wait(volatile u_int16_t *status, struct fxp_softc *sc) 260{ 261 int i = 10000; 262 263 while (!(*status & FXP_CB_STATUS_C) && --i) 264 DELAY(2); 265 if (i == 0) 266 device_printf(sc->dev, "DMA timeout\n"); 267} 268 269/* 270 * Return identification string if this is device is ours. 271 */ 272static int 273fxp_probe(device_t dev) 274{ 275 u_int16_t devid; 276 struct fxp_ident *ident; 277 278 if (pci_get_vendor(dev) == FXP_VENDORID_INTEL) { 279 devid = pci_get_device(dev); 280 for (ident = fxp_ident_table; ident->name != NULL; ident++) { 281 if (ident->devid == devid) { 282 device_set_desc(dev, ident->name); 283 return (0); 284 } 285 } 286 } 287 return (ENXIO); 288} 289 290static int 291fxp_attach(device_t dev) 292{ 293 int error = 0; 294 struct fxp_softc *sc = device_get_softc(dev); 295 struct ifnet *ifp; 296 u_int32_t val; 297 u_int16_t data; 298 int i, rid, m1, m2, prefer_iomap; 299 int s; 300 301 bzero(sc, sizeof(*sc)); 302 sc->dev = dev; 303 callout_handle_init(&sc->stat_ch); 304 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_DEF | MTX_RECURSE); 305 306 s = splimp(); 307 308 /* 309 * Enable bus mastering. Enable memory space too, in case 310 * BIOS/Prom forgot about it. 311 */ 312 val = pci_read_config(dev, PCIR_COMMAND, 2); 313 val |= (PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN); 314 pci_write_config(dev, PCIR_COMMAND, val, 2); 315 val = pci_read_config(dev, PCIR_COMMAND, 2); 316 317#if __FreeBSD_version >= 500000 318 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 319 u_int32_t iobase, membase, irq; 320 321 /* Save important PCI config data. */ 322 iobase = pci_read_config(dev, FXP_PCI_IOBA, 4); 323 membase = pci_read_config(dev, FXP_PCI_MMBA, 4); 324 irq = pci_read_config(dev, PCIR_INTLINE, 4); 325 326 /* Reset the power state. */ 327 device_printf(dev, "chip is in D%d power mode " 328 "-- setting to D0\n", pci_get_powerstate(dev)); 329 330 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 331 332 /* Restore PCI config data. */ 333 pci_write_config(dev, FXP_PCI_IOBA, iobase, 4); 334 pci_write_config(dev, FXP_PCI_MMBA, membase, 4); 335 pci_write_config(dev, PCIR_INTLINE, irq, 4); 336 } 337#endif 338 339 /* 340 * Figure out which we should try first - memory mapping or i/o mapping? 341 * We default to memory mapping. Then we accept an override from the 342 * command line. Then we check to see which one is enabled. 343 */ 344 m1 = PCIM_CMD_MEMEN; 345 m2 = PCIM_CMD_PORTEN; 346 prefer_iomap = 0; 347 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 348 "prefer_iomap", &prefer_iomap) == 0 && prefer_iomap != 0) { 349 m1 = PCIM_CMD_PORTEN; 350 m2 = PCIM_CMD_MEMEN; 351 } 352 353 if (val & m1) { 354 sc->rtp = 355 (m1 == PCIM_CMD_MEMEN)? SYS_RES_MEMORY : SYS_RES_IOPORT; 356 sc->rgd = (m1 == PCIM_CMD_MEMEN)? FXP_PCI_MMBA : FXP_PCI_IOBA; 357 sc->mem = bus_alloc_resource(dev, sc->rtp, &sc->rgd, 358 0, ~0, 1, RF_ACTIVE); 359 } 360 if (sc->mem == NULL && (val & m2)) { 361 sc->rtp = 362 (m2 == PCIM_CMD_MEMEN)? SYS_RES_MEMORY : SYS_RES_IOPORT; 363 sc->rgd = (m2 == PCIM_CMD_MEMEN)? FXP_PCI_MMBA : FXP_PCI_IOBA; 364 sc->mem = bus_alloc_resource(dev, sc->rtp, &sc->rgd, 365 0, ~0, 1, RF_ACTIVE); 366 } 367 368 if (!sc->mem) { 369 device_printf(dev, "could not map device registers\n"); 370 error = ENXIO; 371 goto fail; 372 } 373 if (bootverbose) { 374 device_printf(dev, "using %s space register mapping\n", 375 sc->rtp == SYS_RES_MEMORY? "memory" : "I/O"); 376 } 377 378 sc->sc_st = rman_get_bustag(sc->mem); 379 sc->sc_sh = rman_get_bushandle(sc->mem); 380 381 /* 382 * Allocate our interrupt. 383 */ 384 rid = 0; 385 sc->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, 386 RF_SHAREABLE | RF_ACTIVE); 387 if (sc->irq == NULL) { 388 device_printf(dev, "could not map interrupt\n"); 389 error = ENXIO; 390 goto fail; 391 } 392 393 error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET, 394 fxp_intr, sc, &sc->ih); 395 if (error) { 396 device_printf(dev, "could not setup irq\n"); 397 goto fail; 398 } 399 400 /* 401 * Reset to a stable state. 402 */ 403 CSR_WRITE_4(sc, FXP_CSR_PORT, FXP_PORT_SELECTIVE_RESET); 404 DELAY(10); 405 406 sc->cbl_base = malloc(sizeof(struct fxp_cb_tx) * FXP_NTXCB, 407 M_DEVBUF, M_NOWAIT | M_ZERO); 408 if (sc->cbl_base == NULL) 409 goto failmem; 410 411 sc->fxp_stats = malloc(sizeof(struct fxp_stats), M_DEVBUF, 412 M_NOWAIT | M_ZERO); 413 if (sc->fxp_stats == NULL) 414 goto failmem; 415 416 sc->mcsp = malloc(sizeof(struct fxp_cb_mcs), M_DEVBUF, M_NOWAIT); 417 if (sc->mcsp == NULL) 418 goto failmem; 419 420 /* 421 * Pre-allocate our receive buffers. 422 */ 423 for (i = 0; i < FXP_NRFABUFS; i++) { 424 if (fxp_add_rfabuf(sc, NULL) != 0) { 425 goto failmem; 426 } 427 } 428 429 /* 430 * Find out how large of an SEEPROM we have. 431 */ 432 fxp_autosize_eeprom(sc); 433 434 /*
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435 * Determine in whether we must use the 503 serial interface.
