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| author | Bjorn Helgaas <bhelgaas@google.com> | 2012-09-11 17:01:54 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-09-11 17:01:54 -0600 |
| commit | a63ab613ff48c593f4e9ace2d111978e35a202e4 (patch) | |
| tree | 067f8172d1a72625458e31869bb587eae5279b80 /arch/powerpc/kernel/pci-common.c | |
| parent | a690a4cbf09f70723f9721ca96ab8b2b472b3391 (diff) | |
| parent | 271fd03a3013b106ccc178d54219c1be0c9759b7 (diff) | |
Merge branch 'pci/gavin-window-alignment' into next
* pci/gavin-window-alignment:
powerpc/powernv: I/O and memory alignment for P2P bridges
powerpc/PCI: Override pcibios_window_alignment()
PCI: Refactor pbus_size_mem()
PCI: Align P2P windows using pcibios_window_alignment()
PCI: Add weak pcibios_window_alignment() interface
Diffstat (limited to 'arch/powerpc/kernel/pci-common.c')
| -rw-r--r-- | arch/powerpc/kernel/pci-common.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 2aa04f29e1d..43fea543d68 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -99,6 +99,26 @@ void pcibios_free_controller(struct pci_controller *phb) kfree(phb); } +/* + * The function is used to return the minimal alignment + * for memory or I/O windows of the associated P2P bridge. + * By default, 4KiB alignment for I/O windows and 1MiB for + * memory windows. + */ +resource_size_t pcibios_window_alignment(struct pci_bus *bus, + unsigned long type) +{ + if (ppc_md.pcibios_window_alignment) + return ppc_md.pcibios_window_alignment(bus, type); + + /* + * PCI core will figure out the default + * alignment: 4KiB for I/O and 1MiB for + * memory window. + */ + return 1; +} + static resource_size_t pcibios_io_size(const struct pci_controller *hose) { #ifdef CONFIG_PPC64 |