xy.c revision 1.79
1 /* $NetBSD: xy.c,v 1.79 2008/04/05 16:06:12 cegger 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 1.79 2008/04/05 16:06:12 cegger 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_oflags |= BO_DONE; 251 bp->b_cflags &= ~BC_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", device_xname(&xy->sc_dev), 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 device_xname(&xy->sc_dev)); 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 device_xname(&xy->sc_dev), 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 aprint_error_dev(&xyc->sc_dev, "DMA buffer map create error %d\n", 467 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 aprint_error_dev(&xyc->sc_dev, "DMA buffer map create error %d\n", 485 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 aprint_error_dev(&xyc->sc_dev, "DMA buffer alloc error %d\n", 495 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 aprint_error_dev(&xyc->sc_dev, "DMA buffer map create error %d\n", 537 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 aprint_error_dev(&xyc->sc_dev, "error: %s\n", 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 device_xname(&xyc->sc_dev)); 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 device_xname(&xyc->sc_dev), "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 device_xname(&xy->sc_dev), device_xname(&xy->parent->sc_dev)); 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 aprint_error_dev(&xyc->sc_dev, "DMA buffer alloc error %d\n", 688 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 aprint_error_dev(&xy->sc_dev, "\n%s: reading disk label failed: %s\n", 730 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, device_xname(&xy->sc_dev), &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", device_xname(&xy->sc_dev), 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 device_xname(&xy->sc_dev), 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 device_xname(&xyc->sc_dev), device_xname(&xy->sc_dev), 772 device_xname(&oxy->sc_dev)); 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 aprint_error_dev(&xy->sc_dev, "write drive size failed: %s\n", 787 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 aprint_error_dev(&xy->sc_dev, "reading bad144 failed: %s\n", 805 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 aprint_error_dev(&xy->sc_dev, "warning: invalid bad144 sector!\n"); 825 } else { 826 bcopy(buf, &xy->dkb, XYFM_BPS); 827 } 828 829 done: 830 if (buf != NULL) { 831 xy_dmamem_free(xyc->dmatag, xyc->auxmap, 832 &seg, rseg, XYFM_BPS, buf); 833 } 834 835 xy->state = newstate; 836 if (!xa->booting) { 837 wakeup(&xy->state); 838 splx(s); 839 } 840 } 841 842 /* 843 * end of autoconfig functions 844 */ 845 846 /* 847 * { b , c } d e v s w f u n c t i o n s 848 */ 849 850 /* 851 * xyclose: close device 852 */ 853 int 854 xyclose(dev, flag, fmt, l) 855 dev_t dev; 856 int flag, fmt; 857 struct lwp *l; 858 859 { 860 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 861 int part = DISKPART(dev); 862 863 /* clear mask bits */ 864 865 switch (fmt) { 866 case S_IFCHR: 867 xy->sc_dk.dk_copenmask &= ~(1 << part); 868 break; 869 case S_IFBLK: 870 xy->sc_dk.dk_bopenmask &= ~(1 << part); 871 break; 872 } 873 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 874 875 return 0; 876 } 877 878 /* 879 * xydump: crash dump system 880 */ 881 int 882 xydump(dev, blkno, va, size) 883 dev_t dev; 884 daddr_t blkno; 885 void *va; 886 size_t size; 887 { 888 int unit, part; 889 struct xy_softc *xy; 890 891 unit = DISKUNIT(dev); 892 if (unit >= xy_cd.cd_ndevs) 893 return ENXIO; 894 part = DISKPART(dev); 895 896 xy = xy_cd.cd_devs[unit]; 897 898 printf("%s%c: crash dump not supported (yet)\n", device_xname(&xy->sc_dev), 899 'a' + part); 900 901 return ENXIO; 902 903 /* outline: globals: "dumplo" == sector number of partition to start 904 * dump at (convert to physical sector with partition table) 905 * "dumpsize" == size of dump in clicks "physmem" == size of physical 906 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 907 * physmem) 908 * 909 * dump a copy of physical memory to the dump device starting at sector 910 * "dumplo" in the swap partition (make sure > 0). map in pages as 911 * we go. use polled I/O. 912 * 913 * XXX how to handle NON_CONTIG? */ 914 915 } 916 917 static enum kauth_device_req 918 xy_getkauthreq(u_char cmd) 919 { 920 enum kauth_device_req req; 921 922 switch (cmd) { 923 case XYCMD_WR: 924 case XYCMD_WTH: 925 case XYCMD_WFM: 926 case XYCMD_WRH: 927 req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_WRITE; 928 break; 929 930 case XYCMD_RD: 931 case XYCMD_RTH: 932 case XYCMD_RDH: 933 req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READ; 934 break; 935 936 case XYCMD_RDS: 937 case XYCMD_MBD: 938 req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READCONF; 939 break; 940 941 case XYCMD_RST: 942 case XYCMD_SDS: 943 case XYCMD_MBL: 944 req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_WRITECONF; 945 break; 946 947 case XYCMD_NOP: 948 case XYCMD_SK: 949 case XYCMD_ST: 950 case XYCMD_R: 951 default: 952 req = 0; 953 break; 954 } 955 956 return (req); 957 } 958 959 /* 960 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 961 */ 962 int 963 xyioctl(dev, command, addr, flag, l) 964 dev_t dev; 965 u_long command; 966 void *addr; 967 int flag; 968 struct lwp *l; 969 970 { 971 struct xy_softc *xy; 972 struct xd_iocmd *xio; 973 int error, s, unit; 974 #ifdef __HAVE_OLD_DISKLABEL 975 struct disklabel newlabel; 976 #endif 977 struct disklabel *lp; 978 979 unit = DISKUNIT(dev); 980 981 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 