Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/gem/if_gem.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 3 * 4 * Copyright (C) 2001 Eduardo Horvath. 5 * Copyright (c) 2001-2003 Thomas Moestl 6 * Copyright (c) 2007 Marius Strobl <marius@FreeBSD.org> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * from: NetBSD: gem.c,v 1.21 2002/06/01 23:50:58 lukem Exp 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * Driver for Apple GMAC, Sun ERI and Sun GEM Ethernet controllers 38 */ 39 40 #if 0 41 #define GEM_DEBUG 42 #endif 43 44 #if 0 /* XXX: In case of emergency, re-enable this. */ 45 #define GEM_RINT_TIMEOUT 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/bus.h> 51 #include <sys/callout.h> 52 #include <sys/endian.h> 53 #include <sys/mbuf.h> 54 #include <sys/malloc.h> 55 #include <sys/kernel.h> 56 #include <sys/lock.h> 57 #include <sys/module.h> 58 #include <sys/mutex.h> 59 #include <sys/socket.h> 60 #include <sys/sockio.h> 61 #include <sys/rman.h> 62 63 #include <net/bpf.h> 64 #include <net/ethernet.h> 65 #include <net/if.h> 66 #include <net/if_var.h> 67 #include <net/if_arp.h> 68 #include <net/if_dl.h> 69 #include <net/if_media.h> 70 #include <net/if_types.h> 71 #include <net/if_vlan_var.h> 72 73 #include <netinet/in.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/ip.h> 76 #include <netinet/tcp.h> 77 #include <netinet/udp.h> 78 79 #include <machine/bus.h> 80 81 #include <dev/mii/mii.h> 82 #include <dev/mii/miivar.h> 83 84 #include <dev/gem/if_gemreg.h> 85 #include <dev/gem/if_gemvar.h> 86 87 CTASSERT(powerof2(GEM_NRXDESC) && GEM_NRXDESC >= 32 && GEM_NRXDESC <= 8192); 88 CTASSERT(powerof2(GEM_NTXDESC) && GEM_NTXDESC >= 32 && GEM_NTXDESC <= 8192); 89 90 #define GEM_TRIES 10000 91 92 /* 93 * The hardware supports basic TCP/UDP checksum offloading. However, 94 * the hardware doesn't compensate the checksum for UDP datagram which 95 * can yield to 0x0. As a safe guard, UDP checksum offload is disabled 96 * by default. It can be reactivated by setting special link option 97 * link0 with ifconfig(8). 98 */ 99 #define GEM_CSUM_FEATURES (CSUM_TCP) 100 101 static int gem_add_rxbuf(struct gem_softc *sc, int idx); 102 static int gem_bitwait(struct gem_softc *sc, u_int bank, bus_addr_t r, 103 uint32_t clr, uint32_t set); 104 static void gem_cddma_callback(void *xsc, bus_dma_segment_t *segs, 105 int nsegs, int error); 106 static int gem_disable_rx(struct gem_softc *sc); 107 static int gem_disable_tx(struct gem_softc *sc); 108 static void gem_eint(struct gem_softc *sc, u_int status); 109 static void gem_init(void *xsc); 110 static void gem_init_locked(struct gem_softc *sc); 111 static void gem_init_regs(struct gem_softc *sc); 112 static int gem_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data); 113 static int gem_load_txmbuf(struct gem_softc *sc, struct mbuf **m_head); 114 static int gem_meminit(struct gem_softc *sc); 115 static void gem_mifinit(struct gem_softc *sc); 116 static void gem_reset(struct gem_softc *sc); 117 static int gem_reset_rx(struct gem_softc *sc); 118 static void gem_reset_rxdma(struct gem_softc *sc); 119 static int gem_reset_tx(struct gem_softc *sc); 120 static u_int gem_ringsize(u_int sz); 121 static void gem_rint(struct gem_softc *sc); 122 #ifdef GEM_RINT_TIMEOUT 123 static void gem_rint_timeout(void *arg); 124 #endif 125 static inline void gem_rxcksum(struct mbuf *m, uint64_t flags); 126 static void gem_rxdrain(struct gem_softc *sc); 127 static void gem_setladrf(struct gem_softc *sc); 128 static void gem_start(struct ifnet *ifp); 129 static void gem_start_locked(struct ifnet *ifp); 130 static void gem_stop(struct ifnet *ifp, int disable); 131 static void gem_tick(void *arg); 132 static void gem_tint(struct gem_softc *sc); 133 static inline void gem_txkick(struct gem_softc *sc); 134 static int gem_watchdog(struct gem_softc *sc); 135 136 devclass_t gem_devclass; 137 DRIVER_MODULE(miibus, gem, miibus_driver, miibus_devclass, 0, 0); 138 MODULE_DEPEND(gem, miibus, 1, 1, 1); 139 140 #ifdef GEM_DEBUG 141 #include <sys/ktr.h> 142 #define KTR_GEM KTR_SPARE2 143 #endif 144 145 #define GEM_BANK1_BITWAIT(sc, r, clr, set) \ 146 gem_bitwait((sc), GEM_RES_BANK1, (r), (clr), (set)) 147 #define GEM_BANK2_BITWAIT(sc, r, clr, set) \ 148 gem_bitwait((sc), GEM_RES_BANK2, (r), (clr), (set)) 149 150 int 151 gem_attach(struct gem_softc *sc) 152 { 153 struct gem_txsoft *txs; 154 struct ifnet *ifp; 155 int error, i, phy; 156 uint32_t v; 157 158 if (bootverbose) 159 device_printf(sc->sc_dev, "flags=0x%x\n", sc->sc_flags); 160 161 /* Set up ifnet structure. */ 162 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 163 if (ifp == NULL) 164 return (ENOSPC); 165 sc->sc_csum_features = GEM_CSUM_FEATURES; 166 ifp->if_softc = sc; 167 if_initname(ifp, device_get_name(sc->sc_dev), 168 device_get_unit(sc->sc_dev)); 169 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 170 ifp->if_start = gem_start; 171 ifp->if_ioctl = gem_ioctl; 172 ifp->if_init = gem_init; 173 IFQ_SET_MAXLEN(&ifp->if_snd, GEM_TXQUEUELEN); 174 ifp->if_snd.ifq_drv_maxlen = GEM_TXQUEUELEN; 175 IFQ_SET_READY(&ifp->if_snd); 176 177 callout_init_mtx(&sc->sc_tick_ch, &sc->sc_mtx, 0); 178 #ifdef GEM_RINT_TIMEOUT 179 callout_init_mtx(&sc->sc_rx_ch, &sc->sc_mtx, 0); 180 #endif 181 182 /* Make sure the chip is stopped. */ 183 gem_reset(sc); 184 185 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 186 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 187 BUS_SPACE_MAXSIZE_32BIT, 0, BUS_SPACE_MAXSIZE_32BIT, 0, NULL, 188 NULL, &sc->sc_pdmatag); 189 if (error != 0) 190 goto fail_ifnet; 191 192 error = bus_dma_tag_create(sc->sc_pdmatag, 1, 0, 193 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 194 1, MCLBYTES, BUS_DMA_ALLOCNOW, NULL, NULL, &sc->sc_rdmatag); 195 if (error != 0) 196 goto fail_ptag; 197 198 error = bus_dma_tag_create(sc->sc_pdmatag, 1, 0, 199 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 200 MCLBYTES * GEM_NTXSEGS, GEM_NTXSEGS, MCLBYTES, 201 BUS_DMA_ALLOCNOW, NULL, NULL, &sc->sc_tdmatag); 202 if (error != 0) 203 goto fail_rtag; 204 205 error = bus_dma_tag_create(sc->sc_pdmatag, PAGE_SIZE, 0, 206 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 207 sizeof(struct gem_control_data), 1, 208 sizeof(struct gem_control_data), 0, 209 NULL, NULL, &sc->sc_cdmatag); 210 if (error != 0) 211 goto fail_ttag; 212 213 /* 214 * Allocate the control data structures, create and load the 215 * DMA map for it. 216 */ 217 if ((error = bus_dmamem_alloc(sc->sc_cdmatag, 218 (void **)&sc->sc_control_data, 219 BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_ZERO, 220 &sc->sc_cddmamap)) != 0) { 221 device_printf(sc->sc_dev, 222 "unable to allocate control data, error = %d\n", error); 223 goto fail_ctag; 224 } 225 226 sc->sc_cddma = 0; 227 if ((error = bus_dmamap_load(sc->sc_cdmatag, sc->sc_cddmamap, 228 sc->sc_control_data, sizeof(struct gem_control_data), 229 gem_cddma_callback, sc, 0)) != 0 || sc->sc_cddma == 0) { 230 device_printf(sc->sc_dev, 231 "unable to load control data DMA map, error = %d\n", 232 error); 233 goto fail_cmem; 234 } 235 236 /* 237 * Initialize the transmit job descriptors. 238 */ 239 STAILQ_INIT(&sc->sc_txfreeq); 240 STAILQ_INIT(&sc->sc_txdirtyq); 241 242 /* 243 * Create the transmit buffer DMA maps. 244 */ 245 error = ENOMEM; 246 for (i = 0; i < GEM_TXQUEUELEN; i++) { 247 txs = &sc->sc_txsoft[i]; 248 txs->txs_mbuf = NULL; 249 txs->txs_ndescs = 0; 250 if ((error = bus_dmamap_create(sc->sc_tdmatag, 0, 251 &txs->txs_dmamap)) != 0) { 252 device_printf(sc->sc_dev, 253 "unable to create TX DMA map %d, error = %d\n", 254 i, error); 255 goto fail_txd; 256 } 257 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 258 } 259 260 /* 261 * Create the receive buffer DMA maps. 262 */ 263 for (i = 0; i < GEM_NRXDESC; i++) { 264 if ((error = bus_dmamap_create(sc->sc_rdmatag, 0, 265 &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 266 device_printf(sc->sc_dev, 267 "unable to create RX DMA map %d, error = %d\n", 268 i, error); 269 goto fail_rxd; 270 } 271 sc->sc_rxsoft[i].rxs_mbuf = NULL; 272 } 273 274 /* Bypass probing PHYs if we already know for sure to use a SERDES. */ 275 if ((sc->sc_flags & GEM_SERDES) != 0) 276 goto serdes; 277 278 /* Bad things will happen when touching this register on ERI. */ 279 if (sc->sc_variant != GEM_SUN_ERI) { 280 GEM_BANK1_WRITE_4(sc, GEM_MII_DATAPATH_MODE, 281 GEM_MII_DATAPATH_MII); 282 GEM_BANK1_BARRIER(sc, GEM_MII_DATAPATH_MODE, 4, 283 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 284 } 285 286 gem_mifinit(sc); 287 288 /* 289 * Look for an external PHY. 290 */ 291 error = ENXIO; 292 v = GEM_BANK1_READ_4(sc, GEM_MIF_CONFIG); 293 if ((v & GEM_MIF_CONFIG_MDI1) != 0) { 294 v |= GEM_MIF_CONFIG_PHY_SEL; 295 GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, v); 296 GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4, 297 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 298 switch (sc->sc_variant) { 299 case GEM_SUN_ERI: 300 phy = GEM_PHYAD_EXTERNAL; 301 break; 302 default: 303 phy = MII_PHY_ANY; 304 break; 305 } 306 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 307 gem_mediachange, gem_mediastatus, BMSR_DEFCAPMASK, phy, 308 MII_OFFSET_ANY, MIIF_DOPAUSE); 309 } 310 311 /* 312 * Fall back on an internal PHY if no external PHY was found. 