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authorChristoph Hellwig <hch@lst.de>2018-05-19 08:58:51 +0200
committerChristoph Hellwig <hch@lst.de>2018-09-08 11:17:32 +0200
commitf406f222d4b21e63b0ad24d4ddcb2b9745177b55 (patch)
treeb3a51cd0ea52c459b2f7f6c82c5b903e7412b7de /arch/hexagon/kernel
parenthexagon: remove the sync_single_for_cpu DMA operation (diff)
downloadlinux-dev-f406f222d4b21e63b0ad24d4ddcb2b9745177b55.tar.xz
linux-dev-f406f222d4b21e63b0ad24d4ddcb2b9745177b55.zip
hexagon: implement the sync_sg_for_device DMA operation
This methods needs to provide the equivalent of sync_single_for_device for each S/G list element, but was missing. Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'arch/hexagon/kernel')
-rw-r--r--arch/hexagon/kernel/dma.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/hexagon/kernel/dma.c b/arch/hexagon/kernel/dma.c
index d2b717f352f4..9e46556a227d 100644
--- a/arch/hexagon/kernel/dma.c
+++ b/arch/hexagon/kernel/dma.c
@@ -188,6 +188,18 @@ static void hexagon_sync_single_for_device(struct device *dev,
dma_sync(dma_addr_to_virt(dma_handle), size, dir);
}
+static void hexagon_sync_sg_for_device(struct device *dev,
+ struct scatterlist *sgl, int nents, enum dma_data_direction dir)
+{
+ struct scatterlist *sg;
+ int i;
+
+ for_each_sg(sgl, sg, nents, i)
+ hexagon_sync_single_for_device(dev, sg_dma_address(sg),
+ sg->length, dir);
+}
+
+
static int hexagon_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return dma_addr == HEXAGON_MAPPING_ERROR;
@@ -199,6 +211,7 @@ const struct dma_map_ops hexagon_dma_ops = {
.map_sg = hexagon_map_sg,
.map_page = hexagon_map_page,
.sync_single_for_device = hexagon_sync_single_for_device,
+ .sync_sg_for_device = hexagon_sync_sg_for_device,
.mapping_error = hexagon_mapping_error,
};