xy.c revision 1.18
1 /* $NetBSD: xy.c,v 1.18 2000/04/10 02:16:16 chs 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 } 272 273 xy->ncyl = xy->sc_dk.dk_label->d_ncylinders; 274 xy->acyl = xy->sc_dk.dk_label->d_acylinders; 275 xy->nhead = xy->sc_dk.dk_label->d_ntracks; 276 xy->nsect = xy->sc_dk.dk_label->d_nsectors; 277 xy->sectpercyl = xy->nhead * xy->nsect; 278 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; /* not handled by 279 * sun->bsd */ 280 return(XY_ERR_AOK); 281 } 282 283 /* 284 * end: disk label fix code (XXX) 285 */ 286 287 /* 288 * a u t o c o n f i g f u n c t i o n s 289 */ 290 291 /* 292 * xycmatch: determine if xyc is present or not. we do a 293 * soft reset to detect the xyc. 294 */ 295 int 296 xyc_probe(arg, tag, handle) 297 void *arg; 298 bus_space_tag_t tag; 299 bus_space_handle_t handle; 300 { 301 struct xyc *xyc = (void *)handle; /* XXX */ 302 303 return ((xyc_unbusy(xyc, XYC_RESETUSEC) != XY_ERR_FAIL) ? 0 : EIO); 304 } 305 306 int xycmatch(parent, cf, aux) 307 struct device *parent; 308 struct cfdata *cf; 309 void *aux; 310 { 311 struct vme_attach_args *va = aux; 312 vme_chipset_tag_t ct = va->va_vct; 313 vme_am_t mod; 314 int error; 315 316 mod = 0x2d; /* VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */ 317 if (vme_space_alloc(va->va_vct, va->r[0].offset, sizeof(struct xyc), 318 mod)) 319 return (0); 320 error = vme_probe(ct, va->r[0].offset, sizeof(struct xyc), 321 mod, VME_D32, xyc_probe, 0); 322 vme_space_free(va->va_vct, va->r[0].offset, sizeof(struct xyc), mod); 323 324 return (error == 0); 325 } 326 327 /* 328 * xycattach: attach controller 329 */ 330 void 331 xycattach(parent, self, aux) 332 struct device *parent, *self; 333 void *aux; 334 335 { 336 struct vme_attach_args *va = aux; 337 vme_chipset_tag_t ct = va->va_vct; 338 bus_space_tag_t bt; 339 bus_space_handle_t bh; 340 vme_intr_handle_t ih; 341 vme_am_t mod; 342 struct xyc_softc *xyc = (void *) self; 343 struct xyc_attach_args xa; 344 int lcv, res, pbsz, error; 345 bus_dma_segment_t seg; 346 int rseg; 347 vme_mapresc_t resc; 348 349 /* get addressing and intr level stuff from autoconfig and load it 350 * into our xyc_softc. */ 351 352 mod = 0x2d; /* VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */ 353 354 if (vme_space_alloc(va->va_vct, va->r[0].offset, sizeof(struct xyc), 355 mod)) 356 panic("xyc: vme alloc"); 357 if (vme_space_map(ct, va->r[0].offset, sizeof(struct xyc), 358 mod, VME_D32, 0, &bt, &bh, &resc) != 0) 359 panic("xyc: vme_map"); 360 361 xyc->xyc = (struct xyc *) bh; /* XXX */ 362 xyc->ipl = va->ilevel; 363 xyc->vector = va->ivector; 364 xyc->no_ols = 0; /* XXX should be from config */ 365 366 for (lcv = 0; lcv < XYC_MAXDEV; lcv++) 367 xyc->sc_drives[lcv] = (struct xy_softc *) 0; 368 369 /* 370 * allocate and zero buffers 371 * check boundaries of the KVA's ... all IOPBs must reside in 372 * the same 64K region. 373 */ 374 375 pbsz = XYC_MAXIOPB * sizeof(struct xy_iopb); 376 377 error = bus_dmamem_alloc( 378 xyc->dmatag, 379 pbsz, /* size */ 380 64*1024, /* boundary */ 381 0, /* alignment */ 382 &seg, 383 1, /* # of segments */ 384 &rseg, /* actual # of segments */ 385 BUS_DMA_NOWAIT); 386 if (error) { 387 printf("%s: DMA buffer map error %d\n", 388 xyc->sc_dev.dv_xname, error); 389 return; 390 } 391 xyc->dvmaiopb = (struct xy_iopb *)seg.ds_addr; 392 393 error = bus_dmamem_map( 394 xyc->dmatag, 395 &seg, 396 rseg, 397 XYC_MAXIOPB * sizeof(struct xy_iopb), 398 (caddr_t *)&xyc->iopbase, 399 BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 400 if (error) { 401 bus_dmamem_free(xyc->dmatag, &seg, rseg); 402 printf("%s: DMA buffer map error %d\n", 403 xyc->sc_dev.dv_xname, error); 404 return; 405 } 406 bzero(xyc->iopbase, pbsz); 407 408 xyc->reqs = (struct xy_iorq *) 409 malloc(XYC_MAXIOPB * sizeof(struct xy_iorq), M_DEVBUF, M_NOWAIT); 410 if (xyc->reqs == NULL) 411 panic("xyc malloc"); 412 bzero(xyc->reqs, XYC_MAXIOPB * sizeof(struct xy_iorq)); 413 414 /* 415 * init iorq to iopb pointers, and non-zero fields in the 416 * iopb which never change. 417 */ 418 419 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 420 xyc->xy_chain[lcv] = NULL; 421 xyc->reqs[lcv].iopb = &xyc->iopbase[lcv]; 422 xyc->reqs[lcv].dmaiopb = &xyc->dvmaiopb[lcv]; 423 xyc->iopbase[lcv].asr = 1; /* always the same */ 424 xyc->iopbase[lcv].eef = 1; /* always the same */ 425 xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */ 426 xyc->iopbase[lcv].aud = 1; /* always the same */ 427 xyc->iopbase[lcv].relo = 1; /* always the same */ 428 xyc->iopbase[lcv].thro = XY_THRO;/* always the same */ 429 430 error = bus_dmamap_create( 431 xyc->dmatag, 432 MAXPHYS, /* size */ 433 1, /* nsegments */ 434 MAXPHYS, /* maxsegsz */ 435 0, /* boundary */ 436 BUS_DMA_NOWAIT, 437 &xyc->reqs[lcv].dmamap); 438 if (error) { 439 printf("%s: DMA buffer map create error %d\n", 440 xyc->sc_dev.dv_xname, error); 441 return; 442 } 443 } 444 xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */ 445 xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */ 446 xyc->xy_hand = 0; 447 448 /* read controller parameters and insure we have a 450/451 */ 449 450 error = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL); 451 res = xyc->ciopb->ctyp; 452 XYC_DONE(xyc, error); 453 if (res != XYCT_450) { 454 if (error) 455 printf(": %s: ", xyc_e2str(error)); 456 printf(": doesn't identify as a 450/451\n"); 457 return; 458 } 459 printf(": Xylogics 450/451"); 460 if (xyc->no_ols) 461 printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */ 462 printf("\n"); 463 if (error) { 464 printf("%s: error: %s\n", xyc->sc_dev.dv_xname, 465 xyc_e2str(error)); 466 return; 467 } 468 if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) { 469 printf("%s: 24 bit addressing turned off\n", 470 xyc->sc_dev.dv_xname); 471 printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n"); 472 printf("to enable 24 bit mode and this driver\n"); 473 return; 474 } 475 476 /* link in interrupt with higher level software */ 477 vme_intr_map(ct, va->ivector, va->ilevel, &ih); 478 vme_intr_establish(ct, ih, IPL_BIO, xycintr, xyc); 479 evcnt_attach(&xyc->sc_dev, "intr", &xyc->sc_intrcnt); 480 481 callout_init(&xyc->sc_tick_ch); 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 callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc); 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 BUFQ_INIT(&xy->xyq); 558 559 xy->xyrq = &xyc->reqs[xa->driveno]; 560 561 } 