xy.c revision 1.12
1 /* $NetBSD: xy.c,v 1.12 1999/06/30 15:07:45 drochner 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 #undef XYC_DEBUG /* full debug */ 54 #undef XYC_DIAG /* extra sanity checks */ 55 #if defined(DIAGNOSTIC) && !defined(XYC_DIAG) 56 #define XYC_DIAG /* link in with master DIAG option */ 57 #endif 58 59 #include <sys/param.h> 60 #include <sys/proc.h> 61 #include <sys/systm.h> 62 #include <sys/kernel.h> 63 #include <sys/file.h> 64 #include <sys/stat.h> 65 #include <sys/ioctl.h> 66 #include <sys/buf.h> 67 #include <sys/uio.h> 68 #include <sys/malloc.h> 69 #include <sys/device.h> 70 #include <sys/disklabel.h> 71 #include <sys/disk.h> 72 #include <sys/syslog.h> 73 #include <sys/dkbad.h> 74 #include <sys/conf.h> 75 76 #include <vm/vm.h> 77 #include <vm/vm_kern.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/vmevar.h> 87 88 #include <dev/vme/xyreg.h> 89 #include <dev/vme/xyvar.h> 90 #include <dev/vme/xio.h> 91 92 #include "locators.h" 93 94 /* 95 * macros 96 */ 97 98 /* 99 * XYC_GO: start iopb ADDR (DVMA addr in a u_long) on XYC 100 */ 101 #define XYC_GO(XYC, ADDR) { \ 102 (XYC)->xyc_addr_lo = ((ADDR) & 0xff); \ 103 (ADDR) = ((ADDR) >> 8); \ 104 (XYC)->xyc_addr_hi = ((ADDR) & 0xff); \ 105 (ADDR) = ((ADDR) >> 8); \ 106 (XYC)->xyc_reloc_lo = ((ADDR) & 0xff); \ 107 (ADDR) = ((ADDR) >> 8); \ 108 (XYC)->xyc_reloc_hi = (ADDR); \ 109 (XYC)->xyc_csr = XYC_GBSY; /* go! */ \ 110 } 111 112 /* 113 * XYC_DONE: don't need IORQ, get error code and free (done after xyc_cmd) 114 */ 115 116 #define XYC_DONE(SC,ER) { \ 117 if ((ER) == XY_ERR_AOK) { \ 118 (ER) = (SC)->ciorq->errno; \ 119 (SC)->ciorq->mode = XY_SUB_FREE; \ 120 wakeup((SC)->ciorq); \ 121 } \ 122 } 123 124 /* 125 * XYC_ADVANCE: advance iorq's pointers by a number of sectors 126 */ 127 128 #define XYC_ADVANCE(IORQ, N) { \ 129 if (N) { \ 130 (IORQ)->sectcnt -= (N); \ 131 (IORQ)->blockno += (N); \ 132 (IORQ)->dbuf += ((N)*XYFM_BPS); \ 133 } \ 134 } 135 136 /* 137 * note - addresses you can sleep on: 138 * [1] & of xy_softc's "state" (waiting for a chance to attach a drive) 139 * [2] & an iorq (waiting for an XY_SUB_WAIT iorq to finish) 140 */ 141 142 143 /* 144 * function prototypes 145 * "xyc_*" functions are internal, all others are external interfaces 146 */ 147 148 extern int pil_to_vme[]; /* from obio.c */ 149 150 /* internals */ 151 struct xy_iopb *xyc_chain __P((struct xyc_softc *, struct xy_iorq *)); 152 int xyc_cmd __P((struct xyc_softc *, int, int, int, int, int, char *, int)); 153 char *xyc_e2str __P((int)); 154 int xyc_entoact __P((int)); 155 int xyc_error __P((struct xyc_softc *, struct xy_iorq *, 156 struct xy_iopb *, int)); 157 int xyc_ioctlcmd __P((struct xy_softc *, dev_t dev, struct xd_iocmd *)); 158 void xyc_perror __P((struct xy_iorq *, struct xy_iopb *, int)); 159 int xyc_piodriver __P((struct xyc_softc *, struct xy_iorq *)); 160 int xyc_remove_iorq __P((struct xyc_softc *)); 161 int xyc_reset __P((struct xyc_softc *, int, struct xy_iorq *, int, 162 struct xy_softc *)); 163 inline void xyc_rqinit __P((struct xy_iorq *, struct xyc_softc *, 164 struct xy_softc *, int, u_long, int, 165 caddr_t, struct buf *)); 166 void xyc_rqtopb __P((struct xy_iorq *, struct xy_iopb *, int, int)); 167 void xyc_start __P((struct xyc_softc *, struct xy_iorq *)); 168 int xyc_startbuf __P((struct xyc_softc *, struct xy_softc *, struct buf *)); 169 int xyc_submit_iorq __P((struct xyc_softc *, struct xy_iorq *, int)); 170 void xyc_tick __P((void *)); 171 int xyc_unbusy __P((struct xyc *, int)); 172 void xyc_xyreset __P((struct xyc_softc *, struct xy_softc *)); 173 174 /* machine interrupt hook */ 175 int xycintr __P((void *)); 176 177 /* autoconf */ 178 int xycmatch __P((struct device *, struct cfdata *, void *)); 179 void xycattach __P((struct device *, struct device *, void *)); 180 int xymatch __P((struct device *, struct cfdata *, void *)); 181 void xyattach __P((struct device *, struct device *, void *)); 182 static int xyc_probe __P((void *, bus_space_tag_t, bus_space_handle_t)); 183 184 static void xydummystrat __P((struct buf *)); 185 int xygetdisklabel __P((struct xy_softc *, void *)); 186 187 bdev_decl(xy); 188 cdev_decl(xy); 189 190 /* 191 * cfattach's: device driver interface to autoconfig 192 */ 193 194 struct cfattach xyc_ca = { 195 sizeof(struct xyc_softc), xycmatch, xycattach 196 }; 197 198 struct cfattach xy_ca = { 199 sizeof(struct xy_softc), xymatch, xyattach 200 }; 201 202 extern struct cfdriver xy_cd; 203 204 struct xyc_attach_args { /* this is the "aux" args to xyattach */ 205 int driveno; /* unit number */ 206 int fullmode; /* submit mode */ 207 int booting; /* are we booting or not? */ 208 }; 209 210 /* 211 * dkdriver 212 */ 213 214 struct dkdriver xydkdriver = { xystrategy }; 215 216 /* 217 * start: disk label fix code (XXX) 218 */ 219 220 static void *xy_labeldata; 221 222 static void 223 xydummystrat(bp) 224 struct buf *bp; 225 { 226 if (bp->b_bcount != XYFM_BPS) 227 panic("xydummystrat"); 228 bcopy(xy_labeldata, bp->b_un.b_addr, XYFM_BPS); 229 bp->b_flags |= B_DONE; 230 bp->b_flags &= ~B_BUSY; 231 } 232 233 int 234 xygetdisklabel(xy, b) 235 struct xy_softc *xy; 236 void *b; 237 { 238 char *err; 239 #if defined(__sparc__) || defined(__sun3__) 240 struct sun_disklabel *sdl; 241 #endif 242 243 /* We already have the label data in `b'; setup for dummy strategy */ 244 xy_labeldata = b; 245 246 /* Required parameter for readdisklabel() */ 247 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; 248 249 err = readdisklabel(MAKEDISKDEV(0, xy->sc_dev.dv_unit, RAW_PART), 250 xydummystrat, 251 xy->sc_dk.dk_label, xy->sc_dk.dk_cpulabel); 252 if (err) { 253 printf("%s: %s\n", xy->sc_dev.dv_xname, err); 254 return(XY_ERR_FAIL); 255 } 256 257 #if defined(__sparc__) || defined(__sun3__) 258 /* Ok, we have the label; fill in `pcyl' if there's SunOS magic */ 259 sdl = (struct sun_disklabel *)xy->sc_dk.dk_cpulabel->cd_block; 260 if (sdl->sl_magic == SUN_DKMAGIC) { 261 xy->pcyl = sdl->sl_pcylinders; 262 } else 263 #endif 264 { 265 printf("%s: WARNING: no `pcyl' in disk label.\n", 266 xy->sc_dev.dv_xname); 267 xy->pcyl = xy->sc_dk.dk_label->d_ncylinders + 268 xy->sc_dk.dk_label->d_acylinders; 269 printf("%s: WARNING: guessing pcyl=%d (ncyl+acyl)\n", 270 xy->sc_dev.dv_xname, xy->pcyl); 271 } 272 #endif 273 274 xy->ncyl = xy->sc_dk.dk_label->d_ncylinders; 275 xy->acyl = xy->sc_dk.dk_label->d_acylinders; 276 xy->nhead = xy->sc_dk.dk_label->d_ntracks; 277 xy->nsect = xy->sc_dk.dk_label->d_nsectors; 278 xy->sectpercyl = xy->nhead * xy->nsect; 279 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; /* not handled by 280 * sun->bsd */ 281 return(XY_ERR_AOK); 282 } 283 284 /* 285 * end: disk label fix code (XXX) 286 */ 287 288 /* 289 * a u t o c o n f i g f u n c t i o n s 290 */ 291 292 /* 293 * xycmatch: determine if xyc is present or not. we do a 294 * soft reset to detect the xyc. 295 */ 296 int 297 xyc_probe(arg, tag, handle) 298 void *arg; 299 bus_space_tag_t tag; 300 bus_space_handle_t handle; 301 { 302 struct xyc *xyc = (void *)handle; /* XXX */ 303 304 return ((xyc_unbusy(xyc, XYC_RESETUSEC) != XY_ERR_FAIL) ? 