1 /* 2 * Copyright (c) 1997, 1998 3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * $FreeBSD$ 33 */ 34 35 /* 36 * VIA Rhine fast ethernet PCI NIC driver 37 * 38 * Supports various network adapters based on the VIA Rhine 39 * and Rhine II PCI controllers, including the D-Link DFE530TX. 40 * Datasheets are available at http://www.via.com.tw. 41 * 42 * Written by Bill Paul <wpaul@ctr.columbia.edu> 43 * Electrical Engineering Department 44 * Columbia University, New York City 45 */ 46 47 /* 48 * The VIA Rhine controllers are similar in some respects to the 49 * the DEC tulip chips, except less complicated. The controller 50 * uses an MII bus and an external physical layer interface. The 51 * receiver has a one entry perfect filter and a 64-bit hash table 52 * multicast filter. Transmit and receive descriptors are similar 53 * to the tulip. 54 * 55 * The Rhine has a serious flaw in its transmit DMA mechanism: 56 * transmit buffers must be longword aligned. Unfortunately, 57 * FreeBSD doesn't guarantee that mbufs will be filled in starting 58 * at longword boundaries, so we have to do a buffer copy before 59 * transmission. 60 */ 61 62 #include <sys/param.h> 63 #include <sys/systm.h> 64 #include <sys/sockio.h> 65 #include <sys/mbuf.h> 66 #include <sys/malloc.h> 67 #include <sys/kernel.h> 68 #include <sys/socket.h> 69 70 #include <net/if.h> 71 #include <net/if_arp.h> 72 #include <net/ethernet.h> 73 #include <net/if_dl.h> 74 #include <net/if_media.h> 75 76 #include <net/bpf.h> 77 78 #include <vm/vm.h> /* for vtophys */ 79 #include <vm/pmap.h> /* for vtophys */ 80 #include <machine/bus_pio.h> 81 #include <machine/bus_memio.h> 82 #include <machine/bus.h> 83 #include <machine/resource.h> 84 #include <sys/bus.h> 85 #include <sys/rman.h> 86 87 #include <dev/mii/mii.h> 88 #include <dev/mii/miivar.h> 89 90 #include <pci/pcireg.h> 91 #include <pci/pcivar.h> 92 93 #define VR_USEIOSPACE 94 95 #include <pci/if_vrreg.h> 96 97 MODULE_DEPEND(vr, miibus, 1, 1, 1); 98 99 /* "controller miibus0" required. See GENERIC if you get errors here. */ 100 #include "miibus_if.h" 101 102 #ifndef lint 103 static const char rcsid[] = 104 "$FreeBSD$"; 105 #endif 106 107 /* 108 * Various supported device vendors/types and their names. 109 */ 110 static struct vr_type vr_devs[] = { 111 { VIA_VENDORID, VIA_DEVICEID_RHINE, 112 "VIA VT3043 Rhine I 10/100BaseTX" }, 113 { VIA_VENDORID, VIA_DEVICEID_RHINE_II, 114 "VIA VT86C100A Rhine II 10/100BaseTX" }, 115 { VIA_VENDORID, VIA_DEVICEID_RHINE_II_2, 116 "VIA VT6102 Rhine II 10/100BaseTX" }, 117 { DELTA_VENDORID, DELTA_DEVICEID_RHINE_II, 118 "Delta Electronics Rhine II 10/100BaseTX" }, 119 { ADDTRON_VENDORID, ADDTRON_DEVICEID_RHINE_II, 120 "Addtron Technology Rhine II 10/100BaseTX" }, 121 { 0, 0, NULL } 122 }; 123 124 static int vr_probe __P((device_t)); 125 static int vr_attach __P((device_t)); 126 static int vr_detach __P((device_t)); 127 128 static int vr_newbuf __P((struct vr_softc *, 129 struct vr_chain_onefrag *, 130 struct mbuf *)); 131 static int vr_encap __P((struct vr_softc *, struct vr_chain *, 132 struct mbuf * )); 133 134 static void vr_rxeof __P((struct vr_softc *)); 135 static void vr_rxeoc __P((struct vr_softc *)); 136 static void vr_txeof __P((struct vr_softc *)); 137 static void vr_txeoc __P((struct vr_softc *)); 138 static void vr_tick __P((void *)); 139 static void vr_intr __P((void *)); 140 static void vr_start __P((struct ifnet *)); 141 static int vr_ioctl __P((struct ifnet *, u_long, caddr_t)); 142 static void vr_init __P((void *)); 143 static void vr_stop __P((struct vr_softc *)); 144 static void vr_watchdog __P((struct ifnet *)); 145 static void vr_shutdown __P((device_t)); 146 static int vr_ifmedia_upd __P((struct ifnet *)); 147 static void vr_ifmedia_sts __P((struct ifnet *, struct ifmediareq *)); 148 149 static void vr_mii_sync __P((struct vr_softc *)); 150 static void vr_mii_send __P((struct vr_softc *, u_int32_t, int)); 151 static int vr_mii_readreg __P((struct vr_softc *, struct vr_mii_frame *)); 152 static int vr_mii_writereg __P((struct vr_softc *, struct vr_mii_frame *)); 153 static int vr_miibus_readreg __P((device_t, int, int)); 154 static int vr_miibus_writereg __P((device_t, int, int, int)); 155 static void vr_miibus_statchg __P((device_t)); 156 157 static void vr_setcfg __P((struct vr_softc *, int)); 158 static u_int8_t vr_calchash __P((u_int8_t *)); 159 static void vr_setmulti __P((struct vr_softc *)); 160 static void vr_reset __P((struct vr_softc *)); 161 static int vr_list_rx_init __P((struct vr_softc *)); 162 static int vr_list_tx_init __P((struct vr_softc *)); 163 164 #ifdef VR_USEIOSPACE 165 #define VR_RES SYS_RES_IOPORT 166 #define VR_RID VR_PCI_LOIO 167 #else 168 #define VR_RES SYS_RES_MEMORY 169 #define VR_RID VR_PCI_LOMEM 170 #endif 171 172 static device_method_t vr_methods[] = { 173 /* Device interface */ 174 DEVMETHOD(device_probe, vr_probe), 175 DEVMETHOD(device_attach, vr_attach), 176 DEVMETHOD(device_detach, vr_detach), 177 DEVMETHOD(device_shutdown, vr_shutdown), 178 179 /* bus interface */ 180 DEVMETHOD(bus_print_child, bus_generic_print_child), 