313 * Note that with Apple (K2) GMACs GEM_MIF_CONFIG_MDI0 can't be 314 * trusted when the firmware has powered down the chip. 315 */ 316 if (error != 0 && 317 ((v & GEM_MIF_CONFIG_MDI0) != 0 || GEM_IS_APPLE(sc))) { 318 v &= ~GEM_MIF_CONFIG_PHY_SEL; 319 GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, v); 320 GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4, 321 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 322 switch (sc->sc_variant) { 323 case GEM_SUN_ERI: 324 case GEM_APPLE_K2_GMAC: 325 phy = GEM_PHYAD_INTERNAL; 326 break; 327 case GEM_APPLE_GMAC: 328 phy = GEM_PHYAD_EXTERNAL; 329 break; 330 default: 331 phy = MII_PHY_ANY; 332 break; 333 } 334 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 335 gem_mediachange, gem_mediastatus, BMSR_DEFCAPMASK, phy, 336 MII_OFFSET_ANY, MIIF_DOPAUSE); 337 } 338 339 /* 340 * Try the external PCS SERDES if we didn't find any PHYs. 341 */ 342 if (error != 0 && sc->sc_variant == GEM_SUN_GEM) { 343 serdes: 344 GEM_BANK1_WRITE_4(sc, GEM_MII_DATAPATH_MODE, 345 GEM_MII_DATAPATH_SERDES); 346 GEM_BANK1_BARRIER(sc, GEM_MII_DATAPATH_MODE, 4, 347 BUS_SPACE_BARRIER_WRITE); 348 GEM_BANK1_WRITE_4(sc, GEM_MII_SLINK_CONTROL, 349 GEM_MII_SLINK_LOOPBACK | GEM_MII_SLINK_EN_SYNC_D); 350 GEM_BANK1_BARRIER(sc, GEM_MII_SLINK_CONTROL, 4, 351 BUS_SPACE_BARRIER_WRITE); 352 GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG, GEM_MII_CONFIG_ENABLE); 353 GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4, 354 BUS_SPACE_BARRIER_WRITE); 355 sc->sc_flags |= GEM_SERDES; 356 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 357 gem_mediachange, gem_mediastatus, BMSR_DEFCAPMASK, 358 GEM_PHYAD_EXTERNAL, MII_OFFSET_ANY, MIIF_DOPAUSE); 359 } 360 if (error != 0) { 361 device_printf(sc->sc_dev, "attaching PHYs failed\n"); 362 goto fail_rxd; 363 } 364 sc->sc_mii = device_get_softc(sc->sc_miibus); 365 366 /* 367 * From this point forward, the attachment cannot fail. A failure 368 * before this point releases all resources that may have been 369 * allocated. 370 */ 371 372 /* Get RX FIFO size. */ 373 sc->sc_rxfifosize = 64 * 374 GEM_BANK1_READ_4(sc, GEM_RX_FIFO_SIZE); 375 376 /* Get TX FIFO size. */ 377 v = GEM_BANK1_READ_4(sc, GEM_TX_FIFO_SIZE); 378 device_printf(sc->sc_dev, "%ukB RX FIFO, %ukB TX FIFO\n", 379 sc->sc_rxfifosize / 1024, v / 16); 380 381 /* Attach the interface. */ 382 ether_ifattach(ifp, sc->sc_enaddr); 383 384 /* 385 * Tell the upper layer(s) we support long frames/checksum offloads. 386 */ 387 ifp->if_hdrlen = sizeof(struct ether_vlan_header); 388 ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_HWCSUM; 389 ifp->if_hwassist |= sc->sc_csum_features; 390 ifp->if_capenable |= IFCAP_VLAN_MTU | IFCAP_HWCSUM; 391 392 return (0); 393 394 /* 395 * Free any resources we've allocated during the failed attach 396 * attempt. Do this in reverse order and fall through. 397 */ 398 fail_rxd: 399 for (i = 0; i < GEM_NRXDESC; i++) 400 if (sc->sc_rxsoft[i].rxs_dmamap != NULL) 401 bus_dmamap_destroy(sc->sc_rdmatag, 402 sc->sc_rxsoft[i].rxs_dmamap); 403 fail_txd: 404 for (i = 0; i < GEM_TXQUEUELEN; i++) 405 if (sc->sc_txsoft[i].txs_dmamap != NULL) 406 bus_dmamap_destroy(sc->sc_tdmatag, 407 sc->sc_txsoft[i].txs_dmamap); 408 bus_dmamap_unload(sc->sc_cdmatag, sc->sc_cddmamap); 409 fail_cmem: 410 bus_dmamem_free(sc->sc_cdmatag, sc->sc_control_data, 411 sc->sc_cddmamap); 412 fail_ctag: 413 bus_dma_tag_destroy(sc->sc_cdmatag); 414 fail_ttag: 415 bus_dma_tag_destroy(sc->sc_tdmatag); 416 fail_rtag: 417 bus_dma_tag_destroy(sc->sc_rdmatag); 418 fail_ptag: 419 bus_dma_tag_destroy(sc->sc_pdmatag); 420 fail_ifnet: 421 if_free(ifp); 422 return (error); 423 } 424 425 void 426 gem_detach(struct gem_softc *sc) 427 { 428 struct ifnet *ifp = sc->sc_ifp; 429 int i; 430 431 ether_ifdetach(ifp); 432 GEM_LOCK(sc); 433 gem_stop(ifp, 1); 434 GEM_UNLOCK(sc); 435 callout_drain(&sc->sc_tick_ch); 436 #ifdef GEM_RINT_TIMEOUT 437 callout_drain(&sc->sc_rx_ch); 438 #endif 439 if_free(ifp); 440 device_delete_child(sc->sc_dev, sc->sc_miibus); 441 442 for (i = 0; i < GEM_NRXDESC; i++) 443 if (sc->sc_rxsoft[i].rxs_dmamap != NULL) 444 bus_dmamap_destroy(sc->sc_rdmatag, 445 sc->sc_rxsoft[i].rxs_dmamap); 446 for (i = 0; i < GEM_TXQUEUELEN; i++) 447 if (sc->sc_txsoft[i].txs_dmamap != NULL) 448 bus_dmamap_destroy(sc->sc_tdmatag, 449 sc->sc_txsoft[i].txs_dmamap); 450 GEM_CDSYNC(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 451 bus_dmamap_unload(sc->sc_cdmatag, sc->sc_cddmamap); 452 bus_dmamem_free(sc->sc_cdmatag, sc->sc_control_data, 453 sc->sc_cddmamap); 454 bus_dma_tag_destroy(sc->sc_cdmatag); 455 bus_dma_tag_destroy(sc->sc_tdmatag); 456 bus_dma_tag_destroy(sc->sc_rdmatag); 457 bus_dma_tag_destroy(sc->sc_pdmatag); 458 } 459 460 void 461 gem_suspend(struct gem_softc *sc) 462 { 463 struct ifnet *ifp = sc->sc_ifp; 464 465 GEM_LOCK(sc); 466 gem_stop(ifp, 0); 467 GEM_UNLOCK(sc); 468 } 469 470 void 471 gem_resume(struct gem_softc *sc) 472 { 473 struct ifnet *ifp = sc->sc_ifp; 474 475 GEM_LOCK(sc); 476 /* 477 * On resume all registers have to be initialized again like 478 * after power-on. 479 */ 480 sc->sc_flags &= ~GEM_INITED; 481 if (ifp->if_flags & IFF_UP) 482 gem_init_locked(sc); 483 GEM_UNLOCK(sc); 484 } 485 486 static inline void 487 gem_rxcksum(struct mbuf *m, uint64_t flags) 488 { 489 struct ether_header *eh; 490 struct ip *ip; 491 struct udphdr *uh; 492 uint16_t *opts; 493 int32_t hlen, len, pktlen; 494 uint32_t temp32; 495 uint16_t cksum; 496 497 pktlen = m->m_pkthdr.len; 498 if (pktlen < sizeof(struct ether_header) + sizeof(struct ip)) 499 return; 500 eh = mtod(m, struct ether_header *); 501 if (eh->ether_type != htons(ETHERTYPE_IP)) 502 return; 503 ip = (struct ip *)(eh + 1); 504 if (ip->ip_v != IPVERSION) 505 return; 506 507 hlen = ip->ip_hl << 2; 508 pktlen -= sizeof(struct ether_header); 509 if (hlen < sizeof(struct ip)) 510 return; 511 if (ntohs(ip->ip_len) < hlen) 512 return; 513 if (ntohs(ip->ip_len) != pktlen) 514 return; 515 if (ip->ip_off & htons(IP_MF | IP_OFFMASK)) 516 return; /* Cannot handle fragmented packet. */ 517 518 switch (ip->ip_p) { 519 case IPPROTO_TCP: 520 if (pktlen < (hlen + sizeof(struct tcphdr))) 521 return; 522 break; 523 case IPPROTO_UDP: 524 if (pktlen < (hlen + sizeof(struct udphdr))) 525 return; 526 uh = (struct udphdr *)((uint8_t *)ip + hlen); 527 if (uh->uh_sum == 0) 528 return; /* no checksum */ 529 break; 530 default: 531 return; 532 } 533 534 cksum = ~(flags & GEM_RD_CHECKSUM); 535 /* checksum fixup for IP options */ 536 len = hlen - sizeof(struct ip); 537 if (len > 0) { 538 opts = (uint16_t *)(ip + 1); 539 for (; len > 0; len -= sizeof(uint16_t), opts++) { 540 temp32 = cksum - *opts; 541 temp32 = (temp32 >> 16) + (temp32 & 65535); 542 cksum = temp32 & 65535; 543 } 544 } 545 m->m_pkthdr.csum_flags |= CSUM_DATA_VALID; 546 m->m_pkthdr.csum_data = cksum; 547 } 548 549 static void 550 gem_cddma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 551 { 552 struct gem_softc *sc = xsc; 553 554 if (error != 0) 555 return; 556 if (nsegs != 1) 557 panic("%s: bad control buffer segment count", __func__); 558 sc->sc_cddma = segs[0].ds_addr; 559 } 560 561 static void 562 gem_tick(void *arg) 563 { 564 struct gem_softc *sc = arg; 565 struct ifnet *ifp = sc->sc_ifp; 566 uint32_t v; 567 568 GEM_LOCK_ASSERT(sc, MA_OWNED); 569 570 /* 571 * Unload collision and error counters. 572 */ 573 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 574 GEM_BANK1_READ_4(sc, GEM_MAC_NORM_COLL_CNT) + 575 GEM_BANK1_READ_4(sc, GEM_MAC_FIRST_COLL_CNT)); 576 v = GEM_BANK1_READ_4(sc, GEM_MAC_EXCESS_COLL_CNT) + 577 GEM_BANK1_READ_4(sc, GEM_MAC_LATE_COLL_CNT); 578 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, v); 579 if_inc_counter(ifp, IFCOUNTER_OERRORS, v); 580 if_inc_counter(ifp, IFCOUNTER_IERRORS, 581 GEM_BANK1_READ_4(sc, GEM_MAC_RX_LEN_ERR_CNT) + 582 GEM_BANK1_READ_4(sc, GEM_MAC_RX_ALIGN_ERR) + 583 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CRC_ERR_CNT) + 584 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CODE_VIOL)); 585 586 /* 587 * Then clear the hardware counters. 