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authorWei Yang <weiyang@linux.vnet.ibm.com>2015-03-25 16:23:50 +0800
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2015-03-31 13:02:36 +1100
commit978d2d68312326b715a5913aaab1eaf24fe99108 (patch)
tree101dc75d31df4bf5cb714014319d44f87079c70f /include/linux/pci.h
parent995df527f3990d91fe8f3d7d1917a7adc3938320 (diff)
PCI: Add pcibios_iov_resource_alignment() interface
Per the SR-IOV spec r1.1, sec 3.3.14, the required alignment of a PF's IOV BAR is the size of an individual VF BAR, and the size consumed is the individual VF BAR size times NumVFs. The PowerNV platform has additional alignment requirements to help support its Partitionable Endpoint device isolation feature (see Documentation/powerpc/pci_iov_resource_on_powernv.txt). Add a pcibios_iov_resource_alignment() interface to allow platforms to request additional alignment. [bhelgaas: changelog, adapt to reworked pci_sriov_resource_alignment(), drop "align" parameter] Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/linux/pci.h')
-rw-r--r--include/linux/pci.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 99ea94835fb6..4e1f17db1a81 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1174,6 +1174,7 @@ 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);
+resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)