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 if (priv
->bss_role
== MWIFIEX_BSS_ROLE_UAP
)
55 return mwifiex_process_uap_rx_packet(adapter
, skb
);
57 return mwifiex_process_sta_rx_packet(adapter
, skb
);
59 EXPORT_SYMBOL_GPL(mwifiex_handle_rx_packet
);
62 * This function sends a packet to device.
64 * It processes the packet to add the TxPD, checks condition and
65 * sends the processed packet to firmware for transmission.
67 * On successful completion, the function calls the completion callback
70 int mwifiex_process_tx(struct mwifiex_private
*priv
, struct sk_buff
*skb
,
71 struct mwifiex_tx_param
*tx_param
)
74 struct mwifiex_adapter
*adapter
= priv
->adapter
;
76 struct txpd
*local_tx_pd
= NULL
;
78 head_ptr
= mwifiex_process_sta_txpd(priv
, skb
);
80 if (GET_BSS_ROLE(priv
) == MWIFIEX_BSS_ROLE_STA
)
82 (struct txpd
*) (head_ptr
+ INTF_HEADER_LEN
);
83 if (adapter
->iface_type
== MWIFIEX_USB
) {
84 adapter
->data_sent
= true;
85 skb_pull(skb
, INTF_HEADER_LEN
);
86 ret
= adapter
->if_ops
.host_to_card(adapter
,
90 ret
= adapter
->if_ops
.host_to_card(adapter
,
98 dev_err(adapter
->dev
, "data: -ENOSR is returned\n");
101 if ((GET_BSS_ROLE(priv
) == MWIFIEX_BSS_ROLE_STA
) &&
102 (adapter
->pps_uapsd_mode
) && (adapter
->tx_lock_flag
)) {
103 priv
->adapter
->tx_lock_flag
= false;
105 local_tx_pd
->flags
= 0;
107 dev_dbg(adapter
->dev
, "data: -EBUSY is returned\n");
110 adapter
->data_sent
= false;
111 dev_err(adapter
->dev
, "mwifiex_write_data_async failed: 0x%X\n",
113 adapter
->dbg
.num_tx_host_to_card_failure
++;
114 mwifiex_write_data_complete(adapter
, skb
, ret
);
117 adapter
->data_sent
= false;
120 mwifiex_write_data_complete(adapter
, skb
, ret
);
130 * Packet send completion callback handler.
132 * It either frees the buffer directly or forwards it to another
133 * completion callback which checks conditions, updates statistics,
134 * wakes up stalled traffic queue if required, and then frees the buffer.
136 int mwifiex_write_data_complete(struct mwifiex_adapter
*adapter
,
137 struct sk_buff
*skb
, int status
)
139 struct mwifiex_private
*priv
, *tpriv
;
140 struct mwifiex_txinfo
*tx_info
;
146 tx_info
= MWIFIEX_SKB_TXCB(skb
);
147 priv
= mwifiex_get_priv_by_id(adapter
, tx_info
->bss_num
,
152 if (adapter
->iface_type
== MWIFIEX_USB
)
153 adapter
->data_sent
= false;
155 mwifiex_set_trans_start(priv
->netdev
);
157 priv
->stats
.tx_packets
++;
158 priv
->stats
.tx_bytes
+= skb
->len
;
160 priv
->stats
.tx_errors
++;
163 if (tx_info
->flags
& MWIFIEX_BUF_FLAG_BRIDGED_PKT
)
164 atomic_dec_return(&adapter
->pending_bridged_pkts
);
165 if (atomic_dec_return(&adapter
->tx_pending
) >= LOW_TX_PENDING
)
168 for (i
= 0; i
< adapter
->priv_num
; i
++) {
169 tpriv
= adapter
->priv
[i
];
171 if (tpriv
->media_connected
&&
172 netif_queue_stopped(tpriv
->netdev
))
173 mwifiex_wake_up_net_dev_queue(tpriv
->netdev
, adapter
);
176 dev_kfree_skb_any(skb
);
180 EXPORT_SYMBOL_GPL(mwifiex_write_data_complete
);