drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h

   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
   9 struct 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
  26 enum 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
  55 struct sk_buff *rmnet_map_deaggregate(struct sk_buff *skb,
  56                                       struct rmnet_port *port);
  57 struct rmnet_map_header *rmnet_map_add_map_header(struct sk_buff *skb,
  58                                                   int hdrlen, int pad);
  59 void rmnet_map_command(struct sk_buff *skb, struct rmnet_port *port);
  60 int rmnet_map_checksum_downlink_packet(struct sk_buff *skb, u16 len);
  61 void rmnet_map_checksum_uplink_packet(struct sk_buff *skb,
  62                                       struct net_device *orig_dev);
  63
  64 #endif /* _RMNET_MAP_H_ */