xy.c revision 1.69
1 /* $NetBSD: xy.c,v 1.69 2007/03/04 06:02:51 christos 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 1.69 2007/03/04 06:02:51 christos 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 #include <sys/kauth.h> 80 81 #include <machine/bus.h> 82 #include <machine/intr.h> 83 84 #if defined(__sparc__) || defined(sun3) 85 #include <dev/sun/disklabel.h> 86 #endif 87 88 #include <dev/vme/vmereg.h> 89 #include <dev/vme/vmevar.h> 90 91 #include <dev/vme/xyreg.h> 92 #include <dev/vme/xyvar.h> 93 #include <dev/vme/xio.h> 94 95 #include "locators.h" 96 97 /* 98 * macros 99 */ 100 101 /* 102 * XYC_GO: start iopb ADDR (DVMA addr in a u_long) on XYC 103 */ 104 #define XYC_GO(XYC, ADDR) { \ 105 u_long addr = (u_long)ADDR; \ 106 (XYC)->xyc_addr_lo = ((addr) & 0xff); \ 107 (addr) = ((addr) >> 8); \ 108 (XYC)->xyc_addr_hi = ((addr) & 0xff); \ 109 (addr) = ((addr) >> 8); \ 110 (XYC)->xyc_reloc_lo = ((addr) & 0xff); \ 111 (addr) = ((addr) >> 8); \ 112 (XYC)->xyc_reloc_hi = (addr); \ 113 (XYC)->xyc_csr = XYC_GBSY; /* go! */ \ 114 } 115 116 /* 117 * XYC_DONE: don't need IORQ, get error code and free (done after xyc_cmd) 118 */ 119 120 #define XYC_DONE(SC,ER) { \ 121 if ((ER) == XY_ERR_AOK) { \ 122 (ER) = (SC)->ciorq->errnum; \ 123 (SC)->ciorq->mode = XY_SUB_FREE; \ 124 wakeup((SC)->ciorq); \ 125 } \ 126 } 127 128 /* 129 * XYC_ADVANCE: advance iorq's pointers by a number of sectors 130 */ 131 132 #define XYC_ADVANCE(IORQ, N) { \ 133 if (N) { \ 134 (IORQ)->sectcnt -= (N); \ 135 (IORQ)->blockno += (N); \ 136 (IORQ)->dbuf += ((N)*XYFM_BPS); \ 137 } \ 138 } 139 140 /* 141 * note - addresses you can sleep on: 142 * [1] & of xy_softc's "state" (waiting for a chance to attach a drive) 143 * [2] & an iorq (waiting for an XY_SUB_WAIT iorq to finish) 144 */ 145 146 147 /* 148 * function prototypes 149 * "xyc_*" functions are internal, all others are external interfaces 150 */ 151 152 extern int pil_to_vme[]; /* from obio.c */ 153 154 /* internals */ 155 struct xy_iopb *xyc_chain(struct xyc_softc *, struct xy_iorq *); 156 int xyc_cmd(struct xyc_softc *, int, int, int, int, int, char *, int); 157 const char *xyc_e2str(int); 158 int xyc_entoact(int); 159 int xyc_error(struct xyc_softc *, struct xy_iorq *, 160 struct xy_iopb *, int); 161 int xyc_ioctlcmd(struct xy_softc *, dev_t dev, struct xd_iocmd *); 162 void xyc_perror(struct xy_iorq *, struct xy_iopb *, int); 163 int xyc_piodriver(struct xyc_softc *, struct xy_iorq *); 164 int xyc_remove_iorq(struct xyc_softc *); 165 int xyc_reset(struct xyc_softc *, int, struct xy_iorq *, int, 166 struct xy_softc *); 167 inline void xyc_rqinit(struct xy_iorq *, struct xyc_softc *, 168 struct xy_softc *, int, u_long, int, 169 void *, struct buf *); 170 void xyc_rqtopb(struct xy_iorq *, struct xy_iopb *, int, int); 171 void xyc_start(struct xyc_softc *, struct xy_iorq *); 172 int xyc_startbuf(struct xyc_softc *, struct xy_softc *, struct buf *); 173 int xyc_submit_iorq(struct xyc_softc *, struct xy_iorq *, int); 174 void xyc_tick(void *); 175 int xyc_unbusy(struct xyc *, int); 176 void xyc_xyreset(struct xyc_softc *, struct xy_softc *); 177 int xy_dmamem_alloc(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 178 int *, bus_size_t, void **, bus_addr_t *); 179 void xy_dmamem_free(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 180 int, bus_size_t, void *); 181 182 /* machine interrupt hook */ 183 int xycintr(void *); 184 185 /* autoconf */ 186 int xycmatch(struct device *, struct cfdata *, void *); 187 void xycattach(struct device *, struct device *, void *); 188 int xymatch(struct device *, struct cfdata *, void *); 189 void xyattach(struct device *, struct device *, void *); 190 static int xyc_probe(void *, bus_space_tag_t, bus_space_handle_t); 191 192 static void xydummystrat(struct buf *); 193 int xygetdisklabel(struct xy_softc *, void *); 194 195 /* 196 * cfattach's: device driver interface to autoconfig 197 */ 198 199 CFATTACH_DECL(xyc, sizeof(struct xyc_softc), 200 xycmatch, xycattach, NULL, NULL); 201 202 CFATTACH_DECL(xy, sizeof(struct xy_softc), 203 xymatch, xyattach, NULL, NULL); 204 205 extern struct cfdriver xy_cd; 206 207 dev_type_open(xyopen); 208 dev_type_close(xyclose); 209 dev_type_read(xyread); 210 dev_type_write(xywrite); 211 dev_type_ioctl(xyioctl); 212 dev_type_strategy(xystrategy); 213 dev_type_dump(xydump); 214 dev_type_size(xysize); 215 216 const struct bdevsw xy_bdevsw = { 217 xyopen, xyclose, xystrategy, xyioctl, xydump, xysize, D_DISK 218 }; 219 220 const struct cdevsw xy_cdevsw = { 221 xyopen, xyclose, xyread, xywrite, xyioctl, 222 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 223 }; 224 225 struct xyc_attach_args { /* this is the "aux" args to xyattach */ 226 int driveno; /* unit number */ 227 int fullmode; /* submit mode */ 228 int booting; /* are we booting or not? */ 229 }; 230 231 /* 232 * dkdriver 233 */ 234 235 struct dkdriver xydkdriver = { xystrategy }; 236 237 /* 238 * start: disk label fix code (XXX) 239 */ 240 241 static void *xy_labeldata; 242 243 static void 244 xydummystrat(bp) 245 struct buf *bp; 246 { 247 if (bp->b_bcount != XYFM_BPS) 248 panic("xydummystrat"); 249 bcopy(xy_labeldata, bp->b_data, XYFM_BPS); 250 bp->b_flags |= B_DONE; 251 bp->b_flags &= ~B_BUSY; 252 } 253 254 int 255 xygetdisklabel(xy, b) 256 struct xy_softc *xy; 257 void *b; 258 { 259 const char *err; 260 #if defined(__sparc__) || defined(sun3) 261 struct sun_disklabel *sdl; 262 #endif 263 264 /* We already have the label data in `b'; setup for dummy strategy */ 265 xy_labeldata = b; 266 267 /* Required parameter for readdisklabel() */ 268 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; 269 270 err = readdisklabel(MAKEDISKDEV(0, device_unit(&xy->sc_dev), RAW_PART), 271 xydummystrat, 272 xy->sc_dk.dk_label, xy->sc_dk.dk_cpulabel); 273 if (err) { 274 printf("%s: %s\n", xy->sc_dev.dv_xname, err); 275 return(XY_ERR_FAIL); 276 } 277 278 #if defined(__sparc__) || defined(sun3) 279 /* Ok, we have the label; fill in `pcyl' if there's SunOS magic */ 280 sdl = (struct sun_disklabel *)xy->sc_dk.dk_cpulabel->cd_block; 281 if (sdl->sl_magic == SUN_DKMAGIC) { 282 xy->pcyl = sdl->sl_pcylinders; 283 } else 284 #endif 285 { 286 printf("%s: WARNING: no `pcyl' in disk label.\n", 287 xy->sc_dev.dv_xname); 288 xy->pcyl = xy->sc_dk.dk_label->d_ncylinders + 289 xy->sc_dk.dk_label->d_acylinders; 290 printf("%s: WARNING: guessing pcyl=%d (ncyl+acyl)\n", 291 xy->sc_dev.dv_xname, xy->pcyl); 292 } 293 294 xy->ncyl = xy->sc_dk.dk_label->d_ncylinders; 295 xy->acyl = xy->sc_dk.dk_label->d_acylinders; 296 xy->nhead = xy->sc_dk.dk_label->d_ntracks; 297 xy->nsect = xy->sc_dk.dk_label->d_nsectors; 298 xy->sectpercyl = xy->nhead * xy->nsect; 299 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; /* not handled by 300 * sun->bsd */ 301 return(XY_ERR_AOK); 302 } 303 304 /* 305 * end: disk label fix code (XXX) 306 */ 307 308 /* 309 * Shorthand for allocating, mapping and loading a DMA buffer 310 */ 311 int 312 xy_dmamem_alloc(tag, map, seg, nsegp, len, kvap, dmap) 313 bus_dma_tag_t tag; 314 bus_dmamap_t map; 315 bus_dma_segment_t *seg; 316 int *nsegp; 317 bus_size_t len; 318 void * *kvap; 319 bus_addr_t *dmap; 320 { 321 int nseg; 322 int error; 323 324 if ((error = bus_dmamem_alloc(tag, len, 0, 0, 325 seg, 1, &nseg, BUS_DMA_NOWAIT)) != 0) { 326 return (error); 327 } 328 329 if ((error = bus_dmamem_map(tag, seg, nseg, 330 len, kvap, 331 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 332 bus_dmamem_free(tag, seg, nseg); 333 return (error); 334 } 335 336 if ((error = bus_dmamap_load(tag, map, *kvap, len, NULL, 337 BUS_DMA_NOWAIT)) != 0) { 338 bus_dmamem_unmap(tag, *kvap, len); 339 bus_dmamem_free(tag, seg, nseg); 340 return (error); 341 } 342 343 *dmap = map->dm_segs[0].ds_addr; 344 *nsegp = nseg; 345 return (0); 346 } 347 348 void 349 xy_dmamem_free(tag, map, seg, nseg, len, kva) 350 bus_dma_tag_t tag; 351 bus_dmamap_t map; 352 bus_dma_segment_t *seg; 353 int nseg; 354 bus_size_t len; 355 void * kva; 356 { 357 358 bus_dmamap_unload(tag, map); 359 bus_dmamem_unmap(tag, kva, len); 360 bus_dmamem_free(tag, seg, nseg); 361 } 362 363 364 /* 365 * a u t o c o n f i g f u n c t i o n s 366 */ 367 368 /* 369 * xycmatch: determine if xyc is present or not. we do a 370 * soft reset to detect the xyc. 371 */ 372 int 373 xyc_probe(arg, tag, handle) 374 void *arg; 375 bus_space_tag_t tag; 376 bus_space_handle_t handle; 377 { 378 struct xyc *xyc = (void *)handle; /* XXX */ 379 380 return ((xyc_unbusy(xyc, XYC_RESETUSEC) != XY_ERR_FAIL) ? 