ixgbe: add LRO support

Support for in-kernel LRO with the ability to enable/disable via ethtool
based on comments from Ben Hutchings.

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: PJ Waskiewicz <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index d98113472a89..956914a5028d 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -32,6 +32,7 @@
 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/netdevice.h>
+#include <linux/inet_lro.h>
 
 #include "ixgbe_type.h"
 #include "ixgbe_common.h"
@@ -100,6 +101,9 @@
 #define IXGBE_TX_FLAGS_VLAN_MASK        0xffff0000
 #define IXGBE_TX_FLAGS_VLAN_SHIFT       16
 
+#define IXGBE_MAX_LRO_DESCRIPTORS       8
+#define IXGBE_MAX_LRO_AGGREGATE         32
+
 /* wrapper around a pointer to a socket buffer,
  * so a DMA handle can be stored along with the buffer */
 struct ixgbe_tx_buffer {
@@ -150,6 +154,8 @@ struct ixgbe_ring {
         /* cpu for tx queue */
         int cpu;
 #endif
+        struct net_lro_mgr lro_mgr;
+        bool lro_used;
         struct ixgbe_queue_stats stats;
         u8 v_idx; /* maps directly to the index for this ring in the hardware
                    * vector array, can also be used for finding the bit in EICR
@@ -287,6 +293,9 @@ struct ixgbe_adapter {
 
         unsigned long state;
         u64 tx_busy;
+        u64 lro_aggregated;
+        u64 lro_flushed;
+        u64 lro_no_desc;
 };
 
 enum ixbge_state_t {