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gpu/drm, x86, PAT: PAT support for io_mapping_*

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Make io_mapping_create_wc and io_mapping_free go through PAT to make sure
that there are no memory type aliases.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Eric Anholt <eric@anholt.net>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Venkatesh Pallipadi
2009-02-24 17:35:14 -08:00
committed by Ingo Molnar
parent 7880f74645
commit 17581ad812
3 changed files with 48 additions and 5 deletions
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5
arch/x86/include/asm/iomap.h
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@ -24,7 +24,10 @@
#include <asm/tlbflush.h>
int
is_io_mapping_possible(resource_size_t base, unsigned long size);
reserve_io_memtype_wc(u64 base, unsigned long size, pgprot_t *prot);
void
free_io_memtype(u64 base, unsigned long size);
void *
iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot);