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_rl.c,v 1.38.2.16 2003/03/05 18:42:33 njl Exp $ 33 * $DragonFly: src/sys/dev/netif/rl/if_rl.c,v 1.7 2004/01/06 01:40:48 dillon Exp $ 34 * 35 * $FreeBSD: src/sys/pci/if_rl.c,v 1.38.2.16 2003/03/05 18:42:33 njl Exp $ 36 */ 37 38 /* 39 * RealTek 8129/8139 PCI NIC driver 40 * 41 * Supports several extremely cheap PCI 10/100 adapters based on 42 * the RealTek chipset. Datasheets can be obtained from 43 * www.realtek.com.tw. 44 * 45 * Written by Bill Paul <wpaul@ctr.columbia.edu> 46 * Electrical Engineering Department 47 * Columbia University, New York City 48 */ 49 50 /* 51 * The RealTek 8139 PCI NIC redefines the meaning of 'low end.' This is 52 * probably the worst PCI ethernet controller ever made, with the possible 53 * exception of the FEAST chip made by SMC. The 8139 supports bus-master 54 * DMA, but it has a terrible interface that nullifies any performance 55 * gains that bus-master DMA usually offers. 56 * 57 * For transmission, the chip offers a series of four TX descriptor 58 * registers. Each transmit frame must be in a contiguous buffer, aligned 59 * on a longword (32-bit) boundary. This means we almost always have to 60 * do mbuf copies in order to transmit a frame, except in the unlikely 61 * case where a) the packet fits into a single mbuf, and b) the packet 62 * is 32-bit aligned within the mbuf's data area. The presence of only 63 * four descriptor registers means that we can never have more than four 64 * packets queued for transmission at any one time. 65 * 66 * Reception is not much better. The driver has to allocate a single large 67 * buffer area (up to 64K in size) into which the chip will DMA received 68 * frames. Because we don't know where within this region received packets 69 * will begin or end, we have no choice but to copy data from the buffer 70 * area into mbufs in order to pass the packets up to the higher protocol 71 * levels. 72 * 73 * It's impossible given this rotten design to really achieve decent 74 * performance at 100Mbps, unless you happen to have a 400Mhz PII or 75 * some equally overmuscled CPU to drive it. 76 * 77 * On the bright side, the 8139 does have a built-in PHY, although 78 * rather than using an MDIO serial interface like most other NICs, the 79 * PHY registers are directly accessible through the 8139's register 80 * space. The 8139 supports autonegotiation, as well as a 64-bit multicast 81 * filter. 82 * 83 * The 8129 chip is an older version of the 8139 that uses an external PHY 84 * chip. The 8129 has a serial MDIO interface for accessing the MII where 85 * the 8139 lets you directly access the on-board PHY registers. We need 86 * to select which interface to use depending on the chip type. 87 */ 88 89 #include <sys/param.h> 90 #include <sys/systm.h> 91 #include <sys/sockio.h> 92 #include <sys/mbuf.h> 93 #include <sys/malloc.h> 94 #include <sys/kernel.h> 95 #include <sys/socket.h> 96 97 #include <net/if.h> 98 #include <net/if_arp.h> 99 #include <net/ethernet.h> 100 #include <net/if_dl.h> 101 #include <net/if_media.h> 102 103 #include <net/bpf.h> 104 105 #include <vm/vm.h> /* for vtophys */ 106 #include <vm/pmap.h> /* for vtophys */ 107 #include <machine/clock.h> /* for DELAY */ 108 #include <machine/bus_pio.h> 109 #include <machine/bus_memio.h> 110 #include <machine/bus.h> 111 #include <machine/resource.h> 112 #include <sys/bus.h> 113 #include <sys/rman.h> 114 115 #include "../mii_layer/mii.h" 116 #include "../mii_layer/miivar.h" 117 118 #include <bus/pci/pcireg.h> 119 #include <bus/pci/pcivar.h> 120 121 /* "controller miibus0" required. See GENERIC if you get errors here. */ 122 #include "miibus_if.h" 123 124 /* 125 * Default to using PIO access for this driver. On SMP systems, 126 * there appear to be problems with memory mapped mode: it looks like 127 * doing too many memory mapped access back to back in rapid succession 128 * can hang the bus. I'm inclined to blame this on crummy design/construction 129 * on the part of RealTek. Memory mapped mode does appear to work on 130 * uniprocessor systems though. 131 */ 132 #define RL_USEIOSPACE 133 134 #include "if_rlreg.h" 135 136 /* 137 * Various supported device vendors/types and their names. 138 */ 139 static struct rl_type rl_devs[] = { 140 { RT_VENDORID, RT_DEVICEID_8129, 141 "RealTek 8129 10/100BaseTX" }, 142 { RT_VENDORID, RT_DEVICEID_8139, 143 "RealTek 8139 10/100BaseTX" }, 144 { ACCTON_VENDORID, ACCTON_DEVICEID_5030, 145 "Accton MPX 5030/5038 10/100BaseTX" }, 146 { DELTA_VENDORID, DELTA_DEVICEID_8139, 147 "Delta Electronics 8139 10/100BaseTX" }, 148 { ADDTRON_VENDORID, ADDTRON_DEVICEID_8139, 149 "Addtron Technolgy 8139 10/100BaseTX" }, 150 { DLINK_VENDORID, DLINK_DEVICEID_530TXPLUS, 151 "D-Link DFE-530TX+ 10/100BaseTX" }, 152 { NORTEL_VENDORID, ACCTON_DEVICEID_5030, 153 "Nortel Networks 10/100BaseTX" }, 154 { PEPPERCON_VENDORID, PEPPERCON_DEVICEID_ROLF, 155 "Peppercon AG ROL/F" }, 156 { 0, 0, NULL } 157 }; 158 159 static int rl_probe (device_t); 160 static int rl_attach (device_t); 161 static int rl_detach (device_t); 162 163 static int rl_encap (struct rl_softc *, struct mbuf * ); 164 165 static void rl_rxeof (struct rl_softc *); 166 static void rl_txeof (struct rl_softc *); 167 static void rl_intr (void *); 168 static void rl_tick (void *); 169 static void rl_start (struct ifnet *); 170 static int rl_ioctl (struct ifnet *, u_long, caddr_t); 171 static void rl_init (void *); 172 static void rl_stop (struct rl_softc *); 173 static void rl_watchdog (struct ifnet *); 174 static int rl_suspend (device_t); 175 static int rl_resume (device_t); 176 static void rl_shutdown (device_t); 177 static int rl_ifmedia_upd (struct ifnet *); 178 static