From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Edgar E. Iglesias" Subject: [RFC 3/4] virtio: Add dma variants of virtqueue_add_in and outbuf Date: Fri, 1 May 2015 15:01:46 +1000 Message-ID: <1430456507-26862-4-git-send-email-edgar.iglesias@gmail.com> References: <1430456507-26862-1-git-send-email-edgar.iglesias@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1430456507-26862-1-git-send-email-edgar.iglesias@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: virtualization@lists.linux-foundation.org Cc: edgar.iglesias@xilinx.com, linux@arm.linux.org.uk, mst@redhat.com, michal.simek@xilinx.com, j.wu@xilinx.com List-Id: virtualization@lists.linuxfoundation.org From: "Edgar E. Iglesias" Signed-off-by: Edgar E. Iglesias --- 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