1 /* 2 * Copyright (c) 1997, 1998-2003 3 * Bill Paul <wpaul@windriver.com>. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * RealTek 8139C+/8169/8169S/8110S PCI NIC driver 38 * 39 * Written by Bill Paul <wpaul@windriver.com> 40 * Senior Networking Software Engineer 41 * Wind River Systems 42 */ 43 44 /* 45 * This driver is designed to support RealTek's next generation of 46 * 10/100 and 10/100/1000 PCI ethernet controllers. There are currently 47 * four devices in this family: the RTL8139C+, the RTL8169, the RTL8169S 48 * and the RTL8110S. 49 * 50 * The 8139C+ is a 10/100 ethernet chip. It is backwards compatible 51 * with the older 8139 family, however it also supports a special 52 * C+ mode of operation that provides several new performance enhancing 53 * features. These include: 54 * 55 * o Descriptor based DMA mechanism. Each descriptor represents 56 * a single packet fragment. Data buffers may be aligned on 57 * any byte boundary. 58 * 59 * o 64-bit DMA 60 * 61 * o TCP/IP checksum offload for both RX and TX 62 * 63 * o High and normal priority transmit DMA rings 64 * 65 * o VLAN tag insertion and extraction 66 * 67 * o TCP large send (segmentation offload) 68 * 69 * Like the 8139, the 8139C+ also has a built-in 10/100 PHY. The C+ 70 * programming API is fairly straightforward. The RX filtering, EEPROM 71 * access and PHY access is the same as it is on the older 8139 series 72 * chips. 73 * 74 * The 8169 is a 64-bit 10/100/1000 gigabit ethernet MAC. It has almost the 75 * same programming API and feature set as the 8139C+ with the following 76 * differences and additions: 77 * 78 * o 1000Mbps mode 79 * 80 * o Jumbo frames 81 * 82 * o GMII and TBI ports/registers for interfacing with copper 83 * or fiber PHYs 84 * 85 * o RX and TX DMA rings can have up to 1024 descriptors 86 * (the 8139C+ allows a maximum of 64) 87 * 88 * o Slight differences in register layout from the 8139C+ 89 * 90 * The TX start and timer interrupt registers are at different locations 91 * on the 8169 than they are on the 8139C+. Also, the status word in the 92 * RX descriptor has a slightly different bit layout. The 8169 does not 93 * have a built-in PHY. Most reference boards use a Marvell 88E1000 'Alaska' 94 * copper gigE PHY. 95 * 96 * The 8169S/8110S 10/100/1000 devices have built-in copper gigE PHYs 97 * (the 'S' stands for 'single-chip'). These devices have the same 98 * programming API as the older 8169, but also have some vendor-specific 99 * registers for the on-board PHY. The 8110S is a LAN-on-motherboard 100 * part designed to be pin-compatible with the RealTek 8100 10/100 chip. 101 * 102 * This driver takes advantage of the RX and TX checksum offload and 103 * VLAN tag insertion/extraction features. It also implements TX 104 * interrupt moderation using the timer interrupt registers, which 105 * significantly reduces TX interrupt load. There is also support 106 * for jumbo frames, however the 8169/8169S/8110S can not transmit 107 * jumbo frames larger than 7.5K, so the max MTU possible with this 108 * driver is 7500 bytes. 109 */ 110 111 #include <sys/param.h> 112 #include <sys/endian.h> 113 #include <sys/systm.h> 114 #include <sys/sockio.h> 115 #include <sys/mbuf.h> 116 #include <sys/malloc.h> 117 #include <sys/kernel.h> 118 #include <sys/socket.h> 119 120 #include <net/if.h> 121 #include <net/if_arp.h> 122 #include <net/ethernet.h> 123 #include <net/if_dl.h> 124 #include <net/if_media.h> 125 #include <net/if_vlan_var.h> 126 127 #include <net/bpf.h> 128 129 #include <machine/bus_pio.h> 130 #include <machine/bus_memio.h> 131 #include <machine/bus.h> 132 #include <machine/resource.h> 133 #include <sys/bus.h> 134 #include <sys/rman.h> 135 136 #include <dev/mii/mii.h> 137 #include <dev/mii/miivar.h> 138 139 #include <dev/pci/pcireg.h> 140 #include <dev/pci/pcivar.h> 141 142 MODULE_DEPEND(re, pci, 1, 1, 1); 143 MODULE_DEPEND(re, ether, 1, 1, 1); 144 MODULE_DEPEND(re, miibus, 1, 1, 1); 145 146 /* "controller miibus0" required. See GENERIC if you get errors here. */ 147 #include "miibus_if.h" 148 149 /* 150 * Default to using PIO access for this driver. 151 */ 152 #define RE_USEIOSPACE 153 154 #include <pci/if_rlreg.h> 155 156 #define RE_CSUM_FEATURES (CSUM_IP | CSUM_TCP | CSUM_UDP) 157 158 /* 159 * Various supported device vendors/types and their names. 160 */ 161 static struct rl_type re_devs[] = { 162 { RT_VENDORID, RT_DEVICEID_8139, RL_HWREV_8139CPLUS, 163 "RealTek 8139C+ 10/100BaseTX" }, 164 { RT_VENDORID, RT_DEVICEID_8169, RL_HWREV_8169, 165 "RealTek 8169 Gigabit Ethernet" }, 166 { RT_VENDORID, RT_DEVICEID_8169, RL_HWREV_8169S, 167 "RealTek 8169S Single-chip Gigabit Ethernet" }, 168 { RT_VENDORID, RT_DEVICEID_8169, RL_HWREV_8110S, 169 "RealTek 8110S Single-chip Gigabit Ethernet" }, 170 { 0, 0, 0, NULL } 171 }; 172 173 static struct rl_hwrev re_hwrevs[] = { 174 { RL_HWREV_8139, RL_8139, "" }, 175 { RL_HWREV_8139A, RL_8139, "A" }, 176 { RL_HWREV_8139AG, RL_8139, "A-G" }, 177 { RL_HWREV_8139B, RL_8139, "B" }, 178 { RL_HWREV_8130, RL_8139, "8130" }, 179 { RL_HWREV_8139C, RL_8139, "C" }, 180 { RL_HWREV_8139D, RL_8139, "8139D/8100B/8100C" }, 181 { RL_HWREV_8139CPLUS, RL_8139CPLUS, "C+"}, 182 { RL_HWREV_8169, RL_8169, "8169"}, 183 { RL_HWREV_8169S, RL_8169, "8169S"}, 184 { RL_HWREV_8110S, RL_8169, "8110S"}, 185 { RL_HWREV_8100, RL_8139, "8100"}, 186 { RL_HWREV_8101, RL_8139, "8101"}, 187 { 0, 0, NULL } 188 }; 189 190 static int re_probe (device_t); 191 static int re_attach (device_t); 192 static int re_detach (device_t); 193 194 static int re_encap (struct rl_softc *, struct mbuf *, int *); 195 196 static void re_dma_map_addr (void *, bus_dma_segment_t *, int, int); 197 static void re_dma_map_desc (void *, bus_dma_segment_t *, int, 198 bus_size_t, int); 199 static int re_allocmem (device_t, struct rl_softc *); 200 static int re_newbuf (struct rl_softc *, int, struct mbuf *); 201 static int re_rx_list_init (struct rl_softc *); 202 static int re_tx_list_init (struct rl_softc *); 203 static void re_rxeof (struct rl_softc *); 204 static void re_txeof (struct rl_softc *); 205 static void re_intr (void *); 206 static void re_tick (void *); 207 static void re_start (struct ifnet *); 208 static int re_ioctl (struct ifnet *, u_long, caddr_t); 209 static void re_init (void *); 210 static void re_stop (struct rl_softc *); 211 static void re_watchdog (struct ifnet *); 212 static int re_suspend (device_t); 213 static int re_resume (device_t); 214 static void re_shutdown (device_t); 215 static int re_ifmedia_upd (struct ifnet *); 216 static void re_ifmedia_sts (struct ifnet *, struct ifmediareq *); 217 218 static void re_eeprom_putbyte (struct rl_softc *, int); 219 static void re_eeprom_getword (struct rl_softc *, int, u_int16_t *); 220 static void re_read_eeprom (struct rl_softc *, caddr_t, int, int, int); 221 static int re_gmii_readreg (device_t, int, int); 222 static int re_gmii_writereg (device_t, int, int, int); 223 224 static int re_miibus_readreg (device_t, int, int); 225 static int re_miibus_writereg (device_t, int, int, int); 226 static void re_miibus_statchg (device_t); 227 228 static uint32_t re_mchash (const uint8_t *); 229 static void re_setmulti (struct rl_softc *); 230 static void re_reset (struct rl_softc *); 231 232 static int re_diag (struct rl_softc *); 233 234 #ifdef RE_USEIOSPACE 235 #define RL_RES SYS_RES_IOPORT 236 #define RL_RID RL_PCI_LOIO 237 #else 238 #define RL_RES SYS_RES_MEMORY 239 #define RL_RID RL_PCI_LOMEM 240 #endif 241 242 static device_method_t re_methods[] = { 243 /* Device interface */ 244 DEVMETHOD(device_probe, re_probe), 245 DEVMETHOD(device_attach, re_attach), 246 DEVMETHOD(device_detach, re_detach), 247 DEVMETHOD(device_suspend, re_suspend), 248 DEVMETHOD(device_resume, re_resume), 249 DEVMETHOD(device_shutdown, re_shutdown), 250 251 /* bus interface */ 252 DEVMETHOD(bus_print_child, bus_generic_print_child), 253 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 254 255 /* MII interface */ 256 DEVMETHOD(miibus_readreg, re_miibus_readreg), 257 DEVMETHOD(miibus_writereg, re_miibus_writereg), 258 DEVMETHOD(miibus_statchg, re_miibus_statchg), 259 260 { 0, 0 } 261 }; 262 263 static driver_t re_driver = { 264 "re", 265 re_methods, 266 sizeof(struct rl_softc) 267 }; 268 269 static devclass_t re_devclass; 270 271 DRIVER_MODULE(re, pci, re_driver, re_devclass, 0, 0); 272 DRIVER_MODULE(re, cardbus, re_driver, re_devclass, 0, 0); 273 DRIVER_MODULE(miibus, re, miibus_driver, miibus_devclass, 0, 0); 274 275 #define EE_SET(x) \ 276 CSR_WRITE_1(sc, RL_EECMD, \ 277 CSR_READ_1(sc, RL_EECMD) | x) 278 279 #define EE_CLR(x) \ 280 CSR_WRITE_1(sc, RL_EECMD, \ 281 CSR_READ_1(sc, RL_EECMD) & ~x) 282 283 /* 284 * Send a read command and address to the EEPROM, check for ACK. 285 */ 286 static void 287 re_eeprom_putbyte(sc, addr) 288 struct rl_softc *sc; 289 int addr; 290 { 291 register int d, i; 292 293 d = addr | sc->rl_eecmd_read; 294 295 /* 296 * Feed in each bit and strobe the clock. 