562 xy->xy_drive = xa->driveno; 563 fmode = xa->fullmode; 564 xyc->sc_drives[xa->driveno] = xy; 565 566 /* if not booting, make sure we are the only process in the attach for 567 * this drive. if locked out, sleep on it. */ 568 569 if (!xa->booting) { 570 s = splbio(); 571 while (xy->state == XY_DRIVE_ATTACHING) { 572 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 573 splx(s); 574 return; 575 } 576 } 577 printf("%s at %s", 578 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 579 } 580 581 /* we now have control */ 582 xy->state = XY_DRIVE_ATTACHING; 583 newstate = XY_DRIVE_UNKNOWN; 584 585 buf = NULL; 586 error = bus_dmamem_alloc(xyc->dmatag, XYFM_BPS, NBPG, 0, 587 &seg, 1, &rseg, BUS_DMA_NOWAIT); 588 if (error) { 589 printf("%s: DMA buffer alloc error %d\n", 590 xy->sc_dev.dv_xname, error); 591 goto done; 592 } 593 dmaddr = (caddr_t)seg.ds_addr; 594 595 error = bus_dmamem_map(xyc->dmatag, &seg, rseg, XYFM_BPS, 596 &buf, 597 BUS_DMA_NOWAIT|BUS_DMA_COHERENT); 598 if (error) { 599 printf("%s: DMA buffer alloc error %d\n", 600 xy->sc_dev.dv_xname, error); 601 bus_dmamem_free(xyc->dmatag, &seg, rseg); 602 goto done; 603 } 604 605 606 /* first try and reset the drive */ 607 608 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 609 XYC_DONE(xyc, error); 610 if (error == XY_ERR_DNRY) { 611 printf(" drive %d: off-line\n", xa->driveno); 612 goto done; 613 } 614 if (error) { 615 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 616 goto done; 617 } 618 printf(" drive %d: ready", xa->driveno); 619 620 /* 621 * now set drive parameters (to semi-bogus values) so we can read the 622 * disk label. 623 */ 624 xy->pcyl = xy->ncyl = 1; 625 xy->acyl = 0; 626 xy->nhead = 1; 627 xy->nsect = 1; 628 xy->sectpercyl = 1; 629 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 630 xy->dkb.bt_bad[lcv].bt_cyl = 631 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 632 633 /* read disk label */ 634 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 635 xy->drive_type++) { 636 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 637 dmaddr, fmode); 638 XYC_DONE(xyc, error); 639 if (error == XY_ERR_AOK) break; 640 } 641 642 if (error != XY_ERR_AOK) { 643 printf("\n%s: reading disk label failed: %s\n", 644 xy->sc_dev.dv_xname, xyc_e2str(error)); 645 goto done; 646 } 647 printf(" (drive type %d)\n", xy->drive_type); 648 649 newstate = XY_DRIVE_NOLABEL; 650 651 xy->hw_spt = spt = 0; /* XXX needed ? */ 652 /* Attach the disk: must be before getdisklabel to malloc label */ 653 disk_attach(&xy->sc_dk); 654 655 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 656 goto done; 657 658 /* inform the user of what is up */ 659 printf("%s: <%s>, pcyl %d\n", xy->sc_dev.dv_xname, 660 buf, xy->pcyl); 661 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 662 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 663 xy->sc_dev.dv_xname, mb, xy->ncyl, xy->nhead, xy->nsect, 664 XYFM_BPS); 665 666 /* 667 * 450/451 stupidity: the drive type is encoded into the format 668 * of the disk. the drive type in the IOPB must match the drive 669 * type in the format, or you will not be able to do I/O to the 670 * disk (you get header not found errors). if you have two drives 671 * of different sizes that have the same drive type in their 672 * formatting then you are out of luck. 673 * 674 * this problem was corrected in the 753/7053. 675 */ 676 677 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 678 oxy = xyc->sc_drives[lcv]; 679 if (oxy == NULL || oxy == xy) continue; 680 if (oxy->drive_type != xy->drive_type) continue; 681 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 682 xy->nhead != oxy->nhead) { 683 printf("%s: %s and %s must be the same size!\n", 684 xyc->sc_dev.dv_xname, xy->sc_dev.dv_xname, 685 oxy->sc_dev.dv_xname); 686 panic("xy drive size mismatch"); 687 } 688 } 689 690 691 /* now set the real drive parameters! */ 692 693 blk = (xy->nsect - 1) + 694 ((xy->nhead - 1) * xy->nsect) + 695 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 696 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 697 XYC_DONE(xyc, error); 698 if (error) { 699 printf("%s: write drive size failed: %s\n", 700 xy->sc_dev.dv_xname, xyc_e2str(error)); 701 goto done; 702 } 703 newstate = XY_DRIVE_ONLINE; 704 705 /* 706 * read bad144 table. this table resides on the first sector of the 707 * last track of the disk (i.e. second cyl of "acyl" area). 708 */ 709 710 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 711 /* last cyl */ 712 (xy->nhead - 1) * xy->nsect; /* last head */ 713 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 714 dmaddr, fmode); 715 XYC_DONE(xyc, error); 716 if (error) { 717 printf("%s: reading bad144 failed: %s\n", 718 xy->sc_dev.dv_xname, xyc_e2str(error)); 719 goto done; 720 } 721 722 /* check dkbad for sanity */ 723 dkb = (struct dkbad *) buf; 724 for (lcv = 0; lcv < 126; lcv++) { 725 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 726 dkb->bt_bad[lcv].bt_cyl == 0) && 727 dkb->bt_bad[lcv].bt_trksec == 0xffff) 728 continue; /* blank */ 729 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 730 break; 731 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 732 break; 733 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 734 break; 735 } 736 if (lcv != 126) { 737 printf("%s: warning: invalid bad144 sector!\n", 738 xy->sc_dev.dv_xname); 739 } else { 740 bcopy(buf, &xy->dkb, XYFM_BPS); 741 } 742 743 dk_establish(&xy->sc_dk, &xy->sc_dev); /* XXX */ 744 745 done: 746 if (buf != NULL) { 747 bus_dmamem_unmap(xyc->dmatag, buf, XYFM_BPS); 748 bus_dmamem_free(xyc->dmatag, &seg, rseg); 749 } 750 751 xy->state = newstate; 752 if (!xa->booting) { 753 wakeup(&xy->state); 754 splx(s); 755 } 756 } 757 758 /* 759 * end of autoconfig functions 760 */ 761 762 /* 763 * { b , c } d e v s w f u n c t i o n s 764 */ 765 766 /* 767 * xyclose: close device 768 */ 769 int 770 xyclose(dev, flag, fmt, p) 771 dev_t dev; 772 int flag, fmt; 773 struct proc *p; 774 775 { 776 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 777 int part = DISKPART(dev); 778 779 /* clear mask bits */ 780 781 switch (fmt) { 782 case S_IFCHR: 783 xy->sc_dk.dk_copenmask &= ~(1 << part); 784 break; 785 case S_IFBLK: 786 xy->sc_dk.dk_bopenmask &= ~(1 << part); 787 break; 788 } 789 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 790 791 return 0; 792 } 793 794 /* 795 * xydump: crash dump system 796 */ 797 int 798 xydump(dev, blkno, va, size) 