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Date: Thu, 24 Jan 2008 16:03:13 +0100
From: monstr@...str.eu
To: monstr@...str.eu
Cc: linux-kernel@...r.kernel.org, stephen.neuendorffer@...inx.com,
john.williams@...alogix.com, microblaze-uclinux@...e.uq.edu.au
Subject: [PATCH 38/52] [microblaze] dma support
From: Michal Simek <monstr@...str.eu>
Signed-off-by: Michal Simek <monstr@...str.eu>
---
include/asm-microblaze/dma-mapping.h | 124 ++++++++++++++++++++++++++++++++++
include/asm-microblaze/dma.h | 21 ++++++
include/asm-microblaze/scatterlist.h | 21 ++++++
3 files changed, 166 insertions(+), 0 deletions(-)
create mode 100644 include/asm-microblaze/dma-mapping.h
create mode 100644 include/asm-microblaze/dma.h
create mode 100644 include/asm-microblaze/scatterlist.h
diff --git a/include/asm-microblaze/dma-mapping.h b/include/asm-microblaze/dma-mapping.h
new file mode 100644
index 0000000..defe1c4
--- /dev/null
+++ b/include/asm-microblaze/dma-mapping.h
@@ -0,0 +1,124 @@
+/*
+ * include/asm-microblaze/dma-mapping.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ */
+
+#ifndef _ASM_DMA_MAPPING_H
+#define _ASM_DMA_MAPPING_H
+
+#include <asm/io.h>
+#include <asm/bug.h>
+
+struct scatterlist;
+
+#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)
+
+void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *dma_handle);
+void consistent_free(void *vaddr);
+void consistent_sync(void *vaddr, size_t size, int direction);
+void consistent_sync_page(struct page *page, unsigned long offset,
+ size_t size, int direction);
+
+/* FIXME */
+static inline int
+dma_supported(struct device *dev, u64 mask)
+{
+ return 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 direction)
+{
+ BUG();
+ return 0;
+}
+
+static inline void
+dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+ enum dma_data_direction direction)
+{
+ BUG();
+}
+
+static inline int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+ enum dma_data_direction direction)
+{
+ BUG();
+ return 0;
+}
+
+static inline void
+dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+ enum dma_data_direction direction)
+{
+ BUG();
+}
+
+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();
+}
+
+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)
+{
+ BUG();
+}
+
+static inline void
+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+ enum dma_data_direction direction)
+{
+ BUG();
+}
+
+static inline int
+dma_mapping_error(dma_addr_t dma_addr)
+{
+ return 0;
+}
+
+static inline void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, int flag)
+{
+ return consistent_alloc(flag, size, dma_handle);
+}
+
+static inline void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ BUG();
+}
+
+static inline dma_addr_t
+dma_map_single(struct device *dev, void *ptr, size_t size,
+ enum dma_data_direction direction)
+{
+ BUG_ON(direction == DMA_NONE);
+
+ return virt_to_bus(ptr);
+}
+
+#define dma_unmap_single(dev, addr, size, dir) do { } while (0)
+
+
+#endif /* _ASM_DMA_MAPPING_H */
diff --git a/include/asm-microblaze/dma.h b/include/asm-microblaze/dma.h
new file mode 100644
index 0000000..a0c5c41
--- /dev/null
+++ b/include/asm-microblaze/dma.h
@@ -0,0 +1,21 @@
+/*
+ * include/asm-microblaze/dma.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ */
+
+#ifndef _ASM_DMA_H
+#define _ASM_DMA_H
+
+/* we don't have dma address limit. define it as zero to be
+ * unlimited. */
+#define MAX_DMA_ADDRESS (0)
+
+#define ISA_DMA_THRESHOLD (0)
+
+
+#endif /* _ASM_DMA_H */
diff --git a/include/asm-microblaze/scatterlist.h b/include/asm-microblaze/scatterlist.h
new file mode 100644
index 0000000..389bdc8
--- /dev/null
+++ b/include/asm-microblaze/scatterlist.h
@@ -0,0 +1,21 @@
+/*
+ * include/asm-microblaze/scatterlist.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ */
+
+#ifndef _ASM_SCATTERLIST_H
+#define _ASM_SCATTERLIST_H
+
+struct scatterlist {
+ unsigned long page_link;
+ unsigned int offset;
+ dma_addr_t dma_address;
+ unsigned int length;
+};
+
+#endif /* _ASM_SCATTERLIST_H */
--
1.5.4.rc4.14.g6fc74
--
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