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435 * Determine whether we must use the 503 serial interface. |
436 */ 437 fxp_read_eeprom(sc, &data, 6, 1); 438 if ((data & FXP_PHY_DEVICE_MASK) != 0 && 439 (data & FXP_PHY_SERIAL_ONLY)) 440 sc->flags &= FXP_FLAG_SERIAL_MEDIA; 441 442 /*
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443 * Find out the basic controller type; we currently only 444 * differentiate between a 82557 and greater. 445 */ 446 fxp_read_eeprom(sc, &data, 5, 1); 447 if ((data >> 8) == 1) 448 sc->chip = FXP_CHIP_82557; 449 450 /* 451 * If we are not a 82557 chip, we can enable extended features. 452 */ 453 if (sc->chip != FXP_CHIP_82557) { 454 /* 455 * If there is a valid cacheline size (8 or 16 dwords), 456 * then turn on MWI. 457 */ 458 if (pci_read_config(dev, PCIR_CACHELNSZ, 1) != 0) 459 sc->flags |= FXP_FLAG_MWI_ENABLE; 460 461 /* turn on the extended TxCB feature */ 462 sc->flags |= FXP_FLAG_EXT_TXCB; 463 } 464 465 /* |
466 * Read MAC address. 467 */ 468 fxp_read_eeprom(sc, (u_int16_t *)sc->arpcom.ac_enaddr, 0, 3); 469 device_printf(dev, "Ethernet address %6D%s\n", 470 sc->arpcom.ac_enaddr, ":", 471 sc->flags & FXP_FLAG_SERIAL_MEDIA ? ", 10Mbps" : ""); 472 if (bootverbose) { 473 device_printf(dev, "PCI IDs: %04x %04x %04x %04x\n", 474 pci_get_vendor(dev), pci_get_device(dev), 475 pci_get_subvendor(dev), pci_get_subdevice(dev)); 476 } 477 478 /* 479 * If this is only a 10Mbps device, then there is no MII, and 480 * the PHY will use a serial interface instead. 481 * 482 * The Seeq 80c24 AutoDUPLEX(tm) Ethernet Interface Adapter 483 * doesn't have a programming interface of any sort. The 484 * media is sensed automatically based on how the link partner 485 * is configured. This is, in essence, manual configuration. 486 */ 487 if (sc->flags & FXP_FLAG_SERIAL_MEDIA) { 488 ifmedia_init(&sc->sc_media, 0, fxp_serial_ifmedia_upd, 489 fxp_serial_ifmedia_sts); 490 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 491 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 492 } else { 493 if (mii_phy_probe(dev, &sc->miibus, fxp_ifmedia_upd, 494 fxp_ifmedia_sts)) { 495 device_printf(dev, "MII without any PHY!\n"); 496 error = ENXIO; 497 goto fail; 498 } 499 } 500 501 ifp = &sc->arpcom.ac_if; 502 ifp->if_unit = device_get_unit(dev); 503 ifp->if_name = "fxp"; 504 ifp->if_output = ether_output; 505 ifp->if_baudrate = 100000000; 506 ifp->if_init = fxp_init; 507 ifp->if_softc = sc; 508 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 509 ifp->if_ioctl = fxp_ioctl; 510 ifp->if_start = fxp_start; 511 ifp->if_watchdog = fxp_watchdog; 512 513 /* 514 * Attach the interface. 515 */ 516 ether_ifattach(ifp, ETHER_BPF_SUPPORTED); 517 518 /* 519 * Let the system queue as many packets as we have available 520 * TX descriptors. 521 */ 522 ifp->if_snd.ifq_maxlen = FXP_NTXCB - 1; 523 524 splx(s); 525 return (0); 526 527failmem: 528 device_printf(dev, "Failed to malloc memory\n"); 529 error = ENOMEM; 530fail: 531 splx(s); 532 fxp_release(sc); 533 return (error); 534} 535 536/* 537 * release all resources 538 */ 539static void 540fxp_release(struct fxp_softc *sc) 541{ 542
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520 if (sc->miibus) {
521 bus_generic_detach(sc->dev);
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543 bus_generic_detach(sc->dev); 544 if (sc->miibus) |
545 device_delete_child(sc->dev, sc->miibus);
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523 }
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546 547 if (sc->cbl_base) 548 free(sc->cbl_base, M_DEVBUF); 549 if (sc->fxp_stats) 550 free(sc->fxp_stats, M_DEVBUF); 551 if (sc->mcsp) 552 free(sc->mcsp, M_DEVBUF); 553 if (sc->rfa_headm) 554 m_freem(sc->rfa_headm); 555 556 if (sc->ih) 557 bus_teardown_intr(sc->dev, sc->irq, sc->ih); 558 if (sc->irq) 559 bus_release_resource(sc->dev, SYS_RES_IRQ, 0, sc->irq); 560 if (sc->mem) 561 bus_release_resource(sc->dev, sc->rtp, sc->rgd, sc->mem); 562 mtx_destroy(&sc->sc_mtx); 563} 564 565/* 566 * Detach interface. 567 */ 568static int 569fxp_detach(device_t dev) 570{ 571 struct fxp_softc *sc = device_get_softc(dev); 572 int s; 573 574 s = splimp(); 575 576 /* 577 * Stop DMA and drop transmit queue. 578 */ 579 fxp_stop(sc); 580 581 /* 582 * Close down routes etc. 583 */ 584 ether_ifdetach(&sc->arpcom.ac_if, ETHER_BPF_SUPPORTED); 585 586 /* 587 * Free all media structures. 588 */ 589 ifmedia_removeall(&sc->sc_media); 590 591 splx(s); 592 593 /* Release our allocated resources. */ 594 fxp_release(sc); 595 596 return (0); 597} 598 599/* 600 * Device shutdown routine. Called at system shutdown after sync. The 601 * main purpose of this routine is to shut off receiver DMA so that 602 * kernel memory doesn't get clobbered during warmboot. 603 */ 604static int 605fxp_shutdown(device_t dev) 606{ 607 /* 608 * Make sure that DMA is disabled prior to reboot. Not doing 609 * do could allow DMA to corrupt kernel memory during the 610 * reboot before the driver initializes. 611 */ 612 fxp_stop((struct fxp_softc *) device_get_softc(dev)); 613 return (0); 614} 615 616/* 617 * Device suspend routine. Stop the interface and save some PCI 618 * settings in case the BIOS doesn't restore them properly on 619 * resume. 620 */ 621static int 622fxp_suspend(device_t dev) 623{ 624 struct fxp_softc *sc = device_get_softc(dev); 625 int i, s; 626 627 s = splimp(); 628 629 fxp_stop(sc); 630 631 for (i=0; i<5; i++) 632 sc->saved_maps[i] = pci_read_config(dev, PCIR_MAPS + i*4, 4); 633 sc->saved_biosaddr = pci_read_config(dev, PCIR_BIOS, 4); 634 sc->saved_intline = pci_read_config(dev, PCIR_INTLINE, 1); 635 sc->saved_cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1); 636 sc->saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1); 637 638 sc->suspended = 1; 639 640 splx(s); 641 return (0); 642} 643 644/* 645 * Device resume routine. Restore some PCI settings in case the BIOS 646 * doesn't, re-enable busmastering, and restart the interface if 647 * appropriate. 648 */ 649static int 650fxp_resume(device_t dev) 651{ 652 struct fxp_softc *sc = device_get_softc(dev); 653 struct ifnet *ifp = &sc->sc_if; 654 u_int16_t pci_command; 655 int i, s; 656 657 s = splimp(); 658 659 /* better way to do this? */ 660 for (i=0; i<5; i++) 661 pci_write_config(dev, PCIR_MAPS + i*4, sc->saved_maps[i], 4); 662 pci_write_config(dev, PCIR_BIOS, sc->saved_biosaddr, 4); 663 pci_write_config(dev, PCIR_INTLINE, sc->saved_intline, 1); 664 pci_write_config(dev, PCIR_CACHELNSZ, sc->saved_cachelnsz, 1); 665 pci_write_config(dev, PCIR_LATTIMER, sc->saved_lattimer, 1); 666 667 /* reenable busmastering */ 668 pci_command = pci_read_config(dev, PCIR_COMMAND, 2); 669 pci_command |= (PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN); 670 pci_write_config(dev, PCIR_COMMAND, pci_command, 2); 671 672 CSR_WRITE_4(sc, FXP_CSR_PORT, FXP_PORT_SELECTIVE_RESET); 673 DELAY(10); 674 675 /* reinitialize interface if necessary */ 676 if (ifp->if_flags & IFF_UP) 677 fxp_init(sc); 678 679 sc->suspended = 0; 680 681 splx(s); 682 return (0); 683} 684 685/* 686 * Read from the serial EEPROM. Basically, you manually shift in 687 * the read opcode (one bit at a time) and then shift in the address, 688 * and then you shift out the data (all of this one bit at a time). 