Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/sf/if_sf.c
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1 /*- 2 * Copyright (c) 1997, 1998, 1999 3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: releng/8.0/sys/dev/sf/if_sf.c 195049 2009-06-26 11:45:06Z rwatson $"); 35 36 /* 37 * Adaptec AIC-6915 "Starfire" PCI fast ethernet driver for FreeBSD. 38 * Programming manual is available from: 39 * http://download.adaptec.com/pdfs/user_guides/aic6915_pg.pdf. 40 * 41 * Written by Bill Paul <wpaul@ctr.columbia.edu> 42 * Department of Electical Engineering 43 * Columbia University, New York City 44 */ 45 /* 46 * The Adaptec AIC-6915 "Starfire" is a 64-bit 10/100 PCI ethernet 47 * controller designed with flexibility and reducing CPU load in mind. 48 * The Starfire offers high and low priority buffer queues, a 49 * producer/consumer index mechanism and several different buffer 50 * queue and completion queue descriptor types. Any one of a number 51 * of different driver designs can be used, depending on system and 52 * OS requirements. This driver makes use of type2 transmit frame 53 * descriptors to take full advantage of fragmented packets buffers 54 * and two RX buffer queues prioritized on size (one queue for small 55 * frames that will fit into a single mbuf, another with full size 56 * mbuf clusters for everything else). The producer/consumer indexes 57 * and completion queues are also used. 58 * 59 * One downside to the Starfire has to do with alignment: buffer 60 * queues must be aligned on 256-byte boundaries, and receive buffers 61 * must be aligned on longword boundaries. The receive buffer alignment 62 * causes problems on the strict alignment architecture, where the 63 * packet payload should be longword aligned. There is no simple way 64 * around this. 65 * 66 * For receive filtering, the Starfire offers 16 perfect filter slots 67 * and a 512-bit hash table. 68 * 69 * The Starfire has no internal transceiver, relying instead on an 70 * external MII-based transceiver. Accessing registers on external 71 * PHYs is done through a special register map rather than with the 72 * usual bitbang MDIO method. 73 * 74 * Acesssing the registers on the Starfire is a little tricky. The 75 * Starfire has a 512K internal register space. When programmed for 76 * PCI memory mapped mode, the entire register space can be accessed 77 * directly. However in I/O space mode, only 256 bytes are directly 78 * mapped into PCI I/O space. The other registers can be accessed 79 * indirectly using the SF_INDIRECTIO_ADDR and SF_INDIRECTIO_DATA 80 * registers inside the 256-byte I/O window. 81 */ 82 83 #ifdef HAVE_KERNEL_OPTION_HEADERS 84 #include "opt_device_polling.h" 85 #endif 86 87 #include <sys/param.h> 88 #include <sys/systm.h> 89 #include <sys/bus.h> 90 #include <sys/endian.h> 91 #include <sys/kernel.h> 92 #include <sys/malloc.h> 93 #include <sys/mbuf.h> 94 #include <sys/rman.h> 95 #include <sys/module.h> 96 #include <sys/socket.h> 97 #include <sys/sockio.h> 98 #include <sys/sysctl.h> 99 #include <sys/taskqueue.h> 100 101 #include <net/bpf.h> 102 #include <net/if.h> 103 #include <net/if_arp.h> 104 #include <net/ethernet.h> 105 #include <net/if_dl.h> 106 #include <net/if_media.h> 107 #include <net/if_types.h> 108 #include <net/if_vlan_var.h> 109 110 #include <dev/mii/mii.h> 111 #include <dev/mii/miivar.h> 112 113 #include <dev/pci/pcireg.h> 114 #include <dev/pci/pcivar.h> 115 116 #include <machine/bus.h> 117 118 #include <dev/sf/if_sfreg.h> 119 #include <dev/sf/starfire_rx.h> 120 #include <dev/sf/starfire_tx.h> 121 122 /* "device miibus" required. See GENERIC if you get errors here. */ 123 #include "miibus_if.h" 124 125 MODULE_DEPEND(sf, pci, 1, 1, 1); 126 MODULE_DEPEND(sf, ether, 1, 1, 1); 127 MODULE_DEPEND(sf, miibus, 1, 1, 1); 128 129 #undef SF_GFP_DEBUG 130 #define SF_CSUM_FEATURES (CSUM_TCP | CSUM_UDP) 131 /* Define this to activate partial TCP/UDP checksum offload. */ 132 #undef SF_PARTIAL_CSUM_SUPPORT 133 134 static struct sf_type sf_devs[] = { 135 { AD_VENDORID, AD_DEVICEID_STARFIRE, "Adaptec AIC-6915 10/100BaseTX", 136 AD_SUBSYSID_62011_REV0, "Adaptec ANA-62011 (rev 0) 10/100BaseTX" }, 137 { AD_VENDORID, AD_DEVICEID_STARFIRE, "Adaptec AIC-6915 10/100BaseTX", 138 AD_SUBSYSID_62011_REV1, "Adaptec ANA-62011 (rev 1) 10/100BaseTX" }, 139 { AD_VENDORID, AD_DEVICEID_STARFIRE, "Adaptec AIC-6915 10/100BaseTX", 140 AD_SUBSYSID_62022, "Adaptec ANA-62022 10/100BaseTX" }, 141 { AD_VENDORID, AD_DEVICEID_STARFIRE, "Adaptec AIC-6915 10/100BaseTX", 142 AD_SUBSYSID_62044_REV0, "Adaptec ANA-62044 (rev 0) 10/100BaseTX" }, 143 { AD_VENDORID, AD_DEVICEID_STARFIRE, "Adaptec AIC-6915 10/100BaseTX", 144 AD_SUBSYSID_62044_REV1, "Adaptec ANA-62044 (rev 1) 10/100BaseTX" }, 145 { AD_VENDORID, AD_DEVICEID_STARFIRE, "Adaptec AIC-6915 10/100BaseTX", 146 AD_SUBSYSID_62020, "Adaptec ANA-62020 10/100BaseFX" }, 147 { AD_VENDORID, AD_DEVICEID_STARFIRE, "Adaptec AIC-6915 10/100BaseTX", 148 AD_SUBSYSID_69011, "Adaptec ANA-69011 10/100BaseTX" }, 149 }; 150 151 static int sf_probe(device_t); 152 static int sf_attach(device_t); 153 static int sf_detach(device_t); 154 static int sf_shutdown(device_t); 155 static int sf_suspend(device_t); 156 static int sf_resume(device_t); 157 static void sf_intr(void *); 158 static void sf_tick(void *); 159 static void sf_stats_update(struct sf_softc *); 160 #ifndef __NO_STRICT_ALIGNMENT 161 static __inline void sf_fixup_rx(struct mbuf *); 162 #endif 163 static int sf_rxeof(struct sf_softc *); 164 static void sf_txeof(struct sf_softc *); 165 static int sf_encap(struct sf_softc *, struct mbuf **); 166 static void sf_start(struct ifnet *); 167 static void sf_start_locked(struct ifnet *); 168 static int sf_ioctl(struct ifnet *, u_long, caddr_t); 169 static void sf_download_fw(struct sf_softc *); 170 static void sf_init(void *); 171 static void sf_init_locked(struct sf_softc *); 172 static void sf_stop(struct sf_softc *); 173 static void sf_watchdog(struct sf_softc *); 174 static int sf_ifmedia_upd(struct ifnet *); 175 static void sf_ifmedia_sts(struct ifnet *, struct ifmediareq *); 176 static void sf_reset(struct sf_softc *); 177 static int sf_dma_alloc(struct sf_softc *); 178 static void sf_dma_free(struct sf_softc *); 179 static int sf_init_rx_ring(struct sf_softc *); 180 static void sf_init_tx_ring(struct sf_softc *); 181 static int sf_newbuf(struct sf_softc *, int); 182 static void sf_rxfilter(struct sf_softc *); 183 static int sf_setperf(struct sf_softc *, int, uint8_t *); 184 static int sf_sethash(struct sf_softc *, caddr_t, int); 185 #ifdef notdef 186 static int sf_setvlan(struct sf_softc *, int, uint32_t); 187 #endif 188 189 static uint8_t sf_read_eeprom(struct sf_softc *, int); 190 191 static int sf_miibus_readreg(device_t, int, int); 192 static int sf_miibus_writereg(device_t, int, int, int); 193 static void sf_miibus_statchg(device_t); 194 static void sf_link_task(void *, int); 195 #ifdef DEVICE_POLLING 196 static int sf_poll(struct ifnet *ifp, enum poll_cmd cmd, int count); 197 #endif 198 199 static uint32_t csr_read_4(struct sf_softc *, int); 200 static void csr_write_4(struct sf_softc *, int, uint32_t); 201 static void sf_txthresh_adjust(struct sf_softc *); 202 static int sf_sysctl_stats(SYSCTL_HANDLER_ARGS); 203 static int sysctl_int_range(SYSCTL_HANDLER_ARGS, int, int); 204 static int sysctl_hw_sf_int_mod(SYSCTL_HANDLER_ARGS); 205 206 static device_method_t sf_methods[] = { 207 /* Device interface */ 208 DEVMETHOD(device_probe, sf_probe), 209 DEVMETHOD(device_attach, sf_attach), 210 DEVMETHOD(device_detach, sf_detach), 211 DEVMETHOD(device_shutdown, sf_shutdown), 212 DEVMETHOD(device_suspend, sf_suspend), 213 DEVMETHOD(device_resume, sf_resume), 214 215 /* bus interface */ 216 DEVMETHOD(bus_print_child, bus_generic_print_child), 217 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 218 219 /* MII interface */ 220 DEVMETHOD(miibus_readreg, sf_miibus_readreg), 221 DEVMETHOD(miibus_writereg, sf_miibus_writereg), 222 DEVMETHOD(miibus_statchg, sf_miibus_statchg), 223 224 { NULL, NULL } 225 }; 226 227 static driver_t sf_driver = { 228 "sf", 229 sf_methods, 230 sizeof(struct sf_softc), 231 }; 232 233 static devclass_t sf_devclass; 234 235 DRIVER_MODULE(sf, pci, sf_driver, sf_devclass, 0, 0); 236 DRIVER_MODULE(miibus, sf, miibus_driver, miibus_devclass, 0, 0); 237 238 #define SF_SETBIT(sc, reg, x) \ 239 csr_write_4(sc, reg, csr_read_4(sc, reg) | (x)) 240 241 #define SF_CLRBIT(sc, reg, x) \ 242 csr_write_4(sc, reg, csr_read_4(sc, reg) & ~(x)) 243 244 static uint32_t 245 csr_read_4(struct sf_softc *sc, int reg) 246 { 247 uint32_t val; 248 249 if (sc->sf_restype == SYS_RES_MEMORY) 250 val = CSR_READ_4(sc, (reg + SF_RMAP_INTREG_BASE)); 251 else { 252 CSR_WRITE_4(sc, SF_INDIRECTIO_ADDR, reg + SF_RMAP_INTREG_BASE); 253 val = CSR_READ_4(sc, SF_INDIRECTIO_DATA); 254 } 255 256 return (val); 257 } 258 259 static uint8_t 260 sf_read_eeprom(struct sf_softc *sc, int reg) 261 { 262 uint8_t val; 263 264 val = (csr_read_4(sc, SF_EEADDR_BASE + 265 (reg & 0xFFFFFFFC)) >> (8 * (reg & 3))) & 0xFF; 266 267 return (val); 268 } 269 270 static void 271 csr_write_4(struct sf_softc *sc, int reg, uint32_t val) 272 { 273 274 if (sc->sf_restype == SYS_RES_MEMORY) 275 CSR_WRITE_4(sc, (reg + SF_RMAP_INTREG_BASE), val); 276 else { 277 CSR_WRITE_4(sc, SF_INDIRECTIO_ADDR, reg + SF_RMAP_INTREG_BASE); 278 CSR_WRITE_4(sc, SF_INDIRECTIO_DATA, val); 279 } 280 } 281 282 /* 283 * Copy the address 'mac' into the perfect RX filter entry at 284 * offset 'idx.' The perfect filter only has 16 entries so do 285 * some sanity tests. 286 */ 287 static int 288 sf_setperf(struct sf_softc *sc, int idx, uint8_t *mac) 289 { 290 291 if (idx < 0 || idx > SF_RXFILT_PERFECT_CNT) 292 return (EINVAL); 293 294 if (mac == NULL) 295 return (EINVAL); 296 297 csr_write_4(sc, SF_RXFILT_PERFECT_BASE + 298 (idx * SF_RXFILT_PERFECT_SKIP) + 0, mac[5] | (mac[4] << 8)); 299 csr_write_4(sc, SF_RXFILT_PERFECT_BASE + 300 (idx * SF_RXFILT_PERFECT_SKIP) + 4, mac[3] | (mac[2] << 8)); 301 csr_write_4(sc, SF_RXFILT_PERFECT_BASE + 302 (idx * SF_RXFILT_PERFECT_SKIP) + 8, mac[1] | (mac[0] << 8)); 303 304 return (0); 305 } 306 307 /* 308 * Set the bit in the 512-bit hash table that corresponds to the 309 * specified mac address 'mac.' If 'prio' is nonzero, update the 310 * priority hash table instead of the filter hash table. 311 */ 312 static int 313 sf_sethash(struct sf_softc *sc, caddr_t mac, int prio) 314 { 315 uint32_t h; 316 317 if (mac == NULL) 318 return (EINVAL); 319 320 h = ether_crc32_be(mac, ETHER_ADDR_LEN) >> 23; 321 322 if (prio) { 323 SF_SETBIT(sc, SF_RXFILT_HASH_BASE + SF_RXFILT_HASH_PRIOOFF + 324 (SF_RXFILT_HASH_SKIP * (h >> 4)), (1 << (h & 0xF))); 325 } else { 326 SF_SETBIT(sc, SF_RXFILT_HASH_BASE + SF_RXFILT_HASH_ADDROFF + 327 (SF_RXFILT_HASH_SKIP * (h >> 4)), (1 << (h & 0xF))); 328 } 329 330 return (0); 331 } 332 333 #ifdef notdef 334 /* 335 * Set a VLAN tag in the receive filter. 336 */ 337 static int 338 sf_setvlan(struct sf_softc *sc, int idx, uint32_t vlan) 339 { 340 341 if (idx < 0 || idx >> SF_RXFILT_HASH_CNT) 342 return (EINVAL); 343 344 csr_write_4(sc, SF_RXFILT_HASH_BASE + 345 (idx * SF_RXFILT_HASH_SKIP) + SF_RXFILT_HASH_VLANOFF, vlan); 346 347 return (0); 348 } 349 #endif 350 351 static int 352 sf_miibus_readreg(device_t dev, int phy, int reg) 353 { 354 struct sf_softc *sc; 355 int i; 356 uint32_t val = 0; 357 358 sc = device_get_softc(dev); 359 360 for (i = 0; i < SF_TIMEOUT; i++) { 361 val = csr_read_4(sc, SF_PHY_REG(phy, reg)); 362 if ((val & SF_MII_DATAVALID) != 0) 363 break; 364 } 365 366 if (i == SF_TIMEOUT) 367 return (0); 368 369 val &= SF_MII_DATAPORT; 370 if (val == 0xffff) 371 return (0); 372 373 return (val); 374 } 375 376 static int 377 sf_miibus_writereg(device_t dev, int phy, int reg, int val) 378 { 379 struct sf_softc *sc; 380 int i; 381 int busy; 382 383 sc = device_get_softc(dev); 384 385 csr_write_4(sc, SF_PHY_REG(phy, reg), val); 386 387 for (i = 0; i < SF_TIMEOUT; i++) { 388 busy = csr_read_4(sc, SF_PHY_REG(phy, reg)); 389 if ((busy & SF_MII_BUSY) == 0) 390 break; 391 } 392 393 return (0); 394 } 395 396 static void 397 sf_miibus_statchg(device_t dev) 398 { 399 struct sf_softc *sc; 400 401 sc = device_get_softc(dev); 402 taskqueue_enqueue(taskqueue_swi, &sc->sf_link_task); 403 } 404 405 static void 406 sf_link_task(void *arg, int pending) 407 { 408 struct sf_softc *sc; 409 struct mii_data *mii; 410 struct ifnet *ifp; 411 uint32_t val; 412 413 sc = (struct sf_softc *)arg; 414 415 SF_LOCK(sc); 416 417 mii = device_get_softc(sc->sf_miibus); 418 ifp = sc->sf_ifp; 419 if (mii == NULL || ifp == NULL || 420 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 421 SF_UNLOCK(sc); 422 return; 423 } 424 425 if (mii->mii_media_status & IFM_ACTIVE) { 426 if (IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) 427 sc->sf_link = 1; 428 } else 429 sc->sf_link = 0; 430 431 val = csr_read_4(sc, SF_MACCFG_1); 432 val &= ~SF_MACCFG1_FULLDUPLEX; 433 val &= ~(SF_MACCFG1_RX_FLOWENB | SF_MACCFG1_TX_FLOWENB); 434 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) { 435 val |= SF_MACCFG1_FULLDUPLEX; 436 csr_write_4(sc, SF_BKTOBKIPG, SF_IPGT_FDX); 437 #ifdef notyet 438 /* Configure flow-control bits. */ 439 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 440 IFM_ETH_RXPAUSE) != 0) 441 val |= SF_MACCFG1_RX_FLOWENB; 442 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 443 IFM_ETH_TXPAUSE) != 0) 444 val |= SF_MACCFG1_TX_FLOWENB; 445 #endif 446 } else 447 csr_write_4(sc, SF_BKTOBKIPG, SF_IPGT_HDX); 448 449 /* Make sure to reset MAC to take changes effect. */ 450 csr_write_4(sc, SF_MACCFG_1, val | SF_MACCFG1_SOFTRESET); 451 DELAY(1000); 452 csr_write_4(sc, SF_MACCFG_1, val); 453 454 val = csr_read_4(sc, SF_TIMER_CTL); 455 if (IFM_SUBTYPE(mii->mii_media_active) == IFM_100_TX) 456 val |= SF_TIMER_TIMES_TEN; 457 else 458 val &= ~SF_TIMER_TIMES_TEN; 459 csr_write_4(sc, SF_TIMER_CTL, val); 460 461 SF_UNLOCK(sc); 462 } 463 464 static void 465 sf_rxfilter(struct sf_softc *sc) 466 { 467 struct ifnet *ifp; 468 int i; 469 struct ifmultiaddr *ifma; 470 uint8_t dummy[ETHER_ADDR_LEN] = { 0, 0, 0, 0, 0, 0 }; 471 uint32_t rxfilt; 472 473 ifp = sc->sf_ifp; 474 475 /* First zot all the existing filters. */ 476 for (i = 1; i < SF_RXFILT_PERFECT_CNT; i++) 477 sf_setperf(sc, i, dummy); 478 for (i = SF_RXFILT_HASH_BASE; i < (SF_RXFILT_HASH_MAX + 1); 479 i += sizeof(uint32_t)) 480 csr_write_4(sc, i, 0); 481 482 rxfilt = csr_read_4(sc, SF_RXFILT); 483 rxfilt &= ~(SF_RXFILT_PROMISC | SF_RXFILT_ALLMULTI | SF_RXFILT_BROAD); 484 if ((ifp->if_flags & IFF_BROADCAST) != 0) 485 rxfilt |= SF_RXFILT_BROAD; 486 if ((ifp->if_flags & IFF_ALLMULTI) != 0 || 487 (ifp->if_flags & IFF_PROMISC) != 0) { 488 if ((ifp->if_flags & IFF_PROMISC) != 0) 489 rxfilt |= SF_RXFILT_PROMISC; 490 if ((ifp->if_flags & IFF_ALLMULTI) != 0) 491 rxfilt |= SF_RXFILT_ALLMULTI; 492 goto done; 493 } 494 495 /* Now program new ones. */ 496 i = 1; 497 if_maddr_rlock(ifp); 498 TAILQ_FOREACH_REVERSE(ifma, &ifp->if_multiaddrs, ifmultihead, 499 ifma_link) { 500 if (ifma->ifma_addr->sa_family != AF_LINK) 501 continue; 502 /* 503 * Program the first 15 multicast groups 504 * into the perfect filter. For all others, 505 * use the hash table. 506 */ 507 if (i < SF_RXFILT_PERFECT_CNT) { 508 sf_setperf(sc, i, 509 LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); 510 i++; 511 continue; 512 } 513 514 sf_sethash(sc, 515 LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 0); 516 } 517 if_maddr_runlock(ifp); 518 519 done: 520 csr_write_4(sc, SF_RXFILT, rxfilt); 521 } 522 523 /* 524 * Set media options. 525 */ 526 static int 527 sf_ifmedia_upd(struct ifnet *ifp) 528 { 529 struct sf_softc *sc; 530 struct mii_data *mii; 531 int error; 532 533 sc = ifp->if_softc; 534 SF_LOCK(sc); 535 536 mii = device_get_softc(sc->sf_miibus); 537 if (mii->mii_instance) { 538 struct mii_softc *miisc; 539 LIST_FOREACH(miisc, &mii->mii_phys, mii_list) 540 mii_phy_reset(miisc); 541 } 542 error = mii_mediachg(mii); 543 SF_UNLOCK(sc); 544 545 return (error); 546 } 547 548 /* 549 * Report current media status. 550 */ 551 static void 552 sf_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 553 { 554 struct sf_softc *sc; 555 struct mii_data *mii; 556 557 sc = ifp->if_softc; 558 SF_LOCK(sc); 559 mii = device_get_softc(sc->sf_miibus); 560 561 mii_pollstat(mii); 562 ifmr->ifm_active = mii->mii_media_active; 563 ifmr->ifm_status = mii->mii_media_status; 564 SF_UNLOCK(sc); 565 } 566 567 static int 568 sf_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 569 { 570 struct sf_softc *sc; 571 struct ifreq *ifr; 572 struct mii_data *mii; 573 int error, mask; 574 575 sc = ifp->if_softc; 576 ifr = (struct ifreq *)data; 577 error = 0; 578 579 switch (command) { 580 case SIOCSIFFLAGS: 581 SF_LOCK(sc); 582 if (ifp->if_flags & IFF_UP) { 583 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) { 584 if ((ifp->if_flags ^ sc->sf_if_flags) & 585 (IFF_PROMISC | IFF_ALLMULTI)) 586 sf_rxfilter(sc); 587 } else { 588 if (sc->sf_detach == 0) 589 sf_init_locked(sc); 590 } 591 } else { 592 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 593 sf_stop(sc); 594 } 595 sc->sf_if_flags = ifp->if_flags; 596 SF_UNLOCK(sc); 597 break; 598 case SIOCADDMULTI: 599 case SIOCDELMULTI: 600 SF_LOCK(sc); 601 sf_rxfilter(sc); 602 SF_UNLOCK(sc); 603 break; 604 case SIOCGIFMEDIA: 605 case SIOCSIFMEDIA: 606 mii = device_get_softc(sc->sf_miibus); 607 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); 608 break; 609 case SIOCSIFCAP: 610 mask = ifr->ifr_reqcap ^ ifp->if_capenable; 611 #ifdef DEVICE_POLLING 612 if ((mask & IFCAP_POLLING) != 0) { 613 if ((ifr->ifr_reqcap & IFCAP_POLLING) != 0) { 614 error = ether_poll_register(sf_poll, ifp); 615 if (error != 0) 616 break; 617 SF_LOCK(sc); 618 /* Disable interrupts. */ 619 csr_write_4(sc, SF_IMR, 0); 620 ifp->if_capenable |= IFCAP_POLLING; 621 SF_UNLOCK(sc); 622 } else { 623 error = ether_poll_deregister(ifp); 624 /* Enable interrupts. */ 625 SF_LOCK(sc); 626 csr_write_4(sc, SF_IMR, SF_INTRS); 627 ifp->if_capenable &= ~IFCAP_POLLING; 628 SF_UNLOCK(sc); 629 } 630 } 631 #endif /* DEVICE_POLLING */ 632 if ((mask & IFCAP_TXCSUM) != 0) { 633 if ((IFCAP_TXCSUM & ifp->if_capabilities) != 0) { 634 SF_LOCK(sc); 635 ifp->if_capenable ^= IFCAP_TXCSUM; 636 if ((IFCAP_TXCSUM & ifp->if_capenable) != 0) { 637 ifp->if_hwassist |= SF_CSUM_FEATURES; 638 SF_SETBIT(sc, SF_GEN_ETH_CTL, 639 SF_ETHCTL_TXGFP_ENB); 640 } else { 641 ifp->if_hwassist &= ~SF_CSUM_FEATURES; 642 SF_CLRBIT(sc, SF_GEN_ETH_CTL, 643 SF_ETHCTL_TXGFP_ENB); 644 } 645 SF_UNLOCK(sc); 646 } 647 } 648 if ((mask & IFCAP_RXCSUM) != 0) { 649 if ((IFCAP_RXCSUM & ifp->if_capabilities) != 0) { 650 SF_LOCK(sc); 651 ifp->if_capenable ^= IFCAP_RXCSUM; 652 if ((IFCAP_RXCSUM & ifp->if_capenable) != 0) 653 SF_SETBIT(sc, SF_GEN_ETH_CTL, 654 SF_ETHCTL_RXGFP_ENB); 655 else 656 SF_CLRBIT(sc, SF_GEN_ETH_CTL, 657 SF_ETHCTL_RXGFP_ENB); 658 SF_UNLOCK(sc); 659 } 660 } 661 break; 662 default: 663 error = ether_ioctl(ifp, command, data); 664 break; 665 } 666 667 return (error); 668 } 669 670 static void 671 sf_reset(struct sf_softc *sc) 672 { 673 int i; 674 675 csr_write_4(sc, SF_GEN_ETH_CTL, 0); 676 SF_SETBIT(sc, SF_MACCFG_1, SF_MACCFG1_SOFTRESET); 677 DELAY(1000); 678 SF_CLRBIT(sc, SF_MACCFG_1, SF_MACCFG1_SOFTRESET); 679 680 SF_SETBIT(sc, SF_PCI_DEVCFG, SF_PCIDEVCFG_RESET); 681 682 for (i = 0; i < SF_TIMEOUT; i++) { 683 DELAY(10); 684 if (!(csr_read_4(sc, SF_PCI_DEVCFG) & SF_PCIDEVCFG_RESET)) 685 break; 686 } 687 688 if (i == SF_TIMEOUT) 689 device_printf(sc->sf_dev, "reset never completed!\n"); 690 691 /* Wait a little while for the chip to get its brains in order. */ 692 DELAY(1000); 693 } 694 695 /* 696 * Probe for an Adaptec AIC-6915 chip. Check the PCI vendor and device 697 * IDs against our list and return a device name if we find a match. 698 * We also check the subsystem ID so that we can identify exactly which 699 * NIC has been found, if possible. 700 */ 701 static int 702 sf_probe(device_t dev) 703 { 704 struct sf_type *t; 705 uint16_t vid; 706 uint16_t did; 707 uint16_t sdid; 708 int i; 709 710 vid = pci_get_vendor(dev); 711 did = pci_get_device(dev); 712 sdid = pci_get_subdevice(dev); 713 714 t = sf_devs; 715 for (i = 0; i < sizeof(sf_devs) / sizeof(sf_devs[0]); i++, t++) { 716 if (vid == t->sf_vid && did == t->sf_did) { 717 if (sdid == t->sf_sdid) { 718 device_set_desc(dev, t->sf_sname); 719 return (BUS_PROBE_DEFAULT); 720 } 721 } 722 } 723 724 if (vid == AD_VENDORID && did == AD_DEVICEID_STARFIRE) { 725 /* unkown subdevice */ 726 device_set_desc(dev, sf_devs[0].sf_name); 727 return (BUS_PROBE_DEFAULT); 728 } 729 730 return (ENXIO); 731 } 732 733 /* 734 * Attach the interface. Allocate softc structures, do ifmedia 735 * setup and ethernet/BPF attach. 