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sys/dev/ic/hd64570.c
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1 /* $NetBSD: hd64570.c,v 1.57 2022/09/03 02:48:00 thorpej 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 1.57 2022/09/03 02:48:00 thorpej 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 intrerrupt 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(nsr, if_oerrors); 883 if_statinc_ref(nsr, if_collisions); 884 IF_STAT_PUTREF(ifp); 885 splx(s); 886 return (error); 887 } 888 if_statadd_ref(nsr, if_obytes, len); 889 if (mflags & M_MCAST) 890 if_statinc_ref(nsr, if_omcasts); 891 IF_STAT_PUTREF(ifp); 892 893 sca_start(ifp); 894 splx(s); 895 896 return (error); 897 898 bad: 899 if (m) 900 m_freem(m); 901 return (error); 902 } 903 904 static int 905 sca_ioctl(struct ifnet *ifp, u_long cmd, void *data) 906 { 907 struct ifreq *ifr; 908 struct ifaddr *ifa; 909 int error; 910 int s; 911 912 s = splnet(); 913 914 ifr = (struct ifreq *)data; 915 ifa = (struct ifaddr *)data; 916 error = 0; 917 918 switch (cmd) { 919 case SIOCINITIFADDR: 920 switch(ifa->ifa_addr->sa_family) { 921 #ifdef INET 922 case AF_INET: 923 #endif 924 #ifdef INET6 925 case AF_INET6: 926 #endif 927 #if defined(INET) || defined(INET6) 928 ifp->if_flags |= IFF_UP; 929 sca_port_up(ifp->if_softc); 930 break; 931 #endif 932 default: 933 error = EAFNOSUPPORT; 934 break; 935 } 936 break; 937 938 case SIOCSIFDSTADDR: 939 #ifdef INET 940 if (ifa->ifa_addr->sa_family == AF_INET) 941 break; 942 #endif 943 #ifdef INET6 944 if (ifa->ifa_addr->sa_family == AF_INET6) 945 break; 946 #endif 947 error = EAFNOSUPPORT; 948 break; 949 950 case SIOCADDMULTI: 951 case SIOCDELMULTI: 952 /* XXX need multicast group management code */ 953 if (ifr == 0) { 954 error = EAFNOSUPPORT; /* XXX */ 955 break; 956 } 957 switch (ifreq_getaddr(cmd, ifr)->sa_family) { 958 #ifdef INET 959 case AF_INET: 960 break; 961 #endif 962 #ifdef INET6 963 case AF_INET6: 964 break; 965 #endif 966 default: 967 error = EAFNOSUPPORT; 968 break; 969 } 970 break; 971 972 case SIOCSIFFLAGS: 973 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 974 break; 975 if (ifr->ifr_flags & IFF_UP) { 976 ifp->if_flags |= IFF_UP; 977 sca_port_up(ifp->if_softc); 978 } else { 979 ifp->if_flags &= ~IFF_UP; 980 sca_port_down(ifp->if_softc); 981 } 982 983 break; 984 985 default: 986 error = ifioctl_common(ifp, cmd, data); 987 } 988 989 splx(s); 990 return error; 991 } 992 993 /* 994 * start packet transmission on the interface 995 * 996 * MUST BE CALLED AT splnet() 997 */ 998 static void 999 sca_start(struct ifnet *ifp) 1000 { 1001 sca_port_t *scp = ifp->if_softc; 1002 struct sca_softc *sc = scp->sca; 1003 struct mbuf *m, *mb_head; 1004 sca_desc_t *desc; 1005 u_int8_t *buf, stat; 1006 u_int32_t buf_p; 1007 int nexttx; 1008 int trigger_xmit; 1009 u_int len; 1010 1011 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: enter start\n")); 1012 1013 /* 1014 * can't queue when we are full or transmitter is busy 1015 */ 1016 #ifdef oldcode 1017 if ((scp->sp_txinuse >= (scp->sp_ntxdesc - 1)) 1018 || ((ifp->if_flags & IFF_OACTIVE) == IFF_OACTIVE)) 1019 return; 1020 #else 1021 if (scp->sp_txinuse 1022 || ((ifp->if_flags & IFF_OACTIVE) == IFF_OACTIVE)) 1023 return; 1024 #endif 1025 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: txinuse %d\n", scp->sp_txinuse)); 1026 1027 /* 1028 * XXX assume that all tx desc and bufs in same page 1029 */ 1030 if (sc->sc_usedma) 1031 bus_dmamap_sync(sc->scu_dmat, sc->scu_dmam, 1032 0, sc->scu_allocsize, 1033 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1034 else { 1035 sc->scu_page_on(sc); 1036 sc->scu_set_page(sc, scp->sp_txdesc_p); 1037 } 1038 1039 trigger_xmit = 0; 1040 1041 txloop: 1042 IF_DEQUEUE(&scp->linkq, mb_head); 1043 if (mb_head == NULL) 1044 #ifdef SCA_USE_FASTQ 1045 IF_DEQUEUE(&scp->fastq, mb_head); 1046 if (mb_head == NULL) 1047 #endif 1048 IFQ_DEQUEUE(&ifp->if_snd, mb_head); 1049 if (mb_head == NULL) 1050 goto start_xmit; 1051 1052 