1 /* 2 * Copyright (c) 2004 3 * Joerg Sonnenberger <joerg@bec.de>. All rights reserved. 4 * 5 * Copyright (c) 1997, 1998-2003 6 * Bill Paul <wpaul@windriver.com>. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Bill Paul. 19 * 4. Neither the name of the author nor the names of any co-contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 33 * THE POSSIBILITY OF SUCH DAMAGE. 34 * 35 * $FreeBSD: src/sys/dev/re/if_re.c,v 1.25 2004/06/09 14:34:01 naddy Exp $ 36 * $DragonFly: src/sys/dev/netif/re/if_re.c,v 1.9 2005/02/12 04:07:34 joerg Exp $ 37 */ 38 39 /* 40 * RealTek 8139C+/8169/8169S/8110S PCI NIC driver 41 * 42 * Written by Bill Paul <wpaul@windriver.com> 43 * Senior Networking Software Engineer 44 * Wind River Systems 45 */ 46 47 /* 48 * This driver is designed to support RealTek's next generation of 49 * 10/100 and 10/100/1000 PCI ethernet controllers. There are currently 50 * four devices in this family: the RTL8139C+, the RTL8169, the RTL8169S 51 * and the RTL8110S. 52 * 53 * The 8139C+ is a 10/100 ethernet chip. It is backwards compatible 54 * with the older 8139 family, however it also supports a special 55 * C+ mode of operation that provides several new performance enhancing 56 * features. These include: 57 * 58 * o Descriptor based DMA mechanism. Each descriptor represents 59 * a single packet fragment. Data buffers may be aligned on 60 * any byte boundary. 61 * 62 * o 64-bit DMA 63 * 64 * o TCP/IP checksum offload for both RX and TX 65 * 66 * o High and normal priority transmit DMA rings 67 * 68 * o VLAN tag insertion and extraction 69 * 70 * o TCP large send (segmentation offload) 71 * 72 * Like the 8139, the 8139C+ also has a built-in 10/100 PHY. The C+ 73 * programming API is fairly straightforward. The RX filtering, EEPROM 74 * access and PHY access is the same as it is on the older 8139 series 75 * chips. 76 * 77 * The 8169 is a 64-bit 10/100/1000 gigabit ethernet MAC. It has almost the 78 * same programming API and feature set as the 8139C+ with the following 79 * differences and additions: 80 * 81 * o 1000Mbps mode 82 * 83 * o Jumbo frames 84 * 85 * o GMII and TBI ports/registers for interfacing with copper 86 * or fiber PHYs 87 * 88 * o RX and TX DMA rings can have up to 1024 descriptors 89 * (the 8139C+ allows a maximum of 64) 90 * 91 * o Slight differences in register layout from the 8139C+ 92 * 93 * The TX start and timer interrupt registers are at different locations 94 * on the 8169 than they are on the 8139C+. Also, the status word in the 95 * RX descriptor has a slightly different bit layout. The 8169 does not 96 * have a built-in PHY. Most reference boards use a Marvell 88E1000 'Alaska' 97 * copper gigE PHY. 98 * 99 * The 8169S/8110S 10/100/1000 devices have built-in copper gigE PHYs 100 * (the 'S' stands for 'single-chip'). These devices have the same 101 * programming API as the older 8169, but also have some vendor-specific 102 * registers for the on-board PHY. The 8110S is a LAN-on-motherboard 103 * part designed to be pin-compatible with the RealTek 8100 10/100 chip. 104 * 105 * This driver takes advantage of the RX and TX checksum offload and 106 * VLAN tag insertion/extraction features. It also implements TX 107 * interrupt moderation using the timer interrupt registers, which 108 * significantly reduces TX interrupt load. There is also support 109 * for jumbo frames, however the 8169/8169S/8110S can not transmit 110 * jumbo frames larger than 7.5K, so the max MTU possible with this 111 * driver is 7500 bytes. 112 */ 113 114 #include <sys/param.h> 115 #include <sys/endian.h> 116 #include <sys/systm.h> 117 #include <sys/sockio.h> 118 #include <sys/mbuf.h> 119 #include <sys/malloc.h> 120 #include <sys/module.h> 121 #include <sys/kernel.h> 122 #include <sys/socket.h> 123 124 #include <net/if.h> 125 #include <net/ifq_var.h> 126 #include <net/if_arp.h> 127 #include <net/ethernet.h> 128 #include <net/if_dl.h> 129 #include <net/if_media.h> 130 #include <net/if_types.h> 131 #include <net/vlan/if_vlan_var.h> 132 133 #include <net/bpf.h> 134 135 #include <machine/bus_pio.h> 136 #include <machine/bus_memio.h> 137 #include <machine/bus.h> 138 #include <machine/resource.h> 139 #include <sys/bus.h> 140 #include <sys/rman.h> 141 142 #include <dev/netif/mii_layer/mii.h> 143 #include <dev/netif/mii_layer/miivar.h> 144 145 #include <bus/pci/pcireg.h> 146 #include <bus/pci/pcivar.h> 147 148 /* "controller miibus0" required. See GENERIC if you get errors here. */ 149 #include "miibus_if.h" 150 151 #include <dev/netif/re/if_rereg.h> 152 153 /* 154 * The hardware supports checksumming but, as usual, some chipsets screw it 155 * all up and produce bogus packets, so we disable it by default. 156 */ 157 #define RE_CSUM_FEATURES (CSUM_IP | CSUM_TCP | CSUM_UDP) 158 #define RE_DISABLE_HWCSUM 159 160 /* 161 * Various supported device vendors/types and their names. 162 */ 163 static struct re_type re_devs[] = { 164 { RT_VENDORID, RT_DEVICEID_8139, RE_HWREV_8139CPLUS, 165 "RealTek 8139C+ 10/100BaseTX" }, 166 { RT_VENDORID, RT_DEVICEID_8169, RE_HWREV_8169, 167 "RealTek 8169 Gigabit Ethernet" }, 168 { RT_VENDORID, RT_DEVICEID_8169, RE_HWREV_8169S, 169 "RealTek 8169S Single-chip Gigabit Ethernet" }, 170 { RT_VENDORID, RT_DEVICEID_8169, RE_HWREV_8110S, 171 "RealTek 8110S Single-chip Gigabit Ethernet" }, 172 { 0, 0, 0, NULL } 173 }; 174 175 static struct re_hwrev re_hwrevs[] = { 176 { RE_HWREV_8139CPLUS, RE_8139CPLUS, "C+"}, 177 { RE_HWREV_8169, RE_8169, "8169"}, 178 { RE_HWREV_8169S, RE_8169, "8169S"}, 179 { RE_HWREV_8110S, RE_8169, "8110S"}, 180 { 0, 0, NULL } 181 }; 182 183 static int re_probe(device_t); 184 static int re_attach(device_t); 185 static int re_detach(device_t); 186 187 static int re_encap(struct re_softc *, struct mbuf *, int *); 188 189 static void re_dma_map_addr(void *, bus_dma_segment_t *, int, int); 190 static void re_dma_map_desc(void *, bus_dma_segment_t *, int, 191 bus_size_t, int); 192 static int re_allocmem(device_t, struct re_softc *); 193 static int re_newbuf(struct re_softc *, int, struct mbuf *); 194 static int re_rx_list_init(struct re_softc *); 195 static int re_tx_list_init(struct re_softc *); 196 static void re_rxeof(struct re_softc *); 197 static void re_txeof(struct re_softc *); 198 static void re_intr(void *); 199 static void re_tick(void *); 200 static void re_start(struct ifnet *); 201 static int re_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *); 202 static void re_init(void *); 203 static void re_stop(struct re_softc *); 204 static void re_watchdog(struct ifnet *); 205 static int re_suspend(device_t); 206 static int re_resume(device_t); 207 static void re_shutdown(device_t); 208 static int re_ifmedia_upd(struct ifnet *); 209 static void re_ifmedia_sts(struct ifnet *, struct ifmediareq *); 210 211 static void re_eeprom_putbyte(struct re_softc *, int); 212 static void re_eeprom_getword(struct re_softc *, int, u_int16_t *); 213 static void re_read_eeprom(struct re_softc *, caddr_t, int, int, int); 214 static int re_gmii_readreg(device_t, int, int); 215 static int re_gmii_writereg(device_t, int, int, int); 216 217 static int re_miibus_readreg(device_t, int, int); 218 static int re_miibus_writereg(device_t, int, int, int); 219 static void re_miibus_statchg(device_t); 220 221 static void re_setmulti(struct re_softc *); 222 static void re_reset(struct re_softc *); 223 224 static int re_diag(struct re_softc *); 225 226 static device_method_t re_methods[] = { 227 /* Device interface */ 228 DEVMETHOD(device_probe, re_probe), 229 DEVMETHOD(device_attach, re_attach), 230 DEVMETHOD(device_detach, re_detach), 231 DEVMETHOD(device_suspend, re_suspend), 232 DEVMETHOD(device_resume, re_resume), 233 DEVMETHOD(device_shutdown, re_shutdown), 234 235 /* bus interface */ 236 DEVMETHOD(bus_print_child, bus_generic_print_child), 237 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 238 239 /* MII interface */ 240 DEVMETHOD(miibus_readreg, re_miibus_readreg), 241 DEVMETHOD(miibus_writereg, re_miibus_writereg), 242 DEVMETHOD(miibus_statchg, re_miibus_statchg), 243 244 { 0, 0 } 245 }; 246 247 static driver_t re_driver = { 248 "re", 249 re_methods, 250 sizeof(struct re_softc) 251 }; 252 253 static devclass_t re_devclass; 254 255 DECLARE_DUMMY_MODULE(if_re); 256 DRIVER_MODULE(if_re, pci, re_driver, re_devclass, 0, 0); 257 DRIVER_MODULE(if_re, cardbus, re_driver, re_devclass, 0, 0); 258 DRIVER_MODULE(miibus, re, miibus_driver, miibus_devclass, 0, 0); 259 260 #define EE_SET(x) \ 261 CSR_WRITE_1(sc, RE_EECMD, CSR_READ_1(sc, RE_EECMD) | (x)) 262 263 #define EE_CLR(x) \ 264 CSR_WRITE_1(sc, RE_EECMD, CSR_READ_1(sc, RE_EECMD) & ~(x)) 265 266 /* 267 * Send a read command and address to the EEPROM, check for ACK. 268 */ 269 static void 270 re_eeprom_putbyte(struct re_softc *sc, int addr) 271 { 272 int d, i; 273 274 d = addr | sc->re_eecmd_read; 275 276 /* 277 * Feed in each bit and strobe the clock. 