xy.c revision 1.27
1 /* $NetBSD: xy.c,v 1.27 2000/06/29 19:27:56 fvdl 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 #undef XYC_DEBUG /* full debug */ 54 #undef XYC_DIAG /* extra sanity checks */ 55 #if defined(DIAGNOSTIC) && !defined(XYC_DIAG) 56 #define XYC_DIAG /* link in with master DIAG option */ 57 #endif 58 59 #include <sys/param.h> 60 #include <sys/proc.h> 61 #include <sys/systm.h> 62 #include <sys/kernel.h> 63 #include <sys/file.h> 64 #include <sys/stat.h> 65 #include <sys/ioctl.h> 66 #include <sys/buf.h> 67 #include <sys/uio.h> 68 #include <sys/malloc.h> 69 #include <sys/device.h> 70 #include <sys/disklabel.h> 71 #include <sys/disk.h> 72 #include <sys/syslog.h> 73 #include <sys/dkbad.h> 74 #include <sys/conf.h> 75 76 #include <uvm/uvm_extern.h> 77 78 #include <machine/bus.h> 79 #include <machine/intr.h> 80 81 #if defined(__sparc__) || defined(sun3) 82 #include <dev/sun/disklabel.h> 83 #endif 84 85 #include <dev/vme/vmevar.h> 86 87 #include <dev/vme/xyreg.h> 88 #include <dev/vme/xyvar.h> 89 #include <dev/vme/xio.h> 90 91 #include "locators.h" 92 93 /* 94 * macros 95 */ 96 97 /* 98 * XYC_GO: start iopb ADDR (DVMA addr in a u_long) on XYC 99 */ 100 #define XYC_GO(XYC, ADDR) { \ 101 (XYC)->xyc_addr_lo = ((ADDR) & 0xff); \ 102 (ADDR) = ((ADDR) >> 8); \ 103 (XYC)->xyc_addr_hi = ((ADDR) & 0xff); \ 104 (ADDR) = ((ADDR) >> 8); \ 105 (XYC)->xyc_reloc_lo = ((ADDR) & 0xff); \ 106 (ADDR) = ((ADDR) >> 8); \ 107 (XYC)->xyc_reloc_hi = (ADDR); \ 108 (XYC)->xyc_csr = XYC_GBSY; /* go! */ \ 109 } 110 111 /* 112 * XYC_DONE: don't need IORQ, get error code and free (done after xyc_cmd) 113 */ 114 115 #define XYC_DONE(SC,ER) { \ 116 if ((ER) == XY_ERR_AOK) { \ 117 (ER) = (SC)->ciorq->errno; \ 118 (SC)->ciorq->mode = XY_SUB_FREE; \ 119 wakeup((SC)->ciorq); \ 120 } \ 121 } 122 123 /* 124 * XYC_ADVANCE: advance iorq's pointers by a number of sectors 125 */ 126 127 #define XYC_ADVANCE(IORQ, N) { \ 128 if (N) { \ 129 (IORQ)->sectcnt -= (N); \ 130 (IORQ)->blockno += (N); \ 131 (IORQ)->dbuf += ((N)*XYFM_BPS); \ 132 } \ 133 } 134 135 /* 136 * note - addresses you can sleep on: 137 * [1] & of xy_softc's "state" (waiting for a chance to attach a drive) 138 * [2] & an iorq (waiting for an XY_SUB_WAIT iorq to finish) 139 */ 140 141 142 /* 143 * function prototypes 144 * "xyc_*" functions are internal, all others are external interfaces 145 */ 146 147 extern int pil_to_vme[]; /* from obio.c */ 148 149 /* internals */ 150 struct xy_iopb *xyc_chain __P((struct xyc_softc *, struct xy_iorq *)); 151 int xyc_cmd __P((struct xyc_softc *, int, int, int, int, int, char *, int)); 152 char *xyc_e2str __P((int)); 153 int xyc_entoact __P((int)); 154 int xyc_error __P((struct xyc_softc *, struct xy_iorq *, 155 struct xy_iopb *, int)); 156 int xyc_ioctlcmd __P((struct xy_softc *, dev_t dev, struct xd_iocmd *)); 157 void xyc_perror __P((struct xy_iorq *, struct xy_iopb *, int)); 158 int xyc_piodriver __P((struct xyc_softc *, struct xy_iorq *)); 159 int xyc_remove_iorq __P((struct xyc_softc *)); 160 int xyc_reset __P((struct xyc_softc *, int, struct xy_iorq *, int, 161 struct xy_softc *)); 162 inline void xyc_rqinit __P((struct xy_iorq *, struct xyc_softc *, 163 struct xy_softc *, int, u_long, int, 164 caddr_t, struct buf *)); 165 void xyc_rqtopb __P((struct xy_iorq *, struct xy_iopb *, int, int)); 166 void xyc_start __P((struct xyc_softc *, struct xy_iorq *)); 167 int xyc_startbuf __P((struct xyc_softc *, struct xy_softc *, struct buf *)); 168 int xyc_submit_iorq __P((struct xyc_softc *, struct xy_iorq *, int)); 169 void xyc_tick __P((void *)); 170 int xyc_unbusy __P((struct xyc *, int)); 171 void xyc_xyreset __P((struct xyc_softc *, struct xy_softc *)); 172 int xy_dmamem_alloc(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 173 int *, bus_size_t, caddr_t *, bus_addr_t *); 174 void xy_dmamem_free(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, 175 int, bus_size_t, caddr_t); 176 177 /* machine interrupt hook */ 178 int xycintr __P((void *)); 179 180 /* autoconf */ 181 int xycmatch __P((struct device *, struct cfdata *, void *)); 182 void xycattach __P((struct device *, struct device *, void *)); 183 int xymatch __P((struct device *, struct cfdata *, void *)); 184 void xyattach __P((struct device *, struct device *, void *)); 185 static int xyc_probe __P((void *, bus_space_tag_t, bus_space_handle_t)); 186 187 static void xydummystrat __P((struct buf *)); 188 int xygetdisklabel __P((struct xy_softc *, void *)); 189 190 bdev_decl(xy); 191 cdev_decl(xy); 192 193 /* 194 * cfattach's: device driver interface to autoconfig 195 */ 196 197 struct cfattach xyc_ca = { 198 sizeof(struct xyc_softc), xycmatch, xycattach 199 }; 200 201 struct cfattach xy_ca = { 202 sizeof(struct xy_softc), xymatch, xyattach 203 }; 204 205 extern struct cfdriver xy_cd; 206 207 struct xyc_attach_args { /* this is the "aux" args to xyattach */ 208 int driveno; /* unit number */ 209 int fullmode; /* submit mode */ 210 int booting; /* are we booting or not? */ 211 }; 212 213 /* 214 * dkdriver 215 */ 216 217 struct dkdriver xydkdriver = { xystrategy }; 218 219 /* 220 * start: disk label fix code (XXX) 221 */ 222 223 static void *xy_labeldata; 224 225 static void 226 xydummystrat(bp) 227 struct buf *bp; 228 { 229 if (bp->b_bcount != XYFM_BPS) 230 panic("xydummystrat"); 231 bcopy(xy_labeldata, bp->b_data, XYFM_BPS); 232 bp->b_flags |= B_DONE; 233 bp->b_flags &= ~B_BUSY; 234 } 235 236 int 237 xygetdisklabel(xy, b) 238 struct xy_softc *xy; 239 void *b; 240 { 241 char *err; 242 #if defined(__sparc__) || defined(sun3) 243 struct sun_disklabel *sdl; 244 #endif 245 246 /* We already have the label data in `b'; setup for dummy strategy */ 247 xy_labeldata = b; 248 249 /* Required parameter for readdisklabel() */ 250 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; 251 252 err = readdisklabel(MAKEDISKDEV(0, xy->sc_dev.dv_unit, RAW_PART), 253 xydummystrat, 254 xy->sc_dk.dk_label, xy->sc_dk.dk_cpulabel); 255 if (err) { 256 printf("%s: %s\n", xy->sc_dev.dv_xname, err); 257 return(XY_ERR_FAIL); 258 } 259 260 #if defined(__sparc__) || defined(sun3) 261 /* Ok, we have the label; fill in `pcyl' if there's SunOS magic */ 262 sdl = (struct sun_disklabel *)xy->sc_dk.dk_cpulabel->cd_block; 263 if (sdl->sl_magic == SUN_DKMAGIC) { 264 xy->pcyl = sdl->sl_pcylinders; 265 } else 266 #endif 267 { 268 printf("%s: WARNING: no `pcyl' in disk label.\n", 269 xy->sc_dev.dv_xname); 270 xy->pcyl = xy->sc_dk.dk_label->d_ncylinders + 271 xy->sc_dk.dk_label->d_acylinders; 272 printf("%s: WARNING: guessing pcyl=%d (ncyl+acyl)\n", 273 xy->sc_dev.dv_xname, xy->pcyl); 274 } 275 276 xy->ncyl = xy->sc_dk.dk_label->d_ncylinders; 277 xy->acyl = xy->sc_dk.dk_label->d_acylinders; 278 xy->nhead = xy->sc_dk.dk_label->d_ntracks; 279 xy->nsect = xy->sc_dk.dk_label->d_nsectors; 280 xy->sectpercyl = xy->nhead * xy->nsect; 281 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; /* not handled by 282 * sun->bsd */ 283 return(XY_ERR_AOK); 284 } 285 286 /* 287 * end: disk label fix code (XXX) 288 */ 289 290 /* 291 * Shorthand for allocating, mapping and loading a DMA buffer 292 */ 293 int 294 xy_dmamem_alloc(tag, map, seg, nsegp, len, kvap, dmap) 295 bus_dma_tag_t tag; 296 bus_dmamap_t map; 297 bus_dma_segment_t *seg; 298 int *nsegp; 299 bus_size_t len; 300 caddr_t *kvap; 301 bus_addr_t *dmap; 302 { 303 int nseg; 304 int error; 305 306 if ((error = bus_dmamem_alloc(tag, len, 0, 0, 307 seg, 1, &nseg, BUS_DMA_NOWAIT)) != 0) { 308 return (error); 309 } 310 311 if ((error = bus_dmamap_load_raw(tag, map, 312 seg, nseg, len, BUS_DMA_NOWAIT)) != 0) { 313 bus_dmamem_free(tag, seg, nseg); 314 return (error); 315 } 316 317 if ((error = bus_dmamem_map(tag, seg, nseg, 318 len, kvap, 319 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 320 bus_dmamap_unload(tag, map); 321 bus_dmamem_free(tag, seg, nseg); 322 return (error); 323 } 324 325 *dmap = map->dm_segs[0].ds_addr; 326 *nsegp = nseg; 327 return (0); 328 } 329 330 void 331 xy_dmamem_free(tag, map, seg, nseg, len, kva) 332 bus_dma_tag_t tag; 333 bus_dmamap_t map; 334 bus_dma_segment_t *seg; 335 int nseg; 336 bus_size_t len; 337 caddr_t kva; 338 { 339 340 bus_dmamap_unload(tag, map); 341 bus_dmamem_unmap(tag, kva, len); 342 bus_dmamem_free(tag, seg, nseg); 343 } 344 345 346 /* 347 * a u t o c o n f i g f u n c t i o n s 348 */ 349 350 /* 351 * xycmatch: determine if xyc is present or not. we do a 352 * soft reset to detect the xyc. 353 */ 354 int 355 xyc_probe(arg, tag, handle) 356 void *arg; 357 bus_space_tag_t tag; 358 bus_space_handle_t handle; 359 { 360 struct xyc *xyc = (void *)handle; /* XXX */ 361 362 return ((xyc_unbusy(xyc, XYC_RESETUSEC) != XY_ERR_FAIL) ? 