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: got mbuf\n")); 1053 #ifdef oldcode 1054 if (scp->txinuse != 0) { 1055 /* Kill EOT interrupts on the previous descriptor. */ 1056 desc = &scp->sp_txdesc[scp->txcur]; 1057 stat = sca_desc_read_stat(sc, desc); 1058 sca_desc_write_stat(sc, desc, stat & ~SCA_DESC_EOT); 1059 1060 /* Figure out what the next free descriptor is. */ 1061 nexttx = (scp->sp_txcur + 1) % scp->sp_ntxdesc; 1062 } else 1063 nexttx = 0; 1064 #endif /* oldcode */ 1065 1066 if (scp->sp_txinuse) 1067 nexttx = (scp->sp_txcur + 1) % scp->sp_ntxdesc; 1068 else 1069 nexttx = 0; 1070 1071 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: nexttx %d\n", nexttx)); 1072 1073 buf = scp->sp_txbuf + SCA_BSIZE * nexttx; 1074 buf_p = scp->sp_txbuf_p + SCA_BSIZE * nexttx; 1075 1076 /* XXX hoping we can delay the desc write till after we don't drop. */ 1077 desc = &scp->sp_txdesc[nexttx]; 1078 1079 /* XXX isn't this set already?? */ 1080 sca_desc_write_bufp(sc, desc, buf_p); 1081 len = 0; 1082 1083 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: buf %x buf_p %x\n", (u_int)buf, buf_p)); 1084 1085 #if 0 /* uncomment this for a core in cc1 */ 1086 X 1087 #endif 1088 /* 1089 * Run through the chain, copying data into the descriptor as we 1090 * go. If it won't fit in one transmission block, drop the packet. 1091 * No, this isn't nice, but most of the time it _will_ fit. 1092 */ 1093 for (m = mb_head ; m != NULL ; m = m->m_next) { 1094 if (m->m_len != 0) { 1095 len += m->m_len; 1096 if (len > SCA_BSIZE) { 1097 m_freem(mb_head); 1098 goto txloop; 1099 } 1100 SCA_DPRINTF(SCA_DEBUG_TX, 1101 ("TX: about to mbuf len %d\n", m->m_len)); 1102 1103 if (sc->sc_usedma) 1104 memcpy(buf, mtod(m, u_int8_t *), m->m_len); 1105 else 1106 bus_space_write_region_1(sc->scu_memt, 1107 sc->scu_memh, sca_page_addr(sc, buf_p), 1108 mtod(m, u_int8_t *), m->m_len); 1109 buf += m->m_len; 1110 buf_p += m->m_len; 1111 } 1112 } 1113 1114 /* set the buffer, the length, and mark end of frame and end of xfer */ 1115 sca_desc_write_buflen(sc, desc, len); 1116 sca_desc_write_stat(sc, desc, SCA_DESC_EOM); 1117 1118 if_statinc(ifp, if_opackets); 1119 1120 /* 1121 * Pass packet to bpf if there is a listener. 1122 */ 1123 bpf_mtap(ifp, mb_head, BPF_D_OUT); 1124 1125 m_freem(mb_head); 1126 1127 scp->sp_txcur = nexttx; 1128 scp->sp_txinuse++; 1129 trigger_xmit = 1; 1130 1131 SCA_DPRINTF(SCA_DEBUG_TX, 1132 ("TX: inuse %d index %d\n", scp->sp_txinuse, scp->sp_txcur)); 1133 1134 /* 1135 * XXX so didn't this used to limit us to 1?! - multi may be untested 1136 * sp_ntxdesc used to be hard coded to 2 with claim of a too hard 1137 * to find bug 1138 */ 1139 #ifdef oldcode 1140 if (scp->sp_txinuse < (scp->sp_ntxdesc - 1)) 1141 #endif 1142 if (scp->sp_txinuse < scp->sp_ntxdesc) 1143 goto txloop; 1144 1145 start_xmit: 1146 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: trigger_xmit %d\n", trigger_xmit)); 1147 1148 if (trigger_xmit != 0) { 1149 /* set EOT on final descriptor */ 1150 desc = &scp->sp_txdesc[scp->sp_txcur]; 1151 stat = sca_desc_read_stat(sc, desc); 1152 sca_desc_write_stat(sc, desc, stat | SCA_DESC_EOT); 1153 } 1154 1155 if (sc->sc_usedma) 1156 bus_dmamap_sync(sc->scu_dmat, sc->scu_dmam, 0, 1157 sc->scu_allocsize, 1158 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1159 1160 if (trigger_xmit != 0) 1161 sca_port_starttx(scp); 1162 1163 if (!sc->sc_usedma) 1164 sc->scu_page_off(sc); 1165 } 1166 1167 static void 1168 sca_watchdog(struct ifnet *ifp) 1169 { 1170 } 1171 1172 int 1173 sca_hardintr(struct sca_softc *sc) 1174 { 1175 u_int8_t isr0, isr1, isr2; 1176 int ret; 1177 1178 ret = 0; /* non-zero means we processed at least one interrupt */ 1179 1180 SCA_DPRINTF(SCA_DEBUG_INTR, ("sca_hardintr entered\n")); 1181 1182 while (1) { 1183 /* 1184 * read SCA interrupts 1185 */ 1186 isr0 = sca_read_1(sc, SCA_ISR0); 1187 isr1 = sca_read_1(sc, SCA_ISR1); 1188 isr2 = sca_read_1(sc, SCA_ISR2); 1189 1190 if (isr0 == 0 && isr1 == 0 && isr2 == 0) 1191 break; 1192 1193 