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authorJonas Bonn <jonas@southpole.se>2011-09-05 15:47:10 +0400
committerJonas Bonn <jonas@southpole.se>2011-09-11 11:50:39 +0400
commit707b38a00bd2e7cac60afc75abe826e68ca83cfb (patch)
tree55036c3fc4312d3a43dfac4344c798c2e77f601f /arch/openrisc/kernel/dma.c
parentd7cb6667090511755fc8bb294982783b087baef7 (diff)
downloadlinux-707b38a00bd2e7cac60afc75abe826e68ca83cfb.tar.xz
Add missing DMA ops
For the initial architecture submission, not all of the DMA ops were implemented. This patch adds the *map_page and *map_sg variants of the DMA mapping ops. This patch is currently of interest mainly to some drivers that haven't been submitted upstream yet. Signed-off-by: Jonas Bonn <jonas@southpole.se>
Diffstat (limited to 'arch/openrisc/kernel/dma.c')
-rw-r--r--arch/openrisc/kernel/dma.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/arch/openrisc/kernel/dma.c b/arch/openrisc/kernel/dma.c
index 968d3ee477e3..f1c8ee2895d0 100644
--- a/arch/openrisc/kernel/dma.c
+++ b/arch/openrisc/kernel/dma.c
@@ -154,6 +154,33 @@ void or1k_unmap_page(struct device *dev, dma_addr_t dma_handle,
/* Nothing special to do here... */
}
+int or1k_map_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ struct scatterlist *s;
+ int i;
+
+ for_each_sg(sg, s, nents, i) {
+ s->dma_address = or1k_map_page(dev, sg_page(s), s->offset,
+ s->length, dir, NULL);
+ }
+
+ return nents;
+}
+
+void or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ struct scatterlist *s;
+ int i;
+
+ for_each_sg(sg, s, nents, i) {
+ or1k_unmap_page(dev, sg_dma_address(s), sg_dma_len(s), dir, NULL);
+ }
+}
+
void or1k_sync_single_for_cpu(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction dir)
@@ -187,5 +214,4 @@ static int __init dma_init(void)
return 0;
}
-
fs_initcall(dma_init);