1 /* $NetBSD: if_dge.c,v 1.30 2010/04/05 07:20:25 joerg Exp $ */ 2 3 /* 4 * Copyright (c) 2004, SUNET, Swedish University Computer Network. 5 * All rights reserved. 6 * 7 * Written by Anders Magnusson for SUNET, Swedish University Computer Network. 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * SUNET, Swedish University Computer Network. 21 * 4. The name of SUNET may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY SUNET ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 /* 38 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 39 * All rights reserved. 40 * 41 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed for the NetBSD Project by 54 * Wasabi Systems, Inc. 55 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 56 * or promote products derived from this software without specific prior 57 * written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 61 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 62 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 63 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 64 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 65 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 66 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 67 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 68 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 69 * POSSIBILITY OF SUCH DAMAGE. 70 */ 71 72 /* 73 * Device driver for the Intel 82597EX Ten Gigabit Ethernet controller. 74 * 75 * TODO (in no specific order): 76 * HW VLAN support. 77 * TSE offloading (needs kernel changes...) 78 * RAIDC (receive interrupt delay adaptation) 79 * Use memory > 4GB. 80 */ 81 82 #include <sys/cdefs.h> 83 __KERNEL_RCSID(0, "$NetBSD: if_dge.c,v 1.30 2010/04/05 07:20:25 joerg Exp $"); 84 85 #include "rnd.h" 86 87 #include <sys/param.h> 88 #include <sys/systm.h> 89 #include <sys/callout.h> 90 #include <sys/mbuf.h> 91 #include <sys/malloc.h> 92 #include <sys/kernel.h> 93 #include <sys/socket.h> 94 #include <sys/ioctl.h> 95 #include <sys/errno.h> 96 #include <sys/device.h> 97 #include <sys/queue.h> 98 99 #include <uvm/uvm_extern.h> /* for PAGE_SIZE */ 100 101 #if NRND > 0 102 #include <sys/rnd.h> 103 #endif 104 105 #include <net/if.h> 106 #include <net/if_dl.h> 107 #include <net/if_media.h> 108 #include <net/if_ether.h> 109 110 #include <net/bpf.h> 111 112 #include <netinet/in.h> /* XXX for struct ip */ 113 #include <netinet/in_systm.h> /* XXX for struct ip */ 114 #include <netinet/ip.h> /* XXX for struct ip */ 115 #include <netinet/tcp.h> /* XXX for struct tcphdr */ 116 117 #include <sys/bus.h> 118 #include <sys/intr.h> 119 #include <machine/endian.h> 120 121 #include <dev/mii/mii.h> 122 #include <dev/mii/miivar.h> 123 #include <dev/mii/mii_bitbang.h> 124 125 #include <dev/pci/pcireg.h> 126 #include <dev/pci/pcivar.h> 127 #include <dev/pci/pcidevs.h> 128 129 #include <dev/pci/if_dgereg.h> 130 131 /* 132 * The receive engine may sometimes become off-by-one when writing back 133 * chained descriptors. Avoid this by allocating a large chunk of 134 * memory and use if instead (to avoid chained descriptors). 135 * This only happens with chained descriptors under heavy load. 136 */ 137 #define DGE_OFFBYONE_RXBUG 138 139 #define DGE_EVENT_COUNTERS 140 #define DGE_DEBUG 141 142 #ifdef DGE_DEBUG 143 #define DGE_DEBUG_LINK 0x01 144 #define DGE_DEBUG_TX 0x02 145 #define DGE_DEBUG_RX 0x04 146 #define DGE_DEBUG_CKSUM 0x08 147 int dge_debug = 0; 148 149 #define DPRINTF(x, y) if (dge_debug & (x)) printf y 150 #else 151 #define DPRINTF(x, y) /* nothing */ 152 #endif /* DGE_DEBUG */ 153 154 /* 155 * Transmit descriptor list size. We allow up to 100 DMA segments per 156 * packet (Intel reports of jumbo frame packets with as 157 * many as 80 DMA segments when using 16k buffers). 158 */ 159 #define DGE_NTXSEGS 100 160 #define DGE_IFQUEUELEN 20000 161 #define DGE_TXQUEUELEN 2048 162 #define DGE_TXQUEUELEN_MASK (DGE_TXQUEUELEN - 1) 163 #define DGE_TXQUEUE_GC (DGE_TXQUEUELEN / 8) 164 #define DGE_NTXDESC 1024 165 #define DGE_NTXDESC_MASK (DGE_NTXDESC - 1) 166 #define DGE_NEXTTX(x) (((x) + 1) & DGE_NTXDESC_MASK) 167 #define DGE_NEXTTXS(x) (((x) + 1) & DGE_TXQUEUELEN_MASK) 168 169 /* 170 * Receive descriptor list size. 171 * Packet is of size MCLBYTES, and for jumbo packets buffers may 172 * be chained. Due to the nature of the card (high-speed), keep this 173 * ring large. With 2k buffers the ring can store 400 jumbo packets, 174 * which at full speed will be received in just under 3ms. 175 */ 176 #define DGE_NRXDESC 2048 177 #define DGE_NRXDESC_MASK (DGE_NRXDESC - 1) 178 #define DGE_NEXTRX(x) (((x) + 1) & DGE_NRXDESC_MASK) 179 /* 180 * # of descriptors between head and written descriptors. 181 * This is to work-around two erratas. 182 */ 183 #define DGE_RXSPACE 10 184 #define DGE_PREVRX(x) (((x) - DGE_RXSPACE) & DGE_NRXDESC_MASK) 185 /* 186 * Receive descriptor fetch threshholds. These are values recommended 187 * by Intel, do not touch them unless you know what you are doing. 188 */ 189 #define RXDCTL_PTHRESH_VAL 128 190 #define RXDCTL_HTHRESH_VAL 16 191 #define RXDCTL_WTHRESH_VAL 16 192 193 194 /* 195 * Tweakable parameters; default values. 196 */ 197 #define FCRTH 0x30000 /* Send XOFF water mark */ 198 #define FCRTL 0x28000 /* Send XON water mark */ 199 #define RDTR 0x20 /* Interrupt delay after receive, .8192us units */ 200 #define TIDV 0x20 /* Interrupt delay after send, .8192us units */ 201 202 /* 203 * Control structures are DMA'd to the i82597 chip. We allocate them in 204 * a single clump that maps to a single DMA segment to make serveral things 205 * easier. 206 */ 207 struct dge_control_data { 208 /* 209 * The transmit descriptors. 210 */ 211 struct dge_tdes wcd_txdescs[DGE_NTXDESC]; 212 213 /* 214 * The receive descriptors. 215 */ 216 struct dge_rdes wcd_rxdescs[DGE_NRXDESC]; 217 }; 218 219 #define DGE_CDOFF(x) offsetof(struct dge_control_data, x) 220 #define DGE_CDTXOFF(x) DGE_CDOFF(wcd_txdescs[(x)]) 221 #define DGE_CDRXOFF(x) DGE_CDOFF(wcd_rxdescs[(x)]) 222 223 /* 224 * The DGE interface have a higher max MTU size than normal jumbo frames. 225 */ 226 #define DGE_MAX_MTU 16288 /* Max MTU size for this interface */ 227 228 /* 229 * Software state for transmit jobs. 230 */ 231 struct dge_txsoft { 232 struct mbuf *txs_mbuf; /* head of our mbuf chain */ 233 bus_dmamap_t txs_dmamap; /* our DMA map */ 234 int txs_firstdesc; /* first descriptor in packet */ 235 int txs_lastdesc; /* last descriptor in packet */ 236 int txs_ndesc; /* # of descriptors used */ 237 }; 238 239 /* 240 * Software state for receive buffers. Each descriptor gets a 241 * 2k (MCLBYTES) buffer and a DMA map. For packets which fill 242 * more than one buffer, we chain them together. 243 */ 244 struct dge_rxsoft { 245 struct mbuf *rxs_mbuf; /* head of our mbuf chain */ 246 bus_dmamap_t rxs_dmamap; /* our DMA map */ 247 }; 248 249 /* 250 * Software state per device. 251 */ 252 struct dge_softc { 253 struct device sc_dev; /* generic device information */ 254 bus_space_tag_t sc_st; /* bus space tag */ 255 bus_space_handle_t sc_sh; /* bus space handle */ 256 bus_dma_tag_t sc_dmat; /* bus DMA tag */ 257 struct ethercom sc_ethercom; /* ethernet common data */ 258 259 int sc_flags; /* flags; see below */ 260 int sc_bus_speed; /* PCI/PCIX bus speed */ 261 int sc_pcix_offset; /* PCIX capability register offset */ 262 263 pci_chipset_tag_t sc_pc; 264 pcitag_t sc_pt; 265 int sc_mmrbc; /* Max PCIX memory read byte count */ 266 267 void *sc_ih; /* interrupt cookie */ 268 269 struct ifmedia sc_media; 270 271 bus_dmamap_t sc_cddmamap; /* control data DMA map */ 272 #define sc_cddma sc_cddmamap->dm_segs[0].ds_addr 273 274 int sc_align_tweak; 275 276 /* 277 * Software state for the transmit and receive descriptors. 278 */ 279 struct dge_txsoft sc_txsoft[DGE_TXQUEUELEN]; 280 struct dge_rxsoft sc_rxsoft[DGE_NRXDESC]; 281 282 /* 283 * Control data structures. 