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freebsd-nq/sys/i386/isa/wd.c
Poul-Henning Kamp 0abc78a697 Rename some local variables to avoid shadowing other local variables. 
Found by: -Wshadow
1997-11-07 09:21:01 +00:00

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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)wd.c 7.2 (Berkeley) 5/9/91
* $Id: wd.c,v 1.143 1997/11/07 08:52:45 phk Exp $
*/
/* TODO:
* o Bump error count after timeout.
* o Satisfy ATA timing in all cases.
* o Finish merging berry/sos timeout code (bump error count...).
* o Merge/fix TIH/NetBSD bad144 code.
* o Don't use polling except for initialization. Need to
* reorganize the state machine. Then "extra" interrupts
* shouldn't happen (except maybe one for initialization).
* o Fix disklabel, boot and driver inconsistencies with
* bad144 in standard versions.
* o Support extended DOS partitions.
* o Support swapping to DOS partitions.
* o Handle bad sectors, clustering, disklabelling, DOS
* partitions and swapping driver-independently. Use
* i386/dkbad.c for bad sectors. Swapping will need new
* driver entries for polled reinit and polled write).
*/
#include "wd.h"
#ifdef NWDC
#undef NWDC
#endif
#include "wdc.h"
#include "opt_wd.h"
#include "opt_atapi.h"
#if NWDC > 0
#include "pci.h"
#include <sys/param.h>
#include <sys/dkbad.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
#include <machine/bootinfo.h>
#include <machine/clock.h>
#include <machine/cons.h>
#include <machine/md_var.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/wdreg.h>
#include <sys/syslog.h>
#include <sys/dkstat.h>
#include <vm/vm.h>
#include <vm/vm_prot.h>
#include <vm/pmap.h>
#ifdef ATAPI
#include <i386/isa/atapi.h>
#endif
#ifdef CMD640
#include <i386/isa/wdc_p.h>
#endif /*CMD640*/
extern void wdstart(int ctrlr);
#define TIMEOUT 10000
#define RETRIES 5 /* number of retries before giving up */
#define RECOVERYTIME 500000 /* usec for controller to recover after err */
#define MAXTRANSFER 255 /* max size of transfer in sectors */
/* correct max is 256 but some controllers */
/* can't handle that in all cases */
#define WDOPT_32BIT 0x8000
#define WDOPT_SLEEPHACK 0x4000
#define WDOPT_DMA 0x2000
#define WDOPT_FORCEHD(x) (((x)&0x0f00)>>8)
#define WDOPT_MULTIMASK 0x00ff
/*
* This biotab field doubles as a field for the physical unit number on
* the controller.
*/
#define id_physid id_scsiid
/*
* Drive states. Used to initialize drive.
*/
#define CLOSED 0 /* disk is closed. */
#define WANTOPEN 1 /* open requested, not started */
#define RECAL 2 /* doing restore */
#define OPEN 3 /* done with open */
#define PRIMARY 0
/*
* Disk geometry. A small part of struct disklabel.
* XXX disklabel.5 contains an old clone of disklabel.h.
*/
struct diskgeom {
u_long d_secsize; /* # of bytes per sector */
u_long d_nsectors; /* # of data sectors per track */
u_long d_ntracks; /* # of tracks per cylinder */
u_long d_ncylinders; /* # of data cylinders per unit */
u_long d_secpercyl; /* # of data sectors per cylinder */
u_long d_secperunit; /* # of data sectors per unit */
u_long d_precompcyl; /* XXX always 0 */
};
/*
* The structure of a disk drive.
*/
struct disk {
long dk_bc; /* byte count left */
short dk_skip; /* blocks already transferred */
int dk_ctrlr; /* physical controller number */
#ifdef CMD640
int dk_ctrlr_cmd640;/* controller number for CMD640 quirk */
#endif
int dk_unit; /* physical unit number */
int dk_lunit; /* logical unit number */
int dk_interface; /* interface (two ctrlrs per interface) */
char dk_state; /* control state */
u_char dk_status; /* copy of status reg. */
u_char dk_error; /* copy of error reg. */
u_char dk_timeout; /* countdown to next timeout */
int dk_port; /* i/o port base */
int dk_altport; /* altstatus port base */
#ifdef DEVFS
void *dk_bdev; /* devfs token for whole disk */
void *dk_cdev; /* devfs token for raw whole disk */
#endif
u_long cfg_flags; /* configured characteristics */
short dk_flags; /* drive characteristics found */
#define DKFL_SINGLE 0x00004 /* sector at a time mode */
#define DKFL_ERROR 0x00008 /* processing a disk error */
#define DKFL_LABELLING 0x00080 /* readdisklabel() in progress */
#define DKFL_32BIT 0x00100 /* use 32-bit i/o mode */
#define DKFL_MULTI 0x00200 /* use multi-i/o mode */
#define DKFL_BADSCAN 0x00400 /* report all errors */
#define DKFL_USEDMA 0x00800 /* use DMA for data transfers */
#define DKFL_DMA 0x01000 /* using DMA on this transfer-- DKFL_SINGLE
* overrides this
*/
struct wdparams dk_params; /* ESDI/IDE drive/controller parameters */
int dk_dkunit; /* disk stats unit number */
int dk_multi; /* multi transfers */
int dk_currentiosize; /* current io size */
struct diskgeom dk_dd; /* device configuration data */
struct diskslices *dk_slices; /* virtual drives */
void *dk_dmacookie; /* handle for DMA services */
};
#define WD_COUNT_RETRIES
static int wdtest = 0;
static struct disk *wddrives[NWD]; /* table of units */
static struct buf_queue_head drive_queue[NWD]; /* head of queue per drive */
static struct {
int b_active;
} wdutab[NWD];
/*
static struct buf wdtab[NWDC];
*/
static struct {
struct buf_queue_head controller_queue;
int b_errcnt;
int b_active;
} wdtab[NWDC];
struct wddma wddma[NWDC];
#ifdef notyet
static struct buf rwdbuf[NWD]; /* buffers for raw IO */
#endif
static int wdprobe(struct isa_device *dvp);
static int wdattach(struct isa_device *dvp);
static void wdustart(struct disk *du);
static int wdcontrol(struct buf *bp);
static int wdcommand(struct disk *du, u_int cylinder, u_int head,
u_int sector, u_int count, u_int command);
static int wdsetctlr(struct disk *du);
#if 0
static int wdwsetctlr(struct disk *du);
#endif
static int wdsetmode(int mode, void *wdinfo);
static int wdgetctlr(struct disk *du);
static void wderror(struct buf *bp, struct disk *du, char *mesg);
static void wdflushirq(struct disk *du, int old_ipl);
static int wdreset(struct disk *du);
static void wdsleep(int ctrlr, char *wmesg);
static void wdstrategy1(struct buf *bp);
static timeout_t wdtimeout;
static int wdunwedge(struct disk *du);
static int wdwait(struct disk *du, u_char bits_wanted, int timeout);
struct isa_driver wdcdriver = {
wdprobe, wdattach, "wdc",
};
static d_open_t wdopen;
static d_close_t wdclose;
static d_strategy_t wdstrategy;
static d_ioctl_t wdioctl;
static d_dump_t wddump;
static d_psize_t wdsize;
#define CDEV_MAJOR 3
#define BDEV_MAJOR 0
static struct cdevsw wd_cdevsw;
static struct bdevsw wd_bdevsw =
{ wdopen, wdclose, wdstrategy, wdioctl, /*0*/
wddump, wdsize, D_DISK, "wd", &wd_cdevsw, -1 };
#ifdef CMD640
static int atapictrlr;
static int eide_quirks;
#endif
/*
* Here we use the pci-subsystem to find out, whether there is
* a cmd640b-chip attached on this pci-bus. This public routine
* will be called by wdc_p.c .
*/
#ifdef CMD640
void
wdc_pci(int quirks)
{
eide_quirks = quirks;
}
#endif
/*
* Probe for controller.
*/
static int
wdprobe(struct isa_device *dvp)
{
int unit = dvp->id_unit;
int interface;
struct disk *du;
if (unit >= NWDC)
return (0);
du = malloc(sizeof *du, M_TEMP, M_NOWAIT);
if (du == NULL)
return (0);
bzero(du, sizeof *du);
du->dk_ctrlr = dvp->id_unit;
interface = du->dk_ctrlr / 2;
du->dk_interface = interface;
#if !defined(DISABLE_PCI_IDE) && (NPCI > 0)
if (wddma[interface].wdd_candma) {
du->dk_dmacookie = wddma[interface].wdd_candma(dvp->id_iobase, du->dk_ctrlr);
du->dk_port = dvp->id_iobase;
du->dk_altport = wddma[interface].wdd_altiobase(du->dk_dmacookie);
} else {
du->dk_port = dvp->id_iobase;
du->dk_altport = du->dk_port + wd_ctlr;
}
#else
du->dk_port = dvp->id_iobase;
du->dk_altport = du->dk_port + wd_ctlr;
#endif
/* check if we have registers that work */
outb(du->dk_port + wd_sdh, WDSD_IBM); /* set unit 0 */
outb(du->dk_port + wd_cyl_lo, 0xa5); /* wd_cyl_lo is read/write */
if (inb(du->dk_port + wd_cyl_lo) == 0xff) { /* XXX too weak */
#ifdef ATAPI
/* There is no master, try the ATAPI slave. */
outb(du->dk_port + wd_sdh, WDSD_IBM | 0x10);
outb(du->dk_port + wd_cyl_lo, 0xa5);
if (inb(du->dk_port + wd_cyl_lo) == 0xff)
#endif
goto nodevice;
}
if (wdreset(du) == 0)
goto reset_ok;
#ifdef ATAPI
/* test for ATAPI signature */
outb(du->dk_port + wd_sdh, WDSD_IBM); /* master */
if (inb(du->dk_port + wd_cyl_lo) == 0x14 &&
inb(du->dk_port + wd_cyl_hi) == 0xeb)
goto reset_ok;
du->dk_unit = 1;
outb(du->dk_port + wd_sdh, WDSD_IBM | 0x10); /* slave */
if (inb(du->dk_port + wd_cyl_lo) == 0x14 &&
inb(du->dk_port + wd_cyl_hi) == 0xeb)
goto reset_ok;
#endif
DELAY(RECOVERYTIME);
if (wdreset(du) != 0) {
goto nodevice;
}
reset_ok:
/* execute a controller only command */
if (wdcommand(du, 0, 0, 0, 0, WDCC_DIAGNOSE) != 0
|| wdwait(du, 0, TIMEOUT) < 0) {
goto nodevice;
}
/*
* drive(s) did not time out during diagnostic :
* Get error status and check that both drives are OK.
