xy.c revision 1.19
1 /* $NetBSD: xy.c,v 1.19 2000/05/09 22:51:34 pk 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 int xy_dmamem_alloc(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 174 int *, bus_size_t, caddr_t *, bus_addr_t *); 175 void xy_dmamem_free(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 176 int, bus_size_t, caddr_t); 177 178 /* machine interrupt hook */ 179 int xycintr __P((void *)); 180 181 /* autoconf */ 182 int xycmatch __P((struct device *, struct cfdata *, void *)); 183 void xycattach __P((struct device *, struct device *, void *)); 184 int xymatch __P((struct device *, struct cfdata *, void *)); 185 void xyattach __P((struct device *, struct device *, void *)); 186 static int xyc_probe __P((void *, bus_space_tag_t, bus_space_handle_t)); 187 188 static void xydummystrat __P((struct buf *)); 189 int xygetdisklabel __P((struct xy_softc *, void *)); 190 191 bdev_decl(xy); 192 cdev_decl(xy); 193 194 /* 195 * cfattach's: device driver interface to autoconfig 196 */ 197 198 struct cfattach xyc_ca = { 199 sizeof(struct xyc_softc), xycmatch, xycattach 200 }; 201 202 struct cfattach xy_ca = { 203 sizeof(struct xy_softc), xymatch, xyattach 204 }; 205 206 extern struct cfdriver xy_cd; 207 208 struct xyc_attach_args { /* this is the "aux" args to xyattach */ 209 int driveno; /* unit number */ 210 int fullmode; /* submit mode */ 211 int booting; /* are we booting or not? */ 212 }; 213 214 /* 215 * dkdriver 216 */ 217 218 struct dkdriver xydkdriver = { xystrategy }; 219 220 /* 221 * start: disk label fix code (XXX) 222 */ 223 224 static void *xy_labeldata; 225 226 static void 227 xydummystrat(bp) 228 struct buf *bp; 229 { 230 if (bp->b_bcount != XYFM_BPS) 231 panic("xydummystrat"); 232 bcopy(xy_labeldata, bp->b_un.b_addr, XYFM_BPS); 233 bp->b_flags |= B_DONE; 234 bp->b_flags &= ~B_BUSY; 235 } 236 237 int 238 xygetdisklabel(xy, b) 239 struct xy_softc *xy; 240 void *b; 241 { 242 char *err; 243 #if defined(__sparc__) || defined(__sun3__) 244 struct sun_disklabel *sdl; 245 #endif 246 247 /* We already have the label data in `b'; setup for dummy strategy */ 248 xy_labeldata = b; 249 250 /* Required parameter for readdisklabel() */ 251 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; 252 253 err = readdisklabel(MAKEDISKDEV(0, xy->sc_dev.dv_unit, RAW_PART), 254 xydummystrat, 255 xy->sc_dk.dk_label, xy->sc_dk.dk_cpulabel); 256 if (err) { 257 printf("%s: %s\n", xy->sc_dev.dv_xname, err); 258 return(XY_ERR_FAIL); 259 } 260 261 #if defined(__sparc__) || defined(__sun3__) 262 /* Ok, we have the label; fill in `pcyl' if there's SunOS magic */ 263 sdl = (struct sun_disklabel *)xy->sc_dk.dk_cpulabel->cd_block; 264 if (sdl->sl_magic == SUN_DKMAGIC) { 265 xy->pcyl = sdl->sl_pcylinders; 266 } else 267 #endif 268 { 269 printf("%s: WARNING: no `pcyl' in disk label.\n", 270 xy->sc_dev.dv_xname); 271 xy->pcyl = xy->sc_dk.dk_label->d_ncylinders + 272 xy->sc_dk.dk_label->d_acylinders; 273 printf("%s: WARNING: guessing pcyl=%d (ncyl+acyl)\n", 274 xy->sc_dev.dv_xname, xy->pcyl); 275 } 276 277 xy->ncyl = xy->sc_dk.dk_label->d_ncylinders; 278 xy->acyl = xy->sc_dk.dk_label->d_acylinders; 279 xy->nhead = xy->sc_dk.dk_label->d_ntracks; 280 xy->nsect = xy->sc_dk.dk_label->d_nsectors; 281 xy->sectpercyl = xy->nhead * xy->nsect; 282 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; /* not handled by 283 * sun->bsd */ 284 return(XY_ERR_AOK); 285 } 286 287 /* 288 * end: disk label fix code (XXX) 289 */ 290 291 /* 292 * Shorthand for allocating, mapping and loading a DMA buffer 293 */ 294 int 295 xy_dmamem_alloc(tag, map, seg, nsegp, len, kvap, dmap) 296 bus_dma_tag_t tag; 297 bus_dmamap_t map; 298 bus_dma_segment_t *seg; 299 int *nsegp; 300 bus_size_t len; 301 caddr_t *kvap; 302 bus_addr_t *dmap; 303 { 304 int nseg; 305 int error; 306 307 if ((error = bus_dmamem_alloc(tag, len, NBPG, 0, 308 seg, 1, &nseg, BUS_DMA_NOWAIT)) != 0) { 309 return (error); 310 } 311 312 if ((error = bus_dmamap_load_raw(tag, map, 313 seg, nseg, len, BUS_DMA_NOWAIT)) != 0) { 314 bus_dmamem_free(tag, seg, nseg); 315 return (error); 316 } 317 318 if ((error = bus_dmamem_map(tag, seg, nseg, 319 len, kvap, 320 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 321 bus_dmamap_unload(tag, map); 322 bus_dmamem_free(tag, seg, nseg); 323 return (error); 324 } 325 326 *dmap = map->dm_segs[0].ds_addr; 327 *nsegp = nseg; 328 return (0); 329 } 330 331 void 332 xy_dmamem_free(tag, map, seg, nseg, len, kva) 333 bus_dma_tag_t tag; 334 bus_dmamap_t map; 335 bus_dma_segment_t *seg; 336 int nseg; 337 bus_size_t len; 338 caddr_t kva; 339 { 340 341 bus_dmamap_unload(tag, map); 342 bus_dmamem_unmap(tag, kva, len); 343 bus_dmamem_free(tag, seg, nseg); 344 } 345 346 347 /* 348 * a u t o c o n f i g f u n c t i o n s 349 */ 350 351 /* 352 * xycmatch: determine if xyc is present or not. we do a 353 * soft reset to detect the xyc. 354 */ 355 int 356 xyc_probe(arg, tag, handle) 357 void *arg; 358 bus_space_tag_t tag; 359 bus_space_handle_t handle; 360 { 361 struct xyc *xyc = (void *)handle; /* XXX */ 362 363 return ((xyc_unbusy(xyc, XYC_RESETUSEC) != XY_ERR_FAIL) ? 0 : EIO); 364 } 365 366 int xycmatch(parent, cf, aux) 367 struct device *parent; 368 struct cfdata *cf; 369 void *aux; 370 { 371 struct vme_attach_args *va = aux; 372 vme_chipset_tag_t ct = va->va_vct; 373 vme_am_t mod; 374 int error; 375 376 mod = 0x2d; /* VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */ 377 if (vme_space_alloc(va->va_vct, va->r[0].offset, sizeof(struct xyc), 378 mod)) 379 return (0); 380 error = vme_probe(ct, va->r[0].offset, sizeof(struct xyc), 381 mod, VME_D32, xyc_probe, 0); 382 vme_space_free(va->va_vct, va->r[0].offset, sizeof(struct xyc), mod); 383 384 return (error == 0); 385 } 386 387 /* 388 * xycattach: attach controller 389 */ 390 void 391 xycattach(parent, self, aux) 392 struct device *parent, *self; 393 void *aux; 394 395 { 396 struct vme_attach_args *va = aux; 397 vme_chipset_tag_t ct = va->va_vct; 398 bus_space_tag_t bt; 399 bus_space_handle_t bh; 400 vme_intr_handle_t ih; 401 vme_am_t mod; 402 struct xyc_softc *xyc = (void *) self; 403 struct xyc_attach_args xa; 404 int lcv, res, error; 405 bus_dma_segment_t seg; 406 int rseg; 407 vme_mapresc_t resc; 408 409 /* get addressing and intr level stuff from autoconfig and load it 410 * into our xyc_softc. */ 411 412 mod = 0x2d; /* VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */ 413 414 if (vme_space_alloc(va->va_vct, va->r[0].offset, sizeof(struct xyc), 415 mod)) 416 panic("xyc: vme alloc"); 417 if (vme_space_map(ct, va->r[0].offset, sizeof(struct xyc), 418 mod, VME_D32, 0, &bt, &bh, &resc) != 0) 419 panic("xyc: vme_map"); 420 421 xyc->xyc = (struct xyc *) bh; /* XXX */ 422 xyc->ipl = va->ilevel; 423 xyc->vector = va->ivector; 424 xyc->no_ols = 0; /* XXX should be from config */ 425 426 for (lcv = 0; lcv < XYC_MAXDEV; lcv++) 427 xyc->sc_drives[lcv] = (struct xy_softc *) 0; 428 429 /* 430 * allocate and zero buffers 431 * check boundaries of the KVA's ... all IOPBs must reside in 432 * the same 64K region. 433 */ 434 435 /* Get DMA handle for misc. transfers */ 436 if ((error = bus_dmamap_create( 437 xyc->dmatag, 438 MAXPHYS, 439 1, /* nsegments */ 440 MAXPHYS, 441 0, /* boundary */ 442 BUS_DMA_NOWAIT, 443 &xyc->auxmap)) != 0) { 444 printf("%s: DMA buffer map create error %d\n", 445 xyc->sc_dev.dv_xname, error); 446 return; 447 } 448 449 /* Get DMA handle for mapping iorq descriptors */ 450 if ((error = bus_dmamap_create( 451 xyc->dmatag, 452 XYC_MAXIOPB * sizeof(struct xy_iopb), 453 1, /* nsegments */ 454 XYC_MAXIOPB * sizeof(struct xy_iopb), 455 64*1024, /* boundary */ 456 BUS_DMA_NOWAIT, 457 &xyc->iopmap)) != 0) { 458 printf("%s: DMA buffer map create error %d\n", 459 xyc->sc_dev.dv_xname, error); 460 return; 461 } 462 463 /* Get DMA buffer for iorq descriptors */ 464 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->iopmap, &seg, &rseg, 465 XYC_MAXIOPB * sizeof(struct xy_iopb), 466 (caddr_t *)&xyc->iopbase, 467 (bus_addr_t *)&xyc->dvmaiopb)) != 0) { 468 printf("%s: DMA buffer alloc error %d\n", 469 xyc->sc_dev.dv_xname, error); 470 return; 471 } 472 473 bzero(xyc->iopbase, XYC_MAXIOPB * sizeof(struct xy_iopb)); 474 475 xyc->reqs = (struct xy_iorq *) 476 malloc(XYC_MAXIOPB * sizeof(struct xy_iorq), M_DEVBUF, M_NOWAIT); 477 if (xyc->reqs == NULL) 478 panic("xyc malloc"); 479 bzero(xyc->reqs, XYC_MAXIOPB * sizeof(struct xy_iorq)); 480 481 /* 482 * init iorq to iopb pointers, and non-zero fields in the 483 * iopb which never change. 484 */ 485 486 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 487 xyc->xy_chain[lcv] = NULL; 488 xyc->reqs[lcv].iopb = &xyc->iopbase[lcv]; 489 xyc->reqs[lcv].dmaiopb = &xyc->dvmaiopb[lcv]; 490 xyc->iopbase[lcv].asr = 1; /* always the same */ 491 xyc->iopbase[lcv].eef = 1; /* always the same */ 492 xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */ 493 xyc->iopbase[lcv].aud = 1; /* always the same */ 494 xyc->iopbase[lcv].relo = 1; /* always the same */ 495 xyc->iopbase[lcv].thro = XY_THRO;/* always the same */ 496 497 error = bus_dmamap_create( 498 xyc->dmatag, 499 MAXPHYS, /* size */ 500 1, /* nsegments */ 501 MAXPHYS, /* maxsegsz */ 502 0, /* boundary */ 503 BUS_DMA_NOWAIT, 504 &xyc->reqs[lcv].dmamap); 505 if (error) { 506 printf("%s: DMA buffer map create error %d\n", 507 xyc->sc_dev.dv_xname, error); 508 return; 509 } 510 } 511 xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */ 512 xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */ 513 xyc->xy_hand = 0; 514 515 /* read controller parameters and insure we have a 450/451 */ 516 517 error = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL); 518 res = xyc->ciopb->ctyp; 519 XYC_DONE(xyc, error); 520 if (res != XYCT_450) { 521 if (error) 522 printf(": %s: ", xyc_e2str(error)); 523 printf(": doesn't identify as a 450/451\n"); 524 return; 525 } 526 printf(": Xylogics 450/451"); 527 if (xyc->no_ols) 528 printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */ 529 printf("\n"); 530 if (error) { 531 printf("%s: error: %s\n", xyc->sc_dev.dv_xname, 532 xyc_e2str(error)); 533 return; 534 } 535 if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) { 536 printf("%s: 24 bit addressing turned off\n", 537 xyc->sc_dev.dv_xname); 538 printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n"); 539 printf("to enable 24 bit mode and this driver\n"); 540 return; 541 } 542 543 /* link in interrupt with higher level software */ 544 vme_intr_map(ct, va->ivector, va->ilevel, &ih); 545 vme_intr_establish(ct, ih, IPL_BIO, xycintr, xyc); 546 evcnt_attach(&xyc->sc_dev, "intr", &xyc->sc_intrcnt); 547 548 callout_init(&xyc->sc_tick_ch); 549 550 /* now we must look for disks using autoconfig */ 551 xa.fullmode = XY_SUB_POLL; 552 xa.booting = 1; 553 554 for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++) 555 (void) config_found(self, (void *) &xa, NULL); 556 557 /* start the watchdog clock */ 558 callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc); 559 560 } 561 562 /* 563 * xymatch: probe for disk. 564 * 565 * note: we almost always say disk is present. this allows us to 566 * spin up and configure a disk after the system is booted (we can 567 * call xyattach!). 568 */ 569 int 570 xymatch(parent, cf, aux) 571 struct device *parent; 572 struct cfdata *cf; 573 void *aux; 574 { 575 struct xyc_attach_args *xa = aux; 576 577 /* looking for autoconf wildcard or exact match */ 578 579 if (cf->cf_loc[XYCCF_DRIVE] != XYCCF_DRIVE_DEFAULT && 580 cf->cf_loc[XYCCF_DRIVE] != xa->driveno) 581 return 0; 582 583 return 1; 584 585 } 586 587 /* 588 * xyattach: attach a disk. this can be called from autoconf and also 589 * from xyopen/xystrategy. 590 */ 591 void 592 xyattach(parent, self, aux) 593 struct device *parent, *self; 594 void *aux; 595 596 { 597 struct xy_softc *xy = (void *) self, *oxy; 598 struct xyc_softc *xyc = (void *) parent; 599 struct xyc_attach_args *xa = aux; 600 int spt, mb, blk, lcv, fmode, s = 0, newstate; 601 struct dkbad *dkb; 602 int rseg, error; 603 bus_dma_segment_t seg; 604 caddr_t dmaddr; 605 caddr_t buf; 606 607 /* 608 * Always re-initialize the disk structure. We want statistics 609 * to start with a clean slate. 610 */ 611 bzero(&xy->sc_dk, sizeof(xy->sc_dk)); 612 xy->sc_dk.dk_driver = &xydkdriver; 613 xy->sc_dk.dk_name = xy->sc_dev.dv_xname; 614 615 /* if booting, init the xy_softc */ 616 617 if (xa->booting) { 618 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 619 xy->flags = 0; 620 xy->parent = xyc; 621 622 /* init queue of waiting bufs */ 623 624 BUFQ_INIT(&xy->xyq); 625 626 xy->xyrq = &xyc->reqs[xa->driveno]; 627 628 } 629 xy->xy_drive = xa->driveno; 630 fmode = xa->fullmode; 631 xyc->sc_drives[xa->driveno] = xy; 632 633 /* if not booting, make sure we are the only process in the attach for 634 * this drive. if locked out, sleep on it. */ 635 636 if (!xa->booting) { 637 s = splbio(); 638 while (xy->state == XY_DRIVE_ATTACHING) { 639 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 640 splx(s); 641 return; 642 } 643 } 644 printf("%s at %s", 645 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 646 } 647 648 /* we now have control */ 649 xy->state = XY_DRIVE_ATTACHING; 650 newstate = XY_DRIVE_UNKNOWN; 651 652 buf = NULL; 653 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->auxmap, &seg, &rseg, 654 XYFM_BPS, 655 (caddr_t *)&buf, 656 (bus_addr_t *)&dmaddr)) != 0) { 657 printf("%s: DMA buffer alloc error %d\n", 658 xyc->sc_dev.dv_xname, error); 659 return; 660 } 661 662 /* first try and reset the drive */ 663 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 664 XYC_DONE(xyc, error); 665 if (error == XY_ERR_DNRY) { 666 printf(" drive %d: off-line\n", xa->driveno); 667 goto done; 668 } 669 if (error) { 670 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 671 goto done; 672 } 673 printf(" drive %d: ready", xa->driveno); 674 675 /* 676 * now set drive parameters (to semi-bogus values) so we can read the 677 * disk label. 