wds.c revision 1.64
1 /* $NetBSD: wds.c,v 1.64 2006/10/12 01:31:17 christos Exp $ */ 2 3 /* 4 * XXX 5 * aborts 6 * resets 7 */ 8 9 /*- 10 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 11 * All rights reserved. 12 * 13 * This code is derived from software contributed to The NetBSD Foundation 14 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 15 * NASA Ames Research Center. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 3. All advertising materials mentioning features or use of this software 26 * must display the following acknowledgement: 27 * This product includes software developed by the NetBSD 28 * Foundation, Inc. and its contributors. 29 * 4. Neither the name of The NetBSD Foundation nor the names of its 30 * contributors may be used to endorse or promote products derived 31 * from this software without specific prior written permission. 32 * 33 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 34 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 35 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 36 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 37 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 38 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 39 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 40 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 41 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 42 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 43 * POSSIBILITY OF SUCH DAMAGE. 44 */ 45 46 /* 47 * Copyright (c) 1994, 1995 Julian Highfield. All rights reserved. 48 * Portions copyright (c) 1994, 1996, 1997 49 * Charles M. Hannum. All rights reserved. 50 * 51 * Redistribution and use in source and binary forms, with or without 52 * modification, are permitted provided that the following conditions 53 * are met: 54 * 1. Redistributions of source code must retain the above copyright 55 * notice, this list of conditions and the following disclaimer. 56 * 2. Redistributions in binary form must reproduce the above copyright 57 * notice, this list of conditions and the following disclaimer in the 58 * documentation and/or other materials provided with the distribution. 59 * 3. All advertising materials mentioning features or use of this software 60 * must display the following acknowledgement: 61 * This product includes software developed by Julian Highfield. 62 * 4. The name of the author may not be used to endorse or promote products 63 * derived from this software without specific prior written permission. 64 * 65 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 66 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 67 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 68 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 69 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 70 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 71 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 72 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 73 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 74 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 75 */ 76 77 /* 78 * This driver is for the WD7000 family of SCSI controllers: 79 * the WD7000-ASC, a bus-mastering DMA controller, 80 * the WD7000-FASST2, an -ASC with new firmware and scatter-gather, 81 * and the WD7000-ASE, which was custom manufactured for Apollo 82 * workstations and seems to include an -ASC as well as floppy 83 * and ESDI interfaces. 84 * 85 * Loosely based on Theo Deraadt's unfinished attempt. 86 */ 87 88 #include <sys/cdefs.h> 89 __KERNEL_RCSID(0, "$NetBSD: wds.c,v 1.64 2006/10/12 01:31:17 christos Exp $"); 90 91 #include "opt_ddb.h" 92 93 #undef WDSDIAG 94 #ifdef DDB 95 #define integrate 96 #else 97 #define integrate static inline 98 #endif 99 100 #include <sys/param.h> 101 #include <sys/systm.h> 102 #include <sys/kernel.h> 103 #include <sys/errno.h> 104 #include <sys/ioctl.h> 105 #include <sys/device.h> 106 #include <sys/malloc.h> 107 #include <sys/buf.h> 108 #include <sys/proc.h> 109 #include <sys/user.h> 110 111 #include <uvm/uvm_extern.h> 112 113 #include <machine/bus.h> 114 #include <machine/intr.h> 115 116 #include <dev/scsipi/scsi_all.h> 117 #include <dev/scsipi/scsipi_all.h> 118 #include <dev/scsipi/scsiconf.h> 119 120 #include <dev/isa/isavar.h> 121 #include <dev/isa/isadmavar.h> 122 123 #include <dev/isa/wdsreg.h> 124 125 #define WDS_ISA_IOSIZE 8 126 127 #ifndef DDB 128 #define Debugger() panic("should call debugger here (wds.c)") 129 #endif /* ! DDB */ 130 131 #define WDS_MAXXFER ((WDS_NSEG - 1) << PGSHIFT) 132 133 #define WDS_MBX_SIZE 16 134 135 #define