Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/pci/if_vr.c
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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 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: releng/5.2/sys/pci/if_vr.c 122689 2003-11-14 19:00:32Z sam $"); 35 36 /* 37 * VIA Rhine fast ethernet PCI NIC driver 38 * 39 * Supports various network adapters based on the VIA Rhine 40 * and Rhine II PCI controllers, including the D-Link DFE530TX. 41 * Datasheets are available at http://www.via.com.tw. 42 * 43 * Written by Bill Paul <wpaul@ctr.columbia.edu> 44 * Electrical Engineering Department 45 * Columbia University, New York City 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 <dev/pci/pcireg.h> 91 #include <dev/pci/pcivar.h> 92 93 #define VR_USEIOSPACE 94 95 #include <pci/if_vrreg.h> 96 97 MODULE_DEPEND(vr, pci, 1, 1, 1); 98 MODULE_DEPEND(vr, ether, 1, 1, 1); 99 MODULE_DEPEND(vr, miibus, 1, 1, 1); 100 101 /* "controller miibus0" required. See GENERIC if you get errors here. */ 102 #include "miibus_if.h" 103 104 #undef VR_USESWSHIFT 105 106 /* 107 * Various supported device vendors/types and their names. 108 */ 109 static struct vr_type vr_devs[] = { 110 { VIA_VENDORID, VIA_DEVICEID_RHINE, 111 "VIA VT3043 Rhine I 10/100BaseTX" }, 112 { VIA_VENDORID, VIA_DEVICEID_RHINE_II, 113 "VIA VT86C100A Rhine II 10/100BaseTX" }, 114 { VIA_VENDORID, VIA_DEVICEID_RHINE_II_2, 115 "VIA VT6102 Rhine II 10/100BaseTX" }, 116 { VIA_VENDORID, VIA_DEVICEID_RHINE_III, 117 "VIA VT6105 Rhine III 10/100BaseTX" }, 118 { VIA_VENDORID, VIA_DEVICEID_RHINE_III_M, 119 "VIA VT6105M Rhine III 10/100BaseTX" }, 120 { DELTA_VENDORID, DELTA_DEVICEID_RHINE_II, 121 "Delta Electronics Rhine II 10/100BaseTX" }, 122 { ADDTRON_VENDORID, ADDTRON_DEVICEID_RHINE_II, 123 "Addtron Technology Rhine II 10/100BaseTX" }, 124 { 0, 0, NULL } 125 }; 126 127 static int vr_probe (device_t); 128 static int vr_attach (device_t); 129 static int vr_detach (device_t); 130 131 static int vr_newbuf (struct vr_softc *, 132 struct vr_chain_onefrag *, 133 struct mbuf *); 134 static int vr_encap (struct vr_softc *, struct vr_chain *, 135 struct mbuf * ); 136 137 static void vr_rxeof (struct vr_softc *); 138 static void vr_rxeoc (struct vr_softc *); 139 static void vr_txeof (struct vr_softc *); 140 static void vr_txeoc (struct vr_softc *); 141 static void vr_tick (void *); 142 static void vr_intr (void *); 143 static void vr_start (struct ifnet *); 144 static int vr_ioctl (struct ifnet *, u_long, caddr_t); 145 static void vr_init (void *); 146 static void vr_stop (struct vr_softc *); 147 static void vr_watchdog (struct ifnet *); 148 static void vr_shutdown (device_t); 149 static int vr_ifmedia_upd (struct ifnet *); 150 static void vr_ifmedia_sts (struct ifnet *, struct ifmediareq *); 151 152 #ifdef VR_USESWSHIFT 153 static void vr_mii_sync (struct vr_softc *); 154 static void vr_mii_send (struct vr_softc *, u_int32_t, int); 155 #endif 156 static int vr_mii_readreg (struct vr_softc *, struct vr_mii_frame *); 157 static int vr_mii_writereg (struct vr_softc *, struct vr_mii_frame *); 158 static int vr_miibus_readreg (device_t, int, int); 159 static int vr_miibus_writereg (device_t, int, int, int); 160 static void vr_miibus_statchg (device_t); 161 162 static void vr_setcfg (struct vr_softc *, int); 163 static u_int32_t vr_mchash (caddr_t); 164 static void vr_setmulti (struct vr_softc *); 165 static void vr_reset (struct vr_softc *); 166 static int vr_list_rx_init (struct vr_softc *); 167 static int vr_list_tx_init (struct vr_softc *); 168 169 #ifdef VR_USEIOSPACE 170 #define VR_RES SYS_RES_IOPORT 171 #define VR_RID VR_PCI_LOIO 172 #else 173 #define VR_RES SYS_RES_MEMORY 174 #define VR_RID VR_PCI_LOMEM 175 #endif 176 177 static device_method_t vr_methods[] = { 178 /* Device interface */ 179 DEVMETHOD(device_probe, vr_probe), 180 DEVMETHOD(device_attach, vr_attach), 181 DEVMETHOD(device_detach, vr_detach), 182 DEVMETHOD(device_shutdown, vr_shutdown), 183 184 /* bus interface */ 185 DEVMETHOD(bus_print_child, bus_generic_print_child), 186 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 187 188 /* MII interface */ 189 DEVMETHOD(miibus_readreg, vr_miibus_readreg), 190 DEVMETHOD(miibus_writereg, vr_miibus_writereg), 191 DEVMETHOD(miibus_statchg, vr_miibus_statchg), 192 193 { 0, 0 } 194 }; 195 196 static driver_t vr_driver = { 197 "vr", 198 vr_methods, 199 sizeof(struct vr_softc) 200 }; 201 202 static devclass_t vr_devclass; 203 204 DRIVER_MODULE(vr, pci, vr_driver, vr_devclass, 0, 0); 205 DRIVER_MODULE(miibus, vr, miibus_driver, miibus_devclass, 0, 0); 206 207 #define VR_SETBIT(sc, reg, x) \ 208 CSR_WRITE_1(sc, reg, \ 209 CSR_READ_1(sc, reg) | (x)) 210 211 #define VR_CLRBIT(sc, reg, x) \ 212 CSR_WRITE_1(sc, reg, \ 213 CSR_READ_1(sc, reg) & ~(x)) 214 215 #define VR_SETBIT16(sc, reg, x) \ 216 CSR_WRITE_2(sc, reg, \ 217 CSR_READ_2(sc, reg) | (x)) 218 219 #define VR_CLRBIT16(sc, reg, x) \ 220 CSR_WRITE_2(sc, reg, \ 221 CSR_READ_2(sc, reg) & ~(x)) 222 223 #define VR_SETBIT32(sc, reg, x) \ 224 CSR_WRITE_4(sc, reg, \ 225 CSR_READ_4(sc, reg) | (x)) 226 227 #define VR_CLRBIT32(sc, reg, x) \ 228 CSR_WRITE_4(sc, reg, \ 229 CSR_READ_4(sc, reg) & ~(x)) 230 231 #define SIO_SET(x) \ 232 CSR_WRITE_1(sc, VR_MIICMD, \ 233 CSR_READ_1(sc, VR_MIICMD) | (x)) 234 235 #define SIO_CLR(x) \ 236 CSR_WRITE_1(sc, VR_MIICMD, \ 237 CSR_READ_1(sc, VR_MIICMD) & ~(x)) 238 239 #ifdef VR_USESWSHIFT 240 /* 241 * Sync the PHYs by setting data bit and strobing the clock 32 times. 