SCA_DPRINTF(SCA_DEBUG_INTR, 1194 ("isr0 = %02x, isr1 = %02x, isr2 = %02x\n", 1195 isr0, isr1, isr2)); 1196 1197 /* 1198 * check DMAC interrupt 1199 */ 1200 if (isr1 & 0x0f) 1201 ret += sca_dmac_intr(&sc->sc_ports[0], 1202 isr1 & 0x0f); 1203 1204 if (isr1 & 0xf0) 1205 ret += sca_dmac_intr(&sc->sc_ports[1], 1206 (isr1 & 0xf0) >> 4); 1207 1208 /* 1209 * mcsi intterupts 1210 */ 1211 if (isr0 & 0x0f) 1212 ret += sca_msci_intr(&sc->sc_ports[0], isr0 & 0x0f); 1213 1214 if (isr0 & 0xf0) 1215 ret += sca_msci_intr(&sc->sc_ports[1], 1216 (isr0 & 0xf0) >> 4); 1217 1218 #if 0 /* We don't GET timer interrupts, we have them disabled (msci IE20) */ 1219 if (isr2) 1220 ret += sca_timer_intr(sc, isr2); 1221 #endif 1222 } 1223 1224 return (ret); 1225 } 1226 1227 static int 1228 sca_dmac_intr(sca_port_t *scp, u_int8_t isr) 1229 { 1230 u_int8_t dsr; 1231 int ret; 1232 1233 ret = 0; 1234 1235 /* 1236 * Check transmit channel 1237 */ 1238 if (isr & (SCA_ISR1_DMAC_TX0A | SCA_ISR1_DMAC_TX0B)) { 1239 SCA_DPRINTF(SCA_DEBUG_INTR, 1240 ("TX INTERRUPT port %d\n", scp->sp_port)); 1241 1242 dsr = 1; 1243 while (dsr != 0) { 1244 ret++; 1245 /* 1246 * reset interrupt 1247 */ 1248 dsr = dmac_read_1(scp, SCA_DSR1); 1249 dmac_write_1(scp, SCA_DSR1, 1250 dsr | SCA_DSR_DEWD); 1251 1252 /* 1253 * filter out the bits we don't care about 1254 */ 1255 dsr &= ( SCA_DSR_COF | SCA_DSR_BOF | SCA_DSR_EOT); 1256 if (dsr == 0) 1257 break; 1258 1259 /* 1260 * check for counter overflow 1261 */ 1262 if (dsr & SCA_DSR_COF) { 1263 printf("%s: TXDMA counter overflow\n", 1264 scp->sp_if.if_xname); 1265 1266 scp->sp_if.if_flags &= ~IFF_OACTIVE; 1267 scp->sp_txcur = 0; 1268 scp->sp_txinuse = 0; 1269 } 1270 1271 /* 1272 * check for buffer overflow 1273 */ 1274 if (dsr & SCA_DSR_BOF) { 1275 printf("%s: TXDMA buffer overflow, cda 0x%04x, eda 0x%04x, cpb 0x%02x\n", 1276 scp->sp_if.if_xname, 1277 dmac_read_2(scp, SCA_CDAL1), 1278 dmac_read_2(scp, SCA_EDAL1), 1279 dmac_read_1(scp, SCA_CPB1)); 1280 1281 /* 1282 * Yikes. Arrange for a full 1283 * transmitter restart. 1284 */ 1285 scp->sp_if.if_flags &= ~IFF_OACTIVE; 1286 scp->sp_txcur = 0; 1287 scp->sp_txinuse = 0; 1288 } 1289 1290 /* 1291 * check for end of transfer, which is not 1292 * an error. It means that all data queued 1293 * was transmitted, and we mark ourself as 1294 * not in use and stop the watchdog timer. 1295 */ 1296 if (dsr & SCA_DSR_EOT) { 1297 SCA_DPRINTF(SCA_DEBUG_TX, 1298 ("Transmit completed. cda %x eda %x dsr %x\n", 1299 dmac_read_2(scp, SCA_CDAL1), 1300 dmac_read_2(scp, SCA_EDAL1), 1301 dsr)); 1302 1303 scp->sp_if.if_flags &= ~IFF_OACTIVE; 1304 scp->sp_txcur = 0; 1305 scp->sp_txinuse = 0; 1306 1307 /* 1308 * check for more packets 1309 */ 1310 if_schedule_deferred_start(&scp->sp_if); 1311 } 1312 } 1313 } 1314 /* 1315 * receive channel check 1316 */ 1317 if (isr & (SCA_ISR1_DMAC_RX0A | SCA_ISR1_DMAC_RX0B)) { 1318 SCA_DPRINTF(SCA_DEBUG_INTR, ("RX INTERRUPT port %d\n", 1319 (scp == &scp->sca->sc_ports[0] ? 0 : 1))); 1320 1321 dsr = 1; 1322 while (dsr != 0) { 1323 ret++; 1324 1325 dsr = dmac_read_1(scp, SCA_DSR0); 1326 dmac_write_1(scp, SCA_DSR0, dsr | SCA_DSR_DEWD); 1327 1328 /* 1329 * filter out the bits we don't care about 1330 */ 1331 dsr &= (SCA_DSR_EOM | SCA_DSR_COF 1332 | SCA_DSR_BOF | SCA_DSR_EOT); 1333 if (dsr == 0) 1334 break; 1335 1336 /* 1337 * End of frame 1338 */ 1339 if (dsr & SCA_DSR_EOM) { 1340 SCA_DPRINTF(SCA_DEBUG_RX, ("Got a frame!\n")); 1341 1342 sca_get_packets(scp); 1343 } 1344 1345 /* 1346 * check for counter overflow 1347 */ 1348 if (dsr & SCA_DSR_COF) { 1349 printf("%s: RXDMA counter overflow\n", 1350 scp->sp_if.if_xname); 1351 1352 sca_dmac_rxinit(scp); 1353 } 1354 1355 /* 1356 * check for end of transfer, which means we 1357 * ran out of descriptors to receive into. 1358 * This means the line is much faster than 1359 * we can handle. 