xy.c revision 1.83
1 /* $NetBSD: xy.c,v 1.83 2009/01/13 13:35:54 yamt 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 1.83 2009/01/13 13:35:54 yamt 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 = device_private(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 = device_private(self), *oxy; 629 struct xyc_softc *xyc = device_private(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_normal("\n"); 730 aprint_error_dev(&xy->sc_dev, "reading disk label failed: %s\n", 731 xyc_e2str(error)); 732 goto done; 733 } 734 printf(" (drive type %d)\n", xy->drive_type); 735 736 newstate = XY_DRIVE_NOLABEL; 737 738 xy->hw_spt = spt = 0; /* XXX needed ? */ 739 /* Attach the disk: must be before getdisklabel to malloc label */ 740 disk_init(&xy->sc_dk, device_xname(&xy->sc_dev), &xydkdriver); 741 disk_attach(&xy->sc_dk); 742 743 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 744 goto done; 745 746 /* inform the user of what is up */ 747 printf("%s: <%s>, pcyl %d\n", device_xname(&xy->sc_dev), 748 buf, xy->pcyl); 749 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 750 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 751 device_xname(&xy->sc_dev), mb, xy->ncyl, xy->nhead, xy->nsect, 752 XYFM_BPS); 753 754 /* 755 * 450/451 stupidity: the drive type is encoded into the format 756 * of the disk. the drive type in the IOPB must match the drive 757 * type in the format, or you will not be able to do I/O to the 758 * disk (you get header not found errors). if you have two drives 759 * of different sizes that have the same drive type in their 760 * formatting then you are out of luck. 761 * 762 * this problem was corrected in the 753/7053. 763 */ 764 765 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 766 oxy = xyc->sc_drives[lcv]; 767 if (oxy == NULL || oxy == xy) continue; 768 if (oxy->drive_type != xy->drive_type) continue; 769 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 770 xy->nhead != oxy->nhead) { 771 printf("%s: %s and %s must be the same size!\n", 772 device_xname(&xyc->sc_dev), device_xname(&xy->sc_dev), 773 device_xname(&oxy->sc_dev)); 774 panic("xy drive size mismatch"); 775 } 776 } 777 778 779 /* now set the real drive parameters! */ 780 781 blk = (xy->nsect - 1) + 782 ((xy->nhead - 1) * xy->nsect) + 783 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 784 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 785 XYC_DONE(xyc, error); 786 if (error) { 787 aprint_error_dev(&xy->sc_dev, "write drive size failed: %s\n", 788 xyc_e2str(error)); 789 goto done; 790 } 791 newstate = XY_DRIVE_ONLINE; 792 793 /* 794 * read bad144 table. this table resides on the first sector of the 795 * last track of the disk (i.e. second cyl of "acyl" area). 796 */ 797 798 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 799 /* last cyl */ 800 (xy->nhead - 1) * xy->nsect; /* last head */ 801 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 802 dmaddr, fmode); 803 XYC_DONE(xyc, error); 804 if (error) { 805 aprint_error_dev(&xy->sc_dev, "reading bad144 failed: %s\n", 806 xyc_e2str(error)); 807 goto done; 808 } 809 810 /* check dkbad for sanity */ 811 dkb = (struct dkbad *) buf; 812 for (lcv = 0; lcv < 126; lcv++) { 813 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 814 dkb->bt_bad[lcv].bt_cyl == 0) && 815 dkb->bt_bad[lcv].bt_trksec == 0xffff) 816 continue; /* blank */ 817 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 818 break; 819 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 820 break; 821 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 822 break; 823 } 824 if (lcv != 126) { 825 aprint_error_dev(&xy->sc_dev, "warning: invalid bad144 sector!\n"); 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 = device_lookup_private(&xy_cd, 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 part = DISKPART(dev); 894 895 xy = device_lookup_private(&xy_cd, unit); 896 if (!xy) 897 return ENXIO; 898 899 printf("%s%c: crash dump not supported (yet)\n", device_xname(&xy->sc_dev), 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 static enum kauth_device_req 919 xy_getkauthreq(u_char cmd) 920 { 921 enum kauth_device_req req; 922 923 switch (cmd) { 924 case XYCMD_WR: 925 case XYCMD_WTH: 926 case XYCMD_WFM: 927 case XYCMD_WRH: 928 req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_WRITE; 929 break; 930 931 case XYCMD_RD: 932 case XYCMD_RTH: 933 case XYCMD_RDH: 934 req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READ; 935 break; 936 937 case XYCMD_RDS: 938 case XYCMD_MBD: 939 req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READCONF; 940 break; 941 942 case XYCMD_RST: 943 case XYCMD_SDS: 944 case XYCMD_MBL: 945 req = KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_WRITECONF; 946 break; 947 948 case XYCMD_NOP: 949 case XYCMD_SK: 950 case XYCMD_ST: 951 case XYCMD_R: 952 default: 953 req = 0; 954 break; 955 } 956 957 return (req); 958 } 959 960 /* 961 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 962 */ 963 int 964 xyioctl(dev, command, addr, flag, l) 965 dev_t dev; 966 u_long command; 967 void *addr; 968 int flag; 969 struct lwp *l; 970 971 { 972 struct xy_softc *xy; 973 struct xd_iocmd *xio; 974 int error, s, unit; 975 #ifdef __HAVE_OLD_DISKLABEL 976 struct disklabel newlabel; 977 #endif 978 struct disklabel *lp; 979 980 unit = DISKUNIT(dev); 981 982 if ((xy = device_lookup_private(&xy_cd, unit)) == NULL) 983 return (ENXIO); 984 985 /* switch on ioctl type */ 986 987 switch (command) { 988 case DIOCSBAD: /* set bad144 info */ 989 if ((flag & FWRITE) == 0) 990 return EBADF; 991 s = splbio(); 992 