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Commit 80d3e8ab authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by Benjamin Herrenschmidt
Browse files

powerpc: Add CONFIG_DMA_API_DEBUG support 



Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 4a9a6bfe

arch/powerpc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/powerpc/include/asm/dma-mapping.h

+10 −1
Original line number Diff line number Diff line
@@ -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);

}

arch/powerpc/kernel/dma.c

+11 −0
Original line number Diff line number Diff line
@@ -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);