From: "Edgar E. Iglesias" <edgar.iglesias@xxxxxxxxxx>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xxxxxxxxxx>
---
drivers/virtio/virtio_ring.c | 18 ++++++++++++++++++
include/linux/virtio.h | 10 ++++++++++
2 files changed, 28 insertions(+)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 233f3c6..dd6c640 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -323,6 +323,15 @@ int virtqueue_add_outbuf(struct virtqueue *vq,
}
EXPORT_SYMBOL_GPL(virtqueue_add_outbuf);
+int dma_virtqueue_add_outbuf(struct virtqueue *vq,
+ struct scatterlist *sg, unsigned int num,
+ void *data,
+ gfp_t gfp)
+{
+ return virtqueue_add(vq, &sg, num, 1, 0, data, gfp, true);
+}
+EXPORT_SYMBOL_GPL(dma_virtqueue_add_outbuf);
+
/**
* virtqueue_add_inbuf - expose input buffers to other end
* @vq: the struct virtqueue we're talking about.
@@ -345,6 +354,15 @@ int virtqueue_add_inbuf(struct virtqueue *vq,
}
EXPORT_SYMBOL_GPL(virtqueue_add_inbuf);
+int dma_virtqueue_add_inbuf(struct virtqueue *vq,
+ struct scatterlist *sg, unsigned int num,
+ void *data,
+ gfp_t gfp)
+{
+ return virtqueue_add(vq, &sg, num, 0, 1, data, gfp, true);
+}
+EXPORT_SYMBOL_GPL(dma_virtqueue_add_inbuf);
+
/**
* virtqueue_kick_prepare - first half of split virtqueue_kick call.
* @vq: the struct virtqueue
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 8f4d4bf..c31b3e2 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -34,6 +34,16 @@ struct virtqueue {
void *priv;
};
+int dma_virtqueue_add_outbuf(struct virtqueue *vq,
+ struct scatterlist sg[], unsigned int num,
+ void *data,
+ gfp_t gfp);
+
+int dma_virtqueue_add_inbuf(struct virtqueue *vq,
+ struct scatterlist sg[], unsigned int num,
+ void *data,
+ gfp_t gfp);
+
int virtqueue_add_outbuf(struct virtqueue *vq,
struct scatterlist sg[], unsigned int num,
void *data,
--
1.9.1
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