588 */ 589 GEM_BANK1_WRITE_4(sc, GEM_MAC_NORM_COLL_CNT, 0); 590 GEM_BANK1_WRITE_4(sc, GEM_MAC_FIRST_COLL_CNT, 0); 591 GEM_BANK1_WRITE_4(sc, GEM_MAC_EXCESS_COLL_CNT, 0); 592 GEM_BANK1_WRITE_4(sc, GEM_MAC_LATE_COLL_CNT, 0); 593 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_LEN_ERR_CNT, 0); 594 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_ALIGN_ERR, 0); 595 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CRC_ERR_CNT, 0); 596 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CODE_VIOL, 0); 597 598 mii_tick(sc->sc_mii); 599 600 if (gem_watchdog(sc) == EJUSTRETURN) 601 return; 602 603 callout_reset(&sc->sc_tick_ch, hz, gem_tick, sc); 604 } 605 606 static int 607 gem_bitwait(struct gem_softc *sc, u_int bank, bus_addr_t r, uint32_t clr, 608 uint32_t set) 609 { 610 int i; 611 uint32_t reg; 612 613 for (i = GEM_TRIES; i--; DELAY(100)) { 614 reg = GEM_BANKN_READ_M(bank, 4, sc, r); 615 if ((reg & clr) == 0 && (reg & set) == set) 616 return (1); 617 } 618 return (0); 619 } 620 621 static void 622 gem_reset(struct gem_softc *sc) 623 { 624 625 #ifdef GEM_DEBUG 626 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 627 #endif 628 gem_reset_rx(sc); 629 gem_reset_tx(sc); 630 631 /* Do a full reset. */ 632 GEM_BANK2_WRITE_4(sc, GEM_RESET, GEM_RESET_RX | GEM_RESET_TX | 633 (sc->sc_variant == GEM_SUN_ERI ? GEM_ERI_CACHE_LINE_SIZE << 634 GEM_RESET_CLSZ_SHFT : 0)); 635 GEM_BANK2_BARRIER(sc, GEM_RESET, 4, 636 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 637 if (!GEM_BANK2_BITWAIT(sc, GEM_RESET, GEM_RESET_RX | GEM_RESET_TX, 0)) 638 device_printf(sc->sc_dev, "cannot reset device\n"); 639 } 640 641 static void 642 gem_rxdrain(struct gem_softc *sc) 643 { 644 struct gem_rxsoft *rxs; 645 int i; 646 647 for (i = 0; i < GEM_NRXDESC; i++) { 648 rxs = &sc->sc_rxsoft[i]; 649 if (rxs->rxs_mbuf != NULL) { 650 bus_dmamap_sync(sc->sc_rdmatag, rxs->rxs_dmamap, 651 BUS_DMASYNC_POSTREAD); 652 bus_dmamap_unload(sc->sc_rdmatag, rxs->rxs_dmamap); 653 m_freem(rxs->rxs_mbuf); 654 rxs->rxs_mbuf = NULL; 655 } 656 } 657 } 658 659 static void 660 gem_stop(struct ifnet *ifp, int disable) 661 { 662 struct gem_softc *sc = ifp->if_softc; 663 struct gem_txsoft *txs; 664 665 #ifdef GEM_DEBUG 666 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 667 #endif 668 669 callout_stop(&sc->sc_tick_ch); 670 #ifdef GEM_RINT_TIMEOUT 671 callout_stop(&sc->sc_rx_ch); 672 #endif 673 674 gem_reset_tx(sc); 675 gem_reset_rx(sc); 676 677 /* 678 * Release any queued transmit buffers. 679 */ 680 while ((txs = STAILQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 681 STAILQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 682 if (txs->txs_ndescs != 0) { 683 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 684 BUS_DMASYNC_POSTWRITE); 685 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 686 if (txs->txs_mbuf != NULL) { 687 m_freem(txs->txs_mbuf); 688 txs->txs_mbuf = NULL; 689 } 690 } 691 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 692 } 693 694 if (disable) 695 gem_rxdrain(sc); 696 697 /* 698 * Mark the interface down and cancel the watchdog timer. 699 */ 700 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 701 sc->sc_flags &= ~GEM_LINK; 702 sc->sc_wdog_timer = 0; 703 } 704 705 static int 706 gem_reset_rx(struct gem_softc *sc) 707 { 708 709 /* 710 * Resetting while DMA is in progress can cause a bus hang, so we 711 * disable DMA first. 712 */ 713 (void)gem_disable_rx(sc); 714 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 0); 715 GEM_BANK1_BARRIER(sc, GEM_RX_CONFIG, 4, 716 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 717 if (!GEM_BANK1_BITWAIT(sc, GEM_RX_CONFIG, GEM_RX_CONFIG_RXDMA_EN, 0)) 718 device_printf(sc->sc_dev, "cannot disable RX DMA\n"); 719 720 /* Wait 5ms extra. */ 721 DELAY(5000); 722 723 /* Reset the ERX. */ 724 GEM_BANK2_WRITE_4(sc, GEM_RESET, GEM_RESET_RX | 725 (sc->sc_variant == GEM_SUN_ERI ? GEM_ERI_CACHE_LINE_SIZE << 726 GEM_RESET_CLSZ_SHFT : 0)); 727 GEM_BANK2_BARRIER(sc, GEM_RESET, 4, 728 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 729 if (!GEM_BANK2_BITWAIT(sc, GEM_RESET, GEM_RESET_RX, 0)) { 730 device_printf(sc->sc_dev, "cannot reset receiver\n"); 731 return (1); 732 } 733 734 /* Finally, reset RX MAC. */ 735 GEM_BANK1_WRITE_4(sc, GEM_MAC_RXRESET, 1); 736 GEM_BANK1_BARRIER(sc, GEM_MAC_RXRESET, 4, 737 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 738 if (!GEM_BANK1_BITWAIT(sc, GEM_MAC_RXRESET, 1, 0)) { 739 device_printf(sc->sc_dev, "cannot reset RX MAC\n"); 740 return (1); 741 } 742 743 return (0); 744 } 745 746 /* 747 * Reset the receiver DMA engine. 748 * 749 * Intended to be used in case of GEM_INTR_RX_TAG_ERR, GEM_MAC_RX_OVERFLOW 750 * etc in order to reset the receiver DMA engine only and not do a full 751 * reset which amongst others also downs the link and clears the FIFOs. 752 */ 753 static void 754 gem_reset_rxdma(struct gem_softc *sc) 755 { 756 int i; 757 758 if (gem_reset_rx(sc) != 0) { 759 sc->sc_ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 760 return (gem_init_locked(sc)); 761 } 762 for (i = 0; i < GEM_NRXDESC; i++) 763 if (sc->sc_rxsoft[i].rxs_mbuf != NULL) 764 GEM_UPDATE_RXDESC(sc, i); 765 sc->sc_rxptr = 0; 766 GEM_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 767 768 /* NOTE: we use only 32-bit DMA addresses here. */ 769 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_HI, 0); 770 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_LO, GEM_CDRXADDR(sc, 0)); 771 GEM_BANK1_WRITE_4(sc, GEM_RX_KICK, GEM_NRXDESC - 4); 772 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 773 gem_ringsize(GEM_NRXDESC /* XXX */) | 774 ((ETHER_HDR_LEN + sizeof(struct ip)) << 775 GEM_RX_CONFIG_CXM_START_SHFT) | 776 (GEM_THRSH_1024 << GEM_RX_CONFIG_FIFO_THRS_SHIFT) | 777 (ETHER_ALIGN << GEM_RX_CONFIG_FBOFF_SHFT)); 778 /* Adjusting for the SBus clock probably isn't worth the fuzz. */ 779 GEM_BANK1_WRITE_4(sc, GEM_RX_BLANKING, 780 ((6 * (sc->sc_flags & GEM_PCI66) != 0 ? 2 : 1) << 781 GEM_RX_BLANKING_TIME_SHIFT) | 6); 782 GEM_BANK1_WRITE_4(sc, GEM_RX_PAUSE_THRESH, 783 (3 * sc->sc_rxfifosize / 256) | 784 ((sc->sc_rxfifosize / 256) << 12)); 785 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 786 GEM_BANK1_READ_4(sc, GEM_RX_CONFIG) | GEM_RX_CONFIG_RXDMA_EN); 787 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_MASK, 788 GEM_MAC_RX_DONE | GEM_MAC_RX_FRAME_CNT); 789 /* 790 * Clear the RX filter and reprogram it. This will also set the 791 * current RX MAC configuration and enable it. 792 */ 793 gem_setladrf(sc); 794 } 795 796 static int 797 gem_reset_tx(struct gem_softc *sc) 798 { 799 800 /* 801 * Resetting while DMA is in progress can cause a bus hang, so we 802 * disable DMA first. 803 */ 804 (void)gem_disable_tx(sc); 805 GEM_BANK1_WRITE_4(sc, GEM_TX_CONFIG, 0); 806 GEM_BANK1_BARRIER(sc, GEM_TX_CONFIG, 4, 807 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 808 if (!GEM_BANK1_BITWAIT(sc, GEM_TX_CONFIG, GEM_TX_CONFIG_TXDMA_EN, 0)) 809 device_printf(sc->sc_dev, "cannot disable TX DMA\n"); 810 811 /* Wait 5ms extra. */ 812 DELAY(5000); 813 814 /* Finally, reset the ETX. */ 815 GEM_BANK2_WRITE_4(sc, GEM_RESET, GEM_RESET_TX | 816 (sc->sc_variant == GEM_SUN_ERI ? GEM_ERI_CACHE_LINE_SIZE << 817 GEM_RESET_CLSZ_SHFT : 0)); 818 GEM_BANK2_BARRIER(sc, GEM_RESET, 4, 819 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 820 if (!GEM_BANK2_BITWAIT(sc, GEM_RESET, GEM_RESET_TX, 0)) { 821 device_printf(sc->sc_dev, "cannot reset transmitter\n"); 822 return (1); 823 } 824 return (0); 825 } 826 827 static int 828 gem_disable_rx(struct gem_softc *sc) 829 { 830 831 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, 832 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CONFIG) & ~GEM_MAC_RX_ENABLE); 833 GEM_BANK1_BARRIER(sc, GEM_MAC_RX_CONFIG, 4, 834 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 835 if (GEM_BANK1_BITWAIT(sc, GEM_MAC_RX_CONFIG, GEM_MAC_RX_ENABLE, 0)) 836 return (1); 837 device_printf(sc->sc_dev, "cannot disable RX MAC\n"); 838 return (0); 839 } 840 841 static int 842 gem_disable_tx(struct gem_softc *sc) 843 { 844 845 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, 846 GEM_BANK1_READ_4(sc, GEM_MAC_TX_CONFIG) & ~GEM_MAC_TX_ENABLE); 847 GEM_BANK1_BARRIER(sc, GEM_MAC_TX_CONFIG, 4, 848 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 849 if (GEM_BANK1_BITWAIT(sc, GEM_MAC_TX_CONFIG, GEM_MAC_TX_ENABLE, 0)) 850 return (1); 851 device_printf(sc->sc_dev, "cannot disable TX MAC\n"); 852 return (0); 853 } 854 855 static int 856 gem_meminit(struct gem_softc *sc) 857 { 858 struct gem_rxsoft *rxs; 859 int error, i; 860 861 GEM_LOCK_ASSERT(sc, MA_OWNED); 862 863 /* 864 * Initialize the transmit descriptor ring. 865 */ 866 for (i = 0; i < GEM_NTXDESC; i++) { 867 sc->sc_txdescs[i].gd_flags = 0; 868 sc->sc_txdescs[i].gd_addr = 0; 869 } 870 sc->sc_txfree = GEM_MAXTXFREE; 871 sc->sc_txnext = 0; 872 sc->sc_txwin = 0; 873 874 /* 875 * Initialize the receive descriptor and receive job 876 * descriptor rings. 