678 */ 679 xy->pcyl = xy->ncyl = 1; 680 xy->acyl = 0; 681 xy->nhead = 1; 682 xy->nsect = 1; 683 xy->sectpercyl = 1; 684 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 685 xy->dkb.bt_bad[lcv].bt_cyl = 686 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 687 688 /* read disk label */ 689 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 690 xy->drive_type++) { 691 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 692 dmaddr, fmode); 693 XYC_DONE(xyc, error); 694 if (error == XY_ERR_AOK) break; 695 } 696 697 if (error != XY_ERR_AOK) { 698 printf("\n%s: reading disk label failed: %s\n", 699 xy->sc_dev.dv_xname, xyc_e2str(error)); 700 goto done; 701 } 702 printf(" (drive type %d)\n", xy->drive_type); 703 704 newstate = XY_DRIVE_NOLABEL; 705 706 xy->hw_spt = spt = 0; /* XXX needed ? */ 707 /* Attach the disk: must be before getdisklabel to malloc label */ 708 disk_attach(&xy->sc_dk); 709 710 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 711 goto done; 712 713 /* inform the user of what is up */ 714 printf("%s: <%s>, pcyl %d\n", xy->sc_dev.dv_xname, 715 buf, xy->pcyl); 716 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 717 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 718 xy->sc_dev.dv_xname, mb, xy->ncyl, xy->nhead, xy->nsect, 719 XYFM_BPS); 720 721 /* 722 * 450/451 stupidity: the drive type is encoded into the format 723 * of the disk. the drive type in the IOPB must match the drive 724 * type in the format, or you will not be able to do I/O to the 725 * disk (you get header not found errors). if you have two drives 726 * of different sizes that have the same drive type in their 727 * formatting then you are out of luck. 728 * 729 * this problem was corrected in the 753/7053. 730 */ 731 732 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 733 oxy = xyc->sc_drives[lcv]; 734 if (oxy == NULL || oxy == xy) continue; 735 if (oxy->drive_type != xy->drive_type) continue; 736 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 737 xy->nhead != oxy->nhead) { 738 printf("%s: %s and %s must be the same size!\n", 739 xyc->sc_dev.dv_xname, xy->sc_dev.dv_xname, 740 oxy->sc_dev.dv_xname); 741 panic("xy drive size mismatch"); 742 } 743 } 744 745 746 /* now set the real drive parameters! */ 747 748 blk = (xy->nsect - 1) + 749 ((xy->nhead - 1) * xy->nsect) + 750 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 751 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 752 XYC_DONE(xyc, error); 753 if (error) { 754 printf("%s: write drive size failed: %s\n", 755 xy->sc_dev.dv_xname, xyc_e2str(error)); 756 goto done; 757 } 758 newstate = XY_DRIVE_ONLINE; 759 760 /* 761 * read bad144 table. this table resides on the first sector of the 762 * last track of the disk (i.e. second cyl of "acyl" area). 763 */ 764 765 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 766 /* last cyl */ 767 (xy->nhead - 1) * xy->nsect; /* last head */ 768 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 769 dmaddr, fmode); 770 XYC_DONE(xyc, error); 771 if (error) { 772 printf("%s: reading bad144 failed: %s\n", 773 xy->sc_dev.dv_xname, xyc_e2str(error)); 774 goto done; 775 } 776 777 /* check dkbad for sanity */ 778 dkb = (struct dkbad *) buf; 779 for (lcv = 0; lcv < 126; lcv++) { 780 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 781 dkb->bt_bad[lcv].bt_cyl == 0) && 782 dkb->bt_bad[lcv].bt_trksec == 0xffff) 783 continue; /* blank */ 784 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 785 break; 786 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 787 break; 788 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 789 break; 790 } 791 if (lcv != 126) { 792 printf("%s: warning: invalid bad144 sector!\n", 793 xy->sc_dev.dv_xname); 794 } else { 795 bcopy(buf, &xy->dkb, XYFM_BPS); 796 } 797 798 dk_establish(&xy->sc_dk, &xy->sc_dev); /* XXX */ 799 800 done: 801 if (buf != NULL) { 802 xy_dmamem_free(xyc->dmatag, xyc->auxmap, 803 &seg, rseg, XYFM_BPS, buf); 804 } 805 806 xy->state = newstate; 807 if (!xa->booting) { 808 wakeup(&xy->state); 809 splx(s); 810 } 811 } 812 813 /* 814 * end of autoconfig functions 815 */ 816 817 /* 818 * { b , c } d e v s w f u n c t i o n s 819 */ 820 821 /* 822 * xyclose: close device 823 */ 824 int 825 xyclose(dev, flag, fmt, p) 826 dev_t dev; 827 int flag, fmt; 828 struct proc *p; 829 830 { 831 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 832 int part = DISKPART(dev); 833 834 /* clear mask bits */ 835 836 switch (fmt) { 837 case S_IFCHR: 838 xy->sc_dk.dk_copenmask &= ~(1 << part); 839 break; 840 case S_IFBLK: 841 xy->sc_dk.dk_bopenmask &= ~(1 << part); 842 break; 843 } 844 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 845 846 return 0; 847 } 848 849 /* 850 * xydump: crash dump system 851 */ 852 int 853 xydump(dev, blkno, va, size) 854 dev_t dev; 855 daddr_t blkno; 856 caddr_t va; 857 size_t size; 858 { 859 int unit, part; 860 struct xy_softc *xy; 861 862 unit = DISKUNIT(dev); 863 if (unit >= xy_cd.cd_ndevs) 864 return ENXIO; 865 part = DISKPART(dev); 866 867 xy = xy_cd.cd_devs[unit]; 868 869 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 870 'a' + part); 871 872 return ENXIO; 873 874 /* outline: globals: "dumplo" == sector number of partition to start 875 * dump at (convert to physical sector with partition table) 876 * "dumpsize" == size of dump in clicks "physmem" == size of physical 877 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 878 * physmem) 879 * 880 * dump a copy of physical memory to the dump device starting at sector 881 * "dumplo" in the swap partition (make sure > 0). map in pages as 882 * we go. use polled I/O. 883 * 884 * XXX how to handle NON_CONTIG? */ 885 886 } 887 888 /* 889 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 890 */ 891 int 892 xyioctl(dev, command, addr, flag, p) 893 dev_t dev; 894 u_long command; 895 caddr_t addr; 896 int flag; 897 struct proc *p; 898 899 { 900 struct xy_softc *xy; 901 struct xd_iocmd *xio; 902 int error, s, unit; 903 904 unit = DISKUNIT(dev); 905 906 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 907 return (ENXIO); 908 909 /* switch on ioctl type */ 910 911 switch (command) { 912 case DIOCSBAD: /* set bad144 info */ 913 if ((flag & FWRITE) == 0) 914 return EBADF; 915 s = splbio(); 916 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 917 splx(s); 918 return 0; 919 920 case DIOCGDINFO: /* get disk label */ 921 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 922 return 0; 923 924 case DIOCGPART: /* get partition info */ 925 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 926 ((struct partinfo *) addr)->part = 927 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 928 return 0; 929 930 case DIOCSDINFO: /* set disk label */ 931 if ((flag & FWRITE) == 0) 932 return EBADF; 933 error = setdisklabel(xy->sc_dk.dk_label, 934 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 935 xy->sc_dk.dk_cpulabel); 936 if (error == 0) { 937 if (xy->state == XY_DRIVE_NOLABEL) 938 xy->state = XY_DRIVE_ONLINE; 939 } 940 return error; 941 942 case DIOCWLABEL: /* change write status of disk label */ 943 if ((flag & FWRITE) == 0) 944 return EBADF; 945 if (*(int *) addr) 946 xy->flags |= XY_WLABEL; 947 else 948 xy->flags &= ~XY_WLABEL; 949 return 0; 950 951 case DIOCWDINFO: /* write disk label */ 952 if ((flag & FWRITE) == 0) 953 return EBADF; 954 error = setdisklabel(xy->sc_dk.dk_label, 955 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 956 xy->sc_dk.dk_cpulabel); 957 if (error == 0) { 958 if (xy->state == XY_DRIVE_NOLABEL) 959 xy->state = XY_DRIVE_ONLINE; 960 961 /* Simulate opening partition 0 so write succeeds. */ 962 xy->sc_dk.dk_openmask |= (1 << 0); 963 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 964 xystrategy, xy->sc_dk.dk_label, 965 xy->sc_dk.dk_cpulabel); 966 xy->sc_dk.dk_openmask = 967 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 