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>
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 *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 @@
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);