2 * Marvell Wireless LAN device driver: generic TX/RX data handling
4 * Copyright (C) 2011-2014, 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);
45 local_rx_pd = (struct rxpd *) (skb->data);
46 /* Get the BSS number from rxpd, get corresponding priv */
47 priv = mwifiex_get_priv_by_id(adapter, local_rx_pd->bss_num &
48 BSS_NUM_MASK, local_rx_pd->bss_type);
50 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
53 mwifiex_dbg(adapter, ERROR,
54 "data: priv not found. Drop RX packet\n");
55 dev_kfree_skb_any(skb);
59 mwifiex_dbg_dump(adapter, DAT_D, "rx pkt:", skb->data,
60 min_t(size_t, skb->len, DEBUG_DUMP_DATA_MAX_LEN));
62 memset(rx_info, 0, sizeof(*rx_info));
63 rx_info->bss_num = priv->bss_num;
64 rx_info->bss_type = priv->bss_type;
66 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
67 ret = mwifiex_process_uap_rx_packet(priv, skb);
69 ret = mwifiex_process_sta_rx_packet(priv, skb);
73 EXPORT_SYMBOL_GPL(mwifiex_handle_rx_packet);
76 * This function sends a packet to device.
78 * It processes the packet to add the TxPD, checks condition and
79 * sends the processed packet to firmware for transmission.
81 * On successful completion, the function calls the completion callback
84 int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb,
85 struct mwifiex_tx_param *tx_param)
88 struct mwifiex_adapter *adapter = priv->adapter;
90 struct txpd *local_tx_pd = NULL;
91 struct mwifiex_sta_node *dest_node;
92 struct ethhdr *hdr = (void *)skb->data;
94 hroom = (adapter->iface_type == MWIFIEX_USB) ? 0 : INTF_HEADER_LEN;
96 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) {
97 dest_node = mwifiex_get_sta_entry(priv, hdr->h_dest);
99 dest_node->stats.tx_bytes += skb->len;
100 dest_node->stats.tx_packets++;
103 head_ptr = mwifiex_process_uap_txpd(priv, skb);
105 head_ptr = mwifiex_process_sta_txpd(priv, skb);
108 if ((adapter->data_sent || adapter->tx_lock_flag) && head_ptr) {
109 skb_queue_tail(&adapter->tx_data_q, skb);
110 atomic_inc(&adapter->tx_queued);
115 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
116 local_tx_pd = (struct txpd *)(head_ptr + hroom);
117 if (adapter->iface_type == MWIFIEX_USB) {
118 ret = adapter->if_ops.host_to_card(adapter,
122 ret = adapter->if_ops.host_to_card(adapter,
127 mwifiex_dbg_dump(adapter, DAT_D, "tx pkt:", skb->data,
128 min_t(size_t, skb->len, DEBUG_DUMP_DATA_MAX_LEN));
132 mwifiex_dbg(adapter, DATA, "data: -ENOSR is returned\n");
135 if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
136 (adapter->pps_uapsd_mode) && (adapter->tx_lock_flag)) {
137 priv->adapter->tx_lock_flag = false;
139 local_tx_pd->flags = 0;
141 mwifiex_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
144 mwifiex_dbg(adapter, ERROR,
145 "mwifiex_write_data_async failed: 0x%X\n",
147 adapter->dbg.num_tx_host_to_card_failure++;
148 mwifiex_write_data_complete(adapter, skb, 0, ret);
153 mwifiex_write_data_complete(adapter, skb, 0, ret);
162 static int mwifiex_host_to_card(struct mwifiex_adapter *adapter,
164 struct mwifiex_tx_param *tx_param)
166 struct txpd *local_tx_pd = NULL;
167 u8 *head_ptr = skb->data;
169 struct mwifiex_private *priv;
170 struct mwifiex_txinfo *tx_info;
172 tx_info = MWIFIEX_SKB_TXCB(skb);
173 priv = mwifiex_get_priv_by_id(adapter, tx_info->bss_num,
176 mwifiex_dbg(adapter, ERROR,
177 "data: priv not found. Drop TX packet\n");
178 adapter->dbg.num_tx_host_to_card_failure++;
179 mwifiex_write_data_complete(adapter, skb, 0, 0);
182 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
183 if (adapter->iface_type == MWIFIEX_USB)
184 local_tx_pd = (struct txpd *)head_ptr;
186 local_tx_pd = (struct txpd *) (head_ptr +
190 if (adapter->iface_type == MWIFIEX_USB) {
191 ret = adapter->if_ops.host_to_card(adapter,
195 ret = adapter->if_ops.host_to_card(adapter,
201 mwifiex_dbg(adapter, ERROR, "data: -ENOSR is returned\n");
204 if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
205 (adapter->pps_uapsd_mode) &&
206 (adapter->tx_lock_flag)) {
207 priv->adapter->tx_lock_flag = false;
209 local_tx_pd->flags = 0;
211 skb_queue_head(&adapter->tx_data_q, skb);
212 if (tx_info->flags & MWIFIEX_BUF_FLAG_AGGR_PKT)
213 atomic_add(tx_info->aggr_num, &adapter->tx_queued);
