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-rw-r--r--kernel/arch/s390/include/asm/dma-mapping.h90
1 files changed, 90 insertions, 0 deletions
diff --git a/kernel/arch/s390/include/asm/dma-mapping.h b/kernel/arch/s390/include/asm/dma-mapping.h
new file mode 100644
index 000000000..9d395961e
--- /dev/null
+++ b/kernel/arch/s390/include/asm/dma-mapping.h
@@ -0,0 +1,90 @@
+#ifndef _ASM_S390_DMA_MAPPING_H
+#define _ASM_S390_DMA_MAPPING_H
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-attrs.h>
+#include <linux/dma-debug.h>
+#include <linux/io.h>
+
+#define DMA_ERROR_CODE (~(dma_addr_t) 0x0)
+
+extern struct dma_map_ops s390_dma_ops;
+
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+ return &s390_dma_ops;
+}
+
+extern int dma_set_mask(struct device *dev, u64 mask);
+
+static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+ enum dma_data_direction direction)
+{
+}
+
+#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)
+
+#include <asm-generic/dma-mapping-common.h>
+
+static inline int dma_supported(struct device *dev, u64 mask)
+{
+ struct dma_map_ops *dma_ops = get_dma_ops(dev);
+
+ if (dma_ops->dma_supported == NULL)
+ return 1;
+ return dma_ops->dma_supported(dev, mask);
+}
+
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
+{
+ if (!dev->dma_mask)
+ return false;
+ return addr + size - 1 <= *dev->dma_mask;
+}
+
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ struct dma_map_ops *dma_ops = get_dma_ops(dev);
+
+ debug_dma_mapping_error(dev, dma_addr);
+ if (dma_ops->mapping_error)
+ return dma_ops->mapping_error(dev, dma_addr);
+ return dma_addr == DMA_ERROR_CODE;
+}
+
+#define dma_alloc_coherent(d, s, h, f) dma_alloc_attrs(d, s, h, f, NULL)
+
+static inline void *dma_alloc_attrs(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flags,
+ struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ void *cpu_addr;
+
+ BUG_ON(!ops);
+
+ cpu_addr = ops->alloc(dev, size, dma_handle, flags, attrs);
+ debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
+
+ return cpu_addr;
+}
+
+#define dma_free_coherent(d, s, c, h) dma_free_attrs(d, s, c, h, NULL)
+
+static inline void dma_free_attrs(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_handle,
+ struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!ops);
+
+ debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
+ ops->free(dev, size, cpu_addr, dma_handle, attrs);
+}
+
+#endif /* _ASM_S390_DMA_MAPPING_H */