877 */ 878 for (i = 0; i < GEM_NRXDESC; i++) { 879 rxs = &sc->sc_rxsoft[i]; 880 if (rxs->rxs_mbuf == NULL) { 881 if ((error = gem_add_rxbuf(sc, i)) != 0) { 882 device_printf(sc->sc_dev, 883 "unable to allocate or map RX buffer %d, " 884 "error = %d\n", i, error); 885 /* 886 * XXX we should attempt to run with fewer 887 * receive buffers instead of just failing. 888 */ 889 gem_rxdrain(sc); 890 return (1); 891 } 892 } else 893 GEM_INIT_RXDESC(sc, i); 894 } 895 sc->sc_rxptr = 0; 896 897 GEM_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 898 899 return (0); 900 } 901 902 static u_int 903 gem_ringsize(u_int sz) 904 { 905 906 switch (sz) { 907 case 32: 908 return (GEM_RING_SZ_32); 909 case 64: 910 return (GEM_RING_SZ_64); 911 case 128: 912 return (GEM_RING_SZ_128); 913 case 256: 914 return (GEM_RING_SZ_256); 915 case 512: 916 return (GEM_RING_SZ_512); 917 case 1024: 918 return (GEM_RING_SZ_1024); 919 case 2048: 920 return (GEM_RING_SZ_2048); 921 case 4096: 922 return (GEM_RING_SZ_4096); 923 case 8192: 924 return (GEM_RING_SZ_8192); 925 default: 926 printf("%s: invalid ring size %d\n", __func__, sz); 927 return (GEM_RING_SZ_32); 928 } 929 } 930 931 static void 932 gem_init(void *xsc) 933 { 934 struct gem_softc *sc = xsc; 935 936 GEM_LOCK(sc); 937 gem_init_locked(sc); 938 GEM_UNLOCK(sc); 939 } 940 941 /* 942 * Initialization of interface; set up initialization block 943 * and transmit/receive descriptor rings. 944 */ 945 static void 946 gem_init_locked(struct gem_softc *sc) 947 { 948 struct ifnet *ifp = sc->sc_ifp; 949 uint32_t v; 950 951 GEM_LOCK_ASSERT(sc, MA_OWNED); 952 953 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 954 return; 955 956 #ifdef GEM_DEBUG 957 CTR2(KTR_GEM, "%s: %s: calling stop", device_get_name(sc->sc_dev), 958 __func__); 959 #endif 960 /* 961 * Initialization sequence. The numbered steps below correspond 962 * to the sequence outlined in section 6.3.5.1 in the Ethernet 963 * Channel Engine manual (part of the PCIO manual). 964 * See also the STP2002-STQ document from Sun Microsystems. 965 */ 966 967 /* step 1 & 2. Reset the Ethernet Channel. */ 968 gem_stop(ifp, 0); 969 gem_reset(sc); 970 #ifdef GEM_DEBUG 971 CTR2(KTR_GEM, "%s: %s: restarting", device_get_name(sc->sc_dev), 972 __func__); 973 #endif 974 975 if ((sc->sc_flags & GEM_SERDES) == 0) 976 /* Re-initialize the MIF. */ 977 gem_mifinit(sc); 978 979 /* step 3. Setup data structures in host memory. */ 980 if (gem_meminit(sc) != 0) 981 return; 982 983 /* step 4. TX MAC registers & counters */ 984 gem_init_regs(sc); 985 986 /* step 5. RX MAC registers & counters */ 987 988 /* step 6 & 7. Program Descriptor Ring Base Addresses. */ 989 /* NOTE: we use only 32-bit DMA addresses here. */ 990 GEM_BANK1_WRITE_4(sc, GEM_TX_RING_PTR_HI, 0); 991 GEM_BANK1_WRITE_4(sc, GEM_TX_RING_PTR_LO, GEM_CDTXADDR(sc, 0)); 992 993 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_HI, 0); 994 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_LO, GEM_CDRXADDR(sc, 0)); 995 #ifdef GEM_DEBUG 996 CTR3(KTR_GEM, "loading RX ring %lx, TX ring %lx, cddma %lx", 997 GEM_CDRXADDR(sc, 0), GEM_CDTXADDR(sc, 0), sc->sc_cddma); 998 #endif 999 1000 /* step 8. Global Configuration & Interrupt Mask */ 1001 1002 /* 1003 * Set the internal arbitration to "infinite" bursts of the 1004 * maximum length of 31 * 64 bytes so DMA transfers aren't 1005 * split up in cache line size chunks. This greatly improves 1006 * RX performance. 1007 * Enable silicon bug workarounds for the Apple variants. 1008 */ 1009 GEM_BANK1_WRITE_4(sc, GEM_CONFIG, 1010 GEM_CONFIG_TXDMA_LIMIT | GEM_CONFIG_RXDMA_LIMIT | 1011 ((sc->sc_flags & GEM_PCI) != 0 ? GEM_CONFIG_BURST_INF : 1012 GEM_CONFIG_BURST_64) | (GEM_IS_APPLE(sc) ? 1013 GEM_CONFIG_RONPAULBIT | GEM_CONFIG_BUG2FIX : 0)); 1014 1015 GEM_BANK1_WRITE_4(sc, GEM_INTMASK, 1016 ~(GEM_INTR_TX_INTME | GEM_INTR_TX_EMPTY | GEM_INTR_RX_DONE | 1017 GEM_INTR_RX_NOBUF | GEM_INTR_RX_TAG_ERR | GEM_INTR_PERR | 1018 GEM_INTR_BERR 1019 #ifdef GEM_DEBUG 1020 | GEM_INTR_PCS | GEM_INTR_MIF 1021 #endif 1022 )); 1023 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_MASK, 1024 GEM_MAC_RX_DONE | GEM_MAC_RX_FRAME_CNT); 1025 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_MASK, 1026 GEM_MAC_TX_XMIT_DONE | GEM_MAC_TX_DEFER_EXP | 1027 GEM_MAC_TX_PEAK_EXP); 1028 #ifdef GEM_DEBUG 1029 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_MASK, 1030 ~(GEM_MAC_PAUSED | GEM_MAC_PAUSE | GEM_MAC_RESUME)); 1031 #else 1032 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_MASK, 1033 GEM_MAC_PAUSED | GEM_MAC_PAUSE | GEM_MAC_RESUME); 1034 #endif 1035 1036 /* step 9. ETX Configuration: use mostly default values. */ 1037 1038 /* Enable DMA. */ 1039 v = gem_ringsize(GEM_NTXDESC); 1040 /* Set TX FIFO threshold and enable DMA. */ 1041 v |= ((sc->sc_variant == GEM_SUN_ERI ? 0x100 : 0x4ff) << 10) & 1042 GEM_TX_CONFIG_TXFIFO_TH; 1043 GEM_BANK1_WRITE_4(sc, GEM_TX_CONFIG, v | GEM_TX_CONFIG_TXDMA_EN); 1044 1045 /* step 10. ERX Configuration */ 1046 1047 /* Encode Receive Descriptor ring size. */ 1048 v = gem_ringsize(GEM_NRXDESC /* XXX */); 1049 /* RX TCP/UDP checksum offset */ 1050 v |= ((ETHER_HDR_LEN + sizeof(struct ip)) << 1051 GEM_RX_CONFIG_CXM_START_SHFT); 1052 /* Set RX FIFO threshold, set first byte offset and enable DMA. */ 1053 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 1054 v | (GEM_THRSH_1024 << GEM_RX_CONFIG_FIFO_THRS_SHIFT) | 1055 (ETHER_ALIGN << GEM_RX_CONFIG_FBOFF_SHFT) | 1056 GEM_RX_CONFIG_RXDMA_EN); 1057 1058 /* Adjusting for the SBus clock probably isn't worth the fuzz. */ 1059 GEM_BANK1_WRITE_4(sc, GEM_RX_BLANKING, 1060 ((6 * (sc->sc_flags & GEM_PCI66) != 0 ? 2 : 1) << 1061 GEM_RX_BLANKING_TIME_SHIFT) | 6); 1062 1063 /* 1064 * The following value is for an OFF Threshold of about 3/4 full 1065 * and an ON Threshold of 1/4 full. 1066 */ 1067 GEM_BANK1_WRITE_4(sc, GEM_RX_PAUSE_THRESH, 1068 (3 * sc->sc_rxfifosize / 256) | 1069 ((sc->sc_rxfifosize / 256) << 12)); 1070 1071 /* step 11. Configure Media. */ 1072 1073 /* step 12. RX_MAC Configuration Register */ 1074 v = GEM_BANK1_READ_4(sc, GEM_MAC_RX_CONFIG); 1075 v &= ~GEM_MAC_RX_ENABLE; 1076 v |= GEM_MAC_RX_STRIP_CRC; 1077 sc->sc_mac_rxcfg = v; 1078 /* 1079 * Clear the RX filter and reprogram it. This will also set the 1080 * current RX MAC configuration and enable it. 1081 */ 1082 gem_setladrf(sc); 1083 1084 /* step 13. TX_MAC Configuration Register */ 1085 v = GEM_BANK1_READ_4(sc, GEM_MAC_TX_CONFIG); 1086 v |= GEM_MAC_TX_ENABLE; 1087 (void)gem_disable_tx(sc); 1088 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, v); 1089 1090 /* step 14. Issue Transmit Pending command. */ 1091 1092 /* step 15. Give the receiver a swift kick. */ 1093 GEM_BANK1_WRITE_4(sc, GEM_RX_KICK, GEM_NRXDESC - 4); 1094 1095 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1096 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1097 1098 mii_mediachg(sc->sc_mii); 1099 1100 /* Start the one second timer. */ 1101 sc->sc_wdog_timer = 0; 1102 callout_reset(&sc->sc_tick_ch, hz, gem_tick, sc); 1103 } 1104 1105 static int 1106 gem_load_txmbuf(struct gem_softc *sc, struct mbuf **m_head) 1107 { 1108 bus_dma_segment_t txsegs[GEM_NTXSEGS]; 1109 struct gem_txsoft *txs; 1110 struct ip *ip; 1111 struct mbuf *m; 1112 uint64_t cflags, flags; 1113 int error, nexttx, nsegs, offset, seg; 1114 1115 GEM_LOCK_ASSERT(sc, MA_OWNED); 1116 1117 /* Get a work queue entry. */ 1118 if ((txs = STAILQ_FIRST(&sc->sc_txfreeq)) == NULL) { 1119 /* Ran out of descriptors. */ 1120 return (ENOBUFS); 1121 } 1122 1123 cflags = 0; 1124 if (((*m_head)->m_pkthdr.csum_flags & sc->sc_csum_features) != 0) { 1125 if (M_WRITABLE(*m_head) == 0) { 1126 m = m_dup(*m_head, M_NOWAIT); 1127 m_freem(*m_head); 1128 *m_head = m; 1129 if (m == NULL) 1130 return (ENOBUFS); 1131 } 1132 offset = sizeof(struct ether_header); 1133 m = m_pullup(*m_head, offset + sizeof(struct ip)); 1134 if (m == NULL) { 1135 *m_head = NULL; 1136 return (ENOBUFS); 1137 } 1138 ip = (struct ip *)(mtod(m, caddr_t) + offset); 1139 offset += (ip->ip_hl << 2); 1140 cflags = offset << GEM_TD_CXSUM_STARTSHFT | 1141 ((offset + m->m_pkthdr.csum_data) << 1142 GEM_TD_CXSUM_STUFFSHFT) | GEM_TD_CXSUM_ENABLE; 1143 *m_head = m; 1144 } 1145 1146 error = bus_dmamap_load_mbuf_sg(sc->sc_tdmatag, txs->txs_dmamap, 1147 *m_head, txsegs, &nsegs, BUS_DMA_NOWAIT); 1148 if (error == EFBIG) { 1149 m = m_collapse(*m_head, M_NOWAIT, GEM_NTXSEGS); 1150 if (m == NULL) { 1151 m_freem(*m_head); 1152 *m_head = NULL; 1153 return (ENOBUFS); 1154 } 1155 *m_head = m; 1156 error = bus_dmamap_load_mbuf_sg(sc->sc_tdmatag, 1157 txs->txs_dmamap, *m_head, txsegs, &nsegs, 1158 BUS_DMA_NOWAIT); 1159 if (error != 0) { 1160 m_freem(*m_head); 1161 *m_head = NULL; 1162 return (error); 1163 } 1164 } else if (error != 0) 1165 return (error); 1166 /* If nsegs is wrong then the stack is corrupt. */ 1167 KASSERT(nsegs <= GEM_NTXSEGS, 1168 ("%s: too many DMA segments (%d)", __func__, nsegs)); 1169 if (nsegs == 0) { 1170 m_freem(*m_head); 1171 *m_head = NULL; 1172 return (EIO); 1173 } 1174 1175 /* 1176 * Ensure we have enough descriptors free to describe 1177 * the packet. Note, we always reserve one descriptor 1178 * at the end of the ring as a termination point, in 1179 * order to prevent wrap-around. 