.. Copyright (c) <2019>, Intel Corporation
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.

   - Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in
     the documentation and/or other materials provided with the
     distribution.

   - Neither the name of Intel Corporation nor the names of its
     contributors may be used to endorse or promote products derived
     from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   OF THE POSSIBILITY OF SUCH DAMAGE.

=================================================================
vhost/virtio loopback with multi-paths and port restart test plan
=================================================================

This test plan includes split virtqueue in-order mergeable, in-order non-mergeable, mergeable, non-mergeable, vector_rx path, and packed virtqueue vm2vm in-order mergeable, in-order non-mergeable, mergeable, non-mergeable path test. Also test port restart and only send one packet each time using testpmd.

Test Case 1: loopback test with packed ring mergeable path
==========================================================

1. Launch vhost by below command::

    rm -rf vhost-net*
    ./testpmd -n 4 -l 2-4  --socket-mem 1024,1024 --legacy-mem --no-pci \
    --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net,queues=1,client=0' -- -i --nb-cores=1 --txd=1024 --rxd=1024
    testpmd>set fwd mac

2. Launch virtio-user by below command::

    ./testpmd -n 4 -l 5-6 --socket-mem 1024,1024 \
    --legacy-mem --no-pci --file-prefix=virtio \
    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,packed_vq=1,mrg_rxbuf=1,in_order=0 \
    -- -i --tx-offloads=0x0 --enable-hw-vlan-strip --rss-ip --nb-cores=1 --txd=1024 --rxd=1024
    >set fwd mac
    >start

3. Send packets with vhost-testpmd,[frame_size] is the parameter changs in [64, 128, 256, 512, 1024, 1518]::

    testpmd>set txpkts [frame_size]
    testpmd>start tx_first 32

4. Repeat below command to get throughput 10 times,then calculate the average throughput::

    testpmd>show port stats all

5. Stop port at vhost side and re-calculate the average throughput, verify the throughput is zero after port stop::

    testpmd>stop
    testpmd>port stop 0
    testpmd>show port stats all

6. Restart port at vhost side and re-calculate the average throughput, verify the throughput is not zero after port restart::

    testpmd>port start 0
    testpmd>set burst 1
    testpmd>start tx_first 1
    testpmd>show port stats all

Test Case 2: loopback test with packed ring non-mergeable path
==============================================================

1. Launch vhost by below command::

    rm -rf vhost-net*
    ./testpmd -n 4 -l 2-4  --socket-mem 1024,1024 --legacy-mem --no-pci \
    --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net,queues=1,client=0' -- -i --nb-cores=1 --txd=1024 --rxd=1024
    testpmd>set fwd mac

2. Launch virtio-user by below command::

    ./testpmd -n 4 -l 5-6 --socket-mem 1024,1024 \
    --legacy-mem --no-pci --file-prefix=virtio \
    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,packed_vq=1,mrg_rxbuf=0,in_order=0 \
    -- -i --tx-offloads=0x0 --enable-hw-vlan-strip --rss-ip --nb-cores=1 --txd=1024 --rxd=1024
    >set fwd mac
    >start

3. Send packets with vhost-testpmd, [frame_size] is the parameter changs in [64, 128, 256, 512, 1024, 1518]::

    testpmd>set txpkts [frame_size]
    testpmd>start tx_first 32

4. Get throughput 10 times and calculate the average throughput::

    testpmd>show port stats all

5. Stop port at vhost side and re-calculate the average throughput, verify the throughput is zero after port stop::

    testpmd>stop
    testpmd>port stop 0
    testpmd>show port stats all

6. Restart port at vhost side and re-calculate the average throughput, verify the throughput is not zero after port restart::

    testpmd>port start 0
    testpmd>set burst 1
    testpmd>start tx_first 1
    testpmd>show port stats all

Test Case 3: loopback test with packed ring inorder mergeable path
==================================================================

1. Launch vhost by below command::

    rm -rf vhost-net*
    ./testpmd -n 4 -l 2-4  --socket-mem 1024,1024 --legacy-mem --no-pci \
    --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net,queues=1,client=0' -- -i --nb-cores=1 --txd=1024 --rxd=1024
    testpmd>set fwd mac

2. Launch virtio-user by below command::

    ./testpmd -n 4 -l 5-6 --socket-mem 1024,1024 \
    --legacy-mem --no-pci --file-prefix=virtio \
    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,packed_vq=1,mrg_rxbuf=1,in_order=1 \
    -- -i --tx-offloads=0x0 --enable-hw-vlan-strip --rss-ip --nb-cores=1 --txd=1024 --rxd=1024
    >set fwd mac
    >start

