if_rl.c revision 61041
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: head/sys/pci/if_rl.c 61041 2000-05-28 16:13:43Z peter $ 33 */ 34 35/* 36 * RealTek 8129/8139 PCI NIC driver 37 * 38 * Supports several extremely cheap PCI 10/100 adapters based on 39 * the RealTek chipset. Datasheets can be obtained from 40 * www.realtek.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 RealTek 8139 PCI NIC redefines the meaning of 'low end.' This is 49 * probably the worst PCI ethernet controller ever made, with the possible 50 * exception of the FEAST chip made by SMC. The 8139 supports bus-master 51 * DMA, but it has a terrible interface that nullifies any performance 52 * gains that bus-master DMA usually offers. 53 * 54 * For transmission, the chip offers a series of four TX descriptor 55 * registers. Each transmit frame must be in a contiguous buffer, aligned 56 * on a longword (32-bit) boundary. This means we almost always have to 57 * do mbuf copies in order to transmit a frame, except in the unlikely 58 * case where a) the packet fits into a single mbuf, and b) the packet 59 * is 32-bit aligned within the mbuf's data area. The presence of only 60 * four descriptor registers means that we can never have more than four 61 * packets queued for transmission at any one time. 62 * 63 * Reception is not much better. The driver has to allocate a single large 64 * buffer area (up to 64K in size) into which the chip will DMA received 65 * frames. Because we don't know where within this region received packets 66 * will begin or end, we have no choice but to copy data from the buffer 67 * area into mbufs in order to pass the packets up to the higher protocol 68 * levels. 69 * 70 * It's impossible given this rotten design to really achieve decent 71 * performance at 100Mbps, unless you happen to have a 400Mhz PII or 72 * some equally overmuscled CPU to drive it. 73 * 74 * On the bright side, the 8139 does have a built-in PHY, although 75 * rather than using an MDIO serial interface like most other NICs, the 76 * PHY registers are directly accessible through the 8139's register 77 * space. The 8139 supports autonegotiation, as well as a 64-bit multicast 78 * filter. 79 * 80 * The 8129 chip is an older version of the 8139 that uses an external PHY 81 * chip. The 8129 has a serial MDIO interface for accessing the MII where 82 * the 8139 lets you directly access the on-board PHY registers. We need 83 * to select which interface to use depending on the chip type. 84 */ 85 86#include <sys/param.h> 87#include <sys/systm.h> 88#include <sys/sockio.h> 89#include <sys/mbuf.h> 90#include <sys/malloc.h> 91#include <sys/kernel.h> 92#include <sys/socket.h> 93 94#include <net/if.h> 95#include <net/if_arp.h> 96#include <net/ethernet.h> 97#include <net/if_dl.h> 98#include <net/if_media.h> 99 100#include <net/bpf.h> 101 102#include <vm/vm.h> /* for vtophys */ 103#include <vm/pmap.h> /* for vtophys */ 104#include <machine/clock.h> /* for DELAY */ 105#include <machine/bus_pio.h> 106#include <machine/bus_memio.h> 107#include <machine/bus.h> 108#include <machine/resource.h> 109#include <sys/bus.h> 110#include <sys/rman.h> 111 112#include <dev/mii/mii.h> 113#include <dev/mii/miivar.h> 114 115#include <pci/pcireg.h> 116#include <pci/pcivar.h> 117 118MODULE_DEPEND(rl, miibus, 1, 1, 1); 119 120/* "controller miibus0" required. See GENERIC if you get errors here. */ 121#include "miibus_if.h" 122 123/* 124 * Default to using PIO access for this driver. On SMP systems, 125 * there appear to be problems with memory mapped mode: it looks like 126 * doing too many memory mapped access back to back in rapid succession 127 * can hang the bus. I'm inclined to blame this on crummy design/construction 128 * on the part of RealTek. Memory mapped mode does appear to work on 129 * uniprocessor systems though. 130 */ 131#define RL_USEIOSPACE 132 133#include <pci/if_rlreg.h> 134 135#ifndef lint 136static const char rcsid[] = 137 "$FreeBSD: head/sys/pci/if_rl.c 61041 2000-05-28 16:13:43Z peter $"; 138#endif 139 140/* 141 * Various supported device vendors/types and their names. 142 */ 143static struct rl_type rl_devs[] = { 144 { RT_VENDORID, RT_DEVICEID_8129, 145 "RealTek 8129 10/100BaseTX" }, 146 { RT_VENDORID, RT_DEVICEID_8139, 147 "RealTek 8139 10/100BaseTX" }, 148 { ACCTON_VENDORID, ACCTON_DEVICEID_5030, 149 "Accton MPX 5030/5038 10/100BaseTX" }, 150 { DELTA_VENDORID, DELTA_DEVICEID_8139, 151 "Delta Electronics 8139 10/100BaseTX" }, 152 { ADDTRON_VENDORID, ADDTRON_DEVICEID_8139, 153 "Addtron Technolgy 8139 10/100BaseTX" }, 154 { 0, 0, NULL } 155}; 156 157static int rl_probe __P((device_t)); 158static int rl_attach __P((device_t)); 159static int rl_detach __P((device_t)); 160 161static int rl_encap __P((struct rl_softc *, struct mbuf * )); 162 163static void rl_rxeof __P((struct rl_softc *)); 164static void rl_txeof __P((struct rl_softc *)); 165static void rl_intr __P((void *)); 166static void rl_tick __P((void *)); 167static void rl_start __P((struct ifnet *)); 168static int rl_ioctl __P((struct ifnet *, u_long, caddr_t)); 169static void rl_init __P((void *)); 170static void rl_stop __P((struct rl_softc *)); 171static void rl_watchdog __P((struct ifnet *)); 172static void rl_shutdown __P((device_t)); 173static int rl_ifmedia_upd __P((struct ifnet *)); 174static void rl_ifmedia_sts __P((struct ifnet *, struct ifmediareq *)); 175 176static void rl_eeprom_putbyte __P((struct rl_softc *, int)); 177static void rl_eeprom_getword __P((struct rl_softc *, int, u_int16_t *)); 178static void rl_read_eeprom __P((struct rl_softc *, caddr_t, 179 int, int, int)); 180static void rl_mii_sync __P((struct rl_softc *)); 181static void rl_mii_send __P((struct rl_softc *, u_int32_t, int)); 182static int rl_mii_readreg __P((struct rl_softc *, struct rl_mii_frame *)); 183static int rl_mii_writereg __P((struct rl_softc *, struct rl_mii_frame *)); 184 185static int rl_miibus_readreg __P((device_t, int, int)); 186static int rl_miibus_writereg __P((device_t, int, int, int)); 187static void rl_miibus_statchg __P((device_t)); 188 189static u_int8_t rl_calchash __P((caddr_t)); 190static void rl_setmulti __P((struct rl_softc *)); 191static void rl_reset __P((struct rl_softc *)); 192static int rl_list_tx_init __P((struct rl_softc *)); 193 194#ifdef RL_USEIOSPACE 195#define RL_RES SYS_RES_IOPORT 196#define RL_RID RL_PCI_LOIO 197#else 198#define RL_RES SYS_RES_MEMORY 199#define RL_RID RL_PCI_LOMEM 200#endif 201 202static device_method_t rl_methods[] = { 203 /* Device interface */ 204 DEVMETHOD(device_probe, rl_probe), 205 DEVMETHOD(device_attach, rl_attach), 206 DEVMETHOD(device_detach, rl_detach), 207 DEVMETHOD(device_shutdown, rl_shutdown), 208 209 /* bus interface */ 210 DEVMETHOD(bus_print_child, bus_generic_print_child), 211 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 212 213 /* MII interface */ 214 DEVMETHOD(miibus_readreg, rl_miibus_readreg), 215 DEVMETHOD(miibus_writereg, rl_miibus_writereg), 216 DEVMETHOD(miibus_statchg, rl_miibus_statchg), 217 218 { 0, 0 } 219}; 220 221static driver_t rl_driver = { 222 "rl", 223 rl_methods, 224 sizeof(struct rl_softc) 225}; 226 227static devclass_t rl_devclass; 228 229DRIVER_MODULE(if_rl, pci, rl_driver, rl_devclass, 0, 0); 230DRIVER_MODULE(miibus, rl, miibus_driver, miibus_devclass, 0, 0); 231 232#define EE_SET(x) \ 233 CSR_WRITE_1(sc, RL_EECMD, \ 234 CSR_READ_1(sc, RL_EECMD) | x) 235 236#define EE_CLR(x) \ 237 CSR_WRITE_1(sc, RL_EECMD, \ 238 CSR_READ_1(sc, RL_EECMD) & ~x) 239 240/* 241 * Send a read command and address to the EEPROM, check for ACK. 242 */ 243static void rl_eeprom_putbyte(sc, addr) 244 struct rl_softc *sc; 245 int addr; 246{ 247 register int d, i; 248 249 d = addr | RL_EECMD_READ; 250 251 /* 252 * Feed in each bit and strobe the clock. 253 */ 254 for (i = 0x400; i; i >>= 1) { 255 if (d & i) { 256 EE_SET(RL_EE_DATAIN); 257 } else { 258 EE_CLR(RL_EE_DATAIN); 259 } 260 DELAY(100); 261 EE_SET(RL_EE_CLK); 262 DELAY(150); 263 EE_CLR(RL_EE_CLK); 264 DELAY(100); 265 } 266 267 return; 268} 269 270/* 271 * Read a word of data stored in the EEPROM at address 'addr.' 272 */ 273static void rl_eeprom_getword(sc, addr, dest) 274 struct rl_softc *sc; 275 int addr; 276 u_int16_t *dest; 277{ 278 register int i; 279 u_int16_t word = 0; 280 281 /* Enter EEPROM access mode. */ 282 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL); 283 284 /* 285 * Send address of word we want to read. 286 */ 287 rl_eeprom_putbyte(sc, addr); 288 289 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL); 290 291 /* 292 * Start reading bits from EEPROM. 293 */ 294 for (i = 0x8000; i; i >>= 1) { 295 EE_SET(RL_EE_CLK); 296 DELAY(100); 297 if (CSR_READ_1(sc, RL_EECMD) & RL_EE_DATAOUT) 298 word |= i; 299 EE_CLR(RL_EE_CLK); 300 DELAY(100); 301 } 302 303 /* Turn off EEPROM access mode. */ 304 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF); 305 306 *dest = word; 307 308 return; 309} 310 311/* 312 * Read a sequence of words from the EEPROM. 313 */ 314static void rl_read_eeprom(sc, dest, off, cnt, swap) 315 struct rl_softc *sc; 316 caddr_t dest; 317 int off; 318 int cnt; 319 int swap; 320{ 321 int i; 322 u_int16_t word = 0, *ptr; 323 324 for (i = 0; i < cnt; i++) { 325 rl_eeprom_getword(sc, off + i, &word); 326 ptr = (u_int16_t *)(dest + (i * 2)); 327 if (swap) 328 *ptr = ntohs(word); 329 else 330 *ptr = word; 331 } 332 333 return; 334} 335 336 337/* 338 * MII access routines are provided for the 8129, which 339 * doesn't have a built-in PHY. For the 8139, we fake things 340 * up by diverting rl_phy_readreg()/rl_phy_writereg() to the 341 * direct access PHY registers. 342 */ 343#define MII_SET(x) \ 344 CSR_WRITE_1(sc, RL_MII, \ 345 CSR_READ_1(sc, RL_MII) | x) 346 347#define MII_CLR(x) \ 348 CSR_WRITE_1(sc, RL_MII, \ 349 CSR_READ_1(sc, RL_MII) & ~x) 350 351/* 352 * Sync the PHYs by setting data bit and strobing the clock 32 times. 