297 */ 298 for (i = 0x400; i; i >>= 1) { 299 if (d & i) { 300 EE_SET(RL_EE_DATAIN); 301 } else { 302 EE_CLR(RL_EE_DATAIN); 303 } 304 DELAY(100); 305 EE_SET(RL_EE_CLK); 306 DELAY(150); 307 EE_CLR(RL_EE_CLK); 308 DELAY(100); 309 } 310 311 return; 312 } 313 314 /* 315 * Read a word of data stored in the EEPROM at address 'addr.' 316 */ 317 static void 318 re_eeprom_getword(sc, addr, dest) 319 struct rl_softc *sc; 320 int addr; 321 u_int16_t *dest; 322 { 323 register int i; 324 u_int16_t word = 0; 325 326 /* Enter EEPROM access mode. */ 327 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL); 328 329 /* 330 * Send address of word we want to read. 331 */ 332 re_eeprom_putbyte(sc, addr); 333 334 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL); 335 336 /* 337 * Start reading bits from EEPROM. 338 */ 339 for (i = 0x8000; i; i >>= 1) { 340 EE_SET(RL_EE_CLK); 341 DELAY(100); 342 if (CSR_READ_1(sc, RL_EECMD) & RL_EE_DATAOUT) 343 word |= i; 344 EE_CLR(RL_EE_CLK); 345 DELAY(100); 346 } 347 348 /* Turn off EEPROM access mode. */ 349 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF); 350 351 *dest = word; 352 353 return; 354 } 355 356 /* 357 * Read a sequence of words from the EEPROM. 358 */ 359 static void 360 re_read_eeprom(sc, dest, off, cnt, swap) 361 struct rl_softc *sc; 362 caddr_t dest; 363 int off; 364 int cnt; 365 int swap; 366 { 367 int i; 368 u_int16_t word = 0, *ptr; 369 370 for (i = 0; i < cnt; i++) { 371 re_eeprom_getword(sc, off + i, &word); 372 ptr = (u_int16_t *)(dest + (i * 2)); 373 if (swap) 374 *ptr = ntohs(word); 375 else 376 *ptr = word; 377 } 378 379 return; 380 } 381 382 static int 383 re_gmii_readreg(dev, phy, reg) 384 device_t dev; 385 int phy, reg; 386 { 387 struct rl_softc *sc; 388 u_int32_t rval; 389 int i; 390 391 if (phy != 1) 392 return(0); 393 394 sc = device_get_softc(dev); 395 396 /* Let the rgephy driver read the GMEDIASTAT register */ 397 398 if (reg == RL_GMEDIASTAT) { 399 rval = CSR_READ_1(sc, RL_GMEDIASTAT); 400 return(rval); 401 } 402 403 CSR_WRITE_4(sc, RL_PHYAR, reg << 16); 404 DELAY(1000); 405 406 for (i = 0; i < RL_TIMEOUT; i++) { 407 rval = CSR_READ_4(sc, RL_PHYAR); 408 if (rval & RL_PHYAR_BUSY) 409 break; 410 DELAY(100); 411 } 412 413 if (i == RL_TIMEOUT) { 414 printf ("re%d: PHY read failed\n", sc->rl_unit); 415 return (0); 416 } 417 418 return (rval & RL_PHYAR_PHYDATA); 419 } 420 421 static int 422 re_gmii_writereg(dev, phy, reg, data) 423 device_t dev; 424 int phy, reg, data; 425 { 426 struct rl_softc *sc; 427 u_int32_t rval; 428 int i; 429 430 sc = device_get_softc(dev); 431 432 CSR_WRITE_4(sc, RL_PHYAR, (reg << 16) | 433 (data & RL_PHYAR_PHYDATA) | RL_PHYAR_BUSY); 434 DELAY(1000); 435 436 for (i = 0; i < RL_TIMEOUT; i++) { 437 rval = CSR_READ_4(sc, RL_PHYAR); 438 if (!(rval & RL_PHYAR_BUSY)) 439 break; 440 DELAY(100); 441 } 442 443 if (i == RL_TIMEOUT) { 444 printf ("re%d: PHY write failed\n", sc->rl_unit); 445 return (0); 446 } 447 448 return (0); 449 } 450 451 static int 452 re_miibus_readreg(dev, phy, reg) 453 device_t dev; 454 int phy, reg; 455 { 456 struct rl_softc *sc; 457 u_int16_t rval = 0; 458 u_int16_t re8139_reg = 0; 459 460 sc = device_get_softc(dev); 461 RL_LOCK(sc); 462 463 if (sc->rl_type == RL_8169) { 464 rval = re_gmii_readreg(dev, phy, reg); 465 RL_UNLOCK(sc); 466 return (rval); 467 } 468 469 /* Pretend the internal PHY is only at address 0 */ 470 if (phy) { 471 RL_UNLOCK(sc); 472 return(0); 473 } 474 switch(reg) { 475 case MII_BMCR: 476 re8139_reg = RL_BMCR; 477 break; 478 case MII_BMSR: 479 re8139_reg = RL_BMSR; 480 break; 481 case MII_ANAR: 482 re8139_reg = RL_ANAR; 483 break; 484 case MII_ANER: 485 re8139_reg = RL_ANER; 486 break; 487 case MII_ANLPAR: 488 re8139_reg = RL_LPAR; 489 break; 490 case MII_PHYIDR1: 491 case MII_PHYIDR2: 492 RL_UNLOCK(sc); 493 return(0); 494 /* 495 * Allow the rlphy driver to read the media status 496 * register. If we have a link partner which does not 497 * support NWAY, this is the register which will tell 498 * us the results of parallel detection. 499 */ 500 case RL_MEDIASTAT: 501 rval = CSR_READ_1(sc, RL_MEDIASTAT); 502 RL_UNLOCK(sc); 503 return(rval); 504 default: 505 printf("re%d: bad phy register\n", sc->rl_unit); 506 RL_UNLOCK(sc); 507 return(0); 508 } 509 rval = CSR_READ_2(sc, re8139_reg); 510 RL_UNLOCK(sc); 511 return(rval); 512 } 513 514 static int 515 re_miibus_writereg(dev, phy, reg, data) 516 device_t dev; 517 int phy, reg, data; 518 { 519 struct rl_softc *sc; 520 u_int16_t re8139_reg = 0; 521 int rval = 0; 522 523 sc = device_get_softc(dev); 524 RL_LOCK(sc); 525 526 if (sc->rl_type == RL_8169) { 527 rval = re_gmii_writereg(dev, phy, reg, data); 528 RL_UNLOCK(sc); 529 return (rval); 530 } 531 532 /* Pretend the internal PHY is only at address 0 */ 533 if (phy) { 534 RL_UNLOCK(sc); 535 return(0); 536 } 537 switch(reg) { 538 case MII_BMCR: 539 re8139_reg = RL_BMCR; 540 break; 541 case MII_BMSR: 542 re8139_reg = RL_BMSR; 543 break; 544 case MII_ANAR: 545 re8139_reg = RL_ANAR; 546 break; 547 case MII_ANER: 548 re8139_reg = RL_ANER; 549 break; 550 case MII_ANLPAR: 551 re8139_reg = RL_LPAR; 552 break; 553 case MII_PHYIDR1: 554 case MII_PHYIDR2: 555 RL_UNLOCK(sc); 556 return(0); 557 break; 558 default: 559 printf("re%d: bad phy register\n", sc->rl_unit); 560 RL_UNLOCK(sc); 561 return(0); 562 } 563 CSR_WRITE_2(sc, re8139_reg, data); 564 RL_UNLOCK(sc); 565 return(0); 566 } 567 568 static void 569 re_miibus_statchg(dev) 570 device_t dev; 571 { 572 return; 573 } 574 575 /* 576 * Calculate CRC of a multicast group address, return the upper 6 bits. 577 */ 578 static uint32_t 579 re_mchash(addr) 580 const uint8_t *addr; 581 { 582 uint32_t crc, carry; 583 int idx, bit; 584 uint8_t data; 585 586 /* Compute CRC for the address value. */ 587 crc = 0xFFFFFFFF; /* initial value */ 588 589 for (idx = 0; idx < 6; idx++) { 590 for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1) { 591 carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 592 crc <<= 1; 593 if (carry) 594 crc = (crc ^ 0x04c11db6) | carry; 595 } 596 } 597 598 /* return the filter bit position */ 599 return(crc >> 26); 600 } 601 602 /* 603 * Program the 64-bit multicast hash filter. 604 */ 605 static void 606 re_setmulti(sc) 607 struct rl_softc *sc; 608 { 609 struct ifnet *ifp; 610 int h = 0; 611 u_int32_t hashes[2] = { 0, 0 }; 612 struct ifmultiaddr *ifma; 613 u_int32_t rxfilt; 614 int mcnt = 0; 615 616 ifp = &sc->arpcom.ac_if; 617 618 rxfilt = CSR_READ_4(sc, RL_RXCFG); 619 620 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { 621 rxfilt |= RL_RXCFG_RX_MULTI; 622 CSR_WRITE_4(sc, RL_RXCFG, rxfilt); 623 CSR_WRITE_4(sc, RL_MAR0, 0xFFFFFFFF); 624 CSR_WRITE_4(sc, RL_MAR4, 0xFFFFFFFF); 625 return; 626 } 627 628 /* first, zot all the existing hash bits */ 629 CSR_WRITE_4(sc, RL_MAR0, 0); 630 CSR_WRITE_4(sc, RL_MAR4, 0); 631 632 /* now program new ones */ 633 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 634 if (ifma->ifma_addr->sa_family != AF_LINK) 635 continue; 636 h = re_mchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); 637 if (h < 32) 638 hashes[0] |= (1 << h); 639 else 640 hashes[1] |= (1 << (h - 32)); 641 mcnt++; 642 } 643 644 if (mcnt) 645 rxfilt |= RL_RXCFG_RX_MULTI; 646 else 647 rxfilt &= ~RL_RXCFG_RX_MULTI; 648 649 CSR_WRITE_4(sc, RL_RXCFG, rxfilt); 650 CSR_WRITE_4(sc, RL_MAR0, hashes[0]); 651 CSR_WRITE_4(sc, RL_MAR4, hashes[1]); 652 653 return; 654 } 655 656 static void 657 re_reset(sc) 658 struct rl_softc *sc; 659 { 660 register int i; 661 662 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_RESET); 663 664 for (i = 0; i < RL_TIMEOUT; i++) { 665 DELAY(10); 666 if (!