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);
 40bool hci_req_status_pend(struct hci_dev *hdev);
 41int hci_req_run(struct hci_request *req, hci_req_complete_t complete);
 42int hci_req_run_skb(struct hci_request *req, hci_req_complete_skb_t complete);
 43void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
 44		 const void *param);
 45void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
 46		    const void *param, u8 event);
 47void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
 48			  hci_req_complete_t *req_complete,
 49			  hci_req_complete_skb_t *req_complete_skb);
 50
 51int hci_req_sync(struct hci_dev *hdev, int (*req)(struct hci_request *req,
 52						  unsigned long opt),
 53		 unsigned long opt, u32 timeout, u8 *hci_status);
 54int __hci_req_sync(struct hci_dev *hdev, int (*func)(struct hci_request *req,
 55						     unsigned long opt),
 56		   unsigned long opt, u32 timeout, u8 *hci_status);
 57void hci_req_sync_cancel(struct hci_dev *hdev, int err);
 58
 59struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode, u32 plen,
 60				const void *param);
 61
 62int __hci_req_hci_power_on(struct hci_dev *hdev);
 63
 64void __hci_req_write_fast_connectable(struct hci_request *req, bool enable);
 65void __hci_req_update_name(struct hci_request *req);
 66void __hci_req_update_eir(struct hci_request *req);
 67
 68void hci_req_add_le_scan_disable(struct hci_request *req, bool rpa_le_conn);
 69void hci_req_add_le_passive_scan(struct hci_request *req);
 70
 71void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next);
 72
 73void hci_req_disable_address_resolution(struct hci_dev *hdev);
 74void hci_req_reenable_advertising(struct hci_dev *hdev);
 75void __hci_req_enable_advertising(struct hci_request *req);
 76void __hci_req_disable_advertising(struct hci_request *req);
 77void __hci_req_update_adv_data(struct hci_request *req, u8 instance);
 78int hci_req_update_adv_data(struct hci_dev *hdev, u8 instance);
 79void __hci_req_update_scan_rsp_data(struct hci_request *req, u8 instance);
 80
 81int __hci_req_schedule_adv_instance(struct hci_request *req, u8 instance,
 82				    bool force);
 83void hci_req_clear_adv_instance(struct hci_dev *hdev, struct sock *sk,
 84				struct hci_request *req, u8 instance,
 85				bool force);
 86
 87int __hci_req_setup_ext_adv_instance(struct hci_request *req, u8 instance);
 88int __hci_req_start_ext_adv(struct hci_request *req, u8 instance);
 89int __hci_req_enable_ext_advertising(struct hci_request *req, u8 instance);
 90int __hci_req_disable_ext_adv_instance(struct hci_request *req, u8 instance);
 91int __hci_req_remove_ext_adv_instance(struct hci_request *req, u8 instance);
 92void __hci_req_clear_ext_adv_sets(struct hci_request *req);
 93int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
 94			   bool use_rpa, struct adv_info *adv_instance,
 95			   u8 *own_addr_type, bdaddr_t *rand_addr);
 96
 97void __hci_req_update_class(struct hci_request *req);
 98
 99/* Returns true if HCI commands were queued */
100bool hci_req_stop_discovery(struct hci_request *req);
101
102static inline void hci_req_update_scan(struct hci_dev *hdev)
103{
104	queue_work(hdev->req_workqueue, &hdev->scan_update);
105}
106
107void __hci_req_update_scan(struct hci_request *req);
108
109int hci_update_random_address(struct hci_request *req, bool require_privacy,
110			      bool use_rpa, u8 *own_addr_type);
111
112int hci_abort_conn(struct hci_conn *conn, u8 reason);
113void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn,
114		      u8 reason);
115
116static inline void hci_update_background_scan(struct hci_dev *hdev)
117{
118	queue_work(hdev->req_workqueue, &hdev->bg_scan_update);
119}
120
121void hci_request_setup(struct hci_dev *hdev);
122void hci_request_cancel_all(struct hci_dev *hdev);
123
124u8 append_local_name(struct hci_dev *hdev, u8 *ptr, u8 ad_len);
125
126static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type,
127				  u8 *data, u8 data_len)
128{
129	eir[eir_len++] = sizeof(type) + data_len;
130	eir[eir_len++] = type;
131	memcpy(&eir[eir_len], data, data_len);
132	eir_len += data_len;
133
134	return eir_len;
135}
136
137static inline u16 eir_append_le16(u8 *eir, u16 eir_len, u8 type, u16 data)
138{
139	eir[eir_len++] = sizeof(type) + sizeof(data);
140	eir[eir_len++] = type;
141	put_unaligned_le16(data, &eir[eir_len]);
142	eir_len += sizeof(data);
143
144	return eir_len;
145}