1 /* $NetBSD: xy.c,v 1.74 2007/10/19 12:01:23 ad 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@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@achilles.net>'s unfinished 450/451 driver 50 * 51 */ 52 53 #include <sys/cdefs.h> 54 __KERNEL_RCSID(0, "$NetBSD: xy.c,v 1.74 2007/10/19 12:01:23 ad 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 <sys/bus.h> 82 #include <sys/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, 0); 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 char * 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)); 644 645 /* if booting, init the xy_softc */ 646 647 if (xa->booting) { 648 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 649 xy->flags = 0; 650 xy->parent = xyc; 651 652 /* init queue of waiting bufs */ 653 654 bufq_alloc(&xy->xyq, "disksort", BUFQ_SORT_RAWBLOCK); 655 656 xy->xyrq = &xyc->reqs[xa->driveno]; 657 658 } 659 xy->xy_drive = xa->driveno; 660 fmode = xa->fullmode; 661 xyc->sc_drives[xa->driveno] = xy; 662 663 /* if not booting, make sure we are the only process in the attach for 664 * this drive. if locked out, sleep on it. */ 665 666 if (!xa->booting) { 667 s = splbio(); 668 while (xy->state == XY_DRIVE_ATTACHING) { 669 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 670 splx(s); 671 return; 672 } 673 } 674 printf("%s at %s", 675 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 676 } 677 678 /* we now have control */ 679 xy->state = XY_DRIVE_ATTACHING; 680 newstate = XY_DRIVE_UNKNOWN; 681 682 buf = NULL; 683 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->auxmap, &seg, &rseg, 684 XYFM_BPS, 685 (void **)&buf, 686 &busaddr)) != 0) { 687 printf("%s: DMA buffer alloc error %d\n", 688 xyc->sc_dev.dv_xname, error); 689 return; 690 } 691 dmaddr = (void *)(u_long)BUS_ADDR_PADDR(busaddr); 692 693 /* first try and reset the drive */ 694 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 695 XYC_DONE(xyc, error); 696 if (error == XY_ERR_DNRY) { 697 printf(" drive %d: off-line\n", xa->driveno); 698 goto done; 699 } 700 if (error) { 701 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 702 goto done; 703 } 704 printf(" drive %d: ready", xa->driveno); 705 706 /* 707 * now set drive parameters (to semi-bogus values) so we can read the 708 * disk label. 709 */ 710 xy->pcyl = xy->ncyl = 1; 711 xy->acyl = 0; 712 xy->nhead = 1; 713 xy->nsect = 1; 714 xy->sectpercyl = 1; 715 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 716 xy->dkb.bt_bad[lcv].bt_cyl = 717 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 718 719 /* read disk label */ 720 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 721 xy->drive_type++) { 722 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 723 dmaddr, fmode); 724 XYC_DONE(xyc, error); 725 if (error == XY_ERR_AOK) break; 726 } 727 728 if (error != XY_ERR_AOK) { 729 printf("\n%s: reading disk label failed: %s\n", 730 xy->sc_dev.dv_xname, xyc_e2str(error)); 731 goto done; 732 } 733 printf(" (drive type %d)\n", xy->drive_type); 734 735 newstate = XY_DRIVE_NOLABEL; 736 737 xy->hw_spt = spt = 0; /* XXX needed ? */ 738 /* Attach the disk: must be before getdisklabel to malloc label */ 739 disk_init(&xy->sc_dk, xy->sc_dev.dv_xname, &xydkdriver); 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 void *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 void *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 = kauth_authorize_generic(l->l_cred, 1036 KAUTH_GENERIC_ISSUSER, NULL)) != 0) 1037 return (error); 1038 return (xyc_ioctlcmd(xy, dev, xio)); 1039 1040 default: 1041 return ENOTTY; 1042 } 1043 } 1044 1045 /* 1046 * xyopen: open drive 1047 */ 1048 1049 int 1050 xyopen(dev, flag, fmt, l) 1051 dev_t dev; 1052 int flag, fmt; 1053 struct lwp *l; 1054 { 1055 int unit, part; 1056 struct xy_softc *xy; 1057 struct xyc_attach_args xa; 1058 1059 /* first, could it be a valid target? */ 1060 1061 unit = DISKUNIT(dev); 1062 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 1063 return (ENXIO); 1064 part = DISKPART(dev); 1065 1066 /* do we need to attach the drive? */ 1067 1068 if (xy->state == XY_DRIVE_UNKNOWN) { 1069 xa.driveno = xy->xy_drive; 1070 xa.fullmode = XY_SUB_WAIT; 1071 xa.booting = 0; 1072 xyattach((struct device *) xy->parent, 1073 (struct device *) xy, &xa); 1074 if (xy->state == XY_DRIVE_UNKNOWN) { 1075 return (EIO); 1076 } 1077 } 1078 /* check for partition */ 1079 1080 if (part != RAW_PART && 1081 (part >= xy->sc_dk.dk_label->d_npartitions || 1082 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1083 return (ENXIO); 1084 } 1085 /* set open masks */ 1086 1087 switch (fmt) { 1088 case S_IFCHR: 1089 xy->sc_dk.dk_copenmask |= (1 << part); 1090 break; 1091 case S_IFBLK: 1092 xy->sc_dk.dk_bopenmask |= (1 << part); 1093 break; 1094 } 1095 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1096 1097 return 0; 1098 } 1099 1100 int 1101 xyread(dev, uio, flags) 1102 dev_t dev; 1103 struct uio *uio; 1104 int flags; 1105 { 1106 1107 