982 return (ENXIO); 983 984 /* switch on ioctl type */ 985 986 switch (command) { 987 case DIOCSBAD: /* set bad144 info */ 988 if ((flag & FWRITE) == 0) 989 return EBADF; 990 s = splbio(); 991 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 992 splx(s); 993 return 0; 994 995 case DIOCGDINFO: /* get disk label */ 996 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 997 return 0; 998 #ifdef __HAVE_OLD_DISKLABEL 999 case ODIOCGDINFO: 1000 newlabel = *(xy->sc_dk.dk_label); 1001 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 1002 return ENOTTY; 1003 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 1004 return 0; 1005 #endif 1006 1007 case DIOCGPART: /* get partition info */ 1008 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 1009 ((struct partinfo *) addr)->part = 1010 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 1011 return 0; 1012 1013 case DIOCSDINFO: /* set disk label */ 1014 #ifdef __HAVE_OLD_DISKLABEL 1015 case ODIOCSDINFO: 1016 if (command == ODIOCSDINFO) { 1017 memset(&newlabel, 0, sizeof newlabel); 1018 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 1019 lp = &newlabel; 1020 } else 1021 #endif 1022 lp = (struct disklabel *)addr; 1023 1024 if ((flag & FWRITE) == 0) 1025 return EBADF; 1026 error = setdisklabel(xy->sc_dk.dk_label, 1027 lp, /* xy->sc_dk.dk_openmask : */ 0, 1028 xy->sc_dk.dk_cpulabel); 1029 if (error == 0) { 1030 if (xy->state == XY_DRIVE_NOLABEL) 1031 xy->state = XY_DRIVE_ONLINE; 1032 } 1033 return error; 1034 1035 case DIOCWLABEL: /* change write status of disk label */ 1036 if ((flag & FWRITE) == 0) 1037 return EBADF; 1038 if (*(int *) addr) 1039 xy->flags |= XY_WLABEL; 1040 else 1041 xy->flags &= ~XY_WLABEL; 1042 return 0; 1043 1044 case DIOCWDINFO: /* write disk label */ 1045 #ifdef __HAVE_OLD_DISKLABEL 1046 case ODIOCWDINFO: 1047 if (command == ODIOCWDINFO) { 1048 memset(&newlabel, 0, sizeof newlabel); 1049 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 1050 lp = &newlabel; 1051 } else 1052 #endif 1053 lp = (struct disklabel *)addr; 1054 1055 if ((flag & FWRITE) == 0) 1056 return EBADF; 1057 error = setdisklabel(xy->sc_dk.dk_label, 1058 lp, /* xy->sc_dk.dk_openmask : */ 0, 1059 xy->sc_dk.dk_cpulabel); 1060 if (error == 0) { 1061 if (xy->state == XY_DRIVE_NOLABEL) 1062 xy->state = XY_DRIVE_ONLINE; 1063 1064 /* Simulate opening partition 0 so write succeeds. */ 1065 xy->sc_dk.dk_openmask |= (1 << 0); 1066 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 1067 xystrategy, xy->sc_dk.dk_label, 1068 xy->sc_dk.dk_cpulabel); 1069 xy->sc_dk.dk_openmask = 1070 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1071 } 1072 return error; 1073 1074 case DIOSXDCMD: { 1075 enum kauth_device_req req; 1076 1077 xio = (struct xd_iocmd *) addr; 1078 req = xy_getkauthreq(xio->cmd); 1079 if ((error = kauth_authorize_device_passthru(l->l_cred, 1080 dev, req, xio)) != 0) 1081 return (error); 1082 return (xyc_ioctlcmd(xy, dev, xio)); 1083 } 1084 1085 default: 1086 return ENOTTY; 1087 } 1088 } 1089 1090 /* 1091 * xyopen: open drive 1092 */ 1093 1094 int 1095 xyopen(dev, flag, fmt, l) 1096 dev_t dev; 1097 int flag, fmt; 1098 struct lwp *l; 1099 { 1100 int unit, part; 1101 struct xy_softc *xy; 1102 struct xyc_attach_args xa; 1103 1104 /* first, could it be a valid target? */ 1105 1106 unit = DISKUNIT(dev); 1107 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 1108 return (ENXIO); 1109 part = DISKPART(dev); 1110 1111 /* do we need to attach the drive? */ 1112 1113 if (xy->state == XY_DRIVE_UNKNOWN) { 1114 xa.driveno = xy->xy_drive; 1115 xa.fullmode = XY_SUB_WAIT; 1116 xa.booting = 0; 1117 xyattach((struct device *) xy->parent, 1118 (struct device *) xy, &xa); 1119 if (xy->state == XY_DRIVE_UNKNOWN) { 1120 return (EIO); 1121 } 1122 } 1123 /* check for partition */ 1124 1125 if (part != RAW_PART && 1126 (part >= xy->sc_dk.dk_label->d_npartitions || 1127 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1128 return (ENXIO); 1129 } 1130 /* set open masks */ 1131 1132 switch (fmt) { 1133 case S_IFCHR: 1134 xy->sc_dk.dk_copenmask |= (1 << part); 1135 break; 1136 case S_IFBLK: 1137 xy->sc_dk.dk_bopenmask |= (1 << part); 1138 break; 1139 } 1140 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1141 1142 return 0; 1143 } 1144 1145 int 1146 xyread(dev, uio, flags) 1147 dev_t dev; 1148 struct uio *uio; 1149 int flags; 1150 { 1151 1152 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1153 } 1154 1155 int 1156 xywrite(dev, uio, flags) 1157 dev_t dev; 1158 struct uio *uio; 1159 int flags; 1160 { 1161 1162 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1163 } 1164 1165 1166 /* 1167 * xysize: return size of a partition for a dump 1168 */ 1169 1170 int 1171 xysize(dev) 1172 dev_t dev; 1173 1174 { 1175 struct xy_softc *xysc; 1176 int unit, part, size, omask; 1177 1178 /* valid unit? */ 1179 unit = DISKUNIT(dev); 1180 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1181 return (-1); 1182 1183 part = DISKPART(dev); 1184 omask = xysc->sc_dk.dk_openmask & (1 << part); 1185 1186 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1187 return (-1); 1188 1189 /* do it */ 1190 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1191 size = -1; /* only give valid size for swap partitions */ 1192 else 1193 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1194 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1195 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1196 return (-1); 1197 return (size); 1198 } 1199 1200 /* 1201 * xystrategy: buffering system interface to xy. 1202 */ 1203 1204 void 1205 xystrategy(bp) 1206 struct buf *bp; 