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 993 splx(s); 994 return 0; 995 996 case DIOCGDINFO: /* get disk label */ 997 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 998 return 0; 999 #ifdef __HAVE_OLD_DISKLABEL 1000 case ODIOCGDINFO: 1001 newlabel = *(xy->sc_dk.dk_label); 1002 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 1003 return ENOTTY; 1004 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 1005 return 0; 1006 #endif 1007 1008 case DIOCGPART: /* get partition info */ 1009 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 1010 ((struct partinfo *) addr)->part = 1011 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 1012 return 0; 1013 1014 case DIOCSDINFO: /* set disk label */ 1015 #ifdef __HAVE_OLD_DISKLABEL 1016 case ODIOCSDINFO: 1017 if (command == ODIOCSDINFO) { 1018 memset(&newlabel, 0, sizeof newlabel); 1019 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 1020 lp = &newlabel; 1021 } else 1022 #endif 1023 lp = (struct disklabel *)addr; 1024 1025 if ((flag & FWRITE) == 0) 1026 return EBADF; 1027 error = setdisklabel(xy->sc_dk.dk_label, 1028 lp, /* xy->sc_dk.dk_openmask : */ 0, 1029 xy->sc_dk.dk_cpulabel); 1030 if (error == 0) { 1031 if (xy->state == XY_DRIVE_NOLABEL) 1032 xy->state = XY_DRIVE_ONLINE; 1033 } 1034 return error; 1035 1036 case DIOCWLABEL: /* change write status of disk label */ 1037 if ((flag & FWRITE) == 0) 1038 return EBADF; 1039 if (*(int *) addr) 1040 xy->flags |= XY_WLABEL; 1041 else 1042 xy->flags &= ~XY_WLABEL; 1043 return 0; 1044 1045 case DIOCWDINFO: /* write disk label */ 1046 #ifdef __HAVE_OLD_DISKLABEL 1047 case ODIOCWDINFO: 1048 if (command == ODIOCWDINFO) { 1049 memset(&newlabel, 0, sizeof newlabel); 1050 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 1051 lp = &newlabel; 1052 } else 1053 #endif 1054 lp = (struct disklabel *)addr; 1055 1056 if ((flag & FWRITE) == 0) 1057 return EBADF; 1058 error = setdisklabel(xy->sc_dk.dk_label, 1059 lp, /* xy->sc_dk.dk_openmask : */ 0, 1060 xy->sc_dk.dk_cpulabel); 1061 if (error == 0) { 1062 if (xy->state == XY_DRIVE_NOLABEL) 1063 xy->state = XY_DRIVE_ONLINE; 1064 1065 /* Simulate opening partition 0 so write succeeds. */ 1066 xy->sc_dk.dk_openmask |= (1 << 0); 1067 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 1068 xystrategy, xy->sc_dk.dk_label, 1069 xy->sc_dk.dk_cpulabel); 1070 xy->sc_dk.dk_openmask = 1071 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1072 } 1073 return error; 1074 1075 case DIOSXDCMD: { 1076 enum kauth_device_req req; 1077 1078 xio = (struct xd_iocmd *) addr; 1079 req = xy_getkauthreq(xio->cmd); 1080 if ((error = kauth_authorize_device_passthru(l->l_cred, 1081 dev, req, xio)) != 0) 1082 return (error); 1083 return (xyc_ioctlcmd(xy, dev, xio)); 1084 } 1085 1086 default: 1087 return ENOTTY; 1088 } 1089 } 1090 1091 /* 1092 * xyopen: open drive 1093 */ 1094 1095 int 1096 xyopen(dev, flag, fmt, l) 1097 dev_t dev; 1098 int flag, fmt; 1099 struct lwp *l; 1100 { 1101 int unit, part; 1102 struct xy_softc *xy; 1103 struct xyc_attach_args xa; 1104 1105 /* first, could it be a valid target? */ 1106 1107 unit = DISKUNIT(dev); 1108 if ((xy = device_lookup_private(&xy_cd, unit)) == NULL) 1109 return (ENXIO); 1110 part = DISKPART(dev); 1111 1112 /* do we need to attach the drive? */ 1113 1114 if (xy->state == XY_DRIVE_UNKNOWN) { 1115 xa.driveno = xy->xy_drive; 1116 xa.fullmode = XY_SUB_WAIT; 1117 xa.booting = 0; 1118 xyattach((struct device *) xy->parent, 1119 (struct device *) xy, &xa); 1120 if (xy->state == XY_DRIVE_UNKNOWN) { 1121 return (EIO); 1122 } 1123 } 1124 /* check for partition */ 1125 1126 if (part != RAW_PART && 1127 (part >= xy->sc_dk.dk_label->d_npartitions || 1128 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1129 return (ENXIO); 1130 } 1131 /* set open masks */ 1132 1133 switch (fmt) { 1134 case S_IFCHR: 1135 xy->sc_dk.dk_copenmask |= (1 << part); 1136 break; 1137 case S_IFBLK: 1138 xy->sc_dk.dk_bopenmask |= (1 << part); 1139 break; 1140 } 1141 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1142 1143 return 0; 1144 } 1145 1146 int 1147 xyread(dev, uio, flags) 1148 dev_t dev; 1149 struct uio *uio; 1150 int flags; 1151 { 1152 1153 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1154 } 1155 1156 int 1157 xywrite(dev, uio, flags) 1158 dev_t dev; 1159 struct uio *uio; 1160 int flags; 1161 { 1162 1163 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1164 } 1165 1166 1167 /* 1168 * xysize: return size of a partition for a dump 1169 */ 1170 1171 int 1172 xysize(dev) 1173 dev_t dev; 1174 1175 { 1176 struct xy_softc *xysc; 1177 int unit, part, size, omask; 1178 1179 /* valid unit? */ 1180 unit = DISKUNIT(dev); 1181 if ((xysc = device_lookup_private(&xy_cd, unit)) == NULL) 1182 return (-1); 1183 1184 part = DISKPART(dev); 1185 omask = xysc->sc_dk.dk_openmask & (1 << part); 1186 1187 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1188 return (-1); 1189 1190 /* do it */ 1191 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1192 size = -1; /* only give valid size for swap partitions */ 1193 else 1194 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1195 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1196 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1197 return (-1); 1198 return (size); 1199 } 1200 1201 /* 1202 * xystrategy: buffering system interface to xy. 1203 */ 1204 1205 void 1206 xystrategy(bp) 1207 struct buf *bp; 1208 1209 { 1210 struct xy_softc *xy; 1211 int s, unit; 1212 struct xyc_attach_args xa; 1213 struct disklabel *lp; 1214 daddr_t blkno; 1215 1216 unit = DISKUNIT(bp->b_dev); 1217 1218 /* check for live device */ 1219 1220 if (!