1 /* $NetBSD: hd64570.c,v 1.62 2024/09/14 21:22:37 andvar Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Christian E. Hopps 5 * Copyright (c) 1998 Vixie Enterprises 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 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. Neither the name of Vixie Enterprises nor the names 18 * of its contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY VIXIE ENTERPRISES AND 22 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 23 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 25 * DISCLAIMED. IN NO EVENT SHALL VIXIE ENTERPRISES OR 26 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 29 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 30 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * This software has been written for Vixie Enterprises by Michael Graff 36 * <explorer@flame.org>. To learn more about Vixie Enterprises, see 37 * ``http://www.vix.com''. 38 */ 39 40 /* 41 * TODO: 42 * 43 * o teach the receive logic about errors, and about long frames that 44 * span more than one input buffer. (Right now, receive/transmit is 45 * limited to one descriptor's buffer space, which is MTU + 4 bytes. 46 * This is currently 1504, which is large enough to hold the HDLC 47 * header and the packet itself. Packets which are too long are 48 * silently dropped on transmit and silently dropped on receive. 49 * o write code to handle the msci interrupts, needed only for CD 50 * and CTS changes. 51 * o consider switching back to a "queue tx with DMA active" model which 52 * should help sustain outgoing traffic 53 * o through clever use of bus_dma*() functions, it should be possible 54 * to map the mbuf's data area directly into a descriptor transmit 55 * buffer, removing the need to allocate extra memory. If, however, 56 * we run out of descriptors for this, we will need to then allocate 57 * one large mbuf, copy the fragmented chain into it, and put it onto 58 * a single descriptor. 59 * o use bus_dmamap_sync() with the right offset and lengths, rather 60 * than cheating and always sync'ing the whole region. 61 * 62 * o perhaps allow rx and tx to be in more than one page 63 * if not using DMA. currently the assumption is that 64 * rx uses a page and tx uses a page. 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: hd64570.c,v 1.62 2024/09/14 21:22:37 andvar Exp $"); 69 70 #include "opt_inet.h" 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/device.h> 75 #include <sys/mbuf.h> 76 #include <sys/socket.h> 77 #include <sys/sockio.h> 78 #include <sys/kernel.h> 79 80 #include <net/if.h> 81 #include <net/if_types.h> 82 83 #if defined(INET) || defined(INET6) 84 #include <netinet/in.h> 85 #include <netinet/in_systm.h> 86 #include <netinet/in_var.h> 87 #include <netinet/ip.h> 88 #ifdef INET6 89 #include <netinet6/in6_var.h> 90 #endif 91 #endif 92 93 #include <net/bpf.h> 94 95 #include <sys/cpu.h> 96 #include <sys/bus.h> 97 #include <sys/intr.h> 98 99 #include <dev/pci/pcivar.h> 100 #include <dev/pci/pcireg.h> 101 #include <dev/pci/pcidevs.h> 102 103 #include <dev/ic/hd64570reg.h> 104 #include <dev/ic/hd64570var.h> 105 106 #define SCA_DEBUG_RX 0x0001 107 #define SCA_DEBUG_TX 0x0002 108 #define SCA_DEBUG_CISCO 0x0004 109 #define SCA_DEBUG_DMA 0x0008 110 #define SCA_DEBUG_RXPKT 0x0010 111 #define SCA_DEBUG_TXPKT 0x0020 112 #define SCA_DEBUG_INTR 0x0040 113 #define SCA_DEBUG_CLOCK 0x0080 114 115 #if 0 116 #define SCA_DEBUG_LEVEL ( 0xFFFF ) 117 #else 118 #define SCA_DEBUG_LEVEL 0 119 #endif 120 121 u_int32_t sca_debug = SCA_DEBUG_LEVEL; 122 123 #if SCA_DEBUG_LEVEL > 0 124 #define SCA_DPRINTF(l, x) do { \ 125 if ((l) & sca_debug) \ 126 printf x;\ 127 } while (0) 128 #else 129 #define SCA_DPRINTF(l, x) 130 #endif 131 132 #if 0 133 #define SCA_USE_FASTQ /* use a split queue, one for fast traffic */ 134 #endif 135 136 static inline void msci_write_1(sca_port_t *, u_int, u_int8_t); 137 static inline u_int8_t msci_read_1(sca_port_t *, u_int); 138 139 static inline void dmac_write_1(sca_port_t *, u_int, u_int8_t); 140 static inline void dmac_write_2(sca_port_t *, u_int, u_int16_t); 141 static inline u_int8_t dmac_read_1(sca_port_t *, u_int); 142 static inline u_int16_t dmac_read_2(sca_port_t *, u_int); 143 144 static void sca_msci_init(struct sca_softc *, sca_port_t *); 145 static void sca_dmac_init(struct sca_softc *, sca_port_t *); 146 static void sca_dmac_rxinit(sca_port_t *); 147 148 static int sca_dmac_intr(sca_port_t *, u_int8_t); 149 static int sca_msci_intr(sca_port_t *, u_int8_t); 150 151 static void sca_get_packets(sca_port_t *); 152 static int sca_frame_avail(sca_port_t *); 153 static void sca_frame_process(sca_port_t *); 154 static void sca_frame_read_done(sca_port_t *); 155 156 static void sca_port_starttx(sca_port_t *); 157 158 static void sca_port_up(sca_port_t *); 159 static void sca_port_down(sca_port_t *); 160 161 static int sca_output(struct ifnet *, struct mbuf *, const struct sockaddr *, 162 const struct rtentry *); 163 static int sca_ioctl(struct ifnet *, u_long, void *); 164 static void sca_start(struct ifnet *); 165 static void sca_watchdog(struct ifnet *); 166 167 static struct mbuf *sca_mbuf_alloc(struct sca_softc *, void *, u_int); 168 169 #if SCA_DEBUG_LEVEL > 0 170 static void sca_frame_print(sca_port_t *, sca_desc_t *, u_int8_t *); 171 #endif 172 173 174 #define sca_read_1(sc, reg) (sc)->sc_read_1(sc, reg) 175 #define sca_read_2(sc, reg) (sc)->sc_read_2(sc, reg) 176 #define sca_write_1(sc, reg, val) (sc)->sc_write_1(sc, reg, val) 177 #define sca_write_2(sc, reg, val) (sc)->sc_write_2(sc, reg, val) 178 179 #define sca_page_addr(sc, addr) ((bus_addr_t)(u_long)(addr) & (sc)->scu_pagemask) 180 181 static inline void 182 msci_write_1(sca_port_t *scp, u_int reg, u_int8_t val) 183 { 184 sca_write_1(scp->sca, scp->msci_off + reg, val); 185 } 186 187 static inline u_int8_t 188 msci_read_1(sca_port_t *scp, u_int reg) 189 { 190 return sca_read_1(scp->sca, scp->msci_off + reg); 191 } 192 193 static inline void 194 dmac_write_1(sca_port_t *scp, u_int reg, u_int8_t val) 195 { 196 sca_write_1(scp->sca, scp->dmac_off + reg, val); 197 } 198 199 static inline void 200 dmac_write_2(sca_port_t *scp, u_int reg, u_int16_t val) 201 { 202 sca_write_2(scp->sca, scp->dmac_off + reg, val); 203 } 204 205 static inline u_int8_t 206 dmac_read_1(sca_port_t *scp, u_int reg) 207 { 208 return sca_read_1(scp->sca, scp->dmac_off + reg); 209 } 210 211 static inline u_int16_t 212 dmac_read_2(sca_port_t *scp, u_int reg) 213 { 214 return sca_read_2(scp->sca, scp->dmac_off + reg); 215 } 216 217 #if SCA_DEBUG_LEVEL > 0 218 /* 219 * read the chain pointer 220 */ 221 static inline u_int16_t 222 sca_desc_read_chainp(struct sca_softc *sc, struct sca_desc *dp) 223 { 224 if (sc->sc_usedma) 225 return ((dp)->sd_chainp); 226 return (bus_space_read_2(sc->scu_memt, sc->scu_memh, 227 sca_page_addr(sc, dp) + offsetof(struct sca_desc, sd_chainp))); 228 } 229 #endif 230 231 /* 232 * write the chain pointer 233 */ 234 static inline void 235 sca_desc_write_chainp(struct sca_softc *sc, struct sca_desc *dp, u_int16_t cp) 236 { 237 if (sc->sc_usedma) 