mtd8xx.c revision 1.6
1/* $OpenBSD: mtd8xx.c,v 1.6 2004/09/23 17:45:16 brad Exp $ */ 2 3/* 4 * Copyright (c) 2003 Oleg Safiullin <form@pdp11.org.ru> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31#include "bpfilter.h" 32 33#include <sys/param.h> 34#include <sys/mbuf.h> 35#include <sys/systm.h> 36#include <sys/device.h> 37#include <sys/socket.h> 38#include <sys/ioctl.h> 39 40#include <net/if.h> 41#include <net/if_media.h> 42 43#if NBPFILTER > 0 44#include <net/bpf.h> 45#endif 46 47#ifdef INET 48#include <netinet/in.h> 49#include <netinet/if_ether.h> 50#endif 51 52#include <machine/bus.h> 53 54#include <dev/mii/mii.h> 55#include <dev/mii/miivar.h> 56 57#include <dev/pci/pcidevs.h> 58#include <dev/pci/pcivar.h> 59 60#include <dev/ic/mtd8xxreg.h> 61#include <dev/ic/mtd8xxvar.h> 62 63 64static int mtd_ifmedia_upd(struct ifnet *); 65static void mtd_ifmedia_sts(struct ifnet *, struct ifmediareq *); 66 67static u_int32_t mtd_mii_command(struct mtd_softc *, int, int, int); 68static int mtd_miibus_readreg(struct device *, int, int); 69static void mtd_miibus_writereg(struct device *, int, int, int); 70static void mtd_miibus_statchg(struct device *); 71static void mtd_setmulti(struct mtd_softc *); 72 73static int mtd_encap(struct mtd_softc *, struct mbuf *, u_int32_t *); 74static int mtd_list_rx_init(struct mtd_softc *); 75static void mtd_list_tx_init(struct mtd_softc *); 76static int mtd_newbuf(struct mtd_softc *, int, struct mbuf *); 77 78static void mtd_reset(struct mtd_softc *sc); 79static int mtd_ioctl(struct ifnet *, u_long, caddr_t); 80static void mtd_init(struct ifnet *); 81static void mtd_start(struct ifnet *); 82static void mtd_stop(struct ifnet *); 83static void mtd_watchdog(struct ifnet *); 84 85static void mtd_rxeof(struct mtd_softc *); 86static int mtd_rx_resync(struct mtd_softc *); 87static void mtd_txeof(struct mtd_softc *); 88 89 90void 91mtd_attach(struct mtd_softc *sc) 92{ 93 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 94 u_int32_t enaddr[2]; 95 int i; 96 97 /* Reset the adapter. */ 98 mtd_reset(sc); 99 100 if (bus_dmamem_alloc(sc->sc_dmat, sizeof(struct mtd_list_data), 101 PAGE_SIZE, 0, sc->sc_listseg, 1, &sc->sc_listnseg, 102 BUS_DMA_NOWAIT) != 0) { 103 printf(": can't alloc list mem\n"); 104 return; 105 } 106 if (bus_dmamem_map(sc->sc_dmat, sc->sc_listseg, sc->sc_listnseg, 107 sizeof(struct mtd_list_data), &sc->sc_listkva, 108 BUS_DMA_NOWAIT) != 0) { 109 printf(": can't map list mem\n"); 110 return; 111 } 112 if (bus_dmamap_create(sc->sc_dmat, sizeof(struct mtd_list_data), 1, 113 sizeof(struct mtd_list_data), 0, BUS_DMA_NOWAIT, 114 &sc->sc_listmap) != 0) { 115 printf(": can't alloc list map\n"); 116 return; 117 } 118 if (bus_dmamap_load(sc->sc_dmat, sc->sc_listmap, sc->sc_listkva, 119 sizeof(struct mtd_list_data), NULL, BUS_DMA_NOWAIT) != 0) { 120 printf(": can't load list map\n"); 121 return; 122 } 123 sc->mtd_ldata = (struct mtd_list_data *)sc->sc_listkva; 124 bzero(sc->mtd_ldata, sizeof(struct mtd_list_data)); 125 126 for (i = 0; i < MTD_RX_LIST_CNT; i++) { 127 if (bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, MCLBYTES, 128 0, BUS_DMA_NOWAIT, 129 &sc->mtd_cdata.mtd_rx_chain[i].sd_map) != 0) { 130 printf(": can't create rx map\n"); 131 return; 132 } 133 } 134 if (bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, MCLBYTES, 0, 135 BUS_DMA_NOWAIT, &sc->sc_rx_sparemap) != 0) { 136 printf(": can't create rx spare map\n"); 137 return; 138 } 139 140 for (i = 0; i < MTD_TX_LIST_CNT; i++) { 141 if (bus_dmamap_create(sc->sc_dmat, MCLBYTES, 142 MTD_TX_LIST_CNT - 