736 */ 737 static int 738 sf_attach(device_t dev) 739 { 740 int i; 741 struct sf_softc *sc; 742 struct ifnet *ifp; 743 uint32_t reg; 744 int rid, error = 0; 745 uint8_t eaddr[ETHER_ADDR_LEN]; 746 747 sc = device_get_softc(dev); 748 sc->sf_dev = dev; 749 750 mtx_init(&sc->sf_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 751 MTX_DEF); 752 callout_init_mtx(&sc->sf_co, &sc->sf_mtx, 0); 753 TASK_INIT(&sc->sf_link_task, 0, sf_link_task, sc); 754 755 /* 756 * Map control/status registers. 757 */ 758 pci_enable_busmaster(dev); 759 760 /* 761 * Prefer memory space register mapping over I/O space as the 762 * hardware requires lots of register access to get various 763 * producer/consumer index during Tx/Rx operation. However this 764 * requires large memory space(512K) to map the entire register 765 * space. 766 */ 767 sc->sf_rid = PCIR_BAR(0); 768 sc->sf_restype = SYS_RES_MEMORY; 769 sc->sf_res = bus_alloc_resource_any(dev, sc->sf_restype, &sc->sf_rid, 770 RF_ACTIVE); 771 if (sc->sf_res == NULL) { 772 reg = pci_read_config(dev, PCIR_BAR(0), 4); 773 if ((reg & PCIM_BAR_MEM_64) == PCIM_BAR_MEM_64) 774 sc->sf_rid = PCIR_BAR(2); 775 else 776 sc->sf_rid = PCIR_BAR(1); 777 sc->sf_restype = SYS_RES_IOPORT; 778 sc->sf_res = bus_alloc_resource_any(dev, sc->sf_restype, 779 &sc->sf_rid, RF_ACTIVE); 780 if (sc->sf_res == NULL) { 781 device_printf(dev, "couldn't allocate resources\n"); 782 mtx_destroy(&sc->sf_mtx); 783 return (ENXIO); 784 } 785 } 786 if (bootverbose) 787 device_printf(dev, "using %s space register mapping\n", 788 sc->sf_restype == SYS_RES_MEMORY ? "memory" : "I/O"); 789 790 reg = pci_read_config(dev, PCIR_CACHELNSZ, 1); 791 if (reg == 0) { 792 /* 793 * If cache line size is 0, MWI is not used at all, so set 794 * reasonable default. AIC-6915 supports 0, 4, 8, 16, 32 795 * and 64. 796 */ 797 reg = 16; 798 device_printf(dev, "setting PCI cache line size to %u\n", reg); 799 pci_write_config(dev, PCIR_CACHELNSZ, reg, 1); 800 } else { 801 if (bootverbose) 802 device_printf(dev, "PCI cache line size : %u\n", reg); 803 } 804 /* Enable MWI. */ 805 reg = pci_read_config(dev, PCIR_COMMAND, 2); 806 reg |= PCIM_CMD_MWRICEN; 807 pci_write_config(dev, PCIR_COMMAND, reg, 2); 808 809 /* Allocate interrupt. */ 810 rid = 0; 811 sc->sf_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 812 RF_SHAREABLE | RF_ACTIVE); 813 814 if (sc->sf_irq == NULL) { 815 device_printf(dev, "couldn't map interrupt\n"); 816 error = ENXIO; 817 goto fail; 818 } 819 820 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 821 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 822 OID_AUTO, "stats", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 823 sf_sysctl_stats, "I", "Statistics"); 824 825 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 826 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 827 OID_AUTO, "int_mod", CTLTYPE_INT | CTLFLAG_RW, 828 &sc->sf_int_mod, 0, sysctl_hw_sf_int_mod, "I", 829 "sf interrupt moderation"); 830 /* Pull in device tunables. */ 831 sc->sf_int_mod = SF_IM_DEFAULT; 832 error = resource_int_value(device_get_name(dev), device_get_unit(dev), 833 "int_mod", &sc->sf_int_mod); 834 if (error == 0) { 835 if (sc->sf_int_mod < SF_IM_MIN || 836 sc->sf_int_mod > SF_IM_MAX) { 837 device_printf(dev, "int_mod value out of range; " 838 "using default: %d\n", SF_IM_DEFAULT); 839 sc->sf_int_mod = SF_IM_DEFAULT; 840 } 841 } 842 843 /* Reset the adapter. */ 844 sf_reset(sc); 845 846 /* 847 * Get station address from the EEPROM. 848 */ 849 for (i = 0; i < ETHER_ADDR_LEN; i++) 850 eaddr[i] = 851 sf_read_eeprom(sc, SF_EE_NODEADDR + ETHER_ADDR_LEN - i); 852 853 /* Allocate DMA resources. */ 854 if (sf_dma_alloc(sc) != 0) { 855 error = ENOSPC; 856 goto fail; 857 } 858 859 sc->sf_txthresh = SF_MIN_TX_THRESHOLD; 860 861 ifp = sc->sf_ifp = if_alloc(IFT_ETHER); 862 if (ifp == NULL) { 863 device_printf(dev, "can not allocate ifnet structure\n"); 864 error = ENOSPC; 865 goto fail; 866 } 867 868 /* Do MII setup. */ 869 if (mii_phy_probe(dev, &sc->sf_miibus, sf_ifmedia_upd, 870 sf_ifmedia_sts)) { 871 device_printf(dev, "MII without any phy!\n"); 872 error = ENXIO; 873 goto fail; 874 } 875 876 ifp->if_softc = sc; 877 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 878 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 879 ifp->if_ioctl = sf_ioctl; 880 ifp->if_start = sf_start; 881 ifp->if_init = sf_init; 882 IFQ_SET_MAXLEN(&ifp->if_snd, SF_TX_DLIST_CNT - 1); 883 ifp->if_snd.ifq_drv_maxlen = SF_TX_DLIST_CNT - 1; 884 IFQ_SET_READY(&ifp->if_snd); 885 /* 886 * With the help of firmware, AIC-6915 supports 887 * Tx/Rx TCP/UDP checksum offload. 888 */ 889 ifp->if_hwassist = SF_CSUM_FEATURES; 890 ifp->if_capabilities = IFCAP_HWCSUM; 891 892 /* 893 * Call MI attach routine. 894 */ 895 ether_ifattach(ifp, eaddr); 896 897 /* VLAN capability setup. */ 898 ifp->if_capabilities |= IFCAP_VLAN_MTU; 899 ifp->if_capenable = ifp->if_capabilities; 900 #ifdef DEVICE_POLLING 901 ifp->if_capabilities |= IFCAP_POLLING; 902 #endif 903 /* 904 * Tell the upper layer(s) we support long frames. 905 * Must appear after the call to ether_ifattach() because 906 * ether_ifattach() sets ifi_hdrlen to the default value. 907 */ 908 ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header); 909 910 /* Hook interrupt last to avoid having to lock softc */ 911 error = bus_setup_intr(dev, sc->sf_irq, INTR_TYPE_NET | INTR_MPSAFE, 912 NULL, sf_intr, sc, &sc->sf_intrhand); 913 914 if (error) { 915 device_printf(dev, "couldn't set up irq\n"); 916 ether_ifdetach(ifp); 917 goto fail; 918 } 919 920 fail: 921 if (error) 922 sf_detach(dev); 923 924 return (error); 925 } 926 927 /* 928 * Shutdown hardware and free up resources. This can be called any 929 * time after the mutex has been initialized. It is called in both 930 * the error case in attach and the normal detach case so it needs 931 * to be careful about only freeing resources that have actually been 932 * allocated. 933 */ 934 static int 935 sf_detach(device_t dev) 936 { 937 struct sf_softc *sc; 938 struct ifnet *ifp; 939 940 sc = device_get_softc(dev); 941 ifp = sc->sf_ifp; 942 943 #ifdef DEVICE_POLLING 944 if (ifp != NULL && ifp->if_capenable & IFCAP_POLLING) 945 ether_poll_deregister(ifp); 946 #endif 947 948 /* These should only be active if attach succeeded */ 949 if (device_is_attached(dev)) { 950 SF_LOCK(sc); 951 sc->sf_detach = 1; 952 sf_stop(sc); 953 SF_UNLOCK(sc); 954 callout_drain(&sc->sf_co); 955 taskqueue_drain(taskqueue_swi, &sc->sf_link_task); 956 if (ifp != NULL) 957 ether_ifdetach(ifp); 958 } 959 if (sc->sf_miibus) { 960 device_delete_child(dev, sc->sf_miibus); 961 sc->sf_miibus = NULL; 962 } 963 bus_generic_detach(dev); 964 965 if (sc->sf_intrhand != NULL) 966 bus_teardown_intr(dev, sc->sf_irq, sc->sf_intrhand); 967 if (sc->sf_irq != NULL) 968 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sf_irq); 969 if (sc->sf_res != NULL) 970 bus_release_resource(dev, sc->sf_restype, sc->sf_rid, 971 sc->sf_res); 972 973 sf_dma_free(sc); 974 if (ifp != NULL) 975 if_free(ifp); 976 977 mtx_destroy(&sc->sf_mtx); 978 979 return (0); 980 } 981 982 struct sf_dmamap_arg { 983 bus_addr_t sf_busaddr; 984 }; 985 986 static void 987 sf_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 988 { 989 struct sf_dmamap_arg *ctx; 990 991 if (error != 0) 992 return; 993 ctx = arg; 994 ctx->sf_busaddr = segs[0].ds_addr; 995 } 996 997 static int 998 sf_dma_alloc(struct sf_softc *sc) 999 { 1000 struct sf_dmamap_arg ctx; 1001 struct sf_txdesc *txd; 1002 struct sf_rxdesc *rxd; 1003 bus_addr_t lowaddr; 1004 bus_addr_t rx_ring_end, rx_cring_end; 1005 bus_addr_t tx_ring_end, tx_cring_end; 1006 int error, i; 1007 1008 lowaddr = BUS_SPACE_MAXADDR; 1009 1010 again: 1011 /* Create parent DMA tag. */ 1012 error = bus_dma_tag_create( 1013 bus_get_dma_tag(sc->sf_dev), /* parent */ 1014 1, 0, /* alignment, boundary */ 1015 lowaddr, /* lowaddr */ 1016 BUS_SPACE_MAXADDR, /* highaddr */ 1017 NULL, NULL, /* filter, filterarg */ 1018 BUS_SPACE_MAXSIZE_32BIT, /* maxsize */ 1019 0, /* nsegments */ 1020 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */ 1021 0, /* flags */ 1022 NULL, NULL, /* lockfunc, lockarg */ 1023 &sc->sf_cdata.sf_parent_tag); 1024 if (error != 0) { 1025 device_printf(sc->sf_dev, "failed to create parent DMA tag\n"); 1026 goto fail; 1027 } 1028 /* Create tag for Tx ring. */ 1029 error = bus_dma_tag_create(sc->sf_cdata.sf_parent_tag,/* parent */ 1030 SF_RING_ALIGN, 0, /* alignment, boundary */ 1031 BUS_SPACE_MAXADDR, /* lowaddr */ 1032 BUS_SPACE_MAXADDR, /* highaddr */ 1033 NULL, NULL, /* filter, filterarg */ 1034 SF_TX_DLIST_SIZE, /* maxsize */ 1035 1, /* nsegments */ 1036 SF_TX_DLIST_SIZE, /* maxsegsize */ 1037 0, /* flags */ 1038 NULL, NULL, /* lockfunc, lockarg */ 1039 &sc->sf_cdata.sf_tx_ring_tag); 1040 if (error != 0) { 1041 device_printf(sc->sf_dev, "failed to create Tx ring DMA tag\n"); 1042 goto fail; 1043 } 1044 1045 /* Create tag for Tx completion ring. */ 1046 error = bus_dma_tag_create(sc->sf_cdata.sf_parent_tag,/* parent */ 1047 SF_RING_ALIGN, 0, /* alignment, boundary */ 1048 BUS_SPACE_MAXADDR, /* lowaddr */ 1049 BUS_SPACE_MAXADDR, /* highaddr */ 1050 NULL, NULL, /* filter, filterarg */ 1051 SF_TX_CLIST_SIZE, /* maxsize */ 1052 1, /* nsegments */ 1053 SF_TX_CLIST_SIZE, /* maxsegsize */ 1054 0, /* flags */ 1055 NULL, NULL, /* lockfunc, lockarg */ 1056 &sc->sf_cdata.sf_tx_cring_tag); 1057 if (error != 0) { 1058 device_printf(sc->sf_dev, 1059 "failed to create Tx completion ring DMA tag\n"); 1060 goto fail; 1061 } 1062 1063 /* Create tag for Rx ring. */ 1064 error = bus_dma_tag_create(sc->sf_cdata.sf_parent_tag,/* parent */ 1065 SF_RING_ALIGN, 0, /* alignment, boundary */ 1066 BUS_SPACE_MAXADDR, /* lowaddr */ 1067 BUS_SPACE_MAXADDR, /* highaddr */ 1068 NULL, NULL, /* filter, filterarg */ 1069 SF_RX_DLIST_SIZE, /* maxsize */ 1070 1, /* nsegments */ 1071 SF_RX_DLIST_SIZE, /* maxsegsize */ 1072 0, /* flags */ 1073 NULL, NULL, /* lockfunc, lockarg */ 1074 &sc->sf_cdata.sf_rx_ring_tag); 1075 if (error != 0) { 1076 device_printf(sc->sf_dev, 1077 "failed to create Rx ring DMA tag\n"); 1078 goto fail; 1079 } 1080 1081 /* Create tag for Rx completion ring. */ 1082 error = bus_dma_tag_create(sc->sf_cdata.sf_parent_tag,/* parent */ 1083 SF_RING_ALIGN, 0, /* alignment, boundary */ 1084 BUS_SPACE_MAXADDR, /* lowaddr */ 1085 BUS_SPACE_MAXADDR, /* highaddr */ 1086 NULL, NULL, /* filter, filterarg */ 1087 SF_RX_CLIST_SIZE, /* maxsize */ 1088 1, /* nsegments */ 1089 SF_RX_CLIST_SIZE, /* maxsegsize */ 1090 0, /* flags */ 1091 NULL, NULL, /* lockfunc, lockarg */ 1092 &sc->sf_cdata.sf_rx_cring_tag); 1093 if (error != 0) { 1094 device_printf(sc->sf_dev, 1095 "failed to create Rx