278 */ 279 for (i = 0x400; i != 0; i >>= 1) { 280 if (d & i) 281 EE_SET(RE_EE_DATAIN); 282 else 283 EE_CLR(RE_EE_DATAIN); 284 DELAY(100); 285 EE_SET(RE_EE_CLK); 286 DELAY(150); 287 EE_CLR(RE_EE_CLK); 288 DELAY(100); 289 } 290 } 291 292 /* 293 * Read a word of data stored in the EEPROM at address 'addr.' 294 */ 295 static void 296 re_eeprom_getword(struct re_softc *sc, int addr, uint16_t *dest) 297 { 298 int i; 299 uint16_t word = 0; 300 301 /* Enter EEPROM access mode. */ 302 CSR_WRITE_1(sc, RE_EECMD, RE_EEMODE_PROGRAM|RE_EE_SEL); 303 304 /* 305 * Send address of word we want to read. 306 */ 307 re_eeprom_putbyte(sc, addr); 308 309 CSR_WRITE_1(sc, RE_EECMD, RE_EEMODE_PROGRAM|RE_EE_SEL); 310 311 /* 312 * Start reading bits from EEPROM. 313 */ 314 for (i = 0x8000; i != 0; i >>= 1) { 315 EE_SET(RE_EE_CLK); 316 DELAY(100); 317 if (CSR_READ_1(sc, RE_EECMD) & RE_EE_DATAOUT) 318 word |= i; 319 EE_CLR(RE_EE_CLK); 320 DELAY(100); 321 } 322 323 /* Turn off EEPROM access mode. */ 324 CSR_WRITE_1(sc, RE_EECMD, RE_EEMODE_OFF); 325 326 *dest = word; 327 } 328 329 /* 330 * Read a sequence of words from the EEPROM. 331 */ 332 static void 333 re_read_eeprom(struct re_softc *sc, caddr_t dest, int off, int cnt, int swap) 334 { 335 int i; 336 uint16_t word = 0, *ptr; 337 338 for (i = 0; i < cnt; i++) { 339 re_eeprom_getword(sc, off + i, &word); 340 ptr = (u_int16_t *)(dest + (i * 2)); 341 if (swap) 342 *ptr = be16toh(word); 343 else 344 *ptr = word; 345 } 346 } 347 348 static int 349 re_gmii_readreg(device_t dev, int phy, int reg) 350 { 351 struct re_softc *sc = device_get_softc(dev); 352 u_int32_t rval; 353 int i; 354 355 if (phy != 1) 356 return(0); 357 358 /* Let the rgephy driver read the GMEDIASTAT register */ 359 360 if (reg == RE_GMEDIASTAT) 361 return(CSR_READ_1(sc, RE_GMEDIASTAT)); 362 363 CSR_WRITE_4(sc, RE_PHYAR, reg << 16); 364 DELAY(1000); 365 366 for (i = 0; i < RE_TIMEOUT; i++) { 367 rval = CSR_READ_4(sc, RE_PHYAR); 368 if (rval & RE_PHYAR_BUSY) 369 break; 370 DELAY(100); 371 } 372 373 if (i == RE_TIMEOUT) { 374 device_printf(dev, "PHY read failed\n"); 375 return(0); 376 } 377 378 return(rval & RE_PHYAR_PHYDATA); 379 } 380 381 static int 382 re_gmii_writereg(device_t dev, int phy, int reg, int data) 383 { 384 struct re_softc *sc = device_get_softc(dev); 385 uint32_t rval; 386 int i; 387 388 CSR_WRITE_4(sc, RE_PHYAR, 389 (reg << 16) | (data & RE_PHYAR_PHYDATA) | RE_PHYAR_BUSY); 390 DELAY(1000); 391 392 for (i = 0; i < RE_TIMEOUT; i++) { 393 rval = CSR_READ_4(sc, RE_PHYAR); 394 if ((rval & RE_PHYAR_BUSY) == 0) 395 break; 396 DELAY(100); 397 } 398 399 if (i == RE_TIMEOUT) 400 device_printf(dev, "PHY write failed\n"); 401 402 return(0); 403 } 404 405 static int 406 re_miibus_readreg(device_t dev, int phy, int reg) 407 { 408 struct re_softc *sc = device_get_softc(dev); 409 uint16_t rval = 0; 410 uint16_t re8139_reg = 0; 411 412 if (sc->re_type == RE_8169) { 413 rval = re_gmii_readreg(dev, phy, reg); 414 return(rval); 415 } 416 417 /* Pretend the internal PHY is only at address 0 */ 418 if (phy) 419 return(0); 420 421 switch(reg) { 422 case MII_BMCR: 423 re8139_reg = RE_BMCR; 424 break; 425 case MII_BMSR: 426 re8139_reg = RE_BMSR; 427 break; 428 case MII_ANAR: 429 re8139_reg = RE_ANAR; 430 break; 431 case MII_ANER: 432 re8139_reg = RE_ANER; 433 break; 434 case MII_ANLPAR: 435 re8139_reg = RE_LPAR; 436 break; 437 case MII_PHYIDR1: 438 case MII_PHYIDR2: 439 return(0); 440 /* 441 * Allow the rlphy driver to read the media status 442 * register. If we have a link partner which does not 443 * support NWAY, this is the register which will tell 444 * us the results of parallel detection. 445 */ 446 case RE_MEDIASTAT: 447 return(CSR_READ_1(sc, RE_MEDIASTAT)); 448 default: 449 device_printf(dev, "bad phy register\n"); 450 return(0); 451 } 452 rval = CSR_READ_2(sc, re8139_reg); 453 return(rval); 454 } 455 456 static int 457 re_miibus_writereg(device_t dev, int phy, int reg, int data) 458 { 459 struct re_softc *sc= device_get_softc(dev); 460 u_int16_t re8139_reg = 0; 461 462 if (sc->re_type == RE_8169) 463 return(re_gmii_writereg(dev, phy, reg, data)); 464 465 /* Pretend the internal PHY is only at address 0 */ 466 if (phy) 467 return(0); 468 469 switch(reg) { 470 case MII_BMCR: 471 re8139_reg = RE_BMCR; 472 break; 473 case MII_BMSR: 474 re8139_reg = RE_BMSR; 475 break; 476 case MII_ANAR: 477 re8139_reg = RE_ANAR; 478 break; 479 case MII_ANER: 480 re8139_reg = RE_ANER; 481 break; 482 case MII_ANLPAR: 483 re8139_reg = RE_LPAR; 484 break; 485 case MII_PHYIDR1: 486 case MII_PHYIDR2: 487 return(0); 488 default: 489 device_printf(dev, "bad phy register\n"); 490 return(0); 491 } 492 CSR_WRITE_2(sc, re8139_reg, data); 493 return(0); 494 } 495 496 static void 497 re_miibus_statchg(device_t dev) 498 { 499 } 500 501 /* 502 * Program the 64-bit multicast hash filter. 503 */ 504 static void 505 re_setmulti(struct re_softc *sc) 506 { 507 struct ifnet *ifp = &sc->arpcom.ac_if; 508 int h = 0; 509 uint32_t hashes[2] = { 0, 0 }; 510 struct ifmultiaddr *ifma; 511 uint32_t rxfilt; 512 int mcnt = 0; 513 514 rxfilt = CSR_READ_4(sc, RE_RXCFG); 515 516 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { 517 rxfilt |= RE_RXCFG_RX_MULTI; 518 CSR_WRITE_4(sc, RE_RXCFG, rxfilt); 519 CSR_WRITE_4(sc, RE_MAR0, 0xFFFFFFFF); 520 CSR_WRITE_4(sc, RE_MAR4, 0xFFFFFFFF); 521 return; 522 } 523 524 /* first, zot all the existing hash bits */ 525 CSR_WRITE_4(sc, RE_MAR0, 0); 526 CSR_WRITE_4(sc, RE_MAR4, 0); 527 528 /* now program new ones */ 529 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 530 if (ifma->ifma_addr->sa_family != AF_LINK) 531 continue; 532 h = ether_crc32_be(LLADDR((struct sockaddr_dl *) 533 ifma->ifma_addr), ETHER_ADDR_LEN) >> 26; 534 if (h < 32) 535 hashes[0] |= (1 << h); 536 else 537 hashes[1] |= (1 << (h - 32)); 538 mcnt++; 539 } 540 541 if (mcnt) 542 rxfilt |= RE_RXCFG_RX_MULTI; 543 else 544 rxfilt &= ~RE_RXCFG_RX_MULTI; 545 546 CSR_WRITE_4(sc, RE_RXCFG, rxfilt); 547 CSR_WRITE_4(sc, RE_MAR0, hashes[0]); 548 CSR_WRITE_4(sc, RE_MAR4, hashes[1]); 549 } 550 551 static void 552 re_reset(struct re_softc *sc) 553 { 554 int i; 555 556 CSR_WRITE_1(sc, RE_COMMAND, RE_CMD_RESET); 557 558 for (i = 0; i < RE_TIMEOUT; i++) { 559 DELAY(10); 560 if ((CSR_READ_1(sc, RE_COMMAND) & RE_CMD_RESET) == 0) 561 break; 562 } 563 if (i == RE_TIMEOUT) 564 if_printf(&sc->arpcom.ac_if, "reset never completed!\n"); 565 566 CSR_WRITE_1(sc, 0x82, 1); 567 } 568 569 /* 570 * The following routine is designed to test for a defect on some 571 * 32-bit 8169 cards. Some of these NICs have the REQ64# and ACK64# 572 * lines connected to the bus, however for a 32-bit only card, they 573 * should be pulled high. The result of this defect is that the 574 * NIC will not work right if you plug it into a 64-bit slot: DMA 575 * operations will be done with 64-bit transfers, which will fail 576 * because the 64-bit data lines aren't connected. 