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| author | Milton Miller <miltonm@bga.com> | 2009-01-08 02:19:46 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-02-11 16:00:07 +1100 |
| commit | c3bd517de67d33c44059656194e316facef181a5 (patch) | |
| tree | 8b61341ac8aec4d18499ce7a99d545b2912abb9a /arch/powerpc/kernel/pci-common.c | |
| parent | 6071ed0487c6ea8dcfadd9844b9b90944cd9de1e (diff) | |
| download | kernel-crypto-c3bd517de67d33c44059656194e316facef181a5.tar.gz kernel-crypto-c3bd517de67d33c44059656194e316facef181a5.tar.xz kernel-crypto-c3bd517de67d33c44059656194e316facef181a5.zip | |
powerpc/pci: Move hose_list and pci_address_to_pio to pci-common
move the definition of hose_list next to its hotplug spinlock.
create pcibios_io_size to encapsulate ifdef in existing pci-common
function pcibios_vaddr_is_ioport
move pci_address_to_pio to pci-common, using new pcibios_io_size, and
protect this GPL exported function against concurrent hotplug removal
Signed-off-by: Milton Miller <miltonm@bga.com>
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.c | 41 |
1 files changed, 35 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 0f418127231..2ad17315fc8 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -38,6 +38,7 @@ #include <asm/eeh.h> static DEFINE_SPINLOCK(hose_spinlock); +LIST_HEAD(hose_list); /* XXX kill that some day ... */ static int global_phb_number; /* Global phb counter */ @@ -113,19 +114,24 @@ void pcibios_free_controller(struct pci_controller *phb) kfree(phb); } +static resource_size_t pcibios_io_size(const struct pci_controller *hose) +{ +#ifdef CONFIG_PPC64 + return hose->pci_io_size; +#else + return hose->io_resource.end - hose->io_resource.start + 1; +#endif +} + int pcibios_vaddr_is_ioport(void __iomem *address) { int ret = 0; struct pci_controller *hose; - unsigned long size; + resource_size_t size; spin_lock(&hose_spinlock); list_for_each_entry(hose, &hose_list, list_node) { -#ifdef CONFIG_PPC64 - size = hose->pci_io_size; -#else - size = hose->io_resource.end - hose->io_resource.start + 1; -#endif + size = pcibios_io_size(hose); if (address >= hose->io_base_virt && address < (hose->io_base_virt + size)) { ret = 1; @@ -136,6 +142,29 @@ int pcibios_vaddr_is_ioport(void __iomem *address) return ret; } +unsigned long pci_address_to_pio(phys_addr_t address) +{ + struct pci_controller *hose; + resource_size_t size; + unsigned long ret = ~0; + + spin_lock(&hose_spinlock); + list_for_each_entry(hose, &hose_list, list_node) { + size = pcibios_io_size(hose); + if (address >= hose->io_base_phys && + address < (hose->io_base_phys + size)) { + unsigned long base = + (unsigned long)hose->io_base_virt - _IO_BASE; + ret = base + (address - hose->io_base_phys); + break; + } + } + spin_unlock(&hose_spinlock); + + return ret; +} +EXPORT_SYMBOL_GPL(pci_address_to_pio); + /* * Return the domain number for this bus. */ |