968 } 969 return error; 970 971 case DIOSXDCMD: 972 xio = (struct xd_iocmd *) addr; 973 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 974 return (error); 975 return (xyc_ioctlcmd(xy, dev, xio)); 976 977 default: 978 return ENOTTY; 979 } 980 } 981 982 /* 983 * xyopen: open drive 984 */ 985 986 int 987 xyopen(dev, flag, fmt, p) 988 dev_t dev; 989 int flag, fmt; 990 struct proc *p; 991 { 992 int unit, part; 993 struct xy_softc *xy; 994 struct xyc_attach_args xa; 995 996 /* first, could it be a valid target? */ 997 998 unit = DISKUNIT(dev); 999 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 1000 return (ENXIO); 1001 part = DISKPART(dev); 1002 1003 /* do we need to attach the drive? */ 1004 1005 if (xy->state == XY_DRIVE_UNKNOWN) { 1006 xa.driveno = xy->xy_drive; 1007 xa.fullmode = XY_SUB_WAIT; 1008 xa.booting = 0; 1009 xyattach((struct device *) xy->parent, 1010 (struct device *) xy, &xa); 1011 if (xy->state == XY_DRIVE_UNKNOWN) { 1012 return (EIO); 1013 } 1014 } 1015 /* check for partition */ 1016 1017 if (part != RAW_PART && 1018 (part >= xy->sc_dk.dk_label->d_npartitions || 1019 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1020 return (ENXIO); 1021 } 1022 /* set open masks */ 1023 1024 switch (fmt) { 1025 case S_IFCHR: 1026 xy->sc_dk.dk_copenmask |= (1 << part); 1027 break; 1028 case S_IFBLK: 1029 xy->sc_dk.dk_bopenmask |= (1 << part); 1030 break; 1031 } 1032 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1033 1034 return 0; 1035 } 1036 1037 int 1038 xyread(dev, uio, flags) 1039 dev_t dev; 1040 struct uio *uio; 1041 int flags; 1042 { 1043 1044 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1045 } 1046 1047 int 1048 xywrite(dev, uio, flags) 1049 dev_t dev; 1050 struct uio *uio; 1051 int flags; 1052 { 1053 1054 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1055 } 1056 1057 1058 /* 1059 * xysize: return size of a partition for a dump 1060 */ 1061 1062 int 1063 xysize(dev) 1064 dev_t dev; 1065 1066 { 1067 struct xy_softc *xysc; 1068 int unit, part, size, omask; 1069 1070 /* valid unit? */ 1071 unit = DISKUNIT(dev); 1072 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1073 return (-1); 1074 1075 part = DISKPART(dev); 1076 omask = xysc->sc_dk.dk_openmask & (1 << part); 1077 1078 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1079 return (-1); 1080 1081 /* do it */ 1082 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1083 size = -1; /* only give valid size for swap partitions */ 1084 else 1085 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1086 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1087 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1088 return (-1); 1089 return (size); 1090 } 1091 1092 /* 1093 * xystrategy: buffering system interface to xy. 1094 */ 1095 1096 void 1097 xystrategy(bp) 1098 struct buf *bp; 1099 1100 { 1101 struct xy_softc *xy; 1102 int s, unit; 1103 struct xyc_attach_args xa; 1104 struct disklabel *lp; 1105 daddr_t blkno; 1106 1107 unit = DISKUNIT(bp->b_dev); 1108 1109 /* check for live device */ 1110 1111 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1112 bp->b_blkno < 0 || 1113 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1114 bp->b_error = EINVAL; 1115 goto bad; 1116 } 1117 /* do we need to attach the drive? */ 1118 1119 if (xy->state == XY_DRIVE_UNKNOWN) { 1120 xa.driveno = xy->xy_drive; 1121 xa.fullmode = XY_SUB_WAIT; 1122 xa.booting = 0; 1123 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1124 if (xy->state == XY_DRIVE_UNKNOWN) { 1125 bp->b_error = EIO; 1126 goto bad; 1127 } 1128 } 1129 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1130 /* no I/O to unlabeled disks, unless raw partition */ 1131 bp->b_error = EIO; 1132 goto bad; 1133 } 1134 /* short circuit zero length request */ 1135 1136 if (bp->b_bcount == 0) 1137 goto done; 1138 1139 /* check bounds with label (disksubr.c). Determine the size of the 1140 * transfer, and make sure it is within the boundaries of the 1141 * partition. Adjust transfer if needed, and signal errors or early 1142 * completion. */ 1143 1144 lp = xy->sc_dk.dk_label; 1145 1146 if (bounds_check_with_label(bp, lp, 1147 (xy->flags & XY_WLABEL) != 0) <= 0) 1148 goto done; 1149 1150 /* 1151 * Now convert the block number to absolute and put it in 1152 * terms of the device's logical block size. 1153 */ 1154 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1155 if (DISKPART(bp->b_dev) != RAW_PART) 1156 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1157 1158 bp->b_rawblkno = blkno; 1159 1160 /* 1161 * now we know we have a valid buf structure that we need to do I/O 1162 * on. 1163 */ 1164 s = splbio(); /* protect the queues */ 1165 1166 disksort_blkno(&xy->xyq, bp); 1167 1168 /* start 'em up */ 1169 1170 xyc_start(xy->parent, NULL); 1171 1172 /* done! */ 1173 1174 splx(s); 1175 return; 1176 1177 bad: /* tells upper layers we have an error */ 1178 bp->b_flags |= B_ERROR; 1179 done: /* tells upper layers we are done with this 1180 * buf */ 1181 bp->b_resid = bp->b_bcount; 1182 biodone(bp); 1183 } 1184 /* 1185 * end of {b,c}devsw functions 1186 */ 1187 1188 /* 1189 * i n t e r r u p t f u n c t i o n 1190 * 1191 * xycintr: hardware interrupt. 1192 */ 1193 int 1194 xycintr(v) 1195 void *v; 1196 1197 { 1198 struct xyc_softc *xycsc = v; 1199 1200 /* kick the event counter */ 1201 1202 xycsc->sc_intrcnt.ev_count++; 1203 1204 /* remove as many done IOPBs as possible */ 1205 1206 xyc_remove_iorq(xycsc); 1207 1208 /* start any iorq's already waiting */ 1209 1210 xyc_start(xycsc, NULL); 1211 1212 return (1); 1213 } 1214 /* 1215 * end of interrupt function 1216 */ 1217 1218 /* 1219 * i n t e r n a l f u n c t i o n s 1220 */ 1221 1222 /* 1223 * xyc_rqinit: fill out the fields of an I/O request 1224 */ 1225 1226 inline void 1227 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1228 struct xy_iorq *rq; 1229 struct xyc_softc *xyc; 1230 struct xy_softc *xy; 1231 int md; 1232 u_long blk; 1233 int cnt; 1234 caddr_t db; 1235 struct buf *bp; 1236 { 1237 rq->xyc = xyc; 1238 rq->xy = xy; 1239 rq->ttl = XYC_MAXTTL + 10; 1240 rq->mode = md; 1241 rq->tries = rq->errno = rq->lasterror = 0; 1242 rq->blockno = blk; 1243 rq->sectcnt = cnt; 1244 rq->dbuf = db; 1245 rq->buf = bp; 1246 } 1247 1248 /* 1249 * xyc_rqtopb: load up an IOPB based on an iorq 1250 */ 1251 1252 void 1253 xyc_rqtopb(iorq, iopb, cmd, subfun) 1254 struct xy_iorq *iorq; 1255 struct xy_iopb *iopb; 1256 int cmd, subfun; 1257 1258 { 1259 u_long block, dp; 1260 1261 /* normal IOPB case, standard stuff */ 1262 1263 /* chain bit handled later */ 1264 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1265 iopb->com = cmd; 1266 iopb->errno = 0; 1267 iopb->errs = 0; 1268 iopb->done = 0; 1269 if (iorq->xy) { 1270 iopb->unit = iorq->xy->xy_drive; 1271 iopb->dt = iorq->xy->drive_type; 1272 } else { 1273 iopb->unit = 0; 1274 iopb->dt = 0; 1275 } 1276 block = iorq->blockno; 1277 if (iorq->xy == NULL || block == 0) { 1278 iopb->sect = iopb->head = iopb->cyl = 0; 1279 } else { 1280 iopb->sect = block % iorq->xy->nsect; 1281 block = block / iorq->xy->nsect; 1282 iopb->head = block % iorq->xy->nhead; 1283 block = block / iorq->xy->nhead; 1284 iopb->cyl = block; 1285 } 1286 iopb->scnt = iorq->sectcnt; 1287 dp = (u_long) iorq->dbuf; 1288 if (iorq->dbuf == NULL) { 1289 iopb->dataa = 0; 1290 iopb->datar = 0; 1291 } else { 1292 iopb->dataa = (dp & 0xffff); 1293 iopb->datar = ((dp & 0xff0000) >> 16); 1294 } 1295 iopb->subfn = subfun; 1296 } 1297 1298 1299 /* 1300 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1301 */ 1302 1303 int 1304 xyc_unbusy(xyc, del) 1305 1306 struct xyc *xyc; 1307 int del; 1308 1309 { 1310 while (del-- > 0) { 1311 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1312 break; 1313 DELAY(1); 1314 } 1315 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1316 } 1317 1318 /* 1319 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1320 * note that NORM requests are handled seperately. 