LXR linux/net/bluetooth/hci

   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);
  39int hci_req_run(struct hci_request *req, hci_req_complete_t complete);
  40int hci_req_run_skb(struct hci_request *req, hci_req_complete_skb_t complete);
  41void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
  42                 const void *param);
  43void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
  44                    const void *param, u8 event);
  45void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
  46                          hci_req_complete_t *req_complete,
  47                          hci_req_complete_skb_t *req_complete_skb);
  48
  49int hci_req_sync(struct hci_dev *hdev, int (*req)(struct hci_request *req,
  50                                                  unsigned long opt),
  51                 unsigned long opt, u32 timeout, u8 *hci_status);
  52int __hci_req_sync(struct hci_dev *hdev, int (*func)(struct hci_request *req,
  53                                                     unsigned long opt),
  54                   unsigned long opt, u32 timeout, u8 *hci_status);
  55void hci_req_sync_cancel(struct hci_dev *hdev, int err);
  56
  57struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode, u32 plen,
  58                                const void *param);
  59
  60int __hci_req_hci_power_on(struct hci_dev *hdev);
  61
  62void __hci_req_write_fast_connectable(struct hci_request *req, bool enable);
  63void __hci_req_update_name(struct hci_request *req);
  64void __hci_req_update_eir(struct hci_request *req);
  65
  66void hci_req_add_le_scan_disable(struct hci_request *req);
  67void hci_req_add_le_passive_scan(struct hci_request *req);
  68
  69void hci_req_reenable_advertising(struct hci_dev *hdev);
  70void __hci_req_enable_advertising(struct hci_request *req);
  71void __hci_req_disable_advertising(struct hci_request *req);
  72void __hci_req_update_adv_data(struct hci_request *req, u8 instance);
  73int hci_req_update_adv_data(struct hci_dev *hdev, u8 instance);
  74void __hci_req_update_scan_rsp_data(struct hci_request *req, u8 instance);
  75
  76int __hci_req_schedule_adv_instance(struct hci_request *req, u8 instance,
  77                                    bool force);
  78void hci_req_clear_adv_instance(struct hci_dev *hdev, struct sock *sk,
  79                                struct hci_request *req, u8 instance,
  80                                bool force);
  81
  82void __hci_req_update_class(struct hci_request *req);
  83
  84/* Returns true if HCI commands were queued */
  85bool hci_req_stop_discovery(struct hci_request *req);
  86
  87static inline void hci_req_update_scan(struct hci_dev *hdev)
  88{
  89        queue_work(hdev->req_workqueue, &hdev->scan_update);
  90}
  91
  92void __hci_req_update_scan(struct hci_request *req);
  93
  94int hci_update_random_address(struct hci_request *req, bool require_privacy,
  95                              bool use_rpa, u8 *own_addr_type);
  96
  97int hci_abort_conn(struct hci_conn *conn, u8 reason);
  98void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn,
  99                      u8 reason);
 100
 101static inline void hci_update_background_scan(struct hci_dev *hdev)
 102{
 103        queue_work(hdev->req_workqueue, &hdev->bg_scan_update);
 104}
 105
 106void hci_request_setup(struct hci_dev *hdev);
 107void hci_request_cancel_all(struct hci_dev *hdev);
 108
 109u8 append_local_name(struct hci_dev *hdev, u8 *ptr, u8 ad_len);
 110
 111static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type,
 112                                  u8 *data, u8 data_len)
 113{
 114        eir[eir_len++] = sizeof(type) + data_len;
 115        eir[eir_len++] = type;
 116        memcpy(&eir[eir_len], data, data_len);
 117        eir_len += data_len;
 118
 119        return eir_len;
 120}
 121
 122static inline u16 eir_append_le16(u8 *eir, u16 eir_len, u8 type, u16 data)
 123{
 124        eir[eir_len++] = sizeof(type) + sizeof(data);
 125        eir[eir_len++] = type;
 126        put_unaligned_le16(data, &eir[eir_len]);
 127        eir_len += sizeof(data);
 128
 129        return eir_len;
 130}
 131