kernel.git/arch/powerpc/kernel/dma.c, branch linux-2.6.28.y

powerpc: Fix dma_map_sg() cache flushing on non coherent platforms

2008-12-03T07:24:08Z

On PowerPC 4xx or other non cache-coherent platforms, we lost the appropriate cache flushing in dma_map_sg() when merging the 32 and 64-bit DMA code (commit 4fc665b88a79a45bae8bbf3a05563c27c7337c3d, "powerpc: Merge 32 and 64-bit dma code"). This restores it. Signed-off-by: Benjamin Herrenschmidt Acked-by: Becky Bruce Signed-off-by: Paul Mackerras

powerpc: Fix DMA offset for non-coherent DMA

2008-10-13T23:35:26Z

After Becky's work we can almost have different DMA offsets between on-chip devices and PCI. Almost because there's a problem with the non-coherent DMA code that basically ignores the programmed offset to use the global one for everything. This fixes it. Signed-off-by: Benjamin Herrenschmidt

powerpc: Merge 32 and 64-bit dma code

2008-09-24T21:26:45Z

We essentially adopt the 64-bit dma code, with some changes to support 32-bit systems, including HIGHMEM. dma functions on 32-bit are now invoked via accessor functions which call the correct op for a device based on archdata dma_ops. If there is no archdata dma_ops, this defaults to dma_direct_ops. In addition, the dma_map/unmap_page functions are added to dma_ops because we can't just fall back on map/unmap_single when HIGHMEM is enabled. In the case of dma_direct_*, we stop using map/unmap_single and just use the page version - this saves a lot of ugly ifdeffing. We leave map/unmap_single in the dma_ops definition, though, because they are needed by the iommu code, which does not implement map/unmap_page. Ideally, going forward, we will completely eliminate map/unmap_single and just have map/unmap_page, if it's workable for 64-bit. Signed-off-by: Becky Bruce Signed-off-by: Kumar Gala

powerpc: Drop archdata numa_node

2008-09-24T21:26:43Z

Use the struct device's numa_node instead; use accessor functions to get/set numa_node. Signed-off-by: Becky Bruce Signed-off-by: Kumar Gala

powerpc: Move iommu dma ops from dma.c to dma-iommu.c

2008-09-24T21:26:42Z

32-bit platforms are about to start using dma.c; move the iommu dma ops into their own file to make this a bit cleaner. Signed-off-by: Becky Bruce Signed-off-by: Kumar Gala

powerpc: Rename dma_64.c to dma.c

2008-09-24T21:26:41Z

This is in preparation for the merge of the 32 and 64-bit dma code in arch/powerpc. Signed-off-by: Becky Bruce Signed-off-by: Kumar Gala