* Table 9-2 of ATA specs suggests that we must check for
* a value of 0x01
*
* Strangely, some controllers will return a status of
* 0x81 (drive 0 OK, drive 1 failure), and then when
* the DRV bit is set, return status of 0x01 (OK) for
* drive 2. (This seems to contradict the ATA spec.)
*/
du->dk_error = inb(du->dk_port + wd_error);
if(du->dk_error != 0x01) {
if(du->dk_error & 0x80) { /* drive 1 failure */
/* first set the DRV bit */
u_int sdh;
sdh = inb(du->dk_port+ wd_sdh);
sdh = sdh | 0x10;
outb(du->dk_port+ wd_sdh, sdh);
/* Wait, to make sure drv 1 has completed diags */
if ( wdwait(du, 0, TIMEOUT) < 0)
goto nodevice;
/* Get status for drive 1 */
du->dk_error = inb(du->dk_port + wd_error);
/* printf("Error (drv 1) : %x\n", du->dk_error); */
/*
* Sometimes (apparently mostly with ATAPI
* drives involved) 0x81 really means 0x81
* (drive 0 OK, drive 1 failed).
*/
if(du->dk_error != 0x01 && du->dk_error != 0x81)
goto nodevice;
} else /* drive 0 fail */
goto nodevice;
}
free(du, M_TEMP);
return (IO_WDCSIZE);
nodevice:
free(du, M_TEMP);
return (0);
}
/*
* Attach each drive if possible.
*/
static int
wdattach(struct isa_device *dvp)
{
#ifdef DEVFS
int mynor;
#endif
int unit, lunit;
struct isa_device *wdup;
struct disk *du;
struct wdparams *wp;
if (dvp->id_unit >= NWDC)
return (0);
#ifdef CMD640
if (eide_quirks & Q_CMD640B) {
if (dvp->id_unit == PRIMARY) {
printf("wdc0: CMD640B workaround enabled\n");
bufq_init(&wdtab[PRIMARY].controller_queue);
}
} else
bufq_init(&wdtab[dvp->id_unit].controller_queue);
#else
bufq_init(&wdtab[dvp->id_unit].controller_queue);
#endif
for (wdup = isa_biotab_wdc; wdup->id_driver != 0; wdup++) {
if (wdup->id_iobase != dvp->id_iobase)
continue;
lunit = wdup->id_unit;
if (lunit >= NWD)
continue;
unit = wdup->id_physid;
du = malloc(sizeof *du, M_TEMP, M_NOWAIT);
if (du == NULL)
continue;
if (wddrives[lunit] != NULL)
panic("drive attached twice");
wddrives[lunit] = du;
bufq_init(&drive_queue[lunit]);
bzero(du, sizeof *du);
du->dk_ctrlr = dvp->id_unit;
#ifdef CMD640
if (eide_quirks & Q_CMD640B) {
du->dk_ctrlr_cmd640 = PRIMARY;
} else {
du->dk_ctrlr_cmd640 = du->dk_ctrlr;
}
#endif
du->dk_unit = unit;
du->dk_lunit = lunit;
du->dk_port = dvp->id_iobase;
du->dk_altport = du->dk_port + wd_ctlr;
/*
* Use the individual device flags or the controller
* flags.
*/
du->cfg_flags = wdup->id_flags |
((dvp->id_flags) >> (16 * unit));
if (wdgetctlr(du) == 0) {
/*
* Print out description of drive.
* wdp_model may not be null terminated.
*/
printf("wdc%d: unit %d (wd%d): <%.*s>",
dvp->id_unit, unit, lunit,
sizeof du->dk_params.wdp_model,
du->dk_params.wdp_model);
if (du->dk_flags & DKFL_USEDMA)
printf(", DMA");
if (du->dk_flags & DKFL_32BIT)
printf(", 32-bit");
if (du->dk_multi > 1)
printf(", multi-block-%d", du->dk_multi);
if (du->cfg_flags & WDOPT_SLEEPHACK)
printf(", sleep-hack");
printf("\n");
if (du->dk_params.wdp_heads == 0)
printf("wd%d: size unknown, using %s values\n",
lunit, du->dk_dd.d_secperunit > 17
? "BIOS" : "fake");
printf(
"wd%d: %luMB (%lu sectors), %lu cyls, %lu heads, %lu S/T, %lu B/S\n",
lunit,
du->dk_dd.d_secperunit
/ ((1024L * 1024L) / du->dk_dd.d_secsize),
du->dk_dd.d_secperunit,
du->dk_dd.d_ncylinders,
du->dk_dd.d_ntracks,
du->dk_dd.d_nsectors,
du->dk_dd.d_secsize);
if (bootverbose) {
wp = &du->dk_params;
printf(
"wd%d: ATA INQUIRE valid = %04x, dmamword = %04x, apio = %04x, udma = %04x\n",
du->dk_lunit,
wp->wdp_atavalid,
wp->wdp_dmamword,
wp->wdp_eidepiomodes,
wp->wdp_udmamode);
}
/*
* Start timeout routine for this drive.
* XXX timeout should be per controller.
*/
wdtimeout(du);
#ifdef DEVFS
mynor = dkmakeminor(lunit, WHOLE_DISK_SLICE, RAW_PART);
du->dk_bdev = devfs_add_devswf(&wd_bdevsw, mynor,
DV_BLK, UID_ROOT,
GID_OPERATOR, 0640,
"wd%d", lunit);
du->dk_cdev = devfs_add_devswf(&wd_cdevsw, mynor,
DV_CHR, UID_ROOT,
GID_OPERATOR, 0640,
"rwd%d", lunit);
#endif
if (dk_ndrive < DK_NDRIVE) {
sprintf(dk_names[dk_ndrive], "wd%d", lunit);
/*
* XXX we don't know the transfer rate of the
* drive. Guess the maximum ISA rate of
* 4MB/sec. `wpms' is words per _second_
* according to iostat.
*/
dk_wpms[dk_ndrive] = 4 * 1024 * 1024 / 2;
du->dk_dkunit = dk_ndrive++;
} else {
du->dk_dkunit = -1;
}
} else {
free(du, M_TEMP);
wddrives[lunit] = NULL;
}
}
#ifdef ATAPI
/*
* Probe all free IDE units, searching for ATAPI drives.
*/
for (unit=0; unit<2; ++unit) {
for (lunit=0; lunit<NWD && wddrives[lunit]; ++lunit)
if (wddrives[lunit]->dk_ctrlr == dvp->id_unit &&
wddrives[lunit]->dk_unit == unit)
goto next;
#ifdef CMD640
if (atapi_attach (dvp->id_unit, unit, dvp->id_iobase))
atapictrlr = dvp->id_unit;
#else
atapi_attach (dvp->id_unit, unit, dvp->id_iobase);
#endif
next: ;
}
#endif
/*
* Discard any interrupts generated by wdgetctlr(). wdflushirq()
* doesn't work now because the ambient ipl is too high.
*/
#ifdef CMD640
if (eide_quirks & Q_CMD640B) {
wdtab[PRIMARY].b_active = 2;
} else {
wdtab[dvp->id_unit].b_active = 2;
}
#else
wdtab[dvp->id_unit].b_active = 2;
#endif
return (1);
}
/* Read/write routine for a buffer. Finds the proper unit, range checks
* arguments, and schedules the transfer. Does not wait for the transfer
* to complete. Multi-page transfers are supported. All I/O requests must
* be a multiple of a sector in length.
*/
void
wdstrategy(register struct buf *bp)
{
struct disk *du;
int lunit = dkunit(bp->b_dev);
int s;
/* valid unit, controller, and request? */
if (lunit >= NWD || bp->b_blkno < 0 || (du = wddrives[lunit]) == NULL
|| bp->b_bcount % DEV_BSIZE != 0) {
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto done;
}
/*
* Do bounds checking, adjust transfer, and set b_pblkno.
*/
if (dscheck(bp, du->dk_slices) <= 0)
goto done;
/*
* Check for *any* block on this transfer being on the bad block list
* if it is, then flag the block as a transfer that requires
* bad block handling. Also, used as a hint for low level disksort
* clustering code to keep from coalescing a bad transfer into
* a normal transfer. Single block transfers for a large number of
* blocks associated with a cluster I/O are undesirable.
