sriov: Support of SRIOV and Qemu PCI passthrough

Generic support of SRIOV has been added. Virtual interfaces can be
used in multiplei scenarios instead of physical NICs. Virtual
functions can be directly accessed from VM by PCI passthrough method.
Another option is to use VFs with vSwtich to evaluate impact
on performance.
Additonal modifications:
* Automatic detection of NIC details has been added to simplify
configuration.
* Obsoleted configuration options have been removed.
* Logging usage within vsperf script was fixed.
* Vsperf main was refactored and final cleanup function added.
* Configurable forwarding mode of TestPMD executed inside VM.

JIRA: VSPERF-198
Change-Id: I4a0d5d262b245d433b12419de79399fb5825a623
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: Brian Castelli <brian.castelli@spirent.com>

2 files changed, 61 insertions, 2 deletions

diff --git a/docs/userguide/integration.rst b/docs/userguide/integration.rst
index 27bf2cd0..db9fdd0b 100755
--- a/docs/userguide/integration.rst
+++ b/docs/userguide/integration.rst
@@ -90,7 +90,6 @@ To run OVS NATIVE tunnel tests (VXLAN/GRE/GENEVE):
   .. code-block:: python
 
     VSWITCH = 'OvsVanilla'
-    VSWITCH_VANILLA_PHY_PORT_NAMES = ['nic1name', 'nic2name']
     # Specify vport_* kernel module to test.
     VSWITCH_VANILLA_KERNEL_MODULES = ['vport_vxlan',
                                       'vport_gre',
diff --git a/docs/userguide/testusage.rst b/docs/userguide/testusage.rst
index ac46ba3f..233f7015 100755
--- a/docs/userguide/testusage.rst
+++ b/docs/userguide/testusage.rst
@@ -199,7 +199,6 @@ for Vanilla OVS:
 .. code-block:: console
 
    VSWITCH = 'OvsVanilla'
-   VSWITCH_VANILLA_PHY_PORT_NAMES = ['$PORT1', '$PORT2']
 
 Where $PORT1 and $PORT2 are the Linux interfaces you'd like to bind
 to the vswitch.
@@ -309,6 +308,8 @@ To run tests using Vanilla OVS:
 
      $ ./vsperf --conf-file<path_to_custom_conf>/10_custom.conf
 
+.. _vfio-pci:
+
 Using vfio_pci with DPDK
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -346,6 +347,65 @@ To check that IOMMU is enabled on your platform:
     [    3.335746] IOMMU: dmar1 using Queued invalidation
     ....
 
+.. _SRIOV-support:
+
+Using SRIOV support
+^^^^^^^^^^^^^^^^^^^
+
+To use virtual functions of NIC with SRIOV support, use extended form
+of NIC PCI slot definition:
+
+.. code-block:: python
+
+    WHITELIST_NICS = ['0000:05:00.0|vf0', '0000:05:00.1|vf3']
+
+Where 'vf' is an indication of virtual function usage and following
+number defines a VF to be used. In case that VF usage is detected,
+then vswitchperf will enable SRIOV support for given card and it will
+detect PCI slot numbers of selected VFs.
+
+So in example above, one VF will be configured for NIC '0000:05:00.0'
+and four VFs will be configured for NIC '0000:05:00.1'. Vswitchperf
+will detect PCI addresses of selected VFs and it will use them during
+test execution.
+
+At the end of vswitchperf execution, SRIOV support will be disabled.
+
+SRIOV support is generic and it can be used in different testing scenarios.
+For example:
+
+* vSwitch tests with DPDK or without DPDK support to verify impact
+  of VF usage on vSwitch performance
+* tests without vSwitch, where traffic is forwared directly
+  between VF interfaces by packet forwarder (e.g. testpmd application)
+* tests without vSwitch, where VM accesses VF interfaces directly
+  by PCI-passthrough_ to measure raw VM throughput performance.
+
+.. _PCI-passthrough:
+
+Using QEMU with PCI passthrough support
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Raw virtual machine throughput performance can be measured by execution of PVP
+test with direct access to NICs by PCI passthrough. To execute VM with direct
+access to PCI devices, enable vfio-pci_. In order to use virtual functions,
+SRIOV-support_ must be enabled.
+
+Execution of test with PCI passthrough with vswitch disabled:
+
+.. code-block:: console
+
+    $ ./vsperf --conf-file=<path_to_custom_conf>/10_custom.conf
+               --vswtich none --vnf QemuPciPassthrough pvp_tput
+
+Any of supported guest-loopback-application_ can be used inside VM with
+PCI passthrough support.
+
+Note: Qemu with PCI passthrough support can be used only with PVP test
+deployment.
+
+.. _guest-loopback-application:
+
 Selection of loopback application for PVP and PVVP tests
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^