wds.c revision 1.32
1 /* $NetBSD: wds.c,v 1.32 1998/06/09 07:25:06 thorpej Exp $ */ 2 3 #undef WDSDIAG 4 #ifdef DDB 5 #define integrate 6 #else 7 #define integrate static inline 8 #endif 9 10 /* 11 * XXX 12 * sense data 13 * aborts 14 * resets 15 */ 16 17 /*- 18 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 19 * All rights reserved. 20 * 21 * This code is derived from software contributed to The NetBSD Foundation 22 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 23 * NASA Ames Research Center. 24 * 25 * Redistribution and use in source and binary forms, with or without 26 * modification, are permitted provided that the following conditions 27 * are met: 28 * 1. Redistributions of source code must retain the above copyright 29 * notice, this list of conditions and the following disclaimer. 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 3. All advertising materials mentioning features or use of this software 34 * must display the following acknowledgement: 35 * This product includes software developed by the NetBSD 36 * Foundation, Inc. and its contributors. 37 * 4. Neither the name of The NetBSD Foundation nor the names of its 38 * contributors may be used to endorse or promote products derived 39 * from this software without specific prior written permission. 40 * 41 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 42 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 43 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 44 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 45 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 46 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 47 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 48 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 49 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 51 * POSSIBILITY OF SUCH DAMAGE. 52 */ 53 54 /* 55 * Copyright (c) 1994, 1995 Julian Highfield. All rights reserved. 56 * Portions copyright (c) 1994, 1996, 1997 57 * Charles M. Hannum. All rights reserved. 58 * 59 * Redistribution and use in source and binary forms, with or without 60 * modification, are permitted provided that the following conditions 61 * are met: 62 * 1. Redistributions of source code must retain the above copyright 63 * notice, this list of conditions and the following disclaimer. 64 * 2. Redistributions in binary form must reproduce the above copyright 65 * notice, this list of conditions and the following disclaimer in the 66 * documentation and/or other materials provided with the distribution. 67 * 3. All advertising materials mentioning features or use of this software 68 * must display the following acknowledgement: 69 * This product includes software developed by Julian Highfield. 70 * 4. The name of the author may not be used to endorse or promote products 71 * derived from this software without specific prior written permission. 72 * 73 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 74 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 75 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 76 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 77 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 78 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 79 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 80 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 81 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 82 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 83 */ 84 85 /* 86 * This driver is for the WD7000 family of SCSI controllers: 87 * the WD7000-ASC, a bus-mastering DMA controller, 88 * the WD7000-FASST2, an -ASC with new firmware and scatter-gather, 89 * and the WD7000-ASE, which was custom manufactured for Apollo 90 * workstations and seems to include an -ASC as well as floppy 91 * and ESDI interfaces. 92 * 93 * Loosely based on Theo Deraadt's unfinished attempt. 94 */ 95 96 #include <sys/types.h> 97 #include <sys/param.h> 98 #include <sys/systm.h> 99 #include <sys/kernel.h> 100 #include <sys/errno.h> 101 #include <sys/ioctl.h> 102 #include <sys/device.h> 103 #include <sys/malloc.h> 104 #include <sys/buf.h> 105 #include <sys/proc.h> 106 #include <sys/user.h> 107 108 #include <machine/bus.h> 109 #include <machine/intr.h> 110 111 #include <dev/scsipi/scsi_all.h> 112 #include <dev/scsipi/scsipi_all.h> 113 #include <dev/scsipi/scsiconf.h> 114 115 #include <dev/isa/isavar.h> 116 #include <dev/isa/isadmavar.h> 117 118 #include <dev/isa/wdsreg.h> 119 120 #define WDS_ISA_IOSIZE 8 121 122 #ifndef DDB 123 #define Debugger() panic("should call debugger here (wds.c)") 124 #endif /* ! DDB */ 125 126 #define WDS_MAXXFER ((WDS_NSEG - 1) << PGSHIFT) 127 128 #define WDS_MBX_SIZE 16 129 130 #define WDS_SCB_MAX 32 131 #define SCB_HASH_SIZE 32 /* hash table size for phystokv */ 132 #define SCB_HASH_SHIFT 9 133 #define SCB_HASH(x) ((((long)(x))>>SCB_HASH_SHIFT) & (SCB_HASH_SIZE - 1)) 134 135 #define wds_nextmbx(wmb, mbx, mbio) \ 136 if ((wmb) == &(mbx)->mbio[WDS_MBX_SIZE - 1]) \ 137 (wmb) = &(mbx)->mbio[0]; \ 138 else \ 139 (wmb)++; 140 141 struct wds_mbx { 142 struct wds_mbx_out mbo[WDS_MBX_SIZE]; 143 struct wds_mbx_in