maple.c revision 1.21
1 /* $NetBSD: maple.c,v 1.21 2002/11/15 13:30:21 itohy Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by ITOH Yasufumi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /*- 40 * Copyright (c) 2001 Marcus Comstedt 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Marcus Comstedt. 54 * 4. Neither the name of The NetBSD Foundation nor the names of its 55 * contributors may be used to endorse or promote products derived 56 * from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 59 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 68 * POSSIBILITY OF SUCH DAMAGE. 69 */ 70 71 #include <sys/param.h> 72 #include <sys/device.h> 73 #include <sys/fcntl.h> 74 #include <sys/kernel.h> 75 #include <sys/kthread.h> 76 #include <sys/poll.h> 77 #include <sys/select.h> 78 #include <sys/proc.h> 79 #include <sys/signalvar.h> 80 #include <sys/systm.h> 81 #include <sys/conf.h> 82 83 #include <uvm/uvm_extern.h> 84 85 #include <machine/cpu.h> 86 #include <machine/bus.h> 87 #include <machine/sysasicvar.h> 88 #include <sh3/pmap.h> 89 90 #include <dreamcast/dev/maple/maple.h> 91 #include <dreamcast/dev/maple/mapleconf.h> 92 #include <dreamcast/dev/maple/maplevar.h> 93 #include <dreamcast/dev/maple/maplereg.h> 94 #include <dreamcast/dev/maple/mapleio.h> 95 96 #include "locators.h" 97 98 /* Internal macros, functions, and variables. */ 99 100 #define MAPLE_CALLOUT_TICKS 2 101 102 #define MAPLEBUSUNIT(dev) (minor(dev)>>5) 103 #define MAPLEPORT(dev) ((minor(dev) & 0x18) >> 3) 104 #define MAPLESUBUNIT(dev) (minor(dev) & 0x7) 105 106 /* interrupt priority level */ 107 #define IPL_MAPLE IPL_BIO 108 #define splmaple() splbio() 109 110 /* 111 * Function declarations. 112 */ 113 static int maplematch(struct device *, struct cfdata *, void *); 114 static void mapleattach(struct device *, struct device *, void *); 115 static void maple_create_event_thread(void *); 116 static void maple_scanbus(struct maple_softc *); 117 static char * maple_unit_name(char *, int port, int subunit); 118 static void maple_begin_txbuf(struct maple_softc *); 119 static int maple_end_txbuf(struct maple_softc *); 120 static void maple_queue_command(struct maple_softc *, struct maple_unit *, 121 int command, int datalen, void *dataaddr); 122 static void maple_write_command(struct maple_softc *, struct maple_unit *, 123 int, int, void *); 124 static void maple_start(struct maple_softc *sc); 125 static void maple_start_poll(struct maple_softc *); 126 static void maple_check_subunit_change(struct maple_softc *, 127 struct maple_unit *); 128 static void maple_check_unit_change(struct maple_softc *, 129 struct maple_unit *); 130 static void maple_print_unit(void *, const char *); 131 static int maplesubmatch(struct device *, struct cfdata *, void *); 132 static int mapleprint(void *, const char *); 133 static void maple_attach_unit(struct maple_softc *, struct maple_unit *); 134 static void maple_detach_unit_nofix(struct maple_softc *, 135 struct maple_unit *); 136 static void maple_detach_unit(struct maple_softc *, struct maple_unit *); 137 static void maple_queue_cmds(struct maple_softc *, 138 struct maple_cmdq_head *); 139 static void maple_unit_probe(struct maple_softc *); 140 static void maple_unit_ping(struct maple_softc *); 141 static int maple_send_defered_periodic(struct maple_softc *); 142 static void maple_send_periodic(struct maple_softc *); 143 static void maple_remove_from_queues(struct maple_softc *, 144 struct maple_unit *); 145 static int maple_retry(struct maple_softc *, struct maple_unit *, 146 enum maple_dma_stat); 147 static void maple_queue_retry(struct maple_softc *); 148 static void maple_check_responses(struct maple_softc *); 149 static void maple_event_thread(void *); 150 static int maple_intr(void *); 151 static void maple_callout(void *); 152 153 int maple_alloc_dma(size_t, vaddr_t *, paddr_t *); 154 #if 0 155 void maple_free_dma(paddr_t, size_t); 156 #endif 157 158 /* 159 * Global variables. 160 */ 161 int maple_polling; /* Are we polling? (Debugger mode) */ 162 163 CFATTACH_DECL(maple, sizeof(struct maple_softc), 164 maplematch, mapleattach, NULL, NULL); 165 166 extern struct cfdriver maple_cd; 167 168 dev_type_open(mapleopen); 169 dev_type_close(mapleclose); 170 dev_type_ioctl(mapleioctl); 171 172 const struct cdevsw maple_cdevsw = { 173 mapleopen, mapleclose, noread, nowrite, mapleioctl, 174 nostop, notty, nopoll, nommap, nokqfilter, 175 }; 176 177 static int 178 maplematch(struct device *parent, struct cfdata *cf, void *aux) 179 { 180 181 return (1); 182 } 183 184 static void 185 mapleattach(struct device *parent, struct device *self, void *aux) 186 { 187 struct maple_softc *sc; 188 struct maple_unit *u; 189 vaddr_t dmabuffer; 190 paddr_t dmabuffer_phys; 191 u_int32_t *p; 192 int port, subunit, f; 193 194 sc = (struct maple_softc *)self; 195 196 printf(": %s\n", sysasic_intr_string(IPL_MAPLE)); 197 198 if (maple_alloc_dma(MAPLE_DMABUF_SIZE, &dmabuffer, &dmabuffer_phys)) { 199 printf("%s: unable to allocate DMA buffers.