0 : EIO); 363 } 364 365 int xycmatch(parent, cf, aux) 366 struct device *parent; 367 struct cfdata *cf; 368 void *aux; 369 { 370 struct vme_attach_args *va = aux; 371 vme_chipset_tag_t ct = va->va_vct; 372 vme_am_t mod; 373 int error; 374 375 mod = 0x2d; /* VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */ 376 if (vme_space_alloc(va->va_vct, va->r[0].offset, sizeof(struct xyc), 377 mod)) 378 return (0); 379 error = vme_probe(ct, va->r[0].offset, sizeof(struct xyc), 380 mod, VME_D32, xyc_probe, 0); 381 vme_space_free(va->va_vct, va->r[0].offset, sizeof(struct xyc), mod); 382 383 return (error == 0); 384 } 385 386 /* 387 * xycattach: attach controller 388 */ 389 void 390 xycattach(parent, self, aux) 391 struct device *parent, *self; 392 void *aux; 393 394 { 395 struct vme_attach_args *va = aux; 396 vme_chipset_tag_t ct = va->va_vct; 397 bus_space_tag_t bt; 398 bus_space_handle_t bh; 399 vme_intr_handle_t ih; 400 vme_am_t mod; 401 struct xyc_softc *xyc = (void *) self; 402 struct xyc_attach_args xa; 403 int lcv, res, error; 404 bus_dma_segment_t seg; 405 int rseg; 406 vme_mapresc_t resc; 407 408 /* get addressing and intr level stuff from autoconfig and load it 409 * into our xyc_softc. */ 410 411 mod = 0x2d; /* VME_AM_A16 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA */ 412 413 if (vme_space_alloc(va->va_vct, va->r[0].offset, sizeof(struct xyc), 414 mod)) 415 panic("xyc: vme alloc"); 416 if (vme_space_map(ct, va->r[0].offset, sizeof(struct xyc), 417 mod, VME_D32, 0, &bt, &bh, &resc) != 0) 418 panic("xyc: vme_map"); 419 420 xyc->xyc = (struct xyc *) bh; /* XXX */ 421 xyc->ipl = va->ilevel; 422 xyc->vector = va->ivector; 423 xyc->no_ols = 0; /* XXX should be from config */ 424 425 for (lcv = 0; lcv < XYC_MAXDEV; lcv++) 426 xyc->sc_drives[lcv] = (struct xy_softc *) 0; 427 428 /* 429 * allocate and zero buffers 430 * check boundaries of the KVA's ... all IOPBs must reside in 431 * the same 64K region. 432 */ 433 434 /* Get DMA handle for misc. transfers */ 435 if ((error = bus_dmamap_create( 436 xyc->dmatag, 437 MAXPHYS, 438 1, /* nsegments */ 439 MAXPHYS, 440 0, /* boundary */ 441 BUS_DMA_NOWAIT, 442 &xyc->auxmap)) != 0) { 443 printf("%s: DMA buffer map create error %d\n", 444 xyc->sc_dev.dv_xname, error); 445 return; 446 } 447 448 /* Get DMA handle for mapping iorq descriptors */ 449 if ((error = bus_dmamap_create( 450 xyc->dmatag, 451 XYC_MAXIOPB * sizeof(struct xy_iopb), 452 1, /* nsegments */ 453 XYC_MAXIOPB * sizeof(struct xy_iopb), 454 64*1024, /* boundary */ 455 BUS_DMA_NOWAIT, 456 &xyc->iopmap)) != 0) { 457 printf("%s: DMA buffer map create error %d\n", 458 xyc->sc_dev.dv_xname, error); 459 return; 460 } 461 462 /* Get DMA buffer for iorq descriptors */ 463 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->iopmap, &seg, &rseg, 464 XYC_MAXIOPB * sizeof(struct xy_iopb), 465 (caddr_t *)&xyc->iopbase, 466 (bus_addr_t *)&xyc->dvmaiopb)) != 0) { 467 printf("%s: DMA buffer alloc error %d\n", 468 xyc->sc_dev.dv_xname, error); 469 return; 470 } 471 472 bzero(xyc->iopbase, XYC_MAXIOPB * sizeof(struct xy_iopb)); 473 474 xyc->reqs = (struct xy_iorq *) 475 malloc(XYC_MAXIOPB * sizeof(struct xy_iorq), M_DEVBUF, M_NOWAIT); 476 if (xyc->reqs == NULL) 477 panic("xyc malloc"); 478 bzero(xyc->reqs, XYC_MAXIOPB * sizeof(struct xy_iorq)); 479 480 /* 481 * init iorq to iopb pointers, and non-zero fields in the 482 * iopb which never change. 483 */ 484 485 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 486 xyc->xy_chain[lcv] = NULL; 487 xyc->reqs[lcv].iopb = &xyc->iopbase[lcv]; 488 xyc->reqs[lcv].dmaiopb = &xyc->dvmaiopb[lcv]; 489 xyc->iopbase[lcv].asr = 1; /* always the same */ 490 xyc->iopbase[lcv].eef = 1; /* always the same */ 491 xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */ 492 xyc->iopbase[lcv].aud = 1; /* always the same */ 493 xyc->iopbase[lcv].relo = 1; /* always the same */ 494 xyc->iopbase[lcv].thro = XY_THRO;/* always the same */ 495 496 error = bus_dmamap_create( 497 xyc->dmatag, 498 MAXPHYS, /* size */ 499 1, /* nsegments */ 500 MAXPHYS, /* maxsegsz */ 501 0, /* boundary */ 502 BUS_DMA_NOWAIT, 503 &xyc->reqs[lcv].dmamap); 504 if (error) { 505 printf("%s: DMA buffer map create error %d\n", 506 xyc->sc_dev.dv_xname, error); 507 return; 508 } 509 } 510 xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */ 511 xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */ 512 xyc->xy_hand = 0; 513 514 /* read controller parameters and insure we have a 450/451 */ 515 516 error = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL); 517 res = xyc->ciopb->ctyp; 518 XYC_DONE(xyc, error); 519 if (res != XYCT_450) { 520 if (error) 521 printf(": %s: ", xyc_e2str(error)); 522 printf(": doesn't identify as a 450/451\n"); 523 return; 524 } 525 printf(": Xylogics 450/451"); 526 if (xyc->no_ols) 527 printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */ 528 printf("\n"); 529 if (error) { 530 printf("%s: error: %s\n", xyc->sc_dev.dv_xname, 531 xyc_e2str(error)); 532 return; 533 } 534 if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) { 535 printf("%s: 24 bit addressing turned off\n", 536 xyc->sc_dev.dv_xname); 537 printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n"); 538 printf("to enable 24 bit mode and this driver\n"); 539 return; 540 } 541 542 /* link in interrupt with higher level software */ 543 vme_intr_map(ct, va->ivector, va->ilevel, &ih); 544 vme_intr_establish(ct, ih, IPL_BIO, xycintr, xyc); 545 evcnt_attach_dynamic(&xyc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 546 xyc->sc_dev.dv_xname, "intr"); 547 548 callout_init(&xyc->sc_tick_ch); 549 550 /* now we must look for disks using autoconfig */ 551 xa.fullmode = XY_SUB_POLL; 552 xa.booting = 1; 553 554 for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++) 555 (void) config_found(self, (void *) &xa, NULL); 556 557 /* start the watchdog clock */ 558 callout_reset(&xyc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xyc); 559 560 } 561 562 /* 563 * xymatch: probe for disk. 564 * 565 * note: we almost always say disk is present. this allows us to 566 * spin up and configure a disk after the system is booted (we can 567 * call xyattach!). 568 */ 569 int 570 xymatch(parent, cf, aux) 571 struct device *parent; 572 struct cfdata *cf; 573 void *aux; 574 { 575 struct xyc_attach_args *xa = aux; 576 577 /* looking for autoconf wildcard or exact match */ 578 579 if (cf->cf_loc[XYCCF_DRIVE] != XYCCF_DRIVE_DEFAULT && 580 cf->cf_loc[XYCCF_DRIVE] != xa->driveno) 581 return 0; 582 583 return 1; 584 585 } 586 587 /* 588 * xyattach: attach a disk. this can be called from autoconf and also 589 * from xyopen/xystrategy. 