mbi[WDS_MBX_SIZE]; 144 struct wds_mbx_out *cmbo; /* Collection Mail Box out */ 145 struct wds_mbx_out *tmbo; /* Target Mail Box out */ 146 struct wds_mbx_in *tmbi; /* Target Mail Box in */ 147 }; 148 149 struct wds_softc { 150 struct device sc_dev; 151 152 bus_space_tag_t sc_iot; 153 bus_space_handle_t sc_ioh; 154 bus_dma_tag_t sc_dmat; 155 bus_dmamap_t sc_dmamap_mbox; /* maps the mailbox */ 156 void *sc_ih; 157 158 struct wds_mbx *sc_mbx; 159 #define wmbx (sc->sc_mbx) 160 struct wds_scb *sc_scbhash[SCB_HASH_SIZE]; 161 TAILQ_HEAD(, wds_scb) sc_free_scb, sc_waiting_scb; 162 int sc_numscbs, sc_mbofull; 163 struct scsipi_link sc_link; /* prototype for subdevs */ 164 165 LIST_HEAD(, scsipi_xfer) sc_queue; 166 struct scsipi_xfer *sc_queuelast; 167 168 int sc_revision; 169 int sc_maxsegs; 170 }; 171 172 struct wds_probe_data { 173 #ifdef notyet 174 int sc_irq, sc_drq; 175 #endif 176 int sc_scsi_dev; 177 }; 178 179 integrate void 180 wds_wait __P((bus_space_tag_t, bus_space_handle_t, int, int, int)); 181 int wds_cmd __P((bus_space_tag_t, bus_space_handle_t, u_char *, int)); 182 integrate void wds_finish_scbs __P((struct wds_softc *)); 183 int wdsintr __P((void *)); 184 integrate void wds_reset_scb __P((struct wds_softc *, struct wds_scb *)); 185 void wds_free_scb __P((struct wds_softc *, struct wds_scb *)); 186 integrate int wds_init_scb __P((struct wds_softc *, struct wds_scb *)); 187 struct wds_scb *wds_get_scb __P((struct wds_softc *, int)); 188 struct wds_scb *wds_scb_phys_kv __P((struct wds_softc *, u_long)); 189 void wds_queue_scb __P((struct wds_softc *, struct wds_scb *)); 190 void wds_collect_mbo __P((struct wds_softc *)); 191 void wds_start_scbs __P((struct wds_softc *)); 192 void wds_done __P((struct wds_softc *, struct wds_scb *, u_char)); 193 int wds_find __P((bus_space_tag_t, bus_space_handle_t, struct wds_probe_data *)); 194 void wds_attach __P((struct wds_softc *, struct wds_probe_data *)); 195 void wds_init __P((struct wds_softc *, int)); 196 void wds_inquire_setup_information __P((struct wds_softc *)); 197 void wdsminphys __P((struct buf *)); 198 int wds_scsi_cmd __P((struct scsipi_xfer *)); 199 void wds_sense __P((struct wds_softc *, struct wds_scb *)); 200 int wds_poll __P((struct wds_softc *, struct scsipi_xfer *, int)); 201 int wds_ipoll __P((struct wds_softc *, struct wds_scb *, int)); 202 void wds_timeout __P((void *)); 203 int wds_create_scbs __P((struct wds_softc *, void *, size_t)); 204 void wds_enqueue __P((struct wds_softc *, struct scsipi_xfer *, int)); 205 struct scsipi_xfer *wds_dequeue __P((struct wds_softc *)); 206 207 struct scsipi_adapter wds_switch = { 208 wds_scsi_cmd, 209 wdsminphys, 210 0, 211 0, 212 }; 213 214 /* the below structure is so we have a default dev struct for our link struct */ 215 struct scsipi_device wds_dev = { 216 NULL, /* Use default error handler */ 217 NULL, /* have a queue, served by this */ 218 NULL, /* have no async handler */ 219 NULL, /* Use default 'done' routine */ 220 }; 221 222 int wdsprobe __P((struct device *, struct cfdata *, void *)); 223 void wdsattach __P((struct device *, struct device *, void *)); 224 225 struct cfattach wds_ca = { 226 sizeof(struct wds_softc), wdsprobe, wdsattach 227 }; 228 229 #define WDS_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */ 230 231 /* 232 * Insert a scsipi_xfer into the software queue. We overload xs->free_list 233 * to avoid having to allocate additional resources (since we're used 234 * only during resource shortages anyhow. 235 */ 236 void 237 wds_enqueue(sc, xs, infront) 238 struct wds_softc *sc; 239 struct scsipi_xfer *xs; 240 int infront; 241 { 242 243 if (infront || sc->sc_queue.lh_first == NULL) { 244 if (sc->sc_queue.lh_first == NULL) 245 sc->sc_queuelast = xs; 246 LIST_INSERT_HEAD(&sc->sc_queue, xs, free_list); 247 return; 248 } 249 250 LIST_INSERT_AFTER(sc->sc_queuelast, xs, free_list); 251 sc->sc_queuelast = xs; 252 } 253 254 /* 255 * Pull a scsipi_xfer off the front of the software queue. 256 */ 257 struct scsipi_xfer * 258 wds_dequeue(sc) 259 struct wds_softc *sc; 260 { 261 struct scsipi_xfer *xs; 262 263 xs = sc->sc_queue.lh_first; 264 LIST_REMOVE(xs, free_list); 265 266 if (sc->sc_queue.lh_first == NULL) 267 sc->sc_queuelast = NULL; 268 269 return (xs); 270 } 271 272 integrate void 273 wds_wait(iot, ioh, port, mask, val) 274 bus_space_tag_t iot; 275 bus_space_handle_t ioh; 276 int port; 277 int mask, val; 278 { 279 280 while ((bus_space_read_1(iot, ioh, port) & mask) != val) 281 ; 282 } 283 284 /* 285 * Write a command to the board's I/O ports. 286 */ 287 int 288 wds_cmd(iot, ioh, ibuf, icnt) 289 bus_space_tag_t iot; 290 bus_space_handle_t ioh; 291 u_char *ibuf; 292 int icnt; 293 { 294 u_char c; 295 296 wds_wait(iot, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY); 297 298 while (icnt--) { 299 bus_space_write_1(iot, ioh, WDS_CMD, *ibuf++); 300 wds_wait(iot, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY); 301 c = bus_space_read_1(iot, ioh, WDS_STAT); 302 if (c & WDSS_REJ) 303 return 1; 304 } 305 306 return 0; 307 } 308 309 /* 310 * Check for the presence of a WD7000 SCSI controller. 