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authorYoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>2009-06-04 00:16:04 +0900
committerRalf Baechle <ralf@linux-mips.org>2009-11-13 18:10:37 +0100
commitf8ac04255dc8baa1c018e8028222d842efa56e6b (patch)
tree4aedfaf3f4a2e5f0ffbc3280fa94e48e10ac9e38 /arch/mips/mm
parentda0bac33413b2888d3623dad3ad19ce76b688f07 (diff)
downloadop-kernel-dev-f8ac04255dc8baa1c018e8028222d842efa56e6b.zip
op-kernel-dev-f8ac04255dc8baa1c018e8028222d842efa56e6b.tar.gz
MIPS: Add DMA declare coherent memory support
The ohci-sm501 driver requires dma_declare_coherent_memory(). It is used by the driver's local memory allocation with dma_alloc_coherent(). Tested on TANBAC TB0287(VR4131 + SM501). [Ralf: Fixed reject in dma-default.c and removed the entire #if 0'ed block in dma-mapping.h instead of just the #if 0.] Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm')
-rw-r--r--arch/mips/mm/dma-default.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index 7e48e76..9367e33 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -90,6 +90,9 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
{
void *ret;
+ if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
+ return ret;
+
gfp = massage_gfp_flags(dev, gfp);
ret = (void *) __get_free_pages(gfp, get_order(size));
@@ -122,6 +125,10 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
unsigned long addr = (unsigned long) vaddr;
+ int order = get_order(size);
+
+ if (dma_release_from_coherent(dev, order, vaddr))
+ return;
plat_unmap_dma_mem(dev, dma_handle, size, DMA_BIDIRECTIONAL);
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