181 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 182 183 /* MII interface */ 184 DEVMETHOD(miibus_readreg, vr_miibus_readreg), 185 DEVMETHOD(miibus_writereg, vr_miibus_writereg), 186 DEVMETHOD(miibus_statchg, vr_miibus_statchg), 187 188 { 0, 0 } 189 }; 190 191 static driver_t vr_driver = { 192 "vr", 193 vr_methods, 194 sizeof(struct vr_softc) 195 }; 196 197 static devclass_t vr_devclass; 198 199 DRIVER_MODULE(if_vr, pci, vr_driver, vr_devclass, 0, 0); 200 DRIVER_MODULE(miibus, vr, miibus_driver, miibus_devclass, 0, 0); 201 202 #define VR_SETBIT(sc, reg, x) \ 203 CSR_WRITE_1(sc, reg, \ 204 CSR_READ_1(sc, reg) | x) 205 206 #define VR_CLRBIT(sc, reg, x) \ 207 CSR_WRITE_1(sc, reg, \ 208 CSR_READ_1(sc, reg) & ~x) 209 210 #define VR_SETBIT16(sc, reg, x) \ 211 CSR_WRITE_2(sc, reg, \ 212 CSR_READ_2(sc, reg) | x) 213 214 #define VR_CLRBIT16(sc, reg, x) \ 215 CSR_WRITE_2(sc, reg, \ 216 CSR_READ_2(sc, reg) & ~x) 217 218 #define VR_SETBIT32(sc, reg, x) \ 219 CSR_WRITE_4(sc, reg, \ 220 CSR_READ_4(sc, reg) | x) 221 222 #define VR_CLRBIT32(sc, reg, x) \ 223 CSR_WRITE_4(sc, reg, \ 224 CSR_READ_4(sc, reg) & ~x) 225 226 #define SIO_SET(x) \ 227 CSR_WRITE_1(sc, VR_MIICMD, \ 228 CSR_READ_1(sc, VR_MIICMD) | x) 229 230 #define SIO_CLR(x) \ 231 CSR_WRITE_1(sc, VR_MIICMD, \ 232 CSR_READ_1(sc, VR_MIICMD) & ~x) 233 234 /* 235 * Sync the PHYs by setting data bit and strobing the clock 32 times. 236 */ 237 static void vr_mii_sync(sc) 238 struct vr_softc *sc; 239 { 240 register int i; 241 242 SIO_SET(VR_MIICMD_DIR|VR_MIICMD_DATAIN); 243 244 for (i = 0; i < 32; i++) { 245 SIO_SET(VR_MIICMD_CLK); 246 DELAY(1); 247 SIO_CLR(VR_MIICMD_CLK); 248 DELAY(1); 249 } 250 251 return; 252 } 253 254 /* 255 * Clock a series of bits through the MII. 256 */ 257 static void vr_mii_send(sc, bits, cnt) 258 struct vr_softc *sc; 259 u_int32_t bits; 260 int cnt; 261 { 262 int i; 263 264 SIO_CLR(VR_MIICMD_CLK); 265 266 for (i = (0x1 << (cnt - 1)); i; i >>= 1) { 267 if (bits & i) { 268 SIO_SET(VR_MIICMD_DATAIN); 269 } else { 270 SIO_CLR(VR_MIICMD_DATAIN); 271 } 272 DELAY(1); 273 SIO_CLR(VR_MIICMD_CLK); 274 DELAY(1); 275 SIO_SET(VR_MIICMD_CLK); 276 } 277 } 278 279 /* 280 * Read an PHY register through the MII. 281 */ 282 static int vr_mii_readreg(sc, frame) 283 struct vr_softc *sc; 284 struct vr_mii_frame *frame; 285 286 { 287 int i, ack; 288 289 VR_LOCK(sc); 290 291 /* 292 * Set up frame for RX. 293 */ 294 frame->mii_stdelim = VR_MII_STARTDELIM; 295 frame->mii_opcode = VR_MII_READOP; 296 frame->mii_turnaround = 0; 297 frame->mii_data = 0; 298 299 CSR_WRITE_1(sc, VR_MIICMD, 0); 300 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM); 301 302 /* 303 * Turn on data xmit. 304 */ 305 SIO_SET(VR_MIICMD_DIR); 306 307 vr_mii_sync(sc); 308 309 /* 310 * Send command/address info. 311 */ 312 vr_mii_send(sc, frame->mii_stdelim, 2); 313 vr_mii_send(sc, frame->mii_opcode, 2); 314 vr_mii_send(sc, frame->mii_phyaddr, 5); 315 vr_mii_send(sc, frame->mii_regaddr, 5); 316 317 /* Idle bit */ 318 SIO_CLR((VR_MIICMD_CLK|VR_MIICMD_DATAIN)); 319 DELAY(1); 320 SIO_SET(VR_MIICMD_CLK); 321 DELAY(1); 322 323 /* Turn off xmit. */ 324 SIO_CLR(VR_MIICMD_DIR); 325 326 /* Check for ack */ 327 SIO_CLR(VR_MIICMD_CLK); 328 DELAY(1); 329 SIO_SET(VR_MIICMD_CLK); 330 DELAY(1); 331 ack = CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT; 332 333 /* 334 * Now try reading data bits. If the ack failed, we still 335 * need to clock through 16 cycles to keep the PHY(s) in sync. 336 */ 337 if (ack) { 338 for(i = 0; i < 16; i++) { 339 SIO_CLR(VR_MIICMD_CLK); 340 DELAY(1); 341 SIO_SET(VR_MIICMD_CLK); 342 DELAY(1); 343 } 344 goto fail; 345 } 346 347 for (i = 0x8000; i; i >>= 1) { 348 SIO_CLR(VR_MIICMD_CLK); 349 DELAY(1); 350 if (!ack) { 351 if (CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT) 352 frame->mii_data |= i; 353 DELAY(1); 354 } 355 SIO_SET(VR_MIICMD_CLK); 356 DELAY(1); 357 } 358 359 fail: 360 361 SIO_CLR(VR_MIICMD_CLK); 362 DELAY(1); 363 SIO_SET(VR_MIICMD_CLK); 364 DELAY(1); 365 366 VR_UNLOCK(sc); 367 368 if (ack) 369 return(1); 370 return(0); 371 } 372 373 /* 374 * Write to a PHY register through the MII. 375 */ 376 static int vr_mii_writereg(sc, frame) 377 struct vr_softc *sc; 378 struct vr_mii_frame *frame; 379 380 { 381 VR_LOCK(sc); 382 383 CSR_WRITE_1(sc, VR_MIICMD, 0); 384 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM); 385 386 /* 387 * Set up frame for TX. 388 */ 389 390 frame->mii_stdelim = VR_MII_STARTDELIM; 391 frame->mii_opcode = VR_MII_WRITEOP; 392 frame->mii_turnaround = VR_MII_TURNAROUND; 393 394 /* 395 * Turn on data output. 