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1108 } 1109 1110 int 1111 xywrite(dev, uio, flags) 1112 dev_t dev; 1113 struct uio *uio; 1114 int flags; 1115 { 1116 1117 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1118 } 1119 1120 1121 /* 1122 * xysize: return size of a partition for a dump 1123 */ 1124 1125 int 1126 xysize(dev) 1127 dev_t dev; 1128 1129 { 1130 struct xy_softc *xysc; 1131 int unit, part, size, omask; 1132 1133 /* valid unit? */ 1134 unit = DISKUNIT(dev); 1135 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1136 return (-1); 1137 1138 part = DISKPART(dev); 1139 omask = xysc->sc_dk.dk_openmask & (1 << part); 1140 1141 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1142 return (-1); 1143 1144 /* do it */ 1145 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1146 size = -1; /* only give valid size for swap partitions */ 1147 else 1148 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1149 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1150 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1151 return (-1); 1152 return (size); 1153 } 1154 1155 /* 1156 * xystrategy: buffering system interface to xy. 1157 */ 1158 1159 void 1160 xystrategy(bp) 1161 struct buf *bp; 1162 1163 { 1164 struct xy_softc *xy; 1165 int s, unit; 1166 struct xyc_attach_args xa; 1167 struct disklabel *lp; 1168 daddr_t blkno; 1169 1170 unit = DISKUNIT(bp->b_dev); 1171 1172 /* check for live device */ 1173 1174 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1175 bp->b_blkno < 0 || 1176 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1177 bp->b_error = EINVAL; 1178 goto done; 1179 } 1180 /* do we need to attach the drive? */ 1181 1182 if (xy->state == XY_DRIVE_UNKNOWN) { 1183 xa.driveno = xy->xy_drive; 1184 xa.fullmode = XY_SUB_WAIT; 1185 xa.booting = 0; 1186 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1187 if (xy->state == XY_DRIVE_UNKNOWN) { 1188 bp->b_error = EIO; 1189 goto done; 1190 } 1191 } 1192 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1193 /* no I/O to unlabeled disks, unless raw partition */ 1194 bp->b_error = EIO; 1195 goto done; 1196 } 1197 /* short circuit zero length request */ 1198 1199 if (bp->b_bcount == 0) 1200 goto done; 1201 1202 /* check bounds with label (disksubr.c). Determine the size of the 1203 * transfer, and make sure it is within the boundaries of the 1204 * partition. Adjust transfer if needed, and signal errors or early 1205 * completion. */ 1206 1207 lp = xy->sc_dk.dk_label; 1208 1209 if (bounds_check_with_label(&xy->sc_dk, bp, 1210 (xy->flags & XY_WLABEL) != 0) <= 0) 1211 goto done; 1212 1213 /* 1214 * Now convert the block number to absolute and put it in 1215 * terms of the device's logical block size. 1216 */ 1217 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1218 if (DISKPART(bp->b_dev) != RAW_PART) 1219 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1220 1221 bp->b_rawblkno = blkno; 1222 1223 /* 1224 * now we know we have a valid buf structure that we need to do I/O 1225 * on. 1226 */ 1227 s = splbio(); /* protect the queues */ 1228 1229 BUFQ_PUT(xy->xyq, bp); 1230 1231 /* start 'em up */ 1232 1233 xyc_start(xy->parent, NULL); 1234 1235 /* done! */ 1236 1237 splx(s); 1238 return; 1239 1240 done: /* tells upper layers we are done with this 1241 * buf */ 1242 bp->b_resid = bp->b_bcount; 1243 biodone(bp); 1244 } 1245 /* 1246 * end of {b,c}devsw functions 1247 */ 1248 1249 /* 1250 * i n t e r r u p t f u n c t i o n 1251 * 1252 * xycintr: hardware interrupt. 1253 */ 1254 int 1255 xycintr(v) 1256 void *v; 1257 1258 { 1259 struct xyc_softc *xycsc = v; 1260 1261 /* kick the event counter */ 1262 1263 xycsc->sc_intrcnt.ev_count++; 1264 1265 /* remove as many done IOPBs as possible */ 1266 1267 xyc_remove_iorq(xycsc); 1268 1269 /* start any iorq's already waiting */ 1270 1271 xyc_start(xycsc, NULL); 1272 1273 return (1); 1274 } 1275 /* 1276 * end of interrupt function 1277 */ 1278 1279 /* 1280 * i n t e r n a l f u n c t i o n s 1281 */ 1282 1283 /* 1284 * xyc_rqinit: fill out the fields of an I/O request 1285 */ 1286 1287 inline void 1288 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1289 struct xy_iorq *rq; 1290 struct xyc_softc *xyc; 1291 struct xy_softc *xy; 1292 int md; 1293 u_long blk; 1294 int cnt; 1295 void *db; 1296 struct buf *bp; 1297 { 1298 rq->xyc = xyc; 1299 rq->xy = xy; 1300 rq->ttl = XYC_MAXTTL + 10; 1301 rq->mode = md; 1302 rq->tries = rq->errnum = rq->lasterror = 0; 1303 rq->blockno = blk; 1304 rq->sectcnt = cnt; 1305 rq->dbuf = db; 1306 rq->buf = bp; 1307 } 1308 1309 /* 1310 * xyc_rqtopb: load up an IOPB based on an iorq 1311 */ 1312 1313 void 1314 xyc_rqtopb(iorq, iopb, cmd, subfun) 1315 struct xy_iorq *iorq; 1316 struct xy_iopb *iopb; 1317 int cmd, subfun; 1318 1319 { 1320 u_long block, dp; 1321 1322 /* normal IOPB case, standard stuff */ 1323 1324 /* chain bit handled later */ 1325 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1326 iopb->com = cmd; 1327 iopb->errnum = 0; 1328 iopb->errs = 0; 1329 iopb->done = 0; 1330 if (iorq->xy) { 1331 iopb->unit = iorq->xy->xy_drive; 1332 iopb->dt = iorq->xy->drive_type; 1333 } else { 1334 iopb->unit = 0; 1335 iopb->dt = 0; 1336 } 1337 block = iorq->blockno; 1338 if (iorq->xy == NULL || block == 0) { 1339 iopb->sect = iopb->head = iopb->cyl = 0; 1340 } else { 1341 iopb->sect = block % iorq->xy->nsect; 1342 block = block / iorq->xy->nsect; 1343 iopb->head = block % iorq->xy->nhead; 1344 block = block / iorq->xy->nhead; 1345 iopb->cyl = block; 1346 } 1347 iopb->scnt = iorq->sectcnt; 1348 dp = (u_long) iorq->dbuf; 1349 if (iorq->dbuf == NULL) { 1350 iopb->dataa = 0; 1351 iopb->datar = 0; 1352 } else { 1353 iopb->dataa = (dp & 0xffff); 1354 iopb->datar = ((dp & 0xff0000) >> 16); 1355 } 1356 iopb->subfn = subfun; 1357 } 1358 1359 1360 /* 1361 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1362 */ 1363 1364 int 1365 xyc_unbusy(xyc, del) 1366 1367 struct xyc *xyc; 1368 int del; 1369 1370 { 1371 while (del-- > 0) { 1372 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1373 break; 1374 DELAY(1); 1375 } 1376 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1377 } 1378 1379 /* 1380 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1381 * note that NORM requests are handled separately. 1382 */ 1383 int 1384 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1385 struct xyc_softc *xycsc; 1386 int cmd, subfn, unit, block, scnt; 1387 char *dptr; 1388 int fullmode; 1389 1390 { 1391 int submode = XY_STATE(fullmode); 1392 struct xy_iorq *iorq = xycsc->ciorq; 1393 struct xy_iopb *iopb = xycsc->ciopb; 1394 1395 /* 1396 * is someone else using the control iopq wait for it if we can 1397 */ 1398 start: 1399 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1400 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1401 return(XY_ERR_FAIL); 1402 goto start; 1403 } 1404 1405 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1406 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1407 iorq->mode = XY_SUB_FREE; 1408 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1409 } 1410 1411 /* init iorq/iopb */ 1412 1413 xyc_rqinit(iorq, xycsc, 1414 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1415 fullmode, block, scnt, dptr, NULL); 1416 1417 /* load IOPB from iorq */ 1418 1419 xyc_rqtopb(iorq, iopb, cmd, subfn); 1420 1421 /* submit it for processing */ 1422 1423 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1424 1425 return(XY_ERR_AOK); 1426 } 1427 1428 /* 1429 * xyc_startbuf 1430 * start a buffer for running 1431 */ 1432 1433 int 1434 xyc_startbuf(xycsc, xysc, bp) 1435 struct xyc_softc *xycsc; 1436 struct xy_softc *xysc; 1437 struct buf *bp; 1438 1439 { 1440 int partno, error; 1441 struct xy_iorq *iorq; 1442 struct xy_iopb *iopb; 1443 u_long block; 1444 1445 iorq = xysc->xyrq; 1446 iopb = iorq->iopb; 1447 1448 /* get buf */ 1449 1450 if (bp == NULL) 1451 panic("xyc_startbuf null buf"); 1452 1453 partno = DISKPART(bp->b_dev); 1454 #ifdef XYC_DEBUG 1455 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1456 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1457 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1458 bp->b_bcount, bp->b_data); 1459 #endif 1460 1461 /* 1462 * load request. 1463 * 1464 * note that iorq points to the buffer as mapped into DVMA space, 1465 * where as the bp->b_data points to its non-DVMA mapping. 1466 */ 1467 1468 block = bp->b_rawblkno; 1469 1470 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1471 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1472 if (error != 0) { 1473 printf("%s: warning: cannot load DMA map\n", 1474 xycsc->sc_dev.dv_xname); 1475 return (XY_ERR_FAIL); /* XXX: need some sort of 1476 * call-back scheme here? */ 1477 } 1478 1479 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1480 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1481 ? BUS_DMASYNC_PREREAD 1482 : BUS_DMASYNC_PREWRITE); 1483 1484 /* init iorq and load iopb from it */ 1485 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1486 bp->b_bcount / XYFM_BPS, 1487 (void *)(u_long)iorq->dmamap->dm_segs[0].ds_addr, 1488 bp); 1489 1490 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1491 1492 /* Instrumentation. */ 1493 disk_busy(&xysc->sc_dk); 1494 1495 return (XY_ERR_AOK); 1496 } 1497 1498 1499 /* 1500 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1501 * if ok. if it fail returns an error code. type is XY_SUB_*. 1502 * 1503 * note: caller frees iorq in all cases except NORM 1504 * 1505 * return value: 1506 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1507 * WAIT: XY_AOK (success), <error-code> (failed) 1508 * POLL: <same as WAIT> 1509 * NOQ : <same as NORM> 1510 * 1511 * there are three sources for i/o requests: 1512 * [1] xystrategy: normal block I/O, using "struct buf" system. 1513 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1514 * [3] open/ioctl: these are I/O requests done in the context of a process, 1515 * and the process should block until they are done. 1516 * 1517 * software state is stored in the iorq structure. each iorq has an 1518 * iopb structure. the hardware understands the iopb structure. 1519 * every command must go through an iopb. a 450 handles one iopb at a 1520 * time, where as a 451 can take them in chains. [the 450 claims it 1521 * can handle chains, but is appears to be buggy...] iopb are allocated 1522 * in DVMA space at boot up time. each disk gets one iopb, and the 1523 * controller gets one (for POLL and WAIT commands). what happens if 1524 * the iopb is busy? for i/o type [1], the buffers are queued at the 1525 * "buff" layer and * picked up later by the interrupt routine. for case 1526 * [2] we can only be blocked if there is a WAIT type I/O request being 1527 * run. since this can only happen when we are crashing, we wait a sec 1528 * and then steal the IOPB. for case [3] the process can sleep 1529 * on the iorq free list until some iopbs are available. 1530 */ 1531 1532 1533 int 1534 xyc_submit_iorq(xycsc, iorq, type) 1535 struct xyc_softc *xycsc; 1536 struct xy_iorq *iorq; 1537 int type; 1538 1539 { 1540 struct xy_iopb *dmaiopb; 1541 1542 #ifdef XYC_DEBUG 1543 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1544 xycsc->sc_dev.dv_xname, iorq, type); 1545 #endif 1546 1547 /* first check and see if controller is busy */ 1548 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1549 #ifdef XYC_DEBUG 1550 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1551 #endif 1552 if (type == XY_SUB_NOQ) 1553 return (XY_ERR_FAIL); /* failed */ 1554 switch (type) { 1555 case XY_SUB_NORM: 1556 return XY_ERR_AOK; /* success */ 1557 case XY_SUB_WAIT: 1558 while (iorq->iopb->done == 0) { 1559 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1560 } 1561 return (iorq->errnum); 1562 case XY_SUB_POLL: /* steal controller */ 1563 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1564 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1565 panic("xyc_submit_iorq: stuck xyc"); 1566 printf("%s: stole controller\n", 1567 xycsc->sc_dev.dv_xname); 1568 break; 1569 default: 1570 panic("xyc_submit_iorq adding"); 1571 } 1572 } 1573 1574 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1575 if (dmaiopb == NULL) { /* nothing doing? */ 1576 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1577 return(XY_ERR_AOK); 1578 panic("xyc_submit_iorq: xyc_chain failed!"); 1579 } 1580 1581 XYC_GO(xycsc->xyc, dmaiopb); 1582 1583 /* command now running, wrap it up */ 1584 switch (type) { 1585 case XY_SUB_NORM: 1586 case XY_SUB_NOQ: 1587 return (XY_ERR_AOK); /* success */ 1588 case XY_SUB_WAIT: 1589 while (iorq->iopb->done == 0) { 1590 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1591 } 1592 return (iorq->errnum); 1593 case XY_SUB_POLL: 1594 return (xyc_piodriver(xycsc, iorq)); 1595 default: 1596 panic("xyc_submit_iorq wrap up"); 1597 } 1598 panic("xyc_submit_iorq"); 1599 return 0; /* not reached */ 1600 } 1601 1602 1603 /* 1604 * xyc_chain: build a chain. return dvma address of first element in 1605 * the chain. iorq != NULL: means we only want that item on the chain. 1606 */ 1607 1608 struct xy_iopb * 1609 xyc_chain(xycsc, iorq) 1610 struct xyc_softc *xycsc; 1611 struct xy_iorq *iorq; 1612 1613 { 1614 int togo, chain, hand; 1615 1616 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1617 1618 /* 1619 * promote control IOPB to the top 1620 */ 1621 if (iorq == NULL) { 1622 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1623 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1624 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1625 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1626 } 1627 1628 /* 1629 * special case: if iorq != NULL then we have a POLL or WAIT request. 1630 * we let these take priority and do them first. 1631 */ 1632 if (iorq) { 1633 xycsc->xy_chain[0] = iorq; 1634 iorq->iopb->chen = 0; 1635 return(iorq->dmaiopb); 1636 } 1637 1638 /* 1639 * NORM case: do round robin and maybe chain (if allowed and possible) 1640 */ 1641 chain = 0; 1642 hand = xycsc->xy_hand; 1643 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1644 1645 for (togo = XYC_MAXIOPB; togo > 0; 1646 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1647 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1648 1649 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1650 xycsc->iopbase[hand].done) 1651 continue; /* not ready-for-i/o */ 1652 1653 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1654 iopb = xycsc->xy_chain[chain]->iopb; 1655 iopb->chen = 0; 1656 if (chain != 0) { 1657 /* adding a link to a chain */ 1658 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1659 prev_iopb->chen = 1; 1660 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1661 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1662 } else { 1663 /* head of chain */ 1664 iorq = xycsc->xy_chain[chain]; 1665 } 1666 chain++; 1667 1668 /* quit if chaining dis-allowed */ 1669 if (xycsc->no_ols) 