if_pcn.c revision 151297
1/*- 2 * Copyright (c) 2000 Berkeley Software Design, Inc. 3 * Copyright (c) 1997, 1998, 1999, 2000 4 * Bill Paul <wpaul@osd.bsdi.com>. 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, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Bill Paul. 17 * 4. Neither the name of the author nor the names of any co-contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 31 * THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#include <sys/cdefs.h> 35__FBSDID("$FreeBSD: head/sys/pci/if_pcn.c 151297 2005-10-13 21:11:20Z ru $"); 36 37/* 38 * AMD Am79c972 fast ethernet PCI NIC driver. Datasheets are available 39 * from http://www.amd.com. 40 * 41 * The AMD PCnet/PCI controllers are more advanced and functional 42 * versions of the venerable 7990 LANCE. The PCnet/PCI chips retain 43 * backwards compatibility with the LANCE and thus can be made 44 * to work with older LANCE drivers. This is in fact how the 45 * PCnet/PCI chips were supported in FreeBSD originally. The trouble 46 * is that the PCnet/PCI devices offer several performance enhancements 47 * which can't be exploited in LANCE compatibility mode. Chief among 48 * these enhancements is the ability to perform PCI DMA operations 49 * using 32-bit addressing (which eliminates the need for ISA 50 * bounce-buffering), and special receive buffer alignment (which 51 * allows the receive handler to pass packets to the upper protocol 52 * layers without copying on both the x86 and alpha platforms). 53 */ 54 55#include <sys/param.h> 56#include <sys/systm.h> 57#include <sys/sockio.h> 58#include <sys/mbuf.h> 59#include <sys/malloc.h> 60#include <sys/kernel.h> 61#include <sys/module.h> 62#include <sys/socket.h> 63 64#include <net/if.h> 65#include <net/if_arp.h> 66#include <net/ethernet.h> 67#include <net/if_dl.h> 68#include <net/if_media.h> 69#include <net/if_types.h> 70 71#include <net/bpf.h> 72 73#include <vm/vm.h> /* for vtophys */ 74#include <vm/pmap.h> /* for vtophys */ 75#include <machine/bus.h> 76#include <machine/resource.h> 77#include <sys/bus.h> 78#include <sys/rman.h> 79 80#include <dev/mii/mii.h> 81#include <dev/mii/miivar.h> 82 83#include <dev/pci/pcireg.h> 84#include <dev/pci/pcivar.h> 85 86#define PCN_USEIOSPACE 87 88#include <pci/if_pcnreg.h> 89 90MODULE_DEPEND(pcn, pci, 1, 1, 1); 91MODULE_DEPEND(pcn, ether, 1, 1, 1); 92MODULE_DEPEND(pcn, miibus, 1, 1, 1); 93 94/* "device miibus" required. See GENERIC if you get errors here. */ 95#include "miibus_if.h" 96 97/* 98 * Various supported device vendors/types and their names. 99 */ 100static struct pcn_type pcn_devs[] = { 101 { PCN_VENDORID, PCN_DEVICEID_PCNET, "AMD PCnet/PCI 10/100BaseTX" }, 102 { PCN_VENDORID, PCN_DEVICEID_HOME, "AMD PCnet/Home HomePNA" }, 103 { 0, 0, NULL } 104}; 105 106static struct pcn_chipid { 107 u_int32_t id; 108 char * name; 109} pcn_chipid[] = { 110 { Am79C960, "Am79C960" }, 111 { Am79C961, "Am79C961" }, 112 { Am79C961A, "Am79C961A" }, 113 { Am79C965, "Am79C965" }, 114 { Am79C970, "Am79C970" }, 115 { Am79C970A, "Am79C970A" }, 116 { Am79C971, "Am79C971" }, 117 { Am79C972, "Am79C972" }, 118 { Am79C973, "Am79C973" }, 119 { Am79C978, "Am79C978" }, 120 { Am79C975, "Am79C975" }, 121 { Am79C976, "Am79C976" }, 122 { 0, NULL }, 123}; 124 125static char * pcn_chipid_name(u_int32_t); 126static u_int32_t pcn_chip_id(device_t); 127 128static u_int32_t pcn_csr_read(struct pcn_softc *, int); 129static u_int16_t pcn_csr_read16(struct pcn_softc *, int); 130static u_int16_t pcn_bcr_read16(struct pcn_softc *, int); 131static void pcn_csr_write(struct pcn_softc *, int, int); 132static u_int32_t pcn_bcr_read(struct pcn_softc *, int); 133static void pcn_bcr_write(struct pcn_softc *, int, int); 134 135static int pcn_probe(device_t); 136static int pcn_attach(device_t); 137static int pcn_detach(device_t); 138 139static int pcn_newbuf(struct pcn_softc *, int, struct mbuf *); 140static int pcn_encap(struct pcn_softc *, struct mbuf *, u_int32_t *); 141static void pcn_rxeof(struct pcn_softc *); 142static void pcn_txeof(struct pcn_softc *); 143static void pcn_intr(void *); 144static void pcn_tick(void *); 145static void pcn_start(struct ifnet *); 146static void pcn_start_locked(struct ifnet *); 147static int pcn_ioctl(struct ifnet *, u_long, caddr_t); 148static void pcn_init(void *); 149static void pcn_init_locked(struct pcn_softc *); 150static void pcn_stop(struct pcn_softc *); 151static void pcn_watchdog(struct ifnet *); 152static void pcn_shutdown(device_t); 153static int pcn_ifmedia_upd(struct ifnet *); 154static void pcn_ifmedia_sts(struct ifnet *, struct ifmediareq *); 155 156static int pcn_miibus_readreg(device_t, int, int); 