*
* XXX the old disksort() doesn't look at B_BAD. Coalescing _is_
* desirable. We should split the results at bad blocks just
* like we should split them at MAXTRANSFER boundaries.
*/
if (dsgetbad(bp->b_dev, du->dk_slices) != NULL) {
long *badsect = dsgetbad(bp->b_dev, du->dk_slices)->bi_bad;
int i;
int nsecs = howmany(bp->b_bcount, DEV_BSIZE);
/* XXX pblkno is too physical. */
daddr_t nspblkno = bp->b_pblkno
- du->dk_slices->dss_slices[dkslice(bp->b_dev)].ds_offset;
int blkend = nspblkno + nsecs;
for (i = 0; badsect[i] != -1 && badsect[i] < blkend; i++) {
if (badsect[i] >= nspblkno) {
bp->b_flags |= B_BAD;
break;
}
}
}
/* queue transfer on drive, activate drive and controller if idle */
s = splbio();
bufqdisksort(&drive_queue[lunit], bp);
if (wdutab[lunit].b_active == 0)
wdustart(du); /* start drive */
/* Pick up changes made by readdisklabel(). */
if (du->dk_flags & DKFL_LABELLING && du->dk_state > RECAL) {
wdsleep(du->dk_ctrlr, "wdlab");
du->dk_state = WANTOPEN;
}
#ifdef CMD640
if (wdtab[du->dk_ctrlr_cmd640].b_active == 0)
#else
if (wdtab[du->dk_ctrlr].b_active == 0)
#endif
wdstart(du->dk_ctrlr); /* start controller */
if (du->dk_dkunit >= 0) {
/*
* XXX perhaps we should only count successful transfers.
*/
dk_xfer[du->dk_dkunit]++;
/*
* XXX we can't count seeks correctly but we can do better
* than this. E.g., assume that the geometry is correct
* and count 1 seek if the starting cylinder of this i/o
* differs from the starting cylinder of the previous i/o,
* or count 1 seek if the starting bn of this i/o doesn't
* immediately follow the ending bn of the previos i/o.
*/
dk_seek[du->dk_dkunit]++;
}
splx(s);
return;
done:
s = splbio();
/* toss transfer, we're done early */
biodone(bp);
splx(s);
}
static void
wdstrategy1(struct buf *bp)
{
/*
* XXX - do something to make wdstrategy() but not this block while
* we're doing dsinit() and dsioctl().
*/
wdstrategy(bp);
}
/*
* Routine to queue a command to the controller. The unit's
* request is linked into the active list for the controller.
* If the controller is idle, the transfer is started.
*/
static void
wdustart(register struct disk *du)
{
register struct buf *bp;
#ifdef CMD640
int ctrlr = du->dk_ctrlr_cmd640;
#else
int ctrlr = du->dk_ctrlr;
#endif
/* unit already active? */
if (wdutab[du->dk_lunit].b_active)
return;
bp = bufq_first(&drive_queue[du->dk_lunit]);
if (bp == NULL) { /* yes, an assign */
return;
}
bufq_remove(&drive_queue[du->dk_lunit], bp);
/* link onto controller queue */
bufq_insert_tail(&wdtab[ctrlr].controller_queue, bp);
/* mark the drive unit as busy */
wdutab[du->dk_lunit].b_active = 1;
}
/*
* Controller startup routine. This does the calculation, and starts
* a single-sector read or write operation. Called to start a transfer,
* or from the interrupt routine to continue a multi-sector transfer.
* RESTRICTIONS:
* 1. The transfer length must be an exact multiple of the sector size.
*/
void
wdstart(int ctrlr)
{
register struct disk *du;
register struct buf *bp;
struct diskgeom *lp; /* XXX sic */
long blknum;
long secpertrk, secpercyl;
int lunit;
int count;
#ifdef CMD640
int ctrlr_atapi;
if (eide_quirks & Q_CMD640B) {
ctrlr = PRIMARY;
ctrlr_atapi = atapictrlr;
} else {
ctrlr_atapi = ctrlr;
}
#endif
#ifdef ATAPI
if (wdtab[ctrlr].b_active == 2)
wdtab[ctrlr].b_active = 0;
if (wdtab[ctrlr].b_active)
return;
#endif
/* is there a drive for the controller to do a transfer with? */
bp = bufq_first(&wdtab[ctrlr].controller_queue);
if (bp == NULL) {
#ifdef ATAPI
#ifdef CMD640
if (atapi_start && atapi_start (ctrlr_atapi))
wdtab[ctrlr].b_active = 3;
#else
if (atapi_start && atapi_start (ctrlr))
/* mark controller active in ATAPI mode */
wdtab[ctrlr].b_active = 3;
#endif
#endif
return;
}
/* obtain controller and drive information */
lunit = dkunit(bp->b_dev);
du = wddrives[lunit];
/* if not really a transfer, do control operations specially */
if (du->dk_state < OPEN) {
if (du->dk_state != WANTOPEN)
printf("wd%d: wdstart: weird dk_state %d\n",
du->dk_lunit, du->dk_state);
if (wdcontrol(bp) != 0)
printf("wd%d: wdstart: wdcontrol returned nonzero, state = %d\n",
du->dk_lunit, du->dk_state);
return;
}
/* calculate transfer details */
blknum = bp->b_pblkno + du->dk_skip;
#ifdef WDDEBUG
if (du->dk_skip == 0)
printf("wd%d: wdstart: %s %d@%d; map ", lunit,
(bp->b_flags & B_READ) ? "read" : "write",
bp->b_bcount, blknum);
else
printf(" %d)%x", du->dk_skip, inb(du->dk_altport));
#endif
lp = &du->dk_dd;
secpertrk = lp->d_nsectors;
secpercyl = lp->d_secpercyl;
if (du->dk_skip == 0) {
du->dk_bc = bp->b_bcount;
if (bp->b_flags & B_BAD
/*
* XXX handle large transfers inefficiently instead
* of crashing on them.
*/
|| howmany(du->dk_bc, DEV_BSIZE) > MAXTRANSFER)
du->dk_flags |= DKFL_SINGLE;
}
if (du->dk_flags & DKFL_SINGLE
&& dsgetbad(bp->b_dev, du->dk_slices) != NULL) {
/* XXX */
u_long ds_offset =
du->dk_slices->dss_slices[dkslice(bp->b_dev)].ds_offset;
blknum = transbad144(dsgetbad(bp->b_dev, du->dk_slices),
blknum - ds_offset) + ds_offset;
}
wdtab[ctrlr].b_active = 1; /* mark controller active */
/* if starting a multisector transfer, or doing single transfers */
if (du->dk_skip == 0 || (du->dk_flags & DKFL_SINGLE)) {
u_int command;
u_int count1;
long cylin, head, sector;
cylin = blknum / secpercyl;
head = (blknum % secpercyl) / secpertrk;
sector = blknum % secpertrk;
/*
* XXX this looks like an attempt to skip bad sectors
* on write.
*/
if (wdtab[ctrlr].b_errcnt && (bp->b_flags & B_READ) == 0)
du->dk_bc += DEV_BSIZE;
count1 = howmany( du->dk_bc, DEV_BSIZE);
du->dk_flags &= ~DKFL_MULTI;
#ifdef B_FORMAT
if (bp->b_flags & B_FORMAT) {
command = WDCC_FORMAT;
count1 = lp->d_nsectors;
sector = lp->d_gap3 - 1; /* + 1 later */
} else
#endif
{
if (du->dk_flags & DKFL_SINGLE) {
command = (bp->b_flags & B_READ)
? WDCC_READ : WDCC_WRITE;
count1 = 1;
du->dk_currentiosize = 1;
} else {
if((du->dk_flags & DKFL_USEDMA) &&
wddma[du->dk_interface].wdd_dmaverify(du->dk_dmacookie,
(void *)((int)bp->b_un.b_addr +
du->dk_skip * DEV_BSIZE),
du->dk_bc,
bp->b_flags & B_READ)) {
du->dk_flags |= DKFL_DMA;
if( bp->b_flags & B_READ)
command = WDCC_READ_DMA;
else
command = WDCC_WRITE_DMA;
du->dk_currentiosize = count1;
} else if( (count1 > 1) && (du->dk_multi > 1)) {
du->dk_flags |= DKFL_MULTI;
if( bp->b_flags & B_READ) {
command = WDCC_READ_MULTI;
} else {
command = WDCC_WRITE_MULTI;
}
du->dk_currentiosize = du->dk_multi;
if( du->dk_currentiosize > count1)
du->dk_currentiosize = count1;
} else {
if( bp->b_flags & B_READ) {
command = WDCC_READ;
} else {
command = WDCC_WRITE;
}
du->dk_currentiosize = 1;
}
}
}
/*
* XXX this loop may never terminate. The code to handle
* counting down of retries and eventually failing the i/o
* is in wdintr() and we can't get there from here.
*/
if (wdtest != 0) {
if (--wdtest == 0) {
wdtest = 100;
printf("dummy wdunwedge\n");
wdunwedge(du);
}
}
if(du->dk_dkunit >= 0) {
dk_busy |= 1 << du->dk_dkunit;
}
if ((du->dk_flags & (DKFL_DMA|DKFL_SINGLE)) == DKFL_DMA) {
wddma[du->dk_interface].wdd_dmaprep(du->dk_dmacookie,
(void *)((int)bp->b_un.b_addr +
du->dk_skip * DEV_BSIZE),
du->dk_bc,
bp->b_flags & B_READ);
}
while (wdcommand(du, cylin, head, sector, count1, 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_altport));
#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.
