1 /* $NetBSD: xy.c,v 1.39 2002/01/14 13:32:48 tsutsui Exp $ */ 2 3 /* 4 * 5 * Copyright (c) 1995 Charles D. Cranor 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles D. Cranor. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * 36 * x y . c x y l o g i c s 4 5 0 / 4 5 1 s m d d r i v e r 37 * 38 * author: Chuck Cranor <chuck@ccrc.wustl.edu> 39 * started: 14-Sep-95 40 * references: [1] Xylogics Model 753 User's Manual 41 * part number: 166-753-001, Revision B, May 21, 1988. 42 * "Your Partner For Performance" 43 * [2] other NetBSD disk device drivers 44 * [3] Xylogics Model 450 User's Manual 45 * part number: 166-017-001, Revision B, 1983. 46 * [4] Addendum to Xylogics Model 450 Disk Controller User's 47 * Manual, Jan. 1985. 48 * [5] The 451 Controller, Rev. B3, September 2, 1986. 49 * [6] David Jones <dej@achilles.net>'s unfinished 450/451 driver 50 * 51 */ 52 53 #include <sys/cdefs.h> 54 __KERNEL_RCSID(0, "$NetBSD: xy.c,v 1.39 2002/01/14 13:32:48 tsutsui Exp $"); 55 56 #undef XYC_DEBUG /* full debug */ 57 #undef XYC_DIAG /* extra sanity checks */ 58 #if defined(DIAGNOSTIC) && !defined(XYC_DIAG) 59 #define XYC_DIAG /* link in with master DIAG option */ 60 #endif 61 62 #include <sys/param.h> 63 #include <sys/proc.h> 64 #include <sys/systm.h> 65 #include <sys/kernel.h> 66 #include <sys/file.h> 67 #include <sys/stat.h> 68 #include <sys/ioctl.h> 69 #include <sys/buf.h> 70 #include <sys/uio.h> 71 #include <sys/malloc.h> 72 #include <sys/device.h> 73 #include <sys/disklabel.h> 74 #include <sys/disk.h> 75 #include <sys/syslog.h> 76 #include <sys/dkbad.h> 77 #include <sys/conf.h> 78 79 #include <machine/bus.h> 80 #include <machine/intr.h> 81 82 #if defined(__sparc__) || defined(sun3) 83 #include <dev/sun/disklabel.h> 84 #endif 85 86 #include <dev/vme/vmereg.h> 87 #include <dev/vme/vmevar.h> 88 89 #include <dev/vme/xyreg.h> 90 #include <dev/vme/xyvar.h> 91 #include <dev/vme/xio.h> 92 93 #include "locators.h" 94 95 /* 96 * macros 97 */ 98 99 /* 100 * XYC_GO: start iopb ADDR (DVMA addr in a u_long) on XYC 101 */ 102 #define XYC_GO(XYC, ADDR) { \ 103 (XYC)->xyc_addr_lo = ((ADDR) & 0xff); \ 104 (ADDR) = ((ADDR) >> 8); \ 105 (XYC)->xyc_addr_hi = ((ADDR) & 0xff); \ 106 (ADDR) = ((ADDR) >> 8); \ 107 (XYC)->xyc_reloc_lo = ((ADDR) & 0xff); \ 108 (ADDR) = ((ADDR) >> 8); \ 109 (XYC)->xyc_reloc_hi = (ADDR); \ 110 (XYC)->xyc_csr = XYC_GBSY; /* go! */ \ 111 } 112 113 /* 114 * XYC_DONE: don't need IORQ, get error code and free (done after xyc_cmd) 115 */ 116 117 #define XYC_DONE(SC,ER) { \ 118 if ((ER) == XY_ERR_AOK) { \ 119 (ER) = (SC)->ciorq->errno; \ 120 (SC)->ciorq->mode = XY_SUB_FREE; \ 121 wakeup((SC)->ciorq); \ 122 } \ 123 } 124 125 /* 126 * XYC_ADVANCE: advance iorq's pointers by a number of sectors 127 */ 128 129 #define XYC_ADVANCE(IORQ, N) { \ 130 if (N) { \ 131 (IORQ)->sectcnt -= (N); \ 132 (IORQ)->blockno += (N); \ 133 (IORQ)->dbuf += ((N)*XYFM_BPS); \ 134 } \ 135 } 136 137 /* 138 * note - addresses you can sleep on: 139 * [1] & of xy_softc's "state" (waiting for a chance to attach a drive) 140 * [2] & an iorq (waiting for an XY_SUB_WAIT iorq to finish) 141 */ 142 143 144 /* 145 * function prototypes 146 * "xyc_*" functions are internal, all others are external interfaces 147 */ 148 149 extern int pil_to_vme[]; /* from obio.c */ 150 151 /* internals */ 152 struct xy_iopb *xyc_chain __P((struct xyc_softc *, struct xy_iorq *)); 153 int xyc_cmd __P((struct xyc_softc *, int, int, int, int, int, char *, int)); 154 char *xyc_e2str __P((int)); 155 int xyc_entoact __P((int)); 156 int xyc_error __P((struct xyc_softc *, struct xy_iorq *, 157 struct xy_iopb *, int)); 158 int xyc_ioctlcmd __P((struct xy_softc *, dev_t dev, struct xd_iocmd *)); 159 void xyc_perror __P((struct xy_iorq *, struct xy_iopb *, int)); 160 int xyc_piodriver __P((struct xyc_softc *, struct xy_iorq *)); 161 int xyc_remove_iorq __P((struct xyc_softc *)); 162 int xyc_reset __P((struct xyc_softc *, int, struct xy_iorq *, int, 163 struct xy_softc *)); 164 inline void xyc_rqinit __P((struct xy_iorq *, struct xyc_softc *, 165 struct xy_softc *, int, u_long, int, 166 caddr_t, struct buf *)); 167 void xyc_rqtopb __P((struct xy_iorq *, struct xy_iopb *, int, int)); 168 void xyc_start __P((struct xyc_softc *, struct xy_iorq *)); 169 int xyc_startbuf __P((struct xyc_softc *, struct xy_softc *, struct buf *)); 170 int xyc_submit_iorq __P((struct xyc_softc *, struct xy_iorq *, int)); 171 void xyc_tick __P((void *)); 172 int xyc_unbusy __P((struct xyc *, int)); 173 void xyc_xyreset __P((struct xyc_softc *, struct xy_softc *)); 174 int xy_dmamem_alloc(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 175 int *, bus_size_t, caddr_t *, bus_addr_t *); 176 void xy_dmamem_free(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 177 int, bus_size_t, caddr_t); 178 179 /* machine interrupt hook */ 180 int xycintr __P((void *)); 181 182 /* autoconf */ 183 int xycmatch __P((struct device *, struct cfdata *, void *)); 184 void xycattach __P((struct device *, struct device *, void *)); 185 int xymatch __P((struct device *, struct cfdata *, void *)); 186 void xyattach __P((struct device *, struct device *, void *)); 187 static int xyc_probe __P((void *, bus_space_tag_t, bus_space_handle_t)); 188 189 static void xydummystrat __P((struct buf *)); 190 int xygetdisklabel __P((struct xy_softc *, void *)); 191 192 bdev_decl(xy); 193 cdev_decl(xy); 194 195 /* 196 * cfattach's: device driver interface to autoconfig 197 */ 198 199 struct cfattach xyc_ca = { 200 sizeof(struct xyc_softc), xycmatch, xycattach 201 }; 202 203 struct cfattach xy_ca = { 204 sizeof(struct xy_softc), xymatch, xyattach 205 }; 206 207 extern struct cfdriver xy_cd; 208 209 struct xyc_attach_args { /* this is the "aux" args to xyattach */ 210 int driveno; /* unit number */ 211 int fullmode; /* submit mode */ 212 int booting; /* are we booting or not? */ 213 }; 214 215 /* 216 * dkdriver 217 */ 218 219 struct dkdriver xydkdriver = { xystrategy }; 220 221 /* 222 * start: disk label fix code (XXX) 223 */ 224 225 static void *xy_labeldata; 226 227 static void 228 xydummystrat(bp) 229 struct buf *bp; 230 { 231 if (bp->b_bcount != XYFM_BPS) 232 panic("xydummystrat"); 233 bcopy(xy_labeldata, bp->b_data, XYFM_BPS); 234 bp->b_flags |= B_DONE; 235 bp->b_flags &= ~B_BUSY; 236 } 237 238 int 239 xygetdisklabel(xy, b) 240 struct xy_softc *xy; 241 void *b; 242 { 243 char *err; 244 #if defined(__sparc__) || defined(sun3) 245 struct sun_disklabel *sdl; 246 #endif 247 248 /* We already have the label data in `b'; setup for dummy strategy */ 249 xy_labeldata = b; 250 251 /* Required parameter for readdisklabel() */ 252 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; 253 254 err = readdisklabel(MAKEDISKDEV(0, xy->sc_dev.dv_unit, RAW_PART), 255 xydummystrat, 256 xy->sc_dk.dk_label, xy->sc_dk.dk_cpulabel); 257 if (err) { 258 printf("%s: %s\n", xy->sc_dev.dv_xname, err); 259 return(XY_ERR_FAIL); 260 } 261 262 #if defined(__sparc__) || defined(sun3) 263 /* Ok, we have the label; fill in `pcyl' if there's SunOS magic */ 264 sdl = (struct sun_disklabel *)xy->sc_dk.dk_cpulabel->cd_block; 265 if (sdl->sl_magic == SUN_DKMAGIC) { 266 xy->pcyl = sdl->sl_pcylinders; 267 } else 268 #endif 269 { 270 printf("%s: WARNING: no `pcyl' in disk label.