0 : EIO); 305 } 306 307 int xycmatch(parent, cf, aux) 308 struct device *parent; 309 struct cfdata *cf; 310 void *aux; 311 { 312 struct vme_attach_args *va = aux; 313 vme_chipset_tag_t ct = va->va_vct; 314 vme_am_t mod; 315 int error; 316 317 mod = 0x2d; /* VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */ 318 if (vme_space_alloc(va->va_vct, va->r[0].offset, sizeof(struct xyc), 319 mod)) 320 return (0); 321 error = vme_probe(ct, va->r[0].offset, sizeof(struct xyc), 322 mod, VME_D32, xyc_probe, 0); 323 vme_space_free(va->va_vct, va->r[0].offset, sizeof(struct xyc), mod); 324 325 return (error == 0); 326 } 327 328 /* 329 * xycattach: attach controller 330 */ 331 void 332 xycattach(parent, self, aux) 333 struct device *parent, *self; 334 void *aux; 335 336 { 337 struct vme_attach_args *va = aux; 338 vme_chipset_tag_t ct = va->va_vct; 339 bus_space_tag_t bt; 340 bus_space_handle_t bh; 341 vme_intr_handle_t ih; 342 vme_am_t mod; 343 struct xyc_softc *xyc = (void *) self; 344 struct xyc_attach_args xa; 345 int lcv, res, pbsz, error; 346 bus_dma_segment_t seg; 347 int rseg; 348 vme_mapresc_t resc; 349 350 /* get addressing and intr level stuff from autoconfig and load it 351 * into our xyc_softc. */ 352 353 mod = 0x2d; /* VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */ 354 355 if (vme_space_alloc(va->va_vct, va->r[0].offset, sizeof(struct xyc), 356 mod)) 357 panic("xyc: vme alloc"); 358 if (vme_space_map(ct, va->r[0].offset, sizeof(struct xyc), 359 mod, VME_D32, 0, &bt, &bh, &resc) != 0) 360 panic("xyc: vme_map"); 361 362 xyc->xyc = (struct xyc *) bh; /* XXX */ 363 xyc->ipl = va->ilevel; 364 xyc->vector = va->ivector; 365 xyc->no_ols = 0; /* XXX should be from config */ 366 367 for (lcv = 0; lcv < XYC_MAXDEV; lcv++) 368 xyc->sc_drives[lcv] = (struct xy_softc *) 0; 369 370 /* 371 * allocate and zero buffers 372 * check boundaries of the KVA's ... all IOPBs must reside in 373 * the same 64K region. 374 */ 375 376 pbsz = XYC_MAXIOPB * sizeof(struct xy_iopb); 377 378 error = bus_dmamem_alloc( 379 xyc->dmatag, 380 pbsz, /* size */ 381 64*1024, /* boundary */ 382 0, /* alignment */ 383 &seg, 384 1, /* # of segments */ 385 &rseg, /* actual # of segments */ 386 BUS_DMA_NOWAIT); 387 if (error) { 388 printf("%s: DMA buffer map error %d\n", 389 xyc->sc_dev.dv_xname, error); 390 return; 391 } 392 xyc->dvmaiopb = (struct xy_iopb *)seg.ds_addr; 393 394 error = bus_dmamem_map( 395 xyc->dmatag, 396 &seg, 397 rseg, 398 XYC_MAXIOPB * sizeof(struct xy_iopb), 399 (caddr_t *)&xyc->iopbase, 400 BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 401 if (error) { 402 bus_dmamem_free(xyc->dmatag, &seg, rseg); 403 printf("%s: DMA buffer map error %d\n", 404 xyc->sc_dev.dv_xname, error); 405 return; 406 } 407 bzero(xyc->iopbase, pbsz); 408 409 xyc->reqs = (struct xy_iorq *) 410 malloc(XYC_MAXIOPB * sizeof(struct xy_iorq), M_DEVBUF, M_NOWAIT); 411 if (xyc->reqs == NULL) 412 panic("xyc malloc"); 413 bzero(xyc->reqs, XYC_MAXIOPB * sizeof(struct xy_iorq)); 414 415 /* 416 * init iorq to iopb pointers, and non-zero fields in the 417 * iopb which never change. 418 */ 419 420 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 421 xyc->xy_chain[lcv] = NULL; 422 xyc->reqs[lcv].iopb = &xyc->iopbase[lcv]; 423 xyc->reqs[lcv].dmaiopb = &xyc->dvmaiopb[lcv]; 424 xyc->iopbase[lcv].asr = 1; /* always the same */ 425 xyc->iopbase[lcv].eef = 1; /* always the same */ 426 xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */ 427 xyc->iopbase[lcv].aud = 1; /* always the same */ 428 xyc->iopbase[lcv].relo = 1; /* always the same */ 429 xyc->iopbase[lcv].thro = XY_THRO;/* always the same */ 430 431 error = bus_dmamap_create( 432 xyc->dmatag, 433 MAXPHYS, /* size */ 434 1, /* nsegments */ 435 MAXPHYS, /* maxsegsz */ 436 0, /* boundary */ 437 BUS_DMA_NOWAIT, 438 &xyc->reqs[lcv].dmamap); 439 if (error) { 440 printf("%s: DMA buffer map create error %d\n", 441 xyc->sc_dev.dv_xname, error); 442 return; 443 } 444 } 445 xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */ 446 xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */ 447 xyc->xy_hand = 0; 448 449 /* read controller parameters and insure we have a 450/451 */ 450 451 error = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL); 452 res = xyc->ciopb->ctyp; 453 XYC_DONE(xyc, error); 454 if (res != XYCT_450) { 455 if (error) 456 printf(": %s: ", xyc_e2str(error)); 457 printf(": doesn't identify as a 450/451\n"); 458 return; 459 } 460 printf(": Xylogics 450/451"); 461 if (xyc->no_ols) 462 printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */ 463 printf("\n"); 464 if (error) { 465 printf("%s: error: %s\n", xyc->sc_dev.dv_xname, 466 xyc_e2str(error)); 467 return; 468 } 469 if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) { 470 printf("%s: 24 bit addressing turned off\n", 471 xyc->sc_dev.dv_xname); 472 printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n"); 473 printf("to enable 24 bit mode and this driver\n"); 474 return; 475 } 476 477 /* link in interrupt with higher level software */ 478 vme_intr_map(ct, va->ivector, va->ilevel, &ih); 479 vme_intr_establish(ct, ih, IPL_BIO, xycintr, xyc); 480 evcnt_attach(&xyc->sc_dev, "intr", &xyc->sc_intrcnt); 481 482 483 /* now we must look for disks using autoconfig */ 484 xa.fullmode = XY_SUB_POLL; 485 xa.booting = 1; 486 487 for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++) 488 (void) config_found(self, (void *) &xa, NULL); 489 490 /* start the watchdog clock */ 491 timeout(xyc_tick, xyc, XYC_TICKCNT); 492 493 } 494 495 /* 496 * xymatch: probe for disk. 497 * 498 * note: we almost always say disk is present. this allows us to 499 * spin up and configure a disk after the system is booted (we can 500 * call xyattach!). 501 */ 502 int 503 xymatch(parent, cf, aux) 504 struct device *parent; 505 struct cfdata *cf; 506 void *aux; 507 { 508 struct xyc_attach_args *xa = aux; 509 510 /* looking for autoconf wildcard or exact match */ 511 512 if (cf->cf_loc[XYCCF_DRIVE] != XYCCF_DRIVE_DEFAULT && 513 cf->cf_loc[XYCCF_DRIVE] != xa->driveno) 514 return 0; 515 516 return 1; 517 518 } 519 520 /* 521 * xyattach: attach a disk. this can be called from autoconf and also 522 * from xyopen/xystrategy. 523 */ 524 void 525 xyattach(parent, self, aux) 526 struct device *parent, *self; 527 void *aux; 528 529 { 530 struct xy_softc *xy = (void *) self, *oxy; 531 struct xyc_softc *xyc = (void *) parent; 532 struct xyc_attach_args *xa = aux; 533 int spt, mb, blk, lcv, fmode, s = 0, newstate; 534 struct dkbad *dkb; 535 int rseg, error; 536 bus_dma_segment_t seg; 537 caddr_t dmaddr; 538 caddr_t buf; 539 540 /* 541 * Always re-initialize the disk structure. We want statistics 542 * to start with a clean slate. 543 */ 544 bzero(&xy->sc_dk, sizeof(xy->sc_dk)); 545 xy->sc_dk.dk_driver = &xydkdriver; 546 xy->sc_dk.dk_name = xy->sc_dev.dv_xname; 547 548 /* if booting, init the xy_softc */ 549 550 if (xa->booting) { 551 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 552 xy->flags = 0; 553 xy->parent = xyc; 554 555 /* init queue of waiting bufs */ 556 557 xy->xyq.b_active = 0; 558 xy->xyq.b_actf = 0; 559 xy->xyq.b_actb = &xy->xyq.b_actf; /* XXX b_actb: not used? */ 560 561 xy->xyrq = &xyc->reqs[xa->driveno]; 562 563 } 564 xy->xy_drive = xa->driveno; 565 fmode = xa->fullmode; 566 xyc->sc_drives[xa->driveno] = xy; 567 568 /* if not booting, make sure we are the only process in the attach for 569 * this drive. if locked out, sleep on it. */ 570 571 if (!xa->booting) { 572 s = splbio(); 573 while (xy->state == XY_DRIVE_ATTACHING) { 574 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 575 splx(s); 576 return; 577 } 578 } 579 printf("%s at %s", 580 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 581 } 582 583 /* we now have control */ 584 xy->state = XY_DRIVE_ATTACHING; 585 newstate = XY_DRIVE_UNKNOWN; 586 587 buf = NULL; 588 error = bus_dmamem_alloc(xyc->dmatag, XYFM_BPS, NBPG, 0, 589 &seg, 1, &rseg, BUS_DMA_NOWAIT); 590 if (error) { 591 printf("%s: DMA buffer alloc error %d\n", 592 xy->sc_dev.dv_xname, error); 593 goto done; 594 } 595 dmaddr = (caddr_t)seg.ds_addr; 596 597 error = bus_dmamem_map(xyc->dmatag, &seg, rseg, XYFM_BPS, 598 &buf, 599 BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 600 if (error) { 601 printf("%s: DMA buffer alloc error %d\n", 602 xy->sc_dev.dv_xname, error); 603 bus_dmamem_free(xyc->dmatag, &seg, rseg); 604 goto done; 605 } 606 607 608 /* first try and reset the drive */ 609 610 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 611 XYC_DONE(xyc, error); 612 if (error == XY_ERR_DNRY) { 613 printf(" drive %d: off-line\n", xa->driveno); 614 goto done; 615 } 616 if (error) { 617 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 618 goto done; 619 } 620 printf(" drive %d: ready", xa->driveno); 621 622 /* 623 * now set drive parameters (to semi-bogus values) so we can read the 624 * disk label. 