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1728 lines
46 KiB
C
1728 lines
46 KiB
C
#define WD_COUNT_RETRIES
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static int wdtest = 0;
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/*-
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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 1.33 1994/02/23 11:14:26 rgrimes Exp $
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*/
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/* TODO:
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* o Fix timeout from 2 to about 4 seconds.
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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 Merge/fix Dyson/NetBSD clustering 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 Look at latest linux clustering methods. Our disksort()
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* gets in the way of clustering.
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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 "param.h"
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#include "dkbad.h"
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#include "systm.h"
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#include "kernel.h"
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#include "conf.h"
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#include "file.h"
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#include "stat.h"
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#include "ioctl.h"
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#include "disklabel.h"
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#include "buf.h"
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#include "uio.h"
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#include "malloc.h"
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#include "machine/cpu.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 "syslog.h"
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#include "vm/vm.h"
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#define TIMEOUT 10000 /* XXX? WDCC_DIAGNOSE can take > 1.1 sec */
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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 256 /* max size of transfer in sectors */
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#ifdef notyet
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#define wdnoreloc(dev) (minor(dev) & 0x80) /* ignore partition table */
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#endif
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#define wddospart(dev) (minor(dev) & 0x40) /* use dos partitions */
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#define wdunit(dev) ((minor(dev) & 0x38) >> 3)
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#define wdpart(dev) (minor(dev) & 0x7)
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#define makewddev(maj, unit, part) (makedev(maj,((unit<<3)+part)))
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#define WDRAW 3 /* 'd' partition isn't a partition! */
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/* Cylinder number for doing IO to. Shares an entry in the buf struct. */
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#define b_cylin b_resid
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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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* 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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u_long dk_copenpart; /* character units open on this drive */
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u_long dk_bopenpart; /* block units open on this drive */
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u_long dk_openpart; /* all units open on this drive */
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short dk_wlabel; /* label writable? */
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short dk_flags; /* drive characteistics found */
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#define DKFL_DOSPART 0x00001 /* has DOS partition table */
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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_BSDLABEL 0x00010 /* has a BSD disk label */
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#define DKFL_BADSECT 0x00020 /* has a bad144 badsector table */
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#define DKFL_WRITEPROT 0x00040 /* manual unit write protect */
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#define DKFL_LABELLING 0x00080 /* readdisklabel() in progress */
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struct wdparams dk_params; /* ESDI/IDE drive/controller parameters */
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struct disklabel dk_dd; /* device configuration data */
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struct disklabel dk_dd2; /* DOS view converted to label */
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struct dos_partition
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dk_dospartitions[NDOSPART]; /* DOS view of disk */
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struct dkbad dk_bad; /* bad sector table */
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};
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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 long wdxfer[NWD]; /* count of transfers */
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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 wdtimeout(caddr_t cdu, int ticks);
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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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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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/* 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) != 0xa5)
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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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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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* 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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if (dvp->id_unit >= NWDC)
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return (0);
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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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/*
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* Print out description of drive.
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* wdp_model can be [0..40] bytes, thus \0 can be missing so
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* so copy it and add a null before printing.
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*/
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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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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>\n",
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dvp->id_unit, unit, lunit, buf);
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if (du->dk_params.wdp_heads == 0)
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printf("wd%d: size unknown\n", lunit);
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else
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printf("wd%d: %luMB (%lu total sec), ",
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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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printf("%lu cyl, %lu head, %lu sec, bytes/sec %lu\n",
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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.
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* XXX timeout should be per controller.
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*/
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wdtimeout((caddr_t)du, 0);
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} else {
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free(du, M_TEMP);
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wddrives[lunit] = NULL;
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}
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}
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/*
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* Discard any interrupts generated by wdgetctlr(). wdflushirq()
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* 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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}
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/* Read/write routine for a buffer. Finds the proper unit, range checks
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* arguments, and schedules the transfer. Does not wait for the transfer
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* 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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*/
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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 = wdunit(bp->b_dev);
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int s;
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/* 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_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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/* "soft" write protect check */
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if ((du->dk_flags & DKFL_WRITEPROT) && (bp->b_flags & B_READ) == 0) {
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bp->b_error = EROFS;
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bp->b_flags |= B_ERROR;
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goto done;
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}
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/*
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* Do bounds checking, adjust transfer, and set b_cylin.
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*/
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if (bounds_check_with_label(bp, wddospart(bp->b_dev)
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? &du->dk_dd2 : &du->dk_dd,
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du->dk_wlabel) <= 0)
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goto done;
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/* queue transfer on drive, activate drive and controller if idle */
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dp = &wdutab[lunit];
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s = splbio();
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disksort(dp, bp);
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if (dp->b_active == 0)
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wdustart(du); /* start drive */
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/* Pick up changes made by readdisklabel(). */
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if (du->dk_flags & DKFL_LABELLING && du->dk_state > RECAL) {
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wdsleep(du->dk_ctrlr, "wdlab");
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du->dk_state = WANTOPEN;
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}
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if (wdtab[du->dk_ctrlr].b_active == 0)
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wdstart(du->dk_ctrlr); /* start controller */
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splx(s);
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return;
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done:
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/* toss transfer, we're done early */
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biodone(bp);
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}
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/*
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* Routine to queue a command to the controller. The unit's
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* request is linked into the active list for the controller.
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* If the controller is idle, the transfer is started.
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*/
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static void
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wdustart(register struct disk *du)
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{
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register struct buf *bp, *dp = &wdutab[du->dk_lunit];
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int ctrlr = du->dk_ctrlr;
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/* unit already active? */
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if (dp->b_active)
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return;
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|
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/* anything to start? */
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bp = dp->b_actf;
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if (bp == NULL)
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return;
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|
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/* link onto controller queue */
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dp->b_forw = NULL;
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if (wdtab[ctrlr].b_actf == NULL)
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wdtab[ctrlr].b_actf = dp;
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else
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wdtab[ctrlr].b_actl->b_forw = dp;
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wdtab[ctrlr].b_actl = dp;
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|
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/* mark the drive unit as busy */
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dp->b_active = 1;
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}
|
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|
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/*
|
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* Controller startup routine. This does the calculation, and starts
|
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* a single-sector read or write operation. Called to start a transfer,
|
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* or from the interrupt routine to continue a multi-sector transfer.
|
|
* RESTRICTIONS:
|
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* 1. The transfer length must be an exact multiple of the sector size.
|
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*/
|
|
|
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static void
|
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wdstart(int ctrlr)
|
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{
|
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register struct disk *du;
|
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register struct buf *bp;
|
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struct disklabel *lp;
|
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struct buf *dp;
|
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register struct bt_bad *bt_ptr;
|
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long blknum, cylin, head, sector;
|
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long secpertrk, secpercyl;
|
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int lunit;
|
|
|
|
loop:
|
|
/* is there a drive for the controller to do a transfer with? */
|
|
dp = wdtab[ctrlr].b_actf;
|
|
if (dp == NULL)
|
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return;
|
|
|
|
/*
|
|
* Is there a transfer to this drive? If so, link it on the
|
|
* controller's queue.