799 dev_t dev; 800 daddr_t blkno; 801 caddr_t va; 802 size_t size; 803 { 804 int unit, part; 805 struct xy_softc *xy; 806 807 unit = DISKUNIT(dev); 808 if (unit >= xy_cd.cd_ndevs) 809 return ENXIO; 810 part = DISKPART(dev); 811 812 xy = xy_cd.cd_devs[unit]; 813 814 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 815 'a' + part); 816 817 return ENXIO; 818 819 /* outline: globals: "dumplo" == sector number of partition to start 820 * dump at (convert to physical sector with partition table) 821 * "dumpsize" == size of dump in clicks "physmem" == size of physical 822 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 823 * physmem) 824 * 825 * dump a copy of physical memory to the dump device starting at sector 826 * "dumplo" in the swap partition (make sure > 0). map in pages as 827 * we go. use polled I/O. 828 * 829 * XXX how to handle NON_CONTIG? */ 830 831 } 832 833 /* 834 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 835 */ 836 int 837 xyioctl(dev, command, addr, flag, p) 838 dev_t dev; 839 u_long command; 840 caddr_t addr; 841 int flag; 842 struct proc *p; 843 844 { 845 struct xy_softc *xy; 846 struct xd_iocmd *xio; 847 int error, s, unit; 848 849 unit = DISKUNIT(dev); 850 851 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 852 return (ENXIO); 853 854 /* switch on ioctl type */ 855 856 switch (command) { 857 case DIOCSBAD: /* set bad144 info */ 858 if ((flag & FWRITE) == 0) 859 return EBADF; 860 s = splbio(); 861 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 862 splx(s); 863 return 0; 864 865 case DIOCGDINFO: /* get disk label */ 866 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 867 return 0; 868 869 case DIOCGPART: /* get partition info */ 870 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 871 ((struct partinfo *) addr)->part = 872 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 873 return 0; 874 875 case DIOCSDINFO: /* set disk label */ 876 if ((flag & FWRITE) == 0) 877 return EBADF; 878 error = setdisklabel(xy->sc_dk.dk_label, 879 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 880 xy->sc_dk.dk_cpulabel); 881 if (error == 0) { 882 if (xy->state == XY_DRIVE_NOLABEL) 883 xy->state = XY_DRIVE_ONLINE; 884 } 885 return error; 886 887 case DIOCWLABEL: /* change write status of disk label */ 888 if ((flag & FWRITE) == 0) 889 return EBADF; 890 if (*(int *) addr) 891 xy->flags |= XY_WLABEL; 892 else 893 xy->flags &= ~XY_WLABEL; 894 return 0; 895 896 case DIOCWDINFO: /* write disk label */ 897 if ((flag & FWRITE) == 0) 898 return EBADF; 899 error = setdisklabel(xy->sc_dk.dk_label, 900 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 901 xy->sc_dk.dk_cpulabel); 902 if (error == 0) { 903 if (xy->state == XY_DRIVE_NOLABEL) 904 xy->state = XY_DRIVE_ONLINE; 905 906 /* Simulate opening partition 0 so write succeeds. */ 907 xy->sc_dk.dk_openmask |= (1 << 0); 908 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 909 xystrategy, xy->sc_dk.dk_label, 910 xy->sc_dk.dk_cpulabel); 911 xy->sc_dk.dk_openmask = 912 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 913 } 914 return error; 915 916 case DIOSXDCMD: 917 xio = (struct xd_iocmd *) addr; 918 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 919 return (error); 920 return (xyc_ioctlcmd(xy, dev, xio)); 921 922 default: 923 return ENOTTY; 924 } 925 } 926 927 /* 928 * xyopen: open drive 929 */ 930 931 int 932 xyopen(dev, flag, fmt, p) 933 dev_t dev; 934 int flag, fmt; 935 struct proc *p; 936 { 937 int unit, part; 938 struct xy_softc *xy; 939 struct xyc_attach_args xa; 940 941 /* first, could it be a valid target? */ 942 943 unit = DISKUNIT(dev); 944 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 945 return (ENXIO); 946 part = DISKPART(dev); 947 948 /* do we need to attach the drive? */ 949 950 if (xy->state == XY_DRIVE_UNKNOWN) { 951 xa.driveno = xy->xy_drive; 952 xa.fullmode = XY_SUB_WAIT; 953 xa.booting = 0; 954 xyattach((struct device *) xy->parent, 955 (struct device *) xy, &xa); 956 if (xy->state == XY_DRIVE_UNKNOWN) { 957 return (EIO); 958 } 959 } 960 /* check for partition */ 961 962 if (part != RAW_PART && 963 (part >= xy->sc_dk.dk_label->d_npartitions || 964 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 965 return (ENXIO); 966 } 967 /* set open masks */ 968 969 switch (fmt) { 970 case S_IFCHR: 971 xy->sc_dk.dk_copenmask |= (1 << part); 972 break; 973 case S_IFBLK: 974 xy->sc_dk.dk_bopenmask |= (1 << part); 975 break; 976 } 977 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 978 979 return 0; 980 } 981 982 int 983 xyread(dev, uio, flags) 984 dev_t dev; 985 struct uio *uio; 986 int flags; 987 { 988 989 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 990 } 991 992 int 993 xywrite(dev, uio, flags) 994 dev_t dev; 995 struct uio *uio; 996 int flags; 997 { 998 999 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1000 } 1001 1002 1003 /* 1004 * xysize: return size of a partition for a dump 1005 */ 1006 1007 int 1008 xysize(dev) 1009 dev_t dev; 1010 1011 { 1012 struct xy_softc *xysc; 1013 int unit, part, size, omask; 1014 1015 /* valid unit? */ 1016 unit = DISKUNIT(dev); 1017 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1018 return (-1); 1019 1020 part = DISKPART(dev); 1021 omask = xysc->sc_dk.dk_openmask & (1 << part); 1022 1023 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1024 return (-1); 1025 1026 /* do it */ 1027 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1028 size = -1; /* only give valid size for swap partitions */ 1029 else 1030 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1031 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1032 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1033 return (-1); 1034 return (size); 1035 } 1036 1037 /* 1038 * xystrategy: buffering system interface to xy. 1039 */ 1040 1041 void 1042 xystrategy(bp) 1043 struct buf *bp; 1044 1045 { 1046 struct xy_softc *xy; 1047 int s, unit; 1048 struct xyc_attach_args xa; 1049 struct disklabel *lp; 1050 daddr_t blkno; 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 lp = xy->sc_dk.dk_label; 1090 1091 if (bounds_check_with_label(bp, lp, 1092 (xy->flags & XY_WLABEL) != 0) <= 0) 1093 goto done; 1094 1095 /* 1096 * Now convert the block number to absolute and put it in 1097 * terms of the device's logical block size. 1098 */ 1099 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1100 if (DISKPART(bp->b_dev) != RAW_PART) 1101 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1102 1103 bp->b_rawblkno = blkno; 1104 1105 /* 1106 * now we know we have a valid buf structure that we need to do I/O 1107 * on. 1108 */ 1109 s = splbio(); /* protect the queues */ 1110 1111 disksort_blkno(&xy->xyq, bp); 1112 1113 /* start 'em up */ 1114 1115 xyc_start(xy->parent, NULL); 1116 1117 /* done! */ 1118 1119 splx(s); 1120 return; 1121 1122 bad: /* tells upper layers we have an error */ 1123 bp->b_flags |= B_ERROR; 1124 done: /* tells upper layers we are done with this 1125 * buf */ 1126 bp->b_resid = bp->b_bcount; 1127 biodone(bp); 1128 } 1129 /* 1130 * end of {b,c}devsw functions 1131 */ 1132 1133 /* 1134 * i n t e r r u p t f u n c t i o n 1135 * 1136 * xycintr: hardware interrupt. 