625 */ 626 xy->pcyl = xy->ncyl = 1; 627 xy->acyl = 0; 628 xy->nhead = 1; 629 xy->nsect = 1; 630 xy->sectpercyl = 1; 631 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 632 xy->dkb.bt_bad[lcv].bt_cyl = 633 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 634 635 /* read disk label */ 636 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 637 xy->drive_type++) { 638 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 639 dmaddr, fmode); 640 XYC_DONE(xyc, error); 641 if (error == XY_ERR_AOK) break; 642 } 643 644 if (error != XY_ERR_AOK) { 645 printf("\n%s: reading disk label failed: %s\n", 646 xy->sc_dev.dv_xname, xyc_e2str(error)); 647 goto done; 648 } 649 printf(" (drive type %d)\n", xy->drive_type); 650 651 newstate = XY_DRIVE_NOLABEL; 652 653 xy->hw_spt = spt = 0; /* XXX needed ? */ 654 /* Attach the disk: must be before getdisklabel to malloc label */ 655 disk_attach(&xy->sc_dk); 656 657 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 658 goto done; 659 660 /* inform the user of what is up */ 661 printf("%s: <%s>, pcyl %d\n", xy->sc_dev.dv_xname, 662 buf, xy->pcyl); 663 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 664 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 665 xy->sc_dev.dv_xname, mb, xy->ncyl, xy->nhead, xy->nsect, 666 XYFM_BPS); 667 668 /* 669 * 450/451 stupidity: the drive type is encoded into the format 670 * of the disk. the drive type in the IOPB must match the drive 671 * type in the format, or you will not be able to do I/O to the 672 * disk (you get header not found errors). if you have two drives 673 * of different sizes that have the same drive type in their 674 * formatting then you are out of luck. 675 * 676 * this problem was corrected in the 753/7053. 677 */ 678 679 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 680 oxy = xyc->sc_drives[lcv]; 681 if (oxy == NULL || oxy == xy) continue; 682 if (oxy->drive_type != xy->drive_type) continue; 683 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 684 xy->nhead != oxy->nhead) { 685 printf("%s: %s and %s must be the same size!\n", 686 xyc->sc_dev.dv_xname, xy->sc_dev.dv_xname, 687 oxy->sc_dev.dv_xname); 688 panic("xy drive size mismatch"); 689 } 690 } 691 692 693 /* now set the real drive parameters! */ 694 695 blk = (xy->nsect - 1) + 696 ((xy->nhead - 1) * xy->nsect) + 697 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 698 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 699 XYC_DONE(xyc, error); 700 if (error) { 701 printf("%s: write drive size failed: %s\n", 702 xy->sc_dev.dv_xname, xyc_e2str(error)); 703 goto done; 704 } 705 newstate = XY_DRIVE_ONLINE; 706 707 /* 708 * read bad144 table. this table resides on the first sector of the 709 * last track of the disk (i.e. second cyl of "acyl" area). 710 */ 711 712 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 713 /* last cyl */ 714 (xy->nhead - 1) * xy->nsect; /* last head */ 715 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 716 dmaddr, fmode); 717 XYC_DONE(xyc, error); 718 if (error) { 719 printf("%s: reading bad144 failed: %s\n", 720 xy->sc_dev.dv_xname, xyc_e2str(error)); 721 goto done; 722 } 723 724 /* check dkbad for sanity */ 725 dkb = (struct dkbad *) buf; 726 for (lcv = 0; lcv < 126; lcv++) { 727 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 728 dkb->bt_bad[lcv].bt_cyl == 0) && 729 dkb->bt_bad[lcv].bt_trksec == 0xffff) 730 continue; /* blank */ 731 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 732 break; 733 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 734 break; 735 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 736 break; 737 } 738 if (lcv != 126) { 739 printf("%s: warning: invalid bad144 sector!\n", 740 xy->sc_dev.dv_xname); 741 } else { 742 bcopy(buf, &xy->dkb, XYFM_BPS); 743 } 744 745 dk_establish(&xy->sc_dk, &xy->sc_dev); /* XXX */ 746 747 done: 748 if (buf != NULL) { 749 bus_dmamem_unmap(xyc->dmatag, buf, XYFM_BPS); 750 bus_dmamem_free(xyc->dmatag, &seg, rseg); 751 } 752 753 xy->state = newstate; 754 if (!xa->booting) { 755 wakeup(&xy->state); 756 splx(s); 757 } 758 } 759 760 /* 761 * end of autoconfig functions 762 */ 763 764 /* 765 * { b , c } d e v s w f u n c t i o n s 766 */ 767 768 /* 769 * xyclose: close device 770 */ 771 int 772 xyclose(dev, flag, fmt, p) 773 dev_t dev; 774 int flag, fmt; 775 struct proc *p; 776 777 { 778 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 779 int part = DISKPART(dev); 780 781 /* clear mask bits */ 782 783 switch (fmt) { 784 case S_IFCHR: 785 xy->sc_dk.dk_copenmask &= ~(1 << part); 786 break; 787 case S_IFBLK: 788 xy->sc_dk.dk_bopenmask &= ~(1 << part); 789 break; 790 } 791 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 792 793 return 0; 794 } 795 796 /* 797 * xydump: crash dump system 798 */ 799 int 800 xydump(dev, blkno, va, size) 801 dev_t dev; 802 daddr_t blkno; 803 caddr_t va; 804 size_t size; 805 { 806 int unit, part; 807 struct xy_softc *xy; 808 809 unit = DISKUNIT(dev); 810 if (unit >= xy_cd.cd_ndevs) 811 return ENXIO; 812 part = DISKPART(dev); 813 814 xy = xy_cd.cd_devs[unit]; 815 816 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 817 'a' + part); 818 819 return ENXIO; 820 821 /* outline: globals: "dumplo" == sector number of partition to start 822 * dump at (convert to physical sector with partition table) 823 * "dumpsize" == size of dump in clicks "physmem" == size of physical 824 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 825 * physmem) 826 * 827 * dump a copy of physical memory to the dump device starting at sector 828 * "dumplo" in the swap partition (make sure > 0). map in pages as 829 * we go. use polled I/O. 830 * 831 * XXX how to handle NON_CONTIG? */ 832 833 } 834 835 /* 836 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 837 */ 838 int 839 xyioctl(dev, command, addr, flag, p) 840 dev_t dev; 841 u_long command; 842 caddr_t addr; 843 int flag; 844 struct proc *p; 845 846 { 847 struct xy_softc *xy; 848 struct xd_iocmd *xio; 849 int error, s, unit; 850 851 unit = DISKUNIT(dev); 852 853 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 854 return (ENXIO); 855 856 /* switch on ioctl type */ 857 858 switch (command) { 859 case DIOCSBAD: /* set bad144 info */ 860 if ((flag & FWRITE) == 0) 861 return EBADF; 862 s = splbio(); 863 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 864 splx(s); 865 return 0; 866 867 case DIOCGDINFO: /* get disk label */ 868 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 869 return 0; 870 871 case DIOCGPART: /* get partition info */ 872 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 