/* * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: @(#)wd.c 7.2 (Berkeley) 5/9/91 * $Id: wd.c,v 1.34 1994/02/06 17:46:06 mycroft Exp $ */ /* Note: This code heavily modified by tih@barsoom.nhh.no; use at own risk! */ /* The following defines represent only a very small part of the mods, most */ /* of them are not marked in any way. -tih */ #define TIHMODS /* wdopen() workaround, some splx() calls */ #define QUIETWORKS /* define this when wdopen() can actually set DKFL_QUIET */ #define INSTRUMENT /* Add instrumentation stuff by Brad Parker */ #define TIPCAT /* theo says: whatever it is, it looks important! */ /* TODO: peel out buffer at low ipl, speed improvement */ /* TODO: find and fix the timing bugs apparent on some controllers */ #include "wd.h" #if NWDC > 0 #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INSTRUMENT #include #endif #include #include #include #include #include #include #include #include #ifndef WDCNDELAY #define WDCNDELAY 400000 /* delay = 25us; so 10s for a controller state change */ #endif #define WDCDELAY 25 /* if you enable this, it will report any delays more than 25us * N long */ /*#define WDCNDELAY_DEBUG 6 */ #define WDIORETRIES 5 /* number of retries before giving up */ #define wdnoreloc(dev) (minor(dev) & 0x80) /* ignore partition table */ #define wddospart(dev) (minor(dev) & 0x40) /* use dos partitions */ #define wdunit(dev) ((minor(dev) & 0x38) >> 3) #define wdpart(dev) (minor(dev) & 0x7) #define makewddev(maj, unit, part) (makedev(maj,((unit<<3)+part))) #define WDRAW 3 /* 'd' partition isn't a partition! */ #define b_cylin b_resid /* cylinder number for doing IO to */ /* shares an entry in the buf struct */ /* * Drive states. Used to initialize drive. */ #define CLOSED 0 /* disk is closed. */ #define WANTOPEN 1 /* open requested, not started */ #define RECAL 2 /* doing restore */ #define OPEN 3 /* done with open */ /* * The structure of a disk drive. */ struct disk { long dk_bc; /* byte count left */ long dk_bct; /* total byte count left */ short dk_skip; /* blocks already transferred */ short dk_skipm; /* blocks already transferred for multi */ char dk_ctrlr; /* physical controller number */ char dk_unit; /* physical unit number */ char dk_lunit; /* logical unit number */ char dk_state; /* control state */ u_char dk_status; /* copy of status reg. */ u_char dk_error; /* copy of error reg. */ short dk_port; /* i/o port base */ u_long dk_copenpart; /* character units open on this drive */ u_long dk_bopenpart; /* block units open on this drive */ u_long dk_openpart; /* all units open on this drive */ short dk_wlabel; /* label writable? */ short dk_flags; /* drive characteistics found */ #define DKFL_DOSPART 0x00001 /* has DOS partition table */ #define DKFL_QUIET 0x00002 /* report errors back, but don't complain */ #define DKFL_SINGLE 0x00004 /* sector at a time mode */ #define DKFL_ERROR 0x00008 /* processing a disk error */ #define DKFL_BSDLABEL 0x00010 /* has a BSD disk label */ #define DKFL_BADSECT 0x00020 /* has a bad144 badsector table */ #define DKFL_WRITEPROT 0x00040 /* manual unit write protect */ struct wdparams dk_params; /* ESDI/IDE drive/controller parameters */ struct disklabel dk_dd; /* device configuration data */ struct cpu_disklabel dk_cpd; long dk_badsect[127]; /* 126 plus trailing -1 marker */ }; struct board { short dkc_port; }; struct board wdcontroller[NWDC]; struct disk *wddrives[NWD]; /* table of units */ struct buf wdtab[NWDC]; /* various per-controller info */ struct buf wdutab[NWD]; /* head of queue per drive */ struct buf rwdbuf[NWD]; /* buffers for raw IO */ long wdxfer[NWD]; /* count of transfers */ int wdtimeoutstatus[NWD]; /* timeout counters */ int wdprobe(), wdattach(); struct isa_driver wdcdriver = { wdprobe, wdattach, "wdc", }; static void wdustart(struct disk *); static void wdstart(int); static int wdcommand(struct disk *, int); static int wdcontrol(struct buf *); static int wdsetctlr(dev_t, struct disk *); static int wdgetctlr(int, struct disk *); static void bad144intern(struct disk *); static void wddisksort(); static int wdreset(int, int, int); static int wdtimeout(caddr_t); /* * Probe for controller. */ int wdprobe(struct isa_device *dvp) { struct disk *du; int wdc; if (dvp->id_unit >= NWDC) return(0); du = (struct disk *) malloc (sizeof(struct disk), M_TEMP, M_NOWAIT); bzero(du, sizeof(struct disk)); du->dk_ctrlr = dvp->id_unit; du->dk_unit = 0; du->dk_lunit = 0; wdcontroller[dvp->id_unit].dkc_port = dvp->id_iobase; wdc = du->dk_port = dvp->id_iobase; /* check if we have registers that work */ outb(wdc+wd_error, 0x5a); /* error register not writable */ outb(wdc+wd_cyl_lo, 0xa5); /* but all of cyllo are implemented */ if(inb(wdc+wd_error) == 0x5a || inb(wdc+wd_cyl_lo) != 0xa5) goto nodevice; wdreset(dvp->id_unit, wdc, 0); /* execute a controller only command */ if (wdcommand(du, WDCC_DIAGNOSE) < 0) goto nodevice; bzero(&wdtab[du->dk_ctrlr], sizeof(struct buf)); free(du, M_TEMP); return (8); nodevice: free(du, M_TEMP); return (0); } /* * Called for the controller too * Attach each drive if possible. */ int wdattach(struct isa_device *dvp) { int unit, lunit; struct disk *du; if (dvp->id_masunit == -1) return(0); if (dvp->id_masunit >= NWDC) return(0); lunit = dvp->id_unit; if (lunit == -1) { printf("wdc%d: cannot support unit ?