1137 */ 1138 int 1139 xycintr(v) 1140 void *v; 1141 1142 { 1143 struct xyc_softc *xycsc = v; 1144 1145 /* kick the event counter */ 1146 1147 xycsc->sc_intrcnt.ev_count++; 1148 1149 /* remove as many done IOPBs as possible */ 1150 1151 xyc_remove_iorq(xycsc); 1152 1153 /* start any iorq's already waiting */ 1154 1155 xyc_start(xycsc, NULL); 1156 1157 return (1); 1158 } 1159 /* 1160 * end of interrupt function 1161 */ 1162 1163 /* 1164 * i n t e r n a l f u n c t i o n s 1165 */ 1166 1167 /* 1168 * xyc_rqinit: fill out the fields of an I/O request 1169 */ 1170 1171 inline void 1172 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1173 struct xy_iorq *rq; 1174 struct xyc_softc *xyc; 1175 struct xy_softc *xy; 1176 int md; 1177 u_long blk; 1178 int cnt; 1179 caddr_t db; 1180 struct buf *bp; 1181 { 1182 rq->xyc = xyc; 1183 rq->xy = xy; 1184 rq->ttl = XYC_MAXTTL + 10; 1185 rq->mode = md; 1186 rq->tries = rq->errno = rq->lasterror = 0; 1187 rq->blockno = blk; 1188 rq->sectcnt = cnt; 1189 rq->dbuf = db; 1190 rq->buf = bp; 1191 } 1192 1193 /* 1194 * xyc_rqtopb: load up an IOPB based on an iorq 1195 */ 1196 1197 void 1198 xyc_rqtopb(iorq, iopb, cmd, subfun) 1199 struct xy_iorq *iorq; 1200 struct xy_iopb *iopb; 1201 int cmd, subfun; 1202 1203 { 1204 u_long block, dp; 1205 1206 /* normal IOPB case, standard stuff */ 1207 1208 /* chain bit handled later */ 1209 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1210 iopb->com = cmd; 1211 iopb->errno = 0; 1212 iopb->errs = 0; 1213 iopb->done = 0; 1214 if (iorq->xy) { 1215 iopb->unit = iorq->xy->xy_drive; 1216 iopb->dt = iorq->xy->drive_type; 1217 } else { 1218 iopb->unit = 0; 1219 iopb->dt = 0; 1220 } 1221 block = iorq->blockno; 1222 if (iorq->xy == NULL || block == 0) { 1223 iopb->sect = iopb->head = iopb->cyl = 0; 1224 } else { 1225 iopb->sect = block % iorq->xy->nsect; 1226 block = block / iorq->xy->nsect; 1227 iopb->head = block % iorq->xy->nhead; 1228 block = block / iorq->xy->nhead; 1229 iopb->cyl = block; 1230 } 1231 iopb->scnt = iorq->sectcnt; 1232 dp = (u_long) iorq->dbuf; 1233 if (iorq->dbuf == NULL) { 1234 iopb->dataa = 0; 1235 iopb->datar = 0; 1236 } else { 1237 iopb->dataa = (dp & 0xffff); 1238 iopb->datar = ((dp & 0xff0000) >> 16); 1239 } 1240 iopb->subfn = subfun; 1241 } 1242 1243 1244 /* 1245 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1246 */ 1247 1248 int 1249 xyc_unbusy(xyc, del) 1250 1251 struct xyc *xyc; 1252 int del; 1253 1254 { 1255 while (del-- > 0) { 1256 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1257 break; 1258 DELAY(1); 1259 } 1260 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1261 } 1262 1263 /* 1264 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1265 * note that NORM requests are handled seperately. 1266 */ 1267 int 1268 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1269 struct xyc_softc *xycsc; 1270 int cmd, subfn, unit, block, scnt; 1271 char *dptr; 1272 int fullmode; 1273 1274 { 1275 int submode = XY_STATE(fullmode); 1276 struct xy_iorq *iorq = xycsc->ciorq; 1277 struct xy_iopb *iopb = xycsc->ciopb; 1278 1279 /* 1280 * is someone else using the control iopq wait for it if we can 1281 */ 1282 start: 1283 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1284 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1285 return(XY_ERR_FAIL); 1286 goto start; 1287 } 1288 1289 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1290 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1291 iorq->mode = XY_SUB_FREE; 1292 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1293 } 1294 1295 /* init iorq/iopb */ 1296 1297 xyc_rqinit(iorq, xycsc, 1298 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1299 fullmode, block, scnt, dptr, NULL); 1300 1301 /* load IOPB from iorq */ 1302 1303 xyc_rqtopb(iorq, iopb, cmd, subfn); 1304 1305 /* submit it for processing */ 1306 1307 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1308 1309 return(XY_ERR_AOK); 1310 } 1311 1312 /* 1313 * xyc_startbuf 1314 * start a buffer for running 1315 */ 1316 1317 int 1318 xyc_startbuf(xycsc, xysc, bp) 1319 struct xyc_softc *xycsc; 1320 struct xy_softc *xysc; 1321 struct buf *bp; 1322 1323 { 1324 int partno, error; 1325 struct xy_iorq *iorq; 1326 struct xy_iopb *iopb; 1327 u_long block; 1328 1329 iorq = xysc->xyrq; 1330 iopb = iorq->iopb; 1331 1332 /* get buf */ 1333 1334 if (bp == NULL) 1335 panic("xyc_startbuf null buf"); 1336 1337 partno = DISKPART(bp->b_dev); 1338 #ifdef XYC_DEBUG 1339 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1340 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1341 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1342 bp->b_bcount, bp->b_data); 1343 #endif 1344 1345 /* 1346 * load request. 1347 * 1348 * note that iorq points to the buffer as mapped into DVMA space, 1349 * where as the bp->b_data points to its non-DVMA mapping. 1350 */ 1351 1352 block = bp->b_rawblkno; 1353 1354 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1355 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1356 if (error != 0) { 1357 printf("%s: warning: cannot load DMA map\n", 1358 xycsc->sc_dev.dv_xname); 1359 return (XY_ERR_FAIL); /* XXX: need some sort of 1360 * call-back scheme here? */ 1361 } 1362 1363 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1364 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1365 ? BUS_DMASYNC_PREREAD 1366 : BUS_DMASYNC_PREWRITE); 1367 1368 /* init iorq and load iopb from it */ 1369 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1370 bp->b_bcount / XYFM_BPS, 1371 (caddr_t)iorq->dmamap->dm_segs[0].ds_addr, 1372 bp); 1373 1374 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1375 1376 /* Instrumentation. */ 1377 disk_busy(&xysc->sc_dk); 1378 1379 return (XY_ERR_AOK); 1380 } 1381 1382 1383 /* 1384 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1385 * if ok. if it fail returns an error code. type is XY_SUB_*. 