xy.c revision 1.63
1 /* $NetBSD: xy.c,v 1.63 2006/05/10 06:24:03 skrll 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 1.63 2006/05/10 06:24:03 skrll 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 u_long addr = (u_long)ADDR; \ 105 (XYC)->xyc_addr_lo = ((addr) & 0xff); \ 106 (addr) = ((addr) >> 8); \ 107 (XYC)->xyc_addr_hi = ((addr) & 0xff); \ 108 (addr) = ((addr) >> 8); \ 109 (XYC)->xyc_reloc_lo = ((addr) & 0xff); \ 110 (addr) = ((addr) >> 8); \ 111 (XYC)->xyc_reloc_hi = (addr); \ 112 (XYC)->xyc_csr = XYC_GBSY; /* go! */ \ 113 } 114 115 /* 116 * XYC_DONE: don't need IORQ, get error code and free (done after xyc_cmd) 117 */ 118 119 #define XYC_DONE(SC,ER) { \ 120 if ((ER) == XY_ERR_AOK) { \ 121 (ER) = (SC)->ciorq->errno; \ 122 (SC)->ciorq->mode = XY_SUB_FREE; \ 123 wakeup((SC)->ciorq); \ 124 } \ 125 } 126 127 /* 128 * XYC_ADVANCE: advance iorq's pointers by a number of sectors 129 */ 130 131 #define XYC_ADVANCE(IORQ, N) { \ 132 if (N) { \ 133 (IORQ)->sectcnt -= (N); \ 134 (IORQ)->blockno += (N); \ 135 (IORQ)->dbuf += ((N)*XYFM_BPS); \ 136 } \ 137 } 138 139 /* 140 * note - addresses you can sleep on: 141 * [1] & of xy_softc's "state" (waiting for a chance to attach a drive) 142 * [2] & an iorq (waiting for an XY_SUB_WAIT iorq to finish) 143 */ 144 145 146 /* 147 * function prototypes 148 * "xyc_*" functions are internal, all others are external interfaces 149 */ 150 151 extern int pil_to_vme[]; /* from obio.c */ 152 153 /* internals */ 154 struct xy_iopb *xyc_chain(struct xyc_softc *, struct xy_iorq *); 155 int xyc_cmd(struct xyc_softc *, int, int, int, int, int, char *, int); 156 const char *xyc_e2str(int); 157 int xyc_entoact(int); 158 int xyc_error(struct xyc_softc *, struct xy_iorq *, 159 struct xy_iopb *, int); 160 int xyc_ioctlcmd(struct xy_softc *, dev_t dev, struct xd_iocmd *); 161 void xyc_perror(struct xy_iorq *, struct xy_iopb *, int); 162 int xyc_piodriver(struct xyc_softc *, struct xy_iorq *); 163 int xyc_remove_iorq(struct xyc_softc *); 164 int xyc_reset(struct xyc_softc *, int, struct xy_iorq *, int, 165 struct xy_softc *); 166 inline void xyc_rqinit(struct xy_iorq *, struct xyc_softc *, 167 struct xy_softc *, int, u_long, int, 168 caddr_t, struct buf *); 169 void xyc_rqtopb(struct xy_iorq *, struct xy_iopb *, int, int); 170 void xyc_start(struct xyc_softc *, struct xy_iorq *); 171 int xyc_startbuf(struct xyc_softc *, struct xy_softc *, struct buf *); 172 int xyc_submit_iorq(struct xyc_softc *, struct xy_iorq *, int); 173 void xyc_tick(void *); 174 int xyc_unbusy(struct xyc *, int); 175 void xyc_xyreset(struct xyc_softc *, struct xy_softc *); 176 int xy_dmamem_alloc(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 177 int *, bus_size_t, caddr_t *, bus_addr_t *); 178 void xy_dmamem_free(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 179 int, bus_size_t, caddr_t); 180 181 /* machine interrupt hook */ 182 int xycintr(void *); 183 184 /* autoconf */ 185 int xycmatch(struct device *, struct cfdata *, void *); 186 void xycattach(struct device *, struct device *, void *); 187 int xymatch(struct device *, struct cfdata *, void *); 188 void xyattach(struct device *, struct device *, void *); 189 static int xyc_probe(void *, bus_space_tag_t, bus_space_handle_t); 190 191 static void xydummystrat(struct buf *); 192 int xygetdisklabel(struct xy_softc *, void *); 193 194 /* 195 * cfattach's: device driver interface to autoconfig 196 */ 197 198 CFATTACH_DECL(xyc, sizeof(struct xyc_softc), 199 xycmatch, xycattach, NULL, NULL); 200 201 CFATTACH_DECL(xy, sizeof(struct xy_softc), 202 xymatch, xyattach, NULL, NULL); 203 204 extern struct cfdriver xy_cd; 205 206 dev_type_open(xyopen); 207 dev_type_close(xyclose); 208 dev_type_read(xyread); 209 dev_type_write(xywrite); 210 dev_type_ioctl(xyioctl); 211 dev_type_strategy(xystrategy); 212 dev_type_dump(xydump); 213 dev_type_size(xysize); 214 215 const struct bdevsw xy_bdevsw = { 216 xyopen, xyclose, xystrategy, xyioctl, xydump, xysize, D_DISK 217 }; 218 219 const struct cdevsw xy_cdevsw = { 220 xyopen, xyclose, xyread, xywrite, xyioctl, 221 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 222 }; 223 224 struct xyc_attach_args { /* this is the "aux" args to xyattach */ 225 int driveno; /* unit number */ 226 int fullmode; /* submit mode */ 227 int booting; /* are we booting or not? */ 228 }; 229 230 /* 231 * dkdriver 232 */ 233 234 struct dkdriver xydkdriver = { xystrategy }; 235 236 /* 237 * start: disk label fix code (XXX) 238 */ 239 240 static void *xy_labeldata; 241 242 static void 243 xydummystrat(bp) 244 struct buf *bp; 245 { 246 if (bp->b_bcount != XYFM_BPS) 247 panic("xydummystrat"); 248 bcopy(xy_labeldata, bp->b_data, XYFM_BPS); 249 bp->b_flags |= B_DONE; 250 bp->b_flags &= ~B_BUSY; 251 } 252 253 int 254 xygetdisklabel(xy, b) 255 struct xy_softc *xy; 256 void *b; 257 { 258 const char *err; 259 #if defined(__sparc__) || defined(sun3) 260 struct sun_disklabel *sdl; 261 #endif 262 263 /* We already have the label data in `b'; setup for dummy strategy */ 264 xy_labeldata = b; 265 266 /* Required parameter for readdisklabel() */ 267 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; 268 269 err = readdisklabel(MAKEDISKDEV(0, device_unit(&xy->sc_dev), RAW_PART), 270 xydummystrat, 271 xy->sc_dk.dk_label, xy->sc_dk.dk_cpulabel); 272 if (err) { 273 printf("%s: %s\n", xy->sc_dev.dv_xname, err); 274 return(XY_ERR_FAIL); 275 } 276 277 #if defined(__sparc__) || defined(sun3) 278 /* Ok, we have the label; fill in `pcyl' if there's SunOS magic */ 279 sdl = (struct sun_disklabel *)xy->sc_dk.dk_cpulabel->cd_block; 280 if (sdl->sl_magic == SUN_DKMAGIC) { 281 xy->pcyl = sdl->sl_pcylinders; 282 } else 283 #endif 284 { 285 printf("%s: WARNING: no `pcyl' in disk label.\n", 286 xy->sc_dev.dv_xname); 287 xy->pcyl = xy->sc_dk.dk_label->d_ncylinders + 288 xy->sc_dk.dk_label->d_acylinders; 289 printf("%s: WARNING: guessing pcyl=%d (ncyl+acyl)\n", 290 xy->sc_dev.dv_xname, xy->pcyl); 291 } 292 293 xy->ncyl = xy->sc_dk.dk_label->d_ncylinders; 294 xy->acyl = xy->sc_dk.dk_label->d_acylinders; 295 xy->nhead = xy->sc_dk.dk_label->d_ntracks; 296 xy->nsect = xy->sc_dk.dk_label->d_nsectors; 297 xy->sectpercyl = xy->nhead * xy->nsect; 298 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; /* not handled by 299 * sun->bsd */ 300 return(XY_ERR_AOK); 301 } 302 303 /* 304 * end: disk label fix code (XXX) 305 */ 306 307 /* 308 * Shorthand for allocating, mapping and loading a DMA buffer 309 */ 310 int 311 xy_dmamem_alloc(tag, map, seg, nsegp, len, kvap, dmap) 312 bus_dma_tag_t tag; 313 bus_dmamap_t map; 314 bus_dma_segment_t *seg; 315 int *nsegp; 316 bus_size_t len; 317 caddr_t *kvap; 318 bus_addr_t *dmap; 319 { 320 int nseg; 321 int error; 322 323 if ((error = bus_dmamem_alloc(tag, len, 0, 0, 324 seg, 1, &nseg, BUS_DMA_NOWAIT)) != 0) { 325 return (error); 326 } 327 328 if ((error = bus_dmamem_map(tag, seg, nseg, 329 len, kvap, 330 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 331 bus_dmamem_free(tag, seg, nseg); 332 return (error); 333 } 334 335 if ((error = bus_dmamap_load(tag, map, *kvap, len, NULL, 336 BUS_DMA_NOWAIT)) != 0) { 337 bus_dmamem_unmap(tag, *kvap, len); 338 bus_dmamem_free(tag, seg, nseg); 339 return (error); 340 } 341 342 *dmap = map->dm_segs[0].ds_addr; 343 *nsegp = nseg; 344 return (0); 345 } 346 347 void 348 xy_dmamem_free(tag, map, seg, nseg, len, kva) 349 bus_dma_tag_t tag; 350 bus_dmamap_t map; 351 bus_dma_segment_t *seg; 352 int nseg; 353 bus_size_t len; 354 caddr_t kva; 355 { 356 357 bus_dmamap_unload(tag, map); 358 bus_dmamem_unmap(tag, kva, len); 359 bus_dmamem_free(tag, seg, nseg); 360 } 361 362 363 /* 364 * a u t o c o n f i g f u n c t i o n s 365 */ 366 367 /* 368 * xycmatch: determine if xyc is present or not. we do a 369 * soft reset to detect the xyc. 370 */ 371 int 372 xyc_probe(arg, tag, handle) 373 void *arg; 374 bus_space_tag_t tag; 375 bus_space_handle_t handle; 376 { 377 struct xyc *xyc = (void *)handle; /* XXX */ 378 379 return ((xyc_unbusy(xyc, XYC_RESETUSEC) != XY_ERR_FAIL) ? 