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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-08-04 21:08:28 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-08-28 06:24:11 +0200 |
| commit | 80d3e8abb73dad3983fef2597b52cab8fbcd876b (patch) | |
| tree | 39d73950289a3de9cbdb2846da3d340374034ce4 /arch | |
| parent | powerpc: Handle SWIOTLB mapping error properly (diff) | |
| download | linux-80d3e8abb73dad3983fef2597b52cab8fbcd876b.tar.xz linux-80d3e8abb73dad3983fef2597b52cab8fbcd876b.zip | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/Kconfig | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/dma-mapping.h | 11 | ||||
| -rw-r--r-- | arch/powerpc/kernel/dma.c | 11 |
3 files changed, 22 insertions, 1 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 6078253c6d76..9e03991dc878 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 4bd41b4051e3..cb2ca41dd526 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 c61f70e145ad..21b784d7e7d0 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); |