353 */ 354static void rl_mii_sync(sc) 355 struct rl_softc *sc; 356{ 357 register int i; 358 359 MII_SET(RL_MII_DIR|RL_MII_DATAOUT); 360 361 for (i = 0; i < 32; i++) { 362 MII_SET(RL_MII_CLK); 363 DELAY(1); 364 MII_CLR(RL_MII_CLK); 365 DELAY(1); 366 } 367 368 return; 369} 370 371/* 372 * Clock a series of bits through the MII. 373 */ 374static void rl_mii_send(sc, bits, cnt) 375 struct rl_softc *sc; 376 u_int32_t bits; 377 int cnt; 378{ 379 int i; 380 381 MII_CLR(RL_MII_CLK); 382 383 for (i = (0x1 << (cnt - 1)); i; i >>= 1) { 384 if (bits & i) { 385 MII_SET(RL_MII_DATAOUT); 386 } else { 387 MII_CLR(RL_MII_DATAOUT); 388 } 389 DELAY(1); 390 MII_CLR(RL_MII_CLK); 391 DELAY(1); 392 MII_SET(RL_MII_CLK); 393 } 394} 395 396/* 397 * Read an PHY register through the MII. 398 */ 399static int rl_mii_readreg(sc, frame) 400 struct rl_softc *sc; 401 struct rl_mii_frame *frame; 402 403{ 404 int i, ack, s; 405 406 s = splimp(); 407 408 /* 409 * Set up frame for RX. 410 */ 411 frame->mii_stdelim = RL_MII_STARTDELIM; 412 frame->mii_opcode = RL_MII_READOP; 413 frame->mii_turnaround = 0; 414 frame->mii_data = 0; 415 416 CSR_WRITE_2(sc, RL_MII, 0); 417 418 /* 419 * Turn on data xmit. 420 */ 421 MII_SET(RL_MII_DIR); 422 423 rl_mii_sync(sc); 424 425 /* 426 * Send command/address info. 427 */ 428 rl_mii_send(sc, frame->mii_stdelim, 2); 429 rl_mii_send(sc, frame->mii_opcode, 2); 430 rl_mii_send(sc, frame->mii_phyaddr, 5); 431 rl_mii_send(sc, frame->mii_regaddr, 5); 432 433 /* Idle bit */ 434 MII_CLR((RL_MII_CLK|RL_MII_DATAOUT)); 435 DELAY(1); 436 MII_SET(RL_MII_CLK); 437 DELAY(1); 438 439 /* Turn off xmit. */ 440 MII_CLR(RL_MII_DIR); 441 442 /* Check for ack */ 443 MII_CLR(RL_MII_CLK); 444 DELAY(1); 445 MII_SET(RL_MII_CLK); 446 DELAY(1); 447 ack = CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN; 448 449 /* 450 * Now try reading data bits. If the ack failed, we still 451 * need to clock through 16 cycles to keep the PHY(s) in sync. 452 */ 453 if (ack) { 454 for(i = 0; i < 16; i++) { 455 MII_CLR(RL_MII_CLK); 456 DELAY(1); 457 MII_SET(RL_MII_CLK); 458 DELAY(1); 459 } 460 goto fail; 461 } 462 463 for (i = 0x8000; i; i >>= 1) { 464 MII_CLR(RL_MII_CLK); 465 DELAY(1); 466 if (!ack) { 467 if (CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN) 468 frame->mii_data |= i; 469 DELAY(1); 470 } 471 MII_SET(RL_MII_CLK); 472 DELAY(1); 473 } 474 475fail: 476 477 MII_CLR(RL_MII_CLK); 478 DELAY(1); 479 MII_SET(RL_MII_CLK); 480 DELAY(1); 481 482 splx(s); 483 484 if (ack) 485 return(1); 486 return(0); 487} 488 489/* 490 * Write to a PHY register through the MII. 491 */ 492static int rl_mii_writereg(sc, frame) 493 struct rl_softc *sc; 494 struct rl_mii_frame *frame; 495 496{ 497 int s; 498 499 s = splimp(); 500 /* 501 * Set up frame for TX. 502 */ 503 504 frame->mii_stdelim = RL_MII_STARTDELIM; 505 frame->mii_opcode = RL_MII_WRITEOP; 506 frame->mii_turnaround = RL_MII_TURNAROUND; 507 508 /* 509 * Turn on data output. 510 */ 511 MII_SET(RL_MII_DIR); 512 513 rl_mii_sync(sc); 514 515 rl_mii_send(sc, frame->mii_stdelim, 2); 516 rl_mii_send(sc, frame->mii_opcode, 2); 517 rl_mii_send(sc, frame->mii_phyaddr, 5); 518 rl_mii_send(sc, frame->mii_regaddr, 5); 519 rl_mii_send(sc, frame->mii_turnaround, 2); 520 rl_mii_send(sc, frame->mii_data, 16); 521 522 /* Idle bit. */ 523 MII_SET(RL_MII_CLK); 524 DELAY(1); 525 MII_CLR(RL_MII_CLK); 526 DELAY(1); 527 528 /* 529 * Turn off xmit. 530 */ 531 MII_CLR(RL_MII_DIR); 532 533 splx(s); 534 535 return(0); 536} 537 538static int rl_miibus_readreg(dev, phy, reg) 539 device_t dev; 540 int phy, reg; 541{ 542 struct rl_softc *sc; 543 struct rl_mii_frame frame; 544 u_int16_t rval = 0; 545 u_int16_t rl8139_reg = 0; 546 547 sc = device_get_softc(dev); 548 549 if (sc->rl_type == RL_8139) { 550 /* Pretend the internal PHY is only at address 0 */ 551 if (phy) 552 return(0); 553 switch(reg) { 554 case MII_BMCR: 555 rl8139_reg = RL_BMCR; 556 break; 557 case MII_BMSR: 558 rl8139_reg = RL_BMSR; 559 break; 560 case MII_ANAR: 561 rl8139_reg = RL_ANAR; 562 break; 563 case MII_ANER: 564 rl8139_reg = RL_ANER; 565 break; 566 case MII_ANLPAR: 567 rl8139_reg = RL_LPAR; 568 break; 569 case MII_PHYIDR1: 570 case MII_PHYIDR2: 571 return(0); 572 break; 573 default: 574 printf("rl%d: bad phy register\n", sc->rl_unit); 575 return(0); 576 } 577 rval = CSR_READ_2(sc, rl8139_reg); 578 return(rval); 579 } 580 581 bzero((char *)&frame, sizeof(frame)); 582 583 frame.mii_phyaddr = phy; 584 frame.mii_regaddr = reg; 585 rl_mii_readreg(sc, &frame); 586 587 return(frame.mii_data); 588} 589 590static int rl_miibus_writereg(dev, phy, reg, data) 591 device_t dev; 592 int phy, reg, data; 593{ 594 struct rl_softc *sc; 595 struct rl_mii_frame frame; 596 u_int16_t rl8139_reg = 0; 597 598 sc = device_get_softc(dev); 599 600 if (sc->rl_type == RL_8139) { 601 /* Pretend the internal PHY is only at address 0 */ 602 if (phy) 603 return(0); 604 switch(reg) { 605 case MII_BMCR: 606 rl8139_reg = RL_BMCR; 607 break; 608 case MII_BMSR: 609 rl8139_reg = RL_BMSR; 610 break; 611 case MII_ANAR: 612 rl8139_reg = RL_ANAR; 613 break; 614 case MII_ANER: 615 rl8139_reg = RL_ANER; 616 break; 617 case MII_ANLPAR: 618 rl8139_reg = RL_LPAR; 619 break; 620 case MII_PHYIDR1: 621 case MII_PHYIDR2: 622 return(0); 623 break; 624 default: 625 printf("rl%d: bad phy register\n", sc->rl_unit); 626 return(0); 627 } 628 CSR_WRITE_2(sc, rl8139_reg, data); 629 return(0); 630 } 631 632 bzero((char *)&frame, sizeof(frame)); 633 634 frame.mii_phyaddr = phy; 635 frame.mii_regaddr = reg; 636 frame.mii_data = data; 637 638 rl_mii_writereg(sc, &frame); 639 640 return(0); 641} 642 643static void rl_miibus_statchg(dev) 644 device_t dev; 645{ 646 return; 647} 648 649/* 650 * Calculate CRC of a multicast group address, return the upper 6 bits. 651 */ 652static u_int8_t rl_calchash(addr) 653 caddr_t addr; 654{ 655 u_int32_t crc, carry; 656 int i, j; 657 u_int8_t c; 658 659 /* Compute CRC for the address value. */ 660 crc = 0xFFFFFFFF; /* initial value */ 661 662 for (i = 0; i < 6; i++) { 663 c = *(addr + i); 664 for (j = 0; j < 8; j++) { 665 carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01); 666 crc <<= 1; 667 c >>= 1; 668 if (carry) 669 crc = (crc ^ 0x04c11db6) | carry; 670 } 671 } 672 673 /* return the filter bit position */ 674 return(crc >> 26); 675} 676 677/* 678 * Program the 64-bit multicast hash filter. 