bc8564bddc
The controller doesn't support this feature and the only driver that was needing it (h4.c) will be converted not to rely on it in the next patch. Change-Id: Ia514b79b6d05aa128768c2355353b7797e8b8977 Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/** @file
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* @brief Bluetooth data buffer API
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*/
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/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __BT_BUF_H
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#define __BT_BUF_H
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/**
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* @brief Data buffers
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* @defgroup bt_buf Data buffers
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* @ingroup bluetooth
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* @{
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*/
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#include <stdint.h>
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#include <net/buf.h>
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#include <bluetooth/hci.h>
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/** Possible types of buffers passed around the Bluetooth stack */
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enum bt_buf_type {
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/** HCI command */
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BT_BUF_CMD,
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/** HCI event */
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BT_BUF_EVT,
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/** Outgoing ACL data */
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BT_BUF_ACL_OUT,
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/** Incoming ACL data */
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BT_BUF_ACL_IN,
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};
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/** Minimum amount of user data size for buffers passed to the stack. */
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#define BT_BUF_USER_DATA_MIN 4
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/** Data size neeed for HCI RX buffers */
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#define BT_BUF_RX_SIZE (CONFIG_BLUETOOTH_HCI_RECV_RESERVE + \
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sizeof(struct bt_hci_acl_hdr) + \
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CONFIG_BLUETOOTH_RX_BUF_LEN)
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/** Allocate a buffer for an HCI event
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*
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* This will set the BT_BUF_EVT buffer type so bt_buf_set_type()
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* doesn't need to be explicitly called.
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*
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* @param opcode HCI event opcode or 0 if not known
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* @param timeout Timeout in milliseconds, or one of the special values
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* K_NO_WAIT and K_FOREVER.
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* @return A new buffer with the BT_BUF_EVT type.
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*/
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struct net_buf *bt_buf_get_evt(uint8_t opcode, int32_t timeout);
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/** Allocate a buffer for incoming ACL data
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*
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* This will set the BT_BUF_ACL_IN buffer type so bt_buf_set_type()
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* doesn't need to be explicitly called.
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*
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* @param timeout Timeout in milliseconds, or one of the special values
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* K_NO_WAIT and K_FOREVER.
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* @return A new buffer with the BT_BUF_ACL_IN type.
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*/
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struct net_buf *bt_buf_get_acl(int32_t timeout);
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/** Set the buffer type
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*
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* @param buf Bluetooth buffer
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* @param type The BT_* type to set the buffer to
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*/
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static inline void bt_buf_set_type(struct net_buf *buf, enum bt_buf_type type)
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{
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*(uint8_t *)net_buf_user_data(buf) = type;
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}
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/** Get the buffer type
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*
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* @param buf Bluetooth buffer
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*
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* @return The BT_* type to of the buffer
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*/
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static inline enum bt_buf_type bt_buf_get_type(struct net_buf *buf)
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{
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return *(uint8_t *)net_buf_user_data(buf);
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}
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/**
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* @}
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*/
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#endif /* __BT_BUF_H */
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