xy.c revision 1.22
1 /* $NetBSD: xy.c,v 1.22 1998/07/23 23:48:33 gwr 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 * id: &Id: xy.c,v 1.1 1995/09/25 20:35:14 chuck Exp & 40 * started: 14-Sep-95 41 * references: [1] Xylogics Model 753 User's Manual 42 * part number: 166-753-001, Revision B, May 21, 1988. 43 * "Your Partner For Performance" 44 * [2] other NetBSD disk device drivers 45 * [3] Xylogics Model 450 User's Manual 46 * part number: 166-017-001, Revision B, 1983. 47 * [4] Addendum to Xylogics Model 450 Disk Controller User's 48 * Manual, Jan. 1985. 49 * [5] The 451 Controller, Rev. B3, September 2, 1986. 50 * [6] David Jones <dej (at) achilles.net>'s unfinished 450/451 driver 51 * 52 */ 53 54 #undef XYC_DEBUG /* full debug */ 55 #undef XYC_DIAG /* extra sanity checks */ 56 #if defined(DIAGNOSTIC) && !defined(XYC_DIAG) 57 #define XYC_DIAG /* link in with master DIAG option */ 58 #endif 59 60 #include <sys/param.h> 61 #include <sys/proc.h> 62 #include <sys/systm.h> 63 #include <sys/kernel.h> 64 #include <sys/file.h> 65 #include <sys/stat.h> 66 #include <sys/ioctl.h> 67 #include <sys/buf.h> 68 #include <sys/uio.h> 69 #include <sys/malloc.h> 70 #include <sys/device.h> 71 #include <sys/disklabel.h> 72 #include <sys/disk.h> 73 #include <sys/syslog.h> 74 #include <sys/dkbad.h> 75 #include <sys/conf.h> 76 77 #include <vm/vm.h> 78 #include <vm/vm_kern.h> 79 80 #include <dev/sun/disklabel.h> 81 82 #include <machine/autoconf.h> 83 #include <machine/dvma.h> 84 85 #include <sun3/dev/xyreg.h> 86 #include <sun3/dev/xyvar.h> 87 #include <sun3/dev/xio.h> 88 89 #include "locators.h" 90 91 /* 92 * Print a complaint when no xy children were specified 93 * in the config file. Better than a link error... 94 * 95 * XXX: Some folks say this driver should be split in two, 96 * but that seems pointless with ONLY one type of child. 97 */ 98 #include "xy.h" 99 #if NXY == 0 100 #error "xyc but no xy?" 101 #endif 102 103 /* 104 * macros 105 */ 106 107 /* 108 * XYC_GO: start iopb ADDR (DVMA addr in a u_long) on XYC 109 */ 110 #define XYC_GO(XYC, ADDR) { \ 111 (XYC)->xyc_addr_lo = ((ADDR) & 0xff); \ 112 (ADDR) = ((ADDR) >> 8); \ 113 (XYC)->xyc_addr_hi = ((ADDR) & 0xff); \ 114 (ADDR) = ((ADDR) >> 8); \ 115 (XYC)->xyc_reloc_lo = ((ADDR) & 0xff); \ 116 (ADDR) = ((ADDR) >> 8); \ 117 (XYC)->xyc_reloc_hi = (ADDR); \ 118 (XYC)->xyc_csr = XYC_GBSY; /* go! */ \ 119 } 120 121 /* 122 * XYC_DONE: don't need IORQ, get error code and free (done after xyc_cmd) 123 */ 124 125 #define XYC_DONE(SC,ER) { \ 126 if ((ER) == XY_ERR_AOK) { \ 127 (ER) = (SC)->ciorq->errno; \ 128 (SC)->ciorq->mode = XY_SUB_FREE; \ 129 wakeup((SC)->ciorq); \ 130 } \ 131 } 132 133 /* 134 * XYC_ADVANCE: advance iorq's pointers by a number of sectors 135 */ 136 137 #define XYC_ADVANCE(IORQ, N) { \ 138 if (N) { \ 139 (IORQ)->sectcnt -= (N); \ 140 (IORQ)->blockno += (N); \ 141 (IORQ)->dbuf += ((N)*XYFM_BPS); \ 142 } \ 143 } 144 145 /* 146 * note - addresses you can sleep on: 147 * [1] & of xy_softc's "state" (waiting for a chance to attach a drive) 148 * [2] & an iorq (waiting for an XY_SUB_WAIT iorq to finish) 149 */ 150 151 152 /* 153 * function prototypes 154 * "xyc_*" functions are internal, all others are external interfaces 155 */ 156 157 /* internals */ 158 struct xy_iopb *xyc_chain __P((struct xyc_softc *, struct xy_iorq *)); 159 int xyc_cmd __P((struct xyc_softc *, int, int, int, int, int, char *, int)); 160 char *xyc_e2str __P((int)); 161 int xyc_entoact __P((int)); 162 int xyc_error __P((struct xyc_softc *, struct xy_iorq *, 163 struct xy_iopb *, int)); 164 int xyc_ioctlcmd __P((struct xy_softc *, dev_t dev, struct xd_iocmd *)); 165 void xyc_perror __P((struct xy_iorq *, struct xy_iopb *, int)); 166 int xyc_piodriver __P((struct xyc_softc *, struct xy_iorq *)); 167 int xyc_remove_iorq __P((struct xyc_softc *)); 168 int xyc_reset __P((struct xyc_softc *, int, struct xy_iorq *, int, 169 struct xy_softc *)); 170 inline void xyc_rqinit __P((struct xy_iorq *, struct xyc_softc *, 171 struct xy_softc *, int, u_long, int, 172 caddr_t, struct buf *)); 173 void xyc_rqtopb __P((struct xy_iorq *, struct xy_iopb *, int, int)); 174 void xyc_start __P((struct xyc_softc *, struct xy_iorq *)); 175 int xyc_startbuf __P((struct xyc_softc *, struct xy_softc *, struct buf *)); 176 int xyc_submit_iorq __P((struct xyc_softc *, struct xy_iorq *, int)); 177 void xyc_tick __P((void *)); 178 int xyc_unbusy __P((struct xyc *, int)); 179 void xyc_xyreset __P((struct xyc_softc *, struct xy_softc *)); 180 181 /* machine interrupt hook */ 182 int xycintr __P((void *)); 183 184 /* bdevsw, cdevsw */ 185 bdev_decl(xy); 186 cdev_decl(xy); 187 188 /* autoconf */ 189 static int xycmatch __P((struct device *, struct cfdata *, void *)); 190 static void xycattach __P((struct device *, struct device *, void *)); 191 static int xyc_print __P((void *, const char *name)); 192 193 static int xymatch __P((struct device *, struct cfdata *, void *)); 194 static void xyattach __P((struct device *, struct device *, void *)); 195 static void xy_init __P((struct xy_softc *)); 196 197 static void xydummystrat __P((struct buf *)); 198 int xygetdisklabel __P((struct xy_softc *, void *)); 199 200 /* 201 * cfattach's: device driver interface to autoconfig 202 */ 203 204 struct cfattach xyc_ca = { 205 sizeof(struct xyc_softc), xycmatch, xycattach 206 }; 207 208 struct cfattach xy_ca = { 209 sizeof(struct xy_softc), xymatch, xyattach 210 }; 211 212 extern struct cfdriver xy_cd; 213 214 struct xyc_attach_args { /* this is the "aux" args to xyattach */ 215 int driveno; /* unit number */ 216 }; 217 218 /* 219 * dkdriver 220 */ 221 222 struct dkdriver xydkdriver = { xystrategy }; 223 224 /* 225 * start: disk label fix code (XXX) 226 */ 227 228 static void *xy_labeldata; 229 230 static void 231 xydummystrat(bp) 232 struct buf *bp; 233 { 234 if (bp->b_bcount != XYFM_BPS) 235 panic("xydummystrat"); 236 bcopy(xy_labeldata, bp->b_un.b_addr, XYFM_BPS); 237 bp->b_flags |= B_DONE; 238 bp->b_flags &= ~B_BUSY; 239 } 240 241 int 242 xygetdisklabel(xy, b) 243 struct xy_softc *xy; 244 void *b; 245 { 246 char *err; 247 struct sun_disklabel *sdl; 248 249 /* We already have the label data in `b'; setup for dummy strategy */ 250 xy_labeldata = b; 251 252 /* Required parameter for readdisklabel() */ 253 xy->sc_dk.dk_label->d_secsize = XYFM_BPS; 254 255 err = readdisklabel(MAKEDISKDEV(0, xy->sc_dev.dv_unit, RAW_PART), 256 xydummystrat, 257 xy->sc_dk.dk_label, xy->sc_dk.dk_cpulabel); 258 if (err) { 259 printf("%s: %s\n", xy->sc_dev.dv_xname, err); 260 return(XY_ERR_FAIL); 261 } 262 263 /* Ok, we have the label; fill in `pcyl' if there's SunOS magic */ 264 sdl = (struct sun_disklabel *)xy->sc_dk.dk_cpulabel->cd_block; 265 if (sdl->sl_magic == SUN_DKMAGIC) 266 xy->pcyl = sdl->sl_pcyl; 267 else { 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 * a u t o c o n f i g f u n c t i o n s 292 */ 293 294 /* 295 * xycmatch: determine if xyc is present or not. we do a 296 * soft reset to detect the xyc. 297 */ 298 static int 299 xycmatch(parent, cf, aux) 300 struct device *parent; 301 struct cfdata *cf; 302 void *aux; 303 { 304 struct confargs *ca = aux; 305 306 /* No default VME address. */ 307 if (ca->ca_paddr == -1) 308 return (0); 309 310 /* Make