if_re.c revision 135468
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: head/sys/dev/re/if_re.c 135468 2004-09-19 17:51:41Z jmg $"); 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/module.h> 118#include <sys/kernel.h> 119#include <sys/socket.h> 120 121#include <net/if.h> 122#include <net/if_arp.h> 123#include <net/ethernet.h> 124#include <net/if_dl.h> 125#include <net/if_media.h> 126#include <net/if_vlan_var.h> 127 128#include <net/bpf.h> 129 130#include <machine/bus_pio.h> 131#include <machine/bus_memio.h> 132#include <machine/bus.h> 133#include <machine/resource.h> 134#include <sys/bus.h> 135#include <sys/rman.h> 136 137#include <dev/mii/mii.h> 138#include <dev/mii/miivar.h> 139 140#include <dev/pci/pcireg.h> 141#include <dev/pci/pcivar.h> 142 143MODULE_DEPEND(re, pci, 1, 1, 1); 144MODULE_DEPEND(re, ether, 1, 1, 1); 145MODULE_DEPEND(re, miibus, 1, 1, 1); 146 147/* "controller miibus0" required. See GENERIC if you get errors here. */ 148#include "miibus_if.h" 149 150/* 151 * Default to using PIO access for this driver. 152 */ 153#define RE_USEIOSPACE 154 155#include <pci/if_rlreg.h> 156 157#define RE_CSUM_FEATURES (CSUM_IP | CSUM_TCP | CSUM_UDP) 158 159/* 160 * Various supported device vendors/types and their names. 161 */ 162static struct rl_type re_devs[] = { 163 { RT_VENDORID, RT_DEVICEID_8139, RL_HWREV_8139CPLUS, 164 "RealTek 8139C+ 10/100BaseTX" }, 165 { RT_VENDORID, RT_DEVICEID_8169, RL_HWREV_8169, 166 "RealTek 8169 Gigabit Ethernet" }, 167 { RT_VENDORID, RT_DEVICEID_8169, RL_HWREV_8169S, 168 "RealTek 8169S Single-chip Gigabit Ethernet" }, 169 { RT_VENDORID, RT_DEVICEID_8169, RL_HWREV_8110S, 170 "RealTek 8110S Single-chip Gigabit Ethernet" }, 171 { COREGA_VENDORID, COREGA_DEVICEID_CGLAPCIGT, RL_HWREV_8169S, 172 "Corega CG-LAPCIGT (RTL8169S) Gigabit Ethernet" }, 173 { 0, 0, 0, NULL } 174}; 175 176static struct rl_hwrev re_hwrevs[] = { 177 { RL_HWREV_8139, RL_8139, "" }, 178 { RL_HWREV_8139A, RL_8139, "A" }, 179 { RL_HWREV_8139AG, RL_8139, "A-G" }, 180 { RL_HWREV_8139B, RL_8139, "B" }, 181 { RL_HWREV_8130, RL_8139, "8130" }, 182 { RL_HWREV_8139C, RL_8139, "C" }, 183 { RL_HWREV_8139D, RL_8139, "8139D/8100B/8100C" }, 184 { RL_HWREV_8139CPLUS, RL_8139CPLUS, "C+"}, 185 { RL_HWREV_8169, RL_8169, "8169"}, 186 { RL_HWREV_8169S, RL_8169, "8169S"}, 187 { RL_HWREV_8110S, RL_8169, "8110S"}, 188 { RL_HWREV_8100, RL_8139, "8100"}, 189 { RL_HWREV_8101, RL_8139, "8101"}, 190 { 0, 0, NULL } 191}; 192 193static int re_probe (device_t); 194static int re_attach (device_t); 195static int re_detach (device_t); 196 197static int re_encap (struct rl_softc *, struct mbuf **, int *); 198 199static void re_dma_map_addr (void *, bus_dma_segment_t *, int, int); 200static void re_dma_map_desc (void *, bus_dma_segment_t *, int, 201 bus_size_t, int); 202static int re_allocmem (device_t, struct rl_softc *); 203static int re_newbuf (struct rl_softc *, int, struct mbuf *); 204static int re_rx_list_init (struct rl_softc *); 205static int re_tx_list_init (struct rl_softc *); 206static void re_rxeof (struct rl_softc *); 207static void re_txeof (struct rl_softc *); 208#ifdef DEVICE_POLLING 209static void re_poll (struct ifnet *, enum poll_cmd, int); 210static void re_poll_locked (struct ifnet *, enum poll_cmd, int); 211#endif 212static void re_intr (void *); 213static void re_tick (void *); 214static void re_tick_locked (struct rl_softc *); 215static void re_start (struct ifnet *); 216static void re_start_locked (struct ifnet *); 217static int re_ioctl (struct ifnet *, u_long, caddr_t); 218static void re_init (void *); 219static void re_init_locked (struct rl_softc *); 220static void re_stop (struct rl_softc *); 221static void re_watchdog (struct ifnet *); 222static int re_suspend (device_t); 223static int re_resume (device_t); 224static void re_shutdown (device_t); 225static int re_ifmedia_upd (struct ifnet *); 226static void re_ifmedia_sts (struct ifnet *, struct ifmediareq *); 227 228static void re_eeprom_putbyte (struct rl_softc *, int); 229static void re_eeprom_getword (struct rl_softc *, int, u_int16_t *); 230static void re_read_eeprom (struct rl_softc *, caddr_t, int, int, int); 231static int re_gmii_readreg (device_t, int, int); 232static int re_gmii_writereg (device_t, int, int, int); 233 234static int re_miibus_readreg (device_t, int, int); 235static int re_miibus_writereg (device_t, int, int, int); 236static void re_miibus_statchg (device_t); 237 238static void re_setmulti (struct rl_softc *); 239static void re_reset (struct rl_softc *); 240 241static int re_diag (struct rl_softc *); 242 243#ifdef RE_USEIOSPACE 244#define RL_RES SYS_RES_IOPORT 245#define RL_RID RL_PCI_LOIO 246#else 247#define RL_RES SYS_RES_MEMORY 248#define RL_RID RL_PCI_LOMEM 249#endif 250 251static device_method_t re_methods[] = { 252 /* Device interface */ 253 DEVMETHOD(device_probe, re_probe), 254 DEVMETHOD(device_attach, re_attach), 255 DEVMETHOD(device_detach, re_detach), 256 DEVMETHOD(device_suspend, re_suspend), 257 DEVMETHOD(device_resume, re_resume), 258 DEVMETHOD(device_shutdown, re_shutdown), 259 260 /* bus interface */ 261 DEVMETHOD(bus_print_child, bus_generic_print_child), 262 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 263 264 /* MII interface */ 265 DEVMETHOD(miibus_readreg, re_miibus_readreg), 266 DEVMETHOD(miibus_writereg, re_miibus_writereg), 267 DEVMETHOD(miibus_statchg, re_miibus_statchg), 268 269 { 0, 0 } 270}; 271 272static driver_t re_driver = { 273 "re", 274 re_methods, 275 sizeof(struct rl_softc) 276}; 277 278static devclass_t re_devclass; 279 280DRIVER_MODULE(re, pci, re_driver, re_devclass, 0, 0); 281DRIVER_MODULE(re, cardbus, re_driver, re_devclass, 0, 0); 282DRIVER_MODULE(miibus, re, miibus_driver, miibus_devclass, 0, 0); 283 284#define EE_SET(x) \ 285 CSR_WRITE_1(sc, RL_EECMD, \ 286 CSR_READ_1(sc, RL_EECMD) | x) 287 288#define EE_CLR(x) \ 289 CSR_WRITE_1(sc, RL_EECMD, \ 290 CSR_READ_1(sc, RL_EECMD) & ~x) 291 292/* 293 * Send a read command and address to the EEPROM, check for ACK. 294 */ 295static void 296re_eeprom_putbyte(sc, addr) 297 struct rl_softc *sc; 298 int addr; 299{ 300 register int d, i; 301 302 d = addr | sc->rl_eecmd_read; 303 304 /* 305 * Feed in each bit and strobe the clock. 306 */ 307 for (i = 0x400; i; i >>= 1) { 308 if (d & i) { 309 EE_SET(RL_EE_DATAIN); 310 } else { 311 EE_CLR(RL_EE_DATAIN); 312 } 313 DELAY(100); 314 EE_SET(RL_EE_CLK); 315 DELAY(150); 316 EE_CLR(RL_EE_CLK); 317 DELAY(100); 318 } 319} 320 321/* 322 * Read a word of data stored in the EEPROM at address 'addr.' 323 */ 324static void 325re_eeprom_getword(sc, addr, dest) 326 struct rl_softc *sc; 327 int addr; 328 u_int16_t *dest; 329{ 330 register int i; 331 u_int16_t word = 0; 332 333 /* Enter EEPROM access mode. */ 334 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL); 335 336 /* 337 * Send address of word we want to read. 338 */ 339 re_eeprom_putbyte(sc, addr); 340 341 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL); 342 343 /* 344 * Start reading bits from EEPROM. 345 */ 346 for (i = 0x8000; i; i >>= 1) { 347 EE_SET(RL_EE_CLK); 348 DELAY(100); 349 if (CSR_READ_1(sc, RL_EECMD) & RL_EE_DATAOUT) 350 word |= i; 351 EE_CLR(RL_EE_CLK); 352 DELAY(100); 353 } 354 355 /* Turn off EEPROM access mode. */ 356 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF); 357 358 *dest = word; 359} 360 361/* 362 * Read a sequence of words from the EEPROM. 