\n", 200 sc->sc_dev.dv_xname); 201 return; 202 } 203 204 p = (u_int32_t *)dmabuffer; 205 206 for (port = 0; port < MAPLE_PORTS; port++) 207 for (subunit = 0; subunit < MAPLE_SUBUNITS; subunit++) { 208 u = &sc->sc_unit[port][subunit]; 209 u->port = port; 210 u->subunit = subunit; 211 u->u_dma_stat = MAPLE_DMA_IDLE; 212 u->u_rxbuf = p; 213 u->u_rxbuf_phys = SH3_P2SEG_TO_PHYS(p); 214 p += 256; 215 216 for (f = 0; f < MAPLE_NFUNC; f++) { 217 u->u_func[f].f_funcno = f; 218 u->u_func[f].f_unit = u; 219 } 220 } 221 222 sc->sc_txbuf = p; 223 sc->sc_txbuf_phys = SH3_P2SEG_TO_PHYS(p); 224 225 SIMPLEQ_INIT(&sc->sc_retryq); 226 TAILQ_INIT(&sc->sc_probeq); 227 TAILQ_INIT(&sc->sc_pingq); 228 TAILQ_INIT(&sc->sc_periodicq); 229 TAILQ_INIT(&sc->sc_periodicdeferq); 230 TAILQ_INIT(&sc->sc_acmdq); 231 TAILQ_INIT(&sc->sc_pcmdq); 232 233 MAPLE_RESET = RESET_MAGIC; 234 MAPLE_RESET2 = 0; 235 236 MAPLE_SPEED = SPEED_2MBPS | TIMEOUT(50000); 237 238 MAPLE_ENABLE = 1; 239 240 maple_polling = 1; 241 maple_scanbus(sc); 242 243 callout_init(&sc->maple_callout_ch); 244 245 sc->sc_intrhand = sysasic_intr_establish(SYSASIC_EVENT_MAPLE_DMADONE, 246 IPL_MAPLE, maple_intr, sc); 247 248 config_pending_incr(); /* create thread before mounting root */ 249 kthread_create(maple_create_event_thread, sc); 250 } 251 252 static void 253 maple_create_event_thread(void *arg) 254 { 255 struct maple_softc *sc = arg; 256 257 if (kthread_create1(maple_event_thread, sc, &sc->event_thread, 258 "%s", sc->sc_dev.dv_xname) == 0) 259 return; 260 261 panic("%s: unable to create event thread", sc->sc_dev.dv_xname); 262 } 263 264 /* 265 * initial device attach 266 */ 267 static void 268 maple_scanbus(struct maple_softc *sc) 269 { 270 struct maple_unit *u; 271 int port; 272 int last_port, last_subunit; 273 int i; 274 275 KASSERT(cold && maple_polling); 276 277 /* probe all ports */ 278 for (port = 0; port < MAPLE_PORTS; port++) { 279 u = &sc->sc_unit[port][0]; 280 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 2 281 { 282 char buf[16]; 283 printf("%s: queued to probe 1\n", 284 maple_unit_name(buf, u->port, u->subunit)); 285 } 286 #endif 287 TAILQ_INSERT_TAIL(&sc->sc_probeq, u, u_q); 288 u->u_queuestat = MAPLE_QUEUE_PROBE; 289 } 290 291 last_port = last_subunit = -1; 292 maple_begin_txbuf(sc); 293 while ((u = TAILQ_FIRST(&sc->sc_probeq)) != NULL) { 294 /* 295 * Check wrap condition 296 */ 297 if (u->port < last_port || u->subunit <= last_subunit) 298 break; 299 last_port = u->port; 300 if (u->port == MAPLE_PORTS - 1) 301 last_subunit = u->subunit; 302 303 maple_unit_probe(sc); 304 for (i = 10 /* just not forever */; maple_end_txbuf(sc); i--) { 305 maple_start_poll(sc); 306 maple_check_responses(sc); 307 if (i == 0) 308 break; 309 /* attach may issue cmds */ 310 maple_queue_cmds(sc, &sc->sc_acmdq); 311 } 312 } 313 } 314 315 void 316 maple_run_polling(struct device *dev) 317 { 318 struct maple_softc *sc; 319 int port, subunit; 320 int i; 321 322 sc = (struct maple_softc *)dev; 323 324 /* 325 * first, make sure polling works 326 */ 327 while (MAPLE_STATE != 0) /* XXX may lost a DMA cycle */ 328 ; 329 330 /* XXX this will break internal state */ 331 for (port = 0; port < MAPLE_PORTS; port++) 332 for (subunit = 0; subunit < MAPLE_SUBUNITS; subunit++) 333 sc->sc_unit[port][subunit].u_dma_stat = MAPLE_DMA_IDLE; 334 SIMPLEQ_INIT(&sc->sc_retryq); /* XXX discard current retrys */ 335 336 /* 337 * do polling (periodic status check only) 338 */ 339 maple_begin_txbuf(sc); 340 maple_send_defered_periodic(sc); 341 maple_send_periodic(sc); 342 for (i = 10 /* just not forever */; maple_end_txbuf(sc); i--) { 343 maple_start_poll(sc); 344 maple_check_responses(sc); 345 if (i == 0) 346 break; 347 348 /* maple_check_responses() has executed maple_begin_txbuf() */ 349 maple_queue_retry(sc); 350 maple_send_defered_periodic(sc); 351 } 352 } 353 354 static char * 355 maple_unit_name(char *buf, int port, int subunit) 356 { 357 358 sprintf(buf, "maple%c", port + 'A'); 359 if (subunit) 360 sprintf(buf+6, "%d", subunit); 361 362 return buf; 363 } 364 365 int 366 maple_alloc_dma(size_t size, vaddr_t *vap, paddr_t *pap) 367 { 368 extern paddr_t avail_start, avail_end; /* from pmap.c */ 369 struct pglist mlist; 370 struct vm_page *m; 371 int error; 372 373 size = round_page(size); 374 375 error = uvm_pglistalloc(size, avail_start, avail_end - PAGE_SIZE, 376 0, 0, &mlist, 1, 0); 377 if (error) 378 return (error); 379 380 m = TAILQ_FIRST(&mlist); 381 *pap = VM_PAGE_TO_PHYS(m); 382 *vap = SH3_PHYS_TO_P2SEG(VM_PAGE_TO_PHYS(m)); 383 384 return (0); 385 } 386 387 #if 0 /* currently unused */ 388 void 389 maple_free_dma(paddr_t paddr, size_t size) 390 { 391 struct pglist mlist; 392 struct vm_page *m; 393 bus_addr_t addr; 394 395 TAILQ_INIT(&mlist); 396 for (addr = paddr; addr < paddr + size; addr += PAGE_SIZE) { 397 m = PHYS_TO_VM_PAGE(addr); 398 TAILQ_INSERT_TAIL(&mlist, m, pageq); 399 } 400 uvm_pglistfree(&mlist); 401 } 402 #endif 403 404 static void 405 maple_begin_txbuf(struct maple_softc *sc) 406 { 407 408 sc->sc_txlink = sc->sc_txpos = sc->sc_txbuf; 409 SIMPLEQ_INIT(&sc->sc_dmaq); 410 } 411 412 static int 413 maple_end_txbuf(struct maple_softc *sc) 414 { 415 416 /* if no frame have been written, we can't mark the 417 list end, and so the DMA must not be activated */ 418 if (sc->sc_txpos == sc->sc_txbuf) 419 return (0); 420 421 *sc->sc_txlink |= 0x80000000; 422 423 return (1); 424 } 425 426 static const int8_t