/*- * 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 1.75 1995/04/24 04:32:31 dyson 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 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 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 #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 WDOPT_32BIT 0x8000 #define WDOPT_SLEEPHACK 0x4000 #define WDOPT_MULTIMASK 0x00ff static int wd_goaway(struct kern_devconf *, int); static int wdc_goaway(struct kern_devconf *, int); static int wd_externalize(struct proc *, struct kern_devconf *, void *, size_t); static int wdc_externalize(struct proc *, struct kern_devconf *, void *, size_t); /* * Templates for the kern_devconf structures used when we attach. */ static struct kern_devconf kdc_wd[NWD] = { { 0, 0, 0, /* filled in by kern_devconf.c */ "wd", 0, { MDDT_DISK, 0 }, wd_externalize, 0, wd_goaway, DISK_EXTERNALLEN, 0, /* parent */ 0, /* parentdata */ DC_UNKNOWN, /* state */ "ST506/ESDI/IDE disk", /* description */ DC_CLS_DISK /* class */ } }; static struct kern_devconf kdc_wdc[NWDC] = { { 0, 0, 0, /* filled in by kern_devconf.c */ "wdc", 0, { MDDT_ISA, 0 }, isa_generic_externalize, 0, wdc_goaway, ISA_EXTERNALLEN, &kdc_isa0, /* parent */ 0, /* parentdata */ DC_UNCONFIGURED, /* state */ "ST506/ESDI/IDE disk controller", DC_CLS_MISC /* just an ordinary device */ } }; static inline void wd_registerdev(int ctlr, int unit) { if(unit != 0) kdc_wd[unit] = kdc_wd[0]; kdc_wd[unit].kdc_unit = unit; kdc_wd[unit].kdc_parent = &kdc_wdc[ctlr]; dev_attach(&kdc_wd[unit]); } static inline void wdc_registerdev(struct isa_device *dvp) { int unit = dvp->id_unit; if(unit != 0) kdc_wdc[unit] = kdc_wdc[0]; kdc_wdc[unit].kdc_unit = unit; kdc_wdc[unit].kdc_parentdata = dvp; dev_attach(&kdc_wdc[unit]); } static int wdc_goaway(struct kern_devconf *kdc, int force) { if(force) { dev_detach(kdc); return 0; } else { return EBUSY; /* XXX fix */ } } static int wd_goaway(struct kern_devconf *kdc, int force) { dev_detach(kdc); return 0; } /* * 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 */ /* * Disk geometry. A small part of struct disklabel. * XXX disklabel.5 contains an old clone of disklabel.h. */ struct diskgeom { u_long d_secsize; /* # of bytes per sector */ u_long d_nsectors; /* # of data sectors per track */ u_long d_ntracks; /* # of tracks per cylinder */ u_long d_ncylinders; /* # of data cylinders per unit */ u_long d_secpercyl; /* # of data sectors per cylinder */ u_long d_secperunit; /* # of data sectors per unit */ u_long d_precompcyl; /* XXX always 0 */ }; /* * 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 */ short dk_flags; /* drive characteristics found */ u_long cfg_flags; /* configured characteristics */ #define DKFL_SINGLE 0x00004 /* sector at a time mode */ #define DKFL_ERROR 0x00008 /* processing a disk error */ #define DKFL_LABELLING 0x00080 /* readdisklabel() in progress */ #define DKFL_32BIT 0x00100 /* use 32-bit i/o mode */ #define DKFL_MULTI 0x00200 /* use multi-i/o mode */ struct wdparams dk_params; /* ESDI/IDE drive/controller parameters */ int dk_dkunit; /* disk stats unit number */ int dk_multi; /* multi transfers */ int dk_currentiosize; /* current io size */ struct diskgeom dk_dd; /* device configuration data */ struct diskslices *dk_slices; /* virtual drives */ }; #define WD_COUNT_RETRIES static int wdtest = 0; 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 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 void wdstrategy1(struct buf *bp); static timeout_t wdtimeout; static int wdunwedge(struct disk *du); static int wdwait(struct disk *du, u_char bits_wanted, int timeout); /* * Provide hw.devconf information. */ static int wd_externalize(struct