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