3. Send packets with vhost-testpmd,[frame_size] is the parameter changs in [64, 128, 256, 512, 1024, 1518]::

    testpmd>set txpkts [frame_size]
    testpmd>start tx_first 32

4. Repeat below command to get throughput 10 times,then calculate the average throughput::

    testpmd>show port stats all

5. Stop port at vhost side and re-calculate the average throughput, verify the throughput is zero after port stop::

    testpmd>stop
    testpmd>port stop 0
    testpmd>show port stats all

6. Restart port at vhost side and re-calculate the average throughput, verify the throughput is not zero after port restart::

    testpmd>port start 0
    testpmd>set burst 1
    testpmd>start tx_first 1
    testpmd>show port stats all

Test Case 4: loopback test with packed ring inorder non-mergeable path
======================================================================

1. Launch vhost by below command::

    rm -rf vhost-net*
    ./testpmd -n 4 -l 2-4  --socket-mem 1024,1024 --legacy-mem --no-pci \
    --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net,queues=1,client=0' -- -i --nb-cores=1 --txd=1024 --rxd=1024
    testpmd>set fwd mac

2. Launch virtio-user by below command::

    ./testpmd -n 4 -l 5-6 --socket-mem 1024,1024 \
    --legacy-mem --no-pci --file-prefix=virtio \
    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,packed_vq=1,mrg_rxbuf=0,in_order=1 \
    -- -i --tx-offloads=0x0 --enable-hw-vlan-strip --rss-ip --nb-cores=1 --txd=1024 --rxd=1024
    >set fwd mac
    >start

3. Send packets with vhost-testpmd, [frame_size] is the parameter changs in [64, 128, 256, 512, 1024, 1518]::

    testpmd>set txpkts [frame_size]
    testpmd>start tx_first 32

4. Get throughput 10 times and calculate the average throughput::

    testpmd>show port stats all

5. Stop port at vhost side and re-calculate the average throughput, verify the throughput is zero after port stop::

    testpmd>stop
    testpmd>port stop 0
    testpmd>show port stats all

6. Restart port at vhost side and re-calculate the average throughput, verify the throughput is not zero after port restart::

    testpmd>port start 0
    testpmd>set burst 1
    testpmd>start tx_first 1
    testpmd>show port stats all

Test Case 5: loopback test with split ring inorder mergeable path
==================================================================

1. Launch vhost by below command::

    rm -rf vhost-net*
    ./testpmd -n 4 -l 2-4  --socket-mem 1024,1024 --legacy-mem --no-pci \
    --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net,queues=1,client=0' -- -i --nb-cores=1 --txd=1024 --rxd=1024
    testpmd>set fwd mac

2. Launch virtio-user by below command::

    ./testpmd -n 4 -l 5-6 --socket-mem 1024,1024 \
    --legacy-mem --no-pci --file-prefix=virtio \
    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,in_order=1,mrg_rxbuf=1 \
    -- -i --tx-offloads=0x0 --enable-hw-vlan-strip --rss-ip --nb-cores=1 --txd=1024 --rxd=1024
    >set fwd mac
    >start

3. Send packets with vhost-testpmd,[frame_size] is the parameter changs in [64, 128, 256, 512, 1024, 1518]::

    testpmd>set txpkts [frame_size]
    testpmd>start tx_first 32

4. Get throughput 10 times and calculate the average throughput::

    testpmd>show port stats all

5. Stop port at vhost side and re-calculate the average throughput, verify the throughput is zero after port stop::

    testpmd>stop
    testpmd>port stop 0
    testpmd>show port stats all

6. Restart port at vhost side and re-calculate the average throughput, verify the throughput is not zero after port restart::

    testpmd>port start 0
    testpmd>set burst 1
    testpmd>start tx_first 1
    testpmd>show port stats all

Test Case 6: loopback test with split ring inorder non-mergeable path
=====================================================================

1. Launch vhost by below command::

    rm -rf vhost-net*
    ./testpmd -n 4 -l 2-4  --socket-mem 1024,1024 --legacy-mem --no-pci \
    --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net,queues=1,client=0' -- -i --nb-cores=1 --txd=1024 --rxd=1024
    testpmd>set fwd mac

2. Launch virtio-user by below command::

    ./testpmd -n 4 -l 5-6 --socket-mem 1024,1024 \
    --legacy-mem --no-pci --file-prefix=virtio \
    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,in_order=1,mrg_rxbuf=0 \
    -- -i --tx-offloads=0x0 --enable-hw-vlan-strip --rss-ip --nb-cores=1 --txd=1024 --rxd=1024
    >set fwd mac
    >start

