xy.c revision 1.24
1 /* $NetBSD: xy.c,v 1.24 2000/06/04 19:15:18 cgd 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_data, 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, 0, 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_dynamic(&xyc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 547 xyc->sc_dev.dv_xname, "intr"); 548 549 callout_init(&xyc->sc_tick_ch); 550 551 /* now we must look for disks using autoconfig */ 552 xa.fullmode = XY_SUB_POLL; 553 xa.booting = 1; 554 555 for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++) 556 (void) config_found(self, (void *) &xa, NULL); 557 558 /* start the watchdog clock */ 559 callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc); 560 561 } 562 563 /* 564 * xymatch: probe for disk. 565 * 566 * note: we almost always say disk is present. this allows us to 567 * spin up and configure a disk after the system is booted (we can 568 * call xyattach!). 569 */ 570 int 571 xymatch(parent, cf, aux) 572 struct device *parent; 573 struct cfdata *cf; 574 void *aux; 575 { 576 struct xyc_attach_args *xa = aux; 577 578 /* looking for autoconf wildcard or exact match */ 579 580 if (cf->cf_loc[XYCCF_DRIVE] != XYCCF_DRIVE_DEFAULT && 581 cf->cf_loc[XYCCF_DRIVE] != xa->driveno) 582 return 0; 583 584 return 1; 585 586 } 587 588 /* 589 * xyattach: attach a disk. this can be called from autoconf and also 590 * from xyopen/xystrategy. 591 */ 592 void 593 xyattach(parent, self, aux) 594 struct device *parent, *self; 595 void *aux; 596 597 { 598 struct xy_softc *xy = (void *) self, *oxy; 599 struct xyc_softc *xyc = (void *) parent; 600 struct xyc_attach_args *xa = aux; 601 int spt, mb, blk, lcv, fmode, s = 0, newstate; 602 struct dkbad *dkb; 603 int rseg, error; 604 bus_dma_segment_t seg; 605 caddr_t dmaddr; 606 caddr_t buf; 607 608 /* 609 * Always re-initialize the disk structure. We want statistics 610 * to start with a clean slate. 611 */ 612 bzero(&xy->sc_dk, sizeof(xy->sc_dk)); 613 xy->sc_dk.dk_driver = &xydkdriver; 614 xy->sc_dk.dk_name = xy->sc_dev.dv_xname; 615 616 /* if booting, init the xy_softc */ 617 618 if (xa->booting) { 619 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 620 xy->flags = 0; 621 xy->parent = xyc; 622 623 /* init queue of waiting bufs */ 624 625 BUFQ_INIT(&xy->xyq); 626 627 xy->xyrq = &xyc->reqs[xa->driveno]; 628 629 } 630 xy->xy_drive = xa->driveno; 631 fmode = xa->fullmode; 632 xyc->sc_drives[xa->driveno] = xy; 633 634 /* if not booting, make sure we are the only process in the attach for 635 * this drive. if locked out, sleep on it. */ 636 637 if (!xa->booting) { 638 s = splbio(); 639 while (xy->state == XY_DRIVE_ATTACHING) { 640 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 641 splx(s); 642 return; 643 } 644 } 645 printf("%s at %s", 646 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 647 } 648 649 /* we now have control */ 650 xy->state = XY_DRIVE_ATTACHING; 651 newstate = XY_DRIVE_UNKNOWN; 652 653 buf = NULL; 654 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->auxmap, &seg, &rseg, 655 XYFM_BPS, 656 (caddr_t *)&buf, 657 (bus_addr_t *)&dmaddr)) != 0) { 658 printf("%s: DMA buffer alloc error %d\n", 659 xyc->sc_dev.dv_xname, error); 660 return; 661 } 662 663 /* first try and reset the drive */ 664 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 665 XYC_DONE(xyc, error); 666 if (error == XY_ERR_DNRY) { 667 printf(" drive %d: off-line\n", xa->driveno); 668 goto done; 669 } 670 if (error) { 671 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 672 goto done; 673 } 674 printf(" drive %d: ready", xa->driveno); 675 676 /* 677 * now set drive parameters (to semi-bogus values) so we can read the 678 * disk label. 679 */ 680 xy->pcyl = xy->ncyl = 1; 681 xy->acyl = 0; 682 xy->nhead = 1; 683 xy->nsect = 1; 684 xy->sectpercyl = 1; 685 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 686 xy->dkb.bt_bad[lcv].bt_cyl = 687 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 688 689 /* read disk label */ 690 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 691 xy->drive_type++) { 692 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 693 dmaddr, fmode); 694 XYC_DONE(xyc, error); 695 if (error == XY_ERR_AOK) break; 696 } 697 698 if (error != XY_ERR_AOK) { 699 printf("\n%s: reading disk label failed: %s\n", 700 xy->sc_dev.dv_xname, xyc_e2str(error)); 701 goto done; 702 } 703 printf(" (drive type %d)\n", xy->drive_type); 704 705 newstate = XY_DRIVE_NOLABEL; 706 707 xy->hw_spt = spt = 0; /* XXX needed ? */ 708 /* Attach the disk: must be before getdisklabel to malloc label */ 709 disk_attach(&xy->sc_dk); 710 711 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 712 goto done; 713 714 /* inform the user of what is up */ 715 printf("%s: <%s>, pcyl %d\n", xy->sc_dev.dv_xname, 716 buf, xy->pcyl); 717 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 718 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 719 xy->sc_dev.dv_xname, mb, xy->ncyl, xy->nhead, xy->nsect, 720 XYFM_BPS); 721 722 /* 723 * 450/451 stupidity: the drive type is encoded into the format 724 * of the disk. the drive type in the IOPB must match the drive 725 * type in the format, or you will not be able to do I/O to the 726 * disk (you get header not found errors). if you have two drives 727 * of different sizes that have the same drive type in their 728 * formatting then you are out of luck. 729 * 730 * this problem was corrected in the 753/7053. 731 */ 732 733 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 734 oxy = xyc->sc_drives[lcv]; 735 if (oxy == NULL || oxy == xy) continue; 736 if (oxy->drive_type != xy->drive_type) continue; 737 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 738 xy->nhead != oxy->nhead) { 739 printf("%s: %s and %s must be the same size!