0 : EIO); 380 } 381 382 int xycmatch(parent, cf, aux) 383 struct device *parent; 384 struct cfdata *cf; 385 void *aux; 386 { 387 struct vme_attach_args *va = aux; 388 vme_chipset_tag_t ct = va->va_vct; 389 vme_am_t mod; 390 int error; 391 392 mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 393 if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod)) 394 return (0); 395 396 error = vme_probe(ct, va->r[0].offset, sizeof(struct xyc), 397 mod, VME_D16, xyc_probe, 0); 398 vme_space_free(va->va_vct, va->r[0].offset, sizeof(struct xyc), mod); 399 400 return (error == 0); 401 } 402 403 /* 404 * xycattach: attach controller 405 */ 406 void 407 xycattach(parent, self, aux) 408 struct device *parent, *self; 409 void *aux; 410 411 { 412 struct xyc_softc *xyc = (void *) self; 413 struct vme_attach_args *va = aux; 414 vme_chipset_tag_t ct = va->va_vct; 415 bus_space_tag_t bt; 416 bus_space_handle_t bh; 417 vme_intr_handle_t ih; 418 vme_am_t mod; 419 struct xyc_attach_args xa; 420 int lcv, res, error; 421 bus_dma_segment_t seg; 422 int rseg; 423 vme_mapresc_t resc; 424 bus_addr_t busaddr; 425 426 /* get addressing and intr level stuff from autoconfig and load it 427 * into our xyc_softc. */ 428 429 mod = VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 430 431 if (vme_space_alloc(ct, va->r[0].offset, sizeof(struct xyc), mod)) 432 panic("xyc: vme alloc"); 433 434 if (vme_space_map(ct, va->r[0].offset, sizeof(struct xyc), 435 mod, VME_D16, 0, &bt, &bh, &resc) != 0) 436 panic("xyc: vme_map"); 437 438 xyc->xyc = (struct xyc *) bh; /* XXX */ 439 xyc->ipl = va->ilevel; 440 xyc->vector = va->ivector; 441 xyc->no_ols = 0; /* XXX should be from config */ 442 443 for (lcv = 0; lcv < XYC_MAXDEV; lcv++) 444 xyc->sc_drives[lcv] = (struct xy_softc *) 0; 445 446 /* 447 * allocate and zero buffers 448 * check boundaries of the KVA's ... all IOPBs must reside in 449 * the same 64K region. 450 */ 451 452 /* Get DMA handle for misc. transfers */ 453 if ((error = vme_dmamap_create( 454 ct, /* VME chip tag */ 455 MAXPHYS, /* size */ 456 VME_AM_A24, /* address modifier */ 457 VME_D16, /* data size */ 458 0, /* swap */ 459 1, /* nsegments */ 460 MAXPHYS, /* maxsegsz */ 461 0, /* boundary */ 462 BUS_DMA_NOWAIT, 463 &xyc->auxmap)) != 0) { 464 465 printf("%s: DMA buffer map create error %d\n", 466 xyc->sc_dev.dv_xname, error); 467 return; 468 } 469 470 /* Get DMA handle for mapping iorq descriptors */ 471 if ((error = vme_dmamap_create( 472 ct, /* VME chip tag */ 473 XYC_MAXIOPB * sizeof(struct xy_iopb), 474 VME_AM_A24, /* address modifier */ 475 VME_D16, /* data size */ 476 0, /* swap */ 477 1, /* nsegments */ 478 XYC_MAXIOPB * sizeof(struct xy_iopb), 479 64*1024, /* boundary */ 480 BUS_DMA_NOWAIT, 481 &xyc->iopmap)) != 0) { 482 483 printf("%s: DMA buffer map create error %d\n", 484 xyc->sc_dev.dv_xname, error); 485 return; 486 } 487 488 /* Get DMA buffer for iorq descriptors */ 489 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->iopmap, &seg, &rseg, 490 XYC_MAXIOPB * sizeof(struct xy_iopb), 491 (caddr_t *)&xyc->iopbase, 492 &busaddr)) != 0) { 493 printf("%s: DMA buffer alloc error %d\n", 494 xyc->sc_dev.dv_xname, error); 495 return; 496 } 497 xyc->dvmaiopb = (struct xy_iopb *)(u_long)BUS_ADDR_PADDR(busaddr); 498 499 bzero(xyc->iopbase, XYC_MAXIOPB * sizeof(struct xy_iopb)); 500 501 xyc->reqs = (struct xy_iorq *) 502 malloc(XYC_MAXIOPB * sizeof(struct xy_iorq), 503 M_DEVBUF, M_NOWAIT|M_ZERO); 504 if (xyc->reqs == NULL) 505 panic("xyc malloc"); 506 507 /* 508 * init iorq to iopb pointers, and non-zero fields in the 509 * iopb which never change. 510 */ 511 512 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 513 xyc->xy_chain[lcv] = NULL; 514 xyc->reqs[lcv].iopb = &xyc->iopbase[lcv]; 515 xyc->reqs[lcv].dmaiopb = &xyc->dvmaiopb[lcv]; 516 xyc->iopbase[lcv].asr = 1; /* always the same */ 517 xyc->iopbase[lcv].eef = 1; /* always the same */ 518 xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */ 519 xyc->iopbase[lcv].aud = 1; /* always the same */ 520 xyc->iopbase[lcv].relo = 1; /* always the same */ 521 xyc->iopbase[lcv].thro = XY_THRO;/* always the same */ 522 523 if ((error = vme_dmamap_create( 524 ct, /* VME chip tag */ 525 MAXPHYS, /* size */ 526 VME_AM_A24, /* address modifier */ 527 VME_D16, /* data size */ 528 0, /* swap */ 529 1, /* nsegments */ 530 MAXPHYS, /* maxsegsz */ 531 0, /* boundary */ 532 BUS_DMA_NOWAIT, 533 &xyc->reqs[lcv].dmamap)) != 0) { 534 535 printf("%s: DMA buffer map create error %d\n", 536 xyc->sc_dev.dv_xname, error); 537 return; 538 } 539 } 540 xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */ 541 xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */ 542 xyc->xy_hand = 0; 543 544 /* read controller parameters and insure we have a 450/451 */ 545 546 error = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL); 547 res = xyc->ciopb->ctyp; 548 XYC_DONE(xyc, error); 549 if (res != XYCT_450) { 550 if (error) 551 printf(": %s: ", xyc_e2str(error)); 552 printf(": doesn't identify as a 450/451\n"); 553 return; 554 } 555 printf(": Xylogics 450/451"); 556 if (xyc->no_ols) 557 printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */ 558 printf("\n"); 559 if (error) { 560 printf("%s: error: %s\n", xyc->sc_dev.dv_xname, 561 xyc_e2str(error)); 562 return; 563 } 564 if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) { 565 printf("%s: 24 bit addressing turned off\n", 566 xyc->sc_dev.dv_xname); 567 printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n"); 568 printf("to enable 24 bit mode and this driver\n"); 569 return; 570 } 571 572 /* link in interrupt with higher level software */ 573 vme_intr_map(ct, va->ilevel, va->ivector, &ih); 574 vme_intr_establish(ct, ih, IPL_BIO, xycintr, xyc); 575 evcnt_attach_dynamic(&xyc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 576 xyc->sc_dev.dv_xname, "intr"); 577 578 callout_init(&xyc->sc_tick_ch); 579 580 /* now we must look for disks using autoconfig */ 581 xa.fullmode = XY_SUB_POLL; 582 xa.booting = 1; 583 584 for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++) 585 (void) config_found(self, (void *) &xa, NULL); 586 587 /* start the watchdog clock */ 588 callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc); 589 590 } 591 592 /* 593 * xymatch: probe for disk. 594 * 595 * note: we almost always say disk is present. this allows us to 596 * spin up and configure a disk after the system is booted (we can 597 * call xyattach!). 598 */ 599 int 600 xymatch(parent, cf, aux) 601 struct device *parent; 602 struct cfdata *cf; 603 void *aux; 604 { 605 struct xyc_attach_args *xa = aux; 606 607 /* looking for autoconf wildcard or exact match */ 608 609 if (cf->cf_loc[XYCCF_DRIVE] != XYCCF_DRIVE_DEFAULT && 610 cf->cf_loc[XYCCF_DRIVE] != xa->driveno) 611 return 0; 612 613 return 1; 614 615 } 616 617 /* 618 * xyattach: attach a disk. this can be called from autoconf and also 619 * from xyopen/xystrategy. 620 */ 621 void 622 xyattach(parent, self, aux) 623 struct device *parent, *self; 624 void *aux; 625 626 { 627 struct xy_softc *xy = (void *) self, *oxy; 628 struct xyc_softc *xyc = (void *) parent; 629 struct xyc_attach_args *xa = aux; 630 int spt, mb, blk, lcv, fmode, s = 0, newstate; 631 struct dkbad *dkb; 632 int rseg, error; 633 bus_dma_segment_t seg; 634 bus_addr_t busaddr; 635 caddr_t dmaddr; 636 caddr_t buf; 637 638 /* 639 * Always re-initialize the disk structure. We want statistics 640 * to start with a clean slate. 