(xy = device_lookup_private(&xy_cd, unit)) || 1221 bp->b_blkno < 0 || 1222 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1223 bp->b_error = EINVAL; 1224 goto done; 1225 } 1226 /* do we need to attach the drive? */ 1227 1228 if (xy->state == XY_DRIVE_UNKNOWN) { 1229 xa.driveno = xy->xy_drive; 1230 xa.fullmode = XY_SUB_WAIT; 1231 xa.booting = 0; 1232 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1233 if (xy->state == XY_DRIVE_UNKNOWN) { 1234 bp->b_error = EIO; 1235 goto done; 1236 } 1237 } 1238 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1239 /* no I/O to unlabeled disks, unless raw partition */ 1240 bp->b_error = EIO; 1241 goto done; 1242 } 1243 /* short circuit zero length request */ 1244 1245 if (bp->b_bcount == 0) 1246 goto done; 1247 1248 /* check bounds with label (disksubr.c). Determine the size of the 1249 * transfer, and make sure it is within the boundaries of the 1250 * partition. Adjust transfer if needed, and signal errors or early 1251 * completion. */ 1252 1253 lp = xy->sc_dk.dk_label; 1254 1255 if (bounds_check_with_label(&xy->sc_dk, bp, 1256 (xy->flags & XY_WLABEL) != 0) <= 0) 1257 goto done; 1258 1259 /* 1260 * Now convert the block number to absolute and put it in 1261 * terms of the device's logical block size. 1262 */ 1263 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1264 if (DISKPART(bp->b_dev) != RAW_PART) 1265 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1266 1267 bp->b_rawblkno = blkno; 1268 1269 /* 1270 * now we know we have a valid buf structure that we need to do I/O 1271 * on. 1272 */ 1273 s = splbio(); /* protect the queues */ 1274 1275 bufq_put(xy->xyq, bp); 1276 1277 /* start 'em up */ 1278 1279 xyc_start(xy->parent, NULL); 1280 1281 /* done! */ 1282 1283 splx(s); 1284 return; 1285 1286 done: /* tells upper layers we are done with this 1287 * buf */ 1288 bp->b_resid = bp->b_bcount; 1289 biodone(bp); 1290 } 1291 /* 1292 * end of {b,c}devsw functions 1293 */ 1294 1295 /* 1296 * i n t e r r u p t f u n c t i o n 1297 * 1298 * xycintr: hardware interrupt. 1299 */ 1300 int 1301 xycintr(v) 1302 void *v; 1303 1304 { 1305 struct xyc_softc *xycsc = v; 1306 1307 /* kick the event counter */ 1308 1309 xycsc->sc_intrcnt.ev_count++; 1310 1311 /* remove as many done IOPBs as possible */ 1312 1313 xyc_remove_iorq(xycsc); 1314 1315 /* start any iorq's already waiting */ 1316 1317 xyc_start(xycsc, NULL); 1318 1319 return (1); 1320 } 1321 /* 1322 * end of interrupt function 1323 */ 1324 1325 /* 1326 * i n t e r n a l f u n c t i o n s 1327 */ 1328 1329 /* 1330 * xyc_rqinit: fill out the fields of an I/O request 1331 */ 1332 1333 inline void 1334 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1335 struct xy_iorq *rq; 1336 struct xyc_softc *xyc; 1337 struct xy_softc *xy; 1338 int md; 1339 u_long blk; 1340 int cnt; 1341 void *db; 1342 struct buf *bp; 1343 { 1344 rq->xyc = xyc; 1345 rq->xy = xy; 1346 rq->ttl = XYC_MAXTTL + 10; 1347 rq->mode = md; 1348 rq->tries = rq->errnum = rq->lasterror = 0; 1349 rq->blockno = blk; 1350 rq->sectcnt = cnt; 1351 rq->dbuf = db; 1352 rq->buf = bp; 1353 } 1354 1355 /* 1356 * xyc_rqtopb: load up an IOPB based on an iorq 1357 */ 1358 1359 void 1360 xyc_rqtopb(iorq, iopb, cmd, subfun) 1361 struct xy_iorq *iorq; 1362 struct xy_iopb *iopb; 1363 int cmd, subfun; 1364 1365 { 1366 u_long block, dp; 1367 1368 /* normal IOPB case, standard stuff */ 1369 1370 /* chain bit handled later */ 1371 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1372 iopb->com = cmd; 1373 iopb->errnum = 0; 1374 iopb->errs = 0; 1375 iopb->done = 0; 1376 if (iorq->xy) { 1377 iopb->unit = iorq->xy->xy_drive; 1378 iopb->dt = iorq->xy->drive_type; 1379 } else { 1380 iopb->unit = 0; 1381 iopb->dt = 0; 1382 } 1383 block = iorq->blockno; 1384 if (iorq->xy == NULL || block == 0) { 1385 iopb->sect = iopb->head = iopb->cyl = 0; 1386 } else { 1387 iopb->sect = block % iorq->xy->nsect; 1388 block = block / iorq->xy->nsect; 1389 iopb->head = block % iorq->xy->nhead; 1390 block = block / iorq->xy->nhead; 1391 iopb->cyl = block; 1392 } 1393 iopb->scnt = iorq->sectcnt; 1394 dp = (u_long) iorq->dbuf; 1395 if (iorq->dbuf == NULL) { 1396 iopb->dataa = 0; 1397 iopb->datar = 0; 1398 } else { 1399 iopb->dataa = (dp & 0xffff); 1400 iopb->datar = ((dp & 0xff0000) >> 16); 1401 } 1402 iopb->subfn = subfun; 1403 } 1404 1405 1406 /* 1407 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1408 */ 1409 1410 int 1411 xyc_unbusy(xyc, del) 1412 1413 struct xyc *xyc; 1414 int del; 1415 1416 { 1417 while (del-- > 0) { 1418 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1419 break; 1420 DELAY(1); 1421 } 1422 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1423 } 1424 1425 /* 1426 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1427 * note that NORM requests are handled separately. 