proc *p, struct kern_devconf *kdc, void *userp, size_t len) { return disk_externalize(wddrives[kdc->kdc_unit]->dk_unit, userp, &len); } struct isa_driver wdcdriver = { wdprobe, wdattach, "wdc", }; /* * 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; wdc_registerdev(dvp); /* 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) == 0xff) /* XXX too weak */ 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); kdc_wdc[dvp->id_unit].kdc_state = DC_UNKNOWN; /* XXX */ 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; /* * Use the individual device flags or the controller * flags. */ du->cfg_flags = wdup->id_flags | ((dvp->id_flags) >> (16 * unit)); if (wdgetctlr(du) == 0) { char buf[sizeof du->dk_params.wdp_model + 1]; /* * Print out description of drive. * wdp_model may not be null terminated, and printf * doesn't support "%.*s" :-(, so copy wdp_model * and add a null before printing. */ bcopy(du->dk_params.wdp_model, buf, sizeof buf - 1); buf[sizeof buf - 1] = '\0'; printf("wdc%d: unit %d (wd%d): <%s>", dvp->id_unit, unit, lunit, buf); if (du->dk_flags & DKFL_32BIT) printf(", 32-bit"); if (du->dk_multi > 1) printf(", multi-block-%d", du->dk_multi); if (du->cfg_flags & WDOPT_SLEEPHACK) printf(", sleep-hack"); printf("\n"); if (du->dk_params.wdp_heads == 0) printf("wd%d: size unknown, using %s values\n", lunit, du->dk_dd.d_secperunit > 17 ? "BIOS" : "fake"); printf( "wd%d: %luMB (%lu sectors), %lu cyls, %lu heads, %lu S/T, %lu B/S\n", lunit, du->dk_dd.d_secperunit * du->dk_dd.d_secsize / (1024 * 1024), du->dk_dd.d_secperunit, 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(du); wd_registerdev(dvp->id_unit, lunit); if (dk_ndrive < DK_NDRIVE) { sprintf(dk_names[dk_ndrive], "wd%d", lunit); /* * XXX we don't know the transfer rate of the * drive. Guess the maximum ISA rate of * 4MB/sec. `wpms' is words per _second_ * according to iostat. */ dk_wpms[dk_ndrive] = 4 * 1024 * 1024 / 2; du->dk_dkunit = dk_ndrive++; } else { du->dk_dkunit = -1; } } 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 = dkunit(bp->b_dev); int s; /* valid unit, controller, and request? */ if (lunit >= NWD || bp->b_blkno < 0 || (du = wddrives[lunit]) == NULL || bp->b_bcount % DEV_BSIZE != 0) { bp->b_error = EINVAL; bp->b_flags |= B_ERROR; goto done; } /* * Do bounds checking, adjust transfer, set b_cylin and b_pbklno. */ if (dscheck(bp, du->dk_slices) <= 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 undesirable. * * XXX the old disksort() doesn't look at B_BAD. Coalescing _is_ * desirable. We should split the results at bad blocks just * like we should split them at MAXTRANSFER boundaries. */ if (dsgetbad(bp->b_dev, du->dk_slices) != NULL) { long *badsect = dsgetbad(bp->b_dev, du->dk_slices)->bi_bad; int i; int nsecs = howmany(bp->b_bcount, DEV_BSIZE); /* XXX pblkno is too physical. */ daddr_t nspblkno = bp->b_pblkno - du->dk_slices->dss_slices[dkslice(bp->b_dev)].ds_offset; int blkend = nspblkno + nsecs; for (i = 0; badsect[i] != -1 && badsect[i] < blkend; i++) { if (badsect[i] >= nspblkno) { bp->b_flags |= B_BAD; break; } } } /* queue transfer on drive, activate drive and controller if idle */ dp = &wdutab[lunit]; s = splbio(); 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 */ if (du->dk_dkunit >= 0) { /* * XXX perhaps we should only count successful transfers. */ dk_xfer[du->dk_dkunit]++; /* * XXX we can't count seeks correctly but we can do better * than this. E.g., assume that the geometry is correct * and count 1 seek if the starting cylinder of this i/o * differs from the starting cylinder of the previous i/o, * or count 1 seek if the starting bn of this i/o doesn't * immediately follow the ending bn of the