sure something is there... */ 311 if (bus_peek(ca->ca_bustype, ca->ca_paddr + 5, 1) == -1) 312 return (0); 313 314 /* Default interrupt priority. */ 315 if (ca->ca_intpri == -1) 316 ca->ca_intpri = 2; 317 318 return (1); 319 } 320 321 /* 322 * xycattach: attach controller 323 */ 324 static void 325 xycattach(parent, self, aux) 326 struct device *parent, *self; 327 void *aux; 328 { 329 struct xyc_softc *xyc = (void *) self; 330 struct confargs *ca = aux; 331 struct xyc_attach_args xa; 332 int lcv, err, res, pbsz; 333 void *tmp, *tmp2; 334 u_long ultmp; 335 336 /* get addressing and intr level stuff from autoconfig and load it 337 * into our xyc_softc. */ 338 339 xyc->xyc = (struct xyc *) 340 bus_mapin(ca->ca_bustype, ca->ca_paddr, sizeof(struct xyc)); 341 xyc->bustype = ca->ca_bustype; 342 xyc->ipl = ca->ca_intpri; 343 xyc->vector = ca->ca_intvec; 344 xyc->no_ols = 0; /* XXX should be from config */ 345 346 for (lcv = 0; lcv < XYC_MAXDEV; lcv++) 347 xyc->sc_drives[lcv] = (struct xy_softc *) 0; 348 349 /* 350 * allocate and zero buffers 351 * check boundaries of the KVA's ... all IOPBs must reside in 352 * the same 64K region. 353 */ 354 355 pbsz = XYC_MAXIOPB * sizeof(struct xy_iopb); 356 tmp = tmp2 = (struct xy_iopb *) dvma_malloc(pbsz); /* KVA */ 357 ultmp = (u_long) tmp; 358 if ((ultmp & 0xffff0000) != ((ultmp + pbsz) & 0xffff0000)) { 359 tmp = (struct xy_iopb *) dvma_malloc(pbsz); /* retry! */ 360 dvma_free(tmp2, pbsz); 361 ultmp = (u_long) tmp; 362 if ((ultmp & 0xffff0000) != ((ultmp + pbsz) & 0xffff0000)) { 363 printf("%s: can't alloc IOPB mem in 64K\n", 364 xyc->sc_dev.dv_xname); 365 return; 366 } 367 } 368 bzero(tmp, pbsz); 369 xyc->iopbase = tmp; 370 xyc->dvmaiopb = (struct xy_iopb *) 371 dvma_kvtopa(xyc->iopbase, xyc->bustype); 372 xyc->reqs = (struct xy_iorq *) 373 malloc(XYC_MAXIOPB * sizeof(struct xy_iorq), M_DEVBUF, M_NOWAIT); 374 if (xyc->reqs == NULL) 375 panic("xyc malloc"); 376 bzero(xyc->reqs, XYC_MAXIOPB * sizeof(struct xy_iorq)); 377 378 /* 379 * init iorq to iopb pointers, and non-zero fields in the 380 * iopb which never change. 381 */ 382 383 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 384 xyc->xy_chain[lcv] = NULL; 385 xyc->reqs[lcv].iopb = &xyc->iopbase[lcv]; 386 xyc->iopbase[lcv].asr = 1; /* always the same */ 387 xyc->iopbase[lcv].eef = 1; /* always the same */ 388 xyc->iopbase[lcv].ecm = XY_ECM; /* always the same */ 389 xyc->iopbase[lcv].aud = 1; /* always the same */ 390 xyc->iopbase[lcv].relo = 1; /* always the same */ 391 xyc->iopbase[lcv].thro = XY_THRO;/* always the same */ 392 } 393 xyc->ciorq = &xyc->reqs[XYC_CTLIOPB]; /* short hand name */ 394 xyc->ciopb = &xyc->iopbase[XYC_CTLIOPB]; /* short hand name */ 395 xyc->xy_hand = 0; 396 397 /* read controller parameters and insure we have a 450/451 */ 398 399 err = xyc_cmd(xyc, XYCMD_ST, 0, 0, 0, 0, 0, XY_SUB_POLL); 400 res = xyc->ciopb->ctyp; 401 XYC_DONE(xyc, err); 402 if (res != XYCT_450) { 403 if (err) 404 printf(": %s: ", xyc_e2str(err)); 405 printf(": doesn't identify as a 450/451\n"); 406 return; 407 } 408 printf(": Xylogics 450/451"); 409 if (xyc->no_ols) 410 printf(" [OLS disabled]"); /* 450 doesn't overlap seek right */ 411 printf("\n"); 412 if (err) { 413 printf("%s: error: %s\n", xyc->sc_dev.dv_xname, 414 xyc_e2str(err)); 415 return; 416 } 417 if ((xyc->xyc->xyc_csr & XYC_ADRM) == 0) { 418 printf("%s: 24 bit addressing turned off\n", 419 xyc->sc_dev.dv_xname); 420 printf("please set hardware jumpers JM1-JM2=in, JM3-JM4=out\n"); 421 printf("to enable 24 bit mode and this driver\n"); 422 return; 423 } 424 425 /* link in interrupt with higher level software */ 426 isr_add_vectored(xycintr, (void *)xyc, 427 ca->ca_intpri, ca->ca_intvec); 428 evcnt_attach(&xyc->sc_dev, "intr", &xyc->sc_intrcnt); 429 430 /* now we must look for disks using autoconfig */ 431 for (xa.driveno = 0; xa.driveno < XYC_MAXDEV; xa.driveno++) 432 (void) config_found(self, (void *) &xa, xyc_print); 433 434 /* start the watchdog clock */ 435 timeout(xyc_tick, xyc, XYC_TICKCNT); 436 } 437 438 static int 439 xyc_print(aux, name) 440 void *aux; 441 const char *name; 442 { 443 struct xyc_attach_args *xa = aux; 444 445 if (name != NULL) 446 printf("%s: ", name); 447 448 if (xa->driveno != -1) 449 printf(" drive %d", xa->driveno); 450 451 return UNCONF; 452 } 453 454 /* 455 * xymatch: probe for disk. 456 * 457 * note: we almost always say disk is present. this allows us to 458 * spin up and configure a disk after the system is booted (we can 459 * call xyattach!). Also, wire down the relationship between the 460 * xy* and xyc* devices, to simplify boot device identification. 461 */ 462 static int 463 xymatch(parent, cf, aux) 464 struct device *parent; 465 struct cfdata *cf; 466 void *aux; 467 { 468 struct xyc_attach_args *xa = aux; 469 int xy_unit; 470 471 /* Match only on the "wired-down" controller+disk. */ 472 xy_unit = parent->dv_unit * 2 + xa->driveno; 473 if (cf->cf_unit != xy_unit) 474 return (0); 475 476 return (1); 477 } 478 479 /* 480 * xyattach: attach a disk. 481 */ 482 static void 483 xyattach(parent, self, aux) 484 struct device *parent, *self; 485 void *aux; 486 { 487 struct xy_softc *xy = (void *) self; 488 struct xyc_softc *xyc = (void *) parent; 489 struct xyc_attach_args *xa = aux; 490 491 printf("\n"); 492 493 /* 494 * Always re-initialize the disk structure. We want statistics 495 * to start with a clean slate. 496 */ 497 bzero(&xy->sc_dk, sizeof(xy->sc_dk)); 498 xy->sc_dk.dk_driver = &xydkdriver; 499 xy->sc_dk.dk_name = xy->sc_dev.dv_xname; 500 501 xy->state = XY_DRIVE_UNKNOWN; /* to start */ 502 xy->flags = 0; 503 xy->parent = xyc; 504 505 /* init queue of waiting bufs */ 506 xy->xyq.b_active = 0; 507 xy->xyq.b_actf = 0; 508 xy->xyq.b_actb = &xy->xyq.b_actf; /* XXX b_actb: not used? */ 509 xy->xyrq = &xyc->reqs[xa->driveno]; 510 511 xy->xy_drive = xa->driveno; 512 xyc->sc_drives[xa->driveno] = xy; 513 514 /* Do init work common to attach and open. */ 515 xy_init(xy); 516 dk_establish(&xy->sc_dk, &xy->sc_dev); 517 } 518 519 /* 520 * end of autoconfig functions 521 */ 522 523 /* 524 * Initialize a disk. This can be called from both autoconf and 525 * also from xyopen/xystrategy. 526 */ 527 static void 528 xy_init(xy) 529 struct xy_softc *xy; 530 { 531 struct xyc_softc *xyc; 532 struct dkbad *dkb; 533 void *dvmabuf; 534 int err, spt, mb, blk, lcv, fullmode, newstate; 535 extern int cold; 536 537 xyc = xy->parent; 538 xy->state = XY_DRIVE_ATTACHING; 539 newstate = XY_DRIVE_UNKNOWN; 540 fullmode = (cold) ? XY_SUB_POLL : XY_SUB_WAIT; 541 dvmabuf = dvma_malloc(XYFM_BPS); 542 543 /* first try and reset the drive */ 544 545 err = xyc_cmd(xyc, XYCMD_RST, 0, xy->xy_drive, 0, 0, 0, fullmode); 546 XYC_DONE(xyc, err); 547 if (err == XY_ERR_DNRY) { 548 printf("%s: drive %d: off-line\n", 549 xy->sc_dev.dv_xname, xy->xy_drive); 550 goto done; 551 } 552 if (err) { 553 printf("%s: ERROR 0x%02x (%s)\n", 554 xy->sc_dev.dv_xname, err, xyc_e2str(err)); 555 goto done; 556 } 557 printf("%s: drive %d ready", 558 xy->sc_dev.dv_xname, xy->xy_drive); 559 560 /* 561 * now set drive parameters (to semi-bogus values) so we can read the 562 * disk label. 