/* SPDX-License-Identifier: GPL-2.0-only */

  /*
     Copyright (c) 2010,2011 Code Aurora Forum.  All rights reserved.
     Copyright (c) 2011,2012 Intel Corp.

  */
  
  #ifndef __A2MP_H
  #define __A2MP_H

  #include <net/bluetooth/l2cap.h>

  enum amp_mgr_state {
  	READ_LOC_AMP_INFO,

  	READ_LOC_AMP_ASSOC,

  	READ_LOC_AMP_ASSOC_FINAL,

  	WRITE_REMOTE_AMP_ASSOC,

  };

  struct amp_mgr {

  	struct list_head	list;

  	struct l2cap_conn	*l2cap_conn;
  	struct l2cap_chan	*a2mp_chan;

  	struct l2cap_chan	*bredr_chan;

  	struct kref		kref;
  	__u8			ident;
  	__u8			handle;

  	unsigned long		state;

  	unsigned long		flags;

  
  	struct list_head	amp_ctrls;
  	struct mutex		amp_ctrls_lock;

  };

  struct a2mp_cmd {
  	__u8	code;
  	__u8	ident;
  	__le16	len;

  	__u8	data[];

  } __packed;

  /* A2MP command codes */
  #define A2MP_COMMAND_REJ         0x01
  struct a2mp_cmd_rej {
  	__le16	reason;

  	__u8	data[];

  } __packed;
  
  #define A2MP_DISCOVER_REQ        0x02
  struct a2mp_discov_req {
  	__le16	mtu;
  	__le16	ext_feat;
  } __packed;
  
  struct a2mp_cl {
  	__u8	id;
  	__u8	type;
  	__u8	status;
  } __packed;
  
  #define A2MP_DISCOVER_RSP        0x03
  struct a2mp_discov_rsp {
  	__le16     mtu;
  	__le16     ext_feat;

  	struct a2mp_cl cl[];

  } __packed;
  
  #define A2MP_CHANGE_NOTIFY       0x04
  #define A2MP_CHANGE_RSP          0x05
  
  #define A2MP_GETINFO_REQ         0x06
  struct a2mp_info_req {
  	__u8       id;
  } __packed;
  
  #define A2MP_GETINFO_RSP         0x07
  struct a2mp_info_rsp {
  	__u8	id;
  	__u8	status;
  	__le32	total_bw;
  	__le32	max_bw;
  	__le32	min_latency;
  	__le16	pal_cap;
  	__le16	assoc_size;
  } __packed;
  
  #define A2MP_GETAMPASSOC_REQ     0x08
  struct a2mp_amp_assoc_req {
  	__u8	id;
  } __packed;
  
  #define A2MP_GETAMPASSOC_RSP     0x09
  struct a2mp_amp_assoc_rsp {
  	__u8	id;
  	__u8	status;

  	__u8	amp_assoc[];

  } __packed;
  
  #define A2MP_CREATEPHYSLINK_REQ  0x0A
  #define A2MP_DISCONNPHYSLINK_REQ 0x0C
  struct a2mp_physlink_req {
  	__u8	local_id;
  	__u8	remote_id;

  	__u8	amp_assoc[];

  } __packed;
  
  #define A2MP_CREATEPHYSLINK_RSP  0x0B
  #define A2MP_DISCONNPHYSLINK_RSP 0x0D
  struct a2mp_physlink_rsp {
  	__u8	local_id;
  	__u8	remote_id;
  	__u8	status;
  } __packed;

  /* A2MP response status */
  #define A2MP_STATUS_SUCCESS			0x00
  #define A2MP_STATUS_INVALID_CTRL_ID		0x01
  #define A2MP_STATUS_UNABLE_START_LINK_CREATION	0x02
  #define A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS	0x02
  #define A2MP_STATUS_COLLISION_OCCURED		0x03
  #define A2MP_STATUS_DISCONN_REQ_RECVD		0x04
  #define A2MP_STATUS_PHYS_LINK_EXISTS		0x05
  #define A2MP_STATUS_SECURITY_VIOLATION		0x06

  struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr);

  
  #if IS_ENABLED(CONFIG_BT_HS)

  int amp_mgr_put(struct amp_mgr *mgr);

  struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
  				       struct sk_buff *skb);

  void a2mp_discover_amp(struct l2cap_chan *chan);

  #else
  static inline int amp_mgr_put(struct amp_mgr *mgr)
  {
  	return 0;
  }
  
  static inline struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
  						     struct sk_buff *skb)
  {
  	return NULL;
  }
  
  static inline void a2mp_discover_amp(struct l2cap_chan *chan)
  {
  }
  #endif

  void a2mp_send_getinfo_rsp(struct hci_dev *hdev);

  void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status);

  void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status);

  void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status);

  
  #endif /* __A2MP_H */