74d2d21c68
too long, but does not impact performance very much when using the NSECS_MULTI option. This will help solve some mysterious IDE I/O problems.
1972 lines
53 KiB
C
1972 lines
53 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)wd.c 7.2 (Berkeley) 5/9/91
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* $Id: wd.c,v 1.73 1995/04/14 22:31:58 phk Exp $
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*/
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/* TODO:
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* o Bump error count after timeout.
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* o Satisfy ATA timing in all cases.
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* o Finish merging berry/sos timeout code (bump error count...).
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* o Merge/fix TIH/NetBSD bad144 code.
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* o Don't use polling except for initialization. Need to
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* reorganize the state machine. Then "extra" interrupts
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* shouldn't happen (except maybe one for initialization).
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* o Fix disklabel, boot and driver inconsistencies with
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* bad144 in standard versions.
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* o Support extended DOS partitions.
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* o Support swapping to DOS partitions.
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* o Handle bad sectors, clustering, disklabelling, DOS
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* partitions and swapping driver-independently. Use
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* i386/dkbad.c for bad sectors. Swapping will need new
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* driver entries for polled reinit and polled write).
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*/
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#include "wd.h"
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#if NWDC > 0
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#include <sys/param.h>
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#include <sys/dkbad.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <sys/devconf.h>
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#include <machine/bootinfo.h>
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#include <machine/clock.h>
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#include <machine/md_var.h>
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#include <i386/i386/cons.h>
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#include <i386/isa/isa.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/wdreg.h>
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#include <sys/syslog.h>
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#include <sys/dkstat.h>
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#include <vm/vm.h>
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#define TIMEOUT 10000
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#define RETRIES 5 /* number of retries before giving up */
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#define RECOVERYTIME 500000 /* usec for controller to recover after err */
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#define MAXTRANSFER 255 /* max size of transfer in sectors */
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/* correct max is 256 but some controllers */
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/* can't handle that in all cases */
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#ifndef NSECS_MULTI
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#define NSECS_MULTI 1
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#endif
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static int wd_goaway(struct kern_devconf *, int);
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static int wdc_goaway(struct kern_devconf *, int);
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static int wd_externalize(struct proc *, struct kern_devconf *, void *, size_t);
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static int wdc_externalize(struct proc *, struct kern_devconf *, void *, size_t);
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/*
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* Templates for the kern_devconf structures used when we attach.
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*/
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static struct kern_devconf kdc_wd[NWD] = { {
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0, 0, 0, /* filled in by kern_devconf.c */
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"wd", 0, { MDDT_DISK, 0 },
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wd_externalize, 0, wd_goaway, DISK_EXTERNALLEN,
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0, /* parent */
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0, /* parentdata */
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DC_UNKNOWN, /* state */
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"ST506/ESDI/IDE disk", /* description */
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DC_CLS_DISK /* class */
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} };
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static struct kern_devconf kdc_wdc[NWDC] = { {
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0, 0, 0, /* filled in by kern_devconf.c */
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"wdc", 0, { MDDT_ISA, 0 },
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isa_generic_externalize, 0, wdc_goaway, ISA_EXTERNALLEN,
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&kdc_isa0, /* parent */
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0, /* parentdata */
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DC_UNCONFIGURED, /* state */
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"ST506/ESDI/IDE disk controller",
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DC_CLS_MISC /* just an ordinary device */
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} };
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static inline void
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wd_registerdev(int ctlr, int unit)
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{
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if(unit != 0)
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kdc_wd[unit] = kdc_wd[0];
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kdc_wd[unit].kdc_unit = unit;
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kdc_wd[unit].kdc_parent = &kdc_wdc[ctlr];
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dev_attach(&kdc_wd[unit]);
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}
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static inline void
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wdc_registerdev(struct isa_device *dvp)
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{
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int unit = dvp->id_unit;
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if(unit != 0)
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kdc_wdc[unit] = kdc_wdc[0];
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kdc_wdc[unit].kdc_unit = unit;
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kdc_wdc[unit].kdc_parentdata = dvp;
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dev_attach(&kdc_wdc[unit]);
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}
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static int
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wdc_goaway(struct kern_devconf *kdc, int force)
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{
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if(force) {
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dev_detach(kdc);
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return 0;
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} else {
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return EBUSY; /* XXX fix */
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}
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}
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static int
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wd_goaway(struct kern_devconf *kdc, int force)
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{
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dev_detach(kdc);
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return 0;
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}
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/*
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* This biotab field doubles as a field for the physical unit number on
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* the controller.