1386 * 1387 * note: caller frees iorq in all cases except NORM 1388 * 1389 * return value: 1390 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1391 * WAIT: XY_AOK (success), <error-code> (failed) 1392 * POLL: <same as WAIT> 1393 * NOQ : <same as NORM> 1394 * 1395 * there are three sources for i/o requests: 1396 * [1] xystrategy: normal block I/O, using "struct buf" system. 1397 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1398 * [3] open/ioctl: these are I/O requests done in the context of a process, 1399 * and the process should block until they are done. 1400 * 1401 * software state is stored in the iorq structure. each iorq has an 1402 * iopb structure. the hardware understands the iopb structure. 1403 * every command must go through an iopb. a 450 handles one iopb at a 1404 * time, where as a 451 can take them in chains. [the 450 claims it 1405 * can handle chains, but is appears to be buggy...] iopb are allocated 1406 * in DVMA space at boot up time. each disk gets one iopb, and the 1407 * controller gets one (for POLL and WAIT commands). what happens if 1408 * the iopb is busy? for i/o type [1], the buffers are queued at the 1409 * "buff" layer and * picked up later by the interrupt routine. for case 1410 * [2] we can only be blocked if there is a WAIT type I/O request being 1411 * run. since this can only happen when we are crashing, we wait a sec 1412 * and then steal the IOPB. for case [3] the process can sleep 1413 * on the iorq free list until some iopbs are avaliable. 1414 */ 1415 1416 1417 int 1418 xyc_submit_iorq(xycsc, iorq, type) 1419 struct xyc_softc *xycsc; 1420 struct xy_iorq *iorq; 1421 int type; 1422 1423 { 1424 struct xy_iopb *dmaiopb; 1425 1426 #ifdef XYC_DEBUG 1427 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1428 xycsc->sc_dev.dv_xname, iorq, type); 1429 #endif 1430 1431 /* first check and see if controller is busy */ 1432 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1433 #ifdef XYC_DEBUG 1434 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1435 #endif 1436 if (type == XY_SUB_NOQ) 1437 return (XY_ERR_FAIL); /* failed */ 1438 switch (type) { 1439 case XY_SUB_NORM: 1440 return XY_ERR_AOK; /* success */ 1441 case XY_SUB_WAIT: 1442 while (iorq->iopb->done == 0) { 1443 sleep(iorq, PRIBIO); 1444 } 1445 return (iorq->errno); 1446 case XY_SUB_POLL: /* steal controller */ 1447 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1448 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1449 panic("xyc_submit_iorq: stuck xyc"); 1450 printf("%s: stole controller\n", 1451 xycsc->sc_dev.dv_xname); 1452 break; 1453 default: 1454 panic("xyc_submit_iorq adding"); 1455 } 1456 } 1457 1458 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1459 if (dmaiopb == NULL) { /* nothing doing? */ 1460 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1461 return(XY_ERR_AOK); 1462 panic("xyc_submit_iorq: xyc_chain failed!\n"); 1463 } 1464 1465 XYC_GO(xycsc->xyc, (u_long)dmaiopb); 1466 1467 /* command now running, wrap it up */ 1468 switch (type) { 1469 case XY_SUB_NORM: 1470 case XY_SUB_NOQ: 1471 return (XY_ERR_AOK); /* success */ 1472 case XY_SUB_WAIT: 1473 while (iorq->iopb->done == 0) { 1474 sleep(iorq, PRIBIO); 1475 } 1476 return (iorq->errno); 1477 case XY_SUB_POLL: 1478 return (xyc_piodriver(xycsc, iorq)); 1479 default: 1480 panic("xyc_submit_iorq wrap up"); 1481 } 1482 panic("xyc_submit_iorq"); 1483 return 0; /* not reached */ 1484 } 1485 1486 1487 /* 1488 * xyc_chain: build a chain. return dvma address of first element in 1489 * the chain. iorq != NULL: means we only want that item on the chain. 1490 */ 1491 1492 struct xy_iopb * 1493 xyc_chain(xycsc, iorq) 1494 struct xyc_softc *xycsc; 1495 struct xy_iorq *iorq; 1496 1497 { 1498 int togo, chain, hand; 1499 1500 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1501 1502 /* 1503 * promote control IOPB to the top 1504 */ 1505 if (iorq == NULL) { 1506 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1507 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1508 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1509 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1510 } 1511 1512 /* 1513 * special case: if iorq != NULL then we have a POLL or WAIT request. 1514 * we let these take priority and do them first. 1515 */ 1516 if (iorq) { 1517 xycsc->xy_chain[0] = iorq; 1518 iorq->iopb->chen = 0; 1519 return(iorq->dmaiopb); 1520 } 1521 1522 /* 1523 * NORM case: do round robin and maybe chain (if allowed and possible) 1524 */ 1525 chain = 0; 1526 hand = xycsc->xy_hand; 1527 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1528 1529 for (togo = XYC_MAXIOPB; togo > 0; 1530 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1531 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1532 1533 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1534 xycsc->iopbase[hand].done) 1535 continue; /* not ready-for-i/o */ 1536 1537 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1538 iopb = xycsc->xy_chain[chain]->iopb; 1539 iopb->chen = 0; 1540 if (chain != 0) { 1541 /* adding a link to a chain */ 1542 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1543 prev_iopb->chen = 1; 1544 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1545 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1546 } else { 1547 /* head of chain */ 1548 iorq = xycsc->xy_chain[chain]; 1549 } 1550 chain++; 1551 1552 /* quit if chaining dis-allowed */ 1553 if (xycsc->no_ols) 1554 break; 1555 } 1556 1557 return(iorq ? iorq->dmaiopb : NULL); 1558 } 1559 1560 /* 1561 * xyc_piodriver 1562 * 1563 * programmed i/o driver. this function takes over the computer 1564 * and drains off the polled i/o request. it returns the status of the iorq 1565 * the caller is interesting in. 1566 */ 1567 int 1568 xyc_piodriver(xycsc, iorq) 1569 struct xyc_softc *xycsc; 1570 struct xy_iorq *iorq; 1571 1572 { 1573 int nreset = 0; 1574 int retval = 0; 1575 u_long res; 1576 #ifdef XYC_DEBUG 1577 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1578 #endif 1579 1580 while (iorq->iopb->done == 0) { 1581 1582 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1583 1584 /* we expect some progress soon */ 1585 if (res == XY_ERR_FAIL && nreset >= 2) { 1586 