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| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2009-02-25 01:35:12 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-25 12:09:51 (GMT) |
| commit | 4ab0d47d0ab311eb181532c1ecb6d02905685071 (patch) | |
| tree | 48b1a6cc01b65bab1442e05a971220366f998976 /arch/x86/include/asm/iomap.h | |
| parent | 6644107d57a8fa82b47e4c55da4d9d91a612f29c (diff) | |
| download | linux-4ab0d47d0ab311eb181532c1ecb6d02905685071.tar.xz | |
gpu/drm, x86, PAT: io_mapping_create_wc and resource_size_t
io_mapping_create_wc should take a resource_size_t parameter in place of
unsigned long. With unsigned long, there will be no way to map greater than 4GB
address in i386/32 bit.
On x86, greater than 4GB addresses cannot be mapped on i386 without PAE. Return
error for such a case.
Patch also adds a structure for io_mapping, that saves the base, size and
type on HAVE_ATOMIC_IOMAP archs, that can be used to verify the offset on
io_mapping_map calls.
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>
Diffstat (limited to 'arch/x86/include/asm/iomap.h')
| -rw-r--r-- | arch/x86/include/asm/iomap.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/iomap.h b/arch/x86/include/asm/iomap.h index c1f0628..86af260 100644 --- a/arch/x86/include/asm/iomap.h +++ b/arch/x86/include/asm/iomap.h @@ -23,6 +23,9 @@ #include <asm/pgtable.h> #include <asm/tlbflush.h> +int +is_io_mapping_possible(resource_size_t base, unsigned long size); + void * iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot); |