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 dev_err(adapter
->dev
, "data: priv not found. Drop RX packet\n");
54 dev_kfree_skb_any(skb
);
58 memset(rx_info
, 0, sizeof(*rx_info
));
59 rx_info
->bss_num
= priv
->bss_num
;
60 rx_info
->bss_type
= priv
->bss_type
;
62 if (priv
->bss_role
== MWIFIEX_BSS_ROLE_UAP
)
63 ret
= mwifiex_process_uap_rx_packet(priv
, skb
);
65 ret
= mwifiex_process_sta_rx_packet(priv
, skb
);
69 EXPORT_SYMBOL_GPL(mwifiex_handle_rx_packet
);
72 * This function sends a packet to device.
74 * It processes the packet to add the TxPD, checks condition and
75 * sends the processed packet to firmware for transmission.
77 * On successful completion, the function calls the completion callback
80 int mwifiex_process_tx(struct mwifiex_private
*priv
, struct sk_buff
*skb
,
81 struct mwifiex_tx_param
*tx_param
)
84 struct mwifiex_adapter
*adapter
= priv
->adapter
;
86 struct txpd
*local_tx_pd
= NULL
;
88 hroom
= (adapter
->iface_type
== MWIFIEX_USB
) ? 0 : INTF_HEADER_LEN
;
90 if (priv
->bss_role
== MWIFIEX_BSS_ROLE_UAP
)
91 head_ptr
= mwifiex_process_uap_txpd(priv
, skb
);
93 head_ptr
= mwifiex_process_sta_txpd(priv
, skb
);
95 if ((adapter
->data_sent
|| adapter
->tx_lock_flag
) && head_ptr
) {
96 skb_queue_tail(&adapter
->tx_data_q
, skb
);
97 atomic_inc(&adapter
->tx_queued
);
102 if (GET_BSS_ROLE(priv
) == MWIFIEX_BSS_ROLE_STA
)
103 local_tx_pd
= (struct txpd
*)(head_ptr
+ hroom
);
104 if (adapter
->iface_type
== MWIFIEX_USB
) {
105 adapter
->data_sent
= true;
106 ret
= adapter
->if_ops
.host_to_card(adapter
,
110 ret
= adapter
->if_ops
.host_to_card(adapter
,
118 dev_dbg(adapter
->dev
, "data: -ENOSR is returned\n");
121 if ((GET_BSS_ROLE(priv
) == MWIFIEX_BSS_ROLE_STA
) &&
122 (adapter
->pps_uapsd_mode
) && (adapter
->tx_lock_flag
)) {
123 priv
->adapter
->tx_lock_flag
= false;
125 local_tx_pd
->flags
= 0;
127 dev_dbg(adapter
->dev
, "data: -EBUSY is returned\n");
130 if (adapter
->iface_type
!= MWIFIEX_PCIE
)
131 adapter
->data_sent
= false;
132 dev_err(adapter
->dev
, "mwifiex_write_data_async failed: 0x%X\n",
134 adapter
->dbg
.num_tx_host_to_card_failure
++;
135 mwifiex_write_data_complete(adapter
, skb
, 0, ret
);
138 if (adapter
->iface_type
!= MWIFIEX_PCIE
)
139 adapter
->data_sent
= false;
142 mwifiex_write_data_complete(adapter
, skb
, 0, ret
);
151 static int mwifiex_host_to_card(struct mwifiex_adapter
*adapter
,
153 struct mwifiex_tx_param
*tx_param
)
155 struct txpd
*local_tx_pd
= NULL
;
156 u8
*head_ptr
= skb
->data
;
158 struct mwifiex_private
*priv
;
159 struct mwifiex_txinfo
*tx_info
;
161 tx_info
= MWIFIEX_SKB_TXCB(skb
);
162 priv
= mwifiex_get_priv_by_id(adapter
, tx_info
->bss_num
,
165 dev_err(adapter
->dev
, "data: priv not found. Drop TX packet\n");
166 adapter
->dbg
.num_tx_host_to_card_failure
++;
167 mwifiex_write_data_complete(adapter
, skb
, 0, 0);
170 if (GET_BSS_ROLE(priv
) == MWIFIEX_BSS_ROLE_STA
) {
171 if (adapter
->iface_type
== MWIFIEX_USB
)
172 local_tx_pd
= (struct txpd
*)head_ptr
;
174 local_tx_pd
= (struct txpd
*) (head_ptr
+
178 if (adapter
->iface_type
== MWIFIEX_USB
) {
179 adapter
->data_sent
= true;
180 ret
= adapter
->if_ops
.host_to_card(adapter
,
184 ret
= adapter
->if_ops
.host_to_card(adapter
,
190 dev_err(adapter
->dev
, "data: -ENOSR is returned\n");
193 if ((GET_BSS_ROLE(priv
) == MWIFIEX_BSS_ROLE_STA
) &&
194 (adapter
->pps_uapsd_mode
) &&
195 (adapter
->tx_lock_flag
)) {
196 priv
->adapter
->tx_lock_flag
= false;
198 local_tx_pd
->flags
= 0;
200 skb_queue_head(&adapter
->tx_data_q
, skb
);
201 if (tx_info
->flags
& MWIFIEX_BUF_FLAG_AGGR_PKT
)
202 atomic_add(tx_info
->aggr_num
, &adapter
->tx_queued
);
204 atomic_inc(&adapter
->tx_queued
);
205 dev_dbg(adapter
->dev
, "data: -EBUSY is returned\n");
208 if (adapter
->iface_type