5, MCLBYTES, 0, BUS_DMA_NOWAIT, 143 &sc->mtd_cdata.mtd_tx_chain[i].sd_map) != 0) { 144 printf(": can't create tx map\n"); 145 return; 146 } 147 } 148 if (bus_dmamap_create(sc->sc_dmat, MCLBYTES, MTD_TX_LIST_CNT - 5, 149 MCLBYTES, 0, BUS_DMA_NOWAIT, &sc->sc_tx_sparemap) != 0) { 150 printf(": can't create tx spare map\n"); 151 return; 152 } 153 154 155 /* Get station address. */ 156 enaddr[0] = letoh32(CSR_READ_4(MTD_PAR0)); 157 enaddr[1] = letoh32(CSR_READ_4(MTD_PAR4)); 158 bcopy(enaddr, sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN); 159 printf(" address %s\n", ether_sprintf(sc->sc_arpcom.ac_enaddr)); 160 161 /* Initialize interface */ 162 ifp->if_softc = sc; 163 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 164 ifp->if_ioctl = mtd_ioctl; 165 ifp->if_start = mtd_start; 166 ifp->if_watchdog = mtd_watchdog; 167 ifp->if_baudrate = 10000000; 168 IFQ_SET_READY(&ifp->if_snd); 169 bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 170 171 /* 172 * Initialize our media structures and probe the MII. 173 */ 174 sc->sc_mii.mii_ifp = ifp; 175 sc->sc_mii.mii_readreg = mtd_miibus_readreg; 176 sc->sc_mii.mii_writereg = mtd_miibus_writereg; 177 sc->sc_mii.mii_statchg = mtd_miibus_statchg; 178 ifmedia_init(&sc->sc_mii.mii_media, 0, mtd_ifmedia_upd, 179 mtd_ifmedia_sts); 180 mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff, MII_PHY_ANY, 181 MII_OFFSET_ANY, 0); 182 if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) { 183 ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER | IFM_NONE, 0, 184 NULL); 185 ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER | IFM_NONE); 186 } else 187 ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER | IFM_AUTO); 188 189 /* 190 * Attach us everywhere 191 */ 192 if_attach(ifp); 193 ether_ifattach(ifp); 194} 195 196 197static int 198mtd_ifmedia_upd(struct ifnet *ifp) 199{ 200 struct mtd_softc *sc = ifp->if_softc; 201 202 return (mii_mediachg(&sc->sc_mii)); 203} 204 205 206static void 207mtd_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 208{ 209 struct mtd_softc *sc = ifp->if_softc; 210 211 mii_pollstat(&sc->sc_mii); 212 ifmr->ifm_active = sc->sc_mii.mii_media_active; 213 ifmr->ifm_status = sc->sc_mii.mii_media_status; 214} 215 216 217static u_int32_t 218mtd_mii_command(struct mtd_softc *sc, int opcode, int phy, int reg) 219{ 220 u_int32_t miir, mask, data; 221 int i; 222 223 miir = (CSR_READ_4(MTD_MIIMGT) & ~MIIMGT_MASK) | MIIMGT_WRITE | 224 MIIMGT_MDO; 225 226 for (i = 0; i < 32; i++) { 227 miir &= ~MIIMGT_MDC; 228 CSR_WRITE_4(MTD_MIIMGT, miir); 229 miir |= MIIMGT_MDC; 230 CSR_WRITE_4(MTD_MIIMGT, miir); 231 } 232 233 data = opcode | (phy << 7) | (reg << 2); 234 235 for (mask = 0; mask; mask >>= 1) { 236 miir &= ~(MIIMGT_MDC | MIIMGT_MDO); 237 if (mask & data) 238 miir |= MIIMGT_MDO; 239 CSR_WRITE_4(MTD_MIIMGT, miir); 240 miir |= MIIMGT_MDC; 241 CSR_WRITE_4(MTD_MIIMGT, miir); 242 DELAY(30); 243 244 if (mask == 0x4 && opcode == MII_OPCODE_RD) 245 miir &= ~MIIMGT_WRITE; 246 } 247 return (miir); 248} 249 250 251 252static int 253mtd_miibus_readreg(struct device *self, int phy, int reg) 254{ 255 struct mtd_softc *sc = (void *)self; 256 257 if (sc->sc_devid == PCI_PRODUCT_MYSON_MTD803) 258 return (phy ? 