#define WD_COUNT_RETRIES static int wdtest = 0; /*- * 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 1.45 1994/08/30 14:26:13 ache Exp $ */ /* TODO: * o Bump error count after timeout. * o Satisfy ATA timing in all cases. * o Finish merging berry/sos timeout code (bump error count...). * o Merge/fix TIH/NetBSD bad144 code. * o Merge/fix Dyson/NetBSD clustering code. * o Don't use polling except for initialization. Need to * reorganize the state machine. Then "extra" interrupts * shouldn't happen (except maybe one for initialization). * o Fix disklabel, boot and driver inconsistencies with * bad144 in standard versions. * o Support extended DOS partitions. * o Support swapping to DOS partitions. * o Look at latest linux clustering methods. Our disksort() * gets in the way of clustering. * o Handle bad sectors, clustering, disklabelling, DOS * partitions and swapping driver-independently. Use * i386/dkbad.c for bad sectors. Swapping will need new * driver entries for polled reinit and polled write). */ #include "wd.h" #if NWDC > 0 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define TIMEOUT 10000 #define RETRIES 5 /* number of retries before giving up */ #define RECOVERYTIME 500000 /* usec for controller to recover after err */ #define MAXTRANSFER 255 /* max size of transfer in sectors */ /* correct max is 256 but some controllers */ /* can't handle that in all cases */ #define BAD144_NO_CYL 0xffff /* XXX should be in dkbad.h; bad144.c uses -1 */ #ifdef notyet #define wdnoreloc(dev) (minor(dev) & 0x80) /* ignore partition table */ #endif #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 /* XXX must be 2 */ /* Cylinder number for doing IO to. Shares an entry in the buf struct. */ #define b_cylin b_resid /* * This biotab field doubles as a field for the physical unit number on * the controller. */ #define id_physid id_scsiid /* * 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 */ short dk_skip; /* blocks already transferred */ 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. */ u_char dk_timeout; /* countdown to next timeout */ 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_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 */ #define DKFL_LABELLING 0x00080 /* readdisklabel() in progress */ struct wdparams dk_params; /* ESDI/IDE drive/controller parameters */ struct disklabel dk_dd; /* device configuration data */ struct disklabel dk_dd2; /* DOS view converted to label */ struct dos_partition dk_dospartitions[NDOSPART]; /* DOS view of disk */ struct dkbad dk_bad; /* bad sector table */ long dk_badsect[127]; /* 126 plus trailing -1 marker */ }; static struct disk *wddrives[NWD]; /* table of units */ static struct buf wdtab[NWDC]; static struct buf wdutab[NWD]; /* head of queue per drive */ #ifdef notyet static struct buf rwdbuf[NWD]; /* buffers for raw IO */ #endif static long wdxfer[NWD]; /* count of transfers */ static void bad144intern(struct disk *); static int wdprobe(struct isa_device *dvp); static int wdattach(struct isa_device *dvp); static void wdustart(struct disk *du); static void wdstart(int ctrlr); static int wdcontrol(struct buf *bp); static int wdcommand(struct disk *du, u_int cylinder, u_int head, u_int sector, u_int count, u_int command); static int wdsetctlr(struct disk *du); static int wdwsetctlr(struct disk *du); static int wdgetctlr(struct disk *du); static void wderror(struct buf *bp, struct disk *du, char *mesg); static void wdflushirq(struct disk *du, int old_ipl); static int wdreset(struct disk *du); static void wdsleep(int ctrlr, char *wmesg); static timeout_t wdtimeout; static int wdunwedge(struct disk *du); static int wdwait(struct disk *du, u_char bits_wanted, int timeout); struct isa_driver wdcdriver = { wdprobe, wdattach, "wdc", }; extern char *readdisklabel(); /* * Probe for controller. */ static int wdprobe(struct isa_device *dvp) { int unit = dvp->id_unit; struct disk *du; if (unit >= NWDC) return (0); du = malloc(sizeof *du, M_TEMP, M_NOWAIT); if (du == NULL) return (0); bzero(du, sizeof *du); du->dk_ctrlr = dvp->id_unit; du->dk_port = dvp->id_iobase; /* check if we have registers that work */ outb(du->dk_port + wd_cyl_lo, 0xa5); /* wd_cyl_lo is read/write */ if (inb(du->dk_port + wd_cyl_lo) != 0xa5) goto nodevice; if (wdreset(du) != 0 && (DELAY(RECOVERYTIME), wdreset(du)) != 0) goto nodevice; /* execute a controller only command */ if (wdcommand(du, 0, 0, 0, 0, WDCC_DIAGNOSE) != 0 || wdwait(du, 0, TIMEOUT) < 0) goto nodevice; /* * drive(s) did not time out during diagnostic : * Get error status and check that both drives are OK. * Table 9-2 of ATA specs suggests that we must check for * a value of 0x01 * * Strangely, some controllers will return a status of * 0x81 (drive 0 OK, drive 1 failure), and then when * the DRV bit is set, return