577 * 578 * There's no way to work around this (short of talking a soldering 579 * iron to the board), however we can detect it. The method we use 580 * here is to put the NIC into digital loopback mode, set the receiver 581 * to promiscuous mode, and then try to send a frame. We then compare 582 * the frame data we sent to what was received. If the data matches, 583 * then the NIC is working correctly, otherwise we know the user has 584 * a defective NIC which has been mistakenly plugged into a 64-bit PCI 585 * slot. In the latter case, there's no way the NIC can work correctly, 586 * so we print out a message on the console and abort the device attach. 587 */ 588 589 static int 590 re_diag(struct re_softc *sc) 591 { 592 struct ifnet *ifp = &sc->arpcom.ac_if; 593 struct mbuf *m0; 594 struct ether_header *eh; 595 struct re_desc *cur_rx; 596 uint16_t status; 597 uint32_t rxstat; 598 int total_len, i, error = 0; 599 uint8_t dst[ETHER_ADDR_LEN] = { 0x00, 'h', 'e', 'l', 'l', 'o' }; 600 uint8_t src[ETHER_ADDR_LEN] = { 0x00, 'w', 'o', 'r', 'l', 'd' }; 601 602 /* Allocate a single mbuf */ 603 604 MGETHDR(m0, MB_DONTWAIT, MT_DATA); 605 if (m0 == NULL) 606 return(ENOBUFS); 607 608 /* 609 * Initialize the NIC in test mode. This sets the chip up 610 * so that it can send and receive frames, but performs the 611 * following special functions: 612 * - Puts receiver in promiscuous mode 613 * - Enables digital loopback mode 614 * - Leaves interrupts turned off 615 */ 616 617 ifp->if_flags |= IFF_PROMISC; 618 sc->re_testmode = 1; 619 re_init(sc); 620 re_stop(sc); 621 DELAY(100000); 622 re_init(sc); 623 624 /* Put some data in the mbuf */ 625 626 eh = mtod(m0, struct ether_header *); 627 bcopy (dst, eh->ether_dhost, ETHER_ADDR_LEN); 628 bcopy (src, eh->ether_shost, ETHER_ADDR_LEN); 629 eh->ether_type = htons(ETHERTYPE_IP); 630 m0->m_pkthdr.len = m0->m_len = ETHER_MIN_LEN - ETHER_CRC_LEN; 631 632 /* 633 * Queue the packet, start transmission. 634 * Note: ifq_handoff() ultimately calls re_start() for us. 635 */ 636 637 CSR_WRITE_2(sc, RE_ISR, 0xFFFF); 638 error = ifq_handoff(ifp, m0, NULL); 639 if (error) { 640 m0 = NULL; 641 goto done; 642 } 643 m0 = NULL; 644 645 /* Wait for it to propagate through the chip */ 646 647 DELAY(100000); 648 for (i = 0; i < RE_TIMEOUT; i++) { 649 status = CSR_READ_2(sc, RE_ISR); 650 if ((status & (RE_ISR_TIMEOUT_EXPIRED|RE_ISR_RX_OK)) == 651 (RE_ISR_TIMEOUT_EXPIRED|RE_ISR_RX_OK)) 652 break; 653 DELAY(10); 654 } 655 656 if (i == RE_TIMEOUT) { 657 if_printf(ifp, "diagnostic failed to receive packet " 658 "in loopback mode\n"); 659 error = EIO; 660 goto done; 661 } 662 663 /* 664 * The packet should have been dumped into the first 665 * entry in the RX DMA ring. Grab it from there. 666 */ 667 668 bus_dmamap_sync(sc->re_ldata.re_rx_list_tag, 669 sc->re_ldata.re_rx_list_map, BUS_DMASYNC_POSTREAD); 670 bus_dmamap_sync(sc->re_ldata.re_mtag, sc->re_ldata.re_rx_dmamap[0], 671 BUS_DMASYNC_POSTWRITE); 672 bus_dmamap_unload(sc->re_ldata.re_mtag, sc->re_ldata.re_rx_dmamap[0]); 673 674 m0 = sc->re_ldata.re_rx_mbuf[0]; 675 sc->re_ldata.re_rx_mbuf[0] = NULL; 676 eh = mtod(m0, struct ether_header *); 677 678 cur_rx = &sc->re_ldata.re_rx_list[0]; 679 total_len = RE_RXBYTES(cur_rx); 680 rxstat = le32toh(cur_rx->re_cmdstat); 681 682 if (total_len != ETHER_MIN_LEN) { 683 if_printf(ifp, "diagnostic failed, received short packet\n"); 684 error = EIO; 685 goto done; 686 } 687 688 /* Test that the received packet data matches what we sent. */ 689 690 if (bcmp(eh->ether_dhost, dst, ETHER_ADDR_LEN) || 691 bcmp(eh->ether_shost, &src, ETHER_ADDR_LEN) || 692 be16toh(eh->ether_type) != ETHERTYPE_IP) { 693 if_printf(ifp, "WARNING, DMA FAILURE!\n"); 694 if_printf(ifp, "expected TX data: %6D/%6D/0x%x\n", 695 dst, ":", src, ":", ETHERTYPE_IP); 696 if_printf(ifp, "received RX data: %6D/%6D/0x%x\n", 697 eh->ether_dhost, ":", eh->ether_shost, ":", 698 ntohs(eh->ether_type)); 699 if_printf(ifp, "You may have a defective 32-bit NIC plugged " 700 "into a 64-bit PCI slot.\n"); 701 if_printf(ifp, "Please re-install the NIC in a 32-bit slot " 702 "for proper operation.\n"); 703 if_printf(ifp, "Read the re(4) man page for more details.\n"); 704 error = EIO; 705 } 706 707 done: 708 /* Turn interface off, release resources */ 709 710 sc->re_testmode = 0; 711 ifp->if_flags &= ~IFF_PROMISC; 712 re_stop(sc); 713 if (m0 != NULL) 714 m_freem(m0); 715 716 return (error); 717 } 718 719 /* 720 * Probe for a RealTek 8139C+/8169/8110 chip. Check the PCI vendor and device 721 * IDs against our list and return a device name if we find a match. 722 */ 723 static int 724 re_probe(device_t dev) 725 { 726 struct re_type *t; 727 struct re_softc *sc; 728 int rid; 729 uint32_t hwrev; 730 uint16_t vendor, product; 731 732 t = re_devs; 733 734 vendor = pci_get_vendor(dev); 735 product = pci_get_device(dev); 736 737 for (t = re_devs; t->re_name != NULL; t++) { 738 if (product == t->re_did && vendor == t->re_vid) 739 break; 740 } 741 742 /* 743 * Check if we found a RealTek device. 744 */ 745 if (t->re_name == NULL) 746 return(ENXIO); 747 748 /* 749 * Temporarily map the I/O space so we can read the chip ID register. 750 */ 751 sc = malloc(sizeof(*sc), M_TEMP, M_WAITOK | M_ZERO); 752 rid = RE_PCI_LOIO; 753 sc->re_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 754 RF_ACTIVE); 755 if (sc->re_res == NULL) { 756 device_printf(dev, "couldn't map ports/memory\n"); 757 free(sc, M_TEMP); 758 return(ENXIO); 759 } 760 761 sc->re_btag = rman_get_bustag(sc->re_res); 762 sc->re_bhandle = rman_get_bushandle(sc->re_res); 763 764 hwrev = CSR_READ_4(sc, RE_TXCFG) & RE_TXCFG_HWREV; 765 bus_release_resource(dev, SYS_RES_IOPORT, RE_PCI_LOIO, sc->re_res); 766 free(sc, M_TEMP); 767 768 /* 769 * and continue matching for the specific chip... 770 */ 771 for (; t->re_name != NULL; t++) { 772 if (product == t->re_did && vendor == t->re_vid && 773 t->re_basetype == hwrev) { 774 device_set_desc(dev, t->re_name); 775 return(0); 776 } 777 } 778 return(ENXIO); 779 } 780 781 /* 782 * This routine takes the segment list provided as the result of 783 * a bus_dma_map_load() operation and assigns the addresses/lengths 784 * to RealTek DMA descriptors. This can be called either by the RX 785 * code or the TX code. In the RX case, we'll probably wind up mapping 786 * at most one segment. For the TX case, there could be any number of 787 * segments since TX packets may span multiple mbufs. In either case, 788 * if the number of segments is larger than the re_maxsegs limit 789 * specified by the caller, we abort the mapping operation. Sadly, 790 * whoever designed the buffer mapping API did not provide a way to 791 * return an error from here, so we have to fake it a bit. 792 */ 793 794 static void 795 re_dma_map_desc(void *arg, bus_dma_segment_t *segs, int nseg, 796 bus_size_t mapsize, int error) 797 { 798 struct re_dmaload_arg *ctx; 799 struct re_desc *d = NULL; 800 int i = 0, idx; 801 uint32_t cmdstat; 802 803 if (error) 804 return; 805 806 ctx = arg; 807 808 /* Signal error to caller if there's too many segments */ 809 if (nseg > ctx->re_maxsegs) { 810 ctx->re_maxsegs = 0; 811 return; 812 } 813 814 /* 815 * Map the segment array into descriptors. Note that we set the 816 * start-of-frame and end-of-frame markers for either TX or RX, but 817 * they really only have meaning in the TX case. (In the RX case, 818 * it's the chip that tells us where packets begin and end.) 819 * We also keep track of the end of the ring and set the 820 * end-of-ring bits as needed, and we set the ownership bits 821 * in all except the very first descriptor. (The caller will 822 * set this descriptor later when it start transmission or 823 * reception.) 