679 */ 680static void rl_setmulti(sc) 681 struct rl_softc *sc; 682{ 683 struct ifnet *ifp; 684 int h = 0; 685 u_int32_t hashes[2] = { 0, 0 }; 686 struct ifmultiaddr *ifma; 687 u_int32_t rxfilt; 688 int mcnt = 0; 689 690 ifp = &sc->arpcom.ac_if; 691 692 rxfilt = CSR_READ_4(sc, RL_RXCFG); 693 694 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { 695 rxfilt |= RL_RXCFG_RX_MULTI; 696 CSR_WRITE_4(sc, RL_RXCFG, rxfilt); 697 CSR_WRITE_4(sc, RL_MAR0, 0xFFFFFFFF); 698 CSR_WRITE_4(sc, RL_MAR4, 0xFFFFFFFF); 699 return; 700 } 701 702 /* first, zot all the existing hash bits */ 703 CSR_WRITE_4(sc, RL_MAR0, 0); 704 CSR_WRITE_4(sc, RL_MAR4, 0); 705 706 /* now program new ones */ 707 for (ifma = ifp->if_multiaddrs.lh_first; ifma != NULL; 708 ifma = ifma->ifma_link.le_next) { 709 if (ifma->ifma_addr->sa_family != AF_LINK) 710 continue; 711 h = rl_calchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); 712 if (h < 32) 713 hashes[0] |= (1 << h); 714 else 715 hashes[1] |= (1 << (h - 32)); 716 mcnt++; 717 } 718 719 if (mcnt) 720 rxfilt |= RL_RXCFG_RX_MULTI; 721 else 722 rxfilt &= ~RL_RXCFG_RX_MULTI; 723 724 CSR_WRITE_4(sc, RL_RXCFG, rxfilt); 725 CSR_WRITE_4(sc, RL_MAR0, hashes[0]); 726 CSR_WRITE_4(sc, RL_MAR4, hashes[1]); 727 728 return; 729} 730 731static void rl_reset(sc) 732 struct rl_softc *sc; 733{ 734 register int i; 735 736 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_RESET); 737 738 for (i = 0; i < RL_TIMEOUT; i++) { 739 DELAY(10); 740 if (!(CSR_READ_1(sc, RL_COMMAND) & RL_CMD_RESET)) 741 break; 742 } 743 if (i == RL_TIMEOUT) 744 printf("rl%d: reset never completed!\n", sc->rl_unit); 745 746 return; 747} 748 749/* 750 * Probe for a RealTek 8129/8139 chip. Check the PCI vendor and device 751 * IDs against our list and return a device name if we find a match. 752 */ 753static int rl_probe(dev) 754 device_t dev; 755{ 756 struct rl_type *t; 757 758 t = rl_devs; 759 760 while(t->rl_name != NULL) { 761 if ((pci_get_vendor(dev) == t->rl_vid) && 762 (pci_get_device(dev) == t->rl_did)) { 763 device_set_desc(dev, t->rl_name); 764 return(0); 765 } 766 t++; 767 } 768 769 return(ENXIO); 770} 771 772/* 773 * Attach the interface. Allocate softc structures, do ifmedia 774 * setup and ethernet/BPF attach. 775 */ 776static int rl_attach(dev) 777 device_t dev; 778{ 779 int s; 780 u_char eaddr[ETHER_ADDR_LEN]; 781 u_int32_t command; 782 struct rl_softc *sc; 783 struct ifnet *ifp; 784 u_int16_t rl_did = 0; 785 int unit, error = 0, rid; 786 787 s = splimp(); 788 789 sc = device_get_softc(dev); 790 unit = device_get_unit(dev); 791 bzero(sc, sizeof(struct rl_softc)); 792 793 /* 794 * Handle power management nonsense. 795 */ 796 797 command = pci_read_config(dev, RL_PCI_CAPID, 4) & 0x000000FF; 798 if (command == 0x01) { 799 800 command = pci_read_config(dev, RL_PCI_PWRMGMTCTRL, 4); 801 if (command & RL_PSTATE_MASK) { 802 u_int32_t iobase, membase, irq; 803 804 /* Save important PCI config data. */ 805 iobase = pci_read_config(dev, RL_PCI_LOIO, 4); 806 membase = pci_read_config(dev, RL_PCI_LOMEM, 4); 807 irq = pci_read_config(dev, RL_PCI_INTLINE, 4); 808 809 /* Reset the power state. */ 810 printf("rl%d: chip is is in D%d power mode " 811 "-- setting to D0\n", unit, command & RL_PSTATE_MASK); 812 command &= 0xFFFFFFFC; 813 pci_write_config(dev, RL_PCI_PWRMGMTCTRL, command, 4); 814 815 /* Restore PCI config data. */ 816 pci_write_config(dev, RL_PCI_LOIO, iobase, 4); 817 pci_write_config(dev, RL_PCI_LOMEM, membase, 4); 818 pci_write_config(dev, RL_PCI_INTLINE, irq, 4); 819 } 820 } 821 822 /* 823 * Map control/status registers. 824 */ 825 command = pci_read_config(dev, PCIR_COMMAND, 4); 826 command |= (PCIM_CMD_PORTEN|PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN); 827 pci_write_config(dev, PCIR_COMMAND, command, 4); 828 command = pci_read_config(dev, PCIR_COMMAND, 4); 829 830#ifdef RL_USEIOSPACE 831 if (!(command & PCIM_CMD_PORTEN)) { 832 printf("rl%d: failed to enable I/O ports!\n", unit); 833 error = ENXIO; 834 goto fail; 835 } 836#else 837 if (!(command & PCIM_CMD_MEMEN)) { 838 printf("rl%d: failed to enable memory mapping!