311 */ 312 int 313 wdsprobe(parent, match, aux) 314 struct device *parent; 315 struct cfdata *match; 316 void *aux; 317 { 318 struct isa_attach_args *ia = aux; 319 bus_space_tag_t iot = ia->ia_iot; 320 bus_space_handle_t ioh; 321 struct wds_probe_data wpd; 322 int rv; 323 324 /* Disallow wildcarded i/o address. */ 325 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 326 return (0); 327 328 if (bus_space_map(iot, ia->ia_iobase, WDS_ISA_IOSIZE, 0, &ioh)) 329 return (0); 330 331 rv = wds_find(iot, ioh, &wpd); 332 333 bus_space_unmap(iot, ioh, WDS_ISA_IOSIZE); 334 335 if (rv) { 336 #ifdef notyet 337 if (ia->ia_irq != -1 && ia->ia_irq != wpd.sc_irq) 338 return (0); 339 if (ia->ia_drq != -1 && ia->ia_drq != wpd.sc_drq) 340 return (0); 341 ia->ia_irq = wpd.sc_irq; 342 ia->ia_drq = wpd.sc_drq; 343 #else 344 if (ia->ia_irq == -1) 345 return (0); 346 if (ia->ia_drq == -1) 347 return (0); 348 #endif 349 ia->ia_msize = 0; 350 ia->ia_iosize = WDS_ISA_IOSIZE; 351 } 352 return (rv); 353 } 354 355 /* 356 * Attach all available units. 357 */ 358 void 359 wdsattach(parent, self, aux) 360 struct device *parent, *self; 361 void *aux; 362 { 363 struct isa_attach_args *ia = aux; 364 struct wds_softc *sc = (void *)self; 365 bus_space_tag_t iot = ia->ia_iot; 366 bus_space_handle_t ioh; 367 struct wds_probe_data wpd; 368 isa_chipset_tag_t ic = ia->ia_ic; 369 370 printf("\n"); 371 372 if (bus_space_map(iot, ia->ia_iobase, WDS_ISA_IOSIZE, 0, &ioh)) { 373 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 374 return; 375 } 376 377 sc->sc_iot = iot; 378 sc->sc_ioh = ioh; 379 sc->sc_dmat = ia->ia_dmat; 380 if (!wds_find(iot, ioh, &wpd)) { 381 printf("%s: wds_find failed\n", sc->sc_dev.dv_xname); 382 return; 383 } 384 385 bus_space_write_1(iot, ioh, WDS_HCR, WDSH_DRQEN); 386 #ifdef notyet 387 if (wpd.sc_drq != -1) 388 isa_dmacascade(ic, wpd.sc_drq); 389 390 sc->sc_ih = isa_intr_establish(ic, wpd.sc_irq, IST_EDGE, IPL_BIO, 391 wdsintr, sc); 392 #else 393 if (ia->ia_drq != -1) 394 isa_dmacascade(ic, ia->ia_drq); 395 396 sc->sc_ih = isa_intr_establish(ic, ia->ia_irq, IST_EDGE, IPL_BIO, 397 wdsintr, sc); 398 #endif 399 if (sc->sc_ih == NULL) { 400 printf("%s: couldn't establish interrupt\n", 401 sc->sc_dev.dv_xname); 402 return; 403 } 404 405 wds_attach(sc, &wpd); 406 } 407 408 void 409 wds_attach(sc, wpd) 410 struct wds_softc *sc; 411 struct wds_probe_data *wpd; 412 { 413 414 TAILQ_INIT(&sc->sc_free_scb); 415 TAILQ_INIT(&sc->sc_waiting_scb); 416 LIST_INIT(&sc->sc_queue); 417 418 wds_init(sc, 0); 419 wds_inquire_setup_information(sc); 420 421 /* 422 * fill in the prototype scsipi_link. 423 */ 424 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 425 sc->sc_link.adapter_softc = sc; 426 sc->sc_link.scsipi_scsi.adapter_target = wpd->sc_scsi_dev; 427 sc->sc_link.adapter = &wds_switch; 428 sc->sc_link.device = &wds_dev; 429 /* XXX */ 430 /* I don't think the -ASE can handle openings > 1. */ 431 /* It gives Vendor Error 26 whenever I try it. */ 432 sc->sc_link.openings = 1; 433 sc->sc_link.scsipi_scsi.max_target = 7; 434 sc->sc_link.type = BUS_SCSI; 435 436 /* 437 * ask the adapter what subunits are present 438 */ 439 config_found(&sc->sc_dev, &sc->sc_link, scsiprint); 440 } 441 442 integrate void 443 wds_finish_scbs(sc) 444 struct wds_softc *sc; 445 { 446 struct wds_mbx_in *wmbi; 447 struct wds_scb *scb; 448 int i; 449 450 wmbi = wmbx->tmbi; 451 452 if (wmbi->stat == WDS_MBI_FREE) { 453 for (i = 0; i < WDS_MBX_SIZE; i++) { 454 if (wmbi->stat != WDS_MBI_FREE) { 455 printf("%s: mbi not in round-robin order\n", 456 sc->sc_dev.dv_xname); 457 goto AGAIN; 458 } 459 wds_nextmbx(wmbi, wmbx, mbi); 460 } 461 #ifdef WDSDIAGnot 462 printf("%s: mbi interrupt with no full mailboxes\n", 463 sc->sc_dev.dv_xname); 464 #endif 465 return; 466 } 467 468 AGAIN: 469 do { 470 scb = wds_scb_phys_kv(sc, phystol(wmbi->scb_addr)); 471 if (!scb) { 472 printf("%s: bad mbi scb pointer; skipping\n", 473 sc->sc_dev.dv_xname); 474 goto next; 475 } 476 477 #ifdef WDSDEBUG 478 if (wds_debug) { 479 u_char *cp = &scb->scsipi_cmd; 480 printf("op=%x %x %x %x %x %x\n", 481 cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]); 482 printf("stat %x for mbi addr = 0x%08x, ", 483 wmbi->stat, wmbi); 484 printf("scb addr = 0x%x\n", scb); 485 } 486 #endif /* WDSDEBUG */ 487 488 untimeout(wds_timeout, scb); 489 wds_done(sc, scb, wmbi->stat); 490 491 next: 492 wmbi->stat = WDS_MBI_FREE; 493 wds_nextmbx(wmbi, wmbx, mbi); 494 } while (wmbi->stat != WDS_MBI_FREE); 495 496 wmbx->tmbi = wmbi; 497 } 498 499 /* 500 * Process an interrupt. 501 */ 502 int 503 wdsintr(arg) 504 void *arg; 505 { 506 struct wds_softc *sc = arg; 507 bus_space_tag_t iot = sc->sc_iot; 508 bus_space_handle_t ioh = sc->sc_ioh; 509 u_char c; 510 511 /* Was it really an interrupt from the board? */ 512 if ((bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_IRQ) == 0) 513 return 0; 514 515 /* Get the interrupt status byte. */ 516 c = bus_space_read_1(iot, ioh, WDS_IRQSTAT) & WDSI_MASK; 517 518 /* Acknowledge (which resets) the interrupt. */ 519 bus_space_write_1(iot, ioh, WDS_IRQACK, 0x00); 520 521 switch (c) { 522 case WDSI_MSVC: 523 wds_finish_scbs(sc); 524 break; 525 526 case WDSI_MFREE: 527 wds_start_scbs(sc); 528 break; 529 530 default: 531 printf("%s: unrecognized interrupt type %02x", 532 sc->sc_dev.dv_xname, c); 533 break; 534 } 535 536 return 1; 537 } 538 539 integrate void 540 wds_reset_scb(sc, scb) 541 struct wds_softc *sc; 542 struct wds_scb *scb; 543 { 544 545 scb->flags = 0; 546 } 547 548 /* 549 * Free the command structure, the outgoing mailbox and the data buffer. 