1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 2005 Poul-Henning Kamp <phk@FreeBSD.org> 5 * Copyright (c) 1997, 1998, 1999 6 * Bill Paul <wpaul@ctr.columbia.edu>. 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 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 /* 40 * SiS 900/SiS 7016 fast ethernet PCI NIC driver. Datasheets are 41 * available from http://www.sis.com.tw. 42 * 43 * This driver also supports the NatSemi DP83815. Datasheets are 44 * available from http://www.national.com. 45 * 46 * Written by Bill Paul <wpaul@ee.columbia.edu> 47 * Electrical Engineering Department 48 * Columbia University, New York City 49 */ 50 /* 51 * The SiS 900 is a fairly simple chip. It uses bus master DMA with 52 * simple TX and RX descriptors of 3 longwords in size. The receiver 53 * has a single perfect filter entry for the station address and a 54 * 128-bit multicast hash table. The SiS 900 has a built-in MII-based 55 * transceiver while the 7016 requires an external transceiver chip. 56 * Both chips offer the standard bit-bang MII interface as well as 57 * an enchanced PHY interface which simplifies accessing MII registers. 58 * 59 * The only downside to this chipset is that RX descriptors must be 60 * longword aligned. 61 */ 62 63 #ifdef HAVE_KERNEL_OPTION_HEADERS 64 #include "opt_device_polling.h" 65 #endif 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/bus.h> 70 #include <sys/endian.h> 71 #include <sys/kernel.h> 72 #include <sys/lock.h> 73 #include <sys/malloc.h> 74 #include <sys/mbuf.h> 75 #include <sys/module.h> 76 #include <sys/socket.h> 77 #include <sys/sockio.h> 78 #include <sys/sysctl.h> 79 80 #include <net/if.h> 81 #include <net/if_var.h> 82 #include <net/if_arp.h> 83 #include <net/ethernet.h> 84 #include <net/if_dl.h> 85 #include <net/if_media.h> 86 #include <net/if_types.h> 87 #include <net/if_vlan_var.h> 88 89 #include <net/bpf.h> 90 91 #include <machine/bus.h> 92 #include <machine/resource.h> 93 #include <sys/rman.h> 94 95 #include <dev/mii/mii.h> 96 #include <dev/mii/mii_bitbang.h> 97 #include <dev/mii/miivar.h> 98 99 #include <dev/pci/pcireg.h> 100 #include <dev/pci/pcivar.h> 101 102 #define SIS_USEIOSPACE 103 104 #include <dev/sis/if_sisreg.h> 105 106 MODULE_DEPEND(sis, pci, 1, 1, 1); 107 MODULE_DEPEND(sis, ether, 1, 1, 1); 108 MODULE_DEPEND(sis, miibus, 1, 1, 1); 109 110 /* "device miibus" required. See GENERIC if you get errors here. */ 111 #include "miibus_if.h" 112 113 #define SIS_LOCK(_sc) mtx_lock(&(_sc)->sis_mtx) 114 #define SIS_UNLOCK(_sc) mtx_unlock(&(_sc)->sis_mtx) 115 #define SIS_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->sis_mtx, MA_OWNED) 116 117 /* 118 * register space access macros 119 */ 120 #define CSR_WRITE_4(sc, reg, val) bus_write_4(sc->sis_res[0], reg, val) 121 122 #define CSR_READ_4(sc, reg) bus_read_4(sc->sis_res[0], reg) 123 124 #define CSR_READ_2(sc, reg) bus_read_2(sc->sis_res[0], reg) 125 126 #define CSR_BARRIER(sc, reg, length, flags) \ 127 bus_barrier(sc->sis_res[0], reg, length, flags) 128 129 /* 130 * Various supported device vendors/types and their names. 131 */ 132 static const struct sis_type sis_devs[] = { 133 { SIS_VENDORID, SIS_DEVICEID_900, "SiS 900 10/100BaseTX" }, 134 { SIS_VENDORID, SIS_DEVICEID_7016, "SiS 7016 10/100BaseTX" }, 135 { NS_VENDORID, NS_DEVICEID_DP83815, "NatSemi DP8381[56] 10/100BaseTX" }, 136 { 0, 0, NULL } 137 }; 138 139 static int sis_detach(device_t); 140 static __inline void sis_discard_rxbuf(struct sis_rxdesc *); 141 static int sis_dma_alloc(struct sis_softc *); 142 static void sis_dma_free(struct sis_softc *); 143 static int sis_dma_ring_alloc(struct sis_softc *, bus_size_t, bus_size_t, 144 bus_dma_tag_t *, uint8_t **, bus_dmamap_t *, bus_addr_t *, const char *); 145 static void sis_dmamap_cb(void *, bus_dma_segment_t *, int, int); 146 #ifndef __NO_STRICT_ALIGNMENT 147 static __inline void sis_fixup_rx(struct mbuf *); 148 #endif 149 static void sis_ifmedia_sts(struct ifnet *, struct ifmediareq *); 150 static int sis_ifmedia_upd(struct ifnet *); 151 static void sis_init(void *); 152 static void sis_initl(struct sis_softc *); 153 static void sis_intr(void *); 154 static int sis_ioctl(struct ifnet *, u_long, caddr_t); 155 static uint32_t sis_mii_bitbang_read(device_t); 156 static void sis_mii_bitbang_write(device_t, uint32_t); 157 static int sis_newbuf(struct sis_softc *, struct sis_rxdesc *); 158 static int sis_resume(device_t); 159 static int sis_rxeof(struct sis_softc *); 160 static void sis_rxfilter(struct sis_softc *); 161 static void sis_rxfilter_ns(struct sis_softc *); 162 static void sis_rxfilter_sis(struct sis_softc *); 163 static void sis_start(struct ifnet *); 164 static void sis_startl(struct ifnet *); 165 static void sis_stop(struct sis_softc *); 166 static int sis_suspend(device_t); 167 static void sis_add_sysctls(struct sis_softc *); 168 static void sis_watchdog(struct sis_softc *); 169 static void sis_wol(struct sis_softc *); 170 171 /* 172 * MII bit-bang glue 173 */ 174 static const struct mii_bitbang_ops sis_mii_bitbang_ops = { 175 sis_mii_bitbang_read, 176 sis_mii_bitbang_write, 177 { 178 SIS_MII_DATA, /* MII_BIT_MDO */ 179 SIS_MII_DATA, /* MII_BIT_MDI */ 180 SIS_MII_CLK, /* MII_BIT_MDC */ 181 SIS_MII_DIR, /* MII_BIT_DIR_HOST_PHY */ 182 0, /* MII_BIT_DIR_PHY_HOST */ 183 } 184 }; 185 186 static struct resource_spec sis_res_spec[] = { 187 #ifdef SIS_USEIOSPACE 188 { SYS_RES_IOPORT, SIS_PCI_LOIO, RF_ACTIVE}, 189 #else 190 { SYS_RES_MEMORY, SIS_PCI_LOMEM, RF_ACTIVE}, 191 #endif 192 { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE}, 193 { -1, 0 } 194 }; 195 196 #define SIS_SETBIT(sc, reg, x) \ 197 CSR_WRITE_4(sc, reg, \ 198 CSR_READ_4(sc, reg) | (x)) 199 200 #define SIS_CLRBIT(sc, reg, x) \ 201 CSR_WRITE_4(sc, reg, \ 202 CSR_READ_4(sc, reg) & ~(x)) 203 204 #define SIO_SET(x) \ 205 CSR_WRITE_4(sc, SIS_EECTL, CSR_READ_4(sc, SIS_EECTL) | x) 206 207 #define SIO_CLR(x) \ 208 CSR_WRITE_4(sc, SIS_EECTL, CSR_READ_4(sc, SIS_EECTL) & ~x) 209 210 /* 211 * Routine to reverse the bits in a word. Stolen almost 212 * verbatim from /usr/games/fortune. 213 */ 214 static uint16_t 215 sis_reverse(uint16_t n) 216 { 217 n = ((n >> 1) & 0x5555) | ((n << 1) & 0xaaaa); 218 n = ((n >> 2) & 0x3333) | ((n << 2) & 0xcccc); 219 n = ((n >> 4) & 0x0f0f) | ((n << 4) & 0xf0f0); 220 n = ((n >> 8) & 0x00ff) | ((n << 8) & 0xff00); 221 222 return (n); 223 } 224 225 static void 226 sis_delay(struct sis_softc *sc) 227 { 228 int idx; 229 230 for (idx = (300 / 33) + 1; idx > 0; idx--) 231 CSR_READ_4(sc, SIS_CSR); 232 } 233 234 static void 235 sis_eeprom_idle(struct sis_softc *sc) 236 { 237 int i; 238 239 SIO_SET(SIS_EECTL_CSEL); 240 sis_delay(sc); 241 SIO_SET(SIS_EECTL_CLK); 242 sis_delay(sc); 243 244 for (i = 0; i < 25; i++) { 245 SIO_CLR(SIS_EECTL_CLK); 246 sis_delay(sc); 247 SIO_SET(SIS_EECTL_CLK); 248 sis_delay(sc); 249 } 250 251 SIO_CLR(SIS_EECTL_CLK); 252 sis_delay(sc); 253 SIO_CLR(SIS_EECTL_CSEL); 254 sis_delay(sc); 255 CSR_WRITE_4(sc, SIS_EECTL, 0x00000000); 256 } 257 258 /* 259 * Send a read command and address to the EEPROM, check for ACK. 260 */ 261 static void 262 sis_eeprom_putbyte(struct sis_softc *sc, int addr) 263 { 264 int d, i; 265 266 d = addr | SIS_EECMD_READ; 267 268 /* 269 * Feed in each bit and stobe the clock. 270 */ 271 for (i = 0x400; i; i >>= 1) { 272 if (d & i) { 273 SIO_SET(SIS_EECTL_DIN); 274 } else { 275 SIO_CLR(SIS_EECTL_DIN); 276 } 277 sis_delay(sc); 278 SIO_SET(SIS_EECTL_CLK); 279 sis_delay(sc); 280 SIO_CLR(SIS_EECTL_CLK); 281 sis_delay(sc); 282 } 283 } 284 285 /* 286 * Read a word of data stored in the EEPROM at address 'addr.' 287 */ 288 static void 289 sis_eeprom_getword(struct sis_softc *sc, int addr, uint16_t *dest) 290 { 291 int i; 292 uint16_t word = 0; 293 294 /* Force EEPROM to idle state. */ 295 sis_eeprom_idle(sc); 296 297 /* Enter EEPROM access mode. */ 298 sis_delay(sc); 299 SIO_CLR(SIS_EECTL_CLK); 300 sis_delay(sc); 301 SIO_SET(SIS_EECTL_CSEL); 302 sis_delay(sc); 303 304 /* 305 * Send address of word we want to read. 306 */ 307 sis_eeprom_putbyte(sc, addr); 308 309 /* 310 * Start reading bits from EEPROM. 311 */ 312 for (i = 0x8000; i; i >>= 1) { 313 SIO_SET(SIS_EECTL_CLK); 314 sis_delay(sc); 315 if (CSR_READ_4(sc, SIS_EECTL) & SIS_EECTL_DOUT) 316 word |= i; 317 sis_delay(sc); 318 SIO_CLR(SIS_EECTL_CLK); 319 sis_delay(sc); 320 } 321 322 /* Turn off EEPROM access mode. */ 323 sis_eeprom_idle(sc); 324 325 *dest = word; 326 } 327 328 /* 329 * Read a sequence of words from the EEPROM. 