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: src/sys/pci/if_vr.c,v 1.26.2.13 2003/02/06 04:46:20 silby Exp $ 33 * $DragonFly: src/sys/dev/netif/vr/if_vr.c,v 1.41 2005/12/31 14:08:00 sephe Exp $ 34 */ 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 /* 49 * The VIA Rhine controllers are similar in some respects to the 50 * the DEC tulip chips, except less complicated. The controller 51 * uses an MII bus and an external physical layer interface. The 52 * receiver has a one entry perfect filter and a 64-bit hash table 53 * multicast filter. Transmit and receive descriptors are similar 54 * to the tulip. 55 * 56 * The Rhine has a serious flaw in its transmit DMA mechanism: 57 * transmit buffers must be longword aligned. Unfortunately, 58 * FreeBSD doesn't guarantee that mbufs will be filled in starting 59 * at longword boundaries, so we have to do a buffer copy before 60 * transmission. 61 */ 62 63 #include "opt_polling.h" 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/sockio.h> 68 #include <sys/mbuf.h> 69 #include <sys/malloc.h> 70 #include <sys/kernel.h> 71 #include <sys/socket.h> 72 #include <sys/serialize.h> 73 #include <sys/thread2.h> 74 75 #include <net/if.h> 76 #include <net/ifq_var.h> 77 #include <net/if_arp.h> 78 #include <net/ethernet.h> 79 #include <net/if_dl.h> 80 #include <net/if_media.h> 81 82 #include <net/bpf.h> 83 84 #include <vm/vm.h> /* for vtophys */ 85 #include <vm/pmap.h> /* for vtophys */ 86 #include <machine/bus_pio.h> 87 #include <machine/bus_memio.h> 88 #include <machine/bus.h> 89 #include <machine/resource.h> 90 #include <sys/bus.h> 91 #include <sys/rman.h> 92 93 #include <dev/netif/mii_layer/mii.h> 94 #include <dev/netif/mii_layer/miivar.h> 95 96 #include <bus/pci/pcireg.h> 97 #include <bus/pci/pcivar.h> 98 99 #define VR_USEIOSPACE 100 101 #include <dev/netif/vr/if_vrreg.h> 102 103 /* "controller miibus0" required. See GENERIC if you get errors here. */ 104 #include "miibus_if.h" 105 106 #undef VR_USESWSHIFT 107 108 /* 109 * Various supported device vendors/types and their names. 110 */ 111 static struct vr_type vr_devs[] = { 112 { VIA_VENDORID, VIA_DEVICEID_RHINE, 113 "VIA VT3043 Rhine I 10/100BaseTX" }, 114 { VIA_VENDORID, VIA_DEVICEID_RHINE_II, 115 "VIA VT86C100A Rhine II 10/100BaseTX" }, 116 { VIA_VENDORID, VIA_DEVICEID_RHINE_II_2, 117 "VIA VT6102 Rhine II 10/100BaseTX" }, 118 { VIA_VENDORID, VIA_DEVICEID_RHINE_III, 119 "VIA VT6105 Rhine III 10/100BaseTX" }, 120 { VIA_VENDORID, VIA_DEVICEID_RHINE_III_M, 121 "VIA VT6105M Rhine III 10/100BaseTX" }, 122 { DELTA_VENDORID, DELTA_DEVICEID_RHINE_II, 123 "Delta Electronics Rhine II 10/100BaseTX" }, 124 { ADDTRON_VENDORID, ADDTRON_DEVICEID_RHINE_II, 125 "Addtron Technology Rhine II 10/100BaseTX" }, 126 { 0, 0, NULL } 127 }; 128 129 static int vr_probe(device_t); 130 static int vr_attach(device_t); 131 static int vr_detach(device_t); 132 133 static int vr_newbuf(struct vr_softc *, struct vr_chain_onefrag *, 134 struct mbuf *); 135 static int vr_encap(struct vr_softc *, int, 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, struct ucred *); 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 *, uint32_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 void vr_setmulti(struct vr_softc *); 164 static void vr_reset(struct vr_softc *); 165 static int vr_list_rx_init(struct vr_softc *); 166 static int vr_list_tx_init(struct vr_softc *); 167 #ifdef DEVICE_POLLING 168 static void vr_poll(struct ifnet *ifp, enum poll_cmd cmd, int count); 169 #endif 170 171 #ifdef VR_USEIOSPACE 172 #define VR_RES SYS_RES_IOPORT 173 #define VR_RID VR_PCI_LOIO 174 #else 175 #define VR_RES SYS_RES_MEMORY 176 #define VR_RID VR_PCI_LOMEM 177 #endif 178 179 static device_method_t vr_methods[] = { 180 /* Device interface */ 181 DEVMETHOD(device_probe, vr_probe), 182 DEVMETHOD(device_attach, vr_attach), 183 DEVMETHOD(device_detach, vr_detach), 184 DEVMETHOD(device_shutdown, vr_shutdown), 185 186 /* bus interface */ 187 DEVMETHOD(bus_print_child, bus_generic_print_child), 188 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 189 190 /* MII interface */ 191 DEVMETHOD(miibus_readreg, vr_miibus_readreg), 192 DEVMETHOD(miibus_writereg, vr_miibus_writereg), 193 DEVMETHOD(miibus_statchg, vr_miibus_statchg), 194 195 { 0, 0 } 196 }; 197 198 static driver_t vr_driver = { 199 "vr", 200 vr_methods, 201 sizeof(struct vr_softc) 202 }; 203 204 static devclass_t vr_devclass; 205 206 DECLARE_DUMMY_MODULE(if_vr); 207 DRIVER_MODULE(if_vr, pci, vr_driver, vr_devclass, 0, 0); 208 DRIVER_MODULE(miibus, vr, miibus_driver, miibus_devclass, 0, 0); 209 210 #define VR_SETBIT(sc, reg, x) \ 211 CSR_WRITE_1(sc, reg, \ 212 CSR_READ_1(sc, reg) | (x)) 213 214 #define VR_CLRBIT(sc, reg, x) \ 215 CSR_WRITE_1(sc, reg, \ 216 CSR_READ_1(sc, reg) & ~(x)) 217 218 #define VR_SETBIT16(sc, reg, x) \ 219 CSR_WRITE_2(sc, reg, \ 220 CSR_READ_2(sc, reg) | (x)) 221 222 #define VR_CLRBIT16(sc, reg, x) \ 223 CSR_WRITE_2(sc, reg, \ 224 CSR_READ_2(sc, reg) & ~(x)) 225 226 #define VR_SETBIT32(sc, reg, x) \ 227 CSR_WRITE_4(sc, reg, \ 228 CSR_READ_4(sc, reg) | (x)) 229 230 #define VR_CLRBIT32(sc, reg, x) \ 231 CSR_WRITE_4(sc, reg, \ 232 CSR_READ_4(sc, reg) & ~(x)) 233 234 #define SIO_SET(x) \ 235 CSR_WRITE_1(sc, VR_MIICMD, \ 236 CSR_READ_1(sc, VR_MIICMD) | (x)) 237 238 #define SIO_CLR(x) \ 239 CSR_WRITE_1(sc, VR_MIICMD, \ 240 CSR_READ_1(sc, VR_MIICMD) & ~(x)) 241 242 #ifdef VR_USESWSHIFT 243 /* 244 * Sync the PHYs by setting data bit and strobing the clock 32 times. 