xy.c revision 1.59
1 /* $NetBSD: xy.c,v 1.59 2005/06/03 22:00:34 tsutsui Exp $ */ 2 3 /* 4 * 5 * Copyright (c) 1995 Charles D. Cranor 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles D. Cranor. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * 36 * x y . c x y l o g i c s 4 5 0 / 4 5 1 s m d d r i v e r 37 * 38 * author: Chuck Cranor <chuck (at) ccrc.wustl.edu> 39 * started: 14-Sep-95 40 * references: [1] Xylogics Model 753 User's Manual 41 * part number: 166-753-001, Revision B, May 21, 1988. 42 * "Your Partner For Performance" 43 * [2] other NetBSD disk device drivers 44 * [3] Xylogics Model 450 User's Manual 45 * part number: 166-017-001, Revision B, 1983. 46 * [4] Addendum to Xylogics Model 450 Disk Controller User's 47 * Manual, Jan. 1985. 48 * [5] The 451 Controller, Rev. B3, September 2, 1986. 49 * [6] David Jones <dej (at) achilles.net>'s unfinished 450/451 driver 50 * 51 */ 52 53 #include <sys/cdefs.h> 54 __KERNEL_RCSID(0, "$NetBSD: xy.c,v 1.59 2005/06/03 22:00:34 tsutsui Exp $"); 55 56 #undef XYC_DEBUG /* full debug */ 57 #undef XYC_DIAG /* extra sanity checks */ 58 #if defined(DIAGNOSTIC) && !defined(XYC_DIAG) 59 #define XYC_DIAG /* link in with master DIAG option */ 60 #endif 61 62 #include <sys/param.h> 63 #include <sys/proc.h> 64 #include <sys/systm.h> 65 #include <sys/kernel.h> 66 #include <sys/file.h> 67 #include <sys/stat.h> 68 #include <sys/ioctl.h> 69 #include <sys/buf.h> 70 #include <sys/bufq.h> 71 #include <sys/uio.h> 72 #include <sys/malloc.h> 73 #include <sys/device.h> 74 #include <sys/disklabel.h> 75 #include <sys/disk.h> 76 #include <sys/syslog.h> 77 #include <sys/dkbad.h> 78 #include <sys/conf.h> 79 80 #include <machine/bus.h> 81 #include <machine/intr.h> 82 83 #if defined(__sparc__) || defined(sun3) 84 #include <dev/sun/disklabel.h> 85 #endif 86 87 #include <dev/vme/vmereg.h> 88 #include <dev/vme/vmevar.h> 89 90 #include <dev/vme/xyreg.h> 91 #include <dev/vme/xyvar.h> 92 #include <dev/vme/xio.h> 93 94 #include "locators.h" 95 96 /* 97 * macros 98 */ 99 100 /* 101 * XYC_GO: start iopb ADDR (DVMA addr in a u_long) on XYC 102 */ 103 #define XYC_GO(XYC, ADDR) { \ 104 (XYC)->xyc_addr_lo = ((ADDR) & 0xff); \ 105 (ADDR) = ((ADDR) >> 8); \ 106 (XYC)->xyc_addr_hi = ((ADDR) & 0xff); \ 107 (ADDR) = ((ADDR) >> 8); \ 108 (XYC)->xyc_reloc_lo = ((ADDR) & 0xff); \ 109 (ADDR) = ((ADDR) >> 8); \ 110 (XYC)->xyc_reloc_hi = (ADDR); \ 111 (XYC)->xyc_csr = XYC_GBSY; /* go! */ \ 112 } 113 114 /* 115 * XYC_DONE: don't need IORQ, get error code and free (done after xyc_cmd) 116 */ 117 118 #define XYC_DONE(SC,ER) { \ 119 if ((ER) == XY_ERR_AOK) { \ 120 (ER) = (SC)->ciorq->errno; \ 121 (SC)->ciorq->mode = XY_SUB_FREE; \ 122 wakeup((SC)->ciorq); \ 123 } \ 124 } 125 126 /* 127 * XYC_ADVANCE: advance iorq's pointers by a number of sectors 128 */ 129 130 #define XYC_ADVANCE(IORQ, N) { \ 131 if (N) { \ 132 (IORQ)->sectcnt -= (N); \ 133 (IORQ)->blockno += (N); \ 134 (IORQ)->dbuf += ((N)*XYFM_BPS); \ 135 } \ 136 } 137 138 /* 139 * note - addresses you can sleep on: 140 * [1] & of xy_softc's "state" (waiting for a chance to attach a drive) 141 * [2] & an iorq (waiting for an XY_SUB_WAIT iorq to finish) 142 */ 143 144 145 /* 146 * function prototypes 147 * "xyc_*" functions are internal, all others are external interfaces 148 */ 149 150 extern int pil_to_vme[]; /* from obio.c */ 151 152 /* internals */ 153 struct xy_iopb *xyc_chain(struct xyc_softc *, struct xy_iorq *); 154 int xyc_cmd(struct xyc_softc *, int, int, int, int, int, char *, int); 155 const char *xyc_e2str(int); 156 int xyc_entoact(int); 157 int xyc_error(struct xyc_softc *, struct xy_iorq *, 158 struct xy_iopb *, int); 159 int xyc_ioctlcmd(struct xy_softc *, dev_t dev, struct xd_iocmd *); 160 void xyc_perror(struct xy_iorq *, struct xy_iopb *, int); 161 int xyc_piodriver(struct xyc_softc *, struct xy_iorq *); 162 int xyc_remove_iorq(struct xyc_softc *); 163 int xyc_reset(struct xyc_softc *, int, struct xy_iorq *, int, 164 struct xy_softc *); 165 inline void xyc_rqinit(struct xy_iorq *, struct xyc_softc *, 166 struct xy_softc *, int, u_long, int, 167 caddr_t, struct buf *); 168 void xyc_rqtopb(struct xy_iorq *, struct xy_iopb *, int, int); 169 void xyc_start(struct xyc_softc *, struct xy_iorq *); 170 int xyc_startbuf(struct xyc_softc *, struct xy_softc *, struct buf *); 171 int xyc_submit_iorq(struct xyc_softc *, struct xy_iorq *, int); 172 void xyc_tick(void *); 173 int xyc_unbusy(struct xyc *, int); 174 void xyc_xyreset(struct xyc_softc *, struct xy_softc *); 175 int xy_dmamem_alloc(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 176 int *, bus_size_t, caddr_t *, bus_addr_t *); 177 void xy_dmamem_free(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 178 int, bus_size_t, caddr_t); 179 180 /* machine interrupt hook */ 181 int xycintr(void *); 182 183 /* autoconf */ 184 int xycmatch(struct device *, struct cfdata *, void *); 185 void xycattach(struct device *, struct device *, void *); 186 int xymatch(struct device *, struct cfdata *, void *); 187 void xyattach(struct device *, struct device *, void *); 188 static int xyc_probe(void *, bus_space_tag_t, bus_space_handle_t); 189 190 static void xydummystrat(struct buf *); 191 int xygetdisklabel(struct xy_softc *, void *); 192 193 /* 194 * cfattach's: device driver interface to autoconfig 195 */ 196 197 CFATTACH_DECL(xyc, sizeof(struct xyc_softc), 198 xycmatch, xycattach, NULL, NULL); 199 200 CFATTACH_DECL(xy, sizeof(struct xy_softc), 201 xymatch, xyattach, NULL, NULL); 202 203 extern struct cfdriver xy_cd; 204 205 dev_type_open(xyopen); 206 dev_type_close(xyclose); 207 dev_type_read(xyread); 208 dev_type_write(xywrite); 209 dev_type_ioctl(xyioctl); 210 dev_type_strategy(xystrategy); 211 dev_type_dump(xydump); 212 dev_type_size(xysize); 213 214 const struct bdevsw xy_bdevsw = { 215 xyopen, xyclose, xystrategy, xyioctl, xydump, xysize, D_DISK 216 }; 217 218 const struct cdevsw xy_cdevsw = { 219 xyopen, xyclose, xyread, xywrite, xyioctl, 220 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 221 }; 222 223 struct xyc_attach_args { /* this is the "aux" args to xyattach */ 224 int driveno; /* unit number */ 225 int fullmode; /* submit mode */ 226 int booting; /* are we booting or not? */ 227 }; 228 229 /* 230 * dkdriver 231 */ 232 233 struct dkdriver xydkdriver = { xystrategy }; 234 235 /* 236 * start: disk label fix code (XXX) 237 */ 238 239 static void *xy_labeldata; 240 241 static void 242 xydummystrat(bp) 243 struct buf *bp; 244 { 245 if (bp->b_bcount != XYFM_BPS) 246 panic("xydummystrat"); 247 bcopy(xy_labeldata, bp->b_data, XYFM_BPS); 248 bp->b_flags |= B_DONE; 249 bp->b_flags &= ~B_BUSY; 250 } 251 252 int 253 xygetdisklabel(xy, b) 254 struct xy_softc *xy; 255 void *b; 256 { 257 const char *err; 258 #if defined(__sparc__) || defined(sun3) 259 struct sun_disklabel *sdl; 260 #endif 261 262 /* We already have the label data in `b'; setup for dummy strategy */ 263 xy_labeldata = b; 264 265 /* Required parameter for readdisklabel() */ 266 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; 267 268 err = readdisklabel(MAKEDISKDEV(0, xy->sc_dev.dv_unit, RAW_PART), 269 xydummystrat, 270 xy->sc_dk.dk_label, xy->sc_dk.dk_cpulabel); 271 if (err) { 272 printf("%s: %s\n", xy->sc_dev.dv_xname, err); 273 return(XY_ERR_FAIL); 274 } 275 276 #if defined(__sparc__) || defined(sun3) 277 /* Ok, we have the label; fill in `pcyl' if there's SunOS magic */ 278 sdl = (struct sun_disklabel *)xy->sc_dk.dk_cpulabel->cd_block; 279 if (sdl->sl_magic == SUN_DKMAGIC) { 280 xy->pcyl = sdl->sl_pcylinders; 281 } else 282 #endif 283 { 284 printf("%s: WARNING: no `pcyl' in disk label.