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 * $FreeBSD: src/sys/pci/if_pcn.c,v 1.5.2.10 2003/03/05 18:42:33 njl Exp $ 34 */ 35 36 /* 37 * AMD Am79c972 fast ethernet PCI NIC driver. Datatheets are available 38 * from http://www.amd.com. 39 * 40 * Written by Bill Paul <wpaul@osd.bsdi.com> 41 */ 42 43 /* 44 * The AMD PCnet/PCI controllers are more advanced and functional 45 * versions of the venerable 7990 LANCE. The PCnet/PCI chips retain 46 * backwards compatibility with the LANCE and thus can be made 47 * to work with older LANCE drivers. This is in fact how the 48 * PCnet/PCI chips were supported in FreeBSD originally. The trouble 49 * is that the PCnet/PCI devices offer several performance enhancements 50 * which can't be exploited in LANCE compatibility mode. Chief among 51 * these enhancements is the ability to perform PCI DMA operations 52 * using 32-bit addressing (which eliminates the need for ISA 53 * bounce-buffering), and special receive buffer alignment (which 54 * allows the receive handler to pass packets to the upper protocol 55 * layers without copying on both the x86 and alpha platforms). 56 */ 57 58 #include <sys/param.h> 59 #include <sys/systm.h> 60 #include <sys/sockio.h> 61 #include <sys/mbuf.h> 62 #include <sys/malloc.h> 63 #include <sys/kernel.h> 64 #include <sys/interrupt.h> 65 #include <sys/socket.h> 66 #include <sys/serialize.h> 67 #include <sys/bus.h> 68 #include <sys/rman.h> 69 #include <sys/thread2.h> 70 71 #include <net/if.h> 72 #include <net/ifq_var.h> 73 #include <net/if_arp.h> 74 #include <net/ethernet.h> 75 #include <net/if_dl.h> 76 #include <net/if_media.h> 77 78 #include <net/bpf.h> 79 80 #include <vm/vm.h> /* for vtophys */ 81 #include <vm/pmap.h> /* for vtophys */ 82 83 #include <machine/clock.h> /* for DELAY */ 84 85 #include "../mii_layer/mii.h" 86 #include "../mii_layer/miivar.h" 87 88 #include <bus/pci/pcidevs.h> 89 #include <bus/pci/pcireg.h> 90 #include <bus/pci/pcivar.h> 91 92 #define PCN_USEIOSPACE 93 94 #include "if_pcnreg.h" 95 96 /* "controller miibus0" required. See GENERIC if you get errors here. */ 97 #include "miibus_if.h" 98 99 /* 100 * Various supported device vendors/types and their names. 101 */ 102 static struct pcn_type pcn_devs[] = { 103 { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_PCNET_PCI, 104 "AMD PCnet/PCI 10/100BaseTX" }, 105 { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_PCNET_HOME, 106 "AMD PCnet/Home HomePNA" }, 107 { 0, 0, NULL } 108 }; 109 110 static u_int32_t pcn_csr_read (struct pcn_softc *, int); 111 static u_int16_t pcn_csr_read16 (struct pcn_softc *, int); 112 static u_int16_t pcn_bcr_read16 (struct pcn_softc *, int); 113 static void pcn_csr_write (struct pcn_softc *, int, int); 114 static u_int32_t pcn_bcr_read (struct pcn_softc *, int); 115 static void pcn_bcr_write (struct pcn_softc *, int, int); 116 117 static int pcn_probe (device_t); 118 static int pcn_attach (device_t); 119 static int pcn_detach (device_t); 120 121 static int pcn_newbuf (struct pcn_softc *, int, struct mbuf *); 122 static int pcn_encap (struct pcn_softc *, 123 struct mbuf *, u_int32_t *); 124 static void pcn_rxeof (struct pcn_softc *); 125 static void pcn_txeof (struct pcn_softc *); 126 static void pcn_intr (void *); 127 static void pcn_tick (void *); 128 static void pcn_start (struct ifnet *); 129 static int pcn_ioctl (struct ifnet *, u_long, caddr_t, 130 struct ucred *); 131 static void pcn_init (void *); 132 static void pcn_stop (struct pcn_softc *); 133 static void pcn_watchdog (struct ifnet *); 134 static void pcn_shutdown (device_t); 135 static int pcn_ifmedia_upd (struct ifnet *); 136 static void pcn_ifmedia_sts (struct ifnet *, struct ifmediareq *); 137 138 static int pcn_miibus_readreg (device_t, int, int); 139 static int pcn_miibus_writereg (device_t, int, int, int); 140 static void pcn_miibus_statchg (device_t); 141 142 static void pcn_setfilt (struct ifnet *); 143 static void pcn_setmulti (struct pcn_softc *); 144 static u_int32_t pcn_crc (caddr_t); 145 static void pcn_reset (struct pcn_softc *); 146 static int pcn_list_rx_init (struct pcn_softc *); 147 static int pcn_list_tx_init (struct pcn_softc *); 148 149 #ifdef PCN_USEIOSPACE 150 #define PCN_RES SYS_RES_IOPORT 151 #define PCN_RID PCN_PCI_LOIO 152 #else 153 #define PCN_RES SYS_RES_MEMORY 154 #define PCN_RID PCN_PCI_LOMEM 155 #endif 156 157 static device_method_t pcn_methods[] = { 158 /* Device interface */ 159 DEVMETHOD(device_probe, pcn_probe), 160 DEVMETHOD(device_attach, pcn_attach), 