1428 */ 1429 int 1430 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1431 struct xyc_softc *xycsc; 1432 int cmd, subfn, unit, block, scnt; 1433 char *dptr; 1434 int fullmode; 1435 1436 { 1437 int submode = XY_STATE(fullmode); 1438 struct xy_iorq *iorq = xycsc->ciorq; 1439 struct xy_iopb *iopb = xycsc->ciopb; 1440 1441 /* 1442 * is someone else using the control iopq wait for it if we can 1443 */ 1444 start: 1445 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1446 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1447 return(XY_ERR_FAIL); 1448 goto start; 1449 } 1450 1451 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1452 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1453 iorq->mode = XY_SUB_FREE; 1454 printf("%s: stole control iopb\n", device_xname(&xycsc->sc_dev)); 1455 } 1456 1457 /* init iorq/iopb */ 1458 1459 xyc_rqinit(iorq, xycsc, 1460 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1461 fullmode, block, scnt, dptr, NULL); 1462 1463 /* load IOPB from iorq */ 1464 1465 xyc_rqtopb(iorq, iopb, cmd, subfn); 1466 1467 /* submit it for processing */ 1468 1469 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1470 1471 return(XY_ERR_AOK); 1472 } 1473 1474 /* 1475 * xyc_startbuf 1476 * start a buffer for running 1477 */ 1478 1479 int 1480 xyc_startbuf(xycsc, xysc, bp) 1481 struct xyc_softc *xycsc; 1482 struct xy_softc *xysc; 1483 struct buf *bp; 1484 1485 { 1486 int partno, error; 1487 struct xy_iorq *iorq; 1488 struct xy_iopb *iopb; 1489 u_long block; 1490 1491 iorq = xysc->xyrq; 1492 iopb = iorq->iopb; 1493 1494 /* get buf */ 1495 1496 if (bp == NULL) 1497 panic("xyc_startbuf null buf"); 1498 1499 partno = DISKPART(bp->b_dev); 1500 #ifdef XYC_DEBUG 1501 printf("xyc_startbuf: %s%c: %s block %d\n", device_xname(&xysc->sc_dev), 1502 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1503 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1504 bp->b_bcount, bp->b_data); 1505 #endif 1506 1507 /* 1508 * load request. 1509 * 1510 * note that iorq points to the buffer as mapped into DVMA space, 1511 * where as the bp->b_data points to its non-DVMA mapping. 1512 */ 1513 1514 block = bp->b_rawblkno; 1515 1516 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1517 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1518 if (error != 0) { 1519 aprint_error_dev(&xycsc->sc_dev, "warning: cannot load DMA map\n"); 1520 return (XY_ERR_FAIL); /* XXX: need some sort of 1521 * call-back scheme here? */ 1522 } 1523 1524 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1525 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1526 ? BUS_DMASYNC_PREREAD 1527 : BUS_DMASYNC_PREWRITE); 1528 1529 /* init iorq and load iopb from it */ 1530 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1531 bp->b_bcount / XYFM_BPS, 1532 (void *)(u_long)iorq->dmamap->dm_segs[0].ds_addr, 1533 bp); 1534 1535 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1536 1537 /* Instrumentation. */ 1538 disk_busy(&xysc->sc_dk); 1539 1540 return (XY_ERR_AOK); 1541 } 1542 1543 1544 /* 1545 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1546 * if ok. if it fail returns an error code. type is XY_SUB_*. 1547 * 1548 * note: caller frees iorq in all cases except NORM 1549 * 1550 * return value: 1551 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1552 * WAIT: XY_AOK (success), <error-code> (failed) 1553 * POLL: <same as WAIT> 1554 * NOQ : <same as NORM> 1555 * 1556 * there are three sources for i/o requests: 1557 * [1] xystrategy: normal block I/O, using "struct buf" system. 1558 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1559 * [3] open/ioctl: these are I/O requests done in the context of a process, 1560 * and the process should block until they are done. 1561 * 1562 * software state is stored in the iorq structure. each iorq has an 1563 * iopb structure. the hardware understands the iopb structure. 1564 * every command must go through an iopb. a 450 handles one iopb at a 1565 * time, where as a 451 can take them in chains. [the 450 claims it 1566 * can handle chains, but is appears to be buggy...] iopb are allocated 1567 * in DVMA space at boot up time. each disk gets one iopb, and the 1568 * controller gets one (for POLL and WAIT commands). what happens if 1569 * the iopb is busy? for i/o type [1], the buffers are queued at the 1570 * "buff" layer and * picked up later by the interrupt routine. for case 1571 * [2] we can only be blocked if there is a WAIT type I/O request being 1572 * run. since this can only happen when we are crashing, we wait a sec 1573 * and then steal the IOPB. for case [3] the process can sleep 1574 * on the iorq free list until some iopbs are available. 1575 */ 1576 1577 1578 int 1579 xyc_submit_iorq(xycsc, iorq, type) 1580 struct xyc_softc *xycsc; 1581 struct xy_iorq *iorq; 1582 int type; 1583 1584 { 1585 struct xy_iopb *dmaiopb; 1586 1587 #ifdef XYC_DEBUG 1588 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1589 device_xname(&xycsc->sc_dev), iorq, type); 1590 #endif 1591 1592 /* first check and see if controller is busy */ 1593 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1594 #ifdef XYC_DEBUG 1595 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1596 #endif 1597 if (type == XY_SUB_NOQ) 1598 return (XY_ERR_FAIL); /* failed */ 1599 switch (type) { 1600 case XY_SUB_NORM: 1601 return XY_ERR_AOK; /* success */ 1602 case XY_SUB_WAIT: 1603 while (iorq->iopb->done == 0) { 1604 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1605 } 1606 return (iorq->errnum); 1607 case XY_SUB_POLL: /* steal controller */ 1608 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1609 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1610 panic("xyc_submit_iorq: stuck xyc"); 1611 printf("%s: stole controller\n", 1612 device_xname(&xycsc->sc_dev)); 1613 break; 1614 default: 1615 panic("xyc_submit_iorq adding"); 1616 } 1617 } 1618 1619 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1620 if (dmaiopb == NULL) { /* nothing doing? */ 1621 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1622 return(XY_ERR_AOK); 1623 panic("xyc_submit_iorq: xyc_chain failed!"); 1624 } 1625 1626 XYC_GO(xycsc->xyc, dmaiopb); 1627 1628 /* command now running, wrap it up */ 1629 switch (type) { 1630 case XY_SUB_NORM: 1631 case XY_SUB_NOQ: 1632 return (XY_ERR_AOK); /* success */ 1633 case XY_SUB_WAIT: 1634 while (iorq->iopb->done == 0) { 1635 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1636 } 1637 return (iorq->errnum); 1638 case XY_SUB_POLL: 1639 return (xyc_piodriver(xycsc, iorq)); 1640 default: 1641 panic("xyc_submit_iorq wrap up"); 1642 } 1643 panic("xyc_submit_iorq"); 1644 return 0; /* not reached */ 1645 } 1646 1647 1648 /* 1649 * xyc_chain: build a chain. return dvma address of first element in 1650 * the chain. iorq != NULL: means we only want that item on the chain. 