563 */ 564 xy->pcyl = xy->ncyl = 1; 565 xy->acyl = 0; 566 xy->nhead = 1; 567 xy->nsect = 1; 568 xy->sectpercyl = 1; 569 for (lcv = 0; lcv < 126; lcv++) /* init empty bad144 table */ 570 xy->dkb.bt_bad[lcv].bt_cyl = 571 xy->dkb.bt_bad[lcv].bt_trksec = 0xffff; 572 573 /* read disk label */ 574 for (xy->drive_type = 0 ; xy->drive_type <= XYC_MAXDT ; 575 xy->drive_type++) { 576 err = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, 0, 1, 577 dvmabuf, fullmode); 578 XYC_DONE(xyc, err); 579 if (err == XY_ERR_AOK) break; 580 } 581 582 if (err != XY_ERR_AOK) { 583 printf("%s: reading disk label failed: %s\n", 584 xy->sc_dev.dv_xname, xyc_e2str(err)); 585 goto done; 586 } 587 printf("%s: drive type %d\n", 588 xy->sc_dev.dv_xname, xy->drive_type); 589 590 newstate = XY_DRIVE_NOLABEL; 591 592 xy->hw_spt = spt = 0; /* XXX needed ? */ 593 /* Attach the disk: must be before getdisklabel to malloc label */ 594 disk_attach(&xy->sc_dk); 595 596 if (xygetdisklabel(xy, dvmabuf) != XY_ERR_AOK) 597 goto done; 598 599 /* inform the user of what is up */ 600 printf("%s: <%s>, pcyl %d\n", 601 xy->sc_dev.dv_xname, 602 (char *)dvmabuf, xy->pcyl); 603 mb = xy->ncyl * (xy->nhead * xy->nsect) / (1048576 / XYFM_BPS); 604 printf("%s: %dMB, %d cyl, %d head, %d sec\n", 605 xy->sc_dev.dv_xname, mb, 606 xy->ncyl, xy->nhead, xy->nsect); 607 608 /* 609 * 450/451 stupidity: the drive type is encoded into the format 610 * of the disk. the drive type in the IOPB must match the drive 611 * type in the format, or you will not be able to do I/O to the 612 * disk (you get header not found errors). if you have two drives 613 * of different sizes that have the same drive type in their 614 * formatting then you are out of luck. 615 * 616 * this problem was corrected in the 753/7053. 617 */ 618 619 for (lcv = 0 ; lcv < XYC_MAXDEV ; lcv++) { 620 struct xy_softc *oxy; 621 622 oxy = xyc->sc_drives[lcv]; 623 if (oxy == NULL || oxy == xy) continue; 624 if (oxy->drive_type != xy->drive_type) continue; 625 if (xy->nsect != oxy->nsect || xy->pcyl != oxy->pcyl || 626 xy->nhead != oxy->nhead) { 627 printf("%s: %s and %s must be the same size!\n", 628 xyc->sc_dev.dv_xname, 629 xy ->sc_dev.dv_xname, 630 oxy->sc_dev.dv_xname); 631 panic("xy drive size mismatch"); 632 } 633 } 634 635 636 /* now set the real drive parameters! */ 637 blk = (xy->nsect - 1) + 638 ((xy->nhead - 1) * xy->nsect) + 639 ((xy->pcyl - 1) * xy->nsect * xy->nhead); 640 err = xyc_cmd(xyc, XYCMD_SDS, 0, xy->xy_drive, blk, 0, 0, fullmode); 641 XYC_DONE(xyc, err); 642 if (err) { 643 printf("%s: write drive size failed: %s\n", 644 xy->sc_dev.dv_xname, xyc_e2str(err)); 645 goto done; 646 } 647 newstate = XY_DRIVE_ONLINE; 648 649 /* 650 * read bad144 table. this table resides on the first sector of the 651 * last track of the disk (i.e. second cyl of "acyl" area). 652 */ 653 blk = (xy->ncyl + xy->acyl - 1) * (xy->nhead * xy->nsect) + 654 /* last cyl */ 655 (xy->nhead - 1) * xy->nsect; /* last head */ 656 err = xyc_cmd(xyc, XYCMD_RD, 0, xy->xy_drive, blk, 1, 657 dvmabuf, fullmode); 658 XYC_DONE(xyc, err); 659 if (err) { 660 printf("%s: reading bad144 failed: %s\n", 661 xy->sc_dev.dv_xname, xyc_e2str(err)); 662 goto done; 663 } 664 665 /* check dkbad for sanity */ 666 dkb = (struct dkbad *) dvmabuf; 667 for (lcv = 0; lcv < 126; lcv++) { 668 if ((dkb->bt_bad[lcv].bt_cyl == 0xffff || 669 dkb->bt_bad[lcv].bt_cyl == 0) && 670 dkb->bt_bad[lcv].bt_trksec == 0xffff) 671 continue; /* blank */ 672 if (dkb->bt_bad[lcv].bt_cyl >= xy->ncyl) 673 break; 674 if ((dkb->bt_bad[lcv].bt_trksec >> 8) >= xy->nhead) 675 break; 676 if ((dkb->bt_bad[lcv].bt_trksec & 0xff) >= xy->nsect) 677 break; 678 } 679 if (lcv != 126) { 680 printf("%s: warning: invalid bad144 sector!\n", 681 xy->sc_dev.dv_xname); 682 } else { 683 bcopy(dvmabuf, &xy->dkb, XYFM_BPS); 684 } 685 686 done: 687 xy->state = newstate; 688 dvma_free(dvmabuf, XYFM_BPS); 689 } 690 691 /* 692 * { b , c } d e v s w f u n c t i o n s 693 */ 694 695 /* 696 * xyclose: close device 697 */ 698 int 699 xyclose(dev, flag, fmt, p) 700 dev_t dev; 701 int flag, fmt; 702 struct proc *p; 703 { 704 struct xy_softc *xy = xy_cd.cd_devs[DISKUNIT(dev)]; 705 int part = DISKPART(dev); 706 707 /* clear mask bits */ 708 709 switch (fmt) { 710 case S_IFCHR: 711 xy->sc_dk.dk_copenmask &= ~(1 << part); 712 break; 713 case S_IFBLK: 714 xy->sc_dk.dk_bopenmask &= ~(1 << part); 715 break; 716 } 717 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 718 719 return 0; 720 } 721 722 /* 723 * xydump: crash dump system 724 */ 725 int 726 xydump(dev, blkno, va, sz) 727 dev_t dev; 728 daddr_t blkno; 729 caddr_t va; 730 size_t sz; 731 { 732 int unit, part; 733 struct xy_softc *xy; 734 735 unit = DISKUNIT(dev); 736 if (unit >= xy_cd.cd_ndevs) 737 return ENXIO; 738 part = DISKPART(dev); 739 740 xy = xy_cd.cd_devs[unit]; 741 742 printf("%s%c: crash dump not supported (yet)\n", xy->sc_dev.dv_xname, 743 'a' + part); 744 745 return ENXIO; 746 747 /* outline: globals: "dumplo" == sector number of partition to start 748 * dump at (convert to physical sector with partition table) 749 * "dumpsize" == size of dump in clicks "physmem" == size of physical 750 * memory (clicks, ctob() to get bytes) (normal case: dumpsize == 751 * physmem) 752 * 753 * dump a copy of physical memory to the dump device starting at sector 754 * "dumplo" in the swap partition (make sure > 0). map in pages as 755 * we go. use polled I/O. 756 * 757 * XXX how to handle NON_CONTIG? 758 */ 759 } 760 761 /* 762 * xyioctl: ioctls on XY drives. based on ioctl's of other netbsd disks. 763 */ 764 int 765 xyioctl(dev, command, addr, flag, p) 766 dev_t dev; 767 u_long command; 768 caddr_t addr; 769 int flag; 770 struct proc *p; 771 772 { 773 struct xy_softc *xy; 774 struct xd_iocmd *xio; 775 int error, s, unit; 776 777 unit = DISKUNIT(dev); 778 779 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 780 return (ENXIO); 781 782 /* switch on ioctl type */ 783 784 switch (command) { 785 case DIOCSBAD: /* set bad144 info */ 786 if ((flag & FWRITE) == 0) 787 return EBADF; 788 s = splbio(); 789 bcopy(addr, &xy->dkb, sizeof(xy->dkb)); 790 splx(s); 791 return 0; 792 793 case DIOCGDINFO: /* get disk label */ 794 bcopy(xy->sc_dk.dk_label, addr, sizeof(struct disklabel)); 795 return 0; 796 797 case DIOCGPART: /* get partition info */ 798 ((struct partinfo *) addr)->disklab = xy->sc_dk.dk_label; 799 ((struct partinfo *) addr)->part = 800 &xy->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 801 return 0; 802 803 case DIOCSDINFO: /* set disk label */ 804 if ((flag & FWRITE) == 0) 805 return EBADF; 806 error = setdisklabel(xy->sc_dk.dk_label, 807 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 808 xy->sc_dk.dk_cpulabel); 809 if (error == 0) { 810 if (xy->state == XY_DRIVE_NOLABEL) 811 xy->state = XY_DRIVE_ONLINE; 812 } 813 return error; 814 815 case DIOCWLABEL: /* change write status of disk label */ 816 if ((flag & FWRITE) == 0) 817 return EBADF; 818 if (*(int *) addr) 819 xy->flags |= XY_WLABEL; 820 else 821 xy->flags &= ~XY_WLABEL; 822 return 0; 823 824 case DIOCWDINFO: /* write disk label */ 825 if ((flag & FWRITE) == 0) 826 return EBADF; 827 error = setdisklabel(xy->sc_dk.dk_label, 828 (struct disklabel *) addr, /* xy->sc_dk.dk_openmask : */ 0, 829 xy->sc_dk.dk_cpulabel); 830 if (error == 0) { 831 if (xy->state == XY_DRIVE_NOLABEL) 832 xy->state = XY_DRIVE_ONLINE; 833 834 /* Simulate opening partition 0 so write succeeds. */ 835 xy->sc_dk.dk_openmask |= (1 << 0); 836 error = writedisklabel(MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 837 xystrategy, xy->sc_dk.dk_label, 838 xy->sc_dk.dk_cpulabel); 839 xy->sc_dk.dk_openmask = 840 xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 841 } 842 return error; 843 844 case DIOSXDCMD: 845 xio = (struct xd_iocmd *) addr; 846 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 847 return (error); 848 return (xyc_ioctlcmd(xy, dev, xio)); 849 850 default: 851 return ENOTTY; 852 } 853 } 854 855 /* 856 * xyopen: open drive 857 */ 858 int 859 xyopen(dev, flag, fmt, p) 860 dev_t dev; 861 int flag, fmt; 862 struct proc *p; 863 { 864 int err, unit, part, s; 865 struct xy_softc *xy; 866 867 /* first, could it be a valid target? */ 868 unit = DISKUNIT(dev); 869 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == NULL) 870 return (ENXIO); 871 part = DISKPART(dev); 872 err = 0; 873 874 /* 875 * If some other processing is doing init, sleep. 