nios2: convert to dma_map_ops

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 117 deletions

diff --git a/arch/nios2/include/asm/dma-mapping.h b/arch/nios2/include/asm/dma-mapping.h
index b5567233f7f1..bec8ac8e6ad2 100644
--- a/arch/nios2/include/asm/dma-mapping.h
+++ b/arch/nios2/include/asm/dma-mapping.h
@@ -10,131 +10,20 @@
 #ifndef _ASM_NIOS2_DMA_MAPPING_H
 #define _ASM_NIOS2_DMA_MAPPING_H
 
-#include <linux/scatterlist.h>
-#include <linux/cache.h>
-#include <asm/cacheflush.h>
+extern struct dma_map_ops nios2_dma_ops;
 
-static inline void __dma_sync_for_device(void *vaddr, size_t size,
-                              enum dma_data_direction direction)
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
 {
-        switch (direction) {
-        case DMA_FROM_DEVICE:
-                invalidate_dcache_range((unsigned long)vaddr,
-                        (unsigned long)(vaddr + size));
-                break;
-        case DMA_TO_DEVICE:
-                /*
-                 * We just need to flush the caches here , but Nios2 flush
-                 * instruction will do both writeback and invalidate.
-                 */
-        case DMA_BIDIRECTIONAL: /* flush and invalidate */
-                flush_dcache_range((unsigned long)vaddr,
-                        (unsigned long)(vaddr + size));
-                break;
-        default:
-                BUG();
-        }
-}
-
-static inline void __dma_sync_for_cpu(void *vaddr, size_t size,
-                              enum dma_data_direction direction)
-{
-        switch (direction) {
-        case DMA_BIDIRECTIONAL:
-        case DMA_FROM_DEVICE:
-                invalidate_dcache_range((unsigned long)vaddr,
-                        (unsigned long)(vaddr + size));
-                break;
-        case DMA_TO_DEVICE:
-                break;
-        default:
-                BUG();
-        }
-}
-
-#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
-#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-
-void *dma_alloc_coherent(struct device *dev, size_t size,
-                           dma_addr_t *dma_handle, gfp_t flag);
-
-void dma_free_coherent(struct device *dev, size_t size,
-                         void *vaddr, dma_addr_t dma_handle);
-
-static inline dma_addr_t dma_map_single(struct device *dev, void *ptr,
-                                        size_t size,
-                                        enum dma_data_direction direction)
-{
-        BUG_ON(!valid_dma_direction(direction));
-        __dma_sync_for_device(ptr, size, direction);
-        return virt_to_phys(ptr);
-}
-
-static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
-                                size_t size, enum dma_data_direction direction)
-{
-}
-
-extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-        enum dma_data_direction direction);
-extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
-        unsigned long offset, size_t size, enum dma_data_direction direction);
-extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
-        size_t size, enum dma_data_direction direction);
-extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
-        int nhwentries, enum dma_data_direction direction);
-extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
-        size_t size, enum dma_data_direction direction);
-extern void dma_sync_single_for_device(struct device *dev,
-        dma_addr_t dma_handle, size_t size, enum dma_data_direction direction);
-extern void dma_sync_single_range_for_cpu(struct device *dev,
-        dma_addr_t dma_handle, unsigned long offset, size_t size,
-        enum dma_data_direction direction);
-extern void dma_sync_single_range_for_device(struct device *dev,
-        dma_addr_t dma_handle, unsigned long offset, size_t size,
-        enum dma_data_direction direction);
-extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
-        int nelems, enum dma_data_direction direction);
-extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
-        int nelems, enum dma_data_direction direction);
-
-static inline int dma_supported(struct device *dev, u64 mask)
-{
-        return 1;
-}
-
-static inline int dma_set_mask(struct device *dev, u64 mask)
-{
-        if (!dev->dma_mask || !dma_supported(dev, mask))
-                return -EIO;
-
-        *dev->dma_mask = mask;
-
-        return 0;
-}
-
-static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
-        return 0;
+        return &nios2_dma_ops;
 }
 
 /*
-* dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to
-* do any flushing here.
-*/
+ * dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to
+ * do any flushing here.
+ */
 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
                                   enum dma_data_direction direction)
 {
 }
 
-/* drivers/base/dma-mapping.c */
-extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
-                void *cpu_addr, dma_addr_t dma_addr, size_t size);
-extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
-                void *cpu_addr, dma_addr_t dma_addr,
-                size_t size);
-
-#define dma_mmap_coherent(d, v, c, h, s) dma_common_mmap(d, v, c, h, s)
-#define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s)
-
 #endif /* _ASM_NIOS2_DMA_MAPPING_H */