1180 */ 1181 if (nsegs > sc->sc_txfree - 1) { 1182 txs->txs_ndescs = 0; 1183 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 1184 return (ENOBUFS); 1185 } 1186 1187 txs->txs_ndescs = nsegs; 1188 txs->txs_firstdesc = sc->sc_txnext; 1189 nexttx = txs->txs_firstdesc; 1190 for (seg = 0; seg < nsegs; seg++, nexttx = GEM_NEXTTX(nexttx)) { 1191 #ifdef GEM_DEBUG 1192 CTR6(KTR_GEM, 1193 "%s: mapping seg %d (txd %d), len %lx, addr %#lx (%#lx)", 1194 __func__, seg, nexttx, txsegs[seg].ds_len, 1195 txsegs[seg].ds_addr, 1196 GEM_DMA_WRITE(sc, txsegs[seg].ds_addr)); 1197 #endif 1198 sc->sc_txdescs[nexttx].gd_addr = 1199 GEM_DMA_WRITE(sc, txsegs[seg].ds_addr); 1200 KASSERT(txsegs[seg].ds_len < GEM_TD_BUFSIZE, 1201 ("%s: segment size too large!", __func__)); 1202 flags = txsegs[seg].ds_len & GEM_TD_BUFSIZE; 1203 sc->sc_txdescs[nexttx].gd_flags = 1204 GEM_DMA_WRITE(sc, flags | cflags); 1205 txs->txs_lastdesc = nexttx; 1206 } 1207 1208 /* Set EOP on the last descriptor. */ 1209 #ifdef GEM_DEBUG 1210 CTR3(KTR_GEM, "%s: end of packet at segment %d, TX %d", 1211 __func__, seg, nexttx); 1212 #endif 1213 sc->sc_txdescs[txs->txs_lastdesc].gd_flags |= 1214 GEM_DMA_WRITE(sc, GEM_TD_END_OF_PACKET); 1215 1216 /* Lastly set SOP on the first descriptor. */ 1217 #ifdef GEM_DEBUG 1218 CTR3(KTR_GEM, "%s: start of packet at segment %d, TX %d", 1219 __func__, seg, nexttx); 1220 #endif 1221 if (++sc->sc_txwin > GEM_NTXSEGS * 2 / 3) { 1222 sc->sc_txwin = 0; 1223 sc->sc_txdescs[txs->txs_firstdesc].gd_flags |= 1224 GEM_DMA_WRITE(sc, GEM_TD_INTERRUPT_ME | 1225 GEM_TD_START_OF_PACKET); 1226 } else 1227 sc->sc_txdescs[txs->txs_firstdesc].gd_flags |= 1228 GEM_DMA_WRITE(sc, GEM_TD_START_OF_PACKET); 1229 1230 /* Sync the DMA map. */ 1231 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 1232 BUS_DMASYNC_PREWRITE); 1233 1234 #ifdef GEM_DEBUG 1235 CTR4(KTR_GEM, "%s: setting firstdesc=%d, lastdesc=%d, ndescs=%d", 1236 __func__, txs->txs_firstdesc, txs->txs_lastdesc, 1237 txs->txs_ndescs); 1238 #endif 1239 STAILQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q); 1240 STAILQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); 1241 txs->txs_mbuf = *m_head; 1242 1243 sc->sc_txnext = GEM_NEXTTX(txs->txs_lastdesc); 1244 sc->sc_txfree -= txs->txs_ndescs; 1245 1246 return (0); 1247 } 1248 1249 static void 1250 gem_init_regs(struct gem_softc *sc) 1251 { 1252 const u_char *laddr = IF_LLADDR(sc->sc_ifp); 1253 1254 GEM_LOCK_ASSERT(sc, MA_OWNED); 1255 1256 /* These registers are not cleared on reset. */ 1257 if ((sc->sc_flags & GEM_INITED) == 0) { 1258 /* magic values */ 1259 GEM_BANK1_WRITE_4(sc, GEM_MAC_IPG0, 0); 1260 GEM_BANK1_WRITE_4(sc, GEM_MAC_IPG1, 8); 1261 GEM_BANK1_WRITE_4(sc, GEM_MAC_IPG2, 4); 1262 1263 /* min frame length */ 1264 GEM_BANK1_WRITE_4(sc, GEM_MAC_MAC_MIN_FRAME, ETHER_MIN_LEN); 1265 /* max frame length and max burst size */ 1266 GEM_BANK1_WRITE_4(sc, GEM_MAC_MAC_MAX_FRAME, 1267 (ETHER_MAX_LEN + ETHER_VLAN_ENCAP_LEN) | (0x2000 << 16)); 1268 1269 /* more magic values */ 1270 GEM_BANK1_WRITE_4(sc, GEM_MAC_PREAMBLE_LEN, 0x7); 1271 GEM_BANK1_WRITE_4(sc, GEM_MAC_JAM_SIZE, 0x4); 1272 GEM_BANK1_WRITE_4(sc, GEM_MAC_ATTEMPT_LIMIT, 0x10); 1273 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_TYPE, 0x8808); 1274 1275 /* random number seed */ 1276 GEM_BANK1_WRITE_4(sc, GEM_MAC_RANDOM_SEED, 1277 ((laddr[5] << 8) | laddr[4]) & 0x3ff); 1278 1279 /* secondary MAC address: 0:0:0:0:0:0 */ 1280 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR3, 0); 1281 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR4, 0); 1282 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR5, 0); 1283 1284 /* MAC control address: 01:80:c2:00:00:01 */ 1285 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR6, 0x0001); 1286 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR7, 0xc200); 1287 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR8, 0x0180); 1288 1289 /* MAC filter address: 0:0:0:0:0:0 */ 1290 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR_FILTER0, 0); 1291 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR_FILTER1, 0); 1292 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR_FILTER2, 0); 1293 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADR_FLT_MASK1_2, 0); 1294 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADR_FLT_MASK0, 0); 1295 1296 sc->sc_flags |= GEM_INITED; 1297 } 1298 1299 /* Counters need to be zeroed. */ 1300 GEM_BANK1_WRITE_4(sc, GEM_MAC_NORM_COLL_CNT, 0); 1301 GEM_BANK1_WRITE_4(sc, GEM_MAC_FIRST_COLL_CNT, 0); 1302 GEM_BANK1_WRITE_4(sc, GEM_MAC_EXCESS_COLL_CNT, 0); 1303 GEM_BANK1_WRITE_4(sc, GEM_MAC_LATE_COLL_CNT, 0); 1304 GEM_BANK1_WRITE_4(sc, GEM_MAC_DEFER_TMR_CNT, 0); 1305 GEM_BANK1_WRITE_4(sc, GEM_MAC_PEAK_ATTEMPTS, 0); 1306 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_FRAME_COUNT, 0); 1307 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_LEN_ERR_CNT, 0); 1308 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_ALIGN_ERR, 0); 1309 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CRC_ERR_CNT, 0); 1310 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CODE_VIOL, 0); 1311 1312 /* Set XOFF PAUSE time. */ 1313 GEM_BANK1_WRITE_4(sc, GEM_MAC_SEND_PAUSE_CMD, 0x1BF0); 1314 1315 /* Set the station address. */ 1316 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR0, (laddr[4] << 8) | laddr[5]); 1317 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR1, (laddr[2] << 8) | laddr[3]); 1318 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR2, (laddr[0] << 8) | laddr[1]); 1319 1320 /* Enable MII outputs. */ 1321 GEM_BANK1_WRITE_4(sc, GEM_MAC_XIF_CONFIG, GEM_MAC_XIF_TX_MII_ENA); 1322 } 1323 1324 static void 1325 gem_start(struct ifnet *ifp) 1326 { 1327 struct gem_softc *sc = ifp->if_softc; 1328 1329 GEM_LOCK(sc); 1330 gem_start_locked(ifp); 1331 GEM_UNLOCK(sc); 1332 } 1333 1334 static inline void 1335 gem_txkick(struct gem_softc *sc) 1336 { 1337 1338 /* 1339 * Update the TX kick register. This register has to point to the 1340 * descriptor after the last valid one and for optimum performance 1341 * should be incremented in multiples of 4 (the DMA engine fetches/ 1342 * updates descriptors in batches of 4). 1343 */ 1344 #ifdef GEM_DEBUG 1345 CTR3(KTR_GEM, "%s: %s: kicking TX %d", 1346 device_get_name(sc->sc_dev), __func__, sc->sc_txnext); 1347 #endif 1348 GEM_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1349 GEM_BANK1_WRITE_4(sc, GEM_TX_KICK, sc->sc_txnext); 1350 } 1351 1352 static void 1353 gem_start_locked(struct ifnet *ifp) 1354 { 1355 struct gem_softc *sc = ifp->if_softc; 1356 struct mbuf *m; 1357 int kicked, ntx; 1358 1359 GEM_LOCK_ASSERT(sc, MA_OWNED); 1360 1361 if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != 1362 IFF_DRV_RUNNING || (sc->sc_flags & GEM_LINK) == 0) 1363 return; 1364 1365 #ifdef GEM_DEBUG 1366 CTR4(KTR_GEM, "%s: %s: txfree %d, txnext %d", 1367 device_get_name(sc->sc_dev), __func__, sc->sc_txfree, 1368 sc->sc_txnext); 1369 #endif 1370 ntx = 0; 1371 kicked = 0; 1372 for (; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) && sc->sc_txfree > 1;) { 1373 IFQ_DRV_DEQUEUE(&ifp->if_snd, m); 1374 if (m == NULL) 1375 break; 1376 if (gem_load_txmbuf(sc, &m) != 0) { 1377 if (m == NULL) 1378 break; 1379 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1380 IFQ_DRV_PREPEND(&ifp->if_snd, m); 1381 break; 1382 } 1383 if ((sc->sc_txnext % 4) == 0) { 1384 gem_txkick(sc); 1385 kicked = 1; 1386 } else 1387 kicked = 0; 1388 ntx++; 1389 BPF_MTAP(ifp, m); 1390 } 1391 1392 if (ntx > 0) { 1393 if (kicked == 0) 1394 gem_txkick(sc); 1395 #ifdef GEM_DEBUG 1396 CTR2(KTR_GEM, "%s: packets enqueued, OWN on %d", 1397 device_get_name(sc->sc_dev), sc->sc_txnext); 1398 #endif 1399 1400 /* Set a watchdog timer in case the chip flakes out. */ 1401 sc->sc_wdog_timer = 5; 1402 #ifdef GEM_DEBUG 1403 CTR3(KTR_GEM, "%s: %s: watchdog %d", 1404 device_get_name(sc->sc_dev), __func__, 1405 sc->sc_wdog_timer); 1406 #endif 1407 } 1408 } 1409 1410 static void 1411 gem_tint(struct gem_softc *sc) 1412 { 1413 struct ifnet *ifp = sc->sc_ifp; 1414 struct gem_txsoft *txs; 1415 int progress; 1416 uint32_t txlast; 1417 #ifdef GEM_DEBUG 1418 int i; 1419 1420 GEM_LOCK_ASSERT(sc, MA_OWNED); 1421 1422 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 1423 #endif 1424 1425 /* 1426 * Go through our TX list and free mbufs for those 1427 * frames that have been transmitted. 