subunit_code[] = { 0x20, 0x01, 0x02, 0x04, 0x08, 0x10 }; 427 428 static void 429 maple_queue_command(struct maple_softc *sc, struct maple_unit *u, 430 int command, int datalen, void *dataaddr) 431 { 432 int to, from; 433 u_int32_t *p = sc->sc_txpos; 434 435 /* Max data length = 255 longs = 1020 bytes */ 436 KASSERT(datalen >= 0 && datalen <= 255); 437 438 /* Compute sender and recipient address */ 439 from = u->port << 6; 440 to = from | subunit_code[u->subunit]; 441 442 sc->sc_txlink = p; 443 444 /* Set length of packet and destination port (A-D) */ 445 *p++ = datalen | (u->port << 16); 446 447 /* Write address to receive buffer where the response 448 frame should be put */ 449 *p++ = u->u_rxbuf_phys; 450 451 /* Create the frame header. The fields are assembled "backwards" 452 because of the Maple Bus big-endianness. */ 453 *p++ = (command & 0xff) | (to << 8) | (from << 16) | (datalen << 24); 454 455 /* Copy parameter data, if any */ 456 if (datalen > 0) { 457 u_int32_t *param = dataaddr; 458 int i; 459 for (i = 0; i < datalen; i++) 460 *p++ = *param++; 461 } 462 463 sc->sc_txpos = p; 464 465 SIMPLEQ_INSERT_TAIL(&sc->sc_dmaq, u, u_dmaq); 466 } 467 468 static void 469 maple_write_command(struct maple_softc *sc, struct maple_unit *u, int command, 470 int datalen, void *dataaddr) 471 { 472 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 2 473 char buf[16]; 474 475 if (u->u_retrycnt) 476 printf("%s: retrycnt %d\n", 477 maple_unit_name(buf, u->port, u->subunit), u->u_retrycnt); 478 #endif 479 u->u_retrycnt = 0; 480 u->u_command = command; 481 u->u_datalen = datalen; 482 u->u_dataaddr = dataaddr; 483 484 maple_queue_command(sc, u, command, datalen, dataaddr); 485 } 486 487 /* start DMA */ 488 static void 489 maple_start(struct maple_softc *sc) 490 { 491 492 MAPLE_DMAADDR = sc->sc_txbuf_phys; 493 MAPLE_STATE = 1; 494 } 495 496 /* start DMA -- wait until DMA done */ 497 static void 498 maple_start_poll(struct maple_softc *sc) 499 { 500 501 MAPLE_DMAADDR = sc->sc_txbuf_phys; 502 MAPLE_STATE = 1; 503 while (MAPLE_STATE != 0) 504 ; 505 } 506 507 static void 508 maple_check_subunit_change(struct maple_softc *sc, struct maple_unit *u) 509 { 510 struct maple_unit *u1; 511 int port; 512 int8_t unit_map; 513 int units, un; 514 int i; 515 516 KASSERT(u->subunit == 0); 517 518 port = u->port; 519 unit_map = ((int8_t *) u->u_rxbuf)[2]; 520 if (sc->sc_port_unit_map[port] == unit_map) 521 return; 522 523 units = ((unit_map & 0x1f) << 1) | 1; 524 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 1 525 { 526 char buf[16]; 527 printf("%s: unit_map 0x%x -> 0x%x (units 0x%x)\n", 528 maple_unit_name(buf, u->port, u->subunit), 529 sc->sc_port_unit_map[port], unit_map, units); 530 } 531 #endif 532 #if 0 /* this detects unit removal rapidly but is not reliable */ 533 /* check for unit change */ 534 un = sc->sc_port_units[port] & ~units; 535 536 /* detach removed devices */ 537 for (i = MAPLE_SUBUNITS - 1; i > 0; i--) 538 if (un & (1 << i)) 539 maple_detach_unit_nofix(sc, &sc->sc_unit[port][i]); 540 #endif 541 542 sc->sc_port_unit_map[port] = unit_map; 543 544 /* schedule scanning child devices */ 545 un = units & ~sc->sc_port_units[port]; 546 for (i = MAPLE_SUBUNITS - 1; i > 0; i--) 547 if (un & (1 << i)) { 548 u1 = &sc->sc_unit[port][i]; 549 maple_remove_from_queues(sc, u1); 550 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 2 551 { 552 char buf[16]; 553 printf("%s: queued to probe 2\n", 554 maple_unit_name(buf, u1->port, u1->subunit)); 555 } 556 #endif 557 TAILQ_INSERT_HEAD(&sc->sc_probeq, u1, u_q); 558 u1->u_queuestat = MAPLE_QUEUE_PROBE; 559 u1->u_proberetry = 0; 560 } 561 } 562 563 static void 564 maple_check_unit_change(struct maple_softc *sc, struct maple_unit *u) 565 { 566 struct maple_devinfo *newinfo = (void *) (u->u_rxbuf + 1); 567 int port, subunit; 568 569 port = u->port; 570 subunit = u->subunit; 571 if (memcmp(&u->devinfo, newinfo, sizeof(struct maple_devinfo)) == 0) 572 goto out; /* no change */ 573 574 /* unit inserted */ 575 576 /* attach this device */ 577 u->devinfo = *newinfo; 578 maple_attach_unit(sc, u); 579 580 out: 581 maple_remove_from_queues(sc, u); 582 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 2 583 { 584 char buf[16]; 585 printf("%s: queued to ping\n", 586 maple_unit_name(buf, u->port, u->subunit)); 587 } 588 #endif 589 TAILQ_INSERT_TAIL(&sc->sc_pingq, u, u_q); 590 u->u_queuestat = MAPLE_QUEUE_PING; 591 } 592 593 static void 594 maple_print_unit(void *aux, const char *pnp) 595 { 596 struct maple_attach_args *ma = aux; 597 int port, subunit; 598 char buf[16]; 599 char *prod, *p, oc; 600 601 port = ma->ma_unit->port; 602 subunit = ma->ma_unit->subunit; 603 604 if (pnp != NULL) 605 printf("%s at %s", maple_unit_name(buf, port, subunit), pnp); 606 607 printf(" port %d", port); 608 609 if (subunit != 0) 610 printf(" subunit %d", subunit); 611 612 #ifdef MAPLE_DEBUG 613 printf(": a %#x fn %#x d %#x,%#x,%#x", 614 ma->ma_devinfo->di_area_code, 615 ntohl(ma->ma_devinfo->di_func), 616 ntohl(ma->ma_devinfo->di_function_data[0]), 617 ntohl(ma->ma_devinfo->di_function_data[1]), 618 ntohl(ma->ma_devinfo->di_function_data[2])); 619 #endif 620 621 /* nul termination */ 622 prod = ma->ma_devinfo->di_product_name; 