0 : (int)CSR_READ_2(MTD_PHYCSR + (reg << 1))); 259 else { 260 u_int32_t miir, mask, data; 261 262 miir = mtd_mii_command(sc, MII_OPCODE_RD, phy, reg); 263 for (mask = 0x8000, data = 0; mask; mask >>= 1) { 264 miir &= ~MIIMGT_MDC; 265 CSR_WRITE_4(MTD_MIIMGT, miir); 266 miir = CSR_READ_4(MTD_MIIMGT); 267 if (miir & MIIMGT_MDI) 268 data |= mask; 269 miir |= MIIMGT_MDC; 270 CSR_WRITE_4(MTD_MIIMGT, miir); 271 DELAY(30); 272 } 273 miir &= ~MIIMGT_MDC; 274 CSR_WRITE_4(MTD_MIIMGT, miir); 275 276 return ((int)data); 277 } 278} 279 280 281static void 282mtd_miibus_writereg(struct device *self, int phy, int reg, int val) 283{ 284 struct mtd_softc *sc = (void *)self; 285 286 if (sc->sc_devid == PCI_PRODUCT_MYSON_MTD803) { 287 if (!phy) 288 CSR_WRITE_2(MTD_PHYCSR + (reg << 1), val); 289 } else { 290 u_int32_t miir, mask; 291 292 miir = mtd_mii_command(sc, MII_OPCODE_WR, phy, reg); 293 for (mask = 0x8000; mask; mask >>= 1) { 294 miir &= ~(MIIMGT_MDC | MIIMGT_MDO); 295 if (mask & (u_int32_t)val) 296 miir |= MIIMGT_MDO;; 297 CSR_WRITE_4(MTD_MIIMGT, miir); 298 miir |= MIIMGT_MDC; 299 CSR_WRITE_4(MTD_MIIMGT, miir); 300 DELAY(1); 301 } 302 miir &= ~MIIMGT_MDC; 303 CSR_WRITE_4(MTD_MIIMGT, miir); 304 } 305} 306 307 308static void 309mtd_miibus_statchg(struct device *self) 310{ 311 /* NOTHING */ 312} 313 314 315void 316mtd_setmulti(struct mtd_softc *sc) 317{ 318 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 319 u_int32_t rxfilt, crc, hash[2] = { 0, 0 }; 320 struct ether_multistep step; 321 struct ether_multi *enm; 322 int mcnt = 0; 323 324allmulti: 325 rxfilt = CSR_READ_4(MTD_TCRRCR) & ~RCR_AM; 326 if (ifp->if_flags & (IFF_ALLMULTI | IFF_PROMISC)) { 327 rxfilt |= RCR_AM; 328 CSR_WRITE_4(MTD_TCRRCR, rxfilt); 329 CSR_WRITE_4(MTD_MAR0, 0xffffffff); 330 CSR_WRITE_4(MTD_MAR4, 0xffffffff); 331 return; 332 } 333 334 /* First, zot all the existing hash bits. */ 335 CSR_WRITE_4(MTD_MAR0, 0); 336 CSR_WRITE_4(MTD_MAR4, 0); 337 338 /* Now program new ones. */ 339 ETHER_FIRST_MULTI(step, &sc->sc_arpcom, enm); 340 while (enm != NULL) { 341 if (bcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) { 342 ifp->if_flags |= IFF_ALLMULTI; 343 goto allmulti; 344 } 345 crc = ether_crc32_be(enm->enm_addrlo, ETHER_ADDR_LEN) >> 26; 346 hash[crc >> 5] |= 1 << (crc & 0xf); 347 ++mcnt; 348 ETHER_NEXT_MULTI(step, enm); 349 } 350 351 if (mcnt) 352 rxfilt |= RCR_AM; 353 CSR_WRITE_4(MTD_MAR0, hash[0]); 354 CSR_WRITE_4(MTD_MAR4, hash[1]); 355 CSR_WRITE_4(MTD_TCRRCR, rxfilt); 356} 357 358 359/* 360 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 361 * pointers to the fragment pointers. 362 */ 363int 364mtd_encap(struct mtd_softc *sc, struct mbuf *m_head, u_int32_t *txidx) 365{ 366 struct mtd_tx_desc *f = NULL; 367 int frag, cur, cnt = 0, i, total_len = 0; 368 bus_dmamap_t map; 369 370 /* 371 * Start packing the mbufs in this chain into 372 * the fragment pointers. Stop when we run out 373 * of fragments or hit the end of the mbuf chain. 374 */ 375 map = sc->sc_tx_sparemap; 376 377 if (bus_dmamap_load_mbuf(sc->sc_dmat, map, 378 m_head, BUS_DMA_NOWAIT) != 0) 379 return (1); 380 381 cur = frag = *txidx; 382 383 for (i = 0; i < map->dm_nsegs; i++) { 384 if ((MTD_TX_LIST_CNT - 385 (sc->mtd_cdata.mtd_tx_cnt + cnt)) < 5) { 386 bus_dmamap_unload(sc->sc_dmat, map); 387 return (1); 388 } 389 390 f = &sc->mtd_ldata->mtd_tx_list[frag]; 391 f->td_tcw = htole32(map->dm_segs[i].ds_len); 392 total_len += map->dm_segs[i].ds_len; 393 if (cnt == 0) { 394 f->td_tsw = 0; 395 f->td_tcw |= htole32(TCW_FD | TCW_CRC | TCW_PAD); 396 } else 397 f->td_tsw = htole32(TSW_OWN); 398 f->td_buf = htole32(map->dm_segs[i].ds_addr); 399 cur = frag; 400 frag = (frag + 1) % MTD_TX_LIST_CNT; 401 cnt++; 402 } 403 404 sc->mtd_cdata.mtd_tx_cnt += cnt; 405 sc->mtd_cdata.mtd_tx_chain[cur].sd_mbuf = m_head; 406 sc->sc_tx_sparemap = sc->mtd_cdata.mtd_tx_chain[cur].sd_map; 407 sc->mtd_cdata.mtd_tx_chain[cur].sd_map = map; 408 