0 : EIO); 381 } 382 383 int xycmatch(parent, cf, aux) 384 struct device *parent; 385 struct cfdata *cf; 386 void *aux; 387 { 388 struct vme_attach_args *va = aux; 389 vme_chipset_tag_t ct = va->va_vct; 390 vme_am_t mod; 391 int error; 392 393 mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 394 if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod)) 395 return (0); 396 397 error = vme_probe(ct, va->r[0].offset, sizeof(struct xyc), 398 mod, VME_D16, xyc_probe, 0); 399 vme_space_free(va->va_vct, va->r[0].offset, sizeof(struct xyc), mod); 400 401 return (error == 0); 402 } 403 404 /* 405 * xycattach: attach controller 406 */ 407 void 408 xycattach(parent, self, aux) 409 struct device *parent, *self; 410 void *aux; 411 412 { 413 struct xyc_softc *xyc = (void *) self; 414 struct vme_attach_args *va = aux; 415 vme_chipset_tag_t ct = va->va_vct; 416 bus_space_tag_t bt; 417 bus_space_handle_t bh; 418 vme_intr_handle_t ih; 419 vme_am_t mod; 420 struct xyc_attach_args xa; 421 int lcv, res, error; 422 bus_dma_segment_t seg; 423 int rseg; 424 vme_mapresc_t resc; 425 bus_addr_t busaddr; 426 427 /* get addressing and intr level stuff from autoconfig and load it 428 * into our xyc_softc. */ 429 430 mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 431 432 if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod)) 433 panic("xyc: vme alloc"); 434 435 if (vme_space_map(ct, va->r[0].offset, sizeof(struct xyc), 436 mod, VME_D16, 0, &bt, &bh, &resc) != 0) 437 panic("xyc: vme_map"); 438 439 xyc->xyc = (struct xyc *) bh; /* XXX */ 440 xyc->ipl = va->ilevel; 441 xyc->vector = va->ivector; 442 xyc->no_ols = 0; /* XXX should be from config */ 443 444 for (lcv = 0; lcv < XYC_MAXDEV; lcv++) 445 xyc->sc_drives[lcv] = (struct xy_softc *) 0; 446 447 /* 448 * allocate and zero buffers 449 * check boundaries of the KVA's ... all IOPBs must reside in 450 * the same 64K region. 451 */ 452 453 /* Get DMA handle for misc. transfers */ 454 if ((error = vme_dmamap_create( 455 ct, /* VME chip tag */ 456 MAXPHYS, /* size */ 457 VME_AM_A24, /* address modifier */ 458 VME_D16, /* data size */ 459 0, /* swap */ 460 1, /* nsegments */ 461 MAXPHYS, /* maxsegsz */ 462 0, /* boundary */ 463 BUS_DMA_NOWAIT, 464 &xyc->auxmap)) != 0) { 465 466 printf("%s: DMA buffer map create error %d\n", 467 xyc->sc_dev.dv_xname, error); 468 return; 469 } 470 471 /* Get DMA handle for mapping iorq descriptors */ 472 if ((error = vme_dmamap_create( 473 ct, /* VME chip tag */ 474 XYC_MAXIOPB * sizeof(struct xy_iopb), 475 VME_AM_A24, /* address modifier */ 476 VME_D16, /* data size */ 477 0, /* swap */ 478 1, /* nsegments */ 479 XYC_MAXIOPB * sizeof(struct xy_iopb), 480 64*1024, /* boundary */ 481 BUS_DMA_NOWAIT, 482 &xyc->iopmap)) != 0) { 483 484 printf("%s: DMA buffer map create error %d\n", 485 xyc->sc_dev.dv_xname, error); 486 return; 487 } 488 489 /* Get DMA buffer for iorq descriptors */ 490 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->iopmap, &seg, &rseg, 491 XYC_MAXIOPB * sizeof(struct xy_iopb), 492 (void **)&xyc->iopbase, 493 &busaddr)) != 0) { 494 printf("%s: DMA buffer alloc error %d\n", 495 xyc->sc_dev.dv_xname, error); 496 return; 497 } 498 xyc->dvmaiopb = (struct xy_iopb *)(u_long)BUS_ADDR_PADDR(busaddr); 499 500 bzero(xyc->iopbase, XYC_MAXIOPB * sizeof(struct xy_iopb)); 501 502 xyc->reqs = (struct xy_iorq *) 503 malloc(XYC_MAXIOPB * sizeof(struct xy_iorq), 504 M_DEVBUF, M_NOWAIT|M_ZERO); 505 if (xyc->reqs == NULL) 506 panic("xyc malloc"); 507 508 /* 509 * init iorq to iopb pointers, and non-zero fields in the 510 * iopb which never change. 511 */ 512 513 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 514 xyc->xy_chain[lcv] = NULL; 515 xyc->reqs[lcv].iopb = &xyc->iopbase[lcv]; 516 xyc->reqs[lcv].dmaiopb = &xyc->dvmaiopb[lcv]; 517 xyc->iopbase[lcv].asr = 1; /* always the same */ 518 xyc->iopbase[lcv].eef = 1; /* always the same */ 519 xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */ 520 xyc->iopbase[lcv].aud = 1; /* always the same */ 521 xyc->iopbase[lcv].relo = 1; /* always the same */ 522 xyc->iopbase[lcv].thro = XY_THRO;/* always the same */ 523 524 if ((error = vme_dmamap_create( 525 ct, /* VME chip tag */ 526 MAXPHYS, /* size */ 527 VME_AM_A24, /* address modifier */ 528 VME_D16, /* data size */ 529 0, /* swap */ 530 1, /* nsegments */ 531 MAXPHYS, /* maxsegsz */ 532 0, /* boundary */ 533 BUS_DMA_NOWAIT, 534 &xyc->reqs[lcv].dmamap)) != 0) { 535 536 printf("%s: DMA buffer map create error %d\n", 537 xyc->sc_dev.dv_xname, error); 538 return; 539 } 540 } 541 xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */ 542 xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */ 543 xyc->xy_hand = 0; 544 545 /* read controller parameters and insure we have a 450/451 */ 546 547 error = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL); 548 res = xyc->ciopb->ctyp; 549 XYC_DONE(xyc, error); 550 if (res != XYCT_450) { 551 if (error) 552 printf(": %s: ", xyc_e2str(error)); 553 printf(": doesn't identify as a 450/451\n"); 554 return; 555 } 556 printf(": Xylogics 450/451"); 557 if (xyc->no_ols) 558 printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */ 559 printf("\n"); 560 if (error) { 561 printf("%s: error: %s\n", xyc->sc_dev.dv_xname, 562 xyc_e2str(error)); 563 return; 564 } 565 if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) { 566 printf("%s: 24 bit addressing turned off\n", 567 xyc->sc_dev.dv_xname); 568 printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n"); 569 printf("to enable 24 bit mode and this driver\n"); 570 return; 571 } 572 573 /* link in interrupt with higher level software */ 574 vme_intr_map(ct, va->ilevel, va->ivector, &ih); 575 vme_intr_establish(ct, ih, IPL_BIO, xycintr, xyc); 576 evcnt_attach_dynamic(&xyc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 577 xyc->sc_dev.dv_xname, "intr"); 578 579 callout_init(&xyc->sc_tick_ch); 580 581 /* now we must look for disks using autoconfig */ 582 xa.fullmode = XY_SUB_POLL; 583 xa.booting = 1; 584 585 for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++) 586 (void) config_found(self, (void *) &xa, NULL); 587 588 /* start the watchdog clock */ 589 callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc); 590 591 } 592 593 /* 594 * xymatch: probe for disk. 595 * 596 * note: we almost always say disk is present. this allows us to 597 * spin up and configure a disk after the system is booted (we can 598 * call xyattach!). 599 */ 600 int 601 xymatch(parent, cf, aux) 602 struct device *parent; 603 struct cfdata *cf; 604 void *aux; 605 { 606 struct xyc_attach_args *xa = aux; 607 608 /* looking for autoconf wildcard or exact match */ 609 610 if (cf->cf_loc[XYCCF_DRIVE] != XYCCF_DRIVE_DEFAULT && 611 cf->cf_loc[XYCCF_DRIVE] != xa->driveno) 612 return 0; 613 614 return 1; 615 616 } 617 618 /* 619 * xyattach: attach a disk. this can be called from autoconf and also 620 * from xyopen/xystrategy. 621 */ 622 void 623 xyattach(parent, self, aux) 624 struct device *parent, *self; 625 void *aux; 626 627 { 628 struct xy_softc *xy = (void *) self, *oxy; 629 struct xyc_softc *xyc = (void *) parent; 630 struct xyc_attach_args *xa = aux; 631 int spt, mb, blk, lcv, fmode, s = 0, newstate; 632 struct dkbad *dkb; 633 int rseg, error; 634 bus_dma_segment_t seg; 635 bus_addr_t busaddr; 636 void * dmaddr; 637 void * buf; 638 639 /* 640 * Always re-initialize the disk structure. We want statistics 641 * to start with a clean slate. 