238 (dp)->sd_chainp = cp; 239 else 240 bus_space_write_2(sc->scu_memt, sc->scu_memh, 241 sca_page_addr(sc, dp) 242 + offsetof(struct sca_desc, sd_chainp), cp); 243 } 244 245 #if SCA_DEBUG_LEVEL > 0 246 /* 247 * read the buffer pointer 248 */ 249 static inline u_int32_t 250 sca_desc_read_bufp(struct sca_softc *sc, struct sca_desc *dp) 251 { 252 u_int32_t address; 253 254 if (sc->sc_usedma) 255 address = dp->sd_bufp | dp->sd_hbufp << 16; 256 else { 257 address = bus_space_read_2(sc->scu_memt, sc->scu_memh, 258 sca_page_addr(sc, dp) + offsetof(struct sca_desc, sd_bufp)); 259 address |= bus_space_read_1(sc->scu_memt, sc->scu_memh, 260 sca_page_addr(sc, dp) 261 + offsetof(struct sca_desc, sd_hbufp)) << 16; 262 } 263 return (address); 264 } 265 #endif 266 267 /* 268 * write the buffer pointer 269 */ 270 static inline void 271 sca_desc_write_bufp(struct sca_softc *sc, struct sca_desc *dp, u_int32_t bufp) 272 { 273 if (sc->sc_usedma) { 274 dp->sd_bufp = bufp & 0xFFFF; 275 dp->sd_hbufp = (bufp & 0x00FF0000) >> 16; 276 } else { 277 bus_space_write_2(sc->scu_memt, sc->scu_memh, 278 sca_page_addr(sc, dp) + offsetof(struct sca_desc, sd_bufp), 279 bufp & 0xFFFF); 280 bus_space_write_1(sc->scu_memt, sc->scu_memh, 281 sca_page_addr(sc, dp) + offsetof(struct sca_desc, sd_hbufp), 282 (bufp & 0x00FF0000) >> 16); 283 } 284 } 285 286 /* 287 * read the buffer length 288 */ 289 static inline u_int16_t 290 sca_desc_read_buflen(struct sca_softc *sc, struct sca_desc *dp) 291 { 292 if (sc->sc_usedma) 293 return ((dp)->sd_buflen); 294 return (bus_space_read_2(sc->scu_memt, sc->scu_memh, 295 sca_page_addr(sc, dp) + offsetof(struct sca_desc, sd_buflen))); 296 } 297 298 /* 299 * write the buffer length 300 */ 301 static inline void 302 sca_desc_write_buflen(struct sca_softc *sc, struct sca_desc *dp, u_int16_t len) 303 { 304 if (sc->sc_usedma) 305 (dp)->sd_buflen = len; 306 else 307 bus_space_write_2(sc->scu_memt, sc->scu_memh, 308 sca_page_addr(sc, dp) 309 + offsetof(struct sca_desc, sd_buflen), len); 310 } 311 312 /* 313 * read the descriptor status 314 */ 315 static inline u_int8_t 316 sca_desc_read_stat(struct sca_softc *sc, struct sca_desc *dp) 317 { 318 if (sc->sc_usedma) 319 return ((dp)->sd_stat); 320 return (bus_space_read_1(sc->scu_memt, sc->scu_memh, 321 sca_page_addr(sc, dp) + offsetof(struct sca_desc, sd_stat))); 322 } 323 324 /* 325 * write the descriptor status 326 */ 327 static inline void 328 sca_desc_write_stat(struct sca_softc *sc, struct sca_desc *dp, u_int8_t stat) 329 { 330 if (sc->sc_usedma) 331 (dp)->sd_stat = stat; 332 else 333 bus_space_write_1(sc->scu_memt, sc->scu_memh, 334 sca_page_addr(sc, dp) + offsetof(struct sca_desc, sd_stat), 335 stat); 336 } 337 338 void 339 sca_init(struct sca_softc *sc) 340 { 341 /* 342 * Do a little sanity check: check number of ports. 343 */ 344 if (sc->sc_numports < 1 || sc->sc_numports > 2) 345 panic("sca can\'t handle more than 2 or less than 1 ports"); 346 347 /* 348 * disable DMA and MSCI interrupts 349 */ 350 sca_write_1(sc, SCA_DMER, 0); 351 sca_write_1(sc, SCA_IER0, 0); 352 sca_write_1(sc, SCA_IER1, 0); 353 sca_write_1(sc, SCA_IER2, 0); 354 355 /* 356 * configure interrupt system 357 */ 358 sca_write_1(sc, SCA_ITCR, 359 SCA_ITCR_INTR_PRI_MSCI | SCA_ITCR_ACK_NONE | SCA_ITCR_VOUT_IVR); 360 #if 0 361 /* these are for the interrupt ack cycle which we don't use */ 362 sca_write_1(sc, SCA_IVR, 0x40); 363 sca_write_1(sc, SCA_IMVR, 0x40); 364 #endif 365 366 /* 367 * set wait control register to zero wait states 368 */ 369 sca_write_1(sc, SCA_PABR0, 0); 370 sca_write_1(sc, SCA_PABR1, 0); 371 sca_write_1(sc, SCA_WCRL, 0); 372 sca_write_1(sc, SCA_WCRM, 0); 373 sca_write_1(sc, SCA_WCRH, 0); 374 375 /* 376 * disable DMA and reset status 377 */ 378 sca_write_1(sc, SCA_PCR, SCA_PCR_PR2); 379 380 /* 381 * disable transmit DMA for all channels 382 */ 383 sca_write_1(sc, SCA_DSR0 + SCA_DMAC_OFF_0, 0); 384 sca_write_1(sc, SCA_DCR0 + SCA_DMAC_OFF_0, SCA_DCR_ABRT); 385 sca_write_1(sc, SCA_DSR1 + SCA_DMAC_OFF_0, 0); 386 sca_write_1(sc, SCA_DCR1 + SCA_DMAC_OFF_0, SCA_DCR_ABRT); 387 sca_write_1(sc, SCA_DSR0 + SCA_DMAC_OFF_1, 0); 388 sca_write_1(sc, SCA_DCR0 + SCA_DMAC_OFF_1, SCA_DCR_ABRT); 389 sca_write_1(sc, SCA_DSR1 + SCA_DMAC_OFF_1, 0); 390 sca_write_1(sc, SCA_DCR1 + SCA_DMAC_OFF_1, SCA_DCR_ABRT); 391 392 /* 393 * enable DMA based on channel enable flags for each channel 394 */ 395 sca_write_1(sc, SCA_DMER, SCA_DMER_EN); 396 397 /* 398 * Should check to see if the chip is responding, but for now 399 * assume it is. 400 */ 401 } 402 403 /* 404 * initialize the port and attach it to the networking layer 405 */ 406 void 407 sca_port_attach(struct sca_softc *sc, u_int port) 408 { 409 struct timeval now; 410 sca_port_t *scp = &sc->sc_ports[port]; 411 struct ifnet *ifp; 412 static u_int ntwo_unit = 0; 413 414 scp->sca = sc; /* point back to the parent */ 415 416 scp->sp_port = port; 417 418 if (port == 0) { 419 scp->msci_off = SCA_MSCI_OFF_0; 420 scp->dmac_off = SCA_DMAC_OFF_0; 421 if(sc->sc_parent != NULL) 422 ntwo_unit = device_unit(sc->sc_parent) * 2 + 0; 423 else 424 ntwo_unit = 0; /* XXX */ 425 } else { 426 scp->msci_off = SCA_MSCI_OFF_1; 427 scp->dmac_off = SCA_DMAC_OFF_1; 428 if(sc->sc_parent != NULL) 429 ntwo_unit = device_unit(sc->sc_parent) * 2 + 1; 430 else 431 ntwo_unit = 1; /* XXX */ 432 } 433 434 sca_msci_init(sc, scp); 435 sca_dmac_init(sc, scp); 436 437 /* 438 * attach to the network layer 439 */ 440 ifp = &scp->sp_if; 441 snprintf(ifp->if_xname, sizeof(ifp->if_xname), "ntwo%d", ntwo_unit); 442 ifp->if_softc = scp; 443 ifp->if_mtu = SCA_MTU; 444 ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 445 ifp->if_type = IFT_PTPSERIAL; 446 ifp->if_hdrlen = HDLC_HDRLEN; 447 ifp->if_ioctl = sca_ioctl; 448 ifp->if_output = sca_output; 449 ifp->if_watchdog = sca_watchdog; 450 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 451 scp->linkq.ifq_maxlen = 5; /* if we exceed this we are hosed already */ 452 #ifdef SCA_USE_FASTQ 453 scp->fastq.ifq_maxlen = IFQ_MAXLEN; 454 #endif 455 IFQ_SET_READY(&ifp->if_snd); 456 if_attach(ifp); 457 if_deferred_start_init(ifp, NULL); 458 if_alloc_sadl(ifp); 459 bpf_attach(ifp, DLT_HDLC, HDLC_HDRLEN); 460 bpf_mtap_softint_init(ifp); 461 462 if (sc->sc_parent == NULL) 463 printf("%s: port %d\n", ifp->if_xname, port); 464 else 465 printf("%s at %s port %d\n", 466 ifp->if_xname, device_xname(sc->sc_parent), port); 467 468 /* 469 * reset the last seen times on the cisco keepalive protocol 470 */ 471 getmicrotime(&now); 472 scp->cka_lasttx = now.tv_usec; 473 scp->cka_lastrx = 0; 474 } 475 476 #if 0 477 /* 478 * returns log2(div), sets 'tmc' for the required freq 'hz' 479 */ 480 static u_int8_t 481 sca_msci_get_baud_rate_values(u_int32_t hz, u_int8_t *tmcp) 482 { 483 u_int32_t tmc, div; 484 u_int32_t clock; 485 486 /* clock hz = (chipclock / tmc) / 2^(div); */ 487 /* 488 * TD == tmc * 2^(n) 489 * 490 * note: 491 * 1 <= TD <= 256 TD is inc of 1 492 * 2 <= TD <= 512 TD is inc of 2 493 * 4 <= TD <= 1024 TD is inc of 4 494 * ... 