previos i/o. */ dk_seek[du->dk_dkunit]++; } splx(s); return; done: s = splbio(); /* toss transfer, we're done early */ biodone(bp); splx(s); } static void wdstrategy1(struct buf *bp) { /* * XXX - do something to make wdstrategy() but not this block while * we're doing dsinit() and dsioctl(). */ wdstrategy(bp); } /* * 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 diskgeom *lp; /* XXX sic */ struct buf *dp; long blknum; long secpertrk, secpercyl; int lunit; int count; 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 = dkunit(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 && dsgetbad(bp->b_dev, du->dk_slices) != NULL) { /* XXX */ u_long ds_offset = du->dk_slices->dss_slices[dkslice(bp->b_dev)].ds_offset; blknum = transbad144(dsgetbad(bp->b_dev, du->dk_slices), blknum - ds_offset) + ds_offset; } 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; long cylin, head, sector; cylin = blknum / secpercyl; head = (blknum % secpercyl) / secpertrk; sector = blknum % secpertrk; if (wdtab[ctrlr].b_errcnt && (bp->b_flags & B_READ) == 0) du->dk_bc += DEV_BSIZE; count = howmany( du->dk_bc, DEV_BSIZE); du->dk_flags &= ~DKFL_MULTI; #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) { command = (bp->b_flags & B_READ) ? WDCC_READ : WDCC_WRITE; count = 1; du->dk_currentiosize = 1; } else { if( (count > 1) && (du->dk_multi > 1)) { du->dk_flags |= DKFL_MULTI; if( bp->b_flags & B_READ) { command = WDCC_READ_MULTI; } else { command = WDCC_WRITE_MULTI; } du->dk_currentiosize = du->dk_multi; if( du->dk_currentiosize > count) du->dk_currentiosize = count; } else { if( bp->b_flags & B_READ) { command = WDCC_READ; } else { command = WDCC_WRITE; } du->dk_currentiosize = 1; } } } /* * 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); } } if(du->dk_dkunit >= 0) { dk_busy |= 1 << du->dk_dkunit; } 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. */ } count = 1; if( du->dk_flags & DKFL_MULTI) { count = howmany(du->dk_bc, DEV_BSIZE); if( count > du->dk_multi) count = du->dk_multi; if( du->dk_currentiosize > count) du->dk_currentiosize = count; } if (du->dk_flags & DKFL_32BIT) outsl(du->dk_port + wd_data, (void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE), (count * DEV_BSIZE) / sizeof(long)); else outsw(du->dk_port + wd_data, (void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE), (count * DEV_BSIZE) / sizeof(short)); du->dk_bc -= DEV_BSIZE * count; if (du->dk_dkunit >= 0) { /* * `wd's are blocks of 32 16-bit `word's according to * iostat. dk_wds[] is the one disk i/o statistic that * we can record correctly. * XXX perhaps we shouldn't record words for failed * transfers. */ dk_wds[du->dk_dkunit] += (count * DEV_BSIZE) >> 6; } } /* 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) { #ifdef WDDEBUG /* * These happen mostly because the power-mgt part of the * bios shuts us down, and we just manage to see the * interrupt from the "SLEEP" command. */ printf("wdc%d: extra interrupt\n", unit); #endif return; } bp = wdtab[unit].b_actf; du = wddrives[dkunit(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: /* * XXX bogus inb() here, register 0 is assumed and intr status * is reset. */ if( (du->dk_status & DKFL_MULTI) && (inb(du->dk_port) & WDERR_ABORT)) { wderror(bp, du, "reverting to non-multi sector mode"); du->dk_multi = 1; } #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, multisize; multisize = chk = du->dk_currentiosize * DEV_BSIZE; if( du->dk_bc < chk) { chk = du->dk_bc; if( ((chk + DEV_BSIZE - 1) / DEV_BSIZE) < du->dk_currentiosize) { du->dk_currentiosize = (chk + DEV_BSIZE - 1) / DEV_BSIZE; multisize = du->dk_currentiosize * DEV_BSIZE; } } /* 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 */ if( du->dk_flags & DKFL_32BIT) insl(du->dk_port + wd_data, (void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE), chk / sizeof(long)); else insw(du->dk_port + wd_data, (void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE), chk / sizeof(short)); du->dk_bc -= chk; /* XXX for obsolete fractional sector reads. */ while (chk < multisize) { insw(du->dk_port + wd_data, &dummy, 1); chk += sizeof(short); } if (du->dk_dkunit >= 0) dk_wds[du->dk_dkunit] += chk >> 6; } outt: if (wdtab[unit].b_active) { if ((bp->b_flags & B_ERROR) == 0) { du->dk_skip += du->dk_currentiosize;/* 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) { if( (du->dk_flags & DKFL_SINGLE) || ((bp->b_flags & B_READ) == 0)) { wdtab[unit].b_active = 0; wdstart(unit); } else { du->dk_timeout = 1 + 3; } 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); } if(du->dk_dkunit >= 0) { dk_busy &= ~(1 << du->dk_dkunit); } /* 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 error; int part = dkpart(dev), mask = 1 << part; struct partition *pp; char *msg; lunit = dkunit(dev); if (lunit >= NWD || dktype(dev) != 0) 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; while (du->dk_flags & DKFL_LABELLING) tsleep((caddr_t)&du->dk_flags, PZERO - 1, "wdopen", 1); #if 1 wdsleep(du->dk_ctrlr, "wdopn1"); du->dk_flags |= DKFL_LABELLING; du->dk_state = WANTOPEN; wdutab[lunit].b_actf = NULL; { struct disklabel label; bzero(&label, sizeof label); label.d_secsize = du->dk_dd.d_secsize; label.d_nsectors = du->dk_dd.d_nsectors; label.d_ntracks = du->dk_dd.d_ntracks; label.d_ncylinders = du->dk_dd.d_ncylinders; label.d_secpercyl = du->dk_dd.d_secpercyl; label.d_secperunit = du->dk_dd.d_secperunit; error = dsopen("wd", dev, fmt, &du->dk_slices, &label, wdstrategy1, (ds_setgeom_t *)NULL); } du->dk_flags &= ~DKFL_LABELLING; wdsleep(du->dk_ctrlr, "wdopn2"); return (error); #else 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; du->dk_state = WANTOPEN; wdutab[lunit].b_actf = NULL; error = dsinit(dkmodpart(dev, RAW_PART), wdstrategy, &du->dk_dd, &du->dk_slices); if (error != 0) { du->dk_flags &= ~DKFL_LABELLING; return (error); } /* XXX check value returned by wdwsetctlr(). */ wdwsetctlr(du); if (dkslice(dev) == WHOLE_DISK_SLICE) { dsopen(dev, fmt, du->dk_slices); return (0); } /* * Read label using RAW_PART 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. * * XXX can now handle changes directly since dsinit() doesn't * do too much. */ msg = correct_readdisklabel(dkmodpart(dev, RAW_PART), wdstrategy, &du->dk_dd); /* XXX check value returned by wdwsetctlr(). */ wdwsetctlr(du); if (msg == NULL && du->dk_dd.d_flags & D_BADSECT) msg = readbad144(dkmodpart(dev, RAW_PART), wdstrategy, &du->dk_dd, &du->dk_bad); du->dk_flags &= ~DKFL_LABELLING; if (msg != NULL) { log(LOG_WARNING, "wd%d: cannot find label (%s)\n", lunit, msg); if (part != RAW_PART) return (EINVAL); /* XXX needs translation */ /* * Soon return. This is how slices without labels * are allowed. They only work on the raw partition. */ } else { unsigned long newsize, offset, size; #if 0 /* * Force RAW_PART partition to be the whole disk. */ offset = du->dk_dd.d_partitions[RAW_PART].p_offset; if (offset != 0) { printf( "wd%d: changing offset of '%c' partition from %lu to 0\n", du->dk_lunit, 'a' + RAW_PART, offset); du->dk_dd.d_partitions[RAW_PART].p_offset = 0; } size = du->dk_dd.d_partitions[RAW_PART].