363 */ 364static void 365re_read_eeprom(sc, dest, off, cnt, swap) 366 struct rl_softc *sc; 367 caddr_t dest; 368 int off; 369 int cnt; 370 int swap; 371{ 372 int i; 373 u_int16_t word = 0, *ptr; 374 375 for (i = 0; i < cnt; i++) { 376 re_eeprom_getword(sc, off + i, &word); 377 ptr = (u_int16_t *)(dest + (i * 2)); 378 if (swap) 379 *ptr = ntohs(word); 380 else 381 *ptr = word; 382 } 383} 384 385static int 386re_gmii_readreg(dev, phy, reg) 387 device_t dev; 388 int phy, reg; 389{ 390 struct rl_softc *sc; 391 u_int32_t rval; 392 int i; 393 394 if (phy != 1) 395 return (0); 396 397 sc = device_get_softc(dev); 398 399 /* Let the rgephy driver read the GMEDIASTAT register */ 400 401 if (reg == RL_GMEDIASTAT) { 402 rval = CSR_READ_1(sc, RL_GMEDIASTAT); 403 return (rval); 404 } 405 406 CSR_WRITE_4(sc, RL_PHYAR, reg << 16); 407 DELAY(1000); 408 409 for (i = 0; i < RL_TIMEOUT; i++) { 410 rval = CSR_READ_4(sc, RL_PHYAR); 411 if (rval & RL_PHYAR_BUSY) 412 break; 413 DELAY(100); 414 } 415 416 if (i == RL_TIMEOUT) { 417 printf ("re%d: PHY read failed\n", sc->rl_unit); 418 return (0); 419 } 420 421 return (rval & RL_PHYAR_PHYDATA); 422} 423 424static int 425re_gmii_writereg(dev, phy, reg, data) 426 device_t dev; 427 int phy, reg, data; 428{ 429 struct rl_softc *sc; 430 u_int32_t rval; 431 int i; 432 433 sc = device_get_softc(dev); 434 435 CSR_WRITE_4(sc, RL_PHYAR, (reg << 16) | 436 (data & RL_PHYAR_PHYDATA) | RL_PHYAR_BUSY); 437 DELAY(1000); 438 439 for (i = 0; i < RL_TIMEOUT; i++) { 440 rval = CSR_READ_4(sc, RL_PHYAR); 441 if (!(rval & RL_PHYAR_BUSY)) 442 break; 443 DELAY(100); 444 } 445 446 if (i == RL_TIMEOUT) { 447 printf ("re%d: PHY write failed\n", sc->rl_unit); 448 return (0); 449 } 450 451 return (0); 452} 453 454static int 455re_miibus_readreg(dev, phy, reg) 456 device_t dev; 457 int phy, reg; 458{ 459 struct rl_softc *sc; 460 u_int16_t rval = 0; 461 u_int16_t re8139_reg = 0; 462 463 sc = device_get_softc(dev); 464 465 if (sc->rl_type == RL_8169) { 466 rval = re_gmii_readreg(dev, phy, reg); 467 return (rval); 468 } 469 470 /* Pretend the internal PHY is only at address 0 */ 471 if (phy) { 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 return (0); 493 /* 494 * Allow the rlphy driver to read the media status 495 * register. If we have a link partner which does not 496 * support NWAY, this is the register which will tell 497 * us the results of parallel detection. 498 */ 499 case RL_MEDIASTAT: 500 rval = CSR_READ_1(sc, RL_MEDIASTAT); 501 return (rval); 502 default: 503 printf("re%d: bad phy register\n", sc->rl_unit); 504 return (0); 505 } 506 rval = CSR_READ_2(sc, re8139_reg); 507 return (rval); 508} 509 510static int 511re_miibus_writereg(dev, phy, reg, data) 512 device_t dev; 513 int phy, reg, data; 514{ 515 struct rl_softc *sc; 516 u_int16_t re8139_reg = 0; 517 int rval = 0; 518 519 sc = device_get_softc(dev); 520 521 if (sc->rl_type == RL_8169) { 522 rval = re_gmii_writereg(dev, phy, reg, data); 523 return (rval); 524 } 525 526 /* Pretend the internal PHY is only at address 0 */ 527 if (phy) 528 return (0); 529 530 switch (reg) { 531 case MII_BMCR: 532 re8139_reg = RL_BMCR; 533 break; 534 case MII_BMSR: 535 re8139_reg = RL_BMSR; 536 break; 537 case MII_ANAR: 538 re8139_reg = RL_ANAR; 539 break; 540 case MII_ANER: 541 re8139_reg = RL_ANER; 542 break; 543 case MII_ANLPAR: 544 re8139_reg = RL_LPAR; 545 break; 546 case MII_PHYIDR1: 547 case MII_PHYIDR2: 548 return (0); 549 break; 550 default: 551 printf("re%d: bad phy register\n", sc->rl_unit); 552 return (0); 553 } 554 CSR_WRITE_2(sc, re8139_reg, data); 555 return (0); 556} 557 558static void 559re_miibus_statchg(dev) 560 device_t dev; 561{ 562 563} 564 565/* 566 * Program the 64-bit multicast hash filter. 567 */ 568static void 569re_setmulti(sc) 570 struct rl_softc *sc; 571{ 572 struct ifnet *ifp; 573 int h = 0; 574 u_int32_t hashes[2] = { 0, 0 }; 575 struct ifmultiaddr *ifma; 576 u_int32_t rxfilt; 577 int mcnt = 0; 578 579 RL_LOCK_ASSERT(sc); 580 581 ifp = &sc->arpcom.ac_if; 582 583 rxfilt = CSR_READ_4(sc, RL_RXCFG); 584 585 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { 586 rxfilt |= RL_RXCFG_RX_MULTI; 587 CSR_WRITE_4(sc, RL_RXCFG, rxfilt); 588 CSR_WRITE_4(sc, RL_MAR0, 0xFFFFFFFF); 589 CSR_WRITE_4(sc, RL_MAR4, 0xFFFFFFFF); 590 return; 591 } 592 593 /* first, zot all the existing hash bits */ 594 CSR_WRITE_4(sc, RL_MAR0, 0); 595 CSR_WRITE_4(sc, RL_MAR4, 0); 596 597 /* now program new ones */ 598 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 599 if (ifma->ifma_addr->sa_family != AF_LINK) 600 continue; 601 h = ether_crc32_be(LLADDR((struct sockaddr_dl *) 602 ifma->ifma_addr), ETHER_ADDR_LEN) >> 26; 603 if (h < 32) 604 hashes[0] |= (1 << h); 605 else 606 hashes[1] |= (1 << (h - 32)); 607 mcnt++; 608 } 609 610 if (mcnt) 611 rxfilt |= RL_RXCFG_RX_MULTI; 612 else 613 rxfilt &= ~RL_RXCFG_RX_MULTI; 614 615 CSR_WRITE_4(sc, RL_RXCFG, rxfilt); 616 CSR_WRITE_4(sc, RL_MAR0, hashes[0]); 617 CSR_WRITE_4(sc, RL_MAR4, hashes[1]); 618} 619 620static void 621re_reset(sc) 622 struct rl_softc *sc; 623{ 624 register int i; 625 626 RL_LOCK_ASSERT(sc); 627 628 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_RESET); 629 630 for (i = 0; i < RL_TIMEOUT; i++) { 631 DELAY(10); 632 if (!(CSR_READ_1(sc, RL_COMMAND) & RL_CMD_RESET)) 633 break; 634 } 635 if (i == RL_TIMEOUT) 636 printf("re%d: reset never completed!\n", sc->rl_unit); 637 638 CSR_WRITE_1(sc, 0x82, 1); 639} 640 641/* 642 * The following routine is designed to test for a defect on some 643 * 32-bit 8169 cards. Some of these NICs have the REQ64# and ACK64# 644 * lines connected to the bus, however for a 32-bit only card, they 645 * should be pulled high. The result of this defect is that the 646 * NIC will not work right if you plug it into a 64-bit slot: DMA 647 * operations will be done with 64-bit transfers, which will fail 648 * because the 64-bit data lines aren't connected. 649 * 650 * There's no way to work around this (short of talking a soldering 651 * iron to the board), however we can detect it. The method we use 652 * here is to put the NIC into digital loopback mode, set the receiver 653 * to promiscuous mode, and then try to send a frame. We then compare 654 * the frame data we sent to what was received. If the data matches, 655 * then the NIC is working correctly, otherwise we know the user has 656 * a defective NIC which has been mistakenly plugged into a 64-bit PCI 657 * slot. In the latter case, there's no way the NIC can work correctly, 658 * so we print out a message on the console and abort the device attach. 659 */ 660 661static int 662re_diag(sc) 663 struct rl_softc *sc; 664{ 665 struct ifnet *ifp = &sc->arpcom.ac_if; 666 struct mbuf *m0; 667 struct ether_header *eh; 668 struct rl_desc *cur_rx; 669 u_int16_t status; 670 u_int32_t rxstat; 671 int total_len, i, error = 0; 672 u_int8_t dst[] = { 0x00, 'h', 'e', 'l', 'l', 'o' }; 673 u_int8_t src[] = { 0x00, 'w', 'o', 'r', 'l', 'd' }; 674 675 /* Allocate a single mbuf */ 676 MGETHDR(m0, M_DONTWAIT, MT_DATA); 677 if (m0 == NULL) 678 return (ENOBUFS); 679 680 RL_LOCK(sc); 681 682 /* 683 * Initialize the NIC in test mode. This sets the chip up 684 * so that it can send and receive frames, but performs the 685 * following special functions: 686 * - Puts receiver in promiscuous mode 687 * - Enables digital loopback mode 688 * - Leaves interrupts turned off 689 */ 690 691 ifp->if_flags |= IFF_PROMISC; 692 sc->rl_testmode = 1; 693 re_init_locked(sc); 694 re_stop(sc); 695 DELAY(100000); 696 re_init_locked(sc); 697 698 /* Put some data in the mbuf */ 699 700 eh = mtod(m0, struct ether_header *); 701 bcopy ((char *)&dst, eh->ether_dhost, ETHER_ADDR_LEN); 702 bcopy ((char *)&src, eh->ether_shost, ETHER_ADDR_LEN); 703 eh->ether_type = htons(ETHERTYPE_IP); 704 m0->m_pkthdr.len = m0->m_len = ETHER_MIN_LEN - ETHER_CRC_LEN; 705 706 /* 707 * Queue the packet, start transmission. 