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a8e9d1d5b7
have needed to do this in order for the wd driver to work for them.
1510 lines
40 KiB
C
1510 lines
40 KiB
C
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: @(#)wx.c 7.2 (Berkeley) 5/9/91
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* $Id: wd.c,v 1.21 1994/01/08 00:00:52 nate Exp $
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*/
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/* TODO:peel out buffer at low ipl, speed improvement */
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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/icu.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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#ifndef WDCTIMEOUT
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#define WDCTIMEOUT 10000000 /* arbitrary timeout for drive ready waits */
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#endif
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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 32 /* max size of transfer in page clusters */
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#define wdnoreloc(dev) (minor(dev) & 0x80) /* ignore partition table */
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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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#define b_cylin b_resid /* cylinder number for doing IO to */
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/* shares an entry in the buf struct */
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#define id_physid id_scsiid /* this biotab field doubles as a field */
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/* for the physical unit number on the controller */
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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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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 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 int wdreset(struct disk *du);
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static void wdsleep(int ctrlr, char *wmesg);
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static int wdunwedge(struct disk *du);
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static int wdwait(struct disk *du, u_char bits_wanted);
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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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int u;
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struct disk *du;
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int wdc;
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if (unit >= NWDC) /* 31 Jul 92*/
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return(0);
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du = malloc (sizeof(struct disk), M_TEMP, M_NOWAIT);
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bzero (du, sizeof(struct disk)); /* 31 Jul 92*/
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du->dk_ctrlr = dvp->id_unit;
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du->dk_unit = 0;
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du->dk_lunit = 0;
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wdc = du->dk_port = dvp->id_iobase;
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/* check if we have registers that work */
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outb(wdc+wd_cyl_lo, 0xa5) ; /* wd_cyl_lo is read/write */
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if(inb(wdc+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) != 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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printf("wdc%d:", dvp->id_unit);
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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 = wddrives[lunit] = (struct disk *)
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malloc (sizeof(struct disk), M_TEMP, M_NOWAIT);
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bzero (du, sizeof(struct disk));
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bzero (&wdutab[lunit], sizeof(struct buf));
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#ifdef notyet
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bzero (&rwdbuf[lunit], sizeof(struct buf));
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#endif
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wdxfer[lunit] = 0;
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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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/* print out description of drive, suppressing multiple blanks*/
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if (wdgetctlr(du) == 0) {
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int i, blank;
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printf(" [%d: wd%d: ", unit, lunit);
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for (i = blank = 0 ; i < sizeof(du->dk_params.wdp_model); i++) {
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char c = du->dk_params.wdp_model[i];
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if (blank && c == ' ')
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continue;
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if (blank && c != ' ') {
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printf(" %c", c);
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blank = 0;
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continue;
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}
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if (c == ' ')
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blank = 1;
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else
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printf("%c", c);
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}
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printf("]");
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}
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else {
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free(du, M_TEMP);
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wddrives[unit] = 0;
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printf(" [%d: wd%d: not found]", unit, lunit);
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}
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}
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printf("\n");
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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; /* Disk unit to do the IO. */
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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]) == 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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/* "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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/* have partitions and want to use them? */
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if ((du->dk_flags & DKFL_BSDLABEL) != 0 && wdpart(bp->b_dev) != WDRAW) {
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/*
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* do bounds checking, adjust transfer. if error, process.
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* if end of partition, just return
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*/
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if (bounds_check_with_label(bp, &du->dk_dd, du->dk_wlabel) <= 0)
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goto done;
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/* otherwise, process transfer request */
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}
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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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/* 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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/* 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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/* 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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* 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.
