On Thu, Aug 13, 2015 at 10:11:07PM +0800, Wei Yang wrote:
>The alignment of IOV BAR on PowerNV platform is the total size of the IOV
>BAR. No matter whether the IOV BAR is extended with number of
>roundup_pow_of_two(total_vfs) or number of max PE number (256), the total
>size could be calculated by (vfs_expanded * VF_BAR_size).
>
>This patch simplifies the pnv_pci_iov_resource_alignment() by removing the
>first case.
>
>Signed-off-by: Wei Yang <weiy...@linux.vnet.ibm.com>
>Reviewed-by: Gavin Shan <gws...@linux.vnet.ibm.com>
>---
> arch/powerpc/platforms/powernv/pci-ioda.c | 14 +++++++++-----
> 1 file changed, 9 insertions(+), 5 deletions(-)
>
>diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c
>b/arch/powerpc/platforms/powernv/pci-ioda.c
>index 9ac324e..67b8f72 100644
>--- a/arch/powerpc/platforms/powernv/pci-ioda.c
>+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
>@@ -2987,12 +2987,16 @@ static resource_size_t
>pnv_pci_iov_resource_alignment(struct pci_dev *pdev,
> int resno)
> {
> struct pci_dn *pdn = pci_get_pdn(pdev);
>- resource_size_t align, iov_align;
>-
>- iov_align = resource_size(&pdev->resource[resno]);
>- if (iov_align)
>- return iov_align;
>+ resource_size_t align;
>
>+ /*
>+ * On PowerNV platform, IOV BAR is mapped by M64 BAR to enable the
>+ * SR-IOV. While from hardware perspective, the range mapped by M64
>+ * BAR should be size aligned.
>+ *
>+ * This function return the total IOV BAR size if expanded or just the
>+ * individual size if not.
>+ */
s/return/returns
> align = pci_iov_resource_size(pdev, resno);
> if (pdn->vfs_expanded)
> return pdn->vfs_expanded * align;
>--
>1.7.9.5
>
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