708 * Note: IF_HANDOFF() ultimately calls re_start() for us. 709 */ 710 711 CSR_WRITE_2(sc, RL_ISR, 0xFFFF); 712 RL_UNLOCK(sc); 713 IF_HANDOFF(&ifp->if_snd, m0, ifp); 714 RL_LOCK(sc); 715 m0 = NULL; 716 717 /* Wait for it to propagate through the chip */ 718 719 DELAY(100000); 720 for (i = 0; i < RL_TIMEOUT; i++) { 721 status = CSR_READ_2(sc, RL_ISR); 722 if ((status & (RL_ISR_TIMEOUT_EXPIRED|RL_ISR_RX_OK)) == 723 (RL_ISR_TIMEOUT_EXPIRED|RL_ISR_RX_OK)) 724 break; 725 DELAY(10); 726 } 727 728 if (i == RL_TIMEOUT) { 729 printf("re%d: diagnostic failed, failed to receive packet " 730 "in loopback mode\n", sc->rl_unit); 731 error = EIO; 732 goto done; 733 } 734 735 /* 736 * The packet should have been dumped into the first 737 * entry in the RX DMA ring. Grab it from there. 738 */ 739 740 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, 741 sc->rl_ldata.rl_rx_list_map, 742 BUS_DMASYNC_POSTREAD); 743 bus_dmamap_sync(sc->rl_ldata.rl_mtag, 744 sc->rl_ldata.rl_rx_dmamap[0], 745 BUS_DMASYNC_POSTWRITE); 746 bus_dmamap_unload(sc->rl_ldata.rl_mtag, 747 sc->rl_ldata.rl_rx_dmamap[0]); 748 749 m0 = sc->rl_ldata.rl_rx_mbuf[0]; 750 sc->rl_ldata.rl_rx_mbuf[0] = NULL; 751 eh = mtod(m0, struct ether_header *); 752 753 cur_rx = &sc->rl_ldata.rl_rx_list[0]; 754 total_len = RL_RXBYTES(cur_rx); 755 rxstat = le32toh(cur_rx->rl_cmdstat); 756 757 if (total_len != ETHER_MIN_LEN) { 758 printf("re%d: diagnostic failed, received short packet\n", 759 sc->rl_unit); 760 error = EIO; 761 goto done; 762 } 763 764 /* Test that the received packet data matches what we sent. */ 765 766 if (bcmp((char *)&eh->ether_dhost, (char *)&dst, ETHER_ADDR_LEN) || 767 bcmp((char *)&eh->ether_shost, (char *)&src, ETHER_ADDR_LEN) || 768 ntohs(eh->ether_type) != ETHERTYPE_IP) { 769 printf("re%d: WARNING, DMA FAILURE!\n", sc->rl_unit); 770 printf("re%d: expected TX data: %6D/%6D/0x%x\n", sc->rl_unit, 771 dst, ":", src, ":", ETHERTYPE_IP); 772 printf("re%d: received RX data: %6D/%6D/0x%x\n", sc->rl_unit, 773 eh->ether_dhost, ":", eh->ether_shost, ":", 774 ntohs(eh->ether_type)); 775 printf("re%d: You may have a defective 32-bit NIC plugged " 776 "into a 64-bit PCI slot.\n", sc->rl_unit); 777 printf("re%d: Please re-install the NIC in a 32-bit slot " 778 "for proper operation.\n", sc->rl_unit); 779 printf("re%d: Read the re(4) man page for more details.\n", 780 sc->rl_unit); 781 error = EIO; 782 } 783 784done: 785 /* Turn interface off, release resources */ 786 787 sc->rl_testmode = 0; 788 ifp->if_flags &= ~IFF_PROMISC; 789 re_stop(sc); 790 if (m0 != NULL) 791 m_freem(m0); 792 793 RL_UNLOCK(sc); 794 795 return (error); 796} 797 798/* 799 * Probe for a RealTek 8139C+/8169/8110 chip. Check the PCI vendor and device 800 * IDs against our list and return a device name if we find a match. 801 */ 802static int 803re_probe(dev) 804 device_t dev; 805{ 806 struct rl_type *t; 807 struct rl_softc *sc; 808 int rid; 809 u_int32_t hwrev; 810 811 t = re_devs; 812 sc = device_get_softc(dev); 813 814 while (t->rl_name != NULL) { 815 if ((pci_get_vendor(dev) == t->rl_vid) && 816 (pci_get_device(dev) == t->rl_did)) { 817 818 /* 819 * Temporarily map the I/O space 820 * so we can read the chip ID register. 821 */ 822 rid = RL_RID; 823 sc->rl_res = bus_alloc_resource_any(dev, RL_RES, &rid, 824 RF_ACTIVE); 825 if (sc->rl_res == NULL) { 826 device_printf(dev, 827 "couldn't map ports/memory\n"); 828 return (ENXIO); 829 } 830 sc->rl_btag = rman_get_bustag(sc->rl_res); 831 sc->rl_bhandle = rman_get_bushandle(sc->rl_res); 832 hwrev = CSR_READ_4(sc, RL_TXCFG) & RL_TXCFG_HWREV; 833 bus_release_resource(dev, RL_RES, 834 RL_RID, sc->rl_res); 835 if (t->rl_basetype == hwrev) { 836 device_set_desc(dev, t->rl_name); 837 return (0); 838 } 839 } 840 t++; 841 } 842 843 return (ENXIO); 844} 845 846/* 847 * This routine takes the segment list provided as the result of 848 * a bus_dma_map_load() operation and assigns the addresses/lengths 849 * to RealTek DMA descriptors. This can be called either by the RX 850 * code or the TX code. In the RX case, we'll probably wind up mapping 851 * at most one segment. For the TX case, there could be any number of 852 * segments since TX packets may span multiple mbufs. In either case, 853 * if the number of segments is larger than the rl_maxsegs limit 854 * specified by the caller, we abort the mapping operation. Sadly, 855 * whoever designed the buffer mapping API did not provide a way to 856 * return an error from here, so we have to fake it a bit. 857 */ 858 859static void 860re_dma_map_desc(arg, segs, nseg, mapsize, error) 861 void *arg; 862 bus_dma_segment_t *segs; 863 int nseg; 864 bus_size_t mapsize; 865 int error; 866{ 867 struct rl_dmaload_arg *ctx; 868 struct rl_desc *d = NULL; 869 int i = 0, idx; 870 871 if (error) 872 return; 873 874 ctx = arg; 875 876 /* Signal error to caller if there's too many segments */ 877 if (nseg > ctx->rl_maxsegs) { 878 ctx->rl_maxsegs = 0; 879 return; 880 } 881 882 /* 883 * Map the segment array into descriptors. Note that we set the 884 * start-of-frame and end-of-frame markers for either TX or RX, but 885 * they really only have meaning in the TX case. (In the RX case, 886 * it's the chip that tells us where packets begin and end.) 887 * We also keep track of the end of the ring and set the 888 * end-of-ring bits as needed, and we set the ownership bits 889 * in all except the very first descriptor. (The caller will 890 * set this descriptor later when it start transmission or 891 * reception.) 892 */ 893 idx = ctx->rl_idx; 894 for (;;) { 895 u_int32_t cmdstat; 896 d = &ctx->rl_ring[idx]; 897 if (le32toh(d->rl_cmdstat) & RL_RDESC_STAT_OWN) { 898 ctx->rl_maxsegs = 0; 899 return; 900 } 901 cmdstat = segs[i].ds_len; 902 d->rl_bufaddr_lo = htole32(RL_ADDR_LO(segs[i].ds_addr)); 903 d->rl_bufaddr_hi = htole32(RL_ADDR_HI(segs[i].ds_addr)); 904 if (i == 0) 905 cmdstat |= RL_TDESC_CMD_SOF; 906 else 907 cmdstat |= RL_TDESC_CMD_OWN; 908 if (idx == (RL_RX_DESC_CNT - 1)) 909 cmdstat |= RL_TDESC_CMD_EOR; 910 d->rl_cmdstat = htole32(cmdstat | ctx->rl_flags); 911 i++; 912 if (i == nseg) 913 break; 914 RL_DESC_INC(idx); 915 } 916 917 d->rl_cmdstat |= htole32(RL_TDESC_CMD_EOF); 918 ctx->rl_maxsegs = nseg; 919 ctx->rl_idx = idx; 920} 921 922/* 923 * Map a single buffer address. 924 */ 925 926static void 927re_dma_map_addr(arg, segs, nseg, error) 928 void *arg; 929 bus_dma_segment_t *segs; 930 int nseg; 931 int error; 932{ 933 u_int32_t *addr; 934 935 if (error) 936 return; 937 938 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 939 addr = arg; 940 *addr = segs->ds_addr; 941} 942 943static int 944re_allocmem(dev, sc) 945 device_t dev; 946 struct rl_softc *sc; 947{ 948 int error; 949 int nseg; 950 int i; 951 952 /* 953 * Allocate map for RX mbufs. 