215 atomic_inc(&adapter->tx_queued);
216 mwifiex_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
219 mwifiex_dbg(adapter, ERROR,
220 "mwifiex_write_data_async failed: 0x%X\n", ret);
221 adapter->dbg.num_tx_host_to_card_failure++;
222 mwifiex_write_data_complete(adapter, skb, 0, ret);
227 mwifiex_write_data_complete(adapter, skb, 0, ret);
236 mwifiex_dequeue_tx_queue(struct mwifiex_adapter *adapter)
238 struct sk_buff *skb, *skb_next;
239 struct mwifiex_txinfo *tx_info;
240 struct mwifiex_tx_param tx_param;
242 skb = skb_dequeue(&adapter->tx_data_q);
246 tx_info = MWIFIEX_SKB_TXCB(skb);
247 if (tx_info->flags & MWIFIEX_BUF_FLAG_AGGR_PKT)
248 atomic_sub(tx_info->aggr_num, &adapter->tx_queued);
250 atomic_dec(&adapter->tx_queued);
252 if (!skb_queue_empty(&adapter->tx_data_q))
253 skb_next = skb_peek(&adapter->tx_data_q);
256 tx_param.next_pkt_len = ((skb_next) ? skb_next->len : 0);
257 if (!tx_param.next_pkt_len) {
258 if (!mwifiex_wmm_lists_empty(adapter))
259 tx_param.next_pkt_len = 1;
261 return mwifiex_host_to_card(adapter, skb, &tx_param);
265 mwifiex_process_tx_queue(struct mwifiex_adapter *adapter)
268 if (adapter->data_sent || adapter->tx_lock_flag)
270 if (mwifiex_dequeue_tx_queue(adapter))
272 } while (!skb_queue_empty(&adapter->tx_data_q));
276 * Packet send completion callback handler.
278 * It either frees the buffer directly or forwards it to another
279 * completion callback which checks conditions, updates statistics,
280 * wakes up stalled traffic queue if required, and then frees the buffer.
282 int mwifiex_write_data_complete(struct mwifiex_adapter *adapter,
283 struct sk_buff *skb, int aggr, int status)
285 struct mwifiex_private *priv;
286 struct mwifiex_txinfo *tx_info;
287 struct netdev_queue *txq;
293 tx_info = MWIFIEX_SKB_TXCB(skb);
294 priv = mwifiex_get_priv_by_id(adapter, tx_info->bss_num,
299 mwifiex_set_trans_start(priv->netdev);
301 priv->stats.tx_packets++;
302 priv->stats.tx_bytes += tx_info->pkt_len;
303 if (priv->tx_timeout_cnt)
304 priv->tx_timeout_cnt = 0;
306 priv->stats.tx_errors++;
309 if (tx_info->flags & MWIFIEX_BUF_FLAG_BRIDGED_PKT)
310 atomic_dec_return(&adapter->pending_bridged_pkts);
312 if (tx_info->flags & MWIFIEX_BUF_FLAG_AGGR_PKT)
316 /* For skb_aggr, do not wake up tx queue */
319 atomic_dec(&adapter->tx_pending);
321 index = mwifiex_1d_to_wmm_queue[skb->priority];
322 if (atomic_dec_return(&priv->wmm_tx_pending[index]) < LOW_TX_PENDING) {
323 txq = netdev_get_tx_queue(priv->netdev, index);
324 if (netif_tx_queue_stopped(txq)) {
325 netif_tx_wake_queue(txq);
326 mwifiex_dbg(adapter, DATA, "wake queue: %d\n", index);
330 dev_kfree_skb_any(skb);
334 EXPORT_SYMBOL_GPL(mwifiex_write_data_complete);
336 void mwifiex_parse_tx_status_event(struct mwifiex_private *priv,
339 struct tx_status_event *tx_status = (void *)priv->adapter->event_body;
340 struct sk_buff *ack_skb;
342 struct mwifiex_txinfo *tx_info;
344 if (!tx_status->tx_token_id)
347 spin_lock_irqsave(&priv->ack_status_lock, flags);
348 ack_skb = idr_find(&priv->ack_status_frames, tx_status->tx_token_id);
350 idr_remove(&priv->ack_status_frames, tx_status->tx_token_id);
351 spin_unlock_irqrestore(&priv->ack_status_lock, flags);
354 tx_info = MWIFIEX_SKB_TXCB(ack_skb);
356 if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS) {
357 /* consumes ack_skb */
358 skb_complete_wifi_ack(ack_skb, !tx_status->status);
360 /* Remove broadcast address which was added by driver */
361 memmove(ack_skb->data +
362 sizeof(struct ieee80211_hdr_3addr) +
363 MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(u16),
365 sizeof(struct ieee80211_hdr_3addr) +
366 MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(u16) +
367 ETH_ALEN, ack_skb->len -
368 (sizeof(struct ieee80211_hdr_3addr) +
369 MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(u16) +
371 ack_skb->len = ack_skb->len - ETH_ALEN;
372 /* Remove driver's proprietary header including 2 bytes
373 * of packet length and pass actual management frame buffer
376 cfg80211_mgmt_tx_status(&priv->wdev, tx_info->cookie,
378 MWIFIEX_MGMT_FRAME_HEADER_SIZE +
379 sizeof(u16), ack_skb->len -
380 (MWIFIEX_MGMT_FRAME_HEADER_SIZE
382 !tx_status->status, GFP_ATOMIC);
383 dev_kfree_skb_any(ack_skb);