|
|
*/
|
|
bp = dp->b_actf;
|
|
if (bp == NULL) {
|
|
wdtab[ctrlr].b_actf = dp->b_forw;
|
|
goto loop;
|
|
}
|
|
|
|
/* obtain controller and drive information */
|
|
lunit = wdunit(bp->b_dev);
|
|
du = wddrives[lunit];
|
|
|
|
/* if not really a transfer, do control operations specially */
|
|
if (du->dk_state < OPEN) {
|
|
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",
|
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du->dk_lunit, du->dk_state);
|
|
return;
|
|
}
|
|
|
|
/* calculate transfer details */
|
|
blknum = bp->b_blkno + 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",
|
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bp->b_bcount, blknum);
|
|
else
|
|
printf(" %d)%x", du->dk_skip, inb(du->dk_port + wd_altsts));
|
|
#endif
|
|
if (du->dk_skip == 0)
|
|
du->dk_bc = bp->b_bcount;
|
|
|
|
lp = &du->dk_dd;
|
|
secpertrk = lp->d_nsectors;
|
|
secpercyl = lp->d_secpercyl;
|
|
if (wddospart(bp->b_dev))
|
|
blknum += du->dk_dd2.d_partitions[wdpart(bp->b_dev)].p_offset;
|
|
else
|
|
blknum += lp->d_partitions[wdpart(bp->b_dev)].p_offset;
|
|
cylin = blknum / secpercyl;
|
|
head = (blknum % secpercyl) / secpertrk;
|
|
sector = blknum % secpertrk;
|
|
|
|
/*
|
|
* See if the current block is in the bad block list.
|
|
* (If we have one, and not formatting.)
|
|
*/
|
|
if ((du->dk_flags & (DKFL_SINGLE | DKFL_BADSECT))
|
|
== (DKFL_SINGLE | DKFL_BADSECT))
|
|
#define BAD144_NO_CYL 0xffff /* XXX should be in dkbad.h; bad144.c uses -1 */
|
|
for (bt_ptr = du->dk_bad.bt_bad; bt_ptr->bt_cyl != BAD144_NO_CYL;
|
|
bt_ptr++) {
|
|
if (bt_ptr->bt_cyl > cylin)
|
|
/* Sorted list, and we passed our cylinder. quit. */
|
|
break;
|
|
if (bt_ptr->bt_cyl == cylin &&
|
|
bt_ptr->bt_trksec == (head << 8) + sector) {
|
|
/*
|
|
* Found bad block. Calculate new block number.
|
|
* This starts at the end of the disk (skip the
|
|
* last track which is used for the bad block list),
|
|
* and works backwards to the front of the disk.
|
|
*/
|
|
#ifdef WDDEBUG
|
|
printf("--- badblock code -> Old = %ld; ", blknum);
|
|
#endif
|
|
|
|
/*
|
|
* XXX the offset of the bad sector table ought
|
|
* to be stored in the in-core copy of the table.
|
|
*/
|
|
#define BAD144_PART 2 /* XXX scattered magic numbers */
|
|
#define BSD_PART 0 /* XXX should be 2 but bad144.c uses 0 */
|
|
if (lp->d_partitions[BSD_PART].p_offset != 0)
|
|
blknum = lp->d_partitions[BAD144_PART].p_offset
|
|
+ lp->d_partitions[BAD144_PART].p_size;
|
|
else
|
|
blknum = lp->d_secperunit;
|
|
blknum -= lp->d_nsectors + (bt_ptr - du->dk_bad.bt_bad)
|
|
+ 1;
|
|
|
|
cylin = blknum / secpercyl;
|
|
head = (blknum % secpercyl) / secpertrk;
|
|
sector = blknum % secpertrk;
|
|
#ifdef WDDEBUG
|
|
printf("new = %ld\n", blknum);
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
|
|
wdtab[ctrlr].b_active = 1; /* mark controller active */
|
|
|
|
/* if starting a multisector transfer, or doing single transfers */
|
|
if (du->dk_skip == 0 || (du->dk_flags & DKFL_SINGLE)) {
|
|
u_int command;
|
|
u_int count;
|
|
|
|
if (wdtab[ctrlr].b_errcnt && (bp->b_flags & B_READ) == 0)
|
|
du->dk_bc += DEV_BSIZE;
|
|
|
|
#ifdef B_FORMAT
|
|
if (bp->b_flags & B_FORMAT) {
|
|
command = WDCC_FORMAT;
|
|
count = lp->d_nsectors;
|
|
sector = lp->d_gap3 - 1; /* + 1 later */
|
|
} else
|
|
#endif
|
|
{
|
|
if (du->dk_flags & DKFL_SINGLE)
|
|
count = 1;
|
|
else
|
|
count = howmany(du->dk_bc, DEV_BSIZE);
|
|
command = (bp->b_flags & B_READ)
|
|
? WDCC_READ : WDCC_WRITE;
|
|
}
|
|
|
|
/*
|
|
* XXX this loop may never terminate. The code to handle
|
|
* counting down of retries and eventually failing the i/o
|
|
* is in wdintr() and we can't get there from here.
|
|
*/
|
|
if (wdtest != 0) {
|
|
if (--wdtest == 0) {
|
|
wdtest = 100;
|
|
printf("dummy wdunwedge\n");
|
|
wdunwedge(du);
|
|
}
|
|
}
|
|
while (wdcommand(du, cylin, head, sector, count, command)
|
|
!= 0) {
|
|
wderror(bp, du,
|
|
"wdstart: timeout waiting to give command");
|
|
wdunwedge(du);
|
|
}
|
|
#ifdef WDDEBUG
|
|
printf("cylin %ld head %ld sector %ld addr %x sts %x\n",
|
|
cylin, head, sector,
|
|
(int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE,
|
|
inb(du->dk_port + wd_altsts));
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Schedule wdtimeout() to wake up after a few seconds. Retrying
|
|
* unmarked bad blocks can take 3 seconds! Then it is not good that
|
|
* we retry 5 times.
|
|
*
|
|
* XXX wdtimeout() doesn't increment the error count so we may loop
|
|
* forever. More seriously, the loop isn't forever but causes a
|
|
* crash.
|
|
*
|
|
* TODO fix b_resid bug elsewhere (fd.c....). Fix short but positive
|
|
* counts being discarded after there is an error (in physio I
|
|
* think). Discarding them would be OK if the (special) file offset
|
|
* was not advanced.
|
|
*/
|
|
du->dk_timeout = 1 + 1;
|
|
|
|
/* If this is a read operation, just go away until it's done. */
|
|
if (bp->b_flags & B_READ)
|
|
return;
|
|
|
|
/* Ready to send data? */
|
|
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) < 0) {
|
|
wderror(bp, du, "wdstart: timeout waiting for DRQ");
|
|
/*
|
|
* XXX what do we do now? If we've just issued the command,
|
|
* then we can treat this failure the same as a command
|
|
* failure. But if we are continuing a multi-sector write,
|
|
* the command was issued ages ago, so we can't simply
|
|
* restart it.
|
|
*
|
|
* XXX we waste a lot of time unnecessarily translating block
|
|
* numbers to cylin/head/sector for continued i/o's.
|
|
*/
|
|
}
|
|
|
|
/* then send it! */
|
|
outsw(du->dk_port + wd_data,
|
|
(void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE),
|
|
DEV_BSIZE / sizeof(short));
|
|
du->dk_bc -= DEV_BSIZE;
|
|
}
|
|
|
|
/* Interrupt routine for the controller. Acknowledge the interrupt, check for
|
|
* errors on the current operation, mark it done if necessary, and start
|
|
* the next request. Also check for a partially done transfer, and
|
|
* continue with the next chunk if so.