242 */ 243 static void 244 vr_mii_sync(sc) 245 struct vr_softc *sc; 246 { 247 register int i; 248 249 SIO_SET(VR_MIICMD_DIR|VR_MIICMD_DATAIN); 250 251 for (i = 0; i < 32; i++) { 252 SIO_SET(VR_MIICMD_CLK); 253 DELAY(1); 254 SIO_CLR(VR_MIICMD_CLK); 255 DELAY(1); 256 } 257 258 return; 259 } 260 261 /* 262 * Clock a series of bits through the MII. 263 */ 264 static void 265 vr_mii_send(sc, bits, cnt) 266 struct vr_softc *sc; 267 u_int32_t bits; 268 int cnt; 269 { 270 int i; 271 272 SIO_CLR(VR_MIICMD_CLK); 273 274 for (i = (0x1 << (cnt - 1)); i; i >>= 1) { 275 if (bits & i) { 276 SIO_SET(VR_MIICMD_DATAIN); 277 } else { 278 SIO_CLR(VR_MIICMD_DATAIN); 279 } 280 DELAY(1); 281 SIO_CLR(VR_MIICMD_CLK); 282 DELAY(1); 283 SIO_SET(VR_MIICMD_CLK); 284 } 285 } 286 #endif 287 288 /* 289 * Read an PHY register through the MII. 290 */ 291 static int 292 vr_mii_readreg(sc, frame) 293 struct vr_softc *sc; 294 struct vr_mii_frame *frame; 295 296 #ifdef VR_USESWSHIFT 297 { 298 int i, ack; 299 300 VR_LOCK(sc); 301 302 /* 303 * Set up frame for RX. 304 */ 305 frame->mii_stdelim = VR_MII_STARTDELIM; 306 frame->mii_opcode = VR_MII_READOP; 307 frame->mii_turnaround = 0; 308 frame->mii_data = 0; 309 310 CSR_WRITE_1(sc, VR_MIICMD, 0); 311 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM); 312 313 /* 314 * Turn on data xmit. 315 */ 316 SIO_SET(VR_MIICMD_DIR); 317 318 vr_mii_sync(sc); 319 320 /* 321 * Send command/address info. 322 */ 323 vr_mii_send(sc, frame->mii_stdelim, 2); 324 vr_mii_send(sc, frame->mii_opcode, 2); 325 vr_mii_send(sc, frame->mii_phyaddr, 5); 326 vr_mii_send(sc, frame->mii_regaddr, 5); 327 328 /* Idle bit */ 329 SIO_CLR((VR_MIICMD_CLK|VR_MIICMD_DATAIN)); 330 DELAY(1); 331 SIO_SET(VR_MIICMD_CLK); 332 DELAY(1); 333 334 /* Turn off xmit. */ 335 SIO_CLR(VR_MIICMD_DIR); 336 337 /* Check for ack */ 338 SIO_CLR(VR_MIICMD_CLK); 339 DELAY(1); 340 ack = CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT; 341 SIO_SET(VR_MIICMD_CLK); 342 DELAY(1); 343 344 /* 345 * Now try reading data bits. If the ack failed, we still 346 * need to clock through 16 cycles to keep the PHY(s) in sync. 347 */ 348 if (ack) { 349 for(i = 0; i < 16; i++) { 350 SIO_CLR(VR_MIICMD_CLK); 351 DELAY(1); 352 SIO_SET(VR_MIICMD_CLK); 353 DELAY(1); 354 } 355 goto fail; 356 } 357 358 for (i = 0x8000; i; i >>= 1) { 359 SIO_CLR(VR_MIICMD_CLK); 360 DELAY(1); 361 if (!ack) { 362 if (CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT) 363 frame->mii_data |= i; 364 DELAY(1); 365 } 366 SIO_SET(VR_MIICMD_CLK); 367 DELAY(1); 368 } 369 370 fail: 371 372 SIO_CLR(VR_MIICMD_CLK); 373 DELAY(1); 374 SIO_SET(VR_MIICMD_CLK); 375 DELAY(1); 376 377 VR_UNLOCK(sc); 378 379 if (ack) 380 return(1); 381 return(0); 382 } 383 #else 384 { 385 int s, i; 386 387 s = splimp(); 388 389 /* Set the PHY-adress */ 390 CSR_WRITE_1(sc, VR_PHYADDR, (CSR_READ_1(sc, VR_PHYADDR)& 0xe0)| 391 frame->mii_phyaddr); 392 393 /* Set the register-adress */ 394 CSR_WRITE_1(sc, VR_MIIADDR, frame->mii_regaddr); 395 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_READ_ENB); 396 397 for (i = 0; i < 10000; i++) { 398 if ((CSR_READ_1(sc, VR_MIICMD) & VR_MIICMD_READ_ENB) == 0) 399 break; 400 DELAY(1); 401 } 402 403 frame->mii_data = CSR_READ_2(sc, VR_MIIDATA); 404 405 (void)splx(s); 406 407 return(0); 408 } 409 #endif 410 411 412 /* 413 * Write to a PHY register through the MII. 414 */ 415 static int 416 vr_mii_writereg(sc, frame) 417 struct vr_softc *sc; 418 struct vr_mii_frame *frame; 419 420 #ifdef VR_USESWSHIFT 421 { 422 VR_LOCK(sc); 423 424 CSR_WRITE_1(sc, VR_MIICMD, 0); 425 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM); 426 427 /* 428 * Set up frame for TX. 429 */ 430 431 frame->mii_stdelim = VR_MII_STARTDELIM; 432 frame->mii_opcode = VR_MII_WRITEOP; 433 frame->mii_turnaround = VR_MII_TURNAROUND; 434 435 /* 436 * Turn on data output. 437 */ 438 SIO_SET(VR_MIICMD_DIR); 439 440 vr_mii_sync(sc); 441 442 vr_mii_send(sc, frame->mii_stdelim, 2); 443 vr_mii_send(sc, frame->mii_opcode, 2); 444 vr_mii_send(sc, frame->mii_phyaddr, 5); 445 vr_mii_send(sc, frame->mii_regaddr, 5); 446 vr_mii_send(sc, frame->mii_turnaround, 2); 447 vr_mii_send(sc, frame->mii_data, 16); 448 449 /* Idle bit. */ 450 SIO_SET(VR_MIICMD_CLK); 451 DELAY(1); 452 SIO_CLR(VR_MIICMD_CLK); 453 DELAY(1); 454 455 /* 456 * Turn off xmit. 457 */ 458 SIO_CLR(VR_MIICMD_DIR); 459 460 VR_UNLOCK(sc); 461 462 return(0); 463 } 464 #else 465 { 466 int s, i; 467 468 s = splimp(); 469 470 /* Set the PHY-adress */ 471 CSR_WRITE_1(sc, VR_PHYADDR, (CSR_READ_1(sc, VR_PHYADDR)& 0xe0)| 472 frame->mii_phyaddr); 473 474 /* Set the register-adress and data to write */ 475 CSR_WRITE_1(sc, VR_MIIADDR, frame->mii_regaddr); 476 CSR_WRITE_2(sc, VR_MIIDATA, frame->mii_data); 477 478 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_WRITE_ENB); 479 480 for (i = 0; i < 10000; i++) { 481 if ((CSR_READ_1(sc, VR_MIICMD) & VR_MIICMD_WRITE_ENB) == 0) 482 break; 483 DELAY(1); 484 } 485 486 (void)splx(s); 487 488 return(0); 489 } 490 #endif 491 492 static int 493 vr_miibus_readreg(dev, phy, reg) 494 device_t dev; 495 int phy, reg; 496 { 497 struct vr_softc *sc; 498 struct vr_mii_frame frame; 499 500 sc = device_get_softc(dev); 