1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012-2014 Thomas Skibo <thomasskibo@yahoo.com> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * A network interface driver for Cadence GEM Gigabit Ethernet 31 * interface such as the one used in Xilinx Zynq-7000 SoC. 32 * 33 * Reference: Zynq-7000 All Programmable SoC Technical Reference Manual. 34 * (v1.4) November 16, 2012. Xilinx doc UG585. GEM is covered in Ch. 16 35 * and register definitions are in appendix B.18. 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/bus.h> 44 #include <sys/kernel.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/module.h> 48 #include <sys/rman.h> 49 #include <sys/socket.h> 50 #include <sys/sockio.h> 51 #include <sys/sysctl.h> 52 53 #include <machine/bus.h> 54 55 #include <net/ethernet.h> 56 #include <net/if.h> 57 #include <net/if_arp.h> 58 #include <net/if_dl.h> 59 #include <net/if_media.h> 60 #include <net/if_mib.h> 61 #include <net/if_types.h> 62 63 #ifdef INET 64 #include <netinet/in.h> 65 #include <netinet/in_systm.h> 66 #include <netinet/in_var.h> 67 #include <netinet/ip.h> 68 #endif 69 70 #include <net/bpf.h> 71 #include <net/bpfdesc.h> 72 73 #include <dev/fdt/fdt_common.h> 74 #include <dev/ofw/ofw_bus.h> 75 #include <dev/ofw/ofw_bus_subr.h> 76 77 #include <dev/mii/mii.h> 78 #include <dev/mii/miivar.h> 79 #include <dev/mii/mii_fdt.h> 80 81 #include <dev/extres/clk/clk.h> 82 83 #if BUS_SPACE_MAXADDR > BUS_SPACE_MAXADDR_32BIT 84 #define CGEM64 85 #endif 86 87 #include <dev/cadence/if_cgem_hw.h> 88 89 #include "miibus_if.h" 90 91 #define IF_CGEM_NAME "cgem" 92 93 #define CGEM_NUM_RX_DESCS 512 /* size of receive descriptor ring */ 94 #define CGEM_NUM_TX_DESCS 512 /* size of transmit descriptor ring */ 95 96 /* Default for sysctl rxbufs. Must be < CGEM_NUM_RX_DESCS of course. */ 97 #define DEFAULT_NUM_RX_BUFS 256 /* number of receive bufs to queue. */ 98 99 #define TX_MAX_DMA_SEGS 8 /* maximum segs in a tx mbuf dma */ 100 101 #define CGEM_CKSUM_ASSIST (CSUM_IP | CSUM_TCP | CSUM_UDP | \ 102 CSUM_TCP_IPV6 | CSUM_UDP_IPV6) 103 104 #define HWQUIRK_NONE 0 105 #define HWQUIRK_NEEDNULLQS 1 106 #define HWQUIRK_RXHANGWAR 2 107 #define HWQUIRK_TXCLK 4 108 #define HWQUIRK_PCLK 8 109 110 static struct ofw_compat_data compat_data[] = { 111 { "cdns,zynq-gem", HWQUIRK_RXHANGWAR | HWQUIRK_TXCLK }, 112 { "cdns,zynqmp-gem", HWQUIRK_NEEDNULLQS | HWQUIRK_TXCLK }, 113 { "microchip,mpfs-mss-gem", HWQUIRK_NEEDNULLQS | HWQUIRK_TXCLK }, 114 { "sifive,fu540-c000-gem", HWQUIRK_PCLK }, 115 { "sifive,fu740-c000-gem", HWQUIRK_PCLK }, 116 { "cdns,gem", HWQUIRK_NONE }, 117 { "cdns,macb", HWQUIRK_NONE }, 118 { "cadence,gem", HWQUIRK_NONE }, 119 { NULL, 0 } 120 }; 121 122 struct cgem_softc { 123 if_t ifp; 124 struct mtx sc_mtx; 125 device_t dev; 126 device_t miibus; 127 u_int mii_media_active; /* last active media */ 128 int if_old_flags; 129 struct resource *mem_res; 130 struct resource *irq_res; 131 void *intrhand; 132 struct callout tick_ch; 133 uint32_t net_ctl_shadow; 134 uint32_t net_cfg_shadow; 135 clk_t ref_clk; 136 int neednullqs; 137 int phy_contype; 138 139 bus_dma_tag_t desc_dma_tag; 140 bus_dma_tag_t mbuf_dma_tag; 141 142 /* receive descriptor ring */ 143 struct cgem_rx_desc *rxring; 144 bus_addr_t rxring_physaddr; 145 struct mbuf *rxring_m[CGEM_NUM_RX_DESCS]; 146 bus_dmamap_t rxring_m_dmamap[CGEM_NUM_RX_DESCS]; 147 int rxring_hd_ptr; /* where to put rcv bufs */ 148 int rxring_tl_ptr; /* where to get receives */ 149 int rxring_queued; /* how many rcv bufs queued */ 150 bus_dmamap_t rxring_dma_map; 151 int rxbufs; /* tunable number rcv bufs */ 152 int rxhangwar; /* rx hang work-around */ 153 u_int rxoverruns; /* rx overruns */ 154 u_int rxnobufs; /* rx buf ring empty events */ 155 u_int rxdmamapfails; /* rx dmamap failures */ 156 uint32_t rx_frames_prev; 157 158 /* transmit descriptor ring */ 159 struct cgem_tx_desc *txring; 160 bus_addr_t txring_physaddr; 161 struct mbuf *txring_m[CGEM_NUM_TX_DESCS]; 162 bus_dmamap_t txring_m_dmamap[CGEM_NUM_TX_DESCS]; 163 int txring_hd_ptr; /* where to put next xmits */ 164 int txring_tl_ptr; /* next xmit mbuf to free */ 165 int txring_queued; /* num xmits segs queued */ 166 u_int txfull; /* tx ring full events */ 167 u_int txdefrags; /* tx calls to m_defrag() */ 168 u_int txdefragfails; /* tx m_defrag() failures */ 169 u_int txdmamapfails; /* tx dmamap failures */ 170 171 /* null descriptor rings */ 172 void *null_qs; 173 bus_addr_t null_qs_physaddr; 174 175 /* hardware provided statistics */ 176 struct cgem_hw_stats { 177 uint64_t tx_bytes; 178 uint32_t tx_frames; 179 uint32_t tx_frames_bcast; 180 uint32_t tx_frames_multi; 181 uint32_t tx_frames_pause; 182 uint32_t tx_frames_64b; 183 uint32_t tx_frames_65to127b; 184 uint32_t tx_frames_128to255b; 185 uint32_t tx_frames_256to511b; 186 uint32_t tx_frames_512to1023b; 187 uint32_t tx_frames_1024to1536b; 188 uint32_t tx_under_runs; 189 uint32_t tx_single_collisn; 190 uint32_t tx_multi_collisn; 191 uint32_t tx_excsv_collisn; 192 uint32_t tx_late_collisn; 193 uint32_t tx_deferred_frames; 194 uint32_t tx_carrier_sense_errs; 195 196 uint64_t rx_bytes; 197 uint32_t rx_frames; 198 uint32_t rx_frames_bcast; 199 uint32_t rx_frames_multi; 200 uint32_t rx_frames_pause; 201 uint32_t rx_frames_64b; 202 uint32_t rx_frames_65to127b; 203 uint32_t rx_frames_128to255b; 204 uint32_t rx_frames_256to511b; 205 uint32_t rx_frames_512to1023b; 206 uint32_t rx_frames_1024to1536b; 207 uint32_t rx_frames_undersize; 208 uint32_t rx_frames_oversize; 209 uint32_t rx_frames_jabber; 210 uint32_t rx_frames_fcs_errs; 211 uint32_t rx_frames_length_errs; 212 uint32_t rx_symbol_errs; 213 uint32_t rx_align_errs; 214 uint32_t rx_resource_errs; 215 uint32_t rx_overrun_errs; 216 uint32_t rx_ip_hdr_csum_errs; 217 uint32_t rx_tcp_csum_errs; 218 uint32_t rx_udp_csum_errs; 219 } stats; 220 }; 221 222 #define RD4(sc, off) (bus_read_4((sc)->mem_res, (off))) 223 #define WR4(sc, off, val) (bus_write_4((sc)->mem_res, (off), (val))) 224 #define BARRIER(sc, off, len, flags) \ 225 (bus_barrier((sc)->mem_res, (off), (len), (flags)) 226 227 #define CGEM_LOCK(sc) mtx_lock(&(sc)->sc_mtx) 228 #define CGEM_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx) 229 #define CGEM_LOCK_INIT(sc) mtx_init(&(sc)->sc_mtx, \ 230 device_get_nameunit((sc)->dev), MTX_NETWORK_LOCK, MTX_DEF) 231 #define CGEM_LOCK_DESTROY(sc) mtx_destroy(&(sc)->sc_mtx) 232 #define CGEM_ASSERT_LOCKED(sc) mtx_assert(&(sc)->sc_mtx, MA_OWNED) 233 234 /* Allow platforms to optionally provide a way to set the reference clock. */ 235 int cgem_set_ref_clk(int unit, int frequency); 236 237 static devclass_t cgem_devclass; 238 239 static int cgem_probe(device_t dev); 240 static int cgem_attach(device_t dev); 241 static int cgem_detach(device_t dev); 242 static void cgem_tick(void *); 243 static void cgem_intr(void *); 244 245 static void cgem_mediachange(struct cgem_softc *, struct mii_data *); 246 247 static void 248 cgem_get_mac(struct cgem_softc *sc, u_char eaddr[]) 249 { 250 int i; 251 uint32_t rnd; 252 253 /* See if boot loader gave us a MAC address already. */ 254 for (i = 0; i < 4; i++) { 255 uint32_t low = RD4(sc, CGEM_SPEC_ADDR_LOW(i)); 256 uint32_t high = RD4(sc, CGEM_SPEC_ADDR_HI(i)) & 0xffff; 257 if (low != 0 || high != 0) { 258 eaddr[0] = low & 0xff; 259 eaddr[1] = (low >> 8) & 0xff; 260 eaddr[2] = (low >> 16) & 0xff; 261 eaddr[3] = (low >> 24) & 0xff; 262 eaddr[4] = high & 0xff; 263 eaddr[5] = (high >> 8) & 0xff; 264 break; 265 } 266 } 267 268 /* No MAC from boot loader? Assign a random one. */ 269 if (i == 4) { 270 rnd = arc4random(); 271 272 eaddr[0] = 'b'; 273 eaddr[1] = 's'; 274 eaddr[2] = 'd'; 275 eaddr[3] = (rnd >> 16) & 0xff; 276 eaddr[4] = (rnd >> 8) & 0xff; 277 eaddr[5] = rnd & 0xff; 278 279 device_printf(sc->dev, "no mac address found, assigning " 280 "random: %02x:%02x:%02x:%02x:%02x:%02x\n", eaddr[0], 281 eaddr[1], eaddr[2], eaddr[3], eaddr[4], eaddr[5]); 282 } 283 284 /* Move address to first slot and zero out the rest. */ 285 WR4(sc, CGEM_SPEC_ADDR_LOW(0), (eaddr[3] << 24) | 286 (eaddr[2] << 16) | (eaddr[1] << 8) | eaddr[0]); 287 WR4(sc, CGEM_SPEC_ADDR_HI(0), (eaddr[5] << 8) | eaddr[4]); 288 289 for (i = 1; i < 4; i++) { 290 WR4(sc, CGEM_SPEC_ADDR_LOW(i), 0); 291 WR4(sc, CGEM_SPEC_ADDR_HI(i), 0); 292 } 293 } 294 295 /* 296 * cgem_mac_hash(): map 48-bit address to a 6-bit hash. The 6-bit hash 297 * corresponds to a bit in a 64-bit hash register. Setting that bit in the 298 * hash register enables reception of all frames with a destination address 299 * that hashes to that 6-bit value. 