|
|
*/
|
|
void
|
|
wdintr(int unit)
|
|
{
|
|
register struct disk *du;
|
|
register struct buf *bp, *dp;
|
|
|
|
if (wdtab[unit].b_active == 2)
|
|
return; /* intr in wdflushirq() */
|
|
if (!wdtab[unit].b_active) {
|
|
printf("wdc%d: extra interrupt\n", unit);
|
|
return;
|
|
}
|
|
|
|
dp = wdtab[unit].b_actf;
|
|
bp = dp->b_actf;
|
|
du = wddrives[wdunit(bp->b_dev)];
|
|
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;
|
|
if (wdcontrol(bp))
|
|
wdstart(unit);
|
|
return;
|
|
}
|
|
|
|
/* have we an error? */
|
|
if (du->dk_status & (WDCS_ERR | WDCS_ECCCOR)) {
|
|
oops:
|
|
#ifdef WDDEBUG
|
|
wderror(bp, du, "wdintr");
|
|
#endif
|
|
if ((du->dk_flags & DKFL_SINGLE) == 0) {
|
|
du->dk_flags |= DKFL_ERROR;
|
|
goto outt;
|
|
}
|
|
#ifdef B_FORMAT
|
|
if (bp->b_flags & B_FORMAT) {
|
|
bp->b_error = EIO;
|
|
bp->b_flags |= B_ERROR;
|
|
goto done;
|
|
}
|
|
#endif
|
|
|
|
/* error or error correction? */
|
|
if (du->dk_status & WDCS_ERR) {
|
|
if (++wdtab[unit].b_errcnt < RETRIES) {
|
|
wdtab[unit].b_active = 0;
|
|
} else {
|
|
wderror(bp, du, "hard error");
|
|
bp->b_error = EIO;
|
|
bp->b_flags |= B_ERROR; /* flag the error */
|
|
}
|
|
} else
|
|
wderror(bp, du, "soft ecc");
|
|
}
|
|
|
|
/*
|
|
* If this was a successful read operation, fetch the data.
|
|
*/
|
|
if (((bp->b_flags & (B_READ | B_ERROR)) == B_READ)
|
|
&& wdtab[unit].b_active) {
|
|
int chk, dummy;
|
|
|
|
chk = min(DEV_BSIZE / sizeof(short), du->dk_bc / sizeof(short));
|
|
|
|
/* ready to receive data? */
|
|
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) != 0) {
|
|
wderror(bp, du, "wdintr: read error detected late");
|
|
goto oops;
|
|
}
|
|
|
|
/* suck in data */
|
|
insw(du->dk_port + wd_data,
|
|
(void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE),
|
|
chk);
|
|
du->dk_bc -= chk * sizeof(short);
|
|
|
|
/* XXX for obsolete fractional sector reads. */
|
|
while (chk++ < DEV_BSIZE / sizeof(short))
|
|
insw(du->dk_port + wd_data, &dummy, 1);
|
|
}
|
|
|
|
wdxfer[du->dk_lunit]++;
|
|
outt:
|
|
if (wdtab[unit].b_active) {
|
|
if ((bp->b_flags & B_ERROR) == 0) {
|
|
du->dk_skip++; /* add to successful sectors */
|
|
if (wdtab[unit].b_errcnt)
|
|
wderror(bp, du, "soft error");
|
|
wdtab[unit].b_errcnt = 0;
|
|
|
|
/* see if more to transfer */
|
|
if (du->dk_bc > 0 && (du->dk_flags & DKFL_ERROR) == 0) {
|
|
wdtab[unit].b_active = 0;
|
|
wdstart(unit);
|
|
return; /* next chunk is started */
|
|
} else if ((du->dk_flags & (DKFL_SINGLE | DKFL_ERROR))
|
|
== DKFL_ERROR) {
|
|
du->dk_skip = 0;
|
|
du->dk_flags &= ~DKFL_ERROR;
|
|
du->dk_flags |= DKFL_SINGLE;
|
|
wdtab[unit].b_active = 0;
|
|
wdstart(unit);
|
|
return; /* redo xfer sector by sector */
|
|
}
|
|
}
|
|
#ifdef B_FORMAT
|
|
done: ;
|
|
#endif
|
|
/* done with this transfer, with or without error */
|
|
du->dk_flags &= ~DKFL_SINGLE;
|
|
wdtab[unit].b_actf = dp->b_forw;
|
|
wdtab[unit].b_errcnt = 0;
|
|
bp->b_resid = bp->b_bcount - du->dk_skip * DEV_BSIZE;
|
|
du->dk_skip = 0;
|
|
dp->b_active = 0;
|
|
dp->b_actf = bp->av_forw;
|
|
dp->b_errcnt = 0;
|
|
biodone(bp);
|
|
}
|
|
|
|
/* controller idle */
|
|
wdtab[unit].b_active = 0;
|
|
|
|
/* anything more on drive queue? */
|
|
if (dp->b_actf)
|
|
wdustart(du);
|
|
/* anything more for controller to do? */
|
|
if (wdtab[unit].b_actf)
|
|
wdstart(unit);
|
|
}
|
|
|
|
/*
|
|
* Initialize a drive.
|
|
*/
|
|
int
|
|
wdopen(dev_t dev, int flags, int fmt, struct proc *p)
|
|
{
|
|
register unsigned int lunit;
|
|
register struct disk *du;
|
|
int part = wdpart(dev), mask = 1 << part;
|
|
struct partition *pp;
|
|
char *msg;
|
|
struct disklabel save_label;
|
|
unsigned long save_heads;
|
|
|
|
lunit = wdunit(dev);
|
|
if (lunit >= NWD)
|
|
return (ENXIO);
|
|
du = wddrives[lunit];
|
|
if (du == NULL)
|
|
return (ENXIO);
|
|
|
|
/* Finish flushing IRQs left over from wdattach(). */
|
|
if (wdtab[du->dk_ctrlr].b_active == 2)
|
|
wdtab[du->dk_ctrlr].b_active = 0;
|
|
|
|
/*
|
|
* That's all for valid DOS partitions. We don't need a BSD label.
|
|
* The openmask is only used for checking BSD partitions so we don't
|
|
* need to maintain it.
|
|
*/
|
|
if (wddospart(dev)) {
|
|
/* XXX we do need a disklabel for now. */
|
|
if ((du->dk_flags & DKFL_BSDLABEL) == 0)
|
|
return (ENXIO);
|
|
|
|
return (part > NDOSPART ? ENXIO : 0);
|
|
}
|
|
|
|
while (du->dk_flags & DKFL_LABELLING)
|
|
tsleep((caddr_t)&du->dk_flags, PZERO - 1, "wdopen", 1);
|
|
if ((du->dk_flags & DKFL_BSDLABEL) == 0) {
|
|
/*
|
|
* wdtab[ctrlr].b_active != 0 implies
|
|
* wdutab[lunit].b_actf == NULL (?)
|
|
* so the following guards most things (until the next i/o).
|
|
* It doesn't guard against a new i/o starting and being
|
|
* affected by the label being changed. Sigh.