157static int pcn_miibus_writereg(device_t, int, int, int); 158static void pcn_miibus_statchg(device_t); 159 160static void pcn_setfilt(struct ifnet *); 161static void pcn_setmulti(struct pcn_softc *); 162static void pcn_reset(struct pcn_softc *); 163static int pcn_list_rx_init(struct pcn_softc *); 164static int pcn_list_tx_init(struct pcn_softc *); 165 166#ifdef PCN_USEIOSPACE 167#define PCN_RES SYS_RES_IOPORT 168#define PCN_RID PCN_PCI_LOIO 169#else 170#define PCN_RES SYS_RES_MEMORY 171#define PCN_RID PCN_PCI_LOMEM 172#endif 173 174static device_method_t pcn_methods[] = { 175 /* Device interface */ 176 DEVMETHOD(device_probe, pcn_probe), 177 DEVMETHOD(device_attach, pcn_attach), 178 DEVMETHOD(device_detach, pcn_detach), 179 DEVMETHOD(device_shutdown, pcn_shutdown), 180 181 /* bus interface */ 182 DEVMETHOD(bus_print_child, bus_generic_print_child), 183 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 184 185 /* MII interface */ 186 DEVMETHOD(miibus_readreg, pcn_miibus_readreg), 187 DEVMETHOD(miibus_writereg, pcn_miibus_writereg), 188 DEVMETHOD(miibus_statchg, pcn_miibus_statchg), 189 190 { 0, 0 } 191}; 192 193static driver_t pcn_driver = { 194 "pcn", 195 pcn_methods, 196 sizeof(struct pcn_softc) 197}; 198 199static devclass_t pcn_devclass; 200 201DRIVER_MODULE(pcn, pci, pcn_driver, pcn_devclass, 0, 0); 202DRIVER_MODULE(miibus, pcn, miibus_driver, miibus_devclass, 0, 0); 203 204#define PCN_CSR_SETBIT(sc, reg, x) \ 205 pcn_csr_write(sc, reg, pcn_csr_read(sc, reg) | (x)) 206 207#define PCN_CSR_CLRBIT(sc, reg, x) \ 208 pcn_csr_write(sc, reg, pcn_csr_read(sc, reg) & ~(x)) 209 210#define PCN_BCR_SETBIT(sc, reg, x) \ 211 pcn_bcr_write(sc, reg, pcn_bcr_read(sc, reg) | (x)) 212 213#define PCN_BCR_CLRBIT(sc, reg, x) \ 214 pcn_bcr_write(sc, reg, pcn_bcr_read(sc, reg) & ~(x)) 215 216static u_int32_t 217pcn_csr_read(sc, reg) 218 struct pcn_softc *sc; 219 int reg; 220{ 221 CSR_WRITE_4(sc, PCN_IO32_RAP, reg); 222 return(CSR_READ_4(sc, PCN_IO32_RDP)); 223} 224 225static u_int16_t 226pcn_csr_read16(sc, reg) 227 struct pcn_softc *sc; 228 int reg; 229{ 230 CSR_WRITE_2(sc, PCN_IO16_RAP, reg); 231 return(CSR_READ_2(sc, PCN_IO16_RDP)); 232} 233 234static void 235pcn_csr_write(sc, reg, val) 236 struct pcn_softc *sc; 237 int reg; 238 int val; 239{ 240 CSR_WRITE_4(sc, PCN_IO32_RAP, reg); 241 CSR_WRITE_4(sc, PCN_IO32_RDP, val); 242 return; 243} 244 245static u_int32_t 246pcn_bcr_read(sc, reg) 247 struct pcn_softc *sc; 248 int reg; 249{ 250 CSR_WRITE_4(sc, PCN_IO32_RAP, reg); 251 return(CSR_READ_4(sc, PCN_IO32_BDP)); 252} 253 254static u_int16_t 255pcn_bcr_read16(sc, reg) 256 struct pcn_softc *sc; 257 int reg; 258{ 259 CSR_WRITE_2(sc, PCN_IO16_RAP, reg); 260 return(CSR_READ_2(sc, PCN_IO16_BDP)); 261} 262 263static void 264pcn_bcr_write(sc, reg, val) 265 struct pcn_softc *sc; 266 int reg; 267 int val; 268{ 269 CSR_WRITE_4(sc, PCN_IO32_RAP, reg); 270 CSR_WRITE_4(sc, PCN_IO32_BDP, val); 271 return; 272} 273 274static int 275pcn_miibus_readreg(dev, phy, reg) 276 device_t dev; 277 int phy, reg; 278{ 279 struct pcn_softc *sc; 280 int val; 281 282 sc = device_get_softc(dev); 283 284 if (sc->pcn_phyaddr && phy > sc->pcn_phyaddr) 285 return(0); 286 287 pcn_bcr_write(sc, PCN_BCR_MIIADDR, reg | (phy << 5)); 288 val = pcn_bcr_read(sc, PCN_BCR_MIIDATA) & 0xFFFF; 289 if (val == 0xFFFF) 290 return(0); 291 292 sc->pcn_phyaddr = phy; 293 294 return(val); 295} 296 297static int 298pcn_miibus_writereg(dev, phy, reg, data) 299 device_t dev; 300 int phy, reg, data; 301{ 302 struct pcn_softc *sc; 303 304 sc = device_get_softc(dev); 305 306 pcn_bcr_write(sc, PCN_BCR_MIIADDR, reg | (phy << 5)); 307 pcn_bcr_write(sc, PCN_BCR_MIIDATA, data); 308 309 return(0); 310} 311 312static void 313pcn_miibus_statchg(dev) 314 device_t dev; 315{ 316 struct pcn_softc *sc; 317 struct mii_data *mii; 318 319 sc = device_get_softc(dev); 320 mii = device_get_softc(sc->pcn_miibus); 321 322 if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) { 323 PCN_BCR_SETBIT(sc, PCN_BCR_DUPLEX, PCN_DUPLEX_FDEN); 324 } else { 325 PCN_BCR_CLRBIT(sc, PCN_BCR_DUPLEX, PCN_DUPLEX_FDEN); 326 } 327 328 return; 329} 330 331static void 332pcn_setmulti(sc) 333 struct pcn_softc *sc; 334{ 335 struct ifnet *ifp; 336 struct ifmultiaddr *ifma; 337 u_int32_t h, i; 338 u_int16_t hashes[4] = { 0, 0, 0, 0 }; 339 340 ifp = sc->pcn_ifp; 341 342 PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); 343 344 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { 345 for (i = 0; i < 4; i++) 346 pcn_csr_write(sc, PCN_CSR_MAR0 + i, 0xFFFF); 347 PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); 348 return; 349 } 350 351 /* first, zot all the