873 ((struct partinfo *) addr)->part = 874 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 875 return 0; 876 877 case DIOCSDINFO: /* set disk label */ 878 if ((flag & FWRITE) == 0) 879 return EBADF; 880 error = setdisklabel(xy->sc_dk.dk_label, 881 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 882 xy->sc_dk.dk_cpulabel); 883 if (error == 0) { 884 if (xy->state == XY_DRIVE_NOLABEL) 885 xy->state = XY_DRIVE_ONLINE; 886 } 887 return error; 888 889 case DIOCWLABEL: /* change write status of disk label */ 890 if ((flag & FWRITE) == 0) 891 return EBADF; 892 if (*(int *) addr) 893 xy->flags |= XY_WLABEL; 894 else 895 xy->flags &= ~XY_WLABEL; 896 return 0; 897 898 case DIOCWDINFO: /* write disk label */ 899 if ((flag & FWRITE) == 0) 900 return EBADF; 901 error = setdisklabel(xy->sc_dk.dk_label, 902 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 903 xy->sc_dk.dk_cpulabel); 904 if (error == 0) { 905 if (xy->state == XY_DRIVE_NOLABEL) 906 xy->state = XY_DRIVE_ONLINE; 907 908 /* Simulate opening partition 0 so write succeeds. */ 909 xy->sc_dk.dk_openmask |= (1 << 0); 910 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 911 xystrategy, xy->sc_dk.dk_label, 912 xy->sc_dk.dk_cpulabel); 913 xy->sc_dk.dk_openmask = 914 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 915 } 916 return error; 917 918 case DIOSXDCMD: 919 xio = (struct xd_iocmd *) addr; 920 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 921 return (error); 922 return (xyc_ioctlcmd(xy, dev, xio)); 923 924 default: 925 return ENOTTY; 926 } 927 } 928 929 /* 930 * xyopen: open drive 931 */ 932 933 int 934 xyopen(dev, flag, fmt, p) 935 dev_t dev; 936 int flag, fmt; 937 struct proc *p; 938 { 939 int unit, part; 940 struct xy_softc *xy; 941 struct xyc_attach_args xa; 942 943 /* first, could it be a valid target? */ 944 945 unit = DISKUNIT(dev); 946 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 947 return (ENXIO); 948 part = DISKPART(dev); 949 950 /* do we need to attach the drive? */ 951 952 if (xy->state == XY_DRIVE_UNKNOWN) { 953 xa.driveno = xy->xy_drive; 954 xa.fullmode = XY_SUB_WAIT; 955 xa.booting = 0; 956 xyattach((struct device *) xy->parent, 957 (struct device *) xy, &xa); 958 if (xy->state == XY_DRIVE_UNKNOWN) { 959 return (EIO); 960 } 961 } 962 /* check for partition */ 963 964 if (part != RAW_PART && 965 (part >= xy->sc_dk.dk_label->d_npartitions || 966 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 967 return (ENXIO); 968 } 969 /* set open masks */ 970 971 switch (fmt) { 972 case S_IFCHR: 973 xy->sc_dk.dk_copenmask |= (1 << part); 974 break; 975 case S_IFBLK: 976 xy->sc_dk.dk_bopenmask |= (1 << part); 977 break; 978 } 979 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 980 981 return 0; 982 } 983 984 int 985 xyread(dev, uio, flags) 986 dev_t dev; 987 struct uio *uio; 988 int flags; 989 { 990 991 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 992 } 993 994 int 995 xywrite(dev, uio, flags) 996 dev_t dev; 997 struct uio *uio; 998 int flags; 999 { 1000 1001 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1002 } 1003 1004 1005 /* 1006 * xysize: return size of a partition for a dump 1007 */ 1008 1009 int 1010 xysize(dev) 1011 dev_t dev; 1012 1013 { 1014 struct xy_softc *xysc; 1015 int unit, part, size, omask; 1016 1017 /* valid unit? */ 1018 unit = DISKUNIT(dev); 1019 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1020 return (-1); 1021 1022 part = DISKPART(dev); 1023 omask = xysc->sc_dk.dk_openmask & (1 << part); 1024 1025 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1026 return (-1); 1027 1028 /* do it */ 1029 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1030 size = -1; /* only give valid size for swap partitions */ 1031 else 1032 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1033 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1034 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1035 return (-1); 1036 return (size); 1037 } 1038 1039 /* 1040 * xystrategy: buffering system interface to xy. 1041 */ 1042 1043 void 1044 xystrategy(bp) 1045 struct buf *bp; 1046 1047 { 1048 struct xy_softc *xy; 1049 int s, unit; 1050 struct xyc_attach_args xa; 1051 1052 unit = DISKUNIT(bp->b_dev); 1053 1054 /* check for live device */ 1055 1056 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1057 bp->b_blkno < 0 || 1058 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1059 bp->b_error = EINVAL; 1060 goto bad; 1061 } 1062 /* do we need to attach the drive? */ 1063 1064 if (xy->state == XY_DRIVE_UNKNOWN) { 1065 xa.driveno = xy->xy_drive; 1066 xa.fullmode = XY_SUB_WAIT; 1067 xa.booting = 0; 1068 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1069 if (xy->state == XY_DRIVE_UNKNOWN) { 1070 bp->b_error = EIO; 1071 goto bad; 1072 } 1073 } 1074 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1075 /* no I/O to unlabeled disks, unless raw partition */ 1076 bp->b_error = EIO; 1077 goto bad; 1078 } 1079 /* short circuit zero length request */ 1080 1081 if (bp->b_bcount == 0) 1082 goto done; 1083 1084 /* check bounds with label (disksubr.c). Determine the size of the 1085 * transfer, and make sure it is within the boundaries of the 1086 * partition. Adjust transfer if needed, and signal errors or early 1087 * completion. */ 1088 1089 if (bounds_check_with_label(bp, xy->sc_dk.dk_label, 1090 (xy->flags & XY_WLABEL) != 0) <= 0) 1091 goto done; 1092 1093 /* 1094 * now we know we have a valid buf structure that we need to do I/O 1095 * on. 1096 */ 1097 s = splbio(); /* protect the queues */ 1098 1099 disksort(&xy->xyq, bp); 1100 1101 /* start 'em up */ 1102 1103 xyc_start(xy->parent, NULL); 1104 1105 /* done! */ 1106 1107 splx(s); 1108 return; 1109 1110 bad: /* tells upper layers we have an error */ 1111 bp->b_flags |= B_ERROR; 1112 done: /* tells upper layers we are done with this 1113 * buf */ 1114 bp->b_resid = bp->b_bcount; 1115 biodone(bp); 1116 } 1117 /* 1118 * end of {b,c}devsw functions 1119 */ 1120 1121 /* 1122 * i n t e r r u p t f u n c t i o n 1123 * 1124 * xycintr: hardware interrupt. 1125 */ 1126 int 1127 xycintr(v) 1128 void *v; 1129 1130 { 1131 struct xyc_softc *xycsc = v; 1132 1133 /* kick the event counter */ 1134 1135 xycsc->sc_intrcnt.ev_count++; 1136 1137 /* remove as many done IOPBs as possible */ 1138 1139 xyc_remove_iorq(xycsc); 1140 1141 /* start any iorq's already waiting */ 1142 1143 xyc_start(xycsc, NULL); 1144 1145 return (1); 1146 } 1147 /* 1148 * end of interrupt function 1149 */ 1150 1151 /* 1152 * i n t e r n a l f u n c t i o n s 1153 */ 1154 1155 /* 1156 * xyc_rqinit: fill out the fields of an I/O request 1157 */ 1158 1159 inline void 1160 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1161 struct xy_iorq *rq; 1162 struct xyc_softc *xyc; 1163 struct xy_softc *xy; 1164 int md; 1165 u_long blk; 1166 int cnt; 1167 caddr_t db; 1168 struct buf *bp; 1169 { 1170 rq->xyc = xyc; 1171 rq->xy = xy; 1172 rq->ttl = XYC_MAXTTL + 10; 1173 rq->mode = md; 1174 rq->tries = rq->errno = rq->lasterror = 0; 1175 rq->blockno = blk; 1176 rq->sectcnt = cnt; 1177 rq->dbuf = db; 1178 rq->buf = bp; 1179 } 1180 1181 /* 1182 * xyc_rqtopb: load up an IOPB based on an iorq 1183 */ 1184 1185 void 1186 xyc_rqtopb(iorq, iopb, cmd, subfun) 1187 struct xy_iorq *iorq; 1188 struct xy_iopb *iopb; 1189 int cmd, subfun; 1190 1191 { 1192 u_long block, dp; 1193 1194 /* normal IOPB case, standard stuff */ 1195 1196 /* chain bit handled later */ 1197 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1198 iopb->com = cmd; 1199 