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| author | Gavin Shan <shangw@linux.vnet.ibm.com> | 2013-04-04 16:54:30 +0000 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-04-23 09:50:30 -0600 |
| commit | e375b561817d9ae098cc4296a729fc88924a0159 (patch) | |
| tree | 7cd6f54166d29a1b7c612e407d57ce79b1024610 /include | |
| parent | 703860ed4e36ded696bd44af6107243fdedfb746 (diff) | |
| download | linux-3.10-e375b561817d9ae098cc4296a729fc88924a0159.tar.gz linux-3.10-e375b561817d9ae098cc4296a729fc88924a0159.tar.bz2 linux-3.10-e375b561817d9ae098cc4296a729fc88924a0159.zip | |
PCI: Cache MSI/MSI-X capability offsets in struct pci_dev
The patch caches the MSI and MSI-X capability offset in PCI device
(struct pci_dev) so that we needn't read it from the config space
upon enabling or disabling MSI or MSI-X interrupts.
[bhelgaas: moved pm_cap size change to separate patch]
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index 9587d4d1927..b73c2460ad5 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -232,6 +232,8 @@ struct pci_dev { u8 revision; /* PCI revision, low byte of class word */ u8 hdr_type; /* PCI header type (`multi' flag masked out) */ u8 pcie_cap; /* PCI-E capability offset */ + u8 msi_cap; /* MSI capability offset */ + u8 msix_cap; /* MSI-X capability offset */ u8 pcie_mpss:3; /* PCI-E Max Payload Size Supported */ u8 rom_base_reg; /* which config register controls the ROM */ u8 pin; /* which interrupt pin this device uses */ |