Commit e32205eb authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by Linus Torvalds
Browse files

powerpc: use asm-generic/scatterlist.h 



Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4a14d84e

arch/powerpc/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -663,6 +663,9 @@ config ZONE_DMA 
config NEED_DMA_MAP_STATE

	def_bool (PPC64 || NOT_COHERENT_CACHE)



config NEED_SG_DMA_LENGTH

	def_bool y



config GENERIC_ISA_DMA

	bool

	depends on PPC64 || POWER4 || 6xx && !CPM2

arch/powerpc/include/asm/scatterlist.h

+1 −28
Original line number Diff line number Diff line
@@ -9,38 +9,11 @@ 
 * 2 of the License, or (at your option) any later version.

 */



#ifdef __KERNEL__

#include <linux/types.h>

#include <asm/dma.h>



struct scatterlist {

#ifdef CONFIG_DEBUG_SG

	unsigned long sg_magic;

#endif

	unsigned long page_link;

	unsigned int offset;

	unsigned int length;



	/* For TCE or SWIOTLB support */

	dma_addr_t dma_address;

	u32 dma_length;

};



/*

 * These macros should be used after a dma_map_sg call has been done

 * to get bus addresses of each of the SG entries and their lengths.

 * You should only work with the number of sg entries pci_map_sg

 * returns, or alternatively stop on the first sg_dma_len(sg) which

 * is 0.

 */

#define sg_dma_address(sg)	((sg)->dma_address)

#define sg_dma_len(sg)		((sg)->dma_length)

#include <asm-generic/scatterlist.h>



#ifdef __powerpc64__

#define ISA_DMA_THRESHOLD	(~0UL)

#endif



#define ARCH_HAS_SG_CHAIN



#endif /* __KERNEL__ */

#endif /* _ASM_POWERPC_SCATTERLIST_H */

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