Commit 2c8e2e9a authored by Jeremy Kerr's avatar Jeremy Kerr Committed by David S. Miller
Browse files

mctp: Add base packet definitions 



Simple packet header format as defined by DMTF DSP0236.

Signed-off-by: default avatarJeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8f601a1e

MAINTAINERS

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@@ -11037,6 +11037,7 @@ M: Jeremy Kerr <jk@codeconstruct.com.au> 
M:	Matt Johnston <matt@codeconstruct.com.au>

L:	netdev@vger.kernel.org

S:	Maintained

F:	include/net/mctp.h

F:	net/mctp/









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include/net/mctp.h
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/* SPDX-License-Identifier: GPL-2.0 */









/*









 * Management Component Transport Protocol (MCTP)









 *









 * Copyright (c) 2021 Code Construct









 * Copyright (c) 2021 Google









 */



















#ifndef __NET_MCTP_H









#define __NET_MCTP_H



















#include <linux/bits.h>



















/* MCTP packet definitions */









struct mctp_hdr {









	u8	ver;









	u8	dest;









	u8	src;









	u8	flags_seq_tag;









};



















#define MCTP_VER_MIN	1









#define MCTP_VER_MAX	1



















/* Definitions for flags_seq_tag field */









#define MCTP_HDR_FLAG_SOM	BIT(7)









#define MCTP_HDR_FLAG_EOM	BIT(6)









#define MCTP_HDR_FLAG_TO	BIT(3)









#define MCTP_HDR_FLAGS		GENMASK(5, 3)









#define MCTP_HDR_SEQ_SHIFT	4









#define MCTP_HDR_SEQ_MASK	GENMASK(1, 0)









#define MCTP_HDR_TAG_SHIFT	0









#define MCTP_HDR_TAG_MASK	GENMASK(2, 0)



















#endif /* __NET_MCTP_H */