xy.c revision 1.50
1 /* $NetBSD: xy.c,v 1.50 2003/06/29 09:56:32 darrenr 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 (at) 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 (at) achilles.net>'s unfinished 450/451 driver 50 * 51 */ 52 53 #include <sys/cdefs.h> 54 __KERNEL_RCSID(0, "$NetBSD: xy.c,v 1.50 2003/06/29 09:56:32 darrenr 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 /* 193 * cfattach's: device driver interface to autoconfig 194 */ 195 196 CFATTACH_DECL(xyc, sizeof(struct xyc_softc), 197 xycmatch, xycattach, NULL, NULL); 198 199 CFATTACH_DECL(xy, sizeof(struct xy_softc), 200 xymatch, xyattach, NULL, NULL); 201 202 extern struct cfdriver xy_cd; 203 204 dev_type_open(xyopen); 205 dev_type_close(xyclose); 206 dev_type_read(xyread); 207 dev_type_write(xywrite); 208 dev_type_ioctl(xyioctl); 209 dev_type_strategy(xystrategy); 210 dev_type_dump(xydump); 211 dev_type_size(xysize); 212 213 const struct bdevsw xy_bdevsw = { 214 xyopen, xyclose, xystrategy, xyioctl, xydump, xysize, D_DISK 215 }; 216 217 const struct cdevsw xy_cdevsw = { 218 xyopen, xyclose, xyread, xywrite, xyioctl, 219 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 220 }; 221 222 struct xyc_attach_args { /* this is the "aux" args to xyattach */ 223 int driveno; /* unit number */ 224 int fullmode; /* submit mode */ 225 int booting; /* are we booting or not? */ 226 }; 227 228 /* 229 * dkdriver 230 */ 231 232 struct dkdriver xydkdriver = { xystrategy }; 233 234 /* 235 * start: disk label fix code (XXX) 236 */ 237 238 static void *xy_labeldata; 239 240 static void 241 xydummystrat(bp) 242 struct buf *bp; 243 { 244 if (bp->b_bcount != XYFM_BPS) 245 panic("xydummystrat"); 246 bcopy(xy_labeldata, bp->b_data, XYFM_BPS); 247 bp->b_flags |= B_DONE; 248 bp->b_flags &= ~B_BUSY; 249 } 250 251 int 252 xygetdisklabel(xy, b) 253 struct xy_softc *xy; 254 void *b; 255 { 256 const char *err; 257 #if defined(__sparc__) || defined(sun3) 258 struct sun_disklabel *sdl; 259 #endif 260 261 /* We already have the label data in `b'; setup for dummy strategy */ 262 xy_labeldata = b; 263 264 /* Required parameter for readdisklabel() */ 265 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; 266 267 err = readdisklabel(MAKEDISKDEV(0, xy->sc_dev.dv_unit, RAW_PART), 268 xydummystrat, 269 xy->sc_dk.dk_label, xy->sc_dk.dk_cpulabel); 270 if (err) { 271 printf("%s: %s\n", xy->sc_dev.dv_xname, err); 272 return(XY_ERR_FAIL); 273 } 274 275 #if defined(__sparc__) || defined(sun3) 276 /* Ok, we have the label; fill in `pcyl' if there's SunOS magic */ 277 sdl = (struct sun_disklabel *)xy->sc_dk.dk_cpulabel->cd_block; 278 if (sdl->sl_magic == SUN_DKMAGIC) { 279 xy->pcyl = sdl->sl_pcylinders; 280 } else 281 #endif 282 { 283 printf("%s: WARNING: no `pcyl' in disk label.\n", 284 xy->sc_dev.dv_xname); 285 xy->pcyl = xy->sc_dk.dk_label->d_ncylinders + 286 xy->sc_dk.dk_label->d_acylinders; 287 printf("%s: WARNING: guessing pcyl=%d (ncyl+acyl)\n", 288 xy->sc_dev.dv_xname, xy->pcyl); 289 } 290 291 xy->ncyl = xy->sc_dk.dk_label->d_ncylinders; 292 xy->acyl = xy->sc_dk.dk_label->d_acylinders; 293 xy->nhead = xy->sc_dk.dk_label->d_ntracks; 294 xy->nsect = xy->sc_dk.dk_label->d_nsectors; 295 xy->sectpercyl = xy->nhead * xy->nsect; 296 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; /* not handled by 297 * sun->bsd */ 298 return(XY_ERR_AOK); 299 } 300 301 /* 302 * end: disk label fix code (XXX) 303 */ 304 305 /* 306 * Shorthand for allocating, mapping and loading a DMA buffer 307 */ 308 int 309 xy_dmamem_alloc(tag, map, seg, nsegp, len, kvap, dmap) 310 bus_dma_tag_t tag; 311 bus_dmamap_t map; 312 bus_dma_segment_t *seg; 313 int *nsegp; 314 bus_size_t len; 315 caddr_t *kvap; 316 bus_addr_t *dmap; 317 { 318 int nseg; 319 int error; 320 321 if ((error = bus_dmamem_alloc(tag, len, 0, 0, 322 seg, 1, &nseg, BUS_DMA_NOWAIT)) != 0) { 323 return (error); 324 } 325 326 if ((error = bus_dmamem_map(tag, seg, nseg, 327 len, kvap, 328 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 329 bus_dmamem_free(tag, seg, nseg); 330 return (error); 331 } 332 333 if ((error = bus_dmamap_load(tag, map, *kvap, len, NULL, 334 BUS_DMA_NOWAIT)) != 0) { 335 bus_dmamem_unmap(tag, *kvap, len); 336 bus_dmamem_free(tag, seg, nseg); 337 return (error); 338 } 339 340 *dmap = map->dm_segs[0].ds_addr; 341 *nsegp = nseg; 342 return (0); 343 } 344 345 void 346 xy_dmamem_free(tag, map, seg, nseg, len, kva) 347 bus_dma_tag_t tag; 348 bus_dmamap_t map; 349 bus_dma_segment_t *seg; 350 int nseg; 351 bus_size_t len; 352 caddr_t kva; 353 { 354 355 bus_dmamap_unload(tag, map); 356 bus_dmamem_unmap(tag, kva, len); 357 bus_dmamem_free(tag, seg, nseg); 358 } 359 360 361 /* 362 * a u t o c o n f i g f u n c t i o n s 363 */ 364 365 /* 366 * xycmatch: determine if xyc is present or not. we do a 367 * soft reset to detect the xyc. 368 */ 369 int 370 xyc_probe(arg, tag, handle) 371 void *arg; 372 bus_space_tag_t tag; 373 bus_space_handle_t handle; 374 { 375 struct xyc *xyc = (void *)handle; /* XXX */ 376 377 return ((xyc_unbusy(xyc, XYC_RESETUSEC) != XY_ERR_FAIL) ? 0 : EIO); 378 } 379 380 int xycmatch(parent, cf, aux) 381 struct device *parent; 382 struct cfdata *cf; 383 void *aux; 384 { 385 struct vme_attach_args *va = aux; 386 vme_chipset_tag_t ct = va->va_vct; 387 vme_am_t mod; 388 int error; 389 390 mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 391 if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod)) 392 return (0); 393 394 error = vme_probe(ct, va->r[0].offset, sizeof(struct xyc), 395 mod, VME_D16, xyc_probe, 0); 396 vme_space_free(va->va_vct, va->r[0].offset, sizeof(struct xyc), mod); 397 398 return (error == 0); 399 } 400 401 /* 402 * xycattach: attach controller 403 */ 404 void 405 xycattach(parent, self, aux) 406 struct device *parent, *self; 407 void *aux; 408 409 { 410 struct xyc_softc *xyc = (void *) self; 411 struct vme_attach_args *va = aux; 412 vme_chipset_tag_t ct = va->va_vct; 413 bus_space_tag_t bt; 414 bus_space_handle_t bh; 415 vme_intr_handle_t ih; 416 vme_am_t mod; 417 struct xyc_attach_args xa; 418 int lcv, res, error; 419 bus_dma_segment_t seg; 420 int rseg; 421 vme_mapresc_t resc; 422 423 /* get addressing and intr level stuff from autoconfig and load it 424 * into our xyc_softc. */ 425 426 mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 427 428 if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod)) 429 panic("xyc: vme alloc"); 430 431 if (vme_space_map(ct, va->r[0].offset, sizeof(struct xyc), 432 mod, VME_D16, 0, &bt, &bh, &resc) != 0) 433 panic("xyc: vme_map"); 434 435 xyc->xyc = (struct xyc *) bh; /* XXX */ 436 xyc->ipl = va->ilevel; 437 xyc->vector = va->ivector; 438 xyc->no_ols = 0; /* XXX should be from config */ 439 440 for (lcv = 0; lcv < XYC_MAXDEV; lcv++) 441 xyc->sc_drives[lcv] = (struct xy_softc *) 0; 442 443 /* 444 * allocate and zero buffers 445 * check boundaries of the KVA's ... all IOPBs must reside in 446 * the same 64K region. 