\n", unit); 839 error = ENXIO; 840 goto fail; 841 } 842#endif 843 844 rid = RL_RID; 845 sc->rl_res = bus_alloc_resource(dev, RL_RES, &rid, 846 0, ~0, 1, RF_ACTIVE); 847 848 if (sc->rl_res == NULL) { 849 printf ("rl%d: couldn't map ports/memory\n", unit); 850 error = ENXIO; 851 goto fail; 852 } 853 854 sc->rl_btag = rman_get_bustag(sc->rl_res); 855 sc->rl_bhandle = rman_get_bushandle(sc->rl_res); 856 857 rid = 0; 858 sc->rl_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, 859 RF_SHAREABLE | RF_ACTIVE); 860 861 if (sc->rl_irq == NULL) { 862 printf("rl%d: couldn't map interrupt\n", unit); 863 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 864 error = ENXIO; 865 goto fail; 866 } 867 868 error = bus_setup_intr(dev, sc->rl_irq, INTR_TYPE_NET, 869 rl_intr, sc, &sc->rl_intrhand); 870 871 if (error) { 872 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_res); 873 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 874 printf("rl%d: couldn't set up irq\n", unit); 875 goto fail; 876 } 877 878 callout_handle_init(&sc->rl_stat_ch); 879 880 /* Reset the adapter. */ 881 rl_reset(sc); 882 883 /* 884 * Get station address from the EEPROM. 885 */ 886 rl_read_eeprom(sc, (caddr_t)&eaddr, RL_EE_EADDR, 3, 0); 887 888 /* 889 * A RealTek chip was detected. Inform the world. 890 */ 891 printf("rl%d: Ethernet address: %6D\n", unit, eaddr, ":"); 892 893 sc->rl_unit = unit; 894 bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN); 895 896 /* 897 * Now read the exact device type from the EEPROM to find 898 * out if it's an 8129 or 8139. 899 */ 900 rl_read_eeprom(sc, (caddr_t)&rl_did, RL_EE_PCI_DID, 1, 0); 901 902 if (rl_did == RT_DEVICEID_8139 || rl_did == ACCTON_DEVICEID_5030 || 903 rl_did == DELTA_DEVICEID_8139 || rl_did == ADDTRON_DEVICEID_8139) 904 sc->rl_type = RL_8139; 905 else if (rl_did == RT_DEVICEID_8129) 906 sc->rl_type = RL_8129; 907 else { 908 printf("rl%d: unknown device ID: %x\n", unit, rl_did); 909 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand); 910 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_res); 911 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 912 error = ENXIO; 913 goto fail; 914 } 915 916 sc->rl_cdata.rl_rx_buf = contigmalloc(RL_RXBUFLEN + 1518, M_DEVBUF, 917 M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0); 918 919 if (sc->rl_cdata.rl_rx_buf == NULL) { 920 printf("rl%d: no memory for list buffers!\n", unit); 921 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand); 922 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_res); 923 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 924 error = ENXIO; 925 goto fail; 926 } 927 928 /* Leave a few bytes before the start of the RX ring buffer. */ 929 sc->rl_cdata.rl_rx_buf_ptr = sc->rl_cdata.rl_rx_buf; 930 sc->rl_cdata.rl_rx_buf += sizeof(u_int64_t); 931 932 /* Do MII setup */ 933 if (mii_phy_probe(dev, &sc->rl_miibus, 934 rl_ifmedia_upd, rl_ifmedia_sts)) { 935 printf("rl%d: MII without any phy!\n", sc->rl_unit); 936 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand); 937 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_res); 938 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 939 free(sc->rl_cdata.rl_rx_buf, M_DEVBUF); 940 error = ENXIO; 941 goto fail; 942 } 943 944 ifp = &sc->arpcom.ac_if; 945 ifp->if_softc = sc; 946 ifp->if_unit = unit; 947 ifp->if_name = "rl"; 948 ifp->if_mtu = ETHERMTU; 949 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 950 ifp->if_ioctl = rl_ioctl; 951 ifp->if_output = ether_output; 952 ifp->if_start = rl_start; 953 ifp->if_watchdog = rl_watchdog; 954 ifp->if_init = rl_init; 955 ifp->if_baudrate = 10000000; 956 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 957 958 /* 959 * Call MI attach routines. 960 */ 961 if_attach(ifp); 962 ether_ifattach(ifp); 963 964 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 965 966fail: 967 splx(s); 968 return(error); 969} 970 971static int rl_detach(dev) 972 device_t dev; 973{ 974 struct rl_softc *sc; 975 struct ifnet *ifp; 976 int s; 977 978 s = splimp(); 979 980 sc = device_get_softc(dev); 981 ifp = &sc->arpcom.ac_if; 982 983 if_detach(ifp); 984 rl_stop(sc); 985 986 bus_generic_detach(dev); 987 device_delete_child(dev, sc->rl_miibus); 988 989 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand); 990 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_res); 991 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 992 993 contigfree(sc->rl_cdata.rl_rx_buf, RL_RXBUFLEN + 32, M_DEVBUF); 994 995 splx(s); 996 997 return(0); 998} 999 1000/* 1001 * Initialize the transmit descriptors. 1002 */ 1003static int rl_list_tx_init(sc) 1004 struct rl_softc *sc; 1005{ 1006 struct rl_chain_data *cd; 1007 int i; 1008 1009 cd = &sc->rl_cdata; 1010 for (i = 0; i < RL_TX_LIST_CNT; i++) { 1011 cd->rl_tx_chain[i] = NULL; 1012 CSR_WRITE_4(sc, 1013 RL_TXADDR0 + (i * sizeof(u_int32_t)), 0x0000000); 1014 } 1015 1016 sc->rl_cdata.cur_tx = 0; 1017 sc->rl_cdata.last_tx = 0; 1018 1019 return(0); 1020} 1021 1022/* 1023 * A frame has been uploaded: pass the resulting mbuf chain up to 1024 * the higher level protocols. 1025 * 1026 * You know there's something wrong with a PCI bus-master chip design 1027 * when you have to use m_devget(). 1028 * 1029 * The receive operation is badly documented in the datasheet, so I'll 1030 * attempt to document it here. The driver provides a buffer area and 1031 * places its base address in the RX buffer start address register. 1032 * The chip then begins copying frames into the RX buffer. Each frame 1033 * is preceeded by a 32-bit RX status word which specifies the length 1034 * of the frame and certain other status bits. Each frame (starting with 1035 * the status word) is also 32-bit aligned. The frame length is in the 1036 * first 16 bits of the status word; the lower 15 bits correspond with 1037 * the 'rx status register' mentioned in the datasheet. 