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- #ifndef __ASM_SH_DMA_MAPPING_H
- #define __ASM_SH_DMA_MAPPING_H
-
- #include <linux/mm.h>
- #include <asm/scatterlist.h>
- #include <asm/cacheflush.h>
- #include <asm/io.h>
-
- extern struct bus_type pci_bus_type;
-
- /* arch/sh/mm/consistent.c */
- extern void *consistent_alloc(gfp_t 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, gfp_t 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 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 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 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 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 */
-
-