sc->mtd_ldata->mtd_tx_list[cur].td_tcw |= htole32(TCW_LD | TCW_IC); 409 if (sc->sc_devid == PCI_PRODUCT_MYSON_MTD891) 410 sc->mtd_ldata->mtd_tx_list[cur].td_tcw |= 411 htole32(TCW_EIC | TCW_RTLC); 412 413 bus_dmamap_sync(sc->sc_dmat, map, 0, map->dm_mapsize, 414 BUS_DMASYNC_PREWRITE); 415 416 sc->mtd_ldata->mtd_tx_list[*txidx].td_tsw = htole32(TSW_OWN); 417 sc->mtd_ldata->mtd_tx_list[*txidx].td_tcw |= 418 htole32(total_len << TCW_PKTS_SHIFT); 419 420 bus_dmamap_sync(sc->sc_dmat, sc->sc_listmap, 421 offsetof(struct mtd_list_data, mtd_tx_list[0]), 422 sizeof(struct mtd_tx_desc) * MTD_TX_LIST_CNT, 423 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 424 425 *txidx = frag; 426 427 return (0); 428} 429 430 431/* 432 * Initialize the transmit descriptors. 433 */ 434static void 435mtd_list_tx_init(struct mtd_softc *sc) 436{ 437 struct mtd_chain_data *cd; 438 struct mtd_list_data *ld; 439 int i; 440 441 cd = &sc->mtd_cdata; 442 ld = sc->mtd_ldata; 443 for (i = 0; i < MTD_TX_LIST_CNT; i++) { 444 cd->mtd_tx_chain[i].sd_mbuf = NULL; 445 ld->mtd_tx_list[i].td_tsw = 0; 446 ld->mtd_tx_list[i].td_tcw = 0; 447 ld->mtd_tx_list[i].td_buf = 0; 448 ld->mtd_tx_list[i].td_next = htole32( 449 sc->sc_listmap->dm_segs[0].ds_addr + 450 offsetof(struct mtd_list_data, 451 mtd_tx_list[(i + 1) % MTD_TX_LIST_CNT])); 452 } 453 454 cd->mtd_tx_prod = cd->mtd_tx_cons = cd->mtd_tx_cnt = 0; 455} 456 457 458/* 459 * Initialize the RX descriptors and allocate mbufs for them. Note that 460 * we arrange the descriptors in a closed ring, so that the last descriptor 461 * points back to the first. 462 */ 463static int 464mtd_list_rx_init(struct mtd_softc *sc) 465{ 466 struct mtd_list_data *ld; 467 int i; 468 469 ld = sc->mtd_ldata; 470 471 for (i = 0; i < MTD_RX_LIST_CNT; i++) { 472 if (mtd_newbuf(sc, i, NULL)) 473 return (1); 474 ld->mtd_rx_list[i].rd_next = htole32( 475 sc->sc_listmap->dm_segs[0].ds_addr + 476 offsetof(struct mtd_list_data, 477 mtd_rx_list[(i + 1) % MTD_RX_LIST_CNT]) 478 ); 479 } 480 481 sc->mtd_cdata.mtd_rx_prod = 0; 482 483 return (0); 484} 485 486 487/* 488 * Initialize an RX descriptor and attach an MBUF cluster. 489 */ 490static int 491mtd_newbuf(struct mtd_softc *sc, int i, struct mbuf *m) 492{ 493 struct mbuf *m_new = NULL; 494 struct mtd_rx_desc *c; 495 bus_dmamap_t map; 496 497 c = &sc->mtd_ldata->mtd_rx_list[i]; 498 499 if (m == NULL) { 500 MGETHDR(m_new, M_DONTWAIT, MT_DATA); 501 if (m_new == NULL) { 502 printf("%s: no memory for rx list " 503 "-- packet dropped!\n", sc->sc_dev.dv_xname); 504 return (1); 505 } 506 507 MCLGET(m_new, M_DONTWAIT); 508 if (!(m_new->m_flags & M_EXT)) { 509 printf("%s: no memory for rx list " 510 "-- packet dropped!\n", sc->sc_dev.dv_xname); 511 m_freem(m_new); 512 return (1); 513 } 514 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 515 if (bus_dmamap_load(sc->sc_dmat, sc->sc_rx_sparemap, 516 mtod(m_new, caddr_t), MCLBYTES, NULL, 517 BUS_DMA_NOWAIT) != 0) { 518 printf("%s: rx load failed\n", sc->sc_dev.dv_xname); 519 m_freem(m_new); 520 return (1); 521 } 522 map = sc->mtd_cdata.mtd_rx_chain[i].sd_map; 523 sc->mtd_cdata.mtd_rx_chain[i].sd_map = sc->sc_rx_sparemap; 524 sc->sc_rx_sparemap = map; 525 } else { 526 m_new = m; 527 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; 528 m_new->m_data = m_new->m_ext.ext_buf; 529 } 530 531 m_adj(m_new, sizeof(u_int64_t)); 532 533 bus_dmamap_sync(sc->sc_dmat, sc->mtd_cdata.mtd_rx_chain[i].sd_map, 0, 534 sc->mtd_cdata.mtd_rx_chain[i].sd_map->dm_mapsize, 535 BUS_DMASYNC_PREREAD); 536 537 sc->mtd_cdata.mtd_rx_chain[i].sd_mbuf = m_new; 