From: [email protected]
Date: Wed, 27 Sep 2006 15:15:37 -0700
> Subject: msi: refactor and move the msi irq_chip into the arch code
> From: "Eric W. Biederman" <[email protected]>
>
> It turns out msi_ops was simply not enough to abstract the architecture
> specific details of msi. So I have moved the resposibility of constructing
> the struct irq_chip to the architectures, and have two architecture specific
> functions arch_setup_msi_irq, and arch_teardown_msi_irq.
>
> For simple architectures those functions can do all of the work. For
> architectures with platform dependencies they can call into the appropriate
> platform code.
>
> With this msi.c is finally free of assuming you have an apic, and this
> actually takes less code.
>
> The helpers for the architecture specific code are declared in the linux/msi.h
> to keep them separate from the msi functions used by drivers in linux/pci.h
>
> Signed-off-by: Eric W. Biederman <[email protected]>
> Cc: Ingo Molnar <[email protected]>
> Cc: Tony Luck <[email protected]>
> Cc: Andi Kleen <[email protected]>
> Cc: Thomas Gleixner <[email protected]>
> Cc: Greg KH <[email protected]>
> Cc: Benjamin Herrenschmidt <[email protected]>
> Signed-off-by: Andrew Morton <[email protected]>
Eric, thanks so much for doing this work.
Once this goes in I'll try to add support for MSI on sparc64
Niagara boxes. I suppose the PowerPC folks can make use of
this as well.
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