1321 */ 1322 int 1323 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1324 struct xyc_softc *xycsc; 1325 int cmd, subfn, unit, block, scnt; 1326 char *dptr; 1327 int fullmode; 1328 1329 { 1330 int submode = XY_STATE(fullmode); 1331 struct xy_iorq *iorq = xycsc->ciorq; 1332 struct xy_iopb *iopb = xycsc->ciopb; 1333 1334 /* 1335 * is someone else using the control iopq wait for it if we can 1336 */ 1337 start: 1338 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1339 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1340 return(XY_ERR_FAIL); 1341 goto start; 1342 } 1343 1344 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1345 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1346 iorq->mode = XY_SUB_FREE; 1347 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1348 } 1349 1350 /* init iorq/iopb */ 1351 1352 xyc_rqinit(iorq, xycsc, 1353 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1354 fullmode, block, scnt, dptr, NULL); 1355 1356 /* load IOPB from iorq */ 1357 1358 xyc_rqtopb(iorq, iopb, cmd, subfn); 1359 1360 /* submit it for processing */ 1361 1362 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1363 1364 return(XY_ERR_AOK); 1365 } 1366 1367 /* 1368 * xyc_startbuf 1369 * start a buffer for running 1370 */ 1371 1372 int 1373 xyc_startbuf(xycsc, xysc, bp) 1374 struct xyc_softc *xycsc; 1375 struct xy_softc *xysc; 1376 struct buf *bp; 1377 1378 { 1379 int partno, error; 1380 struct xy_iorq *iorq; 1381 struct xy_iopb *iopb; 1382 u_long block; 1383 1384 iorq = xysc->xyrq; 1385 iopb = iorq->iopb; 1386 1387 /* get buf */ 1388 1389 if (bp == NULL) 1390 panic("xyc_startbuf null buf"); 1391 1392 partno = DISKPART(bp->b_dev); 1393 #ifdef XYC_DEBUG 1394 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1395 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1396 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1397 bp->b_bcount, bp->b_data); 1398 #endif 1399 1400 /* 1401 * load request. 1402 * 1403 * note that iorq points to the buffer as mapped into DVMA space, 1404 * where as the bp->b_data points to its non-DVMA mapping. 1405 */ 1406 1407 block = bp->b_rawblkno; 1408 1409 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1410 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1411 if (error != 0) { 1412 printf("%s: warning: cannot load DMA map\n", 1413 xycsc->sc_dev.dv_xname); 1414 return (XY_ERR_FAIL); /* XXX: need some sort of 1415 * call-back scheme here? */ 1416 } 1417 1418 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1419 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1420 ? BUS_DMASYNC_PREREAD 1421 : BUS_DMASYNC_PREWRITE); 1422 1423 /* init iorq and load iopb from it */ 1424 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1425 bp->b_bcount / XYFM_BPS, 1426 (caddr_t)iorq->dmamap->dm_segs[0].ds_addr, 1427 bp); 1428 1429 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1430 1431 /* Instrumentation. */ 1432 disk_busy(&xysc->sc_dk); 1433 1434 return (XY_ERR_AOK); 1435 } 1436 1437 1438 /* 1439 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1440 * if ok. if it fail returns an error code. type is XY_SUB_*. 1441 * 1442 * note: caller frees iorq in all cases except NORM 1443 * 1444 * return value: 1445 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1446 * WAIT: XY_AOK (success), <error-code> (failed) 1447 * POLL: <same as WAIT> 1448 * NOQ : <same as NORM> 1449 * 1450 * there are three sources for i/o requests: 1451 * [1] xystrategy: normal block I/O, using "struct buf" system. 1452 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1453 * [3] open/ioctl: these are I/O requests done in the context of a process, 1454 * and the process should block until they are done. 1455 * 1456 * software state is stored in the iorq structure. each iorq has an 1457 * iopb structure. the hardware understands the iopb structure. 1458 * every command must go through an iopb. a 450 handles one iopb at a 1459 * time, where as a 451 can take them in chains. [the 450 claims it 1460 * can handle chains, but is appears to be buggy...] iopb are allocated 1461 * in DVMA space at boot up time. each disk gets one iopb, and the 1462 * controller gets one (for POLL and WAIT commands). what happens if 1463 * the iopb is busy? for i/o type [1], the buffers are queued at the 1464 * "buff" layer and * picked up later by the interrupt routine. for case 1465 * [2] we can only be blocked if there is a WAIT type I/O request being 1466 * run. since this can only happen when we are crashing, we wait a sec 1467 * and then steal the IOPB. for case [3] the process can sleep 1468 * on the iorq free list until some iopbs are avaliable. 1469 */ 1470 1471 1472 int 1473 xyc_submit_iorq(xycsc, iorq, type) 1474 struct xyc_softc *xycsc; 1475 struct xy_iorq *iorq; 1476 int type; 1477 1478 { 1479 struct xy_iopb *dmaiopb; 1480 1481 #ifdef XYC_DEBUG 1482 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1483 xycsc->sc_dev.dv_xname, iorq, type); 1484 #endif 1485 1486 /* first check and see if controller is busy */ 1487 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1488 #ifdef XYC_DEBUG 1489 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1490 #endif 1491 if (type == XY_SUB_NOQ) 1492 return (XY_ERR_FAIL); /* failed */ 1493 switch (type) { 1494 case XY_SUB_NORM: 1495 return XY_ERR_AOK; /* success */ 1496 case XY_SUB_WAIT: 1497 while (iorq->iopb->done == 0) { 1498 sleep(iorq, PRIBIO); 1499 } 1500 return (iorq->errno); 1501 case XY_SUB_POLL: /* steal controller */ 1502 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1503 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1504 panic("xyc_submit_iorq: stuck xyc"); 1505 printf("%s: stole controller\n", 1506 xycsc->sc_dev.dv_xname); 1507 break; 1508 default: 1509 panic("xyc_submit_iorq adding"); 1510 } 1511 } 1512 1513 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1514 if (dmaiopb == NULL) { /* nothing doing? */ 1515 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1516 return(XY_ERR_AOK); 1517 panic("xyc_submit_iorq: xyc_chain failed!\n"); 1518 } 1519 1520 XYC_GO(xycsc->xyc, (u_long)dmaiopb); 1521 1522 /* command now running, wrap it up */ 1523 switch (type) { 1524 case XY_SUB_NORM: 1525 case XY_SUB_NOQ: 1526 return (XY_ERR_AOK); /* success */ 1527 case XY_SUB_WAIT: 1528 while (iorq->iopb->done == 0) { 1529 sleep(iorq, PRIBIO); 1530 } 1531 return (iorq->errno); 1532 case XY_SUB_POLL: 1533 return (xyc_piodriver(xycsc, iorq)); 1534 default: 1535 panic("xyc_submit_iorq wrap up"); 1536 } 1537 panic("xyc_submit_iorq"); 1538 return 0; /* not reached */ 1539 } 1540 1541 1542 /* 1543 * xyc_chain: build a chain. return dvma address of first element in 1544 * the chain. iorq != NULL: means we only want that item on the chain. 