623 for (p = prod + sizeof ma->ma_devinfo->di_product_name; p >= prod; p--) 624 if (p[-1] != '\0' && p[-1] != ' ') 625 break; 626 oc = *p; 627 *p = '\0'; 628 629 printf(": %s", prod); 630 631 *p = oc; /* restore */ 632 } 633 634 static int 635 maplesubmatch(struct device *parent, struct cfdata *match, void *aux) 636 { 637 struct maple_attach_args *ma = aux; 638 639 if (match->cf_loc[MAPLECF_PORT] != MAPLECF_PORT_DEFAULT && 640 match->cf_loc[MAPLECF_PORT] != ma->ma_unit->port) 641 return (0); 642 643 if (match->cf_loc[MAPLECF_SUBUNIT] != MAPLECF_SUBUNIT_DEFAULT && 644 match->cf_loc[MAPLECF_SUBUNIT] != ma->ma_unit->subunit) 645 return (0); 646 647 return (config_match(parent, match, aux)); 648 } 649 650 static int 651 mapleprint(void *aux, const char *str) 652 { 653 struct maple_attach_args *ma = aux; 654 655 #ifdef MAPLE_DEBUG 656 if (str) 657 printf("%s", str); 658 printf(" function %d", ma->ma_function); 659 660 return UNCONF; 661 #else /* quiet */ 662 if (!str) 663 printf(" function %d", ma->ma_function); 664 665 return QUIET; 666 #endif 667 } 668 669 static void 670 maple_attach_unit(struct maple_softc *sc, struct maple_unit *u) 671 { 672 struct maple_attach_args ma; 673 u_int32_t func; 674 int f; 675 char oldxname[16]; 676 677 ma.ma_unit = u; 678 ma.ma_devinfo = &u->devinfo; 679 func = ntohl(ma.ma_devinfo->di_func); 680 681 maple_print_unit(&ma, sc->sc_dev.dv_xname); 682 printf("\n"); 683 strcpy(oldxname, sc->sc_dev.dv_xname); 684 maple_unit_name(sc->sc_dev.dv_xname, u->port, u->subunit); 685 686 for (f = 0; f < MAPLE_NFUNC; f++, ma.ma_function <<= 1) { 687 u->u_func[f].f_callback = NULL; 688 u->u_func[f].f_arg = NULL; 689 u->u_func[f].f_cmdstat = MAPLE_CMDSTAT_NONE; 690 u->u_func[f].f_dev = NULL; 691 if (func & MAPLE_FUNC(f)) { 692 ma.ma_function = f; 693 u->u_func[f].f_dev = config_found_sm(&sc->sc_dev, &ma, 694 mapleprint, maplesubmatch); 695 u->u_ping_func = f; /* XXX using largest func */ 696 } 697 } 698 strcpy(sc->sc_dev.dv_xname, oldxname); 699 700 sc->sc_port_units[u->port] |= 1 << u->subunit; 701 } 702 703 static void 704 maple_detach_unit_nofix(struct maple_softc *sc, struct maple_unit *u) 705 { 706 struct maple_func *fn; 707 struct device *dev; 708 struct maple_unit *u1; 709 int port; 710 int error; 711 int i; 712 char buf[16]; 713 714 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 1 715 printf("%s: remove\n", maple_unit_name(buf, u->port, u->subunit)); 716 #endif 717 maple_remove_from_queues(sc, u); 718 port = u->port; 719 sc->sc_port_units[port] &= ~(1 << u->subunit); 720 721 if (u->subunit == 0) { 722 for (i = MAPLE_SUBUNITS - 1; i > 0; i--) 723 maple_detach_unit_nofix(sc, &sc->sc_unit[port][i]); 724 } 725 726 for (fn = u->u_func; fn < &u->u_func[MAPLE_NFUNC]; fn++) { 727 if ((dev = fn->f_dev) != NULL) { 728 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 1 729 printf("%s: detaching func %d\n", 730 maple_unit_name(buf, port, u->subunit), 731 fn->f_funcno); 732 #endif 733 734 /* 735 * Remove functions from command queue. 736 */ 737 switch (fn->f_cmdstat) { 738 case MAPLE_CMDSTAT_ASYNC: 739 case MAPLE_CMDSTAT_PERIODIC_DEFERED: 740 TAILQ_REMOVE(&sc->sc_acmdq, fn, f_cmdq); 741 break; 742 case MAPLE_CMDSTAT_ASYNC_PERIODICQ: 743 case MAPLE_CMDSTAT_PERIODIC: 744 TAILQ_REMOVE(&sc->sc_pcmdq, fn, f_cmdq); 745 break; 746 default: 747 break; 748 } 749 750 /* 751 * Detach devices. 752 */ 753 if ((error = config_detach(fn->f_dev, DETACH_FORCE))) { 754 printf("%s: failed to detach %s (func %d), errno %d\n", 755 maple_unit_name(buf, port, u->subunit), 756 fn->f_dev->dv_xname, fn->f_funcno, error); 757 } 758 } 759 760 maple_enable_periodic(&sc->sc_dev, u, fn->f_funcno, 0); 761 762 fn->f_dev = NULL; 763 fn->f_callback = NULL; 764 fn->f_arg = NULL; 765 fn->f_cmdstat = MAPLE_CMDSTAT_NONE; 766 } 767 if (u->u_dma_stat == MAPLE_DMA_RETRY) { 768 /* XXX expensive? */ 769 SIMPLEQ_FOREACH(u1, &sc->sc_retryq, u_dmaq) { 770 if (u1 == u) { 771 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 1 772 printf("%s: abort retry\n", 773 maple_unit_name(buf, port, u->subunit)); 774 #endif 775 SIMPLEQ_REMOVE(&sc->sc_retryq, u, maple_unit, 776 u_dmaq); 777 break; 778 } 779 } 780 } 781 u->u_dma_stat = MAPLE_DMA_IDLE; 782 u->u_noping = 0; 783 /* u->u_dma_func = uninitialized; */ 784 KASSERT(u->getcond_func_set == 0); 785 memset(&u->devinfo, 0, sizeof(struct maple_devinfo)); 786 787 if (u->subunit == 0) { 788 sc->sc_port_unit_map[port] = 0; 789 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 2 790 { 791 char buf[16]; 792 printf("%s: queued to probe 3\n", 793 maple_unit_name(buf, port, u->subunit)); 794 } 795 #endif 796 TAILQ_INSERT_TAIL(&sc->sc_probeq, u, u_q); 797 u->u_queuestat = MAPLE_QUEUE_PROBE; 798 } 799 } 800 801 static void 802 maple_detach_unit(struct maple_softc *sc, struct maple_unit *u) 803 { 804 805 maple_detach_unit_nofix(sc, u); 806 if (u->subunit != 0) 807 sc->sc_port_unit_map[u->port] &= ~(1 << (u->subunit - 1)); 808 } 809 810 /* 811 * Send a command (called by drivers) 812 * 813 * The "cataaddr" must not point at temporary storage like stack. 