161 DEVMETHOD(device_detach, pcn_detach), 162 DEVMETHOD(device_shutdown, pcn_shutdown), 163 164 /* bus interface */ 165 DEVMETHOD(bus_print_child, bus_generic_print_child), 166 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 167 168 /* MII interface */ 169 DEVMETHOD(miibus_readreg, pcn_miibus_readreg), 170 DEVMETHOD(miibus_writereg, pcn_miibus_writereg), 171 DEVMETHOD(miibus_statchg, pcn_miibus_statchg), 172 173 { 0, 0 } 174 }; 175 176 static driver_t pcn_driver = { 177 "pcn", 178 pcn_methods, 179 sizeof(struct pcn_softc) 180 }; 181 182 static devclass_t pcn_devclass; 183 184 DECLARE_DUMMY_MODULE(if_pcn); 185 DRIVER_MODULE(if_pcn, pci, pcn_driver, pcn_devclass, NULL, NULL); 186 DRIVER_MODULE(miibus, pcn, miibus_driver, miibus_devclass, NULL, NULL); 187 188 #define PCN_CSR_SETBIT(sc, reg, x) \ 189 pcn_csr_write(sc, reg, pcn_csr_read(sc, reg) | (x)) 190 191 #define PCN_CSR_CLRBIT(sc, reg, x) \ 192 pcn_csr_write(sc, reg, pcn_csr_read(sc, reg) & ~(x)) 193 194 #define PCN_BCR_SETBIT(sc, reg, x) \ 195 pcn_bcr_write(sc, reg, pcn_bcr_read(sc, reg) | (x)) 196 197 #define PCN_BCR_CLRBIT(sc, reg, x) \ 198 pcn_bcr_write(sc, reg, pcn_bcr_read(sc, reg) & ~(x)) 199 200 static u_int32_t 201 pcn_csr_read(struct pcn_softc *sc, int reg) 202 { 203 CSR_WRITE_4(sc, PCN_IO32_RAP, reg); 204 return(CSR_READ_4(sc, PCN_IO32_RDP)); 205 } 206 207 static u_int16_t 208 pcn_csr_read16(struct pcn_softc *sc, int reg) 209 { 210 CSR_WRITE_2(sc, PCN_IO16_RAP, reg); 211 return(CSR_READ_2(sc, PCN_IO16_RDP)); 212 } 213 214 static void 215 pcn_csr_write(struct pcn_softc *sc, int reg, int val) 216 { 217 CSR_WRITE_4(sc, PCN_IO32_RAP, reg); 218 CSR_WRITE_4(sc, PCN_IO32_RDP, val); 219 return; 220 } 221 222 static u_int32_t 223 pcn_bcr_read(struct pcn_softc *sc, int reg) 224 { 225 CSR_WRITE_4(sc, PCN_IO32_RAP, reg); 226 return(CSR_READ_4(sc, PCN_IO32_BDP)); 227 } 228 229 static u_int16_t 230 pcn_bcr_read16(struct pcn_softc *sc, int reg) 231 { 232 CSR_WRITE_2(sc, PCN_IO16_RAP, reg); 233 return(CSR_READ_2(sc, PCN_IO16_BDP)); 234 } 235 236 static void 237 pcn_bcr_write(struct pcn_softc *sc, int reg, int val) 238 { 239 CSR_WRITE_4(sc, PCN_IO32_RAP, reg); 240 CSR_WRITE_4(sc, PCN_IO32_BDP, val); 241 return; 242 } 243 244 static int 245 pcn_miibus_readreg(device_t dev, int phy, int reg) 246 { 247 struct pcn_softc *sc; 248 int val; 249 250 sc = device_get_softc(dev); 251 252 if (sc->pcn_phyaddr && phy > sc->pcn_phyaddr) 253 return(0); 254 255 pcn_bcr_write(sc, PCN_BCR_MIIADDR, reg | (phy << 5)); 256 val = pcn_bcr_read(sc, PCN_BCR_MIIDATA) & 0xFFFF; 257 if (val == 0xFFFF) 258 return(0); 259 260 sc->pcn_phyaddr = phy; 261 262 return(val); 263 } 264 265 static int 266 pcn_miibus_writereg(device_t dev, int phy, int reg, int data) 267 { 268 struct pcn_softc *sc; 269 270 sc = device_get_softc(dev); 271 272 pcn_bcr_write(sc, PCN_BCR_MIIADDR, reg | (phy << 5)); 273 pcn_bcr_write(sc, PCN_BCR_MIIDATA, data); 274 275 return(0); 276 } 277 278 static void 279 pcn_miibus_statchg(device_t dev) 280 { 281 struct pcn_softc *sc; 282 struct mii_data *mii; 283 284 sc = device_get_softc(dev); 285 mii = device_get_softc(sc->pcn_miibus); 286 287 if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) { 288 PCN_BCR_SETBIT(sc, PCN_BCR_DUPLEX, PCN_DUPLEX_FDEN); 289 } else { 290 PCN_BCR_CLRBIT(sc, PCN_BCR_DUPLEX, PCN_DUPLEX_FDEN); 291 } 292 293 return; 294 } 295 296 #define DC_POLY 0xEDB88320 297 298 static u_int32_t 299 pcn_crc(caddr_t addr) 300 { 301 u_int32_t idx, bit, data, crc; 302 303 /* Compute CRC for the address value. */ 304 crc = 0xFFFFFFFF; /* initial value */ 305 306 for (idx = 0; idx < 6; idx++) { 307 for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1) 308 crc = (crc >> 1) ^ (((crc ^ data) & 1) ? DC_POLY : 0); 309 } 310 311 return ((crc >> 26) & 0x3F); 312 } 313 314 static void 315 pcn_setmulti(struct pcn_softc *sc) 316 { 317 struct ifnet *ifp; 318 struct ifmultiaddr *ifma; 319 u_int32_t h, i; 320 u_int16_t hashes[4] = { 0, 0, 0, 0 }; 321 322 ifp = &sc->arpcom.ac_if; 323 324 PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); 325 326 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { 327 for (i = 0; i < 4; i++) 328 pcn_csr_write(sc, PCN_CSR_MAR0 + i, 0xFFFF); 329 PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); 330 return; 331 } 332 333 /* first, zot all the existing hash bits */ 334 for (i = 0; i < 4; i++) 335 pcn_csr_write(sc, PCN_CSR_MAR0 + i, 0); 336 337 /* now program new ones */ 338 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 339 if (ifma->ifma_addr->sa_family != AF_LINK) 340 continue; 341 h = pcn_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); 342 hashes[h >> 4] |= 1 << (h & 0xF); 343 } 344 345 for (i = 0; i < 4; i++) 346 pcn_csr_write(sc, PCN_CSR_MAR0 + i, hashes[i]); 347 348 PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); 349 350 return; 351 } 352 353 static void 354 pcn_reset(struct pcn_softc *sc) 355 { 356 /* 357 * Issue a reset by reading from the RESET register. 