\n", 271 xy->sc_dev.dv_xname); 272 xy->pcyl = xy->sc_dk.dk_label->d_ncylinders + 273 xy->sc_dk.dk_label->d_acylinders; 274 printf("%s: WARNING: guessing pcyl=%d (ncyl+acyl)\n", 275 xy->sc_dev.dv_xname, xy->pcyl); 276 } 277 278 xy->ncyl = xy->sc_dk.dk_label->d_ncylinders; 279 xy->acyl = xy->sc_dk.dk_label->d_acylinders; 280 xy->nhead = xy->sc_dk.dk_label->d_ntracks; 281 xy->nsect = xy->sc_dk.dk_label->d_nsectors; 282 xy->sectpercyl = xy->nhead * xy->nsect; 283 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; /* not handled by 284 * sun->bsd */ 285 return(XY_ERR_AOK); 286 } 287 288 /* 289 * end: disk label fix code (XXX) 290 */ 291 292 /* 293 * Shorthand for allocating, mapping and loading a DMA buffer 294 */ 295 int 296 xy_dmamem_alloc(tag, map, seg, nsegp, len, kvap, dmap) 297 bus_dma_tag_t tag; 298 bus_dmamap_t map; 299 bus_dma_segment_t *seg; 300 int *nsegp; 301 bus_size_t len; 302 caddr_t *kvap; 303 bus_addr_t *dmap; 304 { 305 int nseg; 306 int error; 307 308 if ((error = bus_dmamem_alloc(tag, len, 0, 0, 309 seg, 1, &nseg, BUS_DMA_NOWAIT)) != 0) { 310 return (error); 311 } 312 313 if ((error = bus_dmamem_map(tag, seg, nseg, 314 len, kvap, 315 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 316 bus_dmamem_free(tag, seg, nseg); 317 return (error); 318 } 319 320 if ((error = bus_dmamap_load(tag, map, *kvap, len, NULL, 321 BUS_DMA_NOWAIT)) != 0) { 322 bus_dmamem_unmap(tag, *kvap, len); 323 bus_dmamem_free(tag, seg, nseg); 324 return (error); 325 } 326 327 *dmap = map->dm_segs[0].ds_addr; 328 *nsegp = nseg; 329 return (0); 330 } 331 332 void 333 xy_dmamem_free(tag, map, seg, nseg, len, kva) 334 bus_dma_tag_t tag; 335 bus_dmamap_t map; 336 bus_dma_segment_t *seg; 337 int nseg; 338 bus_size_t len; 339 caddr_t kva; 340 { 341 342 bus_dmamap_unload(tag, map); 343 bus_dmamem_unmap(tag, kva, len); 344 bus_dmamem_free(tag, seg, nseg); 345 } 346 347 348 /* 349 * a u t o c o n f i g f u n c t i o n s 350 */ 351 352 /* 353 * xycmatch: determine if xyc is present or not. we do a 354 * soft reset to detect the xyc. 355 */ 356 int 357 xyc_probe(arg, tag, handle) 358 void *arg; 359 bus_space_tag_t tag; 360 bus_space_handle_t handle; 361 { 362 struct xyc *xyc = (void *)handle; /* XXX */ 363 364 return ((xyc_unbusy(xyc, XYC_RESETUSEC) != XY_ERR_FAIL) ? 0 : EIO); 365 } 366 367 int xycmatch(parent, cf, aux) 368 struct device *parent; 369 struct cfdata *cf; 370 void *aux; 371 { 372 struct vme_attach_args *va = aux; 373 vme_chipset_tag_t ct = va->va_vct; 374 vme_am_t mod; 375 int error; 376 377 mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 378 if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod)) 379 return (0); 380 381 error = vme_probe(ct, va->r[0].offset, sizeof(struct xyc), 382 mod, VME_D16, xyc_probe, 0); 383 vme_space_free(va->va_vct, va->r[0].offset, sizeof(struct xyc), mod); 384 385 return (error == 0); 386 } 387 388 /* 389 * xycattach: attach controller 390 */ 391 void 392 xycattach(parent, self, aux) 393 struct device *parent, *self; 394 void *aux; 395 396 { 397 struct xyc_softc *xyc = (void *) self; 398 struct vme_attach_args *va = aux; 399 vme_chipset_tag_t ct = va->va_vct; 400 bus_space_tag_t bt; 401 bus_space_handle_t bh; 402 vme_intr_handle_t ih; 403 vme_am_t mod; 404 struct xyc_attach_args xa; 405 int lcv, res, error; 406 bus_dma_segment_t seg; 407 int rseg; 408 vme_mapresc_t resc; 409 410 /* get addressing and intr level stuff from autoconfig and load it 411 * into our xyc_softc. */ 412 413 mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 414 415 if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod)) 416 panic("xyc: vme alloc"); 417 418 if (vme_space_map(ct, va->r[0].offset, sizeof(struct xyc), 419 mod, VME_D16, 0, &bt, &bh, &resc) != 0) 420 panic("xyc: vme_map"); 421 422 xyc->xyc = (struct xyc *) bh; /* XXX */ 423 xyc->ipl = va->ilevel; 424 xyc->vector = va->ivector; 425 xyc->no_ols = 0; /* XXX should be from config */ 426 427 for (lcv = 0; lcv < XYC_MAXDEV; lcv++) 428 xyc->sc_drives[lcv] = (struct xy_softc *) 0; 429 430 /* 431 * allocate and zero buffers 432 * check boundaries of the KVA's ... all IOPBs must reside in 433 * the same 64K region. 434 */ 435 436 /* Get DMA handle for misc. transfers */ 437 if ((error = vme_dmamap_create( 438 ct, /* VME chip tag */ 439 MAXPHYS, /* size */ 440 VME_AM_A24, /* address modifier */ 441 VME_D16, /* data size */ 442 0, /* swap */ 443 1, /* nsegments */ 444 MAXPHYS, /* maxsegsz */ 445 0, /* boundary */ 446 BUS_DMA_NOWAIT, 447 &xyc->reqs[lcv].dmamap)) != 0) { 448 449 printf("%s: DMA buffer map create error %d\n", 450 xyc->sc_dev.dv_xname, error); 451 return; 452 } 453 454 /* Get DMA handle for mapping iorq descriptors */ 455 if ((error = vme_dmamap_create( 456 ct, /* VME chip tag */ 457 XYC_MAXIOPB * sizeof(struct xy_iopb), 458 VME_AM_A24, /* address modifier */ 459 VME_D16, /* data size */ 460 0, /* swap */ 461 1, /* nsegments */ 462 XYC_MAXIOPB * sizeof(struct xy_iopb), 463 64*1024, /* boundary */ 464 BUS_DMA_NOWAIT, 465 &xyc->iopmap)) != 0) { 466 467 printf("%s: DMA buffer map create error %d\n", 468 xyc->sc_dev.dv_xname, error); 469 return; 470 } 471 472 /* Get DMA buffer for iorq descriptors */ 473 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->iopmap, &seg, &rseg, 474 XYC_MAXIOPB * sizeof(struct xy_iopb), 475 (caddr_t *)&xyc->iopbase, 476 (bus_addr_t *)&xyc->dvmaiopb)) != 0) { 477 printf("%s: DMA buffer alloc error %d\n", 478 xyc->sc_dev.dv_xname, error); 479 return; 480 } 481 482 bzero(xyc->iopbase, XYC_MAXIOPB * sizeof(struct xy_iopb)); 483 484 xyc->reqs = (struct xy_iorq *) 485 malloc(XYC_MAXIOPB * sizeof(struct xy_iorq), 486 M_DEVBUF, M_NOWAIT|M_ZERO); 487 if (xyc->reqs == NULL) 488 panic("xyc malloc"); 489 490 /* 491 * init iorq to iopb pointers, and non-zero fields in the 492 * iopb which never change. 493 */ 494 495 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 496 xyc->xy_chain[lcv] = NULL; 497 xyc->reqs[lcv].iopb = &xyc->iopbase[lcv]; 498 xyc->reqs[lcv].dmaiopb = &xyc->dvmaiopb[lcv]; 499 xyc->iopbase[lcv].asr = 1; /* always the same */ 500 xyc->iopbase[lcv].eef = 1; /* always the same */ 501 xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */ 502 xyc->iopbase[lcv].aud = 1; /* always the same */ 503 xyc->iopbase[lcv].relo = 1; /* always the same */ 504 xyc->iopbase[lcv].thro = XY_THRO;/* always the same */ 505 506 if ((error = vme_dmamap_create( 507 ct, /* VME chip tag */ 508 MAXPHYS, /* size */ 509 VME_AM_A24, /* address modifier */ 510 VME_D16, /* data size */ 511 0, /* swap */ 512 1, /* nsegments */ 513 MAXPHYS, /* maxsegsz */ 514 0, /* boundary */ 515 BUS_DMA_NOWAIT, 516 &xyc->reqs[lcv].dmamap)) != 0) { 517 518 printf("%s: DMA buffer map create error %d\n", 519 xyc->sc_dev.dv_xname, error); 520 return; 521 } 522 } 523 xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */ 524 xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */ 525 xyc->xy_hand = 0; 526 527 /* read controller parameters and insure we have a 450/451 */ 528 529 error = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL); 530 res = xyc->ciopb->ctyp; 531 XYC_DONE(xyc, error); 532 if (res != XYCT_450) { 533 if (error) 534 printf(": %s: ", xyc_e2str(error)); 535 printf(": doesn't identify as a 450/451\n"); 536 return; 537 } 538 printf(": Xylogics 450/451"); 539 if (xyc->no_ols) 540 printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */ 541 printf("\n"); 542 if (error) { 543 printf("%s: error: %s\n", xyc->sc_dev.dv_xname, 544 xyc_e2str(error)); 545 return; 546 } 547 if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) { 548 printf("%s: 24 bit addressing turned off\n", 549 xyc->sc_dev.dv_xname); 550 printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n"); 551 printf("to enable 24 bit mode and this driver\n"); 552 return; 553 } 554 555 /* link in interrupt with higher level software */ 556 vme_intr_map(ct, va->ilevel, va->ivector, &ih); 557 vme_intr_establish(ct, ih, IPL_BIO, xycintr, xyc); 558 evcnt_attach_dynamic(&xyc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 559 xyc->sc_dev.dv_xname, "intr"); 560 561 callout_init(&xyc->sc_tick_ch); 562 563 /* now we must look for disks using autoconfig */ 564 xa.fullmode = XY_SUB_POLL; 565 xa.booting = 1; 566 567 for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++) 568 (void) config_found(self, (void *) &xa, NULL); 569 570 /* start the watchdog clock */ 571 callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc); 572 573 } 574 575 /* 576 * xymatch: probe for disk. 577 * 578 * note: we almost always say disk is present. this allows us to 579 * spin up and configure a disk after the system is booted (we can 580 * call xyattach!). 