245 */ 246 static void 247 vr_mii_sync(struct vr_softc *sc) 248 { 249 int i; 250 251 SIO_SET(VR_MIICMD_DIR|VR_MIICMD_DATAIN); 252 253 for (i = 0; i < 32; i++) { 254 SIO_SET(VR_MIICMD_CLK); 255 DELAY(1); 256 SIO_CLR(VR_MIICMD_CLK); 257 DELAY(1); 258 } 259 } 260 261 /* 262 * Clock a series of bits through the MII. 263 */ 264 static void 265 vr_mii_send(struct vr_softc *sc, uint32_t bits, int cnt) 266 { 267 int i; 268 269 SIO_CLR(VR_MIICMD_CLK); 270 271 for (i = (0x1 << (cnt - 1)); i; i >>= 1) { 272 if (bits & i) 273 SIO_SET(VR_MIICMD_DATAIN); 274 else 275 SIO_CLR(VR_MIICMD_DATAIN); 276 DELAY(1); 277 SIO_CLR(VR_MIICMD_CLK); 278 DELAY(1); 279 SIO_SET(VR_MIICMD_CLK); 280 } 281 } 282 #endif 283 284 /* 285 * Read an PHY register through the MII. 286 */ 287 static int 288 vr_mii_readreg(struct vr_softc *sc, struct vr_mii_frame *frame) 289 #ifdef VR_USESWSHIFT 290 { 291 int i, ack; 292 293 /* Set up frame for RX. */ 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 /* Turn on data xmit. */ 303 SIO_SET(VR_MIICMD_DIR); 304 305 vr_mii_sync(sc); 306 307 /* Send command/address info. */ 308 vr_mii_send(sc, frame->mii_stdelim, 2); 309 vr_mii_send(sc, frame->mii_opcode, 2); 310 vr_mii_send(sc, frame->mii_phyaddr, 5); 311 vr_mii_send(sc, frame->mii_regaddr, 5); 312 313 /* Idle bit. */ 314 SIO_CLR((VR_MIICMD_CLK|VR_MIICMD_DATAIN)); 315 DELAY(1); 316 SIO_SET(VR_MIICMD_CLK); 317 DELAY(1); 318 319 /* Turn off xmit. */ 320 SIO_CLR(VR_MIICMD_DIR); 321 322 /* Check for ack */ 323 SIO_CLR(VR_MIICMD_CLK); 324 DELAY(1); 325 ack = CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT; 326 SIO_SET(VR_MIICMD_CLK); 327 DELAY(1); 328 329 /* 330 * Now try reading data bits. If the ack failed, we still 331 * need to clock through 16 cycles to keep the PHY(s) in sync. 332 */ 333 if (ack) { 334 for(i = 0; i < 16; i++) { 335 SIO_CLR(VR_MIICMD_CLK); 336 DELAY(1); 337 SIO_SET(VR_MIICMD_CLK); 338 DELAY(1); 339 } 340 goto fail; 341 } 342 343 for (i = 0x8000; i; i >>= 1) { 344 SIO_CLR(VR_MIICMD_CLK); 345 DELAY(1); 346 if (!ack) { 347 if (CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT) 348 frame->mii_data |= i; 349 DELAY(1); 350 } 351 SIO_SET(VR_MIICMD_CLK); 352 DELAY(1); 353 } 354 355 fail: 356 SIO_CLR(VR_MIICMD_CLK); 357 DELAY(1); 358 SIO_SET(VR_MIICMD_CLK); 359 DELAY(1); 360 361 if (ack) 362 return(1); 363 return(0); 364 } 365 #else 366 { 367 int i; 368 369 /* Set the PHY address. */ 370 CSR_WRITE_1(sc, VR_PHYADDR, (CSR_READ_1(sc, VR_PHYADDR)& 0xe0)| 371 frame->mii_phyaddr); 372 373 /* Set the register address. */ 374 CSR_WRITE_1(sc, VR_MIIADDR, frame->mii_regaddr); 375 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_READ_ENB); 376 377 for (i = 0; i < 10000; i++) { 378 if ((CSR_READ_1(sc, VR_MIICMD) & VR_MIICMD_READ_ENB) == 0) 379 break; 380 DELAY(1); 381 } 382 frame->mii_data = CSR_READ_2(sc, VR_MIIDATA); 383 384 return(0); 385 } 386 #endif 387 388 389 /* 390 * Write to a PHY register through the MII. 391 */ 392 static int 393 vr_mii_writereg(struct vr_softc *sc, struct vr_mii_frame *frame) 394 #ifdef VR_USESWSHIFT 395 { 396 CSR_WRITE_1(sc, VR_MIICMD, 0); 397 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM); 398 399 /* Set up frame for TX. */ 400 frame->mii_stdelim = VR_MII_STARTDELIM; 401 frame->mii_opcode = VR_MII_WRITEOP; 402 frame->mii_turnaround = VR_MII_TURNAROUND; 403 404 /* Turn on data output. */ 405 SIO_SET(VR_MIICMD_DIR); 406 407 vr_mii_sync(sc); 408 409 vr_mii_send(sc, frame->mii_stdelim, 2); 410 vr_mii_send(sc, frame->mii_opcode, 2); 411 vr_mii_send(sc, frame->mii_phyaddr, 5); 412 vr_mii_send(sc, frame->mii_regaddr, 5); 413 vr_mii_send(sc, frame->mii_turnaround, 2); 414 vr_mii_send(sc, frame->mii_data, 16); 415 416 /* Idle bit. */ 417 SIO_SET(VR_MIICMD_CLK); 418 DELAY(1); 419 SIO_CLR(VR_MIICMD_CLK); 420 DELAY(1); 421 422 /* Turn off xmit. */ 423 SIO_CLR(VR_MIICMD_DIR); 424 425 return(0); 426 } 427 #else 428 { 429 int i; 430 431 /* Set the PHY-adress */ 432 CSR_WRITE_1(sc, VR_PHYADDR, (CSR_READ_1(sc, VR_PHYADDR)& 0xe0)| 433 frame->mii_phyaddr); 434 435 /* Set the register address and data to write. */ 436 CSR_WRITE_1(sc, VR_MIIADDR, frame->mii_regaddr); 437 CSR_WRITE_2(sc, VR_MIIDATA, frame->mii_data); 438 439 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_WRITE_ENB); 440 441 for (i = 0; i < 10000; i++) { 442 if ((CSR_READ_1(sc, VR_MIICMD) & VR_MIICMD_WRITE_ENB) == 0) 443 break; 444 DELAY(1); 445 } 446 return(0); 447 } 448 #endif 449 450 static int 451 vr_miibus_readreg(device_t dev, int phy, int reg) 452 { 453 struct vr_mii_frame frame; 454 struct vr_softc *sc; 455 456 sc = device_get_softc(dev); 457 458 switch (sc->vr_revid) { 459 case REV_ID_VT6102_APOLLO: 460 if (phy != 1) 461 return(0); 462 break; 463 default: 464 break; 465 } 466 467 bzero(&frame, sizeof(frame)); 468 469 