if_mec.c revision 1.30
1 /* $NetBSD: if_mec.c,v 1.30 2008/08/14 03:48:43 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 Izumi Tsutsui. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 /* 28 * Copyright (c) 2003 Christopher SEKIYA 29 * All rights reserved. 30 * 31 * Redistribution and use in source and binary forms, with or without 32 * modification, are permitted provided that the following conditions 33 * are met: 34 * 1. Redistributions of source code must retain the above copyright 35 * notice, this list of conditions and the following disclaimer. 36 * 2. Redistributions in binary form must reproduce the above copyright 37 * notice, this list of conditions and the following disclaimer in the 38 * documentation and/or other materials provided with the distribution. 39 * 3. All advertising materials mentioning features or use of this software 40 * must display the following acknowledgement: 41 * This product includes software developed for the 42 * NetBSD Project. See http://www.NetBSD.org/ for 43 * information about NetBSD. 44 * 4. The name of the author may not be used to endorse or promote products 45 * derived from this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 */ 58 59 /* 60 * MACE MAC-110 Ethernet driver 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: if_mec.c,v 1.30 2008/08/14 03:48:43 tsutsui Exp $"); 65 66 #include "opt_ddb.h" 67 #include "bpfilter.h" 68 #include "rnd.h" 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/device.h> 73 #include <sys/callout.h> 74 #include <sys/mbuf.h> 75 #include <sys/malloc.h> 76 #include <sys/kernel.h> 77 #include <sys/socket.h> 78 #include <sys/ioctl.h> 79 #include <sys/errno.h> 80 81 #if NRND > 0 82 #include <sys/rnd.h> 83 #endif 84 85 #include <net/if.h> 86 #include <net/if_dl.h> 87 #include <net/if_media.h> 88 #include <net/if_ether.h> 89 90 #if NBPFILTER > 0 91 #include <net/bpf.h> 92 #endif 93 94 #include <machine/bus.h> 95 #include <machine/intr.h> 96 #include <machine/machtype.h> 97 98 #include <dev/mii/mii.h> 99 #include <dev/mii/miivar.h> 100 101 #include <sgimips/mace/macevar.h> 102 #include <sgimips/mace/if_mecreg.h> 103 104 #include <dev/arcbios/arcbios.h> 105 #include <dev/arcbios/arcbiosvar.h> 106 107 /* #define MEC_DEBUG */ 108 109 #ifdef MEC_DEBUG 110 #define MEC_DEBUG_RESET 0x01 111 #define MEC_DEBUG_START 0x02 112 #define MEC_DEBUG_STOP 0x04 113 #define MEC_DEBUG_INTR 0x08 114 #define MEC_DEBUG_RXINTR 0x10 115 #define MEC_DEBUG_TXINTR 0x20 116 uint32_t mec_debug = 0; 117 #define DPRINTF(x, y) if (mec_debug & (x)) printf y 118 #else 119 #define DPRINTF(x, y) /* nothing */ 120 #endif 121 122 /* 123 * Transmit descriptor list size 124 */ 125 #define MEC_NTXDESC 64 126 #define MEC_NTXDESC_MASK (MEC_NTXDESC - 1) 127 #define MEC_NEXTTX(x) (((x) + 1) & MEC_NTXDESC_MASK) 128 #define MEC_NTXDESC_RSVD 4 129 #define MEC_NTXDESC_INTR 8 130 131 /* 132 * software state for TX 133 */ 134 struct mec_txsoft { 135 struct mbuf *txs_mbuf; /* head of our mbuf chain */ 136 bus_dmamap_t txs_dmamap; /* our DMA map */ 137 uint32_t txs_flags; 138 #define MEC_TXS_BUFLEN_MASK 0x0000007f /* data len in txd_buf */ 139 #define MEC_TXS_TXDBUF 0x00000080 /* txd_buf is used */ 140 #define MEC_TXS_TXDPTR1 0x00000100 /* txd_ptr[0] is used */ 141 }; 142 143 /* 144 * Transmit buffer descriptor 145 */ 146 #define MEC_TXDESCSIZE 128 147 #define MEC_NTXPTR 3 148 #define MEC_TXD_BUFOFFSET \ 149 (sizeof(uint64_t) + MEC_NTXPTR * sizeof(uint64_t)) 150 #define MEC_TXD_BUFSIZE (MEC_TXDESCSIZE - MEC_TXD_BUFOFFSET) 151 #define MEC_TXD_BUFSTART(len) (MEC_TXD_BUFSIZE - (len)) 152 #define MEC_TXD_ALIGN 8 153 #define MEC_TXD_ROUNDUP(addr) \ 154 (((addr) + (MEC_TXD_ALIGN - 1)) & ~((uint64_t)MEC_TXD_ALIGN - 1)) 155 156 struct mec_txdesc { 157 volatile uint64_t txd_cmd; 158 #define MEC_TXCMD_DATALEN 0x000000000000ffff /* data length */ 159 #define MEC_TXCMD_BUFSTART 0x00000000007f0000 /* start byte offset */ 160 #define TXCMD_BUFSTART(x) ((x) << 16) 161 #define MEC_TXCMD_TERMDMA 0x0000000000800000 /* stop DMA on abort */ 162 #define MEC_TXCMD_TXINT 0x0000000001000000 /* INT after TX done */ 163 #define MEC_TXCMD_PTR1 0x0000000002000000 /* valid 1st txd_ptr */ 164 #define MEC_TXCMD_PTR2 0x0000000004000000 /* valid 2nd txd_ptr */ 165 #define MEC_TXCMD_PTR3 0x0000000008000000 /* valid 3rd txd_ptr */ 166 #define MEC_TXCMD_UNUSED 0xfffffffff0000000ULL /* should be zero */ 167 168 #define txd_stat txd_cmd 169 #define MEC_TXSTAT_LEN 0x000000000000ffff /* TX length */ 170 #define MEC_TXSTAT_COLCNT 0x00000000000f0000 /* collision count */ 171 #define MEC_TXSTAT_COLCNT_SHIFT 16 172 #define MEC_TXSTAT_LATE_COL 0x0000000000100000 /* late collision */ 173 #define MEC_TXSTAT_CRCERROR 0x0000000000200000 /* */ 174 #define MEC_TXSTAT_DEFERRED 0x0000000000400000 /* */ 175 #define MEC_TXSTAT_SUCCESS 0x0000000000800000 /* TX complete */ 176 #define MEC_TXSTAT_TOOBIG 0x0000000001000000 /* */ 177 #define MEC_TXSTAT_UNDERRUN 0x0000000002000000 /* */ 178 #define MEC_TXSTAT_COLLISIONS 0x0000000004000000 /* */ 179 #define MEC_TXSTAT_EXDEFERRAL 0x0000000008000000 /* */ 180 #define MEC_TXSTAT_COLLIDED 0x0000000010000000 /* */ 181 #define MEC_TXSTAT_UNUSED 0x7fffffffe0000000ULL /* should be zero */ 182 #define MEC_TXSTAT_SENT 0x8000000000000000ULL /* packet sent */ 183 184 uint64_t txd_ptr[MEC_NTXPTR]; 185 #define MEC_TXPTR_UNUSED2 0x0000000000000007 /* should be zero */ 186 #define MEC_TXPTR_DMAADDR 0x00000000fffffff8 /* TX DMA address */ 187 #define MEC_TXPTR_LEN 0x0000ffff00000000ULL /* buffer length */ 188 #define TXPTR_LEN(x) ((uint64_t)(x) << 32) 189 #define MEC_TXPTR_UNUSED1 0xffff000000000000ULL /* should be zero */ 190 191 uint8_t txd_buf[MEC_TXD_BUFSIZE]; 192 }; 193 194 /* 195 * Receive buffer size 196 */ 197 #define MEC_NRXDESC 16 198 #define MEC_NRXDESC_MASK (MEC_NRXDESC - 1) 199 #define MEC_NEXTRX(x) (((x) + 1) & MEC_NRXDESC_MASK) 200 201 /* 202 * Receive buffer description 203 */ 204 #define MEC_RXDESCSIZE 4096 /* umm, should be 4kbyte aligned */ 205 #define MEC_RXD_NRXPAD 3 206 #define MEC_RXD_DMAOFFSET (1 + MEC_RXD_NRXPAD) 207 #define MEC_RXD_BUFOFFSET (MEC_RXD_DMAOFFSET * sizeof(uint64_t)) 208 #define MEC_RXD_BUFSIZE (MEC_RXDESCSIZE - MEC_RXD_BUFOFFSET) 209 210 struct mec_rxdesc { 211 volatile uint64_t rxd_stat; 212 #define MEC_RXSTAT_LEN 0x000000000000ffff /* data length */ 213 #define MEC_RXSTAT_VIOLATION 0x0000000000010000 /* code violation (?) */ 214 #define MEC_RXSTAT_UNUSED2 0x0000000000020000 /* unknown (?) */ 215 #define MEC_RXSTAT_CRCERROR 0x0000000000040000 /* CRC error */ 216 #define MEC_RXSTAT_MULTICAST 0x0000000000080000 /* multicast packet */ 217 #define MEC_RXSTAT_BROADCAST 0x0000000000100000 /* broadcast packet */ 218 #define MEC_RXSTAT_INVALID 0x0000000000200000 /* invalid preamble */ 219 #define MEC_RXSTAT_LONGEVENT 0x0000000000400000 /* long packet */ 220 #define MEC_RXSTAT_BADPACKET 0x0000000000800000 /* bad packet */ 221 #define MEC_RXSTAT_CAREVENT 0x0000000001000000 /* carrier event */ 222 #define MEC_RXSTAT_MATCHMCAST 0x0000000002000000 /* match multicast */ 223 #define MEC_RXSTAT_MATCHMAC 0x0000000004000000 /* match MAC */ 224 #define MEC_RXSTAT_SEQNUM 0x00000000f8000000 /* sequence number */ 225 #define MEC_RXSTAT_CKSUM 0x0000ffff00000000ULL /* IP checksum */ 226 #define MEC_RXSTAT_UNUSED1 0x7fff000000000000ULL /* should be zero */ 227 #define MEC_RXSTAT_RECEIVED 0x8000000000000000ULL /* set to 1 on RX */ 228 uint64_t rxd_pad1[MEC_RXD_NRXPAD]; 229 uint8_t rxd_buf[MEC_RXD_BUFSIZE]; 230 }; 231 232 /* 233 * control structures for DMA ops 234 */ 235 struct mec_control_data { 236 /* 237 * TX descriptors and buffers 238 */ 239 struct mec_txdesc mcd_txdesc[MEC_NTXDESC]; 240 241 /* 242 * RX descriptors and buffers 243 */ 244 struct mec_rxdesc mcd_rxdesc[MEC_NRXDESC]; 245 }; 246 247 /* 248 * It _seems_ there are some restrictions on descriptor address: 249 * 250 * - Base address of txdescs should be 8kbyte aligned 251 * - Each txdesc should be 128byte aligned 252 * - Each rxdesc should be 4kbyte aligned 253 * 254 * So we should specify 8k align to allocalte txdescs. 255 * In this case, sizeof(struct mec_txdesc) * MEC_NTXDESC is 8192 256 * so rxdescs are also allocated at 4kbyte aligned. 257 */ 258 #define MEC_CONTROL_DATA_ALIGN (8 * 1024) 259 260 #define MEC_CDOFF(x) offsetof(struct mec_control_data, x) 261 #define MEC_CDTXOFF(x) MEC_CDOFF(mcd_txdesc[(x)]) 262 #define MEC_CDRXOFF(x) MEC_CDOFF(mcd_rxdesc[(x)]) 263 264 /* 265 * software state per device 266 */ 267 struct mec_softc { 268 device_t sc_dev; /* generic device structures */ 269 270 bus_space_tag_t sc_st; /* bus_space tag */ 271 bus_space_handle_t sc_sh; /* bus_space handle */ 272 bus_dma_tag_t sc_dmat; /* bus_dma tag */ 273 void *sc_sdhook; /* shutdown hook */ 274 275 struct ethercom sc_ethercom; /* Ethernet common part */ 276 277 struct mii_data sc_mii; /* MII/media information */ 278 int sc_phyaddr; /* MII address */ 279 struct callout sc_tick_ch; /* tick callout */ 280 281 uint8_t sc_enaddr[ETHER_ADDR_LEN]; /* MAC address */ 282 283 bus_dmamap_t sc_cddmamap; /* bus_dma map for control data */ 284 #define sc_cddma sc_cddmamap->dm_segs[0].ds_addr 285 286 /* pointer to allocated control data */ 287 struct mec_control_data *sc_control_data; 288 #define sc_txdesc sc_control_data->mcd_txdesc 289 #define sc_rxdesc sc_control_data->mcd_rxdesc 290 291 /* software state for TX descs */ 292 struct mec_txsoft sc_txsoft[MEC_NTXDESC]; 293 294 int sc_txpending; /* number of TX requests pending */ 295 int sc_txdirty; /* first dirty TX descriptor */ 296 int sc_txlast; /* last used TX descriptor */ 297 298 int sc_rxptr; /* next ready RX buffer */ 299 300 #if NRND > 0 301 rndsource_element_t sc_rnd_source; /* random source */ 302 #endif 303 }; 304 305 #define MEC_CDTXADDR(sc, x) ((sc)->sc_cddma + MEC_CDTXOFF(x)) 306 #define MEC_CDRXADDR(sc, x) ((sc)->sc_cddma + MEC_CDRXOFF(x)) 307 308 #define MEC_TXDESCSYNC(sc, x, ops) \ 309 bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \ 310 MEC_CDTXOFF(x), MEC_TXDESCSIZE, (ops)) 311 #define MEC_TXCMDSYNC(sc, x, ops) \ 312 bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \ 313 MEC_CDTXOFF(x), sizeof(uint64_t), (ops)) 314 315 #define MEC_RXSTATSYNC(sc, x, ops) \ 316 bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \ 317 MEC_CDRXOFF(x), sizeof(uint64_t), (ops)) 318 #define MEC_RXBUFSYNC(sc, x, len, ops) \ 319 bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \ 320 MEC_CDRXOFF(x) + MEC_RXD_BUFOFFSET, \ 321 MEC_ETHER_ALIGN + (len), (ops)) 322 323 /* XXX these values should be moved to <net/if_ether.h> ? */ 324 #define ETHER_PAD_LEN (ETHER_MIN_LEN - ETHER_CRC_LEN) 325 #define MEC_ETHER_ALIGN 2 326 327 static int mec_match(device_t, cfdata_t, void *); 328 static void mec_attach(device_t, device_t, void *); 329 330 