1360 */ 1361 if (dsr & (SCA_DSR_BOF | SCA_DSR_EOT)) { 1362 printf("%s: RXDMA buffer overflow\n", 1363 scp->sp_if.if_xname); 1364 1365 sca_dmac_rxinit(scp); 1366 } 1367 } 1368 } 1369 1370 return ret; 1371 } 1372 1373 static int 1374 sca_msci_intr(sca_port_t *scp, u_int8_t isr) 1375 { 1376 u_int8_t st1, trc0; 1377 1378 /* get and clear the specific interrupt -- should act on it :)*/ 1379 if ((st1 = msci_read_1(scp, SCA_ST10))) { 1380 /* clear the interrupt */ 1381 msci_write_1(scp, SCA_ST10, st1); 1382 1383 if (st1 & SCA_ST1_UDRN) { 1384 /* underrun -- try to increase ready control */ 1385 trc0 = msci_read_1(scp, SCA_TRC00); 1386 if (trc0 == 0x1f) 1387 printf("TX: underrun - fifo depth maxed\n"); 1388 else { 1389 if ((trc0 += 2) > 0x1f) 1390 trc0 = 0x1f; 1391 SCA_DPRINTF(SCA_DEBUG_TX, 1392 ("TX: udrn - incr fifo to %d\n", trc0)); 1393 msci_write_1(scp, SCA_TRC00, trc0); 1394 } 1395 } 1396 } 1397 return (0); 1398 } 1399 1400 static void 1401 sca_get_packets(sca_port_t *scp) 1402 { 1403 struct sca_softc *sc; 1404 1405 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: sca_get_packets\n")); 1406 1407 sc = scp->sca; 1408 if (sc->sc_usedma) 1409 bus_dmamap_sync(sc->scu_dmat, sc->scu_dmam, 1410 0, sc->scu_allocsize, 1411 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1412 else { 1413 /* 1414 * XXX this code is unable to deal with rx stuff 1415 * in more than 1 page 1416 */ 1417 sc->scu_page_on(sc); 1418 sc->scu_set_page(sc, scp->sp_rxdesc_p); 1419 } 1420 1421 /* process as many frames as are available */ 1422 while (sca_frame_avail(scp)) { 1423 sca_frame_process(scp); 1424 sca_frame_read_done(scp); 1425 } 1426 1427 if (sc->sc_usedma) 1428 bus_dmamap_sync(sc->scu_dmat, sc->scu_dmam, 1429 0, sc->scu_allocsize, 1430 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1431 else 1432 sc->scu_page_off(sc); 1433 } 1434 1435 /* 1436 * Starting with the first descriptor we wanted to read into, up to but 1437 * not including the current SCA read descriptor, look for a packet. 1438 * 1439 * must be called at splnet() 1440 */ 1441 static int 1442 sca_frame_avail(sca_port_t *scp) 1443 { 1444 u_int16_t cda; 1445 u_int32_t desc_p; /* physical address (lower 16 bits) */ 1446 sca_desc_t *desc; 1447 u_int8_t rxstat; 1448 int cdaidx, toolong; 1449 1450 /* 1451 * Read the current descriptor from the SCA. 1452 */ 1453 cda = dmac_read_2(scp, SCA_CDAL0); 1454 1455 /* 1456 * calculate the index of the current descriptor 1457 */ 1458 desc_p = (scp->sp_rxdesc_p & 0xFFFF); 1459 desc_p = cda - desc_p; 1460 cdaidx = desc_p / sizeof(sca_desc_t); 1461 1462 SCA_DPRINTF(SCA_DEBUG_RX, 1463 ("RX: cda %x desc_p %x cdaidx %u, nrxdesc %d rxstart %d\n", 1464 cda, desc_p, cdaidx, scp->sp_nrxdesc, scp->sp_rxstart)); 1465 1466 /* note confusion */ 1467 if (cdaidx >= scp->sp_nrxdesc) 1468 panic("current descriptor index out of range"); 1469 1470 /* see if we have a valid frame available */ 1471 toolong = 0; 1472 for (; scp->sp_rxstart != cdaidx; sca_frame_read_done(scp)) { 1473 /* 1474 * We might have a valid descriptor. Set up a pointer 1475 * to the kva address for it so we can more easily examine 1476 * the contents. 1477 */ 1478 desc = &scp->sp_rxdesc[scp->sp_rxstart]; 1479 rxstat = sca_desc_read_stat(scp->sca, desc); 1480 1481 SCA_DPRINTF(SCA_DEBUG_RX, ("port %d RX: idx %d rxstat %x\n", 1482 scp->sp_port, scp->sp_rxstart, rxstat)); 1483 1484 SCA_DPRINTF(SCA_DEBUG_RX, ("port %d RX: buflen %d\n", 1485 scp->sp_port, sca_desc_read_buflen(scp->sca, desc))); 1486 1487 /* 1488 * check for errors 1489 */ 1490 if (rxstat & SCA_DESC_ERRORS) { 1491 /* 1492 * consider an error condition the end 1493 * of a frame 1494 */ 1495 if_statinc(&scp->sp_if, if_ierrors); 1496 toolong = 0; 1497 continue; 1498 } 1499 1500 /* 1501 * if we aren't skipping overlong frames 1502 * we are done, otherwise reset and look for 1503 * another good frame 1504 */ 1505 if (rxstat & SCA_DESC_EOM) { 1506 if (!toolong) 1507 return (1); 1508 toolong = 0; 1509 } else if (!toolong) { 1510 /* 1511 * we currently don't deal with frames 1512 * larger than a single buffer (fixed MTU) 1513 */ 1514 if_statinc(&scp->sp_if, if_ierrors); 1515 toolong = 1; 1516 } 1517 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: idx %d no EOM\n", 1518 scp->sp_rxstart)); 1519 } 1520 1521 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: returning none\n")); 1522 return 0; 1523 } 1524 1525 /* 1526 * Pass the packet up to the kernel if it is a packet we want to pay 1527 * attention to. 1528 * 1529 * MUST BE CALLED AT splnet() 1530 */ 1531 static void 1532 sca_frame_process(sca_port_t *scp) 1533 { 1534 pktqueue_t *pktq = NULL; 1535 struct hdlc_header *hdlc; 1536 struct cisco_pkt *cisco; 1537 sca_desc_t *desc; 1538 struct mbuf *m; 1539 u_int8_t *bufp; 1540 u_int16_t len; 1541 u_int32_t t; 1542 1543 t = time_uptime * 1000; 1544 desc = &scp->sp_rxdesc[scp->sp_rxstart]; 1545 bufp = scp->sp_rxbuf + SCA_BSIZE * scp->sp_rxstart; 1546 len = sca_desc_read_buflen(scp->sca, desc); 1547 1548 SCA_DPRINTF(SCA_DEBUG_RX, 1549 ("RX: desc %lx bufp %lx len %d\n", (bus_addr_t)desc, 1550 (bus_addr_t)bufp, len)); 1551 1552 #if SCA_DEBUG_LEVEL > 0 1553 if (sca_debug & SCA_DEBUG_RXPKT) 1554 sca_frame_print(scp, desc, bufp); 1555 #endif 1556 /* 1557 * skip packets that are too short 1558 */ 1559 if (len < sizeof(struct hdlc_header)) { 1560 if_statinc(&scp->sp_if, if_ierrors); 1561 return; 1562 } 1563 1564 m = sca_mbuf_alloc(scp->sca, bufp, len); 1565 if (m == NULL) { 1566 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: no mbuf!\n")); 1567 return; 1568 } 1569 1570 /* 1571 * read and then strip off the HDLC information 1572 */ 1573 m = m_pullup(m, sizeof(struct hdlc_header)); 1574 if (m == NULL) { 1575 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: no m_pullup!\n")); 1576 return; 1577 } 1578 1579 bpf_mtap_softint(&scp->sp_if, m); 1580 1581 if_statinc(&scp->sp_if, if_ipackets); 1582 1583 hdlc = mtod(m, struct hdlc_header *); 1584 switch (ntohs(hdlc->h_proto)) { 1585 #ifdef INET 1586 case HDLC_PROTOCOL_IP: 1587 SCA_DPRINTF(SCA_DEBUG_RX, ("Received IP packet\n")); 1588 m_set_rcvif(m, &scp->sp_if); 1589 m->m_pkthdr.len -= sizeof(struct hdlc_header); 1590 m->m_data += sizeof(struct hdlc_header); 1591 m->m_len -= sizeof(struct hdlc_header); 1592 pktq = ip_pktq; 1593 break; 1594 #endif /* INET */ 1595 #ifdef INET6 1596 case HDLC_PROTOCOL_IPV6: 1597 SCA_DPRINTF(SCA_DEBUG_RX, ("Received IP packet\n")); 1598 m_set_rcvif(m, &scp->sp_if); 1599 m->m_pkthdr.len -= sizeof(struct hdlc_header); 1600 m->m_data += sizeof(struct hdlc_header); 1601 m->m_len -= sizeof(struct hdlc_header); 1602 pktq = ip6_pktq; 1603 break; 1604 #endif /* INET6 */ 1605 case CISCO_KEEPALIVE: 1606 SCA_DPRINTF(SCA_DEBUG_CISCO, 1607 ("Received CISCO keepalive packet\n")); 1608 1609 if (len < CISCO_PKT_LEN) { 1610 SCA_DPRINTF(SCA_DEBUG_CISCO, 1611 ("short CISCO packet %d, wanted %d\n", 1612 len, CISCO_PKT_LEN)); 1613 if_statinc(&scp->sp_if, if_ierrors); 1614 goto dropit; 1615 } 1616 1617 m = m_pullup(m, sizeof(struct cisco_pkt)); 1618 if (m == NULL) { 1619 SCA_DPRINTF(SCA_DEBUG_RX, ("RX: no m_pullup!\n")); 1620 return; 1621 } 1622 1623 cisco = (struct cisco_pkt *) 1624 (mtod(m, u_int8_t *) + HDLC_HDRLEN); 1625 m_set_rcvif(m, &scp->sp_if); 1626 1627 switch (ntohl(cisco->type)) { 1628 case CISCO_ADDR_REQ: 1629 printf("Got CISCO addr_req, ignoring\n"); 1630 if_statinc(&scp->sp_if, if_ierrors); 1631 goto dropit; 1632 1633 case CISCO_ADDR_REPLY: 1634 printf("Got CISCO addr_reply, ignoring\n"); 1635 if_statinc(&scp->sp_if, if_ierrors); 1636 goto dropit; 1637 1638 case CISCO_KEEPALIVE_REQ: 1639 1640 SCA_DPRINTF(SCA_DEBUG_CISCO, 1641 ("Received KA, mseq %d," 1642 " yseq %d, rel 0x%04x, t0" 1643 " %04x, t1 %04x\n", 1644 ntohl(cisco->par1), ntohl(cisco->par2), 1645 ntohs(cisco->rel), ntohs(cisco->time0), 1646 ntohs(cisco->time1))); 1647 1648 scp->cka_lastrx = ntohl(cisco->par1); 1649 scp->cka_lasttx++; 1650 1651 /* 1652 * schedule the transmit right here. 1653 */ 1654 cisco->par2 = cisco->par1; 1655 cisco->par1 = htonl(scp->cka_lasttx); 1656 cisco->time0 = htons((u_int16_t)(t >> 16)); 1657 cisco->time1 = htons((u_int16_t)(t & 0x0000ffff)); 1658 1659 if (IF_QFULL(&scp->linkq)) { 1660 IF_DROP(&scp->linkq); 