\n", 285 xy->sc_dev.dv_xname); 286 xy->pcyl = xy->sc_dk.dk_label->d_ncylinders + 287 xy->sc_dk.dk_label->d_acylinders; 288 printf("%s: WARNING: guessing pcyl=%d (ncyl+acyl)\n", 289 xy->sc_dev.dv_xname, xy->pcyl); 290 } 291 292 xy->ncyl = xy->sc_dk.dk_label->d_ncylinders; 293 xy->acyl = xy->sc_dk.dk_label->d_acylinders; 294 xy->nhead = xy->sc_dk.dk_label->d_ntracks; 295 xy->nsect = xy->sc_dk.dk_label->d_nsectors; 296 xy->sectpercyl = xy->nhead * xy->nsect; 297 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; /* not handled by 298 * sun->bsd */ 299 return(XY_ERR_AOK); 300 } 301 302 /* 303 * end: disk label fix code (XXX) 304 */ 305 306 /* 307 * Shorthand for allocating, mapping and loading a DMA buffer 308 */ 309 int 310 xy_dmamem_alloc(tag, map, seg, nsegp, len, kvap, dmap) 311 bus_dma_tag_t tag; 312 bus_dmamap_t map; 313 bus_dma_segment_t *seg; 314 int *nsegp; 315 bus_size_t len; 316 caddr_t *kvap; 317 bus_addr_t *dmap; 318 { 319 int nseg; 320 int error; 321 322 if ((error = bus_dmamem_alloc(tag, len, 0, 0, 323 seg, 1, &nseg, BUS_DMA_NOWAIT)) != 0) { 324 return (error); 325 } 326 327 if ((error = bus_dmamem_map(tag, seg, nseg, 328 len, kvap, 329 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 330 bus_dmamem_free(tag, seg, nseg); 331 return (error); 332 } 333 334 if ((error = bus_dmamap_load(tag, map, *kvap, len, NULL, 335 BUS_DMA_NOWAIT)) != 0) { 336 bus_dmamem_unmap(tag, *kvap, len); 337 bus_dmamem_free(tag, seg, nseg); 338 return (error); 339 } 340 341 *dmap = map->dm_segs[0].ds_addr; 342 *nsegp = nseg; 343 return (0); 344 } 345 346 void 347 xy_dmamem_free(tag, map, seg, nseg, len, kva) 348 bus_dma_tag_t tag; 349 bus_dmamap_t map; 350 bus_dma_segment_t *seg; 351 int nseg; 352 bus_size_t len; 353 caddr_t kva; 354 { 355 356 bus_dmamap_unload(tag, map); 357 bus_dmamem_unmap(tag, kva, len); 358 bus_dmamem_free(tag, seg, nseg); 359 } 360 361 362 /* 363 * a u t o c o n f i g f u n c t i o n s 364 */ 365 366 /* 367 * xycmatch: determine if xyc is present or not. we do a 368 * soft reset to detect the xyc. 369 */ 370 int 371 xyc_probe(arg, tag, handle) 372 void *arg; 373 bus_space_tag_t tag; 374 bus_space_handle_t handle; 375 { 376 struct xyc *xyc = (void *)handle; /* XXX */ 377 378 return ((xyc_unbusy(xyc, XYC_RESETUSEC) != XY_ERR_FAIL) ? 0 : EIO); 379 } 380 381 int xycmatch(parent, cf, aux) 382 struct device *parent; 383 struct cfdata *cf; 384 void *aux; 385 { 386 struct vme_attach_args *va = aux; 387 vme_chipset_tag_t ct = va->va_vct; 388 vme_am_t mod; 389 int error; 390 391 mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 392 if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod)) 393 return (0); 394 395 error = vme_probe(ct, va->r[0].offset, sizeof(struct xyc), 396 mod, VME_D16, xyc_probe, 0); 397 vme_space_free(va->va_vct, va->r[0].offset, sizeof(struct xyc), mod); 398 399 return (error == 0); 400 } 401 402 /* 403 * xycattach: attach controller 404 */ 405 void 406 xycattach(parent, self, aux) 407 struct device *parent, *self; 408 void *aux; 409 410 { 411 struct xyc_softc *xyc = (void *) self; 412 struct vme_attach_args *va = aux; 413 vme_chipset_tag_t ct = va->va_vct; 414 bus_space_tag_t bt; 415 bus_space_handle_t bh; 416 vme_intr_handle_t ih; 417 vme_am_t mod; 418 struct xyc_attach_args xa; 419 int lcv, res, error; 420 bus_dma_segment_t seg; 421 int rseg; 422 vme_mapresc_t resc; 423 bus_addr_t busaddr; 424 425 /* get addressing and intr level stuff from autoconfig and load it 426 * into our xyc_softc. */ 427 428 mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 429 430 if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod)) 431 panic("xyc: vme alloc"); 432 433 if (vme_space_map(ct, va->r[0].offset, sizeof(struct xyc), 434 mod, VME_D16, 0, &bt, &bh, &resc) != 0) 435 panic("xyc: vme_map"); 436 437 xyc->xyc = (struct xyc *) bh; /* XXX */ 438 xyc->ipl = va->ilevel; 439 xyc->vector = va->ivector; 440 xyc->no_ols = 0; /* XXX should be from config */ 441 442 for (lcv = 0; lcv < XYC_MAXDEV; lcv++) 443 xyc->sc_drives[lcv] = (struct xy_softc *) 0; 444 445 /* 446 * allocate and zero buffers 447 * check boundaries of the KVA's ... all IOPBs must reside in 448 * the same 64K region. 449 */ 450 451 /* Get DMA handle for misc. transfers */ 452 if ((error = vme_dmamap_create( 453 ct, /* VME chip tag */ 454 MAXPHYS, /* size */ 455 VME_AM_A24, /* address modifier */ 456 VME_D16, /* data size */ 457 0, /* swap */ 458 1, /* nsegments */ 459 MAXPHYS, /* maxsegsz */ 460 0, /* boundary */ 461 BUS_DMA_NOWAIT, 462 &xyc->auxmap)) != 0) { 463 464 printf("%s: DMA buffer map create error %d\n", 465 xyc->sc_dev.dv_xname, error); 466 return; 467 } 468 469 /* Get DMA handle for mapping iorq descriptors */ 470 if ((error = vme_dmamap_create( 471 ct, /* VME chip tag */ 472 XYC_MAXIOPB * sizeof(struct xy_iopb), 473 VME_AM_A24, /* address modifier */ 474 VME_D16, /* data size */ 475 0, /* swap */ 476 1, /* nsegments */ 477 XYC_MAXIOPB * sizeof(struct xy_iopb), 478 64*1024, /* boundary */ 479 BUS_DMA_NOWAIT, 480 &xyc->iopmap)) != 0) { 481 482 printf("%s: DMA buffer map create error %d\n", 483 xyc->sc_dev.dv_xname, error); 484 return; 485 } 486 487 /* Get DMA buffer for iorq descriptors */ 488 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->iopmap, &seg, &rseg, 489 XYC_MAXIOPB * sizeof(struct xy_iopb), 490 (caddr_t *)&xyc->iopbase, 491 &busaddr)) != 0) { 492 printf("%s: DMA buffer alloc error %d\n", 493 xyc->sc_dev.dv_xname, error); 494 return; 495 } 496 xyc->dvmaiopb = (struct xy_iopb *)(u_long)BUS_ADDR_PADDR(busaddr); 497 498 bzero(xyc->iopbase, XYC_MAXIOPB * sizeof(struct xy_iopb)); 499 500 xyc->reqs = (struct xy_iorq *) 501 malloc(XYC_MAXIOPB * sizeof(struct xy_iorq), 502 M_DEVBUF, M_NOWAIT|M_ZERO); 503 if (xyc->reqs == NULL) 504 panic("xyc malloc"); 505 506 /* 507 * init iorq to iopb pointers, and non-zero fields in the 508 * iopb which never change. 509 */ 510 511 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 512 xyc->xy_chain[lcv] = NULL; 513 xyc->reqs[lcv].iopb = &xyc->iopbase[lcv]; 514 xyc->reqs[lcv].dmaiopb = &xyc->dvmaiopb[lcv]; 515 xyc->iopbase[lcv].asr = 1; /* always the same */ 516 xyc->iopbase[lcv].eef = 1; /* always the same */ 517 xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */ 518 xyc->iopbase[lcv].aud = 1; /* always the same */ 519 xyc->iopbase[lcv].relo = 1; /* always the same */ 520 xyc->iopbase[lcv].thro = XY_THRO;/* always the same */ 521 522 if ((error = vme_dmamap_create( 523 ct, /* VME chip tag */ 524 MAXPHYS, /* size */ 525 VME_AM_A24, /* address modifier */ 526 VME_D16, /* data size */ 527 0, /* swap */ 528 1, /* nsegments */ 529 MAXPHYS, /* maxsegsz */ 530 0, /* boundary */ 531 BUS_DMA_NOWAIT, 532 &xyc->reqs[lcv].dmamap)) != 0) { 533 534 printf("%s: DMA buffer map create error %d\n", 535 xyc->sc_dev.dv_xname, error); 536 return; 537 } 538 } 539 xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */ 540 xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */ 541 xyc->xy_hand = 0; 542 543 /* read controller parameters and insure we have a 450/451 */ 544 545 error = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL); 546 res = xyc->ciopb->ctyp; 547 XYC_DONE(xyc, error); 548 if (res != XYCT_450) { 549 if (error) 550 printf(": %s: ", xyc_e2str(error)); 551 printf(": doesn't identify as a 450/451\n"); 552 return; 553 } 554 printf(": Xylogics 450/451"); 555 if (xyc->no_ols) 556 printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */ 557 printf("\n"); 558 if (error) { 559 printf("%s: error: %s\n", xyc->sc_dev.dv_xname, 560 xyc_e2str(error)); 561 return; 562 } 563 if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) { 564 printf("%s: 24 bit addressing turned off\n", 565 xyc->sc_dev.dv_xname); 566 printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n"); 567 printf("to enable 24 bit mode and this driver\n"); 568 return; 569 } 570 571 /* link in interrupt with higher level software */ 572 vme_intr_map(ct, va->ilevel, va->ivector, &ih); 573 vme_intr_establish(ct, ih, IPL_BIO, xycintr, xyc); 574 evcnt_attach_dynamic(&xyc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 575 xyc->sc_dev.dv_xname, "intr"); 576 577 callout_init(&xyc->sc_tick_ch); 578 579 /* now we must look for disks using autoconfig */ 580 xa.fullmode = XY_SUB_POLL; 581 xa.booting = 1; 582 583 for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++) 584 (void) config_found(self, (void *) &xa, NULL); 585 586 /* start the watchdog clock */ 587 callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc); 588 589 } 590 591 /* 592 * xymatch: probe for disk. 593 * 594 * note: we almost always say disk is present. this allows us to 595 * spin up and configure a disk after the system is booted (we can 596 * call xyattach!). 