689 * The word size is 16 bits, so you have to provide the address for 690 * every 16 bits of data. 691 */ 692static u_int16_t 693fxp_eeprom_getword(struct fxp_softc *sc, int offset, int autosize) 694{ 695 u_int16_t reg, data; 696 int x; 697 698 CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, FXP_EEPROM_EECS); 699 /* 700 * Shift in read opcode. 701 */ 702 for (x = 1 << 2; x; x >>= 1) { 703 if (FXP_EEPROM_OPC_READ & x) 704 reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI; 705 else 706 reg = FXP_EEPROM_EECS; 707 CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg); 708 DELAY(1); 709 CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg | FXP_EEPROM_EESK); 710 DELAY(1); 711 CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg); 712 DELAY(1); 713 } 714 /* 715 * Shift in address. 716 */ 717 data = 0; 718 for (x = 1 << (sc->eeprom_size - 1); x; x >>= 1) { 719 if (offset & x) 720 reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI; 721 else 722 reg = FXP_EEPROM_EECS; 723 CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg); 724 DELAY(1); 725 CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg | FXP_EEPROM_EESK); 726 DELAY(1); 727 CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg); 728 DELAY(1); 729 reg = CSR_READ_2(sc, FXP_CSR_EEPROMCONTROL) & FXP_EEPROM_EEDO; 730 data++; 731 if (autosize && reg == 0) { 732 sc->eeprom_size = data; 733 break; 734 } 735 } 736 /* 737 * Shift out data. 738 */ 739 data = 0; 740 reg = FXP_EEPROM_EECS; 741 for (x = 1 << 15; x; x >>= 1) { 742 CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg | FXP_EEPROM_EESK); 743 DELAY(1); 744 if (CSR_READ_2(sc, FXP_CSR_EEPROMCONTROL) & FXP_EEPROM_EEDO) 745 data |= x; 746 CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg); 747 DELAY(1); 748 } 749 CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, 0); 750 DELAY(1); 751 752 return (data); 753} 754 755/* 756 * From NetBSD: 757 * 758 * Figure out EEPROM size. 759 * 760 * 559's can have either 64-word or 256-word EEPROMs, the 558 761 * datasheet only talks about 64-word EEPROMs, and the 557 datasheet 762 * talks about the existance of 16 to 256 word EEPROMs. 763 * 764 * The only known sizes are 64 and 256, where the 256 version is used 765 * by CardBus cards to store CIS information. 766 * 767 * The address is shifted in msb-to-lsb, and after the last 768 * address-bit the EEPROM is supposed to output a `dummy zero' bit, 769 * after which follows the actual data. We try to detect this zero, by 770 * probing the data-out bit in the EEPROM control register just after 771 * having shifted in a bit. If the bit is zero, we assume we've 772 * shifted enough address bits. The data-out should be tri-state, 773 * before this, which should translate to a logical one. 774 * 775 * Other ways to do this would be to try to read a register with known 776 * contents with a varying number of address bits, but no such 777 * register seem to be available. The high bits of register 10 are 01 778 * on the 558 and 559, but apparently not on the 557. 779 * 780 * The Linux driver computes a checksum on the EEPROM data, but the 781 * value of this checksum is not very well documented. 782 */ 783static void 784fxp_autosize_eeprom(struct fxp_softc *sc) 785{ 786 787 /* guess maximum size of 256 words */ 788 sc->eeprom_size = 8; 789 790 /* autosize */ 791 (void) fxp_eeprom_getword(sc, 0, 1); 792} 793 794static void 795fxp_read_eeprom(struct fxp_softc *sc, u_short *data, int offset, int words) 796{ 797 int i; 798 799 for (i = 0; i < words; i++) 800 data[i] = fxp_eeprom_getword(sc, offset + i, 0); 801} 802 803/* 804 * Start packet transmission on the interface. 805 */ 806static void 807fxp_start(struct ifnet *ifp) 808{ 809 struct fxp_softc *sc = ifp->if_softc; 810 struct fxp_cb_tx *txp; 811 812 /* 813 * See if we need to suspend xmit until the multicast filter 814 * has been reprogrammed (which can only be done at the head 815 * of the command chain). 816 */ 817 if (sc->need_mcsetup) { 818 return; 819 } 820 821 txp = NULL; 822 823 /* 824 * We're finished if there is nothing more to add to the list or if 825 * we're all filled up with buffers to transmit. 826 * NOTE: One TxCB is reserved to guarantee that fxp_mc_setup() can add 827 * a NOP command when needed. 828 */ 829 while (ifp->if_snd.ifq_head != NULL && sc->tx_queued < FXP_NTXCB - 1) { 830 struct mbuf *m, *mb_head; 831 int segment; 832 833 /* 834 * Grab a packet to transmit. 835 */ 836 IF_DEQUEUE(&ifp->if_snd, mb_head); 837 838 /* 839 * Get pointer to next available tx desc. 840 */ 841 txp = sc->cbl_last->next; 842 843 /* 844 * Go through each of the mbufs in the chain and initialize 845 * the transmit buffer descriptors with the physical address 846 * and size of the mbuf. 847 */ 848tbdinit: 849 for (m = mb_head, segment = 0; m != NULL; m = m->m_next) { 850 if (m->m_len != 0) { 851 if (segment == FXP_NTXSEG) 852 break; 853 txp->tbd[segment].tb_addr = 854 vtophys(mtod(m, vm_offset_t)); 855 txp->tbd[segment].tb_size = m->m_len; 856 segment++; 857 } 858 } 859 if (m != NULL) { 860 struct mbuf *mn; 861 862 /*
|
841 * We ran out of segments. We have to recopy this mbuf
842 * chain first. Bail out if we can't get the new buffers.
|
863 * We ran out of segments. We have to recopy this 864 * mbuf chain first. Bail out if we can't get the 865 * new buffers. |
866 */ 867 MGETHDR(mn, M_DONTWAIT, MT_DATA); 868 if (mn == NULL) { 869 m_freem(mb_head); 870 break; 871 } 872 if (mb_head->m_pkthdr.len > MHLEN) { 873 MCLGET(mn, M_DONTWAIT); 874 if ((mn->m_flags & M_EXT) == 0) { 875 m_freem(mn); 876 m_freem(mb_head); 877 break; 878 } 879 } 880 m_copydata(mb_head, 0, mb_head->m_pkthdr.len, 881 mtod(mn, caddr_t)); 882 mn->m_pkthdr.len = mn->m_len = mb_head->m_pkthdr.len; 883 m_freem(mb_head); 884 mb_head = mn; 885 goto tbdinit; 886 } 887 888 txp->tbd_number = segment; 889 txp->mb_head = mb_head; 890 txp->cb_status = 0; 891 if (sc->tx_queued != FXP_CXINT_THRESH - 1) { 892 txp->cb_command =
|
870 FXP_CB_COMMAND_XMIT | FXP_CB_COMMAND_SF | FXP_CB_COMMAND_S;
|
893 FXP_CB_COMMAND_XMIT | FXP_CB_COMMAND_SF | 894 FXP_CB_COMMAND_S; |
895 } else { 896 txp->cb_command =
|
873 FXP_CB_COMMAND_XMIT | FXP_CB_COMMAND_SF | FXP_CB_COMMAND_S | FXP_CB_COMMAND_I;
|
897 FXP_CB_COMMAND_XMIT | FXP_CB_COMMAND_SF | 898 FXP_CB_COMMAND_S | FXP_CB_COMMAND_I; |
899 /*
|
875 * Set a 5 second timer just in case we don't hear from the
876 * card again.