590 */ 591 void 592 xyattach(parent, self, aux) 593 struct device *parent, *self; 594 void *aux; 595 596 { 597 struct xy_softc *xy = (void *) self, *oxy; 598 struct xyc_softc *xyc = (void *) parent; 599 struct xyc_attach_args *xa = aux; 600 int spt, mb, blk, lcv, fmode, s = 0, newstate; 601 struct dkbad *dkb; 602 int rseg, error; 603 bus_dma_segment_t seg; 604 caddr_t dmaddr; 605 caddr_t buf; 606 607 /* 608 * Always re-initialize the disk structure. We want statistics 609 * to start with a clean slate. 610 */ 611 bzero(&xy->sc_dk, sizeof(xy->sc_dk)); 612 xy->sc_dk.dk_driver = &xydkdriver; 613 xy->sc_dk.dk_name = xy->sc_dev.dv_xname; 614 615 /* if booting, init the xy_softc */ 616 617 if (xa->booting) { 618 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 619 xy->flags = 0; 620 xy->parent = xyc; 621 622 /* init queue of waiting bufs */ 623 624 BUFQ_INIT(&xy->xyq); 625 626 xy->xyrq = &xyc->reqs[xa->driveno]; 627 628 } 629 xy->xy_drive = xa->driveno; 630 fmode = xa->fullmode; 631 xyc->sc_drives[xa->driveno] = xy; 632 633 /* if not booting, make sure we are the only process in the attach for 634 * this drive. if locked out, sleep on it. */ 635 636 if (!xa->booting) { 637 s = splbio(); 638 while (xy->state == XY_DRIVE_ATTACHING) { 639 if (tsleep(&xy->state, PRIBIO, "xyattach", 0)) { 640 splx(s); 641 return; 642 } 643 } 644 printf("%s at %s", 645 xy->sc_dev.dv_xname, xy->parent->sc_dev.dv_xname); 646 } 647 648 /* we now have control */ 649 xy->state = XY_DRIVE_ATTACHING; 650 newstate = XY_DRIVE_UNKNOWN; 651 652 buf = NULL; 653 if ((error = xy_dmamem_alloc(xyc->dmatag, xyc->auxmap, &seg, &rseg, 654 XYFM_BPS, 655 (caddr_t *)&buf, 656 (bus_addr_t *)&dmaddr)) != 0) { 657 printf("%s: DMA buffer alloc error %d\n", 658 xyc->sc_dev.dv_xname, error); 659 return; 660 } 661 662 /* first try and reset the drive */ 663 error = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fmode); 664 XYC_DONE(xyc, error); 665 if (error == XY_ERR_DNRY) { 666 printf(" drive %d: off-line\n", xa->driveno); 667 goto done; 668 } 669 if (error) { 670 printf(": ERROR 0x%02x (%s)\n", error, xyc_e2str(error)); 671 goto done; 672 } 673 printf(" drive %d: ready", xa->driveno); 674 675 /* 676 * now set drive parameters (to semi-bogus values) so we can read the 677 * disk label. 678 */ 679 xy->pcyl = xy->ncyl = 1; 680 xy->acyl = 0; 681 xy->nhead = 1; 682 xy->nsect = 1; 683 xy->sectpercyl = 1; 684 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 685 xy->dkb.bt_bad[lcv].bt_cyl = 686 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 687 688 /* read disk label */ 689 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 690 xy->drive_type++) { 691 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 692 dmaddr, fmode); 693 XYC_DONE(xyc, error); 694 if (error == XY_ERR_AOK) break; 695 } 696 697 if (error != XY_ERR_AOK) { 698 printf("\n%s: reading disk label failed: %s\n", 699 xy->sc_dev.dv_xname, xyc_e2str(error)); 700 goto done; 701 } 702 printf(" (drive type %d)\n", xy->drive_type); 703 704 newstate = XY_DRIVE_NOLABEL; 705 706 xy->hw_spt = spt = 0; /* XXX needed ? */ 707 /* Attach the disk: must be before getdisklabel to malloc label */ 708 disk_attach(&xy->sc_dk); 709 710 if (xygetdisklabel(xy, buf) != XY_ERR_AOK) 711 goto done; 712 713 /* inform the user of what is up */ 714 printf("%s: <%s>, pcyl %d\n", xy->sc_dev.dv_xname, 715 buf, xy->pcyl); 716 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 717 printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sec\n", 718 xy->sc_dev.dv_xname, mb, xy->ncyl, xy->nhead, xy->nsect, 719 XYFM_BPS); 720 721 /* 722 * 450/451 stupidity: the drive type is encoded into the format 723 * of the disk. the drive type in the IOPB must match the drive 724 * type in the format, or you will not be able to do I/O to the 725 * disk (you get header not found errors). if you have two drives 726 * of different sizes that have the same drive type in their 727 * formatting then you are out of luck. 728 * 729 * this problem was corrected in the 753/7053. 730 */ 731 732 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 733 oxy = xyc->sc_drives[lcv]; 734 if (oxy == NULL || oxy == xy) continue; 735 if (oxy->drive_type != xy->drive_type) continue; 736 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 737 xy->nhead != oxy->nhead) { 738 printf("%s: %s and %s must be the same size!\n", 739 xyc->sc_dev.dv_xname, xy->sc_dev.dv_xname, 740 oxy->sc_dev.dv_xname); 741 panic("xy drive size mismatch"); 742 } 743 } 744 745 746 /* now set the real drive parameters! */ 747 748 blk = (xy->nsect - 1) + 749 ((xy->nhead - 1) * xy->nsect) + 750 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 751 error = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fmode); 752 XYC_DONE(xyc, error); 753 if (error) { 754 printf("%s: write drive size failed: %s\n", 755 xy->sc_dev.dv_xname, xyc_e2str(error)); 756 goto done; 757 } 758 newstate = XY_DRIVE_ONLINE; 759 760 /* 761 * read bad144 table. this table resides on the first sector of the 762 * last track of the disk (i.e. second cyl of "acyl" area). 763 */ 764 765 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 766 /* last cyl */ 767 (xy->nhead - 1) * xy->nsect; /* last head */ 768 error = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 769 dmaddr, fmode); 770 XYC_DONE(xyc, error); 771 if (error) { 772 printf("%s: reading bad144 failed: %s\n", 773 xy->sc_dev.dv_xname, xyc_e2str(error)); 774 goto done; 775 } 776 777 /* check dkbad for sanity */ 778 dkb = (struct dkbad *) buf; 779 for (lcv = 0; lcv < 126; lcv++) { 780 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 781 dkb->bt_bad[lcv].bt_cyl == 0) && 782 dkb->bt_bad[lcv].bt_trksec == 0xffff) 783 continue; /* blank */ 784 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 785 break; 786 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 787 break; 788 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 789 break; 790 } 791 if (lcv != 126) { 792 printf("%s: warning: invalid bad144 sector!\n", 793 xy->sc_dev.dv_xname); 794 } else { 795 bcopy(buf, &xy->dkb, XYFM_BPS); 796 } 797 798 done: 799 if (buf != NULL) { 800 xy_dmamem_free(xyc->dmatag, xyc->auxmap, 801 &seg, rseg, XYFM_BPS, buf); 802 } 803 804 xy->state = newstate; 805 if (!xa->booting) { 806 wakeup(&xy->state); 807 splx(s); 808 } 809 } 810 811 /* 812 * end of autoconfig functions 813 */ 814 815 /* 816 * { b , c } d e v s w f u n c t i o n s 817 */ 818 819 /* 820 * xyclose: close device 821 */ 822 int 823 xyclose(dev, flag, fmt, p) 824 dev_t dev; 825 int flag, fmt; 826 struct proc *p; 827 828 { 829 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 830 int part = DISKPART(dev); 831 832 /* clear mask bits */ 833 834 switch (fmt) { 835 case S_IFCHR: 836 xy->sc_dk.dk_copenmask &= ~(1 << part); 837 break; 838 case S_IFBLK: 839 xy->sc_dk.dk_bopenmask &= ~(1 << part); 840 break; 841 } 842 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 843 844 return 0; 845 } 846 847 /* 848 * xydump: crash dump system 849 */ 850 int 851 xydump(dev, blkno, va, size) 852 dev_t dev; 853 daddr_t blkno; 854 caddr_t va; 855 size_t size; 856 { 857 int unit, part; 858 struct xy_softc *xy; 859 860 unit = DISKUNIT(dev); 861 if (unit >= xy_cd.cd_ndevs) 862 return ENXIO; 863 part = DISKPART(dev); 864 865 xy = xy_cd.cd_devs[unit]; 866 867 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 868 'a' + part); 869 870 return ENXIO; 871 872 /* outline: globals: "dumplo" == sector number of partition to start 873 * dump at (convert to physical sector with partition table) 874 * "dumpsize" == size of dump in clicks "physmem" == size of physical 875 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 876 * physmem) 877 * 878 * dump a copy of physical memory to the dump device starting at sector 879 * "dumplo" in the swap partition (make sure > 0). map in pages as 880 * we