From 5350ab3fd794f899079d9f6b2b6fe1a7917087ef Mon Sep 17 00:00:00 2001 From: Wei Yang Date: Wed, 25 Mar 2015 16:23:56 +0800 Subject: powerpc/powernv: Implement pcibios_iov_resource_alignment() on powernv Implement pcibios_iov_resource_alignment() on powernv platform. On PowerNV platform, there are 3 cases for the IOV BAR: 1. initial state, the IOV BAR size is multiple times of VF BAR size 2. after expanded, the IOV BAR size is expanded to meet the M64 segment size 3. sizing stage, the IOV BAR is truncated to 0 pnv_pci_iov_resource_alignment() handle these three cases respectively. [bhelgaas: adjust to drop "align" parameter, return pci_iov_resource_size() if no ppc_md machdep_call version] Signed-off-by: Wei Yang Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/powernv/pci-ioda.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'arch/powerpc/platforms') diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 1da45aa76a03..217eaad23cde 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1965,6 +1965,25 @@ static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus, return phb->ioda.io_segsize; } +#ifdef CONFIG_PCI_IOV +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; + + align = pci_iov_resource_size(pdev, resno); + if (pdn->vfs_expanded) + return pdn->vfs_expanded * align; + + return align; +} +#endif /* CONFIG_PCI_IOV */ + /* Prevent enabling devices for which we couldn't properly * assign a PE */ @@ -2164,6 +2183,7 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np, ppc_md.pcibios_reset_secondary_bus = pnv_pci_reset_secondary_bus; #ifdef CONFIG_PCI_IOV ppc_md.pcibios_fixup_sriov = pnv_pci_ioda_fixup_iov_resources; + ppc_md.pcibios_iov_resource_alignment = pnv_pci_iov_resource_alignment; #endif /* CONFIG_PCI_IOV */ pci_add_flags(PCI_REASSIGN_ALL_RSRC); -- cgit v1.2.3