|
900 * Set a 5 second timer just in case we don't hear 901 * from the card again. |
902 */ 903 ifp->if_timer = 5; 904 } 905 txp->tx_threshold = tx_threshold; 906 907 /* 908 * Advance the end of list forward. 909 */ 910 911#ifdef __alpha__ 912 /* 913 * On platforms which can't access memory in 16-bit 914 * granularities, we must prevent the card from DMA'ing 915 * up the status while we update the command field. 916 * This could cause us to overwrite the completion status. 917 */ 918 atomic_clear_short(&sc->cbl_last->cb_command, 919 FXP_CB_COMMAND_S); 920#else 921 sc->cbl_last->cb_command &= ~FXP_CB_COMMAND_S; 922#endif /*__alpha__*/ 923 sc->cbl_last = txp; 924 925 /* 926 * Advance the beginning of the list forward if there are 927 * no other packets queued (when nothing is queued, cbl_first 928 * sits on the last TxCB that was sent out). 929 */ 930 if (sc->tx_queued == 0) 931 sc->cbl_first = txp; 932 933 sc->tx_queued++; 934 935 /* 936 * Pass packet to bpf if there is a listener. 937 */ 938 if (ifp->if_bpf) 939 bpf_mtap(ifp, mb_head); 940 } 941 942 /* 943 * We're finished. If we added to the list, issue a RESUME to get DMA 944 * going again if suspended. 945 */ 946 if (txp != NULL) { 947 fxp_scb_wait(sc); 948 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_RESUME); 949 } 950} 951 952/* 953 * Process interface interrupts. 954 */ 955static void 956fxp_intr(void *xsc) 957{ 958 struct fxp_softc *sc = xsc; 959 struct ifnet *ifp = &sc->sc_if; 960 u_int8_t statack; 961 962 963 if (sc->suspended) { 964 return; 965 } 966 967 while ((statack = CSR_READ_1(sc, FXP_CSR_SCB_STATACK)) != 0) { 968 /* 969 * First ACK all the interrupts in this pass. 970 */ 971 CSR_WRITE_1(sc, FXP_CSR_SCB_STATACK, statack); 972 973 /* 974 * Free any finished transmit mbuf chains. 975 * 976 * Handle the CNA event likt a CXTNO event. It used to 977 * be that this event (control unit not ready) was not 978 * encountered, but it is now with the SMPng modifications. 979 * The exact sequence of events that occur when the interface 980 * is brought up are different now, and if this event 981 * goes unhandled, the configuration/rxfilter setup sequence 982 * can stall for several seconds. The result is that no 983 * packets go out onto the wire for about 5 to 10 seconds 984 * after the interface is ifconfig'ed for the first time. 985 */ 986 if (statack & (FXP_SCB_STATACK_CXTNO | FXP_SCB_STATACK_CNA)) { 987 struct fxp_cb_tx *txp; 988 989 for (txp = sc->cbl_first; sc->tx_queued && 990 (txp->cb_status & FXP_CB_STATUS_C) != 0; 991 txp = txp->next) { 992 if (txp->mb_head != NULL) { 993 m_freem(txp->mb_head); 994 txp->mb_head = NULL; 995 } 996 sc->tx_queued--; 997 } 998 sc->cbl_first = txp; 999 ifp->if_timer = 0; 1000 if (sc->tx_queued == 0) { 1001 if (sc->need_mcsetup) 1002 fxp_mc_setup(sc); 1003 } 1004 /* 1005 * Try to start more packets transmitting. 1006 */ 1007 if (ifp->if_snd.ifq_head != NULL) 1008 fxp_start(ifp); 1009 } 1010 /* 1011 * Process receiver interrupts. If a no-resource (RNR) 1012 * condition exists, get whatever packets we can and 1013 * re-start the receiver. 1014 */ 1015 if (statack & (FXP_SCB_STATACK_FR | FXP_SCB_STATACK_RNR)) { 1016 struct mbuf *m; 1017 struct fxp_rfa *rfa; 1018rcvloop: 1019 m = sc->rfa_headm; 1020 rfa = (struct fxp_rfa *)(m->m_ext.ext_buf + 1021 RFA_ALIGNMENT_FUDGE); 1022 1023 if (rfa->rfa_status & FXP_RFA_STATUS_C) { 1024 /* 1025 * Remove first packet from the chain. 1026 */ 1027 sc->rfa_headm = m->m_next; 1028 m->m_next = NULL; 1029 1030 /* 1031 * Add a new buffer to the receive chain. 1032 * If this fails, the old buffer is recycled 1033 * instead. 1034 */ 1035 if (fxp_add_rfabuf(sc, m) == 0) { 1036 struct ether_header *eh; 1037 int total_len; 1038 1039 total_len = rfa->actual_size & 1040 (MCLBYTES - 1); 1041 if (total_len < 1042 sizeof(struct ether_header)) { 1043 m_freem(m); 1044 goto rcvloop; 1045 } 1046 m->m_pkthdr.rcvif = ifp; 1047 m->m_pkthdr.len = m->m_len = total_len; 1048 eh = mtod(m, struct ether_header *); 1049 m->m_data += 1050 sizeof(struct ether_header); 1051 m->m_len -= 1052 sizeof(struct ether_header); 1053 m->m_pkthdr.len = m->m_len; 1054 ether_input(ifp, eh, m); 1055 } 1056 goto rcvloop; 1057 } 1058 if (statack & FXP_SCB_STATACK_RNR) { 1059 fxp_scb_wait(sc); 1060 CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, 1061 vtophys(sc->rfa_headm->m_ext.ext_buf) + 1062 RFA_ALIGNMENT_FUDGE); 1063 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, 1064 FXP_SCB_COMMAND_RU_START); 1065 } 1066 } 1067 } 1068} 1069 1070/* 1071 * Update packet in/out/collision statistics. The i82557 doesn't 1072 * allow you to access these counters without doing a fairly 1073 * expensive DMA to get _all_ of the statistics it maintains, so 1074 * we do this operation here only once per second. The statistics 1075 * counters in the kernel are updated from the previous dump-stats 1076 * DMA and then a new dump-stats DMA is started. The on-chip 1077 * counters are zeroed when the DMA completes. If we can't start 1078 * the DMA immediately, we don't wait - we just prepare to read 1079 * them again next time. 1080 */ 1081static void 1082fxp_tick(void *xsc) 1083{ 1084 struct fxp_softc *sc = xsc; 1085 struct ifnet *ifp = &sc->sc_if; 1086 struct fxp_stats *sp = sc->fxp_stats; 1087 struct fxp_cb_tx *txp; 1088 int s; 1089 1090 ifp->if_opackets += sp->tx_good; 1091 ifp->if_collisions += sp->tx_total_collisions; 1092 if (sp->rx_good) { 1093 ifp->if_ipackets += sp->rx_good; 1094 sc->rx_idle_secs = 0; 1095 } else { 1096 /* 1097 * Receiver's been idle for another second. 1098 */ 1099 sc->rx_idle_secs++; 1100 } 1101 ifp->if_ierrors += 1102 sp->rx_crc_errors + 1103 sp->rx_alignment_errors + 1104 sp->rx_rnr_errors + 1105 sp->rx_overrun_errors; 1106 /* 1107 * If any transmit underruns occured, bump up the transmit 1108 * threshold by another 512 bytes (64 * 8). 