396 */ 397 SIO_SET(VR_MIICMD_DIR); 398 399 vr_mii_sync(sc); 400 401 vr_mii_send(sc, frame->mii_stdelim, 2); 402 vr_mii_send(sc, frame->mii_opcode, 2); 403 vr_mii_send(sc, frame->mii_phyaddr, 5); 404 vr_mii_send(sc, frame->mii_regaddr, 5); 405 vr_mii_send(sc, frame->mii_turnaround, 2); 406 vr_mii_send(sc, frame->mii_data, 16); 407 408 /* Idle bit. */ 409 SIO_SET(VR_MIICMD_CLK); 410 DELAY(1); 411 SIO_CLR(VR_MIICMD_CLK); 412 DELAY(1); 413 414 /* 415 * Turn off xmit. 416 */ 417 SIO_CLR(VR_MIICMD_DIR); 418 419 VR_UNLOCK(sc); 420 421 return(0); 422 } 423 424 static int vr_miibus_readreg(dev, phy, reg) 425 device_t dev; 426 int phy, reg; 427 { 428 struct vr_softc *sc; 429 struct vr_mii_frame frame; 430 431 sc = device_get_softc(dev); 432 bzero((char *)&frame, sizeof(frame)); 433 434 frame.mii_phyaddr = phy; 435 frame.mii_regaddr = reg; 436 vr_mii_readreg(sc, &frame); 437 438 return(frame.mii_data); 439 } 440 441 static int vr_miibus_writereg(dev, phy, reg, data) 442 device_t dev; 443 u_int16_t phy, reg, data; 444 { 445 struct vr_softc *sc; 446 struct vr_mii_frame frame; 447 448 sc = device_get_softc(dev); 449 bzero((char *)&frame, sizeof(frame)); 450 451 frame.mii_phyaddr = phy; 452 frame.mii_regaddr = reg; 453 frame.mii_data = data; 454 455 vr_mii_writereg(sc, &frame); 456 457 return(0); 458 } 459 460 static void vr_miibus_statchg(dev) 461 device_t dev; 462 { 463 struct vr_softc *sc; 464 struct mii_data *mii; 465 466 sc = device_get_softc(dev); 467 VR_LOCK(sc); 468 mii = device_get_softc(sc->vr_miibus); 469 vr_setcfg(sc, mii->mii_media_active); 470 VR_UNLOCK(sc); 471 472 return; 473 } 474 475 /* 476 * Calculate CRC of a multicast group address, return the lower 6 bits. 477 */ 478 static u_int8_t vr_calchash(addr) 479 u_int8_t *addr; 480 { 481 u_int32_t crc, carry; 482 int i, j; 483 u_int8_t c; 484 485 /* Compute CRC for the address value. */ 486 crc = 0xFFFFFFFF; /* initial value */ 487 488 for (i = 0; i < 6; i++) { 489 c = *(addr + i); 490 for (j = 0; j < 8; j++) { 491 carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01); 492 crc <<= 1; 493 c >>= 1; 494 if (carry) 495 crc = (crc ^ 0x04c11db6) | carry; 496 } 497 } 498 499 /* return the filter bit position */ 500 return((crc >> 26) & 0x0000003F); 501 } 502 503 /* 504 * Program the 64-bit multicast hash filter. 505 */ 506 static void vr_setmulti(sc) 507 struct vr_softc *sc; 508 { 509 struct ifnet *ifp; 510 int h = 0; 511 u_int32_t hashes[2] = { 0, 0 }; 512 struct ifmultiaddr *ifma; 513 u_int8_t rxfilt; 514 int mcnt = 0; 515 516 ifp = &sc->arpcom.ac_if; 517 518 rxfilt = CSR_READ_1(sc, VR_RXCFG); 519 520 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { 521 rxfilt |= VR_RXCFG_RX_MULTI; 522 CSR_WRITE_1(sc, VR_RXCFG, rxfilt); 523 CSR_WRITE_4(sc, VR_MAR0, 0xFFFFFFFF); 524 CSR_WRITE_4(sc, VR_MAR1, 0xFFFFFFFF); 525 return; 526 } 527 528 /* first, zot all the existing hash bits */ 529 CSR_WRITE_4(sc, VR_MAR0, 0); 530 CSR_WRITE_4(sc, VR_MAR1, 0); 531 532 /* now program new ones */ 533 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 534 if (ifma->ifma_addr->sa_family != AF_LINK) 535 continue; 536 h = vr_calchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); 537 if (h < 32) 538 hashes[0] |= (1 << h); 539 else 540 hashes[1] |= (1 << (h - 32)); 541 mcnt++; 542 } 543 544 if (mcnt) 545 rxfilt |= VR_RXCFG_RX_MULTI; 546 else 547 rxfilt &= ~VR_RXCFG_RX_MULTI; 548 549 CSR_WRITE_4(sc, VR_MAR0, hashes[0]); 550 CSR_WRITE_4(sc, VR_MAR1, hashes[1]); 551 CSR_WRITE_1(sc, VR_RXCFG, rxfilt); 552 553 return; 554 } 555 556 /* 557 * In order to fiddle with the 558 * 'full-duplex' and '100Mbps' bits in the netconfig register, we 559 * first have to put the transmit and/or receive logic in the idle state. 560 */ 561 static void vr_setcfg(sc, media) 562 struct vr_softc *sc; 563 int media; 564 { 565 int restart = 0; 566 567 if (CSR_READ_2(sc, VR_COMMAND) & (VR_CMD_TX_ON|VR_CMD_RX_ON)) { 568 restart = 1; 569 VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_TX_ON|VR_CMD_RX_ON)); 570 } 571 572 if ((media & IFM_GMASK) == IFM_FDX) 573 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX); 574 else 575 VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX); 576 577 if (restart) 578 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON|VR_CMD_RX_ON); 579 580 return; 581 } 582 583 static void vr_reset(sc) 584 struct vr_softc *sc; 585 { 586 register int i; 587 588 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RESET); 589 590 for (i = 0; i < VR_TIMEOUT; i++) { 591 DELAY(10); 592 if (!(CSR_READ_2(sc, VR_COMMAND) & VR_CMD_RESET)) 593 break; 594 } 595 if (i == VR_TIMEOUT) 596 printf("vr%d: reset never completed!\n", sc->vr_unit); 597 598 /* Wait a little while for the chip to get its brains in order. */ 599 DELAY(1000); 600 601 return; 602 } 603 604 /* 605 * Probe for a VIA Rhine chip. Check the PCI vendor and device 606 * IDs against our list and return a device name if we find a match. 607 */ 608 static int vr_probe(dev) 609 device_t dev; 610 { 611 struct vr_type *t; 612 613 t = vr_devs; 614 615 while(t->vr_name != NULL) { 616 if ((pci_get_vendor(dev) == t->vr_vid) && 617 (pci_get_device(dev) == t->vr_did)) { 618 device_set_desc(dev, t->vr_name); 619 return(0); 620 } 621 t++; 622 } 623 624 return(ENXIO); 625 } 626 627 /* 628 * Attach the interface. Allocate softc structures, do ifmedia 629 * setup and ethernet/BPF attach. 