WDS_SCB_MAX 32 136 #define SCB_HASH_SIZE 32 /* hash table size for phystokv */ 137 #define SCB_HASH_SHIFT 9 138 #define SCB_HASH(x) ((((long)(x))>>SCB_HASH_SHIFT) & (SCB_HASH_SIZE - 1)) 139 140 #define wds_nextmbx(wmb, mbx, mbio) \ 141 if ((wmb) == &(mbx)->mbio[WDS_MBX_SIZE - 1]) \ 142 (wmb) = &(mbx)->mbio[0]; \ 143 else \ 144 (wmb)++; 145 146 struct wds_mbx { 147 struct wds_mbx_out mbo[WDS_MBX_SIZE]; 148 struct wds_mbx_in mbi[WDS_MBX_SIZE]; 149 struct wds_mbx_out *cmbo; /* Collection Mail Box out */ 150 struct wds_mbx_out *tmbo; /* Target Mail Box out */ 151 struct wds_mbx_in *tmbi; /* Target Mail Box in */ 152 }; 153 154 struct wds_softc { 155 struct device sc_dev; 156 157 bus_space_tag_t sc_iot; 158 bus_space_handle_t sc_ioh; 159 bus_dma_tag_t sc_dmat; 160 bus_dmamap_t sc_dmamap_mbox; /* maps the mailbox */ 161 void *sc_ih; 162 163 struct wds_mbx *sc_mbx; 164 #define wmbx (sc->sc_mbx) 165 struct wds_scb *sc_scbhash[SCB_HASH_SIZE]; 166 TAILQ_HEAD(, wds_scb) sc_free_scb, sc_waiting_scb; 167 int sc_numscbs, sc_mbofull; 168 169 struct scsipi_adapter sc_adapter; 170 struct scsipi_channel sc_channel; 171 172 int sc_revision; 173 int sc_maxsegs; 174 }; 175 176 struct wds_probe_data { 177 #ifdef notyet 178 int sc_irq, sc_drq; 179 #endif 180 int sc_scsi_dev; 181 }; 182 183 integrate void 184 wds_wait(bus_space_tag_t, bus_space_handle_t, int, int, int); 185 int wds_cmd(bus_space_tag_t, bus_space_handle_t, u_char *, int); 186 integrate void wds_finish_scbs(struct wds_softc *); 187 int wdsintr(void *); 188 integrate void wds_reset_scb(struct wds_softc *, struct wds_scb *); 189 void wds_free_scb(struct wds_softc *, struct wds_scb *); 190 integrate int wds_init_scb(struct wds_softc *, struct wds_scb *); 191 struct wds_scb *wds_get_scb(struct wds_softc *); 192 struct wds_scb *wds_scb_phys_kv(struct wds_softc *, u_long); 193 void wds_queue_scb(struct wds_softc *, struct wds_scb *); 194 void wds_collect_mbo(struct wds_softc *); 195 void wds_start_scbs(struct wds_softc *); 196 void wds_done(struct wds_softc *, struct wds_scb *, u_char); 197 int wds_find(bus_space_tag_t, bus_space_handle_t, struct wds_probe_data *); 198 void wds_attach(struct wds_softc *, struct wds_probe_data *); 199 void wds_init(struct wds_softc *, int); 200 void wds_inquire_setup_information(struct wds_softc *); 201 void wdsminphys(struct buf *); 202 void wds_scsipi_request(struct scsipi_channel *, 203 scsipi_adapter_req_t, void *); 204 int wds_poll(struct wds_softc *, struct scsipi_xfer *, int); 205 int wds_ipoll(struct wds_softc *, struct wds_scb *, int); 206 void wds_timeout(void *); 207 int wds_create_scbs(struct wds_softc *, void *, size_t); 208 209 int wdsprobe(struct device *, struct cfdata *, void *); 210 void wdsattach(struct device *, struct device *, void *); 211 212 CFATTACH_DECL(wds, sizeof(struct wds_softc), 213 wdsprobe, wdsattach, NULL, NULL); 214 215 #ifdef WDSDEBUG 216 int wds_debug = 0; 217 #endif 218 219 #define WDS_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */ 220 221 integrate void 222 wds_wait(iot, ioh, port, mask, val) 223 bus_space_tag_t iot; 224 bus_space_handle_t ioh; 225 int port; 226 int mask, val; 227 { 228 229 while ((bus_space_read_1(iot, ioh, port) & mask) != val) 230 ; 231 } 232 233 /* 234 * Write a command to the board's I/O ports. 235 */ 236 int 237 wds_cmd(iot, ioh, ibuf, icnt) 238 bus_space_tag_t iot; 239 bus_space_handle_t ioh; 240 u_char *ibuf; 241 int icnt; 242 { 243 u_char c; 244 245 wds_wait(iot, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY); 246 247 while (icnt--) { 248 bus_space_write_1(iot, ioh, WDS_CMD, *ibuf++); 249 wds_wait(iot, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY); 250 c = bus_space_read_1(iot, ioh, WDS_STAT); 251 if (c & WDSS_REJ) 252 return 1; 253 } 254 255 return 0; 256 } 257 258 /* 259 * Check for the presence of a WD7000 SCSI controller. 260 */ 261 int 262 wdsprobe(struct device *parent __unused, struct cfdata *match __unused, 263 void *aux) 264 { 265 struct isa_attach_args *ia = aux; 266 bus_space_tag_t iot = ia->ia_iot; 267 bus_space_handle_t ioh; 268 struct wds_probe_data wpd; 269 int rv; 270 271 if (ia->ia_nio < 1) 272 return (0); 273 if (ia->ia_nirq < 1) 274 return (0); 275 if (ia->ia_ndrq < 1) 276 return (0); 277 278 if (ISA_DIRECT_CONFIG(ia)) 279 return (0); 280 281 /* Disallow wildcarded i/o address. */ 282 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 283 return (0); 284 285 if (bus_space_map(iot, ia->ia_io[0].ir_addr, WDS_ISA_IOSIZE, 0, &ioh)) 286 return (0); 287 288 rv = wds_find(iot, ioh, &wpd); 289 290 bus_space_unmap(iot, ioh, WDS_ISA_IOSIZE); 291 292 if (rv) { 293 #ifdef notyet 294 if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ && 295 ia->ia_irq[0].ir_irq != wpd.sc_irq) 296 return (0); 297 if (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ && 298 ia->ia_drq[0].ir_drq != wpd.sc_drq) 299 return (0); 300 301 ia->ia_nirq = 1; 302 ia->ia_irq[0].ir_irq = wpd.sc_irq; 303 304 ia->ia_ndrq = 1; 305 ia->ia_drq[0].ir_drq = wpd.sc_drq; 306 #else 307 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 308 return (0); 309 if (ia->ia_drq[0].ir_drq == ISA_UNKNOWN_DRQ) 310 return (0); 311 312 ia->ia_nirq = 1; 313 ia->ia_ndrq = 1; 314 #endif 315 ia->ia_nio = 1; 316 ia->ia_io[0].ir_size = WDS_ISA_IOSIZE; 317 318 ia->ia_niomem = 0; 319 } 320 return (rv); 321 } 322 323 /* 324 * Attach all available units. 325 */ 326 void 327 wdsattach(struct device *parent __unused, struct device *self, void *aux) 328 { 329 struct isa_attach_args *ia = aux; 330 struct wds_softc *sc = (void *)self; 331 bus_space_tag_t iot = ia->ia_iot; 332 bus_space_handle_t ioh; 333 struct wds_probe_data wpd; 334 isa_chipset_tag_t ic = ia->ia_ic; 335 int error; 336 337 printf("\n"); 338 339 if (bus_space_map(iot, ia->ia_io[0].ir_addr, WDS_ISA_IOSIZE, 0, &ioh)) { 340 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 341 return; 342 } 343 344 sc->sc_iot = iot; 345 sc->sc_ioh = ioh; 346 sc->sc_dmat = ia->ia_dmat; 347 if (!wds_find(iot, ioh, &wpd)) { 348 printf("%s: wds_find failed\n", sc->sc_dev.dv_xname); 349 return; 350 } 351 352 bus_space_write_1(iot, ioh, WDS_HCR, WDSH_DRQEN); 353 #ifdef notyet 354 if (wpd.sc_drq != -1) { 355 if ((error = isa_dmacascade(ic, wpd.sc_drq)) != 0) { 356 printf("%s: unable to cascade DRQ, error = %d\n", 357 sc->sc_dev.dv_xname, error); 358 return; 359 } 360 } 361 362 sc->sc_ih = isa_intr_establish(ic, wpd.sc_irq, IST_EDGE, IPL_BIO, 363 wdsintr, sc); 364 #else 365 if ((error = isa_dmacascade(ic, ia->ia_drq[0].ir_drq)) != 0) { 366 printf("%s: unable to cascade DRQ, error = %d\n", 367 sc->sc_dev.dv_xname, error); 368 return; 369 } 370 371 sc->sc_ih = isa_intr_establish(ic, ia->ia_irq[0].ir_irq, IST_EDGE, 372 IPL_BIO, wdsintr, sc); 373 #endif 374 if (sc->sc_ih == NULL) { 375 printf("%s: couldn't establish interrupt\n", 376 sc->sc_dev.dv_xname); 377 return; 378 } 379 380 wds_attach(sc, &wpd); 381 } 382 383 void 384 wds_attach(sc, wpd) 385 struct wds_softc *sc; 386 struct wds_probe_data *wpd; 387 { 388 struct scsipi_adapter *adapt = &sc->sc_adapter; 389 struct scsipi_channel *chan = &sc->sc_channel; 390 391 TAILQ_INIT(&sc->sc_free_scb); 392 TAILQ_INIT(&sc->sc_waiting_scb); 393 394 /* 395 * Fill in the scsipi_adapter. 396 */ 397 memset(adapt, 0, sizeof(*adapt)); 398 adapt->adapt_dev = &sc->sc_dev; 399 adapt->adapt_nchannels = 1; 400 /* adapt_openings initialized below */ 401 adapt->adapt_max_periph = 1; 402 adapt->adapt_request = wds_scsipi_request; 403 adapt->adapt_minphys = minphys; 404 405 /* 406 * Fill in the scsipi_channel. 407 */ 408 memset(chan, 0, sizeof(*chan)); 409 chan->chan_adapter = adapt; 410 chan->chan_bustype = &scsi_bustype; 411 chan->chan_channel = 0; 412 chan->chan_ntargets = 8; 413 chan->chan_nluns = 8; 414 chan->chan_id = wpd->sc_scsi_dev; 415 416 wds_init(sc, 0); 417 wds_inquire_setup_information(sc); 418 419 /* XXX add support for GROW */ 420 adapt->adapt_openings = sc->sc_numscbs; 421 422 /* 423 * ask the adapter what subunits are present 424 */ 425 config_found(&sc->sc_dev, &sc->sc_channel, scsiprint); 426 } 427 428 integrate void 429 wds_finish_scbs(sc) 430 struct wds_softc *sc; 431 { 432 struct wds_mbx_in *wmbi; 433 struct wds_scb *scb; 434 int i; 435 436 wmbi = wmbx->tmbi; 437 438 if (wmbi->stat == WDS_MBI_FREE) { 439 for (i = 0; i < WDS_MBX_SIZE; i++) { 440 if (wmbi->stat != WDS_MBI_FREE) { 441 printf("%s: mbi not in round-robin order\n", 442 sc->sc_dev.dv_xname); 443 goto AGAIN; 444 } 445 wds_nextmbx(wmbi, wmbx, mbi); 446 } 447 #ifdef WDSDIAGnot 448 printf("%s: mbi interrupt with no full mailboxes\n", 449 sc->sc_dev.dv_xname); 450 #endif 451 return; 452 } 453 454 AGAIN: 455 do { 456 scb = wds_scb_phys_kv(sc, phystol(wmbi->scb_addr)); 457 if (!scb) { 458 printf("%s: bad mbi scb pointer; skipping\n", 459 sc->sc_dev.dv_xname); 460 goto next; 461 } 462 463 #ifdef WDSDEBUG 464 if (wds_debug) { 465 u_char *cp = scb->cmd.xx; 466 printf("op=%x %x %x %x %x %x\n", 467 cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]); 468 printf("stat %x for mbi addr = %p, ", 469 wmbi->stat, wmbi); 470 printf("scb addr = %p\n", scb); 471 } 472 #endif /* WDSDEBUG */ 473 474 callout_stop(&scb->xs->xs_callout); 475 wds_done(sc, scb, wmbi->stat); 476 477 next: 478 wmbi->stat = WDS_MBI_FREE; 479 wds_nextmbx(wmbi, wmbx, mbi); 480 } while (wmbi->stat != WDS_MBI_FREE); 481 482 wmbx->tmbi = wmbi; 483 } 484 485 /* 486 * Process an interrupt. 