300 * 301 * The hash function is described in sec. 16.2.3 in the Zynq-7000 Tech 302 * Reference Manual. Bits 0-5 in the hash are the exclusive-or of 303 * every sixth bit in the destination address. 304 */ 305 static int 306 cgem_mac_hash(u_char eaddr[]) 307 { 308 int hash; 309 int i, j; 310 311 hash = 0; 312 for (i = 0; i < 6; i++) 313 for (j = i; j < 48; j += 6) 314 if ((eaddr[j >> 3] & (1 << (j & 7))) != 0) 315 hash ^= (1 << i); 316 317 return hash; 318 } 319 320 static u_int 321 cgem_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt) 322 { 323 uint32_t *hashes = arg; 324 int index; 325 326 index = cgem_mac_hash(LLADDR(sdl)); 327 if (index > 31) 328 hashes[0] |= (1U << (index - 32)); 329 else 330 hashes[1] |= (1U << index); 331 332 return (1); 333 } 334 335 /* 336 * After any change in rx flags or multi-cast addresses, set up hash registers 337 * and net config register bits. 338 */ 339 static void 340 cgem_rx_filter(struct cgem_softc *sc) 341 { 342 if_t ifp = sc->ifp; 343 uint32_t hashes[2] = { 0, 0 }; 344 345 sc->net_cfg_shadow &= ~(CGEM_NET_CFG_MULTI_HASH_EN | 346 CGEM_NET_CFG_NO_BCAST | CGEM_NET_CFG_COPY_ALL); 347 348 if ((if_getflags(ifp) & IFF_PROMISC) != 0) 349 sc->net_cfg_shadow |= CGEM_NET_CFG_COPY_ALL; 350 else { 351 if ((if_getflags(ifp) & IFF_BROADCAST) == 0) 352 sc->net_cfg_shadow |= CGEM_NET_CFG_NO_BCAST; 353 if ((if_getflags(ifp) & IFF_ALLMULTI) != 0) { 354 hashes[0] = 0xffffffff; 355 hashes[1] = 0xffffffff; 356 } else 357 if_foreach_llmaddr(ifp, cgem_hash_maddr, hashes); 358 359 if (hashes[0] != 0 || hashes[1] != 0) 360 sc->net_cfg_shadow |= CGEM_NET_CFG_MULTI_HASH_EN; 361 } 362 363 WR4(sc, CGEM_HASH_TOP, hashes[0]); 364 WR4(sc, CGEM_HASH_BOT, hashes[1]); 365 WR4(sc, CGEM_NET_CFG, sc->net_cfg_shadow); 366 } 367 368 /* For bus_dmamap_load() callback. */ 369 static void 370 cgem_getaddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 371 { 372 373 if (nsegs != 1 || error != 0) 374 return; 375 *(bus_addr_t *)arg = segs[0].ds_addr; 376 } 377 378 /* Set up null queues for priority queues we actually can't disable. */ 379 static void 380 cgem_null_qs(struct cgem_softc *sc) 381 { 382 struct cgem_rx_desc *rx_desc; 383 struct cgem_tx_desc *tx_desc; 384 uint32_t queue_mask; 385 int n; 386 387 /* Read design config register 6 to determine number of queues. */ 388 queue_mask = (RD4(sc, CGEM_DESIGN_CFG6) & 389 CGEM_DESIGN_CFG6_DMA_PRIO_Q_MASK) >> 1; 390 if (queue_mask == 0) 391 return; 392 393 /* Create empty RX queue and empty TX buf queues. */ 394 memset(sc->null_qs, 0, sizeof(struct cgem_rx_desc) + 395 sizeof(struct cgem_tx_desc)); 396 rx_desc = sc->null_qs; 397 rx_desc->addr = CGEM_RXDESC_OWN | CGEM_RXDESC_WRAP; 398 tx_desc = (struct cgem_tx_desc *)(rx_desc + 1); 399 tx_desc->ctl = CGEM_TXDESC_USED | CGEM_TXDESC_WRAP; 400 401 /* Point all valid ring base pointers to the null queues. */ 402 for (n = 1; (queue_mask & 1) != 0; n++, queue_mask >>= 1) { 403 WR4(sc, CGEM_RX_QN_BAR(n), sc->null_qs_physaddr); 404 WR4(sc, CGEM_TX_QN_BAR(n), sc->null_qs_physaddr + 405 sizeof(struct cgem_rx_desc)); 406 } 407 } 408 409 /* Create DMA'able descriptor rings. */ 410 static int 411 cgem_setup_descs(struct cgem_softc *sc) 412 { 413 int i, err; 414 int desc_rings_size = CGEM_NUM_RX_DESCS * sizeof(struct cgem_rx_desc) + 415 CGEM_NUM_TX_DESCS * sizeof(struct cgem_tx_desc); 416 417 if (sc->neednullqs) 418 desc_rings_size += sizeof(struct cgem_rx_desc) + 419 sizeof(struct cgem_tx_desc); 420 421 sc->txring = NULL; 422 sc->rxring = NULL; 423 424 /* Allocate non-cached DMA space for RX and TX descriptors. */ 425 err = bus_dma_tag_create(bus_get_dma_tag(sc->dev), 1, 426 #ifdef CGEM64 427 1ULL << 32, /* Do not cross a 4G boundary. */ 428 #else 429 0, 430 #endif 431 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 432 desc_rings_size, 1, desc_rings_size, 0, 433 busdma_lock_mutex, &sc->sc_mtx, &sc->desc_dma_tag); 434 if (err) 435 return (err); 436 437 /* Set up a bus_dma_tag for mbufs. */ 438 err = bus_dma_tag_create(bus_get_dma_tag(sc->dev), 1, 0, 439 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 440 TX_MAX_DMA_SEGS, MCLBYTES, 0, busdma_lock_mutex, &sc->sc_mtx, 441 &sc->mbuf_dma_tag); 442 if (err) 443 return (err); 444 445 /* 446 * Allocate DMA memory. We allocate transmit, receive and null 447 * descriptor queues all at once because the hardware only provides 448 * one register for the upper 32 bits of rx and tx descriptor queues 449 * hardware addresses. 450 */ 451 err = bus_dmamem_alloc(sc->desc_dma_tag, (void **)&sc->rxring, 452 BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_ZERO, 453 &sc->rxring_dma_map); 454 if (err) 455 return (err); 456 457 /* Load descriptor DMA memory. */ 458 err = bus_dmamap_load(sc->desc_dma_tag, sc->rxring_dma_map, 459 (void *)sc->rxring, desc_rings_size, 460 cgem_getaddr, &sc->rxring_physaddr, BUS_DMA_NOWAIT); 461 if (err) 462 return (err); 463 464 /* Initialize RX descriptors. */ 465 for (i = 0; i < CGEM_NUM_RX_DESCS; i++) { 466 sc->rxring[i].addr = CGEM_RXDESC_OWN; 467 sc->rxring[i].ctl = 0; 468 sc->rxring_m[i] = NULL; 469 sc->rxring_m_dmamap[i] = NULL; 470 } 471 sc->rxring[CGEM_NUM_RX_DESCS - 1].addr |= CGEM_RXDESC_WRAP; 472 473 sc->rxring_hd_ptr = 0; 474 sc->rxring_tl_ptr = 0; 475 sc->rxring_queued = 0; 476 477 sc->txring = (struct cgem_tx_desc *)(sc->rxring + CGEM_NUM_RX_DESCS); 478 sc->txring_physaddr = sc->rxring_physaddr + CGEM_NUM_RX_DESCS * 479 sizeof(struct cgem_rx_desc); 480 481 /* Initialize TX descriptor ring. */ 482 for (i = 0; i < CGEM_NUM_TX_DESCS; i++) { 483 sc->txring[i].addr = 0; 484 sc->txring[i].ctl = CGEM_TXDESC_USED; 485 sc->txring_m[i] = NULL; 486 sc->txring_m_dmamap[i] = NULL; 487 } 488 sc->txring[CGEM_NUM_TX_DESCS - 1].ctl |= CGEM_TXDESC_WRAP; 489 490 sc->txring_hd_ptr = 0; 491 sc->txring_tl_ptr = 0; 492 sc->txring_queued = 0; 493 494 if (sc->neednullqs) { 495 sc->null_qs = (void *)(sc->txring + CGEM_NUM_TX_DESCS); 496 sc->null_qs_physaddr = sc->txring_physaddr + 497 CGEM_NUM_TX_DESCS * sizeof(struct cgem_tx_desc); 498 499 cgem_null_qs(sc); 500 } 501 502 return (0); 503 } 504 505 /* Fill receive descriptor ring with mbufs. */ 506 static void 507 cgem_fill_rqueue(struct cgem_softc *sc) 508 { 509 struct mbuf *m = NULL; 510 bus_dma_segment_t segs[TX_MAX_DMA_SEGS]; 511 int nsegs; 512 513 CGEM_ASSERT_LOCKED(sc); 514 515 while (sc->rxring_queued < sc->rxbufs) { 516 /* Get a cluster mbuf. */ 517 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 518 if (m == NULL) 519 break; 520 521 m->m_len = MCLBYTES; 522 m->m_pkthdr.len = MCLBYTES; 523 m->m_pkthdr.rcvif = sc->ifp; 524 525 /* Load map and plug in physical address. */ 526 if (bus_dmamap_create(sc->mbuf_dma_tag, 0, 527 &sc->rxring_m_dmamap[sc->rxring_hd_ptr])) { 528 