Commit 491b98c3 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
Browse files

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: default avatarBenjamin Herrenschmidt <>
parent 09c188c4
......@@ -213,6 +213,9 @@ struct machdep_calls {
* allow assignment/enabling of the device. */
int (*pcibios_enable_device_hook)(struct pci_dev *);
/* Called after scan and before resource survey */
void (*pcibios_fixup_phb)(struct pci_controller *hose);
/* Called to shutdown machine specific hardware not already controlled
* by other drivers.
......@@ -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)
/* Configure PCI Express settings */
if (bus && !pci_has_flag(PCI_PROBE_ONLY)) {
struct pci_bus *child;
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