581 */ 582 int 583 xymatch(parent, cf, aux) 584 struct device *parent; 585 struct cfdata *cf; 586 void *aux; 587 { 588 struct xyc_attach_args *xa = aux; 589 590 /* looking for autoconf wildcard or exact match */ 591 592 if (cf->cf_loc[XYCCF_DRIVE] != XYCCF_DRIVE_DEFAULT && 593 cf->cf_loc[XYCCF_DRIVE] != xa->driveno) 594 return 0; 595 596 return 1; 597 598 } 599 600 /* 601 * xyattach: attach a disk. this can be called from autoconf and also 602 * from xyopen/xystrategy. 603 */ 604 void 605 xyattach(parent, self, aux) 606 struct device *parent, *self; 607 void *aux; 608 609 { 610 struct xy_softc *xy = (void *) self, *oxy; 611 struct xyc_softc *xyc = (void *) parent; 612 struct xyc_attach_args *xa = aux; 613 int spt, mb, blk, lcv, fmode, s = 0, newstate; 614 struct dkbad *dkb; 615 int rseg, error; 616 bus_dma_segment_t seg; 617 caddr_t dmaddr; 618 caddr_t buf; 619 620 /* 621 * Always re-initialize the disk structure. We want statistics 622 * to start with a clean slate. 623 */ 624 bzero(&xy->sc_dk, sizeof(xy->sc_dk)); 625 xy->sc_dk.dk_driver = &xydkdriver; 626 xy->sc_dk.dk_name = xy->sc_dev.dv_xname; 627 628 /* if booting, init the xy_softc */ 629 630 if (xa->booting) { 631 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 632 xy->flags = 0; 633 xy->parent = xyc; 634 635 /* init queue of waiting bufs */ 636 637 BUFQ_INIT(&xy->xyq); 638 639 xy->xyrq = &xyc->reqs[xa->driveno]; 640 641 } 642 xy->xy_drive = xa->driveno; 643 fmode = xa->fullmode; 644 xyc->sc_drives[xa->driveno] = xy; 645 646 /* if not booting, make sure we are the only process in the attach for 647 * this drive. if locked out, sleep on it. */ 648 649 if (!xa->booting) { 650 s = splbio(); 651 while (xy->state == XY_DRIVE_ATTACHING) { 652 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 653 splx(s); 654 return; 655 } 656 } 657 printf("%s at %s", 658 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 659 } 660 661 /* we now have control */ 662 xy->state = XY_DRIVE_ATTACHING; 663 newstate = XY_DRIVE_UNKNOWN; 664 665 buf = NULL; 666 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->auxmap, &seg, &rseg, 667 XYFM_BPS, 668 (caddr_t *)&buf, 669 (bus_addr_t *)&dmaddr)) != 0) { 670 printf("%s: DMA buffer alloc error %d\n", 671 xyc->sc_dev.dv_xname, error); 672 return; 673 } 674 675 /* first try and reset the drive */ 676 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 677 XYC_DONE(xyc, error); 678 if (error == XY_ERR_DNRY) { 679 printf(" drive %d: off-line\n", xa->driveno); 680 goto done; 681 } 682 if (error) { 683 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 684 goto done; 685 } 686 printf(" drive %d: ready", xa->driveno); 687 688 /* 689 * now set drive parameters (to semi-bogus values) so we can read the 690 * disk label. 691 */ 692 xy->pcyl = xy->ncyl = 1; 693 xy->acyl = 0; 694 xy->nhead = 1; 695 xy->nsect = 1; 696 xy->sectpercyl = 1; 697 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 698 xy->dkb.bt_bad[lcv].bt_cyl = 699 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 700 701 /* read disk label */ 702 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 703 xy->drive_type++) { 704 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 705 dmaddr, fmode); 706 XYC_DONE(xyc, error); 707 if (error == XY_ERR_AOK) break; 708 } 709 710 if (error != XY_ERR_AOK) { 711 printf("\n%s: reading disk label failed: %s\n", 712 xy->sc_dev.dv_xname, xyc_e2str(error)); 713 goto done; 714 } 715 printf(" (drive type %d)\n", xy->drive_type); 716 717 newstate = XY_DRIVE_NOLABEL; 718 719 xy->hw_spt = spt = 0; /* XXX needed ? */ 720 /* Attach the disk: must be before getdisklabel to malloc label */ 721 disk_attach(&xy->sc_dk); 722 723 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 724 goto done; 725 726 /* inform the user of what is up */ 727 printf("%s: <%s>, pcyl %d\n", xy->sc_dev.dv_xname, 728 buf, xy->pcyl); 729 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 730 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 731 xy->sc_dev.dv_xname, mb, xy->ncyl, xy->nhead, xy->nsect, 732 XYFM_BPS); 733 734 /* 735 * 450/451 stupidity: the drive type is encoded into the format 736 * of the disk. the drive type in the IOPB must match the drive 737 * type in the format, or you will not be able to do I/O to the 738 * disk (you get header not found errors). if you have two drives 739 * of different sizes that have the same drive type in their 740 * formatting then you are out of luck. 741 * 742 * this problem was corrected in the 753/7053. 743 */ 744 745 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 746 oxy = xyc->sc_drives[lcv]; 747 if (oxy == NULL || oxy == xy) continue; 748 if (oxy->drive_type != xy->drive_type) continue; 749 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 750 xy->nhead != oxy->nhead) { 751 printf("%s: %s and %s must be the same size!\n", 752 xyc->sc_dev.dv_xname, xy->sc_dev.dv_xname, 753 oxy->sc_dev.dv_xname); 754 panic("xy drive size mismatch"); 755 } 756 } 757 758 759 /* now set the real drive parameters! */ 760 761 blk = (xy->nsect - 1) + 762 ((xy->nhead - 1) * xy->nsect) + 763 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 764 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 765 XYC_DONE(xyc, error); 766 if (error) { 767 printf("%s: write drive size failed: %s\n", 768 xy->sc_dev.dv_xname, xyc_e2str(error)); 769 goto done; 770 } 771 newstate = XY_DRIVE_ONLINE; 772 773 /* 774 * read bad144 table. this table resides on the first sector of the 775 * last track of the disk (i.e. second cyl of "acyl" area). 776 */ 777 778 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 779 /* last cyl */ 780 (xy->nhead - 1) * xy->nsect; /* last head */ 781 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 782 dmaddr, fmode); 783 XYC_DONE(xyc, error); 784 if (error) { 785 printf("%s: reading bad144 failed: %s\n", 786 xy->sc_dev.dv_xname, xyc_e2str(error)); 787 goto done; 788 } 789 790 /* check dkbad for sanity */ 791 dkb = (struct dkbad *) buf; 792 for (lcv = 0; lcv < 126; lcv++) { 793 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 794 dkb->bt_bad[lcv].bt_cyl == 0) && 795 dkb->bt_bad[lcv].bt_trksec == 0xffff) 796 continue; /* blank */ 797 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 798 break; 799 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 800 break; 801 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 802 break; 803 } 804 if (lcv != 126) { 805 printf("%s: warning: invalid bad144 sector!\n", 806 xy->sc_dev.dv_xname); 807 } else { 808 bcopy(buf, &xy->dkb, XYFM_BPS); 809 } 810 811 done: 812 if (buf != NULL) { 813 xy_dmamem_free(xyc->dmatag, xyc->auxmap, 814 &seg, rseg, XYFM_BPS, buf); 815 } 816 817 xy->state = newstate; 818 if (!xa->booting) { 819 wakeup(&xy->state); 820 splx(s); 821 } 822 } 823 824 /* 825 * end of autoconfig functions 826 */ 827 828 /* 829 * { b , c } d e v s w f u n c t i o n s 830 */ 831 832 /* 833 * xyclose: close device 834 */ 835 int 836 xyclose(dev, flag, fmt, p) 837 dev_t dev; 838 int flag, fmt; 839 struct proc *p; 840 841 { 842 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 843 int part = DISKPART(dev); 844 845 /* clear mask bits */ 846 847 switch (fmt) { 848 case S_IFCHR: 849 xy->sc_dk.dk_copenmask &= ~(1 << part); 850 break; 851 case S_IFBLK: 852 xy->sc_dk.dk_bopenmask &= ~(1 << part); 853 break; 854 } 855 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 856 857 return 0; 858 } 859 860 /* 861 * xydump: crash dump system 862 */ 863 int 864 xydump(dev, blkno, va, size) 865 dev_t dev; 866 daddr_t blkno; 867 caddr_t va; 868 size_t size; 869 { 870 int unit, part; 871 struct xy_softc *xy; 872 873 unit = DISKUNIT(dev); 874 if (unit >= xy_cd.cd_ndevs) 875 return ENXIO; 876 part = DISKPART(dev); 877 878 xy = xy_cd.cd_devs[unit]; 879 880 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 881 'a' + part); 882 883 return ENXIO; 884 885 /* outline: globals: "dumplo" == sector number of partition to start 886 * dump at (convert to physical sector with partition table) 