void rl_ifmedia_sts (struct ifnet *, struct ifmediareq *); 179 180 static void rl_eeprom_putbyte (struct rl_softc *, int); 181 static void rl_eeprom_getword (struct rl_softc *, int, u_int16_t *); 182 static void rl_read_eeprom (struct rl_softc *, caddr_t, 183 int, int, int); 184 static void rl_mii_sync (struct rl_softc *); 185 static void rl_mii_send (struct rl_softc *, u_int32_t, int); 186 static int rl_mii_readreg (struct rl_softc *, struct rl_mii_frame *); 187 static int rl_mii_writereg (struct rl_softc *, struct rl_mii_frame *); 188 189 static int rl_miibus_readreg (device_t, int, int); 190 static int rl_miibus_writereg (device_t, int, int, int); 191 static void rl_miibus_statchg (device_t); 192 193 static u_int8_t rl_calchash (caddr_t); 194 static void rl_setmulti (struct rl_softc *); 195 static void rl_reset (struct rl_softc *); 196 static int rl_list_tx_init (struct rl_softc *); 197 198 #ifdef RL_USEIOSPACE 199 #define RL_RES SYS_RES_IOPORT 200 #define RL_RID RL_PCI_LOIO 201 #else 202 #define RL_RES SYS_RES_MEMORY 203 #define RL_RID RL_PCI_LOMEM 204 #endif 205 206 static device_method_t rl_methods[] = { 207 /* Device interface */ 208 DEVMETHOD(device_probe, rl_probe), 209 DEVMETHOD(device_attach, rl_attach), 210 DEVMETHOD(device_detach, rl_detach), 211 DEVMETHOD(device_suspend, rl_suspend), 212 DEVMETHOD(device_resume, rl_resume), 213 DEVMETHOD(device_shutdown, rl_shutdown), 214 215 /* bus interface */ 216 DEVMETHOD(bus_print_child, bus_generic_print_child), 217 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 218 219 /* MII interface */ 220 DEVMETHOD(miibus_readreg, rl_miibus_readreg), 221 DEVMETHOD(miibus_writereg, rl_miibus_writereg), 222 DEVMETHOD(miibus_statchg, rl_miibus_statchg), 223 224 { 0, 0 } 225 }; 226 227 static driver_t rl_driver = { 228 "rl", 229 rl_methods, 230 sizeof(struct rl_softc) 231 }; 232 233 static devclass_t rl_devclass; 234 235 DECLARE_DUMMY_MODULE(if_rl); 236 DRIVER_MODULE(if_rl, pci, rl_driver, rl_devclass, 0, 0); 237 DRIVER_MODULE(miibus, rl, miibus_driver, miibus_devclass, 0, 0); 238 239 #define EE_SET(x) \ 240 CSR_WRITE_1(sc, RL_EECMD, \ 241 CSR_READ_1(sc, RL_EECMD) | x) 242 243 #define EE_CLR(x) \ 244 CSR_WRITE_1(sc, RL_EECMD, \ 245 CSR_READ_1(sc, RL_EECMD) & ~x) 246 247 /* 248 * Send a read command and address to the EEPROM, check for ACK. 249 */ 250 static void rl_eeprom_putbyte(sc, addr) 251 struct rl_softc *sc; 252 int addr; 253 { 254 int d, i; 255 256 d = addr | RL_EECMD_READ; 257 258 /* 259 * Feed in each bit and strobe the clock. 260 */ 261 for (i = 0x400; i; i >>= 1) { 262 if (d & i) { 263 EE_SET(RL_EE_DATAIN); 264 } else { 265 EE_CLR(RL_EE_DATAIN); 266 } 267 DELAY(100); 268 EE_SET(RL_EE_CLK); 269 DELAY(150); 270 EE_CLR(RL_EE_CLK); 271 DELAY(100); 272 } 273 274 return; 275 } 276 277 /* 278 * Read a word of data stored in the EEPROM at address 'addr.' 279 */ 280 static void rl_eeprom_getword(sc, addr, dest) 281 struct rl_softc *sc; 282 int addr; 283 u_int16_t *dest; 284 { 285 int i; 286 u_int16_t word = 0; 287 288 /* Enter EEPROM access mode. */ 289 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL); 290 291 /* 292 * Send address of word we want to read. 293 */ 294 rl_eeprom_putbyte(sc, addr); 295 296 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL); 297 298 /* 299 * Start reading bits from EEPROM. 300 */ 301 for (i = 0x8000; i; i >>= 1) { 302 EE_SET(RL_EE_CLK); 303 DELAY(100); 304 if (CSR_READ_1(sc, RL_EECMD) & RL_EE_DATAOUT) 305 word |= i; 306 EE_CLR(RL_EE_CLK); 307 DELAY(100); 308 } 309 310 /* Turn off EEPROM access mode. */ 311 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF); 312 313 *dest = word; 314 315 return; 316 } 317 318 /* 319 * Read a sequence of words from the EEPROM. 320 */ 321 static void rl_read_eeprom(sc, dest, off, cnt, swap) 322 struct rl_softc *sc; 323 caddr_t dest; 324 int off; 325 int cnt; 326 int swap; 327 { 328 int i; 329 u_int16_t word = 0, *ptr; 330 331 for (i = 0; i < cnt; i++) { 332 rl_eeprom_getword(sc, off + i, &word); 333 ptr = (u_int16_t *)(dest + (i * 2)); 334 if (swap) 335 *ptr = ntohs(word); 336 else 337 *ptr = word; 338 } 339 340 return; 341 } 342 343 344 /* 345 * MII access routines are provided for the 8129, which 346 * doesn't have a built-in PHY. For the 8139, we fake things 347 * up by diverting rl_phy_readreg()/rl_phy_writereg() to the 348 * direct access PHY registers. 349 */ 350 #define MII_SET(x) \ 351 CSR_WRITE_1(sc, RL_MII, \ 352 CSR_READ_1(sc, RL_MII) | x) 353 354 #define MII_CLR(x) \ 355 CSR_WRITE_1(sc, RL_MII, \ 356 CSR_READ_1(sc, RL_MII) & ~x) 357 358 /* 359 * Sync the PHYs by setting data bit and strobing the clock 32 times. 360 */ 361 static void rl_mii_sync(sc) 362 struct rl_softc *sc; 363 { 364 int i; 365 366 MII_SET(RL_MII_DIR|RL_MII_DATAOUT); 367 368 for (i = 0; i < 32; i++) { 369 MII_SET(RL_MII_CLK); 370 DELAY(1); 371 MII_CLR(RL_MII_CLK); 372 DELAY(1); 373 } 374 375 return; 376 } 377 378 /* 379 * Clock a series of bits through the MII. 380 */ 381 static void rl_mii_send(sc, bits, cnt) 382 struct rl_softc *sc; 383 u_int32_t bits; 384 int cnt; 385 { 386 int i; 387 388 MII_CLR(RL_MII_CLK); 389 390 for (i = (0x1 << (cnt - 1)); i; i >>= 1) { 391 if (bits & i) { 392 MII_SET(RL_MII_DATAOUT); 393 } else { 394 MII_CLR(RL_MII_DATAOUT); 395 } 396 DELAY(1); 397 MII_CLR(RL_MII_CLK); 398 DELAY(1); 399 MII_SET(RL_MII_CLK); 400 } 401 } 402 403 /* 404 * Read an PHY register through the MII. 405 */ 406 static int rl_mii_readreg(sc, frame) 407 struct rl_softc *sc; 408 struct rl_mii_frame *frame; 409 410 { 411 int i, ack, s; 412 413 s = splimp(); 414 415 /* 416 * Set up frame for RX. 417 */ 418 frame->mii_stdelim = RL_MII_STARTDELIM; 419 frame->mii_opcode = RL_MII_READOP; 420 