487 */ 488 int 489 wdsintr(arg) 490 void *arg; 491 { 492 struct wds_softc *sc = arg; 493 bus_space_tag_t iot = sc->sc_iot; 494 bus_space_handle_t ioh = sc->sc_ioh; 495 u_char c; 496 497 /* Was it really an interrupt from the board? */ 498 if ((bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_IRQ) == 0) 499 return 0; 500 501 /* Get the interrupt status byte. */ 502 c = bus_space_read_1(iot, ioh, WDS_IRQSTAT) & WDSI_MASK; 503 504 /* Acknowledge (which resets) the interrupt. */ 505 bus_space_write_1(iot, ioh, WDS_IRQACK, 0x00); 506 507 switch (c) { 508 case WDSI_MSVC: 509 wds_finish_scbs(sc); 510 break; 511 512 case WDSI_MFREE: 513 wds_start_scbs(sc); 514 break; 515 516 default: 517 printf("%s: unrecognized interrupt type %02x", 518 sc->sc_dev.dv_xname, c); 519 break; 520 } 521 522 return 1; 523 } 524 525 integrate void 526 wds_reset_scb(struct wds_softc *sc __unused, struct wds_scb *scb) 527 { 528 529 scb->flags = 0; 530 } 531 532 /* 533 * Free the command structure, the outgoing mailbox and the data buffer. 534 */ 535 void 536 wds_free_scb(sc, scb) 537 struct wds_softc *sc; 538 struct wds_scb *scb; 539 { 540 int s; 541 542 s = splbio(); 543 wds_reset_scb(sc, scb); 544 TAILQ_INSERT_HEAD(&sc->sc_free_scb, scb, chain); 545 splx(s); 546 } 547 548 integrate int 549 wds_init_scb(sc, scb) 550 struct wds_softc *sc; 551 struct wds_scb *scb; 552 { 553 bus_dma_tag_t dmat = sc->sc_dmat; 554 int hashnum, error; 555 556 /* 557 * XXX Should we put a DIAGNOSTIC check for multiple 558 * XXX SCB inits here? 559 */ 560 561 memset(scb, 0, sizeof(struct wds_scb)); 562 563 /* 564 * Create DMA maps for this SCB. 565 */ 566 error = bus_dmamap_create(dmat, sizeof(struct wds_scb), 1, 567 sizeof(struct wds_scb), 0, BUS_DMA_NOWAIT, &scb->dmamap_self); 568 if (error) { 569 printf("%s: can't create scb dmamap_self\n", 570 sc->sc_dev.dv_xname); 571 return (error); 572 } 573 574 error = bus_dmamap_create(dmat, WDS_MAXXFER, WDS_NSEG, WDS_MAXXFER, 575 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, &scb->dmamap_xfer); 576 if (error) { 577 printf("%s: can't create scb dmamap_xfer\n", 578 sc->sc_dev.dv_xname); 579 bus_dmamap_destroy(dmat, scb->dmamap_self); 580 return (error); 581 } 582 583 /* 584 * Load the permanent DMA maps. 585 */ 586 error = bus_dmamap_load(dmat, scb->dmamap_self, scb, 587 sizeof(struct wds_scb), NULL, BUS_DMA_NOWAIT); 588 if (error) { 589 printf("%s: can't load scb dmamap_self\n", 590 sc->sc_dev.dv_xname); 591 bus_dmamap_destroy(dmat, scb->dmamap_self); 592 bus_dmamap_destroy(dmat, scb->dmamap_xfer); 593 return (error); 594 } 595 596 /* 597 * put in the phystokv hash table 598 * Never gets taken out. 599 */ 600 scb->hashkey = scb->dmamap_self->dm_segs[0].ds_addr; 601 hashnum = SCB_HASH(scb->hashkey); 602 scb->nexthash = sc->sc_scbhash[hashnum]; 603 sc->sc_scbhash[hashnum] = scb; 604 wds_reset_scb(sc, scb); 605 return (0); 606 } 607 608 /* 609 * Create a set of scbs and add them to the free list. 610 */ 611 int 612 wds_create_scbs(sc, mem, size) 613 struct wds_softc *sc; 614 void *mem; 615 size_t size; 616 { 617 bus_dma_segment_t seg; 618 struct wds_scb *scb; 619 int rseg, error; 620 621 if (sc->sc_numscbs >= WDS_SCB_MAX) 622 return (0); 623 624 if ((scb = mem) != NULL) 625 goto have_mem; 626 627 size = PAGE_SIZE; 628 error = bus_dmamem_alloc(sc->sc_dmat, size, PAGE_SIZE, 0, &seg, 629 1, &rseg, BUS_DMA_NOWAIT); 630 if (error) { 631 printf("%s: can't allocate memory for scbs\n", 632 sc->sc_dev.dv_xname); 633 return (error); 634 } 635 636 error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, size, 637 (void *)&scb, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 638 if (error) { 639 printf("%s: can't map memory for scbs\n", 640 sc->sc_dev.dv_xname); 641 bus_dmamem_free(sc->sc_dmat, &seg, rseg); 642 return (error); 643 } 644 645 have_mem: 646 memset(scb, 0, size); 647 while (size > sizeof(struct wds_scb) && sc->sc_numscbs < WDS_SCB_MAX) { 648 error = wds_init_scb(sc, scb); 649 if (error) { 650 printf("%s: can't initialize scb\n", 651 sc->sc_dev.dv_xname); 652 return (error); 653 } 654 TAILQ_INSERT_TAIL(&sc->sc_free_scb, scb, chain); 655 scb = (struct wds_scb *)((caddr_t)scb + 656 ALIGN(sizeof(struct wds_scb))); 657 size -= ALIGN(sizeof(struct wds_scb)); 658 sc->sc_numscbs++; 659 } 660 661 return (0); 662 } 663 664 /* 665 * Get a free scb 666 * 667 * If there are none, see if we can allocate a new one. If so, put it in 668 * the hash table too otherwise either return an error or sleep. 