|
|
*/
|
|
wdsleep(du->dk_ctrlr, "wdopn1");
|
|
|
|
du->dk_flags |= DKFL_LABELLING | DKFL_WRITEPROT;
|
|
du->dk_state = WANTOPEN;
|
|
wdutab[lunit].b_actf = NULL;
|
|
|
|
/*
|
|
* Read label using WDRAW partition.
|
|
*
|
|
* If the drive has an MBR, then the current geometry (from
|
|
* wdgetctlr()) is used to read it; then the BIOS/DOS
|
|
* geometry is inferred and used to read the label off the
|
|
* 'c' partition. Otherwise the label is read using the
|
|
* current geometry. The label gives the final geometry.
|
|
* If bad sector handling is enabled, then this geometry
|
|
* is used to read the bad sector table. The geometry
|
|
* changes occur inside readdisklabel() and are propagated
|
|
* to the driver by resetting the state machine.
|
|
*/
|
|
save_label = du->dk_dd;
|
|
save_heads = du->dk_dd.d_ntracks;
|
|
#define WDSTRATEGY ((int (*)(struct buf *)) wdstrategy) /* XXX */
|
|
msg = readdisklabel(makewddev(major(dev), lunit, WDRAW),
|
|
(d_strategy_t *) WDSTRATEGY, &du->dk_dd,
|
|
du->dk_dospartitions, &du->dk_bad,
|
|
(struct buf **)NULL);
|
|
du->dk_flags &= ~DKFL_LABELLING;
|
|
if (msg != NULL) {
|
|
du->dk_dd = save_label;
|
|
log(LOG_WARNING, "wd%d: cannot find label (%s)\n",
|
|
lunit, msg);
|
|
if (part != WDRAW)
|
|
return (EINVAL); /* XXX needs translation */
|
|
} else {
|
|
int dospart;
|
|
unsigned long newsize, offset, size;
|
|
|
|
if (du->dk_dd.d_ntracks > 16) {
|
|
printf("wd%d: can't handle %lu heads from partition table (controller value (%lu) restored)\n",
|
|
du->dk_lunit, du->dk_dd.d_ntracks, save_heads);
|
|
du->dk_dd.d_ntracks = save_heads;
|
|
}
|
|
du->dk_flags |= DKFL_BSDLABEL;
|
|
du->dk_flags &= ~DKFL_WRITEPROT;
|
|
if (du->dk_dd.d_flags & D_BADSECT)
|
|
du->dk_flags |= DKFL_BADSECT;
|
|
|
|
/*
|
|
* Force WDRAW partition to be the whole disk.
|
|
*/
|
|
offset = du->dk_dd.d_partitions[WDRAW].p_offset;
|
|
if (offset != 0) {
|
|
printf(
|
|
"wd%d: changing offset of 'd' partition from %lu to 0\n",
|
|
du->dk_lunit, offset);
|
|
du->dk_dd.d_partitions[WDRAW].p_offset = 0;
|
|
}
|
|
size = du->dk_dd.d_partitions[WDRAW].p_size;
|
|
newsize = du->dk_dd.d_secperunit; /* XXX */
|
|
if (size != newsize) {
|
|
printf(
|
|
"wd%d: changing size of 'd' partition from %lu to %lu\n",
|
|
du->dk_lunit, size, newsize);
|
|
du->dk_dd.d_partitions[WDRAW].p_size = newsize;
|
|
}
|
|
|
|
/*
|
|
* Convert DOS partition data to a label.
|
|
*/
|
|
du->dk_dd2 = du->dk_dd;
|
|
bzero(du->dk_dd2.d_partitions,
|
|
sizeof du->dk_dd2.d_partitions);
|
|
du->dk_dd2.d_partitions[0].p_size
|
|
= du->dk_dd.d_secperunit; /* XXX */
|
|
for (dospart = 1; dospart <= NDOSPART; dospart++) {
|
|
du->dk_dd2.d_partitions[dospart].p_offset =
|
|
du->dk_dospartitions[dospart - 1].dp_start;
|
|
du->dk_dd2.d_partitions[dospart].p_size =
|
|
du->dk_dospartitions[dospart - 1].dp_size;
|
|
}
|
|
}
|
|
|
|
/* Pick up changes made by readdisklabel(). */
|
|
wdsleep(du->dk_ctrlr, "wdopn2");
|
|
du->dk_state = WANTOPEN;
|
|
}
|
|
|
|
/*
|
|
* Warn if a partion is opened that overlaps another partition which
|
|
* is open unless one is the "raw" partition (whole disk).
|
|
*/
|
|
if ((du->dk_openpart & mask) == 0 && part != WDRAW) {
|
|
int start, end;
|
|
|
|
pp = &du->dk_dd.d_partitions[part];
|
|
start = pp->p_offset;
|
|
end = pp->p_offset + pp->p_size;
|
|
for (pp = du->dk_dd.d_partitions;
|
|
pp < &du->dk_dd.d_partitions[du->dk_dd.d_npartitions];
|
|
pp++) {
|
|
if (pp->p_offset + pp->p_size <= start ||
|
|
pp->p_offset >= end)
|
|
continue;
|
|
if (pp - du->dk_dd.d_partitions == WDRAW)
|
|
continue;
|
|
if (du->dk_openpart
|
|
& (1 << (pp - du->dk_dd.d_partitions)))
|
|
log(LOG_WARNING,
|
|
"wd%d%c: overlaps open partition (%c)\n",
|
|
lunit, part + 'a',
|
|
pp - du->dk_dd.d_partitions + 'a');
|
|
}
|
|
}
|
|
if (part >= du->dk_dd.d_npartitions && part != WDRAW)
|
|
return (ENXIO);
|
|
|
|
switch (fmt) {
|
|
case S_IFCHR:
|
|
du->dk_copenpart |= mask;
|
|
break;
|
|
case S_IFBLK:
|
|
du->dk_bopenpart |= mask;
|
|
break;
|
|
}
|
|
du->dk_openpart = du->dk_copenpart | du->dk_bopenpart;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Implement operations other than read/write.
|
|
* Called from wdstart or wdintr during opens and formats.
|
|
* Uses finite-state-machine to track progress of operation in progress.
|
|
* Returns 0 if operation still in progress, 1 if completed.
|
|
*/
|
|
static int
|
|
wdcontrol(register struct buf *bp)
|
|
{
|
|
register struct disk *du;
|
|
int ctrlr;
|
|
|
|
du = wddrives[wdunit(bp->b_dev)];
|
|
ctrlr = du->dk_ctrlr;
|
|
|
|
switch (du->dk_state) {
|
|
case WANTOPEN:
|
|
tryagainrecal:
|
|
wdtab[ctrlr].b_active = 1;
|
|
if (wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) != 0) {
|
|
wderror(bp, du, "wdcontrol: wdcommand failed");
|
|
goto maybe_retry;
|
|
}
|
|
du->dk_state = RECAL;
|
|
return (0);
|
|
case RECAL:
|
|
if (du->dk_status & WDCS_ERR || wdsetctlr(du) != 0) {
|
|
wderror(bp, du, "wdcontrol: recal failed");
|
|
maybe_retry:
|
|
if (du->dk_status & WDCS_ERR)
|
|
wdunwedge(du);
|
|
du->dk_state = WANTOPEN;
|
|
if (++wdtab[ctrlr].b_errcnt < RETRIES)
|
|
goto tryagainrecal;
|
|
bp->b_error = ENXIO; /* XXX needs translation */
|
|
bp->b_flags |= B_ERROR;
|
|
return (1);
|
|
}
|
|
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 (1);
|
|
}
|
|
|
|
/*
|
|
* Wait uninterruptibly until controller is not busy, then send it a command.