1428 */ 1429 progress = 0; 1430 GEM_CDSYNC(sc, BUS_DMASYNC_POSTREAD); 1431 while ((txs = STAILQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 1432 #ifdef GEM_DEBUG 1433 if ((ifp->if_flags & IFF_DEBUG) != 0) { 1434 printf(" txsoft %p transmit chain:\n", txs); 1435 for (i = txs->txs_firstdesc;; i = GEM_NEXTTX(i)) { 1436 printf("descriptor %d: ", i); 1437 printf("gd_flags: 0x%016llx\t", 1438 (long long)GEM_DMA_READ(sc, 1439 sc->sc_txdescs[i].gd_flags)); 1440 printf("gd_addr: 0x%016llx\n", 1441 (long long)GEM_DMA_READ(sc, 1442 sc->sc_txdescs[i].gd_addr)); 1443 if (i == txs->txs_lastdesc) 1444 break; 1445 } 1446 } 1447 #endif 1448 1449 /* 1450 * In theory, we could harvest some descriptors before 1451 * the ring is empty, but that's a bit complicated. 1452 * 1453 * GEM_TX_COMPLETION points to the last descriptor 1454 * processed + 1. 1455 */ 1456 txlast = GEM_BANK1_READ_4(sc, GEM_TX_COMPLETION); 1457 #ifdef GEM_DEBUG 1458 CTR4(KTR_GEM, "%s: txs->txs_firstdesc = %d, " 1459 "txs->txs_lastdesc = %d, txlast = %d", 1460 __func__, txs->txs_firstdesc, txs->txs_lastdesc, txlast); 1461 #endif 1462 if (txs->txs_firstdesc <= txs->txs_lastdesc) { 1463 if ((txlast >= txs->txs_firstdesc) && 1464 (txlast <= txs->txs_lastdesc)) 1465 break; 1466 } else { 1467 /* Ick -- this command wraps. */ 1468 if ((txlast >= txs->txs_firstdesc) || 1469 (txlast <= txs->txs_lastdesc)) 1470 break; 1471 } 1472 1473 #ifdef GEM_DEBUG 1474 CTR1(KTR_GEM, "%s: releasing a descriptor", __func__); 1475 #endif 1476 STAILQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 1477 1478 sc->sc_txfree += txs->txs_ndescs; 1479 1480 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 1481 BUS_DMASYNC_POSTWRITE); 1482 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 1483 if (txs->txs_mbuf != NULL) { 1484 m_freem(txs->txs_mbuf); 1485 txs->txs_mbuf = NULL; 1486 } 1487 1488 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 1489 1490 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1491 progress = 1; 1492 } 1493 1494 #ifdef GEM_DEBUG 1495 CTR4(KTR_GEM, "%s: GEM_TX_STATE_MACHINE %x GEM_TX_DATA_PTR %llx " 1496 "GEM_TX_COMPLETION %x", 1497 __func__, GEM_BANK1_READ_4(sc, GEM_TX_STATE_MACHINE), 1498 ((long long)GEM_BANK1_READ_4(sc, GEM_TX_DATA_PTR_HI) << 32) | 1499 GEM_BANK1_READ_4(sc, GEM_TX_DATA_PTR_LO), 1500 GEM_BANK1_READ_4(sc, GEM_TX_COMPLETION)); 1501 #endif 1502 1503 if (progress) { 1504 if (sc->sc_txfree == GEM_NTXDESC - 1) 1505 sc->sc_txwin = 0; 1506 1507 /* 1508 * We freed some descriptors, so reset IFF_DRV_OACTIVE 1509 * and restart. 1510 */ 1511 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1512 if (STAILQ_EMPTY(&sc->sc_txdirtyq)) 1513 sc->sc_wdog_timer = 0; 1514 gem_start_locked(ifp); 1515 } 1516 1517 #ifdef GEM_DEBUG 1518 CTR3(KTR_GEM, "%s: %s: watchdog %d", 1519 device_get_name(sc->sc_dev), __func__, sc->sc_wdog_timer); 1520 #endif 1521 } 1522 1523 #ifdef GEM_RINT_TIMEOUT 1524 static void 1525 gem_rint_timeout(void *arg) 1526 { 1527 struct gem_softc *sc = arg; 1528 1529 GEM_LOCK_ASSERT(sc, MA_OWNED); 1530 1531 gem_rint(sc); 1532 } 1533 #endif 1534 1535 static void 1536 gem_rint(struct gem_softc *sc) 1537 { 1538 struct ifnet *ifp = sc->sc_ifp; 1539 struct mbuf *m; 1540 uint64_t rxstat; 1541 uint32_t rxcomp; 1542 1543 GEM_LOCK_ASSERT(sc, MA_OWNED); 1544 1545 #ifdef GEM_RINT_TIMEOUT 1546 callout_stop(&sc->sc_rx_ch); 1547 #endif 1548 #ifdef GEM_DEBUG 1549 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 1550 #endif 1551 1552 /* 1553 * Read the completion register once. This limits 1554 * how long the following loop can execute. 1555 */ 1556 rxcomp = GEM_BANK1_READ_4(sc, GEM_RX_COMPLETION); 1557 #ifdef GEM_DEBUG 1558 CTR3(KTR_GEM, "%s: sc->sc_rxptr %d, complete %d", 1559 __func__, sc->sc_rxptr, rxcomp); 1560 #endif 1561 GEM_CDSYNC(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1562 for (; sc->sc_rxptr != rxcomp;) { 1563 m = sc->sc_rxsoft[sc->sc_rxptr].rxs_mbuf; 1564 rxstat = GEM_DMA_READ(sc, 1565 sc->sc_rxdescs[sc->sc_rxptr].gd_flags); 1566 1567 if (rxstat & GEM_RD_OWN) { 1568 #ifdef GEM_RINT_TIMEOUT 1569 /* 1570 * The descriptor is still marked as owned, although 1571 * it is supposed to have completed. This has been 1572 * observed on some machines. Just exiting here 1573 * might leave the packet sitting around until another 1574 * one arrives to trigger a new interrupt, which is 1575 * generally undesirable, so set up a timeout. 1576 */ 1577 callout_reset(&sc->sc_rx_ch, GEM_RXOWN_TICKS, 1578 gem_rint_timeout, sc); 1579 #endif 1580 m = NULL; 1581 goto kickit; 1582 } 1583 1584 if (rxstat & GEM_RD_BAD_CRC) { 1585 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1586 device_printf(sc->sc_dev, "receive error: CRC error\n"); 1587 GEM_INIT_RXDESC(sc, sc->sc_rxptr); 1588 m = NULL; 1589 goto kickit; 1590 } 1591 1592 #ifdef GEM_DEBUG 1593 if ((ifp->if_flags & IFF_DEBUG) != 0) { 1594 printf(" rxsoft %p descriptor %d: ", 1595 &sc->sc_rxsoft[sc->sc_rxptr], sc->sc_rxptr); 1596 printf("gd_flags: 0x%016llx\t", 1597 (long long)GEM_DMA_READ(sc, 1598 sc->sc_rxdescs[sc->sc_rxptr].gd_flags)); 1599 printf("gd_addr: 0x%016llx\n", 1600 (long long)GEM_DMA_READ(sc, 1601 sc->sc_rxdescs[sc->sc_rxptr].gd_addr)); 1602 } 1603 #endif 1604 1605 /* 1606 * Allocate a new mbuf cluster. If that fails, we are 1607 * out of memory, and must drop the packet and recycle 1608 * the buffer that's already attached to this descriptor. 1609 */ 1610 if (gem_add_rxbuf(sc, sc->sc_rxptr) != 0) { 1611 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 1612 GEM_INIT_RXDESC(sc, sc->sc_rxptr); 1613 m = NULL; 1614 } 1615 1616 kickit: 1617 /* 1618 * Update the RX kick register. This register has to point 1619 * to the descriptor after the last valid one (before the 1620 * current batch) and for optimum performance should be 1621 * incremented in multiples of 4 (the DMA engine fetches/ 1622 * updates descriptors in batches of 4). 1623 */ 1624 sc->sc_rxptr = GEM_NEXTRX(sc->sc_rxptr); 1625 if ((sc->sc_rxptr % 4) == 0) { 1626 GEM_CDSYNC(sc, 1627 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1628 GEM_BANK1_WRITE_4(sc, GEM_RX_KICK, 1629 (sc->sc_rxptr + GEM_NRXDESC - 4) & 1630 GEM_NRXDESC_MASK); 1631 } 1632 1633 if (m == NULL) { 1634 if (rxstat & GEM_RD_OWN) 1635 break; 1636 continue; 1637 } 1638 1639 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 1640 m->m_data += ETHER_ALIGN; /* first byte offset */ 1641 m->m_pkthdr.rcvif = ifp; 1642 m->m_pkthdr.len = m->m_len = GEM_RD_BUFLEN(rxstat); 1643 1644 if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) 1645 gem_rxcksum(m, rxstat); 1646 1647 /* Pass it on. */ 1648 GEM_UNLOCK(sc); 1649 (*ifp->if_input)(ifp, m); 1650 GEM_LOCK(sc); 1651 } 1652 1653 #ifdef GEM_DEBUG 1654 CTR3(KTR_GEM, "%s: done sc->sc_rxptr %d, complete %d", __func__, 1655 sc->sc_rxptr, GEM_BANK1_READ_4(sc, GEM_RX_COMPLETION)); 1656 #endif 1657 } 1658 1659 static int 1660 gem_add_rxbuf(struct gem_softc *sc, int idx) 1661 { 1662 struct gem_rxsoft *rxs = &sc->sc_rxsoft[idx]; 1663 struct mbuf *m; 1664 bus_dma_segment_t segs[1]; 1665 int error, nsegs; 1666 1667 GEM_LOCK_ASSERT(sc, MA_OWNED); 1668 1669 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1670 if (m == NULL) 1671 return (ENOBUFS); 1672 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 1673 1674 #ifdef GEM_DEBUG 1675 /* Bzero the packet to check DMA. */ 1676 memset(m->m_ext.ext_buf, 0, m->m_ext.ext_size); 1677 #endif 1678 1679 if (rxs->rxs_mbuf != NULL) { 1680 bus_dmamap_sync(sc->sc_rdmatag, rxs->rxs_dmamap, 1681 BUS_DMASYNC_POSTREAD); 1682 bus_dmamap_unload(sc->sc_rdmatag, rxs->rxs_dmamap); 1683 } 1684 1685 error = bus_dmamap_load_mbuf_sg(sc->sc_rdmatag, rxs->rxs_dmamap, 1686 m, segs, &nsegs, BUS_DMA_NOWAIT); 1687 if (error != 0) { 1688 device_printf(sc->sc_dev, 1689 "cannot load RS DMA map %d, error = %d\n", idx, error); 1690 m_freem(m); 1691 return (error); 1692 } 1693 /* If nsegs is wrong then the stack is corrupt. */ 1694 KASSERT(nsegs == 1, 1695 ("%s: too many DMA segments (%d)", __func__, nsegs)); 1696 rxs->rxs_mbuf = m; 1697 rxs->rxs_paddr = segs[0].ds_addr; 1698 1699 bus_dmamap_sync(sc->sc_rdmatag, rxs->rxs_dmamap, 1700 BUS_DMASYNC_PREREAD); 1701 1702 GEM_INIT_RXDESC(sc, idx); 1703 1704 return (0); 1705 } 1706 1707 static void 1708 gem_eint(struct gem_softc *sc, u_int status) 1709 { 1710 1711 if_inc_counter(sc->sc_ifp, IFCOUNTER_IERRORS, 1); 1712 if ((status & GEM_INTR_RX_TAG_ERR) != 0) { 1713 gem_reset_rxdma(sc); 1714 return; 1715 } 1716 1717 device_printf(sc->sc_dev, "%s: status 0x%x", __func__, status); 1718 if ((status & GEM_INTR_BERR) != 0) { 1719 if ((sc->sc_flags & GEM_PCI) != 0) 1720 printf(", PCI bus error 0x%x\n", 1721 GEM_BANK1_READ_4(sc, GEM_PCI_ERROR_STATUS)); 1722 else 1723 printf(", SBus error 0x%x\n", 1724 GEM_BANK1_READ_4(sc, GEM_SBUS_STATUS)); 1725 } 1726 } 1727 1728 void 1729 gem_intr(void *v) 1730 { 1731 struct gem_softc *sc = v; 1732 uint32_t status, status2; 1733 1734 GEM_LOCK(sc); 1735 status = GEM_BANK1_READ_4(sc, GEM_STATUS); 1736 1737 #ifdef GEM_DEBUG 1738 CTR4(KTR_GEM, "%s: %s: cplt %x, status %x", 1739 device_get_name(sc->sc_dev), __func__, 1740 (status >> GEM_STATUS_TX_COMPLETION_SHFT), (u_int)status); 1741 1742 /* 1743 * PCS interrupts must be cleared, otherwise no traffic is passed! 