static int mec_mii_readreg(device_t, int, int); 331 static void mec_mii_writereg(device_t, int, int, int); 332 static int mec_mii_wait(struct mec_softc *); 333 static void mec_statchg(device_t); 334 335 static void enaddr_aton(const char *, uint8_t *); 336 337 static int mec_init(struct ifnet * ifp); 338 static void mec_start(struct ifnet *); 339 static void mec_watchdog(struct ifnet *); 340 static void mec_tick(void *); 341 static int mec_ioctl(struct ifnet *, u_long, void *); 342 static void mec_reset(struct mec_softc *); 343 static void mec_setfilter(struct mec_softc *); 344 static int mec_intr(void *arg); 345 static void mec_stop(struct ifnet *, int); 346 static void mec_rxintr(struct mec_softc *); 347 static void mec_txintr(struct mec_softc *, uint32_t); 348 static void mec_shutdown(void *); 349 350 CFATTACH_DECL_NEW(mec, sizeof(struct mec_softc), 351 mec_match, mec_attach, NULL, NULL); 352 353 static int mec_matched = 0; 354 355 static int 356 mec_match(device_t parent, cfdata_t cf, void *aux) 357 { 358 359 /* allow only one device */ 360 if (mec_matched) 361 return 0; 362 363 mec_matched = 1; 364 return 1; 365 } 366 367 static void 368 mec_attach(device_t parent, device_t self, void *aux) 369 { 370 struct mec_softc *sc = device_private(self); 371 struct mace_attach_args *maa = aux; 372 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 373 uint64_t address, command; 374 const char *macaddr; 375 struct mii_softc *child; 376 bus_dma_segment_t seg; 377 int i, err, rseg; 378 bool mac_is_fake; 379 380 sc->sc_dev = self; 381 sc->sc_st = maa->maa_st; 382 if (bus_space_subregion(sc->sc_st, maa->maa_sh, 383 maa->maa_offset, 0, &sc->sc_sh) != 0) { 384 aprint_error(": can't map i/o space\n"); 385 return; 386 } 387 388 /* set up DMA structures */ 389 sc->sc_dmat = maa->maa_dmat; 390 391 /* 392 * Allocate the control data structures, and create and load the 393 * DMA map for it. 394 */ 395 if ((err = bus_dmamem_alloc(sc->sc_dmat, 396 sizeof(struct mec_control_data), MEC_CONTROL_DATA_ALIGN, 0, 397 &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 398 aprint_error(": unable to allocate control data, error = %d\n", 399 err); 400 goto fail_0; 401 } 402 /* 403 * XXX needs re-think... 404 * control data structures contain whole RX data buffer, so 405 * BUS_DMA_COHERENT (which disables cache) may cause some performance 406 * issue on copying data from the RX buffer to mbuf on normal memory, 407 * though we have to make sure all bus_dmamap_sync(9) ops are called 408 * properly in that case. 409 */ 410 if ((err = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 411 sizeof(struct mec_control_data), 412 (void **)&sc->sc_control_data, /*BUS_DMA_COHERENT*/ 0)) != 0) { 413 aprint_error(": unable to map control data, error = %d\n", err); 414 goto fail_1; 415 } 416 memset(sc->sc_control_data, 0, sizeof(struct mec_control_data)); 417 418 if ((err = bus_dmamap_create(sc->sc_dmat, 419 sizeof(struct mec_control_data), 1, 420 sizeof(struct mec_control_data), 0, 0, &sc->sc_cddmamap)) != 0) { 421 aprint_error(": unable to create control data DMA map," 422 " error = %d\n", err); 423 goto fail_2; 424 } 425 if ((err = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 426 sc->sc_control_data, sizeof(struct mec_control_data), NULL, 427 BUS_DMA_NOWAIT)) != 0) { 428 aprint_error(": unable to load control data DMA map," 429 " error = %d\n", err); 430 goto fail_3; 431 } 432 433 /* create TX buffer DMA maps */ 434 for (i = 0; i < MEC_NTXDESC; i++) { 435 if ((err = bus_dmamap_create(sc->sc_dmat, 436 MCLBYTES, 1, MCLBYTES, PAGE_SIZE, 0, 437 &sc->sc_txsoft[i].txs_dmamap)) != 0) { 438 aprint_error(": unable to create tx DMA map %d," 439 " error = %d\n", i, err); 440 goto fail_4; 441 } 442 } 443 444 callout_init(&sc->sc_tick_ch, 0); 445 446 /* get Ethernet address from ARCBIOS */ 447 if ((macaddr = ARCBIOS->GetEnvironmentVariable("eaddr")) == NULL) { 448 aprint_error(": unable to get MAC address!\n"); 449 goto fail_4; 450 } 451 /* 452 * On some machines the DS2502 chip storing the serial number/ 453 * mac address is on the pci riser board - if this board is 454 * missing, ARCBIOS will not know a good ethernet address (but 455 * otherwise the machine will work fine). 456 */ 457 mac_is_fake = false; 458 if (strcmp(macaddr, "ff:ff:ff:ff:ff:ff") == 0) { 459 uint32_t ui = 0; 460 const char * netaddr = 461 ARCBIOS->GetEnvironmentVariable("netaddr"); 462 463 /* 464 * Create a MAC address by abusing the "netaddr" env var 465 */ 466 sc->sc_enaddr[0] = 0xf2; 467 sc->sc_enaddr[1] = 0x0b; 468 sc->sc_enaddr[2] = 0xa4; 469 if (netaddr) { 470 mac_is_fake = true; 471 while (*netaddr) { 472 int v = 0; 473 while (*netaddr && *netaddr != '.') { 474 if (*netaddr >= '0' && *netaddr <= '9') 475 v = v*10 + (*netaddr - '0'); 476 netaddr++; 477 } 478 ui <<= 8; 479 ui |= v; 480 if (*netaddr == '.') 