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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 /drivers/pci/msi.h
parentdd159eeca971d594fa30176733b66d37acda82a3 (diff)
downloadop-kernel-dev-0366f8f7137deb072991e4c50769c6da31f8940c.zip
op-kernel-dev-0366f8f7137deb072991e4c50769c6da31f8940c.tar.gz
[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 'drivers/pci/msi.h')
-rw-r--r--drivers/pci/msi.h9
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/pci/msi.h b/drivers/pci/msi.h
index 9b31d4c..62f61b6 100644
--- a/drivers/pci/msi.h
+++ b/drivers/pci/msi.h
@@ -130,10 +130,10 @@ struct msi_desc {
__u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */
__u8 maskbit : 1; /* mask-pending bit supported ? */
__u8 state : 1; /* {0: free, 1: busy} */
- __u8 reserved: 1; /* reserved */
+ __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
__u8 entry_nr; /* specific enabled entry */
__u8 default_vector; /* default pre-assigned vector */
- __u8 unused; /* formerly unused destination cpu*/
+ __u8 pos; /* Location of the msi capability */
}msi_attrib;
struct {
@@ -146,10 +146,7 @@ struct msi_desc {
#ifdef CONFIG_PM
/* PM save area for MSIX address/data */
-
- u32 address_hi_save;
- u32 address_lo_save;
- u32 data_save;
+ struct msi_msg msg_save;
#endif
};
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