642 */ 643 bzero(&xy->sc_dk, sizeof(xy->sc_dk)); 644 xy->sc_dk.dk_driver = &xydkdriver; 645 xy->sc_dk.dk_name = xy->sc_dev.dv_xname; 646 647 /* if booting, init the xy_softc */ 648 649 if (xa->booting) { 650 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 651 xy->flags = 0; 652 xy->parent = xyc; 653 654 /* init queue of waiting bufs */ 655 656 bufq_alloc(&xy->xyq, "disksort", BUFQ_SORT_RAWBLOCK); 657 658 xy->xyrq = &xyc->reqs[xa->driveno]; 659 660 } 661 xy->xy_drive = xa->driveno; 662 fmode = xa->fullmode; 663 xyc->sc_drives[xa->driveno] = xy; 664 665 /* if not booting, make sure we are the only process in the attach for 666 * this drive. if locked out, sleep on it. */ 667 668 if (!xa->booting) { 669 s = splbio(); 670 while (xy->state == XY_DRIVE_ATTACHING) { 671 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 672 splx(s); 673 return; 674 } 675 } 676 printf("%s at %s", 677 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 678 } 679 680 /* we now have control */ 681 xy->state = XY_DRIVE_ATTACHING; 682 newstate = XY_DRIVE_UNKNOWN; 683 684 buf = NULL; 685 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->auxmap, &seg, &rseg, 686 XYFM_BPS, 687 (void **)&buf, 688 &busaddr)) != 0) { 689 printf("%s: DMA buffer alloc error %d\n", 690 xyc->sc_dev.dv_xname, error); 691 return; 692 } 693 dmaddr = (void *)(u_long)BUS_ADDR_PADDR(busaddr); 694 695 /* first try and reset the drive */ 696 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 697 XYC_DONE(xyc, error); 698 if (error == XY_ERR_DNRY) { 699 printf(" drive %d: off-line\n", xa->driveno); 700 goto done; 701 } 702 if (error) { 703 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 704 goto done; 705 } 706 printf(" drive %d: ready", xa->driveno); 707 708 /* 709 * now set drive parameters (to semi-bogus values) so we can read the 710 * disk label. 711 */ 712 xy->pcyl = xy->ncyl = 1; 713 xy->acyl = 0; 714 xy->nhead = 1; 715 xy->nsect = 1; 716 xy->sectpercyl = 1; 717 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 718 xy->dkb.bt_bad[lcv].bt_cyl = 719 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 720 721 /* read disk label */ 722 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 723 xy->drive_type++) { 724 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 725 dmaddr, fmode); 726 XYC_DONE(xyc, error); 727 if (error == XY_ERR_AOK) break; 728 } 729 730 if (error != XY_ERR_AOK) { 731 printf("\n%s: reading disk label failed: %s\n", 732 xy->sc_dev.dv_xname, xyc_e2str(error)); 733 goto done; 734 } 735 printf(" (drive type %d)\n", xy->drive_type); 736 737 newstate = XY_DRIVE_NOLABEL; 738 739 xy->hw_spt = spt = 0; /* XXX needed ? */ 740 /* Attach the disk: must be before getdisklabel to malloc label */ 741 disk_attach(&xy->sc_dk); 742 743 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 744 goto done; 745 746 /* inform the user of what is up */ 747 printf("%s: <%s>, pcyl %d\n", xy->sc_dev.dv_xname, 748 buf, xy->pcyl); 749 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 750 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 751 xy->sc_dev.dv_xname, mb, xy->ncyl, xy->nhead, xy->nsect, 752 XYFM_BPS); 753 754 /* 755 * 450/451 stupidity: the drive type is encoded into the format 756 * of the disk. the drive type in the IOPB must match the drive 757 * type in the format, or you will not be able to do I/O to the 758 * disk (you get header not found errors). if you have two drives 759 * of different sizes that have the same drive type in their 760 * formatting then you are out of luck. 761 * 762 * this problem was corrected in the 753/7053. 763 */ 764 765 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 766 oxy = xyc->sc_drives[lcv]; 767 if (oxy == NULL || oxy == xy) continue; 768 if (oxy->drive_type != xy->drive_type) continue; 769 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 770 xy->nhead != oxy->nhead) { 771 printf("%s: %s and %s must be the same size!\n", 772 xyc->sc_dev.dv_xname, xy->sc_dev.dv_xname, 773 oxy->sc_dev.dv_xname); 774 panic("xy drive size mismatch"); 775 } 776 } 777 778 779 /* now set the real drive parameters! */ 780 781 blk = (xy->nsect - 1) + 782 ((xy->nhead - 1) * xy->nsect) + 783 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 784 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 785 XYC_DONE(xyc, error); 786 if (error) { 787 printf("%s: write drive size failed: %s\n", 788 xy->sc_dev.dv_xname, xyc_e2str(error)); 789 goto done; 790 } 791 newstate = XY_DRIVE_ONLINE; 792 793 /* 794 * read bad144 table. this table resides on the first sector of the 795 * last track of the disk (i.e. second cyl of "acyl" area). 796 */ 797 798 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 799 /* last cyl */ 800 (xy->nhead - 1) * xy->nsect; /* last head */ 801 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 802 dmaddr, fmode); 803 XYC_DONE(xyc, error); 804 if (error) { 805 printf("%s: reading bad144 failed: %s\n", 806 xy->sc_dev.dv_xname, xyc_e2str(error)); 807 goto done; 808 } 809 810 /* check dkbad for sanity */ 811 dkb = (struct dkbad *) buf; 812 for (lcv = 0; lcv < 126; lcv++) { 813 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 814 dkb->bt_bad[lcv].bt_cyl == 0) && 815 dkb->bt_bad[lcv].bt_trksec == 0xffff) 816 continue; /* blank */ 817 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 818 break; 819 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 820 break; 821 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 822 break; 823 } 824 if (lcv != 126) { 825 printf("%s: warning: invalid bad144 sector!\n", 826 xy->sc_dev.dv_xname); 827 } else { 828 bcopy(buf, &xy->dkb, XYFM_BPS); 829 } 830 831 done: 832 if (buf != NULL) { 833 xy_dmamem_free(xyc->dmatag, xyc->auxmap, 834 &seg, rseg, XYFM_BPS, buf); 835 } 836 837 xy->state = newstate; 838 if (!xa->booting) { 839 wakeup(&xy->state); 840 splx(s); 841 } 842 } 843 844 /* 845 * end of autoconfig functions 846 */ 847 848 /* 849 * { b , c } d e v s w f u n c t i o n s 850 */ 851 852 /* 853 * xyclose: close device 854 */ 855 int 856 xyclose(dev, flag, fmt, l) 857 dev_t dev; 858 int flag, fmt; 859 struct lwp *l; 860 861 { 862 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 863 int part = DISKPART(dev); 864 865 /* clear mask bits */ 866 867 switch (fmt) { 868 case S_IFCHR: 869 xy->sc_dk.dk_copenmask &= ~(1 << part); 870 break; 871 case S_IFBLK: 872 xy->sc_dk.dk_bopenmask &= ~(1 << part); 873 break; 874 } 875 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 876 877 return 0; 878 } 879 880 /* 881 * xydump: crash dump system 882 */ 883 int 884 xydump(dev, blkno, va, size) 885 dev_t dev; 886 daddr_t blkno; 887 void *va; 888 size_t size; 889 { 890 int unit, part; 891 struct xy_softc *xy; 892 893 unit = DISKUNIT(dev); 894 if (unit >= xy_cd.cd_ndevs) 895 return ENXIO; 896 part = DISKPART(dev); 897 898 xy = xy_cd.cd_devs[unit]; 899 900 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 901 'a' + part); 902 903 return ENXIO; 904 905 /* outline: globals: "dumplo" == sector number of partition to start 906 * dump at (convert to physical sector with partition table) 907 * "dumpsize" == size of dump in clicks "physmem" == size of physical 908 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 909 * physmem) 910 * 911 * dump a copy of physical memory to the dump device starting at sector 912 * "dumplo" in the swap partition (make sure > 0). map in pages as 913 * we go. use polled I/O. 914 * 915 * XXX how to handle NON_CONTIG? */ 916 917 } 918 919 /* 920 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 921 */ 922 int 923 xyioctl(dev, command, addr, flag, l) 924 dev_t dev; 925 u_long command; 926 void *addr; 927 int flag; 928 struct lwp *l; 929 930 { 931 struct xy_softc *xy; 932 struct xd_iocmd *xio; 933 int error, s, unit; 934 #ifdef __HAVE_OLD_DISKLABEL 935 struct disklabel newlabel; 936 #endif 937 struct disklabel *lp; 938 939 unit = DISKUNIT(dev); 940 941 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 942 return (ENXIO); 943 944 /* switch on ioctl type */ 945 946 switch (command) { 947 case DIOCSBAD: /* set bad144 info */ 948 if ((flag & FWRITE) == 0) 949 return EBADF; 950 s = splbio(); 951 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 952 splx(s); 953 return 0; 954 955 case DIOCGDINFO: /* get disk label */ 956 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 957 return 0; 958 #ifdef __HAVE_OLD_DISKLABEL 959 case ODIOCGDINFO: 960 newlabel = *(xy->sc_dk.dk_label); 961 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 962 return ENOTTY; 963 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 964 return 0; 965 #endif 966 967 case DIOCGPART: /* get partition info */ 968 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 969 ((struct partinfo *) addr)->part = 970 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 971 return 0; 972 973 case DIOCSDINFO: /* set disk label */ 974 #ifdef __HAVE_OLD_DISKLABEL 975 case ODIOCSDINFO: 976 if (command == ODIOCSDINFO) { 977 memset(&newlabel, 0, sizeof newlabel); 978 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 979 lp = &newlabel; 980 } else 981 #endif 982 lp = (struct disklabel *)addr; 983 984 if ((flag & FWRITE) == 0) 985 return EBADF; 986 error = setdisklabel(xy->sc_dk.dk_label, 987 lp, /* xy->sc_dk.dk_openmask : */ 0, 988 xy->sc_dk.dk_cpulabel); 989 if (error == 0) { 990 if (xy->state == XY_DRIVE_NOLABEL) 991 xy->state = XY_DRIVE_ONLINE; 992 } 993 return error; 994 995 case DIOCWLABEL: /* change write status of disk label */ 996 if ((flag & FWRITE) == 0) 997 return EBADF; 998 if (*(int *) addr) 999 xy->flags |= XY_WLABEL; 1000 else 1001 xy->flags &= ~XY_WLABEL; 1002 return 0; 1003 1004 case DIOCWDINFO: /* write disk label */ 1005 #ifdef __HAVE_OLD_DISKLABEL 1006 case ODIOCWDINFO: 1007 if (command == ODIOCWDINFO) { 1008 memset(&newlabel, 0, sizeof newlabel); 1009 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 1010 lp = &newlabel; 1011 } else 1012 #endif 1013 lp = (struct disklabel *)addr; 1014 1015 if ((flag & FWRITE) == 0) 1016 return EBADF; 1017 error = setdisklabel(xy->sc_dk.dk_label, 1018 lp, /* xy->sc_dk.dk_openmask : */ 0, 1019 xy->sc_dk.dk_cpulabel); 1020 if (error == 0) { 1021 if (xy->state == XY_DRIVE_NOLABEL) 1022 xy->state = XY_DRIVE_ONLINE; 1023 1024 /* Simulate opening partition 0 so write succeeds. */ 1025 xy->sc_dk.dk_openmask |= (1 << 0); 1026 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 1027 xystrategy, xy->sc_dk.dk_label, 1028 xy->sc_dk.dk_cpulabel); 1029 xy->sc_dk.dk_openmask = 1030 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1031 } 1032 return error; 1033 1034 case DIOSXDCMD: 1035 xio = (struct xd_iocmd *) addr; 1036 if ((error = kauth_authorize_generic(l->l_cred, 1037 KAUTH_GENERIC_ISSUSER, NULL)) != 0) 1038 return (error); 1039 return (xyc_ioctlcmd(xy, dev, xio)); 1040 1041 default: 1042 return ENOTTY; 1043 } 1044 } 1045 1046 /* 1047 * xyopen: open drive 1048 */ 1049 1050 int 1051 xyopen(dev, flag, fmt, l) 1052 dev_t dev; 1053 int flag, fmt; 1054 struct lwp *l; 1055 { 1056 int unit, part; 1057 struct xy_softc *xy; 1058 struct xyc_attach_args xa; 1059 1060 /* first, could it be a valid target? */ 1061 1062 unit = DISKUNIT(dev); 1063 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 1064 return (ENXIO); 1065 part = DISKPART(dev); 1066 1067 /* do we need to attach the drive? */ 1068 1069 if (xy->state == XY_DRIVE_UNKNOWN) { 1070 xa.driveno = xy->xy_drive; 1071 xa.fullmode = XY_SUB_WAIT; 1072 xa.booting = 0; 1073 xyattach((struct device *) xy->parent, 1074 (struct device *) xy, &xa); 1075 if (xy->state == XY_DRIVE_UNKNOWN) { 1076 return (EIO); 1077 } 1078 } 1079 /* check for partition */ 1080 1081 if (part != RAW_PART && 1082 (part >= xy->sc_dk.dk_label->d_npartitions || 1083 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1084 return (ENXIO); 1085 } 1086 /* set open masks */ 1087 1088 switch (fmt) { 1089 case S_IFCHR: 1090 xy->sc_dk.dk_copenmask |= (1 << part); 1091 break; 1092 case S_IFBLK: 1093 xy->sc_dk.dk_bopenmask |= (1 << part); 1094 break; 1095 } 1096 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1097 1098 return 0; 1099 } 1100 1101 int 1102 xyread(dev, uio, flags) 1103 dev_t dev; 1104 struct uio *uio; 1105 int flags; 1106 { 1107 1108 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1109 } 1110 1111 int 1112 xywrite(dev, uio, flags) 1113 dev_t dev; 1114 struct uio *uio; 1115 int flags; 1116 { 1117 1118 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1119 } 1120 1121 1122 /* 1123 * xysize: return size of a partition for a dump 1124 */ 1125 1126 int 1127 xysize(dev) 1128 dev_t dev; 1129 1130 { 1131 struct xy_softc *xysc; 1132 int unit, part, size, omask; 1133 1134 /* valid unit? */ 1135 unit = DISKUNIT(dev); 1136 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1137 return (-1); 1138 1139 part = DISKPART(dev); 1140 omask = xysc->sc_dk.dk_openmask & (1 << part); 1141 1142 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1143 return (-1); 1144 1145 /* do it */ 1146 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1147 size = -1; /* only give valid size for swap partitions */ 1148 else 1149 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1150 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1151 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1152 return (-1); 1153 return (size); 1154 } 1155 1156 /* 1157 * xystrategy: buffering system interface to xy. 1158 */ 1159 1160 void 1161 xystrategy(bp) 1162 struct buf *bp; 1163 1164 { 1165 struct xy_softc *xy; 1166 int s, unit; 1167 struct xyc_attach_args xa; 1168 struct disklabel *lp; 1169 daddr_t blkno; 1170 1171 unit = DISKUNIT(bp->b_dev); 1172 1173 /* check for live device */ 1174 1175 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1176 bp->b_blkno < 0 || 1177 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1178 bp->b_error = EINVAL; 1179 goto bad; 1180 } 1181 /* do we need to attach the drive? */ 1182 1183 if (xy->state == XY_DRIVE_UNKNOWN) { 1184 xa.driveno = xy->xy_drive; 1185 xa.fullmode = XY_SUB_WAIT; 1186 xa.booting = 0; 1187 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1188 if (xy->state == XY_DRIVE_UNKNOWN) { 1189 bp->b_error = EIO; 1190 goto bad; 1191 } 1192 } 1193 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1194 /* no I/O to unlabeled disks, unless raw partition */ 1195 bp->b_error = EIO; 1196 goto bad; 1197 } 1198 /* short circuit zero length request */ 1199 1200 if (bp->b_bcount == 0) 1201 goto done; 1202 1203 /* check bounds with label (disksubr.c). Determine the size of the 1204 * transfer, and make sure it is within the boundaries of the 1205 * partition. Adjust transfer if needed, and signal errors or early 1206 * completion. */ 1207 1208 lp = xy->sc_dk.dk_label; 1209 1210 if (bounds_check_with_label(&xy->sc_dk, bp, 1211 (xy->flags & XY_WLABEL) != 0) <= 0) 1212 goto done; 1213 1214 /* 1215 * Now convert the block number to absolute and put it in 1216 * terms of the device's logical block size. 1217 */ 1218 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1219 if (DISKPART(bp->b_dev) != RAW_PART) 1220 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1221 1222 bp->b_rawblkno = blkno; 1223 1224 /* 1225 * now we know we have a valid buf structure that we need to do I/O 1226 * on. 1227 */ 1228 s = splbio(); /* protect the queues */ 1229 1230 BUFQ_PUT(xy->xyq, bp); 1231 1232 /* start 'em up */ 1233 1234 xyc_start(xy->parent, NULL); 1235 1236 /* done! */ 1237 1238 splx(s); 1239 return; 1240 1241 bad: /* tells upper layers we have an error */ 1242 bp->b_flags |= B_ERROR; 1243 done: /* tells upper layers we are done with this 1244 * buf */ 1245 bp->b_resid = bp->b_bcount; 1246 biodone(bp); 1247 } 1248 /* 1249 * end of {b,c}devsw functions 1250 */ 1251 1252 /* 1253 * i n t e r r u p t f u n c t i o n 1254 * 1255 * xycintr: hardware interrupt. 