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authorMarek Szyprowski <m.szyprowski@samsung.com>2012-07-30 09:11:33 +0200
committerMarek Szyprowski <m.szyprowski@samsung.com>2012-07-30 12:25:45 +0200
commite9da6e9905e639b0f842a244bc770b48ad0523e9 (patch)
treec99beeb259716121dcb388f35f54f99a2a414a92 /arch/arm/mm/mm.h
parent5e6cafc83e30f0f70c79a2b7aef237dc57e29f02 (diff)
downloadlinux-e9da6e9905e639b0f842a244bc770b48ad0523e9.tar.gz
ARM: dma-mapping: remove custom consistent dma region
This patch changes dma-mapping subsystem to use generic vmalloc areas for all consistent dma allocations. This increases the total size limit of the consistent allocations and removes platform hacks and a lot of duplicated code. Atomic allocations are served from special pool preallocated on boot, because vmalloc areas cannot be reliably created in atomic context. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Minchan Kim <minchan@kernel.org>
Diffstat (limited to 'arch/arm/mm/mm.h')
-rw-r--r--arch/arm/mm/mm.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h
index 2e8a1efdf7b..6776160618e 100644
--- a/arch/arm/mm/mm.h
+++ b/arch/arm/mm/mm.h
@@ -59,6 +59,9 @@ extern void __flush_dcache_page(struct address_space *mapping, struct page *page
#define VM_ARM_MTYPE(mt) ((mt) << 20)
#define VM_ARM_MTYPE_MASK (0x1f << 20)
+/* consistent regions used by dma_alloc_attrs() */
+#define VM_ARM_DMA_CONSISTENT 0x20000000
+
#endif
#ifdef CONFIG_ZONE_DMA