go. use polled I/O. 881 * 882 * XXX how to handle NON_CONTIG? */ 883 884 } 885 886 /* 887 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 888 */ 889 int 890 xyioctl(dev, command, addr, flag, p) 891 dev_t dev; 892 u_long command; 893 caddr_t addr; 894 int flag; 895 struct proc *p; 896 897 { 898 struct xy_softc *xy; 899 struct xd_iocmd *xio; 900 int error, s, unit; 901 902 unit = DISKUNIT(dev); 903 904 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 905 return (ENXIO); 906 907 /* switch on ioctl type */ 908 909 switch (command) { 910 case DIOCSBAD: /* set bad144 info */ 911 if ((flag & FWRITE) == 0) 912 return EBADF; 913 s = splbio(); 914 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 915 splx(s); 916 return 0; 917 918 case DIOCGDINFO: /* get disk label */ 919 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 920 return 0; 921 922 case DIOCGPART: /* get partition info */ 923 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 924 ((struct partinfo *) addr)->part = 925 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 926 return 0; 927 928 case DIOCSDINFO: /* set disk label */ 929 if ((flag & FWRITE) == 0) 930 return EBADF; 931 error = setdisklabel(xy->sc_dk.dk_label, 932 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 933 xy->sc_dk.dk_cpulabel); 934 if (error == 0) { 935 if (xy->state == XY_DRIVE_NOLABEL) 936 xy->state = XY_DRIVE_ONLINE; 937 } 938 return error; 939 940 case DIOCWLABEL: /* change write status of disk label */ 941 if ((flag & FWRITE) == 0) 942 return EBADF; 943 if (*(int *) addr) 944 xy->flags |= XY_WLABEL; 945 else 946 xy->flags &= ~XY_WLABEL; 947 return 0; 948 949 case DIOCWDINFO: /* write disk label */ 950 if ((flag & FWRITE) == 0) 951 return EBADF; 952 error = setdisklabel(xy->sc_dk.dk_label, 953 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 954 xy->sc_dk.dk_cpulabel); 955 if (error == 0) { 956 if (xy->state == XY_DRIVE_NOLABEL) 957 xy->state = XY_DRIVE_ONLINE; 958 959 /* Simulate opening partition 0 so write succeeds. */ 960 xy->sc_dk.dk_openmask |= (1 << 0); 961 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 962 xystrategy, xy->sc_dk.dk_label, 963 xy->sc_dk.dk_cpulabel); 964 xy->sc_dk.dk_openmask = 965 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 966 } 967 return error; 968 969 case DIOSXDCMD: 970 xio = (struct xd_iocmd *) addr; 971 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 972 return (error); 973 return (xyc_ioctlcmd(xy, dev, xio)); 974 975 default: 976 return ENOTTY; 977 } 978 } 979 980 /* 981 * xyopen: open drive 982 */ 983 984 int 985 xyopen(dev, flag, fmt, p) 986 dev_t dev; 987 int flag, fmt; 988 struct proc *p; 989 { 990 int unit, part; 991 struct xy_softc *xy; 992 struct xyc_attach_args xa; 993 994 /* first, could it be a valid target? */ 995 996 unit = DISKUNIT(dev); 997 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 998 return (ENXIO); 999 part = DISKPART(dev); 1000 1001 /* do we need to attach the drive? */ 1002 1003 if (xy->state == XY_DRIVE_UNKNOWN) { 1004 xa.driveno = xy->xy_drive; 1005 xa.fullmode = XY_SUB_WAIT; 1006 xa.booting = 0; 1007 xyattach((struct device *) xy->parent, 1008 (struct device *) xy, &xa); 1009 if (xy->state == XY_DRIVE_UNKNOWN) { 1010 return (EIO); 1011 } 1012 } 1013 /* check for partition */ 1014 1015 if (part != RAW_PART && 1016 (part >= xy->sc_dk.dk_label->d_npartitions || 1017 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 1018 return (ENXIO); 1019 } 1020 /* set open masks */ 1021 1022 switch (fmt) { 1023 case S_IFCHR: 1024 xy->sc_dk.dk_copenmask |= (1 << part); 1025 break; 1026 case S_IFBLK: 1027 xy->sc_dk.dk_bopenmask |= (1 << part); 1028 break; 1029 } 1030 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 1031 1032 return 0; 1033 } 1034 1035 int 1036 xyread(dev, uio, flags) 1037 dev_t dev; 1038 struct uio *uio; 1039 int flags; 1040 { 1041 1042 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 1043 } 1044 1045 int 1046 xywrite(dev, uio, flags) 1047 dev_t dev; 1048 struct uio *uio; 1049 int flags; 1050 { 1051 1052 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 1053 } 1054 1055 1056 /* 1057 * xysize: return size of a partition for a dump 1058 */ 1059 1060 int 1061 xysize(dev) 1062 dev_t dev; 1063 1064 { 1065 struct xy_softc *xysc; 1066 int unit, part, size, omask; 1067 1068 /* valid unit? */ 1069 unit = DISKUNIT(dev); 1070 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 1071 return (-1); 1072 1073 part = DISKPART(dev); 1074 omask = xysc->sc_dk.dk_openmask & (1 << part); 1075 1076 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 1077 return (-1); 1078 1079 /* do it */ 1080 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 1081 size = -1; /* only give valid size for swap partitions */ 1082 else 1083 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 1084 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 1085 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 1086 return (-1); 1087 return (size); 1088 } 1089 1090 /* 1091 * xystrategy: buffering system interface to xy. 1092 */ 1093 1094 void 1095 xystrategy(bp) 1096 struct buf *bp; 1097 1098 { 1099 struct xy_softc *xy; 1100 int s, unit; 1101 struct xyc_attach_args xa; 1102 struct disklabel *lp; 1103 daddr_t blkno; 1104 1105 unit = DISKUNIT(bp->b_dev); 1106 1107 /* check for live device */ 1108 1109 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 1110 bp->b_blkno < 0 || 1111 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 1112 bp->b_error = EINVAL; 1113 goto bad; 1114 } 1115 /* do we need to attach the drive? */ 1116 1117 if (xy->state == XY_DRIVE_UNKNOWN) { 1118 xa.driveno = xy->xy_drive; 1119 xa.fullmode = XY_SUB_WAIT; 1120 xa.booting = 0; 1121 xyattach((struct device *)xy->parent, (struct device *)xy, &xa); 1122 if (xy->state == XY_DRIVE_UNKNOWN) { 1123 bp->b_error = EIO; 1124 goto bad; 1125 } 1126 } 1127 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1128 /* no I/O to unlabeled disks, unless raw partition */ 1129 bp->b_error = EIO; 1130 goto bad; 1131 } 1132 /* short circuit zero length request */ 1133 1134 if (bp->b_bcount == 0) 1135 goto done; 1136 1137 /* check bounds with label (disksubr.c). Determine the size of the 1138 * transfer, and make sure it is within the boundaries of the 1139 * partition. Adjust transfer if needed, and signal errors or early 1140 * completion. */ 1141 1142 lp = xy->sc_dk.dk_label; 1143 1144 if (bounds_check_with_label(bp, lp, 1145 (xy->flags & XY_WLABEL) != 0) <= 0) 1146 goto done; 1147 1148 /* 1149 * Now convert the block number to absolute and put it in 1150 * terms of the device's logical block size. 1151 */ 1152 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 1153 if (DISKPART(bp->b_dev) != RAW_PART) 1154 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 1155 1156 bp->b_rawblkno = blkno; 1157 1158 /* 1159 * now we know we have a valid buf structure that we need to do I/O 1160 * on. 1161 */ 1162 s = splbio(); /* protect the queues */ 1163 1164 disksort_blkno(&xy->xyq, bp); 1165 1166 /* start 'em up */ 1167 1168 xyc_start(xy->parent, NULL); 1169 1170 /* done! */ 1171 1172 splx(s); 1173 return; 1174 1175 bad: /* tells upper layers we have an error */ 1176 bp->b_flags |= B_ERROR; 1177 done: /* tells upper layers we are done with this 1178 * buf */ 1179 bp->b_resid = bp->b_bcount; 1180 biodone(bp); 1181 } 1182 /* 1183 * end of {b,c}devsw functions 1184 */ 1185 1186 /* 1187 * i n t e r r u p t f u n c t i o n 1188 * 1189 * xycintr: hardware interrupt. 