[spp] [PATCH 03/28] docs: add spp_vf overview

[ogawa.yasufumi at lab.ntt.co.jp]

From: Yasufumi Ogawa <ogawa.yasufumi at lab.ntt.co.jp>

Signed-off-by: Yasufumi Ogawa <ogawa.yasufumi at lab.ntt.co.jp>
---
 .../spp_vf/{getting_started => gsg}/index.rst      |    0
 docs/guides/spp_vf/images/spp_vf_overview.svg      | 1944 ++++++++++++++++++++
 docs/guides/spp_vf/overview.rst                    |   26 +-
 3 files changed, 1969 insertions(+), 1 deletion(-)
 rename docs/guides/spp_vf/{getting_started => gsg}/index.rst (100%)
 create mode 100644 docs/guides/spp_vf/images/spp_vf_overview.svg

diff --git a/docs/guides/spp_vf/getting_started/index.rst b/docs/guides/spp_vf/gsg/index.rst
similarity index 100%
rename from docs/guides/spp_vf/getting_started/index.rst
rename to docs/guides/spp_vf/gsg/index.rst
diff --git a/docs/guides/spp_vf/images/spp_vf_overview.svg b/docs/guides/spp_vf/images/spp_vf_overview.svg
new file mode 100644
index 0000000..3b1ae68
--- /dev/null
+++ b/docs/guides/spp_vf/images/spp_vf_overview.svg
@@ -0,0 +1,1944 @@
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diff --git a/docs/guides/spp_vf/overview.rst b/docs/guides/spp_vf/overview.rst
index e6f83ea..f1a1714 100644
--- a/docs/guides/spp_vf/overview.rst
+++ b/docs/guides/spp_vf/overview.rst
@@ -32,4 +32,28 @@
 Overview
 ========
 
-SPP_VF
+SPP_VF provides SR-IOV like network functionality using DPDK for NFV.
+
+PP_VF distributes incoming packets to VMs with referring to virtual
+MAC address like Virtual Function(VF) of SR-IOV.
+Virtual MAC address can be defined by commands from spp
+controller(``spp_vf.py``).
+
+SPP_VF is multi-process and multi-thread applications. A SPP_VF process
+is referred to as ``spp_vf`` in this document. Each ``spp_vf`` has
+one manager thread and component threads. The manager thread provides
+function for command processing and creating the component threads.
+The component threads have its own multiple components, ports and
+classifier tables including Virtual MAC address.
+
+
+This is an example of network configuration, in which one
+``classifier_mac``,
+one merger and four forwarders are running in SPP_VF process
+for two destinations of vhost interface.
+Incoming packets from rx on host1 are sent to each of vhosts of VM
+by looking up destination MAC address in the packet.
+
+.. image:: images/spp_vf_overview.svg
+   :height: 550 em
+   :width: 550 em
-- 
2.13.1