330 */ 331 static void 332 sis_read_eeprom(struct sis_softc *sc, caddr_t dest, int off, int cnt, int swap) 333 { 334 int i; 335 uint16_t word = 0, *ptr; 336 337 for (i = 0; i < cnt; i++) { 338 sis_eeprom_getword(sc, off + i, &word); 339 ptr = (uint16_t *)(dest + (i * 2)); 340 if (swap) 341 *ptr = ntohs(word); 342 else 343 *ptr = word; 344 } 345 } 346 347 #if defined(__i386__) || defined(__amd64__) 348 static device_t 349 sis_find_bridge(device_t dev) 350 { 351 devclass_t pci_devclass; 352 device_t *pci_devices; 353 int pci_count = 0; 354 device_t *pci_children; 355 int pci_childcount = 0; 356 device_t *busp, *childp; 357 device_t child = NULL; 358 int i, j; 359 360 if ((pci_devclass = devclass_find("pci")) == NULL) 361 return (NULL); 362 363 devclass_get_devices(pci_devclass, &pci_devices, &pci_count); 364 365 for (i = 0, busp = pci_devices; i < pci_count; i++, busp++) { 366 if (device_get_children(*busp, &pci_children, &pci_childcount)) 367 continue; 368 for (j = 0, childp = pci_children; 369 j < pci_childcount; j++, childp++) { 370 if (pci_get_vendor(*childp) == SIS_VENDORID && 371 pci_get_device(*childp) == 0x0008) { 372 child = *childp; 373 free(pci_children, M_TEMP); 374 goto done; 375 } 376 } 377 free(pci_children, M_TEMP); 378 } 379 380 done: 381 free(pci_devices, M_TEMP); 382 return (child); 383 } 384 385 static void 386 sis_read_cmos(struct sis_softc *sc, device_t dev, caddr_t dest, int off, int cnt) 387 { 388 device_t bridge; 389 uint8_t reg; 390 int i; 391 bus_space_tag_t btag; 392 393 bridge = sis_find_bridge(dev); 394 if (bridge == NULL) 395 return; 396 reg = pci_read_config(bridge, 0x48, 1); 397 pci_write_config(bridge, 0x48, reg|0x40, 1); 398 399 /* XXX */ 400 #if defined(__amd64__) || defined(__i386__) 401 btag = X86_BUS_SPACE_IO; 402 #endif 403 404 for (i = 0; i < cnt; i++) { 405 bus_space_write_1(btag, 0x0, 0x70, i + off); 406 *(dest + i) = bus_space_read_1(btag, 0x0, 0x71); 407 } 408 409 pci_write_config(bridge, 0x48, reg & ~0x40, 1); 410 } 411 412 static void 413 sis_read_mac(struct sis_softc *sc, device_t dev, caddr_t dest) 414 { 415 uint32_t filtsave, csrsave; 416 417 filtsave = CSR_READ_4(sc, SIS_RXFILT_CTL); 418 csrsave = CSR_READ_4(sc, SIS_CSR); 419 420 CSR_WRITE_4(sc, SIS_CSR, SIS_CSR_RELOAD | filtsave); 421 CSR_WRITE_4(sc, SIS_CSR, 0); 422 423 CSR_WRITE_4(sc, SIS_RXFILT_CTL, filtsave & ~SIS_RXFILTCTL_ENABLE); 424 425 CSR_WRITE_4(sc, SIS_RXFILT_CTL, SIS_FILTADDR_PAR0); 426 ((uint16_t *)dest)[0] = CSR_READ_2(sc, SIS_RXFILT_DATA); 427 CSR_WRITE_4(sc, SIS_RXFILT_CTL,SIS_FILTADDR_PAR1); 428 ((uint16_t *)dest)[1] = CSR_READ_2(sc, SIS_RXFILT_DATA); 429 CSR_WRITE_4(sc, SIS_RXFILT_CTL, SIS_FILTADDR_PAR2); 430 ((uint16_t *)dest)[2] = CSR_READ_2(sc, SIS_RXFILT_DATA); 431 432 CSR_WRITE_4(sc, SIS_RXFILT_CTL, filtsave); 433 CSR_WRITE_4(sc, SIS_CSR, csrsave); 434 } 435 #endif 436 437 /* 438 * Read the MII serial port for the MII bit-bang module. 439 */ 440 static uint32_t 441 sis_mii_bitbang_read(device_t dev) 442 { 443 struct sis_softc *sc; 444 uint32_t val; 445 446 sc = device_get_softc(dev); 447 448 val = CSR_READ_4(sc, SIS_EECTL); 449 CSR_BARRIER(sc, SIS_EECTL, 4, 450 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 451 return (val); 452 } 453 454 /* 455 * Write the MII serial port for the MII bit-bang module. 456 */ 457 static void 458 sis_mii_bitbang_write(device_t dev, uint32_t val) 459 { 460 struct sis_softc *sc; 461 462 sc = device_get_softc(dev); 463 464 CSR_WRITE_4(sc, SIS_EECTL, val); 465 CSR_BARRIER(sc, SIS_EECTL, 4, 466 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 467 } 468 469 static int 470 sis_miibus_readreg(device_t dev, int phy, int reg) 471 { 472 struct sis_softc *sc; 473 474 sc = device_get_softc(dev); 475 476 if (sc->sis_type == SIS_TYPE_83815) { 477 if (phy != 0) 478 return (0); 479 /* 480 * The NatSemi chip can take a while after 481 * a reset to come ready, during which the BMSR 482 * returns a value of 0. This is *never* supposed 483 * to happen: some of the BMSR bits are meant to 484 * be hardwired in the on position, and this can 485 * confuse the miibus code a bit during the probe 486 * and attach phase. So we make an effort to check 487 * for this condition and wait for it to clear. 488 */ 489 if (!CSR_READ_4(sc, NS_BMSR)) 490 DELAY(1000); 491 return CSR_READ_4(sc, NS_BMCR + (reg * 4)); 492 } 493 494 /* 495 * Chipsets < SIS_635 seem not to be able to read/write 496 * through mdio. Use the enhanced PHY access register 497 * again for them. 498 */ 499 if (sc->sis_type == SIS_TYPE_900 && 500 sc->sis_rev < SIS_REV_635) { 501 int i, val = 0; 502 503 if (phy != 0) 504 return (0); 505 506 CSR_WRITE_4(sc, SIS_PHYCTL, 507 (phy << 11) | (reg << 6) | SIS_PHYOP_READ); 508 SIS_SETBIT(sc, SIS_PHYCTL, SIS_PHYCTL_ACCESS); 509 510 for (i = 0; i < SIS_TIMEOUT; i++) { 511 if (!(CSR_READ_4(sc, SIS_PHYCTL) & SIS_PHYCTL_ACCESS)) 512 break; 513 } 514 515 if (i == SIS_TIMEOUT) { 516 device_printf(sc->sis_dev, 517 "PHY failed to come ready\n"); 518 return (0); 519 } 520 521 val = (CSR_READ_4(sc, SIS_PHYCTL) >> 16) & 0xFFFF; 522 523 if (val == 0xFFFF) 524 return (0); 525 526 return (val); 527 } else 528 return (mii_bitbang_readreg(dev, &sis_mii_bitbang_ops, phy, 529 reg)); 530 } 531 532 static int 533 sis_miibus_writereg(device_t dev, int phy, int reg, int data) 534 { 535 struct sis_softc *sc; 536 537 sc = device_get_softc(dev); 538 539 if (sc->sis_type == SIS_TYPE_83815) { 540 if (phy != 0) 541 return (0); 542 CSR_WRITE_4(sc, NS_BMCR + (reg * 4), data); 543 return (0); 544 } 545 546 /* 547 * Chipsets < SIS_635 seem not to be able to read/write 548 * through mdio. Use the enhanced PHY access register 549 * again for them. 550 */ 551 if (sc->sis_type == SIS_TYPE_900 && 552 sc->sis_rev < SIS_REV_635) { 553 int i; 554 555 if (phy != 0) 556 return (0); 557 558 CSR_WRITE_4(sc, SIS_PHYCTL, (data << 16) | (phy << 11) | 559 (reg << 6) | SIS_PHYOP_WRITE); 560 SIS_SETBIT(sc, SIS_PHYCTL, SIS_PHYCTL_ACCESS); 561 562 for (i = 0; i < SIS_TIMEOUT; i++) { 563 if (!(CSR_READ_4(sc, SIS_PHYCTL) & SIS_PHYCTL_ACCESS)) 564 break; 565 } 566 567 if (i == SIS_TIMEOUT) 568 device_printf(sc->sis_dev, 569 "PHY failed to come ready\n"); 570 } else 571 mii_bitbang_writereg(dev, &sis_mii_bitbang_ops, phy, reg, 572 data); 573 return (0); 574 } 575 576 static void 577 sis_miibus_statchg(device_t dev) 578 { 579 struct sis_softc *sc; 580 struct mii_data *mii; 581 struct ifnet *ifp; 582 uint32_t reg; 583 584 sc = device_get_softc(dev); 585 SIS_LOCK_ASSERT(sc); 586 587 mii = device_get_softc(sc->sis_miibus); 588 ifp = sc->sis_ifp; 589 if (mii == NULL || ifp == NULL || 590 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 591 return; 592 593 sc->sis_flags &= ~SIS_FLAG_LINK; 594 if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) == 595 (IFM_ACTIVE | IFM_AVALID)) { 596 switch (IFM_SUBTYPE(mii->mii_media_active)) { 597 case IFM_10_T: 598 CSR_WRITE_4(sc, SIS_TX_CFG, SIS_TXCFG_10); 599 sc->sis_flags |= SIS_FLAG_LINK; 600 break; 601 case IFM_100_TX: 602 CSR_WRITE_4(sc, SIS_TX_CFG, SIS_TXCFG_100); 603 sc->sis_flags |= SIS_FLAG_LINK; 604 break; 605 default: 606 break; 607 } 608 } 609 610 if ((sc->sis_flags & SIS_FLAG_LINK) == 0) { 611 /* 612 * Stopping MACs seem to reset SIS_TX_LISTPTR and 613 * SIS_RX_LISTPTR which in turn requires resetting 614 * TX/RX buffers. So just don't do anything for 615 * lost link. 616 */ 617 return; 618 } 619 620 /* Set full/half duplex mode. */ 621 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) { 622 SIS_SETBIT(sc, SIS_TX_CFG, 623 (SIS_TXCFG_IGN_HBEAT | SIS_TXCFG_IGN_CARR)); 624 SIS_SETBIT(sc, SIS_RX_CFG, SIS_RXCFG_RX_TXPKTS); 625 } else { 626 SIS_CLRBIT(sc, SIS_TX_CFG, 627 (SIS_TXCFG_IGN_HBEAT | SIS_TXCFG_IGN_CARR)); 628 SIS_CLRBIT(sc, SIS_RX_CFG, SIS_RXCFG_RX_TXPKTS); 629 } 630 631 if (sc->sis_type == SIS_TYPE_83815 && sc->sis_srr >= NS_SRR_16A) { 632 /* 633 * MPII03.D: Half Duplex Excessive Collisions. 