status of 0x01 (OK) for * drive 2. (This seems to contradict the ATA spec.) */ du->dk_error = inb(du->dk_port + wd_error); /* printf("Error : %x\n", du->dk_error); */ if(du->dk_error != 0x01) { if(du->dk_error & 0x80) { /* drive 1 failure */ /* first set the DRV bit */ u_int sdh; sdh = inb(du->dk_port+ wd_sdh); sdh = sdh | 0x10; outb(du->dk_port+ wd_sdh, sdh); /* Wait, to make sure drv 1 has completed diags */ if ( wdwait(du, 0, TIMEOUT) < 0) goto nodevice; /* Get status for drive 1 */ du->dk_error = inb(du->dk_port + wd_error); /* printf("Error (drv 1) : %x\n", du->dk_error); */ if(du->dk_error != 0x01) goto nodevice; } else /* drive 0 fail */ goto nodevice; } free(du, M_TEMP); return (IO_WDCSIZE); nodevice: free(du, M_TEMP); return (0); } /* * Attach each drive if possible. */ static int wdattach(struct isa_device *dvp) { int unit, lunit; struct isa_device *wdup; struct disk *du; if (dvp->id_unit >= NWDC) return (0); for (wdup = isa_biotab_wdc; wdup->id_driver != 0; wdup++) { if (wdup->id_iobase != dvp->id_iobase) continue; lunit = wdup->id_unit; if (lunit >= NWD) continue; unit = wdup->id_physid; du = malloc(sizeof *du, M_TEMP, M_NOWAIT); if (du == NULL) continue; if (wddrives[lunit] != NULL) panic("drive attached twice"); wddrives[lunit] = du; bzero(du, sizeof *du); du->dk_ctrlr = dvp->id_unit; du->dk_unit = unit; du->dk_lunit = lunit; du->dk_port = dvp->id_iobase; /* * Print out description of drive. * wdp_model can be [0..40] bytes, thus \0 can be missing so * so copy it and add a null before printing. */ if (wdgetctlr(du) == 0) { char buf[sizeof(du->dk_params.wdp_model) + 1]; bcopy(du->dk_params.wdp_model, buf, sizeof(buf)-1); buf[sizeof(buf)-1] = '\0'; printf("wdc%d: unit %d (wd%d): <%s>\n", dvp->id_unit, unit, lunit, buf); if (du->dk_params.wdp_heads == 0) printf("wd%d: size unknown\n", lunit); else printf("wd%d: %luMB (%lu total sec), ", lunit, du->dk_dd.d_secperunit * du->dk_dd.d_secsize / (1024 * 1024), du->dk_dd.d_secperunit); printf("%lu cyl, %lu head, %lu sec, bytes/sec %lu\n", du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks, du->dk_dd.d_nsectors, du->dk_dd.d_secsize); /* * Start timeout routine for this drive. * XXX timeout should be per controller. */ wdtimeout((caddr_t)du); } else { free(du, M_TEMP); wddrives[lunit] = NULL; } } /* * Discard any interrupts generated by wdgetctlr(). wdflushirq() * doesn't work now because the ambient ipl is too high. */ wdtab[dvp->id_unit].b_active = 2; 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. */ void wdstrategy(register struct buf *bp) { register struct buf *dp; struct disk *du; int lunit = wdunit(bp->b_dev); int s; /* valid unit, controller, and request? */ if (lunit >= NWD || bp->b_blkno < 0 || (du = wddrives[lunit]) == NULL) { bp->b_error = EINVAL; bp->b_flags |= B_ERROR; goto done; } #if !defined(DISKLABEL_UNPROTECTED) /* "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; } #endif /* !defined(DISKLABEL_UNPROTECTED) */ /* * Do bounds checking, adjust transfer, and set b_cylin. */ if (bounds_check_with_label(bp, wddospart(bp->b_dev) ? &du->dk_dd2 : &du->dk_dd, du->dk_wlabel) <= 0) goto done; /* * Check for *any* block on this transfer being on the bad block list * if it is, then flag the block as a transfer that requires * bad block handling. Also, used as a hint for low level disksort * clustering code to keep from coalescing a bad transfer into * a normal transfer. Single block transfers for a large number of * blocks associated with a cluster I/O are undersirable. */ if( du->dk_flags & DKFL_BADSECT) { int i; int nsecs = howmany(bp->b_bcount, DEV_BSIZE); int blkend = bp->b_pblkno + nsecs; for(i=0;du->dk_badsect[i] != -1 && du->dk_badsect[i] < blkend;i++) { if( du->dk_badsect[i] >= bp->b_pblkno) { bp->b_flags |= B_BAD; break; } } } /* queue transfer on drive, activate drive and controller if idle */ dp = &wdutab[lunit]; s = splbio(); /* cldisksort(dp, bp, 254*DEV_BSIZE); */ disksort(dp, bp); if (dp->b_active == 0) wdustart(du); /* start drive */ /* Pick up changes made by readdisklabel(). */ if (du->dk_flags & DKFL_LABELLING && du->dk_state > RECAL) { wdsleep(du->dk_ctrlr, "wdlab"); du->dk_state = WANTOPEN; } if (wdtab[du->dk_ctrlr].b_active == 0) wdstart(du->dk_ctrlr); /* start controller */ splx(s); return; done: s = splbio(); /* toss transfer, we're done early */ biodone(bp); splx(s); } /* * 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; dp->b_actf = bp->b_actf; bp->b_actf = NULL; /* link onto controller queue */ if (wdtab[ctrlr].b_actf == NULL) { wdtab[ctrlr].b_actf = bp; } else { *wdtab[ctrlr].b_actb = bp; } wdtab[ctrlr].b_actb = &bp->b_actf; /* 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; register struct buf *bp; struct disklabel *lp; struct buf *dp; register struct bt_bad *bt_ptr; long