1038 * 1039 * Note: to make the Alpha happy, the frame payload needs to be aligned 1040 * on a 32-bit boundary. To achieve this, we cheat a bit by copying from 1041 * the ring buffer starting at an address two bytes before the actual 1042 * data location. We can then shave off the first two bytes using m_adj(). 1043 * The reason we do this is because m_devget() doesn't let us specify an 1044 * offset into the mbuf storage space, so we have to artificially create 1045 * one. The ring is allocated in such a way that there are a few unused 1046 * bytes of space preceecing it so that it will be safe for us to do the 1047 * 2-byte backstep even if reading from the ring at offset 0. 1048 */ 1049static void rl_rxeof(sc) 1050 struct rl_softc *sc; 1051{ 1052 struct ether_header *eh; 1053 struct mbuf *m; 1054 struct ifnet *ifp; 1055 int total_len = 0; 1056 u_int32_t rxstat; 1057 caddr_t rxbufpos; 1058 int wrap = 0; 1059 u_int16_t cur_rx; 1060 u_int16_t limit; 1061 u_int16_t rx_bytes = 0, max_bytes; 1062 1063 ifp = &sc->arpcom.ac_if; 1064 1065 cur_rx = (CSR_READ_2(sc, RL_CURRXADDR) + 16) % RL_RXBUFLEN; 1066 1067 /* Do not try to read past this point. */ 1068 limit = CSR_READ_2(sc, RL_CURRXBUF) % RL_RXBUFLEN; 1069 1070 if (limit < cur_rx) 1071 max_bytes = (RL_RXBUFLEN - cur_rx) + limit; 1072 else 1073 max_bytes = limit - cur_rx; 1074 1075 while((CSR_READ_1(sc, RL_COMMAND) & RL_CMD_EMPTY_RXBUF) == 0) { 1076 rxbufpos = sc->rl_cdata.rl_rx_buf + cur_rx; 1077 rxstat = *(u_int32_t *)rxbufpos; 1078 1079 /* 1080 * Here's a totally undocumented fact for you. When the 1081 * RealTek chip is in the process of copying a packet into 1082 * RAM for you, the length will be 0xfff0. If you spot a 1083 * packet header with this value, you need to stop. The 1084 * datasheet makes absolutely no mention of this and 1085 * RealTek should be shot for this. 1086 */ 1087 if ((u_int16_t)(rxstat >> 16) == RL_RXSTAT_UNFINISHED) 1088 break; 1089 1090 if (!(rxstat & RL_RXSTAT_RXOK)) { 1091 ifp->if_ierrors++; 1092 rl_init(sc); 1093 return; 1094 } 1095 1096 /* No errors; receive the packet. */ 1097 total_len = rxstat >> 16; 1098 rx_bytes += total_len + 4; 1099 1100 /* 1101 * XXX The RealTek chip includes the CRC with every 1102 * received frame, and there's no way to turn this 1103 * behavior off (at least, I can't find anything in 1104 * the manual that explains how to do it) so we have 1105 * to trim off the CRC manually. 1106 */ 1107 total_len -= ETHER_CRC_LEN; 1108 1109 /* 1110 * Avoid trying to read more bytes than we know 1111 * the chip has prepared for us. 1112 */ 1113 if (rx_bytes > max_bytes) 1114 break; 1115 1116 rxbufpos = sc->rl_cdata.rl_rx_buf + 1117 ((cur_rx + sizeof(u_int32_t)) % RL_RXBUFLEN); 1118 1119 if (rxbufpos == (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN)) 1120 rxbufpos = sc->rl_cdata.rl_rx_buf; 1121 1122 wrap = (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN) - rxbufpos; 1123 1124 if (total_len > wrap) { 1125 /* 1126 * Fool m_devget() into thinking we want to copy 1127 * the whole buffer so we don't end up fragmenting 1128 * the data. 1129 */ 1130 m = m_devget(rxbufpos - RL_ETHER_ALIGN, 1131 total_len + RL_ETHER_ALIGN, 0, ifp, NULL); 1132 if (m == NULL) { 1133 ifp->if_ierrors++; 1134 printf("rl%d: out of mbufs, tried to " 1135 "copy %d bytes\n", sc->rl_unit, wrap); 1136 } else { 1137 m_adj(m, RL_ETHER_ALIGN); 1138 m_copyback(m, wrap, total_len - wrap, 1139 sc->rl_cdata.rl_rx_buf); 1140 } 1141 cur_rx = (total_len - wrap + ETHER_CRC_LEN); 1142 } else { 1143 m = m_devget(rxbufpos - RL_ETHER_ALIGN, 1144 total_len + RL_ETHER_ALIGN, 0, ifp, NULL); 1145 if (m == NULL) { 1146 ifp->if_ierrors++; 1147 printf("rl%d: out of mbufs, tried to " 1148 "copy %d bytes\n", sc->rl_unit, total_len); 1149 } else 1150 m_adj(m, RL_ETHER_ALIGN); 1151 cur_rx += total_len + 4 + ETHER_CRC_LEN; 1152 } 1153 1154 /* 1155 * Round up to 32-bit boundary. 1156 */ 1157 cur_rx = (cur_rx + 3) & ~3; 1158 CSR_WRITE_2(sc, RL_CURRXADDR, cur_rx - 16); 1159 1160 if (m == NULL) 1161 continue; 1162 1163 eh = mtod(m, struct ether_header *); 1164 ifp->if_ipackets++; 1165 1166 /* Remove header from mbuf and pass it on. */ 1167 m_adj(m, sizeof(struct ether_header)); 1168 ether_input(ifp, eh, m); 1169 } 1170 1171 return; 1172} 1173 1174/* 1175 * A frame was downloaded to the chip. It's safe for us to clean up 1176 * the list buffers. 1177 */ 1178static void rl_txeof(sc) 1179 struct rl_softc *sc; 1180{ 1181 struct ifnet *ifp; 1182 u_int32_t txstat; 1183 1184 ifp = &sc->arpcom.ac_if; 1185 1186 /* Clear the timeout timer. */ 1187 ifp->if_timer = 0; 1188 1189 /* 1190 * Go through our tx list and free mbufs for those 1191 * frames that have been uploaded. 1192 */ 1193 do { 1194 txstat = CSR_READ_4(sc, RL_LAST_TXSTAT(sc)); 1195 if (!