284 */ 285 struct dge_control_data *sc_control_data; 286 #define sc_txdescs sc_control_data->wcd_txdescs 287 #define sc_rxdescs sc_control_data->wcd_rxdescs 288 289 #ifdef DGE_EVENT_COUNTERS 290 /* Event counters. */ 291 struct evcnt sc_ev_txsstall; /* Tx stalled due to no txs */ 292 struct evcnt sc_ev_txdstall; /* Tx stalled due to no txd */ 293 struct evcnt sc_ev_txforceintr; /* Tx interrupts forced */ 294 struct evcnt sc_ev_txdw; /* Tx descriptor interrupts */ 295 struct evcnt sc_ev_txqe; /* Tx queue empty interrupts */ 296 struct evcnt sc_ev_rxintr; /* Rx interrupts */ 297 struct evcnt sc_ev_linkintr; /* Link interrupts */ 298 299 struct evcnt sc_ev_rxipsum; /* IP checksums checked in-bound */ 300 struct evcnt sc_ev_rxtusum; /* TCP/UDP cksums checked in-bound */ 301 struct evcnt sc_ev_txipsum; /* IP checksums comp. out-bound */ 302 struct evcnt sc_ev_txtusum; /* TCP/UDP cksums comp. out-bound */ 303 304 struct evcnt sc_ev_txctx_init; /* Tx cksum context cache initialized */ 305 struct evcnt sc_ev_txctx_hit; /* Tx cksum context cache hit */ 306 struct evcnt sc_ev_txctx_miss; /* Tx cksum context cache miss */ 307 308 struct evcnt sc_ev_txseg[DGE_NTXSEGS]; /* Tx packets w/ N segments */ 309 struct evcnt sc_ev_txdrop; /* Tx packets dropped (too many segs) */ 310 #endif /* DGE_EVENT_COUNTERS */ 311 312 int sc_txfree; /* number of free Tx descriptors */ 313 int sc_txnext; /* next ready Tx descriptor */ 314 315 int sc_txsfree; /* number of free Tx jobs */ 316 int sc_txsnext; /* next free Tx job */ 317 int sc_txsdirty; /* dirty Tx jobs */ 318 319 uint32_t sc_txctx_ipcs; /* cached Tx IP cksum ctx */ 320 uint32_t sc_txctx_tucs; /* cached Tx TCP/UDP cksum ctx */ 321 322 int sc_rxptr; /* next ready Rx descriptor/queue ent */ 323 int sc_rxdiscard; 324 int sc_rxlen; 325 struct mbuf *sc_rxhead; 326 struct mbuf *sc_rxtail; 327 struct mbuf **sc_rxtailp; 328 329 uint32_t sc_ctrl0; /* prototype CTRL0 register */ 330 uint32_t sc_icr; /* prototype interrupt bits */ 331 uint32_t sc_tctl; /* prototype TCTL register */ 332 uint32_t sc_rctl; /* prototype RCTL register */ 333 334 int sc_mchash_type; /* multicast filter offset */ 335 336 uint16_t sc_eeprom[EEPROM_SIZE]; 337 338 #if NRND > 0 339 rndsource_element_t rnd_source; /* random source */ 340 #endif 341 #ifdef DGE_OFFBYONE_RXBUG 342 void *sc_bugbuf; 343 SLIST_HEAD(, rxbugentry) sc_buglist; 344 bus_dmamap_t sc_bugmap; 345 struct rxbugentry *sc_entry; 346 #endif 347 }; 348 349 #define DGE_RXCHAIN_RESET(sc) \ 350 do { \ 351 (sc)->sc_rxtailp = &(sc)->sc_rxhead; \ 352 *(sc)->sc_rxtailp = NULL; \ 353 (sc)->sc_rxlen = 0; \ 354 } while (/*CONSTCOND*/0) 355 356 #define DGE_RXCHAIN_LINK(sc, m) \ 357 do { \ 358 *(sc)->sc_rxtailp = (sc)->sc_rxtail = (m); \ 359 (sc)->sc_rxtailp = &(m)->m_next; \ 360 } while (/*CONSTCOND*/0) 361 362 /* sc_flags */ 363 #define DGE_F_BUS64 0x20 /* bus is 64-bit */ 364 #define DGE_F_PCIX 0x40 /* bus is PCI-X */ 365 366 #ifdef DGE_EVENT_COUNTERS 367 #define DGE_EVCNT_INCR(ev) (ev)->ev_count++ 368 #else 369 #define DGE_EVCNT_INCR(ev) /* nothing */ 370 #endif 371 372 #define CSR_READ(sc, reg) \ 373 bus_space_read_4((sc)->sc_st, (sc)->sc_sh, (reg)) 374 #define CSR_WRITE(sc, reg, val) \ 375 bus_space_write_4((sc)->sc_st, (sc)->sc_sh, (reg), (val)) 376 377 #define DGE_CDTXADDR(sc, x) ((sc)->sc_cddma + DGE_CDTXOFF((x))) 378 #define DGE_CDRXADDR(sc, x) ((sc)->sc_cddma + DGE_CDRXOFF((x))) 379 380 #define DGE_CDTXSYNC(sc, x, n, ops) \ 381 do { \ 382 int __x, __n; \ 383 \ 384 __x = (x); \ 385 __n = (n); \ 386 \ 387 /* If it will wrap around, sync to the end of the ring. */ \ 388 if ((__x + __n) > DGE_NTXDESC) { \ 389 bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \ 390 DGE_CDTXOFF(__x), sizeof(struct dge_tdes) * \ 391 (DGE_NTXDESC - __x), (ops)); \ 392 __n -= (DGE_NTXDESC - __x); \ 393 __x = 0; \ 394 } \ 395 \ 396 /* Now sync whatever is left. */ \ 397 bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \ 398 DGE_CDTXOFF(__x), sizeof(struct dge_tdes) * __n, (ops)); \ 399 } while (/*CONSTCOND*/0) 400 401 #define DGE_CDRXSYNC(sc, x, ops) \ 402 do { \ 403 bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \ 404 DGE_CDRXOFF((x)), sizeof(struct dge_rdes), (ops)); \ 405 } while (/*CONSTCOND*/0) 406 407 #ifdef DGE_OFFBYONE_RXBUG 408 #define DGE_INIT_RXDESC(sc, x) \ 409 do { \ 410 struct dge_rxsoft *__rxs = &(sc)->sc_rxsoft[(x)]; \ 411 struct dge_rdes *__rxd = &(sc)->sc_rxdescs[(x)]; \ 412 struct mbuf *__m = __rxs->rxs_mbuf; \ 413 \ 414 __rxd->dr_baddrl = htole32(sc->sc_bugmap->dm_segs[0].ds_addr + \ 415 (mtod((__m), char *) - (char *)sc->sc_bugbuf)); \ 416 __rxd->dr_baddrh = 0; \ 417 __rxd->dr_len = 0; \ 418 __rxd->dr_cksum = 0; \ 419 __rxd->dr_status = 0; \ 420 __rxd->dr_errors = 0; \ 421 __rxd->dr_special = 0; \ 422 DGE_CDRXSYNC((sc), (x), BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); \ 423 \ 424 CSR_WRITE((sc), DGE_RDT, (x)); \ 425 } while (/*CONSTCOND*/0) 426 #else 427 #define DGE_INIT_RXDESC(sc, x) \ 428 do { \ 429 struct dge_rxsoft *__rxs = &(sc)->sc_rxsoft[(x)]; \ 430 struct dge_rdes *__rxd = &(sc)->sc_rxdescs[(x)]; \ 431 struct mbuf *__m = __rxs->rxs_mbuf; \ 432 \ 433 /* \ 434 * Note: We scoot the packet forward 2 bytes in the buffer \ 435 * so that the payload after the Ethernet header is aligned \ 436 * to a 4-byte boundary. \ 437 * \ 438 * XXX BRAINDAMAGE ALERT! \ 439 * The stupid chip uses the same size for every buffer, which \ 440 * is set in the Receive Control register. We are using the 2K \ 441 * size option, but what we REALLY want is (2K - 2)! For this \ 442 * reason, we can't "scoot" packets longer than the standard \ 443 * Ethernet MTU. On strict-alignment platforms, if the total \ 444 * size exceeds (2K - 2) we set align_tweak to 0 and let \ 445 * the upper layer copy the headers. \ 446 */ \ 447 __m->m_data = __m->m_ext.ext_buf + (sc)->sc_align_tweak; \ 448 \ 449 __rxd->dr_baddrl = \ 450 htole32(__rxs->rxs_dmamap->dm_segs[0].ds_addr + \ 451 (sc)->sc_align_tweak); \ 452 __rxd->dr_baddrh = 0; \ 453 __rxd->dr_len = 0; \ 454 __rxd->dr_cksum = 0; \ 455 __rxd->dr_status = 0; \ 456 __rxd->dr_errors = 0; \ 457 __rxd->dr_special = 0; \ 458 DGE_CDRXSYNC((sc), (x), BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); \ 459 \ 460 CSR_WRITE((sc), DGE_RDT, (x)); \ 461 } while (/*CONSTCOND*/0) 462 #endif 463 464 #ifdef DGE_OFFBYONE_RXBUG 465 /* 466 * Allocation constants. Much memory may be used for this. 467 */ 468 #ifndef DGE_BUFFER_SIZE 469 #define DGE_BUFFER_SIZE DGE_MAX_MTU 470 #endif 471 #define DGE_NBUFFERS (4*DGE_NRXDESC) 472 #define DGE_RXMEM (DGE_NBUFFERS*DGE_BUFFER_SIZE) 473 474 struct rxbugentry { 475 SLIST_ENTRY(rxbugentry) rb_entry; 476 int rb_slot; 477 }; 478 479 static int 480 dge_alloc_rcvmem(struct dge_softc *sc) 481 { 482 char *ptr, *kva; 483 bus_dma_segment_t seg; 484 int i, rseg, state, error; 485 struct rxbugentry *entry; 486 487 state = error = 0; 488 489 if (bus_dmamem_alloc(sc->sc_dmat, DGE_RXMEM, PAGE_SIZE, 0, 490 &seg, 1, &rseg, BUS_DMA_NOWAIT)) { 491 aprint_error_dev(&sc->sc_dev, "can't alloc rx buffers\n"); 492 return ENOBUFS; 493 } 494 495 state = 1; 496 if (bus_dmamem_map(sc->sc_dmat, &seg, rseg, DGE_RXMEM, (void **)&kva, 497 BUS_DMA_NOWAIT)) { 498 aprint_error_dev(&sc->sc_dev, "can't map DMA buffers (%d bytes)\n", 499 (int)DGE_RXMEM); 500 error = ENOBUFS; 501 goto out; 502 } 503 504 state = 2; 505 if (bus_dmamap_create(sc->sc_dmat, DGE_RXMEM, 1, DGE_RXMEM, 0, 506 BUS_DMA_NOWAIT, &sc->sc_bugmap)) { 507 aprint_error_dev(&sc->sc_dev, "can't create DMA map\n"); 508 error = ENOBUFS; 509 goto out; 510 } 511 512 state = 3; 513 if (bus_dmamap_load(sc->sc_dmat, sc->sc_bugmap, 514 kva, DGE_RXMEM, NULL, BUS_DMA_NOWAIT)) { 515 aprint_error_dev(&sc->sc_dev, "can't load DMA map\n"); 516 error = ENOBUFS; 517 goto out; 518 } 519 520 state = 4; 521 sc->sc_bugbuf = (void *)kva; 522 SLIST_INIT(&sc->sc_buglist); 523 524 /* 525 * Now divide it up into DGE_BUFFER_SIZE pieces and save the addresses 526 * in an array. 527 */ 528 ptr = sc->sc_bugbuf; 529 if ((entry = malloc(sizeof(*entry) * DGE_NBUFFERS, 530 M_DEVBUF, M_NOWAIT)) == NULL) { 531 error = ENOBUFS; 532 goto out; 533 } 534 sc->sc_entry = entry; 535 for (i = 0; i < DGE_NBUFFERS; i++) { 536 entry[i].rb_slot = i; 537 SLIST_INSERT_HEAD(&sc->sc_buglist, &entry[i], rb_entry); 538 } 539 out: 540 if (error != 0) { 541 switch (state) { 542 case 4: 543 bus_dmamap_unload(sc->sc_dmat, sc->sc_bugmap); 544 case 3: 545 bus_dmamap_destroy(sc->sc_dmat, sc->sc_bugmap); 546 case 2: 547 bus_dmamem_unmap(sc->sc_dmat, kva, DGE_RXMEM); 548 case 1: 549 bus_dmamem_free(sc->sc_dmat, &seg, rseg); 550 break; 551 default: 552 break; 553 } 554 } 555 556 return error; 557 } 558 559 /* 560 * Allocate a jumbo buffer. 561 */ 562 static void * 563 dge_getbuf(struct dge_softc *sc) 564 { 565 struct rxbugentry *entry; 566 567 entry = SLIST_FIRST(&sc->sc_buglist); 568 569 if (entry == NULL) { 570 printf("%s: no free RX buffers\n", device_xname(&sc->sc_dev)); 571 return(NULL); 572 } 573 574 SLIST_REMOVE_HEAD(&sc->sc_buglist, rb_entry); 575 return (char *)sc->sc_bugbuf + entry->rb_slot * DGE_BUFFER_SIZE; 576 } 577 578 /* 579 * Release a jumbo buffer. 