495 * 512 <= TD <= 256*512 TD is inc of 512 496 * 497 * so note there are overlaps. We lose prec 498 * as div increases so we wish to minize div. 499 * 500 * basically we want to do 501 * 502 * tmc = chip / hz, but have tmc <= 256 503 */ 504 505 /* assume system clock is 9.8304MHz or 9830400Hz */ 506 clock = clock = 9830400 >> 1; 507 508 /* round down */ 509 div = 0; 510 while ((tmc = clock / hz) > 256 || (tmc == 256 && (clock / tmc) > hz)) { 511 clock >>= 1; 512 div++; 513 } 514 if (clock / tmc > hz) 515 tmc++; 516 if (!tmc) 517 tmc = 1; 518 519 if (div > SCA_RXS_DIV_512) { 520 /* set to maximums */ 521 div = SCA_RXS_DIV_512; 522 tmc = 0; 523 } 524 525 *tmcp = (tmc & 0xFF); /* 0 == 256 */ 526 return (div & 0xFF); 527 } 528 #endif 529 530 /* 531 * initialize the port's MSCI 532 */ 533 static void 534 sca_msci_init(struct sca_softc *sc, sca_port_t *scp) 535 { 536 /* reset the channel */ 537 msci_write_1(scp, SCA_CMD0, SCA_CMD_RESET); 538 539 msci_write_1(scp, SCA_MD00, 540 ( SCA_MD0_CRC_1 541 | SCA_MD0_CRC_CCITT 542 | SCA_MD0_CRC_ENABLE 543 | SCA_MD0_MODE_HDLC)); 544 #if 0 545 /* immediately send receive reset so the above takes */ 546 msci_write_1(scp, SCA_CMD0, SCA_CMD_RXRESET); 547 #endif 548 549 msci_write_1(scp, SCA_MD10, SCA_MD1_NOADDRCHK); 550 msci_write_1(scp, SCA_MD20, 551 (SCA_MD2_DUPLEX | SCA_MD2_ADPLLx8 | SCA_MD2_NRZ)); 552 553 /* be safe and do it again */ 554 msci_write_1(scp, SCA_CMD0, SCA_CMD_RXRESET); 555 556 /* setup underrun and idle control, and initial RTS state */ 557 msci_write_1(scp, SCA_CTL0, 558 (SCA_CTL_IDLC_PATTERN 559 | SCA_CTL_UDRNC_AFTER_FCS 560 | SCA_CTL_RTS_LOW)); 561 562 /* reset the transmitter */ 563 msci_write_1(scp, SCA_CMD0, SCA_CMD_TXRESET); 564 565 /* 566 * set the clock sources 567 */ 568 msci_write_1(scp, SCA_RXS0, scp->sp_rxs); 569 msci_write_1(scp, SCA_TXS0, scp->sp_txs); 570 msci_write_1(scp, SCA_TMC0, scp->sp_tmc); 571 572 /* set external clock generate as requested */ 573 sc->sc_clock_callback(sc->sc_aux, scp->sp_port, scp->sp_eclock); 574 575 /* 576 * XXX don't pay attention to CTS or CD changes right now. I can't 577 * simulate one, and the transmitter will try to transmit even if 578 * CD isn't there anyway, so nothing bad SHOULD happen. 579 */ 580 #if 0 581 msci_write_1(scp, SCA_IE00, 0); 582 msci_write_1(scp, SCA_IE10, 0); /* 0x0c == CD and CTS changes only */ 583 #else 584 /* this would deliver transmitter underrun to ST1/ISR1 */ 585 msci_write_1(scp, SCA_IE10, SCA_ST1_UDRN); 586 msci_write_1(scp, SCA_IE00, SCA_ST0_TXINT); 587 #endif 588 msci_write_1(scp, SCA_IE20, 0); 589 590 msci_write_1(scp, SCA_FIE0, 0); 591 592 msci_write_1(scp, SCA_SA00, 0); 593 msci_write_1(scp, SCA_SA10, 0); 594 595 msci_write_1(scp, SCA_IDL0, 0x7e); 596 597 msci_write_1(scp, SCA_RRC0, 0x0e); 598 /* msci_write_1(scp, SCA_TRC00, 0x10); */ 599 /* 600 * the correct values here are important for avoiding underruns 601 * for any value less than or equal to TRC0 txrdy is activated 602 * which will start the dmac transfer to the fifo. 603 * for buffer size >= TRC1 + 1 txrdy is cleared which will stop DMA. 604 * 605 * thus if we are using a very fast clock that empties the fifo 606 * quickly, delays in the dmac starting to fill the fifo can 607 * lead to underruns so we want a fairly full fifo to still 608 * cause the dmac to start. for cards with on board ram this 609 * has no effect on system performance. For cards that DMA 610 * to/from system memory it will cause more, shorter, 611 * bus accesses rather than fewer longer ones. 612 */ 613 msci_write_1(scp, SCA_TRC00, 0x00); 614 msci_write_1(scp, SCA_TRC10, 0x1f); 615 } 616 617 /* 618 * Take the memory for the port and construct two circular linked lists of 619 * descriptors (one tx, one rx) and set the pointers in these descriptors 620 * to point to the buffer space for this port. 621 */ 622 static void 623 sca_dmac_init(struct sca_softc *sc, sca_port_t *scp) 624 { 625 sca_desc_t *desc; 626 u_int32_t desc_p; 627 u_int32_t buf_p; 628 int i; 629 630 if (sc->sc_usedma) 631 bus_dmamap_sync(sc->scu_dmat, sc->scu_dmam, 0, sc->scu_allocsize, 632 BUS_DMASYNC_PREWRITE); 633 else { 634 /* 635 * XXX assumes that all tx desc and bufs in same page 636 */ 637 sc->scu_page_on(sc); 638 sc->scu_set_page(sc, scp->sp_txdesc_p); 639 } 640 641 desc = scp->sp_txdesc; 642 desc_p = scp->sp_txdesc_p; 643 buf_p = scp->sp_txbuf_p; 644 scp->sp_txcur = 0; 645 scp->sp_txinuse = 0; 646 647 #ifdef DEBUG 648 /* make sure that we won't wrap */ 649 if ((desc_p & 0xffff0000) != 650 ((desc_p + sizeof(*desc) * scp->sp_ntxdesc) & 0xffff0000)) 651 panic("sca: tx descriptors cross architecural boundary"); 652 if ((buf_p & 0xff000000) != 653 ((buf_p + SCA_BSIZE * scp->sp_ntxdesc) & 0xff000000)) 654 panic("sca: tx buffers cross architecural boundary"); 655 #endif 656 657 for (i = 0 ; i < scp->sp_ntxdesc ; i++) { 658 /* 659 * desc_p points to the physical address of the NEXT desc 660 */ 661 desc_p += sizeof(sca_desc_t); 662 663 sca_desc_write_chainp(sc, desc, desc_p & 0x0000ffff); 664 sca_desc_write_bufp(sc, desc, buf_p); 665 sca_desc_write_buflen(sc, desc, SCA_BSIZE); 666 sca_desc_write_stat(sc, desc, 0); 667 668 desc++; /* point to the next descriptor */ 669 buf_p += SCA_BSIZE; 670 } 671 672 /* 673 * "heal" the circular list by making the last entry point to the 674 * first. 675 */ 676 sca_desc_write_chainp(sc, desc - 1, scp->sp_txdesc_p & 0x0000ffff); 677 678 /* 679 * Now, initialize the transmit DMA logic 680 * 681 * CPB == chain pointer base address 682 */ 683 dmac_write_1(scp, SCA_DSR1, 0); 684 dmac_write_1(scp, SCA_DCR1, SCA_DCR_ABRT); 685 dmac_write_1(scp, SCA_DMR1, SCA_DMR_TMOD | SCA_DMR_NF); 686 /* XXX1 687 dmac_write_1(scp, SCA_DIR1, 688 (SCA_DIR_EOT | SCA_DIR_BOF | SCA_DIR_COF)); 689 */ 690 dmac_write_1(scp, SCA_DIR1, 691 (SCA_DIR_EOM | SCA_DIR_EOT | SCA_DIR_BOF | SCA_DIR_COF)); 692 dmac_write_1(scp, SCA_CPB1, 693 (u_int8_t)((scp->sp_txdesc_p & 0x00ff0000) >> 16)); 694 695 /* 696 * now, do the same thing for receive descriptors 697 * 698 * XXX assumes that all rx desc and bufs in same page 699 */ 700 if (!sc->sc_usedma) 701 sc->scu_set_page(sc, scp->sp_rxdesc_p); 702 703 desc = scp->sp_rxdesc; 704 desc_p = scp->sp_rxdesc_p; 705 buf_p = scp->sp_rxbuf_p; 706 707 #ifdef DEBUG 708 /* make sure that we won't wrap */ 709 if ((desc_p & 0xffff0000) != 710 ((desc_p + sizeof(*desc) * scp->sp_nrxdesc) & 0xffff0000)) 711 panic("sca: rx descriptors cross architecural boundary"); 712 if ((buf_p & 0xff000000) != 713 ((buf_p + SCA_BSIZE * scp->sp_nrxdesc) & 0xff000000)) 714 panic("sca: rx buffers cross architecural boundary"); 715 #endif 716 717 for (i = 0 ; i < scp->sp_nrxdesc; i++) { 718 /* 719 * desc_p points to the physical address of the NEXT desc 720 */ 721 desc_p += sizeof(sca_desc_t); 722 723 sca_desc_write_chainp(sc, desc, desc_p & 0x0000ffff); 724 sca_desc_write_bufp(sc, desc, buf_p); 725 /* sca_desc_write_buflen(sc, desc, SCA_BSIZE); */ 726 sca_desc_write_buflen(sc, desc, 0); 727 sca_desc_write_stat(sc, desc, 0); 728 729 desc++; /* point to the next descriptor */ 730 buf_p += SCA_BSIZE; 731 } 732 733 /* 734 * "heal" the circular list by making the last entry point to the 735 * first. 