completion ring DMA tag\n"); 1096 goto fail; 1097 } 1098 1099 /* Create tag for Tx buffers. */ 1100 error = bus_dma_tag_create(sc->sf_cdata.sf_parent_tag,/* parent */ 1101 1, 0, /* alignment, boundary */ 1102 BUS_SPACE_MAXADDR, /* lowaddr */ 1103 BUS_SPACE_MAXADDR, /* highaddr */ 1104 NULL, NULL, /* filter, filterarg */ 1105 MCLBYTES * SF_MAXTXSEGS, /* maxsize */ 1106 SF_MAXTXSEGS, /* nsegments */ 1107 MCLBYTES, /* maxsegsize */ 1108 0, /* flags */ 1109 NULL, NULL, /* lockfunc, lockarg */ 1110 &sc->sf_cdata.sf_tx_tag); 1111 if (error != 0) { 1112 device_printf(sc->sf_dev, "failed to create Tx DMA tag\n"); 1113 goto fail; 1114 } 1115 1116 /* Create tag for Rx buffers. */ 1117 error = bus_dma_tag_create(sc->sf_cdata.sf_parent_tag,/* parent */ 1118 SF_RX_ALIGN, 0, /* alignment, boundary */ 1119 BUS_SPACE_MAXADDR, /* lowaddr */ 1120 BUS_SPACE_MAXADDR, /* highaddr */ 1121 NULL, NULL, /* filter, filterarg */ 1122 MCLBYTES, /* maxsize */ 1123 1, /* nsegments */ 1124 MCLBYTES, /* maxsegsize */ 1125 0, /* flags */ 1126 NULL, NULL, /* lockfunc, lockarg */ 1127 &sc->sf_cdata.sf_rx_tag); 1128 if (error != 0) { 1129 device_printf(sc->sf_dev, "failed to create Rx DMA tag\n"); 1130 goto fail; 1131 } 1132 1133 /* Allocate DMA'able memory and load the DMA map for Tx ring. */ 1134 error = bus_dmamem_alloc(sc->sf_cdata.sf_tx_ring_tag, 1135 (void **)&sc->sf_rdata.sf_tx_ring, BUS_DMA_WAITOK | 1136 BUS_DMA_COHERENT | BUS_DMA_ZERO, &sc->sf_cdata.sf_tx_ring_map); 1137 if (error != 0) { 1138 device_printf(sc->sf_dev, 1139 "failed to allocate DMA'able memory for Tx ring\n"); 1140 goto fail; 1141 } 1142 1143 ctx.sf_busaddr = 0; 1144 error = bus_dmamap_load(sc->sf_cdata.sf_tx_ring_tag, 1145 sc->sf_cdata.sf_tx_ring_map, sc->sf_rdata.sf_tx_ring, 1146 SF_TX_DLIST_SIZE, sf_dmamap_cb, &ctx, 0); 1147 if (error != 0 || ctx.sf_busaddr == 0) { 1148 device_printf(sc->sf_dev, 1149 "failed to load DMA'able memory for Tx ring\n"); 1150 goto fail; 1151 } 1152 sc->sf_rdata.sf_tx_ring_paddr = ctx.sf_busaddr; 1153 1154 /* 1155 * Allocate DMA'able memory and load the DMA map for Tx completion ring. 1156 */ 1157 error = bus_dmamem_alloc(sc->sf_cdata.sf_tx_cring_tag, 1158 (void **)&sc->sf_rdata.sf_tx_cring, BUS_DMA_WAITOK | 1159 BUS_DMA_COHERENT | BUS_DMA_ZERO, &sc->sf_cdata.sf_tx_cring_map); 1160 if (error != 0) { 1161 device_printf(sc->sf_dev, 1162 "failed to allocate DMA'able memory for " 1163 "Tx completion ring\n"); 1164 goto fail; 1165 } 1166 1167 ctx.sf_busaddr = 0; 1168 error = bus_dmamap_load(sc->sf_cdata.sf_tx_cring_tag, 1169 sc->sf_cdata.sf_tx_cring_map, sc->sf_rdata.sf_tx_cring, 1170 SF_TX_CLIST_SIZE, sf_dmamap_cb, &ctx, 0); 1171 if (error != 0 || ctx.sf_busaddr == 0) { 1172 device_printf(sc->sf_dev, 1173 "failed to load DMA'able memory for Tx completion ring\n"); 1174 goto fail; 1175 } 1176 sc->sf_rdata.sf_tx_cring_paddr = ctx.sf_busaddr; 1177 1178 /* Allocate DMA'able memory and load the DMA map for Rx ring. */ 1179 error = bus_dmamem_alloc(sc->sf_cdata.sf_rx_ring_tag, 1180 (void **)&sc->sf_rdata.sf_rx_ring, BUS_DMA_WAITOK | 1181 BUS_DMA_COHERENT | BUS_DMA_ZERO, &sc->sf_cdata.sf_rx_ring_map); 1182 if (error != 0) { 1183 device_printf(sc->sf_dev, 1184 "failed to allocate DMA'able memory for Rx ring\n"); 1185 goto fail; 1186 } 1187 1188 ctx.sf_busaddr = 0; 1189 error = bus_dmamap_load(sc->sf_cdata.sf_rx_ring_tag, 1190 sc->sf_cdata.sf_rx_ring_map, sc->sf_rdata.sf_rx_ring, 1191 SF_RX_DLIST_SIZE, sf_dmamap_cb, &ctx, 0); 1192 if (error != 0 || ctx.sf_busaddr == 0) { 1193 device_printf(sc->sf_dev, 1194 "failed to load DMA'able memory for Rx ring\n"); 1195 goto fail; 1196 } 1197 sc->sf_rdata.sf_rx_ring_paddr = ctx.sf_busaddr; 1198 1199 /* 1200 * Allocate DMA'able memory and load the DMA map for Rx completion ring. 1201 */ 1202 error = bus_dmamem_alloc(sc->sf_cdata.sf_rx_cring_tag, 1203 (void **)&sc->sf_rdata.sf_rx_cring, BUS_DMA_WAITOK | 1204 BUS_DMA_COHERENT | BUS_DMA_ZERO, &sc->sf_cdata.sf_rx_cring_map); 1205 if (error != 0) { 1206 device_printf(sc->sf_dev, 1207 "failed to allocate DMA'able memory for " 1208 "Rx completion ring\n"); 1209 goto fail; 1210 } 1211 1212 ctx.sf_busaddr = 0; 1213 error = bus_dmamap_load(sc->sf_cdata.sf_rx_cring_tag, 1214 sc->sf_cdata.sf_rx_cring_map, sc->sf_rdata.sf_rx_cring, 1215 SF_RX_CLIST_SIZE, sf_dmamap_cb, &ctx, 0); 1216 if (error != 0 || ctx.sf_busaddr == 0) { 1217 device_printf(sc->sf_dev, 1218 "failed to load DMA'able memory for Rx completion ring\n"); 1219 goto fail; 1220 } 1221 sc->sf_rdata.sf_rx_cring_paddr = ctx.sf_busaddr; 1222 1223 /* 1224 * Tx desciptor ring and Tx completion ring should be addressed in 1225 * the same 4GB space. The same rule applys to Rx ring and Rx 1226 * completion ring. Unfortunately there is no way to specify this 1227 * boundary restriction with bus_dma(9). So just try to allocate 1228 * without the restriction and check the restriction was satisfied. 1229 * If not, fall back to 32bit dma addressing mode which always 1230 * guarantees the restriction. 1231 */ 1232 tx_ring_end = sc->sf_rdata.sf_tx_ring_paddr + SF_TX_DLIST_SIZE; 1233 tx_cring_end = sc->sf_rdata.sf_tx_cring_paddr + SF_TX_CLIST_SIZE; 1234 rx_ring_end = sc->sf_rdata.sf_rx_ring_paddr + SF_RX_DLIST_SIZE; 1235 rx_cring_end = sc->sf_rdata.sf_rx_cring_paddr + SF_RX_CLIST_SIZE; 1236 if ((SF_ADDR_HI(sc->sf_rdata.sf_tx_ring_paddr) != 1237 SF_ADDR_HI(tx_cring_end)) || 1238 (SF_ADDR_HI(sc->sf_rdata.sf_tx_cring_paddr) != 1239 SF_ADDR_HI(tx_ring_end)) || 1240 (SF_ADDR_HI(sc->sf_rdata.sf_rx_ring_paddr) != 1241 SF_ADDR_HI(rx_cring_end)) || 1242 (SF_ADDR_HI(sc->sf_rdata.sf_rx_cring_paddr) != 1243 SF_ADDR_HI(rx_ring_end))) { 1244 device_printf(sc->sf_dev, 1245 "switching to 32bit DMA mode\n"); 1246 sf_dma_free(sc); 1247 /* Limit DMA address space to 32bit and try again. */ 1248 lowaddr = BUS_SPACE_MAXADDR_32BIT; 1249 goto again; 1250 } 1251 1252 /* Create DMA maps for Tx buffers. */ 1253 for (i = 0; i < SF_TX_DLIST_CNT; i++) { 1254 txd = &sc->sf_cdata.sf_txdesc[i]; 1255 txd->tx_m = NULL; 1256 txd->ndesc = 0; 1257 txd->tx_dmamap = NULL; 1258 error = bus_dmamap_create(sc->sf_cdata.sf_tx_tag, 0, 1259 &txd->tx_dmamap); 1260 if (error != 0) { 1261 device_printf(sc->sf_dev, 1262 "failed to create Tx dmamap\n"); 1263 goto fail; 1264 } 1265 } 1266 /* Create DMA maps for Rx buffers. */ 1267 if ((error = bus_dmamap_create(sc->sf_cdata.sf_rx_tag, 0, 1268 &sc->sf_cdata.sf_rx_sparemap)) != 0) { 1269 device_printf(sc->sf_dev, 1270 "failed to create spare Rx dmamap\n"); 1271 goto fail; 1272 } 1273 for (i = 0; i < SF_RX_DLIST_CNT; i++) { 1274 rxd = &sc->sf_cdata.sf_rxdesc[i]; 1275 rxd->rx_m = NULL; 1276 rxd->rx_dmamap = NULL; 1277 error = bus_dmamap_create(sc->sf_cdata.sf_rx_tag, 0, 1278 &rxd->rx_dmamap); 1279 if (error != 0) { 1280 device_printf(sc->sf_dev, 1281 "failed to create Rx dmamap\n"); 1282 goto fail; 1283 } 1284 } 1285 1286 fail: 1287 return (error); 1288 } 1289 1290 static void 1291 sf_dma_free(struct sf_softc *sc) 1292 { 1293 struct sf_txdesc *txd; 1294 struct sf_rxdesc *rxd; 1295 int i; 1296 1297 /* Tx ring. */ 1298 if (sc->sf_cdata.sf_tx_ring_tag) { 1299 if (sc->sf_cdata.sf_tx_ring_map) 1300 bus_dmamap_unload(sc->sf_cdata.sf_tx_ring_tag, 1301 sc->sf_cdata.sf_tx_ring_map); 1302 if (sc->sf_cdata.sf_tx_ring_map && 1303 sc->sf_rdata.sf_tx_ring) 1304 bus_dmamem_free(sc->sf_cdata.sf_tx_ring_tag, 1305 sc->sf_rdata.sf_tx_ring, 1306 sc->sf_cdata.sf_tx_ring_map); 1307 sc->sf_rdata.sf_tx_ring = NULL; 1308 sc->sf_cdata.sf_tx_ring_map = NULL; 1309 bus_dma_tag_destroy(sc->sf_cdata.sf_tx_ring_tag); 1310 sc->sf_cdata.sf_tx_ring_tag = NULL; 1311 } 1312 /* Tx completion ring. */ 1313 if (sc->sf_cdata.sf_tx_cring_tag) { 1314 if (sc->sf_cdata.sf_tx_cring_map) 1315 bus_dmamap_unload(sc->sf_cdata.sf_tx_cring_tag, 1316 sc->sf_cdata.sf_tx_cring_map); 1317 if (sc->sf_cdata.sf_tx_cring_map && 1318 sc->sf_rdata.sf_tx_cring) 1319 bus_dmamem_free(sc->sf_cdata.sf_tx_cring_tag, 1320 sc->sf_rdata.sf_tx_cring, 1321 sc->sf_cdata.sf_tx_cring_map); 1322 sc->sf_rdata.sf_tx_cring = NULL; 1323 sc->sf_cdata.sf_tx_cring_map = NULL; 1324 bus_dma_tag_destroy(sc->sf_cdata.sf_tx_cring_tag); 1325 sc->sf_cdata.sf_tx_cring_tag = NULL; 1326 } 1327 /* Rx ring. */ 1328 if (sc->sf_cdata.sf_rx_ring_tag) { 1329 if (sc->sf_cdata.sf_rx_ring_map) 1330 bus_dmamap_unload(sc->sf_cdata.sf_rx_ring_tag, 1331 sc->sf_cdata.sf_rx_ring_map); 1332 if (sc->sf_cdata.sf_rx_ring_map && 1333 sc->sf_rdata.sf_rx_ring) 1334 bus_dmamem_free(sc->sf_cdata.sf_rx_ring_tag, 1335 sc->sf_rdata.sf_rx_ring, 1336 sc->sf_cdata.sf_rx_ring_map); 1337 sc->sf_rdata.sf_rx_ring = NULL; 1338 sc->sf_cdata.sf_rx_ring_map = NULL; 1339 bus_dma_tag_destroy(sc->sf_cdata.sf_rx_ring_tag); 1340 sc->sf_cdata.sf_rx_ring_tag = NULL; 1341 } 1342 /* Rx completion ring. */ 1343 if (sc->sf_cdata.sf_rx_cring_tag) { 1344 if (sc->sf_cdata.sf_rx_cring_map) 1345 bus_dmamap_unload(sc->sf_cdata.sf_rx_cring_tag, 1346 sc->sf_cdata.sf_rx_cring_map); 1347 if (sc->sf_cdata.sf_rx_cring_map && 1348 sc->sf_rdata.sf_rx_cring) 1349 bus_dmamem_free(sc->sf_cdata.sf_rx_cring_tag, 1350 sc->sf_rdata.sf_rx_cring, 1351 sc->sf_cdata.sf_rx_cring_map); 1352 sc->sf_rdata.sf_rx_cring = NULL; 1353 sc->sf_cdata.sf_rx_cring_map = NULL; 1354 bus_dma_tag_destroy(sc->sf_cdata.sf_rx_cring_tag); 1355 sc->sf_cdata.sf_rx_cring_tag = NULL; 1356 } 1357 /* Tx buffers. */ 1358 if (sc->sf_cdata.sf_tx_tag) { 1359 for (i = 0; i < SF_TX_DLIST_CNT; i++) { 1360 txd = &sc->sf_cdata.sf_txdesc[i]; 1361 if (txd->tx_dmamap) { 1362 bus_dmamap_destroy(sc->sf_cdata.sf_tx_tag, 1363 txd->tx_dmamap); 1364 txd->tx_dmamap = NULL; 1365 } 1366 } 1367 bus_dma_tag_destroy(sc->sf_cdata.sf_tx_tag); 1368 sc->sf_cdata.sf_tx_tag = NULL; 1369 } 1370 /* Rx buffers. */ 1371 if (sc->sf_cdata.sf_rx_tag) { 1372 for (i = 0; i < SF_RX_DLIST_CNT; i++) { 1373 rxd = &sc->sf_cdata.sf_rxdesc[i]; 1374 if (rxd->rx_dmamap) { 1375 bus_dmamap_destroy(sc->sf_cdata.sf_rx_tag, 1376 rxd->rx_dmamap); 1377 rxd->rx_dmamap = NULL; 1378 } 1379 } 1380 if (sc->sf_cdata.sf_rx_sparemap) { 1381 bus_dmamap_destroy(sc->sf_cdata.sf_rx_tag, 1382 sc->sf_cdata.sf_rx_sparemap); 1383 sc->sf_cdata.sf_rx_sparemap = 0; 1384 } 1385 bus_dma_tag_destroy(sc->sf_cdata.sf_rx_tag); 1386 sc->sf_cdata.sf_rx_tag = NULL; 1387 } 1388 1389 if (sc->sf_cdata.sf_parent_tag) { 1390 bus_dma_tag_destroy(sc->sf_cdata.sf_parent_tag); 1391 sc->sf_cdata.sf_parent_tag = NULL; 1392 } 1393 } 1394 1395 static int 1396 sf_init_rx_ring(struct sf_softc *sc) 1397 { 1398 struct sf_ring_data *rd; 1399 int i; 1400 1401 sc->sf_cdata.sf_rxc_cons = 0; 1402 1403 rd = &sc->sf_rdata; 1404 bzero(rd->sf_rx_ring, SF_RX_DLIST_SIZE); 1405 bzero(rd->sf_rx_cring, SF_RX_CLIST_SIZE); 1406 1407 for (i = 0; i < SF_RX_DLIST_CNT; i++) { 1408 if (sf_newbuf(sc, i) != 0) 1409 return (ENOBUFS); 1410 } 1411 1412 bus_dmamap_sync(sc->sf_cdata.sf_rx_cring_tag, 1413 sc->sf_cdata.sf_rx_cring_map, 1414 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1415 bus_dmamap_sync(sc->sf_cdata.sf_rx_ring_tag, 1416 sc->sf_cdata.sf_rx_ring_map, 1417 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1418 1419 return (0); 1420 } 1421 1422 static void 1423 sf_init_tx_ring(struct sf_softc *sc) 1424 { 1425 struct sf_ring_data *rd; 1426 int i; 1427 1428 sc->sf_cdata.sf_tx_prod = 0; 1429 sc->sf_cdata.sf_tx_cnt = 0; 1430 sc->sf_cdata.sf_txc_cons = 0; 1431 1432 rd = &sc->sf_rdata; 1433 bzero(rd->sf_tx_ring, SF_TX_DLIST_SIZE); 1434 bzero(rd->sf_tx_cring, SF_TX_CLIST_SIZE); 1435 for (i = 0; i < SF_TX_DLIST_CNT; i++) { 1436 rd->sf_tx_ring[i].sf_tx_ctrl = htole32(SF_TX_DESC_ID); 1437 sc->sf_cdata.sf_txdesc[i].tx_m = NULL; 1438 sc->sf_cdata.sf_txdesc[i].ndesc = 0; 1439 } 1440 rd->sf_tx_ring[i].sf_tx_ctrl |= htole32(SF_TX_DESC_END); 1441 1442 bus_dmamap_sync(sc->sf_cdata.sf_tx_ring_tag, 1443 sc->sf_cdata.sf_tx_ring_map, 1444 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1445 bus_dmamap_sync(sc->sf_cdata.sf_tx_cring_tag, 1446 sc->sf_cdata.sf_tx_cring_map, 1447 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1448 } 1449 1450 /* 1451 * Initialize an RX descriptor and attach an MBUF cluster. 