*
* On the first try, we give it 10 seconds, for drives that may need
* to spin up.
*
* 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.
*/
if (wdtab[ctrlr].b_errcnt == 0)
du->dk_timeout = 1 + 10;
else
du->dk_timeout = 1 + 3;
/* if this is a DMA op, start DMA and go away until it's done. */
if ((du->dk_flags & (DKFL_DMA|DKFL_SINGLE)) == DKFL_DMA) {
wddma[du->dk_interface].wdd_dmastart(du->dk_dmacookie);
return;
}
/* If this is a read operation, just go away until it's done. */
if (bp->b_flags & B_READ)
return;
/* Ready to send data? */
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) < 0) {
wderror(bp, du, "wdstart: timeout waiting for DRQ");
/*
* XXX what do we do now? If we've just issued the command,
* then we can treat this failure the same as a command
* failure. But if we are continuing a multi-sector write,
* the command was issued ages ago, so we can't simply
* restart it.
*
* XXX we waste a lot of time unnecessarily translating block
* numbers to cylin/head/sector for continued i/o's.
*/
}
count = 1;
if( du->dk_flags & DKFL_MULTI) {
count = howmany(du->dk_bc, DEV_BSIZE);
if( count > du->dk_multi)
count = du->dk_multi;
if( du->dk_currentiosize > count)
du->dk_currentiosize = count;
}
if (du->dk_flags & DKFL_32BIT)
outsl(du->dk_port + wd_data,
(void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE),
(count * DEV_BSIZE) / sizeof(long));
else
outsw(du->dk_port + wd_data,
(void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE),
(count * DEV_BSIZE) / sizeof(short));
du->dk_bc -= DEV_BSIZE * count;
if (du->dk_dkunit >= 0) {
/*
* `wd's are blocks of 32 16-bit `word's according to
* iostat. dk_wds[] is the one disk i/o statistic that
* we can record correctly.
* XXX perhaps we shouldn't record words for failed
* transfers.
*/
dk_wds[du->dk_dkunit] += (count * DEV_BSIZE) >> 6;
}
}
/* Interrupt routine for the controller. Acknowledge the interrupt, check for
* errors on the current operation, mark it done if necessary, and start
* the next request. Also check for a partially done transfer, and
* continue with the next chunk if so.
*/
void
wdintr(int unit)
{
register struct disk *du;
register struct buf *bp;
int dmastat;
#ifdef CMD640
int ctrlr_atapi;
if (eide_quirks & Q_CMD640B) {
unit = PRIMARY;
ctrlr_atapi = atapictrlr;
} else {
ctrlr_atapi = unit;
}
#endif
if (wdtab[unit].b_active == 2)
return; /* intr in wdflushirq() */
if (!wdtab[unit].b_active) {
#ifdef WDDEBUG
/*
* These happen mostly because the power-mgt part of the
* bios shuts us down, and we just manage to see the
* interrupt from the "SLEEP" command.
*/
printf("wdc%d: extra interrupt\n", unit);
#endif
return;
}
#ifdef ATAPI
if (wdtab[unit].b_active == 3) {
/* process an ATAPI interrupt */
#ifdef CMD640
if (atapi_intr && atapi_intr (ctrlr_atapi))
#else
if (atapi_intr && atapi_intr (unit))
#endif
/* ATAPI op continues */
return;
/* controller is free, start new op */
wdtab[unit].b_active = 0;
wdstart (unit);
return;
}
#endif
bp = bufq_first(&wdtab[unit].controller_queue);
du = wddrives[dkunit(bp->b_dev)];
/* finish off DMA */
if (du->dk_flags & (DKFL_DMA|DKFL_USEDMA)) {
/* XXX SMP boxes sometimes generate an early intr. Why? */
if ((wddma[du->dk_interface].wdd_dmastatus(du->dk_dmacookie) & WDDS_INTERRUPT)
== 0)
return;
dmastat = wddma[du->dk_interface].wdd_dmadone(du->dk_dmacookie);
}
du->dk_timeout = 0;
/* check drive status/failure */
if (wdwait(du, 0, TIMEOUT) < 0) {
wderror(bp, du, "wdintr: timeout waiting for status");
du->dk_status |= WDCS_ERR; /* XXX */
}
/* is it not a transfer, but a control operation? */
if (du->dk_state < OPEN) {
wdtab[unit].b_active = 0;
switch (wdcontrol(bp)) {
case 0:
return;
case 1:
wdstart(unit);
return;
case 2:
goto done;
}
}
/* have we an error? */
if ((du->dk_status & (WDCS_ERR | WDCS_ECCCOR))
|| (((du->dk_flags & (DKFL_DMA|DKFL_SINGLE)) == DKFL_DMA)
&& dmastat != WDDS_INTERRUPT)) {
unsigned int errstat;
oops:
/*
* XXX bogus inb() here
*/
errstat = inb(du->dk_port + wd_error);
if(((du->dk_flags & (DKFL_DMA|DKFL_SINGLE)) == DKFL_DMA) &&
(errstat & WDERR_ABORT)) {
wderror(bp, du, "reverting to PIO mode");
du->dk_flags &= ~DKFL_USEDMA;
} else if((du->dk_flags & DKFL_MULTI) &&
(errstat & WDERR_ABORT)) {
wderror(bp, du, "reverting to non-multi sector mode");
du->dk_multi = 1;
}
if (!(du->dk_status & (WDCS_ERR | WDCS_ECCCOR)) &&
(((du->dk_flags & (DKFL_DMA|DKFL_SINGLE)) == DKFL_DMA) &&
(dmastat != WDDS_INTERRUPT)))
printf("wd%d: DMA failure, DMA status %b\n",
du->dk_lunit, dmastat, WDDS_BITS);
#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
if (du->dk_flags & DKFL_BADSCAN) {
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
} else 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 if (du->dk_status & WDCS_ECCCOR)
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)
&& !((du->dk_flags & (DKFL_DMA|DKFL_SINGLE)) == DKFL_DMA)
&& wdtab[unit].b_active) {
int chk, dummy, multisize;
multisize = chk = du->dk_currentiosize * DEV_BSIZE;
if( du->dk_bc < chk) {
chk = du->dk_bc;
if( ((chk + DEV_BSIZE - 1) / DEV_BSIZE) < du->dk_currentiosize) {
du->dk_currentiosize = (chk + DEV_BSIZE - 1) / DEV_BSIZE;
multisize = du->dk_currentiosize * DEV_BSIZE;
}
}
/* ready to receive data? */
if ((du->dk_status & (WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ))
!= (WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ))
wderror(bp, du, "wdintr: read intr arrived early");
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) != 0) {
wderror(bp, du, "wdintr: read error detected late");
goto oops;
}
/* suck in data */
if( du->dk_flags & DKFL_32BIT)
insl(du->dk_port + wd_data,
(void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE),
chk / sizeof(long));
else
insw(du->dk_port + wd_data,
(void *)((int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE),
chk / sizeof(short));
du->dk_bc -= chk;
/* XXX for obsolete fractional sector reads. */
while (chk < multisize) {
insw(du->dk_port + wd_data, &dummy, 1);
chk += sizeof(short);
}
if (du->dk_dkunit >= 0)
dk_wds[du->dk_dkunit] += chk >> 6;
}
/* final cleanup on DMA */
if (((bp->b_flags & B_ERROR) == 0)
&& ((du->dk_flags & (DKFL_DMA|DKFL_SINGLE)) == DKFL_DMA)
&& wdtab[unit].b_active) {
int iosize;
iosize = du->dk_currentiosize * DEV_BSIZE;
du->dk_bc -= iosize;
if (du->dk_dkunit >= 0)
dk_wds[du->dk_dkunit] += iosize >> 6;
}
outt:
if (wdtab[unit].b_active) {
if ((bp->b_flags & B_ERROR) == 0) {
du->dk_skip += du->dk_currentiosize;/* add to successful sectors */
if (wdtab[unit].b_errcnt)
wderror(bp, du, "soft error");
wdtab[unit].b_errcnt = 0;
/* see if more to transfer */
if (du->dk_bc > 0 && (du->dk_flags & DKFL_ERROR) == 0) {
if( (du->dk_flags & DKFL_SINGLE) ||
((bp->b_flags & B_READ) == 0)) {
wdtab[unit].b_active = 0;
wdstart(unit);
} else {
du->dk_timeout = 1 + 3;
}
return; /* next chunk is started */
} else if ((du->dk_flags & (DKFL_SINGLE | DKFL_ERROR))
== DKFL_ERROR) {
du->dk_skip = 0;
du->dk_flags &= ~DKFL_ERROR;
du->dk_flags |= DKFL_SINGLE;
wdtab[unit].b_active = 0;
wdstart(unit);
return; /* redo xfer sector by sector */
}
}
done: ;
/* done with this transfer, with or without error */
du->dk_flags &= ~(DKFL_SINGLE|DKFL_DMA);
bufq_remove( &wdtab[unit].controller_queue, bp);
wdtab[unit].b_errcnt = 0;
bp->b_resid = bp->b_bcount - du->dk_skip * DEV_BSIZE;
wdutab[du->dk_lunit].b_active = 0;
du->dk_skip = 0;
biodone(bp);
}
if(du->dk_dkunit >= 0) {
dk_busy &= ~(1 << du->dk_dkunit);
}
/* controller idle */
wdtab[unit].b_active = 0;
/* anything more on drive queue? */
wdustart(du);
/* anything more for controller to do? */
#ifndef ATAPI
/* This is not valid in ATAPI mode. */
if (bufq_first(&wdtab[unit].controller_queue) != NULL)
#endif
wdstart(unit);
}
/*
* Initialize a drive.