634 * Also page 49 in 83816 manual 635 */ 636 SIS_SETBIT(sc, SIS_TX_CFG, SIS_TXCFG_MPII03D); 637 } 638 639 if (sc->sis_type == SIS_TYPE_83815 && sc->sis_srr < NS_SRR_16A && 640 IFM_SUBTYPE(mii->mii_media_active) == IFM_100_TX) { 641 /* 642 * Short Cable Receive Errors (MP21.E) 643 */ 644 CSR_WRITE_4(sc, NS_PHY_PAGE, 0x0001); 645 reg = CSR_READ_4(sc, NS_PHY_DSPCFG) & 0xfff; 646 CSR_WRITE_4(sc, NS_PHY_DSPCFG, reg | 0x1000); 647 DELAY(100); 648 reg = CSR_READ_4(sc, NS_PHY_TDATA) & 0xff; 649 if ((reg & 0x0080) == 0 || (reg > 0xd8 && reg <= 0xff)) { 650 device_printf(sc->sis_dev, 651 "Applying short cable fix (reg=%x)\n", reg); 652 CSR_WRITE_4(sc, NS_PHY_TDATA, 0x00e8); 653 SIS_SETBIT(sc, NS_PHY_DSPCFG, 0x20); 654 } 655 CSR_WRITE_4(sc, NS_PHY_PAGE, 0); 656 } 657 /* Enable TX/RX MACs. */ 658 SIS_CLRBIT(sc, SIS_CSR, SIS_CSR_TX_DISABLE | SIS_CSR_RX_DISABLE); 659 SIS_SETBIT(sc, SIS_CSR, SIS_CSR_TX_ENABLE | SIS_CSR_RX_ENABLE); 660 } 661 662 static uint32_t 663 sis_mchash(struct sis_softc *sc, const uint8_t *addr) 664 { 665 uint32_t crc; 666 667 /* Compute CRC for the address value. */ 668 crc = ether_crc32_be(addr, ETHER_ADDR_LEN); 669 670 /* 671 * return the filter bit position 672 * 673 * The NatSemi chip has a 512-bit filter, which is 674 * different than the SiS, so we special-case it. 675 */ 676 if (sc->sis_type == SIS_TYPE_83815) 677 return (crc >> 23); 678 else if (sc->sis_rev >= SIS_REV_635 || 679 sc->sis_rev == SIS_REV_900B) 680 return (crc >> 24); 681 else 682 return (crc >> 25); 683 } 684 685 static void 686 sis_rxfilter(struct sis_softc *sc) 687 { 688 689 SIS_LOCK_ASSERT(sc); 690 691 if (sc->sis_type == SIS_TYPE_83815) 692 sis_rxfilter_ns(sc); 693 else 694 sis_rxfilter_sis(sc); 695 } 696 697 static u_int 698 sis_write_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt) 699 { 700 struct sis_softc *sc = arg; 701 uint32_t h; 702 int bit, index; 703 704 h = sis_mchash(sc, LLADDR(sdl)); 705 index = h >> 3; 706 bit = h & 0x1F; 707 CSR_WRITE_4(sc, SIS_RXFILT_CTL, NS_FILTADDR_FMEM_LO + index); 708 if (bit > 0xF) 709 bit -= 0x10; 710 SIS_SETBIT(sc, SIS_RXFILT_DATA, (1 << bit)); 711 712 return (1); 713 } 714 715 static void 716 sis_rxfilter_ns(struct sis_softc *sc) 717 { 718 struct ifnet *ifp; 719 uint32_t i, filter; 720 721 ifp = sc->sis_ifp; 722 filter = CSR_READ_4(sc, SIS_RXFILT_CTL); 723 if (filter & SIS_RXFILTCTL_ENABLE) { 724 /* 725 * Filter should be disabled to program other bits. 726 */ 727 CSR_WRITE_4(sc, SIS_RXFILT_CTL, filter & ~SIS_RXFILTCTL_ENABLE); 728 CSR_READ_4(sc, SIS_RXFILT_CTL); 729 } 730 filter &= ~(NS_RXFILTCTL_ARP | NS_RXFILTCTL_PERFECT | 731 NS_RXFILTCTL_MCHASH | SIS_RXFILTCTL_ALLPHYS | SIS_RXFILTCTL_BROAD | 732 SIS_RXFILTCTL_ALLMULTI); 733 734 if (ifp->if_flags & IFF_BROADCAST) 735 filter |= SIS_RXFILTCTL_BROAD; 736 /* 737 * For the NatSemi chip, we have to explicitly enable the 738 * reception of ARP frames, as well as turn on the 'perfect 739 * match' filter where we store the station address, otherwise 740 * we won't receive unicasts meant for this host. 741 */ 742 filter |= NS_RXFILTCTL_ARP | NS_RXFILTCTL_PERFECT; 743 744 if (ifp->if_flags & (IFF_ALLMULTI | IFF_PROMISC)) { 745 filter |= SIS_RXFILTCTL_ALLMULTI; 746 if (ifp->if_flags & IFF_PROMISC) 747 filter |= SIS_RXFILTCTL_ALLPHYS; 748 } else { 749 /* 750 * We have to explicitly enable the multicast hash table 751 * on the NatSemi chip if we want to use it, which we do. 752 */ 753 filter |= NS_RXFILTCTL_MCHASH; 754 755 /* first, zot all the existing hash bits */ 756 for (i = 0; i < 32; i++) { 757 CSR_WRITE_4(sc, SIS_RXFILT_CTL, NS_FILTADDR_FMEM_LO + 758 (i * 2)); 759 CSR_WRITE_4(sc, SIS_RXFILT_DATA, 0); 760 } 761 762 if_foreach_llmaddr(ifp, sis_write_maddr, sc); 763 } 764 765 /* Turn the receive filter on */ 766 CSR_WRITE_4(sc, SIS_RXFILT_CTL, filter | SIS_RXFILTCTL_ENABLE); 767 CSR_READ_4(sc, SIS_RXFILT_CTL); 768 } 769 770 struct sis_hash_maddr_ctx { 771 struct sis_softc *sc; 772 uint16_t hashes[16]; 773 }; 774 775 static u_int 776 sis_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt) 777 { 778 struct sis_hash_maddr_ctx *ctx = arg; 779 uint32_t h; 780 781 h = sis_mchash(ctx->sc, LLADDR(sdl)); 782 ctx->hashes[h >> 4] |= 1 << (h & 0xf); 783 784 return (1); 785 } 786 787 static void 788 sis_rxfilter_sis(struct sis_softc *sc) 789 { 790 struct ifnet *ifp; 791 struct sis_hash_maddr_ctx ctx; 792 uint32_t filter, i, n; 793 794 ifp = sc->sis_ifp; 795 796 /* hash table size */ 797 if (sc->sis_rev >= SIS_REV_635 || sc->sis_rev == SIS_REV_900B) 798 n = 16; 799 else 800 n = 8; 801 802 filter = CSR_READ_4(sc, SIS_RXFILT_CTL); 803 if (filter & SIS_RXFILTCTL_ENABLE) { 804 CSR_WRITE_4(sc, SIS_RXFILT_CTL, filter & ~SIS_RXFILTCTL_ENABLE); 805 CSR_READ_4(sc, SIS_RXFILT_CTL); 806 } 807 filter &= ~(SIS_RXFILTCTL_ALLPHYS | SIS_RXFILTCTL_BROAD | 808 SIS_RXFILTCTL_ALLMULTI); 809 if (ifp->if_flags & IFF_BROADCAST) 810 filter |= SIS_RXFILTCTL_BROAD; 811 812 if (ifp->if_flags & (IFF_ALLMULTI | IFF_PROMISC)) { 813 filter |= SIS_RXFILTCTL_ALLMULTI; 814 if (ifp->if_flags & IFF_PROMISC) 815 filter |= SIS_RXFILTCTL_ALLPHYS; 816 for (i = 0; i < n; i++) 817 ctx.hashes[i] = ~0; 818 } else { 819 for (i = 0; i < n; i++) 820 ctx.hashes[i] = 0; 821 ctx.sc = sc; 822 if (if_foreach_llmaddr(ifp, sis_hash_maddr, &ctx) > n) { 823 filter |= SIS_RXFILTCTL_ALLMULTI; 824 for (i = 0; i < n; i++) 825 ctx.hashes[i] = ~0; 826 } 827 } 828 829 for (i = 0; i < n; i++) { 830 CSR_WRITE_4(sc, SIS_RXFILT_CTL, (4 + i) << 16); 831 CSR_WRITE_4(sc, SIS_RXFILT_DATA, ctx.hashes[i]); 832 } 833 834 /* Turn the receive filter on */ 835 CSR_WRITE_4(sc, SIS_RXFILT_CTL, filter | SIS_RXFILTCTL_ENABLE); 836 CSR_READ_4(sc, SIS_RXFILT_CTL); 837 } 838 839 static void 840 sis_reset(struct sis_softc *sc) 841 { 842 int i; 843 844 SIS_SETBIT(sc, SIS_CSR, SIS_CSR_RESET); 845 846 for (i = 0; i < SIS_TIMEOUT; i++) { 847 if (!(CSR_READ_4(sc, SIS_CSR) & SIS_CSR_RESET)) 848 break; 849 } 850 851 if (i == SIS_TIMEOUT) 852 device_printf(sc->sis_dev, "reset never completed\n"); 853 854 /* Wait a little while for the chip to get its brains in order. */ 855 DELAY(1000); 856 857 /* 858 * If this is a NetSemi chip, make sure to clear 859 * PME mode. 860 */ 861 if (sc->sis_type == SIS_TYPE_83815) { 862 CSR_WRITE_4(sc, NS_CLKRUN, NS_CLKRUN_PMESTS); 863 CSR_WRITE_4(sc, NS_CLKRUN, 0); 864 } else { 865 /* Disable WOL functions. */ 866 CSR_WRITE_4(sc, SIS_PWRMAN_CTL, 0); 867 } 868 } 869 870 /* 871 * Probe for an SiS chip. Check the PCI vendor and device 872 * IDs against our list and return a device name if we find a match. 873 */ 874 static int 875 sis_probe(device_t dev) 876 { 877 const struct sis_type *t; 878 879 t = sis_devs; 880 881 while (t->sis_name != NULL) { 882 if ((pci_get_vendor(dev) == t->sis_vid) && 883 (pci_get_device(dev) == t->sis_did)) { 884 device_set_desc(dev, t->sis_name); 885 return (BUS_PROBE_DEFAULT); 886 } 887 t++; 888 } 889 890 return (ENXIO); 891 } 892 893 /* 894 * Attach the interface. Allocate softc structures, do ifmedia 895 * setup and ethernet/BPF attach. 896 */ 897 static int 898 sis_attach(device_t dev) 899 { 900 u_char eaddr[ETHER_ADDR_LEN]; 901 struct sis_softc *sc; 902 struct ifnet *ifp; 903 int error = 0, pmc, waittime = 0; 904 905 waittime = 0; 906 sc = device_get_softc(dev); 907 908 sc->sis_dev = dev; 909 910 mtx_init(&sc->sis_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 911 MTX_DEF); 912 callout_init_mtx(&sc->sis_stat_ch, &sc->sis_mtx, 0); 913 914 if (pci_get_device(dev) == SIS_DEVICEID_900) 915 sc->sis_type = SIS_TYPE_900; 916 if (pci_get_device(dev) == SIS_DEVICEID_7016) 917 sc->sis_type = SIS_TYPE_7016; 918 if (pci_get_vendor(dev) == NS_VENDORID) 919 sc->sis_type = SIS_TYPE_83815; 920 921 sc->sis_rev = pci_read_config(dev, PCIR_REVID, 1); 922 /* 923 * Map control/status registers. 924 */ 925 pci_enable_busmaster(dev); 926 927 error = bus_alloc_resources(dev, sis_res_spec, sc->sis_res); 928 if (error) { 929 device_printf(dev, "couldn't allocate resources\n"); 930 goto fail; 931 } 932 933 /* Reset the adapter. */ 934 sis_reset(sc); 935 936 if (sc->sis_type == SIS_TYPE_900 && 937 (sc->sis_rev == SIS_REV_635 || 938 sc->sis_rev == SIS_REV_900B)) { 939 SIO_SET(SIS_CFG_RND_CNT); 940 SIO_SET(SIS_CFG_PERR_DETECT); 941 } 942 943 /* 944 * Get station address from the EEPROM. 