xy.c revision 1.51
1 /* $NetBSD: xy.c,v 1.51 2003/06/29 22:31:01 fvdl 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 1.51 2003/06/29 22:31:01 fvdl 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, p) 850 dev_t dev; 851 int flag, fmt; 852 struct proc *p; 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, p) 917 dev_t dev; 918 u_long command; 919 caddr_t addr; 920 int flag; 921 struct proc *p; 922 923 { 924 struct xy_softc *xy; 925 struct xd_iocmd *xio; 926 int error, s, unit; 927 #ifdef __HAVE_OLD_DISKLABEL 928 struct disklabel newlabel; 929 #endif 930 struct disklabel *lp; 931 932 unit = DISKUNIT(dev); 933 934 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 935 return (ENXIO); 936 937 /* switch on ioctl type */ 938 939 switch (command) { 940 case DIOCSBAD: /* set bad144 info */ 941 if ((flag & FWRITE) == 0) 942 return EBADF; 943 s = splbio(); 944 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 945 splx(s); 946 return 0; 947 948 case DIOCGDINFO: /* get disk label */ 949 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 950 return 0; 951 #ifdef __HAVE_OLD_DISKLABEL 952 case ODIOCGDINFO: 953 newlabel = *(xy->sc_dk.dk_label); 954 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 955 return ENOTTY; 956 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 957 return 0; 958 #endif 959 960 case DIOCGPART: /* get partition info */ 961 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 962 ((struct partinfo *) addr)->part = 963 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 964 return 0; 965 966 case DIOCSDINFO: /* set disk label */ 967 #ifdef __HAVE_OLD_DISKLABEL 968 case ODIOCSDINFO: 969 if (command == ODIOCSDINFO) { 970 memset(&newlabel, 0, sizeof newlabel); 971 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 972 lp = &newlabel; 973 } else 974 #endif 975 lp = (struct disklabel *)addr; 976 977 if ((flag & FWRITE) == 0) 978 return EBADF; 979 error = setdisklabel(xy->sc_dk.dk_label, 980 lp, /* xy->sc_dk.dk_openmask : */ 0, 981 xy->sc_dk.dk_cpulabel); 982 if (error == 0) { 983 if (xy->state == XY_DRIVE_NOLABEL) 984 xy->state = XY_DRIVE_ONLINE; 985 } 986 return error; 987 988 case DIOCWLABEL: /* change write status of disk label */ 989 if ((flag & FWRITE) == 0) 990 return EBADF; 991 if (*(int *) addr) 992 xy->flags |= XY_WLABEL; 993 else 994 xy->flags &= ~XY_WLABEL; 995 return 0; 996 997 case DIOCWDINFO: /* write disk label */ 998 #ifdef __HAVE_OLD_DISKLABEL 999 case ODIOCWDINFO: 1000 if (command == ODIOCWDINFO) { 1001 memset(&newlabel, 0, sizeof newlabel); 1002 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 1003 lp = &newlabel; 1004 } else 1005 #endif 1006 lp = (struct disklabel *)addr; 1007 1008 if ((flag & FWRITE) == 0) 1009 return EBADF; 1010 error = setdisklabel(xy->sc_dk.dk_label, 1011 lp, /* xy->sc_dk.dk_openmask : */ 0, 1012 xy->sc_dk.dk_cpulabel); 1013 if (error == 0) { 1014 if (xy->state == XY_DRIVE_NOLABEL) 1015 xy->state = XY_DRIVE_ONLINE; 1016 1017 /* Simulate opening partition 0 so write succeeds. */ 1018 xy->sc_dk.dk_openmask |= (1 << 0); 1019 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 1020 xystrategy, xy->sc_dk.dk_label, 1021 xy->sc_dk.dk_cpulabel); 1022 xy->sc_dk.dk_openmask = 1023 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1024 } 1025 return error; 1026 1027 case DIOSXDCMD: 1028 xio = (struct xd_iocmd *) addr; 1029 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1030 return (error); 1031 return (xyc_ioctlcmd(xy, dev, xio)); 1032 1033 default: 1034 return ENOTTY; 1035 } 1036 } 1037 1038 /* 1039 * xyopen: open drive 1040 */ 1041 1042 int 1043 xyopen(dev, flag, fmt, p) 1044 dev_t dev; 1045 int flag, fmt; 1046 struct proc *p; 1047 { 1048 int unit, part; 1049 struct xy_softc *xy; 1050 struct xyc_attach_args xa; 1051 1052 /* first, could it be a valid target? */ 1053 1054 unit = DISKUNIT(dev); 1055 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 1056 return (ENXIO); 1057 part = DISKPART(dev); 1058 1059 /* do we need to attach the drive? */ 1060 1061 if (xy->state == XY_DRIVE_UNKNOWN) { 1062 xa.driveno = xy->xy_drive; 1063 xa.fullmode = XY_SUB_WAIT; 1064 xa.booting = 0; 1065 xyattach((struct device *) xy->parent, 1066 (struct device *) xy, &xa); 1067 if (xy->state == XY_DRIVE_UNKNOWN) { 1068 return (EIO); 1069 } 1070 } 1071 /* check for partition */ 1072 1073 if (part != RAW_PART && 1074 (part >= xy->sc_dk.dk_label->d_npartitions || 1075 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1076 return (ENXIO); 1077 } 1078 /* set open masks */ 1079 1080 switch (fmt) { 1081 case S_IFCHR: 1082 xy->sc_dk.dk_copenmask |= (1 << part); 1083 break; 1084 case S_IFBLK: 1085 xy->sc_dk.dk_bopenmask |= (1 << part); 1086 break; 1087 } 1088 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1089 1090 return 0; 1091 } 1092 1093 int 1094 xyread(dev, uio, flags) 1095 dev_t dev; 1096 struct uio *uio; 1097 int flags; 1098 { 1099 1100 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1101 } 1102 1103 