1661 goto dropit; 1662 } 1663 IF_ENQUEUE(&scp->linkq, m); 1664 1665 sca_start(&scp->sp_if); 1666 1667 /* since start may have reset this fix */ 1668 if (!scp->sca->sc_usedma) { 1669 scp->sca->scu_set_page(scp->sca, 1670 scp->sp_rxdesc_p); 1671 scp->sca->scu_page_on(scp->sca); 1672 } 1673 return; 1674 default: 1675 SCA_DPRINTF(SCA_DEBUG_CISCO, 1676 ("Unknown CISCO keepalive protocol 0x%04x\n", 1677 ntohl(cisco->type))); 1678 1679 if_statinc(&scp->sp_if, if_noproto); 1680 goto dropit; 1681 } 1682 return; 1683 default: 1684 SCA_DPRINTF(SCA_DEBUG_RX, 1685 ("Unknown/unexpected ethertype 0x%04x\n", 1686 ntohs(hdlc->h_proto))); 1687 if_statinc(&scp->sp_if, if_noproto); 1688 goto dropit; 1689 } 1690 1691 /* Queue the packet */ 1692 KASSERT(pktq != NULL); 1693 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 1694 if_statinc(&scp->sp_if, if_iqdrops); 1695 goto dropit; 1696 } 1697 return; 1698 dropit: 1699 if (m) 1700 m_freem(m); 1701 return; 1702 } 1703 1704 #if SCA_DEBUG_LEVEL > 0 1705 /* 1706 * do a hex dump of the packet received into descriptor "desc" with 1707 * data buffer "p" 1708 */ 1709 static void 1710 sca_frame_print(sca_port_t *scp, sca_desc_t *desc, u_int8_t *p) 1711 { 1712 int i; 1713 int nothing_yet = 1; 1714 struct sca_softc *sc; 1715 u_int len; 1716 1717 sc = scp->sca; 1718 printf("desc va %p: chainp 0x%x bufp 0x%0x stat 0x%0x len %d\n", 1719 desc, 1720 sca_desc_read_chainp(sc, desc), 1721 sca_desc_read_bufp(sc, desc), 1722 sca_desc_read_stat(sc, desc), 1723 (len = sca_desc_read_buflen(sc, desc))); 1724 1725 for (i = 0 ; i < len && i < 256; i++) { 1726 if (nothing_yet == 1 && 1727 (sc->sc_usedma ? *p 1728 : bus_space_read_1(sc->scu_memt, sc->scu_memh, 1729 sca_page_addr(sc, p))) == 0) { 1730 p++; 1731 continue; 1732 } 1733 nothing_yet = 0; 1734 if (i % 16 == 0) 1735 printf("\n"); 1736 printf("%02x ", 1737 (sc->sc_usedma ? *p 1738 : bus_space_read_1(sc->scu_memt, sc->scu_memh, 1739 sca_page_addr(sc, p)))); 1740 p++; 1741 } 1742 1743 if (i % 16 != 1) 1744 printf("\n"); 1745 } 1746 #endif 1747 1748 /* 1749 * adjust things because we have just read the current starting 1750 * frame 1751 * 1752 * must be called at splnet() 1753 */ 1754 static void 1755 sca_frame_read_done(sca_port_t *scp) 1756 { 1757 u_int16_t edesc_p; 1758 1759 /* update where our indicies are */ 1760 scp->sp_rxend = scp->sp_rxstart; 1761 scp->sp_rxstart = (scp->sp_rxstart + 1) % scp->sp_nrxdesc; 1762 1763 /* update the error [end] descriptor */ 1764 edesc_p = (u_int16_t)scp->sp_rxdesc_p + 1765 (sizeof(sca_desc_t) * scp->sp_rxend); 1766 dmac_write_2(scp, SCA_EDAL0, edesc_p); 1767 } 1768 1769 /* 1770 * set a port to the "up" state 1771 */ 1772 static void 1773 sca_port_up(sca_port_t *scp) 1774 { 1775 struct sca_softc *sc = scp->sca; 1776 struct timeval now; 1777 #if 0 1778 u_int8_t ier0, ier1; 1779 #endif 1780 1781 /* 1782 * reset things 1783 */ 1784 #if 0 1785 msci_write_1(scp, SCA_CMD0, SCA_CMD_TXRESET); 1786 msci_write_1(scp, SCA_CMD0, SCA_CMD_RXRESET); 1787 #endif 1788 /* 1789 * clear in-use flag 1790 */ 1791 scp->sp_if.if_flags &= ~IFF_OACTIVE; 1792 scp->sp_if.if_flags |= IFF_RUNNING; 1793 1794 /* 1795 * raise DTR 1796 */ 1797 sc->sc_dtr_callback(sc->sc_aux, scp->sp_port, 1); 1798 1799 /* 1800 * raise RTS 1801 */ 1802 msci_write_1(scp, SCA_CTL0, 1803 (msci_read_1(scp, SCA_CTL0) & ~SCA_CTL_RTS_MASK) 1804 | SCA_CTL_RTS_HIGH); 1805 1806 #if 0 1807 /* 1808 * enable interrupts (no timer IER2) 1809 */ 1810 ier0 = SCA_IER0_MSCI_RXRDY0 | SCA_IER0_MSCI_TXRDY0 1811 | SCA_IER0_MSCI_RXINT0 | SCA_IER0_MSCI_TXINT0; 1812 ier1 = SCA_IER1_DMAC_RX0A | SCA_IER1_DMAC_RX0B 1813 | SCA_IER1_DMAC_TX0A | SCA_IER1_DMAC_TX0B; 1814 if (scp->sp_port == 1) { 1815 ier0 <<= 4; 1816 ier1 <<= 4; 1817 } 1818 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) | ier0); 1819 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) | ier1); 1820 #else 1821 if (scp->sp_port == 0) { 1822 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) | 0x0f); 1823 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) | 