sc->rxdmamapfails++; 529 m_free(m); 530 break; 531 } 532 if (bus_dmamap_load_mbuf_sg(sc->mbuf_dma_tag, 533 sc->rxring_m_dmamap[sc->rxring_hd_ptr], m, 534 segs, &nsegs, BUS_DMA_NOWAIT)) { 535 sc->rxdmamapfails++; 536 bus_dmamap_destroy(sc->mbuf_dma_tag, 537 sc->rxring_m_dmamap[sc->rxring_hd_ptr]); 538 sc->rxring_m_dmamap[sc->rxring_hd_ptr] = NULL; 539 m_free(m); 540 break; 541 } 542 sc->rxring_m[sc->rxring_hd_ptr] = m; 543 544 /* Sync cache with receive buffer. */ 545 bus_dmamap_sync(sc->mbuf_dma_tag, 546 sc->rxring_m_dmamap[sc->rxring_hd_ptr], 547 BUS_DMASYNC_PREREAD); 548 549 /* Write rx descriptor and increment head pointer. */ 550 sc->rxring[sc->rxring_hd_ptr].ctl = 0; 551 #ifdef CGEM64 552 sc->rxring[sc->rxring_hd_ptr].addrhi = segs[0].ds_addr >> 32; 553 #endif 554 if (sc->rxring_hd_ptr == CGEM_NUM_RX_DESCS - 1) { 555 sc->rxring[sc->rxring_hd_ptr].addr = segs[0].ds_addr | 556 CGEM_RXDESC_WRAP; 557 sc->rxring_hd_ptr = 0; 558 } else 559 sc->rxring[sc->rxring_hd_ptr++].addr = segs[0].ds_addr; 560 561 sc->rxring_queued++; 562 } 563 } 564 565 /* Pull received packets off of receive descriptor ring. */ 566 static void 567 cgem_recv(struct cgem_softc *sc) 568 { 569 if_t ifp = sc->ifp; 570 struct mbuf *m, *m_hd, **m_tl; 571 uint32_t ctl; 572 573 CGEM_ASSERT_LOCKED(sc); 574 575 /* Pick up all packets in which the OWN bit is set. */ 576 m_hd = NULL; 577 m_tl = &m_hd; 578 while (sc->rxring_queued > 0 && 579 (sc->rxring[sc->rxring_tl_ptr].addr & CGEM_RXDESC_OWN) != 0) { 580 ctl = sc->rxring[sc->rxring_tl_ptr].ctl; 581 582 /* Grab filled mbuf. */ 583 m = sc->rxring_m[sc->rxring_tl_ptr]; 584 sc->rxring_m[sc->rxring_tl_ptr] = NULL; 585 586 /* Sync cache with receive buffer. */ 587 bus_dmamap_sync(sc->mbuf_dma_tag, 588 sc->rxring_m_dmamap[sc->rxring_tl_ptr], 589 BUS_DMASYNC_POSTREAD); 590 591 /* Unload and destroy dmamap. */ 592 bus_dmamap_unload(sc->mbuf_dma_tag, 593 sc->rxring_m_dmamap[sc->rxring_tl_ptr]); 594 bus_dmamap_destroy(sc->mbuf_dma_tag, 595 sc->rxring_m_dmamap[sc->rxring_tl_ptr]); 596 sc->rxring_m_dmamap[sc->rxring_tl_ptr] = NULL; 597 598 /* Increment tail pointer. */ 599 if (++sc->rxring_tl_ptr == CGEM_NUM_RX_DESCS) 600 sc->rxring_tl_ptr = 0; 601 sc->rxring_queued--; 602 603 /* 604 * Check FCS and make sure entire packet landed in one mbuf 605 * cluster (which is much bigger than the largest ethernet 606 * packet). 607 */ 608 if ((ctl & CGEM_RXDESC_BAD_FCS) != 0 || 609 (ctl & (CGEM_RXDESC_SOF | CGEM_RXDESC_EOF)) != 610 (CGEM_RXDESC_SOF | CGEM_RXDESC_EOF)) { 611 /* discard. */ 612 m_free(m); 613 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 614 continue; 615 } 616 617 /* Ready it to hand off to upper layers. */ 618 m->m_data += ETHER_ALIGN; 619 m->m_len = (ctl & CGEM_RXDESC_LENGTH_MASK); 620 m->m_pkthdr.rcvif = ifp; 621 m->m_pkthdr.len = m->m_len; 622 623 /* 624 * Are we using hardware checksumming? Check the status in the 625 * receive descriptor. 626 */ 627 if ((if_getcapenable(ifp) & IFCAP_RXCSUM) != 0) { 628 /* TCP or UDP checks out, IP checks out too. */ 629 if ((ctl & CGEM_RXDESC_CKSUM_STAT_MASK) == 630 CGEM_RXDESC_CKSUM_STAT_TCP_GOOD || 631 (ctl & CGEM_RXDESC_CKSUM_STAT_MASK) == 632 CGEM_RXDESC_CKSUM_STAT_UDP_GOOD) { 633 m->m_pkthdr.csum_flags |= 634 CSUM_IP_CHECKED | CSUM_IP_VALID | 635 CSUM_DATA_VALID | CSUM_PSEUDO_HDR; 636 m->m_pkthdr.csum_data = 0xffff; 637 } else if ((ctl & CGEM_RXDESC_CKSUM_STAT_MASK) == 638 CGEM_RXDESC_CKSUM_STAT_IP_GOOD) { 639 /* Only IP checks out. */ 640 m->m_pkthdr.csum_flags |= 641 CSUM_IP_CHECKED | CSUM_IP_VALID; 642 m->m_pkthdr.csum_data = 0xffff; 643 } 644 } 645 646 /* Queue it up for delivery below. */ 647 *m_tl = m; 648 m_tl = &m->m_next; 649 } 650 651 /* Replenish receive buffers. */ 652 cgem_fill_rqueue(sc); 653 654 /* Unlock and send up packets. */ 655 CGEM_UNLOCK(sc); 656 while (m_hd != NULL) { 657 m = m_hd; 658 m_hd = m_hd->m_next; 659 m->m_next = NULL; 660 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 661 if_input(ifp, m); 662 } 663 CGEM_LOCK(sc); 664 } 665 666 /* Find completed transmits and free their mbufs. */ 667 static void 668 cgem_clean_tx(struct cgem_softc *sc) 669 { 670 struct mbuf *m; 671 uint32_t ctl; 672 673 CGEM_ASSERT_LOCKED(sc); 674 675 /* free up finished transmits. */ 676 while (sc->txring_queued > 0 && 677 ((ctl = sc->txring[sc->txring_tl_ptr].ctl) & 678 CGEM_TXDESC_USED) != 0) { 679 /* Sync cache. */ 680 bus_dmamap_sync(sc->mbuf_dma_tag, 681 sc->txring_m_dmamap[sc->txring_tl_ptr], 682 BUS_DMASYNC_POSTWRITE); 683 684 /* Unload and destroy DMA map. */ 685 bus_dmamap_unload(sc->mbuf_dma_tag, 686 sc->txring_m_dmamap[sc->txring_tl_ptr]); 687 bus_dmamap_destroy(sc->mbuf_dma_tag, 688 sc->txring_m_dmamap[sc->txring_tl_ptr]); 689 sc->txring_m_dmamap[sc->txring_tl_ptr] = NULL; 690 691 /* Free up the mbuf. */ 692 m = sc->txring_m[sc->txring_tl_ptr]; 693 sc->txring_m[sc->txring_tl_ptr] = NULL; 694 m_freem(m); 695 696 /* Check the status. */ 697 if ((ctl & CGEM_TXDESC_AHB_ERR) != 0) { 698 /* Serious bus error. log to console. */ 699 #ifdef CGEM64 700 device_printf(sc->dev, 701 "cgem_clean_tx: AHB error, addr=0x%x%08x\n", 702 sc->txring[sc->txring_tl_ptr].addrhi, 703 sc->txring[sc->txring_tl_ptr].addr); 704 #else 705 device_printf(sc->dev, 706 "cgem_clean_tx: AHB error, addr=0x%x\n", 707 sc->txring[sc->txring_tl_ptr].addr); 708 #endif 709 } else if ((ctl & (CGEM_TXDESC_RETRY_ERR | 710 CGEM_TXDESC_LATE_COLL)) != 0) { 711 if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, 1); 712 } else 713 if_inc_counter(sc->ifp, IFCOUNTER_OPACKETS, 1); 714 715 /* 716 * If the packet spanned more than one tx descriptor, skip 717 * descriptors until we find the end so that only 718 * start-of-frame descriptors are processed. 719 */ 720 while ((ctl & CGEM_TXDESC_LAST_BUF) == 0) { 721 if ((ctl & CGEM_TXDESC_WRAP) != 0) 722 sc->txring_tl_ptr = 0; 723 else 724 sc->txring_tl_ptr++; 725 sc->txring_queued--; 726 727 ctl = sc->txring[sc->txring_tl_ptr].ctl; 728 729 sc->txring[sc->txring_tl_ptr].ctl = 730 ctl | CGEM_TXDESC_USED; 731 } 732 733 /* Next descriptor. */ 734 if ((ctl & CGEM_TXDESC_WRAP) != 0) 735 sc->txring_tl_ptr = 0; 736 else 737 sc->txring_tl_ptr++; 738 sc->txring_queued--; 739 740 if_setdrvflagbits(sc->ifp, 0, IFF_DRV_OACTIVE); 741 } 742 } 743 744 /* Start transmits. */ 745 static void 746 cgem_start_locked(if_t ifp) 747 { 748 struct cgem_softc *sc = (struct cgem_softc *) if_getsoftc(ifp); 749 struct mbuf *m; 750 bus_dma_segment_t segs[TX_MAX_DMA_SEGS]; 751 uint32_t ctl; 752 int i, nsegs, wrap, err; 753 754 CGEM_ASSERT_LOCKED(sc); 755 756 if ((if_getdrvflags(ifp) & IFF_DRV_OACTIVE) != 0) 757 return; 758 759 for (;;) { 760 /* Check that there is room in the descriptor ring. */ 761 if (sc->txring_queued >= 762 CGEM_NUM_TX_DESCS - TX_MAX_DMA_SEGS * 2) { 763 /* Try to make room. */ 764 cgem_clean_tx(sc); 765 766 /* Still no room? */ 767 if (sc->txring_queued >= 768 CGEM_NUM_TX_DESCS - TX_MAX_DMA_SEGS * 2) { 769 if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, 0); 770 sc->txfull++; 771 break; 772 } 773 } 774 775 /* Grab next transmit packet. */ 776 m = if_dequeue(ifp); 777 if (m == NULL) 778 break; 779 780 /* Create and load DMA map. */ 781 if (bus_dmamap_create(sc->mbuf_dma_tag, 0, 782 &sc->txring_m_dmamap[sc->txring_hd_ptr])) { 783 m_freem(m); 784 sc->txdmamapfails++; 785 continue; 786 } 787 err = bus_dmamap_load_mbuf_sg(sc->mbuf_dma_tag, 788 sc->txring_m_dmamap[sc->txring_hd_ptr], m, segs, &nsegs, 789 BUS_DMA_NOWAIT); 790 if (err == EFBIG) { 791 /* Too many segments! defrag and try again. */ 792 struct mbuf *m2 = m_defrag(m, M_NOWAIT); 793 794 if (m2 == NULL) { 795 sc->txdefragfails++; 796 m_freem(m); 797 