1545 */ 1546 1547 struct xy_iopb * 1548 xyc_chain(xycsc, iorq) 1549 struct xyc_softc *xycsc; 1550 struct xy_iorq *iorq; 1551 1552 { 1553 int togo, chain, hand; 1554 1555 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1556 1557 /* 1558 * promote control IOPB to the top 1559 */ 1560 if (iorq == NULL) { 1561 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1562 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1563 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1564 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1565 } 1566 1567 /* 1568 * special case: if iorq != NULL then we have a POLL or WAIT request. 1569 * we let these take priority and do them first. 1570 */ 1571 if (iorq) { 1572 xycsc->xy_chain[0] = iorq; 1573 iorq->iopb->chen = 0; 1574 return(iorq->dmaiopb); 1575 } 1576 1577 /* 1578 * NORM case: do round robin and maybe chain (if allowed and possible) 1579 */ 1580 chain = 0; 1581 hand = xycsc->xy_hand; 1582 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1583 1584 for (togo = XYC_MAXIOPB; togo > 0; 1585 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1586 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1587 1588 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1589 xycsc->iopbase[hand].done) 1590 continue; /* not ready-for-i/o */ 1591 1592 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1593 iopb = xycsc->xy_chain[chain]->iopb; 1594 iopb->chen = 0; 1595 if (chain != 0) { 1596 /* adding a link to a chain */ 1597 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1598 prev_iopb->chen = 1; 1599 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1600 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1601 } else { 1602 /* head of chain */ 1603 iorq = xycsc->xy_chain[chain]; 1604 } 1605 chain++; 1606 1607 /* quit if chaining dis-allowed */ 1608 if (xycsc->no_ols) 1609 break; 1610 } 1611 1612 return(iorq ? iorq->dmaiopb : NULL); 1613 } 1614 1615 /* 1616 * xyc_piodriver 1617 * 1618 * programmed i/o driver. this function takes over the computer 1619 * and drains off the polled i/o request. it returns the status of the iorq 1620 * the caller is interesting in. 1621 */ 1622 int 1623 xyc_piodriver(xycsc, iorq) 1624 struct xyc_softc *xycsc; 1625 struct xy_iorq *iorq; 1626 1627 { 1628 int nreset = 0; 1629 int retval = 0; 1630 u_long res; 1631 #ifdef XYC_DEBUG 1632 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1633 #endif 1634 1635 while (iorq->iopb->done == 0) { 1636 1637 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1638 1639 /* we expect some progress soon */ 1640 if (res == XY_ERR_FAIL && nreset >= 2) { 1641 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1642 #ifdef XYC_DEBUG 1643 printf("xyc_piodriver: timeout\n"); 1644 #endif 1645 return (XY_ERR_FAIL); 1646 } 1647 if (res == XY_ERR_FAIL) { 1648 if (xyc_reset(xycsc, 0, 1649 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1650 XY_ERR_FAIL, 1651 0) == XY_ERR_FAIL) 1652 return (XY_ERR_FAIL); /* flushes all but POLL 1653 * requests, resets */ 1654 continue; 1655 } 1656 1657 xyc_remove_iorq(xycsc); /* may resubmit request */ 1658 1659 if (iorq->iopb->done == 0) 1660 xyc_start(xycsc, iorq); 1661 } 1662 1663 /* get return value */ 1664 1665 retval = iorq->errno; 1666 1667 #ifdef XYC_DEBUG 1668 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1669 iorq->errno, xyc_e2str(iorq->errno)); 1670 #endif 1671 1672 /* start up any bufs that have queued */ 1673 1674 xyc_start(xycsc, NULL); 1675 1676 return (retval); 1677 } 1678 1679 /* 1680 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1681 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1682 */ 1683 void 1684 xyc_xyreset(xycsc, xysc) 1685 struct xyc_softc *xycsc; 1686 struct xy_softc *xysc; 1687 1688 { 1689 struct xy_iopb tmpiopb; 1690 struct xy_iopb *iopb; 1691 int del; 1692 1693 iopb = xycsc->ciopb; 1694 1695 /* Save contents */ 1696 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1697 1698 iopb->chen = iopb->done = iopb->errs = 0; 1699 iopb->ien = 0; 1700 iopb->com = XYCMD_RST; 1701 iopb->unit = xysc->xy_drive; 1702 1703 XYC_GO(xycsc->xyc, (u_long)xycsc->ciorq->dmaiopb); 1704 1705 del = XYC_RESETUSEC; 1706 while (del > 0) { 1707 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1708 break; 1709 DELAY(1); 1710 del--; 1711 } 1712 1713 if (del <= 0 || iopb->errs) { 1714 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1715 xyc_e2str(iopb->errno)); 1716 del = xycsc->xyc->xyc_rsetup; 1717 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1718 panic("xyc_reset"); 1719 } else { 1720 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1721 } 1722 1723 /* Restore contents */ 1724 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1725 } 1726 1727 1728 /* 1729 * xyc_reset: reset everything: requests are marked as errors except 1730 * a polled request (which is resubmitted) 1731 */ 1732 int 1733 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1734 struct xyc_softc *xycsc; 1735 int quiet, error; 1736 struct xy_iorq *blastmode; 1737 struct xy_softc *xysc; 1738 1739 { 1740 int del = 0, lcv, retval = XY_ERR_AOK; 1741 1742 /* soft reset hardware */ 1743 1744 if (!quiet) 1745 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1746 del = xycsc->xyc->xyc_rsetup; 1747 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1748 if (del == XY_ERR_FAIL) { 1749 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1750 retval = XY_ERR_FAIL; 1751 } 1752 if (xysc) 1753 xyc_xyreset(xycsc, xysc); 1754 1755 /* fix queues based on "blast-mode" */ 1756 1757 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1758 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1759 1760 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1761 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1762 XY_STATE(iorq->mode) != XY_SUB_NORM) 1763 /* is it active? */ 1764 continue; 1765 1766 if (blastmode == XY_RSET_ALL || 1767 blastmode != iorq) { 1768 /* failed */ 1769 iorq->errno = error; 1770 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1771 switch (XY_STATE(iorq->mode)) { 1772 case XY_SUB_NORM: 1773 iorq->buf->b_error = EIO; 1774 iorq->buf->b_flags |= B_ERROR; 1775 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1776 1777 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1778 iorq->dmamap->dm_mapsize, 1779 (iorq->buf->b_flags & B_READ) 1780 ? BUS_DMASYNC_POSTREAD 1781 : BUS_DMASYNC_POSTWRITE); 1782 1783 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1784 1785 BUFQ_REMOVE(&iorq->xy->xyq, iorq->buf); 1786 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1787 (xycsc->reqs[lcv].buf->b_bcount - 1788 xycsc->reqs[lcv].buf->b_resid)); 1789 biodone(iorq->buf); 1790 iorq->mode = XY_SUB_FREE; 1791 break; 1792 case XY_SUB_WAIT: 1793 wakeup(iorq); 1794 case XY_SUB_POLL: 1795 iorq->mode = 1796 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1797 break; 1798 } 1799 1800 } else { 1801 1802 /* resubmit, no need to do anything here */ 1803 } 1804 } 1805 1806 /* 1807 * now, if stuff is waiting, start it. 1808 * since we just reset it should go 1809 */ 1810 xyc_start(xycsc, NULL); 1811 1812 return (retval); 1813 } 1814 1815 /* 1816 * xyc_start: start waiting buffers 1817 */ 1818 1819 void 1820 xyc_start(xycsc, iorq) 1821 struct xyc_softc *xycsc; 1822 struct xy_iorq *iorq; 1823 1824 { 1825 int lcv; 1826 struct xy_softc *xy; 1827 1828 if (iorq == NULL) { 1829 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1830 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1831 if (BUFQ_FIRST(&xy->xyq) == NULL) continue; 1832 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1833 xyc_startbuf(xycsc, xy, BUFQ_FIRST(&xy->xyq)); 1834 } 1835 } 1836 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1837 } 1838 1839 /* 1840 * xyc_remove_iorq: remove "done" IOPB's. 1841 */ 1842 1843 int 1844 xyc_remove_iorq(xycsc) 1845 struct xyc_softc *xycsc; 1846 1847 { 1848 int errno, rq, comm, errs; 1849 struct xyc *xyc = xycsc->xyc; 1850 u_long addr; 1851 struct xy_iopb *iopb; 1852 struct xy_iorq *iorq; 1853 struct buf *bp; 1854 1855 if (xyc->xyc_csr & XYC_DERR) { 1856 /* 1857 * DOUBLE ERROR: should never happen under normal use. This 1858 * error is so bad, you can't even tell which IOPB is bad, so 1859 * we dump them all. 1860 */ 1861 errno = XY_ERR_DERR; 1862 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1863 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1864 printf("%s: soft reset failed!\n", 1865 xycsc->sc_dev.dv_xname); 1866 panic("xyc_remove_iorq: controller DEAD"); 1867 } 1868 return (XY_ERR_AOK); 1869 } 1870 1871 /* 1872 * get iopb that is done, loop down the chain 1873 */ 1874 1875 if (xyc->xyc_csr & XYC_ERR) { 1876 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1877 } 1878 if (xyc->xyc_csr & XYC_IPND) { 1879 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1880 } 1881 1882 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1883 iorq = xycsc->xy_chain[rq]; 1884 if (iorq == NULL) break; /* done ! */ 1885 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1886 continue; /* free, or done */ 1887 iopb = iorq->iopb; 1888 if (iopb->done == 0) 1889 continue; /* not done yet */ 1890 1891 comm = iopb->com; 1892 errs = iopb->errs; 1893 1894 if (errs) 1895 iorq->errno = iopb->errno; 1896 else 1897 iorq->errno = 0; 1898 1899 /* handle non-fatal errors */ 1900 1901 if (errs && 1902 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1903 continue; /* AOK: we resubmitted it */ 1904 1905 1906 /* this iorq is now done (hasn't been restarted or anything) */ 1907 1908 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1909 xyc_perror(iorq, iopb, 0); 1910 1911 /* now, if read/write check to make sure we got all the data 1912 * we needed. (this may not be the case if we got an error in 1913 * the middle of a multisector request). */ 1914 1915 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1916 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1917 /* we just successfully processed a bad144 sector 1918 * note: if we are in bad 144 mode, the pointers have 1919 * been advanced already (see above) and are pointing 1920 * at the bad144 sector. to exit bad144 mode, we 1921 * must advance the pointers 1 sector and issue a new 1922 * request if there are still sectors left to process 1923 * 1924 */ 1925 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1926 1927 /* exit b144 mode */ 1928 iorq->mode = iorq->mode & (~XY_MODE_B144); 1929 1930 if (iorq->sectcnt) { /* more to go! */ 1931 iorq->lasterror = iorq->errno = iopb->errno = 0; 1932 iopb->errs = iopb->done = 0; 1933 iorq->tries = 0; 1934 iopb->scnt = iorq->sectcnt; 1935 iopb->cyl = iorq->blockno / 1936 iorq->xy->sectpercyl; 1937 iopb->head = 1938 (iorq->blockno / iorq->xy->nhead) % 1939 iorq->xy->nhead; 1940 iopb->sect = iorq->blockno % XYFM_BPS; 1941 addr = (u_long) iorq->dbuf; 1942 iopb->dataa = (addr & 0xffff); 1943 iopb->datar = ((addr & 0xff0000) >> 16); 1944 /* will resubit at end */ 1945 continue; 1946 } 1947 } 1948 /* final cleanup, totally done with this request */ 1949 1950 switch (XY_STATE(iorq->mode)) { 1951 case XY_SUB_NORM: 1952 bp = iorq->buf; 1953 if (errs) { 1954 bp->b_error = EIO; 1955 bp->b_flags |= B_ERROR; 1956 bp->b_resid = iorq->sectcnt * XYFM_BPS; 1957 } else { 1958 bp->b_resid = 0; /* done */ 1959 } 1960 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1961 iorq->dmamap->dm_mapsize, 1962 (iorq->buf->b_flags & B_READ) 1963 ? BUS_DMASYNC_POSTREAD 1964 : BUS_DMASYNC_POSTWRITE); 1965 1966 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1967 1968 BUFQ_REMOVE(&iorq->xy->xyq, bp); 1969 disk_unbusy(&iorq->xy->sc_dk, 1970 (bp->b_bcount - bp->b_resid)); 1971 iorq->mode = XY_SUB_FREE; 1972 biodone(bp); 1973 break; 1974 case XY_SUB_WAIT: 1975 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1976 wakeup(iorq); 1977 break; 1978 case XY_SUB_POLL: 1979 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1980 break; 1981 } 1982 } 1983 1984 return (XY_ERR_AOK); 1985 } 1986 1987 /* 1988 * xyc_perror: print error. 1989 * - if still_trying is true: we got an error, retried and got a 1990 * different error. in that case lasterror is the old error, 1991 * and errno is the new one. 1992 * - if still_trying is not true, then if we ever had an error it 1993 * is in lasterror. also, if iorq->errno == 0, then we recovered 1994 * from that error (otherwise iorq->errno == iorq->lasterror). 1995 */ 1996 void 1997 xyc_perror(iorq, iopb, still_trying) 1998 struct xy_iorq *iorq; 1999 struct xy_iopb *iopb; 2000 int still_trying; 2001 2002 { 2003 2004 int error = iorq->lasterror; 2005 2006 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 2007 : iorq->xyc->sc_dev.dv_xname); 2008 if (iorq->buf) 2009 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2010 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2011 printf("%s %d/%d/%d: ", 2012 (iopb->com == XYCMD_RD) ? "read" : "write", 2013 iopb->cyl, iopb->head, iopb->sect); 2014 printf("%s", xyc_e2str(error)); 2015 2016 if (still_trying) 2017 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 2018 else 2019 if (iorq->errno == 0) 2020 printf(" [recovered in %d tries]", iorq->tries); 2021 2022 printf("\n"); 2023 } 2024 2025 /* 2026 * xyc_error: non-fatal error encountered... recover. 2027 * return AOK if resubmitted, return FAIL if this iopb is done 2028 */ 2029 int 2030 xyc_error(xycsc, iorq, iopb, comm) 2031 struct xyc_softc *xycsc; 2032 struct xy_iorq *iorq; 2033 struct xy_iopb *iopb; 2034 int comm; 2035 2036 { 2037 int errno = iorq->errno; 2038 int erract = xyc_entoact(errno); 2039 int oldmode, advance; 2040 #ifdef __sparc__ 2041 int i; 2042 #endif 2043 2044 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2045 oldmode = iorq->mode; 2046 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2047 /* make xyc_start ignore us */ 2048 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 2049 iorq->mode = oldmode; 2050 } 2051 /* check for read/write to a sector in bad144 table if bad: redirect 2052 * request to bad144 area */ 2053 2054 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2055 (iorq->mode & XY_MODE_B144) == 0) { 2056 advance = iorq->sectcnt - iopb->scnt; 2057 XYC_ADVANCE(iorq, advance); 2058 #ifdef __sparc__ 2059 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2060 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2061 iorq->blockno % iorq->xy->nsect)) != -1) { 2062 