[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>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/asm-powerpc/machdep.h b/include/asm-powerpc/machdep.h
index daa08b1c2121..6cf1a831f550 100644
--- a/include/asm-powerpc/machdep.h
+++ b/include/asm-powerpc/machdep.h
@@ -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);
 
+#ifdef CONFIG_PCI_MSI
+        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);
+#endif
+
         void            (*restart)(char *cmd);
         void            (*power_off)(void);
         void            (*halt)(void);