2 * Marvell Wireless LAN device driver: generic TX/RX data handling
4 * Copyright (C) 2011, Marvell International Ltd.
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
28 * This function processes the received buffer.
30 * Main responsibility of this function is to parse the RxPD to
31 * identify the correct interface this packet is headed for and
32 * forwarding it to the associated handling function, where the
33 * packet will be further processed and sent to kernel/upper layer
36 int mwifiex_handle_rx_packet(struct mwifiex_adapter *adapter,
39 struct mwifiex_private *priv =
40 mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
41 struct rxpd *local_rx_pd;
42 struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
44 local_rx_pd = (struct rxpd *) (skb->data);
45 /* Get the BSS number from rxpd, get corresponding priv */
46 priv = mwifiex_get_priv_by_id(adapter, local_rx_pd->bss_num &
47 BSS_NUM_MASK, local_rx_pd->bss_type);
49 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
51 rx_info->bss_num = priv->bss_num;
52 rx_info->bss_type = priv->bss_type;
54 return mwifiex_process_sta_rx_packet(adapter, skb);
56 EXPORT_SYMBOL_GPL(mwifiex_handle_rx_packet);
59 * This function sends a packet to device.
61 * It processes the packet to add the TxPD, checks condition and
62 * sends the processed packet to firmware for transmission.
64 * On successful completion, the function calls the completion callback
67 int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb,
68 struct mwifiex_tx_param *tx_param)
71 struct mwifiex_adapter *adapter = priv->adapter;
73 struct txpd *local_tx_pd = NULL;
75 head_ptr = mwifiex_process_sta_txpd(priv, skb);
77 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
79 (struct txpd *) (head_ptr + INTF_HEADER_LEN);
80 if (adapter->iface_type == MWIFIEX_USB) {
81 adapter->data_sent = true;
82 skb_pull(skb, INTF_HEADER_LEN);
83 ret = adapter->if_ops.host_to_card(adapter,
87 ret = adapter->if_ops.host_to_card(adapter,
95 dev_err(adapter->dev, "data: -ENOSR is returned\n");
98 if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
99 (adapter->pps_uapsd_mode) && (adapter->tx_lock_flag)) {
100 priv->adapter->tx_lock_flag = false;
102 local_tx_pd->flags = 0;
104 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
107 adapter->data_sent = false;
108 dev_err(adapter->dev, "mwifiex_write_data_async failed: 0x%X\n",
110 adapter->dbg.num_tx_host_to_card_failure++;
111 mwifiex_write_data_complete(adapter, skb, ret);
114 adapter->data_sent = false;
117 mwifiex_write_data_complete(adapter, skb, ret);
127 * Packet send completion callback handler.
129 * It either frees the buffer directly or forwards it to another
130 * completion callback which checks conditions, updates statistics,
131 * wakes up stalled traffic queue if required, and then frees the buffer.
133 int mwifiex_write_data_complete(struct mwifiex_adapter *adapter,
134 struct sk_buff *skb, int status)
136 struct mwifiex_private *priv, *tpriv;
137 struct mwifiex_txinfo *tx_info;
143 tx_info = MWIFIEX_SKB_TXCB(skb);
144 priv = mwifiex_get_priv_by_id(adapter, tx_info->bss_num,
149 if (adapter->iface_type == MWIFIEX_USB)
150 adapter->data_sent = false;
152 mwifiex_set_trans_start(priv->netdev);
154 priv->stats.tx_packets++;
155 priv->stats.tx_bytes += skb->len;
157 priv->stats.tx_errors++;
160 if (atomic_dec_return(&adapter->tx_pending) >= LOW_TX_PENDING)
163 for (i = 0; i < adapter->priv_num; i++) {
164 tpriv = adapter->priv[i];
166 if (tpriv->media_connected &&
167 netif_queue_stopped(tpriv->netdev))
168 mwifiex_wake_up_net_dev_queue(tpriv->netdev, adapter);
171 dev_kfree_skb_any(skb);
175 EXPORT_SYMBOL_GPL(mwifiex_write_data_complete);