736 */ 737 sca_desc_write_chainp(sc, desc - 1, scp->sp_rxdesc_p & 0x0000ffff); 738 739 sca_dmac_rxinit(scp); 740 741 if (sc->sc_usedma) 742 bus_dmamap_sync(sc->scu_dmat, sc->scu_dmam, 743 0, sc->scu_allocsize, BUS_DMASYNC_POSTWRITE); 744 else 745 sc->scu_page_off(sc); 746 } 747 748 /* 749 * reset and reinitialize the receive DMA logic 750 */ 751 static void 752 sca_dmac_rxinit(sca_port_t *scp) 753 { 754 /* 755 * ... and the receive DMA logic ... 756 */ 757 dmac_write_1(scp, SCA_DSR0, 0); /* disable DMA */ 758 dmac_write_1(scp, SCA_DCR0, SCA_DCR_ABRT); 759 760 dmac_write_1(scp, SCA_DMR0, SCA_DMR_TMOD | SCA_DMR_NF); 761 dmac_write_2(scp, SCA_BFLL0, SCA_BSIZE); 762 763 /* reset descriptors to initial state */ 764 scp->sp_rxstart = 0; 765 scp->sp_rxend = scp->sp_nrxdesc - 1; 766 767 /* 768 * CPB == chain pointer base 769 * CDA == current descriptor address 770 * EDA == error descriptor address (overwrite position) 771 * because cda can't be eda when starting we always 772 * have a single buffer gap between cda and eda 773 */ 774 dmac_write_1(scp, SCA_CPB0, 775 (u_int8_t)((scp->sp_rxdesc_p & 0x00ff0000) >> 16)); 776 dmac_write_2(scp, SCA_CDAL0, (u_int16_t)(scp->sp_rxdesc_p & 0xffff)); 777 dmac_write_2(scp, SCA_EDAL0, (u_int16_t) 778 (scp->sp_rxdesc_p + (sizeof(sca_desc_t) * scp->sp_rxend))); 779 780 /* 781 * enable receiver DMA 782 */ 783 dmac_write_1(scp, SCA_DIR0, 784 (SCA_DIR_EOT | SCA_DIR_EOM | SCA_DIR_BOF | SCA_DIR_COF)); 785 dmac_write_1(scp, SCA_DSR0, SCA_DSR_DE); 786 } 787 788 /* 789 * Queue the packet for our start routine to transmit 790 */ 791 static int 792 sca_output( 793 struct ifnet *ifp, 794 struct mbuf *m, 795 const struct sockaddr *dst, 796 const struct rtentry *rt0) 797 { 798 struct hdlc_header *hdlc; 799 struct ifqueue *ifq = NULL; 800 int s, error, len; 801 short mflags; 802 803 error = 0; 804 805 if ((ifp->if_flags & IFF_UP) != IFF_UP) { 806 error = ENETDOWN; 807 goto bad; 808 } 809 810 /* 811 * If the queueing discipline needs packet classification, 812 * do it before prepending link headers. 813 */ 814 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 815 816 /* 817 * determine address family, and priority for this packet 818 */ 819 switch (dst->sa_family) { 820 #ifdef INET 821 case AF_INET: 822 #ifdef SCA_USE_FASTQ 823 if ((mtod(m, struct ip *)->ip_tos & IPTOS_LOWDELAY) 824 == IPTOS_LOWDELAY) 825 ifq = &((sca_port_t *)ifp->if_softc)->fastq; 826 #endif 827 /* 828 * Add cisco serial line header. If there is no 829 * space in the first mbuf, allocate another. 830 */ 831 M_PREPEND(m, sizeof(struct hdlc_header), M_DONTWAIT); 832 if (m == 0) 833 return (ENOBUFS); 834 hdlc = mtod(m, struct hdlc_header *); 835 hdlc->h_proto = htons(HDLC_PROTOCOL_IP); 836 break; 837 #endif 838 #ifdef INET6 839 case AF_INET6: 840 /* 841 * Add cisco serial line header. If there is no 842 * space in the first mbuf, allocate another. 843 */ 844 M_PREPEND(m, sizeof(struct hdlc_header), M_DONTWAIT); 845 if (m == 0) 846 return (ENOBUFS); 847 hdlc = mtod(m, struct hdlc_header *); 848 hdlc->h_proto = htons(HDLC_PROTOCOL_IPV6); 849 break; 850 #endif 851 default: 852 printf("%s: address family %d unsupported\n", 853 ifp->if_xname, dst->sa_family); 854 error = EAFNOSUPPORT; 855 goto bad; 856 } 857 858 /* finish */ 859 if ((m->m_flags & (M_BCAST | M_MCAST)) != 0) 860 hdlc->h_addr = CISCO_MULTICAST; 861 else 862 hdlc->h_addr = CISCO_UNICAST; 863 hdlc->h_resv = 0; 864 865 /* 866 * queue the packet. If interactive, use the fast queue. 867 */ 868 mflags = m->m_flags; 869 len = m->m_pkthdr.len; 870 s = splnet(); 871 if (ifq != NULL) { 872 if (IF_QFULL(ifq)) { 873 IF_DROP(ifq); 874 m_freem(m); 875 error = ENOBUFS; 876 } else 877 IF_ENQUEUE(ifq, m); 878 } else 879 IFQ_ENQUEUE(&ifp->if_snd, m, error); 880 net_stat_ref_t nsr = IF_STAT_GETREF(ifp); 881 if (error != 0) { 882 if_statinc_ref(ifp, nsr, if_oerrors); 883 if_statinc_ref(ifp, nsr, if_collisions); 884 IF_STAT_PUTREF(ifp); 885 splx(s); 886 return (error); 887 } 888 if_statadd_ref(ifp, nsr, if_obytes, len); 889 if (mflags & M_MCAST) 890 if_statinc_ref(ifp, nsr, if_omcasts); 891 IF_STAT_PUTREF(ifp); 892 893 sca_start(ifp); 894 splx(s); 895 896 return (error); 897 898 bad: 899 m_freem(m); 900 return (error); 901 } 902 903 static int 904 sca_ioctl(struct ifnet *ifp, u_long cmd, void *data) 905 { 906 struct ifreq *ifr; 907 struct ifaddr *ifa; 908 int error; 909 int s; 910 911 s = splnet(); 912 913 ifr = (struct ifreq *)data; 914 ifa = (struct ifaddr *)data; 915 error = 0; 916 917 switch (cmd) { 918 case SIOCINITIFADDR: 919 switch(ifa->ifa_addr->sa_family) { 920 #ifdef INET 921 case AF_INET: 922 #endif 923 #ifdef INET6 924 case AF_INET6: 925 #endif 926 #if defined(INET) || defined(INET6) 927 ifp->if_flags |= IFF_UP; 928 sca_port_up(ifp->if_softc); 929 break; 930 #endif 931 default: 932 error = EAFNOSUPPORT; 933 break; 934 } 935 break; 936 937 case SIOCSIFDSTADDR: 938 #ifdef INET 939 if (ifa->ifa_addr->sa_family == AF_INET) 940 break; 941 #endif 942 #ifdef INET6 943 if (ifa->ifa_addr->sa_family == AF_INET6) 944 break; 945 #endif 946 error = EAFNOSUPPORT; 947 break; 948 949 case SIOCADDMULTI: 950 case SIOCDELMULTI: 951 /* XXX need multicast group management code */ 952 if (ifr == 0) { 953 error = EAFNOSUPPORT; /* XXX */ 954 break; 955 } 956 switch (ifreq_getaddr(cmd, ifr)->sa_family) { 957 #ifdef INET 958 case AF_INET: 959 break; 960 #endif 961 #ifdef INET6 962 case AF_INET6: 963 break; 964 #endif 965 default: 966 error = EAFNOSUPPORT; 967 break; 968 } 969 break; 970 971 case SIOCSIFFLAGS: 972 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 973 break; 974 if (ifr->ifr_flags & IFF_UP) { 975 ifp->if_flags |= IFF_UP; 976 sca_port_up(ifp->if_softc); 977 } else { 978 ifp->if_flags &= ~IFF_UP; 979 sca_port_down(ifp->if_softc); 980 } 981 982 break; 983 984 default: 985 error = ifioctl_common(ifp, cmd, data); 986 } 987 988 splx(s); 989 return error; 990 } 991 992 /* 993 * start packet transmission on the interface 994 * 995 * MUST BE CALLED AT splnet() 996 */ 997 static void 998 sca_start(struct ifnet *ifp) 999 { 1000 sca_port_t *scp = ifp->if_softc; 1001 struct sca_softc *sc = scp->sca; 1002 struct mbuf *m, *mb_head; 1003 sca_desc_t *desc; 1004 u_int8_t *buf, stat; 1005 u_int32_t buf_p; 1006 int nexttx; 1007 int trigger_xmit; 1008 u_int len; 1009 1010 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: enter start\n")); 1011 1012 /* 1013 * can't queue when we are full or transmitter is busy 1014 */ 1015 #ifdef oldcode 1016 if ((scp->sp_txinuse >= (scp->sp_ntxdesc - 1)) 1017 || ((ifp->if_flags & IFF_OACTIVE) == IFF_OACTIVE)) 1018 return; 1019 #else 1020 if (scp->sp_txinuse 1021 || ((ifp->if_flags & IFF_OACTIVE) == IFF_OACTIVE)) 1022 return; 1023 #endif 1024 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: txinuse %d\n", scp->sp_txinuse)); 1025 1026 /* 1027 * XXX assume that all tx desc and bufs in same page 1028 */ 1029 if (sc->sc_usedma) 1030 bus_dmamap_sync(sc->scu_dmat, sc->scu_dmam, 1031 0, sc->scu_allocsize, 1032 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1033 else { 1034 sc->scu_page_on(sc); 1035 sc->scu_set_page(sc, scp->sp_txdesc_p); 1036 } 