forked from mirrors/linux
dcc35baae7
Upcoming changes will add a USB host (and later gadget) driver for the MCTP-over-USB protocol. Add a header that provides common definitions for protocol support: the packet header format and a few framing definitions. Add a define for the MCTP class code, as per https://usb.org/defined-class-codes. Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://patch.msgid.link/20250221-dev-mctp-usb-v3-1-3353030fe9cc@codeconstruct.com.au Signed-off-by: Jakub Kicinski <kuba@kernel.org>
30 lines
764 B
C
30 lines
764 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* mctp-usb.h - MCTP USB transport binding: common definitions,
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* based on DMTF0283 specification:
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* https://www.dmtf.org/sites/default/files/standards/documents/DSP0283_1.0.1.pdf
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*
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* These are protocol-level definitions, that may be shared between host
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* and gadget drivers.
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*
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* Copyright (C) 2024-2025 Code Construct Pty Ltd
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*/
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#ifndef __LINUX_USB_MCTP_USB_H
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#define __LINUX_USB_MCTP_USB_H
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#include <linux/types.h>
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struct mctp_usb_hdr {
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__be16 id;
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u8 rsvd;
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u8 len;
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} __packed;
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#define MCTP_USB_XFER_SIZE 512
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#define MCTP_USB_BTU 68
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#define MCTP_USB_MTU_MIN MCTP_USB_BTU
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#define MCTP_USB_MTU_MAX (U8_MAX - sizeof(struct mctp_usb_hdr))
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#define MCTP_USB_DMTF_ID 0x1ab4
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#endif /* __LINUX_USB_MCTP_USB_H */
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