From: Chuck Lever <chuck.lever@xxxxxxxxxx>
Cc: iommu@xxxxxxxxxxxxxxx
Cc: linux-rdma@xxxxxxxxxxxxxxx
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
include/rdma/ib_verbs.h | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 533ab92684d8..5e205fda90f9 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -4220,6 +4220,35 @@ static inline void ib_dma_unmap_sg(struct ib_device *dev,
ib_dma_unmap_sg_attrs(dev, sg, nents, direction, 0);
}
+/**
+ * ib_dma_map_sg - Map an array of bio_vecs to DMA addresses
+ * @dev: The device for which the DMA addresses are to be created
+ * @bvecs: The array of bio_vec entries to map
+ * @nents: The number of entries in the array
+ * @direction: The direction of the DMA
+ */
+static inline int ib_dma_map_bvecs(struct ib_device *dev,
+ struct bio_vec *bvecs, int nents,
+ enum dma_data_direction direction)
+{
+ return dma_map_bvecs_attrs(dev->dma_device, bvecs, nents, direction, 0);
+}
+
+/**
+ * ib_dma_unmap_bvecs - Unmap a DMA-mapped bio_vec array
+ * @dev: The device for which the DMA addresses were created
+ * @bvecs: The array of bio_vec entries to unmap
+ * @nents: The number of entries in the array
+ * @direction: The direction of the DMA
+ */
+static inline void ib_dma_unmap_bvec(struct ib_device *dev,
+ struct bio_vec *bvecs, int nents,
+ enum dma_data_direction direction)
+{
+ if (!ib_uses_virt_dma(dev))
+ dma_unmap_bvecs_attrs(dev->dma_device, bvecs, nents, direction);
+}
+
/**
* ib_dma_max_seg_size - Return the size limit of a single DMA transfer
* @dev: The device to query