824 */ 825 idx = ctx->re_idx; 826 for (;;) { 827 d = &ctx->re_ring[idx]; 828 if (le32toh(d->re_cmdstat) & RE_RDESC_STAT_OWN) { 829 ctx->re_maxsegs = 0; 830 return; 831 } 832 cmdstat = segs[i].ds_len; 833 d->re_bufaddr_lo = htole32(RE_ADDR_LO(segs[i].ds_addr)); 834 d->re_bufaddr_hi = htole32(RE_ADDR_HI(segs[i].ds_addr)); 835 if (i == 0) 836 cmdstat |= RE_TDESC_CMD_SOF; 837 else 838 cmdstat |= RE_TDESC_CMD_OWN; 839 if (idx == (RE_RX_DESC_CNT - 1)) 840 cmdstat |= RE_TDESC_CMD_EOR; 841 d->re_cmdstat = htole32(cmdstat | ctx->re_flags); 842 i++; 843 if (i == nseg) 844 break; 845 RE_DESC_INC(idx); 846 } 847 848 d->re_cmdstat |= htole32(RE_TDESC_CMD_EOF); 849 ctx->re_maxsegs = nseg; 850 ctx->re_idx = idx; 851 } 852 853 /* 854 * Map a single buffer address. 855 */ 856 857 static void 858 re_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 859 { 860 uint32_t *addr; 861 862 if (error) 863 return; 864 865 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 866 addr = arg; 867 *addr = segs->ds_addr; 868 } 869 870 static int 871 re_allocmem(device_t dev, struct re_softc *sc) 872 { 873 int error, i, nseg; 874 875 /* 876 * Allocate map for RX mbufs. 877 */ 878 nseg = 32; 879 error = bus_dma_tag_create(sc->re_parent_tag, ETHER_ALIGN, 0, 880 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, 881 NULL, MCLBYTES * nseg, nseg, MCLBYTES, BUS_DMA_ALLOCNOW, 882 &sc->re_ldata.re_mtag); 883 if (error) { 884 device_printf(dev, "could not allocate dma tag\n"); 885 return(error); 886 } 887 888 /* 889 * Allocate map for TX descriptor list. 890 */ 891 error = bus_dma_tag_create(sc->re_parent_tag, RE_RING_ALIGN, 892 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, 893 NULL, RE_TX_LIST_SZ, 1, RE_TX_LIST_SZ, BUS_DMA_ALLOCNOW, 894 &sc->re_ldata.re_tx_list_tag); 895 if (error) { 896 device_printf(dev, "could not allocate dma tag\n"); 897 return(error); 898 } 899 900 /* Allocate DMA'able memory for the TX ring */ 901 902 error = bus_dmamem_alloc(sc->re_ldata.re_tx_list_tag, 903 (void **)&sc->re_ldata.re_tx_list, BUS_DMA_WAITOK | BUS_DMA_ZERO, 904 &sc->re_ldata.re_tx_list_map); 905 if (error) { 906 device_printf(dev, "could not allocate TX ring\n"); 907 return(error); 908 } 909 910 /* Load the map for the TX ring. */ 911 912 error = bus_dmamap_load(sc->re_ldata.re_tx_list_tag, 913 sc->re_ldata.re_tx_list_map, sc->re_ldata.re_tx_list, 914 RE_TX_LIST_SZ, re_dma_map_addr, 915 &sc->re_ldata.re_tx_list_addr, BUS_DMA_NOWAIT); 916 if (error) { 917 device_printf(dev, "could not get addres of TX ring\n"); 918 return(error); 919 } 920 921 /* Create DMA maps for TX buffers */ 922 923 for (i = 0; i < RE_TX_DESC_CNT; i++) { 924 error = bus_dmamap_create(sc->re_ldata.re_mtag, 0, 925 &sc->re_ldata.re_tx_dmamap[i]); 926 if (error) { 927 device_printf(dev, "can't create DMA map for TX\n"); 928 return(error); 929 } 930 } 931 932 /* 933 * Allocate map for RX descriptor list. 934 */ 935 error = bus_dma_tag_create(sc->re_parent_tag, RE_RING_ALIGN, 936 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, 937 NULL, RE_TX_LIST_SZ, 1, RE_TX_LIST_SZ, BUS_DMA_ALLOCNOW, 938 &sc->re_ldata.re_rx_list_tag); 939 if (error) { 940 device_printf(dev, "could not allocate dma tag\n"); 941 return(error); 942 } 943 944 /* Allocate DMA'able memory for the RX ring */ 945 946 error = bus_dmamem_alloc(sc->re_ldata.re_rx_list_tag, 947 (void **)&sc->re_ldata.re_rx_list, BUS_DMA_WAITOK | BUS_DMA_ZERO, 948 &sc->re_ldata.re_rx_list_map); 949 if (error) { 950 device_printf(dev, "could not allocate RX ring\n"); 951 return(error); 952 } 953 954 /* Load the map for the RX ring. */ 955 956 error = bus_dmamap_load(sc->re_ldata.re_rx_list_tag, 957 sc->re_ldata.re_rx_list_map, sc->re_ldata.re_rx_list, 958 RE_TX_LIST_SZ, re_dma_map_addr, 959 &sc->re_ldata.re_rx_list_addr, BUS_DMA_NOWAIT); 960 if (error) { 961 device_printf(dev, "could not get address of RX ring\n"); 962 return(error); 963 } 964 965 /* Create DMA maps for RX buffers */ 966 967 for (i = 0; i < RE_RX_DESC_CNT; i++) { 968 error = bus_dmamap_create(sc->re_ldata.re_mtag, 0, 969 &sc->re_ldata.re_rx_dmamap[i]); 970 if (error) { 971 device_printf(dev, "can't create DMA map for RX\n"); 972 return(ENOMEM); 973 } 974 } 975 976 return(0); 977 } 978 979 /* 980 * Attach the interface. Allocate softc structures, do ifmedia 981 * setup and ethernet/BPF attach. 982 */ 983 static int 984 re_attach(device_t dev) 985 { 986 struct re_softc *sc = device_get_softc(dev); 987 struct ifnet *ifp; 988 struct re_hwrev *hw_rev; 989 uint8_t eaddr[ETHER_ADDR_LEN]; 990 int hwrev; 991 u_int16_t re_did = 0; 992 int error = 0, rid, i; 993 994 callout_init(&sc->re_timer); 995 996 #ifndef BURN_BRIDGES 997 /* 998 * Handle power management nonsense. 999 */ 1000 1001 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) { 1002 uint32_t membase, irq; 1003 1004 /* Save important PCI config data. */ 1005 membase = pci_read_config(dev, RE_PCI_LOMEM, 4); 1006 irq = pci_read_config(dev, PCIR_INTLINE, 4); 1007 1008 /* Reset the power state. */ 1009 device_printf(dev, "chip is is in D%d power mode " 1010 "-- setting to D0\n", pci_get_powerstate(dev)); 1011 1012 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 1013 1014 /* Restore PCI config data. */ 1015 pci_write_config(dev, RE_PCI_LOMEM, membase, 4); 1016 pci_write_config(dev, PCIR_INTLINE, irq, 4); 1017 } 1018 #endif 1019 /* 1020 * Map control/status registers. 1021 */ 1022 pci_enable_busmaster(dev); 1023 1024 rid = RE_PCI_LOIO; 1025 sc->re_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 1026 RF_ACTIVE); 1027 1028 if (sc->re_res == NULL) { 1029 device_printf(dev, "couldn't map ports/memory\n"); 1030 error = ENXIO; 1031 goto fail; 1032 } 1033 1034 sc->re_btag = rman_get_bustag(sc->re_res); 1035 sc->re_bhandle = rman_get_bushandle(sc->re_res); 1036 1037 /* Allocate interrupt */ 1038 rid = 0; 1039 sc->re_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 1040 RF_SHAREABLE | RF_ACTIVE); 1041 1042 if (sc->re_irq == NULL) { 1043 device_printf(dev, "couldn't map interrupt\n"); 1044 error = ENXIO; 1045 goto fail; 1046 } 1047 1048 /* Reset the adapter. */ 1049 re_reset(sc); 1050 1051 hwrev = CSR_READ_4(sc, RE_TXCFG) & RE_TXCFG_HWREV; 1052 for (hw_rev = re_hwrevs; hw_rev->re_desc != NULL; hw_rev++) { 1053 if (hw_rev->re_rev == hwrev) { 1054 sc->re_type = hw_rev->re_type; 1055 break; 1056 } 1057 } 1058 1059 if (sc->re_type == RE_8169) { 1060 /* Set RX length mask */ 1061 sc->re_rxlenmask = RE_RDESC_STAT_GFRAGLEN; 1062 1063 /* Force station address autoload from the EEPROM */ 1064 CSR_WRITE_1(sc, RE_EECMD, RE_EEMODE_AUTOLOAD); 1065 for (i = 0; i < RE_TIMEOUT; i++) { 1066 if ((CSR_READ_1(sc, RE_EECMD) & RE_EEMODE_AUTOLOAD) == 0) 1067 break; 1068 DELAY(100); 1069 } 1070 if (i == RE_TIMEOUT) 1071 device_printf(dev, "eeprom autoload timed out\n"); 1072 1073 for (i = 0; i < ETHER_ADDR_LEN; i++) 1074 eaddr[i] = CSR_READ_1(sc, RE_IDR0 + i); 1075 } else { 1076 uint16_t as[3]; 1077 1078 /* Set RX length mask */ 1079 sc->re_rxlenmask = RE_RDESC_STAT_FRAGLEN; 1080 1081 sc->re_eecmd_read = RE_EECMD_READ_6BIT; 1082 re_read_eeprom(sc, (caddr_t)&re_did, 0, 1, 0); 1083 if (re_did != 0x8129) 1084 sc->re_eecmd_read = RE_EECMD_READ_8BIT; 1085 1086 /* 1087 * Get station address from the EEPROM. 1088 */ 1089 re_read_eeprom(sc, (caddr_t)as, RE_EE_EADDR, 3, 0); 1090 for (i = 0; i < 3; i++) { 1091 eaddr[(i * 2) + 0] = as[i] & 0xff; 1092 eaddr[(i * 2) + 1] = as[i] >> 8; 1093 } 1094 } 1095 1096 /* 1097 * Allocate the parent bus DMA tag appropriate for PCI. 1098 */ 1099 #define RE_NSEG_NEW 32 1100 error = bus_dma_tag_create(NULL, /* parent */ 1101 1, 0, /* alignment, boundary */ 1102 BUS_SPACE_MAXADDR_32BIT,/* lowaddr */ 1103 BUS_SPACE_MAXADDR, /* highaddr */ 1104 NULL, NULL, /* filter, filterarg */ 1105 MAXBSIZE, RE_NSEG_NEW, /* maxsize, nsegments */ 1106 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */ 1107 BUS_DMA_ALLOCNOW, /* flags */ 1108 &sc->re_parent_tag); 1109 if (error) 1110 goto fail; 1111 1112 error = re_allocmem(dev, sc); 1113 1114 if (error) 1115 goto fail; 1116 1117 /* Do MII setup */ 1118 if (mii_phy_probe(dev, &sc->re_miibus, 1119 re_ifmedia_upd, re_ifmedia_sts)) { 1120 device_printf(dev, "MII without any phy!