358 * Note that we don't know if the chip is operating in 359 * 16-bit or 32-bit mode at this point, so we attempt 360 * to reset the chip both ways. If one fails, the other 361 * will succeed. 362 */ 363 CSR_READ_2(sc, PCN_IO16_RESET); 364 CSR_READ_4(sc, PCN_IO32_RESET); 365 366 /* Wait a little while for the chip to get its brains in order. */ 367 DELAY(1000); 368 369 /* Select 32-bit (DWIO) mode */ 370 CSR_WRITE_4(sc, PCN_IO32_RDP, 0); 371 372 /* Select software style 3. */ 373 pcn_bcr_write(sc, PCN_BCR_SSTYLE, PCN_SWSTYLE_PCNETPCI_BURST); 374 375 return; 376 } 377 378 /* 379 * Probe for an AMD chip. Check the PCI vendor and device 380 * IDs against our list and return a device name if we find a match. 381 */ 382 static int 383 pcn_probe(device_t dev) 384 { 385 struct pcn_type *t; 386 struct pcn_softc *sc; 387 int rid; 388 u_int32_t chip_id; 389 390 t = pcn_devs; 391 sc = device_get_softc(dev); 392 393 while(t->pcn_name != NULL) { 394 if ((pci_get_vendor(dev) == t->pcn_vid) && 395 (pci_get_device(dev) == t->pcn_did)) { 396 /* 397 * Temporarily map the I/O space 398 * so we can read the chip ID register. 399 */ 400 rid = PCN_RID; 401 sc->pcn_res = bus_alloc_resource_any(dev, PCN_RES, 402 &rid, RF_ACTIVE); 403 if (sc->pcn_res == NULL) { 404 device_printf(dev, 405 "couldn't map ports/memory\n"); 406 return(ENXIO); 407 } 408 sc->pcn_btag = rman_get_bustag(sc->pcn_res); 409 sc->pcn_bhandle = rman_get_bushandle(sc->pcn_res); 410 /* 411 * Note: we can *NOT* put the chip into 412 * 32-bit mode yet. The lnc driver will only 413 * work in 16-bit mode, and once the chip 414 * goes into 32-bit mode, the only way to 415 * get it out again is with a hardware reset. 416 * So if pcn_probe() is called before the 417 * lnc driver's probe routine, the chip will 418 * be locked into 32-bit operation and the lnc 419 * driver will be unable to attach to it. 420 * Note II: if the chip happens to already 421 * be in 32-bit mode, we still need to check 422 * the chip ID, but first we have to detect 423 * 32-bit mode using only 16-bit operations. 424 * The safest way to do this is to read the 425 * PCI subsystem ID from BCR23/24 and compare 426 * that with the value read from PCI config 427 * space. 428 */ 429 chip_id = pcn_bcr_read16(sc, PCN_BCR_PCISUBSYSID); 430 chip_id <<= 16; 431 chip_id |= pcn_bcr_read16(sc, PCN_BCR_PCISUBVENID); 432 /* 433 * Note III: the test for 0x10001000 is a hack to 434 * pacify VMware, who's pseudo-PCnet interface is 435 * broken. Reading the subsystem register from PCI 436 * config space yeilds 0x00000000 while reading the 437 * same value from I/O space yeilds 0x10001000. It's 438 * not supposed to be that way. 439 */ 440 if (chip_id == pci_read_config(dev, 441 PCIR_SUBVEND_0, 4) || chip_id == 0x10001000) { 442 /* We're in 16-bit mode. */ 443 chip_id = pcn_csr_read16(sc, PCN_CSR_CHIPID1); 444 chip_id <<= 16; 445 chip_id |= pcn_csr_read16(sc, PCN_CSR_CHIPID0); 446 } else { 447 /* We're in 32-bit mode. */ 448 chip_id = pcn_csr_read(sc, PCN_CSR_CHIPID1); 449 chip_id <<= 16; 450 chip_id |= pcn_csr_read(sc, PCN_CSR_CHIPID0); 451 } 452 bus_release_resource(dev, PCN_RES, 453 PCN_RID, sc->pcn_res); 454 chip_id >>= 12; 455 sc->pcn_type = chip_id & PART_MASK; 456 switch(sc->pcn_type) { 457 case Am79C971: 458 case Am79C972: 459 case Am79C973: 460 case Am79C975: 461 case Am79C976: 462 case Am79C978: 463 break; 464 default: 465 return(ENXIO); 466 break; 467 } 468 device_set_desc(dev, t->pcn_name); 469 return(0); 470 } 471 t++; 472 } 473 474 return(ENXIO); 475 } 476 477 /* 478 * Attach the interface. Allocate softc structures, do ifmedia 479 * setup and ethernet/BPF attach. 480 */ 481 static int 482 pcn_attach(device_t dev) 483 { 484 uint8_t eaddr[ETHER_ADDR_LEN]; 485 u_int32_t command; 486 struct pcn_softc *sc; 487 struct ifnet *ifp; 488 int unit, error = 0, rid; 489 490 sc = device_get_softc(dev); 491 unit = device_get_unit(dev); 492 493 /* 494 * Handle power management nonsense. 