550 */ 551 void 552 wds_free_scb(sc, scb) 553 struct wds_softc *sc; 554 struct wds_scb *scb; 555 { 556 int s; 557 558 s = splbio(); 559 560 wds_reset_scb(sc, scb); 561 TAILQ_INSERT_HEAD(&sc->sc_free_scb, scb, chain); 562 563 /* 564 * If there were none, wake anybody waiting for one to come free, 565 * starting with queued entries. 566 */ 567 if (scb->chain.tqe_next == 0) 568 wakeup(&sc->sc_free_scb); 569 570 splx(s); 571 } 572 573 integrate int 574 wds_init_scb(sc, scb) 575 struct wds_softc *sc; 576 struct wds_scb *scb; 577 { 578 bus_dma_tag_t dmat = sc->sc_dmat; 579 int hashnum, error; 580 581 /* 582 * XXX Should we put a DIAGNOSTIC check for multiple 583 * XXX SCB inits here? 584 */ 585 586 bzero(scb, sizeof(struct wds_scb)); 587 588 /* 589 * Create DMA maps for this SCB. 590 */ 591 error = bus_dmamap_create(dmat, sizeof(struct wds_scb), 1, 592 sizeof(struct wds_scb), 0, BUS_DMA_NOWAIT, &scb->dmamap_self); 593 if (error) { 594 printf("%s: can't create scb dmamap_self\n", 595 sc->sc_dev.dv_xname); 596 return (error); 597 } 598 599 error = bus_dmamap_create(dmat, WDS_MAXXFER, WDS_NSEG, WDS_MAXXFER, 600 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, &scb->dmamap_xfer); 601 if (error) { 602 printf("%s: can't create scb dmamap_xfer\n", 603 sc->sc_dev.dv_xname); 604 bus_dmamap_destroy(dmat, scb->dmamap_self); 605 return (error); 606 } 607 608 /* 609 * Load the permanent DMA maps. 610 */ 611 error = bus_dmamap_load(dmat, scb->dmamap_self, scb, 612 sizeof(struct wds_scb), NULL, BUS_DMA_NOWAIT); 613 if (error) { 614 printf("%s: can't load scb dmamap_self\n", 615 sc->sc_dev.dv_xname); 616 bus_dmamap_destroy(dmat, scb->dmamap_self); 617 bus_dmamap_destroy(dmat, scb->dmamap_xfer); 618 return (error); 619 } 620 621 /* 622 * put in the phystokv hash table 623 * Never gets taken out. 624 */ 625 scb->hashkey = scb->dmamap_self->dm_segs[0].ds_addr; 626 hashnum = SCB_HASH(scb->hashkey); 627 scb->nexthash = sc->sc_scbhash[hashnum]; 628 sc->sc_scbhash[hashnum] = scb; 629 wds_reset_scb(sc, scb); 630 return (0); 631 } 632 633 /* 634 * Create a set of scbs and add them to the free list. 635 */ 636 int 637 wds_create_scbs(sc, mem, size) 638 struct wds_softc *sc; 639 void *mem; 640 size_t size; 641 { 642 bus_dma_segment_t seg; 643 struct wds_scb *scb; 644 int rseg, error; 645 646 if (sc->sc_numscbs >= WDS_SCB_MAX) 647 return (0); 648 649 if ((scb = mem) != NULL) 650 goto have_mem; 651 652 size = NBPG; 653 error = bus_dmamem_alloc(sc->sc_dmat, size, NBPG, 0, &seg, 1, &rseg, 654 BUS_DMA_NOWAIT); 655 if (error) { 656 printf("%s: can't allocate memory for scbs\n", 657 sc->sc_dev.dv_xname); 658 return (error); 659 } 660 661 error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, size, 662 (caddr_t *)&scb, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 663 if (error) { 664 printf("%s: can't map memory for scbs\n", 665 sc->sc_dev.dv_xname); 666 bus_dmamem_free(sc->sc_dmat, &seg, rseg); 667 return (error); 668 } 669 670 have_mem: 671 bzero(scb, size); 672 while (size > sizeof(struct wds_scb) && sc->sc_numscbs < WDS_SCB_MAX) { 673 error = wds_init_scb(sc, scb); 674 if (error) { 675 printf("%s: can't initialize scb\n", 676 sc->sc_dev.dv_xname); 677 return (error); 678 } 679 TAILQ_INSERT_TAIL(&sc->sc_free_scb, scb, chain); 680 (caddr_t)scb += ALIGN(sizeof(struct wds_scb)); 681 size -= ALIGN(sizeof(struct wds_scb)); 682 sc->sc_numscbs++; 683 } 684 685 return (0); 686 } 687 688 /* 689 * Get a free scb 690 * 691 * If there are none, see if we can allocate a new one. If so, put it in 692 * the hash table too otherwise either return an error or sleep. 693 */ 694 struct wds_scb * 695 wds_get_scb(sc, flags) 696 struct wds_softc *sc; 697 int flags; 698 { 699 struct wds_scb *scb; 700 int s; 701 702 s = splbio(); 703 704 /* 705 * If we can and have to, sleep waiting for one to come free 706 * but only if we can't allocate a new one. 707 */ 708 for (;;) { 709 scb = sc->sc_free_scb.tqh_first; 710 if (scb) { 711 TAILQ_REMOVE(&sc->sc_free_scb, scb, chain); 712 break; 713 } 714 if (sc->sc_numscbs < WDS_SCB_MAX) { 715 /* 716 * wds_create_scbs() might have managed to create 717 * one before it failed. If so, don't abort, 718 * just grab it and continue to hobble along. 719 */ 720 if (wds_create_scbs(sc, NULL, 0) != 0 && 721 sc->sc_free_scb.tqh_first == NULL) { 722 printf("%s: can't allocate scbs\n", 723 sc->sc_dev.dv_xname); 724 goto out; 725 } 726 continue; 727 } 728 if ((flags & SCSI_NOSLEEP) != 0) 729 goto out; 730 tsleep(&sc->sc_free_scb, PRIBIO, "wdsscb", 0); 731 } 732 733 scb->flags |= SCB_ALLOC; 734 735 out: 736 splx(s); 737 return (scb); 738 } 739 740 struct wds_scb * 741 wds_scb_phys_kv(sc, scb_phys) 742 struct wds_softc *sc; 743 u_long scb_phys; 744 { 745 int hashnum = SCB_HASH(scb_phys); 746 struct wds_scb *scb = sc->sc_scbhash[hashnum]; 747 748 while (scb) { 749 if (scb->hashkey == scb_phys) 750 break; 751 /* XXX Check to see if it matches the sense command block. */ 752 if (scb->hashkey == (scb_phys - sizeof(struct wds_cmd))) 753 break; 754 scb = scb->nexthash; 755 } 756 return (scb); 757 } 758 759 /* 760 * Queue a SCB to be sent to the controller, and send it if possible. 