int 1104 xywrite(dev, uio, flags) 1105 dev_t dev; 1106 struct uio *uio; 1107 int flags; 1108 { 1109 1110 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1111 } 1112 1113 1114 /* 1115 * xysize: return size of a partition for a dump 1116 */ 1117 1118 int 1119 xysize(dev) 1120 dev_t dev; 1121 1122 { 1123 struct xy_softc *xysc; 1124 int unit, part, size, omask; 1125 1126 /* valid unit? */ 1127 unit = DISKUNIT(dev); 1128 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1129 return (-1); 1130 1131 part = DISKPART(dev); 1132 omask = xysc->sc_dk.dk_openmask & (1 << part); 1133 1134 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1135 return (-1); 1136 1137 /* do it */ 1138 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1139 size = -1; /* only give valid size for swap partitions */ 1140 else 1141 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1142 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1143 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1144 return (-1); 1145 return (size); 1146 } 1147 1148 /* 1149 * xystrategy: buffering system interface to xy. 1150 */ 1151 1152 void 1153 xystrategy(bp) 1154 struct buf *bp; 1155 1156 { 1157 struct xy_softc *xy; 1158 int s, unit; 1159 struct xyc_attach_args xa; 1160 struct disklabel *lp; 1161 daddr_t blkno; 1162 1163 unit = DISKUNIT(bp->b_dev); 1164 1165 /* check for live device */ 1166 1167 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1168 bp->b_blkno < 0 || 1169 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1170 bp->b_error = EINVAL; 1171 goto bad; 1172 } 1173 /* do we need to attach the drive? */ 1174 1175 if (xy->state == XY_DRIVE_UNKNOWN) { 1176 xa.driveno = xy->xy_drive; 1177 xa.fullmode = XY_SUB_WAIT; 1178 xa.booting = 0; 1179 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1180 if (xy->state == XY_DRIVE_UNKNOWN) { 1181 bp->b_error = EIO; 1182 goto bad; 1183 } 1184 } 1185 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1186 /* no I/O to unlabeled disks, unless raw partition */ 1187 bp->b_error = EIO; 1188 goto bad; 1189 } 1190 /* short circuit zero length request */ 1191 1192 if (bp->b_bcount == 0) 1193 goto done; 1194 1195 /* check bounds with label (disksubr.c). Determine the size of the 1196 * transfer, and make sure it is within the boundaries of the 1197 * partition. Adjust transfer if needed, and signal errors or early 1198 * completion. */ 1199 1200 lp = xy->sc_dk.dk_label; 1201 1202 if (bounds_check_with_label(&xy->sc_dk, bp, 1203 (xy->flags & XY_WLABEL) != 0) <= 0) 1204 goto done; 1205 1206 /* 1207 * Now convert the block number to absolute and put it in 1208 * terms of the device's logical block size. 1209 */ 1210 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1211 if (DISKPART(bp->b_dev) != RAW_PART) 1212 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1213 1214 bp->b_rawblkno = blkno; 1215 1216 /* 1217 * now we know we have a valid buf structure that we need to do I/O 1218 * on. 1219 */ 1220 s = splbio(); /* protect the queues */ 1221 1222 BUFQ_PUT(&xy->xyq, bp); 1223 1224 /* start 'em up */ 1225 1226 xyc_start(xy->parent, NULL); 1227 1228 /* done! */ 1229 1230 splx(s); 1231 return; 1232 1233 bad: /* tells upper layers we have an error */ 1234 bp->b_flags |= B_ERROR; 1235 done: /* tells upper layers we are done with this 1236 * buf */ 1237 bp->b_resid = bp->b_bcount; 1238 biodone(bp); 1239 } 1240 /* 1241 * end of {b,c}devsw functions 1242 */ 1243 1244 /* 1245 * i n t e r r u p t f u n c t i o n 1246 * 1247 * xycintr: hardware interrupt. 1248 */ 1249 int 1250 xycintr(v) 1251 void *v; 1252 1253 { 1254 struct xyc_softc *xycsc = v; 1255 1256 /* kick the event counter */ 1257 1258 xycsc->sc_intrcnt.ev_count++; 1259 1260 /* remove as many done IOPBs as possible */ 1261 1262 xyc_remove_iorq(xycsc); 1263 1264 /* start any iorq's already waiting */ 1265 1266 xyc_start(xycsc, NULL); 1267 1268 return (1); 1269 } 1270 /* 1271 * end of interrupt function 1272 */ 1273 1274 /* 1275 * i n t e r n a l f u n c t i o n s 1276 */ 1277 1278 /* 1279 * xyc_rqinit: fill out the fields of an I/O request 1280 */ 1281 1282 inline void 1283 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1284 struct xy_iorq *rq; 1285 struct xyc_softc *xyc; 1286 struct xy_softc *xy; 1287 int md; 1288 u_long blk; 1289 int cnt; 1290 caddr_t db; 1291 struct buf *bp; 1292 { 1293 rq->xyc = xyc; 1294 rq->xy = xy; 1295 rq->ttl = XYC_MAXTTL + 10; 1296 rq->mode = md; 1297 rq->tries = rq->errno = rq->lasterror = 0; 1298 rq->blockno = blk; 1299 rq->sectcnt = cnt; 1300 rq->dbuf = db; 1301 rq->buf = bp; 1302 } 1303 1304 /* 1305 * xyc_rqtopb: load up an IOPB based on an iorq 1306 */ 1307 1308 void 1309 xyc_rqtopb(iorq, iopb, cmd, subfun) 1310 struct xy_iorq *iorq; 1311 struct xy_iopb *iopb; 1312 int cmd, subfun; 1313 1314 { 1315 u_long block, dp; 1316 1317 /* normal IOPB case, standard stuff */ 1318 1319 /* chain bit handled later */ 1320 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1321 iopb->com = cmd; 1322 iopb->errno = 0; 1323 iopb->errs = 0; 1324 iopb->done = 0; 1325 if (iorq->xy) { 1326 iopb->unit = iorq->xy->xy_drive; 1327 iopb->dt = iorq->xy->drive_type; 1328 } else { 1329 iopb->unit = 0; 1330 iopb->dt = 0; 1331 } 1332 block = iorq->blockno; 1333 if (iorq->xy == NULL || block == 0) { 1334 iopb->sect = iopb->head = iopb->cyl = 0; 1335 } else { 1336 iopb->sect = block % iorq->xy->nsect; 1337 block = block / iorq->xy->nsect; 1338 iopb->head = block % iorq->xy->nhead; 1339 block = block / iorq->xy->nhead; 1340 iopb->cyl = block; 1341 } 1342 iopb->scnt = iorq->sectcnt; 1343 dp = (u_long) iorq->dbuf; 1344 if (iorq->dbuf == NULL) { 1345 iopb->dataa = 0; 1346 iopb->datar = 0; 1347 } else { 1348 iopb->dataa = (dp & 0xffff); 1349 iopb->datar = ((dp & 0xff0000) >> 16); 1350 } 1351 iopb->subfn = subfun; 1352 } 1353 1354 1355 /* 1356 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1357 */ 1358 1359 int 1360 xyc_unbusy(xyc, del) 1361 1362 struct xyc *xyc; 1363 int del; 1364 1365 { 1366 while (del-- > 0) { 1367 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1368 break; 1369 DELAY(1); 1370 } 1371 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1372 } 1373 1374 /* 1375 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1376 * note that NORM requests are handled separately. 1377 */ 1378 int 1379 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1380 struct xyc_softc *xycsc; 1381 int cmd, subfn, unit, block, scnt; 1382 char *dptr; 1383 int fullmode; 1384 1385 { 1386 int submode = XY_STATE(fullmode); 1387 struct xy_iorq *iorq = xycsc->ciorq; 1388 struct xy_iopb *iopb = xycsc->ciopb; 1389 1390 /* 1391 * is someone else using the control iopq wait for it if we can 1392 */ 1393 start: 1394 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1395 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1396 return(XY_ERR_FAIL); 1397 goto start; 1398 } 1399 1400 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1401 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1402 iorq->mode = XY_SUB_FREE; 1403 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1404 } 1405 1406 /* init iorq/iopb */ 1407 1408 xyc_rqinit(iorq, xycsc, 1409 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1410 fullmode, block, scnt, dptr, NULL); 1411 1412 /* load IOPB from iorq */ 1413 1414 xyc_rqtopb(iorq, iopb, cmd, subfn); 1415 1416 /* submit it for processing */ 1417 1418 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1419 1420 return(XY_ERR_AOK); 1421 } 1422 1423 /* 1424 * xyc_startbuf 1425 * start a buffer for running 1426 */ 1427 1428 int 1429 xyc_startbuf(xycsc, xysc, bp) 1430 struct xyc_softc *xycsc; 1431 struct xy_softc *xysc; 1432 struct buf *bp; 1433 1434 { 1435 int partno, error; 1436 struct xy_iorq *iorq; 1437 struct xy_iopb *iopb; 1438 u_long block; 1439 1440 iorq = xysc->xyrq; 1441 iopb = iorq->iopb; 1442 1443 /* get buf */ 1444 1445 if (bp == NULL) 1446 panic("xyc_startbuf null buf"); 1447 1448 partno = DISKPART(bp->b_dev); 1449 #ifdef XYC_DEBUG 1450 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1451 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1452 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1453 bp->b_bcount, bp->b_data); 1454 #endif 1455 1456 /* 1457 * load request. 1458 * 1459 * note that iorq points to the buffer as mapped into DVMA space, 1460 * where as the bp->b_data points to its non-DVMA mapping. 1461 */ 1462 1463 block = bp->b_rawblkno; 1464 1465 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1466 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1467 if (error != 0) { 1468 printf("%s: warning: cannot load DMA map\n", 1469 xycsc->sc_dev.dv_xname); 1470 return (XY_ERR_FAIL); /* XXX: need some sort of 1471 * call-back scheme here? */ 1472 } 1473 1474 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1475 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1476 ? BUS_DMASYNC_PREREAD 1477 : BUS_DMASYNC_PREWRITE); 1478 1479 /* init iorq and load iopb from it */ 1480 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1481 bp->b_bcount / XYFM_BPS, 1482 (caddr_t)(u_long)iorq->dmamap->dm_segs[0].ds_addr, 1483 bp); 1484 1485 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1486 1487 /* Instrumentation. */ 1488 disk_busy(&xysc->sc_dk); 1489 1490 return (XY_ERR_AOK); 1491 } 1492 1493 1494 /* 1495 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1496 * if ok. if it fail returns an error code. type is XY_SUB_*. 1497 * 1498 * note: caller frees iorq in all cases except NORM 1499 * 1500 * return value: 1501 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1502 * WAIT: XY_AOK (success), <error-code> (failed) 1503 * POLL: <same as WAIT> 1504 * NOQ : <same as NORM> 1505 * 1506 * there are three sources for i/o requests: 1507 * [1] xystrategy: normal block I/O, using "struct buf" system. 