1037 1038 trigger_xmit = 0; 1039 1040 txloop: 1041 IF_DEQUEUE(&scp->linkq, mb_head); 1042 if (mb_head == NULL) 1043 #ifdef SCA_USE_FASTQ 1044 IF_DEQUEUE(&scp->fastq, mb_head); 1045 if (mb_head == NULL) 1046 #endif 1047 IFQ_DEQUEUE(&ifp->if_snd, mb_head); 1048 if (mb_head == NULL) 1049 goto start_xmit; 1050 1051 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: got mbuf\n")); 1052 #ifdef oldcode 1053 if (scp->txinuse != 0) { 1054 /* Kill EOT interrupts on the previous descriptor. */ 1055 desc = &scp->sp_txdesc[scp->txcur]; 1056 stat = sca_desc_read_stat(sc, desc); 1057 sca_desc_write_stat(sc, desc, stat & ~SCA_DESC_EOT); 1058 1059 /* Figure out what the next free descriptor is. */ 1060 nexttx = (scp->sp_txcur + 1) % scp->sp_ntxdesc; 1061 } else 1062 nexttx = 0; 1063 #endif /* oldcode */ 1064 1065 if (scp->sp_txinuse) 1066 nexttx = (scp->sp_txcur + 1) % scp->sp_ntxdesc; 1067 else 1068 nexttx = 0; 1069 1070 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: nexttx %d\n", nexttx)); 1071 1072 buf = scp->sp_txbuf + SCA_BSIZE * nexttx; 1073 buf_p = scp->sp_txbuf_p + SCA_BSIZE * nexttx; 1074 1075 /* XXX hoping we can delay the desc write till after we don't drop. */ 1076 desc = &scp->sp_txdesc[nexttx]; 1077 1078 /* XXX isn't this set already?? */ 1079 sca_desc_write_bufp(sc, desc, buf_p); 1080 len = 0; 1081 1082 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: buf %x buf_p %x\n", (u_int)buf, buf_p)); 1083 1084 #if 0 /* uncomment this for a core in cc1 */ 1085 X 1086 #endif 1087 /* 1088 * Run through the chain, copying data into the descriptor as we 1089 * go. If it won't fit in one transmission block, drop the packet. 1090 * No, this isn't nice, but most of the time it _will_ fit. 1091 */ 1092 for (m = mb_head ; m != NULL ; m = m->m_next) { 1093 if (m->m_len != 0) { 1094 len += m->m_len; 1095 if (len > SCA_BSIZE) { 1096 m_freem(mb_head); 1097 goto txloop; 1098 } 1099 SCA_DPRINTF(SCA_DEBUG_TX, 1100 ("TX: about to mbuf len %d\n", m->m_len)); 1101 1102 if (sc->sc_usedma) 1103 memcpy(buf, mtod(m, u_int8_t *), m->m_len); 1104 else 1105 bus_space_write_region_1(sc->scu_memt, 1106 sc->scu_memh, sca_page_addr(sc, buf_p), 1107 mtod(m, u_int8_t *), m->m_len); 1108 buf += m->m_len; 1109 buf_p += m->m_len; 1110 } 1111 } 1112 1113 /* set the buffer, the length, and mark end of frame and end of xfer */ 1114 sca_desc_write_buflen(sc, desc, len); 1115 sca_desc_write_stat(sc, desc, SCA_DESC_EOM); 1116 1117 if_statinc(ifp, if_opackets); 1118 1119 /* 1120 * Pass packet to bpf if there is a listener. 1121 */ 1122 bpf_mtap(ifp, mb_head, BPF_D_OUT); 1123 1124 m_freem(mb_head); 1125 1126 scp->sp_txcur = nexttx; 1127 scp->sp_txinuse++; 1128 trigger_xmit = 1; 1129 1130 SCA_DPRINTF(SCA_DEBUG_TX, 1131 ("TX: inuse %d index %d\n", scp->sp_txinuse, scp->sp_txcur)); 1132 1133 /* 1134 * XXX so didn't this used to limit us to 1?! - multi may be untested 1135 * sp_ntxdesc used to be hard coded to 2 with claim of a too hard 1136 * to find bug 1137 */ 1138 #ifdef oldcode 1139 if (scp->sp_txinuse < (scp->sp_ntxdesc - 1)) 1140 #endif 1141 if (scp->sp_txinuse < scp->sp_ntxdesc) 1142 goto txloop; 1143 1144 start_xmit: 1145 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: trigger_xmit %d\n", trigger_xmit)); 1146 1147 if (trigger_xmit != 0) { 1148 /* set EOT on final descriptor */ 1149 desc = &scp->sp_txdesc[scp->sp_txcur]; 1150 stat = sca_desc_read_stat(sc, desc); 1151 sca_desc_write_stat(sc, desc, stat | SCA_DESC_EOT); 1152 } 1153 1154 if (sc->sc_usedma) 1155 bus_dmamap_sync(sc->scu_dmat, sc->scu_dmam, 0, 1156 sc->scu_allocsize, 1157 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1158 1159 if (trigger_xmit != 0) 1160 sca_port_starttx(scp); 1161 1162 if (!sc->sc_usedma) 1163 sc->scu_page_off(sc); 1164 } 1165 1166 static void 1167 sca_watchdog(struct ifnet *ifp) 1168 { 1169 } 1170 1171 int 1172 sca_hardintr(struct sca_softc *sc) 1173 { 1174 u_int8_t isr0, isr1, isr2; 1175 int ret; 1176 1177 ret = 0; /* non-zero means we processed at least one interrupt */ 1178 1179 SCA_DPRINTF(SCA_DEBUG_INTR, ("sca_hardintr entered\n")); 1180 1181 while (1) { 1182 /* 1183 * read SCA interrupts 1184 */ 1185 isr0 = sca_read_1(sc, SCA_ISR0); 1186 isr1 = sca_read_1(sc, SCA_ISR1); 1187 isr2 = sca_read_1(sc, SCA_ISR2); 1188 1189 if (isr0 == 0 && isr1 == 0 && isr2 == 0) 1190 break; 1191 1192 SCA_DPRINTF(SCA_DEBUG_INTR, 1193 ("isr0 = %02x, isr1 = %02x, isr2 = %02x\n", 1194 isr0, isr1, isr2)); 1195 1196 /* 1197 * check DMAC interrupt 1198 */ 1199 if (isr1 & 0x0f) 1200 ret += sca_dmac_intr(&sc->sc_ports[0], 1201 isr1 & 0x0f); 1202 1203 if (isr1 & 0xf0) 1204 ret += sca_dmac_intr(&sc->sc_ports[1], 1205 (isr1 & 0xf0) >> 4); 1206 1207 /* 1208 * msci interrupts 1209 */ 1210 if (isr0 & 0x0f) 1211 ret += sca_msci_intr(&sc->sc_ports[0], isr0 & 0x0f); 1212 1213 if (isr0 & 0xf0) 1214 ret += sca_msci_intr(&sc->sc_ports[1], 1215 (isr0 & 0xf0) >> 4); 1216 1217 #if 0 /* We don't GET timer interrupts, we have them disabled (msci IE20) */ 1218 if (isr2) 1219 ret += sca_timer_intr(sc, isr2); 1220 #endif 1221 } 1222 1223 return (ret); 1224 } 1225 1226 static int 1227 sca_dmac_intr(sca_port_t *scp, u_int8_t isr) 1228 { 1229 u_int8_t dsr; 1230 int ret; 1231 1232 ret = 0; 1233 1234 /* 1235 * Check transmit channel 1236 */ 1237 if (isr & (SCA_ISR1_DMAC_TX0A | SCA_ISR1_DMAC_TX0B)) { 1238 SCA_DPRINTF(SCA_DEBUG_INTR, 1239 ("TX INTERRUPT port %d\n", scp->sp_port)); 1240 1241 dsr = 1; 1242 while (dsr != 0) { 1243 ret++; 1244 /* 1245 * reset interrupt 1246 */ 1247 dsr = dmac_read_1(scp, SCA_DSR1); 1248 dmac_write_1(scp, SCA_DSR1, 1249 dsr | SCA_DSR_DEWD); 1250 1251 /* 1252 * filter out the bits we don't care about 1253 */ 1254 dsr &= ( SCA_DSR_COF | SCA_DSR_BOF | SCA_DSR_EOT); 1255 if (dsr == 0) 1256 break; 1257 1258 /* 1259 * check for counter overflow 1260 */ 1261 if (dsr & SCA_DSR_COF) { 1262 printf("%s: TXDMA counter overflow\n", 1263 scp->sp_if.if_xname); 1264 1265 scp->sp_if.if_flags &= ~IFF_OACTIVE; 1266 scp->sp_txcur = 0; 1267 scp->sp_txinuse = 0; 1268 } 1269 1270 /* 1271 * check for buffer overflow 1272 */ 1273 if (dsr & SCA_DSR_BOF) { 1274 printf("%s: TXDMA buffer overflow, cda 0x%04x, eda 0x%04x, cpb 0x%02x\n", 1275 scp->sp_if.if_xname, 1276 dmac_read_2(scp, SCA_CDAL1), 1277 dmac_read_2(scp, SCA_EDAL1), 1278 dmac_read_1(scp, SCA_CPB1)); 1279 1280 /* 1281 * Yikes. Arrange for a full 1282 * transmitter restart. 1283 */ 1284 scp->sp_if.if_flags &= ~IFF_OACTIVE; 1285 scp->sp_txcur = 0; 1286 scp->sp_txinuse = 0; 1287 } 1288 1289 /* 1290 * check for end of transfer, which is not 1291 * an error. It means that all data queued 1292 * was transmitted, and we mark ourself as 1293 * not in use and stop the watchdog timer. 1294 */ 1295 if (dsr & SCA_DSR_EOT) { 1296 SCA_DPRINTF(SCA_DEBUG_TX, 1297 ("Transmit completed. cda %x eda %x dsr %x\n", 1298 dmac_read_2(scp, SCA_CDAL1), 1299 dmac_read_2(scp, SCA_EDAL1), 1300 dsr)); 1301 1302 scp->sp_if.if_flags &= ~IFF_OACTIVE; 1303 scp->sp_txcur = 0; 1304 scp->sp_txinuse = 0; 1305 1306 /* 1307 * check for more packets 1308 */ 1309 if_schedule_deferred_start(&scp->sp_if); 1310 } 1311 } 1312 } 1313 /* 1314 * receive channel check 1315 */ 1316 if (isr & (SCA_ISR1_DMAC_RX0A | SCA_ISR1_DMAC_RX0B)) { 1317 SCA_DPRINTF(SCA_DEBUG_INTR, ("RX INTERRUPT port %d\n", 1318 (scp == &scp->sca->sc_ports[0] ? 