597 */ 598 int 599 xymatch(parent, cf, aux) 600 struct device *parent; 601 struct cfdata *cf; 602 void *aux; 603 { 604 struct xyc_attach_args *xa = aux; 605 606 /* looking for autoconf wildcard or exact match */ 607 608 if (cf->cf_loc[XYCCF_DRIVE] != XYCCF_DRIVE_DEFAULT && 609 cf->cf_loc[XYCCF_DRIVE] != xa->driveno) 610 return 0; 611 612 return 1; 613 614 } 615 616 /* 617 * xyattach: attach a disk. this can be called from autoconf and also 618 * from xyopen/xystrategy. 619 */ 620 void 621 xyattach(parent, self, aux) 622 struct device *parent, *self; 623 void *aux; 624 625 { 626 struct xy_softc *xy = (void *) self, *oxy; 627 struct xyc_softc *xyc = (void *) parent; 628 struct xyc_attach_args *xa = aux; 629 int spt, mb, blk, lcv, fmode, s = 0, newstate; 630 struct dkbad *dkb; 631 int rseg, error; 632 bus_dma_segment_t seg; 633 bus_addr_t busaddr; 634 caddr_t dmaddr; 635 caddr_t buf; 636 637 /* 638 * Always re-initialize the disk structure. We want statistics 639 * to start with a clean slate. 640 */ 641 bzero(&xy->sc_dk, sizeof(xy->sc_dk)); 642 xy->sc_dk.dk_driver = &xydkdriver; 643 xy->sc_dk.dk_name = xy->sc_dev.dv_xname; 644 645 /* if booting, init the xy_softc */ 646 647 if (xa->booting) { 648 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 649 xy->flags = 0; 650 xy->parent = xyc; 651 652 /* init queue of waiting bufs */ 653 654 bufq_alloc(&xy->xyq, BUFQ_DISKSORT|BUFQ_SORT_RAWBLOCK); 655 656 xy->xyrq = &xyc->reqs[xa->driveno]; 657 658 } 659 xy->xy_drive = xa->driveno; 660 fmode = xa->fullmode; 661 xyc->sc_drives[xa->driveno] = xy; 662 663 /* if not booting, make sure we are the only process in the attach for 664 * this drive. if locked out, sleep on it. */ 665 666 if (!xa->booting) { 667 s = splbio(); 668 while (xy->state == XY_DRIVE_ATTACHING) { 669 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 670 splx(s); 671 return; 672 } 673 } 674 printf("%s at %s", 675 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 676 } 677 678 /* we now have control */ 679 xy->state = XY_DRIVE_ATTACHING; 680 newstate = XY_DRIVE_UNKNOWN; 681 682 buf = NULL; 683 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->auxmap, &seg, &rseg, 684 XYFM_BPS, 685 (caddr_t *)&buf, 686 &busaddr)) != 0) { 687 printf("%s: DMA buffer alloc error %d\n", 688 xyc->sc_dev.dv_xname, error); 689 return; 690 } 691 dmaddr = (caddr_t)(u_long)BUS_ADDR_PADDR(busaddr); 692 693 /* first try and reset the drive */ 694 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 695 XYC_DONE(xyc, error); 696 if (error == XY_ERR_DNRY) { 697 printf(" drive %d: off-line\n", xa->driveno); 698 goto done; 699 } 700 if (error) { 701 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 702 goto done; 703 } 704 printf(" drive %d: ready", xa->driveno); 705 706 /* 707 * now set drive parameters (to semi-bogus values) so we can read the 708 * disk label. 709 */ 710 xy->pcyl = xy->ncyl = 1; 711 xy->acyl = 0; 712 xy->nhead = 1; 713 xy->nsect = 1; 714 xy->sectpercyl = 1; 715 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 716 xy->dkb.bt_bad[lcv].bt_cyl = 717 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 718 719 /* read disk label */ 720 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 721 xy->drive_type++) { 722 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 723 dmaddr, fmode); 724 XYC_DONE(xyc, error); 725 if (error == XY_ERR_AOK) break; 726 } 727 728 if (error != XY_ERR_AOK) { 729 printf("\n%s: reading disk label failed: %s\n", 730 xy->sc_dev.dv_xname, xyc_e2str(error)); 731 goto done; 732 } 733 printf(" (drive type %d)\n", xy->drive_type); 734 735 newstate = XY_DRIVE_NOLABEL; 736 737 xy->hw_spt = spt = 0; /* XXX needed ? */ 738 /* Attach the disk: must be before getdisklabel to malloc label */ 739 disk_attach(&xy->sc_dk); 740 741 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 742 goto done; 743 744 /* inform the user of what is up */ 745 printf("%s: <%s>, pcyl %d\n", xy->sc_dev.dv_xname, 746 buf, xy->pcyl); 747 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 748 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 749 xy->sc_dev.dv_xname, mb, xy->ncyl, xy->nhead, xy->nsect, 750 XYFM_BPS); 751 752 /* 753 * 450/451 stupidity: the drive type is encoded into the format 754 * of the disk. the drive type in the IOPB must match the drive 755 * type in the format, or you will not be able to do I/O to the 756 * disk (you get header not found errors). if you have two drives 757 * of different sizes that have the same drive type in their 758 * formatting then you are out of luck. 759 * 760 * this problem was corrected in the 753/7053. 761 */ 762 763 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 764 oxy = xyc->sc_drives[lcv]; 765 if (oxy == NULL || oxy == xy) continue; 766 if (oxy->drive_type != xy->drive_type) continue; 767 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 768 xy->nhead != oxy->nhead) { 769 printf("%s: %s and %s must be the same size!\n", 770 xyc->sc_dev.dv_xname, xy->sc_dev.dv_xname, 771 oxy->sc_dev.dv_xname); 772 panic("xy drive size mismatch"); 773 } 774 } 775 776 777 /* now set the real drive parameters! */ 778 779 blk = (xy->nsect - 1) + 780 ((xy->nhead - 1) * xy->nsect) + 781 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 782 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 783 XYC_DONE(xyc, error); 784 if (error) { 785 printf("%s: write drive size failed: %s\n", 786 xy->sc_dev.dv_xname, xyc_e2str(error)); 787 goto done; 788 } 789 newstate = XY_DRIVE_ONLINE; 790 791 /* 792 * read bad144 table. this table resides on the first sector of the 793 * last track of the disk (i.e. second cyl of "acyl" area). 794 */ 795 796 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 797 /* last cyl */ 798 (xy->nhead - 1) * xy->nsect; /* last head */ 799 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 800 dmaddr, fmode); 801 XYC_DONE(xyc, error); 802 if (error) { 803 printf("%s: reading bad144 failed: %s\n", 804 xy->sc_dev.dv_xname, xyc_e2str(error)); 805 goto done; 806 } 807 808 /* check dkbad for sanity */ 809 dkb = (struct dkbad *) buf; 810 for (lcv = 0; lcv < 126; lcv++) { 811 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 812 dkb->bt_bad[lcv].bt_cyl == 0) && 813 dkb->bt_bad[lcv].bt_trksec == 0xffff) 814 continue; /* blank */ 815 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 816 break; 817 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 818 break; 819 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 820 break; 821 } 822 if (lcv != 126) { 823 printf("%s: warning: invalid bad144 sector!\n", 824 xy->sc_dev.dv_xname); 825 } else { 826 bcopy(buf, &xy->dkb, XYFM_BPS); 827 } 828 829 done: 830 if (buf != NULL) { 831 xy_dmamem_free(xyc->dmatag, xyc->auxmap, 832 &seg, rseg, XYFM_BPS, buf); 833 } 834 835 xy->state = newstate; 836 if (!xa->booting) { 837 wakeup(&xy->state); 838 splx(s); 839 } 840 } 841 842 /* 843 * end of autoconfig functions 844 */ 845 846 /* 847 * { b , c } d e v s w f u n c t i o n s 848 */ 849 850 /* 851 * xyclose: close device 852 */ 853 int 854 xyclose(dev, flag, fmt, p) 855 dev_t dev; 856 int flag, fmt; 857 struct proc *p; 858 859 { 860 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 861 int part = DISKPART(dev); 862 863 /* clear mask bits */ 864 865 switch (fmt) { 866 case S_IFCHR: 867 xy->sc_dk.dk_copenmask &= ~(1 << part); 868 break; 869 case S_IFBLK: 870 xy->sc_dk.dk_bopenmask &= ~(1 << part); 871 break; 872 } 873 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 874 875 return 0; 876 } 877 878 /* 879 * xydump: crash dump system 880 */ 881 int 882 xydump(dev, blkno, va, size) 883 dev_t dev; 884 daddr_t blkno; 885 caddr_t va; 886 size_t size; 887 { 888 int unit, part; 889 struct xy_softc *xy; 890 891 unit = DISKUNIT(dev); 892 if (unit >= xy_cd.cd_ndevs) 893 return ENXIO; 894 part = DISKPART(dev); 895 896 xy = xy_cd.cd_devs[unit]; 897 898 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 899 'a' + part); 900 901 return ENXIO; 902 903 /* outline: globals: "dumplo" == sector number of partition to start 904 * dump at (convert to physical sector with partition table) 905 * "dumpsize" == size of dump in clicks "physmem" == size of physical 906 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 907 * physmem) 908 * 909 * dump a copy of physical memory to the dump device starting at sector 910 * "dumplo" in the swap partition (make sure > 0). map in pages as 911 * we go. use polled I/O. 912 * 913 * XXX how to handle NON_CONTIG? */ 914 915 } 916 917 /* 918 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 919 */ 920 int 921 xyioctl(dev, command, addr, flag, p) 922 dev_t dev; 923 u_long command; 924 caddr_t addr; 925 int flag; 926 struct proc *p; 927 928 { 929 struct xy_softc *xy; 930 struct xd_iocmd *xio; 931 int error, s, unit; 932 #ifdef __HAVE_OLD_DISKLABEL 933 struct disklabel newlabel; 934 #endif 935 struct disklabel *lp; 936 937 unit = DISKUNIT(dev); 938 939 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 940 return (ENXIO); 941 942 /* switch on ioctl type */ 943 944 switch (command) { 945 case DIOCSBAD: /* set bad144 info */ 946 if ((flag & FWRITE) == 0) 947 return EBADF; 948 s = splbio(); 949 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 950 splx(s); 951 return 0; 952 953 case DIOCGDINFO: /* get disk label */ 954 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 955 return 0; 956 #ifdef __HAVE_OLD_DISKLABEL 957 case ODIOCGDINFO: 958 newlabel = *(xy->sc_dk.dk_label); 959 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 960 return ENOTTY; 961 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 962 return 0; 963 #endif 964 965 case DIOCGPART: /* get partition info */ 966 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 967 ((struct partinfo *) addr)->part = 968 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 969 return 0; 970 971 case DIOCSDINFO: /* set disk label */ 972 #ifdef __HAVE_OLD_DISKLABEL 973 case ODIOCSDINFO: 974 if (command == ODIOCSDINFO) { 975 memset(&newlabel, 0, sizeof newlabel); 976 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 977 lp = &newlabel; 978 } else 979 #endif 980 lp = (struct disklabel *)addr; 981 982 if ((flag & FWRITE) == 0) 983 return EBADF; 984 error = setdisklabel(xy->sc_dk.dk_label, 985 lp, /* xy->sc_dk.dk_openmask : */ 0, 986 xy->sc_dk.dk_cpulabel); 987 if (error == 0) { 988 if (xy->state == XY_DRIVE_NOLABEL) 989 xy->state = XY_DRIVE_ONLINE; 990 } 991 return error; 992 993 case DIOCWLABEL: /* change write status of disk label */ 994 if ((flag & FWRITE) == 0) 995 return EBADF; 996 if (*(int *) addr) 997 xy->flags |= XY_WLABEL; 998 else 999 xy->flags &= ~XY_WLABEL; 1000 return 0; 1001 1002 case DIOCWDINFO: /* write disk label */ 1003 #ifdef __HAVE_OLD_DISKLABEL 1004 case ODIOCWDINFO: 1005 if (command == ODIOCWDINFO) { 1006 memset(&newlabel, 0, sizeof newlabel); 1007 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 1008 lp = &newlabel; 1009 } else 1010 #endif 1011 lp = (struct disklabel *)addr; 1012 1013 if ((flag & FWRITE) == 0) 1014 return EBADF; 1015 error = setdisklabel(xy->sc_dk.dk_label, 1016 lp, /* xy->sc_dk.dk_openmask : */ 0, 1017 xy->sc_dk.dk_cpulabel); 1018 if (error == 0) { 1019 if (xy->state == XY_DRIVE_NOLABEL) 1020 xy->state = XY_DRIVE_ONLINE; 1021 1022 /* Simulate opening partition 0 so write succeeds. */ 1023 xy->sc_dk.dk_openmask |= (1 << 0); 1024 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 1025 xystrategy, xy->sc_dk.dk_label, 1026 xy->sc_dk.dk_cpulabel); 1027 xy->sc_dk.dk_openmask = 1028 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1029 } 1030 return error; 1031 1032 case DIOSXDCMD: 1033 xio = (struct xd_iocmd *) addr; 1034 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1035 return (error); 1036 return (xyc_ioctlcmd(xy, dev, xio)); 1037 1038 default: 1039 return ENOTTY; 1040 } 1041 } 1042 1043 /* 1044 * xyopen: open drive 1045 */ 1046 1047 int 1048 xyopen(dev, flag, fmt, p) 1049 dev_t dev; 1050 int flag, fmt; 1051 struct proc *p; 1052 { 1053 int unit, part; 1054 struct xy_softc *xy; 1055 struct xyc_attach_args xa; 1056 1057 /* first, could it be a valid target? */ 1058 1059 unit = DISKUNIT(dev); 1060 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 1061 return (ENXIO); 1062 part = DISKPART(dev); 1063 1064 /* do we need to attach the drive? */ 1065 1066 if (xy->state == XY_DRIVE_UNKNOWN) { 1067 xa.driveno = xy->xy_drive; 1068 xa.fullmode = XY_SUB_WAIT; 1069 xa.booting = 0; 1070 xyattach((struct device *) xy->parent, 1071 (struct device *) xy, &xa); 1072 if (xy->state == XY_DRIVE_UNKNOWN) { 1073 return (EIO); 1074 } 1075 } 1076 /* check for partition */ 1077 1078 if (part != RAW_PART && 1079 (part >= xy->sc_dk.dk_label->d_npartitions || 1080 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1081 return (ENXIO); 1082 } 1083 /* set open masks */ 1084 1085 switch (fmt) { 1086 case S_IFCHR: 1087 xy->sc_dk.dk_copenmask |= (1 << part); 1088 break; 1089 case S_IFBLK: 1090 xy->sc_dk.dk_bopenmask |= (1 << part); 1091 break; 1092 } 1093 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1094 1095 return 0; 1096 } 1097 1098 int 1099 xyread(dev, uio, flags) 1100 dev_t dev; 1101 struct uio *uio; 1102 int flags; 1103 { 1104 1105 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1106 } 1107 1108 int 1109 xywrite(dev, uio, flags) 1110 dev_t dev; 1111 struct uio *uio; 1112 int flags; 1113 { 1114 1115 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1116 } 1117 1118 1119 /* 1120 * xysize: return size of a partition for a dump 1121 */ 1122 1123 int 1124 xysize(dev) 1125 dev_t dev; 1126 1127 { 1128 struct xy_softc *xysc; 1129 int unit, part, size, omask; 1130 1131 /* valid unit? */ 1132 unit = DISKUNIT(dev); 1133 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1134 return (-1); 1135 1136 part = DISKPART(dev); 1137 omask = xysc->sc_dk.dk_openmask & (1 << part); 1138 1139 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1140 return (-1); 1141 1142 /* do it */ 1143 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1144 size = -1; /* only give valid size for swap partitions */ 1145 else 1146 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1147 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1148 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1149 return (-1); 1150 return (size); 1151 } 1152 1153 /* 1154 * xystrategy: buffering system interface to xy. 1155 */ 1156 1157 void 1158 xystrategy(bp) 1159 struct buf *bp; 1160 1161 { 1162 struct xy_softc *xy; 1163 int s, unit; 1164 struct xyc_attach_args xa; 1165 struct disklabel *lp; 1166 daddr_t blkno; 1167 1168 unit = DISKUNIT(bp->b_dev); 1169 1170 /* check for live device */ 1171 1172 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1173 bp->b_blkno < 0 || 1174 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1175 bp->b_error = EINVAL; 1176 goto bad; 1177 } 1178 /* do we need to attach the drive? */ 1179 1180 if (xy->state == XY_DRIVE_UNKNOWN) { 1181 xa.driveno = xy->xy_drive; 1182 xa.fullmode = XY_SUB_WAIT; 1183 xa.booting = 0; 1184 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1185 if (xy->state == XY_DRIVE_UNKNOWN) { 1186 bp->b_error = EIO; 1187 goto bad; 1188 } 1189 } 1190 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1191 /* no I/O to unlabeled disks, unless raw partition */ 1192 bp->b_error = EIO; 1193 goto bad; 1194 } 1195 /* short circuit zero length request */ 1196 1197 if (bp->b_bcount == 0) 1198 goto done; 1199 1200 /* check bounds with label (disksubr.c). Determine the size of the 1201 * transfer, and make sure it is within the boundaries of the 1202 * partition. Adjust transfer if needed, and signal errors or early 1203 * completion. */ 1204 1205 lp = xy->sc_dk.dk_label; 1206 1207 if (bounds_check_with_label(&xy->sc_dk, bp, 1208 (xy->flags & XY_WLABEL) != 0) <= 0) 1209 goto done; 1210 1211 /* 1212 * Now convert the block number to absolute and put it in 1213 * terms of the device's logical block size. 1214 */ 1215 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1216 if (DISKPART(bp->b_dev) != RAW_PART) 1217 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1218 1219 bp->b_rawblkno = blkno; 1220 1221 /* 1222 * now we know we have a valid buf structure that we need to do I/O 1223 * on. 1224 */ 1225 s = splbio(); /* protect the queues */ 1226 1227 BUFQ_PUT(&xy->xyq, bp); 1228 1229 /* start 'em up */ 1230 1231 xyc_start(xy->parent, NULL); 1232 1233 /* done! */ 1234 1235 splx(s); 1236 return; 1237 1238 bad: /* tells upper layers we have an error */ 1239 bp->b_flags |= B_ERROR; 1240 done: /* tells upper layers we are done with this 1241 * buf */ 1242 bp->b_resid = bp->b_bcount; 1243 biodone(bp); 1244 } 1245 /* 1246 * end of {b,c}devsw functions 1247 */ 1248 1249 /* 1250 * i n t e r r u p t f u n c t i o n 1251 * 1252 * xycintr: hardware interrupt. 