frame.mii_phyaddr = phy; 470 frame.mii_regaddr = reg; 471 vr_mii_readreg(sc, &frame); 472 473 return(frame.mii_data); 474 } 475 476 static int 477 vr_miibus_writereg(device_t dev, int phy, int reg, int data) 478 { 479 struct vr_mii_frame frame; 480 struct vr_softc *sc; 481 482 sc = device_get_softc(dev); 483 484 switch (sc->vr_revid) { 485 case REV_ID_VT6102_APOLLO: 486 if (phy != 1) 487 return 0; 488 break; 489 default: 490 break; 491 } 492 493 bzero(&frame, sizeof(frame)); 494 495 frame.mii_phyaddr = phy; 496 frame.mii_regaddr = reg; 497 frame.mii_data = data; 498 499 vr_mii_writereg(sc, &frame); 500 501 return(0); 502 } 503 504 static void 505 vr_miibus_statchg(device_t dev) 506 { 507 struct mii_data *mii; 508 struct vr_softc *sc; 509 510 sc = device_get_softc(dev); 511 mii = device_get_softc(sc->vr_miibus); 512 vr_setcfg(sc, mii->mii_media_active); 513 } 514 515 /* 516 * Program the 64-bit multicast hash filter. 517 */ 518 static void 519 vr_setmulti(struct vr_softc *sc) 520 { 521 struct ifnet *ifp; 522 uint32_t hashes[2] = { 0, 0 }; 523 struct ifmultiaddr *ifma; 524 uint8_t rxfilt; 525 int mcnt = 0; 526 527 ifp = &sc->arpcom.ac_if; 528 529 rxfilt = CSR_READ_1(sc, VR_RXCFG); 530 531 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { 532 rxfilt |= VR_RXCFG_RX_MULTI; 533 CSR_WRITE_1(sc, VR_RXCFG, rxfilt); 534 CSR_WRITE_4(sc, VR_MAR0, 0xFFFFFFFF); 535 CSR_WRITE_4(sc, VR_MAR1, 0xFFFFFFFF); 536 return; 537 } 538 539 /* First, zero out all the existing hash bits. */ 540 CSR_WRITE_4(sc, VR_MAR0, 0); 541 CSR_WRITE_4(sc, VR_MAR1, 0); 542 543 /* Now program new ones. */ 544 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 545 int h; 546 547 if (ifma->ifma_addr->sa_family != AF_LINK) 548 continue; 549 550 /* use the lower 6 bits */ 551 h = (ether_crc32_be( 552 LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 553 ETHER_ADDR_LEN) >> 26) & 0x0000003F; 554 if (h < 32) 555 hashes[0] |= (1 << h); 556 else 557 hashes[1] |= (1 << (h - 32)); 558 mcnt++; 559 } 560 561 if (mcnt) 562 rxfilt |= VR_RXCFG_RX_MULTI; 563 else 564 rxfilt &= ~VR_RXCFG_RX_MULTI; 565 566 CSR_WRITE_4(sc, VR_MAR0, hashes[0]); 567 CSR_WRITE_4(sc, VR_MAR1, hashes[1]); 568 CSR_WRITE_1(sc, VR_RXCFG, rxfilt); 569 } 570 571 /* 572 * In order to fiddle with the 573 * 'full-duplex' and '100Mbps' bits in the netconfig register, we 574 * first have to put the transmit and/or receive logic in the idle state. 575 */ 576 static void 577 vr_setcfg(struct vr_softc *sc, int media) 578 { 579 int restart = 0; 580 581 if (CSR_READ_2(sc, VR_COMMAND) & (VR_CMD_TX_ON|VR_CMD_RX_ON)) { 582 restart = 1; 583 VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_TX_ON|VR_CMD_RX_ON)); 584 } 585 586 if ((media & IFM_GMASK) == IFM_FDX) 587 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX); 588 else 589 VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX); 590 591 if (restart) 592 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON|VR_CMD_RX_ON); 593 } 594 595 static void 596 vr_reset(struct vr_softc *sc) 597 { 598 int i; 599 600 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RESET); 601 602 for (i = 0; i < VR_TIMEOUT; i++) { 603 DELAY(10); 604 if (!(CSR_READ_2(sc, VR_COMMAND) & VR_CMD_RESET)) 605 break; 606 } 607 if (i == VR_TIMEOUT) { 608 struct ifnet *ifp = &sc->arpcom.ac_if; 609 610 if (sc->vr_revid < REV_ID_VT3065_A) { 611 if_printf(ifp, "reset never completed!\n"); 612 } else { 613 /* Use newer force reset command */ 614 if_printf(ifp, "Using force reset command.\n"); 615 VR_SETBIT(sc, VR_MISC_CR1, VR_MISCCR1_FORSRST); 616 } 617 } 618 619 /* Wait a little while for the chip to get its brains in order. */ 620 DELAY(1000); 621 } 622 623 /* 624 * Probe for a VIA Rhine chip. Check the PCI vendor and device 625 * IDs against our list and return a device name if we find a match. 626 */ 627 static int 628 vr_probe(device_t dev) 629 { 630 struct vr_type *t; 631 uint16_t vid, did; 632 633 vid = pci_get_vendor(dev); 634 did = pci_get_device(dev); 635 636 for (t = vr_devs; t->vr_name != NULL; ++t) { 637 if (vid == t->vr_vid && did == t->vr_did) { 638 device_set_desc(dev, t->vr_name); 639 return(0); 640 } 641 } 642 643 return(ENXIO); 644 } 645 646 /* 647 * Attach the interface. Allocate softc structures, do ifmedia 648 * setup and ethernet/BPF attach. 649 */ 650 static int 651 vr_attach(device_t dev) 652 { 653 int i; 654 uint8_t eaddr[ETHER_ADDR_LEN]; 655 struct vr_softc *sc; 656 struct ifnet *ifp; 657 int error = 0, rid; 658 659 sc = device_get_softc(dev); 660 callout_init(&sc->vr_stat_timer); 661 662 /* 663 * Handle power management nonsense. 