(CSR_READ_1(sc, RL_COMMAND) & RL_CMD_RESET)) 667 break; 668 } 669 if (i == RL_TIMEOUT) 670 printf("re%d: reset never completed!\n", sc->rl_unit); 671 672 CSR_WRITE_1(sc, 0x82, 1); 673 674 return; 675 } 676 677 /* 678 * The following routine is designed to test for a defect on some 679 * 32-bit 8169 cards. Some of these NICs have the REQ64# and ACK64# 680 * lines connected to the bus, however for a 32-bit only card, they 681 * should be pulled high. The result of this defect is that the 682 * NIC will not work right if you plug it into a 64-bit slot: DMA 683 * operations will be done with 64-bit transfers, which will fail 684 * because the 64-bit data lines aren't connected. 685 * 686 * There's no way to work around this (short of talking a soldering 687 * iron to the board), however we can detect it. The method we use 688 * here is to put the NIC into digital loopback mode, set the receiver 689 * to promiscuous mode, and then try to send a frame. We then compare 690 * the frame data we sent to what was received. If the data matches, 691 * then the NIC is working correctly, otherwise we know the user has 692 * a defective NIC which has been mistakenly plugged into a 64-bit PCI 693 * slot. In the latter case, there's no way the NIC can work correctly, 694 * so we print out a message on the console and abort the device attach. 695 */ 696 697 static int 698 re_diag(sc) 699 struct rl_softc *sc; 700 { 701 struct ifnet *ifp = &sc->arpcom.ac_if; 702 struct mbuf *m0; 703 struct ether_header *eh; 704 struct rl_desc *cur_rx; 705 u_int16_t status; 706 u_int32_t rxstat; 707 int total_len, i, error = 0; 708 u_int8_t dst[] = { 0x00, 'h', 'e', 'l', 'l', 'o' }; 709 u_int8_t src[] = { 0x00, 'w', 'o', 'r', 'l', 'd' }; 710 711 /* Allocate a single mbuf */ 712 713 MGETHDR(m0, M_DONTWAIT, MT_DATA); 714 if (m0 == NULL) 715 return(ENOBUFS); 716 717 /* 718 * Initialize the NIC in test mode. This sets the chip up 719 * so that it can send and receive frames, but performs the 720 * following special functions: 721 * - Puts receiver in promiscuous mode 722 * - Enables digital loopback mode 723 * - Leaves interrupts turned off 724 */ 725 726 ifp->if_flags |= IFF_PROMISC; 727 sc->rl_testmode = 1; 728 re_init(sc); 729 re_stop(sc); 730 DELAY(100000); 731 re_init(sc); 732 733 /* Put some data in the mbuf */ 734 735 eh = mtod(m0, struct ether_header *); 736 bcopy ((char *)&dst, eh->ether_dhost, ETHER_ADDR_LEN); 737 bcopy ((char *)&src, eh->ether_shost, ETHER_ADDR_LEN); 738 eh->ether_type = htons(ETHERTYPE_IP); 739 m0->m_pkthdr.len = m0->m_len = ETHER_MIN_LEN - ETHER_CRC_LEN; 740 741 /* 742 * Queue the packet, start transmission. 743 * Note: IF_HANDOFF() ultimately calls re_start() for us. 744 */ 745 746 CSR_WRITE_2(sc, RL_ISR, 0xFFFF); 747 IF_HANDOFF(&ifp->if_snd, m0, ifp); 748 m0 = NULL; 749 750 /* Wait for it to propagate through the chip */ 751 752 DELAY(100000); 753 for (i = 0; i < RL_TIMEOUT; i++) { 754 status = CSR_READ_2(sc, RL_ISR); 755 if ((status & (RL_ISR_TIMEOUT_EXPIRED|RL_ISR_RX_OK)) == 756 (RL_ISR_TIMEOUT_EXPIRED|RL_ISR_RX_OK)) 757 break; 758 DELAY(10); 759 } 760 761 if (i == RL_TIMEOUT) { 762 printf("re%d: diagnostic failed, failed to receive packet " 763 "in loopback mode\n", sc->rl_unit); 764 error = EIO; 765 goto done; 766 } 767 768 /* 769 * The packet should have been dumped into the first 770 * entry in the RX DMA ring. Grab it from there. 771 */ 772 773 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, 774 sc->rl_ldata.rl_rx_list_map, 775 BUS_DMASYNC_POSTREAD); 776 bus_dmamap_sync(sc->rl_ldata.rl_mtag, 777 sc->rl_ldata.rl_rx_dmamap[0], 778 BUS_DMASYNC_POSTWRITE); 779 bus_dmamap_unload(sc->rl_ldata.rl_mtag, 780 sc->rl_ldata.rl_rx_dmamap[0]); 781 782 m0 = sc->rl_ldata.rl_rx_mbuf[0]; 783 sc->rl_ldata.rl_rx_mbuf[0] = NULL; 784 eh = mtod(m0, struct ether_header *); 785 786 cur_rx = &sc->rl_ldata.rl_rx_list[0]; 787 total_len = RL_RXBYTES(cur_rx); 788 rxstat = le32toh(cur_rx->rl_cmdstat); 789 790 if (total_len != ETHER_MIN_LEN) { 791 printf("re%d: diagnostic failed, received short packet\n", 792 sc->rl_unit); 793 error = EIO; 794 goto done; 795 } 796 797 /* Test that the received packet data matches what we sent. */ 798 799 if (bcmp((char *)&eh->ether_dhost, (char *)&dst, ETHER_ADDR_LEN) || 800 bcmp((char *)&eh->ether_shost, (char *)&src, ETHER_ADDR_LEN) || 801 ntohs(eh->ether_type) != ETHERTYPE_IP) { 802 printf("re%d: WARNING, DMA FAILURE!\n", sc->rl_unit); 803 printf("re%d: expected TX data: %6D/%6D/0x%x\n", sc->rl_unit, 804 dst, ":", src, ":", ETHERTYPE_IP); 805 printf("re%d: received RX data: %6D/%6D/0x%x\n", sc->rl_unit, 806 eh->ether_dhost, ":", eh->ether_shost, ":", 807 ntohs(eh->ether_type)); 808 printf("re%d: You may have a defective 32-bit NIC plugged " 809 "into a 64-bit PCI slot.\n", sc->rl_unit); 810 printf("re%d: Please re-install the NIC in a 32-bit slot " 811 "for proper operation.\n", sc->rl_unit); 812 printf("re%d: Read the re(4) man page for more details.\n", 813 sc->rl_unit); 814 error = EIO; 815 } 816 817 done: 818 /* Turn interface off, release resources */ 819 820 sc->rl_testmode = 0; 821 ifp->if_flags &= ~IFF_PROMISC; 822 re_stop(sc); 823 if (m0 != NULL) 824 m_freem(m0); 825 826 return (error); 827 } 828 829 /* 830 * Probe for a RealTek 8139C+/8169/8110 chip. Check the PCI vendor and device 831 * IDs against our list and return a device name if we find a match. 832 */ 833 static int 834 re_probe(dev) 835 device_t dev; 836 { 837 struct rl_type *t; 838 struct rl_softc *sc; 839 int rid; 840 u_int32_t hwrev; 841 842 t = re_devs; 843 sc = device_get_softc(dev); 844 845 while(t->rl_name != NULL) { 846 if ((pci_get_vendor(dev) == t->rl_vid) && 847 (pci_get_device(dev) == t->rl_did)) { 848 849 /* 850 * Temporarily map the I/O space 851 * so we can read the chip ID register. 852 */ 853 rid = RL_RID; 854 sc->rl_res = bus_alloc_resource_any(dev, RL_RES, &rid, 855 RF_ACTIVE); 856 if (sc->rl_res == NULL) { 857 device_printf(dev, 858 "couldn't map ports/memory\n"); 859 return(ENXIO); 860 } 861 sc->rl_btag = rman_get_bustag(sc->rl_res); 862 sc->rl_bhandle = rman_get_bushandle(sc->rl_res); 863 mtx_init(&sc->rl_mtx, 864 device_get_nameunit(dev), 865 MTX_NETWORK_LOCK, MTX_DEF); 866 RL_LOCK(sc); 867 hwrev = CSR_READ_4(sc, RL_TXCFG) & RL_TXCFG_HWREV; 868 bus_release_resource(dev, RL_RES, 869 RL_RID, sc->rl_res); 870 RL_UNLOCK(sc); 871 mtx_destroy(&sc->rl_mtx); 872 if (t->rl_basetype == hwrev) { 873 device_set_desc(dev, t->rl_name); 874 return(0); 875 } 876 } 877 t++; 878 } 879 880 return(ENXIO); 881 } 882 883 /* 884 * This routine takes the segment list provided as the result of 885 * a bus_dma_map_load() operation and assigns the addresses/lengths 886 * to RealTek DMA descriptors. This can be called either by the RX 887 * code or the TX code. In the RX case, we'll probably wind up mapping 888 * at most one segment. For the TX case, there could be any number of 889 * segments since TX packets may span multiple mbufs. In either case, 890 * if the number of segments is larger than the rl_maxsegs limit 891 * specified by the caller, we abort the mapping operation. Sadly, 892 * whoever designed the buffer mapping API did not provide a way to 893 * return an error from here, so we have to fake it a bit. 894 */ 895 896 static void 897 re_dma_map_desc(arg, segs, nseg, mapsize, error) 898 void *arg; 899 bus_dma_segment_t *segs; 900 int nseg; 901 bus_size_t mapsize; 902 int error; 903 { 904 struct rl_dmaload_arg *ctx; 905 struct rl_desc *d = NULL; 906 int i = 0, idx; 907 908 if (error) 909 return; 910 911 ctx = arg; 912 913 /* Signal error to caller if there's too many segments */ 914 if (nseg > ctx->rl_maxsegs) { 915 ctx->rl_maxsegs = 0; 916 return; 917 } 918 919 /* 920 * Map the segment array into descriptors. Note that we set the 921 * start-of-frame and end-of-frame markers for either TX or RX, but 922 * they really only have meaning in the TX case. (In the RX case, 923 * it's the chip that tells us where packets begin and end.) 924 * We also keep track of the end of the ring and set the 925 * end-of-ring bits as needed, and we set the ownership bits 926 * in all except the very first descriptor. (The caller will 927 * set this descriptor later when it start transmission or 928 * reception.) 