538 c->rd_buf = htole32( 539 sc->mtd_cdata.mtd_rx_chain[i].sd_map->dm_segs[0].ds_addr + 540 sizeof(u_int64_t)); 541 c->rd_rcw = htole32(MTD_RXLEN); 542 c->rd_rsr = htole32(RSR_OWN); 543 544 bus_dmamap_sync(sc->sc_dmat, sc->sc_listmap, 545 offsetof(struct mtd_list_data, mtd_rx_list[i]), 546 sizeof(struct mtd_rx_desc), 547 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 548 549 return (0); 550} 551 552 553static void 554mtd_reset(struct mtd_softc *sc) 555{ 556 int i; 557 558 /* Set software reset bit */ 559 CSR_WRITE_4(MTD_BCR, BCR_SWR); 560 561 /* 562 * Wait until software reset completed. 563 */ 564 for (i = 0; i < MTD_TIMEOUT; ++i) { 565 DELAY(10); 566 if (!(CSR_READ_4(MTD_BCR) & BCR_SWR)) { 567 /* 568 * Wait a little while for the chip to get 569 * its brains in order. 570 */ 571 DELAY(1000); 572 return; 573 } 574 } 575 576 /* Reset timed out. */ 577 printf("%s: reset never completed!\n", sc->sc_dev.dv_xname); 578} 579 580 581static int 582mtd_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 583{ 584 struct mtd_softc *sc = ifp->if_softc; 585 struct ifreq *ifr = (struct ifreq *)data; 586 struct ifaddr *ifa = (struct ifaddr *)data; 587 int s, error; 588 589 s = splimp(); 590 if ((error = ether_ioctl(ifp, &sc->sc_arpcom, command, data)) > 0) { 591 splx(s); 592 return (error); 593 } 594 595 switch (command) { 596 case SIOCSIFADDR: 597 ifp->if_flags |= IFF_UP; 598 mtd_init(ifp); 599 switch (ifa->ifa_addr->sa_family) { 600#ifdef INET 601 case AF_INET: 602 arp_ifinit(&sc->sc_arpcom, ifa); 603 break; 604#endif /* INET */ 605 } 606 break; 607 case SIOCSIFMTU: 608 if (ifr->ifr_mtu >= ETHERMIN && ifr->ifr_mtu <= ETHERMTU) 609 ifp->if_mtu = ifr->ifr_mtu; 610 else 611 error = EINVAL; 612 break; 613 614 case SIOCSIFFLAGS: 615 if (ifp->if_flags & IFF_UP) 616 mtd_init(ifp); 617 else { 618 if (ifp->if_flags & IFF_RUNNING) 619 mtd_stop(ifp); 620 } 621 error = 0; 622 break; 623 case SIOCADDMULTI: 624 case SIOCDELMULTI: 625 error = (command == SIOCADDMULTI) ? 626 ether_addmulti(ifr, &sc->sc_arpcom) : 627 ether_delmulti(ifr, &sc->sc_arpcom); 628 629 if (error == ENETRESET) { 630 /* 631 * Multicast list has changed; set the hardware 632 * filter accordingly. 633 */ 634 mtd_setmulti(sc); 635 error = 0; 636 } 637 break; 638 case SIOCGIFMEDIA: 639 case SIOCSIFMEDIA: 640 error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii.mii_media, command); 641 break; 642 default: 643 error = EINVAL; 644 break; 645 } 646 647 splx(s); 648 return (error); 649} 650 651 652static void 653mtd_init(struct ifnet *ifp) 654{ 655 struct mtd_softc *sc = ifp->if_softc; 656 int s; 657 658 s = splimp(); 659 660 /* 661 * Cancel pending I/O and free all RX/TX buffers. 662 */ 663 mtd_stop(ifp); 664 665 /* 666 * Set cache alignment and burst length. 667 */ 668 CSR_WRITE_4(MTD_BCR, BCR_PBL8); 669 CSR_WRITE_4(MTD_TCRRCR, TCR_TFTSF | RCR_RBLEN | RCR_RPBL512); 670 if (sc->sc_devid == PCI_PRODUCT_MYSON_MTD891) { 671 CSR_SETBIT(MTD_BCR, BCR_PROG); 672 CSR_SETBIT(MTD_TCRRCR, TCR_ENHANCED); 673 } 674 675 if (ifp->if_flags & IFF_PROMISC) 676 CSR_SETBIT(MTD_TCRRCR, RCR_PROM); 677 else 678 CSR_CLRBIT(MTD_TCRRCR, RCR_PROM); 679 680 if (ifp->if_flags & IFF_BROADCAST) 681 CSR_SETBIT(MTD_TCRRCR, RCR_AB); 682 else 683 CSR_CLRBIT(MTD_TCRRCR, RCR_AB); 684 685 mtd_setmulti(sc); 686 687 if (mtd_list_rx_init(sc)) { 688 printf("%s: can't allocate memeory for rx buffers\n", 689 sc->sc_dev.dv_xname); 690 splx(s); 691 return; 692 } 693 mtd_list_tx_init(sc); 694 695 CSR_WRITE_4(MTD_RXLBA, sc->sc_listmap->dm_segs[0].ds_addr + 696 offsetof(struct mtd_list_data, mtd_rx_list[0])); 697 CSR_WRITE_4(MTD_TXLBA, sc->sc_listmap->dm_segs[0].ds_addr + 698 offsetof(struct mtd_list_data, mtd_tx_list[0])); 699 700 /* 701 * Enable interrupts. 