814 * Only one command (per function) is valid at a time. 815 */ 816 void 817 maple_command(struct device *dev, struct maple_unit *u, int func, 818 int command, int datalen, void *dataaddr, int flags) 819 { 820 struct maple_softc *sc = (void *) dev; 821 struct maple_func *fn; 822 int s; 823 824 KASSERT(func >= 0 && func < 32); 825 KASSERT(command); 826 KASSERT((flags & ~MAPLE_FLAG_CMD_PERIODIC_TIMING) == 0); 827 828 s = splsoftclock(); 829 830 fn = &u->u_func[func]; 831 #if 1 /*def DIAGNOSTIC*/ 832 {char buf[16]; 833 if (fn->f_cmdstat != MAPLE_CMDSTAT_NONE) 834 panic("maple_command: %s func %d: requesting more than one commands", 835 maple_unit_name(buf, u->port, u->subunit), func); 836 } 837 #endif 838 fn->f_command = command; 839 fn->f_datalen = datalen; 840 fn->f_dataaddr = dataaddr; 841 if (flags & MAPLE_FLAG_CMD_PERIODIC_TIMING) { 842 fn->f_cmdstat = MAPLE_CMDSTAT_PERIODIC; 843 TAILQ_INSERT_TAIL(&sc->sc_pcmdq, fn, f_cmdq); 844 } else { 845 fn->f_cmdstat = MAPLE_CMDSTAT_ASYNC; 846 TAILQ_INSERT_TAIL(&sc->sc_acmdq, fn, f_cmdq); 847 wakeup(&sc->sc_event); /* wake for async event */ 848 } 849 splx(s); 850 } 851 852 static void 853 maple_queue_cmds(struct maple_softc *sc, 854 struct maple_cmdq_head *head) 855 { 856 struct maple_func *fn, *nextfn; 857 struct maple_unit *u; 858 859 /* 860 * Note: since the queue element may be queued immediately, 861 * we can't use TAILQ_FOREACH. 862 */ 863 fn = TAILQ_FIRST(head); 864 TAILQ_INIT(head); 865 for ( ; fn; fn = nextfn) { 866 nextfn = TAILQ_NEXT(fn, f_cmdq); 867 868 KASSERT(fn->f_cmdstat != MAPLE_CMDSTAT_NONE); 869 u = fn->f_unit; 870 if (u->u_dma_stat == MAPLE_DMA_IDLE) { 871 maple_write_command(sc, u, 872 fn->f_command, fn->f_datalen, fn->f_dataaddr); 873 u->u_dma_stat = (fn->f_cmdstat == MAPLE_CMDSTAT_ASYNC || 874 fn->f_cmdstat == MAPLE_CMDSTAT_ASYNC_PERIODICQ) ? 875 MAPLE_DMA_ACMD : MAPLE_DMA_PCMD; 876 u->u_dma_func = fn->f_funcno; 877 fn->f_cmdstat = MAPLE_CMDSTAT_NONE; 878 } else if (u->u_dma_stat == MAPLE_DMA_RETRY) { 879 /* unit is busy --- try again */ 880 /* 881 * always add to periodic command queue 882 * (wait until the next periodic timing), 883 * since the unit will never be freed until the 884 * next periodic timing. 885 */ 886 switch (fn->f_cmdstat) { 887 case MAPLE_CMDSTAT_ASYNC: 888 fn->f_cmdstat = MAPLE_CMDSTAT_ASYNC_PERIODICQ; 889 break; 890 case MAPLE_CMDSTAT_PERIODIC_DEFERED: 891 fn->f_cmdstat = MAPLE_CMDSTAT_PERIODIC; 892 break; 893 default: 894 break; 895 } 896 TAILQ_INSERT_TAIL(&sc->sc_pcmdq, fn, f_cmdq); 897 } else { 898 /* unit is busy --- try again */ 899 /* 900 * always add to async command queue 901 * (process immediately) 902 */ 903 switch (fn->f_cmdstat) { 904 case MAPLE_CMDSTAT_ASYNC_PERIODICQ: 905 fn->f_cmdstat = MAPLE_CMDSTAT_ASYNC; 906 break; 907 case MAPLE_CMDSTAT_PERIODIC: 908 fn->f_cmdstat = MAPLE_CMDSTAT_PERIODIC_DEFERED; 909 break; 910 default: 911 break; 912 } 913 TAILQ_INSERT_TAIL(&sc->sc_acmdq, fn, f_cmdq); 914 } 915 } 916 } 917 918 /* schedule probing a device */ 919 static void 920 maple_unit_probe(struct maple_softc *sc) 921 { 922 struct maple_unit *u; 923 924 if ((u = TAILQ_FIRST(&sc->sc_probeq)) != NULL) { 925 KASSERT(u->u_dma_stat == MAPLE_DMA_IDLE); 926 KASSERT(u->u_queuestat == MAPLE_QUEUE_PROBE); 927 maple_remove_from_queues(sc, u); 928 maple_write_command(sc, u, MAPLE_COMMAND_DEVINFO, 0, NULL); 929 u->u_dma_stat = MAPLE_DMA_PROBE; 930 /* u->u_dma_func = ignored; */ 931 } 932 } 933 934 /* 935 * Enable/disable unit pinging (called by drivers) 936 */ 937 /* ARGSUSED */ 938 void 939 maple_enable_unit_ping(struct device *dev, struct maple_unit *u, 940 int func, int enable) 941 { 942 #if 0 /* currently unused */ 943 struct maple_softc *sc = (void *) dev; 944 #endif 945 946 if (enable) 947 u->u_noping &= ~MAPLE_FUNC(func); 948 else 949 u->u_noping |= MAPLE_FUNC(func); 950 } 951 952 /* schedule pinging a device */ 953 static void 954 maple_unit_ping(struct maple_softc *sc) 955 { 956 struct maple_unit *u; 957 struct maple_func *fn; 958 959 if ((u = TAILQ_FIRST(&sc->sc_pingq)) != NULL) { 960 KASSERT(u->u_queuestat == MAPLE_QUEUE_PING); 961 maple_remove_from_queues(sc, u); 962 if (u->u_dma_stat == MAPLE_DMA_IDLE && u->u_noping == 0) { 963 fn = &u->u_func[u->u_ping_func]; 964 fn->f_work = htonl(MAPLE_FUNC(u->u_ping_func)); 965 maple_write_command(sc, u, MAPLE_COMMAND_GETCOND, 966 1, &fn->f_work); 967 u->u_dma_stat = MAPLE_DMA_PING; 968 /* u->u_dma_func = XXX; */ 969 } else { 970 /* no need if periodic */ 971 TAILQ_INSERT_TAIL(&sc->sc_pingq, u, u_q); 972 u->u_queuestat = MAPLE_QUEUE_PING; 973 } 974 } 975 } 976 977 /* 978 * Enable/disable periodic GETCOND (called by drivers) 979 */ 980 void 981 maple_enable_periodic(struct device *dev, struct maple_unit *u, 982 int func, int on) 983 { 984 struct maple_softc *sc = (void *) dev; 985 struct maple_func *fn; 986 987 KASSERT(func >= 0 && func < 32); 988 989 fn = &u->u_func[func]; 990 991 if (on) { 992 if (fn->f_periodic_stat == MAPLE_PERIODIC_NONE) { 993 TAILQ_INSERT_TAIL(&sc->sc_periodicq, fn, f_periodicq); 994 fn->f_periodic_stat = MAPLE_PERIODIC_INQ; 995 u->getcond_func_set |= MAPLE_FUNC(func); 996 } 997 } else { 998 if (fn->f_periodic_stat == MAPLE_PERIODIC_INQ) 999 TAILQ_REMOVE(&sc->sc_periodicq, fn, f_periodicq); 1000 else if (fn->f_periodic_stat == MAPLE_PERIODIC_DEFERED) 1001 TAILQ_REMOVE(&sc->sc_periodicdeferq, fn, f_periodicq); 1002 fn->f_periodic_stat = MAPLE_PERIODIC_NONE; 1003 u->getcond_func_set &= ~MAPLE_FUNC(func); 1004 } 1005 } 1006 1007 /* 1008 * queue periodic GETCOND 1009 */ 1010 static int 1011 maple_send_defered_periodic(struct maple_softc *sc) 1012 { 1013 struct maple_unit *u; 1014 struct maple_func *fn, *nextfn; 1015 int defer_remain = 0; 1016 1017 for (fn = TAILQ_FIRST(&sc->sc_periodicdeferq); fn; fn = nextfn) { 1018 KASSERT(fn->f_periodic_stat == MAPLE_PERIODIC_DEFERED); 1019 1020 nextfn = TAILQ_NEXT(fn, f_periodicq); 1021 1022 u = fn->f_unit; 1023 if (u->u_dma_stat == MAPLE_DMA_IDLE || 1024 u->u_dma_stat == MAPLE_DMA_RETRY) { 1025 /* 1026 * if IDLE -> queue this request 1027 * if RETRY -> the unit never be freed until the next 1028 * periodic timing, so just restore to 1029 * the normal periodic queue. 