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Commit c93570f2 authored by Eli Cohen's avatar Eli Cohen Committed by Roland Dreier
Browse files

IB/core: Add IPoIB UD LSO support 



LSO (large send offload) allows the networking stack to pass SKBs with
data size larger than the MTU to the IPoIB driver and have the HCA HW
fragment the data to multiple MSS-sized packets.  Add a device
capability flag IB_DEVICE_UD_TSO for devices that can perform TCP
segmentation offload, a new send work request opcode IB_WR_LSO,
header, hlen and mss fields for the work request structure, and a new
IB_WC_LSO completion type.

Signed-off-by: default avatarEli Cohen <eli@mellanox.co.il>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent b846f25a

include/rdma/ib_verbs.h

+7 −1
Original line number Diff line number Diff line
@@ -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_UD_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 {
@@ -660,6 +663,9 @@ 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 */