664 */ 665 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 666 uint32_t iobase, membase, irq; 667 668 /* Save important PCI config data. */ 669 iobase = pci_read_config(dev, VR_PCI_LOIO, 4); 670 membase = pci_read_config(dev, VR_PCI_LOMEM, 4); 671 irq = pci_read_config(dev, VR_PCI_INTLINE, 4); 672 673 /* Reset the power state. */ 674 device_printf(dev, "chip is in D%d power mode " 675 "-- setting to D0\n", pci_get_powerstate(dev)); 676 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 677 678 /* Restore PCI config data. */ 679 pci_write_config(dev, VR_PCI_LOIO, iobase, 4); 680 pci_write_config(dev, VR_PCI_LOMEM, membase, 4); 681 pci_write_config(dev, VR_PCI_INTLINE, irq, 4); 682 } 683 684 pci_enable_busmaster(dev); 685 686 sc->vr_revid = pci_get_revid(dev); 687 688 rid = VR_RID; 689 sc->vr_res = bus_alloc_resource_any(dev, VR_RES, &rid, RF_ACTIVE); 690 691 if (sc->vr_res == NULL) { 692 device_printf(dev, "couldn't map ports/memory\n"); 693 return ENXIO; 694 } 695 696 sc->vr_btag = rman_get_bustag(sc->vr_res); 697 sc->vr_bhandle = rman_get_bushandle(sc->vr_res); 698 699 /* Allocate interrupt */ 700 rid = 0; 701 sc->vr_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 702 RF_SHAREABLE | RF_ACTIVE); 703 704 if (sc->vr_irq == NULL) { 705 device_printf(dev, "couldn't map interrupt\n"); 706 error = ENXIO; 707 goto fail; 708 } 709 710 /* 711 * Windows may put the chip in suspend mode when it 712 * shuts down. Be sure to kick it in the head to wake it 713 * up again. 714 */ 715 VR_CLRBIT(sc, VR_STICKHW, (VR_STICKHW_DS0|VR_STICKHW_DS1)); 716 717 ifp = &sc->arpcom.ac_if; 718 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 719 720 /* Reset the adapter. */ 721 vr_reset(sc); 722 723 /* 724 * Turn on bit2 (MIION) in PCI configuration register 0x53 during 725 * initialization and disable AUTOPOLL. 726 */ 727 pci_write_config(dev, VR_PCI_MODE, 728 pci_read_config(dev, VR_PCI_MODE, 4) | (VR_MODE3_MIION << 24), 4); 729 VR_CLRBIT(sc, VR_MIICMD, VR_MIICMD_AUTOPOLL); 730 731 /* 732 * Get station address. The way the Rhine chips work, 733 * you're not allowed to directly access the EEPROM once 734 * they've been programmed a special way. Consequently, 735 * we need to read the node address from the PAR0 and PAR1 736 * registers. 737 */ 738 VR_SETBIT(sc, VR_EECSR, VR_EECSR_LOAD); 739 DELAY(200); 740 for (i = 0; i < ETHER_ADDR_LEN; i++) 741 eaddr[i] = CSR_READ_1(sc, VR_PAR0 + i); 742 743 sc->vr_ldata = contigmalloc(sizeof(struct vr_list_data), M_DEVBUF, 744 M_WAITOK | M_ZERO, 0, 0xffffffff, PAGE_SIZE, 0); 745 746 if (sc->vr_ldata == NULL) { 747 device_printf(dev, "no memory for list buffers!\n"); 748 error = ENXIO; 749 goto fail; 750 } 751 752 /* Initialize TX buffer */ 753 sc->vr_cdata.vr_tx_buf = contigmalloc(VR_TX_BUF_SIZE, M_DEVBUF, 754 M_WAITOK, 0, 0xffffffff, PAGE_SIZE, 0); 755 if (sc->vr_cdata.vr_tx_buf == NULL) { 756 device_printf(dev, "can't allocate tx buffer!\n"); 757 error = ENXIO; 758 goto fail; 759 } 760 761 /* Set various TX indexes to invalid value */ 762 sc->vr_cdata.vr_tx_free_idx = -1; 763 sc->vr_cdata.vr_tx_tail_idx = -1; 764 sc->vr_cdata.vr_tx_head_idx = -1; 765 766 767 ifp->if_softc = sc; 768 ifp->if_mtu = ETHERMTU; 769 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 770 ifp->if_ioctl = vr_ioctl; 771 ifp->if_start = vr_start; 772 #ifdef DEVICE_POLLING 773 ifp->if_poll = vr_poll; 774 #endif 775 ifp->if_watchdog = vr_watchdog; 776 ifp->if_init = vr_init; 777 ifp->if_baudrate = 10000000; 778 ifq_set_maxlen(&ifp->if_snd, VR_TX_LIST_CNT - 1); 779 ifq_set_ready(&ifp->if_snd); 780 781 /* 782 * Do MII setup. 783 */ 784 if (mii_phy_probe(dev, &sc->vr_miibus, 785 vr_ifmedia_upd, vr_ifmedia_sts)) { 786 if_printf(ifp, "MII without any phy!\n"); 787 error = ENXIO; 788 goto fail; 789 } 790 791 /* Call MI attach routine. */ 792 ether_ifattach(ifp, eaddr, NULL); 793 794 error = bus_setup_intr(dev, sc->vr_irq, INTR_NETSAFE, 795 vr_intr, sc, &sc->vr_intrhand, 796 ifp->if_serializer); 797 798 if (error) { 799 device_printf(dev, "couldn't set up irq\n"); 800 ether_ifdetach(ifp); 801 goto fail; 802 } 803 return 0; 804 805 fail: 806 vr_detach(dev); 807 return(error); 808 } 809 810 static int 811 vr_detach(device_t dev) 812 { 813 struct vr_softc *sc = device_get_softc(dev); 814 struct ifnet *ifp = &sc->arpcom.ac_if; 815 816 if (device_is_attached(dev)) { 817 lwkt_serialize_enter(ifp->if_serializer); 818 vr_stop(sc); 819 bus_teardown_intr(dev, sc->vr_irq, sc->vr_intrhand); 820 lwkt_serialize_exit(ifp->if_serializer); 821 822 ether_ifdetach(ifp); 823 } 824 if (sc->vr_miibus != NULL) 825 device_delete_child(dev, sc->vr_miibus); 826 bus_generic_detach(dev); 827 828 if (sc->vr_irq != NULL) 829 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->vr_irq); 830 if (sc->vr_res != NULL) 831 bus_release_resource(dev, VR_RES, VR_RID, sc->vr_res); 832 if (sc->vr_ldata != NULL) 833 contigfree(sc->vr_ldata, sizeof(struct vr_list_data), M_DEVBUF); 834 if (sc->vr_cdata.vr_tx_buf != NULL) 835 contigfree(sc->vr_cdata.vr_tx_buf, VR_TX_BUF_SIZE, M_DEVBUF); 836 837 return(0); 838 } 839 840 /* 841 * Initialize the transmit descriptors. 842 */ 843 static int 844 vr_list_tx_init(struct vr_softc *sc) 845 { 846 struct vr_chain_data *cd; 847 struct vr_list_data *ld; 848 struct vr_chain *tx_chain; 849 int i; 850 851 cd = &sc->vr_cdata; 852 ld = sc->vr_ldata; 853 tx_chain = cd->vr_tx_chain; 854 855 for (i = 0; i < VR_TX_LIST_CNT; i++) { 856 tx_chain[i].vr_ptr = &ld->vr_tx_list[i]; 857 if (i == (VR_TX_LIST_CNT - 1)) 858 tx_chain[i].vr_next_idx = 0; 859 else 860 tx_chain[i].vr_next_idx = i + 1; 861 } 862 863 for (i = 0; i < VR_TX_LIST_CNT; ++i) { 864 void *tx_buf; 865 int next_idx; 866 867 tx_buf = VR_TX_BUF(sc, i); 868 next_idx = tx_chain[i].vr_next_idx; 869 870 tx_chain[i].vr_next_desc_paddr = 871 vtophys(tx_chain[next_idx].vr_ptr); 872 tx_chain[i].vr_buf_paddr = vtophys(tx_buf); 873 } 874 875 cd->vr_tx_free_idx = 0; 876 cd->vr_tx_tail_idx = cd->vr_tx_head_idx = -1; 877 878 return 0; 879 } 880 881 882 /* 883 * Initialize the RX descriptors and allocate mbufs for them. Note that 884 * we arrange the descriptors in a closed ring, so that the last descriptor 885 * points back to the first. 