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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-11-06 19:55:57 +0100
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-11-25 04:32:53 +0100
commit491b98c315dbe39b20bd4a24a6179c42349f42c0 (patch)
treed8eee6224d4f517bfcb0d3ae9ee1b24615e9bb0f /arch/powerpc/kernel/pci-common.c
parentpowerpc: Add pgprot_cached_noncoherent() (diff)
downloadlinux-491b98c315dbe39b20bd4a24a6179c42349f42c0.tar.xz
linux-491b98c315dbe39b20bd4a24a6179c42349f42c0.zip
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>
Diffstat (limited to 'arch/powerpc/kernel/pci-common.c')
-rw-r--r--arch/powerpc/kernel/pci-common.c6
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;