447 */ 448 449 /* Get DMA handle for misc. transfers */ 450 if ((error = vme_dmamap_create( 451 ct, /* VME chip tag */ 452 MAXPHYS, /* size */ 453 VME_AM_A24, /* address modifier */ 454 VME_D16, /* data size */ 455 0, /* swap */ 456 1, /* nsegments */ 457 MAXPHYS, /* maxsegsz */ 458 0, /* boundary */ 459 BUS_DMA_NOWAIT, 460 &xyc->reqs[lcv].dmamap)) != 0) { 461 462 printf("%s: DMA buffer map create error %d\n", 463 xyc->sc_dev.dv_xname, error); 464 return; 465 } 466 467 /* Get DMA handle for mapping iorq descriptors */ 468 if ((error = vme_dmamap_create( 469 ct, /* VME chip tag */ 470 XYC_MAXIOPB * sizeof(struct xy_iopb), 471 VME_AM_A24, /* address modifier */ 472 VME_D16, /* data size */ 473 0, /* swap */ 474 1, /* nsegments */ 475 XYC_MAXIOPB * sizeof(struct xy_iopb), 476 64*1024, /* boundary */ 477 BUS_DMA_NOWAIT, 478 &xyc->iopmap)) != 0) { 479 480 printf("%s: DMA buffer map create error %d\n", 481 xyc->sc_dev.dv_xname, error); 482 return; 483 } 484 485 /* Get DMA buffer for iorq descriptors */ 486 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->iopmap, &seg, &rseg, 487 XYC_MAXIOPB * sizeof(struct xy_iopb), 488 (caddr_t *)&xyc->iopbase, 489 (bus_addr_t *)&xyc->dvmaiopb)) != 0) { 490 printf("%s: DMA buffer alloc error %d\n", 491 xyc->sc_dev.dv_xname, error); 492 return; 493 } 494 495 bzero(xyc->iopbase, XYC_MAXIOPB * sizeof(struct xy_iopb)); 496 497 xyc->reqs = (struct xy_iorq *) 498 malloc(XYC_MAXIOPB * sizeof(struct xy_iorq), 499 M_DEVBUF, M_NOWAIT|M_ZERO); 500 if (xyc->reqs == NULL) 501 panic("xyc malloc"); 502 503 /* 504 * init iorq to iopb pointers, and non-zero fields in the 505 * iopb which never change. 506 */ 507 508 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 509 xyc->xy_chain[lcv] = NULL; 510 xyc->reqs[lcv].iopb = &xyc->iopbase[lcv]; 511 xyc->reqs[lcv].dmaiopb = &xyc->dvmaiopb[lcv]; 512 xyc->iopbase[lcv].asr = 1; /* always the same */ 513 xyc->iopbase[lcv].eef = 1; /* always the same */ 514 xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */ 515 xyc->iopbase[lcv].aud = 1; /* always the same */ 516 xyc->iopbase[lcv].relo = 1; /* always the same */ 517 xyc->iopbase[lcv].thro = XY_THRO;/* always the same */ 518 519 if ((error = vme_dmamap_create( 520 ct, /* VME chip tag */ 521 MAXPHYS, /* size */ 522 VME_AM_A24, /* address modifier */ 523 VME_D16, /* data size */ 524 0, /* swap */ 525 1, /* nsegments */ 526 MAXPHYS, /* maxsegsz */ 527 0, /* boundary */ 528 BUS_DMA_NOWAIT, 529 &xyc->reqs[lcv].dmamap)) != 0) { 530 531 printf("%s: DMA buffer map create error %d\n", 532 xyc->sc_dev.dv_xname, error); 533 return; 534 } 535 } 536 xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */ 537 xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */ 538 xyc->xy_hand = 0; 539 540 /* read controller parameters and insure we have a 450/451 */ 541 542 error = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL); 543 res = xyc->ciopb->ctyp; 544 XYC_DONE(xyc, error); 545 if (res != XYCT_450) { 546 if (error) 547 printf(": %s: ", xyc_e2str(error)); 548 printf(": doesn't identify as a 450/451\n"); 549 return; 550 } 551 printf(": Xylogics 450/451"); 552 if (xyc->no_ols) 553 printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */ 554 printf("\n"); 555 if (error) { 556 printf("%s: error: %s\n", xyc->sc_dev.dv_xname, 557 xyc_e2str(error)); 558 return; 559 } 560 if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) { 561 printf("%s: 24 bit addressing turned off\n", 562 xyc->sc_dev.dv_xname); 563 printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n"); 564 printf("to enable 24 bit mode and this driver\n"); 565 return; 566 } 567 568 /* link in interrupt with higher level software */ 569 vme_intr_map(ct, va->ilevel, va->ivector, &ih); 570 vme_intr_establish(ct, ih, IPL_BIO, xycintr, xyc); 571 evcnt_attach_dynamic(&xyc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 572 xyc->sc_dev.dv_xname, "intr"); 573 574 callout_init(&xyc->sc_tick_ch); 575 576 /* now we must look for disks using autoconfig */ 577 xa.fullmode = XY_SUB_POLL; 578 xa.booting = 1; 579 580 for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++) 581 (void) config_found(self, (void *) &xa, NULL); 582 583 /* start the watchdog clock */ 584 callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc); 585 586 } 587 588 /* 589 * xymatch: probe for disk. 590 * 591 * note: we almost always say disk is present. this allows us to 592 * spin up and configure a disk after the system is booted (we can 593 * call xyattach!). 594 */ 595 int 596 xymatch(parent, cf, aux) 597 struct device *parent; 598 struct cfdata *cf; 599 void *aux; 600 { 601 struct xyc_attach_args *xa = aux; 602 603 /* looking for autoconf wildcard or exact match */ 604 605 if (cf->cf_loc[XYCCF_DRIVE] != XYCCF_DRIVE_DEFAULT && 606 cf->cf_loc[XYCCF_DRIVE] != xa->driveno) 607 return 0; 608 609 return 1; 610 611 } 612 613 /* 614 * xyattach: attach a disk. this can be called from autoconf and also 615 * from xyopen/xystrategy. 616 */ 617 void 618 xyattach(parent, self, aux) 619 struct device *parent, *self; 620 void *aux; 621 622 { 623 struct xy_softc *xy = (void *) self, *oxy; 624 struct xyc_softc *xyc = (void *) parent; 625 struct xyc_attach_args *xa = aux; 626 int spt, mb, blk, lcv, fmode, s = 0, newstate; 627 struct dkbad *dkb; 628 int rseg, error; 629 bus_dma_segment_t seg; 630 caddr_t dmaddr; 631 caddr_t buf; 632 633 /* 634 * Always re-initialize the disk structure. We want statistics 635 * to start with a clean slate. 636 */ 637 bzero(&xy->sc_dk, sizeof(xy->sc_dk)); 638 xy->sc_dk.dk_driver = &xydkdriver; 639 xy->sc_dk.dk_name = xy->sc_dev.dv_xname; 640 641 /* if booting, init the xy_softc */ 642 643 if (xa->booting) { 644 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 645 xy->flags = 0; 646 xy->parent = xyc; 647 648 /* init queue of waiting bufs */ 649 650 bufq_alloc(&xy->xyq, BUFQ_DISKSORT|BUFQ_SORT_RAWBLOCK); 651 652 xy->xyrq = &xyc->reqs[xa->driveno]; 653 654 } 655 xy->xy_drive = xa->driveno; 656 fmode = xa->fullmode; 657 xyc->sc_drives[xa->driveno] = xy; 658 659 /* if not booting, make sure we are the only process in the attach for 660 * this drive. if locked out, sleep on it. */ 661 662 if (!xa->booting) { 663 s = splbio(); 664 while (xy->state == XY_DRIVE_ATTACHING) { 665 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 666 splx(s); 667 return; 668 } 669 } 670 printf("%s at %s", 671 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 672 } 673 674 /* we now have control */ 675 xy->state = XY_DRIVE_ATTACHING; 676 newstate = XY_DRIVE_UNKNOWN; 677 678 buf = NULL; 679 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->auxmap, &seg, &rseg, 680 XYFM_BPS, 681 (caddr_t *)&buf, 682 (bus_addr_t *)&dmaddr)) != 0) { 683 printf("%s: DMA buffer alloc error %d\n", 684 xyc->sc_dev.dv_xname, error); 685 return; 686 } 687 688 /* first try and reset the drive */ 689 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 690 XYC_DONE(xyc, error); 691 if (error == XY_ERR_DNRY) { 692 printf(" drive %d: off-line\n", xa->driveno); 693 goto done; 694 } 695 if (error) { 696 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 697 goto done; 698 } 699 printf(" drive %d: ready", xa->driveno); 700 701 /* 702 * now set drive parameters (to semi-bogus values) so we can read the 703 * disk label. 