1207 1208 { 1209 struct xy_softc *xy; 1210 int s, unit; 1211 struct xyc_attach_args xa; 1212 struct disklabel *lp; 1213 daddr_t blkno; 1214 1215 unit = DISKUNIT(bp->b_dev); 1216 1217 /* check for live device */ 1218 1219 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1220 bp->b_blkno < 0 || 1221 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1222 bp->b_error = EINVAL; 1223 goto done; 1224 } 1225 /* do we need to attach the drive? */ 1226 1227 if (xy->state == XY_DRIVE_UNKNOWN) { 1228 xa.driveno = xy->xy_drive; 1229 xa.fullmode = XY_SUB_WAIT; 1230 xa.booting = 0; 1231 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1232 if (xy->state == XY_DRIVE_UNKNOWN) { 1233 bp->b_error = EIO; 1234 goto done; 1235 } 1236 } 1237 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1238 /* no I/O to unlabeled disks, unless raw partition */ 1239 bp->b_error = EIO; 1240 goto done; 1241 } 1242 /* short circuit zero length request */ 1243 1244 if (bp->b_bcount == 0) 1245 goto done; 1246 1247 /* check bounds with label (disksubr.c). Determine the size of the 1248 * transfer, and make sure it is within the boundaries of the 1249 * partition. Adjust transfer if needed, and signal errors or early 1250 * completion. */ 1251 1252 lp = xy->sc_dk.dk_label; 1253 1254 if (bounds_check_with_label(&xy->sc_dk, bp, 1255 (xy->flags & XY_WLABEL) != 0) <= 0) 1256 goto done; 1257 1258 /* 1259 * Now convert the block number to absolute and put it in 1260 * terms of the device's logical block size. 1261 */ 1262 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1263 if (DISKPART(bp->b_dev) != RAW_PART) 1264 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1265 1266 bp->b_rawblkno = blkno; 1267 1268 /* 1269 * now we know we have a valid buf structure that we need to do I/O 1270 * on. 1271 */ 1272 s = splbio(); /* protect the queues */ 1273 1274 BUFQ_PUT(xy->xyq, bp); 1275 1276 /* start 'em up */ 1277 1278 xyc_start(xy->parent, NULL); 1279 1280 /* done! */ 1281 1282 splx(s); 1283 return; 1284 1285 done: /* tells upper layers we are done with this 1286 * buf */ 1287 bp->b_resid = bp->b_bcount; 1288 biodone(bp); 1289 } 1290 /* 1291 * end of {b,c}devsw functions 1292 */ 1293 1294 /* 1295 * i n t e r r u p t f u n c t i o n 1296 * 1297 * xycintr: hardware interrupt. 1298 */ 1299 int 1300 xycintr(v) 1301 void *v; 1302 1303 { 1304 struct xyc_softc *xycsc = v; 1305 1306 /* kick the event counter */ 1307 1308 xycsc->sc_intrcnt.ev_count++; 1309 1310 /* remove as many done IOPBs as possible */ 1311 1312 xyc_remove_iorq(xycsc); 1313 1314 /* start any iorq's already waiting */ 1315 1316 xyc_start(xycsc, NULL); 1317 1318 return (1); 1319 } 1320 /* 1321 * end of interrupt function 1322 */ 1323 1324 /* 1325 * i n t e r n a l f u n c t i o n s 1326 */ 1327 1328 /* 1329 * xyc_rqinit: fill out the fields of an I/O request 1330 */ 1331 1332 inline void 1333 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1334 struct xy_iorq *rq; 1335 struct xyc_softc *xyc; 1336 struct xy_softc *xy; 1337 int md; 1338 u_long blk; 1339 int cnt; 1340 void *db; 1341 struct buf *bp; 1342 { 1343 rq->xyc = xyc; 1344 rq->xy = xy; 1345 rq->ttl = XYC_MAXTTL + 10; 1346 rq->mode = md; 1347 rq->tries = rq->errnum = rq->lasterror = 0; 1348 rq->blockno = blk; 1349 rq->sectcnt = cnt; 1350 rq->dbuf = db; 1351 rq->buf = bp; 1352 } 1353 1354 /* 1355 * xyc_rqtopb: load up an IOPB based on an iorq 1356 */ 1357 1358 void 1359 xyc_rqtopb(iorq, iopb, cmd, subfun) 1360 struct xy_iorq *iorq; 1361 struct xy_iopb *iopb; 1362 int cmd, subfun; 1363 1364 { 1365 u_long block, dp; 1366 1367 /* normal IOPB case, standard stuff */ 1368 1369 /* chain bit handled later */ 1370 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1371 iopb->com = cmd; 1372 iopb->errnum = 0; 1373 iopb->errs = 0; 1374 iopb->done = 0; 1375 if (iorq->xy) { 1376 iopb->unit = iorq->xy->xy_drive; 1377 iopb->dt = iorq->xy->drive_type; 1378 } else { 1379 iopb->unit = 0; 1380 iopb->dt = 0; 1381 } 1382 block = iorq->blockno; 1383 if (iorq->xy == NULL || block == 0) { 1384 iopb->sect = iopb->head = iopb->cyl = 0; 1385 } else { 1386 iopb->sect = block % iorq->xy->nsect; 1387 block = block / iorq->xy->nsect; 1388 iopb->head = block % iorq->xy->nhead; 1389 block = block / iorq->xy->nhead; 1390 iopb->cyl = block; 1391 } 1392 iopb->scnt = iorq->sectcnt; 1393 dp = (u_long) iorq->dbuf; 1394 if (iorq->dbuf == NULL) { 1395 iopb->dataa = 0; 1396 iopb->datar = 0; 1397 } else { 1398 iopb->dataa = (dp & 0xffff); 1399 iopb->datar = ((dp & 0xff0000) >> 16); 1400 } 1401 iopb->subfn = subfun; 1402 } 1403 1404 1405 /* 1406 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1407 */ 1408 1409 int 1410 xyc_unbusy(xyc, del) 1411 1412 struct xyc *xyc; 1413 int del; 1414 1415 { 1416 while (del-- > 0) { 1417 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1418 break; 1419 DELAY(1); 1420 } 1421 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1422 } 1423 1424 /* 1425 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1426 * note that NORM requests are handled separately. 