1/*
  2   BlueZ - Bluetooth protocol stack for Linux
  3   Copyright (C) 2014 Intel Corporation
  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 as
  7   published by the Free Software Foundation;
  8
  9   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 10   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 11   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
 12   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
 13   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
 14   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 15   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 16   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 17
 18   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
 19   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
 20   SOFTWARE IS DISCLAIMED.
 21*/
 22
 23#include <asm/unaligned.h>
 24
 25#define hci_req_sync_lock(hdev)   mutex_lock(&hdev->req_lock)
 26#define hci_req_sync_unlock(hdev) mutex_unlock(&hdev->req_lock)
 27
 28struct hci_request {
 29	struct hci_dev		*hdev;
 30	struct sk_buff_head	cmd_q;
 31
 32	/* If something goes wrong when building the HCI request, the error
 33	 * value is stored in this field.
 34	 */
 35	int			err;
 36};
 37
 38void hci_req_init(struct hci_request *req, struct hci_dev *hdev);
 39void hci_req_purge(struct hci_request *req);
 40int hci_req_run(struct hci_request *req, hci_req_complete_t complete);
 41int hci_req_run_skb(struct hci_request *req, hci_req_complete_skb_t complete);
 42void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
 43		 const void *param);
 44void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
 45		    const void *param, u8 event);
 46void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
 47			  hci_req_complete_t *req_complete,
 48			  hci_req_complete_skb_t *req_complete_skb);
 49
 50int hci_req_sync(struct hci_dev *hdev, int (*req)(struct hci_request *req,
 51						  unsigned long opt),
 52		 unsigned long opt, u32 timeout, u8 *hci_status);
 53int __hci_req_sync(struct hci_dev *hdev, int (*func)(struct hci_request *req,
 54						     unsigned long opt),
 55		   unsigned long opt, u32 timeout, u8 *hci_status);
 56void hci_req_sync_cancel(struct hci_dev *hdev, int err);
 57
 58struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode, u32 plen,
 59				const void *param);
 60
 61int __hci_req_hci_power_on(struct hci_dev *hdev);
 62
 63void __hci_req_write_fast_connectable(struct hci_request *req, bool enable);
 64void __hci_req_update_name(struct hci_request *req);
 65void __hci_req_update_eir(struct hci_request *req);
 66
 67void hci_req_add_le_scan_disable(struct hci_request *req);
 68void hci_req_add_le_passive_scan(struct hci_request *req);
 69
 70void hci_req_reenable_advertising(struct hci_dev *hdev);
 71void __hci_req_enable_advertising(struct hci_request *req);
 72void __hci_req_disable_advertising(struct hci_request *req);
 73void __hci_req_update_adv_data(struct hci_request *req, u8 instance);
 74int hci_req_update_adv_data(struct hci_dev *hdev, u8 instance);
 75void __hci_req_update_scan_rsp_data(struct hci_request *req, u8 instance);
 76
 77int __hci_req_schedule_adv_instance(struct hci_request *req, u8 instance,
 78				    bool force);
 79void hci_req_clear_adv_instance(struct hci_dev *hdev, struct sock *sk,
 80				struct hci_request *req, u8 instance,
 81				bool force);
 82
 83void __hci_req_update_class(struct hci_request *req);
 84
 85/* Returns true if HCI commands were queued */
 86bool hci_req_stop_discovery(struct hci_request *req);
 87
 88static inline void hci_req_update_scan(struct hci_dev *hdev)
 89{
 90	queue_work(hdev->req_workqueue, &hdev->scan_update);
 91}
 92
 93void __hci_req_update_scan(struct hci_request *req);
 94
 95int hci_update_random_address(struct hci_request *req, bool require_privacy,
 96			      bool use_rpa, u8 *own_addr_type);
 97
 98int hci_abort_conn(struct hci_conn *conn, u8 reason);
 99void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn,
100		      u8 reason);
101
102static inline void hci_update_background_scan(struct hci_dev *hdev)
103{
104	queue_work(hdev->req_workqueue, &hdev->bg_scan_update);
105}
106
107void hci_request_setup(struct hci_dev *hdev);
108void hci_request_cancel_all(struct hci_dev *hdev);
109
110u8 append_local_name(struct hci_dev *hdev, u8 *ptr, u8 ad_len);
111
112static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type,
113				  u8 *data, u8 data_len)
114{
115	eir[eir_len++] = sizeof(type) + data_len;
116	eir[eir_len++] = type;
117	memcpy(&eir[eir_len], data, data_len);
118	eir_len += data_len;
119
120	return eir_len;
121}
122
123static inline u16 eir_append_le16(u8 *eir, u16 eir_len, u8 type, u16 data)
124{
125	eir[eir_len++] = sizeof(type) + sizeof(data);
126	eir[eir_len++] = type;
127	put_unaligned_le16(data, &eir[eir_len]);
128	eir_len += sizeof(data);
129
130	return eir_len;
131}