@@ -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>
@@ -644,6 +645,36 @@ 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 = PCI_IOV_RESOURCES; i <= PCI_IOV_RESOURCE_END; i++) {
+ res = &dev->resource[i];
+ if (!res->flags || !res->parent)
+ continue;
+
+ if (!pnv_pci_is_mem_pref_64(res->flags))
+ continue;
+
+ dev_info(&dev->dev, " Shifting VF BAR %pR to\n", res);
+ size = pci_iov_resource_size(dev, i);
+ res->start += size*offset;
+
+ dev_info(&dev->dev, " %pR\n", res);
+ pci_update_resource(dev, i);
+ }
+ pdn->max_vfs -= offset;
+}
+#endif /* CONFIG_PCI_IOV */
+
#if 0
static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev)
{
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 introduces a function to shift the 'real' PF IOV BAR address according to an offset. Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> --- arch/powerpc/platforms/powernv/pci-ioda.c | 31 +++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+)