704 */ 705 xy->pcyl = xy->ncyl = 1; 706 xy->acyl = 0; 707 xy->nhead = 1; 708 xy->nsect = 1; 709 xy->sectpercyl = 1; 710 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 711 xy->dkb.bt_bad[lcv].bt_cyl = 712 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 713 714 /* read disk label */ 715 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 716 xy->drive_type++) { 717 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 718 dmaddr, fmode); 719 XYC_DONE(xyc, error); 720 if (error == XY_ERR_AOK) break; 721 } 722 723 if (error != XY_ERR_AOK) { 724 printf("\n%s: reading disk label failed: %s\n", 725 xy->sc_dev.dv_xname, xyc_e2str(error)); 726 goto done; 727 } 728 printf(" (drive type %d)\n", xy->drive_type); 729 730 newstate = XY_DRIVE_NOLABEL; 731 732 xy->hw_spt = spt = 0; /* XXX needed ? */ 733 /* Attach the disk: must be before getdisklabel to malloc label */ 734 disk_attach(&xy->sc_dk); 735 736 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 737 goto done; 738 739 /* inform the user of what is up */ 740 printf("%s: <%s>, pcyl %d\n", xy->sc_dev.dv_xname, 741 buf, xy->pcyl); 742 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 743 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 744 xy->sc_dev.dv_xname, mb, xy->ncyl, xy->nhead, xy->nsect, 745 XYFM_BPS); 746 747 /* 748 * 450/451 stupidity: the drive type is encoded into the format 749 * of the disk. the drive type in the IOPB must match the drive 750 * type in the format, or you will not be able to do I/O to the 751 * disk (you get header not found errors). if you have two drives 752 * of different sizes that have the same drive type in their 753 * formatting then you are out of luck. 754 * 755 * this problem was corrected in the 753/7053. 756 */ 757 758 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 759 oxy = xyc->sc_drives[lcv]; 760 if (oxy == NULL || oxy == xy) continue; 761 if (oxy->drive_type != xy->drive_type) continue; 762 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 763 xy->nhead != oxy->nhead) { 764 printf("%s: %s and %s must be the same size!\n", 765 xyc->sc_dev.dv_xname, xy->sc_dev.dv_xname, 766 oxy->sc_dev.dv_xname); 767 panic("xy drive size mismatch"); 768 } 769 } 770 771 772 /* now set the real drive parameters! */ 773 774 blk = (xy->nsect - 1) + 775 ((xy->nhead - 1) * xy->nsect) + 776 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 777 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 778 XYC_DONE(xyc, error); 779 if (error) { 780 printf("%s: write drive size failed: %s\n", 781 xy->sc_dev.dv_xname, xyc_e2str(error)); 782 goto done; 783 } 784 newstate = XY_DRIVE_ONLINE; 785 786 /* 787 * read bad144 table. this table resides on the first sector of the 788 * last track of the disk (i.e. second cyl of "acyl" area). 789 */ 790 791 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 792 /* last cyl */ 793 (xy->nhead - 1) * xy->nsect; /* last head */ 794 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 795 dmaddr, fmode); 796 XYC_DONE(xyc, error); 797 if (error) { 798 printf("%s: reading bad144 failed: %s\n", 799 xy->sc_dev.dv_xname, xyc_e2str(error)); 800 goto done; 801 } 802 803 /* check dkbad for sanity */ 804 dkb = (struct dkbad *) buf; 805 for (lcv = 0; lcv < 126; lcv++) { 806 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 807 dkb->bt_bad[lcv].bt_cyl == 0) && 808 dkb->bt_bad[lcv].bt_trksec == 0xffff) 809 continue; /* blank */ 810 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 811 break; 812 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 813 break; 814 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 815 break; 816 } 817 if (lcv != 126) { 818 printf("%s: warning: invalid bad144 sector!\n", 819 xy->sc_dev.dv_xname); 820 } else { 821 bcopy(buf, &xy->dkb, XYFM_BPS); 822 } 823 824 done: 825 if (buf != NULL) { 826 xy_dmamem_free(xyc->dmatag, xyc->auxmap, 827 &seg, rseg, XYFM_BPS, buf); 828 } 829 830 xy->state = newstate; 831 if (!xa->booting) { 832 wakeup(&xy->state); 833 splx(s); 834 } 835 } 836 837 /* 838 * end of autoconfig functions 839 */ 840 841 /* 842 * { b , c } d e v s w f u n c t i o n s 843 */ 844 845 /* 846 * xyclose: close device 847 */ 848 int 849 xyclose(dev, flag, fmt, l) 850 dev_t dev; 851 int flag, fmt; 852 struct lwp *l; 853 854 { 855 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 856 int part = DISKPART(dev); 857 858 /* clear mask bits */ 859 860 switch (fmt) { 861 case S_IFCHR: 862 xy->sc_dk.dk_copenmask &= ~(1 << part); 863 break; 864 case S_IFBLK: 865 xy->sc_dk.dk_bopenmask &= ~(1 << part); 866 break; 867 } 868 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 869 870 return 0; 871 } 872 873 /* 874 * xydump: crash dump system 875 */ 876 int 877 xydump(dev, blkno, va, size) 878 dev_t dev; 879 daddr_t blkno; 880 caddr_t va; 881 size_t size; 882 { 883 int unit, part; 884 struct xy_softc *xy; 885 886 unit = DISKUNIT(dev); 887 if (unit >= xy_cd.cd_ndevs) 888 return ENXIO; 889 part = DISKPART(dev); 890 891 xy = xy_cd.cd_devs[unit]; 892 893 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 894 'a' + part); 895 896 return ENXIO; 897 898 /* outline: globals: "dumplo" == sector number of partition to start 899 * dump at (convert to physical sector with partition table) 900 * "dumpsize" == size of dump in clicks "physmem" == size of physical 901 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 902 * physmem) 903 * 904 * dump a copy of physical memory to the dump device starting at sector 905 * "dumplo" in the swap partition (make sure > 0). map in pages as 906 * we go. use polled I/O. 907 * 908 * XXX how to handle NON_CONTIG? */ 909 910 } 911 912 /* 913 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 914 */ 915 int 916 xyioctl(dev, command, addr, flag, l) 917 dev_t dev; 918 u_long command; 919 caddr_t addr; 920 int flag; 921 struct lwp *l; 922 923 { 924 struct proc *p = l->l_proc; 925 struct xy_softc *xy; 926 struct xd_iocmd *xio; 927 int error, s, unit; 928 #ifdef __HAVE_OLD_DISKLABEL 929 struct disklabel newlabel; 930 #endif 931 struct disklabel *lp; 932 933 unit = DISKUNIT(dev); 934 935 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 936 return (ENXIO); 937 938 /* switch on ioctl type */ 939 940 switch (command) { 941 case DIOCSBAD: /* set bad144 info */ 942 if ((flag & FWRITE) == 0) 943 return EBADF; 944 s = splbio(); 945 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 946 splx(s); 947 return 0; 948 949 case DIOCGDINFO: /* get disk label */ 950 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 951 return 0; 952 #ifdef __HAVE_OLD_DISKLABEL 953 case ODIOCGDINFO: 954 newlabel = *(xy->sc_dk.dk_label); 955 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 956 return ENOTTY; 957 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 958 return 0; 959 #endif 960 961 case DIOCGPART: /* get partition info */ 962 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 963 ((struct partinfo *) addr)->part = 964 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 965 return 0; 966 967 case DIOCSDINFO: /* set disk label */ 968 #ifdef __HAVE_OLD_DISKLABEL 969 case ODIOCSDINFO: 970 if (command == ODIOCSDINFO) { 971 memset(&newlabel, 0, sizeof newlabel); 972 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 973 lp = &newlabel; 974 } else 975 #endif 976 lp = (struct disklabel *)addr; 977 978 if ((flag & FWRITE) == 0) 979 return EBADF; 980 error = setdisklabel(xy->sc_dk.dk_label, 981 lp, /* xy->sc_dk.dk_openmask : */ 0, 982 xy->sc_dk.dk_cpulabel); 983 if (error == 0) { 984 if (xy->state == XY_DRIVE_NOLABEL) 985 xy->state = XY_DRIVE_ONLINE; 986 } 987 return error; 988 989 case DIOCWLABEL: /* change write status of disk label */ 990 if ((flag & FWRITE) == 0) 991 return EBADF; 992 if (*(int *) addr) 993 xy->flags |= XY_WLABEL; 994 else 995 xy->flags &= ~XY_WLABEL; 996 return 0; 997 998 case DIOCWDINFO: /* write disk label */ 999 #ifdef __HAVE_OLD_DISKLABEL 1000 case ODIOCWDINFO: 1001 if (command == ODIOCWDINFO) { 1002 memset(&newlabel, 0, sizeof newlabel); 1003 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 1004 lp = &newlabel; 