interface: support configuring RSS steering queues

This patch adds the RSS steering queues set interface, and it's
implementation in DPDK device:

/* Interface to set rss queues of the interface */
typedef clib_error_t *(vnet_interface_rss_queues_set_t)
  (struct vnet_main_t * vnm, struct vnet_hw_interface_t * hi,
   clib_bitmap_t *bitmap);

This patch also introduces a command line to set the RSS queues:
  set interface rss queues <interface> <list <queue-list>>
To display the rss queues, use "show hardware-interfaces"

Below is the example to configure rss queues for interface Gig0:
vpp# set interface rss queues Gig0 list 0,2,4-7
vpp# show hardware-interfaces brief
              Name                Idx   Link  Hardware
VirtualFunctionEthernet18/1/0      1    down  VirtualFunctionEthernet18/1/0
  Link speed: unknown
  RSS queues: 0 2 4 5 6 7
local0                             0    down  local0
  Link speed: unknown
vpp#

Users can also configure the rss queues on a dpdk interface in
startup.conf:
dpdk {
    dev 0000:18:01.0 {
        rss-queues 0,2,5-7
    }
}

Type: feature

Signed-off-by: Chenmin Sun <chenmin.sun@intel.com>
Change-Id: I1835595a1c54016a84eabee9fd62ce137935385d

1 files changed, 12 insertions, 0 deletions

diff --git a/src/vnet/interface.h b/src/vnet/interface.h
index 07da2617d71..895ce2e9279 100644
--- a/src/vnet/interface.h
+++ b/src/vnet/interface.h
@@ -88,6 +88,11 @@ typedef clib_error_t *(vnet_interface_set_l2_mode_function_t)
   (struct vnet_main_t * vnm, struct vnet_hw_interface_t * hi,
    i32 l2_if_adjust);
 
+/* Interface to set rss queues of the interface */
+typedef clib_error_t *(vnet_interface_rss_queues_set_t)
+  (struct vnet_main_t * vnm, struct vnet_hw_interface_t * hi,
+   clib_bitmap_t * bitmap);
+
 typedef enum
 {
   VNET_FLOW_DEV_OP_ADD_FLOW,
@@ -273,6 +278,10 @@ typedef struct _vnet_device_class
 
   /* Function to add/delete additional MAC addresses */
   vnet_interface_add_del_mac_address_function_t *mac_addr_add_del_function;
+
+  /* Interface to set rss queues of the interface */
+  vnet_interface_rss_queues_set_t *set_rss_queues_function;
+
 } vnet_device_class_t;
 
 #ifndef CLIB_MARCH_VARIANT
@@ -601,6 +610,9 @@ typedef struct vnet_hw_interface_t
   /* numa node that hardware device connects to */
   u8 numa_node;
 
+  /* rss queues bitmap */
+  clib_bitmap_t *rss_queues;
+
   /* trace */
   i32 n_trace;