LXR linux/drivers/net/ethernet/qualcomm/rmnet/rmnet

   1/* Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
   2 *
   3 * This program is free software; you can redistribute it and/or modify
   4 * it under the terms of the GNU General Public License version 2 and
   5 * only version 2 as published by the Free Software Foundation.
   6 *
   7 * This program is distributed in the hope that it will be useful,
   8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10 * GNU General Public License for more details.
  11 */
  12
  13#ifndef _RMNET_MAP_H_
  14#define _RMNET_MAP_H_
  15
  16struct rmnet_map_control_command {
  17        u8  command_name;
  18        u8  cmd_type:2;
  19        u8  reserved:6;
  20        u16 reserved2;
  21        u32 transaction_id;
  22        union {
  23                struct {
  24                        u16 ip_family:2;
  25                        u16 reserved:14;
  26                        __be16 flow_control_seq_num;
  27                        __be32 qos_id;
  28                } flow_control;
  29                u8 data[0];
  30        };
  31}  __aligned(1);
  32
  33enum rmnet_map_commands {
  34        RMNET_MAP_COMMAND_NONE,
  35        RMNET_MAP_COMMAND_FLOW_DISABLE,
  36        RMNET_MAP_COMMAND_FLOW_ENABLE,
  37        /* These should always be the last 2 elements */
  38        RMNET_MAP_COMMAND_UNKNOWN,
  39        RMNET_MAP_COMMAND_ENUM_LENGTH
  40};
  41
  42struct rmnet_map_header {
  43        u8  pad_len:6;
  44        u8  reserved_bit:1;
  45        u8  cd_bit:1;
  46        u8  mux_id;
  47        __be16 pkt_len;
  48}  __aligned(1);
  49
  50struct rmnet_map_dl_csum_trailer {
  51        u8  reserved1;
  52        u8  valid:1;
  53        u8  reserved2:7;
  54        u16 csum_start_offset;
  55        u16 csum_length;
  56        __be16 csum_value;
  57} __aligned(1);
  58
  59struct rmnet_map_ul_csum_header {
  60        __be16 csum_start_offset;
  61        u16 csum_insert_offset:14;
  62        u16 udp_ip4_ind:1;
  63        u16 csum_enabled:1;
  64} __aligned(1);
  65
  66#define RMNET_MAP_GET_MUX_ID(Y) (((struct rmnet_map_header *) \
  67                                 (Y)->data)->mux_id)
  68#define RMNET_MAP_GET_CD_BIT(Y) (((struct rmnet_map_header *) \
  69                                (Y)->data)->cd_bit)
  70#define RMNET_MAP_GET_PAD(Y) (((struct rmnet_map_header *) \
  71                                (Y)->data)->pad_len)
  72#define RMNET_MAP_GET_CMD_START(Y) ((struct rmnet_map_control_command *) \
  73                                    ((Y)->data + \
  74                                      sizeof(struct rmnet_map_header)))
  75#define RMNET_MAP_GET_LENGTH(Y) (ntohs(((struct rmnet_map_header *) \
  76                                        (Y)->data)->pkt_len))
  77
  78#define RMNET_MAP_COMMAND_REQUEST     0
  79#define RMNET_MAP_COMMAND_ACK         1
  80#define RMNET_MAP_COMMAND_UNSUPPORTED 2
  81#define RMNET_MAP_COMMAND_INVALID     3
  82
  83#define RMNET_MAP_NO_PAD_BYTES        0
  84#define RMNET_MAP_ADD_PAD_BYTES       1
  85
  86struct sk_buff *rmnet_map_deaggregate(struct sk_buff *skb,
  87                                      struct rmnet_port *port);
  88struct rmnet_map_header *rmnet_map_add_map_header(struct sk_buff *skb,
  89                                                  int hdrlen, int pad);
  90void rmnet_map_command(struct sk_buff *skb, struct rmnet_port *port);
  91int rmnet_map_checksum_downlink_packet(struct sk_buff *skb, u16 len);
  92void rmnet_map_checksum_uplink_packet(struct sk_buff *skb,
  93                                      struct net_device *orig_dev);
  94
  95#endif /* _RMNET_MAP_H_ */
  96