*/
int
wdopen(dev_t dev, int flags, int fmt, struct proc *p)
{
register unsigned int lunit;
register struct disk *du;
int error;
lunit = dkunit(dev);
if (lunit >= NWD || dktype(dev) != 0)
return (ENXIO);
du = wddrives[lunit];
if (du == NULL)
return (ENXIO);
/* Finish flushing IRQs left over from wdattach(). */
#ifdef CMD640
if (wdtab[du->dk_ctrlr_cmd640].b_active == 2)
wdtab[du->dk_ctrlr_cmd640].b_active = 0;
#else
if (wdtab[du->dk_ctrlr].b_active == 2)
wdtab[du->dk_ctrlr].b_active = 0;
#endif
du->dk_flags &= ~DKFL_BADSCAN;
/* spin waiting for anybody else reading the disk label */
while (du->dk_flags & DKFL_LABELLING)
tsleep((caddr_t)&du->dk_flags, PZERO - 1, "wdopen", 1);
#if 1
wdsleep(du->dk_ctrlr, "wdopn1");
du->dk_flags |= DKFL_LABELLING;
du->dk_state = WANTOPEN;
{
struct disklabel label;
bzero(&label, sizeof label);
label.d_secsize = du->dk_dd.d_secsize;
label.d_nsectors = du->dk_dd.d_nsectors;
label.d_ntracks = du->dk_dd.d_ntracks;
label.d_ncylinders = du->dk_dd.d_ncylinders;
label.d_secpercyl = du->dk_dd.d_secpercyl;
label.d_secperunit = du->dk_dd.d_secperunit;
error = dsopen("wd", dev, fmt, &du->dk_slices, &label, wdstrategy1,
(ds_setgeom_t *)NULL, &wd_bdevsw, &wd_cdevsw);
}
du->dk_flags &= ~DKFL_LABELLING;
wdsleep(du->dk_ctrlr, "wdopn2");
return (error);
#else
if ((du->dk_flags & DKFL_BSDLABEL) == 0) {
/*
* wdtab[ctrlr].b_active != 0 implies XXX applicable now ??
* drive_queue[lunit].b_act == NULL (?) XXX applicable now ??
* so the following guards most things (until the next i/o).
* It doesn't guard against a new i/o starting and being
* affected by the label being changed. Sigh.
*/
wdsleep(du->dk_ctrlr, "wdopn1");
du->dk_flags |= DKFL_LABELLING;
du->dk_state = WANTOPEN;
error = dsinit(dkmodpart(dev, RAW_PART), wdstrategy,
&du->dk_dd, &du->dk_slices);
if (error != 0) {
du->dk_flags &= ~DKFL_LABELLING;
return (error);
}
/* XXX check value returned by wdwsetctlr(). */
wdwsetctlr(du);
if (dkslice(dev) == WHOLE_DISK_SLICE) {
dsopen(dev, fmt, du->dk_slices);
return (0);
}
/*
* Read label using RAW_PART partition.
*
* If the drive has an MBR, then the current geometry (from
* wdgetctlr()) is used to read it; then the BIOS/DOS
* geometry is inferred and used to read the label off the
* 'c' partition. Otherwise the label is read using the
* current geometry. The label gives the final geometry.
* If bad sector handling is enabled, then this geometry
* is used to read the bad sector table. The geometry
* changes occur inside readdisklabel() and are propagated
* to the driver by resetting the state machine.
*
* XXX can now handle changes directly since dsinit() doesn't
* do too much.
*/
msg = correct_readdisklabel(dkmodpart(dev, RAW_PART), wdstrategy,
&du->dk_dd);
/* XXX check value returned by wdwsetctlr(). */
wdwsetctlr(du);
if (msg == NULL && du->dk_dd.d_flags & D_BADSECT)
msg = readbad144(dkmodpart(dev, RAW_PART), wdstrategy,
&du->dk_dd, &du->dk_bad);
du->dk_flags &= ~DKFL_LABELLING;
if (msg != NULL) {
log(LOG_WARNING, "wd%d: cannot find label (%s)\n",
lunit, msg);
if (part != RAW_PART)
return (EINVAL); /* XXX needs translation */
/*
* Soon return. This is how slices without labels
* are allowed. They only work on the raw partition.
*/
} else {
unsigned long newsize, offset, size;
#if 0
/*
* Force RAW_PART partition to be the whole disk.
*/
offset = du->dk_dd.d_partitions[RAW_PART].p_offset;
if (offset != 0) {
printf(
"wd%d: changing offset of '%c' partition from %lu to 0\n",
du->dk_lunit, 'a' + RAW_PART, offset);
du->dk_dd.d_partitions[RAW_PART].p_offset = 0;
}
size = du->dk_dd.d_partitions[RAW_PART].p_size;
newsize = du->dk_dd.d_secperunit; /* XXX */
if (size != newsize) {
printf(
"wd%d: changing size of '%c' partition from %lu to %lu\n",
du->dk_lunit, 'a' + RAW_PART, size,
newsize);
du->dk_dd.d_partitions[RAW_PART].p_size
= newsize;
}
#endif
}
/* Pick up changes made by readdisklabel(). */
wdsleep(du->dk_ctrlr, "wdopn2");
du->dk_state = WANTOPEN;
}
/*
* Warn if a partion is opened that overlaps another partition which
* is open unless one is the "raw" partition (whole disk).
*/
if ((du->dk_openpart & mask) == 0 && part != RAW_PART) {
int start, end;
pp = &du->dk_dd.d_partitions[part];
start = pp->p_offset;
end = pp->p_offset + pp->p_size;
for (pp = du->dk_dd.d_partitions;
pp < &du->dk_dd.d_partitions[du->dk_dd.d_npartitions];
pp++) {
if (pp->p_offset + pp->p_size <= start ||
pp->p_offset >= end)
continue;
if (pp - du->dk_dd.d_partitions == RAW_PART)
continue;
if (du->dk_openpart
& (1 << (pp - du->dk_dd.d_partitions)))
log(LOG_WARNING,
"wd%d%c: overlaps open partition (%c)\n",
lunit, part + 'a',
pp - du->dk_dd.d_partitions + 'a');
}
}
if (part >= du->dk_dd.d_npartitions && part != RAW_PART)
return (ENXIO);
dsopen(dev, fmt, du->dk_slices);
return (0);
#endif
}
/*
* Implement operations other than read/write.
* Called from wdstart or wdintr during opens and formats.
* Uses finite-state-machine to track progress of operation in progress.
* Returns 0 if operation still in progress, 1 if completed, 2 if error.
*/
static int
wdcontrol(register struct buf *bp)
{
register struct disk *du;
int ctrlr;
du = wddrives[dkunit(bp->b_dev)];
#ifdef CMD640
ctrlr = du->dk_ctrlr_cmd640;
#else
ctrlr = du->dk_ctrlr;
#endif
switch (du->dk_state) {
case WANTOPEN:
tryagainrecal:
wdtab[ctrlr].b_active = 1;
if (wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) != 0) {
wderror(bp, du, "wdcontrol: wdcommand failed");
goto maybe_retry;
}
du->dk_state = RECAL;
return (0);
case RECAL:
if (du->dk_status & WDCS_ERR || wdsetctlr(du) != 0) {
wderror(bp, du, "wdcontrol: recal failed");
maybe_retry:
if (du->dk_status & WDCS_ERR)
wdunwedge(du);
du->dk_state = WANTOPEN;
if (++wdtab[ctrlr].b_errcnt < RETRIES)
goto tryagainrecal;
bp->b_error = ENXIO; /* XXX needs translation */
bp->b_flags |= B_ERROR;
return (2);
}
wdtab[ctrlr].b_errcnt = 0;
du->dk_state = OPEN;
/*
* The rest of the initialization can be done by normal
* means.
*/
return (1);
}
panic("wdcontrol");
return (2);
}
/*
* Wait uninterruptibly until controller is not busy, then send it a command.
* The wait usually terminates immediately because we waited for the previous
* command to terminate.
*/
static int
wdcommand(struct disk *du, u_int cylinder, u_int head, u_int sector,
u_int count, u_int command)
{
u_int wdc;
wdc = du->dk_port;
if (du->cfg_flags & WDOPT_SLEEPHACK) {
/* OK, so the APM bios has put the disk into SLEEP mode,
* how can we tell ? Uhm, we can't. There is no
* standardized way of finding out, and the only way to
* wake it up is to reset it. Bummer.
*
* All the many and varied versions of the IDE/ATA standard
* explicitly tells us not to look at these registers if
* the disk is in SLEEP mode. Well, too bad really, we
* have to find out if it's in sleep mode before we can
* avoid reading the registers.
*
* I have reason to belive that most disks will return
* either 0xff or 0x00 in all but the status register
* when in SLEEP mode, but I have yet to see one return
* 0x00, so we don't check for that yet.
