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linux/arch/powerpc/kernel/msi.c
Michael Ellerman df87ef5508 [POWERPC] PowerPC MSI infrastructure
This provides the architecture specific hooks to support MSI on
powerpc.  We implement the newly added arch_setup_msi_irqs() and
arch_teardown_msi_irqs(), and then delegate to ppc_md routines.

Platforms that don't implement MSI will leave the ppc_md calls blank,
arch_msi_check_device() will detect this and return ENOSYS. Drivers
should detect this error and continue to use LSI.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-05-08 13:40:31 +10:00

39 lines
981 B
C

/*
* Copyright 2006-2007, Michael Ellerman, IBM Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/msi.h>
#include <asm/machdep.h>
int arch_msi_check_device(struct pci_dev* dev, int nvec, int type)
{
if (!ppc_md.setup_msi_irqs || !ppc_md.teardown_msi_irqs) {
pr_debug("msi: Platform doesn't provide MSI callbacks.\n");
return -ENOSYS;
}
if (ppc_md.msi_check_device) {
pr_debug("msi: Using platform check routine.\n");
return ppc_md.msi_check_device(dev, nvec, type);
}
return 0;
}
int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
return ppc_md.setup_msi_irqs(dev, nvec, type);
}
void arch_teardown_msi_irqs(struct pci_dev *dev)
{
return ppc_md.teardown_msi_irqs(dev);
}