887 * "dumpsize" == size of dump in clicks "physmem" == size of physical 888 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 889 * physmem) 890 * 891 * dump a copy of physical memory to the dump device starting at sector 892 * "dumplo" in the swap partition (make sure > 0). map in pages as 893 * we go. use polled I/O. 894 * 895 * XXX how to handle NON_CONTIG? */ 896 897 } 898 899 /* 900 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 901 */ 902 int 903 xyioctl(dev, command, addr, flag, p) 904 dev_t dev; 905 u_long command; 906 caddr_t addr; 907 int flag; 908 struct proc *p; 909 910 { 911 struct xy_softc *xy; 912 struct xd_iocmd *xio; 913 int error, s, unit; 914 #ifdef __HAVE_OLD_DISKLABEL 915 struct disklabel newlabel; 916 #endif 917 struct disklabel *lp; 918 919 unit = DISKUNIT(dev); 920 921 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 922 return (ENXIO); 923 924 /* switch on ioctl type */ 925 926 switch (command) { 927 case DIOCSBAD: /* set bad144 info */ 928 if ((flag & FWRITE) == 0) 929 return EBADF; 930 s = splbio(); 931 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 932 splx(s); 933 return 0; 934 935 case DIOCGDINFO: /* get disk label */ 936 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 937 return 0; 938 #ifdef __HAVE_OLD_DISKLABEL 939 case ODIOCGDINFO: 940 newlabel = *(xy->sc_dk.dk_label); 941 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 942 return ENOTTY; 943 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 944 return 0; 945 #endif 946 947 case DIOCGPART: /* get partition info */ 948 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 949 ((struct partinfo *) addr)->part = 950 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 951 return 0; 952 953 case DIOCSDINFO: /* set disk label */ 954 #ifdef __HAVE_OLD_DISKLABEL 955 case ODIOCSDINFO: 956 if (command == ODIOCSDINFO) { 957 memset(&newlabel, 0, sizeof newlabel); 958 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 959 lp = &newlabel; 960 } else 961 #endif 962 lp = (struct disklabel *)addr; 963 964 if ((flag & FWRITE) == 0) 965 return EBADF; 966 error = setdisklabel(xy->sc_dk.dk_label, 967 lp, /* xy->sc_dk.dk_openmask : */ 0, 968 xy->sc_dk.dk_cpulabel); 969 if (error == 0) { 970 if (xy->state == XY_DRIVE_NOLABEL) 971 xy->state = XY_DRIVE_ONLINE; 972 } 973 return error; 974 975 case DIOCWLABEL: /* change write status of disk label */ 976 if ((flag & FWRITE) == 0) 977 return EBADF; 978 if (*(int *) addr) 979 xy->flags |= XY_WLABEL; 980 else 981 xy->flags &= ~XY_WLABEL; 982 return 0; 983 984 case DIOCWDINFO: /* write disk label */ 985 #ifdef __HAVE_OLD_DISKLABEL 986 case ODIOCWDINFO: 987 if (command == ODIOCWDINFO) { 988 memset(&newlabel, 0, sizeof newlabel); 989 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 990 lp = &newlabel; 991 } else 992 #endif 993 lp = (struct disklabel *)addr; 994 995 if ((flag & FWRITE) == 0) 996 return EBADF; 997 error = setdisklabel(xy->sc_dk.dk_label, 998 lp, /* xy->sc_dk.dk_openmask : */ 0, 999 xy->sc_dk.dk_cpulabel); 1000 if (error == 0) { 1001 if (xy->state == XY_DRIVE_NOLABEL) 1002 xy->state = XY_DRIVE_ONLINE; 1003 1004 /* Simulate opening partition 0 so write succeeds. */ 1005 xy->sc_dk.dk_openmask |= (1 << 0); 1006 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 1007 xystrategy, xy->sc_dk.dk_label, 1008 xy->sc_dk.dk_cpulabel); 1009 xy->sc_dk.dk_openmask = 1010 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1011 } 1012 return error; 1013 1014 case DIOSXDCMD: 1015 xio = (struct xd_iocmd *) addr; 1016 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1017 return (error); 1018 return (xyc_ioctlcmd(xy, dev, xio)); 1019 1020 default: 1021 return ENOTTY; 1022 } 1023 } 1024 1025 /* 1026 * xyopen: open drive 1027 */ 1028 1029 int 1030 xyopen(dev, flag, fmt, p) 1031 dev_t dev; 1032 int flag, fmt; 1033 struct proc *p; 1034 { 1035 int unit, part; 1036 struct xy_softc *xy; 1037 struct xyc_attach_args xa; 1038 1039 /* first, could it be a valid target? */ 1040 1041 unit = DISKUNIT(dev); 1042 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 1043 return (ENXIO); 1044 part = DISKPART(dev); 1045 1046 /* do we need to attach the drive? */ 1047 1048 if (xy->state == XY_DRIVE_UNKNOWN) { 1049 xa.driveno = xy->xy_drive; 1050 xa.fullmode = XY_SUB_WAIT; 1051 xa.booting = 0; 1052 xyattach((struct device *) xy->parent, 1053 (struct device *) xy, &xa); 1054 if (xy->state == XY_DRIVE_UNKNOWN) { 1055 return (EIO); 1056 } 1057 } 1058 /* check for partition */ 1059 1060 if (part != RAW_PART && 1061 (part >= xy->sc_dk.dk_label->d_npartitions || 1062 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1063 return (ENXIO); 1064 } 1065 /* set open masks */ 1066 1067 switch (fmt) { 1068 case S_IFCHR: 1069 xy->sc_dk.dk_copenmask |= (1 << part); 1070 break; 1071 case S_IFBLK: 1072 xy->sc_dk.dk_bopenmask |= (1 << part); 1073 break; 1074 } 1075 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1076 1077 return 0; 1078 } 1079 1080 int 1081 xyread(dev, uio, flags) 1082 dev_t dev; 1083 struct uio *uio; 1084 int flags; 1085 { 1086 1087 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1088 } 1089 1090 int 1091 xywrite(dev, uio, flags) 1092 dev_t dev; 1093 struct uio *uio; 1094 int flags; 1095 { 1096 1097 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1098 } 1099 1100 1101 /* 1102 * xysize: return size of a partition for a dump 1103 */ 1104 1105 int 1106 xysize(dev) 1107 dev_t dev; 1108 1109 { 1110 struct xy_softc *xysc; 1111 int unit, part, size, omask; 1112 1113 /* valid unit? */ 1114 unit = DISKUNIT(dev); 1115 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1116 return (-1); 1117 1118 part = DISKPART(dev); 1119 omask = xysc->sc_dk.dk_openmask & (1 << part); 1120 1121 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1122 return (-1); 1123 1124 /* do it */ 1125 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1126 size = -1; /* only give valid size for swap partitions */ 1127 else 1128 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1129 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1130 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1131 return (-1); 1132 return (size); 1133 } 1134 1135 /* 1136 * xystrategy: buffering system interface to xy. 1137 */ 1138 1139 void 1140 xystrategy(bp) 1141 struct buf *bp; 1142 1143 { 1144 struct xy_softc *xy; 1145 int s, unit; 1146 struct xyc_attach_args xa; 1147 struct disklabel *lp; 1148 daddr_t blkno; 1149 1150 unit = DISKUNIT(bp->b_dev); 1151 1152 /* check for live device */ 1153 1154 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1155 bp->b_blkno < 0 || 1156 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1157 bp->b_error = EINVAL; 1158 goto bad; 1159 } 1160 /* do we need to attach the drive? */ 1161 1162 if (xy->state == XY_DRIVE_UNKNOWN) { 1163 xa.driveno = xy->xy_drive; 1164 xa.fullmode = XY_SUB_WAIT; 1165 xa.booting = 0; 1166 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1167 if (xy->state == XY_DRIVE_UNKNOWN) { 1168 bp->b_error = EIO; 1169 goto bad; 1170 } 1171 } 1172 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1173 /* no I/O to unlabeled disks, unless raw partition */ 1174 bp->b_error = EIO; 1175 goto bad; 1176 } 1177 /* short circuit zero length request */ 1178 1179 if (bp->b_bcount == 0) 1180 goto done; 1181 1182 /* check bounds with label (disksubr.c). Determine the size of the 1183 * transfer, and make sure it is within the boundaries of the 1184 * partition. Adjust transfer if needed, and signal errors or early 1185 * completion. */ 1186 1187 lp = xy->sc_dk.dk_label; 1188 1189 if (bounds_check_with_label(bp, lp, 1190 (xy->flags & XY_WLABEL) != 0) <= 0) 1191 goto done; 1192 1193 /* 1194 * Now convert the block number to absolute and put it in 1195 * terms of the device's logical block size. 1196 */ 1197 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1198 if (DISKPART(bp->b_dev) != RAW_PART) 1199 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1200 1201 bp->b_rawblkno = blkno; 1202 1203 /* 1204 * now we know we have a valid buf structure that we need to do I/O 1205 * on. 1206 */ 1207 s = splbio(); /* protect the queues */ 1208 1209 disksort_blkno(&xy->xyq, bp); 1210 1211 /* start 'em up */ 1212 1213 xyc_start(xy->parent, NULL); 1214 1215 /* done! */ 1216 1217 splx(s); 1218 return; 1219 1220 bad: /* tells upper layers we have an error */ 1221 bp->b_flags |= B_ERROR; 1222 done: /* tells upper layers we are done with this 1223 * buf */ 1224 bp->b_resid = bp->b_bcount; 1225 biodone(bp); 1226 } 1227 /* 1228 * end of {b,c}devsw functions 1229 */ 1230 1231 /* 1232 * i n t e r r u p t f u n c t i o n 1233 * 1234 * xycintr: hardware interrupt. 