*
* The check for WDCS_BUSY is for the case where the
* bios spins up the disk for us, but doesn't initialize
* it correctly /phk
*/
if(inb(wdc + wd_precomp) + inb(wdc + wd_cyl_lo) +
inb(wdc + wd_cyl_hi) + inb(wdc + wd_sdh) +
inb(wdc + wd_sector) + inb(wdc + wd_seccnt) == 6 * 0xff) {
if (bootverbose)
printf("wd(%d,%d): disk aSLEEP\n",
du->dk_ctrlr, du->dk_unit);
wdunwedge(du);
} else if(inb(wdc + wd_status) == WDCS_BUSY) {
if (bootverbose)
printf("wd(%d,%d): disk is BUSY\n",
du->dk_ctrlr, du->dk_unit);
wdunwedge(du);
}
}
if (wdwait(du, 0, TIMEOUT) < 0)
return (1);
if( command == WDCC_FEATURES) {
outb(wdc + wd_features, count);
if ( count == WDFEA_SETXFER )
outb(wdc + wd_seccnt, sector);
} else {
outb(wdc + wd_precomp, du->dk_dd.d_precompcyl / 4);
outb(wdc + wd_cyl_lo, cylinder);
outb(wdc + wd_cyl_hi, cylinder >> 8);
outb(wdc + wd_sdh, WDSD_IBM | (du->dk_unit << 4) | head);
outb(wdc + wd_sector, sector + 1);
outb(wdc + wd_seccnt, count);
}
if (wdwait(du, (command == WDCC_DIAGNOSE || command == WDCC_IDC)
? 0 : WDCS_READY, TIMEOUT) < 0)
return (1);
outb(wdc + wd_command, command);
return (0);
}
static void
wdsetmulti(struct disk *du)
{
/*
* The config option flags low 8 bits define the maximum multi-block
* transfer size. If the user wants the maximum that the drive
* is capable of, just set the low bits of the config option to
* 0x00ff.
*/
if ((du->cfg_flags & WDOPT_MULTIMASK) != 0 && (du->dk_multi > 1)) {
int configval = du->cfg_flags & WDOPT_MULTIMASK;
du->dk_multi = min(du->dk_multi, configval);
if (wdcommand(du, 0, 0, 0, du->dk_multi, WDCC_SET_MULTI)) {
du->dk_multi = 1;
} else {
if (wdwait(du, WDCS_READY, TIMEOUT) < 0) {
du->dk_multi = 1;
}
}
} else {
du->dk_multi = 1;
}
}
/*
* issue IDC to drive to tell it just what geometry it is to be.
*/
static int
wdsetctlr(struct disk *du)
{
int error = 0;
#ifdef WDDEBUG
printf("wd(%d,%d): wdsetctlr: C %lu H %lu S %lu\n",
du->dk_ctrlr, du->dk_unit,
du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks,
du->dk_dd.d_nsectors);
#endif
if (du->dk_dd.d_ntracks == 0 || du->dk_dd.d_ntracks > 16) {
struct wdparams *wp;
printf("wd%d: can't handle %lu heads from partition table ",
du->dk_lunit, du->dk_dd.d_ntracks);
/* obtain parameters */
wp = &du->dk_params;
if (wp->wdp_heads > 0 && wp->wdp_heads <= 16) {
printf("(controller value %u restored)\n",
wp->wdp_heads);
du->dk_dd.d_ntracks = wp->wdp_heads;
}
else {
printf("(truncating to 16)\n");
du->dk_dd.d_ntracks = 16;
}
}
if (du->dk_dd.d_nsectors == 0 || du->dk_dd.d_nsectors > 255) {
printf("wd%d: cannot handle %lu sectors (max 255)\n",
du->dk_lunit, du->dk_dd.d_nsectors);
error = 1;
}
if (error) {
#ifdef CMD640
wdtab[du->dk_ctrlr_cmd640].b_errcnt += RETRIES;
#else
wdtab[du->dk_ctrlr].b_errcnt += RETRIES;
#endif
return (1);
}
if (wdcommand(du, du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks - 1, 0,
du->dk_dd.d_nsectors, WDCC_IDC) != 0
|| wdwait(du, WDCS_READY, TIMEOUT) < 0) {
wderror((struct buf *)NULL, du, "wdsetctlr failed");
return (1);
}
wdsetmulti(du);
#ifdef NOTYET
/* set read caching and write caching */
wdcommand(du, 0, 0, 0, WDFEA_RCACHE, WDCC_FEATURES);
wdwait(du, WDCS_READY, TIMEOUT);
wdcommand(du, 0, 0, 0, WDFEA_WCACHE, WDCC_FEATURES);
wdwait(du, WDCS_READY, TIMEOUT);
#endif
return (0);
}
#if 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);
}
#endif
/*
* gross little callback function for wdddma interface. returns 1 for
* success, 0 for failure.
*/
static int
wdsetmode(int mode, void *wdinfo)
{
int i;
struct disk *du;
du = wdinfo;
if (bootverbose)
printf("wd%d: wdsetmode() setting transfer mode to %02x\n",
du->dk_lunit, mode);
i = wdcommand(du, 0, 0, mode, WDFEA_SETXFER,
WDCC_FEATURES) == 0 &&
wdwait(du, WDCS_READY, TIMEOUT) == 0;
return i;
}
/*
* issue READP to drive to ask it what it is.
*/
static int
wdgetctlr(struct disk *du)
{
int i;
char tb[DEV_BSIZE], tb2[DEV_BSIZE];
struct wdparams *wp = NULL;
u_long flags = du->cfg_flags;
again:
if (wdcommand(du, 0, 0, 0, 0, WDCC_READP) != 0
|| wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT) != 0) {
/*
* if we failed on the second try, assume non-32bit
*/
if( du->dk_flags & DKFL_32BIT)
goto failed;
/* XXX need to check error status after final transfer. */
/*
* Old drives don't support WDCC_READP. Try a seek to 0.
* Some IDE controllers return trash if there is no drive
* attached, so first test that the drive can be selected.
* This also avoids long waits for nonexistent drives.
*/
if (wdwait(du, 0, TIMEOUT) < 0)
return (1);
outb(du->dk_port + wd_sdh, WDSD_IBM | (du->dk_unit << 4));
DELAY(5000); /* usually unnecessary; drive select is fast */
/*
* Do this twice: may get a false WDCS_READY the first time.
*/
inb(du->dk_port + wd_status);
if ((inb(du->dk_port + wd_status) & (WDCS_BUSY | WDCS_READY))
!= WDCS_READY
|| wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) != 0
|| wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) != 0)
return (1);
if (du->dk_unit == bootinfo.bi_n_bios_used) {
du->dk_dd.d_secsize = DEV_BSIZE;
du->dk_dd.d_nsectors =
bootinfo.bi_bios_geom[du->dk_unit] & 0xff;
du->dk_dd.d_ntracks =
((bootinfo.bi_bios_geom[du->dk_unit] >> 8) & 0xff)
+ 1;
/* XXX Why 2 ? */
du->dk_dd.d_ncylinders =
(bootinfo.bi_bios_geom[du->dk_unit] >> 16) + 2;
du->dk_dd.d_secpercyl =
du->dk_dd.d_ntracks * du->dk_dd.d_nsectors;
du->dk_dd.d_secperunit =
du->dk_dd.d_secpercyl * du->dk_dd.d_ncylinders;
#if 0
du->dk_dd.d_partitions[WDRAW].p_size =
du->dk_dd.d_secperunit;
du->dk_dd.d_type = DTYPE_ST506;
du->dk_dd.d_subtype |= DSTYPE_GEOMETRY;
strncpy(du->dk_dd.d_typename, "Bios geometry",
sizeof du->dk_dd.d_typename);
strncpy(du->dk_params.wdp_model, "ST506",
sizeof du->dk_params.wdp_model);
#endif
bootinfo.bi_n_bios_used ++;
return 0;
}
/*
* Fake minimal drive geometry for reading the MBR.
* readdisklabel() may enlarge it to read the label and the
* bad sector table.
*/
du->dk_dd.d_secsize = DEV_BSIZE;
du->dk_dd.d_nsectors = 17;
du->dk_dd.d_ntracks = 1;
du->dk_dd.d_ncylinders = 1;
du->dk_dd.d_secpercyl = 17;
du->dk_dd.d_secperunit = 17;
#if 0
/*
* Fake maximal drive size for writing the label.
*/
du->dk_dd.d_partitions[RAW_PART].p_size = 64 * 16 * 1024;
/*
* Fake some more of the label for printing by disklabel(1)
* in case there is no real label.
*/
du->dk_dd.d_type = DTYPE_ST506;
du->dk_dd.d_subtype |= DSTYPE_GEOMETRY;
strncpy(du->dk_dd.d_typename, "Fake geometry",
sizeof du->dk_dd.d_typename);
#endif
/* Fake the model name for printing by wdattach(). */
strncpy(du->dk_params.wdp_model, "unknown",
sizeof du->dk_params.wdp_model);
return (0);
}
/* obtain parameters */
wp = &du->dk_params;
if (du->dk_flags & DKFL_32BIT)
insl(du->dk_port + wd_data, tb, sizeof(tb) / sizeof(long));
else
insw(du->dk_port + wd_data, tb, sizeof(tb) / sizeof(short));
/* try 32-bit data path (VLB IDE controller) */
if (flags & WDOPT_32BIT) {
if (! (du->dk_flags & DKFL_32BIT)) {
bcopy(tb, tb2, sizeof(struct wdparams));
du->dk_flags |= DKFL_32BIT;
goto again;
}
/* check that we really have 32-bit controller */
if (bcmp (tb, tb2, sizeof(struct wdparams)) != 0) {
failed:
/* test failed, use 16-bit i/o mode */
bcopy(tb2, tb, sizeof(struct wdparams));
du->dk_flags &= ~DKFL_32BIT;
}
}
bcopy(tb, wp, sizeof(struct wdparams));
/* shuffle string byte order */
for (i = 0; i < sizeof(wp->wdp_model); i += 2) {
u_short *p;
p = (u_short *) (wp->wdp_model + i);
*p = ntohs(*p);
}
/*
* Clean up the wdp_model by converting nulls to spaces, and
* then removing the trailing spaces.
