linux/drivers/net/wireless/marvell/mwifiex/sta_tx.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * NXP Wireless LAN device driver: station TX data handling
 *
 * Copyright 2011-2020 NXP
 */

#include "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "wmm.h"

/*
 * This function fills the TxPD for tx packets.
 *
 * The Tx buffer received by this function should already have the
 * header space allocated for TxPD.
 *
 * This function inserts the TxPD in between interface header and actual
 * data and adjusts the buffer pointers accordingly.
 *
 * The following TxPD fields are set by this function, as required -
 *      - BSS number
 *      - Tx packet length and offset
 *      - Priority
 *      - Packet delay
 *      - Priority specific Tx control
 *      - Flags
 */
void mwifiex_process_sta_txpd(struct mwifiex_private *priv,
			      struct sk_buff *skb)
{ … }

/*
 * This function tells firmware to send a NULL data packet.
 *
 * The function creates a NULL data packet with TxPD and sends to the
 * firmware for transmission, with highest priority setting.
 */
int mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags)
{ … }

/*
 * This function checks if we need to send last packet indication.
 */
u8
mwifiex_check_last_packet_indication(struct mwifiex_private *priv)
{ … }