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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 <benh@kernel.crashing.org>
parent 09c188c4

arch/powerpc/include/asm/machdep.h

+3 −0
Original line number Diff line number Diff line
@@ -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.

	 */

arch/powerpc/kernel/pci-common.c

+6 −0
Original line number Diff line number Diff line
@@ -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;