powerpc/pci: Add a platform hook after probe and before resource survey

Some platforms need to perform resource allocation using a custom algorithm
due to HW constraints, or may want to tweak things globally below a host
bridge. For example OPAL support for IODA will need to perform a
resource allocation pass that applies IODA specific segmentation
constraints to MMIO which cannot be done simply using the kernel generic
resource management code.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 458ed3bee663..f5b753de3718 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1732,6 +1732,12 @@ void __devinit pcibios_scan_phb(struct pci_controller *hose)
         if (mode == PCI_PROBE_NORMAL)
                 hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
 
+        /* Platform gets a chance to do some global fixups before
+         * we proceed to resource allocation
+         */
+        if (ppc_md.pcibios_fixup_phb)
+                ppc_md.pcibios_fixup_phb(hose);
+
         /* Configure PCI Express settings */
         if (bus && !pci_has_flag(PCI_PROBE_ONLY)) {
                 struct pci_bus *child;