Date: Wed, 30 Jul 1997 14:20:44 +0200 (MEST) From: Søren Schmidt <sos@sos.freebsd.dk> To: dmaddox@scsn.net Cc: dmaddox@scsn.net, cgull@smoke.marlboro.vt.us, doogie@forbidden-donut.anet-stl.com, freebsd-current@FreeBSD.ORG Subject: Re: code talks: announcing EIDE bus master patches Message-ID: <199707301220.OAA02238@sos.freebsd.dk> In-Reply-To: <19970730081733.55871@scsn.net> from "Donald J. Maddox" at "Jul 30, 97 08:17:33 am"
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In reply to Donald J. Maddox who wrote:
> > >
> > > Yes, as stated in the commit etc, you need to set the flags to 0xa0ffa0ff
> > > to get DMA support (if the drive and controller supports it).
> > >
> > > > wdc0 at 0x1f0-0x1f7 irq 14 flags 0x80ff80ff on isa
> > > ^^^^^^^^^^
> > > > wdc1 at 0x170-0x177 irq 15 flags 0x80ff80ff on isa
> > > ^^^^^^^^^^
> > > > wdc1: unit 0 (atapi): <V004H0DT B/4V001-4.>, removable, iordy
> > >
> > Geez, how did I miss that? Thanks for the info :-)
>
> Well, apparently, that's not the whole story:
Yes it is, and you have DMA support:
> wdc0 at 0x1f0-0x1f7 irq 14 flags 0xa0ffa0ff on isa
> wdc0: unit 0 (wd0): <Maxtor 71336 AP>, DMA, 32-bit, multi-block-32
^^^
> wd0: 1277MB (2615760 sectors), 2595 cyls, 16 heads, 63 S/T, 512 B/S
see??
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Søren Schmidt (sos@FreeBSD.org) FreeBSD Core Team
Even more code to hack -- will it ever end
..
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