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parisc: provide pci_mmap_page_range() for parisc

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pci_mmap_page_range() is needed for X11-server support on C8000 with ATI
FireGL card.

Signed-off-by Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Thomas Bogendoerfer 2013-06-14 09:05:41 +02:00 committed by Helge Deller
parent 9a66d1869d
commit 2cc7138f43
2 changed files with 32 additions and 0 deletions
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5
arch/parisc/include/asm/pci.h
View File

@ -225,4 +225,9 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
return channel ? 15 : 14;
}
#define HAVE_PCI_MMAP
extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
enum pci_mmap_state mmap_state, int write_combine);
#endif /* __ASM_PARISC_PCI_H */

27
arch/parisc/kernel/pci.c
View File

@ -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.