761 */ 762 void 763 wds_queue_scb(sc, scb) 764 struct wds_softc *sc; 765 struct wds_scb *scb; 766 { 767 768 TAILQ_INSERT_TAIL(&sc->sc_waiting_scb, scb, chain); 769 wds_start_scbs(sc); 770 } 771 772 /* 773 * Garbage collect mailboxes that are no longer in use. 774 */ 775 void 776 wds_collect_mbo(sc) 777 struct wds_softc *sc; 778 { 779 struct wds_mbx_out *wmbo; /* Mail Box Out pointer */ 780 #ifdef WDSDIAG 781 struct wds_scb *scb; 782 #endif 783 784 wmbo = wmbx->cmbo; 785 786 while (sc->sc_mbofull > 0) { 787 if (wmbo->cmd != WDS_MBO_FREE) 788 break; 789 790 #ifdef WDSDIAG 791 scb = wds_scb_phys_kv(sc, phystol(wmbo->scb_addr)); 792 scb->flags &= ~SCB_SENDING; 793 #endif 794 795 --sc->sc_mbofull; 796 wds_nextmbx(wmbo, wmbx, mbo); 797 } 798 799 wmbx->cmbo = wmbo; 800 } 801 802 /* 803 * Send as many SCBs as we have empty mailboxes for. 804 */ 805 void 806 wds_start_scbs(sc) 807 struct wds_softc *sc; 808 { 809 bus_space_tag_t iot = sc->sc_iot; 810 bus_space_handle_t ioh = sc->sc_ioh; 811 struct wds_mbx_out *wmbo; /* Mail Box Out pointer */ 812 struct wds_scb *scb; 813 u_char c; 814 815 wmbo = wmbx->tmbo; 816 817 while ((scb = sc->sc_waiting_scb.tqh_first) != NULL) { 818 if (sc->sc_mbofull >= WDS_MBX_SIZE) { 819 wds_collect_mbo(sc); 820 if (sc->sc_mbofull >= WDS_MBX_SIZE) { 821 c = WDSC_IRQMFREE; 822 wds_cmd(iot, ioh, &c, sizeof c); 823 break; 824 } 825 } 826 827 TAILQ_REMOVE(&sc->sc_waiting_scb, scb, chain); 828 #ifdef WDSDIAG 829 scb->flags |= SCB_SENDING; 830 #endif 831 832 /* Link scb to mbo. */ 833 if (scb->flags & SCB_SENSE) 834 ltophys(scb->dmamap_self->dm_segs[0].ds_addr + 835 offsetof(struct wds_scb, sense), wmbo->scb_addr); 836 else 837 ltophys(scb->dmamap_self->dm_segs[0].ds_addr + 838 offsetof(struct wds_scb, cmd), wmbo->scb_addr); 839 /* XXX What about aborts? */ 840 wmbo->cmd = WDS_MBO_START; 841 842 /* Tell the card to poll immediately. */ 843 c = WDSC_MSTART(wmbo - wmbx->mbo); 844 wds_cmd(sc->sc_iot, sc->sc_ioh, &c, sizeof c); 845 846 if ((scb->flags & SCB_POLLED) == 0) 847 timeout(wds_timeout, scb, (scb->timeout * hz) / 1000); 848 849 ++sc->sc_mbofull; 850 wds_nextmbx(wmbo, wmbx, mbo); 851 } 852 853 wmbx->tmbo = wmbo; 854 } 855 856 /* 857 * Process the result of a SCSI command. 858 */ 859 void 860 wds_done(sc, scb, stat) 861 struct wds_softc *sc; 862 struct wds_scb *scb; 863 u_char stat; 864 { 865 bus_dma_tag_t dmat = sc->sc_dmat; 866 struct scsipi_xfer *xs = scb->xs; 867 868 /* XXXXX */ 869 870 /* Don't release the SCB if it was an internal command. */ 871 if (xs == 0) { 872 scb->flags |= SCB_DONE; 873 return; 874 } 875 876 /* Sense handling. */ 877 if (xs->error == XS_SENSE) { 878 bcopy(&scb->sense_data, &xs->sense.scsi_sense, 879 sizeof (struct scsipi_sense_data)); 880 } else { 881 /* 882 * If we were a data transfer, unload the map that described 883 * the data buffer. 884 */ 885 if (xs->datalen) { 886 bus_dmamap_sync(dmat, scb->dmamap_xfer, 0, 887 scb->dmamap_xfer->dm_mapsize, 888 (xs->flags & SCSI_DATA_IN) ? BUS_DMASYNC_POSTREAD : 889 BUS_DMASYNC_POSTWRITE); 890 bus_dmamap_unload(dmat, scb->dmamap_xfer); 891 } 892 if (xs->error == XS_NOERROR) { 893 /* If all went well, or an error is acceptable. */ 894 if (stat == WDS_MBI_OK) { 895 /* OK, set the result */ 896 xs->resid = 0; 897 } else { 898 /* Check the mailbox status. */ 899 switch (stat) { 900 case WDS_MBI_OKERR: 901 /* 902 * SCSI error recorded in scb, 903 * counts as WDS_MBI_OK 904 */ 905 switch (scb->cmd.venderr) { 906 case 0x00: 907 printf("%s: Is this " 908 "an error?\n", 909 sc->sc_dev.dv_xname); 910 /* Experiment. */ 911 xs->error = XS_DRIVER_STUFFUP; 912 break; 913 case 0x01: 914 #if 0 915 printf("%s: OK, see SCSI " 916 "error field.\n", 917 sc->sc_dev.dv_xname); 918 #endif 919 if (scb->cmd.stat == 920 SCSI_CHECK) { 921 /* Do sense. */ 922 wds_sense(sc, scb); 923 return; 924 } else if (scb->cmd.stat == 925 SCSI_BUSY) { 926 xs->error = XS_BUSY; 927 } 928 break; 929 case 0x40: 930 #if 0 931 printf("%s: DMA underrun!\n", 932 sc->sc_dev.dv_xname); 933 #endif 934 /* 935 * Hits this if the target 936 * returns fewer that datalen 937 * bytes (eg my CD-ROM, which 938 * returns a short version 939 * string, or if DMA is 940 * turned off etc. 941 */ 942 xs->resid = 0; 943 break; 944 default: 945 printf("%s: VENDOR ERROR " 946 "%02x, scsi %02x\n", 947 sc->sc_dev.dv_xname, 948 scb->cmd.venderr, 949 scb->cmd.stat); 950 /* Experiment. */ 951 xs->error = XS_DRIVER_STUFFUP; 952 break; 953 } 954 break; 955 case WDS_MBI_ETIME: 956 /* 957 * The documentation isn't clear on 958 * what conditions might generate this, 959 * but selection timeouts are the only 960 * one I can think of. 961 */ 962 xs->error = XS_SELTIMEOUT; 963 break; 964 case WDS_MBI_ERESET: 965 case WDS_MBI_ETARCMD: 966 case WDS_MBI_ERESEL: 967 case WDS_MBI_ESEL: 968 case WDS_MBI_EABORT: 969 case WDS_MBI_ESRESET: 970 case WDS_MBI_EHRESET: 971 xs->error = XS_DRIVER_STUFFUP; 972 break; 973 } 974 } 975 } /* else sense */ 976 } /* XS_NOERROR */ 977 978 wds_free_scb(sc, scb); 979 xs->flags |= ITSDONE; 980 scsipi_done(xs); 981 982 /* 983 * If there are queue entries in the software queue, try to 984 * run the first one. We should be more or less guaranteed 985 * to succeed, since we just freed a CCB. 986 * 987 * NOTE: wds_scsi_cmd() relies on our calling it with 988 * the first entry in the queue. 