876 */ 877 s = splbio(); 878 while (xy->state == XY_DRIVE_ATTACHING) { 879 if (tsleep(&xy->state, PRIBIO, "xyopen", 0)) { 880 err = EINTR; 881 goto done; 882 } 883 } 884 /* Do we need to init the drive? */ 885 if (xy->state == XY_DRIVE_UNKNOWN) { 886 xy_init(xy); 887 wakeup(&xy->state); 888 } 889 /* Was the init successful? */ 890 if (xy->state == XY_DRIVE_UNKNOWN) { 891 err = EIO; 892 goto done; 893 } 894 895 /* check for partition */ 896 if (part != RAW_PART && 897 (part >= xy->sc_dk.dk_label->d_npartitions || 898 xy->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 899 err = ENXIO; 900 goto done; 901 } 902 903 /* set open masks */ 904 switch (fmt) { 905 case S_IFCHR: 906 xy->sc_dk.dk_copenmask |= (1 << part); 907 break; 908 case S_IFBLK: 909 xy->sc_dk.dk_bopenmask |= (1 << part); 910 break; 911 } 912 xy->sc_dk.dk_openmask = xy->sc_dk.dk_copenmask | xy->sc_dk.dk_bopenmask; 913 914 done: 915 splx(s); 916 return (err); 917 } 918 919 int 920 xyread(dev, uio, flags) 921 dev_t dev; 922 struct uio *uio; 923 int flags; 924 { 925 926 return (physio(xystrategy, NULL, dev, B_READ, minphys, uio)); 927 } 928 929 int 930 xywrite(dev, uio, flags) 931 dev_t dev; 932 struct uio *uio; 933 int flags; 934 { 935 936 return (physio(xystrategy, NULL, dev, B_WRITE, minphys, uio)); 937 } 938 939 940 /* 941 * xysize: return size of a partition for a dump 942 */ 943 944 int 945 xysize(dev) 946 dev_t dev; 947 948 { 949 struct xy_softc *xysc; 950 int unit, part, size, omask; 951 952 /* valid unit? */ 953 unit = DISKUNIT(dev); 954 if (unit >= xy_cd.cd_ndevs || (xysc = xy_cd.cd_devs[unit]) == NULL) 955 return (-1); 956 957 part = DISKPART(dev); 958 omask = xysc->sc_dk.dk_openmask & (1 << part); 959 960 if (omask == 0 && xyopen(dev, 0, S_IFBLK, NULL) != 0) 961 return (-1); 962 963 /* do it */ 964 if (xysc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 965 size = -1; /* only give valid size for swap partitions */ 966 else 967 size = xysc->sc_dk.dk_label->d_partitions[part].p_size * 968 (xysc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 969 if (omask == 0 && xyclose(dev, 0, S_IFBLK, NULL) != 0) 970 return (-1); 971 return (size); 972 } 973 974 /* 975 * xystrategy: buffering system interface to xy. 976 */ 977 void 978 xystrategy(bp) 979 struct buf *bp; 980 981 { 982 struct xy_softc *xy; 983 int s, unit; 984 985 unit = DISKUNIT(bp->b_dev); 986 987 /* check for live device */ 988 989 if (unit >= xy_cd.cd_ndevs || (xy = xy_cd.cd_devs[unit]) == 0 || 990 bp->b_blkno < 0 || 991 (bp->b_bcount % xy->sc_dk.dk_label->d_secsize) != 0) { 992 bp->b_error = EINVAL; 993 goto bad; 994 } 995 996 /* There should always be an open first. */ 997 if (xy->state == XY_DRIVE_UNKNOWN) { 998 bp->b_error = EIO; 999 goto bad; 1000 } 1001 if (xy->state != XY_DRIVE_ONLINE && DISKPART(bp->b_dev) != RAW_PART) { 1002 /* no I/O to unlabeled disks, unless raw partition */ 1003 bp->b_error = EIO; 1004 goto bad; 1005 } 1006 /* short circuit zero length request */ 1007 1008 if (bp->b_bcount == 0) 1009 goto done; 1010 1011 /* check bounds with label (disksubr.c). Determine the size of the 1012 * transfer, and make sure it is within the boundaries of the 1013 * partition. Adjust transfer if needed, and signal errors or early 1014 * completion. */ 1015 1016 if (bounds_check_with_label(bp, xy->sc_dk.dk_label, 1017 (xy->flags & XY_WLABEL) != 0) <= 0) 1018 goto done; 1019 1020 /* 1021 * now we know we have a valid buf structure that we need to do I/O 1022 * on. 1023 */ 1024 1025 s = splbio(); /* protect the queues */ 1026 1027 disksort(&xy->xyq, bp); 1028 1029 /* start 'em up */ 1030 1031 xyc_start(xy->parent, NULL); 1032 1033 /* done! */ 1034 1035 splx(s); 1036 return; 1037 1038 bad: /* tells upper layers we have an error */ 1039 bp->b_flags |= B_ERROR; 1040 done: /* tells upper layers we are done with this 1041 * buf */ 1042 bp->b_resid = bp->b_bcount; 1043 biodone(bp); 1044 } 1045 /* 1046 * end of {b,c}devsw functions 1047 */ 1048 1049 /* 1050 * i n t e r r u p t f u n c t i o n 1051 * 1052 * xycintr: hardware interrupt. 1053 */ 1054 int 1055 xycintr(v) 1056 void *v; 1057 1058 { 1059 struct xyc_softc *xycsc = v; 1060 1061 /* kick the event counter */ 1062 xycsc->sc_intrcnt.ev_count++; 1063 1064 /* remove as many done IOPBs as possible */ 1065 xyc_remove_iorq(xycsc); 1066 1067 /* start any iorq's already waiting */ 1068 xyc_start(xycsc, NULL); 1069 1070 return (1); 1071 } 1072 /* 1073 * end of interrupt function 1074 */ 1075 1076 /* 1077 * i n t e r n a l f u n c t i o n s 1078 */ 1079 1080 /* 1081 * xyc_rqinit: fill out the fields of an I/O request 1082 */ 1083 1084 inline void 1085 xyc_rqinit(rq, xyc, xy, md, blk, cnt, db, bp) 1086 struct xy_iorq *rq; 1087 struct xyc_softc *xyc; 1088 struct xy_softc *xy; 1089 int md; 1090 u_long blk; 1091 int cnt; 1092 caddr_t db; 1093 struct buf *bp; 1094 { 1095 rq->xyc = xyc; 1096 rq->xy = xy; 1097 rq->ttl = XYC_MAXTTL + 10; 1098 rq->mode = md; 1099 rq->tries = rq->errno = rq->lasterror = 0; 1100 rq->blockno = blk; 1101 rq->sectcnt = cnt; 1102 rq->dbuf = rq->dbufbase = db; 1103 rq->buf = bp; 1104 } 1105 1106 /* 1107 * xyc_rqtopb: load up an IOPB based on an iorq 1108 */ 1109 1110 void 1111 xyc_rqtopb(iorq, iopb, cmd, subfun) 1112 struct xy_iorq *iorq; 1113 struct xy_iopb *iopb; 1114 int cmd, subfun; 1115 1116 { 1117 u_long block, dp; 1118 1119 /* normal IOPB case, standard stuff */ 1120 1121 /* chain bit handled later */ 1122 iopb->ien = (XY_STATE(iorq->mode) == XY_SUB_POLL) ? 0 : 1; 1123 iopb->com = cmd; 1124 iopb->errno = 0; 1125 iopb->errs = 0; 1126 iopb->done = 0; 1127 if (iorq->xy) { 1128 iopb->unit = iorq->xy->xy_drive; 1129 iopb->dt = iorq->xy->drive_type; 1130 } else { 1131 iopb->unit = 0; 1132 iopb->dt = 0; 1133 } 1134 block = iorq->blockno; 1135 if (iorq->xy == NULL || block == 0) { 1136 iopb->sect = iopb->head = iopb->cyl = 0; 1137 } else { 1138 iopb->sect = block % iorq->xy->nsect; 1139 block = block / iorq->xy->nsect; 1140 iopb->head = block % iorq->xy->nhead; 1141 block = block / iorq->xy->nhead; 1142 iopb->cyl = block; 1143 } 1144 iopb->scnt = iorq->sectcnt; 1145 if (iorq->dbuf == NULL) { 1146 iopb->dataa = 0; 1147 iopb->datar = 0; 1148 } else { 1149 dp = dvma_kvtopa(iorq->dbuf, iorq->xyc->bustype); 1150 iopb->dataa = (dp & 0xffff); 1151 iopb->datar = ((dp & 0xff0000) >> 16); 1152 } 1153 iopb->subfn = subfun; 1154 } 1155 1156 1157 /* 1158 * xyc_unbusy: wait for the xyc to go unbusy, or timeout. 