1235 */ 1236 int 1237 xycintr(v) 1238 void *v; 1239 1240 { 1241 struct xyc_softc *xycsc = v; 1242 1243 /* kick the event counter */ 1244 1245 xycsc->sc_intrcnt.ev_count++; 1246 1247 /* remove as many done IOPBs as possible */ 1248 1249 xyc_remove_iorq(xycsc); 1250 1251 /* start any iorq's already waiting */ 1252 1253 xyc_start(xycsc, NULL); 1254 1255 return (1); 1256 } 1257 /* 1258 * end of interrupt function 1259 */ 1260 1261 /* 1262 * i n t e r n a l f u n c t i o n s 1263 */ 1264 1265 /* 1266 * xyc_rqinit: fill out the fields of an I/O request 1267 */ 1268 1269 inline void 1270 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1271 struct xy_iorq *rq; 1272 struct xyc_softc *xyc; 1273 struct xy_softc *xy; 1274 int md; 1275 u_long blk; 1276 int cnt; 1277 caddr_t db; 1278 struct buf *bp; 1279 { 1280 rq->xyc = xyc; 1281 rq->xy = xy; 1282 rq->ttl = XYC_MAXTTL + 10; 1283 rq->mode = md; 1284 rq->tries = rq->errno = rq->lasterror = 0; 1285 rq->blockno = blk; 1286 rq->sectcnt = cnt; 1287 rq->dbuf = db; 1288 rq->buf = bp; 1289 } 1290 1291 /* 1292 * xyc_rqtopb: load up an IOPB based on an iorq 1293 */ 1294 1295 void 1296 xyc_rqtopb(iorq, iopb, cmd, subfun) 1297 struct xy_iorq *iorq; 1298 struct xy_iopb *iopb; 1299 int cmd, subfun; 1300 1301 { 1302 u_long block, dp; 1303 1304 /* normal IOPB case, standard stuff */ 1305 1306 /* chain bit handled later */ 1307 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1308 iopb->com = cmd; 1309 iopb->errno = 0; 1310 iopb->errs = 0; 1311 iopb->done = 0; 1312 if (iorq->xy) { 1313 iopb->unit = iorq->xy->xy_drive; 1314 iopb->dt = iorq->xy->drive_type; 1315 } else { 1316 iopb->unit = 0; 1317 iopb->dt = 0; 1318 } 1319 block = iorq->blockno; 1320 if (iorq->xy == NULL || block == 0) { 1321 iopb->sect = iopb->head = iopb->cyl = 0; 1322 } else { 1323 iopb->sect = block % iorq->xy->nsect; 1324 block = block / iorq->xy->nsect; 1325 iopb->head = block % iorq->xy->nhead; 1326 block = block / iorq->xy->nhead; 1327 iopb->cyl = block; 1328 } 1329 iopb->scnt = iorq->sectcnt; 1330 dp = (u_long) iorq->dbuf; 1331 if (iorq->dbuf == NULL) { 1332 iopb->dataa = 0; 1333 iopb->datar = 0; 1334 } else { 1335 iopb->dataa = (dp & 0xffff); 1336 iopb->datar = ((dp & 0xff0000) >> 16); 1337 } 1338 iopb->subfn = subfun; 1339 } 1340 1341 1342 /* 1343 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1344 */ 1345 1346 int 1347 xyc_unbusy(xyc, del) 1348 1349 struct xyc *xyc; 1350 int del; 1351 1352 { 1353 while (del-- > 0) { 1354 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1355 break; 1356 DELAY(1); 1357 } 1358 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1359 } 1360 1361 /* 1362 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1363 * note that NORM requests are handled separately. 1364 */ 1365 int 1366 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1367 struct xyc_softc *xycsc; 1368 int cmd, subfn, unit, block, scnt; 1369 char *dptr; 1370 int fullmode; 1371 1372 { 1373 int submode = XY_STATE(fullmode); 1374 struct xy_iorq *iorq = xycsc->ciorq; 1375 struct xy_iopb *iopb = xycsc->ciopb; 1376 1377 /* 1378 * is someone else using the control iopq wait for it if we can 1379 */ 1380 start: 1381 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1382 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1383 return(XY_ERR_FAIL); 1384 goto start; 1385 } 1386 1387 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1388 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1389 iorq->mode = XY_SUB_FREE; 1390 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1391 } 1392 1393 /* init iorq/iopb */ 1394 1395 xyc_rqinit(iorq, xycsc, 1396 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1397 fullmode, block, scnt, dptr, NULL); 1398 1399 /* load IOPB from iorq */ 1400 1401 xyc_rqtopb(iorq, iopb, cmd, subfn); 1402 1403 /* submit it for processing */ 1404 1405 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1406 1407 return(XY_ERR_AOK); 1408 } 1409 1410 /* 1411 * xyc_startbuf 1412 * start a buffer for running 1413 */ 1414 1415 int 1416 xyc_startbuf(xycsc, xysc, bp) 1417 struct xyc_softc *xycsc; 1418 struct xy_softc *xysc; 1419 struct buf *bp; 1420 1421 { 1422 int partno, error; 1423 struct xy_iorq *iorq; 1424 struct xy_iopb *iopb; 1425 u_long block; 1426 1427 iorq = xysc->xyrq; 1428 iopb = iorq->iopb; 1429 1430 /* get buf */ 1431 1432 if (bp == NULL) 1433 panic("xyc_startbuf null buf"); 1434 1435 partno = DISKPART(bp->b_dev); 1436 #ifdef XYC_DEBUG 1437 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1438 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1439 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1440 bp->b_bcount, bp->b_data); 1441 #endif 1442 1443 /* 1444 * load request. 1445 * 1446 * note that iorq points to the buffer as mapped into DVMA space, 1447 * where as the bp->b_data points to its non-DVMA mapping. 1448 */ 1449 1450 block = bp->b_rawblkno; 1451 1452 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1453 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1454 if (error != 0) { 1455 printf("%s: warning: cannot load DMA map\n", 1456 xycsc->sc_dev.dv_xname); 1457 return (XY_ERR_FAIL); /* XXX: need some sort of 1458 * call-back scheme here? */ 1459 } 1460 1461 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1462 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1463 ? BUS_DMASYNC_PREREAD 1464 : BUS_DMASYNC_PREWRITE); 1465 1466 /* init iorq and load iopb from it */ 1467 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1468 bp->b_bcount / XYFM_BPS, 1469 (caddr_t)(u_long)iorq->dmamap->dm_segs[0].ds_addr, 1470 bp); 1471 1472 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1473 1474 /* Instrumentation. */ 1475 disk_busy(&xysc->sc_dk); 1476 1477 return (XY_ERR_AOK); 1478 } 1479 1480 1481 /* 1482 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1483 * if ok. if it fail returns an error code. type is XY_SUB_*. 1484 * 1485 * note: caller frees iorq in all cases except NORM 1486 * 1487 * return value: 1488 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1489 * WAIT: XY_AOK (success), <error-code> (failed) 1490 * POLL: <same as WAIT> 1491 * NOQ : <same as NORM> 1492 * 1493 * there are three sources for i/o requests: 1494 * [1] xystrategy: normal block I/O, using "struct buf" system. 1495 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1496 * [3] open/ioctl: these are I/O requests done in the context of a process, 1497 * and the process should block until they are done. 1498 * 1499 * software state is stored in the iorq structure. each iorq has an 1500 * iopb structure. the hardware understands the iopb structure. 1501 * every command must go through an iopb. a 450 handles one iopb at a 1502 * time, where as a 451 can take them in chains. [the 450 claims it 1503 * can handle chains, but is appears to be buggy...] iopb are allocated 1504 * in DVMA space at boot up time. each disk gets one iopb, and the 1505 * controller gets one (for POLL and WAIT commands). what happens if 1506 * the iopb is busy? for i/o type [1], the buffers are queued at the 1507 * "buff" layer and * picked up later by the interrupt routine. for case 1508 * [2] we can only be blocked if there is a WAIT type I/O request being 1509 * run. since this can only happen when we are crashing, we wait a sec 1510 * and then steal the IOPB. for case [3] the process can sleep 1511 * on the iorq free list until some iopbs are avaliable. 