1005 } else 1006 #endif 1007 lp = (struct disklabel *)addr; 1008 1009 if ((flag & FWRITE) == 0) 1010 return EBADF; 1011 error = setdisklabel(xy->sc_dk.dk_label, 1012 lp, /* xy->sc_dk.dk_openmask : */ 0, 1013 xy->sc_dk.dk_cpulabel); 1014 if (error == 0) { 1015 if (xy->state == XY_DRIVE_NOLABEL) 1016 xy->state = XY_DRIVE_ONLINE; 1017 1018 /* Simulate opening partition 0 so write succeeds. */ 1019 xy->sc_dk.dk_openmask |= (1 << 0); 1020 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 1021 xystrategy, xy->sc_dk.dk_label, 1022 xy->sc_dk.dk_cpulabel); 1023 xy->sc_dk.dk_openmask = 1024 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1025 } 1026 return error; 1027 1028 case DIOSXDCMD: 1029 xio = (struct xd_iocmd *) addr; 1030 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1031 return (error); 1032 return (xyc_ioctlcmd(xy, dev, xio)); 1033 1034 default: 1035 return ENOTTY; 1036 } 1037 } 1038 1039 /* 1040 * xyopen: open drive 1041 */ 1042 1043 int 1044 xyopen(dev, flag, fmt, l) 1045 dev_t dev; 1046 int flag, fmt; 1047 struct lwp *l; 1048 { 1049 int unit, part; 1050 struct xy_softc *xy; 1051 struct xyc_attach_args xa; 1052 1053 /* first, could it be a valid target? */ 1054 1055 unit = DISKUNIT(dev); 1056 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 1057 return (ENXIO); 1058 part = DISKPART(dev); 1059 1060 /* do we need to attach the drive? */ 1061 1062 if (xy->state == XY_DRIVE_UNKNOWN) { 1063 xa.driveno = xy->xy_drive; 1064 xa.fullmode = XY_SUB_WAIT; 1065 xa.booting = 0; 1066 xyattach((struct device *) xy->parent, 1067 (struct device *) xy, &xa); 1068 if (xy->state == XY_DRIVE_UNKNOWN) { 1069 return (EIO); 1070 } 1071 } 1072 /* check for partition */ 1073 1074 if (part != RAW_PART && 1075 (part >= xy->sc_dk.dk_label->d_npartitions || 1076 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1077 return (ENXIO); 1078 } 1079 /* set open masks */ 1080 1081 switch (fmt) { 1082 case S_IFCHR: 1083 xy->sc_dk.dk_copenmask |= (1 << part); 1084 break; 1085 case S_IFBLK: 1086 xy->sc_dk.dk_bopenmask |= (1 << part); 1087 break; 1088 } 1089 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1090 1091 return 0; 1092 } 1093 1094 int 1095 xyread(dev, uio, flags) 1096 dev_t dev; 1097 struct uio *uio; 1098 int flags; 1099 { 1100 1101 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1102 } 1103 1104 int 1105 xywrite(dev, uio, flags) 1106 dev_t dev; 1107 struct uio *uio; 1108 int flags; 1109 { 1110 1111 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1112 } 1113 1114 1115 /* 1116 * xysize: return size of a partition for a dump 1117 */ 1118 1119 int 1120 xysize(dev) 1121 dev_t dev; 1122 1123 { 1124 struct xy_softc *xysc; 1125 int unit, part, size, omask; 1126 1127 /* valid unit? */ 1128 unit = DISKUNIT(dev); 1129 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1130 return (-1); 1131 1132 part = DISKPART(dev); 1133 omask = xysc->sc_dk.dk_openmask & (1 << part); 1134 1135 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1136 return (-1); 1137 1138 /* do it */ 1139 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1140 size = -1; /* only give valid size for swap partitions */ 1141 else 1142 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1143 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1144 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1145 return (-1); 1146 return (size); 1147 } 1148 1149 /* 1150 * xystrategy: buffering system interface to xy. 1151 */ 1152 1153 void 1154 xystrategy(bp) 1155 struct buf *bp; 1156 1157 { 1158 struct xy_softc *xy; 1159 int s, unit; 1160 struct xyc_attach_args xa; 1161 struct disklabel *lp; 1162 daddr_t blkno; 1163 1164 unit = DISKUNIT(bp->b_dev); 1165 1166 /* check for live device */ 1167 1168 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1169 bp->b_blkno < 0 || 1170 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1171 bp->b_error = EINVAL; 1172 goto bad; 1173 } 1174 /* do we need to attach the drive? */ 1175 1176 if (xy->state == XY_DRIVE_UNKNOWN) { 1177 xa.driveno = xy->xy_drive; 1178 xa.fullmode = XY_SUB_WAIT; 1179 xa.booting = 0; 1180 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1181 if (xy->state == XY_DRIVE_UNKNOWN) { 1182 bp->b_error = EIO; 1183 goto bad; 1184 } 1185 } 1186 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1187 /* no I/O to unlabeled disks, unless raw partition */ 1188 bp->b_error = EIO; 1189 goto bad; 1190 } 1191 /* short circuit zero length request */ 1192 1193 if (bp->b_bcount == 0) 1194 goto done; 1195 1196 /* check bounds with label (disksubr.c). Determine the size of the 1197 * transfer, and make sure it is within the boundaries of the 1198 * partition. Adjust transfer if needed, and signal errors or early 1199 * completion. */ 1200 1201 lp = xy->sc_dk.dk_label; 1202 1203 if (bounds_check_with_label(&xy->sc_dk, bp, 1204 (xy->flags & XY_WLABEL) != 0) <= 0) 1205 goto done; 1206 1207 /* 1208 * Now convert the block number to absolute and put it in 1209 * terms of the device's logical block size. 1210 */ 1211 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1212 if (DISKPART(bp->b_dev) != RAW_PART) 1213 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1214 1215 bp->b_rawblkno = blkno; 1216 1217 /* 1218 * now we know we have a valid buf structure that we need to do I/O 1219 * on. 1220 */ 1221 s = splbio(); /* protect the queues */ 1222 1223 BUFQ_PUT(&xy->xyq, bp); 1224 1225 /* start 'em up */ 1226 1227 xyc_start(xy->parent, NULL); 1228 1229 /* done! */ 1230 1231 splx(s); 1232 return; 1233 1234 bad: /* tells upper layers we have an error */ 1235 bp->b_flags |= B_ERROR; 1236 done: /* tells upper layers we are done with this 1237 * buf */ 1238 bp->b_resid = bp->b_bcount; 1239 biodone(bp); 1240 } 1241 /* 1242 * end of {b,c}devsw functions 1243 */ 1244 1245 /* 1246 * i n t e r r u p t f u n c t i o n 1247 * 1248 * xycintr: hardware interrupt. 1249 */ 1250 int 1251 xycintr(v) 1252 void *v; 1253 1254 { 1255 struct xyc_softc *xycsc = v; 1256 1257 /* kick the event counter */ 1258 1259 xycsc->sc_intrcnt.ev_count++; 1260 1261 /* remove as many done IOPBs as possible */ 1262 1263 xyc_remove_iorq(xycsc); 1264 1265 /* start any iorq's already waiting */ 1266 1267 xyc_start(xycsc, NULL); 1268 1269 return (1); 1270 } 1271 /* 1272 * end of interrupt function 1273 */ 1274 1275 /* 1276 * i n t e r n a l f u n c t i o n s 1277 */ 1278 1279 /* 1280 * xyc_rqinit: fill out the fields of an I/O request 1281 */ 1282 1283 inline void 1284 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1285 struct xy_iorq *rq; 1286 struct xyc_softc *xyc; 1287 struct xy_softc *xy; 1288 int md; 1289 u_long blk; 1290 int cnt; 1291 caddr_t db; 1292 struct buf *bp; 1293 { 1294 rq->xyc = xyc; 1295 rq->xy = xy; 1296 rq->ttl = XYC_MAXTTL + 10; 1297 rq->mode = md; 1298 rq->tries = rq->errno = rq->lasterror = 0; 1299 rq->blockno = blk; 1300 rq->sectcnt = cnt; 1301 rq->dbuf = db; 1302 rq->buf = bp; 1303 } 1304 1305 /* 1306 * xyc_rqtopb: load up an IOPB based on an iorq 1307 */ 1308 1309 void 1310 xyc_rqtopb(iorq, iopb, cmd, subfun) 1311 struct xy_iorq *iorq; 1312 struct xy_iopb *iopb; 1313 int cmd, subfun; 1314 1315 { 1316 u_long block, dp; 1317 1318 /* normal IOPB case, standard stuff */ 1319 1320 /* chain bit handled later */ 1321 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1322 iopb->com = cmd; 1323 iopb->errno = 0; 1324 iopb->errs = 0; 1325 iopb->done = 0; 1326 if (iorq->xy) { 1327 iopb->unit = iorq->xy->xy_drive; 1328 iopb->dt = iorq->xy->drive_type; 1329 } else { 1330 iopb->unit = 0; 1331 iopb->dt = 0; 1332 } 1333 block = iorq->blockno; 1334 if (iorq->xy == NULL || block == 0) { 1335 iopb->sect = iopb->head = iopb->cyl = 0; 1336 } else { 1337 iopb->sect = block % iorq->xy->nsect; 1338 block = block / iorq->xy->nsect; 1339 iopb->head = block % iorq->xy->nhead; 1340 block = block / iorq->xy->nhead; 1341 iopb->cyl = block; 1342 } 1343 iopb->scnt = iorq->sectcnt; 1344 dp = (u_long) iorq->dbuf; 1345 if (iorq->dbuf == NULL) { 1346 iopb->dataa = 0; 1347 iopb->datar = 0; 1348 } else { 1349 iopb->dataa = (dp & 0xffff); 1350 iopb->datar = ((dp & 0xff0000) >> 16); 1351 } 1352 iopb->subfn = subfun; 1353 } 1354 1355 1356 /* 1357 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1358 */ 1359 1360 int 1361 xyc_unbusy(xyc, del) 1362 1363 struct xyc *xyc; 1364 int del; 1365 1366 { 1367 while (del-- > 0) { 1368 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1369 break; 1370 DELAY(1); 1371 } 1372 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1373 } 1374 1375 /* 1376 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1377 * note that NORM requests are handled separately. 1378 */ 1379 int 1380 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1381 struct xyc_softc *xycsc; 1382 int cmd, subfn, unit, block, scnt; 1383 char *dptr; 1384 int fullmode; 1385 1386 { 1387 int submode = XY_STATE(fullmode); 1388 struct xy_iorq *iorq = xycsc->ciorq; 1389 struct xy_iopb *iopb = xycsc->ciopb; 1390 1391 /* 1392 * is someone else using the control iopq wait for it if we can 1393 */ 1394 start: 1395 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1396 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1397 return(XY_ERR_FAIL); 1398 goto start; 1399 } 1400 1401 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1402 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1403 iorq->mode = XY_SUB_FREE; 1404 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1405 } 1406 1407 /* init iorq/iopb */ 1408 1409 xyc_rqinit(iorq, xycsc, 1410 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1411 fullmode, block, scnt, dptr, NULL); 1412 1413 /* load IOPB from iorq */ 1414 1415 xyc_rqtopb(iorq, iopb, cmd, subfn); 1416 1417 /* submit it for processing */ 1418 1419 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1420 1421 return(XY_ERR_AOK); 1422 } 1423 1424 /* 1425 * xyc_startbuf 1426 * start a buffer for running 1427 */ 1428 1429 int 1430 xyc_startbuf(xycsc, xysc, bp) 1431 struct xyc_softc *xycsc; 1432 struct xy_softc *xysc; 1433 struct buf *bp; 1434 1435 { 1436 int partno, error; 1437 struct xy_iorq *iorq; 1438 struct xy_iopb *iopb; 1439 u_long block; 1440 1441 iorq = xysc->xyrq; 1442 iopb = iorq->iopb; 1443 1444 /* get buf */ 1445 1446 if (bp == NULL) 1447 panic("xyc_startbuf null buf"); 1448 1449 partno = DISKPART(bp->b_dev); 1450 #ifdef XYC_DEBUG 1451 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1452 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1453 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1454 bp->b_bcount, bp->b_data); 1455 #endif 1456 1457 /* 1458 * load request. 1459 * 1460 * note that iorq points to the buffer as mapped into DVMA space, 1461 * where as the bp->b_data points to its non-DVMA mapping. 1462 */ 1463 1464 block = bp->b_rawblkno; 1465 1466 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1467 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1468 if (error != 0) { 1469 printf("%s: warning: cannot load DMA map\n", 1470 xycsc->sc_dev.dv_xname); 1471 return (XY_ERR_FAIL); /* XXX: need some sort of 1472 * call-back scheme here? */ 1473 } 1474 1475 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1476 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1477 ? BUS_DMASYNC_PREREAD 1478 : BUS_DMASYNC_PREWRITE); 1479 1480 /* init iorq and load iopb from it */ 1481 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1482 bp->b_bcount / XYFM_BPS, 1483 (caddr_t)(u_long)iorq->dmamap->dm_segs[0].ds_addr, 1484 bp); 1485 1486 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1487 1488 /* Instrumentation. */ 1489 disk_busy(&xysc->sc_dk); 1490 1491 return (XY_ERR_AOK); 1492 } 1493 1494 1495 /* 1496 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1497 * if ok. if it fail returns an error code. type is XY_SUB_*. 1498 * 1499 * note: caller frees iorq in all cases except NORM 1500 * 1501 * return value: 1502 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1503 * WAIT: XY_AOK (success), <error-code> (failed) 1504 * POLL: <same as WAIT> 1505 * NOQ : <same as NORM> 1506 * 1507 * there are three sources for i/o requests: 1508 * [1] xystrategy: normal block I/O, using "struct buf" system. 1509 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1510 * [3] open/ioctl: these are I/O requests done in the context of a process, 1511 * and the process should block until they are done. 1512 * 1513 * software state is stored in the iorq structure. each iorq has an 1514 * iopb structure. the hardware understands the iopb structure. 1515 * every command must go through an iopb. a 450 handles one iopb at a 1516 * time, where as a 451 can take them in chains. [the 450 claims it 1517 * can handle chains, but is appears to be buggy...] iopb are allocated 1518 * in DVMA space at boot up time. each disk gets one iopb, and the 1519 * controller gets one (for POLL and WAIT commands). what happens if 1520 * the iopb is busy? for i/o type [1], the buffers are queued at the 1521 * "buff" layer and * picked up later by the interrupt routine. for case 1522 * [2] we can only be blocked if there is a WAIT type I/O request being 1523 * run. since this can only happen when we are crashing, we wait a sec 1524 * and then steal the IOPB. for case [3] the process can sleep 1525 * on the iorq free list until some iopbs are avaliable. 1526 */ 1527 1528 1529 int 1530 xyc_submit_iorq(xycsc, iorq, type) 1531 struct xyc_softc *xycsc; 1532 struct xy_iorq *iorq; 1533 int type; 1534 1535 { 1536 struct xy_iopb *dmaiopb; 1537 1538 #ifdef XYC_DEBUG 1539 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1540 xycsc->sc_dev.dv_xname, iorq, type); 1541 #endif 1542 1543 /* first check and see if controller is busy */ 1544 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1545 #ifdef XYC_DEBUG 1546 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1547 #endif 1548 if (type == XY_SUB_NOQ) 1549 return (XY_ERR_FAIL); /* failed */ 1550 switch (type) { 1551 case XY_SUB_NORM: 1552 return XY_ERR_AOK; /* success */ 1553 case XY_SUB_WAIT: 1554 while (iorq->iopb->done == 0) { 1555 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1556 } 1557 return (iorq->errno); 1558 case XY_SUB_POLL: /* steal controller */ 1559 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1560 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1561 panic("xyc_submit_iorq: stuck xyc"); 1562 printf("%s: stole controller\n", 1563 xycsc->sc_dev.dv_xname); 1564 break; 1565 default: 1566 panic("xyc_submit_iorq adding"); 1567 } 1568 } 1569 1570 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1571 if (dmaiopb == NULL) { /* nothing doing? */ 1572 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1573 return(XY_ERR_AOK); 1574 panic("xyc_submit_iorq: xyc_chain failed!"); 1575 } 1576 1577 XYC_GO(xycsc->xyc, (u_long)dmaiopb); 1578 1579 /* command now running, wrap it up */ 1580 switch (type) { 1581 case XY_SUB_NORM: 1582 case XY_SUB_NOQ: 1583 return (XY_ERR_AOK); /* success */ 1584 case XY_SUB_WAIT: 1585 while (iorq->iopb->done == 0) { 1586 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1587 } 1588 return (iorq->errno); 1589 case XY_SUB_POLL: 1590 return (xyc_piodriver(xycsc, iorq)); 1591 default: 1592 panic("xyc_submit_iorq wrap up"); 1593 } 1594 panic("xyc_submit_iorq"); 1595 return 0; /* not reached */ 1596 } 1597 1598 1599 /* 1600 * xyc_chain: build a chain. return dvma address of first element in 1601 * the chain. iorq != NULL: means we only want that item on the chain. 