1452 */ 1453 static int 1454 sf_newbuf(struct sf_softc *sc, int idx) 1455 { 1456 struct sf_rx_rdesc *desc; 1457 struct sf_rxdesc *rxd; 1458 struct mbuf *m; 1459 bus_dma_segment_t segs[1]; 1460 bus_dmamap_t map; 1461 int nsegs; 1462 1463 m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1464 if (m == NULL) 1465 return (ENOBUFS); 1466 m->m_len = m->m_pkthdr.len = MCLBYTES; 1467 m_adj(m, sizeof(uint32_t)); 1468 1469 if (bus_dmamap_load_mbuf_sg(sc->sf_cdata.sf_rx_tag, 1470 sc->sf_cdata.sf_rx_sparemap, m, segs, &nsegs, 0) != 0) { 1471 m_freem(m); 1472 return (ENOBUFS); 1473 } 1474 KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs)); 1475 1476 rxd = &sc->sf_cdata.sf_rxdesc[idx]; 1477 if (rxd->rx_m != NULL) { 1478 bus_dmamap_sync(sc->sf_cdata.sf_rx_tag, rxd->rx_dmamap, 1479 BUS_DMASYNC_POSTREAD); 1480 bus_dmamap_unload(sc->sf_cdata.sf_rx_tag, rxd->rx_dmamap); 1481 } 1482 map = rxd->rx_dmamap; 1483 rxd->rx_dmamap = sc->sf_cdata.sf_rx_sparemap; 1484 sc->sf_cdata.sf_rx_sparemap = map; 1485 bus_dmamap_sync(sc->sf_cdata.sf_rx_tag, rxd->rx_dmamap, 1486 BUS_DMASYNC_PREREAD); 1487 rxd->rx_m = m; 1488 desc = &sc->sf_rdata.sf_rx_ring[idx]; 1489 desc->sf_addr = htole64(segs[0].ds_addr); 1490 1491 return (0); 1492 } 1493 1494 #ifndef __NO_STRICT_ALIGNMENT 1495 static __inline void 1496 sf_fixup_rx(struct mbuf *m) 1497 { 1498 int i; 1499 uint16_t *src, *dst; 1500 1501 src = mtod(m, uint16_t *); 1502 dst = src - 1; 1503 1504 for (i = 0; i < (m->m_len / sizeof(uint16_t) + 1); i++) 1505 *dst++ = *src++; 1506 1507 m->m_data -= ETHER_ALIGN; 1508 } 1509 #endif 1510 1511 /* 1512 * The starfire is programmed to use 'normal' mode for packet reception, 1513 * which means we use the consumer/producer model for both the buffer 1514 * descriptor queue and the completion descriptor queue. The only problem 1515 * with this is that it involves a lot of register accesses: we have to 1516 * read the RX completion consumer and producer indexes and the RX buffer 1517 * producer index, plus the RX completion consumer and RX buffer producer 1518 * indexes have to be updated. It would have been easier if Adaptec had 1519 * put each index in a separate register, especially given that the damn 1520 * NIC has a 512K register space. 1521 * 1522 * In spite of all the lovely features that Adaptec crammed into the 6915, 1523 * it is marred by one truly stupid design flaw, which is that receive 1524 * buffer addresses must be aligned on a longword boundary. This forces 1525 * the packet payload to be unaligned, which is suboptimal on the x86 and 1526 * completely unuseable on the Alpha. Our only recourse is to copy received 1527 * packets into properly aligned buffers before handing them off. 1528 */ 1529 static int 1530 sf_rxeof(struct sf_softc *sc) 1531 { 1532 struct mbuf *m; 1533 struct ifnet *ifp; 1534 struct sf_rxdesc *rxd; 1535 struct sf_rx_rcdesc *cur_cmp; 1536 int cons, eidx, prog, rx_npkts; 1537 uint32_t status, status2; 1538 1539 SF_LOCK_ASSERT(sc); 1540 1541 ifp = sc->sf_ifp; 1542 rx_npkts = 0; 1543 1544 bus_dmamap_sync(sc->sf_cdata.sf_rx_ring_tag, 1545 sc->sf_cdata.sf_rx_ring_map, 1546 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1547 bus_dmamap_sync(sc->sf_cdata.sf_rx_cring_tag, 1548 sc->sf_cdata.sf_rx_cring_map, 1549 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1550 1551 /* 1552 * To reduce register access, directly read Receive completion 1553 * queue entry. 1554 */ 1555 eidx = 0; 1556 prog = 0; 1557 for (cons = sc->sf_cdata.sf_rxc_cons; ; SF_INC(cons, SF_RX_CLIST_CNT)) { 1558 cur_cmp = &sc->sf_rdata.sf_rx_cring[cons]; 1559 status = le32toh(cur_cmp->sf_rx_status1); 1560 if (status == 0) 1561 break; 1562 #ifdef DEVICE_POLLING 1563 if ((ifp->if_capenable & IFCAP_POLLING) != 0) { 1564 if (sc->rxcycles <= 0) 1565 break; 1566 sc->rxcycles--; 1567 } 1568 #endif 1569 prog++; 1570 eidx = (status & SF_RX_CMPDESC_EIDX) >> 16; 1571 rxd = &sc->sf_cdata.sf_rxdesc[eidx]; 1572 m = rxd->rx_m; 1573 1574 /* 1575 * Note, if_ipackets and if_ierrors counters 1576 * are handled in sf_stats_update(). 1577 */ 1578 if ((status & SF_RXSTAT1_OK) == 0) { 1579 cur_cmp->sf_rx_status1 = 0; 1580 continue; 1581 } 1582 1583 if (sf_newbuf(sc, eidx) != 0) { 1584 ifp->if_iqdrops++; 1585 cur_cmp->sf_rx_status1 = 0; 1586 continue; 1587 } 1588 1589 /* AIC-6915 supports TCP/UDP checksum offload. */ 1590 if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) { 1591 status2 = le32toh(cur_cmp->sf_rx_status2); 1592 /* 1593 * Sometimes AIC-6915 generates an interrupt to 1594 * warn RxGFP stall with bad checksum bit set 1595 * in status word. I'm not sure what conditioan 1596 * triggers it but recevied packet's checksum 1597 * was correct even though AIC-6915 does not 1598 * agree on this. This may be an indication of 1599 * firmware bug. To fix the issue, do not rely 1600 * on bad checksum bit in status word and let 1601 * upper layer verify integrity of received 1602 * frame. 1603 * Another nice feature of AIC-6915 is hardware 1604 * assistance of checksum calculation by 1605 * providing partial checksum value for received 1606 * frame. The partial checksum value can be used 1607 * to accelerate checksum computation for 1608 * fragmented TCP/UDP packets. Upper network 1609 * stack already takes advantage of the partial 1610 * checksum value in IP reassembly stage. But 1611 * I'm not sure the correctness of the partial 1612 * hardware checksum assistance as frequent 1613 * RxGFP stalls are seen on non-fragmented 1614 * frames. Due to the nature of the complexity 1615 * of checksum computation code in firmware it's 1616 * possible to see another bug in RxGFP so 1617 * ignore checksum assistance for fragmented 1618 * frames. This can be changed in future. 1619 */ 1620 if ((status2 & SF_RXSTAT2_FRAG) == 0) { 1621 if ((status2 & (SF_RXSTAT2_TCP | 1622 SF_RXSTAT2_UDP)) != 0) { 1623 if ((status2 & SF_RXSTAT2_CSUM_OK)) { 1624 m->m_pkthdr.csum_flags = 1625 CSUM_DATA_VALID | 1626 CSUM_PSEUDO_HDR; 1627 m->m_pkthdr.csum_data = 0xffff; 1628 } 1629 } 1630 } 1631 #ifdef SF_PARTIAL_CSUM_SUPPORT 1632 else if ((status2 & SF_RXSTAT2_FRAG) != 0) { 1633 if ((status2 & (SF_RXSTAT2_TCP | 1634 SF_RXSTAT2_UDP)) != 0) { 1635 if ((status2 & SF_RXSTAT2_PCSUM_OK)) { 1636 m->m_pkthdr.csum_flags = 1637 CSUM_DATA_VALID; 1638 m->m_pkthdr.csum_data = 1639 (status & 1640 SF_RX_CMPDESC_CSUM2); 1641 } 1642 } 1643 } 1644 #endif 1645 } 1646 1647 m->m_pkthdr.len = m->m_len = status & SF_RX_CMPDESC_LEN; 1648 #ifndef __NO_STRICT_ALIGNMENT 1649 sf_fixup_rx(m); 1650 #endif 1651 m->m_pkthdr.rcvif = ifp; 1652 1653 SF_UNLOCK(sc); 1654 (*ifp->if_input)(ifp, m); 1655 SF_LOCK(sc); 1656 rx_npkts++; 1657 1658 /* Clear completion status. */ 1659 cur_cmp->sf_rx_status1 = 0; 1660 } 1661 1662 if (prog > 0) { 1663 sc->sf_cdata.sf_rxc_cons = cons; 1664 bus_dmamap_sync(sc->sf_cdata.sf_rx_ring_tag, 1665 sc->sf_cdata.sf_rx_ring_map, 1666 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1667 bus_dmamap_sync(sc->sf_cdata.sf_rx_cring_tag, 1668 sc->sf_cdata.sf_rx_cring_map, 1669 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1670 1671 /* Update Rx completion Q1 consumer index. */ 1672 csr_write_4(sc, SF_CQ_CONSIDX, 1673 (csr_read_4(sc, SF_CQ_CONSIDX) & ~SF_CQ_CONSIDX_RXQ1) | 1674 (cons & SF_CQ_CONSIDX_RXQ1)); 1675 /* Update Rx descriptor Q1 ptr. */ 1676 csr_write_4(sc, SF_RXDQ_PTR_Q1, 1677 (csr_read_4(sc, SF_RXDQ_PTR_Q1) & ~SF_RXDQ_PRODIDX) | 1678 (eidx & SF_RXDQ_PRODIDX)); 1679 } 1680 return (rx_npkts); 1681 } 1682 1683 /* 1684 * Read the transmit status from the completion queue and release 1685 * mbufs. Note that the buffer descriptor index in the completion 1686 * descriptor is an offset from the start of the transmit buffer 1687 * descriptor list in bytes. This is important because the manual 1688 * gives the impression that it should match the producer/consumer 1689 * index, which is the offset in 8 byte blocks. 1690 */ 1691 static void 1692 sf_txeof(struct sf_softc *sc) 1693 { 1694 struct sf_txdesc *txd; 1695 struct sf_tx_rcdesc *cur_cmp; 1696 struct ifnet *ifp; 1697 uint32_t status; 1698 int cons, idx, prod; 1699 1700 SF_LOCK_ASSERT(sc); 1701 1702 ifp = sc->sf_ifp; 1703 1704 bus_dmamap_sync(sc->sf_cdata.sf_tx_cring_tag, 1705 sc->sf_cdata.sf_tx_cring_map, 1706 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1707 1708 cons = sc->sf_cdata.sf_txc_cons; 1709 prod = (csr_read_4(sc, SF_CQ_PRODIDX) & SF_TXDQ_PRODIDX_HIPRIO) >> 16; 1710 if (prod == cons) 1711 return; 1712 1713 for (; cons != prod; SF_INC(cons, SF_TX_CLIST_CNT)) { 1714 cur_cmp = &sc->sf_rdata.sf_tx_cring[cons]; 1715 status = le32toh(cur_cmp->sf_tx_status1); 1716 if (status == 0) 1717 break; 1718 switch (status & SF_TX_CMPDESC_TYPE) { 1719 case SF_TXCMPTYPE_TX: 1720 /* Tx complete entry. */ 1721 break; 1722 case SF_TXCMPTYPE_DMA: 1723 /* DMA complete entry. */ 1724 idx = status & SF_TX_CMPDESC_IDX; 1725 idx = idx / sizeof(struct sf_tx_rdesc); 1726 /* 1727 * We don't need to check Tx status here. 1728 * SF_ISR_TX_LOFIFO intr would handle this. 1729 * Note, if_opackets, if_collisions and if_oerrors 1730 * counters are handled in sf_stats_update(). 