954 */ 955 nseg = 32; 956 error = bus_dma_tag_create(sc->rl_parent_tag, ETHER_ALIGN, 0, 957 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, 958 NULL, MCLBYTES * nseg, nseg, MCLBYTES, BUS_DMA_ALLOCNOW, 959 NULL, NULL, &sc->rl_ldata.rl_mtag); 960 if (error) { 961 device_printf(dev, "could not allocate dma tag\n"); 962 return (ENOMEM); 963 } 964 965 /* 966 * Allocate map for TX descriptor list. 967 */ 968 error = bus_dma_tag_create(sc->rl_parent_tag, RL_RING_ALIGN, 969 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, 970 NULL, RL_TX_LIST_SZ, 1, RL_TX_LIST_SZ, BUS_DMA_ALLOCNOW, 971 NULL, NULL, &sc->rl_ldata.rl_tx_list_tag); 972 if (error) { 973 device_printf(dev, "could not allocate dma tag\n"); 974 return (ENOMEM); 975 } 976 977 /* Allocate DMA'able memory for the TX ring */ 978 979 error = bus_dmamem_alloc(sc->rl_ldata.rl_tx_list_tag, 980 (void **)&sc->rl_ldata.rl_tx_list, BUS_DMA_NOWAIT | BUS_DMA_ZERO, 981 &sc->rl_ldata.rl_tx_list_map); 982 if (error) 983 return (ENOMEM); 984 985 /* Load the map for the TX ring. */ 986 987 error = bus_dmamap_load(sc->rl_ldata.rl_tx_list_tag, 988 sc->rl_ldata.rl_tx_list_map, sc->rl_ldata.rl_tx_list, 989 RL_TX_LIST_SZ, re_dma_map_addr, 990 &sc->rl_ldata.rl_tx_list_addr, BUS_DMA_NOWAIT); 991 992 /* Create DMA maps for TX buffers */ 993 994 for (i = 0; i < RL_TX_DESC_CNT; i++) { 995 error = bus_dmamap_create(sc->rl_ldata.rl_mtag, 0, 996 &sc->rl_ldata.rl_tx_dmamap[i]); 997 if (error) { 998 device_printf(dev, "can't create DMA map for TX\n"); 999 return (ENOMEM); 1000 } 1001 } 1002 1003 /* 1004 * Allocate map for RX descriptor list. 1005 */ 1006 error = bus_dma_tag_create(sc->rl_parent_tag, RL_RING_ALIGN, 1007 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, 1008 NULL, RL_RX_LIST_SZ, 1, RL_RX_LIST_SZ, BUS_DMA_ALLOCNOW, 1009 NULL, NULL, &sc->rl_ldata.rl_rx_list_tag); 1010 if (error) { 1011 device_printf(dev, "could not allocate dma tag\n"); 1012 return (ENOMEM); 1013 } 1014 1015 /* Allocate DMA'able memory for the RX ring */ 1016 1017 error = bus_dmamem_alloc(sc->rl_ldata.rl_rx_list_tag, 1018 (void **)&sc->rl_ldata.rl_rx_list, BUS_DMA_NOWAIT | BUS_DMA_ZERO, 1019 &sc->rl_ldata.rl_rx_list_map); 1020 if (error) 1021 return (ENOMEM); 1022 1023 /* Load the map for the RX ring. */ 1024 1025 error = bus_dmamap_load(sc->rl_ldata.rl_rx_list_tag, 1026 sc->rl_ldata.rl_rx_list_map, sc->rl_ldata.rl_rx_list, 1027 RL_RX_LIST_SZ, re_dma_map_addr, 1028 &sc->rl_ldata.rl_rx_list_addr, BUS_DMA_NOWAIT); 1029 1030 /* Create DMA maps for RX buffers */ 1031 1032 for (i = 0; i < RL_RX_DESC_CNT; i++) { 1033 error = bus_dmamap_create(sc->rl_ldata.rl_mtag, 0, 1034 &sc->rl_ldata.rl_rx_dmamap[i]); 1035 if (error) { 1036 device_printf(dev, "can't create DMA map for RX\n"); 1037 return (ENOMEM); 1038 } 1039 } 1040 1041 return (0); 1042} 1043 1044/* 1045 * Attach the interface. Allocate softc structures, do ifmedia 1046 * setup and ethernet/BPF attach. 1047 */ 1048static int 1049re_attach(dev) 1050 device_t dev; 1051{ 1052 u_char eaddr[ETHER_ADDR_LEN]; 1053 u_int16_t as[3]; 1054 struct rl_softc *sc; 1055 struct ifnet *ifp; 1056 struct rl_hwrev *hw_rev; 1057 int hwrev; 1058 u_int16_t re_did = 0; 1059 int unit, error = 0, rid, i; 1060 1061 sc = device_get_softc(dev); 1062 unit = device_get_unit(dev); 1063 1064 mtx_init(&sc->rl_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 1065 MTX_DEF); 1066 /* 1067 * Map control/status registers. 1068 */ 1069 pci_enable_busmaster(dev); 1070 1071 rid = RL_RID; 1072 sc->rl_res = bus_alloc_resource_any(dev, RL_RES, &rid, 1073 RF_ACTIVE); 1074 1075 if (sc->rl_res == NULL) { 1076 printf ("re%d: couldn't map ports/memory\n", unit); 1077 error = ENXIO; 1078 goto fail; 1079 } 1080 1081 sc->rl_btag = rman_get_bustag(sc->rl_res); 1082 sc->rl_bhandle = rman_get_bushandle(sc->rl_res); 1083 1084 /* Allocate interrupt */ 1085 rid = 0; 1086 sc->rl_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 1087 RF_SHAREABLE | RF_ACTIVE); 1088 1089 if (sc->rl_irq == NULL) { 1090 printf("re%d: couldn't map interrupt\n", unit); 1091 error = ENXIO; 1092 goto fail; 1093 } 1094 1095 /* Reset the adapter. */ 1096 RL_LOCK(sc); 1097 re_reset(sc); 1098 RL_UNLOCK(sc); 1099 1100 hw_rev = re_hwrevs; 1101 hwrev = CSR_READ_4(sc, RL_TXCFG) & RL_TXCFG_HWREV; 1102 while (hw_rev->rl_desc != NULL) { 1103 if (hw_rev->rl_rev == hwrev) { 1104 sc->rl_type = hw_rev->rl_type; 1105 break; 1106 } 1107 hw_rev++; 1108 } 1109 1110 if (sc->rl_type == RL_8169) { 1111 1112 /* Set RX length mask */ 1113 1114 sc->rl_rxlenmask = RL_RDESC_STAT_GFRAGLEN; 1115 1116 /* Force station address autoload from the EEPROM */ 1117 1118 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_AUTOLOAD); 1119 for (i = 0; i < RL_TIMEOUT; i++) { 1120 if (!(CSR_READ_1(sc, RL_EECMD) & RL_EEMODE_AUTOLOAD)) 1121 break; 1122 DELAY(100); 1123 } 1124 if (i == RL_TIMEOUT) 1125 printf ("re%d: eeprom autoload timed out\n", unit); 1126 1127 for (i = 0; i < ETHER_ADDR_LEN; i++) 1128 eaddr[i] = CSR_READ_1(sc, RL_IDR0 + i); 1129 } else { 1130 1131 /* Set RX length mask */ 1132 1133 sc->rl_rxlenmask = RL_RDESC_STAT_FRAGLEN; 1134 1135 sc->rl_eecmd_read = RL_EECMD_READ_6BIT; 1136 re_read_eeprom(sc, (caddr_t)&re_did, 0, 1, 0); 1137 if (re_did != 0x8129) 1138 sc->rl_eecmd_read = RL_EECMD_READ_8BIT; 1139 1140 /* 1141 * Get station address from the EEPROM. 1142 */ 1143 re_read_eeprom(sc, (caddr_t)as, RL_EE_EADDR, 3, 0); 1144 for (i = 0; i < 3; i++) { 1145 eaddr[(i * 2) + 0] = as[i] & 0xff; 1146 eaddr[(i * 2) + 1] = as[i] >> 8; 1147 } 1148 } 1149 1150 sc->rl_unit = unit; 1151 bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN); 1152 1153 /* 1154 * Allocate the parent bus DMA tag appropriate for PCI. 1155 */ 1156#define RL_NSEG_NEW 32 1157 error = bus_dma_tag_create(NULL, /* parent */ 1158 1, 0, /* alignment, boundary */ 1159 BUS_SPACE_MAXADDR_32BIT,/* lowaddr */ 1160 BUS_SPACE_MAXADDR, /* highaddr */ 1161 NULL, NULL, /* filter, filterarg */ 1162 MAXBSIZE, RL_NSEG_NEW, /* maxsize, nsegments */ 1163 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */ 1164 BUS_DMA_ALLOCNOW, /* flags */ 1165 NULL, NULL, /* lockfunc, lockarg */ 1166 &sc->rl_parent_tag); 1167 if (error) 1168 goto fail; 1169 1170 error = re_allocmem(dev, sc); 1171 1172 if (error) 1173 goto fail; 1174 1175 /* Do MII setup */ 1176 if (mii_phy_probe(dev, &sc->rl_miibus, 1177 re_ifmedia_upd, re_ifmedia_sts)) { 1178 printf("re%d: MII without any phy!\n", sc->rl_unit); 1179 error = ENXIO; 1180 goto fail; 1181 } 1182 1183 ifp = &sc->arpcom.ac_if; 1184 ifp->if_softc = sc; 1185 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 1186 ifp->if_mtu = ETHERMTU; 1187 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 1188 ifp->if_ioctl = re_ioctl; 1189 ifp->if_capabilities = IFCAP_VLAN_MTU; 1190 ifp->if_start = re_start; 1191 ifp->if_hwassist = RE_CSUM_FEATURES; 1192 ifp->if_capabilities |= IFCAP_HWCSUM|IFCAP_VLAN_HWTAGGING; 1193#ifdef DEVICE_POLLING 1194 ifp->if_capabilities |= IFCAP_POLLING; 1195#endif 1196 ifp->if_watchdog = re_watchdog; 1197 ifp->if_init = re_init; 1198 if (sc->rl_type == RL_8169) 1199 ifp->if_baudrate = 1000000000; 1200 else 1201 ifp->if_baudrate = 100000000; 1202 ifp->if_snd.ifq_maxlen = RL_IFQ_MAXLEN; 1203 ifp->if_capenable = ifp->if_capabilities; 1204 1205 callout_handle_init(&sc->rl_stat_ch); 1206 1207 /* 1208 * Call MI attach routine. 1209 */ 1210 ether_ifattach(ifp, eaddr); 1211 1212 /* Perform hardware diagnostic. */ 1213 error = re_diag(sc); 1214 1215 if (error) { 1216 printf("re%d: attach aborted due to hardware diag failure\n", 1217 unit); 1218 ether_ifdetach(ifp); 1219 goto fail; 1220 } 1221 1222 /* Hook interrupt last to avoid having to lock softc */ 1223 error = bus_setup_intr(dev, sc->rl_irq, INTR_TYPE_NET | INTR_MPSAFE, 1224 re_intr, sc, &sc->rl_intrhand); 1225 if (error) { 1226 printf("re%d: couldn't set up irq\n", unit); 1227 ether_ifdetach(ifp); 1228 } 1229 1230fail: 1231 if (error) 1232 re_detach(dev); 1233 1234 return (error); 1235} 1236 1237/* 1238 * Shutdown hardware and free up resources. This can be called any 1239 * time after the mutex has been initialized. It is called in both 1240 * the error case in attach and the normal detach case so it needs 1241 * to be careful about only freeing resources that have actually been 1242 * allocated. 