#ifndef _ASM_SPARC64_DMA_MAPPING_H
#define _ASM_SPARC64_DMA_MAPPING_H
-
-#ifdef CONFIG_PCI
-
-/* we implement the API below in terms of the existing PCI one,
- * so include it */
-#include <linux/pci.h>
-/* need struct page definitions */
+#include <linux/scatterlist.h>
#include <linux/mm.h>
-#include <asm/of_device.h>
-
-static inline int
-dma_supported(struct device *dev, u64 mask)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- return pci_dma_supported(to_pci_dev(dev), mask);
-}
-
-static inline int
-dma_set_mask(struct device *dev, u64 dma_mask)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
-}
-
-static inline void *
-dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
- gfp_t flag)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- return pci_iommu_ops->alloc_consistent(to_pci_dev(dev), size, dma_handle, flag);
-}
-
-static inline void
-dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
- dma_addr_t dma_handle)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle);
-}
-
-static inline dma_addr_t
-dma_map_single(struct device *dev, void *cpu_addr, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction);
-}
-
-static inline void
-dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction);
-}
-
-static inline dma_addr_t
-dma_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction);
-}
-
-static inline void
-dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction);
-}
-
-static inline int
-dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction direction)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
-}
-
-static inline void
-dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
- enum dma_data_direction direction)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction);
-}
-
-static inline void
-dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
- size, (int)direction);
-}
-
-static inline void
-dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
+#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
+
+struct dma_ops {
+ void *(*alloc_coherent)(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flag);
+ void (*free_coherent)(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_handle);
+ dma_addr_t (*map_single)(struct device *dev, void *cpu_addr,
+ size_t size,
+ enum dma_data_direction direction);
+ void (*unmap_single)(struct device *dev, dma_addr_t dma_addr,
+ size_t size,
+ enum dma_data_direction direction);
+ int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents,
+ enum dma_data_direction direction);
+ void (*unmap_sg)(struct device *dev, struct scatterlist *sg,
+ int nhwentries,
+ enum dma_data_direction direction);
+ void (*sync_single_for_cpu)(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction direction);
+ void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg,
+ int nelems,
+ enum dma_data_direction direction);
+};
+extern const struct dma_ops *dma_ops;
+
+extern int dma_supported(struct device *dev, u64 mask);
+extern int dma_set_mask(struct device *dev, u64 dma_mask);
- pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
- size, (int)direction);
-}
-
-static inline void
-dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
- enum dma_data_direction direction)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction);
-}
-
-static inline void
-dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
- enum dma_data_direction direction)
-{
- BUG_ON(dev->bus != &pci_bus_type &&
- dev->bus != &ebus_bus_type);
-
- pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction);
-}
-
-static inline int
-dma_mapping_error(dma_addr_t dma_addr)
+static inline void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flag)
{
- return pci_dma_mapping_error(dma_addr);
+ return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
}
-#else
-
-struct device;
-struct page;
-struct scatterlist;
-
-static inline int
-dma_supported(struct device *dev, u64 mask)
+static inline void dma_free_coherent(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_handle)
{
- BUG();
- return 0;
+ dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
}
-static inline int
-dma_set_mask(struct device *dev, u64 dma_mask)
+static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
+ size_t size,
+ enum dma_data_direction direction)
{
- BUG();
- return 0;
+ return dma_ops->map_single(dev, cpu_addr, size, direction);
}
-static inline void *dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag)
+static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
+ size_t size,
+ enum dma_data_direction direction)
{
- BUG();
- return NULL;
+ dma_ops->unmap_single(dev, dma_addr, size, direction);
}
-static inline void dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle)
+static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction direction)
{
- BUG();
+ return dma_ops->map_single(dev, page_address(page) + offset,
+ size, direction);
}
-static inline dma_addr_t
-dma_map_single(struct device *dev, void *cpu_addr, size_t size,
- enum dma_data_direction direction)
+static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
+ size_t size,
+ enum dma_data_direction direction)
{
- BUG();
- return 0;
+ dma_ops->unmap_single(dev, dma_address, size, direction);
}
-static inline void
-dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction direction)
+static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction direction)
{
- BUG();
+ return dma_ops->map_sg(dev, sg, nents, direction);
}
-static inline dma_addr_t
-dma_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction direction)
+static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction direction)
{
- BUG();
- return 0;
+ dma_ops->unmap_sg(dev, sg, nents, direction);
}
-static inline void
-dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
- enum dma_data_direction direction)
+static inline void dma_sync_single_for_cpu(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction direction)
{
- BUG();
+ dma_ops->sync_single_for_cpu(dev, dma_handle, size, direction);
}
-static inline int
-dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction direction)
+static inline void dma_sync_single_for_device(struct device *dev,
+ dma_addr_t dma_handle,
+ size_t size,
+ enum dma_data_direction direction)
{
- BUG();
- return 0;
+ /* No flushing needed to sync cpu writes to the device. */
}
-static inline void
-dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
- enum dma_data_direction direction)
+static inline 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)
{
- BUG();
+ dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
}
-static inline void
-dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
- enum dma_data_direction direction)
+static inline 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)
{
- BUG();
+ /* No flushing needed to sync cpu writes to the device. */
}
-static inline void
-dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
- enum dma_data_direction direction)
-{
- BUG();
-}
-static inline void
-dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
- enum dma_data_direction direction)
+static inline void dma_sync_sg_for_cpu(struct device *dev,
+ struct scatterlist *sg, int nelems,
+ enum dma_data_direction direction)
{
- BUG();
+ dma_ops->sync_sg_for_cpu(dev, sg, nelems, direction);
}
-static inline void
-dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
- enum dma_data_direction direction)
+static inline void dma_sync_sg_for_device(struct device *dev,
+ struct scatterlist *sg, int nelems,
+ enum dma_data_direction direction)
{
- BUG();
+ /* No flushing needed to sync cpu writes to the device. */
}
-static inline int
-dma_mapping_error(dma_addr_t dma_addr)
+static inline int dma_mapping_error(dma_addr_t dma_addr)
{
- BUG();
- return 0;
+ return (dma_addr == DMA_ERROR_CODE);
}
-#endif /* PCI */
-
-
-/* Now for the API extensions over the pci_ one */
-
-#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)
-#define dma_is_consistent(d, h) (1)
-
-static inline int
-dma_get_cache_alignment(void)
+static inline int dma_get_cache_alignment(void)
{
/* no easy way to get cache size on all processors, so return
* the maximum possible, to be safe */
return (1 << INTERNODE_CACHE_SHIFT);
}
-static inline 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)
-{
- /* just sync everything, that's all the pci API can do */
- dma_sync_single_for_cpu(dev, dma_handle, offset+size, direction);
-}
-
-static inline 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)
-{
- /* just sync everything, that's all the pci API can do */
- dma_sync_single_for_device(dev, dma_handle, offset+size, direction);
-}
-
-static inline void
-dma_cache_sync(struct device *dev, void *vaddr, size_t size,
- enum dma_data_direction direction)
-{
- /* could define this in terms of the dma_cache ... operations,
- * but if you get this on a platform, you should convert the platform
- * to using the generic device DMA API */
- 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)
+#define dma_is_consistent(d, h) (1)
#endif /* _ASM_SPARC64_DMA_MAPPING_H */
projects / linux-2.6-omap-h63xx.git / blobdiff