1253 */ 1254 int 1255 xycintr(v) 1256 void *v; 1257 1258 { 1259 struct xyc_softc *xycsc = v; 1260 1261 /* kick the event counter */ 1262 1263 xycsc->sc_intrcnt.ev_count++; 1264 1265 /* remove as many done IOPBs as possible */ 1266 1267 xyc_remove_iorq(xycsc); 1268 1269 /* start any iorq's already waiting */ 1270 1271 xyc_start(xycsc, NULL); 1272 1273 return (1); 1274 } 1275 /* 1276 * end of interrupt function 1277 */ 1278 1279 /* 1280 * i n t e r n a l f u n c t i o n s 1281 */ 1282 1283 /* 1284 * xyc_rqinit: fill out the fields of an I/O request 1285 */ 1286 1287 inline void 1288 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1289 struct xy_iorq *rq; 1290 struct xyc_softc *xyc; 1291 struct xy_softc *xy; 1292 int md; 1293 u_long blk; 1294 int cnt; 1295 caddr_t db; 1296 struct buf *bp; 1297 { 1298 rq->xyc = xyc; 1299 rq->xy = xy; 1300 rq->ttl = XYC_MAXTTL + 10; 1301 rq->mode = md; 1302 rq->tries = rq->errno = rq->lasterror = 0; 1303 rq->blockno = blk; 1304 rq->sectcnt = cnt; 1305 rq->dbuf = db; 1306 rq->buf = bp; 1307 } 1308 1309 /* 1310 * xyc_rqtopb: load up an IOPB based on an iorq 1311 */ 1312 1313 void 1314 xyc_rqtopb(iorq, iopb, cmd, subfun) 1315 struct xy_iorq *iorq; 1316 struct xy_iopb *iopb; 1317 int cmd, subfun; 1318 1319 { 1320 u_long block, dp; 1321 1322 /* normal IOPB case, standard stuff */ 1323 1324 /* chain bit handled later */ 1325 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1326 iopb->com = cmd; 1327 iopb->errno = 0; 1328 iopb->errs = 0; 1329 iopb->done = 0; 1330 if (iorq->xy) { 1331 iopb->unit = iorq->xy->xy_drive; 1332 iopb->dt = iorq->xy->drive_type; 1333 } else { 1334 iopb->unit = 0; 1335 iopb->dt = 0; 1336 } 1337 block = iorq->blockno; 1338 if (iorq->xy == NULL || block == 0) { 1339 iopb->sect = iopb->head = iopb->cyl = 0; 1340 } else { 1341 iopb->sect = block % iorq->xy->nsect; 1342 block = block / iorq->xy->nsect; 1343 iopb->head = block % iorq->xy->nhead; 1344 block = block / iorq->xy->nhead; 1345 iopb->cyl = block; 1346 } 1347 iopb->scnt = iorq->sectcnt; 1348 dp = (u_long) iorq->dbuf; 1349 if (iorq->dbuf == NULL) { 1350 iopb->dataa = 0; 1351 iopb->datar = 0; 1352 } else { 1353 iopb->dataa = (dp & 0xffff); 1354 iopb->datar = ((dp & 0xff0000) >> 16); 1355 } 1356 iopb->subfn = subfun; 1357 } 1358 1359 1360 /* 1361 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1362 */ 1363 1364 int 1365 xyc_unbusy(xyc, del) 1366 1367 struct xyc *xyc; 1368 int del; 1369 1370 { 1371 while (del-- > 0) { 1372 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1373 break; 1374 DELAY(1); 1375 } 1376 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1377 } 1378 1379 /* 1380 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1381 * note that NORM requests are handled separately. 1382 */ 1383 int 1384 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1385 struct xyc_softc *xycsc; 1386 int cmd, subfn, unit, block, scnt; 1387 char *dptr; 1388 int fullmode; 1389 1390 { 1391 int submode = XY_STATE(fullmode); 1392 struct xy_iorq *iorq = xycsc->ciorq; 1393 struct xy_iopb *iopb = xycsc->ciopb; 1394 1395 /* 1396 * is someone else using the control iopq wait for it if we can 1397 */ 1398 start: 1399 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1400 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1401 return(XY_ERR_FAIL); 1402 goto start; 1403 } 1404 1405 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1406 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1407 iorq->mode = XY_SUB_FREE; 1408 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1409 } 1410 1411 /* init iorq/iopb */ 1412 1413 xyc_rqinit(iorq, xycsc, 1414 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1415 fullmode, block, scnt, dptr, NULL); 1416 1417 /* load IOPB from iorq */ 1418 1419 xyc_rqtopb(iorq, iopb, cmd, subfn); 1420 1421 /* submit it for processing */ 1422 1423 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1424 1425 return(XY_ERR_AOK); 1426 } 1427 1428 /* 1429 * xyc_startbuf 1430 * start a buffer for running 1431 */ 1432 1433 int 1434 xyc_startbuf(xycsc, xysc, bp) 1435 struct xyc_softc *xycsc; 1436 struct xy_softc *xysc; 1437 struct buf *bp; 1438 1439 { 1440 int partno, error; 1441 struct xy_iorq *iorq; 1442 struct xy_iopb *iopb; 1443 u_long block; 1444 1445 iorq = xysc->xyrq; 1446 iopb = iorq->iopb; 1447 1448 /* get buf */ 1449 1450 if (bp == NULL) 1451 panic("xyc_startbuf null buf"); 1452 1453 partno = DISKPART(bp->b_dev); 1454 #ifdef XYC_DEBUG 1455 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1456 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1457 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1458 bp->b_bcount, bp->b_data); 1459 #endif 1460 1461 /* 1462 * load request. 1463 * 1464 * note that iorq points to the buffer as mapped into DVMA space, 1465 * where as the bp->b_data points to its non-DVMA mapping. 1466 */ 1467 1468 block = bp->b_rawblkno; 1469 1470 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1471 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1472 if (error != 0) { 1473 printf("%s: warning: cannot load DMA map\n", 1474 xycsc->sc_dev.dv_xname); 1475 return (XY_ERR_FAIL); /* XXX: need some sort of 1476 * call-back scheme here? */ 1477 } 1478 1479 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1480 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1481 ? BUS_DMASYNC_PREREAD 1482 : BUS_DMASYNC_PREWRITE); 1483 1484 /* init iorq and load iopb from it */ 1485 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1486 bp->b_bcount / XYFM_BPS, 1487 (caddr_t)(u_long)iorq->dmamap->dm_segs[0].ds_addr, 1488 bp); 1489 1490 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1491 1492 /* Instrumentation. */ 1493 disk_busy(&xysc->sc_dk); 1494 1495 return (XY_ERR_AOK); 1496 } 1497 1498 1499 /* 1500 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1501 * if ok. if it fail returns an error code. type is XY_SUB_*. 1502 * 1503 * note: caller frees iorq in all cases except NORM 1504 * 1505 * return value: 1506 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1507 * WAIT: XY_AOK (success), <error-code> (failed) 1508 * POLL: <same as WAIT> 1509 * NOQ : <same as NORM> 1510 * 1511 * there are three sources for i/o requests: 1512 * [1] xystrategy: normal block I/O, using "struct buf" system. 1513 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1514 * [3] open/ioctl: these are I/O requests done in the context of a process, 1515 * and the process should block until they are done. 1516 * 1517 * software state is stored in the iorq structure. each iorq has an 1518 * iopb structure. the hardware understands the iopb structure. 1519 * every command must go through an iopb. a 450 handles one iopb at a 1520 * time, where as a 451 can take them in chains. [the 450 claims it 1521 * can handle chains, but is appears to be buggy...] iopb are allocated 1522 * in DVMA space at boot up time. each disk gets one iopb, and the 1523 * controller gets one (for POLL and WAIT commands). what happens if 1524 * the iopb is busy? for i/o type [1], the buffers are queued at the 1525 * "buff" layer and * picked up later by the interrupt routine. for case 1526 * [2] we can only be blocked if there is a WAIT type I/O request being 1527 * run. since this can only happen when we are crashing, we wait a sec 1528 * and then steal the IOPB. for case [3] the process can sleep 1529 * on the iorq free list until some iopbs are available. 