1109 */ 1110 if (sp->tx_underruns) { 1111 ifp->if_oerrors += sp->tx_underruns; 1112 if (tx_threshold < 192) 1113 tx_threshold += 64; 1114 } 1115 s = splimp(); 1116 /* 1117 * Release any xmit buffers that have completed DMA. This isn't 1118 * strictly necessary to do here, but it's advantagous for mbufs 1119 * with external storage to be released in a timely manner rather 1120 * than being defered for a potentially long time. This limits 1121 * the delay to a maximum of one second. 1122 */ 1123 for (txp = sc->cbl_first; sc->tx_queued && 1124 (txp->cb_status & FXP_CB_STATUS_C) != 0; 1125 txp = txp->next) { 1126 if (txp->mb_head != NULL) { 1127 m_freem(txp->mb_head); 1128 txp->mb_head = NULL; 1129 } 1130 sc->tx_queued--; 1131 } 1132 sc->cbl_first = txp; 1133 /* 1134 * If we haven't received any packets in FXP_MAC_RX_IDLE seconds, 1135 * then assume the receiver has locked up and attempt to clear 1136 * the condition by reprogramming the multicast filter. This is 1137 * a work-around for a bug in the 82557 where the receiver locks 1138 * up if it gets certain types of garbage in the syncronization 1139 * bits prior to the packet header. This bug is supposed to only 1140 * occur in 10Mbps mode, but has been seen to occur in 100Mbps 1141 * mode as well (perhaps due to a 10/100 speed transition). 1142 */ 1143 if (sc->rx_idle_secs > FXP_MAX_RX_IDLE) { 1144 sc->rx_idle_secs = 0; 1145 fxp_mc_setup(sc); 1146 } 1147 /* 1148 * If there is no pending command, start another stats 1149 * dump. Otherwise punt for now. 1150 */ 1151 if (CSR_READ_1(sc, FXP_CSR_SCB_COMMAND) == 0) { 1152 /* 1153 * Start another stats dump. 1154 */ 1155 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, 1156 FXP_SCB_COMMAND_CU_DUMPRESET); 1157 } else { 1158 /* 1159 * A previous command is still waiting to be accepted. 1160 * Just zero our copy of the stats and wait for the 1161 * next timer event to update them. 1162 */ 1163 sp->tx_good = 0; 1164 sp->tx_underruns = 0; 1165 sp->tx_total_collisions = 0; 1166 1167 sp->rx_good = 0; 1168 sp->rx_crc_errors = 0; 1169 sp->rx_alignment_errors = 0; 1170 sp->rx_rnr_errors = 0; 1171 sp->rx_overrun_errors = 0; 1172 } 1173 1174 if (sc->miibus != NULL) 1175 mii_tick(device_get_softc(sc->miibus)); 1176 1177 /* 1178 * Schedule another timeout one second from now. 1179 */ 1180 sc->stat_ch = timeout(fxp_tick, sc, hz); 1181} 1182 1183/* 1184 * Stop the interface. Cancels the statistics updater and resets 1185 * the interface. 1186 */ 1187static void 1188fxp_stop(struct fxp_softc *sc) 1189{ 1190 struct ifnet *ifp = &sc->sc_if; 1191 struct fxp_cb_tx *txp; 1192 int i; 1193 1194 1195 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1196 ifp->if_timer = 0; 1197 1198 /* 1199 * Cancel stats updater. 1200 */ 1201 untimeout(fxp_tick, sc, sc->stat_ch); 1202 1203 /* 1204 * Issue software reset 1205 */ 1206 CSR_WRITE_4(sc, FXP_CSR_PORT, FXP_PORT_SELECTIVE_RESET); 1207 DELAY(10); 1208 1209 /* 1210 * Release any xmit buffers. 1211 */ 1212 txp = sc->cbl_base; 1213 if (txp != NULL) { 1214 for (i = 0; i < FXP_NTXCB; i++) { 1215 if (txp[i].mb_head != NULL) { 1216 m_freem(txp[i].mb_head); 1217 txp[i].mb_head = NULL; 1218 } 1219 } 1220 } 1221 sc->tx_queued = 0; 1222 1223 /* 1224 * Free all the receive buffers then reallocate/reinitialize 1225 */ 1226 if (sc->rfa_headm != NULL) 1227 m_freem(sc->rfa_headm); 1228 sc->rfa_headm = NULL; 1229 sc->rfa_tailm = NULL; 1230 for (i = 0; i < FXP_NRFABUFS; i++) { 1231 if (fxp_add_rfabuf(sc, NULL) != 0) { 1232 /* 1233 * This "can't happen" - we're at splimp() 1234 * and we just freed all the buffers we need 1235 * above. 1236 */ 1237 panic("fxp_stop: no buffers!"); 1238 } 1239 } 1240} 1241 1242/* 1243 * Watchdog/transmission transmit timeout handler. Called when a 1244 * transmission is started on the interface, but no interrupt is 1245 * received before the timeout. This usually indicates that the 1246 * card has wedged for some reason. 1247 */ 1248static void 1249fxp_watchdog(struct ifnet *ifp) 1250{ 1251 struct fxp_softc *sc = ifp->if_softc; 1252 1253 device_printf(sc->dev, "device timeout\n"); 1254 ifp->if_oerrors++; 1255 1256 fxp_init(sc); 1257} 1258 1259static void 1260fxp_init(void *xsc) 1261{ 1262 struct fxp_softc *sc = xsc; 1263 struct ifnet *ifp = &sc->sc_if; 1264 struct fxp_cb_config *cbp; 1265 struct fxp_cb_ias *cb_ias; 1266 struct fxp_cb_tx *txp; 1267 int i, prm, s; 1268 1269 s = splimp(); 1270 /* 1271 * Cancel any pending I/O 1272 */ 1273 fxp_stop(sc); 1274 1275 prm = (ifp->if_flags & IFF_PROMISC) ? 1 : 0; 1276 1277 /* 1278 * Initialize base of CBL and RFA memory. Loading with zero 1279 * sets it up for regular linear addressing. 1280 */ 1281 CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, 0); 1282 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_BASE); 1283 1284 fxp_scb_wait(sc); 1285 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_RU_BASE); 1286 1287 /* 1288 * Initialize base of dump-stats buffer. 1289 */ 1290 fxp_scb_wait(sc); 1291 CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, vtophys(sc->fxp_stats)); 1292 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_DUMP_ADR); 1293 1294 /* 1295 * We temporarily use memory that contains the TxCB list to 1296 * construct the config CB. The TxCB list memory is rebuilt 1297 * later. 1298 */ 1299 cbp = (struct fxp_cb_config *) sc->cbl_base; 1300 1301 /* 1302 * This bcopy is kind of disgusting, but there are a bunch of must be 1303 * zero and must be one bits in this structure and this is the easiest 1304 * way to initialize them all to proper values. 1305 */ 1306 bcopy(fxp_cb_config_template, 1307 (void *)(uintptr_t)(volatile void *)&cbp->cb_status, 1308 sizeof(fxp_cb_config_template)); 1309 1310 cbp->cb_status = 0; 1311 cbp->cb_command = FXP_CB_COMMAND_CONFIG | FXP_CB_COMMAND_EL; 1312 cbp->link_addr = -1; /* (no) next command */ 1313 cbp->byte_count = 22; /* (22) bytes to config */ 1314 cbp->rx_fifo_limit = 8; /* rx fifo threshold (32 bytes) */ 1315 cbp->tx_fifo_limit = 0; /* tx fifo threshold (0 bytes) */ 1316 cbp->adaptive_ifs = 0; /* (no) adaptive interframe spacing */ 1317 cbp->mwi_enable = sc->flags & FXP_FLAG_MWI_ENABLE ? 