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* 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; /* disk unit for IO */
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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, addr;
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int lunit, wdc;
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loop:
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/* is there a drive for the controller to do a transfer with? */
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dp = wdtab[ctrlr].b_actf;
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if (dp == NULL)
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return;
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/* is there a transfer to this drive? */
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/* If so, link it on the controller's queue */
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bp = dp->b_actf;
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if (bp == NULL) {
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wdtab[ctrlr].b_actf = dp->b_forw;
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goto loop;
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}
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/* obtain controller and drive information */
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lunit = wdunit(bp->b_dev);
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du = wddrives[lunit];
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wdc = du->dk_port;
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/* if not really a transfer, do control operations specially */
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if (du->dk_state < OPEN) {
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if (du->dk_state != WANTOPEN)
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printf("wd%d: wdstart: weird dk_state %d\n",
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du->dk_lunit, du->dk_state);
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if (wdcontrol(bp) != 0)
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printf("wd%d: wdstart: wdcontrol returned nonzero, state = %d\n",
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du->dk_lunit, du->dk_state);
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return;
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}
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/* calculate transfer details */
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blknum = bp->b_blkno + du->dk_skip;
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#ifdef WDDEBUG
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if (du->dk_skip == 0)
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printf("wd%d: wdstart: %s %d@%d; map ", lunit,
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(bp->b_flags & B_READ) ? "read" : "write",
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bp->b_bcount, blknum);
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else
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printf(" %d)%x", du->dk_skip, inb(wdc+wd_altsts));
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#endif
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addr = (int) bp->b_un.b_addr;
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if (du->dk_skip == 0)
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du->dk_bc = bp->b_bcount;
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lp = &du->dk_dd;
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secpertrk = lp->d_nsectors;
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secpercyl = lp->d_secpercyl;
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if ((du->dk_flags & DKFL_BSDLABEL) != 0 && wdpart(bp->b_dev) != WDRAW)
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blknum += lp->d_partitions[wdpart(bp->b_dev)].p_offset;
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cylin = blknum / secpercyl;
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head = (blknum % secpercyl) / secpertrk;
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sector = blknum % secpertrk;
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/*
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* See if the current block is in the bad block list.
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* (If we have one, and not formatting.)
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*/
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if ((du->dk_flags & (DKFL_SINGLE|DKFL_BADSECT)) /* 19 Aug 92*/
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== (DKFL_SINGLE|DKFL_BADSECT))
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for (bt_ptr = du->dk_bad.bt_bad; bt_ptr->bt_cyl != 0xffff;
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bt_ptr++) {
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if (bt_ptr->bt_cyl > cylin)
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/* Sorted list, and we passed our cylinder. quit. */
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break;
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if (bt_ptr->bt_cyl == cylin &&
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bt_ptr->bt_trksec == (head << 8) + sector) {
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/*
|
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* Found bad block. Calculate new block addr.
|
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* This starts at the end of the disk (skip the
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* last track which is used for the bad block list),
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* and works backwards to the front of the disk.
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*/
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#ifdef WDDEBUG
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printf("--- badblock code -> Old = %d; ", blknum);
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#endif
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|
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/*
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* XXX the offset of the bad sector table ought
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* to be stored in the in-core copy of the table.