|
|
* The wait usually terminates immediately because we waited for the previous
|
|
* command to terminate.
|
|
*/
|
|
static int
|
|
wdcommand(struct disk *du, u_int cylinder, u_int head, u_int sector,
|
|
u_int count, u_int command)
|
|
{
|
|
u_int wdc;
|
|
|
|
if (wdwait(du, 0, TIMEOUT) < 0)
|
|
return (1);
|
|
wdc = du->dk_port;
|
|
outb(wdc + wd_precomp, du->dk_dd.d_precompcyl / 4);
|
|
outb(wdc + wd_cyl_lo, cylinder);
|
|
outb(wdc + wd_cyl_hi, cylinder >> 8);
|
|
outb(wdc + wd_sdh, WDSD_IBM | (du->dk_unit << 4) | head);
|
|
outb(wdc + wd_sector, sector + 1);
|
|
outb(wdc + wd_seccnt, count);
|
|
if (wdwait(du, command == WDCC_DIAGNOSE || command == WDCC_IDC
|
|
? 0 : WDCS_READY, TIMEOUT) < 0)
|
|
return (1);
|
|
outb(wdc + wd_command, command);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* issue IDC to drive to tell it just what geometry it is to be.
|
|
*/
|
|
static int
|
|
wdsetctlr(struct disk *du)
|
|
{
|
|
#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 > 16) {
|
|
printf("wd%d: cannot handle %lu heads (truncating to 16)\n",
|
|
du->dk_lunit, du->dk_dd.d_ntracks);
|
|
du->dk_dd.d_ntracks = 16;
|
|
}
|
|
if (wdcommand(du, du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks - 1, 0,
|
|
du->dk_dd.d_nsectors, WDCC_IDC) != 0
|
|
|| wdwait(du, WDCS_READY, TIMEOUT) != 0) {
|
|
wderror((struct buf *)NULL, du, "wdsetctlr failed");
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Wait until driver is inactive, then set up controller.
|
|
*/
|
|
static int
|
|
wdwsetctlr(struct disk *du)
|
|
{
|
|
int stat;
|
|
int x;
|
|
|
|
wdsleep(du->dk_ctrlr, "wdwset");
|
|
x = splbio();
|
|
stat = wdsetctlr(du);
|
|
wdflushirq(du, x);
|
|
splx(x);
|
|
return (stat);
|
|
}
|
|
|
|
/*
|
|
* issue READP to drive to ask it what it is.
|
|
*/
|
|
static int
|
|
wdgetctlr(struct disk *du)
|
|
{
|
|
int i;
|
|
char tb[DEV_BSIZE];
|
|
struct wdparams *wp;
|
|
|
|
if (wdcommand(du, 0, 0, 0, 0, WDCC_READP) != 0
|
|
|| wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) < 0) {
|
|
/* XXX need to check error status after final transfer. */
|
|
/*
|
|
* Old drives don't support WDCC_READP. Try a seek to 0.
|
|
* Some IDE controllers return trash if there is no drive
|
|
* attached, so first test that the drive can be selected.
|
|
* This also avoids long waits for nonexistent drives.
|
|
*/
|
|
if (wdwait(du, 0, TIMEOUT) < 0)
|
|
return (1);
|
|
outb(du->dk_port + wd_sdh, WDSD_IBM | (du->dk_unit << 4));
|
|
DELAY(5000); /* usually unnecessary; drive select is fast */
|
|
if ((inb(du->dk_port + wd_status) & (WDCS_BUSY | WDCS_READY))
|
|
!= WDCS_READY
|
|
|| wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) != 0
|
|
|| wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) != 0)
|
|
return (1);
|
|
|
|
/*
|
|
* Fake minimal drive geometry for reading the MBR.
|
|
* readdisklabel() may enlarge it to read the label and the
|
|
* bad sector table.
|
|
*/
|
|
du->dk_dd.d_secsize = DEV_BSIZE;
|
|
du->dk_dd.d_nsectors = 17;
|
|
du->dk_dd.d_ntracks = 1;
|
|
du->dk_dd.d_ncylinders = 1;
|
|
du->dk_dd.d_secpercyl = 17;
|
|
du->dk_dd.d_secperunit = 17;
|
|
|
|
/*
|
|
* Fake maximal drive size for writing the label.
|
|
*/
|
|
du->dk_dd.d_partitions[WDRAW].p_size = 64 * 16 * 1024;
|
|
|
|
/*
|
|
* Fake some more of the label for printing by disklabel(1)
|
|
* in case there is no real label.
|
|
*/
|
|
du->dk_dd.d_type = DTYPE_ST506;
|
|
du->dk_dd.d_subtype |= DSTYPE_GEOMETRY;
|
|
strncpy(du->dk_dd.d_typename, "Fake geometry",
|
|
sizeof du->dk_dd.d_typename);
|
|
|
|
/* Fake the model name for printing by wdattach(). */
|
|
strncpy(du->dk_params.wdp_model, "unknown",
|
|
sizeof du->dk_params.wdp_model);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* obtain parameters */
|
|
wp = &du->dk_params;
|
|
insw(du->dk_port + wd_data, tb, sizeof(tb) / sizeof(short));
|
|
bcopy(tb, wp, sizeof(struct wdparams));
|
|
|
|
/* shuffle string byte order */
|
|
for (i = 0; i < sizeof(wp->wdp_model); i += 2) {
|
|
u_short *p;
|
|
|
|
p = (u_short *) (wp->wdp_model + i);
|
|
*p = ntohs(*p);
|
|
}
|
|
/*
|
|
* Clean up the wdp_model by converting nulls to spaces, and
|
|
* then removing the trailing spaces.