1602 */ 1603 1604 struct xy_iopb * 1605 xyc_chain(xycsc, iorq) 1606 struct xyc_softc *xycsc; 1607 struct xy_iorq *iorq; 1608 1609 { 1610 int togo, chain, hand; 1611 1612 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1613 1614 /* 1615 * promote control IOPB to the top 1616 */ 1617 if (iorq == NULL) { 1618 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1619 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1620 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1621 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1622 } 1623 1624 /* 1625 * special case: if iorq != NULL then we have a POLL or WAIT request. 1626 * we let these take priority and do them first. 1627 */ 1628 if (iorq) { 1629 xycsc->xy_chain[0] = iorq; 1630 iorq->iopb->chen = 0; 1631 return(iorq->dmaiopb); 1632 } 1633 1634 /* 1635 * NORM case: do round robin and maybe chain (if allowed and possible) 1636 */ 1637 chain = 0; 1638 hand = xycsc->xy_hand; 1639 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1640 1641 for (togo = XYC_MAXIOPB; togo > 0; 1642 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1643 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1644 1645 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1646 xycsc->iopbase[hand].done) 1647 continue; /* not ready-for-i/o */ 1648 1649 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1650 iopb = xycsc->xy_chain[chain]->iopb; 1651 iopb->chen = 0; 1652 if (chain != 0) { 1653 /* adding a link to a chain */ 1654 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1655 prev_iopb->chen = 1; 1656 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1657 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1658 } else { 1659 /* head of chain */ 1660 iorq = xycsc->xy_chain[chain]; 1661 } 1662 chain++; 1663 1664 /* quit if chaining dis-allowed */ 1665 if (xycsc->no_ols) 1666 break; 1667 } 1668 1669 return(iorq ? iorq->dmaiopb : NULL); 1670 } 1671 1672 /* 1673 * xyc_piodriver 1674 * 1675 * programmed i/o driver. this function takes over the computer 1676 * and drains off the polled i/o request. it returns the status of the iorq 1677 * the caller is interesting in. 1678 */ 1679 int 1680 xyc_piodriver(xycsc, iorq) 1681 struct xyc_softc *xycsc; 1682 struct xy_iorq *iorq; 1683 1684 { 1685 int nreset = 0; 1686 int retval = 0; 1687 u_long res; 1688 #ifdef XYC_DEBUG 1689 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1690 #endif 1691 1692 while (iorq->iopb->done == 0) { 1693 1694 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1695 1696 /* we expect some progress soon */ 1697 if (res == XY_ERR_FAIL && nreset >= 2) { 1698 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1699 #ifdef XYC_DEBUG 1700 printf("xyc_piodriver: timeout\n"); 1701 #endif 1702 return (XY_ERR_FAIL); 1703 } 1704 if (res == XY_ERR_FAIL) { 1705 if (xyc_reset(xycsc, 0, 1706 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1707 XY_ERR_FAIL, 1708 0) == XY_ERR_FAIL) 1709 return (XY_ERR_FAIL); /* flushes all but POLL 1710 * requests, resets */ 1711 continue; 1712 } 1713 1714 xyc_remove_iorq(xycsc); /* may resubmit request */ 1715 1716 if (iorq->iopb->done == 0) 1717 xyc_start(xycsc, iorq); 1718 } 1719 1720 /* get return value */ 1721 1722 retval = iorq->errno; 1723 1724 #ifdef XYC_DEBUG 1725 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1726 iorq->errno, xyc_e2str(iorq->errno)); 1727 #endif 1728 1729 /* start up any bufs that have queued */ 1730 1731 xyc_start(xycsc, NULL); 1732 1733 return (retval); 1734 } 1735 1736 /* 1737 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1738 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1739 */ 1740 void 1741 xyc_xyreset(xycsc, xysc) 1742 struct xyc_softc *xycsc; 1743 struct xy_softc *xysc; 1744 1745 { 1746 struct xy_iopb tmpiopb; 1747 struct xy_iopb *iopb; 1748 int del; 1749 1750 iopb = xycsc->ciopb; 1751 1752 /* Save contents */ 1753 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1754 1755 iopb->chen = iopb->done = iopb->errs = 0; 1756 iopb->ien = 0; 1757 iopb->com = XYCMD_RST; 1758 iopb->unit = xysc->xy_drive; 1759 1760 XYC_GO(xycsc->xyc, (u_long)xycsc->ciorq->dmaiopb); 1761 1762 del = XYC_RESETUSEC; 1763 while (del > 0) { 1764 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1765 break; 1766 DELAY(1); 1767 del--; 1768 } 1769 1770 if (del <= 0 || iopb->errs) { 1771 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1772 xyc_e2str(iopb->errno)); 1773 del = xycsc->xyc->xyc_rsetup; 1774 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1775 panic("xyc_reset"); 1776 } else { 1777 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1778 } 1779 1780 /* Restore contents */ 1781 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1782 } 1783 1784 1785 /* 1786 * xyc_reset: reset everything: requests are marked as errors except 1787 * a polled request (which is resubmitted) 1788 */ 1789 int 1790 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1791 struct xyc_softc *xycsc; 1792 int quiet, error; 1793 struct xy_iorq *blastmode; 1794 struct xy_softc *xysc; 1795 1796 { 1797 int del = 0, lcv, retval = XY_ERR_AOK; 1798 1799 /* soft reset hardware */ 1800 1801 if (!quiet) 1802 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1803 del = xycsc->xyc->xyc_rsetup; 1804 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1805 if (del == XY_ERR_FAIL) { 1806 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1807 retval = XY_ERR_FAIL; 1808 } 1809 if (xysc) 1810 xyc_xyreset(xycsc, xysc); 1811 1812 /* fix queues based on "blast-mode" */ 1813 1814 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1815 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1816 1817 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1818 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1819 XY_STATE(iorq->mode) != XY_SUB_NORM) 1820 /* is it active? */ 1821 continue; 1822 1823 if (blastmode == XY_RSET_ALL || 1824 blastmode != iorq) { 1825 /* failed */ 1826 iorq->errno = error; 1827 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1828 switch (XY_STATE(iorq->mode)) { 1829 case XY_SUB_NORM: 1830 iorq->buf->b_error = EIO; 1831 iorq->buf->b_flags |= B_ERROR; 1832 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1833 1834 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1835 iorq->dmamap->dm_mapsize, 1836 (iorq->buf->b_flags & B_READ) 1837 ? BUS_DMASYNC_POSTREAD 1838 : BUS_DMASYNC_POSTWRITE); 1839 1840 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1841 1842 (void)BUFQ_GET(&iorq->xy->xyq); 1843 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1844 (xycsc->reqs[lcv].buf->b_bcount - 1845 xycsc->reqs[lcv].buf->b_resid), 1846 (xycsc->reqs[lcv].buf->b_flags & B_READ)); 1847 biodone(iorq->buf); 1848 iorq->mode = XY_SUB_FREE; 1849 break; 1850 case XY_SUB_WAIT: 1851 wakeup(iorq); 1852 case XY_SUB_POLL: 1853 iorq->mode = 1854 