886 */ 887 static int 888 vr_list_rx_init(struct vr_softc *sc) 889 { 890 struct vr_chain_data *cd; 891 struct vr_list_data *ld; 892 int i, nexti; 893 894 cd = &sc->vr_cdata; 895 ld = sc->vr_ldata; 896 897 for (i = 0; i < VR_RX_LIST_CNT; i++) { 898 cd->vr_rx_chain[i].vr_ptr = (struct vr_desc *)&ld->vr_rx_list[i]; 899 if (vr_newbuf(sc, &cd->vr_rx_chain[i], NULL) == ENOBUFS) 900 return(ENOBUFS); 901 if (i == (VR_RX_LIST_CNT - 1)) 902 nexti = 0; 903 else 904 nexti = i + 1; 905 cd->vr_rx_chain[i].vr_nextdesc = &cd->vr_rx_chain[nexti]; 906 ld->vr_rx_list[i].vr_next = vtophys(&ld->vr_rx_list[nexti]); 907 } 908 909 cd->vr_rx_head = &cd->vr_rx_chain[0]; 910 911 return(0); 912 } 913 914 /* 915 * Initialize an RX descriptor and attach an MBUF cluster. 916 * Note: the length fields are only 11 bits wide, which means the 917 * largest size we can specify is 2047. This is important because 918 * MCLBYTES is 2048, so we have to subtract one otherwise we'll 919 * overflow the field and make a mess. 920 */ 921 static int 922 vr_newbuf(struct vr_softc *sc, struct vr_chain_onefrag *c, struct mbuf *m) 923 { 924 struct mbuf *m_new = NULL; 925 926 if (m == NULL) { 927 m_new = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR); 928 if (m_new == NULL) 929 return (ENOBUFS); 930 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 931 } else { 932 m_new = m; 933 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 934 m_new->m_data = m_new->m_ext.ext_buf; 935 } 936 937 m_adj(m_new, sizeof(uint64_t)); 938 939 c->vr_mbuf = m_new; 940 c->vr_ptr->vr_status = VR_RXSTAT; 941 c->vr_ptr->vr_data = vtophys(mtod(m_new, caddr_t)); 942 c->vr_ptr->vr_ctl = VR_RXCTL | VR_RXLEN; 943 944 return(0); 945 } 946 947 /* 948 * A frame has been uploaded: pass the resulting mbuf chain up to 949 * the higher level protocols. 950 */ 951 static void 952 vr_rxeof(struct vr_softc *sc) 953 { 954 struct mbuf *m; 955 struct ifnet *ifp; 956 struct vr_chain_onefrag *cur_rx; 957 int total_len = 0; 958 uint32_t rxstat; 959 960 ifp = &sc->arpcom.ac_if; 961 962 while(!((rxstat = sc->vr_cdata.vr_rx_head->vr_ptr->vr_status) & 963 VR_RXSTAT_OWN)) { 964 struct mbuf *m0 = NULL; 965 966 cur_rx = sc->vr_cdata.vr_rx_head; 967 sc->vr_cdata.vr_rx_head = cur_rx->vr_nextdesc; 968 m = cur_rx->vr_mbuf; 969 970 /* 971 * If an error occurs, update stats, clear the 972 * status word and leave the mbuf cluster in place: 973 * it should simply get re-used next time this descriptor 974 * comes up in the ring. 975 */ 976 if (rxstat & VR_RXSTAT_RXERR) { 977 ifp->if_ierrors++; 978 if_printf(ifp, "rx error (%02x):", rxstat & 0x000000ff); 979 if (rxstat & VR_RXSTAT_CRCERR) 980 printf(" crc error"); 981 if (rxstat & VR_RXSTAT_FRAMEALIGNERR) 982 printf(" frame alignment error\n"); 983 if (rxstat & VR_RXSTAT_FIFOOFLOW) 984 printf(" FIFO overflow"); 985 if (rxstat & VR_RXSTAT_GIANT) 986 printf(" received giant packet"); 987 if (rxstat & VR_RXSTAT_RUNT) 988 printf(" received runt packet"); 989 if (rxstat & VR_RXSTAT_BUSERR) 990 printf(" system bus error"); 991 if (rxstat & VR_RXSTAT_BUFFERR) 992 printf("rx buffer error"); 993 printf("\n"); 994 vr_newbuf(sc, cur_rx, m); 995 continue; 996 } 997 998 /* No errors; receive the packet. */ 999 total_len = VR_RXBYTES(cur_rx->vr_ptr->vr_status); 1000 1001 /* 1002 * XXX The VIA Rhine chip includes the CRC with every 1003 * received frame, and there's no way to turn this 1004 * behavior off (at least, I can't find anything in 1005 * the manual that explains how to do it) so we have 1006 * to trim off the CRC manually. 1007 */ 1008 total_len -= ETHER_CRC_LEN; 1009 1010 m0 = m_devget(mtod(m, char *) - ETHER_ALIGN, 1011 total_len + ETHER_ALIGN, 0, ifp, NULL); 1012 vr_newbuf(sc, cur_rx, m); 1013 if (m0 == NULL) { 1014 ifp->if_ierrors++; 1015 continue; 1016 } 1017 m_adj(m0, ETHER_ALIGN); 1018 m = m0; 1019 1020 ifp->if_ipackets++; 1021 ifp->if_input(ifp, m); 1022 } 1023 } 1024 1025 static void 1026 vr_rxeoc(struct vr_softc *sc) 1027 { 1028 struct ifnet *ifp; 1029 int i; 1030 1031 ifp = &sc->arpcom.ac_if; 1032 1033 ifp->if_ierrors++; 1034 1035 VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_RX_ON); 1036 DELAY(10000); 1037 1038 /* Wait for receiver to stop */ 1039 for (i = 0x400; 1040 i && (CSR_READ_2(sc, VR_COMMAND) & VR_CMD_RX_ON); 1041 i--) 1042 ; /* Wait for receiver to stop */ 1043 1044 if (i == 0) { 1045 if_printf(ifp, "rx shutdown error!\n"); 1046 sc->vr_flags |= VR_F_RESTART; 1047 return; 1048 } 1049 1050 vr_rxeof(sc); 1051 1052 CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr)); 1053 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_ON); 1054 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_GO); 1055 } 1056 1057 /* 1058 * A frame was downloaded to the chip. It's safe for us to clean up 1059 * the list buffers. 