1 files changed, 179 insertions, 0 deletions

diff --git a/include/asm-sh/dma-mapping.h b/include/asm-sh/dma-mapping.h
new file mode 100644
index 000000000000..80d164c1529e
--- /dev/null
+++ b/include/asm-sh/dma-mapping.h
@@ -0,0 +1,179 @@
+#ifndef __ASM_SH_DMA_MAPPING_H
+#define __ASM_SH_DMA_MAPPING_H
+
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <asm/scatterlist.h>
+#include <asm/io.h>
+
+extern struct bus_type pci_bus_type;
+
+/* arch/sh/mm/consistent.c */
+extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle);
+extern void consistent_free(void *vaddr, size_t size);
+extern void consistent_sync(void *vaddr, size_t size, int direction);
+
+#define dma_supported(dev, mask)        (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 void *dma_alloc_coherent(struct device *dev, size_t size,
+                         dma_addr_t *dma_handle, int flag)
+{
+        if (sh_mv.mv_consistent_alloc) {
+                void *ret;
+
+                ret = sh_mv.mv_consistent_alloc(dev, size, dma_handle, flag);
+                if (ret != NULL)
+                        return ret;
+        }
+
+        return consistent_alloc(flag, size, dma_handle);
+}
+
+static inline void dma_free_coherent(struct device *dev, size_t size,
+                       void *vaddr, dma_addr_t dma_handle)
+{
+        if (sh_mv.mv_consistent_free) {
+                int ret;
+
+                ret = sh_mv.mv_consistent_free(dev, size, vaddr, dma_handle);
+                if (ret == 0)
+                        return;
+        }
+
+        consistent_free(vaddr, size);
+}
+
+static inline void dma_cache_sync(void *vaddr, size_t size,
+                                  enum dma_data_direction dir)
+{
+        consistent_sync(vaddr, size, (int)dir);
+}
+
+static inline dma_addr_t dma_map_single(struct device *dev,
+                                        void *ptr, size_t size,
+                                        enum dma_data_direction dir)
+{
+#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
+        if (dev->bus == &pci_bus_type)
+                return virt_to_bus(ptr);
+#endif
+        dma_cache_sync(ptr, size, dir);
+
+        return virt_to_bus(ptr);
+}
+
+#define dma_unmap_single(dev, addr, size, dir)  do { } while (0)
+
+static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
+                             int nents, enum dma_data_direction dir)
+{
+        int i;
+
+        for (i = 0; i < nents; i++) {
+#if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
+                dma_cache_sync(page_address(sg[i].page) + sg[i].offset,
+                               sg[i].length, dir);
+#endif
+                sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
+        }
+
+        return nents;
+}
+
+#define dma_unmap_sg(dev, sg, nents, dir)       do { } while (0)
+
+static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
+                                      unsigned long offset, size_t size,
+                                      enum dma_data_direction dir)
+{
+        return dma_map_single(dev, page_address(page) + offset, size, dir);
+}
+
+static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
+                                  size_t size, enum dma_data_direction dir)
+{
+        dma_unmap_single(dev, dma_address, size, dir);
+}
+
+static inline void dma_sync_single(struct device *dev, dma_addr_t dma_handle,
+                                   size_t size, enum dma_data_direction dir)
+{
+#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
+        if (dev->bus == &pci_bus_type)
+                return;
+#endif
+        dma_cache_sync(bus_to_virt(dma_handle), size, dir);
+}
+
+static inline void dma_sync_single_range(struct device *dev,
+                                         dma_addr_t dma_handle,
+                                         unsigned long offset, size_t size,
+                                         enum dma_data_direction dir)
+{
+#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
+        if (dev->bus == &pci_bus_type)
+                return;
+#endif
+        dma_cache_sync(bus_to_virt(dma_handle) + offset, size, dir);
+}
+
+static inline void dma_sync_sg(struct device *dev, struct scatterlist *sg,
+                               int nelems, enum dma_data_direction dir)
+{
+        int i;
+
+        for (i = 0; i < nelems; i++) {
+#if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
+                dma_cache_sync(page_address(sg[i].page) + sg[i].offset,
+                               sg[i].length, dir);
+#endif
+                sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
+        }
+}
+
+static inline void dma_sync_single_for_cpu(struct device *dev,
+                                           dma_addr_t dma_handle, size_t size,
+                                           enum dma_data_direction dir)
+        __attribute__ ((alias("dma_sync_single")));
+
+static inline void dma_sync_single_for_device(struct device *dev,
+                                           dma_addr_t dma_handle, size_t size,
+                                           enum dma_data_direction dir)
+        __attribute__ ((alias("dma_sync_single")));
+
+static inline void dma_sync_sg_for_cpu(struct device *dev,
+                                       struct scatterlist *sg, int nelems,
+                                       enum dma_data_direction dir)
+        __attribute__ ((alias("dma_sync_sg")));
+
+static inline void dma_sync_sg_for_device(struct device *dev,
+                                       struct scatterlist *sg, int nelems,
+                                       enum dma_data_direction dir)
+        __attribute__ ((alias("dma_sync_sg")));
+
+static inline int dma_get_cache_alignment(void)
+{
+        /*
+         * Each processor family will define its own L1_CACHE_SHIFT,
+         * L1_CACHE_BYTES wraps to this, so this is always safe.
+         */
+        return L1_CACHE_BYTES;
+}
+
+static inline int dma_mapping_error(dma_addr_t dma_addr)
+{
+        return dma_addr == 0;
+}
+
+#endif /* __ASM_SH_DMA_MAPPING_H */
+