1 : 0; 1318 cbp->type_enable = 0; /* actually reserved */ 1319 cbp->read_align_en = sc->flags & FXP_FLAG_READ_ALIGN ? 1 : 0; 1320 cbp->end_wr_on_cl = sc->flags & FXP_FLAG_WRITE_ALIGN ? 1 : 0; 1321 cbp->rx_dma_bytecount = 0; /* (no) rx DMA max */ 1322 cbp->tx_dma_bytecount = 0; /* (no) tx DMA max */ 1323 cbp->dma_mbce = 0; /* (disable) dma max counters */ 1324 cbp->late_scb = 0; /* (don't) defer SCB update */ 1325 cbp->direct_dma_dis = 1; /* disable direct rcv dma mode */ 1326 cbp->tno_int_or_tco_en =0; /* (disable) tx not okay interrupt */ 1327 cbp->ci_int = 1; /* interrupt on CU idle */ 1328 cbp->ext_txcb_dis = sc->flags & FXP_FLAG_EXT_TXCB ? 0 : 1; 1329 cbp->ext_stats_dis = 1; /* disable extended counters */ 1330 cbp->keep_overrun_rx = 0; /* don't pass overrun frames to host */ 1331 cbp->save_bf = prm; /* save bad frames */ 1332 cbp->disc_short_rx = !prm; /* discard short packets */ 1333 cbp->underrun_retry = 1; /* retry mode (once) on DMA underrun */ 1334 cbp->two_frames = 0; /* do not limit FIFO to 2 frames */ 1335 cbp->dyn_tbd = 0; /* (no) dynamic TBD mode */ 1336 cbp->mediatype = sc->flags & FXP_FLAG_SERIAL_MEDIA ? 0 : 1; 1337 cbp->csma_dis = 0; /* (don't) disable link */ 1338 cbp->tcp_udp_cksum = 0; /* (don't) enable checksum */ 1339 cbp->vlan_tco = 0; /* (don't) enable vlan wakeup */ 1340 cbp->link_wake_en = 0; /* (don't) assert PME# on link change */ 1341 cbp->arp_wake_en = 0; /* (don't) assert PME# on arp */ 1342 cbp->mc_wake_en = 0; /* (don't) enable PME# on mcmatch */ 1343 cbp->nsai = 1; /* (don't) disable source addr insert */ 1344 cbp->preamble_length = 2; /* (7 byte) preamble */ 1345 cbp->loopback = 0; /* (don't) loopback */ 1346 cbp->linear_priority = 0; /* (normal CSMA/CD operation) */ 1347 cbp->linear_pri_mode = 0; /* (wait after xmit only) */ 1348 cbp->interfrm_spacing = 6; /* (96 bits of) interframe spacing */ 1349 cbp->promiscuous = prm; /* promiscuous mode */ 1350 cbp->bcast_disable = 0; /* (don't) disable broadcasts */ 1351 cbp->wait_after_win = 0; /* (don't) enable modified backoff alg*/ 1352 cbp->ignore_ul = 0; /* consider U/L bit in IA matching */ 1353 cbp->crc16_en = 0; /* (don't) enable crc-16 algorithm */ 1354 cbp->crscdt = sc->flags & FXP_FLAG_SERIAL_MEDIA ? 1 : 0; 1355
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1331 /*
1332 * we may want to move all FC stuff to a separate section.
1333 * the values here are 82557 compatible.
1334 */
1335 cbp->fc_delay_lsb = 0;
1336 cbp->fc_delay_msb = 0x40;
1337 cbp->pri_fc_thresh = 0x03;
1338 cbp->tx_fc_dis = 0; /* (don't) disable transmit FC */
1339 cbp->rx_fc_restop = 0; /* (don't) enable FC stop frame */
1340 cbp->rx_fc_restart = 0; /* (don't) enable FC start frame */
1341 cbp->fc_filter = 0; /* (do) pass FC frames to host */
1342 cbp->pri_fc_loc = 1; /* location of priority in FC frame */
1343
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1356 cbp->stripping = !prm; /* truncate rx packet to byte count */ 1357 cbp->padding = 1; /* (do) pad short tx packets */ 1358 cbp->rcv_crc_xfer = 0; /* (don't) xfer CRC to host */ 1359 cbp->long_rx_en = sc->flags & FXP_FLAG_LONG_PKT_EN ? 1 : 0; 1360 cbp->ia_wake_en = 0; /* (don't) wake up on address match */ 1361 cbp->magic_pkt_dis = 0; /* (don't) disable magic packet */ 1362 /* must set wake_en in PMCSR also */ 1363 cbp->force_fdx = 0; /* (don't) force full duplex */ 1364 cbp->fdx_pin_en = 1; /* (enable) FDX# pin */ 1365 cbp->multi_ia = 0; /* (don't) accept multiple IAs */ 1366 cbp->mc_all = sc->flags & FXP_FLAG_ALL_MCAST ? 1 : 0; 1367
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1368 if (sc->chip == FXP_CHIP_82557) { 1369 /* 1370 * The 82557 has no hardware flow control, the values 1371 * below are the defaults for the chip. 1372 */ 1373 cbp->fc_delay_lsb = 0; 1374 cbp->fc_delay_msb = 0x40; 1375 cbp->pri_fc_thresh = 3; 1376 cbp->tx_fc_dis = 0; 1377 cbp->rx_fc_restop = 0; 1378 cbp->rx_fc_restart = 0; 1379 cbp->fc_filter = 0; 1380 cbp->pri_fc_loc = 1; 1381 } else { 1382 cbp->fc_delay_lsb = 0x1f; 1383 cbp->fc_delay_msb = 0x01; 1384 cbp->pri_fc_thresh = 3; 1385 cbp->tx_fc_dis = 0; /* enable transmit FC */ 1386 cbp->rx_fc_restop = 1; /* enable FC restop frames */ 1387 cbp->rx_fc_restart = 1; /* enable FC restart frames */ 1388 cbp->fc_filter = !prm; /* drop FC frames to host */ 1389 cbp->pri_fc_loc = 1; /* FC pri location (byte31) */ 1390 } 1391 |
1392 /* 1393 * Start the config command/DMA. 1394 */ 1395 fxp_scb_wait(sc); 1396 CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, vtophys(&cbp->cb_status)); 1397 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_START); 1398 /* ...and wait for it to complete. */ 1399 fxp_dma_wait(&cbp->cb_status, sc); 1400 1401 /* 1402 * Now initialize the station address. Temporarily use the TxCB 1403 * memory area like we did above for the config CB. 1404 */ 1405 cb_ias = (struct fxp_cb_ias *) sc->cbl_base; 1406 cb_ias->cb_status = 0; 1407 cb_ias->cb_command = FXP_CB_COMMAND_IAS | FXP_CB_COMMAND_EL; 1408 cb_ias->link_addr = -1; 1409 bcopy(sc->arpcom.ac_enaddr, 1410 (void *)(uintptr_t)(volatile void *)cb_ias->macaddr, 1411 sizeof(sc->arpcom.ac_enaddr)); 1412 1413 /* 1414 * Start the IAS (Individual Address Setup) command/DMA. 1415 */ 1416 fxp_scb_wait(sc); 1417 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_START); 1418 /* ...and wait for it to complete. */ 1419 fxp_dma_wait(&cb_ias->cb_status, sc); 1420 1421 /* 1422 * Initialize transmit control block (TxCB) list. 1423 */ 1424 1425 txp = sc->cbl_base; 1426 bzero(txp, sizeof(struct fxp_cb_tx) * FXP_NTXCB); 1427 for (i = 0; i < FXP_NTXCB; i++) { 1428 txp[i].cb_status = FXP_CB_STATUS_C | FXP_CB_STATUS_OK; 1429 txp[i].cb_command = FXP_CB_COMMAND_NOP;
