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
amp_mgr_put(struct amp_mgr * mgr)140 static inline int amp_mgr_put(struct amp_mgr *mgr)
141 {
142 return 0;
143 }
144
a2mp_channel_create(struct l2cap_conn * conn,struct sk_buff * skb)145 static inline struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
146 struct sk_buff *skb)
147 {
148 return NULL;
149 }
150
a2mp_discover_amp(struct l2cap_chan * chan)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 */
162