641 */ 642 bzero(&xy->sc_dk, sizeof(xy->sc_dk)); 643 xy->sc_dk.dk_driver = &xydkdriver; 644 xy->sc_dk.dk_name = xy->sc_dev.dv_xname; 645 646 /* if booting, init the xy_softc */ 647 648 if (xa->booting) { 649 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 650 xy->flags = 0; 651 xy->parent = xyc; 652 653 /* init queue of waiting bufs */ 654 655 bufq_alloc(&xy->xyq, "disksort", BUFQ_SORT_RAWBLOCK); 656 657 xy->xyrq = &xyc->reqs[xa->driveno]; 658 659 } 660 xy->xy_drive = xa->driveno; 661 fmode = xa->fullmode; 662 xyc->sc_drives[xa->driveno] = xy; 663 664 /* if not booting, make sure we are the only process in the attach for 665 * this drive. if locked out, sleep on it. */ 666 667 if (!xa->booting) { 668 s = splbio(); 669 while (xy->state == XY_DRIVE_ATTACHING) { 670 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 671 splx(s); 672 return; 673 } 674 } 675 printf("%s at %s", 676 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 677 } 678 679 /* we now have control */ 680 xy->state = XY_DRIVE_ATTACHING; 681 newstate = XY_DRIVE_UNKNOWN; 682 683 buf = NULL; 684 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->auxmap, &seg, &rseg, 685 XYFM_BPS, 686 (caddr_t *)&buf, 687 &busaddr)) != 0) { 688 printf("%s: DMA buffer alloc error %d\n", 689 xyc->sc_dev.dv_xname, error); 690 return; 691 } 692 dmaddr = (caddr_t)(u_long)BUS_ADDR_PADDR(busaddr); 693 694 /* first try and reset the drive */ 695 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 696 XYC_DONE(xyc, error); 697 if (error == XY_ERR_DNRY) { 698 printf(" drive %d: off-line\n", xa->driveno); 699 goto done; 700 } 701 if (error) { 702 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 703 goto done; 704 } 705 printf(" drive %d: ready", xa->driveno); 706 707 /* 708 * now set drive parameters (to semi-bogus values) so we can read the 709 * disk label. 710 */ 711 xy->pcyl = xy->ncyl = 1; 712 xy->acyl = 0; 713 xy->nhead = 1; 714 xy->nsect = 1; 715 xy->sectpercyl = 1; 716 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 717 xy->dkb.bt_bad[lcv].bt_cyl = 718 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 719 720 /* read disk label */ 721 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 722 xy->drive_type++) { 723 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 724 dmaddr, fmode); 725 XYC_DONE(xyc, error); 726 if (error == XY_ERR_AOK) break; 727 } 728 729 if (error != XY_ERR_AOK) { 730 printf("\n%s: reading disk label failed: %s\n", 731 xy->sc_dev.dv_xname, xyc_e2str(error)); 732 goto done; 733 } 734 printf(" (drive type %d)\n", xy->drive_type); 735 736 newstate = XY_DRIVE_NOLABEL; 737 738 xy->hw_spt = spt = 0; /* XXX needed ? */ 739 /* Attach the disk: must be before getdisklabel to malloc label */ 740 disk_attach(&xy->sc_dk); 741 742 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 743 goto done; 744 745 /* inform the user of what is up */ 746 printf("%s: <%s>, pcyl %d\n", xy->sc_dev.dv_xname, 747 buf, xy->pcyl); 748 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 749 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 750 xy->sc_dev.dv_xname, mb, xy->ncyl, xy->nhead, xy->nsect, 751 XYFM_BPS); 752 753 /* 754 * 450/451 stupidity: the drive type is encoded into the format 755 * of the disk. the drive type in the IOPB must match the drive 756 * type in the format, or you will not be able to do I/O to the 757 * disk (you get header not found errors). if you have two drives 758 * of different sizes that have the same drive type in their 759 * formatting then you are out of luck. 760 * 761 * this problem was corrected in the 753/7053. 762 */ 763 764 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 765 oxy = xyc->sc_drives[lcv]; 766 if (oxy == NULL || oxy == xy) continue; 767 if (oxy->drive_type != xy->drive_type) continue; 768 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 769 xy->nhead != oxy->nhead) { 770 printf("%s: %s and %s must be the same size!\n", 771 xyc->sc_dev.dv_xname, xy->sc_dev.dv_xname, 772 oxy->sc_dev.dv_xname); 773 panic("xy drive size mismatch"); 774 } 775 } 776 777 778 /* now set the real drive parameters! */ 779 780 blk = (xy->nsect - 1) + 781 ((xy->nhead - 1) * xy->nsect) + 782 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 783 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 784 XYC_DONE(xyc, error); 785 if (error) { 786 printf("%s: write drive size failed: %s\n", 787 xy->sc_dev.dv_xname, xyc_e2str(error)); 788 goto done; 789 } 790 newstate = XY_DRIVE_ONLINE; 791 792 /* 793 * read bad144 table. this table resides on the first sector of the 794 * last track of the disk (i.e. second cyl of "acyl" area). 795 */ 796 797 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 798 /* last cyl */ 799 (xy->nhead - 1) * xy->nsect; /* last head */ 800 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 801 dmaddr, fmode); 802 XYC_DONE(xyc, error); 803 if (error) { 804 printf("%s: reading bad144 failed: %s\n", 805 xy->sc_dev.dv_xname, xyc_e2str(error)); 806 goto done; 807 } 808 809 /* check dkbad for sanity */ 810 dkb = (struct dkbad *) buf; 811 for (lcv = 0; lcv < 126; lcv++) { 812 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 813 dkb->bt_bad[lcv].bt_cyl == 0) && 814 dkb->bt_bad[lcv].bt_trksec == 0xffff) 815 continue; /* blank */ 816 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 817 break; 818 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 819 break; 820 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 821 break; 822 } 823 if (lcv != 126) { 824 printf("%s: warning: invalid bad144 sector!\n", 825 xy->sc_dev.dv_xname); 826 } else { 827 bcopy(buf, &xy->dkb, XYFM_BPS); 828 } 829 830 done: 831 if (buf != NULL) { 832 xy_dmamem_free(xyc->dmatag, xyc->auxmap, 833 &seg, rseg, XYFM_BPS, buf); 834 } 835 836 xy->state = newstate; 837 if (!xa->booting) { 838 wakeup(&xy->state); 839 splx(s); 840 } 841 } 842 843 /* 844 * end of autoconfig functions 845 */ 846 847 /* 848 * { b , c } d e v s w f u n c t i o n s 849 */ 850 851 /* 852 * xyclose: close device 853 */ 854 int 855 xyclose(dev, flag, fmt, l) 856 dev_t dev; 857 int flag, fmt; 858 struct lwp *l; 859 860 { 861 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 862 int part = DISKPART(dev); 863 864 /* clear mask bits */ 865 866 switch (fmt) { 867 case S_IFCHR: 868 xy->sc_dk.dk_copenmask &= ~(1 << part); 869 break; 870 case S_IFBLK: 871 xy->sc_dk.dk_bopenmask &= ~(1 << part); 872 break; 873 } 874 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 875 876 return 0; 877 } 878 879 /* 880 * xydump: crash dump system 881 */ 882 int 883 xydump(dev, blkno, va, size) 884 dev_t dev; 885 daddr_t blkno; 886 caddr_t va; 887 size_t size; 888 { 889 int unit, part; 890 struct xy_softc *xy; 891 892 unit = DISKUNIT(dev); 893 if (unit >= xy_cd.cd_ndevs) 894 return ENXIO; 895 part = DISKPART(dev); 896 897 xy = xy_cd.cd_devs[unit]; 898 899 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 900 'a' + part); 901 902 return ENXIO; 903 904 /* outline: globals: "dumplo" == sector number of partition to start 905 * dump at (convert to physical sector with partition table) 906 * "dumpsize" == size of dump in clicks "physmem" == size of physical 907 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 908 * physmem) 909 * 910 * dump a copy of physical memory to the dump device starting at sector 911 * "dumplo" in the swap partition (make sure > 0). map in pages as 912 * we go. use polled I/O. 913 * 914 * XXX how to handle NON_CONTIG? */ 915 916 } 917 918 /* 919 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 920 */ 921 int 922 xyioctl(dev, command, addr, flag, l) 923 dev_t dev; 924 u_long command; 925 caddr_t addr; 926 int flag; 927 struct lwp *l; 928 929 { 930 struct xy_softc *xy; 931 struct xd_iocmd *xio; 932 int error, s, unit; 933 #ifdef __HAVE_OLD_DISKLABEL 934 struct disklabel newlabel; 935 #endif 936 struct disklabel *lp; 937 938 unit = DISKUNIT(dev); 939 940 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 941 return (ENXIO); 942 943 /* switch on ioctl