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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-11-11 17:25:17 +1100
committerPaul Mackerras <paulus@samba.org>2006-12-04 20:39:00 +1100
commitacfd946a1aaffdec346c2864f596d4d92125d1ad (patch)
treec3947421aa5206039238fb7fb2bee2874ca831c1 /arch/powerpc/platforms/cell/iommu.c
parentc80d9133e99de1af607314107910a2a1645efb17 (diff)
[POWERPC] Make cell use direct DMA ops
Now that the direct DMA ops supports an offset, we use that instead of defining our own. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/iommu.c')
-rw-r--r--arch/powerpc/platforms/cell/iommu.c79
1 files changed, 6 insertions, 73 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index e3ea5311476..6a97fe1319d 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -46,8 +46,6 @@
#include "iommu.h"
-static dma_addr_t cell_dma_valid = SPIDER_DMA_VALID;
-
static inline unsigned long
get_iopt_entry(unsigned long real_address, unsigned long ioid,
unsigned long prot)
@@ -417,83 +415,18 @@ static int cell_map_iommu(void)
return 1;
}
-static void *cell_alloc_coherent(struct device *hwdev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag)
-{
- void *ret;
-
- ret = (void *)__get_free_pages(flag, get_order(size));
- if (ret != NULL) {
- memset(ret, 0, size);
- *dma_handle = virt_to_abs(ret) | cell_dma_valid;
- }
- return ret;
-}
-
-static void cell_free_coherent(struct device *hwdev, size_t size,
- void *vaddr, dma_addr_t dma_handle)
-{
- free_pages((unsigned long)vaddr, get_order(size));
-}
-
-static dma_addr_t cell_map_single(struct device *hwdev, void *ptr,
- size_t size, enum dma_data_direction direction)
-{
- return virt_to_abs(ptr) | cell_dma_valid;
-}
-
-static void cell_unmap_single(struct device *hwdev, dma_addr_t dma_addr,
- size_t size, enum dma_data_direction direction)
-{
-}
-
-static int cell_map_sg(struct device *hwdev, struct scatterlist *sg,
- int nents, enum dma_data_direction direction)
-{
- int i;
-
- for (i = 0; i < nents; i++, sg++) {
- sg->dma_address = (page_to_phys(sg->page) + sg->offset)
- | cell_dma_valid;
- sg->dma_length = sg->length;
- }
-
- return nents;
-}
-
-static void cell_unmap_sg(struct device *hwdev, struct scatterlist *sg,
- int nents, enum dma_data_direction direction)
-{
-}
-
-static int cell_dma_supported(struct device *dev, u64 mask)
-{
- return mask < 0x100000000ull;
-}
-
-static struct dma_mapping_ops cell_iommu_ops = {
- .alloc_coherent = cell_alloc_coherent,
- .free_coherent = cell_free_coherent,
- .map_single = cell_map_single,
- .unmap_single = cell_unmap_single,
- .map_sg = cell_map_sg,
- .unmap_sg = cell_unmap_sg,
- .dma_supported = cell_dma_supported,
-};
-
void cell_init_iommu(void)
{
int setup_bus = 0;
- /* If we have an Axon bridge, clear the DMA valid mask. This is fairly
- * hackish but will work well enough until we have proper iommu code.
- */
- if (of_find_node_by_name(NULL, "axon"))
- cell_dma_valid = 0;
-
if (of_find_node_by_path("/mambo")) {
pr_info("Not using iommu on systemsim\n");
} else {
+ /* If we don't have an Axon bridge, we assume we have a
+ * spider which requires a DMA offset
+ */
+ if (of_find_node_by_name(NULL, "axon") == NULL)
+ dma_direct_offset = SPIDER_DMA_VALID;
if (!(of_chosen &&
get_property(of_chosen, "linux,iommu-off", NULL)))
@@ -509,5 +442,5 @@ void cell_init_iommu(void)
}
}
- pci_dma_ops = &cell_iommu_ops;
+ pci_dma_ops = &dma_direct_ops;
}