0 : 1))); 1319 1320 dsr = 1; 1321 while (dsr != 0) { 1322 ret++; 1323 1324 dsr = dmac_read_1(scp, SCA_DSR0); 1325 dmac_write_1(scp, SCA_DSR0, dsr | SCA_DSR_DEWD); 1326 1327 /* 1328 * filter out the bits we don't care about 1329 */ 1330 dsr &= (SCA_DSR_EOM | SCA_DSR_COF 1331 | SCA_DSR_BOF | SCA_DSR_EOT); 1332 if (dsr == 0) 1333 break; 1334 1335 /* 1336 * End of frame 1337 */ 1338 if (dsr & SCA_DSR_EOM) { 1339 SCA_DPRINTF(SCA_DEBUG_RX, ("Got a frame!\n")); 1340 1341 sca_get_packets(scp); 1342 } 1343 1344 /* 1345 * check for counter overflow 1346 */ 1347 if (dsr & SCA_DSR_COF) { 1348 printf("%s: RXDMA counter overflow\n", 1349 scp->sp_if.if_xname); 1350 1351 sca_dmac_rxinit(scp); 1352 } 1353 1354 /* 1355 * check for end of transfer, which means we 1356 * ran out of descriptors to receive into. 1357 * This means the line is much faster than 1358 * we can handle. 1359 */ 1360 if (dsr & (SCA_DSR_BOF | SCA_DSR_EOT)) { 1361 printf("%s: RXDMA buffer overflow\n", 1362 scp->sp_if.if_xname); 1363 1364 sca_dmac_rxinit(scp); 1365 } 1366 } 1367 } 1368 1369 return ret; 1370 } 1371 1372 static int 1373 sca_msci_intr(sca_port_t *scp, u_int8_t isr) 1374 { 1375 u_int8_t st1, trc0; 1376 1377 /* get and clear the specific interrupt -- should act on it :)*/ 1378 if ((st1 = msci_read_1(scp, SCA_ST10))) { 1379 /* clear the interrupt */ 1380 msci_write_1(scp, SCA_ST10, st1); 1381 1382 if (st1 & SCA_ST1_UDRN) { 1383 /* underrun -- try to increase ready control */ 1384 trc0 = msci_read_1(scp, SCA_TRC00); 1385 if (trc0 == 0x1f) 1386 printf("TX: underrun - fifo depth maxed\n"); 1387 else { 1388 if ((trc0 += 2) > 0x1f) 1389 trc0 = 0x1f; 1390 SCA_DPRINTF(SCA_DEBUG_TX, 1391 ("TX: udrn - incr fifo to %d\n", trc0)); 1392 msci_write_1(scp, SCA_TRC00, trc0); 1393 } 1394 } 1395 } 1396 return (0); 1397 } 1398 1399 static void 1400 sca_get_packets(sca_port_t *scp) 1401 { 1402 struct sca_softc *sc; 1403 1404 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: sca_get_packets\n")); 1405 1406 sc = scp->sca; 1407 if (sc->sc_usedma) 1408 bus_dmamap_sync(sc->scu_dmat, sc->scu_dmam, 1409 0, sc->scu_allocsize, 1410 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1411 else { 1412 /* 1413 * XXX this code is unable to deal with rx stuff 1414 * in more than 1 page 1415 */ 1416 sc->scu_page_on(sc); 1417 sc->scu_set_page(sc, scp->sp_rxdesc_p); 1418 } 1419 1420 /* process as many frames as are available */ 1421 while (sca_frame_avail(scp)) { 1422 sca_frame_process(scp); 1423 sca_frame_read_done(scp); 1424 } 1425 1426 if (sc->sc_usedma) 1427 bus_dmamap_sync(sc->scu_dmat, sc->scu_dmam, 1428 0, sc->scu_allocsize, 1429 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1430 else 1431 sc->scu_page_off(sc); 1432 } 1433 1434 /* 1435 * Starting with the first descriptor we wanted to read into, up to but 1436 * not including the current SCA read descriptor, look for a packet. 1437 * 1438 * must be called at splnet() 1439 */ 1440 static int 1441 sca_frame_avail(sca_port_t *scp) 1442 { 1443 u_int16_t cda; 1444 u_int32_t desc_p; /* physical address (lower 16 bits) */ 1445 sca_desc_t *desc; 1446 u_int8_t rxstat; 1447 int cdaidx, toolong; 1448 1449 /* 1450 * Read the current descriptor from the SCA. 1451 */ 1452 cda = dmac_read_2(scp, SCA_CDAL0); 1453 1454 /* 1455 * calculate the index of the current descriptor 1456 */ 1457 desc_p = (scp->sp_rxdesc_p & 0xFFFF); 1458 desc_p = cda - desc_p; 1459 cdaidx = desc_p / sizeof(sca_desc_t); 1460 1461 SCA_DPRINTF(SCA_DEBUG_RX, 1462 ("RX: cda %x desc_p %x cdaidx %u, nrxdesc %d rxstart %d\n", 1463 cda, desc_p, cdaidx, scp->sp_nrxdesc, scp->sp_rxstart)); 1464 1465 /* note confusion */ 1466 if (cdaidx >= scp->sp_nrxdesc) 1467 panic("current descriptor index out of range"); 1468 1469 /* see if we have a valid frame available */ 1470 toolong = 0; 1471 for (; scp->sp_rxstart != cdaidx; sca_frame_read_done(scp)) { 1472 /* 1473 * We might have a valid descriptor. Set up a pointer 1474 * to the kva address for it so we can more easily examine 1475 * the contents. 1476 */ 1477 desc = &scp->sp_rxdesc[scp->sp_rxstart]; 1478 rxstat = sca_desc_read_stat(scp->sca, desc); 1479 1480 SCA_DPRINTF(SCA_DEBUG_RX, ("port %d RX: idx %d rxstat %x\n", 1481 scp->sp_port, scp->sp_rxstart, rxstat)); 1482 1483 SCA_DPRINTF(SCA_DEBUG_RX, ("port %d RX: buflen %d\n", 1484 scp->sp_port, sca_desc_read_buflen(scp->sca, desc))); 1485 1486 /* 1487 * check for errors 1488 */ 1489 if (rxstat & SCA_DESC_ERRORS) { 1490 /* 1491 * consider an error condition the end 1492 * of a frame 1493 */ 1494 if_statinc(&scp->sp_if, if_ierrors); 1495 toolong = 0; 1496 continue; 1497 } 1498 1499 /* 1500 * if we aren't skipping overlong frames 1501 * we are done, otherwise reset and look for 1502 * another good frame 1503 */ 1504 if (rxstat & SCA_DESC_EOM) { 1505 if (!toolong) 1506 return (1); 1507 toolong = 0; 1508 } else if (!toolong) { 1509 /* 1510 * we currently don't deal with frames 1511 * larger than a single buffer (fixed MTU) 1512 */ 1513 if_statinc(&scp->sp_if, if_ierrors); 1514 toolong = 1; 1515 } 1516 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: idx %d no EOM\n", 1517 scp->sp_rxstart)); 1518 } 1519 1520 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: returning none\n")); 1521 return 0; 1522 } 1523 1524 /* 1525 * Pass the packet up to the kernel if it is a packet we want to pay 1526 * attention to. 1527 * 1528 * MUST BE CALLED AT splnet() 1529 */ 1530 static void 1531 sca_frame_process(sca_port_t *scp) 1532 { 1533 pktqueue_t *pktq = NULL; 1534 struct hdlc_header *hdlc; 1535 struct cisco_pkt *cisco; 1536 sca_desc_t *desc; 1537 struct mbuf *m; 1538 u_int8_t *bufp; 1539 u_int16_t len; 1540 u_int32_t t; 1541 1542 t = time_uptime * 1000; 1543 desc = &scp->sp_rxdesc[scp->sp_rxstart]; 1544 bufp = scp->sp_rxbuf + SCA_BSIZE * scp->sp_rxstart; 1545 len = sca_desc_read_buflen(scp->sca, desc); 1546 1547 SCA_DPRINTF(SCA_DEBUG_RX, 1548 ("RX: desc %lx bufp %lx len %d\n", (bus_addr_t)desc, 1549 (bus_addr_t)bufp, len)); 1550 1551 #if SCA_DEBUG_LEVEL > 0 1552 if (sca_debug & SCA_DEBUG_RXPKT) 1553 sca_frame_print(scp, desc, bufp); 1554 #endif 1555 /* 1556 * skip packets that are too short 1557 */ 1558 if (len < sizeof(struct hdlc_header)) { 1559 if_statinc(&scp->sp_if, if_ierrors); 1560 return; 1561 } 1562 1563 m = sca_mbuf_alloc(scp->sca, bufp, len); 1564 if (m == NULL) { 1565 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: no mbuf!\n")); 1566 return; 1567 } 1568 1569 /* 1570 * read and then strip off the HDLC information 1571 */ 1572 m = m_pullup(m, sizeof(struct hdlc_header)); 1573 if (m == NULL) { 1574 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: no m_pullup!