702 */ 703 CSR_WRITE_4(MTD_IMR, IMR_INTRS); 704 CSR_WRITE_4(MTD_ISR, 0xffffffff); 705 706 /* Enable receiver and transmitter */ 707 CSR_SETBIT(MTD_TCRRCR, TCR_TE | RCR_RE); 708 CSR_WRITE_4(MTD_RXPDR, 0xffffffff); 709 710 ifp->if_flags |= IFF_RUNNING; 711 ifp->if_flags &= ~IFF_OACTIVE; 712 splx(s); 713} 714 715 716/* 717 * Main transmit routine. To avoid having to do mbuf copies, we put pointers 718 * to the mbuf data regions directly in the transmit lists. We also save a 719 * copy of the pointers since the transmit list fragment pointers are 720 * physical addresses. 721 */ 722static void 723mtd_start(struct ifnet *ifp) 724{ 725 struct mtd_softc *sc = ifp->if_softc; 726 struct mbuf *m_head = NULL; 727 int idx; 728 729 if (sc->mtd_cdata.mtd_tx_cnt) { 730 ifp->if_flags |= IFF_OACTIVE; 731 return; 732 } 733 734 idx = sc->mtd_cdata.mtd_tx_prod; 735 while (sc->mtd_cdata.mtd_tx_chain[idx].sd_mbuf == NULL) { 736 IFQ_DEQUEUE(&ifp->if_snd, m_head); 737 if (m_head == NULL) 738 break; 739 740 if (mtd_encap(sc, m_head, &idx)) { 741 ifp->if_flags |= IFF_OACTIVE; 742 break; 743 } 744 745 /* 746 * If there's a BPF listener, bounce a copy of this frame 747 * to him. 748 */ 749#if NBPFILTER > 0 750 if (ifp->if_bpf != NULL) 751 bpf_mtap(ifp->if_bpf, m_head); 752#endif 753 } 754 755 if (idx == sc->mtd_cdata.mtd_tx_prod) 756 return; 757 758 /* Transmit */ 759 sc->mtd_cdata.mtd_tx_prod = idx; 760 CSR_WRITE_4(MTD_TXPDR, 0xffffffff); 761 762 /* 763 * Set a timeout in case the chip goes out to lunch. 764 */ 765 ifp->if_timer = 5; 766} 767 768 769static void 770mtd_stop(struct ifnet *ifp) 771{ 772 struct mtd_softc *sc = ifp->if_softc; 773 int i; 774 775 ifp->if_timer = 0; 776 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 777 778 CSR_CLRBIT(MTD_TCRRCR, (RCR_RE | TCR_TE)); 779 CSR_WRITE_4(MTD_IMR, 0); 780 CSR_WRITE_4(MTD_TXLBA, 0); 781 CSR_WRITE_4(MTD_RXLBA, 0); 782 783 /* 784 * Free data in the RX lists. 785 */ 786 for (i = 0; i < MTD_RX_LIST_CNT; i++) { 787 if (sc->mtd_cdata.mtd_rx_chain[i].sd_map->dm_nsegs != 0) { 788 bus_dmamap_t map = sc->mtd_cdata.mtd_rx_chain[i].sd_map; 789 790 bus_dmamap_sync(sc->sc_dmat, map, 0, map->dm_mapsize, 791 BUS_DMASYNC_POSTREAD); 792 bus_dmamap_unload(sc->sc_dmat, map); 793 } 794 if (sc->mtd_cdata.mtd_rx_chain[i].sd_mbuf != NULL) { 795 m_freem(sc->mtd_cdata.mtd_rx_chain[i].sd_mbuf); 796 sc->mtd_cdata.mtd_rx_chain[i].sd_mbuf = NULL; 797 } 798 } 799 bzero((char *)&sc->mtd_ldata->mtd_rx_list, 800 sizeof(sc->mtd_ldata->mtd_rx_list)); 801 802 /* 803 * Free the TX list buffers. 804 */ 805 for (i = 0; i < MTD_TX_LIST_CNT; i++) { 806 if (sc->mtd_cdata.mtd_tx_chain[i].sd_map->dm_nsegs != 0) { 807 bus_dmamap_t map = sc->mtd_cdata.mtd_tx_chain[i].sd_map; 808 809 bus_dmamap_sync(sc->sc_dmat, map, 0, map->dm_mapsize, 810 BUS_DMASYNC_POSTWRITE); 811 bus_dmamap_unload(sc->sc_dmat, map); 812 } 813 if (sc->mtd_cdata.mtd_tx_chain[i].sd_mbuf != NULL) { 814 m_freem(sc->mtd_cdata.mtd_tx_chain[i].sd_mbuf); 815 sc->mtd_cdata.mtd_tx_chain[i].sd_mbuf = NULL; 816 } 817 } 818 819 bzero((char *)&sc->mtd_ldata->mtd_tx_list, 820 sizeof(sc->mtd_ldata->mtd_tx_list)); 821 822} 823 824 825static void 826mtd_watchdog(struct ifnet *ifp) 827{ 828 struct mtd_softc *sc = ifp->if_softc; 829 830 ifp->if_oerrors++; 831 printf("%s: watchdog timeout\n", sc->sc_dev.dv_xname); 832 833 mtd_stop(ifp); 834 mtd_reset(sc); 835 mtd_init(ifp); 836 837 if (!IFQ_IS_EMPTY(&ifp->if_snd)) 838 mtd_start(ifp); 839} 840 841 842int 843mtd_intr(void *xsc) 844{ 845 struct mtd_softc *sc = xsc; 846 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 847 u_int32_t status; 848 int claimed = 0; 849 850 /* Supress unwanted interrupts */ 851 if (!