630 */ 631 static int vr_attach(dev) 632 device_t dev; 633 { 634 int i; 635 u_char eaddr[ETHER_ADDR_LEN]; 636 u_int32_t command; 637 struct vr_softc *sc; 638 struct ifnet *ifp; 639 int unit, error = 0, rid; 640 641 sc = device_get_softc(dev); 642 unit = device_get_unit(dev); 643 bzero(sc, sizeof(struct vr_softc *)); 644 645 mtx_init(&sc->vr_mtx, device_get_nameunit(dev), MTX_DEF | MTX_RECURSE); 646 VR_LOCK(sc); 647 648 /* 649 * Handle power management nonsense. 650 */ 651 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 652 u_int32_t iobase, membase, irq; 653 654 /* Save important PCI config data. */ 655 iobase = pci_read_config(dev, VR_PCI_LOIO, 4); 656 membase = pci_read_config(dev, VR_PCI_LOMEM, 4); 657 irq = pci_read_config(dev, VR_PCI_INTLINE, 4); 658 659 /* Reset the power state. */ 660 printf("vr%d: chip is in D%d power mode " 661 "-- setting to D0\n", unit, 662 pci_get_powerstate(dev)); 663 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 664 665 /* Restore PCI config data. */ 666 pci_write_config(dev, VR_PCI_LOIO, iobase, 4); 667 pci_write_config(dev, VR_PCI_LOMEM, membase, 4); 668 pci_write_config(dev, VR_PCI_INTLINE, irq, 4); 669 } 670 671 /* 672 * Map control/status registers. 673 */ 674 pci_enable_busmaster(dev); 675 pci_enable_io(dev, PCIM_CMD_PORTEN); 676 pci_enable_io(dev, PCIM_CMD_MEMEN); 677 command = pci_read_config(dev, PCIR_COMMAND, 4); 678 679 #ifdef VR_USEIOSPACE 680 if (!(command & PCIM_CMD_PORTEN)) { 681 printf("vr%d: failed to enable I/O ports!\n", unit); 682 free(sc, M_DEVBUF); 683 goto fail; 684 } 685 #else 686 if (!(command & PCIM_CMD_MEMEN)) { 687 printf("vr%d: failed to enable memory mapping!\n", unit); 688 goto fail; 689 } 690 #endif 691 692 rid = VR_RID; 693 sc->vr_res = bus_alloc_resource(dev, VR_RES, &rid, 694 0, ~0, 1, RF_ACTIVE); 695 696 if (sc->vr_res == NULL) { 697 printf("vr%d: couldn't map ports/memory\n", unit); 698 error = ENXIO; 699 goto fail; 700 } 701 702 sc->vr_btag = rman_get_bustag(sc->vr_res); 703 sc->vr_bhandle = rman_get_bushandle(sc->vr_res); 704 705 /* Allocate interrupt */ 706 rid = 0; 707 sc->vr_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, 708 RF_SHAREABLE | RF_ACTIVE); 709 710 if (sc->vr_irq == NULL) { 711 printf("vr%d: couldn't map interrupt\n", unit); 712 bus_release_resource(dev, VR_RES, VR_RID, sc->vr_res); 713 error = ENXIO; 714 goto fail; 715 } 716 717 error = bus_setup_intr(dev, sc->vr_irq, INTR_TYPE_NET, 718 vr_intr, sc, &sc->vr_intrhand); 719 720 if (error) { 721 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->vr_irq); 722 bus_release_resource(dev, VR_RES, VR_RID, sc->vr_res); 723 printf("vr%d: couldn't set up irq\n", unit); 724 goto fail; 725 } 726 727 /* 728 * Windows may put the chip in suspend mode when it 729 * shuts down. Be sure to kick it in the head to wake it 730 * up again. 731 */ 732 VR_CLRBIT(sc, VR_STICKHW, (VR_STICKHW_DS0|VR_STICKHW_DS1)); 733 734 /* Reset the adapter. */ 735 vr_reset(sc); 736 737 /* 738 * Get station address. The way the Rhine chips work, 739 * you're not allowed to directly access the EEPROM once 740 * they've been programmed a special way. Consequently, 741 * we need to read the node address from the PAR0 and PAR1 742 * registers. 743 */ 744 VR_SETBIT(sc, VR_EECSR, VR_EECSR_LOAD); 745 DELAY(200); 746 for (i = 0; i < ETHER_ADDR_LEN; i++) 747 eaddr[i] = CSR_READ_1(sc, VR_PAR0 + i); 748 749 /* 750 * A Rhine chip was detected. Inform the world. 751 */ 752 printf("vr%d: Ethernet address: %6D\n", unit, eaddr, ":"); 753 754 sc->vr_unit = unit; 755 bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN); 756 757 sc->vr_ldata = contigmalloc(sizeof(struct vr_list_data), M_DEVBUF, 758 M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0); 759 760 if (sc->vr_ldata == NULL) { 761 printf("vr%d: no memory for list buffers!\n", unit); 762 bus_teardown_intr(dev, sc->vr_irq, sc->vr_intrhand); 763 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->vr_irq); 764 bus_release_resource(dev, VR_RES, VR_RID, sc->vr_res); 765 error = ENXIO; 766 goto fail; 767 } 768 769 bzero(sc->vr_ldata, sizeof(struct vr_list_data)); 770 771 ifp = &sc->arpcom.ac_if; 772 ifp->if_softc = sc; 773 ifp->if_unit = unit; 774 ifp->if_name = "vr"; 775 ifp->if_mtu = ETHERMTU; 776 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 777 ifp->if_ioctl = vr_ioctl; 778 ifp->if_output = ether_output; 779 ifp->if_start = vr_start; 780 ifp->if_watchdog = vr_watchdog; 781 ifp->if_init = vr_init; 782 ifp->if_baudrate = 10000000; 783 ifp->if_snd.ifq_maxlen = VR_TX_LIST_CNT - 1; 784 785 /* 786 * Do MII setup. 787 */ 788 if (mii_phy_probe(dev, &sc->vr_miibus, 789 vr_ifmedia_upd, vr_ifmedia_sts)) { 790 printf("vr%d: MII without any phy!\n", sc->vr_unit); 791 bus_teardown_intr(dev, sc->vr_irq, sc->vr_intrhand); 792 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->vr_irq); 793 bus_release_resource(dev, VR_RES, VR_RID, sc->vr_res); 794 contigfree(sc->vr_ldata, 795 sizeof(struct vr_list_data), M_DEVBUF); 796 error = ENXIO; 797 goto fail; 798 } 799 800 callout_handle_init(&sc->vr_stat_ch); 801 802 /* 803 * Call MI attach routine. 