From 2c8e2e9aec7927b387540a88351b8405ee82b34a Mon Sep 17 00:00:00 2001 From: Jeremy Kerr Date: Thu, 29 Jul 2021 10:20:41 +0800 Subject: [PATCH] mctp: Add base packet definitions Simple packet header format as defined by DMTF DSP0236. Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller --- MAINTAINERS | 1 + include/net/mctp.h | 35 +++++++++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+) create mode 100644 include/net/mctp.h diff --git a/MAINTAINERS b/MAINTAINERS index 22a1ff9..770b986 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11037,6 +11037,7 @@ M: Jeremy Kerr M: Matt Johnston 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 diff --git a/include/net/mctp.h b/include/net/mctp.h new file mode 100644 index 0000000..4c01e08 --- /dev/null +++ b/include/net/mctp.h @@ -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 + +/* 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 */ -- 2.7.4