| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * mctp-usb.h - MCTP USB transport binding: common definitions, |
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| 4 | * based on DMTF0283 specification: |
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| 5 | * https://www.dmtf.org/sites/default/files/standards/documents/DSP0283_1.0.1.pdf |
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| 6 | * |
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| 7 | * These are protocol-level definitions, that may be shared between host |
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| 8 | * and gadget drivers. |
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| 9 | * |
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| 10 | * Copyright (C) 2024-2025 Code Construct Pty Ltd |
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| 11 | */ |
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| 12 | |
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| 13 | #ifndef __LINUX_USB_MCTP_USB_H |
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| 14 | #define __LINUX_USB_MCTP_USB_H |
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| 15 | |
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| 16 | #include <linux/types.h> |
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| 17 | |
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| 18 | struct mctp_usb_hdr { |
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| 19 | __be16 id; |
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| 20 | u8 rsvd; |
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| 21 | u8 len; |
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| 22 | } __packed; |
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| 23 | |
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| 24 | #define MCTP_USB_XFER_SIZE 512 |
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| 25 | #define MCTP_USB_BTU 68 |
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| 26 | #define MCTP_USB_MTU_MIN MCTP_USB_BTU |
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| 27 | #define MCTP_USB_MTU_MAX (U8_MAX - sizeof(struct mctp_usb_hdr)) |
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| 28 | #define MCTP_USB_DMTF_ID 0x1ab4 |
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| 29 | |
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| 30 | #endif /* __LINUX_USB_MCTP_USB_H */ |
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| 31 | |
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