frame->mii_turnaround = 0; 421 frame->mii_data = 0; 422 423 CSR_WRITE_2(sc, RL_MII, 0); 424 425 /* 426 * Turn on data xmit. 427 */ 428 MII_SET(RL_MII_DIR); 429 430 rl_mii_sync(sc); 431 432 /* 433 * Send command/address info. 434 */ 435 rl_mii_send(sc, frame->mii_stdelim, 2); 436 rl_mii_send(sc, frame->mii_opcode, 2); 437 rl_mii_send(sc, frame->mii_phyaddr, 5); 438 rl_mii_send(sc, frame->mii_regaddr, 5); 439 440 /* Idle bit */ 441 MII_CLR((RL_MII_CLK|RL_MII_DATAOUT)); 442 DELAY(1); 443 MII_SET(RL_MII_CLK); 444 DELAY(1); 445 446 /* Turn off xmit. */ 447 MII_CLR(RL_MII_DIR); 448 449 /* Check for ack */ 450 MII_CLR(RL_MII_CLK); 451 DELAY(1); 452 ack = CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN; 453 MII_SET(RL_MII_CLK); 454 DELAY(1); 455 456 /* 457 * Now try reading data bits. If the ack failed, we still 458 * need to clock through 16 cycles to keep the PHY(s) in sync. 459 */ 460 if (ack) { 461 for(i = 0; i < 16; i++) { 462 MII_CLR(RL_MII_CLK); 463 DELAY(1); 464 MII_SET(RL_MII_CLK); 465 DELAY(1); 466 } 467 goto fail; 468 } 469 470 for (i = 0x8000; i; i >>= 1) { 471 MII_CLR(RL_MII_CLK); 472 DELAY(1); 473 if (!ack) { 474 if (CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN) 475 frame->mii_data |= i; 476 DELAY(1); 477 } 478 MII_SET(RL_MII_CLK); 479 DELAY(1); 480 } 481 482 fail: 483 484 MII_CLR(RL_MII_CLK); 485 DELAY(1); 486 MII_SET(RL_MII_CLK); 487 DELAY(1); 488 489 splx(s); 490 491 if (ack) 492 return(1); 493 return(0); 494 } 495 496 /* 497 * Write to a PHY register through the MII. 498 */ 499 static int rl_mii_writereg(sc, frame) 500 struct rl_softc *sc; 501 struct rl_mii_frame *frame; 502 503 { 504 int s; 505 506 s = splimp(); 507 /* 508 * Set up frame for TX. 509 */ 510 511 frame->mii_stdelim = RL_MII_STARTDELIM; 512 frame->mii_opcode = RL_MII_WRITEOP; 513 frame->mii_turnaround = RL_MII_TURNAROUND; 514 515 /* 516 * Turn on data output. 517 */ 518 MII_SET(RL_MII_DIR); 519 520 rl_mii_sync(sc); 521 522 rl_mii_send(sc, frame->mii_stdelim, 2); 523 rl_mii_send(sc, frame->mii_opcode, 2); 524 rl_mii_send(sc, frame->mii_phyaddr, 5); 525 rl_mii_send(sc, frame->mii_regaddr, 5); 526 rl_mii_send(sc, frame->mii_turnaround, 2); 527 rl_mii_send(sc, frame->mii_data, 16); 528 529 /* Idle bit. */ 530 MII_SET(RL_MII_CLK); 531 DELAY(1); 532 MII_CLR(RL_MII_CLK); 533 DELAY(1); 534 535 /* 536 * Turn off xmit. 537 */ 538 MII_CLR(RL_MII_DIR); 539 540 splx(s); 541 542 return(0); 543 } 544 545 static int rl_miibus_readreg(dev, phy, reg) 546 device_t dev; 547 int phy, reg; 548 { 549 struct rl_softc *sc; 550 struct rl_mii_frame frame; 551 u_int16_t rval = 0; 552 u_int16_t rl8139_reg = 0; 553 554 sc = device_get_softc(dev); 555 556 if (sc->rl_type == RL_8139) { 557 /* Pretend the internal PHY is only at address 0 */ 558 if (phy) 559 return(0); 560 switch(reg) { 561 case MII_BMCR: 562 rl8139_reg = RL_BMCR; 563 break; 564 case MII_BMSR: 565 rl8139_reg = RL_BMSR; 566 break; 567 case MII_ANAR: 568 rl8139_reg = RL_ANAR; 569 break; 570 case MII_ANER: 571 rl8139_reg = RL_ANER; 572 break; 573 case MII_ANLPAR: 574 rl8139_reg = RL_LPAR; 575 break; 576 case MII_PHYIDR1: 577 case MII_PHYIDR2: 578 return(0); 579 break; 580 /* 581 * Allow the rlphy driver to read the media status 582 * register. If we have a link partner which does not 583 * support NWAY, this is the register which will tell 584 * us the results of parallel detection. 585 */ 586 case RL_MEDIASTAT: 587 rval = CSR_READ_1(sc, RL_MEDIASTAT); 588 return(rval); 589 break; 590 default: 591 printf("rl%d: bad phy register\n", sc->rl_unit); 592 return(0); 593 } 594 rval = CSR_READ_2(sc, rl8139_reg); 595 return(rval); 596 } 597 598 bzero((char *)&frame, sizeof(frame)); 599 600 frame.mii_phyaddr = phy; 601 frame.mii_regaddr = reg; 602 rl_mii_readreg(sc, &frame); 603 604 return(frame.mii_data); 605 } 606 607 static int rl_miibus_writereg(dev, phy, reg, data) 608 device_t dev; 609 int phy, reg, data; 610 { 611 struct rl_softc *sc; 612 struct rl_mii_frame frame; 613 u_int16_t rl8139_reg = 0; 614 615 sc = device_get_softc(dev); 616 617 if (sc->rl_type == RL_8139) { 618 /* Pretend the internal PHY is only at address 0 */ 619 if (phy) 620 return(0); 621 switch(reg) { 622 case MII_BMCR: 623 rl8139_reg = RL_BMCR; 624 break; 625 case MII_BMSR: 626 rl8139_reg = RL_BMSR; 627 break; 628 case MII_ANAR: 629 rl8139_reg = RL_ANAR; 630 break; 631 case MII_ANER: 632 rl8139_reg = RL_ANER; 633 break; 634 case MII_ANLPAR: 635 rl8139_reg = RL_LPAR; 636 break; 637 case MII_PHYIDR1: 638 case MII_PHYIDR2: 639 return(0); 640 break; 641 default: 642 printf("rl%d: bad phy register\n", sc->rl_unit); 643 return(0); 644 } 645 CSR_WRITE_2(sc, rl8139_reg, data); 646 return(0); 647 } 648 649 bzero((char *)&frame, sizeof(frame)); 650 651 frame.mii_phyaddr = phy; 652 frame.mii_regaddr = reg; 653 frame.mii_data = data; 654 655 rl_mii_writereg(sc, &frame); 656 657 return(0); 658 } 659 660 static void rl_miibus_statchg(dev) 661 device_t dev; 662 { 663 return; 664 } 665 666 /* 667 * Calculate CRC of a multicast group address, return the upper 6 bits. 668 */ 669 static u_int8_t rl_calchash(addr) 670 caddr_t addr; 671 { 672 u_int32_t crc, carry; 673 int i, j; 674 u_int8_t c; 675 676 /* Compute CRC for the address value. */ 677 crc = 0xFFFFFFFF; /* initial value */ 678 679 for (i = 0; i < 6; i++) { 680 c = *(addr + i); 681 for (j = 0; j < 8; j++) { 682 carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01); 683 crc <<= 1; 684 c >>= 1; 685 if (carry) 686 crc = (crc ^ 0x04c11db6) | carry; 687 } 688 } 689 690 /* return the filter bit position */ 691 return(crc >> 26); 692 } 693 694 /* 695 * Program the 64-bit multicast hash filter. 