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hexagon: implement the sync_sg_for_device DMA operation

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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>
This commit is contained in:
Christoph Hellwig 2018-05-19 08:58:51 +02:00
parent 37fca4bd01
commit f406f222d4
1 changed files with 13 additions and 0 deletions
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13
arch/hexagon/kernel/dma.c
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@ -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,
};