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*/
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#define BAD144_PART 2 /* XXX scattered magic numbers */
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#define BSD_PART 0 /* XXX should be 2 but bad144.c uses 0 */
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if (lp->d_partitions[BSD_PART].p_offset != 0)
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blknum = lp->d_partitions[BAD144_PART].p_offset
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+ lp->d_partitions[BAD144_PART].p_size;
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else
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blknum = lp->d_secperunit;
|
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blknum -= lp->d_nsectors + (bt_ptr - du->dk_bad.bt_bad)
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+ 1;
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|
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cylin = blknum / secpercyl;
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head = (blknum % secpercyl) / secpertrk;
|
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sector = blknum % secpertrk;
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|
#ifdef WDDEBUG
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printf("new = %d\n", blknum);
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#endif
|
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break;
|
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}
|
|
}
|
|
|
|
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)) {
|
|
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 send command");
|
|
wdunwedge(du);
|
|
}
|
|
#ifdef WDDEBUG
|
|
printf("sector %d cylin %d head %d addr %x sts %x\n",
|
|
sector, cylin, head, addr, inb(wdc+wd_altsts));
|
|
#endif
|
|
}
|
|
|
|
/* if this is a read operation, just go away until it's done. */
|
|
if (bp->b_flags & B_READ) return;
|
|
|
|
/* ready to send data? */
|
|
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ) != 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 (wdc + wd_data, (caddr_t)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;
|
|
int wdc;
|
|
|
|
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)];
|
|
wdc = du->dk_port;
|
|
|
|
if (wdwait(du, 0) < 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; /* 17 Sep 92*/
|
|
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; /* 17 Sep 92*/
|
|
bp->b_flags |= B_ERROR; /* flag the error */
|
|
}
|
|
} else
|
|
wderror(bp, du, "soft ecc");
|
|
}
|
|
|
|
/*
|
|
* If this was a successful read operation, fetch the data.
|
|
*/
|
|
if (((bp->b_flags & (B_READ | B_ERROR)) == B_READ) && wdtab[unit].b_active) {
|
|
int chk, dummy;
|
|
|
|
chk = min(DEV_BSIZE / sizeof(short), du->dk_bc / sizeof(short));
|
|
|
|
/* ready to receive data? */
|
|
if ((du->dk_status & (WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ))
|
|
!= (WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ))
|
|
wderror(bp, du, "wdintr: read intr arrived early");
|
|
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ) != 0) {
|
|
wderror(bp, du, "wdintr: read error detected late");
|
|
goto oops;
|
|
}
|
|
|
|
/* suck in data */
|
|
insw (wdc+wd_data,
|
|
(caddr_t)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE, chk);
|
|
du->dk_bc -= chk * sizeof(short);
|
|
|
|
/* for obselete fractional sector reads */
|
|
while (chk++ < 256) insw (wdc + wd_data, (caddr_t)&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;
|
|
du->dk_skip = 0;
|
|
dp->b_active = 0;
|
|
dp->b_actf = bp->av_forw;
|
|
dp->b_errcnt = 0;
|
|
bp->b_resid = 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;
|
|
|
|
lunit = wdunit(dev);
|
|
if (lunit >= NWD) return (ENXIO) ;
|
|
|
|
du = wddrives[lunit];
|
|
if (du == 0) return (ENXIO) ;
|
|
|
|
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;
|
|
#define WDSTRATEGY ((void (*)(struct buf *)) wdstrategy) /* XXX */
|
|
msg = readdisklabel(makewddev(major(dev), lunit, WDRAW),
|
|
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 {
|
|
du->dk_flags |= DKFL_BSDLABEL;
|
|
du->dk_flags &= ~DKFL_WRITEPROT;
|
|
if (du->dk_dd.d_flags & D_BADSECT)
|
|
du->dk_flags |= DKFL_BADSECT;
|
|
}
|
|
|
|
/* 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 != RAWPART*/ && part != WDRAW) {
|
|
int start, end;
|
|
|
|
pp = &du->dk_dd.d_partitions[part];
|
|
start = pp->p_offset;
|
|
end = pp->p_offset + pp->p_size;
|
|
for (pp = du->dk_dd.d_partitions;
|
|
pp < &du->dk_dd.d_partitions[du->dk_dd.d_npartitions];
|
|
pp++) {
|
|
if (pp->p_offset + pp->p_size <= start ||
|
|
pp->p_offset >= end)
|
|
continue;
|
|
if (pp - du->dk_dd.d_partitions == WDRAW)
|
|
continue;
|
|
if (du->dk_openpart & (1 << (pp -
|
|
du->dk_dd.d_partitions)))
|
|
log(LOG_WARNING,
|
|
"wd%d%c: overlaps open partition (%c)\n",
|
|
lunit, part + 'a',
|
|
pp - du->dk_dd.d_partitions + 'a');
|
|
}
|
|
}
|
|
if (part >= du->dk_dd.d_npartitions && part != WDRAW)
|
|
return (ENXIO);
|
|
|
|
/* insure only one open at a time */
|
|
du->dk_openpart |= mask;
|
|
switch (fmt) {
|
|
case S_IFCHR:
|
|
du->dk_copenpart |= mask;
|
|
break;
|
|
case S_IFBLK:
|
|
du->dk_bopenpart |= mask;
|
|
break;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Implement operations other than read/write.
