diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-11-06 18:55:57 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-11-25 14:32:53 +1100 |
| commit | 491b98c315dbe39b20bd4a24a6179c42349f42c0 (patch) | |
| tree | d8eee6224d4f517bfcb0d3ae9ee1b24615e9bb0f | |
| parent | 09c188c4f6b331dbb61a2b5bd05d4c89c733fe33 (diff) | |
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>
| -rw-r--r-- | arch/powerpc/include/asm/machdep.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/kernel/pci-common.c | 6 |
2 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h index b540d6fcedd..bf37931d1ad 100644 --- a/arch/powerpc/include/asm/machdep.h +++ b/arch/powerpc/include/asm/machdep.h @@ -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. */ diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 458ed3bee66..f5b753de371 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; |