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*/
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#define id_physid id_scsiid
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/*
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* Drive states. Used to initialize drive.
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*/
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#define CLOSED 0 /* disk is closed. */
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#define WANTOPEN 1 /* open requested, not started */
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#define RECAL 2 /* doing restore */
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#define OPEN 3 /* done with open */
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/*
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* Disk geometry. A small part of struct disklabel.
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* XXX disklabel.5 contains an old clone of disklabel.h.
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*/
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struct diskgeom {
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u_long d_secsize; /* # of bytes per sector */
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u_long d_nsectors; /* # of data sectors per track */
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u_long d_ntracks; /* # of tracks per cylinder */
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u_long d_ncylinders; /* # of data cylinders per unit */
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u_long d_secpercyl; /* # of data sectors per cylinder */
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u_long d_secperunit; /* # of data sectors per unit */
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u_long d_precompcyl; /* XXX always 0 */
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};
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/*
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* The structure of a disk drive.
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*/
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struct disk {
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long dk_bc; /* byte count left */
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short dk_skip; /* blocks already transferred */
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char dk_ctrlr; /* physical controller number */
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char dk_unit; /* physical unit number */
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char dk_lunit; /* logical unit number */
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char dk_state; /* control state */
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u_char dk_status; /* copy of status reg. */
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u_char dk_error; /* copy of error reg. */
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u_char dk_timeout; /* countdown to next timeout */
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short dk_port; /* i/o port base */
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short dk_flags; /* drive characteistics found */
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#define DKFL_SINGLE 0x00004 /* sector at a time mode */
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#define DKFL_ERROR 0x00008 /* processing a disk error */
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#define DKFL_LABELLING 0x00080 /* readdisklabel() in progress */
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#define DKFL_32BIT 0x00100 /* use 32-bit i/o mode */
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#define DKFL_MULTI 0x00200 /* use multi-i/o mode */
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struct wdparams dk_params; /* ESDI/IDE drive/controller parameters */
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int dk_dkunit; /* disk stats unit number */
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int dk_multi; /* multi transfers */
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int dk_currentiosize; /* current io size */
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struct diskgeom dk_dd; /* device configuration data */
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struct diskslices *dk_slices; /* virtual drives */
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};
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#define WD_COUNT_RETRIES
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static int wdtest = 0;
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static struct disk *wddrives[NWD]; /* table of units */
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static struct buf wdtab[NWDC];
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static struct buf wdutab[NWD]; /* head of queue per drive */
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#ifdef notyet
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static struct buf rwdbuf[NWD]; /* buffers for raw IO */
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#endif
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static int wdprobe(struct isa_device *dvp);
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static int wdattach(struct isa_device *dvp);
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static void wdustart(struct disk *du);
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static void wdstart(int ctrlr);
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static int wdcontrol(struct buf *bp);
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static int wdcommand(struct disk *du, u_int cylinder, u_int head,
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u_int sector, u_int count, u_int command);
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static int wdsetctlr(struct disk *du);
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static int wdwsetctlr(struct disk *du);
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static int wdgetctlr(struct disk *du);
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static void wderror(struct buf *bp, struct disk *du, char *mesg);
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static void wdflushirq(struct disk *du, int old_ipl);
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static int wdreset(struct disk *du);
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static void wdsleep(int ctrlr, char *wmesg);
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static void wdstrategy1(struct buf *bp);
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static timeout_t wdtimeout;
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static int wdunwedge(struct disk *du);
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static int wdwait(struct disk *du, u_char bits_wanted, int timeout);
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/*
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* Provide hw.devconf information.
