Linux-libre 3.16.85-gnu
[librecmc/linux-libre.git] / drivers / net / wireless / mwifiex / uap_event.c
1 /*
2  * Marvell Wireless LAN device driver: AP event handling
3  *
4  * Copyright (C) 2012, 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 "main.h"
22 #include "11n.h"
23
24
25
26
27 /*
28  * This function handles AP interface specific events generated by firmware.
29  *
30  * Event specific routines are called by this function based
31  * upon the generated event cause.
32  *
33  *
34  * Events supported for AP -
35  *      - EVENT_UAP_STA_ASSOC
36  *      - EVENT_UAP_STA_DEAUTH
37  *      - EVENT_UAP_BSS_ACTIVE
38  *      - EVENT_UAP_BSS_START
39  *      - EVENT_UAP_BSS_IDLE
40  *      - EVENT_UAP_MIC_COUNTERMEASURES:
41  */
42 int mwifiex_process_uap_event(struct mwifiex_private *priv)
43 {
44         struct mwifiex_adapter *adapter = priv->adapter;
45         int len, i;
46         u32 eventcause = adapter->event_cause;
47         struct station_info sinfo;
48         struct mwifiex_assoc_event *event;
49         struct mwifiex_sta_node *node;
50         u8 *deauth_mac;
51         struct host_cmd_ds_11n_batimeout *ba_timeout;
52         u16 ctrl;
53
54         switch (eventcause) {
55         case EVENT_UAP_STA_ASSOC:
56                 memset(&sinfo, 0, sizeof(sinfo));
57                 event = (struct mwifiex_assoc_event *)
58                         (adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
59                 if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
60                         len = -1;
61
62                         if (ieee80211_is_assoc_req(event->frame_control))
63                                 len = 0;
64                         else if (ieee80211_is_reassoc_req(event->frame_control))
65                                 /* There will be ETH_ALEN bytes of
66                                  * current_ap_addr before the re-assoc ies.
67                                  */
68                                 len = ETH_ALEN;
69
70                         if (len != -1) {
71                                 sinfo.filled = STATION_INFO_ASSOC_REQ_IES;
72                                 sinfo.assoc_req_ies = &event->data[len];
73                                 len = (u8 *)sinfo.assoc_req_ies -
74                                       (u8 *)&event->frame_control;
75                                 sinfo.assoc_req_ies_len =
76                                         le16_to_cpu(event->len) - (u16)len;
77                         }
78                 }
79                 cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
80                                  GFP_KERNEL);
81
82                 node = mwifiex_add_sta_entry(priv, event->sta_addr);
83                 if (!node) {
84                         dev_warn(adapter->dev,
85                                  "could not create station entry!\n");
86                         return -1;
87                 }
88
89                 if (!priv->ap_11n_enabled)
90                         break;
91
92                 mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
93                                        sinfo.assoc_req_ies_len, node);
94
95                 for (i = 0; i < MAX_NUM_TID; i++) {
96                         if (node->is_11n_enabled)
97                                 node->ampdu_sta[i] =
98                                               priv->aggr_prio_tbl[i].ampdu_user;
99                         else
100                                 node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
101                 }
102                 memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
103                 break;
104         case EVENT_UAP_STA_DEAUTH:
105                 deauth_mac = adapter->event_body +
106                              MWIFIEX_UAP_EVENT_EXTRA_HEADER;
107                 cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);
108
109                 if (priv->ap_11n_enabled) {
110                         mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
111                         mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
112                 }
113                 mwifiex_del_sta_entry(priv, deauth_mac);
114                 break;
115         case EVENT_UAP_BSS_IDLE:
116                 priv->media_connected = false;
117                 if (netif_carrier_ok(priv->netdev))
118                         netif_carrier_off(priv->netdev);
119                 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
120
121                 mwifiex_clean_txrx(priv);
122                 mwifiex_del_all_sta_list(priv);
123                 break;
124         case EVENT_UAP_BSS_ACTIVE:
125                 priv->media_connected = true;
126                 if (!netif_carrier_ok(priv->netdev))
127                         netif_carrier_on(priv->netdev);
128                 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
129                 break;
130         case EVENT_UAP_BSS_START:
131                 dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
132                 memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
133                        ETH_ALEN);
134                 break;
135         case EVENT_UAP_MIC_COUNTERMEASURES:
136                 /* For future development */
137                 dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
138                 break;
139         case EVENT_AMSDU_AGGR_CTRL:
140                 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
141                 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
142
143                 if (priv->media_connected) {
144                         adapter->tx_buf_size =
145                                 min_t(u16, adapter->curr_tx_buf_size, ctrl);
146                         dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
147                                 adapter->tx_buf_size);
148                 }
149                 break;
150         case EVENT_ADDBA:
151                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
152                 if (priv->media_connected)
153                         mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
154                                          HostCmd_ACT_GEN_SET, 0,
155                                          adapter->event_body, false);
156                 break;
157         case EVENT_DELBA:
158                 dev_dbg(adapter->dev, "event: DELBA Request\n");
159                 if (priv->media_connected)
160                         mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
161                 break;
162         case EVENT_BA_STREAM_TIEMOUT:
163                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
164                 if (priv->media_connected) {
165                         ba_timeout = (void *)adapter->event_body;
166                         mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
167                 }
168                 break;
169         case EVENT_EXT_SCAN_REPORT:
170                 dev_dbg(adapter->dev, "event: EXT_SCAN Report\n");
171                 if (adapter->ext_scan)
172                         return mwifiex_handle_event_ext_scan_report(priv,
173                                                 adapter->event_skb->data);
174                 break;
175         default:
176                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
177                         eventcause);
178                 break;
179         }
180
181         return 0;
182 }
183
184 /* This function deletes station entry from associated station list.
185  * Also if both AP and STA are 11n enabled, RxReorder tables and TxBA stream
186  * tables created for this station are deleted.
187  */
188 void mwifiex_uap_del_sta_data(struct mwifiex_private *priv,
189                               struct mwifiex_sta_node *node)
190 {
191         if (priv->ap_11n_enabled && node->is_11n_enabled) {
192                 mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, node->mac_addr);
193                 mwifiex_del_tx_ba_stream_tbl_by_ra(priv, node->mac_addr);
194         }
195         mwifiex_del_sta_entry(priv, node->mac_addr);
196
197         return;
198 }