[ofa-general] [PATCH 3/10] IB/core: Add LSO support

[Eli Cohen]

>From 5955550017933a1a3e169a4c2d700d6b3dc5c008 Mon Sep 17 00:00:00 2001
From: Eli Cohen <eli at mellanox.co.il>
Date: Thu, 28 Feb 2008 14:02:36 +0200
Subject: [PATCH] IB/core: Add LSO support

LSO allows the networikng stack to pass pass to the network driver SKBs
with data size larger then MTU and let the HW fragment the data to mss
sized packets.

Signed-off-by: Eli Cohen <eli at mellanox.co.il>
---
 include/rdma/ib_verbs.h |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 7ee0077..9557d10 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -104,6 +104,7 @@ enum ib_device_cap_flags {
 	 * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
 	 */
 	IB_DEVICE_UD_IP_CSUM		= (1<<18),
+	IB_DEVICE_TCP_TSO               = (1<<19),
 };
 
 enum ib_atomic_cap {
@@ -411,6 +412,7 @@ enum ib_wc_opcode {
 	IB_WC_COMP_SWAP,
 	IB_WC_FETCH_ADD,
 	IB_WC_BIND_MW,
+	IB_WC_LSO,
 /*
  * Set value of IB_WC_RECV so consumers can test if a completion is a
  * receive by testing (opcode & IB_WC_RECV).
@@ -622,7 +624,8 @@ enum ib_wr_opcode {
 	IB_WR_SEND_WITH_IMM,
 	IB_WR_RDMA_READ,
 	IB_WR_ATOMIC_CMP_AND_SWP,
-	IB_WR_ATOMIC_FETCH_AND_ADD
+	IB_WR_ATOMIC_FETCH_AND_ADD,
+	IB_WR_LSO
 };
 
 enum ib_send_flags {
@@ -630,7 +633,8 @@ enum ib_send_flags {
 	IB_SEND_SIGNALED	= (1<<1),
 	IB_SEND_SOLICITED	= (1<<2),
 	IB_SEND_INLINE		= (1<<3),
-	IB_SEND_IP_CSUM		= (1<<4)
+	IB_SEND_IP_CSUM		= (1<<4),
+	IB_SEND_UDP_LSO         = (1<<5)
 };
 
 struct ib_sge {
@@ -660,6 +664,9 @@ struct ib_send_wr {
 		} atomic;
 		struct {
 			struct ib_ah *ah;
+			void   *header;
+			int     hlen;
+			int     mss;
 			u32	remote_qpn;
 			u32	remote_qkey;
 			u16	pkey_index; /* valid for GSI only */
-- 
1.5.4.4