696 */ 697 static void rl_setmulti(sc) 698 struct rl_softc *sc; 699 { 700 struct ifnet *ifp; 701 int h = 0; 702 u_int32_t hashes[2] = { 0, 0 }; 703 struct ifmultiaddr *ifma; 704 u_int32_t rxfilt; 705 int mcnt = 0; 706 707 ifp = &sc->arpcom.ac_if; 708 709 rxfilt = CSR_READ_4(sc, RL_RXCFG); 710 711 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { 712 rxfilt |= RL_RXCFG_RX_MULTI; 713 CSR_WRITE_4(sc, RL_RXCFG, rxfilt); 714 CSR_WRITE_4(sc, RL_MAR0, 0xFFFFFFFF); 715 CSR_WRITE_4(sc, RL_MAR4, 0xFFFFFFFF); 716 return; 717 } 718 719 /* first, zot all the existing hash bits */ 720 CSR_WRITE_4(sc, RL_MAR0, 0); 721 CSR_WRITE_4(sc, RL_MAR4, 0); 722 723 /* now program new ones */ 724 for (ifma = ifp->if_multiaddrs.lh_first; ifma != NULL; 725 ifma = ifma->ifma_link.le_next) { 726 if (ifma->ifma_addr->sa_family != AF_LINK) 727 continue; 728 h = rl_calchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); 729 if (h < 32) 730 hashes[0] |= (1 << h); 731 else 732 hashes[1] |= (1 << (h - 32)); 733 mcnt++; 734 } 735 736 if (mcnt) 737 rxfilt |= RL_RXCFG_RX_MULTI; 738 else 739 rxfilt &= ~RL_RXCFG_RX_MULTI; 740 741 CSR_WRITE_4(sc, RL_RXCFG, rxfilt); 742 CSR_WRITE_4(sc, RL_MAR0, hashes[0]); 743 CSR_WRITE_4(sc, RL_MAR4, hashes[1]); 744 745 return; 746 } 747 748 static void rl_reset(sc) 749 struct rl_softc *sc; 750 { 751 int i; 752 753 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_RESET); 754 755 for (i = 0; i < RL_TIMEOUT; i++) { 756 DELAY(10); 757 if (!(CSR_READ_1(sc, RL_COMMAND) & RL_CMD_RESET)) 758 break; 759 } 760 if (i == RL_TIMEOUT) 761 printf("rl%d: reset never completed!\n", sc->rl_unit); 762 763 return; 764 } 765 766 /* 767 * Probe for a RealTek 8129/8139 chip. Check the PCI vendor and device 768 * IDs against our list and return a device name if we find a match. 769 */ 770 static int rl_probe(dev) 771 device_t dev; 772 { 773 struct rl_type *t; 774 775 t = rl_devs; 776 777 while(t->rl_name != NULL) { 778 if ((pci_get_vendor(dev) == t->rl_vid) && 779 (pci_get_device(dev) == t->rl_did)) { 780 device_set_desc(dev, t->rl_name); 781 return(0); 782 } 783 t++; 784 } 785 786 return(ENXIO); 787 } 788 789 /* 790 * Attach the interface. Allocate softc structures, do ifmedia 791 * setup and ethernet/BPF attach. 792 */ 793 static int rl_attach(dev) 794 device_t dev; 795 { 796 int s; 797 u_char eaddr[ETHER_ADDR_LEN]; 798 u_int32_t command; 799 struct rl_softc *sc; 800 struct ifnet *ifp; 801 u_int16_t rl_did = 0; 802 int unit, error = 0, rid; 803 804 s = splimp(); 805 806 sc = device_get_softc(dev); 807 unit = device_get_unit(dev); 808 bzero(sc, sizeof(struct rl_softc)); 809 810 /* 811 * Handle power management nonsense. 812 */ 813 814 command = pci_read_config(dev, RL_PCI_CAPID, 4) & 0x000000FF; 815 if (command == 0x01) { 816 817 command = pci_read_config(dev, RL_PCI_PWRMGMTCTRL, 4); 818 if (command & RL_PSTATE_MASK) { 819 u_int32_t iobase, membase, irq; 820 821 /* Save important PCI config data. */ 822 iobase = pci_read_config(dev, RL_PCI_LOIO, 4); 823 membase = pci_read_config(dev, RL_PCI_LOMEM, 4); 824 irq = pci_read_config(dev, RL_PCI_INTLINE, 4); 825 826 /* Reset the power state. */ 827 printf("rl%d: chip is is in D%d power mode " 828 "-- setting to D0\n", unit, command & RL_PSTATE_MASK); 829 command &= 0xFFFFFFFC; 830 pci_write_config(dev, RL_PCI_PWRMGMTCTRL, command, 4); 831 832 /* Restore PCI config data. */ 833 pci_write_config(dev, RL_PCI_LOIO, iobase, 4); 834 pci_write_config(dev, RL_PCI_LOMEM, membase, 4); 835 pci_write_config(dev, RL_PCI_INTLINE, irq, 4); 836 } 837 } 838 839 /* 840 * Map control/status registers. 841 */ 842 command = pci_read_config(dev, PCIR_COMMAND, 4); 843 command |= (PCIM_CMD_PORTEN|PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN); 844 pci_write_config(dev, PCIR_COMMAND, command, 4); 845 command = pci_read_config(dev, PCIR_COMMAND, 4); 846 847 #ifdef RL_USEIOSPACE 848 if (!(command & PCIM_CMD_PORTEN)) { 849 printf("rl%d: failed to enable I/O ports!\n", unit); 850 error = ENXIO; 851 goto fail; 852 } 853 #else 854 if (!(command & PCIM_CMD_MEMEN)) { 855 printf("rl%d: failed to enable memory mapping!\n", unit); 856 error = ENXIO; 857 goto fail; 858 } 859 #endif 860 861 rid = RL_RID; 862 sc->rl_res = bus_alloc_resource(dev, RL_RES, &rid, 863 0, ~0, 1, RF_ACTIVE); 864 865 if (sc->rl_res == NULL) { 866 printf ("rl%d: couldn't map ports/memory\n", unit); 867 error = ENXIO; 868 goto fail; 869 } 870 871 sc->rl_btag = rman_get_bustag(sc->rl_res); 872 sc->rl_bhandle = rman_get_bushandle(sc->rl_res); 873 874 rid = 0; 875 sc->rl_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, 876 RF_SHAREABLE | RF_ACTIVE); 877 878 if (sc->rl_irq == NULL) { 879 printf("rl%d: couldn't map interrupt\n", unit); 880 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 881 error = ENXIO; 882 goto fail; 883 } 884 885 error = bus_setup_intr(dev, sc->rl_irq, INTR_TYPE_NET, 886 rl_intr, sc, &sc->rl_intrhand); 887 888 if (error) { 889 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq); 890 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 891 printf("rl%d: couldn't set up irq\n", unit); 892 goto fail; 893 } 894 895 callout_handle_init(&sc->rl_stat_ch); 896 897 /* Reset the adapter. */ 898 rl_reset(sc); 899 900 /* 901 * Get station address from the EEPROM. 902 */ 903 rl_read_eeprom(sc, (caddr_t)&eaddr, RL_EE_EADDR, 3, 0); 904 905 /* 906 * A RealTek chip was detected. Inform the world. 907 */ 908 printf("rl%d: Ethernet address: %6D\n", unit, eaddr, ":"); 909 910 sc->rl_unit = unit; 911 bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN); 912 913 /* 914 * Now read the exact device type from the EEPROM to find 915 * out if it's an 8129 or 8139. 