804 */ 805 ether_ifattach(ifp, ETHER_BPF_SUPPORTED); 806 VR_UNLOCK(sc); 807 return(0); 808 809 fail: 810 VR_UNLOCK(sc); 811 mtx_destroy(&sc->vr_mtx); 812 813 return(error); 814 } 815 816 static int vr_detach(dev) 817 device_t dev; 818 { 819 struct vr_softc *sc; 820 struct ifnet *ifp; 821 822 sc = device_get_softc(dev); 823 VR_LOCK(sc); 824 ifp = &sc->arpcom.ac_if; 825 826 vr_stop(sc); 827 ether_ifdetach(ifp, ETHER_BPF_SUPPORTED); 828 829 bus_generic_detach(dev); 830 device_delete_child(dev, sc->vr_miibus); 831 832 bus_teardown_intr(dev, sc->vr_irq, sc->vr_intrhand); 833 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->vr_irq); 834 bus_release_resource(dev, VR_RES, VR_RID, sc->vr_res); 835 836 contigfree(sc->vr_ldata, sizeof(struct vr_list_data), M_DEVBUF); 837 838 VR_UNLOCK(sc); 839 mtx_destroy(&sc->vr_mtx); 840 841 return(0); 842 } 843 844 /* 845 * Initialize the transmit descriptors. 846 */ 847 static int vr_list_tx_init(sc) 848 struct vr_softc *sc; 849 { 850 struct vr_chain_data *cd; 851 struct vr_list_data *ld; 852 int i; 853 854 cd = &sc->vr_cdata; 855 ld = sc->vr_ldata; 856 for (i = 0; i < VR_TX_LIST_CNT; i++) { 857 cd->vr_tx_chain[i].vr_ptr = &ld->vr_tx_list[i]; 858 if (i == (VR_TX_LIST_CNT - 1)) 859 cd->vr_tx_chain[i].vr_nextdesc = 860 &cd->vr_tx_chain[0]; 861 else 862 cd->vr_tx_chain[i].vr_nextdesc = 863 &cd->vr_tx_chain[i + 1]; 864 } 865 866 cd->vr_tx_free = &cd->vr_tx_chain[0]; 867 cd->vr_tx_tail = cd->vr_tx_head = NULL; 868 869 return(0); 870 } 871 872 873 /* 874 * Initialize the RX descriptors and allocate mbufs for them. Note that 875 * we arrange the descriptors in a closed ring, so that the last descriptor 876 * points back to the first. 877 */ 878 static int vr_list_rx_init(sc) 879 struct vr_softc *sc; 880 { 881 struct vr_chain_data *cd; 882 struct vr_list_data *ld; 883 int i; 884 885 cd = &sc->vr_cdata; 886 ld = sc->vr_ldata; 887 888 for (i = 0; i < VR_RX_LIST_CNT; i++) { 889 cd->vr_rx_chain[i].vr_ptr = 890 (struct vr_desc *)&ld->vr_rx_list[i]; 891 if (vr_newbuf(sc, &cd->vr_rx_chain[i], NULL) == ENOBUFS) 892 return(ENOBUFS); 893 if (i == (VR_RX_LIST_CNT - 1)) { 894 cd->vr_rx_chain[i].vr_nextdesc = 895 &cd->vr_rx_chain[0]; 896 ld->vr_rx_list[i].vr_next = 897 vtophys(&ld->vr_rx_list[0]); 898 } else { 899 cd->vr_rx_chain[i].vr_nextdesc = 900 &cd->vr_rx_chain[i + 1]; 901 ld->vr_rx_list[i].vr_next = 902 vtophys(&ld->vr_rx_list[i + 1]); 903 } 904 } 905 906 cd->vr_rx_head = &cd->vr_rx_chain[0]; 907 908 return(0); 909 } 910 911 /* 912 * Initialize an RX descriptor and attach an MBUF cluster. 913 * Note: the length fields are only 11 bits wide, which means the 914 * largest size we can specify is 2047. This is important because 915 * MCLBYTES is 2048, so we have to subtract one otherwise we'll 916 * overflow the field and make a mess. 917 */ 918 static int vr_newbuf(sc, c, m) 919 struct vr_softc *sc; 920 struct vr_chain_onefrag *c; 921 struct mbuf *m; 922 { 923 struct mbuf *m_new = NULL; 924 925 if (m == NULL) { 926 MGETHDR(m_new, M_DONTWAIT, MT_DATA); 927 if (m_new == NULL) { 928 printf("vr%d: no memory for rx list " 929 "-- packet dropped!\n", sc->vr_unit); 930 return(ENOBUFS); 931 } 932 933 MCLGET(m_new, M_DONTWAIT); 934 if (!(m_new->m_flags & M_EXT)) { 935 printf("vr%d: no memory for rx list " 936 "-- packet dropped!\n", sc->vr_unit); 937 m_freem(m_new); 938 return(ENOBUFS); 939 } 940 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 941 } else { 942 m_new = m; 943 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 944 m_new->m_data = m_new->m_ext.ext_buf; 945 } 946 947 m_adj(m_new, sizeof(u_int64_t)); 948 949 c->vr_mbuf = m_new; 950 c->vr_ptr->vr_status = VR_RXSTAT; 951 c->vr_ptr->vr_data = vtophys(mtod(m_new, caddr_t)); 952 c->vr_ptr->vr_ctl = VR_RXCTL | VR_RXLEN; 953 954 return(0); 955 } 956 957 /* 958 * A frame has been uploaded: pass the resulting mbuf chain up to 959 * the higher level protocols. 960 */ 961 static void vr_rxeof(sc) 962 struct vr_softc *sc; 963 { 964 struct ether_header *eh; 965 struct mbuf *m; 966 struct ifnet *ifp; 967 struct vr_chain_onefrag *cur_rx; 968 int total_len = 0; 969 u_int32_t rxstat; 970 971 ifp = &sc->arpcom.ac_if; 972 973 while(!((rxstat = sc->vr_cdata.vr_rx_head->vr_ptr->vr_status) & 974 VR_RXSTAT_OWN)) { 975 struct mbuf *m0 = NULL; 976 977 cur_rx = sc->vr_cdata.vr_rx_head; 978 sc->vr_cdata.vr_rx_head = cur_rx->vr_nextdesc; 979 m = cur_rx->vr_mbuf; 980 981 /* 982 * If an error occurs, update stats, clear the 983 * status word and leave the mbuf cluster in place: 984 * it should simply get re-used next time this descriptor 985 * comes up in the ring. 986 */ 987 if (rxstat & VR_RXSTAT_RXERR) { 988 ifp->if_ierrors++; 989 printf("vr%d: rx error: ", sc->vr_unit); 990 switch(rxstat & 0x000000FF) { 991 case VR_RXSTAT_CRCERR: 992 printf("crc error\n"); 993 break; 994 case VR_RXSTAT_FRAMEALIGNERR: 995 printf("frame alignment error\n"); 996 break; 997 case VR_RXSTAT_FIFOOFLOW: 998 printf("FIFO overflow\n"); 999 break; 1000 case VR_RXSTAT_GIANT: 1001 printf("received giant packet\n"); 1002 break; 1003 case VR_RXSTAT_RUNT: 1004 printf("received runt packet\n"); 1005 break; 1006 case VR_RXSTAT_BUSERR: 1007 printf("system bus error\n"); 1008 break; 1009 case VR_RXSTAT_BUFFERR: 1010 printf("rx buffer error\n"); 1011 break; 1012 default: 1013 printf("unknown rx error\n"); 1014 break; 1015 } 1016 vr_newbuf(sc, cur_rx, m); 1017 continue; 1018 } 1019 1020 /* No errors; receive the packet. */ 1021 total_len = VR_RXBYTES(cur_rx->vr_ptr->vr_status); 1022 1023 /* 1024 * XXX The VIA Rhine chip includes the CRC with every 1025 * received frame, and there's no way to turn this 1026 * behavior off (at least, I can't find anything in 1027 * the manual that explains how to do it) so we have 1028 * to trim off the CRC manually. 