1060 */ 1061 static void 1062 vr_txeof(struct vr_softc *sc) 1063 { 1064 struct vr_chain_data *cd; 1065 struct vr_chain *tx_chain; 1066 struct ifnet *ifp; 1067 1068 ifp = &sc->arpcom.ac_if; 1069 cd = &sc->vr_cdata; 1070 1071 /* Reset the timeout timer; if_txeoc will clear it. */ 1072 ifp->if_timer = 5; 1073 1074 /* Sanity check. */ 1075 if (cd->vr_tx_head_idx == -1) 1076 return; 1077 1078 tx_chain = cd->vr_tx_chain; 1079 1080 /* 1081 * Go through our tx list and free mbufs for those 1082 * frames that have been transmitted. 1083 */ 1084 while(tx_chain[cd->vr_tx_head_idx].vr_buf != NULL) { 1085 struct vr_chain *cur_tx; 1086 uint32_t txstat; 1087 int i; 1088 1089 cur_tx = &tx_chain[cd->vr_tx_head_idx]; 1090 txstat = cur_tx->vr_ptr->vr_status; 1091 1092 if ((txstat & VR_TXSTAT_ABRT) || 1093 (txstat & VR_TXSTAT_UDF)) { 1094 for (i = 0x400; 1095 i && (CSR_READ_2(sc, VR_COMMAND) & VR_CMD_TX_ON); 1096 i--) 1097 ; /* Wait for chip to shutdown */ 1098 if (i == 0) { 1099 if_printf(ifp, "tx shutdown timeout\n"); 1100 sc->vr_flags |= VR_F_RESTART; 1101 break; 1102 } 1103 VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; 1104 CSR_WRITE_4(sc, VR_TXADDR, vtophys(cur_tx->vr_ptr)); 1105 break; 1106 } 1107 1108 if (txstat & VR_TXSTAT_OWN) 1109 break; 1110 1111 if (txstat & VR_TXSTAT_ERRSUM) { 1112 ifp->if_oerrors++; 1113 if (txstat & VR_TXSTAT_DEFER) 1114 ifp->if_collisions++; 1115 if (txstat & VR_TXSTAT_LATECOLL) 1116 ifp->if_collisions++; 1117 } 1118 1119 ifp->if_collisions += (txstat & VR_TXSTAT_COLLCNT) >> 3; 1120 1121 ifp->if_opackets++; 1122 cur_tx->vr_buf = NULL; 1123 1124 if (cd->vr_tx_head_idx == cd->vr_tx_tail_idx) { 1125 cd->vr_tx_head_idx = -1; 1126 cd->vr_tx_tail_idx = -1; 1127 break; 1128 } 1129 1130 cd->vr_tx_head_idx = cur_tx->vr_next_idx; 1131 } 1132 } 1133 1134 /* 1135 * TX 'end of channel' interrupt handler. 1136 */ 1137 static void 1138 vr_txeoc(struct vr_softc *sc) 1139 { 1140 struct ifnet *ifp; 1141 1142 ifp = &sc->arpcom.ac_if; 1143 1144 if (sc->vr_cdata.vr_tx_head_idx == -1) { 1145 ifp->if_flags &= ~IFF_OACTIVE; 1146 sc->vr_cdata.vr_tx_tail_idx = -1; 1147 ifp->if_timer = 0; 1148 } 1149 } 1150 1151 static void 1152 vr_tick(void *xsc) 1153 { 1154 struct vr_softc *sc = xsc; 1155 struct ifnet *ifp = &sc->arpcom.ac_if; 1156 struct mii_data *mii; 1157 1158 lwkt_serialize_enter(ifp->if_serializer); 1159 1160 if (sc->vr_flags & VR_F_RESTART) { 1161 if_printf(&sc->arpcom.ac_if, "restarting\n"); 1162 vr_stop(sc); 1163 vr_reset(sc); 1164 vr_init(sc); 1165 sc->vr_flags &= ~VR_F_RESTART; 1166 } 1167 1168 mii = device_get_softc(sc->vr_miibus); 1169 mii_tick(mii); 1170 1171 callout_reset(&sc->vr_stat_timer, hz, vr_tick, sc); 1172 1173 lwkt_serialize_exit(ifp->if_serializer); 1174 } 1175 1176 static void 1177 vr_intr(void *arg) 1178 { 1179 struct vr_softc *sc; 1180 struct ifnet *ifp; 1181 uint16_t status; 1182 1183 sc = arg; 1184 ifp = &sc->arpcom.ac_if; 1185 1186 /* Supress unwanted interrupts. */ 1187 if (!(ifp->if_flags & IFF_UP)) { 1188 vr_stop(sc); 1189 return; 1190 } 1191 1192 /* Disable interrupts. */ 1193 if ((ifp->if_flags & IFF_POLLING) == 0) 1194 CSR_WRITE_2(sc, VR_IMR, 0x0000); 1195 1196 for (;;) { 1197 status = CSR_READ_2(sc, VR_ISR); 1198 if (status) 1199 CSR_WRITE_2(sc, VR_ISR, status); 1200 1201 if ((status & VR_INTRS) == 0) 1202 break; 1203 1204 if (status & VR_ISR_RX_OK) 1205 vr_rxeof(sc); 1206 1207 if (status & VR_ISR_RX_DROPPED) { 1208 if_printf(ifp, "rx packet lost\n"); 1209 ifp->if_ierrors++; 1210 } 1211 1212 if ((status & VR_ISR_RX_ERR) || (status & VR_ISR_RX_NOBUF) || 1213 (status & VR_ISR_RX_NOBUF) || (status & VR_ISR_RX_OFLOW)) { 1214 if_printf(ifp, "receive error (%04x)", status); 1215 if (status & VR_ISR_RX_NOBUF) 1216 printf(" no buffers"); 1217 if (status & VR_ISR_RX_OFLOW) 1218 printf(" overflow"); 1219 if (status & VR_ISR_RX_DROPPED) 1220 printf(" packet lost"); 1221 printf("\n"); 1222 vr_rxeoc(sc); 1223 } 1224 1225 if ((status & VR_ISR_BUSERR) || (status & VR_ISR_TX_UNDERRUN)) { 1226 vr_reset(sc); 1227 vr_init(sc); 1228 break; 1229 } 1230 1231 if ((status & VR_ISR_TX_OK) || (status & VR_ISR_TX_ABRT) || 1232 (status & VR_ISR_TX_ABRT2) || (status & VR_ISR_UDFI)) { 1233 vr_txeof(sc); 1234 if ((status & VR_ISR_UDFI) || 1235 (status & VR_ISR_TX_ABRT2) || 1236 (status & VR_ISR_TX_ABRT)) { 1237 ifp->if_oerrors++; 1238 if (sc->vr_cdata.vr_tx_head_idx != -1) { 1239 VR_SETBIT16(sc, VR_COMMAND, 1240 VR_CMD_TX_ON); 1241 VR_SETBIT16(sc, VR_COMMAND, 1242 VR_CMD_TX_GO); 1243 } 1244 } else { 1245 vr_txeoc(sc); 1246 } 1247 } 1248 1249 } 1250 1251 /* Re-enable interrupts. */ 1252 if ((ifp->if_flags & IFF_POLLING) == 0) 1253 CSR_WRITE_2(sc, VR_IMR, VR_INTRS); 1254 1255 if (!ifq_is_empty(&ifp->if_snd)) 1256 vr_start(ifp); 1257 } 1258 1259 /* 1260 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 1261 * pointers to the fragment pointers. 