929 */ 930 idx = ctx->rl_idx; 931 while(1) { 932 u_int32_t cmdstat; 933 d = &ctx->rl_ring[idx]; 934 if (le32toh(d->rl_cmdstat) & RL_RDESC_STAT_OWN) { 935 ctx->rl_maxsegs = 0; 936 return; 937 } 938 cmdstat = segs[i].ds_len; 939 d->rl_bufaddr_lo = htole32(RL_ADDR_LO(segs[i].ds_addr)); 940 d->rl_bufaddr_hi = htole32(RL_ADDR_HI(segs[i].ds_addr)); 941 if (i == 0) 942 cmdstat |= RL_TDESC_CMD_SOF; 943 else 944 cmdstat |= RL_TDESC_CMD_OWN; 945 if (idx == (RL_RX_DESC_CNT - 1)) 946 cmdstat |= RL_TDESC_CMD_EOR; 947 d->rl_cmdstat = htole32(cmdstat | ctx->rl_flags); 948 i++; 949 if (i == nseg) 950 break; 951 RL_DESC_INC(idx); 952 } 953 954 d->rl_cmdstat |= htole32(RL_TDESC_CMD_EOF); 955 ctx->rl_maxsegs = nseg; 956 ctx->rl_idx = idx; 957 958 return; 959 } 960 961 /* 962 * Map a single buffer address. 963 */ 964 965 static void 966 re_dma_map_addr(arg, segs, nseg, error) 967 void *arg; 968 bus_dma_segment_t *segs; 969 int nseg; 970 int error; 971 { 972 u_int32_t *addr; 973 974 if (error) 975 return; 976 977 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 978 addr = arg; 979 *addr = segs->ds_addr; 980 981 return; 982 } 983 984 static int 985 re_allocmem(dev, sc) 986 device_t dev; 987 struct rl_softc *sc; 988 { 989 int error; 990 int nseg; 991 int i; 992 993 /* 994 * Allocate map for RX mbufs. 995 */ 996 nseg = 32; 997 error = bus_dma_tag_create(sc->rl_parent_tag, ETHER_ALIGN, 0, 998 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, 999 NULL, MCLBYTES * nseg, nseg, MCLBYTES, BUS_DMA_ALLOCNOW, 1000 NULL, NULL, &sc->rl_ldata.rl_mtag); 1001 if (error) { 1002 device_printf(dev, "could not allocate dma tag\n"); 1003 return (ENOMEM); 1004 } 1005 1006 /* 1007 * Allocate map for TX descriptor list. 1008 */ 1009 error = bus_dma_tag_create(sc->rl_parent_tag, RL_RING_ALIGN, 1010 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, 1011 NULL, RL_TX_LIST_SZ, 1, RL_TX_LIST_SZ, BUS_DMA_ALLOCNOW, 1012 NULL, NULL, &sc->rl_ldata.rl_tx_list_tag); 1013 if (error) { 1014 device_printf(dev, "could not allocate dma tag\n"); 1015 return (ENOMEM); 1016 } 1017 1018 /* Allocate DMA'able memory for the TX ring */ 1019 1020 error = bus_dmamem_alloc(sc->rl_ldata.rl_tx_list_tag, 1021 (void **)&sc->rl_ldata.rl_tx_list, BUS_DMA_NOWAIT | BUS_DMA_ZERO, 1022 &sc->rl_ldata.rl_tx_list_map); 1023 if (error) 1024 return (ENOMEM); 1025 1026 /* Load the map for the TX ring. */ 1027 1028 error = bus_dmamap_load(sc->rl_ldata.rl_tx_list_tag, 1029 sc->rl_ldata.rl_tx_list_map, sc->rl_ldata.rl_tx_list, 1030 RL_TX_LIST_SZ, re_dma_map_addr, 1031 &sc->rl_ldata.rl_tx_list_addr, BUS_DMA_NOWAIT); 1032 1033 /* Create DMA maps for TX buffers */ 1034 1035 for (i = 0; i < RL_TX_DESC_CNT; i++) { 1036 error = bus_dmamap_create(sc->rl_ldata.rl_mtag, 0, 1037 &sc->rl_ldata.rl_tx_dmamap[i]); 1038 if (error) { 1039 device_printf(dev, "can't create DMA map for TX\n"); 1040 return(ENOMEM); 1041 } 1042 } 1043 1044 /* 1045 * Allocate map for RX descriptor list. 1046 */ 1047 error = bus_dma_tag_create(sc->rl_parent_tag, RL_RING_ALIGN, 1048 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, 1049 NULL, RL_TX_LIST_SZ, 1, RL_TX_LIST_SZ, BUS_DMA_ALLOCNOW, 1050 NULL, NULL, &sc->rl_ldata.rl_rx_list_tag); 1051 if (error) { 1052 device_printf(dev, "could not allocate dma tag\n"); 1053 return (ENOMEM); 1054 } 1055 1056 /* Allocate DMA'able memory for the RX ring */ 1057 1058 error = bus_dmamem_alloc(sc->rl_ldata.rl_rx_list_tag, 1059 (void **)&sc->rl_ldata.rl_rx_list, BUS_DMA_NOWAIT | BUS_DMA_ZERO, 1060 &sc->rl_ldata.rl_rx_list_map); 1061 if (error) 1062 return (ENOMEM); 1063 1064 /* Load the map for the RX ring. */ 1065 1066 error = bus_dmamap_load(sc->rl_ldata.rl_rx_list_tag, 1067 sc->rl_ldata.rl_rx_list_map, sc->rl_ldata.rl_rx_list, 1068 RL_TX_LIST_SZ, re_dma_map_addr, 1069 &sc->rl_ldata.rl_rx_list_addr, BUS_DMA_NOWAIT); 1070 1071 /* Create DMA maps for RX buffers */ 1072 1073 for (i = 0; i < RL_RX_DESC_CNT; i++) { 1074 error = bus_dmamap_create(sc->rl_ldata.rl_mtag, 0, 1075 &sc->rl_ldata.rl_rx_dmamap[i]); 1076 if (error) { 1077 device_printf(dev, "can't create DMA map for RX\n"); 1078 return(ENOMEM); 1079 } 1080 } 1081 1082 return(0); 1083 } 1084 1085 /* 1086 * Attach the interface. Allocate softc structures, do ifmedia 1087 * setup and ethernet/BPF attach. 1088 */ 1089 static int 1090 re_attach(dev) 1091 device_t dev; 1092 { 1093 u_char eaddr[ETHER_ADDR_LEN]; 1094 u_int16_t as[3]; 1095 struct rl_softc *sc; 1096 struct ifnet *ifp; 1097 struct rl_hwrev *hw_rev; 1098 int hwrev; 1099 u_int16_t re_did = 0; 1100 int unit, error = 0, rid, i; 1101 1102 sc = device_get_softc(dev); 1103 unit = device_get_unit(dev); 1104 1105 mtx_init(&sc->rl_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 1106 MTX_DEF | MTX_RECURSE); 1107 #ifndef BURN_BRIDGES 1108 /* 1109 * Handle power management nonsense. 1110 */ 1111 1112 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 1113 u_int32_t iobase, membase, irq; 1114 1115 /* Save important PCI config data. */ 1116 iobase = pci_read_config(dev, RL_PCI_LOIO, 4); 1117 membase = pci_read_config(dev, RL_PCI_LOMEM, 4); 1118 irq = pci_read_config(dev, RL_PCI_INTLINE, 4); 1119 1120 /* Reset the power state. */ 1121 printf("re%d: chip is is in D%d power mode " 1122 "-- setting to D0\n", unit, 1123 pci_get_powerstate(dev)); 1124 1125 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 1126 1127 /* Restore PCI config data. */ 1128 pci_write_config(dev, RL_PCI_LOIO, iobase, 4); 1129 pci_write_config(dev, RL_PCI_LOMEM, membase, 4); 1130 pci_write_config(dev, RL_PCI_INTLINE, irq, 4); 1131 } 1132 #endif 1133 /* 1134 * Map control/status registers. 1135 */ 1136 pci_enable_busmaster(dev); 1137 1138 rid = RL_RID; 1139 sc->rl_res = bus_alloc_resource_any(dev, RL_RES, &rid, 1140 RF_ACTIVE); 1141 1142 if (sc->rl_res == NULL) { 1143 printf ("re%d: couldn't map ports/memory\n", unit); 1144 error = ENXIO; 1145 goto fail; 1146 } 1147 1148 sc->rl_btag = rman_get_bustag(sc->rl_res); 1149 sc->rl_bhandle = rman_get_bushandle(sc->rl_res); 1150 1151 /* Allocate interrupt */ 1152 rid = 0; 1153 sc->rl_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 1154 RF_SHAREABLE | RF_ACTIVE); 1155 1156 if (sc->rl_irq == NULL) { 1157 printf("re%d: couldn't map interrupt\n", unit); 1158 error = ENXIO; 1159 goto fail; 1160 } 1161 1162 /* Reset the adapter. */ 1163 re_reset(sc); 1164 1165 hw_rev = re_hwrevs; 1166 hwrev = CSR_READ_4(sc, RL_TXCFG) & RL_TXCFG_HWREV; 1167 while (hw_rev->rl_desc != NULL) { 1168 if (hw_rev->rl_rev == hwrev) { 1169 sc->rl_type = hw_rev->rl_type; 1170 break; 1171 } 1172 hw_rev++; 1173 } 1174 1175 if (sc->rl_type == RL_8169) { 1176 1177 /* Set RX length mask */ 1178 1179 sc->rl_rxlenmask = RL_RDESC_STAT_GFRAGLEN; 1180 1181 /* Force station address autoload from the EEPROM */ 1182 1183 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_AUTOLOAD); 1184 for (i = 0; i < RL_TIMEOUT; i++) { 1185 if (!(CSR_READ_1(sc, RL_EECMD) & RL_EEMODE_AUTOLOAD)) 1186 break; 1187 DELAY(100); 1188 } 1189 if (i == RL_TIMEOUT) 1190 printf ("re%d: eeprom autoload timed out\n", unit); 1191 1192 for (i = 0; i < ETHER_ADDR_LEN; i++) 1193 eaddr[i] = CSR_READ_1(sc, RL_IDR0 + i); 1194 } else { 1195 1196 /* Set RX length mask */ 1197 1198 sc->rl_rxlenmask = RL_RDESC_STAT_FRAGLEN; 1199 1200 sc->rl_eecmd_read = RL_EECMD_READ_6BIT; 1201 re_read_eeprom(sc, (caddr_t)&re_did, 0, 1, 0); 1202 if (re_did != 0x8129) 1203 sc->rl_eecmd_read = RL_EECMD_READ_8BIT; 1204 1205 /* 1206 * Get station address from the EEPROM. 1207 */ 1208 re_read_eeprom(sc, (caddr_t)as, RL_EE_EADDR, 3, 0); 1209 for (i = 0; i < 3; i++) { 1210 eaddr[(i * 2) + 0] = as[i] & 0xff; 1211 eaddr[(i * 2) + 1] = as[i] >> 8; 1212 } 1213 } 1214 1215 sc->rl_unit = unit; 1216 bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN); 1217 1218 /* 1219 * Allocate the parent bus DMA tag appropriate for PCI. 1220 */ 1221 #define RL_NSEG_NEW 32 1222 error = bus_dma_tag_create(NULL, /* parent */ 1223 1, 0, /* alignment, boundary */ 1224 BUS_SPACE_MAXADDR_32BIT,/* lowaddr */ 1225 BUS_SPACE_MAXADDR, /* highaddr */ 1226 NULL, NULL, /* filter, filterarg */ 1227 MAXBSIZE, RL_NSEG_NEW, /* maxsize, nsegments */ 1228 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */ 1229 BUS_DMA_ALLOCNOW, /* flags */ 1230 NULL, NULL, /* lockfunc, lockarg */ 1231 &sc->rl_parent_tag); 1232 if (error) 1233 goto fail; 1234 1235 error = re_allocmem(dev, sc); 1236 1237 if (error) 1238 goto fail; 1239 1240 /* Do MII setup */ 1241 if (mii_phy_probe(dev, &sc->rl_miibus, 1242 re_ifmedia_upd, re_ifmedia_sts)) { 1243 printf("re%d: MII without any phy!