iopb->errno = 0; 1200 iopb->errs = 0; 1201 iopb->done = 0; 1202 if (iorq->xy) { 1203 iopb->unit = iorq->xy->xy_drive; 1204 iopb->dt = iorq->xy->drive_type; 1205 } else { 1206 iopb->unit = 0; 1207 iopb->dt = 0; 1208 } 1209 block = iorq->blockno; 1210 if (iorq->xy == NULL || block == 0) { 1211 iopb->sect = iopb->head = iopb->cyl = 0; 1212 } else { 1213 iopb->sect = block % iorq->xy->nsect; 1214 block = block / iorq->xy->nsect; 1215 iopb->head = block % iorq->xy->nhead; 1216 block = block / iorq->xy->nhead; 1217 iopb->cyl = block; 1218 } 1219 iopb->scnt = iorq->sectcnt; 1220 dp = (u_long) iorq->dbuf; 1221 if (iorq->dbuf == NULL) { 1222 iopb->dataa = 0; 1223 iopb->datar = 0; 1224 } else { 1225 iopb->dataa = (dp & 0xffff); 1226 iopb->datar = ((dp & 0xff0000) >> 16); 1227 } 1228 iopb->subfn = subfun; 1229 } 1230 1231 1232 /* 1233 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1234 */ 1235 1236 int 1237 xyc_unbusy(xyc, del) 1238 1239 struct xyc *xyc; 1240 int del; 1241 1242 { 1243 while (del-- > 0) { 1244 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1245 break; 1246 DELAY(1); 1247 } 1248 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1249 } 1250 1251 /* 1252 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1253 * note that NORM requests are handled seperately. 1254 */ 1255 int 1256 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1257 struct xyc_softc *xycsc; 1258 int cmd, subfn, unit, block, scnt; 1259 char *dptr; 1260 int fullmode; 1261 1262 { 1263 int submode = XY_STATE(fullmode); 1264 struct xy_iorq *iorq = xycsc->ciorq; 1265 struct xy_iopb *iopb = xycsc->ciopb; 1266 1267 /* 1268 * is someone else using the control iopq wait for it if we can 1269 */ 1270 start: 1271 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1272 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1273 return(XY_ERR_FAIL); 1274 goto start; 1275 } 1276 1277 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1278 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1279 iorq->mode = XY_SUB_FREE; 1280 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1281 } 1282 1283 /* init iorq/iopb */ 1284 1285 xyc_rqinit(iorq, xycsc, 1286 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1287 fullmode, block, scnt, dptr, NULL); 1288 1289 /* load IOPB from iorq */ 1290 1291 xyc_rqtopb(iorq, iopb, cmd, subfn); 1292 1293 /* submit it for processing */ 1294 1295 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1296 1297 return(XY_ERR_AOK); 1298 } 1299 1300 /* 1301 * xyc_startbuf 1302 * start a buffer for running 1303 */ 1304 1305 int 1306 xyc_startbuf(xycsc, xysc, bp) 1307 struct xyc_softc *xycsc; 1308 struct xy_softc *xysc; 1309 struct buf *bp; 1310 1311 { 1312 int partno, error; 1313 struct xy_iorq *iorq; 1314 struct xy_iopb *iopb; 1315 u_long block; 1316 1317 iorq = xysc->xyrq; 1318 iopb = iorq->iopb; 1319 1320 /* get buf */ 1321 1322 if (bp == NULL) 1323 panic("xyc_startbuf null buf"); 1324 1325 partno = DISKPART(bp->b_dev); 1326 #ifdef XYC_DEBUG 1327 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1328 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1329 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1330 bp->b_bcount, bp->b_data); 1331 #endif 1332 1333 /* 1334 * load request. we have to calculate the correct block number based 1335 * on partition info. 1336 * 1337 * note that iorq points to the buffer as mapped into DVMA space, 1338 * where as the bp->b_data points to its non-DVMA mapping. 1339 */ 1340 1341 block = bp->b_blkno + ((partno == RAW_PART) ? 0 : 1342 xysc->sc_dk.dk_label->d_partitions[partno].p_offset); 1343 1344 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1345 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1346 if (error != 0) { 1347 printf("%s: warning: cannot load DMA map\n", 1348 xycsc->sc_dev.dv_xname); 1349 return (XY_ERR_FAIL); /* XXX: need some sort of 1350 * call-back scheme here? */ 1351 } 1352 1353 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1354 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1355 ? BUS_DMASYNC_PREREAD 1356 : BUS_DMASYNC_PREWRITE); 1357 1358 /* init iorq and load iopb from it */ 1359 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1360 bp->b_bcount / XYFM_BPS, 1361 (caddr_t)iorq->dmamap->dm_segs[0].ds_addr, 1362 bp); 1363 1364 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1365 1366 /* Instrumentation. */ 1367 disk_busy(&xysc->sc_dk); 1368 1369 return (XY_ERR_AOK); 1370 } 1371 1372 1373 /* 1374 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1375 * if ok. if it fail returns an error code. type is XY_SUB_*. 1376 * 1377 * note: caller frees iorq in all cases except NORM 1378 * 1379 * return value: 1380 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1381 * WAIT: XY_AOK (success), <error-code> (failed) 1382 * POLL: <same as WAIT> 1383 * NOQ : <same as NORM> 1384 * 1385 * there are three sources for i/o requests: 1386 * [1] xystrategy: normal block I/O, using "struct buf" system. 1387 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1388 * [3] open/ioctl: these are I/O requests done in the context of a process, 1389 * and the process should block until they are done. 1390 * 1391 * software state is stored in the iorq structure. each iorq has an 1392 * iopb structure. the hardware understands the iopb structure. 1393 * every command must go through an iopb. a 450 handles one iopb at a 1394 * time, where as a 451 can take them in chains. [the 450 claims it 1395 * can handle chains, but is appears to be buggy...] iopb are allocated 1396 * in DVMA space at boot up time. each disk gets one iopb, and the 1397 * controller gets one (for POLL and WAIT commands). what happens if 1398 * the iopb is busy? for i/o type [1], the buffers are queued at the 1399 * "buff" layer and * picked up later by the interrupt routine. for case 1400 * [2] we can only be blocked if there is a WAIT type I/O request being 1401 * run. since this can only happen when we are crashing, we wait a sec 1402 * and then steal the IOPB. for case [3] the process can sleep 1403 * on the iorq free list until some iopbs are avaliable. 1404 */ 1405 1406 1407 int 1408 xyc_submit_iorq(xycsc, iorq, type) 1409 struct xyc_softc *xycsc; 1410 struct xy_iorq *iorq; 1411 int type; 1412 1413 { 1414 struct xy_iopb *dmaiopb; 1415 1416 #ifdef XYC_DEBUG 1417 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1418 xycsc->sc_dev.dv_xname, iorq, type); 1419 #endif 1420 1421 /* first check and see if controller is busy */ 1422 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1423 #ifdef XYC_DEBUG 1424 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1425 #endif 1426 if (type == XY_SUB_NOQ) 1427 return (XY_ERR_FAIL); /* failed */ 1428 switch (type) { 1429 case XY_SUB_NORM: 1430 return XY_ERR_AOK; /* success */ 1431 case XY_SUB_WAIT: 1432 while (iorq->iopb->done == 0) { 1433 sleep(iorq, PRIBIO); 1434 } 1435 return (iorq->errno); 1436 case XY_SUB_POLL: /* steal controller */ 1437 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1438 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1439 panic("xyc_submit_iorq: stuck xyc"); 1440 printf("%s: stole controller\n", 1441 xycsc->sc_dev.dv_xname); 1442 break; 1443 default: 1444 panic("xyc_submit_iorq adding"); 1445 } 1446 } 1447 1448 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1449 if (dmaiopb == NULL) { /* nothing doing? */ 1450 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1451 return(XY_ERR_AOK); 1452 panic("xyc_submit_iorq: xyc_chain failed!