type */ 944 945 switch (command) { 946 case DIOCSBAD: /* set bad144 info */ 947 if ((flag & FWRITE) == 0) 948 return EBADF; 949 s = splbio(); 950 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 951 splx(s); 952 return 0; 953 954 case DIOCGDINFO: /* get disk label */ 955 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 956 return 0; 957 #ifdef __HAVE_OLD_DISKLABEL 958 case ODIOCGDINFO: 959 newlabel = *(xy->sc_dk.dk_label); 960 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 961 return ENOTTY; 962 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 963 return 0; 964 #endif 965 966 case DIOCGPART: /* get partition info */ 967 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 968 ((struct partinfo *) addr)->part = 969 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 970 return 0; 971 972 case DIOCSDINFO: /* set disk label */ 973 #ifdef __HAVE_OLD_DISKLABEL 974 case ODIOCSDINFO: 975 if (command == ODIOCSDINFO) { 976 memset(&newlabel, 0, sizeof newlabel); 977 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 978 lp = &newlabel; 979 } else 980 #endif 981 lp = (struct disklabel *)addr; 982 983 if ((flag & FWRITE) == 0) 984 return EBADF; 985 error = setdisklabel(xy->sc_dk.dk_label, 986 lp, /* xy->sc_dk.dk_openmask : */ 0, 987 xy->sc_dk.dk_cpulabel); 988 if (error == 0) { 989 if (xy->state == XY_DRIVE_NOLABEL) 990 xy->state = XY_DRIVE_ONLINE; 991 } 992 return error; 993 994 case DIOCWLABEL: /* change write status of disk label */ 995 if ((flag & FWRITE) == 0) 996 return EBADF; 997 if (*(int *) addr) 998 xy->flags |= XY_WLABEL; 999 else 1000 xy->flags &= ~XY_WLABEL; 1001 return 0; 1002 1003 case DIOCWDINFO: /* write disk label */ 1004 #ifdef __HAVE_OLD_DISKLABEL 1005 case ODIOCWDINFO: 1006 if (command == ODIOCWDINFO) { 1007 memset(&newlabel, 0, sizeof newlabel); 1008 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 1009 lp = &newlabel; 1010 } else 1011 #endif 1012 lp = (struct disklabel *)addr; 1013 1014 if ((flag & FWRITE) == 0) 1015 return EBADF; 1016 error = setdisklabel(xy->sc_dk.dk_label, 1017 lp, /* xy->sc_dk.dk_openmask : */ 0, 1018 xy->sc_dk.dk_cpulabel); 1019 if (error == 0) { 1020 if (xy->state == XY_DRIVE_NOLABEL) 1021 xy->state = XY_DRIVE_ONLINE; 1022 1023 /* Simulate opening partition 0 so write succeeds. */ 1024 xy->sc_dk.dk_openmask |= (1 << 0); 1025 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 1026 xystrategy, xy->sc_dk.dk_label, 1027 xy->sc_dk.dk_cpulabel); 1028 xy->sc_dk.dk_openmask = 1029 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1030 } 1031 return error; 1032 1033 case DIOSXDCMD: 1034 xio = (struct xd_iocmd *) addr; 1035 if ((error = suser(l->l_proc->p_ucred, &l->l_proc->p_acflag)) != 0) 1036 return (error); 1037 return (xyc_ioctlcmd(xy, dev, xio)); 1038 1039 default: 1040 return ENOTTY; 1041 } 1042 } 1043 1044 /* 1045 * xyopen: open drive 1046 */ 1047 1048 int 1049 xyopen(dev, flag, fmt, l) 1050 dev_t dev; 1051 int flag, fmt; 1052 struct lwp *l; 1053 { 1054 int unit, part; 1055 struct xy_softc *xy; 1056 struct xyc_attach_args xa; 1057 1058 /* first, could it be a valid target? */ 1059 1060 unit = DISKUNIT(dev); 1061 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 1062 return (ENXIO); 1063 part = DISKPART(dev); 1064 1065 /* do we need to attach the drive? */ 1066 1067 if (xy->state == XY_DRIVE_UNKNOWN) { 1068 xa.driveno = xy->xy_drive; 1069 xa.fullmode = XY_SUB_WAIT; 1070 xa.booting = 0; 1071 xyattach((struct device *) xy->parent, 1072 (struct device *) xy, &xa); 1073 if (xy->state == XY_DRIVE_UNKNOWN) { 1074 return (EIO); 1075 } 1076 } 1077 /* check for partition */ 1078 1079 if (part != RAW_PART && 1080 (part >= xy->sc_dk.dk_label->d_npartitions || 1081 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1082 return (ENXIO); 1083 } 1084 /* set open masks */ 1085 1086 switch (fmt) { 1087 case S_IFCHR: 1088 xy->sc_dk.dk_copenmask |= (1 << part); 1089 break; 1090 case S_IFBLK: 1091 xy->sc_dk.dk_bopenmask |= (1 << part); 1092 break; 1093 } 1094 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1095 1096 return 0; 1097 } 1098 1099 int 1100 xyread(dev, uio, flags) 1101 dev_t dev; 1102 struct uio *uio; 1103 int flags; 1104 { 1105 1106 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1107 } 1108 1109 int 1110 xywrite(dev, uio, flags) 1111 dev_t dev; 1112 struct uio *uio; 1113 int flags; 1114 { 1115 1116 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1117 } 1118 1119 1120 /* 1121 * xysize: return size of a partition for a dump 1122 */ 1123 1124 int 1125 xysize(dev) 1126 dev_t dev; 1127 1128 { 1129 struct xy_softc *xysc; 1130 int unit, part, size, omask; 1131 1132 /* valid unit? */ 1133 unit = DISKUNIT(dev); 1134 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1135 return (-1); 1136 1137 part = DISKPART(dev); 1138 omask = xysc->sc_dk.dk_openmask & (1 << part); 1139 1140 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1141 return (-1); 1142 1143 /* do it */ 1144 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1145 size = -1; /* only give valid size for swap partitions */ 1146 else 1147 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1148 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1149 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1150 return (-1); 1151 return (size); 1152 } 1153 1154 /* 1155 * xystrategy: buffering system interface to xy. 1156 */ 1157 1158 void 1159 xystrategy(bp) 1160 struct buf *bp; 1161 1162 { 1163 struct xy_softc *xy; 1164 int s, unit; 1165 struct xyc_attach_args xa; 1166 struct disklabel *lp; 1167 daddr_t blkno; 1168 1169 unit = DISKUNIT(bp->b_dev); 1170 1171 /* check for live device */ 1172 1173 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1174 bp->b_blkno < 0 || 1175 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1176 bp->b_error = EINVAL; 1177 goto bad; 1178 } 1179 /* do we need to attach the drive? */ 1180 1181 if (xy->state == XY_DRIVE_UNKNOWN) { 1182 xa.driveno = xy->xy_drive; 1183 xa.fullmode = XY_SUB_WAIT; 1184 xa.booting = 0; 1185 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1186 if (xy->state == XY_DRIVE_UNKNOWN) { 1187 bp->b_error = EIO; 1188 goto bad; 1189 } 1190 } 1191 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1192 /* no I/O to unlabeled disks, unless raw partition */ 1193 bp->b_error = EIO; 1194 goto bad; 1195 } 1196 /* short circuit zero length request */ 1197 1198 if (bp->b_bcount == 0) 1199 goto done; 1200 1201 /* check bounds with label (disksubr.c). Determine the size of the 1202 * transfer, and make sure it is within the boundaries of the 1203 * partition. Adjust transfer if needed, and signal errors or early 1204 * completion. */ 1205 1206 lp = xy->sc_dk.dk_label; 1207 1208 if (bounds_check_with_label(&xy->sc_dk, bp, 1209 (xy->flags & XY_WLABEL) != 0) <= 0) 1210 goto done; 1211 1212 /* 1213 * Now convert the block number to absolute and put it in 1214 * terms of the device's logical block size. 1215 */ 1216 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1217 if (DISKPART(bp->b_dev) != RAW_PART) 1218 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1219 1220 bp->b_rawblkno = blkno; 1221 1222 /* 1223 * now we know we have a valid buf structure that we need to do I/O 1224 * on. 1225 */ 1226 s = splbio(); /* protect the queues */ 1227 1228 BUFQ_PUT(xy->xyq, bp); 1229 1230 /* start 'em up */ 1231 1232 xyc_start(xy->parent, NULL); 1233 1234 /* done! */ 1235 1236 splx(s); 1237 return; 1238 1239 bad: /* tells upper layers we have an error */ 1240 bp->b_flags |= B_ERROR; 1241 done: /* tells upper layers we are done with this 1242 * buf */ 1243 bp->b_resid = bp->b_bcount; 1244 biodone(bp); 1245 } 1246 /* 1247 * end of {b,c}devsw functions 1248 */ 1249 1250 /* 1251 * i n t e r r u p t f u n c t i o n 1252 * 1253 * xycintr: hardware interrupt. 