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);
52 dev_err(adapter->dev, "data: priv not found. Drop RX packet\n");
53 dev_kfree_skb_any(skb);
57 rx_info->bss_num = priv->bss_num;
58 rx_info->bss_type = priv->bss_type;
60 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
61 return mwifiex_process_uap_rx_packet(priv, skb);
63 return mwifiex_process_sta_rx_packet(priv, skb);
65 EXPORT_SYMBOL_GPL(mwifiex_handle_rx_packet);
68 * This function sends a packet to device.
70 * It processes the packet to add the TxPD, checks condition and
71 * sends the processed packet to firmware for transmission.
73 * On successful completion, the function calls the completion callback
76 int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb,
77 struct mwifiex_tx_param *tx_param)
80 struct mwifiex_adapter *adapter = priv->adapter;
82 struct txpd *local_tx_pd = NULL;
84 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
85 head_ptr = mwifiex_process_uap_txpd(priv, skb);
87 head_ptr = mwifiex_process_sta_txpd(priv, skb);
90 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
92 (struct txpd *) (head_ptr + INTF_HEADER_LEN);
93 if (adapter->iface_type == MWIFIEX_USB) {
94 adapter->data_sent = true;
95 skb_pull(skb, INTF_HEADER_LEN);
96 ret = adapter->if_ops.host_to_card(adapter,
100 ret = adapter->if_ops.host_to_card(adapter,
108 dev_err(adapter->dev, "data: -ENOSR is returned\n");
111 if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
112 (adapter->pps_uapsd_mode) && (adapter->tx_lock_flag)) {
113 priv->adapter->tx_lock_flag = false;
115 local_tx_pd->flags = 0;
117 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
120 if (adapter->iface_type != MWIFIEX_PCIE)
121 adapter->data_sent = false;
122 dev_err(adapter->dev, "mwifiex_write_data_async failed: 0x%X\n",
124 adapter->dbg.num_tx_host_to_card_failure++;
125 mwifiex_write_data_complete(adapter, skb, 0, ret);
128 if (adapter->iface_type != MWIFIEX_PCIE)
129 adapter->data_sent = false;
132 mwifiex_write_data_complete(adapter, skb, 0, ret);
142 * Packet send completion callback handler.
144 * It either frees the buffer directly or forwards it to another
145 * completion callback which checks conditions, updates statistics,
146 * wakes up stalled traffic queue if required, and then frees the buffer.
148 int mwifiex_write_data_complete(struct mwifiex_adapter *adapter,
149 struct sk_buff *skb, int aggr, int status)
151 struct mwifiex_private *priv;
152 struct mwifiex_txinfo *tx_info;
153 struct netdev_queue *txq;
159 tx_info = MWIFIEX_SKB_TXCB(skb);
160 priv = mwifiex_get_priv_by_id(adapter, tx_info->bss_num,
165 if (adapter->iface_type == MWIFIEX_USB)
166 adapter->data_sent = false;
168 mwifiex_set_trans_start(priv->netdev);
170 priv->stats.tx_packets++;
171 priv->stats.tx_bytes += skb->len;
172 if (priv->tx_timeout_cnt)
173 priv->tx_timeout_cnt = 0;
175 priv->stats.tx_errors++;
178 if (tx_info->flags & MWIFIEX_BUF_FLAG_BRIDGED_PKT)
179 atomic_dec_return(&adapter->pending_bridged_pkts);
182 /* For skb_aggr, do not wake up tx queue */
185 atomic_dec(&adapter->tx_pending);
187 index = mwifiex_1d_to_wmm_queue[skb->priority];
188 if (atomic_dec_return(&priv->wmm_tx_pending[index]) < LOW_TX_PENDING) {
189 txq = netdev_get_tx_queue(priv->netdev, index);
190 if (netif_tx_queue_stopped(txq)) {
191 netif_tx_wake_queue(txq);
192 dev_dbg(adapter->dev, "wake queue: %d\n", index);
196 dev_kfree_skb_any(skb);
200 EXPORT_SYMBOL_GPL(mwifiex_write_data_complete);