580 */ 581 static void 582 dge_freebuf(struct mbuf *m, void *buf, size_t size, void *arg) 583 { 584 struct rxbugentry *entry; 585 struct dge_softc *sc; 586 int i, s; 587 588 /* Extract the softc struct pointer. */ 589 sc = (struct dge_softc *)arg; 590 591 if (sc == NULL) 592 panic("dge_freebuf: can't find softc pointer!"); 593 594 /* calculate the slot this buffer belongs to */ 595 596 i = ((char *)buf - (char *)sc->sc_bugbuf) / DGE_BUFFER_SIZE; 597 598 if ((i < 0) || (i >= DGE_NBUFFERS)) 599 panic("dge_freebuf: asked to free buffer %d!", i); 600 601 s = splvm(); 602 entry = sc->sc_entry + i; 603 SLIST_INSERT_HEAD(&sc->sc_buglist, entry, rb_entry); 604 605 if (__predict_true(m != NULL)) 606 pool_cache_put(mb_cache, m); 607 splx(s); 608 } 609 #endif 610 611 static void dge_start(struct ifnet *); 612 static void dge_watchdog(struct ifnet *); 613 static int dge_ioctl(struct ifnet *, u_long, void *); 614 static int dge_init(struct ifnet *); 615 static void dge_stop(struct ifnet *, int); 616 617 static bool dge_shutdown(device_t, int); 618 619 static void dge_reset(struct dge_softc *); 620 static void dge_rxdrain(struct dge_softc *); 621 static int dge_add_rxbuf(struct dge_softc *, int); 622 623 static void dge_set_filter(struct dge_softc *); 624 625 static int dge_intr(void *); 626 static void dge_txintr(struct dge_softc *); 627 static void dge_rxintr(struct dge_softc *); 628 static void dge_linkintr(struct dge_softc *, uint32_t); 629 630 static int dge_match(device_t, cfdata_t, void *); 631 static void dge_attach(device_t, device_t, void *); 632 633 static int dge_read_eeprom(struct dge_softc *sc); 634 static int dge_eeprom_clockin(struct dge_softc *sc); 635 static void dge_eeprom_clockout(struct dge_softc *sc, int bit); 636 static uint16_t dge_eeprom_word(struct dge_softc *sc, int addr); 637 static int dge_xgmii_mediachange(struct ifnet *); 638 static void dge_xgmii_mediastatus(struct ifnet *, struct ifmediareq *); 639 static void dge_xgmii_reset(struct dge_softc *); 640 static void dge_xgmii_writereg(device_t, int, int, int); 641 642 643 CFATTACH_DECL(dge, sizeof(struct dge_softc), 644 dge_match, dge_attach, NULL, NULL); 645 646 #ifdef DGE_EVENT_COUNTERS 647 #if DGE_NTXSEGS > 100 648 #error Update dge_txseg_evcnt_names 649 #endif 650 static char (*dge_txseg_evcnt_names)[DGE_NTXSEGS][8 /* "txseg00" + \0 */]; 651 #endif /* DGE_EVENT_COUNTERS */ 652 653 static int 654 dge_match(device_t parent, cfdata_t cf, void *aux) 655 { 656 struct pci_attach_args *pa = aux; 657 658 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_INTEL && 659 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_82597EX) 660 return (1); 661 662 return (0); 663 } 664 665 static void 666 dge_attach(device_t parent, device_t self, void *aux) 667 { 668 struct dge_softc *sc = device_private(self); 669 struct pci_attach_args *pa = aux; 670 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 671 pci_chipset_tag_t pc = pa->pa_pc; 672 pci_intr_handle_t ih; 673 const char *intrstr = NULL; 674 bus_dma_segment_t seg; 675 int i, rseg, error; 676 uint8_t enaddr[ETHER_ADDR_LEN]; 677 pcireg_t preg, memtype; 678 uint32_t reg; 679 680 sc->sc_dmat = pa->pa_dmat; 681 sc->sc_pc = pa->pa_pc; 682 sc->sc_pt = pa->pa_tag; 683 684 preg = PCI_REVISION(pci_conf_read(pc, pa->pa_tag, PCI_CLASS_REG)); 685 aprint_naive(": Ethernet controller\n"); 686 aprint_normal(": Intel i82597EX 10GbE-LR Ethernet, rev. %d\n", preg); 687 688 memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, DGE_PCI_BAR); 689 if (pci_mapreg_map(pa, DGE_PCI_BAR, memtype, 0, 690 &sc->sc_st, &sc->sc_sh, NULL, NULL)) { 691 aprint_error_dev(&sc->sc_dev, "unable to map device registers\n"); 692 return; 693 } 694 695 /* Enable bus mastering */ 696 preg = pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 697 preg |= PCI_COMMAND_MASTER_ENABLE; 698 pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, preg); 699 700 /* 701 * Map and establish our interrupt. 702 */ 703 if (pci_intr_map(pa, &ih)) { 704 aprint_error_dev(&sc->sc_dev, "unable to map interrupt\n"); 705 return; 706 } 707 intrstr = pci_intr_string(pc, ih); 708 sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, dge_intr, sc); 709 if (sc->sc_ih == NULL) { 710 aprint_error_dev(&sc->sc_dev, "unable to establish interrupt"); 711 if (intrstr != NULL) 712 aprint_error(" at %s", intrstr); 713 aprint_error("\n"); 714 return; 715 } 716 aprint_normal_dev(&sc->sc_dev, "interrupting at %s\n", intrstr); 717 718 /* 719 * Determine a few things about the bus we're connected to. 720 */ 721 reg = CSR_READ(sc, DGE_STATUS); 722 if (reg & STATUS_BUS64) 723 sc->sc_flags |= DGE_F_BUS64; 724 725 sc->sc_flags |= DGE_F_PCIX; 726 if (pci_get_capability(pa->pa_pc, pa->pa_tag, 727 PCI_CAP_PCIX, 728 &sc->sc_pcix_offset, NULL) == 0) 729 aprint_error_dev(&sc->sc_dev, "unable to find PCIX " 730 "capability\n"); 731 732 if (sc->sc_flags & DGE_F_PCIX) { 733 switch (reg & STATUS_PCIX_MSK) { 734 case STATUS_PCIX_66: 735 sc->sc_bus_speed = 66; 736 break; 737 case STATUS_PCIX_100: 738 sc->sc_bus_speed = 100; 739 break; 740 case STATUS_PCIX_133: 741 sc->sc_bus_speed = 133; 742 break; 743 default: 744 aprint_error_dev(&sc->sc_dev, 745 "unknown PCIXSPD %d; assuming 66MHz\n", 746 reg & STATUS_PCIX_MSK); 747 sc->sc_bus_speed = 66; 748 } 749 } else 750 sc->sc_bus_speed = (reg & STATUS_BUS64) ? 66 : 33; 751 aprint_verbose_dev(&sc->sc_dev, "%d-bit %dMHz %s bus\n", 752 (sc->sc_flags & DGE_F_BUS64) ? 64 : 32, sc->sc_bus_speed, 753 (sc->sc_flags & DGE_F_PCIX) ? "PCIX" : "PCI"); 754 755 /* 756 * Allocate the control data structures, and create and load the 757 * DMA map for it. 758 */ 759 if ((error = bus_dmamem_alloc(sc->sc_dmat, 760 sizeof(struct dge_control_data), PAGE_SIZE, 0, &seg, 1, &rseg, 761 0)) != 0) { 762 aprint_error_dev(&sc->sc_dev, 763 "unable to allocate control data, error = %d\n", 764 error); 765 goto fail_0; 766 } 767 768 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 769 sizeof(struct dge_control_data), (void **)&sc->sc_control_data, 770 0)) != 0) { 771 aprint_error_dev(&sc->sc_dev, "unable to map control data, error = %d\n", 772 error); 773 goto fail_1; 774 } 775 776 if ((error = bus_dmamap_create(sc->sc_dmat, 777 sizeof(struct dge_control_data), 1, 778 sizeof(struct dge_control_data), 0, 0, &sc->sc_cddmamap)) != 0) { 779 aprint_error_dev(&sc->sc_dev, "unable to create control data DMA map, " 780 "error = %d\n", error); 781 goto fail_2; 782 } 783 784 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 785 sc->sc_control_data, sizeof(struct dge_control_data), NULL, 786 0)) != 0) { 787 aprint_error_dev(&sc->sc_dev, 788 "unable to load control data DMA map, error = %d\n", 789 error); 790 goto fail_3; 791 } 792 793 #ifdef DGE_OFFBYONE_RXBUG 794 if (dge_alloc_rcvmem(sc) != 0) 795 return; /* Already complained */ 796 #endif 797 /* 798 * Create the transmit buffer DMA maps. 799 */ 800 for (i = 0; i < DGE_TXQUEUELEN; i++) { 801 if ((error = bus_dmamap_create(sc->sc_dmat, DGE_MAX_MTU, 802 DGE_NTXSEGS, MCLBYTES, 0, 0, 803 &sc->sc_txsoft[i].txs_dmamap)) != 0) { 804 aprint_error_dev(&sc->sc_dev, "unable to create Tx DMA map %d, " 805 "error = %d\n", i, error); 806 goto fail_4; 807 } 808 } 809 810 /* 811 * Create the receive buffer DMA maps. 812 */ 813 for (i = 0; i < DGE_NRXDESC; i++) { 814 #ifdef DGE_OFFBYONE_RXBUG 815 if ((error = bus_dmamap_create(sc->sc_dmat, DGE_BUFFER_SIZE, 1, 816 DGE_BUFFER_SIZE, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 817 #else 818 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 819 MCLBYTES, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 820 #endif 821 aprint_error_dev(&sc->sc_dev, "unable to create Rx DMA map %d, " 822 "error = %d\n", i, error); 823 goto fail_5; 824 } 825 sc->sc_rxsoft[i].rxs_mbuf = NULL; 826 } 827 828 /* 829 * Set bits in ctrl0 register. 830 * Should get the software defined pins out of EEPROM? 831 */ 832 sc->sc_ctrl0 |= CTRL0_RPE | CTRL0_TPE; /* XON/XOFF */ 833 sc->sc_ctrl0 |= CTRL0_SDP3_DIR | CTRL0_SDP2_DIR | CTRL0_SDP1_DIR | 834 CTRL0_SDP0_DIR | CTRL0_SDP3 | CTRL0_SDP2 | CTRL0_SDP0; 835 836 /* 837 * Reset the chip to a known state. 838 */ 839 dge_reset(sc); 840 841 /* 842 * Reset the PHY. 843 */ 844 dge_xgmii_reset(sc); 845 846 /* 847 * Read in EEPROM data. 848 */ 849 if (dge_read_eeprom(sc)) { 850 aprint_error_dev(&sc->sc_dev, "couldn't read EEPROM\n"); 851 return; 852 } 853 854 /* 855 * Get the ethernet address. 856 */ 857 enaddr[0] = sc->sc_eeprom[EE_ADDR01] & 0377; 858 enaddr[1] = sc->sc_eeprom[EE_ADDR01] >> 8; 859 enaddr[2] = sc->sc_eeprom[EE_ADDR23] & 0377; 860 enaddr[3] = sc->sc_eeprom[EE_ADDR23] >> 8; 861 enaddr[4] = sc->sc_eeprom[EE_ADDR45] & 0377; 862 enaddr[5] = sc->sc_eeprom[EE_ADDR45] >> 8; 863 864 aprint_normal_dev(&sc->sc_dev, "Ethernet address %s\n", 865 ether_sprintf(enaddr)); 866 867 /* 868 * Setup media stuff. 