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5e6e3a92 BZ |
1 | /* |
2 | * Marvell Wireless LAN device driver: generic TX/RX data handling | |
3 | * | |
4 | * Copyright (C) 2011, Marvell International Ltd. | |
5 | * | |
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. | |
13 | * | |
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. | |
18 | */ | |
19 | ||
20 | #include "decl.h" | |
21 | #include "ioctl.h" | |
22 | #include "util.h" | |
23 | #include "fw.h" | |
24 | #include "main.h" | |
25 | #include "wmm.h" | |
26 | ||
27 | /* | |
28 | * This function processes the received buffer. | |
29 | * | |
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 | |
34 | * if required. | |
35 | */ | |
36 | int mwifiex_handle_rx_packet(struct mwifiex_adapter *adapter, | |
37 | struct sk_buff *skb) | |
38 | { | |
5e6e3a92 BZ |
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); | |
43 | ||
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); | |
48 | if (!priv) | |
49 | priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY); | |
50 | ||
9da9a3b2 YAP |
51 | rx_info->bss_num = priv->bss_num; |
52 | rx_info->bss_type = priv->bss_type; | |
5e6e3a92 | 53 | |
636c4598 | 54 | return mwifiex_process_sta_rx_packet(adapter, skb); |
5e6e3a92 BZ |
55 | } |
56 | EXPORT_SYMBOL_GPL(mwifiex_handle_rx_packet); | |
57 | ||
58 | /* | |
59 | * This function sends a packet to device. | |
60 | * | |
61 | * It processes the packet to add the TxPD, checks condition and | |
62 | * sends the processed packet to firmware for transmission. | |
63 | * | |
64 | * On successful completion, the function calls the completion callback | |
65 | * and logs the time. | |
66 | */ | |
67 | int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb, | |
68 | struct mwifiex_tx_param *tx_param) | |
69 | { | |
70 | int ret = -1; | |
71 | struct mwifiex_adapter *adapter = priv->adapter; | |
270e58e8 | 72 | u8 *head_ptr; |
5e6e3a92 BZ |
73 | struct txpd *local_tx_pd = NULL; |
74 | ||
a5ffddb7 | 75 | head_ptr = mwifiex_process_sta_txpd(priv, skb); |
5e6e3a92 BZ |
76 | if (head_ptr) { |
77 | if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) | |
78 | local_tx_pd = | |
79 | (struct txpd *) (head_ptr + INTF_HEADER_LEN); | |
4daffe35 AK |
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, | |
84 | MWIFIEX_USB_EP_DATA, | |
85 | skb, NULL); | |
86 | } else { | |
87 | ret = adapter->if_ops.host_to_card(adapter, | |
88 | MWIFIEX_TYPE_DATA, | |
89 | skb, tx_param); | |
90 | } | |
5e6e3a92 BZ |
91 | } |
92 | ||
93 | switch (ret) { | |
4daffe35 AK |
94 | case -ENOSR: |
95 | dev_err(adapter->dev, "data: -ENOSR is returned\n"); | |
96 | break; | |
5e6e3a92 BZ |
97 | case -EBUSY: |
98 | if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) && | |
c65a30f3 | 99 | (adapter->pps_uapsd_mode) && (adapter->tx_lock_flag)) { |
5e6e3a92 | 100 | priv->adapter->tx_lock_flag = false; |
3d82de0f YAP |
101 | if (local_tx_pd) |
102 | local_tx_pd->flags = 0; | |
5e6e3a92 BZ |
103 | } |
104 | dev_dbg(adapter->dev, "data: -EBUSY is returned\n"); | |
105 | break; | |
106 | case -1: | |
107 | adapter->data_sent = false; | |
108 | dev_err(adapter->dev, "mwifiex_write_data_async failed: 0x%X\n", | |
c65a30f3 | 109 | ret); |
5e6e3a92 BZ |
110 | adapter->dbg.num_tx_host_to_card_failure++; |
111 | mwifiex_write_data_complete(adapter, skb, ret); | |
112 | break; | |
113 | case -EINPROGRESS: | |
114 | adapter->data_sent = false; | |
115 | break; | |
116 | case 0: | |
117 | mwifiex_write_data_complete(adapter, skb, ret); | |
118 | break; | |
119 | default: | |
120 | break; | |
121 | } | |
122 | ||
123 | return ret; | |
124 | } | |
125 | ||
126 | /* | |
127 | * Packet send completion callback handler. | |
128 | * | |
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. | |
132 | */ | |
133 | int mwifiex_write_data_complete(struct mwifiex_adapter *adapter, | |
134 | struct sk_buff *skb, int status) | |
135 | { | |
270e58e8 YAP |
136 | struct mwifiex_private *priv, *tpriv; |
137 | struct mwifiex_txinfo *tx_info; | |
5e6e3a92 BZ |
138 | int i; |
139 | ||
140 | if (!skb) | |
141 | return 0; | |
142 | ||
143 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
9da9a3b2 | 144 | priv = mwifiex_get_priv_by_id(adapter, tx_info->bss_num, |
c65a30f3 | 145 | tx_info->bss_type); |
5e6e3a92 BZ |
146 | if (!priv) |
147 | goto done; | |
148 | ||
4daffe35 AK |
149 | if (adapter->iface_type == MWIFIEX_USB) |
150 | adapter->data_sent = false; | |
151 | ||
bbea3bc4 | 152 | mwifiex_set_trans_start(priv->netdev); |
5e6e3a92 BZ |
153 | if (!status) { |
154 | priv->stats.tx_packets++; | |
155 | priv->stats.tx_bytes += skb->len; | |
156 | } else { | |
157 | priv->stats.tx_errors++; | |
158 | } | |
62a5b7dc MY |
159 | |
160 | if (atomic_dec_return(&adapter->tx_pending) >= LOW_TX_PENDING) | |
161 | goto done; | |
5e6e3a92 BZ |
162 | |
163 | for (i = 0; i < adapter->priv_num; i++) { | |
164 | ||
165 | tpriv = adapter->priv[i]; | |
166 | ||
c65a30f3 YAP |
167 | if ((GET_BSS_ROLE(tpriv) == MWIFIEX_BSS_ROLE_STA) && |
168 | (tpriv->media_connected)) { | |
5e6e3a92 | 169 | if (netif_queue_stopped(tpriv->netdev)) |
bbea3bc4 | 170 | mwifiex_wake_up_net_dev_queue(tpriv->netdev, |
c65a30f3 | 171 | adapter); |
5e6e3a92 BZ |
172 | } |
173 | } | |
174 | done: | |
175 | dev_kfree_skb_any(skb); | |
176 | ||
177 | return 0; | |
178 | } | |
4daffe35 | 179 | EXPORT_SYMBOL_GPL(mwifiex_write_data_complete); |
5e6e3a92 | 180 |