existing hash bits */ 352 for (i = 0; i < 4; i++) 353 pcn_csr_write(sc, PCN_CSR_MAR0 + i, 0); 354 355 /* now program new ones */ 356 IF_ADDR_LOCK(ifp); 357 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 358 if (ifma->ifma_addr->sa_family != AF_LINK) 359 continue; 360 h = ether_crc32_le(LLADDR((struct sockaddr_dl *) 361 ifma->ifma_addr), ETHER_ADDR_LEN) >> 26; 362 hashes[h >> 4] |= 1 << (h & 0xF); 363 } 364 IF_ADDR_UNLOCK(ifp); 365 366 for (i = 0; i < 4; i++) 367 pcn_csr_write(sc, PCN_CSR_MAR0 + i, hashes[i]); 368 369 PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); 370 371 return; 372} 373 374static void 375pcn_reset(sc) 376 struct pcn_softc *sc; 377{ 378 /* 379 * Issue a reset by reading from the RESET register. 380 * Note that we don't know if the chip is operating in 381 * 16-bit or 32-bit mode at this point, so we attempt 382 * to reset the chip both ways. If one fails, the other 383 * will succeed. 384 */ 385 CSR_READ_2(sc, PCN_IO16_RESET); 386 CSR_READ_4(sc, PCN_IO32_RESET); 387 388 /* Wait a little while for the chip to get its brains in order. */ 389 DELAY(1000); 390 391 /* Select 32-bit (DWIO) mode */ 392 CSR_WRITE_4(sc, PCN_IO32_RDP, 0); 393 394 /* Select software style 3. */ 395 pcn_bcr_write(sc, PCN_BCR_SSTYLE, PCN_SWSTYLE_PCNETPCI_BURST); 396 397 return; 398} 399 400static char * 401pcn_chipid_name (u_int32_t id) 402{ 403 struct pcn_chipid *p = pcn_chipid; 404 405 while (p->name) { 406 if (id == p->id) 407 return (p->name); 408 p++; 409 } 410 return ("Unknown"); 411} 412 413static u_int32_t 414pcn_chip_id (device_t dev) 415{ 416 struct pcn_softc *sc; 417 u_int32_t chip_id; 418 419 sc = device_get_softc(dev); 420 /* 421 * Note: we can *NOT* put the chip into 422 * 32-bit mode yet. The lnc driver will only 423 * work in 16-bit mode, and once the chip 424 * goes into 32-bit mode, the only way to 425 * get it out again is with a hardware reset. 426 * So if pcn_probe() is called before the 427 * lnc driver's probe routine, the chip will 428 * be locked into 32-bit operation and the lnc 429 * driver will be unable to attach to it. 430 * Note II: if the chip happens to already 431 * be in 32-bit mode, we still need to check 432 * the chip ID, but first we have to detect 433 * 32-bit mode using only 16-bit operations. 434 * The safest way to do this is to read the 435 * PCI subsystem ID from BCR23/24 and compare 436 * that with the value read from PCI config 437 * space. 438 */ 439 chip_id = pcn_bcr_read16(sc, PCN_BCR_PCISUBSYSID); 440 chip_id <<= 16; 441 chip_id |= pcn_bcr_read16(sc, PCN_BCR_PCISUBVENID); 442 /* 443 * Note III: the test for 0x10001000 is a hack to 444 * pacify VMware, who's pseudo-PCnet interface is 445 * broken. Reading the subsystem register from PCI 446 * config space yields 0x00000000 while reading the 447 * same value from I/O space yields 0x10001000. It's 448 * not supposed to be that way. 449 */ 450 if (chip_id == pci_read_config(dev, 451 PCIR_SUBVEND_0, 4) || chip_id == 0x10001000) { 452 /* We're in 16-bit mode. */ 453 chip_id = pcn_csr_read16(sc, PCN_CSR_CHIPID1); 454 chip_id <<= 16; 455 chip_id |= pcn_csr_read16(sc, PCN_CSR_CHIPID0); 456 } else { 457 /* We're in 32-bit mode. */ 458 chip_id = pcn_csr_read(sc, PCN_CSR_CHIPID1); 459 chip_id <<= 16; 460 chip_id |= pcn_csr_read(sc, PCN_CSR_CHIPID0); 461 } 462 463 return (chip_id); 464} 465 466static struct pcn_type * 467pcn_match (u_int16_t vid, u_int16_t did) 468{ 469 struct pcn_type *t; 470 t = pcn_devs; 471 472 while(t->pcn_name != NULL) { 473 if ((vid == t->pcn_vid) && (did == t->pcn_did)) 474 return (t); 475 t++; 476 } 477 return (NULL); 478} 479 480/* 481 * Probe for an AMD chip. Check the PCI vendor and device 482 * IDs against our list and return a device name if we find a match. 483 */ 484static int 485pcn_probe(dev) 486 device_t dev; 487{ 488 struct pcn_type *t; 489 struct pcn_softc *sc; 490 int rid; 491 u_int32_t chip_id; 492 493 t = pcn_match(pci_get_vendor(dev), pci_get_device(dev)); 494 if (t == NULL) 495 return (ENXIO); 496 sc = device_get_softc(dev); 497 498 /* 499 * Temporarily map the I/O space so we can read the chip ID register. 500 */ 501 rid = PCN_RID; 502 sc->pcn_res = bus_alloc_resource_any(dev, PCN_RES, &rid, RF_ACTIVE); 503 if (sc->pcn_res == NULL) { 504 device_printf(dev, "couldn't map ports/memory\n"); 505 return(ENXIO); 506 } 507 sc->pcn_btag = rman_get_bustag(sc->pcn_res); 508 sc->pcn_bhandle = rman_get_bushandle(sc->pcn_res); 509 510 chip_id = pcn_chip_id(dev); 511 512 bus_release_resource(dev, PCN_RES, PCN_RID, sc->pcn_res); 513 514 switch((chip_id >> 12) & PART_MASK) { 515 case Am79C971: 516 case Am79C972: 517 case Am79C973: 518 case Am79C975: 519 case Am79C976: 520 case Am79C978: 521 break; 522 default: 523 return(ENXIO); 524 } 525 device_set_desc(dev, t->pcn_name); 526 return(BUS_PROBE_DEFAULT); 527} 528 529/* 530 * Attach the interface. Allocate softc structures, do ifmedia 531 * setup and ethernet/BPF attach. 