From 8b4a73db5402ee7a5444c8a7857f747d150aebbd Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Sat, 11 Nov 2006 17:25:14 +1100 Subject: [PATCH] --- yaml --- r: 42231 b: refs/heads/master c: 92b20c40dcca2d441f367da57e7665cce15c492a h: refs/heads/master i: 42229: 7a0c85a27af281d82753b48839105df660013bc9 42227: c1b856b4f410ec4d3c0689d1829fbbc5db8c052a 42223: aaacb505706de9fe5b9db3ad679199312a5bc6d5 v: v3 --- [refs] | 2 +- trunk/arch/powerpc/kernel/dma_64.c | 11 ++++++++--- trunk/include/asm-powerpc/dma-mapping.h | 2 ++ 3 files changed, 11 insertions(+), 4 deletions(-) diff --git a/[refs] b/[refs] index 49ff1fbba8eb..6872d85079b5 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 3bc0f40c287a435805b0545ffc44ea41f11cd43e +refs/heads/master: 92b20c40dcca2d441f367da57e7665cce15c492a diff --git a/trunk/arch/powerpc/kernel/dma_64.c b/trunk/arch/powerpc/kernel/dma_64.c index 4e6551199782..1d1dc76606ac 100644 --- a/trunk/arch/powerpc/kernel/dma_64.c +++ b/trunk/arch/powerpc/kernel/dma_64.c @@ -111,7 +111,11 @@ EXPORT_SYMBOL(dma_iommu_ops); /* * Generic direct DMA implementation + * + * This implementation supports a global offset that can be applied if + * the address at which memory is visible to devices is not 0. */ +unsigned long dma_direct_offset; static void *dma_direct_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag) @@ -122,7 +126,7 @@ static void *dma_direct_alloc_coherent(struct device *dev, size_t size, ret = (void *)__get_free_pages(flag, get_order(size)); if (ret != NULL) { memset(ret, 0, size); - *dma_handle = virt_to_abs(ret); + *dma_handle = virt_to_abs(ret) | dma_direct_offset; } return ret; } @@ -137,7 +141,7 @@ static dma_addr_t dma_direct_map_single(struct device *dev, void *ptr, size_t size, enum dma_data_direction direction) { - return virt_to_abs(ptr); + return virt_to_abs(ptr) | dma_direct_offset; } static void dma_direct_unmap_single(struct device *dev, dma_addr_t dma_addr, @@ -152,7 +156,8 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sg, int i; for (i = 0; i < nents; i++, sg++) { - sg->dma_address = page_to_phys(sg->page) + sg->offset; + sg->dma_address = (page_to_phys(sg->page) + sg->offset) | + dma_direct_offset; sg->dma_length = sg->length; } diff --git a/trunk/include/asm-powerpc/dma-mapping.h b/trunk/include/asm-powerpc/dma-mapping.h index 8367810c994c..7e38b5fddada 100644 --- a/trunk/include/asm-powerpc/dma-mapping.h +++ b/trunk/include/asm-powerpc/dma-mapping.h @@ -187,6 +187,8 @@ static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, extern struct dma_mapping_ops dma_iommu_ops; extern struct dma_mapping_ops dma_direct_ops; +extern unsigned long dma_direct_offset; + #else /* CONFIG_PPC64 */ #define dma_supported(dev, mask) (1)