On powrnv platform, resource position in M64 implies the PE# the resource belongs to. In some particular case, adjustment of a resource is necessary to locate it to a correct position in M64. This patch introduce a function to shift the 'real' VF BAR address according to an offset. Signed-off-by: Wei Yang <weiyang@xxxxxxxxxxxxxxxxxx> --- arch/powerpc/platforms/powernv/pci-ioda.c | 31 +++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 3aeb87b..18e2917 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -14,6 +14,7 @@ #include <linux/kernel.h> #include <linux/pci.h> #include <linux/crash_dump.h> +#include <linux/pci_regs.h> #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/string.h> @@ -730,6 +731,36 @@ static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev) return 10; } +#ifdef CONFIG_PCI_IOV +static void pnv_pci_vf_resource_shift(struct pci_dev *dev, int offset) +{ + struct pci_dn *pdn = pci_get_pdn(dev); + int i; + struct resource *res; + resource_size_t size; + + if (!dev->is_physfn) + return; + + for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { + res = dev->resource + PCI_IOV_RESOURCES + i; + if (!res->flags || !res->parent) + continue; + + if (!pnv_pci_is_mem_pref_64(res->flags)) + continue; + + dev_info(&dev->dev, "PowerNV: Shifting VF BAR %pR to\n", res); + size = pnv_pci_sriov_resource_size(dev, PCI_IOV_RESOURCES + i); + res->start += size*offset; + + dev_info(&dev->dev, " %pR\n", res); + pci_update_resource(dev, PCI_IOV_RESOURCES + i); + } + pdn->vfs -= offset; +} +#endif /* CONFIG_PCI_IOV */ + #if 0 static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev) { -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html