916 */ 917 rl_read_eeprom(sc, (caddr_t)&rl_did, RL_EE_PCI_DID, 1, 0); 918 919 if (rl_did == RT_DEVICEID_8139 || rl_did == ACCTON_DEVICEID_5030 || 920 rl_did == DELTA_DEVICEID_8139 || rl_did == ADDTRON_DEVICEID_8139 || 921 rl_did == DLINK_DEVICEID_530TXPLUS) 922 sc->rl_type = RL_8139; 923 else if (rl_did == RT_DEVICEID_8129) 924 sc->rl_type = RL_8129; 925 else { 926 printf("rl%d: unknown device ID: %x\n", unit, rl_did); 927 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand); 928 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq); 929 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 930 error = ENXIO; 931 goto fail; 932 } 933 934 sc->rl_cdata.rl_rx_buf = contigmalloc(RL_RXBUFLEN + 1518, M_DEVBUF, 935 M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0); 936 937 if (sc->rl_cdata.rl_rx_buf == NULL) { 938 printf("rl%d: no memory for list buffers!\n", unit); 939 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand); 940 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq); 941 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 942 error = ENXIO; 943 goto fail; 944 } 945 946 /* Leave a few bytes before the start of the RX ring buffer. */ 947 sc->rl_cdata.rl_rx_buf_ptr = sc->rl_cdata.rl_rx_buf; 948 sc->rl_cdata.rl_rx_buf += sizeof(u_int64_t); 949 950 /* Do MII setup */ 951 if (mii_phy_probe(dev, &sc->rl_miibus, 952 rl_ifmedia_upd, rl_ifmedia_sts)) { 953 printf("rl%d: MII without any phy!\n", sc->rl_unit); 954 contigfree(sc->rl_cdata.rl_rx_buf, RL_RXBUFLEN + 1518, 955 M_DEVBUF); 956 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand); 957 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq); 958 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 959 free(sc->rl_cdata.rl_rx_buf, M_DEVBUF); 960 error = ENXIO; 961 goto fail; 962 } 963 964 ifp = &sc->arpcom.ac_if; 965 ifp->if_softc = sc; 966 if_initname(ifp, "rl", unit); 967 ifp->if_mtu = ETHERMTU; 968 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 969 ifp->if_ioctl = rl_ioctl; 970 ifp->if_output = ether_output; 971 ifp->if_start = rl_start; 972 ifp->if_watchdog = rl_watchdog; 973 ifp->if_init = rl_init; 974 ifp->if_baudrate = 10000000; 975 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 976 977 /* 978 * Call MI attach routine. 979 */ 980 ether_ifattach(ifp, ETHER_BPF_SUPPORTED); 981 982 fail: 983 splx(s); 984 return(error); 985 } 986 987 static int rl_detach(dev) 988 device_t dev; 989 { 990 struct rl_softc *sc; 991 struct ifnet *ifp; 992 int s; 993 994 s = splimp(); 995 996 sc = device_get_softc(dev); 997 ifp = &sc->arpcom.ac_if; 998 999 ether_ifdetach(ifp, ETHER_BPF_SUPPORTED); 1000 rl_stop(sc); 1001 1002 bus_generic_detach(dev); 1003 device_delete_child(dev, sc->rl_miibus); 1004 1005 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand); 1006 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq); 1007 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 1008 1009 contigfree(sc->rl_cdata.rl_rx_buf, RL_RXBUFLEN + 1518, M_DEVBUF); 1010 1011 splx(s); 1012 1013 return(0); 1014 } 1015 1016 /* 1017 * Initialize the transmit descriptors. 1018 */ 1019 static int rl_list_tx_init(sc) 1020 struct rl_softc *sc; 1021 { 1022 struct rl_chain_data *cd; 1023 int i; 1024 1025 cd = &sc->rl_cdata; 1026 for (i = 0; i < RL_TX_LIST_CNT; i++) { 1027 cd->rl_tx_chain[i] = NULL; 1028 CSR_WRITE_4(sc, 1029 RL_TXADDR0 + (i * sizeof(u_int32_t)), 0x0000000); 1030 } 1031 1032 sc->rl_cdata.cur_tx = 0; 1033 sc->rl_cdata.last_tx = 0; 1034 1035 return(0); 1036 } 1037 1038 /* 1039 * A frame has been uploaded: pass the resulting mbuf chain up to 1040 * the higher level protocols. 1041 * 1042 * You know there's something wrong with a PCI bus-master chip design 1043 * when you have to use m_devget(). 1044 * 1045 * The receive operation is badly documented in the datasheet, so I'll 1046 * attempt to document it here. The driver provides a buffer area and 1047 * places its base address in the RX buffer start address register. 1048 * The chip then begins copying frames into the RX buffer. Each frame 1049 * is preceeded by a 32-bit RX status word which specifies the length 1050 * of the frame and certain other status bits. Each frame (starting with 1051 * the status word) is also 32-bit aligned. The frame length is in the 1052 * first 16 bits of the status word; the lower 15 bits correspond with 1053 * the 'rx status register' mentioned in the datasheet. 1054 * 1055 * Note: to make the Alpha happy, the frame payload needs to be aligned 1056 * on a 32-bit boundary. To achieve this, we cheat a bit by copying from 1057 * the ring buffer starting at an address two bytes before the actual 1058 * data location. We can then shave off the first two bytes using m_adj(). 1059 * The reason we do this is because m_devget() doesn't let us specify an 1060 * offset into the mbuf storage space, so we have to artificially create 1061 * one. The ring is allocated in such a way that there are a few unused 1062 * bytes of space preceecing it so that it will be safe for us to do the 1063 * 2-byte backstep even if reading from the ring at offset 0. 1064 */ 1065 static void rl_rxeof(sc) 1066 struct rl_softc *sc; 1067 { 1068 struct ether_header *eh; 1069 struct mbuf *m; 1070 struct ifnet *ifp; 1071 int total_len = 0; 1072 u_int32_t rxstat; 1073 caddr_t rxbufpos; 1074 int wrap = 0; 1075 u_int16_t cur_rx; 1076 u_int16_t limit; 1077 u_int16_t rx_bytes = 0, max_bytes; 1078 1079 ifp = &sc->arpcom.ac_if; 1080 1081 cur_rx = (CSR_READ_2(sc, RL_CURRXADDR) + 16) % RL_RXBUFLEN; 1082 1083 /* Do not try to read past this point. */ 1084 limit = CSR_READ_2(sc, RL_CURRXBUF) % RL_RXBUFLEN; 1085 1086 if (limit < cur_rx) 1087 max_bytes = (RL_RXBUFLEN - cur_rx) + limit; 1088 else 1089 max_bytes = limit - cur_rx; 1090 1091 while((CSR_READ_1(sc, RL_COMMAND) & RL_CMD_EMPTY_RXBUF) == 0) { 1092 #ifdef DEVICE_POLLING 1093 if (ifp->if_ipending & IFF_POLLING) { 1094 if (sc->rxcycles <= 0) 1095 break; 1096 sc->rxcycles--; 1097 } 1098 #endif /* DEVICE_POLLING */ 1099 rxbufpos = sc->rl_cdata.rl_rx_buf + cur_rx; 1100 rxstat = *(u_int32_t *)rxbufpos; 1101 1102 /* 1103 * Here's a totally undocumented fact for you. When the 1104 * RealTek chip is in the process of copying a packet into 1105 * RAM for you, the length will be 0xfff0. If you spot a 1106 * packet header with this value, you need to stop. The 1107 * datasheet makes absolutely no mention of this and 1108 * RealTek should be shot for this. 1109 */ 1110 if ((u_int16_t)(rxstat >> 16) == RL_RXSTAT_UNFINISHED) 1111 break; 1112 1113 if (!