532 */ 533static int 534pcn_attach(dev) 535 device_t dev; 536{ 537 u_int32_t eaddr[2]; 538 struct pcn_softc *sc; 539 struct ifnet *ifp; 540 int unit, error = 0, rid; 541 542 sc = device_get_softc(dev); 543 unit = device_get_unit(dev); 544 545 /* Initialize our mutex. */ 546 mtx_init(&sc->pcn_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 547 MTX_DEF); 548 /* 549 * Map control/status registers. 550 */ 551 pci_enable_busmaster(dev); 552 553 /* Retrieve the chip ID */ 554 sc->pcn_type = (pcn_chip_id(dev) >> 12) & PART_MASK; 555 device_printf(dev, "Chip ID %04x (%s)\n", 556 sc->pcn_type, pcn_chipid_name(sc->pcn_type)); 557 558 rid = PCN_RID; 559 sc->pcn_res = bus_alloc_resource_any(dev, PCN_RES, &rid, RF_ACTIVE); 560 561 if (sc->pcn_res == NULL) { 562 printf("pcn%d: couldn't map ports/memory\n", unit); 563 error = ENXIO; 564 goto fail; 565 } 566 567 sc->pcn_btag = rman_get_bustag(sc->pcn_res); 568 sc->pcn_bhandle = rman_get_bushandle(sc->pcn_res); 569 570 /* Allocate interrupt */ 571 rid = 0; 572 sc->pcn_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 573 RF_SHAREABLE | RF_ACTIVE); 574 575 if (sc->pcn_irq == NULL) { 576 printf("pcn%d: couldn't map interrupt\n", unit); 577 error = ENXIO; 578 goto fail; 579 } 580 581 /* Reset the adapter. */ 582 pcn_reset(sc); 583 584 /* 585 * Get station address from the EEPROM. 586 */ 587 eaddr[0] = CSR_READ_4(sc, PCN_IO32_APROM00); 588 eaddr[1] = CSR_READ_4(sc, PCN_IO32_APROM01); 589 590 sc->pcn_unit = unit; 591 callout_init_mtx(&sc->pcn_stat_callout, &sc->pcn_mtx, 0); 592 593 sc->pcn_ldata = contigmalloc(sizeof(struct pcn_list_data), M_DEVBUF, 594 M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0); 595 596 if (sc->pcn_ldata == NULL) { 597 printf("pcn%d: no memory for list buffers!\n", unit); 598 error = ENXIO; 599 goto fail; 600 } 601 bzero(sc->pcn_ldata, sizeof(struct pcn_list_data)); 602 603 ifp = sc->pcn_ifp = if_alloc(IFT_ETHER); 604 if (ifp == NULL) { 605 printf("pcn%d: can not if_alloc()\n", unit); 606 error = ENOSPC; 607 goto fail; 608 } 609 ifp->if_softc = sc; 610 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 611 ifp->if_mtu = ETHERMTU; 612 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 613 ifp->if_ioctl = pcn_ioctl; 614 ifp->if_start = pcn_start; 615 ifp->if_watchdog = pcn_watchdog; 616 ifp->if_init = pcn_init; 617 ifp->if_baudrate = 10000000; 618 ifp->if_snd.ifq_maxlen = PCN_TX_LIST_CNT - 1; 619 620 /* 621 * Do MII setup. 622 */ 623 if (mii_phy_probe(dev, &sc->pcn_miibus, 624 pcn_ifmedia_upd, pcn_ifmedia_sts)) { 625 printf("pcn%d: MII without any PHY!\n", sc->pcn_unit); 626 error = ENXIO; 627 goto fail; 628 } 629 630 /* 631 * Call MI attach routine. 632 */ 633 ether_ifattach(ifp, (u_int8_t *) eaddr); 634 635 /* Hook interrupt last to avoid having to lock softc */ 636 error = bus_setup_intr(dev, sc->pcn_irq, INTR_TYPE_NET | INTR_MPSAFE, 637 pcn_intr, sc, &sc->pcn_intrhand); 638 639 if (error) { 640 printf("pcn%d: couldn't set up irq\n", unit); 641 ether_ifdetach(ifp); 642 goto fail; 643 } 644 645fail: 646 if (error) 647 pcn_detach(dev); 648 649 return(error); 650} 651 652/* 653 * Shutdown hardware and free up resources. This can be called any 654 * time after the mutex has been initialized. It is called in both 655 * the error case in attach and the normal detach case so it needs 656 * to be careful about only freeing resources that have actually been 657 * allocated. 658 */ 659static int 660pcn_detach(dev) 661 device_t dev; 662{ 663 struct pcn_softc *sc; 664 struct ifnet *ifp; 665 666 sc = device_get_softc(dev); 667 ifp = sc->pcn_ifp; 668 669 KASSERT(mtx_initialized(&sc->pcn_mtx), ("pcn mutex not initialized")); 670 671 /* These should only be active if attach succeeded */ 672 if (device_is_attached(dev)) { 673 PCN_LOCK(sc); 674 pcn_reset(sc); 675 pcn_stop(sc); 676 PCN_UNLOCK(sc); 677 callout_drain(&sc->pcn_stat_callout); 678 ether_ifdetach(ifp); 679 } 680 if (sc->pcn_miibus) 681 device_delete_child(dev, sc->pcn_miibus); 682 bus_generic_detach(dev); 683 684 if (sc->pcn_intrhand) 685 bus_teardown_intr(dev, sc->pcn_irq, sc->pcn_intrhand); 686 if (sc->pcn_irq) 687 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->pcn_irq); 688 if (sc->pcn_res) 689 bus_release_resource(dev, PCN_RES, PCN_RID, sc->pcn_res); 690 691 if (ifp) 692 if_free(ifp); 693 694 if (sc->pcn_ldata) { 695 contigfree(sc->pcn_ldata, sizeof(struct pcn_list_data), 696 M_DEVBUF); 697 } 698 699 mtx_destroy(&sc->pcn_mtx); 700 701 return(0); 702} 703 704/* 705 * Initialize the transmit descriptors. 