\n"); 1453 } 1454 1455 XYC_GO(xycsc->xyc, (u_long)dmaiopb); 1456 1457 /* command now running, wrap it up */ 1458 switch (type) { 1459 case XY_SUB_NORM: 1460 case XY_SUB_NOQ: 1461 return (XY_ERR_AOK); /* success */ 1462 case XY_SUB_WAIT: 1463 while (iorq->iopb->done == 0) { 1464 sleep(iorq, PRIBIO); 1465 } 1466 return (iorq->errno); 1467 case XY_SUB_POLL: 1468 return (xyc_piodriver(xycsc, iorq)); 1469 default: 1470 panic("xyc_submit_iorq wrap up"); 1471 } 1472 panic("xyc_submit_iorq"); 1473 return 0; /* not reached */ 1474 } 1475 1476 1477 /* 1478 * xyc_chain: build a chain. return dvma address of first element in 1479 * the chain. iorq != NULL: means we only want that item on the chain. 1480 */ 1481 1482 struct xy_iopb * 1483 xyc_chain(xycsc, iorq) 1484 struct xyc_softc *xycsc; 1485 struct xy_iorq *iorq; 1486 1487 { 1488 int togo, chain, hand; 1489 1490 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1491 1492 /* 1493 * promote control IOPB to the top 1494 */ 1495 if (iorq == NULL) { 1496 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1497 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1498 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1499 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1500 } 1501 1502 /* 1503 * special case: if iorq != NULL then we have a POLL or WAIT request. 1504 * we let these take priority and do them first. 1505 */ 1506 if (iorq) { 1507 xycsc->xy_chain[0] = iorq; 1508 iorq->iopb->chen = 0; 1509 return(iorq->dmaiopb); 1510 } 1511 1512 /* 1513 * NORM case: do round robin and maybe chain (if allowed and possible) 1514 */ 1515 chain = 0; 1516 hand = xycsc->xy_hand; 1517 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1518 1519 for (togo = XYC_MAXIOPB; togo > 0; 1520 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1521 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1522 1523 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1524 xycsc->iopbase[hand].done) 1525 continue; /* not ready-for-i/o */ 1526 1527 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1528 iopb = xycsc->xy_chain[chain]->iopb; 1529 iopb->chen = 0; 1530 if (chain != 0) { 1531 /* adding a link to a chain */ 1532 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1533 prev_iopb->chen = 1; 1534 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1535 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1536 } else { 1537 /* head of chain */ 1538 iorq = xycsc->xy_chain[chain]; 1539 } 1540 chain++; 1541 1542 /* quit if chaining dis-allowed */ 1543 if (xycsc->no_ols) 1544 break; 1545 } 1546 1547 return(iorq ? iorq->dmaiopb : NULL); 1548 } 1549 1550 /* 1551 * xyc_piodriver 1552 * 1553 * programmed i/o driver. this function takes over the computer 1554 * and drains off the polled i/o request. it returns the status of the iorq 1555 * the caller is interesting in. 1556 */ 1557 int 1558 xyc_piodriver(xycsc, iorq) 1559 struct xyc_softc *xycsc; 1560 struct xy_iorq *iorq; 1561 1562 { 1563 int nreset = 0; 1564 int retval = 0; 1565 u_long res; 1566 #ifdef XYC_DEBUG 1567 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1568 #endif 1569 1570 while (iorq->iopb->done == 0) { 1571 1572 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1573 1574 /* we expect some progress soon */ 1575 if (res == XY_ERR_FAIL && nreset >= 2) { 1576 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1577 #ifdef XYC_DEBUG 1578 printf("xyc_piodriver: timeout\n"); 1579 #endif 1580 return (XY_ERR_FAIL); 1581 } 1582 if (res == XY_ERR_FAIL) { 1583 if (xyc_reset(xycsc, 0, 1584 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1585 XY_ERR_FAIL, 1586 0) == XY_ERR_FAIL) 1587 return (XY_ERR_FAIL); /* flushes all but POLL 1588 * requests, resets */ 1589 continue; 1590 } 1591 1592 xyc_remove_iorq(xycsc); /* may resubmit request */ 1593 1594 if (iorq->iopb->done == 0) 1595 xyc_start(xycsc, iorq); 1596 } 1597 1598 /* get return value */ 1599 1600 retval = iorq->errno; 1601 1602 #ifdef XYC_DEBUG 1603 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1604 iorq->errno, xyc_e2str(iorq->errno)); 1605 #endif 1606 1607 /* start up any bufs that have queued */ 1608 1609 xyc_start(xycsc, NULL); 1610 1611 return (retval); 1612 } 1613 1614 /* 1615 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1616 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1617 */ 1618 void 1619 xyc_xyreset(xycsc, xysc) 1620 struct xyc_softc *xycsc; 1621 struct xy_softc *xysc; 1622 1623 { 1624 struct xy_iopb tmpiopb; 1625 struct xy_iopb *iopb; 1626 int del; 1627 1628 iopb = xycsc->ciopb; 1629 1630 /* Save contents */ 1631 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1632 1633 iopb->chen = iopb->done = iopb->errs = 0; 1634 iopb->ien = 0; 1635 iopb->com = XYCMD_RST; 1636 iopb->unit = xysc->xy_drive; 1637 1638 XYC_GO(xycsc->xyc, (u_long)xycsc->ciorq->dmaiopb); 1639 1640 del = XYC_RESETUSEC; 1641 while (del > 0) { 1642 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1643 break; 1644 DELAY(1); 1645 del--; 1646 } 1647 1648 if (del <= 0 || iopb->errs) { 1649 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1650 xyc_e2str(iopb->errno)); 1651 del = xycsc->xyc->xyc_rsetup; 1652 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1653 panic("xyc_reset"); 1654 } else { 1655 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1656 } 1657 1658 /* Restore contents */ 1659 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1660 } 1661 1662 1663 /* 1664 * xyc_reset: reset everything: requests are marked as errors except 1665 * a polled request (which is resubmitted) 1666 */ 1667 int 1668 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1669 struct xyc_softc *xycsc; 1670 int quiet, error; 1671 struct xy_iorq *blastmode; 1672 struct xy_softc *xysc; 1673 1674 { 1675 int del = 0, lcv, retval = XY_ERR_AOK; 1676 1677 /* soft reset hardware */ 1678 1679 if (!quiet) 1680 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1681 del = xycsc->xyc->xyc_rsetup; 1682 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1683 if (del == XY_ERR_FAIL) { 1684 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1685 retval = XY_ERR_FAIL; 1686 } 1687 if (xysc) 1688 xyc_xyreset(xycsc, xysc); 1689 1690 /* fix queues based on "blast-mode" */ 1691 1692 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1693 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1694 1695 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1696 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1697 XY_STATE(iorq->mode) != XY_SUB_NORM) 1698 /* is it active? */ 1699 continue; 1700 1701 if (blastmode == XY_RSET_ALL || 1702 blastmode != iorq) { 1703 /* failed */ 1704 iorq->errno = error; 1705 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1706 switch (XY_STATE(iorq->mode)) { 1707 case XY_SUB_NORM: 1708 iorq->buf->b_error = EIO; 1709 iorq->buf->b_flags |= B_ERROR; 1710 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1711 1712 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1713 iorq->dmamap->dm_mapsize, 1714 (iorq->buf->b_flags & B_READ) 1715 ? BUS_DMASYNC_POSTREAD 1716 : BUS_DMASYNC_POSTWRITE); 1717 1718 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1719 1720 iorq->xy->xyq.b_actf = iorq->buf->b_actf; 1721 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1722 (xycsc->reqs[lcv].buf->b_bcount - 1723 xycsc->reqs[lcv].buf->b_resid)); 1724 biodone(iorq->buf); 1725 iorq->mode = XY_SUB_FREE; 1726 break; 1727 case XY_SUB_WAIT: 1728 wakeup(iorq); 1729 case XY_SUB_POLL: 1730 iorq->mode = 1731 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1732 