(ifp->if_flags & IFF_RUNNING)) { 852 if (CSR_READ_4(MTD_ISR) & ISR_INTRS) 853 mtd_stop(ifp); 854 return (claimed); 855 } 856 857 /* Disable interrupts. */ 858 CSR_WRITE_4(MTD_IMR, 0); 859 860 while((status = CSR_READ_4(MTD_ISR)) & ISR_INTRS) { 861 claimed = 1; 862 863 CSR_WRITE_4(MTD_ISR, status); 864 865 /* RX interrupt. */ 866 if (status & ISR_RI) { 867 int curpkts = ifp->if_ipackets; 868 869 mtd_rxeof(sc); 870 if (curpkts == ifp->if_ipackets) 871 while(mtd_rx_resync(sc)) 872 mtd_rxeof(sc); 873 } 874 875 /* RX error interrupt. */ 876 if (status & (ISR_RXERI | ISR_RBU)) 877 ifp->if_ierrors++; 878 879 /* TX interrupt. */ 880 if (status & (ISR_TI | ISR_ETI | ISR_TBU)) 881 mtd_txeof(sc); 882 883 /* Fatal bus error interrupt. */ 884 if (status & ISR_FBE) { 885 mtd_reset(sc); 886 mtd_start(ifp); 887 } 888 } 889 890 /* Re-enable interrupts. */ 891 CSR_WRITE_4(MTD_IMR, IMR_INTRS); 892 893 if (!IFQ_IS_EMPTY(&ifp->if_snd)) 894 mtd_start(ifp); 895 896 return (claimed); 897} 898 899 900/* 901 * A frame has been uploaded: pass the resulting mbuf chain up to 902 * the higher level protocols. 903 */ 904static void 905mtd_rxeof(struct mtd_softc *sc) 906{ 907 struct mbuf *m; 908 struct ifnet *ifp; 909 struct mtd_rx_desc *cur_rx; 910 int i, total_len = 0; 911 u_int32_t rxstat; 912 913 ifp = &sc->sc_arpcom.ac_if; 914 i = sc->mtd_cdata.mtd_rx_prod; 915 916 while(!(sc->mtd_ldata->mtd_rx_list[i].rd_rsr & htole32(RSR_OWN))) { 917 struct mbuf *m0 = NULL; 918 919 bus_dmamap_sync(sc->sc_dmat, sc->sc_listmap, 920 offsetof(struct mtd_list_data, mtd_rx_list[i]), 921 sizeof(struct mtd_rx_desc), 922 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 923 924 cur_rx = &sc->mtd_ldata->mtd_rx_list[i]; 925 rxstat = letoh32(cur_rx->rd_rsr); 926 m = sc->mtd_cdata.mtd_rx_chain[i].sd_mbuf; 927 total_len = RSR_FLNG_GET(rxstat); 928 929 sc->mtd_cdata.mtd_rx_chain[i].sd_mbuf = NULL; 930 931 /* 932 * If an error occurs, update stats, clear the 933 * status word and leave the mbuf cluster in place: 934 * it should simply get re-used next time this descriptor 935 * comes up in the ring. 936 */ 937 if (rxstat & RSR_RXER) { 938 ifp->if_ierrors++; 939 mtd_newbuf(sc, i, m); 940 if (rxstat & RSR_CRC) { 941 i = (i + 1) % MTD_RX_LIST_CNT; 942 continue; 943 } else { 944 mtd_init(ifp); 945 return; 946 } 947 } 948 949 /* No errors; receive the packet. */ 950 total_len -= ETHER_CRC_LEN; 951 952 bus_dmamap_sync(sc->sc_dmat, sc->mtd_cdata.mtd_rx_chain[i].sd_map, 953 0, sc->mtd_cdata.mtd_rx_chain[i].sd_map->dm_mapsize, 954 BUS_DMASYNC_POSTREAD); 955 956 m0 = m_devget(mtod(m, char *) - ETHER_ALIGN, total_len + ETHER_ALIGN, 957 0, ifp, NULL); 958 mtd_newbuf(sc, i, m); 959 i = (i + 1) % MTD_RX_LIST_CNT; 960 if (m0 == NULL) { 961 ifp->if_ierrors++; 962 continue; 963 } 964 m_adj(m0, ETHER_ALIGN); 965 m = m0; 966 967 ifp->if_ipackets++; 968 969#if NBPFILTER > 0 970 if (ifp->if_bpf) 971 bpf_mtap(ifp->if_bpf, m); 972#endif 973 ether_input_mbuf(ifp, m); 974 } 975 976 sc->mtd_cdata.mtd_rx_prod = i; 977} 978 979 980/* 981 * This routine searches the RX ring for dirty descriptors in the 982 * event that the rxeof routine falls out of sync with the chip's 983 * current descriptor pointer. This may happen sometimes as a result 984 * of a "no RX buffer available" condition that happens when the chip 985 * consumes all of the RX buffers before the driver has a chance to 986 * process the RX ring. This routine may need to be called more than 987 * once to bring the driver back in sync with the chip, however we 988 * should still be getting RX DONE interrupts to drive the search 989 * for new packets in the RX ring, so we should catch up eventually. 