From 2cc7138f4347df939ce03f313e3d87794bab36f8 Mon Sep 17 00:00:00 2001 From: Thomas Bogendoerfer Date: Fri, 14 Jun 2013 09:05:41 +0200 Subject: parisc: provide pci_mmap_page_range() for parisc pci_mmap_page_range() is needed for X11-server support on C8000 with ATI FireGL card. Signed-off-by Thomas Bogendoerfer Signed-off-by: Helge Deller --- arch/parisc/kernel/pci.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'arch/parisc/kernel/pci.c') diff --git a/arch/parisc/kernel/pci.c b/arch/parisc/kernel/pci.c index 6030905..64f2764 100644 --- a/arch/parisc/kernel/pci.c +++ b/arch/parisc/kernel/pci.c @@ -220,6 +220,33 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, } +int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, + enum pci_mmap_state mmap_state, int write_combine) +{ + unsigned long prot; + + /* + * I/O space can be accessed via normal processor loads and stores on + * this platform but for now we elect not to do this and portable + * drivers should not do this anyway. + */ + if (mmap_state == pci_mmap_io) + return -EINVAL; + + if (write_combine) + return -EINVAL; + + /* + * Ignore write-combine; for now only return uncached mappings. + */ + prot = pgprot_val(vma->vm_page_prot); + prot |= _PAGE_NO_CACHE; + vma->vm_page_prot = __pgprot(prot); + + return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, + vma->vm_end - vma->vm_start, vma->vm_page_prot); +} + /* * A driver is enabling the device. We make sure that all the appropriate * bits are set to allow the device to operate as the driver is expecting. -- cgit v1.1