Date: Tue, 26 Jan 1999 14:17:30 +0100 (CET) From: Søren Schmidt <sos@freebsd.dk> To: phk@FreeBSD.ORG (Poul-Henning Kamp) Cc: current@FreeBSD.ORG Subject: Re: wd0: DMA failure, DMA status 0 Message-ID: <199901261317.OAA31728@freebsd.dk> In-Reply-To: <26057.917356301@critter.freebsd.dk> from Poul-Henning Kamp at "Jan 26, 1999 2:11:41 pm"
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It seems Poul-Henning Kamp wrote:
>
>
> Is "wd0: DMA failure, DMA status 0" something which needs looked at ?
Blame Julian, he broke it in v 1.183 of wd.c, the following patch
works on all my HW, but I dont have the "cyrix" chipset Julian
made the patch for, to test it on (it also contains other small
corrections mostly from Bruce)...
Index: wd.c
===================================================================
RCS file: /home/ncvs/src/sys/i386/isa/wd.c,v
retrieving revision 1.186
diff -u -r1.186 wd.c
--- wd.c 1999/01/17 05:46:24 1.186
+++ wd.c 1999/01/19 18:29:23
@@ -1084,10 +1086,11 @@
du = wddrives[dkunit(bp->b_dev)];
/* finish off DMA */
- if (du->dk_flags & (DKFL_DMA|DKFL_USEDMA)) {
+ if ((du->dk_flags & (DKFL_DMA|DKFL_SINGLE)) == DKFL_DMA) {
/* XXX SMP boxes sometimes generate an early intr. Why? */
- if ((wddma[du->dk_interface].wdd_dmastatus(du->dk_dmacookie) & WDDS_INTERRUPT)
- != 0)
+ if ((wddma[du->dk_interface].wdd_dmastatus(du->dk_dmacookie) &
+ WDDS_INTERRUPT) == 0)
+ return;
dmastat = wddma[du->dk_interface].wdd_dmadone(du->dk_dmacookie);
}
@@ -1568,6 +1571,7 @@
if (wdwait(du, 0, TIMEOUT) < 0)
return (1);
if( command == WDCC_FEATURES) {
+ outb(wdc + wd_sdh, WDSD_IBM | (du->dk_unit << 4) | head);
outb(wdc + wd_features, count);
if ( count == WDFEA_SETXFER )
outb(wdc + wd_seccnt, sector);
@@ -2289,9 +2293,8 @@
{
int err = 0;
- if ((du->dk_flags & (DKFL_DMA|DKFL_USEDMA)) && du->dk_dmacookie)
+ if ((du->dk_flags & (DKFL_DMA|DKFL_SINGLE)) == DKFL_DMA)
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);
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