1530 */ 1531 1532 1533 int 1534 xyc_submit_iorq(xycsc, iorq, type) 1535 struct xyc_softc *xycsc; 1536 struct xy_iorq *iorq; 1537 int type; 1538 1539 { 1540 struct xy_iopb *dmaiopb; 1541 1542 #ifdef XYC_DEBUG 1543 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1544 xycsc->sc_dev.dv_xname, iorq, type); 1545 #endif 1546 1547 /* first check and see if controller is busy */ 1548 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1549 #ifdef XYC_DEBUG 1550 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1551 #endif 1552 if (type == XY_SUB_NOQ) 1553 return (XY_ERR_FAIL); /* failed */ 1554 switch (type) { 1555 case XY_SUB_NORM: 1556 return XY_ERR_AOK; /* success */ 1557 case XY_SUB_WAIT: 1558 while (iorq->iopb->done == 0) { 1559 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1560 } 1561 return (iorq->errno); 1562 case XY_SUB_POLL: /* steal controller */ 1563 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1564 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1565 panic("xyc_submit_iorq: stuck xyc"); 1566 printf("%s: stole controller\n", 1567 xycsc->sc_dev.dv_xname); 1568 break; 1569 default: 1570 panic("xyc_submit_iorq adding"); 1571 } 1572 } 1573 1574 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1575 if (dmaiopb == NULL) { /* nothing doing? */ 1576 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1577 return(XY_ERR_AOK); 1578 panic("xyc_submit_iorq: xyc_chain failed!"); 1579 } 1580 1581 XYC_GO(xycsc->xyc, (u_long)dmaiopb); 1582 1583 /* command now running, wrap it up */ 1584 switch (type) { 1585 case XY_SUB_NORM: 1586 case XY_SUB_NOQ: 1587 return (XY_ERR_AOK); /* success */ 1588 case XY_SUB_WAIT: 1589 while (iorq->iopb->done == 0) { 1590 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1591 } 1592 return (iorq->errno); 1593 case XY_SUB_POLL: 1594 return (xyc_piodriver(xycsc, iorq)); 1595 default: 1596 panic("xyc_submit_iorq wrap up"); 1597 } 1598 panic("xyc_submit_iorq"); 1599 return 0; /* not reached */ 1600 } 1601 1602 1603 /* 1604 * xyc_chain: build a chain. return dvma address of first element in 1605 * the chain. iorq != NULL: means we only want that item on the chain. 1606 */ 1607 1608 struct xy_iopb * 1609 xyc_chain(xycsc, iorq) 1610 struct xyc_softc *xycsc; 1611 struct xy_iorq *iorq; 1612 1613 { 1614 int togo, chain, hand; 1615 1616 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1617 1618 /* 1619 * promote control IOPB to the top 1620 */ 1621 if (iorq == NULL) { 1622 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1623 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1624 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1625 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1626 } 1627 1628 /* 1629 * special case: if iorq != NULL then we have a POLL or WAIT request. 1630 * we let these take priority and do them first. 1631 */ 1632 if (iorq) { 1633 xycsc->xy_chain[0] = iorq; 1634 iorq->iopb->chen = 0; 1635 return(iorq->dmaiopb); 1636 } 1637 1638 /* 1639 * NORM case: do round robin and maybe chain (if allowed and possible) 1640 */ 1641 chain = 0; 1642 hand = xycsc->xy_hand; 1643 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1644 1645 for (togo = XYC_MAXIOPB; togo > 0; 1646 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1647 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1648 1649 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1650 xycsc->iopbase[hand].done) 1651 continue; /* not ready-for-i/o */ 1652 1653 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1654 iopb = xycsc->xy_chain[chain]->iopb; 1655 iopb->chen = 0; 1656 if (chain != 0) { 1657 /* adding a link to a chain */ 1658 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1659 prev_iopb->chen = 1; 1660 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1661 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1662 } else { 1663 /* head of chain */ 1664 iorq = xycsc->xy_chain[chain]; 1665 } 1666 chain++; 1667 1668 /* quit if chaining dis-allowed */ 1669 if (xycsc->no_ols) 1670 break; 1671 } 1672 1673 return(iorq ? iorq->dmaiopb : NULL); 1674 } 1675 1676 /* 1677 * xyc_piodriver 1678 * 1679 * programmed i/o driver. this function takes over the computer 1680 * and drains off the polled i/o request. it returns the status of the iorq 1681 * the caller is interesting in. 1682 */ 1683 int 1684 xyc_piodriver(xycsc, iorq) 1685 struct xyc_softc *xycsc; 1686 struct xy_iorq *iorq; 1687 1688 { 1689 int nreset = 0; 1690 int retval = 0; 1691 u_long res; 1692 #ifdef XYC_DEBUG 1693 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1694 #endif 1695 1696 while (iorq->iopb->done == 0) { 1697 1698 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1699 1700 /* we expect some progress soon */ 1701 if (res == XY_ERR_FAIL && nreset >= 2) { 1702 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1703 #ifdef XYC_DEBUG 1704 printf("xyc_piodriver: timeout\n"); 1705 #endif 1706 return (XY_ERR_FAIL); 1707 } 1708 if (res == XY_ERR_FAIL) { 1709 if (xyc_reset(xycsc, 0, 1710 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1711 XY_ERR_FAIL, 1712 0) == XY_ERR_FAIL) 1713 return (XY_ERR_FAIL); /* flushes all but POLL 1714 * requests, resets */ 1715 continue; 1716 } 1717 1718 xyc_remove_iorq(xycsc); /* may resubmit request */ 1719 1720 if (iorq->iopb->done == 0) 1721 xyc_start(xycsc, iorq); 1722 } 1723 1724 /* get return value */ 1725 1726 retval = iorq->errno; 1727 1728 #ifdef XYC_DEBUG 1729 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1730 iorq->errno, xyc_e2str(iorq->errno)); 1731 #endif 1732 1733 /* start up any bufs that have queued */ 1734 1735 xyc_start(xycsc, NULL); 1736 1737 return (retval); 1738 } 1739 1740 /* 1741 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1742 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1743 */ 1744 void 1745 xyc_xyreset(xycsc, xysc) 1746 struct xyc_softc *xycsc; 1747 struct xy_softc *xysc; 1748 1749 { 1750 struct xy_iopb tmpiopb; 1751 struct xy_iopb *iopb; 1752 int del; 1753 1754 iopb = xycsc->ciopb; 1755 1756 /* Save contents */ 1757 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1758 1759 iopb->chen = iopb->done = iopb->errs = 0; 1760 iopb->ien = 0; 1761 iopb->com = XYCMD_RST; 1762 iopb->unit = xysc->xy_drive; 1763 1764 XYC_GO(xycsc->xyc, (u_long)xycsc->ciorq->dmaiopb); 1765 1766 del = XYC_RESETUSEC; 1767 while (del > 0) { 1768 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1769 break; 1770 DELAY(1); 1771 del--; 1772 } 1773 1774 if (del <= 0 || iopb->errs) { 1775 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1776 xyc_e2str(iopb->errno)); 1777 del = xycsc->xyc->xyc_rsetup; 1778 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1779 panic("xyc_reset"); 1780 } else { 1781 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1782 } 1783 1784 /* Restore contents */ 1785 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1786 } 1787 1788 1789 /* 1790 * xyc_reset: reset everything: requests are marked as errors except 1791 * a polled request (which is resubmitted) 1792 */ 1793 int 1794 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1795 struct xyc_softc *xycsc; 1796 int quiet, error; 1797 struct xy_iorq *blastmode; 1798 struct xy_softc *xysc; 1799 1800 { 1801 int del = 0, lcv, retval = XY_ERR_AOK; 1802 1803 /* soft reset hardware */ 1804 1805 if (!quiet) 1806 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1807 del = xycsc->xyc->xyc_rsetup; 1808 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1809 if (del == XY_ERR_FAIL) { 1810 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1811 retval = XY_ERR_FAIL; 1812 } 1813 if (xysc) 1814 xyc_xyreset(xycsc, xysc); 1815 1816 /* fix queues based on "blast-mode" */ 1817 1818 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1819 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1820 1821 