\n", dvp->id_masunit); return 0; } if (lunit >= NWD) return(0); unit = dvp->id_physid; du = wddrives[lunit] = (struct disk *) malloc(sizeof(struct disk), M_TEMP, M_NOWAIT); bzero(du, sizeof(struct disk)); bzero(&wdutab[lunit], sizeof(struct buf)); bzero(&rwdbuf[lunit], sizeof(struct buf)); wdxfer[lunit] = 0; wdtimeoutstatus[lunit] = 0; wdtimeout(lunit); du->dk_ctrlr = dvp->id_masunit; du->dk_unit = unit; du->dk_lunit = lunit; du->dk_port = wdcontroller[dvp->id_masunit].dkc_port; if(wdgetctlr(unit, du) == 0) { int i, blank; printf("wd%d at wdc%d targ %d: ", dvp->id_unit, dvp->id_masunit, dvp->id_physid); if(du->dk_params.wdp_heads==0) printf("(unknown size) <"); else printf("%dMB %d cyl, %d head, %d sec <", du->dk_dd.d_ncylinders * du->dk_dd.d_secpercyl / 2048, du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks, du->dk_dd.d_nsectors); for (i=blank=0; idk_params.wdp_model); i++) { char c = du->dk_params.wdp_model[i]; if (!c) break; if (blank && c == ' ') continue; if (blank && c != ' ') { printf(" %c", c); blank = 0; continue; } if (c == ' ') blank = 1; else printf("%c", c); } printf(">\n"); } else { /*printf("wd%d at wdc%d slave %d -- error\n", lunit, dvp->id_masunit, unit);*/ wddrives[lunit] = 0; free(du, M_TEMP); return 0; } return 1; } /* Read/write routine for a buffer. Finds the proper unit, range checks * arguments, and schedules the transfer. Does not wait for the transfer * to complete. Multi-page transfers are supported. All I/O requests must * be a multiple of a sector in length. */ int wdstrategy(register struct buf *bp) { register struct buf *dp; struct disk *du; /* Disk unit to do the IO. */ int lunit = wdunit(bp->b_dev); int s; /* valid unit, controller, and request? */ if (lunit >= NWD || bp->b_blkno < 0 || howmany(bp->b_bcount, DEV_BSIZE) >= (1<b_error = EINVAL; bp->b_flags |= B_ERROR; goto done; } /* "soft" write protect check */ if ((du->dk_flags & DKFL_WRITEPROT) && (bp->b_flags & B_READ) == 0) { bp->b_error = EROFS; bp->b_flags |= B_ERROR; goto done; } /* have partitions and want to use them? */ if ((du->dk_flags & DKFL_BSDLABEL) != 0 && wdpart(bp->b_dev) != WDRAW) { /* * do bounds checking, adjust transfer. if error, process. * if end of partition, just return */ if (bounds_check_with_label(bp, &du->dk_dd, du->dk_wlabel) <= 0) goto done; /* otherwise, process transfer request */ } /* queue transfer on drive, activate drive and controller if idle */ dp = &wdutab[lunit]; s = splbio(); wddisksort(dp, bp); if (dp->b_active == 0) wdustart(du); /* start drive */ if (wdtab[du->dk_ctrlr].b_active == 0) wdstart(du->dk_ctrlr); /* start controller */ splx(s); return 0; done: /* toss transfer, we're done early */ biodone(bp); return 0; } /* * Routine to queue a command to the controller. The unit's * request is linked into the active list for the controller. * If the controller is idle, the transfer is started. */ static void wdustart(register struct disk *du) { register struct buf *bp, *dp = &wdutab[du->dk_lunit]; int ctrlr = du->dk_ctrlr; /* unit already active? */ if (dp->b_active) return; /* anything to start? */ bp = dp->b_actf; if (bp == NULL) return; /* link onto controller queue */ dp->b_forw = NULL; if (wdtab[ctrlr].b_actf == NULL) wdtab[ctrlr].b_actf = dp; else wdtab[ctrlr].b_actl->b_forw = dp; wdtab[ctrlr].b_actl = dp; /* mark the drive unit as busy */ dp->b_active = 1; } /* * Controller startup routine. This does the calculation, and starts * a single-sector read or write operation. Called to start a transfer, * or from the interrupt routine to continue a multi-sector transfer. * RESTRICTIONS: * 1. The transfer length must be an exact multiple of the sector size. */ static void wdstart(int ctrlr) { register struct disk *du; /* disk unit for IO */ register struct buf *bp; struct disklabel *lp; struct buf *dp; long blknum, cylin, head, sector; long secpertrk, secpercyl, addr, timeout; int lunit, wdc; int xfrblknum; unsigned char status; loop: /* is there a drive for the controller to do a transfer with? */ dp = wdtab[ctrlr].b_actf; if (dp == NULL) return; /* is there a transfer to this drive ? if so, link it on the controller's queue */ bp = dp->b_actf; if (bp == NULL) { wdtab[ctrlr].b_actf = dp->b_forw; goto loop; } /* obtain controller and drive information */ lunit = wdunit(bp->b_dev); du = wddrives[lunit]; /* if not really a transfer, do control operations specially */ if (du->dk_state < OPEN) { (void) wdcontrol(bp); return; } /* calculate transfer details */ blknum = bp->b_blkno + du->dk_skip; #ifdef WDDEBUG if (du->dk_skip == 0) printf("\nwdstart %d: %s %d@%d; map ", lunit, (bp->b_flags & B_READ) ? "read" : "write", bp->b_bcount, blknum); else printf(" %d)%x", du->dk_skip, inb(du->dk_port+wd_altsts)); #endif