(rxstat & RL_RXSTAT_RXOK)) { 1114 ifp->if_ierrors++; 1115 rl_init(sc); 1116 return; 1117 } 1118 1119 /* No errors; receive the packet. */ 1120 total_len = rxstat >> 16; 1121 rx_bytes += total_len + 4; 1122 1123 /* 1124 * XXX The RealTek chip includes the CRC with every 1125 * received frame, and there's no way to turn this 1126 * behavior off (at least, I can't find anything in 1127 * the manual that explains how to do it) so we have 1128 * to trim off the CRC manually. 1129 */ 1130 total_len -= ETHER_CRC_LEN; 1131 1132 /* 1133 * Avoid trying to read more bytes than we know 1134 * the chip has prepared for us. 1135 */ 1136 if (rx_bytes > max_bytes) 1137 break; 1138 1139 rxbufpos = sc->rl_cdata.rl_rx_buf + 1140 ((cur_rx + sizeof(u_int32_t)) % RL_RXBUFLEN); 1141 1142 if (rxbufpos == (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN)) 1143 rxbufpos = sc->rl_cdata.rl_rx_buf; 1144 1145 wrap = (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN) - rxbufpos; 1146 1147 if (total_len > wrap) { 1148 /* 1149 * Fool m_devget() into thinking we want to copy 1150 * the whole buffer so we don't end up fragmenting 1151 * the data. 1152 */ 1153 m = m_devget(rxbufpos - RL_ETHER_ALIGN, 1154 total_len + RL_ETHER_ALIGN, 0, ifp, NULL); 1155 if (m == NULL) { 1156 ifp->if_ierrors++; 1157 } else { 1158 m_adj(m, RL_ETHER_ALIGN); 1159 m_copyback(m, wrap, total_len - wrap, 1160 sc->rl_cdata.rl_rx_buf); 1161 } 1162 cur_rx = (total_len - wrap + ETHER_CRC_LEN); 1163 } else { 1164 m = m_devget(rxbufpos - RL_ETHER_ALIGN, 1165 total_len + RL_ETHER_ALIGN, 0, ifp, NULL); 1166 if (m == NULL) { 1167 ifp->if_ierrors++; 1168 } else 1169 m_adj(m, RL_ETHER_ALIGN); 1170 cur_rx += total_len + 4 + ETHER_CRC_LEN; 1171 } 1172 1173 /* 1174 * Round up to 32-bit boundary. 1175 */ 1176 cur_rx = (cur_rx + 3) & ~3; 1177 CSR_WRITE_2(sc, RL_CURRXADDR, cur_rx - 16); 1178 1179 if (m == NULL) 1180 continue; 1181 1182 eh = mtod(m, struct ether_header *); 1183 ifp->if_ipackets++; 1184 1185 /* Remove header from mbuf and pass it on. */ 1186 m_adj(m, sizeof(struct ether_header)); 1187 ether_input(ifp, eh, m); 1188 } 1189 1190 return; 1191 } 1192 1193 /* 1194 * A frame was downloaded to the chip. It's safe for us to clean up 1195 * the list buffers. 1196 */ 1197 static void rl_txeof(sc) 1198 struct rl_softc *sc; 1199 { 1200 struct ifnet *ifp; 1201 u_int32_t txstat; 1202 1203 ifp = &sc->arpcom.ac_if; 1204 1205 /* 1206 * Go through our tx list and free mbufs for those 1207 * frames that have been uploaded. 1208 */ 1209 do { 1210 txstat = CSR_READ_4(sc, RL_LAST_TXSTAT(sc)); 1211 if (!(txstat & (RL_TXSTAT_TX_OK| 1212 RL_TXSTAT_TX_UNDERRUN|RL_TXSTAT_TXABRT))) 1213 break; 1214 1215 ifp->if_collisions += (txstat & RL_TXSTAT_COLLCNT) >> 24; 1216 1217 if (RL_LAST_TXMBUF(sc) != NULL) { 1218 m_freem(RL_LAST_TXMBUF(sc)); 1219 RL_LAST_TXMBUF(sc) = NULL; 1220 } 1221 if (txstat & RL_TXSTAT_TX_OK) 1222 ifp->if_opackets++; 1223 else { 1224 int oldthresh; 1225 ifp->if_oerrors++; 1226 if ((txstat & RL_TXSTAT_TXABRT) || 1227 (txstat & RL_TXSTAT_OUTOFWIN)) 1228 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG); 1229 oldthresh = sc->rl_txthresh; 1230 /* error recovery */ 1231 rl_reset(sc); 1232 rl_init(sc); 1233 /* 1234 * If there was a transmit underrun, 1235 * bump the TX threshold. 1236 */ 1237 if (txstat & RL_TXSTAT_TX_UNDERRUN) 1238 sc->rl_txthresh = oldthresh + 32; 1239 return; 1240 } 1241 RL_INC(sc->rl_cdata.last_tx); 1242 ifp->if_flags &= ~IFF_OACTIVE; 1243 } while (sc->rl_cdata.last_tx != sc->rl_cdata.cur_tx); 1244 1245 ifp->if_timer = 1246 (sc->rl_cdata.last_tx == sc->rl_cdata.cur_tx) ? 0 : 5; 1247 1248 return; 1249 } 1250 1251 static void rl_tick(xsc) 1252 void *xsc; 1253 { 1254 struct rl_softc *sc; 1255 struct mii_data *mii; 1256 int s; 1257 1258 s = splimp(); 1259 1260 sc = xsc; 1261 mii = device_get_softc(sc->rl_miibus); 1262 1263 mii_tick(mii); 1264 1265 splx(s); 1266 1267 sc->rl_stat_ch = timeout(rl_tick, sc, hz); 1268 1269 return; 1270 } 1271 1272 #ifdef DEVICE_POLLING 1273 static poll_handler_t rl_poll; 1274 1275 static void 1276 rl_poll (struct ifnet *ifp, enum poll_cmd cmd, int count) 1277 { 1278 struct rl_softc *sc = ifp->if_softc; 1279 1280 if (cmd == POLL_DEREGISTER) { /* final call, enable interrupts */ 1281 CSR_WRITE_4(sc, RL_IMR, RL_INTRS); 1282 return; 1283 } 1284 1285 sc->rxcycles = count; 1286 rl_rxeof(sc); 1287 rl_txeof(sc); 1288 if (ifp->if_snd.ifq_head != NULL) 1289 rl_start(ifp); 1290 1291 if (cmd == POLL_AND_CHECK_STATUS) { /* also check status register */ 1292 u_int16_t status; 1293 1294 status = CSR_READ_2(sc, RL_ISR); 1295 if (status) 1296 CSR_WRITE_2(sc, RL_ISR, status); 1297 1298 /* 1299 * XXX check behaviour on receiver stalls. 