be2net: add rxhash support

Add rxhash support,
Based on initial work by Eric Dumazet.

Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 30 insertions, 5 deletions

diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h
index ea1ea824d7c7..ab5be0545e38 100644
--- a/drivers/net/benet/be.h
+++ b/drivers/net/benet/be.h
@@ -485,6 +485,11 @@ static inline void be_vf_eth_addr_generate(struct be_adapter *adapter, u8 *mac)
         memcpy(mac, adapter->netdev->dev_addr, 3);
 }
 
+static inline bool be_multi_rxq(const struct be_adapter *adapter)
+{
+        return adapter->num_rx_qs > 1;
+}
+
 extern void be_cq_notify(struct be_adapter *adapter, u16 qid, bool arm,
                 u16 num_popped);
 extern void be_link_status_update(struct be_adapter *adapter, bool link_up);
diff --git a/drivers/net/benet/be_ethtool.c b/drivers/net/benet/be_ethtool.c
index a665697df824..1565c81ff96c 100644
--- a/drivers/net/benet/be_ethtool.c
+++ b/drivers/net/benet/be_ethtool.c
@@ -735,6 +735,18 @@ be_read_eeprom(struct net_device *netdev, struct ethtool_eeprom *eeprom,
         return status;
 }
 
+static int be_set_flags(struct net_device *netdev, u32 data)
+{
+        struct be_adapter *adapter = netdev_priv(netdev);
+        int rc = -1;
+
+        if (be_multi_rxq(adapter))
+                rc = ethtool_op_set_flags(netdev, data, ETH_FLAG_RXHASH |
+                                ETH_FLAG_TXVLAN | ETH_FLAG_RXVLAN);
+
+        return rc;
+}
+
 const struct ethtool_ops be_ethtool_ops = {
         .get_settings = be_get_settings,
         .get_drvinfo = be_get_drvinfo,
@@ -764,4 +776,5 @@ const struct ethtool_ops be_ethtool_ops = {
         .get_regs = be_get_regs,
         .flash_device = be_do_flash,
         .self_test = be_self_test,
+        .set_flags = be_set_flags,
 };
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index 2c3685389485..d762c2a3dd9b 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -116,11 +116,6 @@ static char *ue_status_hi_desc[] = {
         "Unknown"
 };
 
-static inline bool be_multi_rxq(struct be_adapter *adapter)
-{
-        return (adapter->num_rx_qs > 1);
-}
-
 static void be_queue_free(struct be_adapter *adapter, struct be_queue_info *q)
 {
         struct be_dma_mem *mem = &q->dma_mem;
@@ -1012,6 +1007,9 @@ static void be_rx_compl_process(struct be_adapter *adapter,
 
         skb->truesize = skb->len + sizeof(struct sk_buff);
         skb->protocol = eth_type_trans(skb, adapter->netdev);
+        if (adapter->netdev->features & NETIF_F_RXHASH)
+                skb->rxhash = rxcp->rss_hash;
+
 
         if (unlikely(rxcp->vlanf)) {
                 if (!adapter->vlan_grp || adapter->vlans_added == 0) {
@@ -1072,6 +1070,8 @@ static void be_rx_compl_process_gro(struct be_adapter *adapter,
         skb->data_len = rxcp->pkt_size;
         skb->truesize += rxcp->pkt_size;
         skb->ip_summed = CHECKSUM_UNNECESSARY;
+        if (adapter->netdev->features & NETIF_F_RXHASH)
+                skb->rxhash = rxcp->rss_hash;
 
         if (likely(!rxcp->vlanf))
                 napi_gro_frags(&eq_obj->napi);
@@ -1101,6 +1101,8 @@ static void be_parse_rx_compl_v1(struct be_adapter *adapter,
                 AMAP_GET_BITS(struct amap_eth_rx_compl_v1, numfrags, compl);
         rxcp->pkt_type =
                 AMAP_GET_BITS(struct amap_eth_rx_compl_v1, cast_enc, compl);
+        rxcp->rss_hash =
+                AMAP_GET_BITS(struct amap_eth_rx_compl_v1, rsshash, rxcp);
         if (rxcp->vlanf) {
                 rxcp->vtm = AMAP_GET_BITS(struct amap_eth_rx_compl_v1, vtm,
                                 compl);
@@ -1131,6 +1133,8 @@ static void be_parse_rx_compl_v0(struct be_adapter *adapter,
                 AMAP_GET_BITS(struct amap_eth_rx_compl_v0, numfrags, compl);
         rxcp->pkt_type =
                 AMAP_GET_BITS(struct amap_eth_rx_compl_v0, cast_enc, compl);
+        rxcp->rss_hash =
+                AMAP_GET_BITS(struct amap_eth_rx_compl_v0, rsshash, rxcp);
         if (rxcp->vlanf) {
                 rxcp->vtm = AMAP_GET_BITS(struct amap_eth_rx_compl_v0, vtm,
                                 compl);
@@ -2615,6 +2619,9 @@ static void be_netdev_init(struct net_device *netdev)
                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
                 NETIF_F_GRO | NETIF_F_TSO6;
 
+        if (be_multi_rxq(adapter))
+                netdev->features |= NETIF_F_RXHASH;
+
         netdev->vlan_features |= NETIF_F_SG | NETIF_F_TSO |
                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;