1651 */ 1652 1653 struct xy_iopb * 1654 xyc_chain(xycsc, iorq) 1655 struct xyc_softc *xycsc; 1656 struct xy_iorq *iorq; 1657 1658 { 1659 int togo, chain, hand; 1660 1661 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1662 1663 /* 1664 * promote control IOPB to the top 1665 */ 1666 if (iorq == NULL) { 1667 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1668 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1669 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1670 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1671 } 1672 1673 /* 1674 * special case: if iorq != NULL then we have a POLL or WAIT request. 1675 * we let these take priority and do them first. 1676 */ 1677 if (iorq) { 1678 xycsc->xy_chain[0] = iorq; 1679 iorq->iopb->chen = 0; 1680 return(iorq->dmaiopb); 1681 } 1682 1683 /* 1684 * NORM case: do round robin and maybe chain (if allowed and possible) 1685 */ 1686 chain = 0; 1687 hand = xycsc->xy_hand; 1688 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1689 1690 for (togo = XYC_MAXIOPB; togo > 0; 1691 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1692 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1693 1694 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1695 xycsc->iopbase[hand].done) 1696 continue; /* not ready-for-i/o */ 1697 1698 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1699 iopb = xycsc->xy_chain[chain]->iopb; 1700 iopb->chen = 0; 1701 if (chain != 0) { 1702 /* adding a link to a chain */ 1703 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1704 prev_iopb->chen = 1; 1705 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1706 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1707 } else { 1708 /* head of chain */ 1709 iorq = xycsc->xy_chain[chain]; 1710 } 1711 chain++; 1712 1713 /* quit if chaining dis-allowed */ 1714 if (xycsc->no_ols) 1715 break; 1716 } 1717 1718 return(iorq ? iorq->dmaiopb : NULL); 1719 } 1720 1721 /* 1722 * xyc_piodriver 1723 * 1724 * programmed i/o driver. this function takes over the computer 1725 * and drains off the polled i/o request. it returns the status of the iorq 1726 * the caller is interesting in. 1727 */ 1728 int 1729 xyc_piodriver(xycsc, iorq) 1730 struct xyc_softc *xycsc; 1731 struct xy_iorq *iorq; 1732 1733 { 1734 int nreset = 0; 1735 int retval = 0; 1736 u_long res; 1737 #ifdef XYC_DEBUG 1738 printf("xyc_piodriver(%s, 0x%x)\n", device_xname(&xycsc->sc_dev), iorq); 1739 #endif 1740 1741 while (iorq->iopb->done == 0) { 1742 1743 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1744 1745 /* we expect some progress soon */ 1746 if (res == XY_ERR_FAIL && nreset >= 2) { 1747 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1748 #ifdef XYC_DEBUG 1749 printf("xyc_piodriver: timeout\n"); 1750 #endif 1751 return (XY_ERR_FAIL); 1752 } 1753 if (res == XY_ERR_FAIL) { 1754 if (xyc_reset(xycsc, 0, 1755 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1756 XY_ERR_FAIL, 1757 0) == XY_ERR_FAIL) 1758 return (XY_ERR_FAIL); /* flushes all but POLL 1759 * requests, resets */ 1760 continue; 1761 } 1762 1763 xyc_remove_iorq(xycsc); /* may resubmit request */ 1764 1765 if (iorq->iopb->done == 0) 1766 xyc_start(xycsc, iorq); 1767 } 1768 1769 /* get return value */ 1770 1771 retval = iorq->errnum; 1772 1773 #ifdef XYC_DEBUG 1774 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1775 iorq->errnum, xyc_e2str(iorq->errnum)); 1776 #endif 1777 1778 /* start up any bufs that have queued */ 1779 1780 xyc_start(xycsc, NULL); 1781 1782 return (retval); 1783 } 1784 1785 /* 1786 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1787 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1788 */ 1789 void 1790 xyc_xyreset(xycsc, xysc) 1791 struct xyc_softc *xycsc; 1792 struct xy_softc *xysc; 1793 1794 { 1795 struct xy_iopb tmpiopb; 1796 struct xy_iopb *iopb; 1797 int del; 1798 1799 iopb = xycsc->ciopb; 1800 1801 /* Save contents */ 1802 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1803 1804 iopb->chen = iopb->done = iopb->errs = 0; 1805 iopb->ien = 0; 1806 iopb->com = XYCMD_RST; 1807 iopb->unit = xysc->xy_drive; 1808 1809 XYC_GO(xycsc->xyc, xycsc->ciorq->dmaiopb); 1810 1811 del = XYC_RESETUSEC; 1812 while (del > 0) { 1813 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1814 break; 1815 DELAY(1); 1816 del--; 1817 } 1818 1819 if (del <= 0 || iopb->errs) { 1820 printf("%s: off-line: %s\n", device_xname(&xycsc->sc_dev), 1821 xyc_e2str(iopb->errnum)); 1822 del = xycsc->xyc->xyc_rsetup; 1823 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1824 panic("xyc_reset"); 1825 } else { 1826 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1827 } 1828 1829 /* Restore contents */ 1830 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1831 } 1832 1833 1834 /* 1835 * xyc_reset: reset everything: requests are marked as errors except 1836 * a polled request (which is resubmitted) 1837 */ 1838 int 1839 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1840 struct xyc_softc *xycsc; 1841 int quiet, error; 1842 struct xy_iorq *blastmode; 1843 struct xy_softc *xysc; 