669 */ 670 struct wds_scb * 671 wds_get_scb(sc) 672 struct wds_softc *sc; 673 { 674 struct wds_scb *scb; 675 int s; 676 677 s = splbio(); 678 scb = TAILQ_FIRST(&sc->sc_free_scb); 679 if (scb != NULL) { 680 TAILQ_REMOVE(&sc->sc_free_scb, scb, chain); 681 scb->flags |= SCB_ALLOC; 682 } 683 splx(s); 684 return (scb); 685 } 686 687 struct wds_scb * 688 wds_scb_phys_kv(sc, scb_phys) 689 struct wds_softc *sc; 690 u_long scb_phys; 691 { 692 int hashnum = SCB_HASH(scb_phys); 693 struct wds_scb *scb = sc->sc_scbhash[hashnum]; 694 695 while (scb) { 696 if (scb->hashkey == scb_phys) 697 break; 698 /* XXX Check to see if it matches the sense command block. */ 699 if (scb->hashkey == (scb_phys - sizeof(struct wds_cmd))) 700 break; 701 scb = scb->nexthash; 702 } 703 return (scb); 704 } 705 706 /* 707 * Queue a SCB to be sent to the controller, and send it if possible. 708 */ 709 void 710 wds_queue_scb(sc, scb) 711 struct wds_softc *sc; 712 struct wds_scb *scb; 713 { 714 715 TAILQ_INSERT_TAIL(&sc->sc_waiting_scb, scb, chain); 716 wds_start_scbs(sc); 717 } 718 719 /* 720 * Garbage collect mailboxes that are no longer in use. 721 */ 722 void 723 wds_collect_mbo(sc) 724 struct wds_softc *sc; 725 { 726 struct wds_mbx_out *wmbo; /* Mail Box Out pointer */ 727 #ifdef WDSDIAG 728 struct wds_scb *scb; 729 #endif 730 731 wmbo = wmbx->cmbo; 732 733 while (sc->sc_mbofull > 0) { 734 if (wmbo->cmd != WDS_MBO_FREE) 735 break; 736 737 #ifdef WDSDIAG 738 scb = wds_scb_phys_kv(sc, phystol(wmbo->scb_addr)); 739 scb->flags &= ~SCB_SENDING; 740 #endif 741 742 --sc->sc_mbofull; 743 wds_nextmbx(wmbo, wmbx, mbo); 744 } 745 746 wmbx->cmbo = wmbo; 747 } 748 749 /* 750 * Send as many SCBs as we have empty mailboxes for. 751 */ 752 void 753 wds_start_scbs(sc) 754 struct wds_softc *sc; 755 { 756 bus_space_tag_t iot = sc->sc_iot; 757 bus_space_handle_t ioh = sc->sc_ioh; 758 struct wds_mbx_out *wmbo; /* Mail Box Out pointer */ 759 struct wds_scb *scb; 760 u_char c; 761 762 wmbo = wmbx->tmbo; 763 764 while ((scb = sc->sc_waiting_scb.tqh_first) != NULL) { 765 if (sc->sc_mbofull >= WDS_MBX_SIZE) { 766 wds_collect_mbo(sc); 767 if (sc->sc_mbofull >= WDS_MBX_SIZE) { 768 c = WDSC_IRQMFREE; 769 wds_cmd(iot, ioh, &c, sizeof c); 770 break; 771 } 772 } 773 774 TAILQ_REMOVE(&sc->sc_waiting_scb, scb, chain); 775 #ifdef WDSDIAG 776 scb->flags |= SCB_SENDING; 777 #endif 778 779 /* Link scb to mbo. */ 780 ltophys(scb->dmamap_self->dm_segs[0].ds_addr + 781 offsetof(struct wds_scb, cmd), wmbo->scb_addr); 782 /* XXX What about aborts? */ 783 wmbo->cmd = WDS_MBO_START; 784 785 /* Tell the card to poll immediately. */ 786 c = WDSC_MSTART(wmbo - wmbx->mbo); 787 wds_cmd(sc->sc_iot, sc->sc_ioh, &c, sizeof c); 788 789 if ((scb->flags & SCB_POLLED) == 0) 790 callout_reset(&scb->xs->xs_callout, 791 mstohz(scb->timeout), wds_timeout, scb); 792 793 ++sc->sc_mbofull; 794 wds_nextmbx(wmbo, wmbx, mbo); 795 } 796 797 wmbx->tmbo = wmbo; 798 } 799 800 /* 801 * Process the result of a SCSI command. 802 */ 803 void 804 wds_done(sc, scb, stat) 805 struct wds_softc *sc; 806 struct wds_scb *scb; 807 u_char stat; 808 { 809 bus_dma_tag_t dmat = sc->sc_dmat; 810 struct scsipi_xfer *xs = scb->xs; 811 812 /* XXXXX */ 813 814 /* Don't release the SCB if it was an internal command. */ 815 if (xs == 0) { 816 scb->flags |= SCB_DONE; 817 return; 818 } 819 820 /* 821 * If we were a data transfer, unload the map that described 822 * the data buffer. 823 */ 824 if (xs->datalen) { 825 bus_dmamap_sync(dmat, scb->dmamap_xfer, 0, 826 scb->dmamap_xfer->dm_mapsize, 827 (xs->xs_control & XS_CTL_DATA_IN) ? 828 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 829 bus_dmamap_unload(dmat, scb->dmamap_xfer); 830 } 831 if (xs->error == XS_NOERROR) { 832 /* If all went well, or an error is acceptable. */ 833 if (stat == WDS_MBI_OK) { 834 /* OK, set the result */ 835 xs->resid = 0; 836 } else { 837 /* Check the mailbox status. */ 838 switch (stat) { 839 case WDS_MBI_OKERR: 840 /* 841 * SCSI error recorded in scb, 842 * counts as WDS_MBI_OK 843 */ 844 switch (scb->cmd.venderr) { 845 case 0x00: 846 printf("%s: Is this " 847 "an error?\n", 848 sc->sc_dev.dv_xname); 849 /* Experiment. */ 850 xs->error = XS_DRIVER_STUFFUP; 851 break; 852 case 0x01: 853 #if 0 854 printf("%s: OK, see SCSI " 855 "error field.\n", 856 sc->sc_dev.dv_xname); 857 #endif 858 if (scb->cmd.stat == SCSI_CHECK || 859 scb->cmd.stat == SCSI_BUSY) { 860 xs->status = scb->cmd.stat; 861 xs->error = XS_BUSY; 862 } 863 break; 864 case 0x40: 865 #if 0 866 printf("%s: DMA underrun!