0x0f); 1824 } else { 1825 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) | 0xf0); 1826 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) | 0xf0); 1827 } 1828 #endif 1829 1830 /* 1831 * enable transmit and receive 1832 */ 1833 msci_write_1(scp, SCA_CMD0, SCA_CMD_TXENABLE); 1834 msci_write_1(scp, SCA_CMD0, SCA_CMD_RXENABLE); 1835 1836 /* 1837 * reset internal state 1838 */ 1839 scp->sp_txinuse = 0; 1840 scp->sp_txcur = 0; 1841 getmicrotime(&now); 1842 scp->cka_lasttx = now.tv_usec; 1843 scp->cka_lastrx = 0; 1844 } 1845 1846 /* 1847 * set a port to the "down" state 1848 */ 1849 static void 1850 sca_port_down(sca_port_t *scp) 1851 { 1852 struct sca_softc *sc = scp->sca; 1853 #if 0 1854 u_int8_t ier0, ier1; 1855 #endif 1856 1857 /* 1858 * lower DTR 1859 */ 1860 sc->sc_dtr_callback(sc->sc_aux, scp->sp_port, 0); 1861 1862 /* 1863 * lower RTS 1864 */ 1865 msci_write_1(scp, SCA_CTL0, 1866 (msci_read_1(scp, SCA_CTL0) & ~SCA_CTL_RTS_MASK) 1867 | SCA_CTL_RTS_LOW); 1868 1869 /* 1870 * disable interrupts 1871 */ 1872 #if 0 1873 ier0 = SCA_IER0_MSCI_RXRDY0 | SCA_IER0_MSCI_TXRDY0 1874 | SCA_IER0_MSCI_RXINT0 | SCA_IER0_MSCI_TXINT0; 1875 ier1 = SCA_IER1_DMAC_RX0A | SCA_IER1_DMAC_RX0B 1876 | SCA_IER1_DMAC_TX0A | SCA_IER1_DMAC_TX0B; 1877 if (scp->sp_port == 1) { 1878 ier0 <<= 4; 1879 ier1 <<= 4; 1880 } 1881 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) & ~ier0); 1882 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) & ~ier1); 1883 #else 1884 if (scp->sp_port == 0) { 1885 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) & 0xf0); 1886 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) & 0xf0); 1887 } else { 1888 sca_write_1(sc, SCA_IER0, sca_read_1(sc, SCA_IER0) & 0x0f); 1889 sca_write_1(sc, SCA_IER1, sca_read_1(sc, SCA_IER1) & 0x0f); 1890 } 1891 #endif 1892 1893 /* 1894 * disable transmit and receive 1895 */ 1896 msci_write_1(scp, SCA_CMD0, SCA_CMD_RXDISABLE); 1897 msci_write_1(scp, SCA_CMD0, SCA_CMD_TXDISABLE); 1898 1899 /* 1900 * no, we're not in use anymore 1901 */ 1902 scp->sp_if.if_flags &= ~(IFF_OACTIVE|IFF_RUNNING); 1903 } 1904 1905 /* 1906 * disable all DMA and interrupts for all ports at once. 1907 */ 1908 void 1909 sca_shutdown(struct sca_softc *sca) 1910 { 1911 /* 1912 * disable DMA and interrupts 1913 */ 1914 sca_write_1(sca, SCA_DMER, 0); 1915 sca_write_1(sca, SCA_IER0, 0); 1916 sca_write_1(sca, SCA_IER1, 0); 1917 } 1918 1919 /* 1920 * If there are packets to transmit, start the transmit DMA logic. 1921 */ 1922 static void 1923 sca_port_starttx(sca_port_t *scp) 1924 { 1925 u_int32_t startdesc_p, enddesc_p; 1926 int enddesc; 1927 1928 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: starttx\n")); 1929 1930 if (((scp->sp_if.if_flags & IFF_OACTIVE) == IFF_OACTIVE) 1931 || scp->sp_txinuse == 0) 1932 return; 1933 1934 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: setting oactive\n")); 1935 1936 scp->sp_if.if_flags |= IFF_OACTIVE; 1937 1938 /* 1939 * We have something to do, since we have at least one packet 1940 * waiting, and we are not already marked as active. 1941 */ 1942 enddesc = (scp->sp_txcur + 1) % scp->sp_ntxdesc; 1943 startdesc_p = scp->sp_txdesc_p; 1944 enddesc_p = scp->sp_txdesc_p + sizeof(sca_desc_t) * enddesc; 1945 1946 SCA_DPRINTF(SCA_DEBUG_TX, ("TX: start %x end %x\n", 1947 startdesc_p, enddesc_p)); 1948 1949 dmac_write_2(scp, SCA_EDAL1, (u_int16_t)(enddesc_p & 0x0000ffff)); 1950 dmac_write_2(scp, SCA_CDAL1, 1951 (u_int16_t)(startdesc_p & 0x0000ffff)); 1952 1953 /* 1954 * enable the DMA 1955 */ 1956 dmac_write_1(scp, SCA_DSR1, SCA_DSR_DE); 1957 } 1958 1959 /* 1960 * allocate an mbuf at least long enough to hold "len" bytes. 1961 * If "p" is non-NULL, copy "len" bytes from it into the new mbuf, 1962 * otherwise let the caller handle copying the data in. 1963 */ 1964 static struct mbuf * 1965 sca_mbuf_alloc(struct sca_softc *sc, void *p, u_int len) 1966 { 1967 struct mbuf *m; 1968 1969 /* 1970 * allocate an mbuf and copy the important bits of data 1971 * into it. If the packet won't fit in the header, 1972 * allocate a cluster for it and store it there. 