3. Send packets with vhost-testpmd, [frame_size] is the parameter changs in [64, 128, 256, 512, 1024, 1518]::

    testpmd>set txpkts [frame_size]
    testpmd>start tx_first 32

4. Get throughput 10 times and calculate the average throughput::

    testpmd>show port stats all

5. Stop port at vhost side and re-calculate the average throughput, verify the throughput is zero after port stop::

    testpmd>stop
    testpmd>port stop 0
    testpmd>show port stats all

6. Restart port at vhost side and re-calculate the average throughput, verify the throughput is not zero after port restart::

    testpmd>port start 0
    testpmd>set burst 1
    testpmd>start tx_first 1
    testpmd>show port stats all

Test Case 7: loopback test with split ring mergeable path
=========================================================

1. Launch vhost by below command::

    rm -rf vhost-net*
    ./testpmd -n 4 -l 2-4  --socket-mem 1024,1024 --legacy-mem --no-pci \
    --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net,queues=1,client=0' -- -i --nb-cores=1 --txd=1024 --rxd=1024
    testpmd>set fwd mac

2. Launch virtio-user by below command::

    ./testpmd -n 4 -l 5-6 --socket-mem 1024,1024 \
    --legacy-mem --no-pci --file-prefix=virtio \
    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,in_order=0,mrg_rxbuf=1 \
    -- -i --tx-offloads=0x0 --enable-hw-vlan-strip --rss-ip --nb-cores=1 --txd=1024 --rxd=1024
    >set fwd mac
    >start

3. Send packets with vhost-testpmd, [frame_size] is the parameter changs in [64, 128, 256, 512, 1024, 1518]::

    testpmd>set txpkts [frame_size]
    testpmd>start tx_first 32

4. Get throughput 10 times and calculate the average throughput::

    testpmd>show port stats all

5. Port restart at vhost side 100 times and re-calculate the average throughput, verify the throughput is not zero after port restart::

    testpmd>stop
    testpmd>port stop 0
    testpmd>port start 0
    ...
    testpmd>stop
    testpmd>port stop 0
    testpmd>port start 0
    testpmd>set burst 1
    testpmd>start tx_first 1
    testpmd>show port stats all

Test Case 8: loopback test with split ring non-mergeable path
=============================================================

1. Launch vhost by below command::

    rm -rf vhost-net*
    ./testpmd -n 4 -l 2-4  --socket-mem 1024,1024 --legacy-mem --no-pci \
    --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net,queues=1,client=0' -- -i --nb-cores=1 --txd=1024 --rxd=1024
    testpmd>set fwd mac

2. Launch virtio-user by below command::

    ./testpmd -n 4 -l 5-6 --socket-mem 1024,1024 \
    --legacy-mem --no-pci --file-prefix=virtio \
    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,in_order=0,mrg_rxbuf=0 \
    -- -i --tx-offloads=0x0 --enable-hw-vlan-strip --rss-ip --nb-cores=1 --txd=1024 --rxd=1024
    >set fwd mac
    >start

3. Send packets with vhost-testpmd,[frame_size] is the parameter changs in [64, 128, 256, 512, 1024, 1518]::

    testpmd>set txpkts [frame_size]
    testpmd>start tx_first 32

4. Get throughput 10 times and calculate the average throughput::

    testpmd>show port stats all

5. Stop port at vhost side and re-calculate the average throughput, verify the throughput is zero after port stop::

    testpmd>stop
    testpmd>port stop 0
    testpmd>show port stats all

6. Restart port at vhost side and re-calculate the average throughput, verify the throughput is not zero after port restart::

    testpmd>port start 0
    testpmd>set burst 1
    testpmd>start tx_first 1
    testpmd>show port stats all

Test Case 9: loopback test with split ring vector_rx path
=========================================================

1. Launch vhost by below command::

    rm -rf vhost-net*
    ./testpmd -n 4 -l 2-4  --socket-mem 1024,1024 --legacy-mem --no-pci \
    --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net,queues=1,client=0' -- -i --nb-cores=1 --txd=1024 --rxd=1024
    testpmd>set fwd mac

2. Launch virtio-user by below command::

    ./testpmd -n 4 -l 5-6 --socket-mem 1024,1024 \
    --legacy-mem --no-pci --file-prefix=virtio \
    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,in_order=0,mrg_rxbuf=0 \
    -- -i --nb-cores=1 --txd=1024 --rxd=1024
    >set fwd mac
    >start

3. Send packets with vhost-testpmd, [frame_size] is the parameter changs in [64, 128, 256, 512, 1024, 1518]::

    testpmd>set txpkts [frame_size]
    testpmd>start tx_first 32

4. Get throughput 10 times and calculate the average throughput::

    testpmd>show port stats all

5. Stop port at vhost side and re-calculate the average throughput, verify the throughput is zero after port stop::

    testpmd>stop
    testpmd>port stop 0
    testpmd>show port stats all

6. Restart port at vhost side and re-calculate the average throughput, verify the throughput is not zero after port restart::

    testpmd>port start 0
    testpmd>set burst 1
    testpmd>start tx_first 1
    testpmd>show port stats all