diff options
Diffstat (limited to 'arch/microblaze/kernel/dma.c')
| -rw-r--r-- | arch/microblaze/kernel/dma.c | 30 |
1 files changed, 3 insertions, 27 deletions
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c index da68d00fd08..4633c36c1b3 100644 --- a/arch/microblaze/kernel/dma.c +++ b/arch/microblaze/kernel/dma.c @@ -13,23 +13,6 @@ #include <linux/export.h> #include <linux/bug.h> -/* - * Generic direct DMA implementation - * - * This implementation supports a per-device offset that can be applied if - * the address at which memory is visible to devices is not 0. Platform code - * can set archdata.dma_data to an unsigned long holding the offset. By - * default the offset is PCI_DRAM_OFFSET. - */ - -static unsigned long get_dma_direct_offset(struct device *dev) -{ - if (likely(dev)) - return (unsigned long)dev->archdata.dma_data; - - return PCI_DRAM_OFFSET; /* FIXME Not sure if is correct */ -} - #define NOT_COHERENT_CACHE static void *dma_direct_alloc_coherent(struct device *dev, size_t size, @@ -51,7 +34,7 @@ static void *dma_direct_alloc_coherent(struct device *dev, size_t size, return NULL; ret = page_address(page); memset(ret, 0, size); - *dma_handle = virt_to_phys(ret) + get_dma_direct_offset(dev); + *dma_handle = virt_to_phys(ret); return ret; #endif @@ -77,7 +60,7 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, /* FIXME this part of code is untested */ for_each_sg(sgl, sg, nents, i) { - sg->dma_address = sg_phys(sg) + get_dma_direct_offset(dev); + sg->dma_address = sg_phys(sg); __dma_sync(page_to_phys(sg_page(sg)) + sg->offset, sg->length, direction); } @@ -85,12 +68,6 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, return nents; } -static void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction direction, - struct dma_attrs *attrs) -{ -} - static int dma_direct_dma_supported(struct device *dev, u64 mask) { return 1; @@ -104,7 +81,7 @@ static inline dma_addr_t dma_direct_map_page(struct device *dev, struct dma_attrs *attrs) { __dma_sync(page_to_phys(page) + offset, size, direction); - return page_to_phys(page) + offset + get_dma_direct_offset(dev); + return page_to_phys(page) + offset; } static inline void dma_direct_unmap_page(struct device *dev, @@ -181,7 +158,6 @@ struct dma_map_ops dma_direct_ops = { .alloc = dma_direct_alloc_coherent, .free = dma_direct_free_coherent, .map_sg = dma_direct_map_sg, - .unmap_sg = dma_direct_unmap_sg, .dma_supported = dma_direct_dma_supported, .map_page = dma_direct_map_page, .unmap_page = dma_direct_unmap_page, |