diff options
| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-05-26 14:44:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-27 09:12:54 -0700 |
| commit | 18e98307de0d746cb0845ebf66535ce2184c25a2 (patch) | |
| tree | eac998f31e3930ffc1f54e524a2a9bbc82b851e0 | |
| parent | 204f3a04449a9a775e465f7d87bcab08f170e59e (diff) | |
asm-generic: add NEED_SG_DMA_LENGTH to define sg_dma_len()
There are only two ways to define sg_dma_len(); use sg->dma_length or
sg->length. This patch introduces NEED_SG_DMA_LENGTH that enables
architectures to choose sg->dma_length or sg->length.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/ia64/Kconfig | 3 | ||||
| -rw-r--r-- | arch/sh/Kconfig | 3 | ||||
| -rw-r--r-- | arch/sparc/Kconfig | 3 | ||||
| -rw-r--r-- | arch/sparc/include/asm/scatterlist.h | 2 | ||||
| -rw-r--r-- | arch/x86/Kconfig | 3 | ||||
| -rw-r--r-- | include/asm-generic/scatterlist.h | 13 |
6 files changed, 17 insertions, 10 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 9676100b83ee..f8afdd271f3d 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -56,6 +56,9 @@ config MMU config NEED_DMA_MAP_STATE def_bool y +config NEED_SG_DMA_LENGTH + def_bool y + config SWIOTLB bool diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 0e318c905eea..c5ee4ce60b57 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -186,6 +186,9 @@ config DMA_NONCOHERENT config NEED_DMA_MAP_STATE def_bool DMA_NONCOHERENT +config NEED_SG_DMA_LENGTH + def_bool y + source "init/Kconfig" source "kernel/Kconfig.freezer" diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index d6781ce687e2..6f1470baa314 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -133,6 +133,9 @@ config ZONE_DMA config NEED_DMA_MAP_STATE def_bool y +config NEED_SG_DMA_LENGTH + def_bool y + config GENERIC_ISA_DMA bool default y if SPARC32 diff --git a/arch/sparc/include/asm/scatterlist.h b/arch/sparc/include/asm/scatterlist.h index 0fa0d6da2107..69d21bb052f1 100644 --- a/arch/sparc/include/asm/scatterlist.h +++ b/arch/sparc/include/asm/scatterlist.h @@ -1,8 +1,6 @@ #ifndef _SPARC_SCATTERLIST_H #define _SPARC_SCATTERLIST_H -#define sg_dma_len(sg) ((sg)->dma_length) - #define ISA_DMA_THRESHOLD (~0UL) #include <asm-generic/scatterlist.h> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e0c619c55b4e..5bdc143b1228 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -109,6 +109,9 @@ config SBUS config NEED_DMA_MAP_STATE def_bool (X86_64 || DMAR || DMA_API_DEBUG) +config NEED_SG_DMA_LENGTH + def_bool X86_64 + config GENERIC_ISA_DMA def_bool y diff --git a/include/asm-generic/scatterlist.h b/include/asm-generic/scatterlist.h index 51a7a43ab0ce..5e087944a659 100644 --- a/include/asm-generic/scatterlist.h +++ b/include/asm-generic/scatterlist.h @@ -11,7 +11,9 @@ struct scatterlist { unsigned int offset; unsigned int length; dma_addr_t dma_address; +#ifdef CONFIG_NEED_SG_DMA_LENGTH unsigned int dma_length; +#endif }; /* @@ -22,17 +24,12 @@ struct scatterlist { * is 0. */ #define sg_dma_address(sg) ((sg)->dma_address) -#ifndef sg_dma_len -/* - * Normally, you have an iommu on 64 bit machines, but not on 32 bit - * machines. Architectures that are differnt should override this. - */ -#if __BITS_PER_LONG == 64 + +#ifdef CONFIG_NEED_SG_DMA_LENGTH #define sg_dma_len(sg) ((sg)->dma_length) #else #define sg_dma_len(sg) ((sg)->length) -#endif /* 64 bit */ -#endif /* sg_dma_len */ +#endif #define ARCH_HAS_SG_CHAIN |