869 */ 870 ifmedia_init(&sc->sc_media, IFM_IMASK, dge_xgmii_mediachange, 871 dge_xgmii_mediastatus); 872 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_10G_LR, 0, NULL); 873 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_10G_LR); 874 875 ifp = &sc->sc_ethercom.ec_if; 876 strlcpy(ifp->if_xname, device_xname(&sc->sc_dev), IFNAMSIZ); 877 ifp->if_softc = sc; 878 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 879 ifp->if_ioctl = dge_ioctl; 880 ifp->if_start = dge_start; 881 ifp->if_watchdog = dge_watchdog; 882 ifp->if_init = dge_init; 883 ifp->if_stop = dge_stop; 884 IFQ_SET_MAXLEN(&ifp->if_snd, max(DGE_IFQUEUELEN, IFQ_MAXLEN)); 885 IFQ_SET_READY(&ifp->if_snd); 886 887 sc->sc_ethercom.ec_capabilities |= 888 ETHERCAP_JUMBO_MTU | ETHERCAP_VLAN_MTU; 889 890 /* 891 * We can perform TCPv4 and UDPv4 checkums in-bound. 892 */ 893 ifp->if_capabilities |= 894 IFCAP_CSUM_IPv4_Tx | IFCAP_CSUM_IPv4_Rx | 895 IFCAP_CSUM_TCPv4_Tx | IFCAP_CSUM_TCPv4_Rx | 896 IFCAP_CSUM_UDPv4_Tx | IFCAP_CSUM_UDPv4_Rx; 897 898 /* 899 * Attach the interface. 900 */ 901 if_attach(ifp); 902 ether_ifattach(ifp, enaddr); 903 #if NRND > 0 904 rnd_attach_source(&sc->rnd_source, device_xname(&sc->sc_dev), 905 RND_TYPE_NET, 0); 906 #endif 907 908 #ifdef DGE_EVENT_COUNTERS 909 /* Fix segment event naming */ 910 if (dge_txseg_evcnt_names == NULL) { 911 dge_txseg_evcnt_names = 912 malloc(sizeof(*dge_txseg_evcnt_names), M_DEVBUF, M_WAITOK); 913 for (i = 0; i < DGE_NTXSEGS; i++) 914 snprintf((*dge_txseg_evcnt_names)[i], 915 sizeof((*dge_txseg_evcnt_names)[i]), "txseg%d", i); 916 } 917 918 /* Attach event counters. */ 919 evcnt_attach_dynamic(&sc->sc_ev_txsstall, EVCNT_TYPE_MISC, 920 NULL, device_xname(&sc->sc_dev), "txsstall"); 921 evcnt_attach_dynamic(&sc->sc_ev_txdstall, EVCNT_TYPE_MISC, 922 NULL, device_xname(&sc->sc_dev), "txdstall"); 923 evcnt_attach_dynamic(&sc->sc_ev_txforceintr, EVCNT_TYPE_MISC, 924 NULL, device_xname(&sc->sc_dev), "txforceintr"); 925 evcnt_attach_dynamic(&sc->sc_ev_txdw, EVCNT_TYPE_INTR, 926 NULL, device_xname(&sc->sc_dev), "txdw"); 927 evcnt_attach_dynamic(&sc->sc_ev_txqe, EVCNT_TYPE_INTR, 928 NULL, device_xname(&sc->sc_dev), "txqe"); 929 evcnt_attach_dynamic(&sc->sc_ev_rxintr, EVCNT_TYPE_INTR, 930 NULL, device_xname(&sc->sc_dev), "rxintr"); 931 evcnt_attach_dynamic(&sc->sc_ev_linkintr, EVCNT_TYPE_INTR, 932 NULL, device_xname(&sc->sc_dev), "linkintr"); 933 934 evcnt_attach_dynamic(&sc->sc_ev_rxipsum, EVCNT_TYPE_MISC, 935 NULL, device_xname(&sc->sc_dev), "rxipsum"); 936 evcnt_attach_dynamic(&sc->sc_ev_rxtusum, EVCNT_TYPE_MISC, 937 NULL, device_xname(&sc->sc_dev), "rxtusum"); 938 evcnt_attach_dynamic(&sc->sc_ev_txipsum, EVCNT_TYPE_MISC, 939 NULL, device_xname(&sc->sc_dev), "txipsum"); 940 evcnt_attach_dynamic(&sc->sc_ev_txtusum, EVCNT_TYPE_MISC, 941 NULL, device_xname(&sc->sc_dev), "txtusum"); 942 943 evcnt_attach_dynamic(&sc->sc_ev_txctx_init, EVCNT_TYPE_MISC, 944 NULL, device_xname(&sc->sc_dev), "txctx init"); 945 evcnt_attach_dynamic(&sc->sc_ev_txctx_hit, EVCNT_TYPE_MISC, 946 NULL, device_xname(&sc->sc_dev), "txctx hit"); 947 evcnt_attach_dynamic(&sc->sc_ev_txctx_miss, EVCNT_TYPE_MISC, 948 NULL, device_xname(&sc->sc_dev), "txctx miss"); 949 950 for (i = 0; i < DGE_NTXSEGS; i++) 951 evcnt_attach_dynamic(&sc->sc_ev_txseg[i], EVCNT_TYPE_MISC, 952 NULL, device_xname(&sc->sc_dev), (*dge_txseg_evcnt_names)[i]); 953 954 evcnt_attach_dynamic(&sc->sc_ev_txdrop, EVCNT_TYPE_MISC, 955 NULL, device_xname(&sc->sc_dev), "txdrop"); 956 957 #endif /* DGE_EVENT_COUNTERS */ 958 959 /* 960 * Make sure the interface is shutdown during reboot. 961 */ 962 if (pmf_device_register1(self, NULL, NULL, dge_shutdown)) 963 pmf_class_network_register(self, ifp); 964 else 965 aprint_error_dev(self, "couldn't establish power handler\n"); 966 967 return; 968 969 /* 970 * Free any resources we've allocated during the failed attach 971 * attempt. Do this in reverse order and fall through. 972 */ 973 fail_5: 974 for (i = 0; i < DGE_NRXDESC; i++) { 975 if (sc->sc_rxsoft[i].rxs_dmamap != NULL) 976 bus_dmamap_destroy(sc->sc_dmat, 977 sc->sc_rxsoft[i].rxs_dmamap); 978 } 979 fail_4: 980 for (i = 0; i < DGE_TXQUEUELEN; i++) { 981 if (sc->sc_txsoft[i].txs_dmamap != NULL) 982 bus_dmamap_destroy(sc->sc_dmat, 983 sc->sc_txsoft[i].txs_dmamap); 984 } 985 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 986 fail_3: 987 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 988 fail_2: 989 bus_dmamem_unmap(sc->sc_dmat, (void *)sc->sc_control_data, 990 sizeof(struct dge_control_data)); 991 fail_1: 992 bus_dmamem_free(sc->sc_dmat, &seg, rseg); 993 fail_0: 994 return; 995 } 996 997 /* 998 * dge_shutdown: 999 * 1000 * Make sure the interface is stopped at reboot time. 1001 */ 1002 static bool 1003 dge_shutdown(device_t self, int howto) 1004 { 1005 struct dge_softc *sc; 1006 1007 sc = device_private(self); 1008 dge_stop(&sc->sc_ethercom.ec_if, 1); 1009 1010 return true; 1011 } 1012 1013 /* 1014 * dge_tx_cksum: 1015 * 1016 * Set up TCP/IP checksumming parameters for the 1017 * specified packet. 1018 */ 1019 static int 1020 dge_tx_cksum(struct dge_softc *sc, struct dge_txsoft *txs, uint8_t *fieldsp) 1021 { 1022 struct mbuf *m0 = txs->txs_mbuf; 1023 struct dge_ctdes *t; 1024 uint32_t ipcs, tucs; 1025 struct ether_header *eh; 1026 int offset, iphl; 1027 uint8_t fields = 0; 1028 1029 /* 1030 * XXX It would be nice if the mbuf pkthdr had offset 1031 * fields for the protocol headers. 1032 */ 1033 1034 eh = mtod(m0, struct ether_header *); 1035 switch (htons(eh->ether_type)) { 1036 case ETHERTYPE_IP: 1037 offset = ETHER_HDR_LEN; 1038 break; 1039 1040 case ETHERTYPE_VLAN: 1041 offset = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN; 1042 break; 1043 1044 default: 1045 /* 1046 * Don't support this protocol or encapsulation. 1047 */ 1048 *fieldsp = 0; 1049 return (0); 1050 } 1051 1052 iphl = M_CSUM_DATA_IPv4_IPHL(m0->m_pkthdr.csum_data); 1053 1054 /* 1055 * NOTE: Even if we're not using the IP or TCP/UDP checksum 1056 * offload feature, if we load the context descriptor, we 1057 * MUST provide valid values for IPCSS and TUCSS fields. 1058 */ 1059 1060 if (m0->m_pkthdr.csum_flags & M_CSUM_IPv4) { 1061 DGE_EVCNT_INCR(&sc->sc_ev_txipsum); 1062 fields |= TDESC_POPTS_IXSM; 1063 ipcs = DGE_TCPIP_IPCSS(offset) | 1064 DGE_TCPIP_IPCSO(offset + offsetof(struct ip, ip_sum)) | 1065 DGE_TCPIP_IPCSE(offset + iphl - 1); 1066 } else if (__predict_true(sc->sc_txctx_ipcs != 0xffffffff)) { 1067 /* Use the cached value. */ 1068 ipcs = sc->sc_txctx_ipcs; 1069 } else { 1070 /* Just initialize it to the likely value anyway. */ 1071 ipcs = DGE_TCPIP_IPCSS(offset) | 1072 DGE_TCPIP_IPCSO(offset + offsetof(struct ip, ip_sum)) | 1073 DGE_TCPIP_IPCSE(offset + iphl - 1); 1074 } 1075 DPRINTF(DGE_DEBUG_CKSUM, 1076 ("%s: CKSUM: offset %d ipcs 0x%x\n", 1077 device_xname(&sc->sc_dev), offset, ipcs)); 1078 1079 offset += iphl; 1080 1081 if (m0->m_pkthdr.csum_flags & (M_CSUM_TCPv4|M_CSUM_UDPv4)) { 1082 DGE_EVCNT_INCR(&sc->sc_ev_txtusum); 1083 fields |= TDESC_POPTS_TXSM; 1084 tucs = DGE_TCPIP_TUCSS(offset) | 1085 DGE_TCPIP_TUCSO(offset + M_CSUM_DATA_IPv4_OFFSET(m0->m_pkthdr.csum_data)) | 1086 DGE_TCPIP_TUCSE(0) /* rest of packet */; 1087 } else if (__predict_true(sc->sc_txctx_tucs != 0xffffffff)) { 1088 /* Use the cached value. */ 1089 tucs = sc->sc_txctx_tucs; 1090 } else { 1091 /* Just initialize it to a valid TCP context. */ 1092 tucs = DGE_TCPIP_TUCSS(offset) | 1093 DGE_TCPIP_TUCSO(offset + offsetof(struct tcphdr, th_sum)) | 1094 DGE_TCPIP_TUCSE(0) /* rest of packet */; 1095 } 1096 1097 DPRINTF(DGE_DEBUG_CKSUM, 1098 ("%s: CKSUM: offset %d tucs 0x%x\n", 1099 device_xname(&sc->sc_dev), offset, tucs)); 1100 1101 if (sc->sc_txctx_ipcs == ipcs && 1102 sc->sc_txctx_tucs == tucs) { 1103 /* Cached context is fine. */ 1104 DGE_EVCNT_INCR(&sc->sc_ev_txctx_hit); 1105 } else { 1106 /* Fill in the context descriptor. */ 1107 #ifdef DGE_EVENT_COUNTERS 1108 if (sc->sc_txctx_ipcs == 0xffffffff && 1109 sc->sc_txctx_tucs == 0xffffffff) 1110 DGE_EVCNT_INCR(&sc->sc_ev_txctx_init); 1111 else 1112 DGE_EVCNT_INCR(&sc->sc_ev_txctx_miss); 1113 #endif 1114 t = (struct dge_ctdes *)&sc->sc_txdescs[sc->sc_txnext]; 1115 t->dc_tcpip_ipcs = htole32(ipcs); 1116 t->dc_tcpip_tucs = htole32(tucs); 1117 t->dc_tcpip_cmdlen = htole32(TDESC_DTYP_CTD); 1118 t->dc_tcpip_seg = 0; 1119 DGE_CDTXSYNC(sc, sc->sc_txnext, 1, BUS_DMASYNC_PREWRITE); 1120 1121 sc->sc_txctx_ipcs = ipcs; 1122 sc->sc_txctx_tucs = tucs; 1123 1124 sc->sc_txnext = DGE_NEXTTX(sc->sc_txnext); 1125 txs->txs_ndesc++; 1126 } 1127 1128 *fieldsp = fields; 1129 1130 return (0); 1131 } 1132 1133 /* 1134 * dge_start: [ifnet interface function] 1135 * 1136 * Start packet transmission on the interface. 