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1394 txp[i].link_addr = vtophys(&txp[(i + 1) & FXP_TXCB_MASK].cb_status);
1395 txp[i].tbd_array_addr = vtophys(&txp[i].tbd[0]);
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1430 txp[i].link_addr = 1431 vtophys(&txp[(i + 1) & FXP_TXCB_MASK].cb_status); 1432 if (sc->flags & FXP_FLAG_EXT_TXCB) 1433 txp[i].tbd_array_addr = vtophys(&txp[i].tbd[2]); 1434 else 1435 txp[i].tbd_array_addr = vtophys(&txp[i].tbd[0]); |
1436 txp[i].next = &txp[(i + 1) & FXP_TXCB_MASK]; 1437 } 1438 /* 1439 * Set the suspend flag on the first TxCB and start the control 1440 * unit. It will execute the NOP and then suspend. 1441 */ 1442 txp->cb_command = FXP_CB_COMMAND_NOP | FXP_CB_COMMAND_S; 1443 sc->cbl_first = sc->cbl_last = txp; 1444 sc->tx_queued = 1; 1445 1446 fxp_scb_wait(sc); 1447 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_START); 1448 1449 /* 1450 * Initialize receiver buffer area - RFA. 1451 */ 1452 fxp_scb_wait(sc); 1453 CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, 1454 vtophys(sc->rfa_headm->m_ext.ext_buf) + RFA_ALIGNMENT_FUDGE); 1455 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_RU_START); 1456 1457 /* 1458 * Set current media. 1459 */ 1460 if (sc->miibus != NULL) 1461 mii_mediachg(device_get_softc(sc->miibus)); 1462 1463 ifp->if_flags |= IFF_RUNNING; 1464 ifp->if_flags &= ~IFF_OACTIVE; 1465 splx(s); 1466 1467 /* 1468 * Start stats updater. 1469 */ 1470 sc->stat_ch = timeout(fxp_tick, sc, hz); 1471} 1472 1473static int 1474fxp_serial_ifmedia_upd(struct ifnet *ifp) 1475{ 1476 1477 return (0); 1478} 1479 1480static void 1481fxp_serial_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 1482{ 1483 1484 ifmr->ifm_active = IFM_ETHER|IFM_MANUAL; 1485} 1486 1487/* 1488 * Change media according to request. 1489 */ 1490static int 1491fxp_ifmedia_upd(struct ifnet *ifp) 1492{ 1493 struct fxp_softc *sc = ifp->if_softc; 1494 struct mii_data *mii; 1495 1496 mii = device_get_softc(sc->miibus); 1497 mii_mediachg(mii); 1498 return (0); 1499} 1500 1501/* 1502 * Notify the world which media we're using. 1503 */ 1504static void 1505fxp_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 1506{ 1507 struct fxp_softc *sc = ifp->if_softc; 1508 struct mii_data *mii; 1509 1510 mii = device_get_softc(sc->miibus); 1511 mii_pollstat(mii); 1512 ifmr->ifm_active = mii->mii_media_active; 1513 ifmr->ifm_status = mii->mii_media_status; 1514} 1515 1516/* 1517 * Add a buffer to the end of the RFA buffer list. 1518 * Return 0 if successful, 1 for failure. A failure results in 1519 * adding the 'oldm' (if non-NULL) on to the end of the list - 1520 * tossing out its old contents and recycling it. 1521 * The RFA struct is stuck at the beginning of mbuf cluster and the 1522 * data pointer is fixed up to point just past it. 1523 */ 1524static int 1525fxp_add_rfabuf(struct fxp_softc *sc, struct mbuf *oldm) 1526{ 1527 u_int32_t v; 1528 struct mbuf *m; 1529 struct fxp_rfa *rfa, *p_rfa; 1530 1531 MGETHDR(m, M_DONTWAIT, MT_DATA); 1532 if (m != NULL) { 1533 MCLGET(m, M_DONTWAIT); 1534 if ((m->m_flags & M_EXT) == 0) { 1535 m_freem(m); 1536 if (oldm == NULL) 1537 return 1; 1538 m = oldm; 1539 m->m_data = m->m_ext.ext_buf; 1540 } 1541 } else { 1542 if (oldm == NULL) 1543 return 1; 1544 m = oldm; 1545 m->m_data = m->m_ext.ext_buf; 1546 } 1547 1548 /* 1549 * Move the data pointer up so that the incoming data packet 1550 * will be 32-bit aligned. 1551 */ 1552 m->m_data += RFA_ALIGNMENT_FUDGE; 1553 1554 /* 1555 * Get a pointer to the base of the mbuf cluster and move 1556 * data start past it. 1557 */ 1558 rfa = mtod(m, struct fxp_rfa *); 1559 m->m_data += sizeof(struct fxp_rfa); 1560 rfa->size = (u_int16_t)(MCLBYTES - sizeof(struct fxp_rfa) - RFA_ALIGNMENT_FUDGE); 1561 1562 /* 1563 * Initialize the rest of the RFA. Note that since the RFA 1564 * is misaligned, we cannot store values directly. Instead, 1565 * we use an optimized, inline copy. 1566 */ 1567 1568 rfa->rfa_status = 0; 1569 rfa->rfa_control = FXP_RFA_CONTROL_EL; 1570 rfa->actual_size = 0; 1571 1572 v = -1; 1573 fxp_lwcopy(&v, (volatile u_int32_t *) rfa->link_addr); 1574 fxp_lwcopy(&v, (volatile u_int32_t *) rfa->rbd_addr); 1575 1576 /* 1577 * If there are other buffers already on the list, attach this 1578 * one to the end by fixing up the tail to point to this one. 1579 */ 1580 if (sc->rfa_headm != NULL) { 1581 p_rfa = (struct fxp_rfa *) (sc->rfa_tailm->m_ext.ext_buf + 1582 RFA_ALIGNMENT_FUDGE); 1583 sc->rfa_tailm->m_next = m; 1584 v = vtophys(rfa); 1585 fxp_lwcopy(&v, (volatile u_int32_t *) p_rfa->link_addr); 1586 p_rfa->rfa_control = 0; 1587 } else { 1588 sc->rfa_headm = m; 1589 } 1590 sc->rfa_tailm = m; 1591 1592 return (m == oldm); 1593} 1594 1595static volatile int 1596fxp_miibus_readreg(device_t dev, int phy, int reg) 1597{ 1598 struct fxp_softc *sc = device_get_softc(dev); 1599 int count = 10000; 1600 int value; 1601 1602 CSR_WRITE_4(sc, FXP_CSR_MDICONTROL, 1603 (FXP_MDI_READ << 26) | (reg << 16) | (phy << 21)); 1604 1605 while (((value = CSR_READ_4(sc, FXP_CSR_MDICONTROL)) & 0x10000000) == 0 1606 && count--) 1607 DELAY(10); 1608 1609 if (count <= 0) 1610 device_printf(dev, "fxp_miibus_readreg: timed out\n"); 1611 1612 return (value & 0xffff); 1613} 1614 1615static void 1616fxp_miibus_writereg(device_t dev, int phy, int reg, int value) 1617{ 1618 struct fxp_softc *sc = device_get_softc(dev); 1619 int count = 10000; 1620 1621 CSR_WRITE_4(sc, FXP_CSR_MDICONTROL, 1622 (FXP_MDI_WRITE << 26) | (reg << 16) | (phy << 21) | 1623 (value & 0xffff)); 1624 1625 while ((CSR_READ_4(sc, FXP_CSR_MDICONTROL) & 0x10000000) == 0 && 1626 count--) 1627 DELAY(10); 1628 1629 if (count <= 0) 1630 device_printf(dev, "fxp_miibus_writereg: timed out\n"); 1631} 1632 1633static int 1634fxp_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 1635{ 1636 struct fxp_softc *sc = ifp->if_softc; 1637 struct ifreq *ifr = (struct ifreq *)data; 1638 struct mii_data *mii; 1639 int s, error = 0; 1640 1641 s = splimp(); 1642 1643 switch (command) { 1644 case SIOCSIFADDR: 1645 case SIOCGIFADDR: 1646 case SIOCSIFMTU: 1647 error = ether_ioctl(ifp, command, data); 1648 break; 1649 1650 case SIOCSIFFLAGS: 1651 if (ifp->if_flags & IFF_ALLMULTI) 1652 sc->flags |= FXP_FLAG_ALL_MCAST; 1653 else 1654 sc->flags &= ~FXP_FLAG_ALL_MCAST; 1655 1656 /* 1657 * If interface is marked up and not running, then start it. 1658 * If it is marked down and running, stop it. 1659 * XXX If it's up then re-initialize it. This is so flags 1660 * such as IFF_PROMISC are handled. 