bus_dmamap_destroy(sc->mbuf_dma_tag, 798 sc->txring_m_dmamap[sc->txring_hd_ptr]); 799 sc->txring_m_dmamap[sc->txring_hd_ptr] = NULL; 800 continue; 801 } 802 m = m2; 803 err = bus_dmamap_load_mbuf_sg(sc->mbuf_dma_tag, 804 sc->txring_m_dmamap[sc->txring_hd_ptr], m, segs, 805 &nsegs, BUS_DMA_NOWAIT); 806 sc->txdefrags++; 807 } 808 if (err) { 809 /* Give up. */ 810 m_freem(m); 811 bus_dmamap_destroy(sc->mbuf_dma_tag, 812 sc->txring_m_dmamap[sc->txring_hd_ptr]); 813 sc->txring_m_dmamap[sc->txring_hd_ptr] = NULL; 814 sc->txdmamapfails++; 815 continue; 816 } 817 sc->txring_m[sc->txring_hd_ptr] = m; 818 819 /* Sync tx buffer with cache. */ 820 bus_dmamap_sync(sc->mbuf_dma_tag, 821 sc->txring_m_dmamap[sc->txring_hd_ptr], 822 BUS_DMASYNC_PREWRITE); 823 824 /* Set wrap flag if next packet might run off end of ring. */ 825 wrap = sc->txring_hd_ptr + nsegs + TX_MAX_DMA_SEGS >= 826 CGEM_NUM_TX_DESCS; 827 828 /* 829 * Fill in the TX descriptors back to front so that USED bit in 830 * first descriptor is cleared last. 831 */ 832 for (i = nsegs - 1; i >= 0; i--) { 833 /* Descriptor address. */ 834 sc->txring[sc->txring_hd_ptr + i].addr = 835 segs[i].ds_addr; 836 #ifdef CGEM64 837 sc->txring[sc->txring_hd_ptr + i].addrhi = 838 segs[i].ds_addr >> 32; 839 #endif 840 /* Descriptor control word. */ 841 ctl = segs[i].ds_len; 842 if (i == nsegs - 1) { 843 ctl |= CGEM_TXDESC_LAST_BUF; 844 if (wrap) 845 ctl |= CGEM_TXDESC_WRAP; 846 } 847 sc->txring[sc->txring_hd_ptr + i].ctl = ctl; 848 849 if (i != 0) 850 sc->txring_m[sc->txring_hd_ptr + i] = NULL; 851 } 852 853 if (wrap) 854 sc->txring_hd_ptr = 0; 855 else 856 sc->txring_hd_ptr += nsegs; 857 sc->txring_queued += nsegs; 858 859 /* Kick the transmitter. */ 860 WR4(sc, CGEM_NET_CTRL, sc->net_ctl_shadow | 861 CGEM_NET_CTRL_START_TX); 862 863 /* If there is a BPF listener, bounce a copy to him. */ 864 ETHER_BPF_MTAP(ifp, m); 865 } 866 } 867 868 static void 869 cgem_start(if_t ifp) 870 { 871 struct cgem_softc *sc = (struct cgem_softc *) if_getsoftc(ifp); 872 873 CGEM_LOCK(sc); 874 cgem_start_locked(ifp); 875 CGEM_UNLOCK(sc); 876 } 877 878 static void 879 cgem_poll_hw_stats(struct cgem_softc *sc) 880 { 881 uint32_t n; 882 883 CGEM_ASSERT_LOCKED(sc); 884 885 sc->stats.tx_bytes += RD4(sc, CGEM_OCTETS_TX_BOT); 886 sc->stats.tx_bytes += (uint64_t)RD4(sc, CGEM_OCTETS_TX_TOP) << 32; 887 888 sc->stats.tx_frames += RD4(sc, CGEM_FRAMES_TX); 889 sc->stats.tx_frames_bcast += RD4(sc, CGEM_BCAST_FRAMES_TX); 890 sc->stats.tx_frames_multi += RD4(sc, CGEM_MULTI_FRAMES_TX); 891 sc->stats.tx_frames_pause += RD4(sc, CGEM_PAUSE_FRAMES_TX); 892 sc->stats.tx_frames_64b += RD4(sc, CGEM_FRAMES_64B_TX); 893 sc->stats.tx_frames_65to127b += RD4(sc, CGEM_FRAMES_65_127B_TX); 894 sc->stats.tx_frames_128to255b += RD4(sc, CGEM_FRAMES_128_255B_TX); 895 sc->stats.tx_frames_256to511b += RD4(sc, CGEM_FRAMES_256_511B_TX); 896 sc->stats.tx_frames_512to1023b += RD4(sc, CGEM_FRAMES_512_1023B_TX); 897 sc->stats.tx_frames_1024to1536b += RD4(sc, CGEM_FRAMES_1024_1518B_TX); 898 sc->stats.tx_under_runs += RD4(sc, CGEM_TX_UNDERRUNS); 899 900 n = RD4(sc, CGEM_SINGLE_COLL_FRAMES); 901 sc->stats.tx_single_collisn += n; 902 if_inc_counter(sc->ifp, IFCOUNTER_COLLISIONS, n); 903 n = RD4(sc, CGEM_MULTI_COLL_FRAMES); 904 sc->stats.tx_multi_collisn += n; 905 if_inc_counter(sc->ifp, IFCOUNTER_COLLISIONS, n); 906 n = RD4(sc, CGEM_EXCESSIVE_COLL_FRAMES); 907 sc->stats.tx_excsv_collisn += n; 908 if_inc_counter(sc->ifp, IFCOUNTER_COLLISIONS, n); 909 n = RD4(sc, CGEM_LATE_COLL); 910 sc->stats.tx_late_collisn += n; 911 if_inc_counter(sc->ifp, IFCOUNTER_COLLISIONS, n); 912 913 sc->stats.tx_deferred_frames += RD4(sc, CGEM_DEFERRED_TX_FRAMES); 914 sc->stats.tx_carrier_sense_errs += RD4(sc, CGEM_CARRIER_SENSE_ERRS); 915 916 sc->stats.rx_bytes += RD4(sc, CGEM_OCTETS_RX_BOT); 917 sc->stats.rx_bytes += (uint64_t)RD4(sc, CGEM_OCTETS_RX_TOP) << 32; 918 919 sc->stats.rx_frames += RD4(sc, CGEM_FRAMES_RX); 920 sc->stats.rx_frames_bcast += RD4(sc, CGEM_BCAST_FRAMES_RX); 921 sc->stats.rx_frames_multi += RD4(sc, CGEM_MULTI_FRAMES_RX); 922 sc->stats.rx_frames_pause += RD4(sc, CGEM_PAUSE_FRAMES_RX); 923 sc->stats.rx_frames_64b += RD4(sc, CGEM_FRAMES_64B_RX); 924 sc->stats.rx_frames_65to127b += RD4(sc, CGEM_FRAMES_65_127B_RX); 925 sc->stats.rx_frames_128to255b += RD4(sc, CGEM_FRAMES_128_255B_RX); 926 sc->stats.rx_frames_256to511b += RD4(sc, CGEM_FRAMES_256_511B_RX); 927 sc->stats.rx_frames_512to1023b += RD4(sc, CGEM_FRAMES_512_1023B_RX); 928 sc->stats.rx_frames_1024to1536b += RD4(sc, CGEM_FRAMES_1024_1518B_RX); 929 sc->stats.rx_frames_undersize += RD4(sc, CGEM_UNDERSZ_RX); 930 sc->stats.rx_frames_oversize += RD4(sc, CGEM_OVERSZ_RX); 931 sc->stats.rx_frames_jabber += RD4(sc, CGEM_JABBERS_RX); 932 sc->stats.rx_frames_fcs_errs += RD4(sc, CGEM_FCS_ERRS); 933 sc->stats.rx_frames_length_errs += RD4(sc, CGEM_LENGTH_FIELD_ERRS); 934 sc->stats.rx_symbol_errs += RD4(sc, CGEM_RX_SYMBOL_ERRS); 935 sc->stats.rx_align_errs += RD4(sc, CGEM_ALIGN_ERRS); 936 sc->stats.rx_resource_errs += RD4(sc, CGEM_RX_RESOURCE_ERRS); 937 sc->stats.rx_overrun_errs += RD4(sc, CGEM_RX_OVERRUN_ERRS); 938 sc->stats.rx_ip_hdr_csum_errs += RD4(sc, CGEM_IP_HDR_CKSUM_ERRS); 939 sc->stats.rx_tcp_csum_errs += RD4(sc, CGEM_TCP_CKSUM_ERRS); 940 sc->stats.rx_udp_csum_errs += RD4(sc, CGEM_UDP_CKSUM_ERRS); 941 } 942 943 static void 944 cgem_tick(void *arg) 945 { 946 struct cgem_softc *sc = (struct cgem_softc *)arg; 947 struct mii_data *mii; 948 949 CGEM_ASSERT_LOCKED(sc); 950 951 /* Poll the phy. */ 952 if (sc->miibus != NULL) { 953 mii = device_get_softc(sc->miibus); 954 mii_tick(mii); 955 } 956 957 /* Poll statistics registers. */ 958 cgem_poll_hw_stats(sc); 959 960 /* Check for receiver hang. */ 961 if (sc->rxhangwar && sc->rx_frames_prev == sc->stats.rx_frames) { 962 /* 963 * Reset receiver logic by toggling RX_EN bit. 1usec 964 * delay is necessary especially when operating at 100mbps 965 * and 10mbps speeds. 966 */ 967 WR4(sc, CGEM_NET_CTRL, sc->net_ctl_shadow & 968 ~CGEM_NET_CTRL_RX_EN); 969 DELAY(1); 970 WR4(sc, CGEM_NET_CTRL, sc->net_ctl_shadow); 971 } 972 sc->rx_frames_prev = sc->stats.rx_frames; 973 974 /* Next callout in one second. */ 975 callout_reset(&sc->tick_ch, hz, cgem_tick, sc); 976 } 977 978 /* Interrupt handler. */ 979 static void 980 cgem_intr(void *arg) 981 { 982 struct cgem_softc *sc = (struct cgem_softc *)arg; 983 if_t ifp = sc->ifp; 984 uint32_t istatus; 985 986 CGEM_LOCK(sc); 987 988 if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0) { 989 CGEM_UNLOCK(sc); 990 return; 991 } 992 993 /* Read interrupt status and immediately clear the bits. */ 994 istatus = RD4(sc, CGEM_INTR_STAT); 995 WR4(sc, CGEM_INTR_STAT, istatus); 996 997 /* Packets received. */ 998 if ((istatus & CGEM_INTR_RX_COMPLETE) != 0) 999 cgem_recv(sc); 1000 1001 /* Free up any completed transmit buffers. */ 1002 cgem_clean_tx(sc); 1003 1004 /* Hresp not ok. Something is very bad with DMA. Try to clear. */ 1005 if ((istatus & CGEM_INTR_HRESP_NOT_OK) != 0) { 1006 device_printf(sc->dev, 1007 "cgem_intr: hresp not okay! rx_status=0x%x\n", 1008 RD4(sc, CGEM_RX_STAT)); 1009 WR4(sc, CGEM_RX_STAT, CGEM_RX_STAT_HRESP_NOT_OK); 1010 } 1011 1012 /* Receiver overrun. */ 1013 if ((istatus & CGEM_INTR_RX_OVERRUN) != 0) { 1014 /* Clear status bit. */ 1015 WR4(sc, CGEM_RX_STAT, CGEM_RX_STAT_OVERRUN); 1016 sc->rxoverruns++; 1017 } 1018 1019 /* Receiver ran out of bufs. */ 1020 if ((istatus & CGEM_INTR_RX_USED_READ) != 0) { 1021 WR4(sc, CGEM_NET_CTRL, sc->net_ctl_shadow | 1022 CGEM_NET_CTRL_FLUSH_DPRAM_PKT); 1023 cgem_fill_rqueue(sc); 1024 sc->rxnobufs++; 1025 } 1026 1027 /* Restart transmitter if needed. */ 1028 