1670 break; 1671 } 1672 1673 return(iorq ? iorq->dmaiopb : NULL); 1674 } 1675 1676 /* 1677 * xyc_piodriver 1678 * 1679 * programmed i/o driver. this function takes over the computer 1680 * and drains off the polled i/o request. it returns the status of the iorq 1681 * the caller is interesting in. 1682 */ 1683 int 1684 xyc_piodriver(xycsc, iorq) 1685 struct xyc_softc *xycsc; 1686 struct xy_iorq *iorq; 1687 1688 { 1689 int nreset = 0; 1690 int retval = 0; 1691 u_long res; 1692 #ifdef XYC_DEBUG 1693 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1694 #endif 1695 1696 while (iorq->iopb->done == 0) { 1697 1698 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1699 1700 /* we expect some progress soon */ 1701 if (res == XY_ERR_FAIL && nreset >= 2) { 1702 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1703 #ifdef XYC_DEBUG 1704 printf("xyc_piodriver: timeout\n"); 1705 #endif 1706 return (XY_ERR_FAIL); 1707 } 1708 if (res == XY_ERR_FAIL) { 1709 if (xyc_reset(xycsc, 0, 1710 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1711 XY_ERR_FAIL, 1712 0) == XY_ERR_FAIL) 1713 return (XY_ERR_FAIL); /* flushes all but POLL 1714 * requests, resets */ 1715 continue; 1716 } 1717 1718 xyc_remove_iorq(xycsc); /* may resubmit request */ 1719 1720 if (iorq->iopb->done == 0) 1721 xyc_start(xycsc, iorq); 1722 } 1723 1724 /* get return value */ 1725 1726 retval = iorq->errnum; 1727 1728 #ifdef XYC_DEBUG 1729 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1730 iorq->errnum, xyc_e2str(iorq->errnum)); 1731 #endif 1732 1733 /* start up any bufs that have queued */ 1734 1735 xyc_start(xycsc, NULL); 1736 1737 return (retval); 1738 } 1739 1740 /* 1741 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1742 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1743 */ 1744 void 1745 xyc_xyreset(xycsc, xysc) 1746 struct xyc_softc *xycsc; 1747 struct xy_softc *xysc; 1748 1749 { 1750 struct xy_iopb tmpiopb; 1751 struct xy_iopb *iopb; 1752 int del; 1753 1754 iopb = xycsc->ciopb; 1755 1756 /* Save contents */ 1757 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1758 1759 iopb->chen = iopb->done = iopb->errs = 0; 1760 iopb->ien = 0; 1761 iopb->com = XYCMD_RST; 1762 iopb->unit = xysc->xy_drive; 1763 1764 XYC_GO(xycsc->xyc, xycsc->ciorq->dmaiopb); 1765 1766 del = XYC_RESETUSEC; 1767 while (del > 0) { 1768 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1769 break; 1770 DELAY(1); 1771 del--; 1772 } 1773 1774 if (del <= 0 || iopb->errs) { 1775 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1776 xyc_e2str(iopb->errnum)); 1777 del = xycsc->xyc->xyc_rsetup; 1778 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1779 panic("xyc_reset"); 1780 } else { 1781 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1782 } 1783 1784 /* Restore contents */ 1785 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1786 } 1787 1788 1789 /* 1790 * xyc_reset: reset everything: requests are marked as errors except 1791 * a polled request (which is resubmitted) 1792 */ 1793 int 1794 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1795 struct xyc_softc *xycsc; 1796 int quiet, error; 1797 struct xy_iorq *blastmode; 1798 struct xy_softc *xysc; 1799 1800 { 1801 int del = 0, lcv, retval = XY_ERR_AOK; 1802 1803 /* soft reset hardware */ 1804 1805 if (!quiet) 1806 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1807 del = xycsc->xyc->xyc_rsetup; 1808 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1809 if (del == XY_ERR_FAIL) { 1810 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1811 retval = XY_ERR_FAIL; 1812 } 1813 if (xysc) 1814 xyc_xyreset(xycsc, xysc); 1815 1816 /* fix queues based on "blast-mode" */ 1817 1818 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1819 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1820 1821 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1822 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1823 XY_STATE(iorq->mode) != XY_SUB_NORM) 1824 /* is it active? */ 1825 continue; 1826 1827 if (blastmode == XY_RSET_ALL || 1828 blastmode != iorq) { 1829 /* failed */ 1830 iorq->errnum = error; 1831 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1832 switch (XY_STATE(iorq->mode)) { 1833 case XY_SUB_NORM: 1834 iorq->buf->b_error = EIO; 1835 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1836 1837 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1838 iorq->dmamap->dm_mapsize, 1839 (iorq->buf->b_flags & B_READ) 1840 ? BUS_DMASYNC_POSTREAD 1841 : BUS_DMASYNC_POSTWRITE); 1842 1843 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1844 1845 (void)BUFQ_GET(iorq->xy->xyq); 1846 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1847 (xycsc->reqs[lcv].buf->b_bcount - 1848 xycsc->reqs[lcv].buf->b_resid), 1849 (xycsc->reqs[lcv].buf->b_flags & B_READ)); 1850 biodone(iorq->buf); 1851 iorq->mode = XY_SUB_FREE; 1852 break; 1853 case XY_SUB_WAIT: 1854 wakeup(iorq); 1855 case XY_SUB_POLL: 1856 iorq->mode = 1857 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1858 