945 */ 946 switch (pci_get_vendor(dev)) { 947 case NS_VENDORID: 948 sc->sis_srr = CSR_READ_4(sc, NS_SRR); 949 950 /* We can't update the device description, so spew */ 951 if (sc->sis_srr == NS_SRR_15C) 952 device_printf(dev, "Silicon Revision: DP83815C\n"); 953 else if (sc->sis_srr == NS_SRR_15D) 954 device_printf(dev, "Silicon Revision: DP83815D\n"); 955 else if (sc->sis_srr == NS_SRR_16A) 956 device_printf(dev, "Silicon Revision: DP83816A\n"); 957 else 958 device_printf(dev, "Silicon Revision %x\n", sc->sis_srr); 959 960 /* 961 * Reading the MAC address out of the EEPROM on 962 * the NatSemi chip takes a bit more work than 963 * you'd expect. The address spans 4 16-bit words, 964 * with the first word containing only a single bit. 965 * You have to shift everything over one bit to 966 * get it aligned properly. Also, the bits are 967 * stored backwards (the LSB is really the MSB, 968 * and so on) so you have to reverse them in order 969 * to get the MAC address into the form we want. 970 * Why? Who the hell knows. 971 */ 972 { 973 uint16_t tmp[4]; 974 975 sis_read_eeprom(sc, (caddr_t)&tmp, 976 NS_EE_NODEADDR, 4, 0); 977 978 /* Shift everything over one bit. */ 979 tmp[3] = tmp[3] >> 1; 980 tmp[3] |= tmp[2] << 15; 981 tmp[2] = tmp[2] >> 1; 982 tmp[2] |= tmp[1] << 15; 983 tmp[1] = tmp[1] >> 1; 984 tmp[1] |= tmp[0] << 15; 985 986 /* Now reverse all the bits. */ 987 tmp[3] = sis_reverse(tmp[3]); 988 tmp[2] = sis_reverse(tmp[2]); 989 tmp[1] = sis_reverse(tmp[1]); 990 991 eaddr[0] = (tmp[1] >> 0) & 0xFF; 992 eaddr[1] = (tmp[1] >> 8) & 0xFF; 993 eaddr[2] = (tmp[2] >> 0) & 0xFF; 994 eaddr[3] = (tmp[2] >> 8) & 0xFF; 995 eaddr[4] = (tmp[3] >> 0) & 0xFF; 996 eaddr[5] = (tmp[3] >> 8) & 0xFF; 997 } 998 break; 999 case SIS_VENDORID: 1000 default: 1001 #if defined(__i386__) || defined(__amd64__) 1002 /* 1003 * If this is a SiS 630E chipset with an embedded 1004 * SiS 900 controller, we have to read the MAC address 1005 * from the APC CMOS RAM. Our method for doing this 1006 * is very ugly since we have to reach out and grab 1007 * ahold of hardware for which we cannot properly 1008 * allocate resources. This code is only compiled on 1009 * the i386 architecture since the SiS 630E chipset 1010 * is for x86 motherboards only. Note that there are 1011 * a lot of magic numbers in this hack. These are 1012 * taken from SiS's Linux driver. I'd like to replace 1013 * them with proper symbolic definitions, but that 1014 * requires some datasheets that I don't have access 1015 * to at the moment. 1016 */ 1017 if (sc->sis_rev == SIS_REV_630S || 1018 sc->sis_rev == SIS_REV_630E || 1019 sc->sis_rev == SIS_REV_630EA1) 1020 sis_read_cmos(sc, dev, (caddr_t)&eaddr, 0x9, 6); 1021 1022 else if (sc->sis_rev == SIS_REV_635 || 1023 sc->sis_rev == SIS_REV_630ET) 1024 sis_read_mac(sc, dev, (caddr_t)&eaddr); 1025 else if (sc->sis_rev == SIS_REV_96x) { 1026 /* Allow to read EEPROM from LAN. It is shared 1027 * between a 1394 controller and the NIC and each 1028 * time we access it, we need to set SIS_EECMD_REQ. 1029 */ 1030 SIO_SET(SIS_EECMD_REQ); 1031 for (waittime = 0; waittime < SIS_TIMEOUT; 1032 waittime++) { 1033 /* Force EEPROM to idle state. */ 1034 sis_eeprom_idle(sc); 1035 if (CSR_READ_4(sc, SIS_EECTL) & SIS_EECMD_GNT) { 1036 sis_read_eeprom(sc, (caddr_t)&eaddr, 1037 SIS_EE_NODEADDR, 3, 0); 1038 break; 1039 } 1040 DELAY(1); 1041 } 1042 /* 1043 * Set SIS_EECTL_CLK to high, so a other master 1044 * can operate on the i2c bus. 1045 */ 1046 SIO_SET(SIS_EECTL_CLK); 1047 /* Refuse EEPROM access by LAN */ 1048 SIO_SET(SIS_EECMD_DONE); 1049 } else 1050 #endif 1051 sis_read_eeprom(sc, (caddr_t)&eaddr, 1052 SIS_EE_NODEADDR, 3, 0); 1053 break; 1054 } 1055 1056 sis_add_sysctls(sc); 1057 1058 /* Allocate DMA'able memory. */ 1059 if ((error = sis_dma_alloc(sc)) != 0) 1060 goto fail; 1061 1062 ifp = sc->sis_ifp = if_alloc(IFT_ETHER); 1063 if (ifp == NULL) { 1064 device_printf(dev, "can not if_alloc()\n"); 1065 error = ENOSPC; 1066 goto fail; 1067 } 1068 ifp->if_softc = sc; 1069 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 1070 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 1071 ifp->if_ioctl = sis_ioctl; 1072 ifp->if_start = sis_start; 1073 ifp->if_init = sis_init; 1074 IFQ_SET_MAXLEN(&ifp->if_snd, SIS_TX_LIST_CNT - 1); 1075 ifp->if_snd.ifq_drv_maxlen = SIS_TX_LIST_CNT - 1; 1076 IFQ_SET_READY(&ifp->if_snd); 1077 1078 if (pci_find_cap(sc->sis_dev, PCIY_PMG, &pmc) == 0) { 1079 if (sc->sis_type == SIS_TYPE_83815) 1080 ifp->if_capabilities |= IFCAP_WOL; 1081 else 1082 ifp->if_capabilities |= IFCAP_WOL_MAGIC; 1083 ifp->if_capenable = ifp->if_capabilities; 1084 } 1085 1086 /* 1087 * Do MII setup. 1088 */ 1089 error = mii_attach(dev, &sc->sis_miibus, ifp, sis_ifmedia_upd, 1090 sis_ifmedia_sts, BMSR_DEFCAPMASK, MII_PHY_ANY, MII_OFFSET_ANY, 0); 1091 if (error != 0) { 1092 device_printf(dev, "attaching PHYs failed\n"); 1093 goto fail; 1094 } 1095 1096 /* 1097 * Call MI attach routine. 1098 */ 1099 ether_ifattach(ifp, eaddr); 1100 1101 /* 1102 * Tell the upper layer(s) we support long frames. 1103 */ 1104 ifp->if_hdrlen = sizeof(struct ether_vlan_header); 1105 ifp->if_capabilities |= IFCAP_VLAN_MTU; 1106 ifp->if_capenable = ifp->if_capabilities; 1107 #ifdef DEVICE_POLLING 1108 ifp->if_capabilities |= IFCAP_POLLING; 1109 #endif 1110 1111 /* Hook interrupt last to avoid having to lock softc */ 1112 error = bus_setup_intr(dev, sc->sis_res[1], INTR_TYPE_NET | INTR_MPSAFE, 1113 NULL, sis_intr, sc, &sc->sis_intrhand); 1114 1115 if (error) { 1116 device_printf(dev, "couldn't set up irq\n"); 1117 ether_ifdetach(ifp); 1118 goto fail; 1119 } 1120 1121 fail: 1122 if (error) 1123 sis_detach(dev); 1124 1125 return (error); 1126 } 1127 1128 /* 1129 * Shutdown hardware and free up resources. This can be called any 1130 * time after the mutex has been initialized. It is called in both 1131 * the error case in attach and the normal detach case so it needs 1132 * to be careful about only freeing resources that have actually been 1133 * allocated. 1134 */ 1135 static int 1136 sis_detach(device_t dev) 1137 { 1138 struct sis_softc *sc; 1139 struct ifnet *ifp; 1140 1141 sc = device_get_softc(dev); 1142 KASSERT(mtx_initialized(&sc->sis_mtx), ("sis mutex not initialized")); 1143 ifp = sc->sis_ifp; 1144 1145 #ifdef DEVICE_POLLING 1146 if (ifp->if_capenable & IFCAP_POLLING) 1147 ether_poll_deregister(ifp); 1148 #endif 1149 1150 /* These should only be active if attach succeeded. */ 1151 if (device_is_attached(dev)) { 1152 SIS_LOCK(sc); 1153 sis_stop(sc); 1154 SIS_UNLOCK(sc); 1155 callout_drain(&sc->sis_stat_ch); 1156 ether_ifdetach(ifp); 1157 } 1158 if (sc->sis_miibus) 1159 device_delete_child(dev, sc->sis_miibus); 1160 bus_generic_detach(dev); 1161 1162 if (sc->sis_intrhand) 1163 bus_teardown_intr(dev, sc->sis_res[1], sc->sis_intrhand); 1164 bus_release_resources(dev, sis_res_spec, sc->sis_res); 1165 1166 if (ifp) 1167 if_free(ifp); 1168 1169 sis_dma_free(sc); 1170 1171 mtx_destroy(&sc->sis_mtx); 1172 1173 return (0); 1174 } 1175 1176 struct sis_dmamap_arg { 1177 bus_addr_t sis_busaddr; 1178 }; 1179 1180 static void 1181 sis_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 1182 { 1183 struct sis_dmamap_arg *ctx; 1184 1185 if (error != 0) 1186 return; 1187 1188 KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs)); 1189 1190 ctx = (struct sis_dmamap_arg *)arg; 1191 ctx->sis_busaddr = segs[0].ds_addr; 1192 } 1193 1194 static int 1195 sis_dma_ring_alloc(struct sis_softc *sc, bus_size_t alignment, 1196 bus_size_t maxsize, bus_dma_tag_t *tag, uint8_t **ring, bus_dmamap_t *map, 1197 bus_addr_t *paddr, const char *msg) 1198 { 1199 struct sis_dmamap_arg ctx; 1200 int error; 1201 1202 error = bus_dma_tag_create(sc->sis_parent_tag, alignment, 0, 1203 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, maxsize, 1, 1204 maxsize, 0, NULL, NULL, tag); 1205 if (error != 0) { 1206 device_printf(sc->sis_dev, 1207 "could not create %s dma tag\n", msg); 1208 return (ENOMEM); 1209 } 1210 /* Allocate DMA'able memory for ring. */ 1211 error = bus_dmamem_alloc(*tag, (void **)ring, 1212 BUS_DMA_NOWAIT | BUS_DMA_ZERO | BUS_DMA_COHERENT, map); 1213 if (error != 0) { 1214 device_printf(sc->sis_dev, 1215 "could not allocate DMA'able memory for %s\n", msg); 1216 return (ENOMEM); 1217 } 1218 /* Load the address of the ring. */ 1219 ctx.sis_busaddr = 0; 1220 error = bus_dmamap_load(*tag, *map, *ring, maxsize, sis_dmamap_cb, 1221 &ctx, BUS_DMA_NOWAIT); 1222 if (error != 0) { 1223 device_printf(sc->sis_dev, 1224 "could not load DMA'able memory for %s\n", msg); 1225 return (ENOMEM); 1226 } 1227 *paddr = ctx.sis_busaddr; 1228 return (0); 1229 } 1230 1231 static int 1232 sis_dma_alloc(struct sis_softc *sc) 1233 { 1234 struct sis_rxdesc *rxd; 1235 struct sis_txdesc *txd; 1236 int error, i; 1237 1238 /* Allocate the parent bus DMA tag appropriate for PCI. */ 1239 error = bus_dma_tag_create(bus_get_dma_tag(sc->sis_dev), 1240 1, 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, 1241 NULL, BUS_SPACE_MAXSIZE_32BIT, 0, BUS_SPACE_MAXSIZE_32BIT, 1242 0, NULL, NULL, &sc->sis_parent_tag); 1243 if (error != 0) { 1244 device_printf(sc->sis_dev, 1245 "could not allocate parent dma tag\n"); 1246 return (ENOMEM); 1247 } 1248 1249 /* Create RX ring. */ 1250 error = sis_dma_ring_alloc(sc, SIS_DESC_ALIGN, SIS_RX_LIST_SZ, 1251 &sc->sis_rx_list_tag, (uint8_t **)&sc->sis_rx_list, 1252 &sc->sis_rx_list_map, &sc->sis_rx_paddr, "RX ring"); 1253 if (error) 1254 return (error); 1255 1256 /* Create TX ring. */ 1257 error = sis_dma_ring_alloc(sc, SIS_DESC_ALIGN, SIS_TX_LIST_SZ, 1258 &sc->sis_tx_list_tag, (uint8_t **)&sc->sis_tx_list, 1259 &sc->sis_tx_list_map, &sc->sis_tx_paddr, "TX ring"); 1260 if (error) 1261 return (error); 1262 1263 /* Create tag for RX mbufs. */ 1264 error = bus_dma_tag_create(sc->sis_parent_tag, SIS_RX_BUF_ALIGN, 0, 1265 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, 1266 MCLBYTES, 0, NULL, NULL, &sc->sis_rx_tag); 1267 if (error) { 1268 device_printf(sc->sis_dev, "could not allocate RX dma tag\n"); 1269 return (error); 1270 } 1271 1272 /* Create tag for TX mbufs. */ 1273 error = bus_dma_tag_create(sc->sis_parent_tag, 1, 0, 1274 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 1275 MCLBYTES * SIS_MAXTXSEGS, SIS_MAXTXSEGS, MCLBYTES, 0, NULL, NULL, 1276 &sc->sis_tx_tag); 1277 if (error) { 1278 device_printf(sc->sis_dev, "could not allocate TX dma tag\n"); 1279 return (error); 1280 } 1281 1282 /* Create DMA maps for RX buffers. */ 1283 error = bus_dmamap_create(sc->sis_rx_tag, 0, &sc->sis_rx_sparemap); 1284 if (error) { 1285 device_printf(sc->sis_dev, 1286 "can't create spare DMA map for RX\n"); 1287 return (error); 1288 } 1289 for (i = 0; i < SIS_RX_LIST_CNT; i++) { 1290 rxd = &sc->sis_rxdesc[i]; 1291 rxd->rx_m = NULL; 1292 error = bus_dmamap_create(sc->sis_rx_tag, 0, &rxd->rx_dmamap); 1293 if (error) { 1294 device_printf(sc->sis_dev, 1295 "can't create DMA map for RX\n"); 1296 return (error); 1297 } 1298 } 1299 1300 /* Create DMA maps for TX buffers. */ 1301 for (i = 0; i < SIS_TX_LIST_CNT; i++) { 1302 txd = &sc->sis_txdesc[i]; 1303 txd->tx_m = NULL; 1304 error = bus_dmamap_create(sc->sis_tx_tag, 0, &txd->tx_dmamap); 1305 if (error) { 1306 device_printf(sc->sis_dev, 1307 "can't create DMA map for TX\n"); 1308 return (error); 1309 } 1310 } 1311 1312 return (0); 1313 } 1314 1315 static void 1316 sis_dma_free(struct sis_softc *sc) 1317 { 1318 struct sis_rxdesc *rxd; 1319 struct sis_txdesc *txd; 1320 int i; 1321 1322 /* Destroy DMA maps for RX buffers. */ 1323 for (i = 0; i < SIS_RX_LIST_CNT; i++) { 1324 rxd = &sc->sis_rxdesc[i]; 1325 if (rxd->rx_dmamap) 1326 bus_dmamap_destroy(sc->sis_rx_tag, rxd->rx_dmamap); 1327 } 1328 if (sc->sis_rx_sparemap) 1329 bus_dmamap_destroy(sc->sis_rx_tag, sc->sis_rx_sparemap); 1330 1331 /* Destroy DMA maps for TX buffers. */ 1332 for (i = 0; i < SIS_TX_LIST_CNT; i++) { 1333 txd = &sc->sis_txdesc[i]; 1334 if (txd->tx_dmamap) 1335 bus_dmamap_destroy(sc->sis_tx_tag, txd->tx_dmamap); 1336 } 1337 1338 if (sc->sis_rx_tag) 1339 bus_dma_tag_destroy(sc->sis_rx_tag); 1340 if (sc->sis_tx_tag) 1341 bus_dma_tag_destroy(sc->sis_tx_tag); 1342 1343 /* Destroy RX ring. */ 1344 if (sc->sis_rx_paddr) 1345 bus_dmamap_unload(sc->sis_rx_list_tag, sc->sis_rx_list_map); 1346 if (sc->sis_rx_list) 1347 bus_dmamem_free(sc->sis_rx_list_tag, sc->sis_rx_list, 1348 sc->sis_rx_list_map); 1349 1350 if (sc->sis_rx_list_tag) 1351 bus_dma_tag_destroy(sc->sis_rx_list_tag); 1352 1353 /* Destroy TX ring. */ 1354 if (sc->sis_tx_paddr) 1355 bus_dmamap_unload(sc->sis_tx_list_tag, sc->sis_tx_list_map); 1356 1357 if (sc->sis_tx_list) 1358 bus_dmamem_free(sc->sis_tx_list_tag, sc->sis_tx_list, 1359 sc->sis_tx_list_map); 1360 1361 if (sc->sis_tx_list_tag) 1362 bus_dma_tag_destroy(sc->sis_tx_list_tag); 1363 1364 /* Destroy the parent tag. */ 1365 if (sc->sis_parent_tag) 1366 bus_dma_tag_destroy(sc->sis_parent_tag); 1367 } 1368 1369 /* 1370 * Initialize the TX and RX descriptors and allocate mbufs for them. Note that 1371 * we arrange the descriptors in a closed ring, so that the last descriptor 1372 * points back to the first. 1373 */ 1374 static int 1375 sis_ring_init(struct sis_softc *sc) 1376 { 1377 struct sis_rxdesc *rxd; 1378 struct sis_txdesc *txd; 1379 bus_addr_t next; 1380 int error, i; 1381 1382 bzero(&sc->sis_tx_list[0], SIS_TX_LIST_SZ); 1383 for (i = 0; i < SIS_TX_LIST_CNT; i++) { 1384 txd = &sc->sis_txdesc[i]; 1385 txd->tx_m = NULL; 1386 if (i == SIS_TX_LIST_CNT - 1) 1387 next = SIS_TX_RING_ADDR(sc, 0); 1388 else 1389 next = SIS_TX_RING_ADDR(sc, i + 1); 1390 sc->sis_tx_list[i].sis_next = htole32(SIS_ADDR_LO(next)); 1391 } 1392 sc->sis_tx_prod = sc->sis_tx_cons = sc->sis_tx_cnt = 0; 1393 bus_dmamap_sync(sc->sis_tx_list_tag, sc->sis_tx_list_map, 1394 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1395 1396 sc->sis_rx_cons = 0; 1397 bzero(&sc->sis_rx_list[0], SIS_RX_LIST_SZ); 1398 for (i = 0; i < SIS_RX_LIST_CNT; i++) { 1399 rxd = &sc->sis_rxdesc[i]; 1400 rxd->rx_desc = &sc->sis_rx_list[i]; 1401 if (i == SIS_RX_LIST_CNT - 1) 1402 next = SIS_RX_RING_ADDR(sc, 0); 1403 else 1404 next = SIS_RX_RING_ADDR(sc, i + 1); 1405 rxd->rx_desc->sis_next = htole32(SIS_ADDR_LO(next)); 1406 error = sis_newbuf(sc, rxd); 1407 if (error) 1408 return (error); 1409 } 1410 bus_dmamap_sync(sc->sis_rx_list_tag, sc->sis_rx_list_map, 1411 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1412 1413 return (0); 1414 } 1415 1416 /* 1417 * Initialize an RX descriptor and attach an MBUF cluster. 1418 */ 1419 static int 1420 sis_newbuf(struct sis_softc *sc, struct sis_rxdesc *rxd) 1421 { 1422 struct mbuf *m; 1423 bus_dma_segment_t segs[1]; 1424 bus_dmamap_t map; 1425 int nsegs; 1426 1427 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1428 if (m == NULL) 1429 return (ENOBUFS); 1430 m->m_len = m->m_pkthdr.len = SIS_RXLEN; 1431 #ifndef __NO_STRICT_ALIGNMENT 1432 m_adj(m, SIS_RX_BUF_ALIGN); 1433 #endif 1434 1435 if (bus_dmamap_load_mbuf_sg(sc->sis_rx_tag, sc->sis_rx_sparemap, m, 1436 segs, &nsegs, 0) != 0) { 1437 m_freem(m); 1438 return (ENOBUFS); 1439 } 1440 KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs)); 1441 1442 if (rxd->rx_m != NULL) { 1443 bus_dmamap_sync(sc->sis_rx_tag, rxd->rx_dmamap, 1444 BUS_DMASYNC_POSTREAD); 1445 bus_dmamap_unload(sc->sis_rx_tag, rxd->rx_dmamap); 1446 } 1447 map = rxd->rx_dmamap; 1448 rxd->rx_dmamap = sc->sis_rx_sparemap; 1449 sc->sis_rx_sparemap = map; 1450 bus_dmamap_sync(sc->sis_rx_tag, rxd->rx_dmamap, BUS_DMASYNC_PREREAD); 1451 rxd->rx_m = m; 1452 rxd->rx_desc->sis_ptr = htole32(SIS_ADDR_LO(segs[0].ds_addr)); 1453 rxd->rx_desc->sis_cmdsts = htole32(SIS_RXLEN); 1454 return (0); 1455 } 1456 1457 static __inline void 1458 sis_discard_rxbuf(struct sis_rxdesc *rxd) 1459 { 1460 1461 rxd->rx_desc->sis_cmdsts = htole32(SIS_RXLEN); 1462 } 1463 1464 #ifndef __NO_STRICT_ALIGNMENT 1465 static __inline void 1466 sis_fixup_rx(struct mbuf *m) 1467 { 1468 uint16_t *src, *dst; 1469 int i; 1470 1471 src = mtod(m, uint16_t *); 1472 dst = src - (SIS_RX_BUF_ALIGN - ETHER_ALIGN) / sizeof(*src); 1473 1474 for (i = 0; i < (m->m_len / sizeof(uint16_t) + 1); i++) 1475 *dst++ = *src++; 1476 1477 m->m_data -= SIS_RX_BUF_ALIGN - ETHER_ALIGN; 1478 } 1479 #endif 1480 1481 /* 1482 * A frame has been uploaded: pass the resulting mbuf chain up to 1483 * the higher level protocols. 