1243 */ 1244static int 1245re_detach(dev) 1246 device_t dev; 1247{ 1248 struct rl_softc *sc; 1249 struct ifnet *ifp; 1250 int i; 1251 int attached; 1252 1253 sc = device_get_softc(dev); 1254 ifp = &sc->arpcom.ac_if; 1255 KASSERT(mtx_initialized(&sc->rl_mtx), ("rl mutex not initialized")); 1256 1257 attached = device_is_attached(dev); 1258 /* These should only be active if attach succeeded */ 1259 if (attached) 1260 ether_ifdetach(ifp); 1261 1262 RL_LOCK(sc); 1263#if 0 1264 sc->suspended = 1; 1265#endif 1266 1267 /* These should only be active if attach succeeded */ 1268 if (attached) { 1269 re_stop(sc); 1270 /* 1271 * Force off the IFF_UP flag here, in case someone 1272 * still had a BPF descriptor attached to this 1273 * interface. If they do, ether_ifdetach() will cause 1274 * the BPF code to try and clear the promisc mode 1275 * flag, which will bubble down to re_ioctl(), 1276 * which will try to call re_init() again. This will 1277 * turn the NIC back on and restart the MII ticker, 1278 * which will panic the system when the kernel tries 1279 * to invoke the re_tick() function that isn't there 1280 * anymore. 1281 */ 1282 ifp->if_flags &= ~IFF_UP; 1283 ether_ifdetach(ifp); 1284 } 1285 if (sc->rl_miibus) 1286 device_delete_child(dev, sc->rl_miibus); 1287 bus_generic_detach(dev); 1288 1289 /* 1290 * The rest is resource deallocation, so we should already be 1291 * stopped here. 1292 */ 1293 RL_UNLOCK(sc); 1294 1295 if (sc->rl_intrhand) 1296 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand); 1297 if (sc->rl_irq) 1298 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq); 1299 if (sc->rl_res) 1300 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res); 1301 1302 1303 /* Unload and free the RX DMA ring memory and map */ 1304 1305 if (sc->rl_ldata.rl_rx_list_tag) { 1306 bus_dmamap_unload(sc->rl_ldata.rl_rx_list_tag, 1307 sc->rl_ldata.rl_rx_list_map); 1308 bus_dmamem_free(sc->rl_ldata.rl_rx_list_tag, 1309 sc->rl_ldata.rl_rx_list, 1310 sc->rl_ldata.rl_rx_list_map); 1311 bus_dma_tag_destroy(sc->rl_ldata.rl_rx_list_tag); 1312 } 1313 1314 /* Unload and free the TX DMA ring memory and map */ 1315 1316 if (sc->rl_ldata.rl_tx_list_tag) { 1317 bus_dmamap_unload(sc->rl_ldata.rl_tx_list_tag, 1318 sc->rl_ldata.rl_tx_list_map); 1319 bus_dmamem_free(sc->rl_ldata.rl_tx_list_tag, 1320 sc->rl_ldata.rl_tx_list, 1321 sc->rl_ldata.rl_tx_list_map); 1322 bus_dma_tag_destroy(sc->rl_ldata.rl_tx_list_tag); 1323 } 1324 1325 /* Destroy all the RX and TX buffer maps */ 1326 1327 if (sc->rl_ldata.rl_mtag) { 1328 for (i = 0; i < RL_TX_DESC_CNT; i++) 1329 bus_dmamap_destroy(sc->rl_ldata.rl_mtag, 1330 sc->rl_ldata.rl_tx_dmamap[i]); 1331 for (i = 0; i < RL_RX_DESC_CNT; i++) 1332 bus_dmamap_destroy(sc->rl_ldata.rl_mtag, 1333 sc->rl_ldata.rl_rx_dmamap[i]); 1334 bus_dma_tag_destroy(sc->rl_ldata.rl_mtag); 1335 } 1336 1337 /* Unload and free the stats buffer and map */ 1338 1339 if (sc->rl_ldata.rl_stag) { 1340 bus_dmamap_unload(sc->rl_ldata.rl_stag, 1341 sc->rl_ldata.rl_rx_list_map); 1342 bus_dmamem_free(sc->rl_ldata.rl_stag, 1343 sc->rl_ldata.rl_stats, 1344 sc->rl_ldata.rl_smap); 1345 bus_dma_tag_destroy(sc->rl_ldata.rl_stag); 1346 } 1347 1348 if (sc->rl_parent_tag) 1349 bus_dma_tag_destroy(sc->rl_parent_tag); 1350 1351 mtx_destroy(&sc->rl_mtx); 1352 1353 return (0); 1354} 1355 1356static int 1357re_newbuf(sc, idx, m) 1358 struct rl_softc *sc; 1359 int idx; 1360 struct mbuf *m; 1361{ 1362 struct rl_dmaload_arg arg; 1363 struct mbuf *n = NULL; 1364 int error; 1365 1366 if (m == NULL) { 1367 n = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1368 if (n == NULL) 1369 return (ENOBUFS); 1370 m = n; 1371 } else 1372 m->m_data = m->m_ext.ext_buf; 1373 1374 /* 1375 * Initialize mbuf length fields and fixup 1376 * alignment so that the frame payload is 1377 * longword aligned. 1378 */ 1379 m->m_len = m->m_pkthdr.len = MCLBYTES; 1380 m_adj(m, ETHER_ALIGN); 1381 1382 arg.sc = sc; 1383 arg.rl_idx = idx; 1384 arg.rl_maxsegs = 1; 1385 arg.rl_flags = 0; 1386 arg.rl_ring = sc->rl_ldata.rl_rx_list; 1387 1388 error = bus_dmamap_load_mbuf(sc->rl_ldata.rl_mtag, 1389 sc->rl_ldata.rl_rx_dmamap[idx], m, re_dma_map_desc, 1390 &arg, BUS_DMA_NOWAIT); 1391 if (error || arg.rl_maxsegs != 1) { 1392 if (n != NULL) 1393 m_freem(n); 1394 return (ENOMEM); 1395 } 1396 1397 sc->rl_ldata.rl_rx_list[idx].rl_cmdstat |= htole32(RL_RDESC_CMD_OWN); 1398 sc->rl_ldata.rl_rx_mbuf[idx] = m; 1399 1400 bus_dmamap_sync(sc->rl_ldata.rl_mtag, 1401 sc->rl_ldata.rl_rx_dmamap[idx], 1402 BUS_DMASYNC_PREREAD); 1403 1404 return (0); 1405} 1406 1407static int 1408re_tx_list_init(sc) 1409 struct rl_softc *sc; 1410{ 1411 1412 RL_LOCK_ASSERT(sc); 1413 1414 bzero ((char *)sc->rl_ldata.rl_tx_list, RL_TX_LIST_SZ); 1415 bzero ((char *)&sc->rl_ldata.rl_tx_mbuf, 1416 (RL_TX_DESC_CNT * sizeof(struct mbuf *))); 1417 1418 bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag, 1419 sc->rl_ldata.rl_tx_list_map, BUS_DMASYNC_PREWRITE); 1420 sc->rl_ldata.rl_tx_prodidx = 0; 1421 sc->rl_ldata.rl_tx_considx = 0; 1422 sc->rl_ldata.rl_tx_free = RL_TX_DESC_CNT; 1423 1424 return (0); 1425} 1426 1427static int 1428re_rx_list_init(sc) 1429 struct rl_softc *sc; 1430{ 1431 int i; 1432 1433 bzero ((char *)sc->rl_ldata.rl_rx_list, RL_RX_LIST_SZ); 1434 bzero ((char *)&sc->rl_ldata.rl_rx_mbuf, 1435 (RL_RX_DESC_CNT * sizeof(struct mbuf *))); 1436 1437 for (i = 0; i < RL_RX_DESC_CNT; i++) { 1438 if (re_newbuf(sc, i, NULL) == ENOBUFS) 1439 return (ENOBUFS); 1440 } 1441 1442 /* Flush the RX descriptors */ 1443 1444 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, 1445 sc->rl_ldata.rl_rx_list_map, 1446 BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD); 1447 1448 sc->rl_ldata.rl_rx_prodidx = 0; 1449 sc->rl_head = sc->rl_tail = NULL; 1450 1451 return (0); 1452} 1453 1454/* 1455 * RX handler for C+ and 8169. For the gigE chips, we support 1456 * the reception of jumbo frames that have been fragmented 1457 * across multiple 2K mbuf cluster buffers. 1458 */ 1459static void 1460re_rxeof(sc) 1461 struct rl_softc *sc; 1462{ 1463 struct mbuf *m; 1464 struct ifnet *ifp; 1465 int i, total_len; 1466 struct rl_desc *cur_rx; 1467 u_int32_t rxstat, rxvlan; 1468 1469 RL_LOCK_ASSERT(sc); 1470 1471 ifp = &sc->arpcom.ac_if; 1472 i = sc->rl_ldata.rl_rx_prodidx; 1473 1474 /* Invalidate the descriptor memory */ 1475 1476 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, 1477 sc->rl_ldata.rl_rx_list_map, 1478 BUS_DMASYNC_POSTREAD); 1479 1480 while (!RL_OWN(&sc->rl_ldata.rl_rx_list[i])) { 1481 1482 cur_rx = &sc->rl_ldata.rl_rx_list[i]; 1483 m = sc->rl_ldata.rl_rx_mbuf[i]; 1484 total_len = RL_RXBYTES(cur_rx); 1485 rxstat = le32toh(cur_rx->rl_cmdstat); 1486 rxvlan = le32toh(cur_rx->rl_vlanctl); 1487 1488 /* Invalidate the RX mbuf and unload its map */ 1489 1490 bus_dmamap_sync(sc->rl_ldata.rl_mtag, 1491 sc->rl_ldata.rl_rx_dmamap[i], 1492 BUS_DMASYNC_POSTWRITE); 1493 bus_dmamap_unload(sc->rl_ldata.rl_mtag, 1494 sc->rl_ldata.rl_rx_dmamap[i]); 1495 1496 if (!(rxstat & RL_RDESC_STAT_EOF)) { 1497 m->m_len = MCLBYTES - ETHER_ALIGN; 1498 if (sc->rl_head == NULL) 1499 sc->rl_head = sc->rl_tail = m; 1500 else { 1501 m->m_flags &= ~M_PKTHDR; 1502 sc->rl_tail->m_next = m; 1503 sc->rl_tail = m; 1504 } 1505 re_newbuf(sc, i, NULL); 1506 RL_DESC_INC(i); 1507 continue; 1508 } 1509 1510 /* 1511 * NOTE: for the 8139C+, the frame length field 1512 * is always 12 bits in size, but for the gigE chips, 1513 * it is 13 bits (since the max RX frame length is 16K). 1514 * Unfortunately, all 32 bits in the status word 1515 * were already used, so to make room for the extra 1516 * length bit, RealTek took out the 'frame alignment 1517 * error' bit and shifted the other status bits 1518 * over one slot. The OWN, EOR, FS and LS bits are 1519 * still in the same places. We have already extracted 1520 * the frame length and checked the OWN bit, so rather 1521 * than using an alternate bit mapping, we shift the 1522 * status bits one space to the right so we can evaluate 1523 * them using the 8169 status as though it was in the 1524 * same format as that of the 8139C+. 