1300 */ 1301 1302 if (status & RL_ISR_SYSTEM_ERR) { 1303 rl_reset(sc); 1304 rl_init(sc); 1305 } 1306 } 1307 } 1308 #endif /* DEVICE_POLLING */ 1309 1310 static void rl_intr(arg) 1311 void *arg; 1312 { 1313 struct rl_softc *sc; 1314 struct ifnet *ifp; 1315 u_int16_t status; 1316 1317 sc = arg; 1318 1319 if (sc->suspended) { 1320 return; 1321 } 1322 1323 ifp = &sc->arpcom.ac_if; 1324 #ifdef DEVICE_POLLING 1325 if (ifp->if_ipending & IFF_POLLING) 1326 return; 1327 if (ether_poll_register(rl_poll, ifp)) { /* ok, disable interrupts */ 1328 CSR_WRITE_2(sc, RL_IMR, 0x0000); 1329 rl_poll(ifp, 0, 1); 1330 return; 1331 } 1332 #endif /* DEVICE_POLLING */ 1333 1334 for (;;) { 1335 1336 status = CSR_READ_2(sc, RL_ISR); 1337 if (status) 1338 CSR_WRITE_2(sc, RL_ISR, status); 1339 1340 if ((status & RL_INTRS) == 0) 1341 break; 1342 1343 if (status & RL_ISR_RX_OK) 1344 rl_rxeof(sc); 1345 1346 if (status & RL_ISR_RX_ERR) 1347 rl_rxeof(sc); 1348 1349 if ((status & RL_ISR_TX_OK) || (status & RL_ISR_TX_ERR)) 1350 rl_txeof(sc); 1351 1352 if (status & RL_ISR_SYSTEM_ERR) { 1353 rl_reset(sc); 1354 rl_init(sc); 1355 } 1356 1357 } 1358 if (ifp->if_snd.ifq_head != NULL) 1359 rl_start(ifp); 1360 1361 return; 1362 } 1363 1364 /* 1365 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 1366 * pointers to the fragment pointers. 1367 */ 1368 static int rl_encap(sc, m_head) 1369 struct rl_softc *sc; 1370 struct mbuf *m_head; 1371 { 1372 struct mbuf *m_new = NULL; 1373 1374 /* 1375 * The RealTek is brain damaged and wants longword-aligned 1376 * TX buffers, plus we can only have one fragment buffer 1377 * per packet. We have to copy pretty much all the time. 1378 */ 1379 1380 MGETHDR(m_new, M_DONTWAIT, MT_DATA); 1381 if (m_new == NULL) 1382 return(1); 1383 if (m_head->m_pkthdr.len > MHLEN) { 1384 MCLGET(m_new, M_DONTWAIT); 1385 if (!(m_new->m_flags & M_EXT)) { 1386 m_freem(m_new); 1387 return(1); 1388 } 1389 } 1390 m_copydata(m_head, 0, m_head->m_pkthdr.len, mtod(m_new, caddr_t)); 1391 m_new->m_pkthdr.len = m_new->m_len = m_head->m_pkthdr.len; 1392 m_freem(m_head); 1393 m_head = m_new; 1394 1395 /* Pad frames to at least 60 bytes. */ 1396 if (m_head->m_pkthdr.len < RL_MIN_FRAMELEN) { 1397 /* 1398 * Make security concious people happy: zero out the 1399 * bytes in the pad area, since we don't know what 1400 * this mbuf cluster buffer's previous user might 1401 * have left in it. 1402 */ 1403 bzero(mtod(m_head, char *) + m_head->m_pkthdr.len, 1404 RL_MIN_FRAMELEN - m_head->m_pkthdr.len); 1405 m_head->m_pkthdr.len += 1406 (RL_MIN_FRAMELEN - m_head->m_pkthdr.len); 1407 m_head->m_len = m_head->m_pkthdr.len; 1408 } 1409 1410 RL_CUR_TXMBUF(sc) = m_head; 1411 1412 return(0); 1413 } 1414 1415 /* 1416 * Main transmit routine. 1417 */ 1418 1419 static void rl_start(ifp) 1420 struct ifnet *ifp; 1421 { 1422 struct rl_softc *sc; 1423 struct mbuf *m_head = NULL; 1424 1425 sc = ifp->if_softc; 1426 1427 while(RL_CUR_TXMBUF(sc) == NULL) { 1428 IF_DEQUEUE(&ifp->if_snd, m_head); 1429 if (m_head == NULL) 1430 break; 1431 1432 if (rl_encap(sc, m_head)) { 1433 IF_PREPEND(&ifp->if_snd, m_head); 1434 ifp->if_flags |= IFF_OACTIVE; 1435 break; 1436 } 1437 1438 /* 1439 * If there's a BPF listener, bounce a copy of this frame 1440 * to him. 1441 */ 1442 if (ifp->if_bpf) 1443 bpf_mtap(ifp, RL_CUR_TXMBUF(sc)); 1444 1445 /* 1446 * Transmit the frame. 1447 */ 1448 CSR_WRITE_4(sc, RL_CUR_TXADDR(sc), 1449 vtophys(mtod(RL_CUR_TXMBUF(sc), caddr_t))); 1450 CSR_WRITE_4(sc, RL_CUR_TXSTAT(sc), 1451 RL_TXTHRESH(sc->rl_txthresh) | 1452 RL_CUR_TXMBUF(sc)->m_pkthdr.len); 1453 1454 RL_INC(sc->rl_cdata.cur_tx); 1455 } 1456 1457 /* 1458 * We broke out of the loop because all our TX slots are 1459 * full. Mark the NIC as busy until it drains some of the 1460 * packets from the queue. 1461 */ 1462 if (RL_CUR_TXMBUF(sc) != NULL) 1463 ifp->if_flags |= IFF_OACTIVE; 1464 1465 /* 1466 * Set a timeout in case the chip goes out to lunch. 1467 */ 1468 ifp->if_timer = 5; 1469 1470 return; 1471 } 1472 1473 static void rl_init(xsc) 1474 void *xsc; 1475 { 1476 struct rl_softc *sc = xsc; 1477 struct ifnet *ifp = &sc->arpcom.ac_if; 1478 struct mii_data *mii; 1479 int s, i; 1480 u_int32_t rxcfg = 0; 1481 1482 s = splimp(); 1483 1484 mii = device_get_softc(sc->rl_miibus); 1485 1486 /* 1487 * Cancel pending I/O and free all RX/TX buffers. 1488 */ 1489 rl_stop(sc); 1490 1491 /* Init our MAC address */ 1492 for (i = 0; i < ETHER_ADDR_LEN; i++) { 1493 CSR_WRITE_1(sc, RL_IDR0 + i, sc->arpcom.ac_enaddr[i]); 1494 } 1495 1496 /* Init the RX buffer pointer register. */ 1497 CSR_WRITE_4(sc, RL_RXADDR, vtophys(sc->rl_cdata.rl_rx_buf)); 1498 1499 /* Init TX descriptors. */ 1500 rl_list_tx_init(sc); 1501 1502 /* 1503 * Enable transmit and receive. 1504 */ 1505 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB); 1506 1507 /* 1508 * Set the initial TX and RX configuration. 1509 */ 1510 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG); 1511 CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG); 1512 1513 /* Set the individual bit to receive frames for this host only. */ 1514 rxcfg = CSR_READ_4(sc, RL_RXCFG); 1515 rxcfg |= RL_RXCFG_RX_INDIV; 1516 1517 /* If we want promiscuous mode, set the allframes bit. */ 1518 if (ifp->if_flags & IFF_PROMISC) { 1519 rxcfg |= RL_RXCFG_RX_ALLPHYS; 1520 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 1521 } else { 1522 rxcfg &= ~RL_RXCFG_RX_ALLPHYS; 1523 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 1524 } 1525 1526 /* 1527 * Set capture broadcast bit to capture broadcast frames. 1528 */ 1529 if (ifp->if_flags & IFF_BROADCAST) { 1530 rxcfg |= RL_RXCFG_RX_BROAD; 1531 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 1532 } else { 1533 rxcfg &= ~RL_RXCFG_RX_BROAD; 1534 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 1535 } 1536 1537 /* 1538 * Program the multicast filter, if necessary. 1539 */ 1540 rl_setmulti(sc); 1541 1542 #ifdef DEVICE_POLLING 1543 /* 1544 * Only enable interrupts if we are polling, keep them off otherwise. 