706 */ 707static int 708pcn_list_tx_init(sc) 709 struct pcn_softc *sc; 710{ 711 struct pcn_list_data *ld; 712 struct pcn_ring_data *cd; 713 int i; 714 715 cd = &sc->pcn_cdata; 716 ld = sc->pcn_ldata; 717 718 for (i = 0; i < PCN_TX_LIST_CNT; i++) { 719 cd->pcn_tx_chain[i] = NULL; 720 ld->pcn_tx_list[i].pcn_tbaddr = 0; 721 ld->pcn_tx_list[i].pcn_txctl = 0; 722 ld->pcn_tx_list[i].pcn_txstat = 0; 723 } 724 725 cd->pcn_tx_prod = cd->pcn_tx_cons = cd->pcn_tx_cnt = 0; 726 727 return(0); 728} 729 730 731/* 732 * Initialize the RX descriptors and allocate mbufs for them. 733 */ 734static int 735pcn_list_rx_init(sc) 736 struct pcn_softc *sc; 737{ 738 struct pcn_ring_data *cd; 739 int i; 740 741 cd = &sc->pcn_cdata; 742 743 for (i = 0; i < PCN_RX_LIST_CNT; i++) { 744 if (pcn_newbuf(sc, i, NULL) == ENOBUFS) 745 return(ENOBUFS); 746 } 747 748 cd->pcn_rx_prod = 0; 749 750 return(0); 751} 752 753/* 754 * Initialize an RX descriptor and attach an MBUF cluster. 755 */ 756static int 757pcn_newbuf(sc, idx, m) 758 struct pcn_softc *sc; 759 int idx; 760 struct mbuf *m; 761{ 762 struct mbuf *m_new = NULL; 763 struct pcn_rx_desc *c; 764 765 c = &sc->pcn_ldata->pcn_rx_list[idx]; 766 767 if (m == NULL) { 768 MGETHDR(m_new, M_DONTWAIT, MT_DATA); 769 if (m_new == NULL) 770 return(ENOBUFS); 771 772 MCLGET(m_new, M_DONTWAIT); 773 if (!(m_new->m_flags & M_EXT)) { 774 m_freem(m_new); 775 return(ENOBUFS); 776 } 777 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 778 } else { 779 m_new = m; 780 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 781 m_new->m_data = m_new->m_ext.ext_buf; 782 } 783 784 m_adj(m_new, ETHER_ALIGN); 785 786 sc->pcn_cdata.pcn_rx_chain[idx] = m_new; 787 c->pcn_rbaddr = vtophys(mtod(m_new, caddr_t)); 788 c->pcn_bufsz = (~(PCN_RXLEN) + 1) & PCN_RXLEN_BUFSZ; 789 c->pcn_bufsz |= PCN_RXLEN_MBO; 790 c->pcn_rxstat = PCN_RXSTAT_STP|PCN_RXSTAT_ENP|PCN_RXSTAT_OWN; 791 792 return(0); 793} 794 795/* 796 * A frame has been uploaded: pass the resulting mbuf chain up to 797 * the higher level protocols. 798 */ 799static void 800pcn_rxeof(sc) 801 struct pcn_softc *sc; 802{ 803 struct mbuf *m; 804 struct ifnet *ifp; 805 struct pcn_rx_desc *cur_rx; 806 int i; 807 808 PCN_LOCK_ASSERT(sc); 809 810 ifp = sc->pcn_ifp; 811 i = sc->pcn_cdata.pcn_rx_prod; 812 813 while(PCN_OWN_RXDESC(&sc->pcn_ldata->pcn_rx_list[i])) { 814 cur_rx = &sc->pcn_ldata->pcn_rx_list[i]; 815 m = sc->pcn_cdata.pcn_rx_chain[i]; 816 sc->pcn_cdata.pcn_rx_chain[i] = NULL; 817 818 /* 819 * If an error occurs, update stats, clear the 820 * status word and leave the mbuf cluster in place: 821 * it should simply get re-used next time this descriptor 822 * comes up in the ring. 823 */ 824 if (cur_rx->pcn_rxstat & PCN_RXSTAT_ERR) { 825 ifp->if_ierrors++; 826 pcn_newbuf(sc, i, m); 827 PCN_INC(i, PCN_RX_LIST_CNT); 828 continue; 829 } 830 831 if (pcn_newbuf(sc, i, NULL)) { 832 /* Ran out of mbufs; recycle this one. */ 833 pcn_newbuf(sc, i, m); 834 ifp->if_ierrors++; 835 PCN_INC(i, PCN_RX_LIST_CNT); 836 continue; 837 } 838 839 PCN_INC(i, PCN_RX_LIST_CNT); 840 841 /* No errors; receive the packet. */ 842 ifp->if_ipackets++; 843 m->m_len = m->m_pkthdr.len = 844 cur_rx->pcn_rxlen - ETHER_CRC_LEN; 845 m->m_pkthdr.rcvif = ifp; 846 847 PCN_UNLOCK(sc); 848 (*ifp->if_input)(ifp, m); 849 PCN_LOCK(sc); 850 } 851 852 sc->pcn_cdata.pcn_rx_prod = i; 853 854 return; 855} 856 857/* 858 * A frame was downloaded to the chip. It's safe for us to clean up 859 * the list buffers. 860 */ 861 862static void 863pcn_txeof(sc) 864 struct pcn_softc *sc; 865{ 866 struct pcn_tx_desc *cur_tx = NULL; 867 struct ifnet *ifp; 868 u_int32_t idx; 869 870 ifp = sc->pcn_ifp; 871 872 /* 873 * Go through our tx list and free mbufs for those 874 * frames that have been transmitted. 875 */ 876 idx = sc->pcn_cdata.pcn_tx_cons; 877 while (idx != sc->pcn_cdata.pcn_tx_prod) { 878 cur_tx = &sc->pcn_ldata->pcn_tx_list[idx]; 879 880 if (!PCN_OWN_TXDESC(cur_tx)) 881 break; 882 883 if (!(cur_tx->pcn_txctl & PCN_TXCTL_ENP)) { 884 sc->pcn_cdata.pcn_tx_cnt--; 885 PCN_INC(idx, PCN_TX_LIST_CNT); 886 continue; 887 } 888 889 if (cur_tx->pcn_txctl & PCN_TXCTL_ERR) { 890 ifp->if_oerrors++; 891 if (cur_tx->pcn_txstat & PCN_TXSTAT_EXDEF) 892 ifp->if_collisions++; 893 if (cur_tx->pcn_txstat & PCN_TXSTAT_RTRY) 894 ifp->if_collisions++; 895 } 896 897 ifp->if_collisions += 898 cur_tx->pcn_txstat & PCN_TXSTAT_TRC; 899 900 ifp->if_opackets++; 901 if (sc->pcn_cdata.pcn_tx_chain[idx] != NULL) { 902 m_freem(sc->pcn_cdata.pcn_tx_chain[idx]); 903 sc->pcn_cdata.pcn_tx_chain[idx] = NULL; 904 } 905 906 sc->pcn_cdata.pcn_tx_cnt--; 907 PCN_INC(idx, PCN_TX_LIST_CNT); 908 } 909 910 if (idx != sc->pcn_cdata.pcn_tx_cons) { 911 /* Some buffers have been freed. */ 912 sc->pcn_cdata.pcn_tx_cons = idx; 913 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 914 } 915 ifp->if_timer = (sc->pcn_cdata.pcn_tx_cnt == 0) ? 