|
|
* Called from wdstart or wdintr during opens and formats.
|
|
* Uses finite-state-machine to track progress of operation in progress.
|
|
* Returns 0 if operation still in progress, 1 if completed.
|
|
*/
|
|
static int
|
|
wdcontrol(register struct buf *bp)
|
|
{
|
|
register struct disk *du;
|
|
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);
|
|
if (++wdtab[ctrlr].b_errcnt < RETRIES) {
|
|
du->dk_state = WANTOPEN;
|
|
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) < 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 & 0x0f));
|
|
DELAY(10); /* XXX give drive time to see change */
|
|
if((command != WDCC_DIAGNOSE) && (command != WDCC_IDC)) {
|
|
if (wdwait(du, WDCS_READY) < 0) {
|
|
return(1);
|
|
}
|
|
}
|
|
else {
|
|
if (wdwait(du, 0) < 0) {
|
|
return(1);
|
|
}
|
|
}
|
|
outb(wdc + wd_sector, sector + 1);
|
|
outb(wdc + wd_seccnt, count);
|
|
outb(du->dk_port + 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 (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) != 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);
|
|
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) != 0) {
|
|
|
|
#ifndef MFM
|
|
/* Old drives don't support WDCC_READP. Try a seek to 0. */
|
|
if (wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) != 0
|
|
|| wdwait(du, WDCS_READY | WDCS_SEEKCMPLT) != 0)
|
|
return (1);
|
|
#else /* IDE */
|
|
/*
|
|
* Some IDE drives return trash if there is not a unit 1
|
|
* out there, need to make sure that it is READY and not BUSY
|
|
* before you assume it is there !
|
|
*/
|
|
outb(du->dk_port+wd_sdh, WDSD_IBM | (du->dk_unit<<4));
|
|
DELAY(5000);
|
|
if ((inb(du->dk_port+wd_status) & (WDCS_READY|WDCS_BUSY)) !=
|
|
WDCS_READY) {
|
|
return (1);
|
|
}
|
|
#endif /* MFM */
|
|
|
|
/* Fake minimal drive geometry for reading the MBR or label. */
|
|
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;
|
|
|
|
/*
|
|
* 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 Type",
|
|
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);
|
|
}
|
|
#ifdef WDDEBUG
|
|
printf(
|
|
"\nwdgetctlr wd(%d,%d): 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;
|
|
/* 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;
|
|
|
|
du = wddrives[wdunit(dev)];
|
|
|
|
/* insure only one open at a time */
|
|
du->dk_openpart &= ~mask;
|
|
switch (fmt) {
|
|
case S_IFCHR:
|
|
du->dk_copenpart &= ~mask;
|
|
break;
|
|
case S_IFBLK:
|
|
du->dk_bopenpart &= ~mask;
|
|
break;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
int
|
|
wdioctl(dev_t dev, int cmd, caddr_t addr, int flag)
|
|
{
|
|