495 */ 496 497 command = pci_read_config(dev, PCN_PCI_CAPID, 4) & 0x000000FF; 498 if (command == 0x01) { 499 500 command = pci_read_config(dev, PCN_PCI_PWRMGMTCTRL, 4); 501 if (command & PCN_PSTATE_MASK) { 502 u_int32_t iobase, membase, irq; 503 504 /* Save important PCI config data. */ 505 iobase = pci_read_config(dev, PCN_PCI_LOIO, 4); 506 membase = pci_read_config(dev, PCN_PCI_LOMEM, 4); 507 irq = pci_read_config(dev, PCN_PCI_INTLINE, 4); 508 509 /* Reset the power state. */ 510 kprintf("pcn%d: chip is in D%d power mode " 511 "-- setting to D0\n", unit, command & PCN_PSTATE_MASK); 512 command &= 0xFFFFFFFC; 513 pci_write_config(dev, PCN_PCI_PWRMGMTCTRL, command, 4); 514 515 /* Restore PCI config data. */ 516 pci_write_config(dev, PCN_PCI_LOIO, iobase, 4); 517 pci_write_config(dev, PCN_PCI_LOMEM, membase, 4); 518 pci_write_config(dev, PCN_PCI_INTLINE, irq, 4); 519 } 520 } 521 522 /* 523 * Map control/status registers. 524 */ 525 command = pci_read_config(dev, PCIR_COMMAND, 4); 526 command |= (PCIM_CMD_PORTEN|PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN); 527 pci_write_config(dev, PCIR_COMMAND, command, 4); 528 command = pci_read_config(dev, PCIR_COMMAND, 4); 529 530 #ifdef PCN_USEIOSPACE 531 if (!(command & PCIM_CMD_PORTEN)) { 532 kprintf("pcn%d: failed to enable I/O ports!\n", unit); 533 error = ENXIO; 534 return(error); 535 } 536 #else 537 if (!(command & PCIM_CMD_MEMEN)) { 538 kprintf("pcn%d: failed to enable memory mapping!\n", unit); 539 error = ENXIO; 540 return(error); 541 } 542 #endif 543 544 rid = PCN_RID; 545 sc->pcn_res = bus_alloc_resource_any(dev, PCN_RES, &rid, RF_ACTIVE); 546 547 if (sc->pcn_res == NULL) { 548 kprintf("pcn%d: couldn't map ports/memory\n", unit); 549 error = ENXIO; 550 return(error); 551 } 552 553 sc->pcn_btag = rman_get_bustag(sc->pcn_res); 554 sc->pcn_bhandle = rman_get_bushandle(sc->pcn_res); 555 556 /* Allocate interrupt */ 557 rid = 0; 558 sc->pcn_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 559 RF_SHAREABLE | RF_ACTIVE); 560 561 if (sc->pcn_irq == NULL) { 562 kprintf("pcn%d: couldn't map interrupt\n", unit); 563 error = ENXIO; 564 goto fail; 565 } 566 567 /* Reset the adapter. */ 568 pcn_reset(sc); 569 570 /* 571 * Get station address from the EEPROM. 572 */ 573 *(uint32_t *)eaddr = CSR_READ_4(sc, PCN_IO32_APROM00); 574 *(uint16_t *)(eaddr + 4) = CSR_READ_2(sc, PCN_IO32_APROM01); 575 576 sc->pcn_unit = unit; 577 callout_init(&sc->pcn_stat_timer); 578 579 sc->pcn_ldata = contigmalloc(sizeof(struct pcn_list_data), M_DEVBUF, 580 M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0); 581 582 if (sc->pcn_ldata == NULL) { 583 kprintf("pcn%d: no memory for list buffers!\n", unit); 584 error = ENXIO; 585 goto fail; 586 } 587 bzero(sc->pcn_ldata, sizeof(struct pcn_list_data)); 588 589 ifp = &sc->arpcom.ac_if; 590 ifp->if_softc = sc; 591 if_initname(ifp, "pcn", unit); 592 ifp->if_mtu = ETHERMTU; 593 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 594 ifp->if_ioctl = pcn_ioctl; 595 ifp->if_start = pcn_start; 596 ifp->if_watchdog = pcn_watchdog; 597 ifp->if_init = pcn_init; 598 ifp->if_baudrate = 10000000; 599 ifq_set_maxlen(&ifp->if_snd, PCN_TX_LIST_CNT - 1); 600 ifq_set_ready(&ifp->if_snd); 601 602 /* 603 * Do MII setup. 604 */ 605 if (mii_phy_probe(dev, &sc->pcn_miibus, 606 pcn_ifmedia_upd, pcn_ifmedia_sts)) { 607 kprintf("pcn%d: MII without any PHY!\n", sc->pcn_unit); 608 error = ENXIO; 609 goto fail; 610 } 611 612 /* 613 * Call MI attach routine. 614 */ 615 ether_ifattach(ifp, eaddr, NULL); 616 617 error = bus_setup_intr(dev, sc->pcn_irq, INTR_MPSAFE, 618 pcn_intr, sc, &sc->pcn_intrhand, 619 ifp->if_serializer); 620 if (error) { 621 ether_ifdetach(ifp); 622 device_printf(dev, "couldn't set up irq\n"); 623 goto fail; 624 } 625 626 ifp->if_cpuid = rman_get_cpuid(sc->pcn_irq); 627 KKASSERT(ifp->if_cpuid >= 0 && ifp->if_cpuid < ncpus); 628 629 return (0); 630 fail: 631 pcn_detach(dev); 632 return(error); 633 } 634 635 static int 636 pcn_detach(device_t dev) 637 { 638 struct pcn_softc *sc = device_get_softc(dev); 639 struct ifnet *ifp = &sc->arpcom.ac_if; 640 641 if (device_is_attached(dev)) { 642 lwkt_serialize_enter(ifp->if_serializer); 643 pcn_reset(sc); 644 pcn_stop(sc); 645 bus_teardown_intr(dev, sc->pcn_irq, sc->pcn_intrhand); 646 lwkt_serialize_exit(ifp->if_serializer); 647 648 ether_ifdetach(ifp); 649 } 650 651 if (sc->pcn_miibus != NULL) 652 device_delete_child(dev, sc->pcn_miibus); 653 bus_generic_detach(dev); 654 655 if (sc->pcn_irq) 656 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->pcn_irq); 657 if (sc->pcn_res) 658 bus_release_resource(dev, PCN_RES, PCN_RID, sc->pcn_res); 659 660 if (sc->pcn_ldata) { 661 contigfree(sc->pcn_ldata, sizeof(struct pcn_list_data), 662 M_DEVBUF); 663 } 664 665 return(0); 666 } 667 668 /* 669 * Initialize the transmit descriptors. 