1427 */ 1428 int 1429 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1430 struct xyc_softc *xycsc; 1431 int cmd, subfn, unit, block, scnt; 1432 char *dptr; 1433 int fullmode; 1434 1435 { 1436 int submode = XY_STATE(fullmode); 1437 struct xy_iorq *iorq = xycsc->ciorq; 1438 struct xy_iopb *iopb = xycsc->ciopb; 1439 1440 /* 1441 * is someone else using the control iopq wait for it if we can 1442 */ 1443 start: 1444 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1445 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1446 return(XY_ERR_FAIL); 1447 goto start; 1448 } 1449 1450 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1451 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1452 iorq->mode = XY_SUB_FREE; 1453 printf("%s: stole control iopb\n", device_xname(&xycsc->sc_dev)); 1454 } 1455 1456 /* init iorq/iopb */ 1457 1458 xyc_rqinit(iorq, xycsc, 1459 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1460 fullmode, block, scnt, dptr, NULL); 1461 1462 /* load IOPB from iorq */ 1463 1464 xyc_rqtopb(iorq, iopb, cmd, subfn); 1465 1466 /* submit it for processing */ 1467 1468 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1469 1470 return(XY_ERR_AOK); 1471 } 1472 1473 /* 1474 * xyc_startbuf 1475 * start a buffer for running 1476 */ 1477 1478 int 1479 xyc_startbuf(xycsc, xysc, bp) 1480 struct xyc_softc *xycsc; 1481 struct xy_softc *xysc; 1482 struct buf *bp; 1483 1484 { 1485 int partno, error; 1486 struct xy_iorq *iorq; 1487 struct xy_iopb *iopb; 1488 u_long block; 1489 1490 iorq = xysc->xyrq; 1491 iopb = iorq->iopb; 1492 1493 /* get buf */ 1494 1495 if (bp == NULL) 1496 panic("xyc_startbuf null buf"); 1497 1498 partno = DISKPART(bp->b_dev); 1499 #ifdef XYC_DEBUG 1500 printf("xyc_startbuf: %s%c: %s block %d\n", device_xname(&xysc->sc_dev), 1501 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1502 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1503 bp->b_bcount, bp->b_data); 1504 #endif 1505 1506 /* 1507 * load request. 1508 * 1509 * note that iorq points to the buffer as mapped into DVMA space, 1510 * where as the bp->b_data points to its non-DVMA mapping. 1511 */ 1512 1513 block = bp->b_rawblkno; 1514 1515 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1516 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1517 if (error != 0) { 1518 aprint_error_dev(&sycsc->sc_dev, "warning: cannot load DMA map\n"); 1519 return (XY_ERR_FAIL); /* XXX: need some sort of 1520 * call-back scheme here? */ 1521 } 1522 1523 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1524 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1525 ? BUS_DMASYNC_PREREAD 1526 : BUS_DMASYNC_PREWRITE); 1527 1528 /* init iorq and load iopb from it */ 1529 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1530 bp->b_bcount / XYFM_BPS, 1531 (void *)(u_long)iorq->dmamap->dm_segs[0].ds_addr, 1532 bp); 1533 1534 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1535 1536 /* Instrumentation. */ 1537 disk_busy(&xysc->sc_dk); 1538 1539 return (XY_ERR_AOK); 1540 } 1541 1542 1543 /* 1544 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1545 * if ok. if it fail returns an error code. type is XY_SUB_*. 1546 * 1547 * note: caller frees iorq in all cases except NORM 1548 * 1549 * return value: 1550 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1551 * WAIT: XY_AOK (success), <error-code> (failed) 1552 * POLL: <same as WAIT> 1553 * NOQ : <same as NORM> 1554 * 1555 * there are three sources for i/o requests: 1556 * [1] xystrategy: normal block I/O, using "struct buf" system. 1557 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1558 * [3] open/ioctl: these are I/O requests done in the context of a process, 1559 * and the process should block until they are done. 1560 * 1561 * software state is stored in the iorq structure. each iorq has an 1562 * iopb structure. the hardware understands the iopb structure. 1563 * every command must go through an iopb. a 450 handles one iopb at a 1564 * time, where as a 451 can take them in chains. [the 450 claims it 1565 * can handle chains, but is appears to be buggy...] iopb are allocated 1566 * in DVMA space at boot up time. each disk gets one iopb, and the 1567 * controller gets one (for POLL and WAIT commands). what happens if 1568 * the iopb is busy? for i/o type [1], the buffers are queued at the 1569 * "buff" layer and * picked up later by the interrupt routine. for case 1570 * [2] we can only be blocked if there is a WAIT type I/O request being 1571 * run. since this can only happen when we are crashing, we wait a sec 1572 * and then steal the IOPB. for case [3] the process can sleep 1573 * on the iorq free list until some iopbs are available. 1574 */ 1575 1576 1577 int 1578 xyc_submit_iorq(xycsc, iorq, type) 1579 struct xyc_softc *xycsc; 1580 struct xy_iorq *iorq; 1581 int type; 1582 1583 { 1584 struct xy_iopb *dmaiopb; 1585 1586 #ifdef XYC_DEBUG 1587 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1588 device_xname(&xycsc->sc_dev), iorq, type); 1589 #endif 1590 1591 /* first check and see if controller is busy */ 1592 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1593 #ifdef XYC_DEBUG 1594 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1595 #endif 1596 if (type == XY_SUB_NOQ) 1597 return (XY_ERR_FAIL); /* failed */ 1598 switch (type) { 1599 case XY_SUB_NORM: 1600 return XY_ERR_AOK; /* success */ 1601 case XY_SUB_WAIT: 1602 while (iorq->iopb->done == 0) { 1603 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1604 } 1605 return (iorq->errnum); 1606 case XY_SUB_POLL: /* steal controller */ 1607 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1608 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1609 panic("xyc_submit_iorq: stuck xyc"); 1610 printf("%s: stole controller\n", 1611 device_xname(&xycsc->sc_dev)); 1612 break; 1613 default: 1614 panic("xyc_submit_iorq adding"); 1615 } 1616 } 1617 1618 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1619 if (dmaiopb == NULL) { /* nothing doing? */ 1620 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1621 return(XY_ERR_AOK); 1622 panic("xyc_submit_iorq: xyc_chain failed!"); 1623 } 1624 1625 XYC_GO(xycsc->xyc, dmaiopb); 1626 1627 /* command now running, wrap it up */ 1628 switch (type) { 1629 case XY_SUB_NORM: 1630 case XY_SUB_NOQ: 1631 return (XY_ERR_AOK); /* success */ 1632 case XY_SUB_WAIT: 1633 while (iorq->iopb->done == 0) { 1634 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1635 } 1636 return (iorq->errnum); 1637 case XY_SUB_POLL: 1638 return (xyc_piodriver(xycsc, iorq)); 1639 default: 1640 panic("xyc_submit_iorq wrap up"); 1641 } 1642 panic("xyc_submit_iorq"); 1643 return 0; /* not reached */ 1644 } 1645 1646 1647 /* 1648 * xyc_chain: build a chain. return dvma address of first element in 1649 * the chain. iorq != NULL: means we only want that item on the chain. 