int lunit = wdunit(dev);
|
|
register struct disk *du;
|
|
int error = 0;
|
|
#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:
|
|
((struct partinfo *)addr)->disklab = &du->dk_dd;
|
|
((struct partinfo *)addr)->part =
|
|
&du->dk_dd.d_partitions[wdpart(dev)];
|
|
break;
|
|
|
|
case DIOCSDINFO:
|
|
if ((flag & FWRITE) == 0)
|
|
error = EBADF;
|
|
else
|
|
error = setdisklabel(&du->dk_dd,
|
|
(struct disklabel *)addr,
|
|
/* du->dk_flags & DKFL_BSDLABEL) ? du->dk_openpart : */0,
|
|
du->dk_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,
|
|
/*du->dk_flags & DKFL_BSDLABEL) ? du->dk_openpart :*/ 0,
|
|
du->dk_dospartitions)) == 0) {
|
|
int wlab;
|
|
|
|
du->dk_flags |= DKFL_BSDLABEL;
|
|
wdwsetctlr(du); /* XXX - check */
|
|
|
|
/* simulate opening partition 0 so write succeeds */
|
|
du->dk_openpart |= (1 << 0); /* XXX */
|
|
wlab = du->dk_wlabel;
|
|
du->dk_wlabel = 1;
|
|
error = writedisklabel(dev, WDSTRATEGY,
|
|
&du->dk_dd, du->dk_dospartitions);
|
|
du->dk_openpart = du->dk_copenpart | du->dk_bopenpart;
|
|
du->dk_wlabel = wlab;
|
|
}
|
|
break;
|
|
|
|
#ifdef notyet
|
|
case DIOCGDINFOP:
|
|
*(struct disklabel **)addr = &(du->dk_dd);
|
|
break;
|
|
|
|
case DIOCWFORMAT:
|
|
if ((flag & FWRITE) == 0)
|
|
error = EBADF;
|
|
else {
|
|
register struct format_op *fop;
|
|
|
|
fop = (struct format_op *)addr;
|
|
aiov.iov_base = fop->df_buf;
|
|
aiov.iov_len = fop->df_count;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_resid = fop->df_count;
|
|
auio.uio_segflg = 0;
|
|
auio.uio_offset =
|
|
fop->df_startblk * du->dk_dd.d_secsize;
|
|
error = 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) /* 31 Jul 92*/
|
|
return(-1);
|
|
|
|
du = wddrives[lunit];
|
|
val = 0;
|
|
if (du == 0 || du->dk_state == CLOSED)
|
|
val = wdopen (makewddev(major(dev), lunit, WDRAW), FREAD, S_IFBLK, 0);
|
|
if (du == 0 || val != 0 || du->dk_flags & DKFL_WRITEPROT)
|
|
return (-1);
|
|
|
|
return((int)du->dk_dd.d_partitions[part].p_size);
|
|
}
|
|
|
|
extern char *vmmap; /* poor name! */
|
|
|
|
int
|
|
wddump(dev_t dev) /* dump core after a system crash */
|
|
{
|
|
register struct disk *du; /* disk unit to do the IO */
|
|
#ifdef notyet
|
|
register struct bt_bad *bt_ptr;
|
|
#endif
|
|
long num; /* number of sectors to write */
|
|
int ctrlr, lunit, part, wdc;
|
|
long blkoff, blknum;
|
|
#ifdef notdef
|
|
long blkcnt;
|
|
#endif
|
|
long cylin, head, sector;
|
|
long secpertrk, secpercyl, nblocks, i;
|
|
char *addr;
|
|
extern int Maxmem;
|
|
static wddoingadump = 0 ;
|
|
extern caddr_t CADDR1;
|
|
|
|
addr = (char *) 0; /* starting address */
|
|