481 netaddr++; 482 } 483 } 484 memcpy(sc->sc_enaddr+3, ((uint8_t *)&ui)+1, 3); 485 } 486 if (!mac_is_fake) 487 enaddr_aton(macaddr, sc->sc_enaddr); 488 489 /* set the Ethernet address */ 490 address = 0; 491 for (i = 0; i < ETHER_ADDR_LEN; i++) { 492 address = address << 8; 493 address |= sc->sc_enaddr[i]; 494 } 495 bus_space_write_8(sc->sc_st, sc->sc_sh, MEC_STATION, address); 496 497 /* reset device */ 498 mec_reset(sc); 499 500 command = bus_space_read_8(sc->sc_st, sc->sc_sh, MEC_MAC_CONTROL); 501 502 aprint_normal(": MAC-110 Ethernet, rev %u\n", 503 (u_int)((command & MEC_MAC_REVISION) >> MEC_MAC_REVISION_SHIFT)); 504 505 if (mac_is_fake) 506 aprint_normal_dev(self, 507 "could not get ethernet address from firmware" 508 " - generated one from the \"netaddr\" environment" 509 " variable\n"); 510 aprint_normal_dev(self, "Ethernet address %s\n", 511 ether_sprintf(sc->sc_enaddr)); 512 513 /* Done, now attach everything */ 514 515 sc->sc_mii.mii_ifp = ifp; 516 sc->sc_mii.mii_readreg = mec_mii_readreg; 517 sc->sc_mii.mii_writereg = mec_mii_writereg; 518 sc->sc_mii.mii_statchg = mec_statchg; 519 520 /* Set up PHY properties */ 521 sc->sc_ethercom.ec_mii = &sc->sc_mii; 522 ifmedia_init(&sc->sc_mii.mii_media, 0, ether_mediachange, 523 ether_mediastatus); 524 mii_attach(self, &sc->sc_mii, 0xffffffff, MII_PHY_ANY, 525 MII_OFFSET_ANY, 0); 526 527 child = LIST_FIRST(&sc->sc_mii.mii_phys); 528 if (child == NULL) { 529 /* No PHY attached */ 530 ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER | IFM_MANUAL, 531 0, NULL); 532 ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER | IFM_MANUAL); 533 } else { 534 ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER | IFM_AUTO); 535 sc->sc_phyaddr = child->mii_phy; 536 } 537 538 strcpy(ifp->if_xname, device_xname(self)); 539 ifp->if_softc = sc; 540 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 541 ifp->if_ioctl = mec_ioctl; 542 ifp->if_start = mec_start; 543 ifp->if_watchdog = mec_watchdog; 544 ifp->if_init = mec_init; 545 ifp->if_stop = mec_stop; 546 ifp->if_mtu = ETHERMTU; 547 IFQ_SET_READY(&ifp->if_snd); 548 549 if_attach(ifp); 550 ether_ifattach(ifp, sc->sc_enaddr); 551 552 /* establish interrupt */ 553 cpu_intr_establish(maa->maa_intr, maa->maa_intrmask, mec_intr, sc); 554 555 #if NRND > 0 556 rnd_attach_source(&sc->sc_rnd_source, device_xname(self), 557 RND_TYPE_NET, 0); 558 #endif 559 560 /* set shutdown hook to reset interface on powerdown */ 561 sc->sc_sdhook = shutdownhook_establish(mec_shutdown, sc); 562 563 return; 564 565 /* 566 * Free any resources we've allocated during the failed attach 567 * attempt. Do this in reverse order and fall though. 568 */ 569 fail_4: 570 for (i = 0; i < MEC_NTXDESC; i++) { 571 if (sc->sc_txsoft[i].txs_dmamap != NULL) 572 bus_dmamap_destroy(sc->sc_dmat, 573 sc->sc_txsoft[i].txs_dmamap); 574 } 575 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 576 fail_3: 577 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 578 fail_2: 579 bus_dmamem_unmap(sc->sc_dmat, (void *)sc->sc_control_data, 580 sizeof(struct mec_control_data)); 581 fail_1: 582 bus_dmamem_free(sc->sc_dmat, &seg, rseg); 583 fail_0: 584 return; 585 } 586 587 static int 588 mec_mii_readreg(device_t self, int phy, int reg) 589 { 590 struct mec_softc *sc = device_private(self); 591 bus_space_tag_t st = sc->sc_st; 592 bus_space_handle_t sh = sc->sc_sh; 593 uint64_t val; 594 int i; 595 596 if (mec_mii_wait(sc) != 0) 597 return 0; 598 599 bus_space_write_8(st, sh, MEC_PHY_ADDRESS, 600 (phy << MEC_PHY_ADDR_DEVSHIFT) | (reg & MEC_PHY_ADDR_REGISTER)); 601 delay(25); 602 bus_space_write_8(st, sh, MEC_PHY_READ_INITIATE, 1); 603 delay(25); 604 mec_mii_wait(sc); 605 606 for (i = 0; i < 20; i++) { 607 delay(30); 608 609 val = bus_space_read_8(st, sh, MEC_PHY_DATA); 610 611 if ((val & MEC_PHY_DATA_BUSY) == 0) 612 return val & MEC_PHY_DATA_VALUE; 613 } 614 return 0; 615 } 616 617 static void 618 mec_mii_writereg(device_t self, int phy, int reg, int val) 619 { 620 struct mec_softc *sc = device_private(self); 621 bus_space_tag_t st = sc->sc_st; 622 bus_space_handle_t sh = sc->sc_sh; 623 624 if (mec_mii_wait(sc) != 0) { 625 printf("timed out writing %x: %x\n", reg, val); 626 return; 627 } 628 629 bus_space_write_8(st, sh, MEC_PHY_ADDRESS, 630 (phy << MEC_PHY_ADDR_DEVSHIFT) | (reg & MEC_PHY_ADDR_REGISTER)); 631 632 delay(60); 633 634 bus_space_write_8(st, sh, MEC_PHY_DATA, val & MEC_PHY_DATA_VALUE); 635 636 delay(60); 637 638 mec_mii_wait(sc); 639 } 640 641 static int 642 mec_mii_wait(struct mec_softc *sc) 643 { 644 uint32_t busy; 645 int i, s; 646 647 for (i = 0; i < 100; i++) { 648 delay(30); 649 650 s = splhigh(); 651 busy = bus_space_read_8(sc->sc_st, sc->sc_sh, MEC_PHY_DATA); 652 splx(s); 653 654 if ((busy & MEC_PHY_DATA_BUSY) == 0) 655 return 0; 656 #if 0 657 if (busy == 0xffff) /* XXX ? */ 658 return 0; 659 #endif 660 } 661 662 printf("%s: MII timed out\n", device_xname(sc->sc_dev)); 663 return 1; 664 } 665 666 static void 667 mec_statchg(device_t self) 668 { 669 struct mec_softc *sc = device_private(self); 670 bus_space_tag_t st = sc->sc_st; 671 bus_space_handle_t sh = sc->sc_sh; 672 uint32_t control; 673 674 control = bus_space_read_8(st, sh, MEC_MAC_CONTROL); 675 control &= ~(MEC_MAC_IPGT | MEC_MAC_IPGR1 | MEC_MAC_IPGR2 | 676 MEC_MAC_FULL_DUPLEX | MEC_MAC_SPEED_SELECT); 677 678 /* must also set IPG here for duplex stuff ... */ 679 if ((sc->sc_mii.mii_media_active & IFM_FDX) != 0) { 680 control |= MEC_MAC_FULL_DUPLEX; 681 } else { 682 /* set IPG */ 683 control |= MEC_MAC_IPG_DEFAULT; 684 } 685 686 bus_space_write_8(st, sh, MEC_MAC_CONTROL, control); 687 } 688 689 /* 690 * XXX 691 * maybe this function should be moved to common part 692 * (sgimips/machdep.c or elsewhere) for all on-board network devices. 