netxen: add hardware LRO support

Add support to handle aggregate packets from firmware.
Local TCP flows are automatically identified by firmware
based on the dest IP hash added by driver for local IP
addresses.

The packets are sent down on the jumbo rx ring.

Signed-off-by: Narender Kumar <narender.kumar@qlogic.com>
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index bb4aa4f58676..ae81f7022d23 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -365,6 +365,7 @@ struct rcv_desc {
 #define NETXEN_NIC_RXPKT_DESC  0x04
 #define NETXEN_OLD_RXPKT_DESC  0x3f
 #define NETXEN_NIC_RESPONSE_DESC 0x05
+#define NETXEN_NIC_LRO_DESC     0x12
 
 /* for status field in status_desc */
 #define STATUS_NEED_CKSUM       (1)
@@ -398,6 +399,24 @@ struct rcv_desc {
 #define netxen_get_sts_opcode(sts_data) \
         (((sts_data) >> 58) & 0x03F)
 
+#define netxen_get_lro_sts_refhandle(sts_data)  \
+        ((sts_data) & 0x0FFFF)
+#define netxen_get_lro_sts_length(sts_data)     \
+        (((sts_data) >> 16) & 0x0FFFF)
+#define netxen_get_lro_sts_l2_hdr_offset(sts_data)      \
+        (((sts_data) >> 32) & 0x0FF)
+#define netxen_get_lro_sts_l4_hdr_offset(sts_data)      \
+        (((sts_data) >> 40) & 0x0FF)
+#define netxen_get_lro_sts_timestamp(sts_data)  \
+        (((sts_data) >> 48) & 0x1)
+#define netxen_get_lro_sts_type(sts_data)       \
+        (((sts_data) >> 49) & 0x7)
+#define netxen_get_lro_sts_push_flag(sts_data)          \
+        (((sts_data) >> 52) & 0x1)
+#define netxen_get_lro_sts_seq_number(sts_data)         \
+        ((sts_data) & 0x0FFFFFFFF)
+
+
 struct status_desc {
         __le64 status_desc_data[2];
 } __attribute__ ((aligned(16)));
@@ -712,6 +731,7 @@ struct netxen_recv_context {
 #define NX_CAP0_LSO                     NX_CAP_BIT(0, 6)
 #define NX_CAP0_JUMBO_CONTIGUOUS        NX_CAP_BIT(0, 7)
 #define NX_CAP0_LRO_CONTIGUOUS          NX_CAP_BIT(0, 8)
+#define NX_CAP0_HW_LRO                  NX_CAP_BIT(0, 10)
 
 /*
  * Context state
@@ -969,6 +989,7 @@ typedef struct {
 #define NX_FW_CAPABILITY_PEXQ                   (1 << 7)
 #define NX_FW_CAPABILITY_BDG                    (1 << 8)
 #define NX_FW_CAPABILITY_FVLANTX                (1 << 9)
+#define NX_FW_CAPABILITY_HW_LRO                 (1 << 10)
 
 /* module types */
 #define LINKEVENT_MODULE_NOT_PRESENT                    1