1256 */ 1257 int 1258 xycintr(v) 1259 void *v; 1260 1261 { 1262 struct xyc_softc *xycsc = v; 1263 1264 /* kick the event counter */ 1265 1266 xycsc->sc_intrcnt.ev_count++; 1267 1268 /* remove as many done IOPBs as possible */ 1269 1270 xyc_remove_iorq(xycsc); 1271 1272 /* start any iorq's already waiting */ 1273 1274 xyc_start(xycsc, NULL); 1275 1276 return (1); 1277 } 1278 /* 1279 * end of interrupt function 1280 */ 1281 1282 /* 1283 * i n t e r n a l f u n c t i o n s 1284 */ 1285 1286 /* 1287 * xyc_rqinit: fill out the fields of an I/O request 1288 */ 1289 1290 inline void 1291 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1292 struct xy_iorq *rq; 1293 struct xyc_softc *xyc; 1294 struct xy_softc *xy; 1295 int md; 1296 u_long blk; 1297 int cnt; 1298 void *db; 1299 struct buf *bp; 1300 { 1301 rq->xyc = xyc; 1302 rq->xy = xy; 1303 rq->ttl = XYC_MAXTTL + 10; 1304 rq->mode = md; 1305 rq->tries = rq->errnum = rq->lasterror = 0; 1306 rq->blockno = blk; 1307 rq->sectcnt = cnt; 1308 rq->dbuf = db; 1309 rq->buf = bp; 1310 } 1311 1312 /* 1313 * xyc_rqtopb: load up an IOPB based on an iorq 1314 */ 1315 1316 void 1317 xyc_rqtopb(iorq, iopb, cmd, subfun) 1318 struct xy_iorq *iorq; 1319 struct xy_iopb *iopb; 1320 int cmd, subfun; 1321 1322 { 1323 u_long block, dp; 1324 1325 /* normal IOPB case, standard stuff */ 1326 1327 /* chain bit handled later */ 1328 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1329 iopb->com = cmd; 1330 iopb->errnum = 0; 1331 iopb->errs = 0; 1332 iopb->done = 0; 1333 if (iorq->xy) { 1334 iopb->unit = iorq->xy->xy_drive; 1335 iopb->dt = iorq->xy->drive_type; 1336 } else { 1337 iopb->unit = 0; 1338 iopb->dt = 0; 1339 } 1340 block = iorq->blockno; 1341 if (iorq->xy == NULL || block == 0) { 1342 iopb->sect = iopb->head = iopb->cyl = 0; 1343 } else { 1344 iopb->sect = block % iorq->xy->nsect; 1345 block = block / iorq->xy->nsect; 1346 iopb->head = block % iorq->xy->nhead; 1347 block = block / iorq->xy->nhead; 1348 iopb->cyl = block; 1349 } 1350 iopb->scnt = iorq->sectcnt; 1351 dp = (u_long) iorq->dbuf; 1352 if (iorq->dbuf == NULL) { 1353 iopb->dataa = 0; 1354 iopb->datar = 0; 1355 } else { 1356 iopb->dataa = (dp & 0xffff); 1357 iopb->datar = ((dp & 0xff0000) >> 16); 1358 } 1359 iopb->subfn = subfun; 1360 } 1361 1362 1363 /* 1364 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1365 */ 1366 1367 int 1368 xyc_unbusy(xyc, del) 1369 1370 struct xyc *xyc; 1371 int del; 1372 1373 { 1374 while (del-- > 0) { 1375 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1376 break; 1377 DELAY(1); 1378 } 1379 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1380 } 1381 1382 /* 1383 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1384 * note that NORM requests are handled separately. 1385 */ 1386 int 1387 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1388 struct xyc_softc *xycsc; 1389 int cmd, subfn, unit, block, scnt; 1390 char *dptr; 1391 int fullmode; 1392 1393 { 1394 int submode = XY_STATE(fullmode); 1395 struct xy_iorq *iorq = xycsc->ciorq; 1396 struct xy_iopb *iopb = xycsc->ciopb; 1397 1398 /* 1399 * is someone else using the control iopq wait for it if we can 1400 */ 1401 start: 1402 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1403 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1404 return(XY_ERR_FAIL); 1405 goto start; 1406 } 1407 1408 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1409 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1410 iorq->mode = XY_SUB_FREE; 1411 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1412 } 1413 1414 /* init iorq/iopb */ 1415 1416 xyc_rqinit(iorq, xycsc, 1417 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1418 fullmode, block, scnt, dptr, NULL); 1419 1420 /* load IOPB from iorq */ 1421 1422 xyc_rqtopb(iorq, iopb, cmd, subfn); 1423 1424 /* submit it for processing */ 1425 1426 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1427 1428 return(XY_ERR_AOK); 1429 } 1430 1431 /* 1432 * xyc_startbuf 1433 * start a buffer for running 1434 */ 1435 1436 int 1437 xyc_startbuf(xycsc, xysc, bp) 1438 struct xyc_softc *xycsc; 1439 struct xy_softc *xysc; 1440 struct buf *bp; 1441 1442 { 1443 int partno, error; 1444 struct xy_iorq *iorq; 1445 struct xy_iopb *iopb; 1446 u_long block; 1447 1448 iorq = xysc->xyrq; 1449 iopb = iorq->iopb; 1450 1451 /* get buf */ 1452 1453 if (bp == NULL) 1454 panic("xyc_startbuf null buf"); 1455 1456 partno = DISKPART(bp->b_dev); 1457 #ifdef XYC_DEBUG 1458 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1459 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1460 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1461 bp->b_bcount, bp->b_data); 1462 #endif 1463 1464 /* 1465 * load request. 1466 * 1467 * note that iorq points to the buffer as mapped into DVMA space, 1468 * where as the bp->b_data points to its non-DVMA mapping. 1469 */ 1470 1471 block = bp->b_rawblkno; 1472 1473 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1474 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1475 if (error != 0) { 1476 printf("%s: warning: cannot load DMA map\n", 1477 xycsc->sc_dev.dv_xname); 1478 return (XY_ERR_FAIL); /* XXX: need some sort of 1479 * call-back scheme here? */ 1480 } 1481 1482 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1483 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1484 ? BUS_DMASYNC_PREREAD 1485 : BUS_DMASYNC_PREWRITE); 1486 1487 /* init iorq and load iopb from it */ 1488 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1489 bp->b_bcount / XYFM_BPS, 1490 (void *)(u_long)iorq->dmamap->dm_segs[0].ds_addr, 1491 bp); 1492 1493 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1494 1495 /* Instrumentation. */ 1496 disk_busy(&xysc->sc_dk); 1497 1498 return (XY_ERR_AOK); 1499 } 1500 1501 1502 /* 1503 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1504 * if ok. if it fail returns an error code. type is XY_SUB_*. 1505 * 1506 * note: caller frees iorq in all cases except NORM 1507 * 1508 * return value: 1509 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1510 * WAIT: XY_AOK (success), <error-code> (failed) 1511 * POLL: <same as WAIT> 1512 * NOQ : <same as NORM> 1513 * 1514 * there are three sources for i/o requests: 1515 * [1] xystrategy: normal block I/O, using "struct buf" system. 1516 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1517 * [3] open/ioctl: these are I/O requests done in the context of a process, 1518 * and the process should block until they are done. 1519 * 1520 * software state is stored in the iorq structure. each iorq has an 1521 * iopb structure. the hardware understands the iopb structure. 1522 * every command must go through an iopb. a 450 handles one iopb at a 1523 * time, where as a 451 can take them in chains. [the 450 claims it 1524 * can handle chains, but is appears to be buggy...] iopb are allocated 1525 * in DVMA space at boot up time. each disk gets one iopb, and the 1526 * controller gets one (for POLL and WAIT commands). what happens if 1527 * the iopb is busy? for i/o type [1], the buffers are queued at the 1528 * "buff" layer and * picked up later by the interrupt routine. for case 1529 * [2] we can only be blocked if there is a WAIT type I/O request being 1530 * run. since this can only happen when we are crashing, we wait a sec 1531 * and then steal the IOPB. for case [3] the process can sleep 1532 * on the iorq free list until some iopbs are available. 