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1587 #ifdef XYC_DEBUG 1588 printf("xyc_piodriver: timeout\n"); 1589 #endif 1590 return (XY_ERR_FAIL); 1591 } 1592 if (res == XY_ERR_FAIL) { 1593 if (xyc_reset(xycsc, 0, 1594 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1595 XY_ERR_FAIL, 1596 0) == XY_ERR_FAIL) 1597 return (XY_ERR_FAIL); /* flushes all but POLL 1598 * requests, resets */ 1599 continue; 1600 } 1601 1602 xyc_remove_iorq(xycsc); /* may resubmit request */ 1603 1604 if (iorq->iopb->done == 0) 1605 xyc_start(xycsc, iorq); 1606 } 1607 1608 /* get return value */ 1609 1610 retval = iorq->errno; 1611 1612 #ifdef XYC_DEBUG 1613 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1614 iorq->errno, xyc_e2str(iorq->errno)); 1615 #endif 1616 1617 /* start up any bufs that have queued */ 1618 1619 xyc_start(xycsc, NULL); 1620 1621 return (retval); 1622 } 1623 1624 /* 1625 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1626 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1627 */ 1628 void 1629 xyc_xyreset(xycsc, xysc) 1630 struct xyc_softc *xycsc; 1631 struct xy_softc *xysc; 1632 1633 { 1634 struct xy_iopb tmpiopb; 1635 struct xy_iopb *iopb; 1636 int del; 1637 1638 iopb = xycsc->ciopb; 1639 1640 /* Save contents */ 1641 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1642 1643 iopb->chen = iopb->done = iopb->errs = 0; 1644 iopb->ien = 0; 1645 iopb->com = XYCMD_RST; 1646 iopb->unit = xysc->xy_drive; 1647 1648 XYC_GO(xycsc->xyc, (u_long)xycsc->ciorq->dmaiopb); 1649 1650 del = XYC_RESETUSEC; 1651 while (del > 0) { 1652 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1653 break; 1654 DELAY(1); 1655 del--; 1656 } 1657 1658 if (del <= 0 || iopb->errs) { 1659 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1660 xyc_e2str(iopb->errno)); 1661 del = xycsc->xyc->xyc_rsetup; 1662 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1663 panic("xyc_reset"); 1664 } else { 1665 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1666 } 1667 1668 /* Restore contents */ 1669 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1670 } 1671 1672 1673 /* 1674 * xyc_reset: reset everything: requests are marked as errors except 1675 * a polled request (which is resubmitted) 1676 */ 1677 int 1678 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1679 struct xyc_softc *xycsc; 1680 int quiet, error; 1681 struct xy_iorq *blastmode; 1682 struct xy_softc *xysc; 1683 1684 { 1685 int del = 0, lcv, retval = XY_ERR_AOK; 1686 1687 /* soft reset hardware */ 1688 1689 if (!quiet) 1690 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1691 del = xycsc->xyc->xyc_rsetup; 1692 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1693 if (del == XY_ERR_FAIL) { 1694 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1695 retval = XY_ERR_FAIL; 1696 } 1697 if (xysc) 1698 xyc_xyreset(xycsc, xysc); 1699 1700 /* fix queues based on "blast-mode" */ 1701 1702 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1703 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1704 1705 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1706 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1707 XY_STATE(iorq->mode) != XY_SUB_NORM) 1708 /* is it active? */ 1709 continue; 1710 1711 if (blastmode == XY_RSET_ALL || 1712 blastmode != iorq) { 1713 /* failed */ 1714 iorq->errno = error; 1715 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1716 switch (XY_STATE(iorq->mode)) { 1717 case XY_SUB_NORM: 1718 iorq->buf->b_error = EIO; 1719 iorq->buf->b_flags |= B_ERROR; 1720 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1721 1722 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1723 iorq->dmamap->dm_mapsize, 1724 (iorq->buf->b_flags & B_READ) 1725 ? BUS_DMASYNC_POSTREAD 1726 : BUS_DMASYNC_POSTWRITE); 1727 1728 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1729 1730 BUFQ_REMOVE(&iorq->xy->xyq, iorq->buf); 1731 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1732 (xycsc->reqs[lcv].buf->b_bcount - 1733 xycsc->reqs[lcv].buf->b_resid)); 1734 biodone(iorq->buf); 1735 iorq->mode = XY_SUB_FREE; 1736 break; 1737 case XY_SUB_WAIT: 1738 wakeup(iorq); 1739 case XY_SUB_POLL: 1740 iorq->mode = 1741 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1742 break; 1743 } 1744 1745 } else { 1746 1747 /* resubmit, no need to do anything here */ 1748 } 1749 } 1750 1751 /* 1752 * now, if stuff is waiting, start it. 1753 * since we just reset it should go 1754 */ 1755 xyc_start(xycsc, NULL); 1756 1757 return (retval); 1758 } 1759 1760 /* 1761 * xyc_start: start waiting buffers 1762 */ 1763 1764 void 1765 xyc_start(xycsc, iorq) 1766 struct xyc_softc *xycsc; 1767 struct xy_iorq *iorq; 1768 1769 { 1770 int lcv; 1771 struct xy_softc *xy; 1772 1773 if (iorq == NULL) { 1774 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1775 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1776 if (BUFQ_FIRST(&xy->xyq) == NULL) continue; 1777 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1778 xyc_startbuf(xycsc, xy, BUFQ_FIRST(&xy->xyq)); 1779 } 1780 } 1781 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1782 } 1783 1784 /* 1785 * xyc_remove_iorq: remove "done" IOPB's. 1786 */ 1787 1788 int 1789 xyc_remove_iorq(xycsc) 1790 struct xyc_softc *xycsc; 1791 1792 { 1793 int errno, rq, comm, errs; 1794 struct xyc *xyc = xycsc->xyc; 1795 u_long addr; 1796 struct xy_iopb *iopb; 1797 struct xy_iorq *iorq; 1798 struct buf *bp; 1799 1800 if (xyc->xyc_csr & XYC_DERR) { 1801 /* 1802 * DOUBLE ERROR: should never happen under normal use. This 1803 * error is so bad, you can't even tell which IOPB is bad, so 1804 * we dump them all. 1805 */ 1806 errno = XY_ERR_DERR; 1807 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1808 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1809 printf("%s: soft reset failed!