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' + RAW_PART, size, newsize); du->dk_dd.d_partitions[RAW_PART].p_size = newsize; } #endif } /* 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 != RAW_PART) { 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 == RAW_PART) 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 != RAW_PART) return (ENXIO); dsopen(dev, fmt, du->dk_slices); return (0); #endif } /* * 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[dkunit(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; wdc = du->dk_port; if (du->cfg_flags & WDOPT_SLEEPHACK) if(inb(wdc + wd_status) == WDCS_BUSY) wdunwedge(du); if (wdwait(du, 0, TIMEOUT) < 0) return (1); if( command == WDCC_FEATURES) { outb(wdc + wd_features, count); } else { 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], tb2[DEV_BSIZE]; struct wdparams *wp = NULL; u_long flags = du->cfg_flags; again: if (wdcommand(du, 0, 0, 0, 0, WDCC_READP) != 0 || wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) != 0) { /* * if we failed on the second try, assume non-32bit */ if( du->dk_flags & DKFL_32BIT) goto failed; /* 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); if (du->dk_unit == bootinfo.bi_n_bios_used) { du->dk_dd.d_secsize = DEV_BSIZE; du->dk_dd.d_nsectors = bootinfo.bi_bios_geom[du->dk_unit] & 0xff; du->dk_dd.d_ntracks = ((bootinfo.bi_bios_geom[du->dk_unit] >> 8) & 0xff) + 1; /* XXX Why 2 ? */ du->dk_dd.d_ncylinders = (bootinfo.bi_bios_geom[du->dk_unit] >> 16) + 2; du->dk_dd.d_secpercyl = du->dk_dd.d_ntracks * du->dk_dd.d_nsectors; du->dk_dd.d_secperunit = du->dk_dd.d_secpercyl * du->dk_dd.d_ncylinders; #if 0 du->dk_dd.d_partitions[WDRAW].p_size = du->dk_dd.d_secperunit; du->dk_dd.d_type = DTYPE_ST506; du->dk_dd.d_subtype |= DSTYPE_GEOMETRY; strncpy(du->dk_dd.d_typename, "Bios geometry", sizeof du->dk_dd.d_typename); strncpy(du->dk_params.wdp_model, "ST506", sizeof du->dk_params.wdp_model); #endif bootinfo.bi_n_bios_used ++; return 0; } /* * 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; #if 0 /* * Fake maximal drive size for writing the label. */ du->dk_dd.d_partitions[RAW_PART].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); #endif /* 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; if (du->dk_flags & DKFL_32BIT) insl(du->dk_port + wd_data, tb, sizeof(tb) / sizeof(long)); else insw(du->dk_port + wd_data, tb, sizeof(tb) / sizeof(short)); /* try 32-bit data path (VLB IDE controller) */ if (flags & WDOPT_32BIT) { if (! (du->dk_flags & DKFL_32BIT)) { bcopy(tb, tb2, sizeof(struct wdparams)); du->dk_flags |= DKFL_32BIT; goto again; } /* check that we really have 32-bit controller */ if (bcmp (tb, tb2, sizeof(struct wdparams)) != 0) { failed: /* test failed, use 16-bit i/o mode */ bcopy(tb2, tb, sizeof(struct wdparams)); du->dk_flags &= ~DKFL_32BIT; } } 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_secperunit = du->dk_dd.d_secpercyl * du->dk_dd.d_ncylinders; #if 0 du->dk_dd.d_partitions[RAW_PART].p_size = du->dk_dd.d_secperunit; /* 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; #endif /* * find out the drives maximum multi-block transfer capability */ du->dk_multi = wp->wdp_nsecperint & 0xff; /* * The config option flags low 8 bits define the maximum multi-block * transfer size. If the user wants the maximum that the drive * is capable of, just set the low bits of the config option to * 0x00ff. */ if ((flags & WDOPT_MULTIMASK) != 0 && (du->dk_multi > 1)) { if (du->dk_multi > (flags & WDOPT_MULTIMASK)) du->dk_multi = flags & WDOPT_MULTIMASK; if (wdcommand(du, 0, 0, 0, du->dk_multi, WDCC_SET_MULTI)) { du->dk_multi = 1; } } else { du->dk_multi = 1; } #ifdef NOTYET /* set read caching and write caching */ wdcommand(du, 0, 0, 0, WDFEA_RCACHE, WDCC_FEATURES); wdcommand(du, 0, 0, 0, WDFEA_WCACHE, WDCC_FEATURES); #endif return (0); } /* ARGSUSED */ int wdclose(dev_t dev, int flags, int fmt, struct proc *p) { dsclose(dev, fmt, wddrives[dkunit(dev)]->dk_slices); return (0); } int wdioctl(dev_t dev, int cmd, caddr_t addr, int flags, struct proc *p) { int lunit = dkunit(dev); register struct disk *du; int error; #ifdef notyet struct uio auio; struct iovec aiov; struct format_op *fop; #endif du = wddrives[lunit]; wdsleep(du->dk_ctrlr, "wdioct"); error = dsioctl(dev, cmd, addr, flags, du->dk_slices, wdstrategy1, (ds_setgeom_t *)NULL); if (error != -1) return (error); switch (cmd) { #ifdef notyet case DIOCWFORMAT: if (!