1029 */ 1030 total_len -= ETHER_CRC_LEN; 1031 1032 m0 = m_devget(mtod(m, char *) - ETHER_ALIGN, 1033 total_len + ETHER_ALIGN, 0, ifp, NULL); 1034 vr_newbuf(sc, cur_rx, m); 1035 if (m0 == NULL) { 1036 ifp->if_ierrors++; 1037 continue; 1038 } 1039 m_adj(m0, ETHER_ALIGN); 1040 m = m0; 1041 1042 ifp->if_ipackets++; 1043 eh = mtod(m, struct ether_header *); 1044 1045 /* Remove header from mbuf and pass it on. */ 1046 m_adj(m, sizeof(struct ether_header)); 1047 ether_input(ifp, eh, m); 1048 } 1049 1050 return; 1051 } 1052 1053 void vr_rxeoc(sc) 1054 struct vr_softc *sc; 1055 { 1056 1057 vr_rxeof(sc); 1058 VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_RX_ON); 1059 CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr)); 1060 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_ON); 1061 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_GO); 1062 1063 return; 1064 } 1065 1066 /* 1067 * A frame was downloaded to the chip. It's safe for us to clean up 1068 * the list buffers. 1069 */ 1070 1071 static void vr_txeof(sc) 1072 struct vr_softc *sc; 1073 { 1074 struct vr_chain *cur_tx; 1075 struct ifnet *ifp; 1076 1077 ifp = &sc->arpcom.ac_if; 1078 1079 /* Clear the timeout timer. */ 1080 ifp->if_timer = 0; 1081 1082 /* Sanity check. */ 1083 if (sc->vr_cdata.vr_tx_head == NULL) 1084 return; 1085 1086 /* 1087 * Go through our tx list and free mbufs for those 1088 * frames that have been transmitted. 1089 */ 1090 while(sc->vr_cdata.vr_tx_head->vr_mbuf != NULL) { 1091 u_int32_t txstat; 1092 1093 cur_tx = sc->vr_cdata.vr_tx_head; 1094 txstat = cur_tx->vr_ptr->vr_status; 1095 1096 if (txstat & VR_TXSTAT_OWN) 1097 break; 1098 1099 if (txstat & VR_TXSTAT_ERRSUM) { 1100 ifp->if_oerrors++; 1101 if (txstat & VR_TXSTAT_DEFER) 1102 ifp->if_collisions++; 1103 if (txstat & VR_TXSTAT_LATECOLL) 1104 ifp->if_collisions++; 1105 } 1106 1107 ifp->if_collisions +=(txstat & VR_TXSTAT_COLLCNT) >> 3; 1108 1109 ifp->if_opackets++; 1110 if (cur_tx->vr_mbuf != NULL) { 1111 m_freem(cur_tx->vr_mbuf); 1112 cur_tx->vr_mbuf = NULL; 1113 } 1114 1115 if (sc->vr_cdata.vr_tx_head == sc->vr_cdata.vr_tx_tail) { 1116 sc->vr_cdata.vr_tx_head = NULL; 1117 sc->vr_cdata.vr_tx_tail = NULL; 1118 break; 1119 } 1120 1121 sc->vr_cdata.vr_tx_head = cur_tx->vr_nextdesc; 1122 } 1123 1124 return; 1125 } 1126 1127 /* 1128 * TX 'end of channel' interrupt handler. 1129 */ 1130 static void vr_txeoc(sc) 1131 struct vr_softc *sc; 1132 { 1133 struct ifnet *ifp; 1134 1135 ifp = &sc->arpcom.ac_if; 1136 1137 ifp->if_timer = 0; 1138 1139 if (sc->vr_cdata.vr_tx_head == NULL) { 1140 ifp->if_flags &= ~IFF_OACTIVE; 1141 sc->vr_cdata.vr_tx_tail = NULL; 1142 } 1143 1144 return; 1145 } 1146 1147 static void vr_tick(xsc) 1148 void *xsc; 1149 { 1150 struct vr_softc *sc; 1151 struct mii_data *mii; 1152 1153 sc = xsc; 1154 VR_LOCK(sc); 1155 mii = device_get_softc(sc->vr_miibus); 1156 mii_tick(mii); 1157 1158 sc->vr_stat_ch = timeout(vr_tick, sc, hz); 1159 1160 VR_UNLOCK(sc); 1161 1162 return; 1163 } 1164 1165 static void vr_intr(arg) 1166 void *arg; 1167 { 1168 struct vr_softc *sc; 1169 struct ifnet *ifp; 1170 u_int16_t status; 1171 1172 sc = arg; 1173 VR_LOCK(sc); 1174 ifp = &sc->arpcom.ac_if; 1175 1176 /* Supress unwanted interrupts. */ 1177 if (!(ifp->if_flags & IFF_UP)) { 1178 vr_stop(sc); 1179 VR_UNLOCK(sc); 1180 return; 1181 } 1182 1183 /* Disable interrupts. */ 1184 CSR_WRITE_2(sc, VR_IMR, 0x0000); 1185 1186 for (;;) { 1187 1188 status = CSR_READ_2(sc, VR_ISR); 1189 if (status) 1190 CSR_WRITE_2(sc, VR_ISR, status); 1191 1192 if ((status & VR_INTRS) == 0) 1193 break; 1194 1195 if (status & VR_ISR_RX_OK) 1196 vr_rxeof(sc); 1197 1198 if ((status & VR_ISR_RX_ERR) || (status & VR_ISR_RX_NOBUF) || 1199 (status & VR_ISR_RX_NOBUF) || (status & VR_ISR_RX_OFLOW) || 1200 (status & VR_ISR_RX_DROPPED)) { 1201 vr_rxeof(sc); 1202 vr_rxeoc(sc); 1203 } 1204 1205 if (status & VR_ISR_TX_OK) { 1206 vr_txeof(sc); 1207 vr_txeoc(sc); 1208 } 1209 1210 if ((status & VR_ISR_TX_UNDERRUN)||(status & VR_ISR_TX_ABRT)){ 1211 ifp->if_oerrors++; 1212 vr_txeof(sc); 1213 if (sc->vr_cdata.vr_tx_head != NULL) { 1214 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON); 1215 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_GO); 1216 } 1217 } 1218 1219 if (status & VR_ISR_BUSERR) { 1220 vr_reset(sc); 1221 vr_init(sc); 1222 } 1223 } 1224 1225 /* Re-enable interrupts. */ 1226 CSR_WRITE_2(sc, VR_IMR, VR_INTRS); 1227 1228 if (ifp->if_snd.ifq_head != NULL) { 1229 vr_start(ifp); 1230 } 1231 1232 VR_UNLOCK(sc); 1233 1234 return; 1235 } 1236 1237 /* 1238 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 1239 * pointers to the fragment pointers. 