[PATCH v3 35/47] igb: Use UDP for RSS hash

[Akihiko Odaki]

e1000e does not support using UDP for RSS hash, but igb does.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
---
 hw/net/igb_regs.h |  3 +++
 hw/net/igb_core.c | 16 ++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/hw/net/igb_regs.h b/hw/net/igb_regs.h
index eb995d8b2e..e6ac26dc0e 100644
--- a/hw/net/igb_regs.h
+++ b/hw/net/igb_regs.h
@@ -659,6 +659,9 @@ union e1000_adv_rx_desc {
 
 #define E1000_RSS_QUEUE(reta, hash) (E1000_RETA_VAL(reta, hash) & 0x0F)
 
+#define E1000_MRQ_RSS_TYPE_IPV4UDP 7
+#define E1000_MRQ_RSS_TYPE_IPV6UDP 8
+
 #define E1000_STATUS_IOV_MODE 0x00040000
 
 #define E1000_STATUS_NUM_VFS_SHIFT 14
diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c
index 46babe85a9..a3267c0b7a 100644
--- a/hw/net/igb_core.c
+++ b/hw/net/igb_core.c
@@ -287,6 +287,11 @@ igb_rss_get_hash_type(IGBCore *core, struct NetRxPkt *pkt)
             return E1000_MRQ_RSS_TYPE_IPV4TCP;
         }
 
+        if (l4hdr_proto == ETH_L4_HDR_PROTO_UDP &&
+            (core->mac[MRQC] & E1000_MRQC_RSS_FIELD_IPV4_UDP)) {
+            return E1000_MRQ_RSS_TYPE_IPV4UDP;
+        }
+
         if (E1000_MRQC_EN_IPV4(core->mac[MRQC])) {
             return E1000_MRQ_RSS_TYPE_IPV4;
         }
@@ -322,6 +327,11 @@ igb_rss_get_hash_type(IGBCore *core, struct NetRxPkt *pkt)
                 return E1000_MRQ_RSS_TYPE_IPV6TCPEX;
             }
 
+            if (l4hdr_proto == ETH_L4_HDR_PROTO_UDP &&
+                (core->mac[MRQC] & E1000_MRQC_RSS_FIELD_IPV6_UDP)) {
+                return E1000_MRQ_RSS_TYPE_IPV6UDP;
+            }
+
             if (E1000_MRQC_EN_IPV6EX(core->mac[MRQC])) {
                 return E1000_MRQ_RSS_TYPE_IPV6EX;
             }
@@ -360,6 +370,12 @@ igb_rss_calc_hash(IGBCore *core, struct NetRxPkt *pkt, 
E1000E_RSSInfo *info)
     case E1000_MRQ_RSS_TYPE_IPV6EX:
         type = NetPktRssIpV6Ex;
         break;
+    case E1000_MRQ_RSS_TYPE_IPV4UDP:
+        type = NetPktRssIpV4Udp;
+        break;
+    case E1000_MRQ_RSS_TYPE_IPV6UDP:
+        type = NetPktRssIpV6Udp;
+        break;
     default:
         assert(false);
         return 0;
-- 
2.40.0