670 */ 671 static int 672 pcn_list_tx_init(struct pcn_softc *sc) 673 { 674 struct pcn_list_data *ld; 675 struct pcn_ring_data *cd; 676 int i; 677 678 cd = &sc->pcn_cdata; 679 ld = sc->pcn_ldata; 680 681 for (i = 0; i < PCN_TX_LIST_CNT; i++) { 682 cd->pcn_tx_chain[i] = NULL; 683 ld->pcn_tx_list[i].pcn_tbaddr = 0; 684 ld->pcn_tx_list[i].pcn_txctl = 0; 685 ld->pcn_tx_list[i].pcn_txstat = 0; 686 } 687 688 cd->pcn_tx_prod = cd->pcn_tx_cons = cd->pcn_tx_cnt = 0; 689 690 return(0); 691 } 692 693 694 /* 695 * Initialize the RX descriptors and allocate mbufs for them. 696 */ 697 static int 698 pcn_list_rx_init(struct pcn_softc *sc) 699 { 700 struct pcn_ring_data *cd; 701 int i; 702 703 cd = &sc->pcn_cdata; 704 705 for (i = 0; i < PCN_RX_LIST_CNT; i++) { 706 if (pcn_newbuf(sc, i, NULL) == ENOBUFS) 707 return(ENOBUFS); 708 } 709 710 cd->pcn_rx_prod = 0; 711 712 return(0); 713 } 714 715 /* 716 * Initialize an RX descriptor and attach an MBUF cluster. 717 */ 718 static int 719 pcn_newbuf(struct pcn_softc *sc, int idx, struct mbuf *m) 720 { 721 struct mbuf *m_new = NULL; 722 struct pcn_rx_desc *c; 723 724 c = &sc->pcn_ldata->pcn_rx_list[idx]; 725 726 if (m == NULL) { 727 MGETHDR(m_new, MB_DONTWAIT, MT_DATA); 728 if (m_new == NULL) 729 return(ENOBUFS); 730 731 MCLGET(m_new, MB_DONTWAIT); 732 if (!(m_new->m_flags & M_EXT)) { 733 m_freem(m_new); 734 return(ENOBUFS); 735 } 736 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 737 } else { 738 m_new = m; 739 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 740 m_new->m_data = m_new->m_ext.ext_buf; 741 } 742 743 m_adj(m_new, ETHER_ALIGN); 744 745 sc->pcn_cdata.pcn_rx_chain[idx] = m_new; 746 c->pcn_rbaddr = vtophys(mtod(m_new, caddr_t)); 747 c->pcn_bufsz = (~(PCN_RXLEN) + 1) & PCN_RXLEN_BUFSZ; 748 c->pcn_bufsz |= PCN_RXLEN_MBO; 749 c->pcn_rxstat = PCN_RXSTAT_STP|PCN_RXSTAT_ENP|PCN_RXSTAT_OWN; 750 751 return(0); 752 } 753 754 /* 755 * A frame has been uploaded: pass the resulting mbuf chain up to 756 * the higher level protocols. 757 */ 758 static void 759 pcn_rxeof(struct pcn_softc *sc) 760 { 761 struct mbuf *m; 762 struct ifnet *ifp; 763 struct pcn_rx_desc *cur_rx; 764 int i; 765 766 ifp = &sc->arpcom.ac_if; 767 i = sc->pcn_cdata.pcn_rx_prod; 768 769 while(PCN_OWN_RXDESC(&sc->pcn_ldata->pcn_rx_list[i])) { 770 cur_rx = &sc->pcn_ldata->pcn_rx_list[i]; 771 m = sc->pcn_cdata.pcn_rx_chain[i]; 772 sc->pcn_cdata.pcn_rx_chain[i] = NULL; 773 774 /* 775 * If an error occurs, update stats, clear the 776 * status word and leave the mbuf cluster in place: 777 * it should simply get re-used next time this descriptor 778 * comes up in the ring. 779 */ 780 if (cur_rx->pcn_rxstat & PCN_RXSTAT_ERR) { 781 ifp->if_ierrors++; 782 pcn_newbuf(sc, i, m); 783 PCN_INC(i, PCN_RX_LIST_CNT); 784 continue; 785 } 786 787 if (pcn_newbuf(sc, i, NULL)) { 788 /* Ran out of mbufs; recycle this one. */ 789 pcn_newbuf(sc, i, m); 790 ifp->if_ierrors++; 791 PCN_INC(i, PCN_RX_LIST_CNT); 792 continue; 793 } 794 795 PCN_INC(i, PCN_RX_LIST_CNT); 796 797 /* No errors; receive the packet. */ 798 ifp->if_ipackets++; 799 m->m_len = m->m_pkthdr.len = 800 cur_rx->pcn_rxlen - ETHER_CRC_LEN; 801 m->m_pkthdr.rcvif = ifp; 802 803 ifp->if_input(ifp, m); 804 } 805 806 sc->pcn_cdata.pcn_rx_prod = i; 807 808 return; 809 } 810 811 /* 812 * A frame was downloaded to the chip. It's safe for us to clean up 813 * the list buffers. 814 */ 815 816 static void 817 pcn_txeof(struct pcn_softc *sc) 818 { 819 struct pcn_tx_desc *cur_tx = NULL; 820 struct ifnet *ifp; 821 u_int32_t idx; 822 823 ifp = &sc->arpcom.ac_if; 824 825 /* 826 * Go through our tx list and free mbufs for those 827 * frames that have been transmitted. 828 */ 829 idx = sc->pcn_cdata.pcn_tx_cons; 830 while (idx != sc->pcn_cdata.pcn_tx_prod) { 831 cur_tx = &sc->pcn_ldata->pcn_tx_list[idx]; 832 833 if (!PCN_OWN_TXDESC(cur_tx)) 834 break; 835 836 if (!(cur_tx->pcn_txctl & PCN_TXCTL_ENP)) { 837 sc->pcn_cdata.pcn_tx_cnt--; 838 PCN_INC(idx, PCN_TX_LIST_CNT); 839 continue; 840 } 841 842 if (cur_tx->pcn_txctl & PCN_TXCTL_ERR) { 843 ifp->if_oerrors++; 844 if (cur_tx->pcn_txstat & PCN_TXSTAT_EXDEF) 845 ifp->if_collisions++; 846 if (cur_tx->pcn_txstat & PCN_TXSTAT_RTRY) 847 ifp->if_collisions++; 848 } 849 850 ifp->if_collisions += 851 cur_tx->pcn_txstat & PCN_TXSTAT_TRC; 852 853 ifp->if_opackets++; 854 if (sc->pcn_cdata.pcn_tx_chain[idx] != NULL) { 855 m_freem(sc->pcn_cdata.pcn_tx_chain[idx]); 856 sc->pcn_cdata.pcn_tx_chain[idx] = NULL; 857 } 858 859 sc->pcn_cdata.pcn_tx_cnt--; 860 PCN_INC(idx, PCN_TX_LIST_CNT); 861 } 862 863 if (idx != sc->pcn_cdata.pcn_tx_cons) { 864 /* Some buffers have been freed. */ 865 sc->pcn_cdata.pcn_tx_cons = idx; 866 ifp->if_flags &= ~IFF_OACTIVE; 867 } 868 ifp->if_timer = (sc->pcn_cdata.pcn_tx_cnt == 0) ? 