break; 1733 } 1734 1735 } else { 1736 1737 /* resubmit, no need to do anything here */ 1738 } 1739 } 1740 1741 /* 1742 * now, if stuff is waiting, start it. 1743 * since we just reset it should go 1744 */ 1745 xyc_start(xycsc, NULL); 1746 1747 return (retval); 1748 } 1749 1750 /* 1751 * xyc_start: start waiting buffers 1752 */ 1753 1754 void 1755 xyc_start(xycsc, iorq) 1756 struct xyc_softc *xycsc; 1757 struct xy_iorq *iorq; 1758 1759 { 1760 int lcv; 1761 struct xy_softc *xy; 1762 1763 if (iorq == NULL) { 1764 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1765 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1766 if (xy->xyq.b_actf == NULL) continue; 1767 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1768 xyc_startbuf(xycsc, xy, xy->xyq.b_actf); 1769 } 1770 } 1771 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1772 } 1773 1774 /* 1775 * xyc_remove_iorq: remove "done" IOPB's. 1776 */ 1777 1778 int 1779 xyc_remove_iorq(xycsc) 1780 struct xyc_softc *xycsc; 1781 1782 { 1783 int errno, rq, comm, errs; 1784 struct xyc *xyc = xycsc->xyc; 1785 u_long addr; 1786 struct xy_iopb *iopb; 1787 struct xy_iorq *iorq; 1788 struct buf *bp; 1789 1790 if (xyc->xyc_csr & XYC_DERR) { 1791 /* 1792 * DOUBLE ERROR: should never happen under normal use. This 1793 * error is so bad, you can't even tell which IOPB is bad, so 1794 * we dump them all. 1795 */ 1796 errno = XY_ERR_DERR; 1797 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1798 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1799 printf("%s: soft reset failed!\n", 1800 xycsc->sc_dev.dv_xname); 1801 panic("xyc_remove_iorq: controller DEAD"); 1802 } 1803 return (XY_ERR_AOK); 1804 } 1805 1806 /* 1807 * get iopb that is done, loop down the chain 1808 */ 1809 1810 if (xyc->xyc_csr & XYC_ERR) { 1811 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1812 } 1813 if (xyc->xyc_csr & XYC_IPND) { 1814 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1815 } 1816 1817 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1818 iorq = xycsc->xy_chain[rq]; 1819 if (iorq == NULL) break; /* done ! */ 1820 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1821 continue; /* free, or done */ 1822 iopb = iorq->iopb; 1823 if (iopb->done == 0) 1824 continue; /* not done yet */ 1825 1826 comm = iopb->com; 1827 errs = iopb->errs; 1828 1829 if (errs) 1830 iorq->errno = iopb->errno; 1831 else 1832 iorq->errno = 0; 1833 1834 /* handle non-fatal errors */ 1835 1836 if (errs && 1837 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1838 continue; /* AOK: we resubmitted it */ 1839 1840 1841 /* this iorq is now done (hasn't been restarted or anything) */ 1842 1843 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1844 xyc_perror(iorq, iopb, 0); 1845 1846 /* now, if read/write check to make sure we got all the data 1847 * we needed. (this may not be the case if we got an error in 1848 * the middle of a multisector request). */ 1849 1850 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1851 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1852 /* we just successfully processed a bad144 sector 1853 * note: if we are in bad 144 mode, the pointers have 1854 * been advanced already (see above) and are pointing 1855 * at the bad144 sector. to exit bad144 mode, we 1856 * must advance the pointers 1 sector and issue a new 1857 * request if there are still sectors left to process 1858 * 1859 */ 1860 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1861 1862 /* exit b144 mode */ 1863 iorq->mode = iorq->mode & (~XY_MODE_B144); 1864 1865 if (iorq->sectcnt) { /* more to go! */ 1866 iorq->lasterror = iorq->errno = iopb->errno = 0; 1867 iopb->errs = iopb->done = 0; 1868 iorq->tries = 0; 1869 iopb->scnt = iorq->sectcnt; 1870 iopb->cyl = iorq->blockno / 1871 iorq->xy->sectpercyl; 1872 iopb->head = 1873 (iorq->blockno / iorq->xy->nhead) % 1874 iorq->xy->nhead; 1875 iopb->sect = iorq->blockno % XYFM_BPS; 1876 addr = (u_long) iorq->dbuf; 1877 iopb->dataa = (addr & 0xffff); 1878 iopb->datar = ((addr & 0xff0000) >> 16); 1879 /* will resubit at end */ 1880 continue; 1881 } 1882 } 1883 /* final cleanup, totally done with this request */ 1884 1885 switch (XY_STATE(iorq->mode)) { 1886 case XY_SUB_NORM: 1887 bp = iorq->buf; 1888 if (errs) { 1889 bp->b_error = EIO; 1890 bp->b_flags |= B_ERROR; 1891 bp->b_resid = iorq->sectcnt * XYFM_BPS; 1892 } else { 1893 bp->b_resid = 0; /* done */ 1894 } 1895 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1896 iorq->dmamap->dm_mapsize, 1897 (iorq->buf->b_flags & B_READ) 1898 ? BUS_DMASYNC_POSTREAD 1899 : BUS_DMASYNC_POSTWRITE); 1900 1901 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1902 1903 iorq->xy->xyq.b_actf = bp->b_actf; 1904 disk_unbusy(&iorq->xy->sc_dk, 1905 (bp->b_bcount - bp->b_resid)); 1906 iorq->mode = XY_SUB_FREE; 1907 biodone(bp); 1908 break; 1909 case XY_SUB_WAIT: 1910 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1911 wakeup(iorq); 1912 break; 1913 case XY_SUB_POLL: 1914 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1915 break; 1916 } 1917 } 1918 1919 return (XY_ERR_AOK); 1920 } 1921 1922 /* 1923 * xyc_perror: print error. 1924 * - if still_trying is true: we got an error, retried and got a 1925 * different error. in that case lasterror is the old error, 1926 * and errno is the new one. 1927 * - if still_trying is not true, then if we ever had an error it 1928 * is in lasterror. also, if iorq->errno == 0, then we recovered 1929 * from that error (otherwise iorq->errno == iorq->lasterror). 1930 */ 1931 void 1932 xyc_perror(iorq, iopb, still_trying) 1933 struct xy_iorq *iorq; 1934 struct xy_iopb *iopb; 1935 int still_trying; 1936 1937 { 1938 1939 int error = iorq->lasterror; 1940 1941 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 1942 : iorq->xyc->sc_dev.dv_xname); 1943 if (iorq->buf) 1944 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 1945 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 1946 printf("%s %d/%d/%d: ", 1947 (iopb->com == XYCMD_RD) ? "read" : "write", 1948 iopb->cyl, iopb->head, iopb->sect); 1949 printf("%s", xyc_e2str(error)); 1950 1951 if (still_trying) 1952 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 1953 else 1954 if (iorq->errno == 0) 1955 printf(" [recovered in %d tries]", iorq->tries); 1956 1957 printf("\n"); 1958 } 1959 1960 /* 1961 * xyc_error: non-fatal error encountered... recover. 1962 * return AOK if resubmitted, return FAIL if this iopb is done 1963 */ 1964 int 1965 xyc_error(xycsc, iorq, iopb, comm) 1966 struct xyc_softc *xycsc; 1967 struct xy_iorq *iorq; 1968 struct xy_iopb *iopb; 1969 int comm; 1970 1971 { 1972 int errno = iorq->errno; 1973 int erract = xyc_entoact(errno); 1974 int oldmode, advance; 1975 #ifdef sparc 1976 int i; 1977 #endif 1978 1979 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 1980 oldmode = iorq->mode; 1981 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 1982 /* make xyc_start ignore us */ 1983 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 1984 iorq->mode = oldmode; 1985 } 1986 /* check for read/write to a sector in bad144 table if bad: redirect 1987 * request to bad144 area */ 1988 1989 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 1990 (iorq->mode & XY_MODE_B144) == 0) { 1991 advance = iorq->sectcnt - iopb->scnt; 1992 XYC_ADVANCE(iorq, advance); 1993 #ifdef sparc 1994 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 1995 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 1996 iorq->blockno % iorq->xy->nsect)) != -1) { 1997 