Commit df87ef55 authored by Michael Ellerman's avatar Michael Ellerman Committed by Paul Mackerras
Browse files

[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: default avatarMichael Ellerman <>
Signed-off-by: default avatarPaul Mackerras <>
parent f728b5c3
......@@ -682,6 +682,7 @@ config PCI
&& !PPC_85xx && !PPC_86xx
default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
default PCI_QSPAN if !4xx && !CPM2 && 8xx
Find out whether your system includes a PCI bus. PCI is the name of
a bus system, i.e. the way the CPU talks to the other stuff inside
......@@ -68,6 +68,7 @@ obj-$(CONFIG_MODULES) += $(module-y)
pci64-$(CONFIG_PPC64) += pci_64.o pci_dn.o
pci32-$(CONFIG_PPC32) := pci_32.o
obj-$(CONFIG_PCI) += $(pci64-y) $(pci32-y)
obj-$(CONFIG_PCI_MSI) += msi.o
kexec-$(CONFIG_PPC64) := machine_kexec_64.o
kexec-$(CONFIG_PPC32) := machine_kexec_32.o
obj-$(CONFIG_KEXEC) += machine_kexec.o crash.o $(kexec-y)
* 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);
......@@ -120,6 +120,14 @@ struct machdep_calls {
/* To setup PHBs when using automatic OF platform driver for PCI */
int (*pci_setup_phb)(struct pci_controller *host);
int (*msi_check_device)(struct pci_dev* dev,
int nvec, int type);
int (*setup_msi_irqs)(struct pci_dev *dev,
int nvec, int type);
void (*teardown_msi_irqs)(struct pci_dev *dev);
void (*restart)(char *cmd);
void (*power_off)(void);
void (*halt)(void);
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