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PCI MSI: Define PCI_MSI_MASK_32/64

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Impact: cleanup, improve readability

Define PCI_MSI_MASK_32/64 for 32/64bit devices, instead of using
implicit offset (-4), "PCI_MSI_MASK_BIT - 4" and "PCI_MSI_MASK_BIT".

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Hidetoshi Seto
2009-04-20 10:54:59 +09:00
committed by Jesse Barnes
parent 64f039d3d7
commit 67b5db6502
3 changed files with 6 additions and 5 deletions
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3
include/linux/pci_regs.h
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@ -295,8 +295,9 @@
#define PCI_MSI_ADDRESS_LO 4 /* Lower 32 bits */
#define PCI_MSI_ADDRESS_HI 8 /* Upper 32 bits (if PCI_MSI_FLAGS_64BIT set) */
#define PCI_MSI_DATA_32 8 /* 16 bits of data for 32-bit devices */
#define PCI_MSI_MASK_32 12 /* Mask bits register for 32-bit devices */
#define PCI_MSI_DATA_64 12 /* 16 bits of data for 64-bit devices */
#define PCI_MSI_MASK_BIT 16 /* Mask bits register */
#define PCI_MSI_MASK_64 16 /* Mask bits register for 64-bit devices */
/* MSI-X registers (these are at offset PCI_MSIX_FLAGS) */
#define PCI_MSIX_FLAGS 2