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wd->atabus->ata_bio() should handle the multi-sector PIO transfers just fine, 

and in a better way than what is done in wddump() (which also does it
for DMA transfers, limiting the dump speed significantly). So remove
code splitting transfers in wd->sc_multi chunks from wddump(), and call
wd->atabus->ata_bio() with the whole transfers.

Problem reported by Frank Kardel, and patch tested by him.
This commit is contained in:
bouyer 2005-08-29 19:05:54 +00:00
parent 57c7261a23
commit 02f20190a2
1 changed files with 56 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

122
sys/dev/ata/wd.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: wd.c,v 1.307 2005/08/26 00:09:03 briggs Exp $ */
/* $NetBSD: wd.c,v 1.308 2005/08/29 19:05:54 bouyer Exp $ */
/*
* Copyright (c) 1998, 2001 Manuel Bouyer. All rights reserved.
@ -66,7 +66,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wd.c,v 1.307 2005/08/26 00:09:03 briggs Exp $");
__KERNEL_RCSID(0, "$NetBSD: wd.c,v 1.308 2005/08/29 19:05:54 bouyer Exp $");
#ifndef ATADEBUG
#define ATADEBUG
@ -1494,7 +1494,6 @@ wdsize(dev_t dev)
/* #define WD_DUMP_NOT_TRUSTED if you just want to watch */
static int wddoingadump = 0;
static int wddumprecalibrated = 0;
static int wddumpmulti = 1;
/*
* Dump core after a system crash.
@ -1534,77 +1533,68 @@ wddump(dev_t dev, daddr_t blkno, caddr_t va, size_t size)
/* Recalibrate, if first dump transfer. */
if (wddumprecalibrated == 0) {
wddumpmulti = wd->sc_multi;
wddumprecalibrated = 1;
(*wd->atabus->ata_reset_drive)(wd->drvp,
AT_POLL | AT_RST_EMERG);
wd->drvp->state = RESET;
}
while (nblks > 0) {
wd->sc_bp = NULL;
wd->sc_wdc_bio.blkno = blkno;
wd->sc_wdc_bio.flags = ATA_POLL;
if (wd->sc_flags & WDF_LBA48 &&
(blkno > LBA48_THRESHOLD ||
(wd->sc_quirks & WD_QUIRK_FORCE_LBA48) != 0))
wd->sc_wdc_bio.flags |= ATA_LBA48;
if (wd->sc_flags & WDF_LBA)
wd->sc_wdc_bio.flags |= ATA_LBA;
wd->sc_wdc_bio.bcount =
min(nblks, wddumpmulti) * lp->d_secsize;
wd->sc_wdc_bio.databuf = va;
wd->sc_bp = NULL;
wd->sc_wdc_bio.blkno = blkno;
wd->sc_wdc_bio.flags = ATA_POLL;
if (wd->sc_flags & WDF_LBA48 &&
(blkno > LBA48_THRESHOLD ||
(wd->sc_quirks & WD_QUIRK_FORCE_LBA48) != 0))
wd->sc_wdc_bio.flags |= ATA_LBA48;
if (wd->sc_flags & WDF_LBA)
wd->sc_wdc_bio.flags |= ATA_LBA;
wd->sc_wdc_bio.bcount = nblks * lp->d_secsize;
wd->sc_wdc_bio.databuf = va;
#ifndef WD_DUMP_NOT_TRUSTED
switch (wd->atabus->ata_bio(wd->drvp, &wd->sc_wdc_bio)) {
case ATACMD_TRY_AGAIN:
panic("wddump: try again");
break;
case ATACMD_QUEUED:
panic("wddump: polled command has been queued");
break;
case ATACMD_COMPLETE:
break;
}
switch(wd->sc_wdc_bio.error) {
case TIMEOUT:
printf("wddump: device timed out");
err = EIO;
break;
case ERR_DF:
printf("wddump: drive fault");
err = EIO;
break;
case ERR_DMA:
printf("wddump: DMA error");
err = EIO;
break;
case ERROR:
printf("wddump: ");
wdperror(wd);
err = EIO;
break;
case NOERROR:
err = 0;
break;
default:
panic("wddump: unknown error type");
}
if (err != 0) {
printf("\n");
return err;
}
#else /* WD_DUMP_NOT_TRUSTED */
/* Let's just talk about this first... */
printf("wd%d: dump addr 0x%x, cylin %d, head %d, sector %d\n",
unit, va, cylin, head, sector);
delay(500 * 1000); /* half a second */
#endif
/* update block count */
nblks -= min(nblks, wddumpmulti);
blkno += min(nblks, wddumpmulti);
va += min(nblks, wddumpmulti) * lp->d_secsize;
switch (wd->atabus->ata_bio(wd->drvp, &wd->sc_wdc_bio)) {
case ATACMD_TRY_AGAIN:
panic("wddump: try again");
break;
case ATACMD_QUEUED:
panic("wddump: polled command has been queued");
break;
case ATACMD_COMPLETE:
break;
}
switch(wd->sc_wdc_bio.error) {
case TIMEOUT:
printf("wddump: device timed out");
err = EIO;
break;
case ERR_DF:
printf("wddump: drive fault");
err = EIO;
break;
case ERR_DMA:
printf("wddump: DMA error");
err = EIO;
break;
case ERROR:
printf("wddump: ");
wdperror(wd);
err = EIO;
break;
case NOERROR:
err = 0;
break;
default:
panic("wddump: unknown error type");
}
if (err != 0) {
printf("\n");
return err;
}
#else /* WD_DUMP_NOT_TRUSTED */
/* Let's just talk about this first... */
printf("wd%d: dump addr 0x%x, cylin %d, head %d, sector %d\n",
unit, va, cylin, head, sector);
delay(500 * 1000); /* half a second */
#endif
wddoingadump = 0;
return 0;