*/
for (i=0; i < sizeof(wp->wdp_model); i++) {
if (wp->wdp_model[i] == '\0') {
wp->wdp_model[i] = ' ';
}
}
for (i=sizeof(wp->wdp_model)-1; i>=0 && wp->wdp_model[i]==' '; i--) {
wp->wdp_model[i] = '\0';
}
/*
* find out the drives maximum multi-block transfer capability
*/
du->dk_multi = wp->wdp_nsecperint & 0xff;
wdsetmulti(du);
/*
* check drive's DMA capability
*/
if (wddma[du->dk_interface].wdd_candma) {
du->dk_dmacookie = wddma[du->dk_interface].wdd_candma(du->dk_port, du->dk_ctrlr);
/* does user want this? */
if ((du->cfg_flags & WDOPT_DMA) &&
/* have we got a DMA controller? */
du->dk_dmacookie &&
/* can said drive do DMA? */
wddma[du->dk_interface].wdd_dmainit(du->dk_dmacookie, wp, wdsetmode, du)) {
du->dk_flags |= DKFL_USEDMA;
}
} else {
du->dk_dmacookie = NULL;
}
#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_cylinders,
wp->wdp_heads, wp->wdp_sectors, wp->wdp_buffertype,
wp->wdp_buffersize, wp->wdp_model);
#endif
/* update disklabel given drive information */
du->dk_dd.d_secsize = DEV_BSIZE;
du->dk_dd.d_ncylinders = wp->wdp_cylinders; /* +- 1 */
du->dk_dd.d_ntracks = wp->wdp_heads;
du->dk_dd.d_nsectors = wp->wdp_sectors;
du->dk_dd.d_secpercyl = du->dk_dd.d_ntracks * du->dk_dd.d_nsectors;
du->dk_dd.d_secperunit = du->dk_dd.d_secpercyl * du->dk_dd.d_ncylinders;
if (WDOPT_FORCEHD(du->cfg_flags)) {
du->dk_dd.d_ntracks = WDOPT_FORCEHD(du->cfg_flags);
du->dk_dd.d_secpercyl =
du->dk_dd.d_ntracks * du->dk_dd.d_nsectors;
du->dk_dd.d_ncylinders =
du->dk_dd.d_secperunit / du->dk_dd.d_secpercyl;
}
#if 0
du->dk_dd.d_partitions[RAW_PART].p_size = du->dk_dd.d_secperunit;
/* dubious ... */
bcopy("ESDI/IDE", du->dk_dd.d_typename, 9);
bcopy(wp->wdp_model + 20, du->dk_dd.d_packname, 14 - 1);
/* better ... */
du->dk_dd.d_type = DTYPE_ESDI;
du->dk_dd.d_subtype |= DSTYPE_GEOMETRY;
#endif
return (0);
}
int
wdclose(dev_t dev, int flags, int fmt, struct proc *p)
{
dsclose(dev, fmt, wddrives[dkunit(dev)]->dk_slices);
return (0);
}
int
wdioctl(dev_t dev, int cmd, caddr_t addr, int flags, struct proc *p)
{
int lunit = dkunit(dev);
register struct disk *du;
int error;
#ifdef notyet
struct uio auio;
struct iovec aiov;
struct format_op *fop;
#endif
du = wddrives[lunit];
wdsleep(du->dk_ctrlr, "wdioct");
error = dsioctl("wd", dev, cmd, addr, flags, &du->dk_slices,
wdstrategy1, (ds_setgeom_t *)NULL);
if (error != -1)
return (error);
switch (cmd) {
case DIOCSBADSCAN:
if (*(int *)addr)
du->dk_flags |= DKFL_BADSCAN;
else
du->dk_flags &= ~DKFL_BADSCAN;
return (0);
#ifdef notyet
case DIOCWFORMAT:
if (!(flag & FWRITE))
return (EBADF);
fop = (struct format_op *)addr;
aiov.iov_base = fop->df_buf;
aiov.iov_len = fop->df_count;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_resid = fop->df_count;
auio.uio_segflg = 0;
auio.uio_offset = fop->df_startblk * du->dk_dd.d_secsize;
#error /* XXX the 386BSD interface is different */
error = physio(wdformat, &rwdbuf[lunit], 0, dev, B_WRITE,
minphys, &auio);
fop->df_count -= auio.uio_resid;
fop->df_reg[0] = du->dk_status;
fop->df_reg[1] = du->dk_error;
return (error);
#endif
default:
return (ENOTTY);
}
}
#ifdef B_FORMAT
int
wdformat(struct buf *bp)
{
bp->b_flags |= B_FORMAT;
wdstrategy(bp);
/*
* phk put this here, better that return(wdstrategy(bp));
* XXX
*/
return -1;
}
#endif
int
wdsize(dev_t dev)
{
struct disk *du;
int lunit;
lunit = dkunit(dev);
if (lunit >= NWD || dktype(dev) != 0)
return (-1);
du = wddrives[lunit];
if (du == NULL)
return (-1);
return (dssize(dev, &du->dk_slices, wdopen, wdclose));
}
/*
* Dump core after a system crash.
*/
int
wddump(dev_t dev)
{
register struct disk *du;
struct disklabel *lp;
long num; /* number of sectors to write */
int lunit, part;
long blkoff, blknum;
long blkchk, blkcnt, blknext;
long cylin, head, sector;
long secpertrk, secpercyl, nblocks;
u_long ds_offset;
char *addr;
static int wddoingadump = 0;
/* Toss any characters present prior to dump. */
while (cncheckc() != -1)
;
/* Check for acceptable device. */
/* XXX should reset to maybe allow du->dk_state < OPEN. */
lunit = dkunit(dev); /* eventually support floppies? */
part = dkpart(dev);
if (lunit >= NWD || (du = wddrives[lunit]) == NULL
|| du->dk_state < OPEN
|| (lp = dsgetlabel(dev, du->dk_slices)) == NULL)
return (ENXIO);
/* Size of memory to dump, in disk sectors. */
num = (u_long)Maxmem * PAGE_SIZE / du->dk_dd.d_secsize;
secpertrk = du->dk_dd.d_nsectors;
secpercyl = du->dk_dd.d_secpercyl;
nblocks = lp->d_partitions[part].p_size;
blkoff = lp->d_partitions[part].p_offset;
/* XXX */
ds_offset = du->dk_slices->dss_slices[dkslice(dev)].ds_offset;
blkoff += ds_offset;
#if 0
pg("part %x, nblocks %d, dumplo %d num %d\n",
part, nblocks, dumplo, num);
#endif
/* Check transfer bounds against partition size. */
if (dumplo < 0 || dumplo + num > nblocks)
return (EINVAL);
/* Check if we are being called recursively. */
if (wddoingadump)
return (EFAULT);
#if 0
/* Mark controller active for if we panic during the dump. */
wdtab[du->dk_ctrlr].b_active = 1;
#endif
wddoingadump = 1;
/* Recalibrate the drive. */
DELAY(5); /* ATA spec XXX NOT */
if (wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) != 0
|| wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) != 0
|| wdsetctlr(du) != 0) {
wderror((struct buf *)NULL, du, "wddump: recalibrate failed");
return (EIO);
}
du->dk_flags |= DKFL_SINGLE;
addr = (char *) 0;
blknum = dumplo + blkoff;
while (num > 0) {
blkcnt = num;
if (blkcnt > MAXTRANSFER)
blkcnt = MAXTRANSFER;
/* Keep transfer within current cylinder. */
if ((blknum + blkcnt - 1) / secpercyl != blknum / secpercyl)
blkcnt = secpercyl - (blknum % secpercyl);
blknext = blknum + blkcnt;
/*
* See if one of the sectors is in the bad sector list
* (if we have one). If the first sector is bad, then
* reduce the transfer to this one bad sector; if another
* sector is bad, then reduce reduce the transfer to
* avoid any bad sectors.