(flag & FWRITE)) return (EBADF); 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; return (error); #endif default: return (ENOTTY); } } #ifdef B_FORMAT int wdformat(struct buf *bp) { bp->b_flags |= B_FORMAT; wdstrategy(bp); /* * phk put this here, better that return(wdstrategy(bp)); * XXX */ return -1; } #endif int wdsize(dev_t dev) { int lunit = dkunit(dev), part = dkpart(dev), val; struct disk *du; struct disklabel *lp; int size; if (lunit >= NWD || (du = wddrives[lunit]) == NULL) { return (-1); } val = 0; if (du->dk_state == CLOSED) { val = wdopen(dkmodpart(dev, RAW_PART), FREAD, S_IFBLK, 0); dsclose(dev, S_IFBLK, du->dk_slices); } if (val != 0 || (lp = dsgetlabel(dev, du->dk_slices)) == NULL) { return (-1); } size = ((int)lp->d_partitions[part].p_size); return size; } /* * Dump core after a system crash. */ int wddump(dev_t dev) { register struct disk *du; 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; u_long ds_offset; char *addr; static int wddoingadump = 0; /* Toss any characters present prior to dump. */ while (cncheckc()) ; /* Check for acceptable device. */ /* XXX should reset to maybe allow du->dk_state < OPEN. */ lunit = dkunit(dev); /* eventually support floppies? */ part = dkpart(dev); if (lunit >= NWD || (du = wddrives[lunit]) == NULL || du->dk_state < OPEN || (lp = dsgetlabel(dev, du->dk_slices)) == NULL) 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 = lp->d_partitions[part].p_size; blkoff = lp->d_partitions[part].p_offset; /* XXX */ ds_offset = du->dk_slices->dss_slices[dkslice(dev)].ds_offset; blkoff += ds_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 && dsgetbad(dev, du->dk_slices) != NULL) { for (blkchk = blknum; blkchk < blknum + blkcnt; blkchk++) { daddr_t blknew; blknew = transbad144(dsgetbad(dev, du->dk_slices), blkchk - ds_offset) + ds_offset; if (blknew != blkchk) { /* Found bad block. */ blkcnt = blkchk - blknum; if (blkcnt > 0) { blknext = blknum + blkcnt; goto out; } blkcnt = 1; blknext = blknum + blkcnt; #if 1 || defined(WDDEBUG) printf("bad block %lu -> %lu\n", blknum, blknew); #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); } if (du->dk_flags & DKFL_32BIT) outsl(du->dk_port + wd_data, CADDR1 + ((int)addr & (NBPG - 1)), DEV_BSIZE / sizeof(long)); else 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 (cncheckc()) 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, dsgetlabel(bp->b_dev, du->dk_slices)); 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; static int timeouts; du = (struct disk *)cdu; x = splbio(); if (du->dk_timeout != 0 && --du->dk_timeout == 0) { if(timeouts++ == 5) wderror((struct buf *)NULL, du, "Last time I say: interrupt timeout. Probably a portable PC."); else if(timeouts++ < 5) 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; /* * This delay is really too long, but does not impact the performance * as much when using the multi-sector option. Shorter delays have * caused I/O errors on some drives and system configs. This should * probably be fixed if we develop a better short term delay mechanism. */ DELAY(1); 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 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); else DELAY(1); } while (--timeout != 0); return (-1); } #endif /* NWDC > 0 */