|
|
*/
|
|
for (i=0; i < sizeof(wp->wdp_model); i++) {
|
|
if (wp->wdp_model[i] == '\0') {
|
|
wp->wdp_model[i] = ' ';
|
|
}
|
|
}
|
|
for (i=sizeof(wp->wdp_model)-1; i>=0 && wp->wdp_model[i]==' '; i--) {
|
|
wp->wdp_model[i] = '\0';
|
|
}
|
|
|
|
#ifdef WDDEBUG
|
|
printf(
|
|
"\nwd(%d,%d): wdgetctlr: gc %x cyl %d trk %d sec %d type %d sz %d model %s\n",
|
|
du->dk_ctrlr, du->dk_unit, wp->wdp_config,
|
|
wp->wdp_fixedcyl + wp->wdp_removcyl, wp->wdp_heads,
|
|
wp->wdp_sectors, wp->wdp_cntype, wp->wdp_cnsbsz,
|
|
wp->wdp_model);
|
|
#endif
|
|
|
|
/* update disklabel given drive information */
|
|
du->dk_dd.d_secsize = DEV_BSIZE;
|
|
du->dk_dd.d_ncylinders = wp->wdp_fixedcyl + wp->wdp_removcyl /*+- 1*/ ;
|
|
du->dk_dd.d_ntracks = wp->wdp_heads;
|
|
du->dk_dd.d_nsectors = wp->wdp_sectors;
|
|
du->dk_dd.d_secpercyl = du->dk_dd.d_ntracks * du->dk_dd.d_nsectors;
|
|
du->dk_dd.d_partitions[WDRAW].p_size = du->dk_dd.d_secperunit
|
|
= du->dk_dd.d_secpercyl * du->dk_dd.d_ncylinders;
|
|
/* dubious ... */
|
|
bcopy("ESDI/IDE", du->dk_dd.d_typename, 9);
|
|
bcopy(wp->wdp_model + 20, du->dk_dd.d_packname, 14 - 1);
|
|
/* better ... */
|
|
du->dk_dd.d_type = DTYPE_ESDI;
|
|
du->dk_dd.d_subtype |= DSTYPE_GEOMETRY;
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
wdclose(dev_t dev, int flags, int fmt)
|
|
{
|
|
register struct disk *du;
|
|
int part = wdpart(dev), mask = 1 << part;
|
|
|
|
if (wddospart(dev))
|
|
return (0);
|
|
|
|
du = wddrives[wdunit(dev)];
|
|
|
|
switch (fmt) {
|
|
case S_IFCHR:
|
|
du->dk_copenpart &= ~mask;
|
|
break;
|
|
case S_IFBLK:
|
|
du->dk_bopenpart &= ~mask;
|
|
break;
|
|
}
|
|
du->dk_openpart = du->dk_copenpart | du->dk_bopenpart;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
wdioctl(dev_t dev, int cmd, caddr_t addr, int flag)
|
|
{
|
|
int lunit = wdunit(dev);
|
|
register struct disk *du;
|
|
int error = 0;
|
|
#ifdef notyet
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
#endif
|
|
|
|
du = wddrives[lunit];
|
|
|
|
switch (cmd) {
|
|
|
|
case DIOCSBAD:
|
|
if ((flag & FWRITE) == 0)
|
|
error = EBADF;
|
|
else
|
|
du->dk_bad = *(struct dkbad *)addr;
|
|
break;
|
|
|
|
case DIOCGDINFO:
|
|
*(struct disklabel *)addr = du->dk_dd;
|
|
break;
|
|
|
|
case DIOCGPART:
|
|
if (wddospart(dev))
|
|
return (EINVAL);
|
|
((struct partinfo *)addr)->disklab = &du->dk_dd;
|
|
((struct partinfo *)addr)->part =
|
|
&du->dk_dd.d_partitions[wdpart(dev)];
|
|
break;
|
|
|
|
case DIOCSDINFO:
|
|
if ((flag & FWRITE) == 0)
|
|
error = EBADF;
|
|
else
|
|
error = setdisklabel(&du->dk_dd,
|
|
(struct disklabel *)addr,
|
|
#if 0
|
|
/*
|
|
* XXX setdisklabel() uses the
|
|
* openmask to allow it to reject
|
|
* changing open partitions. Why
|
|
* are we pretending nothing is
|
|
* open?
|
|
*/
|
|
du->dk_flags & DKFL_BSDLABEL
|
|
? du->dk_openpart :
|
|
#endif
|
|
0,
|
|
du->dk_dospartitions);
|
|
if (error == 0) {
|
|
du->dk_flags |= DKFL_BSDLABEL;
|
|
wdwsetctlr(du); /* XXX - check */
|
|
}
|
|
break;
|
|
|
|
case DIOCWLABEL:
|
|
du->dk_flags &= ~DKFL_WRITEPROT;
|
|
if ((flag & FWRITE) == 0)
|
|
error = EBADF;
|
|
else
|
|
du->dk_wlabel = *(int *)addr;
|
|
break;
|
|
|
|
case DIOCWDINFO:
|
|
du->dk_flags &= ~DKFL_WRITEPROT;
|
|
if ((flag & FWRITE) == 0)
|
|
error = EBADF;
|
|
else if ((error = setdisklabel(&du->dk_dd,
|
|
(struct disklabel *)addr,
|
|
#if 0
|
|
du->dk_flags & DKFL_BSDLABEL
|
|
? du->dk_openpart :
|
|
#endif
|
|
0,
|
|
du->dk_dospartitions)) == 0) {
|
|
int wlab;
|
|
|
|
du->dk_flags |= DKFL_BSDLABEL;
|
|
wdwsetctlr(du); /* XXX - check */
|
|
|
|
/* simulate opening partition 0 so write succeeds */
|
|
du->dk_openpart |= (1 << 0); /* XXX */
|
|
wlab = du->dk_wlabel;
|
|
du->dk_wlabel = 1;
|
|
error = writedisklabel(dev, (d_strategy_t *) WDSTRATEGY,
|
|
&du->dk_dd, du->dk_dospartitions);
|
|
du->dk_openpart = du->dk_copenpart | du->dk_bopenpart;
|
|
du->dk_wlabel = wlab;
|
|
}
|
|
break;
|
|
|
|
#ifdef notyet
|
|
case DIOCGDINFOP:
|
|
*(struct disklabel **)addr = &(du->dk_dd);
|
|
break;
|
|
|
|
case DIOCWFORMAT:
|
|
if ((flag & FWRITE) == 0)
|
|
error = EBADF;
|
|
else {
|
|
register struct format_op *fop;
|
|
|
|
fop = (struct format_op *)addr;
|
|
aiov.iov_base = fop->df_buf;
|
|
aiov.iov_len = fop->df_count;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_resid = fop->df_count;
|
|
auio.uio_segflg = 0;
|
|
auio.uio_offset =
|
|
fop->df_startblk * du->dk_dd.d_secsize;
|
|
#error /* XXX the 386BSD interface is different */
|
|
error = physio(wdformat, &rwdbuf[lunit], 0, dev,
|
|
B_WRITE, minphys, &auio);
|
|
fop->df_count -= auio.uio_resid;
|
|
fop->df_reg[0] = du->dk_status;
|
|
fop->df_reg[1] = du->dk_error;
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
error = ENOTTY;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#ifdef B_FORMAT
|
|
int
|
|
wdformat(struct buf *bp)
|
|
{
|
|
|
|
bp->b_flags |= B_FORMAT;
|
|
return (wdstrategy(bp));
|
|
}
|
|
#endif
|
|
|
|
int
|
|
wdsize(dev_t dev)
|
|
{
|
|
int lunit = wdunit(dev), part = wdpart(dev), val;
|
|
struct disk *du;
|
|
|
|
if (lunit >= NWD || wddospart(dev) || (du = wddrives[lunit]) == NULL)
|
|
return (-1);
|
|
val = 0;
|
|
if (du->dk_state == CLOSED)
|
|
val = wdopen(makewddev(major(dev), lunit, WDRAW),
|
|
FREAD, S_IFBLK, 0);
|
|
if (val != 0 || du->dk_flags & DKFL_WRITEPROT)
|
|
return (-1);
|
|
return ((int)du->dk_dd.d_partitions[part].p_size);
|
|
}
|
|
|
|
extern char *vmmap; /* poor name! */
|
|
|
|
/*
|
|
* Dump core after a system crash.