1512 */ 1513 1514 1515 int 1516 xyc_submit_iorq(xycsc, iorq, type) 1517 struct xyc_softc *xycsc; 1518 struct xy_iorq *iorq; 1519 int type; 1520 1521 { 1522 struct xy_iopb *dmaiopb; 1523 1524 #ifdef XYC_DEBUG 1525 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1526 xycsc->sc_dev.dv_xname, iorq, type); 1527 #endif 1528 1529 /* first check and see if controller is busy */ 1530 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1531 #ifdef XYC_DEBUG 1532 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1533 #endif 1534 if (type == XY_SUB_NOQ) 1535 return (XY_ERR_FAIL); /* failed */ 1536 switch (type) { 1537 case XY_SUB_NORM: 1538 return XY_ERR_AOK; /* success */ 1539 case XY_SUB_WAIT: 1540 while (iorq->iopb->done == 0) { 1541 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1542 } 1543 return (iorq->errno); 1544 case XY_SUB_POLL: /* steal controller */ 1545 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1546 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1547 panic("xyc_submit_iorq: stuck xyc"); 1548 printf("%s: stole controller\n", 1549 xycsc->sc_dev.dv_xname); 1550 break; 1551 default: 1552 panic("xyc_submit_iorq adding"); 1553 } 1554 } 1555 1556 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1557 if (dmaiopb == NULL) { /* nothing doing? */ 1558 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1559 return(XY_ERR_AOK); 1560 panic("xyc_submit_iorq: xyc_chain failed!\n"); 1561 } 1562 1563 XYC_GO(xycsc->xyc, (u_long)dmaiopb); 1564 1565 /* command now running, wrap it up */ 1566 switch (type) { 1567 case XY_SUB_NORM: 1568 case XY_SUB_NOQ: 1569 return (XY_ERR_AOK); /* success */ 1570 case XY_SUB_WAIT: 1571 while (iorq->iopb->done == 0) { 1572 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1573 } 1574 return (iorq->errno); 1575 case XY_SUB_POLL: 1576 return (xyc_piodriver(xycsc, iorq)); 1577 default: 1578 panic("xyc_submit_iorq wrap up"); 1579 } 1580 panic("xyc_submit_iorq"); 1581 return 0; /* not reached */ 1582 } 1583 1584 1585 /* 1586 * xyc_chain: build a chain. return dvma address of first element in 1587 * the chain. iorq != NULL: means we only want that item on the chain. 1588 */ 1589 1590 struct xy_iopb * 1591 xyc_chain(xycsc, iorq) 1592 struct xyc_softc *xycsc; 1593 struct xy_iorq *iorq; 1594 1595 { 1596 int togo, chain, hand; 1597 1598 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1599 1600 /* 1601 * promote control IOPB to the top 1602 */ 1603 if (iorq == NULL) { 1604 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1605 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1606 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1607 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1608 } 1609 1610 /* 1611 * special case: if iorq != NULL then we have a POLL or WAIT request. 1612 * we let these take priority and do them first. 1613 */ 1614 if (iorq) { 1615 xycsc->xy_chain[0] = iorq; 1616 iorq->iopb->chen = 0; 1617 return(iorq->dmaiopb); 1618 } 1619 1620 /* 1621 * NORM case: do round robin and maybe chain (if allowed and possible) 1622 */ 1623 chain = 0; 1624 hand = xycsc->xy_hand; 1625 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1626 1627 for (togo = XYC_MAXIOPB; togo > 0; 1628 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1629 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1630 1631 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1632 xycsc->iopbase[hand].done) 1633 continue; /* not ready-for-i/o */ 1634 1635 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1636 iopb = xycsc->xy_chain[chain]->iopb; 1637 iopb->chen = 0; 1638 if (chain != 0) { 1639 /* adding a link to a chain */ 1640 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1641 prev_iopb->chen = 1; 1642 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1643 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1644 } else { 1645 /* head of chain */ 1646 iorq = xycsc->xy_chain[chain]; 1647 } 1648 chain++; 1649 1650 /* quit if chaining dis-allowed */ 1651 if (xycsc->no_ols) 1652 break; 1653 } 1654 1655 return(iorq ? iorq->dmaiopb : NULL); 1656 } 1657 1658 /* 1659 * xyc_piodriver 1660 * 1661 * programmed i/o driver. this function takes over the computer 1662 * and drains off the polled i/o request. it returns the status of the iorq 1663 * the caller is interesting in. 1664 */ 1665 int 1666 xyc_piodriver(xycsc, iorq) 1667 struct xyc_softc *xycsc; 1668 struct xy_iorq *iorq; 1669 1670 { 1671 int nreset = 0; 1672 int retval = 0; 1673 u_long res; 1674 #ifdef XYC_DEBUG 1675 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1676 #endif 1677 1678 while (iorq->iopb->done == 0) { 1679 1680 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1681 1682 /* we expect some progress soon */ 1683 if (res == XY_ERR_FAIL && nreset >= 2) { 1684 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1685 #ifdef XYC_DEBUG 1686 printf("xyc_piodriver: timeout\n"); 1687 #endif 1688 return (XY_ERR_FAIL); 1689 } 1690 if (res == XY_ERR_FAIL) { 1691 if (xyc_reset(xycsc, 0, 1692 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1693 XY_ERR_FAIL, 1694 0) == XY_ERR_FAIL) 1695 return (XY_ERR_FAIL); /* flushes all but POLL 1696 * requests, resets */ 1697 continue; 1698 } 1699 1700 xyc_remove_iorq(xycsc); /* may resubmit request */ 1701 1702 if (iorq->iopb->done == 0) 1703 xyc_start(xycsc, iorq); 1704 } 1705 1706 /* get return value */ 1707 1708 retval = iorq->errno; 1709 1710 #ifdef XYC_DEBUG 1711 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1712 iorq->errno, xyc_e2str(iorq->errno)); 1713 #endif 1714 1715 /* start up any bufs that have queued */ 1716 1717 xyc_start(xycsc, NULL); 1718 1719 return (retval); 1720 } 1721 1722 /* 1723 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1724 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1725 */ 1726 void 1727 xyc_xyreset(xycsc, xysc) 1728 struct xyc_softc *xycsc; 1729 struct xy_softc *xysc; 1730 1731 { 1732 struct xy_iopb tmpiopb; 1733 struct xy_iopb *iopb; 1734 int del; 1735 1736 iopb = xycsc->ciopb; 1737 1738 /* Save contents */ 1739 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1740 1741 iopb->chen = iopb->done = iopb->errs = 0; 1742 iopb->ien = 0; 1743 iopb->com = XYCMD_RST; 1744 iopb->unit = xysc->xy_drive; 1745 1746 XYC_GO(xycsc->xyc, (u_long)xycsc->ciorq->dmaiopb); 1747 1748 del = XYC_RESETUSEC; 1749 while (del > 0) { 1750 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1751 break; 1752 DELAY(1); 1753 del--; 1754 } 1755 1756 if (del <= 0 || iopb->errs) { 1757 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1758 xyc_e2str(iopb->errno)); 1759 del = xycsc->xyc->xyc_rsetup; 1760 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1761 panic("xyc_reset"); 1762 } else { 1763 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1764 } 1765 1766 /* Restore contents */ 1767 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1768 } 1769 1770 1771 /* 1772 * xyc_reset: reset everything: requests are marked as errors except 1773 * a polled request (which is resubmitted) 1774 */ 1775 int 1776 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1777 struct xyc_softc *xycsc; 1778 int quiet, error; 1779 struct xy_iorq *blastmode; 1780 struct xy_softc *xysc; 1781 1782 { 1783 int del = 0, lcv, retval = XY_ERR_AOK; 1784 1785 /* soft reset hardware */ 1786 1787 if (!quiet) 1788 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1789 del = xycsc->xyc->xyc_rsetup; 1790 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1791 if (del == XY_ERR_FAIL) { 1792 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1793 retval = XY_ERR_FAIL; 1794 } 1795 if (xysc) 1796 xyc_xyreset(xycsc, xysc); 1797 1798 /* fix queues based on "blast-mode" */ 1799 1800 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1801 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1802 1803 