989 */ 990 if ((xs = sc->sc_queue.lh_first) != NULL) 991 (void) wds_scsi_cmd(xs); 992 } 993 994 int 995 wds_find(iot, ioh, sc) 996 bus_space_tag_t iot; 997 bus_space_handle_t ioh; 998 struct wds_probe_data *sc; 999 { 1000 int i; 1001 1002 /* XXXXX */ 1003 1004 /* 1005 * Sending a command causes the CMDRDY bit to clear. 1006 */ 1007 for (i = 5; i; i--) { 1008 if ((bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_RDY) != 0) 1009 break; 1010 delay(100); 1011 } 1012 if (!i) 1013 return 0; 1014 1015 bus_space_write_1(iot, ioh, WDS_CMD, WDSC_NOOP); 1016 if ((bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_RDY) != 0) 1017 return 0; 1018 1019 bus_space_write_1(iot, ioh, WDS_HCR, WDSH_SCSIRESET|WDSH_ASCRESET); 1020 delay(10000); 1021 bus_space_write_1(iot, ioh, WDS_HCR, 0x00); 1022 delay(500000); 1023 wds_wait(iot, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY); 1024 if (bus_space_read_1(iot, ioh, WDS_IRQSTAT) != 1) 1025 if (bus_space_read_1(iot, ioh, WDS_IRQSTAT) != 7) 1026 return 0; 1027 1028 for (i = 2000; i; i--) { 1029 if ((bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_RDY) != 0) 1030 break; 1031 delay(100); 1032 } 1033 if (!i) 1034 return 0; 1035 1036 if (sc) { 1037 #ifdef notyet 1038 sc->sc_irq = ...; 1039 sc->sc_drq = ...; 1040 #endif 1041 /* XXX Can we do this better? */ 1042 sc->sc_scsi_dev = 7; 1043 } 1044 1045 return 1; 1046 } 1047 1048 /* 1049 * Initialise the board and driver. 1050 */ 1051 void 1052 wds_init(sc, isreset) 1053 struct wds_softc *sc; 1054 int isreset; 1055 { 1056 bus_space_tag_t iot = sc->sc_iot; 1057 bus_space_handle_t ioh = sc->sc_ioh; 1058 bus_dma_segment_t seg; 1059 struct wds_setup init; 1060 u_char c; 1061 int i, rseg; 1062 1063 if (isreset) 1064 goto doinit; 1065 1066 /* 1067 * Allocate the mailbox. 1068 */ 1069 if (bus_dmamem_alloc(sc->sc_dmat, NBPG, NBPG, 0, &seg, 1, 1070 &rseg, BUS_DMA_NOWAIT) || 1071 bus_dmamem_map(sc->sc_dmat, &seg, rseg, NBPG, 1072 (caddr_t *)&wmbx, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) 1073 panic("wds_init: can't create or map mailbox"); 1074 1075 /* 1076 * Since DMA memory allocation is always rounded up to a 1077 * page size, create some scbs from the leftovers. 1078 */ 1079 if (wds_create_scbs(sc, ((caddr_t)wmbx) + 1080 ALIGN(sizeof(struct wds_mbx)), 1081 NBPG - ALIGN(sizeof(struct wds_mbx)))) 1082 panic("wds_init: can't create scbs"); 1083 1084 /* 1085 * Create and load the mailbox DMA map. 1086 */ 1087 if (bus_dmamap_create(sc->sc_dmat, sizeof(struct wds_mbx), 1, 1088 sizeof(struct wds_mbx), 0, BUS_DMA_NOWAIT, &sc->sc_dmamap_mbox) || 1089 bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_mbox, wmbx, 1090 sizeof(struct wds_mbx), NULL, BUS_DMA_NOWAIT)) 1091 panic("wds_ionit: can't craete or load mailbox dma map"); 1092 1093 doinit: 1094 /* 1095 * Set up initial mail box for round-robin operation. 1096 */ 1097 for (i = 0; i < WDS_MBX_SIZE; i++) { 1098 wmbx->mbo[i].cmd = WDS_MBO_FREE; 1099 wmbx->mbi[i].stat = WDS_MBI_FREE; 1100 } 1101 wmbx->cmbo = wmbx->tmbo = &wmbx->mbo[0]; 1102 wmbx->tmbi = &wmbx->mbi[0]; 1103 sc->sc_mbofull = 0; 1104 1105 init.opcode = WDSC_INIT; 1106 init.scsi_id = sc->sc_link.scsipi_scsi.adapter_target; 1107 init.buson_t = 48; 1108 init.busoff_t = 24; 1109 init.xx = 0; 1110 ltophys(sc->sc_dmamap_mbox->dm_segs[0].ds_addr, init.mbaddr); 1111 init.nomb = init.nimb = WDS_MBX_SIZE; 1112 wds_cmd(iot, ioh, (u_char *)&init, sizeof init); 1113 1114 wds_wait(iot, ioh, WDS_STAT, WDSS_INIT, WDSS_INIT); 1115 1116 c = WDSC_DISUNSOL; 1117 wds_cmd(iot, ioh, &c, sizeof c); 1118 } 1119 1120 /* 1121 * Read the board's firmware revision information. 1122 */ 1123 void 1124 wds_inquire_setup_information(sc) 1125 struct wds_softc *sc; 1126 { 1127 bus_space_tag_t iot = sc->sc_iot; 1128 bus_space_handle_t ioh = sc->sc_ioh; 1129 struct wds_scb *scb; 1130 u_char *j; 1131 int s; 1132 1133 sc->sc_maxsegs = 1; 1134 1135 scb = wds_get_scb(sc, SCSI_NOSLEEP); 1136 if (scb == 0) 1137 panic("wds_inquire_setup_information: no scb available"); 1138 1139 scb->xs = NULL; 1140 scb->timeout = 40; 1141 1142 bzero(&scb->cmd, sizeof scb->cmd); 1143 scb->cmd.write = 0x80; 1144 scb->cmd.opcode = WDSX_GETFIRMREV; 1145 1146 /* Will poll card, await result. */ 1147 bus_space_write_1(iot, ioh, WDS_HCR, WDSH_DRQEN); 1148 scb->flags |= SCB_POLLED; 1149 1150 s = splbio(); 1151 wds_queue_scb(sc, scb); 1152 splx(s); 1153 1154 if (wds_ipoll(sc, scb, scb->timeout)) 1155 goto out; 1156 1157 /* Print the version number. */ 1158 printf("%s: version %x.