1240 */ 1241 static int vr_encap(sc, c, m_head) 1242 struct vr_softc *sc; 1243 struct vr_chain *c; 1244 struct mbuf *m_head; 1245 { 1246 int frag = 0; 1247 struct vr_desc *f = NULL; 1248 int total_len; 1249 struct mbuf *m; 1250 1251 m = m_head; 1252 total_len = 0; 1253 1254 /* 1255 * The VIA Rhine wants packet buffers to be longword 1256 * aligned, but very often our mbufs aren't. Rather than 1257 * waste time trying to decide when to copy and when not 1258 * to copy, just do it all the time. 1259 */ 1260 if (m != NULL) { 1261 struct mbuf *m_new = NULL; 1262 1263 MGETHDR(m_new, M_DONTWAIT, MT_DATA); 1264 if (m_new == NULL) { 1265 printf("vr%d: no memory for tx list\n", sc->vr_unit); 1266 return(1); 1267 } 1268 if (m_head->m_pkthdr.len > MHLEN) { 1269 MCLGET(m_new, M_DONTWAIT); 1270 if (!(m_new->m_flags & M_EXT)) { 1271 m_freem(m_new); 1272 printf("vr%d: no memory for tx list\n", 1273 sc->vr_unit); 1274 return(1); 1275 } 1276 } 1277 m_copydata(m_head, 0, m_head->m_pkthdr.len, 1278 mtod(m_new, caddr_t)); 1279 m_new->m_pkthdr.len = m_new->m_len = m_head->m_pkthdr.len; 1280 m_freem(m_head); 1281 m_head = m_new; 1282 /* 1283 * The Rhine chip doesn't auto-pad, so we have to make 1284 * sure to pad short frames out to the minimum frame length 1285 * ourselves. 1286 */ 1287 if (m_head->m_len < VR_MIN_FRAMELEN) { 1288 m_new->m_pkthdr.len += VR_MIN_FRAMELEN - m_new->m_len; 1289 m_new->m_len = m_new->m_pkthdr.len; 1290 } 1291 f = c->vr_ptr; 1292 f->vr_data = vtophys(mtod(m_new, caddr_t)); 1293 f->vr_ctl = total_len = m_new->m_len; 1294 f->vr_ctl |= VR_TXCTL_TLINK|VR_TXCTL_FIRSTFRAG; 1295 f->vr_status = 0; 1296 frag = 1; 1297 } 1298 1299 c->vr_mbuf = m_head; 1300 c->vr_ptr->vr_ctl |= VR_TXCTL_LASTFRAG|VR_TXCTL_FINT; 1301 c->vr_ptr->vr_next = vtophys(c->vr_nextdesc->vr_ptr); 1302 1303 return(0); 1304 } 1305 1306 /* 1307 * Main transmit routine. To avoid having to do mbuf copies, we put pointers 1308 * to the mbuf data regions directly in the transmit lists. We also save a 1309 * copy of the pointers since the transmit list fragment pointers are 1310 * physical addresses. 1311 */ 1312 1313 static void vr_start(ifp) 1314 struct ifnet *ifp; 1315 { 1316 struct vr_softc *sc; 1317 struct mbuf *m_head = NULL; 1318 struct vr_chain *cur_tx = NULL, *start_tx; 1319 1320 sc = ifp->if_softc; 1321 1322 VR_LOCK(sc); 1323 if (ifp->if_flags & IFF_OACTIVE) { 1324 VR_UNLOCK(sc); 1325 return; 1326 } 1327 1328 /* 1329 * Check for an available queue slot. If there are none, 1330 * punt. 1331 */ 1332 if (sc->vr_cdata.vr_tx_free->vr_mbuf != NULL) { 1333 ifp->if_flags |= IFF_OACTIVE; 1334 return; 1335 } 1336 1337 start_tx = sc->vr_cdata.vr_tx_free; 1338 1339 while(sc->vr_cdata.vr_tx_free->vr_mbuf == NULL) { 1340 IF_DEQUEUE(&ifp->if_snd, m_head); 1341 if (m_head == NULL) 1342 break; 1343 1344 /* Pick a descriptor off the free list. */ 1345 cur_tx = sc->vr_cdata.vr_tx_free; 1346 sc->vr_cdata.vr_tx_free = cur_tx->vr_nextdesc; 1347 1348 /* Pack the data into the descriptor. */ 1349 if (vr_encap(sc, cur_tx, m_head)) { 1350 IF_PREPEND(&ifp->if_snd, m_head); 1351 ifp->if_flags |= IFF_OACTIVE; 1352 cur_tx = NULL; 1353 break; 1354 } 1355 1356 if (cur_tx != start_tx) 1357 VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; 1358 1359 /* 1360 * If there's a BPF listener, bounce a copy of this frame 1361 * to him. 1362 */ 1363 if (ifp->if_bpf) 1364 bpf_mtap(ifp, cur_tx->vr_mbuf); 1365 1366 VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; 1367 VR_SETBIT16(sc, VR_COMMAND, /*VR_CMD_TX_ON|*/VR_CMD_TX_GO); 1368 } 1369 1370 /* 1371 * If there are no frames queued, bail. 1372 */ 1373 if (cur_tx == NULL) { 1374 VR_UNLOCK(sc); 1375 return; 1376 } 1377 1378 sc->vr_cdata.vr_tx_tail = cur_tx; 1379 1380 if (sc->vr_cdata.vr_tx_head == NULL) 1381 sc->vr_cdata.vr_tx_head = start_tx; 1382 1383 /* 1384 * Set a timeout in case the chip goes out to lunch. 1385 */ 1386 ifp->if_timer = 5; 1387 VR_UNLOCK(sc); 1388 1389 return; 1390 } 1391 1392 static void vr_init(xsc) 1393 void *xsc; 1394 { 1395 struct vr_softc *sc = xsc; 1396 struct ifnet *ifp = &sc->arpcom.ac_if; 1397 struct mii_data *mii; 1398 int i; 1399 1400 VR_LOCK(sc); 1401 1402 mii = device_get_softc(sc->vr_miibus); 1403 1404 /* 1405 * Cancel pending I/O and free all RX/TX buffers. 1406 */ 1407 vr_stop(sc); 1408 vr_reset(sc); 1409 1410 /* 1411 * Set our station address. 1412 */ 1413 for (i = 0; i < ETHER_ADDR_LEN; i++) 1414 CSR_WRITE_1(sc, VR_PAR0 + i, sc->arpcom.ac_enaddr[i]); 1415 1416 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_THRESH); 1417 VR_SETBIT(sc, VR_RXCFG, VR_RXTHRESH_STORENFWD); 1418 1419 VR_CLRBIT(sc, VR_TXCFG, VR_TXCFG_TX_THRESH); 1420 VR_SETBIT(sc, VR_TXCFG, VR_TXTHRESH_STORENFWD); 1421 1422 /* Init circular RX list. */ 1423 if (vr_list_rx_init(sc) == ENOBUFS) { 1424 printf("vr%d: initialization failed: no " 1425 "memory for rx buffers\n", sc->vr_unit); 1426 vr_stop(sc); 1427 VR_UNLOCK(sc); 1428 return; 1429 } 1430 1431 /* 1432 * Init tx descriptors. 