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1804 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1805 XY_STATE(iorq->mode) != XY_SUB_NORM) 1806 /* is it active? */ 1807 continue; 1808 1809 if (blastmode == XY_RSET_ALL || 1810 blastmode != iorq) { 1811 /* failed */ 1812 iorq->errno = error; 1813 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1814 switch (XY_STATE(iorq->mode)) { 1815 case XY_SUB_NORM: 1816 iorq->buf->b_error = EIO; 1817 iorq->buf->b_flags |= B_ERROR; 1818 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1819 1820 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1821 iorq->dmamap->dm_mapsize, 1822 (iorq->buf->b_flags & B_READ) 1823 ? BUS_DMASYNC_POSTREAD 1824 : BUS_DMASYNC_POSTWRITE); 1825 1826 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1827 1828 BUFQ_REMOVE(&iorq->xy->xyq, iorq->buf); 1829 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1830 (xycsc->reqs[lcv].buf->b_bcount - 1831 xycsc->reqs[lcv].buf->b_resid)); 1832 biodone(iorq->buf); 1833 iorq->mode = XY_SUB_FREE; 1834 break; 1835 case XY_SUB_WAIT: 1836 wakeup(iorq); 1837 case XY_SUB_POLL: 1838 iorq->mode = 1839 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1840 break; 1841 } 1842 1843 } else { 1844 1845 /* resubmit, no need to do anything here */ 1846 } 1847 } 1848 1849 /* 1850 * now, if stuff is waiting, start it. 1851 * since we just reset it should go 1852 */ 1853 xyc_start(xycsc, NULL); 1854 1855 return (retval); 1856 } 1857 1858 /* 1859 * xyc_start: start waiting buffers 1860 */ 1861 1862 void 1863 xyc_start(xycsc, iorq) 1864 struct xyc_softc *xycsc; 1865 struct xy_iorq *iorq; 1866 1867 { 1868 int lcv; 1869 struct xy_softc *xy; 1870 1871 if (iorq == NULL) { 1872 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1873 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1874 if (BUFQ_FIRST(&xy->xyq) == NULL) continue; 1875 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1876 xyc_startbuf(xycsc, xy, BUFQ_FIRST(&xy->xyq)); 1877 } 1878 } 1879 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1880 } 1881 1882 /* 1883 * xyc_remove_iorq: remove "done" IOPB's. 1884 */ 1885 1886 int 1887 xyc_remove_iorq(xycsc) 1888 struct xyc_softc *xycsc; 1889 1890 { 1891 int errno, rq, comm, errs; 1892 struct xyc *xyc = xycsc->xyc; 1893 u_long addr; 1894 struct xy_iopb *iopb; 1895 struct xy_iorq *iorq; 1896 struct buf *bp; 1897 1898 if (xyc->xyc_csr & XYC_DERR) { 1899 /* 1900 * DOUBLE ERROR: should never happen under normal use. This 1901 * error is so bad, you can't even tell which IOPB is bad, so 1902 * we dump them all. 1903 */ 1904 errno = XY_ERR_DERR; 1905 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1906 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1907 printf("%s: soft reset failed!\n", 1908 xycsc->sc_dev.dv_xname); 1909 panic("xyc_remove_iorq: controller DEAD"); 1910 } 1911 return (XY_ERR_AOK); 1912 } 1913 1914 /* 1915 * get iopb that is done, loop down the chain 1916 */ 1917 1918 if (xyc->xyc_csr & XYC_ERR) { 1919 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1920 } 1921 if (xyc->xyc_csr & XYC_IPND) { 1922 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1923 } 1924 1925 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1926 iorq = xycsc->xy_chain[rq]; 1927 if (iorq == NULL) break; /* done ! */ 1928 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1929 continue; /* free, or done */ 1930 iopb = iorq->iopb; 1931 if (iopb->done == 0) 1932 continue; /* not done yet */ 1933 1934 comm = iopb->com; 1935 errs = iopb->errs; 1936 1937 if (errs) 1938 iorq->errno = iopb->errno; 1939 else 1940 iorq->errno = 0; 1941 1942 /* handle non-fatal errors */ 1943 1944 if (errs && 1945 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1946 continue; /* AOK: we resubmitted it */ 1947 1948 1949 /* this iorq is now done (hasn't been restarted or anything) */ 1950 1951 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1952 xyc_perror(iorq, iopb, 0); 1953 1954 /* now, if read/write check to make sure we got all the data 1955 * we needed. (this may not be the case if we got an error in 1956 * the middle of a multisector request). */ 1957 1958 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1959 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1960 /* we just successfully processed a bad144 sector 1961 * note: if we are in bad 144 mode, the pointers have 1962 * been advanced already (see above) and are pointing 1963 * at the bad144 sector. to exit bad144 mode, we 1964 * must advance the pointers 1 sector and issue a new 1965 * request if there are still sectors left to process 1966 * 1967 */ 1968 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1969 1970 /* exit b144 mode */ 1971 iorq->mode = iorq->mode & (~XY_MODE_B144); 1972 1973 if (iorq->sectcnt) { /* more to go! */ 1974 iorq->lasterror = iorq->errno = iopb->errno = 0; 1975 iopb->errs = iopb->done = 0; 1976 iorq->tries = 0; 1977 iopb->scnt = iorq->sectcnt; 1978 iopb->cyl = iorq->blockno / 1979 iorq->xy->sectpercyl; 1980 iopb->head = 1981 (iorq->blockno / iorq->xy->nhead) % 1982 iorq->xy->nhead; 1983 iopb->sect = iorq->blockno % XYFM_BPS; 1984 addr = (u_long) iorq->dbuf; 1985 iopb->dataa = (addr & 0xffff); 1986 iopb->datar = ((addr & 0xff0000) >> 16); 1987 /* will resubit at end */ 1988 continue; 1989 } 1990 } 1991 /* final cleanup, totally done with this request */ 1992 1993 switch (XY_STATE(iorq->mode)) { 1994 case XY_SUB_NORM: 1995 bp = iorq->buf; 1996 if (errs) { 1997 bp->b_error = EIO; 1998 bp->b_flags |= B_ERROR; 1999 bp->b_resid = iorq->sectcnt * XYFM_BPS; 2000 } else { 2001 bp->b_resid = 0; /* done */ 2002 } 2003 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 2004 iorq->dmamap->dm_mapsize, 2005 (iorq->buf->b_flags & B_READ) 2006 ? BUS_DMASYNC_POSTREAD 2007 : BUS_DMASYNC_POSTWRITE); 2008 2009 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 2010 2011 BUFQ_REMOVE(&iorq->xy->xyq, bp); 2012 disk_unbusy(&iorq->xy->sc_dk, 2013 (bp->b_bcount - bp->b_resid)); 2014 iorq->mode = XY_SUB_FREE; 2015 biodone(bp); 2016 break; 2017 case XY_SUB_WAIT: 2018 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2019 wakeup(iorq); 2020 break; 2021 case XY_SUB_POLL: 2022 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2023 break; 2024 } 2025 } 2026 2027 return (XY_ERR_AOK); 2028 } 2029 2030 /* 2031 * xyc_perror: print error. 2032 * - if still_trying is true: we got an error, retried and got a 2033 * different error. in that case lasterror is the old error, 2034 * and errno is the new one. 2035 * - if still_trying is not true, then if we ever had an error it 2036 * is in lasterror. also, if iorq->errno == 0, then we recovered 2037 * from that error (otherwise iorq->errno == iorq->lasterror). 2038 */ 2039 void 2040 xyc_perror(iorq, iopb, still_trying) 2041 struct xy_iorq *iorq; 2042 struct xy_iopb *iopb; 2043 int still_trying; 2044 2045 { 2046 2047 int error = iorq->lasterror; 2048 2049 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 2050 : iorq->xyc->sc_dev.dv_xname); 2051 if (iorq->buf) 2052 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2053 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2054 printf("%s %d/%d/%d: ", 2055 (iopb->com == XYCMD_RD) ? "read" : "write", 2056 iopb->cyl, iopb->head, iopb->sect); 2057 printf("%s", xyc_e2str(error)); 2058 2059 if (still_trying) 2060 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 2061 else 2062 if (iorq->errno == 0) 2063 printf(" [recovered in %d tries]", iorq->tries); 2064 2065 printf("\n"); 2066 } 2067 2068 /* 2069 * xyc_error: non-fatal error encountered... recover. 