1973 */ 1974 MGETHDR(m, M_DONTWAIT, MT_DATA); 1975 if (m == NULL) 1976 return NULL; 1977 if (len > MHLEN) { 1978 if (len > MCLBYTES) { 1979 m_freem(m); 1980 return NULL; 1981 } 1982 MCLGET(m, M_DONTWAIT); 1983 if ((m->m_flags & M_EXT) == 0) { 1984 m_freem(m); 1985 return NULL; 1986 } 1987 } 1988 if (p != NULL) { 1989 /* XXX do we need to sync here? */ 1990 if (sc->sc_usedma) 1991 memcpy(mtod(m, void *), p, len); 1992 else 1993 bus_space_read_region_1(sc->scu_memt, sc->scu_memh, 1994 sca_page_addr(sc, p), mtod(m, u_int8_t *), len); 1995 } 1996 m->m_len = len; 1997 m->m_pkthdr.len = len; 1998 1999 return (m); 2000 } 2001 2002 /* 2003 * get the base clock 2004 */ 2005 void 2006 sca_get_base_clock(struct sca_softc *sc) 2007 { 2008 struct timeval btv, ctv, dtv; 2009 u_int64_t bcnt; 2010 u_int32_t cnt; 2011 u_int16_t subcnt; 2012 2013 /* disable the timer, set prescale to 0 */ 2014 sca_write_1(sc, SCA_TCSR0, 0); 2015 sca_write_1(sc, SCA_TEPR0, 0); 2016 2017 /* reset the counter */ 2018 (void)sca_read_1(sc, SCA_TCSR0); 2019 subcnt = sca_read_2(sc, SCA_TCNTL0); 2020 2021 /* count to max */ 2022 sca_write_2(sc, SCA_TCONRL0, 0xffff); 2023 2024 cnt = 0; 2025 microtime(&btv); 2026 /* start the timer -- no interrupt enable */ 2027 sca_write_1(sc, SCA_TCSR0, SCA_TCSR_TME); 2028 for (;;) { 2029 microtime(&ctv); 2030 2031 /* end around 3/4 of a second */ 2032 timersub(&ctv, &btv, &dtv); 2033 if (dtv.tv_usec >= 750000) 2034 break; 2035 2036 /* spin */ 2037 while (!(sca_read_1(sc, SCA_TCSR0) & SCA_TCSR_CMF)) 2038 ; 2039 /* reset the timer */ 2040 (void)sca_read_2(sc, SCA_TCNTL0); 2041 cnt++; 2042 } 2043 2044 /* stop the timer */ 2045 sca_write_1(sc, SCA_TCSR0, 0); 2046 2047 subcnt = sca_read_2(sc, SCA_TCNTL0); 2048 /* add the slop in and get the total timer ticks */ 2049 cnt = (cnt << 16) | subcnt; 2050 2051 /* cnt is 1/8 the actual time */ 2052 bcnt = cnt * 8; 2053 /* make it proportional to 3/4 of a second */ 2054 bcnt *= (u_int64_t)750000; 2055 bcnt /= (u_int64_t)dtv.tv_usec; 2056 cnt = bcnt; 2057 2058 /* make it Hz */ 2059 cnt *= 4; 2060 cnt /= 3; 2061 2062 SCA_DPRINTF(SCA_DEBUG_CLOCK, 2063 ("sca: unadjusted base %lu Hz\n", (u_long)cnt)); 2064 2065 /* 2066 * round to the nearest 200 -- this allows for +-3 ticks error 2067 */ 2068 sc->sc_baseclock = ((cnt + 100) / 200) * 200; 2069 } 2070 2071 /* 2072 * print the information about the clock on the ports 2073 */ 2074 void 2075 sca_print_clock_info(struct sca_softc *sc) 2076 { 2077 struct sca_port *scp; 2078 u_int32_t mhz, div; 2079 int i; 2080 2081 printf("%s: base clock %d Hz\n", device_xname(sc->sc_parent), 2082 sc->sc_baseclock); 2083 2084 /* print the information about the port clock selection */ 2085 for (i = 0; i < sc->sc_numports; i++) { 2086 scp = &sc->sc_ports[i]; 2087 mhz = sc->sc_baseclock / (scp->sp_tmc ? scp->sp_tmc : 256); 2088 div = scp->sp_rxs & SCA_RXS_DIV_MASK; 2089 2090 printf("%s: rx clock: ", scp->sp_if.if_xname); 2091 switch (scp->sp_rxs & SCA_RXS_CLK_MASK) { 2092 case SCA_RXS_CLK_LINE: 2093 printf("line"); 2094 break; 2095 case SCA_RXS_CLK_LINE_SN: 2096 printf("line with noise suppression"); 2097 break; 2098 case SCA_RXS_CLK_INTERNAL: 2099 printf("internal %d Hz", (mhz >> div)); 2100 break; 2101 case SCA_RXS_CLK_ADPLL_OUT: 2102 printf("adpll using internal %d Hz", (mhz >> div)); 2103 break; 2104 case SCA_RXS_CLK_ADPLL_IN: 2105 printf("adpll using line clock"); 2106 break; 2107 } 2108 printf(" tx clock: "); 2109 div = scp->sp_txs & SCA_TXS_DIV_MASK; 2110 switch (scp->sp_txs & SCA_TXS_CLK_MASK) { 2111 case SCA_TXS_CLK_LINE: 2112 printf("line\n"); 2113 break; 2114 case SCA_TXS_CLK_INTERNAL: 2115 printf("internal %d Hz\n", (mhz >> div)); 2116 break; 2117 case SCA_TXS_CLK_RXCLK: 2118 printf("rxclock\n"); 2119 break; 2120 } 2121 if (scp->sp_eclock) 2122 printf("%s: outputting line clock\n", 2123 scp->sp_if.if_xname); 2124 } 2125 } 2126
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