1190 */ 1191 int 1192 xycintr(v) 1193 void *v; 1194 1195 { 1196 struct xyc_softc *xycsc = v; 1197 1198 /* kick the event counter */ 1199 1200 xycsc->sc_intrcnt.ev_count++; 1201 1202 /* remove as many done IOPBs as possible */ 1203 1204 xyc_remove_iorq(xycsc); 1205 1206 /* start any iorq's already waiting */ 1207 1208 xyc_start(xycsc, NULL); 1209 1210 return (1); 1211 } 1212 /* 1213 * end of interrupt function 1214 */ 1215 1216 /* 1217 * i n t e r n a l f u n c t i o n s 1218 */ 1219 1220 /* 1221 * xyc_rqinit: fill out the fields of an I/O request 1222 */ 1223 1224 inline void 1225 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1226 struct xy_iorq *rq; 1227 struct xyc_softc *xyc; 1228 struct xy_softc *xy; 1229 int md; 1230 u_long blk; 1231 int cnt; 1232 caddr_t db; 1233 struct buf *bp; 1234 { 1235 rq->xyc = xyc; 1236 rq->xy = xy; 1237 rq->ttl = XYC_MAXTTL + 10; 1238 rq->mode = md; 1239 rq->tries = rq->errno = rq->lasterror = 0; 1240 rq->blockno = blk; 1241 rq->sectcnt = cnt; 1242 rq->dbuf = db; 1243 rq->buf = bp; 1244 } 1245 1246 /* 1247 * xyc_rqtopb: load up an IOPB based on an iorq 1248 */ 1249 1250 void 1251 xyc_rqtopb(iorq, iopb, cmd, subfun) 1252 struct xy_iorq *iorq; 1253 struct xy_iopb *iopb; 1254 int cmd, subfun; 1255 1256 { 1257 u_long block, dp; 1258 1259 /* normal IOPB case, standard stuff */ 1260 1261 /* chain bit handled later */ 1262 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1263 iopb->com = cmd; 1264 iopb->errno = 0; 1265 iopb->errs = 0; 1266 iopb->done = 0; 1267 if (iorq->xy) { 1268 iopb->unit = iorq->xy->xy_drive; 1269 iopb->dt = iorq->xy->drive_type; 1270 } else { 1271 iopb->unit = 0; 1272 iopb->dt = 0; 1273 } 1274 block = iorq->blockno; 1275 if (iorq->xy == NULL || block == 0) { 1276 iopb->sect = iopb->head = iopb->cyl = 0; 1277 } else { 1278 iopb->sect = block % iorq->xy->nsect; 1279 block = block / iorq->xy->nsect; 1280 iopb->head = block % iorq->xy->nhead; 1281 block = block / iorq->xy->nhead; 1282 iopb->cyl = block; 1283 } 1284 iopb->scnt = iorq->sectcnt; 1285 dp = (u_long) iorq->dbuf; 1286 if (iorq->dbuf == NULL) { 1287 iopb->dataa = 0; 1288 iopb->datar = 0; 1289 } else { 1290 iopb->dataa = (dp & 0xffff); 1291 iopb->datar = ((dp & 0xff0000) >> 16); 1292 } 1293 iopb->subfn = subfun; 1294 } 1295 1296 1297 /* 1298 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1299 */ 1300 1301 int 1302 xyc_unbusy(xyc, del) 1303 1304 struct xyc *xyc; 1305 int del; 1306 1307 { 1308 while (del-- > 0) { 1309 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1310 break; 1311 DELAY(1); 1312 } 1313 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1314 } 1315 1316 /* 1317 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1318 * note that NORM requests are handled seperately. 1319 */ 1320 int 1321 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1322 struct xyc_softc *xycsc; 1323 int cmd, subfn, unit, block, scnt; 1324 char *dptr; 1325 int fullmode; 1326 1327 { 1328 int submode = XY_STATE(fullmode); 1329 struct xy_iorq *iorq = xycsc->ciorq; 1330 struct xy_iopb *iopb = xycsc->ciopb; 1331 1332 /* 1333 * is someone else using the control iopq wait for it if we can 1334 */ 1335 start: 1336 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1337 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1338 return(XY_ERR_FAIL); 1339 goto start; 1340 } 1341 1342 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1343 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1344 iorq->mode = XY_SUB_FREE; 1345 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1346 } 1347 1348 /* init iorq/iopb */ 1349 1350 xyc_rqinit(iorq, xycsc, 1351 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1352 fullmode, block, scnt, dptr, NULL); 1353 1354 /* load IOPB from iorq */ 1355 1356 xyc_rqtopb(iorq, iopb, cmd, subfn); 1357 1358 /* submit it for processing */ 1359 1360 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1361 1362 return(XY_ERR_AOK); 1363 } 1364 1365 /* 1366 * xyc_startbuf 1367 * start a buffer for running 1368 */ 1369 1370 int 1371 xyc_startbuf(xycsc, xysc, bp) 1372 struct xyc_softc *xycsc; 1373 struct xy_softc *xysc; 1374 struct buf *bp; 1375 1376 { 1377 int partno, error; 1378 struct xy_iorq *iorq; 1379 struct xy_iopb *iopb; 1380 u_long block; 1381 1382 iorq = xysc->xyrq; 1383 iopb = iorq->iopb; 1384 1385 /* get buf */ 1386 1387 if (bp == NULL) 1388 panic("xyc_startbuf null buf"); 1389 1390 partno = DISKPART(bp->b_dev); 1391 #ifdef XYC_DEBUG 1392 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1393 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1394 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1395 bp->b_bcount, bp->b_data); 1396 #endif 1397 1398 /* 1399 * load request. 1400 * 1401 * note that iorq points to the buffer as mapped into DVMA space, 1402 * where as the bp->b_data points to its non-DVMA mapping. 1403 */ 1404 1405 block = bp->b_rawblkno; 1406 1407 error = bus_dmamap_load(xycsc->dmatag, iorq->dmamap, 1408 bp->b_data, bp->b_bcount, 0, BUS_DMA_NOWAIT); 1409 if (error != 0) { 1410 printf("%s: warning: cannot load DMA map\n", 1411 xycsc->sc_dev.dv_xname); 1412 return (XY_ERR_FAIL); /* XXX: need some sort of 1413 * call-back scheme here? */ 1414 } 1415 1416 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1417 iorq->dmamap->dm_mapsize, (bp->b_flags & B_READ) 1418 ? BUS_DMASYNC_PREREAD 1419 : BUS_DMASYNC_PREWRITE); 1420 1421 /* init iorq and load iopb from it */ 1422 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1423 bp->b_bcount / XYFM_BPS, 1424 (caddr_t)iorq->dmamap->dm_segs[0].ds_addr, 1425 bp); 1426 1427 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1428 1429 /* Instrumentation. */ 1430 disk_busy(&xysc->sc_dk); 1431 1432 return (XY_ERR_AOK); 1433 } 1434 1435 1436 /* 1437 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1438 * if ok. if it fail returns an error code. type is XY_SUB_*. 1439 * 1440 * note: caller frees iorq in all cases except NORM 1441 * 1442 * return value: 1443 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1444 * WAIT: XY_AOK (success), <error-code> (failed) 1445 * POLL: <same as WAIT> 1446 * NOQ : <same as NORM> 1447 * 1448 * there are three sources for i/o requests: 1449 * [1] xystrategy: normal block I/O, using "struct buf" system. 1450 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1451 * [3] open/ioctl: these are I/O requests done in the context of a process, 1452 * and the process should block until they are done. 1453 * 1454 * software state is stored in the iorq structure. each iorq has an 1455 * iopb structure. the hardware understands the iopb structure. 1456 * every command must go through an iopb. a 450 handles one iopb at a 1457 * time, where as a 451 can take them in chains. [the 450 claims it 1458 * can handle chains, but is appears to be buggy...] iopb are allocated 1459 * in DVMA space at boot up time. each disk gets one iopb, and the 1460 * controller gets one (for POLL and WAIT commands). what happens if 1461 * the iopb is busy? for i/o type [1], the buffers are queued at the 1462 * "buff" layer and * picked up later by the interrupt routine. for case 1463 * [2] we can only be blocked if there is a WAIT type I/O request being 1464 * run. since this can only happen when we are crashing, we wait a sec 1465 * and then steal the IOPB. for case [3] the process can sleep 1466 * on the iorq free list until some iopbs are avaliable. 