1525 */ 1526 if (sc->rl_type == RL_8169) 1527 rxstat >>= 1; 1528 1529 if (rxstat & RL_RDESC_STAT_RXERRSUM) { 1530 ifp->if_ierrors++; 1531 /* 1532 * If this is part of a multi-fragment packet, 1533 * discard all the pieces. 1534 */ 1535 if (sc->rl_head != NULL) { 1536 m_freem(sc->rl_head); 1537 sc->rl_head = sc->rl_tail = NULL; 1538 } 1539 re_newbuf(sc, i, m); 1540 RL_DESC_INC(i); 1541 continue; 1542 } 1543 1544 /* 1545 * If allocating a replacement mbuf fails, 1546 * reload the current one. 1547 */ 1548 1549 if (re_newbuf(sc, i, NULL)) { 1550 ifp->if_ierrors++; 1551 if (sc->rl_head != NULL) { 1552 m_freem(sc->rl_head); 1553 sc->rl_head = sc->rl_tail = NULL; 1554 } 1555 re_newbuf(sc, i, m); 1556 RL_DESC_INC(i); 1557 continue; 1558 } 1559 1560 RL_DESC_INC(i); 1561 1562 if (sc->rl_head != NULL) { 1563 m->m_len = total_len % (MCLBYTES - ETHER_ALIGN); 1564 /* 1565 * Special case: if there's 4 bytes or less 1566 * in this buffer, the mbuf can be discarded: 1567 * the last 4 bytes is the CRC, which we don't 1568 * care about anyway. 1569 */ 1570 if (m->m_len <= ETHER_CRC_LEN) { 1571 sc->rl_tail->m_len -= 1572 (ETHER_CRC_LEN - m->m_len); 1573 m_freem(m); 1574 } else { 1575 m->m_len -= ETHER_CRC_LEN; 1576 m->m_flags &= ~M_PKTHDR; 1577 sc->rl_tail->m_next = m; 1578 } 1579 m = sc->rl_head; 1580 sc->rl_head = sc->rl_tail = NULL; 1581 m->m_pkthdr.len = total_len - ETHER_CRC_LEN; 1582 } else 1583 m->m_pkthdr.len = m->m_len = 1584 (total_len - ETHER_CRC_LEN); 1585 1586 ifp->if_ipackets++; 1587 m->m_pkthdr.rcvif = ifp; 1588 1589 /* Do RX checksumming if enabled */ 1590 1591 if (ifp->if_capenable & IFCAP_RXCSUM) { 1592 1593 /* Check IP header checksum */ 1594 if (rxstat & RL_RDESC_STAT_PROTOID) 1595 m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED; 1596 if (!(rxstat & RL_RDESC_STAT_IPSUMBAD)) 1597 m->m_pkthdr.csum_flags |= CSUM_IP_VALID; 1598 1599 /* Check TCP/UDP checksum */ 1600 if ((RL_TCPPKT(rxstat) && 1601 !(rxstat & RL_RDESC_STAT_TCPSUMBAD)) || 1602 (RL_UDPPKT(rxstat) && 1603 !(rxstat & RL_RDESC_STAT_UDPSUMBAD))) { 1604 m->m_pkthdr.csum_flags |= 1605 CSUM_DATA_VALID|CSUM_PSEUDO_HDR; 1606 m->m_pkthdr.csum_data = 0xffff; 1607 } 1608 } 1609 1610 if (rxvlan & RL_RDESC_VLANCTL_TAG) 1611 VLAN_INPUT_TAG(ifp, m, 1612 ntohs((rxvlan & RL_RDESC_VLANCTL_DATA)), continue); 1613 RL_UNLOCK(sc); 1614 (*ifp->if_input)(ifp, m); 1615 RL_LOCK(sc); 1616 } 1617 1618 /* Flush the RX DMA ring */ 1619 1620 bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, 1621 sc->rl_ldata.rl_rx_list_map, 1622 BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD); 1623 1624 sc->rl_ldata.rl_rx_prodidx = i; 1625} 1626 1627static void 1628re_txeof(sc) 1629 struct rl_softc *sc; 1630{ 1631 struct ifnet *ifp; 1632 u_int32_t txstat; 1633 int idx; 1634 1635 ifp = &sc->arpcom.ac_if; 1636 idx = sc->rl_ldata.rl_tx_considx; 1637 1638 /* Invalidate the TX descriptor list */ 1639 1640 bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag, 1641 sc->rl_ldata.rl_tx_list_map, 1642 BUS_DMASYNC_POSTREAD); 1643 1644 while (idx != sc->rl_ldata.rl_tx_prodidx) { 1645 1646 txstat = le32toh(sc->rl_ldata.rl_tx_list[idx].rl_cmdstat); 1647 if (txstat & RL_TDESC_CMD_OWN) 1648 break; 1649 1650 /* 1651 * We only stash mbufs in the last descriptor 1652 * in a fragment chain, which also happens to 1653 * be the only place where the TX status bits 1654 * are valid. 1655 */ 1656 1657 if (txstat & RL_TDESC_CMD_EOF) { 1658 m_freem(sc->rl_ldata.rl_tx_mbuf[idx]); 1659 sc->rl_ldata.rl_tx_mbuf[idx] = NULL; 1660 bus_dmamap_unload(sc->rl_ldata.rl_mtag, 1661 sc->rl_ldata.rl_tx_dmamap[idx]); 1662 if (txstat & (RL_TDESC_STAT_EXCESSCOL| 1663 RL_TDESC_STAT_COLCNT)) 1664 ifp->if_collisions++; 1665 if (txstat & RL_TDESC_STAT_TXERRSUM) 1666 ifp->if_oerrors++; 1667 else 1668 ifp->if_opackets++; 1669 } 1670 sc->rl_ldata.rl_tx_free++; 1671 RL_DESC_INC(idx); 1672 } 1673 1674 /* No changes made to the TX ring, so no flush needed */ 1675 1676 if (idx != sc->rl_ldata.rl_tx_considx) { 1677 sc->rl_ldata.rl_tx_considx = idx; 1678 ifp->if_flags &= ~IFF_OACTIVE; 1679 ifp->if_timer = 0; 1680 } 1681 1682 /* 1683 * If not all descriptors have been released reaped yet, 1684 * reload the timer so that we will eventually get another 1685 * interrupt that will cause us to re-enter this routine. 1686 * This is done in case the transmitter has gone idle. 1687 */ 1688 if (sc->rl_ldata.rl_tx_free != RL_TX_DESC_CNT) 1689 CSR_WRITE_4(sc, RL_TIMERCNT, 1); 1690} 1691 1692static void 1693re_tick(xsc) 1694 void *xsc; 1695{ 1696 struct rl_softc *sc; 1697 1698 sc = xsc; 1699 RL_LOCK(sc); 1700 re_tick_locked(sc); 1701 RL_UNLOCK(sc); 1702} 1703 1704static void 1705re_tick_locked(sc) 1706 struct rl_softc *sc; 1707{ 1708 struct mii_data *mii; 1709 1710 RL_LOCK_ASSERT(sc); 1711 1712 mii = device_get_softc(sc->rl_miibus); 1713 1714 mii_tick(mii); 1715 1716 sc->rl_stat_ch = timeout(re_tick, sc, hz); 1717} 1718 1719#ifdef DEVICE_POLLING 1720static void 1721re_poll(struct ifnet *ifp, enum poll_cmd cmd, int count) 1722{ 1723 struct rl_softc *sc = ifp->if_softc; 1724 1725 RL_LOCK(sc); 1726 re_poll_locked(ifp, cmd, count); 1727 RL_UNLOCK(sc); 1728} 1729 1730static void 1731re_poll_locked(struct ifnet *ifp, enum poll_cmd cmd, int count) 1732{ 1733 struct rl_softc *sc = ifp->if_softc; 1734 1735 RL_LOCK_ASSERT(sc); 1736 1737 if (!(ifp->if_capenable & IFCAP_POLLING)) { 1738 ether_poll_deregister(ifp); 1739 cmd = POLL_DEREGISTER; 1740 } 1741 if (cmd == POLL_DEREGISTER) { /* final call, enable interrupts */ 1742 CSR_WRITE_2(sc, RL_IMR, RL_INTRS_CPLUS); 1743 return; 1744 } 1745 1746 sc->rxcycles = count; 1747 re_rxeof(sc); 1748 re_txeof(sc); 1749 1750 if (ifp->if_snd.ifq_head != NULL) 1751 re_start_locked(ifp); 1752 1753 if (cmd == POLL_AND_CHECK_STATUS) { /* also check status register */ 1754 u_int16_t status; 1755 1756 status = CSR_READ_2(sc, RL_ISR); 1757 if (status == 0xffff) 1758 return; 1759 if (status) 1760 CSR_WRITE_2(sc, RL_ISR, status); 1761 1762 /* 1763 * XXX check behaviour on receiver stalls. 1764 */ 1765 1766 if (status & RL_ISR_SYSTEM_ERR) { 1767 re_reset(sc); 1768 re_init_locked(sc); 1769 } 1770 } 1771} 1772#endif /* DEVICE_POLLING */ 1773 1774static void 1775re_intr(arg) 1776 void *arg; 1777{ 1778 struct rl_softc *sc; 1779 struct ifnet *ifp; 1780 u_int16_t status; 1781 1782 sc = arg; 1783 1784 RL_LOCK(sc); 1785 1786 ifp = &sc->arpcom.ac_if; 1787 1788 if (sc->suspended || !