2070 * return AOK if resubmitted, return FAIL if this iopb is done 2071 */ 2072 int 2073 xyc_error(xycsc, iorq, iopb, comm) 2074 struct xyc_softc *xycsc; 2075 struct xy_iorq *iorq; 2076 struct xy_iopb *iopb; 2077 int comm; 2078 2079 { 2080 int errno = iorq->errno; 2081 int erract = xyc_entoact(errno); 2082 int oldmode, advance; 2083 #ifdef __sparc__ 2084 int i; 2085 #endif 2086 2087 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2088 oldmode = iorq->mode; 2089 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2090 /* make xyc_start ignore us */ 2091 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 2092 iorq->mode = oldmode; 2093 } 2094 /* check for read/write to a sector in bad144 table if bad: redirect 2095 * request to bad144 area */ 2096 2097 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2098 (iorq->mode & XY_MODE_B144) == 0) { 2099 advance = iorq->sectcnt - iopb->scnt; 2100 XYC_ADVANCE(iorq, advance); 2101 #ifdef __sparc__ 2102 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2103 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2104 iorq->blockno % iorq->xy->nsect)) != -1) { 2105 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2106 * redirect */ 2107 iopb->errno = iopb->done = iopb->errs = 0; 2108 iopb->scnt = 1; 2109 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2110 /* second to last acyl */ 2111 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2112 * standard */ 2113 iopb->head = i / iorq->xy->nhead; 2114 iopb->sect = i % iorq->xy->nhead; 2115 /* will resubmit when we come out of remove_iorq */ 2116 return (XY_ERR_AOK); /* recovered! */ 2117 } 2118 #endif 2119 } 2120 2121 /* 2122 * it isn't a bad144 sector, must be real error! see if we can retry 2123 * it? 2124 */ 2125 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2126 xyc_perror(iorq, iopb, 1); /* inform of error state 2127 * change */ 2128 iorq->lasterror = errno; 2129 2130 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2131 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2132 iorq->tries++; 2133 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 2134 /* will resubmit at end of remove_iorq */ 2135 return (XY_ERR_AOK); /* recovered! */ 2136 } 2137 2138 /* failed to recover from this error */ 2139 return (XY_ERR_FAIL); 2140 } 2141 2142 /* 2143 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2144 */ 2145 void 2146 xyc_tick(arg) 2147 void *arg; 2148 2149 { 2150 struct xyc_softc *xycsc = arg; 2151 int lcv, s, reset = 0; 2152 2153 /* reduce ttl for each request if one goes to zero, reset xyc */ 2154 s = splbio(); 2155 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2156 if (xycsc->reqs[lcv].mode == 0 || 2157 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2158 continue; 2159 xycsc->reqs[lcv].ttl--; 2160 if (xycsc->reqs[lcv].ttl == 0) 2161 reset = 1; 2162 } 2163 if (reset) { 2164 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2165 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2166 } 2167 splx(s); 2168 2169 /* until next time */ 2170 2171 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2172 } 2173 2174 /* 2175 * xyc_ioctlcmd: this function provides a user level interface to the 2176 * controller via ioctl. this allows "format" programs to be written 2177 * in user code, and is also useful for some debugging. we return 2178 * an error code. called at user priority. 2179 * 2180 * XXX missing a few commands (see the 7053 driver for ideas) 2181 */ 2182 int 2183 xyc_ioctlcmd(xy, dev, xio) 2184 struct xy_softc *xy; 2185 dev_t dev; 2186 struct xd_iocmd *xio; 2187 2188 { 2189 int s, rqno, dummy = 0; 2190 caddr_t dvmabuf = NULL, buf = NULL; 2191 struct xyc_softc *xycsc; 2192 int rseg, error; 2193 bus_dma_segment_t seg; 2194 2195 /* check sanity of requested command */ 2196 2197 switch (xio->cmd) { 2198 2199 case XYCMD_NOP: /* no op: everything should be zero */ 2200 if (xio->subfn || xio->dptr || xio->dlen || 2201 xio->block || xio->sectcnt) 2202 return (EINVAL); 2203 break; 2204 2205 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2206 case XYCMD_WR: 2207 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2208 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2209 return (EINVAL); 2210 break; 2211 2212 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2213 return (EINVAL); 2214 2215 break; 2216 2217 default: 2218 return (EINVAL);/* ??? */ 2219 } 2220 2221 xycsc = xy->parent; 2222 2223 /* create DVMA buffer for request if needed */ 2224 if (xio->dlen) { 2225 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2226 &seg, &rseg, 2227 xio->dlen, &buf, 2228 (bus_addr_t *)&dvmabuf)) != 0) { 2229 return (error); 2230 } 2231 2232 if (xio->cmd == XYCMD_WR) { 2233 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2234 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2235 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2236 return (error); 2237 } 2238 } 2239 } 2240 /* do it! */ 2241 2242 error = 0; 2243 s = splbio(); 2244 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2245 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2246 if (rqno == XY_ERR_FAIL) { 2247 error = EIO; 2248 goto done; 2249 } 2250 xio->errno = xycsc->ciorq->errno; 2251 xio->tries = xycsc->ciorq->tries; 2252 XYC_DONE(xycsc, dummy); 2253 2254 if (xio->cmd == XYCMD_RD) 2255 error = copyout(buf, xio->dptr, xio->dlen); 2256 2257 done: 2258 splx(s); 2259 if (dvmabuf) { 2260 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2261 xio->dlen, buf); 2262 } 2263 return (error); 2264 } 2265 2266 /* 2267 * xyc_e2str: convert error code number into an error string 2268 */ 2269 char * 2270 xyc_e2str(no) 2271 int no; 2272 { 2273 switch (no) { 2274 case XY_ERR_FAIL: 2275 return ("Software fatal error"); 2276 case XY_ERR_DERR: 2277 return ("DOUBLE ERROR"); 2278 case XY_ERR_AOK: 2279 return ("Successful completion"); 2280 case XY_ERR_IPEN: 2281 return("Interrupt pending"); 2282 case XY_ERR_BCFL: 2283 return("Busy conflict"); 2284 case XY_ERR_TIMO: 2285 return("Operation timeout"); 2286 case XY_ERR_NHDR: 2287 return("Header not found"); 2288 case XY_ERR_HARD: 2289 return("Hard ECC error"); 2290 case XY_ERR_ICYL: 2291 return("Illegal cylinder address"); 2292 case XY_ERR_ISEC: 2293 return("Illegal sector address"); 2294 case XY_ERR_SMAL: 2295 return("Last sector too small"); 2296 case XY_ERR_SACK: 2297 return("Slave ACK error (non-existent memory)"); 2298 case XY_ERR_CHER: 2299 return("Cylinder and head/header error"); 2300 case XY_ERR_SRTR: 2301 return("Auto-seek retry successful"); 2302 case XY_ERR_WPRO: 2303 return("Write-protect error"); 2304 case XY_ERR_UIMP: 2305 return("Unimplemented command"); 2306 case XY_ERR_DNRY: 2307 return("Drive not ready"); 2308 case XY_ERR_SZER: 2309 return("Sector count zero"); 2310 case XY_ERR_DFLT: 2311 return("Drive faulted"); 2312 case XY_ERR_ISSZ: 2313 return("Illegal sector size"); 2314 case XY_ERR_SLTA: 2315 return("Self test A"); 2316 case XY_ERR_SLTB: 2317 return("Self test B"); 2318 case XY_ERR_SLTC: 2319 return("Self test C"); 2320 case XY_ERR_SOFT: 2321 return("Soft ECC error"); 2322 case XY_ERR_SFOK: 2323 return("Soft ECC error recovered"); 2324 case XY_ERR_IHED: 2325 return("Illegal head"); 2326 case XY_ERR_DSEQ: 2327 return("Disk sequencer error"); 2328 case XY_ERR_SEEK: 2329 return("Seek error"); 2330 default: 2331 return ("Unknown error"); 2332 } 2333 } 2334 2335 int 2336 xyc_entoact(errno) 2337 2338 int errno; 2339 2340 { 2341 switch (errno) { 2342 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2343 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2344 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2345 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2346 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2347 2348 return(XY_ERA_PROG); /* program error ! */ 2349 2350 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2351 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2352 case XY_ERR_SOFT: 2353 2354 return(XY_ERA_HARD); /* hard error, retry */ 2355 2356 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2357 2358 return(XY_ERA_RSET); /* hard error reset */ 2359 2360 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2361 2362 return(XY_ERA_SOFT); /* an FYI error */ 2363 2364 case XY_ERR_WPRO: 2365 2366 return(XY_ERA_WPRO); /* write protect */ 2367 } 2368 2369 return(XY_ERA_PROG); /* ??? */ 2370 } 2371