%02x ", sc->sc_dev.dv_xname, 1159 scb->cmd.targ, scb->cmd.scb.opcode); 1160 sc->sc_revision = (scb->cmd.targ << 8) | scb->cmd.scb.opcode; 1161 /* Print out the version string. */ 1162 j = 2 + &(scb->cmd.targ); 1163 while ((*j >= 32) && (*j < 128)) { 1164 printf("%c", *j); 1165 j++; 1166 } 1167 1168 /* 1169 * Determine if we can use scatter/gather. 1170 */ 1171 if (sc->sc_revision >= 0x800) 1172 sc->sc_maxsegs = WDS_NSEG; 1173 1174 out: 1175 printf("\n"); 1176 1177 /* 1178 * Free up the resources used by this scb. 1179 */ 1180 wds_free_scb(sc, scb); 1181 } 1182 1183 void 1184 wdsminphys(bp) 1185 struct buf *bp; 1186 { 1187 1188 if (bp->b_bcount > WDS_MAXXFER) 1189 bp->b_bcount = WDS_MAXXFER; 1190 minphys(bp); 1191 } 1192 1193 /* 1194 * Send a SCSI command. 1195 */ 1196 int 1197 wds_scsi_cmd(xs) 1198 struct scsipi_xfer *xs; 1199 { 1200 struct scsipi_link *sc_link = xs->sc_link; 1201 struct wds_softc *sc = sc_link->adapter_softc; 1202 bus_dma_tag_t dmat = sc->sc_dmat; 1203 struct wds_scb *scb; 1204 struct wds_scat_gath *sg; 1205 int error, seg, flags, s; 1206 int fromqueue = 0, dontqueue = 0; 1207 #ifdef TFS 1208 struct iovec *iovp; 1209 #endif 1210 1211 if (xs->flags & SCSI_RESET) { 1212 /* XXX Fix me! */ 1213 printf("%s: reset!\n", sc->sc_dev.dv_xname); 1214 wds_init(sc, 1); 1215 return COMPLETE; 1216 } 1217 1218 s = splbio(); /* protect the queue */ 1219 1220 /* 1221 * If we're running the queue from wds_done(), we've been 1222 * called with the first queue entry as our argument. 1223 */ 1224 if (xs == sc->sc_queue.lh_first) { 1225 xs = wds_dequeue(sc); 1226 fromqueue = 1; 1227 goto get_scb; 1228 } 1229 1230 /* Polled requests can't be queued for later. */ 1231 dontqueue = xs->flags & SCSI_POLL; 1232 1233 /* 1234 * If there are jobs in the queue, run them first. 1235 */ 1236 if (sc->sc_queue.lh_first != NULL) { 1237 /* 1238 * If we can't queue, we have to abort, since 1239 * we have to preserve order. 1240 */ 1241 if (dontqueue) { 1242 splx(s); 1243 xs->error = XS_DRIVER_STUFFUP; 1244 return (TRY_AGAIN_LATER); 1245 } 1246 1247 /* 1248 * Swap with the first queue entry. 1249 */ 1250 wds_enqueue(sc, xs, 0); 1251 xs = wds_dequeue(sc); 1252 fromqueue = 1; 1253 } 1254 1255 get_scb: 1256 flags = xs->flags; 1257 if ((scb = wds_get_scb(sc, flags)) == NULL) { 1258 /* 1259 * If we can't queue, we lose. 1260 */ 1261 if (dontqueue) { 1262 splx(s); 1263 xs->error = XS_DRIVER_STUFFUP; 1264 return (TRY_AGAIN_LATER); 1265 } 1266 1267 /* 1268 * Stuff ourselves into the queue, in front 1269 * if we came off in the first place. 1270 */ 1271 wds_enqueue(sc, xs, fromqueue); 1272 splx(s); 1273 return (SUCCESSFULLY_QUEUED); 1274 } 1275 1276 splx(s); /* done playing with the queue */ 1277 1278 scb->xs = xs; 1279 scb->timeout = xs->timeout; 1280 1281 if (xs->flags & SCSI_DATA_UIO) { 1282 /* XXX Fix me! */ 1283 /* Let's not worry about UIO. There isn't any code for the * 1284 * non-SG boards anyway! */ 1285 printf("%s: UIO is untested and disabled!\n", 1286 sc->sc_dev.dv_xname); 1287 goto bad; 1288 } 1289 1290 /* Zero out the command structure. */ 1291 bzero(&scb->cmd, sizeof scb->cmd); 1292 bcopy(xs->cmd, &scb->cmd.scb, xs->cmdlen < 12 ? xs->cmdlen : 12); 1293 1294 /* Set up some of the command fields. */ 1295 scb->cmd.targ = (xs->sc_link->scsipi_scsi.target << 5) | 1296 xs->sc_link->scsipi_scsi.lun; 1297 1298 /* NOTE: cmd.write may be OK as 0x40 (disable direction checking) 1299 * on boards other than the WD-7000V-ASE. Need this for the ASE: 1300 */ 1301 scb->cmd.write = (xs->flags & SCSI_DATA_IN) ? 0x80 : 0x00; 1302 1303 if (xs->datalen) { 1304 sg = scb->scat_gath; 1305 seg = 0; 1306 #ifdef TFS 1307 if (flags & SCSI_DATA_UIO) { 1308 error = bus_Dmamap_load_uio(dmat, 1309 scb->dmamap_xfer, (struct uio *)xs->data, 1310 (flags & SCSI_NOSLEEP) ? BUS_DMA_NOWAIT : 1311 BUS_DMA_WAITOK); 1312 } else 1313 #endif /* TFS */ 1314 { 1315 error = bus_dmamap_load(dmat, 1316 scb->dmamap_xfer, xs->data, xs->datalen, NULL, 1317 (flags & SCSI_NOSLEEP) ? BUS_DMA_NOWAIT : 1318 BUS_DMA_WAITOK); 1319 } 1320 1321 if (error) { 1322 if (error == EFBIG) { 1323 printf("%s: wds_scsi_cmd, more than %d" 1324 " dma segments\n", 1325 sc->sc_dev.dv_xname, sc->sc_maxsegs); 1326 } else { 1327 printf("%s: wds_scsi_cmd, error %d loading" 1328 " dma map\n", 1329 sc->sc_dev.dv_xname, error); 1330 } 1331 goto bad; 1332 } 1333 1334 bus_dmamap_sync(dmat, scb->dmamap_xfer, 0, 1335 scb->dmamap_xfer->dm_mapsize, 1336 (flags & SCSI_DATA_IN) ? BUS_DMASYNC_PREREAD : 1337 BUS_DMASYNC_PREWRITE); 1338 1339 if (sc->sc_maxsegs > 1) { 1340 /* 1341 * Load the hardware scatter/gather map with the 1342 * contents of the DMA map. 1343 */ 1344 for (seg = 0; seg < scb->dmamap_xfer->dm_nsegs; 1345 seg++) { 1346 ltophys(scb->dmamap_xfer->dm_segs[seg].ds_addr, 1347 scb->scat_gath[seg].seg_addr); 1348 ltophys(scb->dmamap_xfer->dm_segs[seg].ds_len, 1349 scb->scat_gath[seg].seg_len); 1350 } 1351 1352 /* 1353 * Set up for scatter/gather transfer. 