1262 */ 1263 static int 1264 vr_encap(struct vr_softc *sc, int chain_idx, struct mbuf *m_head) 1265 { 1266 struct vr_chain *c; 1267 struct vr_desc *f; 1268 caddr_t tx_buf; 1269 int len; 1270 1271 KASSERT(chain_idx >= 0 && chain_idx < VR_TX_LIST_CNT, 1272 ("%s: chain idx(%d) out of range 0-%d", 1273 sc->arpcom.ac_if.if_xname, chain_idx, VR_TX_LIST_CNT)); 1274 1275 /* 1276 * The VIA Rhine wants packet buffers to be longword 1277 * aligned, but very often our mbufs aren't. Rather than 1278 * waste time trying to decide when to copy and when not 1279 * to copy, just do it all the time. 1280 */ 1281 tx_buf = VR_TX_BUF(sc, chain_idx); 1282 m_copydata(m_head, 0, m_head->m_pkthdr.len, tx_buf); 1283 len = m_head->m_pkthdr.len; 1284 1285 /* 1286 * The Rhine chip doesn't auto-pad, so we have to make 1287 * sure to pad short frames out to the minimum frame length 1288 * ourselves. 1289 */ 1290 if (len < VR_MIN_FRAMELEN) { 1291 bzero(tx_buf + len, VR_MIN_FRAMELEN - len); 1292 len = VR_MIN_FRAMELEN; 1293 } 1294 1295 c = &sc->vr_cdata.vr_tx_chain[chain_idx]; 1296 c->vr_buf = tx_buf; 1297 1298 f = c->vr_ptr; 1299 f->vr_data = c->vr_buf_paddr; 1300 f->vr_ctl = len; 1301 f->vr_ctl |= (VR_TXCTL_TLINK | VR_TXCTL_FIRSTFRAG); 1302 f->vr_ctl |= (VR_TXCTL_LASTFRAG | VR_TXCTL_FINT); 1303 f->vr_status = 0; 1304 f->vr_next = c->vr_next_desc_paddr; 1305 1306 return(0); 1307 } 1308 1309 /* 1310 * Main transmit routine. To avoid having to do mbuf copies, we put pointers 1311 * to the mbuf data regions directly in the transmit lists. We also save a 1312 * copy of the pointers since the transmit list fragment pointers are 1313 * physical addresses. 1314 */ 1315 static void 1316 vr_start(struct ifnet *ifp) 1317 { 1318 struct vr_softc *sc; 1319 struct vr_chain_data *cd; 1320 struct vr_chain *tx_chain; 1321 int cur_tx_idx, start_tx_idx, prev_tx_idx; 1322 1323 if (ifp->if_flags & IFF_OACTIVE) 1324 return; 1325 1326 sc = ifp->if_softc; 1327 cd = &sc->vr_cdata; 1328 tx_chain = cd->vr_tx_chain; 1329 1330 start_tx_idx = cd->vr_tx_free_idx; 1331 cur_tx_idx = prev_tx_idx = -1; 1332 1333 /* Check for an available queue slot. If there are none, punt. */ 1334 if (tx_chain[start_tx_idx].vr_buf != NULL) { 1335 ifp->if_flags |= IFF_OACTIVE; 1336 return; 1337 } 1338 1339 while(tx_chain[cd->vr_tx_free_idx].vr_buf == NULL) { 1340 struct mbuf *m_head; 1341 struct vr_chain *cur_tx; 1342 1343 m_head = ifq_poll(&ifp->if_snd); 1344 if (m_head == NULL) 1345 break; 1346 1347 /* Pick a descriptor off the free list. */ 1348 cur_tx_idx = cd->vr_tx_free_idx; 1349 cur_tx = &tx_chain[cur_tx_idx]; 1350 1351 /* Pack the data into the descriptor. */ 1352 if (vr_encap(sc, cur_tx_idx, m_head)) { 1353 ifp->if_flags |= IFF_OACTIVE; 1354 cur_tx_idx = prev_tx_idx; 1355 break; 1356 } 1357 1358 ifq_dequeue(&ifp->if_snd, m_head); 1359 1360 /* XXX */ 1361 if (cur_tx_idx != start_tx_idx) 1362 VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; 1363 1364 BPF_MTAP(ifp, m_head); 1365 m_freem(m_head); 1366 1367 VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; 1368 VR_SETBIT16(sc, VR_COMMAND, /*VR_CMD_TX_ON|*/VR_CMD_TX_GO); 1369 1370 /* Iff everything went OK, we bump up free index. */ 1371 prev_tx_idx = cur_tx_idx; 1372 cd->vr_tx_free_idx = cur_tx->vr_next_idx; 1373 } 1374 1375 /* If there are no frames queued, bail. */ 1376 if (cur_tx_idx == -1) 1377 return; 1378 1379 sc->vr_cdata.vr_tx_tail_idx = cur_tx_idx; 1380 1381 if (sc->vr_cdata.vr_tx_head_idx == -1) 1382 sc->vr_cdata.vr_tx_head_idx = start_tx_idx; 1383 1384 /* 1385 * Set a timeout in case the chip goes out to lunch. 1386 */ 1387 ifp->if_timer = 5; 1388 } 1389 1390 static void 1391 vr_init(void *xsc) 1392 { 1393 struct vr_softc *sc = xsc; 1394 struct ifnet *ifp = &sc->arpcom.ac_if; 1395 struct mii_data *mii; 1396 int i; 1397 1398 mii = device_get_softc(sc->vr_miibus); 1399 1400 /* Cancel pending I/O and free all RX/TX buffers. */ 1401 vr_stop(sc); 1402 vr_reset(sc); 1403 1404 /* Set our station address. */ 1405 for (i = 0; i < ETHER_ADDR_LEN; i++) 1406 CSR_WRITE_1(sc, VR_PAR0 + i, sc->arpcom.ac_enaddr[i]); 1407 1408 /* Set DMA size. */ 1409 VR_CLRBIT(sc, VR_BCR0, VR_BCR0_DMA_LENGTH); 1410 VR_SETBIT(sc, VR_BCR0, VR_BCR0_DMA_STORENFWD); 1411 1412 /* 1413 * BCR0 and BCR1 can override the RXCFG and TXCFG registers, 1414 * so we must set both. 1415 */ 1416 VR_CLRBIT(sc, VR_BCR0, VR_BCR0_RX_THRESH); 1417 VR_SETBIT(sc, VR_BCR0, VR_BCR0_RXTHRESH128BYTES); 1418 1419 VR_CLRBIT(sc, VR_BCR1, VR_BCR1_TX_THRESH); 1420 VR_SETBIT(sc, VR_BCR1, VR_BCR1_TXTHRESHSTORENFWD); 1421 1422 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_THRESH); 1423 VR_SETBIT(sc, VR_RXCFG, VR_RXTHRESH_128BYTES); 1424 1425 VR_CLRBIT(sc, VR_TXCFG, VR_TXCFG_TX_THRESH); 1426 VR_SETBIT(sc, VR_TXCFG, VR_TXTHRESH_STORENFWD); 1427 1428 /* Init circular RX list. */ 1429 if (vr_list_rx_init(sc) == ENOBUFS) { 1430 vr_stop(sc); 1431 if_printf(ifp, "initialization failed: no memory for rx buffers\n"); 1432 return; 1433 } 1434 1435 /* Init tx descriptors. */ 1436 vr_list_tx_init(sc); 1437 1438 /* If we want promiscuous mode, set the allframes bit. */ 1439 if (ifp->if_flags & IFF_PROMISC) 1440 VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC); 1441 else 1442 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC); 1443 1444 /* Set capture broadcast bit to capture broadcast frames. */ 1445 if (ifp->if_flags & IFF_BROADCAST) 1446 VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD); 1447 else 1448 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD); 1449 1450 /* 1451 * Program the multicast filter, if necessary. 