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1822 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1823 XY_STATE(iorq->mode) != XY_SUB_NORM) 1824 /* is it active? */ 1825 continue; 1826 1827 if (blastmode == XY_RSET_ALL || 1828 blastmode != iorq) { 1829 /* failed */ 1830 iorq->errno = error; 1831 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1832 switch (XY_STATE(iorq->mode)) { 1833 case XY_SUB_NORM: 1834 iorq->buf->b_error = EIO; 1835 iorq->buf->b_flags |= B_ERROR; 1836 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1837 1838 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1839 iorq->dmamap->dm_mapsize, 1840 (iorq->buf->b_flags & B_READ) 1841 ? BUS_DMASYNC_POSTREAD 1842 : BUS_DMASYNC_POSTWRITE); 1843 1844 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1845 1846 (void)BUFQ_GET(&iorq->xy->xyq); 1847 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1848 (xycsc->reqs[lcv].buf->b_bcount - 1849 xycsc->reqs[lcv].buf->b_resid), 1850 (xycsc->reqs[lcv].buf->b_flags & B_READ)); 1851 biodone(iorq->buf); 1852 iorq->mode = XY_SUB_FREE; 1853 break; 1854 case XY_SUB_WAIT: 1855 wakeup(iorq); 1856 case XY_SUB_POLL: 1857 iorq->mode = 1858 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1859 break; 1860 } 1861 1862 } else { 1863 1864 /* resubmit, no need to do anything here */ 1865 } 1866 } 1867 1868 /* 1869 * now, if stuff is waiting, start it. 1870 * since we just reset it should go 1871 */ 1872 xyc_start(xycsc, NULL); 1873 1874 return (retval); 1875 } 1876 1877 /* 1878 * xyc_start: start waiting buffers 1879 */ 1880 1881 void 1882 xyc_start(xycsc, iorq) 1883 struct xyc_softc *xycsc; 1884 struct xy_iorq *iorq; 1885 1886 { 1887 int lcv; 1888 struct xy_softc *xy; 1889 1890 if (iorq == NULL) { 1891 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1892 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1893 if (BUFQ_PEEK(&xy->xyq) == NULL) continue; 1894 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1895 xyc_startbuf(xycsc, xy, BUFQ_PEEK(&xy->xyq)); 1896 } 1897 } 1898 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1899 } 1900 1901 /* 1902 * xyc_remove_iorq: remove "done" IOPB's. 1903 */ 1904 1905 int 1906 xyc_remove_iorq(xycsc) 1907 struct xyc_softc *xycsc; 1908 1909 { 1910 int errno, rq, comm, errs; 1911 struct xyc *xyc = xycsc->xyc; 1912 u_long addr; 1913 struct xy_iopb *iopb; 1914 struct xy_iorq *iorq; 1915 struct buf *bp; 1916 1917 if (xyc->xyc_csr & XYC_DERR) { 1918 /* 1919 * DOUBLE ERROR: should never happen under normal use. This 1920 * error is so bad, you can't even tell which IOPB is bad, so 1921 * we dump them all. 1922 */ 1923 errno = XY_ERR_DERR; 1924 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1925 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1926 printf("%s: soft reset failed!\n", 1927 xycsc->sc_dev.dv_xname); 1928 panic("xyc_remove_iorq: controller DEAD"); 1929 } 1930 return (XY_ERR_AOK); 1931 } 1932 1933 /* 1934 * get iopb that is done, loop down the chain 1935 */ 1936 1937 if (xyc->xyc_csr & XYC_ERR) { 1938 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1939 } 1940 if (xyc->xyc_csr & XYC_IPND) { 1941 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1942 } 1943 1944 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1945 iorq = xycsc->xy_chain[rq]; 1946 if (iorq == NULL) break; /* done ! */ 1947 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1948 continue; /* free, or done */ 1949 iopb = iorq->iopb; 1950 if (iopb->done == 0) 1951 continue; /* not done yet */ 1952 1953 comm = iopb->com; 1954 errs = iopb->errs; 1955 1956 if (errs) 1957 iorq->errno = iopb->errno; 1958 else 1959 iorq->errno = 0; 1960 1961 /* handle non-fatal errors */ 1962 1963 if (errs && 1964 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1965 continue; /* AOK: we resubmitted it */ 1966 1967 1968 /* this iorq is now done (hasn't been restarted or anything) */ 1969 1970 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1971 xyc_perror(iorq, iopb, 0); 1972 1973 /* now, if read/write check to make sure we got all the data 1974 * we needed. (this may not be the case if we got an error in 1975 * the middle of a multisector request). */ 1976 1977 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1978 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1979 /* we just successfully processed a bad144 sector 1980 * note: if we are in bad 144 mode, the pointers have 1981 * been advanced already (see above) and are pointing 1982 * at the bad144 sector. to exit bad144 mode, we 1983 * must advance the pointers 1 sector and issue a new 1984 * request if there are still sectors left to process 1985 * 1986 */ 1987 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1988 1989 /* exit b144 mode */ 1990 iorq->mode = iorq->mode & (~XY_MODE_B144); 1991 1992 if (iorq->sectcnt) { /* more to go! */ 1993 iorq->lasterror = iorq->errno = iopb->errno = 0; 1994 iopb->errs = iopb->done = 0; 1995 iorq->tries = 0; 1996 iopb->scnt = iorq->sectcnt; 1997 iopb->cyl = iorq->blockno / 1998 iorq->xy->sectpercyl; 1999 iopb->head = 2000 (iorq->blockno / iorq->xy->nhead) % 2001 iorq->xy->nhead; 2002 iopb->sect = iorq->blockno % XYFM_BPS; 2003 addr = (u_long) iorq->dbuf; 2004 iopb->dataa = (addr & 0xffff); 2005 iopb->datar = ((addr & 0xff0000) >> 16); 2006 /* will resubit at end */ 2007 continue; 2008 } 2009 } 2010 /* final cleanup, totally done with this request */ 2011 2012 switch (XY_STATE(iorq->mode)) { 2013 case XY_SUB_NORM: 2014 bp = iorq->buf; 2015 if (errs) { 2016 bp->b_error = EIO; 2017 bp->b_flags |= B_ERROR; 2018 bp->b_resid = iorq->sectcnt * XYFM_BPS; 2019 } else { 2020 bp->b_resid = 0; /* done */ 2021 } 2022 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 2023 iorq->dmamap->dm_mapsize, 2024 (iorq->buf->b_flags & B_READ) 2025 ? BUS_DMASYNC_POSTREAD 2026 : BUS_DMASYNC_POSTWRITE); 2027 2028 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 2029 2030 (void)BUFQ_GET(&iorq->xy->xyq); 2031 disk_unbusy(&iorq->xy->sc_dk, 2032 (bp->b_bcount - bp->b_resid), 2033 (bp->b_flags & B_READ)); 2034 iorq->mode = XY_SUB_FREE; 2035 biodone(bp); 2036 break; 2037 case XY_SUB_WAIT: 2038 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2039 wakeup(iorq); 2040 break; 2041 case XY_SUB_POLL: 2042 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2043 break; 2044 } 2045 } 2046 2047 return (XY_ERR_AOK); 2048 } 2049 2050 /* 2051 * xyc_perror: print error. 2052 * - if still_trying is true: we got an error, retried and got a 2053 * different error. in that case lasterror is the old error, 2054 * and errno is the new one. 2055 * - if still_trying is not true, then if we ever had an error it 2056 * is in lasterror. also, if iorq->errno == 0, then we recovered 2057 * from that error (otherwise iorq->errno == iorq->lasterror). 2058 */ 2059 void 2060 xyc_perror(iorq, iopb, still_trying) 2061 struct xy_iorq *iorq; 2062 struct xy_iopb *iopb; 2063 int still_trying; 2064 2065 { 2066 2067 int error = iorq->lasterror; 2068 2069 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 2070 : iorq->xyc->sc_dev.dv_xname); 2071 if (iorq->buf) 2072 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2073 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2074 printf("%s %d/%d/%d: ", 2075 (iopb->com == XYCMD_RD) ? "read" : "write", 2076 iopb->cyl, iopb->head, iopb->sect); 2077 printf("%s", xyc_e2str(error)); 2078 2079 if (still_trying) 2080 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 2081 else 2082 if (iorq->errno == 0) 2083 printf(" [recovered in %d tries]", iorq->tries); 2084 2085 printf("\n"); 2086 } 2087 2088 /* 2089 * xyc_error: non-fatal error encountered... recover. 