1159 */ 1160 1161 int 1162 xyc_unbusy(xyc, del) 1163 1164 struct xyc *xyc; 1165 int del; 1166 1167 { 1168 while (del-- > 0) { 1169 if ((xyc->xyc_csr & XYC_GBSY) == 0) 1170 break; 1171 DELAY(1); 1172 } 1173 return(del == 0 ? XY_ERR_FAIL : XY_ERR_AOK); 1174 } 1175 1176 /* 1177 * xyc_cmd: front end for POLL'd and WAIT'd commands. Returns 0 or error. 1178 * note that NORM requests are handled seperately. 1179 */ 1180 int 1181 xyc_cmd(xycsc, cmd, subfn, unit, block, scnt, dptr, fullmode) 1182 struct xyc_softc *xycsc; 1183 int cmd, subfn, unit, block, scnt; 1184 char *dptr; 1185 int fullmode; 1186 { 1187 struct xy_iorq *iorq = xycsc->ciorq; 1188 struct xy_iopb *iopb = xycsc->ciopb; 1189 int submode = XY_STATE(fullmode); 1190 1191 /* 1192 * is someone else using the control iopq wait for it if we can 1193 */ 1194 start: 1195 if (submode == XY_SUB_WAIT && XY_STATE(iorq->mode) != XY_SUB_FREE) { 1196 if (tsleep(iorq, PRIBIO, "xyc_cmd", 0)) 1197 return(XY_ERR_FAIL); 1198 goto start; 1199 } 1200 1201 if (XY_STATE(iorq->mode) != XY_SUB_FREE) { 1202 DELAY(1000000); /* XY_SUB_POLL: steal the iorq */ 1203 iorq->mode = XY_SUB_FREE; 1204 printf("%s: stole control iopb\n", xycsc->sc_dev.dv_xname); 1205 } 1206 1207 /* init iorq/iopb */ 1208 1209 xyc_rqinit(iorq, xycsc, 1210 (unit == XYC_NOUNIT) ? NULL : xycsc->sc_drives[unit], 1211 fullmode, block, scnt, dptr, NULL); 1212 1213 /* load IOPB from iorq */ 1214 1215 xyc_rqtopb(iorq, iopb, cmd, subfn); 1216 1217 /* submit it for processing */ 1218 1219 xyc_submit_iorq(xycsc, iorq, fullmode); /* error code will be in iorq */ 1220 1221 return(XY_ERR_AOK); 1222 } 1223 1224 /* 1225 * xyc_startbuf 1226 * start a buffer for running 1227 */ 1228 1229 int 1230 xyc_startbuf(xycsc, xysc, bp) 1231 struct xyc_softc *xycsc; 1232 struct xy_softc *xysc; 1233 struct buf *bp; 1234 1235 { 1236 int partno; 1237 struct xy_iorq *iorq; 1238 struct xy_iopb *iopb; 1239 u_long block; 1240 caddr_t dbuf; 1241 1242 iorq = xysc->xyrq; 1243 iopb = iorq->iopb; 1244 1245 /* get buf */ 1246 1247 if (bp == NULL) 1248 panic("xyc_startbuf null buf"); 1249 1250 partno = DISKPART(bp->b_dev); 1251 #ifdef XYC_DEBUG 1252 printf("xyc_startbuf: %s%c: %s block %d\n", xysc->sc_dev.dv_xname, 1253 'a' + partno, (bp->b_flags & B_READ) ? "read" : "write", bp->b_blkno); 1254 printf("xyc_startbuf: b_bcount %d, b_data 0x%x\n", 1255 bp->b_bcount, bp->b_data); 1256 #endif 1257 1258 /* 1259 * load request. we have to calculate the correct block number based 1260 * on partition info. 1261 * 1262 * also, note that there are two kinds of buf structures, those with 1263 * B_PHYS set and those without B_PHYS. if B_PHYS is set, then it is 1264 * a raw I/O (to a cdevsw) and we are doing I/O directly to the users' 1265 * buffer which has already been mapped into DVMA space. (Not on sun3) 1266 * However, if B_PHYS is not set, then the buffer is a normal system 1267 * buffer which does *not* live in DVMA space. In that case we call 1268 * dvma_mapin to map it into DVMA space so we can do the DMA to it. 1269 * 1270 * in cases where we do a dvma_mapin, note that iorq points to the buffer 1271 * as mapped into DVMA space, where as the bp->b_data points to its 1272 * non-DVMA mapping. 1273 * 1274 * XXX - On the sun3, B_PHYS does NOT mean the buffer is mapped 1275 * into dvma space, only that it was remapped into the kernel. 1276 * We ALWAYS have to remap the kernel buf into DVMA space. 1277 * (It is done inexpensively, using whole segments!) 1278 */ 1279 1280 block = bp->b_blkno + ((partno == RAW_PART) ? 0 : 1281 xysc->sc_dk.dk_label->d_partitions[partno].p_offset); 1282 1283 dbuf = dvma_mapin(bp->b_data, bp->b_bcount, 0); 1284 if (dbuf == NULL) { /* out of DVMA space */ 1285 printf("%s: warning: out of DVMA space\n", 1286 xycsc->sc_dev.dv_xname); 1287 return (XY_ERR_FAIL); /* XXX: need some sort of 1288 * call-back scheme here? */ 1289 } 1290 1291 /* init iorq and load iopb from it */ 1292 1293 xyc_rqinit(iorq, xycsc, xysc, XY_SUB_NORM | XY_MODE_VERBO, block, 1294 bp->b_bcount / XYFM_BPS, dbuf, bp); 1295 1296 xyc_rqtopb(iorq, iopb, (bp->b_flags & B_READ) ? XYCMD_RD : XYCMD_WR, 0); 1297 1298 /* Instrumentation. */ 1299 disk_busy(&xysc->sc_dk); 1300 1301 return (XY_ERR_AOK); 1302 } 1303 1304 1305 /* 1306 * xyc_submit_iorq: submit an iorq for processing. returns XY_ERR_AOK 1307 * if ok. if it fail returns an error code. type is XY_SUB_*. 1308 * 1309 * note: caller frees iorq in all cases except NORM 1310 * 1311 * return value: 1312 * NORM: XY_AOK (req pending), XY_FAIL (couldn't submit request) 1313 * WAIT: XY_AOK (success), <error-code> (failed) 1314 * POLL: <same as WAIT> 1315 * NOQ : <same as NORM> 1316 * 1317 * there are three sources for i/o requests: 1318 * [1] xystrategy: normal block I/O, using "struct buf" system. 1319 * [2] autoconfig/crash dump: these are polled I/O requests, no interrupts. 1320 * [3] open/ioctl: these are I/O requests done in the context of a process, 1321 * and the process should block until they are done. 1322 * 1323 * software state is stored in the iorq structure. each iorq has an 1324 * iopb structure. the hardware understands the iopb structure. 1325 * every command must go through an iopb. a 450 handles one iopb at a 1326 * time, where as a 451 can take them in chains. [the 450 claims it 1327 * can handle chains, but is appears to be buggy...] iopb are allocated 1328 * in DVMA space at boot up time. each disk gets one iopb, and the 1329 * controller gets one (for POLL and WAIT commands). what happens if 1330 * the iopb is busy? for i/o type [1], the buffers are queued at the 1331 * "buff" layer and * picked up later by the interrupt routine. for case 1332 * [2] we can only be blocked if there is a WAIT type I/O request being 1333 * run. since this can only happen when we are crashing, we wait a sec 1334 * and then steal the IOPB. for case [3] the process can sleep 1335 * on the iorq free list until some iopbs are avaliable. 1336 */ 1337 1338 1339 int 1340 xyc_submit_iorq(xycsc, iorq, type) 1341 struct xyc_softc *xycsc; 1342 struct xy_iorq *iorq; 1343 int type; 1344 1345 { 1346 struct xy_iopb *iopb; 1347 u_long iopbaddr; 1348 1349 #ifdef XYC_DEBUG 1350 printf("xyc_submit_iorq(%s, addr=0x%x, type=%d)\n", 1351 xycsc->sc_dev.dv_xname, iorq, type); 1352 #endif 1353 1354 /* first check and see if controller is busy */ 1355 if ((xycsc->xyc->xyc_csr & XYC_GBSY) != 0) { 1356 #ifdef XYC_DEBUG 1357 printf("xyc_submit_iorq: XYC not ready (BUSY)\n"); 1358 #endif 1359 if (type == XY_SUB_NOQ) 1360 return (XY_ERR_FAIL); /* failed */ 1361 switch (type) { 1362 case XY_SUB_NORM: 1363 return XY_ERR_AOK; /* success */ 1364 case XY_SUB_WAIT: 1365 while (iorq->iopb->done == 0) { 1366 sleep(iorq, PRIBIO); 1367 } 1368 return (iorq->errno); 1369 case XY_SUB_POLL: /* steal controller */ 1370 iopbaddr = xycsc->xyc->xyc_rsetup; /* RESET */ 1371 if (xyc_unbusy(xycsc->xyc,XYC_RESETUSEC) == XY_ERR_FAIL) 1372 panic("xyc_submit_iorq: stuck xyc"); 1373 printf("%s: stole controller\n", 1374 xycsc->sc_dev.dv_xname); 1375 break; 1376 default: 1377 panic("xyc_submit_iorq adding"); 1378 } 1379 } 1380 1381 iopb = xyc_chain(xycsc, iorq); /* build chain */ 1382 if (iopb == NULL) { /* nothing doing? */ 1383 if (type == XY_SUB_NORM || type == XY_SUB_NOQ) 1384 return(XY_ERR_AOK); 1385 panic("xyc_submit_iorq: xyc_chain failed!