1/* SPDX-License-Identifier: GPL-2.0-only */
2/* Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
3 */
4
5#ifndef _RMNET_MAP_H_
6#define _RMNET_MAP_H_
7#include <linux/if_rmnet.h>
8
9struct rmnet_map_control_command {
10	u8  command_name;
11	u8  cmd_type:2;
12	u8  reserved:6;
13	u16 reserved2;
14	u32 transaction_id;
15	union {
16		struct {
17			u16 ip_family:2;
18			u16 reserved:14;
19			__be16 flow_control_seq_num;
20			__be32 qos_id;
21		} flow_control;
22		u8 data[0];
23	};
24}  __aligned(1);
25
26enum rmnet_map_commands {
27	RMNET_MAP_COMMAND_NONE,
28	RMNET_MAP_COMMAND_FLOW_DISABLE,
29	RMNET_MAP_COMMAND_FLOW_ENABLE,
30	/* These should always be the last 2 elements */
31	RMNET_MAP_COMMAND_UNKNOWN,
32	RMNET_MAP_COMMAND_ENUM_LENGTH
33};
34
35#define RMNET_MAP_GET_MUX_ID(Y) (((struct rmnet_map_header *) \
36				 (Y)->data)->mux_id)
37#define RMNET_MAP_GET_CD_BIT(Y) (((struct rmnet_map_header *) \
38				(Y)->data)->cd_bit)
39#define RMNET_MAP_GET_PAD(Y) (((struct rmnet_map_header *) \
40				(Y)->data)->pad_len)
41#define RMNET_MAP_GET_CMD_START(Y) ((struct rmnet_map_control_command *) \
42				    ((Y)->data + \
43				      sizeof(struct rmnet_map_header)))
44#define RMNET_MAP_GET_LENGTH(Y) (ntohs(((struct rmnet_map_header *) \
45					(Y)->data)->pkt_len))
46
47#define RMNET_MAP_COMMAND_REQUEST     0
48#define RMNET_MAP_COMMAND_ACK         1
49#define RMNET_MAP_COMMAND_UNSUPPORTED 2
50#define RMNET_MAP_COMMAND_INVALID     3
51
52#define RMNET_MAP_NO_PAD_BYTES        0
53#define RMNET_MAP_ADD_PAD_BYTES       1
54
55struct sk_buff *rmnet_map_deaggregate(struct sk_buff *skb,
56				      struct rmnet_port *port);
57struct rmnet_map_header *rmnet_map_add_map_header(struct sk_buff *skb,
58						  int hdrlen, int pad);
59void rmnet_map_command(struct sk_buff *skb, struct rmnet_port *port);
60int rmnet_map_checksum_downlink_packet(struct sk_buff *skb, u16 len);
61void rmnet_map_checksum_uplink_packet(struct sk_buff *skb,
62				      struct net_device *orig_dev);
63
64#endif /* _RMNET_MAP_H_ */
65