0 : 5; 916 917 return; 918} 919 920static void 921pcn_tick(xsc) 922 void *xsc; 923{ 924 struct pcn_softc *sc; 925 struct mii_data *mii; 926 struct ifnet *ifp; 927 928 sc = xsc; 929 ifp = sc->pcn_ifp; 930 PCN_LOCK_ASSERT(sc); 931 932 mii = device_get_softc(sc->pcn_miibus); 933 mii_tick(mii); 934 935 /* link just died */ 936 if (sc->pcn_link & !(mii->mii_media_status & IFM_ACTIVE)) 937 sc->pcn_link = 0; 938 939 /* link just came up, restart */ 940 if (!sc->pcn_link && mii->mii_media_status & IFM_ACTIVE && 941 IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) { 942 sc->pcn_link++; 943 if (ifp->if_snd.ifq_head != NULL) 944 pcn_start_locked(ifp); 945 } 946 947 callout_reset(&sc->pcn_stat_callout, hz, pcn_tick, sc); 948 949 return; 950} 951 952static void 953pcn_intr(arg) 954 void *arg; 955{ 956 struct pcn_softc *sc; 957 struct ifnet *ifp; 958 u_int32_t status; 959 960 sc = arg; 961 ifp = sc->pcn_ifp; 962 963 PCN_LOCK(sc); 964 965 /* Suppress unwanted interrupts */ 966 if (!(ifp->if_flags & IFF_UP)) { 967 pcn_stop(sc); 968 PCN_UNLOCK(sc); 969 return; 970 } 971 972 CSR_WRITE_4(sc, PCN_IO32_RAP, PCN_CSR_CSR); 973 974 while ((status = CSR_READ_4(sc, PCN_IO32_RDP)) & PCN_CSR_INTR) { 975 CSR_WRITE_4(sc, PCN_IO32_RDP, status); 976 977 if (status & PCN_CSR_RINT) 978 pcn_rxeof(sc); 979 980 if (status & PCN_CSR_TINT) 981 pcn_txeof(sc); 982 983 if (status & PCN_CSR_ERR) { 984 pcn_init_locked(sc); 985 break; 986 } 987 } 988 989 if (ifp->if_snd.ifq_head != NULL) 990 pcn_start_locked(ifp); 991 992 PCN_UNLOCK(sc); 993 return; 994} 995 996/* 997 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 998 * pointers to the fragment pointers. 999 */ 1000static int 1001pcn_encap(sc, m_head, txidx) 1002 struct pcn_softc *sc; 1003 struct mbuf *m_head; 1004 u_int32_t *txidx; 1005{ 1006 struct pcn_tx_desc *f = NULL; 1007 struct mbuf *m; 1008 int frag, cur, cnt = 0; 1009 1010 /* 1011 * Start packing the mbufs in this chain into 1012 * the fragment pointers. Stop when we run out 1013 * of fragments or hit the end of the mbuf chain. 1014 */ 1015 m = m_head; 1016 cur = frag = *txidx; 1017 1018 for (m = m_head; m != NULL; m = m->m_next) { 1019 if (m->m_len == 0) 1020 continue; 1021 1022 if ((PCN_TX_LIST_CNT - (sc->pcn_cdata.pcn_tx_cnt + cnt)) < 2) 1023 return(ENOBUFS); 1024 f = &sc->pcn_ldata->pcn_tx_list[frag]; 1025 f->pcn_txctl = (~(m->m_len) + 1) & PCN_TXCTL_BUFSZ; 1026 f->pcn_txctl |= PCN_TXCTL_MBO; 1027 f->pcn_tbaddr = vtophys(mtod(m, vm_offset_t)); 1028 if (cnt == 0) 1029 f->pcn_txctl |= PCN_TXCTL_STP; 1030 else 1031 f->pcn_txctl |= PCN_TXCTL_OWN; 1032 cur = frag; 1033 PCN_INC(frag, PCN_TX_LIST_CNT); 1034 cnt++; 1035 } 1036 1037 if (m != NULL) 1038 return(ENOBUFS); 1039 1040 sc->pcn_cdata.pcn_tx_chain[cur] = m_head; 1041 sc->pcn_ldata->pcn_tx_list[cur].pcn_txctl |= 1042 PCN_TXCTL_ENP|PCN_TXCTL_ADD_FCS|PCN_TXCTL_MORE_LTINT; 1043 sc->pcn_ldata->pcn_tx_list[*txidx].pcn_txctl |= PCN_TXCTL_OWN; 1044 sc->pcn_cdata.pcn_tx_cnt += cnt; 1045 *txidx = frag; 1046 1047 return(0); 1048} 1049 1050/* 1051 * Main transmit routine. To avoid having to do mbuf copies, we put pointers 1052 * to the mbuf data regions directly in the transmit lists. We also save a 1053 * copy of the pointers since the transmit list fragment pointers are 1054 * physical addresses. 1055 */ 1056static void 1057pcn_start(ifp) 1058 struct ifnet *ifp; 1059{ 1060 struct pcn_softc *sc; 1061 1062 sc = ifp->if_softc; 1063 PCN_LOCK(sc); 1064 pcn_start_locked(ifp); 1065 PCN_UNLOCK(sc); 1066} 1067 1068static void 1069pcn_start_locked(ifp) 1070 struct ifnet *ifp; 1071{ 1072 struct pcn_softc *sc; 1073 struct mbuf *m_head = NULL; 1074 u_int32_t idx; 1075 1076 sc = ifp->if_softc; 1077 1078 PCN_LOCK_ASSERT(sc); 1079 1080 if (!sc->pcn_link) 1081 return; 1082 1083 idx = sc->pcn_cdata.pcn_tx_prod; 1084 1085 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) 1086 return; 1087 1088 while(sc->pcn_cdata.pcn_tx_chain[idx] == NULL) { 1089 IF_DEQUEUE(&ifp->if_snd, m_head); 1090 if (m_head == NULL) 1091 break; 1092 1093 if (pcn_encap(sc, m_head, &idx)) { 1094 IF_PREPEND(&ifp->if_snd, m_head); 1095 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1096 break; 1097 } 1098 1099 /* 1100 * If there's a BPF listener, bounce a copy of this frame 1101 * to him. 1102 */ 1103 BPF_MTAP(ifp, m_head); 1104 1105 } 1106 1107 /* Transmit */ 1108 sc->pcn_cdata.pcn_tx_prod = idx; 1109 pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_TX|PCN_CSR_INTEN); 1110 1111 /* 1112 * Set a timeout in case the chip goes out to lunch. 