1030 */ 1031 TAILQ_REMOVE(&sc->sc_periodicdeferq, fn, f_periodicq); 1032 TAILQ_INSERT_TAIL(&sc->sc_periodicq, fn, f_periodicq); 1033 fn->f_periodic_stat = MAPLE_PERIODIC_INQ; 1034 1035 if (u->u_dma_stat == MAPLE_DMA_IDLE) { 1036 /* 1037 * queue periodic command 1038 */ 1039 fn->f_work = htonl(MAPLE_FUNC(fn->f_funcno)); 1040 maple_write_command(sc, u, 1041 MAPLE_COMMAND_GETCOND, 1, &fn->f_work); 1042 u->u_dma_stat = MAPLE_DMA_PERIODIC; 1043 u->u_dma_func = fn->f_funcno; 1044 } 1045 } else { 1046 defer_remain = 1; 1047 } 1048 } 1049 1050 return defer_remain; 1051 } 1052 1053 static void 1054 maple_send_periodic(struct maple_softc *sc) 1055 { 1056 struct maple_unit *u; 1057 struct maple_func *fn, *nextfn; 1058 1059 for (fn = TAILQ_FIRST(&sc->sc_periodicq); fn; fn = nextfn) { 1060 KASSERT(fn->f_periodic_stat == MAPLE_PERIODIC_INQ); 1061 1062 nextfn = TAILQ_NEXT(fn, f_periodicq); 1063 1064 u = fn->f_unit; 1065 if (u->u_dma_stat != MAPLE_DMA_IDLE) { 1066 if (u->u_dma_stat != MAPLE_DMA_RETRY) { 1067 /* 1068 * can't be queued --- move to defered queue 1069 */ 1070 TAILQ_REMOVE(&sc->sc_periodicq, fn, 1071 f_periodicq); 1072 TAILQ_INSERT_TAIL(&sc->sc_periodicdeferq, fn, 1073 f_periodicq); 1074 fn->f_periodic_stat = MAPLE_PERIODIC_DEFERED; 1075 } 1076 } else { 1077 /* 1078 * queue periodic command 1079 */ 1080 fn->f_work = htonl(MAPLE_FUNC(fn->f_funcno)); 1081 maple_write_command(sc, u, MAPLE_COMMAND_GETCOND, 1082 1, &fn->f_work); 1083 u->u_dma_stat = MAPLE_DMA_PERIODIC; 1084 u->u_dma_func = fn->f_funcno; 1085 } 1086 } 1087 } 1088 1089 static void 1090 maple_remove_from_queues(struct maple_softc *sc, struct maple_unit *u) 1091 { 1092 1093 /* remove from queues */ 1094 if (u->u_queuestat == MAPLE_QUEUE_PROBE) 1095 TAILQ_REMOVE(&sc->sc_probeq, u, u_q); 1096 else if (u->u_queuestat == MAPLE_QUEUE_PING) 1097 TAILQ_REMOVE(&sc->sc_pingq, u, u_q); 1098 #ifdef DIAGNOSTIC 1099 else if (u->u_queuestat != MAPLE_QUEUE_NONE) 1100 panic("maple_remove_from_queues: queuestat %d", u->u_queuestat); 1101 #endif 1102 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 2 1103 if (u->u_queuestat != MAPLE_QUEUE_NONE) { 1104 char buf[16]; 1105 printf("%s: dequeued\n", 1106 maple_unit_name(buf, u->port, u->subunit)); 1107 } 1108 #endif 1109 1110 u->u_queuestat = MAPLE_QUEUE_NONE; 1111 } 1112 1113 /* 1114 * retry current command at next periodic timing 1115 */ 1116 static int 1117 maple_retry(struct maple_softc *sc, struct maple_unit *u, 1118 enum maple_dma_stat st) 1119 { 1120 1121 KASSERT(st != MAPLE_DMA_IDLE && st != MAPLE_DMA_RETRY); 1122 1123 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 2 1124 if (u->u_retrycnt == 0) { 1125 char buf[16]; 1126 printf("%s: retrying: %#x, %#x, %p\n", 1127 maple_unit_name(buf, u->port, u->subunit), 1128 u->u_command, u->u_datalen, u->u_dataaddr); 1129 } 1130 #endif 1131 if (u->u_retrycnt >= MAPLE_RETRY_MAX) 1132 return 1; 1133 1134 u->u_retrycnt++; 1135 1136 u->u_saved_dma_stat = st; 1137 u->u_dma_stat = MAPLE_DMA_RETRY; /* no new command before retry done */ 1138 SIMPLEQ_INSERT_TAIL(&sc->sc_retryq, u, u_dmaq); 1139 1140 return 0; 1141 } 1142 1143 static void 1144 maple_queue_retry(struct maple_softc *sc) 1145 { 1146 struct maple_unit *u, *nextu; 1147 1148 /* 1149 * Note: since the queue element is queued immediately 1150 * in maple_queue_command, we can't use SIMPLEQ_FOREACH. 1151 */ 1152 for (u = SIMPLEQ_FIRST(&sc->sc_retryq); u; u = nextu) { 1153 nextu = SIMPLEQ_NEXT(u, u_dmaq); 1154 1155 /* 1156 * Retrying is in the highest priority, and the unit shall 1157 * always be free. 1158 */ 1159 KASSERT(u->u_dma_stat == MAPLE_DMA_RETRY); 1160 maple_queue_command(sc, u, u->u_command, u->u_datalen, 1161 u->u_dataaddr); 1162 u->u_dma_stat = u->u_saved_dma_stat; 1163 1164 #ifdef DIAGNOSTIC 1165 KASSERT(u->u_saved_dma_stat != MAPLE_DMA_IDLE); 1166 u->u_saved_dma_stat = MAPLE_DMA_IDLE; 1167 #endif 1168 } 1169 SIMPLEQ_INIT(&sc->sc_retryq); 1170 } 1171 1172 /* 1173 * Process DMA results. 1174 * Requires kernel context. 1175 */ 1176 static void 1177 maple_check_responses(struct maple_softc *sc) 1178 { 1179 struct maple_unit *u, *nextu; 1180 struct maple_func *fn; 1181 maple_response_t response; 1182 int func_code, len; 1183 int flags; 1184 char buf[16]; 1185 1186 /* 1187 * Note: since the queue element may be queued immediately, 1188 * we can't use SIMPLEQ_FOREACH. 