net/bluetooth/a2mp.h

   1 /*
   2    Copyright (c) 2010,2011 Code Aurora Forum.  All rights reserved.
   3    Copyright (c) 2011,2012 Intel Corp.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License version 2 and
   7    only version 2 as published by the Free Software Foundation.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13 */
  14
  15 #ifndef __A2MP_H
  16 #define __A2MP_H
  17
  18 #include <net/bluetooth/l2cap.h>
  19
  20 enum amp_mgr_state {
  21         READ_LOC_AMP_INFO,
  22         READ_LOC_AMP_ASSOC,
  23         READ_LOC_AMP_ASSOC_FINAL,
  24         WRITE_REMOTE_AMP_ASSOC,
  25 };
  26
  27 struct amp_mgr {
  28         struct list_head        list;
  29         struct l2cap_conn       *l2cap_conn;
  30         struct l2cap_chan       *a2mp_chan;
  31         struct l2cap_chan       *bredr_chan;
  32         struct kref             kref;
  33         __u8                    ident;
  34         __u8                    handle;
  35         unsigned long           state;
  36         unsigned long           flags;
  37
  38         struct list_head        amp_ctrls;
  39         struct mutex            amp_ctrls_lock;
  40 };
  41
  42 struct a2mp_cmd {
  43         __u8    code;
  44         __u8    ident;
  45         __le16  len;
  46         __u8    data[0];
  47 } __packed;
  48
  49 /* A2MP command codes */
  50 #define A2MP_COMMAND_REJ         0x01
  51 struct a2mp_cmd_rej {
  52         __le16  reason;
  53         __u8    data[0];
  54 } __packed;
  55
  56 #define A2MP_DISCOVER_REQ        0x02
  57 struct a2mp_discov_req {
  58         __le16  mtu;
  59         __le16  ext_feat;
  60 } __packed;
  61
  62 struct a2mp_cl {
  63         __u8    id;
  64         __u8    type;
  65         __u8    status;
  66 } __packed;
  67
  68 #define A2MP_DISCOVER_RSP        0x03
  69 struct a2mp_discov_rsp {
  70         __le16     mtu;
  71         __le16     ext_feat;
  72         struct a2mp_cl cl[0];
  73 } __packed;
  74
  75 #define A2MP_CHANGE_NOTIFY       0x04
  76 #define A2MP_CHANGE_RSP          0x05
  77
  78 #define A2MP_GETINFO_REQ         0x06
  79 struct a2mp_info_req {
  80         __u8       id;
  81 } __packed;
  82
  83 #define A2MP_GETINFO_RSP         0x07
  84 struct a2mp_info_rsp {
  85         __u8    id;
  86         __u8    status;
  87         __le32  total_bw;
  88         __le32  max_bw;
  89         __le32  min_latency;
  90         __le16  pal_cap;
  91         __le16  assoc_size;
  92 } __packed;
  93
  94 #define A2MP_GETAMPASSOC_REQ     0x08
  95 struct a2mp_amp_assoc_req {
  96         __u8    id;
  97 } __packed;
  98
  99 #define A2MP_GETAMPASSOC_RSP     0x09
 100 struct a2mp_amp_assoc_rsp {
 101         __u8    id;
 102         __u8    status;
 103         __u8    amp_assoc[0];
 104 } __packed;
 105
 106 #define A2MP_CREATEPHYSLINK_REQ  0x0A
 107 #define A2MP_DISCONNPHYSLINK_REQ 0x0C
 108 struct a2mp_physlink_req {
 109         __u8    local_id;
 110         __u8    remote_id;
 111         __u8    amp_assoc[0];
 112 } __packed;
 113
 114 #define A2MP_CREATEPHYSLINK_RSP  0x0B
 115 #define A2MP_DISCONNPHYSLINK_RSP 0x0D
 116 struct a2mp_physlink_rsp {
 117         __u8    local_id;
 118         __u8    remote_id;
 119         __u8    status;
 120 } __packed;
 121
 122 /* A2MP response status */
 123 #define A2MP_STATUS_SUCCESS                     0x00
 124 #define A2MP_STATUS_INVALID_CTRL_ID             0x01
 125 #define A2MP_STATUS_UNABLE_START_LINK_CREATION  0x02
 126 #define A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS     0x02
 127 #define A2MP_STATUS_COLLISION_OCCURED           0x03
 128 #define A2MP_STATUS_DISCONN_REQ_RECVD           0x04
 129 #define A2MP_STATUS_PHYS_LINK_EXISTS            0x05
 130 #define A2MP_STATUS_SECURITY_VIOLATION          0x06
 131
 132 struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr);
 133
 134 #if IS_ENABLED(CONFIG_BT_HS)
 135 int amp_mgr_put(struct amp_mgr *mgr);
 136 struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
 137                                        struct sk_buff *skb);
 138 void a2mp_discover_amp(struct l2cap_chan *chan);
 139 #else
 140 static inline int amp_mgr_put(struct amp_mgr *mgr)
 141 {
 142         return 0;
 143 }
 144
 145 static inline struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
 146                                                      struct sk_buff *skb)
 147 {
 148         return NULL;
 149 }
 150
 151 static inline void a2mp_discover_amp(struct l2cap_chan *chan)
 152 {
 153 }
 154 #endif
 155
 156 void a2mp_send_getinfo_rsp(struct hci_dev *hdev);
 157 void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status);
 158 void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status);
 159 void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status);
 160
 161 #endif /* __A2MP_H */