1113 */ 1114 ifp->if_timer = 5; 1115 1116 return; 1117} 1118 1119static void 1120pcn_setfilt(ifp) 1121 struct ifnet *ifp; 1122{ 1123 struct pcn_softc *sc; 1124 1125 sc = ifp->if_softc; 1126 1127 /* If we want promiscuous mode, set the allframes bit. */ 1128 if (ifp->if_flags & IFF_PROMISC) { 1129 PCN_CSR_SETBIT(sc, PCN_CSR_MODE, PCN_MODE_PROMISC); 1130 } else { 1131 PCN_CSR_CLRBIT(sc, PCN_CSR_MODE, PCN_MODE_PROMISC); 1132 } 1133 1134 /* Set the capture broadcast bit to capture broadcast frames. */ 1135 if (ifp->if_flags & IFF_BROADCAST) { 1136 PCN_CSR_CLRBIT(sc, PCN_CSR_MODE, PCN_MODE_RXNOBROAD); 1137 } else { 1138 PCN_CSR_SETBIT(sc, PCN_CSR_MODE, PCN_MODE_RXNOBROAD); 1139 } 1140 1141 return; 1142} 1143 1144static void 1145pcn_init(xsc) 1146 void *xsc; 1147{ 1148 struct pcn_softc *sc = xsc; 1149 1150 PCN_LOCK(sc); 1151 pcn_init_locked(sc); 1152 PCN_UNLOCK(sc); 1153} 1154 1155static void 1156pcn_init_locked(sc) 1157 struct pcn_softc *sc; 1158{ 1159 struct ifnet *ifp = sc->pcn_ifp; 1160 struct mii_data *mii = NULL; 1161 1162 PCN_LOCK_ASSERT(sc); 1163 1164 /* 1165 * Cancel pending I/O and free all RX/TX buffers. 1166 */ 1167 pcn_stop(sc); 1168 pcn_reset(sc); 1169 1170 mii = device_get_softc(sc->pcn_miibus); 1171 1172 /* Set MAC address */ 1173 pcn_csr_write(sc, PCN_CSR_PAR0, 1174 ((u_int16_t *)IFP2ENADDR(sc->pcn_ifp))[0]); 1175 pcn_csr_write(sc, PCN_CSR_PAR1, 1176 ((u_int16_t *)IFP2ENADDR(sc->pcn_ifp))[1]); 1177 pcn_csr_write(sc, PCN_CSR_PAR2, 1178 ((u_int16_t *)IFP2ENADDR(sc->pcn_ifp))[2]); 1179 1180 /* Init circular RX list. */ 1181 if (pcn_list_rx_init(sc) == ENOBUFS) { 1182 printf("pcn%d: initialization failed: no " 1183 "memory for rx buffers\n", sc->pcn_unit); 1184 pcn_stop(sc); 1185 return; 1186 } 1187 1188 /* 1189 * Init tx descriptors. 1190 */ 1191 pcn_list_tx_init(sc); 1192 1193 /* Set up the mode register. */ 1194 pcn_csr_write(sc, PCN_CSR_MODE, PCN_PORT_MII); 1195 1196 /* Set up RX filter. */ 1197 pcn_setfilt(ifp); 1198 1199 /* 1200 * Load the multicast filter. 1201 */ 1202 pcn_setmulti(sc); 1203 1204 /* 1205 * Load the addresses of the RX and TX lists. 1206 */ 1207 pcn_csr_write(sc, PCN_CSR_RXADDR0, 1208 vtophys(&sc->pcn_ldata->pcn_rx_list[0]) & 0xFFFF); 1209 pcn_csr_write(sc, PCN_CSR_RXADDR1, 1210 (vtophys(&sc->pcn_ldata->pcn_rx_list[0]) >> 16) & 0xFFFF); 1211 pcn_csr_write(sc, PCN_CSR_TXADDR0, 1212 vtophys(&sc->pcn_ldata->pcn_tx_list[0]) & 0xFFFF); 1213 pcn_csr_write(sc, PCN_CSR_TXADDR1, 1214 (vtophys(&sc->pcn_ldata->pcn_tx_list[0]) >> 16) & 0xFFFF); 1215 1216 /* Set the RX and TX ring sizes. */ 1217 pcn_csr_write(sc, PCN_CSR_RXRINGLEN, (~PCN_RX_LIST_CNT) + 1); 1218 pcn_csr_write(sc, PCN_CSR_TXRINGLEN, (~PCN_TX_LIST_CNT) + 1); 1219 1220 /* We're not using the initialization block. */ 1221 pcn_csr_write(sc, PCN_CSR_IAB1, 0); 1222 1223 /* Enable fast suspend mode. */ 1224 PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL2, PCN_EXTCTL2_FASTSPNDE); 1225 1226 /* 1227 * Enable burst read and write. Also set the no underflow 1228 * bit. This will avoid transmit underruns in certain 1229 * conditions while still providing decent performance. 1230 */ 1231 PCN_BCR_SETBIT(sc, PCN_BCR_BUSCTL, PCN_BUSCTL_NOUFLOW| 1232 PCN_BUSCTL_BREAD|PCN_BUSCTL_BWRITE); 1233 1234 /* Enable graceful recovery from underflow. */ 1235 PCN_CSR_SETBIT(sc, PCN_CSR_IMR, PCN_IMR_DXSUFLO); 1236 1237 /* Enable auto-padding of short TX frames. */ 1238 PCN_CSR_SETBIT(sc, PCN_CSR_TFEAT, PCN_TFEAT_PAD_TX); 1239 1240 /* Disable MII autoneg (we handle this ourselves). */ 1241 PCN_BCR_SETBIT(sc, PCN_BCR_MIICTL, PCN_MIICTL_DANAS); 1242 1243 if (sc->pcn_type == Am79C978) 1244 pcn_bcr_write(sc, PCN_BCR_PHYSEL, 1245 PCN_PHYSEL_PCNET|PCN_PHY_HOMEPNA); 1246 1247 /* Enable interrupts and start the controller running. */ 1248 pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_INTEN|PCN_CSR_START); 1249 1250 mii_mediachg(mii); 1251 1252 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1253 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1254 1255 callout_reset(&sc->pcn_stat_callout, hz, pcn_tick, sc); 1256 1257 return; 1258} 1259 1260/* 1261 * Set media options. 1262 */ 1263static int 1264pcn_ifmedia_upd(ifp) 1265 struct ifnet *ifp; 1266{ 1267 struct pcn_softc *sc; 1268 struct mii_data *mii; 1269 1270 sc = ifp->if_softc; 1271 mii = device_get_softc(sc->pcn_miibus); 1272 1273 PCN_LOCK(sc); 1274 sc->pcn_link = 0; 1275 if (mii->mii_instance) { 1276 struct mii_softc *miisc; 1277 LIST_FOREACH(miisc, &mii->mii_phys, mii_list) 1278 mii_phy_reset(miisc); 1279 } 1280 mii_mediachg(mii); 1281 PCN_UNLOCK(sc); 1282 1283 return(0); 1284} 1285 1286/* 1287 * Report current media status. 