1433 */ 1434 vr_list_tx_init(sc); 1435 1436 /* If we want promiscuous mode, set the allframes bit. */ 1437 if (ifp->if_flags & IFF_PROMISC) 1438 VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC); 1439 else 1440 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC); 1441 1442 /* Set capture broadcast bit to capture broadcast frames. */ 1443 if (ifp->if_flags & IFF_BROADCAST) 1444 VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD); 1445 else 1446 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD); 1447 1448 /* 1449 * Program the multicast filter, if necessary. 1450 */ 1451 vr_setmulti(sc); 1452 1453 /* 1454 * Load the address of the RX list. 1455 */ 1456 CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr)); 1457 1458 /* Enable receiver and transmitter. */ 1459 CSR_WRITE_2(sc, VR_COMMAND, VR_CMD_TX_NOPOLL|VR_CMD_START| 1460 VR_CMD_TX_ON|VR_CMD_RX_ON| 1461 VR_CMD_RX_GO); 1462 1463 CSR_WRITE_4(sc, VR_TXADDR, vtophys(&sc->vr_ldata->vr_tx_list[0])); 1464 1465 /* 1466 * Enable interrupts. 1467 */ 1468 CSR_WRITE_2(sc, VR_ISR, 0xFFFF); 1469 CSR_WRITE_2(sc, VR_IMR, VR_INTRS); 1470 1471 mii_mediachg(mii); 1472 1473 ifp->if_flags |= IFF_RUNNING; 1474 ifp->if_flags &= ~IFF_OACTIVE; 1475 1476 sc->vr_stat_ch = timeout(vr_tick, sc, hz); 1477 1478 VR_UNLOCK(sc); 1479 1480 return; 1481 } 1482 1483 /* 1484 * Set media options. 1485 */ 1486 static int vr_ifmedia_upd(ifp) 1487 struct ifnet *ifp; 1488 { 1489 struct vr_softc *sc; 1490 1491 sc = ifp->if_softc; 1492 1493 if (ifp->if_flags & IFF_UP) 1494 vr_init(sc); 1495 1496 return(0); 1497 } 1498 1499 /* 1500 * Report current media status. 1501 */ 1502 static void vr_ifmedia_sts(ifp, ifmr) 1503 struct ifnet *ifp; 1504 struct ifmediareq *ifmr; 1505 { 1506 struct vr_softc *sc; 1507 struct mii_data *mii; 1508 1509 sc = ifp->if_softc; 1510 mii = device_get_softc(sc->vr_miibus); 1511 mii_pollstat(mii); 1512 ifmr->ifm_active = mii->mii_media_active; 1513 ifmr->ifm_status = mii->mii_media_status; 1514 1515 return; 1516 } 1517 1518 static int vr_ioctl(ifp, command, data) 1519 struct ifnet *ifp; 1520 u_long command; 1521 caddr_t data; 1522 { 1523 struct vr_softc *sc = ifp->if_softc; 1524 struct ifreq *ifr = (struct ifreq *) data; 1525 struct mii_data *mii; 1526 int error = 0; 1527 1528 VR_LOCK(sc); 1529 1530 switch(command) { 1531 case SIOCSIFADDR: 1532 case SIOCGIFADDR: 1533 case SIOCSIFMTU: 1534 error = ether_ioctl(ifp, command, data); 1535 break; 1536 case SIOCSIFFLAGS: 1537 if (ifp->if_flags & IFF_UP) { 1538 vr_init(sc); 1539 } else { 1540 if (ifp->if_flags & IFF_RUNNING) 1541 vr_stop(sc); 1542 } 1543 error = 0; 1544 break; 1545 case SIOCADDMULTI: 1546 case SIOCDELMULTI: 1547 vr_setmulti(sc); 1548 error = 0; 1549 break; 1550 case SIOCGIFMEDIA: 1551 case SIOCSIFMEDIA: 1552 mii = device_get_softc(sc->vr_miibus); 1553 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 1554 break; 1555 default: 1556 error = EINVAL; 1557 break; 1558 } 1559 1560 VR_UNLOCK(sc); 1561 1562 return(error); 1563 } 1564 1565 static void vr_watchdog(ifp) 1566 struct ifnet *ifp; 1567 { 1568 struct vr_softc *sc; 1569 1570 sc = ifp->if_softc; 1571 1572 VR_LOCK(sc); 1573 ifp->if_oerrors++; 1574 printf("vr%d: watchdog timeout\n", sc->vr_unit); 1575 1576 vr_stop(sc); 1577 vr_reset(sc); 1578 vr_init(sc); 1579 1580 if (ifp->if_snd.ifq_head != NULL) 1581 vr_start(ifp); 1582 1583 VR_UNLOCK(sc); 1584 1585 return; 1586 } 1587 1588 /* 1589 * Stop the adapter and free any mbufs allocated to the 1590 * RX and TX lists. 1591 */ 1592 static void vr_stop(sc) 1593 struct vr_softc *sc; 1594 { 1595 register int i; 1596 struct ifnet *ifp; 1597 1598 VR_LOCK(sc); 1599 1600 ifp = &sc->arpcom.ac_if; 1601 ifp->if_timer = 0; 1602 1603 untimeout(vr_tick, sc, sc->vr_stat_ch); 1604 1605 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_STOP); 1606 VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_RX_ON|VR_CMD_TX_ON)); 1607 CSR_WRITE_2(sc, VR_IMR, 0x0000); 1608 CSR_WRITE_4(sc, VR_TXADDR, 0x00000000); 1609 CSR_WRITE_4(sc, VR_RXADDR, 0x00000000); 1610 1611 /* 1612 * Free data in the RX lists. 1613 */ 1614 for (i = 0; i < VR_RX_LIST_CNT; i++) { 1615 if (sc->vr_cdata.vr_rx_chain[i].vr_mbuf != NULL) { 1616 m_freem(sc->vr_cdata.vr_rx_chain[i].vr_mbuf); 1617 sc->vr_cdata.vr_rx_chain[i].vr_mbuf = NULL; 1618 } 1619 } 1620 bzero((char *)&sc->vr_ldata->vr_rx_list, 1621 sizeof(sc->vr_ldata->vr_rx_list)); 1622 1623 /* 1624 * Free the TX list buffers. 1625 */ 1626 for (i = 0; i < VR_TX_LIST_CNT; i++) { 1627 if (sc->vr_cdata.vr_tx_chain[i].vr_mbuf != NULL) { 1628 m_freem(sc->vr_cdata.vr_tx_chain[i].vr_mbuf); 1629 sc->vr_cdata.vr_tx_chain[i].vr_mbuf = NULL; 1630 } 1631 } 1632 1633 bzero((char *)&sc->vr_ldata->vr_tx_list, 1634 sizeof(sc->vr_ldata->vr_tx_list)); 1635 1636 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1637 VR_UNLOCK(sc); 1638 1639 return; 1640 } 1641 1642 /* 1643 * Stop all chip I/O so that the kernel's probe routines don't 1644 * get confused by errant DMAs when rebooting. 1645 */ 1646 static void vr_shutdown(dev) 1647 device_t dev; 1648 { 1649 struct vr_softc *sc; 1650 1651 sc = device_get_softc(dev); 1652 1653 vr_stop(sc); 1654 1655 return; 1656 } 1657