1545 */ 1546 if (ifp->if_ipending & IFF_POLLING) 1547 CSR_WRITE_2(sc, RL_IMR, 0); 1548 else 1549 #endif /* DEVICE_POLLING */ 1550 /* 1551 * Enable interrupts. 1552 */ 1553 CSR_WRITE_2(sc, RL_IMR, RL_INTRS); 1554 1555 /* Set initial TX threshold */ 1556 sc->rl_txthresh = RL_TX_THRESH_INIT; 1557 1558 /* Start RX/TX process. */ 1559 CSR_WRITE_4(sc, RL_MISSEDPKT, 0); 1560 1561 /* Enable receiver and transmitter. */ 1562 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB); 1563 1564 mii_mediachg(mii); 1565 1566 CSR_WRITE_1(sc, RL_CFG1, RL_CFG1_DRVLOAD|RL_CFG1_FULLDUPLEX); 1567 1568 ifp->if_flags |= IFF_RUNNING; 1569 ifp->if_flags &= ~IFF_OACTIVE; 1570 1571 (void)splx(s); 1572 1573 sc->rl_stat_ch = timeout(rl_tick, sc, hz); 1574 1575 return; 1576 } 1577 1578 /* 1579 * Set media options. 1580 */ 1581 static int rl_ifmedia_upd(ifp) 1582 struct ifnet *ifp; 1583 { 1584 struct rl_softc *sc; 1585 struct mii_data *mii; 1586 1587 sc = ifp->if_softc; 1588 mii = device_get_softc(sc->rl_miibus); 1589 mii_mediachg(mii); 1590 1591 return(0); 1592 } 1593 1594 /* 1595 * Report current media status. 1596 */ 1597 static void rl_ifmedia_sts(ifp, ifmr) 1598 struct ifnet *ifp; 1599 struct ifmediareq *ifmr; 1600 { 1601 struct rl_softc *sc; 1602 struct mii_data *mii; 1603 1604 sc = ifp->if_softc; 1605 mii = device_get_softc(sc->rl_miibus); 1606 1607 mii_pollstat(mii); 1608 ifmr->ifm_active = mii->mii_media_active; 1609 ifmr->ifm_status = mii->mii_media_status; 1610 1611 return; 1612 } 1613 1614 static int rl_ioctl(ifp, command, data) 1615 struct ifnet *ifp; 1616 u_long command; 1617 caddr_t data; 1618 { 1619 struct rl_softc *sc = ifp->if_softc; 1620 struct ifreq *ifr = (struct ifreq *) data; 1621 struct mii_data *mii; 1622 int s, error = 0; 1623 1624 s = splimp(); 1625 1626 switch(command) { 1627 case SIOCSIFADDR: 1628 case SIOCGIFADDR: 1629 case SIOCSIFMTU: 1630 error = ether_ioctl(ifp, command, data); 1631 break; 1632 case SIOCSIFFLAGS: 1633 if (ifp->if_flags & IFF_UP) { 1634 rl_init(sc); 1635 } else { 1636 if (ifp->if_flags & IFF_RUNNING) 1637 rl_stop(sc); 1638 } 1639 error = 0; 1640 break; 1641 case SIOCADDMULTI: 1642 case SIOCDELMULTI: 1643 rl_setmulti(sc); 1644 error = 0; 1645 break; 1646 case SIOCGIFMEDIA: 1647 case SIOCSIFMEDIA: 1648 mii = device_get_softc(sc->rl_miibus); 1649 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 1650 break; 1651 default: 1652 error = EINVAL; 1653 break; 1654 } 1655 1656 (void)splx(s); 1657 1658 return(error); 1659 } 1660 1661 static void rl_watchdog(ifp) 1662 struct ifnet *ifp; 1663 { 1664 struct rl_softc *sc; 1665 1666 sc = ifp->if_softc; 1667 1668 printf("rl%d: watchdog timeout\n", sc->rl_unit); 1669 ifp->if_oerrors++; 1670 1671 rl_txeof(sc); 1672 rl_rxeof(sc); 1673 rl_init(sc); 1674 1675 return; 1676 } 1677 1678 /* 1679 * Stop the adapter and free any mbufs allocated to the 1680 * RX and TX lists. 1681 */ 1682 static void rl_stop(sc) 1683 struct rl_softc *sc; 1684 { 1685 int i; 1686 struct ifnet *ifp; 1687 1688 ifp = &sc->arpcom.ac_if; 1689 ifp->if_timer = 0; 1690 1691 untimeout(rl_tick, sc, sc->rl_stat_ch); 1692 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1693 #ifdef DEVICE_POLLING 1694 ether_poll_deregister(ifp); 1695 #endif /* DEVICE_POLLING */ 1696 1697 CSR_WRITE_1(sc, RL_COMMAND, 0x00); 1698 CSR_WRITE_2(sc, RL_IMR, 0x0000); 1699 1700 /* 1701 * Free the TX list buffers. 1702 */ 1703 for (i = 0; i < RL_TX_LIST_CNT; i++) { 1704 if (sc->rl_cdata.rl_tx_chain[i] != NULL) { 1705 m_freem(sc->rl_cdata.rl_tx_chain[i]); 1706 sc->rl_cdata.rl_tx_chain[i] = NULL; 1707 CSR_WRITE_4(sc, RL_TXADDR0 + i, 0x0000000); 1708 } 1709 } 1710 1711 1712 return; 1713 } 1714 1715 /* 1716 * Stop all chip I/O so that the kernel's probe routines don't 1717 * get confused by errant DMAs when rebooting. 1718 */ 1719 static void rl_shutdown(dev) 1720 device_t dev; 1721 { 1722 struct rl_softc *sc; 1723 1724 sc = device_get_softc(dev); 1725 1726 rl_stop(sc); 1727 1728 return; 1729 } 1730 1731 /* 1732 * Device suspend routine. Stop the interface and save some PCI 1733 * settings in case the BIOS doesn't restore them properly on 1734 * resume. 1735 */ 1736 static int rl_suspend(dev) 1737 device_t dev; 1738 { 1739 int i; 1740 struct rl_softc *sc; 1741 1742 sc = device_get_softc(dev); 1743 1744 rl_stop(sc); 1745 1746 for (i = 0; i < 5; i++) 1747 sc->saved_maps[i] = pci_read_config(dev, PCIR_MAPS + i * 4, 4); 1748 sc->saved_biosaddr = pci_read_config(dev, PCIR_BIOS, 4); 1749 sc->saved_intline = pci_read_config(dev, PCIR_INTLINE, 1); 1750 sc->saved_cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1); 1751 sc->saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1); 1752 1753 sc->suspended = 1; 1754 1755 return (0); 1756 } 1757 1758 /* 1759 * Device resume routine. Restore some PCI settings in case the BIOS 1760 * doesn't, re-enable busmastering, and restart the interface if 1761 * appropriate. 1762 */ 1763 static int rl_resume(dev) 1764 device_t dev; 1765 { 1766 int i; 1767 struct rl_softc *sc; 1768 struct ifnet *ifp; 1769 1770 sc = device_get_softc(dev); 1771 ifp = &sc->arpcom.ac_if; 1772 1773 /* better way to do this? */ 1774 for (i = 0; i < 5; i++) 1775 pci_write_config(dev, PCIR_MAPS + i * 4, sc->saved_maps[i], 4); 1776 pci_write_config(dev, PCIR_BIOS, sc->saved_biosaddr, 4); 1777 pci_write_config(dev, PCIR_INTLINE, sc->saved_intline, 1); 1778 pci_write_config(dev, PCIR_CACHELNSZ, sc->saved_cachelnsz, 1); 1779 pci_write_config(dev, PCIR_LATTIMER, sc->saved_lattimer, 1); 1780 1781 /* reenable busmastering */ 1782 pci_enable_busmaster(dev); 1783 pci_enable_io(dev, RL_RES); 1784 1785 /* reinitialize interface if necessary */ 1786 if (ifp->if_flags & IFF_UP) 1787 rl_init(sc); 1788 1789 sc->suspended = 0; 1790 1791 return (0); 1792 } 1793