PCI: Add pcibios_iov_resource_alignment() interface
authorWei Yang <weiyang@linux.vnet.ibm.com>
Wed, 25 Mar 2015 08:23:50 +0000 (16:23 +0800)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Tue, 31 Mar 2015 02:02:36 +0000 (13:02 +1100)
commit978d2d68312326b715a5913aaab1eaf24fe99108
tree101dc75d31df4bf5cb714014319d44f87079c70f
parent995df527f3990d91fe8f3d7d1917a7adc3938320
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>
drivers/pci/iov.c
include/linux/pci.h