1508 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1509 * [3] open/ioctl: these are I/O requests done in the context of a process, 1510 * and the process should block until they are done. 1511 * 1512 * software state is stored in the iorq structure. each iorq has an 1513 * iopb structure. the hardware understands the iopb structure. 1514 * every command must go through an iopb. a 450 handles one iopb at a 1515 * time, where as a 451 can take them in chains. [the 450 claims it 1516 * can handle chains, but is appears to be buggy...] iopb are allocated 1517 * in DVMA space at boot up time. each disk gets one iopb, and the 1518 * controller gets one (for POLL and WAIT commands). what happens if 1519 * the iopb is busy? for i/o type [1], the buffers are queued at the 1520 * "buff" layer and * picked up later by the interrupt routine. for case 1521 * [2] we can only be blocked if there is a WAIT type I/O request being 1522 * run. since this can only happen when we are crashing, we wait a sec 1523 * and then steal the IOPB. for case [3] the process can sleep 1524 * on the iorq free list until some iopbs are avaliable. 1525 */ 1526 1527 1528 int 1529 xyc_submit_iorq(xycsc, iorq, type) 1530 struct xyc_softc *xycsc; 1531 struct xy_iorq *iorq; 1532 int type; 1533 1534 { 1535 struct xy_iopb *dmaiopb; 1536 1537 #ifdef XYC_DEBUG 1538 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1539 xycsc->sc_dev.dv_xname, iorq, type); 1540 #endif 1541 1542 /* first check and see if controller is busy */ 1543 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1544 #ifdef XYC_DEBUG 1545 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1546 #endif 1547 if (type == XY_SUB_NOQ) 1548 return (XY_ERR_FAIL); /* failed */ 1549 switch (type) { 1550 case XY_SUB_NORM: 1551 return XY_ERR_AOK; /* success */ 1552 case XY_SUB_WAIT: 1553 while (iorq->iopb->done == 0) { 1554 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1555 } 1556 return (iorq->errno); 1557 case XY_SUB_POLL: /* steal controller */ 1558 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1559 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1560 panic("xyc_submit_iorq: stuck xyc"); 1561 printf("%s: stole controller\n", 1562 xycsc->sc_dev.dv_xname); 1563 break; 1564 default: 1565 panic("xyc_submit_iorq adding"); 1566 } 1567 } 1568 1569 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1570 if (dmaiopb == NULL) { /* nothing doing? */ 1571 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1572 return(XY_ERR_AOK); 1573 panic("xyc_submit_iorq: xyc_chain failed!"); 1574 } 1575 1576 XYC_GO(xycsc->xyc, (u_long)dmaiopb); 1577 1578 /* command now running, wrap it up */ 1579 switch (type) { 1580 case XY_SUB_NORM: 1581 case XY_SUB_NOQ: 1582 return (XY_ERR_AOK); /* success */ 1583 case XY_SUB_WAIT: 1584 while (iorq->iopb->done == 0) { 1585 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1586 } 1587 return (iorq->errno); 1588 case XY_SUB_POLL: 1589 return (xyc_piodriver(xycsc, iorq)); 1590 default: 1591 panic("xyc_submit_iorq wrap up"); 1592 } 1593 panic("xyc_submit_iorq"); 1594 return 0; /* not reached */ 1595 } 1596 1597 1598 /* 1599 * xyc_chain: build a chain. return dvma address of first element in 1600 * the chain. iorq != NULL: means we only want that item on the chain. 1601 */ 1602 1603 struct xy_iopb * 1604 xyc_chain(xycsc, iorq) 1605 struct xyc_softc *xycsc; 1606 struct xy_iorq *iorq; 1607 1608 { 1609 int togo, chain, hand; 1610 1611 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1612 1613 /* 1614 * promote control IOPB to the top 1615 */ 1616 if (iorq == NULL) { 1617 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1618 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1619 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1620 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1621 } 1622 1623 /* 1624 * special case: if iorq != NULL then we have a POLL or WAIT request. 1625 * we let these take priority and do them first. 1626 */ 1627 if (iorq) { 1628 xycsc->xy_chain[0] = iorq; 1629 iorq->iopb->chen = 0; 1630 return(iorq->dmaiopb); 1631 } 1632 1633 /* 1634 * NORM case: do round robin and maybe chain (if allowed and possible) 1635 */ 1636 chain = 0; 1637 hand = xycsc->xy_hand; 1638 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1639 1640 for (togo = XYC_MAXIOPB; togo > 0; 1641 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1642 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1643 1644 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1645 xycsc->iopbase[hand].done) 1646 continue; /* not ready-for-i/o */ 1647 1648 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1649 iopb = xycsc->xy_chain[chain]->iopb; 1650 iopb->chen = 0; 1651 if (chain != 0) { 1652 /* adding a link to a chain */ 1653 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1654 prev_iopb->chen = 1; 1655 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1656 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1657 } else { 1658 /* head of chain */ 1659 iorq = xycsc->xy_chain[chain]; 1660 } 1661 chain++; 1662 1663 /* quit if chaining dis-allowed */ 1664 if (xycsc->no_ols) 1665 break; 1666 } 1667 1668 return(iorq ? iorq->dmaiopb : NULL); 1669 } 1670 1671 /* 1672 * xyc_piodriver 1673 * 1674 * programmed i/o driver. this function takes over the computer 1675 * and drains off the polled i/o request. it returns the status of the iorq 1676 * the caller is interesting in. 1677 */ 1678 int 1679 xyc_piodriver(xycsc, iorq) 1680 struct xyc_softc *xycsc; 1681 struct xy_iorq *iorq; 1682 1683 { 1684 int nreset = 0; 1685 int retval = 0; 1686 u_long res; 1687 #ifdef XYC_DEBUG 1688 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1689 #endif 1690 1691 while (iorq->iopb->done == 0) { 1692 1693 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1694 1695 /* we expect some progress soon */ 1696 if (res == XY_ERR_FAIL && nreset >= 2) { 1697 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1698 #ifdef XYC_DEBUG 1699 printf("xyc_piodriver: timeout\n"); 1700 #endif 1701 return (XY_ERR_FAIL); 1702 } 1703 if (res == XY_ERR_FAIL) { 1704 if (xyc_reset(xycsc, 0, 1705 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1706 XY_ERR_FAIL, 1707 0) == XY_ERR_FAIL) 1708 return (XY_ERR_FAIL); /* flushes all but POLL 1709 * requests, resets */ 1710 continue; 1711 } 1712 1713 xyc_remove_iorq(xycsc); /* may resubmit request */ 1714 1715 if (iorq->iopb->done == 0) 1716 xyc_start(xycsc, iorq); 1717 } 1718 1719 /* get return value */ 1720 1721 retval = iorq->errno; 1722 1723 #ifdef XYC_DEBUG 1724 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1725 iorq->errno, xyc_e2str(iorq->errno)); 1726 #endif 1727 1728 /* start up any bufs that have queued */ 1729 1730 xyc_start(xycsc, NULL); 1731 1732 return (retval); 1733 } 1734 1735 /* 1736 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1737 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1738 */ 1739 void 1740 xyc_xyreset(xycsc, xysc) 1741 struct xyc_softc *xycsc; 1742 struct xy_softc *xysc; 1743 1744 { 1745 struct xy_iopb tmpiopb; 1746 struct xy_iopb *iopb; 1747 int del; 1748 1749 iopb = xycsc->ciopb; 1750 1751 /* Save contents */ 1752 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1753 1754 iopb->chen = iopb->done = iopb->errs = 0; 1755 iopb->ien = 0; 1756 iopb->com = XYCMD_RST; 1757 iopb->unit = xysc->xy_drive; 1758 1759 XYC_GO(xycsc->xyc, (u_long)xycsc->ciorq->dmaiopb); 1760 1761 del = XYC_RESETUSEC; 1762 while (del > 0) { 1763 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1764 break; 1765 DELAY(1); 1766 del--; 1767 } 1768 1769 if (del <= 0 || iopb->errs) { 1770 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1771 xyc_e2str(iopb->errno)); 1772 del = xycsc->xyc->xyc_rsetup; 1773 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1774 panic("xyc_reset"); 1775 } else { 1776 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1777 } 1778 1779 /* Restore contents */ 1780 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1781 } 1782 1783 1784 /* 1785 * xyc_reset: reset everything: requests are marked as errors except 1786 * a polled request (which is resubmitted) 1787 */ 1788 int 1789 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1790 struct xyc_softc *xycsc; 1791 int quiet, error; 1792 struct xy_iorq *blastmode; 1793 struct xy_softc *xysc; 1794 1795 { 1796 int del = 0, lcv, retval = XY_ERR_AOK; 1797 1798 /* soft reset hardware */ 1799 1800 if (!quiet) 1801 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1802 del = xycsc->xyc->xyc_rsetup; 1803 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1804 if (del == XY_ERR_FAIL) { 1805 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1806 retval = XY_ERR_FAIL; 1807 } 1808 if (xysc) 1809 xyc_xyreset(xycsc, xysc); 1810 1811 /* fix queues based on "blast-mode" */ 1812 1813 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1814 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1815 1816 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1817 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1818 XY_STATE(iorq->mode) != XY_SUB_NORM) 1819 /* is it active? */ 1820 continue; 1821 1822 if (blastmode == XY_RSET_ALL || 1823 blastmode != iorq) { 1824 /* failed */ 1825 iorq->errno = error; 1826 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1827 switch (XY_STATE(iorq->mode)) { 1828 case XY_SUB_NORM: 1829 iorq->buf->b_error = EIO; 1830 iorq->buf->b_flags |= B_ERROR; 1831 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1832 1833 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1834 iorq->dmamap->dm_mapsize, 1835 (iorq->buf->b_flags & B_READ) 1836 ? BUS_DMASYNC_POSTREAD 1837 : BUS_DMASYNC_POSTWRITE); 1838 1839 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1840 1841 (void)BUFQ_GET(&iorq->xy->xyq); 1842 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1843 (xycsc->reqs[lcv].buf->b_bcount - 1844 xycsc->reqs[lcv].buf->b_resid), 1845 (xycsc->reqs[lcv].buf->b_flags & B_READ)); 1846 biodone(iorq->buf); 1847 iorq->mode = XY_SUB_FREE; 1848 break; 1849 case XY_SUB_WAIT: 1850 wakeup(iorq); 1851 