501 502 switch (sc->vr_revid) { 503 case REV_ID_VT6102_APOLLO: 504 if (phy != 1) 505 return 0; 506 default: 507 break; 508 } 509 510 bzero((char *)&frame, sizeof(frame)); 511 512 frame.mii_phyaddr = phy; 513 frame.mii_regaddr = reg; 514 vr_mii_readreg(sc, &frame); 515 516 return(frame.mii_data); 517 } 518 519 static int 520 vr_miibus_writereg(dev, phy, reg, data) 521 device_t dev; 522 u_int16_t phy, reg, data; 523 { 524 struct vr_softc *sc; 525 struct vr_mii_frame frame; 526 527 sc = device_get_softc(dev); 528 529 switch (sc->vr_revid) { 530 case REV_ID_VT6102_APOLLO: 531 if (phy != 1) 532 return 0; 533 default: 534 break; 535 } 536 537 bzero((char *)&frame, sizeof(frame)); 538 539 frame.mii_phyaddr = phy; 540 frame.mii_regaddr = reg; 541 frame.mii_data = data; 542 543 vr_mii_writereg(sc, &frame); 544 545 return(0); 546 } 547 548 static void 549 vr_miibus_statchg(dev) 550 device_t dev; 551 { 552 struct vr_softc *sc; 553 struct mii_data *mii; 554 555 sc = device_get_softc(dev); 556 VR_LOCK(sc); 557 mii = device_get_softc(sc->vr_miibus); 558 vr_setcfg(sc, mii->mii_media_active); 559 VR_UNLOCK(sc); 560 561 return; 562 } 563 564 /* 565 * Calculate CRC of a multicast group address, return the lower 6 bits. 566 */ 567 static u_int32_t 568 vr_mchash(addr) 569 caddr_t addr; 570 { 571 u_int32_t crc, carry; 572 int idx, bit; 573 u_int8_t data; 574 575 /* Compute CRC for the address value. */ 576 crc = 0xFFFFFFFF; /* initial value */ 577 578 for (idx = 0; idx < 6; idx++) { 579 for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1) { 580 carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 581 crc <<= 1; 582 if (carry) 583 crc = (crc ^ 0x04c11db6) | carry; 584 } 585 } 586 587 /* return the filter bit position */ 588 return((crc >> 26) & 0x0000003F); 589 } 590 591 /* 592 * Program the 64-bit multicast hash filter. 593 */ 594 static void 595 vr_setmulti(sc) 596 struct vr_softc *sc; 597 { 598 struct ifnet *ifp; 599 int h = 0; 600 u_int32_t hashes[2] = { 0, 0 }; 601 struct ifmultiaddr *ifma; 602 u_int8_t rxfilt; 603 int mcnt = 0; 604 605 ifp = &sc->arpcom.ac_if; 606 607 rxfilt = CSR_READ_1(sc, VR_RXCFG); 608 609 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { 610 rxfilt |= VR_RXCFG_RX_MULTI; 611 CSR_WRITE_1(sc, VR_RXCFG, rxfilt); 612 CSR_WRITE_4(sc, VR_MAR0, 0xFFFFFFFF); 613 CSR_WRITE_4(sc, VR_MAR1, 0xFFFFFFFF); 614 return; 615 } 616 617 /* first, zot all the existing hash bits */ 618 CSR_WRITE_4(sc, VR_MAR0, 0); 619 CSR_WRITE_4(sc, VR_MAR1, 0); 620 621 /* now program new ones */ 622 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 623 if (ifma->ifma_addr->sa_family != AF_LINK) 624 continue; 625 h = vr_mchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); 626 if (h < 32) 627 hashes[0] |= (1 << h); 628 else 629 hashes[1] |= (1 << (h - 32)); 630 mcnt++; 631 } 632 633 if (mcnt) 634 rxfilt |= VR_RXCFG_RX_MULTI; 635 else 636 rxfilt &= ~VR_RXCFG_RX_MULTI; 637 638 CSR_WRITE_4(sc, VR_MAR0, hashes[0]); 639 CSR_WRITE_4(sc, VR_MAR1, hashes[1]); 640 CSR_WRITE_1(sc, VR_RXCFG, rxfilt); 641 642 return; 643 } 644 645 /* 646 * In order to fiddle with the 647 * 'full-duplex' and '100Mbps' bits in the netconfig register, we 648 * first have to put the transmit and/or receive logic in the idle state. 649 */ 650 static void 651 vr_setcfg(sc, media) 652 struct vr_softc *sc; 653 int media; 654 { 655 int restart = 0; 656 657 if (CSR_READ_2(sc, VR_COMMAND) & (VR_CMD_TX_ON|VR_CMD_RX_ON)) { 658 restart = 1; 659 VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_TX_ON|VR_CMD_RX_ON)); 660 } 661 662 if ((media & IFM_GMASK) == IFM_FDX) 663 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX); 664 else 665 VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX); 666 667 if (restart) 668 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON|VR_CMD_RX_ON); 669 670 return; 671 } 672 673 static void 674 vr_reset(sc) 675 struct vr_softc *sc; 676 { 677 register int i; 678 679 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RESET); 680 681 for (i = 0; i < VR_TIMEOUT; i++) { 682 DELAY(10); 683 if (!(CSR_READ_2(sc, VR_COMMAND) & VR_CMD_RESET)) 684 break; 685 } 686 if (i == VR_TIMEOUT) { 687 if (sc->vr_revid < REV_ID_VT3065_A) 688 printf("vr%d: reset never completed!\n", sc->vr_unit); 689 else { 690 /* Use newer force reset command */ 691 printf("vr%d: Using force reset command.\n", sc->vr_unit); 692 VR_SETBIT(sc, VR_MISC_CR1, VR_MISCCR1_FORSRST); 693 } 694 } 695 696 /* Wait a little while for the chip to get its brains in order. */ 697 DELAY(1000); 698 699 return; 700 } 701 702 /* 703 * Probe for a VIA Rhine chip. Check the PCI vendor and device 704 * IDs against our list and return a device name if we find a match. 705 */ 706 static int 707 vr_probe(dev) 708 device_t dev; 709 { 710 struct vr_type *t; 711 712 t = vr_devs; 713 714 while(t->vr_name != NULL) { 715 if ((pci_get_vendor(dev) == t->vr_vid) && 716 (pci_get_device(dev) == t->vr_did)) { 717 device_set_desc(dev, t->vr_name); 718 return(0); 719 } 720 t++; 721 } 722 723 return(ENXIO); 724 } 725 726 /* 727 * Attach the interface. Allocate softc structures, do ifmedia 728 * setup and ethernet/BPF attach. 