1661 */ 1662 if (ifp->if_flags & IFF_UP) { 1663 fxp_init(sc); 1664 } else { 1665 if (ifp->if_flags & IFF_RUNNING) 1666 fxp_stop(sc); 1667 } 1668 break; 1669 1670 case SIOCADDMULTI: 1671 case SIOCDELMULTI: 1672 if (ifp->if_flags & IFF_ALLMULTI) 1673 sc->flags |= FXP_FLAG_ALL_MCAST; 1674 else 1675 sc->flags &= ~FXP_FLAG_ALL_MCAST; 1676 /* 1677 * Multicast list has changed; set the hardware filter 1678 * accordingly. 1679 */ 1680 if ((sc->flags & FXP_FLAG_ALL_MCAST) == 0) 1681 fxp_mc_setup(sc); 1682 /* 1683 * fxp_mc_setup() can set FXP_FLAG_ALL_MCAST, so check it 1684 * again rather than else {}. 1685 */ 1686 if (sc->flags & FXP_FLAG_ALL_MCAST) 1687 fxp_init(sc); 1688 error = 0; 1689 break; 1690 1691 case SIOCSIFMEDIA: 1692 case SIOCGIFMEDIA: 1693 if (sc->miibus != NULL) { 1694 mii = device_get_softc(sc->miibus); 1695 error = ifmedia_ioctl(ifp, ifr, 1696 &mii->mii_media, command); 1697 } else { 1698 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, command); 1699 } 1700 break; 1701 1702 default: 1703 error = EINVAL; 1704 } 1705 splx(s); 1706 return (error); 1707} 1708 1709/* 1710 * Program the multicast filter. 1711 * 1712 * We have an artificial restriction that the multicast setup command 1713 * must be the first command in the chain, so we take steps to ensure 1714 * this. By requiring this, it allows us to keep up the performance of 1715 * the pre-initialized command ring (esp. link pointers) by not actually 1716 * inserting the mcsetup command in the ring - i.e. its link pointer 1717 * points to the TxCB ring, but the mcsetup descriptor itself is not part 1718 * of it. We then can do 'CU_START' on the mcsetup descriptor and have it 1719 * lead into the regular TxCB ring when it completes. 1720 * 1721 * This function must be called at splimp. 1722 */ 1723static void 1724fxp_mc_setup(struct fxp_softc *sc) 1725{ 1726 struct fxp_cb_mcs *mcsp = sc->mcsp; 1727 struct ifnet *ifp = &sc->sc_if; 1728 struct ifmultiaddr *ifma; 1729 int nmcasts; 1730 int count; 1731 1732 /* 1733 * If there are queued commands, we must wait until they are all 1734 * completed. If we are already waiting, then add a NOP command 1735 * with interrupt option so that we're notified when all commands 1736 * have been completed - fxp_start() ensures that no additional 1737 * TX commands will be added when need_mcsetup is true. 1738 */ 1739 if (sc->tx_queued) { 1740 struct fxp_cb_tx *txp; 1741 1742 /* 1743 * need_mcsetup will be true if we are already waiting for the 1744 * NOP command to be completed (see below). In this case, bail. 1745 */ 1746 if (sc->need_mcsetup) 1747 return; 1748 sc->need_mcsetup = 1; 1749 1750 /* 1751 * Add a NOP command with interrupt so that we are notified when all 1752 * TX commands have been processed. 1753 */ 1754 txp = sc->cbl_last->next; 1755 txp->mb_head = NULL; 1756 txp->cb_status = 0; 1757 txp->cb_command = FXP_CB_COMMAND_NOP | FXP_CB_COMMAND_S | FXP_CB_COMMAND_I; 1758 /* 1759 * Advance the end of list forward. 1760 */ 1761 sc->cbl_last->cb_command &= ~FXP_CB_COMMAND_S; 1762 sc->cbl_last = txp; 1763 sc->tx_queued++; 1764 /* 1765 * Issue a resume in case the CU has just suspended. 1766 */ 1767 fxp_scb_wait(sc); 1768 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_RESUME); 1769 /* 1770 * Set a 5 second timer just in case we don't hear from the 1771 * card again. 1772 */ 1773 ifp->if_timer = 5; 1774 1775 return; 1776 } 1777 sc->need_mcsetup = 0; 1778 1779 /* 1780 * Initialize multicast setup descriptor. 1781 */ 1782 mcsp->next = sc->cbl_base; 1783 mcsp->mb_head = NULL; 1784 mcsp->cb_status = 0; 1785 mcsp->cb_command = FXP_CB_COMMAND_MCAS | FXP_CB_COMMAND_S | FXP_CB_COMMAND_I; 1786 mcsp->link_addr = vtophys(&sc->cbl_base->cb_status); 1787 1788 nmcasts = 0; 1789 if ((sc->flags & FXP_FLAG_ALL_MCAST) == 0) { 1790#if __FreeBSD_version < 500000 1791 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1792#else 1793 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1794#endif 1795 if (ifma->ifma_addr->sa_family != AF_LINK) 1796 continue; 1797 if (nmcasts >= MAXMCADDR) { 1798 sc->flags |= FXP_FLAG_ALL_MCAST; 1799 nmcasts = 0; 1800 break; 1801 } 1802 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1803 (void *)(uintptr_t)(volatile void *) 1804 &sc->mcsp->mc_addr[nmcasts][0], 6); 1805 nmcasts++; 1806 } 1807 } 1808 mcsp->mc_cnt = nmcasts * 6; 1809 sc->cbl_first = sc->cbl_last = (struct fxp_cb_tx *) mcsp; 1810 sc->tx_queued = 1; 1811 1812 /* 1813 * Wait until command unit is not active. This should never 1814 * be the case when nothing is queued, but make sure anyway. 1815 */ 1816 count = 100; 1817 while ((CSR_READ_1(sc, FXP_CSR_SCB_RUSCUS) >> 6) == 1818 FXP_SCB_CUS_ACTIVE && --count) 1819 DELAY(10); 1820 if (count == 0) { 1821 device_printf(sc->dev, "command queue timeout\n"); 1822 return; 1823 } 1824 1825 /* 1826 * Start the multicast setup command. 1827 */ 1828 fxp_scb_wait(sc); 1829 CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, vtophys(&mcsp->cb_status)); 1830 CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_START); 1831 1832 ifp->if_timer = 2; 1833 return; 1834}
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