case XY_SUB_POLL: 1852 iorq->mode = 1853 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1854 break; 1855 } 1856 1857 } else { 1858 1859 /* resubmit, no need to do anything here */ 1860 } 1861 } 1862 1863 /* 1864 * now, if stuff is waiting, start it. 1865 * since we just reset it should go 1866 */ 1867 xyc_start(xycsc, NULL); 1868 1869 return (retval); 1870 } 1871 1872 /* 1873 * xyc_start: start waiting buffers 1874 */ 1875 1876 void 1877 xyc_start(xycsc, iorq) 1878 struct xyc_softc *xycsc; 1879 struct xy_iorq *iorq; 1880 1881 { 1882 int lcv; 1883 struct xy_softc *xy; 1884 1885 if (iorq == NULL) { 1886 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1887 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1888 if (BUFQ_PEEK(&xy->xyq) == NULL) continue; 1889 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1890 xyc_startbuf(xycsc, xy, BUFQ_PEEK(&xy->xyq)); 1891 } 1892 } 1893 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1894 } 1895 1896 /* 1897 * xyc_remove_iorq: remove "done" IOPB's. 1898 */ 1899 1900 int 1901 xyc_remove_iorq(xycsc) 1902 struct xyc_softc *xycsc; 1903 1904 { 1905 int errno, rq, comm, errs; 1906 struct xyc *xyc = xycsc->xyc; 1907 u_long addr; 1908 struct xy_iopb *iopb; 1909 struct xy_iorq *iorq; 1910 struct buf *bp; 1911 1912 if (xyc->xyc_csr & XYC_DERR) { 1913 /* 1914 * DOUBLE ERROR: should never happen under normal use. This 1915 * error is so bad, you can't even tell which IOPB is bad, so 1916 * we dump them all. 1917 */ 1918 errno = XY_ERR_DERR; 1919 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1920 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1921 printf("%s: soft reset failed!\n", 1922 xycsc->sc_dev.dv_xname); 1923 panic("xyc_remove_iorq: controller DEAD"); 1924 } 1925 return (XY_ERR_AOK); 1926 } 1927 1928 /* 1929 * get iopb that is done, loop down the chain 1930 */ 1931 1932 if (xyc->xyc_csr & XYC_ERR) { 1933 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1934 } 1935 if (xyc->xyc_csr & XYC_IPND) { 1936 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1937 } 1938 1939 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1940 iorq = xycsc->xy_chain[rq]; 1941 if (iorq == NULL) break; /* done ! */ 1942 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1943 continue; /* free, or done */ 1944 iopb = iorq->iopb; 1945 if (iopb->done == 0) 1946 continue; /* not done yet */ 1947 1948 comm = iopb->com; 1949 errs = iopb->errs; 1950 1951 if (errs) 1952 iorq->errno = iopb->errno; 1953 else 1954 iorq->errno = 0; 1955 1956 /* handle non-fatal errors */ 1957 1958 if (errs && 1959 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1960 continue; /* AOK: we resubmitted it */ 1961 1962 1963 /* this iorq is now done (hasn't been restarted or anything) */ 1964 1965 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1966 xyc_perror(iorq, iopb, 0); 1967 1968 /* now, if read/write check to make sure we got all the data 1969 * we needed. (this may not be the case if we got an error in 1970 * the middle of a multisector request). */ 1971 1972 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1973 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1974 /* we just successfully processed a bad144 sector 1975 * note: if we are in bad 144 mode, the pointers have 1976 * been advanced already (see above) and are pointing 1977 * at the bad144 sector. to exit bad144 mode, we 1978 * must advance the pointers 1 sector and issue a new 1979 * request if there are still sectors left to process 1980 * 1981 */ 1982 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1983 1984 /* exit b144 mode */ 1985 iorq->mode = iorq->mode & (~XY_MODE_B144); 1986 1987 if (iorq->sectcnt) { /* more to go! */ 1988 iorq->lasterror = iorq->errno = iopb->errno = 0; 1989 iopb->errs = iopb->done = 0; 1990 iorq->tries = 0; 1991 iopb->scnt = iorq->sectcnt; 1992 iopb->cyl = iorq->blockno / 1993 iorq->xy->sectpercyl; 1994 iopb->head = 1995 (iorq->blockno / iorq->xy->nhead) % 1996 iorq->xy->nhead; 1997 iopb->sect = iorq->blockno % XYFM_BPS; 1998 addr = (u_long) iorq->dbuf; 1999 iopb->dataa = (addr & 0xffff); 2000 iopb->datar = ((addr & 0xff0000) >> 16); 2001 /* will resubit at end */ 2002 continue; 2003 } 2004 } 2005 /* final cleanup, totally done with this request */ 2006 2007 switch (XY_STATE(iorq->mode)) { 2008 case XY_SUB_NORM: 2009 bp = iorq->buf; 2010 if (errs) { 2011 bp->b_error = EIO; 2012 bp->b_flags |= B_ERROR; 2013 bp->b_resid = iorq->sectcnt * XYFM_BPS; 2014 } else { 2015 bp->b_resid = 0; /* done */ 2016 } 2017 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 2018 iorq->dmamap->dm_mapsize, 2019 (iorq->buf->b_flags & B_READ) 2020 ? BUS_DMASYNC_POSTREAD 2021 : BUS_DMASYNC_POSTWRITE); 2022 2023 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 2024 2025 (void)BUFQ_GET(&iorq->xy->xyq); 2026 disk_unbusy(&iorq->xy->sc_dk, 2027 (bp->b_bcount - bp->b_resid), 2028 (bp->b_flags & B_READ)); 2029 iorq->mode = XY_SUB_FREE; 2030 biodone(bp); 2031 break; 2032 case XY_SUB_WAIT: 2033 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2034 wakeup(iorq); 2035 break; 2036 case XY_SUB_POLL: 2037 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2038 break; 2039 } 2040 } 2041 2042 return (XY_ERR_AOK); 2043 } 2044 2045 /* 2046 * xyc_perror: print error. 