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3d99d987 AP |
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" | |
5a009adf | 22 | #include "11n.h" |
3d99d987 | 23 | |
017a92a1 AP |
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 | */ | |
30 | struct mwifiex_sta_node * | |
31 | mwifiex_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 | */ | |
52 | static struct mwifiex_sta_node * | |
53 | mwifiex_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 | ||
126f4923 | 66 | node = kzalloc(sizeof(struct mwifiex_sta_node), GFP_ATOMIC); |
017a92a1 AP |
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 | ||
73 | done: | |
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 | */ | |
82 | static void | |
83 | mwifiex_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 | */ | |
108 | static void mwifiex_del_sta_entry(struct mwifiex_private *priv, u8 *mac) | |
109 | { | |
bdd4d6bf | 110 | struct mwifiex_sta_node *node; |
017a92a1 AP |
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) { | |
bdd4d6bf AP |
117 | list_del(&node->list); |
118 | kfree(node); | |
017a92a1 AP |
119 | } |
120 | ||
121 | spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); | |
122 | return; | |
123 | } | |
124 | ||
125 | /* | |
126 | * This function will delete all stations from associated station list. | |
127 | */ | |
128 | static void mwifiex_del_all_sta_list(struct mwifiex_private *priv) | |
129 | { | |
130 | struct mwifiex_sta_node *node, *tmp; | |
131 | unsigned long flags; | |
132 | ||
133 | spin_lock_irqsave(&priv->sta_list_spinlock, flags); | |
134 | ||
135 | list_for_each_entry_safe(node, tmp, &priv->sta_list, list) { | |
136 | list_del(&node->list); | |
137 | kfree(node); | |
138 | } | |
139 | ||
140 | INIT_LIST_HEAD(&priv->sta_list); | |
141 | spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); | |
142 | return; | |
143 | } | |
144 | ||
3d99d987 AP |
145 | /* |
146 | * This function handles AP interface specific events generated by firmware. | |
147 | * | |
148 | * Event specific routines are called by this function based | |
149 | * upon the generated event cause. | |
150 | * | |
151 | * | |
152 | * Events supported for AP - | |
153 | * - EVENT_UAP_STA_ASSOC | |
154 | * - EVENT_UAP_STA_DEAUTH | |
155 | * - EVENT_UAP_BSS_ACTIVE | |
156 | * - EVENT_UAP_BSS_START | |
157 | * - EVENT_UAP_BSS_IDLE | |
158 | * - EVENT_UAP_MIC_COUNTERMEASURES: | |
159 | */ | |
160 | int mwifiex_process_uap_event(struct mwifiex_private *priv) | |
161 | { | |
162 | struct mwifiex_adapter *adapter = priv->adapter; | |
017a92a1 | 163 | int len, i; |
3d99d987 AP |
164 | u32 eventcause = adapter->event_cause; |
165 | struct station_info sinfo; | |
166 | struct mwifiex_assoc_event *event; | |
017a92a1 AP |
167 | struct mwifiex_sta_node *node; |
168 | u8 *deauth_mac; | |
5a009adf | 169 | struct host_cmd_ds_11n_batimeout *ba_timeout; |
8dd4372e | 170 | u16 ctrl; |
3d99d987 AP |
171 | |
172 | switch (eventcause) { | |
173 | case EVENT_UAP_STA_ASSOC: | |
174 | memset(&sinfo, 0, sizeof(sinfo)); | |
175 | event = (struct mwifiex_assoc_event *) | |
176 | (adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER); | |
177 | if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) { | |
178 | len = -1; | |
179 | ||
180 | if (ieee80211_is_assoc_req(event->frame_control)) | |
181 | len = 0; | |
182 | else if (ieee80211_is_reassoc_req(event->frame_control)) | |
183 | /* There will be ETH_ALEN bytes of | |
184 | * current_ap_addr before the re-assoc ies. | |
185 | */ | |
186 | len = ETH_ALEN; | |
187 | ||
188 | if (len != -1) { | |
189 | sinfo.filled = STATION_INFO_ASSOC_REQ_IES; | |
190 | sinfo.assoc_req_ies = &event->data[len]; | |
191 | len = (u8 *)sinfo.assoc_req_ies - | |
192 | (u8 *)&event->frame_control; | |
193 | sinfo.assoc_req_ies_len = | |
194 | le16_to_cpu(event->len) - (u16)len; | |
195 | } | |
196 | } | |
197 | cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo, | |
198 | GFP_KERNEL); | |
017a92a1 AP |
199 | |
200 | node = mwifiex_add_sta_entry(priv, event->sta_addr); | |
201 | if (!node) { | |
202 | dev_warn(adapter->dev, | |
203 | "could not create station entry!\n"); | |
204 | return -1; | |
205 | } | |
206 | ||