if (!if_sendq_empty(ifp)) 1029 cgem_start_locked(ifp); 1030 1031 CGEM_UNLOCK(sc); 1032 } 1033 1034 /* Reset hardware. */ 1035 static void 1036 cgem_reset(struct cgem_softc *sc) 1037 { 1038 1039 CGEM_ASSERT_LOCKED(sc); 1040 1041 /* Determine data bus width from design configuration register. */ 1042 switch (RD4(sc, CGEM_DESIGN_CFG1) & 1043 CGEM_DESIGN_CFG1_DMA_BUS_WIDTH_MASK) { 1044 case CGEM_DESIGN_CFG1_DMA_BUS_WIDTH_64: 1045 sc->net_cfg_shadow = CGEM_NET_CFG_DBUS_WIDTH_64; 1046 break; 1047 case CGEM_DESIGN_CFG1_DMA_BUS_WIDTH_128: 1048 sc->net_cfg_shadow = CGEM_NET_CFG_DBUS_WIDTH_128; 1049 break; 1050 default: 1051 sc->net_cfg_shadow = CGEM_NET_CFG_DBUS_WIDTH_32; 1052 } 1053 1054 WR4(sc, CGEM_NET_CTRL, 0); 1055 WR4(sc, CGEM_NET_CFG, sc->net_cfg_shadow); 1056 WR4(sc, CGEM_NET_CTRL, CGEM_NET_CTRL_CLR_STAT_REGS); 1057 WR4(sc, CGEM_TX_STAT, CGEM_TX_STAT_ALL); 1058 WR4(sc, CGEM_RX_STAT, CGEM_RX_STAT_ALL); 1059 WR4(sc, CGEM_INTR_DIS, CGEM_INTR_ALL); 1060 WR4(sc, CGEM_HASH_BOT, 0); 1061 WR4(sc, CGEM_HASH_TOP, 0); 1062 WR4(sc, CGEM_TX_QBAR, 0); /* manual says do this. */ 1063 WR4(sc, CGEM_RX_QBAR, 0); 1064 1065 /* Get management port running even if interface is down. */ 1066 sc->net_cfg_shadow |= CGEM_NET_CFG_MDC_CLK_DIV_48; 1067 WR4(sc, CGEM_NET_CFG, sc->net_cfg_shadow); 1068 1069 sc->net_ctl_shadow = CGEM_NET_CTRL_MGMT_PORT_EN; 1070 WR4(sc, CGEM_NET_CTRL, sc->net_ctl_shadow); 1071 } 1072 1073 /* Bring up the hardware. */ 1074 static void 1075 cgem_config(struct cgem_softc *sc) 1076 { 1077 if_t ifp = sc->ifp; 1078 uint32_t dma_cfg; 1079 u_char *eaddr = if_getlladdr(ifp); 1080 1081 CGEM_ASSERT_LOCKED(sc); 1082 1083 /* Program Net Config Register. */ 1084 sc->net_cfg_shadow &= (CGEM_NET_CFG_MDC_CLK_DIV_MASK | 1085 CGEM_NET_CFG_DBUS_WIDTH_MASK); 1086 sc->net_cfg_shadow |= (CGEM_NET_CFG_FCS_REMOVE | 1087 CGEM_NET_CFG_RX_BUF_OFFSET(ETHER_ALIGN) | 1088 CGEM_NET_CFG_GIGE_EN | CGEM_NET_CFG_1536RXEN | 1089 CGEM_NET_CFG_FULL_DUPLEX | CGEM_NET_CFG_SPEED100); 1090 1091 /* Check connection type, enable SGMII bits if necessary. */ 1092 if (sc->phy_contype == MII_CONTYPE_SGMII) { 1093 sc->net_cfg_shadow |= CGEM_NET_CFG_SGMII_EN; 1094 sc->net_cfg_shadow |= CGEM_NET_CFG_PCS_SEL; 1095 } 1096 1097 /* Enable receive checksum offloading? */ 1098 if ((if_getcapenable(ifp) & IFCAP_RXCSUM) != 0) 1099 sc->net_cfg_shadow |= CGEM_NET_CFG_RX_CHKSUM_OFFLD_EN; 1100 1101 WR4(sc, CGEM_NET_CFG, sc->net_cfg_shadow); 1102 1103 /* Program DMA Config Register. */ 1104 dma_cfg = CGEM_DMA_CFG_RX_BUF_SIZE(MCLBYTES) | 1105 CGEM_DMA_CFG_RX_PKTBUF_MEMSZ_SEL_8K | 1106 CGEM_DMA_CFG_TX_PKTBUF_MEMSZ_SEL | 1107 CGEM_DMA_CFG_AHB_FIXED_BURST_LEN_16 | 1108 #ifdef CGEM64 1109 CGEM_DMA_CFG_ADDR_BUS_64 | 1110 #endif 1111 CGEM_DMA_CFG_DISC_WHEN_NO_AHB; 1112 1113 /* Enable transmit checksum offloading? */ 1114 if ((if_getcapenable(ifp) & IFCAP_TXCSUM) != 0) 1115 dma_cfg |= CGEM_DMA_CFG_CHKSUM_GEN_OFFLOAD_EN; 1116 1117 WR4(sc, CGEM_DMA_CFG, dma_cfg); 1118 1119 /* Write the rx and tx descriptor ring addresses to the QBAR regs. */ 1120 WR4(sc, CGEM_RX_QBAR, (uint32_t)sc->rxring_physaddr); 1121 WR4(sc, CGEM_TX_QBAR, (uint32_t)sc->txring_physaddr); 1122 #ifdef CGEM64 1123 WR4(sc, CGEM_RX_QBAR_HI, (uint32_t)(sc->rxring_physaddr >> 32)); 1124 WR4(sc, CGEM_TX_QBAR_HI, (uint32_t)(sc->txring_physaddr >> 32)); 1125 #endif 1126 1127 /* Enable rx and tx. */ 1128 sc->net_ctl_shadow |= (CGEM_NET_CTRL_TX_EN | CGEM_NET_CTRL_RX_EN); 1129 WR4(sc, CGEM_NET_CTRL, sc->net_ctl_shadow); 1130 1131 /* Set receive address in case it changed. */ 1132 WR4(sc, CGEM_SPEC_ADDR_LOW(0), (eaddr[3] << 24) | 1133 (eaddr[2] << 16) | (eaddr[1] << 8) | eaddr[0]); 1134 WR4(sc, CGEM_SPEC_ADDR_HI(0), (eaddr[5] << 8) | eaddr[4]); 1135 1136 /* Set up interrupts. */ 1137 WR4(sc, CGEM_INTR_EN, CGEM_INTR_RX_COMPLETE | CGEM_INTR_RX_OVERRUN | 1138 CGEM_INTR_TX_USED_READ | CGEM_INTR_RX_USED_READ | 1139 CGEM_INTR_HRESP_NOT_OK); 1140 } 1141 1142 /* Turn on interface and load up receive ring with buffers. */ 1143 static void 1144 cgem_init_locked(struct cgem_softc *sc) 1145 { 1146 struct mii_data *mii; 1147 1148 CGEM_ASSERT_LOCKED(sc); 1149 1150 if ((if_getdrvflags(sc->ifp) & IFF_DRV_RUNNING) != 0) 1151 return; 1152 1153 cgem_config(sc); 1154 cgem_fill_rqueue(sc); 1155 1156 if_setdrvflagbits(sc->ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE); 1157 1158 if (sc->miibus != NULL) { 1159 mii = device_get_softc(sc->miibus); 1160 mii_mediachg(mii); 1161 } 1162 1163 callout_reset(&sc->tick_ch, hz, cgem_tick, sc); 1164 } 1165 1166 static void 1167 cgem_init(void *arg) 1168 { 1169 struct cgem_softc *sc = (struct cgem_softc *)arg; 1170 1171 CGEM_LOCK(sc); 1172 cgem_init_locked(sc); 1173 CGEM_UNLOCK(sc); 1174 } 1175 1176 /* Turn off interface. Free up any buffers in transmit or receive queues. */ 1177 static void 1178 cgem_stop(struct cgem_softc *sc) 1179 { 1180 int i; 1181 1182 CGEM_ASSERT_LOCKED(sc); 1183 1184 callout_stop(&sc->tick_ch); 1185 1186 /* Shut down hardware. */ 1187 cgem_reset(sc); 1188 1189 /* Clear out transmit queue. */ 1190 memset(sc->txring, 0, CGEM_NUM_TX_DESCS * sizeof(struct cgem_tx_desc)); 1191 for (i = 0; i < CGEM_NUM_TX_DESCS; i++) { 1192 sc->txring[i].ctl = CGEM_TXDESC_USED; 1193 if (sc->txring_m[i]) { 1194 /* Unload and destroy dmamap. */ 1195 bus_dmamap_unload(sc->mbuf_dma_tag, 1196 sc->txring_m_dmamap[i]); 1197 bus_dmamap_destroy(sc->mbuf_dma_tag, 1198 sc->txring_m_dmamap[i]); 1199 sc->txring_m_dmamap[i] = NULL; 1200 m_freem(sc->txring_m[i]); 1201 sc->txring_m[i] = NULL; 1202 } 1203 } 1204 sc->txring[CGEM_NUM_TX_DESCS - 1].ctl |= CGEM_TXDESC_WRAP; 1205 1206 sc->txring_hd_ptr = 0; 1207 sc->txring_tl_ptr = 0; 1208 sc->txring_queued = 0; 1209 1210 /* Clear out receive queue. */ 1211 memset(sc->rxring, 0, CGEM_NUM_RX_DESCS * sizeof(struct cgem_rx_desc)); 1212 for (i = 0; i < CGEM_NUM_RX_DESCS; i++) { 1213 sc->rxring[i].addr = CGEM_RXDESC_OWN; 1214 if (sc->rxring_m[i]) { 1215 /* Unload and destroy dmamap. */ 1216 bus_dmamap_unload(sc->mbuf_dma_tag, 1217 sc->rxring_m_dmamap[i]); 1218 bus_dmamap_destroy(sc->mbuf_dma_tag, 1219 sc->rxring_m_dmamap[i]); 1220 sc->rxring_m_dmamap[i] = NULL; 1221 1222 m_freem(sc->rxring_m[i]); 1223 sc->rxring_m[i] = NULL; 1224 } 1225 } 1226 sc->rxring[CGEM_NUM_RX_DESCS - 1].addr |= CGEM_RXDESC_WRAP; 1227 1228 sc->rxring_hd_ptr = 0; 1229 sc->rxring_tl_ptr = 0; 1230 sc->rxring_queued = 0; 1231 1232 /* Force next statchg or linkchg to program net config register. */ 1233 sc->mii_media_active = 0; 1234 } 1235 1236 static int 1237 cgem_ioctl(if_t ifp, u_long cmd, caddr_t data) 1238 { 1239 struct cgem_softc *sc = if_getsoftc(ifp); 1240 struct ifreq *ifr = (struct ifreq *)data; 1241 struct mii_data *mii; 1242 int error = 0, mask; 1243 1244 switch (cmd) { 1245 case SIOCSIFFLAGS: 1246 CGEM_LOCK(sc); 1247 if ((if_getflags(ifp) & IFF_UP) != 0) { 1248 if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0) { 1249 if (((if_getflags(ifp) ^ sc->if_old_flags) & 1250 (IFF_PROMISC | IFF_ALLMULTI)) != 0) { 1251 cgem_rx_filter(sc); 1252 } 1253 } else { 1254 cgem_init_locked(sc); 1255 } 1256 } else if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0) { 1257 if_setdrvflagbits(ifp, 0, IFF_DRV_RUNNING); 1258 cgem_stop(sc); 1259 } 1260 sc->if_old_flags = if_getflags(ifp); 1261 CGEM_UNLOCK(sc); 1262 break; 1263 1264 case SIOCADDMULTI: 1265 case SIOCDELMULTI: 1266 /* Set up multi-cast filters. */ 1267 if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0) { 1268 CGEM_LOCK(sc); 1269 cgem_rx_filter(sc); 1270 CGEM_UNLOCK(sc); 1271 } 1272 break; 1273 1274 case SIOCSIFMEDIA: 1275 case SIOCGIFMEDIA: 1276 if (sc->miibus == NULL) 1277 return (ENXIO); 1278 mii = device_get_softc(sc->miibus); 1279 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, cmd); 1280 break; 1281 1282 case SIOCSIFCAP: 1283 CGEM_LOCK(sc); 1284 mask = if_getcapenable(ifp) ^ ifr->ifr_reqcap; 1285 1286 if ((mask & IFCAP_TXCSUM) != 0) { 1287 if ((ifr->ifr_reqcap & IFCAP_TXCSUM) != 0) { 1288 /* Turn on TX checksumming. */ 1289 if_setcapenablebit(ifp, IFCAP_TXCSUM | 1290 IFCAP_TXCSUM_IPV6, 0); 1291 if_sethwassistbits(ifp, CGEM_CKSUM_ASSIST, 0); 1292 1293 WR4(sc, CGEM_DMA_CFG, 1294 RD4(sc, CGEM_DMA_CFG) | 1295 CGEM_DMA_CFG_CHKSUM_GEN_OFFLOAD_EN); 1296 } else { 1297 /* Turn off TX checksumming. */ 1298 if_setcapenablebit(ifp, 0, IFCAP_TXCSUM | 1299 IFCAP_TXCSUM_IPV6); 1300 if_sethwassistbits(ifp, 0, CGEM_CKSUM_ASSIST); 1301 1302 WR4(sc, CGEM_DMA_CFG, 1303 RD4(sc, CGEM_DMA_CFG) & 1304 ~CGEM_DMA_CFG_CHKSUM_GEN_OFFLOAD_EN); 1305 } 1306 } 1307 if ((mask & IFCAP_RXCSUM) != 0) { 1308 if ((ifr->ifr_reqcap & IFCAP_RXCSUM) != 0) { 1309 /* Turn on RX checksumming. */ 1310 if_setcapenablebit(ifp, IFCAP_RXCSUM | 1311 IFCAP_RXCSUM_IPV6, 0); 1312 sc->net_cfg_shadow |= 1313 CGEM_NET_CFG_RX_CHKSUM_OFFLD_EN; 1314 WR4(sc, CGEM_NET_CFG, sc->net_cfg_shadow); 1315 } else { 1316 /* Turn off RX checksumming. */ 1317 if_setcapenablebit(ifp, 0, IFCAP_RXCSUM | 1318 IFCAP_RXCSUM_IPV6); 1319 sc->net_cfg_shadow &= 1320 ~CGEM_NET_CFG_RX_CHKSUM_OFFLD_EN; 1321 WR4(sc, CGEM_NET_CFG, sc->net_cfg_shadow); 1322 } 1323 } 1324 if ((if_getcapenable(ifp) & (IFCAP_RXCSUM | IFCAP_TXCSUM)) == 1325 (IFCAP_RXCSUM | IFCAP_TXCSUM)) 1326 if_setcapenablebit(ifp, IFCAP_VLAN_HWCSUM, 0); 1327 else 1328 if_setcapenablebit(ifp, 0, IFCAP_VLAN_HWCSUM); 1329 1330 CGEM_UNLOCK(sc); 1331 break; 1332 default: 1333 error = ether_ioctl(ifp, cmd, data); 1334 break; 1335 } 1336 1337 return (error); 1338 } 1339 1340 /* MII bus support routines. 1341 */ 1342 static int 1343 cgem_ifmedia_upd(if_t ifp) 1344 { 1345 struct cgem_softc *sc = (struct cgem_softc *) if_getsoftc(ifp); 1346 struct mii_data *mii; 1347 struct mii_softc *miisc; 1348 int error = 0; 1349 1350 mii = device_get_softc(sc->miibus); 1351 CGEM_LOCK(sc); 1352 if ((if_getflags(ifp) & IFF_UP) != 0) { 1353 LIST_FOREACH(miisc, &mii->mii_phys, mii_list) 1354 PHY_RESET(miisc); 1355 error = mii_mediachg(mii); 1356 } 1357 CGEM_UNLOCK(sc); 1358 1359 return (error); 1360 } 1361 1362 static void 1363 cgem_ifmedia_sts(if_t ifp, struct ifmediareq *ifmr) 1364 { 1365 struct cgem_softc *sc = (struct cgem_softc *) if_getsoftc(ifp); 1366 struct mii_data *mii; 1367 1368 mii = device_get_softc(sc->miibus); 1369 CGEM_LOCK(sc); 1370 mii_pollstat(mii); 1371 ifmr->ifm_active = mii->mii_media_active; 1372 ifmr->ifm_status = mii->mii_media_status; 1373 CGEM_UNLOCK(sc); 1374 } 1375 1376 static int 1377 cgem_miibus_readreg(device_t dev, int phy, int reg) 1378 { 1379 struct cgem_softc *sc = device_get_softc(dev); 1380 int tries, val; 1381 1382 WR4(sc, CGEM_PHY_MAINT, CGEM_PHY_MAINT_CLAUSE_22 | 1383 CGEM_PHY_MAINT_MUST_10 | CGEM_PHY_MAINT_OP_READ | 1384 (phy << CGEM_PHY_MAINT_PHY_ADDR_SHIFT) | 1385 (reg << CGEM_PHY_MAINT_REG_ADDR_SHIFT)); 1386 1387 /* Wait for completion. */ 1388 tries=0; 1389 while ((RD4(sc, CGEM_NET_STAT) & CGEM_NET_STAT_PHY_MGMT_IDLE) == 0) { 1390 DELAY(5); 1391 if (++tries > 200) { 1392 device_printf(dev, "phy read timeout: %d\n", reg); 1393 return (-1); 1394 } 1395 } 1396 1397 val = RD4(sc, CGEM_PHY_MAINT) & CGEM_PHY_MAINT_DATA_MASK; 1398 1399 if (reg == MII_EXTSR) 1400 /* 1401 * MAC does not support half-duplex at gig speeds. 1402 * Let mii(4) exclude the capability. 1403 */ 1404 val &= ~(EXTSR_1000XHDX | EXTSR_1000THDX); 1405 1406 return (val); 1407 } 1408 1409 static int 1410 cgem_miibus_writereg(device_t dev, int phy, int reg, int data) 1411 { 1412 struct cgem_softc *sc = device_get_softc(dev); 1413 int tries; 1414 1415 WR4(sc, CGEM_PHY_MAINT, CGEM_PHY_MAINT_CLAUSE_22 | 1416 CGEM_PHY_MAINT_MUST_10 | CGEM_PHY_MAINT_OP_WRITE | 1417 (phy << CGEM_PHY_MAINT_PHY_ADDR_SHIFT) | 1418 (reg << CGEM_PHY_MAINT_REG_ADDR_SHIFT) | 1419 (data & CGEM_PHY_MAINT_DATA_MASK)); 1420 1421 /* Wait for completion. */ 1422 tries = 0; 1423 while ((RD4(sc, CGEM_NET_STAT) & CGEM_NET_STAT_PHY_MGMT_IDLE) == 0) { 1424 DELAY(5); 1425 if (++tries > 200) { 1426 device_printf(dev, "phy write timeout: %d\n", reg); 1427 return (-1); 1428 } 1429 } 1430 1431 return (0); 1432 } 1433 1434 static void 1435 cgem_miibus_statchg(device_t dev) 1436 { 1437 struct cgem_softc *sc = device_get_softc(dev); 1438 struct mii_data *mii = device_get_softc(sc->miibus); 1439 1440 CGEM_ASSERT_LOCKED(sc); 1441 1442 if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) == 1443 (IFM_ACTIVE | IFM_AVALID) && 1444 sc->mii_media_active != mii->mii_media_active) 1445 cgem_mediachange(sc, mii); 1446 } 1447 1448 static void 1449 cgem_miibus_linkchg(device_t dev) 1450 { 1451 struct cgem_softc *sc = device_get_softc(dev); 1452 struct mii_data *mii = device_get_softc(sc->miibus); 1453 1454 CGEM_ASSERT_LOCKED(sc); 1455 1456 if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) == 1457 (IFM_ACTIVE | IFM_AVALID) && 1458 sc->mii_media_active != mii->mii_media_active) 1459 cgem_mediachange(sc, mii); 1460 } 1461 1462 /* 1463 * Overridable weak symbol cgem_set_ref_clk(). This allows platforms to 1464 * provide a function to set the cgem's reference clock. 1465 */ 1466 static int __used 1467 cgem_default_set_ref_clk(int unit, int frequency) 1468 { 1469 1470 return 0; 1471 } 1472 __weak_reference(cgem_default_set_ref_clk, cgem_set_ref_clk); 1473 1474 /* Call to set reference clock and network config bits according to media. */ 1475 static void 1476 cgem_mediachange(struct cgem_softc *sc, struct mii_data *mii) 1477 { 1478 int ref_clk_freq; 1479 1480 CGEM_ASSERT_LOCKED(sc); 1481 1482 /* Update hardware to reflect media. */ 1483 sc->net_cfg_shadow &= ~(CGEM_NET_CFG_SPEED100 | CGEM_NET_CFG_GIGE_EN | 1484 CGEM_NET_CFG_FULL_DUPLEX); 1485 1486 switch (IFM_SUBTYPE(mii->mii_media_active)) { 1487 case IFM_1000_T: 1488 sc->net_cfg_shadow |= (CGEM_NET_CFG_SPEED100 | 1489 CGEM_NET_CFG_GIGE_EN); 1490 ref_clk_freq = 125000000; 1491 break; 1492 case IFM_100_TX: 1493 sc->net_cfg_shadow |= CGEM_NET_CFG_SPEED100; 1494 ref_clk_freq = 25000000; 1495 break; 1496 default: 1497 ref_clk_freq = 2500000; 1498 } 1499 1500 if ((mii->mii_media_active & IFM_FDX) != 0) 1501 sc->net_cfg_shadow |= CGEM_NET_CFG_FULL_DUPLEX; 1502 1503 WR4(sc, CGEM_NET_CFG, sc->net_cfg_shadow); 1504 1505 if (sc->ref_clk != NULL) { 1506 CGEM_UNLOCK(sc); 1507 if (clk_set_freq(sc->ref_clk, ref_clk_freq, 0)) 1508 device_printf(sc->dev, "could not set ref clk to %d\n", 1509 ref_clk_freq); 1510 CGEM_LOCK(sc); 1511 } 1512 1513 sc->mii_media_active = mii->mii_media_active; 1514 } 1515 1516 static void 1517 cgem_add_sysctls(device_t dev) 1518 { 1519 struct cgem_softc *sc = device_get_softc(dev); 1520 struct sysctl_ctx_list *ctx; 1521 struct sysctl_oid_list *child; 1522 struct sysctl_oid *tree; 1523 1524 ctx = device_get_sysctl_ctx(dev); 1525 child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev)); 1526 1527 SYSCTL_ADD_INT(ctx, child, OID_AUTO, "rxbufs", CTLFLAG_RW, 1528 &sc->rxbufs, 0, "Number receive buffers to provide"); 1529 1530 SYSCTL_ADD_INT(ctx, child, OID_AUTO, "rxhangwar", CTLFLAG_RW, 1531 &sc->rxhangwar, 0, "Enable receive hang work-around"); 1532 1533 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "_rxoverruns", CTLFLAG_RD, 1534 &sc->rxoverruns, 0, "Receive overrun events"); 1535 1536 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "_rxnobufs", CTLFLAG_RD, 1537 &sc->rxnobufs, 0, "Receive buf queue empty events"); 1538 1539 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "_rxdmamapfails", CTLFLAG_RD, 