729 */ 730 static int 731 vr_attach(dev) 732 device_t dev; 733 { 734 int i; 735 u_char eaddr[ETHER_ADDR_LEN]; 736 struct vr_softc *sc; 737 struct ifnet *ifp; 738 int unit, error = 0, rid; 739 740 sc = device_get_softc(dev); 741 unit = device_get_unit(dev); 742 743 mtx_init(&sc->vr_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 744 MTX_DEF | MTX_RECURSE); 745 #ifndef BURN_BRIDGES 746 /* 747 * Handle power management nonsense. 748 */ 749 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 750 u_int32_t iobase, membase, irq; 751 752 /* Save important PCI config data. */ 753 iobase = pci_read_config(dev, VR_PCI_LOIO, 4); 754 membase = pci_read_config(dev, VR_PCI_LOMEM, 4); 755 irq = pci_read_config(dev, VR_PCI_INTLINE, 4); 756 757 /* Reset the power state. */ 758 printf("vr%d: chip is in D%d power mode " 759 "-- setting to D0\n", unit, 760 pci_get_powerstate(dev)); 761 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 762 763 /* Restore PCI config data. */ 764 pci_write_config(dev, VR_PCI_LOIO, iobase, 4); 765 pci_write_config(dev, VR_PCI_LOMEM, membase, 4); 766 pci_write_config(dev, VR_PCI_INTLINE, irq, 4); 767 } 768 #endif 769 /* 770 * Map control/status registers. 771 */ 772 pci_enable_busmaster(dev); 773 sc->vr_revid = pci_read_config(dev, VR_PCI_REVID, 4) & 0x000000FF; 774 775 rid = VR_RID; 776 sc->vr_res = bus_alloc_resource(dev, VR_RES, &rid, 777 0, ~0, 1, RF_ACTIVE); 778 779 if (sc->vr_res == NULL) { 780 printf("vr%d: couldn't map ports/memory\n", unit); 781 error = ENXIO; 782 goto fail; 783 } 784 785 sc->vr_btag = rman_get_bustag(sc->vr_res); 786 sc->vr_bhandle = rman_get_bushandle(sc->vr_res); 787 788 /* Allocate interrupt */ 789 rid = 0; 790 sc->vr_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, 791 RF_SHAREABLE | RF_ACTIVE); 792 793 if (sc->vr_irq == NULL) { 794 printf("vr%d: couldn't map interrupt\n", unit); 795 error = ENXIO; 796 goto fail; 797 } 798 799 /* 800 * Windows may put the chip in suspend mode when it 801 * shuts down. Be sure to kick it in the head to wake it 802 * up again. 803 */ 804 VR_CLRBIT(sc, VR_STICKHW, (VR_STICKHW_DS0|VR_STICKHW_DS1)); 805 806 /* Reset the adapter. */ 807 vr_reset(sc); 808 809 /* 810 * Turn on bit2 (MIION) in PCI configuration register 0x53 during 811 * initialization and disable AUTOPOLL. 812 */ 813 pci_write_config(dev, VR_PCI_MODE, 814 pci_read_config(dev, VR_PCI_MODE, 4) | (VR_MODE3_MIION << 24), 4); 815 VR_CLRBIT(sc, VR_MIICMD, VR_MIICMD_AUTOPOLL); 816 817 /* 818 * Get station address. The way the Rhine chips work, 819 * you're not allowed to directly access the EEPROM once 820 * they've been programmed a special way. Consequently, 821 * we need to read the node address from the PAR0 and PAR1 822 * registers. 823 */ 824 VR_SETBIT(sc, VR_EECSR, VR_EECSR_LOAD); 825 DELAY(200); 826 for (i = 0; i < ETHER_ADDR_LEN; i++) 827 eaddr[i] = CSR_READ_1(sc, VR_PAR0 + i); 828 829 /* 830 * A Rhine chip was detected. Inform the world. 831 */ 832 printf("vr%d: Ethernet address: %6D\n", unit, eaddr, ":"); 833 834 sc->vr_unit = unit; 835 bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN); 836 837 sc->vr_ldata = contigmalloc(sizeof(struct vr_list_data), M_DEVBUF, 838 M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0); 839 840 if (sc->vr_ldata == NULL) { 841 printf("vr%d: no memory for list buffers!\n", unit); 842 error = ENXIO; 843 goto fail; 844 } 845 846 bzero(sc->vr_ldata, sizeof(struct vr_list_data)); 847 848 ifp = &sc->arpcom.ac_if; 849 ifp->if_softc = sc; 850 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 851 ifp->if_mtu = ETHERMTU; 852 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 853 ifp->if_ioctl = vr_ioctl; 854 ifp->if_output = ether_output; 855 ifp->if_start = vr_start; 856 ifp->if_watchdog = vr_watchdog; 857 ifp->if_init = vr_init; 858 ifp->if_baudrate = 10000000; 859 ifp->if_snd.ifq_maxlen = VR_TX_LIST_CNT - 1; 860 861 /* 862 * Do MII setup. 863 */ 864 if (mii_phy_probe(dev, &sc->vr_miibus, 865 vr_ifmedia_upd, vr_ifmedia_sts)) { 866 printf("vr%d: MII without any phy!\n", sc->vr_unit); 867 error = ENXIO; 868 goto fail; 869 } 870 871 callout_handle_init(&sc->vr_stat_ch); 872 873 /* 874 * Call MI attach routine. 875 */ 876 ether_ifattach(ifp, eaddr); 877 878 /* Hook interrupt last to avoid having to lock softc */ 879 error = bus_setup_intr(dev, sc->vr_irq, INTR_TYPE_NET, 880 vr_intr, sc, &sc->vr_intrhand); 881 882 if (error) { 883 printf("vr%d: couldn't set up irq\n", unit); 884 ether_ifdetach(ifp); 885 goto fail; 886 } 887 888 fail: 889 if (error) 890 vr_detach(dev); 891 892 return(error); 893 } 894 895 /* 896 * Shutdown hardware and free up resources. This can be called any 897 * time after the mutex has been initialized. It is called in both 898 * the error case in attach and the normal detach case so it needs 899 * to be careful about only freeing resources that have actually been 900 * allocated. 901 */ 902 static int 903 vr_detach(dev) 904 device_t dev; 905 { 906 struct vr_softc *sc; 907 struct ifnet *ifp; 908 909 sc = device_get_softc(dev); 910 KASSERT(mtx_initialized(&sc->vr_mtx), ("vr mutex not initialized")); 911 VR_LOCK(sc); 912 ifp = &sc->arpcom.ac_if; 913 914 /* These should only be active if attach succeeded */ 915 if (device_is_attached(dev)) { 916 vr_stop(sc); 917 ether_ifdetach(ifp); 918 } 919 if (sc->vr_miibus) 920 device_delete_child(dev, sc->vr_miibus); 921 bus_generic_detach(dev); 922 923 if (sc->vr_intrhand) 924 bus_teardown_intr(dev, sc->vr_irq, sc->vr_intrhand); 925 if (sc->vr_irq) 926 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->vr_irq); 927 if (sc->vr_res) 928 bus_release_resource(dev, VR_RES, VR_RID, sc->vr_res); 929 930 if (sc->vr_ldata) 931 contigfree(sc->vr_ldata, sizeof(struct vr_list_data), M_DEVBUF); 932 933 VR_UNLOCK(sc); 934 mtx_destroy(&sc->vr_mtx); 935 936 return(0); 937 } 938 939 /* 940 * Initialize the transmit descriptors. 