\n"); 1386 } 1387 iopbaddr = dvma_kvtopa(iopb, xycsc->bustype); 1388 1389 XYC_GO(xycsc->xyc, iopbaddr); 1390 1391 /* command now running, wrap it up */ 1392 switch (type) { 1393 case XY_SUB_NORM: 1394 case XY_SUB_NOQ: 1395 return (XY_ERR_AOK); /* success */ 1396 case XY_SUB_WAIT: 1397 while (iorq->iopb->done == 0) { 1398 sleep(iorq, PRIBIO); 1399 } 1400 return (iorq->errno); 1401 case XY_SUB_POLL: 1402 return (xyc_piodriver(xycsc, iorq)); 1403 default: 1404 panic("xyc_submit_iorq wrap up"); 1405 } 1406 panic("xyc_submit_iorq"); 1407 return 0; /* not reached */ 1408 } 1409 1410 1411 /* 1412 * xyc_chain: build a chain. return dvma address of first element in 1413 * the chain. iorq != NULL: means we only want that item on the chain. 1414 */ 1415 1416 struct xy_iopb * 1417 xyc_chain(xycsc, iorq) 1418 struct xyc_softc *xycsc; 1419 struct xy_iorq *iorq; 1420 { 1421 int togo, chain, hand; 1422 struct xy_iopb *iopb, *prev_iopb; 1423 bzero(xycsc->xy_chain, sizeof(xycsc->xy_chain)); 1424 1425 /* 1426 * promote control IOPB to the top 1427 */ 1428 if (iorq == NULL) { 1429 if ((XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_POLL || 1430 XY_STATE(xycsc->reqs[XYC_CTLIOPB].mode) == XY_SUB_WAIT) && 1431 xycsc->iopbase[XYC_CTLIOPB].done == 0) 1432 iorq = &xycsc->reqs[XYC_CTLIOPB]; 1433 } 1434 /* 1435 * special case: if iorq != NULL then we have a POLL or WAIT request. 1436 * we let these take priority and do them first. 1437 */ 1438 if (iorq) { 1439 xycsc->xy_chain[0] = iorq; 1440 iorq->iopb->chen = 0; 1441 return(iorq->iopb); 1442 } 1443 1444 /* 1445 * NORM case: do round robin and maybe chain (if allowed and possible) 1446 */ 1447 1448 chain = 0; 1449 hand = xycsc->xy_hand; 1450 xycsc->xy_hand = (xycsc->xy_hand + 1) % XYC_MAXIOPB; 1451 1452 for (togo = XYC_MAXIOPB ; 1453 togo > 0 ; 1454 togo--, hand = (hand + 1) % XYC_MAXIOPB) 1455 { 1456 1457 if (XY_STATE(xycsc->reqs[hand].mode) != XY_SUB_NORM || 1458 xycsc->iopbase[hand].done) 1459 continue; /* not ready-for-i/o */ 1460 1461 xycsc->xy_chain[chain] = &xycsc->reqs[hand]; 1462 iopb = xycsc->xy_chain[chain]->iopb; 1463 iopb->chen = 0; 1464 if (chain != 0) { /* adding a link to a chain? */ 1465 prev_iopb = xycsc->xy_chain[chain-1]->iopb; 1466 prev_iopb->chen = 1; 1467 prev_iopb->nxtiopb = 0xffff & 1468 dvma_kvtopa(iopb, xycsc->bustype); 1469 } else { /* head of chain */ 1470 iorq = xycsc->xy_chain[chain]; 1471 } 1472 chain++; 1473 if (xycsc->no_ols) break; /* quit if chaining dis-allowed */ 1474 } 1475 return(iorq ? iorq->iopb : NULL); 1476 } 1477 1478 /* 1479 * xyc_piodriver 1480 * 1481 * programmed i/o driver. this function takes over the computer 1482 * and drains off the polled i/o request. it returns the status of the iorq 1483 * the caller is interesting in. 1484 */ 1485 int 1486 xyc_piodriver(xycsc, iorq) 1487 struct xyc_softc *xycsc; 1488 struct xy_iorq *iorq; 1489 1490 { 1491 int nreset = 0; 1492 int retval = 0; 1493 u_long res; 1494 1495 #ifdef XYC_DEBUG 1496 printf("xyc_piodriver(%s, 0x%x)\n", xycsc->sc_dev.dv_xname, iorq); 1497 #endif 1498 1499 while (iorq->iopb->done == 0) { 1500 1501 res = xyc_unbusy(xycsc->xyc, XYC_MAXTIME); 1502 1503 /* we expect some progress soon */ 1504 if (res == XY_ERR_FAIL && nreset >= 2) { 1505 xyc_reset(xycsc, 0, XY_RSET_ALL, XY_ERR_FAIL, 0); 1506 #ifdef XYC_DEBUG 1507 printf("xyc_piodriver: timeout\n"); 1508 #endif 1509 return (XY_ERR_FAIL); 1510 } 1511 if (res == XY_ERR_FAIL) { 1512 if (xyc_reset(xycsc, 0, 1513 (nreset++ == 0) ? XY_RSET_NONE : iorq, 1514 XY_ERR_FAIL, 1515 0) == XY_ERR_FAIL) 1516 return (XY_ERR_FAIL); /* flushes all but POLL 1517 * requests, resets */ 1518 continue; 1519 } 1520 1521 xyc_remove_iorq(xycsc); /* may resubmit request */ 1522 1523 if (iorq->iopb->done == 0) 1524 xyc_start(xycsc, iorq); 1525 } 1526 1527 /* get return value */ 1528 1529 retval = iorq->errno; 1530 1531 #ifdef XYC_DEBUG 1532 printf("xyc_piodriver: done, retval = 0x%x (%s)\n", 1533 iorq->errno, xyc_e2str(iorq->errno)); 1534 #endif 1535 1536 /* start up any bufs that have queued */ 1537 1538 xyc_start(xycsc, NULL); 1539 1540 return (retval); 1541 } 1542 1543 /* 1544 * xyc_xyreset: reset one drive. NOTE: assumes xyc was just reset. 1545 * we steal iopb[XYC_CTLIOPB] for this, but we put it back when we are done. 1546 */ 1547 void 1548 xyc_xyreset(xycsc, xysc) 1549 struct xyc_softc *xycsc; 1550 struct xy_softc *xysc; 1551 1552 { 1553 struct xy_iopb tmpiopb; 1554 u_long addr; 1555 int del; 1556 bcopy(xycsc->ciopb, &tmpiopb, sizeof(tmpiopb)); 1557 xycsc->ciopb->chen = xycsc->ciopb->done = xycsc->ciopb->errs = 0; 1558 xycsc->ciopb->ien = 0; 1559 xycsc->ciopb->com = XYCMD_RST; 1560 xycsc->ciopb->unit = xysc->xy_drive; 1561 addr = dvma_kvtopa(xycsc->ciopb, xycsc->bustype); 1562 1563 XYC_GO(xycsc->xyc, addr); 1564 1565 del = XYC_RESETUSEC; 1566 while (del > 0) { 1567 if ((xycsc->xyc->xyc_csr & XYC_GBSY) == 0) break; 1568 DELAY(1); 1569 del--; 1570 } 1571 1572 if (del <= 0 || xycsc->ciopb->errs) { 1573 printf("%s: off-line: %s\n", xycsc->sc_dev.dv_xname, 1574 xyc_e2str(xycsc->ciopb->errno)); 1575 del = xycsc->xyc->xyc_rsetup; 1576 if (xyc_unbusy(xycsc->xyc, XYC_RESETUSEC) == XY_ERR_FAIL) 1577 panic("xyc_reset"); 1578 } else { 1579 xycsc->xyc->xyc_csr = XYC_IPND; /* clear IPND */ 1580 } 1581 bcopy(&tmpiopb, xycsc->ciopb, sizeof(tmpiopb)); 1582 } 1583 1584 1585 /* 1586 * xyc_reset: reset everything: requests are marked as errors except 1587 * a polled request (which is resubmitted) 1588 */ 1589 int 1590 xyc_reset(xycsc, quiet, blastmode, error, xysc) 1591 struct xyc_softc *xycsc; 1592 int quiet, error; 1593 struct xy_iorq *blastmode; 1594 struct xy_softc *xysc; 1595 1596 { 1597 int del = 0, lcv, retval = XY_ERR_AOK; 1598 struct xy_iorq *iorq; 1599 1600 /* soft reset hardware */ 1601 1602 if (!quiet) 1603 printf("%s: soft reset\n", xycsc->sc_dev.dv_xname); 1604 del = xycsc->xyc->xyc_rsetup; 1605 del = xyc_unbusy(xycsc->xyc, XYC_RESETUSEC); 1606 if (del == XY_ERR_FAIL) { 1607 blastmode = XY_RSET_ALL; /* dead, flush all requests */ 1608 retval = XY_ERR_FAIL; 1609 } 1610 if (xysc) 1611 xyc_xyreset(xycsc, xysc); 1612 1613 /* fix queues based on "blast-mode" */ 1614 1615 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1616 iorq = &xycsc->reqs[lcv]; 1617 1618 if (XY_STATE(iorq->mode) != XY_SUB_POLL && 1619 XY_STATE(iorq->mode) != XY_SUB_WAIT && 1620 XY_STATE(iorq->mode) != XY_SUB_NORM) 1621 /* is it active? */ 1622 continue; 1623 1624 if (blastmode == XY_RSET_ALL || 1625 blastmode != iorq) { 1626 /* failed */ 1627 iorq->errno = error; 1628 xycsc->iopbase[lcv].done = xycsc->iopbase[lcv].errs = 1; 1629 switch (XY_STATE(iorq->mode)) { 1630 case XY_SUB_NORM: 1631 iorq->buf->b_error = EIO; 1632 iorq->buf->b_flags |= B_ERROR; 1633 iorq->buf->b_resid = 1634 iorq->sectcnt * XYFM_BPS; 1635 /* Sun3: map/unmap regardless of B_PHYS */ 1636 dvma_mapout(iorq->dbufbase, 1637 iorq->buf->b_bcount); 1638 iorq->xy->xyq.b_actf = 1639 iorq->buf->b_actf; 1640 disk_unbusy(&iorq->xy->sc_dk, 