Provide pci whitelist for the DPDK_OPTIONS for ovs

To use DPDK, nics has to be bind with DPDK drivers. Once
binded, the nics will not be listed in the kernel commands.
We have to update the list of PCI address of the nics which
are bound to the DPDK drivers with openvswtich DPDK_OPTIONS
as whitelist. For which, the list of PCI address of the
nics which are bound to the given DPDK drivers are listed
via a custom facter. This whitelist is fed as input to the
DPDK_OPTIONS.

Co-Authored-By: Jaganathan Palanisamy <jpalanis@redhat.com>

Implements: blueprint tripleo-ovs-dpdk

Change-Id: I4fbca23e07468ee58dfce10a6deaf2f25da654c7

lib/facter/pci_address.rb

@@ -0,0 +1,28 @@
+require 'facter'
+drivers_details=Facter::Util::Resolution.exec("cat /proc/bus/pci/devices")
+drivers_lines=drivers_details.split("\n")
+drivers=Hash.new
+drivers_lines.each do |line|
+  line = line.gsub(/^\s+|\s+$/m, '').split(" ")
+  if line.length == 18
+    pci_embed = line[0]
+    driver = line[-1]
+    bus = pci_embed[0] + pci_embed[1]
+    dev = ((pci_embed[2].to_i(16) << 1) + (pci_embed[3].to_i(16) >> 3)).to_s(16).upcase
+    fun = (pci_embed[3].to_i(16) & 7).to_s(16).upcase
+    pci = "0000:" + bus + ":" + dev + "." + fun
+    if not drivers.has_key?(driver)
+      drivers[driver] = Array.new
+    end
+    drivers[driver] << pci
+  end
+end
+
+drivers.each do |driver,pci_addr|
+  Facter.add("pci_address_driver_#{driver}") do
+    confine :kernel => :linux
+    setcode do
+      pci_addr.join(',')
+    end
+  end
+end

manifests/dpdk.pp

@@ -3,10 +3,6 @@
 #
 # === Parameters
 #
-# [*package_ensure*]
-#   (Optional) State of the openvswitch package
-#   Defaults to 'present'.
-#
 # [*core_list*]
 #   (required) The list of cores to be used by the DPDK Poll Mode Driver
 #   The core_list is a string with format as <c1>[-c2][,c3[-c4],...] where c1, c2, etc are core indexes between 0 and 128
@@ -15,17 +11,26 @@
 # [*memory_channels*]
 #   (required) The number of memory channels to use as an integer
 #
+# [*package_ensure*]
+#   (Optional) State of the openvswitch package
+#   Defaults to 'present'.
+#
 # [*socket_mem*]
 #   (Optional) Set the memory to be allocated on each socket
 #   The socket_mem is a string with comma separated memory list in MB in the order of socket numbers.
 #   For example, to allocate memory of 1GB for socket 1 and no allocation for socket 0, the value should be "0,1024"
 #   Defaults to undef.
 #
+# [*driver_type*]
+#   (Optional) The DPDK Driver type
+#   Defaults to 'vfio-pci'
+#
 class vswitch::dpdk (
   $core_list,
   $memory_channels,
   $package_ensure     = 'present',
   $socket_mem         = undef,
+  $driver_type        = 'vfio-pci',
 ) {
 
   include ::vswitch::params
@@ -41,7 +46,14 @@ class vswitch::dpdk (
     $socket_string = "--socket-mem ${socket_mem}"
   }
 
-  $options = "DPDK_OPTIONS = \"-l ${core_list} -n ${memory_channels} ${socket_string}\""
+  if $driver_type {
+    $pci_list = inline_template('<%= Facter.value("pci_address_driver_#@driver_type") %>')
+    unless empty($pci_list) {
+      $white_list = inline_template('-w <%= @pci_list.gsub(",", " -w ") %>')
+    }
+  }
+
+  $options = "DPDK_OPTIONS = \"-l ${core_list} -n ${memory_channels} ${socket_string} ${white_list}\""
 
   case $::osfamily {
     'Redhat': {

releasenotes/notes/ovs-dpdk-97916bffadb9d594.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - DPDK puppet class is added to configure DPDK with ovs.

spec/classes/vswitch_dpdk_spec.rb

@@ -3,17 +3,9 @@ require 'spec_helper'
 describe 'vswitch::dpdk' do
 
   let :default_params do {
-    :package_ensure   => 'present',
-    :core_list        => '1,2',
-    :memory_channels  => '2'
-  }
-  end
-
-  let :socket_mem_params do {
     :package_ensure   => 'present',
     :core_list        => '1,2',
     :memory_channels  => '2',
-    :socket_mem       => '1024'
   }
   end
 
@@ -47,7 +39,6 @@ describe 'vswitch::dpdk' do
         :before   => 'Service[openvswitch]',
       )
     end
-
   end
 
   shared_examples_for 'vswitch dpdk mandatory params' do
@@ -61,17 +52,36 @@ describe 'vswitch::dpdk' do
     end
   end
 
-  shared_examples_for 'vswitch dpdk socket_mem param' do
-    it 'configures dpdk options for ovs' do
+  shared_examples_for 'vswitch dpdk additional params' do
+    context 'when passing socket mem' do
+      before :each do
+        params.merge!(:socket_mem => '1024')
+      end
+      it 'configures dpdk options with socket memory' do
         is_expected.to contain_file_line('/etc/sysconfig/openvswitch').with(
           :path   => '/etc/sysconfig/openvswitch',
           :match  => '^DPDK_OPTIONS.*',
-        :line   => 'DPDK_OPTIONS = "-l 1,2 -n 2 --socket-mem 1024"',
+          :line   => 'DPDK_OPTIONS = "-l 1,2 -n 2 --socket-mem 1024 "',
           :before => 'Service[openvswitch]',
         )
       end
     end
 
+    context 'when providing valid driver type facts' do
+      before :each do
+        params.merge!(:driver_type => 'test')
+      end
+      it 'configures dpdk options with pci address for driver test' do
+        is_expected.to contain_file_line('/etc/sysconfig/openvswitch').with(
+          :path   => '/etc/sysconfig/openvswitch',
+          :match  => '^DPDK_OPTIONS.*',
+          :line   => 'DPDK_OPTIONS = "-l 1,2 -n 2  -w 0000:00:05.0 -w 0000:00:05.1"',
+          :before => 'Service[openvswitch]',
+        )
+      end
+    end
+  end
+
   context 'on redhat with only mandatory parameters' do
     let :params do default_params end
 
@@ -89,19 +99,20 @@ describe 'vswitch::dpdk' do
   end
 
   context 'on redhat with additonal parameters' do
-    let :params do socket_mem_params end
+    let :params do default_params end
 
     let :facts do
       OSDefaults.get_facts({
         :osfamily    => 'Redhat',
         :ovs_version => '1.4.2',
+        :pci_address_driver_test => '0000:00:05.0,0000:00:05.1'
       })
     end
 
     let :platform_params do redhat_platform_params end
 
     it_configures 'vswitch dpdk'
-    it_configures 'vswitch dpdk socket_mem param'
+    it_configures 'vswitch dpdk additional params'
   end
 
 end