1254 */ 1255 int 1256 xycintr(v) 1257 void *v; 1258 1259 { 1260 struct xyc_softc *xycsc = v; 1261 1262 /* kick the event counter */ 1263 1264 xycsc->sc_intrcnt.ev_count++; 1265 1266 /* remove as many done IOPBs as possible */ 1267 1268 xyc_remove_iorq(xycsc); 1269 1270 /* start any iorq's already waiting */ 1271 1272 xyc_start(xycsc, NULL); 1273 1274 return (1); 1275 } 1276 /* 1277 * end of interrupt function 1278 */ 1279 1280 /* 1281 * i n t e r n a l f u n c t i o n s 1282 */ 1283 1284 /* 1285 * xyc_rqinit: fill out the fields of an I/O request 1286 */ 1287 1288 inline void 1289 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1290 struct xy_iorq *rq; 1291 struct xyc_softc *xyc; 1292 struct xy_softc *xy; 1293 int md; 1294 u_long blk; 1295 int cnt; 1296 caddr_t db; 1297 struct buf *bp; 1298 { 1299 rq->xyc = xyc; 1300 rq->xy = xy; 1301 rq->ttl = XYC_MAXTTL + 10; 1302 rq->mode = md; 1303 rq->tries = rq->errno = rq->lasterror = 0; 1304 rq->blockno = blk; 1305 rq->sectcnt = cnt; 1306 rq->dbuf = db; 1307 rq->buf = bp; 1308 } 1309 1310 /* 1311 * xyc_rqtopb: load up an IOPB based on an iorq 1312 */ 1313 1314 void 1315 xyc_rqtopb(iorq, iopb, cmd, subfun) 1316 struct xy_iorq *iorq; 1317 struct xy_iopb *iopb; 1318 int cmd, subfun; 1319 1320 { 1321 u_long block, dp; 1322 1323 /* normal IOPB case, standard stuff */ 1324 1325 /* chain bit handled later */ 1326 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1327 iopb->com = cmd; 1328 iopb->errno = 0; 1329 iopb->errs = 0; 1330 iopb->done = 0; 1331 if (iorq->xy) { 1332 iopb->unit = iorq->xy->xy_drive; 1333 iopb->dt = iorq->xy->drive_type; 1334 } else { 1335 iopb->unit = 0; 1336 iopb->dt = 0; 1337 } 1338 block = iorq->blockno; 1339 if (iorq->xy == NULL || block == 0) { 1340 iopb->sect = iopb->head = iopb->cyl = 0; 1341 } else { 1342 iopb->sect = block % iorq->xy->nsect; 1343 block = block / iorq->xy->nsect; 1344 iopb->head = block % iorq->xy->nhead; 1345 block = block / iorq->xy->nhead; 1346 iopb->cyl = block; 1347 } 1348 iopb->scnt = iorq->sectcnt; 1349 dp = (u_long) iorq->dbuf; 1350 if (iorq->dbuf == NULL) { 1351 iopb->dataa = 0; 1352 iopb->datar = 0; 1353 } else { 1354 iopb->dataa = (dp & 0xffff); 1355 iopb->datar = ((dp & 0xff0000) >> 16); 1356 } 1357 iopb->subfn = subfun; 1358 } 1359 1360 1361 /* 1362 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1363 */ 1364 1365 int 1366 xyc_unbusy(xyc, del) 1367 1368 struct xyc *xyc; 1369 int del; 1370 1371 { 1372 while (del-- > 0) { 1373 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1374 break; 1375 DELAY(1); 1376 } 1377 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1378 } 1379 1380 /* 1381 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1382 * note that NORM requests are handled separately. 1383 */ 1384 int 1385 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1386 struct xyc_softc *xycsc; 1387 int cmd, subfn, unit, block, scnt; 1388 char *dptr; 1389 int fullmode; 1390 1391 { 1392 int submode = XY_STATE(fullmode); 1393 struct xy_iorq *iorq = xycsc->ciorq; 1394 struct xy_iopb *iopb = xycsc->ciopb; 1395 1396 /* 1397 * is someone else using the control iopq wait for it if we can 1398 */ 1399 start: 1400 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1401 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1402 return(XY_ERR_FAIL); 1403 goto start; 1404 } 1405 1406 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1407 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1408 iorq->mode = XY_SUB_FREE; 1409 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1410 } 1411 1412 /* init iorq/iopb */ 1413 1414 xyc_rqinit(iorq, xycsc, 1415 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1416 fullmode, block, scnt, dptr, NULL); 1417 1418 /* load IOPB from iorq */ 1419 1420 xyc_rqtopb(iorq, iopb, cmd, subfn); 1421 1422 /* submit it for processing */ 1423 1424 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1425 1426 return(XY_ERR_AOK); 1427 } 1428 1429 /* 1430 * xyc_startbuf 1431 * start a buffer for running 1432 */ 1433 1434 int 1435 xyc_startbuf(xycsc, xysc, bp) 1436 struct xyc_softc *xycsc; 1437 struct xy_softc *xysc; 1438 struct buf *bp; 1439 1440 { 1441 int partno, error; 1442 struct xy_iorq *iorq; 1443 struct xy_iopb *iopb; 1444 u_long block; 1445 1446 iorq = xysc->xyrq; 1447 iopb = iorq->iopb; 1448 1449 /* get buf */ 1450 1451 if (bp == NULL) 1452 panic("xyc_startbuf null buf"); 1453 1454 partno = DISKPART(bp->b_dev); 1455 #ifdef XYC_DEBUG 1456 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1457 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1458 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1459 bp->b_bcount, bp->b_data); 1460 #endif 1461 1462 /* 1463 * load request. 1464 * 1465 * note that iorq points to the buffer as mapped into DVMA space, 1466 * where as the bp->b_data points to its non-DVMA mapping. 1467 */ 1468 1469 block = bp->b_rawblkno; 1470 1471 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1472 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1473 if (error != 0) { 1474 printf("%s: warning: cannot load DMA map\n", 1475 xycsc->sc_dev.dv_xname); 1476 return (XY_ERR_FAIL); /* XXX: need some sort of 1477 * call-back scheme here? */ 1478 } 1479 1480 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1481 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1482 ? BUS_DMASYNC_PREREAD 1483 : BUS_DMASYNC_PREWRITE); 1484 1485 /* init iorq and load iopb from it */ 1486 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1487 bp->b_bcount / XYFM_BPS, 1488 (caddr_t)(u_long)iorq->dmamap->dm_segs[0].ds_addr, 1489 bp); 1490 1491 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1492 1493 /* Instrumentation. */ 1494 disk_busy(&xysc->sc_dk); 1495 1496 return (XY_ERR_AOK); 1497 } 1498 1499 1500 /* 1501 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1502 * if ok. if it fail returns an error code. type is XY_SUB_*. 1503 * 1504 * note: caller frees iorq in all cases except NORM 1505 * 1506 * return value: 1507 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1508 * WAIT: XY_AOK (success), <error-code> (failed) 1509 * POLL: <same as WAIT> 1510 * NOQ : <same as NORM> 1511 * 1512 * there are three sources for i/o requests: 1513 * [1] xystrategy: normal block I/O, using "struct buf" system. 1514 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1515 * [3] open/ioctl: these are I/O requests done in the context of a process, 1516 * and the process should block until they are done. 1517 * 1518 * software state is stored in the iorq structure. each iorq has an 1519 * iopb structure. the hardware understands the iopb structure. 1520 * every command must go through an iopb. a 450 handles one iopb at a 1521 * time, where as a 451 can take them in chains. [the 450 claims it 1522 * can handle chains, but is appears to be buggy...] iopb are allocated 1523 * in DVMA space at boot up time. each disk gets one iopb, and the 1524 * controller gets one (for POLL and WAIT commands). what happens if 1525 * the iopb is busy? for i/o type [1], the buffers are queued at the 1526 * "buff" layer and * picked up later by the interrupt routine. for case 1527 * [2] we can only be blocked if there is a WAIT type I/O request being 1528 * run. since this can only happen when we are crashing, we wait a sec 1529 * and then steal the IOPB. for case [3] the process can sleep 1530 * on the iorq free list until some iopbs are available. 