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mctp: Add base packet definitions

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Simple packet header format as defined by DMTF DSP0236.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jeremy Kerr 2021-07-29 10:20:41 +08:00 committed by David S. Miller
parent 8f601a1e4f
commit 2c8e2e9aec
2 changed files with 36 additions and 0 deletions
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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/
MAN-PAGES: MANUAL PAGES FOR LINUX -- Sections 2, 3, 4, 5, and 7

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include/net/mctp.h Normal file
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@ -0,0 +1,35 @@
/* 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 */