linux/net/bluetooth/a2mp.h
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   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
  13enum 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
  20struct 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
  35struct 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
  44struct a2mp_cmd_rej {
  45        __le16  reason;
  46        __u8    data[];
  47} __packed;
  48
  49#define A2MP_DISCOVER_REQ        0x02
  50struct a2mp_discov_req {
  51        __le16  mtu;
  52        __le16  ext_feat;
  53} __packed;
  54
  55struct a2mp_cl {
  56        __u8    id;
  57        __u8    type;
  58        __u8    status;
  59} __packed;
  60
  61#define A2MP_DISCOVER_RSP        0x03
  62struct 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
  72struct a2mp_info_req {
  73        __u8       id;
  74} __packed;
  75
  76#define A2MP_GETINFO_RSP         0x07
  77struct 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
  88struct a2mp_amp_assoc_req {
  89        __u8    id;
  90} __packed;
  91
  92#define A2MP_GETAMPASSOC_RSP     0x09
  93struct 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
 101struct 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
 109struct 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
 125struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr);
 126
 127#if IS_ENABLED(CONFIG_BT_HS)
 128int amp_mgr_put(struct amp_mgr *mgr);
 129struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
 130                                       struct sk_buff *skb);
 131void a2mp_discover_amp(struct l2cap_chan *chan);
 132#else
 133static inline int amp_mgr_put(struct amp_mgr *mgr)
 134{
 135        return 0;
 136}
 137
 138static inline struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
 139                                                     struct sk_buff *skb)
 140{
 141        return NULL;
 142}
 143
 144static inline void a2mp_discover_amp(struct l2cap_chan *chan)
 145{
 146}
 147#endif
 148
 149void a2mp_send_getinfo_rsp(struct hci_dev *hdev);
 150void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status);
 151void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status);
 152void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status);
 153
 154#endif /* __A2MP_H */
 155