From: Eli Cohen <eli@mellanox.co.il>
Date: Wed, 30 Jan 2008 16:30:57 +0000 (+0200)
Subject: IB/core: Add IP checksum offload support
X-Git-Tag: v2.6.25-rc1~32^2~1
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e0605d9199b462454f2f2e5ca01810255a6d5cfa;p=linux-2.6

IB/core: Add IP checksum offload support

Add a device capability to show when it can handle checksum offload.
Also add a send flag for inserting checksums and a csum_ok field to
the completion record.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index cfbd38fe29..a5a7f9678a 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -95,7 +95,15 @@ enum ib_device_cap_flags {
 	IB_DEVICE_N_NOTIFY_CQ		= (1<<14),
 	IB_DEVICE_ZERO_STAG		= (1<<15),
 	IB_DEVICE_SEND_W_INV		= (1<<16),
-	IB_DEVICE_MEM_WINDOW		= (1<<17)
+	IB_DEVICE_MEM_WINDOW		= (1<<17),
+	/*
+	 * Devices should set IB_DEVICE_UD_IP_SUM if they support
+	 * insertion of UDP and TCP checksum on outgoing UD IPoIB
+	 * messages and can verify the validity of checksum for
+	 * incoming messages.  Setting this flag implies that the
+	 * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
+	 */
+	IB_DEVICE_UD_IP_CSUM		= (1<<18),
 };
 
 enum ib_atomic_cap {
@@ -431,6 +439,7 @@ struct ib_wc {
 	u8			sl;
 	u8			dlid_path_bits;
 	u8			port_num;	/* valid only for DR SMPs on switches */
+	int			csum_ok;
 };
 
 enum ib_cq_notify_flags {
@@ -615,7 +624,8 @@ enum ib_send_flags {
 	IB_SEND_FENCE		= 1,
 	IB_SEND_SIGNALED	= (1<<1),
 	IB_SEND_SOLICITED	= (1<<2),
-	IB_SEND_INLINE		= (1<<3)
+	IB_SEND_INLINE		= (1<<3),
+	IB_SEND_IP_CSUM		= (1<<4)
 };
 
 struct ib_sge {