From: Olof Johansson <olof@lixom.net>
To: michael@ellerman.id.au
Cc: linux-pci@atrey.karlin.mff.cuni.cz,
Paul Mackerras <paulus@samba.org>,
linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 6/9] MPIC MSI allocator
Date: Wed, 13 Dec 2006 19:06:59 -0600 [thread overview]
Message-ID: <20061213190659.7922c15e@pb15> (raw)
In-Reply-To: <1166057940.6838.25.camel@concordia.ozlabs.ibm.com>
On Thu, 14 Dec 2006 11:59:00 +1100 Michael Ellerman <michael@ellerman.id.au> wrote:
> Nah I didn't make it U3/U4 specific, although I could. If we do that,
> then I think the logic needs to be:
>
> if get_property("msi_available")
> mpic_msi_reserve_dt_irqs()
> elif is_u3_or_u4()
> mpic_msi_reserve_u3u4_irqs()
> else
> return error
>
> Because if we don't have a firmware property, and we don't make an
> educated guess at what's reserved, then there's a very good chance our
> first MSI will get hwirq 0 and that it won't work.
Looks like a good solution to me.
> As far as putting hacks in the MPIC driver .. have you read it
> lately? ;) But seriously, I think if there's anyway these magic numbers
> should be, it is in this code, not the platform code.
It used to be fairly OK, but the TSI merge really pushed it over the
edge, obfuscation-wise. :(
But that's no excuse to make it worse than it has to be.
-Olof
next prev parent reply other threads:[~2006-12-14 1:07 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-13 10:39 [PATCH 0/9] Powerpc MSI Implementation (.. again) Michael Ellerman
2006-12-13 10:39 ` [PATCH 1/9] Add #defines for Hypertransport MSI fields Michael Ellerman
2006-12-13 10:39 ` [PATCH 2/9] Rip out the existing powerpc msi stubs Michael Ellerman
2006-12-13 10:39 ` [PATCH 3/9] Powerpc MSI implementation Michael Ellerman
2006-12-13 10:39 ` [PATCH 4/9] Enable MSI on Powerpc Michael Ellerman
2006-12-13 10:39 ` [PATCH 5/9] RTAS MSI implementation Michael Ellerman
2006-12-13 10:40 ` [PATCH 6/9] MPIC MSI allocator Michael Ellerman
2006-12-13 18:23 ` Olof Johansson
2006-12-13 23:25 ` Benjamin Herrenschmidt
2006-12-14 0:09 ` Olof Johansson
2006-12-14 0:32 ` Benjamin Herrenschmidt
2006-12-14 0:59 ` Michael Ellerman
2006-12-14 1:02 ` Benjamin Herrenschmidt
2006-12-14 1:06 ` Michael Ellerman
2006-12-14 14:46 ` Segher Boessenkool
2006-12-14 19:44 ` Benjamin Herrenschmidt
2006-12-15 1:47 ` Segher Boessenkool
2006-12-15 1:51 ` Michael Ellerman
2006-12-15 2:28 ` Benjamin Herrenschmidt
2006-12-15 2:58 ` Segher Boessenkool
2006-12-15 6:42 ` Olof Johansson
2006-12-14 1:06 ` Olof Johansson [this message]
2006-12-14 0:34 ` Michael Ellerman
2006-12-13 10:40 ` [PATCH 7/9] MPIC MSI backend Michael Ellerman
2006-12-13 10:40 ` [PATCH 9/9] Enable MSI mappings for MPIC Michael Ellerman
2006-12-13 10:40 ` [PATCH 8/9] Activate MSI on Powerpc Michael Ellerman
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