1531 */ 1532 1533 1534 int 1535 xyc_submit_iorq(xycsc, iorq, type) 1536 struct xyc_softc *xycsc; 1537 struct xy_iorq *iorq; 1538 int type; 1539 1540 { 1541 struct xy_iopb *dmaiopb; 1542 1543 #ifdef XYC_DEBUG 1544 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1545 xycsc->sc_dev.dv_xname, iorq, type); 1546 #endif 1547 1548 /* first check and see if controller is busy */ 1549 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1550 #ifdef XYC_DEBUG 1551 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1552 #endif 1553 if (type == XY_SUB_NOQ) 1554 return (XY_ERR_FAIL); /* failed */ 1555 switch (type) { 1556 case XY_SUB_NORM: 1557 return XY_ERR_AOK; /* success */ 1558 case XY_SUB_WAIT: 1559 while (iorq->iopb->done == 0) { 1560 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1561 } 1562 return (iorq->errno); 1563 case XY_SUB_POLL: /* steal controller */ 1564 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1565 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1566 panic("xyc_submit_iorq: stuck xyc"); 1567 printf("%s: stole controller\n", 1568 xycsc->sc_dev.dv_xname); 1569 break; 1570 default: 1571 panic("xyc_submit_iorq adding"); 1572 } 1573 } 1574 1575 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1576 if (dmaiopb == NULL) { /* nothing doing? */ 1577 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1578 return(XY_ERR_AOK); 1579 panic("xyc_submit_iorq: xyc_chain failed!"); 1580 } 1581 1582 XYC_GO(xycsc->xyc, dmaiopb); 1583 1584 /* command now running, wrap it up */ 1585 switch (type) { 1586 case XY_SUB_NORM: 1587 case XY_SUB_NOQ: 1588 return (XY_ERR_AOK); /* success */ 1589 case XY_SUB_WAIT: 1590 while (iorq->iopb->done == 0) { 1591 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1592 } 1593 return (iorq->errno); 1594 case XY_SUB_POLL: 1595 return (xyc_piodriver(xycsc, iorq)); 1596 default: 1597 panic("xyc_submit_iorq wrap up"); 1598 } 1599 panic("xyc_submit_iorq"); 1600 return 0; /* not reached */ 1601 } 1602 1603 1604 /* 1605 * xyc_chain: build a chain. return dvma address of first element in 1606 * the chain. iorq != NULL: means we only want that item on the chain. 1607 */ 1608 1609 struct xy_iopb * 1610 xyc_chain(xycsc, iorq) 1611 struct xyc_softc *xycsc; 1612 struct xy_iorq *iorq; 1613 1614 { 1615 int togo, chain, hand; 1616 1617 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1618 1619 /* 1620 * promote control IOPB to the top 1621 */ 1622 if (iorq == NULL) { 1623 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1624 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1625 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1626 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1627 } 1628 1629 /* 1630 * special case: if iorq != NULL then we have a POLL or WAIT request. 1631 * we let these take priority and do them first. 1632 */ 1633 if (iorq) { 1634 xycsc->xy_chain[0] = iorq; 1635 iorq->iopb->chen = 0; 1636 return(iorq->dmaiopb); 1637 } 1638 1639 /* 1640 * NORM case: do round robin and maybe chain (if allowed and possible) 1641 */ 1642 chain = 0; 1643 hand = xycsc->xy_hand; 1644 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1645 1646 for (togo = XYC_MAXIOPB; togo > 0; 1647 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1648 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1649 1650 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1651 xycsc->iopbase[hand].done) 1652 continue; /* not ready-for-i/o */ 1653 1654 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1655 iopb = xycsc->xy_chain[chain]->iopb; 1656 iopb->chen = 0; 1657 if (chain != 0) { 1658 /* adding a link to a chain */ 1659 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1660 prev_iopb->chen = 1; 1661 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1662 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1663 } else { 1664 /* head of chain */ 1665 iorq = xycsc->xy_chain[chain]; 1666 } 1667 chain++; 1668 1669 /* quit if chaining dis-allowed */ 1670 if (xycsc->no_ols) 1671 break; 1672 } 1673 1674 return(iorq ? iorq->dmaiopb : NULL); 1675 } 1676 1677 /* 1678 * xyc_piodriver 1679 * 1680 * programmed i/o driver. this function takes over the computer 1681 * and drains off the polled i/o request. it returns the status of the iorq 1682 * the caller is interesting in. 1683 */ 1684 int 1685 xyc_piodriver(xycsc, iorq) 1686 struct xyc_softc *xycsc; 1687 struct xy_iorq *iorq; 1688 1689 { 1690 int nreset = 0; 1691 int retval = 0; 1692 u_long res; 1693 #ifdef XYC_DEBUG 1694 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1695 #endif 1696 1697 while (iorq->iopb->done == 0) { 1698 1699 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1700 1701 /* we expect some progress soon */ 1702 if (res == XY_ERR_FAIL && nreset >= 2) { 1703 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1704 #ifdef XYC_DEBUG 1705 printf("xyc_piodriver: timeout\n"); 1706 #endif 1707 return (XY_ERR_FAIL); 1708 } 1709 if (res == XY_ERR_FAIL) { 1710 if (xyc_reset(xycsc, 0, 1711 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1712 XY_ERR_FAIL, 1713 0) == XY_ERR_FAIL) 1714 return (XY_ERR_FAIL); /* flushes all but POLL 1715 * requests, resets */ 1716 continue; 1717 } 1718 1719 xyc_remove_iorq(xycsc); /* may resubmit request */ 1720 1721 if (iorq->iopb->done == 0) 1722 xyc_start(xycsc, iorq); 1723 } 1724 1725 /* get return value */ 1726 1727 retval = iorq->errno; 1728 1729 #ifdef XYC_DEBUG 1730 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1731 iorq->errno, xyc_e2str(iorq->errno)); 1732 #endif 1733 1734 /* start up any bufs that have queued */ 1735 1736 xyc_start(xycsc, NULL); 1737 1738 return (retval); 1739 } 1740 1741 /* 1742 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1743 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1744 */ 1745 void 1746 xyc_xyreset(xycsc, xysc) 1747 struct xyc_softc *xycsc; 1748 struct xy_softc *xysc; 1749 1750 { 1751 struct xy_iopb tmpiopb; 1752 struct xy_iopb *iopb; 1753 int del; 1754 1755 iopb = xycsc->ciopb; 1756 1757 /* Save contents */ 1758 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1759 1760 iopb->chen = iopb->done = iopb->errs = 0; 1761 iopb->ien = 0; 1762 iopb->com = XYCMD_RST; 1763 iopb->unit = xysc->xy_drive; 1764 1765 XYC_GO(xycsc->xyc, xycsc->ciorq->dmaiopb); 1766 1767 del = XYC_RESETUSEC; 1768 while (del > 0) { 1769 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1770 break; 1771 DELAY(1); 1772 del--; 1773 } 1774 1775 if (del <= 0 || iopb->errs) { 1776 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1777 xyc_e2str(iopb->errno)); 1778 del = xycsc->xyc->xyc_rsetup; 1779 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1780 panic("xyc_reset"); 1781 } else { 1782 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1783 } 1784 1785 /* Restore contents */ 1786 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1787 } 1788 1789 1790 /* 1791 * xyc_reset: reset everything: requests are marked as errors except 1792 * a polled request (which is resubmitted) 1793 */ 1794 int 1795 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1796 struct xyc_softc *xycsc; 1797 int quiet, error; 1798 struct xy_iorq *blastmode; 1799 struct xy_softc *xysc; 1800 1801 { 1802 int del = 0, lcv, retval = XY_ERR_AOK; 1803 1804 /* soft reset hardware */ 1805 1806 if (!quiet) 1807 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1808 del = xycsc->xyc->xyc_rsetup; 1809 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1810 if (del == XY_ERR_FAIL) { 1811 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1812 retval = XY_ERR_FAIL; 1813 } 1814 if (xysc) 1815 xyc_xyreset(xycsc, xysc); 1816 1817 /* fix queues based on "blast-mode" */ 1818 1819 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1820 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1821 1822 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1823 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1824 XY_STATE(iorq->mode) != XY_SUB_NORM) 1825 /* is it active? */ 1826 continue; 1827 1828 if (blastmode == XY_RSET_ALL || 1829 blastmode != iorq) { 1830 /* failed */ 1831 iorq->errno = error; 1832 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1833 switch (XY_STATE(iorq->mode)) { 1834 case XY_SUB_NORM: 1835 iorq->buf->b_error = EIO; 1836 iorq->buf->b_flags |= B_ERROR; 1837 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1838 1839 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1840 iorq->dmamap->dm_mapsize, 1841 (iorq->buf->b_flags & B_READ) 1842 ? BUS_DMASYNC_POSTREAD 1843 : BUS_DMASYNC_POSTWRITE); 1844 1845 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1846 1847 (void)BUFQ_GET(iorq->xy->xyq); 1848 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1849 (xycsc->reqs[lcv].buf->b_bcount - 1850 xycsc->reqs[lcv].buf->b_resid), 1851 (xycsc->reqs[lcv].buf->b_flags & B_READ)); 1852 biodone(iorq->buf); 1853 iorq->mode = XY_SUB_FREE; 1854 break; 1855 case XY_SUB_WAIT: 1856 wakeup(iorq); 1857 case XY_SUB_POLL: 1858 iorq->mode = 1859 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1860 break; 1861 } 1862 1863 } else { 1864 1865 /* resubmit, no need to do anything here */ 1866 } 1867 } 1868 1869 /* 1870 * now, if stuff is waiting, start it. 1871 * since we just reset it should go 1872 */ 1873 xyc_start(xycsc, NULL); 1874 1875 return (retval); 1876 } 1877 1878 /* 1879 * xyc_start: start waiting buffers 1880 */ 1881 1882 void 1883 xyc_start(xycsc, iorq) 1884 struct xyc_softc *xycsc; 1885 struct xy_iorq *iorq; 1886 1887 { 1888 int lcv; 1889 struct xy_softc *xy; 1890 1891 if (iorq == NULL) { 1892 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1893 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1894 if (BUFQ_PEEK(xy->xyq) == NULL) continue; 1895 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1896 xyc_startbuf(xycsc, xy, BUFQ_PEEK(xy->xyq)); 1897 } 1898 } 1899 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1900 } 1901 1902 /* 1903 * xyc_remove_iorq: remove "done" IOPB's. 1904 */ 1905 1906 int 1907 xyc_remove_iorq(xycsc) 1908 struct xyc_softc *xycsc; 1909 1910 { 1911 int errno, rq, comm, errs; 1912 struct xyc *xyc = xycsc->xyc; 1913 u_long addr; 1914 struct xy_iopb *iopb; 1915 struct xy_iorq *iorq; 1916 struct buf *bp; 1917 1918 if (xyc->xyc_csr & XYC_DERR) { 1919 /* 1920 * DOUBLE ERROR: should never happen under normal use. This 1921 * error is so bad, you can't even tell which IOPB is bad, so 1922 * we dump them all. 1923 */ 1924 errno = XY_ERR_DERR; 1925 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1926 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1927 printf("%s: soft reset failed!\n", 1928 xycsc->sc_dev.dv_xname); 1929 panic("xyc_remove_iorq: controller DEAD"); 1930 } 1931 return (XY_ERR_AOK); 1932 } 1933 1934 /* 1935 * get iopb that is done, loop down the chain 1936 */ 1937 1938 if (xyc->xyc_csr & XYC_ERR) { 1939 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1940 } 1941 if (xyc->xyc_csr & XYC_IPND) { 1942 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1943 } 1944 1945 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1946 iorq = xycsc->xy_chain[rq]; 1947 if (iorq == NULL) break; /* done ! */ 1948 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1949 continue; /* free, or done */ 1950 iopb = iorq->iopb; 1951 if (iopb->done == 0) 1952 continue; /* not done yet */ 1953 1954 comm = iopb->com; 1955 errs = iopb->errs; 1956 1957 if (errs) 1958 iorq->errno = iopb->errno; 1959 else 1960 iorq->errno = 0; 1961 1962 /* handle non-fatal errors */ 1963 1964 if (errs && 1965 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1966 continue; /* AOK: we resubmitted it */ 1967 1968 1969 /* this iorq is now done (hasn't been restarted or anything) */ 1970 1971 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1972 xyc_perror(iorq, iopb, 0); 1973 1974 /* now, if read/write check to make sure we got all the data 1975 * we needed. (this may not be the case if we got an error in 1976 * the middle of a multisector request). */ 1977 1978 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1979 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1980 /* we just successfully processed a bad144 sector 1981 * note: if we are in bad 144 mode, the pointers have 1982 * been advanced already (see above) and are pointing 1983 * at the bad144 sector. to exit bad144 mode, we 1984 * must advance the pointers 1 sector and issue a new 1985 * request if there are still sectors left to process 1986 * 1987 */ 1988 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1989 1990 /* exit b144 mode */ 1991 iorq->mode = iorq->mode & (~XY_MODE_B144); 1992 1993 if (iorq->sectcnt) { /* more to go! */ 1994 iorq->lasterror = iorq->errno = iopb->errno = 0; 1995 iopb->errs = iopb->done = 0; 1996 iorq->tries = 0; 1997 iopb->scnt = iorq->sectcnt; 1998 iopb->cyl = iorq->blockno / 1999 iorq->xy->sectpercyl; 2000 iopb->head = 2001 (iorq->blockno / iorq->xy->nhead) % 2002 iorq->xy->nhead; 2003 iopb->sect = iorq->blockno % XYFM_BPS; 2004 addr = (u_long) iorq->dbuf; 2005 iopb->dataa = (addr & 0xffff); 2006 iopb->datar = ((addr & 0xff0000) >> 16); 2007 /* will resubit at end */ 2008 continue; 2009 } 2010 } 2011 /* final cleanup, totally done with this request */ 2012 2013 switch (XY_STATE(iorq->mode)) { 2014 case XY_SUB_NORM: 2015 bp = iorq->buf; 2016 if (errs) { 2017 bp->b_error = EIO; 2018 bp->b_flags |= B_ERROR; 2019 bp->b_resid = iorq->sectcnt * XYFM_BPS; 2020 } else { 2021 bp->b_resid = 0; /* done */ 2022 } 2023 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 2024 iorq->dmamap->dm_mapsize, 2025 (iorq->buf->b_flags & B_READ) 2026 ? BUS_DMASYNC_POSTREAD 2027 : BUS_DMASYNC_POSTWRITE); 2028 2029 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 2030 2031 (void)BUFQ_GET(iorq->xy->xyq); 2032 disk_unbusy(&iorq->xy->sc_dk, 2033 (bp->b_bcount - bp->b_resid), 2034 (bp->b_flags & B_READ)); 2035 iorq->mode = XY_SUB_FREE; 2036 biodone(bp); 2037 break; 2038 case XY_SUB_WAIT: 2039 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2040 wakeup(iorq); 2041 break; 2042 case XY_SUB_POLL: 2043 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2044 break; 2045 } 2046 } 2047 2048 return (XY_ERR_AOK); 2049 } 2050 2051 /* 2052 * xyc_perror: print error. 2053 * - if still_trying is true: we got an error, retried and got a 2054 * different error. in that case lasterror is the old error, 2055 * and errno is the new one. 2056 * - if still_trying is not true, then if we ever had an error it 2057 * is in lasterror. also, if iorq->errno == 0, then we recovered 2058 * from that error (otherwise iorq->errno == iorq->lasterror). 2059 */ 2060 void 2061 xyc_perror(iorq, iopb, still_trying) 2062 struct xy_iorq *iorq; 2063 struct xy_iopb *iopb; 2064 int still_trying; 2065 2066 { 2067 2068 int error = iorq->lasterror; 2069 2070 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 2071 : iorq->xyc->sc_dev.dv_xname); 2072 if (iorq->buf) 2073 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2074 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2075 printf("%s %d/%d/%d: ", 2076 (iopb->com == XYCMD_RD) ? "read" : "write", 2077 iopb->cyl, iopb->head, iopb->sect); 2078 printf("%s", xyc_e2str(error)); 2079 2080 if (still_trying) 2081 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 2082 else 2083 if (iorq->errno == 0) 2084 printf(" [recovered in %d tries]", iorq->tries); 2085 2086 printf("\n"); 2087 } 2088 2089 /* 2090 * xyc_error: non-fatal error encountered... recover. 