1533 */ 1534 1535 1536 int 1537 xyc_submit_iorq(xycsc, iorq, type) 1538 struct xyc_softc *xycsc; 1539 struct xy_iorq *iorq; 1540 int type; 1541 1542 { 1543 struct xy_iopb *dmaiopb; 1544 1545 #ifdef XYC_DEBUG 1546 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1547 xycsc->sc_dev.dv_xname, iorq, type); 1548 #endif 1549 1550 /* first check and see if controller is busy */ 1551 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1552 #ifdef XYC_DEBUG 1553 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1554 #endif 1555 if (type == XY_SUB_NOQ) 1556 return (XY_ERR_FAIL); /* failed */ 1557 switch (type) { 1558 case XY_SUB_NORM: 1559 return XY_ERR_AOK; /* success */ 1560 case XY_SUB_WAIT: 1561 while (iorq->iopb->done == 0) { 1562 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1563 } 1564 return (iorq->errnum); 1565 case XY_SUB_POLL: /* steal controller */ 1566 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1567 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1568 panic("xyc_submit_iorq: stuck xyc"); 1569 printf("%s: stole controller\n", 1570 xycsc->sc_dev.dv_xname); 1571 break; 1572 default: 1573 panic("xyc_submit_iorq adding"); 1574 } 1575 } 1576 1577 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1578 if (dmaiopb == NULL) { /* nothing doing? */ 1579 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1580 return(XY_ERR_AOK); 1581 panic("xyc_submit_iorq: xyc_chain failed!"); 1582 } 1583 1584 XYC_GO(xycsc->xyc, dmaiopb); 1585 1586 /* command now running, wrap it up */ 1587 switch (type) { 1588 case XY_SUB_NORM: 1589 case XY_SUB_NOQ: 1590 return (XY_ERR_AOK); /* success */ 1591 case XY_SUB_WAIT: 1592 while (iorq->iopb->done == 0) { 1593 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1594 } 1595 return (iorq->errnum); 1596 case XY_SUB_POLL: 1597 return (xyc_piodriver(xycsc, iorq)); 1598 default: 1599 panic("xyc_submit_iorq wrap up"); 1600 } 1601 panic("xyc_submit_iorq"); 1602 return 0; /* not reached */ 1603 } 1604 1605 1606 /* 1607 * xyc_chain: build a chain. return dvma address of first element in 1608 * the chain. iorq != NULL: means we only want that item on the chain. 1609 */ 1610 1611 struct xy_iopb * 1612 xyc_chain(xycsc, iorq) 1613 struct xyc_softc *xycsc; 1614 struct xy_iorq *iorq; 1615 1616 { 1617 int togo, chain, hand; 1618 1619 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1620 1621 /* 1622 * promote control IOPB to the top 1623 */ 1624 if (iorq == NULL) { 1625 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1626 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1627 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1628 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1629 } 1630 1631 /* 1632 * special case: if iorq != NULL then we have a POLL or WAIT request. 1633 * we let these take priority and do them first. 1634 */ 1635 if (iorq) { 1636 xycsc->xy_chain[0] = iorq; 1637 iorq->iopb->chen = 0; 1638 return(iorq->dmaiopb); 1639 } 1640 1641 /* 1642 * NORM case: do round robin and maybe chain (if allowed and possible) 1643 */ 1644 chain = 0; 1645 hand = xycsc->xy_hand; 1646 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1647 1648 for (togo = XYC_MAXIOPB; togo > 0; 1649 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1650 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1651 1652 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1653 xycsc->iopbase[hand].done) 1654 continue; /* not ready-for-i/o */ 1655 1656 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1657 iopb = xycsc->xy_chain[chain]->iopb; 1658 iopb->chen = 0; 1659 if (chain != 0) { 1660 /* adding a link to a chain */ 1661 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1662 prev_iopb->chen = 1; 1663 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1664 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1665 } else { 1666 /* head of chain */ 1667 iorq = xycsc->xy_chain[chain]; 1668 } 1669 chain++; 1670 1671 /* quit if chaining dis-allowed */ 1672 if (xycsc->no_ols) 1673 break; 1674 } 1675 1676 return(iorq ? iorq->dmaiopb : NULL); 1677 } 1678 1679 /* 1680 * xyc_piodriver 1681 * 1682 * programmed i/o driver. this function takes over the computer 1683 * and drains off the polled i/o request. it returns the status of the iorq 1684 * the caller is interesting in. 1685 */ 1686 int 1687 xyc_piodriver(xycsc, iorq) 1688 struct xyc_softc *xycsc; 1689 struct xy_iorq *iorq; 1690 1691 { 1692 int nreset = 0; 1693 int retval = 0; 1694 u_long res; 1695 #ifdef XYC_DEBUG 1696 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1697 #endif 1698 1699 while (iorq->iopb->done == 0) { 1700 1701 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1702 1703 /* we expect some progress soon */ 1704 if (res == XY_ERR_FAIL && nreset >= 2) { 1705 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1706 #ifdef XYC_DEBUG 1707 printf("xyc_piodriver: timeout\n"); 1708 #endif 1709 return (XY_ERR_FAIL); 1710 } 1711 if (res == XY_ERR_FAIL) { 1712 if (xyc_reset(xycsc, 0, 1713 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1714 XY_ERR_FAIL, 1715 0) == XY_ERR_FAIL) 1716 return (XY_ERR_FAIL); /* flushes all but POLL 1717 * requests, resets */ 1718 continue; 1719 } 1720 1721 xyc_remove_iorq(xycsc); /* may resubmit request */ 1722 1723 if (iorq->iopb->done == 0) 1724 xyc_start(xycsc, iorq); 1725 } 1726 1727 /* get return value */ 1728 1729 retval = iorq->errnum; 1730 1731 #ifdef XYC_DEBUG 1732 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1733 iorq->errnum, xyc_e2str(iorq->errnum)); 1734 #endif 1735 1736 /* start up any bufs that have queued */ 1737 1738 xyc_start(xycsc, NULL); 1739 1740 return (retval); 1741 } 1742 1743 /* 1744 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1745 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1746 */ 1747 void 1748 xyc_xyreset(xycsc, xysc) 1749 struct xyc_softc *xycsc; 1750 struct xy_softc *xysc; 1751 1752 { 1753 struct xy_iopb tmpiopb; 1754 struct xy_iopb *iopb; 1755 int del; 1756 1757 iopb = xycsc->ciopb; 1758 1759 /* Save contents */ 1760 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1761 1762 iopb->chen = iopb->done = iopb->errs = 0; 1763 iopb->ien = 0; 1764 iopb->com = XYCMD_RST; 1765 iopb->unit = xysc->xy_drive; 1766 1767 XYC_GO(xycsc->xyc, xycsc->ciorq->dmaiopb); 1768 1769 del = XYC_RESETUSEC; 1770 while (del > 0) { 1771 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1772 break; 1773 DELAY(1); 1774 del--; 1775 } 1776 1777 if (del <= 0 || iopb->errs) { 1778 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1779 xyc_e2str(iopb->errnum)); 1780 del = xycsc->xyc->xyc_rsetup; 1781 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1782 panic("xyc_reset"); 1783 } else { 1784 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1785 } 1786 1787 /* Restore contents */ 1788 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1789 } 1790 1791 1792 /* 1793 * xyc_reset: reset everything: requests are marked as errors except 1794 * a polled request (which is resubmitted) 1795 */ 1796 int 1797 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1798 struct xyc_softc *xycsc; 1799 int quiet, error; 1800 struct xy_iorq *blastmode; 1801 struct xy_softc *xysc; 1802 1803 { 1804 int del = 0, lcv, retval = XY_ERR_AOK; 1805 1806 /* soft reset hardware */ 1807 1808 if (!quiet) 1809 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1810 del = xycsc->xyc->xyc_rsetup; 1811 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1812 if (del == XY_ERR_FAIL) { 1813 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1814 retval = XY_ERR_FAIL; 1815 } 1816 if (xysc) 1817 xyc_xyreset(xycsc, xysc); 1818 1819 /* fix queues based on "blast-mode" */ 1820 1821 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1822 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1823 1824 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1825 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1826 XY_STATE(iorq->mode) != XY_SUB_NORM) 1827 /* is it active? */ 1828 continue; 1829 1830 if (blastmode == XY_RSET_ALL || 1831 blastmode != iorq) { 1832 /* failed */ 1833 iorq->errnum = error; 1834 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1835 switch (XY_STATE(iorq->mode)) { 