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[PATCH] msi: refactor and move the msi irq_chip into the arch code

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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]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Eric W. Biederman 2006-10-04 02:16:59 -07:00 • committed by Linus Torvalds
commit 3b7d1921f4
13 changed files with 335 additions and 395 deletions
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20
include/asm-i386/msi.h
View file

@ -1,20 +0,0 @@
/*
* Copyright (C) 2003-2004 Intel
* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
*/
#ifndef ASM_MSI_H
#define ASM_MSI_H
#include <asm/desc.h>
#include <mach_apic.h>
extern struct msi_ops arch_msi_ops;
static inline int msi_arch_init(void)
{
msi_register(&arch_msi_ops);
return 0;
}
#endif /* ASM_MSI_H */