From: ebiederm@xmission.com (Eric W. Biederman)
To: Matthew Wilcox <matthew@wil.cx>
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
grundler@parisc-linux.org, mingo@elte.hu, tglx@linutronix.de,
jgarzik@pobox.com, linux-ide@vger.kernel.org,
suresh.b.siddha@intel.com, benh@kernel.crashing.org,
jbarnes@virtuousgeek.org, rdunlap@xenotime.net,
mtk.manpages@gmail.com
Subject: Re: Multiple MSI, take 3
Date: Fri, 11 Jul 2008 04:34:19 -0700 [thread overview]
Message-ID: <m1iqvc7iys.fsf@frodo.ebiederm.org> (raw)
In-Reply-To: <20080711102326.GR14894@parisc-linux.org> (Matthew Wilcox's message of "Fri, 11 Jul 2008 04:23:26 -0600")
There is one idea that seems to model this cleanly
without breaking all kinds of expectations.
That is an irq with a very small data payload.
In that case we wire all of the vectors up to a single
irq handler that computes the payload as:
payload = vector - base-vector.
And then we figure out how to pass that to the handler in irqaction.
To most of the system it is a single irq so it avoids breaking
expectations about what an irq is.
To everything else it is a little odd, and has it's own unique
set of rules (which is good as well).
Eric
next prev parent reply other threads:[~2008-07-11 11:42 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-11 0:57 Multiple MSI, take 3 Matthew Wilcox
2008-07-11 0:59 ` [PATCH] PCI MSI: Replace 'type' with 'is_msix' Matthew Wilcox
2008-07-11 0:59 ` [PATCH] PCI: Add support for multiple MSI Matthew Wilcox
2008-07-11 8:28 ` Hidetoshi Seto
2008-07-11 9:45 ` Matthew Wilcox
2008-07-12 3:45 ` Benjamin Herrenschmidt
2008-07-11 1:00 ` [PATCH] Rewrite MSI-HOWTO Matthew Wilcox
2008-09-26 6:42 ` Grant Grundler
2008-07-11 1:00 ` [PATCH] AHCI: Request multiple MSIs Matthew Wilcox
2008-07-11 1:00 ` [PATCH] x86-64: Support for " Matthew Wilcox
2008-07-11 4:50 ` Kenji Kaneshige
2008-07-11 8:50 ` Matthew Wilcox
2008-07-14 1:08 ` Kenji Kaneshige
2008-07-11 10:06 ` Multiple MSI, take 3 Eric W. Biederman
2008-07-11 10:23 ` Matthew Wilcox
2008-07-11 10:32 ` David Miller
2008-07-11 10:41 ` Matthew Wilcox
2008-07-11 11:05 ` Eric W. Biederman
2008-07-11 11:34 ` Eric W. Biederman [this message]
2008-07-11 12:17 ` Matthew Wilcox
2008-07-11 15:10 ` Matthew Wilcox
2008-07-11 21:59 ` Suresh Siddha
2008-07-11 22:59 ` Eric W. Biederman
2008-07-11 23:15 ` Suresh Siddha
2008-07-11 23:59 ` Eric W. Biederman
2008-07-12 3:52 ` Benjamin Herrenschmidt
2008-07-12 4:41 ` Eric W. Biederman
2008-07-12 7:36 ` Benjamin Herrenschmidt
2008-07-13 22:30 ` Eric W. Biederman
2008-07-13 22:44 ` Benjamin Herrenschmidt
2008-07-13 23:29 ` Eric W. Biederman
2008-07-14 0:17 ` Benjamin Herrenschmidt
2008-07-14 0:44 ` David Miller
2008-07-14 2:03 ` Eric W. Biederman
2008-07-14 3:19 ` David Miller
2008-09-26 5:30 ` Jike Song
2008-09-27 19:04 ` Matthew Wilcox
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