1288 */ 1289static void 1290pcn_ifmedia_sts(ifp, ifmr) 1291 struct ifnet *ifp; 1292 struct ifmediareq *ifmr; 1293{ 1294 struct pcn_softc *sc; 1295 struct mii_data *mii; 1296 1297 sc = ifp->if_softc; 1298 1299 mii = device_get_softc(sc->pcn_miibus); 1300 PCN_LOCK(sc); 1301 mii_pollstat(mii); 1302 ifmr->ifm_active = mii->mii_media_active; 1303 ifmr->ifm_status = mii->mii_media_status; 1304 PCN_UNLOCK(sc); 1305 1306 return; 1307} 1308 1309static int 1310pcn_ioctl(ifp, command, data) 1311 struct ifnet *ifp; 1312 u_long command; 1313 caddr_t data; 1314{ 1315 struct pcn_softc *sc = ifp->if_softc; 1316 struct ifreq *ifr = (struct ifreq *) data; 1317 struct mii_data *mii = NULL; 1318 int error = 0; 1319 1320 switch(command) { 1321 case SIOCSIFFLAGS: 1322 PCN_LOCK(sc); 1323 if (ifp->if_flags & IFF_UP) { 1324 if (ifp->if_drv_flags & IFF_DRV_RUNNING && 1325 ifp->if_flags & IFF_PROMISC && 1326 !(sc->pcn_if_flags & IFF_PROMISC)) { 1327 PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1, 1328 PCN_EXTCTL1_SPND); 1329 pcn_setfilt(ifp); 1330 PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, 1331 PCN_EXTCTL1_SPND); 1332 pcn_csr_write(sc, PCN_CSR_CSR, 1333 PCN_CSR_INTEN|PCN_CSR_START); 1334 } else if (ifp->if_drv_flags & IFF_DRV_RUNNING && 1335 !(ifp->if_flags & IFF_PROMISC) && 1336 sc->pcn_if_flags & IFF_PROMISC) { 1337 PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1, 1338 PCN_EXTCTL1_SPND); 1339 pcn_setfilt(ifp); 1340 PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, 1341 PCN_EXTCTL1_SPND); 1342 pcn_csr_write(sc, PCN_CSR_CSR, 1343 PCN_CSR_INTEN|PCN_CSR_START); 1344 } else if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) 1345 pcn_init_locked(sc); 1346 } else { 1347 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1348 pcn_stop(sc); 1349 } 1350 sc->pcn_if_flags = ifp->if_flags; 1351 PCN_UNLOCK(sc); 1352 error = 0; 1353 break; 1354 case SIOCADDMULTI: 1355 case SIOCDELMULTI: 1356 PCN_LOCK(sc); 1357 pcn_setmulti(sc); 1358 PCN_UNLOCK(sc); 1359 error = 0; 1360 break; 1361 case SIOCGIFMEDIA: 1362 case SIOCSIFMEDIA: 1363 mii = device_get_softc(sc->pcn_miibus); 1364 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 1365 break; 1366 default: 1367 error = ether_ioctl(ifp, command, data); 1368 break; 1369 } 1370 1371 return(error); 1372} 1373 1374static void 1375pcn_watchdog(ifp) 1376 struct ifnet *ifp; 1377{ 1378 struct pcn_softc *sc; 1379 1380 sc = ifp->if_softc; 1381 1382 PCN_LOCK(sc); 1383 1384 ifp->if_oerrors++; 1385 printf("pcn%d: watchdog timeout\n", sc->pcn_unit); 1386 1387 pcn_stop(sc); 1388 pcn_reset(sc); 1389 pcn_init_locked(sc); 1390 1391 if (ifp->if_snd.ifq_head != NULL) 1392 pcn_start(ifp); 1393 1394 PCN_UNLOCK(sc); 1395 1396 return; 1397} 1398 1399/* 1400 * Stop the adapter and free any mbufs allocated to the 1401 * RX and TX lists. 1402 */ 1403static void 1404pcn_stop(sc) 1405 struct pcn_softc *sc; 1406{ 1407 register int i; 1408 struct ifnet *ifp; 1409 1410 PCN_LOCK_ASSERT(sc); 1411 ifp = sc->pcn_ifp; 1412 ifp->if_timer = 0; 1413 1414 callout_stop(&sc->pcn_stat_callout); 1415 1416 /* Turn off interrupts */ 1417 PCN_CSR_CLRBIT(sc, PCN_CSR_CSR, PCN_CSR_INTEN); 1418 /* Stop adapter */ 1419 PCN_CSR_SETBIT(sc, PCN_CSR_CSR, PCN_CSR_STOP); 1420 sc->pcn_link = 0; 1421 1422 /* 1423 * Free data in the RX lists. 1424 */ 1425 for (i = 0; i < PCN_RX_LIST_CNT; i++) { 1426 if (sc->pcn_cdata.pcn_rx_chain[i] != NULL) { 1427 m_freem(sc->pcn_cdata.pcn_rx_chain[i]); 1428 sc->pcn_cdata.pcn_rx_chain[i] = NULL; 1429 } 1430 } 1431 bzero((char *)&sc->pcn_ldata->pcn_rx_list, 1432 sizeof(sc->pcn_ldata->pcn_rx_list)); 1433 1434 /* 1435 * Free the TX list buffers. 1436 */ 1437 for (i = 0; i < PCN_TX_LIST_CNT; i++) { 1438 if (sc->pcn_cdata.pcn_tx_chain[i] != NULL) { 1439 m_freem(sc->pcn_cdata.pcn_tx_chain[i]); 1440 sc->pcn_cdata.pcn_tx_chain[i] = NULL; 1441 } 1442 } 1443 1444 bzero((char *)&sc->pcn_ldata->pcn_tx_list, 1445 sizeof(sc->pcn_ldata->pcn_tx_list)); 1446 1447 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 1448 1449 return; 1450} 1451 1452/* 1453 * Stop all chip I/O so that the kernel's probe routines don't 1454 * get confused by errant DMAs when rebooting. 1455 */ 1456static void 1457pcn_shutdown(dev) 1458 device_t dev; 1459{ 1460 struct pcn_softc *sc; 1461 1462 sc = device_get_softc(dev); 1463 1464 PCN_LOCK(sc); 1465 pcn_reset(sc); 1466 pcn_stop(sc); 1467 PCN_UNLOCK(sc); 1468 1469 return; 1470} 1471