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authorAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
committerAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
commitb4b6116a13633898cf868f2f103c96a90c4c20f8 (patch)
tree93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/tile/include/asm/dma-mapping.h
parentedd4be777c953e5faafc80d091d3084b4343f5d3 (diff)
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fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/tile/include/asm/dma-mapping.h')
-rw-r--r--arch/tile/include/asm/dma-mapping.h94
1 files changed, 94 insertions, 0 deletions
diff --git a/arch/tile/include/asm/dma-mapping.h b/arch/tile/include/asm/dma-mapping.h
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+++ b/arch/tile/include/asm/dma-mapping.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef _ASM_TILE_DMA_MAPPING_H
+#define _ASM_TILE_DMA_MAPPING_H
+
+#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <linux/cache.h>
+#include <linux/io.h>
+
+/*
+ * Note that on x86 and powerpc, there is a "struct dma_mapping_ops"
+ * that is used for all the DMA operations. For now, we don't have an
+ * equivalent on tile, because we only have a single way of doing DMA.
+ * (Tilera bug 7994 to use dma_mapping_ops.)
+ */
+
+#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)
+
+extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+ enum dma_data_direction);
+extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
+ size_t size, enum dma_data_direction);
+extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+ enum dma_data_direction);
+extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+ int nhwentries, enum dma_data_direction);
+extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction);
+extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
+ size_t size, enum dma_data_direction);
+extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
+ int nelems, enum dma_data_direction);
+extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+ int nelems, enum dma_data_direction);
+
+
+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);
+
+extern void dma_sync_single_for_cpu(struct device *, dma_addr_t, size_t,
+ enum dma_data_direction);
+extern void dma_sync_single_for_device(struct device *, dma_addr_t,
+ size_t, enum dma_data_direction);
+extern void dma_sync_single_range_for_cpu(struct device *, dma_addr_t,
+ unsigned long offset, size_t,
+ enum dma_data_direction);
+extern void dma_sync_single_range_for_device(struct device *, dma_addr_t,
+ unsigned long offset, size_t,
+ enum dma_data_direction);
+extern void dma_cache_sync(struct device *dev, void *vaddr, size_t,
+ enum dma_data_direction);
+
+static inline int
+dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ return 0;
+}
+
+static inline int
+dma_supported(struct device *dev, u64 mask)
+{
+ return 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;
+}
+
+#endif /* _ASM_TILE_DMA_MAPPING_H */