1189 */ 1190 for (u = SIMPLEQ_FIRST(&sc->sc_dmaq), maple_begin_txbuf(sc); 1191 u; u = nextu) { 1192 nextu = SIMPLEQ_NEXT(u, u_dmaq); 1193 1194 if (u->u_dma_stat == MAPLE_DMA_IDLE) 1195 continue; /* just detached or DDB was active */ 1196 1197 /* 1198 * check for retransmission 1199 */ 1200 if ((response = u->u_rxbuf[0]) == MAPLE_RESPONSE_AGAIN) { 1201 if (maple_retry(sc, u, u->u_dma_stat) == 0) 1202 continue; 1203 /* else pass error to upper layer */ 1204 } 1205 1206 len = (u->u_rxbuf[0] >> 24); /* length in long */ 1207 len <<= 2; /* length in byte */ 1208 1209 /* 1210 * call handler 1211 */ 1212 if (u->u_dma_stat == MAPLE_DMA_PERIODIC) { 1213 /* 1214 * periodic GETCOND 1215 */ 1216 u->u_dma_stat = MAPLE_DMA_IDLE; 1217 func_code = u->u_dma_func; 1218 if (response == MAPLE_RESPONSE_DATATRF && len > 0 && 1219 ntohl(u->u_rxbuf[1]) == MAPLE_FUNC(func_code)) { 1220 fn = &u->u_func[func_code]; 1221 if (fn->f_dev) 1222 (*fn->f_callback)(fn->f_arg, 1223 (void *)u->u_rxbuf, len, 1224 MAPLE_FLAG_PERIODIC); 1225 } else if (response == MAPLE_RESPONSE_NONE) { 1226 /* XXX OK? */ 1227 /* detach */ 1228 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 2 1229 printf("%s: func: %d: periodic response %d\n", 1230 maple_unit_name(buf, u->port, u->subunit), 1231 u->u_dma_func, 1232 response); 1233 #endif 1234 /* 1235 * Some 3rd party devices sometimes 1236 * do not respond. 1237 */ 1238 if (maple_retry(sc, u, MAPLE_DMA_PERIODIC)) 1239 maple_detach_unit(sc, u); 1240 } 1241 /* XXX check unexpected conditions? */ 1242 1243 } else if (u->u_dma_stat == MAPLE_DMA_PROBE) { 1244 KASSERT(u->u_queuestat == MAPLE_QUEUE_NONE); 1245 u->u_dma_stat = MAPLE_DMA_IDLE; 1246 switch (response) { 1247 default: 1248 case MAPLE_RESPONSE_NONE: 1249 /* 1250 * Do not use maple_retry(), which conflicts 1251 * with probe structure. 1252 */ 1253 if (u->subunit != 0 && 1254 ++u->u_proberetry > MAPLE_PROBERETRY_MAX) { 1255 printf("%s: no response\n", 1256 maple_unit_name(buf, 1257 u->port, u->subunit)); 1258 } else { 1259 /* probe again */ 1260 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 2 1261 printf("%s: queued to probe 4\n", 1262 maple_unit_name(buf, u->port, u->subunit)); 1263 #endif 1264 TAILQ_INSERT_TAIL(&sc->sc_probeq, u, 1265 u_q); 1266 u->u_queuestat = MAPLE_QUEUE_PROBE; 1267 } 1268 break; 1269 case MAPLE_RESPONSE_DEVINFO: 1270 /* check if the unit is changed */ 1271 maple_check_unit_change(sc, u); 1272 break; 1273 } 1274 1275 } else if (u->u_dma_stat == MAPLE_DMA_PING) { 1276 KASSERT(u->u_queuestat == MAPLE_QUEUE_NONE); 1277 u->u_dma_stat = MAPLE_DMA_IDLE; 1278 switch (response) { 1279 default: 1280 case MAPLE_RESPONSE_NONE: 1281 /* 1282 * Some 3rd party devices sometimes 1283 * do not respond. 1284 */ 1285 if (maple_retry(sc, u, MAPLE_DMA_PING)) { 1286 /* detach */ 1287 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 1 1288 printf("%s: ping response %d\n", 1289 maple_unit_name(buf, u->port, 1290 u->subunit), 1291 response); 1292 #endif 1293 maple_detach_unit(sc, u); 1294 } 1295 break; 1296 case MAPLE_RESPONSE_BADCMD: 1297 case MAPLE_RESPONSE_BADFUNC: 1298 case MAPLE_RESPONSE_DATATRF: 1299 TAILQ_INSERT_TAIL(&sc->sc_pingq, u, u_q); 1300 u->u_queuestat = MAPLE_QUEUE_PING; 1301 break; 1302 } 1303 1304 } else { 1305 /* 1306 * Note: Do not rely on the consistency of responses. 1307 */ 1308 1309 if (response == MAPLE_RESPONSE_NONE) { 1310 if (maple_retry(sc, u, u->u_dma_stat)) { 1311 /* detach */ 1312 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 1 1313 printf("%s: command response %d\n", 1314 maple_unit_name(buf, u->port, 1315 u->subunit), 1316 response); 1317 #endif 1318 maple_detach_unit(sc, u); 1319 } 1320 continue; 1321 } 1322 1323 flags = (u->u_dma_stat == MAPLE_DMA_PCMD) ? 1324 MAPLE_FLAG_CMD_PERIODIC_TIMING : 0; 1325 u->u_dma_stat = MAPLE_DMA_IDLE; 1326 1327 func_code = u->u_dma_func; 1328 fn = &u->u_func[func_code]; 1329 if (fn->f_dev == NULL) { 1330 /* detached right now */ 1331 #ifdef MAPLE_DEBUG 1332 printf("%s: unknown function: function %d, response %d\n", 1333 maple_unit_name(buf, u->port, u->subunit), 1334 func_code, response); 1335 #endif 1336 continue; 1337 } 1338 if (fn->f_callback != NULL) { 1339 (*fn->f_callback)(fn->f_arg, 1340 (void *)u->u_rxbuf, len, flags); 1341 } 1342 } 1343 1344 /* 1345 * check for subunit change and schedule probing subunits 1346 */ 1347 if (u->subunit == 0 && response != MAPLE_RESPONSE_NONE && 1348 response != MAPLE_RESPONSE_AGAIN && 1349 ((int8_t *) u->u_rxbuf)[2] != sc->sc_port_unit_map[u->port]) 1350 maple_check_subunit_change(sc, u); 1351 } 1352 } 1353 1354 /* 1355 * Main Maple Bus thread 1356 */ 1357 static void 1358 maple_event_thread(void *arg) 1359 { 1360 struct maple_softc *sc = arg; 1361 unsigned cnt = 1; /* timing counter */ 1362 int s; 1363 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 1 1364 int noreq = 0; 1365 #endif 1366 1367 #ifdef MAPLE_DEBUG 1368 printf("%s: forked event thread, pid %d\n", 1369 sc->sc_dev.dv_xname, sc->event_thread->p_pid); 1370 #endif 1371 1372 /* begin first DMA cycle */ 1373 maple_begin_txbuf(sc); 1374 1375 sc->sc_event = 1; 1376 1377 /* OK, continue booting system */ 1378 maple_polling = 0; 1379 config_pending_decr(); 1380 1381 for (;;) { 1382 /* 1383 * queue requests 1384 */ 1385 1386 /* queue async commands */ 1387 if (!TAILQ_EMPTY(&sc->sc_acmdq)) 