From: Jochen Friedrich <jochen@scram.de>
To: Jesse Barnes <jbarnes@sgi.com>
Cc: Grant Grundler <grundler@parisc-linux.org>,
linux-kernel@vger.kernel.org, jeremy@sgi.com,
Matthew Wilcox <willy@debian.org>,
linux-pci@atrey.karlin.mff.cuni.cz, Jame.Bottomley@steeleye.com
Subject: Re: [RFC] Relaxed PIO read vs. DMA write ordering
Date: Fri, 9 Jan 2004 08:39:28 +0100 (CET) [thread overview]
Message-ID: <Pine.LNX.4.58.0401090833480.4454@localhost> (raw)
In-Reply-To: <20040108173655.GA11168@sgi.com>
Hi Jesse,
> > BTW, Jesse, did you look at part II of Documentation/DMA-ABI.txt?
>
> I remember seeing discussion of the new API, but haven't read that doc
> yet. Since most drivers still use the pci_* API, we'd have to add a
> call there, but we may as well make the two APIs as similar as possible
> right?
And there are reasons for drivers still using the pci_* API. In tms380tr,
i support both PCI and ISA cards. The pci_* API supports mapping ISA cards
for bus master DMA by passing a NULL for pdev. The new API still fails
because of the BUG_ON(dev->bus != &pci_bus_type). Unfortunately, on 64 bit
platforms like Alpha, the mapping is required to set up the IOMMU.
--jochen
next prev parent reply other threads:[~2004-01-09 7:41 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-07 17:58 [RFC] Relaxed PIO read vs. DMA write ordering Jesse Barnes
2004-01-07 19:02 ` Matthew Wilcox
2004-01-07 22:21 ` Grant Grundler
2004-01-07 23:07 ` Jesse Barnes
2004-01-07 23:27 ` Greg KH
2004-01-07 23:56 ` Jesse Barnes
2004-01-08 0:34 ` Jesse Barnes
2004-01-08 0:08 ` Jeremy Higdon
2004-01-08 10:01 ` Jes Sorensen
2004-01-08 6:38 ` Grant Grundler
2004-01-08 16:23 ` Leonid Grossman
2004-01-08 17:39 ` Jesse Barnes
2004-01-08 17:54 ` Christoph Hellwig
2004-01-08 19:48 ` Leonid Grossman
2004-01-08 17:36 ` Jesse Barnes
2004-01-08 18:44 ` Grant Grundler
2004-01-09 7:13 ` Jeremy Higdon
2004-01-09 19:51 ` Jesse Barnes
2004-01-09 23:15 ` Jesse Barnes
2004-01-09 20:02 ` Grant Grundler
2004-01-11 14:34 ` James Bottomley
2004-01-09 7:39 ` Jochen Friedrich [this message]
2004-01-09 20:27 ` Grant Grundler
2004-01-09 22:12 ` Ivan Kokshaysky
2004-01-07 22:58 ` Jesse Barnes
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=Pine.LNX.4.58.0401090833480.4454@localhost \
--to=jochen@scram.de \
--cc=Jame.Bottomley@steeleye.com \
--cc=grundler@parisc-linux.org \
--cc=jbarnes@sgi.com \
--cc=jeremy@sgi.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@atrey.karlin.mff.cuni.cz \
--cc=willy@debian.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