1650 */ 1651 1652 struct xy_iopb * 1653 xyc_chain(xycsc, iorq) 1654 struct xyc_softc *xycsc; 1655 struct xy_iorq *iorq; 1656 1657 { 1658 int togo, chain, hand; 1659 1660 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1661 1662 /* 1663 * promote control IOPB to the top 1664 */ 1665 if (iorq == NULL) { 1666 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1667 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1668 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1669 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1670 } 1671 1672 /* 1673 * special case: if iorq != NULL then we have a POLL or WAIT request. 1674 * we let these take priority and do them first. 1675 */ 1676 if (iorq) { 1677 xycsc->xy_chain[0] = iorq; 1678 iorq->iopb->chen = 0; 1679 return(iorq->dmaiopb); 1680 } 1681 1682 /* 1683 * NORM case: do round robin and maybe chain (if allowed and possible) 1684 */ 1685 chain = 0; 1686 hand = xycsc->xy_hand; 1687 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1688 1689 for (togo = XYC_MAXIOPB; togo > 0; 1690 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1691 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1692 1693 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1694 xycsc->iopbase[hand].done) 1695 continue; /* not ready-for-i/o */ 1696 1697 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1698 iopb = xycsc->xy_chain[chain]->iopb; 1699 iopb->chen = 0; 1700 if (chain != 0) { 1701 /* adding a link to a chain */ 1702 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1703 prev_iopb->chen = 1; 1704 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1705 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1706 } else { 1707 /* head of chain */ 1708 iorq = xycsc->xy_chain[chain]; 1709 } 1710 chain++; 1711 1712 /* quit if chaining dis-allowed */ 1713 if (xycsc->no_ols) 1714 break; 1715 } 1716 1717 return(iorq ? iorq->dmaiopb : NULL); 1718 } 1719 1720 /* 1721 * xyc_piodriver 1722 * 1723 * programmed i/o driver. this function takes over the computer 1724 * and drains off the polled i/o request. it returns the status of the iorq 1725 * the caller is interesting in. 1726 */ 1727 int 1728 xyc_piodriver(xycsc, iorq) 1729 struct xyc_softc *xycsc; 1730 struct xy_iorq *iorq; 1731 1732 { 1733 int nreset = 0; 1734 int retval = 0; 1735 u_long res; 1736 #ifdef XYC_DEBUG 1737 printf("xyc_piodriver(%s, 0x%x)\n", device_xname(&xycsc->sc_dev), iorq); 1738 #endif 1739 1740 while (iorq->iopb->done == 0) { 1741 1742 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1743 1744 /* we expect some progress soon */ 1745 if (res == XY_ERR_FAIL && nreset >= 2) { 1746 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1747 #ifdef XYC_DEBUG 1748 printf("xyc_piodriver: timeout\n"); 1749 #endif 1750 return (XY_ERR_FAIL); 1751 } 1752 if (res == XY_ERR_FAIL) { 1753 if (xyc_reset(xycsc, 0, 1754 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1755 XY_ERR_FAIL, 1756 0) == XY_ERR_FAIL) 1757 return (XY_ERR_FAIL); /* flushes all but POLL 1758 * requests, resets */ 1759 continue; 1760 } 1761 1762 xyc_remove_iorq(xycsc); /* may resubmit request */ 1763 1764 if (iorq->iopb->done == 0) 1765 xyc_start(xycsc, iorq); 1766 } 1767 1768 /* get return value */ 1769 1770 retval = iorq->errnum; 1771 1772 #ifdef XYC_DEBUG 1773 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1774 iorq->errnum, xyc_e2str(iorq->errnum)); 1775 #endif 1776 1777 /* start up any bufs that have queued */ 1778 1779 xyc_start(xycsc, NULL); 1780 1781 return (retval); 1782 } 1783 1784 /* 1785 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1786 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1787 */ 1788 void 1789 xyc_xyreset(xycsc, xysc) 1790 struct xyc_softc *xycsc; 1791 struct xy_softc *xysc; 1792 1793 { 1794 struct xy_iopb tmpiopb; 1795 struct xy_iopb *iopb; 1796 int del; 1797 1798 iopb = xycsc->ciopb; 1799 1800 /* Save contents */ 1801 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1802 1803 iopb->chen = iopb->done = iopb->errs = 0; 1804 iopb->ien = 0; 1805 iopb->com = XYCMD_RST; 1806 iopb->unit = xysc->xy_drive; 1807 1808 XYC_GO(xycsc->xyc, xycsc->ciorq->dmaiopb); 1809 1810 del = XYC_RESETUSEC; 1811 while (del > 0) { 1812 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1813 break; 1814 DELAY(1); 1815 del--; 1816 } 1817 1818 if (del <= 0 || iopb->errs) { 1819 printf("%s: off-line: %s\n", device_xname(&xycsc->sc_dev), 1820 xyc_e2str(iopb->errnum)); 1821 del = xycsc->xyc->xyc_rsetup; 1822 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1823 panic("xyc_reset"); 1824 } else { 1825 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1826 } 1827 1828 /* Restore contents */ 1829 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1830 } 1831 1832 1833 /* 1834 * xyc_reset: reset everything: requests are marked as errors except 1835 * a polled request (which is resubmitted) 1836 */ 1837 int 1838 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1839 struct xyc_softc *xycsc; 1840 int quiet, error; 1841 struct xy_iorq *blastmode; 1842 struct xy_softc *xysc; 1843 1844 { 1845 int del = 0, lcv, retval = XY_ERR_AOK; 1846 1847 /* soft reset hardware */ 1848 1849 if (!quiet) 1850 printf("%s: soft reset\n", device_xname(&xycsc->sc_dev)); 1851 del = xycsc->xyc->xyc_rsetup; 1852 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1853 if (del == XY_ERR_FAIL) { 1854 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1855 retval = XY_ERR_FAIL; 1856 } 1857 if (xysc) 1858 xyc_xyreset(xycsc, xysc); 1859 1860 /* fix queues based on "blast-mode" */ 1861 1862 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1863 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1864 1865 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1866 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1867 XY_STATE(iorq->mode) != XY_SUB_NORM) 1868 /* is it active? */ 1869 continue; 1870 1871 if (blastmode == XY_RSET_ALL || 1872 blastmode != iorq) { 1873 /* failed */ 1874 iorq->errnum = error; 1875 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1876 switch (XY_STATE(iorq->mode)) { 1877 case XY_SUB_NORM: 1878 iorq->buf->b_error = EIO; 1879 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1880 1881 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1882 iorq->dmamap->dm_mapsize, 1883 (iorq->buf->b_flags & B_READ) 1884 ? BUS_DMASYNC_POSTREAD 1885 : BUS_DMASYNC_POSTWRITE); 1886 1887 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1888 1889 (void)BUFQ_GET(iorq->xy->xyq); 1890 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1891 (xycsc->reqs[lcv].buf->b_bcount - 1892 xycsc->reqs[lcv].buf->b_resid), 1893 (xycsc->reqs[lcv].buf->b_flags & B_READ)); 1894 biodone(iorq->buf); 1895 iorq->mode = XY_SUB_FREE; 1896 break; 1897 case XY_SUB_WAIT: 1898 wakeup(iorq); 1899 case XY_SUB_POLL: 1900 iorq->mode = 1901 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1902 break; 1903 } 1904 1905 } else { 1906 1907 /* resubmit, no need to do anything here */ 1908 } 1909 } 1910 1911 /* 1912 * now, if stuff is waiting, start it. 1913 * since we just reset it should go 1914 */ 1915 xyc_start(xycsc, NULL); 1916 1917 return (retval); 1918 } 1919 1920 /* 1921 * xyc_start: start waiting buffers 1922 */ 1923 1924 void 1925 xyc_start(xycsc, iorq) 1926 struct xyc_softc *xycsc; 1927 struct xy_iorq *iorq; 1928 1929 { 1930 int lcv; 1931 struct xy_softc *xy; 1932 1933 if (iorq == NULL) { 1934 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1935 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1936 if (BUFQ_PEEK(xy->xyq) == NULL) continue; 1937 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1938 xyc_startbuf(xycsc, xy, BUFQ_PEEK(xy->xyq)); 1939 } 1940 } 1941 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1942 } 1943 1944 /* 1945 * xyc_remove_iorq: remove "done" IOPB's. 1946 */ 1947 1948 int 1949 xyc_remove_iorq(xycsc) 1950 struct xyc_softc *xycsc; 1951 1952 { 1953 int errnum, rq, comm, errs; 1954 struct xyc *xyc = xycsc->xyc; 1955 u_long addr; 1956 struct xy_iopb *iopb; 1957 struct xy_iorq *iorq; 1958 struct buf *bp; 1959 1960 if (xyc->xyc_csr & XYC_DERR) { 1961 /* 1962 * DOUBLE ERROR: should never happen under normal use. This 1963 * error is so bad, you can't even tell which IOPB is bad, so 1964 * we dump them all. 1965 */ 1966 errnum = XY_ERR_DERR; 1967 aprint_error_dev(&xycsc->sc_dev, "DOUBLE ERROR!\n"); 1968 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errnum, 0) != XY_ERR_AOK) { 1969 aprint_error_dev(&xycsc->sc_dev, "soft reset failed!\n"); 1970 panic("xyc_remove_iorq: controller DEAD"); 1971 } 1972 return (XY_ERR_AOK); 1973 } 1974 1975 /* 1976 * get iopb that is done, loop down the chain 1977 */ 1978 1979 if (xyc->xyc_csr & XYC_ERR) { 1980 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1981 } 1982 if (xyc->xyc_csr & XYC_IPND) { 1983 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1984 } 1985 1986 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1987 iorq = xycsc->xy_chain[rq]; 1988 if (iorq == NULL) break; /* done ! */ 1989 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1990 continue; /* free, or done */ 1991 iopb = iorq->iopb; 1992 if (iopb->done == 0) 1993 continue; /* not done yet */ 1994 1995 comm = iopb->com; 1996 errs = iopb->errs; 1997 1998 if (errs) 1999 iorq->errnum = iopb->errnum; 2000 else 2001 iorq->errnum = 0; 2002 2003 /* handle non-fatal errors */ 2004 2005 if (errs && 2006 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 2007 continue; /* AOK: we resubmitted it */ 2008 2009 2010 /* this iorq is now done (hasn't been restarted or anything) */ 2011 2012 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2013 xyc_perror(iorq, iopb, 0); 2014 2015 /* now, if read/write check to make sure we got all the data 2016 * we needed. (this may not be the case if we got an error in 2017 * the middle of a multisector request). */ 2018 2019 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 2020 (comm == XYCMD_RD || comm == XYCMD_WR)) { 2021 /* we just successfully processed a bad144 sector 2022 * note: if we are in bad 144 mode, the pointers have 2023 * been advanced already (see above) and are pointing 2024 * at the bad144 sector. to exit bad144 mode, we 2025 * must advance the pointers 1 sector and issue a new 2026 * request if there are still sectors left to process 2027 * 2028 */ 2029 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 2030 2031 /* exit b144 mode */ 2032 iorq->mode = iorq->mode & (~XY_MODE_B144); 2033 2034 if (iorq->sectcnt) { /* more to go! */ 2035 iorq->lasterror = iorq->errnum = iopb->errnum = 0; 2036 iopb->errs = iopb->done = 0; 2037 iorq->tries = 0; 2038 iopb->scnt = iorq->sectcnt; 2039 iopb->cyl = iorq->blockno / 2040 iorq->xy->sectpercyl; 2041 iopb->head = 2042 (iorq->blockno / iorq->xy->nhead) % 2043 iorq->xy->nhead; 2044 iopb->sect = iorq->blockno % XYFM_BPS; 2045 addr = (u_long) iorq->dbuf; 2046 iopb->dataa = (addr & 0xffff); 2047 iopb->datar = ((addr & 0xff0000) >> 16); 2048 /* will resubit at end */ 2049 continue; 2050 } 2051 } 2052 /* final cleanup, totally done with this request */ 2053 2054 switch (XY_STATE(iorq->mode)) { 2055 case XY_SUB_NORM: 2056 bp = iorq->buf; 2057 if (errs) { 2058 bp->b_error = EIO; 2059 bp->b_resid = iorq->sectcnt * XYFM_BPS; 2060 } else { 2061 bp->b_resid = 0; /* done */ 2062 } 2063 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 2064 iorq->dmamap->dm_mapsize, 2065 (iorq->buf->b_flags & B_READ) 2066 ? BUS_DMASYNC_POSTREAD 2067 : BUS_DMASYNC_POSTWRITE); 2068 2069 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 2070 2071 (void)BUFQ_GET(iorq->xy->xyq); 2072 disk_unbusy(&iorq->xy->sc_dk, 2073 (bp->b_bcount - bp->b_resid), 2074 (bp->b_flags & B_READ)); 2075 iorq->mode = XY_SUB_FREE; 2076 biodone(bp); 2077 break; 2078 case XY_SUB_WAIT: 2079 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2080 wakeup(iorq); 2081 break; 2082 case XY_SUB_POLL: 2083 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2084 break; 2085 } 2086 } 2087 2088 return (XY_ERR_AOK); 2089 } 2090 2091 /* 2092 * xyc_perror: print error. 2093 * - if still_trying is true: we got an error, retried and got a 2094 * different error. in that case lasterror is the old error, 2095 * and errnum is the new one. 2096 * - if still_trying is not true, then if we ever had an error it 2097 * is in lasterror. also, if iorq->errnum == 0, then we recovered 2098 * from that error (otherwise iorq->errnum == iorq->lasterror). 2099 */ 2100 void 2101 xyc_perror(iorq, iopb, still_trying) 2102 struct xy_iorq *iorq; 2103 struct xy_iopb *iopb; 2104 int still_trying; 2105 2106 { 2107 2108 int error = iorq->lasterror; 2109 2110 printf("%s", (iorq->xy) ? device_xname(&iorq->xy->sc_dev) 2111 : device_xname(&iorq->xyc->sc_dev)); 2112 if (iorq->buf) 2113 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2114 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2115 printf("%s %d/%d/%d: ", 2116 (iopb->com == XYCMD_RD) ? "read" : "write", 2117 iopb->cyl, iopb->head, iopb->sect); 2118 printf("%s", xyc_e2str(error)); 2119 2120 if (still_trying) 2121 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errnum)); 2122 else 2123 if (iorq->errnum == 0) 2124 printf(" [recovered in %d tries]", iorq->tries); 2125 2126 printf("\n"); 2127 } 2128 2129 /* 2130 * xyc_error: non-fatal error encountered... recover. 2131 * return AOK if resubmitted, return FAIL if this iopb is done 2132 */ 2133 int 2134 xyc_error(xycsc, iorq, iopb, comm) 2135 struct xyc_softc *xycsc; 2136 struct xy_iorq *iorq; 2137 struct xy_iopb *iopb; 2138 int comm; 2139 2140 { 2141 int errnum = iorq->errnum; 2142 int erract = xyc_entoact(errnum); 2143 int oldmode, advance; 2144 #ifdef __sparc__ 2145 int i; 2146 #endif 2147 2148 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2149 oldmode = iorq->mode; 2150 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2151 /* make xyc_start ignore us */ 2152 xyc_reset(xycsc, 1, XY_RSET_NONE, errnum, iorq->xy); 2153 iorq->mode = oldmode; 2154 } 2155 /* check for read/write to a sector in bad144 table if bad: redirect 2156 * request to bad144 area */ 2157 2158 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2159 (iorq->mode & XY_MODE_B144) == 0) { 2160 advance = iorq->sectcnt - iopb->scnt; 2161 XYC_ADVANCE(iorq, advance); 2162 #ifdef __sparc__ 2163 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2164 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2165 iorq->blockno % iorq->xy->nsect)) != -1) { 2166 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2167 * redirect */ 2168 iopb->errnum = iopb->done = iopb->errs = 0; 2169 iopb->scnt = 1; 2170 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2171 /* second to last acyl */ 2172 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2173 * standard */ 2174 iopb->head = i / iorq->xy->nhead; 2175 iopb->sect = i % iorq->xy->nhead; 2176 /* will resubmit when we come out of remove_iorq */ 2177 return (XY_ERR_AOK); /* recovered! */ 2178 } 2179 #endif 2180 } 2181 2182 /* 2183 * it isn't a bad144 sector, must be real error! see if we can retry 2184 * it? 2185 */ 2186 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2187 xyc_perror(iorq, iopb, 1); /* inform of error state 2188 * change */ 2189 iorq->lasterror = errnum; 2190 2191 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2192 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2193 iorq->tries++; 2194 iorq->errnum = iopb->errnum = iopb->done = iopb->errs = 0; 2195 /* will resubmit at end of remove_iorq */ 2196 return (XY_ERR_AOK); /* recovered! */ 2197 } 2198 2199 /* failed to recover from this error */ 2200 return (XY_ERR_FAIL); 2201 } 2202 2203 /* 2204 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2205 */ 2206 void 2207 xyc_tick(arg) 2208 void *arg; 2209 2210 { 2211 struct xyc_softc *xycsc = arg; 2212 int lcv, s, reset = 0; 2213 2214 /* reduce ttl for each request if one goes to zero, reset xyc */ 2215 s = splbio(); 2216 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2217 if (xycsc->reqs[lcv].mode == 0 || 2218 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2219 continue; 2220 xycsc->reqs[lcv].ttl--; 2221 if (xycsc->reqs[lcv].ttl == 0) 2222 reset = 1; 2223 } 2224 if (reset) { 2225 printf("%s: watchdog timeout\n", device_xname(&xycsc->sc_dev)); 2226 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2227 } 2228 splx(s); 2229 2230 /* until next time */ 2231 2232 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2233 } 2234 2235 /* 2236 * xyc_ioctlcmd: this function provides a user level interface to the 2237 * controller via ioctl. this allows "format" programs to be written 2238 * in user code, and is also useful for some debugging. we return 2239 * an error code. called at user priority. 