1484 */ 1485 static int 1486 sis_rxeof(struct sis_softc *sc) 1487 { 1488 struct mbuf *m; 1489 struct ifnet *ifp; 1490 struct sis_rxdesc *rxd; 1491 struct sis_desc *cur_rx; 1492 int prog, rx_cons, rx_npkts = 0, total_len; 1493 uint32_t rxstat; 1494 1495 SIS_LOCK_ASSERT(sc); 1496 1497 bus_dmamap_sync(sc->sis_rx_list_tag, sc->sis_rx_list_map, 1498 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1499 1500 rx_cons = sc->sis_rx_cons; 1501 ifp = sc->sis_ifp; 1502 1503 for (prog = 0; (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0; 1504 SIS_INC(rx_cons, SIS_RX_LIST_CNT), prog++) { 1505 #ifdef DEVICE_POLLING 1506 if (ifp->if_capenable & IFCAP_POLLING) { 1507 if (sc->rxcycles <= 0) 1508 break; 1509 sc->rxcycles--; 1510 } 1511 #endif 1512 cur_rx = &sc->sis_rx_list[rx_cons]; 1513 rxstat = le32toh(cur_rx->sis_cmdsts); 1514 if ((rxstat & SIS_CMDSTS_OWN) == 0) 1515 break; 1516 rxd = &sc->sis_rxdesc[rx_cons]; 1517 1518 total_len = (rxstat & SIS_CMDSTS_BUFLEN) - ETHER_CRC_LEN; 1519 if ((ifp->if_capenable & IFCAP_VLAN_MTU) != 0 && 1520 total_len <= (ETHER_MAX_LEN + ETHER_VLAN_ENCAP_LEN - 1521 ETHER_CRC_LEN)) 1522 rxstat &= ~SIS_RXSTAT_GIANT; 1523 if (SIS_RXSTAT_ERROR(rxstat) != 0) { 1524 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1525 if (rxstat & SIS_RXSTAT_COLL) 1526 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1); 1527 sis_discard_rxbuf(rxd); 1528 continue; 1529 } 1530 1531 /* Add a new receive buffer to the ring. */ 1532 m = rxd->rx_m; 1533 if (sis_newbuf(sc, rxd) != 0) { 1534 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 1535 sis_discard_rxbuf(rxd); 1536 continue; 1537 } 1538 1539 /* No errors; receive the packet. */ 1540 m->m_pkthdr.len = m->m_len = total_len; 1541 #ifndef __NO_STRICT_ALIGNMENT 1542 /* 1543 * On architectures without alignment problems we try to 1544 * allocate a new buffer for the receive ring, and pass up 1545 * the one where the packet is already, saving the expensive 1546 * copy operation. 1547 */ 1548 sis_fixup_rx(m); 1549 #endif 1550 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 1551 m->m_pkthdr.rcvif = ifp; 1552 1553 SIS_UNLOCK(sc); 1554 (*ifp->if_input)(ifp, m); 1555 SIS_LOCK(sc); 1556 rx_npkts++; 1557 } 1558 1559 if (prog > 0) { 1560 sc->sis_rx_cons = rx_cons; 1561 bus_dmamap_sync(sc->sis_rx_list_tag, sc->sis_rx_list_map, 1562 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1563 } 1564 1565 return (rx_npkts); 1566 } 1567 1568 /* 1569 * A frame was downloaded to the chip. It's safe for us to clean up 1570 * the list buffers. 1571 */ 1572 1573 static void 1574 sis_txeof(struct sis_softc *sc) 1575 { 1576 struct ifnet *ifp; 1577 struct sis_desc *cur_tx; 1578 struct sis_txdesc *txd; 1579 uint32_t cons, txstat; 1580 1581 SIS_LOCK_ASSERT(sc); 1582 1583 cons = sc->sis_tx_cons; 1584 if (cons == sc->sis_tx_prod) 1585 return; 1586 1587 ifp = sc->sis_ifp; 1588 bus_dmamap_sync(sc->sis_tx_list_tag, sc->sis_tx_list_map, 1589 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1590 1591 /* 1592 * Go through our tx list and free mbufs for those 1593 * frames that have been transmitted. 1594 */ 1595 for (; cons != sc->sis_tx_prod; SIS_INC(cons, SIS_TX_LIST_CNT)) { 1596 cur_tx = &sc->sis_tx_list[cons]; 1597 txstat = le32toh(cur_tx->sis_cmdsts); 1598 if ((txstat & SIS_CMDSTS_OWN) != 0) 1599 break; 1600 txd = &sc->sis_txdesc[cons]; 1601 if (txd->tx_m != NULL) { 1602 bus_dmamap_sync(sc->sis_tx_tag, txd->tx_dmamap, 1603 BUS_DMASYNC_POSTWRITE); 1604 bus_dmamap_unload(sc->sis_tx_tag, txd->tx_dmamap); 1605 m_freem(txd->tx_m); 1606 txd->tx_m = NULL; 1607 if ((txstat & SIS_CMDSTS_PKT_OK) != 0) { 1608 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1609 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1610 (txstat & SIS_TXSTAT_COLLCNT) >> 16); 1611 } else { 1612 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1613 if (txstat & SIS_TXSTAT_EXCESSCOLLS) 1614 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1); 1615 if (txstat & SIS_TXSTAT_OUTOFWINCOLL) 1616 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1); 1617 } 1618 } 1619 sc->sis_tx_cnt--; 1620 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1621 } 1622 sc->sis_tx_cons = cons; 1623 if (sc->sis_tx_cnt == 0) 1624 sc->sis_watchdog_timer = 0; 1625 } 1626 1627 static void 1628 sis_tick(void *xsc) 1629 { 1630 struct sis_softc *sc; 1631 struct mii_data *mii; 1632 1633 sc = xsc; 1634 SIS_LOCK_ASSERT(sc); 1635 1636 mii = device_get_softc(sc->sis_miibus); 1637 mii_tick(mii); 1638 sis_watchdog(sc); 1639 if ((sc->sis_flags & SIS_FLAG_LINK) == 0) 1640 sis_miibus_statchg(sc->sis_dev); 1641 callout_reset(&sc->sis_stat_ch, hz, sis_tick, sc); 1642 } 1643 1644 #ifdef DEVICE_POLLING 1645 static poll_handler_t sis_poll; 1646 1647 static int 1648 sis_poll(struct ifnet *ifp, enum poll_cmd cmd, int count) 1649 { 1650 struct sis_softc *sc = ifp->if_softc; 1651 int rx_npkts = 0; 1652 1653 SIS_LOCK(sc); 1654 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1655 SIS_UNLOCK(sc); 1656 return (rx_npkts); 1657 } 1658 1659 /* 1660 * On the sis, reading the status register also clears it. 1661 * So before returning to intr mode we must make sure that all 1662 * possible pending sources of interrupts have been served. 1663 * In practice this means run to completion the *eof routines, 1664 * and then call the interrupt routine 1665 */ 1666 sc->rxcycles = count; 1667 rx_npkts = sis_rxeof(sc); 1668 sis_txeof(sc); 1669 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) 1670 sis_startl(ifp); 1671 1672 if (sc->rxcycles > 0 || cmd == POLL_AND_CHECK_STATUS) { 1673 uint32_t status; 1674 1675 /* Reading the ISR register clears all interrupts. */ 1676 status = CSR_READ_4(sc, SIS_ISR); 1677 1678 if (status & (SIS_ISR_RX_ERR|SIS_ISR_RX_OFLOW)) 1679 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1680 1681 if (status & (SIS_ISR_RX_IDLE)) 1682 SIS_SETBIT(sc, SIS_CSR, SIS_CSR_RX_ENABLE); 1683 1684 if (status & SIS_ISR_SYSERR) { 1685 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1686 sis_initl(sc); 1687 } 1688 } 1689 1690 SIS_UNLOCK(sc); 1691 return (rx_npkts); 1692 } 1693 #endif /* DEVICE_POLLING */ 1694 1695 static void 1696 sis_intr(void *arg) 1697 { 1698 struct sis_softc *sc; 1699 struct ifnet *ifp; 1700 uint32_t status; 1701 1702 sc = arg; 1703 ifp = sc->sis_ifp; 1704 1705 SIS_LOCK(sc); 1706 #ifdef DEVICE_POLLING 1707 if (ifp->if_capenable & IFCAP_POLLING) { 1708 SIS_UNLOCK(sc); 1709 return; 1710 } 1711 #endif 1712 1713 /* Reading the ISR register clears all interrupts. */ 1714 status = CSR_READ_4(sc, SIS_ISR); 1715 if ((status & SIS_INTRS) == 0) { 1716 /* Not ours. */ 1717 SIS_UNLOCK(sc); 1718 return; 1719 } 1720 1721 /* Disable interrupts. */ 1722 CSR_WRITE_4(sc, SIS_IER, 0); 1723 1724 for (;(status & SIS_INTRS) != 0;) { 1725 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1726 break; 1727 if (status & 1728 (SIS_ISR_TX_DESC_OK | SIS_ISR_TX_ERR | 1729 SIS_ISR_TX_OK | SIS_ISR_TX_IDLE) ) 1730 sis_txeof(sc); 1731 1732 if (status & (SIS_ISR_RX_DESC_OK | SIS_ISR_RX_OK | 1733 SIS_ISR_RX_ERR | SIS_ISR_RX_IDLE)) 1734 sis_rxeof(sc); 1735 1736 if (status & SIS_ISR_RX_OFLOW) 1737 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1738 1739 if (status & (SIS_ISR_RX_IDLE)) 1740 SIS_SETBIT(sc, SIS_CSR, SIS_CSR_RX_ENABLE); 1741 1742 if (status & SIS_ISR_SYSERR) { 1743 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1744 sis_initl(sc); 1745 SIS_UNLOCK(sc); 1746 return; 1747 } 1748 status = CSR_READ_4(sc, SIS_ISR); 1749 } 1750 1751 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1752 /* Re-enable interrupts. */ 1753 CSR_WRITE_4(sc, SIS_IER, 1); 1754 1755 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) 1756 sis_startl(ifp); 1757 } 1758 1759 SIS_UNLOCK(sc); 1760 } 1761 1762 /* 1763 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 1764 * pointers to the fragment pointers. 1765 */ 1766 static int 1767 sis_encap(struct sis_softc *sc, struct mbuf **m_head) 1768 { 1769 struct mbuf *m; 1770 struct sis_txdesc *txd; 1771 struct sis_desc *f; 1772 bus_dma_segment_t segs[SIS_MAXTXSEGS]; 1773 bus_dmamap_t map; 1774 int error, i, frag, nsegs, prod; 1775 int padlen; 1776 1777 prod = sc->sis_tx_prod; 1778 txd = &sc->sis_txdesc[prod]; 1779 if ((sc->sis_flags & SIS_FLAG_MANUAL_PAD) != 0 && 1780 (*m_head)->m_pkthdr.len < SIS_MIN_FRAMELEN) { 1781 m = *m_head; 1782 padlen = SIS_MIN_FRAMELEN - m->m_pkthdr.len; 1783 if (M_WRITABLE(m) == 0) { 1784 /* Get a writable copy. */ 1785 m = m_dup(*m_head, M_NOWAIT); 1786 m_freem(*m_head); 1787 if (m == NULL) { 1788 *m_head = NULL; 1789 return (ENOBUFS); 1790 } 1791 *m_head = m; 1792 } 1793 if (m->m_next != NULL || M_TRAILINGSPACE(m) < padlen) { 1794 m = m_defrag(m, M_NOWAIT); 1795 if (m == NULL) { 1796 m_freem(*m_head); 1797 *m_head = NULL; 1798 return (ENOBUFS); 1799 } 1800 } 1801 /* 1802 * Manually pad short frames, and zero the pad space 1803 * to avoid leaking data. 1804 */ 1805 bzero(mtod(m, char *) + m->m_pkthdr.len, padlen); 1806 m->m_pkthdr.len += padlen; 1807 m->m_len = m->m_pkthdr.len; 1808 *m_head = m; 1809 } 1810 error = bus_dmamap_load_mbuf_sg(sc->sis_tx_tag, txd->tx_dmamap, 1811 *m_head, segs, &nsegs, 0); 1812 if (error == EFBIG) { 1813 m = m_collapse(*m_head, M_NOWAIT, SIS_MAXTXSEGS); 1814 if (m == NULL) { 1815 m_freem(*m_head); 1816 *m_head = NULL; 1817 return (ENOBUFS); 1818 } 1819 *m_head = m; 1820 error = bus_dmamap_load_mbuf_sg(sc->sis_tx_tag, txd->tx_dmamap, 1821 *m_head, segs, &nsegs, 0); 1822 if (error != 0) { 1823 m_freem(*m_head); 1824 *m_head = NULL; 1825 return (error); 1826 } 1827 } else if (error != 0) 1828 return (error); 1829 1830 /* Check for descriptor overruns. */ 1831 if (sc->sis_tx_cnt + nsegs > SIS_TX_LIST_CNT - 1) { 1832 bus_dmamap_unload(sc->sis_tx_tag, txd->tx_dmamap); 1833 return (ENOBUFS); 1834 } 1835 1836 bus_dmamap_sync(sc->sis_tx_tag, txd->tx_dmamap, BUS_DMASYNC_PREWRITE); 1837 1838 frag = prod; 1839 for (i = 0; i < nsegs; i++) { 1840 f = &sc->sis_tx_list[prod]; 1841 if (i == 0) 1842 f->sis_cmdsts = htole32(segs[i].ds_len | 1843 SIS_CMDSTS_MORE); 1844 else 1845 f->sis_cmdsts = htole32(segs[i].ds_len | 1846 SIS_CMDSTS_OWN | SIS_CMDSTS_MORE); 1847 f->sis_ptr = htole32(SIS_ADDR_LO(segs[i].ds_addr)); 1848 SIS_INC(prod, SIS_TX_LIST_CNT); 1849 sc->sis_tx_cnt++; 1850 } 1851 1852 /* Update producer index. */ 1853 sc->sis_tx_prod = prod; 1854 1855 /* Remove MORE flag on the last descriptor. */ 1856 prod = (prod - 1) & (SIS_TX_LIST_CNT - 1); 1857 f = &sc->sis_tx_list[prod]; 1858 f->sis_cmdsts &= ~htole32(SIS_CMDSTS_MORE); 1859 1860 /* Lastly transfer ownership of packet to the controller. */ 1861 f = &sc->sis_tx_list[frag]; 1862 f->sis_cmdsts |= htole32(SIS_CMDSTS_OWN); 1863 1864 /* Swap the last and the first dmamaps. */ 1865 map = txd->tx_dmamap; 1866 txd->tx_dmamap = sc->sis_txdesc[prod].tx_dmamap; 1867 sc->sis_txdesc[prod].tx_dmamap = map; 1868 sc->sis_txdesc[prod].tx_m = *m_head; 1869 1870 return (0); 1871 } 1872 1873 static void 1874 sis_start(struct ifnet *ifp) 1875 { 1876 struct sis_softc *sc; 1877 1878 sc = ifp->if_softc; 1879 SIS_LOCK(sc); 1880 sis_startl(ifp); 1881 SIS_UNLOCK(sc); 1882 } 1883 1884 static void 1885 sis_startl(struct ifnet *ifp) 1886 { 1887 struct sis_softc *sc; 1888 struct mbuf *m_head; 1889 int queued; 1890 1891 sc = ifp->if_softc; 1892 1893 SIS_LOCK_ASSERT(sc); 1894 1895 if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != 1896 IFF_DRV_RUNNING || (sc->sis_flags & SIS_FLAG_LINK) == 0) 1897 return; 1898 1899 for (queued = 0; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) && 1900 sc->sis_tx_cnt < SIS_TX_LIST_CNT - 4;) { 1901 IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head); 1902 if (m_head == NULL) 1903 break; 1904 1905 if (sis_encap(sc, &m_head) != 0) { 1906 if (m_head == NULL) 1907 break; 1908 IFQ_DRV_PREPEND(&ifp->if_snd, m_head); 1909 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1910 break; 1911 } 1912 1913 queued++; 1914 1915 /* 1916 * If there's a BPF listener, bounce a copy of this frame 1917 * to him. 1918 */ 1919 BPF_MTAP(ifp, m_head); 1920 } 1921 1922 if (queued) { 1923 /* Transmit */ 1924 bus_dmamap_sync(sc->sis_tx_list_tag, sc->sis_tx_list_map, 1925 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1926 SIS_SETBIT(sc, SIS_CSR, SIS_CSR_TX_ENABLE); 1927 1928 /* 1929 * Set a timeout in case the chip goes out to lunch. 1930 */ 1931 sc->sis_watchdog_timer = 5; 1932 } 1933 } 1934 1935 static void 1936 sis_init(void *xsc) 1937 { 1938 struct sis_softc *sc = xsc; 1939 1940 SIS_LOCK(sc); 1941 sis_initl(sc); 1942 SIS_UNLOCK(sc); 1943 } 1944 1945 static void 1946 sis_initl(struct sis_softc *sc) 1947 { 1948 struct ifnet *ifp = sc->sis_ifp; 1949 struct mii_data *mii; 1950 uint8_t *eaddr; 1951 1952 SIS_LOCK_ASSERT(sc); 1953 1954 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 1955 return; 1956 1957 /* 1958 * Cancel pending I/O and free all RX/TX buffers. 1959 */ 1960 sis_stop(sc); 1961 /* 1962 * Reset the chip to a known state. 1963 */ 1964 sis_reset(sc); 1965 #ifdef notyet 1966 if (sc->sis_type == SIS_TYPE_83815 && sc->sis_srr >= NS_SRR_16A) { 1967 /* 1968 * Configure 400usec of interrupt holdoff. This is based 1969 * on emperical tests on a Soekris 4801. 1970 */ 1971 CSR_WRITE_4(sc, NS_IHR, 0x100 | 4); 1972 } 1973 #endif 1974 1975 mii = device_get_softc(sc->sis_miibus); 1976 1977 /* Set MAC address */ 1978 eaddr = IF_LLADDR(sc->sis_ifp); 1979 if (sc->sis_type == SIS_TYPE_83815) { 1980 CSR_WRITE_4(sc, SIS_RXFILT_CTL, NS_FILTADDR_PAR0); 1981 CSR_WRITE_4(sc, SIS_RXFILT_DATA, eaddr[0] | eaddr[1] << 8); 1982 CSR_WRITE_4(sc, SIS_RXFILT_CTL, NS_FILTADDR_PAR1); 1983 CSR_WRITE_4(sc, SIS_RXFILT_DATA, eaddr[2] | eaddr[3] << 8); 1984 CSR_WRITE_4(sc, SIS_RXFILT_CTL, NS_FILTADDR_PAR2); 1985 CSR_WRITE_4(sc, SIS_RXFILT_DATA, eaddr[4] | eaddr[5] << 8); 1986 } else { 1987 CSR_WRITE_4(sc, SIS_RXFILT_CTL, SIS_FILTADDR_PAR0); 1988 CSR_WRITE_4(sc, SIS_RXFILT_DATA, eaddr[0] | eaddr[1] << 8); 1989 CSR_WRITE_4(sc, SIS_RXFILT_CTL, SIS_FILTADDR_PAR1); 1990 CSR_WRITE_4(sc, SIS_RXFILT_DATA, eaddr[2] | eaddr[3] << 8); 1991 CSR_WRITE_4(sc, SIS_RXFILT_CTL, SIS_FILTADDR_PAR2); 1992 CSR_WRITE_4(sc, SIS_RXFILT_DATA, eaddr[4] | eaddr[5] << 8); 1993 } 1994 1995 /* Init circular TX/RX lists. */ 1996 if (sis_ring_init(sc) != 0) { 1997 device_printf(sc->sis_dev, 1998 "initialization failed: no memory for rx buffers\n"); 1999 sis_stop(sc); 2000 return; 2001 } 2002 2003 if (sc->sis_type == SIS_TYPE_83815) { 2004 if (sc->sis_manual_pad != 0) 2005 sc->sis_flags |= SIS_FLAG_MANUAL_PAD; 2006 else 2007 sc->sis_flags &= ~SIS_FLAG_MANUAL_PAD; 2008 } 2009 2010 /* 2011 * Short Cable Receive Errors (MP21.E) 2012 * also: Page 78 of the DP83815 data sheet (september 2002 version) 2013 * recommends the following register settings "for optimum 2014 * performance." for rev 15C. Set this also for 15D parts as 2015 * they require it in practice. 2016 */ 2017 if (sc->sis_type == SIS_TYPE_83815 && sc->sis_srr <= NS_SRR_15D) { 2018 CSR_WRITE_4(sc, NS_PHY_PAGE, 0x0001); 2019 CSR_WRITE_4(sc, NS_PHY_CR, 0x189C); 2020 /* set val for c2 */ 2021 CSR_WRITE_4(sc, NS_PHY_TDATA, 0x0000); 2022 /* load/kill c2 */ 2023 CSR_WRITE_4(sc, NS_PHY_DSPCFG, 0x5040); 2024 /* rais SD off, from 4 to c */ 2025 CSR_WRITE_4(sc, NS_PHY_SDCFG, 0x008C); 2026 CSR_WRITE_4(sc, NS_PHY_PAGE, 0); 2027 } 2028 2029 sis_rxfilter(sc); 2030 2031 /* 2032 * Load the address of the RX and TX lists. 2033 */ 2034 CSR_WRITE_4(sc, SIS_RX_LISTPTR, SIS_ADDR_LO(sc->sis_rx_paddr)); 2035 CSR_WRITE_4(sc, SIS_TX_LISTPTR, SIS_ADDR_LO(sc->sis_tx_paddr)); 2036 2037 /* SIS_CFG_EDB_MASTER_EN indicates the EDB bus is used instead of 2038 * the PCI bus. When this bit is set, the Max DMA Burst Size 2039 * for TX/RX DMA should be no larger than 16 double words. 2040 */ 2041 if (CSR_READ_4(sc, SIS_CFG) & SIS_CFG_EDB_MASTER_EN) { 2042 CSR_WRITE_4(sc, SIS_RX_CFG, SIS_RXCFG64); 2043 } else { 2044 CSR_WRITE_4(sc, SIS_RX_CFG, SIS_RXCFG256); 2045 } 2046 2047 /* Accept Long Packets for VLAN support */ 2048 SIS_SETBIT(sc, SIS_RX_CFG, SIS_RXCFG_RX_JABBER); 2049 2050 /* 2051 * Assume 100Mbps link, actual MAC configuration is done 2052 * after getting a valid link. 2053 */ 2054 CSR_WRITE_4(sc, SIS_TX_CFG, SIS_TXCFG_100); 2055 2056 /* 2057 * Enable interrupts. 2058 */ 2059 CSR_WRITE_4(sc, SIS_IMR, SIS_INTRS); 2060 #ifdef DEVICE_POLLING 2061 /* 2062 * ... only enable interrupts if we are not polling, make sure 2063 * they are off otherwise. 2064 */ 2065 if (ifp->if_capenable & IFCAP_POLLING) 2066 CSR_WRITE_4(sc, SIS_IER, 0); 2067 else 2068 #endif 2069 CSR_WRITE_4(sc, SIS_IER, 1); 2070 2071 /* Clear MAC disable. */ 2072 SIS_CLRBIT(sc, SIS_CSR, SIS_CSR_TX_DISABLE | SIS_CSR_RX_DISABLE); 2073 2074 sc->sis_flags &= ~SIS_FLAG_LINK; 2075 mii_mediachg(mii); 2076 2077 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2078 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2079 2080 callout_reset(&sc->sis_stat_ch, hz, sis_tick, sc); 2081 } 2082 2083 /* 2084 * Set media options. 2085 */ 2086 static int 2087 sis_ifmedia_upd(struct ifnet *ifp) 2088 { 2089 struct sis_softc *sc; 2090 struct mii_data *mii; 2091 struct mii_softc *miisc; 2092 int error; 2093 2094 sc = ifp->if_softc; 2095 2096 SIS_LOCK(sc); 2097 mii = device_get_softc(sc->sis_miibus); 2098 LIST_FOREACH(miisc, &mii->mii_phys, mii_list) 2099 PHY_RESET(miisc); 2100 error = mii_mediachg(mii); 2101 SIS_UNLOCK(sc); 2102 2103 return (error); 2104 } 2105 2106 /* 2107 * Report current media status. 