2091 * return AOK if resubmitted, return FAIL if this iopb is done 2092 */ 2093 int 2094 xyc_error(xycsc, iorq, iopb, comm) 2095 struct xyc_softc *xycsc; 2096 struct xy_iorq *iorq; 2097 struct xy_iopb *iopb; 2098 int comm; 2099 2100 { 2101 int errno = iorq->errno; 2102 int erract = xyc_entoact(errno); 2103 int oldmode, advance; 2104 #ifdef __sparc__ 2105 int i; 2106 #endif 2107 2108 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2109 oldmode = iorq->mode; 2110 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2111 /* make xyc_start ignore us */ 2112 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 2113 iorq->mode = oldmode; 2114 } 2115 /* check for read/write to a sector in bad144 table if bad: redirect 2116 * request to bad144 area */ 2117 2118 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2119 (iorq->mode & XY_MODE_B144) == 0) { 2120 advance = iorq->sectcnt - iopb->scnt; 2121 XYC_ADVANCE(iorq, advance); 2122 #ifdef __sparc__ 2123 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2124 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2125 iorq->blockno % iorq->xy->nsect)) != -1) { 2126 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2127 * redirect */ 2128 iopb->errno = iopb->done = iopb->errs = 0; 2129 iopb->scnt = 1; 2130 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2131 /* second to last acyl */ 2132 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2133 * standard */ 2134 iopb->head = i / iorq->xy->nhead; 2135 iopb->sect = i % iorq->xy->nhead; 2136 /* will resubmit when we come out of remove_iorq */ 2137 return (XY_ERR_AOK); /* recovered! */ 2138 } 2139 #endif 2140 } 2141 2142 /* 2143 * it isn't a bad144 sector, must be real error! see if we can retry 2144 * it? 2145 */ 2146 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2147 xyc_perror(iorq, iopb, 1); /* inform of error state 2148 * change */ 2149 iorq->lasterror = errno; 2150 2151 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2152 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2153 iorq->tries++; 2154 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 2155 /* will resubmit at end of remove_iorq */ 2156 return (XY_ERR_AOK); /* recovered! */ 2157 } 2158 2159 /* failed to recover from this error */ 2160 return (XY_ERR_FAIL); 2161 } 2162 2163 /* 2164 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2165 */ 2166 void 2167 xyc_tick(arg) 2168 void *arg; 2169 2170 { 2171 struct xyc_softc *xycsc = arg; 2172 int lcv, s, reset = 0; 2173 2174 /* reduce ttl for each request if one goes to zero, reset xyc */ 2175 s = splbio(); 2176 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2177 if (xycsc->reqs[lcv].mode == 0 || 2178 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2179 continue; 2180 xycsc->reqs[lcv].ttl--; 2181 if (xycsc->reqs[lcv].ttl == 0) 2182 reset = 1; 2183 } 2184 if (reset) { 2185 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2186 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2187 } 2188 splx(s); 2189 2190 /* until next time */ 2191 2192 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2193 } 2194 2195 /* 2196 * xyc_ioctlcmd: this function provides a user level interface to the 2197 * controller via ioctl. this allows "format" programs to be written 2198 * in user code, and is also useful for some debugging. we return 2199 * an error code. called at user priority. 2200 * 2201 * XXX missing a few commands (see the 7053 driver for ideas) 2202 */ 2203 int 2204 xyc_ioctlcmd(xy, dev, xio) 2205 struct xy_softc *xy; 2206 dev_t dev; 2207 struct xd_iocmd *xio; 2208 2209 { 2210 int s, rqno, dummy = 0; 2211 caddr_t dvmabuf = NULL, buf = NULL; 2212 struct xyc_softc *xycsc; 2213 int rseg, error; 2214 bus_dma_segment_t seg; 2215 2216 /* check sanity of requested command */ 2217 2218 switch (xio->cmd) { 2219 2220 case XYCMD_NOP: /* no op: everything should be zero */ 2221 if (xio->subfn || xio->dptr || xio->dlen || 2222 xio->block || xio->sectcnt) 2223 return (EINVAL); 2224 break; 2225 2226 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2227 case XYCMD_WR: 2228 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2229 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2230 return (EINVAL); 2231 break; 2232 2233 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2234 return (EINVAL); 2235 2236 break; 2237 2238 default: 2239 return (EINVAL);/* ??? */ 2240 } 2241 2242 xycsc = xy->parent; 2243 2244 /* create DVMA buffer for request if needed */ 2245 if (xio->dlen) { 2246 bus_addr_t busbuf; 2247 2248 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2249 &seg, &rseg, 2250 xio->dlen, &buf, 2251 &busbuf)) != 0) { 2252 return (error); 2253 } 2254 dvmabuf = (caddr_t)(u_long)BUS_ADDR_PADDR(busbuf); 2255 2256 if (xio->cmd == XYCMD_WR) { 2257 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2258 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2259 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2260 return (error); 2261 } 2262 } 2263 } 2264 /* do it! */ 2265 2266 error = 0; 2267 s = splbio(); 2268 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2269 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2270 if (rqno == XY_ERR_FAIL) { 2271 error = EIO; 2272 goto done; 2273 } 2274 xio->errno = xycsc->ciorq->errno; 2275 xio->tries = xycsc->ciorq->tries; 2276 XYC_DONE(xycsc, dummy); 2277 2278 if (xio->cmd == XYCMD_RD) 2279 error = copyout(buf, xio->dptr, xio->dlen); 2280 2281 done: 2282 splx(s); 2283 if (dvmabuf) { 2284 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2285 xio->dlen, buf); 2286 } 2287 return (error); 2288 } 2289 2290 /* 2291 * xyc_e2str: convert error code number into an error string 2292 */ 2293 const char * 2294 xyc_e2str(no) 2295 int no; 2296 { 2297 switch (no) { 2298 case XY_ERR_FAIL: 2299 return ("Software fatal error"); 2300 case XY_ERR_DERR: 2301 return ("DOUBLE ERROR"); 2302 case XY_ERR_AOK: 2303 return ("Successful completion"); 2304 case XY_ERR_IPEN: 2305 return("Interrupt pending"); 2306 case XY_ERR_BCFL: 2307 return("Busy conflict"); 2308 case XY_ERR_TIMO: 2309 return("Operation timeout"); 2310 case XY_ERR_NHDR: 2311 return("Header not found"); 2312 case XY_ERR_HARD: 2313 return("Hard ECC error"); 2314 case XY_ERR_ICYL: 2315 return("Illegal cylinder address"); 2316 case XY_ERR_ISEC: 2317 return("Illegal sector address"); 2318 case XY_ERR_SMAL: 2319 return("Last sector too small"); 2320 case XY_ERR_SACK: 2321 return("Slave ACK error (non-existent memory)"); 2322 case XY_ERR_CHER: 2323 return("Cylinder and head/header error"); 2324 case XY_ERR_SRTR: 2325 return("Auto-seek retry successful"); 2326 case XY_ERR_WPRO: 2327 return("Write-protect error"); 2328 case XY_ERR_UIMP: 2329 return("Unimplemented command"); 2330 case XY_ERR_DNRY: 2331 return("Drive not ready"); 2332 case XY_ERR_SZER: 2333 return("Sector count zero"); 2334 case XY_ERR_DFLT: 2335 return("Drive faulted"); 2336 case XY_ERR_ISSZ: 2337 return("Illegal sector size"); 2338 case XY_ERR_SLTA: 2339 return("Self test A"); 2340 case XY_ERR_SLTB: 2341 return("Self test B"); 2342 case XY_ERR_SLTC: 2343 return("Self test C"); 2344 case XY_ERR_SOFT: 2345 return("Soft ECC error"); 2346 case XY_ERR_SFOK: 2347 return("Soft ECC error recovered"); 2348 case XY_ERR_IHED: 2349 return("Illegal head"); 2350 case XY_ERR_DSEQ: 2351 return("Disk sequencer error"); 2352 case XY_ERR_SEEK: 2353 return("Seek error"); 2354 default: 2355 return ("Unknown error"); 2356 } 2357 } 2358 2359 int 2360 xyc_entoact(errno) 2361 2362 int errno; 2363 2364 { 2365 switch (errno) { 2366 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2367 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2368 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2369 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2370 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2371 2372 return(XY_ERA_PROG); /* program error ! */ 2373 2374 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2375 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2376 case XY_ERR_SOFT: 2377 2378 return(XY_ERA_HARD); /* hard error, retry */ 2379 2380 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2381 2382 return(XY_ERA_RSET); /* hard error reset */ 2383 2384 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2385 2386 return(XY_ERA_SOFT); /* an FYI error */ 2387 2388 case XY_ERR_WPRO: 2389 2390 return(XY_ERA_WPRO); /* write protect */ 2391 } 2392 2393 return(XY_ERA_PROG); /* ??? */ 2394 } 2395
Indexes created Tue Sep 30 11:09:46 GMT 2025