\n", 740 xyc->sc_dev.dv_xname, xy->sc_dev.dv_xname, 741 oxy->sc_dev.dv_xname); 742 panic("xy drive size mismatch"); 743 } 744 } 745 746 747 /* now set the real drive parameters! */ 748 749 blk = (xy->nsect - 1) + 750 ((xy->nhead - 1) * xy->nsect) + 751 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 752 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 753 XYC_DONE(xyc, error); 754 if (error) { 755 printf("%s: write drive size failed: %s\n", 756 xy->sc_dev.dv_xname, xyc_e2str(error)); 757 goto done; 758 } 759 newstate = XY_DRIVE_ONLINE; 760 761 /* 762 * read bad144 table. this table resides on the first sector of the 763 * last track of the disk (i.e. second cyl of "acyl" area). 764 */ 765 766 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 767 /* last cyl */ 768 (xy->nhead - 1) * xy->nsect; /* last head */ 769 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 770 dmaddr, fmode); 771 XYC_DONE(xyc, error); 772 if (error) { 773 printf("%s: reading bad144 failed: %s\n", 774 xy->sc_dev.dv_xname, xyc_e2str(error)); 775 goto done; 776 } 777 778 /* check dkbad for sanity */ 779 dkb = (struct dkbad *) buf; 780 for (lcv = 0; lcv < 126; lcv++) { 781 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 782 dkb->bt_bad[lcv].bt_cyl == 0) && 783 dkb->bt_bad[lcv].bt_trksec == 0xffff) 784 continue; /* blank */ 785 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 786 break; 787 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 788 break; 789 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 790 break; 791 } 792 if (lcv != 126) { 793 printf("%s: warning: invalid bad144 sector!\n", 794 xy->sc_dev.dv_xname); 795 } else { 796 bcopy(buf, &xy->dkb, XYFM_BPS); 797 } 798 799 done: 800 if (buf != NULL) { 801 xy_dmamem_free(xyc->dmatag, xyc->auxmap, 802 &seg, rseg, XYFM_BPS, buf); 803 } 804 805 xy->state = newstate; 806 if (!xa->booting) { 807 wakeup(&xy->state); 808 splx(s); 809 } 810 } 811 812 /* 813 * end of autoconfig functions 814 */ 815 816 /* 817 * { b , c } d e v s w f u n c t i o n s 818 */ 819 820 /* 821 * xyclose: close device 822 */ 823 int 824 xyclose(dev, flag, fmt, p) 825 dev_t dev; 826 int flag, fmt; 827 struct proc *p; 828 829 { 830 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 831 int part = DISKPART(dev); 832 833 /* clear mask bits */ 834 835 switch (fmt) { 836 case S_IFCHR: 837 xy->sc_dk.dk_copenmask &= ~(1 << part); 838 break; 839 case S_IFBLK: 840 xy->sc_dk.dk_bopenmask &= ~(1 << part); 841 break; 842 } 843 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 844 845 return 0; 846 } 847 848 /* 849 * xydump: crash dump system 850 */ 851 int 852 xydump(dev, blkno, va, size) 853 dev_t dev; 854 daddr_t blkno; 855 caddr_t va; 856 size_t size; 857 { 858 int unit, part; 859 struct xy_softc *xy; 860 861 unit = DISKUNIT(dev); 862 if (unit >= xy_cd.cd_ndevs) 863 return ENXIO; 864 part = DISKPART(dev); 865 866 xy = xy_cd.cd_devs[unit]; 867 868 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 869 'a' + part); 870 871 return ENXIO; 872 873 /* outline: globals: "dumplo" == sector number of partition to start 874 * dump at (convert to physical sector with partition table) 875 * "dumpsize" == size of dump in clicks "physmem" == size of physical 876 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 877 * physmem) 878 * 879 * dump a copy of physical memory to the dump device starting at sector 880 * "dumplo" in the swap partition (make sure > 0). map in pages as 881 * we go. use polled I/O. 882 * 883 * XXX how to handle NON_CONTIG? */ 884 885 } 886 887 /* 888 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 889 */ 890 int 891 xyioctl(dev, command, addr, flag, p) 892 dev_t dev; 893 u_long command; 894 caddr_t addr; 895 int flag; 896 struct proc *p; 897 898 { 899 struct xy_softc *xy; 900 struct xd_iocmd *xio; 901 int error, s, unit; 902 903 unit = DISKUNIT(dev); 904 905 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 906 return (ENXIO); 907 908 /* switch on ioctl type */ 909 910 switch (command) { 911 case DIOCSBAD: /* set bad144 info */ 912 if ((flag & FWRITE) == 0) 913 return EBADF; 914 s = splbio(); 915 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 916 splx(s); 917 return 0; 918 919 case DIOCGDINFO: /* get disk label */ 920 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 921 return 0; 922 923 case DIOCGPART: /* get partition info */ 924 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 925 ((struct partinfo *) addr)->part = 926 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 927 return 0; 928 929 case DIOCSDINFO: /* set disk label */ 930 if ((flag & FWRITE) == 0) 931 return EBADF; 932 error = setdisklabel(xy->sc_dk.dk_label, 933 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 934 xy->sc_dk.dk_cpulabel); 935 if (error == 0) { 936 if (xy->state == XY_DRIVE_NOLABEL) 937 xy->state = XY_DRIVE_ONLINE; 938 } 939 return error; 940 941 case DIOCWLABEL: /* change write status of disk label */ 942 if ((flag & FWRITE) == 0) 943 return EBADF; 944 if (*(int *) addr) 945 xy->flags |= XY_WLABEL; 946 else 947 xy->flags &= ~XY_WLABEL; 948 return 0; 949 950 case DIOCWDINFO: /* write disk label */ 951 if ((flag & FWRITE) == 0) 952 return EBADF; 953 error = setdisklabel(xy->sc_dk.dk_label, 954 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 955 xy->sc_dk.dk_cpulabel); 956 if (error == 0) { 957 if (xy->state == XY_DRIVE_NOLABEL) 958 xy->state = XY_DRIVE_ONLINE; 959 960 /* Simulate opening partition 0 so write succeeds. */ 961 xy->sc_dk.dk_openmask |= (1 << 0); 962 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 963 xystrategy, xy->sc_dk.dk_label, 964 xy->sc_dk.dk_cpulabel); 965 xy->sc_dk.dk_openmask = 966 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 967 } 968 return error; 969 970 case DIOSXDCMD: 971 xio = (struct xd_iocmd *) addr; 972 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 973 return (error); 974 return (xyc_ioctlcmd(xy, dev, xio)); 975 976 default: 977 return ENOTTY; 978 } 979 } 980 981 /* 982 * xyopen: open drive 983 */ 984 985 int 986 xyopen(dev, flag, fmt, p) 987 dev_t dev; 988 int flag, fmt; 989 struct proc *p; 990 { 991 int unit, part; 992 struct xy_softc *xy; 993 struct xyc_attach_args xa; 994 