\n", sc->rl_unit); 1244 error = ENXIO; 1245 goto fail; 1246 } 1247 1248 ifp = &sc->arpcom.ac_if; 1249 ifp->if_softc = sc; 1250 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 1251 ifp->if_mtu = ETHERMTU; 1252 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 1253 ifp->if_ioctl = re_ioctl; 1254 ifp->if_capabilities = IFCAP_VLAN_MTU; 1255 ifp->if_start = re_start; 1256 ifp->if_hwassist = RE_CSUM_FEATURES; 1257 ifp->if_capabilities |= IFCAP_HWCSUM|IFCAP_VLAN_HWTAGGING; 1258 #ifdef DEVICE_POLLING 1259 ifp->if_capabilities |= IFCAP_POLLING; 1260 #endif 1261 ifp->if_watchdog = re_watchdog; 1262 ifp->if_init = re_init; 1263 if (sc->rl_type == RL_8169) 1264 ifp->if_baudrate = 1000000000; 1265 else 1266 ifp->if_baudrate = 100000000; 1267 ifp->if_snd.ifq_maxlen = RL_IFQ_MAXLEN; 1268 ifp->if_capenable = ifp->if_capabilities; 1269 1270 callout_handle_init(&sc->rl_stat_ch); 1271 1272 /* 1273 * Call MI attach routine. 1274 */ 1275 ether_ifattach(ifp, eaddr); 1276 1277 /* Perform hardware diagnostic. */ 1278 error = re_diag(sc); 1279 1280 if (error) { 1281 printf("re%d: attach aborted due to hardware diag failure\n", 1282 unit); 1283 ether_ifdetach(ifp); 1284 goto fail; 1285 } 1286 1287 /* Hook interrupt last to avoid having to lock softc */ 1288 error = bus_setup_intr(dev, sc->rl_irq, INTR_TYPE_NET, 1289 re_intr, sc, &sc->rl_intrhand); 1290 1291 if (error) { 1292 printf("re%d: couldn't set up irq\n", unit); 1293 ether_ifdetach(ifp); 1294 goto fail; 1295 } 1296 1297 fail: 1298 if (error) 1299 re_detach(dev); 1300 1301 return (error); 1302 } 1303 1304 /* 1305 * Shutdown hardware and free up resources. This can be called any 1306 * time after the mutex has been initialized. It is called in both 1307 * the error case in attach and the normal detach case so it needs 1308 * to be careful about only freeing resources that have actually been 1309 * allocated. 1310 */ 1311 static int 1312 re_detach(dev) 1313 device_t dev; 1314 { 1315 struct rl_softc *sc; 1316 struct ifnet *ifp; 1317 int i; 1318 1319 sc = device_get_softc(dev); 1320 KASSERT(mtx_initialized(&sc->rl_mtx), ("rl mutex not initialized")); 1321 RL_LOCK(sc); 1322 ifp = &sc->arpcom.ac_if; 1323 1324 /* These should only be active if attach succeeded */ 1325 if (device_is_attached(dev)) { 1326 re_stop(sc); 1327 /* 1328 * Force off the IFF_UP flag here, in case someone 1329 * still had a BPF descriptor attached to this 1330 * interface. If they do, ether_ifattach() will cause 1331 * the BPF code to try and clear the promisc mode 1332 * flag, which will bubble down to re_ioctl(), 1333 * which will try to call re_init() again. This will 1334 * turn the NIC back on and restart the MII ticker, 1335 * which will panic the system when the kernel tries 1336 * to invoke the re_tick() function that isn't there 1337 * anymore. 1338 */ 1339 ifp->if_flags &= ~IFF_UP; 1340 ether_ifdetach(ifp); 1341 } 1342 if (sc->rl_miibus) 1343 device_delete_child(dev, sc->rl_miibus); 1344 bus_generic_detach(dev); 1345 1346 if (sc->rl_intrhand) 1347 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand); 1348 if (sc->rl_irq) 1349 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq); 1350 if (sc->rl_res) 1351 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 1352 1353 1354 /* Unload and free the RX DMA ring memory and map */ 1355 1356 if (sc->rl_ldata.rl_rx_list_tag) { 1357 bus_dmamap_unload(sc->rl_ldata.rl_rx_list_tag, 1358 sc->rl_ldata.rl_rx_list_map); 1359 bus_dmamem_free(sc->rl_ldata.rl_rx_list_tag, 1360 sc->rl_ldata.rl_rx_list, 1361 sc->rl_ldata.rl_rx_list_map); 1362 bus_dma_tag_destroy(sc->rl_ldata.rl_rx_list_tag); 1363 } 1364 1365 /* Unload and free the TX DMA ring memory and map */ 1366 1367 if (sc->rl_ldata.rl_tx_list_tag) { 1368 bus_dmamap_unload(sc->rl_ldata.rl_tx_list_tag, 1369 sc->rl_ldata.rl_tx_list_map); 1370 bus_dmamem_free(sc->rl_ldata.rl_tx_list_tag, 1371 sc->rl_ldata.rl_tx_list, 1372 sc->rl_ldata.rl_tx_list_map); 1373 bus_dma_tag_destroy(sc->rl_ldata.rl_tx_list_tag); 1374 } 1375 1376 /* Destroy all the RX and TX buffer maps */ 1377 1378 if (sc->rl_ldata.rl_mtag) { 1379 for (i = 0; i < RL_TX_DESC_CNT; i++) 1380 bus_dmamap_destroy(sc->rl_ldata.rl_mtag, 1381 sc->rl_ldata.rl_tx_dmamap[i]); 1382 for (i = 0; i < RL_RX_DESC_CNT; i++) 1383 bus_dmamap_destroy(sc->rl_ldata.rl_mtag, 1384 sc->rl_ldata.rl_rx_dmamap[i]); 1385 bus_dma_tag_destroy(sc->rl_ldata.rl_mtag); 1386 } 1387 1388 /* Unload and free the stats buffer and map */ 1389 1390 if (sc->rl_ldata.rl_stag) { 1391 bus_dmamap_unload(sc->rl_ldata.rl_stag, 1392 sc->rl_ldata.rl_rx_list_map); 1393 bus_dmamem_free(sc->rl_ldata.rl_stag, 1394 sc->rl_ldata.rl_stats, 1395 sc->rl_ldata.rl_smap); 1396 bus_dma_tag_destroy(sc->rl_ldata.rl_stag); 1397 } 1398 1399 if (sc->rl_parent_tag) 1400 bus_dma_tag_destroy(sc->rl_parent_tag); 1401 1402 RL_UNLOCK(sc); 1403 mtx_destroy(&sc->rl_mtx); 1404 1405 return(0); 1406 } 1407 1408 static int 1409 re_newbuf(sc, idx, m) 1410 struct rl_softc *sc; 1411 int idx; 1412 struct mbuf *m; 1413 { 1414 struct rl_dmaload_arg arg; 1415 struct mbuf *n = NULL; 1416 int error; 1417 1418 if (m == NULL) { 1419 n = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1420 if (n == NULL) 1421 return(ENOBUFS); 1422 m = n; 1423 } else 1424 m->m_data = m->m_ext.ext_buf; 1425 1426 /* 1427 * Initialize mbuf length fields and fixup 1428 * alignment so that the frame payload is 1429 * longword aligned. 1430 */ 1431 m->m_len = m->m_pkthdr.len = MCLBYTES; 1432 m_adj(m, ETHER_ALIGN); 1433 1434 arg.sc = sc; 1435 arg.rl_idx = idx; 1436 arg.rl_maxsegs = 1; 1437 arg.rl_flags = 0; 1438 arg.rl_ring = sc->rl_ldata.rl_rx_list; 1439 1440 error = bus_dmamap_load_mbuf(sc->rl_ldata.rl_mtag, 1441 sc->rl_ldata.rl_rx_dmamap[idx], m, re_dma_map_desc, 1442 &arg, BUS_DMA_NOWAIT); 1443 if (error || arg.rl_maxsegs != 1) { 1444 if (n != NULL) 1445 m_freem(n); 1446 return (ENOMEM); 1447 } 1448 1449 sc->rl_ldata.rl_rx_list[idx].rl_cmdstat |= htole32(RL_RDESC_CMD_OWN); 1450 sc->rl_ldata.rl_rx_mbuf[idx] = m; 1451 1452 bus_dmamap_sync(sc->rl_ldata.rl_mtag, 1453 sc->rl_ldata.rl_rx_dmamap[idx], 1454 BUS_DMASYNC_PREREAD); 1455 1456 return(0); 1457 } 1458 1459 static int 1460 re_tx_list_init(sc) 1461 struct rl_softc *sc; 1462 { 1463 bzero ((char *)sc->rl_ldata.rl_tx_list, RL_TX_LIST_SZ); 1464 bzero ((char *)&sc->rl_ldata.rl_tx_mbuf, 1465 (RL_TX_DESC_CNT * sizeof(struct mbuf *))); 1466 1467 bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag, 1468 sc->rl_ldata.rl_tx_list_map, BUS_DMASYNC_PREWRITE); 1469 sc->rl_ldata.rl_tx_prodidx = 0; 1470 sc->rl_ldata.rl_tx_considx = 0; 1471 sc->rl_ldata.rl_tx_free = RL_TX_DESC_CNT; 1472 1473 return(0); 1474 } 1475 1476 static int 1477 re_rx_list_init(sc) 1478 struct rl_softc *sc; 1479 { 1480 int i; 1481 1482 bzero ((char *)sc->rl_ldata.rl_rx_list, RL_RX_LIST_SZ); 1483 bzero ((char *)&sc->rl_ldata.rl_rx_mbuf, 1484 (RL_RX_DESC_CNT * sizeof(struct mbuf *))); 1485 1486 for (i = 0; i < RL_RX_DESC_CNT; i++) { 1487 if (re_newbuf(sc, i, NULL) == ENOBUFS) 1488 return(ENOBUFS); 1489 } 1490 1491 /* Flush the RX descriptors */ 1492 1493 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, 1494 sc->rl_ldata.rl_rx_list_map, 1495 BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD); 1496 1497 sc->rl_ldata.rl_rx_prodidx = 0; 1498 sc->rl_head = sc->rl_tail = NULL; 1499 1500 return(0); 1501 } 1502 1503 /* 1504 * RX handler for C+ and 8169. For the gigE chips, we support 1505 * the reception of jumbo frames that have been fragmented 1506 * across multiple 2K mbuf cluster buffers. 1507 */ 1508 static void 1509 re_rxeof(sc) 1510 struct rl_softc *sc; 1511 { 1512 struct mbuf *m; 1513 struct ifnet *ifp; 1514 int i, total_len; 1515 struct rl_desc *cur_rx; 1516 u_int32_t rxstat, rxvlan; 1517 1518 RL_LOCK_ASSERT(sc); 1519 1520 ifp = &sc->arpcom.ac_if; 1521 i = sc->rl_ldata.rl_rx_prodidx; 1522 1523 /* Invalidate the descriptor memory */ 1524 1525 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, 1526 sc->rl_ldata.rl_rx_list_map, 1527 BUS_DMASYNC_POSTREAD); 1528 1529 while (!RL_OWN(&sc->rl_ldata.rl_rx_list[i])) { 1530 1531 cur_rx = &sc->rl_ldata.rl_rx_list[i]; 1532 m = sc->rl_ldata.rl_rx_mbuf[i]; 1533 total_len = RL_RXBYTES(cur_rx); 1534 rxstat = le32toh(cur_rx->rl_cmdstat); 1535 rxvlan = le32toh(cur_rx->rl_vlanctl); 1536 1537 /* Invalidate the RX mbuf and unload its map */ 1538 1539 bus_dmamap_sync(sc->rl_ldata.rl_mtag, 1540 sc->rl_ldata.rl_rx_dmamap[i], 1541 BUS_DMASYNC_POSTWRITE); 1542 bus_dmamap_unload(sc->rl_ldata.rl_mtag, 1543 sc->rl_ldata.rl_rx_dmamap[i]); 1544 1545 if (!