1731 */ 1732 txd = &sc->sf_cdata.sf_txdesc[idx]; 1733 if (txd->tx_m != NULL) { 1734 bus_dmamap_sync(sc->sf_cdata.sf_tx_tag, 1735 txd->tx_dmamap, 1736 BUS_DMASYNC_POSTWRITE); 1737 bus_dmamap_unload(sc->sf_cdata.sf_tx_tag, 1738 txd->tx_dmamap); 1739 m_freem(txd->tx_m); 1740 txd->tx_m = NULL; 1741 } 1742 sc->sf_cdata.sf_tx_cnt -= txd->ndesc; 1743 KASSERT(sc->sf_cdata.sf_tx_cnt >= 0, 1744 ("%s: Active Tx desc counter was garbled\n", 1745 __func__)); 1746 txd->ndesc = 0; 1747 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1748 break; 1749 default: 1750 /* It should not happen. */ 1751 device_printf(sc->sf_dev, 1752 "unknown Tx completion type : 0x%08x : %d : %d\n", 1753 status, cons, prod); 1754 break; 1755 } 1756 cur_cmp->sf_tx_status1 = 0; 1757 } 1758 1759 sc->sf_cdata.sf_txc_cons = cons; 1760 bus_dmamap_sync(sc->sf_cdata.sf_tx_cring_tag, 1761 sc->sf_cdata.sf_tx_cring_map, 1762 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1763 1764 if (sc->sf_cdata.sf_tx_cnt == 0) 1765 sc->sf_watchdog_timer = 0; 1766 1767 /* Update Tx completion consumer index. */ 1768 csr_write_4(sc, SF_CQ_CONSIDX, 1769 (csr_read_4(sc, SF_CQ_CONSIDX) & 0xffff) | 1770 ((cons << 16) & 0xffff0000)); 1771 } 1772 1773 static void 1774 sf_txthresh_adjust(struct sf_softc *sc) 1775 { 1776 uint32_t txfctl; 1777 1778 device_printf(sc->sf_dev, "Tx underrun -- "); 1779 if (sc->sf_txthresh < SF_MAX_TX_THRESHOLD) { 1780 txfctl = csr_read_4(sc, SF_TX_FRAMCTL); 1781 /* Increase Tx threshold 256 bytes. */ 1782 sc->sf_txthresh += 16; 1783 if (sc->sf_txthresh > SF_MAX_TX_THRESHOLD) 1784 sc->sf_txthresh = SF_MAX_TX_THRESHOLD; 1785 txfctl &= ~SF_TXFRMCTL_TXTHRESH; 1786 txfctl |= sc->sf_txthresh; 1787 printf("increasing Tx threshold to %d bytes\n", 1788 sc->sf_txthresh * SF_TX_THRESHOLD_UNIT); 1789 csr_write_4(sc, SF_TX_FRAMCTL, txfctl); 1790 } else 1791 printf("\n"); 1792 } 1793 1794 #ifdef DEVICE_POLLING 1795 static int 1796 sf_poll(struct ifnet *ifp, enum poll_cmd cmd, int count) 1797 { 1798 struct sf_softc *sc; 1799 uint32_t status; 1800 int rx_npkts; 1801 1802 sc = ifp->if_softc; 1803 rx_npkts = 0; 1804 SF_LOCK(sc); 1805 1806 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1807 SF_UNLOCK(sc); 1808 return (rx_npkts); 1809 } 1810 1811 sc->rxcycles = count; 1812 rx_npkts = sf_rxeof(sc); 1813 sf_txeof(sc); 1814 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) 1815 sf_start_locked(ifp); 1816 1817 if (cmd == POLL_AND_CHECK_STATUS) { 1818 /* Reading the ISR register clears all interrrupts. */ 1819 status = csr_read_4(sc, SF_ISR); 1820 1821 if ((status & SF_ISR_ABNORMALINTR) != 0) { 1822 if ((status & SF_ISR_STATSOFLOW) != 0) 1823 sf_stats_update(sc); 1824 else if ((status & SF_ISR_TX_LOFIFO) != 0) 1825 sf_txthresh_adjust(sc); 1826 else if ((status & SF_ISR_DMAERR) != 0) { 1827 device_printf(sc->sf_dev, 1828 "DMA error, resetting\n"); 1829 sf_init_locked(sc); 1830 } else if ((status & SF_ISR_NO_TX_CSUM) != 0) { 1831 sc->sf_statistics.sf_tx_gfp_stall++; 1832 #ifdef SF_GFP_DEBUG 1833 device_printf(sc->sf_dev, 1834 "TxGFP is not responding!\n"); 1835 #endif 1836 } else if ((status & SF_ISR_RXGFP_NORESP) != 0) { 1837 sc->sf_statistics.sf_rx_gfp_stall++; 1838 #ifdef SF_GFP_DEBUG 1839 device_printf(sc->sf_dev, 1840 "RxGFP is not responding!\n"); 1841 #endif 1842 } 1843 } 1844 } 1845 1846 SF_UNLOCK(sc); 1847 return (rx_npkts); 1848 } 1849 #endif /* DEVICE_POLLING */ 1850 1851 static void 1852 sf_intr(void *arg) 1853 { 1854 struct sf_softc *sc; 1855 struct ifnet *ifp; 1856 uint32_t status; 1857 1858 sc = (struct sf_softc *)arg; 1859 SF_LOCK(sc); 1860 1861 if (sc->sf_suspended != 0) 1862 goto done_locked; 1863 1864 /* Reading the ISR register clears all interrrupts. */ 1865 status = csr_read_4(sc, SF_ISR); 1866 if (status == 0 || status == 0xffffffff || 1867 (status & SF_ISR_PCIINT_ASSERTED) == 0) 1868 goto done_locked; 1869 1870 ifp = sc->sf_ifp; 1871 #ifdef DEVICE_POLLING 1872 if ((ifp->if_capenable & IFCAP_POLLING) != 0) 1873 goto done_locked; 1874 #endif 1875 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1876 goto done_locked; 1877 1878 /* Disable interrupts. */ 1879 csr_write_4(sc, SF_IMR, 0x00000000); 1880 1881 for (; (status & SF_INTRS) != 0;) { 1882 if ((status & SF_ISR_RXDQ1_DMADONE) != 0) 1883 sf_rxeof(sc); 1884 1885 if ((status & (SF_ISR_TX_TXDONE | SF_ISR_TX_DMADONE | 1886 SF_ISR_TX_QUEUEDONE)) != 0) 1887 sf_txeof(sc); 1888 1889 if ((status & SF_ISR_ABNORMALINTR) != 0) { 1890 if ((status & SF_ISR_STATSOFLOW) != 0) 1891 sf_stats_update(sc); 1892 else if ((status & SF_ISR_TX_LOFIFO) != 0) 1893 sf_txthresh_adjust(sc); 1894 else if ((status & SF_ISR_DMAERR) != 0) { 1895 device_printf(sc->sf_dev, 1896 "DMA error, resetting\n"); 1897 sf_init_locked(sc); 1898 break; 1899 } else if ((status & SF_ISR_NO_TX_CSUM) != 0) { 1900 sc->sf_statistics.sf_tx_gfp_stall++; 1901 #ifdef SF_GFP_DEBUG 1902 device_printf(sc->sf_dev, 1903 "TxGFP is not responding!\n"); 1904 #endif 1905 } 1906 else if ((status & SF_ISR_RXGFP_NORESP) != 0) { 1907 sc->sf_statistics.sf_rx_gfp_stall++; 1908 #ifdef SF_GFP_DEBUG 1909 device_printf(sc->sf_dev, 1910 "RxGFP is not responding!\n"); 1911 #endif 1912 } 1913 } 1914 /* Reading the ISR register clears all interrrupts. */ 1915 status = csr_read_4(sc, SF_ISR); 1916 } 1917 1918 /* Re-enable interrupts. */ 1919 csr_write_4(sc, SF_IMR, SF_INTRS); 1920 1921 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) 1922 sf_start_locked(ifp); 1923 done_locked: 1924 SF_UNLOCK(sc); 1925 } 1926 1927 static void 1928 sf_download_fw(struct sf_softc *sc) 1929 { 1930 uint32_t gfpinst; 1931 int i, ndx; 1932 uint8_t *p; 1933 1934 /* 1935 * A FP instruction is composed of 48bits so we have to 1936 * write it with two parts. 1937 */ 1938 p = txfwdata; 1939 ndx = 0; 1940 for (i = 0; i < sizeof(txfwdata) / SF_GFP_INST_BYTES; i++) { 1941 gfpinst = p[2] << 24 | p[3] << 16 | p[4] << 8 | p[5]; 1942 csr_write_4(sc, SF_TXGFP_MEM_BASE + ndx * 4, gfpinst); 1943 gfpinst = p[0] << 8 | p[1]; 1944 csr_write_4(sc, SF_TXGFP_MEM_BASE + (ndx + 1) * 4, gfpinst); 1945 p += SF_GFP_INST_BYTES; 1946 ndx += 2; 1947 } 1948 if (bootverbose) 1949 device_printf(sc->sf_dev, "%d Tx instructions downloaded\n", i); 1950 1951 p = rxfwdata; 1952 ndx = 0; 1953 for (i = 0; i < sizeof(rxfwdata) / SF_GFP_INST_BYTES; i++) { 1954 gfpinst = p[2] << 24 | p[3] << 16 | p[4] << 8 | p[5]; 1955 csr_write_4(sc, SF_RXGFP_MEM_BASE + (ndx * 4), gfpinst); 1956 gfpinst = p[0] << 8 | p[1]; 1957 csr_write_4(sc, SF_RXGFP_MEM_BASE + (ndx + 1) * 4, gfpinst); 1958 p += SF_GFP_INST_BYTES; 1959 ndx += 2; 1960 } 1961 if (bootverbose) 1962 device_printf(sc->sf_dev, "%d Rx instructions downloaded\n", i); 1963 } 1964 1965 static void 1966 sf_init(void *xsc) 1967 { 1968 struct sf_softc *sc; 1969 1970 sc = (struct sf_softc *)xsc; 1971 SF_LOCK(sc); 1972 sf_init_locked(sc); 1973 SF_UNLOCK(sc); 1974 } 1975 1976 static void 1977 sf_init_locked(struct sf_softc *sc) 1978 { 1979 struct ifnet *ifp; 1980 struct mii_data *mii; 1981 uint8_t eaddr[ETHER_ADDR_LEN]; 1982 bus_addr_t addr; 1983 int i; 1984 1985 SF_LOCK_ASSERT(sc); 1986 ifp = sc->sf_ifp; 1987 mii = device_get_softc(sc->sf_miibus); 1988 1989 sf_stop(sc); 1990 /* Reset the hardware to a known state. */ 1991 sf_reset(sc); 1992 1993 /* Init all the receive filter registers */ 1994 for (i = SF_RXFILT_PERFECT_BASE; 1995 i < (SF_RXFILT_HASH_MAX + 1); i += sizeof(uint32_t)) 1996 csr_write_4(sc, i, 0); 1997 1998 /* Empty stats counter registers. */ 1999 for (i = SF_STATS_BASE; i < (SF_STATS_END + 1); i += sizeof(uint32_t)) 2000 csr_write_4(sc, i, 0); 2001 2002 /* Init our MAC address. */ 2003 bcopy(IF_LLADDR(sc->sf_ifp), eaddr, sizeof(eaddr)); 2004 csr_write_4(sc, SF_PAR0, 2005 eaddr[2] << 24 | eaddr[3] << 16 | eaddr[4] << 8 | eaddr[5]); 2006 csr_write_4(sc, SF_PAR1, eaddr[0] << 8 | eaddr[1]); 2007 sf_setperf(sc, 0, eaddr); 2008 2009 if (sf_init_rx_ring(sc) == ENOBUFS) { 2010 device_printf(sc->sf_dev, 2011 "initialization failed: no memory for rx buffers\n"); 2012 return; 2013 } 2014 2015 sf_init_tx_ring(sc); 2016 2017 /* 2018 * 16 perfect address filtering. 2019 * Hash only multicast destination address, Accept matching 2020 * frames regardless of VLAN ID. 2021 */ 2022 csr_write_4(sc, SF_RXFILT, SF_PERFMODE_NORMAL | SF_HASHMODE_ANYVLAN); 2023 2024 /* 2025 * Set Rx filter. 2026 */ 2027 sf_rxfilter(sc); 2028 2029 /* Init the completion queue indexes. */ 2030 csr_write_4(sc, SF_CQ_CONSIDX, 0); 2031 csr_write_4(sc, SF_CQ_PRODIDX, 0); 2032 2033 /* Init the RX completion queue. */ 2034 addr = sc->sf_rdata.sf_rx_cring_paddr; 2035 csr_write_4(sc, SF_CQ_ADDR_HI, SF_ADDR_HI(addr)); 2036 csr_write_4(sc, SF_RXCQ_CTL_1, SF_ADDR_LO(addr) & SF_RXCQ_ADDR); 2037 if (SF_ADDR_HI(addr) != 0) 2038 SF_SETBIT(sc, SF_RXCQ_CTL_1, SF_RXCQ_USE_64BIT); 2039 /* Set RX completion queue type 2. */ 2040 SF_SETBIT(sc, SF_RXCQ_CTL_1, SF_RXCQTYPE_2); 2041 csr_write_4(sc, SF_RXCQ_CTL_2, 0); 2042 2043 /* 2044 * Init RX DMA control. 2045 * default RxHighPriority Threshold, 2046 * default RxBurstSize, 128bytes. 