linux/net/bluetooth/hci_request.h
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   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_pause_adv_instances(struct hci_request *req);
  75int hci_req_resume_adv_instances(struct hci_dev *hdev);
  76void hci_req_reenable_advertising(struct hci_dev *hdev);
  77void __hci_req_enable_advertising(struct hci_request *req);
  78void __hci_req_disable_advertising(struct hci_request *req);
  79void __hci_req_update_adv_data(struct hci_request *req, u8 instance);
  80int hci_req_update_adv_data(struct hci_dev *hdev, u8 instance);
  81void __hci_req_update_scan_rsp_data(struct hci_request *req, u8 instance);
  82
  83int __hci_req_schedule_adv_instance(struct hci_request *req, u8 instance,
  84                                    bool force);
  85void hci_req_clear_adv_instance(struct hci_dev *hdev, struct sock *sk,
  86                                struct hci_request *req, u8 instance,
  87                                bool force);
  88
  89int __hci_req_setup_ext_adv_instance(struct hci_request *req, u8 instance);
  90int __hci_req_start_ext_adv(struct hci_request *req, u8 instance);
  91int __hci_req_enable_ext_advertising(struct hci_request *req, u8 instance);
  92int __hci_req_disable_ext_adv_instance(struct hci_request *req, u8 instance);
  93int __hci_req_remove_ext_adv_instance(struct hci_request *req, u8 instance);
  94void __hci_req_clear_ext_adv_sets(struct hci_request *req);
  95int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
  96                           bool use_rpa, struct adv_info *adv_instance,
  97                           u8 *own_addr_type, bdaddr_t *rand_addr);
  98
  99void __hci_req_update_class(struct hci_request *req);
 100
 101/* Returns true if HCI commands were queued */
 102bool hci_req_stop_discovery(struct hci_request *req);
 103
 104static inline void hci_req_update_scan(struct hci_dev *hdev)
 105{
 106        queue_work(hdev->req_workqueue, &hdev->scan_update);
 107}
 108
 109void __hci_req_update_scan(struct hci_request *req);
 110
 111int hci_update_random_address(struct hci_request *req, bool require_privacy,
 112                              bool use_rpa, u8 *own_addr_type);
 113
 114int hci_abort_conn(struct hci_conn *conn, u8 reason);
 115void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn,
 116                      u8 reason);
 117
 118static inline void hci_update_background_scan(struct hci_dev *hdev)
 119{
 120        queue_work(hdev->req_workqueue, &hdev->bg_scan_update);
 121}
 122
 123void hci_request_setup(struct hci_dev *hdev);
 124void hci_request_cancel_all(struct hci_dev *hdev);
 125
 126u8 append_local_name(struct hci_dev *hdev, u8 *ptr, u8 ad_len);
 127
 128static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type,
 129                                  u8 *data, u8 data_len)
 130{
 131        eir[eir_len++] = sizeof(type) + data_len;
 132        eir[eir_len++] = type;
 133        memcpy(&eir[eir_len], data, data_len);
 134        eir_len += data_len;
 135
 136        return eir_len;
 137}
 138
 139static inline u16 eir_append_le16(u8 *eir, u16 eir_len, u8 type, u16 data)
 140{
 141        eir[eir_len++] = sizeof(type) + sizeof(data);
 142        eir[eir_len++] = type;
 143        put_unaligned_le16(data, &eir[eir_len]);
 144        eir_len += sizeof(data);
 145
 146        return eir_len;
 147}
 148