693 */ 694 static void 695 enaddr_aton(const char *str, uint8_t *eaddr) 696 { 697 int i; 698 char c; 699 700 for (i = 0; i < ETHER_ADDR_LEN; i++) { 701 if (*str == ':') 702 str++; 703 704 c = *str++; 705 if (isdigit(c)) { 706 eaddr[i] = (c - '0'); 707 } else if (isxdigit(c)) { 708 eaddr[i] = (toupper(c) + 10 - 'A'); 709 } 710 c = *str++; 711 if (isdigit(c)) { 712 eaddr[i] = (eaddr[i] << 4) | (c - '0'); 713 } else if (isxdigit(c)) { 714 eaddr[i] = (eaddr[i] << 4) | (toupper(c) + 10 - 'A'); 715 } 716 } 717 } 718 719 static int 720 mec_init(struct ifnet *ifp) 721 { 722 struct mec_softc *sc = ifp->if_softc; 723 bus_space_tag_t st = sc->sc_st; 724 bus_space_handle_t sh = sc->sc_sh; 725 struct mec_rxdesc *rxd; 726 int i, rc; 727 728 /* cancel any pending I/O */ 729 mec_stop(ifp, 0); 730 731 /* reset device */ 732 mec_reset(sc); 733 734 /* setup filter for multicast or promisc mode */ 735 mec_setfilter(sc); 736 737 /* set the TX ring pointer to the base address */ 738 bus_space_write_8(st, sh, MEC_TX_RING_BASE, MEC_CDTXADDR(sc, 0)); 739 740 sc->sc_txpending = 0; 741 sc->sc_txdirty = 0; 742 sc->sc_txlast = MEC_NTXDESC - 1; 743 744 /* put RX buffers into FIFO */ 745 for (i = 0; i < MEC_NRXDESC; i++) { 746 rxd = &sc->sc_rxdesc[i]; 747 rxd->rxd_stat = 0; 748 MEC_RXSTATSYNC(sc, i, BUS_DMASYNC_PREREAD); 749 MEC_RXBUFSYNC(sc, i, ETHER_MAX_LEN, BUS_DMASYNC_PREREAD); 750 bus_space_write_8(st, sh, MEC_MCL_RX_FIFO, MEC_CDRXADDR(sc, i)); 751 } 752 sc->sc_rxptr = 0; 753 754 #if 0 /* XXX no info */ 755 bus_space_write_8(st, sh, MEC_TIMER, 0); 756 #endif 757 758 /* 759 * MEC_DMA_TX_INT_ENABLE will be set later otherwise it causes 760 * spurious interrupts when TX buffers are empty 761 */ 762 bus_space_write_8(st, sh, MEC_DMA_CONTROL, 763 (MEC_RXD_DMAOFFSET << MEC_DMA_RX_DMA_OFFSET_SHIFT) | 764 (MEC_NRXDESC << MEC_DMA_RX_INT_THRESH_SHIFT) | 765 MEC_DMA_TX_DMA_ENABLE | /* MEC_DMA_TX_INT_ENABLE | */ 766 MEC_DMA_RX_DMA_ENABLE | MEC_DMA_RX_INT_ENABLE); 767 768 callout_reset(&sc->sc_tick_ch, hz, mec_tick, sc); 769 770 if ((rc = ether_mediachange(ifp)) != 0) 771 return rc; 772 773 ifp->if_flags |= IFF_RUNNING; 774 ifp->if_flags &= ~IFF_OACTIVE; 775 mec_start(ifp); 776 777 return 0; 778 } 779 780 static void 781 mec_reset(struct mec_softc *sc) 782 { 783 bus_space_tag_t st = sc->sc_st; 784 bus_space_handle_t sh = sc->sc_sh; 785 uint64_t control; 786 787 /* stop DMA first */ 788 bus_space_write_8(st, sh, MEC_DMA_CONTROL, 0); 789 790 /* reset chip */ 791 bus_space_write_8(st, sh, MEC_MAC_CONTROL, MEC_MAC_CORE_RESET); 792 delay(1000); 793 bus_space_write_8(st, sh, MEC_MAC_CONTROL, 0); 794 delay(1000); 795 796 /* Default to 100/half and let auto-negotiation work its magic */ 797 control = MEC_MAC_SPEED_SELECT | MEC_MAC_FILTER_MATCHMULTI | 798 MEC_MAC_IPG_DEFAULT; 799 800 bus_space_write_8(st, sh, MEC_MAC_CONTROL, control); 801 /* stop DMA again for sanity */ 802 bus_space_write_8(st, sh, MEC_DMA_CONTROL, 0); 803 804 DPRINTF(MEC_DEBUG_RESET, ("mec: control now %llx\n", 805 bus_space_read_8(st, sh, MEC_MAC_CONTROL))); 806 } 807 808 static void 809 mec_start(struct ifnet *ifp) 810 { 811 struct mec_softc *sc = ifp->if_softc; 812 struct mbuf *m0, *m; 813 struct mec_txdesc *txd; 814 struct mec_txsoft *txs; 815 bus_dmamap_t dmamap; 816 bus_space_tag_t st = sc->sc_st; 817 bus_space_handle_t sh = sc->sc_sh; 818 uint64_t txdaddr; 819 int error, firsttx, nexttx, opending; 820 int len, bufoff, buflen, unaligned, txdlen; 821 822 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 823 return; 824 825 /* 826 * Remember the previous txpending and the first transmit descriptor. 827 */ 828 opending = sc->sc_txpending; 829 firsttx = MEC_NEXTTX(sc->sc_txlast); 830 831 DPRINTF(MEC_DEBUG_START, 832 ("mec_start: opending = %d, firsttx = %d\n", opending, firsttx)); 833 834 while (sc->sc_txpending < MEC_NTXDESC - 1) { 835 /* Grab a packet off the queue. */ 836 IFQ_POLL(&ifp->if_snd, m0); 837 if (m0 == NULL) 838 break; 839 m = NULL; 840 841 /* 842 * Get the next available transmit descriptor. 843 */ 844 nexttx = MEC_NEXTTX(sc->sc_txlast); 845 txd = &sc->sc_txdesc[nexttx]; 846 txs = &sc->sc_txsoft[nexttx]; 847 848 buflen = 0; 849 bufoff = 0; 850 txdaddr = 0; /* XXX gcc */ 851 txdlen = 0; /* XXX gcc */ 852 853 len = m0->m_pkthdr.len; 854 855 DPRINTF(MEC_DEBUG_START, 856 ("mec_start: len = %d, nexttx = %d\n", len, nexttx)); 857 858 if (len < ETHER_PAD_LEN) { 859 /* 860 * I don't know if MEC chip does auto padding, 861 * so if the packet is small enough, 862 * just copy it to the buffer in txdesc. 863 * Maybe this is the simple way. 864 */ 865 DPRINTF(MEC_DEBUG_START, ("mec_start: short packet\n")); 866 867 IFQ_DEQUEUE(&ifp->if_snd, m0); 868 bufoff = MEC_TXD_BUFSTART(ETHER_PAD_LEN); 869 m_copydata(m0, 0, m0->m_pkthdr.len, 870 txd->txd_buf + bufoff); 871 memset(txd->txd_buf + bufoff + len, 0, 872 ETHER_PAD_LEN - len); 873 len = buflen = ETHER_PAD_LEN; 874 875 txs->txs_flags = MEC_TXS_TXDBUF | buflen; 876 } else { 877 /* 878 * If the packet won't fit the buffer in txdesc, 879 * we have to use concatenate pointer to handle it. 880 * While MEC can handle up to three segments to 881 * concatenate, MEC requires that both the second and 882 * third segments have to be 8 byte aligned. 