\n", 867 sc->sc_dev.dv_xname); 868 #endif 869 /* 870 * Hits this if the target 871 * returns fewer that datalen 872 * bytes (eg my CD-ROM, which 873 * returns a short version 874 * string, or if DMA is 875 * turned off etc. 876 */ 877 xs->resid = 0; 878 break; 879 default: 880 printf("%s: VENDOR ERROR " 881 "%02x, scsi %02x\n", 882 sc->sc_dev.dv_xname, 883 scb->cmd.venderr, 884 scb->cmd.stat); 885 /* Experiment. */ 886 xs->error = XS_DRIVER_STUFFUP; 887 break; 888 } 889 break; 890 case WDS_MBI_ETIME: 891 /* 892 * The documentation isn't clear on 893 * what conditions might generate this, 894 * but selection timeouts are the only 895 * one I can think of. 896 */ 897 xs->error = XS_SELTIMEOUT; 898 break; 899 case WDS_MBI_ERESET: 900 case WDS_MBI_ETARCMD: 901 case WDS_MBI_ERESEL: 902 case WDS_MBI_ESEL: 903 case WDS_MBI_EABORT: 904 case WDS_MBI_ESRESET: 905 case WDS_MBI_EHRESET: 906 xs->error = XS_DRIVER_STUFFUP; 907 break; 908 } 909 } 910 } /* XS_NOERROR */ 911 912 wds_free_scb(sc, scb); 913 scsipi_done(xs); 914 } 915 916 int 917 wds_find(iot, ioh, sc) 918 bus_space_tag_t iot; 919 bus_space_handle_t ioh; 920 struct wds_probe_data *sc; 921 { 922 int i; 923 924 /* XXXXX */ 925 926 /* 927 * Sending a command causes the CMDRDY bit to clear. 928 */ 929 for (i = 5; i; i--) { 930 if ((bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_RDY) != 0) 931 break; 932 delay(100); 933 } 934 if (!i) 935 return 0; 936 937 bus_space_write_1(iot, ioh, WDS_CMD, WDSC_NOOP); 938 if ((bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_RDY) != 0) 939 return 0; 940 941 bus_space_write_1(iot, ioh, WDS_HCR, WDSH_SCSIRESET|WDSH_ASCRESET); 942 delay(10000); 943 bus_space_write_1(iot, ioh, WDS_HCR, 0x00); 944 delay(500000); 945 wds_wait(iot, ioh, WDS_STAT, WDSS_RDY, WDSS_RDY); 946 if (bus_space_read_1(iot, ioh, WDS_IRQSTAT) != 1) 947 if (bus_space_read_1(iot, ioh, WDS_IRQSTAT) != 7) 948 return 0; 949 950 for (i = 2000; i; i--) { 951 if ((bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_RDY) != 0) 952 break; 953 delay(100); 954 } 955 if (!i) 956 return 0; 957 958 if (sc) { 959 #ifdef notyet 960 sc->sc_irq = ...; 961 sc->sc_drq = ...; 962 #endif 963 /* XXX Can we do this better? */ 964 sc->sc_scsi_dev = 7; 965 } 966 967 return 1; 968 } 969 970 /* 971 * Initialise the board and driver. 972 */ 973 void 974 wds_init(sc, isreset) 975 struct wds_softc *sc; 976 int isreset; 977 { 978 bus_space_tag_t iot = sc->sc_iot; 979 bus_space_handle_t ioh = sc->sc_ioh; 980 bus_dma_segment_t seg; 981 struct wds_setup init; 982 u_char c; 983 int i, rseg; 984 985 if (isreset) 986 goto doinit; 987 988 /* 989 * Allocate the mailbox. 990 */ 991 if (bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE, PAGE_SIZE, 0, &seg, 1, 992 &rseg, BUS_DMA_NOWAIT) || 993 bus_dmamem_map(sc->sc_dmat, &seg, rseg, PAGE_SIZE, 994 (caddr_t *)&wmbx, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) 995 panic("wds_init: can't create or map mailbox"); 996 997 /* 998 * Since DMA memory allocation is always rounded up to a 999 * page size, create some scbs from the leftovers. 1000 */ 1001 if (wds_create_scbs(sc, ((caddr_t)wmbx) + 1002 ALIGN(sizeof(struct wds_mbx)), 1003 PAGE_SIZE - ALIGN(sizeof(struct wds_mbx)))) 1004 panic("wds_init: can't create scbs"); 1005 1006 /* 1007 * Create and load the mailbox DMA map. 1008 */ 1009 if (bus_dmamap_create(sc->sc_dmat, sizeof(struct wds_mbx), 1, 1010 sizeof(struct wds_mbx), 0, BUS_DMA_NOWAIT, &sc->sc_dmamap_mbox) || 1011 bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_mbox, wmbx, 1012 sizeof(struct wds_mbx), NULL, BUS_DMA_NOWAIT)) 1013 panic("wds_ionit: can't create or load mailbox DMA map"); 1014 1015 doinit: 1016 /* 1017 * Set up initial mail box for round-robin operation. 1018 */ 1019 for (i = 0; i < WDS_MBX_SIZE; i++) { 1020 wmbx->mbo[i].cmd = WDS_MBO_FREE; 1021 wmbx->mbi[i].stat = WDS_MBI_FREE; 1022 } 1023 wmbx->cmbo = wmbx->tmbo = &wmbx->mbo[0]; 1024 wmbx->tmbi = &wmbx->mbi[0]; 1025 sc->sc_mbofull = 0; 1026 1027 init.opcode = WDSC_INIT; 1028 init.scsi_id = sc->sc_channel.chan_id; 1029 init.buson_t = 48; 1030 init.busoff_t = 24; 1031 init.xx = 0; 1032 ltophys(sc->sc_dmamap_mbox->dm_segs[0].ds_addr, init.mbaddr); 1033 init.nomb = init.nimb = WDS_MBX_SIZE; 1034 wds_cmd(iot, ioh, (u_char *)&init, sizeof init); 1035 1036 wds_wait(iot, ioh, WDS_STAT, WDSS_INIT, WDSS_INIT); 1037 1038 c = WDSC_DISUNSOL; 1039 wds_cmd(iot, ioh, &c, sizeof c); 1040 } 1041 1042 /* 1043 * Read the board's firmware revision information. 