!= MWIFIEX_PCIE
)
209 adapter
->data_sent
= false;
210 dev_err(adapter
->dev
, "mwifiex_write_data_async failed: 0x%X\n",
212 adapter
->dbg
.num_tx_host_to_card_failure
++;
213 mwifiex_write_data_complete(adapter
, skb
, 0, ret
);
216 if (adapter
->iface_type
!= MWIFIEX_PCIE
)
217 adapter
->data_sent
= false;
220 mwifiex_write_data_complete(adapter
, skb
, 0, ret
);
229 mwifiex_dequeue_tx_queue(struct mwifiex_adapter
*adapter
)
231 struct sk_buff
*skb
, *skb_next
;
232 struct mwifiex_txinfo
*tx_info
;
233 struct mwifiex_tx_param tx_param
;
235 skb
= skb_dequeue(&adapter
->tx_data_q
);
239 tx_info
= MWIFIEX_SKB_TXCB(skb
);
240 if (tx_info
->flags
& MWIFIEX_BUF_FLAG_AGGR_PKT
)
241 atomic_sub(tx_info
->aggr_num
, &adapter
->tx_queued
);
243 atomic_dec(&adapter
->tx_queued
);
245 if (!skb_queue_empty(&adapter
->tx_data_q
))
246 skb_next
= skb_peek(&adapter
->tx_data_q
);
249 tx_param
.next_pkt_len
= ((skb_next
) ? skb_next
->len
: 0);
250 if (!tx_param
.next_pkt_len
) {
251 if (!mwifiex_wmm_lists_empty(adapter
))
252 tx_param
.next_pkt_len
= 1;
254 return mwifiex_host_to_card(adapter
, skb
, &tx_param
);
258 mwifiex_process_tx_queue(struct mwifiex_adapter
*adapter
)
261 if (adapter
->data_sent
|| adapter
->tx_lock_flag
)
263 if (mwifiex_dequeue_tx_queue(adapter
))
265 } while (!skb_queue_empty(&adapter
->tx_data_q
));
269 * Packet send completion callback handler.
271 * It either frees the buffer directly or forwards it to another
272 * completion callback which checks conditions, updates statistics,
273 * wakes up stalled traffic queue if required, and then frees the buffer.
275 int mwifiex_write_data_complete(struct mwifiex_adapter
*adapter
,
276 struct sk_buff
*skb
, int aggr
, int status
)
278 struct mwifiex_private
*priv
;
279 struct mwifiex_txinfo
*tx_info
;
280 struct netdev_queue
*txq
;
286 tx_info
= MWIFIEX_SKB_TXCB(skb
);
287 priv
= mwifiex_get_priv_by_id(adapter
, tx_info
->bss_num
,
292 if (adapter
->iface_type
== MWIFIEX_USB
)
293 adapter
->data_sent
= false;
295 mwifiex_set_trans_start(priv
->netdev
);
297 priv
->stats
.tx_packets
++;
298 priv
->stats
.tx_bytes
+= tx_info
->pkt_len
;
299 if (priv
->tx_timeout_cnt
)
300 priv
->tx_timeout_cnt
= 0;
302 priv
->stats
.tx_errors
++;
305 if (tx_info
->flags
& MWIFIEX_BUF_FLAG_BRIDGED_PKT
) {
306 atomic_dec_return(&adapter
->pending_bridged_pkts
);
307 if (tx_info
->flags
& MWIFIEX_BUF_FLAG_AGGR_PKT
)
312 /* For skb_aggr, do not wake up tx queue */
315 atomic_dec(&adapter
->tx_pending
);
317 index
= mwifiex_1d_to_wmm_queue
[skb
->priority
];
318 if (atomic_dec_return(&priv
->wmm_tx_pending
[index
]) < LOW_TX_PENDING
) {
319 txq
= netdev_get_tx_queue(priv
->netdev
, index
);
320 if (netif_tx_queue_stopped(txq
)) {
321 netif_tx_wake_queue(txq
);
322 dev_dbg(adapter
->dev
, "wake queue: %d\n", index
);
326 dev_kfree_skb_any(skb
);
330 EXPORT_SYMBOL_GPL(mwifiex_write_data_complete
);
332 void mwifiex_parse_tx_status_event(struct mwifiex_private
*priv
,
335 struct tx_status_event
*tx_status
= (void *)priv
->adapter
->event_body
;
336 struct sk_buff
*ack_skb
;
338 struct mwifiex_txinfo
*tx_info
;
340 if (!tx_status
->tx_token_id
)
343 spin_lock_irqsave(&priv
->ack_status_lock
, flags
);
344 ack_skb
= idr_find(&priv
->ack_status_frames
, tx_status
->tx_token_id
);
346 idr_remove(&priv
->ack_status_frames
, tx_status
->tx_token_id
);
347 spin_unlock_irqrestore(&priv
->ack_status_lock
, flags
);
350 tx_info
= MWIFIEX_SKB_TXCB(ack_skb
);
352 if (tx_info
->flags
& MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS
) {
353 /* consumes ack_skb */
354 skb_complete_wifi_ack(ack_skb
, !tx_status
->status
);
356 cfg80211_mgmt_tx_status(&priv
->wdev
, tx_info
->cookie
,
357 ack_skb
->data
, ack_skb
->len
,
358 !tx_status
->status
, GFP_ATOMIC
);
359 dev_kfree_skb_any(ack_skb
);