2047 * - if still_trying is true: we got an error, retried and got a 2048 * different error. in that case lasterror is the old error, 2049 * and errno is the new one. 2050 * - if still_trying is not true, then if we ever had an error it 2051 * is in lasterror. also, if iorq->errno == 0, then we recovered 2052 * from that error (otherwise iorq->errno == iorq->lasterror). 2053 */ 2054 void 2055 xyc_perror(iorq, iopb, still_trying) 2056 struct xy_iorq *iorq; 2057 struct xy_iopb *iopb; 2058 int still_trying; 2059 2060 { 2061 2062 int error = iorq->lasterror; 2063 2064 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 2065 : iorq->xyc->sc_dev.dv_xname); 2066 if (iorq->buf) 2067 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2068 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2069 printf("%s %d/%d/%d: ", 2070 (iopb->com == XYCMD_RD) ? "read" : "write", 2071 iopb->cyl, iopb->head, iopb->sect); 2072 printf("%s", xyc_e2str(error)); 2073 2074 if (still_trying) 2075 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 2076 else 2077 if (iorq->errno == 0) 2078 printf(" [recovered in %d tries]", iorq->tries); 2079 2080 printf("\n"); 2081 } 2082 2083 /* 2084 * xyc_error: non-fatal error encountered... recover. 2085 * return AOK if resubmitted, return FAIL if this iopb is done 2086 */ 2087 int 2088 xyc_error(xycsc, iorq, iopb, comm) 2089 struct xyc_softc *xycsc; 2090 struct xy_iorq *iorq; 2091 struct xy_iopb *iopb; 2092 int comm; 2093 2094 { 2095 int errno = iorq->errno; 2096 int erract = xyc_entoact(errno); 2097 int oldmode, advance; 2098 #ifdef __sparc__ 2099 int i; 2100 #endif 2101 2102 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2103 oldmode = iorq->mode; 2104 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2105 /* make xyc_start ignore us */ 2106 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 2107 iorq->mode = oldmode; 2108 } 2109 /* check for read/write to a sector in bad144 table if bad: redirect 2110 * request to bad144 area */ 2111 2112 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2113 (iorq->mode & XY_MODE_B144) == 0) { 2114 advance = iorq->sectcnt - iopb->scnt; 2115 XYC_ADVANCE(iorq, advance); 2116 #ifdef __sparc__ 2117 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2118 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2119 iorq->blockno % iorq->xy->nsect)) != -1) { 2120 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2121 * redirect */ 2122 iopb->errno = iopb->done = iopb->errs = 0; 2123 iopb->scnt = 1; 2124 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2125 /* second to last acyl */ 2126 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2127 * standard */ 2128 iopb->head = i / iorq->xy->nhead; 2129 iopb->sect = i % iorq->xy->nhead; 2130 /* will resubmit when we come out of remove_iorq */ 2131 return (XY_ERR_AOK); /* recovered! */ 2132 } 2133 #endif 2134 } 2135 2136 /* 2137 * it isn't a bad144 sector, must be real error! see if we can retry 2138 * it? 2139 */ 2140 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2141 xyc_perror(iorq, iopb, 1); /* inform of error state 2142 * change */ 2143 iorq->lasterror = errno; 2144 2145 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2146 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2147 iorq->tries++; 2148 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 2149 /* will resubmit at end of remove_iorq */ 2150 return (XY_ERR_AOK); /* recovered! */ 2151 } 2152 2153 /* failed to recover from this error */ 2154 return (XY_ERR_FAIL); 2155 } 2156 2157 /* 2158 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2159 */ 2160 void 2161 xyc_tick(arg) 2162 void *arg; 2163 2164 { 2165 struct xyc_softc *xycsc = arg; 2166 int lcv, s, reset = 0; 2167 2168 /* reduce ttl for each request if one goes to zero, reset xyc */ 2169 s = splbio(); 2170 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2171 if (xycsc->reqs[lcv].mode == 0 || 2172 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2173 continue; 2174 xycsc->reqs[lcv].ttl--; 2175 if (xycsc->reqs[lcv].ttl == 0) 2176 reset = 1; 2177 } 2178 if (reset) { 2179 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2180 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2181 } 2182 splx(s); 2183 2184 /* until next time */ 2185 2186 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2187 } 2188 2189 /* 2190 * xyc_ioctlcmd: this function provides a user level interface to the 2191 * controller via ioctl. this allows "format" programs to be written 2192 * in user code, and is also useful for some debugging. we return 2193 * an error code. called at user priority. 