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[0];
40 } __packed;
41
42 /* A2MP command codes */
43 #define A2MP_COMMAND_REJ 0x01
44 struct a2mp_cmd_rej {
45 __le16 reason;
46 __u8 data[0];
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[0];
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[0];
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[0];
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
amp_mgr_put(struct amp_mgr * mgr)133 static inline int amp_mgr_put(struct amp_mgr *mgr)
134 {
135 return 0;
136 }
137
a2mp_channel_create(struct l2cap_conn * conn,struct sk_buff * skb)138 static inline struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
139 struct sk_buff *skb)
140 {
141 return NULL;
142 }
143
a2mp_discover_amp(struct l2cap_chan * chan)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 */
155