1467 */ 1468 1469 1470 int 1471 xyc_submit_iorq(xycsc, iorq, type) 1472 struct xyc_softc *xycsc; 1473 struct xy_iorq *iorq; 1474 int type; 1475 1476 { 1477 struct xy_iopb *dmaiopb; 1478 1479 #ifdef XYC_DEBUG 1480 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1481 xycsc->sc_dev.dv_xname, iorq, type); 1482 #endif 1483 1484 /* first check and see if controller is busy */ 1485 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1486 #ifdef XYC_DEBUG 1487 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1488 #endif 1489 if (type == XY_SUB_NOQ) 1490 return (XY_ERR_FAIL); /* failed */ 1491 switch (type) { 1492 case XY_SUB_NORM: 1493 return XY_ERR_AOK; /* success */ 1494 case XY_SUB_WAIT: 1495 while (iorq->iopb->done == 0) { 1496 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1497 } 1498 return (iorq->errno); 1499 case XY_SUB_POLL: /* steal controller */ 1500 (void)xycsc->xyc->xyc_rsetup; /* RESET */ 1501 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1502 panic("xyc_submit_iorq: stuck xyc"); 1503 printf("%s: stole controller\n", 1504 xycsc->sc_dev.dv_xname); 1505 break; 1506 default: 1507 panic("xyc_submit_iorq adding"); 1508 } 1509 } 1510 1511 dmaiopb = xyc_chain(xycsc, iorq); /* build chain */ 1512 if (dmaiopb == NULL) { /* nothing doing? */ 1513 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1514 return(XY_ERR_AOK); 1515 panic("xyc_submit_iorq: xyc_chain failed!\n"); 1516 } 1517 1518 XYC_GO(xycsc->xyc, (u_long)dmaiopb); 1519 1520 /* command now running, wrap it up */ 1521 switch (type) { 1522 case XY_SUB_NORM: 1523 case XY_SUB_NOQ: 1524 return (XY_ERR_AOK); /* success */ 1525 case XY_SUB_WAIT: 1526 while (iorq->iopb->done == 0) { 1527 (void) tsleep(iorq, PRIBIO, "xyciorq", 0); 1528 } 1529 return (iorq->errno); 1530 case XY_SUB_POLL: 1531 return (xyc_piodriver(xycsc, iorq)); 1532 default: 1533 panic("xyc_submit_iorq wrap up"); 1534 } 1535 panic("xyc_submit_iorq"); 1536 return 0; /* not reached */ 1537 } 1538 1539 1540 /* 1541 * xyc_chain: build a chain. return dvma address of first element in 1542 * the chain. iorq != NULL: means we only want that item on the chain. 1543 */ 1544 1545 struct xy_iopb * 1546 xyc_chain(xycsc, iorq) 1547 struct xyc_softc *xycsc; 1548 struct xy_iorq *iorq; 1549 1550 { 1551 int togo, chain, hand; 1552 1553 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1554 1555 /* 1556 * promote control IOPB to the top 1557 */ 1558 if (iorq == NULL) { 1559 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1560 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1561 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1562 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1563 } 1564 1565 /* 1566 * special case: if iorq != NULL then we have a POLL or WAIT request. 1567 * we let these take priority and do them first. 1568 */ 1569 if (iorq) { 1570 xycsc->xy_chain[0] = iorq; 1571 iorq->iopb->chen = 0; 1572 return(iorq->dmaiopb); 1573 } 1574 1575 /* 1576 * NORM case: do round robin and maybe chain (if allowed and possible) 1577 */ 1578 chain = 0; 1579 hand = xycsc->xy_hand; 1580 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1581 1582 for (togo = XYC_MAXIOPB; togo > 0; 1583 togo--, hand = (hand + 1) % XYC_MAXIOPB) { 1584 struct xy_iopb *iopb, *prev_iopb, *dmaiopb; 1585 1586 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1587 xycsc->iopbase[hand].done) 1588 continue; /* not ready-for-i/o */ 1589 1590 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1591 iopb = xycsc->xy_chain[chain]->iopb; 1592 iopb->chen = 0; 1593 if (chain != 0) { 1594 /* adding a link to a chain */ 1595 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1596 prev_iopb->chen = 1; 1597 dmaiopb = xycsc->xy_chain[chain]->dmaiopb; 1598 prev_iopb->nxtiopb = ((u_long)dmaiopb) & 0xffff; 1599 } else { 1600 /* head of chain */ 1601 iorq = xycsc->xy_chain[chain]; 1602 } 1603 chain++; 1604 1605 /* quit if chaining dis-allowed */ 1606 if (xycsc->no_ols) 1607 break; 1608 } 1609 1610 return(iorq ? iorq->dmaiopb : NULL); 1611 } 1612 1613 /* 1614 * xyc_piodriver 1615 * 1616 * programmed i/o driver. this function takes over the computer 1617 * and drains off the polled i/o request. it returns the status of the iorq 1618 * the caller is interesting in. 1619 */ 1620 int 1621 xyc_piodriver(xycsc, iorq) 1622 struct xyc_softc *xycsc; 1623 struct xy_iorq *iorq; 1624 1625 { 1626 int nreset = 0; 1627 int retval = 0; 1628 u_long res; 1629 #ifdef XYC_DEBUG 1630 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1631 #endif 1632 1633 while (iorq->iopb->done == 0) { 1634 1635 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1636 1637 /* we expect some progress soon */ 1638 if (res == XY_ERR_FAIL && nreset >= 2) { 1639 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1640 #ifdef XYC_DEBUG 1641 printf("xyc_piodriver: timeout\n"); 1642 #endif 1643 return (XY_ERR_FAIL); 1644 } 1645 if (res == XY_ERR_FAIL) { 1646 if (xyc_reset(xycsc, 0, 1647 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1648 XY_ERR_FAIL, 1649 0) == XY_ERR_FAIL) 1650 return (XY_ERR_FAIL); /* flushes all but POLL 1651 * requests, resets */ 1652 continue; 1653 } 1654 1655 xyc_remove_iorq(xycsc); /* may resubmit request */ 1656 1657 if (iorq->iopb->done == 0) 1658 xyc_start(xycsc, iorq); 1659 } 1660 1661 /* get return value */ 1662 1663 retval = iorq->errno; 1664 1665 #ifdef XYC_DEBUG 1666 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1667 iorq->errno, xyc_e2str(iorq->errno)); 1668 #endif 1669 1670 /* start up any bufs that have queued */ 1671 1672 xyc_start(xycsc, NULL); 1673 1674 return (retval); 1675 } 1676 1677 /* 1678 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1679 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1680 */ 1681 void 1682 xyc_xyreset(xycsc, xysc) 1683 struct xyc_softc *xycsc; 1684 struct xy_softc *xysc; 1685 1686 { 1687 struct xy_iopb tmpiopb; 1688 struct xy_iopb *iopb; 1689 int del; 1690 1691 iopb = xycsc->ciopb; 1692 1693 /* Save contents */ 1694 bcopy(iopb, &tmpiopb, sizeof(struct xy_iopb)); 1695 1696 iopb->chen = iopb->done = iopb->errs = 0; 1697 iopb->ien = 0; 1698 iopb->com = XYCMD_RST; 1699 iopb->unit = xysc->xy_drive; 1700 1701 XYC_GO(xycsc->xyc, (u_long)xycsc->ciorq->dmaiopb); 1702 1703 del = XYC_RESETUSEC; 1704 while (del > 0) { 1705 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) 1706 break; 1707 DELAY(1); 1708 del--; 1709 } 1710 1711 if (del <= 0 || iopb->errs) { 1712 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1713 xyc_e2str(iopb->errno)); 1714 del = xycsc->xyc->xyc_rsetup; 1715 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1716 panic("xyc_reset"); 1717 } else { 1718 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1719 } 1720 1721 /* Restore contents */ 1722 bcopy(&tmpiopb, iopb, sizeof(struct xy_iopb)); 1723 } 1724 1725 1726 /* 1727 * xyc_reset: reset everything: requests are marked as errors except 1728 * a polled request (which is resubmitted) 1729 */ 1730 int 1731 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1732 struct xyc_softc *xycsc; 1733 int quiet, error; 1734 struct xy_iorq *blastmode; 1735 struct xy_softc *xysc; 1736 1737 { 1738 int del = 0, lcv, retval = XY_ERR_AOK; 1739 1740 /* soft reset hardware */ 1741 1742 if (!quiet) 1743 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1744 del = xycsc->xyc->xyc_rsetup; 1745 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1746 if (del == XY_ERR_FAIL) { 1747 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1748 retval = XY_ERR_FAIL; 1749 } 1750 if (xysc) 1751 xyc_xyreset(xycsc, xysc); 1752 1753 /* fix queues based on "blast-mode" */ 1754 1755 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1756 register struct xy_iorq *iorq = &xycsc->reqs[lcv]; 1757 1758 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1759 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1760 XY_STATE(iorq->mode) != XY_SUB_NORM) 1761 /* is it active? */ 1762 continue; 1763 1764 if (blastmode == XY_RSET_ALL || 1765 blastmode != iorq) { 1766 /* failed */ 1767 iorq->errno = error; 1768 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1769 switch (XY_STATE(iorq->mode)) { 1770 case XY_SUB_NORM: 1771 iorq->buf->b_error = EIO; 1772 iorq->buf->b_flags |= B_ERROR; 1773 iorq->buf->b_resid = iorq->sectcnt * XYFM_BPS; 1774 