break; 1859 } 1860 1861 } else { 1862 1863 /* resubmit, no need to do anything here */ 1864 } 1865 } 1866 1867 /* 1868 * now, if stuff is waiting, start it. 1869 * since we just reset it should go 1870 */ 1871 xyc_start(xycsc, NULL); 1872 1873 return (retval); 1874 } 1875 1876 /* 1877 * xyc_start: start waiting buffers 1878 */ 1879 1880 void 1881 xyc_start(xycsc, iorq) 1882 struct xyc_softc *xycsc; 1883 struct xy_iorq *iorq; 1884 1885 { 1886 int lcv; 1887 struct xy_softc *xy; 1888 1889 if (iorq == NULL) { 1890 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1891 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1892 if (BUFQ_PEEK(xy->xyq) == NULL) continue; 1893 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1894 xyc_startbuf(xycsc, xy, BUFQ_PEEK(xy->xyq)); 1895 } 1896 } 1897 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1898 } 1899 1900 /* 1901 * xyc_remove_iorq: remove "done" IOPB's. 1902 */ 1903 1904 int 1905 xyc_remove_iorq(xycsc) 1906 struct xyc_softc *xycsc; 1907 1908 { 1909 int errnum, rq, comm, errs; 1910 struct xyc *xyc = xycsc->xyc; 1911 u_long addr; 1912 struct xy_iopb *iopb; 1913 struct xy_iorq *iorq; 1914 struct buf *bp; 1915 1916 if (xyc->xyc_csr & XYC_DERR) { 1917 /* 1918 * DOUBLE ERROR: should never happen under normal use. This 1919 * error is so bad, you can't even tell which IOPB is bad, so 1920 * we dump them all. 1921 */ 1922 errnum = XY_ERR_DERR; 1923 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1924 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errnum, 0) != XY_ERR_AOK) { 1925 printf("%s: soft reset failed!\n", 1926 xycsc->sc_dev.dv_xname); 1927 panic("xyc_remove_iorq: controller DEAD"); 1928 } 1929 return (XY_ERR_AOK); 1930 } 1931 1932 /* 1933 * get iopb that is done, loop down the chain 1934 */ 1935 1936 if (xyc->xyc_csr & XYC_ERR) { 1937 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1938 } 1939 if (xyc->xyc_csr & XYC_IPND) { 1940 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1941 } 1942 1943 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1944 iorq = xycsc->xy_chain[rq]; 1945 if (iorq == NULL) break; /* done ! */ 1946 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1947 continue; /* free, or done */ 1948 iopb = iorq->iopb; 1949 if (iopb->done == 0) 1950 continue; /* not done yet */ 1951 1952 comm = iopb->com; 1953 errs = iopb->errs; 1954 1955 if (errs) 1956 iorq->errnum = iopb->errnum; 1957 else 1958 iorq->errnum = 0; 1959 1960 /* handle non-fatal errors */ 1961 1962 if (errs && 1963 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1964 continue; /* AOK: we resubmitted it */ 1965 1966 1967 /* this iorq is now done (hasn't been restarted or anything) */ 1968 1969 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1970 xyc_perror(iorq, iopb, 0); 1971 1972 /* now, if read/write check to make sure we got all the data 1973 * we needed. (this may not be the case if we got an error in 1974 * the middle of a multisector request). */ 1975 1976 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1977 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1978 /* we just successfully processed a bad144 sector 1979 * note: if we are in bad 144 mode, the pointers have 1980 * been advanced already (see above) and are pointing 1981 * at the bad144 sector. to exit bad144 mode, we 1982 * must advance the pointers 1 sector and issue a new 1983 * request if there are still sectors left to process 1984 * 1985 */ 1986 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1987 1988 /* exit b144 mode */ 1989 iorq->mode = iorq->mode & (~XY_MODE_B144); 1990 1991 if (iorq->sectcnt) { /* more to go! */ 1992 iorq->lasterror = iorq->errnum = iopb->errnum = 0; 1993 iopb->errs = iopb->done = 0; 1994 iorq->tries = 0; 1995 iopb->scnt = iorq->sectcnt; 1996 iopb->cyl = iorq->blockno / 1997 iorq->xy->sectpercyl; 1998 iopb->head = 1999 (iorq->blockno / iorq->xy->nhead) % 2000 iorq->xy->nhead; 2001 iopb->sect = iorq->blockno % XYFM_BPS; 2002 addr = (u_long) iorq->dbuf; 2003 iopb->dataa = (addr & 0xffff); 2004 iopb->datar = ((addr & 0xff0000) >> 16); 2005 /* will resubit at end */ 2006 continue; 2007 } 2008 } 2009 /* final cleanup, totally done with this request */ 2010 2011 switch (XY_STATE(iorq->mode)) { 2012 case XY_SUB_NORM: 2013 bp = iorq->buf; 2014 if (errs) { 2015 bp->b_error = EIO; 2016 bp->b_resid = iorq->sectcnt * XYFM_BPS; 2017 } else { 2018 bp->b_resid = 0; /* done */ 2019 } 2020 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 2021 iorq->dmamap->dm_mapsize, 2022 (iorq->buf->b_flags & B_READ) 2023 ? BUS_DMASYNC_POSTREAD 2024 : BUS_DMASYNC_POSTWRITE); 2025 2026 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 2027 2028 (void)BUFQ_GET(iorq->xy->xyq); 2029 disk_unbusy(&iorq->xy->sc_dk, 2030 (bp->b_bcount - bp->b_resid), 2031 (bp->b_flags & B_READ)); 2032 iorq->mode = XY_SUB_FREE; 2033 biodone(bp); 2034 break; 2035 case XY_SUB_WAIT: 2036 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2037 wakeup(iorq); 2038 break; 2039 case XY_SUB_POLL: 2040 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2041 break; 2042 } 2043 } 2044 2045 return (XY_ERR_AOK); 2046 } 2047 2048 /* 2049 * xyc_perror: print error. 