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authorEric W. Biederman <ebiederm@xmission.com>2006-10-04 02:16:33 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-04 07:55:27 -0700
commit0366f8f7137deb072991e4c50769c6da31f8940c (patch)
tree11cb801b0fe9bc1742f1c47716a7d815b9d98dee /include
parentdd159eeca971d594fa30176733b66d37acda82a3 (diff)
[PATCH] genirq: msi: implement helper functions read_msi_msg and write_msi_msg
In support of this I also add a struct msi_msg that captures the the two address and one data field ina typical msi message, and I remember the pos and if the address is 64bit in struct msi_desc. This makes the code a little more readable and easier to maintain, and paves the way to further simplfications. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rajesh Shah <rajesh.shah@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/pci.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 4431ce4e1e6..b9bb6c46e05 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -595,6 +595,12 @@ struct msix_entry {
u16 entry; /* driver uses to specify entry, OS writes */
};
+struct msi_msg {
+ u32 address_lo; /* low 32 bits of msi message address */
+ u32 address_hi; /* high 32 bits of msi message address */
+ u32 data; /* 16 bits of msi message data */
+};
+
#ifndef CONFIG_PCI_MSI
static inline void pci_scan_msi_device(struct pci_dev *dev) {}
static inline int pci_enable_msi(struct pci_dev *dev) {return -1;}