\n", 1810 xycsc->sc_dev.dv_xname); 1811 panic("xyc_remove_iorq: controller DEAD"); 1812 } 1813 return (XY_ERR_AOK); 1814 } 1815 1816 /* 1817 * get iopb that is done, loop down the chain 1818 */ 1819 1820 if (xyc->xyc_csr & XYC_ERR) { 1821 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1822 } 1823 if (xyc->xyc_csr & XYC_IPND) { 1824 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1825 } 1826 1827 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1828 iorq = xycsc->xy_chain[rq]; 1829 if (iorq == NULL) break; /* done ! */ 1830 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1831 continue; /* free, or done */ 1832 iopb = iorq->iopb; 1833 if (iopb->done == 0) 1834 continue; /* not done yet */ 1835 1836 comm = iopb->com; 1837 errs = iopb->errs; 1838 1839 if (errs) 1840 iorq->errno = iopb->errno; 1841 else 1842 iorq->errno = 0; 1843 1844 /* handle non-fatal errors */ 1845 1846 if (errs && 1847 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1848 continue; /* AOK: we resubmitted it */ 1849 1850 1851 /* this iorq is now done (hasn't been restarted or anything) */ 1852 1853 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1854 xyc_perror(iorq, iopb, 0); 1855 1856 /* now, if read/write check to make sure we got all the data 1857 * we needed. (this may not be the case if we got an error in 1858 * the middle of a multisector request). */ 1859 1860 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1861 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1862 /* we just successfully processed a bad144 sector 1863 * note: if we are in bad 144 mode, the pointers have 1864 * been advanced already (see above) and are pointing 1865 * at the bad144 sector. to exit bad144 mode, we 1866 * must advance the pointers 1 sector and issue a new 1867 * request if there are still sectors left to process 1868 * 1869 */ 1870 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1871 1872 /* exit b144 mode */ 1873 iorq->mode = iorq->mode & (~XY_MODE_B144); 1874 1875 if (iorq->sectcnt) { /* more to go! */ 1876 iorq->lasterror = iorq->errno = iopb->errno = 0; 1877 iopb->errs = iopb->done = 0; 1878 iorq->tries = 0; 1879 iopb->scnt = iorq->sectcnt; 1880 iopb->cyl = iorq->blockno / 1881 iorq->xy->sectpercyl; 1882 iopb->head = 1883 (iorq->blockno / iorq->xy->nhead) % 1884 iorq->xy->nhead; 1885 iopb->sect = iorq->blockno % XYFM_BPS; 1886 addr = (u_long) iorq->dbuf; 1887 iopb->dataa = (addr & 0xffff); 1888 iopb->datar = ((addr & 0xff0000) >> 16); 1889 /* will resubit at end */ 1890 continue; 1891 } 1892 } 1893 /* final cleanup, totally done with this request */ 1894 1895 switch (XY_STATE(iorq->mode)) { 1896 case XY_SUB_NORM: 1897 bp = iorq->buf; 1898 if (errs) { 1899 bp->b_error = EIO; 1900 bp->b_flags |= B_ERROR; 1901 bp->b_resid = iorq->sectcnt * XYFM_BPS; 1902 } else { 1903 bp->b_resid = 0; /* done */ 1904 } 1905 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1906 iorq->dmamap->dm_mapsize, 1907 (iorq->buf->b_flags & B_READ) 1908 ? BUS_DMASYNC_POSTREAD 1909 : BUS_DMASYNC_POSTWRITE); 1910 1911 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1912 1913 BUFQ_REMOVE(&iorq->xy->xyq, bp); 1914 disk_unbusy(&iorq->xy->sc_dk, 1915 (bp->b_bcount - bp->b_resid)); 1916 iorq->mode = XY_SUB_FREE; 1917 biodone(bp); 1918 break; 1919 case XY_SUB_WAIT: 1920 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1921 wakeup(iorq); 1922 break; 1923 case XY_SUB_POLL: 1924 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1925 break; 1926 } 1927 } 1928 1929 return (XY_ERR_AOK); 1930 } 1931 1932 /* 1933 * xyc_perror: print error. 1934 * - if still_trying is true: we got an error, retried and got a 1935 * different error. in that case lasterror is the old error, 1936 * and errno is the new one. 1937 * - if still_trying is not true, then if we ever had an error it 1938 * is in lasterror. also, if iorq->errno == 0, then we recovered 1939 * from that error (otherwise iorq->errno == iorq->lasterror). 1940 */ 1941 void 1942 xyc_perror(iorq, iopb, still_trying) 1943 struct xy_iorq *iorq; 1944 struct xy_iopb *iopb; 1945 int still_trying; 1946 1947 { 1948 1949 int error = iorq->lasterror; 1950 1951 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 1952 : iorq->xyc->sc_dev.dv_xname); 1953 if (iorq->buf) 1954 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 1955 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 1956 printf("%s %d/%d/%d: ", 1957 (iopb->com == XYCMD_RD) ? "read" : "write", 1958 iopb->cyl, iopb->head, iopb->sect); 1959 printf("%s", xyc_e2str(error)); 1960 1961 if (still_trying) 1962 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 1963 else 1964 if (iorq->errno == 0) 1965 printf(" [recovered in %d tries]", iorq->tries); 1966 1967 printf("\n"); 1968 } 1969 1970 /* 1971 * xyc_error: non-fatal error encountered... recover. 1972 * return AOK if resubmitted, return FAIL if this iopb is done 1973 */ 1974 int 1975 xyc_error(xycsc, iorq, iopb, comm) 1976 struct xyc_softc *xycsc; 1977 struct xy_iorq *iorq; 1978 struct xy_iopb *iopb; 1979 int comm; 1980 1981 { 1982 int errno = iorq->errno; 1983 int erract = xyc_entoact(errno); 1984 int oldmode, advance; 1985 #ifdef __sparc__ 1986 int i; 1987 #endif 1988 1989 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 1990 oldmode = iorq->mode; 1991 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 1992 /* make xyc_start ignore us */ 1993 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 1994 iorq->mode = oldmode; 1995 } 1996 /* check for read/write to a sector in bad144 table if bad: redirect 1997 * request to bad144 area */ 1998 1999 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2000 (iorq->mode & XY_MODE_B144) == 0) { 2001 advance = iorq->sectcnt - iopb->scnt; 2002 XYC_ADVANCE(iorq, advance); 2003 #ifdef __sparc__ 2004 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2005 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2006 iorq->blockno % iorq->xy->nsect)) != -1) { 2007 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2008 * redirect */ 2009 iopb->errno = iopb->done = iopb->errs = 0; 2010 iopb->scnt = 1; 2011 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2012 /* second to last acyl */ 2013 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2014 * standard */ 2015 iopb->head = i / iorq->xy->nhead; 2016 iopb->sect = i % iorq->xy->nhead; 2017 /* will resubmit when we come out of remove_iorq */ 2018 return (XY_ERR_AOK); /* recovered! */ 2019 } 2020 #endif 2021 } 2022 2023 /* 2024 * it isn't a bad144 sector, must be real error! see if we can retry 2025 * it? 2026 */ 2027 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2028 xyc_perror(iorq, iopb, 1); /* inform of error state 2029 * change */ 2030 iorq->lasterror = errno; 2031 2032 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2033 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2034 iorq->tries++; 2035 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 2036 /* will resubmit at end of remove_iorq */ 2037 return (XY_ERR_AOK); /* recovered! */ 2038 } 2039 2040 /* failed to recover from this error */ 