(ifp->if_flags & IFF_UP)) 1789 goto done_locked; 1790 1791#ifdef DEVICE_POLLING 1792 if (ifp->if_flags & IFF_POLLING) 1793 goto done_locked; 1794 if ((ifp->if_capenable & IFCAP_POLLING) && 1795 ether_poll_register(re_poll, ifp)) { /* ok, disable interrupts */ 1796 CSR_WRITE_2(sc, RL_IMR, 0x0000); 1797 re_poll_locked(ifp, 0, 1); 1798 goto done_locked; 1799 } 1800#endif /* DEVICE_POLLING */ 1801 1802 for (;;) { 1803 1804 status = CSR_READ_2(sc, RL_ISR); 1805 /* If the card has gone away the read returns 0xffff. */ 1806 if (status == 0xffff) 1807 break; 1808 if (status) 1809 CSR_WRITE_2(sc, RL_ISR, status); 1810 1811 if ((status & RL_INTRS_CPLUS) == 0) 1812 break; 1813 1814 if ((status & RL_ISR_RX_OK) || 1815 (status & RL_ISR_RX_ERR)) 1816 re_rxeof(sc); 1817 1818 if ((status & RL_ISR_TIMEOUT_EXPIRED) || 1819 (status & RL_ISR_TX_ERR) || 1820 (status & RL_ISR_TX_DESC_UNAVAIL)) 1821 re_txeof(sc); 1822 1823 if (status & RL_ISR_SYSTEM_ERR) { 1824 re_reset(sc); 1825 re_init_locked(sc); 1826 } 1827 1828 if (status & RL_ISR_LINKCHG) { 1829 untimeout(re_tick, sc, sc->rl_stat_ch); 1830 re_tick_locked(sc); 1831 } 1832 } 1833 1834 if (ifp->if_snd.ifq_head != NULL) 1835 re_start_locked(ifp); 1836 1837done_locked: 1838 RL_UNLOCK(sc); 1839} 1840 1841static int 1842re_encap(sc, m_head, idx) 1843 struct rl_softc *sc; 1844 struct mbuf **m_head; 1845 int *idx; 1846{ 1847 struct mbuf *m_new = NULL; 1848 struct rl_dmaload_arg arg; 1849 bus_dmamap_t map; 1850 int error; 1851 struct m_tag *mtag; 1852 1853 RL_LOCK_ASSERT(sc); 1854 1855 if (sc->rl_ldata.rl_tx_free <= 4) 1856 return (EFBIG); 1857 1858 /* 1859 * Set up checksum offload. Note: checksum offload bits must 1860 * appear in all descriptors of a multi-descriptor transmit 1861 * attempt. (This is according to testing done with an 8169 1862 * chip. I'm not sure if this is a requirement or a bug.) 1863 */ 1864 1865 arg.rl_flags = 0; 1866 1867 if ((*m_head)->m_pkthdr.csum_flags & CSUM_IP) 1868 arg.rl_flags |= RL_TDESC_CMD_IPCSUM; 1869 if ((*m_head)->m_pkthdr.csum_flags & CSUM_TCP) 1870 arg.rl_flags |= RL_TDESC_CMD_TCPCSUM; 1871 if ((*m_head)->m_pkthdr.csum_flags & CSUM_UDP) 1872 arg.rl_flags |= RL_TDESC_CMD_UDPCSUM; 1873 1874 arg.sc = sc; 1875 arg.rl_idx = *idx; 1876 arg.rl_maxsegs = sc->rl_ldata.rl_tx_free; 1877 if (arg.rl_maxsegs > 4) 1878 arg.rl_maxsegs -= 4; 1879 arg.rl_ring = sc->rl_ldata.rl_tx_list; 1880 1881 map = sc->rl_ldata.rl_tx_dmamap[*idx]; 1882 error = bus_dmamap_load_mbuf(sc->rl_ldata.rl_mtag, map, 1883 *m_head, re_dma_map_desc, &arg, BUS_DMA_NOWAIT); 1884 1885 if (error && error != EFBIG) { 1886 printf("re%d: can't map mbuf (error %d)\n", sc->rl_unit, error); 1887 return (ENOBUFS); 1888 } 1889 1890 /* Too many segments to map, coalesce into a single mbuf */ 1891 1892 if (error || arg.rl_maxsegs == 0) { 1893 m_new = m_defrag(*m_head, M_DONTWAIT); 1894 if (m_new == NULL) 1895 return (ENOBUFS); 1896 else 1897 *m_head = m_new; 1898 1899 arg.sc = sc; 1900 arg.rl_idx = *idx; 1901 arg.rl_maxsegs = sc->rl_ldata.rl_tx_free; 1902 arg.rl_ring = sc->rl_ldata.rl_tx_list; 1903 1904 error = bus_dmamap_load_mbuf(sc->rl_ldata.rl_mtag, map, 1905 *m_head, re_dma_map_desc, &arg, BUS_DMA_NOWAIT); 1906 if (error) { 1907 printf("re%d: can't map mbuf (error %d)\n", 1908 sc->rl_unit, error); 1909 return (EFBIG); 1910 } 1911 } 1912 1913 /* 1914 * Insure that the map for this transmission 1915 * is placed at the array index of the last descriptor 1916 * in this chain. 1917 */ 1918 sc->rl_ldata.rl_tx_dmamap[*idx] = 1919 sc->rl_ldata.rl_tx_dmamap[arg.rl_idx]; 1920 sc->rl_ldata.rl_tx_dmamap[arg.rl_idx] = map; 1921 1922 sc->rl_ldata.rl_tx_mbuf[arg.rl_idx] = *m_head; 1923 sc->rl_ldata.rl_tx_free -= arg.rl_maxsegs; 1924 1925 /* 1926 * Set up hardware VLAN tagging. Note: vlan tag info must 1927 * appear in the first descriptor of a multi-descriptor 1928 * transmission attempt. 1929 */ 1930 1931 mtag = VLAN_OUTPUT_TAG(&sc->arpcom.ac_if, *m_head); 1932 if (mtag != NULL) 1933 sc->rl_ldata.rl_tx_list[*idx].rl_vlanctl = 1934 htole32(htons(VLAN_TAG_VALUE(mtag)) | RL_TDESC_VLANCTL_TAG); 1935 1936 /* Transfer ownership of packet to the chip. */ 1937 1938 sc->rl_ldata.rl_tx_list[arg.rl_idx].rl_cmdstat |= 1939 htole32(RL_TDESC_CMD_OWN); 1940 if (*idx != arg.rl_idx) 1941 sc->rl_ldata.rl_tx_list[*idx].rl_cmdstat |= 1942 htole32(RL_TDESC_CMD_OWN); 1943 1944 RL_DESC_INC(arg.rl_idx); 1945 *idx = arg.rl_idx; 1946 1947 return (0); 1948} 1949 1950static void 1951re_start(ifp) 1952 struct ifnet *ifp; 1953{ 1954 struct rl_softc *sc; 1955 1956 sc = ifp->if_softc; 1957 RL_LOCK(sc); 1958 re_start_locked(ifp); 1959 RL_UNLOCK(sc); 1960} 1961 1962/* 1963 * Main transmit routine for C+ and gigE NICs. 1964 */ 1965static void 1966re_start_locked(ifp) 1967 struct ifnet *ifp; 1968{ 1969 struct rl_softc *sc; 1970 struct mbuf *m_head = NULL; 1971 int idx; 1972 1973 sc = ifp->if_softc; 1974 1975 RL_LOCK_ASSERT(sc); 1976 1977 idx = sc->rl_ldata.rl_tx_prodidx; 1978 1979 while (sc->rl_ldata.rl_tx_mbuf[idx] == NULL) { 1980 IF_DEQUEUE(&ifp->if_snd, m_head); 1981 if (m_head == NULL) 1982 break; 1983 1984 if (re_encap(sc, &m_head, &idx)) { 1985 IF_PREPEND(&ifp->if_snd, m_head); 1986 ifp->if_flags |= IFF_OACTIVE; 1987 break; 1988 } 1989 1990 /* 1991 * If there's a BPF listener, bounce a copy of this frame 1992 * to him. 1993 */ 1994 BPF_MTAP(ifp, m_head); 1995 } 1996 1997 /* Flush the TX descriptors */ 1998 1999 bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag, 2000 sc->rl_ldata.rl_tx_list_map, 2001 BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD); 2002 2003 sc->rl_ldata.rl_tx_prodidx = idx; 2004 2005 /* 2006 * RealTek put the TX poll request register in a different 2007 * location on the 8169 gigE chip. I don't know why. 2008 */ 2009 2010 if (sc->rl_type == RL_8169) 2011 CSR_WRITE_2(sc, RL_GTXSTART, RL_TXSTART_START); 2012 else 2013 CSR_WRITE_2(sc, RL_TXSTART, RL_TXSTART_START); 2014 2015 /* 2016 * Use the countdown timer for interrupt moderation. 2017 * 'TX done' interrupts are disabled. Instead, we reset the 2018 * countdown timer, which will begin counting until it hits 2019 * the value in the TIMERINT register, and then trigger an 2020 * interrupt. Each time we write to the TIMERCNT register, 2021 * the timer count is reset to 0. 2022 */ 2023 CSR_WRITE_4(sc, RL_TIMERCNT, 1); 2024 2025 /* 2026 * Set a timeout in case the chip goes out to lunch. 2027 */ 2028 ifp->if_timer = 5; 2029} 2030 2031static void 2032re_init(xsc) 2033 void *xsc; 2034{ 2035 struct rl_softc *sc = xsc; 2036 2037 RL_LOCK(sc); 2038 re_init_locked(sc); 2039 RL_UNLOCK(sc); 2040} 2041 2042static void 2043re_init_locked(sc) 2044 struct rl_softc *sc; 2045{ 2046 struct ifnet *ifp = &sc->arpcom.ac_if; 2047 struct mii_data *mii; 2048 u_int32_t rxcfg = 0; 2049 2050 RL_LOCK_ASSERT(sc); 2051 2052 mii = device_get_softc(sc->rl_miibus); 2053 2054 /* 2055 * Cancel pending I/O and free all RX/TX buffers. 2056 */ 2057 re_stop(sc); 2058 2059 /* 2060 * Enable C+ RX and TX mode, as well as VLAN stripping and 2061 * RX checksum offload. We must configure the C+ register 2062 * before all others. 2063 */ 2064 CSR_WRITE_2(sc, RL_CPLUS_CMD, RL_CPLUSCMD_RXENB| 2065 RL_CPLUSCMD_TXENB|RL_CPLUSCMD_PCI_MRW| 2066 RL_CPLUSCMD_VLANSTRIP| 2067 (ifp->if_capenable & IFCAP_RXCSUM ? 2068 RL_CPLUSCMD_RXCSUM_ENB : 0)); 2069 2070 /* 2071 * Init our MAC address. Even though the chipset 2072 * documentation doesn't mention it, we need to enter "Config 2073 * register write enable" mode to modify the ID registers. 2074 */ 2075 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_WRITECFG); 2076 CSR_WRITE_STREAM_4(sc, RL_IDR0, 2077 *(u_int32_t *)(&sc->arpcom.ac_enaddr[0])); 2078 CSR_WRITE_STREAM_4(sc, RL_IDR4, 2079 *(u_int32_t *)(&sc->arpcom.ac_enaddr[4])); 2080 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF); 2081 2082 /* 2083 * For C+ mode, initialize the RX descriptors and mbufs. 2084 */ 2085 re_rx_list_init(sc); 2086 re_tx_list_init(sc); 2087 2088 /* 2089 * Enable transmit and receive. 2090 */ 2091 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB); 2092 2093 /* 2094 * Set the initial TX and RX configuration. 2095 */ 2096 if (sc->rl_testmode) { 2097 if (sc->rl_type == RL_8169) 2098 CSR_WRITE_4(sc, RL_TXCFG, 2099 RL_TXCFG_CONFIG|RL_LOOPTEST_ON); 2100 else 2101 CSR_WRITE_4(sc, RL_TXCFG, 2102 RL_TXCFG_CONFIG|RL_LOOPTEST_ON_CPLUS); 2103 } else 2104 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG); 2105 CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG); 2106 2107 /* Set the individual bit to receive frames for this host only. */ 2108 rxcfg = CSR_READ_4(sc, RL_RXCFG); 2109 rxcfg |= RL_RXCFG_RX_INDIV; 2110 2111 /* If we want promiscuous mode, set the allframes bit. */ 2112 if (ifp->if_flags & IFF_PROMISC) 2113 rxcfg |= RL_RXCFG_RX_ALLPHYS; 2114 else 2115 rxcfg &= ~RL_RXCFG_RX_ALLPHYS; 2116 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 2117 2118 /* 2119 * Set capture broadcast bit to capture broadcast frames. 