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path: root/drivers/net/wireless/mwifiex/uap_event.c
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Diffstat (limited to 'drivers/net/wireless/mwifiex/uap_event.c')
-rw-r--r--drivers/net/wireless/mwifiex/uap_event.c290
1 files changed, 290 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/uap_event.c b/drivers/net/wireless/mwifiex/uap_event.c
new file mode 100644
index 000000000000..a33fa394e349
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/uap_event.c
@@ -0,0 +1,290 @@
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 * This function will return the pointer to station entry in station list
26 * table which matches specified mac address.
27 * This function should be called after acquiring RA list spinlock.
28 * NULL is returned if station entry is not found in associated STA list.
29 */
30struct mwifiex_sta_node *
31mwifiex_get_sta_entry(struct mwifiex_private *priv, u8 *mac)
32{
33 struct mwifiex_sta_node *node;
34
35 if (!mac)
36 return NULL;
37
38 list_for_each_entry(node, &priv->sta_list, list) {
39 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
40 return node;
41 }
42
43 return NULL;
44}
45
46/*
47 * This function will add a sta_node entry to associated station list
48 * table with the given mac address.
49 * If entry exist already, existing entry is returned.
50 * If received mac address is NULL, NULL is returned.
51 */
52static struct mwifiex_sta_node *
53mwifiex_add_sta_entry(struct mwifiex_private *priv, u8 *mac)
54{
55 struct mwifiex_sta_node *node;
56 unsigned long flags;
57
58 if (!mac)
59 return NULL;
60
61 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
62 node = mwifiex_get_sta_entry(priv, mac);
63 if (node)
64 goto done;
65
66 node = kzalloc(sizeof(struct mwifiex_sta_node), GFP_ATOMIC);
67 if (!node)
68 goto done;
69
70 memcpy(node->mac_addr, mac, ETH_ALEN);
71 list_add_tail(&node->list, &priv->sta_list);
72
73done:
74 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
75 return node;
76}
77
78/*
79 * This function will search for HT IE in association request IEs
80 * and set station HT parameters accordingly.
81 */
82static void
83mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
84 int ies_len, struct mwifiex_sta_node *node)
85{
86 const struct ieee80211_ht_cap *ht_cap;
87
88 if (!ies)
89 return;
90
91 ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
92 if (ht_cap) {
93 node->is_11n_enabled = 1;
94 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
95 IEEE80211_HT_CAP_MAX_AMSDU ?
96 MWIFIEX_TX_DATA_BUF_SIZE_8K :
97 MWIFIEX_TX_DATA_BUF_SIZE_4K;
98 } else {
99 node->is_11n_enabled = 0;
100 }
101
102 return;
103}
104
105/*
106 * This function will delete a station entry from station list
107 */
108static void mwifiex_del_sta_entry(struct mwifiex_private *priv, u8 *mac)
109{
110 struct mwifiex_sta_node *node, *tmp;
111 unsigned long flags;
112
113 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
114
115 node = mwifiex_get_sta_entry(priv, mac);
116 if (node) {
117 list_for_each_entry_safe(node, tmp, &priv->sta_list,
118 list) {
119 list_del(&node->list);
120 kfree(node);
121 }
122 }
123
124 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
125 return;
126}
127
128/*
129 * This function will delete all stations from associated station list.
130 */
131static void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
132{
133 struct mwifiex_sta_node *node, *tmp;
134 unsigned long flags;
135
136 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
137
138 list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
139 list_del(&node->list);
140 kfree(node);
141 }
142
143 INIT_LIST_HEAD(&priv->sta_list);
144 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
145 return;
146}
147
148/*
149 * This function handles AP interface specific events generated by firmware.
150 *
151 * Event specific routines are called by this function based
152 * upon the generated event cause.