1388 maple_queue_cmds(sc, &sc->sc_acmdq); 1389 1390 /* send defered periodic command */ 1391 if (!TAILQ_EMPTY(&sc->sc_periodicdeferq)) 1392 maple_send_defered_periodic(sc); 1393 1394 /* queue periodic commands */ 1395 if (sc->sc_event) { 1396 /* queue commands on periodic timing */ 1397 if (!TAILQ_EMPTY(&sc->sc_pcmdq)) 1398 maple_queue_cmds(sc, &sc->sc_pcmdq); 1399 1400 /* retry */ 1401 if (!SIMPLEQ_EMPTY(&sc->sc_retryq)) 1402 maple_queue_retry(sc); 1403 1404 if ((cnt & 31) == 0) /* XXX */ 1405 maple_unit_probe(sc); 1406 cnt++; 1407 1408 maple_send_periodic(sc); 1409 if ((cnt & 7) == 0) /* XXX */ 1410 maple_unit_ping(sc); 1411 1412 /* 1413 * schedule periodic event 1414 */ 1415 sc->sc_event = 0; 1416 callout_reset(&sc->maple_callout_ch, 1417 MAPLE_CALLOUT_TICKS, maple_callout, sc); 1418 } 1419 1420 if (maple_end_txbuf(sc)) { 1421 1422 /* 1423 * start DMA 1424 */ 1425 s = splmaple(); 1426 maple_start(sc); 1427 1428 /* 1429 * wait until DMA done 1430 */ 1431 if (tsleep(&sc->sc_dmadone, PWAIT, "mdma", hz) 1432 == EWOULDBLOCK) { 1433 /* was DDB active? */ 1434 printf("%s: timed out\n", sc->sc_dev.dv_xname); 1435 } 1436 splx(s); 1437 1438 /* 1439 * call handlers 1440 */ 1441 maple_check_responses(sc); 1442 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 1 1443 noreq = 0; 1444 #endif 1445 } 1446 #if defined(MAPLE_DEBUG) && MAPLE_DEBUG > 1 1447 else { 1448 /* weird if occurs in succession */ 1449 #if MAPLE_DEBUG <= 2 1450 if (noreq) /* ignore first time */ 1451 #endif 1452 printf("%s: no request %d\n", 1453 sc->sc_dev.dv_xname, noreq); 1454 noreq++; 1455 } 1456 #endif 1457 1458 /* 1459 * wait for an event 1460 */ 1461 s = splsoftclock(); 1462 if (TAILQ_EMPTY(&sc->sc_acmdq) && sc->sc_event == 0 && 1463 TAILQ_EMPTY(&sc->sc_periodicdeferq)) { 1464 if (tsleep(&sc->sc_event, PWAIT, "mslp", hz) 1465 == EWOULDBLOCK) { 1466 printf("%s: event timed out\n", 1467 sc->sc_dev.dv_xname); 1468 } 1469 1470 } 1471 splx(s); 1472 1473 } 1474 1475 #if 0 /* maple root device can't be detached */ 1476 kthread_exit(0); 1477 /* NOTREACHED */ 1478 #endif 1479 } 1480 1481 static int 1482 maple_intr(void *arg) 1483 { 1484 struct maple_softc *sc = arg; 1485 1486 wakeup(&sc->sc_dmadone); 1487 1488 return 1; 1489 } 1490 1491 static void 1492 maple_callout(void *ctx) 1493 { 1494 struct maple_softc *sc = ctx; 1495 1496 sc->sc_event = 1; /* mark as periodic event */ 1497 wakeup(&sc->sc_event); 1498 } 1499 1500 /* 1501 * Install callback handler (called by drivers) 1502 */ 1503 /* ARGSUSED */ 1504 void 1505 maple_set_callback(struct device *dev, struct maple_unit *u, int func, 1506 void (*callback)(void *, struct maple_response *, int, int), void *arg) 1507 { 1508 #if 0 /* currently unused */ 1509 struct maple_softc *sc = (void *) dev; 1510 #endif 1511 struct maple_func *fn; 1512 1513 KASSERT(func >= 0 && func < MAPLE_NFUNC); 1514 1515 fn = &u->u_func[func]; 1516 1517 fn->f_callback = callback; 1518 fn->f_arg = arg; 1519 } 1520 1521 /* 1522 * Return function definition data (called by drivers) 1523 */ 1524 u_int32_t 1525 maple_get_function_data(struct maple_devinfo *devinfo, int function_code) 1526 { 1527 int i, p = 0; 1528 u_int32_t func; 1529 1530 func = ntohl(devinfo->di_func); 1531 for (i = 31; i >= 0; --i) 1532 if (func & MAPLE_FUNC(i)) { 1533 if (function_code == i) 1534 return ntohl(devinfo->di_function_data[p]); 1535 else 1536 if (++p >= 3) 1537 break; 1538 } 1539 1540 return (0); 1541 } 1542 1543 /* Generic maple device interface */ 1544 1545 int 1546 mapleopen(dev_t dev, int flag, int mode, struct proc *p) 1547 { 1548 struct maple_softc *sc; 1549 1550 sc = device_lookup(&maple_cd, MAPLEBUSUNIT(dev)); 1551 if (sc == NULL) /* make sure it was attached */ 1552 return (ENXIO); 1553 1554 if (MAPLEPORT(dev) >= MAPLE_PORTS) 1555 return (ENXIO); 1556 1557 if (MAPLESUBUNIT(dev) >= MAPLE_SUBUNITS) 1558 return (ENXIO); 1559 1560 if (!(sc->sc_port_units[MAPLEPORT(dev)] & (1 << MAPLESUBUNIT(dev)))) 1561 return (ENXIO); 1562 1563 sc->sc_port_units_open[MAPLEPORT(dev)] |= 1 << MAPLESUBUNIT(dev); 1564 1565 return (0); 1566 } 1567 1568 int 1569 mapleclose(dev_t dev, int flag, int mode, struct proc *p) 1570 { 1571 struct maple_softc *sc; 1572 1573 sc = device_lookup(&maple_cd, MAPLEBUSUNIT(dev)); 1574 1575 sc->sc_port_units_open[MAPLEPORT(dev)] &= ~(1 << MAPLESUBUNIT(dev)); 1576 1577 return (0); 1578 } 1579 1580 int 1581 maple_unit_ioctl(struct device *dev, struct maple_unit *u, u_long cmd, 1582 caddr_t data, int flag, struct proc *p) 1583 { 1584 struct maple_softc *sc = (struct maple_softc *)dev; 1585 1586 if (!(sc->sc_port_units[u->port] & (1 << u->subunit))) 1587 return (ENXIO); 1588 1589 switch(cmd) { 1590 case MAPLEIO_GDEVINFO: 1591 memcpy(data, &u->devinfo, sizeof(struct maple_devinfo)); 1592 break; 1593 default: 1594 return (EPASSTHROUGH); 1595 } 1596 1597 return (0); 1598 } 1599 1600 int 1601 mapleioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 1602 { 1603 struct maple_softc *sc; 1604 struct maple_unit *u; 1605 1606 sc = device_lookup(&maple_cd, MAPLEBUSUNIT(dev)); 1607 u = &sc->sc_unit[MAPLEPORT(dev)][MAPLESUBUNIT(dev)]; 1608 1609 return (maple_unit_ioctl(&sc->sc_dev, u, cmd, data, flag, p)); 1610 } 1611
Indexes created Wed Sep 24 02:09:48 GMT 2025