2120 */ 2121 if (ifp->if_flags & IFF_BROADCAST) 2122 rxcfg |= RL_RXCFG_RX_BROAD; 2123 else 2124 rxcfg &= ~RL_RXCFG_RX_BROAD; 2125 CSR_WRITE_4(sc, RL_RXCFG, rxcfg); 2126 2127 /* 2128 * Program the multicast filter, if necessary. 2129 */ 2130 re_setmulti(sc); 2131 2132#ifdef DEVICE_POLLING 2133 /* 2134 * Disable interrupts if we are polling. 2135 */ 2136 if (ifp->if_flags & IFF_POLLING) 2137 CSR_WRITE_2(sc, RL_IMR, 0); 2138 else /* otherwise ... */ 2139#endif /* DEVICE_POLLING */ 2140 /* 2141 * Enable interrupts. 2142 */ 2143 if (sc->rl_testmode) 2144 CSR_WRITE_2(sc, RL_IMR, 0); 2145 else 2146 CSR_WRITE_2(sc, RL_IMR, RL_INTRS_CPLUS); 2147 2148 /* Set initial TX threshold */ 2149 sc->rl_txthresh = RL_TX_THRESH_INIT; 2150 2151 /* Start RX/TX process. */ 2152 CSR_WRITE_4(sc, RL_MISSEDPKT, 0); 2153#ifdef notdef 2154 /* Enable receiver and transmitter. */ 2155 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB); 2156#endif 2157 /* 2158 * Load the addresses of the RX and TX lists into the chip. 2159 */ 2160 2161 CSR_WRITE_4(sc, RL_RXLIST_ADDR_HI, 2162 RL_ADDR_HI(sc->rl_ldata.rl_rx_list_addr)); 2163 CSR_WRITE_4(sc, RL_RXLIST_ADDR_LO, 2164 RL_ADDR_LO(sc->rl_ldata.rl_rx_list_addr)); 2165 2166 CSR_WRITE_4(sc, RL_TXLIST_ADDR_HI, 2167 RL_ADDR_HI(sc->rl_ldata.rl_tx_list_addr)); 2168 CSR_WRITE_4(sc, RL_TXLIST_ADDR_LO, 2169 RL_ADDR_LO(sc->rl_ldata.rl_tx_list_addr)); 2170 2171 CSR_WRITE_1(sc, RL_EARLY_TX_THRESH, 16); 2172 2173 /* 2174 * Initialize the timer interrupt register so that 2175 * a timer interrupt will be generated once the timer 2176 * reaches a certain number of ticks. The timer is 2177 * reloaded on each transmit. This gives us TX interrupt 2178 * moderation, which dramatically improves TX frame rate. 2179 */ 2180 2181 if (sc->rl_type == RL_8169) 2182 CSR_WRITE_4(sc, RL_TIMERINT_8169, 0x800); 2183 else 2184 CSR_WRITE_4(sc, RL_TIMERINT, 0x400); 2185 2186 /* 2187 * For 8169 gigE NICs, set the max allowed RX packet 2188 * size so we can receive jumbo frames. 2189 */ 2190 if (sc->rl_type == RL_8169) 2191 CSR_WRITE_2(sc, RL_MAXRXPKTLEN, 16383); 2192 2193 if (sc->rl_testmode) 2194 return; 2195 2196 mii_mediachg(mii); 2197 2198 CSR_WRITE_1(sc, RL_CFG1, RL_CFG1_DRVLOAD|RL_CFG1_FULLDUPLEX); 2199 2200 ifp->if_flags |= IFF_RUNNING; 2201 ifp->if_flags &= ~IFF_OACTIVE; 2202 2203 sc->rl_stat_ch = timeout(re_tick, sc, hz); 2204} 2205 2206/* 2207 * Set media options. 2208 */ 2209static int 2210re_ifmedia_upd(ifp) 2211 struct ifnet *ifp; 2212{ 2213 struct rl_softc *sc; 2214 struct mii_data *mii; 2215 2216 sc = ifp->if_softc; 2217 mii = device_get_softc(sc->rl_miibus); 2218 mii_mediachg(mii); 2219 2220 return (0); 2221} 2222 2223/* 2224 * Report current media status. 2225 */ 2226static void 2227re_ifmedia_sts(ifp, ifmr) 2228 struct ifnet *ifp; 2229 struct ifmediareq *ifmr; 2230{ 2231 struct rl_softc *sc; 2232 struct mii_data *mii; 2233 2234 sc = ifp->if_softc; 2235 mii = device_get_softc(sc->rl_miibus); 2236 2237 mii_pollstat(mii); 2238 ifmr->ifm_active = mii->mii_media_active; 2239 ifmr->ifm_status = mii->mii_media_status; 2240} 2241 2242static int 2243re_ioctl(ifp, command, data) 2244 struct ifnet *ifp; 2245 u_long command; 2246 caddr_t data; 2247{ 2248 struct rl_softc *sc = ifp->if_softc; 2249 struct ifreq *ifr = (struct ifreq *) data; 2250 struct mii_data *mii; 2251 int error = 0; 2252 2253 switch (command) { 2254 case SIOCSIFMTU: 2255 if (ifr->ifr_mtu > RL_JUMBO_MTU) 2256 error = EINVAL; 2257 ifp->if_mtu = ifr->ifr_mtu; 2258 break; 2259 case SIOCSIFFLAGS: 2260 RL_LOCK(sc); 2261 if (ifp->if_flags & IFF_UP) 2262 re_init_locked(sc); 2263 else if (ifp->if_flags & IFF_RUNNING) 2264 re_stop(sc); 2265 RL_UNLOCK(sc); 2266 error = 0; 2267 break; 2268 case SIOCADDMULTI: 2269 case SIOCDELMULTI: 2270 RL_LOCK(sc); 2271 re_setmulti(sc); 2272 RL_UNLOCK(sc); 2273 error = 0; 2274 break; 2275 case SIOCGIFMEDIA: 2276 case SIOCSIFMEDIA: 2277 mii = device_get_softc(sc->rl_miibus); 2278 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 2279 break; 2280 case SIOCSIFCAP: 2281 ifp->if_capenable &= ~(IFCAP_HWCSUM | IFCAP_POLLING); 2282 ifp->if_capenable |= 2283 ifr->ifr_reqcap & (IFCAP_HWCSUM | IFCAP_POLLING); 2284 if (ifp->if_capenable & IFCAP_TXCSUM) 2285 ifp->if_hwassist = RE_CSUM_FEATURES; 2286 else 2287 ifp->if_hwassist = 0; 2288 if (ifp->if_flags & IFF_RUNNING) 2289 re_init(sc); 2290 break; 2291 default: 2292 error = ether_ioctl(ifp, command, data); 2293 break; 2294 } 2295 2296 return (error); 2297} 2298 2299static void 2300re_watchdog(ifp) 2301 struct ifnet *ifp; 2302{ 2303 struct rl_softc *sc; 2304 2305 sc = ifp->if_softc; 2306 RL_LOCK(sc); 2307 printf("re%d: watchdog timeout\n", sc->rl_unit); 2308 ifp->if_oerrors++; 2309 2310 re_txeof(sc); 2311 re_rxeof(sc); 2312 re_init_locked(sc); 2313 2314 RL_UNLOCK(sc); 2315} 2316 2317/* 2318 * Stop the adapter and free any mbufs allocated to the 2319 * RX and TX lists. 2320 */ 2321static void 2322re_stop(sc) 2323 struct rl_softc *sc; 2324{ 2325 register int i; 2326 struct ifnet *ifp; 2327 2328 RL_LOCK_ASSERT(sc); 2329 2330 ifp = &sc->arpcom.ac_if; 2331 ifp->if_timer = 0; 2332 2333 untimeout(re_tick, sc, sc->rl_stat_ch); 2334 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2335#ifdef DEVICE_POLLING 2336 ether_poll_deregister(ifp); 2337#endif /* DEVICE_POLLING */ 2338 2339 CSR_WRITE_1(sc, RL_COMMAND, 0x00); 2340 CSR_WRITE_2(sc, RL_IMR, 0x0000); 2341 2342 if (sc->rl_head != NULL) { 2343 m_freem(sc->rl_head); 2344 sc->rl_head = sc->rl_tail = NULL; 2345 } 2346 2347 /* Free the TX list buffers. */ 2348 2349 for (i = 0; i < RL_TX_DESC_CNT; i++) { 2350 if (sc->rl_ldata.rl_tx_mbuf[i] != NULL) { 2351 bus_dmamap_unload(sc->rl_ldata.rl_mtag, 2352 sc->rl_ldata.rl_tx_dmamap[i]); 2353 m_freem(sc->rl_ldata.rl_tx_mbuf[i]); 2354 sc->rl_ldata.rl_tx_mbuf[i] = NULL; 2355 } 2356 } 2357 2358 /* Free the RX list buffers. */ 2359 2360 for (i = 0; i < RL_RX_DESC_CNT; i++) { 2361 if (sc->rl_ldata.rl_rx_mbuf[i] != NULL) { 2362 bus_dmamap_unload(sc->rl_ldata.rl_mtag, 2363 sc->rl_ldata.rl_rx_dmamap[i]); 2364 m_freem(sc->rl_ldata.rl_rx_mbuf[i]); 2365 sc->rl_ldata.rl_rx_mbuf[i] = NULL; 2366 } 2367 } 2368} 2369 2370/* 2371 * Device suspend routine. Stop the interface and save some PCI 2372 * settings in case the BIOS doesn't restore them properly on 2373 * resume. 2374 */ 2375static int 2376re_suspend(dev) 2377 device_t dev; 2378{ 2379 struct rl_softc *sc; 2380 2381 sc = device_get_softc(dev); 2382 2383 RL_LOCK(sc); 2384 re_stop(sc); 2385 sc->suspended = 1; 2386 RL_UNLOCK(sc); 2387 2388 return (0); 2389} 2390 2391/* 2392 * Device resume routine. Restore some PCI settings in case the BIOS 2393 * doesn't, re-enable busmastering, and restart the interface if 2394 * appropriate. 2395 */ 2396static int 2397re_resume(dev) 2398 device_t dev; 2399{ 2400 struct rl_softc *sc; 2401 struct ifnet *ifp; 2402 2403 sc = device_get_softc(dev); 2404 2405 RL_LOCK(sc); 2406 2407 ifp = &sc->arpcom.ac_if; 2408 2409 /* reinitialize interface if necessary */ 2410 if (ifp->if_flags & IFF_UP) 2411 re_init_locked(sc); 2412 2413 sc->suspended = 0; 2414 RL_UNLOCK(sc); 2415 2416 return (0); 2417} 2418 2419/* 2420 * Stop all chip I/O so that the kernel's probe routines don't 2421 * get confused by errant DMAs when rebooting. 2422 */ 2423static void 2424re_shutdown(dev) 2425 device_t dev; 2426{ 2427 struct rl_softc *sc; 2428 2429 sc = device_get_softc(dev); 2430 2431 RL_LOCK(sc); 2432 re_stop(sc); 2433 RL_UNLOCK(sc); 2434} 2435