(rxstat & RL_RDESC_STAT_EOF)) { 1546 m->m_len = MCLBYTES - ETHER_ALIGN; 1547 if (sc->rl_head == NULL) 1548 sc->rl_head = sc->rl_tail = m; 1549 else { 1550 m->m_flags &= ~M_PKTHDR; 1551 sc->rl_tail->m_next = m; 1552 sc->rl_tail = m; 1553 } 1554 re_newbuf(sc, i, NULL); 1555 RL_DESC_INC(i); 1556 continue; 1557 } 1558 1559 /* 1560 * NOTE: for the 8139C+, the frame length field 1561 * is always 12 bits in size, but for the gigE chips, 1562 * it is 13 bits (since the max RX frame length is 16K). 1563 * Unfortunately, all 32 bits in the status word 1564 * were already used, so to make room for the extra 1565 * length bit, RealTek took out the 'frame alignment 1566 * error' bit and shifted the other status bits 1567 * over one slot. The OWN, EOR, FS and LS bits are 1568 * still in the same places. We have already extracted 1569 * the frame length and checked the OWN bit, so rather 1570 * than using an alternate bit mapping, we shift the 1571 * status bits one space to the right so we can evaluate 1572 * them using the 8169 status as though it was in the 1573 * same format as that of the 8139C+. 1574 */ 1575 if (sc->rl_type == RL_8169) 1576 rxstat >>= 1; 1577 1578 if (rxstat & RL_RDESC_STAT_RXERRSUM) { 1579 ifp->if_ierrors++; 1580 /* 1581 * If this is part of a multi-fragment packet, 1582 * discard all the pieces. 1583 */ 1584 if (sc->rl_head != NULL) { 1585 m_freem(sc->rl_head); 1586 sc->rl_head = sc->rl_tail = NULL; 1587 } 1588 re_newbuf(sc, i, m); 1589 RL_DESC_INC(i); 1590 continue; 1591 } 1592 1593 /* 1594 * If allocating a replacement mbuf fails, 1595 * reload the current one. 1596 */ 1597 1598 if (re_newbuf(sc, i, NULL)) { 1599 ifp->if_ierrors++; 1600 if (sc->rl_head != NULL) { 1601 m_freem(sc->rl_head); 1602 sc->rl_head = sc->rl_tail = NULL; 1603 } 1604 re_newbuf(sc, i, m); 1605 RL_DESC_INC(i); 1606 continue; 1607 } 1608 1609 RL_DESC_INC(i); 1610 1611 if (sc->rl_head != NULL) { 1612 m->m_len = total_len % (MCLBYTES - ETHER_ALIGN); 1613 /* 1614 * Special case: if there's 4 bytes or less 1615 * in this buffer, the mbuf can be discarded: 1616 * the last 4 bytes is the CRC, which we don't 1617 * care about anyway. 1618 */ 1619 if (m->m_len <= ETHER_CRC_LEN) { 1620 sc->rl_tail->m_len -= 1621 (ETHER_CRC_LEN - m->m_len); 1622 m_freem(m); 1623 } else { 1624 m->m_len -= ETHER_CRC_LEN; 1625 m->m_flags &= ~M_PKTHDR; 1626 sc->rl_tail->m_next = m; 1627 } 1628 m = sc->rl_head; 1629 sc->rl_head = sc->rl_tail = NULL; 1630 m->m_pkthdr.len = total_len - ETHER_CRC_LEN; 1631 } else 1632 m->m_pkthdr.len = m->m_len = 1633 (total_len - ETHER_CRC_LEN); 1634 1635 ifp->if_ipackets++; 1636 m->m_pkthdr.rcvif = ifp; 1637 1638 /* Do RX checksumming if enabled */ 1639 1640 if (ifp->if_capenable & IFCAP_RXCSUM) { 1641 1642 /* Check IP header checksum */ 1643 if (rxstat & RL_RDESC_STAT_PROTOID) 1644 m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED; 1645 if (!(rxstat & RL_RDESC_STAT_IPSUMBAD)) 1646 m->m_pkthdr.csum_flags |= CSUM_IP_VALID; 1647 1648 /* Check TCP/UDP checksum */ 1649 if ((RL_TCPPKT(rxstat) && 1650 !(rxstat & RL_RDESC_STAT_TCPSUMBAD)) || 1651 (RL_UDPPKT(rxstat) && 1652 !(rxstat & RL_RDESC_STAT_UDPSUMBAD))) { 1653 m->m_pkthdr.csum_flags |= 1654 CSUM_DATA_VALID|CSUM_PSEUDO_HDR; 1655 m->m_pkthdr.csum_data = 0xffff; 1656 } 1657 } 1658 1659 if (rxvlan & RL_RDESC_VLANCTL_TAG) 1660 VLAN_INPUT_TAG(ifp, m, 1661 ntohs((rxvlan & RL_RDESC_VLANCTL_DATA)), continue); 1662 RL_UNLOCK(sc); 1663 (*ifp->if_input)(ifp, m); 1664 RL_LOCK(sc); 1665 } 1666 1667 /* Flush the RX DMA ring */ 1668 1669 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, 1670 sc->rl_ldata.rl_rx_list_map, 1671 BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD); 1672 1673 sc->rl_ldata.rl_rx_prodidx = i; 1674 1675 return; 1676 } 1677 1678 static void 1679 re_txeof(sc) 1680 struct rl_softc *sc; 1681 { 1682 struct ifnet *ifp; 1683 u_int32_t txstat; 1684 int idx; 1685 1686 ifp = &sc->arpcom.ac_if; 1687 idx = sc->rl_ldata.rl_tx_considx; 1688 1689 /* Invalidate the TX descriptor list */ 1690 1691 bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag, 1692 sc->rl_ldata.rl_tx_list_map, 1693 BUS_DMASYNC_POSTREAD); 1694 1695 while (idx != sc->rl_ldata.rl_tx_prodidx) { 1696 1697 txstat = le32toh(sc->rl_ldata.rl_tx_list[idx].rl_cmdstat); 1698 if (txstat & RL_TDESC_CMD_OWN) 1699 break; 1700 1701 /* 1702 * We only stash mbufs in the last descriptor 1703 * in a fragment chain, which also happens to 1704 * be the only place where the TX status bits 1705 * are valid. 1706 */ 1707 1708 if (txstat & RL_TDESC_CMD_EOF) { 1709 m_freem(sc->rl_ldata.rl_tx_mbuf[idx]); 1710 sc->rl_ldata.rl_tx_mbuf[idx] = NULL; 1711 bus_dmamap_unload(sc->rl_ldata.rl_mtag, 1712 sc->rl_ldata.rl_tx_dmamap[idx]); 1713 if (txstat & (RL_TDESC_STAT_EXCESSCOL| 1714 RL_TDESC_STAT_COLCNT)) 1715 ifp->if_collisions++; 1716 if (txstat & RL_TDESC_STAT_TXERRSUM) 1717 ifp->if_oerrors++; 1718 else 1719 ifp->if_opackets++; 1720 } 1721 sc->rl_ldata.rl_tx_free++; 1722 RL_DESC_INC(idx); 1723 } 1724 1725 /* No changes made to the TX ring, so no flush needed */ 1726 1727 if (idx != sc->rl_ldata.rl_tx_considx) { 1728 sc->rl_ldata.rl_tx_considx = idx; 1729 ifp->if_flags &= ~IFF_OACTIVE; 1730 ifp->if_timer = 0; 1731 } 1732 1733 /* 1734 * If not all descriptors have been released reaped yet, 1735 * reload the timer so that we will eventually get another 1736 * interrupt that will cause us to re-enter this routine. 1737 * This is done in case the transmitter has gone idle. 1738 */ 1739 if (sc->rl_ldata.rl_tx_free != RL_TX_DESC_CNT) 1740 CSR_WRITE_4(sc, RL_TIMERCNT, 1); 1741 1742 return; 1743 } 1744 1745 static void 1746 re_tick(xsc) 1747 void *xsc; 1748 { 1749 struct rl_softc *sc; 1750 struct mii_data *mii; 1751 1752 sc = xsc; 1753 RL_LOCK(sc); 1754 mii = device_get_softc(sc->rl_miibus); 1755 1756 mii_tick(mii); 1757 1758 sc->rl_stat_ch = timeout(re_tick, sc, hz); 1759 RL_UNLOCK(sc); 1760 1761 return; 1762 } 1763 1764 #ifdef DEVICE_POLLING 1765 static void 1766 re_poll (struct ifnet *ifp, enum poll_cmd cmd, int count) 1767 { 1768 struct rl_softc *sc = ifp->if_softc; 1769 1770 RL_LOCK(sc); 1771 if (!(ifp->if_capenable & IFCAP_POLLING)) { 1772 ether_poll_deregister(ifp); 1773 cmd = POLL_DEREGISTER; 1774 } 1775 if (cmd == POLL_DEREGISTER) { /* final call, enable interrupts */ 1776 CSR_WRITE_2(sc, RL_IMR, RL_INTRS_CPLUS); 1777 goto done; 1778 } 1779 1780 sc->rxcycles = count; 1781 re_rxeof(sc); 1782 re_txeof(sc); 1783 1784 if (ifp->if_snd.ifq_head != NULL) 1785 (*ifp->if_start)(ifp); 1786 1787 if (cmd == POLL_AND_CHECK_STATUS) { /* also check status register */ 1788 u_int16_t status; 1789 1790 status = CSR_READ_2(sc, RL_ISR); 1791 if (status == 0xffff) 1792 goto done; 1793 if (status) 1794 CSR_WRITE_2(sc, RL_ISR, status); 1795 1796 /* 1797 * XXX check behaviour on receiver stalls. 1798 */ 1799 1800 if (status & RL_ISR_SYSTEM_ERR) { 1801 re_reset(sc); 1802 re_init(sc); 1803 } 1804 } 1805 done: 1806 RL_UNLOCK(sc); 1807 } 1808 #endif /* DEVICE_POLLING */ 1809 1810 static void 1811 re_intr(arg) 1812 void *arg; 1813 { 1814 struct rl_softc *sc; 1815 struct ifnet *ifp; 1816 u_int16_t status; 1817 1818 sc = arg; 1819 1820 if (sc->suspended) { 1821 return; 1822 } 1823 1824 RL_LOCK(sc); 1825 ifp = &sc->arpcom.ac_if; 1826 1827 if (!