2047 */ 2048 SF_SETBIT(sc, SF_RXDMA_CTL, 2049 SF_RXDMA_REPORTBADPKTS | 2050 (SF_RXDMA_HIGHPRIO_THRESH << 8) | 2051 SF_RXDMA_BURST); 2052 2053 /* Init the RX buffer descriptor queue. */ 2054 addr = sc->sf_rdata.sf_rx_ring_paddr; 2055 csr_write_4(sc, SF_RXDQ_ADDR_HI, SF_ADDR_HI(addr)); 2056 csr_write_4(sc, SF_RXDQ_ADDR_Q1, SF_ADDR_LO(addr)); 2057 2058 /* Set RX queue buffer length. */ 2059 csr_write_4(sc, SF_RXDQ_CTL_1, 2060 ((MCLBYTES - sizeof(uint32_t)) << 16) | 2061 SF_RXDQCTL_64BITBADDR | SF_RXDQCTL_VARIABLE); 2062 2063 if (SF_ADDR_HI(addr) != 0) 2064 SF_SETBIT(sc, SF_RXDQ_CTL_1, SF_RXDQCTL_64BITDADDR); 2065 csr_write_4(sc, SF_RXDQ_PTR_Q1, SF_RX_DLIST_CNT - 1); 2066 csr_write_4(sc, SF_RXDQ_CTL_2, 0); 2067 2068 /* Init the TX completion queue */ 2069 addr = sc->sf_rdata.sf_tx_cring_paddr; 2070 csr_write_4(sc, SF_TXCQ_CTL, SF_ADDR_LO(addr) & SF_TXCQ_ADDR); 2071 if (SF_ADDR_HI(addr) != 0) 2072 SF_SETBIT(sc, SF_TXCQ_CTL, SF_TXCQ_USE_64BIT); 2073 2074 /* Init the TX buffer descriptor queue. */ 2075 addr = sc->sf_rdata.sf_tx_ring_paddr; 2076 csr_write_4(sc, SF_TXDQ_ADDR_HI, SF_ADDR_HI(addr)); 2077 csr_write_4(sc, SF_TXDQ_ADDR_HIPRIO, 0); 2078 csr_write_4(sc, SF_TXDQ_ADDR_LOPRIO, SF_ADDR_LO(addr)); 2079 csr_write_4(sc, SF_TX_FRAMCTL, 2080 SF_TXFRMCTL_CPLAFTERTX | sc->sf_txthresh); 2081 csr_write_4(sc, SF_TXDQ_CTL, 2082 SF_TXDMA_HIPRIO_THRESH << 24 | 2083 SF_TXSKIPLEN_0BYTES << 16 | 2084 SF_TXDDMA_BURST << 8 | 2085 SF_TXBUFDESC_TYPE2 | SF_TXMINSPACE_UNLIMIT); 2086 if (SF_ADDR_HI(addr) != 0) 2087 SF_SETBIT(sc, SF_TXDQ_CTL, SF_TXDQCTL_64BITADDR); 2088 2089 /* Set VLAN Type register. */ 2090 csr_write_4(sc, SF_VLANTYPE, ETHERTYPE_VLAN); 2091 2092 /* Set TxPause Timer. */ 2093 csr_write_4(sc, SF_TXPAUSETIMER, 0xffff); 2094 2095 /* Enable autopadding of short TX frames. */ 2096 SF_SETBIT(sc, SF_MACCFG_1, SF_MACCFG1_AUTOPAD); 2097 SF_SETBIT(sc, SF_MACCFG_2, SF_MACCFG2_AUTOVLANPAD); 2098 /* Make sure to reset MAC to take changes effect. */ 2099 SF_SETBIT(sc, SF_MACCFG_1, SF_MACCFG1_SOFTRESET); 2100 DELAY(1000); 2101 SF_CLRBIT(sc, SF_MACCFG_1, SF_MACCFG1_SOFTRESET); 2102 2103 /* Enable PCI bus master. */ 2104 SF_SETBIT(sc, SF_PCI_DEVCFG, SF_PCIDEVCFG_PCIMEN); 2105 2106 /* Load StarFire firmware. */ 2107 sf_download_fw(sc); 2108 2109 /* Intialize interrupt moderation. */ 2110 csr_write_4(sc, SF_TIMER_CTL, SF_TIMER_IMASK_MODE | SF_TIMER_TIMES_TEN | 2111 (sc->sf_int_mod & SF_TIMER_IMASK_INTERVAL)); 2112 2113 #ifdef DEVICE_POLLING 2114 /* Disable interrupts if we are polling. */ 2115 if ((ifp->if_capenable & IFCAP_POLLING) != 0) 2116 csr_write_4(sc, SF_IMR, 0x00000000); 2117 else 2118 #endif 2119 /* Enable interrupts. */ 2120 csr_write_4(sc, SF_IMR, SF_INTRS); 2121 SF_SETBIT(sc, SF_PCI_DEVCFG, SF_PCIDEVCFG_INTR_ENB); 2122 2123 /* Enable the RX and TX engines. */ 2124 csr_write_4(sc, SF_GEN_ETH_CTL, 2125 SF_ETHCTL_RX_ENB | SF_ETHCTL_RXDMA_ENB | 2126 SF_ETHCTL_TX_ENB | SF_ETHCTL_TXDMA_ENB); 2127 2128 if ((ifp->if_capenable & IFCAP_TXCSUM) != 0) 2129 SF_SETBIT(sc, SF_GEN_ETH_CTL, SF_ETHCTL_TXGFP_ENB); 2130 else 2131 SF_CLRBIT(sc, SF_GEN_ETH_CTL, SF_ETHCTL_TXGFP_ENB); 2132 if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) 2133 SF_SETBIT(sc, SF_GEN_ETH_CTL, SF_ETHCTL_RXGFP_ENB); 2134 else 2135 SF_CLRBIT(sc, SF_GEN_ETH_CTL, SF_ETHCTL_RXGFP_ENB); 2136 2137 sc->sf_link = 0; 2138 mii_mediachg(mii); 2139 2140 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2141 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2142 2143 callout_reset(&sc->sf_co, hz, sf_tick, sc); 2144 } 2145 2146 static int 2147 sf_encap(struct sf_softc *sc, struct mbuf **m_head) 2148 { 2149 struct sf_txdesc *txd; 2150 struct sf_tx_rdesc *desc; 2151 struct mbuf *m; 2152 bus_dmamap_t map; 2153 bus_dma_segment_t txsegs[SF_MAXTXSEGS]; 2154 int error, i, nsegs, prod, si; 2155 int avail, nskip; 2156 2157 SF_LOCK_ASSERT(sc); 2158 2159 m = *m_head; 2160 prod = sc->sf_cdata.sf_tx_prod; 2161 txd = &sc->sf_cdata.sf_txdesc[prod]; 2162 map = txd->tx_dmamap; 2163 error = bus_dmamap_load_mbuf_sg(sc->sf_cdata.sf_tx_tag, map, 2164 *m_head, txsegs, &nsegs, BUS_DMA_NOWAIT); 2165 if (error == EFBIG) { 2166 m = m_collapse(*m_head, M_DONTWAIT, SF_MAXTXSEGS); 2167 if (m == NULL) { 2168 m_freem(*m_head); 2169 *m_head = NULL; 2170 return (ENOBUFS); 2171 } 2172 *m_head = m; 2173 error = bus_dmamap_load_mbuf_sg(sc->sf_cdata.sf_tx_tag, 2174 map, *m_head, txsegs, &nsegs, BUS_DMA_NOWAIT); 2175 if (error != 0) { 2176 m_freem(*m_head); 2177 *m_head = NULL; 2178 return (error); 2179 } 2180 } else if (error != 0) 2181 return (error); 2182 if (nsegs == 0) { 2183 m_freem(*m_head); 2184 *m_head = NULL; 2185 return (EIO); 2186 } 2187 2188 /* Check number of available descriptors. */ 2189 avail = (SF_TX_DLIST_CNT - 1) - sc->sf_cdata.sf_tx_cnt; 2190 if (avail < nsegs) { 2191 bus_dmamap_unload(sc->sf_cdata.sf_tx_tag, map); 2192 return (ENOBUFS); 2193 } 2194 nskip = 0; 2195 if (prod + nsegs >= SF_TX_DLIST_CNT) { 2196 nskip = SF_TX_DLIST_CNT - prod - 1; 2197 if (avail < nsegs + nskip) { 2198 bus_dmamap_unload(sc->sf_cdata.sf_tx_tag, map); 2199 return (ENOBUFS); 2200 } 2201 } 2202 2203 bus_dmamap_sync(sc->sf_cdata.sf_tx_tag, map, BUS_DMASYNC_PREWRITE); 2204 2205 si = prod; 2206 for (i = 0; i < nsegs; i++) { 2207 desc = &sc->sf_rdata.sf_tx_ring[prod]; 2208 desc->sf_tx_ctrl = htole32(SF_TX_DESC_ID | 2209 (txsegs[i].ds_len & SF_TX_DESC_FRAGLEN)); 2210 desc->sf_tx_reserved = 0; 2211 desc->sf_addr = htole64(txsegs[i].ds_addr); 2212 if (i == 0 && prod + nsegs >= SF_TX_DLIST_CNT) { 2213 /* Queue wraps! */ 2214 desc->sf_tx_ctrl |= htole32(SF_TX_DESC_END); 2215 prod = 0; 2216 } else 2217 SF_INC(prod, SF_TX_DLIST_CNT); 2218 } 2219 /* Update producer index. */ 2220 sc->sf_cdata.sf_tx_prod = prod; 2221 sc->sf_cdata.sf_tx_cnt += nsegs + nskip; 2222 2223 desc = &sc->sf_rdata.sf_tx_ring[si]; 2224 /* Check TDP/UDP checksum offload request. */ 2225 if ((m->m_pkthdr.csum_flags & SF_CSUM_FEATURES) != 0) 2226 desc->sf_tx_ctrl |= htole32(SF_TX_DESC_CALTCP); 2227 desc->sf_tx_ctrl |= 2228 htole32(SF_TX_DESC_CRCEN | SF_TX_DESC_INTR | (nsegs << 16)); 2229 2230 txd->tx_dmamap = map; 2231 txd->tx_m = m; 2232 txd->ndesc = nsegs + nskip; 2233 2234 return (0); 2235 } 2236 2237 static void 2238 sf_start(struct ifnet *ifp) 2239 { 2240 struct sf_softc *sc; 2241 2242 sc = ifp->if_softc; 2243 SF_LOCK(sc); 2244 sf_start_locked(ifp); 2245 SF_UNLOCK(sc); 2246 } 2247 2248 static void 2249 sf_start_locked(struct ifnet *ifp) 2250 { 2251 struct sf_softc *sc; 2252 struct mbuf *m_head; 2253 int enq; 2254 2255 sc = ifp->if_softc; 2256 SF_LOCK_ASSERT(sc); 2257 2258 if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != 2259 IFF_DRV_RUNNING || sc->sf_link == 0) 2260 return; 2261 2262 /* 2263 * Since we don't know when descriptor wrap occurrs in advance 2264 * limit available number of active Tx descriptor counter to be 2265 * higher than maximum number of DMA segments allowed in driver. 2266 */ 2267 for (enq = 0; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) && 2268 sc->sf_cdata.sf_tx_cnt < SF_TX_DLIST_CNT - SF_MAXTXSEGS; ) { 2269 IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head); 2270 if (m_head == NULL) 2271 break; 2272 /* 2273 * Pack the data into the transmit ring. If we 2274 * don't have room, set the OACTIVE flag and wait 2275 * for the NIC to drain the ring. 2276 */ 2277 if (sf_encap(sc, &m_head)) { 2278 if (m_head == NULL) 2279 break; 2280 IFQ_DRV_PREPEND(&ifp->if_snd, m_head); 2281 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2282 break; 2283 } 2284 2285 enq++; 2286 /* 2287 * If there's a BPF listener, bounce a copy of this frame 2288 * to him. 2289 */ 2290 ETHER_BPF_MTAP(ifp, m_head); 2291 } 2292 2293 if (enq > 0) { 2294 bus_dmamap_sync(sc->sf_cdata.sf_tx_ring_tag, 2295 sc->sf_cdata.sf_tx_ring_map, 2296 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 2297 /* Kick transmit. */ 2298 csr_write_4(sc, SF_TXDQ_PRODIDX, 2299 sc->sf_cdata.sf_tx_prod * (sizeof(struct sf_tx_rdesc) / 8)); 2300 2301 /* Set a timeout in case the chip goes out to lunch. */ 2302 sc->sf_watchdog_timer = 5; 2303 } 2304 } 2305 2306 static void 2307 sf_stop(struct sf_softc *sc) 2308 { 2309 struct sf_txdesc *txd; 2310 struct sf_rxdesc *rxd; 2311 struct ifnet *ifp; 2312 int i; 2313 2314 SF_LOCK_ASSERT(sc); 2315 2316 ifp = sc->sf_ifp; 2317 2318 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 2319 sc->sf_link = 0; 2320 callout_stop(&sc->sf_co); 2321 sc->sf_watchdog_timer = 0; 2322 2323 /* Reading the ISR register clears all interrrupts. */ 2324 csr_read_4(sc, SF_ISR); 2325 /* Disable further interrupts. */ 2326 csr_write_4(sc, SF_IMR, 0); 2327 2328 /* Disable Tx/Rx egine. */ 2329 csr_write_4(sc, SF_GEN_ETH_CTL, 0); 2330 2331 csr_write_4(sc, SF_CQ_CONSIDX, 0); 2332 csr_write_4(sc, SF_CQ_PRODIDX, 0); 2333 csr_write_4(sc, SF_RXDQ_ADDR_Q1, 0); 2334 csr_write_4(sc, SF_RXDQ_CTL_1, 0); 2335 csr_write_4(sc, SF_RXDQ_PTR_Q1, 0); 2336 csr_write_4(sc, SF_TXCQ_CTL, 0); 2337 csr_write_4(sc, SF_TXDQ_ADDR_HIPRIO, 0); 2338 csr_write_4(sc, SF_TXDQ_CTL, 0); 2339 2340 /* 2341 * Free RX and TX mbufs still in the queues. 2342 */ 2343 for (i = 0; i < SF_RX_DLIST_CNT; i++) { 2344 rxd = &sc->sf_cdata.sf_rxdesc[i]; 2345 if (rxd->rx_m != NULL) { 2346 bus_dmamap_sync(sc->sf_cdata.sf_rx_tag, 2347 rxd->rx_dmamap, BUS_DMASYNC_POSTREAD); 2348 bus_dmamap_unload(sc->sf_cdata.sf_rx_tag, 2349 rxd->rx_dmamap); 2350 m_freem(rxd->rx_m); 2351 rxd->rx_m = NULL; 2352 } 2353 } 2354 for (i = 0; i < SF_TX_DLIST_CNT; i++) { 2355 txd = &sc->sf_cdata.sf_txdesc[i]; 2356 if (txd->tx_m != NULL) { 2357 bus_dmamap_sync(sc->sf_cdata.sf_tx_tag, 2358 txd->tx_dmamap, BUS_DMASYNC_POSTWRITE); 2359 bus_dmamap_unload(sc->sf_cdata.sf_tx_tag, 2360 txd->tx_dmamap); 2361 m_freem(txd->tx_m); 2362 txd->tx_m = NULL; 2363 txd->ndesc = 0; 2364 } 2365 } 2366 } 2367 2368 static void 2369 sf_tick(void *xsc) 2370 { 2371 struct sf_softc *sc; 2372 struct mii_data *mii; 2373 2374 sc = xsc; 2375 SF_LOCK_ASSERT(sc); 2376 mii = device_get_softc(sc->sf_miibus); 2377 mii_tick(mii); 2378 sf_stats_update(sc); 2379 sf_watchdog(sc); 2380 callout_reset(&sc->sf_co, hz, sf_tick, sc); 2381 } 2382 2383 /* 2384 * Note: it is important that this function not be interrupted. We 2385 * use a two-stage register access scheme: if we are interrupted in 2386 * between setting the indirect address register and reading from the 2387 * indirect data register, the contents of the address register could 2388 * be changed out from under us. 2389 */ 2390 static void 2391 sf_stats_update(struct sf_softc *sc) 2392 { 2393 struct ifnet *ifp; 2394 struct sf_stats now, *stats, *nstats; 2395 int i; 2396 2397 SF_LOCK_ASSERT(sc); 2398 2399 ifp = sc->sf_ifp; 2400 stats = &now; 2401 2402 stats->sf_tx_frames = 2403 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_FRAMES); 2404 stats->sf_tx_single_colls = 2405 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_SINGLE_COL); 2406 stats->sf_tx_multi_colls = 2407 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_MULTI_COL); 2408 stats->sf_tx_crcerrs = 2409 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_CRC_ERRS); 2410 stats->sf_tx_bytes = 2411 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_BYTES); 2412 stats->sf_tx_deferred = 2413 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_DEFERRED); 2414 stats->sf_tx_late_colls = 2415 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_LATE_COL); 2416 stats->sf_tx_pause_frames = 2417 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_PAUSE); 2418 stats->sf_tx_control_frames = 2419 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_CTL_FRAME); 2420 stats->sf_tx_excess_colls = 2421 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_EXCESS_COL); 2422 stats->sf_tx_excess_defer = 2423 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_EXCESS_DEF); 2424 stats->sf_tx_mcast_frames = 2425 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_MULTI); 