be2net: Create multiple TXQs on RSS capable multi-channel BE3-R interfaces

Currently the driver creates only a single TXQ on any BE3-R multi-channel
interface.
This patch changes this and creates multiple TXQs on RSS-capable multi-channel
BE3-R interfaces. This change helps improve the TX pps performance on the
affected interface.

Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index eaf0891..fc44bb3 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -3209,9 +3209,13 @@ static void BEx_get_resources(struct be_adapter *adapter,
 
        res->max_mcast_mac = BE_MAX_MC;
 
-       /* For BE3 1Gb ports, F/W does not properly support multiple TXQs */
-       if (BE2_chip(adapter) || use_sriov || be_is_mc(adapter) ||
-           !be_physfn(adapter) || (adapter->port_num > 1))
+       /* 1) For BE3 1Gb ports, FW does not support multiple TXQs
+        * 2) Create multiple TX rings on a BE3-R multi-channel interface
+        *    *only* if it is RSS-capable.
+        */
+       if (BE2_chip(adapter) || use_sriov ||  (adapter->port_num > 1) ||
+           !be_physfn(adapter) || (be_is_mc(adapter) &&
+           !(adapter->function_caps & BE_FUNCTION_CAPS_RSS)))
                res->max_tx_qs = 1;
        else
                res->max_tx_qs = BE3_MAX_TX_QS;