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PCI: Add pci_remap_iospace() to map bus I/O resources

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Add pci_remap_iospace() to map bus I/O resources into the CPU virtual
address space.  Architectures with special needs may provide their own
version, but most should be able to use this one.

This function is useful for PCI host bridge drivers that need to map the
PCI I/O resources into virtual memory space.

[bhelgaas: phys_addr description, drop temporary "err" variable]
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
CC: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Liviu Dudau 2014-09-29 15:29:30 +01:00 • committed by Bjorn Helgaas
parent cbe4097f8a
commit 8b921acfef
3 changed files with 38 additions and 0 deletions
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3
include/linux/pci.h
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@ -1100,6 +1100,9 @@ int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
resource_size_t),
void *alignf_data);
int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
static inline dma_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
{
struct pci_bus_region region;