From: Johannes Erdfelt <johannes@erdfelt.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Determine if card is in 32 or 64 bit PCI slot?
Date: Wed, 8 Aug 2001 16:59:19 -0400 [thread overview]
Message-ID: <20010808165919.R21901@sventech.com> (raw)
In-Reply-To: <20010808161703.Q21901@sventech.com> <E15UaNj-00062K-00@the-village.bc.nu>
In-Reply-To: <E15UaNj-00062K-00@the-village.bc.nu>; from alan@lxorguk.ukuu.org.uk on Wed, Aug 08, 2001 at 09:56:47PM +0100
On Wed, Aug 08, 2001, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> > I have a 64 bit PCI card which will work in either a 32 bit or 64 bit
> > PCI slot.
> >
> > I'd like to make the driver autodetect which kind of slot the card is
> > in and set the dma_mask correctly, but I can't seem to figure out how to
> > do this.
>
> Are you sure the card actually needs this. Most such cards support dual address
> cycle, so when placed in a 32bit slot will still do 64bit DMA
No I don't know if it's needed. I had no idea that PCI could do that.
Is dual address cycle mandated by the PCI specs?
JE
next prev parent reply other threads:[~2001-08-08 20:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-08 20:17 Determine if card is in 32 or 64 bit PCI slot? Johannes Erdfelt
2001-08-08 20:56 ` Alan Cox
2001-08-08 20:59 ` Johannes Erdfelt [this message]
2001-08-14 15:55 ` Jes Sorensen
2001-08-14 16:29 ` Johannes Erdfelt
2001-08-09 18:44 ` disappearing cdrom on reboot with 2.4.7-ac10 David Flood
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20010808165919.R21901@sventech.com \
--to=johannes@erdfelt.com \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox