net/bluetooth/a2mp.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003    Copyright (c) 2010,2011 Code Aurora Forum.  All rights reserved.
0004    Copyright (c) 2011,2012 Intel Corp.
0005
0006 */
0007
0008 #ifndef __A2MP_H
0009 #define __A2MP_H
0010
0011 #include <net/bluetooth/l2cap.h>
0012
0013 enum amp_mgr_state {
0014     READ_LOC_AMP_INFO,
0015     READ_LOC_AMP_ASSOC,
0016     READ_LOC_AMP_ASSOC_FINAL,
0017     WRITE_REMOTE_AMP_ASSOC,
0018 };
0019
0020 struct amp_mgr {
0021     struct list_head    list;
0022     struct l2cap_conn   *l2cap_conn;
0023     struct l2cap_chan   *a2mp_chan;
0024     struct l2cap_chan   *bredr_chan;
0025     struct kref     kref;
0026     __u8            ident;
0027     __u8            handle;
0028     unsigned long       state;
0029     unsigned long       flags;
0030
0031     struct list_head    amp_ctrls;
0032     struct mutex        amp_ctrls_lock;
0033 };
0034
0035 struct a2mp_cmd {
0036     __u8    code;
0037     __u8    ident;
0038     __le16  len;
0039     __u8    data[];
0040 } __packed;
0041
0042 /* A2MP command codes */
0043 #define A2MP_COMMAND_REJ         0x01
0044 struct a2mp_cmd_rej {
0045     __le16  reason;
0046     __u8    data[];
0047 } __packed;
0048
0049 #define A2MP_DISCOVER_REQ        0x02
0050 struct a2mp_discov_req {
0051     __le16  mtu;
0052     __le16  ext_feat;
0053 } __packed;
0054
0055 struct a2mp_cl {
0056     __u8    id;
0057     __u8    type;
0058     __u8    status;
0059 } __packed;
0060
0061 #define A2MP_DISCOVER_RSP        0x03
0062 struct a2mp_discov_rsp {
0063     __le16     mtu;
0064     __le16     ext_feat;
0065     struct a2mp_cl cl[];
0066 } __packed;
0067
0068 #define A2MP_CHANGE_NOTIFY       0x04
0069 #define A2MP_CHANGE_RSP          0x05
0070
0071 #define A2MP_GETINFO_REQ         0x06
0072 struct a2mp_info_req {
0073     __u8       id;
0074 } __packed;
0075
0076 #define A2MP_GETINFO_RSP         0x07
0077 struct a2mp_info_rsp {
0078     __u8    id;
0079     __u8    status;
0080     __le32  total_bw;
0081     __le32  max_bw;
0082     __le32  min_latency;
0083     __le16  pal_cap;
0084     __le16  assoc_size;
0085 } __packed;
0086
0087 #define A2MP_GETAMPASSOC_REQ     0x08
0088 struct a2mp_amp_assoc_req {
0089     __u8    id;
0090 } __packed;
0091
0092 #define A2MP_GETAMPASSOC_RSP     0x09
0093 struct a2mp_amp_assoc_rsp {
0094     __u8    id;
0095     __u8    status;
0096     __u8    amp_assoc[];
0097 } __packed;
0098
0099 #define A2MP_CREATEPHYSLINK_REQ  0x0A
0100 #define A2MP_DISCONNPHYSLINK_REQ 0x0C
0101 struct a2mp_physlink_req {
0102     __u8    local_id;
0103     __u8    remote_id;
0104     __u8    amp_assoc[];
0105 } __packed;
0106
0107 #define A2MP_CREATEPHYSLINK_RSP  0x0B
0108 #define A2MP_DISCONNPHYSLINK_RSP 0x0D
0109 struct a2mp_physlink_rsp {
0110     __u8    local_id;
0111     __u8    remote_id;
0112     __u8    status;
0113 } __packed;
0114
0115 /* A2MP response status */
0116 #define A2MP_STATUS_SUCCESS         0x00
0117 #define A2MP_STATUS_INVALID_CTRL_ID     0x01
0118 #define A2MP_STATUS_UNABLE_START_LINK_CREATION  0x02
0119 #define A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS 0x02
0120 #define A2MP_STATUS_COLLISION_OCCURED       0x03
0121 #define A2MP_STATUS_DISCONN_REQ_RECVD       0x04
0122 #define A2MP_STATUS_PHYS_LINK_EXISTS        0x05
0123 #define A2MP_STATUS_SECURITY_VIOLATION      0x06
0124
0125 struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr);
0126
0127 #if IS_ENABLED(CONFIG_BT_HS)
0128 int amp_mgr_put(struct amp_mgr *mgr);
0129 struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
0130                        struct sk_buff *skb);
0131 void a2mp_discover_amp(struct l2cap_chan *chan);
0132 #else
0133 static inline int amp_mgr_put(struct amp_mgr *mgr)
0134 {
0135     return 0;
0136 }
0137
0138 static inline struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
0139                              struct sk_buff *skb)
0140 {
0141     return NULL;
0142 }
0143
0144 static inline void a2mp_discover_amp(struct l2cap_chan *chan)
0145 {
0146 }
0147 #endif
0148
0149 void a2mp_send_getinfo_rsp(struct hci_dev *hdev);
0150 void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status);
0151 void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status);
0152 void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status);
0153
0154 #endif /* __A2MP_H */