2026-05-26 18:42:23 +02:00
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/* SPDX-License-Identifier: BSD-3-Clause */
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/*
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* Copyright (C) 2021-2023 OpenSynergy GmbH
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* Copyright Red Hat, Inc. 2025
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*/
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#ifndef _LINUX_VIRTIO_VIRTIO_CAN_H
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#define _LINUX_VIRTIO_VIRTIO_CAN_H
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#include <linux/types.h>
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#include <linux/virtio_types.h>
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#include <linux/virtio_ids.h>
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#include <linux/virtio_config.h>
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/* Feature bit numbers */
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#define VIRTIO_CAN_F_CAN_CLASSIC 0
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#define VIRTIO_CAN_F_CAN_FD 1
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#define VIRTIO_CAN_F_RTR_FRAMES 2
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#define VIRTIO_CAN_F_LATE_TX_ACK 3
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/* CAN Result Types */
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#define VIRTIO_CAN_RESULT_OK 0
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#define VIRTIO_CAN_RESULT_NOT_OK 1
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/* CAN flags to determine type of CAN Id */
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#define VIRTIO_CAN_FLAGS_EXTENDED 0x8000
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#define VIRTIO_CAN_FLAGS_FD 0x4000
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#define VIRTIO_CAN_FLAGS_RTR 0x2000
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2026-06-04 15:57:15 -07:00
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#define VIRTIO_CAN_MAX_DLEN 64 /* this is like CANFD_MAX_DLEN */
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2026-05-26 18:42:23 +02:00
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struct virtio_can_config {
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#define VIRTIO_CAN_S_CTRL_BUSOFF (1u << 0) /* Controller BusOff */
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/* CAN controller status */
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__le16 status;
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};
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/* TX queue message types */
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struct virtio_can_tx_out {
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#define VIRTIO_CAN_TX 0x0001
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__le16 msg_type;
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__le16 length; /* 0..8 CC, 0..64 CAN-FD, 0..2048 CAN-XL, 12 bits */
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__u8 reserved_classic_dlc; /* If CAN classic length = 8 then DLC can be 8..15 */
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__u8 padding;
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__le16 reserved_xl_priority; /* May be needed for CAN XL priority */
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__le32 flags;
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__le32 can_id;
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__u8 sdu[] __counted_by_le(length);
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};
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struct virtio_can_tx_in {
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__u8 result;
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};
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/* RX queue message types */
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struct virtio_can_rx {
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#define VIRTIO_CAN_RX 0x0101
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__le16 msg_type;
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__le16 length; /* 0..8 CC, 0..64 CAN-FD, 0..2048 CAN-XL, 12 bits */
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__u8 reserved_classic_dlc; /* If CAN classic length = 8 then DLC can be 8..15 */
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__u8 padding;
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__le16 reserved_xl_priority; /* May be needed for CAN XL priority */
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__le32 flags;
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__le32 can_id;
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__u8 sdu[] __counted_by_le(length);
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};
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/* Control queue message types */
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struct virtio_can_control_out {
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#define VIRTIO_CAN_SET_CTRL_MODE_START 0x0201
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#define VIRTIO_CAN_SET_CTRL_MODE_STOP 0x0202
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__le16 msg_type;
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};
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struct virtio_can_control_in {
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__u8 result;
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};
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#endif /* #ifndef _LINUX_VIRTIO_VIRTIO_CAN_H */
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