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authorDavid Daney <ddaney@caviumnetworks.com>2010-10-02 00:27:32 +0400
committerRalf Baechle <ralf@linux-mips.org>2010-10-29 22:08:31 +0400
commit48e1fd5a81416a037f5a48120bf281102f2584e2 (patch)
treec5c4bd344f50493bb1d1c36d485300e9061c5aa2 /arch/mips/include/asm/dma-mapping.h
parent43e4f7ae4b4a96b5e84f6e1592d2e9353138e88c (diff)
downloadlinux-48e1fd5a81416a037f5a48120bf281102f2584e2.tar.xz
MIPS: Convert DMA to use dma-mapping-common.h
Use asm-generic/dma-mapping-common.h to handle all DMA mapping operations and establish a default get_dma_ops() that forwards all operations to the existing code. Augment dev_archdata to carry a pointer to the struct dma_map_ops, allowing DMA operations to be overridden on a per device basis. Currently this is never filled in, so the default dma_map_ops are used. A follow-on patch sets this for Octeon PCI devices. Also initialize the dma_debug system as it is now used if it is configured. Includes fixes by Kevin Cernekee <cernekee@gmail.com>. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Patchwork: http://patchwork.linux-mips.org/patch/1637/ Patchwork: http://patchwork.linux-mips.org/patch/1678/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/dma-mapping.h')
-rw-r--r--arch/mips/include/asm/dma-mapping.h96
1 files changed, 58 insertions, 38 deletions
diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h
index 18fbf7af8e93..655f849bd08d 100644
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -5,51 +5,41 @@
#include <asm/cache.h>
#include <asm-generic/dma-coherent.h>
-void *dma_alloc_noncoherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag);
+#include <dma-coherence.h>
-void dma_free_noncoherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle);
+extern struct dma_map_ops *mips_dma_map_ops;
-void *dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag);
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+ if (dev && dev->archdata.dma_ops)
+ return dev->archdata.dma_ops;
+ else
+ return mips_dma_map_ops;
+}
-void dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle);
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
+{
+ if (!dev->dma_mask)
+ return 0;
-extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
- enum dma_data_direction direction);
-extern 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);
-
-static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
- size_t size, enum dma_data_direction direction)
+ return addr + size <= *dev->dma_mask;
+}
+
+static inline void dma_mark_clean(void *addr, size_t size) {}
+
+#include <asm-generic/dma-mapping-common.h>
+
+static inline int dma_supported(struct device *dev, u64 mask)
{
- dma_unmap_single(dev, dma_address, size, direction);
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ return ops->dma_supported(dev, mask);
}
-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);
-extern int dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
-extern int dma_supported(struct device *dev, u64 mask);
+static inline int dma_mapping_error(struct device *dev, u64 mask)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ return ops->mapping_error(dev, mask);
+}
static inline int
dma_set_mask(struct device *dev, u64 mask)
@@ -65,4 +55,34 @@ dma_set_mask(struct device *dev, u64 mask)
extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction);
+static inline void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp)
+{
+ void *ret;
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ ret = ops->alloc_coherent(dev, size, dma_handle, gfp);
+
+ debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
+
+ return ret;
+}
+
+static inline void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ ops->free_coherent(dev, size, vaddr, dma_handle);
+
+ debug_dma_free_coherent(dev, size, vaddr, dma_handle);
+}
+
+
+void *dma_alloc_noncoherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flag);
+
+void dma_free_noncoherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle);
+
#endif /* _ASM_DMA_MAPPING_H */