o Ethtool hook to configure number of RX rings.
o Implementation is scalable to support configuring TX rings.
o There exist ETHTOOL_GRXRINGS command for getting number of RX rings,
  but it is tigtly coupled with RX flow hash configuration.
o Patches for qlcnic and netxen_nic driver supporting this features
  will follow soon.

Signed-off-by: Amit Kumar Salecha <redacted>
---
 include/linux/ethtool.h |   20 ++++++++++++++++++++
 net/core/ethtool.c      |   33 +++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+), 0 deletions(-)

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index aac3e2e..de0decd 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h

@@ -226,6 +226,21 @@ struct ethtool_ringparam {
      __u32   tx_pending;
 };

+/* for configuring number of RX ring */
+struct ethtool_ring {
+     __u32   cmd;    /* ETHTOOL_{G,S}RING */
+
+     /* Read only attributes.  These indicate the maximum number
+      * of RX rings the driver will allow the user to set.
+      */
+     __u32   rx_max;
+
+     /* Values changeable by the user.  The valid values are
+      * in the range 1 to the "*_max" counterpart above.
+      */
+     __u32   rx_pending;
+};
+