\n"); 1121 error = ENXIO; 1122 goto fail; 1123 } 1124 1125 ifp = &sc->arpcom.ac_if; 1126 ifp->if_softc = sc; 1127 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 1128 ifp->if_mtu = ETHERMTU; 1129 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 1130 ifp->if_ioctl = re_ioctl; 1131 ifp->if_capabilities = IFCAP_VLAN_MTU; 1132 ifp->if_start = re_start; 1133 ifp->if_capabilities |= IFCAP_HWCSUM|IFCAP_VLAN_HWTAGGING; 1134 #ifdef DEVICE_POLLING 1135 ifp->if_capabilities |= IFCAP_POLLING; 1136 #endif 1137 ifp->if_watchdog = re_watchdog; 1138 ifp->if_init = re_init; 1139 if (sc->re_type == RE_8169) 1140 ifp->if_baudrate = 1000000000; 1141 else 1142 ifp->if_baudrate = 100000000; 1143 ifq_set_maxlen(&ifp->if_snd, RE_IFQ_MAXLEN); 1144 ifq_set_ready(&ifp->if_snd); 1145 #ifdef RE_DISABLE_HWCSUM 1146 ifp->if_capenable = ifp->if_capabilities & ~IFCAP_HWCSUM; 1147 ifp->if_hwassist = 0; 1148 #else 1149 ifp->if_capenable = ifp->if_capabilities; 1150 ifp->if_hwassist = RE_CSUM_FEATURES; 1151 #endif 1152 1153 /* 1154 * Call MI attach routine. 1155 */ 1156 ether_ifattach(ifp, eaddr); 1157 1158 /* Perform hardware diagnostic. */ 1159 error = re_diag(sc); 1160 1161 if (error) { 1162 device_printf(dev, "hardware diagnostic failure\n"); 1163 ether_ifdetach(ifp); 1164 goto fail; 1165 } 1166 1167 /* Hook interrupt last to avoid having to lock softc */ 1168 error = bus_setup_intr(dev, sc->re_irq, INTR_TYPE_NET, re_intr, sc, 1169 &sc->re_intrhand); 1170 1171 if (error) { 1172 device_printf(dev, "couldn't set up irq\n"); 1173 ether_ifdetach(ifp); 1174 goto fail; 1175 } 1176 1177 fail: 1178 if (error) 1179 re_detach(dev); 1180 1181 return (error); 1182 } 1183 1184 /* 1185 * Shutdown hardware and free up resources. This can be called any 1186 * time after the mutex has been initialized. It is called in both 1187 * the error case in attach and the normal detach case so it needs 1188 * to be careful about only freeing resources that have actually been 1189 * allocated. 1190 */ 1191 static int 1192 re_detach(device_t dev) 1193 { 1194 struct re_softc *sc = device_get_softc(dev); 1195 struct ifnet *ifp = &sc->arpcom.ac_if; 1196 int i, s; 1197 1198 s = splimp(); 1199 1200 /* These should only be active if attach succeeded */ 1201 if (device_is_attached(dev)) { 1202 re_stop(sc); 1203 ether_ifdetach(ifp); 1204 } 1205 if (sc->re_miibus) 1206 device_delete_child(dev, sc->re_miibus); 1207 bus_generic_detach(dev); 1208 1209 if (sc->re_intrhand) 1210 bus_teardown_intr(dev, sc->re_irq, sc->re_intrhand); 1211 if (sc->re_irq) 1212 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->re_irq); 1213 if (sc->re_res) 1214 bus_release_resource(dev, SYS_RES_IOPORT, RE_PCI_LOIO, 1215 sc->re_res); 1216 1217 /* Unload and free the RX DMA ring memory and map */ 1218 1219 if (sc->re_ldata.re_rx_list_tag) { 1220 bus_dmamap_unload(sc->re_ldata.re_rx_list_tag, 1221 sc->re_ldata.re_rx_list_map); 1222 bus_dmamem_free(sc->re_ldata.re_rx_list_tag, 1223 sc->re_ldata.re_rx_list, 1224 sc->re_ldata.re_rx_list_map); 1225 bus_dma_tag_destroy(sc->re_ldata.re_rx_list_tag); 1226 } 1227 1228 /* Unload and free the TX DMA ring memory and map */ 1229 1230 if (sc->re_ldata.re_tx_list_tag) { 1231 bus_dmamap_unload(sc->re_ldata.re_tx_list_tag, 1232 sc->re_ldata.re_tx_list_map); 1233 bus_dmamem_free(sc->re_ldata.re_tx_list_tag, 1234 sc->re_ldata.re_tx_list, 1235 sc->re_ldata.re_tx_list_map); 1236 bus_dma_tag_destroy(sc->re_ldata.re_tx_list_tag); 1237 } 1238 1239 /* Destroy all the RX and TX buffer maps */ 1240 1241 if (sc->re_ldata.re_mtag) { 1242 for (i = 0; i < RE_TX_DESC_CNT; i++) 1243 bus_dmamap_destroy(sc->re_ldata.re_mtag, 1244 sc->re_ldata.re_tx_dmamap[i]); 1245 for (i = 0; i < RE_RX_DESC_CNT; i++) 1246 bus_dmamap_destroy(sc->re_ldata.re_mtag, 1247 sc->re_ldata.re_rx_dmamap[i]); 1248 bus_dma_tag_destroy(sc->re_ldata.re_mtag); 1249 } 1250 1251 /* Unload and free the stats buffer and map */ 1252 1253 if (sc->re_ldata.re_stag) { 1254 bus_dmamap_unload(sc->re_ldata.re_stag, 1255 sc->re_ldata.re_rx_list_map); 1256 bus_dmamem_free(sc->re_ldata.re_stag, 1257 sc->re_ldata.re_stats, 1258 sc->re_ldata.re_smap); 1259 bus_dma_tag_destroy(sc->re_ldata.re_stag); 1260 } 1261 1262 if (sc->re_parent_tag) 1263 bus_dma_tag_destroy(sc->re_parent_tag); 1264 1265 splx(s); 1266 1267 return(0); 1268 } 1269 1270 static int 1271 re_newbuf(struct re_softc *sc, int idx, struct mbuf *m) 1272 { 1273 struct re_dmaload_arg arg; 1274 struct mbuf *n = NULL; 1275 int error; 1276 1277 if (m == NULL) { 1278 n = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR); 1279 if (n == NULL) 1280 return(ENOBUFS); 1281 m = n; 1282 } else 1283 m->m_data = m->m_ext.ext_buf; 1284 1285 /* 1286 * Initialize mbuf length fields and fixup 1287 * alignment so that the frame payload is 1288 * longword aligned. 1289 */ 1290 m->m_len = m->m_pkthdr.len = MCLBYTES; 1291 m_adj(m, ETHER_ALIGN); 1292 1293 arg.sc = sc; 1294 arg.re_idx = idx; 1295 arg.re_maxsegs = 1; 1296 arg.re_flags = 0; 1297 arg.re_ring = sc->re_ldata.re_rx_list; 1298 1299 error = bus_dmamap_load_mbuf(sc->re_ldata.re_mtag, 1300 sc->re_ldata.re_rx_dmamap[idx], m, re_dma_map_desc, 1301 &arg, BUS_DMA_NOWAIT); 1302 if (error || arg.re_maxsegs != 1) { 1303 if (n != NULL) 1304 m_freem(n); 1305 return (ENOMEM); 1306 } 1307 1308 sc->re_ldata.re_rx_list[idx].re_cmdstat |= htole32(RE_RDESC_CMD_OWN); 1309 sc->re_ldata.re_rx_mbuf[idx] = m; 1310 1311 bus_dmamap_sync(sc->re_ldata.re_mtag, sc->re_ldata.re_rx_dmamap[idx], 1312 BUS_DMASYNC_PREREAD); 1313 1314 return(0); 1315 } 1316 1317 static int 1318 re_tx_list_init(struct re_softc *sc) 1319 { 1320 bzero(sc->re_ldata.re_tx_list, RE_TX_LIST_SZ); 1321 bzero(&sc->re_ldata.re_tx_mbuf, RE_TX_DESC_CNT * sizeof(struct mbuf *)); 1322 1323 bus_dmamap_sync(sc->re_ldata.re_tx_list_tag, 1324 sc->re_ldata.re_tx_list_map, BUS_DMASYNC_PREWRITE); 1325 sc->re_ldata.re_tx_prodidx = 0; 1326 sc->re_ldata.re_tx_considx = 0; 1327 sc->re_ldata.re_tx_free = RE_TX_DESC_CNT; 1328 1329 return(0); 1330 } 1331 1332 static int 1333 re_rx_list_init(struct re_softc *sc) 1334 { 1335 int i, error; 1336 1337 bzero(sc->re_ldata.re_rx_list, RE_RX_LIST_SZ); 1338 bzero(&sc->re_ldata.re_rx_mbuf, RE_RX_DESC_CNT * sizeof(struct mbuf *)); 1339 1340 for (i = 0; i < RE_RX_DESC_CNT; i++) { 1341 error = re_newbuf(sc, i, NULL); 1342 if (error) 1343 return(error); 1344 } 1345 1346 /* Flush the RX descriptors */ 1347 1348 bus_dmamap_sync(sc->re_ldata.re_rx_list_tag, 1349 sc->re_ldata.re_rx_list_map, 1350 BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD); 1351 1352 sc->re_ldata.re_rx_prodidx = 0; 1353 sc->re_head = sc->re_tail = NULL; 1354 1355 return(0); 1356 } 1357 1358 /* 1359 * RX handler for C+ and 8169. For the gigE chips, we support 1360 * the reception of jumbo frames that have been fragmented 1361 * across multiple 2K mbuf cluster buffers. 1362 */ 1363 static void 1364 re_rxeof(struct re_softc *sc) 1365 { 1366 struct ifnet *ifp = &sc->arpcom.ac_if; 1367 struct mbuf *m; 1368 struct re_desc *cur_rx; 1369 uint32_t rxstat, rxvlan; 1370 int i, total_len; 1371 1372 /* Invalidate the descriptor memory */ 1373 1374 bus_dmamap_sync(sc->re_ldata.re_rx_list_tag, 1375 sc->re_ldata.re_rx_list_map, BUS_DMASYNC_POSTREAD); 1376 1377 for (i = sc->re_ldata.re_rx_prodidx; 1378 RE_OWN(&sc->re_ldata.re_rx_list[i]) == 0 ; RE_DESC_INC(i)) { 1379 cur_rx = &sc->re_ldata.re_rx_list[i]; 1380 m = sc->re_ldata.re_rx_mbuf[i]; 1381 total_len = RE_RXBYTES(cur_rx); 1382 rxstat = le32toh(cur_rx->re_cmdstat); 1383 rxvlan = le32toh(cur_rx->re_vlanctl); 1384 1385 /* Invalidate the RX mbuf and unload its map */ 1386 1387 bus_dmamap_sync(sc->re_ldata.re_mtag, 1388 sc->re_ldata.re_rx_dmamap[i], 1389 BUS_DMASYNC_POSTWRITE); 1390 bus_dmamap_unload(sc->re_ldata.re_mtag, 1391 sc->re_ldata.re_rx_dmamap[i]); 1392 1393 if ((rxstat & RE_RDESC_STAT_EOF) == 0) { 1394 m->m_len = MCLBYTES - ETHER_ALIGN; 1395 if (sc->re_head == NULL) { 1396 sc->re_head = sc->re_tail = m; 1397 } else { 1398 m->m_flags &= ~M_PKTHDR; 1399 sc->re_tail->m_next = m; 1400 sc->re_tail = m; 1401 } 1402 re_newbuf(sc, i, NULL); 1403 continue; 1404 } 1405 1406 /* 1407 * NOTE: for the 8139C+, the frame length field 1408 * is always 12 bits in size, but for the gigE chips, 1409 * it is 13 bits (since the max RX frame length is 16K). 