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 1998 * redirect */ 1999 iopb->errno = iopb->done = iopb->errs = 0; 2000 iopb->scnt = 1; 2001 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2002 /* second to last acyl */ 2003 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2004 * standard */ 2005 iopb->head = i / iorq->xy->nhead; 2006 iopb->sect = i % iorq->xy->nhead; 2007 /* will resubmit when we come out of remove_iorq */ 2008 return (XY_ERR_AOK); /* recovered! */ 2009 } 2010 #endif 2011 } 2012 2013 /* 2014 * it isn't a bad144 sector, must be real error! see if we can retry 2015 * it? 2016 */ 2017 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2018 xyc_perror(iorq, iopb, 1); /* inform of error state 2019 * change */ 2020 iorq->lasterror = errno; 2021 2022 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2023 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2024 iorq->tries++; 2025 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 2026 /* will resubmit at end of remove_iorq */ 2027 return (XY_ERR_AOK); /* recovered! */ 2028 } 2029 2030 /* failed to recover from this error */ 2031 return (XY_ERR_FAIL); 2032 } 2033 2034 /* 2035 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2036 */ 2037 void 2038 xyc_tick(arg) 2039 void *arg; 2040 2041 { 2042 struct xyc_softc *xycsc = arg; 2043 int lcv, s, reset = 0; 2044 2045 /* reduce ttl for each request if one goes to zero, reset xyc */ 2046 s = splbio(); 2047 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2048 if (xycsc->reqs[lcv].mode == 0 || 2049 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2050 continue; 2051 xycsc->reqs[lcv].ttl--; 2052 if (xycsc->reqs[lcv].ttl == 0) 2053 reset = 1; 2054 } 2055 if (reset) { 2056 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2057 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2058 } 2059 splx(s); 2060 2061 /* until next time */ 2062 2063 timeout(xyc_tick, xycsc, XYC_TICKCNT); 2064 } 2065 2066 /* 2067 * xyc_ioctlcmd: this function provides a user level interface to the 2068 * controller via ioctl. this allows "format" programs to be written 2069 * in user code, and is also useful for some debugging. we return 2070 * an error code. called at user priority. 2071 * 2072 * XXX missing a few commands (see the 7053 driver for ideas) 2073 */ 2074 int 2075 xyc_ioctlcmd(xy, dev, xio) 2076 struct xy_softc *xy; 2077 dev_t dev; 2078 struct xd_iocmd *xio; 2079 2080 { 2081 int s, rqno, dummy = 0; 2082 caddr_t dvmabuf = NULL, buf = NULL; 2083 struct xyc_softc *xycsc; 2084 int rseg, error; 2085 bus_dma_segment_t seg; 2086 2087 /* check sanity of requested command */ 2088 2089 switch (xio->cmd) { 2090 2091 case XYCMD_NOP: /* no op: everything should be zero */ 2092 if (xio->subfn || xio->dptr || xio->dlen || 2093 xio->block || xio->sectcnt) 2094 return (EINVAL); 2095 break; 2096 2097 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2098 case XYCMD_WR: 2099 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2100 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2101 return (EINVAL); 2102 break; 2103 2104 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2105 return (EINVAL); 2106 2107 break; 2108 2109 default: 2110 return (EINVAL);/* ??? */ 2111 } 2112 2113 xycsc = xy->parent; 2114 2115 /* create DVMA buffer for request if needed */ 2116 if (xio->dlen) { 2117 error = bus_dmamem_alloc(xycsc->dmatag, xio->dlen, NBPG, 0, 2118 &seg, 1, &rseg, BUS_DMA_WAITOK); 2119 if (error) { 2120 return (error); 2121 } 2122 dvmabuf = (caddr_t)seg.ds_addr; 2123 2124 error = bus_dmamem_map(xycsc->dmatag, &seg, rseg, xio->dlen, 2125 &buf, 2126 BUS_DMA_WAITOK|BUS_DMA_COHERENT); 2127 if (error) { 2128 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2129 return (error); 2130 } 2131 if (xio->cmd == XYCMD_WR) { 2132 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2133 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2134 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2135 return (error); 2136 } 2137 } 2138 } 2139 /* do it! */ 2140 2141 error = 0; 2142 s = splbio(); 2143 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2144 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2145 if (rqno == XY_ERR_FAIL) { 2146 error = EIO; 2147 goto done; 2148 } 2149 xio->errno = xycsc->ciorq->errno; 2150 xio->tries = xycsc->ciorq->tries; 2151 XYC_DONE(xycsc, dummy); 2152 2153 if (xio->cmd == XYCMD_RD) 2154 error = copyout(buf, xio->dptr, xio->dlen); 2155 2156 done: 2157 splx(s); 2158 if (dvmabuf) { 2159 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2160 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2161 } 2162 return (error); 2163 } 2164 2165 /* 2166 * xyc_e2str: convert error code number into an error string 2167 */ 2168 char * 2169 xyc_e2str(no) 2170 int no; 2171 { 2172 switch (no) { 2173 case XY_ERR_FAIL: 2174 return ("Software fatal error"); 2175 case XY_ERR_DERR: 2176 return ("DOUBLE ERROR"); 2177 case XY_ERR_AOK: 2178 return ("Successful completion"); 2179 case XY_ERR_IPEN: 2180 return("Interrupt pending"); 2181 case XY_ERR_BCFL: 2182 return("Busy conflict"); 2183 case XY_ERR_TIMO: 2184 return("Operation timeout"); 2185 case XY_ERR_NHDR: 2186 return("Header not found"); 2187 case XY_ERR_HARD: 2188 return("Hard ECC error"); 2189 case XY_ERR_ICYL: 2190 return("Illegal cylinder address"); 2191 case XY_ERR_ISEC: 2192 return("Illegal sector address"); 2193 case XY_ERR_SMAL: 2194 return("Last sector too small"); 2195 case XY_ERR_SACK: 2196 return("Slave ACK error (non-existent memory)"); 2197 case XY_ERR_CHER: 2198 return("Cylinder and head/header error"); 2199 case XY_ERR_SRTR: 2200 return("Auto-seek retry successful"); 2201 case XY_ERR_WPRO: 2202 return("Write-protect error"); 2203 case XY_ERR_UIMP: 2204 return("Unimplemented command"); 2205 case XY_ERR_DNRY: 2206 return("Drive not ready"); 2207 case XY_ERR_SZER: 2208 return("Sector count zero"); 2209 case XY_ERR_DFLT: 2210 return("Drive faulted"); 2211 case XY_ERR_ISSZ: 2212 return("Illegal sector size"); 2213 case XY_ERR_SLTA: 2214 return("Self test A"); 2215 case XY_ERR_SLTB: 2216 return("Self test B"); 2217 case XY_ERR_SLTC: 2218 return("Self test C"); 2219 case XY_ERR_SOFT: 2220 return("Soft ECC error"); 2221 case XY_ERR_SFOK: 2222 return("Soft ECC error recovered"); 2223 case XY_ERR_IHED: 2224 return("Illegal head"); 2225 case XY_ERR_DSEQ: 2226 return("Disk sequencer error"); 2227 case XY_ERR_SEEK: 2228 return("Seek error"); 2229 default: 2230 return ("Unknown error"); 2231 } 2232 } 2233 2234 int 2235 xyc_entoact(errno) 2236 2237 int errno; 2238 2239 { 2240 switch (errno) { 2241 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2242 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2243 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2244 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2245 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2246 2247 return(XY_ERA_PROG); /* program error ! */ 2248 2249 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2250 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2251 case XY_ERR_SOFT: 2252 2253 return(XY_ERA_HARD); /* hard error, retry */ 2254 2255 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2256 2257 return(XY_ERA_RSET); /* hard error reset */ 2258 2259 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2260 2261 return(XY_ERA_SOFT); /* an FYI error */ 2262 2263 case XY_ERR_WPRO: 2264 2265 return(XY_ERA_WPRO); /* write protect */ 2266 } 2267 2268 return(XY_ERA_PROG); /* ??? */ 2269 } 2270
Indexes created Tue Sep 30 07:10:03 GMT 2025