(ifp->if_flags & IFF_UP)) { 1828 RL_UNLOCK(sc); 1829 return; 1830 } 1831 1832 #ifdef DEVICE_POLLING 1833 if (ifp->if_flags & IFF_POLLING) 1834 goto done; 1835 if ((ifp->if_capenable & IFCAP_POLLING) && 1836 ether_poll_register(re_poll, ifp)) { /* ok, disable interrupts */ 1837 CSR_WRITE_2(sc, RL_IMR, 0x0000); 1838 re_poll(ifp, 0, 1); 1839 goto done; 1840 } 1841 #endif /* DEVICE_POLLING */ 1842 1843 for (;;) { 1844 1845 status = CSR_READ_2(sc, RL_ISR); 1846 /* If the card has gone away the read returns 0xffff. */ 1847 if (status == 0xffff) 1848 break; 1849 if (status) 1850 CSR_WRITE_2(sc, RL_ISR, status); 1851 1852 if ((status & RL_INTRS_CPLUS) == 0) 1853 break; 1854 1855 if (status & RL_ISR_RX_OK) 1856 re_rxeof(sc); 1857 1858 if (status & RL_ISR_RX_ERR) 1859 re_rxeof(sc); 1860 1861 if ((status & RL_ISR_TIMEOUT_EXPIRED) || 1862 (status & RL_ISR_TX_ERR) || 1863 (status & RL_ISR_TX_DESC_UNAVAIL)) 1864 re_txeof(sc); 1865 1866 if (status & RL_ISR_SYSTEM_ERR) { 1867 re_reset(sc); 1868 re_init(sc); 1869 } 1870 1871 if (status & RL_ISR_LINKCHG) { 1872 untimeout(re_tick, sc, sc->rl_stat_ch); 1873 re_tick(sc); 1874 } 1875 } 1876 1877 if (ifp->if_snd.ifq_head != NULL) 1878 (*ifp->if_start)(ifp); 1879 1880 #ifdef DEVICE_POLLING 1881 done: 1882 #endif 1883 RL_UNLOCK(sc); 1884 1885 return; 1886 } 1887 1888 static int 1889 re_encap(sc, m_head, idx) 1890 struct rl_softc *sc; 1891 struct mbuf *m_head; 1892 int *idx; 1893 { 1894 struct mbuf *m_new = NULL; 1895 struct rl_dmaload_arg arg; 1896 bus_dmamap_t map; 1897 int error; 1898 struct m_tag *mtag; 1899 1900 if (sc->rl_ldata.rl_tx_free <= 4) 1901 return(EFBIG); 1902 1903 /* 1904 * Set up checksum offload. Note: checksum offload bits must 1905 * appear in all descriptors of a multi-descriptor transmit 1906 * attempt. (This is according to testing done with an 8169 1907 * chip. I'm not sure if this is a requirement or a bug.) 1908 */ 1909 1910 arg.rl_flags = 0; 1911 1912 if (m_head->m_pkthdr.csum_flags & CSUM_IP) 1913 arg.rl_flags |= RL_TDESC_CMD_IPCSUM; 1914 if (m_head->m_pkthdr.csum_flags & CSUM_TCP) 1915 arg.rl_flags |= RL_TDESC_CMD_TCPCSUM; 1916 if (m_head->m_pkthdr.csum_flags & CSUM_UDP) 1917 arg.rl_flags |= RL_TDESC_CMD_UDPCSUM; 1918 1919 arg.sc = sc; 1920 arg.rl_idx = *idx; 1921 arg.rl_maxsegs = sc->rl_ldata.rl_tx_free; 1922 if (arg.rl_maxsegs > 4) 1923 arg.rl_maxsegs -= 4; 1924 arg.rl_ring = sc->rl_ldata.rl_tx_list; 1925 1926 map = sc->rl_ldata.rl_tx_dmamap[*idx]; 1927 error = bus_dmamap_load_mbuf(sc->rl_ldata.rl_mtag, map, 1928 m_head, re_dma_map_desc, &arg, BUS_DMA_NOWAIT); 1929 1930 if (error && error != EFBIG) { 1931 printf("re%d: can't map mbuf (error %d)\n", sc->rl_unit, error); 1932 return(ENOBUFS); 1933 } 1934 1935 /* Too many segments to map, coalesce into a single mbuf */ 1936 1937 if (error || arg.rl_maxsegs == 0) { 1938 m_new = m_defrag(m_head, M_DONTWAIT); 1939 if (m_new == NULL) 1940 return(1); 1941 else 1942 m_head = m_new; 1943 1944 arg.sc = sc; 1945 arg.rl_idx = *idx; 1946 arg.rl_maxsegs = sc->rl_ldata.rl_tx_free; 1947 arg.rl_ring = sc->rl_ldata.rl_tx_list; 1948 1949 error = bus_dmamap_load_mbuf(sc->rl_ldata.rl_mtag, map, 1950 m_head, re_dma_map_desc, &arg, BUS_DMA_NOWAIT); 1951 if (error) { 1952 printf("re%d: can't map mbuf (error %d)\n", 1953 sc->rl_unit, error); 1954 return(EFBIG); 1955 } 1956 } 1957 1958 /* 1959 * Insure that the map for this transmission 1960 * is placed at the array index of the last descriptor 1961 * in this chain. 1962 */ 1963 sc->rl_ldata.rl_tx_dmamap[*idx] = 1964 sc->rl_ldata.rl_tx_dmamap[arg.rl_idx]; 1965 sc->rl_ldata.rl_tx_dmamap[arg.rl_idx] = map; 1966 1967 sc->rl_ldata.rl_tx_mbuf[arg.rl_idx] = m_head; 1968 sc->rl_ldata.rl_tx_free -= arg.rl_maxsegs; 1969 1970 /* 1971 * Set up hardware VLAN tagging. Note: vlan tag info must 1972 * appear in the first descriptor of a multi-descriptor 1973 * transmission attempt. 1974 */ 1975 1976 mtag = VLAN_OUTPUT_TAG(&sc->arpcom.ac_if, m_head); 1977 if (mtag != NULL) 1978 sc->rl_ldata.rl_tx_list[*idx].rl_vlanctl = 1979 htole32(htons(VLAN_TAG_VALUE(mtag)) | RL_TDESC_VLANCTL_TAG); 1980 1981 /* Transfer ownership of packet to the chip. */ 1982 1983 sc->rl_ldata.rl_tx_list[arg.rl_idx].rl_cmdstat |= 1984 htole32(RL_TDESC_CMD_OWN); 1985 if (*idx != arg.rl_idx) 1986 sc->rl_ldata.rl_tx_list[*idx].rl_cmdstat |= 1987 htole32(RL_TDESC_CMD_OWN); 1988 1989 RL_DESC_INC(arg.rl_idx); 1990 *idx = arg.rl_idx; 1991 1992 return(0); 1993 } 1994 1995 /* 1996 * Main transmit routine for C+ and gigE NICs. 1997 */ 1998 1999 static void 2000 re_start(ifp) 2001 struct ifnet *ifp; 2002 { 2003 struct rl_softc *sc; 2004 struct mbuf *m_head = NULL; 2005 int idx; 2006 2007 sc = ifp->if_softc; 2008 RL_LOCK(sc); 2009 2010 idx = sc->rl_ldata.rl_tx_prodidx; 2011 2012 while (sc->rl_ldata.rl_tx_mbuf[idx] == NULL) { 2013 IF_DEQUEUE(&ifp->if_snd, m_head); 2014 if (m_head == NULL) 2015 break; 2016 2017 if (re_encap(sc, m_head, &idx)) { 2018 IF_PREPEND(&ifp->if_snd, m_head); 2019 ifp->if_flags |= IFF_OACTIVE; 2020 break; 2021 } 2022 2023 /* 2024 * If there's a BPF listener, bounce a copy of this frame 2025 * to him. 2026 */ 2027 BPF_MTAP(ifp, m_head); 2028 } 2029 2030 /* Flush the TX descriptors */ 2031 2032 bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag, 2033 sc->rl_ldata.rl_tx_list_map, 2034 BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD); 2035 2036 sc->rl_ldata.rl_tx_prodidx = idx; 2037 2038 /* 2039 * RealTek put the TX poll request register in a different 2040 * location on the 8169 gigE chip. I don't know why. 2041 */ 2042 2043 if (sc->rl_type == RL_8169) 2044 CSR_WRITE_2(sc, RL_GTXSTART, RL_TXSTART_START); 2045 else 2046 CSR_WRITE_2(sc, RL_TXSTART, RL_TXSTART_START); 2047 2048 /* 2049 * Use the countdown timer for interrupt moderation. 2050 * 'TX done' interrupts are disabled. Instead, we reset the 2051 * countdown timer, which will begin counting until it hits 2052 * the value in the TIMERINT register, and then trigger an 2053 * interrupt. Each time we write to the TIMERCNT register, 2054 * the timer count is reset to 0. 2055 */ 2056 CSR_WRITE_4(sc, RL_TIMERCNT, 1); 2057 2058 RL_UNLOCK(sc); 2059 2060 /* 2061 * Set a timeout in case the chip goes out to lunch. 2062 */ 2063 ifp->if_timer = 5; 2064 2065 return; 2066 } 2067 2068 static void 2069 re_init(xsc) 2070 void *xsc; 2071 { 2072 struct rl_softc *sc = xsc; 2073 struct ifnet *ifp = &sc->arpcom.ac_if; 2074 struct mii_data *mii; 2075 u_int32_t rxcfg = 0; 2076 2077 RL_LOCK(sc); 2078 mii = device_get_softc(sc->rl_miibus); 2079 2080 /* 2081 * Cancel pending I/O and free all RX/TX buffers. 2082 */ 2083 re_stop(sc); 2084 2085 /* 2086 * Enable C+ RX and TX mode, as well as VLAN stripping and 2087 * RX checksum offload. We must configure the C+ register 2088 * before all others. 2089 */ 2090 CSR_WRITE_2(sc, RL_CPLUS_CMD, RL_CPLUSCMD_RXENB| 2091 RL_CPLUSCMD_TXENB|RL_CPLUSCMD_PCI_MRW| 2092 RL_CPLUSCMD_VLANSTRIP| 2093 (ifp->if_capenable & IFCAP_RXCSUM ? 2094 RL_CPLUSCMD_RXCSUM_ENB : 0)); 2095 2096 /* 2097 * Init our MAC address. Even though the chipset 2098 * documentation doesn't mention it, we need to enter "Config 2099 * register write enable" mode to modify the ID registers. 2100 */ 2101 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_WRITECFG); 2102 CSR_WRITE_STREAM_4(sc, RL_IDR0, 2103 *(u_int32_t *)(&sc->arpcom.ac_enaddr[0])); 2104 CSR_WRITE_STREAM_4(sc, RL_IDR4, 2105 *(u_int32_t *)(&sc->arpcom.ac_enaddr[4])); 2106 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF); 2107 2108 /* 2109 * For C+ mode, initialize the RX descriptors and mbufs. 2110 */ 2111 re_rx_list_init(sc); 2112 re_tx_list_init(sc); 2113 2114 /* 2115 * Enable transmit and receive. 2116 */ 2117 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB); 2118 2119 /* 2120 * Set the initial TX and RX configuration. 2121 */ 2122 if (sc->rl_testmode) { 2123 if (sc->rl_type == RL_8169) 2124 CSR_WRITE_4(sc, RL_TXCFG, 2125 RL_TXCFG_CONFIG|RL_LOOPTEST_ON); 2126 else 2127 CSR_WRITE_4(sc, RL_TXCFG, 2128 RL_TXCFG_CONFIG|RL_LOOPTEST_ON_CPLUS); 2129 } else 2130 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG); 2131 CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG); 2132 2133 /* Set the individual bit to receive frames for this host only. */ 2134 rxcfg = CSR_READ_4(sc, RL_RXCFG); 2135 rxcfg |= RL_RXCFG_RX_INDIV; 2136 2137 /* If we want promiscuous mode, set the allframes bit. */ 2138 if (ifp->if_flags & IFF_PROMISC) { 2139 rxcfg |= RL_RXCFG_RX_ALLPHYS; 2140 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 2141 } else { 2142 rxcfg &= ~RL_RXCFG_RX_ALLPHYS; 2143 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 2144 } 2145 2146 /* 2147 * Set capture broadcast bit to capture broadcast frames. 2148 */ 2149 if (ifp->if_flags & IFF_BROADCAST) { 2150 rxcfg |= RL_RXCFG_RX_BROAD; 2151 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 2152 } else { 2153 rxcfg &= ~RL_RXCFG_RX_BROAD; 2154 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 2155 } 2156 2157 /* 2158 * Program the multicast filter, if necessary. 