addr = (int) bp->b_un.b_addr; if (du->dk_skip == 0) { du->dk_bc = bp->b_bcount; } if (du->dk_skipm == 0) { struct buf *oldbp, *nextbp; oldbp = bp; nextbp = bp->b_actf; du->dk_bct = du->dk_bc; oldbp->b_flags |= B_XXX; while( nextbp && (oldbp->b_flags & DKFL_SINGLE) == 0 && oldbp->b_dev == nextbp->b_dev && nextbp->b_blkno == (oldbp->b_blkno + (oldbp->b_bcount/DEV_BSIZE)) && (oldbp->b_flags & B_READ) == (nextbp->b_flags & B_READ)) { if( (du->dk_bct+nextbp->b_bcount)/DEV_BSIZE >= 240) { break; } du->dk_bct += nextbp->b_bcount; oldbp->b_flags |= B_XXX; oldbp = nextbp; nextbp = nextbp->b_actf; } } lp = &du->dk_dd; secpertrk = lp->d_nsectors; secpercyl = lp->d_secpercyl; if ((du->dk_flags & DKFL_BSDLABEL) != 0 && wdpart(bp->b_dev) != WDRAW) blknum += lp->d_partitions[wdpart(bp->b_dev)].p_offset; cylin = blknum / secpercyl; head = (blknum % secpercyl) / secpertrk; sector = blknum % secpertrk; /* Check for bad sectors if we have them, and not formatting */ /* Only do this in single-sector mode, or when starting a */ /* multiple-sector transfer. */ #ifdef B_FORMAT if ((du->dk_flags & DKFL_BADSECT) && !(bp->b_flags & B_FORMAT) && ((du->dk_skipm == 0) || (du->dk_flags & DKFL_SINGLE))) { #else if ((du->dk_flags & DKFL_BADSECT) && ((du->dk_skipm == 0) || (du->dk_flags & DKFL_SINGLE))) { #endif long blkchk, blkend, blknew; int i; blkend = blknum + howmany(du->dk_bct, DEV_BSIZE) - 1; for (i = 0; (blkchk = du->dk_badsect[i]) != -1; i++) { if (blkchk > blkend) { break; /* transfer is completely OK; done */ } else if (blkchk == blknum) { blknew = lp->d_secperunit - lp->d_nsectors - i - 1; cylin = blknew / secpercyl; head = (blknew % secpercyl) / secpertrk; sector = blknew % secpertrk; du->dk_flags |= DKFL_SINGLE; /* found and replaced first blk of transfer; done */ break; } else if (blkchk > blknum) { du->dk_flags |= DKFL_SINGLE; break; /* bad block inside transfer; done */ } } } if( du->dk_flags & DKFL_SINGLE) { du->dk_bct = du->dk_bc; du->dk_skipm = du->dk_skip; } #ifdef WDDEBUG pg("c%d h%d s%d ", cylin, head, sector); #endif sector += 1; /* sectors begin with 1, not 0 */ wdtab[ctrlr].b_active = 1; /* mark controller active */ wdc = du->dk_port; #ifdef INSTRUMENT /* instrumentation */ if (du->dk_unit >= 0 && du->dk_skip == 0) { dk_busy |= 1 << du->dk_lunit; dk_wds[du->dk_lunit] += bp->b_bcount >> 6; } if (du->dk_unit >= 0 && du->dk_skipm == 0) { ++dk_seek[du->dk_lunit]; ++dk_xfer[du->dk_lunit]; } #endif retry: /* if starting a multisector transfer, or doing single transfers */ if (du->dk_skipm == 0 || (du->dk_flags & DKFL_SINGLE)) { if (wdtab[ctrlr].b_errcnt && (bp->b_flags & B_READ) == 0) { du->dk_bc += DEV_BSIZE; du->dk_bct += DEV_BSIZE; } /* controller idle? */ for (timeout=0; inb(wdc+wd_status) & WDCS_BUSY; ) { DELAY(WDCDELAY); if (++timeout < WDCNDELAY) continue; wdreset(ctrlr, wdc, 1); break; } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout); #endif /* stuff the task file */ outb(wdc+wd_precomp, lp->d_precompcyl / 4); #ifdef B_FORMAT if (bp->b_flags & B_FORMAT) { outb(wdc+wd_sector, lp->d_gap3); outb(wdc+wd_seccnt, lp->d_nsectors); } else { if (du->dk_flags & DKFL_SINGLE) outb(wdc+wd_seccnt, 1); else outb(wdc+wd_seccnt, howmany(du->dk_bct, DEV_BSIZE)); outb(wdc+wd_sector, sector); } #else if (du->dk_flags & DKFL_SINGLE) outb(wdc+wd_seccnt, 1); else outb(wdc+wd_seccnt, howmany(du->dk_bct, DEV_BSIZE)); outb(wdc+wd_sector, sector); #endif outb(wdc+wd_cyl_lo, cylin); outb(wdc+wd_cyl_hi, cylin >> 8); /* set up the SDH register (select drive) */ outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit<<4) | (head & 0xf)); /* wait for drive to become ready */ for (timeout=0; (inb(wdc+wd_status) & WDCS_READY) == 0; ) { DELAY(WDCDELAY); if (++timeout < WDCNDELAY) continue; wdreset(ctrlr, wdc, 1); goto retry; } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout); #endif /* initiate command! */ #ifdef B_FORMAT if (bp->b_flags & B_FORMAT) outb(wdc+wd_command, WDCC_FORMAT); else outb(wdc+wd_command, (bp->b_flags & B_READ)? WDCC_READ : WDCC_WRITE); #else outb(wdc+wd_command, (bp->b_flags & B_READ)? WDCC_READ : WDCC_WRITE); #endif #ifdef WDDEBUG printf("sector %d cylin %d head %d addr %x sts %x\n", sector, cylin, head, addr, inb(wdc+wd_altsts)); #endif } /* if this is a read operation, just go away until it's done. */ if (bp->b_flags & B_READ) { wdtimeoutstatus[lunit] = 2; return; } /* ready to send data? */ for (timeout=0; (inb(wdc+wd_altsts) & WDCS_DRQ) == 0; ) { DELAY(WDCDELAY); if (++timeout < WDCNDELAY) continue; wdreset(ctrlr, wdc, 1); goto retry; } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout); #endif /* then send it! */ outagain: outsw (wdc+wd_data, addr+du->dk_skip * DEV_BSIZE, DEV_BSIZE/sizeof(short)); du->dk_bc -= DEV_BSIZE; du->dk_bct -= DEV_BSIZE; wdtimeoutstatus[lunit] = 2; } /* Interrupt routine for the controller. Acknowledge the interrupt, check for * errors on the current operation, mark it done if necessary, and start * the next request. Also check for a partially done transfer, and * continue with the next chunk if so. */ void wdintr(struct intrframe wdif) { register struct disk *du; register struct buf *bp, *dp; int status, wdc, ctrlr, timeout; ctrlr = wdif.if_vec; if (!wdtab[ctrlr].b_active) { printf("wdc%d: extra interrupt\n", ctrlr); return; } dp = wdtab[ctrlr].b_actf; bp = dp->b_actf; du = wddrives[wdunit(bp->b_dev)]; wdc = du->dk_port; wdtimeoutstatus[wdunit(bp->b_dev)] = 0; #ifdef WDDEBUG printf("I%d ", ctrlr); #endif for (timeout=0; ((status=inb(wdc+wd_status)) & WDCS_BUSY); ) { DELAY(WDCDELAY); if (++timeout < WDCNDELAY/20) continue; wdstart(ctrlr); /* #ifdef WDDEBUG */ printf("wdc%d: timeout in wdintr WDCS_BUSY\n", ctrlr); /* #endif */ } /* is it not a transfer, but a control operation? */ if (du->dk_state < OPEN) { if (wdcontrol(bp)) wdstart(ctrlr); return; } /* have we an error? */ if (status & (WDCS_ERR | WDCS_ECCCOR)) { du->dk_status = status; du->dk_error = inb(wdc + wd_error); #ifdef WDDEBUG printf("status %x error %x\n", status, du->dk_error); #endif if((du->dk_flags & DKFL_SINGLE) == 0) { du->dk_flags |= DKFL_ERROR; goto outt; } #ifdef B_FORMAT if (bp->b_flags & B_FORMAT) { bp->b_flags |= B_ERROR; goto done; } #endif /* error or error correction? */ if (status & WDCS_ERR) { if (++wdtab[ctrlr].b_errcnt < WDIORETRIES) { wdtab[ctrlr].b_active = 0; } else { if((du->dk_flags & DKFL_QUIET) == 0) { diskerr(bp, "wd", "hard error", LOG_PRINTF, du->dk_skip, &du->dk_dd); #ifdef WDDEBUG printf( "status %b error %b\n", status, WDCS_BITS, inb(wdc+wd_error), WDERR_BITS); #endif } bp->b_flags |= B_ERROR; /* flag the error */ } } else if((du->dk_flags & DKFL_QUIET) == 0) { diskerr(bp, "wd", "soft ecc", 0, du->dk_skip, &du->dk_dd); } } outt: /* * If this was a successful read operation, fetch the data. */ if (((bp->b_flags & (B_READ | B_ERROR)) == B_READ) && wdtab[ctrlr].b_active) { int chk, dummy; chk = min(DEV_BSIZE / sizeof(short), du->dk_bc / sizeof(short)); /* ready to receive data? */ for (timeout=0; (inb(wdc+wd_status) & WDCS_DRQ) == 0; ) { DELAY(WDCDELAY); if (++timeout < WDCNDELAY/20) continue; wdstart(ctrlr); /* #ifdef WDDEBUG */ printf("wdc%d: timeout in wdintr WDCS_DRQ\n", ctrlr); /* #endif */ break; } /* suck in data */ insw (wdc+wd_data, (int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE, chk); du->dk_bc -= chk * sizeof(short); du->dk_bct -= chk * sizeof(short); /* for obselete fractional sector reads */ while (chk++ < (DEV_BSIZE / sizeof(short))) insw(wdc+wd_data, &dummy, 1); } wdxfer[du->dk_lunit]++; if (wdtab[ctrlr].b_active) { #ifdef INSTRUMENT if (du->dk_unit >= 0) dk_busy &=~ (1 << du->dk_unit); #endif if ((bp->b_flags & B_ERROR) == 0) { du->dk_skip++; /* Add to succ. sect */ du->dk_skipm++; /* Add to succ. sect for multitransfer */ if (wdtab[ctrlr].b_errcnt && (du->dk_flags & DKFL_QUIET) == 0) diskerr(bp, "wd", "soft error", 0, du->dk_skip, &du->dk_dd); wdtab[ctrlr].b_errcnt = 0; /* see if more to transfer */ if (du->dk_bc > 0 && (du->dk_flags & DKFL_ERROR) == 0) { if( (du->dk_flags & DKFL_SINGLE) || (du->dk_flags & B_READ) == 0) { wdstart(ctrlr); return; /* next chunk is started */ } } else if ((du->dk_flags & (DKFL_SINGLE|DKFL_ERROR)) == DKFL_ERROR) { du->dk_skip = 0; du->dk_skipm = 0; du->dk_flags &= ~DKFL_ERROR; du->dk_flags |= DKFL_SINGLE; wdstart(ctrlr); return; /* redo xfer sector by sector */ } } done: /* done with this transfer, with or without error */ du->dk_flags &= ~DKFL_SINGLE; wdtab[ctrlr].b_errcnt = 0; du->dk_skip = 0; if( du->dk_bct == 0) { wdtab[ctrlr].b_actf = dp->b_forw; du->dk_skipm = 0; dp->b_active = 0; } dp->b_actf = bp->b_actf; dp->b_errcnt = 0; bp->b_resid = 0; bp->b_flags &= ~B_XXX; biodone(bp); } /* anything more on drive queue? */ if (dp->b_actf && du->dk_bct == 0) wdustart(du); /* anything more for controller to do? */ if (wdtab[ctrlr].b_actf) wdstart(ctrlr); if (!wdtab[ctrlr].b_actf) wdtab[ctrlr].b_active = 0; } /* * Initialize a drive. */ int wdopen(dev_t dev, int flags, int fmt, struct proc *p) { register unsigned int lunit; register struct disk *du; int part = wdpart(dev), mask = 1 << part; struct partition *pp; int error = 0; char *msg; lunit = wdunit(dev); if (lunit >= NWD) return (ENXIO); du = wddrives[lunit]; if (du == 0) return (ENXIO); #ifdef QUIETWORKS if (part == WDRAW) du->dk_flags |= DKFL_QUIET; else du->dk_flags &= ~DKFL_QUIET; #else du->dk_flags &= ~DKFL_QUIET; #endif if ((du->dk_flags & DKFL_BSDLABEL) == 0) { du->dk_flags |= DKFL_WRITEPROT; wdutab[lunit].b_actf = NULL; /* * Use the default sizes until we've read the label, * or longer if there isn't one there. */ bzero(&du->dk_dd, sizeof(du->dk_dd)); #undef d_type /* fix goddamn segments.h! XXX */ du->dk_dd.d_type = DTYPE_ST506; du->dk_dd.d_ncylinders = 1024; du->dk_dd.d_secsize = DEV_BSIZE; du->dk_dd.d_ntracks = 8; du->dk_dd.d_nsectors = 17; du->dk_dd.d_secpercyl = 17*8; du->dk_dd.d_secperunit = 17*8*1024; du->dk_state = WANTOPEN; /* read label using "raw" partition */ #if defined(TIHMODS) && defined(garbage) /* wdsetctlr(dev, du); */ /* Maybe do this TIH */ msg = readdisklabel(makewddev(major(dev), wdunit(dev), WDRAW), wdstrategy, &du->dk_dd, &du->dk_cpd); wdsetctlr(dev, du); msg = readdisklabel(makewddev(major(dev), wdunit(dev), WDRAW), wdstrategy, &du->dk_dd, &du->dk_cpd); if (msg) { #ifdef QUIETWORKS if((du->dk_flags & DKFL_QUIET) == 0) { log(LOG_WARNING, "wd%d: cannot find label (%s)\n", lunit, msg); error = EINVAL; /* XXX needs translation */ } #else log(LOG_WARNING, "wd%d: cannot find label (%s)\n", lunit, msg); if(part != WDRAW) { error = EINVAL; /* XXX needs translation */ } #endif goto done; } else { wdsetctlr(dev, du); du->dk_flags |= DKFL_BSDLABEL; du->dk_flags &= ~DKFL_WRITEPROT; if (du->dk_dd.d_flags & D_BADSECT) du->dk_flags |= DKFL_BADSECT; } #else if (msg = readdisklabel(makewddev(major(dev), wdunit(dev), WDRAW), wdstrategy, &du->dk_dd, &du->dk_cpd) ) { if((du->dk_flags & DKFL_QUIET) == 0) { log(LOG_WARNING, "wd%d: cannot find label (%s)\n", lunit, msg); error = EINVAL; /* XXX needs translation */ } goto done; } else { wdsetctlr(dev, du); du->dk_flags |= DKFL_BSDLABEL; du->dk_flags &= ~DKFL_WRITEPROT; if (du->dk_dd.d_flags & D_BADSECT) du->dk_flags |= DKFL_BADSECT; } #endif done: if (error) { return(error); } } if (du->dk_flags & DKFL_BADSECT) bad144intern(du); /* * Warn if a partion is opened * that overlaps another partition which is open * unless one is the "raw" partition (whole disk). */ if ((du->dk_openpart & mask) == 0 /*&& part != RAWPART*/ && part != WDRAW) { int start, end; pp = &du->dk_dd.d_partitions[part]; start = pp->p_offset; end = pp->p_offset + pp->p_size; for (pp = du->dk_dd.d_partitions; pp < &du->dk_dd.d_partitions[du->dk_dd.d_npartitions]; pp++) { if (pp->p_offset + pp->p_size <= start || pp->p_offset >= end) continue; /*if (pp - du->dk_dd.d_partitions == RAWPART) continue; */ if (pp - du->dk_dd.d_partitions == WDRAW) continue; if (du->dk_openpart & (1 << (pp - du->dk_dd.d_partitions))) log(LOG_WARNING, "wd%d%c: overlaps open partition (%c)\n", lunit, part + 'a', pp - du->dk_dd.d_partitions + 'a'); } } if (part >= du->dk_dd.d_npartitions && part != WDRAW) { return (ENXIO); } /* insure only one open at a time */ du->dk_openpart |= mask; switch (fmt) { case S_IFCHR: du->dk_copenpart |= mask; break; case S_IFBLK: du->dk_bopenpart |= mask; break; } return (0); } /* * Implement operations other than read/write. * Called from wdstart or wdintr during opens and formats. * Uses finite-state-machine to track progress of operation in progress. * Returns 0 if operation still in progress, 1 if completed. */ static int wdcontrol(register struct buf *bp) { register struct disk *du; register unit, lunit; unsigned char stat; int s, ctrlr, timeout; int wdc; du = wddrives[wdunit(bp->b_dev)]; ctrlr = du->dk_ctrlr; unit = du->dk_unit; lunit = du->dk_lunit; wdc = du->dk_port; switch (du->dk_state) { tryagainrecal: case WANTOPEN: /* set SDH, step rate, do restore */ #ifdef WDDEBUG printf("wd%d: recal ", lunit); #endif s = splbio(); /* not called from intr level ... */ wdgetctlr(unit, du); #ifdef TIPCAT for (timeout=0; (inb(wdc+wd_status) & WDCS_READY) == 0; ) { DELAY(WDCDELAY); if (++timeout < WDCNDELAY) continue; wdreset(ctrlr, wdc, 1); goto tryagainrecal; } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout); #endif #endif outb(wdc+wd_sdh, WDSD_IBM | (unit << 4)); wdtab[ctrlr].b_active = 1; outb(wdc+wd_command, WDCC_RESTORE | WD_STEP); #ifdef TIPCAT for (timeout=0; (inb(wdc+wd_status) & WDCS_READY) == 0; ) { DELAY(WDCDELAY); if (++timeout < WDCNDELAY) continue; wdreset(ctrlr, wdc, 1); goto tryagainrecal; } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout); #endif #endif du->dk_state = RECAL; splx(s); return(0); case RECAL: if ((stat = inb(wdc+wd_status)) & WDCS_ERR) { if ((du->dk_flags & DKFL_QUIET) == 0) { printf("wd%d: recal", du->dk_lunit); printf(": status %b error %b\n", stat, WDCS_BITS, inb(wdc+wd_error), WDERR_BITS); } if (++wdtab[ctrlr].b_errcnt < WDIORETRIES) goto tryagainrecal; bp->b_error = ENXIO; /* XXX needs translation */ goto badopen; } /* some controllers require this ... */ wdsetctlr(bp->b_dev, du); wdtab[ctrlr].b_errcnt = 0; du->dk_state = OPEN; /* * The rest of the initialization can be done * by normal means. */ return(1); default: panic("wdcontrol"); } /* NOTREACHED */ badopen: if ((du->dk_flags & DKFL_QUIET) == 0) printf(": status %b error %b\n", stat, WDCS_BITS, inb(wdc + wd_error), WDERR_BITS); bp->b_flags |= B_ERROR; return(1); } /* * send a command and wait uninterruptibly until controller is finished. * return -1 if controller busy for too long, otherwise * return status. intended for brief controller commands at critical points. * assumes interrupts are blocked. */ static int wdcommand(struct disk *du, int cmd) { int timeout, stat, wdc; /*DELAY(2000);*/ wdc = du->dk_port; /* controller ready for command? */ for (timeout=0; (stat=inb(wdc+wd_status)) & WDCS_BUSY; ) { DELAY(WDCDELAY); if(++timeout > WDCNDELAY) return -1; } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout); #endif /* send command, await results */ outb(wdc+wd_command, cmd); for (timeout=0; (stat=inb(wdc+wd_status)) & WDCS_BUSY; ) { DELAY(WDCDELAY); if(++timeout > WDCNDELAY) return -1; } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout); #endif if (cmd != WDCC_READP) return (stat); /* is controller ready to return data? */ for (timeout=0; ((stat=inb(wdc+wd_status)) & (WDCS_ERR|WDCS_DRQ)) == 0; ) { DELAY(WDCDELAY); if(++timeout > WDCNDELAY) return -1; } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout); #endif return (stat); } /* * issue IDC to drive to tell it just what geometry it is to be. */ static int wdsetctlr(dev_t dev, struct disk *du) { int stat, x, wdc; /* printf("wd(%d,%d) C%dH%dS%d\n", du->dk_ctrlr, du->dk_unit, du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks, du->dk_dd.d_nsectors); */ wdc = du->dk_port; /*DELAY(2000);*/ x = splbio(); outb(wdc+wd_cyl_lo, du->dk_dd.d_ncylinders); /* TIH: was ...ders+1 */ outb(wdc+wd_cyl_hi, (du->dk_dd.d_ncylinders)>>8); /* TIH: was ...ders+1 */ outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit << 4) + du->dk_dd.d_ntracks-1); outb(wdc+wd_seccnt, du->dk_dd.d_nsectors); stat = wdcommand(du, WDCC_IDC); #ifndef TIHMODS if (stat < 0) return(stat); #endif if (stat & WDCS_ERR) printf("wdsetctlr: status %b error %b\n", stat, WDCS_BITS, inb(wdc+wd_error), WDERR_BITS); splx(x); return(stat); } /* * issue READP to drive to ask it what it is. */ static int wdgetctlr(int u, struct disk *du) { int stat, x, i, wdc; char tb[DEV_BSIZE]; struct wdparams *wp; int timeout; x = splbio(); /* not called from intr level ... */ wdc = du->dk_port; #ifdef TIPCAT for (timeout=0; (inb(wdc+wd_status) & WDCS_BUSY); ) { DELAY(WDCDELAY); if(++timeout > WDCNDELAY) { splx(x); return -1; } } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout); #endif #endif outb(wdc+wd_sdh, WDSD_IBM | (u << 4)); #ifdef TIPCAT for (timeout=0; (inb(wdc+wd_status) & WDCS_READY) == 0; ) { DELAY(WDCDELAY); if(++timeout > WDCNDELAY) { splx(x); return -1; } } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout); #endif #endif stat = wdcommand(du, WDCC_READP); #ifdef TIPCAT for (timeout=0; (inb(wdc+wd_status) & WDCS_READY) == 0; ) { DELAY(WDCDELAY); if(++timeout > WDCNDELAY) { splx(x); return -1; } } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout); #endif #endif #ifndef TIHMODS if (stat < 0) return(stat); #else if (stat < 0) { splx(x); return(stat); } #endif if( (stat & WDCS_ERR) == 0) { /* obtain parameters */ wp = &du->dk_params; insw(wdc+wd_data, tb, sizeof(tb)/sizeof(short)); bcopy(tb, wp, sizeof(struct wdparams)); /* shuffle string byte order */ for (i=0; i < sizeof(wp->wdp_model); i+=2) { u_short *p; p = (u_short *) (wp->wdp_model + i); *p = ntohs(*p); } strncpy(du->dk_dd.d_typename, "ESDI/IDE", sizeof du->dk_dd.d_typename); du->dk_dd.d_type = DTYPE_ESDI; bcopy(wp->wdp_model+20, du->dk_dd.d_packname, 14-1); /* update disklabel given drive information */ du->dk_dd.d_ncylinders = wp->wdp_fixedcyl + wp->wdp_removcyl /*+- 1*/; du->dk_dd.d_ntracks = wp->wdp_heads; du->dk_dd.d_nsectors = wp->wdp_sectors; du->dk_dd.d_secpercyl = du->dk_dd.d_ntracks * du->dk_dd.d_nsectors; du->dk_dd.d_partitions[1].p_size = du->dk_dd.d_secpercyl * wp->wdp_sectors; du->dk_dd.d_partitions[1].p_offset = 0; } else { /* * If WDCC_READP fails then we might have an old drive * so we try a seek to 0; if that passes then the * drive is there but it's OLD AND KRUSTY. */ stat = wdcommand(du, WDCC_RESTORE | WD_STEP); if(stat & WDCS_ERR) { splx(x); return(inb(wdc+wd_error)); } strncpy(du->dk_dd.d_typename, "ST506", sizeof du->dk_dd.d_typename); strncpy(du->dk_params.wdp_model, "Unknown Type", sizeof du->dk_params.wdp_model); du->dk_dd.d_type = DTYPE_ST506; } #if 0 printf("gc %x cyl %d trk %d sec %d type %d sz %d model %s\n", wp->wdp_config, wp->wdp_fixedcyl+wp->wdp_removcyl, wp->wdp_heads, wp->wdp_sectors, wp->wdp_cntype, wp->wdp_cnsbsz, wp->wdp_model); #endif /* better ... */ du->dk_dd.d_subtype |= DSTYPE_GEOMETRY; /* XXX sometimes possibly needed */ (void) inb(wdc+wd_status); #ifdef TIHMODS splx(x); #endif return (0); } /* ARGSUSED */ int wdclose(dev_t dev, int flags, int fmt) { register struct disk *du; int part = wdpart(dev), mask = 1 << part; du = wddrives[wdunit(dev)]; /* insure only one open at a time */ du->dk_openpart &= ~mask; switch (fmt) { case S_IFCHR: du->dk_copenpart &= ~mask; break; case S_IFBLK: du->dk_bopenpart &= ~mask; break; } return(0); } int wdioctl(dev_t dev, int cmd, caddr_t addr, int flag) { int lunit = wdunit(dev); register struct disk *du; int error = 0; struct uio auio; struct iovec aiov; du = wddrives[lunit]; switch (cmd) { case DIOCSBAD: if ((flag & FWRITE) == 0) error = EBADF; else { du->dk_cpd.bad = *(struct dkbad *)addr; bad144intern(du); } break; case DIOCGDINFO: *(struct disklabel *)addr = du->dk_dd; break; case DIOCGPART: ((struct partinfo *)addr)->disklab = &du->dk_dd; ((struct partinfo *)addr)->part = &du->dk_dd.d_partitions[wdpart(dev)]; break; case DIOCSDINFO: if ((flag & FWRITE) == 0) error = EBADF; else { error = setdisklabel(&du->dk_dd, (struct disklabel *)addr, /*(du->dk_flags&DKFL_BSDLABEL) ? du->dk_openpart : */0, &du->dk_cpd); } if (error == 0) { du->dk_flags |= DKFL_BSDLABEL; wdsetctlr(dev, du); } break; case DIOCWLABEL: du->dk_flags &= ~DKFL_WRITEPROT; if ((flag & FWRITE) == 0) error = EBADF; else du->dk_wlabel = *(int *)addr; break; case DIOCWDINFO: du->dk_flags &= ~DKFL_WRITEPROT; if ((flag & FWRITE) == 0) error = EBADF; else if ((error = setdisklabel(&du->dk_dd, (struct disklabel *)addr, /*(du->dk_flags & DKFL_BSDLABEL) ? du->dk_openpart :*/ 0, &du->dk_cpd)) == 0) { int wlab; du->dk_flags |= DKFL_BSDLABEL; wdsetctlr(dev, du); /* simulate opening partition 0 so write succeeds */ du->dk_openpart |= (1 << 0); /* XXX */ wlab = du->dk_wlabel; du->dk_wlabel = 1; error = writedisklabel(dev, wdstrategy, &du->dk_dd, &du->dk_cpd); du->dk_openpart = du->dk_copenpart | du->dk_bopenpart; du->dk_wlabel = wlab; } break; #ifdef notyet case DIOCGDINFOP: *(struct disklabel **)addr = &(du->dk_dd); break; case DIOCWFORMAT: if ((flag & FWRITE) == 0) error = EBADF; else { register struct format_op *fop; fop = (struct format_op *)addr; aiov.iov_base = fop->df_buf; aiov.iov_len = fop->df_count; auio.uio_iov = &aiov; auio.uio_iovcnt = 1; auio.uio_resid = fop->df_count; auio.uio_segflg = 0; auio.uio_offset = fop->df_startblk * du->dk_dd.d_secsize; error = physio(wdformat, &rwdbuf[lunit], dev, B_WRITE, minphys, &auio); fop->df_count -= auio.uio_resid; fop->df_reg[0] = du->dk_status; fop->df_reg[1] = du->dk_error; } break; #endif default: error = ENOTTY; break; } return (error); } #ifdef B_FORMAT int wdformat(struct buf *bp) { bp->b_flags |= B_FORMAT; return (wdstrategy(bp)); } #endif int wdsize(dev_t dev) { int lunit = wdunit(dev), part = wdpart(dev); struct disk *du; if (lunit >= NWD) return(-1); if ((du = wddrives[lunit]) == 0) return (-1); if (du->dk_state < OPEN || (du->dk_flags & DKFL_BSDLABEL) == 0) { int val; val = wdopen(makewddev(major(dev), lunit, WDRAW), FREAD, S_IFBLK, 0); if (val != 0) return (-1); } if ((du->dk_flags & (DKFL_WRITEPROT|DKFL_BSDLABEL)) != DKFL_BSDLABEL) return (-1); else return((int)du->dk_dd.d_partitions[part].p_size); } extern char *vmmap; /* poor name! */ /* dump core after a system crash */ int wddump(dev_t dev) { register struct disk *du; /* disk unit to do the IO */ long num; /* number of sectors to write */ int ctrlr, lunit, part, wdc; long blkoff, blknum; long cylin, head, sector, stat; long secpertrk, secpercyl, nblocks, i; char *addr; static wddoingadump = 0; extern caddr_t CADDR1; extern struct pte *CMAP1; addr = (char *) 0; /* starting address */ #if DO_NOT_KNOW_HOW /* toss any characters present prior to dump, ie. non-blocking getc */ while (cngetc()) ; #endif /* size of memory to dump */ lunit = wdunit(dev); /* eventually support floppies? */ part = wdpart(dev); /* file system */ /* check for acceptable drive number */ if (lunit >= NWD) return(ENXIO); du = wddrives[lunit]; if (du == 0) return(ENXIO); /* was it ever initialized ? */ if (du->dk_state < OPEN) return (ENXIO); if (du->dk_flags & DKFL_WRITEPROT) return(ENXIO); wdc = du->dk_port; ctrlr = du->dk_ctrlr; /* Convert to disk sectors */ num = ctob(physmem) / du->dk_dd.d_secsize; /* check if controller active */ /*if (wdtab[ctrlr].b_active) return(EFAULT); */ if (wddoingadump) return(EFAULT); secpertrk = du->dk_dd.d_nsectors; secpercyl = du->dk_dd.d_secpercyl; nblocks = du->dk_dd.d_partitions[part].p_size; blkoff = du->dk_dd.d_partitions[part].p_offset; /*pg("xunit %x, nblocks %d, dumplo %d num %d\n", part,nblocks,dumplo,num);*/ /* check transfer bounds against partition size */ if ((dumplo < 0) || ((dumplo + num) > nblocks)) return(EINVAL); /* mark controller active for if we panic during the dump */ /* wdtab[ctrlr].b_active = 1; */ wddoingadump = 1; i = 200000000; while ((inb(wdc+wd_status) & WDCS_BUSY) && (i-- > 0)) ; outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit << 4)); outb(wdc+wd_command, WDCC_RESTORE | WD_STEP); while (inb(wdc+wd_status) & WDCS_BUSY) ; /* some compaq controllers require this ... */ wdsetctlr(dev, du); blknum = dumplo + blkoff; while (num > 0) { #ifdef __notdef__ /* cannot use this since this address was mapped differently */ pmap_enter(kernel_pmap, CADDR1, trunc_page(addr), VM_PROT_READ, TRUE); #else *(int *)CMAP1 = PG_V | PG_KW | ctob((long)addr); tlbflush(); #endif /* compute disk address */ cylin = blknum / secpercyl; head = (blknum % secpercyl) / secpertrk; sector = blknum % secpertrk; if (du->dk_flags & DKFL_BADSECT) { long newblk; int i; for (i = 0; du->dk_badsect[i] != -1; i++) { if (blknum < du->dk_badsect[i]) { break; /* sorted list, passed our block by */ } else if (blknum == du->dk_badsect[i]) { newblk = du->dk_dd.d_secperunit - du->dk_dd.d_nsectors - i - 1; cylin = newblk / secpercyl; head = (newblk % secpercyl) / secpertrk; sector = newblk % secpertrk; /* found and repl; done scanning bad144 table */ break; } } } sector++; /* origin 1 */ /* select drive. */ outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit<<4) | (head & 0xf)); while ((inb(wdc+wd_status) & WDCS_READY) == 0) ; /* transfer some blocks */ outb(wdc+wd_sector, sector); outb(wdc+wd_seccnt,1); outb(wdc+wd_cyl_lo, cylin); outb(wdc+wd_cyl_hi, cylin >> 8); #ifdef notdef /* lets just talk about this first...