blknum, cylin, head, sector; long secpertrk, secpercyl; int lunit; loop: /* is there a drive for the controller to do a transfer with? */ bp = wdtab[ctrlr].b_actf; if (bp == NULL) return; /* 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) { if (du->dk_state != WANTOPEN) printf("wd%d: wdstart: weird dk_state %d\n", du->dk_lunit, du->dk_state); if (wdcontrol(bp) != 0) printf("wd%d: wdstart: wdcontrol returned nonzero, state = %d\n", du->dk_lunit, du->dk_state); return; } /* calculate transfer details */ blknum = bp->b_pblkno + du->dk_skip; #ifdef WDDEBUG if (du->dk_skip == 0) printf("wd%d: wdstart: %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 lp = &du->dk_dd; secpertrk = lp->d_nsectors; secpercyl = lp->d_secpercyl; if (du->dk_skip == 0) { du->dk_bc = bp->b_bcount; if (bp->b_flags & B_BAD /* * XXX handle large transfers inefficiently instead * of crashing on them. */ || howmany(du->dk_bc, DEV_BSIZE) > MAXTRANSFER) du->dk_flags |= DKFL_SINGLE; } if ((du->dk_flags & (DKFL_SINGLE|DKFL_BADSECT)) /* 19 Aug 92*/ == (DKFL_SINGLE|DKFL_BADSECT)) { int i; for(i=0; du->dk_badsect[i] != -1 && du->dk_badsect[i] <= blknum; i++) { if( du->dk_badsect[i] == blknum) { /* * XXX the offset of the bad sector table ought * to be stored in the in-core copy of the table. */ #define BAD144_PART 2 /* XXX scattered magic numbers */ #define BSD_PART 0 /* XXX should be 2 but bad144.c uses 0 */ if (lp->d_partitions[BSD_PART].p_offset != 0) blknum = lp->d_partitions[BAD144_PART].p_offset + lp->d_partitions[BAD144_PART].p_size; else blknum = lp->d_secperunit; blknum -= lp->d_nsectors + i + 1; break; } } } cylin = blknum / secpercyl; head = (blknum % secpercyl) / secpertrk; sector = blknum % secpertrk; wdtab[ctrlr].b_active = 1; /* mark controller active */ /* if starting a multisector transfer, or doing single transfers */ if (du->dk_skip == 0 || (du->dk_flags & DKFL_SINGLE)) { u_int command; u_int count; if (wdtab[ctrlr].b_errcnt && (bp->b_flags & B_READ) == 0) du->dk_bc += DEV_BSIZE; #ifdef B_FORMAT if (bp->b_flags & B_FORMAT) { command = WDCC_FORMAT; count = lp->d_nsectors; sector = lp->d_gap3 - 1; /* + 1 later */ } else #endif { if (du->dk_flags & DKFL_SINGLE) count = 1; else count = howmany(du->dk_bc, DEV_BSIZE); command = (bp->b_flags & B_READ) ? WDCC_READ : WDCC_WRITE; } /* * XXX this loop may never terminate. The code to handle * counting down of retries and eventually failing the i/o * is in wdintr() and we can't get there from here. */ if (wdtest != 0) { if (--wdtest == 0) { wdtest = 100; printf("dummy wdunwedge\n"); wdunwedge(du); } } while (wdcommand(du, cylin, head, sector, count, command) != 0) { wderror(bp, du, "wdstart: timeout waiting to give command"); wdunwedge(du); } #ifdef WDDEBUG printf("cylin %ld head %ld sector %ld addr %x sts %x\n", cylin, head, sector, (int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE, inb(du->dk_port + wd_altsts)); #endif } /* * Schedule wdtimeout() to wake up after a few seconds. Retrying * unmarked bad blocks can take 3 seconds! Then it is not good that * we retry 5 times. * * XXX wdtimeout() doesn't increment the error count so we may loop * forever. More seriously, the loop isn't forever but causes a * crash. * * TODO fix b_resid bug elsewhere (fd.c....). Fix short but positive * counts being discarded after there is an error (in physio I * think). Discarding them would be OK if the (special) file offset * was not advanced. */ du->dk_timeout = 1 + 3; /* If this is a read operation, just go away until it's done. */ if (bp->b_flags & B_READ) return; /* Ready to send data? */ if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) < 0) { wderror(bp, du, "wdstart: timeout waiting for DRQ"); /* * XXX what do we do now? If we've just issued the command, * then we can treat this failure the same as a command * failure. But if we are continuing a multi-sector write, * the command was issued ages ago, so we can't simply * restart it. * * XXX we waste a lot of time unnecessarily translating block * numbers to cylin/head/sector for continued i/o's. */ } /* then send it! */ outsw(du->dk_port + wd_data, (void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE), DEV_BSIZE / sizeof(short)); du->dk_bc -= DEV_BSIZE; } /* 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(int unit) { register struct disk *du; register struct buf *bp, *dp; if (wdtab[unit].b_active == 2) return; /* intr in wdflushirq() */ if (!wdtab[unit].b_active) { #ifndef LAPTOP printf("wdc%d: extra interrupt\n", unit); #endif return; } bp = wdtab[unit].b_actf; du = wddrives[wdunit(bp->b_dev)]; dp = &wdutab[du->dk_lunit]; du->dk_timeout = 0; if (wdwait(du, 0, TIMEOUT) < 0) { wderror(bp, du, "wdintr: timeout waiting for status"); du->dk_status |= WDCS_ERR; /* XXX */ } /* is it not a transfer, but a control operation? */ if (du->dk_state < OPEN) { wdtab[unit].b_active = 0; switch (wdcontrol(bp)) { case 0: return; case 1: wdstart(unit); return; case 2: goto done; } } /* have we an error? */ if (du->dk_status & (WDCS_ERR | WDCS_ECCCOR)) { oops: #ifdef WDDEBUG wderror(bp, du, "wdintr"); #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_error = EIO; bp->b_flags |= B_ERROR; goto done; } #endif /* error or error correction? */ if (du->dk_status & WDCS_ERR) { if (++wdtab[unit].b_errcnt < RETRIES) { wdtab[unit].b_active = 0; } else { wderror(bp, du, "hard error"); bp->b_error = EIO; bp->b_flags |= B_ERROR; /* flag the error */ } } else wderror(bp, du, "soft ecc"); } /* * If this was a successful read operation, fetch the data. */ if (((bp->b_flags & (B_READ | B_ERROR)) == B_READ) && wdtab[unit].b_active) { int chk, dummy; chk = min(DEV_BSIZE / sizeof(short), du->dk_bc / sizeof(short)); /* ready to receive data? */ if ((du->dk_status & (WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ)) != (WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ)) wderror(bp, du, "wdintr: read intr arrived early"); if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) != 0) { wderror(bp, du, "wdintr: read error detected late"); goto oops; } /* suck in data */ insw(du->dk_port + wd_data, (void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE), chk); du->dk_bc -= chk * sizeof(short); /* XXX for obsolete fractional sector reads. */ while (chk++ < DEV_BSIZE / sizeof(short)) insw(du->dk_port + wd_data, &dummy, 1); } wdxfer[du->dk_lunit]++; outt: if (wdtab[unit].b_active) { if ((bp->b_flags & B_ERROR) == 0) { du->dk_skip++; /* add to successful sectors */ if (wdtab[unit].b_errcnt) wderror(bp, du, "soft error"); wdtab[unit].b_errcnt = 0; /* see if more to transfer */ if (du->dk_bc > 0 && (du->dk_flags & DKFL_ERROR) == 0) { wdtab[unit].b_active = 0; wdstart(unit); return; /* next chunk is started */ } else if ((du->dk_flags & (DKFL_SINGLE | DKFL_ERROR)) == DKFL_ERROR) { du->dk_skip = 0; du->dk_flags &= ~DKFL_ERROR; du->dk_flags |= DKFL_SINGLE; wdtab[unit].b_active = 0; wdstart(unit); return; /* redo xfer sector by sector */ } } done: ; /* done with this transfer, with or without error */ du->dk_flags &= ~DKFL_SINGLE; wdtab[unit].b_actf = bp->b_actf; wdtab[unit].b_errcnt = 0; bp->b_resid = bp->b_bcount - du->dk_skip * DEV_BSIZE; dp->b_active = 0; dp->b_errcnt = 0; du->dk_skip = 0; biodone(bp); } /* controller idle */ wdtab[unit].b_active = 0; /* anything more on drive queue? */ wdustart(du); /* anything more for controller to do? */ if (wdtab[unit].b_actf) wdstart(unit); } /* * 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; char *msg; struct disklabel save_label; lunit = wdunit(dev); if (lunit >= NWD) return (ENXIO); du = wddrives[lunit]; if (du == NULL) return (ENXIO); /* Finish flushing IRQs left over from wdattach(). */ if (wdtab[du->dk_ctrlr].b_active == 2) wdtab[du->dk_ctrlr].b_active = 0; /* * That's all for valid DOS partitions. We don't need a BSD label. * The openmask is only used for checking BSD partitions so we don't * need to maintain it. */ if (wddospart(dev)) { /* XXX we do need a disklabel for now. */ if ((du->dk_flags & DKFL_BSDLABEL) == 0) return (ENXIO); return (part > NDOSPART ? ENXIO : 0); } while (du->dk_flags & DKFL_LABELLING) tsleep((caddr_t)&du->dk_flags, PZERO - 1, "wdopen", 1); if ((du->dk_flags & DKFL_BSDLABEL) == 0) { /* * wdtab[ctrlr].b_active != 0 implies * wdutab[lunit].b_actf == NULL (?) * so the following guards most things (until the next i/o). * It doesn't guard against a new i/o starting and being * affected by the label being changed. Sigh. */ wdsleep(du->dk_ctrlr, "wdopn1"); du->dk_flags |= DKFL_LABELLING | DKFL_WRITEPROT; du->dk_state = WANTOPEN; wdutab[lunit].b_actf = NULL; /* * Read label using WDRAW partition. * * If the drive has an MBR, then the current geometry (from * wdgetctlr()) is used to read it; then the BIOS/DOS * geometry is inferred and used to read the label off the * 'c' partition. Otherwise the label is read using the * current geometry. The label gives the final geometry. * If bad sector handling is enabled, then this geometry * is used to read the bad sector table. The geometry * changes occur inside readdisklabel() and are propagated * to the driver by resetting the state machine. */ save_label = du->dk_dd; du->dk_dd.d_partitions[WDRAW].p_offset = 0; du->dk_dd.d_partitions[WDRAW].p_size = 0x7fffffff;/* XXX */ #define WDSTRATEGY ((int (*)(struct buf *)) wdstrategy) /* XXX */ msg = readdisklabel(makewddev(major(dev), lunit, WDRAW), WDSTRATEGY, &du->dk_dd, du->dk_dospartitions, &du->dk_bad); /* msg = readdisklabel(makewddev(major(dev), lunit, WDRAW), WDSTRATEGY, &du->dk_dd); */ du->dk_flags &= ~DKFL_LABELLING; if (msg != NULL) { du->dk_dd = save_label; log(LOG_WARNING, "wd%d: cannot find label (%s)\n", lunit, msg); if (part != WDRAW) return (EINVAL); /* XXX needs translation */ } else { int dospart; unsigned long newsize, offset, size; du->dk_flags |= DKFL_BSDLABEL; du->dk_flags &= ~DKFL_WRITEPROT; if (du->dk_dd.d_flags & D_BADSECT) { du->dk_flags |= DKFL_BADSECT; bad144intern(du); } /* * Force WDRAW partition to be the whole disk. */ offset = du->dk_dd.d_partitions[WDRAW].p_offset; if (offset != 0) { printf( "wd%d: changing offset of '%c' partition from %lu to 0\n", du->dk_lunit, 'a' + WDRAW, offset); du->dk_dd.d_partitions[WDRAW].p_offset = 0; } size = du->dk_dd.d_partitions[WDRAW].p_size; newsize = du->dk_dd.d_secperunit; /* XXX */ if (size != newsize) { printf( "wd%d: changing size of '%c' partition from %lu to %lu\n", du->dk_lunit, 'a' + WDRAW, size, newsize); du->dk_dd.d_partitions[WDRAW].p_size = newsize; } /* * Convert DOS partition data to a label. */ du->dk_dd2 = du->dk_dd; bzero(du->dk_dd2.d_partitions, sizeof du->dk_dd2.d_partitions); du->dk_dd2.d_partitions[0].p_size = du->dk_dd.d_secperunit; /* XXX */ for (dospart = 1; dospart <= NDOSPART; dospart++) { du->dk_dd2.d_partitions[dospart].p_offset = du->dk_dospartitions[dospart - 1].dp_start; du->dk_dd2.d_partitions[dospart].p_size = du->dk_dospartitions[dospart - 1].dp_size; } } /* Pick up changes made by readdisklabel(). */ wdsleep(du->dk_ctrlr, "wdopn2"); du->dk_state = WANTOPEN; } /* * 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 != 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 == 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); switch (fmt) { case S_IFCHR: du->dk_copenpart |= mask; break; case S_IFBLK: du->dk_bopenpart |= mask; break; } du->dk_openpart = du->dk_copenpart | du->dk_bopenpart; 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, 2 if error. */ static int wdcontrol(register struct buf *bp) { register struct disk *du; int ctrlr; du = wddrives[wdunit(bp->b_dev)]; ctrlr = du->dk_ctrlr; switch (du->dk_state) { case WANTOPEN: tryagainrecal: wdtab[ctrlr].b_active = 1; if (wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) != 0) { wderror(bp, du, "wdcontrol: wdcommand failed"); goto maybe_retry; } du->dk_state = RECAL; return (0); case RECAL: if (du->dk_status & WDCS_ERR || wdsetctlr(du) != 0) { wderror(bp, du, "wdcontrol: recal failed"); maybe_retry: if (du->dk_status & WDCS_ERR) wdunwedge(du); du->dk_state = WANTOPEN; if (++wdtab[ctrlr].b_errcnt < RETRIES) goto tryagainrecal; bp->b_error = ENXIO; /* XXX needs translation */ bp->b_flags |= B_ERROR; return (2); } wdtab[ctrlr].b_errcnt = 0; du->dk_state = OPEN; /* * The rest of the initialization can be done by normal * means. */ return (1); } panic("wdcontrol"); return (2); } /* * Wait uninterruptibly until controller is not busy, then send it a command. * The wait usually terminates immediately because we waited for the previous * command to terminate. */ static int wdcommand(struct disk *du, u_int cylinder, u_int head, u_int sector, u_int count, u_int command) { u_int wdc; if (wdwait(du, 0, TIMEOUT) < 0) return (1); wdc = du->dk_port; outb(wdc + wd_precomp, du->dk_dd.d_precompcyl / 4); outb(wdc + wd_cyl_lo, cylinder); outb(wdc + wd_cyl_hi, cylinder >> 8); outb(wdc + wd_sdh, WDSD_IBM | (du->dk_unit << 4) | head); outb(wdc + wd_sector, sector + 1); outb(wdc + wd_seccnt, count); if (wdwait(du, command == WDCC_DIAGNOSE || command == WDCC_IDC ? 0 : WDCS_READY, TIMEOUT) < 0) return (1); outb(wdc + wd_command, command); return (0); } /* * issue IDC to drive to tell it just what geometry it is to be. */ static int wdsetctlr(struct disk *du) { int error = 0; #ifdef WDDEBUG printf("wd(%d,%d): wdsetctlr: C %lu H %lu S %lu\n", du->dk_ctrlr, du->dk_unit, du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks, du->dk_dd.d_nsectors); #endif if (du->dk_dd.d_ntracks == 0 || du->dk_dd.d_ntracks > 16) { struct wdparams *wp; printf("wd%d: can't handle %lu heads from partition table ", du->dk_lunit, du->dk_dd.d_ntracks); /* obtain parameters */ wp = &du->dk_params; if (wp->wdp_heads > 0 && wp->wdp_heads <= 16) { printf("(controller value %lu restored)\n", wp->wdp_heads); du->dk_dd.d_ntracks = wp->wdp_heads; } else { printf("(truncating to 16)\n"); du->dk_dd.d_ntracks = 16; } } if (du->dk_dd.d_nsectors == 0 || du->dk_dd.d_nsectors > 255) { printf("wd%d: cannot handle %lu sectors (max 255)\n", du->dk_lunit, du->dk_dd.d_nsectors); error = 1; } if (error) { wdtab[du->dk_ctrlr].b_errcnt += RETRIES; return (1); } if (wdcommand(du, du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks - 1, 0, du->dk_dd.d_nsectors, WDCC_IDC) != 0 || wdwait(du, WDCS_READY, TIMEOUT) < 0) { wderror((struct buf *)NULL, du, "wdsetctlr failed"); return (1); } return (0); } /* * Wait until driver is inactive, then set up controller. */ static int wdwsetctlr(struct