941 */ 942 static int 943 vr_list_tx_init(sc) 944 struct vr_softc *sc; 945 { 946 struct vr_chain_data *cd; 947 struct vr_list_data *ld; 948 int i; 949 950 cd = &sc->vr_cdata; 951 ld = sc->vr_ldata; 952 for (i = 0; i < VR_TX_LIST_CNT; i++) { 953 cd->vr_tx_chain[i].vr_ptr = &ld->vr_tx_list[i]; 954 if (i == (VR_TX_LIST_CNT - 1)) 955 cd->vr_tx_chain[i].vr_nextdesc = 956 &cd->vr_tx_chain[0]; 957 else 958 cd->vr_tx_chain[i].vr_nextdesc = 959 &cd->vr_tx_chain[i + 1]; 960 } 961 962 cd->vr_tx_free = &cd->vr_tx_chain[0]; 963 cd->vr_tx_tail = cd->vr_tx_head = NULL; 964 965 return(0); 966 } 967 968 969 /* 970 * Initialize the RX descriptors and allocate mbufs for them. Note that 971 * we arrange the descriptors in a closed ring, so that the last descriptor 972 * points back to the first. 973 */ 974 static int 975 vr_list_rx_init(sc) 976 struct vr_softc *sc; 977 { 978 struct vr_chain_data *cd; 979 struct vr_list_data *ld; 980 int i; 981 982 cd = &sc->vr_cdata; 983 ld = sc->vr_ldata; 984 985 for (i = 0; i < VR_RX_LIST_CNT; i++) { 986 cd->vr_rx_chain[i].vr_ptr = 987 (struct vr_desc *)&ld->vr_rx_list[i]; 988 if (vr_newbuf(sc, &cd->vr_rx_chain[i], NULL) == ENOBUFS) 989 return(ENOBUFS); 990 if (i == (VR_RX_LIST_CNT - 1)) { 991 cd->vr_rx_chain[i].vr_nextdesc = 992 &cd->vr_rx_chain[0]; 993 ld->vr_rx_list[i].vr_next = 994 vtophys(&ld->vr_rx_list[0]); 995 } else { 996 cd->vr_rx_chain[i].vr_nextdesc = 997 &cd->vr_rx_chain[i + 1]; 998 ld->vr_rx_list[i].vr_next = 999 vtophys(&ld->vr_rx_list[i + 1]); 1000 } 1001 } 1002 1003 cd->vr_rx_head = &cd->vr_rx_chain[0]; 1004 1005 return(0); 1006 } 1007 1008 /* 1009 * Initialize an RX descriptor and attach an MBUF cluster. 1010 * Note: the length fields are only 11 bits wide, which means the 1011 * largest size we can specify is 2047. This is important because 1012 * MCLBYTES is 2048, so we have to subtract one otherwise we'll 1013 * overflow the field and make a mess. 1014 */ 1015 static int 1016 vr_newbuf(sc, c, m) 1017 struct vr_softc *sc; 1018 struct vr_chain_onefrag *c; 1019 struct mbuf *m; 1020 { 1021 struct mbuf *m_new = NULL; 1022 1023 if (m == NULL) { 1024 MGETHDR(m_new, M_DONTWAIT, MT_DATA); 1025 if (m_new == NULL) 1026 return(ENOBUFS); 1027 1028 MCLGET(m_new, M_DONTWAIT); 1029 if (!(m_new->m_flags & M_EXT)) { 1030 m_freem(m_new); 1031 return(ENOBUFS); 1032 } 1033 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 1034 } else { 1035 m_new = m; 1036 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 1037 m_new->m_data = m_new->m_ext.ext_buf; 1038 } 1039 1040 m_adj(m_new, sizeof(u_int64_t)); 1041 1042 c->vr_mbuf = m_new; 1043 c->vr_ptr->vr_status = VR_RXSTAT; 1044 c->vr_ptr->vr_data = vtophys(mtod(m_new, caddr_t)); 1045 c->vr_ptr->vr_ctl = VR_RXCTL | VR_RXLEN; 1046 1047 return(0); 1048 } 1049 1050 /* 1051 * A frame has been uploaded: pass the resulting mbuf chain up to 1052 * the higher level protocols. 1053 */ 1054 static void 1055 vr_rxeof(sc) 1056 struct vr_softc *sc; 1057 { 1058 struct mbuf *m; 1059 struct ifnet *ifp; 1060 struct vr_chain_onefrag *cur_rx; 1061 int total_len = 0; 1062 u_int32_t rxstat; 1063 1064 VR_LOCK_ASSERT(sc); 1065 1066 ifp = &sc->arpcom.ac_if; 1067 1068 while(!((rxstat = sc->vr_cdata.vr_rx_head->vr_ptr->vr_status) & 1069 VR_RXSTAT_OWN)) { 1070 struct mbuf *m0 = NULL; 1071 1072 cur_rx = sc->vr_cdata.vr_rx_head; 1073 sc->vr_cdata.vr_rx_head = cur_rx->vr_nextdesc; 1074 m = cur_rx->vr_mbuf; 1075 1076 /* 1077 * If an error occurs, update stats, clear the 1078 * status word and leave the mbuf cluster in place: 1079 * it should simply get re-used next time this descriptor 1080 * comes up in the ring. 1081 */ 1082 if (rxstat & VR_RXSTAT_RXERR) { 1083 ifp->if_ierrors++; 1084 printf("vr%d: rx error (%02x):", 1085 sc->vr_unit, rxstat & 0x000000ff); 1086 if (rxstat & VR_RXSTAT_CRCERR) 1087 printf(" crc error"); 1088 if (rxstat & VR_RXSTAT_FRAMEALIGNERR) 1089 printf(" frame alignment error\n"); 1090 if (rxstat & VR_RXSTAT_FIFOOFLOW) 1091 printf(" FIFO overflow"); 1092 if (rxstat & VR_RXSTAT_GIANT) 1093 printf(" received giant packet"); 1094 if (rxstat & VR_RXSTAT_RUNT) 1095 printf(" received runt packet"); 1096 if (rxstat & VR_RXSTAT_BUSERR) 1097 printf(" system bus error"); 1098 if (rxstat & VR_RXSTAT_BUFFERR) 1099 printf("rx buffer error"); 1100 printf("\n"); 1101 vr_newbuf(sc, cur_rx, m); 1102 continue; 1103 } 1104 1105 /* No errors; receive the packet. */ 1106 total_len = VR_RXBYTES(cur_rx->vr_ptr->vr_status); 1107 1108 /* 1109 * XXX The VIA Rhine chip includes the CRC with every 1110 * received frame, and there's no way to turn this 1111 * behavior off (at least, I can't find anything in 1112 * the manual that explains how to do it) so we have 1113 * to trim off the CRC manually. 