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, 80 insertions, 69 deletions

diff --git a/arch/nios2/mm/dma-mapping.c b/arch/nios2/mm/dma-mapping.c
index ac5da7594f0b..90422c367ed3 100644
--- a/arch/nios2/mm/dma-mapping.c
+++ b/arch/nios2/mm/dma-mapping.c
@@ -20,9 +20,46 @@
 #include <linux/cache.h>
 #include <asm/cacheflush.h>
 
+static inline void __dma_sync_for_device(void *vaddr, size_t size,
+                              enum dma_data_direction direction)
+{
+        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();
+        }
+}
 
-void *dma_alloc_coherent(struct device *dev, size_t size,
-                            dma_addr_t *dma_handle, gfp_t gfp)
+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();
+        }
+}
+
+static void *nios2_dma_alloc(struct device *dev, size_t size,
+                dma_addr_t *dma_handle, gfp_t gfp, struct dma_attrs *attrs)
 {
         void *ret;
 
@@ -45,24 +82,21 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
 
         return ret;
 }
-EXPORT_SYMBOL(dma_alloc_coherent);
 
-void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
-                        dma_addr_t dma_handle)
+static void nios2_dma_free(struct device *dev, size_t size, void *vaddr,
+                dma_addr_t dma_handle, struct dma_attrs *attrs)
 {
         unsigned long addr = (unsigned long) CAC_ADDR((unsigned long) vaddr);
 
         free_pages(addr, get_order(size));
 }
-EXPORT_SYMBOL(dma_free_coherent);
 
-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-                enum dma_data_direction direction)
+static int nios2_dma_map_sg(struct device *dev, struct scatterlist *sg,
+                int nents, enum dma_data_direction direction,
+                struct dma_attrs *attrs)
 {
         int i;
 
-        BUG_ON(!valid_dma_direction(direction));
-
         for_each_sg(sg, sg, nents, i) {
                 void *addr;
 
@@ -75,40 +109,32 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 
         return nents;
 }
-EXPORT_SYMBOL(dma_map_sg);
 
-dma_addr_t dma_map_page(struct device *dev, struct page *page,
+static dma_addr_t nios2_dma_map_page(struct device *dev, struct page *page,
                         unsigned long offset, size_t size,
-                        enum dma_data_direction direction)
+                        enum dma_data_direction direction,
+                        struct dma_attrs *attrs)
 {
-        void *addr;
-
-        BUG_ON(!valid_dma_direction(direction));
+        void *addr = page_address(page) + offset;
 
-        addr = page_address(page) + offset;
         __dma_sync_for_device(addr, size, direction);
-
         return page_to_phys(page) + offset;
 }
-EXPORT_SYMBOL(dma_map_page);
 
-void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
-                    enum dma_data_direction direction)
+static void nios2_dma_unmap_page(struct device *dev, dma_addr_t dma_address,
+                size_t size, enum dma_data_direction direction,
+                struct dma_attrs *attrs)
 {
-        BUG_ON(!valid_dma_direction(direction));
-
         __dma_sync_for_cpu(phys_to_virt(dma_address), size, direction);
 }
-EXPORT_SYMBOL(dma_unmap_page);
 
-void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
-                  enum dma_data_direction direction)
+static void nios2_dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+                int nhwentries, enum dma_data_direction direction,
+                struct dma_attrs *attrs)
 {
         void *addr;
         int i;
 
-        BUG_ON(!valid_dma_direction(direction));
-
         if (direction == DMA_TO_DEVICE)
                 return;
 
@@ -118,69 +144,54 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
                         __dma_sync_for_cpu(addr, sg->length, direction);
         }
 }
-EXPORT_SYMBOL(dma_unmap_sg);
-
-void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
-                             size_t size, enum dma_data_direction direction)
-{
-        BUG_ON(!valid_dma_direction(direction));
 
-        __dma_sync_for_cpu(phys_to_virt(dma_handle), size, direction);
-}
-EXPORT_SYMBOL(dma_sync_single_for_cpu);
-
-void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
-                                size_t size, enum dma_data_direction direction)
-{
-        BUG_ON(!valid_dma_direction(direction));
-
-        __dma_sync_for_device(phys_to_virt(dma_handle), size, direction);
-}
-EXPORT_SYMBOL(dma_sync_single_for_device);
-
-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)
+static void nios2_dma_sync_single_for_cpu(struct device *dev,
+                dma_addr_t dma_handle, size_t size,
+                enum dma_data_direction direction)
 {
-        BUG_ON(!valid_dma_direction(direction));
-
         __dma_sync_for_cpu(phys_to_virt(dma_handle), size, direction);
 }
-EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
 
-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)
+static void nios2_dma_sync_single_for_device(struct device *dev,
+                dma_addr_t dma_handle, size_t size,
+                enum dma_data_direction direction)
 {
-        BUG_ON(!valid_dma_direction(direction));
-
         __dma_sync_for_device(phys_to_virt(dma_handle), size, direction);
 }
-EXPORT_SYMBOL(dma_sync_single_range_for_device);
 
-void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
-                         enum dma_data_direction direction)
+static void nios2_dma_sync_sg_for_cpu(struct device *dev,
+                struct scatterlist *sg, int nelems,
+                enum dma_data_direction direction)
 {
         int i;
 
-        BUG_ON(!valid_dma_direction(direction));
-
         /* Make sure that gcc doesn't leave the empty loop body.  */
         for_each_sg(sg, sg, nelems, i)
                 __dma_sync_for_cpu(sg_virt(sg), sg->length, direction);
 }
-EXPORT_SYMBOL(dma_sync_sg_for_cpu);
 
-void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
-                                int nelems, enum dma_data_direction direction)
+static void nios2_dma_sync_sg_for_device(struct device *dev,
+                struct scatterlist *sg, int nelems,
+                enum dma_data_direction direction)
 {
         int i;
 
-        BUG_ON(!valid_dma_direction(direction));
-
         /* Make sure that gcc doesn't leave the empty loop body.  */
         for_each_sg(sg, sg, nelems, i)
                 __dma_sync_for_device(sg_virt(sg), sg->length, direction);
 
 }
-EXPORT_SYMBOL(dma_sync_sg_for_device);
+
+struct dma_map_ops nios2_dma_ops = {
+        .alloc                  = nios2_dma_alloc,
+        .free                   = nios2_dma_free,
+        .map_page               = nios2_dma_map_page,
+        .unmap_page             = nios2_dma_unmap_page,
+        .map_sg                 = nios2_dma_map_sg,
+        .unmap_sg               = nios2_dma_unmap_sg,
+        .sync_single_for_device = nios2_dma_sync_single_for_device,
+        .sync_single_for_cpu    = nios2_dma_sync_single_for_cpu,
+        .sync_sg_for_cpu        = nios2_dma_sync_sg_for_cpu,
+        .sync_sg_for_device     = nios2_dma_sync_sg_for_device,
+};
+EXPORT_SYMBOL(nios2_dma_ops);