1137 */ 1138 static void 1139 dge_start(struct ifnet *ifp) 1140 { 1141 struct dge_softc *sc = ifp->if_softc; 1142 struct mbuf *m0; 1143 struct dge_txsoft *txs; 1144 bus_dmamap_t dmamap; 1145 int error, nexttx, lasttx = -1, ofree, seg; 1146 uint32_t cksumcmd; 1147 uint8_t cksumfields; 1148 1149 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 1150 return; 1151 1152 /* 1153 * Remember the previous number of free descriptors. 1154 */ 1155 ofree = sc->sc_txfree; 1156 1157 /* 1158 * Loop through the send queue, setting up transmit descriptors 1159 * until we drain the queue, or use up all available transmit 1160 * descriptors. 1161 */ 1162 for (;;) { 1163 /* Grab a packet off the queue. */ 1164 IFQ_POLL(&ifp->if_snd, m0); 1165 if (m0 == NULL) 1166 break; 1167 1168 DPRINTF(DGE_DEBUG_TX, 1169 ("%s: TX: have packet to transmit: %p\n", 1170 device_xname(&sc->sc_dev), m0)); 1171 1172 /* Get a work queue entry. */ 1173 if (sc->sc_txsfree < DGE_TXQUEUE_GC) { 1174 dge_txintr(sc); 1175 if (sc->sc_txsfree == 0) { 1176 DPRINTF(DGE_DEBUG_TX, 1177 ("%s: TX: no free job descriptors\n", 1178 device_xname(&sc->sc_dev))); 1179 DGE_EVCNT_INCR(&sc->sc_ev_txsstall); 1180 break; 1181 } 1182 } 1183 1184 txs = &sc->sc_txsoft[sc->sc_txsnext]; 1185 dmamap = txs->txs_dmamap; 1186 1187 /* 1188 * Load the DMA map. If this fails, the packet either 1189 * didn't fit in the allotted number of segments, or we 1190 * were short on resources. For the too-many-segments 1191 * case, we simply report an error and drop the packet, 1192 * since we can't sanely copy a jumbo packet to a single 1193 * buffer. 1194 */ 1195 error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 1196 BUS_DMA_WRITE|BUS_DMA_NOWAIT); 1197 if (error) { 1198 if (error == EFBIG) { 1199 DGE_EVCNT_INCR(&sc->sc_ev_txdrop); 1200 printf("%s: Tx packet consumes too many " 1201 "DMA segments, dropping...\n", 1202 device_xname(&sc->sc_dev)); 1203 IFQ_DEQUEUE(&ifp->if_snd, m0); 1204 m_freem(m0); 1205 continue; 1206 } 1207 /* 1208 * Short on resources, just stop for now. 1209 */ 1210 DPRINTF(DGE_DEBUG_TX, 1211 ("%s: TX: dmamap load failed: %d\n", 1212 device_xname(&sc->sc_dev), error)); 1213 break; 1214 } 1215 1216 /* 1217 * Ensure we have enough descriptors free to describe 1218 * the packet. Note, we always reserve one descriptor 1219 * at the end of the ring due to the semantics of the 1220 * TDT register, plus one more in the event we need 1221 * to re-load checksum offload context. 1222 */ 1223 if (dmamap->dm_nsegs > (sc->sc_txfree - 2)) { 1224 /* 1225 * Not enough free descriptors to transmit this 1226 * packet. We haven't committed anything yet, 1227 * so just unload the DMA map, put the packet 1228 * pack on the queue, and punt. Notify the upper 1229 * layer that there are no more slots left. 1230 */ 1231 DPRINTF(DGE_DEBUG_TX, 1232 ("%s: TX: need %d descriptors, have %d\n", 1233 device_xname(&sc->sc_dev), dmamap->dm_nsegs, 1234 sc->sc_txfree - 1)); 1235 ifp->if_flags |= IFF_OACTIVE; 1236 bus_dmamap_unload(sc->sc_dmat, dmamap); 1237 DGE_EVCNT_INCR(&sc->sc_ev_txdstall); 1238 break; 1239 } 1240 1241 IFQ_DEQUEUE(&ifp->if_snd, m0); 1242 1243 /* 1244 * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET. 1245 */ 1246 1247 /* Sync the DMA map. */ 1248 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize, 1249 BUS_DMASYNC_PREWRITE); 1250 1251 DPRINTF(DGE_DEBUG_TX, 1252 ("%s: TX: packet has %d DMA segments\n", 1253 device_xname(&sc->sc_dev), dmamap->dm_nsegs)); 1254 1255 DGE_EVCNT_INCR(&sc->sc_ev_txseg[dmamap->dm_nsegs - 1]); 1256 1257 /* 1258 * Store a pointer to the packet so that we can free it 1259 * later. 1260 * 1261 * Initially, we consider the number of descriptors the 1262 * packet uses the number of DMA segments. This may be 1263 * incremented by 1 if we do checksum offload (a descriptor 1264 * is used to set the checksum context). 1265 */ 1266 txs->txs_mbuf = m0; 1267 txs->txs_firstdesc = sc->sc_txnext; 1268 txs->txs_ndesc = dmamap->dm_nsegs; 1269 1270 /* 1271 * Set up checksum offload parameters for 1272 * this packet. 1273 */ 1274 if (m0->m_pkthdr.csum_flags & 1275 (M_CSUM_IPv4|M_CSUM_TCPv4|M_CSUM_UDPv4)) { 1276 if (dge_tx_cksum(sc, txs, &cksumfields) != 0) { 1277 /* Error message already displayed. */ 1278 bus_dmamap_unload(sc->sc_dmat, dmamap); 1279 continue; 1280 } 1281 } else { 1282 cksumfields = 0; 1283 } 1284 1285 cksumcmd = TDESC_DCMD_IDE | TDESC_DTYP_DATA; 1286 1287 /* 1288 * Initialize the transmit descriptor. 1289 */ 1290 for (nexttx = sc->sc_txnext, seg = 0; 1291 seg < dmamap->dm_nsegs; 1292 seg++, nexttx = DGE_NEXTTX(nexttx)) { 1293 /* 1294 * Note: we currently only use 32-bit DMA 1295 * addresses. 1296 */ 1297 sc->sc_txdescs[nexttx].dt_baddrh = 0; 1298 sc->sc_txdescs[nexttx].dt_baddrl = 1299 htole32(dmamap->dm_segs[seg].ds_addr); 1300 sc->sc_txdescs[nexttx].dt_ctl = 1301 htole32(cksumcmd | dmamap->dm_segs[seg].ds_len); 1302 sc->sc_txdescs[nexttx].dt_status = 0; 1303 sc->sc_txdescs[nexttx].dt_popts = cksumfields; 1304 sc->sc_txdescs[nexttx].dt_vlan = 0; 1305 lasttx = nexttx; 1306 1307 DPRINTF(DGE_DEBUG_TX, 1308 ("%s: TX: desc %d: low 0x%08lx, len 0x%04lx\n", 1309 device_xname(&sc->sc_dev), nexttx, 1310 (unsigned long)le32toh(dmamap->dm_segs[seg].ds_addr), 1311 (unsigned long)le32toh(dmamap->dm_segs[seg].ds_len))); 1312 } 1313 1314 KASSERT(lasttx != -1); 1315 1316 /* 1317 * Set up the command byte on the last descriptor of 1318 * the packet. If we're in the interrupt delay window, 1319 * delay the interrupt. 1320 */ 1321 sc->sc_txdescs[lasttx].dt_ctl |= 1322 htole32(TDESC_DCMD_EOP | TDESC_DCMD_RS); 1323 1324 txs->txs_lastdesc = lasttx; 1325 1326 DPRINTF(DGE_DEBUG_TX, 1327 ("%s: TX: desc %d: cmdlen 0x%08x\n", device_xname(&sc->sc_dev), 1328 lasttx, le32toh(sc->sc_txdescs[lasttx].dt_ctl))); 1329 1330 /* Sync the descriptors we're using. */ 1331 DGE_CDTXSYNC(sc, sc->sc_txnext, dmamap->dm_nsegs, 1332 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 1333 1334 /* Give the packet to the chip. */ 1335 CSR_WRITE(sc, DGE_TDT, nexttx); 1336 1337 DPRINTF(DGE_DEBUG_TX, 1338 ("%s: TX: TDT -> %d\n", device_xname(&sc->sc_dev), nexttx)); 1339 1340 DPRINTF(DGE_DEBUG_TX, 1341 ("%s: TX: finished transmitting packet, job %d\n", 1342 device_xname(&sc->sc_dev), sc->sc_txsnext)); 1343 1344 /* Advance the tx pointer. */ 1345 sc->sc_txfree -= txs->txs_ndesc; 1346 sc->sc_txnext = nexttx; 1347 1348 sc->sc_txsfree--; 1349 sc->sc_txsnext = DGE_NEXTTXS(sc->sc_txsnext); 1350 1351 /* Pass the packet to any BPF listeners. */ 1352 bpf_mtap(ifp, m0); 1353 } 1354 1355 if (sc->sc_txsfree == 0 || sc->sc_txfree <= 2) { 1356 /* No more slots; notify upper layer. */ 1357 ifp->if_flags |= IFF_OACTIVE; 1358 } 1359 1360 if (sc->sc_txfree != ofree) { 1361 /* Set a watchdog timer in case the chip flakes out. */ 1362 ifp->if_timer = 5; 1363 } 1364 } 1365 1366 /* 1367 * dge_watchdog: [ifnet interface function] 1368 * 1369 * Watchdog timer handler. 1370 */ 1371 static void 1372 dge_watchdog(struct ifnet *ifp) 1373 { 1374 struct dge_softc *sc = ifp->if_softc; 1375 1376 /* 1377 * Since we're using delayed interrupts, sweep up 1378 * before we report an error. 1379 */ 1380 dge_txintr(sc); 1381 1382 if (sc->sc_txfree != DGE_NTXDESC) { 1383 printf("%s: device timeout (txfree %d txsfree %d txnext %d)\n", 1384 device_xname(&sc->sc_dev), sc->sc_txfree, sc->sc_txsfree, 1385 sc->sc_txnext); 1386 ifp->if_oerrors++; 1387 1388 /* Reset the interface. */ 1389 (void) dge_init(ifp); 1390 } 1391 1392 /* Try to get more packets going. */ 1393 dge_start(ifp); 1394 } 1395 1396 /* 1397 * dge_ioctl: [ifnet interface function] 1398 * 1399 * Handle control requests from the operator. 1400 */ 1401 static int 1402 dge_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1403 { 1404 struct dge_softc *sc = ifp->if_softc; 1405 struct ifreq *ifr = (struct ifreq *) data; 1406 pcireg_t preg; 1407 int s, error, mmrbc; 1408 1409 s = splnet(); 1410 1411 switch (cmd) { 1412 case SIOCSIFMEDIA: 1413 case SIOCGIFMEDIA: 1414 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1415 break; 1416 1417 case SIOCSIFMTU: 1418 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > DGE_MAX_MTU) 1419 error = EINVAL; 1420 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1421 break; 1422 else if (ifp->if_flags & IFF_UP) 1423 error = (*ifp->if_init)(ifp); 1424 else 1425 error = 0; 1426 break; 1427 1428 case SIOCSIFFLAGS: 1429 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1430 break; 1431 /* extract link flags */ 1432 if ((ifp->if_flags & IFF_LINK0) == 0 && 1433 (ifp->if_flags & IFF_LINK1) == 0) 1434 mmrbc = PCIX_MMRBC_512; 1435 else if ((ifp->if_flags & IFF_LINK0) == 0 && 1436 (ifp->if_flags & IFF_LINK1) != 0) 1437 mmrbc = PCIX_MMRBC_1024; 1438 else if ((ifp->if_flags & IFF_LINK0) != 0 && 1439 (ifp->if_flags & IFF_LINK1) == 0) 1440 mmrbc = PCIX_MMRBC_2048; 1441 else 1442 mmrbc = PCIX_MMRBC_4096; 1443 if (mmrbc != sc->sc_mmrbc) { 1444 preg = pci_conf_read(sc->sc_pc, sc->sc_pt,DGE_PCIX_CMD); 1445 preg &= ~PCIX_MMRBC_MSK; 1446 preg |= mmrbc; 1447 pci_conf_write(sc->sc_pc, sc->sc_pt,DGE_PCIX_CMD, preg); 1448 sc->sc_mmrbc = mmrbc; 1449 } 1450 /* FALLTHROUGH */ 1451 default: 1452 if ((error = ether_ioctl(ifp, cmd, data)) != ENETRESET) 1453 break; 1454 1455 error = 0; 1456 1457 if (cmd == SIOCSIFCAP) 1458 error = (*ifp->if_init)(ifp); 1459 else if (cmd != SIOCADDMULTI && cmd != SIOCDELMULTI) 1460 ; 1461 else if (ifp->if_flags & IFF_RUNNING) { 1462 /* 1463 * Multicast list has changed; set the hardware filter 1464 * accordingly. 