990 */ 991static int 992mtd_rx_resync(sc) 993 struct mtd_softc *sc; 994{ 995 int i, pos; 996 struct mtd_rx_desc *cur_rx; 997 998 pos = sc->mtd_cdata.mtd_rx_prod; 999 1000 for (i = 0; i < MTD_RX_LIST_CNT; i++) { 1001 bus_dmamap_sync(sc->sc_dmat, sc->sc_listmap, 1002 offsetof(struct mtd_list_data, mtd_rx_list[pos]), 1003 sizeof(struct mtd_rx_desc), 1004 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1005 1006 cur_rx = &sc->mtd_ldata->mtd_rx_list[pos]; 1007 if (!(cur_rx->rd_rsr & htole32(RSR_OWN))) 1008 break; 1009 pos = (pos + 1) % MTD_RX_LIST_CNT; 1010 } 1011 1012 /* If the ring really is empty, then just return. */ 1013 if (i == MTD_RX_LIST_CNT) 1014 return (0); 1015 1016 /* We've fallen behind the chip: catch it. */ 1017 sc->mtd_cdata.mtd_rx_prod = pos; 1018 1019 return (EAGAIN); 1020} 1021 1022 1023/* 1024 * A frame was downloaded to the chip. It's safe for us to clean up 1025 * the list buffers. 1026 */ 1027static void 1028mtd_txeof(struct mtd_softc *sc) 1029{ 1030 struct mtd_tx_desc *cur_tx = NULL; 1031 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 1032 int idx; 1033 1034 /* Clear the timeout timer. */ 1035 ifp->if_timer = 0; 1036 1037 /* 1038 * Go through our tx list and free mbufs for those 1039 * frames that have been transmitted. 1040 */ 1041 idx = sc->mtd_cdata.mtd_tx_cons; 1042 while(idx != sc->mtd_cdata.mtd_tx_prod) { 1043 u_int32_t txstat; 1044 1045 bus_dmamap_sync(sc->sc_dmat, sc->sc_listmap, 1046 offsetof(struct mtd_list_data, mtd_tx_list[idx]), 1047 sizeof(struct mtd_tx_desc), 1048 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1049 1050 cur_tx = &sc->mtd_ldata->mtd_tx_list[idx]; 1051 txstat = letoh32(cur_tx->td_tsw); 1052 1053 if (txstat & TSW_OWN || txstat == TSW_UNSENT) 1054 break; 1055 1056 if (!(cur_tx->td_tcw & htole32(TCW_LD))) { 1057 sc->mtd_cdata.mtd_tx_cnt--; 1058 idx = (idx + 1) % MTD_TX_LIST_CNT; 1059 continue; 1060 } 1061 1062 if (CSR_READ_4(MTD_TCRRCR) & TCR_ENHANCED) 1063 ifp->if_collisions += TSR_NCR_GET(CSR_READ_4(MTD_TSR)); 1064 else { 1065 if (txstat & TSW_TXERR) { 1066 ifp->if_oerrors++; 1067 if (txstat & TSW_EC) 1068 ifp->if_collisions++; 1069 if (txstat & TSW_LC) 1070 ifp->if_collisions++; 1071 } 1072 ifp->if_collisions += TSW_NCR_GET(txstat); 1073 } 1074 1075 ifp->if_opackets++; 1076 if (sc->mtd_cdata.mtd_tx_chain[idx].sd_map->dm_nsegs != 0) { 1077 bus_dmamap_t map = 1078 sc->mtd_cdata.mtd_tx_chain[idx].sd_map; 1079 bus_dmamap_sync(sc->sc_dmat, map, 0, map->dm_mapsize, 1080 BUS_DMASYNC_POSTWRITE); 1081 bus_dmamap_unload(sc->sc_dmat, map); 1082 } 1083 if (sc->mtd_cdata.mtd_tx_chain[idx].sd_mbuf != NULL) { 1084 m_freem(sc->mtd_cdata.mtd_tx_chain[idx].sd_mbuf); 1085 sc->mtd_cdata.mtd_tx_chain[idx].sd_mbuf = NULL; 1086 } 1087 sc->mtd_cdata.mtd_tx_cnt--; 1088 idx = (idx + 1) % MTD_TX_LIST_CNT; 1089 } 1090 1091 if (cur_tx != NULL) { 1092 ifp->if_flags &= ~IFF_OACTIVE; 1093 sc->mtd_cdata.mtd_tx_cons = idx; 1094 } else 1095 if (sc->mtd_ldata->mtd_tx_list[idx].td_tsw == 1096 htole32(TSW_UNSENT)) { 1097 sc->mtd_ldata->mtd_tx_list[idx].td_tsw = 1098 htole32(TSW_OWN); 1099 ifp->if_timer = 5; 1100 CSR_WRITE_4(MTD_TXPDR, 0xffffffff); 1101 } 1102} 1103 1104struct cfdriver mtd_cd = { 1105 0, "mtd", DV_IFNET 1106}; 1107