1410 * Unfortunately, all 32 bits in the status word 1411 * were already used, so to make room for the extra 1412 * length bit, RealTek took out the 'frame alignment 1413 * error' bit and shifted the other status bits 1414 * over one slot. The OWN, EOR, FS and LS bits are 1415 * still in the same places. We have already extracted 1416 * the frame length and checked the OWN bit, so rather 1417 * than using an alternate bit mapping, we shift the 1418 * status bits one space to the right so we can evaluate 1419 * them using the 8169 status as though it was in the 1420 * same format as that of the 8139C+. 1421 */ 1422 if (sc->re_type == RE_8169) 1423 rxstat >>= 1; 1424 1425 if (rxstat & RE_RDESC_STAT_RXERRSUM) { 1426 ifp->if_ierrors++; 1427 /* 1428 * If this is part of a multi-fragment packet, 1429 * discard all the pieces. 1430 */ 1431 if (sc->re_head != NULL) { 1432 m_freem(sc->re_head); 1433 sc->re_head = sc->re_tail = NULL; 1434 } 1435 re_newbuf(sc, i, m); 1436 continue; 1437 } 1438 1439 /* 1440 * If allocating a replacement mbuf fails, 1441 * reload the current one. 1442 */ 1443 1444 if (re_newbuf(sc, i, NULL)) { 1445 ifp->if_ierrors++; 1446 if (sc->re_head != NULL) { 1447 m_freem(sc->re_head); 1448 sc->re_head = sc->re_tail = NULL; 1449 } 1450 re_newbuf(sc, i, m); 1451 continue; 1452 } 1453 1454 if (sc->re_head != NULL) { 1455 m->m_len = total_len % (MCLBYTES - ETHER_ALIGN); 1456 /* 1457 * Special case: if there's 4 bytes or less 1458 * in this buffer, the mbuf can be discarded: 1459 * the last 4 bytes is the CRC, which we don't 1460 * care about anyway. 1461 */ 1462 if (m->m_len <= ETHER_CRC_LEN) { 1463 sc->re_tail->m_len -= 1464 (ETHER_CRC_LEN - m->m_len); 1465 m_freem(m); 1466 } else { 1467 m->m_len -= ETHER_CRC_LEN; 1468 m->m_flags &= ~M_PKTHDR; 1469 sc->re_tail->m_next = m; 1470 } 1471 m = sc->re_head; 1472 sc->re_head = sc->re_tail = NULL; 1473 m->m_pkthdr.len = total_len - ETHER_CRC_LEN; 1474 } else 1475 m->m_pkthdr.len = m->m_len = 1476 (total_len - ETHER_CRC_LEN); 1477 1478 ifp->if_ipackets++; 1479 m->m_pkthdr.rcvif = ifp; 1480 1481 /* Do RX checksumming if enabled */ 1482 1483 if (ifp->if_capenable & IFCAP_RXCSUM) { 1484 1485 /* Check IP header checksum */ 1486 if (rxstat & RE_RDESC_STAT_PROTOID) 1487 m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED; 1488 if ((rxstat & RE_RDESC_STAT_IPSUMBAD) == 0) 1489 m->m_pkthdr.csum_flags |= CSUM_IP_VALID; 1490 1491 /* Check TCP/UDP checksum */ 1492 if ((RE_TCPPKT(rxstat) && 1493 (rxstat & RE_RDESC_STAT_TCPSUMBAD) == 0) || 1494 (RE_UDPPKT(rxstat) && 1495 (rxstat & RE_RDESC_STAT_UDPSUMBAD)) == 0) { 1496 m->m_pkthdr.csum_flags |= 1497 CSUM_DATA_VALID|CSUM_PSEUDO_HDR; 1498 m->m_pkthdr.csum_data = 0xffff; 1499 } 1500 } 1501 1502 if (rxvlan & RE_RDESC_VLANCTL_TAG) 1503 VLAN_INPUT_TAG(m, 1504 be16toh((rxvlan & RE_RDESC_VLANCTL_DATA))); 1505 else 1506 (*ifp->if_input)(ifp, m); 1507 } 1508 1509 /* Flush the RX DMA ring */ 1510 1511 bus_dmamap_sync(sc->re_ldata.re_rx_list_tag, 1512 sc->re_ldata.re_rx_list_map, 1513 BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD); 1514 1515 sc->re_ldata.re_rx_prodidx = i; 1516 } 1517 1518 static void 1519 re_txeof(struct re_softc *sc) 1520 { 1521 struct ifnet *ifp = &sc->arpcom.ac_if; 1522 uint32_t txstat; 1523 int idx; 1524 1525 /* Invalidate the TX descriptor list */ 1526 1527 bus_dmamap_sync(sc->re_ldata.re_tx_list_tag, 1528 sc->re_ldata.re_tx_list_map, 1529 BUS_DMASYNC_POSTREAD); 1530 1531 for (idx = sc->re_ldata.re_tx_considx; 1532 idx != sc->re_ldata.re_tx_prodidx; RE_DESC_INC(idx)) { 1533 txstat = le32toh(sc->re_ldata.re_tx_list[idx].re_cmdstat); 1534 if (txstat & RE_TDESC_CMD_OWN) 1535 break; 1536 1537 /* 1538 * We only stash mbufs in the last descriptor 1539 * in a fragment chain, which also happens to 1540 * be the only place where the TX status bits 1541 * are valid. 1542 */ 1543 if (txstat & RE_TDESC_CMD_EOF) { 1544 m_freem(sc->re_ldata.re_tx_mbuf[idx]); 1545 sc->re_ldata.re_tx_mbuf[idx] = NULL; 1546 bus_dmamap_unload(sc->re_ldata.re_mtag, 1547 sc->re_ldata.re_tx_dmamap[idx]); 1548 if (txstat & (RE_TDESC_STAT_EXCESSCOL| 1549 RE_TDESC_STAT_COLCNT)) 1550 ifp->if_collisions++; 1551 if (txstat & RE_TDESC_STAT_TXERRSUM) 1552 ifp->if_oerrors++; 1553 else 1554 ifp->if_opackets++; 1555 } 1556 sc->re_ldata.re_tx_free++; 1557 } 1558 1559 /* No changes made to the TX ring, so no flush needed */ 1560 if (idx != sc->re_ldata.re_tx_considx) { 1561 sc->re_ldata.re_tx_considx = idx; 1562 ifp->if_flags &= ~IFF_OACTIVE; 1563 ifp->if_timer = 0; 1564 } 1565 1566 /* 1567 * If not all descriptors have been released reaped yet, 1568 * reload the timer so that we will eventually get another 1569 * interrupt that will cause us to re-enter this routine. 1570 * This is done in case the transmitter has gone idle. 1571 */ 1572 if (sc->re_ldata.re_tx_free != RE_TX_DESC_CNT) 1573 CSR_WRITE_4(sc, RE_TIMERCNT, 1); 1574 } 1575 1576 static void 1577 re_tick(void *xsc) 1578 { 1579 struct re_softc *sc = xsc; 1580 struct mii_data *mii; 1581 int s; 1582 1583 s = splimp(); 1584 1585 mii = device_get_softc(sc->re_miibus); 1586 mii_tick(mii); 1587 1588 callout_reset(&sc->re_timer, hz, re_tick, sc); 1589 splx(s); 1590 } 1591 1592 #ifdef DEVICE_POLLING 1593 static void 1594 re_poll(struct ifnet *ifp, enum poll_cmd cmd, int count) 1595 { 1596 struct re_softc *sc = ifp->if_softc; 1597 1598 if ((ifp->if_capenable & IFCAP_POLLING) == 0) { 1599 ether_poll_deregister(ifp); 1600 cmd = POLL_DEREGISTER; 1601 } 1602 if (cmd == POLL_DEREGISTER) { /* final call, enable interrupts */ 1603 CSR_WRITE_2(sc, RE_IMR, RE_INTRS_CPLUS); 1604 return; 1605 } 1606 1607 sc->rxcycles = count; 1608 re_rxeof(sc); 1609 re_txeof(sc); 1610 1611 if (!ifq_is_empty(&ifp->if_snd)) 1612 (*ifp->if_start)(ifp); 1613 1614 if (cmd == POLL_AND_CHECK_STATUS) { /* also check status register */ 1615 uint16_t status; 1616 1617 status = CSR_READ_2(sc, RE_ISR); 1618 if (status == 0xffff) 1619 return; 1620 if (status) 1621 CSR_WRITE_2(sc, RE_ISR, status); 1622 1623 /* 1624 * XXX check behaviour on receiver stalls. 1625 */ 1626 1627 if (status & RE_ISR_SYSTEM_ERR) { 1628 re_reset(sc); 1629 re_init(sc); 1630 } 1631 } 1632 } 1633 #endif /* DEVICE_POLLING */ 1634 1635 static void 1636 re_intr(void *arg) 1637 { 1638 struct re_softc *sc = arg; 1639 struct ifnet *ifp = &sc->arpcom.ac_if; 1640 uint16_t status; 1641 int s; 1642 1643 if (sc->suspended || (ifp->if_flags & IFF_UP) == 0) 1644 return; 1645 1646 #ifdef DEVICE_POLLING 1647 if (ifp->if_flags & IFF_POLLING) 1648 return; 1649 if ((ifp->if_capenable & IFCAP_POLLING) && 1650 ether_poll_register(re_poll, ifp)) { /* ok, disable interrupts */ 1651 CSR_WRITE_2(sc, RE_IMR, 0x0000); 1652 re_poll(ifp, 0, 1); 1653 return; 1654 } 1655 #endif /* DEVICE_POLLING */ 1656 1657 s = splimp(); 1658 1659 for (;;) { 1660 status = CSR_READ_2(sc, RE_ISR); 1661 /* If the card has gone away the read returns 0xffff. */ 1662 if (status == 0xffff) 1663 break; 1664 if (status) 1665 CSR_WRITE_2(sc, RE_ISR, status); 1666 1667 if ((status & RE_INTRS_CPLUS) == 0) 1668 break; 1669 1670 if (status & RE_ISR_RX_OK) 1671 re_rxeof(sc); 1672 1673 if (status & RE_ISR_RX_ERR) 1674 re_rxeof(sc); 1675 1676 if ((status & RE_ISR_TIMEOUT_EXPIRED) || 1677 (status & RE_ISR_TX_ERR) || 1678 (status & RE_ISR_TX_DESC_UNAVAIL)) 1679 re_txeof(sc); 1680 1681 if (status & RE_ISR_SYSTEM_ERR) { 1682 re_reset(sc); 1683 re_init(sc); 1684 } 1685 1686 if (status & RE_ISR_LINKCHG) 1687 