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Commit 2cc7138f authored by Thomas Bogendoerfer's avatar Thomas Bogendoerfer Committed by Helge Deller
Browse files

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 <tsbogend@alpha.franken.de>
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 9a66d186

arch/parisc/include/asm/pci.h

+5 −0
Original line number Diff line number Diff line
@@ -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 */

arch/parisc/kernel/pci.c

+27 −0
Original line number Diff line number Diff line
@@ -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.