diff options
Diffstat (limited to 'include/uapi/linux/virtio_can.h')
| -rw-r--r-- | include/uapi/linux/virtio_can.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/uapi/linux/virtio_can.h b/include/uapi/linux/virtio_can.h new file mode 100644 index 000000000000..e054d5099241 --- /dev/null +++ b/include/uapi/linux/virtio_can.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: BSD-3-Clause */ +/* + * Copyright (C) 2021-2023 OpenSynergy GmbH + * Copyright Red Hat, Inc. 2025 + */ +#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_RTR_FRAMES 2 +#define VIRTIO_CAN_F_LATE_TX_ACK 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 + +#define VIRTIO_CAN_MAX_DLEN 64 /* this is like CANFD_MAX_DLEN */ + +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[] __counted_by_le(length); +}; + +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[] __counted_by_le(length); +}; + +/* 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 */ |