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authorYoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>2009-06-03 17:16:04 +0200
committerRalf Baechle <ralf@linux-mips.org>2009-11-13 18:10:37 +0100
commitf8ac04255dc8baa1c018e8028222d842efa56e6b (patch)
tree4aedfaf3f4a2e5f0ffbc3280fa94e48e10ac9e38 /arch/mips
parentMIPS: Fix emulation of 64-bit FPU on FPU-less 64-bit CPUs. (diff)
downloadlinux-f8ac04255dc8baa1c018e8028222d842efa56e6b.tar.xz
linux-f8ac04255dc8baa1c018e8028222d842efa56e6b.zip
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')
-rw-r--r--arch/mips/Kconfig1
-rw-r--r--arch/mips/include/asm/dma-mapping.h11
-rw-r--r--arch/mips/mm/dma-default.c7
3 files changed, 9 insertions, 10 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 03bd56a2fb6e..1aad0d9f5074 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1,6 +1,7 @@
config MIPS
bool
default y
+ select HAVE_GENERIC_DMA_COHERENT
select HAVE_IDE
select HAVE_OPROFILE
select HAVE_ARCH_KGDB
diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h
index d16afddb09a9..664ba53dc32a 100644
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -3,6 +3,7 @@
#include <asm/scatterlist.h>
#include <asm/cache.h>
+#include <asm-generic/dma-coherent.h>
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag);
@@ -73,14 +74,4 @@ extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr);
extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction);
-#if 0
-#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
-
-extern int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
- dma_addr_t device_addr, size_t size, int flags);
-extern void dma_release_declared_memory(struct device *dev);
-extern void * dma_mark_declared_memory_occupied(struct device *dev,
- dma_addr_t device_addr, size_t size);
-#endif
-
#endif /* _ASM_DMA_MAPPING_H */
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index 7e48e76148aa..9367e33fbd18 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);