2194 * 2195 * XXX missing a few commands (see the 7053 driver for ideas) 2196 */ 2197 int 2198 xyc_ioctlcmd(xy, dev, xio) 2199 struct xy_softc *xy; 2200 dev_t dev; 2201 struct xd_iocmd *xio; 2202 2203 { 2204 int s, rqno, dummy = 0; 2205 caddr_t dvmabuf = NULL, buf = NULL; 2206 struct xyc_softc *xycsc; 2207 int rseg, error; 2208 bus_dma_segment_t seg; 2209 2210 /* check sanity of requested command */ 2211 2212 switch (xio->cmd) { 2213 2214 case XYCMD_NOP: /* no op: everything should be zero */ 2215 if (xio->subfn || xio->dptr || xio->dlen || 2216 xio->block || xio->sectcnt) 2217 return (EINVAL); 2218 break; 2219 2220 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2221 case XYCMD_WR: 2222 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2223 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2224 return (EINVAL); 2225 break; 2226 2227 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2228 return (EINVAL); 2229 2230 break; 2231 2232 default: 2233 return (EINVAL);/* ??? */ 2234 } 2235 2236 xycsc = xy->parent; 2237 2238 /* create DVMA buffer for request if needed */ 2239 if (xio->dlen) { 2240 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2241 &seg, &rseg, 2242 xio->dlen, &buf, 2243 (bus_addr_t *)&dvmabuf)) != 0) { 2244 return (error); 2245 } 2246 2247 if (xio->cmd == XYCMD_WR) { 2248 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2249 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2250 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2251 return (error); 2252 } 2253 } 2254 } 2255 /* do it! */ 2256 2257 error = 0; 2258 s = splbio(); 2259 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2260 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2261 if (rqno == XY_ERR_FAIL) { 2262 error = EIO; 2263 goto done; 2264 } 2265 xio->errno = xycsc->ciorq->errno; 2266 xio->tries = xycsc->ciorq->tries; 2267 XYC_DONE(xycsc, dummy); 2268 2269 if (xio->cmd == XYCMD_RD) 2270 error = copyout(buf, xio->dptr, xio->dlen); 2271 2272 done: 2273 splx(s); 2274 if (dvmabuf) { 2275 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2276 xio->dlen, buf); 2277 } 2278 return (error); 2279 } 2280 2281 /* 2282 * xyc_e2str: convert error code number into an error string 2283 */ 2284 char * 2285 xyc_e2str(no) 2286 int no; 2287 { 2288 switch (no) { 2289 case XY_ERR_FAIL: 2290 return ("Software fatal error"); 2291 case XY_ERR_DERR: 2292 return ("DOUBLE ERROR"); 2293 case XY_ERR_AOK: 2294 return ("Successful completion"); 2295 case XY_ERR_IPEN: 2296 return("Interrupt pending"); 2297 case XY_ERR_BCFL: 2298 return("Busy conflict"); 2299 case XY_ERR_TIMO: 2300 return("Operation timeout"); 2301 case XY_ERR_NHDR: 2302 return("Header not found"); 2303 case XY_ERR_HARD: 2304 return("Hard ECC error"); 2305 case XY_ERR_ICYL: 2306 return("Illegal cylinder address"); 2307 case XY_ERR_ISEC: 2308 return("Illegal sector address"); 2309 case XY_ERR_SMAL: 2310 return("Last sector too small"); 2311 case XY_ERR_SACK: 2312 return("Slave ACK error (non-existent memory)"); 2313 case XY_ERR_CHER: 2314 return("Cylinder and head/header error"); 2315 case XY_ERR_SRTR: 2316 return("Auto-seek retry successful"); 2317 case XY_ERR_WPRO: 2318 return("Write-protect error"); 2319 case XY_ERR_UIMP: 2320 return("Unimplemented command"); 2321 case XY_ERR_DNRY: 2322 return("Drive not ready"); 2323 case XY_ERR_SZER: 2324 return("Sector count zero"); 2325 case XY_ERR_DFLT: 2326 return("Drive faulted"); 2327 case XY_ERR_ISSZ: 2328 return("Illegal sector size"); 2329 case XY_ERR_SLTA: 2330 return("Self test A"); 2331 case XY_ERR_SLTB: 2332 return("Self test B"); 2333 case XY_ERR_SLTC: 2334 return("Self test C"); 2335 case XY_ERR_SOFT: 2336 return("Soft ECC error"); 2337 case XY_ERR_SFOK: 2338 return("Soft ECC error recovered"); 2339 case XY_ERR_IHED: 2340 return("Illegal head"); 2341 case XY_ERR_DSEQ: 2342 return("Disk sequencer error"); 2343 case XY_ERR_SEEK: 2344 return("Seek error"); 2345 default: 2346 return ("Unknown error"); 2347 } 2348 } 2349 2350 int 2351 xyc_entoact(errno) 2352 2353 int errno; 2354 2355 { 2356 switch (errno) { 2357 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2358 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2359 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2360 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2361 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2362 2363 return(XY_ERA_PROG); /* program error ! */ 2364 2365 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2366 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2367 case XY_ERR_SOFT: 2368 2369 return(XY_ERA_HARD); /* hard error, retry */ 2370 2371 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2372 2373 return(XY_ERA_RSET); /* hard error reset */ 2374 2375 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2376 2377 return(XY_ERA_SOFT); /* an FYI error */ 2378 2379 case XY_ERR_WPRO: 2380 2381 return(XY_ERA_WPRO); /* write protect */ 2382 } 2383 2384 return(XY_ERA_PROG); /* ??? */ 2385 } 2386
Indexes created Tue Sep 30 20:09:53 GMT 2025