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authorGavin Shan <shangw@linux.vnet.ibm.com>2012-09-12 02:59:45 +0400
committerBjorn Helgaas <bhelgaas@google.com>2012-09-12 02:59:45 +0400
commitac5ad93e92c3ffca4c7ba386aaa34244e27b7759 (patch)
tree53709126d79c3718c85fbca2ec5542aec88d4bd1 /include/linux/pci.h
parent479e0d485eaab452cf248cd1a9520015023b35b2 (diff)
downloadlinux-ac5ad93e92c3ffca4c7ba386aaa34244e27b7759.tar.xz
PCI: Add weak pcibios_window_alignment() interface
This patch implements a weak function to return the default I/O or memory window alignment for a P2P bridge. By default, I/O windows are aligned to 4KiB or 1KiB and memory windows are aligned to 4MiB. Some platforms, e.g., powernv, have special alignment requirements and can override pcibios_window_alignment(). [bhelgaas: changelog] Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include/linux/pci.h')
-rw-r--r--include/linux/pci.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b8667e0548e0..2c755243eef2 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1064,6 +1064,8 @@ int pci_cfg_space_size_ext(struct pci_dev *dev);
int pci_cfg_space_size(struct pci_dev *dev);
unsigned char pci_bus_max_busnr(struct pci_bus *bus);
void pci_setup_bridge(struct pci_bus *bus);
+resource_size_t pcibios_window_alignment(struct pci_bus *bus,
+ unsigned long type);
#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)