2108 */ 2109 static void 2110 sis_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 2111 { 2112 struct sis_softc *sc; 2113 struct mii_data *mii; 2114 2115 sc = ifp->if_softc; 2116 2117 SIS_LOCK(sc); 2118 mii = device_get_softc(sc->sis_miibus); 2119 mii_pollstat(mii); 2120 ifmr->ifm_active = mii->mii_media_active; 2121 ifmr->ifm_status = mii->mii_media_status; 2122 SIS_UNLOCK(sc); 2123 } 2124 2125 static int 2126 sis_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 2127 { 2128 struct sis_softc *sc = ifp->if_softc; 2129 struct ifreq *ifr = (struct ifreq *) data; 2130 struct mii_data *mii; 2131 int error = 0, mask; 2132 2133 switch (command) { 2134 case SIOCSIFFLAGS: 2135 SIS_LOCK(sc); 2136 if (ifp->if_flags & IFF_UP) { 2137 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0 && 2138 ((ifp->if_flags ^ sc->sis_if_flags) & 2139 (IFF_PROMISC | IFF_ALLMULTI)) != 0) 2140 sis_rxfilter(sc); 2141 else 2142 sis_initl(sc); 2143 } else if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2144 sis_stop(sc); 2145 sc->sis_if_flags = ifp->if_flags; 2146 SIS_UNLOCK(sc); 2147 break; 2148 case SIOCADDMULTI: 2149 case SIOCDELMULTI: 2150 SIS_LOCK(sc); 2151 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 2152 sis_rxfilter(sc); 2153 SIS_UNLOCK(sc); 2154 break; 2155 case SIOCGIFMEDIA: 2156 case SIOCSIFMEDIA: 2157 mii = device_get_softc(sc->sis_miibus); 2158 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 2159 break; 2160 case SIOCSIFCAP: 2161 SIS_LOCK(sc); 2162 mask = ifr->ifr_reqcap ^ ifp->if_capenable; 2163 #ifdef DEVICE_POLLING 2164 if ((mask & IFCAP_POLLING) != 0 && 2165 (IFCAP_POLLING & ifp->if_capabilities) != 0) { 2166 ifp->if_capenable ^= IFCAP_POLLING; 2167 if ((IFCAP_POLLING & ifp->if_capenable) != 0) { 2168 error = ether_poll_register(sis_poll, ifp); 2169 if (error != 0) { 2170 SIS_UNLOCK(sc); 2171 break; 2172 } 2173 /* Disable interrupts. */ 2174 CSR_WRITE_4(sc, SIS_IER, 0); 2175 } else { 2176 error = ether_poll_deregister(ifp); 2177 /* Enable interrupts. */ 2178 CSR_WRITE_4(sc, SIS_IER, 1); 2179 } 2180 } 2181 #endif /* DEVICE_POLLING */ 2182 if ((mask & IFCAP_WOL) != 0 && 2183 (ifp->if_capabilities & IFCAP_WOL) != 0) { 2184 if ((mask & IFCAP_WOL_UCAST) != 0) 2185 ifp->if_capenable ^= IFCAP_WOL_UCAST; 2186 if ((mask & IFCAP_WOL_MCAST) != 0) 2187 ifp->if_capenable ^= IFCAP_WOL_MCAST; 2188 if ((mask & IFCAP_WOL_MAGIC) != 0) 2189 ifp->if_capenable ^= IFCAP_WOL_MAGIC; 2190 } 2191 SIS_UNLOCK(sc); 2192 break; 2193 default: 2194 error = ether_ioctl(ifp, command, data); 2195 break; 2196 } 2197 2198 return (error); 2199 } 2200 2201 static void 2202 sis_watchdog(struct sis_softc *sc) 2203 { 2204 2205 SIS_LOCK_ASSERT(sc); 2206 2207 if (sc->sis_watchdog_timer == 0 || --sc->sis_watchdog_timer >0) 2208 return; 2209 2210 device_printf(sc->sis_dev, "watchdog timeout\n"); 2211 if_inc_counter(sc->sis_ifp, IFCOUNTER_OERRORS, 1); 2212 2213 sc->sis_ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 2214 sis_initl(sc); 2215 2216 if (!IFQ_DRV_IS_EMPTY(&sc->sis_ifp->if_snd)) 2217 sis_startl(sc->sis_ifp); 2218 } 2219 2220 /* 2221 * Stop the adapter and free any mbufs allocated to the 2222 * RX and TX lists. 2223 */ 2224 static void 2225 sis_stop(struct sis_softc *sc) 2226 { 2227 struct ifnet *ifp; 2228 struct sis_rxdesc *rxd; 2229 struct sis_txdesc *txd; 2230 int i; 2231 2232 SIS_LOCK_ASSERT(sc); 2233 2234 ifp = sc->sis_ifp; 2235 sc->sis_watchdog_timer = 0; 2236 2237 callout_stop(&sc->sis_stat_ch); 2238 2239 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 2240 CSR_WRITE_4(sc, SIS_IER, 0); 2241 CSR_WRITE_4(sc, SIS_IMR, 0); 2242 CSR_READ_4(sc, SIS_ISR); /* clear any interrupts already pending */ 2243 SIS_SETBIT(sc, SIS_CSR, SIS_CSR_TX_DISABLE|SIS_CSR_RX_DISABLE); 2244 DELAY(1000); 2245 CSR_WRITE_4(sc, SIS_TX_LISTPTR, 0); 2246 CSR_WRITE_4(sc, SIS_RX_LISTPTR, 0); 2247 2248 sc->sis_flags &= ~SIS_FLAG_LINK; 2249 2250 /* 2251 * Free data in the RX lists. 2252 */ 2253 for (i = 0; i < SIS_RX_LIST_CNT; i++) { 2254 rxd = &sc->sis_rxdesc[i]; 2255 if (rxd->rx_m != NULL) { 2256 bus_dmamap_sync(sc->sis_rx_tag, rxd->rx_dmamap, 2257 BUS_DMASYNC_POSTREAD); 2258 bus_dmamap_unload(sc->sis_rx_tag, rxd->rx_dmamap); 2259 m_freem(rxd->rx_m); 2260 rxd->rx_m = NULL; 2261 } 2262 } 2263 2264 /* 2265 * Free the TX list buffers. 2266 */ 2267 for (i = 0; i < SIS_TX_LIST_CNT; i++) { 2268 txd = &sc->sis_txdesc[i]; 2269 if (txd->tx_m != NULL) { 2270 bus_dmamap_sync(sc->sis_tx_tag, txd->tx_dmamap, 2271 BUS_DMASYNC_POSTWRITE); 2272 bus_dmamap_unload(sc->sis_tx_tag, txd->tx_dmamap); 2273 m_freem(txd->tx_m); 2274 txd->tx_m = NULL; 2275 } 2276 } 2277 } 2278 2279 /* 2280 * Stop all chip I/O so that the kernel's probe routines don't 2281 * get confused by errant DMAs when rebooting. 2282 */ 2283 static int 2284 sis_shutdown(device_t dev) 2285 { 2286 2287 return (sis_suspend(dev)); 2288 } 2289 2290 static int 2291 sis_suspend(device_t dev) 2292 { 2293 struct sis_softc *sc; 2294 2295 sc = device_get_softc(dev); 2296 SIS_LOCK(sc); 2297 sis_stop(sc); 2298 sis_wol(sc); 2299 SIS_UNLOCK(sc); 2300 return (0); 2301 } 2302 2303 static int 2304 sis_resume(device_t dev) 2305 { 2306 struct sis_softc *sc; 2307 struct ifnet *ifp; 2308 2309 sc = device_get_softc(dev); 2310 SIS_LOCK(sc); 2311 ifp = sc->sis_ifp; 2312 if ((ifp->if_flags & IFF_UP) != 0) { 2313 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 2314 sis_initl(sc); 2315 } 2316 SIS_UNLOCK(sc); 2317 return (0); 2318 } 2319 2320 static void 2321 sis_wol(struct sis_softc *sc) 2322 { 2323 struct ifnet *ifp; 2324 uint32_t val; 2325 uint16_t pmstat; 2326 int pmc; 2327 2328 ifp = sc->sis_ifp; 2329 if ((ifp->if_capenable & IFCAP_WOL) == 0) 2330 return; 2331 2332 if (sc->sis_type == SIS_TYPE_83815) { 2333 /* Reset RXDP. */ 2334 CSR_WRITE_4(sc, SIS_RX_LISTPTR, 0); 2335 2336 /* Configure WOL events. */ 2337 CSR_READ_4(sc, NS_WCSR); 2338 val = 0; 2339 if ((ifp->if_capenable & IFCAP_WOL_UCAST) != 0) 2340 val |= NS_WCSR_WAKE_UCAST; 2341 if ((ifp->if_capenable & IFCAP_WOL_MCAST) != 0) 2342 val |= NS_WCSR_WAKE_MCAST; 2343 if ((ifp->if_capenable & IFCAP_WOL_MAGIC) != 0) 2344 val |= NS_WCSR_WAKE_MAGIC; 2345 CSR_WRITE_4(sc, NS_WCSR, val); 2346 /* Enable PME and clear PMESTS. */ 2347 val = CSR_READ_4(sc, NS_CLKRUN); 2348 val |= NS_CLKRUN_PMEENB | NS_CLKRUN_PMESTS; 2349 CSR_WRITE_4(sc, NS_CLKRUN, val); 2350 /* Enable silent RX mode. */ 2351 SIS_SETBIT(sc, SIS_CSR, SIS_CSR_RX_ENABLE); 2352 } else { 2353 if (pci_find_cap(sc->sis_dev, PCIY_PMG, &pmc) != 0) 2354 return; 2355 val = 0; 2356 if ((ifp->if_capenable & IFCAP_WOL_MAGIC) != 0) 2357 val |= SIS_PWRMAN_WOL_MAGIC; 2358 CSR_WRITE_4(sc, SIS_PWRMAN_CTL, val); 2359 /* Request PME. */ 2360 pmstat = pci_read_config(sc->sis_dev, 2361 pmc + PCIR_POWER_STATUS, 2); 2362 pmstat &= ~(PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE); 2363 if ((ifp->if_capenable & IFCAP_WOL_MAGIC) != 0) 2364 pmstat |= PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE; 2365 pci_write_config(sc->sis_dev, 2366 pmc + PCIR_POWER_STATUS, pmstat, 2); 2367 } 2368 } 2369 2370 static void 2371 sis_add_sysctls(struct sis_softc *sc) 2372 { 2373 struct sysctl_ctx_list *ctx; 2374 struct sysctl_oid_list *children; 2375 2376 ctx = device_get_sysctl_ctx(sc->sis_dev); 2377 children = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->sis_dev)); 2378 2379 /* 2380 * Unlike most other controllers, NS DP83815/DP83816 controllers 2381 * seem to pad with 0xFF when it encounter short frames. According 2382 * to RFC 1042 the pad bytes should be 0x00. Turning this tunable 2383 * on will have driver pad manully but it's disabled by default 2384 * because it will consume extra CPU cycles for short frames. 2385 */ 2386 sc->sis_manual_pad = 0; 2387 SYSCTL_ADD_INT(ctx, children, OID_AUTO, "manual_pad", 2388 CTLFLAG_RWTUN, &sc->sis_manual_pad, 0, "Manually pad short frames"); 2389 } 2390 2391 static device_method_t sis_methods[] = { 2392 /* Device interface */ 2393 DEVMETHOD(device_probe, sis_probe), 2394 DEVMETHOD(device_attach, sis_attach), 2395 DEVMETHOD(device_detach, sis_detach), 2396 DEVMETHOD(device_shutdown, sis_shutdown), 2397 DEVMETHOD(device_suspend, sis_suspend), 2398 DEVMETHOD(device_resume, sis_resume), 2399 2400 /* MII interface */ 2401 DEVMETHOD(miibus_readreg, sis_miibus_readreg), 2402 DEVMETHOD(miibus_writereg, sis_miibus_writereg), 2403 DEVMETHOD(miibus_statchg, sis_miibus_statchg), 2404 2405 DEVMETHOD_END 2406 }; 2407 2408 static driver_t sis_driver = { 2409 "sis", 2410 sis_methods, 2411 sizeof(struct sis_softc) 2412 }; 2413 2414 static devclass_t sis_devclass; 2415 2416 DRIVER_MODULE(sis, pci, sis_driver, sis_devclass, 0, 0); 2417 DRIVER_MODULE(miibus, sis, miibus_driver, miibus_devclass, 0, 0); 2418