flow: add RSS support

This patch enables the RSS configuration through vnet/flow interface
With this RSS feature, users can config the RSS functions for specific flows

Currently, it supports:
  default, toeplitz and symmetric_toeplitz rss function, and
  ipv4-tcp/ipv4-udp/ipv6-tcp/ipv6-ucp flow types

Users can use the following options to combine with above flow
types for more specific hash input set selection:
  l3-src-only, l3-dst-only, l4-src-only, l4-dst-only

Command line:
test flow add dst-ip any proto udp rss function default rss types ipv4-tcp use l3-dst-only
test flow add dst-ip any proto udp rss function toeplitz rss types ipv4-udp use l4-src-only
test flow add dst-ip any proto udp rss function symmetric_toeplitz rss types ipv6-udp use l3-src-only and l3-dst-only

Type: feature

Signed-off-by: Chenmin Sun <chenmin.sun@intel.com>
Change-Id: I213efc76dc8af37f2f63605884f353e05b0f5d2a

1 files changed, 49 insertions, 7 deletions

diff --git a/src/plugins/dpdk/device/flow.c b/src/plugins/dpdk/device/flow.c
index 279468f10f8..444a76e307e 100644
--- a/src/plugins/dpdk/device/flow.c
+++ b/src/plugins/dpdk/device/flow.c
@@ -61,6 +61,24 @@ mac_address_is_all_zero (const u8 addr[6])
   return true;
 }
 
+static inline void
+dpdk_flow_convert_rss_types (u64 type, u64 * dpdk_rss_type)
+{
+#define BIT_IS_SET(v, b) \
+  ((v) & (u64)1<<(b))
+
+  *dpdk_rss_type = 0;
+
+#undef _
+#define _(n, f, s) \
+      if (n != -1 && BIT_IS_SET(type, n)) \
+        *dpdk_rss_type |= f;
+
+  foreach_dpdk_rss_hf
+#undef _
+    return;
+}
+
 static int
 dpdk_flow_add (dpdk_device_t * xd, vnet_flow_t * f, dpdk_flow_entry_t * fe)
 {
@@ -74,6 +92,7 @@ dpdk_flow_add (dpdk_device_t * xd, vnet_flow_t * f, dpdk_flow_entry_t * fe)
   struct rte_flow_item_gtp gtp[2] = { };
   struct rte_flow_action_mark mark = { 0 };
   struct rte_flow_action_queue queue = { 0 };
+  struct rte_flow_action_rss rss = { 0 };
   struct rte_flow_item *item, *items = 0;
   struct rte_flow_action *action, *actions = 0;
   bool fate = false;
@@ -265,13 +284,15 @@ dpdk_flow_add (dpdk_device_t * xd, vnet_flow_t * f, dpdk_flow_entry_t * fe)
 	  item->spec = NULL;
 	  item->mask = NULL;
 	}
-
-      tcp[0].hdr.src_port = clib_host_to_net_u16 (src_port);
-      tcp[1].hdr.src_port = clib_host_to_net_u16 (src_port_mask);
-      tcp[0].hdr.dst_port = clib_host_to_net_u16 (dst_port);
-      tcp[1].hdr.dst_port = clib_host_to_net_u16 (dst_port_mask);
-      item->spec = tcp;
-      item->mask = tcp + 1;
+      else
+	{
+	  tcp[0].hdr.src_port = clib_host_to_net_u16 (src_port);
+	  tcp[1].hdr.src_port = clib_host_to_net_u16 (src_port_mask);
+	  tcp[0].hdr.dst_port = clib_host_to_net_u16 (dst_port);
+	  tcp[1].hdr.dst_port = clib_host_to_net_u16 (dst_port_mask);
+	  item->spec = tcp;
+	  item->mask = tcp + 1;
+	}
     }
   else
     {
@@ -512,6 +533,27 @@ pattern_end:
       else
 	fate = true;
     }
+  if (f->actions & VNET_FLOW_ACTION_RSS)
+    {
+      u64 rss_type = 0;
+      vec_add2 (actions, action, 1);
+      action->type = RTE_FLOW_ACTION_TYPE_RSS;
+      action->conf = &rss;
+
+      /* convert types to DPDK rss bitmask */
+      dpdk_flow_convert_rss_types (f->rss_types, &rss_type);
+
+      rss.types = rss_type;
+      rss.func = f->rss_fun;
+
+      if (fate == true)
+	{
+	  rv = VNET_FLOW_ERROR_INTERNAL;
+	  goto done;
+	}
+      else
+	fate = true;
+    }
   if (fate == false)
     {
       vec_add2 (actions, action, 1);