2426 stats->sf_tx_bcast_frames = 2427 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_BCAST); 2428 stats->sf_tx_frames_lost = 2429 csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_FRAME_LOST); 2430 stats->sf_rx_frames = 2431 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_FRAMES); 2432 stats->sf_rx_crcerrs = 2433 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_CRC_ERRS); 2434 stats->sf_rx_alignerrs = 2435 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_ALIGN_ERRS); 2436 stats->sf_rx_bytes = 2437 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_BYTES); 2438 stats->sf_rx_pause_frames = 2439 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_PAUSE); 2440 stats->sf_rx_control_frames = 2441 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_CTL_FRAME); 2442 stats->sf_rx_unsup_control_frames = 2443 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_UNSUP_FRAME); 2444 stats->sf_rx_giants = 2445 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_GIANTS); 2446 stats->sf_rx_runts = 2447 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_RUNTS); 2448 stats->sf_rx_jabbererrs = 2449 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_JABBER); 2450 stats->sf_rx_fragments = 2451 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_FRAGMENTS); 2452 stats->sf_rx_pkts_64 = 2453 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_64); 2454 stats->sf_rx_pkts_65_127 = 2455 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_65_127); 2456 stats->sf_rx_pkts_128_255 = 2457 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_128_255); 2458 stats->sf_rx_pkts_256_511 = 2459 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_256_511); 2460 stats->sf_rx_pkts_512_1023 = 2461 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_512_1023); 2462 stats->sf_rx_pkts_1024_1518 = 2463 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_1024_1518); 2464 stats->sf_rx_frames_lost = 2465 csr_read_4(sc, SF_STATS_BASE + SF_STATS_RX_FRAME_LOST); 2466 /* Lower 16bits are valid. */ 2467 stats->sf_tx_underruns = 2468 (csr_read_4(sc, SF_STATS_BASE + SF_STATS_TX_UNDERRUN) & 0xffff); 2469 2470 /* Empty stats counter registers. */ 2471 for (i = SF_STATS_BASE; i < (SF_STATS_END + 1); i += sizeof(uint32_t)) 2472 csr_write_4(sc, i, 0); 2473 2474 ifp->if_opackets += (u_long)stats->sf_tx_frames; 2475 2476 ifp->if_collisions += (u_long)stats->sf_tx_single_colls + 2477 (u_long)stats->sf_tx_multi_colls; 2478 2479 ifp->if_oerrors += (u_long)stats->sf_tx_excess_colls + 2480 (u_long)stats->sf_tx_excess_defer + 2481 (u_long)stats->sf_tx_frames_lost; 2482 2483 ifp->if_ipackets += (u_long)stats->sf_rx_frames; 2484 2485 ifp->if_ierrors += (u_long)stats->sf_rx_crcerrs + 2486 (u_long)stats->sf_rx_alignerrs + 2487 (u_long)stats->sf_rx_giants + 2488 (u_long)stats->sf_rx_runts + 2489 (u_long)stats->sf_rx_jabbererrs + 2490 (u_long)stats->sf_rx_frames_lost; 2491 2492 nstats = &sc->sf_statistics; 2493 2494 nstats->sf_tx_frames += stats->sf_tx_frames; 2495 nstats->sf_tx_single_colls += stats->sf_tx_single_colls; 2496 nstats->sf_tx_multi_colls += stats->sf_tx_multi_colls; 2497 nstats->sf_tx_crcerrs += stats->sf_tx_crcerrs; 2498 nstats->sf_tx_bytes += stats->sf_tx_bytes; 2499 nstats->sf_tx_deferred += stats->sf_tx_deferred; 2500 nstats->sf_tx_late_colls += stats->sf_tx_late_colls; 2501 nstats->sf_tx_pause_frames += stats->sf_tx_pause_frames; 2502 nstats->sf_tx_control_frames += stats->sf_tx_control_frames; 2503 nstats->sf_tx_excess_colls += stats->sf_tx_excess_colls; 2504 nstats->sf_tx_excess_defer += stats->sf_tx_excess_defer; 2505 nstats->sf_tx_mcast_frames += stats->sf_tx_mcast_frames; 2506 nstats->sf_tx_bcast_frames += stats->sf_tx_bcast_frames; 2507 nstats->sf_tx_frames_lost += stats->sf_tx_frames_lost; 2508 nstats->sf_rx_frames += stats->sf_rx_frames; 2509 nstats->sf_rx_crcerrs += stats->sf_rx_crcerrs; 2510 nstats->sf_rx_alignerrs += stats->sf_rx_alignerrs; 2511 nstats->sf_rx_bytes += stats->sf_rx_bytes; 2512 nstats->sf_rx_pause_frames += stats->sf_rx_pause_frames; 2513 nstats->sf_rx_control_frames += stats->sf_rx_control_frames; 2514 nstats->sf_rx_unsup_control_frames += stats->sf_rx_unsup_control_frames; 2515 nstats->sf_rx_giants += stats->sf_rx_giants; 2516 nstats->sf_rx_runts += stats->sf_rx_runts; 2517 nstats->sf_rx_jabbererrs += stats->sf_rx_jabbererrs; 2518 nstats->sf_rx_fragments += stats->sf_rx_fragments; 2519 nstats->sf_rx_pkts_64 += stats->sf_rx_pkts_64; 2520 nstats->sf_rx_pkts_65_127 += stats->sf_rx_pkts_65_127; 2521 nstats->sf_rx_pkts_128_255 += stats->sf_rx_pkts_128_255; 2522 nstats->sf_rx_pkts_256_511 += stats->sf_rx_pkts_256_511; 2523 nstats->sf_rx_pkts_512_1023 += stats->sf_rx_pkts_512_1023; 2524 nstats->sf_rx_pkts_1024_1518 += stats->sf_rx_pkts_1024_1518; 2525 nstats->sf_rx_frames_lost += stats->sf_rx_frames_lost; 2526 nstats->sf_tx_underruns += stats->sf_tx_underruns; 2527 } 2528 2529 static void 2530 sf_watchdog(struct sf_softc *sc) 2531 { 2532 struct ifnet *ifp; 2533 2534 SF_LOCK_ASSERT(sc); 2535 2536 if (sc->sf_watchdog_timer == 0 || --sc->sf_watchdog_timer) 2537 return; 2538 2539 ifp = sc->sf_ifp; 2540 2541 ifp->if_oerrors++; 2542 if (sc->sf_link == 0) { 2543 if (bootverbose) 2544 if_printf(sc->sf_ifp, "watchdog timeout " 2545 "(missed link)\n"); 2546 } else 2547 if_printf(ifp, "watchdog timeout, %d Tx descs are active\n", 2548 sc->sf_cdata.sf_tx_cnt); 2549 2550 sf_init_locked(sc); 2551 2552 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) 2553 sf_start_locked(ifp); 2554 } 2555 2556 static int 2557 sf_shutdown(device_t dev) 2558 { 2559 struct sf_softc *sc; 2560 2561 sc = device_get_softc(dev); 2562 2563 SF_LOCK(sc); 2564 sf_stop(sc); 2565 SF_UNLOCK(sc); 2566 2567 return (0); 2568 } 2569 2570 static int 2571 sf_suspend(device_t dev) 2572 { 2573 struct sf_softc *sc; 2574 2575 sc = device_get_softc(dev); 2576 2577 SF_LOCK(sc); 2578 sf_stop(sc); 2579 sc->sf_suspended = 1; 2580 bus_generic_suspend(dev); 2581 SF_UNLOCK(sc); 2582 2583 return (0); 2584 } 2585 2586 static int 2587 sf_resume(device_t dev) 2588 { 2589 struct sf_softc *sc; 2590 struct ifnet *ifp; 2591 2592 sc = device_get_softc(dev); 2593 2594 SF_LOCK(sc); 2595 bus_generic_resume(dev); 2596 ifp = sc->sf_ifp; 2597 if ((ifp->if_flags & IFF_UP) != 0) 2598 sf_init_locked(sc); 2599 2600 sc->sf_suspended = 0; 2601 SF_UNLOCK(sc); 2602 2603 return (0); 2604 } 2605 2606 static int 2607 sf_sysctl_stats(SYSCTL_HANDLER_ARGS) 2608 { 2609 struct sf_softc *sc; 2610 struct sf_stats *stats; 2611 int error; 2612 int result; 2613 2614 result = -1; 2615 error = sysctl_handle_int(oidp, &result, 0, req); 2616 2617 if (error != 0 || req->newptr == NULL) 2618 return (error); 2619 2620 if (result != 1) 2621 return (error); 2622 2623 sc = (struct sf_softc *)arg1; 2624 stats = &sc->sf_statistics; 2625 2626 printf("%s statistics:\n", device_get_nameunit(sc->sf_dev)); 2627 printf("Transmit good frames : %ju\n", 2628 (uintmax_t)stats->sf_tx_frames); 2629 printf("Transmit good octets : %ju\n", 2630 (uintmax_t)stats->sf_tx_bytes); 2631 printf("Transmit single collisions : %u\n", 2632 stats->sf_tx_single_colls); 2633 printf("Transmit multiple collisions : %u\n", 2634 stats->sf_tx_multi_colls); 2635 printf("Transmit late collisions : %u\n", 2636 stats->sf_tx_late_colls); 2637 printf("Transmit abort due to excessive collisions : %u\n", 2638 stats->sf_tx_excess_colls); 2639 printf("Transmit CRC errors : %u\n", 2640 stats->sf_tx_crcerrs); 2641 printf("Transmit deferrals : %u\n", 2642 stats->sf_tx_deferred); 2643 printf("Transmit abort due to excessive deferrals : %u\n", 2644 stats->sf_tx_excess_defer); 2645 printf("Transmit pause control frames : %u\n", 2646 stats->sf_tx_pause_frames); 2647 printf("Transmit control frames : %u\n", 2648 stats->sf_tx_control_frames); 2649 printf("Transmit good multicast frames : %u\n", 2650 stats->sf_tx_mcast_frames); 2651 printf("Transmit good broadcast frames : %u\n", 2652 stats->sf_tx_bcast_frames); 2653 printf("Transmit frames lost due to internal transmit errors : %u\n", 2654 stats->sf_tx_frames_lost); 2655 printf("Transmit FIFO underflows : %u\n", 2656 stats->sf_tx_underruns); 2657 printf("Transmit GFP stalls : %u\n", stats->sf_tx_gfp_stall); 2658 printf("Receive good frames : %ju\n", 2659 (uint64_t)stats->sf_rx_frames); 2660 printf("Receive good octets : %ju\n", 2661 (uint64_t)stats->sf_rx_bytes); 2662 printf("Receive CRC errors : %u\n", 2663 stats->sf_rx_crcerrs); 2664 printf("Receive alignment errors : %u\n", 2665 stats->sf_rx_alignerrs); 2666 printf("Receive pause frames : %u\n", 2667 stats->sf_rx_pause_frames); 2668 printf("Receive control frames : %u\n", 2669 stats->sf_rx_control_frames); 2670 printf("Receive control frames with unsupported opcode : %u\n", 2671 stats->sf_rx_unsup_control_frames); 2672 printf("Receive frames too long : %u\n", 2673 stats->sf_rx_giants); 2674 printf("Receive frames too short : %u\n", 2675 stats->sf_rx_runts); 2676 printf("Receive frames jabber errors : %u\n", 2677 stats->sf_rx_jabbererrs); 2678 printf("Receive frames fragments : %u\n", 2679 stats->sf_rx_fragments); 2680 printf("Receive packets 64 bytes : %ju\n", 2681 (uint64_t)stats->sf_rx_pkts_64); 2682 printf("Receive packets 65 to 127 bytes : %ju\n", 2683 (uint64_t)stats->sf_rx_pkts_65_127); 2684 printf("Receive packets 128 to 255 bytes : %ju\n", 2685 (uint64_t)stats->sf_rx_pkts_128_255); 2686 printf("Receive packets 256 to 511 bytes : %ju\n", 2687 (uint64_t)stats->sf_rx_pkts_256_511); 2688 printf("Receive packets 512 to 1023 bytes : %ju\n", 2689 (uint64_t)stats->sf_rx_pkts_512_1023); 2690 printf("Receive packets 1024 to 1518 bytes : %ju\n", 2691 (uint64_t)stats->sf_rx_pkts_1024_1518); 2692 printf("Receive frames lost due to internal receive errors : %u\n", 2693 stats->sf_rx_frames_lost); 2694 printf("Receive GFP stalls : %u\n", stats->sf_rx_gfp_stall); 2695 2696 return (error); 2697 } 2698 2699 static int 2700 sysctl_int_range(SYSCTL_HANDLER_ARGS, int low, int high) 2701 { 2702 int error, value; 2703 2704 if (!arg1) 2705 return (EINVAL); 2706 value = *(int *)arg1; 2707 error = sysctl_handle_int(oidp, &value, 0, req); 2708 if (error || !req->newptr) 2709 return (error); 2710 if (value < low || value > high) 2711 return (EINVAL); 2712 *(int *)arg1 = value; 2713 2714 return (0); 2715 } 2716 2717 static int 2718 sysctl_hw_sf_int_mod(SYSCTL_HANDLER_ARGS) 2719 { 2720 2721 return (sysctl_int_range(oidp, arg1, arg2, req, SF_IM_MIN, SF_IM_MAX)); 2722 }
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