1465 */ 1466 dge_set_filter(sc); 1467 } 1468 break; 1469 } 1470 1471 /* Try to get more packets going. */ 1472 dge_start(ifp); 1473 1474 splx(s); 1475 return (error); 1476 } 1477 1478 /* 1479 * dge_intr: 1480 * 1481 * Interrupt service routine. 1482 */ 1483 static int 1484 dge_intr(void *arg) 1485 { 1486 struct dge_softc *sc = arg; 1487 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1488 uint32_t icr; 1489 int wantinit, handled = 0; 1490 1491 for (wantinit = 0; wantinit == 0;) { 1492 icr = CSR_READ(sc, DGE_ICR); 1493 if ((icr & sc->sc_icr) == 0) 1494 break; 1495 1496 #if 0 /*NRND > 0*/ 1497 if (RND_ENABLED(&sc->rnd_source)) 1498 rnd_add_uint32(&sc->rnd_source, icr); 1499 #endif 1500 1501 handled = 1; 1502 1503 #if defined(DGE_DEBUG) || defined(DGE_EVENT_COUNTERS) 1504 if (icr & (ICR_RXDMT0|ICR_RXT0)) { 1505 DPRINTF(DGE_DEBUG_RX, 1506 ("%s: RX: got Rx intr 0x%08x\n", 1507 device_xname(&sc->sc_dev), 1508 icr & (ICR_RXDMT0|ICR_RXT0))); 1509 DGE_EVCNT_INCR(&sc->sc_ev_rxintr); 1510 } 1511 #endif 1512 dge_rxintr(sc); 1513 1514 #if defined(DGE_DEBUG) || defined(DGE_EVENT_COUNTERS) 1515 if (icr & ICR_TXDW) { 1516 DPRINTF(DGE_DEBUG_TX, 1517 ("%s: TX: got TXDW interrupt\n", 1518 device_xname(&sc->sc_dev))); 1519 DGE_EVCNT_INCR(&sc->sc_ev_txdw); 1520 } 1521 if (icr & ICR_TXQE) 1522 DGE_EVCNT_INCR(&sc->sc_ev_txqe); 1523 #endif 1524 dge_txintr(sc); 1525 1526 if (icr & (ICR_LSC|ICR_RXSEQ)) { 1527 DGE_EVCNT_INCR(&sc->sc_ev_linkintr); 1528 dge_linkintr(sc, icr); 1529 } 1530 1531 if (icr & ICR_RXO) { 1532 printf("%s: Receive overrun\n", device_xname(&sc->sc_dev)); 1533 wantinit = 1; 1534 } 1535 } 1536 1537 if (handled) { 1538 if (wantinit) 1539 dge_init(ifp); 1540 1541 /* Try to get more packets going. */ 1542 dge_start(ifp); 1543 } 1544 1545 return (handled); 1546 } 1547 1548 /* 1549 * dge_txintr: 1550 * 1551 * Helper; handle transmit interrupts. 1552 */ 1553 static void 1554 dge_txintr(struct dge_softc *sc) 1555 { 1556 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1557 struct dge_txsoft *txs; 1558 uint8_t status; 1559 int i; 1560 1561 ifp->if_flags &= ~IFF_OACTIVE; 1562 1563 /* 1564 * Go through the Tx list and free mbufs for those 1565 * frames which have been transmitted. 1566 */ 1567 for (i = sc->sc_txsdirty; sc->sc_txsfree != DGE_TXQUEUELEN; 1568 i = DGE_NEXTTXS(i), sc->sc_txsfree++) { 1569 txs = &sc->sc_txsoft[i]; 1570 1571 DPRINTF(DGE_DEBUG_TX, 1572 ("%s: TX: checking job %d\n", device_xname(&sc->sc_dev), i)); 1573 1574 DGE_CDTXSYNC(sc, txs->txs_firstdesc, txs->txs_dmamap->dm_nsegs, 1575 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 1576 1577 status = 1578 sc->sc_txdescs[txs->txs_lastdesc].dt_status; 1579 if ((status & TDESC_STA_DD) == 0) { 1580 DGE_CDTXSYNC(sc, txs->txs_lastdesc, 1, 1581 BUS_DMASYNC_PREREAD); 1582 break; 1583 } 1584 1585 DPRINTF(DGE_DEBUG_TX, 1586 ("%s: TX: job %d done: descs %d..%d\n", 1587 device_xname(&sc->sc_dev), i, txs->txs_firstdesc, 1588 txs->txs_lastdesc)); 1589 1590 ifp->if_opackets++; 1591 sc->sc_txfree += txs->txs_ndesc; 1592 bus_dmamap_sync(sc->sc_dmat, txs->txs_dmamap, 1593 0, txs->txs_dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE); 1594 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 1595 m_freem(txs->txs_mbuf); 1596 txs->txs_mbuf = NULL; 1597 } 1598 1599 /* Update the dirty transmit buffer pointer. */ 1600 sc->sc_txsdirty = i; 1601 DPRINTF(DGE_DEBUG_TX, 1602 ("%s: TX: txsdirty -> %d\n", device_xname(&sc->sc_dev), i)); 1603 1604 /* 1605 * If there are no more pending transmissions, cancel the watchdog 1606 * timer. 1607 */ 1608 if (sc->sc_txsfree == DGE_TXQUEUELEN) 1609 ifp->if_timer = 0; 1610 } 1611 1612 /* 1613 * dge_rxintr: 1614 * 1615 * Helper; handle receive interrupts. 1616 */ 1617 static void 1618 dge_rxintr(struct dge_softc *sc) 1619 { 1620 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1621 struct dge_rxsoft *rxs; 1622 struct mbuf *m; 1623 int i, len; 1624 uint8_t status, errors; 1625 1626 for (i = sc->sc_rxptr;; i = DGE_NEXTRX(i)) { 1627 rxs = &sc->sc_rxsoft[i]; 1628 1629 DPRINTF(DGE_DEBUG_RX, 1630 ("%s: RX: checking descriptor %d\n", 1631 device_xname(&sc->sc_dev), i)); 1632 1633 DGE_CDRXSYNC(sc, i, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 1634 1635 status = sc->sc_rxdescs[i].dr_status; 1636 errors = sc->sc_rxdescs[i].dr_errors; 1637 len = le16toh(sc->sc_rxdescs[i].dr_len); 1638 1639 if ((status & RDESC_STS_DD) == 0) { 1640 /* 1641 * We have processed all of the receive descriptors. 1642 */ 1643 DGE_CDRXSYNC(sc, i, BUS_DMASYNC_PREREAD); 1644 break; 1645 } 1646 1647 if (__predict_false(sc->sc_rxdiscard)) { 1648 DPRINTF(DGE_DEBUG_RX, 1649 ("%s: RX: discarding contents of descriptor %d\n", 1650 device_xname(&sc->sc_dev), i)); 1651 DGE_INIT_RXDESC(sc, i); 1652 if (status & RDESC_STS_EOP) { 1653 /* Reset our state. */ 1654 DPRINTF(DGE_DEBUG_RX, 1655 ("%s: RX: resetting rxdiscard -> 0\n", 1656 device_xname(&sc->sc_dev))); 1657 sc->sc_rxdiscard = 0; 1658 } 1659 continue; 1660 } 1661 1662 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 1663 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 1664 1665 m = rxs->rxs_mbuf; 1666 1667 /* 1668 * Add a new receive buffer to the ring. 1669 */ 1670 if (dge_add_rxbuf(sc, i) != 0) { 1671 /* 1672 * Failed, throw away what we've done so 1673 * far, and discard the rest of the packet. 1674 */ 1675 ifp->if_ierrors++; 1676 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 1677 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 1678 DGE_INIT_RXDESC(sc, i); 1679 if ((status & RDESC_STS_EOP) == 0) 1680 sc->sc_rxdiscard = 1; 1681 if (sc->sc_rxhead != NULL) 1682 m_freem(sc->sc_rxhead); 1683 DGE_RXCHAIN_RESET(sc); 1684 DPRINTF(DGE_DEBUG_RX, 1685 ("%s: RX: Rx buffer allocation failed, " 1686 "dropping packet%s\n", device_xname(&sc->sc_dev), 1687 sc->sc_rxdiscard ? " (discard)" : "")); 1688 continue; 1689 } 1690 DGE_INIT_RXDESC(sc, DGE_PREVRX(i)); /* Write the descriptor */ 1691 1692 DGE_RXCHAIN_LINK(sc, m); 1693 1694 m->m_len = len; 1695 1696 DPRINTF(DGE_DEBUG_RX, 1697 ("%s: RX: buffer at %p len %d\n", 1698 device_xname(&sc->sc_dev), m->m_data, len)); 1699 1700 /* 1701 * If this is not the end of the packet, keep 1702 * looking. 1703 */ 1704 if ((status & RDESC_STS_EOP) == 0) { 1705 sc->sc_rxlen += len; 1706 DPRINTF(DGE_DEBUG_RX, 1707 ("%s: RX: not yet EOP, rxlen -> %d\n", 1708 device_xname(&sc->sc_dev), sc->sc_rxlen)); 1709 continue; 1710 } 1711 1712 /* 1713 * Okay, we have the entire packet now... 1714 */ 1715 *sc->sc_rxtailp = NULL; 1716 m = sc->sc_rxhead; 1717 len += sc->sc_rxlen; 1718 1719 DGE_RXCHAIN_RESET(sc); 1720 1721 DPRINTF(DGE_DEBUG_RX, 1722 ("%s: RX: have entire packet, len -> %d\n", 1723 device_xname(&sc->sc_dev), len)); 1724 1725 /* 1726 * If an error occurred, update stats and drop the packet. 1727 */ 1728 if (errors & 1729 (RDESC_ERR_CE|RDESC_ERR_SE|RDESC_ERR_P|RDESC_ERR_RXE)) { 1730 ifp->if_ierrors++; 1731 if (errors & RDESC_ERR_SE) 1732 printf("%s: symbol error\n", 1733 device_xname(&sc->sc_dev)); 1734 else if (errors & RDESC_ERR_P) 1735 printf("%s: parity error\n", 1736 device_xname(&sc->sc_dev)); 1737 else if (errors & RDESC_ERR_CE) 1738 printf("%s: CRC error\n", 1739 device_xname(&sc->sc_dev)); 1740 m_freem(m); 1741 continue; 1742 } 1743 1744 /* 1745 * No errors. Receive the packet. 1746 */ 1747 m->m_pkthdr.rcvif = ifp; 1748 m->m_pkthdr.len = len; 1749 1750 /* 1751 * Set up checksum info for this packet. 1752 */ 1753 if (status & RDESC_STS_IPCS) { 1754 DGE_EVCNT_INCR(&sc->sc_ev_rxipsum); 1755 m->m_pkthdr.csum_flags |= M_CSUM_IPv4; 1756 if (errors & RDESC_ERR_IPE) 1757 m->m_pkthdr.csum_flags |= M_CSUM_IPv4_BAD; 1758 } 1759 if (status & RDESC_STS_TCPCS) { 1760 /* 1761 * Note: we don't know if this was TCP or UDP, 1762 * so we just set both bits, and expect the 1763 * upper layers to deal. 1764 */ 1765 DGE_EVCNT_INCR(&sc->sc_ev_rxtusum); 1766 m->m_pkthdr.csum_flags |= M_CSUM_TCPv4|M_CSUM_UDPv4; 1767 if (errors & RDESC_ERR_TCPE) 1768 m->m_pkthdr.csum_flags |= M_CSUM_TCP_UDP_BAD; 1769 } 1770 1771 ifp->if_ipackets++; 1772 1773 /* Pass this up to any BPF listeners. */ 1774 bpf_mtap(ifp, m); 1775 1776 /* Pass it on. */ 1777 (*ifp->if_input)(ifp, m); 1778 } 1779 1780 /* Update the receive pointer. */ 1781 sc->sc_rxptr = i; 1782 1783 DPRINTF(DGE_DEBUG_RX, 1784 ("%s: RX: rxptr -> %d\n", device_xname(&sc->sc_dev), i)); 1785 } 1786 1787 /* 1788 * dge_linkintr: 1789 * 1790 * Helper; handle link interrupts. 1791 */ 1792 static void 1793 dge_linkintr(struct dge_softc *sc, uint32_t icr) 1794 { 1795 uint32_t status; 1796 1797 if (icr & ICR_LSC) { 1798 status = CSR_READ(sc, DGE_STATUS); 1799 if (status & STATUS_LINKUP) { 1800 DPRINTF(DGE_DEBUG_LINK, ("%s: LINK: LSC -> up\n", 1801 device_xname(&sc->sc_dev))); 1802 } else { 1803 DPRINTF(DGE_DEBUG_LINK, ("%s: LINK: LSC -> down\n", 1804 device_xname(&sc->sc_dev))); 1805 } 1806 } else if (icr & ICR_RXSEQ) { 1807 DPRINTF(DGE_DEBUG_LINK, 1808 ("%s: LINK: Receive sequence error\n", 1809 device_xname(&sc->sc_dev))); 1810 } 1811 /* XXX - fix errata */ 1812 } 1813 1814 /* 1815 * dge_reset: 1816 * 1817 * Reset the i82597 chip. 1818 */ 1819 static void 1820 dge_reset(struct dge_softc *sc) 1821 { 1822 int i; 1823 1824 /* 1825 * Do a chip reset. 1826 */ 1827 CSR_WRITE(sc, DGE_CTRL0, CTRL0_RST | sc->sc_ctrl0); 1828 1829 delay(10000); 1830 1831 for (i = 0; i < 1000; i++) { 1832 if ((CSR_READ(sc, DGE_CTRL0) & CTRL0_RST) == 0) 1833 break; 1834 delay(20); 1835 } 1836 1837 if (CSR_READ(sc, DGE_CTRL0) & CTRL0_RST) 1838 printf("%s: WARNING: reset failed to complete\n", 1839 device_xname(&sc->sc_dev)); 1840 /* 1841 * Reset the EEPROM logic. 1842 * This will cause the chip to reread its default values, 1843 * which doesn't happen otherwise (errata). 1844 */ 1845 CSR_WRITE(sc, DGE_CTRL1, CTRL1_EE_RST); 1846 delay(10000); 1847 } 1848 1849 /* 1850 * dge_init: [ifnet interface function] 1851 * 1852 * Initialize the interface. Must be called at splnet(). 1853 */ 1854 static int 1855 dge_init(struct ifnet *ifp) 1856 { 1857 struct dge_softc *sc = ifp->if_softc; 1858 struct dge_rxsoft *rxs; 1859 int i, error = 0; 1860 uint32_t reg; 1861 1862 /* 1863 * *_HDR_ALIGNED_P is constant 1 if __NO_STRICT_ALIGMENT is set. 1864 * There is a small but measurable benefit to avoiding the adjusment 1865 * of the descriptor so that the headers are aligned, for normal mtu, 1866 * on such platforms. One possibility is that the DMA itself is 1867 * slightly more efficient if the front of the entire packet (instead 1868 * of the front of the headers) is aligned. 1869 * 1870 * Note we must always set align_tweak to 0 if we are using 1871 * jumbo frames. 1872 */ 1873 #ifdef __NO_STRICT_ALIGNMENT 1874 sc->sc_align_tweak = 0; 1875 #else 1876 if ((ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN) > (MCLBYTES - 2)) 1877 sc->sc_align_tweak = 0; 1878 else 1879 sc->sc_align_tweak = 2; 1880 #endif /* __NO_STRICT_ALIGNMENT */ 1881 1882 /* Cancel any pending I/O. */ 1883 dge_stop(ifp, 0); 1884 1885 /* Reset the chip to a known state. */ 1886 dge_reset(sc); 1887 1888 /* Initialize the transmit descriptor ring. */ 1889 memset(sc->sc_txdescs, 0, sizeof(sc->sc_txdescs)); 1890 DGE_CDTXSYNC(sc, 0, DGE_NTXDESC, 1891 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 1892 sc->sc_txfree = DGE_NTXDESC; 1893 sc->sc_txnext = 0; 1894 1895 sc->sc_txctx_ipcs = 0xffffffff; 1896 sc->sc_txctx_tucs = 0xffffffff; 1897 1898 CSR_WRITE(sc, DGE_TDBAH, 0); 1899 CSR_WRITE(sc, DGE_TDBAL, DGE_CDTXADDR(sc, 0)); 1900 CSR_WRITE(sc, DGE_TDLEN, sizeof(sc->sc_txdescs)); 1901 CSR_WRITE(sc, DGE_TDH, 0); 1902 CSR_WRITE(sc, DGE_TDT, 0); 1903 CSR_WRITE(sc, DGE_TIDV, TIDV); 1904 1905 #if 0 1906 CSR_WRITE(sc, DGE_TXDCTL, TXDCTL_PTHRESH(0) | 1907 TXDCTL_HTHRESH(0) | TXDCTL_WTHRESH(0)); 1908 #endif 1909 CSR_WRITE(sc, DGE_RXDCTL, 1910 RXDCTL_PTHRESH(RXDCTL_PTHRESH_VAL) | 1911 RXDCTL_HTHRESH(RXDCTL_HTHRESH_VAL) | 1912 RXDCTL_WTHRESH(RXDCTL_WTHRESH_VAL)); 1913 1914 /* Initialize the transmit job descriptors. */ 1915 for (i = 0; i < DGE_TXQUEUELEN; i++) 1916 sc->sc_txsoft[i].txs_mbuf = NULL; 1917 sc->sc_txsfree = DGE_TXQUEUELEN; 1918 sc->sc_txsnext = 0; 1919 sc->sc_txsdirty = 0; 1920 1921 /* 1922 * Initialize the receive descriptor and receive job 1923 * descriptor rings. 1924 */ 1925 CSR_WRITE(sc, DGE_RDBAH, 0); 1926 CSR_WRITE(sc, DGE_RDBAL, DGE_CDRXADDR(sc, 0)); 1927 CSR_WRITE(sc, DGE_RDLEN, sizeof(sc->sc_rxdescs)); 1928 CSR_WRITE(sc, DGE_RDH, DGE_RXSPACE); 1929 CSR_WRITE(sc, DGE_RDT, 0); 1930 CSR_WRITE(sc, DGE_RDTR, RDTR | 0x80000000); 1931 CSR_WRITE(sc, DGE_FCRTL, FCRTL | FCRTL_XONE); 1932 CSR_WRITE(sc, DGE_FCRTH, FCRTH); 1933 1934 for (i = 0; i < DGE_NRXDESC; i++) { 1935 rxs = &sc->sc_rxsoft[i]; 1936 if (rxs->rxs_mbuf == NULL) { 1937 if ((error = dge_add_rxbuf(sc, i)) != 0) { 1938 printf("%s: unable to allocate or map rx " 1939 "buffer %d, error = %d\n", 1940 device_xname(&sc->sc_dev), i, error); 1941 /* 1942 * XXX Should attempt to run with fewer receive 1943 * XXX buffers instead of just failing. 1944 */ 1945 dge_rxdrain(sc); 1946 goto out; 1947 } 1948 } 1949 DGE_INIT_RXDESC(sc, i); 1950 } 1951 sc->sc_rxptr = DGE_RXSPACE; 1952 sc->sc_rxdiscard = 0; 1953 DGE_RXCHAIN_RESET(sc); 1954 1955 if (sc->sc_ethercom.ec_capabilities & ETHERCAP_JUMBO_MTU) { 1956 sc->sc_ctrl0 |= CTRL0_JFE; 1957 CSR_WRITE(sc, DGE_MFS, ETHER_MAX_LEN_JUMBO << 16); 1958 } 1959 1960 /* Write the control registers. */ 1961 CSR_WRITE(sc, DGE_CTRL0, sc->sc_ctrl0); 1962 1963 /* 1964 * Set up checksum offload parameters. 1965 */ 1966 reg = CSR_READ(sc, DGE_RXCSUM); 1967 if (ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) 1968 reg |= RXCSUM_IPOFL; 1969 else 1970 reg &= ~RXCSUM_IPOFL; 1971 if (ifp->if_capenable & (IFCAP_CSUM_TCPv4_Rx | IFCAP_CSUM_UDPv4_Rx)) 1972 reg |= RXCSUM_IPOFL | RXCSUM_TUOFL; 1973 else { 1974 reg &= ~RXCSUM_TUOFL; 1975 if ((ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) == 0) 1976 reg &= ~RXCSUM_IPOFL; 1977 } 1978 CSR_WRITE(sc, DGE_RXCSUM, reg); 1979 1980 /* 1981 * Set up the interrupt registers. 1982 */ 1983 CSR_WRITE(sc, DGE_IMC, 0xffffffffU); 1984 sc->sc_icr = ICR_TXDW | ICR_LSC | ICR_RXSEQ | ICR_RXDMT0 | 1985 ICR_RXO | ICR_RXT0; 1986 1987 CSR_WRITE(sc, DGE_IMS, sc->sc_icr); 1988 1989 /* 1990 * Set up the transmit control register. 1991 */ 1992 sc->sc_tctl = TCTL_TCE|TCTL_TPDE|TCTL_TXEN; 1993 CSR_WRITE(sc, DGE_TCTL, sc->sc_tctl); 1994 1995 /* 1996 * Set up the receive control register; we actually program 1997 * the register when we set the receive filter. Use multicast 1998 * address offset type 0. 1999 */ 2000 sc->sc_mchash_type = 0; 2001 2002 sc->sc_rctl = RCTL_RXEN | RCTL_RDMTS_12 | RCTL_RPDA_MC | 2003 RCTL_CFF | RCTL_SECRC | RCTL_MO(sc->sc_mchash_type); 2004 2005 #ifdef DGE_OFFBYONE_RXBUG 2006 sc->sc_rctl |= RCTL_BSIZE_16k; 2007 #else 2008 switch(MCLBYTES) { 2009 case 2048: 2010 sc->sc_rctl |= RCTL_BSIZE_2k; 2011 break; 2012 case 4096: 2013 sc->sc_rctl |= RCTL_BSIZE_4k; 2014 break; 2015 case 8192: 2016 sc->sc_rctl |= RCTL_BSIZE_8k; 2017 break; 2018 case 16384: 2019 sc->sc_rctl |= RCTL_BSIZE_16k; 2020 break; 2021 default: 2022 panic("dge_init: MCLBYTES %d unsupported", MCLBYTES); 2023 } 2024 #endif 2025 2026 /* Set the receive filter. */ 2027 /* Also sets RCTL */ 2028 dge_set_filter(sc); 2029 2030 /* ...all done! */ 2031 ifp->if_flags |= IFF_RUNNING; 2032 ifp->if_flags &= ~IFF_OACTIVE; 2033 2034 out: 2035 if (error) 2036 printf("%s: interface not running\n", device_xname(&sc->sc_dev)); 2037 return (error); 2038 } 2039 2040 /* 2041 * dge_rxdrain: 2042 * 2043 * Drain the receive queue. 2044 */ 2045 static void 2046 dge_rxdrain(struct dge_softc *sc) 2047 { 2048 struct dge_rxsoft *rxs; 2049 int i; 2050 2051 for (i = 0; i < DGE_NRXDESC; i++) { 2052 rxs = &sc->sc_rxsoft[i]; 2053 if (rxs->rxs_mbuf != NULL) { 2054 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2055 m_freem(rxs->rxs_mbuf); 2056 rxs->rxs_mbuf = NULL; 2057 } 2058 } 2059 } 2060 2061 /* 2062 * dge_stop: [ifnet interface function] 2063 * 2064 * Stop transmission on the interface. 2065 */ 2066 static void 2067 dge_stop(struct ifnet *ifp, int disable) 2068 { 2069 struct dge_softc *sc = ifp->if_softc; 2070 struct dge_txsoft *txs; 2071 int i; 2072 2073 /* Stop the transmit and receive processes. */ 2074 CSR_WRITE(sc, DGE_TCTL, 0); 2075 CSR_WRITE(sc, DGE_RCTL, 0); 2076 2077 /* Release any queued transmit buffers. */ 2078 for (i = 0; i < DGE_TXQUEUELEN; i++) { 2079 txs = &sc->sc_txsoft[i]; 2080 if (txs->txs_mbuf != NULL) { 2081 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2082 m_freem(txs->txs_mbuf); 2083 txs->txs_mbuf = NULL; 2084 } 2085 } 2086 2087 /* Mark the interface as down and cancel the watchdog timer. */ 2088 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2089 ifp->if_timer = 0; 2090 2091 if (disable) 2092 dge_rxdrain(sc); 2093 } 2094 2095 /* 2096 * dge_add_rxbuf: 2097 * 2098 * Add a receive buffer to the indiciated descriptor. 