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authorRobert P. J. Day <rpjday@crashcourse.ca>2008-02-04 22:29:54 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:20 -0800
commit82b12e232d2a71f566dca48df4ae4548e6d8d53d (patch)
treea727e6dbfe1764e0f684ea8248384e9ad9fdc6b9 /include/asm-frv/scatterlist.h
parent7038220aa511131f348018b85df172a21476fef9 (diff)
FRV: move DMA macros to scatterlist.h for consistency.
To be consistent with other architectures, these two DMA macros should be defined in scatterlist.h as opposed to dma-mapping.h Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-frv/scatterlist.h')
-rw-r--r--include/asm-frv/scatterlist.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/asm-frv/scatterlist.h b/include/asm-frv/scatterlist.h
index 2e7143b5a7a..4bca8a28546 100644
--- a/include/asm-frv/scatterlist.h
+++ b/include/asm-frv/scatterlist.h
@@ -31,6 +31,16 @@ struct scatterlist {
unsigned int length;
};
+/*
+ * These macros should be used after a pci_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)
+#define sg_dma_len(sg) ((sg)->length)
+
#define ISA_DMA_THRESHOLD (0xffffffffUL)
#endif /* !_ASM_SCATTERLIST_H */