995 /* first, could it be a valid target? */ 996 997 unit = DISKUNIT(dev); 998 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 999 return (ENXIO); 1000 part = DISKPART(dev); 1001 1002 /* do we need to attach the drive? */ 1003 1004 if (xy->state == XY_DRIVE_UNKNOWN) { 1005 xa.driveno = xy->xy_drive; 1006 xa.fullmode = XY_SUB_WAIT; 1007 xa.booting = 0; 1008 xyattach((struct device *) xy->parent, 1009 (struct device *) xy, &xa); 1010 if (xy->state == XY_DRIVE_UNKNOWN) { 1011 return (EIO); 1012 } 1013 } 1014 /* check for partition */ 1015 1016 if (part != RAW_PART && 1017 (part >= xy->sc_dk.dk_label->d_npartitions || 1018 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1019 return (ENXIO); 1020 } 1021 /* set open masks */ 1022 1023 switch (fmt) { 1024 case S_IFCHR: 1025 xy->sc_dk.dk_copenmask |= (1 << part); 1026 break; 1027 case S_IFBLK: 1028 xy->sc_dk.dk_bopenmask |= (1 << part); 1029 break; 1030 } 1031 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1032 1033 return 0; 1034 } 1035 1036 int 1037 xyread(dev, uio, flags) 1038 dev_t dev; 1039 struct uio *uio; 1040 int flags; 1041 { 1042 1043 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1044 } 1045 1046 int 1047 xywrite(dev, uio, flags) 1048 dev_t dev; 1049 struct uio *uio; 1050 int flags; 1051 { 1052 1053 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1054 } 1055 1056 1057 /* 1058 * xysize: return size of a partition for a dump 1059 */ 1060 1061 int 1062 xysize(dev) 1063 dev_t dev; 1064 1065 { 1066 struct xy_softc *xysc; 1067 int unit, part, size, omask; 1068 1069 /* valid unit? */ 1070 unit = DISKUNIT(dev); 1071 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1072 return (-1); 1073 1074 part = DISKPART(dev); 1075 omask = xysc->sc_dk.dk_openmask & (1 << part); 1076 1077 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1078 return (-1); 1079 1080 /* do it */ 1081 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1082 size = -1; /* only give valid size for swap partitions */ 1083 else 1084 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1085 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1086 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1087 return (-1); 1088 return (size); 1089 } 1090 1091 /* 1092 * xystrategy: buffering system interface to xy. 1093 */ 1094 1095 void 1096 xystrategy(bp) 1097 struct buf *bp; 1098 1099 { 1100 struct xy_softc *xy; 1101 int s, unit; 1102 struct xyc_attach_args xa; 1103 struct disklabel *lp; 1104 daddr_t blkno; 1105 1106 unit = DISKUNIT(bp->b_dev); 1107 1108 /* check for live device */ 1109 1110 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1111 bp->b_blkno < 0 || 1112 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1113 bp->b_error = EINVAL; 1114 goto bad; 1115 } 1116 /* do we need to attach the drive? */ 1117 1118 if (xy->state == XY_DRIVE_UNKNOWN) { 1119 xa.driveno = xy->xy_drive; 1120 xa.fullmode = XY_SUB_WAIT; 1121 xa.booting = 0; 1122 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1123 if (xy->state == XY_DRIVE_UNKNOWN) { 1124 bp->b_error = EIO; 1125 goto bad; 1126 } 1127 } 1128 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1129 /* no I/O to unlabeled disks, unless raw partition */ 1130 bp->b_error = EIO; 1131 goto bad; 1132 } 1133 /* short circuit zero length request */ 1134 1135 if (bp->b_bcount == 0) 1136 goto done; 1137 1138 /* check bounds with label (disksubr.c). Determine the size of the 1139 * transfer, and make sure it is within the boundaries of the 1140 * partition. Adjust transfer if needed, and signal errors or early 1141 * completion. */ 1142 1143 lp = xy->sc_dk.dk_label; 1144 1145 if (bounds_check_with_label(bp, lp, 1146 (xy->flags & XY_WLABEL) != 0) <= 0) 1147 goto done; 1148 1149 /* 1150 * Now convert the block number to absolute and put it in 1151 * terms of the device's logical block size. 1152 */ 1153 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1154 if (DISKPART(bp->b_dev) != RAW_PART) 1155 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1156 1157 bp->b_rawblkno = blkno; 1158 1159 /* 1160 * now we know we have a valid buf structure that we need to do I/O 1161 * on. 1162 */ 1163 s = splbio(); /* protect the queues */ 1164 1165 disksort_blkno(&xy->xyq, bp); 1166 1167 /* start 'em up */ 1168 1169 xyc_start(xy->parent, NULL); 1170 1171 /* done! */ 1172 1173 splx(s); 1174 return; 1175 1176 bad: /* tells upper layers we have an error */ 1177 bp->b_flags |= B_ERROR; 1178 done: /* tells upper layers we are done with this 1179 * buf */ 1180 bp->b_resid = bp->b_bcount; 1181 biodone(bp); 1182 } 1183 /* 1184 * end of {b,c}devsw functions 1185 */ 1186 1187 /* 1188 * i n t e r r u p t f u n c t i o n 1189 * 1190 * xycintr: hardware interrupt. 1191 */ 1192 int 1193 xycintr(v) 1194 void *v; 1195 1196 { 1197 struct xyc_softc *xycsc = v; 1198 1199 /* kick the event counter */ 1200 1201 xycsc->sc_intrcnt.ev_count++; 1202 1203 /* remove as many done IOPBs as possible */ 1204 1205 xyc_remove_iorq(xycsc); 1206 1207 /* start any iorq's already waiting */ 1208 1209 xyc_start(xycsc, NULL); 1210 1211 return (1); 1212 } 1213 /* 1214 * end of interrupt function 1215 */ 1216 1217 /* 1218 * i n t e r n a l f u n c t i o n s 1219 */ 1220 1221 /* 1222 * xyc_rqinit: fill out the fields of an I/O request 1223 */ 1224 1225 inline void 1226 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1227 struct xy_iorq *rq; 1228 struct xyc_softc *xyc; 1229 struct xy_softc *xy; 1230 int md; 1231 u_long blk; 1232 int cnt; 1233 caddr_t db; 1234 struct buf *bp; 1235 { 1236 rq->xyc = xyc; 1237 rq->xy = xy; 1238 rq->ttl = XYC_MAXTTL + 10; 1239 rq->mode = md; 1240 rq->tries = rq->errno = rq->lasterror = 0; 1241 rq->blockno = blk; 1242 rq->sectcnt = cnt; 1243 rq->dbuf = db; 1244 rq->buf = bp; 1245 } 1246 1247 /* 1248 * xyc_rqtopb: load up an IOPB based on an iorq 1249 */ 1250 1251 void 1252 xyc_rqtopb(iorq, iopb, cmd, subfun) 1253 struct xy_iorq *iorq; 1254 struct xy_iopb *iopb; 1255 int cmd, subfun; 1256 1257 { 1258 u_long