1114 */ 1115 total_len -= ETHER_CRC_LEN; 1116 1117 m0 = m_devget(mtod(m, char *), total_len, ETHER_ALIGN, ifp, 1118 NULL); 1119 vr_newbuf(sc, cur_rx, m); 1120 if (m0 == NULL) { 1121 ifp->if_ierrors++; 1122 continue; 1123 } 1124 m = m0; 1125 1126 ifp->if_ipackets++; 1127 VR_UNLOCK(sc); 1128 (*ifp->if_input)(ifp, m); 1129 VR_LOCK(sc); 1130 } 1131 1132 return; 1133 } 1134 1135 static void 1136 vr_rxeoc(sc) 1137 struct vr_softc *sc; 1138 { 1139 struct ifnet *ifp; 1140 int i; 1141 1142 ifp = &sc->arpcom.ac_if; 1143 1144 ifp->if_ierrors++; 1145 1146 VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_RX_ON); 1147 DELAY(10000); 1148 1149 for (i = 0x400; 1150 i && (CSR_READ_2(sc, VR_COMMAND) & VR_CMD_RX_ON); 1151 i--) 1152 ; /* Wait for receiver to stop */ 1153 1154 if (!i) { 1155 printf("vr%d: rx shutdown error!\n", sc->vr_unit); 1156 sc->vr_flags |= VR_F_RESTART; 1157 return; 1158 } 1159 1160 vr_rxeof(sc); 1161 1162 CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr)); 1163 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_ON); 1164 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_GO); 1165 1166 return; 1167 } 1168 1169 /* 1170 * A frame was downloaded to the chip. It's safe for us to clean up 1171 * the list buffers. 1172 */ 1173 1174 static void 1175 vr_txeof(sc) 1176 struct vr_softc *sc; 1177 { 1178 struct vr_chain *cur_tx; 1179 struct ifnet *ifp; 1180 1181 ifp = &sc->arpcom.ac_if; 1182 1183 /* Reset the timeout timer; if_txeoc will clear it. */ 1184 ifp->if_timer = 5; 1185 1186 /* Sanity check. */ 1187 if (sc->vr_cdata.vr_tx_head == NULL) 1188 return; 1189 1190 /* 1191 * Go through our tx list and free mbufs for those 1192 * frames that have been transmitted. 1193 */ 1194 while(sc->vr_cdata.vr_tx_head->vr_mbuf != NULL) { 1195 u_int32_t txstat; 1196 int i; 1197 1198 cur_tx = sc->vr_cdata.vr_tx_head; 1199 txstat = cur_tx->vr_ptr->vr_status; 1200 1201 if ((txstat & VR_TXSTAT_ABRT) || 1202 (txstat & VR_TXSTAT_UDF)) { 1203 for (i = 0x400; 1204 i && (CSR_READ_2(sc, VR_COMMAND) & VR_CMD_TX_ON); 1205 i--) 1206 ; /* Wait for chip to shutdown */ 1207 if (!i) { 1208 printf("vr%d: tx shutdown timeout\n", sc->vr_unit); 1209 sc->vr_flags |= VR_F_RESTART; 1210 break; 1211 } 1212 VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; 1213 CSR_WRITE_4(sc, VR_TXADDR, vtophys(cur_tx->vr_ptr)); 1214 break; 1215 } 1216 1217 if (txstat & VR_TXSTAT_OWN) 1218 break; 1219 1220 if (txstat & VR_TXSTAT_ERRSUM) { 1221 ifp->if_oerrors++; 1222 if (txstat & VR_TXSTAT_DEFER) 1223 ifp->if_collisions++; 1224 if (txstat & VR_TXSTAT_LATECOLL) 1225 ifp->if_collisions++; 1226 } 1227 1228 ifp->if_collisions +=(txstat & VR_TXSTAT_COLLCNT) >> 3; 1229 1230 ifp->if_opackets++; 1231 if (cur_tx->vr_mbuf != NULL) { 1232 m_freem(cur_tx->vr_mbuf); 1233 cur_tx->vr_mbuf = NULL; 1234 } 1235 1236 if (sc->vr_cdata.vr_tx_head == sc->vr_cdata.vr_tx_tail) { 1237 sc->vr_cdata.vr_tx_head = NULL; 1238 sc->vr_cdata.vr_tx_tail = NULL; 1239 break; 1240 } 1241 1242 sc->vr_cdata.vr_tx_head = cur_tx->vr_nextdesc; 1243 } 1244 1245 return; 1246 } 1247 1248 /* 1249 * TX 'end of channel' interrupt handler. 1250 */ 1251 static void 1252 vr_txeoc(sc) 1253 struct vr_softc *sc; 1254 { 1255 struct ifnet *ifp; 1256 1257 ifp = &sc->arpcom.ac_if; 1258 1259 if (sc->vr_cdata.vr_tx_head == NULL) { 1260 ifp->if_flags &= ~IFF_OACTIVE; 1261 sc->vr_cdata.vr_tx_tail = NULL; 1262 ifp->if_timer = 0; 1263 } 1264 1265 return; 1266 } 1267 1268 static void 1269 vr_tick(xsc) 1270 void *xsc; 1271 { 1272 struct vr_softc *sc; 1273 struct mii_data *mii; 1274 1275 sc = xsc; 1276 VR_LOCK(sc); 1277 if (sc->vr_flags & VR_F_RESTART) { 1278 printf("vr%d: restarting\n", sc->vr_unit); 1279 vr_stop(sc); 1280 vr_reset(sc); 1281 vr_init(sc); 1282 sc->vr_flags &= ~VR_F_RESTART; 1283 } 1284 1285 mii = device_get_softc(sc->vr_miibus); 1286 mii_tick(mii); 1287 1288 sc->vr_stat_ch = timeout(vr_tick, sc, hz); 1289 1290 VR_UNLOCK(sc); 1291 1292 return; 1293 } 1294 1295 static void 1296 vr_intr(arg) 1297 void *arg; 1298 { 1299 struct vr_softc *sc; 1300 struct ifnet *ifp; 1301 u_int16_t status; 1302 1303 sc = arg; 1304 VR_LOCK(sc); 1305 ifp = &sc->arpcom.ac_if; 1306 1307 /* Supress unwanted interrupts. */ 1308 if (!(ifp->if_flags & IFF_UP)) { 1309 vr_stop(sc); 1310 VR_UNLOCK(sc); 1311 return; 1312 } 1313 1314 /* Disable interrupts. */ 1315 CSR_WRITE_2(sc, VR_IMR, 0x0000); 1316 1317 for (;;) { 1318 1319 status = CSR_READ_2(sc, VR_ISR); 1320 if (status) 1321 CSR_WRITE_2(sc, VR_ISR, status); 1322 1323 if ((status & VR_INTRS) == 0) 1324 break; 1325 1326 if (status & VR_ISR_RX_OK) 1327 vr_rxeof(sc); 1328 1329 if (status & VR_ISR_RX_DROPPED) { 1330 printf("vr%d: rx packet lost\n", sc->vr_unit); 1331 ifp->if_ierrors++; 1332 } 1333 1334 if ((status & VR_ISR_RX_ERR) || (status & VR_ISR_RX_NOBUF) || 1335 (status & VR_ISR_RX_NOBUF) || (status & VR_ISR_RX_OFLOW)) { 1336 printf("vr%d: receive error (%04x)", 1337 sc->vr_unit, status); 1338 if (status & VR_ISR_RX_NOBUF) 1339 printf(" no buffers"); 1340 if (status & VR_ISR_RX_OFLOW) 1341 printf(" overflow"); 1342 if (status & VR_ISR_RX_DROPPED) 1343 printf(" packet lost"); 1344 printf("\n"); 1345 vr_rxeoc(sc); 1346 } 1347 1348 if ((status & VR_ISR_BUSERR) || (status & VR_ISR_TX_UNDERRUN)) { 1349 vr_reset(sc); 1350 vr_init(sc); 1351 break; 1352 } 1353 1354 if ((status & VR_ISR_TX_OK) || (status & VR_ISR_TX_ABRT) || 1355 (status & VR_ISR_TX_ABRT2) || (status & VR_ISR_UDFI)) { 1356 vr_txeof(sc); 1357 if ((status & VR_ISR_UDFI) || 1358 (status & VR_ISR_TX_ABRT2) || 1359 (status & VR_ISR_TX_ABRT)) { 1360 ifp->if_oerrors++; 1361 if (sc->vr_cdata.vr_tx_head != NULL) { 1362 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON); 1363 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_GO); 1364 } 1365 } else 1366 vr_txeoc(sc); 1367 } 1368 1369 } 1370 1371 /* Re-enable interrupts. */ 1372 CSR_WRITE_2(sc, VR_IMR, VR_INTRS); 1373 1374 if (ifp->if_snd.ifq_head != NULL) { 1375 vr_start(ifp); 1376 } 1377 1378 VR_UNLOCK(sc); 1379 1380 return; 1381 } 1382 1383 /* 1384 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 1385 * pointers to the fragment pointers. 