1354 */ 1355 scb->cmd.opcode = WDSX_SCSISG; 1356 ltophys(scb->dmamap_self->dm_segs[0].ds_addr + 1357 offsetof(struct wds_scb, scat_gath), 1358 scb->cmd.data); 1359 ltophys(scb->dmamap_self->dm_nsegs * 1360 sizeof(struct wds_scat_gath), scb->cmd.len); 1361 } else { 1362 /* 1363 * This board is an ASC or an ASE, and the 1364 * transfer has been mapped contig for us. 1365 */ 1366 scb->cmd.opcode = WDSX_SCSICMD; 1367 ltophys(scb->dmamap_xfer->dm_segs[0].ds_addr, 1368 scb->cmd.data); 1369 ltophys(scb->dmamap_xfer->dm_segs[0].ds_len, 1370 scb->cmd.len); 1371 } 1372 } else { 1373 scb->cmd.opcode = WDSX_SCSICMD; 1374 ltophys(0, scb->cmd.data); 1375 ltophys(0, scb->cmd.len); 1376 } 1377 1378 scb->cmd.stat = 0x00; 1379 scb->cmd.venderr = 0x00; 1380 ltophys(0, scb->cmd.link); 1381 1382 /* XXX Do we really want to do this? */ 1383 if (flags & SCSI_POLL) { 1384 /* Will poll card, await result. */ 1385 bus_space_write_1(sc->sc_iot, sc->sc_ioh, WDS_HCR, WDSH_DRQEN); 1386 scb->flags |= SCB_POLLED; 1387 } else { 1388 /* Will send command, let interrupt routine handle result. */ 1389 bus_space_write_1(sc->sc_iot, sc->sc_ioh, WDS_HCR, 1390 WDSH_IRQEN | WDSH_DRQEN); 1391 } 1392 1393 s = splbio(); 1394 wds_queue_scb(sc, scb); 1395 splx(s); 1396 1397 if ((flags & SCSI_POLL) == 0) 1398 return SUCCESSFULLY_QUEUED; 1399 1400 if (wds_poll(sc, xs, scb->timeout)) { 1401 wds_timeout(scb); 1402 if (wds_poll(sc, xs, scb->timeout)) 1403 wds_timeout(scb); 1404 } 1405 return COMPLETE; 1406 1407 bad: 1408 xs->error = XS_DRIVER_STUFFUP; 1409 wds_free_scb(sc, scb); 1410 return COMPLETE; 1411 } 1412 1413 /* 1414 * Send a sense request. 1415 */ 1416 void 1417 wds_sense(sc, scb) 1418 struct wds_softc *sc; 1419 struct wds_scb *scb; 1420 { 1421 struct scsipi_xfer *xs = scb->xs; 1422 struct scsipi_sense *ss = (void *)&scb->sense.scb; 1423 int s; 1424 1425 /* XXXXX */ 1426 1427 /* Send sense request SCSI command. */ 1428 xs->error = XS_SENSE; 1429 scb->flags |= SCB_SENSE; 1430 1431 /* Next, setup a request sense command block */ 1432 bzero(ss, sizeof(*ss)); 1433 ss->opcode = REQUEST_SENSE; 1434 ss->byte2 = xs->sc_link->scsipi_scsi.lun << 5; 1435 ss->length = sizeof(struct scsipi_sense_data); 1436 1437 /* Set up some of the command fields. */ 1438 scb->sense.targ = scb->cmd.targ; 1439 scb->sense.write = 0x80; 1440 scb->sense.opcode = WDSX_SCSICMD; 1441 ltophys(scb->dmamap_self->dm_segs[0].ds_addr + 1442 offsetof(struct wds_scb, sense_data), scb->sense.data); 1443 ltophys(sizeof(struct scsipi_sense_data), scb->sense.len); 1444 1445 s = splbio(); 1446 wds_queue_scb(sc, scb); 1447 splx(s); 1448 1449 /* 1450 * There's no reason for us to poll here. There are two cases: 1451 * 1) If it's a polling operation, then we're called from the interrupt 1452 * handler, and we return and continue polling. 1453 * 2) If it's an interrupt-driven operation, then it gets completed 1454 * later on when the REQUEST SENSE finishes. 1455 */ 1456 } 1457 1458 /* 1459 * Poll a particular unit, looking for a particular scb 1460 */ 1461 int 1462 wds_poll(sc, xs, count) 1463 struct wds_softc *sc; 1464 struct scsipi_xfer *xs; 1465 int count; 1466 { 1467 bus_space_tag_t iot = sc->sc_iot; 1468 bus_space_handle_t ioh = sc->sc_ioh; 1469 1470 /* timeouts are in msec, so we loop in 1000 usec cycles */ 1471 while (count) { 1472 /* 1473 * If we had interrupts enabled, would we 1474 * have got an interrupt? 1475 */ 1476 if (bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_IRQ) 1477 wdsintr(sc); 1478 if (xs->flags & ITSDONE) 1479 return 0; 1480 delay(1000); /* only happens in boot so ok */ 1481 count--; 1482 } 1483 return 1; 1484 } 1485 1486 /* 1487 * Poll a particular unit, looking for a particular scb 1488 */ 1489 int 1490 wds_ipoll(sc, scb, count) 1491 struct wds_softc *sc; 1492 struct wds_scb *scb; 1493 int count; 1494 { 1495 bus_space_tag_t iot = sc->sc_iot; 1496 bus_space_handle_t ioh = sc->sc_ioh; 1497 1498 /* timeouts are in msec, so we loop in 1000 usec cycles */ 1499 while (count) { 1500 /* 1501 * If we had interrupts enabled, would we 1502 * have got an interrupt? 1503 */ 1504 if (bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_IRQ) 1505 wdsintr(sc); 1506 if (scb->flags & SCB_DONE) 1507 return 0; 1508 delay(1000); /* only happens in boot so ok */ 1509 count--; 1510 } 1511 return 1; 1512 } 1513 1514 void 1515 wds_timeout(arg) 1516 void *arg; 1517 { 1518 struct wds_scb *scb = arg; 1519 struct scsipi_xfer *xs = scb->xs; 1520 struct scsipi_link *sc_link = xs->sc_link; 1521 struct wds_softc *sc = sc_link->adapter_softc; 1522 int s; 1523 1524 scsi_print_addr(sc_link); 1525 printf("timed out"); 1526 1527 s = splbio(); 1528 1529 #ifdef WDSDIAG 1530 /* 1531 * If The scb's mbx is not free, then the board has gone south? 1532 */ 1533 wds_collect_mbo(sc); 1534 if (scb->flags & SCB_SENDING) { 1535 printf("%s: not taking commands!\n", sc->sc_dev.dv_xname); 1536 Debugger(); 1537 } 1538 #endif 1539 1540 /* 1541 * If it has been through before, then 1542 * a previous abort has failed, don't 1543 * try abort again 1544 */ 1545 if (scb->flags & SCB_ABORT) { 1546 /* abort timed out */ 1547 printf(" AGAIN\n"); 1548 /* XXX Must reset! */ 1549 } else { 1550 /* abort the operation that has timed out */ 1551 printf("\n"); 1552 scb->xs->error = XS_TIMEOUT; 1553 scb->timeout = WDS_ABORT_TIMEOUT; 1554 scb->flags |= SCB_ABORT; 1555 wds_queue_scb(sc, scb); 1556 } 1557 1558 splx(s); 1559 } 1560
Indexes created Wed Oct 22 13:09:56 GMT 2025