From: Grant Grundler <grundler@parisc-linux.org>
To: Mark Hounschell <markh@compro.net>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux-pci@vger.kernel.org, Mark Hounschell <dmarkh@cfl.rr.com>,
linux-kernel@vger.kernel.org
Subject: Re: problems doing direct dma from a pci device to pci-e device
Date: Sun, 13 Sep 2009 23:36:10 -0600 [thread overview]
Message-ID: <20090914053610.GA5970@lackof.org> (raw)
In-Reply-To: <4AAAAD30.4040704@compro.net>
On Fri, Sep 11, 2009 at 04:04:00PM -0400, Mark Hounschell wrote:
> A quick readup on the IOMMU makes me think that if it does use one, that
> could certainly cause my problem. I'm using bus addresses plugged into
> page tables that live in the gpiohsd card obtained from virt2bus.
If you haven't yet, take a look at Documentation/DMA-API.txt and
DMA-mapping.txt . virt2bus has been deprecated for DMA since 2.4 releases.
grant
next prev parent reply other threads:[~2009-09-14 5:36 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-11 14:13 problems doing direct dma from a pci device to pci-e device Mark Hounschell
2009-09-11 14:41 ` Richard B. Johnson
2009-09-11 14:50 ` Mark Hounschell
2009-09-11 14:47 ` Alan Cox
2009-09-11 15:25 ` Mark Hounschell
2009-09-11 15:46 ` Richard B. Johnson
2009-09-11 19:42 ` Mark Hounschell
2009-09-11 20:04 ` Mark Hounschell
2009-09-14 5:36 ` Grant Grundler [this message]
2009-09-14 8:03 ` Mark Hounschell
2009-09-15 11:23 ` Mark Hounschell
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=20090914053610.GA5970@lackof.org \
--to=grundler@parisc-linux.org \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=dmarkh@cfl.rr.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=markh@compro.net \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.