1540 &sc->rxdmamapfails, 0, "Receive DMA map failures"); 1541 1542 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "_txfull", CTLFLAG_RD, 1543 &sc->txfull, 0, "Transmit ring full events"); 1544 1545 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "_txdmamapfails", CTLFLAG_RD, 1546 &sc->txdmamapfails, 0, "Transmit DMA map failures"); 1547 1548 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "_txdefrags", CTLFLAG_RD, 1549 &sc->txdefrags, 0, "Transmit m_defrag() calls"); 1550 1551 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "_txdefragfails", CTLFLAG_RD, 1552 &sc->txdefragfails, 0, "Transmit m_defrag() failures"); 1553 1554 tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "stats", 1555 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "GEM statistics"); 1556 child = SYSCTL_CHILDREN(tree); 1557 1558 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_bytes", CTLFLAG_RD, 1559 &sc->stats.tx_bytes, "Total bytes transmitted"); 1560 1561 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_frames", CTLFLAG_RD, 1562 &sc->stats.tx_frames, 0, "Total frames transmitted"); 1563 1564 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_frames_bcast", CTLFLAG_RD, 1565 &sc->stats.tx_frames_bcast, 0, 1566 "Number broadcast frames transmitted"); 1567 1568 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_frames_multi", CTLFLAG_RD, 1569 &sc->stats.tx_frames_multi, 0, 1570 "Number multicast frames transmitted"); 1571 1572 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_frames_pause", 1573 CTLFLAG_RD, &sc->stats.tx_frames_pause, 0, 1574 "Number pause frames transmitted"); 1575 1576 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_frames_64b", CTLFLAG_RD, 1577 &sc->stats.tx_frames_64b, 0, 1578 "Number frames transmitted of size 64 bytes or less"); 1579 1580 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_frames_65to127b", CTLFLAG_RD, 1581 &sc->stats.tx_frames_65to127b, 0, 1582 "Number frames transmitted of size 65-127 bytes"); 1583 1584 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_frames_128to255b", 1585 CTLFLAG_RD, &sc->stats.tx_frames_128to255b, 0, 1586 "Number frames transmitted of size 128-255 bytes"); 1587 1588 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_frames_256to511b", 1589 CTLFLAG_RD, &sc->stats.tx_frames_256to511b, 0, 1590 "Number frames transmitted of size 256-511 bytes"); 1591 1592 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_frames_512to1023b", 1593 CTLFLAG_RD, &sc->stats.tx_frames_512to1023b, 0, 1594 "Number frames transmitted of size 512-1023 bytes"); 1595 1596 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_frames_1024to1536b", 1597 CTLFLAG_RD, &sc->stats.tx_frames_1024to1536b, 0, 1598 "Number frames transmitted of size 1024-1536 bytes"); 1599 1600 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_under_runs", 1601 CTLFLAG_RD, &sc->stats.tx_under_runs, 0, 1602 "Number transmit under-run events"); 1603 1604 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_single_collisn", 1605 CTLFLAG_RD, &sc->stats.tx_single_collisn, 0, 1606 "Number single-collision transmit frames"); 1607 1608 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_multi_collisn", 1609 CTLFLAG_RD, &sc->stats.tx_multi_collisn, 0, 1610 "Number multi-collision transmit frames"); 1611 1612 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_excsv_collisn", 1613 CTLFLAG_RD, &sc->stats.tx_excsv_collisn, 0, 1614 "Number excessive collision transmit frames"); 1615 1616 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_late_collisn", 1617 CTLFLAG_RD, &sc->stats.tx_late_collisn, 0, 1618 "Number late-collision transmit frames"); 1619 1620 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_deferred_frames", 1621 CTLFLAG_RD, &sc->stats.tx_deferred_frames, 0, 1622 "Number deferred transmit frames"); 1623 1624 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "tx_carrier_sense_errs", 1625 CTLFLAG_RD, &sc->stats.tx_carrier_sense_errs, 0, 1626 "Number carrier sense errors on transmit"); 1627 1628 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_bytes", CTLFLAG_RD, 1629 &sc->stats.rx_bytes, "Total bytes received"); 1630 1631 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames", CTLFLAG_RD, 1632 &sc->stats.rx_frames, 0, "Total frames received"); 1633 1634 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_bcast", 1635 CTLFLAG_RD, &sc->stats.rx_frames_bcast, 0, 1636 "Number broadcast frames received"); 1637 1638 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_multi", 1639 CTLFLAG_RD, &sc->stats.rx_frames_multi, 0, 1640 "Number multicast frames received"); 1641 1642 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_pause", 1643 CTLFLAG_RD, &sc->stats.rx_frames_pause, 0, 1644 "Number pause frames received"); 1645 1646 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_64b", 1647 CTLFLAG_RD, &sc->stats.rx_frames_64b, 0, 1648 "Number frames received of size 64 bytes or less"); 1649 1650 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_65to127b", 1651 CTLFLAG_RD, &sc->stats.rx_frames_65to127b, 0, 1652 "Number frames received of size 65-127 bytes"); 1653 1654 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_128to255b", 1655 CTLFLAG_RD, &sc->stats.rx_frames_128to255b, 0, 1656 "Number frames received of size 128-255 bytes"); 1657 1658 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_256to511b", 1659 CTLFLAG_RD, &sc->stats.rx_frames_256to511b, 0, 1660 "Number frames received of size 256-511 bytes"); 1661 1662 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_512to1023b", 1663 CTLFLAG_RD, &sc->stats.rx_frames_512to1023b, 0, 1664 "Number frames received of size 512-1023 bytes"); 1665 1666 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_1024to1536b", 1667 CTLFLAG_RD, &sc->stats.rx_frames_1024to1536b, 0, 1668 "Number frames received of size 1024-1536 bytes"); 1669 1670 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_undersize", 1671 CTLFLAG_RD, &sc->stats.rx_frames_undersize, 0, 1672 "Number undersize frames received"); 1673 1674 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_oversize", 1675 CTLFLAG_RD, &sc->stats.rx_frames_oversize, 0, 1676 "Number oversize frames received"); 1677 1678 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_jabber", 1679 CTLFLAG_RD, &sc->stats.rx_frames_jabber, 0, 1680 "Number jabber frames received"); 1681 1682 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_fcs_errs", 1683 CTLFLAG_RD, &sc->stats.rx_frames_fcs_errs, 0, 1684 "Number frames received with FCS errors"); 1685 1686 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_length_errs", 1687 CTLFLAG_RD, &sc->stats.rx_frames_length_errs, 0, 1688 "Number frames received with length errors"); 1689 1690 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_symbol_errs", 1691 CTLFLAG_RD, &sc->stats.rx_symbol_errs, 0, 1692 "Number receive symbol errors"); 1693 1694 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_align_errs", 1695 CTLFLAG_RD, &sc->stats.rx_align_errs, 0, 1696 "Number receive alignment errors"); 1697 1698 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_resource_errs", 1699 CTLFLAG_RD, &sc->stats.rx_resource_errs, 0, 1700 "Number frames received when no rx buffer available"); 1701 1702 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_overrun_errs", 1703 CTLFLAG_RD, &sc->stats.rx_overrun_errs, 0, 1704 "Number frames received but not copied due to receive overrun"); 1705 1706 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_ip_hdr_csum_errs", 1707 CTLFLAG_RD, &sc->stats.rx_ip_hdr_csum_errs, 0, 1708 "Number frames received with IP header checksum