block, dp; 1259 1260 /* normal IOPB case, standard stuff */ 1261 1262 /* chain bit handled later */ 1263 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1264 iopb->com = cmd; 1265 iopb->errno = 0; 1266 iopb->errs = 0; 1267 iopb->done = 0; 1268 if (iorq->xy) { 1269 iopb->unit = iorq->xy->xy_drive; 1270 iopb->dt = iorq->xy->drive_type; 1271 } else { 1272 iopb->unit = 0; 1273 iopb->dt = 0; 1274 } 1275 block = iorq->blockno; 1276 if (iorq->xy == NULL || block == 0) { 1277 iopb->sect = iopb->head = iopb->cyl = 0; 1278 } else { 1279 iopb->sect = block % iorq->xy->nsect; 1280 block = block / iorq->xy->nsect; 1281 iopb->head = block % iorq->xy->nhead; 1282 block = block / iorq->xy->nhead; 1283 iopb->cyl = block; 1284 } 1285 iopb->scnt = iorq->sectcnt; 1286 dp = (u_long) iorq->dbuf; 1287 if (iorq->dbuf == NULL) { 1288 iopb->dataa = 0; 1289 iopb->datar = 0; 1290 } else { 1291 iopb->dataa = (dp & 0xffff); 1292 iopb->datar = ((dp & 0xff0000) >> 16); 1293 } 1294 iopb->subfn = subfun; 1295 } 1296 1297 1298 /* 1299 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1300 */ 1301 1302 int 1303 xyc_unbusy(xyc, del) 1304 1305 struct xyc *xyc; 1306 int del; 1307 1308 { 1309 while (del-- > 0) { 1310 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1311 break; 1312 DELAY(1); 1313 } 1314 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1315 } 1316 1317 /* 1318 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1319 * note that NORM requests are handled seperately. 1320 */ 1321 int 1322 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1323 struct xyc_softc *xycsc; 1324 int cmd, subfn, unit, block, scnt; 1325 char *dptr; 1326 int fullmode; 1327 1328 { 1329 int submode = XY_STATE(fullmode); 1330 struct xy_iorq *iorq = xycsc->ciorq; 1331 struct xy_iopb *iopb = xycsc->ciopb; 1332 1333 /* 1334 * is someone else using the control iopq wait for it if we can 1335 */ 1336 start: 1337 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1338 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1339 return(XY_ERR_FAIL); 1340 goto start; 1341 } 1342 1343 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1344 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1345 iorq->mode = XY_SUB_FREE; 1346 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1347 } 1348 1349 /* init iorq/iopb */ 1350 1351 xyc_rqinit(iorq, xycsc, 1352 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1353 fullmode, block, scnt, dptr, NULL); 1354 1355 /* load IOPB from iorq */ 1356 1357 xyc_rqtopb(iorq, iopb, cmd, subfn); 1358 1359 /* submit it for processing */ 1360 1361 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1362 1363 return(XY_ERR_AOK); 1364 } 1365 1366 /* 1367 * xyc_startbuf 1368 * start a buffer for running 1369 */ 1370 1371 int 1372 xyc_startbuf(xycsc, xysc, bp) 1373 struct xyc_softc *xycsc; 1374 struct xy_softc *xysc; 1375 struct buf *bp; 1376 1377 { 1378 int partno, error; 1379 struct xy_iorq *iorq; 1380 struct xy_iopb *iopb; 1381 u_long block; 1382 1383 iorq = xysc->xyrq; 1384 iopb = iorq->iopb; 1385 1386 /* get buf */ 1387 1388 if (bp == NULL) 1389 panic("xyc_startbuf null buf"); 1390 1391 partno = DISKPART(bp->b_dev); 1392 #ifdef XYC_DEBUG 1393 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1394 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1395 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1396 bp->b_bcount, bp->b_data); 1397 #endif 1398 1399 /* 1400 * load request. 1401 * 1402 * note that iorq points to the buffer as mapped into DVMA space, 1403 * where as the bp->b_data points to its non-DVMA mapping. 1404 */ 1405 1406 block = bp->b_rawblkno; 1407 1408 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1409 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1410 if (error != 0) { 1411 printf("%s: warning: cannot load DMA map\n", 1412 xycsc->sc_dev.dv_xname); 1413 return (XY_ERR_FAIL); /* XXX: need some sort of 1414 * call-back scheme here? */ 1415 } 1416 1417 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1418 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1419 ? BUS_DMASYNC_PREREAD 1420 : BUS_DMASYNC_PREWRITE); 1421 1422 /* init iorq and load iopb from it */ 1423 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1424 bp->b_bcount / XYFM_BPS, 1425 (caddr_t)iorq->dmamap->dm_segs[0].ds_addr, 1426 bp); 1427 1428 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1429 1430 /* Instrumentation. */ 1431 disk_busy(&xysc->sc_dk); 1432 1433 return (XY_ERR_AOK); 1434 } 1435 1436 1437 /* 1438 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1439 * if ok. if it fail returns an error code. type is XY_SUB_*. 1440 * 1441 * note: caller frees iorq in all cases except NORM 1442 * 1443 * return value: 1444 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1445 * WAIT: XY_AOK (success), <error-code> (failed) 1446 * POLL: <same as WAIT> 1447 * NOQ : <same as NORM> 1448 * 1449 * there are three sources for i/o requests: 1450 * [1] xystrategy: normal block I/O, using "struct buf" system. 1451 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1452 * [3] open/ioctl: these are I/O requests done in the context of a process, 1453 * and the process should block until they are done. 1454 * 1455 * software state is stored in the iorq structure. each iorq has an 1456 * iopb structure. the hardware understands the iopb structure. 1457 * every command must go through an iopb. a 450 handles one iopb at a 1458 * time, where as a 451 can take them in chains. [the 450 claims it 1459 * can handle chains, but is appears to be buggy...] iopb are allocated 1460 * in DVMA space at boot up time. each disk gets one iopb, and the 1461 * controller gets one (for POLL and WAIT commands). what happens if 1462 * the iopb is busy? for i/o type [1], the buffers are queued at the 1463 * "buff" layer and * picked up later by the interrupt routine. for case 1464 * [2] we can only be blocked if there is a WAIT type I/O request being 1465 * run. since this can only happen when we are crashing, we wait a sec 1466 * and then steal the IOPB. for case [3] the process can sleep 1467 * on the iorq free list until some iopbs are avaliable. 