T1797: Add initial vpp configuration

Add initial configuration mode for VPP (PoC)

set vpp cpu corelist-workers '2'
set vpp cpu main-core '1'
set vpp interface eth1 num-rx-desc '256'
set vpp interface eth1 num-rx-queues '512'
set vpp interface eth1 num-tx-desc '256'
set vpp interface eth1 num-tx-queues '512'
set vpp interface eth1 pci '0000:02:00.0'
set vpp interface eth1 rx-mode 'polling'
set vpp interface eth2 pci '0000:08:00.0'

Limitation:
  - 'set vpp interface ethX pci auto' works only per first
    commit, then interface detached from default stack and creates
    tun interface 'ethX' to communicate with default stack. In this
    case we can't get PCI address via ethtool for 'tun' interfaces.
    But we can set pci address manualy.

  - Interface sync between default stack and VPP-DPDK stack
    After vpp change it doesn't trigger iproute2 for changes
    (should be written later)

I.e. if we change something in vpp per each commit it restarts
vpp.service it gets empty interface config as we don't configure vpp
directly and it should be configured via iproute2
But then if we do any change on interface (for example description)
it gets IP address, MTU, state, etc.

2 files changed, 130 insertions, 0 deletions

diff --git a/data/templates/vpp/override.conf.j2 b/data/templates/vpp/override.conf.j2
new file mode 100644
index 000000000..a2c2b04ed
--- /dev/null
+++ b/data/templates/vpp/override.conf.j2
@@ -0,0 +1,14 @@
+[Unit]
+After=
+After=vyos-router.service
+ConditionPathExists=
+ConditionPathExists=/run/vpp/vpp.conf
+
+[Service]
+EnvironmentFile=
+ExecStart=
+ExecStart=/usr/bin/vpp -c /run/vpp/vpp.conf
+WorkingDirectory=
+WorkingDirectory=/run/vpp
+Restart=always
+RestartSec=10
diff --git a/data/templates/vpp/startup.conf.j2 b/data/templates/vpp/startup.conf.j2
new file mode 100644
index 000000000..f33539fba
--- /dev/null
+++ b/data/templates/vpp/startup.conf.j2
@@ -0,0 +1,116 @@
+# Generated by /usr/libexec/vyos/conf_mode/vpp.py
+
+unix {
+    nodaemon
+    log /var/log/vpp.log
+    full-coredump
+    cli-listen /run/vpp/cli.sock
+    gid vpp
+    # exec /etc/vpp/bootstrap.vpp
+{% if unix is vyos_defined %}
+{%     if unix.poll_sleep_usec is vyos_defined %}
+    poll-sleep-usec {{ unix.poll_sleep_usec }}
+{%     endif %}
+{% endif %}
+}
+
+{% if cpu is vyos_defined %}
+cpu {
+{%     if cpu.main_core is vyos_defined %}
+    main-core {{ cpu.main_core }}
+{%     endif %}
+{%     if cpu.corelist_workers is vyos_defined %}
+    corelist-workers {{ cpu.corelist_workers | join(',') }}
+{%     endif %}
+{%     if cpu.skip_cores is vyos_defined %}
+    skip-cores {{ cpu.skip_cores }}
+{%     endif %}
+{%     if cpu.workers is vyos_defined %}
+    workers {{ cpu.workers }}
+{%     endif %}
+}
+{% endif %}
+
+{# ip heap-size does not work now (23.06-rc2~1-g3a4e62ad4) #}
+{# vlib_call_all_config_functions: unknown input `ip  heap-size 32M ' #}
+{% if ip is vyos_defined %}
+#ip {
+#{%     if ip.heap_size is vyos_defined %}
+#    heap-size {{ ip.heap_size }}M
+#{%     endif %}
+#}
+{% endif %}
+
+{% if ip6 is vyos_defined %}
+ip6 {
+{%     if ip6.hash_buckets is vyos_defined %}
+    hash-buckets {{ ip6.hash_buckets }}
+{%     endif %}
+{%     if ip6.heap_size is vyos_defined %}
+    heap-size {{ ip6.heap_size }}M
+{%     endif %}
+}
+{% endif %}
+
+{% if l2learn is vyos_defined %}
+l2learn {
+{%     if l2learn.limit is vyos_defined %}
+    limit {{ l2learn.limit }}
+{%     endif %}
+}
+{% endif %}
+
+{% if logging is vyos_defined %}
+logging {
+{%     if logging.default_log_level is vyos_defined %}
+    default-log-level {{ logging.default_log_level }}
+{%     endif %}
+}
+{% endif %}
+
+{% if physmem is vyos_defined %}
+physmem {
+{%     if physmem.max_size is vyos_defined %}
+    max-size {{ physmem.max_size.upper() }}
+{%     endif %}
+}
+{% endif %}
+
+plugins {
+    path /usr/lib/x86_64-linux-gnu/vpp_plugins/
+    plugin default { disable }
+    plugin dpdk_plugin.so { enable }
+    plugin linux_cp_plugin.so { enable }
+    plugin linux_nl_plugin.so { enable }
+}
+
+linux-cp {
+    lcp-sync
+    lcp-auto-subint
+}
+
+dpdk {
+    # Whitelist the fake PCI address 0000:00:00.0
+    # This prevents all devices from being added to VPP-DPDK by default
+    dev 0000:00:00.0
+{% for iface, iface_config in interface.items() %}
+{%     if iface_config.pci is vyos_defined %}
+    dev {{ iface_config.pci }} {
+        name {{ iface }}
+{%         if iface_config.num_rx_desc is vyos_defined %}
+        num-rx-desc {{ iface_config.num_rx_desc }}
+{%         endif %}
+{%         if iface_config.num_tx_desc is vyos_defined %}
+        num-tx-desc {{ iface_config.num_tx_desc }}
+{%         endif %}
+{%         if iface_config.num_rx_queues is vyos_defined %}
+        num-rx-queues {{ iface_config.num_rx_queues }}
+{%         endif %}
+{%         if iface_config.num_tx_queues is vyos_defined %}
+        num-tx-queues {{ iface_config.num_tx_queues }}
+{%         endif %}
+        }
+{%     endif %}
+{% endfor %}
+    uio-bind-force
+}