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authorStephen Rothwell <sfr@canb.auug.org.au>2005-10-25 16:59:03 +1000
committerPaul Mackerras <paulus@samba.org>2005-10-27 16:45:52 +1000
commit89edce0b4e71f6f78e27d7c18c63e957469b74d3 (patch)
tree15d9c66f27aa86c27435b83d3cda8418d6cf22f1 /include/asm-powerpc/scatterlist.h
parent8168f902fa9c2ca8930ea8d72cce283234df03b8 (diff)
downloadop-kernel-dev-89edce0b4e71f6f78e27d7c18c63e957469b74d3.zip
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[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>
Diffstat (limited to 'include/asm-powerpc/scatterlist.h')
-rw-r--r--include/asm-powerpc/scatterlist.h45
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 0000000..8c992d1
--- /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 */
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