0 : 5; 869 870 return; 871 } 872 873 static void 874 pcn_tick(void *xsc) 875 { 876 struct pcn_softc *sc = xsc; 877 struct mii_data *mii; 878 struct ifnet *ifp = &sc->arpcom.ac_if; 879 880 lwkt_serialize_enter(ifp->if_serializer); 881 882 mii = device_get_softc(sc->pcn_miibus); 883 mii_tick(mii); 884 885 if (sc->pcn_link && !(mii->mii_media_status & IFM_ACTIVE)) 886 sc->pcn_link = 0; 887 888 if (!sc->pcn_link) { 889 mii_pollstat(mii); 890 if (mii->mii_media_status & IFM_ACTIVE && 891 IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) 892 sc->pcn_link++; 893 if (!ifq_is_empty(&ifp->if_snd)) 894 if_devstart(ifp); 895 } 896 callout_reset(&sc->pcn_stat_timer, hz, pcn_tick, sc); 897 898 lwkt_serialize_exit(ifp->if_serializer); 899 } 900 901 static void 902 pcn_intr(void *arg) 903 { 904 struct pcn_softc *sc; 905 struct ifnet *ifp; 906 u_int32_t status; 907 908 sc = arg; 909 ifp = &sc->arpcom.ac_if; 910 911 /* Supress unwanted interrupts */ 912 if (!(ifp->if_flags & IFF_UP)) { 913 pcn_stop(sc); 914 return; 915 } 916 917 CSR_WRITE_4(sc, PCN_IO32_RAP, PCN_CSR_CSR); 918 919 while ((status = CSR_READ_4(sc, PCN_IO32_RDP)) & PCN_CSR_INTR) { 920 CSR_WRITE_4(sc, PCN_IO32_RDP, status); 921 922 if (status & PCN_CSR_RINT) 923 pcn_rxeof(sc); 924 925 if (status & PCN_CSR_TINT) 926 pcn_txeof(sc); 927 928 if (status & PCN_CSR_ERR) { 929 pcn_init(sc); 930 break; 931 } 932 } 933 934 if (!ifq_is_empty(&ifp->if_snd)) 935 if_devstart(ifp); 936 } 937 938 /* 939 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 940 * pointers to the fragment pointers. 941 */ 942 static int 943 pcn_encap(struct pcn_softc *sc, struct mbuf *m_head, u_int32_t *txidx) 944 { 945 struct pcn_tx_desc *f = NULL; 946 struct mbuf *m; 947 int frag, cur, cnt = 0; 948 949 /* 950 * Start packing the mbufs in this chain into 951 * the fragment pointers. Stop when we run out 952 * of fragments or hit the end of the mbuf chain. 953 */ 954 cur = frag = *txidx; 955 956 for (m = m_head; m != NULL; m = m->m_next) { 957 if (m->m_len != 0) { 958 if ((PCN_TX_LIST_CNT - 959 (sc->pcn_cdata.pcn_tx_cnt + cnt)) < 2) 960 break; 961 f = &sc->pcn_ldata->pcn_tx_list[frag]; 962 f->pcn_txctl = (~(m->m_len) + 1) & PCN_TXCTL_BUFSZ; 963 f->pcn_txctl |= PCN_TXCTL_MBO; 964 f->pcn_tbaddr = vtophys(mtod(m, vm_offset_t)); 965 if (cnt == 0) 966 f->pcn_txctl |= PCN_TXCTL_STP; 967 else 968 f->pcn_txctl |= PCN_TXCTL_OWN; 969 cur = frag; 970 PCN_INC(frag, PCN_TX_LIST_CNT); 971 cnt++; 972 } 973 } 974 /* Caller should make sure that 'm_head' is not excessive fragmented */ 975 KASSERT(m == NULL, ("too many fragments\n")); 976 977 sc->pcn_cdata.pcn_tx_chain[cur] = m_head; 978 sc->pcn_ldata->pcn_tx_list[cur].pcn_txctl |= 979 PCN_TXCTL_ENP|PCN_TXCTL_ADD_FCS|PCN_TXCTL_MORE_LTINT; 980 sc->pcn_ldata->pcn_tx_list[*txidx].pcn_txctl |= PCN_TXCTL_OWN; 981 sc->pcn_cdata.pcn_tx_cnt += cnt; 982 *txidx = frag; 983 984 return(0); 985 } 986 987 /* 988 * Main transmit routine. To avoid having to do mbuf copies, we put pointers 989 * to the mbuf data regions directly in the transmit lists. We also save a 990 * copy of the pointers since the transmit list fragment pointers are 991 * physical addresses. 992 */ 993 static void 994 pcn_start(struct ifnet *ifp) 995 { 996 struct pcn_softc *sc; 997 struct mbuf *m_head = NULL, *m_defragged; 998 u_int32_t idx; 999 int need_trans; 1000 1001 sc = ifp->if_softc; 1002 1003 if (!sc->pcn_link) { 1004 ifq_purge(&ifp->if_snd); 1005 return; 1006 } 1007 1008 idx = sc->pcn_cdata.pcn_tx_prod; 1009 1010 if ((ifp->if_flags & (IFF_OACTIVE | IFF_RUNNING)) != IFF_RUNNING) 1011 return; 1012 1013 need_trans = 0; 1014 while (sc->pcn_cdata.pcn_tx_chain[idx] == NULL) { 1015 struct mbuf *m; 1016 int cnt; 1017 1018 m_defragged = NULL; 1019 m_head = ifq_dequeue(&ifp->if_snd, NULL); 1020 if (m_head == NULL) 1021 break; 1022 1023 again: 1024 cnt = 0; 1025 for (m = m_head; m != NULL; m = m->m_next) 1026 ++cnt; 1027 if ((PCN_TX_LIST_CNT - 1028 (sc->pcn_cdata.pcn_tx_cnt + cnt)) < 2) { 1029 if (m_defragged != NULL) { 1030 /* 1031 * Even after defragmentation, there 1032 * are still too many fragments, so 1033 * drop this packet. 