2050 * - if still_trying is true: we got an error, retried and got a 2051 * different error. in that case lasterror is the old error, 2052 * and errnum is the new one. 2053 * - if still_trying is not true, then if we ever had an error it 2054 * is in lasterror. also, if iorq->errnum == 0, then we recovered 2055 * from that error (otherwise iorq->errnum == iorq->lasterror). 2056 */ 2057 void 2058 xyc_perror(iorq, iopb, still_trying) 2059 struct xy_iorq *iorq; 2060 struct xy_iopb *iopb; 2061 int still_trying; 2062 2063 { 2064 2065 int error = iorq->lasterror; 2066 2067 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 2068 : iorq->xyc->sc_dev.dv_xname); 2069 if (iorq->buf) 2070 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2071 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2072 printf("%s %d/%d/%d: ", 2073 (iopb->com == XYCMD_RD) ? "read" : "write", 2074 iopb->cyl, iopb->head, iopb->sect); 2075 printf("%s", xyc_e2str(error)); 2076 2077 if (still_trying) 2078 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errnum)); 2079 else 2080 if (iorq->errnum == 0) 2081 printf(" [recovered in %d tries]", iorq->tries); 2082 2083 printf("\n"); 2084 } 2085 2086 /* 2087 * xyc_error: non-fatal error encountered... recover. 2088 * return AOK if resubmitted, return FAIL if this iopb is done 2089 */ 2090 int 2091 xyc_error(xycsc, iorq, iopb, comm) 2092 struct xyc_softc *xycsc; 2093 struct xy_iorq *iorq; 2094 struct xy_iopb *iopb; 2095 int comm; 2096 2097 { 2098 int errnum = iorq->errnum; 2099 int erract = xyc_entoact(errnum); 2100 int oldmode, advance; 2101 #ifdef __sparc__ 2102 int i; 2103 #endif 2104 2105 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2106 oldmode = iorq->mode; 2107 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2108 /* make xyc_start ignore us */ 2109 xyc_reset(xycsc, 1, XY_RSET_NONE, errnum, iorq->xy); 2110 iorq->mode = oldmode; 2111 } 2112 /* check for read/write to a sector in bad144 table if bad: redirect 2113 * request to bad144 area */ 2114 2115 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2116 (iorq->mode & XY_MODE_B144) == 0) { 2117 advance = iorq->sectcnt - iopb->scnt; 2118 XYC_ADVANCE(iorq, advance); 2119 #ifdef __sparc__ 2120 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2121 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2122 iorq->blockno % iorq->xy->nsect)) != -1) { 2123 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2124 * redirect */ 2125 iopb->errnum = iopb->done = iopb->errs = 0; 2126 iopb->scnt = 1; 2127 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2128 /* second to last acyl */ 2129 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2130 * standard */ 2131 iopb->head = i / iorq->xy->nhead; 2132 iopb->sect = i % iorq->xy->nhead; 2133 /* will resubmit when we come out of remove_iorq */ 2134 return (XY_ERR_AOK); /* recovered! */ 2135 } 2136 #endif 2137 } 2138 2139 /* 2140 * it isn't a bad144 sector, must be real error! see if we can retry 2141 * it? 2142 */ 2143 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2144 xyc_perror(iorq, iopb, 1); /* inform of error state 2145 * change */ 2146 iorq->lasterror = errnum; 2147 2148 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2149 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2150 iorq->tries++; 2151 iorq->errnum = iopb->errnum = iopb->done = iopb->errs = 0; 2152 /* will resubmit at end of remove_iorq */ 2153 return (XY_ERR_AOK); /* recovered! */ 2154 } 2155 2156 /* failed to recover from this error */ 2157 return (XY_ERR_FAIL); 2158 } 2159 2160 /* 2161 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2162 */ 2163 void 2164 xyc_tick(arg) 2165 void *arg; 2166 2167 { 2168 struct xyc_softc *xycsc = arg; 2169 int lcv, s, reset = 0; 2170 2171 /* reduce ttl for each request if one goes to zero, reset xyc */ 2172 s = splbio(); 2173 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2174 if (xycsc->reqs[lcv].mode == 0 || 2175 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2176 continue; 2177 xycsc->reqs[lcv].ttl--; 2178 if (xycsc->reqs[lcv].ttl == 0) 2179 reset = 1; 2180 } 2181 if (reset) { 2182 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2183 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2184 } 2185 splx(s); 2186 2187 /* until next time */ 2188 2189 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2190 } 2191 2192 /* 2193 * xyc_ioctlcmd: this function provides a user level interface to the 2194 * controller via ioctl. this allows "format" programs to be written 2195 * in user code, and is also useful for some debugging. we return 2196 * an error code. called at user priority. 