153 *
154 *
155 * Events supported for AP -
156 * - EVENT_UAP_STA_ASSOC
157 * - EVENT_UAP_STA_DEAUTH
158 * - EVENT_UAP_BSS_ACTIVE
159 * - EVENT_UAP_BSS_START
160 * - EVENT_UAP_BSS_IDLE
161 * - EVENT_UAP_MIC_COUNTERMEASURES:
162 */
163int mwifiex_process_uap_event(struct mwifiex_private *priv)
164{
165 struct mwifiex_adapter *adapter = priv->adapter;
166 int len, i;
167 u32 eventcause = adapter->event_cause;
168 struct station_info sinfo;
169 struct mwifiex_assoc_event *event;
170 struct mwifiex_sta_node *node;
171 u8 *deauth_mac;
172 struct host_cmd_ds_11n_batimeout *ba_timeout;
173 u16 ctrl;
174
175 switch (eventcause) {
176 case EVENT_UAP_STA_ASSOC:
177 memset(&sinfo, 0, sizeof(sinfo));
178 event = (struct mwifiex_assoc_event *)
179 (adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
180 if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
181 len = -1;
182
183 if (ieee80211_is_assoc_req(event->frame_control))
184 len = 0;
185 else if (ieee80211_is_reassoc_req(event->frame_control))
186 /* There will be ETH_ALEN bytes of
187 * current_ap_addr before the re-assoc ies.
188 */
189 len = ETH_ALEN;
190
191 if (len != -1) {
192 sinfo.filled = STATION_INFO_ASSOC_REQ_IES;
193 sinfo.assoc_req_ies = &event->data[len];
194 len = (u8 *)sinfo.assoc_req_ies -
195 (u8 *)&event->frame_control;
196 sinfo.assoc_req_ies_len =
197 le16_to_cpu(event->len) - (u16)len;
198 }
199 }
200 cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
201 GFP_KERNEL);
202
203 node = mwifiex_add_sta_entry(priv, event->sta_addr);
204 if (!node) {
205 dev_warn(adapter->dev,
206 "could not create station entry!\n");
207 return -1;
208 }
209
210 if (!priv->ap_11n_enabled)
211 break;
212
213 mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
214 sinfo.assoc_req_ies_len, node);
215
216 for (i = 0; i < MAX_NUM_TID; i++) {
217 if (node->is_11n_enabled)
218 node->ampdu_sta[i] =
219 priv->aggr_prio_tbl[i].ampdu_user;
220 else
221 node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
222 }
223 memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
224 break;
225 case EVENT_UAP_STA_DEAUTH:
226 deauth_mac = adapter->event_body +
227 MWIFIEX_UAP_EVENT_EXTRA_HEADER;
228 cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);
229
230 if (priv->ap_11n_enabled) {
231 mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
232 mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
233 }
234 mwifiex_del_sta_entry(priv, deauth_mac);
235 break;
236 case EVENT_UAP_BSS_IDLE:
237 priv->media_connected = false;
238 mwifiex_clean_txrx(priv);
239 mwifiex_del_all_sta_list(priv);
240 break;
241 case EVENT_UAP_BSS_ACTIVE:
242 priv->media_connected = true;
243 break;
244 case EVENT_UAP_BSS_START:
245 dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
246 memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
247 ETH_ALEN);
248 break;
249 case EVENT_UAP_MIC_COUNTERMEASURES:
250 /* For future development */
251 dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
252 break;
253 case EVENT_AMSDU_AGGR_CTRL:
254 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
255 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
256
257 if (priv->media_connected) {
258 adapter->tx_buf_size =
259 min_t(u16, adapter->curr_tx_buf_size, ctrl);
260 dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
261 adapter->tx_buf_size);
262 }
263 break;
264 case EVENT_ADDBA:
265 dev_dbg(adapter->dev, "event: ADDBA Request\n");
266 if (priv->media_connected)
267 mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP,
268 HostCmd_ACT_GEN_SET, 0,
269 adapter->event_body);
270 break;
271 case EVENT_DELBA:
272 dev_dbg(adapter->dev, "event: DELBA Request\n");
273 if (priv->media_connected)
274 mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
275 break;
276 case EVENT_BA_STREAM_TIEMOUT:
277 dev_dbg(adapter->dev, "event: BA Stream timeout\n");
278 if (priv->media_connected) {
279 ba_timeout = (void *)adapter->event_body;
280 mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
281 }
282 break;
283 default:
284 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
285 eventcause);
286 break;
287 }
288
289 return 0;
290}
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