1641 (iorq->buf->b_bcount - 1642 iorq->buf->b_resid)); 1643 biodone(iorq->buf); 1644 iorq->mode = XY_SUB_FREE; 1645 break; 1646 case XY_SUB_WAIT: 1647 wakeup(iorq); 1648 case XY_SUB_POLL: 1649 iorq->mode = 1650 XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1651 break; 1652 } 1653 1654 } else { 1655 1656 /* resubmit, no need to do anything here */ 1657 } 1658 } 1659 1660 /* 1661 * now, if stuff is waiting, start it. 1662 * since we just reset it should go 1663 */ 1664 xyc_start(xycsc, NULL); 1665 1666 return (retval); 1667 } 1668 1669 /* 1670 * xyc_start: start waiting buffers 1671 */ 1672 1673 void 1674 xyc_start(xycsc, iorq) 1675 struct xyc_softc *xycsc; 1676 struct xy_iorq *iorq; 1677 1678 { 1679 int lcv; 1680 struct xy_softc *xy; 1681 1682 if (iorq == NULL) { 1683 for (lcv = 0; lcv < XYC_MAXDEV ; lcv++) { 1684 if ((xy = xycsc->sc_drives[lcv]) == NULL) continue; 1685 if (xy->xyq.b_actf == NULL) continue; 1686 if (xy->xyrq->mode != XY_SUB_FREE) continue; 1687 xyc_startbuf(xycsc, xy, xy->xyq.b_actf); 1688 } 1689 } 1690 xyc_submit_iorq(xycsc, iorq, XY_SUB_NOQ); 1691 } 1692 1693 /* 1694 * xyc_remove_iorq: remove "done" IOPB's. 1695 */ 1696 1697 int 1698 xyc_remove_iorq(xycsc) 1699 struct xyc_softc *xycsc; 1700 1701 { 1702 int errno, rq, comm, errs; 1703 struct xyc *xyc = xycsc->xyc; 1704 u_long addr; 1705 struct xy_iopb *iopb; 1706 struct xy_iorq *iorq; 1707 struct buf *bp; 1708 1709 if (xyc->xyc_csr & XYC_DERR) { 1710 /* 1711 * DOUBLE ERROR: should never happen under normal use. This 1712 * error is so bad, you can't even tell which IOPB is bad, so 1713 * we dump them all. 1714 */ 1715 errno = XY_ERR_DERR; 1716 printf("%s: DOUBLE ERROR!\n", xycsc->sc_dev.dv_xname); 1717 if (xyc_reset(xycsc, 0, XY_RSET_ALL, errno, 0) != XY_ERR_AOK) { 1718 printf("%s: soft reset failed!\n", 1719 xycsc->sc_dev.dv_xname); 1720 panic("xyc_remove_iorq: controller DEAD"); 1721 } 1722 return (XY_ERR_AOK); 1723 } 1724 1725 /* 1726 * get iopb that is done, loop down the chain 1727 */ 1728 1729 if (xyc->xyc_csr & XYC_ERR) { 1730 xyc->xyc_csr = XYC_ERR; /* clear error condition */ 1731 } 1732 if (xyc->xyc_csr & XYC_IPND) { 1733 xyc->xyc_csr = XYC_IPND; /* clear interrupt */ 1734 } 1735 1736 for (rq = 0; rq < XYC_MAXIOPB; rq++) { 1737 iorq = xycsc->xy_chain[rq]; 1738 if (iorq == NULL) break; /* done ! */ 1739 if (iorq->mode == 0 || XY_STATE(iorq->mode) == XY_SUB_DONE) 1740 continue; /* free, or done */ 1741 iopb = iorq->iopb; 1742 if (iopb->done == 0) 1743 continue; /* not done yet */ 1744 1745 comm = iopb->com; 1746 errs = iopb->errs; 1747 1748 if (errs) 1749 iorq->errno = iopb->errno; 1750 else 1751 iorq->errno = 0; 1752 1753 /* handle non-fatal errors */ 1754 1755 if (errs && 1756 xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK) 1757 continue; /* AOK: we resubmitted it */ 1758 1759 1760 /* this iorq is now done (hasn't been restarted or anything) */ 1761 1762 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1763 xyc_perror(iorq, iopb, 0); 1764 1765 /* now, if read/write check to make sure we got all the data 1766 * we needed. (this may not be the case if we got an error in 1767 * the middle of a multisector request). */ 1768 1769 if ((iorq->mode & XY_MODE_B144) != 0 && errs == 0 && 1770 (comm == XYCMD_RD || comm == XYCMD_WR)) { 1771 /* we just successfully processed a bad144 sector 1772 * note: if we are in bad 144 mode, the pointers have 1773 * been advanced already (see above) and are pointing 1774 * at the bad144 sector. to exit bad144 mode, we 1775 * must advance the pointers 1 sector and issue a new 1776 * request if there are still sectors left to process 1777 * 1778 */ 1779 XYC_ADVANCE(iorq, 1); /* advance 1 sector */ 1780 1781 /* exit b144 mode */ 1782 iorq->mode = iorq->mode & (~XY_MODE_B144); 1783 1784 if (iorq->sectcnt) { /* more to go! */ 1785 iorq->lasterror = iorq->errno = iopb->errno = 0; 1786 iopb->errs = iopb->done = 0; 1787 iorq->tries = 0; 1788 iopb->scnt = iorq->sectcnt; 1789 iopb->cyl = iorq->blockno / 1790 iorq->xy->sectpercyl; 1791 iopb->head = 1792 (iorq->blockno / iorq->xy->nhead) % 1793 iorq->xy->nhead; 1794 iopb->sect = iorq->blockno % XYFM_BPS; 1795 addr = dvma_kvtopa(iorq->dbuf, xycsc->bustype); 1796 iopb->dataa = (addr & 0xffff); 1797 iopb->datar = ((addr & 0xff0000) >> 16); 1798 /* will resubit at end */ 1799 continue; 1800 } 1801 } 1802 /* final cleanup, totally done with this request */ 1803 1804 switch (XY_STATE(iorq->mode)) { 1805 case XY_SUB_NORM: 1806 bp = iorq->buf; 1807 if (errs) { 1808 bp->b_error = EIO; 1809 bp->b_flags |= B_ERROR; 1810 bp->b_resid = iorq->sectcnt * XYFM_BPS; 1811 } else { 1812 bp->b_resid = 0; /* done */ 1813 } 1814 /* Sun3: map/unmap regardless of B_PHYS */ 1815 dvma_mapout(iorq->dbufbase, 1816 iorq->buf->b_bcount); 1817 iorq->xy->xyq.b_actf = bp->b_actf; 1818 disk_unbusy(&iorq->xy->sc_dk, 1819 (bp->b_bcount - bp->b_resid)); 1820 iorq->mode = XY_SUB_FREE; 1821 biodone(bp); 1822 break; 1823 case XY_SUB_WAIT: 1824 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1825 wakeup(iorq); 1826 break; 1827 case XY_SUB_POLL: 1828 iorq->mode = XY_NEWSTATE(iorq->mode, XY_SUB_DONE); 1829 break; 1830 } 1831 } 1832 1833 return (XY_ERR_AOK); 1834 } 1835 1836 /* 1837 * xyc_perror: print error. 1838 * - if still_trying is true: we got an error, retried and got a 1839 * different error. in that case lasterror is the old error, 1840 * and errno is the new one. 1841 * - if still_trying is not true, then if we ever had an error it 1842 * is in lasterror. also, if iorq->errno == 0, then we recovered 1843 * from that error (otherwise iorq->errno == iorq->lasterror). 1844 */ 1845 void 1846 xyc_perror(iorq, iopb, still_trying) 1847 struct xy_iorq *iorq; 1848 struct xy_iopb *iopb; 1849 int still_trying; 1850 1851 { 1852 1853 int error = iorq->lasterror; 1854 1855 printf("%s", (iorq->xy) ? iorq->xy->sc_dev.dv_xname 1856 : iorq->xyc->sc_dev.dv_xname); 1857 if (iorq->buf) 1858 printf("%c: ", 'a' + DISKPART(iorq->buf->b_dev)); 1859 if (iopb->com == XYCMD_RD || iopb->com == XYCMD_WR) 1860 printf("%s %d/%d/%d: ", 1861 (iopb->com == XYCMD_RD) ? "read" : "write", 1862 iopb->cyl, iopb->head, iopb->sect); 1863 printf("%s", xyc_e2str(error)); 1864 1865 if (still_trying) 1866 printf(" [still trying, new error=%s]", xyc_e2str(iorq->errno)); 1867 else 1868 if (iorq->errno == 0) 1869 printf(" [recovered in %d tries]", iorq->tries); 1870 1871 printf("\n"); 1872 } 1873 1874 /* 1875 * xyc_error: non-fatal error encountered... recover. 