net/bluetooth/a2mp.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3    Copyright (c) 2010,2011 Code Aurora Forum.  All rights reserved.
   4    Copyright (c) 2011,2012 Intel Corp.
   5
   6 */
   7
   8 #ifndef __A2MP_H
   9 #define __A2MP_H
  10
  11 #include <net/bluetooth/l2cap.h>
  12
  13 enum amp_mgr_state {
  14         READ_LOC_AMP_INFO,
  15         READ_LOC_AMP_ASSOC,
  16         READ_LOC_AMP_ASSOC_FINAL,
  17         WRITE_REMOTE_AMP_ASSOC,
  18 };
  19
  20 struct amp_mgr {
  21         struct list_head        list;
  22         struct l2cap_conn       *l2cap_conn;
  23         struct l2cap_chan       *a2mp_chan;
  24         struct l2cap_chan       *bredr_chan;
  25         struct kref             kref;
  26         __u8                    ident;
  27         __u8                    handle;
  28         unsigned long           state;
  29         unsigned long           flags;
  30
  31         struct list_head        amp_ctrls;
  32         struct mutex            amp_ctrls_lock;
  33 };
  34
  35 struct a2mp_cmd {
  36         __u8    code;
  37         __u8    ident;
  38         __le16  len;
  39         __u8    data[];
  40 } __packed;
  41
  42 /* A2MP command codes */
  43 #define A2MP_COMMAND_REJ         0x01
  44 struct a2mp_cmd_rej {
  45         __le16  reason;
  46         __u8    data[];
  47 } __packed;
  48
  49 #define A2MP_DISCOVER_REQ        0x02
  50 struct a2mp_discov_req {
  51         __le16  mtu;
  52         __le16  ext_feat;
  53 } __packed;
  54
  55 struct a2mp_cl {
  56         __u8    id;
  57         __u8    type;
  58         __u8    status;
  59 } __packed;
  60
  61 #define A2MP_DISCOVER_RSP        0x03
  62 struct a2mp_discov_rsp {
  63         __le16     mtu;
  64         __le16     ext_feat;
  65         struct a2mp_cl cl[];
  66 } __packed;
  67
  68 #define A2MP_CHANGE_NOTIFY       0x04
  69 #define A2MP_CHANGE_RSP          0x05
  70
  71 #define A2MP_GETINFO_REQ         0x06
  72 struct a2mp_info_req {
  73         __u8       id;
  74 } __packed;
  75
  76 #define A2MP_GETINFO_RSP         0x07
  77 struct a2mp_info_rsp {
  78         __u8    id;
  79         __u8    status;
  80         __le32  total_bw;
  81         __le32  max_bw;
  82         __le32  min_latency;
  83         __le16  pal_cap;
  84         __le16  assoc_size;
  85 } __packed;
  86
  87 #define A2MP_GETAMPASSOC_REQ     0x08
  88 struct a2mp_amp_assoc_req {
  89         __u8    id;
  90 } __packed;
  91
  92 #define A2MP_GETAMPASSOC_RSP     0x09
  93 struct a2mp_amp_assoc_rsp {
  94         __u8    id;
  95         __u8    status;
  96         __u8    amp_assoc[];
  97 } __packed;
  98
  99 #define A2MP_CREATEPHYSLINK_REQ  0x0A
 100 #define A2MP_DISCONNPHYSLINK_REQ 0x0C
 101 struct a2mp_physlink_req {
 102         __u8    local_id;
 103         __u8    remote_id;
 104         __u8    amp_assoc[];
 105 } __packed;
 106
 107 #define A2MP_CREATEPHYSLINK_RSP  0x0B
 108 #define A2MP_DISCONNPHYSLINK_RSP 0x0D
 109 struct a2mp_physlink_rsp {
 110         __u8    local_id;
 111         __u8    remote_id;
 112         __u8    status;
 113 } __packed;
 114
 115 /* A2MP response status */
 116 #define A2MP_STATUS_SUCCESS                     0x00
 117 #define A2MP_STATUS_INVALID_CTRL_ID             0x01
 118 #define A2MP_STATUS_UNABLE_START_LINK_CREATION  0x02
 119 #define A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS     0x02
 120 #define A2MP_STATUS_COLLISION_OCCURED           0x03
 121 #define A2MP_STATUS_DISCONN_REQ_RECVD           0x04
 122 #define A2MP_STATUS_PHYS_LINK_EXISTS            0x05
 123 #define A2MP_STATUS_SECURITY_VIOLATION          0x06
 124
 125 struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr);
 126
 127 #if IS_ENABLED(CONFIG_BT_HS)
 128 int amp_mgr_put(struct amp_mgr *mgr);
 129 struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
 130                                        struct sk_buff *skb);
 131 void a2mp_discover_amp(struct l2cap_chan *chan);
 132 #else
 133 static inline int amp_mgr_put(struct amp_mgr *mgr)
 134 {
 135         return 0;
 136 }
 137
 138 static inline struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
 139                                                      struct sk_buff *skb)
 140 {
 141         return NULL;
 142 }
 143
 144 static inline void a2mp_discover_amp(struct l2cap_chan *chan)
 145 {
 146 }
 147 #endif
 148
 149 void a2mp_send_getinfo_rsp(struct hci_dev *hdev);
 150 void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status);
 151 void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status);
 152 void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status);
 153
 154 #endif /* __A2MP_H */