207 | if (!priv->ap_11n_enabled) | |
208 | break; | |
209 | ||
210 | mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies, | |
211 | sinfo.assoc_req_ies_len, node); | |
212 | ||
213 | for (i = 0; i < MAX_NUM_TID; i++) { | |
214 | if (node->is_11n_enabled) | |
215 | node->ampdu_sta[i] = | |
216 | priv->aggr_prio_tbl[i].ampdu_user; | |
217 | else | |
218 | node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED; | |
219 | } | |
220 | memset(node->rx_seq, 0xff, sizeof(node->rx_seq)); | |
3d99d987 AP |
221 | break; |
222 | case EVENT_UAP_STA_DEAUTH: | |
017a92a1 AP |
223 | deauth_mac = adapter->event_body + |
224 | MWIFIEX_UAP_EVENT_EXTRA_HEADER; | |
225 | cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL); | |
226 | ||
3e238a11 AP |
227 | if (priv->ap_11n_enabled) { |
228 | mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac); | |
229 | mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac); | |
230 | } | |
017a92a1 | 231 | mwifiex_del_sta_entry(priv, deauth_mac); |
3d99d987 AP |
232 | break; |
233 | case EVENT_UAP_BSS_IDLE: | |
234 | priv->media_connected = false; | |
47411a06 AP |
235 | if (netif_carrier_ok(priv->netdev)) |
236 | netif_carrier_off(priv->netdev); | |
237 | mwifiex_stop_net_dev_queue(priv->netdev, adapter); | |
238 | ||
3e238a11 | 239 | mwifiex_clean_txrx(priv); |
017a92a1 | 240 | mwifiex_del_all_sta_list(priv); |
3d99d987 AP |
241 | break; |
242 | case EVENT_UAP_BSS_ACTIVE: | |
243 | priv->media_connected = true; | |
47411a06 AP |
244 | if (!netif_carrier_ok(priv->netdev)) |
245 | netif_carrier_on(priv->netdev); | |
246 | mwifiex_wake_up_net_dev_queue(priv->netdev, adapter); | |
3d99d987 AP |
247 | break; |
248 | case EVENT_UAP_BSS_START: | |
249 | dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause); | |
250 | memcpy(priv->netdev->dev_addr, adapter->event_body + 2, | |
251 | ETH_ALEN); | |
252 | break; | |
253 | case EVENT_UAP_MIC_COUNTERMEASURES: | |
254 | /* For future development */ | |
255 | dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause); | |
256 | break; | |
d1cf3b95 | 257 | case EVENT_AMSDU_AGGR_CTRL: |
8dd4372e BZ |
258 | ctrl = le16_to_cpu(*(__le16 *)adapter->event_body); |
259 | dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl); | |
d1cf3b95 AP |
260 | |
261 | if (priv->media_connected) { | |
262 | adapter->tx_buf_size = | |
8dd4372e | 263 | min_t(u16, adapter->curr_tx_buf_size, ctrl); |
d1cf3b95 AP |
264 | dev_dbg(adapter->dev, "event: tx_buf_size %d\n", |
265 | adapter->tx_buf_size); | |
266 | } | |
267 | break; | |
5a009adf AP |
268 | case EVENT_ADDBA: |
269 | dev_dbg(adapter->dev, "event: ADDBA Request\n"); | |
270 | if (priv->media_connected) | |
271 | mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP, | |
272 | HostCmd_ACT_GEN_SET, 0, | |
273 | adapter->event_body); | |
274 | break; | |
275 | case EVENT_DELBA: | |
276 | dev_dbg(adapter->dev, "event: DELBA Request\n"); | |
277 | if (priv->media_connected) | |
278 | mwifiex_11n_delete_ba_stream(priv, adapter->event_body); | |
279 | break; | |
280 | case EVENT_BA_STREAM_TIEMOUT: | |
281 | dev_dbg(adapter->dev, "event: BA Stream timeout\n"); | |
282 | if (priv->media_connected) { | |
283 | ba_timeout = (void *)adapter->event_body; | |
284 | mwifiex_11n_ba_stream_timeout(priv, ba_timeout); | |
285 | } | |
286 | break; | |
3d99d987 AP |
287 | default: |
288 | dev_dbg(adapter->dev, "event: unknown event id: %#x\n", | |
289 | eventcause); | |
290 | break; | |
291 | } | |
292 | ||
293 | return 0; | |
294 | } | |
0f9e9b8b AP |
295 | |
296 | /* This function deletes station entry from associated station list. | |
297 | * Also if both AP and STA are 11n enabled, RxReorder tables and TxBA stream | |
298 | * tables created for this station are deleted. | |
299 | */ | |
300 | void mwifiex_uap_del_sta_data(struct mwifiex_private *priv, | |
301 | struct mwifiex_sta_node *node) | |
302 | { | |
303 | if (priv->ap_11n_enabled && node->is_11n_enabled) { | |
304 | mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, node->mac_addr); | |
305 | mwifiex_del_tx_ba_stream_tbl_by_ra(priv, node->mac_addr); | |
306 | } | |
307 | mwifiex_del_sta_entry(priv, node->mac_addr); | |
308 | ||
309 | return; | |
310 | } |