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1855 break; 1856 } 1857 1858 } else { 1859 1860 /* resubmit, no need to do anything here */ 1861 } 1862 } 1863 1864 /* 1865 * now, if stuff is waiting, start it. 1866 * since we just reset it should go 1867 */ 1868 xyc_start(xycsc, NULL); 1869 1870 return (retval); 1871 } 1872 1873 /* 1874 * xyc_start: start waiting buffers 1875 */ 1876 1877 void 1878 xyc_start(xycsc, iorq) 1879 struct xyc_softc *xycsc; 1880 struct xy_iorq *iorq; 1881 1882 { 1883 int lcv; 1884 struct xy_softc *xy; 1885 1886 if (iorq == NULL) { 1887 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1888 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1889 if (BUFQ_PEEK(&xy->xyq) == NULL) continue; 1890 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1891 xyc_startbuf(xycsc, xy, BUFQ_PEEK(&xy->xyq)); 1892 } 1893 } 1894 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1895 } 1896 1897 /* 1898 * xyc_remove_iorq: remove "done" IOPB's. 1899 */ 1900 1901 int 1902 xyc_remove_iorq(xycsc) 1903 struct xyc_softc *xycsc; 1904 1905 { 1906 int errno, rq, comm, errs; 1907 struct xyc *xyc = xycsc->xyc; 1908 u_long addr; 1909 struct xy_iopb *iopb; 1910 struct xy_iorq *iorq; 1911 struct buf *bp; 1912 1913 if (xyc->xyc_csr & XYC_DERR) { 1914 /* 1915 * DOUBLE ERROR: should never happen under normal use. This 1916 * error is so bad, you can't even tell which IOPB is bad, so 1917 * we dump them all. 1918 */ 1919 errno = XY_ERR_DERR; 1920 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1921 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1922 printf("%s: soft reset failed!\n", 1923 xycsc->sc_dev.dv_xname); 1924 panic("xyc_remove_iorq: controller DEAD"); 1925 } 1926 return (XY_ERR_AOK); 1927 } 1928 1929 /* 1930 * get iopb that is done, loop down the chain 1931 */ 1932 1933 if (xyc->xyc_csr & XYC_ERR) { 1934 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1935 } 1936 if (xyc->xyc_csr & XYC_IPND) { 1937 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1938 } 1939 1940 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1941 iorq = xycsc->xy_chain[rq]; 1942 if (iorq == NULL) break; /* done ! */ 1943 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1944 continue; /* free, or done */ 1945 iopb = iorq->iopb; 1946 if (iopb->done == 0) 1947 continue; /* not done yet */ 1948 1949 comm = iopb->com; 1950 errs = iopb->errs; 1951 1952 if (errs) 1953 iorq->errno = iopb->errno; 1954 else 1955 iorq->errno = 0; 1956 1957 /* handle non-fatal errors */ 1958 1959 if (errs && 1960 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1961 continue; /* AOK: we resubmitted it */ 1962 1963 1964 /* this iorq is now done (hasn't been restarted or anything) */ 1965 1966 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1967 xyc_perror(iorq, iopb, 0); 1968 1969 /* now, if read/write check to make sure we got all the data 1970 * we needed. (this may not be the case if we got an error in 1971 * the middle of a multisector request). */ 1972 1973 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1974 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1975 /* we just successfully processed a bad144 sector 1976 * note: if we are in bad 144 mode, the pointers have 1977 * been advanced already (see above) and are pointing 1978 * at the bad144 sector. to exit bad144 mode, we 1979 * must advance the pointers 1 sector and issue a new 1980 * request if there are still sectors left to process 1981 * 1982 */ 1983 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1984 1985 /* exit b144 mode */ 1986 iorq->mode = iorq->mode & (~XY_MODE_B144); 1987 1988 if (iorq->sectcnt) { /* more to go! */ 1989 iorq->lasterror = iorq->errno = iopb->errno = 0; 1990 iopb->errs = iopb->done = 0; 1991 iorq->tries = 0; 1992 iopb->scnt = iorq->sectcnt; 1993 iopb->cyl = iorq->blockno / 1994 iorq->xy->sectpercyl; 1995 iopb->head = 1996 (iorq->blockno / iorq->xy->nhead) % 1997 iorq->xy->nhead; 1998 iopb->sect = iorq->blockno % XYFM_BPS; 1999 addr = (u_long) iorq->dbuf; 2000 iopb->dataa = (addr & 0xffff); 2001 iopb->datar = ((addr & 0xff0000) >> 16); 2002 /* will resubit at end */ 2003 continue; 2004 } 2005 } 2006 /* final cleanup, totally done with this request */ 2007 2008 switch (XY_STATE(iorq->mode)) { 2009 case XY_SUB_NORM: 2010 bp = iorq->buf; 2011 if (errs) { 2012 bp->b_error = EIO; 2013 bp->b_flags |= B_ERROR; 2014 bp->b_resid = iorq->sectcnt * XYFM_BPS; 2015 } else { 2016 bp->b_resid = 0; /* done */ 2017 } 2018 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 2019 iorq->dmamap->dm_mapsize, 2020 (iorq->buf->b_flags & B_READ) 2021 ? BUS_DMASYNC_POSTREAD 2022 : BUS_DMASYNC_POSTWRITE); 2023 2024 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 2025 2026 (void)BUFQ_GET(&iorq->xy->xyq); 2027 disk_unbusy(&iorq->xy->sc_dk, 2028 (bp->b_bcount - bp->b_resid), 2029 (bp->b_flags & B_READ)); 2030 iorq->mode = XY_SUB_FREE; 2031 biodone(bp); 2032 break; 2033 case XY_SUB_WAIT: 2034 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2035 wakeup(iorq); 2036 break; 2037 case XY_SUB_POLL: 2038 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2039 break; 2040 } 2041 } 2042 2043 return (XY_ERR_AOK); 2044 } 2045 2046 /* 2047 * xyc_perror: print error. 2048 * - if still_trying is true: we got an error, retried and got a 2049 * different error. in that case lasterror is the old error, 2050 * and errno is the new one. 2051 * - if still_trying is not true, then if we ever had an error it 2052 * is in lasterror. also, if iorq->errno == 0, then we recovered 2053 * from that error (otherwise iorq->errno == iorq->lasterror). 2054 */ 2055 void 2056 xyc_perror(iorq, iopb, still_trying) 2057 struct xy_iorq *iorq; 2058 struct xy_iopb *iopb; 2059 int still_trying; 2060 2061 { 2062 2063 int error = iorq->lasterror; 2064 2065 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 2066 : iorq->xyc->sc_dev.dv_xname); 2067 if (iorq->buf) 2068 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2069 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2070 printf("%s %d/%d/%d: ", 2071 (iopb->com == XYCMD_RD) ? "read" : "write", 2072 iopb->cyl, iopb->head, iopb->sect); 2073 printf("%s", xyc_e2str(error)); 2074 2075 if (still_trying) 2076 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 2077 else 2078 if (iorq->errno == 0) 2079 printf(" [recovered in %d tries]", iorq->tries); 2080 2081 printf("\n"); 2082 } 2083 2084 /* 2085 * xyc_error: non-fatal error encountered... recover. 