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*/
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static int
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wd_externalize(struct proc *p, struct kern_devconf *kdc, void *userp, size_t len)
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{
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return disk_externalize(wddrives[kdc->kdc_unit]->dk_unit, userp, &len);
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}
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struct isa_driver wdcdriver = {
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wdprobe, wdattach, "wdc",
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};
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/*
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* Probe for controller.
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*/
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static int
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wdprobe(struct isa_device *dvp)
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{
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int unit = dvp->id_unit;
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struct disk *du;
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if (unit >= NWDC)
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return (0);
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du = malloc(sizeof *du, M_TEMP, M_NOWAIT);
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if (du == NULL)
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return (0);
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bzero(du, sizeof *du);
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du->dk_ctrlr = dvp->id_unit;
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du->dk_port = dvp->id_iobase;
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wdc_registerdev(dvp);
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/* check if we have registers that work */
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outb(du->dk_port + wd_cyl_lo, 0xa5); /* wd_cyl_lo is read/write */
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if (inb(du->dk_port + wd_cyl_lo) == 0xff) /* XXX too weak */
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goto nodevice;
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if (wdreset(du) != 0 && (DELAY(RECOVERYTIME), wdreset(du)) != 0)
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goto nodevice;
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/* execute a controller only command */
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if (wdcommand(du, 0, 0, 0, 0, WDCC_DIAGNOSE) != 0
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|| wdwait(du, 0, TIMEOUT) < 0)
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goto nodevice;
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/*
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* drive(s) did not time out during diagnostic :
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* Get error status and check that both drives are OK.
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* Table 9-2 of ATA specs suggests that we must check for
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* a value of 0x01
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*
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* Strangely, some controllers will return a status of
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* 0x81 (drive 0 OK, drive 1 failure), and then when
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* the DRV bit is set, return status of 0x01 (OK) for
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* drive 2. (This seems to contradict the ATA spec.)
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*/
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du->dk_error = inb(du->dk_port + wd_error);
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/* printf("Error : %x\n", du->dk_error); */
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if(du->dk_error != 0x01) {
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if(du->dk_error & 0x80) { /* drive 1 failure */
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/* first set the DRV bit */
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u_int sdh;
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sdh = inb(du->dk_port+ wd_sdh);
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sdh = sdh | 0x10;
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outb(du->dk_port+ wd_sdh, sdh);
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/* Wait, to make sure drv 1 has completed diags */
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if ( wdwait(du, 0, TIMEOUT) < 0)
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goto nodevice;
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/* Get status for drive 1 */
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du->dk_error = inb(du->dk_port + wd_error);
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/* printf("Error (drv 1) : %x\n", du->dk_error); */
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if(du->dk_error != 0x01)
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goto nodevice;
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} else /* drive 0 fail */
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goto nodevice;
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}
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|
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free(du, M_TEMP);
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return (IO_WDCSIZE);
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nodevice:
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free(du, M_TEMP);
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return (0);
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}
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|
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/*
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* Attach each drive if possible.
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*/
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static int
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wdattach(struct isa_device *dvp)
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{
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int unit, lunit;
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struct isa_device *wdup;
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struct disk *du;
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|
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if (dvp->id_unit >= NWDC)
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return (0);
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kdc_wdc[dvp->id_unit].kdc_state = DC_UNKNOWN; /* XXX */
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for (wdup = isa_biotab_wdc; wdup->id_driver != 0; wdup++) {
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if (wdup->id_iobase != dvp->id_iobase)
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continue;
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lunit = wdup->id_unit;
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if (lunit >= NWD)
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continue;
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unit = wdup->id_physid;
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du = malloc(sizeof *du, M_TEMP, M_NOWAIT);
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if (du == NULL)
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continue;
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if (wddrives[lunit] != NULL)
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panic("drive attached twice");
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wddrives[lunit] = du;
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bzero(du, sizeof *du);
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du->dk_ctrlr = dvp->id_unit;
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du->dk_unit = unit;
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du->dk_lunit = lunit;
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du->dk_port = dvp->id_iobase;
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if (wdgetctlr(du) == 0) {
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char buf[sizeof du->dk_params.wdp_model + 1];
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|
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/*
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* Print out description of drive.