(txstat & (RL_TXSTAT_TX_OK| 1196 RL_TXSTAT_TX_UNDERRUN|RL_TXSTAT_TXABRT))) 1197 break; 1198 1199 ifp->if_collisions += (txstat & RL_TXSTAT_COLLCNT) >> 24; 1200 1201 if (RL_LAST_TXMBUF(sc) != NULL) { 1202 m_freem(RL_LAST_TXMBUF(sc)); 1203 RL_LAST_TXMBUF(sc) = NULL; 1204 } 1205 if (txstat & RL_TXSTAT_TX_OK) 1206 ifp->if_opackets++; 1207 else { 1208 int oldthresh; 1209 ifp->if_oerrors++; 1210 if ((txstat & RL_TXSTAT_TXABRT) || 1211 (txstat & RL_TXSTAT_OUTOFWIN)) 1212 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG); 1213 oldthresh = sc->rl_txthresh; 1214 /* error recovery */ 1215 rl_reset(sc); 1216 rl_init(sc); 1217 /* 1218 * If there was a transmit underrun, 1219 * bump the TX threshold. 1220 */ 1221 if (txstat & RL_TXSTAT_TX_UNDERRUN) 1222 sc->rl_txthresh = oldthresh + 32; 1223 return; 1224 } 1225 RL_INC(sc->rl_cdata.last_tx); 1226 ifp->if_flags &= ~IFF_OACTIVE; 1227 } while (sc->rl_cdata.last_tx != sc->rl_cdata.cur_tx); 1228 1229 return; 1230} 1231 1232static void rl_tick(xsc) 1233 void *xsc; 1234{ 1235 struct rl_softc *sc; 1236 struct mii_data *mii; 1237 int s; 1238 1239 s = splimp(); 1240 1241 sc = xsc; 1242 mii = device_get_softc(sc->rl_miibus); 1243 1244 mii_tick(mii); 1245 1246 splx(s); 1247 1248 sc->rl_stat_ch = timeout(rl_tick, sc, hz); 1249 1250 return; 1251} 1252 1253static void rl_intr(arg) 1254 void *arg; 1255{ 1256 struct rl_softc *sc; 1257 struct ifnet *ifp; 1258 u_int16_t status; 1259 1260 sc = arg; 1261 ifp = &sc->arpcom.ac_if; 1262 1263 /* Disable interrupts. */ 1264 CSR_WRITE_2(sc, RL_IMR, 0x0000); 1265 1266 for (;;) { 1267 1268 status = CSR_READ_2(sc, RL_ISR); 1269 if (status) 1270 CSR_WRITE_2(sc, RL_ISR, status); 1271 1272 if ((status & RL_INTRS) == 0) 1273 break; 1274 1275 if (status & RL_ISR_RX_OK) 1276 rl_rxeof(sc); 1277 1278 if (status & RL_ISR_RX_ERR) 1279 rl_rxeof(sc); 1280 1281 if ((status & RL_ISR_TX_OK) || (status & RL_ISR_TX_ERR)) 1282 rl_txeof(sc); 1283 1284 if (status & RL_ISR_SYSTEM_ERR) { 1285 rl_reset(sc); 1286 rl_init(sc); 1287 } 1288 1289 } 1290 1291 /* Re-enable interrupts. */ 1292 CSR_WRITE_2(sc, RL_IMR, RL_INTRS); 1293 1294 if (ifp->if_snd.ifq_head != NULL) 1295 rl_start(ifp); 1296 1297 return; 1298} 1299 1300/* 1301 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 1302 * pointers to the fragment pointers. 1303 */ 1304static int rl_encap(sc, m_head) 1305 struct rl_softc *sc; 1306 struct mbuf *m_head; 1307{ 1308 struct mbuf *m_new = NULL; 1309 1310 /* 1311 * The RealTek is brain damaged and wants longword-aligned 1312 * TX buffers, plus we can only have one fragment buffer 1313 * per packet. We have to copy pretty much all the time. 1314 */ 1315 1316 MGETHDR(m_new, M_DONTWAIT, MT_DATA); 1317 if (m_new == NULL) { 1318 printf("rl%d: no memory for tx list", sc->rl_unit); 1319 return(1); 1320 } 1321 if (m_head->m_pkthdr.len > MHLEN) { 1322 MCLGET(m_new, M_DONTWAIT); 1323 if (!(m_new->m_flags & M_EXT)) { 1324 m_freem(m_new); 1325 printf("rl%d: no memory for tx list", 1326 sc->rl_unit); 1327 return(1); 1328 } 1329 } 1330 m_copydata(m_head, 0, m_head->m_pkthdr.len, mtod(m_new, caddr_t)); 1331 m_new->m_pkthdr.len = m_new->m_len = m_head->m_pkthdr.len; 1332 m_freem(m_head); 1333 m_head = m_new; 1334 1335 /* Pad frames to at least 60 bytes. */ 1336 if (m_head->m_pkthdr.len < RL_MIN_FRAMELEN) { 1337 /* 1338 * Make security concious people happy: zero out the 1339 * bytes in the pad area, since we don't know what 1340 * this mbuf cluster buffer's previous user might 1341 * have left in it. 1342 */ 1343 bzero(mtod(m_head, char *) + m_head->m_pkthdr.len, 1344 RL_MIN_FRAMELEN - m_head->m_pkthdr.len); 1345 m_head->m_pkthdr.len += 1346 (RL_MIN_FRAMELEN - m_head->m_pkthdr.len); 1347 m_head->m_len = m_head->m_pkthdr.len; 1348 } 1349 1350 RL_CUR_TXMBUF(sc) = m_head; 1351 1352 return(0); 1353} 1354 1355/* 1356 * Main transmit routine. 1357 */ 1358 1359static void rl_start(ifp) 1360 struct ifnet *ifp; 1361{ 1362 struct rl_softc *sc; 1363 struct mbuf *m_head = NULL; 1364 1365 sc = ifp->if_softc; 1366 1367 while(RL_CUR_TXMBUF(sc) == NULL) { 1368 IF_DEQUEUE(&ifp->if_snd, m_head); 1369 if (m_head == NULL) 1370 break; 1371 1372 if (rl_encap(sc, m_head)) { 1373 IF_PREPEND(&ifp->if_snd, m_head); 1374 ifp->if_flags |= IFF_OACTIVE; 1375 break; 1376 } 1377 1378 /* 1379 * If there's a BPF listener, bounce a copy of this frame 1380 * to him. 1381 */ 1382 if (ifp->if_bpf) 1383 bpf_mtap(ifp, RL_CUR_TXMBUF(sc)); 1384 1385 /* 1386 * Transmit the frame. 1387 */ 1388 CSR_WRITE_4(sc, RL_CUR_TXADDR(sc), 1389 vtophys(mtod(RL_CUR_TXMBUF(sc), caddr_t))); 1390 CSR_WRITE_4(sc, RL_CUR_TXSTAT(sc), 1391 RL_TXTHRESH(sc->rl_txthresh) | 1392 RL_CUR_TXMBUF(sc)->m_pkthdr.len); 1393 1394 RL_INC(sc->rl_cdata.cur_tx); 1395 } 1396 1397 /* 1398 * We broke out of the loop because all our TX slots are 1399 * full. Mark the NIC as busy until it drains some of the 1400 * packets from the queue. 1401 */ 1402 if (RL_CUR_TXMBUF(sc) != NULL) 1403 ifp->if_flags |= IFF_OACTIVE; 1404 1405 /* 1406 * Set a timeout in case the chip goes out to lunch. 1407 */ 1408 ifp->if_timer = 5; 1409 1410 return; 1411} 1412 1413static void rl_init(xsc) 1414 void *xsc; 1415{ 1416 struct rl_softc *sc = xsc; 1417 struct ifnet *ifp = &sc->arpcom.ac_if; 1418 struct mii_data *mii; 1419 int s, i; 1420 u_int32_t rxcfg = 0; 1421 1422 s = splimp(); 1423 1424 mii = device_get_softc(sc->rl_miibus); 1425 1426 /* 1427 * Cancel pending I/O and free all RX/TX buffers. 