2197 * 2198 * XXX missing a few commands (see the 7053 driver for ideas) 2199 */ 2200 int 2201 xyc_ioctlcmd(xy, dev, xio) 2202 struct xy_softc *xy; 2203 dev_t dev; 2204 struct xd_iocmd *xio; 2205 2206 { 2207 int s, rqno, dummy = 0; 2208 char *dvmabuf = NULL, *buf = NULL; 2209 struct xyc_softc *xycsc; 2210 int rseg, error; 2211 bus_dma_segment_t seg; 2212 2213 /* check sanity of requested command */ 2214 2215 switch (xio->cmd) { 2216 2217 case XYCMD_NOP: /* no op: everything should be zero */ 2218 if (xio->subfn || xio->dptr || xio->dlen || 2219 xio->block || xio->sectcnt) 2220 return (EINVAL); 2221 break; 2222 2223 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2224 case XYCMD_WR: 2225 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2226 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2227 return (EINVAL); 2228 break; 2229 2230 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2231 return (EINVAL); 2232 2233 break; 2234 2235 default: 2236 return (EINVAL);/* ??? */ 2237 } 2238 2239 xycsc = xy->parent; 2240 2241 /* create DVMA buffer for request if needed */ 2242 if (xio->dlen) { 2243 bus_addr_t busbuf; 2244 2245 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2246 &seg, &rseg, 2247 xio->dlen, (void **)&buf, 2248 &busbuf)) != 0) { 2249 return (error); 2250 } 2251 dvmabuf = (void *)(u_long)BUS_ADDR_PADDR(busbuf); 2252 2253 if (xio->cmd == XYCMD_WR) { 2254 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2255 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2256 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2257 return (error); 2258 } 2259 } 2260 } 2261 /* do it! */ 2262 2263 error = 0; 2264 s = splbio(); 2265 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2266 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2267 if (rqno == XY_ERR_FAIL) { 2268 error = EIO; 2269 goto done; 2270 } 2271 xio->errnum = xycsc->ciorq->errnum; 2272 xio->tries = xycsc->ciorq->tries; 2273 XYC_DONE(xycsc, dummy); 2274 2275 if (xio->cmd == XYCMD_RD) 2276 error = copyout(buf, xio->dptr, xio->dlen); 2277 2278 done: 2279 splx(s); 2280 if (dvmabuf) { 2281 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2282 xio->dlen, buf); 2283 } 2284 return (error); 2285 } 2286 2287 /* 2288 * xyc_e2str: convert error code number into an error string 2289 */ 2290 const char * 2291 xyc_e2str(no) 2292 int no; 2293 { 2294 switch (no) { 2295 case XY_ERR_FAIL: 2296 return ("Software fatal error"); 2297 case XY_ERR_DERR: 2298 return ("DOUBLE ERROR"); 2299 case XY_ERR_AOK: 2300 return ("Successful completion"); 2301 case XY_ERR_IPEN: 2302 return("Interrupt pending"); 2303 case XY_ERR_BCFL: 2304 return("Busy conflict"); 2305 case XY_ERR_TIMO: 2306 return("Operation timeout"); 2307 case XY_ERR_NHDR: 2308 return("Header not found"); 2309 case XY_ERR_HARD: 2310 return("Hard ECC error"); 2311 case XY_ERR_ICYL: 2312 return("Illegal cylinder address"); 2313 case XY_ERR_ISEC: 2314 return("Illegal sector address"); 2315 case XY_ERR_SMAL: 2316 return("Last sector too small"); 2317 case XY_ERR_SACK: 2318 return("Slave ACK error (non-existent memory)"); 2319 case XY_ERR_CHER: 2320 return("Cylinder and head/header error"); 2321 case XY_ERR_SRTR: 2322 return("Auto-seek retry successful"); 2323 case XY_ERR_WPRO: 2324 return("Write-protect error"); 2325 case XY_ERR_UIMP: 2326 return("Unimplemented command"); 2327 case XY_ERR_DNRY: 2328 return("Drive not ready"); 2329 case XY_ERR_SZER: 2330 return("Sector count zero"); 2331 case XY_ERR_DFLT: 2332 return("Drive faulted"); 2333 case XY_ERR_ISSZ: 2334 return("Illegal sector size"); 2335 case XY_ERR_SLTA: 2336 return("Self test A"); 2337 case XY_ERR_SLTB: 2338 return("Self test B"); 2339 case XY_ERR_SLTC: 2340 return("Self test C"); 2341 case XY_ERR_SOFT: 2342 return("Soft ECC error"); 2343 case XY_ERR_SFOK: 2344 return("Soft ECC error recovered"); 2345 case XY_ERR_IHED: 2346 return("Illegal head"); 2347 case XY_ERR_DSEQ: 2348 return("Disk sequencer error"); 2349 case XY_ERR_SEEK: 2350 return("Seek error"); 2351 default: 2352 return ("Unknown error"); 2353 } 2354 } 2355 2356 int 2357 xyc_entoact(errnum) 2358 2359 int errnum; 2360 2361 { 2362 switch (errnum) { 2363 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2364 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2365 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2366 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2367 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2368 2369 return(XY_ERA_PROG); /* program error ! */ 2370 2371 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2372 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2373 case XY_ERR_SOFT: 2374 2375 return(XY_ERA_HARD); /* hard error, retry */ 2376 2377 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2378 2379 return(XY_ERA_RSET); /* hard error reset */ 2380 2381 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2382 2383 return(XY_ERA_SOFT); /* an FYI error */ 2384 2385 case XY_ERR_WPRO: 2386 2387 return(XY_ERA_WPRO); /* write protect */ 2388 } 2389 2390 return(XY_ERA_PROG); /* ??? */ 2391 } 2392