errors"); 1709 1710 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_tcp_csum_errs", 1711 CTLFLAG_RD, &sc->stats.rx_tcp_csum_errs, 0, 1712 "Number frames received with TCP checksum errors"); 1713 1714 SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rx_frames_udp_csum_errs", 1715 CTLFLAG_RD, &sc->stats.rx_udp_csum_errs, 0, 1716 "Number frames received with UDP checksum errors"); 1717 } 1718 1719 static int 1720 cgem_probe(device_t dev) 1721 { 1722 1723 if (!ofw_bus_status_okay(dev)) 1724 return (ENXIO); 1725 1726 if (ofw_bus_search_compatible(dev, compat_data)->ocd_str == NULL) 1727 return (ENXIO); 1728 1729 device_set_desc(dev, "Cadence CGEM Gigabit Ethernet Interface"); 1730 return (0); 1731 } 1732 1733 static int 1734 cgem_attach(device_t dev) 1735 { 1736 struct cgem_softc *sc = device_get_softc(dev); 1737 if_t ifp = NULL; 1738 int rid, err; 1739 u_char eaddr[ETHER_ADDR_LEN]; 1740 int hwquirks; 1741 phandle_t node; 1742 1743 sc->dev = dev; 1744 CGEM_LOCK_INIT(sc); 1745 1746 /* Key off of compatible string and set hardware-specific options. */ 1747 hwquirks = ofw_bus_search_compatible(dev, compat_data)->ocd_data; 1748 if ((hwquirks & HWQUIRK_NEEDNULLQS) != 0) 1749 sc->neednullqs = 1; 1750 if ((hwquirks & HWQUIRK_RXHANGWAR) != 0) 1751 sc->rxhangwar = 1; 1752 if ((hwquirks & HWQUIRK_TXCLK) != 0) { 1753 if (clk_get_by_ofw_name(dev, 0, "tx_clk", &sc->ref_clk) != 0) 1754 device_printf(dev, 1755 "could not retrieve reference clock.\n"); 1756 else if (clk_enable(sc->ref_clk) != 0) 1757 device_printf(dev, "could not enable clock.\n"); 1758 } 1759 if ((hwquirks & HWQUIRK_PCLK) != 0) { 1760 if (clk_get_by_ofw_name(dev, 0, "pclk", &sc->ref_clk) != 0) 1761 device_printf(dev, 1762 "could not retrieve reference clock.\n"); 1763 else if (clk_enable(sc->ref_clk) != 0) 1764 device_printf(dev, "could not enable clock.\n"); 1765 } 1766 1767 node = ofw_bus_get_node(dev); 1768 sc->phy_contype = mii_fdt_get_contype(node); 1769 1770 /* Get memory resource. */ 1771 rid = 0; 1772 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 1773 RF_ACTIVE); 1774 if (sc->mem_res == NULL) { 1775 device_printf(dev, "could not allocate memory resources.\n"); 1776 return (ENOMEM); 1777 } 1778 1779 /* Get IRQ resource. */ 1780 rid = 0; 1781 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 1782 RF_ACTIVE); 1783 if (sc->irq_res == NULL) { 1784 device_printf(dev, "could not allocate interrupt resource.\n"); 1785 cgem_detach(dev); 1786 return (ENOMEM); 1787 } 1788 1789 /* Set up ifnet structure. */ 1790 ifp = sc->ifp = if_alloc(IFT_ETHER); 1791 if (ifp == NULL) { 1792 device_printf(dev, "could not allocate ifnet structure\n"); 1793 cgem_detach(dev); 1794 return (ENOMEM); 1795 } 1796 if_setsoftc(ifp, sc); 1797 if_initname(ifp, IF_CGEM_NAME, device_get_unit(dev)); 1798 if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST); 1799 if_setinitfn(ifp, cgem_init); 1800 if_setioctlfn(ifp, cgem_ioctl); 1801 if_setstartfn(ifp, cgem_start); 1802 if_setcapabilitiesbit(ifp, IFCAP_HWCSUM | IFCAP_HWCSUM_IPV6 | 1803 IFCAP_VLAN_MTU | IFCAP_VLAN_HWCSUM, 0); 1804 if_setsendqlen(ifp, CGEM_NUM_TX_DESCS); 1805 if_setsendqready(ifp); 1806 1807 /* Disable hardware checksumming by default. */ 1808 if_sethwassist(ifp, 0); 1809 if_setcapenable(ifp, if_getcapabilities(ifp) & 1810 ~(IFCAP_HWCSUM | IFCAP_HWCSUM_IPV6 | IFCAP_VLAN_HWCSUM)); 1811 1812 sc->if_old_flags = if_getflags(ifp); 1813 sc->rxbufs = DEFAULT_NUM_RX_BUFS; 1814 1815 /* Reset hardware. */ 1816 CGEM_LOCK(sc); 1817 cgem_reset(sc); 1818 CGEM_UNLOCK(sc); 1819 1820 /* Attach phy to mii bus. */ 1821 err = mii_attach(dev, &sc->miibus, ifp, 1822 cgem_ifmedia_upd, cgem_ifmedia_sts, BMSR_DEFCAPMASK, 1823 MII_PHY_ANY, MII_OFFSET_ANY, 0); 1824 if (err) 1825 device_printf(dev, "warning: attaching PHYs failed\n"); 1826 1827 /* Set up TX and RX descriptor area. */ 1828 err = cgem_setup_descs(sc); 1829 if (err) { 1830 device_printf(dev, "could not set up dma mem for descs.\n"); 1831 cgem_detach(dev); 1832 return (ENOMEM); 1833 } 1834 1835 /* Get a MAC address. */ 1836 cgem_get_mac(sc, eaddr); 1837 1838 /* Start ticks. */ 1839 callout_init_mtx(&sc->tick_ch, &sc->sc_mtx, 0); 1840 1841 ether_ifattach(ifp, eaddr); 1842 1843 err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET | INTR_MPSAFE | 1844 INTR_EXCL, NULL, cgem_intr, sc, &sc->intrhand); 1845 if (err) { 1846 device_printf(dev, "could not set interrupt handler.\n"); 1847 ether_ifdetach(ifp); 1848 cgem_detach(dev); 1849 return (err); 1850 } 1851 1852 cgem_add_sysctls(dev); 1853 1854 return (0); 1855 } 1856 1857 static int 1858 cgem_detach(device_t dev) 1859 { 1860 struct cgem_softc *sc = device_get_softc(dev); 1861 int i; 1862 1863 if (sc == NULL) 1864 return (ENODEV); 1865 1866 if (device_is_attached(dev)) { 1867 CGEM_LOCK(sc); 1868 cgem_stop(sc); 1869 CGEM_UNLOCK(sc); 1870 callout_drain(&sc->tick_ch); 1871 if_setflagbits(sc->ifp, 0, IFF_UP); 1872 ether_ifdetach(sc->ifp); 1873 } 1874 1875 if (sc->miibus != NULL) { 1876 device_delete_child(dev, sc->miibus); 1877 sc->miibus = NULL; 1878 } 1879 1880 /* Release resources. */ 1881 if (sc->mem_res != NULL) { 1882 bus_release_resource(dev, SYS_RES_MEMORY, 1883 rman_get_rid(sc->mem_res), sc->mem_res); 1884 sc->mem_res = NULL; 1885 } 1886 if (sc->irq_res != NULL) { 1887 if (sc->intrhand) 1888 bus_teardown_intr(dev, sc->irq_res, sc->intrhand); 1889 bus_release_resource(dev, SYS_RES_IRQ, 1890 rman_get_rid(sc->irq_res), sc->irq_res); 1891 sc->irq_res = NULL; 1892 } 1893 1894 /* Release DMA resources. */ 1895 if (sc->rxring != NULL) { 1896 if (sc->rxring_physaddr != 0) { 1897 bus_dmamap_unload(sc->desc_dma_tag, 1898 sc->rxring_dma_map); 1899 sc->rxring_physaddr = 0; 1900 sc->txring_physaddr = 0; 1901 sc->null_qs_physaddr = 0; 1902 } 1903 bus_dmamem_free(sc->desc_dma_tag, sc->rxring, 1904 sc->rxring_dma_map); 1905 sc->rxring = NULL; 1906 sc->txring = NULL; 1907 sc->null_qs = NULL; 1908 1909 for (i = 0; i < CGEM_NUM_RX_DESCS; i++) 1910 if (sc->rxring_m_dmamap[i] != NULL) { 1911 bus_dmamap_destroy(sc->mbuf_dma_tag, 1912 sc->rxring_m_dmamap[i]); 1913 sc->rxring_m_dmamap[i] = NULL; 1914 } 1915 for (i = 0; i < CGEM_NUM_TX_DESCS; i++) 1916 if (sc->txring_m_dmamap[i] != NULL) { 1917 bus_dmamap_destroy(sc->mbuf_dma_tag, 1918 sc->txring_m_dmamap[i]); 1919 sc->txring_m_dmamap[i] = NULL; 1920 } 1921 } 1922 if (sc->desc_dma_tag != NULL) { 1923 bus_dma_tag_destroy(sc->desc_dma_tag); 1924 sc->desc_dma_tag = NULL; 1925 } 1926 if (sc->mbuf_dma_tag != NULL) { 1927 bus_dma_tag_destroy(sc->mbuf_dma_tag); 1928 sc->mbuf_dma_tag = NULL; 1929 } 1930 1931 if (sc->ref_clk != NULL) { 1932 clk_release(sc->ref_clk); 1933 sc->ref_clk = NULL; 1934 } 1935 1936 bus_generic_detach(dev); 1937 1938 CGEM_LOCK_DESTROY(sc); 1939 1940 return (0); 1941 } 1942 1943 static device_method_t cgem_methods[] = { 1944 /* Device interface */ 1945 DEVMETHOD(device_probe, cgem_probe), 1946 DEVMETHOD(device_attach, cgem_attach), 1947 DEVMETHOD(device_detach, cgem_detach), 1948 1949 /* MII interface */ 1950 DEVMETHOD(miibus_readreg, cgem_miibus_readreg), 1951 DEVMETHOD(miibus_writereg, cgem_miibus_writereg), 1952 DEVMETHOD(miibus_statchg, cgem_miibus_statchg), 1953 DEVMETHOD(miibus_linkchg, cgem_miibus_linkchg), 1954 1955 DEVMETHOD_END 1956 }; 1957 1958 static driver_t cgem_driver = { 1959 "cgem", 1960 cgem_methods, 1961 sizeof(struct cgem_softc), 1962 }; 1963 1964 DRIVER_MODULE(cgem, simplebus, cgem_driver, cgem_devclass, NULL, NULL); 1965 DRIVER_MODULE(miibus, cgem, miibus_driver, miibus_devclass, NULL, NULL); 1966 MODULE_DEPEND(cgem, miibus, 1, 1, 1); 1967 MODULE_DEPEND(cgem, ether, 1, 1, 1); 1968 SIMPLEBUS_PNP_INFO(compat_data); 1969