2240 * 2241 * XXX missing a few commands (see the 7053 driver for ideas) 2242 */ 2243 int 2244 xyc_ioctlcmd(xy, dev, xio) 2245 struct xy_softc *xy; 2246 dev_t dev; 2247 struct xd_iocmd *xio; 2248 2249 { 2250 int s, rqno, dummy = 0; 2251 char *dvmabuf = NULL, *buf = NULL; 2252 struct xyc_softc *xycsc; 2253 int rseg, error; 2254 bus_dma_segment_t seg; 2255 2256 /* check sanity of requested command */ 2257 2258 switch (xio->cmd) { 2259 2260 case XYCMD_NOP: /* no op: everything should be zero */ 2261 if (xio->subfn || xio->dptr || xio->dlen || 2262 xio->block || xio->sectcnt) 2263 return (EINVAL); 2264 break; 2265 2266 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2267 case XYCMD_WR: 2268 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2269 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2270 return (EINVAL); 2271 break; 2272 2273 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2274 return (EINVAL); 2275 2276 break; 2277 2278 default: 2279 return (EINVAL);/* ??? */ 2280 } 2281 2282 xycsc = xy->parent; 2283 2284 /* create DVMA buffer for request if needed */ 2285 if (xio->dlen) { 2286 bus_addr_t busbuf; 2287 2288 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2289 &seg, &rseg, 2290 xio->dlen, (void **)&buf, 2291 &busbuf)) != 0) { 2292 return (error); 2293 } 2294 dvmabuf = (void *)(u_long)BUS_ADDR_PADDR(busbuf); 2295 2296 if (xio->cmd == XYCMD_WR) { 2297 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2298 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2299 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2300 return (error); 2301 } 2302 } 2303 } 2304 /* do it! */ 2305 2306 error = 0; 2307 s = splbio(); 2308 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2309 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2310 if (rqno == XY_ERR_FAIL) { 2311 error = EIO; 2312 goto done; 2313 } 2314 xio->errnum = xycsc->ciorq->errnum; 2315 xio->tries = xycsc->ciorq->tries; 2316 XYC_DONE(xycsc, dummy); 2317 2318 if (xio->cmd == XYCMD_RD) 2319 error = copyout(buf, xio->dptr, xio->dlen); 2320 2321 done: 2322 splx(s); 2323 if (dvmabuf) { 2324 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2325 xio->dlen, buf); 2326 } 2327 return (error); 2328 } 2329 2330 /* 2331 * xyc_e2str: convert error code number into an error string 2332 */ 2333 const char * 2334 xyc_e2str(no) 2335 int no; 2336 { 2337 switch (no) { 2338 case XY_ERR_FAIL: 2339 return ("Software fatal error"); 2340 case XY_ERR_DERR: 2341 return ("DOUBLE ERROR"); 2342 case XY_ERR_AOK: 2343 return ("Successful completion"); 2344 case XY_ERR_IPEN: 2345 return("Interrupt pending"); 2346 case XY_ERR_BCFL: 2347 return("Busy conflict"); 2348 case XY_ERR_TIMO: 2349 return("Operation timeout"); 2350 case XY_ERR_NHDR: 2351 return("Header not found"); 2352 case XY_ERR_HARD: 2353 return("Hard ECC error"); 2354 case XY_ERR_ICYL: 2355 return("Illegal cylinder address"); 2356 case XY_ERR_ISEC: 2357 return("Illegal sector address"); 2358 case XY_ERR_SMAL: 2359 return("Last sector too small"); 2360 case XY_ERR_SACK: 2361 return("Slave ACK error (non-existent memory)"); 2362 case XY_ERR_CHER: 2363 return("Cylinder and head/header error"); 2364 case XY_ERR_SRTR: 2365 return("Auto-seek retry successful"); 2366 case XY_ERR_WPRO: 2367 return("Write-protect error"); 2368 case XY_ERR_UIMP: 2369 return("Unimplemented command"); 2370 case XY_ERR_DNRY: 2371 return("Drive not ready"); 2372 case XY_ERR_SZER: 2373 return("Sector count zero"); 2374 case XY_ERR_DFLT: 2375 return("Drive faulted"); 2376 case XY_ERR_ISSZ: 2377 return("Illegal sector size"); 2378 case XY_ERR_SLTA: 2379 return("Self test A"); 2380 case XY_ERR_SLTB: 2381 return("Self test B"); 2382 case XY_ERR_SLTC: 2383 return("Self test C"); 2384 case XY_ERR_SOFT: 2385 return("Soft ECC error"); 2386 case XY_ERR_SFOK: 2387 return("Soft ECC error recovered"); 2388 case XY_ERR_IHED: 2389 return("Illegal head"); 2390 case XY_ERR_DSEQ: 2391 return("Disk sequencer error"); 2392 case XY_ERR_SEEK: 2393 return("Seek error"); 2394 default: 2395 return ("Unknown error"); 2396 } 2397 } 2398 2399 int 2400 xyc_entoact(errnum) 2401 2402 int errnum; 2403 2404 { 2405 switch (errnum) { 2406 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2407 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2408 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2409 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2410 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2411 2412 return(XY_ERA_PROG); /* program error ! */ 2413 2414 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2415 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2416 case XY_ERR_SOFT: 2417 2418 return(XY_ERA_HARD); /* hard error, retry */ 2419 2420 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2421 2422 return(XY_ERA_RSET); /* hard error reset */ 2423 2424 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2425 2426 return(XY_ERA_SOFT); /* an FYI error */ 2427 2428 case XY_ERR_WPRO: 2429 2430 return(XY_ERA_WPRO); /* write protect */ 2431 } 2432 2433 return(XY_ERA_PROG); /* ??? */ 2434 } 2435
Indexes created Tue Sep 30 20:09:53 GMT 2025