*/ pg ("sdh 0%o sector %d cyl %d addr 0x%x", inb(wdc+wd_sdh), inb(wdc+wd_sector), inb(wdc+wd_cyl_hi)*256+inb(wdc+wd_cyl_lo), addr); #endif outb(wdc+wd_command, WDCC_WRITE); /* Ready to send data? */ while ((inb(wdc+wd_status) & WDCS_DRQ) == 0) ; if (inb(wdc+wd_status) & WDCS_ERR) return(EIO); outsw (wdc+wd_data, CADDR1+((int)addr&(NBPG-1)), 256); if (inb(wdc+wd_status) & WDCS_ERR) return(EIO); /* Check data request (should be done). */ if (inb(wdc+wd_status) & WDCS_DRQ) return(EIO); /* wait for completion */ for (i=200000000; inb(wdc+wd_status) & WDCS_BUSY ; i--) { if (i < 0) return (EIO); } /* error check the xfer */ if (inb(wdc+wd_status) & WDCS_ERR) return(EIO); if ((unsigned)addr % (1024*1024) == 0) printf("%d ", num/2048); /* update block count */ num--; blknum++; (int) addr += 512; #if DO_NOT_KNOW_HOW /* operator aborting dump? non-blocking getc() */ if (cngetc()) return(EINTR); #endif } return(0); } #endif /* * Internalize the bad sector table. */ void bad144intern(struct disk *du) { int i; if (du->dk_flags & DKFL_BADSECT) { for (i = 0; i < 127; i++) { du->dk_badsect[i] = -1; } for (i = 0; i < 126; i++) { if (du->dk_cpd.bad.bt_bad[i].bt_cyl == 0xffff) { break; } else { du->dk_badsect[i] = du->dk_cpd.bad.bt_bad[i].bt_cyl * du->dk_dd.d_secpercyl + (du->dk_cpd.bad.bt_bad[i].bt_trksec >> 8) * du->dk_dd.d_nsectors + (du->dk_cpd.bad.bt_bad[i].bt_trksec & 0x00ff); } } } } /* this routine was adopted from the kernel sources */ /* more efficient because b_cylin is not really as useful at this level */ /* so I eliminate the processing, I believe that sorting the sectors */ /* is adequate */ void wddisksort(struct buf *dp, struct buf *bp) { register struct buf *ap; /* * If nothing on the activity queue, then * we become the only thing. */ ap = dp->b_actf; if (ap == NULL) { dp->b_actb = &dp->b_actf; /* XXX */ bp->b_actf = NULL; bp->b_actb = dp->b_actb; *dp->b_actb = bp; dp->b_actb = &bp->b_actf; return; } while (ap->b_flags & B_XXX) { if (ap->b_actf == 0 || (ap->b_actf->b_flags & B_XXX) == 0) break; ap = ap->b_actf; } /* * If we lie after the first (currently active) * request, then we must locate the second request list * and add ourselves to it. */ if (bp->b_blkno < ap->b_blkno) { while (ap->b_actf) { /* * Check for an ``inversion'' in the * normally ascending cylinder numbers, * indicating the start of the second request list. */ if (ap->b_actf->b_blkno < ap->b_blkno) { /* * Search the second request list * for the first request at a larger * cylinder number. We go before that; * if there is no such request, we go at end. */ do { if (bp->b_blkno < ap->b_actf->b_blkno) goto insert; ap = ap->b_actf; } while (ap->b_actf); goto insert; /* after last */ } ap = ap->b_actf; } /* * No inversions... we will go after the last, and * be the first request in the second request list. */ goto insert; } /* * Request is at/after the current request... * sort in the first request list. */ while (ap->b_actf) { /* * We want to go after the current request * if there is an inversion after it (i.e. it is * the end of the first request list), or if * the next request is a larger cylinder than our request. */ if (ap->b_actf->b_blkno < ap->b_blkno || bp->b_blkno < ap->b_actf->b_blkno ) goto insert; ap = ap->b_actf; } /* * Neither a second list nor a larger * request... we go at the end of the first list, * which is the same as the end of the whole schebang. */ insert: if (bp->b_actf = ap->b_actf) bp->b_actf->b_actb = &bp->b_actf; else dp->b_actb = &bp->b_actf; ap->b_actf = bp; bp->b_actb = &ap->b_actf; } static int wdreset(int ctrlr, int wdc, int err) { int stat, timeout; if(err) printf("wdc%d: busy too long, resetting\n", ctrlr); /* reset the device */ outb(wdc+wd_ctlr, (WDCTL_RST|WDCTL_IDS)); DELAY(1000); outb(wdc+wd_ctlr, WDCTL_4BIT); for (timeout=0; (stat=inb(wdc+wd_status)) & WDCS_BUSY; ) { DELAY(WDCDELAY); if(++timeout > WDCNDELAY) { printf("wdc%d: failed to reset controller\n", ctrlr); break; } } #ifdef WDCNDELAY_DEBUG if(timeout>WDCNDELAY_DEBUG) printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout); #endif } static int wdtimeout(caddr_t arg) { int x = splbio(); register int unit = (int) arg; if (wdtimeoutstatus[unit]) { if (--wdtimeoutstatus[unit] == 0) { struct disk *du = wddrives[unit]; int wdc = du->dk_port; /* #ifdef WDDEBUG */ printf("wd%d: lost interrupt - status %x, error %x\n", unit, inb(wdc+wd_status), inb(wdc+wd_error)); /* #endif */ outb(wdc+wd_ctlr, (WDCTL_RST|WDCTL_IDS)); DELAY(1000); outb(wdc+wd_ctlr, WDCTL_IDS); DELAY(1000); (void) inb(wdc+wd_error); outb(wdc+wd_ctlr, WDCTL_4BIT); du->dk_skip = 0; du->dk_flags |= DKFL_SINGLE; wdstart(du->dk_ctrlr); /* start controller */ } } timeout((timeout_t)wdtimeout, (caddr_t)unit, 50); splx(x); return (0); }