883 * Since it's unlikely for mbuf clusters, we use 884 * only the first concatenate pointer. If the packet 885 * doesn't fit in one DMA segment, allocate new mbuf 886 * and copy the packet to it. 887 * 888 * Besides, if the start address of the first segments 889 * is not 8 byte aligned, such part have to be copied 890 * to the txdesc buffer. (XXX see below comments) 891 */ 892 DPRINTF(MEC_DEBUG_START, ("mec_start: long packet\n")); 893 894 dmamap = txs->txs_dmamap; 895 if (bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 896 BUS_DMA_WRITE | BUS_DMA_NOWAIT) != 0) { 897 DPRINTF(MEC_DEBUG_START, 898 ("mec_start: re-allocating mbuf\n")); 899 MGETHDR(m, M_DONTWAIT, MT_DATA); 900 if (m == NULL) { 901 printf("%s: unable to allocate " 902 "TX mbuf\n", 903 device_xname(sc->sc_dev)); 904 break; 905 } 906 if (len > (MHLEN - MEC_ETHER_ALIGN)) { 907 MCLGET(m, M_DONTWAIT); 908 if ((m->m_flags & M_EXT) == 0) { 909 printf("%s: unable to allocate " 910 "TX cluster\n", 911 device_xname(sc->sc_dev)); 912 m_freem(m); 913 break; 914 } 915 } 916 /* 917 * Each packet has the Ethernet header, so 918 * in many case the header isn't 4-byte aligned 919 * and data after the header is 4-byte aligned. 920 * Thus adding 2-byte offset before copying to 921 * new mbuf avoids unaligned copy and this may 922 * improve some performance. 923 * As noted above, unaligned part has to be 924 * copied to txdesc buffer so this may cause 925 * extra copy ops, but for now MEC always 926 * requires some data in txdesc buffer, 927 * so we always have to copy some data anyway. 928 */ 929 m->m_data += MEC_ETHER_ALIGN; 930 m_copydata(m0, 0, len, mtod(m, void *)); 931 m->m_pkthdr.len = m->m_len = len; 932 error = bus_dmamap_load_mbuf(sc->sc_dmat, 933 dmamap, m, BUS_DMA_WRITE | BUS_DMA_NOWAIT); 934 if (error) { 935 printf("%s: unable to load TX buffer, " 936 "error = %d\n", 937 device_xname(sc->sc_dev), error); 938 m_freem(m); 939 break; 940 } 941 } 942 IFQ_DEQUEUE(&ifp->if_snd, m0); 943 if (m != NULL) { 944 m_freem(m0); 945 m0 = m; 946 } 947 948 /* handle unaligned part */ 949 txdaddr = MEC_TXD_ROUNDUP(dmamap->dm_segs[0].ds_addr); 950 txs->txs_flags = MEC_TXS_TXDPTR1; 951 unaligned = 952 dmamap->dm_segs[0].ds_addr & (MEC_TXD_ALIGN - 1); 953 DPRINTF(MEC_DEBUG_START, 954 ("mec_start: ds_addr = 0x%08x, unaligned = %d\n", 955 (u_int)dmamap->dm_segs[0].ds_addr, unaligned)); 956 if (unaligned != 0) { 957 buflen = MEC_TXD_ALIGN - unaligned; 958 bufoff = MEC_TXD_BUFSTART(buflen); 959 DPRINTF(MEC_DEBUG_START, 960 ("mec_start: unaligned, " 961 "buflen = %d, bufoff = %d\n", 962 buflen, bufoff)); 963 memcpy(txd->txd_buf + bufoff, 964 mtod(m0, void *), buflen); 965 txs->txs_flags |= MEC_TXS_TXDBUF | buflen; 966 } 967 #if 1 968 else { 969 /* 970 * XXX needs hardware info XXX 971 * It seems MEC always requires some data 972 * in txd_buf[] even if buffer is 973 * 8-byte aligned otherwise DMA abort error 974 * occurs later... 975 */ 976 buflen = MEC_TXD_ALIGN; 977 bufoff = MEC_TXD_BUFSTART(buflen); 978 memcpy(txd->txd_buf + bufoff, 979 mtod(m0, void *), buflen); 980 DPRINTF(MEC_DEBUG_START, 981 ("mec_start: aligned, " 982 "buflen = %d, bufoff = %d\n", 983 buflen, bufoff)); 984 txs->txs_flags |= MEC_TXS_TXDBUF | buflen; 985 txdaddr += MEC_TXD_ALIGN; 986 } 987 #endif 988 txdlen = len - buflen; 989 DPRINTF(MEC_DEBUG_START, 990 ("mec_start: txdaddr = 0x%08llx, txdlen = %d\n", 991 txdaddr, txdlen)); 992 993 /* 994 * sync the DMA map for TX mbuf 995 * 996 * XXX unaligned part doesn't have to be sync'ed, 997 * but it's harmless... 998 */ 999 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, 1000 dmamap->dm_mapsize, BUS_DMASYNC_PREWRITE); 1001 } 1002 1003 #if NBPFILTER > 0 1004 /* 1005 * Pass packet to bpf if there is a listener. 1006 */ 1007 if (ifp->if_bpf) 1008 bpf_mtap(ifp->if_bpf, m0); 1009 #endif 1010 1011 /* 1012 * setup the transmit descriptor. 1013 */ 1014 txd->txd_cmd = (len - 1); 1015 1016 /* 1017 * Set MEC_TXCMD_TXINT every MEC_NTXDESC_INTR packets 1018 * if more than half txdescs have been queued 1019 * because TX_EMPTY interrupts will rarely happen 1020 * if TX queue is so stacked. 1021 */ 1022 if (sc->sc_txpending > (MEC_NTXDESC / 2) && 1023 (nexttx & (MEC_NTXDESC_INTR - 1)) == 0) 1024 txd->txd_cmd |= MEC_TXCMD_TXINT; 1025 1026 if (txs->txs_flags & MEC_TXS_TXDBUF) 1027 txd->txd_cmd |= TXCMD_BUFSTART(MEC_TXDESCSIZE - buflen); 1028 if (txs->txs_flags & MEC_TXS_TXDPTR1) { 1029 txd->txd_cmd |= MEC_TXCMD_PTR1; 1030 txd->txd_ptr[0] = TXPTR_LEN(txdlen - 1) | txdaddr; 1031 /* 1032 * Store a pointer to the packet so we can 1033 * free it later. 1034 */ 1035 txs->txs_mbuf = m0; 1036 } else { 1037 txd->txd_ptr[0] = 0; 1038 /* 1039 * In this case all data are copied to buffer in txdesc, 1040 * we can free TX mbuf here. 1041 */ 1042 m_freem(m0); 1043 } 1044 1045 DPRINTF(MEC_DEBUG_START, 1046 ("mec_start: txd_cmd = 0x%016llx, txd_ptr = 0x%016llx\n", 1047 txd->txd_cmd, txd->txd_ptr[0])); 1048 DPRINTF(MEC_DEBUG_START, 1049 ("mec_start: len = %d (0x%04x), buflen = %d (0x%02x)\n", 1050 len, len, buflen, buflen)); 1051 1052 /* sync TX descriptor */ 1053 MEC_TXDESCSYNC(sc, nexttx, 1054 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 1055 1056 /* start TX */ 1057 bus_space_write_8(st, sh, MEC_TX_RING_PTR, MEC_NEXTTX(nexttx)); 1058 1059 /* advance the TX pointer. */ 1060 sc->sc_txpending++; 1061 sc->sc_txlast = nexttx; 1062 } 1063 1064 if (sc->sc_txpending == MEC_NTXDESC - 1) { 1065 /* No more slots; notify upper layer. */ 1066 ifp->if_flags |= IFF_OACTIVE; 1067 } 1068 1069 if (sc->sc_txpending != opending) { 1070 /* 1071 * If the transmitter was idle, 1072 * reset the txdirty pointer and re-enable TX interrupt. 