1386 */ 1387 static int 1388 vr_encap(sc, c, m_head) 1389 struct vr_softc *sc; 1390 struct vr_chain *c; 1391 struct mbuf *m_head; 1392 { 1393 int frag = 0; 1394 struct vr_desc *f = NULL; 1395 int total_len; 1396 struct mbuf *m; 1397 1398 m = m_head; 1399 total_len = 0; 1400 1401 /* 1402 * The VIA Rhine wants packet buffers to be longword 1403 * aligned, but very often our mbufs aren't. Rather than 1404 * waste time trying to decide when to copy and when not 1405 * to copy, just do it all the time. 1406 */ 1407 if (m != NULL) { 1408 struct mbuf *m_new = NULL; 1409 1410 m_new = m_defrag(m_head, M_DONTWAIT); 1411 if (m_new == NULL) { 1412 return(1); 1413 } 1414 1415 m_head = m_new; 1416 /* 1417 * The Rhine chip doesn't auto-pad, so we have to make 1418 * sure to pad short frames out to the minimum frame length 1419 * ourselves. 1420 */ 1421 if (m_head->m_len < VR_MIN_FRAMELEN) { 1422 m_new->m_pkthdr.len += VR_MIN_FRAMELEN - m_new->m_len; 1423 m_new->m_len = m_new->m_pkthdr.len; 1424 } 1425 f = c->vr_ptr; 1426 f->vr_data = vtophys(mtod(m_new, caddr_t)); 1427 f->vr_ctl = total_len = m_new->m_len; 1428 f->vr_ctl |= VR_TXCTL_TLINK|VR_TXCTL_FIRSTFRAG; 1429 f->vr_status = 0; 1430 frag = 1; 1431 } 1432 1433 c->vr_mbuf = m_head; 1434 c->vr_ptr->vr_ctl |= VR_TXCTL_LASTFRAG|VR_TXCTL_FINT; 1435 c->vr_ptr->vr_next = vtophys(c->vr_nextdesc->vr_ptr); 1436 1437 return(0); 1438 } 1439 1440 /* 1441 * Main transmit routine. To avoid having to do mbuf copies, we put pointers 1442 * to the mbuf data regions directly in the transmit lists. We also save a 1443 * copy of the pointers since the transmit list fragment pointers are 1444 * physical addresses. 1445 */ 1446 1447 static void 1448 vr_start(ifp) 1449 struct ifnet *ifp; 1450 { 1451 struct vr_softc *sc; 1452 struct mbuf *m_head = NULL; 1453 struct vr_chain *cur_tx = NULL, *start_tx, *prev_tx; 1454 1455 sc = ifp->if_softc; 1456 1457 VR_LOCK(sc); 1458 1459 /* 1460 * Check for an available queue slot. If there are none, 1461 * punt. 1462 */ 1463 if (sc->vr_cdata.vr_tx_free->vr_mbuf != NULL) { 1464 VR_UNLOCK(sc); 1465 return; 1466 } 1467 1468 start_tx = sc->vr_cdata.vr_tx_free; 1469 1470 while(sc->vr_cdata.vr_tx_free->vr_mbuf == NULL) { 1471 IF_DEQUEUE(&ifp->if_snd, m_head); 1472 if (m_head == NULL) 1473 break; 1474 1475 /* Pick a descriptor off the free list. */ 1476 prev_tx = cur_tx; 1477 cur_tx = sc->vr_cdata.vr_tx_free; 1478 sc->vr_cdata.vr_tx_free = cur_tx->vr_nextdesc; 1479 1480 /* Pack the data into the descriptor. */ 1481 if (vr_encap(sc, cur_tx, m_head)) { 1482 /* Rollback, send what we were able to encap. */ 1483 IF_PREPEND(&ifp->if_snd, m_head); 1484 sc->vr_cdata.vr_tx_free = cur_tx; 1485 cur_tx = prev_tx; 1486 break; 1487 } 1488 1489 if (cur_tx != start_tx) 1490 VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; 1491 1492 /* 1493 * If there's a BPF listener, bounce a copy of this frame 1494 * to him. 1495 */ 1496 BPF_MTAP(ifp, cur_tx->vr_mbuf); 1497 1498 VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; 1499 } 1500 1501 /* 1502 * If there are no frames queued, bail. 1503 */ 1504 if (cur_tx == NULL) { 1505 VR_UNLOCK(sc); 1506 return; 1507 } 1508 1509 sc->vr_cdata.vr_tx_tail = cur_tx; 1510 1511 if (sc->vr_cdata.vr_tx_head == NULL) 1512 sc->vr_cdata.vr_tx_head = start_tx; 1513 1514 /* Tell the chip to start transmitting. */ 1515 VR_SETBIT16(sc, VR_COMMAND, /*VR_CMD_TX_ON|*/VR_CMD_TX_GO); 1516 1517 /* 1518 * Set a timeout in case the chip goes out to lunch. 1519 */ 1520 ifp->if_timer = 5; 1521 VR_UNLOCK(sc); 1522 1523 return; 1524 } 1525 1526 static void 1527 vr_init(xsc) 1528 void *xsc; 1529 { 1530 struct vr_softc *sc = xsc; 1531 struct ifnet *ifp = &sc->arpcom.ac_if; 1532 struct mii_data *mii; 1533 int i; 1534 1535 VR_LOCK(sc); 1536 1537 mii = device_get_softc(sc->vr_miibus); 1538 1539 /* 1540 * Cancel pending I/O and free all RX/TX buffers. 1541 */ 1542 vr_stop(sc); 1543 vr_reset(sc); 1544 1545 /* 1546 * Set our station address. 1547 */ 1548 for (i = 0; i < ETHER_ADDR_LEN; i++) 1549 CSR_WRITE_1(sc, VR_PAR0 + i, sc->arpcom.ac_enaddr[i]); 1550 1551 /* Set DMA size */ 1552 VR_CLRBIT(sc, VR_BCR0, VR_BCR0_DMA_LENGTH); 1553 VR_SETBIT(sc, VR_BCR0, VR_BCR0_DMA_STORENFWD); 1554 1555 /* 1556 * BCR0 and BCR1 can override the RXCFG and TXCFG registers, 1557 * so we must set both. 1558 */ 1559 VR_CLRBIT(sc, VR_BCR0, VR_BCR0_RX_THRESH); 1560 VR_SETBIT(sc, VR_BCR0, VR_BCR0_RXTHRESH128BYTES); 1561 1562 VR_CLRBIT(sc, VR_BCR1, VR_BCR1_TX_THRESH); 1563 VR_SETBIT(sc, VR_BCR1, VR_BCR1_TXTHRESHSTORENFWD); 1564 1565 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_THRESH); 1566 VR_SETBIT(sc, VR_RXCFG, VR_RXTHRESH_128BYTES); 1567 1568 VR_CLRBIT(sc, VR_TXCFG, VR_TXCFG_TX_THRESH); 1569 VR_SETBIT(sc, VR_TXCFG, VR_TXTHRESH_STORENFWD); 1570 1571 /* Init circular RX list. */ 1572 if (vr_list_rx_init(sc) == ENOBUFS) { 1573 printf("vr%d: initialization failed: no " 1574 "memory for rx buffers\n", sc->vr_unit); 1575 vr_stop(sc); 1576 VR_UNLOCK(sc); 1577 return; 1578 } 1579 1580 /* 1581 * Init tx descriptors. 