be2net: Add description about various RSS hash types

Incorporated review comment from Eric Dumazet. Added description
about different RSS hash types which adapter is capable of.
Will add support for ETHTOOL_GRXFH and ETHTOOL_SRXFX as suggested
by Ben Hutchings in a later patch.

Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@emulex.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.h b/drivers/net/ethernet/emulex/benet/be_cmds.h
index 45d70de..d5a4ded 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_cmds.h
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.h
@@ -1082,8 +1082,18 @@ struct be_cmd_resp_query_fw_cfg {
        u32 function_caps;
 };
 
-/******************** RSS Config *******************/
-/* RSS types */
+/******************** RSS Config ****************************************/
+/* RSS type            Input parameters used to compute RX hash
+ * RSS_ENABLE_IPV4     SRC IPv4, DST IPv4
+ * RSS_ENABLE_TCP_IPV4 SRC IPv4, DST IPv4, TCP SRC PORT, TCP DST PORT
+ * RSS_ENABLE_IPV6     SRC IPv6, DST IPv6
+ * RSS_ENABLE_TCP_IPV6 SRC IPv6, DST IPv6, TCP SRC PORT, TCP DST PORT
+ * RSS_ENABLE_UDP_IPV4 SRC IPv4, DST IPv4, UDP SRC PORT, UDP DST PORT
+ * RSS_ENABLE_UDP_IPV6 SRC IPv6, DST IPv6, UDP SRC PORT, UDP DST PORT
+ *
+ * When multiple RSS types are enabled, HW picks the best hash policy
+ * based on the type of the received packet.
+ */
 #define RSS_ENABLE_NONE                                0x0
 #define RSS_ENABLE_IPV4                                0x1
 #define RSS_ENABLE_TCP_IPV4                    0x2