1836 case XY_SUB_NORM: 1837 iorq->buf->b_error = EIO; 1838 iorq->buf->b_flags |= B_ERROR; 1839 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1840 1841 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1842 iorq->dmamap->dm_mapsize, 1843 (iorq->buf->b_flags & B_READ) 1844 ? BUS_DMASYNC_POSTREAD 1845 : BUS_DMASYNC_POSTWRITE); 1846 1847 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1848 1849 (void)BUFQ_GET(iorq->xy->xyq); 1850 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1851 (xycsc->reqs[lcv].buf->b_bcount - 1852 xycsc->reqs[lcv].buf->b_resid), 1853 (xycsc->reqs[lcv].buf->b_flags & B_READ)); 1854 biodone(iorq->buf); 1855 iorq->mode = XY_SUB_FREE; 1856 break; 1857 case XY_SUB_WAIT: 1858 wakeup(iorq); 1859 case XY_SUB_POLL: 1860 iorq->mode = 1861 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1862 break; 1863 } 1864 1865 } else { 1866 1867 /* resubmit, no need to do anything here */ 1868 } 1869 } 1870 1871 /* 1872 * now, if stuff is waiting, start it. 1873 * since we just reset it should go 1874 */ 1875 xyc_start(xycsc, NULL); 1876 1877 return (retval); 1878 } 1879 1880 /* 1881 * xyc_start: start waiting buffers 1882 */ 1883 1884 void 1885 xyc_start(xycsc, iorq) 1886 struct xyc_softc *xycsc; 1887 struct xy_iorq *iorq; 1888 1889 { 1890 int lcv; 1891 struct xy_softc *xy; 1892 1893 if (iorq == NULL) { 1894 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1895 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1896 if (BUFQ_PEEK(xy->xyq) == NULL) continue; 1897 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1898 xyc_startbuf(xycsc, xy, BUFQ_PEEK(xy->xyq)); 1899 } 1900 } 1901 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1902 } 1903 1904 /* 1905 * xyc_remove_iorq: remove "done" IOPB's. 1906 */ 1907 1908 int 1909 xyc_remove_iorq(xycsc) 1910 struct xyc_softc *xycsc; 1911 1912 { 1913 int errnum, rq, comm, errs; 1914 struct xyc *xyc = xycsc->xyc; 1915 u_long addr; 1916 struct xy_iopb *iopb; 1917 struct xy_iorq *iorq; 1918 struct buf *bp; 1919 1920 if (xyc->xyc_csr & XYC_DERR) { 1921 /* 1922 * DOUBLE ERROR: should never happen under normal use. This 1923 * error is so bad, you can't even tell which IOPB is bad, so 1924 * we dump them all. 1925 */ 1926 errnum = XY_ERR_DERR; 1927 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1928 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errnum, 0) != XY_ERR_AOK) { 1929 printf("%s: soft reset failed!\n", 1930 xycsc->sc_dev.dv_xname); 1931 panic("xyc_remove_iorq: controller DEAD"); 1932 } 1933 return (XY_ERR_AOK); 1934 } 1935 1936 /* 1937 * get iopb that is done, loop down the chain 1938 */ 1939 1940 if (xyc->xyc_csr & XYC_ERR) { 1941 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1942 } 1943 if (xyc->xyc_csr & XYC_IPND) { 1944 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1945 } 1946 1947 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1948 iorq = xycsc->xy_chain[rq]; 1949 if (iorq == NULL) break; /* done ! */ 1950 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1951 continue; /* free, or done */ 1952 iopb = iorq->iopb; 1953 if (iopb->done == 0) 1954 continue; /* not done yet */ 1955 1956 comm = iopb->com; 1957 errs = iopb->errs; 1958 1959 if (errs) 1960 iorq->errnum = iopb->errnum; 1961 else 1962 iorq->errnum = 0; 1963 1964 /* handle non-fatal errors */ 1965 1966 if (errs && 1967 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1968 continue; /* AOK: we resubmitted it */ 1969 1970 1971 /* this iorq is now done (hasn't been restarted or anything) */ 1972 1973 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1974 xyc_perror(iorq, iopb, 0); 1975 1976 /* now, if read/write check to make sure we got all the data 1977 * we needed. (this may not be the case if we got an error in 1978 * the middle of a multisector request). */ 1979 1980 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1981 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1982 /* we just successfully processed a bad144 sector 1983 * note: if we are in bad 144 mode, the pointers have 1984 * been advanced already (see above) and are pointing 1985 * at the bad144 sector. to exit bad144 mode, we 1986 * must advance the pointers 1 sector and issue a new 1987 * request if there are still sectors left to process 1988 * 1989 */ 1990 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1991 1992 /* exit b144 mode */ 1993 iorq->mode = iorq->mode & (~XY_MODE_B144); 1994 1995 if (iorq->sectcnt) { /* more to go! */ 1996 iorq->lasterror = iorq->errnum = iopb->errnum = 0; 1997 iopb->errs = iopb->done = 0; 1998 iorq->tries = 0; 1999 iopb->scnt = iorq->sectcnt; 2000 iopb->cyl = iorq->blockno / 2001 iorq->xy->sectpercyl; 2002 iopb->head = 2003 (iorq->blockno / iorq->xy->nhead) % 2004 iorq->xy->nhead; 2005 iopb->sect = iorq->blockno % XYFM_BPS; 2006 addr = (u_long) iorq->dbuf; 2007 iopb->dataa = (addr & 0xffff); 2008 iopb->datar = ((addr & 0xff0000) >> 16); 2009 /* will resubit at end */ 2010 continue; 2011 } 2012 } 2013 /* final cleanup, totally done with this request */ 2014 2015 switch (XY_STATE(iorq->mode)) { 2016 case XY_SUB_NORM: 2017 bp = iorq->buf; 2018 if (errs) { 2019 bp->b_error = EIO; 2020 bp->b_flags |= B_ERROR; 2021 bp->b_resid = iorq->sectcnt * XYFM_BPS; 2022 } else { 2023 bp->b_resid = 0; /* done */ 2024 } 2025 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 2026 iorq->dmamap->dm_mapsize, 2027 (iorq->buf->b_flags & B_READ) 2028 ? BUS_DMASYNC_POSTREAD 2029 : BUS_DMASYNC_POSTWRITE); 2030 2031 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 2032 2033 (void)BUFQ_GET(iorq->xy->xyq); 2034 disk_unbusy(&iorq->xy->sc_dk, 2035 (bp->b_bcount - bp->b_resid), 2036 (bp->b_flags & B_READ)); 2037 iorq->mode = XY_SUB_FREE; 2038 biodone(bp); 2039 break; 2040 case XY_SUB_WAIT: 2041 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2042 wakeup(iorq); 2043 break; 2044 case XY_SUB_POLL: 2045 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2046 break; 2047 } 2048 } 2049 2050 return (XY_ERR_AOK); 2051 } 2052 2053 /* 2054 * xyc_perror: print error. 2055 * - if still_trying is true: we got an error, retried and got a 2056 * different error. in that case lasterror is the old error, 2057 * and errnum is the new one. 2058 * - if still_trying is not true, then if we ever had an error it 2059 * is in lasterror. also, if iorq->errnum == 0, then we recovered 2060 * from that error (otherwise iorq->errnum == iorq->lasterror). 2061 */ 2062 void 2063 xyc_perror(iorq, iopb, still_trying) 2064 struct xy_iorq *iorq; 2065 struct xy_iopb *iopb; 2066 int still_trying; 2067 2068 { 2069 2070 int error = iorq->lasterror; 2071 2072 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 2073 : iorq->xyc->sc_dev.dv_xname); 2074 if (iorq->buf) 2075 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2076 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2077 printf("%s %d/%d/%d: ", 2078 (iopb->com == XYCMD_RD) ? "read" : "write", 2079 iopb->cyl, iopb->head, iopb->sect); 2080 printf("%s", xyc_e2str(error)); 2081 2082 if (still_trying) 2083 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errnum)); 2084 else 2085 if (iorq->errnum == 0) 2086 printf(" [recovered in %d tries]", iorq->tries); 2087 2088 printf("\n"); 2089 } 2090 2091 /* 2092 * xyc_error: non-fatal error encountered... recover. 