2086 * return AOK if resubmitted, return FAIL if this iopb is done 2087 */ 2088 int 2089 xyc_error(xycsc, iorq, iopb, comm) 2090 struct xyc_softc *xycsc; 2091 struct xy_iorq *iorq; 2092 struct xy_iopb *iopb; 2093 int comm; 2094 2095 { 2096 int errno = iorq->errno; 2097 int erract = xyc_entoact(errno); 2098 int oldmode, advance; 2099 #ifdef __sparc__ 2100 int i; 2101 #endif 2102 2103 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2104 oldmode = iorq->mode; 2105 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2106 /* make xyc_start ignore us */ 2107 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 2108 iorq->mode = oldmode; 2109 } 2110 /* check for read/write to a sector in bad144 table if bad: redirect 2111 * request to bad144 area */ 2112 2113 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2114 (iorq->mode & XY_MODE_B144) == 0) { 2115 advance = iorq->sectcnt - iopb->scnt; 2116 XYC_ADVANCE(iorq, advance); 2117 #ifdef __sparc__ 2118 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2119 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2120 iorq->blockno % iorq->xy->nsect)) != -1) { 2121 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2122 * redirect */ 2123 iopb->errno = iopb->done = iopb->errs = 0; 2124 iopb->scnt = 1; 2125 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2126 /* second to last acyl */ 2127 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2128 * standard */ 2129 iopb->head = i / iorq->xy->nhead; 2130 iopb->sect = i % iorq->xy->nhead; 2131 /* will resubmit when we come out of remove_iorq */ 2132 return (XY_ERR_AOK); /* recovered! */ 2133 } 2134 #endif 2135 } 2136 2137 /* 2138 * it isn't a bad144 sector, must be real error! see if we can retry 2139 * it? 2140 */ 2141 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2142 xyc_perror(iorq, iopb, 1); /* inform of error state 2143 * change */ 2144 iorq->lasterror = errno; 2145 2146 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2147 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2148 iorq->tries++; 2149 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 2150 /* will resubmit at end of remove_iorq */ 2151 return (XY_ERR_AOK); /* recovered! */ 2152 } 2153 2154 /* failed to recover from this error */ 2155 return (XY_ERR_FAIL); 2156 } 2157 2158 /* 2159 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2160 */ 2161 void 2162 xyc_tick(arg) 2163 void *arg; 2164 2165 { 2166 struct xyc_softc *xycsc = arg; 2167 int lcv, s, reset = 0; 2168 2169 /* reduce ttl for each request if one goes to zero, reset xyc */ 2170 s = splbio(); 2171 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2172 if (xycsc->reqs[lcv].mode == 0 || 2173 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2174 continue; 2175 xycsc->reqs[lcv].ttl--; 2176 if (xycsc->reqs[lcv].ttl == 0) 2177 reset = 1; 2178 } 2179 if (reset) { 2180 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2181 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2182 } 2183 splx(s); 2184 2185 /* until next time */ 2186 2187 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2188 } 2189 2190 /* 2191 * xyc_ioctlcmd: this function provides a user level interface to the 2192 * controller via ioctl. this allows "format" programs to be written 2193 * in user code, and is also useful for some debugging. we return 2194 * an error code. called at user priority. 2195 * 2196 * XXX missing a few commands (see the 7053 driver for ideas) 2197 */ 2198 int 2199 xyc_ioctlcmd(xy, dev, xio) 2200 struct xy_softc *xy; 2201 dev_t dev; 2202 struct xd_iocmd *xio; 2203 2204 { 2205 int s, rqno, dummy = 0; 2206 caddr_t dvmabuf = NULL, buf = NULL; 2207 struct xyc_softc *xycsc; 2208 int rseg, error; 2209 bus_dma_segment_t seg; 2210 2211 /* check sanity of requested command */ 2212 2213 switch (xio->cmd) { 2214 2215 case XYCMD_NOP: /* no op: everything should be zero */ 2216 if (xio->subfn || xio->dptr || xio->dlen || 2217 xio->block || xio->sectcnt) 2218 return (EINVAL); 2219 break; 2220 2221 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2222 case XYCMD_WR: 2223 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2224 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2225 return (EINVAL); 2226 break; 2227 2228 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2229 return (EINVAL); 2230 2231 break; 2232 2233 default: 2234 return (EINVAL);/* ??? */ 2235 } 2236 2237 xycsc = xy->parent; 2238 2239 /* create DVMA buffer for request if needed */ 2240 if (xio->dlen) { 2241 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2242 &seg, &rseg, 2243 xio->dlen, &buf, 2244 (bus_addr_t *)&dvmabuf)) != 0) { 2245 return (error); 2246 } 2247 2248 if (xio->cmd == XYCMD_WR) { 2249 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2250 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2251 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2252 return (error); 2253 } 2254 } 2255 } 2256 /* do it! */ 2257 2258 error = 0; 2259 s = splbio(); 2260 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2261 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2262 if (rqno == XY_ERR_FAIL) { 2263 error = EIO; 2264 goto done; 2265 } 2266 xio->errno = xycsc->ciorq->errno; 2267 xio->tries = xycsc->ciorq->tries; 2268 XYC_DONE(xycsc, dummy); 2269 2270 if (xio->cmd == XYCMD_RD) 2271 error = copyout(buf, xio->dptr, xio->dlen); 2272 2273 done: 2274 splx(s); 2275 if (dvmabuf) { 2276 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2277 xio->dlen, buf); 2278 } 2279 return (error); 2280 } 2281 2282 /* 2283 * xyc_e2str: convert error code number into an error string 2284 */ 2285 char * 2286 xyc_e2str(no) 2287 int no; 2288 { 2289 switch (no) { 2290 case XY_ERR_FAIL: 2291 return ("Software fatal error"); 2292 case XY_ERR_DERR: 2293 return ("DOUBLE ERROR"); 2294 case XY_ERR_AOK: 2295 return ("Successful completion"); 2296 case XY_ERR_IPEN: 2297 return("Interrupt pending"); 2298 case XY_ERR_BCFL: 2299 return("Busy conflict"); 2300 case XY_ERR_TIMO: 2301 return("Operation timeout"); 2302 case XY_ERR_NHDR: 2303 return("Header not found"); 2304 case XY_ERR_HARD: 2305 return("Hard ECC error"); 2306 case XY_ERR_ICYL: 2307 return("Illegal cylinder address"); 2308 case XY_ERR_ISEC: 2309 return("Illegal sector address"); 2310 case XY_ERR_SMAL: 2311 return("Last sector too small"); 2312 case XY_ERR_SACK: 2313 return("Slave ACK error (non-existent memory)"); 2314 case XY_ERR_CHER: 2315 return("Cylinder and head/header error"); 2316 case XY_ERR_SRTR: 2317 return("Auto-seek retry successful"); 2318 case XY_ERR_WPRO: 2319 return("Write-protect error"); 2320 case XY_ERR_UIMP: 2321 return("Unimplemented command"); 2322 case XY_ERR_DNRY: 2323 return("Drive not ready"); 2324 case XY_ERR_SZER: 2325 return("Sector count zero"); 2326 case XY_ERR_DFLT: 2327 return("Drive faulted"); 2328 case XY_ERR_ISSZ: 2329 return("Illegal sector size"); 2330 case XY_ERR_SLTA: 2331 return("Self test A"); 2332 case XY_ERR_SLTB: 2333 return("Self test B"); 2334 case XY_ERR_SLTC: 2335 return("Self test C"); 2336 case XY_ERR_SOFT: 2337 return("Soft ECC error"); 2338 case XY_ERR_SFOK: 2339 return("Soft ECC error recovered"); 2340 case XY_ERR_IHED: 2341 return("Illegal head"); 2342 case XY_ERR_DSEQ: 2343 return("Disk sequencer error"); 2344 case XY_ERR_SEEK: 2345 return("Seek error"); 2346 default: 2347 return ("Unknown error"); 2348 } 2349 } 2350 2351 int 2352 xyc_entoact(errno) 2353 2354 int errno; 2355 2356 { 2357 switch (errno) { 2358 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2359 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2360 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2361 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2362 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2363 2364 return(XY_ERA_PROG); /* program error ! */ 2365 2366 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2367 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2368 case XY_ERR_SOFT: 2369 2370 return(XY_ERA_HARD); /* hard error, retry */ 2371 2372 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2373 2374 return(XY_ERA_RSET); /* hard error reset */ 2375 2376 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2377 2378 return(XY_ERA_SOFT); /* an FYI error */ 2379 2380 case XY_ERR_WPRO: 2381 2382 return(XY_ERA_WPRO); /* write protect */ 2383 } 2384 2385 return(XY_ERA_PROG); /* ??? */ 2386 } 2387
Indexes created Tue Sep 30 20:09:53 GMT 2025