\n")); 1575 return; 1576 } 1577 1578 bpf_mtap_softint(&scp->sp_if, m); 1579 1580 if_statinc(&scp->sp_if, if_ipackets); 1581 1582 hdlc = mtod(m, struct hdlc_header *); 1583 switch (ntohs(hdlc->h_proto)) { 1584 #ifdef INET 1585 case HDLC_PROTOCOL_IP: 1586 SCA_DPRINTF(SCA_DEBUG_RX, ("Received IP packet\n")); 1587 m_set_rcvif(m, &scp->sp_if); 1588 m->m_pkthdr.len -= sizeof(struct hdlc_header); 1589 m->m_data += sizeof(struct hdlc_header); 1590 m->m_len -= sizeof(struct hdlc_header); 1591 pktq = ip_pktq; 1592 break; 1593 #endif /* INET */ 1594 #ifdef INET6 1595 case HDLC_PROTOCOL_IPV6: 1596 SCA_DPRINTF(SCA_DEBUG_RX, ("Received IP packet\n")); 1597 m_set_rcvif(m, &scp->sp_if); 1598 m->m_pkthdr.len -= sizeof(struct hdlc_header); 1599 m->m_data += sizeof(struct hdlc_header); 1600 m->m_len -= sizeof(struct hdlc_header); 1601 pktq = ip6_pktq; 1602 break; 1603 #endif /* INET6 */ 1604 case CISCO_KEEPALIVE: 1605 SCA_DPRINTF(SCA_DEBUG_CISCO, 1606 ("Received CISCO keepalive packet\n")); 1607 1608 if (len < CISCO_PKT_LEN) { 1609 SCA_DPRINTF(SCA_DEBUG_CISCO, 1610 ("short CISCO packet %d, wanted %d\n", 1611 len, CISCO_PKT_LEN)); 1612 if_statinc(&scp->sp_if, if_ierrors); 1613 goto dropit; 1614 } 1615 1616 m = m_pullup(m, sizeof(struct cisco_pkt)); 1617 if (m == NULL) { 1618 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: no m_pullup!\n")); 1619 return; 1620 } 1621 1622 cisco = (struct cisco_pkt *) 1623 (mtod(m, u_int8_t *) + HDLC_HDRLEN); 1624 m_set_rcvif(m, &scp->sp_if); 1625 1626 switch (ntohl(cisco->type)) { 1627 case CISCO_ADDR_REQ: 1628 printf("Got CISCO addr_req, ignoring\n"); 1629 if_statinc(&scp->sp_if, if_ierrors); 1630 goto dropit; 1631 1632 case CISCO_ADDR_REPLY: 1633 printf("Got CISCO addr_reply, ignoring\n"); 1634 if_statinc(&scp->sp_if, if_ierrors); 1635 goto dropit; 1636 1637 case CISCO_KEEPALIVE_REQ: 1638 1639 SCA_DPRINTF(SCA_DEBUG_CISCO, 1640 ("Received KA, mseq %d," 1641 " yseq %d, rel 0x%04x, t0" 1642 " %04x, t1 %04x\n", 1643 ntohl(cisco->par1), ntohl(cisco->par2), 1644 ntohs(cisco->rel), ntohs(cisco->time0), 1645 ntohs(cisco->time1))); 1646 1647 scp->cka_lastrx = ntohl(cisco->par1); 1648 scp->cka_lasttx++; 1649 1650 /* 1651 * schedule the transmit right here. 1652 */ 1653 cisco->par2 = cisco->par1; 1654 cisco->par1 = htonl(scp->cka_lasttx); 1655 cisco->time0 = htons((u_int16_t)(t >> 16)); 1656 cisco->time1 = htons((u_int16_t)(t & 0x0000ffff)); 1657 1658 if (IF_QFULL(&scp->linkq)) { 1659 IF_DROP(&scp->linkq); 1660 goto dropit; 1661 } 1662 IF_ENQUEUE(&scp->linkq, m); 1663 1664 sca_start(&scp->sp_if); 1665 1666 /* since start may have reset this fix */ 1667 if (!scp->sca->sc_usedma) { 1668 scp->sca->scu_set_page(scp->sca, 1669 scp->sp_rxdesc_p); 1670 scp->sca->scu_page_on(scp->sca); 1671 } 1672 return; 1673 default: 1674 SCA_DPRINTF(SCA_DEBUG_CISCO, 1675 ("Unknown CISCO keepalive protocol 0x%04x\n", 1676 ntohl(cisco->type))); 1677 1678 if_statinc(&scp->sp_if, if_noproto); 1679 goto dropit; 1680 } 1681 return; 1682 default: 1683 SCA_DPRINTF(SCA_DEBUG_RX, 1684 ("Unknown/unexpected ethertype 0x%04x\n", 1685 ntohs(hdlc->h_proto))); 1686 if_statinc(&scp->sp_if, if_noproto); 1687 goto dropit; 1688 } 1689 1690 /* Queue the packet */ 1691 KASSERT(pktq != NULL); 1692 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 1693 if_statinc(&scp->sp_if, if_iqdrops); 1694 goto dropit; 1695 } 1696 return; 1697 dropit: 1698 m_freem(m); 1699 return; 1700 } 1701 1702 #if SCA_DEBUG_LEVEL > 0 1703 /* 1704 * do a hex dump of the packet received into descriptor "desc" with 1705 * data buffer "p" 1706 */ 1707 static void 1708 sca_frame_print(sca_port_t *scp, sca_desc_t *desc, u_int8_t *p) 1709 { 1710 int i; 1711 int nothing_yet = 1; 1712 struct sca_softc *sc; 1713 u_int len; 1714 1715 sc = scp->sca; 1716 printf("desc va %p: chainp 0x%x bufp 0x%0x stat 0x%0x len %d\n", 1717 desc, 1718 sca_desc_read_chainp(sc, desc), 1719 sca_desc_read_bufp(sc, desc), 1720 sca_desc_read_stat(sc, desc), 1721 (len = sca_desc_read_buflen(sc, desc))); 1722 1723 for (i = 0 ; i < len && i < 256; i++) { 1724 if (nothing_yet == 1 && 1725 (sc->sc_usedma ? *p 1726 : bus_space_read_1(sc->scu_memt, sc->scu_memh, 1727 sca_page_addr(sc, p))) == 0) { 1728 p++; 1729 continue; 1730 } 1731 nothing_yet = 0; 1732 if (i % 16 == 0) 1733 printf("\n"); 1734 printf("%02x ", 1735 (sc->sc_usedma ? *p 1736 : bus_space_read_1(sc->scu_memt, sc->scu_memh, 1737 sca_page_addr(sc, p)))); 1738 p++; 1739 } 1740 1741 if (i % 16 != 1) 1742 printf("\n"); 1743 } 1744 #endif 1745 1746 /* 1747 * adjust things because we have just read the current starting 1748 * frame 1749 * 1750 * must be called at splnet() 1751 */ 1752 static void 1753 sca_frame_read_done(sca_port_t *scp) 1754 { 1755 u_int16_t edesc_p; 1756 1757 /* update where our indices are */ 1758 scp->sp_rxend = scp->sp_rxstart; 1759 scp->sp_rxstart = (scp->sp_rxstart + 1) % scp->sp_nrxdesc; 1760 1761 /* update the error [end] descriptor */ 1762 edesc_p = (u_int16_t)scp->sp_rxdesc_p + 1763 (sizeof(sca_desc_t) * scp->sp_rxend); 1764 dmac_write_2(scp, SCA_EDAL0, edesc_p); 1765 } 1766 1767 /* 1768 * set a port to the "up" state 1769 */ 1770 static void 1771 sca_port_up(sca_port_t *scp) 1772 { 1773 struct sca_softc *sc = scp->sca; 1774 struct timeval now; 1775 #if 0 1776 u_int8_t ier0, ier1; 1777 #endif 1778 1779 /* 1780 * reset things 1781 */ 1782 #if 0 1783 msci_write_1(scp, SCA_CMD0, SCA_CMD_TXRESET); 1784 msci_write_1(scp, SCA_CMD0, SCA_CMD_RXRESET); 1785 #endif 1786 /* 1787 * clear in-use flag 1788 */ 1789 scp->sp_if.if_flags &= ~IFF_OACTIVE; 1790 scp->sp_if.if_flags |= IFF_RUNNING; 1791 1792 /* 1793 * raise DTR 1794 */ 1795 sc->sc_dtr_callback(sc->sc_aux, scp->sp_port, 1); 1796 1797 /* 1798 * raise RTS 1799 */ 1800 msci_write_1(scp, SCA_CTL0, 1801 (msci_read_1(scp, SCA_CTL0) & ~SCA_CTL_RTS_MASK) 1802 | SCA_CTL_RTS_HIGH); 1803 1804 #if 0 1805 /* 1806 * enable interrupts (no timer IER2) 1807 */ 1808 ier0 = SCA_IER0_MSCI_RXRDY0 | SCA_IER0_MSCI_TXRDY0 1809 | SCA_IER0_MSCI_RXINT0 | SCA_IER0_MSCI_TXINT0; 1810 ier1 = SCA_IER1_DMAC_RX0A | SCA_IER1_DMAC_RX0B 1811 | SCA_IER1_DMAC_TX0A | SCA_IER1_DMAC_TX0B; 1812 if (scp->sp_port == 1) { 1813 ier0 <<= 4; 1814 ier1 <<= 4; 1815 } 1816 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) | ier0); 1817 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) | ier1); 1818 #else 1819 if (scp->sp_port == 0) { 1820 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) | 0x0f); 1821 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) | 0x0f); 1822 } else { 1823 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) | 0xf0); 1824 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) | 0xf0); 1825 } 1826 #endif 1827 1828 /* 1829 * enable transmit and receive 1830 */ 1831 msci_write_1(scp, SCA_CMD0, SCA_CMD_TXENABLE); 1832 msci_write_1(scp, SCA_CMD0, SCA_CMD_RXENABLE); 1833 1834 /* 1835 * reset internal state 1836 */ 1837 scp->sp_txinuse = 0; 1838 scp->sp_txcur = 0; 1839 getmicrotime(&now); 1840 scp->cka_lasttx = now.tv_usec; 1841 scp->cka_lastrx = 0; 1842 } 1843 1844 /* 1845 * set a port to the "down" state 1846 */ 1847 static void 1848 sca_port_down(sca_port_t *scp) 1849 { 1850 struct sca_softc *sc = scp->sca; 1851 #if 0 1852 u_int8_t ier0, ier1; 1853 #endif 1854 1855 /* 1856 * lower DTR 1857 */ 1858 sc->sc_dtr_callback(sc->sc_aux, scp->sp_port, 0); 1859 1860 /* 1861 * lower RTS 1862 */ 1863 