2093 * return AOK if resubmitted, return FAIL if this iopb is done 2094 */ 2095 int 2096 xyc_error(xycsc, iorq, iopb, comm) 2097 struct xyc_softc *xycsc; 2098 struct xy_iorq *iorq; 2099 struct xy_iopb *iopb; 2100 int comm; 2101 2102 { 2103 int errnum = iorq->errnum; 2104 int erract = xyc_entoact(errnum); 2105 int oldmode, advance; 2106 #ifdef __sparc__ 2107 int i; 2108 #endif 2109 2110 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2111 oldmode = iorq->mode; 2112 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2113 /* make xyc_start ignore us */ 2114 xyc_reset(xycsc, 1, XY_RSET_NONE, errnum, iorq->xy); 2115 iorq->mode = oldmode; 2116 } 2117 /* check for read/write to a sector in bad144 table if bad: redirect 2118 * request to bad144 area */ 2119 2120 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2121 (iorq->mode & XY_MODE_B144) == 0) { 2122 advance = iorq->sectcnt - iopb->scnt; 2123 XYC_ADVANCE(iorq, advance); 2124 #ifdef __sparc__ 2125 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2126 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2127 iorq->blockno % iorq->xy->nsect)) != -1) { 2128 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2129 * redirect */ 2130 iopb->errnum = iopb->done = iopb->errs = 0; 2131 iopb->scnt = 1; 2132 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2133 /* second to last acyl */ 2134 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2135 * standard */ 2136 iopb->head = i / iorq->xy->nhead; 2137 iopb->sect = i % iorq->xy->nhead; 2138 /* will resubmit when we come out of remove_iorq */ 2139 return (XY_ERR_AOK); /* recovered! */ 2140 } 2141 #endif 2142 } 2143 2144 /* 2145 * it isn't a bad144 sector, must be real error! see if we can retry 2146 * it? 2147 */ 2148 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2149 xyc_perror(iorq, iopb, 1); /* inform of error state 2150 * change */ 2151 iorq->lasterror = errnum; 2152 2153 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2154 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2155 iorq->tries++; 2156 iorq->errnum = iopb->errnum = iopb->done = iopb->errs = 0; 2157 /* will resubmit at end of remove_iorq */ 2158 return (XY_ERR_AOK); /* recovered! */ 2159 } 2160 2161 /* failed to recover from this error */ 2162 return (XY_ERR_FAIL); 2163 } 2164 2165 /* 2166 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2167 */ 2168 void 2169 xyc_tick(arg) 2170 void *arg; 2171 2172 { 2173 struct xyc_softc *xycsc = arg; 2174 int lcv, s, reset = 0; 2175 2176 /* reduce ttl for each request if one goes to zero, reset xyc */ 2177 s = splbio(); 2178 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2179 if (xycsc->reqs[lcv].mode == 0 || 2180 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2181 continue; 2182 xycsc->reqs[lcv].ttl--; 2183 if (xycsc->reqs[lcv].ttl == 0) 2184 reset = 1; 2185 } 2186 if (reset) { 2187 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2188 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2189 } 2190 splx(s); 2191 2192 /* until next time */ 2193 2194 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2195 } 2196 2197 /* 2198 * xyc_ioctlcmd: this function provides a user level interface to the 2199 * controller via ioctl. this allows "format" programs to be written 2200 * in user code, and is also useful for some debugging. we return 2201 * an error code. called at user priority. 2202 * 2203 * XXX missing a few commands (see the 7053 driver for ideas) 2204 */ 2205 int 2206 xyc_ioctlcmd(xy, dev, xio) 2207 struct xy_softc *xy; 2208 dev_t dev; 2209 struct xd_iocmd *xio; 2210 2211 { 2212 int s, rqno, dummy = 0; 2213 void *dvmabuf = NULL, buf = NULL; 2214 struct xyc_softc *xycsc; 2215 int rseg, error; 2216 bus_dma_segment_t seg; 2217 2218 /* check sanity of requested command */ 2219 2220 switch (xio->cmd) { 2221 2222 case XYCMD_NOP: /* no op: everything should be zero */ 2223 if (xio->subfn || xio->dptr || xio->dlen || 2224 xio->block || xio->sectcnt) 2225 return (EINVAL); 2226 break; 2227 2228 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2229 case XYCMD_WR: 2230 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2231 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2232 return (EINVAL); 2233 break; 2234 2235 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2236 return (EINVAL); 2237 2238 break; 2239 2240 default: 2241 return (EINVAL);/* ??? */ 2242 } 2243 2244 xycsc = xy->parent; 2245 2246 /* create DVMA buffer for request if needed */ 2247 if (xio->dlen) { 2248 bus_addr_t busbuf; 2249 2250 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2251 &seg, &rseg, 2252 xio->dlen, &buf, 2253 &busbuf)) != 0) { 2254 return (error); 2255 } 2256 dvmabuf = (void *)(u_long)BUS_ADDR_PADDR(busbuf); 2257 2258 if (xio->cmd == XYCMD_WR) { 2259 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2260 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2261 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2262 return (error); 2263 } 2264 } 2265 } 2266 /* do it! */ 2267 2268 error = 0; 2269 s = splbio(); 2270 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2271 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2272 if (rqno == XY_ERR_FAIL) { 2273 error = EIO; 2274 goto done; 2275 } 2276 xio->errnum = xycsc->ciorq->errnum; 2277 xio->tries = xycsc->ciorq->tries; 2278 XYC_DONE(xycsc, dummy); 2279 2280 if (xio->cmd == XYCMD_RD) 2281 error = copyout(buf, xio->dptr, xio->dlen); 2282 2283 done: 2284 splx(s); 2285 if (dvmabuf) { 2286 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2287 xio->dlen, buf); 2288 } 2289 return (error); 2290 } 2291 2292 /* 2293 * xyc_e2str: convert error code number into an error string 2294 */ 2295 const char * 2296 xyc_e2str(no) 2297 int no; 2298 { 2299 switch (no) { 2300 case XY_ERR_FAIL: 2301 return ("Software fatal error"); 2302 case XY_ERR_DERR: 2303 return ("DOUBLE ERROR"); 2304 case XY_ERR_AOK: 2305 return ("Successful completion"); 2306 case XY_ERR_IPEN: 2307 return("Interrupt pending"); 2308 case XY_ERR_BCFL: 2309 return("Busy conflict"); 2310 case XY_ERR_TIMO: 2311 return("Operation timeout"); 2312 case XY_ERR_NHDR: 2313 return("Header not found"); 2314 case XY_ERR_HARD: 2315 return("Hard ECC error"); 2316 case XY_ERR_ICYL: 2317 return("Illegal cylinder address"); 2318 case XY_ERR_ISEC: 2319 return("Illegal sector address"); 2320 case XY_ERR_SMAL: 2321 return("Last sector too small"); 2322 case XY_ERR_SACK: 2323 return("Slave ACK error (non-existent memory)"); 2324 case XY_ERR_CHER: 2325 return("Cylinder and head/header error"); 2326 case XY_ERR_SRTR: 2327 return("Auto-seek retry successful"); 2328 case XY_ERR_WPRO: 2329 return("Write-protect error"); 2330 case XY_ERR_UIMP: 2331 return("Unimplemented command"); 2332 case XY_ERR_DNRY: 2333 return("Drive not ready"); 2334 case XY_ERR_SZER: 2335 return("Sector count zero"); 2336 case XY_ERR_DFLT: 2337 return("Drive faulted"); 2338 case XY_ERR_ISSZ: 2339 return("Illegal sector size"); 2340 case XY_ERR_SLTA: 2341 return("Self test A"); 2342 case XY_ERR_SLTB: 2343 return("Self test B"); 2344 case XY_ERR_SLTC: 2345 return("Self test C"); 2346 case XY_ERR_SOFT: 2347 return("Soft ECC error"); 2348 case XY_ERR_SFOK: 2349 return("Soft ECC error recovered"); 2350 case XY_ERR_IHED: 2351 return("Illegal head"); 2352 case XY_ERR_DSEQ: 2353 return("Disk sequencer error"); 2354 case XY_ERR_SEEK: 2355 return("Seek error"); 2356 default: 2357 return ("Unknown error"); 2358 } 2359 } 2360 2361 int 2362 xyc_entoact(errnum) 2363 2364 int errnum; 2365 2366 { 2367 switch (errnum) { 2368 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2369 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2370 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2371 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2372 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2373 2374 return(XY_ERA_PROG); /* program error ! */ 2375 2376 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2377 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2378 case XY_ERR_SOFT: 2379 2380 return(XY_ERA_HARD); /* hard error, retry */ 2381 2382 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2383 2384 return(XY_ERA_RSET); /* hard error reset */ 2385 2386 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2387 2388 return(XY_ERA_SOFT); /* an FYI error */ 2389 2390 case XY_ERR_WPRO: 2391 2392 return(XY_ERA_WPRO); /* write protect */ 2393 } 2394 2395 return(XY_ERA_PROG); /* ??? */ 2396 } 2397
Indexes created Tue Sep 30 11:09:46 GMT 2025