*/
if (du->dk_flags & DKFL_SINGLE
&& dsgetbad(dev, du->dk_slices) != NULL) {
for (blkchk = blknum; blkchk < blknum + blkcnt; blkchk++) {
daddr_t blknew;
blknew = transbad144(dsgetbad(dev, du->dk_slices),
blkchk - ds_offset) + ds_offset;
if (blknew != blkchk) {
/* Found bad block. */
blkcnt = blkchk - blknum;
if (blkcnt > 0) {
blknext = blknum + blkcnt;
goto out;
}
blkcnt = 1;
blknext = blknum + blkcnt;
#if 1 || defined(WDDEBUG)
printf("bad block %lu -> %lu\n",
blknum, blknew);
#endif
break;
}
}
}
out:
/* Compute disk address. */
cylin = blknum / secpercyl;
head = (blknum % secpercyl) / secpertrk;
sector = blknum % secpertrk;
#if 0
/* Let's just talk about this first... */
pg("cylin l%d head %ld sector %ld addr 0x%x count %ld",
cylin, head, sector, addr, blkcnt);
#endif
/* Do the write. */
if (wdcommand(du, cylin, head, sector, blkcnt, WDCC_WRITE)
!= 0) {
wderror((struct buf *)NULL, du,
"wddump: timeout waiting to to give command");
return (EIO);
}
while (blkcnt != 0) {
if (is_physical_memory((vm_offset_t)addr))
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
trunc_page(addr), VM_PROT_READ, TRUE);
else
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
trunc_page(0), VM_PROT_READ, TRUE);
/* Ready to send data? */
DELAY(5); /* ATA spec */
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ, TIMEOUT)
< 0) {
wderror((struct buf *)NULL, du,
"wddump: timeout waiting for DRQ");
return (EIO);
}
if (du->dk_flags & DKFL_32BIT)
outsl(du->dk_port + wd_data,
CADDR1 + ((int)addr & PAGE_MASK),
DEV_BSIZE / sizeof(long));
else
outsw(du->dk_port + wd_data,
CADDR1 + ((int)addr & PAGE_MASK),
DEV_BSIZE / sizeof(short));
addr += DEV_BSIZE;
/*
* If we are dumping core, it may take a while.
* So reassure the user and hold off any watchdogs.
*/
if ((unsigned)addr % (1024 * 1024) == 0) {
#ifdef HW_WDOG
if (wdog_tickler)
(*wdog_tickler)();
#endif /* HW_WDOG */
printf("%ld ", num / (1024 * 1024 / DEV_BSIZE));
}
num--;
blkcnt--;
}
/* Wait for completion. */
DELAY(5); /* ATA spec XXX NOT */
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) < 0) {
wderror((struct buf *)NULL, du,
"wddump: timeout waiting for status");
return (EIO);
}
/* Check final status. */
if (du->dk_status
& (WDCS_READY | WDCS_SEEKCMPLT | WDCS_DRQ | WDCS_ERR)
!= (WDCS_READY | WDCS_SEEKCMPLT)) {
wderror((struct buf *)NULL, du,
"wddump: extra DRQ, or error");
return (EIO);
}
/* Update block count. */
blknum = blknext;
/* Operator aborting dump? */
if (cncheckc() != -1)
return (EINTR);
}
return (0);
}
static void
wderror(struct buf *bp, struct disk *du, char *mesg)
{
if (bp == NULL)
printf("wd%d: %s:\n", du->dk_lunit, mesg);
else
diskerr(bp, "wd", mesg, LOG_PRINTF, du->dk_skip,
dsgetlabel(bp->b_dev, du->dk_slices));
printf("wd%d: status %b error %b\n", du->dk_lunit,
du->dk_status, WDCS_BITS, du->dk_error, WDERR_BITS);
}
/*
* Discard any interrupts that were latched by the interrupt system while
* we were doing polled i/o.
*/
static void
wdflushirq(struct disk *du, int old_ipl)
{
#ifdef CMD640
wdtab[du->dk_ctrlr_cmd640].b_active = 2;
splx(old_ipl);
(void)splbio();
wdtab[du->dk_ctrlr_cmd640].b_active = 0;
#else
wdtab[du->dk_ctrlr].b_active = 2;
splx(old_ipl);
(void)splbio();
wdtab[du->dk_ctrlr].b_active = 0;
#endif
}
/*
* Reset the controller.
*/
static int
wdreset(struct disk *du)
{
int err = 0;
if ((du->dk_flags & (DKFL_DMA|DKFL_USEDMA)) && du->dk_dmacookie)
wddma[du->dk_interface].wdd_dmadone(du->dk_dmacookie);
(void)wdwait(du, 0, TIMEOUT);
outb(du->dk_altport, WDCTL_IDS | WDCTL_RST);
DELAY(10 * 1000);
outb(du->dk_altport, WDCTL_IDS);
#ifdef ATAPI
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) != 0)
err = 1; /* no IDE drive found */
du->dk_error = inb(du->dk_port + wd_error);
if (du->dk_error != 0x01)
err = 1; /* the drive is incompatible */
#else
if (wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) != 0) {
printf("wdreset: error1: 0x%x\n", du->dk_error);
return (1);
}
#endif
outb(du->dk_altport, WDCTL_4BIT);
return (err);
}
/*
* 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)
{
int s = splbio();
#ifdef CMD640
if (eide_quirks & Q_CMD640B)
ctrlr = PRIMARY;
#endif
while (wdtab[ctrlr].b_active)
tsleep((caddr_t)&wdtab[ctrlr].b_active, PZERO - 1, wmesg, 1);
splx(s);
}
static void
wdtimeout(void *cdu)
{
struct disk *du;
int x;
static int timeouts;
du = (struct disk *)cdu;
x = splbio();
if (du->dk_timeout != 0 && --du->dk_timeout == 0) {
if(timeouts++ <= 5) {
char *msg;
msg = (timeouts > 5) ?
"Last time I say: interrupt timeout. Probably a portable PC." :
"interrupt timeout";
wderror((struct buf *)NULL, du, msg);
if (du->dk_dmacookie)
printf("wd%d: wdtimeout() DMA status %b\n",
du->dk_lunit,
wddma[du->dk_interface].wdd_dmastatus(du->dk_dmacookie),
WDDS_BITS);
}
wdunwedge(du);
wdflushirq(du, x);
du->dk_skip = 0;
du->dk_flags |= DKFL_SINGLE;
wdstart(du->dk_ctrlr);
}
timeout(wdtimeout, cdu, hz);
splx(x);
}
/*
* Reset the controller after it has become wedged. This is different from
* wdreset() so that wdreset() can be used in the probe and so that this
* can restore the geometry .
*/
static int
wdunwedge(struct disk *du)
{
struct disk *du1;
int lunit;
/* Schedule other drives for recalibration. */
for (lunit = 0; lunit < NWD; lunit++)
if ((du1 = wddrives[lunit]) != NULL && du1 != du
&& du1->dk_ctrlr == du->dk_ctrlr
&& du1->dk_state > WANTOPEN)
du1->dk_state = WANTOPEN;
DELAY(RECOVERYTIME);
if (wdreset(du) == 0) {
/*
* XXX - recalibrate current drive now because some callers
* aren't prepared to have its state change.
*/
if (wdcommand(du, 0, 0, 0, 0, WDCC_RESTORE | WD_STEP) == 0
&& wdwait(du, WDCS_READY | WDCS_SEEKCMPLT, TIMEOUT) == 0
&& wdsetctlr(du) == 0)
return (0);
}
wderror((struct buf *)NULL, du, "wdunwedge failed");
return (1);
}
/*
* Wait uninterruptibly until controller is not busy and either certain
* status bits are set or an error has occurred.
* The wait is usually short unless it is for the controller to process
* an entire critical command.
* Return 1 for (possibly stale) controller errors, -1 for timeout errors,
* or 0 for no errors.
* Return controller status in du->dk_status and, if there was a controller
* error, return the error code in du->dk_error.
*/
#ifdef WD_COUNT_RETRIES
static int min_retries[NWDC];
#endif
static int
wdwait(struct disk *du, u_char bits_wanted, int timeout)
{
int wdc;
u_char status;
#define POLLING 1000
wdc = du->dk_port;
timeout += POLLING;
/*
* This delay is really too long, but does not impact the performance
* as much when using the multi-sector option. Shorter delays have
* caused I/O errors on some drives and system configs. This should
* probably be fixed if we develop a better short term delay mechanism.
*/
DELAY(1);
do {
#ifdef WD_COUNT_RETRIES
if (min_retries[du->dk_ctrlr] > timeout
|| min_retries[du->dk_ctrlr] == 0)
min_retries[du->dk_ctrlr] = timeout;
#endif
du->dk_status = status = inb(wdc + wd_status);
#ifdef ATAPI
/*
* Atapi drives have a very interesting feature, when attached
* as a slave on the IDE bus, and there is no master.
* They release the bus after getting the command.
* We should reselect the drive here to get the status.
*/
if (status == 0xff) {
outb(wdc + wd_sdh, WDSD_IBM | du->dk_unit << 4);
du->dk_status = status = inb(wdc + wd_status);
}
#endif
if (!(status & WDCS_BUSY)) {
if (status & WDCS_ERR) {
du->dk_error = inb(wdc + wd_error);
/*
* We once returned here. This is wrong
* because the error bit is apparently only
* valid after the controller has interrupted
* (e.g., the error bit is stale when we wait
* for DRQ for writes). So we can't depend
* on the error bit at all when polling for
* command completion.
*/
}
if ((status & bits_wanted) == bits_wanted) {
return (status & WDCS_ERR);
}
}
if (timeout < TIMEOUT)
/*
* Switch to a polling rate of about 1 KHz so that
* the timeout is almost machine-independent. The
* controller is taking a long time to respond, so
* an extra msec won't matter.
*/
DELAY(1000);
else
DELAY(1);
} while (--timeout != 0);
return (-1);
}
static wd_devsw_installed = 0;
static void wd_drvinit(void *unused)
{
if( ! wd_devsw_installed ) {
bdevsw_add_generic(BDEV_MAJOR,CDEV_MAJOR, &wd_bdevsw);
wd_devsw_installed = 1;
}
}
SYSINIT(wddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,wd_drvinit,NULL)
#endif /* NWDC > 0 */
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