1044 */ 1045 void 1046 wds_inquire_setup_information(sc) 1047 struct wds_softc *sc; 1048 { 1049 bus_space_tag_t iot = sc->sc_iot; 1050 bus_space_handle_t ioh = sc->sc_ioh; 1051 struct wds_scb *scb; 1052 u_char *j; 1053 int s; 1054 1055 sc->sc_maxsegs = 1; 1056 1057 scb = wds_get_scb(sc); 1058 if (scb == 0) 1059 panic("wds_inquire_setup_information: no scb available"); 1060 1061 scb->xs = NULL; 1062 scb->timeout = 40; 1063 1064 memset(&scb->cmd, 0, sizeof scb->cmd); 1065 scb->cmd.write = 0x80; 1066 scb->cmd.opcode = WDSX_GETFIRMREV; 1067 1068 /* Will poll card, await result. */ 1069 bus_space_write_1(iot, ioh, WDS_HCR, WDSH_DRQEN); 1070 scb->flags |= SCB_POLLED; 1071 1072 s = splbio(); 1073 wds_queue_scb(sc, scb); 1074 splx(s); 1075 1076 if (wds_ipoll(sc, scb, scb->timeout)) 1077 goto out; 1078 1079 /* Print the version number. */ 1080 printf("%s: version %x.%02x ", sc->sc_dev.dv_xname, 1081 scb->cmd.targ, scb->cmd.scb[0]); 1082 sc->sc_revision = (scb->cmd.targ << 8) | scb->cmd.scb[0]; 1083 /* Print out the version string. */ 1084 j = 2 + &(scb->cmd.targ); 1085 while ((*j >= 32) && (*j < 128)) { 1086 printf("%c", *j); 1087 j++; 1088 } 1089 1090 /* 1091 * Determine if we can use scatter/gather. 1092 */ 1093 if (sc->sc_revision >= 0x800) 1094 sc->sc_maxsegs = WDS_NSEG; 1095 1096 out: 1097 printf("\n"); 1098 1099 /* 1100 * Free up the resources used by this scb. 1101 */ 1102 wds_free_scb(sc, scb); 1103 } 1104 1105 void 1106 wdsminphys(bp) 1107 struct buf *bp; 1108 { 1109 1110 if (bp->b_bcount > WDS_MAXXFER) 1111 bp->b_bcount = WDS_MAXXFER; 1112 minphys(bp); 1113 } 1114 1115 /* 1116 * Send a SCSI command. 1117 */ 1118 void 1119 wds_scsipi_request(chan, req, arg) 1120 struct scsipi_channel *chan; 1121 scsipi_adapter_req_t req; 1122 void *arg; 1123 { 1124 struct scsipi_xfer *xs; 1125 struct scsipi_periph *periph; 1126 struct wds_softc *sc = (void *)chan->chan_adapter->adapt_dev; 1127 bus_dma_tag_t dmat = sc->sc_dmat; 1128 struct wds_scb *scb; 1129 int error, seg, flags, s; 1130 1131 switch (req) { 1132 case ADAPTER_REQ_RUN_XFER: 1133 xs = arg; 1134 periph = xs->xs_periph; 1135 1136 if (xs->xs_control & XS_CTL_RESET) { 1137 /* XXX Fix me! */ 1138 printf("%s: reset!\n", sc->sc_dev.dv_xname); 1139 wds_init(sc, 1); 1140 scsipi_done(xs); 1141 return; 1142 } 1143 1144 if (xs->xs_control & XS_CTL_DATA_UIO) { 1145 /* XXX Fix me! */ 1146 /* 1147 * Let's not worry about UIO. There isn't any code 1148 * for the non-SG boards anyway! 1149 */ 1150 printf("%s: UIO is untested and disabled!\n", 1151 sc->sc_dev.dv_xname); 1152 xs->error = XS_DRIVER_STUFFUP; 1153 scsipi_done(xs); 1154 return; 1155 } 1156 1157 flags = xs->xs_control; 1158 1159 /* Get an SCB to use. */ 1160 scb = wds_get_scb(sc); 1161 #ifdef DIAGNOSTIC 1162 /* 1163 * This should never happen as we track the resources 1164 * in the mid-layer. 1165 */ 1166 if (scb == NULL) { 1167 scsipi_printaddr(periph); 1168 printf("unable to allocate scb\n"); 1169 panic("wds_scsipi_request"); 1170 } 1171 #endif 1172 1173 scb->xs = xs; 1174 scb->timeout = xs->timeout; 1175 1176 /* Zero out the command structure. */ 1177 if (xs->cmdlen > sizeof(scb->cmd.scb)) { 1178 printf("%s: cmdlen %d too large for SCB\n", 1179 sc->sc_dev.dv_xname, xs->cmdlen); 1180 xs->error = XS_DRIVER_STUFFUP; 1181 goto out_bad; 1182 } 1183 memset(&scb->cmd, 0, sizeof scb->cmd); 1184 memcpy(&scb->cmd.scb, xs->cmd, xs->cmdlen); 1185 1186 /* Set up some of the command fields. */ 1187 scb->cmd.targ = (periph->periph_target << 5) | 1188 periph->periph_lun; 1189 1190 /* 1191 * NOTE: cmd.write may be OK as 0x40 (disable direction 1192 * checking) on boards other than the WD-7000V-ASE. Need 1193 * this for the ASE: 1194 */ 1195 scb->cmd.write = (xs->xs_control & XS_CTL_DATA_IN) ? 1196 0x80 : 0x00; 1197 1198 if (xs->datalen) { 1199 seg = 0; 1200 #ifdef TFS 1201 if (flags & XS_CTL_DATA_UIO) { 1202 error = bus_dmamap_load_uio(dmat, 1203 scb->dmamap_xfer, (struct uio *)xs->data, 1204 BUS_DMA_NOWAIT | 1205 ((flags & XS_CTL_DATA_IN) ? BUS_DMA_READ : 1206 BUS_DMA_WRITE)); 1207 } else 1208 #endif /* TFS */ 1209 { 1210 error = bus_dmamap_load(dmat, 1211 scb->dmamap_xfer, xs->data, xs->datalen, 1212 NULL, BUS_DMA_NOWAIT | 1213 ((flags & XS_CTL_DATA_IN) ? BUS_DMA_READ : 1214 BUS_DMA_WRITE)); 1215 } 1216 1217 switch (error) { 1218 case 0: 1219 break; 1220 1221 case ENOMEM: 1222 case EAGAIN: 1223 xs->error = XS_RESOURCE_SHORTAGE; 1224 goto out_bad; 1225 1226 default: 1227 xs->error = XS_DRIVER_STUFFUP; 1228 printf("%s: error %d loading DMA map\n", 1229 sc->sc_dev.dv_xname, error); 1230 out_bad: 1231 wds_free_scb(sc, scb); 1232 scsipi_done(xs); 1233 return; 1234 } 1235 1236 bus_dmamap_sync(dmat, scb->dmamap_xfer, 0, 1237 scb->dmamap_xfer->dm_mapsize, 1238 (flags & XS_CTL_DATA_IN) ? BUS_DMASYNC_PREREAD : 1239 BUS_DMASYNC_PREWRITE); 1240 1241 if (sc->sc_maxsegs > 1) { 1242 /* 1243 * Load the hardware scatter/gather map with the 1244 * contents of the DMA map. 1245 */ 1246 for (seg = 0; 1247 seg < scb->dmamap_xfer->dm_nsegs; seg++) { 1248 ltophys(scb->dmamap_xfer->dm_segs[seg].ds_addr, 1249 scb->scat_gath[seg].seg_addr); 1250 ltophys(scb->dmamap_xfer->dm_segs[seg].ds_len, 1251 scb->scat_gath[seg].seg_len); 1252 } 1253 1254 /* 1255 * Set up for scatter/gather transfer. 