2041 return (XY_ERR_FAIL); 2042 } 2043 2044 /* 2045 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2046 */ 2047 void 2048 xyc_tick(arg) 2049 void *arg; 2050 2051 { 2052 struct xyc_softc *xycsc = arg; 2053 int lcv, s, reset = 0; 2054 2055 /* reduce ttl for each request if one goes to zero, reset xyc */ 2056 s = splbio(); 2057 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2058 if (xycsc->reqs[lcv].mode == 0 || 2059 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2060 continue; 2061 xycsc->reqs[lcv].ttl--; 2062 if (xycsc->reqs[lcv].ttl == 0) 2063 reset = 1; 2064 } 2065 if (reset) { 2066 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2067 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2068 } 2069 splx(s); 2070 2071 /* until next time */ 2072 2073 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2074 } 2075 2076 /* 2077 * xyc_ioctlcmd: this function provides a user level interface to the 2078 * controller via ioctl. this allows "format" programs to be written 2079 * in user code, and is also useful for some debugging. we return 2080 * an error code. called at user priority. 2081 * 2082 * XXX missing a few commands (see the 7053 driver for ideas) 2083 */ 2084 int 2085 xyc_ioctlcmd(xy, dev, xio) 2086 struct xy_softc *xy; 2087 dev_t dev; 2088 struct xd_iocmd *xio; 2089 2090 { 2091 int s, rqno, dummy = 0; 2092 caddr_t dvmabuf = NULL, buf = NULL; 2093 struct xyc_softc *xycsc; 2094 int rseg, error; 2095 bus_dma_segment_t seg; 2096 2097 /* check sanity of requested command */ 2098 2099 switch (xio->cmd) { 2100 2101 case XYCMD_NOP: /* no op: everything should be zero */ 2102 if (xio->subfn || xio->dptr || xio->dlen || 2103 xio->block || xio->sectcnt) 2104 return (EINVAL); 2105 break; 2106 2107 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2108 case XYCMD_WR: 2109 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2110 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2111 return (EINVAL); 2112 break; 2113 2114 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2115 return (EINVAL); 2116 2117 break; 2118 2119 default: 2120 return (EINVAL);/* ??? */ 2121 } 2122 2123 xycsc = xy->parent; 2124 2125 /* create DVMA buffer for request if needed */ 2126 if (xio->dlen) { 2127 error = bus_dmamem_alloc(xycsc->dmatag, xio->dlen, NBPG, 0, 2128 &seg, 1, &rseg, BUS_DMA_WAITOK); 2129 if (error) { 2130 return (error); 2131 } 2132 dvmabuf = (caddr_t)seg.ds_addr; 2133 2134 error = bus_dmamem_map(xycsc->dmatag, &seg, rseg, xio->dlen, 2135 &buf, 2136 BUS_DMA_WAITOK|BUS_DMA_COHERENT); 2137 if (error) { 2138 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2139 return (error); 2140 } 2141 if (xio->cmd == XYCMD_WR) { 2142 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2143 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2144 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2145 return (error); 2146 } 2147 } 2148 } 2149 /* do it! */ 2150 2151 error = 0; 2152 s = splbio(); 2153 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2154 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2155 if (rqno == XY_ERR_FAIL) { 2156 error = EIO; 2157 goto done; 2158 } 2159 xio->errno = xycsc->ciorq->errno; 2160 xio->tries = xycsc->ciorq->tries; 2161 XYC_DONE(xycsc, dummy); 2162 2163 if (xio->cmd == XYCMD_RD) 2164 error = copyout(buf, xio->dptr, xio->dlen); 2165 2166 done: 2167 splx(s); 2168 if (dvmabuf) { 2169 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2170 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2171 } 2172 return (error); 2173 } 2174 2175 /* 2176 * xyc_e2str: convert error code number into an error string 2177 */ 2178 char * 2179 xyc_e2str(no) 2180 int no; 2181 { 2182 switch (no) { 2183 case XY_ERR_FAIL: 2184 return ("Software fatal error"); 2185 case XY_ERR_DERR: 2186 return ("DOUBLE ERROR"); 2187 case XY_ERR_AOK: 2188 return ("Successful completion"); 2189 case XY_ERR_IPEN: 2190 return("Interrupt pending"); 2191 case XY_ERR_BCFL: 2192 return("Busy conflict"); 2193 case XY_ERR_TIMO: 2194 return("Operation timeout"); 2195 case XY_ERR_NHDR: 2196 return("Header not found"); 2197 case XY_ERR_HARD: 2198 return("Hard ECC error"); 2199 case XY_ERR_ICYL: 2200 return("Illegal cylinder address"); 2201 case XY_ERR_ISEC: 2202 return("Illegal sector address"); 2203 case XY_ERR_SMAL: 2204 return("Last sector too small"); 2205 case XY_ERR_SACK: 2206 return("Slave ACK error (non-existent memory)"); 2207 case XY_ERR_CHER: 2208 return("Cylinder and head/header error"); 2209 case XY_ERR_SRTR: 2210 return("Auto-seek retry successful"); 2211 case XY_ERR_WPRO: 2212 return("Write-protect error"); 2213 case XY_ERR_UIMP: 2214 return("Unimplemented command"); 2215 case XY_ERR_DNRY: 2216 return("Drive not ready"); 2217 case XY_ERR_SZER: 2218 return("Sector count zero"); 2219 case XY_ERR_DFLT: 2220 return("Drive faulted"); 2221 case XY_ERR_ISSZ: 2222 return("Illegal sector size"); 2223 case XY_ERR_SLTA: 2224 return("Self test A"); 2225 case XY_ERR_SLTB: 2226 return("Self test B"); 2227 case XY_ERR_SLTC: 2228 return("Self test C"); 2229 case XY_ERR_SOFT: 2230 return("Soft ECC error"); 2231 case XY_ERR_SFOK: 2232 return("Soft ECC error recovered"); 2233 case XY_ERR_IHED: 2234 return("Illegal head"); 2235 case XY_ERR_DSEQ: 2236 return("Disk sequencer error"); 2237 case XY_ERR_SEEK: 2238 return("Seek error"); 2239 default: 2240 return ("Unknown error"); 2241 } 2242 } 2243 2244 int 2245 xyc_entoact(errno) 2246 2247 int errno; 2248 2249 { 2250 switch (errno) { 2251 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2252 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2253 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2254 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2255 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2256 2257 return(XY_ERA_PROG); /* program error ! */ 2258 2259 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2260 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2261 case XY_ERR_SOFT: 2262 2263 return(XY_ERA_HARD); /* hard error, retry */ 2264 2265 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2266 2267 return(XY_ERA_RSET); /* hard error reset */ 2268 2269 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2270 2271 return(XY_ERA_SOFT); /* an FYI error */ 2272 2273 case XY_ERR_WPRO: 2274 2275 return(XY_ERA_WPRO); /* write protect */ 2276 } 2277 2278 return(XY_ERA_PROG); /* ??? */ 2279 } 2280
Indexes created Tue Sep 30 20:09:53 GMT 2025