1744 */ 1745 if ((status & GEM_INTR_PCS) != 0) { 1746 status2 = 1747 GEM_BANK1_READ_4(sc, GEM_MII_INTERRUP_STATUS) | 1748 GEM_BANK1_READ_4(sc, GEM_MII_INTERRUP_STATUS); 1749 if ((status2 & GEM_MII_INTERRUP_LINK) != 0) 1750 device_printf(sc->sc_dev, 1751 "%s: PCS link status changed\n", __func__); 1752 } 1753 if ((status & GEM_MAC_CONTROL_STATUS) != 0) { 1754 status2 = GEM_BANK1_READ_4(sc, GEM_MAC_CONTROL_STATUS); 1755 if ((status2 & GEM_MAC_PAUSED) != 0) 1756 device_printf(sc->sc_dev, 1757 "%s: PAUSE received (PAUSE time %d slots)\n", 1758 __func__, GEM_MAC_PAUSE_TIME(status2)); 1759 if ((status2 & GEM_MAC_PAUSE) != 0) 1760 device_printf(sc->sc_dev, 1761 "%s: transited to PAUSE state\n", __func__); 1762 if ((status2 & GEM_MAC_RESUME) != 0) 1763 device_printf(sc->sc_dev, 1764 "%s: transited to non-PAUSE state\n", __func__); 1765 } 1766 if ((status & GEM_INTR_MIF) != 0) 1767 device_printf(sc->sc_dev, "%s: MIF interrupt\n", __func__); 1768 #endif 1769 1770 if (__predict_false(status & 1771 (GEM_INTR_RX_TAG_ERR | GEM_INTR_PERR | GEM_INTR_BERR)) != 0) 1772 gem_eint(sc, status); 1773 1774 if ((status & (GEM_INTR_RX_DONE | GEM_INTR_RX_NOBUF)) != 0) 1775 gem_rint(sc); 1776 1777 if ((status & (GEM_INTR_TX_EMPTY | GEM_INTR_TX_INTME)) != 0) 1778 gem_tint(sc); 1779 1780 if (__predict_false((status & GEM_INTR_TX_MAC) != 0)) { 1781 status2 = GEM_BANK1_READ_4(sc, GEM_MAC_TX_STATUS); 1782 if ((status2 & 1783 ~(GEM_MAC_TX_XMIT_DONE | GEM_MAC_TX_DEFER_EXP | 1784 GEM_MAC_TX_PEAK_EXP)) != 0) 1785 device_printf(sc->sc_dev, 1786 "MAC TX fault, status %x\n", status2); 1787 if ((status2 & 1788 (GEM_MAC_TX_UNDERRUN | GEM_MAC_TX_PKT_TOO_LONG)) != 0) { 1789 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 1790 sc->sc_ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1791 gem_init_locked(sc); 1792 } 1793 } 1794 if (__predict_false((status & GEM_INTR_RX_MAC) != 0)) { 1795 status2 = GEM_BANK1_READ_4(sc, GEM_MAC_RX_STATUS); 1796 /* 1797 * At least with GEM_SUN_GEM and some GEM_SUN_ERI 1798 * revisions GEM_MAC_RX_OVERFLOW happen often due to a 1799 * silicon bug so handle them silently. Moreover, it's 1800 * likely that the receiver has hung so we reset it. 1801 */ 1802 if ((status2 & GEM_MAC_RX_OVERFLOW) != 0) { 1803 if_inc_counter(sc->sc_ifp, IFCOUNTER_IERRORS, 1); 1804 gem_reset_rxdma(sc); 1805 } else if ((status2 & 1806 ~(GEM_MAC_RX_DONE | GEM_MAC_RX_FRAME_CNT)) != 0) 1807 device_printf(sc->sc_dev, 1808 "MAC RX fault, status %x\n", status2); 1809 } 1810 GEM_UNLOCK(sc); 1811 } 1812 1813 static int 1814 gem_watchdog(struct gem_softc *sc) 1815 { 1816 struct ifnet *ifp = sc->sc_ifp; 1817 1818 GEM_LOCK_ASSERT(sc, MA_OWNED); 1819 1820 #ifdef GEM_DEBUG 1821 CTR4(KTR_GEM, 1822 "%s: GEM_RX_CONFIG %x GEM_MAC_RX_STATUS %x GEM_MAC_RX_CONFIG %x", 1823 __func__, GEM_BANK1_READ_4(sc, GEM_RX_CONFIG), 1824 GEM_BANK1_READ_4(sc, GEM_MAC_RX_STATUS), 1825 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CONFIG)); 1826 CTR4(KTR_GEM, 1827 "%s: GEM_TX_CONFIG %x GEM_MAC_TX_STATUS %x GEM_MAC_TX_CONFIG %x", 1828 __func__, GEM_BANK1_READ_4(sc, GEM_TX_CONFIG), 1829 GEM_BANK1_READ_4(sc, GEM_MAC_TX_STATUS), 1830 GEM_BANK1_READ_4(sc, GEM_MAC_TX_CONFIG)); 1831 #endif 1832 1833 if (sc->sc_wdog_timer == 0 || --sc->sc_wdog_timer != 0) 1834 return (0); 1835 1836 if ((sc->sc_flags & GEM_LINK) != 0) 1837 device_printf(sc->sc_dev, "device timeout\n"); 1838 else if (bootverbose) 1839 device_printf(sc->sc_dev, "device timeout (no link)\n"); 1840 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1841 1842 /* Try to get more packets going. */ 1843 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1844 gem_init_locked(sc); 1845 gem_start_locked(ifp); 1846 return (EJUSTRETURN); 1847 } 1848 1849 static void 1850 gem_mifinit(struct gem_softc *sc) 1851 { 1852 1853 /* Configure the MIF in frame mode. */ 1854 GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, 1855 GEM_BANK1_READ_4(sc, GEM_MIF_CONFIG) & ~GEM_MIF_CONFIG_BB_ENA); 1856 GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4, 1857 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1858 } 1859 1860 /* 1861 * MII interface 1862 * 1863 * The MII interface supports at least three different operating modes: 1864 * 1865 * Bitbang mode is implemented using data, clock and output enable registers. 1866 * 1867 * Frame mode is implemented by loading a complete frame into the frame 1868 * register and polling the valid bit for completion. 1869 * 1870 * Polling mode uses the frame register but completion is indicated by 1871 * an interrupt. 1872 * 1873 */ 1874 int 1875 gem_mii_readreg(device_t dev, int phy, int reg) 1876 { 1877 struct gem_softc *sc; 1878 int n; 1879 uint32_t v; 1880 1881 #ifdef GEM_DEBUG_PHY 1882 printf("%s: phy %d reg %d\n", __func__, phy, reg); 1883 #endif 1884 1885 sc = device_get_softc(dev); 1886 if ((sc->sc_flags & GEM_SERDES) != 0) { 1887 switch (reg) { 1888 case MII_BMCR: 1889 reg = GEM_MII_CONTROL; 1890 break; 1891 case MII_BMSR: 1892 reg = GEM_MII_STATUS; 1893 break; 1894 case MII_PHYIDR1: 1895 case MII_PHYIDR2: 1896 return (0); 1897 case MII_ANAR: 1898 reg = GEM_MII_ANAR; 1899 break; 1900 case MII_ANLPAR: 1901 reg = GEM_MII_ANLPAR; 1902 break; 1903 case MII_EXTSR: 1904 return (EXTSR_1000XFDX | EXTSR_1000XHDX); 1905 default: 1906 device_printf(sc->sc_dev, 1907 "%s: unhandled register %d\n", __func__, reg); 1908 return (0); 1909 } 1910 return (GEM_BANK1_READ_4(sc, reg)); 1911 } 1912 1913 /* Construct the frame command. */ 1914 v = GEM_MIF_FRAME_READ | 1915 (phy << GEM_MIF_PHY_SHIFT) | 1916 (reg << GEM_MIF_REG_SHIFT); 1917 1918 GEM_BANK1_WRITE_4(sc, GEM_MIF_FRAME, v); 1919 GEM_BANK1_BARRIER(sc, GEM_MIF_FRAME, 4, 1920 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1921 for (n = 0; n < 100; n++) { 1922 DELAY(1); 1923 v = GEM_BANK1_READ_4(sc, GEM_MIF_FRAME); 1924 if (v & GEM_MIF_FRAME_TA0) 1925 return (v & GEM_MIF_FRAME_DATA); 1926 } 1927 1928 device_printf(sc->sc_dev, "%s: timed out\n", __func__); 1929 return (0); 1930 } 1931 1932 int 1933 gem_mii_writereg(device_t dev, int phy, int reg, int val) 1934 { 1935 struct gem_softc *sc; 1936 int n; 1937 uint32_t v; 1938 1939 #ifdef GEM_DEBUG_PHY 1940 printf("%s: phy %d reg %d val %x\n", phy, reg, val, __func__); 1941 #endif 1942 1943 sc = device_get_softc(dev); 1944 if ((sc->sc_flags & GEM_SERDES) != 0) { 1945 switch (reg) { 1946 case MII_BMSR: 1947 reg = GEM_MII_STATUS; 1948 break; 1949 case MII_BMCR: 1950 reg = GEM_MII_CONTROL; 1951 if ((val & GEM_MII_CONTROL_RESET) == 0) 1952 break; 1953 GEM_BANK1_WRITE_4(sc, GEM_MII_CONTROL, val); 1954 GEM_BANK1_BARRIER(sc, GEM_MII_CONTROL, 4, 1955 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1956 if (!GEM_BANK1_BITWAIT(sc, GEM_MII_CONTROL, 1957 GEM_MII_CONTROL_RESET, 0)) 1958 device_printf(sc->sc_dev, 1959 "cannot reset PCS\n"); 1960 /* FALLTHROUGH */ 1961 case MII_ANAR: 1962 GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG, 0); 1963 GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4, 1964 BUS_SPACE_BARRIER_WRITE); 1965 GEM_BANK1_WRITE_4(sc, GEM_MII_ANAR, val); 1966 GEM_BANK1_BARRIER(sc, GEM_MII_ANAR, 4, 1967 BUS_SPACE_BARRIER_WRITE); 1968 GEM_BANK1_WRITE_4(sc, GEM_MII_SLINK_CONTROL, 1969 GEM_MII_SLINK_LOOPBACK | GEM_MII_SLINK_EN_SYNC_D); 1970 GEM_BANK1_BARRIER(sc, GEM_MII_SLINK_CONTROL, 4, 1971 BUS_SPACE_BARRIER_WRITE); 1972 GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG, 1973 GEM_MII_CONFIG_ENABLE); 1974 GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4, 1975 BUS_SPACE_BARRIER_WRITE); 1976 return (0); 1977 case MII_ANLPAR: 1978 reg = GEM_MII_ANLPAR; 1979 break; 1980 default: 1981 device_printf(sc->sc_dev, 1982 "%s: unhandled register %d\n", __func__, reg); 1983 return (0); 1984 } 1985 GEM_BANK1_WRITE_4(sc, reg, val); 1986 GEM_BANK1_BARRIER(sc, reg, 4, 1987 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1988 