1844 1845 { 1846 int del = 0, lcv, retval = XY_ERR_AOK; 1847 1848 /* soft reset hardware */ 1849 1850 if (!quiet) 1851 printf("%s: soft reset\n", device_xname(&xycsc->sc_dev)); 1852 del = xycsc->xyc->xyc_rsetup; 1853 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1854 if (del == XY_ERR_FAIL) { 1855 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1856 retval = XY_ERR_FAIL; 1857 } 1858 if (xysc) 1859 xyc_xyreset(xycsc, xysc); 1860 1861 /* fix queues based on "blast-mode" */ 1862 1863 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1864 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1865 1866 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1867 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1868 XY_STATE(iorq->mode) != XY_SUB_NORM) 1869 /* is it active? */ 1870 continue; 1871 1872 if (blastmode == XY_RSET_ALL || 1873 blastmode != iorq) { 1874 /* failed */ 1875 iorq->errnum = error; 1876 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1877 switch (XY_STATE(iorq->mode)) { 1878 case XY_SUB_NORM: 1879 iorq->buf->b_error = EIO; 1880 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1881 1882 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1883 iorq->dmamap->dm_mapsize, 1884 (iorq->buf->b_flags & B_READ) 1885 ? BUS_DMASYNC_POSTREAD 1886 : BUS_DMASYNC_POSTWRITE); 1887 1888 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1889 1890 (void)bufq_get(iorq->xy->xyq); 1891 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1892 (xycsc->reqs[lcv].buf->b_bcount - 1893 xycsc->reqs[lcv].buf->b_resid), 1894 (xycsc->reqs[lcv].buf->b_flags & B_READ)); 1895 biodone(iorq->buf); 1896 iorq->mode = XY_SUB_FREE; 1897 break; 1898 case XY_SUB_WAIT: 1899 wakeup(iorq); 1900 case XY_SUB_POLL: 1901 iorq->mode = 1902 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1903 break; 1904 } 1905 1906 } else { 1907 1908 /* resubmit, no need to do anything here */ 1909 } 1910 } 1911 1912 /* 1913 * now, if stuff is waiting, start it. 1914 * since we just reset it should go 1915 */ 1916 xyc_start(xycsc, NULL); 1917 1918 return (retval); 1919 } 1920 1921 /* 1922 * xyc_start: start waiting buffers 1923 */ 1924 1925 void 1926 xyc_start(xycsc, iorq) 1927 struct xyc_softc *xycsc; 1928 struct xy_iorq *iorq; 1929 1930 { 1931 int lcv; 1932 struct xy_softc *xy; 1933 1934 if (iorq == NULL) { 1935 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1936 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1937 if (bufq_peek(xy->xyq) == NULL) continue; 1938 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1939 xyc_startbuf(xycsc, xy, bufq_peek(xy->xyq)); 1940 } 1941 } 1942 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1943 } 1944 1945 /* 1946 * xyc_remove_iorq: remove "done" IOPB's. 1947 */ 1948 1949 int 1950 xyc_remove_iorq(xycsc) 1951 struct xyc_softc *xycsc; 1952 1953 { 1954 int errnum, rq, comm, errs; 1955 struct xyc *xyc = xycsc->xyc; 1956 u_long addr; 1957 struct xy_iopb *iopb; 1958 struct xy_iorq *iorq; 1959 struct buf *bp; 1960 1961 if (xyc->xyc_csr & XYC_DERR) { 1962 /* 1963 * DOUBLE ERROR: should never happen under normal use. This 1964 * error is so bad, you can't even tell which IOPB is bad, so 1965 * we dump them all. 1966 */ 1967 errnum = XY_ERR_DERR; 1968 aprint_error_dev(&xycsc->sc_dev, "DOUBLE ERROR!\n"); 1969 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errnum, 0) != XY_ERR_AOK) { 1970 aprint_error_dev(&xycsc->sc_dev, "soft reset failed!\n"); 1971 panic("xyc_remove_iorq: controller DEAD"); 1972 } 1973 return (XY_ERR_AOK); 1974 } 1975 1976 /* 1977 * get iopb that is done, loop down the chain 1978 */ 1979 1980 if (xyc->xyc_csr & XYC_ERR) { 1981 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1982 } 1983 if (xyc->xyc_csr & XYC_IPND) { 1984 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1985 } 1986 1987 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1988 iorq = xycsc->xy_chain[rq]; 1989 if (iorq == NULL) break; /* done ! */ 1990 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1991 continue; /* free, or done */ 1992 iopb = iorq->iopb; 1993 if (iopb->done == 0) 1994 continue; /* not done yet */ 1995 1996 comm = iopb->com; 1997 errs = iopb->errs; 1998 1999 if (errs) 2000 iorq->errnum = iopb->errnum; 2001 else 2002 iorq->errnum = 0; 2003 2004 /* handle non-fatal errors */ 2005 2006 if (errs && 2007 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 2008 continue; /* AOK: we resubmitted it */ 2009 2010 2011 /* this iorq is now done (hasn't been restarted or anything) */ 2012 2013 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2014 xyc_perror(iorq, iopb, 0); 2015 2016 /* now, if read/write check to make sure we got all the data 2017 * we needed. (this may not be the case if we got an error in 2018 * the middle of a multisector request). */ 2019 2020 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 2021 (comm == XYCMD_RD || comm == XYCMD_WR)) { 2022 /* we just successfully processed a bad144 sector 2023 * note: if we are in bad 144 mode, the pointers have 2024 * been advanced already (see above) and are pointing 2025 * at the bad144 sector. to exit bad144 mode, we 2026 * must advance the pointers 1 sector and issue a new 2027 * request if there are still sectors left to process 2028 * 2029 */ 2030 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 2031 2032 /* exit b144 mode */ 2033 iorq->mode = iorq->mode & (~XY_MODE_B144); 2034 2035 if (iorq->sectcnt) { /* more to go! */ 2036 iorq->lasterror = iorq->errnum = iopb->errnum = 0; 2037 iopb->errs = iopb->done = 0; 2038 iorq->tries = 0; 2039 iopb->scnt = iorq->sectcnt; 