1452 */ 1453 vr_setmulti(sc); 1454 1455 /* 1456 * Load the address of the RX list. 1457 */ 1458 CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr)); 1459 1460 /* Enable receiver and transmitter. */ 1461 CSR_WRITE_2(sc, VR_COMMAND, VR_CMD_TX_NOPOLL|VR_CMD_START| 1462 VR_CMD_TX_ON|VR_CMD_RX_ON| 1463 VR_CMD_RX_GO); 1464 1465 CSR_WRITE_4(sc, VR_TXADDR, vtophys(&sc->vr_ldata->vr_tx_list[0])); 1466 1467 /* 1468 * Enable interrupts, unless we are polling. 1469 */ 1470 CSR_WRITE_2(sc, VR_ISR, 0xFFFF); 1471 if ((ifp->if_flags & IFF_POLLING) == 0) 1472 CSR_WRITE_2(sc, VR_IMR, VR_INTRS); 1473 1474 mii_mediachg(mii); 1475 1476 ifp->if_flags |= IFF_RUNNING; 1477 ifp->if_flags &= ~IFF_OACTIVE; 1478 1479 callout_reset(&sc->vr_stat_timer, hz, vr_tick, sc); 1480 } 1481 1482 /* 1483 * Set media options. 1484 */ 1485 static int 1486 vr_ifmedia_upd(struct ifnet *ifp) 1487 { 1488 struct vr_softc *sc; 1489 1490 sc = ifp->if_softc; 1491 1492 if (ifp->if_flags & IFF_UP) 1493 vr_init(sc); 1494 1495 return(0); 1496 } 1497 1498 /* 1499 * Report current media status. 1500 */ 1501 static void 1502 vr_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 1503 { 1504 struct vr_softc *sc; 1505 struct mii_data *mii; 1506 1507 sc = ifp->if_softc; 1508 mii = device_get_softc(sc->vr_miibus); 1509 mii_pollstat(mii); 1510 ifmr->ifm_active = mii->mii_media_active; 1511 ifmr->ifm_status = mii->mii_media_status; 1512 } 1513 1514 static int 1515 vr_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr) 1516 { 1517 struct vr_softc *sc = ifp->if_softc; 1518 struct ifreq *ifr = (struct ifreq *) data; 1519 struct mii_data *mii; 1520 int error = 0; 1521 1522 switch(command) { 1523 case SIOCSIFFLAGS: 1524 if (ifp->if_flags & IFF_UP) { 1525 vr_init(sc); 1526 } else { 1527 if (ifp->if_flags & IFF_RUNNING) 1528 vr_stop(sc); 1529 } 1530 error = 0; 1531 break; 1532 case SIOCADDMULTI: 1533 case SIOCDELMULTI: 1534 vr_setmulti(sc); 1535 error = 0; 1536 break; 1537 case SIOCGIFMEDIA: 1538 case SIOCSIFMEDIA: 1539 mii = device_get_softc(sc->vr_miibus); 1540 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 1541 break; 1542 default: 1543 error = ether_ioctl(ifp, command, data); 1544 break; 1545 } 1546 return(error); 1547 } 1548 1549 #ifdef DEVICE_POLLING 1550 1551 static void 1552 vr_poll(struct ifnet *ifp, enum poll_cmd cmd, int count) 1553 { 1554 struct vr_softc *sc = ifp->if_softc; 1555 1556 switch(cmd) { 1557 case POLL_REGISTER: 1558 /* disable interrupts */ 1559 CSR_WRITE_2(sc, VR_IMR, 0x0000); 1560 break; 1561 case POLL_DEREGISTER: 1562 /* enable interrupts */ 1563 CSR_WRITE_2(sc, VR_IMR, VR_INTRS); 1564 break; 1565 default: 1566 vr_intr(sc); 1567 break; 1568 } 1569 } 1570 #endif 1571 1572 static void 1573 vr_watchdog(struct ifnet *ifp) 1574 { 1575 struct vr_softc *sc; 1576 1577 sc = ifp->if_softc; 1578 1579 ifp->if_oerrors++; 1580 if_printf(ifp, "watchdog timeout\n"); 1581 1582 #ifdef DEVICE_POLLING 1583 if (++sc->vr_wdogerrors == 1 && (ifp->if_flags & IFF_POLLING) == 0) { 1584 if_printf(ifp, "ints don't seem to be working, " 1585 "emergency switch to polling\n"); 1586 emergency_poll_enable("if_vr"); 1587 ether_poll_register(ifp); /* XXX illegal */ 1588 } else 1589 #endif 1590 { 1591 vr_stop(sc); 1592 vr_reset(sc); 1593 vr_init(sc); 1594 } 1595 1596 if (!ifq_is_empty(&ifp->if_snd)) 1597 vr_start(ifp); 1598 } 1599 1600 /* 1601 * Stop the adapter and free any mbufs allocated to the 1602 * RX and TX lists. 1603 */ 1604 static void 1605 vr_stop(struct vr_softc *sc) 1606 { 1607 int i; 1608 struct ifnet *ifp; 1609 1610 ifp = &sc->arpcom.ac_if; 1611 ifp->if_timer = 0; 1612 1613 callout_stop(&sc->vr_stat_timer); 1614 1615 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_STOP); 1616 VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_RX_ON|VR_CMD_TX_ON)); 1617 CSR_WRITE_2(sc, VR_IMR, 0x0000); 1618 CSR_WRITE_4(sc, VR_TXADDR, 0x00000000); 1619 CSR_WRITE_4(sc, VR_RXADDR, 0x00000000); 1620 1621 /* 1622 * Free data in the RX lists. 1623 */ 1624 for (i = 0; i < VR_RX_LIST_CNT; i++) { 1625 if (sc->vr_cdata.vr_rx_chain[i].vr_mbuf != NULL) { 1626 m_freem(sc->vr_cdata.vr_rx_chain[i].vr_mbuf); 1627 sc->vr_cdata.vr_rx_chain[i].vr_mbuf = NULL; 1628 } 1629 } 1630 bzero(&sc->vr_ldata->vr_rx_list, sizeof(sc->vr_ldata->vr_rx_list)); 1631 1632 /* 1633 * Reset the TX list buffer pointers. 1634 */ 1635 for (i = 0; i < VR_TX_LIST_CNT; i++) 1636 sc->vr_cdata.vr_tx_chain[i].vr_buf = NULL; 1637 1638 bzero(&sc->vr_ldata->vr_tx_list, sizeof(sc->vr_ldata->vr_tx_list)); 1639 1640 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1641 } 1642 1643 /* 1644 * Stop all chip I/O so that the kernel's probe routines don't 1645 * get confused by errant DMAs when rebooting. 1646 */ 1647 static void 1648 vr_shutdown(device_t dev) 1649 { 1650 struct vr_softc *sc; 1651 1652 sc = device_get_softc(dev); 1653 1654 vr_stop(sc); 1655 } 1656