return (0); 1989 } 1990 1991 /* Construct the frame command. */ 1992 v = GEM_MIF_FRAME_WRITE | 1993 (phy << GEM_MIF_PHY_SHIFT) | 1994 (reg << GEM_MIF_REG_SHIFT) | 1995 (val & GEM_MIF_FRAME_DATA); 1996 1997 GEM_BANK1_WRITE_4(sc, GEM_MIF_FRAME, v); 1998 GEM_BANK1_BARRIER(sc, GEM_MIF_FRAME, 4, 1999 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2000 for (n = 0; n < 100; n++) { 2001 DELAY(1); 2002 v = GEM_BANK1_READ_4(sc, GEM_MIF_FRAME); 2003 if (v & GEM_MIF_FRAME_TA0) 2004 return (1); 2005 } 2006 2007 device_printf(sc->sc_dev, "%s: timed out\n", __func__); 2008 return (0); 2009 } 2010 2011 void 2012 gem_mii_statchg(device_t dev) 2013 { 2014 struct gem_softc *sc; 2015 int gigabit; 2016 uint32_t rxcfg, txcfg, v; 2017 2018 sc = device_get_softc(dev); 2019 2020 GEM_LOCK_ASSERT(sc, MA_OWNED); 2021 2022 #ifdef GEM_DEBUG 2023 if ((sc->sc_ifp->if_flags & IFF_DEBUG) != 0) 2024 device_printf(sc->sc_dev, "%s: status change\n", __func__); 2025 #endif 2026 2027 if ((sc->sc_mii->mii_media_status & IFM_ACTIVE) != 0 && 2028 IFM_SUBTYPE(sc->sc_mii->mii_media_active) != IFM_NONE) 2029 sc->sc_flags |= GEM_LINK; 2030 else 2031 sc->sc_flags &= ~GEM_LINK; 2032 2033 switch (IFM_SUBTYPE(sc->sc_mii->mii_media_active)) { 2034 case IFM_1000_SX: 2035 case IFM_1000_LX: 2036 case IFM_1000_CX: 2037 case IFM_1000_T: 2038 gigabit = 1; 2039 break; 2040 default: 2041 gigabit = 0; 2042 } 2043 2044 /* 2045 * The configuration done here corresponds to the steps F) and 2046 * G) and as far as enabling of RX and TX MAC goes also step H) 2047 * of the initialization sequence outlined in section 3.2.1 of 2048 * the GEM Gigabit Ethernet ASIC Specification. 2049 */ 2050 2051 rxcfg = sc->sc_mac_rxcfg; 2052 rxcfg &= ~GEM_MAC_RX_CARR_EXTEND; 2053 txcfg = GEM_MAC_TX_ENA_IPG0 | GEM_MAC_TX_NGU | GEM_MAC_TX_NGU_LIMIT; 2054 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) != 0) 2055 txcfg |= GEM_MAC_TX_IGN_CARRIER | GEM_MAC_TX_IGN_COLLIS; 2056 else if (gigabit != 0) { 2057 rxcfg |= GEM_MAC_RX_CARR_EXTEND; 2058 txcfg |= GEM_MAC_TX_CARR_EXTEND; 2059 } 2060 (void)gem_disable_tx(sc); 2061 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, txcfg); 2062 (void)gem_disable_rx(sc); 2063 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, rxcfg); 2064 2065 v = GEM_BANK1_READ_4(sc, GEM_MAC_CONTROL_CONFIG) & 2066 ~(GEM_MAC_CC_RX_PAUSE | GEM_MAC_CC_TX_PAUSE); 2067 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2068 IFM_ETH_RXPAUSE) != 0) 2069 v |= GEM_MAC_CC_RX_PAUSE; 2070 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2071 IFM_ETH_TXPAUSE) != 0) 2072 v |= GEM_MAC_CC_TX_PAUSE; 2073 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_CONFIG, v); 2074 2075 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) == 0 && 2076 gigabit != 0) 2077 GEM_BANK1_WRITE_4(sc, GEM_MAC_SLOT_TIME, 2078 GEM_MAC_SLOT_TIME_CARR_EXTEND); 2079 else 2080 GEM_BANK1_WRITE_4(sc, GEM_MAC_SLOT_TIME, 2081 GEM_MAC_SLOT_TIME_NORMAL); 2082 2083 /* XIF Configuration */ 2084 v = GEM_MAC_XIF_LINK_LED; 2085 v |= GEM_MAC_XIF_TX_MII_ENA; 2086 if ((sc->sc_flags & GEM_SERDES) == 0) { 2087 if ((GEM_BANK1_READ_4(sc, GEM_MIF_CONFIG) & 2088 GEM_MIF_CONFIG_PHY_SEL) != 0) { 2089 /* External MII needs echo disable if half duplex. */ 2090 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2091 IFM_FDX) == 0) 2092 v |= GEM_MAC_XIF_ECHO_DISABL; 2093 } else 2094 /* 2095 * Internal MII needs buffer enable. 2096 * XXX buffer enable makes only sense for an 2097 * external PHY. 2098 */ 2099 v |= GEM_MAC_XIF_MII_BUF_ENA; 2100 } 2101 if (gigabit != 0) 2102 v |= GEM_MAC_XIF_GMII_MODE; 2103 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) != 0) 2104 v |= GEM_MAC_XIF_FDPLX_LED; 2105 GEM_BANK1_WRITE_4(sc, GEM_MAC_XIF_CONFIG, v); 2106 2107 sc->sc_mac_rxcfg = rxcfg; 2108 if ((sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) != 0 && 2109 (sc->sc_flags & GEM_LINK) != 0) { 2110 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, 2111 txcfg | GEM_MAC_TX_ENABLE); 2112 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, 2113 rxcfg | GEM_MAC_RX_ENABLE); 2114 } 2115 } 2116 2117 int 2118 gem_mediachange(struct ifnet *ifp) 2119 { 2120 struct gem_softc *sc = ifp->if_softc; 2121 int error; 2122 2123 /* XXX add support for serial media. */ 2124 2125 GEM_LOCK(sc); 2126 error = mii_mediachg(sc->sc_mii); 2127 GEM_UNLOCK(sc); 2128 return (error); 2129 } 2130 2131 void 2132 gem_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 2133 { 2134 struct gem_softc *sc = ifp->if_softc; 2135 2136 GEM_LOCK(sc); 2137 if ((ifp->if_flags & IFF_UP) == 0) { 2138 GEM_UNLOCK(sc); 2139 return; 2140 } 2141 2142 mii_pollstat(sc->sc_mii); 2143 ifmr->ifm_active = sc->sc_mii->mii_media_active; 2144 ifmr->ifm_status = sc->sc_mii->mii_media_status; 2145 GEM_UNLOCK(sc); 2146 } 2147 2148 static int 2149 gem_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2150 { 2151 struct gem_softc *sc = ifp->if_softc; 2152 struct ifreq *ifr = (struct ifreq *)data; 2153 int error; 2154 2155 error = 0; 2156 switch (cmd) { 2157 case SIOCSIFFLAGS: 2158 GEM_LOCK(sc); 2159 if ((ifp->if_flags & IFF_UP) != 0) { 2160 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0 && 2161 ((ifp->if_flags ^ sc->sc_ifflags) & 2162 (IFF_ALLMULTI | IFF_PROMISC)) != 0) 2163 gem_setladrf(sc); 2164 else 2165 gem_init_locked(sc); 2166 } else if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 2167 gem_stop(ifp, 0); 2168 if ((ifp->if_flags & IFF_LINK0) != 0) 2169 sc->sc_csum_features |= CSUM_UDP; 2170 else 2171 sc->sc_csum_features &= ~CSUM_UDP; 2172 if ((ifp->if_capenable & IFCAP_TXCSUM) != 0) 2173 ifp->if_hwassist = sc->sc_csum_features; 2174 sc->sc_ifflags = ifp->if_flags; 2175 GEM_UNLOCK(sc); 2176 break; 2177 case SIOCADDMULTI: 2178 case SIOCDELMULTI: 2179 GEM_LOCK(sc); 2180 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 2181 gem_setladrf(sc); 2182 GEM_UNLOCK(sc); 2183 break; 2184 case SIOCGIFMEDIA: 2185 case SIOCSIFMEDIA: 2186 error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii->mii_media, cmd); 2187 break; 2188 case SIOCSIFCAP: 2189 GEM_LOCK(sc); 2190 ifp->if_capenable = ifr->ifr_reqcap; 2191 if ((ifp->if_capenable & IFCAP_TXCSUM) != 0) 2192 ifp->if_hwassist = sc->sc_csum_features; 2193 else 2194 ifp->if_hwassist = 0; 2195 GEM_UNLOCK(sc); 2196 break; 2197 default: 2198 error = ether_ioctl(ifp, cmd, data); 2199 break; 2200 } 2201 2202 return (error); 2203 } 2204 2205 static u_int 2206 gem_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt) 2207 { 2208 uint32_t crc, *hash = arg; 2209 2210 crc = ether_crc32_le(LLADDR(sdl), ETHER_ADDR_LEN); 2211 /* We just want the 8 most significant bits. */ 2212 crc >>= 24; 2213 /* Set the corresponding bit in the filter. */ 2214 hash[crc >> 4] |= 1 << (15 - (crc & 15)); 2215 2216 return (1); 2217 } 2218 2219 static void 2220 gem_setladrf(struct gem_softc *sc) 2221 { 2222 struct ifnet *ifp = sc->sc_ifp; 2223 int i; 2224 uint32_t hash[16]; 2225 uint32_t v; 2226 2227 GEM_LOCK_ASSERT(sc, MA_OWNED); 2228 2229 /* 2230 * Turn off the RX MAC and the hash filter as required by the Sun GEM 2231 * programming restrictions. 2232 */ 2233 v = sc->sc_mac_rxcfg & ~GEM_MAC_RX_HASH_FILTER; 2234 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, v); 2235 GEM_BANK1_BARRIER(sc, GEM_MAC_RX_CONFIG, 4, 2236 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2237 if (!GEM_BANK1_BITWAIT(sc, GEM_MAC_RX_CONFIG, GEM_MAC_RX_HASH_FILTER | 2238 GEM_MAC_RX_ENABLE, 0)) 2239 device_printf(sc->sc_dev, 2240 "cannot disable RX MAC or hash filter\n"); 2241 2242 v &= ~(GEM_MAC_RX_PROMISCUOUS | GEM_MAC_RX_PROMISC_GRP); 2243 if ((ifp->if_flags & IFF_PROMISC) != 0) { 2244 v |= GEM_MAC_RX_PROMISCUOUS; 2245 goto chipit; 2246 } 2247 if ((ifp->if_flags & IFF_ALLMULTI) != 0) { 2248 v |= GEM_MAC_RX_PROMISC_GRP; 2249 goto chipit; 2250 } 2251 2252 /* 2253 * Set up multicast address filter by passing all multicast 2254 * addresses through a crc generator, and then using the high 2255 * order 8 bits as an index into the 256 bit logical address 2256 * filter. The high order 4 bits selects the word, while the 2257 * other 4 bits select the bit within the word (where bit 0 2258 * is the MSB). 2259 */ 2260 2261 memset(hash, 0, sizeof(hash)); 2262 if_foreach_llmaddr(ifp, gem_hash_maddr, hash); 2263 2264 v |= GEM_MAC_RX_HASH_FILTER; 2265 2266 /* Now load the hash table into the chip (if we are using it). */ 2267 for (i = 0; i < 16; i++) 2268 GEM_BANK1_WRITE_4(sc, 2269 GEM_MAC_HASH0 + i * (GEM_MAC_HASH1 - GEM_MAC_HASH0), 2270 hash[i]); 2271 2272 chipit: 2273 sc->sc_mac_rxcfg = v; 2274 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, v | GEM_MAC_RX_ENABLE); 2275 }
Cache object: cf070c534c956aa62bf31bacc89486ab
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]