2040 iopb->cyl = iorq->blockno / 2041 iorq->xy->sectpercyl; 2042 iopb->head = 2043 (iorq->blockno / iorq->xy->nhead) % 2044 iorq->xy->nhead; 2045 iopb->sect = iorq->blockno % XYFM_BPS; 2046 addr = (u_long) iorq->dbuf; 2047 iopb->dataa = (addr & 0xffff); 2048 iopb->datar = ((addr & 0xff0000) >> 16); 2049 /* will resubit at end */ 2050 continue; 2051 } 2052 } 2053 /* final cleanup, totally done with this request */ 2054 2055 switch (XY_STATE(iorq->mode)) { 2056 case XY_SUB_NORM: 2057 bp = iorq->buf; 2058 if (errs) { 2059 bp->b_error = EIO; 2060 bp->b_resid = iorq->sectcnt * XYFM_BPS; 2061 } else { 2062 bp->b_resid = 0; /* done */ 2063 } 2064 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 2065 iorq->dmamap->dm_mapsize, 2066 (iorq->buf->b_flags & B_READ) 2067 ? BUS_DMASYNC_POSTREAD 2068 : BUS_DMASYNC_POSTWRITE); 2069 2070 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 2071 2072 (void)bufq_get(iorq->xy->xyq); 2073 disk_unbusy(&iorq->xy->sc_dk, 2074 (bp->b_bcount - bp->b_resid), 2075 (bp->b_flags & B_READ)); 2076 iorq->mode = XY_SUB_FREE; 2077 biodone(bp); 2078 break; 2079 case XY_SUB_WAIT: 2080 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2081 wakeup(iorq); 2082 break; 2083 case XY_SUB_POLL: 2084 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 2085 break; 2086 } 2087 } 2088 2089 return (XY_ERR_AOK); 2090 } 2091 2092 /* 2093 * xyc_perror: print error. 2094 * - if still_trying is true: we got an error, retried and got a 2095 * different error. in that case lasterror is the old error, 2096 * and errnum is the new one. 2097 * - if still_trying is not true, then if we ever had an error it 2098 * is in lasterror. also, if iorq->errnum == 0, then we recovered 2099 * from that error (otherwise iorq->errnum == iorq->lasterror). 2100 */ 2101 void 2102 xyc_perror(iorq, iopb, still_trying) 2103 struct xy_iorq *iorq; 2104 struct xy_iopb *iopb; 2105 int still_trying; 2106 2107 { 2108 2109 int error = iorq->lasterror; 2110 2111 printf("%s", (iorq->xy) ? device_xname(&iorq->xy->sc_dev) 2112 : device_xname(&iorq->xyc->sc_dev)); 2113 if (iorq->buf) 2114 printf("%c: ", 'a' + (char)DISKPART(iorq->buf->b_dev)); 2115 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2116 printf("%s %d/%d/%d: ", 2117 (iopb->com == XYCMD_RD) ? "read" : "write", 2118 iopb->cyl, iopb->head, iopb->sect); 2119 printf("%s", xyc_e2str(error)); 2120 2121 if (still_trying) 2122 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errnum)); 2123 else 2124 if (iorq->errnum == 0) 2125 printf(" [recovered in %d tries]", iorq->tries); 2126 2127 printf("\n"); 2128 } 2129 2130 /* 2131 * xyc_error: non-fatal error encountered... recover. 2132 * return AOK if resubmitted, return FAIL if this iopb is done 2133 */ 2134 int 2135 xyc_error(xycsc, iorq, iopb, comm) 2136 struct xyc_softc *xycsc; 2137 struct xy_iorq *iorq; 2138 struct xy_iopb *iopb; 2139 int comm; 2140 2141 { 2142 int errnum = iorq->errnum; 2143 int erract = xyc_entoact(errnum); 2144 int oldmode, advance; 2145 #ifdef __sparc__ 2146 int i; 2147 #endif 2148 2149 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2150 oldmode = iorq->mode; 2151 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2152 /* make xyc_start ignore us */ 2153 xyc_reset(xycsc, 1, XY_RSET_NONE, errnum, iorq->xy); 2154 iorq->mode = oldmode; 2155 } 2156 /* check for read/write to a sector in bad144 table if bad: redirect 2157 * request to bad144 area */ 2158 2159 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2160 (iorq->mode & XY_MODE_B144) == 0) { 2161 advance = iorq->sectcnt - iopb->scnt; 2162 XYC_ADVANCE(iorq, advance); 2163 #ifdef __sparc__ 2164 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2165 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2166 iorq->blockno % iorq->xy->nsect)) != -1) { 2167 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2168 * redirect */ 2169 iopb->errnum = iopb->done = iopb->errs = 0; 2170 iopb->scnt = 1; 2171 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2172 /* second to last acyl */ 2173 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2174 * standard */ 2175 iopb->head = i / iorq->xy->nhead; 2176 iopb->sect = i % iorq->xy->nhead; 2177 /* will resubmit when we come out of remove_iorq */ 2178 return (XY_ERR_AOK); /* recovered! */ 2179 } 2180 #endif 2181 } 2182 2183 /* 2184 * it isn't a bad144 sector, must be real error! see if we can retry 2185 * it? 2186 */ 2187 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2188 xyc_perror(iorq, iopb, 1); /* inform of error state 2189 * change */ 2190 iorq->lasterror = errnum; 2191 2192 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2193 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2194 iorq->tries++; 2195 iorq->errnum = iopb->errnum = iopb->done = iopb->errs = 0; 2196 /* will resubmit at end of remove_iorq */ 2197 return (XY_ERR_AOK); /* recovered! */ 2198 } 2199 2200 /* failed to recover from this error */ 2201 return (XY_ERR_FAIL); 2202 } 2203 2204 /* 2205 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2206 */ 2207 void 2208 xyc_tick(arg) 2209 void *arg; 2210 2211 { 2212 struct xyc_softc *xycsc = arg; 2213 int lcv, s, reset = 0; 2214 2215 /* reduce ttl for each request if one goes to zero, reset xyc */ 2216 s = splbio(); 2217 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2218 if (xycsc->reqs[lcv].mode == 0 || 2219 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2220 continue; 2221 xycsc->reqs[lcv].ttl--; 2222 if (xycsc->reqs[lcv].ttl == 0) 2223 reset = 1; 2224 } 2225 if (reset) { 2226 printf("%s: watchdog timeout\n", device_xname(&xycsc->sc_dev)); 2227 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2228 } 2229 splx(s); 2230 2231 /* until next time */ 2232 2233 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2234 } 2235 2236 /* 2237 * xyc_ioctlcmd: this function provides a user level interface to the 2238 * controller via ioctl. this allows "format" programs to be written 2239 * in user code, and is also useful for some debugging. we return 2240 * an error code. called at user priority. 