1876 * return AOK if resubmitted, return FAIL if this iopb is done 1877 */ 1878 int 1879 xyc_error(xycsc, iorq, iopb, comm) 1880 struct xyc_softc *xycsc; 1881 struct xy_iorq *iorq; 1882 struct xy_iopb *iopb; 1883 int comm; 1884 1885 { 1886 int errno = iorq->errno; 1887 int erract = xyc_entoact(errno); 1888 int oldmode, advance, i; 1889 1890 if (erract == XY_ERA_RSET) { /* some errors require a reset */ 1891 oldmode = iorq->mode; 1892 iorq->mode = XY_SUB_DONE | (~XY_SUB_MASK & oldmode); 1893 /* make xyc_start ignore us */ 1894 xyc_reset(xycsc, 1, XY_RSET_NONE, errno, iorq->xy); 1895 iorq->mode = oldmode; 1896 } 1897 /* check for read/write to a sector in bad144 table if bad: redirect 1898 * request to bad144 area */ 1899 1900 if ((comm == XYCMD_RD || comm == XYCMD_WR) && 1901 (iorq->mode & XY_MODE_B144) == 0) { 1902 advance = iorq->sectcnt - iopb->scnt; 1903 XYC_ADVANCE(iorq, advance); 1904 if ((i = isbad(&iorq->xy->dkb, iorq->blockno / iorq->xy->sectpercyl, 1905 (iorq->blockno / iorq->xy->nsect) % iorq->xy->nhead, 1906 iorq->blockno % iorq->xy->nsect)) != -1) { 1907 iorq->mode |= XY_MODE_B144; /* enter bad144 mode & 1908 * redirect */ 1909 iopb->errno = iopb->done = iopb->errs = 0; 1910 iopb->scnt = 1; 1911 iopb->cyl = (iorq->xy->ncyl + iorq->xy->acyl) - 2; 1912 /* second to last acyl */ 1913 i = iorq->xy->sectpercyl - 1 - i; /* follow bad144 1914 * standard */ 1915 iopb->head = i / iorq->xy->nhead; 1916 iopb->sect = i % iorq->xy->nhead; 1917 /* will resubmit when we come out of remove_iorq */ 1918 return (XY_ERR_AOK); /* recovered! */ 1919 } 1920 } 1921 1922 /* 1923 * it isn't a bad144 sector, must be real error! see if we can retry 1924 * it? 1925 */ 1926 if ((iorq->mode & XY_MODE_VERBO) && iorq->lasterror) 1927 xyc_perror(iorq, iopb, 1); /* inform of error state 1928 * change */ 1929 iorq->lasterror = errno; 1930 1931 if ((erract == XY_ERA_RSET || erract == XY_ERA_HARD) 1932 && iorq->tries < XYC_MAXTRIES) { /* retry? */ 1933 iorq->tries++; 1934 iorq->errno = iopb->errno = iopb->done = iopb->errs = 0; 1935 /* will resubmit at end of remove_iorq */ 1936 return (XY_ERR_AOK); /* recovered! */ 1937 } 1938 1939 /* failed to recover from this error */ 1940 return (XY_ERR_FAIL); 1941 } 1942 1943 /* 1944 * xyc_tick: make sure xy is still alive and ticking (err, kicking). 1945 */ 1946 void 1947 xyc_tick(arg) 1948 void *arg; 1949 1950 { 1951 struct xyc_softc *xycsc = arg; 1952 int lcv, s, reset = 0; 1953 1954 /* reduce ttl for each request if one goes to zero, reset xyc */ 1955 s = splbio(); 1956 for (lcv = 0; lcv < XYC_MAXIOPB; lcv++) { 1957 if (xycsc->reqs[lcv].mode == 0 || 1958 XY_STATE(xycsc->reqs[lcv].mode) == XY_SUB_DONE) 1959 continue; 1960 xycsc->reqs[lcv].ttl--; 1961 if (xycsc->reqs[lcv].ttl == 0) 1962 reset = 1; 1963 } 1964 if (reset) { 1965 printf("%s: watchdog timeout\n", xycsc->sc_dev.dv_xname); 1966 xyc_reset(xycsc, 0, XY_RSET_NONE, XY_ERR_FAIL, NULL); 1967 } 1968 splx(s); 1969 1970 /* until next time */ 1971 1972 timeout(xyc_tick, xycsc, XYC_TICKCNT); 1973 } 1974 1975 /* 1976 * xyc_ioctlcmd: this function provides a user level interface to the 1977 * controller via ioctl. this allows "format" programs to be written 1978 * in user code, and is also useful for some debugging. we return 1979 * an error code. called at user priority. 1980 * 1981 * XXX missing a few commands (see the 7053 driver for ideas) 1982 */ 1983 int 1984 xyc_ioctlcmd(xy, dev, xio) 1985 struct xy_softc *xy; 1986 dev_t dev; 1987 struct xd_iocmd *xio; 1988 1989 { 1990 int s, err, rqno; 1991 void * dvmabuf = NULL; 1992 struct xyc_softc *xycsc; 1993 1994 /* check sanity of requested command */ 1995 1996 switch (xio->cmd) { 1997 1998 case XYCMD_NOP: /* no op: everything should be zero */ 1999 if (xio->subfn || xio->dptr || xio->dlen || 2000 xio->block || xio->sectcnt) 2001 return (EINVAL); 2002 break; 2003 2004 case XYCMD_RD: /* read / write sectors (up to XD_IOCMD_MAXS) */ 2005 case XYCMD_WR: 2006 if (xio->subfn || xio->sectcnt > XD_IOCMD_MAXS || 2007 xio->sectcnt * XYFM_BPS != xio->dlen || xio->dptr == NULL) 2008 return (EINVAL); 2009 break; 2010 2011 case XYCMD_SK: /* seek: doesn't seem useful to export this */ 2012 return (EINVAL); 2013 2014 break; 2015 2016 default: 2017 return (EINVAL);/* ??? */ 2018 } 2019 2020 /* create DVMA buffer for request if needed */ 2021 2022 if (xio->dlen) { 2023 dvmabuf = dvma_malloc(xio->dlen); 2024 if (xio->cmd == XYCMD_WR) { 2025 err = copyin(xio->dptr, dvmabuf, xio->dlen); 2026 if (err) { 2027 dvma_free(dvmabuf, xio->dlen); 2028 return (err); 2029 } 2030 } 2031 } 2032 /* do it! */ 2033 2034 err = 0; 2035 xycsc = xy->parent; 2036 s = splbio(); 2037 rqno = xyc_cmd(xycsc, xio->cmd, xio->subfn, xy->xy_drive, xio->block, 2038 xio->sectcnt, dvmabuf, XY_SUB_WAIT); 2039 if (rqno == XY_ERR_FAIL) { 2040 err = EIO; 2041 goto done; 2042 } 2043 xio->errno = xycsc->ciorq->errno; 2044 xio->tries = xycsc->ciorq->tries; 2045 XYC_DONE(xycsc, err); 2046 2047 if (xio->cmd == XYCMD_RD) 2048 err = copyout(dvmabuf, xio->dptr, xio->dlen); 2049 2050 done: 2051 splx(s); 2052 if (dvmabuf) 2053 dvma_free(dvmabuf, xio->dlen); 2054 return (err); 2055 } 2056 2057 /* 2058 * xyc_e2str: convert error code number into an error string 2059 */ 2060 char * 2061 xyc_e2str(no) 2062 int no; 2063 { 2064 switch (no) { 2065 case XY_ERR_FAIL: 2066 return ("Software fatal error"); 2067 case XY_ERR_DERR: 2068 return ("DOUBLE ERROR"); 2069 case XY_ERR_AOK: 2070 return ("Successful completion"); 2071 case XY_ERR_IPEN: 2072 return("Interrupt pending"); 2073 case XY_ERR_BCFL: 2074 return("Busy conflict"); 2075 case XY_ERR_TIMO: 2076 return("Operation timeout"); 2077 case XY_ERR_NHDR: 2078 return("Header not found"); 2079 case XY_ERR_HARD: 2080 return("Hard ECC error"); 2081 case XY_ERR_ICYL: 2082 return("Illegal cylinder address"); 2083 case XY_ERR_ISEC: 2084 return("Illegal sector address"); 2085 case XY_ERR_SMAL: 2086 return("Last sector too small"); 2087 case XY_ERR_SACK: 2088 return("Slave ACK error (non-existent memory)"); 2089 case XY_ERR_CHER: 2090 return("Cylinder and head/header error"); 2091 case XY_ERR_SRTR: 2092 return("Auto-seek retry successful"); 2093 case XY_ERR_WPRO: 2094 return("Write-protect error"); 2095 case XY_ERR_UIMP: 2096 return("Unimplemented command"); 2097 case XY_ERR_DNRY: 2098 return("Drive not ready"); 2099 case XY_ERR_SZER: 2100 return("Sector count zero"); 2101 case XY_ERR_DFLT: 2102 return("Drive faulted"); 2103 case XY_ERR_ISSZ: 2104 return("Illegal sector size"); 2105 case XY_ERR_SLTA: 2106 return("Self test A"); 2107 case XY_ERR_SLTB: 2108 return("Self test B"); 2109 case XY_ERR_SLTC: 2110 return("Self test C"); 2111 case XY_ERR_SOFT: 2112 return("Soft ECC error"); 2113 case XY_ERR_SFOK: 2114 return("Soft ECC error recovered"); 2115 case XY_ERR_IHED: 2116 return("Illegal head"); 2117 case XY_ERR_DSEQ: 2118 return("Disk sequencer error"); 2119 case XY_ERR_SEEK: 2120 return("Seek error"); 2121 default: 2122 return ("Unknown error"); 2123 } 2124 } 2125 2126 int 2127 xyc_entoact(errno) 2128 2129 int errno; 2130 2131 { 2132 switch (errno) { 2133 case XY_ERR_FAIL: case XY_ERR_DERR: case XY_ERR_IPEN: 2134 case XY_ERR_BCFL: case XY_ERR_ICYL: case XY_ERR_ISEC: 2135 case XY_ERR_UIMP: case XY_ERR_SZER: case XY_ERR_ISSZ: 2136 case XY_ERR_SLTA: case XY_ERR_SLTB: case XY_ERR_SLTC: 2137 case XY_ERR_IHED: case XY_ERR_SACK: case XY_ERR_SMAL: 2138 2139 return(XY_ERA_PROG); /* program error ! */ 2140 2141 case XY_ERR_TIMO: case XY_ERR_NHDR: case XY_ERR_HARD: 2142 case XY_ERR_DNRY: case XY_ERR_CHER: case XY_ERR_SEEK: 2143 case XY_ERR_SOFT: 2144 2145 return(XY_ERA_HARD); /* hard error, retry */ 2146 2147 case XY_ERR_DFLT: case XY_ERR_DSEQ: 2148 2149 return(XY_ERA_RSET); /* hard error reset */ 2150 2151 case XY_ERR_SRTR: case XY_ERR_SFOK: case XY_ERR_AOK: 2152 2153 return(XY_ERA_SOFT); /* an FYI error */ 2154 2155 case XY_ERR_WPRO: 2156 2157 return(XY_ERA_WPRO); /* write protect */ 2158 } 2159 2160 return(XY_ERA_PROG); /* ??? */ 2161 } 2162
Indexes created Mon Sep 29 21:09:56 GMT 2025