From 0366f8f7137deb072991e4c50769c6da31f8940c Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Wed, 4 Oct 2006 02:16:33 -0700 Subject: [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 Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Benjamin Herrenschmidt Cc: Rajesh Shah Cc: Andi Kleen Cc: "Protasevich, Natalie" Cc: "Luck, Tony" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/pci.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/pci.h b/include/linux/pci.h index 4431ce4e1e6f..b9bb6c46e056 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;} -- cgit v1.2.2