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authorDmitry Baryshkov <dbaryshkov@gmail.com>2008-07-18 13:30:14 +0400
committerIngo Molnar <mingo@elte.hu>2008-07-18 21:14:01 +0200
commit1fe532685a1984dc9f2603ed20bd5e630ba79709 (patch)
treedfae117e13e895bc7cf46a09a969f226e59991f4 /arch/arm/mm
parent538c29d43ebdac2edcef96ac07982d2296a63077 (diff)
ARM: support generic per-device coherent dma mem
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/arm/mm')
-rw-r--r--arch/arm/mm/consistent.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/mm/consistent.c b/arch/arm/mm/consistent.c
index 333a82a3717..db7b3e38ef1 100644
--- a/arch/arm/mm/consistent.c
+++ b/arch/arm/mm/consistent.c
@@ -274,6 +274,11 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
void *
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
{
+ void *memory;
+
+ if (dma_alloc_from_coherent(dev, size, handle, &memory))
+ return memory;
+
if (arch_is_coherent()) {
void *virt;
@@ -362,6 +367,9 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr
WARN_ON(irqs_disabled());
+ if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
+ return;
+
if (arch_is_coherent()) {
kfree(cpu_addr);
return;