re_tick(sc); 1688 } 1689 1690 if (!ifq_is_empty(&ifp->if_snd)) 1691 (*ifp->if_start)(ifp); 1692 1693 splx(s); 1694 } 1695 1696 static int 1697 re_encap(sc, m_head, idx) 1698 struct re_softc *sc; 1699 struct mbuf *m_head; 1700 int *idx; 1701 { 1702 struct ifnet *ifp = &sc->arpcom.ac_if; 1703 struct mbuf *m_new = NULL; 1704 struct re_dmaload_arg arg; 1705 bus_dmamap_t map; 1706 int error; 1707 1708 if (sc->re_ldata.re_tx_free <= 4) 1709 return(EFBIG); 1710 1711 /* 1712 * Set up checksum offload. Note: checksum offload bits must 1713 * appear in all descriptors of a multi-descriptor transmit 1714 * attempt. (This is according to testing done with an 8169 1715 * chip. I'm not sure if this is a requirement or a bug.) 1716 */ 1717 1718 arg.re_flags = 0; 1719 1720 if (m_head->m_pkthdr.csum_flags & CSUM_IP) 1721 arg.re_flags |= RE_TDESC_CMD_IPCSUM; 1722 if (m_head->m_pkthdr.csum_flags & CSUM_TCP) 1723 arg.re_flags |= RE_TDESC_CMD_TCPCSUM; 1724 if (m_head->m_pkthdr.csum_flags & CSUM_UDP) 1725 arg.re_flags |= RE_TDESC_CMD_UDPCSUM; 1726 1727 arg.sc = sc; 1728 arg.re_idx = *idx; 1729 arg.re_maxsegs = sc->re_ldata.re_tx_free; 1730 if (arg.re_maxsegs > 4) 1731 arg.re_maxsegs -= 4; 1732 arg.re_ring = sc->re_ldata.re_tx_list; 1733 1734 map = sc->re_ldata.re_tx_dmamap[*idx]; 1735 error = bus_dmamap_load_mbuf(sc->re_ldata.re_mtag, map, 1736 m_head, re_dma_map_desc, &arg, BUS_DMA_NOWAIT); 1737 1738 if (error && error != EFBIG) { 1739 if_printf(ifp, "can't map mbuf (error %d)\n", error); 1740 return(ENOBUFS); 1741 } 1742 1743 /* Too many segments to map, coalesce into a single mbuf */ 1744 1745 if (error || arg.re_maxsegs == 0) { 1746 m_new = m_defrag(m_head, MB_DONTWAIT); 1747 if (m_new == NULL) 1748 return(1); 1749 else 1750 m_head = m_new; 1751 1752 arg.sc = sc; 1753 arg.re_idx = *idx; 1754 arg.re_maxsegs = sc->re_ldata.re_tx_free; 1755 arg.re_ring = sc->re_ldata.re_tx_list; 1756 1757 error = bus_dmamap_load_mbuf(sc->re_ldata.re_mtag, map, 1758 m_head, re_dma_map_desc, &arg, BUS_DMA_NOWAIT); 1759 if (error) { 1760 if_printf(ifp, "can't map mbuf (error %d)\n", error); 1761 return(EFBIG); 1762 } 1763 } 1764 1765 /* 1766 * Insure that the map for this transmission 1767 * is placed at the array index of the last descriptor 1768 * in this chain. 1769 */ 1770 sc->re_ldata.re_tx_dmamap[*idx] = 1771 sc->re_ldata.re_tx_dmamap[arg.re_idx]; 1772 sc->re_ldata.re_tx_dmamap[arg.re_idx] = map; 1773 1774 sc->re_ldata.re_tx_mbuf[arg.re_idx] = m_head; 1775 sc->re_ldata.re_tx_free -= arg.re_maxsegs; 1776 1777 /* 1778 * Set up hardware VLAN tagging. Note: vlan tag info must 1779 * appear in the first descriptor of a multi-descriptor 1780 * transmission attempt. 1781 */ 1782 1783 if ((m_head->m_flags & (M_PROTO1|M_PKTHDR)) == (M_PROTO1|M_PKTHDR) && 1784 m_head->m_pkthdr.rcvif != NULL && 1785 m_head->m_pkthdr.rcvif->if_type == IFT_L2VLAN) { 1786 struct ifvlan *ifv; 1787 ifv = m_head->m_pkthdr.rcvif->if_softc; 1788 if (ifv != NULL) 1789 sc->re_ldata.re_tx_list[*idx].re_vlanctl = 1790 htole32(htobe16(ifv->ifv_tag) | RE_TDESC_VLANCTL_TAG); 1791 } 1792 1793 /* Transfer ownership of packet to the chip. */ 1794 1795 sc->re_ldata.re_tx_list[arg.re_idx].re_cmdstat |= 1796 htole32(RE_TDESC_CMD_OWN); 1797 if (*idx != arg.re_idx) 1798 sc->re_ldata.re_tx_list[*idx].re_cmdstat |= 1799 htole32(RE_TDESC_CMD_OWN); 1800 1801 RE_DESC_INC(arg.re_idx); 1802 *idx = arg.re_idx; 1803 1804 return(0); 1805 } 1806 1807 /* 1808 * Main transmit routine for C+ and gigE NICs. 1809 */ 1810 1811 static void 1812 re_start(struct ifnet *ifp) 1813 { 1814 struct re_softc *sc = ifp->if_softc; 1815 struct mbuf *m_head = NULL; 1816 int idx, s; 1817 1818 s = splimp(); 1819 1820 idx = sc->re_ldata.re_tx_prodidx; 1821 1822 while (sc->re_ldata.re_tx_mbuf[idx] == NULL) { 1823 m_head = ifq_poll(&ifp->if_snd); 1824 if (m_head == NULL) 1825 break; 1826 1827 if (re_encap(sc, m_head, &idx)) { 1828 ifp->if_flags |= IFF_OACTIVE; 1829 break; 1830 } 1831 ifq_dequeue(&ifp->if_snd); /* Same as above, we are under splimp. */ 1832 1833 /* 1834 * If there's a BPF listener, bounce a copy of this frame 1835 * to him. 1836 */ 1837 BPF_MTAP(ifp, m_head); 1838 } 1839 1840 /* Flush the TX descriptors */ 1841 bus_dmamap_sync(sc->re_ldata.re_tx_list_tag, 1842 sc->re_ldata.re_tx_list_map, 1843 BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD); 1844 1845 sc->re_ldata.re_tx_prodidx = idx; 1846 1847 /* 1848 * RealTek put the TX poll request register in a different 1849 * location on the 8169 gigE chip. I don't know why. 1850 */ 1851 if (sc->re_type == RE_8169) 1852 CSR_WRITE_2(sc, RE_GTXSTART, RE_TXSTART_START); 1853 else 1854 CSR_WRITE_2(sc, RE_TXSTART, RE_TXSTART_START); 1855 1856 /* 1857 * Use the countdown timer for interrupt moderation. 1858 * 'TX done' interrupts are disabled. Instead, we reset the 1859 * countdown timer, which will begin counting until it hits 1860 * the value in the TIMERINT register, and then trigger an 1861 * interrupt. Each time we write to the TIMERCNT register, 1862 * the timer count is reset to 0. 1863 */ 1864 CSR_WRITE_4(sc, RE_TIMERCNT, 1); 1865 1866 splx(s); 1867 1868 /* 1869 * Set a timeout in case the chip goes out to lunch. 1870 */ 1871 ifp->if_timer = 5; 1872 } 1873 1874 static void 1875 re_init(void *xsc) 1876 { 1877 struct re_softc *sc = xsc; 1878 struct ifnet *ifp = &sc->arpcom.ac_if; 1879 struct mii_data *mii; 1880 uint32_t rxcfg = 0; 1881 int s; 1882 1883 s = splimp(); 1884 mii = device_get_softc(sc->re_miibus); 1885 1886 /* 1887 * Cancel pending I/O and free all RX/TX buffers. 1888 */ 1889 re_stop(sc); 1890 1891 /* 1892 * Enable C+ RX and TX mode, as well as VLAN stripping and 1893 * RX checksum offload. We must configure the C+ register 1894 * before all others. 1895 */ 1896 CSR_WRITE_2(sc, RE_CPLUS_CMD, RE_CPLUSCMD_RXENB | RE_CPLUSCMD_TXENB | 1897 RE_CPLUSCMD_PCI_MRW | RE_CPLUSCMD_VLANSTRIP | 1898 (ifp->if_capenable & IFCAP_RXCSUM ? 1899 RE_CPLUSCMD_RXCSUM_ENB : 0)); 1900 1901 /* 1902 * Init our MAC address. Even though the chipset 1903 * documentation doesn't mention it, we need to enter "Config 1904 * register write enable" mode to modify the ID registers. 1905 */ 1906 CSR_WRITE_1(sc, RE_EECMD, RE_EEMODE_WRITECFG); 1907 CSR_WRITE_STREAM_4(sc, RE_IDR0, 1908 *(u_int32_t *)(&sc->arpcom.ac_enaddr[0])); 1909 CSR_WRITE_STREAM_4(sc, RE_IDR4, 1910 *(u_int32_t *)(&sc->arpcom.ac_enaddr[4])); 1911 CSR_WRITE_1(sc, RE_EECMD, RE_EEMODE_OFF); 1912 1913 /* 1914 * For C+ mode, initialize the RX descriptors and mbufs. 1915 */ 1916 re_rx_list_init(sc); 1917 re_tx_list_init(sc); 1918 1919 /* 1920 * Enable transmit and receive. 1921 */ 1922 CSR_WRITE_1(sc, RE_COMMAND, RE_CMD_TX_ENB|RE_CMD_RX_ENB); 1923 1924 /* 1925 * Set the initial TX and RX configuration. 1926 */ 1927 if (sc->re_testmode) { 1928 if (sc->re_type == RE_8169) 1929 CSR_WRITE_4(sc, RE_TXCFG, 1930 RE_TXCFG_CONFIG | RE_LOOPTEST_ON); 1931 else 1932 CSR_WRITE_4(sc, RE_TXCFG, 1933 RE_TXCFG_CONFIG | RE_LOOPTEST_ON_CPLUS); 1934 } else 1935 CSR_WRITE_4(sc, RE_TXCFG, RE_TXCFG_CONFIG); 1936 CSR_WRITE_4(sc, RE_RXCFG, RE_RXCFG_CONFIG); 1937 1938 /* Set the individual bit to receive frames for this host only. */ 1939 rxcfg = CSR_READ_4(sc, RE_RXCFG); 1940 rxcfg |= RE_RXCFG_RX_INDIV; 1941 1942 /* If we want promiscuous mode, set the allframes bit. */ 1943 if (ifp->if_flags & IFF_PROMISC) { 1944 rxcfg |= RE_RXCFG_RX_ALLPHYS; 1945 CSR_WRITE_4(sc, RE_RXCFG, rxcfg); 1946 } else { 1947 rxcfg &= ~RE_RXCFG_RX_ALLPHYS; 1948 CSR_WRITE_4(sc, RE_RXCFG, rxcfg); 1949 } 1950 1951 /* 1952 * Set capture broadcast bit to capture broadcast frames. 1953 */ 1954 if (ifp->if_flags & IFF_BROADCAST) { 1955 rxcfg |= RE_RXCFG_RX_BROAD; 1956 CSR_WRITE_4(sc, RE_RXCFG, rxcfg); 1957 } else { 1958 rxcfg &= ~RE_RXCFG_RX_BROAD; 1959 CSR_WRITE_4(sc, RE_RXCFG, rxcfg); 1960 } 1961 1962 /* 1963 * Program the multicast filter, if necessary. 