|
|
*/
|
|
int
|
|
wddump(dev_t dev)
|
|
{
|
|
register struct disk *du;
|
|
register struct bt_bad *bt_ptr;
|
|
struct disklabel *lp;
|
|
long num; /* number of sectors to write */
|
|
int lunit, part;
|
|
long blkoff, blknum;
|
|
long blkchk, blkcnt, blknext;
|
|
long cylin, head, sector;
|
|
long secpertrk, secpercyl, nblocks;
|
|
char *addr;
|
|
extern int Maxmem;
|
|
static int wddoingadump = 0;
|
|
extern caddr_t CADDR1;
|
|
|
|
/* Toss any characters present prior to dump. */
|
|
while (sgetc(1))
|
|
;
|
|
|
|
/* Check for acceptable device. */
|
|
/* XXX should reset to maybe allow du->dk_state < OPEN. */
|
|
lunit = wdunit(dev); /* eventually support floppies? */
|
|
part = wdpart(dev);
|
|
if (lunit >= NWD || wddospart(dev) || (du = wddrives[lunit]) == NULL
|
|
|| du->dk_state < OPEN || du->dk_flags & DKFL_WRITEPROT)
|
|
return (ENXIO);
|
|
|
|
/* Size of memory to dump, in disk sectors. */
|
|
num = (u_long)Maxmem * NBPG / du->dk_dd.d_secsize;
|
|
|
|
secpertrk = du->dk_dd.d_nsectors;
|
|
secpercyl = du->dk_dd.d_secpercyl;
|
|
nblocks = du->dk_dd.d_partitions[part].p_size;
|
|
blkoff = du->dk_dd.d_partitions[part].p_offset;
|
|
|
|
#if 0
|
|
pg("part %x, nblocks %d, dumplo %d num %d\n",
|
|
part, nblocks, dumplo, num);
|
|
#endif
|
|
|
|
/* Check transfer bounds against partition size. */
|
|
if (dumplo < 0 || dumplo + num > nblocks)
|
|
return (EINVAL);
|
|
|
|
/* Check if we are being called recursively. */
|
|
if (wddoingadump)
|
|
return (EFAULT);
|
|
|
|
#if 0
|
|
/* Mark controller active for if we panic during the dump. */
|
|
wdtab[du->dk_ctrlr].b_active = 1;
|
|
#endif
|
|
wddoingadump = 1;
|
|
|
|
/* Recalibrate the drive. */
|
|
DELAY(5); /* ATA spec XXX NOT */
|
|
if (wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) != 0
|
|
|| wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) != 0
|
|
|| wdsetctlr(du) != 0) {
|
|
wderror((struct buf *)NULL, du, "wddump: recalibrate failed");
|
|
return (EIO);
|
|
}
|
|
|
|
du->dk_flags |= DKFL_SINGLE;
|
|
addr = (char *) 0;
|
|
blknum = dumplo + blkoff;
|
|
while (num > 0) {
|
|
blkcnt = num;
|
|
if (blkcnt > MAXTRANSFER)
|
|
blkcnt = MAXTRANSFER;
|
|
/* Keep transfer within current cylinder. */
|
|
if ((blknum + blkcnt - 1) / secpercyl != blknum / secpercyl)
|
|
blkcnt = secpercyl - (blknum % secpercyl);
|
|
blknext = blknum + blkcnt;
|
|
|
|
/*
|
|
* See if one of the sectors is in the bad sector list
|
|
* (if we have one). If the first sector is bad, then
|
|
* reduce the transfer to this one bad sector; if another
|
|
* sector is bad, then reduce reduce the transfer to
|
|
* avoid any bad sectors.
|
|
*/
|
|
if ((du->dk_flags & (DKFL_SINGLE | DKFL_BADSECT))
|
|
== (DKFL_SINGLE | DKFL_BADSECT))
|
|
for (blkchk = blknum; blkchk < blknum + blkcnt; blkchk++) {
|
|
cylin = blkchk / secpercyl;
|
|
head = (blkchk % secpercyl) / secpertrk;
|
|
sector = blkchk % secpertrk;
|
|
for (bt_ptr = du->dk_bad.bt_bad;
|
|
bt_ptr->bt_cyl != BAD144_NO_CYL; bt_ptr++) {
|
|
if (bt_ptr->bt_cyl > cylin)
|
|
/*
|
|
* Sorted list, and we passed our cylinder.
|
|
* quit.
|
|
*/
|
|
break;
|
|
if (bt_ptr->bt_cyl == cylin &&
|
|
bt_ptr->bt_trksec == (head << 8) + sector) {
|
|
/* Found bad block. */
|
|
blkcnt = blkchk - blknum;
|
|
if (blkcnt > 0) {
|
|
blknext = blknum + blkcnt;
|
|
goto out;
|
|
}
|
|
blkcnt = 1;
|
|
blknext = blknum + blkcnt;
|
|
/*
|
|
* Found bad block. Calculate new block number.
|
|
* This starts at the end of the disk (skip the
|
|
* last track which is used for the bad block list),
|
|
* and works backwards to the front of the disk.
|
|
*/
|
|
/* XXX as usual. */
|
|
#ifdef WDDEBUG
|
|
printf("--- badblock code -> Old = %ld; ",
|
|
blknum);
|
|
#endif
|
|
lp = &du->dk_dd;
|
|
if (lp->d_partitions[BSD_PART].p_offset != 0)
|
|
blknum = lp->d_partitions[BAD144_PART]
|
|
.p_offset
|
|
+ lp->d_partitions[BAD144_PART]
|
|
.p_size;
|
|
else
|
|
blknum = lp->d_secperunit;
|
|
blknum -= lp->d_nsectors
|
|
+ (bt_ptr - du->dk_bad.bt_bad) + 1;
|
|
#ifdef WDDEBUG
|
|
printf("new = %ld\n", blknum);
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
out:
|
|
|
|
/* Compute disk address. */
|
|
cylin = blknum / secpercyl;
|
|
head = (blknum % secpercyl) / secpertrk;
|
|
sector = blknum % secpertrk;
|
|
|
|
#if 0
|
|
/* Let's just talk about this first... */
|
|
pg("cylin l%d head %ld sector %ld addr 0x%x count %ld",
|
|
cylin, head, sector, addr, blkcnt);
|
|
#endif
|
|
|
|
/* Do the write. */
|
|
if (wdcommand(du, cylin, head, sector, blkcnt, WDCC_WRITE)
|
|
!= 0) {
|
|
wderror((struct buf *)NULL, du,
|
|
"wddump: timeout waiting to to give command");
|
|
return (EIO);
|
|
}
|
|
while (blkcnt != 0) {
|
|
pmap_enter(kernel_pmap, CADDR1, trunc_page(addr),
|
|
VM_PROT_READ, TRUE);
|
|
|
|
/* Ready to send data? */
|
|
DELAY(5); /* ATA spec */
|
|
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT)
|
|
< 0) {
|
|
wderror((struct buf *)NULL, du,
|
|
"wddump: timeout waiting for DRQ");
|
|
return (EIO);
|
|
}
|
|
outsw(du->dk_port + wd_data,
|
|
CADDR1 + ((int)addr & (NBPG - 1)),
|
|
DEV_BSIZE / sizeof(short));
|
|
addr += DEV_BSIZE;
|
|
if ((unsigned)addr % (1024 * 1024) == 0)
|
|
printf("%ld ", num / (1024 * 1024 / DEV_BSIZE));
|
|
num--;
|
|
blkcnt--;
|
|
}
|
|
|
|
/* Wait for completion. */
|
|
DELAY(5); /* ATA spec XXX NOT */
|
|
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) < 0) {
|
|
wderror((struct buf *)NULL, du,
|
|
"wddump: timeout waiting for status");
|
|
return (EIO);
|
|
}
|
|
|
|
/* Check final status. */
|
|
if (du->dk_status
|
|
& (WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ | WDCS_ERR)
|
|
!= (WDCS_READY | WDCS_SEEKCMPLT)) {
|
|
wderror((struct buf *)NULL, du,
|
|
"wddump: extra DRQ, or error");
|
|
return (EIO);
|
|
}
|
|
|
|
/* Update block count. */
|
|
blknum = blknext;
|
|
|
|
/* Operator aborting dump? */
|
|
if (sgetc(1) & 0xff) /* EWS: A hack to work with syscons */
|
|
return (EINTR);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
wderror(struct buf *bp, struct disk *du, char *mesg)
|
|
{
|
|
if (bp == NULL)
|
|
printf("wd%d: %s:\n", du->dk_lunit, mesg);
|
|
else
|
|
diskerr(bp, "wd", mesg, LOG_PRINTF, du->dk_skip, &du->dk_dd);
|
|
printf("wd%d: status %b error %b\n", du->dk_lunit,
|
|
du->dk_status, WDCS_BITS, du->dk_error, WDERR_BITS);
|
|
}
|
|
|
|
/*
|
|
* Discard any interrupts that were latched by the interrupt system while
|
|
* we were doing polled i/o.