|
|
/* toss any characters present prior to dump */
|
|
while (sgetc(1))
|
|
;
|
|
|
|
/* size of memory to dump */
|
|
num = Maxmem;
|
|
lunit = wdunit(dev); /* eventually support floppies? */
|
|
part = wdpart(dev); /* file system */
|
|
/* check for acceptable drive number */
|
|
if (lunit >= NWD) return(ENXIO); /* 31 Jul 92*/
|
|
|
|
du = wddrives[lunit];
|
|
if (du == 0) return(ENXIO);
|
|
/* was it ever initialized ? */
|
|
if (du->dk_state < OPEN) return (ENXIO) ;
|
|
if (du->dk_flags & DKFL_WRITEPROT) return(ENXIO);
|
|
wdc = du->dk_port;
|
|
ctrlr = du->dk_ctrlr;
|
|
|
|
/* Convert to disk sectors */
|
|
num = (u_long) num * NBPG / du->dk_dd.d_secsize;
|
|
|
|
/* check if controller active */
|
|
/*if (wdtab[ctrlr].b_active) return(EFAULT); */
|
|
if (wddoingadump) return(EFAULT);
|
|
|
|
secpertrk = du->dk_dd.d_nsectors;
|
|
secpercyl = du->dk_dd.d_secpercyl;
|
|
nblocks = du->dk_dd.d_partitions[part].p_size;
|
|
blkoff = du->dk_dd.d_partitions[part].p_offset;
|
|
|
|
/*pg("xunit %x, nblocks %d, dumplo %d num %d\n", part,nblocks,dumplo,num);*/
|
|
/* check transfer bounds against partition size */
|
|
if ((dumplo < 0) || ((dumplo + num) > nblocks))
|
|
return(EINVAL);
|
|
|
|
#if 0
|
|
wdtab[ctrlr].b_active = 1; /* mark controller active for if we */
|
|
/* panic during the dump */
|
|
#endif
|
|
wddoingadump = 1 ;
|
|
i = 100000; /* WHY NOT TIMEOUT */
|
|
/* must delay 5us to conform to ATA spec */
|
|
DELAY(5);
|
|
while ((inb(wdc+wd_status) & WDCS_BUSY) && (i-- > 0)) ;
|
|
outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit << 4));
|
|
outb(wdc+wd_command, WDCC_RESTORE | WD_STEP);
|
|
/* must delay 5us to conform to ATA spec */
|
|
DELAY(5);
|
|
while (inb(wdc+wd_status) & WDCS_BUSY) ;
|
|
|
|
/* some compaq controllers require this ... */
|
|
wdsetctlr(du);
|
|
|
|
blknum = dumplo + blkoff;
|
|
while (num > 0) {
|
|
#ifdef notdef
|
|
if (blkcnt > MAXTRANSFER) blkcnt = MAXTRANSFER;
|
|
if ((blknum + blkcnt - 1) / secpercyl != blknum / secpercyl)
|
|
blkcnt = secpercyl - (blknum % secpercyl);
|
|
/* keep transfer within current cylinder */
|
|
#endif
|
|
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
|
|
trunc_page(addr), VM_PROT_READ, TRUE);
|
|
|
|
/* compute disk address */
|
|
cylin = blknum / secpercyl;
|
|
head = (blknum % secpercyl) / secpertrk;
|
|
sector = blknum % secpertrk;
|
|
|
|
#ifdef notyet
|
|
/*
|
|
* See if the current block is in the bad block list.
|
|
* (If we have one.)
|
|
*/
|
|
for (bt_ptr = du->dk_bad.bt_bad;
|
|
bt_ptr->bt_cyl != -1; 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 addr.
