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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2009-08-04 19:08:28 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-08-28 14:24:11 +1000
commit80d3e8abb73dad3983fef2597b52cab8fbcd876b (patch)
tree39d73950289a3de9cbdb2846da3d340374034ce4
parent4a9a6bfe707cfe5bcb0a20eabe240293a095cd10 (diff)
downloadlinux-linaro-android-80d3e8abb73dad3983fef2597b52cab8fbcd876b.tar.gz
powerpc: Add CONFIG_DMA_API_DEBUG support
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
-rw-r--r--arch/powerpc/Kconfig1
-rw-r--r--arch/powerpc/include/asm/dma-mapping.h11
-rw-r--r--arch/powerpc/kernel/dma.c11
3 files changed, 22 insertions, 1 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 6078253c6d7..9e03991dc87 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -121,6 +121,7 @@ config PPC
select HAVE_ARCH_TRACEHOOK
select HAVE_LMB
select HAVE_DMA_ATTRS
+ select HAVE_DMA_API_DEBUG
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_OPROFILE
select HAVE_SYSCALL_WRAPPERS if PPC64
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index 4bd41b4051e..cb2ca41dd52 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -127,9 +127,15 @@ static inline void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
struct dma_map_ops *dma_ops = get_dma_ops(dev);
+ void *cpu_addr;
BUG_ON(!dma_ops);
- return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
+
+ cpu_addr = dma_ops->alloc_coherent(dev, size, dma_handle, flag);
+
+ debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
+
+ return cpu_addr;
}
static inline void dma_free_coherent(struct device *dev, size_t size,
@@ -138,6 +144,9 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
struct dma_map_ops *dma_ops = get_dma_ops(dev);
BUG_ON(!dma_ops);
+
+ debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
+
dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
}
diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
index c61f70e145a..21b784d7e7d 100644
--- a/arch/powerpc/kernel/dma.c
+++ b/arch/powerpc/kernel/dma.c
@@ -7,6 +7,7 @@
#include <linux/device.h>
#include <linux/dma-mapping.h>
+#include <linux/dma-debug.h>
#include <linux/lmb.h>
#include <asm/bug.h>
#include <asm/abs_addr.h>
@@ -156,3 +157,13 @@ struct dma_map_ops dma_direct_ops = {
#endif
};
EXPORT_SYMBOL(dma_direct_ops);
+
+#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
+
+static int __init dma_init(void)
+{
+ dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
+
+ return 0;
+}
+fs_initcall(dma_init);