1468 */ 1469 1470 1471 int 1472 xyc_submit_iorq(xycsc, iorq, type) 1473 struct xyc_softc *xycsc; 1474 struct xy_iorq *iorq; 1475 int type; 1476 1477 { 1478 struct xy_iopb *dmaiopb; 1479 1480 #ifdef XYC_DEBUG 1481 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1482 xycsc->sc_dev.dv_xname, iorq, type); 1483 #endif 1484 1485 /* first check and see if controller is busy */ 1486 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1487 #ifdef XYC_DEBUG 1488 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1489 #endif 1490 if (type == XY_SUB_NOQ) 1491 return (XY_ERR_FAIL); /* failed */ 1492 switch (type) { 1493 case XY_SUB_NORM: 1494 return XY_ERR_AOK; /* success */ 1495 case XY_SUB_WAIT: 1496 while (iorq->iopb->done == 0) { 1497 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1498 } 1499 return (iorq->errno); 1500 case XY_SUB_POLL: /* steal controller */ 1501 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1502 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1503 panic("xyc_submit_iorq: stuck xyc"); 1504 printf("%s: stole controller\n", 1505 xycsc->sc_dev.dv_xname); 1506 break; 1507 default: 1508 panic("xyc_submit_iorq adding"); 1509 } 1510 } 1511 1512 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1513 if (dmaiopb == NULL) { /* nothing doing? */ 1514 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1515 return(XY_ERR_AOK); 1516 panic("xyc_submit_iorq: xyc_chain failed!\n"); 1517 } 1518 1519 XYC_GO(xycsc->xyc, (u_long)dmaiopb); 1520 1521 /* command now running, wrap it up */ 1522 switch (type) { 1523 case XY_SUB_NORM: 1524 case XY_SUB_NOQ: 1525 return (XY_ERR_AOK); /* success */ 1526 case XY_SUB_WAIT: 1527 while (iorq->iopb->done == 0) { 1528 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1529 } 1530 return (iorq->errno); 1531 case XY_SUB_POLL: 1532 return (xyc_piodriver(xycsc, iorq)); 1533 default: 1534 panic("xyc_submit_iorq wrap up"); 1535 } 1536 panic("xyc_submit_iorq"); 1537 return 0; /* not reached */ 1538 } 1539 1540 1541 /* 1542 * xyc_chain: build a chain. return dvma address of first element in 1543 * the chain. iorq != NULL: means we only want that item on the chain. 1544 */ 1545 1546 struct xy_iopb * 1547 xyc_chain(xycsc, iorq) 1548 struct xyc_softc *xycsc; 1549 struct xy_iorq *iorq; 1550 1551 { 1552 int togo, chain, hand; 1553 1554 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1555 1556 /* 1557 * promote control IOPB to the top 1558 */ 1559 if (iorq == NULL) { 1560 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1561 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1562 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1563 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1564 } 1565 1566 /* 1567 * special case: if iorq != NULL then we have a POLL or WAIT request. 1568 * we let these take priority and do them first. 1569 */ 1570 if (iorq) { 1571 xycsc->xy_chain[0] = iorq; 1572 iorq->iopb->chen = 0; 1573 return(iorq->dmaiopb); 1574 } 1575 1576 /* 1577 * NORM case: do round robin and maybe chain (if allowed and possible) 1578 */ 1579 chain = 0; 1580 hand = xycsc->xy_hand; 1581 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1582 1583 for (togo = XYC_MAXIOPB; togo > 0; 1584 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1585 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1586 1587 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1588 xycsc->iopbase[hand].done) 1589 continue; /* not ready-for-i/o */ 1590 1591 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1592 iopb = xycsc->xy_chain[chain]->iopb; 1593 iopb->chen = 0; 1594 if (chain != 0) { 1595 /* adding a link to a chain */ 1596 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1597 prev_iopb->chen = 1; 1598 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1599 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1600 } else { 1601 /* head of chain */ 1602 iorq = xycsc->xy_chain[chain]; 1603 } 1604 chain++; 1605 1606 /* quit if chaining dis-allowed */ 1607 if (xycsc->no_ols) 1608 break; 1609 } 1610 1611 return(iorq ? iorq->dmaiopb : NULL); 1612 } 1613 1614 /* 1615 * xyc_piodriver 1616 * 1617 * programmed i/o driver. this function takes over the computer 1618 * and drains off the polled i/o request. it returns the status of the iorq 1619 * the caller is interesting in. 1620 */ 1621 int 1622 xyc_piodriver(xycsc, iorq) 1623 struct xyc_softc *xycsc; 1624 struct xy_iorq *iorq; 1625 1626 { 1627 int nreset = 0; 1628 int retval = 0; 1629 u_long res; 1630 #ifdef XYC_DEBUG 1631 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1632 #endif 1633 1634 while (iorq->iopb->done == 0) { 1635 1636 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1637 1638 /* we expect some progress soon */ 1639 if (res == XY_ERR_FAIL && nreset >= 2) { 1640 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1641 #ifdef XYC_DEBUG 1642 printf("xyc_piodriver: timeout\n"); 1643 #endif 1644 return (XY_ERR_FAIL); 1645 } 1646 if (res == XY_ERR_FAIL) { 1647 if (xyc_reset(xycsc, 0, 1648 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1649 XY_ERR_FAIL, 1650 0) == XY_ERR_FAIL) 1651 return (XY_ERR_FAIL); /* flushes all but POLL 1652 * requests, resets */ 1653 continue; 1654 } 1655 1656 xyc_remove_iorq(xycsc); /* may resubmit request */ 1657 1658 if (iorq->iopb->done == 0) 1659 xyc_start(xycsc, iorq); 1660 } 1661 1662 /* get return value */ 1663 1664 retval = iorq->errno; 1665 1666 #ifdef XYC_DEBUG 1667 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1668 iorq->errno, xyc_e2str(iorq->errno)); 1669 #endif 1670 1671 /* start up any bufs that have queued */ 1672 1673 xyc_start(xycsc, NULL); 1674 1675 return (retval); 1676 } 1677 1678 /* 1679 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1680 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1681 */ 1682 void 1683 xyc_xyreset(xycsc, xysc) 1684 