|
|
* 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 */
|
|
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 -= du->dk_dd.d_nsectors
|
|
+ (bt_ptr - du->dk_bad.bt_bad) + 1;
|
|
cylin = blknum / secpercyl;
|
|
head = (blknum % secpercyl) / secpertrk;
|
|
sector = blknum % secpertrk;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
sector++; /* origin 1 */
|
|
|
|
/* select drive. */
|
|
outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit<<4) | (head & 0xf));
|
|
while ((inb(wdc+wd_status) & WDCS_READY) == 0) ;
|
|
|
|
/* transfer some blocks */
|
|
outb(wdc+wd_sector, sector);
|
|
outb(wdc+wd_seccnt,1);
|
|
outb(wdc+wd_cyl_lo, cylin);
|
|
outb(wdc+wd_cyl_hi, cylin >> 8);
|
|
#ifdef notdef
|
|
/* lets just talk about this first...*/
|
|
pg ("sdh 0%o sector %d cyl %d addr 0x%x",
|
|
inb(wdc+wd_sdh), inb(wdc+wd_sector),
|
|
inb(wdc+wd_cyl_hi)*256+inb(wdc+wd_cyl_lo), addr) ;
|
|
#endif
|
|
outb(wdc+wd_command, WDCC_WRITE);
|
|
|
|
/* Ready to send data? */
|
|
while ((inb(wdc+wd_status) & WDCS_DRQ) == 0) ;
|
|
if (inb(wdc+wd_status) & WDCS_ERR) return(EIO) ;
|
|
|
|
outsw (wdc+wd_data, CADDR1+((int)addr&(NBPG-1)), 256);
|
|
|
|
if (inb(wdc+wd_status) & WDCS_ERR) return(EIO) ;
|
|
/* Check data request (should be done) */
|
|
if (inb(wdc+wd_status) & WDCS_DRQ) return(EIO) ;
|
|
|
|
/* wait for completion */
|
|
/* must delay 5us to conform to ATA spec */
|
|
DELAY(5);
|
|
for ( i = WDCTIMEOUT ; inb(wdc+wd_status) & WDCS_BUSY ; i--) {
|
|
if (i < 0) return (EIO) ;
|
|
}
|
|
/* error check the xfer */
|
|
if (inb(wdc+wd_status) & WDCS_ERR) return(EIO) ;
|
|
|
|
if ((unsigned)addr % (1024*1024) == 0) printf("%ld ", num/2048);
|
|
/* update block count */
|
|
num--;
|
|
blknum++ ;
|
|
(int) addr += 512;
|
|
|
|
/* operator aborting dump? */
|
|
if (sgetc(1))
|
|
return(EINTR);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
wderror(struct buf *bp, struct disk *du, char *mesg)
|
|
{
|
|
if (bp == NULL)
|
|
printf("wd%d: %s:", du->dk_lunit, mesg);
|
|
else
|
|
diskerr(bp, "wd", mesg, LOG_PRINTF, du->dk_skip, &du->dk_dd);
|
|
printf(" status %b error %b\n",
|
|
du->dk_status, WDCS_BITS, du->dk_error, WDERR_BITS);
|
|
}
|
|
|
|
/*
|
|
* Reset the controller.
|
|
*/
|
|
static int
|
|
wdreset(struct disk *du)
|
|
{
|
|
int wdc;
|
|
|
|
wdc = du->dk_port;
|
|
(void)wdwait(du, 0);
|
|
outb(wdc + wd_ctlr, WDCTL_IDS | WDCTL_RST);
|
|
DELAY(10 * 1000);
|
|
outb(wdc + wd_ctlr, WDCTL_IDS);
|
|
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT) != 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);
|
|
}
|
|
|
|
/*
|
|
* 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) == 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.
|
|
*/
|
|
static int min_retries[NWDC];
|
|
static int
|
|
wdwait(struct disk *du, u_char bits_wanted)
|
|
{
|
|
int retries;
|
|
int wdc;
|
|
int ctrlr = du->dk_ctrlr;
|
|
u_char status;
|
|
#define POLLING 1000
|
|
#define TIMEOUT 20000 /* WDCC_DIAGNOSE can take > 300 msec */
|
|
|
|
wdc = du->dk_port;
|
|
retries = POLLING + TIMEOUT;
|
|
do {
|
|
if (min_retries[ctrlr] > retries || min_retries[ctrlr] == 0)
|
|
min_retries[ctrlr] = retries;
|
|
/* must delay 5us to conform to ATA spec */
|
|
DELAY(5);
|
|
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 (retries < 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 (--retries != 0);
|
|
return (-1);
|
|
}
|
|
|
|
#endif /* NWDC > 0 */
|