1775 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1776 iorq->dmamap->dm_mapsize, 1777 (iorq->buf->b_flags & B_READ) 1778 ? BUS_DMASYNC_POSTREAD 1779 : BUS_DMASYNC_POSTWRITE); 1780 1781 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1782 1783 BUFQ_REMOVE(&iorq->xy->xyq, iorq->buf); 1784 disk_unbusy(&xycsc->reqs[lcv].xy->sc_dk, 1785 (xycsc->reqs[lcv].buf->b_bcount - 1786 xycsc->reqs[lcv].buf->b_resid)); 1787 biodone(iorq->buf); 1788 iorq->mode = XY_SUB_FREE; 1789 break; 1790 case XY_SUB_WAIT: 1791 wakeup(iorq); 1792 case XY_SUB_POLL: 1793 iorq->mode = 1794 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1795 break; 1796 } 1797 1798 } else { 1799 1800 /* resubmit, no need to do anything here */ 1801 } 1802 } 1803 1804 /* 1805 * now, if stuff is waiting, start it. 1806 * since we just reset it should go 1807 */ 1808 xyc_start(xycsc, NULL); 1809 1810 return (retval); 1811 } 1812 1813 /* 1814 * xyc_start: start waiting buffers 1815 */ 1816 1817 void 1818 xyc_start(xycsc, iorq) 1819 struct xyc_softc *xycsc; 1820 struct xy_iorq *iorq; 1821 1822 { 1823 int lcv; 1824 struct xy_softc *xy; 1825 1826 if (iorq == NULL) { 1827 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1828 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1829 if (BUFQ_FIRST(&xy->xyq) == NULL) continue; 1830 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1831 xyc_startbuf(xycsc, xy, BUFQ_FIRST(&xy->xyq)); 1832 } 1833 } 1834 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1835 } 1836 1837 /* 1838 * xyc_remove_iorq: remove "done" IOPB's. 1839 */ 1840 1841 int 1842 xyc_remove_iorq(xycsc) 1843 struct xyc_softc *xycsc; 1844 1845 { 1846 int errno, rq, comm, errs; 1847 struct xyc *xyc = xycsc->xyc; 1848 u_long addr; 1849 struct xy_iopb *iopb; 1850 struct xy_iorq *iorq; 1851 struct buf *bp; 1852 1853 if (xyc->xyc_csr & XYC_DERR) { 1854 /* 1855 * DOUBLE ERROR: should never happen under normal use. This 1856 * error is so bad, you can't even tell which IOPB is bad, so 1857 * we dump them all. 1858 */ 1859 errno = XY_ERR_DERR; 1860 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1861 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1862 printf("%s: soft reset failed!\n", 1863 xycsc->sc_dev.dv_xname); 1864 panic("xyc_remove_iorq: controller DEAD"); 1865 } 1866 return (XY_ERR_AOK); 1867 } 1868 1869 /* 1870 * get iopb that is done, loop down the chain 1871 */ 1872 1873 if (xyc->xyc_csr & XYC_ERR) { 1874 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1875 } 1876 if (xyc->xyc_csr & XYC_IPND) { 1877 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1878 } 1879 1880 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1881 iorq = xycsc->xy_chain[rq]; 1882 if (iorq == NULL) break; /* done ! */ 1883 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1884 continue; /* free, or done */ 1885 iopb = iorq->iopb; 1886 if (iopb->done == 0) 1887 continue; /* not done yet */ 1888 1889 comm = iopb->com; 1890 errs = iopb->errs; 1891 1892 if (errs) 1893 iorq->errno = iopb->errno; 1894 else 1895 iorq->errno = 0; 1896 1897 /* handle non-fatal errors */ 1898 1899 if (errs && 1900 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1901 continue; /* AOK: we resubmitted it */ 1902 1903 1904 /* this iorq is now done (hasn't been restarted or anything) */ 1905 1906 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1907 xyc_perror(iorq, iopb, 0); 1908 1909 /* now, if read/write check to make sure we got all the data 1910 * we needed. (this may not be the case if we got an error in 1911 * the middle of a multisector request). */ 1912 1913 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1914 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1915 /* we just successfully processed a bad144 sector 1916 * note: if we are in bad 144 mode, the pointers have 1917 * been advanced already (see above) and are pointing 1918 * at the bad144 sector. to exit bad144 mode, we 1919 * must advance the pointers 1 sector and issue a new 1920 * request if there are still sectors left to process 1921 * 1922 */ 1923 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1924 1925 /* exit b144 mode */ 1926 iorq->mode = iorq->mode & (~XY_MODE_B144); 1927 1928 if (iorq->sectcnt) { /* more to go! */ 1929 iorq->lasterror = iorq->errno = iopb->errno = 0; 1930 iopb->errs = iopb->done = 0; 1931 iorq->tries = 0; 1932 iopb->scnt = iorq->sectcnt; 1933 iopb->cyl = iorq->blockno / 1934 iorq->xy->sectpercyl; 1935 iopb->head = 1936 (iorq->blockno / iorq->xy->nhead) % 1937 iorq->xy->nhead; 1938 iopb->sect = iorq->blockno % XYFM_BPS; 1939 addr = (u_long) iorq->dbuf; 1940 iopb->dataa = (addr & 0xffff); 1941 iopb->datar = ((addr & 0xff0000) >> 16); 1942 /* will resubit at end */ 1943 continue; 1944 } 1945 } 1946 /* final cleanup, totally done with this request */ 1947 1948 switch (XY_STATE(iorq->mode)) { 1949 case XY_SUB_NORM: 1950 bp = iorq->buf; 1951 if (errs) { 1952 bp->b_error = EIO; 1953 bp->b_flags |= B_ERROR; 1954 bp->b_resid = iorq->sectcnt * XYFM_BPS; 1955 } else { 1956 bp->b_resid = 0; /* done */ 1957 } 1958 bus_dmamap_sync(xycsc->dmatag, iorq->dmamap, 0, 1959 iorq->dmamap->dm_mapsize, 1960 (iorq->buf->b_flags & B_READ) 1961 ? BUS_DMASYNC_POSTREAD 1962 : BUS_DMASYNC_POSTWRITE); 1963 1964 bus_dmamap_unload(xycsc->dmatag, iorq->dmamap); 1965 1966 BUFQ_REMOVE(&iorq->xy->xyq, bp); 1967 disk_unbusy(&iorq->xy->sc_dk, 1968 (bp->b_bcount - bp->b_resid)); 1969 iorq->mode = XY_SUB_FREE; 1970 biodone(bp); 1971 break; 1972 case XY_SUB_WAIT: 1973 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1974 wakeup(iorq); 1975 break; 1976 case XY_SUB_POLL: 1977 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1978 break; 1979 } 1980 } 1981 1982 return (XY_ERR_AOK); 1983 } 1984 1985 /* 1986 * xyc_perror: print error. 1987 * - if still_trying is true: we got an error, retried and got a 1988 * different error. in that case lasterror is the old error, 1989 * and errno is the new one. 1990 * - if still_trying is not true, then if we ever had an error it 1991 * is in lasterror. also, if iorq->errno == 0, then we recovered 1992 * from that error (otherwise iorq->errno == iorq->lasterror). 1993 */ 1994 void 1995 xyc_perror(iorq, iopb, still_trying) 1996 struct xy_iorq *iorq; 1997 struct xy_iopb *iopb; 1998 int still_trying; 1999 2000 { 2001 2002 int error = iorq->lasterror; 2003 2004 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 2005 : iorq->xyc->sc_dev.dv_xname); 2006 if (iorq->buf) 2007 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 2008 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 2009 printf("%s %d/%d/%d: ", 2010 (iopb->com == XYCMD_RD) ? "read" : "write", 2011 iopb->cyl, iopb->head, iopb->sect); 2012 printf("%s", xyc_e2str(error)); 2013 2014 if (still_trying) 2015 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 2016 else 2017 if (iorq->errno == 0) 2018 printf(" [recovered in %d tries]", iorq->tries); 2019 2020 printf("\n"); 2021 } 2022 2023 /* 2024 * xyc_error: non-fatal error encountered... recover. 