[dpdk-stable] [PATCH 15/15] doc: add documentation for Virtio vDPA driver

[Maxime Coquelin]

Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
---
 doc/guides/nics/index.rst       |  1 +
 doc/guides/nics/virtio_vdpa.rst | 45 +++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 doc/guides/nics/virtio_vdpa.rst

diff --git a/doc/guides/nics/index.rst b/doc/guides/nics/index.rst
index 9fec02f3e..12aee63d7 100644
--- a/doc/guides/nics/index.rst
+++ b/doc/guides/nics/index.rst
@@ -55,6 +55,7 @@ Network Interface Controller Drivers
     thunderx
     vdev_netvsc
     virtio
+    virtio_vdpa
     vhost
     vmxnet3
     pcap_ring
diff --git a/doc/guides/nics/virtio_vdpa.rst b/doc/guides/nics/virtio_vdpa.rst
new file mode 100644
index 000000000..b708ef77e
--- /dev/null
+++ b/doc/guides/nics/virtio_vdpa.rst
@@ -0,0 +1,45 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2019 Red Hat, Inc.
+
+Virtio vDPA driver
+==================
+
+The Virtio vDPA driver provides support to either para-virtualized
+or fully HW offloaded Virtio-net devices.
+
+Pre-Installation Configuration
+------------------------------
+
+Config File Options
+~~~~~~~~~~~~~~~~~~~
+
+The following option can be modified in the ``config`` file.
+
+- ``CONFIG_RTE_VIRTIO_VDPA`` (default ``y`` for linux)
+
+Virtio vDPA Implementation
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To let the Virtio-net device being probed by the Virtio vDPA driver, adding
+"vdpa=1" parameter helps to specify that this device is to be used in vDPA
+mode, rather than polling mode, virtio pmd will skip when it detects this
+message. If no specified, device will not be used as a vDPA device, and it
+will be driven by virtio pmd.
+
+This driver requires the use of VFIO with IOMMU enabled, as a second level
+of addresses translation is required.
+
+Features
+--------
+
+Features of the Virtio vDPA driver are:
+
+- Compatibility with virtio 0.95, 1.0 and 1.1.
+- Multiqueue support.
+
+Prerequisites
+-------------
+
+- Platform with IOMMU feature. Virtio device needs address translation
+  service to Rx/Tx directly with virtio driver in VM or container.
+
-- 
2.21.0