|
|
*/
|
|
static void
|
|
wdflushirq(struct disk *du, int old_ipl)
|
|
{
|
|
wdtab[du->dk_ctrlr].b_active = 2;
|
|
splx(old_ipl);
|
|
(void)splbio();
|
|
wdtab[du->dk_ctrlr].b_active = 0;
|
|
}
|
|
|
|
/*
|
|
* Reset the controller.
|
|
*/
|
|
static int
|
|
wdreset(struct disk *du)
|
|
{
|
|
int wdc;
|
|
|
|
wdc = du->dk_port;
|
|
(void)wdwait(du, 0, TIMEOUT);
|
|
outb(wdc + wd_ctlr, WDCTL_IDS | WDCTL_RST);
|
|
DELAY(10 * 1000);
|
|
outb(wdc + wd_ctlr, WDCTL_IDS);
|
|
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) != 0
|
|
|| (du->dk_error = inb(wdc + wd_error)) != 0x01)
|
|
return (1);
|
|
outb(wdc + wd_ctlr, WDCTL_4BIT);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Sleep until driver is inactive.
|
|
* This is used only for avoiding rare race conditions, so it is unimportant
|
|
* that the sleep may be far too short or too long.
|
|
*/
|
|
static void
|
|
wdsleep(int ctrlr, char *wmesg)
|
|
{
|
|
while (wdtab[ctrlr].b_active)
|
|
tsleep((caddr_t)&wdtab[ctrlr].b_active, PZERO - 1, wmesg, 1);
|
|
}
|
|
|
|
static void
|
|
wdtimeout(caddr_t cdu, int ticks)
|
|
{
|
|
struct disk *du;
|
|
int x;
|
|
|
|
du = (struct disk *)cdu;
|
|
x = splbio();
|
|
if (du->dk_timeout != 0 && --du->dk_timeout == 0) {
|
|
wderror((struct buf *)NULL, du, "interrupt timeout");
|
|
wdunwedge(du);
|
|
wdflushirq(du, x);
|
|
du->dk_skip = 0;
|
|
du->dk_flags |= DKFL_SINGLE;
|
|
wdstart(du->dk_ctrlr);
|
|
}
|
|
timeout(wdtimeout, cdu, hz);
|
|
splx(x);
|
|
}
|
|
|
|
/*
|
|
* Reset the controller after it has become wedged. This is different from
|
|
* wdreset() so that wdreset() can be used in the probe and so that this
|
|
* can restore the geometry .
|
|
*/
|
|
static int
|
|
wdunwedge(struct disk *du)
|
|
{
|
|
struct disk *du1;
|
|
int lunit;
|
|
|
|
/* Schedule other drives for recalibration. */
|
|
for (lunit = 0; lunit < NWD; lunit++)
|
|
if ((du1 = wddrives[lunit]) != NULL && du1 != du
|
|
&& du1->dk_ctrlr == du->dk_ctrlr
|
|
&& du1->dk_state > WANTOPEN)
|
|
du1->dk_state = WANTOPEN;
|
|
|
|
DELAY(RECOVERYTIME);
|
|
if (wdreset(du) == 0) {
|
|
/*
|
|
* XXX - recalibrate current drive now because some callers
|
|
* aren't prepared to have its state change.
|
|
*/
|
|
if (wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) == 0
|
|
&& wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) == 0
|
|
&& wdsetctlr(du) == 0)
|
|
return (0);
|
|
}
|
|
wderror((struct buf *)NULL, du, "wdunwedge failed");
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Wait uninterruptibly until controller is not busy and either certain
|
|
* status bits are set or an error has occurred.
|
|
* The wait is usually short unless it is for the controller to process
|
|
* an entire critical command.
|
|
* Return 1 for (possibly stale) controller errors, -1 for timeout errors,
|
|
* or 0 for no errors.
|
|
* Return controller status in du->dk_status and, if there was a controller
|
|
* error, return the error code in du->dk_error.
|
|
*/
|
|
#ifdef WD_COUNT_RETRIES
|
|
static int min_retries[NWDC];
|
|
#endif
|
|
|
|
static int
|
|
wdwait(struct disk *du, u_char bits_wanted, int timeout)
|
|
{
|
|
int wdc;
|
|
u_char status;
|
|
|
|
#define POLLING 1000
|
|
|
|
wdc = du->dk_port;
|
|
timeout += POLLING;
|
|
do {
|
|
#ifdef WD_COUNT_RETRIES
|
|
if (min_retries[du->dk_ctrlr] > timeout
|
|
|| min_retries[du->dk_ctrlr] == 0)
|
|
min_retries[du->dk_ctrlr] = timeout;
|
|
#endif
|
|
DELAY(5); /* ATA spec XXX NOT */
|
|
du->dk_status = status = inb(wdc + wd_status);
|
|
if (!(status & WDCS_BUSY)) {
|
|
if (status & WDCS_ERR) {
|
|
du->dk_error = inb(wdc + wd_error);
|
|
/*
|
|
* We once returned here. This is wrong
|
|
* because the error bit is apparently only
|
|
* valid after the controller has interrupted
|
|
* (e.g., the error bit is stale when we wait
|
|
* for DRQ for writes). So we can't depend
|
|
* on the error bit at all when polling for
|
|
* command completion.
|
|
*/
|
|
}
|
|
if ((status & bits_wanted) == bits_wanted)
|
|
return (status & WDCS_ERR);
|
|
}
|
|
if (timeout < TIMEOUT)
|
|
/*
|
|
* Switch to a polling rate of about 1 KHz so that
|
|
* the timeout is almost machine-independent. The
|
|
* controller is taking a long time to respond, so
|
|
* an extra msec won't matter.
|
|
*/
|
|
DELAY(1000);
|
|
} while (--timeout != 0);
|
|
return (-1);
|
|
}
|
|
|
|
#endif /* NWDC > 0 */
|