2025 * return AOK if resubmitted, return FAIL if this iopb is done 2026 */ 2027 int 2028 xyc_error(xycsc, iorq, iopb, comm) 2029 struct xyc_softc *xycsc; 2030 struct xy_iorq *iorq; 2031 struct xy_iopb *iopb; 2032 int comm; 2033 2034 { 2035 int errno = iorq->errno; 2036 int erract = xyc_entoact(errno); 2037 int oldmode, advance; 2038 #ifdef __sparc__ 2039 int i; 2040 #endif 2041 2042 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 2043 oldmode = iorq->mode; 2044 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 2045 /* make xyc_start ignore us */ 2046 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 2047 iorq->mode = oldmode; 2048 } 2049 /* check for read/write to a sector in bad144 table if bad: redirect 2050 * request to bad144 area */ 2051 2052 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 2053 (iorq->mode & XY_MODE_B144) == 0) { 2054 advance = iorq->sectcnt - iopb->scnt; 2055 XYC_ADVANCE(iorq, advance); 2056 #ifdef __sparc__ 2057 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 2058 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 2059 iorq->blockno % iorq->xy->nsect)) != -1) { 2060 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 2061 * redirect */ 2062 iopb->errno = iopb->done = iopb->errs = 0; 2063 iopb->scnt = 1; 2064 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 2065 /* second to last acyl */ 2066 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 2067 * standard */ 2068 iopb->head = i / iorq->xy->nhead; 2069 iopb->sect = i % iorq->xy->nhead; 2070 /* will resubmit when we come out of remove_iorq */ 2071 return (XY_ERR_AOK); /* recovered! */ 2072 } 2073 #endif 2074 } 2075 2076 /* 2077 * it isn't a bad144 sector, must be real error! see if we can retry 2078 * it? 2079 */ 2080 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 2081 xyc_perror(iorq, iopb, 1); /* inform of error state 2082 * change */ 2083 iorq->lasterror = errno; 2084 2085 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 2086 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 2087 iorq->tries++; 2088 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 2089 /* will resubmit at end of remove_iorq */ 2090 return (XY_ERR_AOK); /* recovered! */ 2091 } 2092 2093 /* failed to recover from this error */ 2094 return (XY_ERR_FAIL); 2095 } 2096 2097 /* 2098 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 2099 */ 2100 void 2101 xyc_tick(arg) 2102 void *arg; 2103 2104 { 2105 struct xyc_softc *xycsc = arg; 2106 int lcv, s, reset = 0; 2107 2108 /* reduce ttl for each request if one goes to zero, reset xyc */ 2109 s = splbio(); 2110 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 2111 if (xycsc->reqs[lcv].mode == 0 || 2112 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 2113 continue; 2114 xycsc->reqs[lcv].ttl--; 2115 if (xycsc->reqs[lcv].ttl == 0) 2116 reset = 1; 2117 } 2118 if (reset) { 2119 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 2120 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 2121 } 2122 splx(s); 2123 2124 /* until next time */ 2125 2126 callout_reset(&xycsc->sc_tick_ch, XYC_TICKCNT, xyc_tick, xycsc); 2127 } 2128 2129 /* 2130 * xyc_ioctlcmd: this function provides a user level interface to the 2131 * controller via ioctl. this allows "format" programs to be written 2132 * in user code, and is also useful for some debugging. we return 2133 * an error code. called at user priority. 2134 * 2135 * XXX missing a few commands (see the 7053 driver for ideas) 2136 */ 2137 int 2138 xyc_ioctlcmd(xy, dev, xio) 2139 struct xy_softc *xy; 2140 dev_t dev; 2141 struct xd_iocmd *xio; 2142 2143 { 2144 int s, rqno, dummy = 0; 2145 caddr_t dvmabuf = NULL, buf = NULL; 2146 struct xyc_softc *xycsc; 2147 int rseg, error; 2148 bus_dma_segment_t seg; 2149 2150 /* check sanity of requested command */ 2151 2152 switch (xio->cmd) { 2153 2154 case XYCMD_NOP: /* no op: everything should be zero */ 2155 if (xio->subfn || xio->dptr || xio->dlen || 2156 xio->block || xio->sectcnt) 2157 return (EINVAL); 2158 break; 2159 2160 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2161 case XYCMD_WR: 2162 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2163 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2164 return (EINVAL); 2165 break; 2166 2167 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2168 return (EINVAL); 2169 2170 break; 2171 2172 default: 2173 return (EINVAL);/* ??? */ 2174 } 2175 2176 xycsc = xy->parent; 2177 2178 /* create DVMA buffer for request if needed */ 2179 if (xio->dlen) { 2180 if ((error = xy_dmamem_alloc(xycsc->dmatag, xycsc->auxmap, 2181 &seg, &rseg, 2182 xio->dlen, &buf, 2183 (bus_addr_t *)&dvmabuf)) != 0) { 2184 return (error); 2185 } 2186 2187 if (xio->cmd == XYCMD_WR) { 2188 if ((error = copyin(xio->dptr, buf, xio->dlen)) != 0) { 2189 bus_dmamem_unmap(xycsc->dmatag, buf, xio->dlen); 2190 bus_dmamem_free(xycsc->dmatag, &seg, rseg); 2191 return (error); 2192 } 2193 } 2194 } 2195 /* do it! */ 2196 2197 error = 0; 2198 s = splbio(); 2199 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2200 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2201 if (rqno == XY_ERR_FAIL) { 2202 error = EIO; 2203 goto done; 2204 } 2205 xio->errno = xycsc->ciorq->errno; 2206 xio->tries = xycsc->ciorq->tries; 2207 XYC_DONE(xycsc, dummy); 2208 2209 if (xio->cmd == XYCMD_RD) 2210 error = copyout(buf, xio->dptr, xio->dlen); 2211 2212 done: 2213 splx(s); 2214 if (dvmabuf) { 2215 xy_dmamem_free(xycsc->dmatag, xycsc->auxmap, &seg, rseg, 2216 xio->dlen, buf); 2217 } 2218 return (error); 2219 } 2220 2221 /* 2222 * xyc_e2str: convert error code number into an error string 2223 */ 2224 char * 2225 xyc_e2str(no) 2226 int no; 2227 { 2228 switch (no) { 2229 case XY_ERR_FAIL: 2230 return ("Software fatal error"); 2231 case XY_ERR_DERR: 2232 return ("DOUBLE ERROR"); 2233 case XY_ERR_AOK: 2234 return ("Successful completion"); 2235 case XY_ERR_IPEN: 2236 return("Interrupt pending"); 2237 case XY_ERR_BCFL: 2238 return("Busy conflict"); 2239 case XY_ERR_TIMO: 2240 return("Operation timeout"); 2241 case XY_ERR_NHDR: 2242 return("Header not found"); 2243 case XY_ERR_HARD: 2244 return("Hard ECC error"); 2245 case XY_ERR_ICYL: 2246 return("Illegal cylinder address"); 2247 case XY_ERR_ISEC: 2248 return("Illegal sector address"); 2249 case XY_ERR_SMAL: 2250 return("Last sector too small"); 2251 case XY_ERR_SACK: 2252 return("Slave ACK error (non-existent memory)"); 2253 case XY_ERR_CHER: 2254 return("Cylinder and head/header error"); 2255 case XY_ERR_SRTR: 2256 return("Auto-seek retry successful"); 2257 case XY_ERR_WPRO: 2258 return("Write-protect error"); 2259 case XY_ERR_UIMP: 2260 return("Unimplemented command"); 2261 case XY_ERR_DNRY: 2262 return("Drive not ready"); 2263 case XY_ERR_SZER: 2264 return("Sector count zero"); 2265 case XY_ERR_DFLT: 2266 return("Drive faulted"); 2267 case XY_ERR_ISSZ: 2268 return("Illegal sector size"); 2269 case XY_ERR_SLTA: 2270 return("Self test A"); 2271 case XY_ERR_SLTB: 2272 return("Self test B"); 2273 case XY_ERR_SLTC: 2274 return("Self test C"); 2275 case XY_ERR_SOFT: 2276 return("Soft ECC error"); 2277 case XY_ERR_SFOK: 2278 return("Soft ECC error recovered"); 2279 case XY_ERR_IHED: 2280 return("Illegal head"); 2281 case XY_ERR_DSEQ: 2282 return("Disk sequencer error"); 2283 case XY_ERR_SEEK: 2284 return("Seek error"); 2285 default: 2286 return ("Unknown error"); 2287 } 2288 } 2289 2290 int 2291 xyc_entoact(errno) 2292 2293 int errno; 2294 2295 { 2296 switch (errno) { 2297 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2298 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2299 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2300 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2301 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2302 2303 return(XY_ERA_PROG); /* program error ! */ 2304 2305 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2306 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2307 case XY_ERR_SOFT: 2308 2309 return(XY_ERA_HARD); /* hard error, retry */ 2310 2311 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2312 2313 return(XY_ERA_RSET); /* hard error reset */ 2314 2315 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2316 2317 return(XY_ERA_SOFT); /* an FYI error */ 2318 2319 case XY_ERR_WPRO: 2320 2321 return(XY_ERA_WPRO); /* write protect */ 2322 } 2323 2324 return(XY_ERA_PROG); /* ??? */ 2325 } 2326
Indexes created Tue Sep 30 20:09:53 GMT 2025