From 18e98307de0d746cb0845ebf66535ce2184c25a2 Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Wed, 26 May 2010 14:44:32 -0700 Subject: 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 Cc: Arnd Bergmann Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: Russell King Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Ingo Molnar Cc: Thomas Gleixner Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/ia64/Kconfig | 3 +++ arch/sh/Kconfig | 3 +++ arch/sparc/Kconfig | 3 +++ arch/sparc/include/asm/scatterlist.h | 2 -- arch/x86/Kconfig | 3 +++ include/asm-generic/scatterlist.h | 13 +++++-------- 6 files changed, 17 insertions(+), 10 deletions(-) diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 9676100b83e..f8afdd271f3 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 0e318c905ee..c5ee4ce60b5 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 d6781ce687e..6f1470baa31 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 0fa0d6da210..69d21bb052f 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 diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e0c619c55b4..5bdc143b122 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 51a7a43ab0c..5e087944a65 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 -- cgit v1.2.3