[PATCH] powerpc: merge scatterlist.h

This depends on the 64bit dma_addr_t patch.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/include/asm-powerpc/scatterlist.h b/include/asm-powerpc/scatterlist.h
new file mode 100644
index 000000000000..8c992d1491d4
--- /dev/null
+++ b/include/asm-powerpc/scatterlist.h
@@ -0,0 +1,45 @@
+#ifndef _ASM_POWERPC_SCATTERLIST_H
+#define _ASM_POWERPC_SCATTERLIST_H
+/*
+ * Copyright (C) 2001 PPC64 Team, IBM Corp
+ *
+ * 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; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifdef __KERNEL__
+#include <linux/types.h>
+#include <asm/dma.h>
+
+struct scatterlist {
+        struct page *page;
+        unsigned int offset;
+        unsigned int length;
+
+        /* For TCE support */
+        dma_addr_t dma_address;
+        u32 dma_length;
+};
+
+/*
+ * These macros should be used after a dma_map_sg call has been done
+ * to get bus addresses of each of the SG entries and their lengths.
+ * You should only work with the number of sg entries pci_map_sg
+ * returns, or alternatively stop on the first sg_dma_len(sg) which
+ * is 0.
+ */
+#define sg_dma_address(sg)      ((sg)->dma_address)
+#ifdef __powerpc64__
+#define sg_dma_len(sg)          ((sg)->dma_length)
+#else
+#define sg_dma_len(sg)          ((sg)->length)
+#endif
+
+#ifdef __powerpc64__
+#define ISA_DMA_THRESHOLD       (~0UL)
+#endif
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_SCATTERLIST_H */