1256 */ 1257 scb->cmd.opcode = WDSX_SCSISG; 1258 ltophys(scb->dmamap_self->dm_segs[0].ds_addr + 1259 offsetof(struct wds_scb, scat_gath), 1260 scb->cmd.data); 1261 ltophys(scb->dmamap_self->dm_nsegs * 1262 sizeof(struct wds_scat_gath), scb->cmd.len); 1263 } else { 1264 /* 1265 * This board is an ASC or an ASE, and the 1266 * transfer has been mapped contig for us. 1267 */ 1268 scb->cmd.opcode = WDSX_SCSICMD; 1269 ltophys(scb->dmamap_xfer->dm_segs[0].ds_addr, 1270 scb->cmd.data); 1271 ltophys(scb->dmamap_xfer->dm_segs[0].ds_len, 1272 scb->cmd.len); 1273 } 1274 } else { 1275 scb->cmd.opcode = WDSX_SCSICMD; 1276 ltophys(0, scb->cmd.data); 1277 ltophys(0, scb->cmd.len); 1278 } 1279 1280 scb->cmd.stat = 0x00; 1281 scb->cmd.venderr = 0x00; 1282 ltophys(0, scb->cmd.link); 1283 1284 /* XXX Do we really want to do this? */ 1285 if (flags & XS_CTL_POLL) { 1286 /* Will poll card, await result. */ 1287 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 1288 WDS_HCR, WDSH_DRQEN); 1289 scb->flags |= SCB_POLLED; 1290 } else { 1291 /* 1292 * Will send command, let interrupt routine 1293 * handle result. 1294 */ 1295 bus_space_write_1(sc->sc_iot, sc->sc_ioh, WDS_HCR, 1296 WDSH_IRQEN | WDSH_DRQEN); 1297 } 1298 1299 s = splbio(); 1300 wds_queue_scb(sc, scb); 1301 splx(s); 1302 1303 if ((flags & XS_CTL_POLL) == 0) 1304 return; 1305 1306 if (wds_poll(sc, xs, scb->timeout)) { 1307 wds_timeout(scb); 1308 if (wds_poll(sc, xs, scb->timeout)) 1309 wds_timeout(scb); 1310 } 1311 return; 1312 1313 case ADAPTER_REQ_GROW_RESOURCES: 1314 /* XXX Not supported. */ 1315 return; 1316 1317 case ADAPTER_REQ_SET_XFER_MODE: 1318 /* XXX How do we do this? */ 1319 return; 1320 } 1321 } 1322 1323 /* 1324 * Poll a particular unit, looking for a particular scb 1325 */ 1326 int 1327 wds_poll(sc, xs, count) 1328 struct wds_softc *sc; 1329 struct scsipi_xfer *xs; 1330 int count; 1331 { 1332 bus_space_tag_t iot = sc->sc_iot; 1333 bus_space_handle_t ioh = sc->sc_ioh; 1334 1335 /* timeouts are in msec, so we loop in 1000 usec cycles */ 1336 while (count) { 1337 /* 1338 * If we had interrupts enabled, would we 1339 * have got an interrupt? 1340 */ 1341 if (bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_IRQ) 1342 wdsintr(sc); 1343 if (xs->xs_status & XS_STS_DONE) 1344 return 0; 1345 delay(1000); /* only happens in boot so ok */ 1346 count--; 1347 } 1348 return 1; 1349 } 1350 1351 /* 1352 * Poll a particular unit, looking for a particular scb 1353 */ 1354 int 1355 wds_ipoll(sc, scb, count) 1356 struct wds_softc *sc; 1357 struct wds_scb *scb; 1358 int count; 1359 { 1360 bus_space_tag_t iot = sc->sc_iot; 1361 bus_space_handle_t ioh = sc->sc_ioh; 1362 1363 /* timeouts are in msec, so we loop in 1000 usec cycles */ 1364 while (count) { 1365 /* 1366 * If we had interrupts enabled, would we 1367 * have got an interrupt? 1368 */ 1369 if (bus_space_read_1(iot, ioh, WDS_STAT) & WDSS_IRQ) 1370 wdsintr(sc); 1371 if (scb->flags & SCB_DONE) 1372 return 0; 1373 delay(1000); /* only happens in boot so ok */ 1374 count--; 1375 } 1376 return 1; 1377 } 1378 1379 void 1380 wds_timeout(arg) 1381 void *arg; 1382 { 1383 struct wds_scb *scb = arg; 1384 struct scsipi_xfer *xs = scb->xs; 1385 struct scsipi_periph *periph = xs->xs_periph; 1386 struct wds_softc *sc = 1387 (void *)periph->periph_channel->chan_adapter->adapt_dev; 1388 int s; 1389 1390 scsipi_printaddr(periph); 1391 printf("timed out"); 1392 1393 s = splbio(); 1394 1395 #ifdef WDSDIAG 1396 /* 1397 * If The scb's mbx is not free, then the board has gone south? 1398 */ 1399 wds_collect_mbo(sc); 1400 if (scb->flags & SCB_SENDING) { 1401 printf("%s: not taking commands!\n", sc->sc_dev.dv_xname); 1402 Debugger(); 1403 } 1404 #endif 1405 1406 /* 1407 * If it has been through before, then 1408 * a previous abort has failed, don't 1409 * try abort again 1410 */ 1411 if (scb->flags & SCB_ABORT) { 1412 /* abort timed out */ 1413 printf(" AGAIN\n"); 1414 /* XXX Must reset! */ 1415 } else { 1416 /* abort the operation that has timed out */ 1417 printf("\n"); 1418 scb->xs->error = XS_TIMEOUT; 1419 scb->timeout = WDS_ABORT_TIMEOUT; 1420 scb->flags |= SCB_ABORT; 1421 wds_queue_scb(sc, scb); 1422 } 1423 1424 splx(s); 1425 } 1426
Indexes created Tue Sep 23 07:09:52 GMT 2025