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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 | ||
51 | rx_info->bss_index = priv->bss_index; | |
5e6e3a92 | 52 | |
636c4598 | 53 | return mwifiex_process_sta_rx_packet(adapter, skb); |
5e6e3a92 BZ |
54 | } |
55 | EXPORT_SYMBOL_GPL(mwifiex_handle_rx_packet); | |
56 | ||
57 | /* | |
58 | * This function sends a packet to device. | |
59 | * | |
60 | * It processes the packet to add the TxPD, checks condition and | |
61 | * sends the processed packet to firmware for transmission. | |
62 | * | |
63 | * On successful completion, the function calls the completion callback | |
64 | * and logs the time. | |
65 | */ | |
66 | int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb, | |
67 | struct mwifiex_tx_param *tx_param) | |
68 | { | |
69 | int ret = -1; | |
70 | struct mwifiex_adapter *adapter = priv->adapter; | |
270e58e8 | 71 | u8 *head_ptr; |
5e6e3a92 BZ |
72 | struct txpd *local_tx_pd = NULL; |
73 | ||
74 | head_ptr = (u8 *) mwifiex_process_sta_txpd(priv, skb); | |
75 | if (head_ptr) { | |
76 | if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) | |
77 | local_tx_pd = | |
78 | (struct txpd *) (head_ptr + INTF_HEADER_LEN); | |
79 | ||
80 | ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, | |
81 | skb->data, skb->len, tx_param); | |
82 | } | |
83 | ||
84 | switch (ret) { | |
85 | case -EBUSY: | |
86 | if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) && | |
87 | (adapter->pps_uapsd_mode) && | |
88 | (adapter->tx_lock_flag)) { | |
89 | priv->adapter->tx_lock_flag = false; | |
90 | local_tx_pd->flags = 0; | |
91 | } | |
92 | dev_dbg(adapter->dev, "data: -EBUSY is returned\n"); | |
93 | break; | |
94 | case -1: | |
95 | adapter->data_sent = false; | |
96 | dev_err(adapter->dev, "mwifiex_write_data_async failed: 0x%X\n", | |
97 | ret); | |
98 | adapter->dbg.num_tx_host_to_card_failure++; | |
99 | mwifiex_write_data_complete(adapter, skb, ret); | |
100 | break; | |
101 | case -EINPROGRESS: | |
102 | adapter->data_sent = false; | |
103 | break; | |
104 | case 0: | |
105 | mwifiex_write_data_complete(adapter, skb, ret); | |
106 | break; | |
107 | default: | |
108 | break; | |
109 | } | |
110 | ||
111 | return ret; | |
112 | } | |
113 | ||
114 | /* | |
115 | * Packet send completion callback handler. | |
116 | * | |
117 | * It either frees the buffer directly or forwards it to another | |
118 | * completion callback which checks conditions, updates statistics, | |
119 | * wakes up stalled traffic queue if required, and then frees the buffer. | |
120 | */ | |
121 | int mwifiex_write_data_complete(struct mwifiex_adapter *adapter, | |
122 | struct sk_buff *skb, int status) | |
123 | { | |
270e58e8 YAP |
124 | struct mwifiex_private *priv, *tpriv; |
125 | struct mwifiex_txinfo *tx_info; | |
5e6e3a92 BZ |
126 | int i; |
127 | ||
128 | if (!skb) | |
129 | return 0; | |
130 | ||
131 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
132 | priv = mwifiex_bss_index_to_priv(adapter, tx_info->bss_index); | |
133 | if (!priv) | |
134 | goto done; | |
135 | ||
136 | priv->netdev->trans_start = jiffies; | |
137 | if (!status) { | |
138 | priv->stats.tx_packets++; | |
139 | priv->stats.tx_bytes += skb->len; | |
140 | } else { | |
141 | priv->stats.tx_errors++; | |
142 | } | |
143 | atomic_dec(&adapter->tx_pending); | |
144 | ||
145 | for (i = 0; i < adapter->priv_num; i++) { | |
146 | ||
147 | tpriv = adapter->priv[i]; | |
148 | ||
149 | if ((GET_BSS_ROLE(tpriv) == MWIFIEX_BSS_ROLE_STA) | |
150 | && (tpriv->media_connected)) { | |
151 | if (netif_queue_stopped(tpriv->netdev)) | |
152 | netif_wake_queue(tpriv->netdev); | |
153 | } | |
154 | } | |
155 | done: | |
156 | dev_kfree_skb_any(skb); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | /* | |
162 | * Packet receive completion callback handler. | |
163 | * | |
164 | * This function calls another completion callback handler which | |
165 | * updates the statistics, and optionally updates the parent buffer | |
166 | * use count before freeing the received packet. | |
167 | */ | |
168 | int mwifiex_recv_packet_complete(struct mwifiex_adapter *adapter, | |
169 | struct sk_buff *skb, int status) | |
170 | { | |
171 | struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb); | |
270e58e8 | 172 | struct mwifiex_rxinfo *rx_info_parent; |
5e6e3a92 | 173 | struct mwifiex_private *priv; |
270e58e8 | 174 | struct sk_buff *skb_parent; |
5e6e3a92 BZ |
175 | unsigned long flags; |
176 | ||
177 | priv = adapter->priv[rx_info->bss_index]; | |
178 | ||
179 | if (priv && (status == -1)) | |
180 | priv->stats.rx_dropped++; | |
181 | ||
182 | if (rx_info->parent) { | |
183 | skb_parent = rx_info->parent; | |
184 | rx_info_parent = MWIFIEX_SKB_RXCB(skb_parent); | |
185 | ||
186 | spin_lock_irqsave(&priv->rx_pkt_lock, flags); | |
187 | --rx_info_parent->use_count; | |
188 | ||
189 | if (!rx_info_parent->use_count) { | |
190 | spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); | |
191 | dev_kfree_skb_any(skb_parent); | |
192 | } else { | |
193 | spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); | |
194 | } | |
195 | } else { | |
196 | dev_kfree_skb_any(skb); | |
197 | } | |
198 | ||
199 | return 0; | |
200 | } |