msci_write_1(scp, SCA_CTL0, 1864 (msci_read_1(scp, SCA_CTL0) & ~SCA_CTL_RTS_MASK) 1865 | SCA_CTL_RTS_LOW); 1866 1867 /* 1868 * disable interrupts 1869 */ 1870 #if 0 1871 ier0 = SCA_IER0_MSCI_RXRDY0 | SCA_IER0_MSCI_TXRDY0 1872 | SCA_IER0_MSCI_RXINT0 | SCA_IER0_MSCI_TXINT0; 1873 ier1 = SCA_IER1_DMAC_RX0A | SCA_IER1_DMAC_RX0B 1874 | SCA_IER1_DMAC_TX0A | SCA_IER1_DMAC_TX0B; 1875 if (scp->sp_port == 1) { 1876 ier0 <<= 4; 1877 ier1 <<= 4; 1878 } 1879 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) & ~ier0); 1880 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) & ~ier1); 1881 #else 1882 if (scp->sp_port == 0) { 1883 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) & 0xf0); 1884 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) & 0xf0); 1885 } else { 1886 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) & 0x0f); 1887 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) & 0x0f); 1888 } 1889 #endif 1890 1891 /* 1892 * disable transmit and receive 1893 */ 1894 msci_write_1(scp, SCA_CMD0, SCA_CMD_RXDISABLE); 1895 msci_write_1(scp, SCA_CMD0, SCA_CMD_TXDISABLE); 1896 1897 /* 1898 * no, we're not in use anymore 1899 */ 1900 scp->sp_if.if_flags &= ~(IFF_OACTIVE|IFF_RUNNING); 1901 } 1902 1903 /* 1904 * disable all DMA and interrupts for all ports at once. 1905 */ 1906 void 1907 sca_shutdown(struct sca_softc *sca) 1908 { 1909 /* 1910 * disable DMA and interrupts 1911 */ 1912 sca_write_1(sca, SCA_DMER, 0); 1913 sca_write_1(sca, SCA_IER0, 0); 1914 sca_write_1(sca, SCA_IER1, 0); 1915 } 1916 1917 /* 1918 * If there are packets to transmit, start the transmit DMA logic. 1919 */ 1920 static void 1921 sca_port_starttx(sca_port_t *scp) 1922 { 1923 u_int32_t startdesc_p, enddesc_p; 1924 int enddesc; 1925 1926 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: starttx\n")); 1927 1928 if (((scp->sp_if.if_flags & IFF_OACTIVE) == IFF_OACTIVE) 1929 || scp->sp_txinuse == 0) 1930 return; 1931 1932 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: setting oactive\n")); 1933 1934 scp->sp_if.if_flags |= IFF_OACTIVE; 1935 1936 /* 1937 * We have something to do, since we have at least one packet 1938 * waiting, and we are not already marked as active. 1939 */ 1940 enddesc = (scp->sp_txcur + 1) % scp->sp_ntxdesc; 1941 startdesc_p = scp->sp_txdesc_p; 1942 enddesc_p = scp->sp_txdesc_p + sizeof(sca_desc_t) * enddesc; 1943 1944 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: start %x end %x\n", 1945 startdesc_p, enddesc_p)); 1946 1947 dmac_write_2(scp, SCA_EDAL1, (u_int16_t)(enddesc_p & 0x0000ffff)); 1948 dmac_write_2(scp, SCA_CDAL1, 1949 (u_int16_t)(startdesc_p & 0x0000ffff)); 1950 1951 /* 1952 * enable the DMA 1953 */ 1954 dmac_write_1(scp, SCA_DSR1, SCA_DSR_DE); 1955 } 1956 1957 /* 1958 * allocate an mbuf at least long enough to hold "len" bytes. 1959 * If "p" is non-NULL, copy "len" bytes from it into the new mbuf, 1960 * otherwise let the caller handle copying the data in. 1961 */ 1962 static struct mbuf * 1963 sca_mbuf_alloc(struct sca_softc *sc, void *p, u_int len) 1964 { 1965 struct mbuf *m; 1966 1967 /* 1968 * allocate an mbuf and copy the important bits of data 1969 * into it. If the packet won't fit in the header, 1970 * allocate a cluster for it and store it there. 1971 */ 1972 MGETHDR(m, M_DONTWAIT, MT_DATA); 1973 if (m == NULL) 1974 return NULL; 1975 if (len > MHLEN) { 1976 if (len > MCLBYTES) { 1977 m_freem(m); 1978 return NULL; 1979 } 1980 MCLGET(m, M_DONTWAIT); 1981 if ((m->m_flags & M_EXT) == 0) { 1982 m_freem(m); 1983 return NULL; 1984 } 1985 } 1986 if (p != NULL) { 1987 /* XXX do we need to sync here? */ 1988 if (sc->sc_usedma) 1989 memcpy(mtod(m, void *), p, len); 1990 else 1991 bus_space_read_region_1(sc->scu_memt, sc->scu_memh, 1992 sca_page_addr(sc, p), mtod(m, u_int8_t *), len); 1993 } 1994 m->m_len = len; 1995 m->m_pkthdr.len = len; 1996 1997 return (m); 1998 } 1999 2000 /* 2001 * get the base clock 2002 */ 2003 void 2004 sca_get_base_clock(struct sca_softc *sc) 2005 { 2006 struct timeval btv, ctv, dtv; 2007 u_int64_t bcnt; 2008 u_int32_t cnt; 2009 u_int16_t subcnt; 2010 2011 /* disable the timer, set prescale to 0 */ 2012 sca_write_1(sc, SCA_TCSR0, 0); 2013 sca_write_1(sc, SCA_TEPR0, 0); 2014 2015 /* reset the counter */ 2016 (void)sca_read_1(sc, SCA_TCSR0); 2017 subcnt = sca_read_2(sc, SCA_TCNTL0); 2018 2019 /* count to max */ 2020 sca_write_2(sc, SCA_TCONRL0, 0xffff); 2021 2022 cnt = 0; 2023 microtime(&btv); 2024 /* start the timer -- no interrupt enable */ 2025 sca_write_1(sc, SCA_TCSR0, SCA_TCSR_TME); 2026 for (;;) { 2027 microtime(&ctv); 2028 2029 /* end around 3/4 of a second */ 2030 timersub(&ctv, &btv, &dtv); 2031 if (dtv.tv_usec >= 750000) 2032 break; 2033 2034 /* spin */ 2035 while (!(sca_read_1(sc, SCA_TCSR0) & SCA_TCSR_CMF)) 2036 ; 2037 /* reset the timer */ 2038 (void)sca_read_2(sc, SCA_TCNTL0); 2039 cnt++; 2040 } 2041 2042 /* stop the timer */ 2043 sca_write_1(sc, SCA_TCSR0, 0); 2044 2045 subcnt = sca_read_2(sc, SCA_TCNTL0); 2046 /* add the slop in and get the total timer ticks */ 2047 cnt = (cnt << 16) | subcnt; 2048 2049 /* cnt is 1/8 the actual time */ 2050 bcnt = cnt * 8; 2051 /* make it proportional to 3/4 of a second */ 2052 bcnt *= (u_int64_t)750000; 2053 bcnt /= (u_int64_t)dtv.tv_usec; 2054 cnt = bcnt; 2055 2056 /* make it Hz */ 2057 cnt *= 4; 2058 cnt /= 3; 2059 2060 SCA_DPRINTF(SCA_DEBUG_CLOCK, 2061 ("sca: unadjusted base %lu Hz\n", (u_long)cnt)); 2062 2063 /* 2064 * round to the nearest 200 -- this allows for +-3 ticks error 2065 */ 2066 sc->sc_baseclock = ((cnt + 100) / 200) * 200; 2067 } 2068 2069 /* 2070 * print the information about the clock on the ports 2071 */ 2072 void 2073 sca_print_clock_info(struct sca_softc *sc) 2074 { 2075 struct sca_port *scp; 2076 u_int32_t mhz, div; 2077 int i; 2078 2079 printf("%s: base clock %d Hz\n", device_xname(sc->sc_parent), 2080 sc->sc_baseclock); 2081 2082 /* print the information about the port clock selection */ 2083 for (i = 0; i < sc->sc_numports; i++) { 2084 scp = &sc->sc_ports[i]; 2085 mhz = sc->sc_baseclock / (scp->sp_tmc ? scp->sp_tmc : 256); 2086 div = scp->sp_rxs & SCA_RXS_DIV_MASK; 2087 2088 printf("%s: rx clock: ", scp->sp_if.if_xname); 2089 switch (scp->sp_rxs & SCA_RXS_CLK_MASK) { 2090 case SCA_RXS_CLK_LINE: 2091 printf("line"); 2092 break; 2093 case SCA_RXS_CLK_LINE_SN: 2094 printf("line with noise suppression"); 2095 break; 2096 case SCA_RXS_CLK_INTERNAL: 2097 printf("internal %d Hz", (mhz >> div)); 2098 break; 2099 case SCA_RXS_CLK_ADPLL_OUT: 2100 printf("adpll using internal %d Hz", (mhz >> div)); 2101 break; 2102 case SCA_RXS_CLK_ADPLL_IN: 2103 printf("adpll using line clock"); 2104 break; 2105 } 2106 printf(" tx clock: "); 2107 div = scp->sp_txs & SCA_TXS_DIV_MASK; 2108 switch (scp->sp_txs & SCA_TXS_CLK_MASK) { 2109 case SCA_TXS_CLK_LINE: 2110 printf("line\n"); 2111 break; 2112 case SCA_TXS_CLK_INTERNAL: 2113 printf("internal %d Hz\n", (mhz >> div)); 2114 break; 2115 case SCA_TXS_CLK_RXCLK: 2116 printf("rxclock\n"); 2117 break; 2118 } 2119 if (scp->sp_eclock) 2120 printf("%s: outputting line clock\n", 2121 scp->sp_if.if_xname); 2122 } 2123 } 2124 2125