2099 */ 2100 static int 2101 dge_add_rxbuf(struct dge_softc *sc, int idx) 2102 { 2103 struct dge_rxsoft *rxs = &sc->sc_rxsoft[idx]; 2104 struct mbuf *m; 2105 int error; 2106 #ifdef DGE_OFFBYONE_RXBUG 2107 void *buf; 2108 #endif 2109 2110 MGETHDR(m, M_DONTWAIT, MT_DATA); 2111 if (m == NULL) 2112 return (ENOBUFS); 2113 2114 #ifdef DGE_OFFBYONE_RXBUG 2115 if ((buf = dge_getbuf(sc)) == NULL) 2116 return ENOBUFS; 2117 2118 m->m_len = m->m_pkthdr.len = DGE_BUFFER_SIZE; 2119 MEXTADD(m, buf, DGE_BUFFER_SIZE, M_DEVBUF, dge_freebuf, sc); 2120 m->m_flags |= M_EXT_RW; 2121 2122 if (rxs->rxs_mbuf != NULL) 2123 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2124 rxs->rxs_mbuf = m; 2125 2126 error = bus_dmamap_load(sc->sc_dmat, rxs->rxs_dmamap, buf, 2127 DGE_BUFFER_SIZE, NULL, BUS_DMA_READ|BUS_DMA_NOWAIT); 2128 #else 2129 MCLGET(m, M_DONTWAIT); 2130 if ((m->m_flags & M_EXT) == 0) { 2131 m_freem(m); 2132 return (ENOBUFS); 2133 } 2134 2135 if (rxs->rxs_mbuf != NULL) 2136 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2137 2138 rxs->rxs_mbuf = m; 2139 2140 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 2141 error = bus_dmamap_load_mbuf(sc->sc_dmat, rxs->rxs_dmamap, m, 2142 BUS_DMA_READ|BUS_DMA_NOWAIT); 2143 #endif 2144 if (error) { 2145 printf("%s: unable to load rx DMA map %d, error = %d\n", 2146 device_xname(&sc->sc_dev), idx, error); 2147 panic("dge_add_rxbuf"); /* XXX XXX XXX */ 2148 } 2149 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 2150 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 2151 2152 return (0); 2153 } 2154 2155 /* 2156 * dge_set_ral: 2157 * 2158 * Set an entry in the receive address list. 2159 */ 2160 static void 2161 dge_set_ral(struct dge_softc *sc, const uint8_t *enaddr, int idx) 2162 { 2163 uint32_t ral_lo, ral_hi; 2164 2165 if (enaddr != NULL) { 2166 ral_lo = enaddr[0] | (enaddr[1] << 8) | (enaddr[2] << 16) | 2167 (enaddr[3] << 24); 2168 ral_hi = enaddr[4] | (enaddr[5] << 8); 2169 ral_hi |= RAH_AV; 2170 } else { 2171 ral_lo = 0; 2172 ral_hi = 0; 2173 } 2174 CSR_WRITE(sc, RA_ADDR(DGE_RAL, idx), ral_lo); 2175 CSR_WRITE(sc, RA_ADDR(DGE_RAH, idx), ral_hi); 2176 } 2177 2178 /* 2179 * dge_mchash: 2180 * 2181 * Compute the hash of the multicast address for the 4096-bit 2182 * multicast filter. 2183 */ 2184 static uint32_t 2185 dge_mchash(struct dge_softc *sc, const uint8_t *enaddr) 2186 { 2187 static const int lo_shift[4] = { 4, 3, 2, 0 }; 2188 static const int hi_shift[4] = { 4, 5, 6, 8 }; 2189 uint32_t hash; 2190 2191 hash = (enaddr[4] >> lo_shift[sc->sc_mchash_type]) | 2192 (((uint16_t) enaddr[5]) << hi_shift[sc->sc_mchash_type]); 2193 2194 return (hash & 0xfff); 2195 } 2196 2197 /* 2198 * dge_set_filter: 2199 * 2200 * Set up the receive filter. 2201 */ 2202 static void 2203 dge_set_filter(struct dge_softc *sc) 2204 { 2205 struct ethercom *ec = &sc->sc_ethercom; 2206 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 2207 struct ether_multi *enm; 2208 struct ether_multistep step; 2209 uint32_t hash, reg, bit; 2210 int i; 2211 2212 sc->sc_rctl &= ~(RCTL_BAM | RCTL_UPE | RCTL_MPE); 2213 2214 if (ifp->if_flags & IFF_BROADCAST) 2215 sc->sc_rctl |= RCTL_BAM; 2216 if (ifp->if_flags & IFF_PROMISC) { 2217 sc->sc_rctl |= RCTL_UPE; 2218 goto allmulti; 2219 } 2220 2221 /* 2222 * Set the station address in the first RAL slot, and 2223 * clear the remaining slots. 2224 */ 2225 dge_set_ral(sc, CLLADDR(ifp->if_sadl), 0); 2226 for (i = 1; i < RA_TABSIZE; i++) 2227 dge_set_ral(sc, NULL, i); 2228 2229 /* Clear out the multicast table. */ 2230 for (i = 0; i < MC_TABSIZE; i++) 2231 CSR_WRITE(sc, DGE_MTA + (i << 2), 0); 2232 2233 ETHER_FIRST_MULTI(step, ec, enm); 2234 while (enm != NULL) { 2235 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) { 2236 /* 2237 * We must listen to a range of multicast addresses. 2238 * For now, just accept all multicasts, rather than 2239 * trying to set only those filter bits needed to match 2240 * the range. (At this time, the only use of address 2241 * ranges is for IP multicast routing, for which the 2242 * range is big enough to require all bits set.) 2243 */ 2244 goto allmulti; 2245 } 2246 2247 hash = dge_mchash(sc, enm->enm_addrlo); 2248 2249 reg = (hash >> 5) & 0x7f; 2250 bit = hash & 0x1f; 2251 2252 hash = CSR_READ(sc, DGE_MTA + (reg << 2)); 2253 hash |= 1U << bit; 2254 2255 CSR_WRITE(sc, DGE_MTA + (reg << 2), hash); 2256 2257 ETHER_NEXT_MULTI(step, enm); 2258 } 2259 2260 ifp->if_flags &= ~IFF_ALLMULTI; 2261 goto setit; 2262 2263 allmulti: 2264 ifp->if_flags |= IFF_ALLMULTI; 2265 sc->sc_rctl |= RCTL_MPE; 2266 2267 setit: 2268 CSR_WRITE(sc, DGE_RCTL, sc->sc_rctl); 2269 } 2270 2271 /* 2272 * Read in the EEPROM info and verify checksum. 2273 */ 2274 int 2275 dge_read_eeprom(struct dge_softc *sc) 2276 { 2277 uint16_t cksum; 2278 int i; 2279 2280 cksum = 0; 2281 for (i = 0; i < EEPROM_SIZE; i++) { 2282 sc->sc_eeprom[i] = dge_eeprom_word(sc, i); 2283 cksum += sc->sc_eeprom[i]; 2284 } 2285 return cksum != EEPROM_CKSUM; 2286 } 2287 2288 2289 /* 2290 * Read a 16-bit word from address addr in the serial EEPROM. 2291 */ 2292 uint16_t 2293 dge_eeprom_word(struct dge_softc *sc, int addr) 2294 { 2295 uint32_t reg; 2296 uint16_t rval = 0; 2297 int i; 2298 2299 reg = CSR_READ(sc, DGE_EECD) & ~(EECD_SK|EECD_DI|EECD_CS); 2300 2301 /* Lower clock pulse (and data in to chip) */ 2302 CSR_WRITE(sc, DGE_EECD, reg); 2303 /* Select chip */ 2304 CSR_WRITE(sc, DGE_EECD, reg|EECD_CS); 2305 2306 /* Send read command */ 2307 dge_eeprom_clockout(sc, 1); 2308 dge_eeprom_clockout(sc, 1); 2309 dge_eeprom_clockout(sc, 0); 2310 2311 /* Send address */ 2312 for (i = 5; i >= 0; i--) 2313 dge_eeprom_clockout(sc, (addr >> i) & 1); 2314 2315 /* Read data */ 2316 for (i = 0; i < 16; i++) { 2317 rval <<= 1; 2318 rval |= dge_eeprom_clockin(sc); 2319 } 2320 2321 /* Deselect chip */ 2322 CSR_WRITE(sc, DGE_EECD, reg); 2323 2324 return rval; 2325 } 2326 2327 /* 2328 * Clock out a single bit to the EEPROM. 2329 */ 2330 void 2331 dge_eeprom_clockout(struct dge_softc *sc, int bit) 2332 { 2333 int reg; 2334 2335 reg = CSR_READ(sc, DGE_EECD) & ~(EECD_DI|EECD_SK); 2336 if (bit) 2337 reg |= EECD_DI; 2338 2339 CSR_WRITE(sc, DGE_EECD, reg); 2340 delay(2); 2341 CSR_WRITE(sc, DGE_EECD, reg|EECD_SK); 2342 delay(2); 2343 CSR_WRITE(sc, DGE_EECD, reg); 2344 delay(2); 2345 } 2346 2347 /* 2348 * Clock in a single bit from EEPROM. 2349 */ 2350 int 2351 dge_eeprom_clockin(struct dge_softc *sc) 2352 { 2353 int reg, rv; 2354 2355 reg = CSR_READ(sc, DGE_EECD) & ~(EECD_DI|EECD_DO|EECD_SK); 2356 2357 CSR_WRITE(sc, DGE_EECD, reg|EECD_SK); /* Raise clock */ 2358 delay(2); 2359 rv = (CSR_READ(sc, DGE_EECD) & EECD_DO) != 0; /* Get bit */ 2360 CSR_WRITE(sc, DGE_EECD, reg); /* Lower clock */ 2361 delay(2); 2362 2363 return rv; 2364 } 2365 2366 static void 2367 dge_xgmii_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 2368 { 2369 struct dge_softc *sc = ifp->if_softc; 2370 2371 ifmr->ifm_status = IFM_AVALID; 2372 ifmr->ifm_active = IFM_ETHER|IFM_10G_LR; 2373 2374 if (CSR_READ(sc, DGE_STATUS) & STATUS_LINKUP) 2375 ifmr->ifm_status |= IFM_ACTIVE; 2376 } 2377 2378 static inline int 2379 phwait(struct dge_softc *sc, int p, int r, int d, int type) 2380 { 2381 int i, mdic; 2382 2383 CSR_WRITE(sc, DGE_MDIO, 2384 MDIO_PHY(p) | MDIO_REG(r) | MDIO_DEV(d) | type | MDIO_CMD); 2385 for (i = 0; i < 10; i++) { 2386 delay(10); 2387 if (((mdic = CSR_READ(sc, DGE_MDIO)) & MDIO_CMD) == 0) 2388 break; 2389 } 2390 return mdic; 2391 } 2392 2393 2394 static void 2395 dge_xgmii_writereg(device_t self, int phy, int reg, int val) 2396 { 2397 struct dge_softc *sc = device_private(self); 2398 int mdic; 2399 2400 CSR_WRITE(sc, DGE_MDIRW, val); 2401 if (((mdic = phwait(sc, phy, reg, 1, MDIO_ADDR)) & MDIO_CMD)) { 2402 printf("%s: address cycle timeout; phy %d reg %d\n", 2403 device_xname(&sc->sc_dev), phy, reg); 2404 return; 2405 } 2406 if (((mdic = phwait(sc, phy, reg, 1, MDIO_WRITE)) & MDIO_CMD)) { 2407 printf("%s: read cycle timeout; phy %d reg %d\n", 2408 device_xname(&sc->sc_dev), phy, reg); 2409 return; 2410 } 2411 } 2412 2413 static void 2414 dge_xgmii_reset(struct dge_softc *sc) 2415 { 2416 dge_xgmii_writereg((void *)sc, 0, 0, BMCR_RESET); 2417 } 2418 2419 static int 2420 dge_xgmii_mediachange(struct ifnet *ifp) 2421 { 2422 return 0; 2423 } 2424