1034 */ 1035 m_freem(m_head); 1036 ifp->if_flags |= IFF_OACTIVE; 1037 break; 1038 } 1039 1040 m_defragged = m_defrag(m_head, MB_DONTWAIT); 1041 if (m_defragged == NULL) { 1042 m_freem(m_head); 1043 continue; 1044 } 1045 m_head = m_defragged; 1046 1047 /* Recount # of fragments */ 1048 goto again; 1049 } 1050 1051 pcn_encap(sc, m_head, &idx); 1052 need_trans = 1; 1053 1054 BPF_MTAP(ifp, m_head); 1055 } 1056 1057 if (!need_trans) 1058 return; 1059 1060 /* Transmit */ 1061 sc->pcn_cdata.pcn_tx_prod = idx; 1062 pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_TX|PCN_CSR_INTEN); 1063 1064 /* 1065 * Set a timeout in case the chip goes out to lunch. 1066 */ 1067 ifp->if_timer = 5; 1068 } 1069 1070 void 1071 pcn_setfilt(struct ifnet *ifp) 1072 { 1073 struct pcn_softc *sc; 1074 1075 sc = ifp->if_softc; 1076 1077 /* If we want promiscuous mode, set the allframes bit. */ 1078 if (ifp->if_flags & IFF_PROMISC) { 1079 PCN_CSR_SETBIT(sc, PCN_CSR_MODE, PCN_MODE_PROMISC); 1080 } else { 1081 PCN_CSR_CLRBIT(sc, PCN_CSR_MODE, PCN_MODE_PROMISC); 1082 } 1083 1084 /* Set the capture broadcast bit to capture broadcast frames. */ 1085 if (ifp->if_flags & IFF_BROADCAST) { 1086 PCN_CSR_CLRBIT(sc, PCN_CSR_MODE, PCN_MODE_RXNOBROAD); 1087 } else { 1088 PCN_CSR_SETBIT(sc, PCN_CSR_MODE, PCN_MODE_RXNOBROAD); 1089 } 1090 1091 return; 1092 } 1093 1094 static void 1095 pcn_init(void *xsc) 1096 { 1097 struct pcn_softc *sc = xsc; 1098 struct ifnet *ifp = &sc->arpcom.ac_if; 1099 struct mii_data *mii = NULL; 1100 1101 /* 1102 * Cancel pending I/O and free all RX/TX buffers. 1103 */ 1104 pcn_stop(sc); 1105 pcn_reset(sc); 1106 1107 mii = device_get_softc(sc->pcn_miibus); 1108 1109 /* Set MAC address */ 1110 pcn_csr_write(sc, PCN_CSR_PAR0, 1111 ((u_int16_t *)sc->arpcom.ac_enaddr)[0]); 1112 pcn_csr_write(sc, PCN_CSR_PAR1, 1113 ((u_int16_t *)sc->arpcom.ac_enaddr)[1]); 1114 pcn_csr_write(sc, PCN_CSR_PAR2, 1115 ((u_int16_t *)sc->arpcom.ac_enaddr)[2]); 1116 1117 /* Init circular RX list. */ 1118 if (pcn_list_rx_init(sc) == ENOBUFS) { 1119 kprintf("pcn%d: initialization failed: no " 1120 "memory for rx buffers\n", sc->pcn_unit); 1121 pcn_stop(sc); 1122 1123 return; 1124 } 1125 1126 /* Set up RX filter. */ 1127 pcn_setfilt(ifp); 1128 1129 /* 1130 * Init tx descriptors. 1131 */ 1132 pcn_list_tx_init(sc); 1133 1134 /* Set up the mode register. */ 1135 pcn_csr_write(sc, PCN_CSR_MODE, PCN_PORT_MII); 1136 1137 /* 1138 * Load the multicast filter. 1139 */ 1140 pcn_setmulti(sc); 1141 1142 /* 1143 * Load the addresses of the RX and TX lists. 1144 */ 1145 pcn_csr_write(sc, PCN_CSR_RXADDR0, 1146 vtophys(&sc->pcn_ldata->pcn_rx_list[0]) & 0xFFFF); 1147 pcn_csr_write(sc, PCN_CSR_RXADDR1, 1148 (vtophys(&sc->pcn_ldata->pcn_rx_list[0]) >> 16) & 0xFFFF); 1149 pcn_csr_write(sc, PCN_CSR_TXADDR0, 1150 vtophys(&sc->pcn_ldata->pcn_tx_list[0]) & 0xFFFF); 1151 pcn_csr_write(sc, PCN_CSR_TXADDR1, 1152 (vtophys(&sc->pcn_ldata->pcn_tx_list[0]) >> 16) & 0xFFFF); 1153 1154 /* Set the RX and TX ring sizes. */ 1155 pcn_csr_write(sc, PCN_CSR_RXRINGLEN, (~PCN_RX_LIST_CNT) + 1); 1156 pcn_csr_write(sc, PCN_CSR_TXRINGLEN, (~PCN_TX_LIST_CNT) + 1); 1157 1158 /* We're not using the initialization block. */ 1159 pcn_csr_write(sc, PCN_CSR_IAB1, 0); 1160 1161 /* Enable fast suspend mode. */ 1162 PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL2, PCN_EXTCTL2_FASTSPNDE); 1163 1164 /* 1165 * Enable burst read and write. Also set the no underflow 1166 * bit. This will avoid transmit underruns in certain 1167 * conditions while still providing decent performance. 1168 */ 1169 PCN_BCR_SETBIT(sc, PCN_BCR_BUSCTL, PCN_BUSCTL_NOUFLOW| 1170 PCN_BUSCTL_BREAD|PCN_BUSCTL_BWRITE); 1171 1172 /* Enable graceful recovery from underflow. */ 1173 PCN_CSR_SETBIT(sc, PCN_CSR_IMR, PCN_IMR_DXSUFLO); 1174 1175 /* Enable auto-padding of short TX frames. */ 1176 PCN_CSR_SETBIT(sc, PCN_CSR_TFEAT, PCN_TFEAT_PAD_TX); 1177 1178 /* Disable MII autoneg (we handle this ourselves). */ 1179 PCN_BCR_SETBIT(sc, PCN_BCR_MIICTL, PCN_MIICTL_DANAS); 1180 1181 if (sc->pcn_type == Am79C978) 1182 pcn_bcr_write(sc, PCN_BCR_PHYSEL, 1183 PCN_PHYSEL_PCNET|PCN_PHY_HOMEPNA); 1184 1185 /* Enable interrupts and start the controller running. */ 1186 pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_INTEN|PCN_CSR_START); 1187 1188 mii_mediachg(mii); 1189 1190 ifp->if_flags |= IFF_RUNNING; 1191 ifp->if_flags &= ~IFF_OACTIVE; 1192 1193 callout_reset(&sc->pcn_stat_timer, hz, pcn_tick, sc); 1194 } 1195 1196 /* 1197 * Set media options. 