1428 */ 1429 rl_stop(sc); 1430 1431 /* Init our MAC address */ 1432 for (i = 0; i < ETHER_ADDR_LEN; i++) { 1433 CSR_WRITE_1(sc, RL_IDR0 + i, sc->arpcom.ac_enaddr[i]); 1434 } 1435 1436 /* Init the RX buffer pointer register. */ 1437 CSR_WRITE_4(sc, RL_RXADDR, vtophys(sc->rl_cdata.rl_rx_buf)); 1438 1439 /* Init TX descriptors. */ 1440 rl_list_tx_init(sc); 1441 1442 /* 1443 * Enable transmit and receive. 1444 */ 1445 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB); 1446 1447 /* 1448 * Set the initial TX and RX configuration. 1449 */ 1450 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG); 1451 CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG); 1452 1453 /* Set the individual bit to receive frames for this host only. */ 1454 rxcfg = CSR_READ_4(sc, RL_RXCFG); 1455 rxcfg |= RL_RXCFG_RX_INDIV; 1456 1457 /* If we want promiscuous mode, set the allframes bit. */ 1458 if (ifp->if_flags & IFF_PROMISC) { 1459 rxcfg |= RL_RXCFG_RX_ALLPHYS; 1460 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 1461 } else { 1462 rxcfg &= ~RL_RXCFG_RX_ALLPHYS; 1463 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 1464 } 1465 1466 /* 1467 * Set capture broadcast bit to capture broadcast frames. 1468 */ 1469 if (ifp->if_flags & IFF_BROADCAST) { 1470 rxcfg |= RL_RXCFG_RX_BROAD; 1471 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 1472 } else { 1473 rxcfg &= ~RL_RXCFG_RX_BROAD; 1474 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 1475 } 1476 1477 /* 1478 * Program the multicast filter, if necessary. 1479 */ 1480 rl_setmulti(sc); 1481 1482 /* 1483 * Enable interrupts. 1484 */ 1485 CSR_WRITE_2(sc, RL_IMR, RL_INTRS); 1486 1487 /* Set initial TX threshold */ 1488 sc->rl_txthresh = RL_TX_THRESH_INIT; 1489 1490 /* Start RX/TX process. */ 1491 CSR_WRITE_4(sc, RL_MISSEDPKT, 0); 1492 1493 /* Enable receiver and transmitter. */ 1494 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB); 1495 1496 mii_mediachg(mii); 1497 1498 CSR_WRITE_1(sc, RL_CFG1, RL_CFG1_DRVLOAD|RL_CFG1_FULLDUPLEX); 1499 1500 ifp->if_flags |= IFF_RUNNING; 1501 ifp->if_flags &= ~IFF_OACTIVE; 1502 1503 (void)splx(s); 1504 1505 sc->rl_stat_ch = timeout(rl_tick, sc, hz); 1506 1507 return; 1508} 1509 1510/* 1511 * Set media options. 1512 */ 1513static int rl_ifmedia_upd(ifp) 1514 struct ifnet *ifp; 1515{ 1516 struct rl_softc *sc; 1517 struct mii_data *mii; 1518 1519 sc = ifp->if_softc; 1520 mii = device_get_softc(sc->rl_miibus); 1521 mii_mediachg(mii); 1522 1523 return(0); 1524} 1525 1526/* 1527 * Report current media status. 1528 */ 1529static void rl_ifmedia_sts(ifp, ifmr) 1530 struct ifnet *ifp; 1531 struct ifmediareq *ifmr; 1532{ 1533 struct rl_softc *sc; 1534 struct mii_data *mii; 1535 1536 sc = ifp->if_softc; 1537 mii = device_get_softc(sc->rl_miibus); 1538 1539 mii_pollstat(mii); 1540 ifmr->ifm_active = mii->mii_media_active; 1541 ifmr->ifm_status = mii->mii_media_status; 1542 1543 return; 1544} 1545 1546static int rl_ioctl(ifp, command, data) 1547 struct ifnet *ifp; 1548 u_long command; 1549 caddr_t data; 1550{ 1551 struct rl_softc *sc = ifp->if_softc; 1552 struct ifreq *ifr = (struct ifreq *) data; 1553 struct mii_data *mii; 1554 int s, error = 0; 1555 1556 s = splimp(); 1557 1558 switch(command) { 1559 case SIOCSIFADDR: 1560 case SIOCGIFADDR: 1561 case SIOCSIFMTU: 1562 error = ether_ioctl(ifp, command, data); 1563 break; 1564 case SIOCSIFFLAGS: 1565 if (ifp->if_flags & IFF_UP) { 1566 rl_init(sc); 1567 } else { 1568 if (ifp->if_flags & IFF_RUNNING) 1569 rl_stop(sc); 1570 } 1571 error = 0; 1572 break; 1573 case SIOCADDMULTI: 1574 case SIOCDELMULTI: 1575 rl_setmulti(sc); 1576 error = 0; 1577 break; 1578 case SIOCGIFMEDIA: 1579 case SIOCSIFMEDIA: 1580 mii = device_get_softc(sc->rl_miibus); 1581 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 1582 break; 1583 default: 1584 error = EINVAL; 1585 break; 1586 } 1587 1588 (void)splx(s); 1589 1590 return(error); 1591} 1592 1593static void rl_watchdog(ifp) 1594 struct ifnet *ifp; 1595{ 1596 struct rl_softc *sc; 1597 1598 sc = ifp->if_softc; 1599 1600 printf("rl%d: watchdog timeout\n", sc->rl_unit); 1601 ifp->if_oerrors++; 1602 1603 rl_txeof(sc); 1604 rl_rxeof(sc); 1605 rl_init(sc); 1606 1607 return; 1608} 1609 1610/* 1611 * Stop the adapter and free any mbufs allocated to the 1612 * RX and TX lists. 1613 */ 1614static void rl_stop(sc) 1615 struct rl_softc *sc; 1616{ 1617 register int i; 1618 struct ifnet *ifp; 1619 1620 ifp = &sc->arpcom.ac_if; 1621 ifp->if_timer = 0; 1622 1623 untimeout(rl_tick, sc, sc->rl_stat_ch); 1624 1625 CSR_WRITE_1(sc, RL_COMMAND, 0x00); 1626 CSR_WRITE_2(sc, RL_IMR, 0x0000); 1627 1628 /* 1629 * Free the TX list buffers. 1630 */ 1631 for (i = 0; i < RL_TX_LIST_CNT; i++) { 1632 if (sc->rl_cdata.rl_tx_chain[i] != NULL) { 1633 m_freem(sc->rl_cdata.rl_tx_chain[i]); 1634 sc->rl_cdata.rl_tx_chain[i] = NULL; 1635 CSR_WRITE_4(sc, RL_TXADDR0 + i, 0x0000000); 1636 } 1637 } 1638 1639 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1640 1641 return; 1642} 1643 1644/* 1645 * Stop all chip I/O so that the kernel's probe routines don't 1646 * get confused by errant DMAs when rebooting. 1647 */ 1648static void rl_shutdown(dev) 1649 device_t dev; 1650{ 1651 struct rl_softc *sc; 1652 1653 sc = device_get_softc(dev); 1654 1655 rl_stop(sc); 1656 1657 return; 1658} 1659