2159 */ 2160 re_setmulti(sc); 2161 2162 #ifdef DEVICE_POLLING 2163 /* 2164 * Disable interrupts if we are polling. 2165 */ 2166 if (ifp->if_flags & IFF_POLLING) 2167 CSR_WRITE_2(sc, RL_IMR, 0); 2168 else /* otherwise ... */ 2169 #endif /* DEVICE_POLLING */ 2170 /* 2171 * Enable interrupts. 2172 */ 2173 if (sc->rl_testmode) 2174 CSR_WRITE_2(sc, RL_IMR, 0); 2175 else 2176 CSR_WRITE_2(sc, RL_IMR, RL_INTRS_CPLUS); 2177 2178 /* Set initial TX threshold */ 2179 sc->rl_txthresh = RL_TX_THRESH_INIT; 2180 2181 /* Start RX/TX process. */ 2182 CSR_WRITE_4(sc, RL_MISSEDPKT, 0); 2183 #ifdef notdef 2184 /* Enable receiver and transmitter. */ 2185 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB); 2186 #endif 2187 /* 2188 * Load the addresses of the RX and TX lists into the chip. 2189 */ 2190 2191 CSR_WRITE_4(sc, RL_RXLIST_ADDR_HI, 2192 RL_ADDR_HI(sc->rl_ldata.rl_rx_list_addr)); 2193 CSR_WRITE_4(sc, RL_RXLIST_ADDR_LO, 2194 RL_ADDR_LO(sc->rl_ldata.rl_rx_list_addr)); 2195 2196 CSR_WRITE_4(sc, RL_TXLIST_ADDR_HI, 2197 RL_ADDR_HI(sc->rl_ldata.rl_tx_list_addr)); 2198 CSR_WRITE_4(sc, RL_TXLIST_ADDR_LO, 2199 RL_ADDR_LO(sc->rl_ldata.rl_tx_list_addr)); 2200 2201 CSR_WRITE_1(sc, RL_EARLY_TX_THRESH, 16); 2202 2203 /* 2204 * Initialize the timer interrupt register so that 2205 * a timer interrupt will be generated once the timer 2206 * reaches a certain number of ticks. The timer is 2207 * reloaded on each transmit. This gives us TX interrupt 2208 * moderation, which dramatically improves TX frame rate. 2209 */ 2210 2211 if (sc->rl_type == RL_8169) 2212 CSR_WRITE_4(sc, RL_TIMERINT_8169, 0x800); 2213 else 2214 CSR_WRITE_4(sc, RL_TIMERINT, 0x400); 2215 2216 /* 2217 * For 8169 gigE NICs, set the max allowed RX packet 2218 * size so we can receive jumbo frames. 2219 */ 2220 if (sc->rl_type == RL_8169) 2221 CSR_WRITE_2(sc, RL_MAXRXPKTLEN, 16383); 2222 2223 if (sc->rl_testmode) { 2224 RL_UNLOCK(sc); 2225 return; 2226 } 2227 2228 mii_mediachg(mii); 2229 2230 CSR_WRITE_1(sc, RL_CFG1, RL_CFG1_DRVLOAD|RL_CFG1_FULLDUPLEX); 2231 2232 ifp->if_flags |= IFF_RUNNING; 2233 ifp->if_flags &= ~IFF_OACTIVE; 2234 2235 sc->rl_stat_ch = timeout(re_tick, sc, hz); 2236 RL_UNLOCK(sc); 2237 2238 return; 2239 } 2240 2241 /* 2242 * Set media options. 2243 */ 2244 static int 2245 re_ifmedia_upd(ifp) 2246 struct ifnet *ifp; 2247 { 2248 struct rl_softc *sc; 2249 struct mii_data *mii; 2250 2251 sc = ifp->if_softc; 2252 mii = device_get_softc(sc->rl_miibus); 2253 mii_mediachg(mii); 2254 2255 return(0); 2256 } 2257 2258 /* 2259 * Report current media status. 2260 */ 2261 static void 2262 re_ifmedia_sts(ifp, ifmr) 2263 struct ifnet *ifp; 2264 struct ifmediareq *ifmr; 2265 { 2266 struct rl_softc *sc; 2267 struct mii_data *mii; 2268 2269 sc = ifp->if_softc; 2270 mii = device_get_softc(sc->rl_miibus); 2271 2272 mii_pollstat(mii); 2273 ifmr->ifm_active = mii->mii_media_active; 2274 ifmr->ifm_status = mii->mii_media_status; 2275 2276 return; 2277 } 2278 2279 static int 2280 re_ioctl(ifp, command, data) 2281 struct ifnet *ifp; 2282 u_long command; 2283 caddr_t data; 2284 { 2285 struct rl_softc *sc = ifp->if_softc; 2286 struct ifreq *ifr = (struct ifreq *) data; 2287 struct mii_data *mii; 2288 int error = 0; 2289 2290 RL_LOCK(sc); 2291 2292 switch(command) { 2293 case SIOCSIFMTU: 2294 if (ifr->ifr_mtu > RL_JUMBO_MTU) 2295 error = EINVAL; 2296 ifp->if_mtu = ifr->ifr_mtu; 2297 break; 2298 case SIOCSIFFLAGS: 2299 if (ifp->if_flags & IFF_UP) { 2300 re_init(sc); 2301 } else { 2302 if (ifp->if_flags & IFF_RUNNING) 2303 re_stop(sc); 2304 } 2305 error = 0; 2306 break; 2307 case SIOCADDMULTI: 2308 case SIOCDELMULTI: 2309 re_setmulti(sc); 2310 error = 0; 2311 break; 2312 case SIOCGIFMEDIA: 2313 case SIOCSIFMEDIA: 2314 mii = device_get_softc(sc->rl_miibus); 2315 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 2316 break; 2317 case SIOCSIFCAP: 2318 ifp->if_capenable &= ~(IFCAP_HWCSUM | IFCAP_POLLING); 2319 ifp->if_capenable |= 2320 ifr->ifr_reqcap & (IFCAP_HWCSUM | IFCAP_POLLING); 2321 if (ifp->if_capenable & IFCAP_TXCSUM) 2322 ifp->if_hwassist = RE_CSUM_FEATURES; 2323 else 2324 ifp->if_hwassist = 0; 2325 if (ifp->if_flags & IFF_RUNNING) 2326 re_init(sc); 2327 break; 2328 default: 2329 error = ether_ioctl(ifp, command, data); 2330 break; 2331 } 2332 2333 RL_UNLOCK(sc); 2334 2335 return(error); 2336 } 2337 2338 static void 2339 re_watchdog(ifp) 2340 struct ifnet *ifp; 2341 { 2342 struct rl_softc *sc; 2343 2344 sc = ifp->if_softc; 2345 RL_LOCK(sc); 2346 printf("re%d: watchdog timeout\n", sc->rl_unit); 2347 ifp->if_oerrors++; 2348 2349 re_txeof(sc); 2350 re_rxeof(sc); 2351 2352 re_init(sc); 2353 2354 RL_UNLOCK(sc); 2355 2356 return; 2357 } 2358 2359 /* 2360 * Stop the adapter and free any mbufs allocated to the 2361 * RX and TX lists. 2362 */ 2363 static void 2364 re_stop(sc) 2365 struct rl_softc *sc; 2366 { 2367 register int i; 2368 struct ifnet *ifp; 2369 2370 RL_LOCK(sc); 2371 ifp = &sc->arpcom.ac_if; 2372 ifp->if_timer = 0; 2373 2374 untimeout(re_tick, sc, sc->rl_stat_ch); 2375 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2376 #ifdef DEVICE_POLLING 2377 ether_poll_deregister(ifp); 2378 #endif /* DEVICE_POLLING */ 2379 2380 CSR_WRITE_1(sc, RL_COMMAND, 0x00); 2381 CSR_WRITE_2(sc, RL_IMR, 0x0000); 2382 2383 if (sc->rl_head != NULL) { 2384 m_freem(sc->rl_head); 2385 sc->rl_head = sc->rl_tail = NULL; 2386 } 2387 2388 /* Free the TX list buffers. */ 2389 2390 for (i = 0; i < RL_TX_DESC_CNT; i++) { 2391 if (sc->rl_ldata.rl_tx_mbuf[i] != NULL) { 2392 bus_dmamap_unload(sc->rl_ldata.rl_mtag, 2393 sc->rl_ldata.rl_tx_dmamap[i]); 2394 m_freem(sc->rl_ldata.rl_tx_mbuf[i]); 2395 sc->rl_ldata.rl_tx_mbuf[i] = NULL; 2396 } 2397 } 2398 2399 /* Free the RX list buffers. */ 2400 2401 for (i = 0; i < RL_RX_DESC_CNT; i++) { 2402 if (sc->rl_ldata.rl_rx_mbuf[i] != NULL) { 2403 bus_dmamap_unload(sc->rl_ldata.rl_mtag, 2404 sc->rl_ldata.rl_rx_dmamap[i]); 2405 m_freem(sc->rl_ldata.rl_rx_mbuf[i]); 2406 sc->rl_ldata.rl_rx_mbuf[i] = NULL; 2407 } 2408 } 2409 2410 RL_UNLOCK(sc); 2411 return; 2412 } 2413 2414 /* 2415 * Device suspend routine. Stop the interface and save some PCI 2416 * settings in case the BIOS doesn't restore them properly on 2417 * resume. 2418 */ 2419 static int 2420 re_suspend(dev) 2421 device_t dev; 2422 { 2423 #ifndef BURN_BRIDGES 2424 register int i; 2425 #endif 2426 struct rl_softc *sc; 2427 2428 sc = device_get_softc(dev); 2429 2430 re_stop(sc); 2431 2432 #ifndef BURN_BRIDGES 2433 for (i = 0; i < 5; i++) 2434 sc->saved_maps[i] = pci_read_config(dev, PCIR_MAPS + i * 4, 4); 2435 sc->saved_biosaddr = pci_read_config(dev, PCIR_BIOS, 4); 2436 sc->saved_intline = pci_read_config(dev, PCIR_INTLINE, 1); 2437 sc->saved_cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1); 2438 sc->saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1); 2439 #endif 2440 2441 sc->suspended = 1; 2442 2443 return (0); 2444 } 2445 2446 /* 2447 * Device resume routine. Restore some PCI settings in case the BIOS 2448 * doesn't, re-enable busmastering, and restart the interface if 2449 * appropriate. 2450 */ 2451 static int 2452 re_resume(dev) 2453 device_t dev; 2454 { 2455 #ifndef BURN_BRIDGES 2456 register int i; 2457 #endif 2458 struct rl_softc *sc; 2459 struct ifnet *ifp; 2460 2461 sc = device_get_softc(dev); 2462 ifp = &sc->arpcom.ac_if; 2463 2464 #ifndef BURN_BRIDGES 2465 /* better way to do this? */ 2466 for (i = 0; i < 5; i++) 2467 pci_write_config(dev, PCIR_MAPS + i * 4, sc->saved_maps[i], 4); 2468 pci_write_config(dev, PCIR_BIOS, sc->saved_biosaddr, 4); 2469 pci_write_config(dev, PCIR_INTLINE, sc->saved_intline, 1); 2470 pci_write_config(dev, PCIR_CACHELNSZ, sc->saved_cachelnsz, 1); 2471 pci_write_config(dev, PCIR_LATTIMER, sc->saved_lattimer, 1); 2472 2473 /* reenable busmastering */ 2474 pci_enable_busmaster(dev); 2475 pci_enable_io(dev, RL_RES); 2476 #endif 2477 2478 /* reinitialize interface if necessary */ 2479 if (ifp->if_flags & IFF_UP) 2480 re_init(sc); 2481 2482 sc->suspended = 0; 2483 2484 return (0); 2485 } 2486 2487 /* 2488 * Stop all chip I/O so that the kernel's probe routines don't 2489 * get confused by errant DMAs when rebooting. 2490 */ 2491 static void 2492 re_shutdown(dev) 2493 device_t dev; 2494 { 2495 struct rl_softc *sc; 2496 2497 sc = device_get_softc(dev); 2498 2499 re_stop(sc); 2500 2501 return; 2502 } 2503