2241 * 2242 * XXX missing a few commands (see the 7053 driver for ideas) 2243 */ 2244 int 2245 xyc_ioctlcmd(xy, dev, xio) 2246 struct xy_softc *xy; 2247 dev_t dev; 2248 struct xd_iocmd *xio; 2249 2250 { 2251 int s, rqno, dummy = 0; 2252 char *dvmabuf = NULL, *buf = NULL; 2253 struct xyc_softc *xycsc; 2254 int rseg, error; 2255 bus_dma_segment_t seg; 2256 2257 /* check sanity of requested command */ 2258 2259 switch (xio->cmd) { 2260 2261 case XYCMD_NOP: /* no op: everything should be zero */ 2262 if (xio->subfn || xio->dptr || xio->dlen || 2263 xio->block || xio->sectcnt) 2264 return (EINVAL); 2265 break; 2266 2267 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2268 case XYCMD_WR: 2269 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2270 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2271 return (EINVAL); 2272 break; 2273 2274 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2275 return (EINVAL); 2276 2277 break; 2278 2279 default: 2280 return (EINVAL);/* ??? */ 2281 } 2282 2283 xycsc = xy->parent; 2284 2285 /* create DVMA buffer for request if needed */ 2286 if (xio->dlen) { 2287 bus_addr_t busbuf; 2288 2289 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2290 &seg, &rseg, 2291 xio->dlen, (void **)&buf, 2292 &busbuf)) != 0) { 2293 return (error); 2294 } 2295 dvmabuf = (void *)(u_long)BUS_ADDR_PADDR(busbuf); 2296 2297 if (xio->cmd == XYCMD_WR) { 2298 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2299 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2300 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2301 return (error); 2302 } 2303 } 2304 } 2305 /* do it! */ 2306 2307 error = 0; 2308 s = splbio(); 2309 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2310 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2311 if (rqno == XY_ERR_FAIL) { 2312 error = EIO; 2313 goto done; 2314 } 2315 xio->errnum = xycsc->ciorq->errnum; 2316 xio->tries = xycsc->ciorq->tries; 2317 XYC_DONE(xycsc, dummy); 2318 2319 if (xio->cmd == XYCMD_RD) 2320 error = copyout(buf, xio->dptr, xio->dlen); 2321 2322 done: 2323 splx(s); 2324 if (dvmabuf) { 2325 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2326 xio->dlen, buf); 2327 } 2328 return (error); 2329 } 2330 2331 /* 2332 * xyc_e2str: convert error code number into an error string 2333 */ 2334 const char * 2335 xyc_e2str(no) 2336 int no; 2337 { 2338 switch (no) { 2339 case XY_ERR_FAIL: 2340 return ("Software fatal error"); 2341 case XY_ERR_DERR: 2342 return ("DOUBLE ERROR"); 2343 case XY_ERR_AOK: 2344 return ("Successful completion"); 2345 case XY_ERR_IPEN: 2346 return("Interrupt pending"); 2347 case XY_ERR_BCFL: 2348 return("Busy conflict"); 2349 case XY_ERR_TIMO: 2350 return("Operation timeout"); 2351 case XY_ERR_NHDR: 2352 return("Header not found"); 2353 case XY_ERR_HARD: 2354 return("Hard ECC error"); 2355 case XY_ERR_ICYL: 2356 return("Illegal cylinder address"); 2357 case XY_ERR_ISEC: 2358 return("Illegal sector address"); 2359 case XY_ERR_SMAL: 2360 return("Last sector too small"); 2361 case XY_ERR_SACK: 2362 return("Slave ACK error (non-existent memory)"); 2363 case XY_ERR_CHER: 2364 return("Cylinder and head/header error"); 2365 case XY_ERR_SRTR: 2366 return("Auto-seek retry successful"); 2367 case XY_ERR_WPRO: 2368 return("Write-protect error"); 2369 case XY_ERR_UIMP: 2370 return("Unimplemented command"); 2371 case XY_ERR_DNRY: 2372 return("Drive not ready"); 2373 case XY_ERR_SZER: 2374 return("Sector count zero"); 2375 case XY_ERR_DFLT: 2376 return("Drive faulted"); 2377 case XY_ERR_ISSZ: 2378 return("Illegal sector size"); 2379 case XY_ERR_SLTA: 2380 return("Self test A"); 2381 case XY_ERR_SLTB: 2382 return("Self test B"); 2383 case XY_ERR_SLTC: 2384 return("Self test C"); 2385 case XY_ERR_SOFT: 2386 return("Soft ECC error"); 2387 case XY_ERR_SFOK: 2388 return("Soft ECC error recovered"); 2389 case XY_ERR_IHED: 2390 return("Illegal head"); 2391 case XY_ERR_DSEQ: 2392 return("Disk sequencer error"); 2393 case XY_ERR_SEEK: 2394 return("Seek error"); 2395 default: 2396 return ("Unknown error"); 2397 } 2398 } 2399 2400 int 2401 xyc_entoact(errnum) 2402 2403 int errnum; 2404 2405 { 2406 switch (errnum) { 2407 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2408 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2409 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2410 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2411 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2412 2413 return(XY_ERA_PROG); /* program error ! */ 2414 2415 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2416 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2417 case XY_ERR_SOFT: 2418 2419 return(XY_ERA_HARD); /* hard error, retry */ 2420 2421 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2422 2423 return(XY_ERA_RSET); /* hard error reset */ 2424 2425 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2426 2427 return(XY_ERA_SOFT); /* an FYI error */ 2428 2429 case XY_ERR_WPRO: 2430 2431 return(XY_ERA_WPRO); /* write protect */ 2432 } 2433 2434 return(XY_ERA_PROG); /* ??? */ 2435 } 2436
Indexes created Tue Sep 30 11:09:46 GMT 2025