struct xyc_softc *xycsc; 1685 struct xy_softc *xysc; 1686 1687 { 1688 struct xy_iopb tmpiopb; 1689 struct xy_iopb *iopb; 1690 int del; 1691 1692 iopb = xycsc->ciopb; 1693 1694 /* Save contents */ 1695 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1696 1697 iopb->chen = iopb->done = iopb->errs = 0; 1698 iopb->ien = 0; 1699 iopb->com = XYCMD_RST; 1700 iopb->unit = xysc->xy_drive; 1701 1702 XYC_GO(xycsc->xyc, (u_long)xycsc->ciorq->dmaiopb); 1703 1704 del = XYC_RESETUSEC; 1705 while (del > 0) { 1706 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1707 break; 1708 DELAY(1); 1709 del--; 1710 } 1711 1712 if (del <= 0 || iopb->errs) { 1713 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1714 xyc_e2str(iopb->errno)); 1715 del = xycsc->xyc->xyc_rsetup; 1716 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1717 panic("xyc_reset"); 1718 } else { 1719 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1720 } 1721 1722 /* Restore contents */ 1723 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1724 } 1725 1726 1727 /* 1728 * xyc_reset: reset everything: requests are marked as errors except 1729 * a polled request (which is resubmitted) 1730 */ 1731 int 1732 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1733 struct xyc_softc *xycsc; 1734 int quiet, error; 1735 struct xy_iorq *blastmode; 1736 struct xy_softc *xysc; 1737 1738 { 1739 int del = 0, lcv, retval = XY_ERR_AOK; 1740 1741 /* soft reset hardware */ 1742 1743 if (!quiet) 1744 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1745 del = xycsc->xyc->xyc_rsetup; 1746 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1747 if (del == XY_ERR_FAIL) { 1748 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1749 retval = XY_ERR_FAIL; 1750 } 1751 if (xysc) 1752 xyc_xyreset(xycsc, xysc); 1753 1754 /* fix queues based on "blast-mode" */ 1755 1756 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1757 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1758 1759 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1760 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1761 XY_STATE(iorq->mode) != XY_SUB_NORM) 1762 /* is it active? */ 1763 continue; 1764 1765 if (blastmode == XY_RSET_ALL || 1766 blastmode != iorq) { 1767 /* failed */ 1768 iorq->errno = error; 1769 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1770 switch (XY_STATE(iorq->mode)) { 1771 case XY_SUB_NORM: 1772 iorq->buf->b_error = EIO; 1773 iorq->buf->b_flags |= B_ERROR; 1774 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1775 1776 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1777 iorq->dmamap->dm_mapsize, 1778 (iorq->buf->b_flags & B_READ) 1779 ? BUS_DMASYNC_POSTREAD 1780 : BUS_DMASYNC_POSTWRITE); 1781 1782 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1783 1784 BUFQ_REMOVE(&iorq->xy->xyq, iorq->buf); 1785 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1786 (xycsc->reqs[lcv].buf->b_bcount - 1787 xycsc->reqs[lcv].buf->b_resid)); 1788 biodone(iorq->buf); 1789 iorq->mode = XY_SUB_FREE; 1790 break; 1791 case XY_SUB_WAIT: 1792 wakeup(iorq); 1793 case XY_SUB_POLL: 1794 iorq->mode = 1795 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1796 break; 1797 } 1798 1799 } else { 1800 1801 /* resubmit, no need to do anything here */ 1802 } 1803 } 1804 1805 /* 1806 * now, if stuff is waiting, start it. 1807 * since we just reset it should go 1808 */ 1809 xyc_start(xycsc, NULL); 1810 1811 return (retval); 1812 } 1813 1814 /* 1815 * xyc_start: start waiting buffers 1816 */ 1817 1818 void 1819 xyc_start(xycsc, iorq) 1820 struct xyc_softc *xycsc; 1821 struct xy_iorq *iorq; 1822 1823 { 1824 int lcv; 1825 struct xy_softc *xy; 1826 1827 if (iorq == NULL) { 1828 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1829 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1830 if (BUFQ_FIRST(&xy->xyq) == NULL) continue; 1831 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1832 xyc_startbuf(xycsc, xy, BUFQ_FIRST(&xy->xyq)); 1833 } 1834 } 1835 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1836 } 1837 1838 /* 1839 * xyc_remove_iorq: remove "done" IOPB's. 1840 */ 1841 1842 int 1843 xyc_remove_iorq(xycsc) 1844 struct xyc_softc *xycsc; 1845 1846 { 1847 int errno, rq, comm, errs; 1848 struct xyc *xyc = xycsc->xyc; 1849 u_long addr; 1850 struct xy_iopb *iopb; 1851 struct xy_iorq *iorq; 1852 struct buf *bp; 1853 1854 if (xyc->xyc_csr & XYC_DERR) { 1855 /* 1856 * DOUBLE ERROR: should never happen under normal use. This 1857 * error is so bad, you can't even tell which IOPB is bad, so 1858 * we dump them all. 1859 */ 1860 errno = XY_ERR_DERR; 1861 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1862 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1863 printf("%s: soft reset failed!\n", 1864 xycsc->sc_dev.dv_xname); 1865 panic("xyc_remove_iorq: controller DEAD"); 1866 } 1867 return (XY_ERR_AOK); 1868 } 1869 1870 /* 1871 * get iopb that is done, loop down the chain 1872 */ 1873 1874 if (xyc->xyc_csr & XYC_ERR) { 1875 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1876 } 1877 if (xyc->xyc_csr & XYC_IPND) { 1878 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1879 } 1880 1881 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1882 iorq = xycsc->xy_chain[rq]; 1883 if (iorq == NULL) break; /* done ! */ 1884 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1885 continue; /* free, or done */ 1886 iopb = iorq->iopb; 1887 if (iopb->done == 0) 1888 continue; /* not done yet */ 1889 1890 comm = iopb->com; 1891 errs = iopb->errs; 1892 1893 if (errs) 1894 iorq->errno = iopb->errno; 1895 else 1896 iorq->errno = 0; 1897 1898 /* handle non-fatal errors */ 1899 1900 if (errs && 1901 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1902 continue; /* AOK: we resubmitted it */ 1903 1904 1905 /* this iorq is now done (hasn't been restarted or anything) */ 1906 1907 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1908 xyc_perror(iorq, iopb, 0); 1909 1910 /* now, if read/write check to make sure we got