2090 * return AOK if resubmitted, return FAIL if this iopb is done 2091 */ 2092 int 2093 xyc_error(xycsc, iorq, iopb, comm) 2094 struct xyc_softc *xycsc; 2095 struct xy_iorq *iorq; 2096 struct xy_iopb *iopb; 2097 int comm; 2098 2099 { 2100 int errno = iorq->errno; 2101 int erract = xyc_entoact(errno); 2102 int oldmode, advance; 2103 #ifdef __sparc__ 2104 int i; 2105 #endif 2106 2107 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2108 oldmode = iorq->mode; 2109 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2110 /* make xyc_start ignore us */ 2111 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 2112 iorq->mode = oldmode; 2113 } 2114 /* check for read/write to a sector in bad144 table if bad: redirect 2115 * request to bad144 area */ 2116 2117 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2118 (iorq->mode & XY_MODE_B144) == 0) { 2119 advance = iorq->sectcnt - iopb->scnt; 2120 XYC_ADVANCE(iorq, advance); 2121 #ifdef __sparc__ 2122 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2123 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2124 iorq->blockno % iorq->xy->nsect)) != -1) { 2125 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2126 * redirect */ 2127 iopb->errno = iopb->done = iopb->errs = 0; 2128 iopb->scnt = 1; 2129 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2130 /* second to last acyl */ 2131 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2132 * standard */ 2133 iopb->head = i / iorq->xy->nhead; 2134 iopb->sect = i % iorq->xy->nhead; 2135 /* will resubmit when we come out of remove_iorq */ 2136 return (XY_ERR_AOK); /* recovered! */ 2137 } 2138 #endif 2139 } 2140 2141 /* 2142 * it isn't a bad144 sector, must be real error! see if we can retry 2143 * it? 2144 */ 2145 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2146 xyc_perror(iorq, iopb, 1); /* inform of error state 2147 * change */ 2148 iorq->lasterror = errno; 2149 2150 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2151 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2152 iorq->tries++; 2153 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 2154 /* will resubmit at end of remove_iorq */ 2155 return (XY_ERR_AOK); /* recovered! */ 2156 } 2157 2158 /* failed to recover from this error */ 2159 return (XY_ERR_FAIL); 2160 } 2161 2162 /* 2163 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2164 */ 2165 void 2166 xyc_tick(arg) 2167 void *arg; 2168 2169 { 2170 struct xyc_softc *xycsc = arg; 2171 int lcv, s, reset = 0; 2172 2173 /* reduce ttl for each request if one goes to zero, reset xyc */ 2174 s = splbio(); 2175 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2176 if (xycsc->reqs[lcv].mode == 0 || 2177 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2178 continue; 2179 xycsc->reqs[lcv].ttl--; 2180 if (xycsc->reqs[lcv].ttl == 0) 2181 reset = 1; 2182 } 2183 if (reset) { 2184 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2185 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2186 } 2187 splx(s); 2188 2189 /* until next time */ 2190 2191 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2192 } 2193 2194 /* 2195 * xyc_ioctlcmd: this function provides a user level interface to the 2196 * controller via ioctl. this allows "format" programs to be written 2197 * in user code, and is also useful for some debugging. we return 2198 * an error code. called at user priority. 2199 * 2200 * XXX missing a few commands (see the 7053 driver for ideas) 2201 */ 2202 int 2203 xyc_ioctlcmd(xy, dev, xio) 2204 struct xy_softc *xy; 2205 dev_t dev; 2206 struct xd_iocmd *xio; 2207 2208 { 2209 int s, rqno, dummy = 0; 2210 caddr_t dvmabuf = NULL, buf = NULL; 2211 struct xyc_softc *xycsc; 2212 int rseg, error; 2213 bus_dma_segment_t seg; 2214 2215 /* check sanity of requested command */ 2216 2217 switch (xio->cmd) { 2218 2219 case XYCMD_NOP: /* no op: everything should be zero */ 2220 if (xio->subfn || xio->dptr || xio->dlen || 2221 xio->block || xio->sectcnt) 2222 return (EINVAL); 2223 break; 2224 2225 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2226 case XYCMD_WR: 2227 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2228 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2229 return (EINVAL); 2230 break; 2231 2232 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2233 return (EINVAL); 2234 2235 break; 2236 2237 default: 2238 return (EINVAL);/* ??? */ 2239 } 2240 2241 xycsc = xy->parent; 2242 2243 /* create DVMA buffer for request if needed */ 2244 if (xio->dlen) { 2245 bus_addr_t busbuf; 2246 2247 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2248 &seg, &rseg, 2249 xio->dlen, &buf, 2250 &busbuf)) != 0) { 2251 return (error); 2252 } 2253 dvmabuf = (caddr_t)(u_long)BUS_ADDR_PADDR(busbuf); 2254 2255 if (xio->cmd == XYCMD_WR) { 2256 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2257 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2258 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2259 return (error); 2260 } 2261 } 2262 } 2263 /* do it! */ 2264 2265 error = 0; 2266 s = splbio(); 2267 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2268 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2269 if (rqno == XY_ERR_FAIL) { 2270 error = EIO; 2271 goto done; 2272 } 2273 xio->errno = xycsc->ciorq->errno; 2274 xio->tries = xycsc->ciorq->tries; 2275 XYC_DONE(xycsc, dummy); 2276 2277 if (xio->cmd == XYCMD_RD) 2278 error = copyout(buf, xio->dptr, xio->dlen); 2279 2280 done: 2281 splx(s); 2282 if (dvmabuf) { 2283 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2284 xio->dlen, buf); 2285 } 2286 return (error); 2287 } 2288 2289 /* 2290 * xyc_e2str: convert error code number into an error string 2291 */ 2292 const char * 2293 xyc_e2str(no) 2294 int no; 2295 { 2296 switch (no) { 2297 case XY_ERR_FAIL: 2298 return ("Software fatal error"); 2299 case XY_ERR_DERR: 2300 return ("DOUBLE ERROR"); 2301 case XY_ERR_AOK: 2302 return ("Successful completion"); 2303 case XY_ERR_IPEN: 2304 return("Interrupt pending"); 2305 case XY_ERR_BCFL: 2306 return("Busy conflict"); 2307 case XY_ERR_TIMO: 2308 return("Operation timeout"); 2309 case XY_ERR_NHDR: 2310 return("Header not found"); 2311 case XY_ERR_HARD: 2312 return("Hard ECC error"); 2313 case XY_ERR_ICYL: 2314 return("Illegal cylinder address"); 2315 case XY_ERR_ISEC: 2316 return("Illegal sector address"); 2317 case XY_ERR_SMAL: 2318 return("Last sector too small"); 2319 case XY_ERR_SACK: 2320 return("Slave ACK error (non-existent memory)"); 2321 case XY_ERR_CHER: 2322 return("Cylinder and head/header error"); 2323 case XY_ERR_SRTR: 2324 return("Auto-seek retry successful"); 2325 case XY_ERR_WPRO: 2326 return("Write-protect error"); 2327 case XY_ERR_UIMP: 2328 return("Unimplemented command"); 2329 case XY_ERR_DNRY: 2330 return("Drive not ready"); 2331 case XY_ERR_SZER: 2332 return("Sector count zero"); 2333 case XY_ERR_DFLT: 2334 return("Drive faulted"); 2335 case XY_ERR_ISSZ: 2336 return("Illegal sector size"); 2337 case XY_ERR_SLTA: 2338 return("Self test A"); 2339 case XY_ERR_SLTB: 2340 return("Self test B"); 2341 case XY_ERR_SLTC: 2342 return("Self test C"); 2343 case XY_ERR_SOFT: 2344 return("Soft ECC error"); 2345 case XY_ERR_SFOK: 2346 return("Soft ECC error recovered"); 2347 case XY_ERR_IHED: 2348 return("Illegal head"); 2349 case XY_ERR_DSEQ: 2350 return("Disk sequencer error"); 2351 case XY_ERR_SEEK: 2352 return("Seek error"); 2353 default: 2354 return ("Unknown error"); 2355 } 2356 } 2357 2358 int 2359 xyc_entoact(errno) 2360 2361 int errno; 2362 2363 { 2364 switch (errno) { 2365 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2366 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2367 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2368 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2369 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2370 2371 return(XY_ERA_PROG); /* program error ! */ 2372 2373 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2374 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2375 case XY_ERR_SOFT: 2376 2377 return(XY_ERA_HARD); /* hard error, retry */ 2378 2379 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2380 2381 return(XY_ERA_RSET); /* hard error reset */ 2382 2383 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2384 2385 return(XY_ERA_SOFT); /* an FYI error */ 2386 2387 case XY_ERR_WPRO: 2388 2389 return(XY_ERA_WPRO); /* write protect */ 2390 } 2391 2392 return(XY_ERA_PROG); /* ??? */ 2393 } 2394
Indexes created Tue Sep 30 07:10:03 GMT 2025