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* wdp_model may not be null terminated, and printf
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* doesn't support "%.*s" :-(, so copy wdp_model
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* and add a null before printing.
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*/
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bcopy(du->dk_params.wdp_model, buf, sizeof buf - 1);
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buf[sizeof buf - 1] = '\0';
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printf("wdc%d: unit %d (wd%d): <%s>",
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dvp->id_unit, unit, lunit, buf);
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if (du->dk_flags & DKFL_32BIT)
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printf(", 32-bit");
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if (du->dk_multi > 1)
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printf(", multi-block-%d", du->dk_multi);
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printf("\n");
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if (du->dk_params.wdp_heads == 0)
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printf("wd%d: size unknown, using %s values\n",
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lunit, du->dk_dd.d_secperunit > 17
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? "BIOS" : "fake");
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printf(
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"wd%d: %luMB (%lu sectors), %lu cyls, %lu heads, %lu S/T, %lu B/S\n",
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lunit,
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du->dk_dd.d_secperunit
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|
* du->dk_dd.d_secsize / (1024 * 1024),
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|
du->dk_dd.d_secperunit,
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du->dk_dd.d_ncylinders,
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|
du->dk_dd.d_ntracks,
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|
du->dk_dd.d_nsectors,
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|
du->dk_dd.d_secsize);
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|
|
|
/*
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|
* Start timeout routine for this drive.
|
|
* XXX timeout should be per controller.
|
|
*/
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|
wdtimeout(du);
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|
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|
wd_registerdev(dvp->id_unit, lunit);
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|
if (dk_ndrive < DK_NDRIVE) {
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sprintf(dk_names[dk_ndrive], "wd%d", lunit);
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/*
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|
* XXX we don't know the transfer rate of the
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|
* drive. Guess the maximum ISA rate of
|
|
* 4MB/sec. `wpms' is words per _second_
|
|
* according to iostat.
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|
*/
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|
dk_wpms[dk_ndrive] = 4 * 1024 * 1024 / 2;
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|
du->dk_dkunit = dk_ndrive++;
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|
} else {
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|
du->dk_dkunit = -1;
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|
}
|
|
} else {
|
|
free(du, M_TEMP);
|
|
wddrives[lunit] = NULL;
|
|
}
|
|
}
|
|
|
|
/*
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|
* Discard any interrupts generated by wdgetctlr(). wdflushirq()
|
|
* doesn't work now because the ambient ipl is too high.
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|
*/
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|
wdtab[dvp->id_unit].b_active = 2;
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|
|
|
return (1);
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}
|
|
|
|
/* 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
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|
* be a multiple of a sector in length.
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|
*/
|
|
void
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wdstrategy(register struct buf *bp)
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|
{
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register struct buf *dp;
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struct disk *du;
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int lunit = dkunit(bp->b_dev);
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|
int s;
|
|
|
|
/* valid unit, controller, and request? */
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|
if (lunit >= NWD || bp->b_blkno < 0 || (du = wddrives[lunit]) == NULL
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|| bp->b_bcount % DEV_BSIZE != 0) {
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|
|
|
bp->b_error = EINVAL;
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bp->b_flags |= B_ERROR;
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goto done;
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}
|
|
|
|
/*
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|
* Do bounds checking, adjust transfer, set b_cylin and b_pbklno.
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|
*/
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|
if (dscheck(bp, du->dk_slices) <= 0)
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goto done;
|
|
|
|
/*
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|
* 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) {
|
|
printf("wdc%d: extra interrupt\n", unit);
|
|
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;
|
|
|
|
if (wdwait(du, 0, TIMEOUT) < 0)
|
|
return (1);
|
|
wdc = du->dk_port;
|
|
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;
|
|
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 (! (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
|
|
|
|
du->dk_multi = 1;
|
|
if( (NSECS_MULTI != 1) && ((wp->wdp_nsecperint & 0xff) >= NSECS_MULTI)){
|
|
if( !wdcommand(du, 0, 0, 0, NSECS_MULTI, WDCC_SET_MULTI)) {
|
|
du->dk_multi = NSECS_MULTI;
|
|
}
|
|
}
|
|
|
|
#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 NSECS_MULTI 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 */
|