1964 */ 1965 re_setmulti(sc); 1966 1967 #ifdef DEVICE_POLLING 1968 /* 1969 * Disable interrupts if we are polling. 1970 */ 1971 if (ifp->if_flags & IFF_POLLING) 1972 CSR_WRITE_2(sc, RE_IMR, 0); 1973 else /* otherwise ... */ 1974 #endif /* DEVICE_POLLING */ 1975 /* 1976 * Enable interrupts. 1977 */ 1978 if (sc->re_testmode) 1979 CSR_WRITE_2(sc, RE_IMR, 0); 1980 else 1981 CSR_WRITE_2(sc, RE_IMR, RE_INTRS_CPLUS); 1982 1983 /* Set initial TX threshold */ 1984 sc->re_txthresh = RE_TX_THRESH_INIT; 1985 1986 /* Start RX/TX process. */ 1987 CSR_WRITE_4(sc, RE_MISSEDPKT, 0); 1988 #ifdef notdef 1989 /* Enable receiver and transmitter. */ 1990 CSR_WRITE_1(sc, RE_COMMAND, RE_CMD_TX_ENB|RE_CMD_RX_ENB); 1991 #endif 1992 /* 1993 * Load the addresses of the RX and TX lists into the chip. 1994 */ 1995 1996 CSR_WRITE_4(sc, RE_RXLIST_ADDR_HI, 1997 RE_ADDR_HI(sc->re_ldata.re_rx_list_addr)); 1998 CSR_WRITE_4(sc, RE_RXLIST_ADDR_LO, 1999 RE_ADDR_LO(sc->re_ldata.re_rx_list_addr)); 2000 2001 CSR_WRITE_4(sc, RE_TXLIST_ADDR_HI, 2002 RE_ADDR_HI(sc->re_ldata.re_tx_list_addr)); 2003 CSR_WRITE_4(sc, RE_TXLIST_ADDR_LO, 2004 RE_ADDR_LO(sc->re_ldata.re_tx_list_addr)); 2005 2006 CSR_WRITE_1(sc, RE_EARLY_TX_THRESH, 16); 2007 2008 /* 2009 * Initialize the timer interrupt register so that 2010 * a timer interrupt will be generated once the timer 2011 * reaches a certain number of ticks. The timer is 2012 * reloaded on each transmit. This gives us TX interrupt 2013 * moderation, which dramatically improves TX frame rate. 2014 */ 2015 2016 if (sc->re_type == RE_8169) 2017 CSR_WRITE_4(sc, RE_TIMERINT_8169, 0x800); 2018 else 2019 CSR_WRITE_4(sc, RE_TIMERINT, 0x400); 2020 2021 /* 2022 * For 8169 gigE NICs, set the max allowed RX packet 2023 * size so we can receive jumbo frames. 2024 */ 2025 if (sc->re_type == RE_8169) 2026 CSR_WRITE_2(sc, RE_MAXRXPKTLEN, 16383); 2027 2028 if (sc->re_testmode) { 2029 splx(s); 2030 return; 2031 } 2032 2033 mii_mediachg(mii); 2034 2035 CSR_WRITE_1(sc, RE_CFG1, RE_CFG1_DRVLOAD|RE_CFG1_FULLDUPLEX); 2036 2037 ifp->if_flags |= IFF_RUNNING; 2038 ifp->if_flags &= ~IFF_OACTIVE; 2039 2040 callout_reset(&sc->re_timer, hz, re_tick, sc); 2041 splx(s); 2042 } 2043 2044 /* 2045 * Set media options. 2046 */ 2047 static int 2048 re_ifmedia_upd(struct ifnet *ifp) 2049 { 2050 struct re_softc *sc = ifp->if_softc; 2051 struct mii_data *mii; 2052 2053 mii = device_get_softc(sc->re_miibus); 2054 mii_mediachg(mii); 2055 2056 return(0); 2057 } 2058 2059 /* 2060 * Report current media status. 2061 */ 2062 static void 2063 re_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 2064 { 2065 struct re_softc *sc = ifp->if_softc; 2066 struct mii_data *mii; 2067 2068 mii = device_get_softc(sc->re_miibus); 2069 2070 mii_pollstat(mii); 2071 ifmr->ifm_active = mii->mii_media_active; 2072 ifmr->ifm_status = mii->mii_media_status; 2073 } 2074 2075 static int 2076 re_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr) 2077 { 2078 struct re_softc *sc = ifp->if_softc; 2079 struct ifreq *ifr = (struct ifreq *) data; 2080 struct mii_data *mii; 2081 int error = 0, s; 2082 2083 s = splimp(); 2084 2085 switch(command) { 2086 case SIOCSIFMTU: 2087 if (ifr->ifr_mtu > RE_JUMBO_MTU) 2088 error = EINVAL; 2089 ifp->if_mtu = ifr->ifr_mtu; 2090 break; 2091 case SIOCSIFFLAGS: 2092 if (ifp->if_flags & IFF_UP) 2093 re_init(sc); 2094 else if (ifp->if_flags & IFF_RUNNING) 2095 re_stop(sc); 2096 error = 0; 2097 break; 2098 case SIOCADDMULTI: 2099 case SIOCDELMULTI: 2100 re_setmulti(sc); 2101 error = 0; 2102 break; 2103 case SIOCGIFMEDIA: 2104 case SIOCSIFMEDIA: 2105 mii = device_get_softc(sc->re_miibus); 2106 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 2107 break; 2108 case SIOCSIFCAP: 2109 ifp->if_capenable &= ~(IFCAP_HWCSUM | IFCAP_POLLING); 2110 ifp->if_capenable |= 2111 ifr->ifr_reqcap & (IFCAP_HWCSUM | IFCAP_POLLING); 2112 if (ifp->if_capenable & IFCAP_TXCSUM) 2113 ifp->if_hwassist = RE_CSUM_FEATURES; 2114 else 2115 ifp->if_hwassist = 0; 2116 if (ifp->if_flags & IFF_RUNNING) 2117 re_init(sc); 2118 break; 2119 default: 2120 error = ether_ioctl(ifp, command, data); 2121 break; 2122 } 2123 2124 splx(s); 2125 2126 return(error); 2127 } 2128 2129 static void 2130 re_watchdog(struct ifnet *ifp) 2131 { 2132 struct re_softc *sc = ifp->if_softc; 2133 int s; 2134 2135 s = splimp(); 2136 if_printf(ifp, "watchdog timeout\n"); 2137 ifp->if_oerrors++; 2138 2139 re_txeof(sc); 2140 re_rxeof(sc); 2141 2142 re_init(sc); 2143 2144 splx(s); 2145 } 2146 2147 /* 2148 * Stop the adapter and free any mbufs allocated to the 2149 * RX and TX lists. 2150 */ 2151 static void 2152 re_stop(struct re_softc *sc) 2153 { 2154 struct ifnet *ifp = &sc->arpcom.ac_if; 2155 int i, s; 2156 2157 s = splimp(); 2158 ifp->if_timer = 0; 2159 callout_stop(&sc->re_timer); 2160 2161 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2162 #ifdef DEVICE_POLLING 2163 ether_poll_deregister(ifp); 2164 #endif /* DEVICE_POLLING */ 2165 2166 CSR_WRITE_1(sc, RE_COMMAND, 0x00); 2167 CSR_WRITE_2(sc, RE_IMR, 0x0000); 2168 2169 if (sc->re_head != NULL) { 2170 m_freem(sc->re_head); 2171 sc->re_head = sc->re_tail = NULL; 2172 } 2173 2174 /* Free the TX list buffers. */ 2175 for (i = 0; i < RE_TX_DESC_CNT; i++) { 2176 if (sc->re_ldata.re_tx_mbuf[i] != NULL) { 2177 bus_dmamap_unload(sc->re_ldata.re_mtag, 2178 sc->re_ldata.re_tx_dmamap[i]); 2179 m_freem(sc->re_ldata.re_tx_mbuf[i]); 2180 sc->re_ldata.re_tx_mbuf[i] = NULL; 2181 } 2182 } 2183 2184 /* Free the RX list buffers. */ 2185 for (i = 0; i < RE_RX_DESC_CNT; i++) { 2186 if (sc->re_ldata.re_rx_mbuf[i] != NULL) { 2187 bus_dmamap_unload(sc->re_ldata.re_mtag, 2188 sc->re_ldata.re_rx_dmamap[i]); 2189 m_freem(sc->re_ldata.re_rx_mbuf[i]); 2190 sc->re_ldata.re_rx_mbuf[i] = NULL; 2191 } 2192 } 2193 2194 splx(s); 2195 } 2196 2197 /* 2198 * Device suspend routine. Stop the interface and save some PCI 2199 * settings in case the BIOS doesn't restore them properly on 2200 * resume. 2201 */ 2202 static int 2203 re_suspend(device_t dev) 2204 { 2205 #ifndef BURN_BRIDGES 2206 int i; 2207 #endif 2208 struct re_softc *sc = device_get_softc(dev); 2209 2210 re_stop(sc); 2211 2212 #ifndef BURN_BRIDGES 2213 for (i = 0; i < 5; i++) 2214 sc->saved_maps[i] = pci_read_config(dev, PCIR_MAPS + i * 4, 4); 2215 sc->saved_biosaddr = pci_read_config(dev, PCIR_BIOS, 4); 2216 sc->saved_intline = pci_read_config(dev, PCIR_INTLINE, 1); 2217 sc->saved_cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1); 2218 sc->saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1); 2219 #endif 2220 2221 sc->suspended = 1; 2222 2223 return (0); 2224 } 2225 2226 /* 2227 * Device resume routine. Restore some PCI settings in case the BIOS 2228 * doesn't, re-enable busmastering, and restart the interface if 2229 * appropriate. 2230 */ 2231 static int 2232 re_resume(device_t dev) 2233 { 2234 struct re_softc *sc = device_get_softc(dev); 2235 struct ifnet *ifp = &sc->arpcom.ac_if; 2236 #ifndef BURN_BRIDGES 2237 int i; 2238 #endif 2239 2240 #ifndef BURN_BRIDGES 2241 /* better way to do this? */ 2242 for (i = 0; i < 5; i++) 2243 pci_write_config(dev, PCIR_MAPS + i * 4, sc->saved_maps[i], 4); 2244 pci_write_config(dev, PCIR_BIOS, sc->saved_biosaddr, 4); 2245 pci_write_config(dev, PCIR_INTLINE, sc->saved_intline, 1); 2246 pci_write_config(dev, PCIR_CACHELNSZ, sc->saved_cachelnsz, 1); 2247 pci_write_config(dev, PCIR_LATTIMER, sc->saved_lattimer, 1); 2248 2249 /* reenable busmastering */ 2250 pci_enable_busmaster(dev); 2251 pci_enable_io(dev, SYS_RES_IOPORT); 2252 #endif 2253 2254 /* reinitialize interface if necessary */ 2255 if (ifp->if_flags & IFF_UP) 2256 re_init(sc); 2257 2258 sc->suspended = 0; 2259 2260 return (0); 2261 } 2262 2263 /* 2264 * Stop all chip I/O so that the kernel's probe routines don't 2265 * get confused by errant DMAs when rebooting. 2266 */ 2267 static void 2268 re_shutdown(device_t dev) 2269 { 2270 struct re_softc *sc = device_get_softc(dev); 2271 2272 re_stop(sc); 2273 } 2274