all the data 1911 * we needed. (this may not be the case if we got an error in 1912 * the middle of a multisector request). */ 1913 1914 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1915 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1916 /* we just successfully processed a bad144 sector 1917 * note: if we are in bad 144 mode, the pointers have 1918 * been advanced already (see above) and are pointing 1919 * at the bad144 sector. to exit bad144 mode, we 1920 * must advance the pointers 1 sector and issue a new 1921 * request if there are still sectors left to process 1922 * 1923 */ 1924 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1925 1926 /* exit b144 mode */ 1927 iorq->mode = iorq->mode & (~XY_MODE_B144); 1928 1929 if (iorq->sectcnt) { /* more to go! */ 1930 iorq->lasterror = iorq->errno = iopb->errno = 0; 1931 iopb->errs = iopb->done = 0; 1932 iorq->tries = 0; 1933 iopb->scnt = iorq->sectcnt; 1934 iopb->cyl = iorq->blockno / 1935 iorq->xy->sectpercyl; 1936 iopb->head = 1937 (iorq->blockno / iorq->xy->nhead) % 1938 iorq->xy->nhead; 1939 iopb->sect = iorq->blockno % XYFM_BPS; 1940 addr = (u_long) iorq->dbuf; 1941 iopb->dataa = (addr & 0xffff); 1942 iopb->datar = ((addr & 0xff0000) >> 16); 1943 /* will resubit at end */ 1944 continue; 1945 } 1946 } 1947 /* final cleanup, totally done with this request */ 1948 1949 switch (XY_STATE(iorq->mode)) { 1950 case XY_SUB_NORM: 1951 bp = iorq->buf; 1952 if (errs) { 1953 bp->b_error = EIO; 1954 bp->b_flags |= B_ERROR; 1955 bp->b_resid = iorq->sectcnt * XYFM_BPS; 1956 } else { 1957 bp->b_resid = 0; /* done */ 1958 } 1959 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1960 iorq->dmamap->dm_mapsize, 1961 (iorq->buf->b_flags & B_READ) 1962 ? BUS_DMASYNC_POSTREAD 1963 : BUS_DMASYNC_POSTWRITE); 1964 1965 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1966 1967 BUFQ_REMOVE(&iorq->xy->xyq, bp); 1968 disk_unbusy(&iorq->xy->sc_dk, 1969 (bp->b_bcount - bp->b_resid)); 1970 iorq->mode = XY_SUB_FREE; 1971 biodone(bp); 1972 break; 1973 case XY_SUB_WAIT: 1974 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1975 wakeup(iorq); 1976 break; 1977 case XY_SUB_POLL: 1978 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1979 break; 1980 } 1981 } 1982 1983 return (XY_ERR_AOK); 1984 } 1985 1986 /* 1987 * xyc_perror: print error. 1988 * - if still_trying is true: we got an error, retried and got a 1989 * different error. in that case lasterror is the old error, 1990 * and errno is the new one. 1991 * - if still_trying is not true, then if we ever had an error it 1992 * is in lasterror. also, if iorq->errno == 0, then we recovered 1993 * from that error (otherwise iorq->errno == iorq->lasterror). 1994 */ 1995 void 1996 xyc_perror(iorq, iopb, still_trying) 1997 struct xy_iorq *iorq; 1998 struct xy_iopb *iopb; 1999 int still_trying; 2000 2001 { 2002 2003 int error = iorq->lasterror; 2004 2005 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 2006 : iorq->xyc->sc_dev.dv_xname); 2007 if (iorq->buf) 2008 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2009 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2010 printf("%s %d/%d/%d: ", 2011 (iopb->com == XYCMD_RD) ? "read" : "write", 2012 iopb->cyl, iopb->head, iopb->sect); 2013 printf("%s", xyc_e2str(error)); 2014 2015 if (still_trying) 2016 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 2017 else 2018 if (iorq->errno == 0) 2019 printf(" [recovered in %d tries]", iorq->tries); 2020 2021 printf("\n"); 2022 } 2023 2024 /* 2025 * xyc_error: non-fatal error encountered... recover. 2026 * return AOK if resubmitted, return FAIL if this iopb is done 2027 */ 2028 int 2029 xyc_error(xycsc, iorq, iopb, comm) 2030 struct xyc_softc *xycsc; 2031 struct xy_iorq *iorq; 2032 struct xy_iopb *iopb; 2033 int comm; 2034 2035 { 2036 int errno = iorq->errno; 2037 int erract = xyc_entoact(errno); 2038 int oldmode, advance; 2039 #ifdef __sparc__ 2040 int i; 2041 #endif 2042 2043 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2044 oldmode = iorq->mode; 2045 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2046 /* make xyc_start ignore us */ 2047 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 2048 iorq->mode = oldmode; 2049 } 2050 /* check for read/write to a sector in bad144 table if bad: redirect 2051 * request to bad144 area */ 2052 2053 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2054 (iorq->mode & XY_MODE_B144) == 0) { 2055 advance = iorq->sectcnt - iopb->scnt; 2056 XYC_ADVANCE(iorq, advance); 2057 #ifdef __sparc__ 2058 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2059 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2060 iorq->blockno % iorq->xy->nsect)) != -1) { 2061 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2062 * redirect */ 2063 iopb->errno = iopb->done = iopb->errs = 0; 2064 iopb->scnt = 1; 2065 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2066 /* second to last acyl */ 2067 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2068 * standard */ 2069 iopb->head = i / iorq->xy->nhead; 2070 iopb->sect = i % iorq->xy->nhead; 2071 /* will resubmit when we come out of remove_iorq */ 2072 return (XY_ERR_AOK); /* recovered! */ 2073 } 2074 #endif 2075 } 2076 2077 /* 2078 * it isn't a bad144 sector, must be real error! see if we can retry 2079 * it? 2080 */ 2081 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2082 xyc_perror(iorq, iopb, 1); /* inform of error state 2083 * change */ 2084 iorq->lasterror = errno; 2085 2086 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2087 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2088 iorq->tries++; 2089 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 2090 /* will resubmit at end of remove_iorq */ 2091 return (XY_ERR_AOK); /* recovered! */ 2092 } 2093 2094 /* failed to recover from this error */ 2095 return (XY_ERR_FAIL); 2096 } 2097 2098 /* 2099 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2100 */ 2101 void 2102 xyc_tick(arg) 2103 void *arg; 2104 2105 { 2106 struct xyc_softc *xycsc = arg; 2107 int lcv, s, reset = 0; 2108 2109 /* reduce ttl for each request if one goes to zero, reset xyc */ 2110 s = splbio(); 2111 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2112 if (xycsc->reqs[lcv].mode == 0 || 2113 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2114 continue; 2115 xycsc->reqs[lcv].ttl--; 2116 if (xycsc->reqs[lcv].ttl == 0) 2117 reset = 1; 2118 } 2119 if (reset) { 2120 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2121 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2122 } 2123 splx(s); 2124 2125 /* until next time */ 2126 2127 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2128 } 2129 2130 /* 2131 * xyc_ioctlcmd: this function provides a user level interface to the 2132 * controller via ioctl. this allows "format" programs to be written 2133 * in user code, and is also useful for some debugging. we return 2134 * an error code. called at user priority. 2135 * 2136 * XXX missing a few commands (see the 7053 driver for ideas) 2137 */ 2138 int 2139 xyc_ioctlcmd(xy, dev, xio) 2140 struct xy_softc *xy; 2141 dev_t dev; 2142 struct xd_iocmd *xio; 2143 2144 { 2145 int s, rqno, dummy = 0; 2146 caddr_t dvmabuf = NULL, buf = NULL; 2147 struct xyc_softc *xycsc; 2148 int rseg, error; 2149 bus_dma_segment_t seg; 2150 2151 /* check sanity of requested command */ 2152 2153 switch (xio->cmd) { 2154 2155 case XYCMD_NOP: /* no op: everything should be zero */ 2156 if (xio->subfn || xio->dptr || xio->dlen || 2157 xio->block || xio->sectcnt) 2158 return (EINVAL); 2159 break; 2160 2161 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2162 case XYCMD_WR: 2163 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2164 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2165 return (EINVAL); 2166 break; 2167 2168 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2169 return (EINVAL); 2170 2171 break; 2172 2173 default: 2174 return (EINVAL);/* ??? */ 2175 } 2176 2177 xycsc = xy->parent; 2178 2179 /* create DVMA buffer for request if needed */ 2180 if (xio->dlen) { 2181 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2182 &seg, &rseg, 2183 xio->dlen, &buf, 2184 (bus_addr_t *)&dvmabuf)) != 0) { 2185 return (error); 2186 } 2187 2188 if (xio->cmd == XYCMD_WR) { 2189 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2190 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2191 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2192 return (error); 2193 } 2194 } 2195 } 2196 /* do it! */ 2197 2198 error = 0; 2199 s = splbio(); 2200 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2201 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2202 if (rqno == XY_ERR_FAIL) { 2203 error = EIO; 2204 goto done; 2205 } 2206 xio->errno = xycsc->ciorq->errno; 2207 xio->tries = xycsc->ciorq->tries; 2208 XYC_DONE(xycsc, dummy); 2209 2210 if (xio->cmd == XYCMD_RD) 2211 error = copyout(buf, xio->dptr, xio->dlen); 2212 2213 done: 2214 splx(s); 2215 if (dvmabuf) { 2216 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2217 xio->dlen, buf); 2218 } 2219 return (error); 2220 } 2221 2222 /* 2223 * xyc_e2str: convert error code number into an error string 2224 */ 2225 char * 2226 xyc_e2str(no) 2227 int no; 2228 { 2229 switch (no) { 2230 case XY_ERR_FAIL: 2231 return ("Software fatal error"); 2232 case XY_ERR_DERR: 2233 return ("DOUBLE ERROR"); 2234 case XY_ERR_AOK: 2235 return ("Successful completion"); 2236 case XY_ERR_IPEN: 2237 return("Interrupt pending"); 2238 case XY_ERR_BCFL: 2239 return("Busy conflict"); 2240 case XY_ERR_TIMO: 2241 return("Operation timeout"); 2242 case XY_ERR_NHDR: 2243 return("Header not found"); 2244 case XY_ERR_HARD: 2245 return("Hard ECC error"); 2246 case XY_ERR_ICYL: 2247 return("Illegal cylinder address"); 2248 case XY_ERR_ISEC: 2249 return("Illegal sector address"); 2250 case XY_ERR_SMAL: 2251 return("Last sector too small"); 2252 case XY_ERR_SACK: 2253 return("Slave ACK error (non-existent memory)"); 2254 case XY_ERR_CHER: 2255 return("Cylinder and head/header error"); 2256 case XY_ERR_SRTR: 2257 return("Auto-seek retry successful"); 2258 case XY_ERR_WPRO: 2259 return("Write-protect error"); 2260 case XY_ERR_UIMP: 2261 return("Unimplemented command"); 2262 case XY_ERR_DNRY: 2263 return("Drive not ready"); 2264 case XY_ERR_SZER: 2265 return("Sector count zero"); 2266 case XY_ERR_DFLT: 2267 return("Drive faulted"); 2268 case XY_ERR_ISSZ: 2269 return("Illegal sector size"); 2270 case XY_ERR_SLTA: 2271 return("Self test A"); 2272 case XY_ERR_SLTB: 2273 return("Self test B"); 2274 case XY_ERR_SLTC: 2275 return("Self test C"); 2276 case XY_ERR_SOFT: 2277 return("Soft ECC error"); 2278 case XY_ERR_SFOK: 2279 return("Soft ECC error recovered"); 2280 case XY_ERR_IHED: 2281 return("Illegal head"); 2282 case XY_ERR_DSEQ: 2283 return("Disk sequencer error"); 2284 case XY_ERR_SEEK: 2285 return("Seek error"); 2286 default: 2287 return ("Unknown error"); 2288 } 2289 } 2290 2291 int 2292 xyc_entoact(errno) 2293 2294 int errno; 2295 2296 { 2297 switch (errno) { 2298 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2299 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2300 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2301 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2302 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2303 2304 return(XY_ERA_PROG); /* program error ! */ 2305 2306 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2307 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2308 case XY_ERR_SOFT: 2309 2310 return(XY_ERA_HARD); /* hard error, retry */ 2311 2312 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2313 2314 return(XY_ERA_RSET); /* hard error reset */ 2315 2316 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2317 2318 return(XY_ERA_SOFT); /* an FYI error */ 2319 2320 case XY_ERR_WPRO: 2321 2322 return(XY_ERA_WPRO); /* write protect */ 2323 } 2324 2325 return(XY_ERA_PROG); /* ??? */ 2326 } 2327
Indexes created Tue Sep 30 20:09:53 GMT 2025