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authorPaul Mundt <lethal@linux-sh.org>2008-07-29 08:09:44 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-07-29 08:09:44 +0900
commitf15cbe6f1a4b4d9df59142fc8e4abb973302cf44 (patch)
tree774d7b11abaaf33561ab8268bf51ddd9ceb79025 /arch/sh/include/asm/dma-mapping.h
parent25326277d8d1393d1c66240e6255aca780f9e3eb (diff)
downloadlinux-f15cbe6f1a4b4d9df59142fc8e4abb973302cf44.tar.gz
sh: migrate to arch/sh/include/
This follows the sparc changes a439fe51a1f8eb087c22dd24d69cebae4a3addac. Most of the moving about was done with Sam's directions at: http://marc.info/?l=linux-sh&m=121724823706062&w=2 with subsequent hacking and fixups entirely my fault. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include/asm/dma-mapping.h')
-rw-r--r--arch/sh/include/asm/dma-mapping.h192
1 files changed, 192 insertions, 0 deletions
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
new file mode 100644
index 000000000000..6c0b8a2de143
--- /dev/null
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -0,0 +1,192 @@
+#ifndef __ASM_SH_DMA_MAPPING_H
+#define __ASM_SH_DMA_MAPPING_H
+
+#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <asm/cacheflush.h>
+#include <asm/io.h>
+
+extern struct bus_type pci_bus_type;
+
+#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;
+}
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flag);
+
+void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle);
+
+void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+ enum dma_data_direction dir);
+
+#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 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_phys(ptr);
+#endif
+ dma_cache_sync(dev, ptr, size, dir);
+
+ return virt_to_phys(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(dev, sg_virt(&sg[i]), sg[i].length, dir);
+#endif
+ sg[i].dma_address = sg_phys(&sg[i]);
+ }
+
+ 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(dev, phys_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(dev, phys_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(dev, sg_virt(&sg[i]), sg[i].length, dir);
+#endif
+ sg[i].dma_address = sg_phys(&sg[i]);
+ }
+}
+
+static inline void dma_sync_single_for_cpu(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction dir)
+{
+ dma_sync_single(dev, dma_handle, size, dir);
+}
+
+static inline void dma_sync_single_for_device(struct device *dev,
+ dma_addr_t dma_handle,
+ size_t size,
+ enum dma_data_direction dir)
+{
+ dma_sync_single(dev, dma_handle, size, dir);
+}
+
+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)
+{
+ 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)
+{
+ dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
+}
+
+
+static inline void dma_sync_sg_for_cpu(struct device *dev,
+ struct scatterlist *sg, int nelems,
+ enum dma_data_direction dir)
+{
+ dma_sync_sg(dev, sg, nelems, dir);
+}
+
+static inline void dma_sync_sg_for_device(struct device *dev,
+ struct scatterlist *sg, int nelems,
+ enum dma_data_direction dir)
+{
+ dma_sync_sg(dev, sg, nelems, dir);
+}
+
+
+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(struct device *dev, dma_addr_t dma_addr)
+{
+ return dma_addr == 0;
+}
+
+#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
+
+extern int
+dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+ dma_addr_t device_addr, size_t size, int flags);
+
+extern void
+dma_release_declared_memory(struct device *dev);
+
+extern void *
+dma_mark_declared_memory_occupied(struct device *dev,
+ dma_addr_t device_addr, size_t size);
+
+#endif /* __ASM_SH_DMA_MAPPING_H */