1198 */ 1199 static int 1200 pcn_ifmedia_upd(struct ifnet *ifp) 1201 { 1202 struct pcn_softc *sc; 1203 struct mii_data *mii; 1204 1205 sc = ifp->if_softc; 1206 mii = device_get_softc(sc->pcn_miibus); 1207 1208 sc->pcn_link = 0; 1209 if (mii->mii_instance) { 1210 struct mii_softc *miisc; 1211 for (miisc = LIST_FIRST(&mii->mii_phys); miisc != NULL; 1212 miisc = LIST_NEXT(miisc, mii_list)) 1213 mii_phy_reset(miisc); 1214 } 1215 mii_mediachg(mii); 1216 1217 return(0); 1218 } 1219 1220 /* 1221 * Report current media status. 1222 */ 1223 static void 1224 pcn_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 1225 { 1226 struct pcn_softc *sc; 1227 struct mii_data *mii; 1228 1229 sc = ifp->if_softc; 1230 1231 mii = device_get_softc(sc->pcn_miibus); 1232 mii_pollstat(mii); 1233 ifmr->ifm_active = mii->mii_media_active; 1234 ifmr->ifm_status = mii->mii_media_status; 1235 1236 return; 1237 } 1238 1239 static int 1240 pcn_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr) 1241 { 1242 struct pcn_softc *sc = ifp->if_softc; 1243 struct ifreq *ifr = (struct ifreq *) data; 1244 struct mii_data *mii = NULL; 1245 int error = 0; 1246 1247 switch(command) { 1248 case SIOCSIFFLAGS: 1249 if (ifp->if_flags & IFF_UP) { 1250 if (ifp->if_flags & IFF_RUNNING && 1251 ifp->if_flags & IFF_PROMISC && 1252 !(sc->pcn_if_flags & IFF_PROMISC)) { 1253 PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1, 1254 PCN_EXTCTL1_SPND); 1255 pcn_setfilt(ifp); 1256 PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, 1257 PCN_EXTCTL1_SPND); 1258 pcn_csr_write(sc, PCN_CSR_CSR, 1259 PCN_CSR_INTEN|PCN_CSR_START); 1260 } else if (ifp->if_flags & IFF_RUNNING && 1261 !(ifp->if_flags & IFF_PROMISC) && 1262 sc->pcn_if_flags & IFF_PROMISC) { 1263 PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1, 1264 PCN_EXTCTL1_SPND); 1265 pcn_setfilt(ifp); 1266 PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, 1267 PCN_EXTCTL1_SPND); 1268 pcn_csr_write(sc, PCN_CSR_CSR, 1269 PCN_CSR_INTEN|PCN_CSR_START); 1270 } else if (!(ifp->if_flags & IFF_RUNNING)) 1271 pcn_init(sc); 1272 } else { 1273 if (ifp->if_flags & IFF_RUNNING) 1274 pcn_stop(sc); 1275 } 1276 sc->pcn_if_flags = ifp->if_flags; 1277 error = 0; 1278 break; 1279 case SIOCADDMULTI: 1280 case SIOCDELMULTI: 1281 pcn_setmulti(sc); 1282 error = 0; 1283 break; 1284 case SIOCGIFMEDIA: 1285 case SIOCSIFMEDIA: 1286 mii = device_get_softc(sc->pcn_miibus); 1287 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 1288 break; 1289 default: 1290 error = ether_ioctl(ifp, command, data); 1291 break; 1292 } 1293 return(error); 1294 } 1295 1296 static void 1297 pcn_watchdog(struct ifnet *ifp) 1298 { 1299 struct pcn_softc *sc; 1300 1301 sc = ifp->if_softc; 1302 1303 ifp->if_oerrors++; 1304 kprintf("pcn%d: watchdog timeout\n", sc->pcn_unit); 1305 1306 pcn_stop(sc); 1307 pcn_reset(sc); 1308 pcn_init(sc); 1309 1310 if (!ifq_is_empty(&ifp->if_snd)) 1311 if_devstart(ifp); 1312 } 1313 1314 /* 1315 * Stop the adapter and free any mbufs allocated to the 1316 * RX and TX lists. 1317 */ 1318 static void 1319 pcn_stop(struct pcn_softc *sc) 1320 { 1321 int i; 1322 struct ifnet *ifp; 1323 1324 ifp = &sc->arpcom.ac_if; 1325 ifp->if_timer = 0; 1326 1327 callout_stop(&sc->pcn_stat_timer); 1328 PCN_CSR_SETBIT(sc, PCN_CSR_CSR, PCN_CSR_STOP); 1329 sc->pcn_link = 0; 1330 1331 /* 1332 * Free data in the RX lists. 1333 */ 1334 for (i = 0; i < PCN_RX_LIST_CNT; i++) { 1335 if (sc->pcn_cdata.pcn_rx_chain[i] != NULL) { 1336 m_freem(sc->pcn_cdata.pcn_rx_chain[i]); 1337 sc->pcn_cdata.pcn_rx_chain[i] = NULL; 1338 } 1339 } 1340 bzero((char *)&sc->pcn_ldata->pcn_rx_list, 1341 sizeof(sc->pcn_ldata->pcn_rx_list)); 1342 1343 /* 1344 * Free the TX list buffers. 1345 */ 1346 for (i = 0; i < PCN_TX_LIST_CNT; i++) { 1347 if (sc->pcn_cdata.pcn_tx_chain[i] != NULL) { 1348 m_freem(sc->pcn_cdata.pcn_tx_chain[i]); 1349 sc->pcn_cdata.pcn_tx_chain[i] = NULL; 1350 } 1351 } 1352 1353 bzero((char *)&sc->pcn_ldata->pcn_tx_list, 1354 sizeof(sc->pcn_ldata->pcn_tx_list)); 1355 1356 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1357 1358 return; 1359 } 1360 1361 /* 1362 * Stop all chip I/O so that the kernel's probe routines don't 1363 * get confused by errant DMAs when rebooting. 1364 */ 1365 static void 1366 pcn_shutdown(device_t dev) 1367 { 1368 struct pcn_softc *sc = device_get_softc(dev); 1369 struct ifnet *ifp = &sc->arpcom.ac_if; 1370 1371 lwkt_serialize_enter(ifp->if_serializer); 1372 pcn_reset(sc); 1373 pcn_stop(sc); 1374 lwkt_serialize_exit(ifp->if_serializer); 1375 } 1376 1377