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2063 * redirect */ 2064 iopb->errno = iopb->done = iopb->errs = 0; 2065 iopb->scnt = 1; 2066 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2067 /* second to last acyl */ 2068 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2069 * standard */ 2070 iopb->head = i / iorq->xy->nhead; 2071 iopb->sect = i % iorq->xy->nhead; 2072 /* will resubmit when we come out of remove_iorq */ 2073 return (XY_ERR_AOK); /* recovered! */ 2074 } 2075 #endif 2076 } 2077 2078 /* 2079 * it isn't a bad144 sector, must be real error! see if we can retry 2080 * it? 2081 */ 2082 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2083 xyc_perror(iorq, iopb, 1); /* inform of error state 2084 * change */ 2085 iorq->lasterror = errno; 2086 2087 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2088 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2089 iorq->tries++; 2090 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 2091 /* will resubmit at end of remove_iorq */ 2092 return (XY_ERR_AOK); /* recovered! */ 2093 } 2094 2095 /* failed to recover from this error */ 2096 return (XY_ERR_FAIL); 2097 } 2098 2099 /* 2100 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2101 */ 2102 void 2103 xyc_tick(arg) 2104 void *arg; 2105 2106 { 2107 struct xyc_softc *xycsc = arg; 2108 int lcv, s, reset = 0; 2109 2110 /* reduce ttl for each request if one goes to zero, reset xyc */ 2111 s = splbio(); 2112 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2113 if (xycsc->reqs[lcv].mode == 0 || 2114 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2115 continue; 2116 xycsc->reqs[lcv].ttl--; 2117 if (xycsc->reqs[lcv].ttl == 0) 2118 reset = 1; 2119 } 2120 if (reset) { 2121 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2122 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2123 } 2124 splx(s); 2125 2126 /* until next time */ 2127 2128 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2129 } 2130 2131 /* 2132 * xyc_ioctlcmd: this function provides a user level interface to the 2133 * controller via ioctl. this allows "format" programs to be written 2134 * in user code, and is also useful for some debugging. we return 2135 * an error code. called at user priority. 2136 * 2137 * XXX missing a few commands (see the 7053 driver for ideas) 2138 */ 2139 int 2140 xyc_ioctlcmd(xy, dev, xio) 2141 struct xy_softc *xy; 2142 dev_t dev; 2143 struct xd_iocmd *xio; 2144 2145 { 2146 int s, rqno, dummy = 0; 2147 caddr_t dvmabuf = NULL, buf = NULL; 2148 struct xyc_softc *xycsc; 2149 int rseg, error; 2150 bus_dma_segment_t seg; 2151 2152 /* check sanity of requested command */ 2153 2154 switch (xio->cmd) { 2155 2156 case XYCMD_NOP: /* no op: everything should be zero */ 2157 if (xio->subfn || xio->dptr || xio->dlen || 2158 xio->block || xio->sectcnt) 2159 return (EINVAL); 2160 break; 2161 2162 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2163 case XYCMD_WR: 2164 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2165 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2166 return (EINVAL); 2167 break; 2168 2169 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2170 return (EINVAL); 2171 2172 break; 2173 2174 default: 2175 return (EINVAL);/* ??? */ 2176 } 2177 2178 xycsc = xy->parent; 2179 2180 /* create DVMA buffer for request if needed */ 2181 if (xio->dlen) { 2182 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2183 &seg, &rseg, 2184 xio->dlen, &buf, 2185 (bus_addr_t *)&dvmabuf)) != 0) { 2186 return (error); 2187 } 2188 2189 if (xio->cmd == XYCMD_WR) { 2190 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2191 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2192 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2193 return (error); 2194 } 2195 } 2196 } 2197 /* do it! */ 2198 2199 error = 0; 2200 s = splbio(); 2201 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2202 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2203 if (rqno == XY_ERR_FAIL) { 2204 error = EIO; 2205 goto done; 2206 } 2207 xio->errno = xycsc->ciorq->errno; 2208 xio->tries = xycsc->ciorq->tries; 2209 XYC_DONE(xycsc, dummy); 2210 2211 if (xio->cmd == XYCMD_RD) 2212 error = copyout(buf, xio->dptr, xio->dlen); 2213 2214 done: 2215 splx(s); 2216 if (dvmabuf) { 2217 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2218 xio->dlen, buf); 2219 } 2220 return (error); 2221 } 2222 2223 /* 2224 * xyc_e2str: convert error code number into an error string 2225 */ 2226 char * 2227 xyc_e2str(no) 2228 int no; 2229 { 2230 switch (no) { 2231 case XY_ERR_FAIL: 2232 return ("Software fatal error"); 2233 case XY_ERR_DERR: 2234 return ("DOUBLE ERROR"); 2235 case XY_ERR_AOK: 2236 return ("Successful completion"); 2237 case XY_ERR_IPEN: 2238 return("Interrupt pending"); 2239 case XY_ERR_BCFL: 2240 return("Busy conflict"); 2241 case XY_ERR_TIMO: 2242 return("Operation timeout"); 2243 case XY_ERR_NHDR: 2244 return("Header not found"); 2245 case XY_ERR_HARD: 2246 return("Hard ECC error"); 2247 case XY_ERR_ICYL: 2248 return("Illegal cylinder address"); 2249 case XY_ERR_ISEC: 2250 return("Illegal sector address"); 2251 case XY_ERR_SMAL: 2252 return("Last sector too small"); 2253 case XY_ERR_SACK: 2254 return("Slave ACK error (non-existent memory)"); 2255 case XY_ERR_CHER: 2256 return("Cylinder and head/header error"); 2257 case XY_ERR_SRTR: 2258 return("Auto-seek retry successful"); 2259 case XY_ERR_WPRO: 2260 return("Write-protect error"); 2261 case XY_ERR_UIMP: 2262 return("Unimplemented command"); 2263 case XY_ERR_DNRY: 2264 return("Drive not ready"); 2265 case XY_ERR_SZER: 2266 return("Sector count zero"); 2267 case XY_ERR_DFLT: 2268 return("Drive faulted"); 2269 case XY_ERR_ISSZ: 2270 return("Illegal sector size"); 2271 case XY_ERR_SLTA: 2272 return("Self test A"); 2273 case XY_ERR_SLTB: 2274 return("Self test B"); 2275 case XY_ERR_SLTC: 2276 return("Self test C"); 2277 case XY_ERR_SOFT: 2278 return("Soft ECC error"); 2279 case XY_ERR_SFOK: 2280 return("Soft ECC error recovered"); 2281 case XY_ERR_IHED: 2282 return("Illegal head"); 2283 case XY_ERR_DSEQ: 2284 return("Disk sequencer error"); 2285 case XY_ERR_SEEK: 2286 return("Seek error"); 2287 default: 2288 return ("Unknown error"); 2289 } 2290 } 2291 2292 int 2293 xyc_entoact(errno) 2294 2295 int errno; 2296 2297 { 2298 switch (errno) { 2299 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2300 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2301 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2302 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2303 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2304 2305 return(XY_ERA_PROG); /* program error ! */ 2306 2307 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2308 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2309 case XY_ERR_SOFT: 2310 2311 return(XY_ERA_HARD); /* hard error, retry */ 2312 2313 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2314 2315 return(XY_ERA_RSET); /* hard error reset */ 2316 2317 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2318 2319 return(XY_ERA_SOFT); /* an FYI error */ 2320 2321 case XY_ERR_WPRO: 2322 2323 return(XY_ERA_WPRO); /* write protect */ 2324 } 2325 2326 return(XY_ERA_PROG); /* ??? */ 2327 } 2328
Indexes created Tue Sep 30 20:09:53 GMT 2025