From 80d3e8abb73dad3983fef2597b52cab8fbcd876b Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Tue, 4 Aug 2009 19:08:28 +0000 Subject: [PATCH] powerpc: Add CONFIG_DMA_API_DEBUG support Signed-off-by: FUJITA Tomonori Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/dma-mapping.h | 11 ++++++++++- arch/powerpc/kernel/dma.c | 11 +++++++++++ 3 files changed, 22 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 6078253..9e03991 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 4bd41b4..cb2ca41 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 c61f70e..21b784d 100644 --- a/arch/powerpc/kernel/dma.c +++ b/arch/powerpc/kernel/dma.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -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); -- 2.7.4