disk *du) { int stat; int x; wdsleep(du->dk_ctrlr, "wdwset"); x = splbio(); stat = wdsetctlr(du); wdflushirq(du, x); splx(x); return (stat); } /* * issue READP to drive to ask it what it is. */ static int wdgetctlr(struct disk *du) { int i; char tb[DEV_BSIZE]; struct wdparams *wp; if (wdcommand(du, 0, 0, 0, 0, WDCC_READP) != 0 || wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) != 0) { /* XXX need to check error status after final transfer. */ /* * Old drives don't support WDCC_READP. Try a seek to 0. * Some IDE controllers return trash if there is no drive * attached, so first test that the drive can be selected. * This also avoids long waits for nonexistent drives. */ if (wdwait(du, 0, TIMEOUT) < 0) return (1); outb(du->dk_port + wd_sdh, WDSD_IBM | (du->dk_unit << 4)); DELAY(5000); /* usually unnecessary; drive select is fast */ if ((inb(du->dk_port + wd_status) & (WDCS_BUSY | WDCS_READY)) != WDCS_READY || wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) != 0 || wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) != 0) return (1); /* * Fake minimal drive geometry for reading the MBR. * readdisklabel() may enlarge it to read the label and the * bad sector table. */ du->dk_dd.d_secsize = DEV_BSIZE; du->dk_dd.d_nsectors = 17; du->dk_dd.d_ntracks = 1; du->dk_dd.d_ncylinders = 1; du->dk_dd.d_secpercyl = 17; du->dk_dd.d_secperunit = 17; /* * Fake maximal drive size for writing the label. */ du->dk_dd.d_partitions[WDRAW].p_size = 64 * 16 * 1024; /* * Fake some more of the label for printing by disklabel(1) * in case there is no real label. */ du->dk_dd.d_type = DTYPE_ST506; du->dk_dd.d_subtype |= DSTYPE_GEOMETRY; strncpy(du->dk_dd.d_typename, "Fake geometry", sizeof du->dk_dd.d_typename); /* Fake the model name for printing by wdattach(). */ strncpy(du->dk_params.wdp_model, "unknown", sizeof du->dk_params.wdp_model); return (0); } /* obtain parameters */ wp = &du->dk_params; insw(du->dk_port + 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); } /* * Clean up the wdp_model by converting nulls to spaces, and * then removing the trailing spaces. */ for (i=0; i < sizeof(wp->wdp_model); i++) { if (wp->wdp_model[i] == '\0') { wp->wdp_model[i] = ' '; } } for (i=sizeof(wp->wdp_model)-1; i>=0 && wp->wdp_model[i]==' '; i--) { wp->wdp_model[i] = '\0'; } #ifdef WDDEBUG printf( "\nwd(%d,%d): wdgetctlr: gc %x cyl %d trk %d sec %d type %d sz %d model %s\n", du->dk_ctrlr, du->dk_unit, 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 /* update disklabel given drive information */ du->dk_dd.d_secsize = DEV_BSIZE; 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[WDRAW].p_size = du->dk_dd.d_secperunit = du->dk_dd.d_secpercyl * du->dk_dd.d_ncylinders; /* dubious ... */ bcopy("ESDI/IDE", du->dk_dd.d_typename, 9); bcopy(wp->wdp_model + 20, du->dk_dd.d_packname, 14 - 1); /* better ... */ du->dk_dd.d_type = DTYPE_ESDI; du->dk_dd.d_subtype |= DSTYPE_GEOMETRY; return (0); } /* ARGSUSED */ int wdclose(dev_t dev, int flags, int fmt) { register struct disk *du; int part = wdpart(dev), mask = 1 << part; if (wddospart(dev)) return (0); du = wddrives[wdunit(dev)]; switch (fmt) { case S_IFCHR: du->dk_copenpart &= ~mask; break; case S_IFBLK: du->dk_bopenpart &= ~mask; break; } du->dk_openpart = du->dk_copenpart | du->dk_bopenpart; 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; #ifdef notyet struct uio auio; struct iovec aiov; #endif du = wddrives[lunit]; switch (cmd) { case DIOCSBAD: if ((flag & FWRITE) == 0) error = EBADF; else { du->dk_bad = *(struct dkbad *)addr; bad144intern(du); } break; case DIOCGDINFO: *(struct disklabel *)addr = du->dk_dd; break; case DIOCGPART: if (wddospart(dev)) return (EINVAL); ((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, #if 0 /* * XXX setdisklabel() uses the * openmask to allow it to reject * changing open partitions. Why * are we pretending nothing is * open? */ du->dk_flags & DKFL_BSDLABEL ? du->dk_openpart : #endif 0, du->dk_dospartitions); if (error == 0) { du->dk_flags |= DKFL_BSDLABEL; wdwsetctlr(du); /* XXX - check */ } 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, #if 0 du->dk_flags & DKFL_BSDLABEL ? du->dk_openpart : #endif 0, du->dk_dospartitions)) == 0) { int wlab; du->dk_flags |= DKFL_BSDLABEL; wdwsetctlr(du); /* XXX - check */ /* 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_dospartitions); 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 /* XXX the 386BSD interface is different */ error = physio(wdformat, &rwdbuf[lunit], 0, 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), val; struct disk *du; int size; if (lunit >= NWD || wddospart(dev) || (du = wddrives[lunit]) == NULL) { return (-1); } val = 0; if (du->dk_state == CLOSED) { val = wdopen(makewddev(major(dev), lunit, WDRAW), FREAD, S_IFBLK, 0); } if (val != 0 || du->dk_flags & DKFL_WRITEPROT) { return (-1); } size = ((int)du->dk_dd.d_partitions[part].p_size); return size; } extern char *ptvmmap; /* poor name! */ /* * Dump core after a system crash. */ int wddump(dev_t dev) { register struct disk *du; register struct bt_bad *bt_ptr; struct disklabel *lp; long num; /* number of sectors to write */ int lunit, part; long blkoff, blknum; long blkchk, blkcnt, blknext; long cylin, head, sector; long secpertrk, secpercyl, nblocks; char *addr; extern int Maxmem; static int wddoingadump = 0; extern caddr_t CADDR1; /* Toss any characters present prior to dump. */ while (sgetc(1)) ; /* Check for acceptable device. */ /* XXX should reset to maybe allow du->dk_state < OPEN. */ lunit = wdunit(dev); /* eventually support floppies? */ part = wdpart(dev); if (lunit >= NWD || wddospart(dev) || (du = wddrives[lunit]) == NULL || du->dk_state < OPEN || du->dk_flags & DKFL_WRITEPROT) return (ENXIO); /* Size of memory to dump, in disk sectors. */ num = (u_long)Maxmem * NBPG / du->dk_dd.d_secsize; 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; #if 0 pg("part %x, nblocks %d, dumplo %d num %d\n", part, nblocks, dumplo, num); #endif /* Check transfer bounds against partition size. */ if (dumplo < 0 || dumplo + num > nblocks) return (EINVAL); /* Check if we are being called recursively. */ if (wddoingadump) return (EFAULT); #if 0 /* Mark controller active for if we panic during the dump. */ wdtab[du->dk_ctrlr].b_active = 1; #endif wddoingadump = 1; /* Recalibrate the drive. */ DELAY(5); /* ATA spec XXX NOT */ if (wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) != 0 || wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) != 0 || wdsetctlr(du) != 0) { wderror((struct buf *)NULL, du, "wddump: recalibrate failed"); return (EIO); } du->dk_flags |= DKFL_SINGLE; addr = (char *) 0; blknum = dumplo + blkoff; while (num > 0) { blkcnt = num; if (blkcnt > MAXTRANSFER) blkcnt = MAXTRANSFER; /* Keep transfer within current cylinder. */ if ((blknum + blkcnt - 1) / secpercyl != blknum / secpercyl) blkcnt = secpercyl - (blknum % secpercyl); blknext = blknum + blkcnt; /* * See if one of the sectors is in the bad sector list * (if we have one). If the first sector is bad, then * reduce the transfer to this one bad sector; if another * sector is bad, then reduce reduce the transfer to * avoid any bad sectors. */ if ((du->dk_flags & (DKFL_SINGLE | DKFL_BADSECT)) == (DKFL_SINGLE | DKFL_BADSECT)) for (blkchk = blknum; blkchk < blknum + blkcnt; blkchk++) { cylin = blkchk / secpercyl; head = (blkchk % secpercyl) / secpertrk; sector = blkchk % secpertrk; for (bt_ptr = du->dk_bad.bt_bad; bt_ptr->bt_cyl != BAD144_NO_CYL; bt_ptr++) { if (bt_ptr->bt_cyl > cylin) /* * Sorted list, and we passed our cylinder. * quit. */ break; if (bt_ptr->bt_cyl == cylin && bt_ptr->bt_trksec == (head << 8) + sector) { /* Found bad block. */ blkcnt = blkchk - blknum; if (blkcnt > 0) { blknext = blknum + blkcnt; goto out; } blkcnt = 1; blknext = blknum + blkcnt; /* * Found bad block. Calculate new block number. * This starts at the end of the disk (skip the * last track which is used for the bad block list), * and works backwards to the front of the disk. */ /* XXX as usual. */ #ifdef WDDEBUG printf("--- badblock code -> Old = %ld; ", blknum); #endif lp = &du->dk_dd; if (lp->d_partitions[BSD_PART].p_offset != 0) blknum = lp->d_partitions[BAD144_PART] .p_offset + lp->d_partitions[BAD144_PART] .p_size; else blknum = lp->d_secperunit; blknum -= lp->d_nsectors + (bt_ptr - du->dk_bad.bt_bad) + 1; #ifdef WDDEBUG printf("new = %ld\n", blknum); #endif break; } } } out: /* Compute disk address. */ cylin = blknum / secpercyl; head = (blknum % secpercyl) / secpertrk; sector = blknum % secpertrk; #if 0 /* Let's just talk about this first... */ pg("cylin l%d head %ld sector %ld addr 0x%x count %ld", cylin, head, sector, addr, blkcnt); #endif /* Do the write. */ if (wdcommand(du, cylin, head, sector, blkcnt, WDCC_WRITE) != 0) { wderror((struct buf *)NULL, du, "wddump: timeout waiting to to give command"); return (EIO); } while (blkcnt != 0) { pmap_enter(kernel_pmap, (vm_offset_t)CADDR1, trunc_page(addr), VM_PROT_READ, TRUE); /* Ready to send data? */ DELAY(5); /* ATA spec */ if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) < 0) { wderror((struct buf *)NULL, du, "wddump: timeout waiting for DRQ"); return (EIO); } outsw(du->dk_port + wd_data, CADDR1 + ((int)addr & (NBPG - 1)), DEV_BSIZE / sizeof(short)); addr += DEV_BSIZE; if ((unsigned)addr % (1024 * 1024) == 0) printf("%ld ", num / (1024 * 1024 / DEV_BSIZE)); num--; blkcnt--; } /* Wait for completion. */ DELAY(5); /* ATA spec XXX NOT */ if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) < 0) { wderror((struct buf *)NULL, du, "wddump: timeout waiting for status"); return (EIO); } /* Check final status. */ if (du->dk_status & (WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ | WDCS_ERR) != (WDCS_READY | WDCS_SEEKCMPLT)) { wderror((struct buf *)NULL, du, "wddump: extra DRQ, or error"); return (EIO); } /* Update block count. */ blknum = blknext; /* Operator aborting dump? */ if (sgetc(1) & 0xff) /* EWS: A hack to work with syscons */ return (EINTR); } return (0); } static void wderror(struct buf *bp, struct disk *du, char *mesg) { if (bp == NULL) printf("wd%d: %s:\n", du->dk_lunit, mesg); else diskerr(bp, "wd", mesg, LOG_PRINTF, du->dk_skip, &du->dk_dd); printf("wd%d: status %b error %b\n", du->dk_lunit, du->dk_status, WDCS_BITS, du->dk_error, WDERR_BITS); } /* * Discard any interrupts that were latched by the interrupt system while * we were doing polled i/o. */ static void wdflushirq(struct disk *du, int old_ipl) { wdtab[du->dk_ctrlr].b_active = 2; splx(old_ipl); (void)splbio(); wdtab[du->dk_ctrlr].b_active = 0; } /* * Reset the controller. */ static int wdreset(struct disk *du) { int wdc; wdc = du->dk_port; (void)wdwait(du, 0, TIMEOUT); outb(wdc + wd_ctlr, WDCTL_IDS | WDCTL_RST); DELAY(10 * 1000); outb(wdc + wd_ctlr, WDCTL_IDS); if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) != 0 || (du->dk_error = inb(wdc + wd_error)) != 0x01) return (1); outb(wdc + wd_ctlr, WDCTL_4BIT); return (0); } /* * Sleep until driver is inactive. * This is used only for avoiding rare race conditions, so it is unimportant * that the sleep may be far too short or too long. */ static void wdsleep(int ctrlr, char *wmesg) { while (wdtab[ctrlr].b_active) tsleep((caddr_t)&wdtab[ctrlr].b_active, PZERO - 1, wmesg, 1); } static void wdtimeout(void *cdu) { struct disk *du; int x; du = (struct disk *)cdu; x = splbio(); if (du->dk_timeout != 0 && --du->dk_timeout == 0) { wderror((struct buf *)NULL, du, "interrupt timeout"); wdunwedge(du); wdflushirq(du, x); du->dk_skip = 0; du->dk_flags |= DKFL_SINGLE; wdstart(du->dk_ctrlr); } timeout(wdtimeout, cdu, hz); splx(x); } /* * Reset the controller after it has become wedged. This is different from * wdreset() so that wdreset() can be used in the probe and so that this * can restore the geometry . */ static int wdunwedge(struct disk *du) { struct disk *du1; int lunit; /* Schedule other drives for recalibration. */ for (lunit = 0; lunit < NWD; lunit++) if ((du1 = wddrives[lunit]) != NULL && du1 != du && du1->dk_ctrlr == du->dk_ctrlr && du1->dk_state > WANTOPEN) du1->dk_state = WANTOPEN; DELAY(RECOVERYTIME); if (wdreset(du) == 0) { /* * XXX - recalibrate current drive now because some callers * aren't prepared to have its state change. */ if (wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) == 0 && wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) == 0 && wdsetctlr(du) == 0) return (0); } wderror((struct buf *)NULL, du, "wdunwedge failed"); return (1); } /* * Wait uninterruptibly until controller is not busy and either certain * status bits are set or an error has occurred. * The wait is usually short unless it is for the controller to process * an entire critical command. * Return 1 for (possibly stale) controller errors, -1 for timeout errors, * or 0 for no errors. * Return controller status in du->dk_status and, if there was a controller * error, return the error code in du->dk_error. */ #ifdef WD_COUNT_RETRIES static int min_retries[NWDC]; #endif static int wdwait(struct disk *du, u_char bits_wanted, int timeout) { int wdc; u_char status; #define POLLING 1000 wdc = du->dk_port; timeout += POLLING; do { #ifdef WD_COUNT_RETRIES if (min_retries[du->dk_ctrlr] > timeout || min_retries[du->dk_ctrlr] == 0) min_retries[du->dk_ctrlr] = timeout; #endif DELAY(5); /* ATA spec XXX NOT */ du->dk_status = status = inb(wdc + wd_status); if (!(status & WDCS_BUSY)) { if (status & WDCS_ERR) { du->dk_error = inb(wdc + wd_error); /* * We once returned here. This is wrong * because the error bit is apparently only * valid after the controller has interrupted * (e.g., the error bit is stale when we wait * for DRQ for writes). So we can't depend * on the error bit at all when polling for * command completion. */ } if ((status & bits_wanted) == bits_wanted) return (status & WDCS_ERR); } if (timeout < TIMEOUT) /* * Switch to a polling rate of about 1 KHz so that * the timeout is almost machine-independent. The * controller is taking a long time to respond, so * an extra msec won't matter. */ DELAY(1000); } while (--timeout != 0); return (-1); } /* * 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_bad.bt_bad[i].bt_cyl == 0xffff) { break; } else { du->dk_badsect[i] = du->dk_bad.bt_bad[i].bt_cyl * du->dk_dd.d_secpercyl + (du->dk_bad.bt_bad[i].bt_trksec >> 8) * du->dk_dd.d_nsectors + (du->dk_bad.bt_bad[i].bt_trksec & 0x00ff); } } } } #endif /* NWDC > 0 */