1073 */ 1074 if (opending == 0) { 1075 sc->sc_txdirty = firsttx; 1076 bus_space_write_8(st, sh, MEC_TX_ALIAS, 1077 MEC_TX_ALIAS_INT_ENABLE); 1078 } 1079 1080 /* Set a watchdog timer in case the chip flakes out. */ 1081 ifp->if_timer = 5; 1082 } 1083 } 1084 1085 static void 1086 mec_stop(struct ifnet *ifp, int disable) 1087 { 1088 struct mec_softc *sc = ifp->if_softc; 1089 struct mec_txsoft *txs; 1090 int i; 1091 1092 DPRINTF(MEC_DEBUG_STOP, ("mec_stop\n")); 1093 1094 ifp->if_timer = 0; 1095 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1096 1097 callout_stop(&sc->sc_tick_ch); 1098 mii_down(&sc->sc_mii); 1099 1100 /* release any TX buffers */ 1101 for (i = 0; i < MEC_NTXDESC; i++) { 1102 txs = &sc->sc_txsoft[i]; 1103 if ((txs->txs_flags & MEC_TXS_TXDPTR1) != 0) { 1104 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 1105 m_freem(txs->txs_mbuf); 1106 txs->txs_mbuf = NULL; 1107 } 1108 } 1109 } 1110 1111 static int 1112 mec_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1113 { 1114 int s, error; 1115 1116 s = splnet(); 1117 1118 error = ether_ioctl(ifp, cmd, data); 1119 if (error == ENETRESET) { 1120 /* 1121 * Multicast list has changed; set the hardware filter 1122 * accordingly. 1123 */ 1124 if (ifp->if_flags & IFF_RUNNING) 1125 error = mec_init(ifp); 1126 else 1127 error = 0; 1128 } 1129 1130 /* Try to get more packets going. */ 1131 mec_start(ifp); 1132 1133 splx(s); 1134 return error; 1135 } 1136 1137 static void 1138 mec_watchdog(struct ifnet *ifp) 1139 { 1140 struct mec_softc *sc = ifp->if_softc; 1141 1142 printf("%s: device timeout\n", device_xname(sc->sc_dev)); 1143 ifp->if_oerrors++; 1144 1145 mec_init(ifp); 1146 } 1147 1148 static void 1149 mec_tick(void *arg) 1150 { 1151 struct mec_softc *sc = arg; 1152 int s; 1153 1154 s = splnet(); 1155 mii_tick(&sc->sc_mii); 1156 splx(s); 1157 1158 callout_reset(&sc->sc_tick_ch, hz, mec_tick, sc); 1159 } 1160 1161 static void 1162 mec_setfilter(struct mec_softc *sc) 1163 { 1164 struct ethercom *ec = &sc->sc_ethercom; 1165 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1166 struct ether_multi *enm; 1167 struct ether_multistep step; 1168 bus_space_tag_t st = sc->sc_st; 1169 bus_space_handle_t sh = sc->sc_sh; 1170 uint64_t mchash; 1171 uint32_t control, hash; 1172 int mcnt; 1173 1174 control = bus_space_read_8(st, sh, MEC_MAC_CONTROL); 1175 control &= ~MEC_MAC_FILTER_MASK; 1176 1177 if (ifp->if_flags & IFF_PROMISC) { 1178 control |= MEC_MAC_FILTER_PROMISC; 1179 bus_space_write_8(st, sh, MEC_MULTICAST, 0xffffffffffffffffULL); 1180 bus_space_write_8(st, sh, MEC_MAC_CONTROL, control); 1181 return; 1182 } 1183 1184 mcnt = 0; 1185 mchash = 0; 1186 ETHER_FIRST_MULTI(step, ec, enm); 1187 while (enm != NULL) { 1188 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) { 1189 /* set allmulti for a range of multicast addresses */ 1190 control |= MEC_MAC_FILTER_ALLMULTI; 1191 bus_space_write_8(st, sh, MEC_MULTICAST, 1192 0xffffffffffffffffULL); 1193 bus_space_write_8(st, sh, MEC_MAC_CONTROL, control); 1194 return; 1195 } 1196 1197 #define mec_calchash(addr) (ether_crc32_be((addr), ETHER_ADDR_LEN) >> 26) 1198 1199 hash = mec_calchash(enm->enm_addrlo); 1200 mchash |= 1 << hash; 1201 mcnt++; 1202 ETHER_NEXT_MULTI(step, enm); 1203 } 1204 1205 ifp->if_flags &= ~IFF_ALLMULTI; 1206 1207 if (mcnt > 0) 1208 control |= MEC_MAC_FILTER_MATCHMULTI; 1209 1210 bus_space_write_8(st, sh, MEC_MULTICAST, mchash); 1211 bus_space_write_8(st, sh, MEC_MAC_CONTROL, control); 1212 } 1213 1214 static int 1215 mec_intr(void *arg) 1216 { 1217 struct mec_softc *sc = arg; 1218 bus_space_tag_t st = sc->sc_st; 1219 bus_space_handle_t sh = sc->sc_sh; 1220 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1221 uint32_t statreg, statack, txptr; 1222 int handled, sent; 1223 1224 DPRINTF(MEC_DEBUG_INTR, ("mec_intr: called\n")); 1225 1226 handled = sent = 0; 1227 1228 for (;;) { 1229 statreg = bus_space_read_8(st, sh, MEC_INT_STATUS); 1230 1231 DPRINTF(MEC_DEBUG_INTR, 1232 ("mec_intr: INT_STAT = 0x%08x\n", statreg)); 1233 1234 statack = statreg & MEC_INT_STATUS_MASK; 1235 if (statack == 0) 1236 break; 1237 bus_space_write_8(st, sh, MEC_INT_STATUS, statack); 1238 1239 handled = 1; 1240 1241 if (statack & 1242 (MEC_INT_RX_THRESHOLD | 1243 MEC_INT_RX_FIFO_UNDERFLOW)) { 1244 mec_rxintr(sc); 1245 } 1246 1247 if (statack & 1248 (MEC_INT_TX_EMPTY | 1249 MEC_INT_TX_PACKET_SENT | 1250 MEC_INT_TX_ABORT)) { 1251 txptr = (statreg & MEC_INT_TX_RING_BUFFER_ALIAS) 1252 >> MEC_INT_TX_RING_BUFFER_SHIFT; 1253 mec_txintr(sc, txptr); 1254 sent = 1; 1255 if ((statack & MEC_INT_TX_EMPTY) != 0) { 1256 /* 1257 * disable TX interrupt to stop 1258 * TX empty interrupt 1259 */ 1260 bus_space_write_8(st, sh, MEC_TX_ALIAS, 0); 1261 DPRINTF(MEC_DEBUG_INTR, 1262 ("mec_intr: disable TX_INT\n")); 1263 } 1264 } 1265 1266 if (statack & 1267 (MEC_INT_TX_LINK_FAIL | 1268 MEC_INT_TX_MEM_ERROR | 1269 MEC_INT_TX_ABORT | 1270 MEC_INT_RX_FIFO_UNDERFLOW | 1271 MEC_INT_RX_DMA_UNDERFLOW)) { 1272 printf("%s: mec_intr: interrupt status = 0x%08x\n", 1273 device_xname(sc->sc_dev), statreg); 1274 mec_init(ifp); 1275 break; 1276 } 1277 } 1278 1279 if (sent && !IFQ_IS_EMPTY(&ifp->if_snd)) { 1280 /* try to get more packets going */ 1281 mec_start(ifp); 1282 } 1283 1284 #if NRND > 0 1285 if (handled) 1286 rnd_add_uint32(&sc->sc_rnd_source, statreg); 1287 #endif 1288 1289 return handled; 1290 } 1291 1292 static void 1293 mec_rxintr(struct mec_softc *sc) 1294 { 1295 bus_space_tag_t st = sc->sc_st; 1296 bus_space_handle_t sh = sc->sc_sh; 1297 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1298 struct mbuf *m; 1299 struct mec_rxdesc *rxd; 1300 uint64_t rxstat; 1301 u_int len; 1302 int i; 1303 1304 DPRINTF(MEC_DEBUG_RXINTR, ("mec_rxintr: called\n")); 1305 1306 for (i = sc->sc_rxptr;; i = MEC_NEXTRX(i)) { 1307 rxd = &sc->sc_rxdesc[i]; 1308 1309 MEC_RXSTATSYNC(sc, i, BUS_DMASYNC_POSTREAD); 1310 rxstat = rxd->rxd_stat; 1311 1312 DPRINTF(MEC_DEBUG_RXINTR, 1313 ("mec_rxintr: rxstat = 0x%016llx, rxptr = %d\n", 1314 rxstat, i)); 1315 DPRINTF(MEC_DEBUG_RXINTR, ("mec_rxintr: rxfifo = 0x%08x\n", 1316 (u_int)bus_space_read_8(st, sh, MEC_RX_FIFO))); 1317 1318 if ((rxstat & MEC_RXSTAT_RECEIVED) == 0) { 1319 MEC_RXSTATSYNC(sc, i, BUS_DMASYNC_PREREAD); 1320 break; 1321 } 1322 1323 len = rxstat & MEC_RXSTAT_LEN; 1324 1325 if (len < ETHER_MIN_LEN || 1326 len > (MCLBYTES - MEC_ETHER_ALIGN)) { 1327 /* invalid length packet; drop it. */ 1328 DPRINTF(MEC_DEBUG_RXINTR, 1329 ("mec_rxintr: wrong packet\n")); 1330 dropit: 1331 ifp->if_ierrors++; 1332 rxd->rxd_stat = 0; 1333 MEC_RXSTATSYNC(sc, i, BUS_DMASYNC_PREREAD); 1334 bus_space_write_8(st, sh, MEC_MCL_RX_FIFO, 1335 MEC_CDRXADDR(sc, i)); 1336 continue; 1337 } 1338 1339 if (rxstat & 1340 (MEC_RXSTAT_BADPACKET | 1341 MEC_RXSTAT_LONGEVENT | 1342 MEC_RXSTAT_INVALID | 1343 MEC_RXSTAT_CRCERROR | 1344 MEC_RXSTAT_VIOLATION)) { 1345 printf("%s: mec_rxintr: status = 0x%016llx\n", 1346 device_xname(sc->sc_dev), rxstat); 1347 goto dropit; 1348 } 1349 1350 /* 1351 * The MEC includes the CRC with every packet. Trim 1352 * it off here. 1353 */ 1354 len -= ETHER_CRC_LEN; 1355 1356 /* 1357 * now allocate an mbuf (and possibly a cluster) to hold 1358 * the received packet. 1359 */ 1360 MGETHDR(m, M_DONTWAIT, MT_DATA); 1361 if (m == NULL) { 1362 printf("%s: unable to allocate RX mbuf\n", 1363 device_xname(sc->sc_dev)); 1364 goto dropit; 1365 } 1366 if (len > (MHLEN - MEC_ETHER_ALIGN)) { 1367 MCLGET(m, M_DONTWAIT); 1368 if ((m->m_flags & M_EXT) == 0) { 1369 printf("%s: unable to allocate RX cluster\n", 1370 device_xname(sc->sc_dev)); 1371 m_freem(m); 1372 m = NULL; 1373 goto dropit; 1374 } 1375 } 1376 1377 /* 1378 * Note MEC chip seems to insert 2 byte padding at the top of 1379 * RX buffer, but we copy whole buffer to avoid unaligned copy. 1380 */ 1381 MEC_RXBUFSYNC(sc, i, len, BUS_DMASYNC_POSTREAD); 1382 memcpy(mtod(m, void *), rxd->rxd_buf, MEC_ETHER_ALIGN + len); 1383 MEC_RXBUFSYNC(sc, i, ETHER_MAX_LEN, BUS_DMASYNC_PREREAD); 1384 m->m_data += MEC_ETHER_ALIGN; 1385 1386 /* put RX buffer into FIFO again */ 1387 rxd->rxd_stat = 0; 1388 MEC_RXSTATSYNC(sc, i, BUS_DMASYNC_PREREAD); 1389 bus_space_write_8(st, sh, MEC_MCL_RX_FIFO, MEC_CDRXADDR(sc, i)); 1390 1391 m->m_pkthdr.rcvif = ifp; 1392 m->m_pkthdr.len = m->m_len = len; 1393 1394 ifp->if_ipackets++; 1395 1396 #if NBPFILTER > 0 1397 /* 1398 * Pass this up to any BPF listeners, but only 1399 * pass it up the stack if it's for us. 1400 */ 1401 if (ifp->if_bpf) 1402 bpf_mtap(ifp->if_bpf, m); 1403 #endif 1404 1405 /* Pass it on. */ 1406 (*ifp->if_input)(ifp, m); 1407 } 1408 1409 /* update RX pointer */ 1410 sc->sc_rxptr = i; 1411 } 1412 1413 static void 1414 mec_txintr(struct mec_softc *sc, uint32_t txptr) 1415 { 1416 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1417 struct mec_txdesc *txd; 1418 struct mec_txsoft *txs; 1419 bus_dmamap_t dmamap; 1420 uint64_t txstat; 1421 int i; 1422 u_int col; 1423 1424 DPRINTF(MEC_DEBUG_TXINTR, ("mec_txintr: called\n")); 1425 1426 for (i = sc->sc_txdirty; i != txptr && sc->sc_txpending != 0; 1427 i = MEC_NEXTTX(i), sc->sc_txpending--) { 1428 txd = &sc->sc_txdesc[i]; 1429 1430 MEC_TXDESCSYNC(sc, i, 1431 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 1432 1433 txstat = txd->txd_stat; 1434 DPRINTF(MEC_DEBUG_TXINTR, 1435 ("mec_txintr: dirty = %d, txstat = 0x%016llx\n", 1436 i, txstat)); 1437 if ((txstat & MEC_TXSTAT_SENT) == 0) { 1438 MEC_TXCMDSYNC(sc, i, BUS_DMASYNC_PREREAD); 1439 break; 1440 } 1441 1442 txs = &sc->sc_txsoft[i]; 1443 if ((txs->txs_flags & MEC_TXS_TXDPTR1) != 0) { 1444 dmamap = txs->txs_dmamap; 1445 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, 1446 dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE); 1447 bus_dmamap_unload(sc->sc_dmat, dmamap); 1448 m_freem(txs->txs_mbuf); 1449 txs->txs_mbuf = NULL; 1450 } 1451 1452 col = (txstat & MEC_TXSTAT_COLCNT) >> MEC_TXSTAT_COLCNT_SHIFT; 1453 ifp->if_collisions += col; 1454 1455 if ((txstat & MEC_TXSTAT_SUCCESS) == 0) { 1456 printf("%s: TX error: txstat = 0x%016llx\n", 1457 device_xname(sc->sc_dev), txstat); 1458 ifp->if_oerrors++; 1459 } else 1460 ifp->if_opackets++; 1461 } 1462 1463 /* update the dirty TX buffer pointer */ 1464 sc->sc_txdirty = i; 1465 DPRINTF(MEC_DEBUG_INTR, 1466 ("mec_txintr: sc_txdirty = %2d, sc_txpending = %2d\n", 1467 sc->sc_txdirty, sc->sc_txpending)); 1468 1469 /* cancel the watchdog timer if there are no pending TX packets */ 1470 if (sc->sc_txpending == 0) 1471 ifp->if_timer = 0; 1472 if (sc->sc_txpending < MEC_NTXDESC - MEC_NTXDESC_RSVD) 1473 ifp->if_flags &= ~IFF_OACTIVE; 1474 } 1475 1476 static void 1477 mec_shutdown(void *arg) 1478 { 1479 struct mec_softc *sc = arg; 1480 1481 mec_stop(&sc->sc_ethercom.ec_if, 1); 1482 /* make sure to stop DMA etc. */ 1483 mec_reset(sc); 1484 } 1485
Indexes created Tue Sep 30 10:09:55 GMT 2025