1582 */ 1583 vr_list_tx_init(sc); 1584 1585 /* If we want promiscuous mode, set the allframes bit. */ 1586 if (ifp->if_flags & IFF_PROMISC) 1587 VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC); 1588 else 1589 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC); 1590 1591 /* Set capture broadcast bit to capture broadcast frames. */ 1592 if (ifp->if_flags & IFF_BROADCAST) 1593 VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD); 1594 else 1595 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD); 1596 1597 /* 1598 * Program the multicast filter, if necessary. 1599 */ 1600 vr_setmulti(sc); 1601 1602 /* 1603 * Load the address of the RX list. 1604 */ 1605 CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr)); 1606 1607 /* Enable receiver and transmitter. */ 1608 CSR_WRITE_2(sc, VR_COMMAND, VR_CMD_TX_NOPOLL|VR_CMD_START| 1609 VR_CMD_TX_ON|VR_CMD_RX_ON| 1610 VR_CMD_RX_GO); 1611 1612 CSR_WRITE_4(sc, VR_TXADDR, vtophys(&sc->vr_ldata->vr_tx_list[0])); 1613 1614 /* 1615 * Enable interrupts. 1616 */ 1617 CSR_WRITE_2(sc, VR_ISR, 0xFFFF); 1618 CSR_WRITE_2(sc, VR_IMR, VR_INTRS); 1619 1620 mii_mediachg(mii); 1621 1622 ifp->if_flags |= IFF_RUNNING; 1623 ifp->if_flags &= ~IFF_OACTIVE; 1624 1625 sc->vr_stat_ch = timeout(vr_tick, sc, hz); 1626 1627 VR_UNLOCK(sc); 1628 1629 return; 1630 } 1631 1632 /* 1633 * Set media options. 1634 */ 1635 static int 1636 vr_ifmedia_upd(ifp) 1637 struct ifnet *ifp; 1638 { 1639 struct vr_softc *sc; 1640 1641 sc = ifp->if_softc; 1642 1643 if (ifp->if_flags & IFF_UP) 1644 vr_init(sc); 1645 1646 return(0); 1647 } 1648 1649 /* 1650 * Report current media status. 1651 */ 1652 static void 1653 vr_ifmedia_sts(ifp, ifmr) 1654 struct ifnet *ifp; 1655 struct ifmediareq *ifmr; 1656 { 1657 struct vr_softc *sc; 1658 struct mii_data *mii; 1659 1660 sc = ifp->if_softc; 1661 mii = device_get_softc(sc->vr_miibus); 1662 mii_pollstat(mii); 1663 ifmr->ifm_active = mii->mii_media_active; 1664 ifmr->ifm_status = mii->mii_media_status; 1665 1666 return; 1667 } 1668 1669 static int 1670 vr_ioctl(ifp, command, data) 1671 struct ifnet *ifp; 1672 u_long command; 1673 caddr_t data; 1674 { 1675 struct vr_softc *sc = ifp->if_softc; 1676 struct ifreq *ifr = (struct ifreq *) data; 1677 struct mii_data *mii; 1678 int error = 0; 1679 1680 VR_LOCK(sc); 1681 1682 switch(command) { 1683 case SIOCSIFFLAGS: 1684 if (ifp->if_flags & IFF_UP) { 1685 vr_init(sc); 1686 } else { 1687 if (ifp->if_flags & IFF_RUNNING) 1688 vr_stop(sc); 1689 } 1690 error = 0; 1691 break; 1692 case SIOCADDMULTI: 1693 case SIOCDELMULTI: 1694 vr_setmulti(sc); 1695 error = 0; 1696 break; 1697 case SIOCGIFMEDIA: 1698 case SIOCSIFMEDIA: 1699 mii = device_get_softc(sc->vr_miibus); 1700 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 1701 break; 1702 default: 1703 error = ether_ioctl(ifp, command, data); 1704 break; 1705 } 1706 1707 VR_UNLOCK(sc); 1708 1709 return(error); 1710 } 1711 1712 static void 1713 vr_watchdog(ifp) 1714 struct ifnet *ifp; 1715 { 1716 struct vr_softc *sc; 1717 1718 sc = ifp->if_softc; 1719 1720 VR_LOCK(sc); 1721 ifp->if_oerrors++; 1722 printf("vr%d: watchdog timeout\n", sc->vr_unit); 1723 1724 vr_stop(sc); 1725 vr_reset(sc); 1726 vr_init(sc); 1727 1728 if (ifp->if_snd.ifq_head != NULL) 1729 vr_start(ifp); 1730 1731 VR_UNLOCK(sc); 1732 1733 return; 1734 } 1735 1736 /* 1737 * Stop the adapter and free any mbufs allocated to the 1738 * RX and TX lists. 1739 */ 1740 static void 1741 vr_stop(sc) 1742 struct vr_softc *sc; 1743 { 1744 register int i; 1745 struct ifnet *ifp; 1746 1747 VR_LOCK(sc); 1748 1749 ifp = &sc->arpcom.ac_if; 1750 ifp->if_timer = 0; 1751 1752 untimeout(vr_tick, sc, sc->vr_stat_ch); 1753 1754 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_STOP); 1755 VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_RX_ON|VR_CMD_TX_ON)); 1756 CSR_WRITE_2(sc, VR_IMR, 0x0000); 1757 CSR_WRITE_4(sc, VR_TXADDR, 0x00000000); 1758 CSR_WRITE_4(sc, VR_RXADDR, 0x00000000); 1759 1760 /* 1761 * Free data in the RX lists. 1762 */ 1763 for (i = 0; i < VR_RX_LIST_CNT; i++) { 1764 if (sc->vr_cdata.vr_rx_chain[i].vr_mbuf != NULL) { 1765 m_freem(sc->vr_cdata.vr_rx_chain[i].vr_mbuf); 1766 sc->vr_cdata.vr_rx_chain[i].vr_mbuf = NULL; 1767 } 1768 } 1769 bzero((char *)&sc->vr_ldata->vr_rx_list, 1770 sizeof(sc->vr_ldata->vr_rx_list)); 1771 1772 /* 1773 * Free the TX list buffers. 1774 */ 1775 for (i = 0; i < VR_TX_LIST_CNT; i++) { 1776 if (sc->vr_cdata.vr_tx_chain[i].vr_mbuf != NULL) { 1777 m_freem(sc->vr_cdata.vr_tx_chain[i].vr_mbuf); 1778 sc->vr_cdata.vr_tx_chain[i].vr_mbuf = NULL; 1779 } 1780 } 1781 1782 bzero((char *)&sc->vr_ldata->vr_tx_list, 1783 sizeof(sc->vr_ldata->vr_tx_list)); 1784 1785 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1786 VR_UNLOCK(sc); 1787 1788 return; 1789 } 1790 1791 /* 1792 * Stop all chip I/O so that the kernel's probe routines don't 1793 * get confused by errant DMAs when rebooting. 1794 */ 1795 static void 1796 vr_shutdown(dev) 1797 device_t dev; 1798 { 1799 struct vr_softc *sc; 1800 1801 sc = device_get_softc(dev); 1802 1803 vr_stop(sc); 1804 1805 return; 1806 }
Cache object: 4b230e91702cd26215547f9a5c8622ad
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